WorldWideScience

Sample records for based performance evaluation

  1. Performance-Based Evaluation and School Librarians

    Science.gov (United States)

    Church, Audrey P.

    2015-01-01

    Evaluation of instructional personnel is standard procedure in our Pre-K-12 public schools, and its purpose is to document educator effectiveness. With Race to the Top and No Child Left Behind waivers, states are required to implement performance-based evaluations that demonstrate student academic progress. This three-year study describes the…

  2. Performance Evaluation of Triangulation Based Range Sensors

    Directory of Open Access Journals (Sweden)

    Monica Bordegoni

    2010-07-01

    Full Text Available The performance of 2D digital imaging systems depends on several factors related with both optical and electronic processing. These concepts have originated standards, which have been conceived for photographic equipment and bi-dimensional scanning systems, and which have been aimed at estimating different parameters such as resolution, noise or dynamic range. Conversely, no standard test protocols currently exist for evaluating the corresponding performances of 3D imaging systems such as laser scanners or pattern projection range cameras. This paper is focused on investigating experimental processes for evaluating some critical parameters of 3D equipment, by extending the concepts defined by the ISO standards to the 3D domain. The experimental part of this work concerns the characterization of different range sensors through the extraction of their resolution, accuracy and uncertainty from sets of 3D data acquisitions of specifically designed test objects whose geometrical characteristics are known in advance. The major objective of this contribution is to suggest an easy characterization process for generating a reliable comparison between the performances of different range sensors and to check if a specific piece of equipment is compliant with the expected characteristics.

  3. Team Primacy Concept (TPC) Based Employee Evaluation and Job Performance

    Science.gov (United States)

    Muniute, Eivina I.; Alfred, Mary V.

    2007-01-01

    This qualitative study explored how employees learn from Team Primacy Concept (TPC) based employee evaluation and how they use the feedback in performing their jobs. TPC based evaluation is a form of multirater evaluation, during which the employee's performance is discussed by one's peers in a face-to-face team setting. The study used Kolb's…

  4. Research on Performance Evaluation by IDSS Based on AHP

    Directory of Open Access Journals (Sweden)

    Tang Xuelian

    2013-03-01

    Full Text Available Talent resource is the primary resource. There are two sides as the starting point and foothold in this paper. One is how to evaluate the performance of science and technology talents flow by IDSS (Intelligence Decision Supporting System. Another is how to guide the innovation work of science and technology according to the evaluation results. The evaluation index on performance system has hierarchical structure. So AHP (Analytic Hierarchy Process is applied to evaluate the performance. Evaluation model is established and illustrated by the cases in this paper. It can be seen that the flow of performance is influenced by the growth rate of important scientific and technological achievements. Furthermore, some constructive suggestions are given based on the results of evaluation.

  5. Evaluating performance of a Bluetooth-based classroom tool

    OpenAIRE

    Davidrajuh, Reggie

    2009-01-01

    This paper focuses on the performance evaluation of a Bluetooth wireless technology based classroom tool. The classroom tool is to help lecturers automate their assignment tests. First, a testing prototype of the tool is presented; the testing prototype uses one master device and two slave devices on Pico-net. As it will be expensive to build prototype for a large class, simulation study is done to evaluate performance of the tool for large classes. The simulation study reveals ...

  6. A dynamic performance evaluation method based on SD-BSC

    Institute of Scientific and Technical Information of China (English)

    TENG Chun-xian; PAN Xiao-dong; HU Xian-wu

    2007-01-01

    Taking into consideration the disadvantage of Balanced Scorecard (BSC) not being able to reflect time delay, nonlinear problems of causal relationship and being lack of effective simulation, we combined it with the characteristics of the System Dynamics (SD). Basing on the background of manufacturing enterprises,through SD integrating with the BSC we established a new performance evaluation method-SD-BSC method to overcome the disadvantage of BSC. A performance evaluation model of SD-BSC is provided and the simulation results are analyzed which show different production policies will lead to different customer's satisfaction degrees. The SD-BSC dynamic performance evaluation method can reflect dynamic, complex causal feedback relationship and time delay, so it compensates for the disadvantage of traditional financial performance evaluation method, and at the same time makes the BSC perfect.

  7. Performance evaluation of sensor allocation algorithm based on covariance control

    Institute of Scientific and Technical Information of China (English)

    2005-01-01

    The covariance control capability of sensor allocation algorithms based on covariance control strategy is an important index to evaluate the performance of these algorithms. Owing to lack of standard performance metric indices to evaluate covariance control capability, sensor allocation ratio, etc, there are no guides to follow in the design procedure of sensor allocation algorithm in practical applications. To meet these demands, three quantified performance metric indices are presented, which are average covariance misadjustment quantity (ACMQ), average sensor allocation ratio (ASAR) and matrix metric influence factor (MMIF), where ACMQ, ASAR and MMIF quantify the covariance control capability, the usage of sensor resources and the robustness of sensor allocation algorithm, respectively. Meanwhile, a covariance adaptive sensor allocation algorithm based on a new objective function is proposed to improve the covariance control capability of the algorithm based on information gain. The experiment results show that the proposed algorithm have the advantage over the preceding sensor allocation algorithm in covariance control capability and robustness.

  8. Performance-based concept on seismic evaluation of existing bridges

    Institute of Scientific and Technical Information of China (English)

    Yu-Chi Sung; Wen-I Liao; W.Phillip Yen

    2009-01-01

    Conventional seismic evaluation of existing bridges explores the ability of a bridge to survive under significant earthquake excitations. This approach has several major drawbacks, such as only a single structural performance of near collapse is considered, and the simplified approach of adopting strength-based concept to indirectly estimate the nonlinear behavior of a structure lacks accuracy. As a result, performance-based concepts that include a wider variety of structural performance states of a given bridge excited by different levels of earthquake intensity is needed by the engineering community. This paper introduces an improved process for the seismic evaluation of existing bridges. The relationship between the overall structural performance and earthquakes with varying levels of peak ground acceleration (PGA) can successfully be linked. A universal perspective on the seismic evaluation of bridges over their entire life-cycle can be easily obtained to investigate multiple performance objectives. The accuracy of the proposed method, based on pushover analysis, is proven in a case study that compares the results from the proposed procedure with additional nonlinear time history analyses.

  9. Implementation and Performance Evaluation of IPSec VPN Based on Netfilter

    Institute of Scientific and Technical Information of China (English)

    ZHAO Da-yuan; JIANG Yi-xin; LIN Chuang; LI Yan-xi

    2005-01-01

    We mainly explore two problems when combining IPSec module into TCP/IP stack by porting the famous IPSec software (FreeS/WAN) into a security gateway. One is how to implement the IPSec module based on Netfilter in Linux 2.4. x kernel. The other problem is the performance evaluation. We test the throughput of our security gateway before and after applying IPSec with different encryption/decryption algorithms, including the software-based and hardware-based method. With these testing data, we analyze further system performance bottleneck. In the end, we also infer the quantitative relation between the system throughput and the speed of encryption/decryption algorithm and propose some valuable conclusions for improving performance.

  10. MODEL-BASED PERFORMANCE EVALUATION APPROACH FOR MOBILE AGENT SYSTEMS

    Institute of Scientific and Technical Information of China (English)

    Li Xin; Mi Zhengkun; Meng Xudong

    2004-01-01

    Claimed as the next generation programming paradigm, mobile agent technology has attracted extensive interests in recent years. However, up to now, limited research efforts have been devoted to the performance study of mobile agent system and most of these researches focus on agent behavior analysis resulting in that models are hard to apply to mobile agent systems. To bridge the gap, a new performance evaluation model derived from operation mechanisms of mobile agent platforms is proposed. Details are discussed for the design of companion simulation software, which can provide the system performance such as response time of platform to mobile agent. Further investigation is followed on the determination of model parameters. Finally comparison is made between the model-based simulation results and measurement-based real performance of mobile agent systems. The results show that the proposed model and designed software are effective in evaluating performance characteristics of mobile agent systems. The proposed approach can also be considered as the basis of performance analysis for large systems composed of multiple mobile agent platforms.

  11. Performance Evaluation in Network-Based Parallel Computing

    Science.gov (United States)

    Dezhgosha, Kamyar

    1996-01-01

    Network-based parallel computing is emerging as a cost-effective alternative for solving many problems which require use of supercomputers or massively parallel computers. The primary objective of this project has been to conduct experimental research on performance evaluation for clustered parallel computing. First, a testbed was established by augmenting our existing SUNSPARCs' network with PVM (Parallel Virtual Machine) which is a software system for linking clusters of machines. Second, a set of three basic applications were selected. The applications consist of a parallel search, a parallel sort, a parallel matrix multiplication. These application programs were implemented in C programming language under PVM. Third, we conducted performance evaluation under various configurations and problem sizes. Alternative parallel computing models and workload allocations for application programs were explored. The performance metric was limited to elapsed time or response time which in the context of parallel computing can be expressed in terms of speedup. The results reveal that the overhead of communication latency between processes in many cases is the restricting factor to performance. That is, coarse-grain parallelism which requires less frequent communication between processes will result in higher performance in network-based computing. Finally, we are in the final stages of installing an Asynchronous Transfer Mode (ATM) switch and four ATM interfaces (each 155 Mbps) which will allow us to extend our study to newer applications, performance metrics, and configurations.

  12. Towards Reliable Evaluation of Anomaly-Based Intrusion Detection Performance

    Science.gov (United States)

    Viswanathan, Arun

    2012-01-01

    This report describes the results of research into the effects of environment-induced noise on the evaluation process for anomaly detectors in the cyber security domain. This research was conducted during a 10-week summer internship program from the 19th of August, 2012 to the 23rd of August, 2012 at the Jet Propulsion Laboratory in Pasadena, California. The research performed lies within the larger context of the Los Angeles Department of Water and Power (LADWP) Smart Grid cyber security project, a Department of Energy (DoE) funded effort involving the Jet Propulsion Laboratory, California Institute of Technology and the University of Southern California/ Information Sciences Institute. The results of the present effort constitute an important contribution towards building more rigorous evaluation paradigms for anomaly-based intrusion detectors in complex cyber physical systems such as the Smart Grid. Anomaly detection is a key strategy for cyber intrusion detection and operates by identifying deviations from profiles of nominal behavior and are thus conceptually appealing for detecting "novel" attacks. Evaluating the performance of such a detector requires assessing: (a) how well it captures the model of nominal behavior, and (b) how well it detects attacks (deviations from normality). Current evaluation methods produce results that give insufficient insight into the operation of a detector, inevitably resulting in a significantly poor characterization of a detectors performance. In this work, we first describe a preliminary taxonomy of key evaluation constructs that are necessary for establishing rigor in the evaluation regime of an anomaly detector. We then focus on clarifying the impact of the operational environment on the manifestation of attacks in monitored data. We show how dynamic and evolving environments can introduce high variability into the data stream perturbing detector performance. Prior research has focused on understanding the impact of this

  13. Measurement-Based Performance Evaluation of Advanced MIMO Transceiver Designs

    Directory of Open Access Journals (Sweden)

    Schneider Christian

    2005-01-01

    Full Text Available This paper describes the methodology and the results of performance investigations on a multiple-input multiple-output (MIMO transceiver scheme for frequency-selective radio channels. The method relies on offline simulations and employs real-time MIMO channel sounder measurement data to ensure a realistic channel modeling. Thus it can be classified in between the performance evaluation using some predefined channel models and the evaluation of a prototype hardware in field experiments. New aspects for the simulation setup are discussed, which are frequently ignored when using simpler model-based evaluations. Example simulations are provided for an iterative ("turbo" MIMO equalizer concept. The dependency of the achievable bit error rate performance on the propagation characteristics and on the variation in some system design parameters is shown, whereas the antenna constellation is of particular concern for MIMO systems. Although in many of the considered constellations turbo MIMO equalization appears feasible in real field scenarios, there exist cases with poor performance as well, indicating that in practical applications link adaptation of the transmitter and receiver processing to the environment is necessary.

  14. Performance Evaluation of Java Based Object Relational Mapping Tools

    Directory of Open Access Journals (Sweden)

    Shoaib Mahmood Bhatti

    2013-04-01

    Full Text Available Object persistency is the hot issue in the form of ORM (Object Relational Mapping tools in industry as developers use these tools during software development. This paper presents the performance evaluation of Java based ORM tools. For this purpose, Hibernate, Ebean and TopLinkhave been selected as the ORM tools which are popular and open source. Their performance has been measured from execution point of view. The results show that ORM tools are the good option for the developers considering the system throughput in shorter setbacks and they can be used efficiently and effectively for performing mapping of the objects into the relational dominated world of database, thus creating a hope for a better and well dominated future of this technology.

  15. Performance Evaluation of a Biometric System Based on Acoustic Images

    Directory of Open Access Journals (Sweden)

    Juan J. Villacorta

    2011-10-01

    Full Text Available An acoustic electronic scanning array for acquiring images from a person using a biometric application is developed. Based on pulse-echo techniques, multifrequency acoustic images are obtained for a set of positions of a person (front, front with arms outstretched, back and side. Two Uniform Linear Arrays (ULA with 15 l/2-equispaced sensors have been employed, using different spatial apertures in order to reduce sidelobe levels. Working frequencies have been designed on the basis of the main lobe width, the grating lobe levels and the frequency responses of people and sensors. For a case-study with 10 people, the acoustic profiles, formed by all images acquired, are evaluated and compared in a mean square error sense. Finally, system performance, using False Match Rate (FMR/False Non-Match Rate (FNMR parameters and the Receiver Operating Characteristic (ROC curve, is evaluated. On the basis of the obtained results, this system could be used for biometric applications.

  16. Software Engineering a Web Based Performance Evaluation System and Devising Mathematical Model forPerformance Measurement

    Directory of Open Access Journals (Sweden)

    Bekim Fetaji

    2014-05-01

    Full Text Available This research study tries to foster a research on software engineering of a web based solution for performance evaluation. The contributions of the research study are development of a methodology perspective, mathematical model of estimation calculationand performance measurements with its analyses, insights and recommendations. The methodology includes applying different patterns, structural definitions and creating five-layered application that will follow the cyclomatic code analyses recommendations. Another contribution that the study tries to make is to become a good reference point for further researches in developing performance evaluation. Finally, the research results, insights and user evaluations have been stated and recommendations are provided.

  17. PERFORMANCE EVALUATION OF PCF BASED AWG DEMULTIPLEXERS FOR OPTICAL NETWORK

    Directory of Open Access Journals (Sweden)

    JYOTHI DIGGE,

    2011-05-01

    Full Text Available In this paper, we emphasize on the design and simulation of four channel, Photonic crystal Fiber(PCF based arrayed waveguide (AWG Demultiplexers for optical communication network. We have considered two types of AWG Demultiplexers, namely multicore and dual concentric core PCF.The simulation is performed for 1550nm central wavelength. The change in the effective index and dispersion is evaluated. The results show that dual concentric core PCF based AWG offers a dispersion of -4200 ps/nm/km dispersion and multicore PCF AWG offers -3500ps/nm/km dispersion, enabling the separation of wavelength. Finite difference time domain (FDTD and Beam Propagation method is used for the analysis. The spectral response shows that the device hasa wide free spectral range(FSR sufficient enough to provide 100GHz Channel separation.

  18. Performance Evaluation of Marine Industries Based on Eco-economy

    OpenAIRE

    Minli Gong; Yanqing Qi

    2013-01-01

    An assessment framework is made to evaluate the performance factors of marine industries from the perspective of eco-economics by means of the AHP and the Delphi methods. Results are as follows: Performance assessment index of marine industries is decided by ecological performance, economic performance and social performance with ecological index taking priority over economic index; the efficiency of economy output and value-creating are preferred in the pursuit of low energy-consuming and le...

  19. Optimal contracts based on subjective performance evaluations and reciprocity

    DEFF Research Database (Denmark)

    Sebald, Alexander Christopher; Walzl, Markus

    2015-01-01

    As demonstrated in a recent laboratory experiment (see Sebald & Walzl, 2014), individuals tend to sanction others who subjectively evaluate their performance whenever this assessment falls short of the individuals’ self-evaluation. Interestingly, this is the case even if the individuals’ earnings...... are unaffected by the subjective performance appraisal. Hence, performance feedback which falls short of agents’ self- evaluations can be interpreted as an unkind act that triggers a negatively reciprocal response not only if the assessment determines agents’ earnings but also when it lacks monetary consequences...

  20. Plant operator performance evaluation based on cognitive process analysis experiment

    International Nuclear Information System (INIS)

    This paper reports on an experiment to clarify plant operators' cognitive processes that has been performed, to improve the man-machine interface which supports their diagnoses and decisions. The cognitive processes under abnormal conditions were evaluated by protocol analyses interviews, etc. in the experiment using a plant training simulator. A cognitive process model is represented by a stochastic network, based on Rasmussen's decision making model. Each node of the network corresponds to an element of the cognitive process, such as observation, interpretation, execution, etc. Some observations were obtained as follows, by comparison of Monte Carlo simulation results with the experiment results: A process to reconfirm the plant parameters after execution of a task and feedback paths from this process to the observation and the task definition of next task were observed. The feedback probability average and standard deviation should be determined for each incident type to explain correctly the individual differences in the cognitive processes. The tendency for the operator's cognitive level to change from skill-based to knowledge-based via rule-based behavior was observed during the feedback process

  1. Performance Evaluation Based on EFQM Excellence Model in Sport Organizations

    Directory of Open Access Journals (Sweden)

    Rasoul Faraji

    2012-06-01

    Full Text Available The present study aims to evaluate the performance of physical education (P.E. general office of Tehran province through model of European Foundation for Quality Management (EFQM. Questionnaire approach was used in this study. Therefore validity of the 50-item EFQM questionnaire verified by the experts and the reliability also calculated in a pilot study (α=0.928. 95 questionnaires distributed between subjects (N=n and 80 questionnaires returned and concluded in the statistical analysis. From nine EFQM criteria, the highest scores were gained in key performance results (37.62% and the lowest gained in people results (27.94%. Totally, this organization achieved 337.11 pointes out of a total of 1000. Additionally, there was a strong relationship (r=0.827, p=0.001 between enablers and results (P<0.05. Based on scores gained in the criteria, improving measures in all criteria is essential for this organization, especially in the people criterion from enablers and people results criterion from results domain. Furthermore, it is believed that the physical education area is one of the best fields for application of the excellence model towards the performance excellence and gaining better results and hence, it seems that the model has a high potential in responding to problems commonly seen in sport sector.

  2. Bidirectional MIMO Channel Tracking Based on PASTd and Performance Evaluation

    Directory of Open Access Journals (Sweden)

    Shayevitz Ofer

    2010-01-01

    Full Text Available Abstract We consider a bidirectional time division duplex (TDD multiple-input multiple-output (MIMO communication system with time-varying channel and additive white Gaussian noise (AWGN. A blind bidirectional channel tracking algorithm, based on the projection approximation subspace tracking (PAST algorithm, is applied in both terminals. The resulting singular value decomposition (SVD of the channel matrix is then used to approximately diagonalize the channel. The proposed method is applied to an orthogonal frequency-division multiplexing-(OFDM-MIMO setting with a typical indoor time-domain reflection model. The computational cost of the proposed algorithm, compared with other state-of-the-art algorithms, is relatively small. The Kalman filter is utilized for establishing a benchmark for the obtained performance of the proposed tracking algorithm. The performance degradation relative to a full channel state information (CSI due to the application of the tracking algorithm is evaluated in terms of average effective rate and the outage probability and compared with alternative tracking algorithms. The obtained results are also compared with a benchmark obtained by the Kalman filter with known input signal and channel characteristics. It is shown that the expected degradation in performance of frequency-domain algorithms (which do not exploit the smooth frequency response of the channel is only minor compared with time-domain algorithms in a range of reasonable signal-to-noise ratio (SNR levels. The proposed bidirectional frequency-domain tracking algorithm, proposed in this paper, is shown to attain communication rates close to the benchmark and to outperform a competing algorithm. The paper is concluded by evaluating the proposed blind tracking method in terms of the outage probability and the symbol error rate (SER versus. SNR for binary phase shift keying (BPSK and 4-Quadrature amplitude modulation (QAM constellations.

  3. Performance Evaluation of Marine Industries Based on Eco-economy

    Directory of Open Access Journals (Sweden)

    Minli Gong

    2013-03-01

    Full Text Available An assessment framework is made to evaluate the performance factors of marine industries from the perspective of eco-economics by means of the AHP and the Delphi methods. Results are as follows: Performance assessment index of marine industries is decided by ecological performance, economic performance and social performance with ecological index taking priority over economic index; the efficiency of economy output and value-creating are preferred in the pursuit of low energy-consuming and less polluting marine industries; and in the near future, marine industries will make the greatest contribution to employment.

  4. Evaluating hydrological model performance using information theory-based metrics

    Science.gov (United States)

    The accuracy-based model performance metrics not necessarily reflect the qualitative correspondence between simulated and measured streamflow time series. The objective of this work was to use the information theory-based metrics to see whether they can be used as complementary tool for hydrologic m...

  5. 75 FR 32484 - Array-Based Cytogenetic Tests: Questions on Performance Evaluation, Result Reporting and...

    Science.gov (United States)

    2010-06-08

    ... Performance Evaluation, Result Reporting and Interpretation. The purpose of the public meeting is to seek input on challenges related to performance evaluation, determination of clinical significance, result... HUMAN SERVICES Food and Drug Administration Array-Based Cytogenetic Tests: Questions on...

  6. Validation of Ultrafilter Performance Model Based on Systematic Simulant Evaluation

    International Nuclear Information System (INIS)

    Because of limited availability of test data with actual Hanford tank waste samples, a method was developed to estimate expected filtration performance based on physical characterization data for the Hanford Tank Waste Treatment and Immobilization Plant. A test with simulated waste was analyzed to demonstrate that filtration of this class of waste is consistent with a concentration polarization model. Subsequently, filtration data from actual waste samples were analyzed to demonstrate that centrifuged solids concentrations provide a reasonable estimate of the limiting concentration for filtration.

  7. Performance and evaluation of desiccant based air conditioning system.

    Directory of Open Access Journals (Sweden)

    Gaurav S. Wani

    2014-12-01

    Full Text Available This Project work presents study and experimental analysis of Desiccant based air conditioning system.The main purpose of this project is to increase the efficency of air conditioning system.In the convenstional air conditioning system cooling coli has two load latent load and sensible load. Cooling has to cool the air and simultaneously to dehumidify it.It increases load on cooling coil and affects performance to the system. To increase the efficiency the air conditioning system desiccant materials are used at the inlet of the air conditioning test rig. Desiccant materials attract moisture based on differences in vapor pressure. Due to their enormous affinity to absorb water and considerable ability to hold water. Due to use of desiccant material load on the cooling coil reduces since moisture is absorbed by desiccant; cooling coil has to take only sensible load. Analysis is done using different desiccant materials and based on the observation, power consumption before and after desiccant is calculated. From this conclusion is made that desiccant material improves the efficiency of air conditioning test rig

  8. Performance evaluation of natural draft based agricultural residues charcoal system

    Energy Technology Data Exchange (ETDEWEB)

    Patil, K.N.; Ramana, P.V.; Singh, R.N. [Sardar Patel Renewable Energy Research Inst., Gujarat (India)

    2000-07-01

    A natural draft based agricultural residues charcoal reactor has been described herein along with its performance details. Instead of releasing pyrogases into the atmosphere, these gases are burnt inside the charcoal reactor, offering better energy efficiency and environmental acceptability. Agricultural residues like arhar stalks (Cajanus cajan), saw mill woody waste, Ipomoea (Ipomoea fistulasa, Syn. Ipomoea Carnea) and babul wood (Acacia nilotica), all sun dried, were used as the feedstocks for charcoal making. Saleable charcoal (SC) yield was in the range of 28 to 47% dry basis (db) with the maximum from saw mill woody waste and the minimum from Ipomoea. Fixed carbon (FC) content in the SC varies from 69 to 77% (db) in the agricultural residues based charcoal. Babul wood charring gave the highest SC yield (50%, db) and the best quality charcoal in terms of FC (80%, db). Economic analysis revealed that if the system developed was operated annually for 4000 h, the user could have a net profit of around Rs.l,00,000/-(US $2500). (author)

  9. Evaluating performances of simplified physically based models for landslide susceptibility

    Directory of Open Access Journals (Sweden)

    G. Formetta

    2015-12-01

    Full Text Available Rainfall induced shallow landslides cause loss of life and significant damages involving private and public properties, transportation system, etc. Prediction of shallow landslides susceptible locations is a complex task that involves many disciplines: hydrology, geotechnical science, geomorphology, and statistics. Usually to accomplish this task two main approaches are used: statistical or physically based model. Reliable models' applications involve: automatic parameters calibration, objective quantification of the quality of susceptibility maps, model sensitivity analysis. This paper presents a methodology to systemically and objectively calibrate, verify and compare different models and different models performances indicators in order to individuate and eventually select the models whose behaviors are more reliable for a certain case study. The procedure was implemented in package of models for landslide susceptibility analysis and integrated in the NewAge-JGrass hydrological model. The package includes three simplified physically based models for landslides susceptibility analysis (M1, M2, and M3 and a component for models verifications. It computes eight goodness of fit indices by comparing pixel-by-pixel model results and measurements data. Moreover, the package integration in NewAge-JGrass allows the use of other components such as geographic information system tools to manage inputs-output processes, and automatic calibration algorithms to estimate model parameters. The system was applied for a case study in Calabria (Italy along the Salerno-Reggio Calabria highway, between Cosenza and Altilia municipality. The analysis provided that among all the optimized indices and all the three models, the optimization of the index distance to perfect classification in the receiver operating characteristic plane (D2PC coupled with model M3 is the best modeling solution for our test case.

  10. Evaluating performances of simplified physically based models for landslide susceptibility

    Science.gov (United States)

    Formetta, G.; Capparelli, G.; Versace, P.

    2015-12-01

    Rainfall induced shallow landslides cause loss of life and significant damages involving private and public properties, transportation system, etc. Prediction of shallow landslides susceptible locations is a complex task that involves many disciplines: hydrology, geotechnical science, geomorphology, and statistics. Usually to accomplish this task two main approaches are used: statistical or physically based model. Reliable models' applications involve: automatic parameters calibration, objective quantification of the quality of susceptibility maps, model sensitivity analysis. This paper presents a methodology to systemically and objectively calibrate, verify and compare different models and different models performances indicators in order to individuate and eventually select the models whose behaviors are more reliable for a certain case study. The procedure was implemented in package of models for landslide susceptibility analysis and integrated in the NewAge-JGrass hydrological model. The package includes three simplified physically based models for landslides susceptibility analysis (M1, M2, and M3) and a component for models verifications. It computes eight goodness of fit indices by comparing pixel-by-pixel model results and measurements data. Moreover, the package integration in NewAge-JGrass allows the use of other components such as geographic information system tools to manage inputs-output processes, and automatic calibration algorithms to estimate model parameters. The system was applied for a case study in Calabria (Italy) along the Salerno-Reggio Calabria highway, between Cosenza and Altilia municipality. The analysis provided that among all the optimized indices and all the three models, the optimization of the index distance to perfect classification in the receiver operating characteristic plane (D2PC) coupled with model M3 is the best modeling solution for our test case.

  11. Evaluation of Liquefaction Return Period for Bangalore Based on Standard Penetration Test Data: Performance Based Approach

    Directory of Open Access Journals (Sweden)

    K. S. Vipin

    2009-01-01

    Full Text Available Problem statement: The conventional liquefaction evaluation is based on a deterministic approach. However in this method the uncertainty in the earthquake loading is not properly taken into account. However recent research in this field indicates that this uncertainty in the earthquake loading has to be considered in the liquefaction potential evaluation. Moreover the evaluation of liquefaction return period is not possible in the conventional deterministic methods. This study explained the methods for evaluating the probability of liquefaction and the return period of liquefaction based on probabilistic approach. Approach: In this study the geotechnical data was collected from 450 bore holes in Bangalore, India, covering an area of 220 km2. The seismic hazard analysis for the study area is carried out using Probabilistic Seismic Hazard Analysis (PSHA and the peak acceleration at ground surface was evaluated for site class-D after considering local site effects. For assessment of site class, shear wave velocity profiles in the city had been obtained using Multichannel Analysis of Surface Waves (MASW survey. Based on this data the probabilistic liquefaction analysis was done to evaluate the probability of liquefaction in the study area. Based on the performance based approach the liquefaction return period for the study area was also evaluated. Results: The results showed the variation of liquefaction susceptibility for the study area. The corrected standard penetration values required to prevent the liquefaction for return periods of 475 and 2500 years were also presented here. Conclusion/Recommendations: The spatial variation of probability of liquefaction and the factor of safety against liquefaction evaluated using the two methods match well for the study area.

  12. Performance Evaluation of Palm Oil-Based Biodiesel Combustion in an Oil Burner

    OpenAIRE

    Abdolsaeid Ganjehkaviri; Mohammad Nazri Mohd Jaafar; Seyed Ehsan Hosseini; Anas Basri Musthafa

    2016-01-01

    This paper presents an experimental investigation of the combustion characteristics of palm methyl ester (PME), also known as palm oil-based biodiesel, in an oil burner system. The performance of conventional diesel fuel (CDF) and various percentages of diesel blended with palm oil-based biodiesel is also studied to evaluate their performance. The performance of the various fuels is evaluated based on the temperature profile of the combustor’s wall and emissions, such as nitrogen oxides (NOx)...

  13. Performance evaluation of image-based location recognition approaches based on large-scale UAV imagery

    Science.gov (United States)

    Hesse, Nikolas; Bodensteiner, Christoph; Arens, Michael

    2014-10-01

    Recognizing the location where an image was taken, solely based on visual content, is an important problem in computer vision, robotics and remote sensing. This paper evaluates the performance of standard approaches for location recognition when applied to large-scale aerial imagery in both electro-optical (EO) and infrared (IR) domains. We present guidelines towards optimizing the performance and explore how well a standard location recognition system is suited to handle IR data. We show on three datasets that the performance of the system strongly increases if SIFT descriptors computed on Hessian-Affine regions are used instead of SURF features. Applications are widespread and include vision-based navigation, precise object geo-referencing or mapping.

  14. Prognostics Performance Evaluation

    Data.gov (United States)

    National Aeronautics and Space Administration — This is the first version of the performance evaluation tool. Evaluation is based on point estimates of the RUL predictions. a more detailed documentation will be...

  15. Performance evaluation of algorithms for SAW-based temperature measurement.

    Science.gov (United States)

    Schuster, Stefan; Scheiblhofer, Stefan; Reindl, Leonhard; Stelzer, Andreas

    2006-06-01

    Whenever harsh environmental conditions such as high temperatures, accelerations, radiation, etc., prohibit usage of standard temperature sensors, surface acoustic wave-based temperature sensors are the first choice for highly reliable wireless temperature measurement. Interrogation of these sensors is often based on frequency modulated or frequency stepped continuous wave-based radars (FMCW/FSCW). We investigate known algorithms regarding their achievable temperature accuracy and their applicability in practice. Furthermore, some general rules of thumb for FMCW/FSCW radar-based range estimation by means of the Cramer-Rao lower bound (CRLB) for frequency and phase estimation are provided. The theoretical results are verified on both simulated and measured data. PMID:16846150

  16. Research on Performance Evaluation of Integrates with Agriculture Food Base and Supermarket

    Directory of Open Access Journals (Sweden)

    Yongqiang Chen

    2015-02-01

    Full Text Available Performance evaluation of integrate with agriculture food base and supermarket is a research hotspot and difficulty in the theory and practice research of agriculture super-docking mode. The study presents an evaluation indicator system and a fuzzy neural network evaluation algorithm for evaluating performance of integrates with agriculture food base and supermarket. Firstly, a performance evaluation indicator system is designed through analyzing the similarities of general performance evaluation and the specialties of the evaluation of integrates with agriculture food base and supermarket; Secondly, the study integrates the advantages of fuzzy evaluation methods and BP neural network evaluation methods, designs a new algorithm structure, selects different learning methods and analyzes the algorithm performance, then presents a new fuzzy neural network evaluation algorithm; Finally, three integrates are taken for experimental examples and the results illustrate that the improved algorithm can be used for evaluating the performance of integrates with agriculture food base and supermarket feasibly and effectively and can provide reference for evaluating other complex systems.

  17. Performance-based evaluation of commercial-grade items

    International Nuclear Information System (INIS)

    For the last decade, regulatory expectations for the procurement process for nuclear safety-related commercial-grade items (CGIs) have increased. These changes are driven by US Nuclear Regulatory Commission (NRC) concern for fraudulent or misrepresented parts and significant marketplace changes. The industry responded to these concerns by developing improved procurement programs that changed the detail to which parts were specified and received and provided for verification of attributes that were critical to successful performance of safety-related function(s). Like its counterparts, Duquesne Light Company (DLCo) began applying enhanced program requirements to procurements initiated after September 1, 1989, in order to meet the industry's January 1, 1990, commitment

  18. Evaluating Teacher Performance Fairly.

    Science.gov (United States)

    Sportsman, Michel Allain

    1986-01-01

    Describes foundation and development of a performance-based teacher evaluation method developed in Missouri which makes mastery learning the basis for outcomes of instruction. Eight discrete parts of the teaching act characterizing successful teaching, four criteria important in performance-based evaluation development, and four definable phases…

  19. PERFORMANCE EVALUATION OF CONTENT BASED IMAGE RETRIEVAL FOR MEDICAL IMAGES

    Directory of Open Access Journals (Sweden)

    SASI KUMAR. M

    2013-04-01

    Full Text Available Content-based image retrieval (CBIR technology benefits not only large image collections management, but also helps clinical care, biomedical research, and education. Digital images are found in X-Rays, MRI, CT which are used for diagnosing and planning treatment schedules. Thus, visual information management is challenging as the data quantity available is huge. Currently, available medical databases utilization is limited image retrieval issues. Archived digital medical images retrieval is always challenging and this is being researched more as images are of great importance in patient diagnosis, therapy, medical reference, and medical training. In this paper, an image matching scheme using Discrete Sine Transform for relevant feature extraction is presented. The efficiency of different algorithm for classifying the features to retrieve medical images is investigated.

  20. Reliability and performance evaluation of systems containing embedded rule-based expert systems

    Science.gov (United States)

    Beaton, Robert M.; Adams, Milton B.; Harrison, James V. A.

    1989-01-01

    A method for evaluating the reliability of real-time systems containing embedded rule-based expert systems is proposed and investigated. It is a three stage technique that addresses the impact of knowledge-base uncertainties on the performance of expert systems. In the first stage, a Markov reliability model of the system is developed which identifies the key performance parameters of the expert system. In the second stage, the evaluation method is used to determine the values of the expert system's key performance parameters. The performance parameters can be evaluated directly by using a probabilistic model of uncertainties in the knowledge-base or by using sensitivity analyses. In the third and final state, the performance parameters of the expert system are combined with performance parameters for other system components and subsystems to evaluate the reliability and performance of the complete system. The evaluation method is demonstrated in the context of a simple expert system used to supervise the performances of an FDI algorithm associated with an aircraft longitudinal flight-control system.

  1. Performance Evaluation of Enterprise Knowledge Management based on Multiple Attribute Group Decision Making

    Institute of Scientific and Technical Information of China (English)

    LIU Yan-chi; GUO Hong-wei

    2009-01-01

    Given that the classical performance evaluation models can not deal with the group decision making problems since they simply average the index, we propose an enterprise knowledge management evaluation model based on multiple attribute group decision making (MAGDM). Find the differences between Ordered Weighted Averaging (OWA) and meth- ods for uncertain decision making. Also, analyze the multiple attribute group decision making process and implement the al. gorithm. Finally, apply the method on performance evaluation of four enterprises and make sensitivity analysis towards the evaluation results.

  2. Performance evaluation of Al-Zahra academic medical center based on Iran balanced scorecard model

    OpenAIRE

    Raeisi, Ahmad Reza; Yarmohammadian, Mohammad Hossein; Bakhsh, Roghayeh Mohammadi; Gangi, Hamid

    2012-01-01

    Background: Growth and development in any country's national health system, without an efficient evaluation system, lacks the basic concepts and tools necessary for fulfilling the system's goals. The balanced scorecard (BSC) is a technique widely used to measure the performance of an organization. The basic core of the BSC is guided by the organization's vision and strategies, which are the bases for the formation of four perspectives of BSC. The goal of this research is the performance evalu...

  3. Fuzzy logic based sensor performance evaluation of vehicle mounted metal detector systems

    Science.gov (United States)

    Abeynayake, Canicious; Tran, Minh D.

    2015-05-01

    Vehicle Mounted Metal Detector (VMMD) systems are widely used for detection of threat objects in humanitarian demining and military route clearance scenarios. Due to the diverse nature of such operational conditions, operational use of VMMD without a proper understanding of its capability boundaries may lead to heavy causalities. Multi-criteria fitness evaluations are crucial for determining capability boundaries of any sensor-based demining equipment. Evaluation of sensor based military equipment is a multi-disciplinary topic combining the efforts of researchers, operators, managers and commanders having different professional backgrounds and knowledge profiles. Information acquired through field tests usually involves uncertainty, vagueness and imprecision due to variations in test and evaluation conditions during a single test or series of tests. This report presents a fuzzy logic based methodology for experimental data analysis and performance evaluation of VMMD. This data evaluation methodology has been developed to evaluate sensor performance by consolidating expert knowledge with experimental data. A case study is presented by implementing the proposed data analysis framework in a VMMD evaluation scenario. The results of this analysis confirm accuracy, practicability and reliability of the fuzzy logic based sensor performance evaluation framework.

  4. Research on Supply Chain Performance Evaluation of Fresh Agriculture Products Based on BP Neural Network

    Directory of Open Access Journals (Sweden)

    Hankun Ye

    2014-05-01

    Full Text Available Evaluating supply chain performance of fresh agricultural products is one of the key techniques and a research hotspot in supply chain management and in fields related. The paper designs a new evaluation indicator system and presents a new model for evaluating supply chain performance of fresh agriculture product companies. First, based on analyzing the specific characteristics of the supply chain performance evaluation of fresh agriculture products, the paper designs a new evaluation indicator system including external and internal performance. Second, some improvements, such as adjusting dynamic strategy and the value of momentum factor, are taken to speed up calculation convergence and simplify the structure and to improve evaluating accuracy of the original BP evaluation model. Finally the model is realized with the data from certain supply chains of three fresh agriculture product companies and the experimental results show that the algorithm can improve calculation efficiency and evaluation accuracy when used for supply chain performance evaluation of fresh agriculture product companies practically.

  5. Evaluation of Liquefaction Return Period for Bangalore Based on Standard Penetration Test Data: Performance Based Approach

    OpenAIRE

    Vipin, K. S.; Sitharam, T. G.

    2009-01-01

    Problem statement: The conventional liquefaction evaluation is based on a deterministic approach. However in this method the uncertainty in the earthquake loading is not properly taken into account. However recent research in this field indicates that this uncertainty in the earthquake loading has to be considered in the liquefaction potential evaluation. Moreover the evaluation of liquefaction return period is not possible in the conventional deterministic methods. This study explained the m...

  6. Mergers in Greece: evaluation of the merger related performance of greek companies, accounting based methodology

    OpenAIRE

    Ζούτσου, Ρούλα

    2001-01-01

    This paper evaluates the financial results of 23 Greek merger transactions that were completed between 1993 and 1998 using the accounting based methodology. A set of 20 performance ratios is examined for a period of 5 years to get an indication of the mean weighted industry- adjusted performance difference between the pre- to post-merger period. Additionally, a cross-sectional analysis is performed to conclude on whether special characteristics of the merger participants are associated with i...

  7. PERFORMANCE EVALUATION METHOD FOR BUSINESS PROCESS OF MACHINERY MANUFACTURER BASED ON DEA/AHP HYBRID MODEL

    Institute of Scientific and Technical Information of China (English)

    WANG Ting; YI Shuping; YANG Yuanzhao

    2007-01-01

    A set of indices for performance evaluation for business processes with multiple inputs and multiple outputs is proposed, which are found in machinery manufacturers. Based on the traditional methods of data envelopment analysis (DEA) and analytical hierarchical process (AHP), a hybrid model called DEA/AHP model is proposed to deal with the evaluation of business process performance. With the proposed method, the DEA is firstly used to develop a pairwise comparison matrix, and then the AHP is applied to evaluate the performance of business process using the pairwise comparison matrix. The significant advantage of this hybrid model is the use of objective data instead of subjective human judgment for performance evaluation. In the case study, a project of business process reengineering (BPR) with a hydraulic machinery manufacturer is used to demonstrate the effectiveness of the DEA/AHP model.

  8. Performance evaluation of fuzzy and BPN based congestion controller in WSN

    Directory of Open Access Journals (Sweden)

    Rekha Chakravarthi

    2015-04-01

    Full Text Available In a Wireless Sensor Network when an event is detected, the network traffic increases. It in turn increases the flow of data packets and congestion. Congestion in Wireless Sensor Network plays a vital role in degrading the performance of the network. Hence it necessitates, developing a novel technique to control congestion. In this paper, soft computing based congestion control technique is proposed. Fuzzy logic and neural network are the soft computing tools used for estimating the packet drop. The performance of the proposed technique is evaluated using Accuracy. From the results, it is proved that neural network based congestion control technique provides better results than fuzzy based congestion control technique.

  9. Performance Evaluation for DFB and VCSEL-based 60 GHz Radio-over-Fiber System

    DEFF Research Database (Denmark)

    Pang, Xiaodan; Lebedev, Alexander; Vegas Olmos, Juan José;

    2013-01-01

    In this paper, we report on a detailed analysis and performance comparison work between 60 GHz radio-over-fiber systems based on a DFB laser and a C-band VCSEL. Coherent photonic up-conversion method is applied for the 60 GHz millimeter-wave signal generation. The generated signals are evaluated...

  10. Statewide Strategic Forest Resource Planning Programs: Evaluation Based on Context, Process, Outputs, and Performance.

    Science.gov (United States)

    Gray, Gerald J.; Ellefson, Paul V.

    1991-01-01

    Evaluation of strategic planning programs is illustrated using the examples of statewide forest resource planning programs implemented by state governments in 1986. Client-based perspectives were studied via a survey of 216 officials affected by the forestry planning program. Considering planning's context, process, outputs, and performance helped…

  11. Performance Evaluation of Extension Education Centers in Universities Based on the Balanced Scorecard

    Science.gov (United States)

    Wu, Hung-Yi; Lin, Yi-Kuei; Chang, Chi-Hsiang

    2011-01-01

    This study aims at developing a set of appropriate performance evaluation indices mainly based on balanced scorecard (BSC) for extension education centers in universities by utilizing multiple criteria decision making (MCDM). Through literature reviews and experts who have real practical experiences in extension education, adequate performance…

  12. Performance Evaluation of Bidding-Based Multi-Agent Scheduling Algorithms for Manufacturing Systems

    Directory of Open Access Journals (Sweden)

    Antonio Gordillo

    2014-10-01

    Full Text Available Artificial Intelligence techniques have being applied to many problems in manufacturing systems in recent years. In the specific field of manufacturing scheduling many studies have been published trying to cope with the complexity of the manufacturing environment. One of the most utilized approaches is (multi agent-based scheduling. Nevertheless, despite the large list of studies reported in this field, there is no resource or scientific study on the performance measure of this type of approach under very common and critical execution situations. This paper focuses on multi-agent systems (MAS based algorithms for task allocation, particularly in manufacturing applications. The goal is to provide a mechanism to measure the performance of agent-based scheduling approaches for manufacturing systems under key critical situations such as: dynamic environment, rescheduling, and priority change. With this mechanism it will be possible to simulate critical situations and to stress the system in order to measure the performance of a given agent-based scheduling method. The proposed mechanism is a pioneering approach for performance evaluation of bidding-based MAS approaches for manufacturing scheduling. The proposed method and evaluation methodology can be used to run tests in different manufacturing floors since it is independent of the workshop configuration. Moreover, the evaluation results presented in this paper show the key factors and scenarios that most affect the market-like MAS approaches for manufacturing scheduling.

  13. Research on Amplifier Performance Evaluation Based on δ-Support Vector Regression

    Directory of Open Access Journals (Sweden)

    Xing Huo

    2014-01-01

    Full Text Available Focusing on the amplifier performance evaluation demand, a novel evaluation strategy based on δ-support vector regression (δ-SVR is proposed in this paper. Lower computer calculation demand is considered firstly. And this is dealt with by the superiority of δ-SVR which can be significantly improved on the number of support vectors. Moreover, the function of δ-SVR employs the modified RBF kernel function which is constructed from an original kernel by removing the last coordinate and adding the linear term with the last coordinate. Experiment adopted the typical circuit Sallen-Key low pass filter to prove the proposed evaluation strategy via the eight performance indexes. Simulation results reveal that the need of the number of δ-SVR support vectors is the lowest among the other two methods LSSVR and ε-SVR under obtaining nearly the same evaluation result. And this is also suitable for promotion computational speed.

  14. Performance Evaluation of Received Signal Strength Based Hard Handover for UTRAN LTE

    DEFF Research Database (Denmark)

    Anas, Mohmmad; Calabrese, Francesco Davide; Mogensen, Preben;

    2007-01-01

    This paper evaluates the hard handover performance for UTRAN LTE system. The focus is on the impact that received signal strength based hard handover algorithm have on the system performance measured in terms of number of handovers, time between two consecutive handovers and uplink SINR for a user...... about to experience a handover. A handover algorithm based on received signal strength measurements has been designed and implemented in a dynamic system level simulator and has been studied for different parameter sets in a 3GPP UTRAN LTE recommended simulation scenario. The results suggest...

  15. Performance Evaluation of K-Mean and Fuzzy C-Mean Image Segmentation Based Clustering Classifier

    Directory of Open Access Journals (Sweden)

    Hind R.M Shaaban

    2015-12-01

    Full Text Available This paper presents Evaluation K-mean and Fuzzy c-mean image segmentation based Clustering classifier. It was followed by thresholding and level set segmentation stages to provide accurate region segment. The proposed stay can get the benefits of the K-means clustering. The performance and evaluation of the given image segmentation approach were evaluated by comparing K-mean and Fuzzy c-mean algorithms in case of accuracy, processing time, Clustering classifier, and Features and accurate performance results. The database consists of 40 images executed by K-mean and Fuzzy c-mean image segmentation based Clustering classifier. The experimental results confirm the effectiveness of the proposed Fuzzy c-mean image segmentation based Clustering classifier. The statistical significance Measures of mean values of Peak signal-to-noise ratio (PSNR and Mean Square Error (MSE and discrepancy are used for Performance Evaluation of K-mean and Fuzzy c-mean image segmentation. The algorithm’s higher accuracy can be found by the increasing number of classified clusters and with Fuzzy c-mean image segmentation.

  16. A Framework For Performance Evaluation Of ASIPs in Network-Based IDS

    Directory of Open Access Journals (Sweden)

    Majid Nezakatolhoseini

    2012-10-01

    Full Text Available Nowadays efficient usage of high-tech security tools and appliances is considered as an importantcriterion for security improvement of computer networks. Based on this assumption, Intrusion Detectionand Prevention Systems (IDPS have key role for applying the defense in depth strategy. In this situation,by increasing network bandwidth in addition to increasing number of threats, Network-based IDPSeshave been faced with performance challenge for processing of huge traffic in the networks. A generalsolution for this bottleneck is exploitation of efficient hardware architectures for performanceimprovement of IDPS. In this paper a framework for analysis and performance evaluation of applicationspecific instruction set processors is presented for usage in application of attack detection in NetworkbasedIntrusion Detection Systems(NIDS. By running this framework as a security application on V850,OR1K, MIPS32, ARM7TDMI and PowerPC32 microprocessors, their performance has been evaluatedand analyzed. For performance improvement, the compiler optimization levels are employed and at theend; base on O2 optimization level a new combination of optimization flags is presented. The experimentsshow that the framework results 18.10% performance improvements for pattern matching on ARM7TDMImicroprocessors.

  17. Content-based image retrieval system for solid waste bin level detection and performance evaluation.

    Science.gov (United States)

    Hannan, M A; Arebey, M; Begum, R A; Basri, Hassan; Al Mamun, Md Abdulla

    2016-04-01

    This paper presents a CBIR system to investigate the use of image retrieval with an extracted texture from the image of a bin to detect the bin level. Various similarity distances like Euclidean, Bhattacharyya, Chi-squared, Cosine, and EMD are used with the CBIR system for calculating and comparing the distance between a query image and the images in a database to obtain the highest performance. In this study, the performance metrics is based on two quantitative evaluation criteria. The first one is the average retrieval rate based on the precision-recall graph and the second is the use of F1 measure which is the weighted harmonic mean of precision and recall. In case of feature extraction, texture is used as an image feature for bin level detection system. Various experiments are conducted with different features extraction techniques like Gabor wavelet filter, gray level co-occurrence matrix (GLCM), and gray level aura matrix (GLAM) to identify the level of the bin and its surrounding area. Intensive tests are conducted among 250 bin images to assess the accuracy of the proposed feature extraction techniques. The average retrieval rate is used to evaluate the performance of the retrieval system. The result shows that, the EMD distance achieved high accuracy and provides better performance than the other distances. PMID:26868844

  18. Performance Evaluation of Palm Oil-Based Biodiesel Combustion in an Oil Burner

    Directory of Open Access Journals (Sweden)

    Abdolsaeid Ganjehkaviri

    2016-02-01

    Full Text Available This paper presents an experimental investigation of the combustion characteristics of palm methyl ester (PME, also known as palm oil-based biodiesel, in an oil burner system. The performance of conventional diesel fuel (CDF and various percentages of diesel blended with palm oil-based biodiesel is also studied to evaluate their performance. The performance of the various fuels is evaluated based on the temperature profile of the combustor’s wall and emissions, such as nitrogen oxides (NOx and carbon monoxide (CO. The combustion experiments were conducted using three different oil burner nozzles (1.25, 1.50 and 1.75 USgal/h under lean (equivalence ratio (Φ = 0.8, stoichiometric (Φ = 1 and rich fuel (Φ = 1.2 ratio conditions. The results show that the rate of emission formation decreases as the volume percent of palm biodiesel in a blend increases. PME combustion tests present a lower temperature inside the chamber compared to CDF combustion. High rates of NOx formation occur under lean mixture conditions with the presence of high nitrogen and sufficient temperature, whereas high CO occurs for rich mixtures with low oxygen presence.

  19. ANN based Performance Evaluation of BDI for Condition Monitoring of Induction Motor Bearings

    Science.gov (United States)

    Patel, Raj Kumar; Giri, V. K.

    2016-07-01

    One of the critical parts in rotating machines is bearings and most of the failure arises from the defective bearings. Bearing failure leads to failure of a machine and the unpredicted productivity loss in the performance. Therefore, bearing fault detection and prognosis is an integral part of the preventive maintenance procedures. In this paper vibration signal for four conditions of a deep groove ball bearing; normal (N), inner race defect (IRD), ball defect (BD) and outer race defect (ORD) were acquired from a customized bearing test rig, under four different conditions and three different fault sizes. Two approaches have been opted for statistical feature extraction from the vibration signal. In the first approach, raw signal is used for statistical feature extraction and in the second approach statistical features extracted are based on bearing damage index (BDI). The proposed BDI technique uses wavelet packet node energy coefficients analysis method. Both the features are used as inputs to an ANN classifier to evaluate its performance. A comparison of ANN performance is made based on raw vibration data and data chosen by using BDI. The ANN performance has been found to be fairly higher when BDI based signals were used as inputs to the classifier.

  20. Wind farms providing secondary frequency regulation: Evaluating the performance of model-based receding horizon control

    Science.gov (United States)

    Shapiro, Carl R.; Meyers, Johan; Meneveau, Charles; Gayme, Dennice F.

    2016-09-01

    We investigate the use of wind farms to provide secondary frequency regulation for a power grid. Our approach uses model-based receding horizon control of a wind farm that is tested using a large eddy simulation (LES) framework. In order to enable real-time implementation, the control actions are computed based on a time-varying one-dimensional wake model. This model describes wake advection and interactions, both of which play an important role in wind farm power production. This controller is implemented in an LES model of an 84-turbine wind farm represented by actuator disk turbine models. Differences between the velocities at each turbine predicted by the wake model and measured in LES are used for closed-loop feedback. The controller is tested on two types of regulation signals, “RegA” and “RegD”, obtained from PJM, an independent system operator in the eastern United States. Composite performance scores, which are used by PJM to qualify plants for regulation, are used to evaluate the performance of the controlled wind farm. Our results demonstrate that the controlled wind farm consistently performs well, passing the qualification threshold for all fastacting RegD signals. For the RegA signal, which changes over slower time scales, the controlled wind farm's average performance surpasses the threshold, but further work is needed to enable the controlled system to achieve qualifying performance all of the time.

  1. Performance Based Evaluation of Concrete Strength under Various Curing Conditions to Investigate Climate Change Effects

    Directory of Open Access Journals (Sweden)

    Tae-Kyun Kim

    2015-07-01

    Full Text Available Recently, the manifestation of global warming-induced climate change has been observed through super typhoons, heavy snowfalls, torrential rains, and extended heat waves. These climate changes have been occurring all over the world and natural disasters have caused severe damage and deterioration of concrete structures and infrastructure. In an effort to deal with these problems due to extreme and abnormal climate changes, studies have been conducted to develop construction technologies and design guidelines. Nevertheless, study results applicable to construction sites continue to be ineffective and insufficient. Therefore, this study proposes ways to cope with climate change by considering the effect of concrete curing condition variations on concrete material performance. More specifically, the 3-, 7- and 28-day compressive and split tensile strength properties of concrete mix cured under various climatic factors including temperature, relative humidity, wind speed, and sunlight exposure time were evaluated to determine whether the concrete meets the current design requirements. Thereafter, a performance based evaluation (PBE was performed using satisfaction probabilities based on the test values to understand the problems associated with the current mix proportion design practice and to identify countermeasures to deal with climate change-induced curing conditions.

  2. Performance-Based Evaluation of Large Steel-Framed Structures in the Overall Fire Process

    Directory of Open Access Journals (Sweden)

    Guoqing Zhu

    2014-01-01

    Full Text Available This paper proposes a systematic analysis of fire hazards within an oversized steel-framed building that is taller and wider than usual, using a performance-based approach. We put forth both the method and the performance criteria for performance-based fire design of oversized steel-framed buildings and quantitatively evaluate the hazard factors (smoke temperature, smoke visibility, smoke toxicity, and structural collapse in fire condition. FDS large eddy simulation and a modified temperature rise model of oversized steel structures were proposed for the quantitative analysis of hazard factors. Furthermore, we also studied evacuation process from oversized buildings and found that the Pathfinder model (developed based on water conservation model and behavior model can accurately predict the evacuation process from oversized buildings based on our experimental study of an evacuation from a stadium. By comparing the time of occurrence of fire hazard factors (smoke temperature, smoke visibility, smoke toxicity, and structural collapse and the time needed for safe evacuation, we could conduct a quantitative fire risk assessment on personal evacuation. And the time of occurrence of fire hazard factors can also provide a theoretical reference for emergency rescuers.

  3. Novel approaches to improve iris recognition system performance based on local quality evaluation and feature fusion.

    Science.gov (United States)

    Chen, Ying; Liu, Yuanning; Zhu, Xiaodong; Chen, Huiling; He, Fei; Pang, Yutong

    2014-01-01

    For building a new iris template, this paper proposes a strategy to fuse different portions of iris based on machine learning method to evaluate local quality of iris. There are three novelties compared to previous work. Firstly, the normalized segmented iris is divided into multitracks and then each track is estimated individually to analyze the recognition accuracy rate (RAR). Secondly, six local quality evaluation parameters are adopted to analyze texture information of each track. Besides, particle swarm optimization (PSO) is employed to get the weights of these evaluation parameters and corresponding weighted coefficients of different tracks. Finally, all tracks' information is fused according to the weights of different tracks. The experimental results based on subsets of three public and one private iris image databases demonstrate three contributions of this paper. (1) Our experimental results prove that partial iris image cannot completely replace the entire iris image for iris recognition system in several ways. (2) The proposed quality evaluation algorithm is a self-adaptive algorithm, and it can automatically optimize the parameters according to iris image samples' own characteristics. (3) Our feature information fusion strategy can effectively improve the performance of iris recognition system. PMID:24693243

  4. AN INTERWORKING IMPLEMENTATION AND PERFORMANCE EVALUATION IN IEEE 802.11S BASED CAMPUS MESH NETWORKS

    Directory of Open Access Journals (Sweden)

    G.MERLIN SHEEBA

    2013-02-01

    Full Text Available To address deployment schemes over large dispersed geographical area a paradigm shift in the technology was needed. Wireless Mesh Networks (WMN has emerged as a promising technology to such challenging tasks. As wireless network grows it puts an increased demands in infrastructure based networks.802.11s based WMN is a concrete step that address this paradox to make infrastructure itself wireless. As there is a high demand of internet usage and revolution in computer technology in university campuses, we have done a survey among the students on usage of WiFi based communications and henceforth modeled and implemented an interworking Campus Mesh Wi-Fi Network and have evaluated the networks performance.

  5. A QUESTIONNAIRE BASED STUDY TO EVALUATE PERFORMANCE OF A CME PROGRAMME BY THE PARTICIPANTS

    Directory of Open Access Journals (Sweden)

    Jain

    2013-02-01

    Full Text Available ABSTRACT: INTRODUCTION: Performance evaluation of any learning – teaching a ctivity by the students is routine exercise at most of the interna tional institutions for higher education. Some speakers prefer to evaluate their own skills by givin g pre-designed set of questions to the prospective participants for their own record and furth er improvement. Here, we have tried to evaluate overall performance of a CME programme as co nceived by the participants. The reasons for doing so were many folds. Firstly, the topic of CME was out of context to medical curriculum and it was sensitive too. Secondly, ther e were no incentives for the participants to attend the programme other than CME theme i.e. no MM C credit hours, no gifts, no food but only a certificate of participation. Lastly, during the planning of CME programme, doubts were expressed by some of the college authorities as rega rd to success of CME. All these prompted us to seek first hand information from the participants regarding their views on CME topic, speakers and academic content. MATERIAL & METHODS: This was a questionnaire based evaluation. All three resident doctors under the gu idance of CME faculty prepared a set of questions to evaluate CME performance in respect of the topic, the speakers and overall assessment of entire activity. The questions were pr epared accordingly and pilot tested in some volunteers. Each question had five options ranging f rom strongly agreed to strongly disagree. Result was expressed in term of percentage response in either ‘agree’ or ‘disagree category’. RESULTS: The response of participants to CME activity was une xpectedly overwhelming. Almost, 85 to 95% of participants liked the topic. All the speakers were highly appreciated for their presentation and knowledge. Nearly 95% of the participants opined favourably to overall success of CME. CONCLUSIONS: From the results, it can be concluded that there wa s overwhelming response from the

  6. Preliminary Performance Evaluation of MEMS-based Piezoelectric Energy Harvesters in Extended Temperature Range

    DEFF Research Database (Denmark)

    Xu, R.; Borregaard, L.M.; Lei, A.;

    2012-01-01

    In this work a batch of MEMS-based vibration energy harvesters consisting of a silicon/PZT thick film ntilever with integrated proof mass is characterized. The purpose of a vibration energy harvester is to convert low grade vibrations to useful electrical power. Optimally, the natural frequency...... of the harvester should match the frequency of he ambient vibration. The first step to achieve this is to evaluate the uniformity of the fabricated harvesters and nderstand the effects of temperature on the harvesters during operation. Therefore, the uniformity of 40 energy harvesters from one wafer has been...... evaluated. Thereafter the performance of the energy harvesters operating at emperatures between -30°C to 100°C was measured....

  7. Comparative Performance Evaluation of Large FPGAs with CNFET-and CMOS-based Switches in Nanoscale

    Institute of Scientific and Technical Information of China (English)

    Mohammad Hossein Moaiyeri; Ali Jahaniana; Keivan Navi

    2011-01-01

    Routing resources are the major bottlenecks in improving the performance and power consumption of the current FPGAs. Recently reported researches have shown that carbon nanotube field effect transistors (CNFETs) have considerable potentials for improving the delay and power consumption of the modern FP-GAs. In this paper, hybrid CNFET-CMOS architecture is presented for FPGAs and then this architecture is evaluated to be used in modern FPGAs. In addition, we have designed and parameterized the CNFET-based FPGA switches and calibrated them for being utilized in FPGAs at 45 nm, 22 nm and 16 nm technology nodes. Simulation results show that the CNFET-based FPGA switches improve the current FPGAs in terms of per-formance, power consumption and immunity to process and temperature variations. Simulation results and analyses also demonstrate that the performance of the FPGAs is improved about 30%, on average and the average and leakage power consumptions are reduced more than 6% and 98% respectively when the CNFET switches are used instead of MOSFET FPGA switches. Moreover, this technique leads to more than 20.31%smaller area. It is worth mentioning that the advantages of CNFET-based FPGAs are more considerable when the size of FPGAs grows and also when the technology node becomes smaller.

  8. Experimental performance evaluation of heat pump-based steam supply system

    Science.gov (United States)

    Kaida, T.; Sakuraba, I.; Hashimoto, K.; Hasegawa, H.

    2015-08-01

    Heat pumps have become increasingly important as a technology to reduce primary energy consumption and greenhouse effect gas emission. They are presently used mainly on residential air-conditioning and domestic hot water and are expected to spread to industrial heating processes. In 2011, Kobe Steel, Ltd. developed and commercialized two heat pump- based steam supply systems; the high efficiency steam supply system with a steam temperature of 120°C (SGH120) and the system which enables a steam temperature of 165°C (sGh165). For promoting the spread of these industrial heat pumps and enhancing the reliability of them, we investigate experimentally steam generation rate, energy efficiency and controlled performance of the SGH165 under various operating conditions on the assumption of actual different industrial processes, and evaluate technical possibilities for better performance.

  9. PERFORMANCE EVALUATION FOR DAMPING CONTROLLERS OF POWER SYSTEMS BASED ON MULTI-AGENT MODELS

    Institute of Scientific and Technical Information of China (English)

    Ancheng XUE; Yiguang HONG

    2009-01-01

    This paper proposes a multi-layer multi-agent model for the performance evaluation of power systems, which is different from the existing multi-agent ones. To describe the impact of the structure of the networked power system, .the proposed model consists of three kinds of agents that form three layers: control agents such as the generators and associated controllers, information agents to exchange the information based on the wide area measurement system (WAMS) or transmit control signals to the power system stabilizers (PSSs), and network-node agents such as the generation nodes and load nodes connected with transmission lines. An optimal index is presented to evaluate the performance of damping controllers to the system's inter-area oscillation with respect to the information-layer topology.Then, the authors show that the inter-area information exchange is more powerful than the exchange within a given area to control the inter-area low frequency oscillation based on simulation analysis.

  10. Performance Evaluation of Density-Based Outlier Detection on High Dimensional Data

    Directory of Open Access Journals (Sweden)

    P. Murugavel

    2013-02-01

    Full Text Available Outlier detection is a task that finds objects that are considerably dissimilar, exceptional or inconsistent with respect to the remaining data. Outlier detection has wide applications which include data analysis, financial fraud detection, network intrusion detection and clinical diagnosis of diseases. In data analysis applications, outliers are often considered as error or noise and are removed once detected. Approaches to detect and remove outliers have been studied by several researchers. Density based approaches have been proved to be effective in detecting outliers successfully, but usually requires huge amount of computations. In this paper, two approaches that enhance the traditional density based method for removing outliers are analyzed. The first method uses data partitioning method and usespeed up strategies to avoid large computations. The second method presents a unified clustering and outlier detection using Neighbourhood based Local Density Factor (NLDF. The aim of both the models is to improve the performance of outlier detection, clustering and to speed up the whole process. In this paper, the working of these two papers is studied and a performance evaluation based on clustering efficiency and outlier detection efficiency is presented.

  11. A high-performance spatial database based approach for pathology imaging algorithm evaluation

    Directory of Open Access Journals (Sweden)

    Fusheng Wang

    2013-01-01

    validated data were formatted based on the PAIS data model and loaded into a spatial database. To support efficient data loading, we have implemented a parallel data loading tool that takes advantage of multi-core CPUs to accelerate data injection. The spatial database manages both geometric shapes and image features or classifications, and enables spatial sampling, result comparison, and result aggregation through expressive structured query language (SQL queries with spatial extensions. To provide scalable and efficient query support, we have employed a shared nothing parallel database architecture, which distributes data homogenously across multiple database partitions to take advantage of parallel computation power and implements spatial indexing to achieve high I/O throughput. Results: Our work proposes a high performance, parallel spatial database platform for algorithm validation and comparison. This platform was evaluated by storing, managing, and comparing analysis results from a set of brain tumor whole slide images. The tools we develop are open source and available to download. Conclusions: Pathology image algorithm validation and comparison are essential to iterative algorithm development and refinement. One critical component is the support for queries involving spatial predicates and comparisons. In our work, we develop an efficient data model and parallel database approach to model, normalize, manage and query large volumes of analytical image result data. Our experiments demonstrate that the data partitioning strategy and the grid-based indexing result in good data distribution across database nodes and reduce I/O overhead in spatial join queries through parallel retrieval of relevant data and quick subsetting of datasets. The set of tools in the framework provide a full pipeline to normalize, load, manage and query analytical results for algorithm evaluation.

  12. Performance evaluation of vegetable-based oils in drilling austenitic stainless steel

    DEFF Research Database (Denmark)

    Belluco, Walter; De Chiffre, Leonardo

    2004-01-01

    The efficiency of six cutting oils was evaluated in drilling AISI 316L austenitic stainless steel using conventional HSS-Co tools by measurements of tool life, tool wear, cutting forces and chip formation. Seven tools were tested with each fluid to catastrophic failure. Cutting forces and chip...... breaking were recorded for each bore, and tool wear was measured at constant intervals. A commercial mineral-based oil was taken as reference product, and five vegetable-based cutting fluids at different levels of additivation were tested. All measured parameters were in agreement, confirming...... that a performing fluid produces longer tool life, better chip breaking, lower wear and cutting forces. In particular, good correlation was found between tool life and cutting forces. Differences in cutting forces due to the fluid could be measured with a higher repeatability than tool life, thus resulting...

  13. Performance evaluation of self-breakdown-based single-gap plasma cathode electron gun

    Indian Academy of Sciences (India)

    Niraj Kumar; Nalini Pareek; Udit Narayan Pal; Deepak Kumar Verma; Jitendra Prajapati; Mahesh Kumar; Bharat Lal Meena; Ram Prakash

    2014-06-01

    This paper presents the experimental studies on self-breakdown-based single-gap plasma cathode electron (PCE) gun (5–20 kV/50–160 A) in argon, gas atmosphere and its performance evaluation based on particle-in-cell (PIC) simulation code `OOPIC-Pro’.The PCE-Gun works in conducting phase (low energy, high current) of pseudospark discharge. It produces an intense electron beam, which can propagate more than 200 mm in the drift space region without external magnetic field. The profile of this beam in the drift space region at different breakdown conditions (i.e., gas pressures and applied voltages) has been studied and the experimental results are compared with simulated values. It is demonstrated that ∼30% beam current is lost during the propagation possibly due to space charge neutralization and collisions with neutral particles and walls.

  14. 基于Spirent的Web应用性能评测%Spirent-based Web Application Performance Evaluation

    Institute of Scientific and Technical Information of China (English)

    周鹏; 周海鹰; 左德承; 李韬

    2012-01-01

    分析现有在线事务处理(OLTP)类应用评测方法,提出一种基于Spirent的Web应用性能评测方法.采用平均事务响应时间、待测系统资源利用率和每秒事务数作为主要测试指标,将Web服务器和数据库服务器作为一个整体应用,综合评测OLTP类Web应用的软硬件性能,并快速定位Web应用系统的性能瓶颈.测试结果表明,该方法能将Web应用的系统性能提高40多倍,响应时间降低10多倍.%This paper analyzes existing On Line Transaction Processing(OLTP) test methods, presents a Spirent-based Web application performance evaluation. Web server and database server as a whole and comprehensively evaluates the hardware and software performance of OLTP applications by testing Transaction Response Time(TRT), Resource Utilization(RU) of system and Transaction Per Second(TPS) of Web applications. This method can provide the guideline to chose and buy or design and deploy high performance computers. And it rapidly discovers the performance bottlenecks of a Web application, which can provide guidance for Web application optimization. Test results show the method improves the Web performance by more than 40 times, and reduces the response time by more than 10 times.

  15. Evaluation of the Terminal Sequencing and Spacing System for Performance Based Navigation Arrivals

    Science.gov (United States)

    Thipphavong, Jane; Jung, Jaewoo; Swenson, Harry N.; Martin, Lynne; Lin, Melody; Nguyen, Jimmy

    2013-01-01

    NASA has developed the Terminal Sequencing and Spacing (TSS) system, a suite of advanced arrival management technologies combining timebased scheduling and controller precision spacing tools. TSS is a ground-based controller automation tool that facilitates sequencing and merging arrivals that have both current standard ATC routes and terminal Performance-Based Navigation (PBN) routes, especially during highly congested demand periods. In collaboration with the FAA and MITRE's Center for Advanced Aviation System Development (CAASD), TSS system performance was evaluated in human-in-the-loop (HITL) simulations with currently active controllers as participants. Traffic scenarios had mixed Area Navigation (RNAV) and Required Navigation Performance (RNP) equipage, where the more advanced RNP-equipped aircraft had preferential treatment with a shorter approach option. Simulation results indicate the TSS system achieved benefits by enabling PBN, while maintaining high throughput rates-10% above baseline demand levels. Flight path predictability improved, where path deviation was reduced by 2 NM on average and variance in the downwind leg length was 75% less. Arrivals flew more fuel-efficient descents for longer, spending an average of 39 seconds less in step-down level altitude segments. Self-reported controller workload was reduced, with statistically significant differences at the p less than 0.01 level. The RNP-equipped arrivals were also able to more frequently capitalize on the benefits of being "Best-Equipped, Best- Served" (BEBS), where less vectoring was needed and nearly all RNP approaches were conducted without interruption.

  16. Design and Performance Evaluation of OFDM-Based Wireless Services Employing Radio over Optical Wireless Link

    Directory of Open Access Journals (Sweden)

    Jiang Liu

    2011-11-01

    Full Text Available This paper studies an Orthogonal Frequency Division Multiplexing (OFDM based wireless services employing Radio over Optical Wireless (RoOW to get a high performance transmission while eliminating the drawback of possible radio wave interference to electro-medical apparatus in indoor communication system. An optical Intensity-modulated Direct-detection (IM/DD system using RF subcarrier modulation is considered and OFDM RF signals are assumed as the subcarrier. The transmission performance is evaluated by simulation considering the influence of peak clip of OFDM signal and different radio fading scenarios. Simulation result shows that the modulation index m, optical transmit power, radio environments are important factors which affect the communication performance significantly. It also shows when the received optical power is larger than -20dBm, which is a very practical power level, the value of BER becomes almost independent of the optical power and the radio environment becomes more important. That means the indoor optical wireless communication (OWC has high transmission performance and the proposed relay system is a very available system as long as the radio environment is eligible. We believe that the proposed system is a practical system and can provide a low-cost, high-quality wireless services for RF sensitive areas.

  17. Evaluation of Performance of Background Traffic-based CMT-SCTP with Active Queue Management Algorithms

    Directory of Open Access Journals (Sweden)

    Meifang Shen

    2012-11-01

    Full Text Available Existing researches on performance analysis of SCTPs Concurrent Multipath Transfer (CMT-SCTP usually use DropTail algorithm as queue management algorithm without considering the impact of the background traffic. However, the background traffic of realistic network environments has an important impact on the QoS of SCTP. Besides, more and more Active Queue Management (AQM algorithms have been proposed as a router-based mechanism for early congestion detection to keep the stability of the whole network. This paper investigates the effect of background traffic on the performance of CMT-SCTP, and evaluates the performance of CMT-SCTP under two realistic simulation topologies with reasonable background traffic and different AQM algorithms in NS-2. The simulation results show that: 1 the performance of CMT-SCTP depends on characteristic of background traffic; and 2 the different AQM algorithms used as queue management algorithm under same background traffic have the different effects. Finally, this paper summarizes the proposals to satisfy the QoS requirements in terms of throughput, end-to-end packet delay and loss rate. Since CMT-PF2 is recommended by RFC4960 but without taking impact of cross traffic into account. In the second part, we use the most promising topology which meets the developing network and base on result of analysis mentioned in the first part to analyze the performance CMT-PF1/2/3/4 played respectively, in this part, the most common scenario, symmetric CMT-SCTP, is adopted and CMT-PF algorithm is turned on. A conclusion had been nailed down that, CMT-PF3 can get more advantage in terms of average throughput than CMT-PF2 which is recommended by RFC4960. Per reasonable analyzing, we lastly recommend a more reasonable resolution for realistic network in order to reaching more satisfied QoS.

  18. Malawi - Threshold Performance Evaluation

    Data.gov (United States)

    Millenium Challenge Corporation — This ex post performance evaluation was carried out to provide an independent, objective investigation into the effectiveness and efficacy of MTP activities, using...

  19. Laboratory Performance Evaluation of Physical and Mechanical Road Base Construction Properties

    Directory of Open Access Journals (Sweden)

    Mojtaba Shojaei Baghini

    2015-05-01

    Full Text Available Road-bases are quarry materials, which are used in the construction of road pavements. They comprised a combination of coarse and fine crushed materials, which when placed and compacted at the correct moisture, form a stiff layer. For soil aggregates materials to be used correctly in road construction, it is necessary to know their properties. In addition, road-base material characterizations are needed to design an adequate pavement structure for expected traffics load. This study aims to evaluate the effects of the physical, chemical and mechanical behaviors of soil aggregate as granular road base materials in order to provide rudimentary understanding of roads based materials on mechanistic-empirical pavement design and analysis using experimental laboratory tests. These tests were performed in accordance with American Society for Testing and Materials (ASTM and British Standards (BS on fine and coarse soil aggregates along with base aggregate used in pavements. The results show that the optimum moisture content, maximum dry density and plasticity index have significant influence on the behavior of these materials.

  20. Computer Architecture Performance Evaluation Methods

    CERN Document Server

    Eeckhout, Lieven

    2010-01-01

    Performance evaluation is at the foundation of computer architecture research and development. Contemporary microprocessors are so complex that architects cannot design systems based on intuition and simple models only. Adequate performance evaluation methods are absolutely crucial to steer the research and development process in the right direction. However, rigorous performance evaluation is non-trivial as there are multiple aspects to performanceevaluation, such as picking workloads, selecting an appropriate modeling or simulation approach, running the model and interpreting the results usi

  1. Performance Evaluation of Mobile Ad Hoc Network Based Communications for Future Mobile Tele-Emergency System

    Science.gov (United States)

    Viswacheda, D. V.; Barukang, L.; Hamid, M. Y.; Arifianto, M. S.

    Sparked by awareness of the limitations to provide medical services in remote areas, researchers have perceived that developing telemedicine systems is inevitable. In most cases very remote areas and disaster struck areas lack telecommunication infrastructure. Telemedicine system operating in such areas must have advanced wireless technology supporting it in devastating situation, hence it is called as tele-emergency system. Our approach is on MANET combined with Mobile IP and MIPV6, is the basis of infrastructure for the mobile tele-emergency system. The tele-emergency system requires data, voice and video transmission in its network. In this investigation, evaluation is based on simulation of the various ITU-T standard CODECs of VoIP and video transmission over MANET using discrete event simulator NS-2. The results of simulation showed that ITU-T G723.1 worked well in the MANET environment than the other CODECs for VoIP in fixed and mobility tele-emergency environments. From the simulation of video CODEC performance evaluation, it was observed that H.263 performed to a great extent in random small scale environment and also in multiple video flow of 57.6kbps speed video transmission.

  2. Kalman-filter-based orientation determination using inertial/magnetic sensors: observability analysis and performance evaluation.

    Science.gov (United States)

    Sabatini, Angelo Maria

    2011-01-01

    In this paper we present a quaternion-based Extended Kalman Filter (EKF) for estimating the three-dimensional orientation of a rigid body. The EKF exploits the measurements from an Inertial Measurement Unit (IMU) that is integrated with a tri-axial magnetic sensor. Magnetic disturbances and gyro bias errors are modeled and compensated by including them in the filter state vector. We employ the observability rank criterion based on Lie derivatives to verify the conditions under which the nonlinear system that describes the process of motion tracking by the IMU is observable, namely it may provide sufficient information for performing the estimation task with bounded estimation errors. The observability conditions are that the magnetic field, perturbed by first-order Gauss-Markov magnetic variations, and the gravity vector are not collinear and that the IMU is subject to some angular motions. Computer simulations and experimental testing are presented to evaluate the algorithm performance, including when the observability conditions are critical. PMID:22163689

  3. Kalman-Filter-Based Orientation Determination Using Inertial/Magnetic Sensors: Observability Analysis and Performance Evaluation

    Directory of Open Access Journals (Sweden)

    Angelo Maria Sabatini

    2011-09-01

    Full Text Available In this paper we present a quaternion-based Extended Kalman Filter (EKF for estimating the three-dimensional orientation of a rigid body. The EKF exploits the measurements from an Inertial Measurement Unit (IMU that is integrated with a tri-axial magnetic sensor. Magnetic disturbances and gyro bias errors are modeled and compensated by including them in the filter state vector. We employ the observability rank criterion based on Lie derivatives to verify the conditions under which the nonlinear system that describes the process of motion tracking by the IMU is observable, namely it may provide sufficient information for performing the estimation task with bounded estimation errors. The observability conditions are that the magnetic field, perturbed by first-order Gauss-Markov magnetic variations, and the gravity vector are not collinear and that the IMU is subject to some angular motions. Computer simulations and experimental testing are presented to evaluate the algorithm performance, including when the observability conditions are critical.

  4. Performance evaluation of a hand-held, semiconductor (CdZnTe)-based gamma camera

    CERN Document Server

    Abe, A; Lee, J; Oka, T; Shizukuishi, K; Kikuchi, T; Inoue, T; Jimbo, M; Ryuo, H; Bickel, C

    2003-01-01

    We have designed and developed a small field of view gamma camera, the eZ SCOPE, based on use of a CdZnTe semiconductor. This device utilises proprietary signal processing technology and an interface to a computer-based imaging system. The purpose of this study was to evaluate the performance of the eZ scope in comparison with currently employed gamma camera technology. The detector is a single wafer of 5-mm-thick CdZnTe that is divided into a 16 x 16 array (256 pixels). The sensitive area of the detector is a square of dimension 3.2 cm. Two parallel-hole collimators are provided with the system and have a matching (256 hole) pattern to the CdZnTe detector array: a low-energy, high-resolution parallel-hole (LEHR) collimator fabricated of lead and a low-energy, high-sensitivity parallel-hole (LEHS) collimator fabricated of tungsten. Performance measurements and the data analysis were done according to the procedures of the NEMA standard. We also studied the long-term stability of the system with continuous use...

  5. Design, Implementation, and Performance Evaluation of Efficient PMIPv6 Based Mobile Multicast Sender Support Schemes

    Directory of Open Access Journals (Sweden)

    Lili Wang

    2015-01-01

    Full Text Available Proxy Mobile IPv6 (PMIPv6 is proposed as a promising network-based mobility management protocol, which does not need any participation of mobile nodes. PMIPv6 does not support the multicast well and most of the current research concentrates on the mobile multicast receiver. However, the mobile multicast sender is also very important and challenging, which has not been addressed well. Therefore, in this paper we propose two efficient PMIPv6 based mobile multicast sender support schemes which are PMIP bidirectional tunneling (PMIP-BT and PMIP direct routing (PMIP-DR. In the PMIP-BT, the multicast traffic can be delivered through the PMIPv6 bidirectional tunnel, while, in the PMIP-DR, the multicast data can be transmitted via an optimized direct multicast routing. Both of them can support the multicast sender mobility transparently enabled in the PMIPv6 networks. We evaluate the performance of the proposed schemes by theoretical analysis, and the numerical results show that the proposed schemes have a better performance in terms of the signaling cost than the current schemes. Meanwhile, the proposed schemes are also implemented on the test bed, and the experimental results not only verify the validity and feasibility of our proposed schemes, but also conclude the different scenarios to which they are applicable.

  6. Performance evaluation of bipolar and tripolar excitations during nozzle-jetting-based alginate microsphere fabrication

    International Nuclear Information System (INIS)

    Microspheres, small spherical (polymeric) particles with or without second phase materials embedded or encapsulated, are important for many biomedical applications such as drug delivery and organ printing. Scale-up fabrication with the ability to precisely control the microsphere size and morphology has always been of great manufacturing interest. The objective of this work is to experimentally study the performance differences of bipolar and tripolar excitation waveforms in using drop-on-demand (DOD)-based single nozzle jetting for alginate microsphere fabrication. The fabrication performance has been evaluated based on the formability of alginate microspheres as a function of materials properties (sodium alginate and calcium chloride concentrations) and operating conditions. The operating conditions for each excitation include voltage rise/fall times, dwell times and excitation voltage amplitudes. Overall, the bipolar excitation is more robust in making spherical, monodispersed alginate microspheres as good microspheres for its wide working range of material properties and operating conditions, especially during the fabrication of highly viscous materials such as the 2% sodium alginate solution. For both bipolar and tripolar excitations, the sodium alginate concentration and the voltage dwell times should be carefully selected to achieve good microsphere formability. (paper)

  7. Comparative Performance Evaluation of Orthogonal-Signal-Generators-Based Single-Phase PLL Algorithms

    DEFF Research Database (Denmark)

    Han, Yang; Luo, Mingyu; Zhao, Xin;

    2016-01-01

    of this paper is to present a survey of the comparative performance evaluation among the state-of-the-art OSG-PLLs (include Delay-PLL, Deri-PLL, Park-PLL, SOGI-PLL, DOEC-PLL, VTD-PLL, CCF-PLL, and TPFA-PLL) under different grid disturbances such as voltage sags, phase and frequency jumps, and in the presence......The orthogonal signal generator based phase-locked loops (OSG-PLLs) are among the most popular single-phase PLLs within the areas of power electronics and power systems, mainly because they are often easy to be implement and offer a robust performance against the grid disturbances. The main aim...... of dc offset, harmonic components, and white noise in their input. This analysis provides a useful insight about the advantages and disadvantages of these PLLs. The performance enhancement of Delay-PLL, Deri-PLL, and CCF-PLL by including a moving average (MAF) filter into their structure is another goal...

  8. Evaluation of feedback reduction techniques in hearing aids based on physical performance measures.

    Science.gov (United States)

    Spriet, Ann; Moonen, Marc; Wouters, Jan

    2010-09-01

    This paper presents a physical evaluation of four feedback cancellation techniques in commercial hearing aids and two implementations of a recently developed feedback cancellation algorithm. Based on physical measures for detecting instability, oscillations and distortion, three performance aspects were measured: 1) the added stable gain compared to the hearing aid operating without feedback reduction for white noise as well as for spectrally colored input signals in two static acoustic conditions, 2) the amount of feedback, oscillations and distortion at gain values below the maximum stable gain, 3) the ability to track feedback path changes. Added stable gains between 3 dB and 26 dB were identified. Five of the six techniques achieve worse feedback reduction for a tonal opera input signal than for a speech input signal. Preventing the feedback canceller to drift away from an initial feedback path measurement results in improved performance for tonal signals at the expense of a worse feedback reduction in the acoustic conditions that differ from the condition for which the initialization was performed, as well as a worse tracking of feedback path changes. Repeated measures indicated that the reproducibility of the test set-up is crucial, in particular when the hearing aid operates close to instability. PMID:20815460

  9. Evaluating stream health based environmental justice model performance at different spatial scales

    Science.gov (United States)

    Daneshvar, Fariborz; Nejadhashemi, A. Pouyan; Zhang, Zhen; Herman, Matthew R.; Shortridge, Ashton; Marquart-Pyatt, Sandra

    2016-07-01

    This study evaluated the effects of spatial resolution on environmental justice analysis concerning stream health. The Saginaw River Basin in Michigan was selected since it is an area of concern in the Great Lakes basin. Three Bayesian Conditional Autoregressive (CAR) models (ordinary regression, weighted regression and spatial) were developed for each stream health measure based on 17 socioeconomic and physiographical variables at three census levels. For all stream health measures, spatial models had better performance compared to the two non-spatial ones at the census tract and block group levels. Meanwhile no spatial dependency was found at the county level. Multilevel Bayesian CAR models were also developed to understand the spatial dependency at the three levels. Results showed that considering level interactions improved models' prediction. Residual plots also showed that models developed at the block group and census tract (in contrary to county level models) are able to capture spatial variations.

  10. Evaluation of the Performance of the Hybrid Lattice Boltzmann Based Numerical Flux

    Science.gov (United States)

    Zheng, H. W.; Shu, C.

    2016-06-01

    It is well known that the numerical scheme is a key factor to the stability and accuracy of a Navier-Stokes solver. Recently, a new hybrid lattice Boltzmann numerical flux (HLBFS) is developed by Shu's group. It combines two different LBFS schemes by a switch function. It solves the Boltzmann equation instead of the Euler equation. In this article, the main object is to evaluate the ability of this HLBFS scheme by our in-house cell centered hybrid mesh based Navier-Stokes code. Its performance is examined by several widely-used bench-mark test cases. The comparisons on results between calculation and experiment are conducted. They show that the scheme can capture the shock wave as well as the resolving of boundary layer.

  11. Performance Evaluation of Fingerprint Identification Based on DCT and DWT using Multiple Matching Techniques

    Directory of Open Access Journals (Sweden)

    Lavanya B. N.

    2011-11-01

    Full Text Available The fingerprint is a physiological trait used to identify a person. In this paper, Performance Evaluation of Fingerprint Identification based on DCT and DWT using Multiple Matching Techniques (FDDMM is proposed. The fingerprint is segmented into four cells of each size 150*240. The DCT is applied on each cell. The Harr Wavelet is applied on DCT coefficient of each cell. The directional information features and centre area features are computed on LL sub band. The final Feature Vector is obtained by concatenating Directional Information and Centre Area Features. The matching techniques viz., ED, SVM, and RF are used to compare test image feature with database image features. It is observed that the values of TSR and FRR are better in the case of proposed algorithm compared to existing algorithm.

  12. Performance Evaluation of Sadoghi Hospital Based on «EFQM» Organizational Excellence Model

    OpenAIRE

    A Sanayeei; Shahin, A.; M Younesi far

    2013-01-01

    Introduction: Realm of health care that organizations have faced in recent years has been described with high level of dynamism and development. To survive in such conditions, performance evaluation can have an effective role in satisfying proper quality for services. This study aimed to evaluate the performance of Shahid Sadoghi Yazd hospital through EFQM approach. Methods: This was a descriptive cross-sectional study. Data collection instrument was EFQM organization Excellence Model questio...

  13. Performance Evaluation of a Nanofluid-Based Direct Absorption Solar Collector with Parabolic Trough Concentrator

    Directory of Open Access Journals (Sweden)

    Guoying Xu

    2015-12-01

    Full Text Available Application of solar collectors for hot water supply, space heating, and cooling plays a significant role in reducing building energy consumption. For conventional solar collectors, solar radiation is absorbed by spectral selective coating on the collectors’ tube/plate wall. The poor durability of the coating can lead to an increased manufacturing cost and unreliability for a solar collector operated at a higher temperature. Therefore, a novel nanofluid-based direct absorption solar collector (NDASC employing uncoated collector tubes has been proposed, and its operating characteristics for medium-temperature solar collection were theoretically and experimentally studied in this paper. CuO/oil nanofluid was prepared and used as working fluid of the NDASC. The heat-transfer mechanism of the NDASC with parabolic trough concentrator was theoretically evaluated and compared with a conventional indirect absorption solar collector (IASC. The theoretical analysis results suggested that the fluid’s temperature distribution in the NDASC was much more uniform than that in the IASC, and an enhanced collection efficiency could be achieved for the NDASC operated within a preferred working temperature range. To demonstrate the feasibility of the proposed NDASC, experimental performances of an NDASC and an IASC with the same parabolic trough concentrator were furthermore evaluated and comparatively discussed.

  14. Thermodynamic Performance Evaluation of Gas Turbine Based on Tri-generation System

    Directory of Open Access Journals (Sweden)

    J. P. Yadav

    2013-02-01

    Full Text Available Thermodynamic analysis can be perfect tool for identifying the ways for improving the efficiency of fuel use, and determining the best configuration and equipment size for a Tri-generation plant. In this paper thermodynamic performance evaluation of gas turbine based on tri-generation system has been carried out. The operating parameter at inlet and outlet of each components involved in tri-generation system are determined. By using engineering equation solver (EES parameters like enthalpy, entropy, exergy; etc are determined. The system performance parameters (first law, second law efficiency and exergy are estimated with the help of these parameters. Parametric study has been done to investigate the effects of overall pressure ratio, turbine inlet temperature, and inlet air temperature on exergy destruction, first law efficiency, electrical to thermal energy ratio and second law efficiency of the components and overall system. The thermodynamic analysis shows the exergy destruction in combustion chamber and HRSG is significantly affected by the pressure ratio and TIT.

  15. A fuzzy MCDM approach for evaluating school performance based on linguistic information

    Science.gov (United States)

    Musani, Suhaina; Jemain, Abdul Aziz

    2013-11-01

    Decision making is the process of finding the best option among the feasible alternatives. This process should consider a variety of criteria, but this study only focus on academic achievement. The data used is the percentage of candidates who obtained Malaysian Certificate of Education (SPM) in Melaka based on school academic achievement for each subject. 57 secondary schools in Melaka as listed by the Ministry of Education involved in this study. Therefore the school ranking can be done using MCDM (Multi Criteria Decision Making) methods. The objective of this study is to develop a rational method for evaluating school performance based on linguistic information. Since the information or level of academic achievement provided in linguistic manner, there is a possible chance of getting incomplete or uncertain problems. So in order to overcome the situation, the information could be provided as fuzzy numbers. Since fuzzy set represents the uncertainty in human perceptions. In this research, VIKOR (Multi Criteria Optimization and Compromise Solution) has been used as a MCDM tool for the school ranking process in fuzzy environment. Results showed that fuzzy set theory can solve the limitations of using MCDM when there is uncertainty problems exist in the data.

  16. Videoconferencing of a national program for residents on evidence-based practice: early performance evaluation.

    LENUS (Irish Health Repository)

    O'Regan, Kevin

    2010-01-01

    The aim of this study was to evaluate the effectiveness of the medium of videoconferencing for the delivery of a course for radiology residents in practice-based learning (PBL), including evidence-based practice, at centers geographically separated from the principal teaching site.

  17. Based on Regular Expression Matching of Evaluation of the Task Performance in WSN: A Queue Theory Approach

    OpenAIRE

    2014-01-01

    Due to the limited resources of wireless sensor network, low efficiency of real-time communication scheduling, poor safety defects, and so forth, a queuing performance evaluation approach based on regular expression match is proposed, which is a method that consists of matching preprocessing phase, validation phase, and queuing model of performance evaluation phase. Firstly, the subset of related sequence is generated in preprocessing phase, guiding the validation phase distributed matching...

  18. Performance Evaluation of Mesh based Multicast Reactive Routing Protocol under Black Hole Attack

    CERN Document Server

    Anita, E A Mary

    2009-01-01

    A mobile ad-hoc network is an autonomous system of mobile nodes connected by wireless links in which nodes cooperate by forwarding packets for each other thereby enabling communication beyond direct wireless transmission range. The wireless and dynamic nature of ad-hoc networks makes them vulnerable to attacks especially in routing protocols. Providing security in mobile ad-hoc networks has been a major issue over the recent years. One of the prominent mesh base reactive multicast routing protocols used in ad-hoc networks is On Demand Multicast Routing protocol (ODMRP). The security of ODMRP is compromised by a primary routing attack called black hole attack. In this attack a malicious node advertises itself as having the shortest path to the node whose packets it wants to intercept. This paper discusses the impact of black hole attack on ODMRP under various scenarios. The performance is evaluated using metrics such as packet delivery ratio and end to end delay for various numbers of senders and receivers via...

  19. Performance Evaluation of Rural Cooperative Economic Organizations in Hunan Province Based on Structural Equation

    Institute of Scientific and Technical Information of China (English)

    Naman; YANG

    2015-01-01

    Using the method of structural equation and balanced scorecard,this paper establishes the evaluation indicators and evaluation model for the performance of 21 rural cooperative economic organizations in X City of Hunan Province,and analyzes the relationship between indicators and dimensions of performance evaluation indicators,in order to find the influencing factors,obstacles and successful experience concerning the development of rural cooperative economic organizations. According to model analysis and conclusions,this paper sets forth the recommendations for promoting the development of rural cooperative economic organizations in Hunan Province,in order to provide a scientific basis for the institutional design and mechanism innovation of rural cooperative economic organizations in Hunan Province.

  20. PARALLEL IMPLEMENTATION OF CROSS-LAYER OPTIMIZATION - A PERFORMANCE EVALUATION BASED ON SWARM INTELLIGENCE

    Directory of Open Access Journals (Sweden)

    Vanaja Gokul

    2012-01-01

    Full Text Available In distributed systems real time optimizations need to be performed dynamically for better utilization of the network resources. Real time optimizations can be performed effectively by using Cross Layer Optimization (CLO within the network operating system. This paper presents the performance evaluation of Cross Layer Optimization (CLO in comparison with the traditional approach of Single-Layer Optimization (SLO. In the parallel implementation of the approaches the experimental study carried out indicates that the CLO results in a significant improvement in network utilization when compared to SLO. A variant of the Particle Swarm Optimization technique that utilizes Digital Pheromones (PSODP for better performance has been used here. A significantly higher speed up in performance was observed from the parallel implementation of CLO that used PSODP on a cluster of nodes.

  1. Performance Evaluation of Sadoghi Hospital Based on «EFQM» Organizational Excellence Model

    Directory of Open Access Journals (Sweden)

    A Sanayeei

    2013-04-01

    Full Text Available Introduction: Realm of health care that organizations have faced in recent years has been described with high level of dynamism and development. To survive in such conditions, performance evaluation can have an effective role in satisfying proper quality for services. This study aimed to evaluate the performance of Shahid Sadoghi Yazd hospital through EFQM approach. Methods: This was a descriptive cross-sectional study. Data collection instrument was EFQM organization Excellence Model questionnaire which was completed by all the managers. The research data was gathered from a sample of 302 patients, staff, personnel and medical staff working in different parts of the hospital. Random stratified samples were selected and descriptive statistics were utilized in order to analyze the data. Results: The results revealed that Shahid Sadoughi hospital acquired 185.41 points out of the total 500 points considered in the model EFQM. In other words, the rating reflects the fact that regarding the defined desired position, the hospital has not achieved the desired rating. Conclusion: Since the hospital performance is posited in a low-middle class, much more attention is required in regard to therapeutic management in this hospital. Therefore, codifying an efficient and effective program to improve the hospital performance is necessary. Furthermore, it seems that EFQM model can be considered as a comprehensive model for performance evaluation in hospitals.

  2. Validating the ACE Model for Evaluating Student Performance Using a Teaching-Learning Process Based on Computational Modeling Systems

    Science.gov (United States)

    Louzada, Alexandre Neves; Elia, Marcos da Fonseca; Sampaio, Fábio Ferrentini; Vidal, Andre Luiz Pestana

    2014-01-01

    The aim of this work is to adapt and test, in a Brazilian public school, the ACE model proposed by Borkulo for evaluating student performance as a teaching-learning process based on computational modeling systems. The ACE model is based on different types of reasoning involving three dimensions. In addition to adapting the model and introducing…

  3. Computational Principle and Performance Evaluation of Coherent Ising Machine Based on Degenerate Optical Parametric Oscillator Network

    Directory of Open Access Journals (Sweden)

    Yoshitaka Haribara

    2016-04-01

    Full Text Available We present the operational principle of a coherent Ising machine (CIM based on a degenerate optical parametric oscillator (DOPO network. A quantum theory of CIM is formulated, and the computational ability of CIM is evaluated by numerical simulation based on c-number stochastic differential equations. We also discuss the advanced CIM with quantum measurement-feedback control and various problems which can be solved by CIM.

  4. Measurement-Based Evaluation of Installed Filtration System Performance in Single-Family Homes

    Energy Technology Data Exchange (ETDEWEB)

    Chan, Wanyu Rengie; Singer, Brett C.

    2014-04-03

    This guide discusses important study design issues to consider when conducting an on-site evaluation of filtration system performance. The two most important dichotomies to consider in developing a study protocol are (1) whether systems are being evaluated in occupied or unoccupied homes and (2) whether different systems are being compared in the same homes or if the comparison is between systems installed in different homes. This document provides perspective and recommendations about a suite of implementation issues including the choice of particle measurement devices, selection of sampling locations, ways to control and/or monitor factors and processes that can impact particle concentrations, and data analysis approaches.

  5. Manufacturing system modeling and performance evaluation based on improved stochastic statechart

    Institute of Scientific and Technical Information of China (English)

    ZHANG Guojun; HE Jiabing; ZHU Haiping; CHEN Xuan

    2007-01-01

    Stochastic statecharts are widely used in modeling systems. Considering that the comparability between different subsystems can streamline the modeling process,a stochastic statechart is improved by using the abstract sub-system and general system chart to express the comparability and integrity of a stochastic statechart respectively.Performance data can be obtained by using a continuous-time Markov chain, which is transformed from a manufacturing system model described by the improved stochastic statechart.The case study shows that the improved stochastic statechart can effectively simplify the modeling and performance evaluation process and the results are useful to the configuration and optimization of a manufacturing system.

  6. Performance evaluation of imaging seeker tracking algorithm based on multi-features

    Science.gov (United States)

    Li, Yujue; Yan, Jinglong

    2011-08-01

    The paper presents a new efficient method for performance evaluation of imaging seeker tracking algorithm. The method utilizes multi features which associate with tracking point of each video frame, gets local score(LS) for every feature, and achieves global score(GS) for given tracking algorithm according to the combined strategy. The method can be divided into three steps. In a first step, it extracts evaluation feature from neighbor zone of each tracking point. The feature may include tracking error, shape of target, area of target, tracking path, and so on. Then, as to each feature, a local score can be got rely on the number of target which tracked successfully. It uses similarity measurement and experiential threshold between neighbor zone of tracking point and target template to define tracking successful or not. Of course, the number should be 0 or 1 for single target tracking. Finally, it assigns weight for each feature according to the validity grade for the performance. The weights multiply by local scores and normalized between 0 and 1, this gets global score of certain tracking algorithm. By compare the global score of each tracking algorithm as to certain type of scene, it can evaluate the performance of tracking algorithm quantificational. The proposed method nearly covers all tracking error factors which can be introduced into the process of target tracking, so the evaluation result has a higher reliability. Experimental results, obtained with flying video of infrared imaging seeker, and also included several target tracking algorithms, illustrate the performance of target tracking, demonstrate the effectiveness and robustness of the proposed method.

  7. Rock Drilling Performance Evaluation by an Energy Dissipation Based Rock Brittleness Index

    Science.gov (United States)

    Munoz, H.; Taheri, A.; Chanda, E. K.

    2016-08-01

    To reliably estimate drilling performance both tool-rock interaction laws along with a proper rock brittleness index are required to be implemented. In this study, the performance of a single polycrystalline diamond compact (PDC) cutter cutting and different drilling methods including PDC rotary drilling, roller-cone rotary drilling and percussive drilling were investigated. To investigate drilling performance by rock strength properties, laboratory PDC cutting tests were performed on different rocks to obtain cutting parameters. In addition, results of laboratory and field drilling on different rocks found elsewhere in literature were used. Laboratory and field cutting and drilling test results were coupled with values of a new rock brittleness index proposed herein and developed based on energy dissipation withdrawn from the complete stress-strain curve in uniaxial compression. To quantify cutting and drilling performance, the intrinsic specific energy in rotary-cutting action, i.e. the energy consumed in pure cutting action, and drilling penetration rate values in percussive action were used. The results show that the new energy-based brittleness index successfully describes the performance of different cutting and drilling methods and therefore is relevant to assess drilling performance for engineering applications.

  8. An Application-Based Performance Evaluation of NASAs Nebula Cloud Computing Platform

    Science.gov (United States)

    Saini, Subhash; Heistand, Steve; Jin, Haoqiang; Chang, Johnny; Hood, Robert T.; Mehrotra, Piyush; Biswas, Rupak

    2012-01-01

    The high performance computing (HPC) community has shown tremendous interest in exploring cloud computing as it promises high potential. In this paper, we examine the feasibility, performance, and scalability of production quality scientific and engineering applications of interest to NASA on NASA's cloud computing platform, called Nebula, hosted at Ames Research Center. This work represents the comprehensive evaluation of Nebula using NUTTCP, HPCC, NPB, I/O, and MPI function benchmarks as well as four applications representative of the NASA HPC workload. Specifically, we compare Nebula performance on some of these benchmarks and applications to that of NASA s Pleiades supercomputer, a traditional HPC system. We also investigate the impact of virtIO and jumbo frames on interconnect performance. Overall results indicate that on Nebula (i) virtIO and jumbo frames improve network bandwidth by a factor of 5x, (ii) there is a significant virtualization layer overhead of about 10% to 25%, (iii) write performance is lower by a factor of 25x, (iv) latency for short MPI messages is very high, and (v) overall performance is 15% to 48% lower than that on Pleiades for NASA HPC applications. We also comment on the usability of the cloud platform.

  9. Evaluation of Teaching Performance: Considerations from the Competency-Based Approach

    Directory of Open Access Journals (Sweden)

    Mario Rueda Beltrán

    2009-11-01

    Full Text Available The article gives an overview of the main arguments and characteristics attributed to the Competency-based Approach in education, so as to analyze the various definitions available and some of the proposals on the subject of teaching skills. Approaches and strategies are suggested for developing teacher-evaluation programs in the context of a generalized environment in the educational sector which is adopting the model of competencies for school reform, curriculum redesign, modifications in teaching strategies, and manners and functions of evaluation.

  10. Distributed Space Mission Design for Earth Observation Using Model-Based Performance Evaluation

    Science.gov (United States)

    Nag, Sreeja; LeMoigne-Stewart, Jacqueline; Cervantes, Ben; DeWeck, Oliver

    2015-01-01

    Distributed Space Missions (DSMs) are gaining momentum in their application to earth observation missions owing to their unique ability to increase observation sampling in multiple dimensions. DSM design is a complex problem with many design variables, multiple objectives determining performance and cost and emergent, often unexpected, behaviors. There are very few open-access tools available to explore the tradespace of variables, minimize cost and maximize performance for pre-defined science goals, and therefore select the most optimal design. This paper presents a software tool that can multiple DSM architectures based on pre-defined design variable ranges and size those architectures in terms of predefined science and cost metrics. The tool will help a user select Pareto optimal DSM designs based on design of experiments techniques. The tool will be applied to some earth observation examples to demonstrate its applicability in making some key decisions between different performance metrics and cost metrics early in the design lifecycle.

  11. Evaluation of a Performance-Based Expert Elicitation: WHO Global Attribution of Foodborne Diseases.

    Science.gov (United States)

    Aspinall, W P; Cooke, R M; Havelaar, A H; Hoffmann, S; Hald, T

    2016-01-01

    For many societally important science-based decisions, data are inadequate, unreliable or non-existent, and expert advice is sought. In such cases, procedures for eliciting structured expert judgments (SEJ) are increasingly used. This raises questions regarding validity and reproducibility. This paper presents new findings from a large-scale international SEJ study intended to estimate the global burden of foodborne disease on behalf of WHO. The study involved 72 experts distributed over 134 expert panels, with panels comprising thirteen experts on average. Elicitations were conducted in five languages. Performance-based weighted solutions for target questions of interest were formed for each panel. These weights were based on individual expert's statistical accuracy and informativeness, determined using between ten and fifteen calibration variables from the experts' field with known values. Equal weights combinations were also calculated. The main conclusions on expert performance are: (1) SEJ does provide a science-based method for attribution of the global burden of foodborne diseases; (2) equal weighting of experts per panel increased statistical accuracy to acceptable levels, but at the cost of informativeness; (3) performance-based weighting increased informativeness, while retaining accuracy; (4) due to study constraints individual experts' accuracies were generally lower than in other SEJ studies, and (5) there was a negative correlation between experts' informativeness and statistical accuracy which attenuated as accuracy improved, revealing that the least accurate experts drive the negative correlation. It is shown, however, that performance-based weighting has the ability to yield statistically accurate and informative combinations of experts' judgments, thereby offsetting this contrary influence. The present findings suggest that application of SEJ on a large scale is feasible, and motivate the development of enhanced training and tools for remote

  12. Performance Evaluation a Teaching Hospital Affiliated to Tehran University of Medical Sciences Based on Baldrige Excellence Model

    Directory of Open Access Journals (Sweden)

    Fereshteh Farzianpour

    2011-01-01

    Full Text Available Problem statement: Today, organizations are willing to achieve quality as a source of competitive advantage. Therefore, their performance evaluation and quality improvement is essential. One of the international models in this field is Baldrige health care model. Approach: The study aimed to evaluate Performance Evaluation a teaching Hospital Affiliated to Tehran University of Medical Sciences Based on Baldrige Excellence Model. Performance was evaluated by two types Baldrige questionnaire (i.e., process and result criteria. Six process criteria (Leadership; Strategic Planning; Focus on Patients, Other Customers and Markets; Measurement, Analysis and Knowledge Management; Workforce Focus; and Process Management with 12 sub-criteria, were evaluated based on four factors of Approach, Deployment, Learning and Integration. Results criteria with six subcriteria were evaluated based on four factors of performance level, rate and breath of performance improvement, comparative and benchmark data and relevance of evaluation result scales. Results: The teaching hospital obtained 145/21 scores (26/40 percent out of a total of 550 points in process criteria and 90/37 scores (20/08 percent out of a total of 450 points in result criteria. Studied hospital obtained the highest score in Measurement, Analysis and Knowledge Management 28/1 scores (31/22 percent. In Sum, the hospital obtained 235/58 scores (23/55 percent out of 1000 points. Conclusion: Scores obtained by hospital showed the first level of excellence. The outcome of this study clearly indicates that Baldrige model criteria act as a powerful tool to analyze the quality performance of the hospitals. The researchers attempted to create a common language and a roadmap in order to follow the path of excellence in health care organizations in Iran.

  13. A string matching based algorithm for performance evaluation of mathematical expression recognition

    Indian Academy of Sciences (India)

    P Pavan Kumar; Arun Agarwal; Chakravarthy Bhagvati

    2014-02-01

    In this paper, we have addressed the problem of automated performance evaluation of Mathematical Expression (ME) recognition. Automated evaluation requires that recognition output and ground truth in some editable format like LaTeX, MathML, etc. have to be matched. But standard forms can have extraneous symbols or tags. For example, tag is added for an operator in MathML and \\begin{array} is used to encoded matrices in LaTeX. These extraneous symbols are also involved in matching that is not intuitive. For that, we have proposed a novel structure encoded string representation that is independent of any editable format. Structure encoded strings retain the structure (spatial relationships like superscript, subscript, etc.) and do not contain any extraneous symbols. As structure encoded strings give the linear representation of MEs, Levenshtein edit distance is used as a measure for performance evaluation. Therefore, in our approach, recognition output and ground truth in LaTeX form are converted to their corresponding structure encoded strings and Levenshtein edit distance is computed between them.

  14. Financial access to health care in Karuzi, Burundi: a household-survey based performance evaluation

    OpenAIRE

    Van Herp Michel; Bachy Catherine; Reid Tony; Ponsar Frederique; Lambert-Evans Sophie; Philips Mit

    2009-01-01

    Abstract Background In 2003, Médecins Sans Frontières, the provincial government, and the provincial health authority began a community project to guarantee financial access to primary health care in Karuzi province, Burundi. The project used a community-based assessment to provide exemption cards for indigent households and a reduced flat fee for consultations for all other households. Methods An evaluation was carried out in 2005 to assess the impact of this project. Primary data collection...

  15. Multi-scale computational framework for evaluating of the performance of molecular based flash cells

    OpenAIRE

    Georgiev, Vihar; Asenov, Asen

    2015-01-01

    In this work we present a multi-scale computational framework for evaluation of statistical variability in a molecular based non-volatile memory cell. As a test case we analyse a BULK flash cell with polyoxometalates (POM) inorganic molecules used as storage centres. We focuse our discussions on the methodology and development of our innovative and unique computational framework. The capability of the discussed multi-scale approach is demonstrated by establishing a link between the threshold ...

  16. Performance Evaluation of Large Aperture 'Polished Panel' Optical Receivers Based on Experimental Data

    Science.gov (United States)

    Vilnrotter, Victor

    2013-01-01

    Recent interest in hybrid RF/Optical communications has led to the development and installation of a "polished-panel" optical receiver evaluation assembly on the 34-meter research antenna at Deep-Space Station 13 (DSS-13) at NASA's Goldstone Communications Complex. The test setup consists of a custom aluminum panel polished to optical smoothness, and a large-sensor CCD camera designed to image the point-spread function (PSF) generated by the polished aluminum panel. Extensive data has been obtained via realtime tracking and imaging of planets and stars at DSS-13. Both "on-source" and "off-source" data were recorded at various elevations, enabling the development of realistic simulations and analytic models to help determine the performance of future deep-space communications systems operating with on-off keying (OOK) or pulse-position-modulated (PPM) signaling formats with photon-counting detection, and compared with the ultimate quantum bound on detection performance for these modulations. Experimentally determined PSFs were scaled to provide realistic signal-distributions across a photon-counting detector array when a pulse is received, and uncoded as well as block-coded performance analyzed and evaluated for a well-known class of block codes.

  17. Evaluation on home storage performance of table grape based on sensory quality and consumers' satisfaction.

    Science.gov (United States)

    Ma, Changyang; Fu, Zetian; Xu, Mark; Trebar, Mira; Zhang, Xiaoshuan

    2016-03-01

    With continuous rise of table grapes consumption and increased public awareness of food safety, the quality control of grapes in storage after purchase is not sufficiently examined. Home storage constitutes the last and important stage in grape supply chain. Literature review shows that few researches on grape quality focus on the home storage stage compared with numerous researches reported on the quality control during postharvest and transportation process. This paper reports the performance evaluation of grape quality at home storage and consumers' satisfaction using integrated sensory evaluations. The internal attributes, including Texture, Taste and Odor of the table grapes and the appearance indices, Color and Cleanliness are examined. Key results show that during home storage, all the internal attributes decrease rapidly as time goes on, and cleanliness and color appear to be deteriorating in a lower speed. A comprehensive quality index was created to measure the quality of table grape which has high correlation with the Overall acceptability perceived by consumers. PMID:27570261

  18. BER Performance Evaluation of two Types of Antenna Array-Based Receivers in a Multipath Channel

    Directory of Open Access Journals (Sweden)

    Rim Haddad

    2010-11-01

    Full Text Available Smart antennasystems have received much attention in the last few years because they can increasesystem capacity by dynamically tuning out interference while focusing on the intended user.In this paper, we focused our research on the performance of two kinds of smart antenna receivers. Ananalytical model is proposed for evaluating the BER performance using a closed-form expression. Also,for the adaptive array, a simple way to account the multi-access interference can be exploited to evaluatethe average probability of error when the users are randomly distributed within an angular sector.The proposed model confirms the benefits of adaptive antennas in reducing the overall interference level(intercell/intracell and to find an accurate approximation of the error probability.In the two kinds of receivers, we assessed the impact of smart antenna systems and we considered thecase of conventional single antenna receiver model as reference (single user/single antenna.

  19. Performance evaluation of telemetry stations based on site selection (Short Communication)

    OpenAIRE

    M. Goswami; B. Sucharita; P. Arya

    2003-01-01

    In a test range, selection of sites for deployment of mobile telemetry stations plays a crucial role for acquiring and tracking any airborne vehicle under test. Efforts have been made to correlate the tracking performance of the auto track stations based on site selection for various test flights conducted from different launching pads. Some of the tracking methodologies discussed in this paper are single channel amplitude comparison monopulse (SCACMP) technique and E-SCAN technique. A...

  20. A novel model for cost performance evaluation of pulverized coal injected into blast furnace based on effective calorific value

    Institute of Scientific and Technical Information of China (English)

    徐润生; 张建良; 左海滨; 李克江; 宋腾飞; 邵久刚

    2015-01-01

    The combustion process of pulverized coal injected into blast furnace involves a lot of physical and chemical reactions. Based on the combustion behaviors of pulverized coal, the conception of coal effective calorific value representing the actual thermal energy provided for blast furnace was proposed. A cost performance evaluation model of coal injection was built up for the optimal selection of various kinds of coal based on effective calorific value. The model contains two indicators: coal effective calorific value which has eight sub-indicators and coal injection cost which includes four sub-indicators. In addition, the calculation principle and application of cost performance evaluation model in a Chinese large-scale iron and steel company were comprehensively introduced. The evaluation results finally confirm that this novel model is of great significance to the optimal selection of blast furnace pulverized coal.

  1. Performance Evaluation of China’s Agricultural Listed Companies Based on DEA Model

    Institute of Scientific and Technical Information of China (English)

    2012-01-01

    In order to evaluate the performance of China’s agricultural listed companies,we analyze the overall efficiency,pure technical efficiency and scale efficiency of China’s agricultural listed companies on the basis of input-output data concerning 34 agricultural listed companies,using BCC model in data envelopment analysis ( DEA) model. Then we analyze input-output redundancy situation using the slack variable derived from the model. The results show that the overall efficiency of China’s agricultural listed companies is good,and the gap in efficiency between sub-industries is small; there is significant difference in performance between listed companies engaged in the same sub-industry,and the reason for invalid DEA in companies within the industry is complex; total assets and asset-liability ratio are high,and the effective output is not fully realized. Finally corresponding recommendations are put forward for promoting the performance of agricultural listed companies as follows: strengthening brand awareness; promoting the level of production technology; adjusting the input structure; transforming the agricultural growth mode.

  2. Validating the ACE Model for Evaluating Student Performance Using a Teaching-Learning Process Based on Computational Modeling Systems

    Directory of Open Access Journals (Sweden)

    Alexandre Neves LOUZADA

    2014-04-01

    Full Text Available The aim of this work is to adapt and test, in a Brazilian public school, the ACE model proposed by Borkulo for evaluating student performance as a teaching-learning process based on computational modeling systems. The ACE model is based on different types of reasoning involving three dimensions. In addition to adapting the model and introducing innovative methodological procedures and instruments for collecting and analyzing data, our main results showed that the ACE model is superior than written tests for discriminating students on the top and bottom of the scale of scientific reasoning abilities, while both instruments are equivalent for evaluating students in the middle of the scale.

  3. A Performance/Cost Evaluation for a GPU-Based Drug Discovery Application on Volunteer Computing

    Directory of Open Access Journals (Sweden)

    Ginés D. Guerrero

    2014-01-01

    Full Text Available Bioinformatics is an interdisciplinary research field that develops tools for the analysis of large biological databases, and, thus, the use of high performance computing (HPC platforms is mandatory for the generation of useful biological knowledge. The latest generation of graphics processing units (GPUs has democratized the use of HPC as they push desktop computers to cluster-level performance. Many applications within this field have been developed to leverage these powerful and low-cost architectures. However, these applications still need to scale to larger GPU-based systems to enable remarkable advances in the fields of healthcare, drug discovery, genome research, etc. The inclusion of GPUs in HPC systems exacerbates power and temperature issues, increasing the total cost of ownership (TCO. This paper explores the benefits of volunteer computing to scale bioinformatics applications as an alternative to own large GPU-based local infrastructures. We use as a benchmark a GPU-based drug discovery application called BINDSURF that their computational requirements go beyond a single desktop machine. Volunteer computing is presented as a cheap and valid HPC system for those bioinformatics applications that need to process huge amounts of data and where the response time is not a critical factor.

  4. Improved methods for evaluating base temperature for use in building energy performance lines

    Energy Technology Data Exchange (ETDEWEB)

    Day, A.R. [London South Bank Univ., London (United Kingdom); Knight, I.; Dunn, G. [Welsh School of Architecture, Cardiff (United Kingdom); Gaddas, R. [Interserve Facilities Management Ltd., Carlisle (United Kingdom)

    2003-12-01

    The use of degree-days in building energy monitoring and targeting has often given rise to misinterpretation of results, which has in turn undermined confidence in such techniques. Anecdotal reporting has, by turns, suggested the use of degree-days either works very well, or does not work at all. This ambiguous position is not helpful to energy managers who need robust tools and clear guidance on their use. This paper presents evidence to show how energy/degree-day correlations i.e., building performance lines, can be properly identified, while taking account of the correct (and practical) energy balance of the building. In doing so it shows how the correct building base temperature can be identified from reduced data sets, while demonstrating that such a practice is desirable. Performance lines constructed in this way, where appropriate, give rise to greater accuracy and reliability of results, while forming the basis for improved diagnostics. (Author)

  5. Performance evaluation of a shell and tube heat exchanger operated with oxide based nanofluids

    Science.gov (United States)

    Shahrul, I. M.; Mahbubul, I. M.; Saidur, R.; Khaleduzzaman, S. S.; Sabri, M. F. M.

    2016-08-01

    This study is about the performance evaluation of a shell and tube heat exchanger operated with nanofluid. Thermal conductivity, viscosity, and density of the nanofluids were increased, but the specific heat of the nanofluids was decreased with increasing the concentrations of the particles. The convective heat transfer coefficient was found to be 2-15 % higher than that of water at 50 kg/min of both side fluid. Nevertheless, energy effectiveness has improved about 23-52 % for the above-mentioned nanofluids. As, energy effectiveness (ɛ) is strongly depends on the density and specific heat of the operating fluids therefore, maximum ɛ has obtained for ZnO-W nanofluid and lowest found for SiO2-W nanofluid.

  6. NONH:A New Cache—Based Coherence Protocol for Linked List Structure DSM System and Its Performance Evaluation

    Institute of Scientific and Technical Information of China (English)

    房至一; 鞠九滨

    1996-01-01

    The management of memory coherence is an important problem in distributed shared memory(DSM)system.In a cache-based coherence DSM system using linked list structure,the key to maintaining the coherence and improving system performance is how to manage the owner in the linked list.This paper presents the design of a new management protocol-NONH(New-Owner New-Head)and its performance evaluation.The analysis results show that this protocol can improve the scalability and performence of a coherent DSM system using linked list.It is also suitable for managing the cache coherency in tree-like hierarchical architecture.

  7. PERFORMANCE EVALUATION OF C-FUZZY DECISION TREE BASED IDS WITH DIFFERENT DISTANCE MEASURES

    Directory of Open Access Journals (Sweden)

    Vinayak Mantoor

    2012-01-01

    Full Text Available With the ever-increasing growth of computer networks and emergence of electronic commerce in recent years, computer security has become a priority. Intrusion detection system (IDS is often used as another wall of protection in addition to intrusion prevention techniques. This paper introduces a concept and design of decision trees based on Fuzzy clustering. Fuzzy clustering is the core functional part of the overall decision tree development and the developed tree will be referred to as C-fuzzy decision trees. Distance measure plays an important role in clustering data points. Choosing the right distance measure for a given dataset is a non-trivial problem. In this paper, we study the performance of C-fuzzy decision tree based IDS with different distance measures. We analyzed the results of our study using KDD Cup 1999 data and compared the accuracy of the classifier with different distance measures.

  8. Performance evaluation of a lossy transmission lines based diode detector at cryogenic temperature

    Science.gov (United States)

    Villa, E.; Aja, B.; de la Fuente, L.; Artal, E.

    2016-01-01

    This work is focused on the design, fabrication, and performance analysis of a square-law Schottky diode detector based on lossy transmission lines working under cryogenic temperature (15 K). The design analysis of a microwave detector, based on a planar gallium-arsenide low effective Schottky barrier height diode, is reported, which is aimed for achieving large input return loss as well as flat sensitivity versus frequency. The designed circuit demonstrates good sensitivity, as well as a good return loss in a wide bandwidth at Ka-band, at both room (300 K) and cryogenic (15 K) temperatures. A good sensitivity of 1000 mV/mW and input return loss better than 12 dB have been achieved when it works as a zero-bias Schottky diode detector at room temperature, increasing the sensitivity up to a minimum of 2200 mV/mW, with the need of a DC bias current, at cryogenic temperature.

  9. Construction of Performance Evaluation Index System for Enterprises Implementing Green Food Certification Based on BSC

    Institute of Scientific and Technical Information of China (English)

    2011-01-01

    According to the investigation results of 70 green food enterprises in Sichuan Province,the strategic targets of enterprises implementing green food certification are discussed by borrowing ideas from the Balanced Score Card.Balanced Score Card index system is selected and improved according to the changes of enterprises before and after implementing the green food certification system.Then,the performance evaluation index system of enterprises implementing green food certification is established.This index system has five strategic directions of finance,customer,internal management,social ecology,and learning and growth,and has 11 strategic targets,such as increasing operating profit,expanding market,improving the quality of staff,improving the production technology level,enhancing the core competence of enterprises,ensuring food safety,improving the physical quality of human,and protecting ecological environment.According to the principles of guidance,scientificity,comparability,feasibility,and significance,a total of 24 evaluation indices are established,including the change of product cost,change of product sales revenue,change of profit rate,change of return on investment,change of internal and external lost cost,change of the proportion of certified products in total sales and so on.

  10. About performance and evaluation of employee performance

    Directory of Open Access Journals (Sweden)

    Irinel MARIN

    2009-12-01

    Full Text Available The goal of this article is the importance of the performance and the performance evaluation in any company. Performance can be viewed as being in close relationship with the effort made by the employee, his ability, charging station or place and role within the organization. Performance refers to the contribution that employees make to the goals of the organization. While the performance evaluation is an activity which determine an organization in which employees perform their duties or their responsibilities. Performance evaluation is required in a company because it represents a process of employee motivation and development.

  11. Performance evaluation of wavelet-based face verification on a PDA recorded database

    Science.gov (United States)

    Sellahewa, Harin; Jassim, Sabah A.

    2006-05-01

    The rise of international terrorism and the rapid increase in fraud and identity theft has added urgency to the task of developing biometric-based person identification as a reliable alternative to conventional authentication methods. Human Identification based on face images is a tough challenge in comparison to identification based on fingerprints or Iris recognition. Yet, due to its unobtrusive nature, face recognition is the preferred method of identification for security related applications. The success of such systems will depend on the support of massive infrastructures. Current mobile communication devices (3G smart phones) and PDA's are equipped with a camera which can capture both still and streaming video clips and a touch sensitive display panel. Beside convenience, such devices provide an adequate secure infrastructure for sensitive & financial transactions, by protecting against fraud and repudiation while ensuring accountability. Biometric authentication systems for mobile devices would have obvious advantages in conflict scenarios when communication from beyond enemy lines is essential to save soldier and civilian life. In areas of conflict or disaster the luxury of fixed infrastructure is not available or destroyed. In this paper, we present a wavelet-based face verification scheme that have been specifically designed and implemented on a currently available PDA. We shall report on its performance on the benchmark audio-visual BANCA database and on a newly developed PDA recorded audio-visual database that take include indoor and outdoor recordings.

  12. Amplicon-based semiconductor sequencing of human exomes: performance evaluation and optimization strategies.

    Science.gov (United States)

    Damiati, E; Borsani, G; Giacopuzzi, Edoardo

    2016-05-01

    The Ion Proton platform allows to perform whole exome sequencing (WES) at low cost, providing rapid turnaround time and great flexibility. Products for WES on Ion Proton system include the AmpliSeq Exome kit and the recently introduced HiQ sequencing chemistry. Here, we used gold standard variants from GIAB consortium to assess the performances in variants identification, characterize the erroneous calls and develop a filtering strategy to reduce false positives. The AmpliSeq Exome kit captures a large fraction of bases (>94 %) in human CDS, ClinVar genes and ACMG genes, but with 2,041 (7 %), 449 (13 %) and 11 (19 %) genes not fully represented, respectively. Overall, 515 protein coding genes contain hard-to-sequence regions, including 90 genes from ClinVar. Performance in variants detection was maximum at mean coverage >120×, while at 90× and 70× we measured a loss of variants of 3.2 and 4.5 %, respectively. WES using HiQ chemistry showed ~71/97.5 % sensitivity, ~37/2 % FDR and ~0.66/0.98 F1 score for indels and SNPs, respectively. The proposed low, medium or high-stringency filters reduced the amount of false positives by 10.2, 21.2 and 40.4 % for indels and 21.2, 41.9 and 68.2 % for SNP, respectively. Amplicon-based WES on Ion Proton platform using HiQ chemistry emerged as a competitive approach, with improved accuracy in variants identification. False-positive variants remain an issue for the Ion Torrent technology, but our filtering strategy can be applied to reduce erroneous variants.

  13. Amplicon-based semiconductor sequencing of human exomes: performance evaluation and optimization strategies.

    Science.gov (United States)

    Damiati, E; Borsani, G; Giacopuzzi, Edoardo

    2016-05-01

    The Ion Proton platform allows to perform whole exome sequencing (WES) at low cost, providing rapid turnaround time and great flexibility. Products for WES on Ion Proton system include the AmpliSeq Exome kit and the recently introduced HiQ sequencing chemistry. Here, we used gold standard variants from GIAB consortium to assess the performances in variants identification, characterize the erroneous calls and develop a filtering strategy to reduce false positives. The AmpliSeq Exome kit captures a large fraction of bases (>94 %) in human CDS, ClinVar genes and ACMG genes, but with 2,041 (7 %), 449 (13 %) and 11 (19 %) genes not fully represented, respectively. Overall, 515 protein coding genes contain hard-to-sequence regions, including 90 genes from ClinVar. Performance in variants detection was maximum at mean coverage >120×, while at 90× and 70× we measured a loss of variants of 3.2 and 4.5 %, respectively. WES using HiQ chemistry showed ~71/97.5 % sensitivity, ~37/2 % FDR and ~0.66/0.98 F1 score for indels and SNPs, respectively. The proposed low, medium or high-stringency filters reduced the amount of false positives by 10.2, 21.2 and 40.4 % for indels and 21.2, 41.9 and 68.2 % for SNP, respectively. Amplicon-based WES on Ion Proton platform using HiQ chemistry emerged as a competitive approach, with improved accuracy in variants identification. False-positive variants remain an issue for the Ion Torrent technology, but our filtering strategy can be applied to reduce erroneous variants. PMID:27003585

  14. Performance Evaluation of a Nanofluid (CuO-H2O Based Low Flux Solar Collector

    Directory of Open Access Journals (Sweden)

    Lal Kundan

    2013-04-01

    Full Text Available As the fossil fuels are depleting continuously, we know that solar energy harvesting is a significant potential area for new research dimensions. Sun provides us about 1.9 x 108TWh/yr on the land, of which 1.3 x 105 TWh]/yr energy is used. In order to make much use of solar energy on the earth, solar energy harvesting into more usable form (e.g. heat or electricity by using solar energy collectors is important aspect. A solar collector [1] is a device which transfers the collected solar energy to a fluid passing in contact with it. The performance of collector does not only depends upon how effective the absorber is, but also on how effective are the heat transfer and thermal properties (e.g. thermal conductivity, heat capacity of the fluid which is being used. The absorption properties of the fluids generally used in solar collectors are very poor which in turn limits the efficiency of the solar collector. So, there is a need to use energy efficient heat transfer fluids for high efficiency and performance. A relatively new attempt has been made to increase the performance of the solar collector by using nanofluids. Recently developed a new class of working fluids called Nanofluids, found to be possessing better thermal properties over the hosting fluids, can be a good option in the solar collector [5]. In our research work the CuO-water based nanofluid has been tested in the solar collector and their performance is investigated. It has been found that efficiency if the solar collector is increased by 4-6% compared to water

  15. Performance Evaluation of TPA-HE Based Fine Grained Data Access for Cloud Computing

    Directory of Open Access Journals (Sweden)

    Pawan Kumar Parmar

    2014-10-01

    Full Text Available As the software technology evolves the focus of users are shifting form devices for data or information. This transformation requires reliable and scalable computing paradigms which satisfy the users processing and storage requirements. Service based, distributed, grid and web 2.0 are some of the most famous computing technologies. Conversions are occurring towards less managements and maintenance issues and despite of that the usage experience should be increased. But there are some security concerns like security, access control, privacy & isolation based trusted service delivery raises due to the data in an outsourced environment. Thus, several policies are created to define its boundaries. Also the type of user accessing the data and the service provided by the cloud needs to be verified. Thus the uses trust over the system can go down if the interoperability and security of services are satisfactory. To providing confidentiality to users data encryption is the traditional options which require decryption for reading or retrieving the data. But in outsourced environment the user is frequently accessing its data which may increase the overhead of performing such frequent encryption and then decryptions. Also for performing any operations the data need to be decrypted. It is something treating as a complex usage boundary. Thus, Homomorphic encryption is used to deal with such situations. This paper proposes a novel Third Party and Homomorphic Encryption (TPA-HE based mechanism for secure computing. In this third party auditor and service provider is used for authentication and authorization of services & user profiles. It has three basic entities TPA, Cloud Service Provider, Encryption & Monitoring service to regularly analyze the security breaches in access & data transfer mechanism. To prove the effectiveness of suggested approach some of the results are taken which are better than the existing mechanism.

  16. Evaluation of emergency department performance

    DEFF Research Database (Denmark)

    Sørup, Christian Michel; Jacobsen, Peter; Forberg, Jakob Lundager

    2013-01-01

    Background Evaluation of emergency department (ED) performance remains a difficult task due to the lack of consensus on performance measures that reflects high quality, efficiency, and sustainability. Aim To describe, map, and critically evaluate which performance measures that the published...

  17. Criteria for performance evaluation

    Directory of Open Access Journals (Sweden)

    David J. Weiss

    2009-03-01

    Full Text Available Using a cognitive task (mental calculation and a perceptual-motor task (stylized golf putting, we examined differential proficiency using the CWS index and several other quantitative measures of performance. The CWS index (Weiss and Shanteau, 2003 is a coherence criterion that looks only at internal properties of the data without incorporating an external standard. In Experiment 1, college students (n = 20 carried out 2- and 3-digit addition and multiplication problems under time pressure. In Experiment 2, experienced golfers (n = 12, also college students, putted toward a target from nine different locations. Within each experiment, we analyzed the same responses using different methods. For the arithmetic tasks, accuracy information (mean absolute deviation from the correct answer, MAD using a coherence criterion was available; for golf, accuracy information using a correspondence criterion (mean deviation from the target, also MAD was available. We ranked the performances of the participants according to each measure, then compared the orders using Spearman's rextsubscript{s}. For mental calculation, the CWS order correlated moderately (rextsubscript{s} =.46 with that of MAD. However, a different coherence criterion, degree of model fit, did not correlate with either CWS or accuracy. For putting, the ranking generated by CWS correlated .68 with that generated by MAD. Consensual answers were also available for both experiments, and the rankings they generated correlated highly with those of MAD. The coherence vs. correspondence distinction did not map well onto criteria for performance evaluation.

  18. Airports’ Operational Performance and Efficiency Evaluation Based on Multicriteria Decision Analysis (MCDA and Data Envelopment Analysis (DEA Tools

    Directory of Open Access Journals (Sweden)

    João Jardim

    2015-12-01

    Full Text Available Airport benchmarking depends on airports’ operational performance and efficiency indicators, which are important for business agents, operational managers, regulatory agencies, airlines and passengers. There are several sets of single and complex indicators to evaluate airports’ performance and efficiency as well as several techniques to benchmark such infrastructures. The general aim of this work is twofold: to balance the data envelopment analysis (DEA and multicriteria decision analysis (MCDA tools and to show that airport benchmarking is also possible using a multicriteria decision analysis tool called Measuring Attractiveness by a Categorical Based Evaluation Technique (MACBETH. Whilst DEA measures the relative performance in the presence of multiple inputs and outputs, MCDA/ MACBETH uses performance and efficiency indicators to support benchmark results, being useful for evaluating the real importance and weight of the selected indicators. The work is structured as follows: first, a state-of-the-art review concerning either airport benchmarking and performance indicators or DEA and MCDA tool techniques; second, an overview of the impacts on airports’ operational performance and efficiency of emergent operational factors (sudden meteorological/natural phenomena; third, two case studies on a set of worldwide airports and Madeira (FNC Airport; and fourth, some insights into and challenges for future research that are still under development.

  19. Performance Evaluation of Mutation / Non- Mutation Based Classification With Missing Data

    Directory of Open Access Journals (Sweden)

    N.C. Vinod

    2013-02-01

    Full Text Available A common problem encountered by many data mining techniques is the missing data. A missing data is defined as an attribute or feature in a dataset which has no associated data value. Correct treatment of these data is crucial, as they have a negative impact on the interpretation and result of data mining processes. Missing value handling techniques can be grouped into four categories, namely,complete case analysis, Imputation methods, maximum likelihood methods and machine learning methods. Out of these imputation methods are the widely used solution for handling missing values. However, there are situations when imputation methods might not work correctly. This study studies and analyzes the performance of two algorithms, one imputation based and another without imputation basedclassification on missing data.

  20. PERFORMANCE EVALUATION OF AN EFFICIENT SINGLE EDGE TRIGGERED D FLIP FLOP BASED SHIFT REGISTERS USING CNTFET

    Directory of Open Access Journals (Sweden)

    Ravi.T

    2013-08-01

    Full Text Available Low power flip-flops are very important for low-power digital designs. Metal Oxide Semiconductor Field Effect Transistor (MOSFET devices have shrunk down to nanometer ranges. Due to the usage ofmillions of components and shrinking process technology, power consumption is drastically high in nano MOSFETs. Hence the paradigm has shifted to Carbon Nano Tube FET. In this paper, impact of 32nMMOSFET and 32nM CNTFET in the design of single edge triggered D-Flip Flop based shift registers are measured in terms of average power, delay, power delay product, rise time and fall time. MOSFET and CNTFET designs are simulated in 1GHz clock frequency and their performances are compared.

  1. Evaluation of User Performance in Simulation-Based Diagnostic Cerebral Angiography Training.

    Science.gov (United States)

    Zaika, Oleksiy; Nguyen, Ngan; Boulton, Mel; Eagleson, Roy; de Ribaupierre, Sandrine

    2016-01-01

    Simulation of anatomically complex procedures, such as angiography, is becoming more practical, however, computer-based modules require extensive research to assess their effectiveness. We organized two training schemas - alternating cases and consistent cases - and hypothesized that the alternating practice cases would be beneficial to test performance. Eight residents (4 radiology/4 neurosurgery) and 8 anatomy graduate students were trained on the SimbionixTM simulator in order to assess skill acquisition in diagnostic cerebral angiography over 8 sessions. We found that participants improve on total procedure time and total fluoroscopy time (p<0.05), but not on contrast injected or roadmaps created. There were no significant differences between alternating and consistent training types. Additional work needs to be done with higher sample numbers and visuospatial scores as criteria. PMID:27046624

  2. Performance Evaluation of Public Key Based Authentication in Future Mobile Communication Systems

    Directory of Open Access Journals (Sweden)

    Kambourakis Georgios

    2004-01-01

    Full Text Available While mobile hosts are evolving into full-IP enabled devices, there is a greater demand to provide a more flexible, reconfigurable, and scalable security mechanism in mobile communication systems beyond 3G (B3G. Work has already begun on such an “all-IP” end-to-end solution, commonly referred to as 4G systems. Fully fledged integration between heterogeneous networks, such as 2.5G, UMTS, WLAN, Bluetooth, and the Internet, demands fully compatible, time-tested, and reliable mechanisms to depend on. SSL protocol has proved its effectiveness in the wired Internet and it will probably be the most promising candidate for future wireless environments. In this paper, we discuss existing problems related to authentication and key agreement (AKA procedures, such as compromised authentication vectors attacks, as they appear in current 2/2.5G/3G mobile communication systems, and propose how SSL, combined with public key infrastructure (PKI elements, can be used to overcome these vulnerabilities. In this B3G environment, we perceive authentication as a service, which has to be performed at the higher protocol layers irrespective of the underlying network technology. Furthermore, we analyze the effectiveness of such a solution, based on measurements of a “prototype” implementation. Performance measurements indicate that SSL-based authentication can be possible in terms of service time in future wireless systems, while it can simultaneously provide both the necessary flexibility to network operators and a high level of confidence to end users.

  3. Cryptanalysis and Performance Evaluation of Enhanced Threshold Proxy Signature Scheme Based on RSA for Known Signers

    Directory of Open Access Journals (Sweden)

    Raman Kumar

    2013-01-01

    Full Text Available In these days there are plenty of signature schemes such as the threshold proxy signature scheme (Kumar and Verma 2010. The network is a shared medium so that the weakness security attacks such as eavesdropping, replay attack, and modification attack. Thus, we have to establish a common key for encrypting/decrypting our communications over an insecure network. In this scheme, a threshold proxy signature scheme based on RSA, any or more proxy signers can cooperatively generate a proxy signature while or fewer of them cannot do it. The threshold proxy signature scheme uses the RSA cryptosystem to generate the private and the public key of the signers (Rivest et al., 1978. Comparison is done on the basis of time complexity, space complexity, and communication overhead. We compare the performance of four schemes (Hwang et al. (2003, Kuo and Chen (2005, Yong-Jun et al. (2007, and Li et al. (2007, with the performance of a scheme that has been proposed earlier by the authors of this paper. In the proposed scheme, both the combiner and the secret share holder can verify the correctness of the information that they are receiving from each other. Therefore, the enhanced threshold proxy signature scheme is secure and efficient against notorious conspiracy attacks.

  4. Performance Evaluation of Individual Aircraft Based Advisory Concept for Surface Management

    Science.gov (United States)

    Gupta, Gautam; Malik, Waqar; Tobias, Leonard; Jung, Yoon; Hong, Ty; Hayashi, Miwa

    2013-01-01

    Surface operations at airports in the US are based on tactical operations, where departure aircraft primarily queue up and wait at the departure runways. NASA's Spot And Runway Departure Advisor (SARDA) tool was developed to address these inefficiencies through Air Traffic Control Tower advisories. The SARDA system is being updated to include collaborative gate hold, either tactically or strategically. This paper presents the results of the human-in-the-loop evaluation of the tactical gate hold version of SARDA in a 360 degree simulated tower setting. The simulations were conducted for the east side of the Dallas/Fort Worth airport. The new system provides gate hold, ground controller and local controller advisories based on a single scheduler. Simulations were conducted with SARDA on and off, the off case reflecting current day operations with no gate hold. Scenarios based on medium (1.2x current levels) and heavy (1.5x current levels) traffic were explored. Data collected from the simulation was analyzed for runway usage, delay for departures and arrivals, and fuel consumption. Further, Traffic Management Initiatives were introduced for a subset of the aircraft. Results indicated that runway usage did not change with the use of SARDA, i.e., there was no loss in runway throughput as compared to baseline. Taxiing delay was significantly reduced with the use of advisory by 45% in medium scenarios and 60% in heavy. Arrival delay was unaffected by the use of advisory. Total fuel consumption was also reduced by 23% in medium traffic and 33% in heavy. TMI compliance appeared unaffected by the advisory

  5. Performance Evaluation of SARDA: An Individual Aircraft-Based Advisory Concept for Surface Management

    Science.gov (United States)

    Jung, Yoon; Malik, Waqar; Tobias, Leonard; Gupta, Gautam; Hoang, Ty; Hayashi, Miwa

    2015-01-01

    Surface operations at airports in the US are based on tactical operations, where departure aircraft primarily queue up and wait at the departure runways. NASAs Spot And Runway Departure Advisor (SARDA) tool was developed to address these inefficiencies through Air Traffic Control Tower advisories. The SARDA system is being updated to include collaborative gate hold, either tactically or strategically. This paper presents the results of the human-in-the-loop evaluation of the tactical gate hold version of SARDA in a 360 degree simulated tower setting. The simulations were conducted for the east side of the Dallas-Fort Worth airport. The new system provides gate hold, ground controller and local controller advisories based on a single scheduler. Simulations were conducted with SARDA on and off, the off case reflecting current day operations with no gate hold. Scenarios based on medium (1.2x current levels) and heavy (1.5x current levels) traffic were explored. Data collected from the simulation was analyzed for runway usage, delay for departures and arrivals, and fuel consumption. Further, Traffic Management Initiatives were introduced for a subset of the aircraft. Results indicated that runway usage did not change with the use of SARDA, i.e., there was no loss in runway throughput as compared to baseline. Taxiing delay was significantly reduced with the use of advisory by 45 in medium scenarios and 60 in heavy. Arrival delay was unaffected by the use of advisory. Total fuel consumption was also reduced by 23 in medium traffic and 33 in heavy. TMI compliance appeared unaffected by the advisory.

  6. Performance Evaluations for IEEE 802.15.4-based IoT Smart Home Solution

    Directory of Open Access Journals (Sweden)

    Nga Dinh

    2016-09-01

    Full Text Available The Internet of Things (IoT is going to be a market-changing force for a variety of real-time applications such as e-healthcare, home automation, environmental monitoring, and industrial automation. Low power wireless communication protocols offering long lifetime and high reliability such as the IEEE 802.15.4 standard have been a key enabling technology for IoT deployments and are deployed for home automation recently. The issues of the IEEE 802.15.4 networks have moved from theory to real world deployments. The work presented herein intends to demonstrate the use of the IEEE 802.15.4 standard in recent IoT commercial products for smart home applications: the Smart Home Starter Kit. The contributions of the paper are twofold. First, the paper presents how the IEEE 802.15.4 standard is employed in Smart Home Starter Kit. In particular, network topology, network operations, and data transfer mode are investigated. Second, network performance metrics such as end-to-end (E2E delay and frame reception ratio (FRR are evaluated by experiments. In addition, the paper discusses several directions for future improvements of home automation commercial products.

  7. Performance Evaluation of Location-Based Geocast Routing using Directed Flooding Rectangular Forwarding Zone in City VANET

    OpenAIRE

    Akhtar Husain; Sharma, S. C.

    2015-01-01

    Vehicular ad hoc network (VANET) is an application of mobile ad hoc network (MANET) where vehicular nodes are integrated with GPS and other controlling devices to communicate among each other. Because of predefined structure of roads as well as very high moving speed of vehicles, routing becomes an extremely challenging issue in VANET. In literature, authors in research papers related to vehicular communication evaluate mostly the performance of topology or position-based routing protocols...

  8. Development of Innovative Aerogel Based Plasters: Preliminary Thermal and Acoustic Performance Evaluation

    Directory of Open Access Journals (Sweden)

    Cinzia Buratti

    2014-09-01

    Full Text Available The thermal and acoustic properties of innovative insulating systems used as building coatings were investigated: Granular silica aerogel was mixed with natural plaster in different percentages. This coating solution is transpiring and insulating, thanks to the use of a natural lime coat and aerogel, a highly porous light material with very low thermal conductivity. The thermal conductivity of the proposed solution was evaluated by means of a Heat Flow meter apparatus (EN ISO 12667, considering different percentages of aerogel. The natural plaster without aerogel has a thermal conductivity of about 0.50 W/m K; considering a percentage of granular aerogel of about 90% in volume, the thermal conductivity of the insulating natural coating falls to 0.050 W/m K. Increasing the percentage of granular aerogel, a value of about 0.018–0.020 W/m K can be reached. The acoustic properties were also evaluated in terms of the acoustic absorption coefficient, measured by means of a Kundt’s Tube (ISO 10534-2. Two samples composed by a plasterboard support, an insulation plaster with aerogel (thicknesses 10 mm and 30 mm respectively and a final coat were assembled. The results showed that the absorption coefficient strongly depends on the final coat, so the aerogel-based plaster layer moderately influences the final value. The application of this innovative solution can be a useful tool for new buildings, but also for the refurbishment of existing ones. This material is in development: until now, the best value of the thermal conductivity obtained from manufacturers is about 0.015 W/m K.

  9. Radar-based Flood Warning System for Houston, Texas and Its Performance Evaluation

    Science.gov (United States)

    Fang, N.; Bedient, P.

    2009-12-01

    Houston has a long history of flooding problems as a serious nature. For instance, Houstonians suffered from severe flood inundation during Tropical Storm Allison in 2001 and Hurricane Ike in 2008. Radar-based flood warning systems as non-structural tools to provide accurate and timely warnings to the public and private entities are greatly needed for urban areas prone to flash floods. Fortunately, the advent of GIS, radar-based rainfall estimation using NEXRAD, and real-time delivery systems on the internet have allowed flood alert systems to provide important advanced warning of impending flood conditions. Thus, emergency personnel can take proper steps to mitigate against catastrophic losses. The Rice and Texas Medical Center (TMC) Flood Alert System (FAS2) has been delivering warning information with 2 to 3 hours of lead time to facility personnel in a readily understood format for more than 40 events since 1997. The system performed well during these major rainfall events with R square value of 93%. The current system has been improved by incorporating a new hydraulic prediction tool - FloodPlain Map Library (FPML). The FPML module aims to provide visualized information such as floodplain maps and water surface elevations instead of just showing hydrographs in real time based on NEXRAD radar rainfall data. During Hurricane Ike (September, 2008), FAS2 successfully provided precise and timely flood warning information to TMC with the peak flow difference of 3.6% and the volume difference of 5.6%; timing was excellent for this double-peaked event. With the funding from the Texas Department of Transportation, a similar flood warning system has been developed at a critical transportation pass along Highway 288 in Houston, Texas. In order to enable emergency personnel to begin flood preparation with as much lead time as possible, FAS2 is being used as a prototype to develop warning system for other flood-prone areas such as City of Sugar Land.

  10. Financial access to health care in Karuzi, Burundi: a household-survey based performance evaluation

    Directory of Open Access Journals (Sweden)

    Van Herp Michel

    2009-10-01

    Full Text Available Abstract Background In 2003, Médecins Sans Frontières, the provincial government, and the provincial health authority began a community project to guarantee financial access to primary health care in Karuzi province, Burundi. The project used a community-based assessment to provide exemption cards for indigent households and a reduced flat fee for consultations for all other households. Methods An evaluation was carried out in 2005 to assess the impact of this project. Primary data collection was through a cross-sectional household survey of the catchment areas of 10 public health centres. A questionnaire was used to determine the accuracy of the community-identification method, households' access to health care, and costs of care. Household socioeconomic status was determined by reported expenditures and access to land. Results Financial access to care at the nearest health centre was ensured for 70% of the population. Of the remaining 30%, half experienced financial barriers to access and the other half chose alternative sites of care. The community-based assessment increased the number of people of the population who qualified for fee exemptions to 8.6% but many people who met the indigent criteria did not receive a card. Eighty-eight percent of the population lived under the poverty threshold. Referring to the last sickness episode, 87% of households reported having no money available and 25% risked further impoverishment because of healthcare costs even with the financial support system in place. Conclusion The flat fee policy was found to reduce cost barriers for some households but, given the generalized poverty in the area, the fee still posed a significant financial burden. This report showed the limits of a programme of fee exemption for indigent households and a flat fee for others in a context of widespread poverty.

  11. Performance Evaluation of Different Network Topologies Based On Ant Colony Optimization

    Directory of Open Access Journals (Sweden)

    Joydip Dhar

    2010-11-01

    Full Text Available All networks tend to become more and more complicated. They can be wired, with lots of routers, orwireless, with lots of mobile node. The problem remains the same, in order to get the best from thenetwork; there is a need to find the shortest path. The more complicated the network is, the more difficultit is to manage the routes and indicate which one is the best. The Nature gives us a solution to find theshortest path. The ants, in their necessity to find food and brings it back to the nest, manage not only toexplore a vast area, but also to indicate to their peers the location of the food while bringing it back tothe nest. Most of the time, they will find the shortest path and adapt to ground changes, hence provingtheir great efficiency toward this difficult task. The purpose of this paper is to evaluate the performanceof different network topologies based on Ant Colony Optimization Algorithm. Simulation is done in NS-2.

  12. Evaluating the spatio-temporal performance of sky imager based solar irradiance analysis and forecasts

    Directory of Open Access Journals (Sweden)

    T. Schmidt

    2015-10-01

    Full Text Available Clouds are the dominant source of variability in surface solar radiation and uncertainty in its prediction. However, the increasing share of solar energy in the world-wide electric power supply increases the need for accurate solar radiation forecasts. In this work, we present results of a shortest-term global horizontal irradiance (GHI forecast experiment based on hemispheric sky images. A two month dataset with images from one sky imager and high resolutive GHI measurements from 99 pyranometers distributed over 10 km by 12 km is used for validation. We developed a multi-step model and processed GHI forecasts up to 25 min with an update interval of 15 s. A cloud type classification is used to separate the time series in different cloud scenarios. Overall, the sky imager based forecasts do not outperform the reference persistence forecasts. Nevertheless, we find that analysis and forecast performance depend strongly on the predominant cloud conditions. Especially convective type clouds lead to high temporal and spatial GHI variability. For cumulus cloud conditions, the analysis error is found to be lower than that introduced by a single pyranometer if it is used representatively for the whole area in distances from the camera larger than 1–2 km. Moreover, forecast skill is much higher for these conditions compared to overcast or clear sky situations causing low GHI variability which is easier to predict by persistence. In order to generalize the cloud-induced forecast error, we identify a variability threshold indicating conditions with positive forecast skill.

  13. Performance evaluation of a routing algorithm based on Hopfield Neural Network for network-on-chip

    Science.gov (United States)

    Esmaelpoor, Jamal; Ghafouri, Abdollah

    2015-12-01

    Network on chip (NoC) has emerged as a solution to overcome the system on chip growing complexity and design challenges. A proper routing algorithm is a key issue of an NoC design. An appropriate routing method balances load across the network channels and keeps path length as short as possible. This survey investigates the performance of a routing algorithm based on Hopfield Neural Network. It is a dynamic programming to provide optimal path and network monitoring in real time. The aim of this article is to analyse the possibility of using a neural network as a router. The algorithm takes into account the path with the lowest delay (cost) form source to destination. In other words, the path a message takes from source to destination depends on network traffic situation at the time and it is the fastest one. The simulation results show that the proposed approach improves average delay, throughput and network congestion efficiently. At the same time, the increase in power consumption is almost negligible.

  14. Design and Performance Evaluation of Optical Ethernet Switching Architecture with Liquid Crystal on Silicon-Based Beam-Steering Technology

    Science.gov (United States)

    Cheng, Yuh-Jiuh; Chou, H.-H.; Shiau, Yhi; Cheng, Shu-Ying

    2016-07-01

    A non-blocking optical Ethernet switching architecture with liquid crystal on a silicon-based beam-steering switch and optical output buffer strategies are proposed. For preserving service packet sequencing and fairness of routing sequence, priority and round-robin algorithms are adopted at the optical output buffer in this research. Four methods were used to implement tunable fiber delay modules for the optical output buffers to handle Ethernet packets with variable bit-rates. The results reported are based on the simulations performed to evaluate the proposed switching architecture with traffic analysis under a traffic model captured from a real-core network.

  15. Based on Regular Expression Matching of Evaluation of the Task Performance in WSN: A Queue Theory Approach

    Directory of Open Access Journals (Sweden)

    Jie Wang

    2014-01-01

    Full Text Available Due to the limited resources of wireless sensor network, low efficiency of real-time communication scheduling, poor safety defects, and so forth, a queuing performance evaluation approach based on regular expression match is proposed, which is a method that consists of matching preprocessing phase, validation phase, and queuing model of performance evaluation phase. Firstly, the subset of related sequence is generated in preprocessing phase, guiding the validation phase distributed matching. Secondly, in the validation phase, the subset of features clustering, the compressed matching table is more convenient for distributed parallel matching. Finally, based on the queuing model, the sensor networks of task scheduling dynamic performance are evaluated. Experiments show that our approach ensures accurate matching and computational efficiency of more than 70%; it not only effectively detects data packets and access control, but also uses queuing method to determine the parameters of task scheduling in wireless sensor networks. The method for medium scale or large scale distributed wireless node has a good applicability.

  16. Making Performance-Based Evaluation Work for You: A Recipe for Personal Learning

    Science.gov (United States)

    Church, Audrey

    2012-01-01

    Teacher observation and teacher evaluation are a given in American schools, and Charlotte Danielson's work in teacher effectiveness and professional practice has guided evaluation efforts for many years. There is a new, big kid in town, however. As Race to the Top requires documentation of student growth, and research shows that teacher…

  17. More Bias in Performance Evaluation?

    Science.gov (United States)

    Gallagher, Michael C.

    1978-01-01

    The results of this study indicate that a single performance evaluation should not be used for different purposes since the stated purpose of the evaluation can affect the actual performance rating. (Author/IRT)

  18. Multi-directional efficiency analysis-based regional industrial environmental performance evaluation of China

    OpenAIRE

    Ke Wang; Shiwei Yu; Mo-Jie Li; Yi-Ming Wei

    2013-01-01

    This study evaluates the environmental efficiency of industrial sectors of Chinese major cities. The Multi-directional efficiency analysis (MEA) approach are utilized for evaluation, thus both the integrated MEA efficiency levels and the efficiency patterns, which are represented by the variable specific MEA efficiency according to each type of the industrial pollutant emission or discharge, of Chinese major city are detected. In addition the industrial energy conservation and pollutant reduc...

  19. Experimental evaluation of high performance base course and road base asphalt concrete with electric arc furnace steel slags.

    Science.gov (United States)

    Pasetto, Marco; Baldo, Nicola

    2010-09-15

    The paper presents the results of a laboratory study aimed at verifying the use of two types of electric arc furnace (EAF) steel slags as substitutes for natural aggregates, in the composition of base course and road base asphalt concrete (BBAC) for flexible pavements. The trial was composed of a preliminary study of the chemical, physical, mechanical and leaching properties of the EAF steel slags, followed by the mix design and performance characterization of the bituminous mixes, through gyratory compaction tests, permanent deformation tests, stiffness modulus tests at various temperatures, fatigue tests and indirect tensile strength tests. All the mixtures with EAF slags presented better mechanical characteristics than those of the corresponding asphalts with natural aggregate and satisfied the requisites for acceptance in the Italian road sector technical standards, thus resulting as suitable for use in road construction. PMID:20566237

  20. Experimental evaluation of high performance base course and road base asphalt concrete with electric arc furnace steel slags.

    Science.gov (United States)

    Pasetto, Marco; Baldo, Nicola

    2010-09-15

    The paper presents the results of a laboratory study aimed at verifying the use of two types of electric arc furnace (EAF) steel slags as substitutes for natural aggregates, in the composition of base course and road base asphalt concrete (BBAC) for flexible pavements. The trial was composed of a preliminary study of the chemical, physical, mechanical and leaching properties of the EAF steel slags, followed by the mix design and performance characterization of the bituminous mixes, through gyratory compaction tests, permanent deformation tests, stiffness modulus tests at various temperatures, fatigue tests and indirect tensile strength tests. All the mixtures with EAF slags presented better mechanical characteristics than those of the corresponding asphalts with natural aggregate and satisfied the requisites for acceptance in the Italian road sector technical standards, thus resulting as suitable for use in road construction.

  1. Experimental performance evaluation of software defined networking (SDN) based data communication networks for large scale flexi-grid optical networks.

    Science.gov (United States)

    Zhao, Yongli; He, Ruiying; Chen, Haoran; Zhang, Jie; Ji, Yuefeng; Zheng, Haomian; Lin, Yi; Wang, Xinbo

    2014-04-21

    Software defined networking (SDN) has become the focus in the current information and communication technology area because of its flexibility and programmability. It has been introduced into various network scenarios, such as datacenter networks, carrier networks, and wireless networks. Optical transport network is also regarded as an important application scenario for SDN, which is adopted as the enabling technology of data communication networks (DCN) instead of general multi-protocol label switching (GMPLS). However, the practical performance of SDN based DCN for large scale optical networks, which is very important for the technology selection in the future optical network deployment, has not been evaluated up to now. In this paper we have built a large scale flexi-grid optical network testbed with 1000 virtual optical transport nodes to evaluate the performance of SDN based DCN, including network scalability, DCN bandwidth limitation, and restoration time. A series of network performance parameters including blocking probability, bandwidth utilization, average lightpath provisioning time, and failure restoration time have been demonstrated under various network environments, such as with different traffic loads and different DCN bandwidths. The demonstration in this work can be taken as a proof for the future network deployment. PMID:24787842

  2. Experimental performance evaluation of software defined networking (SDN) based data communication networks for large scale flexi-grid optical networks.

    Science.gov (United States)

    Zhao, Yongli; He, Ruiying; Chen, Haoran; Zhang, Jie; Ji, Yuefeng; Zheng, Haomian; Lin, Yi; Wang, Xinbo

    2014-04-21

    Software defined networking (SDN) has become the focus in the current information and communication technology area because of its flexibility and programmability. It has been introduced into various network scenarios, such as datacenter networks, carrier networks, and wireless networks. Optical transport network is also regarded as an important application scenario for SDN, which is adopted as the enabling technology of data communication networks (DCN) instead of general multi-protocol label switching (GMPLS). However, the practical performance of SDN based DCN for large scale optical networks, which is very important for the technology selection in the future optical network deployment, has not been evaluated up to now. In this paper we have built a large scale flexi-grid optical network testbed with 1000 virtual optical transport nodes to evaluate the performance of SDN based DCN, including network scalability, DCN bandwidth limitation, and restoration time. A series of network performance parameters including blocking probability, bandwidth utilization, average lightpath provisioning time, and failure restoration time have been demonstrated under various network environments, such as with different traffic loads and different DCN bandwidths. The demonstration in this work can be taken as a proof for the future network deployment.

  3. A Distance Instructional System with Learning Performance Evaluation Mechanism: Moodle-Based Educational System Design

    Science.gov (United States)

    Lee, Ying-Chen; Terashima, Nobuyoshi

    2012-01-01

    In this paper, a Moodle-based educational system has been constructed by providing friendly interface to fit most students in e-learning. For the website implementation, the authors take the course "Multimedia Implementation Using JAVA" as a case study. From the modified Moodle-based educational system, the browsing time of each web page for…

  4. Performance Evaluation of Joint Path and Spectrum Diversity Based Routing Protocol in Cognitive Radio Ad Hoc Networks under Critical Conditions

    Directory of Open Access Journals (Sweden)

    Zamree Che-Aron

    2015-06-01

    Full Text Available Cognitive Radio (CR technology has been introduced to solve the problems of spectrum underutilization and spectrum scarcity caused by improper spectrum management policies. The main concept of Cognitive Radio Ad Hoc Network (CRAHN is that, in a wireless ad hoc network, the unlicensed users (or Secondary Users (SUs are allowed to access the temporally unused licensed spectrum bands for data communications without harmful interference to the licensed users (or Primary Users (PUs. In CRAHNs, the mobile SUs communicate with each other without the use of any centralized network infrastructure. Routing in CRAHNs is an important task and faces various challenges including PU interference, frequent network topology changes, energy constraint, volatile bandwidth and fragile connectivity. In this study, an attempt is made to evaluate the performance of the Dual Diversity Cognitive Ad-hoc Routing Protocol (D2CARP in CRAHNs under critical conditions, i.e., high node mobility rate and number of PUs. The D2CARP protocol is a joint path and spectrum diversity based routing protocol for CRAHNs. The performance evaluation is conducted through simulation using NS-2 simulator. The performance metrics to be considered include average throughput, percentage of packet loss, average end-to-end delay and average jitter. The simulation results prove that the protocol performance is significantly affected in the networks with high number of PUs and mobility rate, leading to high path failure rate and severe service outages.

  5. A DEA-TOPSIS-based approach for performance evaluation of Indian technical institutes

    Directory of Open Access Journals (Sweden)

    Amrita Bhattacharyya

    2014-06-01

    Full Text Available Since independence, India has been one of the few developing countries to invest extensively in both science and technical education. In India, technical education plays a pivotal role in human resource development while creating skilled manpower, increasing industrial productivity and enhancing the quality of life. If a technical institute means to be effective in developing learned and qualified engineers, then it would be useful to know the performance of that technical institution. However, measuring the performance of a technical institution has received very little attention because it is very difficult to measure its output. Thus, this paper focuses on assessing the performance of eight Indian Institutes of Technology (IITs using a combined approach of data envelopment analysis (DEA and technique of order preference by similarity to ideal solution (TOPSIS. In the first phase, DEA is applied to shortlist the efficient IITs having the desired characteristics from the stakeholders’ point of view, and TOPSIS method is then employed to rank those efficient IITs while also identifying the best performing IIT. It is observed that IIT Kharagpur outperforms all the considered IITs which exactly corroborates with the findings of the recently published surveys/reports.

  6. Performance evaluation of ICN/CCN based service migration approach in virtualized LTE systems

    NARCIS (Netherlands)

    Satria, Triadimas; Karimzadeh, Morteza; Karagiannis, Georgios

    2014-01-01

    The continuous growth in using mobile devices (e.g. smart phones, tablets, etc.) has increased the complexity in provisioning cellular network resources. Applying the cloud computing model in LTE (Long Term Evolution) systems could be a good solution to increase LTE’s performance by building a share

  7. An Empirical Analysis of Performance Evaluation of University Teachers Based on KPI

    Directory of Open Access Journals (Sweden)

    Zhu Chuanshu

    2015-01-01

    Full Text Available Except for the influential graduates, the content of the development core of universities needs to improve the scientific allocation of teacher resources, and the most relevant content to human resource of teacher is the salary incentive system. While the system related to performance appraisal system is the perfor-mance assessment system, so the sound and perfect performance appraisal system of teachers in Colleges and universities is conducive to the strategic development of university. This article uses KPI theory in index design for quality content of university teachers, aiming at abstracting the key quality therefrom, constructing KPI performance appraisal system complying to 80/20 and provide theoretical basis for improvement of human resources system in Colleges and promotion of the development of universities. This article provides five key types of quality of college teachers and refinable, quantifiable and behavioral key qualities, and conducts an empirical demonstration of weight of the corresponding index by the questionnaire survey, expert interview and AHP analysis method.

  8. EVALUATION OF PERFORMANCE OF HORIZONTAL AXIS WIND TURBINE BLADES BASED ON OPTIMAL ROTOR THEORY

    Directory of Open Access Journals (Sweden)

    Nitin Tenguria

    2011-06-01

    Full Text Available Wind energy is a very popular renewable energy resource. In order to increase the use of wind energy, it is important to develop wind turbine rotor with high rotations rates and power coefficient. In this paper, a method for the determination of the aerodynamic performance characteristics using NACA airfoils is given for three bladed horizontal axis wind turbine. Blade geometry is obtained from the best approximation of the calculated theoretical optimum chord and twist distribution of the rotating blade. Optimal rotor theory is used, which is simple enough and accurate enough for rotor design. In this work, eight different airfoils are used to investigate the changes in performance of the blade. Rotor diameter taken is 82 m which is the diameter of VESTAS V82-1.65MW. The airfoils taken are same from root to tip in every blade. The design lift coefficient taken is 1.1. A computer program is generated to automate the complete procedure.

  9. EVALUATION OF PERFORMANCE OF HORIZONTAL AXIS WIND TURBINE BLADES BASED ON OPTIMAL ROTOR THEORY

    Directory of Open Access Journals (Sweden)

    Nitin Tenguria

    2011-01-01

    Full Text Available Wind energy is a very popular renewable energy resource. In order to increase the use of wind energy, it is important to develop wind turbine rotor with high rotations rates and power coefficient. In this paper, a method for the determination of the aerodynamic performance characteristics using NACA airfoils is given for three bladed horizontal axis wind turbine. Blade geometry is obtained from the best approximation of the calculated theoretical optimum chord and twist distribution of the rotating blade. Optimal rotor theory is used, which is simple enough and accurate enough for rotor design. In this work, eight different airfoils are used to investigate the changes in performance of the blade. Rotor diameter taken is 82 m which is the diameter of VESTAS V82-1.65MW. The airfoils taken are same from root to tip in every blade. The design lift coefficient taken is 1.1. A computer program is generated to automate the complete procedure.

  10. Simulation-Based Performance Evaluation of Routing Protocols in Vehicular Ad-hoc Network

    OpenAIRE

    Vaishali D. Khairnar; Kotecha, Dr. Ketan

    2013-01-01

    A Vehicular Ad-hoc Network (VANET) is a collection of wireless vehicle nodes forming a temporary network without using any centralized Road Side Unit (RSU). VANET protocols have to face high challenges due to dynamically changing topologies and symmetric links of networks. A suitable and effective routing mechanism helps to extend the successful deployment of vehicular ad-hoc networks. An attempt has been made to compare the performance of two On-demand reactive routing protocols namely AODV ...

  11. Evaluation of the Parallel Computing Performances based on the nVIDIA GeForce GPU

    OpenAIRE

    Bogdanoski, Mitko; Gjorgjev, Jelena

    2015-01-01

    Parallel programming is a form of computation in which the calculations are carried out simultaneously, operating on the principle where large problems can be divided into smaller, which are then solved in parallel. Most common this programming is used in high performance computing, but due to the physical constraints which prevent frequency scaling the interest is even higher. As computers consumption has become a problem in the recent years, the parallel programming has grown into the do...

  12. Development of a fuel performance model for evaluating conceptual Th-based Canadian SCWR fuel designs

    International Nuclear Information System (INIS)

    The fuel assembly for the Canadian Super Critical Water Reactor (SCWR) is in the conceptual design phase. The proposed fuel pellets are made of ceramic Th-Pu mixed oxide ((Th,Pu)O2). Neutronics and thermal hydraulics calculations are being undertaken by the nuclear industry to optimize the fuel assembly within a pressure tube. The SCWR working group shave established two conceptual fuel element designs (outer diameter, fuel composition, cladding material, exit burnup etc.) within an assembly for performance assessment. A detailed fuel element performance assessment under in-reactor conditions could be used to determine cladding material thickness/suitability and to optimize the fuel pellet geometry. This work reports the development of a fuel performance model to predict the behaviour of the Canadian SCWR fuel using the finite element method. An initial approach is to develop a thorium-uranium mixed-oxide ((Th,U)O2) model.Preliminary results from this model agree with fuel irradiation data . Uranium dioxide (UO2) fuel, under the same conditions, is also being modeled and compared. A plan to model (Th, Pu)O2 SCWR fuel is briefly presented here. (author)

  13. Evaluation and performance based mix design of rubber modified mixtures: Laboratory evaluation of asphalt concrete mixtures using waste tires. Final report

    Energy Technology Data Exchange (ETDEWEB)

    Goulias, D.G.; Ali, A.H.M.

    1997-02-01

    New Jersey Department of Transportation has been investigating the use of rubber modified materials over the last few years with the design and use of dense and gap graded mixtures, and in some cases the incorporation of RAP materials, in selected projects. While the short term field performance of these materials is satisfactory, their long term performance is unknown. These mixtures were designed with the traditional Marshall mixture design method, and thus is was not considered design criteria related to mixture behavior and performance into mixture selection. The main objective of this study is the development of a mixture design methodology for rubber modified materials that considers mixture behavior and performance. In order to achieve this objective researchers conducted a laboratory investigation which was able to evaluate mixture properties that can be related to mixture performance, (in terms of rutting, low temperature cracking, and fatigue), and simulating the actual field loading conditions that the material is being exposed to. The possibility of coupling the traditional Marshall mix design method with parameters related to mixture behavior and performance was investigated since this technique has been used over the years by the agency, and the necessary testing apparatus is available to both the agency and material laboratories. The SHRP SUPERPAVE mix design methodology was reviewed and considered in this study for the development of an integrated performance based design procedure. However, its applicability and use on routine bases was not considered at this time since it requires specific equipment with ongoing evaluation for its repeatability and precision. Finally, for the conduct of this investigation materials and mixtures used by NJDOT in rubber modified paving projects were used.

  14. PERFORMANCE EVALUATION OF DIFFERENT GROUND FILTERING ALGORITHMS FOR UAV-BASED POINT CLOUDS

    Directory of Open Access Journals (Sweden)

    C. Serifoglu

    2016-06-01

    Full Text Available Digital Elevation Model (DEM generation is one of the leading application areas in geomatics. Since a DEM represents the bare earth surface, the very first step of generating a DEM is to separate the ground and non-ground points, which is called ground filtering. Once the point cloud is filtered, the ground points are interpolated to generate the DEM. LiDAR (Light Detection and Ranging point clouds have been used in many applications thanks to their success in representing the objects they belong to. Hence, in the literature, various ground filtering algorithms have been reported to filter the LiDAR data. Since the LiDAR data acquisition is still a costly process, using point clouds generated from the UAV images to produce DEMs is a reasonable alternative. In this study, point clouds with three different densities were generated from the aerial photos taken from a UAV (Unmanned Aerial Vehicle to examine the effect of point density on filtering performance. The point clouds were then filtered by means of five different ground filtering algorithms as Progressive Morphological 1D (PM1D, Progressive Morphological 2D (PM2D, Maximum Local Slope (MLS, Elevation Threshold with Expand Window (ETEW and Adaptive TIN (ATIN. The filtering performance of each algorithm was investigated qualitatively and quantitatively. The results indicated that the ATIN and PM2D algorithms showed the best overall ground filtering performances. The MLS and ETEW algorithms were found as the least successful ones. It was concluded that the point clouds generated from the UAVs can be a good alternative for LiDAR data.

  15. Performance Evaluation of Different Ground Filtering Algorithms for Uav-Based Point Clouds

    Science.gov (United States)

    Serifoglu, C.; Gungor, O.; Yilmaz, V.

    2016-06-01

    Digital Elevation Model (DEM) generation is one of the leading application areas in geomatics. Since a DEM represents the bare earth surface, the very first step of generating a DEM is to separate the ground and non-ground points, which is called ground filtering. Once the point cloud is filtered, the ground points are interpolated to generate the DEM. LiDAR (Light Detection and Ranging) point clouds have been used in many applications thanks to their success in representing the objects they belong to. Hence, in the literature, various ground filtering algorithms have been reported to filter the LiDAR data. Since the LiDAR data acquisition is still a costly process, using point clouds generated from the UAV images to produce DEMs is a reasonable alternative. In this study, point clouds with three different densities were generated from the aerial photos taken from a UAV (Unmanned Aerial Vehicle) to examine the effect of point density on filtering performance. The point clouds were then filtered by means of five different ground filtering algorithms as Progressive Morphological 1D (PM1D), Progressive Morphological 2D (PM2D), Maximum Local Slope (MLS), Elevation Threshold with Expand Window (ETEW) and Adaptive TIN (ATIN). The filtering performance of each algorithm was investigated qualitatively and quantitatively. The results indicated that the ATIN and PM2D algorithms showed the best overall ground filtering performances. The MLS and ETEW algorithms were found as the least successful ones. It was concluded that the point clouds generated from the UAVs can be a good alternative for LiDAR data.

  16. Output Effect Evaluation Based on Input Features in Neural Incremental Attribute Learning for Better Classification Performance

    Directory of Open Access Journals (Sweden)

    Ting Wang

    2015-01-01

    Full Text Available Machine learning is a very important approach to pattern classification. This paper provides a better insight into Incremental Attribute Learning (IAL with further analysis as to why it can exhibit better performance than conventional batch training. IAL is a novel supervised machine learning strategy, which gradually trains features in one or more chunks. Previous research showed that IAL can obtain lower classification error rates than a conventional batch training approach. Yet the reason for that is still not very clear. In this study, the feasibility of IAL is verified by mathematical approaches. Moreover, experimental results derived by IAL neural networks on benchmarks also confirm the mathematical validation.

  17. A novel hybrid MCDM model for performance evaluation of research and technology organizations based on BSC approach.

    Science.gov (United States)

    Varmazyar, Mohsen; Dehghanbaghi, Maryam; Afkhami, Mehdi

    2016-10-01

    Balanced Scorecard (BSC) is a strategic evaluation tool using both financial and non-financial indicators to determine the business performance of organizations or companies. In this paper, a new integrated approach based on the Balanced Scorecard (BSC) and multi-criteria decision making (MCDM) methods are proposed to evaluate the performance of research centers of research and technology organization (RTO) in Iran. Decision-Making Trial and Evaluation Laboratory (DEMATEL) are employed to reflect the interdependencies among BSC perspectives. Then, Analytic Network Process (ANP) is utilized to weight the indices influencing the considered problem. In the next step, we apply four MCDM methods including Additive Ratio Assessment (ARAS), Complex Proportional Assessment (COPRAS), Multi-Objective Optimization by Ratio Analysis (MOORA), and Technique for Order Preference by Similarity to Ideal Solution (TOPSIS) for ranking of alternatives. Finally, the utility interval technique is applied to combine the ranking results of MCDM methods. Weighted utility intervals are computed by constructing a correlation matrix between the ranking methods. A real case is presented to show the efficacy of the proposed approach. PMID:27371786

  18. A novel hybrid MCDM model for performance evaluation of research and technology organizations based on BSC approach.

    Science.gov (United States)

    Varmazyar, Mohsen; Dehghanbaghi, Maryam; Afkhami, Mehdi

    2016-10-01

    Balanced Scorecard (BSC) is a strategic evaluation tool using both financial and non-financial indicators to determine the business performance of organizations or companies. In this paper, a new integrated approach based on the Balanced Scorecard (BSC) and multi-criteria decision making (MCDM) methods are proposed to evaluate the performance of research centers of research and technology organization (RTO) in Iran. Decision-Making Trial and Evaluation Laboratory (DEMATEL) are employed to reflect the interdependencies among BSC perspectives. Then, Analytic Network Process (ANP) is utilized to weight the indices influencing the considered problem. In the next step, we apply four MCDM methods including Additive Ratio Assessment (ARAS), Complex Proportional Assessment (COPRAS), Multi-Objective Optimization by Ratio Analysis (MOORA), and Technique for Order Preference by Similarity to Ideal Solution (TOPSIS) for ranking of alternatives. Finally, the utility interval technique is applied to combine the ranking results of MCDM methods. Weighted utility intervals are computed by constructing a correlation matrix between the ranking methods. A real case is presented to show the efficacy of the proposed approach.

  19. Performance Evaluation of a Simple Cluster-Based Aggregation and Routing in Wireless Sensor Networks

    OpenAIRE

    Hong, Sung-Hwa; Park, Jeong-Min; Gil, Joon-Min

    2013-01-01

    In future ubiquitous networks, sensor nodes should collect various environmental data and parameters. Because sensor nodes tend to have small and often irreplaceable batteries with limited power capacity, energy-efficient aggregation and routing are essential to achieve to a prolonged network lifetime. We propose a simple cluster-based data aggregation and routing algorithm (SCAR) that decreases the incurred overhead during the selection of cluster heads in wireless sensor networks. The perfo...

  20. PERFORMANCE EVALUATION OF CLUSTERING IN WEB-LOG ANALYSIS BASED ON AGENT

    Directory of Open Access Journals (Sweden)

    Himani

    2012-06-01

    Full Text Available Web mining is the use of data mining Technique toautomatically discover & extract information from webdocuments. When user searches for goods the managementagent receives order from graphical user interface.Management agent receives information, update agentinformation store house and feedback the mining result touser. Intelligent agent can help making computer systemeasier to use, enable finding & filtering information. Themining agent is the analytical center of whole agentsystem.It mainly adopts two kind of analytical method:related rule mining and cluster analysis. Cluster of objectsare formed so that objects with in a cluster have highsimilarity. The aim of this paper is to analyze the web logdata .To achieve this clustering tool is used. It performs intwo phases. First it captures the web-log data. Then itanalyzes the data& discovers the hidden pattern. Agentrequires an agent communication language to describe &process agent request. The future internet will use PERL toencode information with meaningful structure & semantics.

  1. RAROC Based Capital Budgeting and Performance Evaluation: A Case Study of Bank Capital Allocation

    OpenAIRE

    Christopher James

    1996-01-01

    This paper describes the RAROC system developed at Bank of America (B of A) in order to examine how risk-based capital allocation models work. I begin by discussing the economic rational for allocating capital in a diversified organization like the B of A. Drawing on recent work by Froot and Stein (1995) and Stein (1996), I argue that the capital budgeting process used by the B of A resembles the operation of an internal capital market in which businesses are allocated capital with the object...

  2. Design and performance evaluation of a state-space based AQM

    CERN Document Server

    Ariba, Yassine; Gouaisbaut, Frédéric; 10.1109/CTRQ.2008.15

    2009-01-01

    Recent research has shown the link between congestion control in communication networks and feedback control system. In this paper, the design of an active queue management (AQM) which can be viewed as a controller, is considered. Based on a state space representation of a linearized fluid flow model of TCP, the AQM design is converted to a state feedback synthesis problem for time delay systems. Finally, an example extracted from the literature and simulations via a network simulator NS (under cross traffic conditions) support our study.

  3. Performance evaluation of a web-based system to exchange Electronic Health Records using Queueing model (M/M/1).

    Science.gov (United States)

    de la Torre, Isabel; Díaz, Francisco Javier; Antón, Míriam; Martínez, Mario; Díez, José Fernando; Boto, Daniel; López, Miguel; Hornero, Roberto; López, María Isabel

    2012-04-01

    Response time measurement of a web-based system is essential to evaluate its performance. This paper shows a comparison of the response times of a Web-based system for Ophthalmologic Electronic Health Records (EHRs), TeleOftalWeb. It makes use of different database models like Oracle 10 g, dbXML 2.0, Xindice 1.2, and eXist 1.1.1. The system's modelling, which uses Tandem Queue networks, will allow us to estimate the service times of the different components of the system (CPU, network and databases). In order to calculate those times, associated to the different databases, benchmarking techniques are used. The final objective of the comparison is to choose the database system resulting in the lowest response time to TeleOftalWeb and to compare the obtained results using a new benchmarking. PMID:20703642

  4. Performance evaluation of a web-based system to exchange Electronic Health Records using Queueing model (M/M/1).

    Science.gov (United States)

    de la Torre, Isabel; Díaz, Francisco Javier; Antón, Míriam; Martínez, Mario; Díez, José Fernando; Boto, Daniel; López, Miguel; Hornero, Roberto; López, María Isabel

    2012-04-01

    Response time measurement of a web-based system is essential to evaluate its performance. This paper shows a comparison of the response times of a Web-based system for Ophthalmologic Electronic Health Records (EHRs), TeleOftalWeb. It makes use of different database models like Oracle 10 g, dbXML 2.0, Xindice 1.2, and eXist 1.1.1. The system's modelling, which uses Tandem Queue networks, will allow us to estimate the service times of the different components of the system (CPU, network and databases). In order to calculate those times, associated to the different databases, benchmarking techniques are used. The final objective of the comparison is to choose the database system resulting in the lowest response time to TeleOftalWeb and to compare the obtained results using a new benchmarking.

  5. Performance Evaluation of Reactive, Proactive and Hybrid Routing Protocols Based on Network Size for MANET

    Directory of Open Access Journals (Sweden)

    Dr. Ritika

    2012-02-01

    Full Text Available Ad hoc network is a collection of wireless mobile nodes where wireless radio interface connectseach device in a MANET to move freely, independently and randomly. Routing protocols inmobile ad hoc network helps to communicate source node with destination node by sending andreceiving packets. Lots of protocols are developed in this field but it is not easier to decide whichone is winner. In this paper, we present investigations on the behavior of five routing protocolsAODV (Ad hoc On demand distance vector, DSR (Dynamic Source Routing, DYMO (DynamicMANET On demand, OLSR (Optimized link state routing and ZRP (Zone routing protocolbased on IEEE 802.11CSMA/CA MAC protocol are analyzed and compared using QualNetsimulator on the basis of performance metrics such as Average Jitter, Total Packets Received,Packet Delivery Ratio, End-to-End Delay, Throughput, Average Queue Length, Average time inQueue, dropped packets due to non availability of routes and Energy consumption in transmit andreceive Mode. To test competence and effectiveness of all five protocols under diverse networkscenarios costing is done by means varying load by varying CBR data traffic load, changingnumber of Nodes and mobility. Finally results are scrutinized in from different scenarios to providequalitative assessment of the applicability of the protocols.

  6. Sensor Network-Based Localization for Continuous Tracking Applications: Implementation and Performance Evaluation

    Directory of Open Access Journals (Sweden)

    Franco Davoli

    2008-10-01

    Full Text Available The increasing interest in systems able to provide users with immersive services (e.g., domotics, context-aware applications, and immersive distance learning tools has encouraged the development of cheap and effective platforms aimed at tracking objects and people within a certain space. In this context, wireless sensor networks (WSNs can play a very important role, since specialized sensors can be fruitfully exploited in order to generate/receive signals by means of which the WSN can derive the position of nodes joined to the objects to be tracked. The paper presents an original localization platform that exploits a single-hop WSN, based on a Microchip MCU and a Cypress RF device, to track its moving nodes. Specifically, the nodes of the network are divided into three sets: the first set consists of anchor nodes that, according to the commands from the sink (the central node of the WSN, generate ultrasonic pulses. These pulses are received by the second set of (moving nodes, which estimate the pulse time trip and communicate it to the sink. Finally, the last set is constituted by general purpose nodes that collect any kind of data from the surrounding field. The sink gathers all the data, computes the position of moving nodes, and transfers information to external users on the Internet. The algorithms adopted to manage the network and to localize moving nodes are discussed. A working prototype based upon the hardware platform, software, and protocol described in this paper has been deployed and tested, and some results are shown. Simulation results of the localization system are presented to show system scalability.

  7. Performance Evaluation of ZnO based Rare Earth Element Doped Thin Films

    Directory of Open Access Journals (Sweden)

    Manish Sharma

    2013-10-01

    Full Text Available In DMS materials, a small fraction of a host semiconductor cation is substituted by magnetic ions. We chose as semiconducting host the transparent ZnO, with a bandgap of 3.3 eV at room temperature. Studies on ZnO doped with 3d transition metals indicated only small magnetic moments. The more recent results for Gd in GaN, indicating high magnetic moments, motivated us to investigate ZnO thin films doped with rare earth (RE metal ions. For the 3d transition metals, the 3d electrons are exterior and delocalized; leading to strong direct exchange interactions and high Curie temperatures, but often the orbital momentum is zero, leading to small total magnetic moments per atom. In RE metals, the 4f electrons are localized, exchange interactions are indirect, via 5d or 6s conduction electrons, but the high orbital momentum is leading to high total magnetic moments per atom, like 3.27μB for Nd. The Curie point for Nd is 19 K. In this paper we present the results of our study on ZnO films doped with Nd. Hall measurements are performed to investigate the electrical properties of films. Here we prepared and investigated ZnO films doped with different concentration of Nd. The films are grown on a-plane Al2O3 or SiO2 substrates. Hall investigations of electrical properties revealed the presence of a degenerate, highly conducting, film–substrate interface layer for the films grown on Al2O3; such an effect can be avoided, for example, by using SiO2 substrates. Magnetotransport measurements indicated no anomalous Hall effect, but a pronounced negative magneto resistance ratio that can be interpreted as a paramagnetic response of the system to the applied magnetic field. We would like to proceed with the surface sensitive techniques for investigating magnetic properties of ZnO:RE thin films.

  8. Performance evaluation and microstructure characterization of metakaolin-based geopolymer containing oil palm ash.

    Science.gov (United States)

    Hawa, Abideng; Tonnayopas, Danupon; Prachasaree, Woraphot

    2013-01-01

    This study reports on the microstructure, compressive strength, and drying shrinkage of metakaolin (MK) based geopolymers produced by partially replacing MK by oil palm ash (OPA). The OPA was used as raw material producing different molar ratios of SiO₂/Al₂O₃ and CaO/SiO₂. The geopolymer samples were cured at 80°C for 1, 2, or 4 hours and kept at ambient temperature until testing. The compressive strength was measured after 2, 6, and 24 hours and 7 and 28 days. The testing results revealed that the geopolymer with 5% OPA (SiO₂  : Al₂O₃ = 2.88 : 1) gave the highest compressive strength. Scanning electron microscopy (SEM) indicated that the 5% OPA sample had a dense-compact matrix and less unreacted raw materials which contributed to the higher compressive strength. In the X-ray diffraction (XRD) patterns, the change of the crystalline phase after heat curing for 4 hours was easily detectable compared to the samples subjected to a shorter period of heat curing.

  9. Performance Evaluation and Microstructure Characterization of Metakaolin-Based Geopolymer Containing Oil Palm Ash

    Directory of Open Access Journals (Sweden)

    Abideng Hawa

    2013-01-01

    Full Text Available This study reports on the microstructure, compressive strength, and drying shrinkage of metakaolin (MK based geopolymers produced by partially replacing MK by oil palm ash (OPA. The OPA was used as raw material producing different molar ratios of SiO2/Al2O3 and CaO/SiO2. The geopolymer samples were cured at 80°C for 1, 2, or 4 hours and kept at ambient temperature until testing. The compressive strength was measured after 2, 6, and 24 hours and 7 and 28 days. The testing results revealed that the geopolymer with 5% OPA (SiO2 : Al2O3 = 2.88 : 1 gave the highest compressive strength. Scanning electron microscopy (SEM indicated that the 5% OPA sample had a dense-compact matrix and less unreacted raw materials which contributed to the higher compressive strength. In the X-ray diffraction (XRD patterns, the change of the crystalline phase after heat curing for 4 hours was easily detectable compared to the samples subjected to a shorter period of heat curing.

  10. Performance evaluation of organic and titanium based working fluids for high-temperature heat pumps

    Energy Technology Data Exchange (ETDEWEB)

    Zamfirescu, C., E-mail: Calin.Zamfirescu@uoit.ca [Faculty of Engineering and Applied Science, University of Ontario Institute of Technology (UOIT), 2000 Simcoe Street North, Oshawa, ON, Canada L1H 74K (Canada); Dincer, I., E-mail: Ibrahim.Dincer@uoit.ca [Faculty of Engineering and Applied Science, University of Ontario Institute of Technology (UOIT), 2000 Simcoe Street North, Oshawa, ON, Canada L1H 74K (Canada); Naterer, G., E-mail: Greg.Naterer@uoit.ca [Faculty of Engineering and Applied Science, University of Ontario Institute of Technology (UOIT), 2000 Simcoe Street North, Oshawa, ON, Canada L1H 74K (Canada)

    2009-12-10

    In this paper, selected organic and titanium based fluids (biphenyl, biphenylmethane, naphthalene, isoquinoline, titanium tetrabromide and titanium tetraiodide) are assessed thermodynamically as potential working fluids for high temperature mechanical heat pumps. Various applications, such as thermo-chemical cycles for hydrogen production, chemical processes comprising endothermic reactions, steam generators and metallurgical processes, can benefit from such heat pumps as 'green' sources of high temperature heat. The environmental benefit occurs from avoiding fossil fuel heating and therefore reducing carbon dioxide and other pollutant emissions. Through heat pumps, a low-grade heat source from nuclear reactors, industrial waste, geothermal, etc. can be upgraded to high temperatures through a work-to-heat conversion. The work itself can originate from any source of renewable energy (wind, hydro, biomass, solar, etc.). In this paper, available thermo-physical parameters of the selected fluids are presented and appropriate equations of state are constructed to allow a heat pump thermodynamic analysis. Among these working fluids, only biphenyl, naphthalene, titanium tetrabromide and titanium tetraiodide have promising potential. For these fluids, a further parametric study is conducted to investigate the COP for a range of relevant operating conditions, in terms of temperature and pressure. The range of COP values is large, ranging from 1.9 to 7.3, depending on the fluid and temperature levels; the highest COP is obtained with TiI{sub 4}.

  11. Evaluation of the Performance of Financial Support for Agriculture in Guizhou Province Using Secondary Relative Benefit Model Based on DEA

    Institute of Scientific and Technical Information of China (English)

    2012-01-01

    We use the secondary relative benefit model based on DEA to evaluate the performance of agricultural financial expenditure in Guizhou Province, which can give due consideration to the production effectiveness determined by objective natural conditions, and management effectiveness of all regions (as decision-making body) in the use of financial fund for supporting agriculture. In general, there is north-south gradient difference in the performance of financial support for agriculture between regions in Guizhou Province. The drought in 2010 has significant impact on the technical efficiency in the whole province; the performance score of each item in Liupanshui City and Southwest Guizhou is very low; the technical efficiency and management efficiency in most regions need to be improved. In order to improve the performance of financial support for agriculture, we need to ensure the scale of input; at the same time, provide appropriate preferential financial policies for agricultural infrastructure, especially the construction of rural water conservancy, development and promotion of agricultural science and technology, and other fields; adopt the way of special check and acceptance of supporting projects to strengthen the use management of the fund for agriculture.

  12. Performance of human fecal anaerobe-associated PCR-based assays in a multi-laboratory method evaluation study

    Science.gov (United States)

    Layton, Blythe A.; Cao, Yiping; Ebentier, Darcy L.; Hanley, Kaitlyn; Ballesté, Elisenda; Brandão, João; Byappanahalli, Muruleedhara N.; Converse, Reagan; Farnleitner, Andreas H.; Gentry-Shields, Jennifer; Gourmelon, Michèle; Lee, Chang Soo; Lee, Jiyoung; Lozach, Solen; Madi, Tania; Meijer, Wim G.; Noble, Rachel; Peed, Lindsay; Reischer, Georg H.; Rodrigues, Raquel; Rose, Joan B.; Schriewer, Alexander; Sinigalliano, Chris; Srinivasan, Sangeetha; Stewart, Jill; ,; Laurie, C.; Wang, Dan; Whitman, Richard; Wuertz, Stefan; Jay, Jenny; Holden, Patricia A.; Boehm, Alexandria B.; Shanks, Orin; Griffith, John F.

    2013-01-01

    A number of PCR-based methods for detecting human fecal material in environmental waters have been developed over the past decade, but these methods have rarely received independent comparative testing in large multi-laboratory studies. Here, we evaluated ten of these methods (BacH, BacHum-UCD, Bacteroides thetaiotaomicron (BtH), BsteriF1, gyrB, HF183 endpoint, HF183 SYBR, HF183 Taqman®, HumM2, and Methanobrevibacter smithii nifH (Mnif)) using 64 blind samples prepared in one laboratory. The blind samples contained either one or two fecal sources from human, wastewater or non-human sources. The assay results were assessed for presence/absence of the human markers and also quantitatively while varying the following: 1) classification of samples that were detected but not quantifiable (DNQ) as positive or negative; 2) reference fecal sample concentration unit of measure (such as culturable indicator bacteria, wet mass, total DNA, etc); and 3) human fecal source type (stool, sewage or septage). Assay performance using presence/absence metrics was found to depend on the classification of DNQ samples. The assays that performed best quantitatively varied based on the fecal concentration unit of measure and laboratory protocol. All methods were consistently more sensitive to human stools compared to sewage or septage in both the presence/absence and quantitative analysis. Overall, HF183 Taqman® was found to be the most effective marker of human fecal contamination in this California-based study.

  13. SU-D-BRD-01: Cloud-Based Radiation Treatment Planning: Performance Evaluation of Dose Calculation and Plan Optimization

    Energy Technology Data Exchange (ETDEWEB)

    Na, Y; Kapp, D; Kim, Y; Xing, L [Stanford University School of Medicine, Stanford, CA (United States); Suh, T [Catholic UniversityMedical College, Seoul, Seoul (Korea, Republic of)

    2014-06-01

    Purpose: To report the first experience on the development of a cloud-based treatment planning system and investigate the performance improvement of dose calculation and treatment plan optimization of the cloud computing platform. Methods: A cloud computing-based radiation treatment planning system (cc-TPS) was developed for clinical treatment planning. Three de-identified clinical head and neck, lung, and prostate cases were used to evaluate the cloud computing platform. The de-identified clinical data were encrypted with 256-bit Advanced Encryption Standard (AES) algorithm. VMAT and IMRT plans were generated for the three de-identified clinical cases to determine the quality of the treatment plans and computational efficiency. All plans generated from the cc-TPS were compared to those obtained with the PC-based TPS (pc-TPS). The performance evaluation of the cc-TPS was quantified as the speedup factors for Monte Carlo (MC) dose calculations and large-scale plan optimizations, as well as the performance ratios (PRs) of the amount of performance improvement compared to the pc-TPS. Results: Speedup factors were improved up to 14.0-fold dependent on the clinical cases and plan types. The computation times for VMAT and IMRT plans with the cc-TPS were reduced by 91.1% and 89.4%, respectively, on average of the clinical cases compared to those with pc-TPS. The PRs were mostly better for VMAT plans (1.0 ≤ PRs ≤ 10.6 for the head and neck case, 1.2 ≤ PRs ≤ 13.3 for lung case, and 1.0 ≤ PRs ≤ 10.3 for prostate cancer cases) than for IMRT plans. The isodose curves of plans on both cc-TPS and pc-TPS were identical for each of the clinical cases. Conclusion: A cloud-based treatment planning has been setup and our results demonstrate the computation efficiency of treatment planning with the cc-TPS can be dramatically improved while maintaining the same plan quality to that obtained with the pc-TPS. This work was supported in part by the National Cancer Institute (1

  14. Study on Comprehensive Evaluation Model of Wind Farm Operation Performances Based on the Multi-Level Fuzzy Method

    Science.gov (United States)

    Zhao, Junyi; Huang, Yuanchao; Yang, Chaoying; Han, Yu

    In order to evaluate comprehensively and objectively the safety performance of the grid connected wind farms, a comprehensive evaluation index system is built, and multilayer fuzzy synthesis evaluation method is used to evaluate the grid connected wind farm operation safety. Firstly, a judgment matrix is built to determine the weight of each index, then, according to the fuzzy boundary tectonic membership description of each factor and factor fuzzy evaluation matrix, finally, through the composite operation of multi-layer evaluation object belongs to grade fuzzy behavior index and membership function, implementation of the system, on the performance of grid connected wind farm, a comprehensive evaluation of the quantitative and the relative ranking of wind farm. In the example analysis, the comprehensive evaluation of three typical wind farm to verify the effectiveness and feasibility of the method.

  15. Evaluation of the team performance observation tool with targeted behavioral markers in simulation-based interprofessional education.

    Science.gov (United States)

    Zhang, Chao; Miller, Connie; Volkman, Kathleen; Meza, Jane; Jones, Katherine

    2015-05-01

    The primary aim of this study was to decrease the subjectivity of the Team Performance Observation Tool (TPOT) and determine the psychometric properties of this tool when using scenario-specific targeted behavioral markers (TBMs). We used a convenience sample of 47 physical therapy and 25 nursing students at an academic medical center who were organized in interprofessional teams of three to care for a simulated patient. The TPOT demonstrated satisfactory validity and reliability with the use of TBMs. We demonstrated significant correlations between the TPOT overall rating and two scenario-specific outcomes: (1) a negative correlation between the TPOT overall rating and the number of medical errors committed by the 24 teams (r = -0.531, p = 0.008) and (2) a positive correlation between the TPOT overall rating and a time-based functional outcome (r = 0.803, p < 0.001). We demonstrated substantial test-retest reliability (kappa = 0.707, p < 0.001), inter-rater reliability (kappa = 0.730), and good internal consistency reliability (Cronbach's α = 0.921). The results of our study support the use of scenario-specific TBMs to enhance the reliability and validity of the TPOT for use in the evaluation of team-based simulation scenarios. Further evaluation of the TPOT with TBMs from other simulation and training contexts is warranted. PMID:25421454

  16. Performance Evaluation of Constrained Portfolios

    NARCIS (Netherlands)

    I. Pouchkarev (Igor)

    2005-01-01

    textabstractConventional performance evaluation methods strongly differentiate between the universe which is used for portfolio construction, and the universe which is used for the performance evaluation. Whilst by composing the portfolio we consider the complete opportunity set, in the last case we

  17. Evaluation of a novel chitosan-based flocculant with high flocculation performance, low toxicity and good floc properties.

    Science.gov (United States)

    Yang, Zhen; Li, Haijiang; Yan, Han; Wu, Hu; Yang, Hu; Wu, Qian; Li, Haibo; Li, Aimin; Cheng, Rongshi

    2014-07-15

    In this work, a novel chitosan-based flocculant, carboxymethyl chitosan-graft-poly[(2-methacryloyloxyethyl) trimethyl ammonium chloride] (CMC-g-PDMC), was designed and prepared successfully. Flocculation performance of CMC-g-PDMC was systematically evaluated using kaolin suspension, humic acid (HA) solution and kaolin-HA mixed suspension as synthetic wastewater under acidic, neutral and alkaline conditions, respectively. The experimental results demonstrated that CMC-g-PDMC exhibited lower optimal dosage, higher contaminant removal efficiency, wider applicable pH range, lower effluent toxicity and better floc properties for handling and disposal, in comparison with polyaluminum chloride. The high flocculation performance of CMC-g-PDMC was ascribed to two structural advantages of improved both positive charges and molecular weight. In addition, flocs characteristics including flocs formation, breakage, regrowth and fractal structure, were studied by an in-situ light scattering system during the flocculation process. Detailed analysis clearly illuminated the differences and relationship among floc size, fractal dimension and floc strength. Based on analysis of floc properties in combination with zeta potential measurements, flocculation mechanisms in different synthetic wastewater at various pHs were deeply discussed: charge neutralization or patching played the key role under different conditions, and the relationship between flocculation mechanisms and floc properties has been built. The effective and environment-friendly flocculant bear significant application potentials in water treatment fields. PMID:24929787

  18. In vitro -in vivo performance evaluation of treated Plantago ovata husk based fast dissolving tablets of glipizide: Flashtab technology

    Directory of Open Access Journals (Sweden)

    Antesh Kumar Jha

    2014-01-01

    Full Text Available Physicians suggest premeal administration of glipizide (30 min before a meal because of longer disintegration time (approximately 15 min of conventional tablet. Hence, the dosage form was developed, called as fast dissolving tablet (FDT, which disintegrates rapidly within a minute. FDTs by Flashtab technology is based on a swellable agent and a superdisintegrant. In the current study, treated Plantago ovata husk (TPOH, and microcrystalline cellulose were utilized as natural superdisintegrant and swellable agent, respectively. FDT formulations were prepared by direct compression and evaluated for in vitro tablet performance, such as disintegration time, wetting time, hardness, friability, swelling and percent drug release. On the basis of finding, formulation with 15% TPOH concentration (TPOH 7 was selected as optimized formulation. To evaluate the in vitro performance, the formulation TPOH 7 and the marketed tablets (glynase were administered to rabbits. In the case of marketed tablet, the peak plasma-concentration of glipizide was obtained in 2.83 h of administration whereas it was 2 h for TPOH 7 indicating immediate absorption and therefore faster onset of action of the prepared FDT formulation than the marketed one. Drug interaction studies, performed by using FTIR spectroscopy, X-ray diffractometry and differential scanning calorimetric methods, indicate that the glipizide is compatible with the formulation components. The accelerated stability study (40°C ± 2°C/75% ±5% relative humidity for the optimized formulation showed a negligible change over time for the in vitro parameters. The results suggest that TPOH has promising potential for faster disintegration and fulfills the requirement of FDTs.

  19. Performance Evaluation of Alternative Relative Orientation Procedures for UAV-based Imagery with Prior Flight Trajectory Information

    Directory of Open Access Journals (Sweden)

    F. He

    2016-06-01

    Full Text Available Thanks to recent advances at the hardware (e.g., emergence of reliable platforms at low cost and software (e.g., automated identification of conjugate points in overlapping images levels, UAV-based 3D reconstruction has been widely used in various applications. However, mitigating the impact of outliers in automatically matched points in UAV imagery, especially when dealing with scenes that has poor and/or repetitive texture, remains to be a challenging task. In spite of the fact that existing literature has already demonstrated that incorporating prior motion information can play an important role in increasing the reliability of the matching process, there is a lack of methodologies that are mainly suited for UAV imagery. Assuming the availability of prior information regarding the trajectory of a UAV-platform, this paper presents a two-point approach for reliable estimation of Relative Orientation Parameters (ROPs of UAV-based images. This approach is based on the assumption that the UAV platform is moving at a constant flying height while maintaining the camera in a nadir-looking orientation. For this flight scenario, a closed-form solution that can be derived using a minimum of two pairs of conjugate points is established. In order to evaluate the performance of the proposed approach, experimental tests using real stereo-pairs acquired from different UAV platforms have been conducted. The derived results from the comparative performance analysis against the Nistér five-point approach demonstrate that the proposed two-point approach is capable of providing reliable estimate of the ROPs from UAV-based imagery in the presence of poor and/or repetitive texture with high percentage of matching outliers.

  20. Performance Evaluation of Alternative Relative Orientation Procedures for UAV-based Imagery with Prior Flight Trajectory Information

    Science.gov (United States)

    He, F.; Habib, A.

    2016-06-01

    Thanks to recent advances at the hardware (e.g., emergence of reliable platforms at low cost) and software (e.g., automated identification of conjugate points in overlapping images) levels, UAV-based 3D reconstruction has been widely used in various applications. However, mitigating the impact of outliers in automatically matched points in UAV imagery, especially when dealing with scenes that has poor and/or repetitive texture, remains to be a challenging task. In spite of the fact that existing literature has already demonstrated that incorporating prior motion information can play an important role in increasing the reliability of the matching process, there is a lack of methodologies that are mainly suited for UAV imagery. Assuming the availability of prior information regarding the trajectory of a UAV-platform, this paper presents a two-point approach for reliable estimation of Relative Orientation Parameters (ROPs) of UAV-based images. This approach is based on the assumption that the UAV platform is moving at a constant flying height while maintaining the camera in a nadir-looking orientation. For this flight scenario, a closed-form solution that can be derived using a minimum of two pairs of conjugate points is established. In order to evaluate the performance of the proposed approach, experimental tests using real stereo-pairs acquired from different UAV platforms have been conducted. The derived results from the comparative performance analysis against the Nistér five-point approach demonstrate that the proposed two-point approach is capable of providing reliable estimate of the ROPs from UAV-based imagery in the presence of poor and/or repetitive texture with high percentage of matching outliers.

  1. Dry Process Fuel Performance Evaluation

    Energy Technology Data Exchange (ETDEWEB)

    Yang, Myung Seung; Song, K. C.; Moon, J. S. and others

    2005-04-15

    The objective of the project is to establish the performance evaluation system of DUPIC fuel during the Phase II R and D. In order to fulfil this objectives, irradiation test of DUPIC fuel was carried out in HANARO using the non-instrumented and SPND-instrumented rig. Also, the analysis on the in-reactor behavior analysis of DUPIC fuel, out-pile test using simulated DUPIC fuel as well as performance and integrity assessment in a commercial reactor were performed during this Phase. The R and D results of the Phase II are summarized as follows : - Performance evaluation of DUPIC fuel via irradiation test in HANARO - Post irradiation examination of irradiated fuel and performance analysis - Development of DUPIC fuel performance code (modified ELESTRES) considering material properties of DUPIC fuel - Irradiation behavior and integrity assessment under the design power envelope of DUPIC fuel - Foundamental technology development of thermal/mechanical performance evaluation using ANSYS (FEM package)

  2. Measuring quality of occupational performance based on self-report and observation : development and validation of instruments to evaluate ADL task performance

    OpenAIRE

    Waehrens, Eva Ejlersen

    2010-01-01

    Background People with rheumatic or neurologic conditions are commonly referred for occupational therapy because of decreased ability to perform ADL tasks. Upon referral, occupational therapists use a client-centred, occupationfocused approach when evaluating a person's perceived and observed quality of ADL task performance to clarify the nature and extent of the person’s problems, plan interventions and determine effectiveness of interventions. Evaluation of the extent of problems and change...

  3. Room for Improvement: Performance Evaluations.

    Science.gov (United States)

    Webb, Gisela

    1989-01-01

    Describes a performance management approach to library personnel management that stresses communication, clarification of goals, and reinforcement of new practices and behaviors. Each phase of the evaluation process (preparation, rating, administrative review, appraisal interview, and follow-up) and special evaluations to be used in cases of…

  4. Evaluation of the performance of a castor-oil based formulation in limiting pesticide residues in strawberry crops

    OpenAIRE

    Mário Sérgio Galhiane; Sandra Regina Rissato; Lucídio de Sousa Santos; Gilberto Orivaldo Chierice; Marcos Vinícius de Almeida; Terezinha Fumis; Inês Chechim; Aloísio Costa Sampaio

    2012-01-01

    A study was made to evaluate the effect of a castor oil-based detergent on strawberry crops treated with different classes of pesticides, namely deltamethrin, folpet, tebuconazole, abamectin and mancozeb, in a controlled environment. Experimental crops of greenhouse strawberries were cultivated in five different ways with control groups using pesticides and castor oil-based detergent. The results showed that the group 2, which was treated with castor oil-based detergent, presented the lowest ...

  5. A PERFORMANCE EVALUATION INDEX SYSTEM FOR MULTIMEDIA COMMUNICATION NETWORKS AND FORECASTING FOR WEB-BASED NETWORK TRAFFIC

    Institute of Scientific and Technical Information of China (English)

    Wuyi YUE; Jifa GU; Xijin TANG

    2004-01-01

    This paper presents a new index system for the performance evaluation and network planning of multimedia communication systems using measurement on actual systems to support several different traffic types. In this index system, we develop an expert system to evaluate the performance of such multimedia communication networks including channel utilization and call blocking probability andpacket delay, and apply the network planning methods to optimize the networks and forecast thedemand of the growing multimedia communications systems. Two important planning problems for the multimedia communication systems are presented: optimization problem for construction of the world system and forecast problem for increasing traffic demands. We first discuss analysis methods,performance measures for the multimedia communication systems. Then, we describe network planning methods for the multimedia communication systems and give some efficiency network planning methods. Finally, we present some results studied in traffic forecast for the campus network and show the effectiveness of these methods.

  6. Evaluating the performance of two neutron spectrum unfolding codes based on iterative procedures and artificial neural networks

    Energy Technology Data Exchange (ETDEWEB)

    Ortiz-Rodriguez, J. M.; Reyes Alfaro, A.; Reyes Haro, A.; Solis Sanches, L. O.; Miranda, R. Castaneda; Cervantes Viramontes, J. M. [Universidad Autonoma de Zacatecas, Unidad Academica de Ingenieria Electrica. Av. Ramon Lopez Velarde 801. Col. Centro Zacatecas, Zac (Mexico); Vega-Carrillo, H. R. [Universidad Autonoma de Zacatecas, Unidad Academica de Ingenieria Electrica. Av. Ramon Lopez Velarde 801. Col. Centro Zacatecas, Zac., Mexico. and Unidad Academica de Estudios Nucleares. C. Cip (Mexico)

    2013-07-03

    In this work the performance of two neutron spectrum unfolding codes based on iterative procedures and artificial neural networks is evaluated. The first one code based on traditional iterative procedures and called Neutron spectrometry and dosimetry from the Universidad Autonoma de Zacatecas (NSDUAZ) use the SPUNIT iterative algorithm and was designed to unfold neutron spectrum and calculate 15 dosimetric quantities and 7 IAEA survey meters. The main feature of this code is the automated selection of the initial guess spectrum trough a compendium of neutron spectrum compiled by the IAEA. The second one code known as Neutron spectrometry and dosimetry with artificial neural networks (NDSann) is a code designed using neural nets technology. The artificial intelligence approach of neural net does not solve mathematical equations. By using the knowledge stored at synaptic weights on a neural net properly trained, the code is capable to unfold neutron spectrum and to simultaneously calculate 15 dosimetric quantities, needing as entrance data, only the rate counts measured with a Bonner spheres system. Similarities of both NSDUAZ and NSDann codes are: they follow the same easy and intuitive user's philosophy and were designed in a graphical interface under the LabVIEW programming environment. Both codes unfold the neutron spectrum expressed in 60 energy bins, calculate 15 dosimetric quantities and generate a full report in HTML format. Differences of these codes are: NSDUAZ code was designed using classical iterative approaches and needs an initial guess spectrum in order to initiate the iterative procedure. In NSDUAZ, a programming routine was designed to calculate 7 IAEA instrument survey meters using the fluence-dose conversion coefficients. NSDann code use artificial neural networks for solving the ill-conditioned equation system of neutron spectrometry problem through synaptic weights of a properly trained neural network. Contrary to iterative procedures, in

  7. Evaluating the performance of two neutron spectrum unfolding codes based on iterative procedures and artificial neural networks

    International Nuclear Information System (INIS)

    In this work the performance of two neutron spectrum unfolding codes based on iterative procedures and artificial neural networks is evaluated. The first one code based on traditional iterative procedures and called Neutron spectrometry and dosimetry from the Universidad Autonoma de Zacatecas (NSDUAZ) use the SPUNIT iterative algorithm and was designed to unfold neutron spectrum and calculate 15 dosimetric quantities and 7 IAEA survey meters. The main feature of this code is the automated selection of the initial guess spectrum trough a compendium of neutron spectrum compiled by the IAEA. The second one code known as Neutron spectrometry and dosimetry with artificial neural networks (NDSann) is a code designed using neural nets technology. The artificial intelligence approach of neural net does not solve mathematical equations. By using the knowledge stored at synaptic weights on a neural net properly trained, the code is capable to unfold neutron spectrum and to simultaneously calculate 15 dosimetric quantities, needing as entrance data, only the rate counts measured with a Bonner spheres system. Similarities of both NSDUAZ and NSDann codes are: they follow the same easy and intuitive user's philosophy and were designed in a graphical interface under the LabVIEW programming environment. Both codes unfold the neutron spectrum expressed in 60 energy bins, calculate 15 dosimetric quantities and generate a full report in HTML format. Differences of these codes are: NSDUAZ code was designed using classical iterative approaches and needs an initial guess spectrum in order to initiate the iterative procedure. In NSDUAZ, a programming routine was designed to calculate 7 IAEA instrument survey meters using the fluence-dose conversion coefficients. NSDann code use artificial neural networks for solving the ill-conditioned equation system of neutron spectrometry problem through synaptic weights of a properly trained neural network. Contrary to iterative procedures, in neural

  8. Evaluating the performance of two neutron spectrum unfolding codes based on iterative procedures and artificial neural networks

    Science.gov (United States)

    Ortiz-Rodríguez, J. M.; Reyes Alfaro, A.; Reyes Haro, A.; Solís Sánches, L. O.; Miranda, R. Castañeda; Cervantes Viramontes, J. M.; Vega-Carrillo, H. R.

    2013-07-01

    In this work the performance of two neutron spectrum unfolding codes based on iterative procedures and artificial neural networks is evaluated. The first one code based on traditional iterative procedures and called Neutron spectrometry and dosimetry from the Universidad Autonoma de Zacatecas (NSDUAZ) use the SPUNIT iterative algorithm and was designed to unfold neutron spectrum and calculate 15 dosimetric quantities and 7 IAEA survey meters. The main feature of this code is the automated selection of the initial guess spectrum trough a compendium of neutron spectrum compiled by the IAEA. The second one code known as Neutron spectrometry and dosimetry with artificial neural networks (NDSann) is a code designed using neural nets technology. The artificial intelligence approach of neural net does not solve mathematical equations. By using the knowledge stored at synaptic weights on a neural net properly trained, the code is capable to unfold neutron spectrum and to simultaneously calculate 15 dosimetric quantities, needing as entrance data, only the rate counts measured with a Bonner spheres system. Similarities of both NSDUAZ and NSDann codes are: they follow the same easy and intuitive user's philosophy and were designed in a graphical interface under the LabVIEW programming environment. Both codes unfold the neutron spectrum expressed in 60 energy bins, calculate 15 dosimetric quantities and generate a full report in HTML format. Differences of these codes are: NSDUAZ code was designed using classical iterative approaches and needs an initial guess spectrum in order to initiate the iterative procedure. In NSDUAZ, a programming routine was designed to calculate 7 IAEA instrument survey meters using the fluence-dose conversion coefficients. NSDann code use artificial neural networks for solving the ill-conditioned equation system of neutron spectrometry problem through synaptic weights of a properly trained neural network. Contrary to iterative procedures, in neural

  9. Evaluating the performance of different predictor strategies in regression-based downscaling with a focus on glacierized mountain environments

    Science.gov (United States)

    Hofer, Marlis; Nemec, Johanna

    2016-04-01

    This study presents first steps towards verifying the hypothesis that uncertainty in global and regional glacier mass simulations can be reduced considerably by reducing the uncertainty in the high-resolution atmospheric input data. To this aim, we systematically explore the potential of different predictor strategies for improving the performance of regression-based downscaling approaches. The investigated local-scale target variables are precipitation, air temperature, wind speed, relative humidity and global radiation, all at a daily time scale. Observations of these target variables are assessed from three sites in geo-environmentally and climatologically very distinct settings, all within highly complex topography and in the close proximity to mountain glaciers: (1) the Vernagtbach station in the Northern European Alps (VERNAGT), (2) the Artesonraju measuring site in the tropical South American Andes (ARTESON), and (3) the Brewster measuring site in the Southern Alps of New Zealand (BREWSTER). As the large-scale predictors, ERA interim reanalysis data are used. In the applied downscaling model training and evaluation procedures, particular emphasis is put on appropriately accounting for the pitfalls of limited and/or patchy observation records that are usually the only (if at all) available data from the glacierized mountain sites. Generalized linear models and beta regression are investigated as alternatives to ordinary least squares regression for the non-Gaussian target variables. By analyzing results for the three different sites, five predictands and for different times of the year, we look for systematic improvements in the downscaling models' skill specifically obtained by (i) using predictor data at the optimum scale rather than the minimum scale of the reanalysis data, (ii) identifying the optimum predictor allocation in the vertical, and (iii) considering multiple (variable, level and/or grid point) predictor options combined with state

  10. Performance evaluation of Central European companies

    Directory of Open Access Journals (Sweden)

    Petr Fiala

    2015-10-01

    Full Text Available The paper presents a modelling approach for performance comparison of Central European companies on three levels: country, industry, and company. The approach is based on Data Envelopment Analysis and Analytic Hierarchy Process. The proposed model consists of two basic sections. The first section estimates the importance of selected industries in the countries, whereas the second section evaluates the performance of companies within industries. The results of both sections are synthesized and finally the country performance is estimated. The evaluation is based on the data set resulting from a survey of companies from selected industries.

  11. The Performance Evaluation of AODV-based and DSR-based Multi-radio Routing Protocols in Cognitive Radio Ad Hoc Network

    Directory of Open Access Journals (Sweden)

    Zamree Che-aron

    2013-07-01

    Full Text Available Due to the huge advancement of wireless technologies, the radio spectrum is one of the most heavily used and costly natural resources. Cognitive Radio (CR is a promising technology to solve the problem of radio spectrum shortage and spectrum underutilization by enabling unlicensed users to opportunistically access the available licensed bands in an intelligent and cautious manner. In Cognitive Radio Ad Hoc Networks (CRAHNs, which operate without centralized administration, the data routing is one of the most important issues to be taken into account and requires more study. In this study, we analyze and evaluate the performance of AODV-based and DSR-based multi-radio routing protocols (AODV-MR, extended DSR and MR-LQSR in CRAHN using simulations in NS-2. The metrics used for performance analysis are average throughput, average end-to-end delay and average jitter. From the simulation results, it is observed that the MR-LQSR protocol provides better performance in term of average throughput and gives smallest number of dropped packets. Whereas the extended DSR gives better results of average end-to-end delay and average jitter.

  12. A State of the Art Review- Methods to Evaluate Electrical Performance of Composite Cross-arms and Composite-based Pylons

    DEFF Research Database (Denmark)

    Wang, Qian; Bak, Claus Leth; Silva, Filipe Miguel Faria da;

    2016-01-01

    A novel uni-body composite pylon has been proposed for 400 kV transmission lines with advantages of compacted size, friendly looking and cost competitiveness. As its configuration is quite different from the traditional lattice pylon, its electrical performance needs in-depth investigation...... and evaluation, for which electrical testing methods are essential. However, as research on composite-based pylons is still in initial stage, leaving international standards and theoretical analysis on this topic very limited, effective testing methods to evaluate the fully composite pylon’s electrical...... performance need to be studied. This paper sums up experience and key advances on testing methods to evaluate electrical performance of composite cross-arms and composite-based pylons. Based on state of the art review, several feasible testing methods that can be used to verify the feasibility of the novel...

  13. A flat-panel detector based micro-CT system: performance evaluation for small-animal imaging.

    Science.gov (United States)

    Lee, Sang Chul; Kim, Ho Kyung; Chun, In Kon; Cho, Myung Hye; Lee, Soo Yeol; Cho, Min Hyoung

    2003-12-21

    A dedicated small-animal x-ray micro computed tomography (micro-CT) system has been developed to screen laboratory small animals such as mice and rats. The micro-CT system consists of an indirect-detection flat-panel x-ray detector with a field-of-view of 120 x 120 mm2, a microfocus x-ray source, a rotational subject holder and a parallel data processing system. The flat-panel detector is based on a matrix-addressed photodiode array fabricated by a CMOS (complementary metal-oxide semiconductor) process coupled to a CsI:T1 (thallium-doped caesium iodide) scintillator as an x-ray-to-light converter. Principal imaging performances of the micro-CT system have been evaluated in terms of image uniformity, voxel noise and spatial resolution. It has been found that the image non-uniformity mainly comes from the structural non-uniform sensitivity pattern of the flat-panel detector and the voxel noise is about 48 CT numbers at the voxel size of 100 x 100 x 200 microm3 and the air kerma of 286 mGy. When the magnification ratio is 2, the spatial resolution of the micro-CT system is about 14 1p/mm (line pairs per millimetre) that is almost determined by the flat-panel detector showing about 7 1p/mm resolving power. Through low-contrast phantom imaging studies, the minimum resolvable contrast has been found to be less than 36 CT numbers at the air kerma of 95 mGy. Some laboratory rat imaging results are presented. PMID:14727760

  14. Evaluating an undergraduate interprofessional simulation-based educational module: communication, teamwork, and confidence performing cardiac resuscitation skills

    Directory of Open Access Journals (Sweden)

    Marian Luctkar-Flude

    2010-11-01

    Full Text Available Marian Luctkar-Flude1, Cynthia Baker1, Cheryl Pulling1, Robert McGraw2, Damon Dagnone2, Jennifer Medves1, Carly Turner-Kelly11School of Nursing, Queen’s University, Kingston, Ontario, Canada; 2School of Medicine, Queen’s University, Kingston, Ontario, CanadaPurpose: Interprofessional (IP collaboration during cardiac resuscitation is essential and contributes to patient wellbeing. The purpose of this study is to evaluate an innovative simulation-based IP educational module for undergraduate nursing and medical students on cardiac resuscitation skills.Methods: Nursing and medical trainees participated in a new cardiac resuscitation curriculum involving a 2-hour IP foundational cardiac resuscitation skills lab, followed by three 2-hour IP simulation sessions. Control group participants attended the existing two 2-hour IP simulation sessions. Study respondents (N = 71 completed a survey regarding their confidence performing cardiac resuscitation skills and their perceptions of IP collaboration.Results: Despite a consistent positive trend, only one out of 17 quantitative survey items were significantly improved for learners in the new curriculum. They were more likely to report feeling confident managing the airway during cardiac resuscitation (P = 0.001. Overall, quantitative results suggest that senior nursing and medical students were comfortable with IP communication and teamwork and confident with cardiac resuscitation skills. There were no significant differences between nursing students’ and medical students’ results. Through qualitative feedback, participants reported feeling comfortable learning with students from other professions and found value in the IP simulation sessions.Conclusion: Results from this study will inform ongoing restructuring of the IP cardiac resuscitation skills simulation module as defined by the action research process. Specific improvements that are suggested by these findings include strengthening the team

  15. Evaluating model performance of an ensemble-based chemical data assimilation system during INTEX-B field mission

    Directory of Open Access Journals (Sweden)

    A. F. Arellano Jr.

    2007-11-01

    Full Text Available We present a global chemical data assimilation system using a global atmosphere model, the Community Atmosphere Model (CAM3 with simplified chemistry and the Data Assimilation Research Testbed (DART assimilation package. DART is a community software facility for assimilation studies using the ensemble Kalman filter approach. Here, we apply the assimilation system to constrain global tropospheric carbon monoxide (CO by assimilating meteorological observations of temperature and horizontal wind velocity and satellite CO retrievals from the Measurement of Pollution in the Troposphere (MOPITT satellite instrument. We verify the system performance using independent CO observations taken on board the NSF/NCAR C-130 and NASA DC-8 aircrafts during the April 2006 part of the Intercontinental Chemical Transport Experiment (INTEX-B. Our evaluations show that MOPITT data assimilation provides significant improvements in terms of capturing the observed CO variability relative to no MOPITT assimilation (i.e. the correlation improves from 0.62 to 0.71, significant at 99% confidence. The assimilation provides evidence of median CO loading of about 150 ppbv at 700 hPa over the NE Pacific during April 2006. This is marginally higher than the modeled CO with no MOPITT assimilation (~140 ppbv. Our ensemble-based estimates of model uncertainty also show model overprediction over the source region (i.e. China and underprediction over the NE Pacific, suggesting model errors that cannot be readily explained by emissions alone. These results have important implications for improving regional chemical forecasts and for inverse modeling of CO sources and further demonstrate the utility of the assimilation system in comparing non-coincident measurements, e.g. comparing satellite retrievals of CO with in-situ aircraft measurements.

  16. Catching up with the Vaughn express: Six years of standards-based teacher evaluation and performance pay.

    Directory of Open Access Journals (Sweden)

    Eileen M. Kellor

    2005-01-01

    Full Text Available Traditional methods of paying and evaluating teachers in the United States are longstanding, but discussions about changing these systems to support teacher quality and student achievement goals are becoming more common. Efforts to make significant changes to these programs can be difficult and take many years to design, gain approval, and implement; thus, few examples of alternative teacher compensation and evaluation systems exist. Relieved from many of the restrictions and requirements associated with most traditional public school systems, charter schools often are better positioned to implement changes more quickly than a traditional school, yet their experiences can provide useful information for others who are engaging in similar activities. Thus, the experience of a large urban charter school that designed and implemented an innovative teacher compensation system and standards-based teacher evaluation system that has been in place for six years offers important lessons in designing, implementing, evaluating and refining these systems.

  17. Performance Evaluation of Security Protocols

    DEFF Research Database (Denmark)

    Bodei, Chiara; Buchholtz, Mikael; Curti, Michele;

    2005-01-01

    We use a special operational semantics which drives us in inferring quantitative measures on systems describing cryptographis cryptographic protocols. We assign rates to transitions by only looking at these labels. The rates reflect the distributed architecture running applications and the use of...... of possibly different cryptosystems. We then map transition systems to Markov chains and evaluate performance of systems, using standard tools....

  18. Performance evaluation of ant colony optimization-based solution strategies on the mixed-model assembly line balancing problem

    Science.gov (United States)

    Akpinar, Sener; Mirac Bayhan, G.

    2014-06-01

    The aim of this article is to compare the performances of iterative ant colony optimization (ACO)-based solution strategies on a mixed-model assembly line balancing problem of type II (MMALBP-II) by addressing some particular features of real-world assembly line balancing problems such as parallel workstations and zoning constraints. To solve the problem, where the objective is to minimize the cycle time (i.e. maximize the production rate) for a predefined number of workstations in an existing assembly line, two ACO-based approaches which differ in the mission assigned to artificial ants are used. Furthermore, each ACO-based approach is conducted with two different pheromone release strategies: global and local pheromone updating rules. The four ACO-based approaches are used for solving 20 representative MMALBP-II to compare their performance in terms of computational time and solution quality. Detailed comparison results are presented.

  19. A State-Based Modeling Approach for Efficient Performance Evaluation of Embedded System Architectures at Transaction Level

    Directory of Open Access Journals (Sweden)

    Anthony Barreteau

    2012-01-01

    Full Text Available Abstract models are necessary to assist system architects in the evaluation process of hardware/software architectures and to cope with the still increasing complexity of embedded systems. Efficient methods are required to create reliable models of system architectures and to allow early performance evaluation and fast exploration of the design space. In this paper, we present a specific transaction level modeling approach for performance evaluation of hardware/software architectures. This approach relies on a generic execution model that exhibits light modeling effort. Created models are used to evaluate by simulation expected processing and memory resources according to various architectures. The proposed execution model relies on a specific computation method defined to improve the simulation speed of transaction level models. The benefits of the proposed approach are highlighted through two case studies. The first case study is a didactic example illustrating the modeling approach. In this example, a simulation speed-up by a factor of 7,62 is achieved by using the proposed computation method. The second case study concerns the analysis of a communication receiver supporting part of the physical layer of the LTE protocol. In this case study, architecture exploration is led in order to improve the allocation of processing functions.

  20. Based on Grey Fuzzy Evaluation of Water Conservancy Project Management Performance Evaluation%基于灰色模糊评价的水利工程管理绩效评价

    Institute of Scientific and Technical Information of China (English)

    陈茜

    2015-01-01

    This paper introduces the performance evaluation based on grey fuzzy evaluation of water conservancy project management research significance,based on grey fuzzy evaluation of the performance evaluation of water conservancy project management research present situation,and improve the grey fuzzy evaluation of water conservancy project management performance evaluation of research that the strategy has carried on the deep discussion and analysis.%文中简单介绍了基于灰色模糊评价的水利工程管理绩效评价研究意义,针对基于灰色模糊评价的水利工程管理绩效评价研究现状,以及提高灰色模糊评价的水利工程管理绩效评价研究效果策略进行了深入的探讨和分析。

  1. A State of the Art Review- Methods to Evaluate Electrical Performance of Composite Cross-arms and Composite-based Pylons

    DEFF Research Database (Denmark)

    Wang, Qian; Bak, Claus Leth; Silva, Filipe Miguel Faria da;

    2016-01-01

    performance need to be studied. This paper sums up experience and key advances on testing methods to evaluate electrical performance of composite cross-arms and composite-based pylons. Based on state of the art review, several feasible testing methods that can be used to verify the feasibility of the novel......A novel uni-body composite pylon has been proposed for 400 kV transmission lines with advantages of compacted size, friendly looking and cost competitiveness. As its configuration is quite different from the traditional lattice pylon, its electrical performance needs in-depth investigation...

  2. MCDA-C Methodology Based Performance Evaluation of Small and Medium-Sized Businesses at the City of Lages

    Directory of Open Access Journals (Sweden)

    Marcelo Nascimento

    2013-12-01

    Full Text Available When employed in a focused manner, corporate performance evaluation has proven to be instrumental for entrepreneurs as an important tool that contributes with performance improvements at their organizations. The descriptive study herein, prepared as of a questionnaire comprising 46 queries, poses to analyse the performance of micro and small companies (MSEs by employing the multicriteria methodology for constructive decision aiding (MCDA-C. As of respondent replies, MCDA-C descriptors were formed, shaping six prime groups so as to identify relevant factors that drive or hinder MSE success. The questionnaire was applied to managers in charge administering 25 small and medium-sized companies of Lages, a city within the Brazilian state of Santa Catarina. Study findings provide evidence as to the fact that (i 24% of surveyed companies, tend to go bankrupt; (ii managerial functions at the MSEs are the prime source of influence on negative outcomes; (iii from a financial control standpoint, surveyed companies fall far shorter than the minimum level deemed necessary to qualify as satisfactory; (iv those that present the best results, operate both within the domestic and international markets; (v the study placed under the spotlight the group “Evolution Stage”, evidencing the trend of ever increasing MSE expansion. This study revealed that corporate failure contributing factors are intensely interconnected and largely depend on the entrepreneur´s own performance, the prime contribution of findings residing in demonstrating that MCDA-C can be employed to analyse the performance of micro and small businesses.

  3. Improvement of Automotive Part Supplier Performance Evaluation

    Science.gov (United States)

    Kongmunee, Chalermkwan; Chutima, Parames

    2016-05-01

    This research investigates the problem of the part supplier performance evaluation in a major Japanese automotive plant in Thailand. Its current evaluation scheme is based on experiences and self-opinion of the evaluators. As a result, many poor performance suppliers are still considered as good suppliers and allow to supply parts to the plant without further improvement obligation. To alleviate this problem, the brainstorming session among stakeholders and evaluators are formally conducted. The result of which is the appropriate evaluation criteria and sub-criteria. The analytical hierarchy process is also used to find suitable weights for each criteria and sub-criteria. The results show that a newly developed evaluation method is significantly better than the previous one in segregating between good and poor suppliers.

  4. Evaluating Model Performance of an Ensemble-based Chemical Data Assimilation System During INTEX-B Field Mission

    Science.gov (United States)

    Arellano, A. F., Jr.; Raeder, K.; Anderson, J. L.; Hess, P. G.; Emmons, L. K.; Edwards, D. P.; Pfister, G. G.; Campos, T. L.; Sachse, G. W.

    2007-01-01

    We present a global chemical data assimilation system using a global atmosphere model, the Community Atmosphere Model (CAM3) with simplified chemistry and the Data Assimilation Research Testbed (DART) assimilation package. DART is a community software facility for assimilation studies using the ensemble Kalman filter approach. Here, we apply the assimilation system to constrain global tropospheric carbon monoxide (CO) by assimilating meteorological observations of temperature and horizontal wind velocity and satellite CO retrievals from the Measurement of Pollution in the Troposphere (MOPITT) satellite instrument. We verify the system performance using independent CO observations taken on board the NSFINCAR C-130 and NASA DC-8 aircrafts during the April 2006 part of the Intercontinental Chemical Transport Experiment (INTEX-B). Our evaluations show that MOPITT data assimilation provides significant improvements in terms of capturing the observed CO variability relative to no MOPITT assimilation (i.e. the correlation improves from 0.62 to 0.71, significant at 99% confidence). The assimilation provides evidence of median CO loading of about 150 ppbv at 700 hPa over the NE Pacific during April 2006. This is marginally higher than the modeled CO with no MOPITT assimilation (-140 ppbv). Our ensemble-based estimates of model uncertainty also show model overprediction over the source region (i.e. China) and underprediction over the NE Pacific, suggesting model errors that cannot be readily explained by emissions alone. These results have important implications for improving regional chemical forecasts and for inverse modeling of CO sources and further demonstrate the utility of the assimilation system in comparing non-coincident measurements, e.g. comparing satellite retrievals of CO with in-situ aircraft measurements. The work described above also brought to light several short-comings of the data assimilation approach for CO profiles. Because of the limited vertical

  5. Evaluating Judicial Performance: Editors’ Introduction

    Directory of Open Access Journals (Sweden)

    Francesco Contini

    2014-12-01

    Full Text Available The articles in this issue tackle the conceptual issues associated with defining good judging and the purposes of evaluating judges, and ask such questions as: What values are central to the judicial role? What knowledge, skills, abilities, and other qualities are important to judicial performance? What does scholarship tell us about judging and judicial performance? What are the challenges in measuring judicial performance, the extent to which existing evaluation programs can capture what it means to be a judge, and the potential for developing multi-method evaluation programs? An underlying theme is the nature and desirability of linking evaluations of individual judges with evaluations of the court system and the ways in which results from performance evaluation can be incorporated into educational and other programs designed to promote improvements in the quality of the judiciary. The papers cluster around three major themes: (i Conceptual and methodological issues; (ii Experiences of evaluating judges; and (iii Empirical research findings. Los artículos de este número abordan aspectos conceptuales asociados con el hecho de juzgar de forma correcta y los propósitos de evaluar a los jueces, y plantean preguntas como: ¿qué valores son básicos en el rol judicial? ¿Qué conocimiento, aptitudes, habilidades y otras cualidades son importantes para el rendimiento judicial? ¿Qué nos dice el mundo académico sobre el hecho de juzgar y el rendimiento judicial? ¿Cuáles son los retos en la medición del rendimiento judicial, hasta qué punto los programas de evaluación existentes pueden capturar lo que significa ser un juez, y el potencial para desarrollar programas de evaluación multidisciplinares? Un tema subyacente es la naturaleza y la deseabilidad de unir evaluaciones de jueces individuales con evaluaciones del sistema judicial, y las formas en las que los resultados del rendimiento judicial se pueden incorporar en programas educativos

  6. Performance based fault diagnosis

    DEFF Research Database (Denmark)

    Niemann, Hans Henrik

    2002-01-01

    Different aspects of fault detection and fault isolation in closed-loop systems are considered. It is shown that using the standard setup known from feedback control, it is possible to formulate fault diagnosis problems based on a performance index in this general standard setup. It is also shown...

  7. Proposal and Performance Evaluation of a Multicast Routing Protocol for Wireless Mesh Networks Based on Network Load

    Directory of Open Access Journals (Sweden)

    Kiyotaka Oe

    2015-01-01

    Full Text Available Wireless Mesh Networks (WMNs can provide wide range Wireless Local Area Networks (WLANs area by connecting Access Points (APs of WLANs with each other using radio communications. A routing protocol is very important to keep communication quality over radio multihop communications because radio waves are impacted much by surrounding environment. When we use multiuser shared applications like a video conference and an IP phone, it is predicted that large amount of traffic flows on network. Therefore, we should consider network loads to use these applications. In this paper, we propose a multicast routing protocol for WMNs which considers network loads and hop count. Furthermore, we evaluate performance by simulation. In the simulation results, we show that the proposed protocol has better performance than a conventional protocol (MAODV at high loaded scenario.

  8. Synthesis and performance evaluation of a new deoiling agent for treatment of waste oil-based drilling fluids.

    Science.gov (United States)

    Liu, Pingting; Huang, Zhiyu; Deng, Hao; Wang, Rongsha; Xie, Shuixiang

    2014-01-01

    Oil-based drilling fluid is used more and more in the field of oil and gas exploration. However, because of unrecyclable treating agent and hard treatment conditions, the traditional treating technologies of waste oil-based drilling fluid have some defects, such as waste of resource, bulky equipment, complex treatment processes, and low oil recovery rate. In this work, switchable deoiling agent (SDA), as a novel surfactant for treatment of waste oil-based drilling fluid, was synthesized by amine, formic acid, and formaldehyde solution. With this agent, the waste oil-based drilling fluid can be treated without complex process and expensive equipment. Furthermore, the agent used in the treatment can be recycled, which reduces waste of resource and energy. The switch performance, deoiling performance, structural characterization, and mechanisms of action are studied. The experimental results show that the oil content of the recycled oil is higher than 96% and more than 93% oil in waste oil-based drilling fluid can be recycled. The oil content of the solid residues of deoiling is less than 3%. PMID:25045749

  9. Synthesis and Performance Evaluation of a New Deoiling Agent for Treatment of Waste Oil-Based Drilling Fluids

    Directory of Open Access Journals (Sweden)

    Pingting Liu

    2014-01-01

    Full Text Available Oil-based drilling fluid is used more and more in the field of oil and gas exploration. However, because of unrecyclable treating agent and hard treatment conditions, the traditional treating technologies of waste oil-based drilling fluid have some defects, such as waste of resource, bulky equipment, complex treatment processes, and low oil recovery rate. In this work, switchable deoiling agent (SDA, as a novel surfactant for treatment of waste oil-based drilling fluid, was synthesized by amine, formic acid, and formaldehyde solution. With this agent, the waste oil-based drilling fluid can be treated without complex process and expensive equipment. Furthermore, the agent used in the treatment can be recycled, which reduces waste of resource and energy. The switch performance, deoiling performance, structural characterization, and mechanisms of action are studied. The experimental results show that the oil content of the recycled oil is higher than 96% and more than 93% oil in waste oil-based drilling fluid can be recycled. The oil content of the solid residues of deoiling is less than 3%.

  10. Efficient Matrices for Evaluating the Performance of IEEE 802.16 based Mesh Network at Node Level

    Directory of Open Access Journals (Sweden)

    Deepak kumar

    2014-12-01

    Full Text Available Wimax stands for World Wide Interoperatability for Microwave Access. This technology is based on the IEEE 802.16 standard (also called as Broad band Wireless Access. Wimax is a telecommunication technology that provides wireless transmission of data in different transmission modes from Point-to-Point, Point-to-Multipoint providing the 75 mb/s broadband speed without the need of cables. Different Routing Protocols have been used in wireless network. This paper presented an analysis on those routing protocols especially designed for wireless networks. A study and comparison on the performance of three routing protocols (AODV, DSR, and DSDV for Mobile WiMAX environment is done. The performance matrix includes Packet Delivery fraction (PDF, Throughput, End to End Delay, and number of packet dropped were identified. The study used OPNET 14 simulator for the comparison on the performance analysis. Successfully results found that AODV protocol outperform the DSR and DSDV.

  11. Portfolio optimization and performance evaluation

    DEFF Research Database (Denmark)

    Juhl, Hans Jørn; Christensen, Michael

    2013-01-01

    customer portfolios are determined, and it is shown how marketing decision-makers can use this information in their marketing strategies to optimize the revenue growth of the company. Finally, our analysis is the first analysis which applies portfolio based methods to measure customer performance...

  12. Supplier Performance Evaluation and Rating System (SPEARS)

    International Nuclear Information System (INIS)

    The SSCL Magnet Quality Assurance Department has implemented a Supplier Performance Evaluation and Rating System (SPEARS) to assess supplier performance throughout the development and production stages of the SSCL program. The main objectives of SPEARS are to promote teamwork and recognize performance. This paper examines the current implementation of SPEARS. MSD QA supports the development and production of SSC superconducting magnets while implementing the requirements of DOE Order 5700.6C. The MSD QA program is based on the concept of continuous improvement in quality and productivity. The QA program requires that procurement of items and services be controlled to assure conformance to specification. SPEARS has been implemented to meet DOE requirements and to enhance overall confidence in supplier performance. Key elements of SPEARS include supplier evaluation and selection as well as evaluation of furnished quality through source inspection, audit, and receipt inspection. These elements are described in this paper

  13. Evaluating a Model by Forecast Performance.

    OpenAIRE

    Michael P. Clements; David F. Hendry

    2005-01-01

    Although out-of-sample forecast performance is often deemed to be the "gold standard" of evaluation, it is not in fact a good yardstick for evaluating models in general. The arguments are illustrated with reference to a recent paper by Carruth, Hooker and Oswald [Review of Economics and Statistics (1998), Vol. 80, pp. 621-628], who suggest that the good dynamic forecasts of their model support the efficiency-wage theory on which it is based.

  14. Erosion of wind turbine blade coatings - Design and analysis of jet-based laboratory equipment for performance evaluation

    DEFF Research Database (Denmark)

    Zhang, Shizhong; Dam-Johansen, Kim; Nørkjær, Sten;

    2015-01-01

    of the blades in such equipment. To reduce expensive blade maintenance repairs and to avoid out-of-service periods, energy-absorbing blade coatings are required to protect rotor blades from rain erosion. In this work we describe the design, construction and evaluation of a laboratory setup for fast screening...... of up to 22 coating samples that is based on water jet slugs. Our objective is to study the effect of the parameters involved in the rain erosion process and to correlate our experimental results with data obtained with the complex and expensive whirling arm rig, which has become the industry standard...

  15. 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.

  16. Evaluation of a BGO-Based PET System for Single-Cell Tracking Performance by Simulation and Phantom Studies.

    Science.gov (United States)

    Ouyang, Yu; Kim, Tae Jin; Pratx, Guillem

    2016-01-01

    A recent method based on positron emission was reported for tracking moving point sources using the Inveon PET system. However, the effect of scanner background noise was not further explored. Here, we evaluate tracking with the Genisys4, a bismuth germanate-based PET system, which has no significant intrinsic background and may be better suited to tracking lower and/or faster activity sources. Position-dependent sensitivity of the Genisys4 was simulated in Geant4 Application for Tomographic Emission (GATE) using a static (18)F point source. Trajectories of helically moving point sources with varying activity and rotation speed were reconstructed from list-mode data as described previously. Simulations showed that the Inveon's ability to track sources within 2 mm of localization error is limited to objects with a velocity-to-activity ratio like objects with this system. PMID:27175009

  17. Online evaluation of tracking algorithm performance

    OpenAIRE

    Chau, Duc Phu; Bremond, François; Thonnat, Monique

    2009-01-01

    In the 3rd International Conference on Imaging for Crime Detection and Prevention 2009 (ICDP), Kingston University, London, UK International audience This paper presents a method to evaluate online the performance of tracking algorithms in surveillance videos. We use a set of features to compute the confidence of trajectories and also the precision of tracking results. A global score is computed online based on these features and is used to estimate the performance of tracking algorithm...

  18. Performance-based risk-sharing arrangements-good practices for design, implementation, and evaluation: report of the ISPOR good practices for performance-based risk-sharing arrangements task force.

    Science.gov (United States)

    Garrison, Louis P; Towse, Adrian; Briggs, Andrew; de Pouvourville, Gerard; Grueger, Jens; Mohr, Penny E; Severens, J L Hans; Siviero, Paolo; Sleeper, Miguel

    2013-01-01

    There is a significant and growing interest among both payers and producers of medical products for agreements that involve a "pay-for-performance" or "risk-sharing" element. These payment schemes-called "performance-based risk-sharing arrangements" (PBRSAs)-involve a plan by which the performance of the product is tracked in a defined patient population over a specified period of time and the amount or level of reimbursement is based on the health and cost outcomes achieved. There has always been considerable uncertainty at product launch about the ultimate real-world clinical and economic performance of new products, but this appears to have increased in recent years. PBRSAs represent one mechanism for reducing this uncertainty through greater investment in evidence collection while a technology is used within a health care system. The objective of this Task Force report was to set out the standards that should be applied to "good practices"-both research and operational-in the use of a PBRSA, encompassing questions around the desirability, design, implementation, and evaluation of such an arrangement. This report provides practical recommendations for the development and application of state-of-the-art methods to be used when considering, using, or reviewing PBRSAs. Key findings and recommendations include the following. Additional evidence collection is costly, and there are numerous barriers to establishing viable and cost-effective PBRSAs: negotiation, monitoring, and evaluation costs can be substantial. For good research practice in PBRSAs, it is critical to match the appropriate study and research design to the uncertainties being addressed. Good governance processes are also essential. The information generated as part of PBRSAs has public good aspects, bringing ethical and professional obligations, which need to be considered from a policy perspective. The societal desirability of a particular PBRSA is fundamentally an issue as to whether the cost of

  19. CUDA Based Performance Evaluation of the Computational Efficiency of the DCT Image Compression Technique on Both the CPU and GPU

    Directory of Open Access Journals (Sweden)

    Kgotlaetsile Mathews Modieginyane

    2013-06-01

    Full Text Available Recent advances in computing such as the massively parallel GPUs (Graphical Processing Units,coupledwith the need to store and deliver large quantities of digital data especially images, has brought a numberof challenges for Computer Scientists, the research community and other stakeholders. These challenges,such as prohibitively large costs to manipulate the digital data amongst others, have been the focus of theresearch community in recent years and has led to the investigation of image compression techniques thatcan achieve excellent results. One such technique is the Discrete Cosine Transform, which helps separatean image into parts of differing frequencies and has the advantage of excellent energy-compaction.This paper investigates the use of the Compute Unified Device Architecture (CUDA programming modelto implement the DCT based Cordic based Loeffler algorithm for efficient image compression. Thecomputational efficiency is analyzed and evaluated under both the CPU and GPU. The PSNR (Peak Signalto Noise Ratio is used to evaluate image reconstruction quality in this paper. The results are presentedand discussed.

  20. 48 CFR 436.604 - Performance evaluation.

    Science.gov (United States)

    2010-10-01

    ... 48 Federal Acquisition Regulations System 4 2010-10-01 2010-10-01 false Performance evaluation... Performance evaluation. Preparation of performance evaluation reports. (a) In addition to the requirements of FAR 36.604, performance evaluation reports shall be prepared for indefinite-delivery type...

  1. Evaluation of algal biofilms on indium tin oxide (ITO for use in biophotovoltaic platforms based on photosynthetic performance.

    Directory of Open Access Journals (Sweden)

    Fong-Lee Ng

    Full Text Available In photosynthesis, a very small amount of the solar energy absorbed is transformed into chemical energy, while the rest is wasted as heat and fluorescence. This excess energy can be harvested through biophotovoltaic platforms to generate electrical energy. In this study, algal biofilms formed on ITO anodes were investigated for use in the algal biophotovoltaic platforms. Sixteen algal strains, comprising local isolates and two diatoms obtained from the Culture Collection of Marine Phytoplankton (CCMP, USA, were screened and eight were selected based on the growth rate, biochemical composition and photosynthesis performance using suspension cultures. Differences in biofilm formation between the eight algal strains as well as their rapid light curve (RLC generated using a pulse amplitude modulation (PAM fluorometer, were examined. The RLC provides detailed information on the saturation characteristics of electron transport and overall photosynthetic performance of the algae. Four algal strains, belonging to the Cyanophyta (Cyanobacteria Synechococcus elongatus (UMACC 105, Spirulina platensis. (UMACC 159 and the Chlorophyta Chlorella vulgaris (UMACC 051, and Chlorella sp. (UMACC 313 were finally selected for investigation using biophotovoltaic platforms. Based on power output per Chl-a content, the algae can be ranked as follows: Synechococcus elongatus (UMACC 105 (6.38×10(-5 Wm(-2/µgChl-a>Chlorella vulgaris UMACC 051 (2.24×10(-5 Wm(-2/µgChl-a>Chlorella sp.(UMACC 313 (1.43×10(-5 Wm(-2/µgChl-a>Spirulina platensis (UMACC 159 (4.90×10(-6 Wm(-2/µgChl-a. Our study showed that local algal strains have potential for use in biophotovoltaic platforms due to their high photosynthetic performance, ability to produce biofilm and generation of electrical power.

  2. Performance evaluation of an anaerobic/aerobic landfill-based digester using yard waste for energy and compost production.

    Science.gov (United States)

    Yazdani, Ramin; Barlaz, Morton A; Augenstein, Don; Kayhanian, Masoud; Tchobanoglous, George

    2012-05-01

    The objective of this study was to evaluate a new alternative for yard waste management by constructing, operating and monitoring a landfill-based two-stage batch digester (anaerobic/aerobic) with the recovery of energy and compost. The system was initially operated under anaerobic conditions for 366 days, after which the yard waste was aerated for an additional 191 days. Off gas generated from the aerobic stage was treated by biofilters. Net energy recovery was 84.3MWh, or 46kWh per million metric tons of wet waste (as received), and the biochemical methane potential of the treated waste decreased by 83% during the two-stage operation. The average removal efficiencies of volatile organic compounds and non-methane organic compounds in the biofilters were 96-99% and 68-99%, respectively.

  3. Evaluation of the reproductive performance of rabbits does fed a half-simplified diet based on cassava byproducts

    Directory of Open Access Journals (Sweden)

    Andréia Fróes Galuci Oliveira

    2011-11-01

    Full Text Available A total of 70 five-month-old female New Zealand White rabbits were assigned in a completely randomized design, over three reproductive cycles, with two treatments: a reference diet and a half-simplified diet containing 79.83% cassava byproduct. The study evaluated body weight and feed intake of does, feed cost, number and total body weight of kits at kindling and weaning per female during three cycles, number and percentage of mortality/female/cycle, and weight gain of kits from birth to weaning. No interaction was observed between the diets and among the reproductive cycles for any evaluated characteristics. The body weight of does at the moment of weaning was similar in both groups for all three reproductive cycles. However, does fed the half-simplified diet had lower feed intake during the three reproductive cycles and, consequently, more reproductive flaws. The number of kits at weaning, body weight of kits at kindling and weaning, weight gain of kits from birth to weaning, and total body weight of kits at weaning were lower for the group of does fed the half-simplified diet and, consequently, there was a higher number and percentage of dead kits in this group. The total numbers of kits at kindling and weaning and total body weight of kits at birth during all three reproductive cycles were similar between the groups; however, total body weight of weaning rabbits was higher for the animals receiving the reference diet. It is possible to conclude that although the use of the half-simplified diet decreases the reproductive performance of does, it reduces feed cost per kg of body weight by 23.63% compared with the reference diet, proving to be a viable nutritional option for rabbit production.

  4. Evaluating Performance Portability of OpenACC

    Energy Technology Data Exchange (ETDEWEB)

    Sabne, Amit J [ORNL; Sakdhnagool, Putt [ORNL; Lee, Seyong [ORNL; Vetter, Jeffrey S [ORNL

    2015-01-01

    Accelerator-based heterogeneous computing is gaining momentum in High Performance Computing arena. However, the increased complexity of the accelerator architectures demands more generic, high-level programming models. OpenACC is one such attempt to tackle the problem. While the abstraction endowed by OpenACC offers productivity, it raises questions on its portability. This paper evaluates the performance portability obtained by OpenACC on twelve OpenACC programs on NVIDIA CUDA, AMD GCN, and Intel MIC architectures. We study the effects of various compiler optimizations and OpenACC program settings on these architectures to provide insights into the achieved performance portability.

  5. Electrochemical preparation of MnO2 nanobelts through pulse base-electrogeneration and evaluation of their electrochemical performance

    Science.gov (United States)

    Aghazadeh, Mustafa; Maragheh, Mohammad Ghannadi; Ganjali, Mohammad Reza; Norouzi, Parviz; Faridbod, Farnoush

    2016-02-01

    Cathodic electrodeposition of MnO2 from a nitrate solution, via pulsed base (OH-) electrogeneration was performed for the first time. The deposition experiments were performed in a pulse current mode in typical on-times and off-times (i.e. ton = 1 s and toff = 1 s) with a peak current density of 2 mA cm-2 (Ia = 2 mA cm-2). The structural characterizations conducted by XRD and FTIR techniques revealed that the prepared MnO2 is composed of both α and γ phases. Morphological observation by SEM and TEM showed that the prepared MnO2 is made up of nanobelts with uniform shapes (an average diameter and length of 50 nm and 1 μm, respectively). Further electrochemical measurements by cyclic voltammetry and charge-discharge techniques revealed that the prepared MnO2 nanostructures have excellent capacitive behaviors, like a specific capacitance of 235.5 F g-1 and capacity retention of 91.3% after 1000 cycling at the scan rate of 25 mV s-1.

  6. The performance evaluation of a new neural network based traffic management scheme for a satellite communication network

    Science.gov (United States)

    Ansari, Nirwan; Liu, Dequan

    1991-01-01

    A neural-network-based traffic management scheme for a satellite communication network is described. The scheme consists of two levels of management. The front end of the scheme is a derivation of Kohonen's self-organization model to configure maps for the satellite communication network dynamically. The model consists of three stages. The first stage is the pattern recognition task, in which an exemplar map that best meets the current network requirements is selected. The second stage is the analysis of the discrepancy between the chosen exemplar map and the state of the network, and the adaptive modification of the chosen exemplar map to conform closely to the network requirement (input data pattern) by means of Kohonen's self-organization. On the basis of certain performance criteria, whether a new map is generated to replace the original chosen map is decided in the third stage. A state-dependent routing algorithm, which arranges the incoming call to some proper path, is used to make the network more efficient and to lower the call block rate. Simulation results demonstrate that the scheme, which combines self-organization and the state-dependent routing mechanism, provides better performance in terms of call block rate than schemes that only have either the self-organization mechanism or the routing mechanism.

  7. Security Analysis and Performance Evaluation of Enhanced Threshold Proxy Signature Scheme Based on RSA for Known Signers

    Directory of Open Access Journals (Sweden)

    Raman Kumar

    2012-08-01

    Full Text Available An efficient threshold signature scheme solves the difficulties of the receiver to proof the approval of the document from the sender as well as detecting if the file has been altered by illegitimate parties. In these days there are plenty of signature schemes such as (t,n threshold proxy signature scheme. The network is a shared medium so that the weakness security attacks such as eavesdropping, replay attack and modification attack. Thus, we have to establish a common key for encrypting/decrypting our communications over an insecure network. In this scheme, a (t,n threshold proxy signature scheme based on RSA, any t or more proxy signers can cooperatively generate a proxy signature while t-1 or fewer of them can’t do it. The threshold proxy signature scheme uses the RSA cryptosystem to generate the private and the public key of the signers. Comparison is done on the basis of time complexity, space complexity and communication overhead. We compare the performance of four schemes: Hwang et al., Wen et al., Geng et al. and Fengying et al. with the performance of a scheme that has been proposed by the authors of this article earlier. In the proposed scheme, both the combiner and the secret share holder can verify the correctness of the information that they are receiving from each other. Therefore, the enhanced threshold proxy signature scheme is secure and efficient against notorious conspiracy attacks.

  8. Isotherm Studies for Performance Evaluation of Functionalized Carbon Nanotubes (CNT Based Polymer Composite Nanofiltration Membranes for Desalination

    Directory of Open Access Journals (Sweden)

    D. Deepa

    2015-03-01

    Full Text Available Composite Nanofiltration membranes were fabricated by incorporating Carbon Nanotubes (CNT and Polyvinylidene Fluoride (PVDF membranes. A suspension was prepared by dispersing CNT (30 minutes of sonication in Dimethyl Sulfoxide (DMSO solvent for 0.5 mg/ml. This suspension after vacuum filtration dispersed over PVDF membrane of pore size 0.22µm. Excess DMSO was removed by washing using Ethanol followed by Deionized water. Normal and various functionalized (Hydroxyl (-OH, Carboxylic (-COOH, Amine (-NH2 SWCNTs and MWCNTs were purchased and the CNT based polymer composite nanofiltration membranes were fabricated by vacuum filtration method at a uniform loading of 10mg/cm2 . The experimental results were used to evaluate the TDS removal efficiency of the fabricated membrane modules, which are normal and functionalized (4 composites in both SW and MW combinations CNT. The TDS removal efficiency of all the 8 composite membranes were observed under varied operating conditions viz., varying flow rate (100,150,200 and 250 ml/hr and influent TDS (2500, 3000, 4000 and 5000 mg/l. The flux of the membrane is varied 200 to 500 lit/m2 .hr. The Isotherm studies using the experimental data on Langmuir and Freundlich isotherm models validated the results of the experiment and are indicative of the role of adsorption of the functionalized CNT based polymer composite nanofiltration membranes which removing the TDS. The results showed that the amino functionalized SWCNTs based polymer composite (PVDF/SWCNTs nanofiltration membranes can be used as an effective adsorbent for desalination due to their high adsorption capacity.

  9. Advances in the evaluation of wind-induced undercatch using CFD-based simulations of snow gauge performance

    Science.gov (United States)

    Colli, Matteo; Lanza, Luca; Rasmussen, Roy; Thériault, Julie

    2016-04-01

    Despite its importance, accurate measurements of precipitation remains a challenge. Measurement errors for solid precipitation, which are often ignored for automated systems, frequently range from 20% to 70% due to undercatch in windy conditions. While solid precipitation measurements have been the subject of many studies, there have been only a limited number of numerical modeling efforts to estimate the collection efficiency of solid precipitation gauges when exposed to the wind, in both shielded and unshielded configurations. The available models use CFD simulations of the airflow pattern generated by the aerodynamic response of the gauge/shield geometry to perform the Lagrangian tracking of solid precipitation particles (Thériault et al., 2012; Colli et al. 2016a and 2016b). Validation of the results against field observations yields similarities in the overall behavior, but the model output only approximately reproduces the dependence of the experimental collection efficiency on wind speed. We present recent developments of such a modelling approach including various gauge/shield configurations, the influence of the drag coefficient calculation on the model performance, and the role of the particle size distribution in explaining the scatter of the collection efficiency observed at any particular wind speed (Colli et al. 2015). Comparison with observations at the Marshall (CO) field test site is used to validate results of the various modelling schemes and to support the analysis of the microphysical characteristics of ice crystals. References: Colli, M., Rasmussen, R.M., Thèriault, J.M., Lanza, L.G., Baker, B.C. and J. Kochendorfer (2015). An improved trajectory model to evaluate the collection performance of snow gauges. J.Appl.Meteor.Climatol., 54(8), pages 1826-1836. Colli, M., Lanza, L.G., Rasmussen, R.M. and J.M. Thèriault (2016a). The collection efficiency of shielded and unshielded precipitation gauges. Part I: CFD airflow modelling. J. of

  10. Weighting Performance Evaluation Criteria Base in Balanced Score Card Approach with Use of Combination Method Shapley value & Bull\\'s-eye

    Directory of Open Access Journals (Sweden)

    Mohammad Hassan Kamfiroozi

    2014-05-01

    Full Text Available Performance evaluation as a control tool was considered by managers in the organizations and manufactures. In this paper we decide to present a new model for performance evaluation and industrial companies ranking at uncertain conditions. Based on this, we implemented performance evaluation based on balance score card (BSC method. Beside, we tried to use three parameter interval grey numbers in lieu of linguistic variables. Then evaluation and weighting of fourth indicators is done with use of Bulls-eye-Shapley combination method that is counted as new approach in this article. Reason of utilization of three parameter interval grey numbers and combination method was decreasing of environmental uncertainty on data and model. This combination weighting method can be used as a new method in decision making Science. At final of this paper case study was implemented on industrial companies (nail makers that ranking of these companies is obtained by use of grey-TOPSIS method (that is a generalization of classic TOPSIS for three parameter interval grey numbers.

  11. Analytical Performance Evaluation of Different Switch Solutions

    Directory of Open Access Journals (Sweden)

    Francisco Sans

    2013-01-01

    Full Text Available The virtualization of the network access layer has opened new doors in how we perceive networks. With this virtualization of the network, it is possible to transform a regular PC with several network interface cards into a switch. PC-based switches are becoming an alternative to off-the-shelf switches, since they are cheaper. For this reason, it is important to evaluate the performance of PC-based switches. In this paper, we present a performance evaluation of two PC-based switches, using Open vSwitch and LiSA, and compare their performance with an off-the-shelf Cisco switch. The RTT, throughput, and fairness for UDP are measured for both Ethernet and Fast Ethernet technologies. From this research, we can conclude that the Cisco switch presents the best performance, and both PC-based switches have similar performance. Between Open vSwitch and LiSA, Open vSwitch represents a better choice since it has more features and is currently actively developed.

  12. A multiple-image-based method to evaluate the performance of deformable image registration in the pelvis

    Science.gov (United States)

    Saleh, Ziad; Thor, Maria; Apte, Aditya P.; Sharp, Gregory; Tang, Xiaoli; Veeraraghavan, Harini; Muren, Ludvig; Deasy, Joseph

    2016-08-01

    Deformable image registration (DIR) is essential for adaptive radiotherapy (RT) for tumor sites subject to motion, changes in tumor volume, as well as changes in patient normal anatomy due to weight loss. Several methods have been published to evaluate DIR-related uncertainties but they are not widely adopted. The aim of this study was, therefore, to evaluate intra-patient DIR for two highly deformable organs—the bladder and the rectum—in prostate cancer RT using a quantitative metric based on multiple image registration, the distance discordance metric (DDM). Voxel-by-voxel DIR uncertainties of the bladder and rectum were evaluated using DDM on weekly CT scans of 38 subjects previously treated with RT for prostate cancer (six scans/subject). The DDM was obtained from group-wise B-spline registration of each patient’s collection of repeat CT scans. For each structure, registration uncertainties were derived from DDM-related metrics. In addition, five other quantitative measures, including inverse consistency error (ICE), transitivity error (TE), Dice similarity (DSC) and volume ratios between corresponding structures from pre- and post- registered images were computed and compared with the DDM. The DDM varied across subjects and structures; DDMmean of the bladder ranged from 2 to 13 mm and from 1 to 11 mm for the rectum. There was a high correlation between DDMmean of the bladder and the rectum (Pearson’s correlation coefficient, R p  =  0.62). The correlation between DDMmean and the volume ratios post-DIR was stronger (R p  =  0.51 0.68) than the correlation with the TE (bladder: R p  =  0.46 rectum: R p  =  0.47), or the ICE (bladder: R p  =  0.34 rectum: R p  =  0.37). There was a negative correlation between DSC and DDMmean of both the bladder (R p  =  -0.23) and the rectum (R p  =  -0.63). The DDM uncertainty metric indicated considerable DIR variability across subjects and structures

  13. Fabrication and performance evaluation of a metal-based bimorph piezoelectric MEMS generator for vibration energy harvesting

    Science.gov (United States)

    Kuo, Chun-Liang; Lin, Shun-Chiu; Wu, Wen-Jong

    2016-10-01

    This paper presents the development of a bimorph microelectromechanical system (MEMS) generator for vibration energy harvesting. The bimorph generator is in cantilever beam structure formed by laminating two lead zirconate titanate thick-film layers on both sides of a stainless steel substrate. Aiming to scavenge vibration energy efficiently from the environment and transform into useful electrical energy, the two piezoelectric layers on the device can be poled for serial and parallel connections to enhance the output voltage or output current respectively. In addition, a tungsten proof mass is bonded at the tip of the device to adjust the resonance frequency. The experimental result shows superior performance the generator. At the 0.5 g base excitation acceleration level, the devices pooled for serial connection and the device poled for parallel connection possess an open-circuit output voltage of 11.6 VP-P and 20.1 VP-P, respectively. The device poled for parallel connection reaches a maximum power output of 423 μW and an output voltage of 15.2 VP-P at an excitation frequency of 143.4 Hz and an externally applied based excitation acceleration of 1.5 g, whereas the device poled serial connection achieves a maximum power output of 413 μW and an output voltage of 33.0 VP-P at an excitation frequency of 140.8 Hz and an externally applied base excitation acceleration of 1.5 g. To demonstrate the feasibility of the MEMS generator for real applications, we finished the demonstration of a self-powered Bluetooth low energy wireless temperature sensor sending readings to a smartphone with only the power from the MEMS generator harvesting from vibration.

  14. 一种基于VAHP—OWA的高校辅导员评价方法%A College Counselor Performance Evaluation Method Based on VAHP- OWA

    Institute of Scientific and Technical Information of China (English)

    李永刚

    2012-01-01

    Counselors are the backbone of ideological and political education in colleges and universities. The college counselor routine performance evaluation to reflect their work performance is an important job to keep their stable development. The paper builds a counselor performance evaluation system under the development concepts which including quality indictors, duties indictors, achievements e valuating indicators, and presents a new method based on VAHP - OWA to evaluate this system. Our case study has shown that the VAHP- OWA method is easily understood and operable, which makes it a practical and effective approach for the college counselor routine performance evaluation.%辅导员是高校学生工作中的骨干力量,对辅导员的工作进行常规化评价,以反映辅导员的工作状况和绩效,是辅导员队伍稳定发展的一项重要工作内容。以发展的观念建构包括素质指标体系、职责指标体系和绩效评价指标体系在内的辅导员发展性评价指标体系,同时提出一种基于VAHP—OWA的高校辅导员评价方法,实例证明该方法简单易懂,操作性强。

  15. 13 CFR 304.4 - Performance evaluations.

    Science.gov (United States)

    2010-01-01

    ... 13 Business Credit and Assistance 1 2010-01-01 2010-01-01 false Performance evaluations. 304.4... ECONOMIC DEVELOPMENT DISTRICTS § 304.4 Performance evaluations. (a) EDA shall evaluate the management... of at least one (1) other District Organization in the performance evaluation on a...

  16. 48 CFR 2936.604 - Performance evaluation.

    Science.gov (United States)

    2010-10-01

    ... 48 Federal Acquisition Regulations System 7 2010-10-01 2010-10-01 false Performance evaluation... Performance evaluation. (a) The HCA must establish procedures to evaluate architect-engineer contractor... reports must be made using Standard Form 1421, Performance Evaluation (Architect-Engineer) as...

  17. 48 CFR 236.604 - Performance evaluation.

    Science.gov (United States)

    2010-10-01

    ... 48 Federal Acquisition Regulations System 3 2010-10-01 2010-10-01 false Performance evaluation... Architect-Engineer Services 236.604 Performance evaluation. (a) Preparation of performance reports. Use DD Form 2631, Performance Evaluation (Architect-Engineer), instead of SF 1421. (2) Prepare a...

  18. Performance evaluation of an anaerobic/aerobic landfill-based digester using yard waste for energy and compost production

    International Nuclear Information System (INIS)

    Highlights: ► Biochemical methane potential decreased by 83% during the two-stage operation. ► Net energy produced was 84.3 MWh or 46 kWh per million metric tons (Mg). ► The average removal efficiency of volatile organic compounds (VOCs) was 96–99%. ► The average removal efficiency of non-methane organic compounds (NMOCs) was 68–99%. ► The two-stage batch digester proved to be simple to operate and cost-effective. - Abstract: The objective of this study was to evaluate a new alternative for yard waste management by constructing, operating and monitoring a landfill-based two-stage batch digester (anaerobic/aerobic) with the recovery of energy and compost. The system was initially operated under anaerobic conditions for 366 days, after which the yard waste was aerated for an additional 191 days. Off gas generated from the aerobic stage was treated by biofilters. Net energy recovery was 84.3 MWh, or 46 kWh per million metric tons of wet waste (as received), and the biochemical methane potential of the treated waste decreased by 83% during the two-stage operation. The average removal efficiencies of volatile organic compounds and non-methane organic compounds in the biofilters were 96–99% and 68–99%, respectively.

  19. Performance evaluation of CCD- and mobile-phone-based near-infrared fluorescence imaging systems with molded and 3D-printed phantoms

    Science.gov (United States)

    Wang, Bohan; Ghassemi, Pejhman; Wang, Jianting; Wang, Quanzeng; Chen, Yu; Pfefer, Joshua

    2016-03-01

    Increasing numbers of devices are emerging which involve biophotonic imaging on a mobile platform. Therefore, effective test methods are needed to ensure that these devices provide a high level of image quality. We have developed novel phantoms for performance assessment of near infrared fluorescence (NIRF) imaging devices. Resin molding and 3D printing techniques were applied for phantom fabrication. Comparisons between two imaging approaches - a CCD-based scientific camera and an NIR-enabled mobile phone - were made based on evaluation of the contrast transfer function and penetration depth. Optical properties of the phantoms were evaluated, including absorption and scattering spectra and fluorescence excitation-emission matrices. The potential viability of contrastenhanced biological NIRF imaging with a mobile phone is demonstrated, and color-channel-specific variations in image quality are documented. Our results provide evidence of the utility of novel phantom-based test methods for quantifying image quality in emerging NIRF devices.

  20. Contribution analysis as an evaluation strategy in the context of a sector-wide approach: Performance-based health financing in Rwanda

    Directory of Open Access Journals (Sweden)

    Martin Noltze

    2014-12-01

    Full Text Available Sector-wide approaches (SWAps emerged as a response to donor fragmentation and non-adjusted and parallel programming. In the health sector, SWAps have received considerable support by the international donor community due to their potential to reduce inefficiencies through alignment to common procedures and hence to increase development effectiveness. Evaluating development cooperation in the context of a SWAp, however, translates into methodological challenges for evaluators who have to disentangle the cumulative effects in strongly donor-aligned, complex sector environments. In this article the authors discussed the application of a methodological strategy for evaluating development interventions in complex settings – for example in the context of a SWAp –and reflected the suitability of the approach. The authors conducted a contribution analysis, a theory-based approach to evaluation, and exemplified the approach for an intervention of performance-based financing for Rwandan health workers supported by the Rwanda-German cooperation. The findings suggested that the Rwandan system of performance based financing increased service orientation and outputs of health professionals, but also indicated that negative motivational side effects and resource constraints are real. With regard to the methodological approach, the authors conclude that contribution analysis has a high potential to evaluate development cooperation in the context of a SWAp dueto its high flexibility to use different data collection tools and its capability to assess risks and rival explanations. Challenges can be identified with regard to the efficiency of the evaluation strategy and a remaining trade-off between scope and causal strength ofevidence.

  1. 40 CFR 63.5850 - How do I conduct performance tests, performance evaluations, and design evaluations?

    Science.gov (United States)

    2010-07-01

    ... test, performance evaluation, and design evaluation in 40 CFR part 63, subpart SS, that applies to you..., performance evaluations, and design evaluations? 63.5850 Section 63.5850 Protection of Environment... conduct performance tests, performance evaluations, and design evaluations? (a) If you are using any...

  2. Performance Evaluation of Tree Object Matching

    DEFF Research Database (Denmark)

    Somchaipeng, Kerawit; Sporring, Jon; Kreiborg, Sven;

    2005-01-01

    Multi-Scale Singularity Trees (MSSTs) represents the deep structure of images in scale-space and provide both the connections between image features at different scales and their strengths. In this report we present and evaluate an algorithm that exploits the MSSTs for image matching. Two version...... database. Finally the performance is compared with algorithms based on the Scale Invariant Feature Transform (SIFT), and the Position of Catastrophes (CAT)....

  3. Subjective performance evaluations and employee careers

    DEFF Research Database (Denmark)

    Frederiksen, Anders; Lange, Fabian; Kriechel, Ben

    Firms commonly use supervisor ratings to evaluate employees when objective performance measures are unavailable. Supervisor ratings are subjective and data containing supervisor ratings typically stem from individual firm level data sets. For both these reasons, doubts persist on how useful such ...... defined peer-groups, correlate with objective career outcomes. We find many similarities across firms in how subjective ratings correlate with earnings, base pay, bonuses, promotions, demotions, separations, quits and dismissals and cautiously propose these as empirical regularities....

  4. The Development of a Scientific Evaluation System of Force-on-Force (FOF) Exercise for Performance-based Regulation in Nuclear Security

    Energy Technology Data Exchange (ETDEWEB)

    Koh, Moonsung; Jung, Myungtak [Korea Institute of Nuclear Nonproliferation and Control, Daejeon (Korea, Republic of)

    2015-05-15

    A terrorist attack or sabotage at a nuclear facility could lead result in a great amount of loss of life and social chaos, in addition to serious radiological damage. As threats have been evolved more intelligent, divergent, advanced, the international societies including IAEA encourage for all member states to establish the performance-based regulation using Forceon- Force (FOF) exercise, computer simulation. Consequently, the performance evaluation for physical protection at nuclear facilities should focus on properly reacting to threat scenarios. Physical protection should also include detecting, blocking, delaying, interrupting including the human and technical factors the adversary having malicious intention of the realistic main threat element before he accomplishes the goal based on Design Basis Threat (DBT). After the completion of the FOF evaluation system, KINAC will evaluate, and later strengthen its overall security program in response to changes in the threat environment, technological advancements, and lessons learned. As a result, substantial improvements to a nuclear facility security can be predicted. These improvements will focus on a plant security force, physical barriers, intrusion detection systems, surveillance systems, and access controls. Through the building a Force-on-Force scientific evaluation system, KINAC will establish an efficient physical protection implementation system for nuclear energy facilities.

  5. The Development of a Scientific Evaluation System of Force-on-Force (FOF) Exercise for Performance-based Regulation in Nuclear Security

    International Nuclear Information System (INIS)

    A terrorist attack or sabotage at a nuclear facility could lead result in a great amount of loss of life and social chaos, in addition to serious radiological damage. As threats have been evolved more intelligent, divergent, advanced, the international societies including IAEA encourage for all member states to establish the performance-based regulation using Forceon- Force (FOF) exercise, computer simulation. Consequently, the performance evaluation for physical protection at nuclear facilities should focus on properly reacting to threat scenarios. Physical protection should also include detecting, blocking, delaying, interrupting including the human and technical factors the adversary having malicious intention of the realistic main threat element before he accomplishes the goal based on Design Basis Threat (DBT). After the completion of the FOF evaluation system, KINAC will evaluate, and later strengthen its overall security program in response to changes in the threat environment, technological advancements, and lessons learned. As a result, substantial improvements to a nuclear facility security can be predicted. These improvements will focus on a plant security force, physical barriers, intrusion detection systems, surveillance systems, and access controls. Through the building a Force-on-Force scientific evaluation system, KINAC will establish an efficient physical protection implementation system for nuclear energy facilities

  6. Performance of bioactive PMMA-based bone cement under load-bearing conditions: an in vivo evaluation and FE simulation.

    Science.gov (United States)

    Fottner, Andreas; Nies, Berthold; Kitanovic, Denis; Steinbrück, Arnd; Mayer-Wagner, Susanne; Schröder, Christian; Heinemann, Sascha; Pohl, Ulrich; Jansson, Volkmar

    2016-09-01

    In the past, bioactive bone cement was investigated in order to improve the durability of cemented arthroplasties by strengthening the bone-cement interface. As direct bone-cement bonding may theoretically lead to higher stresses within the cement, the question arises, whether polymethylmethacrylate features suitable mechanical properties to withstand altered stress conditions? To answer this question, in vivo experiments and finite element simulations were conducted. Twelve rabbits were divided into two groups examining either bioactive polymethylmethacrylate-based cement with unchanged mechanical properties or commercially available polymethylmethacrylate cement. The cements were tested under load-bearing conditions over a period of 7 months, using a spacer prosthesis cemented into the femur. For the finite element analyses, boundary conditions of the rabbit femur were simulated and analyses were performed with respect to different loading scenarios. Calculations of equivalent stress distributions within the cements were applied, with a completely bonded cement surface for the bioactive cement and with a continuously interfering fibrous tissue layer for the reference cement. The bioactive cement revealed good in vivo bioactivity. In the bioactive cement group two failures (33 %), with complete break-out of the prosthesis occurred, while none in the reference group. Finite element analyses of simulated bioactive cement fixation showed an increase in maximal equivalent stress by 49.2 to 109.4 % compared to the simulation of reference cement. The two failures as well as an increase in calculated equivalent stress highlight the importance of fatigue properties of polymethylmethacrylate in general and especially when developing bioactive cements designated for load-bearing conditions. PMID:27530301

  7. 48 CFR 36.604 - Performance evaluation.

    Science.gov (United States)

    2010-10-01

    ... 48 Federal Acquisition Regulations System 1 2010-10-01 2010-10-01 false Performance evaluation. 36.604 Section 36.604 Federal Acquisition Regulations System FEDERAL ACQUISITION REGULATION SPECIAL... Performance evaluation. See 42.1502(f) for the requirements for preparing past performance evaluations...

  8. Performance evaluation of multi-stratum resources optimization with network functions virtualization for cloud-based radio over optical fiber networks.

    Science.gov (United States)

    Yang, Hui; He, Yongqi; Zhang, Jie; Ji, Yuefeng; Bai, Wei; Lee, Young

    2016-04-18

    Cloud radio access network (C-RAN) has become a promising scenario to accommodate high-performance services with ubiquitous user coverage and real-time cloud computing using cloud BBUs. In our previous work, we implemented cross stratum optimization of optical network and application stratums resources that allows to accommodate the services in optical networks. In view of this, this study extends to consider the multiple dimensional resources optimization of radio, optical and BBU processing in 5G age. We propose a novel multi-stratum resources optimization (MSRO) architecture with network functions virtualization for cloud-based radio over optical fiber networks (C-RoFN) using software defined control. A global evaluation scheme (GES) for MSRO in C-RoFN is introduced based on the proposed architecture. The MSRO can enhance the responsiveness to dynamic end-to-end user demands and globally optimize radio frequency, optical and BBU resources effectively to maximize radio coverage. The efficiency and feasibility of the proposed architecture are experimentally demonstrated on OpenFlow-based enhanced SDN testbed. The performance of GES under heavy traffic load scenario is also quantitatively evaluated based on MSRO architecture in terms of resource occupation rate and path provisioning latency, compared with other provisioning scheme. PMID:27137302

  9. Performance evaluation of multi-stratum resources optimization with network functions virtualization for cloud-based radio over optical fiber networks.

    Science.gov (United States)

    Yang, Hui; He, Yongqi; Zhang, Jie; Ji, Yuefeng; Bai, Wei; Lee, Young

    2016-04-18

    Cloud radio access network (C-RAN) has become a promising scenario to accommodate high-performance services with ubiquitous user coverage and real-time cloud computing using cloud BBUs. In our previous work, we implemented cross stratum optimization of optical network and application stratums resources that allows to accommodate the services in optical networks. In view of this, this study extends to consider the multiple dimensional resources optimization of radio, optical and BBU processing in 5G age. We propose a novel multi-stratum resources optimization (MSRO) architecture with network functions virtualization for cloud-based radio over optical fiber networks (C-RoFN) using software defined control. A global evaluation scheme (GES) for MSRO in C-RoFN is introduced based on the proposed architecture. The MSRO can enhance the responsiveness to dynamic end-to-end user demands and globally optimize radio frequency, optical and BBU resources effectively to maximize radio coverage. The efficiency and feasibility of the proposed architecture are experimentally demonstrated on OpenFlow-based enhanced SDN testbed. The performance of GES under heavy traffic load scenario is also quantitatively evaluated based on MSRO architecture in terms of resource occupation rate and path provisioning latency, compared with other provisioning scheme.

  10. 40 CFR 63.2354 - What performance tests, design evaluations, and performance evaluations must I conduct?

    Science.gov (United States)

    2010-07-01

    ... evaluations, and performance evaluations must I conduct? 63.2354 Section 63.2354 Protection of Environment... tests, design evaluations, and performance evaluations must I conduct? (a)(1) For each performance test... procedures specified in subpart SS of this part. (3) For each performance evaluation of a continuous...

  11. Method of evaluating the reactor core performance

    International Nuclear Information System (INIS)

    Purpose: To enable exact evaluation for the core performance in a short period. Constitution: A reactor core is equally divided into 2, 4 or 8 sections considering the structure of the symmetricalness and calculation for the evaluation the core performance is carried out to at least one region of the divided core. However, the reactor core can not be said to be completely symmetrical and there is a difference more or less, because if identical type fuels are loaded the way of burning is different depending on the positions, thereby causing difference in the total heat calorie generated. Accordingly, the performance evaluation is conducted for the entire core at a predetermined time interval, the compensation value for each of the fuels is calculated based on the result of the calculation for the entire core and the corresponding result of the calculation in each of the divided cores and the compensated values are added to the calculation result for the divided cores to compensate the calculated evaluation value. This enables to shorten the calculation time and improve the calculation accuracy. (Yoshino, Y.)

  12. Autonomous Navigation Performance Evaluation Method Based on Trajectory Analysis%基于轨迹分析的自主导航性能评估方法

    Institute of Scientific and Technical Information of China (English)

    王勇鑫; 钱徽; 金卓军; 朱淼良

    2011-01-01

    在马尔可夫决策模型框架下,提出一种基于轨迹分析的计算评估方法,通过分析驾驶回报设置和车辆轨迹的特征期望衡量自主导航系统的性能.假定回报函数是回报特征的线性组合,通过逼近不同的车辆自主驾驶策略,求解应用于沙盒场景的回报设置,从而仿真导航轨迹的特征期望.实验结果表明,该方法能对自主导航系统的轨迹数据实现定性和定量评估.%This paper proposes a novel trajectory-analysis-based performance evaluation method, which assesses and compares the navigation performances by reward settings and feature expectations under Markov Decision Process(MDP) framework. Assuming that the reward function is a linear combination of known features, this method evaluates reward settings by approximating the driving styles of different land autonomous navigation systems. On this basis, reward settings are used to simulate the feature expectations of navigation trajectories in a standard land navigation environment called the sandbox. Experimental results show the validity of this method in both qualitative and quantitative performance evaluations.

  13. Synthesis and Performance Evaluation of a New Deoiling Agent for Treatment of Waste Oil-Based Drilling Fluids

    OpenAIRE

    Pingting Liu; Zhiyu Huang; Hao Deng; Rongsha Wang; Shuixiang Xie

    2014-01-01

    Oil-based drilling fluid is used more and more in the field of oil and gas exploration. However, because of unrecyclable treating agent and hard treatment conditions, the traditional treating technologies of waste oil-based drilling fluid have some defects, such as waste of resource, bulky equipment, complex treatment processes, and low oil recovery rate. In this work, switchable deoiling agent (SDA), as a novel surfactant for treatment of waste oil-based drilling fluid, was synthesized by am...

  14. Performance Evaluation of a SOA-based Rack-To-Rack Switch for Optical Interconnects Exploiting NRZ-DPSK

    DEFF Research Database (Denmark)

    Karinou, Fotini; Borkowski, Robert; Prince, Kamau;

    2012-01-01

    We experimentally study the transmission performance of 10-Gb/s NRZ-DPSK through concatenated AWG MUX/DMUXs and SOAs employed in an optimized 64×64 optical supercomputer interconnect architecture. NRZ-DPSK offers 9-dB higher dynamic range compared to conventional IM/DD.......We experimentally study the transmission performance of 10-Gb/s NRZ-DPSK through concatenated AWG MUX/DMUXs and SOAs employed in an optimized 64×64 optical supercomputer interconnect architecture. NRZ-DPSK offers 9-dB higher dynamic range compared to conventional IM/DD....

  15. Performance evaluation of a SDN/OpenFlow-based distributed mobility management (DMM) approach in virtualized LTE systems

    NARCIS (Netherlands)

    Valtulina, Luca; Karimzadeh, Morteza; Karagiannis, Georgios; Heijenk, Geert; Pras, Aiko

    2014-01-01

    Currently most of the mobility management solutions rely on a centralized mobility anchor entity, which is in charge of both mobility-related control plane and user data forwarding. This makes mobility management prone to several performance limitations such as suboptimal routing, low scalability, p

  16. Performance Evaluation of Image Fusion Algorithms for Underwater Images-A study based on PCA and DWT

    Directory of Open Access Journals (Sweden)

    Ansar MK

    2014-11-01

    Full Text Available In this paper, a comparative study between two image fusion algorithm based on PCA and DWT is carried out in underwater image domain. Underwater image fusion is emerged as one of the main image fusion area, here two or more images will be fused by retaining the most desirable characteristics of each underwater images. The DWT technique is used to decompose the input image into four frequency sub bands and the low-low sub band images will be considered in fusion processing. In PCA method significant eigen values will be considered in fusion process to retain the important characteristics of the input images. The results acquired from both experiments are tabulated and compared by considering the statistical measures such as Peak Signal to Noise Ratio (PSNR, Mean Square Error (MSE and Entropy. Results shows that underwater image fusion based on DWT outperforms the PCA based method.

  17. Theory and Practice on Teacher Performance Evaluation

    Institute of Scientific and Technical Information of China (English)

    Cai Yonghong; Lin Chongde

    2006-01-01

    Tcacher performance evaluation plays a key role in educational personnel reform.so it has been an important yet difficult issue in educational reform.Previous evaluations on teachers failed to make strict distinction among the three dominant types of evaluation,namely,capability,achievement.and effectiveness.Moreover,teacher performance evaluation was usually restricted to task performance,neglecting contextual performance.Most researches done in teachers'evaluation were only about college teachers.This Paper suggests that teacher performance evaluation should find its theoretical foundation in teacher performance constructs.After making literature review,critical case study,critical interview,and qualitative research,the authors propose a new construct of teacher performance and make necessary analysis for the construct of reliability and validity in empirical approaches.

  18. Constructing Taipei City Sports Centre Performance Evaluation Model with Fuzzy MCDM Approach Based on Views of Managers

    Directory of Open Access Journals (Sweden)

    Chen-Yang Wang

    2013-01-01

    Full Text Available This study aims to utilize the fuzzy analytical/network process (FAHP/FANP and decision-making trial and evaluation laboratory (DEMATEL approach to recognize the influential indicators of sport centre business management in Taipei city’s sports centre. Twenty-three of sports centres with six-dimensions were identified from the literature review and interview with twelve experts (academic and practical experience. By considering the interrelationships among the indices, DEMATEL was used to deal with the importance and causal relationships among the evaluation indices of sports centre. Then, we employ the FAHP/FANP to determine the weight of each management criterion. Our empirical results provide two main insights: first, sports centre business management strategies comprise six-dimensions and 23 indexes; second, the FANP analysis shows that the six key factors are (in order of priority service price, site conditions, operations management, traffic conditions, sports products, and staff quality. This study uses the FANP and DEMATEL along with mathematical computing in order to provide sports centre managers with a reliable decision-making reference and to assist them in formulating the most effective business strategy possible.

  19. Applying distance-to-target weighing methodology to evaluate the environmental performance of bio-based energy, fuels, and materials

    NARCIS (Netherlands)

    Weiss, M.; Patel, M.K.; Heilmeier, H.; Bringezu, S.

    2007-01-01

    The enhanced use of biomass for the production of energy, fuels, and materials is one of the key strategies towards sustainable production and consumption. Various life cycle assessment (LCA) studies demonstrate the great potential of bio-based products to reduce both the consumption of non-renewabl

  20. Fabrication and performance evaluation of hybrid supercapacitor electrodes based on carbon nanotubes and sputtered TiO2

    Science.gov (United States)

    Aravinda, L. S.; Nagaraja, K. K.; Nagaraja, H. S.; Udaya Bhat, K.; Ramachandra Bhat, B.

    2016-08-01

    We report a simple and eco-friendly method for the fabrication of a titanium dioxide/functionalized multiwalled carbon nanotube (TiO2/FMWCNT) composite electrode for use in supercapacitors. The nanocomposite electrodes were formed by depositing titanium dioxide onto FMWCNTs using reactive magnetron sputtering, thus providing a green roue for the formation of the binder-free composite electrode. It is shown that the electrochemical performance of the fabricated electrodes can be altered by tuning the thickness of the titanium dioxide overlayer. The integrated nanocomposite electrode showed an improved specific capacitance of 90 Fg‑1 in two-electrode configuration.

  1. A Novel Hybrid Evaluation Model for the Performance of ERP Project Based on ANP and Improved Matter-Element Extension Model

    Directory of Open Access Journals (Sweden)

    Zhao Hui-ru

    2013-01-01

    Full Text Available Considerable resources are needed when implementing the ERP project, so it is necessary to evaluate its performance. Firstly, the evaluation index system of implementation performance of the ERP project was built, and an Analytic Network Process (ANP which can fully take the relationship between evaluation indexes into account was employed to determine the index weight. Secondly, an improved matter-element extension model, which can overcome the limitations and inadequacies of traditional matter-element extension model when performing the comprehensive evaluation, was proposed to evaluate the implementation performance of the ERP project. Finally, taking an enterprise's ERP project as an example, a comprehensive evaluation was done, and the empirical analysis result shows that this proposed hybrid evaluation model is feasible and practical.

  2. IMU navigation performance evaluation method based on signal grafting technology%基于信号嫁接技术的IMU导航性能评估方法

    Institute of Scientific and Technical Information of China (English)

    高琳; 班亚龙; 牛小骥

    2015-01-01

    为了探究新型惯性测量单元( IMU)的导航定位精度以便选用,需要对其进行方便有效和低成本的测试评估。对一种新颖的基于信号嫁接技术的IMU导航性能评估方法进行了验证和分析。以三种中低精度IMU为样本,将该方法的评估结果与该IMU的现场测试结果对比,从而对该方法的评估效果进行验证。结果表明:相对于IMU的仿真评估,使用信号嫁接技术合成出的IMU数据在导航性能上与现场测试结果有更高的一致性,更为有效和可信。该方法相比于权威的现场测试评估具有成本低、效率高的独特优势,在中低精度惯性器件性能评估上具有很高的应用价值。%In order to evaluate navigation performance of inertial measurement unit( IMU),convenient,efficient and low-cost evaluation methods are needed. A new method based on signal grafting is verified and analyzed,to evaluate the navigation performance of IMU. Three kinds of medium and low precision IMUs are used as samples, to check the evaluation effectiveness of the proposed method,the evaluation results using this method are compared with their actual road test results. Experimental results show that the navigation performances of the grafted IMU data matched much better with that of the real IMU data compared with the simulation IMU data. The proposed signal grafting method is not only reliable and feasible,but also low-cost and efficient,therefore,it has high application value in IMU performance evaluation of medium and low precision.

  3. Evaluation on Construction Enterprises’ KPI Safety Performance Based on SEM%基于SEM的建筑施工企业KPI安全绩效评价

    Institute of Scientific and Technical Information of China (English)

    刘霁; 李云; 刘浪

    2011-01-01

    Considering the importance of production safety, service quality management, overall quality of employees and work efficiency of construction enterprises, the safety production factors of construction enterprises are discussed, and the safety performance of construction enterprises is evaluated comprehensively and objectively. The safety performance evaluation index system of construction enterprises is established by the KPI established based on the four dimensions of human factors, management systems, construction equipment and environmental conditions. The theory of structural equation model is introduced to the evaluation system, and the SEM of safety performance is established. The general procedure of the e-valuation method is summarized, and an applied example of quantitatively evaluating the safety performance of a certain construction enterprise is given. The results show that the factors influencing safety performance of the construction enterprise are man, management system, environmental condition and construction equipment in order according to their influencing importance degree.%鉴于建筑施工企业生产安全和服务质量管理以及企业员工综合素质和工作效率的重要性,探讨影响建筑施工企业安全生产的因素,并对建筑施工企业的安全绩效进行全面、客观的评价.采用关键绩效指标(KPI)建立基于人的因素、管理制度、施工设备和环境条件四维度的建筑施工企业安全绩效评价指标体系,研究将结构方程模型理论引入到评价体系中,构建安全绩效评价的结构方程模型(SEM).总结评价的一般程序,并结合实例,从定量的角度对某建筑施工企业安全绩效进行评价.结果表明,KPI评价体系和SEM评价模型评估得出建筑企业安全绩效影响因素的程度是:人的因素>管理制度>环境条件>施工设备.

  4. Medicare Administrative Contractor Performance Evaluation

    Data.gov (United States)

    U.S. Department of Health & Human Services — The Centers for Medicare and Medicaid Services (CMS) has compiled a summary of overall Medicare Administrative Contractor (MAC) performance information as measured...

  5. 基于AHP与云模型的软件过程绩效评价方法%Software process performance evaluation based on AHP and cloud model

    Institute of Scientific and Technical Information of China (English)

    刘东飞

    2013-01-01

    To make software quality better and improvement the organization software process capability, software process performance evaluation based on AHP and cloud model is proposed. Under the premise of the analysis of organization process goal, process-sub process-measure items mapping is established. Through the collection of organization historical data, based on project measurement and product measurement, the process baseline is constructed. The AHP method determines the weight value of the various levels relative to the goal quantitatively. Based on the value, to analyze project measurement and product measurement, the cloud model is presented to evaluate process performance qualitatively, continuous improvement software process capability quantitatively. Finally, a practical application example is given out to prove the feasibility of the evaluation method.%为改进软件质量和提高组织软件过程能力,提出了一种基于AHP与云模型的软件过程绩效评价方法.在对组织过程目标分析的前提下,建立起过程-子过程-度量项的映射关系.通过采集组织的历史数据,以项目测量和产品测量为基础,建立过程基线,运用AHP方法定量的确定出各层次对目标的权重值.基于此,结合云模型分析项目测量和产品测量数据,对过程绩效进行定性评价,持续性量化的改进软件过程能力.同时还给出了该方法的实际应用,应用结果表明了该评价方法的可行性.

  6. An Interactive Content Based Image Retrieval Technique and Evaluation of its Performance in High Dimensional and Low Dimensional Space

    Directory of Open Access Journals (Sweden)

    Nirmalya Chowdhury

    2010-09-01

    Full Text Available In this paper we have developed an Interactive Content Based Image Retrieval System which aims at selecting the most informative images with respect to the query image by ranking the retrieved images. The system uses relevance feedback to iteratively train the Histogram Intersection Kernel Based Support Vector Machine Classifier. At the end of the training phase of the classifier, the relevant set of images given by the final iteration of the relevance feedback is collected. In the retrieval phase, a ranking of the images in this relevant set is done on the basis of their Histogram Intersection based similarity measure with query image. We improved the method further by reducing dimensions of the feature vector of the images using Principle Component Analysis along with rejecting the zero components which are caused by sparseness of the pixels in the color bins of the histograms. The experiments have been done on a 6 category database created whose sample images are given in this paper. The dimensionality of the feature vectors of the images was initially 72. After feature reduction process, it becomes 59. The dimensionality reduction makes the system more robust and computationally efficient. The experimental results also agree with this fact.

  7. A hybrid algorithm for instant optimization of beam weights in anatomy-based intensity modulated radiotherapy: a performance evaluation study

    International Nuclear Information System (INIS)

    The study aims to introduce a hybrid optimization algorithm for anatomy-based intensity modulated radiotherapy (AB-IMRT). Our proposal is that by integrating an exact optimization algorithm with a heuristic optimization algorithm, the advantages of both the algorithms can be combined, which will lead to an efficient global optimizer solving the problem at a very fast rate. Our hybrid approach combines Gaussian elimination algorithm (exact optimizer) with fast simulated annealing algorithm (a heuristic global optimizer) for the optimization of beam weights in AB-IMRT. The algorithm has been implemented using MATLAB software. The optimization efficiency of the hybrid algorithm is clarified by (i) analysis of the numerical characteristics of the algorithm and (ii) analysis of the clinical capabilities of the algorithm. The numerical and clinical characteristics of the hybrid algorithm are compared with Gaussian elimination method (GEM) and fast simulated annealing (FSA). The numerical characteristics include convergence, consistency, number of iterations and overall optimization speed, which were analyzed for the respective cases of 8 patients. The clinical capabilities of the hybrid algorithm are demonstrated in cases of (a) prostate and (b) brain. The analyses reveal that (i) the convergence speed of the hybrid algorithm is approximately three times higher than that of FSA algorithm (ii) the convergence (percentage reduction in the cost function) in hybrid algorithm is about 20% improved as compared to that in GEM algorithm (iii) the hybrid algorithm is capable of producing relatively better treatment plans in terms of Conformity Index (CI) (∼ 2% - 5% improvement) and Homogeneity Index (HI) (∼ 4% - 10% improvement) as compared to GEM and FSA algorithms (iv) the sparing of organs at risk in hybrid algorithm-based plans is better than that in GEM-based plans and comparable to that in FSA-based plans; and (v) the beam weights resulting from the hybrid algorithm are

  8. An Experimental Performance Evaluation and Compatibility Study of the Bluetooth Low Energy Based Platform for ECG Monitoring in WBANs

    OpenAIRE

    Farid Touati; Ochirkhand Erdene-Ochir; Waiser Mehmood; Ammad Hassan; Adel Ben Mnaouer; Brahim Gaabab; Rasid, Mohd Fadlee A.; Lazhar Khriji

    2015-01-01

    A long term healthcare monitoring system requires battery operated devices with low-power technologies. Researchers tried to adapt various short-range technologies for Wireless Body Area Networks (WBANs) in ubiquitous health monitoring. The classical Bluetooth is known for its greedy power consumption, IrDA and NFC require line-of-sight conditions, and ANT has weak coexistence features and interference issues. A typical choice remains ZigBee/6LoWPAN over IEEE 802.15.4 based solutions in WBANs...

  9. Performance evaluation of computer and communication systems

    CERN Document Server

    Le Boudec, Jean-Yves

    2011-01-01

    … written by a scientist successful in performance evaluation, it is based on his experience and provides many ideas not only to laymen entering the field, but also to practitioners looking for inspiration. The work can be read systematically as a textbook on how to model and test the derived hypotheses on the basis of simulations. Also, separate parts can be studied, as the chapters are self-contained. … the book can be successfully used either for self-study or as a supplementary book for a lecture. I believe that different types of readers will like it: practicing engineers and resea

  10. Performance Evaluation of Electronic Resources Based on Grey Theory%基于灰色理论的图书馆电子资源绩效评价

    Institute of Scientific and Technical Information of China (English)

    李顺文; 安琪; 孙拥军

    2011-01-01

    Take the Library of Lanzhou College of Finance and Economics as an example,using gray statistical theory to calculate gray-class decision-making factor,determine the decision vector and establish the performance e-valuation index system and evaluation modelibrary of electronic resources. Based on the principle of systematic reviews to quantitative evaluation the relevant indicators,and prove that evaluation model is reasonable and feasible.%以兰州商学院图书馆为例,应用灰色统计理论,计算灰类决策系数并确定决策向量,建立了图书馆电子资源绩效评价的指标体系和评估模型.依据系统评价原则,通过实例对相关的指标体系进行了定量评价,证明评估模型的合理性和可操作性.

  11. Dentin bonding performance using Weibull statistics and evaluation of acid-base resistant zone formation of recently introduced adhesives.

    Science.gov (United States)

    Guan, Rui; Takagaki, Tomohiro; Matsui, Naoko; Sato, Takaaki; Burrow, Michael F; Palamara, Joseph; Nikaido, Toru; Tagami, Junji

    2016-07-30

    Dentin bonding durability of recently introduced dental adhesives: Clearfil SE Bond 2 (SE2), Optibond XTR (XTR), and Scotchbond Universal (SBU) was investigated using Weibull analysis as well as analysis of the micromorphological features of the acid-base resistant zone (ABRZ) created for the adhesives. The bonding procedures of SBU were divided into three subgroups: self-etch (SBS), phosphoric acid (PA) etching on moist (SBM) or dry dentin (SBD). All groups were thermocycled for 0, 5,000 and 10,000 cycles followed by microtensile bond strength testing. Acid-base challenge was undertaken before SEM and TEM observations of the adhesive interface. The etch-and-rinse method with SBU (SBM and SBD) created inferior interfaces on the dentin surface which resulted in reduced bond durability. ABRZ formation was detected with the self-etch adhesive systems; SE2, XTR and SBS. In the PA etching protocols of SBM and SBD, a thick hybrid layer but no ABRZ was detected, which might affect dentin bond durability. PMID:27335136

  12. Performance evaluation of object based greenhouse detection from Sentinel-2 MSI and Landsat 8 OLI data: A case study from Almería (Spain)

    Science.gov (United States)

    Novelli, Antonio; Aguilar, Manuel A.; Nemmaoui, Abderrahim; Aguilar, Fernando J.; Tarantino, Eufemia

    2016-10-01

    This paper shows the first comparison between data from Sentinel-2 (S2) Multi Spectral Instrument (MSI) and Landsat 8 (L8) Operational Land Imager (OLI) headed up to greenhouse detection. Two closely related in time scenes, one for each sensor, were classified by using Object Based Image Analysis and Random Forest (RF). The RF input consisted of several object-based features computed from spectral bands and including mean values, spectral indices and textural features. S2 and L8 data comparisons were also extended using a common segmentation dataset extracted form VHR World-View 2 (WV2) imagery to test differences only due to their specific spectral contribution. The best band combinations to perform segmentation were found through a modified version of the Euclidian Distance 2 index. Four different RF classifications schemes were considered achieving 89.1%, 91.3%, 90.9% and 93.4% as the best overall accuracies respectively, evaluated over the whole study area.

  13. A Cochlear Implant Performance Prognostic Test Based on Electrical Field Interactions Evaluated by eABR (Electrical Auditory Brainstem Responses)

    Science.gov (United States)

    Guevara, Nicolas; Hoen, Michel; Truy, Eric; Gallego, Stéphane

    2016-01-01

    Background Cochlear implants (CIs) are neural prostheses that have been used routinely in the clinic over the past 25 years. They allow children who were born profoundly deaf, as well as adults affected by hearing loss for whom conventional hearing aids are insufficient, to attain a functional level of hearing. The “modern” CI (i.e., a multi-electrode implant using sequential coding strategies) has yielded good speech comprehension outcomes (recognition level for monosyllabic words about 50% to 60%, and sentence comprehension close to 90%). These good average results however hide a very important interindividual variability as scores in a given patients’ population often vary from 5 to 95% in comparable testing conditions. Our aim was to develop a prognostic model for patients with unilateral CI. A novel method of objectively measuring electrical and neuronal interactions using electrical auditory brainstem responses (eABRs) is proposed. Methods and Findings The method consists of two measurements: 1) eABR measurements with stimulation by a single electrode at 70% of the dynamic range (four electrodes distributed within the cochlea were tested), followed by a summation of these four eABRs; 2) Measurement of a single eABR with stimulation from all four electrodes at 70% of the dynamic range. A comparison of the eABRs obtained by these two measurements, defined as the monaural interaction component (MIC), indicated electrical and neural interactions between the stimulation channels. Speech recognition performance without lip reading was measured for each patient using a logatome test (64 "vowel-consonant-vowel"; VCV; by forced choice of 1 out of 16). eABRs were measured in 16 CI patients (CIs with 20 electrodes, Digisonic SP; Oticon Medical ®, Vallauris, France). Significant correlations were found between speech recognition performance and the ratio of the amplitude of the V wave of the eABRs obtained with the two measurements (Pearson's linear regression

  14. 基于BSC的企业知识管理绩效评价模型及评价方法研究%Study on Performance Evaluation Model and Evaluation Method of Enterprise Knowledge Management Based on Balanced Score Card

    Institute of Scientific and Technical Information of China (English)

    张瑞红

    2011-01-01

    This article analyzes the relationship between balanced score card and knowledge management performance evaluation , and constructs the fuzzy comprehensive evaluation model of the performance evaluation indicators system based on balanced score card by analytic hierarchy process. Finally, the paper uses the model to evaluate the knowledge management performance by AHP - FCE. A quantifiable scientific evaluation method is provided.%分析出平衡计分卡和知识管理绩效评价的关系,应用层次分析法从平衡计分卡角度构建了知识管理绩效评价指标体系的三层模糊综合评价模型,结合该模型运用AHP-FCE方法对知识管理绩效进行评价,为知识管理绩效评价提供了可量化的科学评价方法.

  15. Treatment of agro based industrial wastewater in sequencing batch reactor: performance evaluation and growth kinetics of aerobic biomass.

    Science.gov (United States)

    Lim, J X; Vadivelu, V M

    2014-12-15

    A sequencing batch reactor (SBR) with a working volume of 8 L and an exchange ratio of 25% was used to enrich biomass for the treatment of the anaerobically treated low pH palm oil mill effluent (POME). The influent concentration was stepwise increased from 5000 ± 500 mg COD/L to 11,500 ± 500 mg COD/L. The performance of the reactor was monitored at different organic loading rates (OLRs). It was found that approximately 90% of the COD content of the POME wastewater was successfully removed regardless of the OLR applied to the SBR. Cycle studies of the SBR show that the oxygen uptake by the biomass while there is no COD reduction may be due to the oxidation of the storage product by the biomass. Further, the growth kinetic parameters of the biomass were determined in batch experiments using respirometer. The maximum specific growth rate (μmax) was estimated to be 1.143 day(-1) while the half saturation constant (Ks) with respect to COD was determined to be 0.429 g COD/L. The decay coefficient (bD) and biomass yield (Y) were found to be 0.131 day(-1) and 0.272 mg biomass/mg COD consumed, respectively.

  16. Toward More Performance Evaluation in Chemistry

    Science.gov (United States)

    Rasp, Sharon L.

    1998-01-01

    The history of the author's experiences in testing and changes in evaluation philosophy are chronicled. Tests in her classroom have moved from solely paper-pencil, multiple-choiced/objective formats to include also lab performance evaluatiors. Examples of performance evaluations in both a traditional chemistry course and a consumer-level chmistry course are given. Analysis of test results rof students indicates the need to continue to include a variety of methods in evaluating student performance in science.

  17. Performance evaluation of lunar penetrating radar onboard the rover of CE-3 probe based on results from ground experiments

    International Nuclear Information System (INIS)

    Lunar Penetrating Radar (LPR) onboard the rover that is part of the Chang'e-3 (CE-3) mission was firstly utilized to obtain in situ measurements about geological structure on the lunar surface and the thickness of the lunar regolith, which are key elements for studying the evolutional history of lunar crust. Because penetration depth and resolution of LPR are related to the scientific objectives of this mission, a series of ground-based experiments using LPR was carried out, and results of the experimental data were obtained in a glacial area located in the northwest region of China. The results show that the penetration depth of the first channel antenna used for LPR is over 79 m with a resolution of 2.8 m, and that for the second channel antenna is over 50.8 m with a resolution of 17.1 cm

  18. The Performance of Dammar-based Paint System Evaluated by Electrochemical Impedance Spectroscopy (EIS) and Potential Time Measurement (PTM)

    Science.gov (United States)

    Omar, N. M.; Ahmad, A. Hanom

    2009-06-01

    The coating resistance of the Dammar-based paint system was determined by using Electrochemical Impedance Spectroscopy (EIS), whereas, the corrosion potential analysis was determined by using potential time measurement (PTM) method. Carotenoid pigment obtained from Capsicum Annum (dried chili pepper) was added into the mixture of dammar and acrylic polyol resin and the paint systems were proofed on Aluminium steel Q-panels as a substrate. Result shows that the paint system with a composition of 35% dammar (CD35%) possessed the higher corrosion resistance after 30 days of exposure in 3% NaCl solution for electrochemical impedance spectroscopy and also can withstand the longest time for delimitation protection in PTM analysis. The results prove that the developed organic paint system can improve the electrochemical and corrosion protection properties of a paint system.

  19. Evaluating harvest-based control of invasive fish with telemetry: Performance of sea lamprey traps in the Great Lakes

    Science.gov (United States)

    Holbrook, Christopher; Bergstedt, Roger A.; Barber, Jessica M.; Bravener, Gale A; Jones, Michael L.; Krueger, Charles C.

    2016-01-01

    Physical removal (e.g., harvest via traps or nets) of mature individuals may be a cost-effective or socially acceptable alternative to chemical control strategies for invasive species, but requires knowledge of the spatial distribution of a population over time. We used acoustic telemetry to determine the current and possible future role of traps to control and assess invasive sea lampreys, Petromyzon marinus, in the St. Marys River, the connecting channel between Lake Superior and Lake Huron. Exploitation rates (i.e., fractions of an adult sea lamprey population removed by traps) at two upstream locations were compared among three years and two points of entry to the system. Telemetry receivers throughout the drainage allowed trap performance (exploitation rate) to be partitioned into two components: proportion of migrating sea lampreys that visited trap sites (availability) and proportion of available sea lampreys that were caught by traps (local trap efficiency). Estimated exploitation rates were well below those needed to provide population control in the absence of lampricides and were limited by availability and local trap efficiency. Local trap efficiency estimates for acoustic-tagged sea lampreys were lower than analogous estimates regularly obtained using traditional mark–recapture methods, suggesting that abundance had been previously underestimated. Results suggested major changes would be required to substantially increase catch, including improvements to existing traps, installation of new traps, or other modifications to attract and retain more sea lampreys. This case study also shows how bias associated with telemetry tags can be estimated and incorporated in models to improve inferences about parameters that are directly relevant to fishery management.

  20. Metrics for Offline Evaluation of Prognostic Performance

    Data.gov (United States)

    National Aeronautics and Space Administration — Prognostic performance evaluation has gained significant attention in the past few years.*Currently, prognostics concepts lack standard definitions and suffer from...

  1. On the development and performance evaluation of a multiobjective GA-based RBF adaptive model for the prediction of stock indices

    Directory of Open Access Journals (Sweden)

    Babita Majhi

    2014-09-01

    Full Text Available This paper develops and assesses the performance of a hybrid prediction model using a radial basis function neural network and non-dominated sorting multiobjective genetic algorithm-II (NSGA-II for various stock market forecasts. The proposed technique simultaneously optimizes two mutually conflicting objectives: the structure (the number of centers in the hidden layer and the output mean square error (MSE of the model. The best compromised non-dominated solution-based model was determined from the optimal Pareto front using fuzzy set theory. The performances of this model were evaluated in terms of four different measures using Standard and Poor 500 (S&P500 and Dow Jones Industrial Average (DJIA stock data. The results of the simulation of the new model demonstrate a prediction performance superior to that of the conventional radial basis function (RBF-based forecasting model in terms of the mean average percentage error (MAPE, directional accuracy (DA, Thelis’ U and average relative variance (ARV values.

  2. 基于模糊综合评价的客户知识管理绩效评价研究%Fuzzy Comprehensive Evaluation Based on Customer Knowledge Management Performance Evaluation

    Institute of Scientific and Technical Information of China (English)

    李玉保

    2012-01-01

    In this paper, the perfonnance evaluation of customer knowledge management is regarded as the research object. First of all, the paper analyzes enterprise knowledge management perfonnance evaluation and customer knowledge management. Then, based on CMAT,it builds the customer knowledge management performance evaluation index system. Finally, it gives the model the evaluation process of the fuzzy comprehensive evaluation. All of the information can provide a research framework to cany out customer knowledge management performance evaluation effectively for enterprises.%以客户知识管理绩效评价为研究对象.对企业知识管理绩效评价和客户知识管理进行了分析.建立了基于CMAT的客户知识管理绩效评价指标体系.给出了模糊综合评价的评价过程模型.为企业有效实施客户知识管理绩效评价提供了一个研究框架.

  3. Performance management in the Slovak higher education system: preliminary evaluation

    OpenAIRE

    Juraj Nemec

    2007-01-01

    The aim of our paper is a preliminary evaluation of the introduction of performance management and performance financing arrangements in the Slovak higher education system – accreditation and formula based performance financing. This evaluation will be mainly based on the assessment of short-term impacts of the above mentioned instruments and is expected to invite further professional discussion. We feel that the data and brief analysis included are sufficient enough to show that the Slovak s...

  4. TAP 2: Performance-Based Training Manual

    International Nuclear Information System (INIS)

    Cornerstone of safe operation of DOE nuclear facilities is personnel performing day-to-day functions which accomplish the facility mission. Performance-based training is fundamental to the safe operation. This manual has been developed to support the Training Accreditation Program (TAP) and assist contractors in efforts to develop performance-based training programs. It provides contractors with narrative procedures on performance-based training that can be modified and incorporated for facility-specific application. It is divided into sections dealing with analysis, design, development, implementation, and evaluation

  5. TAP 2: Performance-Based Training Manual

    Energy Technology Data Exchange (ETDEWEB)

    1993-08-01

    Cornerstone of safe operation of DOE nuclear facilities is personnel performing day-to-day functions which accomplish the facility mission. Performance-based training is fundamental to the safe operation. This manual has been developed to support the Training Accreditation Program (TAP) and assist contractors in efforts to develop performance-based training programs. It provides contractors with narrative procedures on performance-based training that can be modified and incorporated for facility-specific application. It is divided into sections dealing with analysis, design, development, implementation, and evaluation.

  6. Research on low carbon supply chain performance evaluation based on AHP and fuzzy comprehensive evaluation method%基于 AHP 模糊综合评价对低碳供应链绩效评价的研究

    Institute of Scientific and Technical Information of China (English)

    张慧; 孙秀梅

    2016-01-01

    低碳供应链已经成为国民经济发展的重要组成部分和主要趋势,借助平衡计分卡的思想提出供应链绩效评价的指标,并运用层次分析法构建低碳供应链绩效评价的指标体系。在此基础上,利用模糊综合评价方法构建绩效评价模型,结合低碳家电供应链对其进行验证。%Low carbon supply chain has become an important component of the national economic development and the main trend .With the balanced scorecard ideas ,this paper puts forward the supply chain performance evaluation indicators ,and builds a supply chain performance evaluation system based on AHP .On this basis ,we setablish the performance evaluation model using fuzzy comprehensive evaluation method ,and then verifies it by combining the low carbon electrical ap‐pliances supply chain .

  7. Evaluating iterative reconstruction performance in computed tomography

    International Nuclear Information System (INIS)

    Purpose: Iterative reconstruction (IR) offers notable advantages in computed tomography (CT). However, its performance characterization is complicated by its potentially nonlinear behavior, impacting performance in terms of specific tasks. This study aimed to evaluate the performance of IR with both task-specific and task-generic strategies. Methods: The performance of IR in CT was mathematically assessed with an observer model that predicted the detection accuracy in terms of the detectability index (d′). d′ was calculated based on the properties of the image noise and resolution, the observer, and the detection task. The characterizations of image noise and resolution were extended to accommodate the nonlinearity of IR. A library of tasks was mathematically modeled at a range of sizes (radius 1–4 mm), contrast levels (10–100 HU), and edge profiles (sharp and soft). Unique d′ values were calculated for each task with respect to five radiation exposure levels (volume CT dose index, CTDIvol: 3.4–64.8 mGy) and four reconstruction algorithms (filtered backprojection reconstruction, FBP; iterative reconstruction in imaging space, IRIS; and sinogram affirmed iterative reconstruction with strengths of 3 and 5, SAFIRE3 and SAFIRE5; all provided by Siemens Healthcare, Forchheim, Germany). The d′ values were translated into the areas under the receiver operating characteristic curve (AUC) to represent human observer performance. For each task and reconstruction algorithm, a threshold dose was derived as the minimum dose required to achieve a threshold AUC of 0.9. A task-specific dose reduction potential of IR was calculated as the difference between the threshold doses for IR and FBP. A task-generic comparison was further made between IR and FBP in terms of the percent of all tasks yielding an AUC higher than the threshold. Results: IR required less dose than FBP to achieve the threshold AUC. In general, SAFIRE5 showed the most significant dose reduction

  8. Evaluating iterative reconstruction performance in computed tomography

    Energy Technology Data Exchange (ETDEWEB)

    Chen, Baiyu, E-mail: chenby04@gmail.com; Solomon, Justin [Medical Physics Graduate Program, Duke University, Durham, North Carolina 27705 and Carl E. Ravin Advanced Imaging Laboratories, Duke University, Durham, North Carolina 27705 (United States); Ramirez Giraldo, Juan Carlos [Siemens Healthcare, Malvern, Pennsylvania 19355 (United States); Samei, Ehsan [Medical Physics Graduate Program, Duke University, Durham, North Carolina 27705 (United States); Carl E. Ravin Advanced Imaging Laboratories, Duke University, Durham, North Carolina 27705 (United States); Departments of Radiology, Physics, Biomedical Engineering, and Electronic and Computer Engineering, Duke University, Durham, North Carolina 27705 (United States)

    2014-12-15

    Purpose: Iterative reconstruction (IR) offers notable advantages in computed tomography (CT). However, its performance characterization is complicated by its potentially nonlinear behavior, impacting performance in terms of specific tasks. This study aimed to evaluate the performance of IR with both task-specific and task-generic strategies. Methods: The performance of IR in CT was mathematically assessed with an observer model that predicted the detection accuracy in terms of the detectability index (d′). d′ was calculated based on the properties of the image noise and resolution, the observer, and the detection task. The characterizations of image noise and resolution were extended to accommodate the nonlinearity of IR. A library of tasks was mathematically modeled at a range of sizes (radius 1–4 mm), contrast levels (10–100 HU), and edge profiles (sharp and soft). Unique d′ values were calculated for each task with respect to five radiation exposure levels (volume CT dose index, CTDI{sub vol}: 3.4–64.8 mGy) and four reconstruction algorithms (filtered backprojection reconstruction, FBP; iterative reconstruction in imaging space, IRIS; and sinogram affirmed iterative reconstruction with strengths of 3 and 5, SAFIRE3 and SAFIRE5; all provided by Siemens Healthcare, Forchheim, Germany). The d′ values were translated into the areas under the receiver operating characteristic curve (AUC) to represent human observer performance. For each task and reconstruction algorithm, a threshold dose was derived as the minimum dose required to achieve a threshold AUC of 0.9. A task-specific dose reduction potential of IR was calculated as the difference between the threshold doses for IR and FBP. A task-generic comparison was further made between IR and FBP in terms of the percent of all tasks yielding an AUC higher than the threshold. Results: IR required less dose than FBP to achieve the threshold AUC. In general, SAFIRE5 showed the most significant dose reduction

  9. Plant operator performance evaluation from the viewpoint of crew communications

    International Nuclear Information System (INIS)

    Elucidation of a plant operator's cognitive processes is required to improve the man-machine interface that supports operators' diagnoses and decisions. Experiments to clarify operators' cognitive processes have been performed in which operator performance under abnormal conditions was evaluated by protocol analyses and interviews using a plant dynamics simulator. The cognitive processes had been previously analyzed by using the information-processing model developed based on Rasmussen's idea. The authors have had the working hypothesis, based on the experimental observations, that crew communications can be divided into various types, and operator performance can be evaluated by analysis of crew communications. Differences in operator crew performance were evaluated in the present study

  10. Performance evaluation methods in the hotel industry

    OpenAIRE

    Nunes, C.; Machado, M.

    2014-01-01

    This paper aims to contribute to increasing knowledge of performance evaluation methods used by the hotel industry, analysing whether there is a link between hotel characteristics and evaluation methods used. To achieve this goal we conducted surveys and interviews with financial officers of 275 four and five star hotels located in Portugal. The results support the conclusion that there is a link between hotel characteristics and performance evaluation methods used.

  11. Model performance evaluation (validation and calibration) in model-based studies of therapeutic interventions for cardiovascular diseases : a review and suggested reporting framework.

    Science.gov (United States)

    Haji Ali Afzali, Hossein; Gray, Jodi; Karnon, Jonathan

    2013-04-01

    Decision analytic models play an increasingly important role in the economic evaluation of health technologies. Given uncertainties around the assumptions used to develop such models, several guidelines have been published to identify and assess 'best practice' in the model development process, including general modelling approach (e.g., time horizon), model structure, input data and model performance evaluation. This paper focuses on model performance evaluation. In the absence of a sufficient level of detail around model performance evaluation, concerns regarding the accuracy of model outputs, and hence the credibility of such models, are frequently raised. Following presentation of its components, a review of the application and reporting of model performance evaluation is presented. Taking cardiovascular disease as an illustrative example, the review investigates the use of face validity, internal validity, external validity, and cross model validity. As a part of the performance evaluation process, model calibration is also discussed and its use in applied studies investigated. The review found that the application and reporting of model performance evaluation across 81 studies of treatment for cardiovascular disease was variable. Cross-model validation was reported in 55 % of the reviewed studies, though the level of detail provided varied considerably. We found that very few studies documented other types of validity, and only 6 % of the reviewed articles reported a calibration process. Considering the above findings, we propose a comprehensive model performance evaluation framework (checklist), informed by a review of best-practice guidelines. This framework provides a basis for more accurate and consistent documentation of model performance evaluation. This will improve the peer review process and the comparability of modelling studies. Recognising the fundamental role of decision analytic models in informing public funding decisions, the proposed

  12. PERFORMANCE EVALUATION: LITERATURE REVIEW AND TIME EVOLUTION.

    Directory of Open Access Journals (Sweden)

    Pintea Mirela-Oana

    2012-07-01

    Full Text Available Performance evaluation of an economic entity requires approaching several criteria, such as industry and economic entity type, managerial and entrepreneurial strategy, competitive environment, human and material resources available, using a system of appropriate performance indicators for this purpose.The exigencies of communication occurred on the growing number of phenomena that marked the global economy in recent decades (internationalization and relocation of business crises and turmoil in financial markets, demand performance measurement to be made in a comprehensive way by financial and non-financial criteria. Indicators are measures of performance used by management to measure, report and improve performance of the economic entity. The relationship between indicators and management is ensured by the existence of performance measurement systems. Studies to date indicate that economic entities using balanced performance measurement systems as a key management tool registered superior performance compared to entities not using such systems. This study attempts to address the issue of performance evaluation by presenting opinions of different authors concerning the process of performance measurement and to present, after revising the literature, the evolution of the performance evaluation systems. We tried to do this literature review because sustainable development and, therefore, globalization require new standards of performance that exceeds the economic field, both for domestic companies as well as international ones. So, these standards should be integrated into corporate strategy development to ensure sustainability of activities undertaken by harmonizing the economic, social and environmental objectives. To assess the performance of economic entities it is required that performance evaluation to be done with a balanced multidimensional system, including both financial ratios and non-financial indicators in order to reduce the limits of

  13. Research on Evaluation Model of HEI Scientific and Technology Research Team Performance Evaluation Based on AHP and TOPSIS%基于AHP和TOPSIS的高校科研团队绩效评价研究

    Institute of Scientific and Technical Information of China (English)

    包含丽; 郑伟; 韦小青

    2012-01-01

    The paper established an evaluation index system of HEI scientific research team performance, and put forward evaluation model based on analytical hierarchy process ( AHP) and Technique for Order Preference by Similarity to Ideal Solution (TOPSIS) by similarity to an ideal solution ( TOPSIS) . Using AHP, the evaluation index was made. The posi-tive ideal solution, negative ideal solution and proximity were calculated. The rank of HEI scientific and technology re-search team performance evaluation was made by comparing the proximity. An example was analysis to validate the practica-bility and feasibility of the established index system and model. The results proved the evaluation index system could give a new kind of methods for HEI scientific research team performance evaluation.%建立了高技科研团队绩效评价指标体系,提出了基于层次分析法(AHP)和逼近理想求解的排序法(TOPSIS)的高校科研团队绩效评价模型,利用AHP确定评价指标的权重、TOPSIS排序法,计算正、负理想解和接近度;依据接近度对高校科研团队绩效评价指标进行比较,并进行了实例分析.分析结果表明:论文构建的科研团队评价指标体系具有一定的实用性,为高校科研团队绩效提供了一种评价依据.

  14. High-Performance Monopropellants and Catalysts Evaluated

    Science.gov (United States)

    Reed, Brian D.

    2004-01-01

    The NASA Glenn Research Center is sponsoring efforts to develop advanced monopropellant technology. The focus has been on monopropellant formulations composed of an aqueous solution of hydroxylammonium nitrate (HAN) and a fuel component. HAN-based monopropellants do not have a toxic vapor and do not need the extraordinary procedures for storage, handling, and disposal required of hydrazine (N2H4). Generically, HAN-based monopropellants are denser and have lower freezing points than N2H4. The performance of HAN-based monopropellants depends on the selection of fuel, the HAN-to-fuel ratio, and the amount of water in the formulation. HAN-based monopropellants are not seen as a replacement for N2H4 per se, but rather as a propulsion option in their own right. For example, HAN-based monopropellants would prove beneficial to the orbit insertion of small, power-limited satellites because of this propellant's high performance (reduced system mass), high density (reduced system volume), and low freezing point (elimination of tank and line heaters). Under a Glenn-contracted effort, Aerojet Redmond Rocket Center conducted testing to provide the foundation for the development of monopropellant thrusters with an I(sub sp) goal of 250 sec. A modular, workhorse reactor (representative of a 1-lbf thruster) was used to evaluate HAN formulations with catalyst materials. Stoichiometric, oxygen-rich, and fuelrich formulations of HAN-methanol and HAN-tris(aminoethyl)amine trinitrate were tested to investigate the effects of stoichiometry on combustion behavior. Aerojet found that fuelrich formulations degrade the catalyst and reactor faster than oxygen-rich and stoichiometric formulations do. A HAN-methanol formulation with a theoretical Isp of 269 sec (designated HAN269MEO) was selected as the baseline. With a combustion efficiency of at least 93 percent demonstrated for HAN-based monopropellants, HAN269MEO will meet the I(sub sp) 250 sec goal.

  15. Performance evaluation and comparison of fuel processors integrated with PEM fuel cell based on steam or autothermal reforming and on CO preferential oxidation or selective methanation

    International Nuclear Information System (INIS)

    Highlights: • Modeling of different fuel processors integrated with PEM fuel cell stack. • Steam or autothermal reforming + CO selective methanation or preferential oxidation. • Reforming of different hydrocarbons: gasoline, light diesel oil, natural gas. • 5 kWe net systems comparison via energy efficiency and primary fuel rate consumed. • Highest net efficiency: steam reformer + CO selective methanation based system. - Abstract: The performances of four different auxiliary power unit (APU) schemes, based on a 5 kWe net proton exchange membrane fuel cell (PEM-FC) stack, are evaluated and compared. The fuel processor section of each APU is characterized by a reformer (autothermal ATR or steam SR), a non-isothermal water gas shift (NI-WGS) reactor and a final syngas catalytic clean-up step: the CO preferential oxidation (PROX) reactor or the CO selective methanation (SMET) one. Furthermore, three hydrocarbon fuels, the most commonly found in service stations (gasoline, light diesel oil and natural gas) are considered as primary fuels. The comparison is carried out examining the results obtained by a series of steady-state system simulations in Aspen Plus® of the four different APU schemes by varying the fed fuel. From the calculated data, the performance of CO-PROX is not very different compared to that of the CO-SMET, but the performance of the SR based APUs is higher than the scheme of the ATR based APUs. The most promising APU scheme with respect to an overall performance target is the scheme fed with natural gas and characterized by a fuel processor chain consisting of SR, NI-WGS and CO-SMET reactors. This processing reactors scheme together with the fuel cell section, notwithstanding having practically the same energy efficiency of the scheme with SR, NI-WGS and CO-PROX reactors, ensures a less complex scheme, higher hydrogen concentration in the syngas, lower air mass rate consumption, the absence of nitrogen in the syngas and higher potential power

  16. Twenty-fifth water reactor safety information meeting: Proceedings. Volume 2: Human reliability analysis and human performance evaluation; Technical issues related to rulemakings; Risk-informed, performance-based initiatives; High burn-up fuel research

    International Nuclear Information System (INIS)

    This three-volume report contains papers presented at the conference. The papers are printed in the order of their presentation in each session and describe progress and results of programs in nuclear safety research conducted in this country and abroad. Foreign participation in the meeting included papers presented by researchers from France, Japan, Norway, and Russia. The titles of the papers and the names of the authors have been updated and may differ from those that appeared in the final program of the meeting. This volume contains the following: (1) human reliability analysis and human performance evaluation; (2) technical issues related to rulemakings; (3) risk-informed, performance-based initiatives; and (4) high burn-up fuel research

  17. Performance Evaluation of Frequent Subgraph Discovery Techniques

    Directory of Open Access Journals (Sweden)

    Saif Ur Rehman

    2014-01-01

    Full Text Available Due to rapid development of the Internet technology and new scientific advances, the number of applications that model the data as graphs increases, because graphs have highly expressive power to model a complicated structure. Graph mining is a well-explored area of research which is gaining popularity in the data mining community. A graph is a general model to represent data and has been used in many domains such as cheminformatics, web information management system, computer network, and bioinformatics, to name a few. In graph mining the frequent subgraph discovery is a challenging task. Frequent subgraph mining is concerned with discovery of those subgraphs from graph dataset which have frequent or multiple instances within the given graph dataset. In the literature a large number of frequent subgraph mining algorithms have been proposed; these included FSG, AGM, gSpan, CloseGraph, SPIN, Gaston, and Mofa. The objective of this research work is to perform quantitative comparison of the above listed techniques. The performances of these techniques have been evaluated through a number of experiments based on three different state-of-the-art graph datasets. This novel work will provide base for anyone who is working to design a new frequent subgraph discovery technique.

  18. Risk-based performance indicators

    International Nuclear Information System (INIS)

    This research was sponsored by the Nuclear Regulatory Commission (NRC) to develop methods for monitoring an aspect of safety performance of licensed nuclear power plants; i.e., unavailability of safety systems. Various options were evaluated for constructing system unavailability indicators using basic reliability principles and consistent with the content of data collected. The capabilities of each indicator option, in terms of detection probabilities and false alarm rates within a fixed response period for various types of anomalies, were evaluated through detailed simulation studies. Brookhaven National Laboratory performed two studies to evaluate the capability of NPRDS (Nuclear Plant Reliability Data System) as a data source for construction of system unavailability indicators. Specific indicators were developed consistent with the limited scope of NPRDS data. In order to generate system unavailability indicators in an efficient manner, the processes for NPRDS data acquisition, indicator construction, and analyses were automated using personal computer software. Limited pilot applications and verification were also performed

  19. 基于EVA视角下的报业集团绩效评价%Discussion on the Performance Evaluation of Press Group Based on EVA

    Institute of Scientific and Technical Information of China (English)

    张新星

    2015-01-01

    In recent years, China’s press industry is developing rapidly. At the same time of developing the traditional business, some press groups explore the cross-regional, cross-industrial, multi-faceted and multi-level development on the basis of their own resources. Their development level is being affected by mar⁃ket factors more and more obviously.But the traditional financial performance evaluation system based on the income, profit, net assets yield and others can not meet the needs of the modern press group ’s multi level gover⁃nance structure and diversification management . Taking the Economic Value Added (EVA) as the break⁃through point, this paper has done a preliminary discussion on the method and system of performance evaluation of press groups .%近年来,我国报业发展迅猛,一些报业集团在坚持发展传统主业的同时,依托自身资源优势进行了跨地区、跨行业、多方位、多层次的发展探索,其发展程度、发展水平受市场因素的影响也越来越明显。而传统的收入、利润、净资产收益率等财务绩效评价体系已满足不了现代报业集团多层级结构治理和多元化经营需要。本文以经济增加值(EVA)为切入点,对报业集团的绩效评价方法、体系进行了初步探讨。

  20. Conductor gestures influence evaluations of ensemble performance.

    Science.gov (United States)

    Morrison, Steven J; Price, Harry E; Smedley, Eric M; Meals, Cory D

    2014-01-01

    Previous research has found that listener evaluations of ensemble performances vary depending on the expressivity of the conductor's gestures, even when performances are otherwise identical. It was the purpose of the present study to test whether this effect of visual information was evident in the evaluation of specific aspects of ensemble performance: articulation and dynamics. We constructed a set of 32 music performances that combined auditory and visual information and were designed to feature a high degree of contrast along one of two target characteristics: articulation and dynamics. We paired each of four music excerpts recorded by a chamber ensemble in both a high- and low-contrast condition with video of four conductors demonstrating high- and low-contrast gesture specifically appropriate to either articulation or dynamics. Using one of two equivalent test forms, college music majors and non-majors (N = 285) viewed sixteen 30 s performances and evaluated the quality of the ensemble's articulation, dynamics, technique, and tempo along with overall expressivity. Results showed significantly higher evaluations for performances featuring high rather than low conducting expressivity regardless of the ensemble's performance quality. Evaluations for both articulation and dynamics were strongly and positively correlated with evaluations of overall ensemble expressivity. PMID:25104944

  1. Conductor gestures influence evaluations of ensemble performance

    Directory of Open Access Journals (Sweden)

    Steven eMorrison

    2014-07-01

    Full Text Available Previous research has found that listener evaluations of ensemble performances vary depending on the expressivity of the conductor’s gestures, even when performances are otherwise identical. It was the purpose of the present study to test whether this effect of visual information was evident in the evaluation of specific aspects of ensemble performance, articulation and dynamics. We constructed a set of 32 music performances that combined auditory and visual information and were designed to feature a high degree of contrast along one of two target characteristics: articulation and dynamics. We paired each of four music excerpts recorded by a chamber ensemble in both a high- and low-contrast condition with video of four conductors demonstrating high- and low-contrast gesture specifically appropriate to either articulation or dynamics. Using one of two equivalent test forms, college music majors and nonmajors (N = 285 viewed sixteen 30-second performances and evaluated the quality of the ensemble’s articulation, dynamics, technique and tempo along with overall expressivity. Results showed significantly higher evaluations for performances featuring high rather than low conducting expressivity regardless of the ensemble’s performance quality. Evaluations for both articulation and dynamics were strongly and positively correlated with evaluations of overall ensemble expressivity.

  2. Evaluation of Performance Indexes of Emergency Department

    Directory of Open Access Journals (Sweden)

    Alireza Baratloo

    2015-02-01

    Full Text Available Introduction: The importance of evaluating performance indicators in the emergency department, as one of the most important departments of hospital, is obvious to everyone. Therefore, in this study we aimed to appraise the five performance indicators, approved by the ministry of health, in Shohadaye Tajrish hospital, Tehran, Iran. Methods: In a descriptive cross-sectional study based on the profiles of all the patients admitted to the emergency department, performance indicators in the emergency department were evaluated. The study was divided into 2 parts about the establishment of emergency medicine system and training the medical staff: the first 6 months of 1392 and the second. Then these 2 periods were compared using Mann-Whitney U test while P< 0.05 was considered as the level of significance. Results: Of the studied indicators, mean triage time was 6.04 minutes in the first 6 months which was reduced to 1.5 minutes in the second 6 months (p=0.016. In addition, the percentage of patients who moved out of the department in 12 hours was lowered from 97.3% in the first period to 90.4% in the second (p=0.004. While, the percentage of patients who were decided upon in 6 hours (p=0.2, unsuccessful CPR percentage (p=0.34 and patients discharged against medical advice (p=0.42 showed no significant difference. Conclusion: The results of this study showed that the establishment of the emergency medicine system in the emergency department could lead to more efficient triage. Due to the differences made after their establishment including: different pattern of the patients admitted, increased stay of the patients in the department due to their need for prolonged intensive care, a raise in patient referral to the hospital by pre-hospital services and a higher percentage of occupied hospital beds, other indicators have not shown a significant improvement.

  3. ATAMM enhancement and multiprocessor performance evaluation

    Science.gov (United States)

    Stoughton, John W.; Mielke, Roland R.; Som, Sukhamoy; Obando, Rodrigo; Malekpour, Mahyar R.; Jones, Robert L., III; Mandala, Brij Mohan V.

    1991-01-01

    ATAMM (Algorithm To Architecture Mapping Model) enhancement and multiprocessor performance evaluation is discussed. The following topics are included: the ATAMM model; ATAMM enhancement; ADM (Advanced Development Model) implementation of ATAMM; and ATAMM support tools.

  4. Evaluating the Performance of High-Altitude Aerial Image-Based Digital Surface Models in Detecting Individual Tree Crowns in Mature Boreal Forests

    Directory of Open Access Journals (Sweden)

    Topi Tanhuanpää

    2016-07-01

    Full Text Available Height models based on high-altitude aerial images provide a low-cost means of generating detailed 3D models of the forest canopy. In this study, the performance of these height models in the detection of individual trees was evaluated in a commercially managed boreal forest. Airborne digital stereo imagery (DSI was captured from a flight altitude of 5 km with a ground sample distance of 50 cm and corresponds to regular national topographic airborne data capture programs operated in many countries. Tree tops were detected from smoothed canopy height models (CHM using watershed segmentation. The relative amount of detected trees varied between 26% and 140%, and the RMSE of plot-level arithmetic mean height between 2.2 m and 3.1 m. Both the dominant tree species and the filter used for smoothing affected the results. Even though the spatial resolution of DSI-based CHM was sufficient, detecting individual trees from the data proved to be demanding because of the shading effect of the dominant trees and the limited amount of data from lower canopy levels and near the ground.

  5. A VV&A evaluation system based on hierarchical evaluation

    Institute of Scientific and Technical Information of China (English)

    FANG Ke; YANG Ming; WANG Zi-cai

    2005-01-01

    Evaluation is the major activity of performing Verification, Validation and Accreditation (VV&A) of a simulation system. Unfortunately, there is a lack of reasonable and operable evaluation methods. Moreover,there are other problems to address in VV&A evaluation, such as index definition, conclusion analysis, etc. In this paper, a VV&A evaluation system is introduced to try to resolve these problems. The system is based on a method called hierarchical evaluation, and it uses a good combination of evaluation processes and indexes.First, a thorough analysis of the VV&A evaluation' s essentials and principles are given, then the uncertainty of the evaluation results caused by various analysis of the evaluators is pointed out, then a hierarchical evaluation mechanism based on evaluator weight and evaluation hierarchy is brought forward, and finally a comprehensive VV&A evaluation system with evaluation flow processing, index management and hierarchical evaluation fulfillment is established. The system gives good consideration to ease of operation, reasonableness of evaluation conclusion, and the ability to comprehensively resolve VV&A problems. Since VV&A is attracting more and more recognition, it is meaningful to provide a good system for implementing credible simulation systems. It is hoped that this VV&A evaluation will provide a good way.

  6. Performance evaluation methodology for historical document image binarization.

    Science.gov (United States)

    Ntirogiannis, Konstantinos; Gatos, Basilis; Pratikakis, Ioannis

    2013-02-01

    Document image binarization is of great importance in the document image analysis and recognition pipeline since it affects further stages of the recognition process. The evaluation of a binarization method aids in studying its algorithmic behavior, as well as verifying its effectiveness, by providing qualitative and quantitative indication of its performance. This paper addresses a pixel-based binarization evaluation methodology for historical handwritten/machine-printed document images. In the proposed evaluation scheme, the recall and precision evaluation measures are properly modified using a weighting scheme that diminishes any potential evaluation bias. Additional performance metrics of the proposed evaluation scheme consist of the percentage rates of broken and missed text, false alarms, background noise, character enlargement, and merging. Several experiments conducted in comparison with other pixel-based evaluation measures demonstrate the validity of the proposed evaluation scheme.

  7. Performance evaluation methodology for historical document image binarization.

    Science.gov (United States)

    Ntirogiannis, Konstantinos; Gatos, Basilis; Pratikakis, Ioannis

    2013-02-01

    Document image binarization is of great importance in the document image analysis and recognition pipeline since it affects further stages of the recognition process. The evaluation of a binarization method aids in studying its algorithmic behavior, as well as verifying its effectiveness, by providing qualitative and quantitative indication of its performance. This paper addresses a pixel-based binarization evaluation methodology for historical handwritten/machine-printed document images. In the proposed evaluation scheme, the recall and precision evaluation measures are properly modified using a weighting scheme that diminishes any potential evaluation bias. Additional performance metrics of the proposed evaluation scheme consist of the percentage rates of broken and missed text, false alarms, background noise, character enlargement, and merging. Several experiments conducted in comparison with other pixel-based evaluation measures demonstrate the validity of the proposed evaluation scheme. PMID:23008259

  8. Evaluation of high-performance computing software

    Energy Technology Data Exchange (ETDEWEB)

    Browne, S.; Dongarra, J. [Univ. of Tennessee, Knoxville, TN (United States); Rowan, T. [Oak Ridge National Lab., TN (United States)

    1996-12-31

    The absence of unbiased and up to date comparative evaluations of high-performance computing software complicates a user`s search for the appropriate software package. The National HPCC Software Exchange (NHSE) is attacking this problem using an approach that includes independent evaluations of software, incorporation of author and user feedback into the evaluations, and Web access to the evaluations. We are applying this approach to the Parallel Tools Library (PTLIB), a new software repository for parallel systems software and tools, and HPC-Netlib, a high performance branch of the Netlib mathematical software repository. Updating the evaluations with feed-back and making it available via the Web helps ensure accuracy and timeliness, and using independent reviewers produces unbiased comparative evaluations difficult to find elsewhere.

  9. 基于灰色聚类决策的图像分割性能评价%Performance evaluation based on grey clustering of segmentation

    Institute of Scientific and Technical Information of China (English)

    吴志川; 彭国华

    2012-01-01

    In view of the performance analyses of image segmentation, a hierarchical synthetic evaluation method is proposed based on the grey clustering. The method obtains the appropriate albinism function by target characteristic, then the scattered information produces cluster matrix. The new method can distinguish the performances from different segmentation algorithms easily. The experiments show that the method has higher sensitivity and lower singularity than other methods, and can be more effectively used to analyze the performance of segmentation algorithms.%针对图像分割的性能分析问题,运用灰色聚类决策技术建立一种多层次的综合评估方法.该方法通过图像多个分割指标的特点,得到合适的白化函数,再通过白化函数和灰色聚类权值的分析计算,将收集到的分散信息生成灰色聚类矩阵,以此对图像分割性能进行分类;其评估结果的离散性高,便于区分不同分割算法的性能.应用实例表明,该方法很好地克服了以往评估方法的不灵敏性和奇异性,从而使评判更容易进行.

  10. 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…

  11. Performance evaluation of PL-11 platelet analyzer

    Institute of Scientific and Technical Information of China (English)

    张有涛

    2013-01-01

    Objective To evaluate and report the performance of PL-11 platelet analyzer. Methods Intravenous blood sam-ples anticoagulated with EDTA-K2 and sodium citrate were tested by the PL-11 platelet analyzer to evaluate the intra-assay and interassay coefficient of variation(CV),

  12. Building Leadership Talent through Performance Evaluation

    Science.gov (United States)

    Clifford, Matthew

    2015-01-01

    Most states and districts scramble to provide professional development to support principals, but "principal evaluation" is often lost amid competing priorities. Evaluation is an important method for supporting principal growth, communicating performance expectations to principals, and improving leadership practice. It provides leaders…

  13. Subjective performance evaluations and employee careers

    DEFF Research Database (Denmark)

    Frederiksen, Anders; Lange, Fabian; Kriechell, Ben

    Firms commonly use supervisor evaluations to assess the performance of employees who work in complex environments. Doubts persist whether their subjective nature invalidates using these performance measures to learn about careers of individuals and to inform theory in personnel economics. We...

  14. Performance Evaluation of Yunnan Railway Based on DEA Method%基于DEA的云南铁路绩效研究

    Institute of Scientific and Technical Information of China (English)

    王琢; 赖应良

    2013-01-01

      随着当代经济的高速发展,作为资源大省的云南省,其经济增长很大程度上依靠长距离、大能力的铁路运输来实现,科学评价铁路的运营状况具有重要意义。基于DEA方法对云南铁路2002—2011年整个行业的统计数据进行收集整理,建立数学模型,进行绩效评价,并运用DEAP软件求解。结果认为,2002—2006年由于建设滞后,云南铁路运能严重不足从而成为制约经济发展的主要障碍之一,2007—2011年云南铁路的绩效在现有体制下已经无法再提高,规模效率也趋于稳定,要想在更高层次上提高铁路行业绩效,必须进一步推进改革。%With the rapid development of the contemporary economy,the economic growth of Yunnan Province depends on the long-distance,large-capacity rail transport. The railway operational status of the scientific evaluation has important significance. Statistics based on the DEA methods of the entire industry of Yunnan Railway 2002—2011 were collected to establish the mathematical model,to evaluate the performance,and to solve using DEAP software. From 2002 to 2006,Yunnan railway transport capacity was serious weakened,thus becoming one of the major obstacles that impede economic development. Yunnan Railway’s performance in 2007—2011 under the current system has been unable to further increase the efficiency of scale to stabilize at a higher level. In order to improve the performance of the railway industry,the reform must be further promoted.

  15. Image Evaluation For Sensor Performance Standards

    Science.gov (United States)

    Peck, Lorin C.

    1989-02-01

    The subject of imagery evaluation as it applies to electro-optical (EO) sensor performance testing standards is discussed. Some of the difficulties encountered in the development of these standards for the various aircraft Line Replaceable Units (LRUs) are listed. The use of system performance testing is regarded as a requirement for the depot maintenance program to insure the integrity of total system performance requirements for EO imaging systems such as the Advanced Tactical Air Reconnaissance System (ATARS). The necessity for tying NATO Essential Elements of Information (EEIs) together with Imagery Interpretation Rating Scale (IIRS) numbers is explained. The requirements for a field target suitable for EO imagery evaluation is explained.

  16. Multilingual Database Management System: A Performance Evaluation

    Directory of Open Access Journals (Sweden)

    Nurul H.M. Saad

    2011-01-01

    Full Text Available Problem statement: The use of English as well as Arabic language is increasingly evident in the aspects of international business and finance. This study explored the management of multilingual data in multilingual system, to cater two or more different speakers of Internet users. Approach: The proposed method divided into two ends: The front-end that consisted of the Client and the Translator components and the back-end where the management module and the database located. In this method, a single encoded table required to store information and corresponding dictionaries needed to store the multilingual data. The proposed method based on the framework presented in previous work with some modification to suit with characteristics of chosen languages. Results: Experimental evaluation was performed in storage requirement and mathematical analysis had been used to show the time of each database operations for both of the traditional and the proposed method. Conclusion/Recommendations: The proposed method found to be consistently performed well in the developed multilingual system.

  17. An improved multilevel fuzzy comprehensive evaluation algorithm for security performance

    Institute of Scientific and Technical Information of China (English)

    LI Ling-juan; SHEN Ling-tong

    2006-01-01

    It is of great importance to take various factors into account when evaluating the network security performance.Multilevel fuzzy comprehensive evaluation is a relatively valid method. However, the traditional multilevel fuzzy comprehensive evaluation algorithm relies on the expert's knowledge and experiences excessively, and the result of the evaluation is usually less accurate. In this article, an improved multilevel fuzzy comprehensive evaluation algorithm, based on fuzzy sets core and entropy weight is presented. Furthermore, a multilevel fuzzy comprehensive evaluation model of P2P network security performance has also been designed, and the improved algorithm is used to make an instant computation based on the model. The advantages of the improved algorithm can be embodied in comparison with the traditional evaluation algorithm.

  18. Performance evaluation of family businesses: the strategy of a distributor of veterinary products against its competitors in the focus of the "Resource-Based View"

    OpenAIRE

    Filardi, Fernando; Freitas, Angilberto; Pinto, Neusa; Silveira, Flavio

    2012-01-01

    From the Resource-Based View perspective, this study aimed to analyze as a Brazilian family owned distributor of veterinary products in the pet shop business has managed to achieve superior performance in its segment. Comparing to 21 competitors, and using criteria set by the Organization Manufacturer of Products for Veterinary Use (FMVET) to measure their performance, the company received the award for A + Featured in the year 2010. The methodology adopted an approach based on a qualitative ...

  19. Performance Evaluation of CRW Reef-Scale and Broad-Scale SST-Based Coral Monitoring Products in Fringing Reef Systems of Tobago

    Directory of Open Access Journals (Sweden)

    Shaazia S. Mohammed

    2015-12-01

    Full Text Available Satellite-derived sea surface temperature (SST is used to monitor coral bleaching through the National Oceanic and Atmospheric Administration’s Coral Reef Watch (CRW Decision Support System (DSS. Since 2000, a broad-scale 50 km SST was used to monitor thermal stress for coral reefs globally. However, some discrepancies were noted when applied to small-scale fringing coral reefs. To address this, CRW created a new DSS, specifically targeted at or near reef scales. Here, we evaluated the new reef-scale (5 km resolution products using in situ temperature data and coral bleaching surveys which were also compared with the heritage broad-scale (50 km for three reefs (Buccoo Reef, Culloden and Speyside of the southern Caribbean island of Tobago. Seasonal and annual biases indicated the new 5 km SST generally represents the conditions at these reefs more accurately and more consistently than the 50 km SST. Consistency between satellite and in situ temperature data influences the performance of anomaly-based predictions of bleaching: the 5 km DHW product showed better consistency with bleaching observations than the 50 km product. These results are the first to demonstrate the improvement of the 5 km products over the 50 km predecessors and support their use in monitoring thermal stress of reefs in the southern Caribbean.

  20. Effects of Performers' External Characteristics on Performance Evaluations.

    Science.gov (United States)

    Bermingham, Gudrun A.

    2000-01-01

    States that fairness has been a major concern in the field of music adjudication. Reviews the research literature to reveal information about three external characteristics (race, gender, and physical attractiveness) that may affect judges' performance evaluations and influence fairness of music adjudication. Includes references. (CMK)

  1. Research Performance Evaluation: Some Critical Thoughts on Standard Bibliometric Indicators

    Science.gov (United States)

    Anninos, Loukas N.

    2014-01-01

    The bibliometric methodology is an established technique for research evaluation as it offers an objective determination and comparison of research performance. This paper aims to critically assess some standard bibliometric indicators commonly used (based on publication and citation counts) to evaluate academic units, and examine whether there…

  2. The COBATEST network: a platform to perform monitoring and evaluation of HIV community-based testing practices in Europe and conduct operational research.

    Science.gov (United States)

    Fernàndez-López, L; Reyes-Urueña, J; Agustí, C; Kustec, T; Klavs, I; Casabona, C

    2016-01-01

    The European project "HIV community-based testing practices in Europe" (HIV-COBATEST) has contributed to the establishment of a network of community-based voluntary counselling and testing services (CBVCTs) that monitors and evaluates HIV testing activity in the communities. The objective of this paper is to describe the data that have been collected during 2014 by the COBATEST network in order to provide an insight into testing activity of CBVCTs in Europe. Members of the CBVCT network share common instruments for data collection and data entry. The network has a common database that allows global data analysis and comparison between different centres. In 2014, 40 CBVCTs of 18 European countries were participating in the network, and, from those, 20 CBVCTs were using the common COBATEST data collection tools. In these 20 CBVCTs, a total of 9266 HIV screening tests were performed on 8554 people, of which 1.58% (135/8554) were reactive and 51.1% (69/135) confirmed positive. Five cases were false positives, and 84.1% (58/69) of the confirmed positive cases were linked to care. Most of the tested individuals were men (70.8%), between 21 and 35 years of age (57.6%) and natives (67.1%). A higher proportion of men who had sex with men (MSM) (38.8%; 3267/8554) were tested compared to heterosexual men (27.7%) and women (23.5%). Rapid blood test was used in 78.5% of the cases and mostly performed in CBVCT offices (88.3%). Among sex workers (SWs), the percentage of reactive screening tests was particularly high (4.0%), especially among male SWs (7.7%) as compared to other risk groups, such as MSM (3.1%). The COBATEST network contributes to the availability of standardized information about the activity and impact of CBVCT centres in Europe. This information and standardized tools can help improve these services and inform decision-makers to better contextualize these interventions within their national HIV-prevention programmes. PMID:26883807

  3. The Evaluation of the Effect of Processing Parameters on Adhesion Performance of Polyether based TPU over mold on to Polycarbonate Substrate

    Science.gov (United States)

    Patankar, Mukund Purushottam

    The overmolding process involves the use of two separate materials to form one cohesive component. The final product is a single piece, made out of polymers with very different mechanical properties that must be safe and permanently bonded together throughout its useful life. The first shot is generally a hard plastic and is referred to as a substrate the second material is generally a soft thermoplastic elostomer (TPE) and referred as overmold. The rigid substrate is used for structural purposes, and the softer materials are expected to take care of the user comfort. Overmolding can add immeasurable value to product design by enhancing the comforts for user, ergonomics, and ease of use. It finds applications in household appliances, hand tools, automotive interiors, hand held computers and medical devices. The most common problems with overmolding are insufficient chemical or mechanical bonding of the polymers, incomplete filling of one or more components, and flashing of overmold. This paper deals with adhesion issues and describes the study performed to evaluate the effect of processing parameters on adhesion performance of Polyether based TPU over mold on to Polycarbonate Substrate. The study established the effect of various processing parameters on the adhesion of overmold to substrate. In addition effect of various surface roughness of substrate on adhesion was also determined. Study also describes the criteria used to design specimen and the specimen tool was build. The specimens were molded using design of experiments. The specimens were tested using Inston universal testing machine by establishing the test procedure and test set up to yield consistent results. The force at which constant peel occurred, called peel force was determined for all experiments. The study concludes that melt temperature is the most dominating factor and the specimen molded with lower melt temperature results in good bond. Light roughness on the substrate surface further enhances

  4. Methods of Evaluating Performances for Marketing Strategies

    OpenAIRE

    Ioan Cucu

    2005-01-01

    There are specific methods for assessing and improving the effectiveness of a marketing strategy. A marketer should state in the marketing plan what a marketing strategy is supposed to accomplish. These statements should set forth performance standards, which usually are stated in terms of profits, sales, or costs. Actual performance must be measured in similar terms so that comparisons are possible. This paper describes sales analysis and cost analysis, two general ways of evaluating the act...

  5. Smith Newton Vehicle Performance Evaluation - Cumulative (Brochure)

    Energy Technology Data Exchange (ETDEWEB)

    2014-08-01

    The Fleet Test and Evaluation Team at the U.S. Department of Energy's National Renewable Energy Laboratory is evaluating and documenting the performance of electric and plug-in hybrid electric drive systems in medium-duty trucks across the nation. U.S. companies participating in this evaluation project received funding from the American Recovery and Reinvestment Act to cover part of the cost of purchasing these vehicles. Through this project, Smith Electric Vehicles is building and deploying 500 all-electric medium-duty trucks that will be deployed by a variety of companies in diverse climates across the country.

  6. Reinvigorating performance evaluation: first steps in a local health department.

    Science.gov (United States)

    Smith, Kathleen N; Gunzenhauser, Jeffrey D; Fielding, Jonathan E

    2010-01-01

    The ability of a local health department to assess and improve employee performance through an effective evaluation process is critical to overall organizational success. A constructive performance evaluation process not only provides meaningful feedback on work performance but also provides opportunities to reinforce work behaviors that support the organization's mission, to recognize exceptional work, and to guide future growth and learning. The Los Angeles County Department of Public Health is creating a new approach to performance evaluation that recognizes 3 distinct components of work performance: standard business practices, competencies, and standards of practice. This multidimensional perspective acknowledges that the expectations of workers are complex and that evaluations of performance are not easily captured with single-dimension assessment tools. This report describes the conceptual relationships of these 3 components and how they integrate to form a single performance evaluation process. Key elements within this structure include a base document of competencies for all workers, expanded competency sets for professional staff, role-specific duty statements for workers who perform similar work, and standards of competent practice related to the mission of units to which individuals are assigned. Key first steps are to define the terminology of performance evaluation and to create role-specific duty statements.

  7. Guide to performance-based fire protection

    CERN Document Server

    Society of Fire Protection Engineers

    2011-01-01

    Performance‐Based design and evaluation require a thorough knowledge of computer modeling and the latest engineering techniques. Use processes devised by the field’s leading authorities to define project scope and identify goals, specify stakeholder and design objectives, develop performance criteria, create fire scenarios and trial designs and evaluate designs. Appendices provide real‐life examples, easy‐to‐follow guidelines on the use of statistical data, detailed advice on risk and uncertainty analyses, plus expert tips about selecting models. The Guide is a “must” for engineers, AHJs, architects, building owners, fire officials and anyone who applies or approves performance‐based codes with this unique guide.

  8. Multilingual Database Management System: A Performance Evaluation

    Directory of Open Access Journals (Sweden)

    Nurul H.M. Saad

    2011-01-01

    Full Text Available Problem statement: The use of English as well as Arabic language is increasingly evident in the aspects of international business and finance. Therefore, this study explored the management of multilingual data in multilingual system in order to be able to cater two or more different speakers of Internet users. Approach: The proposed method is divided into two ends: The front-end that consisted of the Client and the Translator components and the back-end where the Management Module and the Database are located. In this method, a single encoded table is needed to store information and corresponding dictionaries are needed to store the multilingual data. The proposed method is based on the framework proposed in previous work with some modification to suit with the characteristics of the chosen languages on the case study. Results: Experimental evaluation had been done in storage requirement and mathematical analysis had been used to show the time of each of database operations for both of the traditional and the proposed method. Conclusion/Recommendations: The proposed method had been found to be consistently performed in the developed multilingual system.

  9. Performance Evaluation and Simulation of Pressurized Gasification

    Directory of Open Access Journals (Sweden)

    C. Mohanraj

    2012-08-01

    Full Text Available The emergence of biomass based energy warrants the evaluation of syn-gas from biomass gasification as a fuel for power systems. The earlier investigations reveal that the operating parameters strongly affect the syn gas quality. The gasifier performance was investigated with different operating pressure. The downdraft gasifier has tested with silver oak woodchips of size approximately 12mm×12mm×12mm. The total feed of 8-8.5kg of wood was fed into the system and an airflow rate of 130 lpm supplied by compressor and the gasifier was tested different pressure conditions. The main variables namely oxidation zone temperature, combustible gas contents (H2, CO & CH4, calorific value, gas production rate and conversion efficiency was studied. The percentage of total combustible gas is varied between 30.60% - 35.97% and the average composition is N2 = 44.29% – 54.78%, CH4 = 0.62% – 1.51%, H2 = 15.7% – 25.48%, CO = 7.96% – 11.4%, CO2 = 11.37% – 19.70%. The calorific value of syn gas was found to vary between 3.860 MJ/m3 – 4.374.94 MJ/m3. The conversion efficiency varied between 86.8% - 73.7%.Computational fluid dynamics (CFD method was used to predict the performance of the down draft biomass gasifier. For simulation purpose the combustion zone of the gasifier was separately modeled and analyzed.

  10. EVALUATION OF TYPES OF STRESS COPING MECHANISMS OF INDIVIDUALS PARTICIPATING IN PSYCHOLOGICAL PERFORMANCE CONSULTANCY TRAINING ON FOOTBALL BASED ON VARIOUS PARAMETERS

    OpenAIRE

    Meriç; Mustafa Yaşar; Ümit

    2016-01-01

    This study attempts to analyze the individualways of coping with stress based on various variables. The study group is comprised of people who attended Training for Psychological Performance Counselling in Football held by the Turkish Football Federation. There were 114 participants in total. The “Ways of Coping Scale”, developed by Folkman and Lazarus (1980) and revised and recreated by Şahin and Durak (1995), was employed in this study. Statistical analyses of the data were performed throug...

  11. Evaluation of the Service Performance of Ships

    DEFF Research Database (Denmark)

    Andersen, Poul; Borrod, Anne-Sophie; Blanchot, Hervé

    2005-01-01

    A simple method has been established for the evaluation of the service performance of ships. Input data are easily collected daily on board and transformed to a well-defined condition that makes possible the comparison between ships, for instance, sister ships, and between different time periods...

  12. Performance evaluation of an air solar collector

    Science.gov (United States)

    1979-01-01

    Indoor tests on signal-glazed flat-plate collector are described in report. Marhsall Space Flight Center solar simulator is used to make tests. Test included evaluations on thermal performance under various combinations of flow rate, incident flux, inlet temperature, and wind speed. Results are presented in graph/table form.

  13. Subjective performance evaluation and gender discrimination

    NARCIS (Netherlands)

    V.S. Maas; R. Torres-Gonzalez

    2011-01-01

    Gender discrimination continues to be a problem in organizations. It is therefore important that organizations use performance evaluation methods that ensure equal opportunities for men and women. This article reports the results of an experiment to investigate whether and, if so, how the gender of

  14. Evaluation of port logistics performance based on fuzzy comprehensive analysis%基于模糊综合分析的港口物流绩效评价

    Institute of Scientific and Technical Information of China (English)

    张丽凤; 占鹏飞

    2013-01-01

    As the economic globalization develops deeply , the trades among countries become more frequent , which makes the port logistics activities be in an increasingly important role in the economic development , and the evaluation of the port logistics activities performance is a kind of effective means to enhance the competitiveness in port logistics activities.How to analyse and evaluate the port logistics operation performance scientifically and com -prehensively has become the topic part to be solved in the logistics activities .This paper constructs index system of the port logistics performance comprehensive evaluation , and then applies the synthetic vague mathematical analy-sis method to evaluate and analyse quantitatively the performance of the port logistics activities .The paper about Jinzhou port logistics activities is an empirical analysis , and the results can really reflect the port logistics activities situation.%  对港口物流绩效进行评价是提升港口物流竞争力的一种有效手段,如何科学、全面地分析和评判港口物流的运营绩效,已成为港口物流迫切需要解决的课题。论文构建了一个港口物流绩效综合评价指标体系,运用模糊综合数学分析方法对港口物流的绩效进行了量化评判与分析。通过对锦州港口物流绩效进行的实证分析表明,该指标体系能够比较真实的反映其港口的物流状况。

  15. 海运物流企业绩效研究%Performance Evaluation of the Maritime Logistics Enterprise based on DEA

    Institute of Scientific and Technical Information of China (English)

    宋成; 袁海燕

    2015-01-01

    为科学准确的评价我国海运物流企业的绩效水平,选取13家上市的海运物流企业,采用因子分析的方法对相关数据进行简化,从海运物流企业的偿债能力、经营发展能力、盈利能力、资本结构、未来发展方面构建海运物流企业绩效评价指标体系,运用数据包络分析方法对这些企业绩效情况进行实证分析,建立了投入产出的DEA模型,以此得出海运物流企业管理绩效评价值和前沿面图,结合评价结果和企业实际运营情况证实了这种方法对海运物流企业绩效研究有较好的应用价值.%In order to evaluate the maritime logistics enterprise performance in china scientifically and accurately,this paper selects 13 listed maritime logistics enterprises,simplifies the published financial data by the factor analysis method and builds the maritime logistics enterprises performance evaluation index system from the solvency of maritime logistics enterprises, the development capabilities, the profitability, the capital structure and the future developments. It analyzes the maritime logistics enterprises performance using the data envelopment analysis method,gives the input-output DEA model,draws the maritime logistics enterprise management performance evaluation results. Finally,the practicalities are proved by the comprehensive evaluation results and the actual operating conditions.

  16. Theory-Based Stakeholder Evaluation

    Science.gov (United States)

    Hansen, Morten Balle; Vedung, Evert

    2010-01-01

    This article introduces a new approach to program theory evaluation called theory-based stakeholder evaluation or the TSE model for short. Most theory-based approaches are program theory driven and some are stakeholder oriented as well. Practically, all of the latter fuse the program perceptions of the various stakeholder groups into one unitary…

  17. Evaluation of a Document Oriented Resource Directory Performance

    Directory of Open Access Journals (Sweden)

    N. Gligorić

    2012-11-01

    Full Text Available In this paper, two implementations of a Resource Directory based on document oriented databases are described. Resource Directory is a directory storing descriptions of resources available in an Internet of Things system. Their performances are compared with performance of a Resource Directory with the same functionality, but implemented using a relational, SQL database. The evaluation results show that the document based Resource Directories provide more flexible management of the resources and a shorter response time.

  18. A study on relationship between operating cash flows and performance evaluation criteria based on the theory of constraints (TOC) versus traditional method

    OpenAIRE

    Mohammad Sadegh Arabi Ashtiani

    2013-01-01

    This study presents an empirical investigation to measure the relationship between traditional accounting performance measurement as well as theory of constraint-based figures with operating cash flow. Traditional accounting measurement includes net profit and return of investment and theory of constraint method includes net profit and return of investment based on theory of constraints. The study selects 69 firms list on Tehran Stock Exchange over the period 2000-2010. Using panel data and f...

  19. The FY 1998 Battelle performance evaluation and incentive fee agreement

    Energy Technology Data Exchange (ETDEWEB)

    Davis, T.L.

    1998-01-07

    Fiscal Year 1998 represents the second full year utilizing a results-oriented, performance-based contract. This document describes the critical outcomes, objectives, performance indicators, expected levels of performance, and the basis for the evaluation of the Contractors performance for the period October 1, 1997 through September 30, 1998, as required by Articles entitled Use of Objective Standards of Performance, Self Assessment and Performance Evaluation and Critical Outcomes Review of the Contract DE-AC06-76RL01830. In partnership with the Contractor and other key customers, the Department of Energy (DOE) Richland Operations Office has defined six critical outcomes that serve as the core for the Contractors performance evaluation. The Contractor also utilizes these outcomes as a basis for overall management of the Laboratory. The Critical Outcome system focuses all of the customer desires into specific objectives and performance indicators, with supporting measures to track and foster continued improvement in meeting the needs (outcomes) of the Laboratory`s customers. Section 1 provides information on how the overall performance rating for the Contractor will be determined. Section 2 provides the detailed information concerning critical outcomes, objectives, performance indicators and expectations of performance. Section 3 describes the commitments for documenting and reporting the Laboratory`s self-evaluation.

  20. New Energy Power Generation Performance Evaluation Research were Reviewed--Based on Multi-index Evaluation Method%新能源发电绩效评价研究综述--基于多指标评价方法

    Institute of Scientific and Technical Information of China (English)

    章玲; 方建鑫; 周鹏

    2014-01-01

    Based on the popularity of Multi-criteria decision making method applied in the new-energy performance evalua-tion field, this paper made a literature review from evaluation criteria, criteria weight and evaluation method aspects respectively. On the evaluation criteria aspect, this paper summarized the common used evaluation criteria from technical, economic, envir-onmental and social four aspects. On the criteria weight aspect, this paper made an analysis from subjective weight, objective weight and mixed weight three aspects. On the evaluation method, this paper analyzed the common used AHP, TOPSIS and PROMETHEE method etc. Besides, this paper pointed out the deficiencies in the existing studies and the further research directions.%基于多指标决策方法在新能源发电绩效评价领域应用的广泛性,本文分别从评价指标、指标权重及评价方法三个方面对现有新能源发电绩效评价相关文献作了回顾与总结。在评价指标上,分别从技术、经济、环境和社会方面总结了常用的新能源发电绩效评价指标;在指标权重上,分别从主观权重、客观权重和混合权重三个方面对权重设置进行了分析;在评价方法上,分别对 AHP、 TOPSIS 和 PROMETHEE 等方法在新能源发电绩效评价中的应用进行了分析。同时,本文还指出了现有新能源发电绩效评价研究的不足及可进一步拓展的研究方向。

  1. 基于PDCA的供应链视角下物流客户服务绩效评价研究%Performance Evaluation Logistics Customer Service from Supply Chain Perspective Based on PDCA Cycle

    Institute of Scientific and Technical Information of China (English)

    汪利虹; 刘志学

    2012-01-01

    在系统总结国内外相关文献的基础上,设计了基于PDCA循环的供应链视角下物流客户服务绩效评价流程,并针对每个流程给出了控制重点,旨在通过对绩效评价流程的规范管理,不断提高物流客户服务绩效和供应链整体绩效水平.在绩效评价方案设计环节提出了给予供应链整体绩效提升的物流客户服务绩效评价方法和指标体系,在绩效评价方案实施环节给出了应用模糊层次分析法选择物流服务商的步骤.%Based on classic PDCA cycle control theory, we study process management of logistics customer service performance evaluation from supply chain perspective. On the basis of systematic review of related literature at home and abroad, we propose a process of logistics customer service performance evaluation from supply chain perspective based on PDCA cycle, and in the light of each process control key points are given for the improvement of standard management of performance evaluation process and the performance level of logistics customer service and supply chain. In the performance evaluation scheme design, we put forward logistics customer service performance evaluation method and index system to improve the overall performance of the supply chain. And in the performance evaluation scheme we lay out implementation method of logistics customer services of the chosen procedure based on fuzzy analytic hierarchy process.

  2. 基于BSC的企业中层管理者绩效考评研究%BSC- Based Performance Evaluation of Middle Managers in Enterprise

    Institute of Scientific and Technical Information of China (English)

    饶蓝

    2011-01-01

    企业中层管理者绩效考评中存在中层管理者的绩效目标与企业目标不一致;间接绩效过多;难以把握绩效考评的重点;中层管理者之间常常相互推卸绩效责任等问题。借助平衡记分卡(BSC)的管理思想可有效解决这一系列问题,具体实施方法如下:按BSC框架分解中层管理者的绩效目标;把握中层管理者的关键绩效指标;中层管理者绩效责任的认定。%Middle manager' s performance objectives are inconsistent with business goals. There are too many indirect performance, and difficult to grasp the focus of performance evaluation. Among middle managers, they often shirk their responsibilities with each other. With the Balanced Scorecard (BSC) management ideas can be an effective solution to the problem of this series. Specific implementation methods are as follows : such as decomposing the middle manager' s performance goals by BSC framework; grasping the middle manager' s key performance indicators; and identify the middle manager's performance accountability as well.

  3. Web-based Projects Evaluation Management System

    Directory of Open Access Journals (Sweden)

    S. Al-Zoubi

    2008-01-01

    Full Text Available This project designs a Web-based evaluation management system for the College of Arts and Sciences (CAS. Problem statement: The Msc students in College of Arts and Sciences (CAS in applied sciences had to take their final project as a project paper in order to fulfill the requirements of their programs and be able to graduate. The final project was evaluated in two parts; first part is representing 40% of the total mark and evaluated by evaluators. Second part was representing 60% of the total mark and evaluated by the student's supervisor. These evaluation were done manually. Both the evaluators and supervisors had to fill in the evaluation forms manually and submit them to the office. Approach: The design research methodology or sometimes called "improvement research" contained the major steps: Awareness the problem, suggestion, development, evaluation and conclusion. Results: Both evaluators and supervisors can fill in the evaluation forms through the Internet. Bring the advantage of saving time and resources over traditional paper and pencil scan sheet method. For enhancing the performance of current final project evaluation process in College of Arts and Sciences (CAS this study proposed a web based evaluation management system to replace the current paper forms used by the evaluators and supervisors. Conclusion: Implementing this system will enable the evaluation results to be entered, presume and retrieved anytime anywhere.

  4. Cage-based performance capture

    CERN Document Server

    Savoye, Yann

    2014-01-01

    Nowadays, highly-detailed animations of live-actor performances are increasingly easier to acquire and 3D Video has reached considerable attentions in visual media production. In this book, we address the problem of extracting or acquiring and then reusing non-rigid parametrization for video-based animations. At first sight, a crucial challenge is to reproduce plausible boneless deformations while preserving global and local captured properties of dynamic surfaces with a limited number of controllable, flexible and reusable parameters. To solve this challenge, we directly rely on a skin-detached dimension reduction thanks to the well-known cage-based paradigm. First, we achieve Scalable Inverse Cage-based Modeling by transposing the inverse kinematics paradigm on surfaces. Thus, we introduce a cage inversion process with user-specified screen-space constraints. Secondly, we convert non-rigid animated surfaces into a sequence of optimal cage parameters via Cage-based Animation Conversion. Building upon this re...

  5. Behavioral patterns of environmental performance evaluation programs.

    Science.gov (United States)

    Li, Wanxin; Mauerhofer, Volker

    2016-11-01

    During the past decades numerous environmental performance evaluation programs have been developed and implemented on different geographic scales. This paper develops a taxonomy of environmental management behavioral patterns in order to provide a practical comparison tool for environmental performance evaluation programs. Ten such programs purposively selected are mapped against the identified four behavioral patterns in the form of diagnosis, negotiation, learning, and socialization and learning. Overall, we found that schemes which serve to diagnose environmental abnormalities are mainly externally imposed and have been developed as a result of technical debates concerning data sources, methodology and ranking criteria. Learning oriented scheme is featured by processes through which free exchange of ideas, mutual and adaptive learning can occur. Scheme developed by higher authority for influencing behaviors of lower levels of government has been adopted by the evaluated to signal their excellent environmental performance. The socializing and learning classified evaluation schemes have incorporated dialogue, participation, and capacity building in program design. In conclusion we consider the 'fitness for purpose' of the various schemes, the merits of our analytical model and the future possibilities of fostering capacity building in the realm of wicked environmental challenges.

  6. Behavioral patterns of environmental performance evaluation programs.

    Science.gov (United States)

    Li, Wanxin; Mauerhofer, Volker

    2016-11-01

    During the past decades numerous environmental performance evaluation programs have been developed and implemented on different geographic scales. This paper develops a taxonomy of environmental management behavioral patterns in order to provide a practical comparison tool for environmental performance evaluation programs. Ten such programs purposively selected are mapped against the identified four behavioral patterns in the form of diagnosis, negotiation, learning, and socialization and learning. Overall, we found that schemes which serve to diagnose environmental abnormalities are mainly externally imposed and have been developed as a result of technical debates concerning data sources, methodology and ranking criteria. Learning oriented scheme is featured by processes through which free exchange of ideas, mutual and adaptive learning can occur. Scheme developed by higher authority for influencing behaviors of lower levels of government has been adopted by the evaluated to signal their excellent environmental performance. The socializing and learning classified evaluation schemes have incorporated dialogue, participation, and capacity building in program design. In conclusion we consider the 'fitness for purpose' of the various schemes, the merits of our analytical model and the future possibilities of fostering capacity building in the realm of wicked environmental challenges. PMID:27513220

  7. Semi-quantitative study to evaluate the performance of a HACCP-based food safety management system in Japanese milk processing plants

    NARCIS (Netherlands)

    Sampers, I.; Toyofuku, H.; Luning, P.A.; Uyttendaele, M.; Jacxsens, L.

    2012-01-01

    This study aimed to gain an insight in the performance of Hazard Analysis and Critical Control Points (HACCP)-based food safety management systems (FSMS) implemented in Japanese milk processing plants. Since 1995, Japan has a comprehensive approval system for food manufacturing establishments by eva

  8. A study on relationship between operating cash flows and performance evaluation criteria based on the theory of constraints (TOC versus traditional method

    Directory of Open Access Journals (Sweden)

    Mohammad Sadegh Arabi Ashtiani

    2013-08-01

    Full Text Available This study presents an empirical investigation to measure the relationship between traditional accounting performance measurement as well as theory of constraint-based figures with operating cash flow. Traditional accounting measurement includes net profit and return of investment and theory of constraint method includes net profit and return of investment based on theory of constraints. The study selects 69 firms list on Tehran Stock Exchange over the period 2000-2010. Using panel data and fixed effect, the study performs regression analysis and the results confirm that there was a positive relationship between net profit measured by theory of constraints and cash flow and it can be effectively used for performance measurement.

  9. Performance Evaluation of an Axysimmetric Floating OWC

    DEFF Research Database (Denmark)

    Alves, M. A.; Costa, I. R.; Sarmento, A. J.;

    2010-01-01

    -diffraction panel model based on the classic linear water wave theory and potential flow. To proceed with the wave energy converter (WEC) evaluation the equations of motion (of each body), in the frequency domain, are expressed as functions of the complex amplitude of the displacements, which can be determined from...

  10. Performance evaluation software moving object detection and tracking in videos

    CERN Document Server

    Karasulu, Bahadir

    2013-01-01

    Performance Evaluation Software: Moving Object Detection and Tracking in Videos introduces a software approach for the real-time evaluation and performance comparison of the methods specializing in moving object detection and/or tracking (D&T) in video processing. Digital video content analysis is an important item for multimedia content-based indexing (MCBI), content-based video retrieval (CBVR) and visual surveillance systems. There are some frequently-used generic algorithms for video object D&T in the literature, such as Background Subtraction (BS), Continuously Adaptive Mean-shift (CMS),

  11. Performance management in the Slovak higher education system: preliminary evaluation

    Directory of Open Access Journals (Sweden)

    Juraj Nemec

    2007-10-01

    Full Text Available The aim of our paper is a preliminary evaluation of the introduction of performance management and performance financing arrangements in the Slovak higher education system – accreditation and formula based performance financing. This evaluation will be mainly based on the assessment of short-term impacts of the above mentioned instruments and is expected to invite further professional discussion. We feel that the data and brief analysis included are sufficient enough to show that the Slovak system represents a typical example of the potential of performance management and performance financing being significantly limited, if not destroyed. Not only because of improperly defined indicators, which are too much input and quantity orientated, but very much also due to a lack of resources (the ratio of public expenditures for higher education to the GDP in Slovakia is significantly below EU average, as well as the politicization of the system.

  12. Model Performance Evaluation and Scenario Analysis (MPESA) Tutorial

    Science.gov (United States)

    This tool consists of two parts: model performance evaluation and scenario analysis (MPESA). The model performance evaluation consists of two components: model performance evaluation metrics and model diagnostics. These metrics provides modelers with statistical goodness-of-fit m...

  13. Communication processes, public administration and performance evaluation

    OpenAIRE

    Arta Musaraj

    2011-01-01

    Albanian efforts to fulfill European standards and norm in its Public Administration and service delivery, are becoming a research argument for academics and practitioners as well. Even if significant efforts have been made in this direction there is still a gap in analyzing the link between the communication process which creates and delivers the public service, effect of the used tools in service provision and delivery, the performance evaluation of this sector and the future of the sector ...

  14. Port operating performance evaluation based on EVA comprehensive scorecard%基于EVA综合计分卡的港口经营业绩评价

    Institute of Scientific and Technical Information of China (English)

    张昕伟; 谢新连

    2011-01-01

    为对我国港口经营业绩进行较为全面的评价,将经济增加值评价方法与平衡计分卡方法相结合,构造EVA综合计分卡评价方法.运用层次分析法对各指标构造两两判断比较矩阵,计算权重向量,并进行实例分析.EVA综合计分卡使港口评价兼顾财务指标与非财务指标,体现港口企业的长期发展能力,可真实反映港口经营状况,为企业决策者提供决策支持.%EVA comprehensive score card evaluation system was constructed combing the evaluation and economic value added method with balanced scorecard method to give a more comprehensive evaluation to our port operating performance.Each index of analytic hierarchy process opposite comparative matrix was constructed,and weight vector was calculated,and example calculation was carried out.It is indicated that EVA comprehensive score card evaluation system considers both financial index and non-financial indicators,and embodies the long-term development ability of the port enterprises,which can really reflect port operation situation,and provide decision support for enterprise decision makers.

  15. Fiscal year 1999 Battelle performance evaluation and fee agreement

    Energy Technology Data Exchange (ETDEWEB)

    DAVIS, T.L.

    1998-10-22

    Fiscal Year 1999 represents the third fill year utilizing a results-oriented, performance-based evaluation for the Contractor's operations and management of the DOE Pacific Northwest National Laboratory (here after referred to as the Laboratory). However, this is the first year that the Contractor's fee is totally performance-based utilizing the same Critical Outcomes. This document describes the critical outcomes, objectives, performance indicators, expected levels of performance, and the basis for the evaluation of the Contractor's performance for the period October 1, 1998 through September 30, 1999, as required by Clauses entitled ''Use of Objective Standards of Performance, Self Assessment and Performance Evaluation'' and ''Performance Measures Review'' of the Contract DE-ACO6-76RL01830. Furthermore, it documents the distribution of the total available performance-based fee and the methodology set for determining the amount of fee earned by the Contractor as stipulated within the causes entitled ''Estimated Cost and Annual Fee,'' ''Total Available Fee'' and ''Allowable Costs and Fee.'' In partnership with the Contractor and other key customers, the Department of Energy (DOE) Headquarters (HQ) and Richland Operations Office (RL) has defined four critical outcomes that serve as the core for the Contractor's performance-based evaluation and fee determination. The Contractor also utilizes these outcomes as a basis for overall management of the Laboratory.

  16. Building performance based on measured data

    OpenAIRE

    Andersson, Staffan; Sjögren, Jan-Ulric; Östin, Ronny; Olofsson, Thomas

    2011-01-01

    With increasing liability for builders, the need for evaluation methods that focuses on the building’s performance and thus excludes the impact from residents’ behavior increases. This is not only of interest for new buildings but also when retrofitting existing buildings in order to reduce energy end-use. The investigation in this paper is based on extensive measurements on two fairly representative type of buildings, a single family building in Ekerö, Stockholm built 2000 and two apartment ...

  17. A Practical Frame-Work for the Performance Evaluation of Classical Frequency Planning Schemes in OFDM Based on Markov’s Model

    Directory of Open Access Journals (Sweden)

    G. Santhosh Kumar

    2014-01-01

    Full Text Available In this paper, we propose a frame-work for the performance evaluation of frequency allocation schemes in 3G LTE OFDMA systems. We first develop an analytical model for collisions in an OFDMA system for an arbitrary number of users in the different cells. We then calculate the capacity of the system using a Markov model and taking into account the inter-cell interference and its impact on the adaptive modulation. We finally apply this model to compare three frequency allocation schemes, namely reuse 1, reuse 3, and a mix of reuse 1 and 3. Our results show that a mix of reuse 1 and 3 schemes outperforms a reuse 1 scheme in terms of better cell-edge performance, and outperforms also a reuse 3 scheme by achieving an higher cell throughput.

  18. Performance Evaluation of Wavelet Based on Human Visual System%基于人的视觉系统的小波性能评价

    Institute of Scientific and Technical Information of China (English)

    胡海平; 莫玉龙

    2002-01-01

    We have constructed a compactly supported biorthogonal wavelet that approximates the modulation transfer function (MTF) of human visual system in the frequency domain. In this paper, we evaluate performance of the constructed wavelet, and compare it with the widely used Daubechies 9-7, Daubechies 9-3 and GBCW-9-7 wavelets. The result shows that coding performance of the constructed wavelet is better than Daubechies 9-3, and is competitive with Daubechies 9-7 and GBCW-9-7 wavelets. Like Daubechies 9-3wavelet, the filter coefficients of the constructed wavelet are all dyadic fractions, and the tap is less than Daubechies 9-7 and GBCW9-7. It has an attractive feature in the realization of discrete wavelet transform.

  19. Performance Evaluation of Wave Energy Converters

    DEFF Research Database (Denmark)

    Pecher, Arthur

    stages, and results thereby in a need for specific test objectives and procedures for each development stage. This PhD thesis has looked into the different development stages and more specifically in the performance assessment of wave energy converters based on tank testing and sea trials. The objective...

  20. Performance Evaluation of Wave Energy Converters

    DEFF Research Database (Denmark)

    Pecher, Arthur

    stages, and results thereby in a need for specific testobjectives and procedures for each development stage. This PhD thesis has looked into the different development stages and more specifically in the performance assessment of wave energy converters based on tank testing and sea trials. The objective...

  1. Performance evaluation of titanium dioxide based dye-sensitized solar cells under the influence of anodization steps, nanotube length and ionic liquid-free redox electrolyte solvents

    Science.gov (United States)

    Cheong, Y. L.; Beh, K. P.; Yam, F. K.; Hassan, Z.

    2016-06-01

    In this work, highly ordered titanium dioxide (TiO2) nanotube (NT) arrays were synthesized on titanium foil using electrochemical anodization method. The morphological aspects of the nanotubes based on different anodization duration and number of anodization steps (maximum two) have been investigated. The nanotube arrays subsequently used as photoanode in a dye-sensitized solar cell (DSSC) assembly. The studies on the effects of different solvents for triiodide/iodide redox electrolyte and NT length towards the performance of DSSC were conducted. It is known that electrolyte solvent can significantly affect the photovoltaic conversion efficiency. It is noteworthy that longer NT length tends to yield higher efficiency due to better dye adsorption. However, when the NTs exceeded certain length the efficiency decreases instead. Meanwhile, a comparison of DSSC performance based on number of anodization steps on titanium was performed. Highly ordered NT arrays could be obtained using two-steps anodization, which proved to have positive effects on the DSSC performance. The highest photovoltaic conversion efficiency in this work is 2.04%, achieved by two-step anodization. The corresponding average nanotubes length was ˜18 μm, with acetonitrile (ACN) as the redox electrolyte solvent.

  2. Operator performance evaluation using multi criteria decision making methods

    Science.gov (United States)

    Rani, Ruzanita Mat; Ismail, Wan Rosmanira; Razali, Siti Fatihah

    2014-06-01

    Operator performance evaluation is a very important operation in labor-intensive manufacturing industry because the company's productivity depends on the performance of its operators. The aims of operator performance evaluation are to give feedback to operators on their performance, to increase company's productivity and to identify strengths and weaknesses of each operator. In this paper, six multi criteria decision making methods; Analytical Hierarchy Process (AHP), fuzzy AHP (FAHP), ELECTRE, PROMETHEE II, Technique for Order of Preference by Similarity to Ideal Solution (TOPSIS) and VlseKriterijumska Optimizacija I Kompromisno Resenje (VIKOR) are used to evaluate the operators' performance and to rank the operators. The performance evaluation is based on six main criteria; competency, experience and skill, teamwork and time punctuality, personal characteristics, capability and outcome. The study was conducted at one of the SME food manufacturing companies in Selangor. From the study, it is found that AHP and FAHP yielded the "outcome" criteria as the most important criteria. The results of operator performance evaluation showed that the same operator is ranked the first using all six methods.

  3. 基于PCA的生产企业物流绩效评价%PCA-Based Performance Evaluation of Material Flow in Manufacturing Enterprise

    Institute of Scientific and Technical Information of China (English)

    方永美; 刘伟章; 杨振刚; 陆翠萍

    2011-01-01

    目前我国在物流绩效评价方面的研究大多数集中在第三方物流、供应链物流方面,而生产企业物流方面的研究比较少.拟对生产企业的物流绩效评价进行研究,构建一套符合生产企业物流的绩效评价体系,运用PCA方法对企业内部的物流进行绩效评价,有助于企业降低生产成本,提高服务质量.%There is a large body of research reports on third party logistics and supply chain for inter-enterprises. However, less research attention is paid for material flow in a manufacturing enterprise. The performance evaluation of material flow in an enterprise is addressed in this paper and an evaluation system is developed. It adopts Principal Components Analysis (PCA) to assess the performance. The system is helpful for enterprises to reduce production cost and improve service quality.

  4. Performance improvement of software component with partial evaluation

    Institute of Scientific and Technical Information of China (English)

    MAO Hong-yan; HUANG Lin-peng; LI Ming-lu

    2008-01-01

    To avoid the complexity and inefficiency for specific applications of the current software architecture, a novel approach using partial evaluation is proposed to improve the running performance of components. The generic program was specialized into domain-specific realization for the known knowledge and environments. The syntax and semantic(adj.) were analyzed based on byte code instruction sequences, and partial evaluation rules depicted how to perform the specialization. The partial evaluation for object-oriented programs was imple-mented. The experimental results show that partial evaluation is effective to speed up the running efficiency. The more generality and scalability can be obtained by the integration of partial evaluation with the favorable de-sign mechanisms and compiler optimization technology.

  5. 基于多目标模糊综合评价的高层经理业绩考核方法%Performance Evaluation Method of Senior Managers Based on Multi Objective Fuzzy Comprehensive Evaluation

    Institute of Scientific and Technical Information of China (English)

    陈斌; 杨明

    2016-01-01

    评价高层管理管理人员的业绩水平是上市公司股票期权激励计划取得成功的重要环节,借助多目标模糊综合评价方法能够对此给出一个比较客观的评价结果。%The performance level evaluation of senior management personnel is an important part for quoted companies to make stock option incentive plan successful. With the help of multi objective fuzzy comprehensive evaluation method, a more objective evaluation result can be achieved.

  6. Research on the Performance Evaluation System of Higher Vocational College Counselors Based on Competency%基于胜任力的高职院校辅导员绩效评价体系研究

    Institute of Scientific and Technical Information of China (English)

    汪海伟

    2014-01-01

    研究基于胜任力模型的高职院校辅导员绩效评价体系对健全辅导员管理和考核有着重要的意义,有助于辅导员队伍的专业化、职业化建设。笔者从介绍胜任力和绩效的关系出发,分析了基于胜任力的高职院校辅导员绩效评价的优势,进一步探索了基于胜任力模型的辅导员绩效评价体系的构建。%To research the higher vocational college counselor performance evaluation system based on competency model is of great significance for improving the counselor management and assessment. It is conductive to the professionalization construction of the counselor team. The author introduces the relation between competency and performance evaluation, analyzes the advantage of higher vocational college counselor performance evaluation based on competency, and further explores the construction of counselor performance evaluation system based on competency model.

  7. Evaluation on materials performance of Hastelloy Alloy XR for HTTR uses-6. Tensile and creep properties of heat exchanger tube base materials and its welded-joints

    International Nuclear Information System (INIS)

    Tensile and creep properties of heat exchanger tube base materials and its welded-joints were investigated as a series of evaluation tests on Hastelloy Alloy XR heat exchanger tube and filler metal for the High Temperature Engineering Test Reactor (HTTR) components. As for tensile properties after thermal aging of base materials and welded joints, ductility was remarkably reduced at room temperature while it was raised at 950degC. On creep properties, the difference between base materials and welded joints in creep rupture strength was relatively small. Creep rupture elongation tended to decrease with increasing rupture time, and rupture elongation of welded joint had a tendency to be lower than that of base material. On the other hand, a comparison of plate with tube on high temperature tensile ductility after thermal aging was found to be higher in tube than in plate while its difference was slight at room temperature. As for creep properties, base materials and welded joints of tube had a tendency to be slightly shorter in rupture time at lower stress and long terms than those of plate. However, it is concluded that this is not problematic in practical uses from the fact that the rupture time in tube is comparable or greater than that of Hastelloy Alloy XR master curve and that it is much longer than that of design creep rupture strength =SR=. (author)

  8. Performance indicators for the statistical evaluation of digital image classifications

    NARCIS (Netherlands)

    D'Urso, G.; Menenti, M.

    1996-01-01

    A statistical procedure is proposed to evaluate the algorithms for the numerical classification of images. The approach is based on the derivation of performance indicators from measurements of signature separability and thresholding analysis. Although these measurements are not new in image process

  9. Performance and Dependability Evaluation: Successes, Failures and Challenges

    NARCIS (Netherlands)

    Haverkort, Boudewijn R.

    2008-01-01

    Over the last 40 years, the field of model-based performance and dependability evaluation has seen important developments, successes and scientific breakthroughs. However, the field has not matured into a key engineering discipline which is heavily called upon by computer system and software enginee

  10. Evaluation of hotel service-performance process in Bulgaria

    OpenAIRE

    Georgina Lukanova

    2010-01-01

    The paper analyses the hotel service-performance process in Bulgarian hotels, which is based on the results of the research about tourists’ opinion on basic moments in service process. One of the most important characteristics of hotel industry is the leading role of the human factor in service-performance process. It cannot be accomplished without the participation of the customer and without the participation of the staff. This makes the evaluation of service process strongly subjective. Be...

  11. Injection performance evaluation for storage ring of SSRF

    CERN Document Server

    Yang, Yong; Yan, Ying-Bing; Chen, Zhi-Chu

    2014-01-01

    Injection performance of storage ring is one of the important factors for the light efficiency and quality of Synchrotron Radiation Facility when it is in top-up mode. To evaluate the injection performance of storage ring at SSRF, we build a bunch-by-bunch position measuring system based on oscilloscope IOC. Accurate assessment of energy mismatching, distribution of residual oscillation and angle error of injection kickers can be achieved by this system.

  12. Evaluation of the use of performance reference compounds in an oasis-HLB adsorbent based passive sampler for improving water concentration estimates of polar herbicides in freshwater

    Science.gov (United States)

    Mazzella, N.; Lissalde, S.; Moreira, S.; Delmas, F.; Mazellier, P.; Huckins, J.N.

    2010-01-01

    Passive samplers such as the Polar Organic Chemical Integrative Sampler (POCIS) are useful tools for monitoring trace levels of polar organic chemicals in aquatic environments. The use of performance reference compounds (PRC) spiked into the POCIS adsorbent for in situ calibration may improve the semiquantitative nature of water concentration estimates based on this type of sampler. In this work, deuterium labeled atrazine-desisopropyl (DIA-d5) was chosen as PRC because of its relatively high fugacity from Oasis HLB (the POCIS adsorbent used) and our earlier evidence of its isotropic exchange. In situ calibration of POCIS spiked with DIA-d5was performed, and the resulting time-weighted average concentration estimates were compared with similar values from an automatic sampler equipped with Oasis HLB cartridges. Before PRC correction, water concentration estimates based on POCIS data sampling ratesfrom a laboratory calibration exposure were systematically lower than the reference concentrations obtained with the automatic sampler. Use of the DIA-d5 PRC data to correct POCIS sampling rates narrowed differences between corresponding values derived from the two methods. Application of PRCs for in situ calibration seems promising for improving POCIS-derived concentration estimates of polar pesticides. However, careful attention must be paid to the minimization of matrix effects when the quantification is performed by HPLC-ESI-MS/MS. ?? 2010 American Chemical Society.

  13. Based on improved fuzzy Borda method study on the performance evaluation model of enterprise knowledge management%基于改进模糊Borda法的企业知识管理绩效评价模型研究

    Institute of Scientific and Technical Information of China (English)

    尹淋雨; 程刚

    2013-01-01

    Through researching the current performance evaluation model of enterprise knowledge management, this paper proposes to use improved fuzzy Borda method to portfolio assessment existing single evaluation model. In addition, this paper provides a combination evaluation model which bases on improved fuzzy Borda method, and further to give the steps of using improved fuzzy Borda method performance evaluation model to evaluate the performance of enterprise knowledge management. It has practical significance for performance evaluation of enterprise knowledge management .%通过对目前企业知识管理绩效评价模型的研究,提出了采用改进的模糊Borda法对现有单一的评价模型进行组合评价。构建了基于改进模糊Borda法的组合评价模型,给出了改进模糊Borda法评价模型进行企业知识管理绩效评价的具体步骤,对企业知识管理绩效评价具有现实意义。

  14. FY 1997 performance evaluation and incentive fee agreement. Annual report

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1997-04-01

    FY 1997 represents the second full year utilizing a results-oriented, performance-based contract. This document describes the critical outcomes, objectives, performance indicators, expected levels of performance, and the basis for the evaluation of PNNL performance for Oct. 1, 1996-Sept. 30, 1997, as required by Articles H-24 and H-25 of the contract. Section I provides the information regarding the determination of the overall performance rating for PNNL. In Section II, six critical outcomes were defined that serve as basis for overall management of PNNL: environmental molecular sciences laboratory, environmental technology, scientific excellence, environment/safety & health operations, leadership/management, and economic development (create new businesses). Section III describes the commitments for documenting and reporting PNNL self-evaluation. In Section IV, it is stated that discussions regarding FY97 fee are still ongoing.

  15. Performance Modeling and Evaluation for Information-Driven Networks

    CERN Document Server

    Wu, Kui; Hu, Guoqiang

    2008-01-01

    Information-driven networks include a large category of networking systems, where network nodes are aware of information delivered and thus can not only forward data packets but may also perform information processing. In many situations, the quality of service (QoS) in information-driven networks is provisioned with the redundancy in information. Traditional performance models generally adopt evaluation measures suitable for packet-oriented service guarantee, such as packet delay, throughput, and packet loss rate. These performance measures, however, do not align well with the actual need of information-driven networks. New performance measures and models for information-driven networks, despite their importance, have been mainly blank, largely because information processing is clearly application dependent and cannot be easily captured within a generic framework. To fill the vacancy, we present a new performance evaluation framework particularly tailored for information-driven networks, based on the recent ...

  16. Comparative Evaluation of Software Features and Performances.

    Science.gov (United States)

    Cecconi, Daniela

    2016-01-01

    Analysis of two-dimensional gel images is a crucial step for the determination of changes in the protein expression, but at present, it still represents one of the bottlenecks in 2-DE studies. Over the years, different commercial and academic software packages have been developed for the analysis of 2-DE images. Each of these shows different advantageous characteristics in terms of quality of analysis. In this chapter, the characteristics of the different commercial software packages are compared in order to evaluate their main features and performances.

  17. Performance evaluation of TCP over ABT protocols

    Science.gov (United States)

    Ata, Shingo; Murata, Masayuki; Miyahara, Hideo

    1998-10-01

    ABT is promising for effectively transferring a highly bursty data traffic in ATM networks. Most of past studies focused on the data transfer capability of ABT within the ATM layer. In actual, however, we need to consider the upper layer transport protocol since the transport layer protocol also supports a network congestion control mechanism. One such example is TCP, which is now widely used in the Internet. In this paper, we evaluate the performance of TCP over ABT protocols. Simulation results show that the retransmission mechanism of ABT can effectively overlay the TCP congestion control mechanism so that TCP operates in a stable fashion and works well only as an error recovery mechanism.

  18. PERFORMANCE EVALUATION OF WASTE WATER TREATMENT PLANT

    Directory of Open Access Journals (Sweden)

    K. SUNDARA KUMAR

    2010-12-01

    Full Text Available The present study has been undertaken to evaluate performance efficiency of a waste water treatment plant. A sewage treatment plant operating on biological treatment method (Activated Sludge Process with an average wastewater inflow of 23MLD bas been considered for case study. Waste water samples were collected at different stages of treatment units and analysed for the major water quality parameters, such as biological oxygen demand (BOD, chemical oxygen demand (COD, total suspended solids (TSS and total dissolved solids (TDS. Theperformance efficiency of each unit in treating the pollutants was calculated. Overall performance of the plant also has been estimated. The obtained results were very much useful in identification and rectification of operational and maintenance problems as well as the future expansion to be carried out in the plant to meet the increased hydraulic and organic loadings.

  19. Irradiation and performance evaluation of DUPIC fuel

    Energy Technology Data Exchange (ETDEWEB)

    Bae, Ki Kwang; Yang, M. S.; Song, K. C. [and others

    2000-05-01

    The objectives of the project is to establish the performance evaluation system for the experimental verification of DUPIC fuel. The scope and content for successful accomplishment of the phase 1 objectives is established as follows : irradiation test of DUPIC fuel at HANARO using a noninstrument capsule, study on the characteristics of DUPIC pellets, development of the analysis technology on the thermal behaviour of DUPIC fuel, basic design of a instrument capsule. The R and D results of the phase 1 are summarized as follows : - Performance analysis technology development of DUPIC fuel by model development for DUPIC fuel, review on the extendability of code(FEMAXI-IV, FRAPCON-3, ELESTRESS). - Study on physical properties of DUPIC fuel by design and fabrication of the equipment for measuring the thermal property. - HANARO irradiation test of simulated DUPIC fuel by the noninstrument capsule development. - PIE and result analysis.

  20. Performance Evaluation of MANET Routing Protocols

    Directory of Open Access Journals (Sweden)

    Hrituparna Paul

    2012-07-01

    Full Text Available The task of finding and sustaining routes in Mobile Ad-hoc Networks (MANETS is an important factor in determining the efficiency of any MANET protocol. MANET characteristically is an autonomous system of mobile nodes connected by wireless links without any centralised infrastructure. Absence of fixed infrastructures and host mobility thus network may experience rapid and unpredictable topology changes. Hence, routing is required in order to perform communication among the entire network. There are several routing protocols namely proactive, reactive and hybrid etc. In this paper we will discuss the active research work on these routing protocols and its performance evaluation. To this end, we adopt a simulation approach, which is more suitable to this kind of analysis

  1. Irradiated Fuel Performance Evaluation Technology Development

    International Nuclear Information System (INIS)

    Performance evaluation system was established to investigate the irradiation characteristics of dual-cooled annular fuel. A new program which has a function of calculating fuel temperature and heat split of dual-cooled annular fuel is developed, and modules for calculating the distribution of thermal stress and deformation are presented. The reference code for transient performance has been analyzed in the aspects of the structure and model characteristics. The annealing tests were performed to evaluate the behaviors of the high burnup pellet and the large-grain pellet under transient conditions. A new post-irradiation annealing apparatus, which make a ultra-high temperature test possible, was established by substituting a new heating module an old heating one. Creep and embrittlement behaviors were also tested using newly established equipment in a hot cell. RIA(Reactivity Initiated Accident) and LOCA(Loss of Coolant Accident) test results were acquired and analyzed through international collaboration research with CABRI project in France and Halden reactor project in Norway. The second irradiation test is being performed with a burn-up target of 70 MWd/kgU for large-grain fuel pellets. Test fuel rods were fabricated for Fuel Test Loop and a steady state irradiation test is under way. The test rig were designed and fabricated for the irradiation of dual-cooled fuel rod, and then out-of reactor tests and safety analysis were conducted for the licensing of irradiation test. The dual-cooled fuel rods were irradiated to about 10 MWd/kgU in Hanaro reactor, and the post irradiation examination is going on. The profile of gamma scan shows that the annular pellet is stable in position during irradiation

  2. Evaluating cryostat performance for naval applications

    Science.gov (United States)

    Knoll, David; Willen, Dag; Fesmire, James; Johnson, Wesley; Smith, Jonathan; Meneghelli, Barry; Demko, Jonathan; George, Daniel; Fowler, Brian; Huber, Patti

    2012-06-01

    The Navy intends to use High Temperature Superconducting Degaussing (HTSDG) coil systems on future Navy platforms. The Navy Metalworking Center (NMC) is leading a team that is addressing cryostat configuration and manufacturing issues associated with fabricating long lengths of flexible, vacuum-jacketed cryostats that meet Navy shipboard performance requirements. The project includes provisions to evaluate the reliability performance, as well as proofing of fabrication techniques. Navy cryostat performance specifications include less than 1 Wm-1 heat loss, 2 MPa working pressure, and a 25-year vacuum life. Cryostat multilayer insulation (MLI) systems developed on the project have been validated using a standardized cryogenic test facility and implemented on 5-meterlong test samples. Performance data from these test samples, which were characterized using both LN2 boiloff and flow-through measurement techniques, will be presented. NMC is working with an Integrated Project Team consisting of Naval Sea Systems Command, Naval Surface Warfare Center-Carderock Division, Southwire Company, nkt cables, Oak Ridge National Laboratory (ORNL), ASRC Aerospace, and NASA Kennedy Space Center (NASA-KSC) to complete these efforts. Approved for public release; distribution is unlimited. This material is submitted with the understanding that right of reproduction for governmental purposes is reserved for the Office of Naval Research, Arlington, Virginia 22203-1995.

  3. Performance Evaluation of LDA, CCA and AAM

    Directory of Open Access Journals (Sweden)

    M. Jasmine Pemeena Priyadarsini

    2015-03-01

    Full Text Available Wouldn't we love to replace passwords access control to avoid theft, forgotten passwords? Wouldn't we like to enter the security areas just in seconds? Yes the answer is face recognition. In this study we explore and compare the performance of three algorithms namely LDA, CCA, AAM. LDA (an evolution of PCA is a dimensionality reduction technique where it solves the problem of illumination to some extent, maximizing the inter class separation and minimizing the intra class variations. CCA, a measure of linear relationship between two multidimensional variables where it takes the advantage of PCA and LDA for maximizing the correlation and better performance. AAM is a model based approach where it just picks the landmarks of the images for recognition therefore reducing the error rate and producing good performance rate.

  4. Hatchery Evaluation Report / Lyons Ferry Hatchery - Fall Chinook : An Independent Audit Based on Integrated Hatchery Operations Teams (IHOT) Performance Measures : Final Report.

    Energy Technology Data Exchange (ETDEWEB)

    Watson, Montgomery

    1996-05-01

    This report presents the findings of the independent audit of the Lyons Ferry Hatchery (Fall Chinook). The audit is being conducted as a requirement of the Northwest Power Planning Council (NPPC) ``Strategy for Salmon`` and the Columbia River Basin Fish and Wildlife Program. Under the audit, the hatcheries are evaluated against policies and related performance measures developed by the Integrated Hatchery Operations Team (IHOT). IHOT is a multi-agency group established by the NPPC to direct the development of new basinwide standards for managing and operating fish hatcheries. The audit was conducted in April 1996 as part of a two-year effort that will include 67 hatcheries and satellite facilities located on the Columbia and Snake River system in Idaho, Oregon, and Washington. The hatchery operating agencies include the US Fish and Wildlife Service, Idaho Department of Fish and Game, Oregon Department of Fish and Wildlife, and Washington Department of Fish and Wildlife.

  5. 13 CFR 306.7 - Performance evaluations of University Centers.

    Science.gov (United States)

    2010-01-01

    ... 13 Business Credit and Assistance 1 2010-01-01 2010-01-01 false Performance evaluations of... Development Program § 306.7 Performance evaluations of University Centers. (a) EDA will: (1) Evaluate each... evaluation period. (b) The performance evaluation will determine in part whether a University Center...

  6. 48 CFR 436.201 - Evaluation of contractor performance.

    Science.gov (United States)

    2010-10-01

    ... Construction 436.201 Evaluation of contractor performance. Preparation of performance evaluation reports. In addition to the requirements of FAR 36.201, performance evaluation reports shall be prepared for indefinite... of services to be ordered exceeds $500,000.00. For these contracts, performance evaluation...

  7. 40 CFR 35.9055 - Evaluation of recipient performance.

    Science.gov (United States)

    2010-07-01

    ... 40 Protection of Environment 1 2010-07-01 2010-07-01 false Evaluation of recipient performance. 35... Evaluation of recipient performance. The Regional Administrator will oversee each recipient's performance... schedule for evaluation in the assistance agreement and will evaluate recipient performance and...

  8. Evaluation method for the drying performance of enzyme containing formulations

    DEFF Research Database (Denmark)

    Sloth, Jakob; Bach, P.; Jensen, Anker Degn;

    2008-01-01

    A method is presented for fast and cheap evaluation of the performance of enzyme containing formulations in terms of preserving the highest enzyme activity during spray drying. The method is based on modeling the kinetics of the thermal inactivation reaction which occurs during the drying process...... for a number of different formulations it may be deduced which formulation performs best. This is illustrated by a formulation design study where 4 different enzyme containing formulations are evaluated. The method is validated by comparison to pilot scale spray dryer experiments....

  9. Exergy-Economic Criteria for Evaluating Heat Exchanger Performance

    Institute of Scientific and Technical Information of China (English)

    Wu Shuangying; Li Yourong

    2001-01-01

    Based on the exergy-economic analysis of heat exchanger heat transfer and flow process, two new exergyeconomic criteria which are defined as the total costs per unit heat transfer rate ηt t for heat transfer exchanger and the net profit per unit heat recovery rate ηr for heat recovery exchanger respectively are put forward.Furthermore, the application of criteria is illustrated by the evaluation of down-flow, counter-flow and cross-flow heat exchangers performance. The methods employed and results presented in this paper can serve as a guide for the performance evaluation of heat exchangers.

  10. Performance evaluation of vitrified waste product based on barium-borosilicate matrix deployed for vitrification of sulphate bearing high level radioactive liquid waste

    International Nuclear Information System (INIS)

    Aqueous waste of various categories (viz., low, intermediate and high level depending on the concentration of radionuclides) is generated at different stages of the nuclear fuel cycle. Most of the radioactivity generated in entire nuclear fuel cycle is concentrated in high level radioactive liquid waste (HLW). Since the radioactivity of the waste is to be isolated from the human-environment for extended period of time, a three stage approach has been adopted for management of HLW. This involves (i) immobilization of waste oxides in stable and inert solid matrices, (ii) interim retrievable storage of conditioned waste packages under cooling and surveillance and (iii) deep underground disposal in suitable geological formulations. Composition of HLW depends on various factors like type of fuel and its cladding, off reactor cooling, reprocessing flow sheet etc. Compositional changes in HLW necessitate modification in glass formulations, so as to get the conditioned product of desired characteristics. This report describes the experimental studies and results obtained for performance evaluation of the vitrified waste product made from barium borosilicate glass matrix accommodating sulphate bearing chemically simulated HLW. Product characteristics like chemical durability, homogeneity, phase separation, thermal conductivity, impact strength etc have been evaluated and discussed in the report. (author)

  11. Quasi-Fermi level splitting evaluation based on electroluminescence analysis in multiple quantum-well solar cells for investigating cell performance under concentrated light

    Science.gov (United States)

    Inoue, Tomoyuki; Toprasertpong, Kasidit; Delamarre, Amaury; Watanabe, Kentaroh; Paire, Myriam; Lombez, Laurent; Guillemoles, Jean-François; Sugiyama, Masakazu; Nakano, Yoshiaki

    2016-03-01

    Insertion of InGaAs/GaAsP strain-balanced multiple quantum wells (MQWs) into i-regions of GaAs p-i-n solar cells show several advantages against GaAs bulk p-i-n solar cells. Particularly under high-concentration sunlight condition, enhancement of the open-circuit voltage with increasing concentration ratio in thin-barrier MQW cells has been reported to be more apparent than that in GaAs bulk cells. However, investigation of the MQW cell mechanisms in terms of I-V characteristics under high-concentration sunlight suffers from the increase in cell temperature and series resistance. In order to investigate the mechanism of the steep enhancement of open-circuit voltage in MQW cells under high-concentration sunlight without affected by temperature, the quasi-Fermi level splitting was evaluated by analyzing electroluminescence (EL) from a cell. Since a cell under current injection with a density Jinjhas similar excess carrier density to a cell under concentrated sunlight with an equivalent short-circuit current Jsc = Jinj, EL measurement with varied Jinj can approximately evaluate a cell performance under a variety of concentration ratio. In addition to the evaluation of quasi-Fermi level splitting, the external luminescence efficiency was also investigated with the EL measurement. The MQW cells showed higher external luminescence efficiency than the GaAs reference cells especially under high-concentration condition. The results suggest that since the MQW region can trap and confine carriers, the localized excess carriers inside the cells make radiative recombination more dominant.

  12. A simplified methd of evaluating the seismic performance of buildings

    Institute of Scientific and Technical Information of China (English)

    Ashutosh Bagchi

    2004-01-01

    This paper presents a simplified method of evaluating the seismic performance of buildings. The proposed method is based on the transformation of a multiple degree of freedom (MDOF) system to an equivalent single degree of freedom (SDOF) system using a simple and intuitive process. The proposed method is intended for evaluating the seismic pertormance of the buildings at the intermediate stages in design, while a rigorous method would be applied to the final design. The performance of the method is evaluated using a series of buildings which are assumed to be located in Victoria in western Canada, and designed based on the upcoming version of the National Building Code of Canada which is due to bc published in 2005. To resist lateral loads, some of these buildings contain reinforced concrete moment resisting frames,while others contain reinforced concrete shear walls. Each building model has been subjected to a set of site-specific seismic spectrum compatible ground motion records, and the response has been determined using the proposed method and the general method for MDOF systems. The results from the study indicate that the proposed method can serve as a useful tool for evaluation of seismic performance of buildings, and carrying out performance based design.

  13. Performance evaluation of a motor-imagery-based EEG-Brain computer interface using a combined cue with heterogeneous training data in BCI-Naive subjects

    Directory of Open Access Journals (Sweden)

    Lee Youngbum

    2011-10-01

    Full Text Available Abstract Background The subjects in EEG-Brain computer interface (BCI system experience difficulties when attempting to obtain the consistent performance of the actual movement by motor imagery alone. It is necessary to find the optimal conditions and stimuli combinations that affect the performance factors of the EEG-BCI system to guarantee equipment safety and trust through the performance evaluation of using motor imagery characteristics that can be utilized in the EEG-BCI testing environment. Methods The experiment was carried out with 10 experienced subjects and 32 naive subjects on an EEG-BCI system. There were 3 experiments: The experienced homogeneous experiment, the naive homogeneous experiment and the naive heterogeneous experiment. Each experiment was compared in terms of the six audio-visual cue combinations and consisted of 50 trials. The EEG data was classified using the least square linear classifier in case of the naive subjects through the common spatial pattern filter. The accuracy was calculated using the training and test data set. The p-value of the accuracy was obtained through the statistical significance test. Results In the case in which a naive subject was trained by a heterogeneous combined cue and tested by a visual cue, the result was not only the highest accuracy (p Conclusions We propose the use of this measuring methodology of a heterogeneous combined cue for training data and a visual cue for test data by the typical EEG-BCI algorithm on the EEG-BCI system to achieve effectiveness in terms of consistence, stability, cost, time, and resources management without the need for a trial and error process.

  14. Evaluating the Performance of Wavelet-based Data-driven Models for Multistep-ahead Flood Forecasting in an Urbanized Watershed

    Science.gov (United States)

    Kasaee Roodsari, B.; Chandler, D. G.

    2015-12-01

    A real-time flood forecast system is presented to provide emergency management authorities sufficient lead time to execute plans for evacuation and asset protection in urban watersheds. This study investigates the performance of two hybrid models for real-time flood forecasting at different subcatchments of Ley Creek watershed, a heavily urbanized watershed in the vicinity of Syracuse, New York. Hybrid models include Wavelet-Based Artificial Neural Network (WANN) and Wavelet-Based Adaptive Neuro-Fuzzy Inference System (WANFIS). Both models are developed on the basis of real time stream network sensing. The wavelet approach is applied to decompose the collected water depth timeseries to Approximation and Detail components. The Approximation component is then used as an input to ANN and ANFIS models to forecast water level at lead times of 1 to 10 hours. The performance of WANN and WANFIS models are compared to ANN and ANFIS models for different lead times. Initial results demonstrated greater predictive power of hybrid models.

  15. International Space Station Sustaining Engineering: A Ground-Based Test Bed for Evaluating Integrated Environmental Control and Life Support System and Internal Thermal Control System Flight Performance

    Science.gov (United States)

    Ray, Charles D.; Perry, Jay L.; Callahan, David M.

    2000-01-01

    As the International Space Station's (ISS) various habitable modules are placed in service on orbit, the need to provide for sustaining engineering becomes increasingly important to ensure the proper function of critical onboard systems. Chief among these are the Environmental Control and Life Support System (ECLSS) and the Internal Thermal Control System (ITCS). Without either, life onboard the ISS would prove difficult or nearly impossible. For this reason, a ground-based ECLSS/ITCS hardware performance simulation capability has been developed at NASA's Marshall Space Flight Center. The ECLSS/ITCS Sustaining Engineering Test Bed will be used to assist the ISS Program in resolving hardware anomalies and performing periodic performance assessments. The ISS flight configuration being simulated by the test bed is described as well as ongoing activities related to its preparation for supporting ISS Mission 5A. Growth options for the test facility are presented whereby the current facility may be upgraded to enhance its capability for supporting future station operation well beyond Mission 5A. Test bed capabilities for demonstrating technology improvements of ECLSS hardware are also described.

  16. Research on Performance Evaluation System of Teaching Laboratory Based on the Calculus Methods%基于微积分思想的教学实验室绩效评价体系

    Institute of Scientific and Technical Information of China (English)

    蒋志萍

    2011-01-01

    如何提高教学实验室的使用绩效一直是高校实验室管理部门关注的热点,也是实验室管理的难点.设计了基于微积分思想的实验室绩效评价体系,描述各评价指标的内容,并分配权重,构建实验室绩效值的计算矩阵,实现了实验室绩效评价的量化.为高校的实验教学管理和增强教学实验室的投资效益和使用绩效提供了衡量标准.%It is always a research hotspot to enhance the using performance of teaching laboratories for the laboratory management department of universities and colleges. Designing a performance evaluation index system based on the calculus methods is an important approach of improving the teaching laboratory' s integration benefits. In this paper, the author designed a performance evaluation index system based on the calculus methods, described the contents of evaluation index system, distributed proportion, and design matrix of laboratory performance evaluation value, so as to realize quantization evaluation of laboratory performance. This research may be a significant scale criterion for laboratory management of universities and colleges, and also an important scale for investment benefit and using performance of teaching laboratory.

  17. Policy Decomposition for Evaluation Performance Improvement of PDP

    Directory of Open Access Journals (Sweden)

    Fan Deng

    2014-01-01

    Full Text Available In conventional centralized authorization models, the evaluation performance of policy decision point (PDP decreases obviously with the growing numbers of rules embodied in a policy. Aiming to improve the evaluation performance of PDP, a distributed policy evaluation engine called XDPEE is presented. In this engine, the unicity of PDP in the centralized authorization model is changed by increasing the number of PDPs. A policy should be decomposed into multiple subpolicies each with fewer rules by using a decomposition method, which can have the advantage of balancing the cost of subpolicies deployed to each PDP. Policy decomposition is the key problem of the evaluation performance improvement of PDPs. A greedy algorithm with O(nlgn time complexity for policy decomposition is constructed. In experiments, the policy of the LMS, VMS, and ASMS in real applications is decomposed separately into multiple subpolicies based on the greedy algorithm. Policy decomposition guarantees that the cost of subpolicies deployed to each PDP is equal or approximately equal. Experimental results show that (1 the method of policy decomposition improves the evaluation performance of PDPs effectively and that (2 the evaluation time of PDPs reduces with the growing numbers of PDPs.

  18. Blind Source Parameters for Performance Evaluation of Despeckling Filters.

    Science.gov (United States)

    Biradar, Nagashettappa; Dewal, M L; Rohit, ManojKumar; Gowre, Sanjaykumar; Gundge, Yogesh

    2016-01-01

    The speckle noise is inherent to transthoracic echocardiographic images. A standard noise-free reference echocardiographic image does not exist. The evaluation of filters based on the traditional parameters such as peak signal-to-noise ratio, mean square error, and structural similarity index may not reflect the true filter performance on echocardiographic images. Therefore, the performance of despeckling can be evaluated using blind assessment metrics like the speckle suppression index, speckle suppression and mean preservation index (SMPI), and beta metric. The need for noise-free reference image is overcome using these three parameters. This paper presents a comprehensive analysis and evaluation of eleven types of despeckling filters for echocardiographic images in terms of blind and traditional performance parameters along with clinical validation. The noise is effectively suppressed using the logarithmic neighborhood shrinkage (NeighShrink) embedded with Stein's unbiased risk estimation (SURE). The SMPI is three times more effective compared to the wavelet based generalized likelihood estimation approach. The quantitative evaluation and clinical validation reveal that the filters such as the nonlocal mean, posterior sampling based Bayesian estimation, hybrid median, and probabilistic patch based filters are acceptable whereas median, anisotropic diffusion, fuzzy, and Ripplet nonlinear approximation filters have limited applications for echocardiographic images. PMID:27298618

  19. Performance Evaluation of DSC Windows for Buildings

    Directory of Open Access Journals (Sweden)

    Jun-Gu Kang

    2013-01-01

    Full Text Available Interest in BIPV systems with dye-sensitized solar cells (DSCs that can replace building windows has increased for zero energy buildings. Although DSCs have lower efficiency in terms of electricity generation than silicon solar cells, they allow light transmission and application of various colors; they also have low production costs, which make them especially suitable for BIPV systems. DSC research is interdisciplinary, involving electrical, chemical, material, and metal engineering. A considerable amount of research has been conducted on increasing the electrical efficiency of DSC and their modules. However, there has not been sufficient research on building applications of DSC systems. The aim of this study is to evaluate the optical performance and thermal performance of DSC windows in buildings. For this study, DSC experimental models with different thicknesses and dye colors were manufactured, and their optical properties, such as transmittance and reflectivity, were measured by a spectrometer. The thermal and optical characteristics of double-glazed windows with DSC were analyzed with a window performance analysis program, WINDOW 6.0.

  20. CATTLE PRODUCTIVE PERFORMANCE EVALUATION CONFINED SUBMITTED IMMUNOCASTRATION

    Directory of Open Access Journals (Sweden)

    J. M. Maluf

    2016-09-01

    Full Text Available In order to evaluate the performance and carcass characteristics of cattle cross breeds ½ Aberdeen Angus x ½Nelore and Nelore confined submitted to immunocastration 218 male animals were used, feedlot, averaging 342 kg, divided into three experimental groups, T1: 117 steers ½ Angus x ½ Nelore no castrated (ANC, T2: 51 Nelore steers uncastrated (NNC and T3: 50 Nellore steers immunocastrated (NIC. The experiment lasted 144 days of confinement. The selection of animals for group formation was according to the individual weight, breed, sex condition and age. For immunocastration it wasused Bopriva® vaccine. The rating was finished according to the parameter used by the meatpacking industry ranging from 1 to 5. The experimental design was completely randomized in three groups. For the analyzes the variables studied statistics were submitted to analysis of variance (ANOVA and Tukey test both at the 5% level of significance. The results showed differences (p <0.01 at various features of productive performance and carcass between treatments. For slaughter weight, the ANC animals were higher (with 582.1 kg to Nelore, regardless of sexual condition, and the NNC were in turn heavier than the NIC, 527.4 and 503.7 respectively. Finally, it observed that the use of immunocastration in Nellore animals provided a decrease in productive performance of confined animals, but provided better finish carcass similar to crossbred (ANC.

  1. Game Performance Evaluation in Male Goalball Players

    Directory of Open Access Journals (Sweden)

    Molik Bartosz

    2015-12-01

    Full Text Available Goalball is a Paralympic sport exclusively for athletes who are visually impaired and blind. The aims of this study were twofold: to describe game performance of elite male goalball players based upon the degree of visual impairment, and to determine if game performance was related to anthropometric characteristics of elite male goalball players. The study sample consisted of 44 male goalball athletes. A total of 38 games were recorded during the Summer Paralympic Games in London 2012. Observations were reported using the Game Efficiency Sheet for Goalball. Additional anthropometric measurements included body mass (kg, body height (cm, the arm span (cm and length of the body in the defensive position (cm. The results differentiating both groups showed that the players with total blindness obtained higher means than the players with visual impairment for game indicators such as the sum of defense (p = 0.03 and the sum of good defense (p = 0.04. The players with visual impairment obtained higher results than those with total blindness for attack efficiency (p = 0.04, the sum of penalty defenses (p = 0.01, and fouls (p = 0.01. The study showed that athletes with blindness demonstrated higher game performance in defence. However, athletes with visual impairment presented higher efficiency in offensive actions. The analyses confirmed that body mass, body height, the arm span and length of the body in the defensive position did not differentiate players’ performance at the elite level.

  2. Performance-based inspection and maintenance strategies

    Energy Technology Data Exchange (ETDEWEB)

    Vesely, W.E.

    1995-04-01

    Performance-based inspection and maintenance strategies utilize measures of equipment performance to help guide inspection and maintenance activities. A relevant measure of performance for safety system components is component unavailability. The component unavailability can also be input into a plant risk model such as a Probabilistic Risk Assessment (PRA) to determine the associated plant risk performance. Based on the present and projected unavailability performance, or the present and projected risk performance, the effectiveness of current maintenance activities can be evaluated and this information can be used to plan future maintenance activities. A significant amount of information other than downtimes or failure times is collected or can be collected when an inspection or maintenance is conducted which can be used to estimate the component unavailability. This information generally involves observations on the condition or state of the component or component piecepart. The information can be detailed such as the amount of corrosion buildup or can be general such as the general state of the component described as {open_quotes}high degradation{close_quotes}, {open_quotes}moderate degradation{close_quotes}, or {open_quotes}low degradation{close_quotes}. Much of the information collected in maintenance logs is qualitative and fuzzy. As part of an NRC Research program on performance-based engineering modeling, approaches have been developed to apply Fuzzy Set Theory to information collected on the state of the component to determine the implied component or component piecepart unavailability. Demonstrations of the applications of Fuzzy Set Theory are presented utilizing information from plant maintenance logs. The demonstrations show the power of Fuzzy Set Theory in translating engineering information to reliability and risk implications.

  3. Evaluating State-Financed, Workplace-Based Retraining Programs: A Report on the Feasibility of a Business Screening and Performance Outcome Evaluation System. Research Report No. 89-08.

    Science.gov (United States)

    Creticos, Peter A.; Sheets, Robert G.

    The first objective of a two-phase project was to clarify the policy rationale and intervention model for state-financed workplace-based retraining programs in terms of their two objectives of retaining jobs and preventing unemployment. The second objective was to develop: (1) an evaluation system for these programs that was composed of business…

  4. Resarch on the Performance Evaluation Method of ERP Sandbox Course Based on the Improved Triangular FAHP%基于改进的三角FAHP的ERP沙盘课程成绩评价方法研究

    Institute of Scientific and Technical Information of China (English)

    陈群

    2015-01-01

    分析了现有的ERP沙盘课程的成绩评价方法,考虑到决策判断的模糊性,提出基于改进的三角模糊层次分析法进行该课程的成绩评价,解决了当前评价方法在指标权重及权重值确定上的主观性,最后通过算例验证了该方法的有效性。%This article analyze the existing performance Evaluation Method of Enterprise Resource Planning Sandbox Course, considering the fuzziness of the decision, proposing a performance Evaluation Method based on improved triangular fuzzy hierarchy analysis method, solving the subjectivity in the current evaluation methods. Finally, a numerical example is given to verify the validity of this method.

  5. Empirical Evaluation of Diagnostic Algorithm Performance Using a Generic Framework

    Directory of Open Access Journals (Sweden)

    Arjan van Gemund

    2010-01-01

    Full Text Available A variety of rule-based, model-based and datadriven techniques have been proposed for detection and isolation of faults in physical systems. However, there have been few efforts to comparatively analyze the performance of these approaches on the same system under identical conditions. One reason for this was the lack of a standard framework to perform this comparison. In this paper we introduce a framework, called DXF, that provides a common language to represent the system description, sensor data and the fault diagnosis results; a run-time architecture to execute the diagnosis algorithms under identical conditions and collect the diagnosis results; and an evaluation component that can compute performance metrics from the diagnosis results to compare the algorithms. We have used DXF to perform an empirical evaluation of 13 diagnostic algorithms on a hardware testbed (ADAPT at NASA Ames Research Center and on a set of synthetic circuits typically used as benchmarks in the model-based diagnosis community. Based on these empirical data we analyze the performance of each algorithm and suggest directions for future development.

  6. EVALUATION OF TYPES OF STRESS COPING MECHANISMS OF INDIVIDUALS PARTICIPATING IN PSYCHOLOGICAL PERFORMANCE CONSULTANCY TRAINING ON FOOTBALL BASED ON VARIOUS PARAMETERS

    Directory of Open Access Journals (Sweden)

    Meriç

    2016-04-01

    Full Text Available This study attempts to analyze the individualways of coping with stress based on various variables. The study group is comprised of people who attended Training for Psychological Performance Counselling in Football held by the Turkish Football Federation. There were 114 participants in total. The “Ways of Coping Scale”, developed by Folkman and Lazarus (1980 and revised and recreated by Şahin and Durak (1995, was employed in this study. Statistical analyses of the data were performed through frequency analysis, Mann-Whitney U analysis, and Kruskal Wallis H analysis via SPSS 15.0. It was seen at the end of the study that the most frequently preferred way of coping with stress is “self-confidence”. It was also seen that the ways of coping with stress significantly differ by gender. The female participants resorted statistically more to the “submissiveness” compared to the male participants while coping with stress (p<0.05. However, no significant difference was detected between the participants in terms of coping with stress by age, profession, and whether they engage in licensed sport activities.

  7. The Study of Strategic Performance Evaluation of H bank Based on BSC and APH%基于BSC和AHP法的H银行战略绩效评价研究

    Institute of Scientific and Technical Information of China (English)

    谭洪益

    2015-01-01

    本文以 H 银行作为案例,对该银行的战略绩效评价体系的实施效果进行研究.首先根据其发展战略绘制战略地图,并基于平衡计分卡构建的战略绩效评价体系,然后运用层次分析确定各指标的权重系数,最后采用综合指数法评价该银行战略绩效的实施效果.H银行通过实施基于平衡计分卡的战略绩效评价体系,确实提高了管理水平和竞争能力,同时也反馈其存在的问题和不足,从而不断改善该银行的战略绩效评价.%In the case of H Bank, this paper studies the implementation effect of strategic performance evaluation system. Firstly, in accordance with its development strategy to draw strategy map and build the strategic performance evaluation system based on the Balanced Scorecard, and then use AHP to determine the weight coefficient of each index, and finally use the method of integrated index to evaluate the strategic performance of the implementation of the bank's results. Through the implementation of strategic performance evaluation system based on the Balanced Scorecard, H bank really improve the management level and competitiveness, as well as feedback problems and shortcomings of its existence, in order to continuously improve strategic performance evaluation of the bank.

  8. Experimental Evaluation of High Performance Integrated Heat Pump

    Energy Technology Data Exchange (ETDEWEB)

    Miller, William A [ORNL; Berry, Robert [Unico Inc., St. Louis, MO; Durfee, Neal [ORNL; Baxter, Van D [ORNL

    2016-01-01

    Integrated heat pump (IHP) technology provides significant potential for energy savings and comfort improvement for residential buildings. In this study, we evaluate the performance of a high performance IHP that provides space heating, cooling, and water heating services. Experiments were conducted according to the ASHRAE Standard 206-2013 where 24 test conditions were identified in order to evaluate the IHP performance indices based on the airside performance. Empirical curve fits of the unit s compressor maps are used in conjunction with saturated condensing and evaporating refrigerant conditions to deduce the refrigerant mass flowrate, which, in turn was used to evaluate the refrigerant side performance as a check on the airside performance. Heat pump (compressor, fans, and controls) and water pump power were measured separately per requirements of Standard 206. The system was charged per the system manufacturer s specifications. System test results are presented for each operating mode. The overall IHP performance metrics are determined from the test results per the Standard 206 calculation procedures.

  9. Performance of an algebraic-based PSS

    Energy Technology Data Exchange (ETDEWEB)

    Ramirez, Juan M.; Sanchez, Victor M. [CINVESTAV - Unidad Guadalajara, Av. Cientifica 1145, Col, El Bajio, Zapopan, Jal. (Mexico); Correa, Rosa Elvira [Universidad Nacional de Colombia, Sede Medellin, Colombia (Mexico)

    2011-02-15

    The conventional power system stabilizer (PSS) contributes to the undamped electromechanical oscillations enhancement. This paper explores a PSS, which is based on physical concepts that allow a novel PSS to evaluate its output using simple decision rules. This PSS is formulated in an algebraic way, which eases its assembling and coordination. Results show the conventional and the novel PSS performances to damp out inter-area oscillations in a dynamic equivalent of an actual power grid. The feasibility of the novel PSS is demonstrated through its coordinated operation. It is tested on a real time board to emulate a single-machine infinite-bus (SMIB). (author)

  10. MTA Computer Based Evaluation System.

    Science.gov (United States)

    Brenner, Lisa P.; And Others

    The MTA PLATO-based evaluation system, which has been implemented by a consortium of schools of medical technology, is designed to be general-purpose, modular, data-driven, and interactive, and to accommodate other national and local item banks. The system provides a comprehensive interactive item-banking system in conjunction with online student…

  11. Performance Evaluation for Natural Disaster Emergency Logistics Based on DEA%基于DEA的自然灾害应急物流绩效评价

    Institute of Scientific and Technical Information of China (English)

    杨雪; 宋爱峰; 王菲

    2014-01-01

    在前人研究的基础上,统筹经济效益与社会效益两大救援目标,建立全面、综合、有代表性的指标体系;进而结合定性分析,运用定量分析方法-数据包络分析模型,对突发自然灾害下应急物流的绩效进行评价,为今后自然灾害下应急物流的改进提供一定的依据。%In this paper, on the basis of previous studies, we put economic interests and social interests under comprehensive consideration, built a comprehensive and representative index system for the natural disaster emergency logistics activities, and then adopted the data envelopment analysis model to evaluate the performance of the emergency logistics activities in the event of natural disaster outbreaks.

  12. 48 CFR 236.201 - Evaluation of contractor performance.

    Science.gov (United States)

    2010-10-01

    ... CONTRACTS Special Aspects of Contracting for Construction 236.201 Evaluation of contractor performance. (a) Preparation of performance evaluation reports. Use DD Form 2626, Performance Evaluation (Construction... 48 Federal Acquisition Regulations System 3 2010-10-01 2010-10-01 false Evaluation of...

  13. Study on Evaluation of Logistics Enterprise Performance Based on Management Effectiveness%基于管理有效性的物流企业绩效评价研究

    Institute of Scientific and Technical Information of China (English)

    杨俊峰

    2014-01-01

    鉴于传统绩效评价的局限性,在建立物流企业绩效评价体系的基础上,通过管理有效性的方法对我国27家物流企业2011-2012年间的数据进行管理绩效的实证分析,根据评价结果使企业认识到管理的差距与不足,同时验证了管理有效性的评价方法是对传统绩效评价的有效补充。%In this paper, in view of the limitation of the traditional performance evaluation methods and on the basis of the establishment of the logistics enterprise performance evaluation system, we analyzed empirically the management performance of 27 Chinese logistics enterprises for the period between 2011 and 2012 and then demonstrated the management effectiveness based evaluation process was a sufficient supplement to the traditional performance evaluation systems.

  14. 48 CFR 1252.216-72 - Performance evaluation plan.

    Science.gov (United States)

    2010-10-01

    ....216-72 Performance evaluation plan. As prescribed in (TAR) 48 CFR 1216.406(b), insert the following clause: Performance Evaluation Plan (OCT 1994) (a) A Performance Evaluation Plan shall be unilaterally... 48 Federal Acquisition Regulations System 5 2010-10-01 2010-10-01 false Performance...

  15. Novel evaluation method of TCP performance over satellite links

    Institute of Scientific and Technical Information of China (English)

    Wang Lina; Gu Xuemai

    2006-01-01

    A novel and efficient method to evaluate the transmission control protocol (TCP) performance over satellite links is presented. A TCP module is divided into three functional blocks, namely data processing, congestion control and error control. The re-established TCP module is easy to update TCP congestion control strategy or error control strategy. With the proposed analysis approach, the interactions between different congestion control and error control mechanisms, as well as the performance of various combination protocols in satellite environments have been investigated. Simulation results obtained through a series of experiments have shown that SNACK-based error control strategy can perform well with any other congestion control strategy. The best performance can be achieved by TCP New Reno congestion control strategy and SNACK-based error control strategy.

  16. 嵌入社会责任的企业绩效评价指标体系构建%The Construction of Social-responsibility-based Enterprise Performance Evaluation System

    Institute of Scientific and Technical Information of China (English)

    刘淑华; 刘东方; 张旭丽

    2012-01-01

    对于环境、社会以及利益相关方,企业必须承担更多的社会责任。同时,履行社会责任也能为企业带来效益,企业履行社会责任的状况在很大程度上影响着企业的综合绩效,以中国现有的企业绩效评价体系为基础,全面考虑企业的各利益相关者,从企业的财务绩效、管理绩效、环境绩效和社会绩效四个方面系统阐述了嵌入社会责任的企业绩效评价指标体系构建思路,并提出了评价指标的运用建议。%For the sake of environment,society and stakeholders,enterprises should bear more social responsibility,which can be of beneficial to enterprises as well.How well an enterprise fulfills its social responsibility,to a great extent,influences its own performance.Based on the study of the present performance evaluation system,this paper elaborates on the construction of social-responsibility-based enterprise performance evaluation system from the perspectives of financial performance,managerial performance,environmental performance and social performance.Suggestions on the application of these evaluations are also given.

  17. Seismic performance evaluation of concrete gravity dams

    Energy Technology Data Exchange (ETDEWEB)

    Yamaguchi, Y.; Sasaki, T.; Kanenawa, K. [Public Works Research Institute, Tsukuba City (Japan); Hall, R.; Yule, D. [United States Army Engineer Research and Development Center, Vicksburg, MS (United States); Matheu, E. [Louisiana State Univ., Baton Rouge, LA (United States); Chudgar, A. [United States Army Corps of Engineers, Washington, DC (United States)

    2004-07-01

    This paper addresses technical issues related to seismic design practices and current evaluation methods in Japan and the United States. Nonlinear analysis procedures can identify the ultimate capacity of existing concrete dams, taking into account the most critical nonlinear phenomena controlling the response. A numerical model of a non-overflow monolith of Koyna Dam, subject to earthquake motion, is used as a case study to compare the different approaches for seismic evaluation of concrete gravity dams currently employed in the two countries. The complexity of nonlinear analysis procedures and the scarcity of appropriate calibration strategies force analysts to frequently interpret results using their own judgment. It was concluded that the influence of the input parameters and ground excitation on the nonlinear dynamic response should be investigated in order to identify the most critical conditions. It was also suggested that methodologies for qualitative damage estimation based on results from linear analyses could be used to develop a systematic assessment tool and reference framework for the adequate interpretation of results. 14 refs., 2 tabs., 13 figs.

  18. Evaluation of CCHP systems performance based on operational cost, primary energy consumption, and carbon dioxide emission by utilizing an optimal operation scheme

    Energy Technology Data Exchange (ETDEWEB)

    Cho, Heejin; Mago, Pedro J.; Luck, Rogelio; Chamra, Louay M. [Department of Mechanical Engineering, Mississippi State University, 210 Carpenter Engineering Building, P.O. Box ME, Mississippi State, MS 39762-5925 (United States)

    2009-12-15

    Optimization of combined cooling, heating, and power (CCHP) systems operation commonly focuses only on energy cost. Different algorithms have been developed to attain optimal utilization of CCHP units by minimizing the energy cost in CCHP systems operation. However, other outcomes resulting from CCHP operation such as primary energy consumption and emission of pollutants should also be considered during CCHP systems evaluation as one would expect these outcomes can be subject to regulation. This paper presents an optimization of the operation of CCHP systems for different climate conditions based on operational cost, primary energy consumption (PEC), and carbon dioxide emissions (CDE) using an optimal energy dispatch algorithm. The results for the selected cities demonstrate that in general there is not a common trend among the three optimization modes presented in this paper since optimizing one parameter may reduce or increase the other two parameters. The only cities that show reduction of PEC while also reducing the CDE are Columbus, MS; Minneapolis, MN; and Miami, FL. For these cities the operational cost always increases when compared to the reference case consisting of using a vapor/compression cycle for cooling and natural gas for heating. On the other hand, for San Francisco and Boston, CCHP systems increase the CDE. In general, if CCHP systems increase the cost of operation, as long as energy savings and reduction of emissions are guaranteed, the implementation of these systems should be considered. (author)

  19. Management of Human Performance in Offshore Platform Maintenance Based on Fuzzy Comprehensive Evaluation%海洋钻井平台维修中的人因管理

    Institute of Scientific and Technical Information of China (English)

    余建星; 张贵珍; 柴松; 马维林

    2012-01-01

    Shengli oilfield;horizontal well;screen;long life;intelligentWith higher reliability of the offshore production equipment, human reliability becomes more and more important in determining safety in the gas and oil production industry. As a matter of fact,management of human factor in platform maintenance is a significant aspect of human reliability management. Current methods that are aimed at controlling human error in maintenance have two vital disadvantages. On the one hand, they tend to be reactive rather proactive; on the other hand they are qualitative description rather than quantitative assessment. However, a successful plan to manage human factor should not only be able to find out causes of the past accidents and damages but also be able to detect which issue is most likely to lead to future incidents. Therefore, Fuzzy Comprehensive Evaluation, which is semi-qualitative and semi-quantitative, is used in this article. Through a fuzzy assessment of factors that affect maintenance performance, weaknesses and problems of the organization can be recognized, thus helping preventing human error from happening.%人员可靠性越来越成为制约海样钻井平台生产安全的重要因素,海洋平台维修中的人为因素管理是人因可靠性的一个重要方面.目前国内外控制维修中人为差错方法,一方面趋向于被动反应式而不是主动前瞻式的管理;另一方面属于定性评价而非定量分析.选用定性与定量结合的模糊综合评价法,对维修组织各因素的安全性进行评价,找出弱项,以预防维修中人为差错的产生.

  20. Performance Evaluation of the CloudStack Private Cloud

    Directory of Open Access Journals (Sweden)

    Mumtaz M.Ali AL-Mukhtar

    2014-02-01

    Full Text Available The number of open source cloud platforms is increasing day by day.The features of these platforms vary significantly and this creates a difficulty for cloud consumers to choose the platforms based on their requirments.In this paper we build a private cloud using Cloudstack , a popular open source platform used to built Infrastructure as a Service(IaaS cloud.We presents its architecure and analyze performance of virtual machines initiated and managed by the Cloudstack in terms of CPU usage,memory bandwidth,disk I/O speed and networking performance using suitable benchmarks.Different vitual machine management operations such as add ,delete and live migration are also evaluated .The performance evaluation of Cloudstack can help to determine its suability to be adopted as on premise cloud solution.

  1. Performance-based asphalt mixture design methodology

    Science.gov (United States)

    Ali, Al-Hosain Mansour

    Today, several State D.O.T.s are being investigating the use of tire rubber with local conventional materials. Several of the ongoing investigations identified potential benefits from the use of these materials, including improvements in material properties and performance. One of the major problems is being associated with the transferability of asphalt rubber technology without appropriately considering the effects of the variety of conventional materials on mixture behavior and performance. Typically, the design of these mixtures is being adapted to the physical properties of the conventional materials by using the empirical Marshall mixture design and without considering fundamental mixture behavior and performance. Use of design criteria related to the most common modes of failure for asphalt mixtures, such as rutting, fatigue cracking, and low temperature thermal cracking have to be developed and used for identifying the "best mixture," in term of performance, for the specific local materials and loading conditions. The main objective of this study was the development of a mixture design methodology that considers mixture behavior and performance. In order to achieve this objective a laboratory investigation able to evaluate mixture properties that can be related to mixture performance, (in terms of rutting, low temperature cracking, moisture damage and fatigue), and simulating the actual field loading conditions that the material is being exposed to, was conducted. The results proved that the inclusion of rubber into asphalt mixtures improved physical characteristics such as elasticity, flexibility, rebound, aging properties, increased fatigue resistance, and reduced rutting potential. The possibility of coupling the traditional Marshall mix design method with parameters related to mixture behavior and performance was investigated. Also, the SHRP SUPERPAVE mix design methodology was reviewed and considered in this study for the development of an integrated

  2. Performance Evaluation of CDMA Router for Network-On-Chip

    Directory of Open Access Journals (Sweden)

    Anant W. Hinganikar

    2012-07-01

    Full Text Available This paper presents the performance evaluation of router based on code division multiple access technique (CDMA for Network-on-Chip (NoC. The design is synthesized using Xilinx Virtex4 XC4VLX200 device. The functional behavior is verified using Modelsim XE III 6.2 C. The delay and throughput values are obtained for variable payload sizes. Throughput-Power and Delay-Power characteristics are also verified for NoC.

  3. Performance Evaluation of CDMA Router for Network-On-Chip

    OpenAIRE

    Anant W. Hinganikar; Mahendra A. Gaikwad; Patrikar, Rajendra M.

    2012-01-01

    This paper presents the performance evaluation of router based on code division multiple access technique (CDMA) for Network-on-Chip (NoC). The design is synthesized using Xilinx Virtex4 XC4VLX200 device. The functional behavior is verified using Modelsim XE III 6.2 C. The delay and throughput values are obtained for variable payload sizes. Throughput-Power and Delay-Power characteristics are also verified for NoC.

  4. Evaluation of Comparative Performance of Three Wind Turbine Rotors

    OpenAIRE

    Basharat Salim; Mahir Es-Saheb

    2013-01-01

    This study presents the performance evaluation of wind turbine implementing the mathematical model based on Blade Element Momentum (BEM) theory. The investigation concentrates on the comparison of power producing characteristics of three types of rotors for a horizontal axis wind turbine. The rotors considered have rectangular plan form shape with sections fabricated from aerofoil sections of NACA families. The three families of NACA airfoils used in this investigation are NACA4424, NACA23024...

  5. Performance Evaluation of CDMA Router for Network-On-Chip

    Directory of Open Access Journals (Sweden)

    Anant W. Hinganikar

    2012-06-01

    Full Text Available This paper presents the performance evaluation of router based on code division multiple access technique (CDMA for Network-on-Chip (NoC. The design is synthesized using Xilinx Virtex4 XC4VLX200 device. The functional behavior is verified using Modelsim XE III 6.2 C. The delay and throughput values are obtained for variable payload sizes. Throughput-Power and Delay-Power characteristics are also verified for NoC.

  6. Research on Comprehensive Performance Evaluation Based on Improved AHP-Fuzzy Second-Hand Car%基于改进AHP-Fuzzy的二手车性能综合评估研究

    Institute of Scientific and Technical Information of China (English)

    丁海波; 牛丽

    2013-01-01

    研究二手车的性能综合评估问题,确定较为全面合理的评估指标体系。针对传统AHP的不足,提出采用三标度法及最优传递矩阵来构造判断矩阵,直接求出评价指标的权重,避免对判断矩阵的一致性检验和调整。建立基于改进AHP-Fuzzy的二手车性能综合评估模型,将仪器检测和专家打分两种方法相结合来实现定量和定性指标的模糊综合评价。在一定程度上解决二手车性能评估的模糊性问题,计算过程科学简便,为二手车的价格评估提供科学的参考依据。%Research on the comprehensive performance evaluation of second-hand car to establish a more comprehensive and rational evaluation system. This paper proposes a three demarcation method and optimal transfer matrix to construct the judgment matrix, directly obtain the weight of evaluation index, avoiding the consistency check and adjustment to judgment matrix. Establish the comprehensive performance evaluation model based on the improved AHP-Fuzzy second-hand car and realize the comprehensive fuzzy evaluation according to quantitative and qualitative index through the combination of detection equipment and expert scoring methods. In this way, the fuzziness problem of second hand car performance evaluation will be solved to certain extent. The calculating process will be simple and scientific and provide scientific reference for the price evaluation of second-hand cars.

  7. Performance Evaluation of Routing Protocols in MANET

    Directory of Open Access Journals (Sweden)

    Smitha Sunny

    2015-01-01

    Full Text Available Mobile Ad-Hoc Network (MANET is an autonomous system that is composed of the mobile nodes which communicates through wireless links without any preexisting infrastructure. MANET is a collection of mobile nodes which can self-organize freely and dynamically into arbitrary and temporary network topologies. Mobile nodes in ad-hoc networks function as a router and can dynamically establish routes among themselves by means of a routing protocol. Routing protocols in mobile ad-hoc network helps node to send and receive packets. Therefore, selection of an appropriate routing protocol is an integral part of establishing a MANET. A suitable and effective routing mechanism helps to extend the successful deployment of mobile ad-hoc networks. An attempt has been made to compare the performance between on-demand reactive routing protocols namely AODV, DSR and proactive routing protocol namely DSDV for Constant Bit Rate (CBR traffic by varying network scope i.e. number of participating nodes as well as by varying the speed. The parameters used for evaluation are Packet delivery ratio (PDR, Normalized routing overhead, Average end to end delay (Delay, Throughput and Average Energy consumption. The simulations are carried out using Network Simulator NS2:34.

  8. Performance Evaluation of an Infrared Thermocouple

    Directory of Open Access Journals (Sweden)

    Te-Ching Shen

    2010-11-01

    Full Text Available The measurement of the leaf temperature of forests or agricultural plants is an important technique for the monitoring of the physiological state of crops. The infrared thermometer is a convenient device due to its fast response and nondestructive measurement technique. Nowadays, a novel infrared thermocouple, developed with the same measurement principle of the infrared thermometer but using a different detector, has been commercialized for non-contact temperature measurement. The performances of two-kinds of infrared thermocouples were evaluated in this study. The standard temperature was maintained by a temperature calibrator and a special black cavity device. The results indicated that both types of infrared thermocouples had good precision. The error distribution ranged from −1.8 °C to 18 °C as the reading values served as the true values. Within the range from 13 °C to 37 °C, the adequate calibration equations were the high-order polynomial equations. Within the narrower range from 20 °C to 35 °C, the adequate equation was a linear equation for one sensor and a two-order polynomial equation for the other sensor. The accuracy of the two kinds of infrared thermocouple was improved by nearly 0.4 °C with the calibration equations. These devices could serve as mobile monitoring tools for in situ and real time routine estimation of leaf temperatures.

  9. Model of service-oriented catering supply chain performance evaluation

    Directory of Open Access Journals (Sweden)

    Juanqiong Gou

    2013-03-01

    Full Text Available Purpose: The aim of this paper is constructing a performance evaluation model for service-oriented catering supply chain. Design/methodology/approach: With the research on the current situation of catering industry, this paper summarized the characters of the catering supply chain, and then presents the service-oriented catering supply chain model based on the platform of logistics and information. At last, the fuzzy AHP method is used to evaluate the performance of service-oriented catering supply chain. Findings: With the analysis of the characteristics of catering supply chain, we construct the performance evaluation model in order to guarantee the food safety, logistics efficiency, price stability and so on. Practical implications: In order to evolve an efficient and effective service supply chain, it can not only used to own enterprise improvement, but also can be used for selecting different customers, to choose a different model of development. Originality/value: This paper has a new definition of service-oriented catering supply chain. And it offers a model to evaluate the performance of this catering supply chain.

  10. 基于BSC的高校科研团队绩效模糊综合评价研究%Fuzzy Comprehensive Evaluation Research on University Scientific Research Team' s Performance Based on BSC

    Institute of Scientific and Technical Information of China (English)

    朱火弟; 杨成

    2013-01-01

    On the basis of analyzing the traditional evaluation system, according to the basic principles of Balanced Score Card ( BSC) and the features of university scientific team, the paper constructs the indicator system of university scientific team' s performance evaluation based on BSC. With the application of Fuzzy Comprehensive method based on Analytic Hierarchy Process, the article evaluates the university scientific team and offers one new approach of evaluating the university scientific team' s performance that has stronger practicality and operability.%在分析传统高校科研团队绩效评价体系的基础上,根据平衡计分卡(BSC)的基本原理,结合高校科研团队的特点,构建基于BSC的高校科研团队绩效评价指标体系,并运用基于层次分析法(AHP)的模糊评价法,对高校科研团队进行评价,给出实用性和操作性更强的高校科研团队绩效评价的新方法.

  11. Performance Evaluation of Sonar Equipment Based on Grey-AHP%基于灰色层次分析法的声纳装备性能评估磁

    Institute of Scientific and Technical Information of China (English)

    张朋坤; 胡金华; 袁骏; 张卫

    2015-01-01

    针对声纳装备性能评估中性能指标的不确定性与层次性,在构建声纳装备性能指标体系的基础上,引入了灰色层次分析法(GAHP),给出了具体的评估模型与步骤,并以典型声纳装备为例对模型进行验证,结果表明该方法可以较为准确地反映声纳装备的实际使用情况,能够适用于声纳装备性能的评估。%Aiming at the fuzziness and hierarchy of performance indexes in performance evaluation of sonar equipment , it adopts the grey analytical hierarchy process based on building the scheme performance indexes system of sonar equipment . The concrete processes of the evaluation model are described .And with the typical sonar equipment for example carried on a verification on model ,the result indicates that the model can reflect the actual situation of sonar equipment correctly and can be used in performance evaluation of sonar equipment .

  12. Manufacturing plant performance evaluation by discrete event simulation

    International Nuclear Information System (INIS)

    A case study was conducted to evaluate the performance of a manufacturing plant using discrete event simulation technique. The study was carried out on animal feed production plant. Sterifeed plant at Malaysian Institute for Nuclear Technology Research (MINT), Selangor, Malaysia. The plant was modelled base on the actual manufacturing activities recorded by the operators. The simulation was carried out using a discrete event simulation software. The model was validated by comparing the simulation results with the actual operational data of the plant. The simulation results show some weaknesses with the current plant design and proposals were made to improve the plant performance. (Author)

  13. Evaluation of Operation Performance of Flow Manufacturing System based on Combination Evaluation Method%基于组合评价法的混流生产系统运行绩效评价

    Institute of Scientific and Technical Information of China (English)

    李高阳; 桑晓明

    2014-01-01

    在目前集装箱制造行业转型升级的背景下,以某集装箱制造公司的特箱生产系统为例,构建混流生产系统运行绩效的评价指标体系,运用组合评价法对运行绩效进行评价。借鉴平衡计分卡的分析思路,对特箱生产系统的生产管理给出了相关的决策建议。此研究成果对其他制造型混流生产系统具有实际的指导意义。%In container manufacturing industry transformation and upgrading of the background , we taking the special production line of a container manufacturing company as an example , evaluation index system of flow manufacturing system operating performance, using a combination of assessment methods to evaluate the perfor-mance of the operation. Referring to the theory of balanced score card , some suggestions of related production management of special production line were given. This research results to other manufacturing mixed productions ystem has practical significance.

  14. 48 CFR 1552.209-76 - Contractor performance evaluations.

    Science.gov (United States)

    2010-10-01

    ... 1552.209-76 Contractor performance evaluations. As prescribed in section 1509.170-1, insert the following clause in all applicable solicitations and contracts. Contractor Performance Evaluations (OCT 2002... compliance with safety standards performance categories if deemed appropriate for the evaluation or...

  15. 48 CFR 2452.216-73 - Performance evaluation plan.

    Science.gov (United States)

    2010-10-01

    ... 48 Federal Acquisition Regulations System 6 2010-10-01 2010-10-01 true Performance evaluation plan... 2452.216-73 Performance evaluation plan. As prescribed in 2416.406(e)(3), insert the following clause in all award fee contracts: Performance Evaluation Plan (AUG 1987) (a) The Government...

  16. 10 CFR 1045.9 - RD classification performance evaluation.

    Science.gov (United States)

    2010-01-01

    ... 10 Energy 4 2010-01-01 2010-01-01 false RD classification performance evaluation. 1045.9 Section... classification performance evaluation. (a) Heads of agencies shall ensure that RD management officials and those... RD or FRD documents shall have their personnel performance evaluated with respect to...

  17. 48 CFR 8.406-7 - Contractor Performance Evaluation.

    Science.gov (United States)

    2010-10-01

    ... Performance Evaluation. Ordering activities must prepare an evaluation of contractor performance for each... 48 Federal Acquisition Regulations System 1 2010-10-01 2010-10-01 false Contractor Performance Evaluation. 8.406-7 Section 8.406-7 Federal Acquisition Regulations System FEDERAL ACQUISITION...

  18. 24 CFR 570.491 - Performance and evaluation report.

    Science.gov (United States)

    2010-04-01

    ... Development Block Grant Program § 570.491 Performance and evaluation report. The annual performance and evaluation report shall be submitted in accordance with 24 CFR part 91. (Approved by the Office of Management... 24 Housing and Urban Development 3 2010-04-01 2010-04-01 false Performance and evaluation...

  19. A Research on Evaluation of Spare Parts Service Performance Based on GIOWA%基于 GIOWA 算子的备件服务绩效评价方法

    Institute of Scientific and Technical Information of China (English)

    朱永坤; 明新国; 李国明

    2014-01-01

    The evaluation research on the service business based on the perspective of the customer per -ception is inadequate and the importance given to the attributes of the different product spare parts service is high disparate due to the different types of services and other factors .Thus it is difficult to give service attributes fixed weights .Spare parts service performance evaluation system is established by drawing SE-RVQUAL model , in order to comprehensively analyze the factors affecting the performance of spare parts . So the evaluation of spare parts service performance applies GIOWA operator to integrate multiple sets of fuzzy and uncertain customer evaluation information to evaluate the spare parts service performance in the perspective of the customer perception , which achieves good results on vague language evaluation and pro-vides an evaluation method which is the combination of qualitative and quantitative evaluation of spare parts service performance .%当前对服务绩效的研究更多的是对服务质量的衡量,但缺少从顾客感知的角度对服务业务的评价研究。同时,由于不同产品备件服务的属性重要性随着服务类型等因素的不同而有较大的差距,很难赋予服务属性固定的权重值。因此,为了全面分析备件服务绩效的影响因素,参考SERVQUAL模型建立了备件服务绩效评价体系。为了从顾客感知的角度对服务业务进行评价,采用GIOWA算子的方法以有效地融合评价体系中的多组模糊和不确定的客户评价信息。实例结果表明,该方法取得了对模糊语言评价的良好集结效果,为备件服务绩效评价提供了一种定性和定量相结合的评价方法。

  20. 40 CFR 35.515 - Evaluation of performance.

    Science.gov (United States)

    2010-07-01

    ... 40 Protection of Environment 1 2010-07-01 2010-07-01 false Evaluation of performance. 35.515....515 Evaluation of performance. (a) Joint evaluation process. The applicant and the Regional... Administrator's decision under the dispute processes in 40 CFR 31.70. (d) Evaluation reports. The...

  1. 40 CFR 35.115 - Evaluation of performance.

    Science.gov (United States)

    2010-07-01

    ... 40 Protection of Environment 1 2010-07-01 2010-07-01 false Evaluation of performance. 35.115... Evaluation of performance. (a) Joint evaluation process. The applicant and the Regional Administrator will... requirements for progress reporting under 40 CFR 31.40(b). (b) Elements of the evaluation process....

  2. Flexible pavement performance evaluation using deflection criteria

    Science.gov (United States)

    Wedner, R. J.

    1980-04-01

    Flexible pavement projects in Nebraska were monitored for dynamic deflections, roughness, and distress for six consecutive years. Present surface conditions were characterized and data for evaluating rehabilitation needs, including amount of overlay, were provided. Data were evaluated and factors were isolated for determining the structural adequacy of flexible pavements, evaluating existing pavement strength and soil subgrade conditions, and determining overlay thickness requirements. Terms for evaluating structural condition for pavement sufficiently ratings were developed and existing soil support value and subgrade strength province maps were evaluated.

  3. UNIX-based operating systems robustness evaluation

    Science.gov (United States)

    Chang, Yu-Ming

    1996-01-01

    Robust operating systems are required for reliable computing. Techniques for robustness evaluation of operating systems not only enhance the understanding of the reliability of computer systems, but also provide valuable feed- back to system designers. This thesis presents results from robustness evaluation experiments on five UNIX-based operating systems, which include Digital Equipment's OSF/l, Hewlett Packard's HP-UX, Sun Microsystems' Solaris and SunOS, and Silicon Graphics' IRIX. Three sets of experiments were performed. The methodology for evaluation tested (1) the exception handling mechanism, (2) system resource management, and (3) system capacity under high workload stress. An exception generator was used to evaluate the exception handling mechanism of the operating systems. Results included exit status of the exception generator and the system state. Resource management techniques used by individual operating systems were tested using programs designed to usurp system resources such as physical memory and process slots. Finally, the workload stress testing evaluated the effect of the workload on system performance by running a synthetic workload and recording the response time of local and remote user requests. Moderate to severe performance degradations were observed on the systems under stress.

  4. 基于AH P-模糊综合评价法的轮履复合型搜索机器人性能评价及其软件开发%Performance Evaluation for Search Robots With Wheel-Track Based on AHP-Fuzzy Comprehensive Evaluation and Development of Evaluation Software

    Institute of Scientific and Technical Information of China (English)

    赵京; 杨聪; 胡卫建

    2016-01-01

    针对中国在地震搜救机器人评价方面的研究尚浅,首先,介绍轮履复合型搜索机器人的运动模式,构建了一套性能评价指标体系,并制定了指标的详细测试标准,为实际测试提供参考依据。其次,根据指标多层次、多因素且定量与定性相结合的特点,提出应用AHP-模糊综合评价法对轮履复合型搜索机器人评价。第三,基于构建的性能评价指标体系与AHP-模糊综合评价法,提出了一套完整的轮履复合型搜索机器人的综合评价体系。第四,基于该评价体系开发了一套用于轮履复合型机器人性能评价的软件。该软件可管理机器人数据、专家数据、指标体系和评价标准,并可根据专家打分和实测数据得出评价结果。最后,通过实例验证了该评价体系和软件的有效性。结果表明:该轮履复合型搜索机器人的综合性能处于中等水平。%Currently, there is no integrated research in evaluation of earthquake search robots in China. Therefore, the evaluation of earthquake search robots is systematically studied in this paper. First, motion patterns of the search robots with wheel-track were introduced, a performance evaluation index system was established for the search robots with wheel-track, and a testing standard for each index was constructed to provide a useful reference for actual tests. Second, due to the multiple levels, multiple factors, and the combination of quantitative and qualitative indices characteristics of the index system, AHP-Fuzzy comprehensive evaluation could be applied to evaluate performance of the search robots with wheel-track. Third, an evaluation system for search robots with wheel-track was proposed based on the performance evaluation index system and AHP-Fuzzy comprehensive evaluation method. Fourth, software was developed according to this evaluation system. This software could manage robotic information, experts

  5. Research on government procurement performance evaluation based on BSC%基于平衡计分卡的医学院校政府采购绩效评价初探

    Institute of Scientific and Technical Information of China (English)

    张威; 张海; 朱飞燕

    2016-01-01

    Objective:To investigate the application of Balanced Scorecard (BSC) in the performance evaluation system of government procurement in medical colleges and universities based on the analysis of the current government procurement process.Methods: According to the theoretical and methodological analysis of BSC, the performance evaluation is divided into four major aspects of assessment indicators, learning and growth, business process, customer and finance, which breaks the traditional performance evaluation way of only focusing on the of financial indicators. Delphi method has been involved to determine the weights.Results: Based on the theory of BSC, the specific evaluation index and weight of the government procurement performance evaluation system in medical colleges and universities are put forward and proved by practice.Conclusion: A reasonable evaluation of the performance system established according to BSC will help to improve the beneficial results, efficiency and economy output of the procurement funds, and the management of government procurement in medical colleges.%目的:通过对目前医学院校政府采购过程的分析,研究平衡计分卡在医学院校政府采购绩效评价体系中的应用。方法:根据平衡计分卡方法理论分析,将绩效考核目标分解为学习与成长、业务流程、客户及财务等4方面考核指标,打破传统单一的只注重财务指标的绩效评价。通过德尔斐法(Delphi)确定考核指标的相关权重。结果:运用平衡计分卡方法理论,提出医学院校政府采购绩效评价体系中的具体考核指标及相应权重,并经过实例得到验证。结论:利用平衡计分卡建立合理的评价绩效体系,将有利于提高采购资金使用的效益、效率和经济性,提高医学院校政府采购管理水平。

  6. Market behavior and performance of different strategy evaluation schemes

    Science.gov (United States)

    Baek, Yongjoo; Lee, Sang Hoon; Jeong, Hawoong

    2010-08-01

    Strategy evaluation schemes are a crucial factor in any agent-based market model, as they determine the agents’ strategy preferences and consequently their behavioral pattern. This study investigates how the strategy evaluation schemes adopted by agents affect their performance in conjunction with the market circumstances. We observe the performance of three strategy evaluation schemes, the history-dependent wealth game, the trend-opposing minority game, and the trend-following majority game, in a stock market where the price is exogenously determined. The price is either directly adopted from the real stock market indices or generated with a Markov chain of order ≤2 . Each scheme’s success is quantified by average wealth accumulated by the traders equipped with the scheme. The wealth game, as it learns from the history, shows relatively good performance unless the market is highly unpredictable. The majority game is successful in a trendy market dominated by long periods of sustained price increase or decrease. On the other hand, the minority game is suitable for a market with persistent zigzag price patterns. We also discuss the consequence of implementing finite memory in the scoring processes of strategies. Our findings suggest under which market circumstances each evaluation scheme is appropriate for modeling the behavior of real market traders.

  7. On the Performance Evaluation of Teaching Team in Higher Vocational Colleges Based on Lawler-Porter Model%基于Lawler-Porter综合激励模型的职业院校教学团队绩效评价

    Institute of Scientific and Technical Information of China (English)

    徐旦

    2015-01-01

    From the perspective of team members, teaching teams, or vocational schools, the effective evaluation of teaching teams in vocational colleges is an important carrier to promote the development of teachers' professional , encourage teaching teams to serve the community, improve the quality of technical skills training and improve the level of vocational colleges. The research premise, paradigm and conclusions of Lawler-Porter Model provide a clear theoretical path for the construction of teaching team performance evaluation and its formation mechanism in vocational colleges. The construction of performance evaluation of teaching teams in Vocational Colleges based on Lawler-Porter Model includes: improving the performance evaluation method, enriching the subjective and object of performance evaluation, developing the quantitative index of performance evaluation, and forming a diversified evaluation standard. The formation mechanism includes: creating a good working environment, establishing a positive institutional environment, forming a professional environment that is close to the social needs, and creating a harmonious and active cultural environment.%Lawler-Porter综合激励模型的研究前提、研究范式和研究结论为职业院校教学团队绩效评价的构建及其形成机制提供了较为清晰的理论路径.基于Lawler-Porter综合激励模型的职业院校教学团队绩效评价构建包括:改进绩效评价方法;丰富绩效评价主客体;拓展绩效评价量化指标;形成多元化评价标准.基于Lawler-Porter综合激励模型的职业院校教学团队绩效评价形成机制包括:创设良好的工作环境;建立积极的制度环境;形成紧贴社会需求的专业环境;塑造和谐积极的文化环境.

  8. Performance Evaluation of 802.11p-Based Ad Hoc Vehicle-to-Vehicle Communications for Usual Applications Under Realistic Urban Mobility

    Directory of Open Access Journals (Sweden)

    Patrick Sondi

    2016-05-01

    Full Text Available In vehicular ad hoc networks, participating vehicles organize themselves in order to support lots of emerging applications. While network infrastructure can be dimensioned correctly in order to provide quality of service support to both vehicle-to-vehicle and vehicle-to-infrastructure communications, there are still many issues to achieve the same performance using only ad hoc vehicle-to-vehicle communications. This paper investigates the performance of such communications for complete applications including their specific packet size, packet acknowledgement mechanisms and quality of service requirements. The simulation experiments are performed using Riverbed (OPNET Modeler on a network topology made of 50 nodes equipped with IEEE 802.11p technology and following realistic trajectories in the streets of Paris at authorized speeds. The results show that almost all application types are well supported, provided that the source and the destination have a direct link. Particularly, it is pointed out that introducing supplementary hops in a communication has more effects on end-to-end delay and loss rate rather than mobility of the nodes. The study also shows that ad hoc reactive routing protocols degrade performance by increasing the delays while proactive ones introduce the same counter performance by increasing the network load with routing traffic. Whatever the routing protocol adopted, the best performance is obtained only while small groups of nodes communicate using at most two-hop routes.

  9. Verification and Performance Evaluation of Timed Game Strategies

    DEFF Research Database (Denmark)

    David, Alexandre; Fang, Huixing; Larsen, Kim Guldstrand;

    2014-01-01

    under the synthesized strategy in order to verify additional correctness properties. Secondly, we want to apply statistical model checking to evaluate various performance aspects of the synthesized strategy. For this, the underlying timed game is extended with relevant price and stochastic information......Control synthesis techniques, based on timed games, derive strategies to ensure a given control objective, e.g., time-bounded reachability. Model checking verifies correctness properties of systems. Statistical model checking can be used to analyse performance aspects of systems, e.g., energy......, then verifies and evaluates this strategy with respect to additional properties. We demonstrate the usefulness of this new branch of Uppaal using two case-studies....

  10. Performance evaluation of effluent treatment plant for automobile industry

    Energy Technology Data Exchange (ETDEWEB)

    Ansari, Farid [Department of Applied Science and Humanities, PDM College of Engineering, Bahadurgarh (Haryana) (India); Pandey, Yashwant K. [School of Energy and Environmental Studies, Devi Ahilya Vishwavidyalaya, Indore (India); Kumar, P.; Pandey, Priyanka [Department of Environmental Science, Post Graduate College Ghazipur (IN

    2013-07-01

    The automobile industry’s wastewater not only contains high levels of suspended and total solids such as oil, grease, dyestuff, chromium, phosphate in washing products, and coloring, at various stages of manufacturing but also, a significant amount of dissolved organics, resulting in high BOD or COD loads. The study reveals the performance, evaluation and operational aspects of effluent treatment plant and its treatability, rather than the contamination status of the real property. The Results revealed that the treated effluent shows most of the parameters are within permissible limits of Central Pollution Control Board (CPCB), India and based on the site visits, discussion with operation peoples, evaluation of process design, treatment system, existing effluent discharge, results of sample analyzed and found that effluent treatment plant of automobile industry are under performance satisfactory.

  11. 基于可持续发展理念和AHP的高校绩效评价研究%Research on University Performance Evaluation Based on Sustainable Development Theory and AHP

    Institute of Scientific and Technical Information of China (English)

    姜彤彤

    2011-01-01

    It is useful to allocate higher education resources rationally by evaluating university performance. Firstly, this paper establishes a general performance evaluation system including 4 level indicators and 18 secondary indicators based on sustainable development theory. Secondly, a pair-wise judgments comparison matrix is constructed using AHP method, and in the meanwhile the weight of indexes is computed. Finally, this paper analyzes and evaluates the performance of Finance and Economics universities directly under the administration of Ministry.%为了以绩效为导向合理分配高等教育资源,必须进行高校绩效的综合评价。首先,在可持续发展理念指导下,建立由4个一级指标和18个二级指标组成的高校绩效综合评价指标体系;其次,应用层次分析法构造两两判断矩阵,在层次单排序和总排序基础上计算各指标权重;最后,基于教育部直属财经类高校数据进行实证研究,并对结果加以分析。

  12. 基于平衡记分卡的村级社会管理绩效评估指标体系研究%On the Evaluation Index System of Rural Social Management Performance based on the Balanced Scorecard

    Institute of Scientific and Technical Information of China (English)

    杜伟珊; 肖湘雄

    2013-01-01

    In order to strengthen the effectiveness of village-level social management , social management of village-level performance evaluation index system in-depth investigation and analysis to determine the village's main social management performance evaluation index , based on the balanced scorecard in the innovation , to build the village level of social management performance evaluation index system , and uses AHP method for the quantitative analysis of some indicators.%为了加强村级社会管理实效,对村级社会管理绩效评估指标体系的构建进行了深入调查和分析,确定了村级社会管理绩效评估的主干指标,在创新平衡记分卡的基础上,构建了村级社会管理绩效评估指标体系,并运用AHP法对部分指标进行了定量分析。

  13. 基于Malmquist指数的创新团队合作研发绩效评价%The Evaluation of the Cooperative R& D Performance of Innovative Groups Based on Malmquist Index

    Institute of Scientific and Technical Information of China (English)

    戚湧; 孟小燕; 赵宏; 丁刚

    2011-01-01

    在科研绩效评价中,传统的基于多指标的综合评价方法无法区别投入性指标和产出性指标对效率提升和技术进步的影响.在构建评价指标体系的基础上,将Malmquist指数应用于创新团队合作研发绩效评价中,将经济学的理论解释功能和管理学的相关方法论完美结合,并证明了该方法的有效性.%The traditional Multi-index Comprehensive Evaluation Method can't differentiate the effect of input index and output index on efficiency improving and technology advancing in performance evaluation in research. Therefore, based on construction of evaluation index system, the paper applies Malmquist index in the evaluation of cooperative R&-D performance of innovative groups to combine the theoretical illustrative function of economics and the relative management methodology perfectly, and demonstrates the effectiveness of this method.

  14. Supply Chain Performance Evaluation: Trends and Challenges

    Directory of Open Access Journals (Sweden)

    Ezutah U. Olugu

    2009-01-01

    Full Text Available Problem statement: In today’s manufacturing world, globalization policies and rejuvenation have created a more intensive competition amongst manufacturers. On the other hand, manufacturers have turned to the option of adopting innovative technologies, process re-engineering and strategies such as efficient supply chain management to achieve a sustainable competitive advantage. Effective supply chain performance measurement has been identified as a key issue towards efficient supply chain management. To explore the extent of research in supply chain performance measurement and establish the gap in knowledge in supply chain performance measurement using fuzzy logic operation. Approach: Literatures in the area of supply chain performance measurement had been extensively reviewed. Both traditional and fuzzy logic approaches to supply chain performance measurement were scrutinized. Further scrutiny was carried out to establish potential research areas in the application of fuzzy logic operations in supply chain performance measurement. Results: The supply chain performance measurement using fuzzy logic operation was identified as a new direction in measuring the uncertainty and ambiguity surrounding supply chain performance measurement. Direction for further studies in the application of fuzzy logic operation in supply chain management and its performance measurement were also identified. Conclusion: Result of this study implied that there is still a gap in knowledge in the area of supply chain performance measurement. This new direction of studies involved extending the existing supply chains to incorporate product recovery after the useful life.

  15. A key performance measures for evaluating cold supply chain performance in farm industry

    Directory of Open Access Journals (Sweden)

    Shashi Shashi

    2015-08-01

    Full Text Available The main objective of this study was to develop a set of measures, evaluate their importance and effect in cold supply chain performance. This investigation reviewed previous research works on all the stages of the farm product supply chain. Based on farm product supply chain, 4 measures with 31 metrics were identified and developed to measure the cold supply chain performance. A survey was organized to establish the importance and the effect of identified measures. The 5 point Likert scale questionnaire was distributed among SC academics and practitioners. The observed finding infers that the measurement instrument was substantiating for evaluating cold supply chain performance in farm industry. The new developed metrics will help firms improve the visibility of supply among partners and in better decision making. The investigation was enfolded up through the plan of direction intended for future study.

  16. 可持续发展视阈下企业绩效BSC-AHP-FCE评价研究%The Research on BSC-AHP-FCE Evaluation of Enterprise Performance Based on Sustainable Development

    Institute of Scientific and Technical Information of China (English)

    霍江林; 刘素荣

    2012-01-01

    结合我国企业绩效评价的发展需要,按照可持续发展战略的要求,结合平衡计分卡的四维指导思想,改进平衡计分卡的结构内容,从持续增长财务、相关利益反映、QHSE运营流程、持续创新能力四个维度构建绩效评价指标体系,运用层次分析法确定指标递阶层次结构和权重,构建模糊综合评价模型,分层次进行模糊综合评价,并针对样本企业展开实例应用。%At present, the concept of sustainable development has been integrated into enterprise manage- ment level, but specific performance evaluation still needs to continuously explore. Combined with the needs of enterprise performance evaluation in our country, and reference to previous research, according to the require- ments of the sustainable development strategy, based on BSC(the Balanced Score Card)four-dimensional guiding ideology, improve the structure of Balanced Scorecard, establish performance evaluation index system comprising of the continued growth in financial, related interests reflected, QHSE operational processes and continuous in- novation. And apply AHP to determine the indicators structure and weights, then constuct fuzzy comprehensive evaluation model, proceed hierarchical fuzzy comprehensive evaluation, and an application example analysis.

  17. Green Building Supply Chain Performance Evaluation Based on Improved BSC Method%基于改进型BSC法绿色建筑供应链绩效评价研究

    Institute of Scientific and Technical Information of China (English)

    陈伟伟; 张云宁; 欧阳红祥

    2014-01-01

    In order to improve the performance evaluation of green supply chain,this paper analyzed the characteristics of the supply chain of green building,and built performance evaluation index system based on the improved balanced scorecard model. Using SPSS13.0 software, indicators dimensions are reduced by principal component analysis. Combining with genetic algorithm, the paper adopted uncertain AHP method to establish an objective optimization model to calculate the final results of the evaluation. Then, the model was applied into a specific case,and more accurate and objective evaluation results were obtained. This paper provides a useful perspective for the green supply chain performance evaluation and continuous improvement in construction enterprises.%为了提高绿色建筑供应链绩效评价的科学合理性和可操作性,分析了绿色建筑供应链的概念及特点,基于改进型BSC模式构建绩效评价指标体。提出了通过SPSS软件对指标体系主成分分析以降低指标维度,基于不确定层次分析法建立目标优化模型,结合遗传算法对绿色建筑供应链进行综合评价。并将建立的模型和算法应用到算例中,得出更加准确、客观的评价结果。为建筑业企业进行绿色供应链绩效评价和持续改进提供了有益的视角,具有重要的理论指导意义和现实应用价值。

  18. 挣时管理:一种基于挣值的项目进度绩效评价方法%Earned time:a new optimal method of project schedule performance evaluation based on earned value

    Institute of Scientific and Technical Information of China (English)

    郭文静; 周晓宏

    2014-01-01

    The Earned Value Management methodology is a very important and systematic technique that evaluates project performance.This paper studies the disadvantages and limitations of traditional earned value method while evaluating the project Schedule Performance from the application point of view based on the introduction of the traditional earned value management method,and puts forward a performance evaluation method called Earned Time method.It corrects the deviation from traditional earned value method when evaluating the project Schedule Performance,and all the information needed comes form the traditional earned value management.%挣值管理方法是现代项目管理中评价项目绩效的一个非常重要的系统方法。本文在对传统挣值管理方法简要介绍基础上,从实际应用角度就传统挣值管理方法在项目进度绩效评价方面存在的不足和局限进行分析,提出了一种基于时间进度的进度绩效评价方法-挣时分析法。该方法能够改进传统挣值法在进度评价方面的偏差,而且该方法所有信息都来自传统挣值分析,不需要增加额外的信息。

  19. Modeling Academic Performance Evaluation Using Soft Computing Techniques: A Fuzzy Logic Approach

    Directory of Open Access Journals (Sweden)

    Ramjeet Singh Yadav

    2011-02-01

    Full Text Available We have proposed a Fuzzy Expert System (FES for student academic performance evaluation based on fuzzy logic techniques. A suitable fuzzy inference mechanism and associated rule has been discussed. It introduces the principles behind fuzzy logic and illustrates how these principles could be applied by educators to evaluating student academic performance. Several approaches using fuzzy logic techniques have been proposed to provide a practical method for evaluating student academic performance and compare the results (performance with existing tatistical method.

  20. 基于工作量年核算模式的医院绩效考核探讨%Study on Hospital Performance Evaluation Based on Yearly Cost Accounting Model of Workload

    Institute of Scientific and Technical Information of China (English)

    田玮

    2016-01-01

    目的:研究基于工作量核算模式的医院绩效考核模式,探究该绩效考核模式的应用效果。方法运用案例分析法,对该院基于工作量核算模式的绩效考核进行研讨。结果医院对于差异化的岗位要求以及风险把控要素进行划分核算,构建单独的基于工作量核算的绩效工资核算体系,加强服务成本管理,以调动医务人员工作积极性,提高医务人员工作效率,进而提升医院医疗服务质量。结论把量化后的科室(部门)质量考核控制关键以及考核指数作为目标管理的重要组织要素。%Objective To research the hospital performance evaluation model based on cost accounting model of workload and study the application effect of this performance evaluation model. Methods We researched and discussed the perfor-mance evaluation based on cost accounting model of workload of our hospital by the case analysis method. Results The dif-ferentiated jib requirements and risk control factors were given division and accounting, the single performance salary ac-counting system based on workload was built up and the service cost management was enhanced in order to motivate the work enthusiasm of medical staff and improve the work efficiency of medical staff thus improving the medical service quality of hospitals. Conclusion Department quality evaluation control key after quantization and evaluation index are used as the important organizational elements of objective management.

  1. Staff Performance Evaluation in Public Organizations

    Directory of Open Access Journals (Sweden)

    Drumea C.

    2014-12-01

    Full Text Available In public Organizations staff performance is difficult to measure in absence of overall quantitative performance indicators. There are also the qualitative indicators that give an overview on staff’s motivation, strive, ability, commitment to values, teamwork. These aspects are even less easy to illustrate, in private and public sectors equally. In both cases, measuring staff performance at work, as well as its input on the global performance of the organization is a difficult task which has in practice different approaches. Subsequently, this paper is discussing the system indicators and performance triggers used in International Organizations UN affiliated, in order to adjust staff classification and benefits to their staff’s performance.

  2. CEO turnover and relative performance evaluation

    OpenAIRE

    Jenter, Dirk; Kanaan, Fadi

    2015-01-01

    This paper examines whether CEOs are fired after bad firm performance caused by factors beyond their control. Standard economic theory predicts that corporate boards filter out exogenous industry and market shocks to firm performance when deciding on CEO retention. Using a new hand-collected sample of 1,590 CEO turnovers from 1993 to 2001, we document that CEOs are significantly more likely to be dismissed from their jobs after bad industry and bad market performance. A decline in the industr...

  3. 基于平衡记分卡的村集体组织绩效评价可行性分析%Feasibility Analysis on Performance Evaluation of Rural Collective Organizations Based on Balanced Score Card

    Institute of Scientific and Technical Information of China (English)

    冯江涛

    2011-01-01

    结合平衡记分卡及村集体组织的特征,从3个方面对平衡记分卡应用于村集体组织绩效评价进行了可行性分析,并指出了其应用中的两个关键注意点.%Combining with the characteristics of balanced score card and rural collective organizations, the paper took feasibility analysis on the performance evaluation of rural collective organizations based on balanced score card from 3 aspects, and pointed out two key attention points in its application.

  4. Single-Sex Teaching in a Co-educational Comprehensive School in England: An Evaluation Based Upon Students' Performance and Classroom Interactions.

    Science.gov (United States)

    Younger, Mike; Warrington, Molly

    2002-01-01

    Focuses on single-sex teaching in co-educational schools, using a case study of a school where single-sex teaching has been the norm. Analyzes student performance since General Certificate of Secondary Education began. Finds girls have consistently achieved better results than boys in most subjects, but both sexes showed relative improvement. (BT)

  5. Performance Evaluation of CRW Reef-Scale and Broad-Scale SST-Based Coral Monitoring Products in Fringing Reef Systems of Tobago

    OpenAIRE

    Shaazia S. Mohammed; Heron, Scott F.; Rajindra Mahabir; Ricardo M. Clarke

    2015-01-01

    Satellite-derived sea surface temperature (SST) is used to monitor coral bleaching through the National Oceanic and Atmospheric Administration’s Coral Reef Watch (CRW) Decision Support System (DSS). Since 2000, a broad-scale 50 km SST was used to monitor thermal stress for coral reefs globally. However, some discrepancies were noted when applied to small-scale fringing coral reefs. To address this, CRW created a new DSS, specifically targeted at or near reef scales. Here, we evaluated the new...

  6. Evaluating Judicial Performance and Addressing Gender Bias

    Directory of Open Access Journals (Sweden)

    Angela Melville

    2014-12-01

    Full Text Available Elek and Rottman argue that judicial evaluation is often biased against women and minority judges. The need to address bias is important, however often the desire for diversity seems so self-evident as to belie deeper analysis. This paper examines the two main rationales for gender equality on the bench. First, female judges are often considered necessary in order to bring a gendered perspective to judging, however it is argued that this rationale is flawed. Second, an alternative rationale based on equality and legitimacy is offered which avoids gender essentialism. While debates typically focus on these two rationales, a third rationale embraces both difference and equality/legitimacy. The presence of female judges has an important symbolic value which destabilises existing fraternal legal norms. Finally, increasing the number of female judges may not necessarily change judging, and this paper also analyses how the transformative potential offered by judicial diversity can work in practice. Elek y Rottman defienden que la evaluación judicial suele estar sesgada en contra de las mujeres y los jueces pertenecientes a minorías. La necesidad de abordar el sesgo es importante, sin embargo a menudo el deseo de diversidad parece tan evidente como para contradecir un análisis más profundo. Este artículo examina los dos motivos principales para la igualdad de género en el banquillo. En primer lugar, las mujeres jueces a menudo se consideran necesarias para aportar una perspectiva de género al hecho de juzgar, sin embargo, se defiende que este razonamiento es erróneo. En segundo lugar, se ofrece una alternativa lógica basada en la igualdad y la legitimidad que evita el esencialismo de género. Mientras que los debates suelen centrarse en estas dos razones, una tercera justificación abarca tanto la diferencia como la igualdad/legitimidad. La presencia de mujeres en la judicatura tiene un importante valor simbólico que desestabiliza las normas

  7. Dynamic Comprehensive Evaluation of the Performance Appraisal of the Life Insurance Companies Based on Projection Pursuit Method%基于投影寻踪的寿险公司绩效动态综合评价

    Institute of Scientific and Technical Information of China (English)

    李春红; 刘琳; 卢玉桂

    2013-01-01

    针对寿险公司绩效评价指标多、维数高、指标权重的确定不够客观等行业特点,将解决高维问题的投影寻踪方法运用于寿险公司绩效综合评价中,建立了基于加速遗传算法的投影寻踪寿险公司绩效综合评价模型.通过对24家寿险公司2007-2010年的绩效状况进行评价,验证了该方法的可行性和时序动态评价的必要性.为寿险公司绩效评价提供了一个新的技术手段和研究视角,也为评判保险公司绩效提供了一种有效的方法.%As to the problems of various evaluation indices, high dimension, and the unobjective determination of index weight etc. In the performance evaluation of life insurance company, this article tries to apply the Projection Pursuit Method to the comprehensive evaluation of the performance appraisal of the life insurance companies which can resolve the high-dimension problem. It establishes projection pursuit method based on real-coded accelerating genetic algorithm and uses the method to e-valuate the life insurance company performance comprehensively. The model is used to analyze the performance of 24 life insurance companies from 2007 to 2010. The evaluation result shows that the feasibility of this method and the assessment in time series is very important. The research provides a technical means and a fire-new angle of view for the performance appraisal of the life insurance companies , and provides an effective method choice to appraise performance of the insurance companies.

  8. 基于熵权灰靶理论的港口物流绩效评价%A Port Logistics Performance Evaluation Based on Entropy Gray Target Theory

    Institute of Scientific and Technical Information of China (English)

    黄永燊; 蒋恵园

    2015-01-01

    为了弥补传统物流绩效评价方法只给出综合评价值的不足,在构建港口物流绩效评价指标体系的基础上,结合熵值法和灰靶理论建立了熵权灰靶理论模型,运用该模型对港口物流绩效水平进行实证分析。研究结果表明:2011年上海港物流绩效水平最优,其次是天津港、青岛港、宁波港、广州港和大连港,熵权灰靶理论用于港口物流绩效评价是切实可行的。该理论在丰富港口物流绩效评价方法的同时,为今后提高港口物流服务水平提供相应的参考依据。%In order to make up for the shortcomings that traditional logistics evaluation method only gives the comprehensive evaluation value, after constructing the port logistics performance evaluation index sys-tem, an entropy gray target theory model is established based on gray target theory and entropy method.An empirical analysis of port logistics performance level is conducted by using this model.The results show that Shanghai Port logistics performance level is optimal in 2011, followed by Tianjin Port, Qingdao Port, Ningbo Port, Guangzhou Port and Dalian Port, and the entropy gray target theory is feasible in port logis-tics performance evaluation.This theory not only enriches the port logistics performance evaluation meth-ods, but also provides corresponding reference to improving the port logistics performance level in the fu-ture.

  9. Performance Evaluation of Coded Meshed Networks

    DEFF Research Database (Denmark)

    Krigslund, Jeppe; Hansen, Jonas; Pedersen, Morten Videbæk;

    2013-01-01

    We characterize the performance of intra- and inter-session network coding (NC) in wireless networks using real-life implementations. We compare this performance to a recently developed hybrid approach, called CORE, which combines intra- and inter-session NC exploiting the code structure...

  10. Performance evaluation of enterprise architecture using fuzzy sequence diagram

    Directory of Open Access Journals (Sweden)

    Mohammad Atasheneh

    2014-01-01

    Full Text Available Developing an Enterprise Architecture is a complex task and to control the complexity of the regulatory framework we need to measure the relative performance of one system against other available systems. On the other hand, enterprise architecture cannot be organized without the use of a logical structure. The framework provides a logical structure for classifying architectural output. Among the common architectural framework, the C4ISR framework and methodology of the product is one of the most popular techniques. In this paper, given the existing uncertainties in system development and information systems, a new version of UML called Fuzzy-UML is proposed for enterprise architecture development based on fuzzy Petri nets. In addition, the performance of the system is also evaluated based on Fuzzy sequence diagram.

  11. Evaluation of Mosix—Linux Farm Performances in GRID Environment

    Institute of Scientific and Technical Information of China (English)

    F.Barone; M.DERose; 等

    2001-01-01

    The MOSIX extensions to the Linux Operating System allow the creation of high-performance Linux Farms and an excellent integration of the several CPUs of the Farm,whose computational power can be furtherly inereased and made more effective by netorking them within the GRID environment .Following this strategy,we started to perform computational tests using two independent farrms within the GRID environment.In particular,we performed a preliminary evaluation of the distributed computing efficiency with a MOSIX Linux farm in the simulation of gravitational waves data analysis from coalescing binaries.To this task,two different techniques were compared.the classical matched filters technique and one of its possible evolutions,based on a global optimisation technique.

  12. ECG compression: evaluation of FFT, DCT, and WT performance.

    Science.gov (United States)

    GholamHosseini, H; Nazeran, H; Moran, B

    1998-12-01

    This work investigates a set of ECG data compression schemes to compare their performances in compressing and preparing ECG signals for automatic cardiac arrhythmia classification. These schemes are based on transform methods such as fast Fourier transform (FFT), discrete cosine transform (DCT), wavelet transform (WT), and their combinations. Each specific transform is applied to a pre-selected data segment from the MIT-BIH database and then compression is performed in the new domain. These transformation methods are known as an important class of ECG compression techniques. The WT has been shown as the most efficient method for further improvement. A compression ratio of 7.98 to 1 has been achieved with a percent of root mean square difference (PRD) of 0.25%, indicating that the wavelet compression technique offers the best performance over the other evaluated methods.

  13. EVALUATION OF HOTEL SERVICE-PERFORMANCE PROCESS IN BULGARIA

    Directory of Open Access Journals (Sweden)

    Georgina Lukanova

    2010-06-01

    Full Text Available The paper analyses the hotel service-performance process in Bulgarian hotels, which is based on the results of the research about tourists’ opinion on basic moments in service process. One of the most important characteristics of hotel industry is the leading role of the human factor in service-performance process. It cannot be accomplished without the participation of the customer and without the participation of the staff.This makes the evaluation of service process strongly subjective. Because of this, customer needs satisfaction is a big challenge for the hotel management. Under the present conditions of an increased competition, satisfying customers means offering service-performance process, which not only meets, but also exceeds guests’expectations. This can be achieved by a preliminary study of their requirements and expectations.

  14. Quantitative and chemical fingerprint analysis for the quality evaluation of Isatis indigotica based on ultra-performance liquid chromatography with photodiode array detector combined with chemometric methods.

    Science.gov (United States)

    Shi, Yan-Hong; Xie, Zhi-Yong; Wang, Rui; Huang, Shan-Jun; Li, Yi-Ming; Wang, Zheng-Tao

    2012-01-01

    A simple and reliable method of ultra-performance liquid chromatography with photodiode array detector (UPLC-PDA) was developed to control the quality of Radix Isatidis (dried root of Isatis indigotica) for chemical fingerprint analysis and quantitative analysis of eight bioactive constituents, including R,S-goitrin, progoitrin, epiprogoitrin, gluconapin, adenosine, uridine, guanosine, and hypoxanthine. In quantitative analysis, the eight components showed good regression (R > 0.9997) within test ranges, and the recovery method ranged from 99.5% to 103.0%. The UPLC fingerprints of the Radix Isatidis samples were compared by performing chemometric procedures, including similarity analysis, hierarchical clustering analysis, and principal component analysis. The chemometric procedures classified Radix Isatidis and its finished products such that all samples could be successfully grouped according to crude herbs, prepared slices, and adulterant Baphicacanthis cusiae Rhizoma et Radix. The combination of quantitative and chromatographic fingerprint analysis can be used for the quality assessment of Radix Isatidis and its finished products.

  15. Experimental Evaluation of the Effects of Dynamic Pressure on Improving Cement-based Grout Penetrability : A study performed with the short slot

    OpenAIRE

    Mentesidis, Anastasios

    2015-01-01

    The increasing need for watertight underground works, such as tunnel excavations, has sparked an interest in a number of research studies with grout penetrability being the focus. The research has so far contributed to a deeper understanding regarding the assessment of a successful grouting operation from different perspectives such as choice of equipment, material properties, phase planning and performance.  It is well established that several crucial factors influence the penetrability of g...

  16. Techno-economic performance evaluation of direct steam generation solar tower plants with thermal energy storage systems based on high-temperature concrete and encapsulated phase change materials

    Science.gov (United States)

    Guédez, R.; Arnaudo, M.; Topel, M.; Zanino, R.; Hassar, Z.; Laumert, B.

    2016-05-01

    Nowadays, direct steam generation concentrated solar tower plants suffer from the absence of a cost-effective thermal energy storage integration. In this study, the prefeasibility of a combined sensible and latent thermal energy storage configuration has been performed from thermodynamic and economic standpoints as a potential storage option. The main advantage of such concept with respect to only sensible or only latent choices is related to the possibility to minimize the thermal losses during system charge and discharge processes by reducing the temperature and pressure drops occurring all along the heat transfer process. Thermodynamic models, heat transfer models, plant integration and control strategies for both a pressurized tank filled with sphere-encapsulated salts and high temperature concrete storage blocks were developed within KTH in-house tool DYESOPT for power plant performance modeling. Once implemented, cross-validated and integrated the new storage model in an existing DYESOPT power plant layout, a sensitivity analysis with regards of storage, solar field and power block sizes was performed to determine the potential impact of integrating the proposed concept. Even for a storage cost figure of 50 USD/kWh, it was found that the integration of the proposed storage configuration can enhance the performance of the power plants by augmenting its availability and reducing its levelized cost of electricity. As expected, it was also found that the benefits are greater for the cases of smaller power block sizes. Specifically, for a power block of 80 MWe a reduction in levelized electricity costs of 8% was estimated together with an increase in capacity factor by 30%, whereas for a power block of 126 MWe the benefits found were a 1.5% cost reduction and 16% availability increase.

  17. 48 CFR 1536.201 - Evaluation of contracting performance.

    Science.gov (United States)

    2010-10-01

    ... Contracting for Construction 1536.201 Evaluation of contracting performance. (a) The Contracting Officer will... will file the form in the contractor performance evaluation files which it maintains. (e) The Quality... 48 Federal Acquisition Regulations System 6 2010-10-01 2010-10-01 true Evaluation of...

  18. 48 CFR 36.201 - Evaluation of contractor performance.

    Science.gov (United States)

    2010-10-01

    ... Contracting for Construction 36.201 Evaluation of contractor performance. See 42.1502(e) for the requirements for preparing past performance evaluations for construction contracts. ... 48 Federal Acquisition Regulations System 1 2010-10-01 2010-10-01 false Evaluation of...

  19. 48 CFR 2936.201 - Evaluation of contractor performance.

    Science.gov (United States)

    2010-10-01

    ... Construction 2936.201 Evaluation of contractor performance. The HCA must establish procedures to evaluate... 48 Federal Acquisition Regulations System 7 2010-10-01 2010-10-01 false Evaluation of contractor performance. 2936.201 Section 2936.201 Federal Acquisition Regulations System DEPARTMENT OF LABOR...

  20. Key performance indicators and companies logistic strategy evaluation

    OpenAIRE

    Galyna Tarasiuk; Oleg Rudkivskyi; Оlga Pohaydak

    2013-01-01

    In the article are proposed key performance indicators in company’s logistic strategy evaluation; defined a need to develop key performance indicators in company’s logistic strategy evaluation; disclosed the features of using key performance indicators in company’s logistic activity; proposed stages of key performance indicators system implementation in company’s logistic system; proposed use key performance indicators in accordance with the specific company’s logistic strategy (cost-oriented...