WorldWideScience

Sample records for handset performance evaluation

  1. Using Radiation Pattern Measurements for Mobile Handset Performance Evaluation

    DEFF Research Database (Denmark)

    Nielsen, Jesper Ødum; Pedersen, Gert Frølund

    2005-01-01

    The mean effective gain (MEG) is an attractive performance measure of mobile handsets, since it incorporates both directional and polarization properties of the handset and environment. In this work the MEG is computed from measured spherical radiation patterns of five different mobile handsets......, both in free space and including a human head & shoulder phantom. Different models of the environment allow a comparison of the MEG obtained for realistic models based on measurements with the total radiated power (TRP) and the total isotropic sensitivity (TIS). All the comparisons are based on the MEG...

  2. Mobile Handset Performance Evaluation Using Radiation Pattern Measurements

    DEFF Research Database (Denmark)

    Nielsen, Jesper Ødum; Pedersen, Gert Frølund

    2006-01-01

    The mean effective gain is an attractive performance measure of mobile handsets, since it incorporates both directional and polarization properties of the handset and environment. In this work the mean effective gain is computed from measured spherical radiation patterns of five different mobile...... handsets, both in free space and including a human head & shoulder phantom. Different models of the environment allow a comparison of the mean effective gain obtained for realistic models based on measurements with the total radiated power and the total isotropic sensitivity. All the comparisons are based...

  3. Correlation Evaluation on Small LTE Handsets

    DEFF Research Database (Denmark)

    Barrio, Samantha Caporal Del; Pedersen, Gert Frølund

    2012-01-01

    This paper presents measurements of the first MIMO handset on the market. It investigates the correlation coefficient computed from coaxial cable measurements and from optical fiber measurements. The results are compared and discussed. The question of the actual feasibility of low correlation...

  4. Changes in Handset Performance Measures due to Spherical Radiation Pattern Measurement Uncertainty

    DEFF Research Database (Denmark)

    Nielsen, Jesper Ødum; Pedersen, Gert Frølund

    An important characteristic of a mobile handset is its ability to receive and transmit power. One way to characterize the performance of a handset in this respect is to use measurements of the spherical radiation pattern from which the total radiated power (TRP), total isotropic sensitivity (TIS......), and mean effective gain (MEG) can be computed. Often this kind of measurements are made with a phantom head next to the handsets in order to simulate the influence of a real user. The measured radiation patterns are only expected to be repeatable if the same setup is used, i.e., the same phantom...... and the same mounting of the handset on the phantom. In this work the influence of mounting errors on the TRP, TIS, and MEG is investigated. Knowledge about the error due to incorrect mounting is necessary in determining requirements for both the mounting accuracy as well as for other parts of the measurement...

  5. Meandered Monopoles for 700 MHz LTE Handsets and Improved MIMO Channel Capacity Performance

    Directory of Open Access Journals (Sweden)

    I. Dioum

    2011-12-01

    Full Text Available In this paper, we present the design and the measurement of MIMO meandered monopole antennas and the computation of their channel capacity performance. The initial proposed handset-system is composed of a meandered monopole operating in the LTE 700 MHz band, connected to a parasitic radiating element for the upper 2.5 GHz LTE band. Two antennas of the same kind are then closely positioned on the same 120x50 mm2 Printed Circuit Board (PCB. A neutralization line connects the two antennas to enhance their port-to-port isolation in the 700 MHz band. The computation of the channel capacity performance in this band is based on propagation simulations performed with the GRIMM model from the CREMANT. Two system-prototypes are evaluated: one with the neutralization line for enhanced port-to-port isolation and a second without the neutralization exhibiting poor antenna-to-antenna isolation. It is demonstrated that the neutralization technique helps in giving a minimum improvement of 12% of the capacity performance of the handset-system, and a maximum improvement 46%, in the chosen environment.

  6. Channel Models for Capacity Evaluation of MIMO Handsets in Data Mode

    DEFF Research Database (Denmark)

    Nielsen, Jesper Ødum; Yanakiev, Boyan; Barrio, Samantha Caporal Del;

    2017-01-01

    This work investigates different correlation based models useful for evaluation of outage capacity (OC) of mobile multiple-input multiple-output (MIMO) handsets. The work is based on a large measurement campaign in a micro-cellular setup involving two dual-band base stations, 10 different handsets...... in an indoor environment for different use cases and test users. Several models are evaluated statistically, comparing the OC values estimated from the model and measurement data, respectively, for about 2,700 measurement routes. The models are based on either estimates of the full correlation matrices...... or simplifications. Among other results, it is shown that the OC can be predicted accurately (median error typically within 2.6%) with a model assuming knowledge only of the Tx-correlation coefficient and the mean power gain....

  7. Maximum Likelihood A Priori Knowledge Interpolation-Based Handset Mismatch Compensation for Robust Speaker Identification

    Institute of Scientific and Technical Information of China (English)

    LIAO Yuanfu; ZHUANG Zhixian; YANG Jyhher

    2008-01-01

    Unseen handset mismatch is the major source of performance degradation in speaker identifica-tion in telecommunication environments.To alleviate the problem,a maximum likelihood a priori knowledge interpolation (ML-AKI)-based handset mismatch compensation approach is proposed.It first collects a set of handset characteristics of seen handsets to use as the a priori knowledge for representing the space of handsets.During evaluation the characteristics of an unknown test handset are optimally estimated by in-terpolation from the set of the a pdod knowledge.Experimental results on the HTIMIT database show that the ML-AKI method can improve the average speaker identification rate from 60.0% to 74.6% as compared with conventional maximum a posteriori-adapted Gaussian mixture models.The proposed ML-AKI method is a promising method for robust speaker identification.

  8. Influence of Spherical Radiation Pattern Measurement Uncertainty on Handset Performance Measures

    DEFF Research Database (Denmark)

    Nielsen, Jesper Ødum; Pedersen, Gert Frølund

    2005-01-01

    and the same mounting of the handset on the phantom. In this work the influence of mounting errors on the TRP, TIS, and MEG is investigated. Knowledge about the error due to incorrect mounting is necessary in determining requirements for both the mounting accuracy as well as for other parts of the measurement...... in the performance measures are investigated for both the GSM-900 and the GSM-1800 band. Despite the deliberately large deviations from the reference position, the changes in TRP and TIS are generally within ±0.5 dB with a maximum of about 1.4 dB. For the MEG values the results depend on the orientation...

  9. A Novel Cellular Handset Design for an Enhanced Antenna Performance and a Reduced SAR in the Human Head

    Directory of Open Access Journals (Sweden)

    Salah I. Al-Mously

    2008-01-01

    Full Text Available This paper presents a novel cellular handset design with a bottom-mounted short loaded-whip antenna. This new handset design is modeled and simulated using a finite difference time-domain (FDTD-based platform SEMCAD. The proposed handset is based on a current commercially available bar-phone type with a curvature shape, keypad positioned above the screen, and top-mounted antenna. The specific absorption rates (SARs are determined computationally in the specific anthropomorphic mannequin (SAM and anatomically correct model of a human head when exposed to the EM-field radiation of the proposed cellular handset and the handset with top-mounted antenna. The two cellular handsets are simulated to operate at both GSM standards, 900 MHz as well as 1800 MHz, having different antenna dimensions and intput power of 0.6 W and 0.125 W, respectively. The proposed human hand holding the two handset models is a semirealistic hand model consists of three tissues: skin, muscle, and bone. The simulations are conducted with handset positions based on the IEEE standard 1528-2003. The results show that the proposed handset has a significant improvement of antenna efficiency when it is hand-held close to head, as compared with the handset of top-mounted antenna. Also, the results show that a significant reduction of the induced SAR in the human head-tissues can be achieved with the proposed handset.

  10. User Effect on the MIMO Performance of a Dual Antenna LTE Handset

    DEFF Research Database (Denmark)

    Buskgaard, Emil Feldborg; Tatomirescu, Alexandru; Barrio, Samantha Caporal Del

    2014-01-01

    phantom using a commercially available Finite Element Method solver. The MIMO parameters are evaluated with three different channel models. A static grip only gives one case of the user effect so the hand phantom is modified with a moving finger that is swept across the backplane of the phone. Based...

  11. Experimental investigation of a dual-band handset MIMO antenna using a spatial fading emulator

    DEFF Research Database (Denmark)

    Sakata, Tsutomu; Yamamoto, Atsushi; Hayashi, Toshiteru

    2010-01-01

    An experimental investigation of handset MIMO antennas with dual-band operation was performed using the data from a radio propagation test in an urban area of Aalborg city in Denmark and an over-the-air test using a spatial fading emulator. It is concluded from the agreement between MIMO characte......An experimental investigation of handset MIMO antennas with dual-band operation was performed using the data from a radio propagation test in an urban area of Aalborg city in Denmark and an over-the-air test using a spatial fading emulator. It is concluded from the agreement between MIMO...... characteristics of the both measurements that the emulator is effective in evaluating handset MIMO arrays in the case of a multipath fading environment with one spatial cluster at 776 MHz and 2.35 GHz....

  12. Tunable Handset Antenna

    DEFF Research Database (Denmark)

    Barrio, Samantha Caporal Del; Foroozanfard, Ehsan; Morris, Art

    2017-01-01

    With the future LTE auction for TV white spaces at 600 MHz, there is a strong need for efficient handset antennas operating at very low frequencies. This paper shows a tunable antenna covering the LTE bands from 600 MHz to 2.6 GHz. The antenna uses state-of-the-art MEMS tunable capacitors in order...... to reconfigure its operating frequency. In this work, the design mitigates the tuning loss with a tunable extended ground plane. The resulting dual-resonant antenna exhibits a peak total efficiency of -3.9 dB at 600 MHz....

  13. Outdoor Urban Propagation Experiment of a Handset MIMO Antenna with a Human Phantom located in a Browsing Stance

    DEFF Research Database (Denmark)

    Yamamoto, Atsushi; Hayashi, Toshiteru; Ogawa, Koichi;

    2007-01-01

    Outdoor radio propagation experiments are presented at 2.4 GHz, using a handset MIMO antenna with two monopoles and two planar inverted-F antennas (PIFAs), adjacent to a human phantom in browsing stance. The propagation test was performed in an urban area of a city, which resulted in non lineof......-sight (NLOS) situations. In our investigation, the 4-by-4 MIMO and SISO channel capacities for the reception signals were evaluated. These measurements show that the handset MIMO antenna, close to the human operator, is capable of MIMO reception....

  14. Handsets Malware Threats and Facing Techniques

    CERN Document Server

    Elfattah, Marwa M A; Sarhan, Ebada

    2012-01-01

    Nowadays, mobile handsets combine the functionality of mobile phones and PDAs. Unfortunately, mobile handsets development process has been driven by market demand, focusing on new features and neglecting security. So, it is imperative to study the existing challenges that facing the mobile handsets threat containment process, and the different techniques and methodologies that used to face those challenges and contain the mobile handsets malwares. This paper also presents a new approach to group the different malware containment systems according to their typologies.

  15. An empirical research of university students’ handset reading behavior

    Institute of Scientific and Technical Information of China (English)

    Yihong; MAO

    2011-01-01

    The author carried out an investigative survey by way of random sampling college students’ handset reading behavior at 10 universities in Nanjing. It was hoped that through such an undertaking and accompanied it with a scientific analysis of the collected data, we may gain a better understanding about the present handset reading situation of Chinese college students in general and the characteristics of the students’ handset reading behavior such as their needs of handset reading, their access techniques to handset reading,and their level of sophistication of handset reading utilization, etc. in particular. Based on his research findings, the author concludes his paper with a calling to those handset reading service providers, such as university library administrators and library and information professionals to strive for further professional advancement for their handset based information service delivery operation.

  16. Assessment of specific energy absorption rate (SAR) in the head from a TETRA handset

    Science.gov (United States)

    Dimbylow, Peter; Khalid, Mohammed; Mann, Simon

    2003-12-01

    Finite-difference time-domain (FDTD) calculations of the specific energy absorption rate (SAR) from a representative TETRA handset have been performed in an anatomically realistic model of the head. TETRA (Terrestrial Trunked Radio) is a modern digital private mobile radio system designed to meet the requirements of professional users, such as the police and fire brigade. The current frequency allocations in the UK are 380-385 MHz and 390-395 MHz for the public sector network. A comprehensive set of calculations of SAR in the head was performed for positions of the handset in front of the face and at both sides of the head. The representative TETRA handset considered, operating at 1 W in normal use, will show compliance with both the ICNIRP occupational and public exposure restrictions. The handset with a monopole antenna operating at 3 W in normal use will show compliance with both the ICNIRP occupational and public exposure restrictions. The handset with a helical antenna operating at 3 W in normal use will show compliance with the ICNIRP occupational exposure restriction but will be over the public exposure restriction by up to ~50% if kept in the position of maximum SAR for 6 min continuously.

  17. Mobile Handsets from the Bottom Up

    DEFF Research Database (Denmark)

    Wallis, Cara; Linchuan Qiu, Jack; Ling, Richard

    2013-01-01

    of mobile phone cards and accessories as well as various types of handsets, including some that flash with disco lights to signal an incoming call or that bear a “Mi-Obama” label with the slogan “Yes We Can.” Workers fix broken phones, construct bastardized phones out of mismatched parts, and sell phones...

  18. Future Vogues in Handset Antenna Systems

    DEFF Research Database (Denmark)

    Pelosi, Mauro; Pedersen, Gert Frølund

    2011-01-01

    This paper exemplifies future trends in handset antenna systems, contextualizing their historical evolution and anticipating novel paradigms. It is shown through numerical simulations how narrow-band antennas used in transceiver separation mode can reduce the total loss in presence of the user...

  19. Future Vogues in Handset Antenna Systems

    DEFF Research Database (Denmark)

    Pelosi, Mauro; Pedersen, Gert Frølund

    2011-01-01

    This paper exemplifies future trends in handset antenna systems, contextualizing their historical evolution and anticipating novel paradigms. It is shown through numerical simulations how narrow-band antennas used in transceiver separation mode can reduce the total loss in presence of the user......’s hand, improving at the same time the antenna isolation....

  20. Anticipated Impact of In-Car Mobile Calls on the Electromagnetic Interaction of Handset Antenna and Human

    OpenAIRE

    Salah I. Yahya

    2014-01-01

    This paper investigates the impact of the in-car mobile call on the electromagnetic interaction of the mobile handset antenna and user’s head. This impact was evaluated from two different perspectives; First, the antenna performance, e.g., total isotropic sensitivity and total efficiency, and second, the specific absorption rate (SAR) induced in the user's head. A Yee-FDTD based electromagnetic solver was used to simulate a mobile phone in hand close proximity to head at cheek and tilt positi...

  1. The properties of human body phantoms used in calculations of electromagnetic fields exposure by wireless communication handsets or hand-operated industrial devices.

    Science.gov (United States)

    Zradziński, Patryk

    2013-06-01

    According to international guidelines, the assessment of biophysical effects of exposure to electromagnetic fields (EMF) generated by hand-operated sources needs the evaluation of induced electric field (E(in)) or specific energy absorption rate (SAR) caused by EMF inside a worker's body and is usually done by the numerical simulations with different protocols applied to these two exposure cases. The crucial element of these simulations is the numerical phantom of the human body. Procedures of E(in) and SAR evaluation due to compliance analysis with exposure limits have been defined in Institute of Electrical and Electronics Engineers standards and International Commission on Non-Ionizing Radiation Protection guidelines, but a detailed specification of human body phantoms has not been described. An analysis of the properties of over 30 human body numerical phantoms was performed which has been used in recently published investigations related to the assessment of EMF exposure by various sources. The differences in applicability of these phantoms in the evaluation of E(in) and SAR while operating industrial devices and SAR while using mobile communication handsets are discussed. The whole human body numerical phantom dimensions, posture, spatial resolution and electric contact with the ground constitute the key parameters in modeling the exposure related to industrial devices, while modeling the exposure from mobile communication handsets, which needs only to represent the exposed part of the human body nearest to the handset, mainly depends on spatial resolution of the phantom. The specification and standardization of these parameters of numerical human body phantoms are key requirements to achieve comparable and reliable results from numerical simulations carried out for compliance analysis against exposure limits or within the exposure assessment in EMF-related epidemiological studies.

  2. The Study of Polarizing Brands in Iran Mobile Handset Market

    Directory of Open Access Journals (Sweden)

    Arman Ahmadizad

    2016-01-01

    Full Text Available In recent years, the brand has been known widely as an important element to ensure achievement for Business and companies. This paper aims to study the polarizing brands in Iran mobile handset market. Statistic society includes all of customers of 10 active brands in Sanandaj mobile handset market and 299 questionnaires were gathered as a sample. The finding identify that overall attitude was positive. Also, The results obtained show that the brands of LG, Lenovo, Apple, Sony, Samsung,HTC, Huawei,Nokia and Sony Ericsson were positive but Customers of GLX didn’t have a good attitude . Finally, several policies are made for improving brand attitude and loyalty that create value for Mobile Handset brands.

  3. 78 FR 6835 - Certain Mobile Handset Devices and Related Touch Keyboard Software; Institution of Investigation

    Science.gov (United States)

    2013-01-31

    ... COMMISSION Certain Mobile Handset Devices and Related Touch Keyboard Software; Institution of Investigation... importation, and the sale within the United States after importation of certain mobile handset devices and... the sale within the United States after importation of certain mobile handset devices and...

  4. VLSI Structure for an All Digital Receiver for CDMA PABX Handset

    Institute of Scientific and Technical Information of China (English)

    ZhouShidong; BiGuangguo

    1995-01-01

    In this paper,a VLSI architecture of a CDMA receiver is put forward for wirelesss PABX handset.To meet the critically low cost and power consumption requirement with neglectable per-formance degradation,some new techniques are employed to reduce hardware complexity,including base band processing,chip-rate sampling,low ADC resolution,absolute value detector,double branch acquisition ,and modified carrier phase compensation.Performance of experimental system fits well with theoretical predition ,and the practical SNR lose compared with ideal reception is about 2-3dB.

  5. ZTE Cikey Wins the Best LTE Device/Handset Award

    Institute of Scientific and Technical Information of China (English)

    2012-01-01

    28 May 2012, Barcelona -- ZTE Corporation announced at the LTE World Summit 2012 that ZTE Cikey won the Best LTE Device/Handset award for its powerful user-access functions and for the way it has improved the mobile customer experience.

  6. Tunable Handset Antenna: Enhancing Efficiency on TV White Spaces

    DEFF Research Database (Denmark)

    Barrio, Samantha Caporal Del; Foroozanfard, Ehsan; Morris, Art

    2017-01-01

    With the future LTE auction for TV white spaces at 600 MHz, there is a strong need for efficient handset antennas operating at very low frequencies. This paper shows a tunable antenna covering the LTE bands from 600 MHz to 2.6 GHz. The antenna uses state-of-the-art MEMS tunable capacitors in orde...... to reconfigure its operating frequency. In this work, the design mitigates the tuning loss with a tunable extended ground plane. The resulting dual-resonant antenna exhibits a peak total efficiency of -3.9 dB at 600 MHz.......With the future LTE auction for TV white spaces at 600 MHz, there is a strong need for efficient handset antennas operating at very low frequencies. This paper shows a tunable antenna covering the LTE bands from 600 MHz to 2.6 GHz. The antenna uses state-of-the-art MEMS tunable capacitors in order...

  7. Channel Statistics for MIMO Handsets in Data Mode

    DEFF Research Database (Denmark)

    Nielsen, Jesper Ødum; Yanakiev, Boyan; Barrio, Samantha Caporal Del;

    2014-01-01

    The presented work is based on a large dual- band, dual-base outdoor-to-indoor multiple-input multiple- output (MIMO) channel measurement campaign, involving ten different realistic MIMO handsets, held in data mode by eight test users. Various different use cases (UCs) are measured. Statistics on...... on the channel capacity, mean effective gain (MEG), branch power ratio (BPR), and correlation coefficients between Rx, Tx, and cross-link channels are presented....

  8. Concentrated Ground Plane Booster Antenna Technology for Multiband Operation in Handset Devices

    Directory of Open Access Journals (Sweden)

    C. Picher

    2014-12-01

    Full Text Available The current demand in the handset antenna field requires multiband antennas due to the existence of multiple communication standards and the emergence of new ones. At the same time, antennas with reduced dimensions are strongly required in order to be easily integrated. In this sense, the paper proposes a compact radiating system that uses two non-resonant elements to properly excite the ground plane to solve the abovementioned shortcomings by minimizing the required Printed Circuit Board (PCB area while ensuring a multiband performance. These non-resonant elements are called here ground plane boosters since they excite an efficient mode of the ground plane. The proposed radiating system comprises two ground plane boosters of small dimensions of 5 mm x 5 mm x 5 mm. One is in charge of the low frequency region (0.824-0.960 GHz and the other is in charge of the high frequency region (1.710-2.170 GHz. With the aim of achieving a compact configuration, the two boosters are placed close to each other in a corner of the ground plane of a handset device (concentrated architecture. Several experiments related to the coupling between boosters have been carried out in two different platforms (barphone and smartphone, and the best position and the required matching network are presented. The novel proposal achieves multiband performance at GSM850/900/1800/1900 and UMTS.

  9. Mean Effective Gain for Data Mode Operation of Mobile Handsets with Users

    DEFF Research Database (Denmark)

    Nielsen, Jesper Ødum; Yanakiev, Boyan; Bonev, Ivan Bonev

    2010-01-01

    and 2300 MHz). The handsets were of different types (bar, clamshell, pda), all had two antennas and were used in data (browsing) mode. All handsets were measured with twelve different users with both one-hand and two-hand grips. The body loss, the mean difference between the MEG in free space......The current paper presents statistics on the mean effective gain (MEG) for mobile handsets. The results are based on a large measurement campaign in an urban environment where the propagation channel from two different base sta- tions to seven different handsets were measured in two bands (776 MHz...

  10. User Influence on the Mean Effective Gain for Data Mode Operation of Mobile Handsets

    DEFF Research Database (Denmark)

    Nielsen, Jesper Ødum; Yanakiev, Boyan Radkov; Bonev, Ivan Bonev

    2012-01-01

    and 2300 MHz). The handsets were of different types (bar, clamshell, smartphone), all had two antennas and were used in data (browsing) mode. All handsets were measured with twelve different users with both one-hand and two-hand grips. The body loss, the mean difference between the MEG in free space......The current paper presents statistics on the mean effective gain (MEG) for mobile handsets. The results are based on a large measurement campaign in an urban environment where the propagation channel from two different base stations to seven different handsets were measured in two bands (776 MHz...

  11. Anticipated Impact of In-Car Mobile Calls on the Electromagnetic Interaction of Handset Antenna and Human

    Directory of Open Access Journals (Sweden)

    Salah I. Yahya

    2014-09-01

    Full Text Available This paper investigates the impact of the in-car mobile call on the electromagnetic interaction of the mobile handset antenna and user’s head. This impact was evaluated from two different perspectives; First, the antenna performance, e.g., total isotropic sensitivity and total efficiency, and second, the specific absorption rate (SAR induced in the user's head. A Yee-FDTD based electromagnetic solver was used to simulate a mobile phone in hand close proximity to head at cheek and tilt positions, and working at a frequency of 1900 MHz (GSM 1900/PCS while making a call inside a car. A Specific Anthropomorphic Mannequin (SAM was used to simulate the user’s head, a generic phone was used to simulate the mobile phone, a semi-realistic model with three tissues, i.e., skin, bone and muscle, was used to simulate the user’s hand, and a CAD model of Ferrari F430-brand was used to simulate the car. The results showed a considerable degradation in the mobile phone antenna performance while making a mobile phone call inside a car that may drive the mobile phone increases its radiated power to establish a successful connection with the base-station antenna, and consequently increases the induced specific absorption rate in the user’s head.

  12. 47 CFR 20.19 - Hearing aid-compatible mobile handsets.

    Science.gov (United States)

    2010-10-01

    ... 47 Telecommunication 2 2010-10-01 2010-10-01 false Hearing aid-compatible mobile handsets. 20.19... COMMERCIAL MOBILE RADIO SERVICES § 20.19 Hearing aid-compatible mobile handsets. (a) Scope of section... and Technology, Federal Communications Commission, 445 12th Street, SW., Washington, DC 20554. (5)...

  13. ATTRIBUTE BASED PERCEPTUAL MAPPING USING DISCRIMINANT ANALYSIS REGARDING SELECTED BRANDS OF MOBILE HANDSETS: AN EMPIRICAL INVESTIGATION IN HARYANA

    Directory of Open Access Journals (Sweden)

    Dr. Ashutosh Nigam

    2012-09-01

    Full Text Available Indian mobile handset industry has seen explosive growth backed by liberalization and heavy investment in the telecommunication infrastructure. With growth it becomes extremely important for mobile handset brands to position their brands properly. This paperattempts to know how customers perceive different brands of mobile handset in the light of attributes considered by consumers in making purchase decision. A questionnaire survey of 300 respondents was collected in Haryana. Discriminant analysis is used to draw perceptual maps showing selected mobile handset companies. The results showed that selected mobile handset brands do not differsignificantly with regard to given attributes.

  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. Malawi - Threshold Performance Evaluation

    Data.gov (United States)

    Millennium 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...

  16. 78 FR 70320 - Certain Mobile Handset Devices and Related Touch Keyboard Software; Commission Determination Not...

    Science.gov (United States)

    2013-11-25

    ... From the Federal Register Online via the Government Publishing Office INTERNATIONAL TRADE COMMISSION Certain Mobile Handset Devices and Related Touch Keyboard Software; Commission Determination Not... and Personal Communications Devices, LLC (``PCD'') of Hauppauge, New York as respondents. PCD has...

  17. Perancangan Rangkaian Charger Telepon Seluler Dengan Sumber Catuan Handset Lain

    Directory of Open Access Journals (Sweden)

    Eka Wahyudi

    2009-11-01

    Full Text Available Kecenderungan setiap orang yang ingin melakukan segala sesuatu dengan praktis dan mudah, menyebabkan munculnya keinginan untuk tidak mau dibatasi oleh tempat dan waktu dalam melakukan aktivitas. Demikian pula dalam hal mencatu baterai handphone, akan lebih praktis jika bisa mencatu listrik baterai handphone yang lemah (low battery tanpa harus bergantung pada ketersediaan sumber arus PLN. Alat yang dirancang dalam penelitian ini digunakan  untuk mencatu handphone tanpa melalui sumber PLN. Rangkaian utama alat ini terdiri dari 3 bagian utama, yaitu multivibrator astabil, voltage quadrupler dan voltage regulation. Rangkaian multivibrator astabil ini akan menghasilkan tegangan keluaran AC yang digunakan sebagai input rangkaian voltage quadrupler agar bisa bekerja. Rangkaian voltage quadrupler ini akan mengalikan  4 kali dari tegangan input yang masuk, sehingga tegangan keluaran (Vout menjadi 4 kali tegangan masukan (Vin. Hasil akhir dari alat yang sudah dibuat belum memuaskan karena hanya bisa mencatu 1 jenis handset yaitu Nokia seri 8210 dengan efisiensi yang rendah. Untuk kedepannya alat ini bisa dikembangkan lagi dengan menaikkan nilai arus, dengan menggunakan penguatan transistor. Transistor yang digunakan harus memiliki karakteristik nilai hfe yang tinggi dan tegangan DC yang kecil.

  18. Quad Band Handset Antenna for LTE MIMO and WLAN Application

    Directory of Open Access Journals (Sweden)

    H. S. Wong

    2014-01-01

    Full Text Available A compact quad band antenna for long-term evolution (LTE MIMO and WLAN application in the handset is presented in this paper. The proposed antenna comprises two symmetrical quarter wavelength radiating strips and a slotted ground plane. On the ground plane, a T-shaped slot is cut from the bottom. Two symmetrical P-shaped slots are etched at both sides of the ground plane. The radiating strips and slots generate a lower resonant at 780 MHz and an upper resonant at 2.350 GHz to cover LTE 700 Band 14, LTE 2300, 2.4 GHz WLAN, and LTE 2500. A novel isolation technique by placing a rectangular patch between the radiating strips is presented. The rectangular patch creates a dedicated current path for each radiating strip. The proposed antenna has high isolation of less than −18 dBi at LTE 2300, 2.4 GHz WLAN, and LTE 2500 band.

  19. On the Effect of Different Grips of Handsets on Data Rate in the Measured Channels

    Directory of Open Access Journals (Sweden)

    Maryam Rahimi

    2015-01-01

    Full Text Available The investigation on the achieved data rate of the cellular system considering different grips of handsets at different frequencies using measurement results of the measurement campaign—which was carried out in the city of Aalborg—is presented in this paper. The achieved data rate of the multiple-input single-output (MISO interference channel is investigated. A typical propagation environment using two BSs and four handsets, like smart phones, held by four to eight different users was designed and multiple-input multiple-output (MIMO channels in different scenarios were measured. In this paper, two BSs and two handsets at each measurement time are considered. The impact of the different parameters like correlation, different grips of handsets, and different long term evolution (LTE frequency bands on the achieved data rate is investigated for different measurements. It could be concluded that the variations in the values of data rate are weakly associated with the different grips of handsets but more correlated with different frequencies.

  20. Performance Evaluation Process.

    Science.gov (United States)

    1998

    This document contains four papers from a symposium on the performance evaluation process and human resource development (HRD). "Assessing the Effectiveness of OJT (On the Job Training): A Case Study Approach" (Julie Furst-Bowe, Debra Gates) is a case study of the effectiveness of OJT in one of a high-tech manufacturing company's product…

  1. 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.

  2. 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.

  3. A Comparative Study of the Effects of Substrate Composite Materials on External and Internal Handset Antenna EM Absorption

    Directory of Open Access Journals (Sweden)

    Md Ikbal HOSSAIN

    2016-09-01

    Full Text Available Cellular phones are used in the vicinity of a human head, which absorbs power from antenna radiation. This investigation analyzes the effects of antenna substrate materials on electromagnetic (EM absorption in a human head. Antennas are used in analysis with four different dielectric substrate materials, which are Bakelite, FR4 glass epoxy, Rogers R04003, and Taconic TLC. Moreover, two different thicknesses of each substrate are considered in the experimental setup. The EM absorption associated with two types of cell phone antennas is evaluated in the closed vicinity of the human head model. One of them is planar inverted-F antenna (PIFA, which is used as the internal handset antenna and another one is helical antenna, which is used as external handset antenna. This investigation consists of two different operating frequency bands, GSM 900 MHz and DCS 1800 MHz. The EM absorption in the human head is presented using the peak specific absorption rate (SAR and total absorbed power (TAP by the user. The finite-difference time-domain (FDTD method based on Computer Simulation Technology (CST Microwave studio is utilized in this investigation. The obtained results show that the substrate materials do not effect SAR and TAP values considerably for both antennas, but substrate thickness affects the SAR and TAP values significantly. In addition, the substrate thickness affects the SAR and TAP values significantly in most of the cases Moreover, PIFA produces lower SAR than that of a helical antenna significantly for both GSM and DCS frequency band.DOI: http://dx.doi.org/10.5755/j01.ms.22.3.8889

  4. A Comparative Study of the Effects of Substrate Composite Materials on External and Internal Handset Antenna EM Absorption

    Directory of Open Access Journals (Sweden)

    Md Ikbal HOSSAIN

    2016-09-01

    Full Text Available Cellular phones are used in the vicinity of a human head, which absorbs power from antenna radiation. This investigation analyzes the effects of antenna substrate materials on electromagnetic (EM absorption in a human head. Antennas are used in analysis with four different dielectric substrate materials, which are Bakelite, FR4 glass epoxy, Rogers R04003, and Taconic TLC. Moreover, two different thicknesses of each substrate are considered in the experimental setup. The EM absorption associated with two types of cell phone antennas is evaluated in the closed vicinity of the human head model. One of them is planar inverted-F antenna (PIFA, which is used as the internal handset antenna and another one is helical antenna, which is used as external handset antenna. This investigation consists of two different operating frequency bands, GSM 900 MHz and DCS 1800 MHz. The EM absorption in the human head is presented using the peak specific absorption rate (SAR and total absorbed power (TAP by the user. The finite-difference time-domain (FDTD method based on Computer Simulation Technology (CST Microwave studio is utilized in this investigation. The obtained results show that the substrate materials do not effect SAR and TAP values considerably for both antennas, but substrate thickness affects the SAR and TAP values significantly. In addition, the substrate thickness affects the SAR and TAP values significantly in most of the cases Moreover, PIFA produces lower SAR than that of a helical antenna significantly for both GSM and DCS frequency band.DOI: http://dx.doi.org/10.5755/j01.ms.22.3.8889

  5. Zambia - Threshold Performance Evaluation

    Data.gov (United States)

    Millennium Challenge Corporation — The MCC commissioned this ex post evaluation to provide an objective and rigorous assessment of the effectiveness and efficacy of ZTP activities. The evaluation team...

  6. 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)

  7. Performance Evaluations in Audit Firms

    DEFF Research Database (Denmark)

    Riise Johansen, Thomas; Christoffersen, Jeppe

    2017-01-01

    Previous research has only minimally examined the association between the behaviour and performance evaluations of individual auditors beyond the use of efficiency-focused evaluations. We examine the association between dysfunctional auditor behaviour and three evaluation foci: an efficiency focu...

  8. Algorithm performance evaluation

    Science.gov (United States)

    Smith, Richard N.; Greci, Anthony M.; Bradley, Philip A.

    1995-03-01

    Traditionally, the performance of adaptive antenna systems is measured using automated antenna array pattern measuring equipment. This measurement equipment produces a plot of the receive gain of the antenna array as a function of angle. However, communications system users more readily accept and understand bit error rate (BER) as a performance measure. The work reported on here was conducted to characterize adaptive antenna receiver performance in terms of overall communications system performance using BER as a performance measure. The adaptive antenna system selected for this work featured a linear array, least mean square (LMS) adaptive algorithm and a high speed phase shift keyed (PSK) communications modem.

  9. Tanzania - Threshold Performance Evaluation

    Data.gov (United States)

    Millennium Challenge Corporation — The methodologies employed by the evaluation are both quantitative and qualitative. Wherever possible, we obtain data and employ an identification strategy with...

  10. System and Circuit Design Aspects for CMOS Wireless Handset Receivers

    DEFF Research Database (Denmark)

    Mikkelsen, Jan H.

    contributor to LO leakage. To minimize the coupling to and from inductors the traditional approach is to use guard-ring structures. While guard-rings improve isolation they also form a trade-off between device area and performance. The relation between guard-ring area and inductor performance is evaluated...... of different receiver architectures is given and a discussion of some fundamental problems in relation to CMOS integration is addressed. Based on the standards provided for Universal Mobile Telephone System (UMTS) a set of requirements is derived for a UTRA/FDD (UMTS Terrestial Radio Access - Frequency...... Division Duplex) direct-conversion receiver (DCR). The wideband nature of the UMTS signal opens up for simple DC-offset cancellation schemes. In line of this the use of highpass filtering as a means to reduce the DC-offset is pursued using link simulations. To simplify receiver planning it is common...

  11. Vender Performance Evaluation.

    Science.gov (United States)

    Grant, Joan; Perelmuter, Susan

    1978-01-01

    Vendor selection can mean success or failure of an approval plan; this study evaluates three book vendors by comparing their plans on the bases of speed, bibliographic accuracy, and discounts. (Author/CWM)

  12. The effect of GSM and TETRA mobile handset signals on blood pressure, catechol levels and heart rate variability.

    Science.gov (United States)

    Barker, Anthony T; Jackson, Peter R; Parry, Helen; Coulton, Leslie A; Cook, Greg G; Wood, Steven M

    2007-09-01

    An acute rise in blood pressure has been reported in normal volunteers during exposure to signals from a mobile phone handset. To investigate this finding further we carried out a double blind study in 120 healthy volunteers (43 men, 77 women) in whom we measured mean arterial pressure (MAP) during each of six exposure sessions. At each session subjects were exposed to one of six different radio frequency signals simulating both GSM and TETRA handsets in different transmission modes. Blood catechols before and after exposure, heart rate variability during exposure, and post exposure 24 h ambulatory blood pressure were also studied. Despite having the power to detect changes in MAP of less than 1 mmHg none of our measurements showed any effect which we could attribute to radio frequency exposure. We found a single statistically significant decrease of 0.7 mmHg (95% CI 0.3-1.2 mmHg, P = .04) with exposure to GSM handsets in sham mode. This may be due to a slight increase in operating temperature of the handsets when in this mode. Hence our results have not confirmed the original findings of an acute rise in blood pressure due to exposure to mobile phone handset signals. In light of this negative finding from a large study, coupled with two smaller GSM studies which have also proved negative, we are of the view that further studies of acute changes in blood pressure due to GSM and TETRA handsets are not required.

  13. 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 lite...

  14. 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

  15. Lubricant Evaluation and Performance

    Science.gov (United States)

    1989-04-01

    qp0 20 0 r.Ca4 ൞ V0 vHa 64) 02 v r.Cz4 o)024 0 = = 19 2q H 0 0 U = =-Cf. A Ř 0 C) .0H 4 202H 0 =-4 04 I 0 0-4 I al4 4A. - 0 (a 4 2 = 4 I44 000 C 4...June 1986). 13. Worthington, K.I., "Evaluation of the Alcor Micro Carbon Residue Tester (MCRT)," Rolls-Royce Report No. ESL 11474, 20 May 1986. 513

  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. 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)

  18. Simulation of pulsed ELF magnetic fields generated by GSM mobile phone handsets for human electromagnetic bioeffects research.

    Science.gov (United States)

    Perentos, N; Iskra, S; McKenzie, R J; Cosi, I

    2008-09-01

    Human provocation studies that investigate the effects of Global System for Mobiles (GSM) communication systems on the brain have focused on Radio Frequency (RF) exposure. We wish to further extend such study by investigating the effect of both RF and Extremely Low Frequency (ELF) field exposure, the latter generated by the GSM handset's battery switching. The use of a commercial handset as an exposure source for such investigations is problematic for a number of reasons and therefore a simulated exposure source, capable of producing both RF and ELF components of exposure, is desirable. As a first step in developing such a source, we have quantified and characterized the ELF field from several commercial handsets (the RF characteristics being already well understood). Through experimental measurement we deduce that these fields can be sufficiently simulated by a 9 mm radius loop residing 10 mm beneath the front surface of the handset device and carrying enough current to generate peak fields of 25 microT at the surface of the handset.

  19. 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…

  20. Novel wideband MIMO antennas that can cover the whole LTE spectrum in handsets and portable computers.

    Science.gov (United States)

    Sanad, Mohamed; Hassan, Noha

    2014-01-01

    A dual resonant antenna configuration is developed for multistandard multifunction mobile handsets and portable computers. Only two wideband resonant antennas can cover most of the LTE spectrums in portable communication equipment. The bandwidth that can be covered by each antenna exceeds 70% without using any matching or tuning circuits, with efficiencies that reach 80%. Thus, a dual configuration of them is capable of covering up to 39 LTE (4G) bands besides the existing 2G and 3G bands. 2×2 MIMO configurations have been also developed for the two wideband antennas with a maximum isolation and a minimum correlation coefficient between the primary and the diversity antennas.

  1. Small-Size Eight-Band Frequency Reconfigurable Antenna Loading a MEMS Switch for Mobile Handset Applications

    Directory of Open Access Journals (Sweden)

    Xin Meng

    2014-01-01

    Full Text Available A planar small-size eight-band frequency reconfigurable antenna for LTE/WWAN mobile handset applications is proposed. The proposed antenna consists of a feeding strip and a coupled strip, with a total dimension of 10 × 29.5 mm2. Reconfigurability is realized by incorporating a one-pole four-throw RF switch, which is embedded in the coupled strip and changes the resonant modes for the lower band. By combining four different working modes, the proposed antenna successfully realize the eight-band operation, covering the operating bands of 700~787 MHz, 824~960 MHz, and 1710~2690 MHz. In addition, the simple DC bias circuit of the RF switch has little effect on the antenna performances, with no significant reduction in antenna efficiency and variations in the radiation patterns. The measured antenna efficiencies are 40%~50% and over 60% for the lower band and the upper band, respectively. Prototypes of the proposed frequency reconfigurable antenna incorporating the one-pole four-throw switch are fabricated and measured. The measured results including return losses and radiation characteristics are presented.

  2. MIMO Channel Capacity for Handsets in Data Mode Operation

    DEFF Research Database (Denmark)

    Nielsen, Jesper Ødum; Yanakiev, Boyan; Bonev, Ivan Bonev

    2010-01-01

    The current paper concerns realistic evaluation of the capacity of the MIMO channel between a BS and handheld device, such as a PDA or smart phone, held in front of the user’s body (data mode). The work is based on measurements of the MIMO channel between two widely separated BSs in a micro...

  3. MIMO Channel Capacity for Handsets in Data Mode Operation

    DEFF Research Database (Denmark)

    Nielsen, Jesper Ødum; Yanakiev, Boyan; Bonev, Ivan Bonev

    2010-01-01

    The current paper concerns realistic evaluation of the capacity of the MIMO channel between a BS and handheld device, such as a PDA or smart phone, held in front of the user’s body (data mode). The work is based on measurements of the MIMO channel between two widely separated BSs in a micro-cellular...

  4. Power Amplifier Linearization Techniques for 3rd Generation Handsets

    DEFF Research Database (Denmark)

    Nielsen, Troels Studsgaard

    is put on the study, design, and implementation of a 5th order polynomial workfunction predistorter. To facilitate a realistic predistorter system study, an accurate PA behavioral model is developed from pulsed large signal S-parameters measurements of a real 3G-PP W-CDMA device. At the nominal 0d...... that the inclusion of even order workfunction terms improves predistorter linearity performance but at the expense of more stringent workfunction bandwidth requirements, increased sensitivity of the workfunction coefficients, and a slightly degraded adaptation speed. A study of the predistorter noise degradation...... provides a simplified and compact noise analysis, which enables the RF designer to make a qualitatively trade-off between linearity performance and noise degradation. A study of the predistorter adaptation to varying antenna loads results in a novel parameterized workfunction, which can improve adaptation...

  5. Evaluating Judicial Performance Evaluation: A Conceptual Analysis

    Directory of Open Access Journals (Sweden)

    Joe McIntyre

    2014-12-01

    Full Text Available While the performance evaluation of judges has become a ubiquitous aspect of modern judicial administration, evaluation mechanisms of are too often utilised uncritically, without reflection on why we evaluate judges, and how ‘measurement’ furthers these objectives. This article provides a conceptual analysis of the role and purpose of performance evaluation, conceiving it as a limited tool of judicial accountability, which itself exists only to promote excellent judging. As such, the efficacy of evaluation mechanisms must always be assessed by reference to their impact on these overarching accountability objectives. The article explores the value of this conception approach by briefly examining three uses of performance evaluation: 1 judicial promotions; 2 judicial retention elections; and 3 judicial professional development. In doing so it illustrates how a clear conceptual approach invites a more nuanced and critical examination of the limitations and benefits of judicial performance evaluation programs. Mientras que la evaluación del rendimiento de los jueces se ha convertido en un aspecto omnipresente de la administración judicial moderna, los mecanismos de evaluación se utilizan con demasiada frecuencia de manera acrítica, sin reflexionar sobre las razones por las que evaluamos a los jueces, y cómo se alcanzan los objetivos buscados mediante la 'medición'. Este artículo ofrece un análisis conceptual de la función y el propósito de la evaluación del rendimiento, concibiéndola como una herramienta limitada de la responsabilidad judicial, que a su vez sólo existe para promover la excelencia judicial. Como tal, la eficacia de los mecanismos de evaluación siempre se debe comprobar en función de su impacto en los objetivos de responsabilidad globales. El artículo explora el valor de este enfoque examinando brevemente tres usos de la evaluación de rendimiento: 1 promociones judiciales; 2 elecciones para la reelección de

  6. 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....

  7. 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

  8. Performability Modelling Tools, Evaluation Techniques and Applications

    NARCIS (Netherlands)

    Haverkort, Boudewijn R.H.M.

    1990-01-01

    This thesis deals with three aspects of quantitative evaluation of fault-tolerant and distributed computer and communication systems: performability evaluation techniques, performability modelling tools, and performability modelling applications. Performability modelling is a relatively new

  9. Wideband Tunable PIFA Antenna with Loaded Slot Structure for Mobile Handset and LTE Applications

    Directory of Open Access Journals (Sweden)

    I. Elfergani

    2014-04-01

    Full Text Available A compact planar inverted F antenna (PIFA with a tunable frequency response is presented. Tuning of the resonant frequency is realized by loading a varactor on an embedded slot of the proposed antenna structure without further optimizing other antenna geometry parameters. The antenna exhibits a wide frequency range from 1570 to 2600 MHz with a good impedance matching (S11 ≤-10 dB covering the GPS, PCS, DCS, UMTS, WLAN and LTE systems. To validate the theoretical model and design concept, the antenna prototype was fabricated and measured. The compact size of the antenna is 15mm × 8mm × 3mm, which makes this antenna a good candidate for mobile handset and wireless communication applications.

  10. Compact Antenna with Frequency Reconfigurability for GPS/LTE/WWAN Mobile Handset Applications

    Directory of Open Access Journals (Sweden)

    Lingsheng Yang

    2016-01-01

    Full Text Available A compact frequency reconfigurable antenna for mobile handset application is proposed in this paper. The antenna consists of an inverted L-shaped feeding strip, a shorter grounded strip, and a longer grounded strip which is connected with four inductors by using a single-pole four-throw RF switch. When we change the working states of the RF switch, the corresponding inductor is connected with the long grounded strip and different resonant modes of the antenna can be realized. The measured −6 dB impedance bandwidth of the presented antenna is 683–960 MHz and 1460–2820 MHz, which is able to cover the LTE700/GSM850/900 and GPS/DCS1800/PCS1900/UMTS2100/LTE2300/2500 bands. The antenna gain, radiation efficiency, and radiation patterns are also described in the paper.

  11. 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...

  12. 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...

  13. 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...

  14. 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...

  15. 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...

  16. A Novel Dual-Shorting Point PIFA (GSM850 to IMT-A for Mobile Handsets

    Directory of Open Access Journals (Sweden)

    Pengcheng Li

    2013-01-01

    Full Text Available A novel planar inverted-F antenna (PIFA with dual-shorting points is proposed for multiband mobile handsets. The antenna comprises a meandered strip, a feeding point, two shorting points, and a slotted ground plane. For bandwidth enhancement of DCS/PCS/UMTS/WLAN 11.b/LTE2300/2500 and IMT-Advanced (International Mobile Telecommunications-Advanced, the antenna applies a dual-shorting points design, which generates a multimode between 1707 and 2815 MHz. The proposed antenna has good impedance matching characteristics for GSM (824–960 MHz/DCS (1710–1880 MHz/PCS (1850–1990 MHz/UMTS (1920–2170 MHz/LTE (2300–2400 MHz, 2500–2690 MHz/WLAN 11.b (2400–2480 MHz and IMT-A (4200–4800 MHz. The measured radiation efficiencies of the proposed antenna were all higher than 60% in GSM850/900, DCS/PCS, UMTS, LTE2300/2500, and WLAN 802.11 b, and it is up to 86% in IMT-A.

  17. 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...

  18. 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...

  19. Impact of the handset form factor on inverted-F antennas performance

    DEFF Research Database (Denmark)

    Margues, Pablo Fernández; Despointes, E. H.; Barrio, Samantha Caporal Del;

    2012-01-01

    This paper describes the portability of a multiband antenna design over a printed circuit board (PCB) of different sizes. The antenna consists of two inverted-F antennas (IFA) operating at the same resonance frequency, for multiple-input multiple-output (MIMO) operation. The frequency range prese...

  20. 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.

  1. Portfolio optimization and performance evaluation

    DEFF Research Database (Denmark)

    Juhl, Hans Jørn; Christensen, Michael

    2013-01-01

    Based on an exclusive business-to-business database comprising nearly 1,000 customers, the applicability of portfolio analysis is documented, and it is examined how such an optimization analysis can be used to explore the growth potential of a company. As opposed to any previous analyses, optimal...... 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......, and it is shown how these performance measures complement the optimization analysis....

  2. Performance evaluation of biogas burners

    Energy Technology Data Exchange (ETDEWEB)

    Chandra, A.; Tiwari, G.N.; Srivastava, V.K.; Yadav, Y.P. (Indian Inst. of Tech., New Delhi (India). Centre of Energy Studies)

    1991-01-01

    The results of testing some biogas burners of various brands are presented. A wide variation is found in their performance under similar conditions of testing. Parametric investigations have also been carried out on a typical biogas burner. These investigations reveal that the burner efficiency is a strong function of biogas flow pressure, pan-size and its position over the burner head. (author).

  3. Multiband Planar Inverted-F Antenna with Independent Operating Bands Control for Mobile Handset Applications

    Directory of Open Access Journals (Sweden)

    Mustapha El Halaoui

    2017-01-01

    Full Text Available A new compact multiband PIFA (Planar Inverted-F Antenna for mobile handset is proposed in this article. The proposed PIFA has a simple geometry with four slots integrated in the radiating patch and ground plane. The PIFA occupies a small volume of 51 × 14 × 7.2 mm3 and is placed on the top portion of mobile phone. The optimized PIFA is worked in the 790 MHz band (737–831 MHz, the 1870 MHz band (1794–1977 MHz, the 2550 MHz band (2507–2615 MHz, and the 3400 MHz band (3341–3545 MHz, to cover LTE700, LTE800, DCS1800, PCS1900, LTE1800, LTE1900, LTE2500, and WIMAX3400 bands. Each of the four operating bands can be controlled independently by the variation of a single parameter of the proposed design, with a wide control range. An omnidirectional radiation pattern to each resonant frequency is obtained with a maximum gain of 2.15 dBi at 790 MHz, 3.99 dBi at 1870 MHz, 4.57 dBi at 2550 MHz, and 6.43 dBi at 3400 MHz. The proposed PIFA is studied in the free space and in the presence of other mobile phone components such as the battery, LCD (liquid crystal display, camera, microphone, speaker, buttons, and a plastic housing. The distribution of specific absorption rate for both European and American standards for each operating band and at various distances between the antenna and the human head is also studied.

  4. 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...

  5. Colorimetric evaluation of display performance

    Science.gov (United States)

    Kosmowski, Bogdan B.

    2001-08-01

    The development of information techniques, using new technologies, physical phenomena and coding schemes, enables new application areas to be benefited form the introduction of displays. The full utilization of the visual perception of a human operator, requires the color coding process to be implemented. The evolution of displays, from achromatic (B&W) and monochromatic, to multicolor and full-color, enhances the possibilities of information coding, creating however a need for the quantitative methods of display parameter assessment. Quantitative assessment of color displays, restricted to photometric measurements of their parameters, is an estimate leading to considerable errors. Therefore, the measurements of a display's color properties have to be based on spectral measurements of the display and its elements. The quantitative assessment of the display system parameters should be made using colorimetric systems like CIE1931, CIE1976 LAB or LUV. In the paper, the constraints on the measurement method selection for the color display evaluation are discussed and the relations between their qualitative assessment and the ergonomic conditions of their application are also presented. The paper presents the examples of using LUV colorimetric system and color difference (Delta) E in the optimization of color liquid crystal displays.

  6. 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

  7. 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.

  8. The perceived fairness of performance evaluations

    NARCIS (Netherlands)

    F.G.H. Hartmann (Frank)

    2012-01-01

    textabstractWhen it comes to procedural justice, Management Accounting and Human Resources functions have to get closer to create systems of performance evaluation that are perceived as fair – and that also take uncertainty into consideration.

  9. Performance Evaluation of Blind Tropospheric Delay correction ...

    African Journals Online (AJOL)

    Performance Evaluation of Blind Tropospheric Delay correction Models over Africa. ... consisting of surface meteorological models and global empirical models. ... GPT2w and UNB3M models with accurate International GNSS Service (IGS)- ...

  10. Performance Evaluation of Portfolios with Margin Requirements

    OpenAIRE

    Hui Ding; Zhongbao Zhou; Helu Xiao; Chaoqun Ma; Wenbin Liu

    2014-01-01

    In financial markets, short sellers will be required to post margin to cover possible losses in case the prices of the risky assets go up. Only a few studies focus on the optimization and performance evaluation of portfolios in the presence of margin requirements. In this paper, we investigate the theoretical foundation of DEA (data envelopment analysis) approach to evaluate the performance of portfolios with margin requirements from a different perspective. Under the mean-variance framework,...

  11. 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.

  12. 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.

  13. 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.

  14. Assessment beyond Performance: Phenomenography in Educational Evaluation

    Science.gov (United States)

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

    2007-01-01

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

  15. Assessment beyond Performance: Phenomenography in Educational Evaluation

    Science.gov (United States)

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

    2007-01-01

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

  16. 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…

  17. 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),

  18. 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…

  19. 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.

  20. Performability evaluation of the SIFT computer

    Science.gov (United States)

    Meyer, J. F.; Furchtgott, D. G.; Wu, L. T.

    1979-01-01

    Performability modeling and evaluation techniques are applied to the SIFT computer as it might operate in the computational evironment of an air transport mission. User-visible performance of the total system (SIFT plus its environment) is modeled as a random variable taking values in a set of levels of accomplishment. These levels are defined in terms of four attributes of total system behavior: safety, no change in mission profile, no operational penalties, and no economic process whose states describe the internal structure of SIFT as well as relavant conditions of the environment. Base model state trajectories are related to accomplishment levels via a capability function which is formulated in terms of a 3-level model hierarchy. Performability evaluation algorithms are then applied to determine the performability of the total system for various choices of computer and environment parameter values. Numerical results of those evaluations are presented and, in conclusion, some implications of this effort are discussed.

  1. Perceived controllability and fairness in performance evaluation

    Directory of Open Access Journals (Sweden)

    Eduardo Schiehll

    2014-12-01

    Full Text Available We investigated the effects of environmental uncertainty, decentralization of decisions rights, and the use of subjective performance measures on managers’ perceptions of outcome controllability and performance evaluation fairness. Based on a survey of 339 middle- and upper- level managers, our results suggest that environmental uncertainty adversely affects perceptions of outcome controllability and that this effect is not moderated by the decentralization of decision rights. Our results also show a positive association between perceived controllability and performance evaluation fairness. Although we found no direct effect of the use of subjective performance measures on perceived performance evaluation fairness, it appears to moderate the positive effect of perceived controllability on fairness. We also show that the positive effect of the use of subjective measures may depend on contextual and job-related factors. The overall results underscore the need to consider the organizational context (environmental uncertainty and decentralization of decision rights to investigate how performance measures affect perceived controllability and fairness. Because perceived controllability and fairness affect individual attitudes and behaviors within an organization, our results have important implications for the design and use of performance evaluation systems.

  2. 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.

  3. Performance Evaluation of Portfolios with Margin Requirements

    Directory of Open Access Journals (Sweden)

    Hui Ding

    2014-01-01

    Full Text Available In financial markets, short sellers will be required to post margin to cover possible losses in case the prices of the risky assets go up. Only a few studies focus on the optimization and performance evaluation of portfolios in the presence of margin requirements. In this paper, we investigate the theoretical foundation of DEA (data envelopment analysis approach to evaluate the performance of portfolios with margin requirements from a different perspective. Under the mean-variance framework, we construct the optimization model and portfolio possibility set on considering margin requirements. The convexity of the portfolio possibility set is proved and the concept of efficiency in classical economics is extended to the portfolio case. The DEA models are then developed to evaluate the performance of portfolios with margin requirements. Through the simulations carried out in the end, we show that, with adequate portfolios, DEA can be used as an effective tool in computing the efficiencies of portfolios with margin requirements for the performance evaluation purpose. This study can be viewed as a justification of DEA into performance evaluation of portfolios with margin requirements.

  4. Evaluating student performance in clinical dietetics.

    Science.gov (United States)

    Novascone, M A

    1985-06-01

    The focus of this study was on the development and field-testing of a set of behaviorally anchored rating scales for evaluating the clinical performance of dietetic students. The scales emphasized the application of skills and knowledge. A variation of the Smith-Kendall technique was used to develop the scales. The 42 participants involved in instrument development included dietetic students, didactic and clinical instructors, and dietetic practitioners. The completed instrument contained 8 dimension statements and 70 behavioral anchors. The instrument was field-tested in 16 clinical rotations within 8 dietetic education programs. Evaluators not only rated student performance but also critiqued the format and content of the scales. The mid-to-upper portions of each scale were used most frequently, and little score variation within or across programs was noted. The scales were deemed appropriate for formative evaluation; however, some evaluators who had to grade students' performance expressed a desire for performance standards defined in terms of grades. Because the process used to develop the instrument facilitated the articulation of performance criteria, it is recommended as a practical approach to setting performance standards.

  5. 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...

  6. 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...

  7. Performance evaluations of demountable electrical connections

    Science.gov (United States)

    Niemann, R. C.; Cha, Y. S.; Hull, J. R.; Buckles, W. E.; Daugherty, M. A.

    Electrical conductors operating in cryogenic environments can require demountable connections along their lengths. The connections must have low resistance and high reliability and should allow ready assembly and disassembly. In this work, the performance of two types of connections has been evaluated. The first connection type is a clamped surface-to-surface joint. The second connection type is a screwed joint that incorporates male and female machine-thread components. The connections for copper conductors have been evaluated experimentally at 77 K. Experimental variables included thread surface treatment and assembly methods. The results of the evaluations are presented.

  8. 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.

  9. 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...... examine personnel data from six large companies and establish how subjective ratings, interpreted as ordinal rankings of employee performances within narrowly defined peer-groups, correlate with objective career outcomes. We find many similarities across firms in how subjective ratings correlate with base...

  10. 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.

  11. Measures of Searcher Performance: A Psychometric Evaluation.

    Science.gov (United States)

    Wildemuth, Barbara M.; And Others

    1993-01-01

    Describes a study of medical students that was conducted to evaluate measures of performance on factual searches of INQUIRER, a full-text database in microbiology. Measures relating to recall, precision, search term overlap, and efficiency are discussed; reliability and construct validity are considered; and implications for future research are…

  12. Simplified method for video performance evaluation

    Science.gov (United States)

    Harshbarger, John H.

    1996-04-01

    Meaningful performance evaluation of video equipment can be complex, requiring specialized equipment in which results must be interpreted by technically trained operators. The alternative to this has been to attempt evaluation by visual inspection of patterns such as the SMPTE RP-133 Medical Imaging Standard. However this involves subjective interpretation and does not indicate the point in a system at which degradation has occurred. The video waveform of such a pattern is complex and not suitable for quantitative analysis. The principal factors which influence quality of a video image on a day-to-day basis are resolution, gray scale and color, if employed. If these qualities are transmitted and displayed without degradation beyond acceptable limits, suitable performance is assured. Performance evaluation by inspection of the image produced on a video display monitor is subject to interpretation; this is resolved by inserting, at the display, the original 'perfect' electronically generated waveform to serve as a reference. Thus the viewer has a specific visual comparison as the basis for performance evaluation. Another valuable feature of the test pattern insert is that a test segment can be placed on recorded images. Thus each image recalled by tape playback or from digital storage will carry an integral means for quality assurance.

  13. Performance evaluation of lightweight piezocomposite curved actuator

    Science.gov (United States)

    Goo, Nam Seo; Kim, Cheol; Park, Hoon C.; Yoon, Kwang J.

    2001-07-01

    A numerical method for the performance evaluation of LIPCA actuators is proposed using a finite element method. Fully-coupled formulations for piezo-electric materials are introduced and eight-node incompatible elements used. After verifying the developed code, the behavior of LIPCA actuators is investigated.

  14. 48 CFR 436.604 - Performance evaluation.

    Science.gov (United States)

    2010-10-01

    ... CATEGORIES OF CONTRACTING CONSTRUCTION AND ARCHITECT-ENGINEER CONTRACTS Architect-Engineer Service 436.604... require a performance evaluation report on the work done by the architect-engineer after the completion of or during the construction of the designed project....

  15. Performance Evaluation for Non-Teaching Professionals.

    Science.gov (United States)

    Panebianco, Anthony F.

    The program Performance Evaluation for Non-Teaching Professionals at the State University of New York Institute of Technology at Utica/Rome provides periodic assessments as required by institutional policy. The system is intended to establish a standard for judging quality of an employee's work and a rational and uniform basis for appraising…

  16. 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.

  17. Performance evaluation of cleanroom environmental systems

    Energy Technology Data Exchange (ETDEWEB)

    Xu, Tengfang

    2003-07-07

    This paper presents in-situ measurement results for energy and environmental performance of thirteen cleanroom systems located in the USA, including key metrics for evaluating cleanroom air system performance and overall electric power intensity. Comparisons with the IEST Recommended Practice (IEST-RP-CC012.1) are made to examine the performance of cleanroom air systems. Based upon the results, the paper discusses likely opportunities for improving cleanroom energy efficiency while maintaining effective contamination control. The paper concludes that there are wide variations in energy performance of cleanroom environmental systems, and that performance benchmarking can serve as a vehicle to identify energy efficient cleanroom design practices and to highlight important issues in cleanroom operation and maintenance.

  18. Performance evaluation of two personal bioaerosol samplers.

    Science.gov (United States)

    Tolchinsky, Alexander D; Sigaev, Vladimir I; Varfolomeev, Alexander N; Uspenskaya, Svetlana N; Cheng, Yung S; Su, Wei-Chung

    2011-01-01

    In this study, the performance of two newly developed personal bioaerosol samplers for monitoring the level of environmental and occupational airborne microorganisms was evaluated. These new personal bioaerosol samplers were designed based on a swirling cyclone with recirculating liquid film. The performance evaluation included collection efficiency tests using inert aerosols, the bioaerosol survival test using viable airborne microorganism, and the evaluation of using non-aqueous collection liquid for long-period sampling. The test results showed that these two newly developed personal bioaerosol samplers are capable of doing high efficiency, aerosol sampling (the cutoff diameters are around 0.7 μm for both samplers), and have proven to provide acceptable survival for the collected bioaerosols. By using an appropriate non-aqueous collection liquid, these two personal bioaerosol samplers should be able to permit continuous, long-period bioaerosol sampling with considerable viability for the captured bioaerosols.

  19. 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.

  20. Performance Evaluation of Investment (Mutual Funds

    Directory of Open Access Journals (Sweden)

    Povilas Vyšniauskas

    2014-12-01

    Full Text Available The efficiency of an investment fund is one of the main components in evaluating the performance of the fund. This study seeks for introducing and comparing risk and performance evaluation ratios. The paper is aimed at testing the worked out ratios and at distinguishing between the best ones for the purpose of evaluating the performance of Lithuanian mutual funds. Scientific studies show that a standard deviation, alpha, beta, Sharpe and Treynor ratios are mostly employed for identifying the performance of mutual funds that are also compared with their benchmark index to establish if these funds are outperformed and if is it worth paying management fees to investment banks for managing mutual funds. Historical data were selected for the period from 2012-01-02 to 2013-10-15 analysing the prices of monthly funds. The paper points out the areas of a practical application of the proposed model for investment fund valuation, which may not only provide valuable outcomes for practitioners but also may inspire further research on this article.

  1. Performance Evaluation of MANET in Realistic Environment

    Directory of Open Access Journals (Sweden)

    Shailender Gupta

    2012-07-01

    Full Text Available In order to facilitate communication in Mobile Ad hoc Network (MANET, routing protocols are developed. The performance of these protocols depends upon various factors such as: transmission range, number of nodes deployed and mobility of the nodes. Another factor which affects the performance of MANET routing protocols is the environment in which ad hoc network is deployed. The MANET environment may contain obstacles such as mountains lakes, buildings and river. These obstacles restrict nodes movement but may or may not obstruct the effective transmission range of nodes deployed. This paper is an effort to evaluate the performance of MANET routing protocols in presence of obstacles by designing a simulator in MATLAB-10. To make the situation more realistic obstacle of different shapes, size, number and type were introduced in the simulation region. We found significant impact of the same on the performance of routing protocols

  2. Performance evaluation soil samples utilizing encapsulation technology

    Energy Technology Data Exchange (ETDEWEB)

    Dahlgran, James R.

    1997-12-01

    Performance evaluation soil samples and method of their preparation are described using encapsulation technology to encapsulate analytes which are introduced into a soil matrix for analysis and evaluation by analytical laboratories. Target analytes are mixed in an appropriate solvent at predetermined concentrations. The mixture is emulsified in a solution of polymeric film forming material. The emulsified solution is polymerized to form microcapsules. The microcapsules are recovered, quantitated and introduced into a soil matrix in a predetermined ratio to form soil samples with the desired analyte concentration.

  3. Performance Evaluation Methods for Assistive Robotic Technology

    Science.gov (United States)

    Tsui, Katherine M.; Feil-Seifer, David J.; Matarić, Maja J.; Yanco, Holly A.

    Robots have been developed for several assistive technology domains, including intervention for Autism Spectrum Disorders, eldercare, and post-stroke rehabilitation. Assistive robots have also been used to promote independent living through the use of devices such as intelligent wheelchairs, assistive robotic arms, and external limb prostheses. Work in the broad field of assistive robotic technology can be divided into two major research phases: technology development, in which new devices, software, and interfaces are created; and clinical, in which assistive technology is applied to a given end-user population. Moving from technology development towards clinical applications is a significant challenge. Developing performance metrics for assistive robots poses a related set of challenges. In this paper, we survey several areas of assistive robotic technology in order to derive and demonstrate domain-specific means for evaluating the performance of such systems. We also present two case studies of applied performance measures and a discussion regarding the ubiquity of functional performance measures across the sampled domains. Finally, we present guidelines for incorporating human performance metrics into end-user evaluations of assistive robotic technologies.

  4. 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.

  5. Hearing aid-compatible mobile handsets, petition of American National Standards Committee C63 (EMC) ANSO ASC C63 (TM). Final rule.

    Science.gov (United States)

    2008-05-07

    The Federal Communications Commission (Commission) adopts various proposals to amend its hearing aid compatibility policies and requirements pertaining to wireless services, including modifications and other requirements along the framework proposed in a consensus plan (Joint Consensus Plan) developed jointly by industry and representatives for the deaf and hard of hearing community. The Commission anticipates that these rule changes, taken together and largely supported by manufacturers, service providers, and consumers with hearing loss, will meet statutory obligations to ensure reasonable access to telephone service by persons with impaired hearing. These requirements are intended to benefit wireless users in the deaf and hard of hearing community, including the most disadvantaged who are more likely to rely on telecoil-equipped hearing aids, as well as to ensure that these consumers have a variety of handsets available to them, including handsets with innovative features.

  6. The SWOT Analysis of Competitive Environment of Domestic Handset Industry%国产手机企业竞争环境的SWOT分析

    Institute of Scientific and Technical Information of China (English)

    遆云凤

    2012-01-01

    随着国外“洋品牌”手机厂商不断进入中国市场,国产手机的竞争优势日趋弱化。文章结合国产手机发展现状,运用SWOT分析方法,对国产手机企业的竞争优势、弱势及面临的机遇与挑战逐一加以分析,以便今后有效制定国产手机企业的发展战略。%With the foreign brand mobile phone competitors entering ceaselessly, the competition advantage of domestic mobile phone is increasingly weakening. Combining with the domestic handset development situation. It is analyses by SWOT model that domestic handset competitive advantages,weaknesses,faced opportunities and challeges, to promote domestic mobile phone de- velopment strategic measures.

  7. Sensor performance evaluation analysis of imitation fingerprint

    Science.gov (United States)

    Yu, Kyung-hee; Lee, Hyunsuk; Bae, You-suk

    2008-04-01

    The fingerprint recognition is the most developed field in the biometrics recognition and it can apply to the various applications. So the various studies are in progress for an enhancement of fingerprint recognition performance. In this paper, we will study the fingerprint recognition sensor. The fingerprint becomes input using fingerprint sensor to the fingerprint recognition system and the performance of the sensor has an effect on the fingerprint quality. Therefore, the improvement of system performance is possible by improving the performance of sensor. In this paper, we will study sensors which can be protected or unprotected from artificial fingerprint attack. We make various artificial fingerprints, and test sensors to overcome artificial fingerprint attack. We will analyze results of scanning test according to the various sensors and propose the method using the histogram of the normal image in order to measure the performance of these sensors. The measured characteristics are the resolution, shift, gradient, contrast, and rotation. The purpose of this paper is to propose the ways of the performance measurement which can be a criterion to evaluate the sensor performance.

  8. 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 ...

  9. Automated Laser Seeker Performance Evaluation System (ALSPES)

    Science.gov (United States)

    Martin, Randal G.; Robinson, Elisa L.

    1988-01-01

    The Automated Laser Seeker Performance Evaluation System (ALSPES), which supports the Hellfire missile and Copperhead projectile laser seekers, is discussed. The ALSPES capabilities in manual and automatic operation are described, and the ALSPES test hardware is examined, including the computer system, the laser/attenuator, optics systems, seeker test fixture, and the measurement and test equipment. The calibration of laser energy and test signals in ALSPES is considered.

  10. 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)....

  11. 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...

  12. Preclinical Performance Evaluation of Percutaneous Glucose Biosensors

    Science.gov (United States)

    Soto, Robert J.; Schoenfisch, Mark H.

    2015-01-01

    The utility of continuous glucose monitoring devices remains limited by an obstinate foreign body response (FBR) that degrades the analytical performance of the in vivo sensor. A number of novel materials that resist or delay the FBR have been proposed as outer, tissue-contacting glucose sensor membranes as a strategy to improve sensor accuracy. Traditionally, researchers have examined the ability of a material to minimize the host response by assessing adsorbed cell morphology and tissue histology. However, these techniques do not adequately predict in vivo glucose sensor function, necessitating sensor performance evaluation in a relevant animal model prior to human testing. Herein, the effects of critical experimental parameters, including the animal model and data processing methods, on the reliability and usefulness of preclinical sensor performance data are considered. PMID:26085566

  13. Evaluating the Performance of Rijndael Encryption

    Directory of Open Access Journals (Sweden)

    Bogdan CIOBANU

    2012-01-01

    Full Text Available In this paper we present a a comparative analysis of the performance of the Rijndael algorithm, developed with the help of two programming languages, namely C and Matlab. The main goal is to get a full, detailed picture about the functioning of this algorithm. In order to evaluate the performances of the Rijndael algorithm for the two different implementations, we took into account establishing the variable factors within each type of implementation so as to avoid the reasons that might lead to running differences (for instance, the comparison of the two implementations will be performed for the situation in which the encryption key length is the same. We chose to use the traditional algorithm for both types of implementation, in which the input is transformed into 4 blocks of 4 bytes, followed by the handling of each byte from each individual column

  14. Performance evaluation of an automotive thermoelectric generator

    Science.gov (United States)

    Dubitsky, Andrei O.

    Around 40% of the total fuel energy in typical internal combustion engines (ICEs) is rejected to the environment in the form of exhaust gas waste heat. Efficient recovery of this waste heat in automobiles can promise a fuel economy improvement of 5%. The thermal energy can be harvested through thermoelectric generators (TEGs) utilizing the Seebeck effect. In the present work, a versatile test bench has been designed and built in order to simulate conditions found on test vehicles. This allows experimental performance evaluation and model validation of automotive thermoelectric generators. An electrically heated exhaust gas circuit and a circulator based coolant loop enable integrated system testing of hot and cold side heat exchangers, thermoelectric modules (TEMs), and thermal interface materials at various scales. A transient thermal model of the coolant loop was created in order to design a system which can maintain constant coolant temperature under variable heat input. Additionally, as electrical heaters cannot match the transient response of an ICE, modelling was completed in order to design a relaxed exhaust flow and temperature history utilizing the system thermal lag. This profile reduced required heating power and gas flow rates by over 50%. The test bench was used to evaluate a DOE/GM initial prototype automotive TEG and validate analytical performance models. The maximum electrical power generation was found to be 54 W with a thermal conversion efficiency of 1.8%. It has been found that thermal interface management is critical for achieving maximum system performance, with novel designs being considered for further improvement.

  15. 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.

  16. Evaluating iterative reconstruction performance in computed tomography.

    Science.gov (United States)

    Chen, Baiyu; Ramirez Giraldo, Juan Carlos; Solomon, Justin; Samei, Ehsan

    2014-12-01

    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. 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. IR required less dose than FBP to achieve the threshold AUC. In general, SAFIRE5 showed the most significant dose reduction potentials (11-54 mGy, 77%-84%), followed by

  17. Seismic Performance Evaluation of Concentrically Braced Frames

    Science.gov (United States)

    Hsiao, Po-Chien

    Concentrically braced frames (CBFs) are broadly used as lateral-load resisting systems in buildings throughout the US. In high seismic regions, special concentrically braced frames (SCBFs) where ductility under seismic loading is necessary. Their large elastic stiffness and strength efficiently sustains the seismic demands during smaller, more frequent earthquakes. During large, infrequent earthquakes, SCBFs exhibit highly nonlinear behavior due to brace buckling and yielding and the inelastic behavior induced by secondary deformation of the framing system. These response modes reduce the system demands relative to an elastic system without supplemental damping. In design the re reduced demands are estimated using a response modification coefficient, commonly termed the R factor. The R factor values are important to the seismic performance of a building. Procedures put forth in FEMAP695 developed to R factors through a formalized procedure with the objective of consistent level of collapse potential for all building types. The primary objective of the research was to evaluate the seismic performance of SCBFs. To achieve this goal, an improved model including a proposed gusset plate connection model for SCBFs that permits accurate simulation of inelastic deformations of the brace, gusset plate connections, beams and columns and brace fracture was developed and validated using a large number of experiments. Response history analyses were conducted using the validated model. A series of different story-height SCBF buildings were designed and evaluated. The FEMAP695 method and an alternate procedure were applied to SCBFs and NCBFs. NCBFs are designed without ductile detailing. The evaluation using P695 method shows contrary results to the alternate evaluation procedure and the current knowledge in which short-story SCBF structures are more venerable than taller counterparts and NCBFs are more vulnerable than SCBFs.

  18. 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.

  19. 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

  20. A Proposed RTN Officer Performance Evaluation System

    Science.gov (United States)

    1989-12-01

    Taa& No. WokI Unlit Acca ~def 11¶. TITLE (biclde Securiy ClassifiCation) A PROPOSED ROYAL THAI NAVY OFIICER PERFORM NCE EVALUATION SYSTEM 12. PERSONAL...Ii m -0-w ~~10- 1. - lie p1 - * -- --- trI I. JrI IE1 ... - ... . -- . .. t.J I I I - - r. .. . . ..- - ’gl ! i i - • - . • -- •..--.,J .. .a...opirt 6440W intvn soprirl illiphn. LklenL .win1111110.00 AF Forest 700. AUG 80 COMPANY GRlAVE OFFICESI P1 "flO1MANC6 l~.4 Figure 3,12 U.S. Air Force

  1. 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

  2. Performance evaluation of MPEG internet video coding

    Science.gov (United States)

    Luo, Jiajia; Wang, Ronggang; Fan, Kui; Wang, Zhenyu; Li, Ge; Wang, Wenmin

    2016-09-01

    Internet Video Coding (IVC) has been developed in MPEG by combining well-known existing technology elements and new coding tools with royalty-free declarations. In June 2015, IVC project was approved as ISO/IEC 14496-33 (MPEG- 4 Internet Video Coding). It is believed that this standard can be highly beneficial for video services in the Internet domain. This paper evaluates the objective and subjective performances of IVC by comparing it against Web Video Coding (WVC), Video Coding for Browsers (VCB) and AVC High Profile. Experimental results show that IVC's compression performance is approximately equal to that of the AVC High Profile for typical operational settings, both for streaming and low-delay applications, and is better than WVC and VCB.

  3. 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.

  4. 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.

  5. Performance indicators to evaluate Spatial Data Infrastructures

    Directory of Open Access Journals (Sweden)

    Lola Jiménez-Calderón

    2017-08-01

    Full Text Available The importance of geographic information in decision-making and the ability of Spatial Data Infrastructures to transform government actions from a spatial perspective have placed the IDE as a fundamental solution in decision-making at many levels. In view of its relevance and major investments in this area, there is great interest in different sectors of society to observe the impact of the IDE, its evolution and future scenarios. This creates the need for an assessment of its impact, to obtain an approximate measure the success of these initiatives. This requires the availability of reliable mechanisms of evaluation from different approaches and objectives, which does not prevent, despite having a wide variety of studies and proposals, remains a difficult task. As part of the evaluation and monitoring IDE there is a variety of approaches using performance indicators as valid to estimate their development mechanism. In this context it is noted, the effort of experts and organizations, by agreeing a method to evaluate the IDE on the one hand and to define indicators, which are the essential part of various methodological approaches on the other. Given that the indicators are principally a desire to measure, marked differences in purpose of evaluation, the name and scope of the indicators themselves are observed, which indicates there is still much work to be done. This article presents a comparative analysis of the use of indicators for monitoring and evaluation of IDE development, which has been considered the study of five major initiatives: IDEC of Catalonia, GIDEON the Netherlands, eSDI-Net + e INSPIRE European and UN-GGIM of America.

  6. Pedestrian Tracking Solution Combining an Impulse Radio Handset Transmitter with an Ankle-Mounted Inertial Measurement Unit

    Directory of Open Access Journals (Sweden)

    Joe Youssef

    2012-01-01

    Full Text Available We address the indoor tracking problem by combining an Impulse Radio-Ultra-Wideband handset with an ankle-mounted Inertial Measurement Unit embedding an accelerometer and a gyroscope. The latter unit makes possible the detection of the stance phases to overcome velocity drifts. Regarding radiolocation, a time-of-arrival estimator adapted to energy-based receivers is applied to mitigate the effects of dense multipath profiles. A novel quality factor associated with this estimator is also provided as a function of the received signal-to-noise ratio, enabling us to identify outliers corresponding to obstructed radio links and to scale the covariance matrix of radiolocation measurements. Finally, both radio and inertial subsystems are loosely-coupled into one single navigation solution relying on a specific extended Kalman filter. In the proposed fusion strategy, processed inertial data control the filter state prediction whereas Combined Time Differences Of Arrival are formed as input observations. These combinations offer low computational complexity as well as a unique filter structure over time, even after removing outliers. Experimental results obtained in a representatively harsh indoor environment emphasize the complementarity of the two technologies and the relevance of the chosen fusion method while operating with low-cost, noncollocated, asynchronous, and heterogeneous sensors.

  7. Ground truth and benchmarks for performance evaluation

    Science.gov (United States)

    Takeuchi, Ayako; Shneier, Michael; Hong, Tsai Hong; Chang, Tommy; Scrapper, Christopher; Cheok, Geraldine S.

    2003-09-01

    Progress in algorithm development and transfer of results to practical applications such as military robotics requires the setup of standard tasks, of standard qualitative and quantitative measurements for performance evaluation and validation. Although the evaluation and validation of algorithms have been discussed for over a decade, the research community still faces a lack of well-defined and standardized methodology. The range of fundamental problems include a lack of quantifiable measures of performance, a lack of data from state-of-the-art sensors in calibrated real-world environments, and a lack of facilities for conducting realistic experiments. In this research, we propose three methods for creating ground truth databases and benchmarks using multiple sensors. The databases and benchmarks will provide researchers with high quality data from suites of sensors operating in complex environments representing real problems of great relevance to the development of autonomous driving systems. At NIST, we have prototyped a High Mobility Multi-purpose Wheeled Vehicle (HMMWV) system with a suite of sensors including a Riegl ladar, GDRS ladar, stereo CCD, several color cameras, Global Position System (GPS), Inertial Navigation System (INS), pan/tilt encoders, and odometry . All sensors are calibrated with respect to each other in space and time. This allows a database of features and terrain elevation to be built. Ground truth for each sensor can then be extracted from the database. The main goal of this research is to provide ground truth databases for researchers and engineers to evaluate algorithms for effectiveness, efficiency, reliability, and robustness, thus advancing the development of algorithms.

  8. 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...

  9. 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...

  10. 48 CFR 1252.216-72 - Performance evaluation plan.

    Science.gov (United States)

    2010-10-01

    ... 48 Federal Acquisition Regulations System 5 2010-10-01 2010-10-01 false Performance evaluation....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...

  11. 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...

  12. 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.

  13. 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.

  14. 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.

  15. Performance evaluation of a computed radiography system

    Energy Technology Data Exchange (ETDEWEB)

    Roussilhe, J.; Fallet, E. [Carestream Health France, 71 - Chalon/Saone (France); Mango, St.A. [Carestream Health, Inc. Rochester, New York (United States)

    2007-07-01

    Computed radiography (CR) standards have been formalized and published in Europe and in the US. The CR system classification is defined in those standards by - minimum normalized signal-to-noise ratio (SNRN), and - maximum basic spatial resolution (SRb). Both the signal-to-noise ratio (SNR) and the contrast sensitivity of a CR system depend on the dose (exposure time and conditions) at the detector. Because of their wide dynamic range, the same storage phosphor imaging plate can qualify for all six CR system classes. The exposure characteristics from 30 to 450 kV, the contrast sensitivity, and the spatial resolution of the KODAK INDUSTREX CR Digital System have been thoroughly evaluated. This paper will present some of the factors that determine the system's spatial resolution performance. (authors)

  16. 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.

  17. Performance Evaluation of Photovoltaic Solar Air Conditioning

    Science.gov (United States)

    Snegirjovs, A.; Shipkovs, P.; Lebedeva, K.; Kashkarova, G.; Migla, L.; Gantenbein, P.; Omlin, L.

    2016-12-01

    Information on the electrical-driven solar air conditioning (SAC) is rather scanty. A considerable body of technical data mostly concerns large-scale photo-voltaic solar air conditioning (PV-SAC) systems. Reliable information about the energy output has arisen only in recent years; however, it is still not easily accessible, and sometimes its sources are closed. Despite these facts, solar energy researchers, observers and designers devote special attention to this type of SAC systems. In this study, performance evaluation is performed for the PV-SAC technology, in which low-power (up to 15 kWp of cooling power on average) systems are used. Such a system contains a PV electric-driven compression chiller with cold and heat sensible thermal storage capacities, and a rejected energy unit used for preheating domestic hot water (DHW). In a non-cooling season, it is possible to partly employ the system in the reverse mode for DHW production. In this mode, the ambient air serves as a heat source. Besides, free cooling is integrated in the PV-SAC concept.

  18. Performance Evaluation of Photovoltaic Solar Air Conditioning

    Directory of Open Access Journals (Sweden)

    Snegirjovs A.

    2016-12-01

    Full Text Available Information on the electrical-driven solar air conditioning (SAC is rather scanty. A considerable body of technical data mostly concerns large-scale photo-voltaic solar air conditioning (PV-SAC systems. Reliable information about the energy output has arisen only in recent years; however, it is still not easily accessible, and sometimes its sources are closed. Despite these facts, solar energy researchers, observers and designers devote special attention to this type of SAC systems. In this study, performance evaluation is performed for the PV-SAC technology, in which low-power (up to 15 kWp of cooling power on average systems are used. Such a system contains a PV electric-driven compression chiller with cold and heat sensible thermal storage capacities, and a rejected energy unit used for preheating domestic hot water (DHW. In a non-cooling season, it is possible to partly employ the system in the reverse mode for DHW production. In this mode, the ambient air serves as a heat source. Besides, free cooling is integrated in the PV-SAC concept.

  19. 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.

  20. 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...

  1. 48 CFR 3052.216-72 - Performance evaluation plan.

    Science.gov (United States)

    2010-10-01

    ... 48 Federal Acquisition Regulations System 7 2010-10-01 2010-10-01 false Performance evaluation... CONTRACT CLAUSES Text of Provisions and Clauses 3052.216-72 Performance evaluation plan. As prescribed in... Evaluation Plan (DEC 2003) (a) A Performance Evaluation Plan shall be unilaterally established by...

  2. The Construction of the Performance Management Teaching Portfolio Evaluation System

    Institute of Scientific and Technical Information of China (English)

    范华

    2016-01-01

    Two of the evaluation, Teaching Portfolio and Performance Management, have being introduced in this article, in order to lead to the construction of the Performance Management Teaching Portfolio Evaluation System.The Performance Manage-ment Teaching Portfolio Evaluation System has advantages of both Teaching Portfolio and Performance Management. The arti-cle also also has listed the elements and some examples of the Performance Management Teaching Portfolio Evaluation System.

  3. FORECASTING OF PERFORMANCE EVALUATION OF NEW VEHICLES

    Directory of Open Access Journals (Sweden)

    O. S. Krasheninin

    2016-12-01

    Full Text Available Purpose. The research work focuses on forecasting of performance evaluation of the tractive and non-tractive vehicles that will satisfy and meet the needs and requirements of the railway industry, which is constantly evolving. Methodology. Analysis of the technical condition of the existing fleet of rolling stock (tractive and non-tractive of Ukrainian Railways shows a substantial reduction that occurs in connection with its moral and physical wear and tear, as well as insufficient and limited purchase of new units of the tractive and non-tractive rolling stock in the desired quantity. In this situation there is a necessity of search of the methods for determination of rolling stock technical characteristics. One of such urgent and effective measures is to conduct forecasting of the defining characteristics of the vehicles based on the processes of their reproduction in conditions of limited resources using a continuous exponential function. The function of the growth rate of the projected figure degree for the vehicle determines the logistic characteristic that with unlimited resources has the form of an exponent, and with low ones – that of a line. Findings. The data obtained according to the proposed method allowed determining the expected (future value, that is the ratio of load to volume of the body for non-tractive rolling stock (gondola cars and weight-to-power for tractive rolling stock, the degree of forecast reliability and the standard forecast error, which show high prediction accuracy for the completed procedure. As a result, this will allow estimating the required characteristics of vehicles in the forecast year with high accuracy. Originality. The concept of forecasting the characteristics of the vehicles for decision-making on the evaluation of their prospects was proposed. Practical value. The forecasting methodology will reliably determine the technical parameters of tractive and non-tractive rolling stock, which will meet

  4. 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.

  5. 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.

  6. 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.

  7. 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.

  8. When Performance Trumps Gender Bias: Joint Versus Separate Evaluation

    OpenAIRE

    Bohnet, Iris; Van Geen, Alexandra Vivien; Max H. Bazerman

    2012-01-01

    We examine a new intervention to overcome gender biases in hiring, promotion, and job assignments: an “evaluation nudge,†in which people are evaluated jointly rather than separately regarding their future performance. Evaluators are more likely to focus on individual performance in joint than in separate evaluation and on group stereotypes in separate than in joint evaluation, making joint evaluation the money-maximizing evaluation procedure. Our findings are compatible with a behavioral ...

  9. In-Network Performance of Handheld Mobile Terminals

    DEFF Research Database (Denmark)

    Nielsen, Jesper Ødum; Pedersen, Gert Frølund

    2006-01-01

    are compared with the equivalent performance obtained in a live GSM network using data from the Abis network interface. This method does not require altering of the handsets and the testing uses normal calls in the network. The investigation is based on measurements with four different commercially available...

  10. User Influence on MIMO Channel Capacity for Handsets in Data Mode Operation

    DEFF Research Database (Denmark)

    Nielsen, Jesper Ødum; Yanakiev, Boyan Radkov; Bonev, Ivan Bonev;

    2012-01-01

    The current paper concerns realistic evaluation of the capacity of the MIMO channel between a BS and handheld device, such as a PDA or smartphone, held in front of the user’s body (data mode). The work is based on measurements of the MIMO channel between two widely separated BSs in a micro...

  11. 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...

  12. 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...

  13. 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...

  14. 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...

  15. 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...

  16. 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....

  17. Unsupervised Performance Evaluation of Image Segmentation

    Directory of Open Access Journals (Sweden)

    Chabrier Sebastien

    2006-01-01

    Full Text Available We present in this paper a study of unsupervised evaluation criteria that enable the quantification of the quality of an image segmentation result. These evaluation criteria compute some statistics for each region or class in a segmentation result. Such an evaluation criterion can be useful for different applications: the comparison of segmentation results, the automatic choice of the best fitted parameters of a segmentation method for a given image, or the definition of new segmentation methods by optimization. We first present the state of art of unsupervised evaluation, and then, we compare six unsupervised evaluation criteria. For this comparative study, we use a database composed of 8400 synthetic gray-level images segmented in four different ways. Vinet's measure (correct classification rate is used as an objective criterion to compare the behavior of the different criteria. Finally, we present the experimental results on the segmentation evaluation of a few gray-level natural images.

  18. Wideband high efficiency CMOS envelope amplifiers for 4G LTE handset envelope tracking RF power amplifiers

    OpenAIRE

    Hassan, Muhammad

    2012-01-01

    Fourth generation cellular networks offer performance similar to cable modems while allowing wide mobility. Although the use of orthogonal frequency division multiplexing in fourth generation increases its spectral efficiency but it also increases the peak-to-average power ratio of the transmitted signal. If a conventional power amplifier is used to transmit a high peak-to-average power ratio signal, then to meet the stringent linearity requirements, it will be operating 6 to 10 dB back-off f...

  19. Performance evaluation of Jepirachi Wind Park

    Energy Technology Data Exchange (ETDEWEB)

    Pinilla, Alvaro [Mechanical Engineering Department, Universidad de Los Andes, Cra 1 Este No. 18 A - 10, Bogota (Colombia); Rodriguez, Luis; Trujillo, Rodrigo [Generation Planning Management Office, Empresas Publicas de Medellin, Medellin (Colombia)

    2009-01-15

    This paper presents some technical details, operational experiences, and lessons learnt by the Colombian public utility - Empresas Publicas de Medellin - with a recently installed 19.5 MW wind park in the northern region of Colombia - province of La Guajira. This is the first ever wind park feeding to the electricity network in Colombia. The Jepirachi Wind Park was commissioned in April 2004 and it has to date accumulated nearly 180,000 h of operation. During that time 15 NORDEX N60/1.3 MW turbines have fed electricity to the Colombian main electricity grid. This work describes the park layout, including meteorological stations installed in the surroundings and the wind regime prevailing in the zone. Details are also given about remote monitoring of the Wind Park and individual turbines, through the Supervisory, Control and Data Acquisition system (SCADA Nordex Control 2). Since July 2004, Empresas Publicas de Medellin (EEPPM) and Universidad de Los Andes-Bogota, Colombia have been working together in a wind park performance monitoring programme. This has permitted both institutions to learn more rapidly matters relating to evaluation, planning and operation of wind parks exposed to extreme climatic conditions like those present in the semi-desert region of the Guajira. This work describes the wind park operation, where individual wind turbines have yielded monthly production capacity factors as high as 65-75%; values which are high when compared to similar turbines installed elsewhere. Accordingly, levels of electrical energy production of up to 1750 kWh/m{sup 2}-year per turbine have been measured, exceeding typical values reported in the wind energy literature. A series of operational and technical troubles have become evident, which are related to some of the particular features of the climate and the wind regime at the site of the Jepirachi Wind Park. Because of these local features it is suggested that a greater level of uncertainty (limiting the validity of

  20. 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.

  1. Performance evaluation of local colour invariants

    NARCIS (Netherlands)

    Burghouts, G.J.; Geusebroek, J.M.

    2009-01-01

    In this paper, we compare local colour descriptors to grey-value descriptors. We adopt the evaluation framework of Mikolayzcyk and Schmid. We modify the framework in several ways. We decompose the evaluation framework to the level of local grey-value invariants on which common region descriptors are

  2. Performance analysis of GYRO: a tool evaluation

    Energy Technology Data Exchange (ETDEWEB)

    Worley, P [Oak Ridge National Laboratory, PO Box 2008, Oak Ridge, TN 37831-6016 (United States); Candy, J [General Atomics, PO Box 85608, San Diego, CA 92186-5608 (United States); Carrington, L [San Diego Supercomputer Center, University of California, San Diego, 9500 Gilman Drive, La Jolla, California 92093-0505 (United States); Huck, K [Computer and Information Science Department, 1202 University of Oregon, Eugene, OR 97403-1202 (United States); Kaiser, T [San Diego Supercomputer Center, University of California, San Diego, 9500 Gilman Drive, La Jolla, California 92093-0505 (United States); Mahinthakumar, G [Department of Civil Engineering, North Carolina State University, Raleigh, NC 27695-7908 (United States); Malony, A [Computer and Information Science Department, 1202 University of Oregon, Eugene, OR 97403-1202 (United States); Moore, S [Innovative Computing Laboratory, University of Tennessee, 1122 Volunteer Blvd., Suite 413, Knoxville, TN 37996-3450 (United States); Reed, D [Renaissance Computing Institute, University of North Carolina at Chapel Hill, CB 7583, Carr Building, Chapel Hill, NC 27599-7583 (United States); Roth, P [Oak Ridge National Laboratory, PO Box 2008, Oak Ridge, TN 37831-6016 (United States); Shan, H [Lawrence Berkeley National Laboratory, Berkeley, CA 94720 (United States); Shende, S [Computer and Information Science Department, 1202 University of Oregon, Eugene, OR 97403-1202 (United States); Snavely, A [San Diego Supercomputer Center, Univ. of California, San Diego, 9500 Gilman Drive, La Jolla, California 92093-0505 (United States); Sreepathi, S [Dept. of Computer Science, North Carolina State Univ., Raleigh, NC 27695-7908 (United States); Wolf, F [Innovative Computing Lab., Univ. of Tennessee, 1122 Volunteer Blvd., Suite 413, Knoxville, TN 37996-3450 (United States); Zhang, Y [Renaissance Computing Inst., Univ. of North Carolina at Chapel Hill, CB 7583, Carr Building, Chapel Hill, NC 27599-7583 (United States)

    2005-01-01

    The performance of the Eulerian gyrokinetic-Maxwell solver code GYRO is analyzed on five high performance computing systems. First, a manual approach is taken, using custom scripts to analyze the output of embedded wallclock timers, floating point operation counts collected using hardware performance counters, and traces of user and communication events collected using the profiling interface to Message Passing Interface (MPI) libraries. Parts of the analysis are then repeated or extended using a number of sophisticated performance analysis tools: IPM, KOJAK, SvPablo, TAU, and the PMaC modeling tool suite. The paper briefly discusses what has been discovered via this manual analysis process, what performance analyses are inconvenient or infeasible to attempt manually, and to what extent the tools show promise in accelerating or significantly extending the manual performance analyses.

  3. Performance Analysis of GYRO: A Tool Evaluation

    Energy Technology Data Exchange (ETDEWEB)

    Worley, P.; Roth, P.; Candy, J.; Shan, Hongzhang; Mahinthakumar,G.; Sreepathi, S.; Carrington, L.; Kaiser, T.; Snavely, A.; Reed, D.; Zhang, Y.; Huck, K.; Malony, A.; Shende, S.; Moore, S.; Wolf, F.

    2005-06-26

    The performance of the Eulerian gyrokinetic-Maxwell solver code GYRO is analyzed on five high performance computing systems. First, a manual approach is taken, using custom scripts to analyze the output of embedded wall clock timers, floating point operation counts collected using hardware performance counters, and traces of user and communication events collected using the profiling interface to Message Passing Interface (MPI) libraries. Parts of the analysis are then repeated or extended using a number of sophisticated performance analysis tools: IPM, KOJAK, SvPablo, TAU, and the PMaC modeling tool suite. The paper briefly discusses what has been discovered via this manual analysis process, what performance analyses are inconvenient or infeasible to attempt manually, and to what extent the tools show promise in accelerating or significantly extending the manual performance analyses.

  4. 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.

  5. A Management System for Computer Performance Evaluation.

    Science.gov (United States)

    1981-12-01

    large unused capacity indicates a potential cost performance improvement (i.e. the potential to perform more within current costs or reduce costs ...necessary to bring the performance of the computer system in line with operational goals. : (Ref. 18 : 7) The General Accouting Office estimates that the...tasks in attempting to improve the efficiency and effectiveness of their computer systems. Cost began to plan an important role in the life of a

  6. Evaluation of Flowable Fill Surface Performance

    Science.gov (United States)

    2016-11-01

    criteria was used to develop performance curves for conventional USAF cementitious capping materials ( rapid -setting concrete). The failure criteria...greater than 2 in. deep across 50 percent of the spall length. Similar performance curves could be developed for rapid -setting flowable fill as a...structural performance of Rapid Set Concrete Mix®. ERDC/GSL TR-16- 20. Vicksburg, MS: U.S. Army Engineer Research and Development Center. ERDC/GSL TR-16-33

  7. Thermal Loss Becomes an Issue for Tunable Narrow-band Antennas in Fourth Generation Handsets

    DEFF Research Database (Denmark)

    Barrio, Samantha Caporal Del; Morris, Art; Pedersen, Gert Frølund

    2015-01-01

    Antenna tuning is a very promising technique to cope with the expansion of the mobile communication frequency spectrum. Tunable antennas can address a wide range of operating frequencies, while being highly integrated. In particular, high-Q antennas (also named narrow-band antennas) are very...... is not sufficient to explain the total loss of tunable antennas. It is found that thermal loss –because of the metal conductivity of the antenna itself – plays a major role in the loss mechanism of narrow-band tunable antennas. The investigated high-Q planar inverted F antenna designs exhibit a significant thermal...... loss; at 1400 MHz nearly 2 dB are lost solely because of the copper conductivity. Thermal loss poses a limitation to achievable performance of tunable antennas and to antenna miniaturisation....

  8. Performance Evaluation of DOA Estimation using MATLAB

    OpenAIRE

    Balabadrapatruni, Sai Suhas

    2012-01-01

    This paper presents the performance analysis of directions of arrival estimation techniques, Subspace and the Non-Subspace methods. In this paper, exploring the analysis category of high resolution and super resolution algorithms, presentation of description, comparison and the performance and resolution analyses of these algorithms are made. Sensitivity to various perturbations and the effect of parameters related to the design of the sensor array itself such as the number of array elements ...

  9. Performance Evaluation of Biometric Template Update

    CERN Document Server

    Giot, Romain; Dorizzi, Bernadette

    2012-01-01

    Template update allows to modify the biometric reference of a user while he uses the biometric system. With such kind of mechanism we expect the biometric system uses always an up to date representation of the user, by capturing his intra-class (temporary or permanent) variability. Although several studies exist in the literature, there is no commonly adopted evaluation scheme. This does not ease the comparison of the different systems of the literature. In this paper, we show that using different evaluation procedures can lead in different, and contradictory, interpretations of the results. We use a keystroke dynamics (which is a modality suffering of template ageing quickly) template update system on a dataset consisting of height different sessions to illustrate this point. Even if we do not answer to this problematic, it shows that it is necessary to normalize the template update evaluation procedures.

  10. 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...

  11. 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…

  12. 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...

  13. 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...

  14. 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...

  15. Performance evaluation of matrix gradient coils.

    Science.gov (United States)

    Jia, Feng; Schultz, Gerrit; Testud, Frederik; Welz, Anna Masako; Weber, Hans; Littin, Sebastian; Yu, Huijun; Hennig, Jürgen; Zaitsev, Maxim

    2016-02-01

    In this paper, we present a new performance measure of a matrix coil (also known as multi-coil) from the perspective of efficient, local, non-linear encoding without explicitly considering target encoding fields. An optimization problem based on a joint optimization for the non-linear encoding fields is formulated. Based on the derived objective function, a figure of merit of a matrix coil is defined, which is a generalization of a previously known resistive figure of merit for traditional gradient coils. A cylindrical matrix coil design with a high number of elements is used to illustrate the proposed performance measure. The results are analyzed to reveal novel features of matrix coil designs, which allowed us to optimize coil parameters, such as number of coil elements. A comparison to a scaled, existing multi-coil is also provided to demonstrate the use of the proposed performance parameter. The assessment of a matrix gradient coil profits from using a single performance parameter that takes the local encoding performance of the coil into account in relation to the dissipated power.

  16. Subjective performance evaluations and employee careers

    DEFF Research Database (Denmark)

    Frederiksen, Anders; Lange, Fabian; Kriechel, Ben

    such data are for evaluating theories in personnel economics and whether findings from such data generalize to the labor force at large. In this paper, we examine personnel data from six large companies and establish how subjective ratings, interpreted as ordinal rankings of employees within narrowly...

  17. 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...

  18. Subjective performance evaluations and employee careers

    DEFF Research Database (Denmark)

    Frederiksen, Anders; Lange, Fabian; Kriechel, Ben

    such data are for evaluating theories in personnel economics and whether findings from such data generalize to the labor force at large. In this paper, we examine personnel data from six large companies and establish how subjective ratings, interpreted as ordinal rankings of employees within narrowly...

  19. Performance Evaluation of Balanced Pension Plans

    NARCIS (Netherlands)

    L. Andreu (Laura); L.A.P. Swinkels (Laurens)

    2009-01-01

    textabstractThis paper examines the ability of balanced pension plan managers to successfully time the equity and bond market and select the appropriate assets within these markets. In order to evaluate both market timing abilities in these balanced pension plans, we extend the traditional equity ma

  20. 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.

  1. Performance evaluation of 1 kw PEFC

    Energy Technology Data Exchange (ETDEWEB)

    Komaki, Hideaki [Ishikawajima-Harima Heavy Industries Co., Ltd. Tokyo (Japan); Tsuchiyama, Syozo [Shipbuilding Research Association, Minato-ky, Tokyo (Japan)

    1996-12-31

    This report covers part of a joint study on a PEFC propulsion system for surface ships, summarized in a presentation to this Seminar, entitled {open_quote}Study on a PEFC Propulsion System for Surface Ships{close_quotes}, and which envisages application to a 1,500 DWT cargo vessel. The aspect treated here concerns the effects brought on PEFC operating performance by conditions particular to shipboard operation. The performance characteristics were examined through tests performed on a 1 kw stack and on a single cell (Manufactured by Fuji Electric Co., Ltd.). The tests covered the items (1) to (4) cited in the headings of the sections that follow. Specifications of the stack and single cell are as given.

  2. Performance evaluation of SAR/GMTI algorithms

    Science.gov (United States)

    Garber, Wendy; Pierson, William; Mcginnis, Ryan; Majumder, Uttam; Minardi, Michael; Sobota, David

    2016-05-01

    There is a history and understanding of exploiting moving targets within ground moving target indicator (GMTI) data, including methods for modeling performance. However, many assumptions valid for GMTI processing are invalid for synthetic aperture radar (SAR) data. For example, traditional GMTI processing assumes targets are exo-clutter and a system that uses a GMTI waveform, i.e. low bandwidth (BW) and low pulse repetition frequency (PRF). Conversely, SAR imagery is typically formed to focus data at zero Doppler and requires high BW and high PRF. Therefore, many of the techniques used in performance estimation of GMTI systems are not valid for SAR data. However, as demonstrated by papers in the recent literature,1-11 there is interest in exploiting moving targets within SAR data. The techniques employed vary widely, including filter banks to form images at multiple Dopplers, performing smear detection, and attempting to address the issue through waveform design. The above work validates the need for moving target exploitation in SAR data, but it does not represent a theory allowing for the prediction or bounding of performance. This work develops an approach to estimate and/or bound performance for moving target exploitation specific to SAR data. Synthetic SAR data is generated across a range of sensor, environment, and target parameters to test the exploitation algorithms under specific conditions. This provides a design tool allowing radar systems to be tuned for specific moving target exploitation applications. In summary, we derive a set of rules that bound the performance of specific moving target exploitation algorithms under variable operating conditions.

  3. Style Analysis and Performance Evaluation of Dutch Mutual Funds

    NARCIS (Netherlands)

    Ter Horst, J.R.; Nijman, T.E.; de Roon, F.A.

    1998-01-01

    In this paper we show how style analysis of mutual funds can be used to circumvent the problem of self-reported investment styles, and to improve relative performance evaluation. Subsequently, we relate style analysis to performance evaluation and present results on the performance of Dutch mutual f

  4. PERFORMANCE EVALUATION OF CHINESE NEW FUNDS

    Institute of Scientific and Technical Information of China (English)

    倪苏云; 翁轶丛; 吴冲锋

    2001-01-01

    he performance of Chinese investment funds was empirically analyzed using the following models, i.e. Jensen model, Treynor-Mazuy (T-M) model amd Merton-Henriksson model. The results show that T-M model is fitted to Chinese investment funds best among these three. But none of them can perfectly interpret the new funds' performance. So, the idea suggested by Jagannathan, Korajczyk (J-K) to extend the test was adopted in this paper, and the results show that J-K model augmented from the M-H can explain the source of excess return of fund Anxin.

  5. Simulating Radar Signals for Detection Performance Evaluation.

    Science.gov (United States)

    1981-02-01

    constant false alarm rate (CFAR) processing, and non- linear operations. The detection performance is determined by Monte Carlo sampling techniques...AND DSIH. 0213 r C21.c FROtRAW By NCRPAN FRENK ~R FROM TI-E BASIC ALGOVITI4 BY EH9RLES 01 C RADER (BOTH OF vfIT LINCOLN LAPORATCRYi. MAY 1967. THE

  6. Performance evaluation of a liquid solar collector

    Science.gov (United States)

    1979-01-01

    Report describes thermal performance and structural-load tests on commercial single glazed flat-plate solar collector with gross area of 63.5 sq ft that uses water as heat-transfer medium. Report documents test instrumentation and procedures and presents data as tables and graphs. Results are analyzed by standard data-reduction methods.

  7. 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.

  8. Emergency Physician Performed Ultrasound for DVT Evaluation

    Directory of Open Access Journals (Sweden)

    John Christian Fox

    2011-01-01

    Full Text Available Deep vein thrombosis is a common condition that is often difficult to diagnose and may be lethal when allowed to progress. However, early implementation of treatment substantially improves the disease prognosis. Therefore, care must be taken to both acquire an accurate differential diagnosis for patients with symptoms as well as to screen at-risk asymptomatic individuals. Many diagnostic tools exist to evaluate deep vein thrombosis. Compression ultrasonography is currently the most effective diagnostic tool in the emergency department, shown to be highly accurate at minimal expense. However, limited availability of ultrasound technicians may result in delayed imaging or in a decision not to image low-risk cases. Many studies support emergency physiciansas capable of accurately diagnosing deep vein thrombosis using bedside ultrasound. Further integration of ultrasound into the training of emergency physicians for use in evaluating deep vein thrombosis will improve patient care and cost-effective treatment.

  9. An urban energy performance evaluation system and its computer implementation.

    Science.gov (United States)

    Wang, Lei; Yuan, Guan; Long, Ruyin; Chen, Hong

    2017-09-26

    To improve the urban environment and effectively reflect and promote urban energy performance, an urban energy performance evaluation system was constructed, thereby strengthening urban environmental management capabilities. From the perspectives of internalization and externalization, a framework of evaluation indicators and key factors that determine urban energy performance and explore the reasons for differences in performance was proposed according to established theory and previous studies. Using the improved stochastic frontier analysis method, an urban energy performance evaluation and factor analysis model was built that brings performance evaluation and factor analysis into the same stage for study. According to data obtained for the Chinese provincial capitals from 2004 to 2013, the coefficients of the evaluation indicators and key factors were calculated by the urban energy performance evaluation and factor analysis model. These coefficients were then used to compile the program file. The urban energy performance evaluation system developed in this study was designed in three parts: a database, a distributed component server, and a human-machine interface. Its functions were designed as login, addition, edit, input, calculation, analysis, comparison, inquiry, and export. On the basis of these contents, an urban energy performance evaluation system was developed using Microsoft Visual Studio .NET 2015. The system can effectively reflect the status of and any changes in urban energy performance. Beijing was considered as an example to conduct an empirical study, which further verified the applicability and convenience of this evaluation system. Copyright © 2017 Elsevier Ltd. All rights reserved.

  10. Evaluating the Performance of Administrators: The Process and the Tools.

    Science.gov (United States)

    Herman, Jerry J.

    1991-01-01

    Describes the various roles (monitor, information gatherer, communicator and feedback provider, clarifier, coanalyzer, assister, resource provider, and motivator) played by the supervisor when evaluating administrators. Presents a sample evaluation instrument assessing five major performance areas (management, professionalism, leadership,…

  11. Performance Evaluation of Wormhole Attack In AODV

    Directory of Open Access Journals (Sweden)

    Samuel Jacob

    2015-02-01

    Full Text Available The Mobile Ad hoc Networks (MANETs is a collection of wireless nodes which interact with each other by sending packets to one another or on behalf of another node, without any central network infrastructure to control data routing. For communication, the nodes cooperatively forward data packets to other nodes in network by using the routing protocol. But, these routing protocols are not secure, thus paving the way for the MANET to be open to malicious attacks. A malicious attack which is commonly observed in MANET environment is wormhole attack. The objective of this work is to analyze the performance parameters of throughput, delay and packet loss in AODV with the existence of wormhole attack. Simulation results have shown that the performance parameters are affected very much when there is an attack due to wormholes.

  12. Supply Chain Performance Evaluation: Trends and Challenges

    OpenAIRE

    Ezutah U. Olugu; Kuan Y. Wong

    2009-01-01

    Problem statement: In todays 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 manag...

  13. Brookfield Homes Passive House Performance Evaluation

    Energy Technology Data Exchange (ETDEWEB)

    Herk, A. [IBACOS, Inc., Pittsburgh, PA (United States); Poerschke, A. [IBACOS, Inc., Pittsburgh, PA (United States); Beach, R. [IBACOS, Inc., Pittsburgh, PA (United States)

    2016-02-01

    In 2012-2013, IBACOS worked with a builder, Brookfield Homes in Denver, Colorado, to design and construct a Passive House certified model home. IBACOS used several modeling programs and calculation methods to complete the final design package along with Brookfield's architect KGA Studio. This design package included upgrades to the thermal enclosure, basement insulation, windows, and heating, ventilation, and air conditioning. Short-term performance testing in the Passive House was done during construction and after construction.

  14. Evaluating current processors performance and machines stability

    CERN Document Server

    Esposito, R; Tortone, G; Taurino, F M

    2003-01-01

    Accurately estimate performance of currently available processors is becoming a key activity, particularly in HENP environment, where high computing power is crucial. This document describes the methods and programs, opensource or freeware, used to benchmark processors, memory and disk subsystems and network connection architectures. These tools are also useful to stress test new machines, before their acquisition or before their introduction in a production environment, where high uptimes are requested.

  15. Performance evaluation of photonic Sigma Delta ADCS

    OpenAIRE

    Tan, Yean Wee

    2010-01-01

    Approved for public release; distribution is unlimited The integration of photonic and electronic components to realize a photonic sigma delta ADC is considered in this thesis. The integration process was broken up into steps. First, the performance of a pair of dual-port Mach-Zehnder interferometers (MZI) modulating a train of narrow high-speed laser pulses from a mode-locked laser was investigated. Various parameters like the half-wave voltage (V) and insertion loss were verified. Nex...

  16. Performance Evaluation Method for Dissimilar Aircraft Designs

    Science.gov (United States)

    Walker, H. J.

    1979-01-01

    A rationale is presented for using the square of the wingspan rather than the wing reference area as a basis for nondimensional comparisons of the aerodynamic and performance characteristics of aircraft that differ substantially in planform and loading. Working relationships are developed and illustrated through application to several categories of aircraft covering a range of Mach numbers from 0.60 to 2.00. For each application, direct comparisons of drag polars, lift-to-drag ratios, and maneuverability are shown for both nondimensional systems. The inaccuracies that may arise in the determination of aerodynamic efficiency based on reference area are noted. Span loading is introduced independently in comparing the combined effects of loading and aerodynamic efficiency on overall performance. Performance comparisons are made for the NACA research aircraft, lifting bodies, century-series fighter aircraft, F-111A aircraft with conventional and supercritical wings, and a group of supersonic aircraft including the B-58 and XB-70 bomber aircraft. An idealized configuration is included in each category to serve as a standard for comparing overall efficiency.

  17. Performance Evaluation of an Axysimmetric Floating OWC

    DEFF Research Database (Denmark)

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

    2010-01-01

    the wave energy is extracted through the relative displacement between the structure and the internal free surface. The paper presents in detail the methodology applied to define, from the hydrodynamic point of view, the device geometry. The numerical code used is a three-dimensional radiation......-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...

  18. Performance Evaluation of List Sphere Detector

    Institute of Scientific and Technical Information of China (English)

    HE Xiang; LUO Han-wen; YI Yang

    2005-01-01

    A list sphere detector can use a smaller list than commonly believed by employing an appropriate soft output approximation method. Its effect on the "quality" of detector's soft output value is evaluated by measuringmutual information under ergodic channel. The result shows a length 40 list is adequate for a 4 × 4 16QAM MIMO system without system-level iteration. For the ergodic channel, the gain of a sphere detector over the linear MMSE detector is dependent on channel coding rate, which answers an important question when sphere detector should be used in system level design. All these theoretical results are then verified by Monte Carlo simulation.

  19. 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.

  20. Motor performance after neonatal extracorporeal membrane oxygenation: a longitudinal evaluation

    NARCIS (Netherlands)

    Cammen-Zijp, M.H. van der; Janssen, A.J.W.M.; Raets, M.M.; Rosmalen, J. van; Govaert, P.; Steiner, K.; Gischler, S.J.; Tibboel, D.; Heijst, A.F.J. van; Ijsselstijn, H.

    2014-01-01

    OBJECTIVE: To assess longitudinally children's motor performance 5 to 12 years after neonatal extracorporeal membrane oxygenation (ECMO) and to evaluate associations between clinical characteristics and motor performance. METHODS: Two hundred fifty-four neonatal ECMO survivors in the Netherlands wer

  1. PERFORMANCE EVALUATION OF TYPE I MARINE SANITATION DEVICES

    Science.gov (United States)

    This performance test was designed to evaluate the effectiveness of two Type I Marine Sanitation Devices (MSDs): the Electro Scan Model EST 12, manufactured by Raritan Engineering Company, Inc., and the Thermopure-2, manufactured by Gross Mechanical Laboratories, Inc. Performance...

  2. A Novel Evaluation Indicator System and Evaluation Method for Supply Chain Performance of Food Production

    Directory of Open Access Journals (Sweden)

    Zhai Xiyao

    2015-02-01

    Full Text Available Supply chain performance evaluation is a research hotspot and lies in the core status in supply chain management. The study presents a new evaluation indicator system and evaluation algorithm for supply chain performance. First, the balanced score card is used to construct an evaluation indicator system for supply chain performance evaluation through analyzing the basic principle and connotation characteristics of supply chain management; Second analytic hierarchy process and fuzzy comprehensive evaluation algorithms are combined to satisfy the dynamic, subjective and transitional characteristics of evaluation indicators and improve evaluation accuracy. Thirdly the evaluation indicator system and evaluation algorithm are used in supply chain performance evaluation of fresh food products and the experimental results shows that the presented evaluation indicator system and evaluation algorithm has satisfied validity and feasibility.

  3. Safety performance evaluation of taekwondo headgear.

    Science.gov (United States)

    O'Sullivan, David M; Fife, Gabriel P; Pieter, Willy; Shin, Insik

    2013-05-01

    With over 20 years of taekwondo concussion research highlighting the high incidence of injury, previous studies recommend an investigation of headgear impact attenuation performance. To examine impact attenuation differences between the anterior, posterior and sides of selected taekwondo headgear brands. Between-groups. Biomechanics laboratory. Five different commercially available taekwondo headgear were selected for impact testing. A 50th percentile Hybrid II Dummy Crash Test head and neck was fitted with the selected helmet and was bolted to a 25 kg steel torso-like structure. Each headgear model was impacted eight times to the anterior, posterior and sides by a 6.75 kg bowling ball at three heights to produce 52.25, 85 and 144 J strikes. Resultant head linear acceleration. Two-way (Helmet×Location) mixed analysis of variance with repeated measures on the second factor was performed to determine the differences between headgear by location of impact. There was a two-way (Helmet×Location) interaction for acceleration (η(2)=0.368). Taekwondo headgear manufacturers and sport governing bodies must consider improving the design of especially anterior helmet properties.

  4. Performance Evaluation of Wave Energy Converters

    DEFF Research Database (Denmark)

    Pecher, Arthur

    Ocean waves provide a sustainable, power-dense, predictable and widely available source of energy that could provide about 10 % of worlds energy needs. While research into waveenergy has been undertaken for decades, a significant increase in related activities has been seen in the recent years......, with more than 150 concepts currently being developed worldwide. Wave energy conversion concepts can be of many kinds, as the energy in the waves can be absorbed in many different ways. However, each concept is expected to require a thorough development process, involving different phases and prototypes....... Guidelines for the development of wave energy converters recommend the use of different prototypes, having different sizes, which have to perform tank tests or sea trials. Thisimplicates the need of different testing environment, which shifts from being controllable to uncontrollable with the development...

  5. Performance Evaluation of Wave Energy Converters

    DEFF Research Database (Denmark)

    Pecher, Arthur

    Ocean waves provide a sustainable, power-dense, predictable and widely available source of energy that could provide about 10 % of worlds energy needs. While research into wave energy has been undertaken for decades, a significant increase in related activities has been seen in the recent years......, with more than 150 concepts currently being developed worldwide. Wave energy conversion concepts can be of many kinds, as the energy in the waves can be absorbed in many different ways. However, each concept is expected to require a thorough development process, involving different phases and prototypes....... Guidelines for the development of wave energy converters recommend the use of different prototypes, having different sizes, which have to perform tank tests or sea trials. This implicates the need of different testing environment, which shifts from being controllable to uncontrollable with the development...

  6. Performance Evaluation Of A Solar Still

    Directory of Open Access Journals (Sweden)

    Ugwuoke E.C

    2015-08-01

    Full Text Available ABSTRACT There is an urgent need for clean potable water in many countries of the world including Nigeria. While most urban populations have access to clean potable water many people in rural areas do not. There are many ways that can be used to improve the quality of water and one way is through distillation. This work aimed at producing potable water from brackish water for both rural and urban dwellers. The solar distillation plant used in this experiment has collecting area of 0.68 m2 . The emissivity of glass cover and absorbtivity of the absorber plate are 0.85 and 0.93 respectively. The experiment performed gave maximum distillate of 2.3 litres on day 5 and maximum temperature of 54C on day 5. From fig 2-6 it was observed that as solar intensity increases the higher the production of distillate.

  7. PERFORMANCE EVALUATION OF MULTICRYPT ENCRYPTION MECHANISM

    Directory of Open Access Journals (Sweden)

    John Prakash Arockiasamy

    2012-01-01

    Full Text Available Multicast communication allows a single message packet to be routed to multiple nodes simultaneously. Membership in a multicast group is dynamic, allowing nodes to enter and leave the multicast session. Besides the benefits, multicast communication presents the challenge of securing the communication. In order to preserve confidentiality the general encryption mechanism used for point to point communications are used. A specific encryption mechanism rather a general one is needed to suit the multicast communication requirements wherein the life time of a secret key is very short and requires a frequent change. Moreover, the next generation wireless networks have very limited resources and need a light weight security mechanism. The proposed cipher, Multicrypt, is similar to the One Time Pad and Hill cipher based on a sub band coding scheme using the principle of Orthogonal Vectors. The proposed cipher is based on the assumption of Computational Diffie Hellman problem and insolvability of Hadamard conjecture. It is designed to have multiple keys to decrypt the message like asymmetric cryptosystem so that a (key compromise of a member would not lead to compromise of the entire system, less computational and communicational overheads, less storage complexity and there is no need for state-full members. This study also presents an extensive security analysis and the performance analysis with RSA, a public key encryption mechanism used to establish session keys. With the help of security analysis the study proves that brute force attack does not compromise the system. Multicrypt cryptosystem has the capability of dynamically adding and revoking members. The performance of Multicrypt is relatively better in terms of key setup time, encryption time, decryption time, encryption throughput and decryption throughput than RSA in the simulated setup. The proposed cipher is also proved to be secure against IND-CPA and IND-CCA attacks.

  8. Evaluation of PV Module Field Performance

    Energy Technology Data Exchange (ETDEWEB)

    Wohlgemuth, John; Silverman, Timothy; Miller, David C.; McNutt, Peter; Kempe, Michael; Deceglie, Michael

    2015-06-14

    This paper describes an effort to inspect and evaluate PV modules in order to determine what failure or degradation modes are occurring in field installations. This paper will report on the results of six site visits, including the Sacramento Municipal Utility District (SMUD) Hedge Array, Tucson Electric Power (TEP) Springerville, Central Florida Utility, Florida Solar Energy Center (FSEC), the TEP Solar Test Yard, and University of Toledo installations. The effort here makes use of a recently developed field inspection data collection protocol, and the results were input into a corresponding database. The results of this work have also been used to develop a draft of the IEC standard for climate and application specific accelerated stress testing beyond module qualification. TEP Solar Test Yard, and University of Toledo installations. The effort here makes use of a recently developed field inspection data collection protocol, and the results were input into a corresponding database. The results of this work have also been used to develop a draft of the IEC standard for climate and application specific accelerated stress testing beyond module qualification. TEP Solar Test Yard, and University of Toledo installations. The effort here makes use of a recently developed field inspection data collection protocol, and the results were input into a corresponding database. The results of this work have also been used to develop a draft of the IEC standard for climate and application specific accelerated stress testing beyond module qualification.

  9. Procedure for evaluating measurement system performance: a case study

    Science.gov (United States)

    Hershey, Robert R.; Elliott, Richard C.

    1995-05-01

    This paper presents the methodology used to perform an evaluation of automated CD metrology SEMs for sub-half micron process control. The paper describes the evaluation strategy, the procedure used to collect and analyze the evaluation data and concludes with recommendations on how the procedure can be improved. The evaluation process was designed to estimate metrology capability and review specific application requirements envisioned for a leading edge semiconductor development and manufacturing facility at Motorola. The evaluation process consisted of a quantitative evaluation of measurement performance specifically examining the reproducibility, linearity, automation success rate, and throughput of the instrument. In addition, capabilities such as user interface, computer integration, job transportability, and technology roadmap were assessed qualitatively. Although a particular evaluation of automated CD SEMs is considered here, the principles used to develop the evaluation procedure can be applied to metrology tools in general. A discussion of the application and desired functionality of CD metrology instrumentation including performance criteria is presented for completeness.

  10. Brookfield Homes Passive House Performance Evaluation

    Energy Technology Data Exchange (ETDEWEB)

    Herk, A. [IBACOS, Inc., Pittsburgh, PA (United States); Poerschke, A. [IBACOS, Inc., Pittsburgh, PA (United States); Beach, R. [IBACOS, Inc., Pittsburgh, PA (United States)

    2016-02-04

    In 2012-2013, IBACOS worked with a builder, Brookfield Homes in Denver, Colorado, to design and construct a Passive House certified model home. IBACOS used several modeling programs and calculation methods to complete the final design package along with Brookfield's architect KGA Studio. This design package included upgrades to the thermal enclosure, basement insulation, windows, and heating, ventilation, and air conditioning. Short-term performance testing in the Passive House was done during construction and after construction. Testing with a blower door indicated that whole-building air leakage to the outside was 324 CFM and 0.60 ACH50. The other two test homes had little short-term testing done post-construction by the local energy rater. IBACOS then monitored the energy consumption and whole-house comfort conditions of that occupied Passive House after one year of operation and compared the monitoring results to those for two other occupied test houses in the same area with similar square footage but slightly different floor plans. IBACOS also assisted the builder, Brookfield Homes, in researching design scenarios for Zero Energy Ready Home and ENERGY STAR acceptance levels. IBACOS also assisted Brookfield in conceptualizing product for Denver's Brighton Heights area. Brookfield was considering building to Zero Energy Ready Home standards in that location. IBACOS provided strategies that Brookfield may draw from in the event the builder chooses to pursue a Zero Energy Ready Home plan for that market.

  11. Performance evaluation methods and instrumentation for mine ventilation fans

    Institute of Scientific and Technical Information of China (English)

    LI Man; WANG Xue-rong

    2009-01-01

    Ventilation fans are one of the most important pieces of equipment in coal mines. Their performance plays an important role in the safety of staff and production. Given the actual requirements of coal mine production, we instituted a research project on the measurement methods of key performance parameters such as wind pressure, amount of ventilation and power. At the end a virtual instrument for mine ventilation fans performance evaluation was developed using a USB interface. The practical perform-ance and analytical results of our experiments show that it is feasible, reliable and effective to use the proposed instrumentation for mine ventilation performance evaluation.

  12. Performance evaluation of salivary amylase activity monitor.

    Science.gov (United States)

    Yamaguchi, Masaki; Kanemori, Takahiro; Kanemaru, Masashi; Takai, Noriyasu; Mizuno, Yasufumi; Yoshida, Hiroshi

    2004-10-15

    In order to quantify psychological stress and to distinguish eustress and distress, we have been investigating the establishment of a method that can quantify salivary amylase activity (SMA). Salivary glands not only act as amplifiers of a low level of norepinephrine, but also respond more quickly and sensitively to psychological stress than cortisol levels. Moreover, the time-course changes of the salivary amylase activity have a possibility to distinguish eustress and distress. Thus, salivary amylase activity can be utilized as an excellent index for psychological stress. However, in dry chemistry system, a method for quantification of the enzymatic activity still needs to be established that can provide with sufficient substrate in a testing tape as well as can control enzymatic reaction time. Moreover, it is necessary to develop a method that has the advantages of using saliva, such as ease of collection, rapidity of response, and able to use at any time. In order to establish an easy method to monitor the salivary amylase activity, a salivary transcription device was fabricated to control the enzymatic reaction time. A fabricated salivary amylase activity monitor consisted of three devices, the salivary transcription device, a testing-strip and an optical analyzer. By adding maltose as a competitive inhibitor to a substrate Ga1-G2-CNP, a broad-range activity testing-strip was fabricated that could measure the salivary amylase activity with a range of 0-200 kU/l within 150 s. The calibration curve of the monitor for the salivary amylase activity showed R2=0.941, indicating that it was possible to use this monitor for the analysis of the salivary amylase activity without the need to determine the salivary volume quantitatively. In order to evaluate the assay variability of the monitor, salivary amylase activity was measured using Kraepelin psychodiagnostic test as a psychological stressor. A significant difference of salivary amylase activity was recognized

  13. 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

  14. Performances evaluation of different open source

    Directory of Open Access Journals (Sweden)

    Arun Patel

    2016-06-01

    Full Text Available In Open sources DEMs such as SRTM, ASTER and Cartosat-1, various factors affecting the accuracy of satellite based DEM such as errors during data collection, systematic errors and unknown errors that are geographically dependent on terrain conditions cannot be avoided. For these reasons it is very necessary to check and compare the performances and validation of the above mentioned different satellite based DEMs. Accuracy assessment of these DEM has been done using DGPS points. For these points proper interpolation of the surface was developed using different interpolation techniques. For the generation of the surface the first step was converting the satellite based DEMs height into linear interpolation contour maps of 1 m interval. Then came selecting random sample points on the contour line and generating the interpolated surface using different interpolation techniques such as IDW, GPI, RBF, OK and UK, LPI, TR and BI, which are commonly used in geomorphology research. This interpolated surface helps in proper representation of the terrain and was checked under different terrain surfaces. For validation of DGPS points the height was taken for ground control points and standard statistical tests such as ME and RMSE were applied. From above investigation, it is reveals that above mention DEMs which are used for study. Cartosat-1 (30 m data product is better than SRTM (90 m and ASTER (30 m because it had produced low RMSE of 3.49 m without applying the interpolation method. Investigation also reveals after applying the interpolation techniques on this data error can be reduced. In the case of Cartosat-1 and SRTM, low RMSE and ME were produced by the BI method, where Cartosat-1 DEM had an RMSE of 3.36 m with ME of −2.74 m, respectively. But in this case, RMSE and ME of SRTM is 2.73 m and −0.36 m, respectively. BI is designed for image processing and can be used for imagery were a maximum height variation in satellite DEM and terrain

  15. Performance evaluation of the fixed relay in OFDMA systems

    Institute of Scientific and Technical Information of China (English)

    Gao Peng; Wu Xiaoyan; Meng Dexiang; Chen Yanming; Tu Guofang

    2010-01-01

    Performance of fixed relays in orthogonal frequency division multiple access (OFDMA) systems, especially the coverage and capacity performance at the cell edge, is evaluated in this paper.Two methods, theoretical analysis and calculation and Monte Carlo simulation, are used for the evaluations.By theoretical analysis and calculation, frequency efficiency equation of a relay is introduced and numerical results are calculated.Monte Carlo simulation results also verify that the calculation method is reasonable.The evaluation shows that a relay can increase system performance to a certain level if it is designed appropriately, otherwise it will be harmful for the system performance, even to reduce it.

  16. At-Risk Youth Appearance and Job Performance Evaluation

    Science.gov (United States)

    Freeburg, Beth Winfrey; Workman, Jane E.

    2008-01-01

    The goal of this study was to identify the relationship of at-risk youth workplace appearance to other job performance criteria. Employers (n = 30; each employing from 1 to 17 youths) evaluated 178 at-risk high school youths who completed a paid summer employment experience. Appearance evaluations were significantly correlated with evaluations of…

  17. 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.

  18. 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.

  19. Concluding Thoughts: Observing, Promoting, Evaluating, and Reviewing Research Performance.

    Science.gov (United States)

    Creswell, John W.

    1986-01-01

    When institutional personnel assess faculty research performance, they should consider the extent to which the institution rewards research, ways to encourage faculty to be productive, criteria for evaluating research performance, and the specific steps useful in reviewing research performance within academic units. (Author/MSE)

  20. Concluding Thoughts: Observing, Promoting, Evaluating, and Reviewing Research Performance.

    Science.gov (United States)

    Creswell, John W.

    1986-01-01

    When institutional personnel assess faculty research performance, they should consider the extent to which the institution rewards research, ways to encourage faculty to be productive, criteria for evaluating research performance, and the specific steps useful in reviewing research performance within academic units. (Author/MSE)

  1. 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.

  2. Performance evaluation of quality monitor models in spot welding

    Institute of Scientific and Technical Information of China (English)

    Zhang Zhongdian; Li Dongqing; Wang Kai

    2005-01-01

    Performance of quality monitor models in spot welding determines the monitor precision directly, so it's crucial to evaluate it. Previously, mean square error ( MSE ) is often used to evaluate performances of models, but it can only show the total errors of finite specimens of models, and cannot show whether the quality information inferred from models are accurate and reliable enough or not. For this reason, by means of measure error theory, a new way to evaluate the performances of models according to the error distributions is developed as follows: Only if correct and precise enough the error distribution of model is, the quality information inferred from model is accurate and reliable.

  3. PERFORMANCE EVALUATION OF PENSION FUNDS WITH FUZZY EXPERT SYSTEM

    Directory of Open Access Journals (Sweden)

    SERDAR KORUKOĞLU

    2013-06-01

    Full Text Available Financial rating and ranking firms often use linguistic instead of numerical values. When input data are mostly qualitative and are based on subjective knowledge of experts, the Fuzzy Set Theory provides a solid mathematical model to represent and handle these data. The aim of this study is developing a fuzzy expert model to evaluate the performance of the pension funds by using their risk and return values. The method is used for evaluating the performance of the randomly selected of twenty seven Turkish pension funds. The obtained results proved that the fuzzy expert system is appropriate and consistent for performance evaluation.

  4. Citation ranking versus peer evaluation of senior faculty research performance

    DEFF Research Database (Denmark)

    Meho, Lokman I.; Sonnenwald, Diane H.

    2000-01-01

    The purpose of this study is to analyze the relationship between citation ranking and peer evaluation in assessing senior faculty research performance. Other studies typically derive their peer evaluation data directly from referees, often in the form of ranking. This study uses two additional...... of research appear to be needed to effectively evaluate senior scholars whose performance ranks relatively in the middle. Citation content analysis data did appear to give some specific and important insights into the quality of research of these middle performers, however, further analysis and research...

  5. Port performance evaluation tool based on microsimulation model

    Directory of Open Access Journals (Sweden)

    Tsavalista Burhani Jzolanda

    2017-01-01

    Full Text Available As port performance is becoming correlative to national competitiveness, the issue of port performance evaluation has significantly raised. Port performances can simply be indicated by port service levels to the ship (e.g., throughput, waiting for berthing etc., as well as the utilization level of equipment and facilities within a certain period. The performances evaluation then can be used as a tool to develop related policies for improving the port’s performance to be more effective and efficient. However, the evaluation is frequently conducted based on deterministic approach, which hardly captures the nature variations of port parameters. Therefore, this paper presents a stochastic microsimulation model for investigating the impacts of port parameter variations to the port performances. The variations are derived from actual data in order to provide more realistic results. The model is further developed using MATLAB and Simulink based on the queuing theory.

  6. Key performance indicators and companies logistic strategy evaluation

    Directory of Open Access Journals (Sweden)

    Galyna Tarasiuk

    2013-11-01

    Full Text Available 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, quality-oriented, time-oriented, productivity-oriented and return on investment in logistics oriented, was developed key performance indicators system of in company’s logistic cost-oriented strategy evaluation (proposed four indicators blocks: financial, customer, internal, study and growth components of logistic strategy.

  7. Financial performance evaluation and bankruptcy prediction (failure1

    Directory of Open Access Journals (Sweden)

    Talal A. Al-Kassar, Dr.

    2014-10-01

    The research also demonstrates the need to include measures of both financial and non-financial performance in the evaluation as they complement each other. Without both financial and non-financial, the evaluation process is incomplete and does not provide desired results or the correct image of the process. The research suggests including comprehensive measures of performance evaluation of projects by using indicators of adopted criteria. Thus, the application of both models leads to better results and assists users in maintaining greater objectivity while obtaining more accurate results than from analysis based on personal evaluation alone.

  8. 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.

  9. Analytical Framework for Performance Evaluation of Research Organizations

    Directory of Open Access Journals (Sweden)

    Nagesh R. Iyer

    2014-07-01

    Full Text Available Performance evaluation is an important measure of the total quality management, which can be used to assess the performance of an individual or an organization with respect to set goals and targets. The metrics/parameters used for evaluating the performance and the way in which these are measured by using appropriate tools and techniques play a major role in the evaluation process. Performance evaluation is even more challenging in the case of R and D organizations, where the outcome/output may not be tangible/measurable and varies from one organization to another, depending on the nature, vision, charter and character. A methodology is proposed to arrive at a framework that can help in objectively assessing or evaluating the performance of each of the laboratories of CSIR (Council of Scientific and Industrial Research based on four knowledge portfolios which are appropriately given weightages according to the impact they have on the four goods viz-Public, Private, Social and Strategic Appropriate parameters have been identified which can help in objectively evaluating the performance of the laboratory. The proposed analytical framework will facilitate quantification of performance of an R and D organization to enable resource allocation in a rational manner.

  10. Optimal contracts based on subjective performance evaluations and reciprocity

    DEFF Research Database (Denmark)

    Sebald, Alexander Christopher; Walzl, Markus

    2015-01-01

    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....... We propose a principal-agent model formalizing that agents might engage into conflict in response to ego-threatening performance appraisals and show that these conflicts stabilize principal-agent relationships based on subjective performance evaluations. In particular, we identify conditions...

  11. 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.

  12. Performance and Security Evaluation of Biometric-Based Web ...

    African Journals Online (AJOL)

    West African Journal of Industrial and Academic Research ... This paper evaluates the performance and security of biometric based web application, ... Monitoring System was developed using java technology and MYSQL as the backend.

  13. DEVELOPMENT OF A MARKET BENCHMARK PRICE FOR AGMAS PERFORMANCE EVALUATIONS

    OpenAIRE

    Good, Darrel L.; Irwin, Scott H.; Jackson, Thomas E.

    1998-01-01

    The purpose of this research report is to identify the appropriate market benchmark price to use to evaluate the pricing performance of market advisory services that are included in the annual AgMAS pricing performance evaluations. Five desirable properties of market benchmark prices are identified. Three potential specifications of the market benchmark price are considered: the average price received by Illinois farmers, the harvest cash price, and the average cash price over a two-year crop...

  14. Evaluating supplier quality performance using fuzzy analytical hierarchy process

    Science.gov (United States)

    Ahmad, Nazihah; Kasim, Maznah Mat; Rajoo, Shanmugam Sundram Kalimuthu

    2014-12-01

    Evaluating supplier quality performance is vital in ensuring continuous supply chain improvement, reducing the operational costs and risks towards meeting customer's expectation. This paper aims to illustrate an application of Fuzzy Analytical Hierarchy Process to prioritize the evaluation criteria in a context of automotive manufacturing in Malaysia. Five main criteria were identified which were quality, cost, delivery, customer serviceand technology support. These criteria had been arranged into hierarchical structure and evaluated by an expert. The relative importance of each criteria was determined by using linguistic variables which were represented as triangular fuzzy numbers. The Center of Gravity defuzzification method was used to convert the fuzzy evaluations into their corresponding crisps values. Such fuzzy evaluation can be used as a systematic tool to overcome the uncertainty evaluation of suppliers' performance which usually associated with human being subjective judgments.

  15. Feedback-giving behaviour in performance evaluations during clinical clerkships

    NARCIS (Netherlands)

    Bok, Harold G. J.; Jaarsma, Debbie A. D. C.; Spruijt, Annemarie; Van Beukelen, Peter; Van der Vleuten, Cees P. M.; Teunissen, Pim W.

    2016-01-01

    CONTEXT: Narrative feedback documented in performance evaluations by the teacher, i.e. the clinical supervisor, is generally accepted to be essential for workplace learning. Many studies have examined factors of influence on the usage of mini-clinical evaluation exercise (mini-CEX) instruments and

  16. Legal Issues in Faculty Evaluation of Student Clinical Performance.

    Science.gov (United States)

    Kapp, Marshall B.

    1981-01-01

    Many faculty members are reluctant to evaluate the clinical performance of medical students because of fear of legal liability and lawsuits. Current methods and uses of evaluation and legal issues are discussed. The Supreme Court's decision in Board of Curators of the University of Missouri v. Horowitz is discussed. (Author/MLW)

  17. Comparative evaluation of maintenance performance using subsurvival functions

    DEFF Research Database (Denmark)

    Paulsen, J.L.; Cooke, R.; Nyman, R.

    1997-01-01

    Subsurvival functions are applied to operational data for the control rod drive systems of Nordic nuclear reactors to evaluate maintenance performance. Competing failure modes are preventive and corrective maintenance. Maintenance indicators are defined and evaluated for 8 plants. (C) 1997 Elsevier...

  18. Performance evaluation of six homocysteine cycle enzymatic detection systems

    Institute of Scientific and Technical Information of China (English)

    安崇文

    2014-01-01

    Objective To evaluate the performance of six homocysteine(Hcy)analysis systems.Methods This is a methodological evaluation study.We analyzed six cycle enzymatic systems,and their correlation and deviation compared with chemiluminescence microparticle immunoassay(CMIA)from Abbott Architect plus i2000 system,Precision,accuracy,anti-interference and analytical

  19. Reliability and Validity of the Professional Counseling Performance Evaluation

    Science.gov (United States)

    Shepherd, J. Brad; Britton, Paula J.; Kress, Victoria E.

    2008-01-01

    The definition and measurement of counsellor trainee competency is an issue that has received increased attention yet lacks quantitative study. This research evaluates item responses, scale reliability and intercorrelations, interrater agreement, and criterion-related validity of the Professional Performance Fitness Evaluation/Professional…

  20. Evaluating Organizational Performance: Rational, Natural, and Open System Models

    Science.gov (United States)

    Martz, Wes

    2013-01-01

    As the definition of organization has evolved, so have the approaches used to evaluate organizational performance. During the past 60 years, organizational theorists and management scholars have developed a comprehensive line of thinking with respect to organizational assessment that serves to inform and be informed by the evaluation discipline.…

  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. Feedback-giving behaviour in performance evaluations during clinical clerkships

    NARCIS (Netherlands)

    Bok, Harold G J; Jaarsma, Debbie A D C; Spruijt, Annemarie; Van Beukelen, Peter; Van Der Vleuten, Cees P M; Teunissen, Pim W

    2016-01-01

    CONTEXT: Narrative feedback documented in performance evaluations by the teacher, i.e. the clinical supervisor, is generally accepted to be essential for workplace learning. Many studies have examined factors of influence on the usage of mini-clinical evaluation exercise (mini-CEX) instruments and p

  3. Citation ranking versus peer evaluation of senior faculty research performance

    DEFF Research Database (Denmark)

    Meho, Lokman I.; Sonnenwald, Diane H.

    2000-01-01

    The purpose of this study is to analyze the relationship between citation ranking and peer evaluation in assessing senior faculty research performance. Other studies typically derive their peer evaluation data directly from referees, often in the form of ranking. This study uses two additional...

  4. Feedback-giving behaviour in performance evaluations during clinical clerkships

    NARCIS (Netherlands)

    Bok, Harold G J; Jaarsma, Debbie A D C; Spruijt, Annemarie; Van Beukelen, Peter; Van Der Vleuten, Cees P M; Teunissen, Pim W

    2015-01-01

    CONTEXT: Narrative feedback documented in performance evaluations by the teacher, i.e. the clinical supervisor, is generally accepted to be essential for workplace learning. Many studies have examined factors of influence on the usage of mini-clinical evaluation exercise (mini-CEX) instruments and p

  5. 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.

  6. Chinese Middle School Teachers' Preferences Regarding Performance Evaluation Measures

    Science.gov (United States)

    Liu, Shujie; Xu, Xianxuan; Stronge, James H.

    2016-01-01

    Teacher performance evaluation currently is receiving unprecedented attention from policy makers, scholars, and practitioners worldwide. This study is one of the few studies of teacher perceptions regarding teacher performance measures that focus on China. We employed a quantitative dominant mixed research design to investigate Chinese teachers'…

  7. 48 CFR 3036.201 - Evaluation of contractor performance.

    Science.gov (United States)

    2010-10-01

    ...) 48 CFR 36.201. Access to reports is through the CPS or the government-wide system, Past Performance... 48 Federal Acquisition Regulations System 7 2010-10-01 2010-10-01 false Evaluation of contractor performance. 3036.201 Section 3036.201 Federal Acquisition Regulations System DEPARTMENT OF HOMELAND...

  8. Performance evaluation of communication systems via importance sampling

    NARCIS (Netherlands)

    Remondo Bueno, D.

    2000-01-01

    In the design and development of telecommunication systems, the preparation of experiments can be made more effective by predicting the system performance and its dependence on the different system parameters. This can be done by modeling the system and using performance evaluation methods. This dis

  9. Sources of Bias in Performance Evaluation: Two Experiments

    Science.gov (United States)

    Feldman, Jack M.; Hilterman, Robert J.

    1977-01-01

    Reports two experiments designed to determine if (1) low-performing blacks would be evaluated lower than comparable whites while high-performing blacks would be rated higher than white counterparts, and (2) perceived social class, not race, would be the relevant variable in the operation of the stereotype confirmation - contrast process. Available…

  10. Performance evaluation of communication systems via importance sampling

    NARCIS (Netherlands)

    Remondo Bueno, D.

    2000-01-01

    In the design and development of telecommunication systems, the preparation of experiments can be made more effective by predicting the system performance and its dependence on the different system parameters. This can be done by modeling the system and using performance evaluation methods. This

  11. China Accomplishes International Evaluation on Science Funding and Management Performance

    Institute of Scientific and Technical Information of China (English)

    2011-01-01

    On the occasion of the 25th anniversary of National Natural Science Foundation of China(NSFC ), the International Evaluation on Science Funding and Management Performance,which is so far the largest comprehensive performance assessment on science funding and management of science and technology,is completed successfully.

  12. Evaluating the Performance of an Integrated Navigation System.

    NARCIS (Netherlands)

    Lorga, J.F.M.; Chu, Q.P.; Mulder, J.A.; Halsema, D. van

    2005-01-01

    In this paper, the authors propose to introduce and describe a newly developed precise tightly-coupled integrated navigation system. The performed experiments with the purpose of evaluating the system performance are shown. A complete description of the integrated navigation system hardware, includi

  13. Performance evaluation on aquatic product cold-chain logistics

    Directory of Open Access Journals (Sweden)

    Wenbing Wu

    2015-11-01

    Full Text Available Purpose: The requirements for high quality and diversification aquatic products are increasing with the improvement of Chinese living standard. However, the distribution between place of production and place of consumption are uneven, which results in large cold-chain logistics demand for aquatic products. At present, the low-level development of cold chain logistics has a bad impact on the circulation of aquatic products in China. So it is very urgent to develop cold-chain logistics in China. Design/methodology/approach: In order to do this, we apply performance evaluation, a well-known management tool, to study Chinese aquatic product cold-chain logistics. In this paper we first propose SISP(Subjects, Indexes, Standards, and Phases of performance evaluation model and ACSSN model(Aquatic product, Customer, Supply Chain, Society, and Node enterprises of supply chain for aquatic products cold-chain logistics performance evaluation. Then an ANP-Fuzzy method is proposed to evaluate the operational performance of Shandong Oriental Ocean Sci-Tech Co., Ltd. Furthermore, a system dynamic model is built to simulate the impact of temperature on the profits in aquatic products cold-chain sales section. Findings: We find out within a reasonable temperature range, lower temperature brings higher profit level. Also, performance improvement methods are proposed and the simulation of performance evaluation system is developed. Practical implications: Our findings can help to improve the level of aquatic product cold-chain logistics in China. Originality/value: The paper proposes the SISP (Subjects, Indexes, Standards, and Phases of performance evaluation model and ACSSN model (Aquatic product, Customer, Supply Chain, Society, and Node enterprises of supply chain for aquatic products cold-chain logistics performance evaluation.

  14. Evaluation of the dynamic and kinematic performance of the THOR dummy: neck performance

    NARCIS (Netherlands)

    Hoofman, M.; Ratingen, M.R. van; Wismans, J.S.H.M.

    1998-01-01

    The objective of this study is to evaluate the frontal head-neck performance of the THOR neck with respect to the human frontal head-neck performance and the Hybrid-III frontal head-neck performance. For this purpose, tests were carried out with an isolated THOR and Hybrid-III-neck system on a HyGe

  15. Evaluation of the dynamic and kinematic performance of the THOR dummy: neck performance

    NARCIS (Netherlands)

    Hoofman, M.; Ratingen, M.R. van; Wismans, J.S.H.M.

    1998-01-01

    The objective of this study is to evaluate the frontal head-neck performance of the THOR neck with respect to the human frontal head-neck performance and the Hybrid-III frontal head-neck performance. For this purpose, tests were carried out with an isolated THOR and Hybrid-III-neck system on a HyGe

  16. 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.

  17. 78 FR 48123 - Federal Acquisition Regulation; Contractor Comment Period, Past Performance Evaluations

    Science.gov (United States)

    2013-08-07

    ... Federal Acquisition Regulation; Contractor Comment Period, Past Performance Evaluations AGENCY: Department... comments on past performance evaluations and making past performance evaluations available to source... Decisions'', require revisions to the acquisition regulations on past performance evaluations so...

  18. Performance evaluation of a texture-based segmentation algorithm

    Science.gov (United States)

    Sadjadi, Firooz A.

    1991-07-01

    Texture segmentations are crucial components of many remote sensing, scene analysis, and object recognition systems. However, very little attention has been paid to the problem of performance evaluation in the numerous algorithms that have been proposed by the image understanding community. In this paper, a particular algorithm is introduced and its performance is evaluated in a systematic manner on a wide range of scene and scenarios. Both the algorithm and the methodology used in its evaluation have significance in numerous applications in the computer-based image understanding field.

  19. The Impact of Self-Evaluation Instruction on Student Self-Evaluation, Music Performance, and Self-Evaluation Accuracy

    Science.gov (United States)

    Hewitt, Michael P.

    2011-01-01

    The author sought to determine whether self-evaluation instruction had an impact on student self-evaluation, music performance, and self-evaluation accuracy of music performance among middle school instrumentalists. Participants (N = 211) were students at a private middle school located in a metropolitan area of a mid-Atlantic state. Students in…

  20. EVALUATING THE PERFORMANCE OF LIBYAN BANKS USING RETURN ON INVESTMENT

    Directory of Open Access Journals (Sweden)

    Khalad M.S. Alrafadi

    2013-01-01

    Full Text Available Return on Investment (ROI is a financial ratio which commonly used to evaluate the overall performance of a company. Despite of the importance of ROI unfortunately not many Libyan banks use it to evaluate their performance. Most of Libyan banks use the result of income statements to evaluate their performance instead of other tools that use to evaluate performance of banks. This study will be focusing on the ROI. The objective of this research is to evaluate the performance of Libyan banks using ROI as a financial tool. The Libyan banks which involved in this research are: Alwahda bank, National Commercial bank, Commercial and Development bank, Mediterranean bank and Alejmaa Alarabi bank. In this research financial statements of the Libyan banks for period from 2005-2009 will be used to calculate the ROI. In general, the results of the ROI of the banks used in this research showed increase and then begin to decrease and then increase again. The results clearly indicate that the performance of Libyan banks is not stable depending on components of ROI.

  1. An Alternative Perspective on the Interfirm Labor Division and Product Development Capabilities under Vertical Disintegration : The Case of the Dissemination of System Knowledge in the Global Mobile Phone Handset Industries

    OpenAIRE

    Masanori, Yasumoto; Shiu, Jing-Ming

    2009-01-01

    The study proposes an alternative perspective to elucidate interfirm labor division under vertical disintegration in order to explore product development capabilities in open environments, drawing on the case of the global mobile handset industries. Product modularization with the birth of supply chain of standardized components/technologies is regarded as the major force to enhance vertical disintegration. Nevertheless, a product developer, particularly a firm without sufficient experiences ...

  2. 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.

  3. 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.

  4. 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.

  5. An Advanced Process of Condensation Performance Evaluation by BIM Application

    Directory of Open Access Journals (Sweden)

    Jooyung Hong

    2017-01-01

    Full Text Available There is increasing interest in sustainable design for saving energy and improving living conditions. In particular, condensation performance evaluation is a major part of the design phase in which condensation defects in apartment housing are considered. The aim of this work is to propose an advanced process for improving the efficiency and accuracy of evaluations of condensation performance. For this aim, an analysis of the traditional process was performed. The results support a proposed advanced evaluation process, which was then applied to develop a building information modeling (BIM application. The proposed process can be an alternative to the current evaluation process through the use of a BIM application for the automatic process. A case study showed that the advanced process of condensation performance evaluation could save 75.8% of the time compared with the current process. Additionally, from interviews with professionals, it is expected that the proposed process offers a practical means of increasing the efficiency and accuracy of the whole evaluation process.

  6. Performance Evaluation Tools for Message-Passing Parallel Problems

    Directory of Open Access Journals (Sweden)

    Wlodzimierz Funika

    1999-01-01

    Full Text Available The article presents a number of issues of designing and implementing performance evolution tools for message-passing parallel programs, eg. MPI and PVM. There is at number ofspecial techniques for investigating parallel programs, whose implementations are tools presented, A concept of performance observability is introduced. Although a number of interesting solutions of performance tools was developed in the course of last decade, there is a great demand for portable and integrated tools. Understanding the reason for this situation requires evaluating the state of art of existing tools, their advantages and drawbacks. Due to a complicated mechanism of interactions between a tool and operating system, computer architecture and application, evaluating the tool includes taking into account a large number of features. There is introduced a set of criteria, which enable a thorough evaluation of tools. based on the work of HPC standardizing organizations as well as the author's work. The second part of the article presents the review of features of the particular tools developed over last decade. The tools are being evaluated on the base of the criteria introduced. The features of the PARNAS performance tool project and its implementation are presented. The summary presents further avenues of inquiry in parallel performance evaluation tools.

  7. 中国大陆手机灰色市场研究%Research for the gray--market for handset in China

    Institute of Scientific and Technical Information of China (English)

    卢微微; 姚硕珉

    2011-01-01

    Cell phones are the most important daily personal communication tools. Gray market products to consumers as an important channel for mobile phones, mobile phone gray market is a topic receiving much attention. Gray market for handset even a representative study subject. This paper gray market for hand- set in mainland China, for example, of the China's gray market for handset situation, the existence of the gray market phone, and the reasons for the formation of channels, and discuss its implications and consequences of inhibition of the gray market. The results show that the gray market, the pros and cons can not be generalized. Use of government measures to suppress the cell phone eliminate the gray market imports would result in weakening the country's total welfare, it is suggested the decision to market self--regula- tion means the existence of the gray market phone.%手机是日常生活中最重要的个人通讯工具之一。灰色市场是向消费者提供手机产品的一个重要渠道,灰市手机也是受到较多关注的一个话题,手机灰色市场是灰色市场乃至灰色经济领域具有代表性的研究对象。本文以中国大陆手机灰色市场为例,研究了中国大陆手机灰色市场的现状,分析了手机灰色市场存在的原因以及形成渠道,探讨了其造成的影响以及抑制灰色市场的后果。研究结果表明,灰色市场的利弊不能一概而论。运用政府手段对手机灰色市场进行抑制消灭将对进口国总福利水平造成削弱,因此建议以市场自我调节手段决定手机灰色市场的存在与否。

  8. 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.

  9. Evaluating supplier quality performance using analytical hierarchy process

    Science.gov (United States)

    Kalimuthu Rajoo, Shanmugam Sundram; Kasim, Maznah Mat; Ahmad, Nazihah

    2013-09-01

    This paper elaborates the importance of evaluating supplier quality performance to an organization. Supplier quality performance evaluation reflects the actual performance of the supplier exhibited at customer's end. It is critical in enabling the organization to determine the area of improvement and thereafter works with supplier to close the gaps. Success of the customer partly depends on supplier's quality performance. Key criteria as quality, cost, delivery, technology support and customer service are categorized as main factors in contributing to supplier's quality performance. 18 suppliers' who were manufacturing automotive application parts evaluated in year 2010 using weight point system. There were few suppliers with common rating which led to common ranking observed by few suppliers'. Analytical Hierarchy Process (AHP), a user friendly decision making tool for complex and multi criteria problems was used to evaluate the supplier's quality performance challenging the weight point system that was used for 18 suppliers'. The consistency ratio was checked for criteria and sub-criteria. Final results of AHP obtained with no overlap ratings, therefore yielded a better decision making methodology as compared to weight point rating system.

  10. Effectiveness of a fading emulator in evaluating the performance of MIMO systems by comparison with a propagation test

    DEFF Research Database (Denmark)

    Yamamoto, Atsushi; Sakata, T.; Hayashi, T.

    2010-01-01

    the emulator to measure the 2-by-2 MIMO characteristics of four handset arrays with two monopoles in a multipath environment with one spatial cluster of incoming waves. From our investigation, good agreement was obtained between the results from the emulator and data measured in a radio propagation test...

  11. Statistical evaluation of diagnostic performance topics in ROC analysis

    CERN Document Server

    Zou, Kelly H; Bandos, Andriy I; Ohno-Machado, Lucila; Rockette, Howard E

    2016-01-01

    Statistical evaluation of diagnostic performance in general and Receiver Operating Characteristic (ROC) analysis in particular are important for assessing the performance of medical tests and statistical classifiers, as well as for evaluating predictive models or algorithms. This book presents innovative approaches in ROC analysis, which are relevant to a wide variety of applications, including medical imaging, cancer research, epidemiology, and bioinformatics. Statistical Evaluation of Diagnostic Performance: Topics in ROC Analysis covers areas including monotone-transformation techniques in parametric ROC analysis, ROC methods for combined and pooled biomarkers, Bayesian hierarchical transformation models, sequential designs and inferences in the ROC setting, predictive modeling, multireader ROC analysis, and free-response ROC (FROC) methodology. The book is suitable for graduate-level students and researchers in statistics, biostatistics, epidemiology, public health, biomedical engineering, radiology, medi...

  12. NREL Evaluates Performance of Fast-Charge Electric Buses

    Energy Technology Data Exchange (ETDEWEB)

    2016-09-16

    This real-world performance evaluation is designed to enhance understanding of the overall usage and effectiveness of electric buses in transit operation and to provide unbiased technical information to other agencies interested in adding such vehicles to their fleets. Initial results indicate that the electric buses under study offer significant fuel and emissions savings. The final results will help Foothill Transit optimize the energy-saving potential of its transit fleet. NREL's performance evaluations help vehicle manufacturers fine-tune their designs and help fleet managers select fuel-efficient, low-emission vehicles that meet their bottom line and operational goals. help Foothill Transit optimize the energy-saving potential of its transit fleet. NREL's performance evaluations help vehicle manufacturers fine-tune their designs and help fleet managers select fuel-efficient, low-emission vehicles that meet their bottom line and operational goals.

  13. Tools for evaluating team performance in simulation-based training.

    Science.gov (United States)

    Rosen, Michael A; Weaver, Sallie J; Lazzara, Elizabeth H; Salas, Eduardo; Wu, Teresa; Silvestri, Salvatore; Schiebel, Nicola; Almeida, Sandra; King, Heidi B

    2010-10-01

    Teamwork training constitutes one of the core approaches for moving healthcare systems toward increased levels of quality and safety, and simulation provides a powerful method of delivering this training, especially for face-paced and dynamic specialty areas such as Emergency Medicine. Team performance measurement and evaluation plays an integral role in ensuring that simulation-based training for teams (SBTT) is systematic and effective. However, this component of SBTT systems is overlooked frequently. This article addresses this gap by providing a review and practical introduction to the process of developing and implementing evaluation systems in SBTT. First, an overview of team performance evaluation is provided. Second, best practices for measuring team performance in simulation are reviewed. Third, some of the prominent measurement tools in the literature are summarized and discussed relative to the best practices. Subsequently, implications of the review are discussed for the practice of training teamwork in Emergency Medicine.

  14. Tools for evaluating team performance in simulation-based training

    Science.gov (United States)

    Rosen, Michael A; Weaver, Sallie J; Lazzara, Elizabeth H; Salas, Eduardo; Wu, Teresa; Silvestri, Salvatore; Schiebel, Nicola; Almeida, Sandra; King, Heidi B

    2010-01-01

    Teamwork training constitutes one of the core approaches for moving healthcare systems toward increased levels of quality and safety, and simulation provides a powerful method of delivering this training, especially for face-paced and dynamic specialty areas such as Emergency Medicine. Team performance measurement and evaluation plays an integral role in ensuring that simulation-based training for teams (SBTT) is systematic and effective. However, this component of SBTT systems is overlooked frequently. This article addresses this gap by providing a review and practical introduction to the process of developing and implementing evaluation systems in SBTT. First, an overview of team performance evaluation is provided. Second, best practices for measuring team performance in simulation are reviewed. Third, some of the prominent measurement tools in the literature are summarized and discussed relative to the best practices. Subsequently, implications of the review are discussed for the practice of training teamwork in Emergency Medicine. PMID:21063558

  15. Features principles and purposes of teacher performance evaluation.

    Directory of Open Access Journals (Sweden)

    Esnares José Maussa Díaz

    2015-03-01

    Full Text Available Teacher evaluation represents a nodal aspect for improving of system education. Any evaluation has a previously predefined purpose and is essentially a valorative act, where the principles applied are indicators of the degree of responsibility which is performed and the visión that society gives to the education. This paper analyzes how the purposes are fulfilled, principles and characteristics of the performance evaluation of teachers in connection with the practice of respect for the guiding principles of assessment practice teaching; just like existing rating on indicators of professional and personal development achieved by teachers as a result of the evaluative practices in the context of the pursuit of improving of quality of education. 

  16. A formative evaluation of a pay-for-performance system

    Directory of Open Access Journals (Sweden)

    Lindsey Joseph

    2012-07-01

    Full Text Available Orientation: Pay-for-performance (PFP systems emerged during the 1980s as performance improvement tools. However, research findings have shown contradictory evidence as to whether these systems motivate employees to improve their performance. Research purpose: The main aim of this evaluation was to assess whether a PFP system, which a South African university introduced for administrative employees, improved their performance. A secondary aim was to examine whether the university implemented the system as it intended to.Motivation for the evaluation: The motivation for this evaluation was to add to the social science literature on the effectiveness of PFP systems. There are many contradictions in the literature and further exploration of whether these systems deliver their intended outcomes seemed overdue.Research design, approach and method: The evaluators used a descriptive design. They administered a customised questionnaire, to which 391 university staff members responded. Of these, 129 were line managers and 262 were administrative staff.Main findings: The administrative staff, whose working lives the PFP system affected, thought that it did not improve their performance. Both line managers and administrative staff indicated that the pay aspect of the system did not differentiate between poor and excellent performance.Practical/managerial implications: The evaluators made practical recommendations for improving the implementation of the system.Contribution/value-add: This evaluation contributed to the social science literature on the effectiveness of PFP systems by showing that poor implementation rather than poor design often lies at the root of a system that does not deliver its intended outcomes.

  17. Achieving "Fairness" in Data Fusion Performance Evaluation Development

    Science.gov (United States)

    2006-04-30

    Performance Evaluation Development 5b. GRANT NUMBER F49620-03-1-0037 5c. PROGRAM ELEMENT NUMBER 6. AUTHOR(S) 5d. PROJECT NUMBER Dr. James Llinas 5e...Evaluation Methods for Network Centric Data-Fusion Capable Tactical Platforms Kedar Sambhoos, Satyaki Ghosh Dastidar, James Llinas Christopher Bowman...were based settings were as follows: 8. ensor ID: Sensor matix wer based 1. Targets: 6 targets upon entity class confusion matrix per sensor mode. 2

  18. Performance Evaluation of Modified AODV for Load Balancing

    Directory of Open Access Journals (Sweden)

    Amita Rani

    2007-01-01

    Full Text Available AODV is a prominent routing protocol for MANET that uses hop count as a path selection metric. However, AODV has no means to convey traffic load on current route. This study focuses on introducing a new metric, Aggregate Interface Queue Length (AIQL, in AODV in order to deal with load balancing issues. Performance evaluation through simulation shows that the modified code can perform better than the conventional AODV. We also evaluate the effect of interface queue length on normalized routing load, average throughput and average end-to-end delay.

  19. 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),

  20. 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.

  1. Idaho National Engineering Laboratory analytical services performance evaluation plan

    Energy Technology Data Exchange (ETDEWEB)

    Connolly, J.M.; Sailer, S.J.; Anderson, D.A.

    1994-03-01

    The Idaho National Engineering Laboratory`s (INEL`s) Sample Management Office (SMO) conducts a Performance Evaluation Program that ensures that data of known quality are supplied by the analytical. chemistry service organizations with which the INEL contracts. The Analytical Services Performance Evaluation Plan documents the routine monitoring and assessment of suppliers conducted by the SMO, and it describes the procedures that are followed to ensure that suppliers meet all appropriate requirements. Because high-quality analytical support is vital to the success of DOE Environmental Management programs at the INEL, the performance of organizations providing these services must be routinely monitored and assessed. Analytical disciplines for which performance is monitored include metals, organics, radiochemical, and miscellaneous classical analysis methods.

  2. Lithographic performance evaluation of a contaminated EUV mask after cleaning

    Energy Technology Data Exchange (ETDEWEB)

    George, Simi; Naulleau, Patrick; Okoroanyanwu, Uzodinma; Dittmar, Kornelia; Holfeld, Christian; Wuest, Andrea

    2009-11-16

    The effect of surface contamination and subsequent mask surface cleaning on the lithographic performance of a EUV mask is investigated. SEMATECH's Berkeley micro-field exposure tool (MET) printed 40 nm and 50 nm line and space (L/S) patterns are evaluated to compare the performance of a contaminated and cleaned mask to an uncontaminated mask. Since the two EUV masks have distinct absorber architectures, optical imaging models and aerial image calculations were completed to determine any expected differences in performance. Measured and calculated Bossung curves, process windows, and exposure latitudes for the two sets of L/S patterns are compared to determine how the contamination and cleaning impacts the lithographic performance of EUV masks. The observed differences in mask performance are shown to be insignificant, indicating that the cleaning process did not appreciably affect mask performance.

  3. PERFORMANCE EVALUATION OF THE DATA MINING CLASSIFICATION METHODS

    Directory of Open Access Journals (Sweden)

    CRISTINA OPREA

    2014-05-01

    Full Text Available The paper aims to analyze how the performance evaluation of different classification models from data mining process. Classification is the most widely used data mining technique of supervised learning. This is the process of identifying a set of features and templates that describe the data classes or concepts. We applied various classification algorithms on different data sets to streamline and improve the algorithm performance.

  4. Evaluating the financial performance of Companies from the Pharmaceutical Industry

    Directory of Open Access Journals (Sweden)

    BABA Mirela Camelia

    2017-01-01

    Full Text Available The pharmaceutical industry has become a highly competitive environment, which is why performance represents the key element to stay on a market. Evaluating the performance of the economic entities from this sector is of high importance for the management, shareholders, trading partners and creditors. This study focuses on investigating and analyzing the financial statements for 12 drug producing companies in Romania. The analysis is based on data corresponding to the period 2008-2015.

  5. Performance Evaluation of the WSN Routing Protocols Scalability

    OpenAIRE

    2008-01-01

    Scalability is an important factor in designing an efficient routing protocol for wireless sensor networks (WSNs). A good routing protocol has to be scalable and adaptive to the changes in the network topology. Thus scalable protocol should perform well as the network grows larger or as the workload increases. In this paper, routing protocols for wireless sensor networks are simulated and their performances are evaluated to determine their capability for supporting network ...

  6. Performance Evaluation of the WSN Routing Protocols Scalability

    Directory of Open Access Journals (Sweden)

    L. Alazzawi

    2008-01-01

    Full Text Available Scalability is an important factor in designing an efficient routing protocol for wireless sensor networks (WSNs. A good routing protocol has to be scalable and adaptive to the changes in the network topology. Thus scalable protocol should perform well as the network grows larger or as the workload increases. In this paper, routing protocols for wireless sensor networks are simulated and their performances are evaluated to determine their capability for supporting network scalability.

  7. High performance APCS conceptual design and evaluation scoping study

    Energy Technology Data Exchange (ETDEWEB)

    Soelberg, N.; Liekhus, K.; Chambers, A.; Anderson, G.

    1998-02-01

    This Air Pollution Control System (APCS) Conceptual Design and Evaluation study was conducted to evaluate a high-performance (APC) system for minimizing air emissions from mixed waste thermal treatment systems. Seven variations of high-performance APCS designs were conceptualized using several design objectives. One of the system designs was selected for detailed process simulation using ASPEN PLUS to determine material and energy balances and evaluate performance. Installed system capital costs were also estimated. Sensitivity studies were conducted to evaluate the incremental cost and benefit of added carbon adsorber beds for mercury control, specific catalytic reduction for NO{sub x} control, and offgas retention tanks for holding the offgas until sample analysis is conducted to verify that the offgas meets emission limits. Results show that the high-performance dry-wet APCS can easily meet all expected emission limits except for possibly mercury. The capability to achieve high levels of mercury control (potentially necessary for thermally treating some DOE mixed streams) could not be validated using current performance data for mercury control technologies. The engineering approach and ASPEN PLUS modeling tool developed and used in this study identified APC equipment and system performance, size, cost, and other issues that are not yet resolved. These issues need to be addressed in feasibility studies and conceptual designs for new facilities or for determining how to modify existing facilities to meet expected emission limits. The ASPEN PLUS process simulation with current and refined input assumptions and calculations can be used to provide system performance information for decision-making, identifying best options, estimating costs, reducing the potential for emission violations, providing information needed for waste flow analysis, incorporating new APCS technologies in existing designs, or performing facility design and permitting activities.

  8. The Search Performance Evaluation and Prediction in Exploratory Search

    OpenAIRE

    2016-01-01

    The exploratory search for complex search tasks requires an effective search behavior model to evaluate and predict user search performance. Few studies have investigated the relationship between user search behavior and search performance in exploratory search. This research adopts a mixed approach combining search system development, user search experiment, search query log analysis, and multivariate regression analysis to resolve the knowledge gap. Through this study, it is shown that expl...

  9. The Search Performance Evaluation and Prediction in Exploratory Search

    OpenAIRE

    Liu, Fei

    2016-01-01

    The exploratory search for complex search tasks requires an effective search behavior model to evaluate and predict user search performance. Few studies have investigated the relationship between user search behavior and search performance in exploratory search. This research adopts a mixed approach combining search system development, user search experiment, search query log analysis, and multivariate regression analysis to resolve the knowledge gap. Through this study, it is shown that expl...

  10. Competency-Based Performance Appraisals: Improving Performance Evaluations of School Nutrition Managers and Assistants/Technicians

    Science.gov (United States)

    Cross, Evelina W.; Asperin, Amelia Estepa; Nettles, Mary Frances

    2009-01-01

    Purpose: The purpose of the research was to develop a competency-based performance appraisal resource for evaluating school nutrition (SN) managers and assistants/technicians. Methods: A two-phased process was used to develop the competency-based performance appraisal resource for SN managers and assistants/technicians. In Phase I, draft…

  11. Experimental design methodology: the scientific tool for performance evaluation

    Science.gov (United States)

    Sadjadi, Firooz A.

    1990-09-01

    With the rapid growth of the signal and image processing technology in the last several decades has arisen the need for means of evaluating and comparing the numerous algorithms and systems that are created or are being developed. Performance evaluation, in the past, has been mostly ad hoc and incohesive. In this paper we present a systematic step by step approach for the scientific evaluation of signal and image processing algorithms and systems. This approach is based on the methodology of Experimental Design. We illustrate this method by means of an example from the field of automatic object recognition.

  12. Navistar eStar 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, Navistar will build and deploy all-electric medium-duty trucks. The trucks will be deployed in diverse climates across the country.

  13. Smith Newton Vehicle Performance Evaluation - Gen 2 - 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.

  14. Smith Newton Vehicle Performance Evaluation - 1st Quarter 2014 (Brochure)

    Energy Technology Data Exchange (ETDEWEB)

    2014-04-01

    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.

  15. Smith Newton Vehicle Performance Evaluation - Gen2 - 2013 (Brochure)

    Energy Technology Data Exchange (ETDEWEB)

    2014-04-01

    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.

  16. OpenCL Performance Evaluation on Modern Multicore CPUs

    Directory of Open Access Journals (Sweden)

    Joo Hwan Lee

    2015-01-01

    Full Text Available Utilizing heterogeneous platforms for computation has become a general trend, making the portability issue important. OpenCL (Open Computing Language serves this purpose by enabling portable execution on heterogeneous architectures. However, unpredictable performance variation on different platforms has become a burden for programmers who write OpenCL applications. This is especially true for conventional multicore CPUs, since the performance of general OpenCL applications on CPUs lags behind the performance of their counterparts written in the conventional parallel programming model for CPUs. In this paper, we evaluate the performance of OpenCL applications on out-of-order multicore CPUs from the architectural perspective. We evaluate OpenCL applications on various aspects, including API overhead, scheduling overhead, instruction-level parallelism, address space, data location, data locality, and vectorization, comparing OpenCL to conventional parallel programming models for CPUs. Our evaluation indicates unique performance characteristics of OpenCL applications and also provides insight into the optimization metrics for better performance on CPUs.

  17. The transport performance evaluation system building of logistics enterprises

    Directory of Open Access Journals (Sweden)

    Xueli Wang

    2013-09-01

    Full Text Available Purpose: modern logistics has a significant role in today’s society, logistics cost accounts for 35% to 50% of total logistics costs, so it’s great significance to improve the transport performance of logistics enterprises. Design/methodology/approach: the authors select the transportation performance evaluation index of logistics enterprise, with the aid of the fuzzy theory and analytic hierarchy process (AHP, adopt the combining method of quantitative and qualitative analysis, construct the transport performance evaluation system of logistics enterprises. Findings: the choice of transport performance evaluation indicator system for Logistics enterprise is in a state of "high", which indicates the indicator selection is reasonable. Research limitations/implications: the selected indicators with experts’ subjective factors can not accurately quantify. Practical implications: it has important practical significance to promote the development of modern logistics enterprises and save social cost. Originality/value: current research methods mainly include the PDCA cycle model, key performance indicators (KPI and benchmarking method, principal component analysis method, etc. The authors for the first time with the aid of fuzzy theory and analytic hierarchy process (AHP, adopt the combining method of quantitative and qualitative research on transport performance problems.

  18. Handset Design Based on Moving Targets Tracker Via GPS/GSM%基于GPS/GSM移动目标跟踪器的手持机设计

    Institute of Scientific and Technical Information of China (English)

    刘军涛; 郝文宁; 刘玉栋; 赵恩来

    2011-01-01

    伴随着新军事变革的日渐深入,部队信息化程度日益提高.本文针对部队演习和训练中存在着大量移动目标,指挥控制中心不便管理的现状,设计了一款基丁GSM网络的信息采集系统的手持机系统.经测试该系统能有效提高部队实体机动信息采集效率,对于促进部队相关训练具有一定的现实意义.%The informationization level becomes higher and higher with the revolution in military. In this paper, an information collected handset based on GSM is designed to response the situation that there are so many moving targets in the exercising that brings a lot of inconvenience. It is proved to be an effective system to strenghen the capability of collecting information about troop moving, and it has its realistic significance in promoting the relative exercises.

  19. General Video Game Evaluation Using Relative Algorithm Performance Profiles

    DEFF Research Database (Denmark)

    Nielsen, Thorbjørn; Barros, Gabriella; Togelius, Julian;

    2015-01-01

    In order to generate complete games through evolution we need generic and reliably evaluation functions for games. It has been suggested that game quality could be characterised through playing a game with different controllers and comparing their performance. This paper explores that idea through...... investigating the relative performance of different general game-playing algorithms. Seven game-playing algorithms was used to play several hand-designed, mutated and randomly generated VGDL game descriptions. Results discussed appear to support the conjecture that well-designed games have, in average, a higher...... performance difference between better and worse game-playing algorithms....

  20. Evaluation of GPFS Connectivity Over High-Performance Networks

    Energy Technology Data Exchange (ETDEWEB)

    Srinivasan, Jay; Canon, Shane; Andrews, Matthew

    2009-02-17

    We present the results of an evaluation of new features of the latest release of IBM's GPFS filesystem (v3.2). We investigate different ways of connecting to a high-performance GPFS filesystem from a remote cluster using Infiniband (IB) and 10 Gigabit Ethernet. We also examine the performance of the GPFS filesystem with both serial and parallel I/O. Finally, we also present our recommendations for effective ways of utilizing high-bandwidth networks for high-performance I/O to parallel file systems.

  1. 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

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

    Science.gov (United States)

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

    2014-01-01

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

  3. Subjective performance evaluations and reciprocity in principal-agent relations

    DEFF Research Database (Denmark)

    Sebald, Alexander Christopher; Walzl, Markus

    2014-01-01

    . In contrast to existing models of reciprocity, we find that agents tend to sanction whenever the feedback of principals is below their subjective self-evaluations even if agents' pay-offs are independent of it. In turn, principals provide more positive feedback (relative to their actual performance assessment...

  4. An Agency Theory Perspective on Student Performance Evaluation

    Science.gov (United States)

    Smith, Michael E.; Zsidisin, George A.; Adams, Laural L.

    2005-01-01

    The emphasis in recent research on the responsibility of college and university business instructors to prepare students for future employment underscores a need to refine the evaluation of student performance. In this article, an agency theory framework is used to understand the trade-offs that may be involved in the selection of various…

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

    Science.gov (United States)

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

    2014-01-01

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

  6. 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.

  7. Effects of Physical Attractiveness on Evaluation of Vocal Performance.

    Science.gov (United States)

    Wapnick, Joel; Darrow, Alice Ann; Kovacs, Jolan; Dalrymple, Lucinda

    1997-01-01

    Studies whether physical attractiveness of singers affects judges' ratings of their vocal performances. Reveals that physical attractiveness does impact evaluation, that male raters were more severe than female raters, and that the rating of undergraduate majors versus graduate students and professors combined were not differently affected by…

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

    Science.gov (United States)

    Wiechman, Jeffery P.

    2013-01-01

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

  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. An Empirical Evaluation of the Performance of Mobile Network Connections

    OpenAIRE

    Bylund, Markus

    2003-01-01

    We present the results of an empirical evaluation of the performance of some network connections available for mobile terminals. General Packet Radio Service (GPRS) is compared with Bluetooth and a USB wired connection from a Sony Ericsson P800 smart phone.

  11. The Development of Performance Evaluation for Green Schools in Taiwan

    Science.gov (United States)

    Wang, Shun-Mei

    2009-01-01

    The purpose of this research is to develop a performance evaluation instrument for green schools in Taiwan. The instrument is designed according to three sets of criteria: participation and partnership, reflection and learning, and ecological consideration. It also covers three operational dimensions: learning context, administration, and…

  12. Documenting Teacher Candidates' Professional Growth through Performance Evaluation

    Science.gov (United States)

    Brown, Elizabeth Levine; Suh, Jennifer; Parsons, Seth A.; Parker, Audra K.; Ramirez, Erin M.

    2015-01-01

    In the United States, colleges of education are responding to demands for increased accountability. The purpose of this article is to describe one teacher education program's implementation of a performance evaluation tool during final internship that measures teacher candidates' development across four domains: Planning and Preparation,…

  13. 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.

  14. On Combining Functional Verification and Performance Evaluation Using CADP

    NARCIS (Netherlands)

    Hermanns, H.; Eriksson, L.-H.; Lindsay, P.

    2002-01-01

    Considering functional correctness and performance evaluation in a common framework is desirable, both for scientific and economic reasons. In this paper, we describe how the CADP toolbox, originally designed for verifying the functional correctness of LOTOS specifications, can also be used for perf

  15. Performance and Scalability Evaluation of the Ceph Parallel File System

    Energy Technology Data Exchange (ETDEWEB)

    Wang, Feiyi [ORNL; Nelson, Mark [Inktank Storage, Inc.; Oral, H Sarp [ORNL; Settlemyer, Bradley W [ORNL; Atchley, Scott [ORNL; Caldwell, Blake A [ORNL; Hill, Jason J [ORNL

    2013-01-01

    Ceph is an open-source and emerging parallel distributed file and storage system technology. By design, Ceph assumes running on unreliable and commodity storage and network hardware and provides reliability and fault-tolerance through controlled object placement and data replication. We evaluated the Ceph technology for scientific high-performance computing (HPC) environments. This paper presents our evaluation methodology, experiments, results and observations from mostly parallel I/O performance and scalability perspectives. Our work made two unique contributions. First, our evaluation is performed under a realistic setup for a large-scale capability HPC environment using a commercial high-end storage system. Second, our path of investigation, tuning efforts, and findings made direct contributions to Ceph's development and improved code quality, scalability, and performance. These changes should also benefit both Ceph and HPC communities at large. Throughout the evaluation, we observed that Ceph still is an evolving technology under fast-paced development and showing great promises.

  16. Multicriterial ranking approach for evaluating bank branch performance

    NARCIS (Netherlands)

    Aleskerov, F; Ersel, H; Yolalan, R

    2004-01-01

    14 ranking methods based on multiple criteria are suggested for evaluating the performance of the bank branches. The methods are explained via an illustrative example, and some of them are applied to a real-life data for 23 retail bank branches in a large-scale private Turkish commercial bank.

  17. Performance Evaluation of Spectral Amplitude Codes for OCDMA PON

    DEFF Research Database (Denmark)

    Binti Othman, Maisara; Jensen, Jesper Bevensee; Zhang, Xu

    2011-01-01

    In this paper, we present a performance evaluation of three codes; enhanced double weight (EDW), random diagonal (RD) and zero cross correlation (ZCC) for 10 Gb/s x 4 user, 20 km standard SMF transmission link for OCDMA PON. These SAC codes have ideal in-phase cross-correlation properties to reduce...

  18. Administrators' Views on Teacher Evaluation: Examining Ontario's Teacher Performance Appraisal

    Science.gov (United States)

    Maharaj, Sachin

    2014-01-01

    This study examines the views of administrators (i.e., principals and vice-principals) in Ontario, Canada, with regard to the province's Teacher Performance Appraisal process. A total of 178 responses were collected from a survey that examined five areas: 1) preparation and training; 2) classroom observations; 3) preparing the formal evaluation;…

  19. Implementation and Performance Evaluation Using the Fuzzy Network Balanced Scorecard

    Science.gov (United States)

    Tseng, Ming-Lang

    2010-01-01

    The balanced scorecard (BSC) is a multi-criteria evaluation concept that highlights the importance of performance measurement. However, although there is an abundance of literature on the BSC framework, there is a scarcity of literature regarding how the framework with dependence and interactive relationships should be properly implemented in…

  20. Image processing system performance prediction and product quality evaluation

    Science.gov (United States)

    Stein, E. K.; Hammill, H. B. (Principal Investigator)

    1976-01-01

    The author has identified the following significant results. A new technique for image processing system performance prediction and product quality evaluation was developed. It was entirely objective, quantitative, and general, and should prove useful in system design and quality control. The technique and its application to determination of quality control procedures for the Earth Resources Technology Satellite NASA Data Processing Facility are described.

  1. General Video Game Evaluation Using Relative Algorithm Performance Profiles

    DEFF Research Database (Denmark)

    Nielsen, Thorbjørn; Barros, Gabriella; Togelius, Julian;

    2015-01-01

    In order to generate complete games through evolution we need generic and reliably evaluation functions for games. It has been suggested that game quality could be characterised through playing a game with different controllers and comparing their performance. This paper explores that idea throug...

  2. New performance evaluation models for character detection in images

    Science.gov (United States)

    Wang, YanWei; Ding, XiaoQing; Liu, ChangSong; Wang, Kongqiao

    2010-02-01

    Detection of characters regions is a meaningful research work for both highlighting region of interest and recognition for further information processing. A lot of researches have been performed on character localization and extraction and this leads to the great needs of performance evaluation scheme to inspect detection algorithms. In this paper, two probability models are established to accomplish evaluation tasks for different applications respectively. For highlighting region of interest, a Gaussian probability model, which simulates the property of a low-pass Gaussian filter of human vision system (HVS), was constructed to allocate different weights to different character parts. It reveals the greatest potential to describe the performance of detectors, especially, when the result detected is an incomplete character, where other methods cannot effectively work. For the recognition destination, we also introduced a weighted probability model to give an appropriate description for the contribution of detection results to final recognition results. The validity of performance evaluation models proposed in this paper are proved by experiments on web images and natural scene images. These models proposed in this paper may also be able to be applied in evaluating algorithms of locating other objects, like face detection and more wide experiments need to be done to examine the assumption.

  3. A new method to evaluate human-robot system performance

    Science.gov (United States)

    Rodriguez, G.; Weisbin, C. R.

    2003-01-01

    One of the key issues in space exploration is that of deciding what space tasks are best done with humans, with robots, or a suitable combination of each. In general, human and robot skills are complementary. Humans provide as yet unmatched capabilities to perceive, think, and act when faced with anomalies and unforeseen events, but there can be huge potential risks to human safety in getting these benefits. Robots provide complementary skills in being able to work in extremely risky environments, but their ability to perceive, think, and act by themselves is currently not error-free, although these capabilities are continually improving with the emergence of new technologies. Substantial past experience validates these generally qualitative notions. However, there is a need for more rigorously systematic evaluation of human and robot roles, in order to optimize the design and performance of human-robot system architectures using well-defined performance evaluation metrics. This article summarizes a new analytical method to conduct such quantitative evaluations. While the article focuses on evaluating human-robot systems, the method is generally applicable to a much broader class of systems whose performance needs to be evaluated.

  4. Analysis of Photovoltaic System Energy Performance Evaluation Method

    Energy Technology Data Exchange (ETDEWEB)

    Kurtz, S.; Newmiller, J.; Kimber, A.; Flottemesch, R.; Riley, E.; Dierauf, T.; McKee, J.; Krishnani, P.

    2013-11-01

    Documentation of the energy yield of a large photovoltaic (PV) system over a substantial period can be useful to measure a performance guarantee, as an assessment of the health of the system, for verification of a performance model to then be applied to a new system, or for a variety of other purposes. Although the measurement of this performance metric might appear to be straight forward, there are a number of subtleties associated with variations in weather and imperfect data collection that complicate the determination and data analysis. A performance assessment is most valuable when it is completed with a very low uncertainty and when the subtleties are systematically addressed, yet currently no standard exists to guide this process. This report summarizes a draft methodology for an Energy Performance Evaluation Method, the philosophy behind the draft method, and the lessons that were learned by implementing the method.

  5. 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

  6. Evaluation of Eco-Efficiency and Performance of Retrofit Materials

    Science.gov (United States)

    Gopinath, Smitha; Rama Chandra Murthy, A.; Iyer, Nagesh R.; Kokila, S.

    2015-12-01

    In this work three materials namely Fiber Reinforced Polymer (FRP), ferrocement and Textile Reinforced Concrete (TRC) have been evaluated towards their performance efficiency and eco-effectiveness for sustainable retrofitting applications. Investigations have been carried out for flexural strengthening of RC beams with FRP, ferrocement and TRC. It is observed that in the case of FRP, it is not possible to tailor the material according to design requirements and most of the time strengthened structure becomes over stiff. Eco-effectiveness of these retrofitting materials has been evaluated by computing the embodied energy. It is observed that the amount of CO2 emitted by TRC is less compared to other retrofit materials. Further, the performance point of retrofitted RC frames has been evaluated and damage index has been calculated to find out the effective retrofit material. It is concluded that, if RC frame is retrofitted with FRP and TRC, it undergoes less damage compared to ferrocement.

  7. Project Startup: Evaluating the Performance of Hydraulic Hybrid Refuse Vehicles

    Energy Technology Data Exchange (ETDEWEB)

    2015-09-01

    The Fleet Test and Evaluation Team at the National Renewable Energy Laboratory (NREL) is evaluating the in-service performance of 10 next-generation hydraulic hybrid refuse vehicles (HHVs), 8 previous-generation HHVs, and 8 comparable conventional diesel vehicles operated by Miami-Dade County's Public Works and Waste Management Department in southern Florida. The HHVs under study - Autocar E3 refuse trucks equipped with Parker Hannifin's RunWise Advanced Series Hybrid Drive systems - can recover as much as 70 percent of the energy typically lost during braking and reuse it to power the vehicle. NREL's evaluation will assess the performance of this technology in commercial operation and help Miami-Dade County determine the ideal routes for maximizing the fuel-saving potential of its HHVs.

  8. Software for evaluation of EPR-dosimetry performance.

    Science.gov (United States)

    Shishkina, E A; Timofeev, Yu S; Ivanov, D V

    2014-06-01

    Electron paramagnetic resonance (EPR) with tooth enamel is a method extensively used for retrospective external dosimetry. Different research groups apply different equipment, sample preparation procedures and spectrum processing algorithms for EPR dosimetry. A uniform algorithm for description and comparison of performances was designed and implemented in a new computer code. The aim of the paper is to introduce the new software 'EPR-dosimetry performance'. The computer code is a user-friendly tool for providing a full description of method-specific capabilities of EPR tooth dosimetry, from metrological characteristics to practical limitations in applications. The software designed for scientists and engineers has several applications, including support of method calibration by evaluation of calibration parameters, evaluation of critical value and detection limit for registration of radiation-induced signal amplitude, estimation of critical value and detection limit for dose evaluation, estimation of minimal detectable value for anthropogenic dose assessment and description of method uncertainty.

  9. Resilient Plant Monitoring System: Design, Analysis, and Performance Evaluation

    Energy Technology Data Exchange (ETDEWEB)

    Humberto E. Garcia; Wen-Chiao Lin; Semyon M. Meerkov; Maruthi T. Ravichandran

    2013-12-01

    Resilient monitoring systems are sensor networks that degrade gracefully under malicious attacks on their sensors, causing them to project misleading information. The goal of this paper is to design, analyze, and evaluate the performance of a resilient monitoring system intended to monitor plant conditions (normal or anomalous). The architecture developed consists of four layers: data quality assessment, process variable assessment, plant condition assessment, and sensor network adaptation. Each of these layers is analyzed by either analytical or numerical tools, and the performance of the overall system is evaluated using simulations. The measure of resiliency of the resulting system is evaluated using Kullback Leibler divergence, and is shown to be sufficiently high in all scenarios considered.

  10. 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.

  11. Performance Evaluation of Image Fusion Based on Discrete Cosine Transform

    Directory of Open Access Journals (Sweden)

    Ramkrishna Patil

    2013-05-01

    Full Text Available Discrete cosine transform (DCT is used for fusion of two different images and for image compression. Image fusion deals with creating an image by combining portions from other images to obtain an image in which all of the objects are in focus. Two multi focus images are used for image fusion. Different fusion algorithms are used and their performance is evaluated using evaluation metrics such as PSNR, SSIM, Spatial Frequency, Quality Index, Structural Content, Mean Absolute Error. Fusion performance is not good while using the algorithms with block size less than 64x64 and also the block size of 512x512. Contrast, amplitude and energy based image fusion algorithms performed well. The fused images are comparable with the reference image. Only the image size is considered but blurring percentage is not considered. These algorithms are very simple and might be suitable for real time applications

  12. Genetic evaluation of reproductive performance in Canadian dairy cattle

    Directory of Open Access Journals (Sweden)

    F. Miglior

    2010-04-01

    Full Text Available A new genetic evaluation system for the reproductive performance of dairy cattle has been developed in Canada. The evaluation system includes all traits related to reproductive performance, namely age at first service as a heifer trait, interval from calving to first service for cows and 7 traits each for both heifers and cows (56-days non return rate, interval from first service to conception, number of services to conception, gestation length, direct and maternal calving ease, direct and maternal calf survival and direct and maternal calf size. The model of analysis is a 16-trait animal model with different fixed effects according to the analyzed trait. Two indices for daughter fertility and calving performance have been developed. The impact of including the two indices in the national selection index was assessed.

  13. 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.

  14. Performance evaluation of electrorheological fluid using acoustic method

    Science.gov (United States)

    Wang, Xiaoyu; Gong, Xun; Qin, Chuanxi; Zhang, De; Zhang, Dong; Wu, Haodong

    2016-12-01

    This paper presents a simple method to evaluate the performance of electrorheological fluid (ERF) with acoustic parameters. The key parameters, such as the storage modulus and the loss modulus are obtained by ultrasonic shear wave reflectometry. By comparing and analyzing the value of the ratio of these two shear wave parameters, it could be easily and quickly to evaluate the performance of ERF. Four kinds of electrode surface morphology are chosen to vary the performance of ERF in this paper. The experimental results show that the optimum ERF system, for example the electrode surface morphology and DC electric field etc, are easily to be found by this method. Furthermore, the influence of leaky current is discussed also.

  15. Performance Evaluation and Parameter Identification on DROID III

    Science.gov (United States)

    Plumb, Julianna J.

    2011-01-01

    The DROID III project consisted of two main parts. The former, performance evaluation, focused on the performance characteristics of the aircraft such as lift to drag ratio, thrust required for level flight, and rate of climb. The latter, parameter identification, focused on finding the aerodynamic coefficients for the aircraft using a system that creates a mathematical model to match the flight data of doublet maneuvers and the aircraft s response. Both portions of the project called for flight testing and that data is now available on account of this project. The conclusion of the project is that the performance evaluation data is well-within desired standards but could be improved with a thrust model, and that parameter identification is still in need of more data processing but seems to produce reasonable results thus far.

  16. Performance Evaluation of Air-Based Heat Rejection Systems

    Directory of Open Access Journals (Sweden)

    Hannes Fugmann

    2015-01-01

    Full Text Available On the basis of the Number of Transfer Units (NTU method a functional relation between electric power for fans/pumps and effectiveness in dry coolers and wet cooling towers is developed. Based on this relation, a graphical presentation method of monitoring and simulation data of heat rejection units is introduced. The functional relation allows evaluating the thermodynamic performance of differently sized heat rejection units and comparing performance among them. The method is used to evaluate monitoring data of dry coolers of different solar cooling field projects. The novelty of this approach is that performance rating is not limited by a design point or standardized operating conditions of the heat exchanger, but is realizable under flexible conditions.

  17. Evaluation of Process Performance for Sustainable Hard Machining

    Science.gov (United States)

    Rotella, Giovanna; Umbrello, Domenico; , Oscar W. Dillon, Jr.; Jawahir, I. S.

    This paper aims to evaluate the sustainability performance of machining operation of through-hardening steel, AISI 52100, taking into account the impact of the material removal process in its various aspects. Experiments were performed for dry and cryogenic cutting conditions using chamfered cubic boron nitride (CBN) tool inserts at varying cutting conditions (cutting speed and feed rate). Cutting forces, mechanical power, tool wear, white layer thickness, surface roughness and residual stresses were investigated in order to evaluate the effects of extreme in-process cooling on the machined surface. The results indicate that cryogenic cooling has the potential to be used for surface integrity enhancement for improved product life and more sustainable functional performance.

  18. 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.

  19. African Primary Care Research: Performing a programme evaluation

    Directory of Open Access Journals (Sweden)

    Lilian Dudley

    2014-06-01

    Full Text Available This article is part of a series on Primary Care Research in the African context and focuses on programme evaluation. Different types of programme evaluation are outlined: developmental, process, outcome and impact. Eight steps to follow in designing your programme evaluation are then described in some detail: engage stakeholders; establish what is known; describe the programme; define the evaluation and select a study design; define the indicators; plan and manage data collection and analysis; make judgements and recommendations; and disseminate the findings. Other articles in the series cover related topics such as writing your research proposal, performing a literature review, conducting surveys with questionnaires, qualitative interviewing and approaches to quantitative and qualitative data analysis.

  20. Performance Evaluation of search engines via user effort measures

    Directory of Open Access Journals (Sweden)

    Rajesh Kumar Goutam

    2012-07-01

    Full Text Available Many metrics exist to perform the task of search engine evaluation that are either looking for the experts judgments or believe in searchers decisions about the relevancy of the web documents. However, search logs can provide us information about how real users search. This paper explains, our attempts to incorporate the users searching behavior in formulation of user efforts centric evaluation metric. We also incorporate two dimensional users traversing approach in the ERR metric. After the formulation of the evaluation metric, authors judge its goodness and found that presented metric fulfills all the requirements that are needed for a metric to be mathematically accurate. The findings obtained from experiments, present a complete description for search engine evaluation procedure.

  1. SENSE AND NEED OF EVALUATION OF TEACHERS PERFORMANCE

    Directory of Open Access Journals (Sweden)

    Francisco Javier Fernández Franco

    2010-10-01

    Full Text Available After the evaluation-for-diagnose tests for the 2009-2010 course have been given and the results of the national evaluation-for-diagnose of the previous year -carried out by the National Institute for Evaluation- are soon to be published, it looks quite convenient to reflect on the different resources that teachers have got at their reach to improve their mission. It looks self-evident that accountability of teachers' performance is necessary. In the present article, we provide reasons for such evaluation with motivation on legal grounds and aiming at some specific ends, to conclude with a proposal for all the segments of people involved in education.

  2. 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.

  3. Blind Source Parameters for Performance Evaluation of Despeckling Filters

    Directory of Open Access Journals (Sweden)

    Nagashettappa Biradar

    2016-01-01

    Full Text Available 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.

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

    Science.gov (United States)

    Trautwein, Uwe; Schneider, Christian; Thomä, Reiner

    2005-12-01

    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.

  5. 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.

  6. Instructor’s Performance: A Proposed Model for Online Evaluation

    Directory of Open Access Journals (Sweden)

    Salah Alkhafaji

    2013-10-01

    Full Text Available Currently due to high awareness and quality audits, the higher education institutions have made to keep a track on various performances of the institutions. One such most important activity that has to be analyzed and evaluated is Instructor’s classroom performance. As the students are the main stakeholders of the educational process, their concerns over the instructor, teaching pedagogies and methodologies, assessment techniques need to be collected and analyzed for achieving the institution’s goals and objectives. The students shall give their opinions related to the various performance indicators of instructor.In general, the higher education institutions use various techniques to evaluate instructor’s performance in the classroom from the students. The latest technological developments help in data collection using web technologies. Online system with required questionnaire and attributes will help the higher education institutions in easy data collection. Apart from that the students shall give their opinions without any fear from any place and at any time. In this paper, we have identified the major factors and users of an instructor online evaluation system. Also, we have proposed a model for such system with subsystem interface, entity relationship diagram and context diagram.

  7. Performance in physiology evaluation: possible improvement by active learning strategies.

    Science.gov (United States)

    Montrezor, Luís H

    2016-12-01

    The evaluation process is complex and extremely important in the teaching/learning process. Evaluations are constantly employed in the classroom to assist students in the learning process and to help teachers improve the teaching process. The use of active methodologies encourages students to participate in the learning process, encourages interaction with their peers, and stimulates thinking about physiological mechanisms. This study examined the performance of medical students on physiology over four semesters with and without active engagement methodologies. Four activities were used: a puzzle, a board game, a debate, and a video. The results show that engaging in activities with active methodologies before a physiology cognitive monitoring test significantly improved student performance compared with not performing the activities. We integrate the use of these methodologies with classic lectures, and this integration appears to improve the teaching/learning process in the discipline of physiology and improves the integration of physiology with cardiology and neurology. In addition, students enjoy the activities and perform better on their evaluations when they use them. Copyright © 2016 The American Physiological Society.

  8. Student Performance and Attitudes under Formative Evaluation by Teacher, Self and Peer Evaluators

    Science.gov (United States)

    Ozogul, Gamze; Sullivan, Howard

    2009-01-01

    This study investigated the effects of teacher, self and peer evaluation on preservice teachers' performance, knowledge and attitudes. Earlier research by the same authors revealed that students made significant improvements in their lesson plans under all three of these conditions, but the teacher-evaluation improved significantly more than the…

  9. 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.

  10. Performance Evaluation of Spectral Amplitude Codes for OCDMA PON

    DEFF Research Database (Denmark)

    Binti Othman, Maisara; Jensen, Jesper Bevensee; Zhang, Xu;

    2011-01-01

    In this paper, we present a performance evaluation of three codes; enhanced double weight (EDW), random diagonal (RD) and zero cross correlation (ZCC) for 10 Gb/s x 4 user, 20 km standard SMF transmission link for OCDMA PON. These SAC codes have ideal in-phase cross-correlation properties to reduce...... the MAI effects in OCDMA. The performance has been characterized through received optical power (ROP) sensitivity and dispersion tolerance assessments. The numerical results show that the ZCC code has a slightly better performance compared to the other two codes for the ROP and similar behavior against...... the dispersion tolerence. In the analysis we also consider the character of the code properties and the flexibility as criteria for OCDMA PON network instead of the performance....

  11. EVALUATING AND IMPROVING THE PERFORMANCE OF COLD ASPHALT EMULSION MIXES

    Directory of Open Access Journals (Sweden)

    I Nyoman Arya Thanaya

    2007-01-01

    Full Text Available This paper describes investigation on the performances of cold asphalt emulsion mixes (CAEMs. The type of emulsion used was a cationic asphalt emulsion. The investigation was carried out at Leeds University, United Kingdom (UK. The objective of the experiments was to evaluate and to improve the performances of cold mixes and compared with hot mixes. For optimising the performances of the cold mixes, a target porosity of five to ten percent and indirect tensile stiffness modulus (ITSM value of 2000 MPa was selected, suitable for low to medium trafficked roads. A simplified mix design procedure was used for producing the cold mixes. It was found that when properly designed, at full curing conditions, the stiffness (ITSM of CAEMs were found to be very comparable to those of hot mixes. Test results also show that the addition of cement in the amount of one to two percent by mass of aggregates significantly improved the mechanical performance of cold asphalt mixes.

  12. Performance evaluation in assets management with the AHP

    Directory of Open Access Journals (Sweden)

    Luiz Flávio Autran Monteiro Gomes

    2012-04-01

    Full Text Available The main objective of this article is to develop a transparent and efficient model, using the AHP (Analytic Hierarchy Process method as a basis and applying the software SuperDecisions, which makes it possible to evaluate the performance of employees, aligning the individual objectives defined and the competences required for the organisational mission. The methodology used was of an investigative and exploratory nature, due to the need to increase knowledge on the use of the AHP in the process of classifying employee performance. Starting from a high performance culture, it is possible to highlight the employees who present the best performance and improve the remuneration policies, as well as invest in the training of the skills lacking in a clear and assertive manner. The results found in this research prove the viability of the respective application, which is directly related to the meeting of targets and, consequently,to sustaining competitiveness and increasing added value for shareholders.

  13. Theoretical fundament modifications performed in the evaluation system at the Internal Medicine ward round performance.

    Directory of Open Access Journals (Sweden)

    Luis Alberto Corona Martínez

    2003-04-01

    Full Text Available The medical clinic department in the medicine school located in Cienfuegos city, Cuba performed modifications to the evaluation system in the subject Internal Medicine during the academic course 1999-2000. The main ideas are shown in this investigation constituting the theoretical backgrounds of the changes performed due to the identified deficiencies found and based on the actual pedagogical concepts and acceptation. It is emphasized on the need that the whole system of evaluation should be pertinent, productive, wide, profound, and conformed by the diversity of instruments, so that its instructive, educative, oriented, motivated, and feedback functions should be accomplished.

  14. 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.

  15. Performance Evaluation and Dimensioning of /// Systems through Kernel Estimation

    Directory of Open Access Journals (Sweden)

    G. M. Gontijo

    2011-01-01

    Full Text Available We extend the analysis of queueing systems for real-life situations, where the arrival pattern of customers is unknown. In real systems, we must understand how the choice of a method of estimation influences the configuration of the system. Using kernel smoothing, we evaluate algorithms to estimate performance measures of a /// system, including the invariant probability distribution of the number of customers in the system, the blocking probability, the average queue size, and the average client queue time. We successfully apply the method to the arrivals to a call center to plan and improve the performance of these important queueing systems.

  16. Additional parameter in evaluating the performance of intermittent solar refrigerators

    Energy Technology Data Exchange (ETDEWEB)

    El-Shaarawi, M.A.I.; Ramadan, R.A.

    1988-01-01

    The parameters which have been considered by previous investigators in evaluating the performance of intermittent solar refrigerators are: the maximum attainable generator temperature, the condensing temperature and the initial solution conditions. The present investigation shows that an additional parameter, viz. the temperature of the condensate at the beginning of the absorption process, should be taken into consideration. Results of a thermodynamic analysis for the theoretical constant-temperature-absorption refrigeration cycle reveal that this parameter has considerable influence on the performance of intermittent solar refrigerators utilizing an ammonia-water solution as the working fluid.

  17. Coordinated design and performance evaluation of UPFC supplementary modulation controllers

    Energy Technology Data Exchange (ETDEWEB)

    Padiyar, K.R.; Saikumar, H.V. [Indian Inst. of Science, Dept. of Electrical Engineering, Bangalore (India)

    2005-02-01

    Mitigation of low-frequency electro-mechanical oscillations is essential for secure operation of power systems. The fast acting, power electronics based FACTS controllers which are capable of improving both steady state and dynamic performance permit newer approaches to system stabilization. The objective of the work presented in this paper is to carry out a coordinated design of supplementary modulation controllers (SMCs) for UPFC and to evaluate their performance. The effectiveness of the SMCs in damping the critical modes is tested on a four machine, 10 bus system. (Author)

  18. Roles and methods of performance evaluation of hospital academic leadership.

    Science.gov (United States)

    Zhou, Ying; Yuan, Huikang; Li, Yang; Zhao, Xia; Yi, Lihua

    2016-01-01

    The rapidly advancing implementation of public hospital reform urgently requires the identification and classification of a pool of exceptional medical specialists, corresponding with incentives to attract and retain them, providing a nucleus of distinguished expertise to ensure public hospital preeminence. This paper examines the significance of academic leadership, from a strategic management perspective, including various tools, methods and mechanisms used in the theory and practice of performance evaluation, and employed in the selection, training and appointment of academic leaders. Objective methods of assessing leadership performance are also provided for reference.

  19. Performance evaluation and design of flight vehicle control systems

    CERN Document Server

    Falangas, Eric T

    2015-01-01

    This book will help students, control engineers and flight dynamics analysts to model and conduct sophisticated and systemic analyses of early flight vehicle designs controlled with multiple types of effectors and to design and evaluate new vehicle concepts in terms of satisfying mission and performance goals. Performance Evaluation and Design of Flight Vehicle Control Systems begins by creating a dynamic model of a generic flight vehicle that includes a range of elements from airplanes and launch vehicles to re-entry vehicles and spacecraft. The models may include dynamic effects dealing with structural flexibility, as well as dynamic coupling between structures and actuators, propellant sloshing, and aeroelasticity, and they are typically used for control analysis and design. The book shows how to efficiently combine different types of effectors together, such as aero-surfaces, TVC, throttling engines and RCS, to operate as a system by developing a mixing logic atrix. Methods of trimming a vehicle controll...

  20. Performance Evaluation of Data Compression Systems Applied to Satellite Imagery

    Directory of Open Access Journals (Sweden)

    Lilian N. Faria

    2012-01-01

    Full Text Available Onboard image compression systems reduce the data storage and downlink bandwidth requirements in space missions. This paper presents an overview and evaluation of some compression algorithms suitable for remote sensing applications. Prediction-based compression systems, such as DPCM and JPEG-LS, and transform-based compression systems, such as CCSDS-IDC and JPEG-XR, were tested over twenty multispectral (5-band images from CCD optical sensor of the CBERS-2B satellite. Performance evaluation of these algorithms was conducted using both quantitative rate-distortion measurements and subjective image quality analysis. The PSNR, MSSIM, and compression ratio results plotted in charts and the SSIM maps are used for comparison of quantitative performance. Broadly speaking, the lossless JPEG-LS outperforms other lossless compression schemes, and, for lossy compression, JPEG-XR can provide lower bit rate and better tradeoff between compression ratio and image quality.

  1. Routing Protocol Performance Issues and Evaluation Considerations in MANET

    Directory of Open Access Journals (Sweden)

    P.Venkata Maheswara,

    2013-07-01

    Full Text Available Mobile nodes in Wire less a d-hoc networ k need to operate as routers in or d er to maintain the informa tion ab out network connectivity as there is no centralized infrastructure. Therefore,Routing Protocols are required which could adapt dynamically to the changing topologies and works at low data rates. As are sult, there arises a need for the compreh ensive performance evaluation of the ad-doc routing protocols in same frame work to under stand their comparative merits and suitability for deployment in different scenarios. In this paper the protocols suite selected for comparison are AODV, DSR, TORA and OLSR ad- hoc routing protocols, as these were the most promising from all other protocols. The performance of these protocols is evaluated through exhaustive simulations using the OPNET Model network simulator under different parameters like routing over head, delay , throughput and network load under varying the mobile nodes .

  2. Evaluating performance of container terminal operation using simulation

    Science.gov (United States)

    Nawawi, Mohd Kamal Mohd; Jamil, Fadhilah Che; Hamzah, Firdaus Mohamad

    2015-05-01

    A container terminal is a facility where containers are transshipped from one mode of transport to another. Congestion problem leads to the decreasing of the customer's level of satisfaction. This study presents the application of simulation technique with the main objective of this study is to develop the current model and evaluate the performance of the container terminal. The suitable performance measure used in this study to evaluate the container terminal model are the average waiting time in queue, average of process time at berth, number of vessels enter the berth and resource utilization. Simulation technique was found to be a suitable technique to conduct in this study. The results from the simulation model had proved to solve the problem occurred in the container terminal.

  3. 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....... Relevant kinetic parameters are determined from differential scanning calorimeter (DSC) experiments and the model is used to simulate the severity of the inactivation reaction for temperatures and moisture levels relevant for spray drying. After conducting experiments and subsequent simulations...... 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....

  4. Performance evaluation of advanced industrial SPECT system with diverging collimator.

    Science.gov (United States)

    Park, Jang Guen; Jung, Sung-Hee; Kim, Jong Bum; Moon, Jinho; Yeom, Yeon Soo; Kim, Chan Hyeong

    2014-12-01

    An advanced industrial SPECT system with 12-fold-array diverging collimator was developed for flow visualization in industrial reactors and was discussed in the previous study. The present paper describes performance evaluation of the SPECT system under both static- and dynamic- flow conditions. Under static conditions, the movement of radiotracer inside the test reactor was compared with that of color tracer (blue ink) captured with a high-speed camera. The comparison of the reconstructed images obtained with the radiotracer and the SPECT system showed fairly good agreement with video-frames of the color tracer obtained with the camera. Based on the results of the performance evaluation, it is concluded that the SPECT system is suitable for investigation and visualization of flows in industrial flow reactors.

  5. Throughput Performance Evaluation of Multiservice Multirate OCDMA in Flexible Networks

    DEFF Research Database (Denmark)

    Raddo, Thiago R.; Sanches, Anderson L.; Tafur Monroy, Idelfonso

    2016-01-01

    packet arrivals distributions, with the latter defined as benchmark. A throughput performance evaluation is carried out for two distinct user code sequences separately, namely, 1-D and 2-D multiweight multilength optical orthogonal code (MWML-OOC). Numerical results show that the Poisson approach......In this paper, new analytical formalisms to evaluate the packet throughput of multiservice multirate slotted ALOHA optical code-division multiple-access (OCDMA) networks are proposed. The proposed formalisms can be successfully applied to 1-D and 2-D OCDMA networks with any number of user classes...... underestimates the throughput performance in unacceptable levels and incorrectly predicts the number of successfully received packets for most offered load values even in favorable conditions, such as for the 2-D MWML-OOC OCDMA network with a considerably large number of simultaneous users. On the other hand...

  6. 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.

  7. Evaluation of Activity Recognition Algorithms for Employee Performance Monitoring

    OpenAIRE

    2012-01-01

    Successful Human Resource Management plays a key role in success of any organization. Traditionally, human resource managers rely on various information technology solutions such as Payroll and Work Time Systems incorporating RFID and biometric technologies. This research evaluates activity recognition algorithms for employee performance monitoring. An activity recognition algorithm has been implemented that categorized the activity of employee into following in to classes: job activities and...

  8. Using Fuzzy Logic for Performance Evaluation in Reinforcement Learning

    Science.gov (United States)

    Berenji, Hamid R.; Khedkar, Pratap S.

    1992-01-01

    Current reinforcement learning algorithms require long training periods which generally limit their applicability to small size problems. A new architecture is described which uses fuzzy rules to initialize its two neural networks: a neural network for performance evaluation and another for action selection. This architecture is applied to control of dynamic systems and it is demonstrated that it is possible to start with an approximate prior knowledge and learn to refine it through experiments using reinforcement learning.

  9. 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.

  10. Cost, Power Consumption and Performance Evaluation of Metro Networks

    OpenAIRE

    Bianco, Andrea; Bonald, Thomas; Cuda, Davide; Indre, Raluca-Maria

    2013-01-01

    International audience; We provide models for evaluating the performance, cost and power consumption of different architectures suitable for a metropolitan area network (MAN). We then apply these models to compare today's SONET/SDH metro rings with different alternatives envisaged for next-generation MAN: an Ethernet-carrier grade ring, an optical hub-based architecture and an optical time-slotted WDM ring. Our results indicate that the optical architectures are likely to decrease power consu...

  11. Project Startup: Evaluating the Performance of Electric Buses

    Energy Technology Data Exchange (ETDEWEB)

    2016-04-01

    The National Renewable Energy Laboratory (NREL) is evaluating the in-service performance of fast-charge battery electric buses compared to compressed natural gas (CNG) buses operated by Foothill Transit in West Covina, California. Launched in 2015 in collaboration with the California Air Resources Board, this study aims to improve understanding of the overall use and effectiveness of fast-charge electric buses and associated charging infrastructure in transit operation.

  12. Evaluation of high-definition television for remote task performance

    Energy Technology Data Exchange (ETDEWEB)

    Draper, J.V.; Fujita, Y.; Herndon, J.N.

    1987-04-01

    High-definition television (HDTV) transmits a video image with more than twice the number (1125 for HDTV to 525 for standard-resolution TV) of horizontal scan lines that standard-resolution TV provides. The improvement in picture quality (compared to standard-resolution TV) that the extra scan lines provide is impressive. Objects in the HDTV picture have more sharply defined edges, better contrast, and more accurate reproduction of shading and color patterns than do those in the standard-resolution TV picture. Because the TV viewing system is a key component for teleoperator performance, an improvement in TV picture quality could mean an improvement in the speed and accuracy with which teleoperators perform tasks. This report describes three experiments designed to evaluate the impact of HDTV on the performance of typical remote tasks. The performance of HDTV was compared to that of standard-resolution, monochromatic TV and standard-resolution, stereoscopic, monochromatic TV in the context of judgment of depth in a televised scene, visual inspection of an object, and performance of a typical remote handling task. The results of the three experiments show that in some areas HDTV can lead to improvement in teleoperator performance. Observers inspecting a small object for a flaw were more accurate with HDTV than with either of the standard-resolution systems. High resolution is critical for detection of small-scale flaws of the type in the experiment (a scratch on a glass bottle). These experiments provided an evaluation of HDTV television for use in tasks that must be routinely performed to remotely maintain a nuclear fuel reprocessing facility. 5 refs., 7 figs., 9 tabs.

  13. Performance evaluation of artificial intelligence classifiers for the medical domain.

    Science.gov (United States)

    Smith, A E; Nugent, C D; McClean, S I

    2002-01-01

    The application of artificial intelligence systems is still not widespread in the medical field, however there is an increasing necessity for these to handle the surfeit of information available. One drawback to their implementation is the lack of criteria or guidelines for the evaluation of these systems. This is the primary issue in their acceptability to clinicians, who require them for decision support and therefore need evidence that these systems meet the special safety-critical requirements of the domain. This paper shows evidence that the most prevalent form of intelligent system, neural networks, is generally not being evaluated rigorously regarding classification precision. A taxonomy of the types of evaluation tests that can be carried out, to gauge inherent performance of the outputs of intelligent systems has been assembled, and the results of this presented in a clear and concise form, which should be applicable to all intelligent classifiers for medicine.

  14. Oil Bypass Filter Technology Performance Evaluation - January 2003 Quarterly Report

    Energy Technology Data Exchange (ETDEWEB)

    Laurence R. Zirker; James E. Francfort

    2003-01-01

    This report details the initial activities to evaluate the performance of the oil bypass filter technology being tested by the Idaho National Engineering and Environmental Laboratory (INEEL) for the U.S. Department of Energy's FreedomCAR & Vehicle Technologies Program. Eight full-size, four-cycle diesel-engine buses used to transport INEEL employees on various routes have been equipped with oil bypass systems from the puraDYN Corporation. Each bus averages about 60,000 miles a year. The evaluation includes an oil analysis regime to monitor the presence of necessary additives in the oil and to detect undesirable contaminants. Very preliminary economic analysis suggests that the oil bypass system can reduce life-cycle costs. As the evaluation continues and oil avoidance costs are quantified, it is estimated that the bypass system economics may prove increasingly favorable, given the anticipated savings in operational costs and in reduced use of oil and waste oil avoidance.

  15. Oil Bypass Filter Technology Performance Evaluation - First Quarterly Report

    Energy Technology Data Exchange (ETDEWEB)

    Zirker, L.R.; Francfort, J.E.

    2003-01-31

    This report details the initial activities to evaluate the performance of the oil bypass filter technology being tested by the Idaho National Engineering and Environmental Laboratory (INEEL) for the U.S. Department of Energy's FreedomCAR & Vehicle Technologies Program. Eight full-size, four-cycle diesel-engine buses used to transport INEEL employees on various routes have been equipped with oil bypass systems from the puraDYN Corporation. Each bus averages about 60,000 miles a year. The evaluation includes an oil analysis regime to monitor the presence of necessary additives in the oil and to detect undesirable contaminants. Very preliminary economic analysis suggests that the oil bypass system can reduce life-cycle costs. As the evaluation continues and oil avoidance costs are quantified, it is estimated that the bypass system economics may prove increasingly favorable, given the anticipated savings in operational costs and in reduced use of oil and waste oil avoidance.

  16. Performance Evaluation and Benchmarking of Next Intelligent Systems

    Energy Technology Data Exchange (ETDEWEB)

    del Pobil, Angel [Jaume-I University; Madhavan, Raj [ORNL; Bonsignorio, Fabio [Heron Robots, Italy

    2009-10-01

    Performance Evaluation and Benchmarking of Intelligent Systems presents research dedicated to the subject of performance evaluation and benchmarking of intelligent systems by drawing from the experiences and insights of leading experts gained both through theoretical development and practical implementation of intelligent systems in a variety of diverse application domains. This contributed volume offers a detailed and coherent picture of state-of-the-art, recent developments, and further research areas in intelligent systems. The chapters cover a broad range of applications, such as assistive robotics, planetary surveying, urban search and rescue, and line tracking for automotive assembly. Subsystems or components described in this book include human-robot interaction, multi-robot coordination, communications, perception, and mapping. Chapters are also devoted to simulation support and open source software for cognitive platforms, providing examples of the type of enabling underlying technologies that can help intelligent systems to propagate and increase in capabilities. Performance Evaluation and Benchmarking of Intelligent Systems serves as a professional reference for researchers and practitioners in the field. This book is also applicable to advanced courses for graduate level students and robotics professionals in a wide range of engineering and related disciplines including computer science, automotive, healthcare, manufacturing, and service robotics.

  17. Performance evaluation of similarity measures for dense multimodal stereovision

    Science.gov (United States)

    Yaman, Mustafa; Kalkan, Sinan

    2016-05-01

    Multimodal imaging systems have recently been drawing attention in fields such as medical imaging, remote sensing, and video surveillance systems. In such systems, estimating depth has become possible due to the promising progress of multimodal matching techniques. We perform a systematic performance evaluation of similarity measures frequently used in the literature for dense multimodal stereovision. The evaluated measures include mutual information (MI), sum of squared distances, normalized cross-correlation, census transform, local self-similarity (LSS) as well as descriptors adopted to multimodal settings, like scale invariant feature transform (SIFT), speeded-up robust features (SURF), histogram of oriented gradients (HOG), binary robust independent elementary features, and fast retina keypoint (FREAK). We evaluate the measures over datasets we generated, compiled, and provided as a benchmark and compare the performances using the Winner Takes All method. The datasets are (1) synthetically modified four popular pairs from the Middlebury Stereo Dataset (namely, Tsukuba, Venus, Cones, and Teddy) and (2) our own multimodal image pairs acquired using the infrared and the electro-optical cameras of a Kinect device. The results show that MI and HOG provide promising results for multimodal imagery, and FREAK, SURF, SIFT, and LSS can be considered as alternatives depending on the multimodality level and the computational complexity requirements of the intended application.

  18. Performance Evaluation of the ISS Water Processor Multifiltration Beds

    Science.gov (United States)

    Bowman, Elizabeth M.; Carter, Layne; Wilson, Mark; Cole, Harold; Orozco, Nicole; Snowdon, Doug

    2012-01-01

    The ISS Water Processor Assembly (WPA) produces potable water from a waste stream containing humidity condensate and urine distillate. The primary treatment process is achieved in the Multifiltration Bed, which includes adsorbent media and ion exchange resin for the removal of dissolved organic and inorganic contaminants. The first Multifiltration Bed was replaced on ISS in July 2010 after initial indication of inorganic breakthrough. This bed was returned to ground in July 2011 for an engineering investigation. The water resident in the bed was analyzed for various parameters to evaluate adsorbent loading, performance of the ion exchange resin, microbial activity, and generation of leachates from the ion exchange resin. Portions of the adsorbent media and ion exchange resin were sampled and subsequently desorbed to identify the primary contaminants removed at various points in the bed. In addition, an unused Multifiltration Bed was evaluated after two years in storage to assess the generation of leachates during storage. This assessment was performed to evaluate the possibility that these leachates are impacting performance of the Catalytic Reactor located downstream of the Multifiltration Bed. The results of these investigations and implications to the operation of the WPA on ISS are documented in this paper.

  19. Performance evaluation of fiber optic components in nuclear plant environments

    Energy Technology Data Exchange (ETDEWEB)

    Hastings, M.C.; Miller, D.W. [Ohio State Univ., Columbus, OH (United States); James, R.W. [Electric Power Research Institute, Palo Alto, CA (United States)

    1996-03-01

    Over the past several years, the Electric Power Research Institute (EPRI) has funded several projects to evaluate the performance of commercially available fiber optic cables, connective devices, light sources, and light detectors under environmental conditions representative of normal and abnormal nuclear power plant operating conditions. Future projects are planned to evaluate commercially available fiber optic sensors and to install and evaluate performance of instrument loops comprised of fiber optic components in operating nuclear power plant applications. The objective of this research is to assess the viability of fiber optic components for replacement and upgrade of nuclear power plant instrument systems. Fiber optic instrument channels offer many potential advantages: commercial availability of parts and technical support, small physical size and weight, immunity to electromagnetic interference, relatively low power requirements, and high bandwidth capabilities. As existing nuclear power plants continue to replace and upgrade I&C systems, fiber optics will offer a low-cost alternative technology which also provides additional information processing capabilities. Results to date indicate that fiber optics are a viable technology for many nuclear applications, both inside and outside of containments. This work is funded and manage& under the Operations & Maintenance Cost Control research target of EPRI`s Nuclear Power Group. The work is being performed by faculty and students in the Mechanical and Nuclear Engineering Departments and the staff of the Nuclear Reactor Laboratory of the Ohio State University.

  20. Evaluating the Performance of Taiwan Homestay Using Analytic Network Process

    Directory of Open Access Journals (Sweden)

    Yi-Chung Hu

    2012-01-01

    Full Text Available Homestay industry in Taiwan is not only thriving, but also its operation is moving gradually toward elaboration strategy and in a specialized-operation manner these years. Nevertheless, the evaluation frameworks of the earlier studies were sporadically constructed from an overall perspective of homestays. Moreover, the functions, operational model, and natures of homestays are dissimilar to those of hotels; therefore, if the evaluation criteria of homestays employ the ones of hotels, it would appear to be incoherent and incompatible. This study has accordingly developed and constructed a set of evaluation indicators tailor-made for homestay sector through discussion of literatures and interviewing experts so that the evaluation framework would be more comprehensive and more practical. In the process of interviewing experts, it was discovered that dependences lay on the aspects and criteria. Consequently, this research chose the ANP (analytic network process to get the weights and, further, to acquire the homestay business performance through fuzzy theory. The result reveals, as regards key aspects, homestay proprietors and customer groups both weight the surroundings of the building and features, service quality, operation, and management most. In respect to overall homestay performance, customer groups consider it has reached the satisfactory level.

  1. Demand Side Management Performance Evaluation for Commercial Enterprises

    Directory of Open Access Journals (Sweden)

    Jun Dong

    2016-10-01

    Full Text Available Demand Side Management in power systems plays an important role in ensuring a reliable power supply and protecting the environment. Demand Side Management in the commercial sector is vital for sustainable development during China’s industrial restructuring. A hybrid multi-criteria decision making framework for evaluating Demand Side Management performance of commercial enterprises is proposed from a sustainability perspective. A fuzzy Analytic Hierarchy Process is employed to determine the weights of the criteria and a fuzzy technique for order preference by similarity to an ideal solution is applied to rank Demand Side Management performance. An evaluation index system is built, containing economic, social, environmental and technical criteria associated with 15 sub-criteria. Four groups of expert panels from government departments, research institutions, electricity utilities and commercial enterprises gave judgments on criteria weights and criteria performances for alternatives. The effectiveness of the proposed hybrid framework was demonstrated through a case study in Beijing, in which Demand Side Management performances of four alternatives were ranked. Sensitivity analysis results indicate that the hybrid framework is robust.

  2. Evaluation of board performance in Iran's universities of medical sciences.

    Science.gov (United States)

    Sajadi, Haniye Sadat; Maleki, Mohammadreza; Ravaghi, Hamid; Farzan, Homayoun; Aminlou, Hasan; Hadi, Mohammad

    2014-10-01

    The critical role that the board plays in governance of universities clarifies the necessity of evaluating its performance. This study was aimed to evaluate the performance of the boards of medical universities and provide solutions to enhance its performance. The first phase of present study was a qualitative research in which data were collected through face-to-face semi-structured interviews. Data were analyzed by thematic approach. The second phase was a mixed qualitative and quantitative study, with quantitative part in cross-sectional format and qualitative part in content analysis format. In the quantitative part, data were collected through Ministry of Health and Medical Education (MoHME). In the qualitative part, the content of 2,148 resolutions that were selected by using stratified sampling method were analyzed. Participants believed that the boards had no acceptable performance for a long time.RESULTS also indicated the increasing number of meetings and resolutions of the boards in these 21 years. The boards' resolutions were mostly operational in domain and administrative in nature. The share of specific resolutions was more than the general ones. Given the current pace of change and development and the need to timely respond them, it is recommended to accelerate the slow pace of improvement process of the boards. It appears that more delegation and strengthening the position of the boards are the effective strategies to speed up this process.

  3. Performance analysis for KALIMER containment dome and offsite dose evaluation

    Energy Technology Data Exchange (ETDEWEB)

    Hahn, Do Hee; Lee, Y. B.; Kang, C. S.; Cho, Y. H. [Korea Atomic Energy Research Institute, Taejeon (Korea)

    2002-03-01

    In case HCDA (Hypothetical Core Disruptive Accident) occurs, large amount of radionuclide is released and causes significant hazards to environment and public health. To prevent and mitigate the accident consequences, KALIMER containment is designed to constrain release of radionuclide. In this study, performance analysis for KALIMER containment was made to determine whether the containment could maintain its integrity and achieve its purpose in case of HCDA. Performance analysis of KALIMER containment was also made through evaluating radiation dose at site boundary. The performance analysis showed that KALIMER containment could maintain its integrity and achieve its purpose in case of HCDA. Also, it was proved that sodium spray fire can be more important menace to containment integrity than sodium pool fire. Results of dose assessment was different from those of performance analysis. Sodium pool fire caused higher radiation doses than sodium spray fire. But, dose values evaluated for HCDA were much lower than dose limit values for both sodium pool fire and sodium spray fire. 23 refs., 29 figs., 5 tabs. (Author)

  4. Solar power plant performance evaluation: simulation and experimental validation

    Science.gov (United States)

    Natsheh, E. M.; Albarbar, A.

    2012-05-01

    In this work the performance of solar power plant is evaluated based on a developed model comprise photovoltaic array, battery storage, controller and converters. The model is implemented using MATLAB/SIMULINK software package. Perturb and observe (P&O) algorithm is used for maximizing the generated power based on maximum power point tracker (MPPT) implementation. The outcome of the developed model are validated and supported by a case study carried out using operational 28.8kW grid-connected solar power plant located in central Manchester. Measurements were taken over 21 month's period; using hourly average irradiance and cell temperature. It was found that system degradation could be clearly monitored by determining the residual (the difference) between the output power predicted by the model and the actual measured power parameters. It was found that the residual exceeded the healthy threshold, 1.7kW, due to heavy snow in Manchester last winter. More important, the developed performance evaluation technique could be adopted to detect any other reasons that may degrade the performance of the P V panels such as shading and dirt. Repeatability and reliability of the developed system performance were validated during this period. Good agreement was achieved between the theoretical simulation and the real time measurement taken the online grid connected solar power plant.

  5. Fiscal year 1998 Battelle performance evaluation agreement revision 1

    Energy Technology Data Exchange (ETDEWEB)

    DAVIS, T.L.

    1998-10-22

    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-AC08-76RLO1830. In partnership with the Contractor and other key customers, the Department of Energy (DOE) Richland Operations Office has defined six critical outcomes that same as the core for the Contractors performance evaluation. The Contractor also utilizes these outcomes as a basis for overall management of the Laboratory. As stated above six critical outcomes have been established for FY 1998. These outcomes are based on the following needs identified by DOE-HQ, RL and other customers of the Laboratory. Our Energy Research customer desires relevant, quality and cost effective science. Our Environmental Management customer wants technology developed, demonstrated, and deployed to solve environmental cleanup issues. To ensure the diversification and viability of the Laboratory as a National asset, RL and HQ alike want to increase the Science and Technical contributions of PNNL related to its core capabilities. RL wants improved leadership/management, cost-effective operations, and maintenance of a work environment, which fosters innovative thinking and high morale. RL and HQ alike desire compliance with environment, safety and health (ES and H) standards and disciplined conduct of operations for protection of the worker, environment, and the public, As with all of Hanford, DOE expects contribution of the Laboratory to the economic development of the Tri-Cities community, and the region, to build a new local economy that is less reliant on the Hanford mission

  6. Performance Evaluation of Important Ad Hoc Network Protocols

    Directory of Open Access Journals (Sweden)

    2006-01-01

    Full Text Available A wireless ad hoc network is a collection of specific infrastructureless mobile nodes forming a temporary network without any centralized administration. A user can move anytime in an ad hoc scenario and, as a result, such a network needs to have routing protocols which can adopt dynamically changing topology. To accomplish this, a number of ad hoc routing protocols have been proposed and implemented, which include dynamic source routing (DSR, ad hoc on-demand distance vector (AODV routing, and temporally ordered routing algorithm (TORA. Although considerable amount of simulation work has been done to measure the performance of these routing protocols, due to the constant changing nature of these protocols, a new performance evaluation is essential. Accordingly, in this paper, we analyze the performance differentials to compare the above-mentioned commonly used ad hoc network routing protocols. We also analyzed the performance over varying loads for each of these protocols using OPNET Modeler 10.5. Our findings show that for specific differentials, TORA shows better performance over the two on-demand protocols, that is, DSR and AODV. Our findings are expected to lead to further performance improvements of various ad hoc networks in the future.

  7. A Spectral Evaluation of Models Performances in Mediterranean Oak Woodlands

    Science.gov (United States)

    Vargas, R.; Baldocchi, D. D.; Abramowitz, G.; Carrara, A.; Correia, A.; Kobayashi, H.; Papale, D.; Pearson, D.; Pereira, J.; Piao, S.; Rambal, S.; Sonnentag, O.

    2009-12-01

    Ecosystem processes are influenced by climatic trends at multiple temporal scales including diel patterns and other mid-term climatic modes, such as interannual and seasonal variability. Because interactions between biophysical components of ecosystem processes are complex, it is important to test how models perform in frequency (e.g. hours, days, weeks, months, years) and time (i.e. day of the year) domains in addition to traditional tests of annual or monthly sums. Here we present a spectral evaluation using wavelet time series analysis of model performance in seven Mediterranean Oak Woodlands that encompass three deciduous and four evergreen sites. We tested the performance of five models (CABLE, ORCHIDEE, BEPS, Biome-BGC, and JULES) on measured variables of gross primary production (GPP) and evapotranspiration (ET). In general, model performance fails at intermediate periods (e.g. weeks to months) likely because these models do not represent the water pulse dynamics that influence GPP and ET at these Mediterranean systems. To improve the performance of a model it is critical to identify first where and when the model fails. Only by identifying where a model fails we can improve the model performance and use them as prognostic tools and to generate further hypotheses that can be tested by new experiments and measurements.

  8. High-definition television evaluation for remote handling task performance

    Energy Technology Data Exchange (ETDEWEB)

    Fujita, Y.; Omori, E.; Hayashi, S.; Draper, J.V.; Herndon, J.N.

    1986-01-01

    This paper describes experiments designed to evaluate the impact of HDTV on the performance of typical remote tasks. The experiments described in this paper compared the performance of four operators using HDTV with their performance while using other television systems. The experiments included four television systems: (1) high-definition color television, (2) high-definition monochromatic television, (3) standard-resolution monochromatic television, and (4) standard-resolution stereoscopic monochromatic television. The stereo system accomplished stereoscopy by displaying two cross-polarized images, one reflected by a half-silvered mirror and one seen through the mirror. Observers wore a pair of glasses with cross-polarized lenses so that the left eye received only the view from the left camera and the right eye received only the view from the right camera.

  9. A Review of Screw Conveyors Performance Evaluation During Handling Process

    Directory of Open Access Journals (Sweden)

    Hemad Zareiforoush

    2010-04-01

    Full Text Available This paper reviews recent work on screw conveyors performance evaluation during handling process, especially in the case of agricultural grains and bulk materials. Experimental work has been mainly carried out to determine a range of parameters, such as auger dimension, screw rotational speed, screw clearance, conveyor intake length and conveying angle for horizontal, inclined and vertical screw conveyors. Several measurement techniques including theoretical models and DEM have been utilized to study the screw conveyors performance. However, each of these techniques is limited in its application. Difficulties in representing vortex motion and interactions among conveying grains and between the particles and screw rotating flight have so far limited the success of advanced modeling. Further work is needed to be conducted on screw augers performance to understand and improve the agricultural grains and bulk materials handling process.

  10. Performance evaluation of the time delay digital tanlock loop architectures

    Science.gov (United States)

    Al-Kharji Al-Ali, Omar; Anani, Nader; Al-Qutayri, Mahmoud; Al-Araji, Saleh; Ponnapalli, Prasad

    2016-01-01

    This article presents the architectures, theoretical analyses and testing results of modified time delay digital tanlock loop (TDTLs) system. The modifications to the original TDTL architecture were introduced to overcome some of the limitations of the original TDTL and to enhance the overall performance of the particular systems. The limitations addressed in this article include the non-linearity of the phase detector, the restricted width of the locking range and the overall system acquisition speed. Each of the modified architectures was tested by subjecting the system to sudden positive and negative frequency steps and comparing its response with that of the original TDTL. In addition, the performance of all the architectures was evaluated under noise-free as well as noisy environments. The extensive simulation results using MATLAB/SIMULINK demonstrate that the new architectures overcome the limitations they addressed and the overall results confirmed significant improvements in performance compared to the conventional TDTL system.

  11. 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.

  12. 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.

  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. 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.

  15. 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.

  16. Advanced transport systems analysis, modeling, and evaluation of performances

    CERN Document Server

    Janić, Milan

    2014-01-01

    This book provides a systematic analysis, modeling and evaluation of the performance of advanced transport systems. It offers an innovative approach by presenting a multidimensional examination of the performance of advanced transport systems and transport modes, useful for both theoretical and practical purposes. Advanced transport systems for the twenty-first century are characterized by the superiority of one or several of their infrastructural, technical/technological, operational, economic, environmental, social, and policy performances as compared to their conventional counterparts. The advanced transport systems considered include: Bus Rapid Transit (BRT) and Personal Rapid Transit (PRT) systems in urban area(s), electric and fuel cell passenger cars, high speed tilting trains, High Speed Rail (HSR), Trans Rapid Maglev (TRM), Evacuated Tube Transport system (ETT), advanced commercial subsonic and Supersonic Transport Aircraft (STA), conventionally- and Liquid Hydrogen (LH2)-fuelled commercial air trans...

  17. Numerical Simulation of Electromagnetic Radiation from Monopole Handset Antenna%单极手机天线电磁辐射的数值模拟

    Institute of Scientific and Technical Information of China (English)

    龚小亮; 孙玉发; 刘昭谦

    2012-01-01

    在建立手机辐射的电磁模型和分层球型人脑模型基础上,利用时域有限差分法计算了900 MHz频率时单极手机天线作用下人脑内比吸收率的分布,重点讨论了在不同通话情况下手机距人体头部不同距离时人脑中比吸收率的分布情况.计算结果表明:手机距人体头部越近人脑内比吸收率值越大,当戴有金属边框眼镜或在金属壁旁通话时,人脑内比吸收率会有不同程度的增加.%The electromagnetic models of cellular phone and layered human head were established,the specific-absorption-rates ( SAR) distribution in human head illuminated by a monopole antenna of handset at the frequency of 900 MHz was calculated by the finite-difference-time-domain( FDTD) method. This paper mainly discussed the SAR distribution in human head according to different distances between cellular phone and human head under different circumstances such as using cellular phone with a pair of metal-frame glasses or next to a metal wall. The calculated results show that the closer the mobile phone is to human head, the higher the value of SAR is. What' s more, the value of SAR in human head will be increased when the person is wearing a pair of metal-frame glasses or is calling next to a metal wall.

  18. 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.

  19. Measurement of exposure to personnel performing shielding evaluations

    Directory of Open Access Journals (Sweden)

    Leland Page

    2014-03-01

    Full Text Available Purpose: Determine the exposure to personnel accrued while performing shielding evaluations of diagnostic facilities.Methods: Shielding inspections were performed at three sites: a small animal imaging facility, an imaging center consisting of general x-ray, CT, and PET/CT rooms, and a cardiac catheterization lab. The small animal facility was evaluated using two 20 mCi Tc-99m uncollimated sources. The imaging center was evaluated using a 20 mCi source of F-18 for the PET/CT room and a collimated 25 mCi source of Tc-99m for the CT and x-ray rooms. The catheterization lab was evaluated using an uncollimated 35 mCi vial of Tc-99m. Electronic personal dosimeters (Rados RAD-60R, RADOS Technology Oy Turku, Finland were worn by each of the personnel involved in performing shielding inspections. The cumulative exposure reading from the dosimeter for each surveyor was recorded.Results: The surveyor who positioned the open source at the small animal facility had an exposure reading of 3.5 mR in 5.5 hours. Those who were outside the room surveying the barriers had readings of 0 and 0.1 mR in 5 hours. For the cath lab, the surveyor positioning the source had a reading of 0.4 mR in 30 minutes, while those outside had readings of 0 mR. At the imaging center all personnel surveying the PET/CT room with an open F-18 source had readings of 2.0, 1.1, and 2.9 mR in 4 hours. Surveys of the CT and general radiography rooms with a collimated Tc-99m source had readings of 1.2, 0.9, and 0.2mR in 5 hours.Conclusion: The surveyors who were in the room with the sources had the highest exposures. Using a higher energy source (F-18 also led to higher exposures. By using a collimated source, the time to measure each barrier for penetrations was increased, but the surveyors’ exposures were  lower.---------------------------------------Cite this article as: Page L, Dodge C, Li G, Wendt R. Measurement of exposure to personnel performing shielding evaluations. Int J Cancer

  20. PERFORMANCE EVALUATION OF WIRELESS SENSOR NETWORK UNDER HELLO FLOOD ATTACK

    Directory of Open Access Journals (Sweden)

    Mohammad Abdus Salam

    2016-03-01

    Full Text Available Wireless sensor network (WSN is highly used in many fields. The network consists of tiny lightweight sensor nodes and is largely used to scan or detect or monitor environments. Since these sensor nodes are tiny and lightweight, they put some limitations on resources such as usage of power, processing given task, radio frequency range. These limitations allow network vulnerable to many different types of attacks such as hello flood attack, black hole, Sybil attack, sinkhole, and many more. Among these attacks, hello flood is one of the most important attacks. In this paper,we have analyzed the performance of hello flood attack and compared the network performance as number of attackers increases. Network performance is evaluated by modifying the ad-hoc on demand distance vector (AODV routing protocol by using NS2 simulator. It has been tested under different scenarios like no attacker, single attacker, and multiple attackers to know how the network performance changes. The simulation results show that as the number of attackers increases the performance in terms of throughput and delay changes.

  1. Methodology for Performance Evaluation of Reverse Supply Chain

    Directory of Open Access Journals (Sweden)

    K.Arun Vasantha Geethan

    2011-06-01

    Full Text Available Enterprises around the world are employing reverse supply chain practices to overcome the regulations and generate profit making opportunities. As a result of the rapid progress in technology theproduct lifecycles are shrinking faster than ever. In the face of global competition, heightened environmental regulations and a wealth of additional profits and improved corporate image opportunities, performing the reverse supply chain operations at a world class level is becoming quintessential. These factors in addition to the inherent complexity of reverse supply chains due to the uncertainties associated with the quantity, quality, and timing of returns make returns management all the more complicated. This research spotlights on this particular problem from a consumer electronics industry perspective, as it poses the greatest challenges in handling returns due to the presence of high clock speed products and greater return volume and variability. In this research, Performance Evaluation Analytic for Reverse Logistics Methodology is developed to facilitate decision making from the perspective of an enterprise engaged in reverse logistics. It explores the various reverse logisticsfunctions and product lifecycle stages. It also develops some key business strategies and performance metrics that can be employed to be successful in returns handling. Deployment of this methodology intheir organizations provides them with a real world assessment of what strategies, reverse logistics functions, product lifecycle stages, or key performance indicators impact the Reverse LogisticsPerformance Value, thereby allowing them to continuously improve their returns management capabilities.

  2. Performance evaluation of Effluent Treatment Plant of Dairy Industry

    Directory of Open Access Journals (Sweden)

    Pratiksinh Chavda

    2014-09-01

    Full Text Available Dairy industry is among the most polluting of the food industries in regard to its large water consumption. Dairy is one of the major industries causing water pollution. Considering the increased milk demand, the dairy industry in India is expected to grow rapidly and have the waste generation and related environmental problems are also assumed increased importance. Poorly treated wastewater with high level of pollutants caused by poor design, operation or treatment systems creates major environmental problems when discharged to the surface land or water. Various operations in a dairy industry may include pasteurization, cream, cheese, milk powder etc. Considering the above stated implications an attempt has been made in the present project to evaluate one of the Effluent Treatment Plant for dairy waste. Samples are collected from three points; Collection tank (CT, primary clarifier (PC and Secondary clarifier (SC to evaluate the performance of Effluent Treatment Plant. Parameters analyzed for evaluation of performance of Effluent Treatment Plant are pH, TDS, TSS, COD, and BOD at 200C The pH, TDS, TSS, COD and BOD removal efficiency of Effluent Treatment Plant were 26.14 %, 33.30 %, 93.85 %, 94.19 % and 98.19 % respectively.

  3. A logistical model for performance evaluations of hybrid generation systems

    Energy Technology Data Exchange (ETDEWEB)

    Bonanno, F.; Consoli, A.; Raciti, A. [Univ. of Catania (Italy). Dept. of Electrical, Electronic, and Systems Engineering; Lombardo, S. [Schneider Electric SpA, Torino (Italy)

    1998-11-01

    In order to evaluate the fuel and energy savings, and to focus on the problems related to the exploitation of combined renewable and conventional energies, a logistical model for hybrid generation systems (HGS`s) has been prepared. A software package written in ACSL, allowing easy handling of the models and data of the HGS components, is presented. A special feature of the proposed model is that an auxiliary fictitious source is introduced in order to obtain the power electric balance at the busbars during the simulation state and, also, in the case of ill-sized components. The observed imbalance powers are then used to update the system design. As a case study, the simulation program is applied to evaluate the energetic performance of a power plant relative to a small isolated community, and island in the Mediterranean Sea, in order to establish the potential improvement achievable via an optimal integration of renewable energy sources in conventional plants. Evaluations and comparisons among different-sized wind, photovoltaic, and diesel groups, as well as of different management strategies have been performed using the simulation package and are reported and discussed in order to present the track followed to select the final design.

  4. Fabrication and Performance Evaluation of a Thevetia Nut Cracking Machine

    Directory of Open Access Journals (Sweden)

    M. M. Odewole

    2015-06-01

    Full Text Available Thevetia seed contains about 64 percent of non-edible oil in its oily kernel and this oil can be used for various purposes such as biofuel and bio-oil; making of paints, insecticides, cosmetics, lubricants and cooling oil in electrical transformers. The cakes obtained after oil extraction are incorporated on the field as manure. In order to get quality oil kernels from the hard nuts, there is need to properly crack them; this process of cracking is still a great challenge. As result of the aforementioned problem, this work focused on the design, fabrication and performance evaluation of a thevetia nut cracking machine. The machine works based on the principle of attrition force. Some of the parts designed for were diameter of shaft (13 mm solid shaft and length of belt (A55, power required to operate the machine (2.5 hp, speed of operation (9.14 m/s and the appropriate dimension of angle iron bar of 45 mm × 45 mm × 3 mm was used for the structural support. The fabrication was done systematically followed by the performance evaluation of the machine. The result of the overall cracking efficiency and throughput capacity of the machine were evaluated to be 96.65 % and 510 g⁄min respectively.

  5. ICT evaluation models and performance of medium and small enterprises

    Directory of Open Access Journals (Sweden)

    Bayaga Anass

    2014-01-01

    Full Text Available Building on prior research related to (1 impact of information communication technology (ICT and (2 operational risk management (ORM in the context of medium and small enterprises (MSEs, the focus of this study was to investigate the relationship between (1 ICT operational risk management (ORM and (2 performances of MSEs. To achieve the focus, the research investigated evaluating models for understanding the value of ICT ORM in MSEs. Multiple regression, Repeated-Measures Analysis of Variance (RM-ANOVA and Repeated-Measures Multivariate Analysis of Variance (RM-MANOVA were performed. The findings of the distribution revealed that only one variable made a significant percentage contribution to the level of ICT operation in MSEs, the Payback method (β = 0.410, p < .000. It may thus be inferred that the Payback method is the prominent variable, explaining the variation in level of evaluation models affecting ICT adoption within MSEs. Conclusively, in answering the two questions (1 degree of variability explained and (2 predictors, the results revealed that the variable contributed approximately 88.4% of the variations in evaluation models affecting ICT adoption within MSEs. The analysis of variance also revealed that the regression coefficients were real and did not occur by chance

  6. Imaging acquisition display performance: an evaluation and discussion of performance metrics and procedures.

    Science.gov (United States)

    Silosky, Michael S; Marsh, Rebecca M; Scherzinger, Ann L

    2016-07-08

    When The Joint Commission updated its Requirements for Diagnostic Imaging Services for hospitals and ambulatory care facilities on July 1, 2015, among the new requirements was an annual performance evaluation for acquisition workstation displays. The purpose of this work was to evaluate a large cohort of acquisition displays used in a clinical environment and compare the results with existing performance standards provided by the American College of Radiology (ACR) and the American Association of Physicists in Medicine (AAPM). Measurements of the minimum luminance, maximum luminance, and luminance uniformity, were performed on 42 acquisition displays across multiple imaging modalities. The mean values, standard deviations, and ranges were calculated for these metrics. Additionally, visual evaluations of contrast, spatial resolution, and distortion were performed using either the Society of Motion Pictures and Television Engineers test pattern or the TG-18-QC test pattern. Finally, an evaluation of local nonuniformities was performed using either a uniform white display or the TG-18-UN80 test pattern. Displays tested were flat panel, liquid crystal displays that ranged from less than 1 to up to 10 years of use and had been built by a wide variety of manufacturers. The mean values for Lmin and Lmax for the displays tested were 0.28 ± 0.13 cd/m2 and 135.07 ± 33.35 cd/m2, respectively. The mean maximum luminance deviation for both ultrasound and non-ultrasound displays was 12.61% ± 4.85% and 14.47% ± 5.36%, respectively. Visual evaluation of display performance varied depending on several factors including brightness and contrast settings and the test pattern used for image quality assessment. This work provides a snapshot of the performance of 42 acquisition displays across several imaging modalities in clinical use at a large medical center. Comparison with existing performance standards reveals that changes in display technology and the move from cathode ray

  7. An Evaluation of Performance Characteristics of Primary Display Devices.

    Science.gov (United States)

    Ekpo, Ernest U; McEntee, Mark F

    2016-04-01

    The aim of this study was to complete a full evaluation of the new EIZO RX850 liquid crystal display and compare it to two currently used medical displays in Australia (EIZO GS510 and Barco MDCG 5121). The American Association of Physicists in Medicine (AAPM) Task Group 18 Quality Control test pattern was used to assess the performance of three high-resolution primary medical displays: EIZO RX850, EIZO GS510, and Barco MDCG 5121. A Konica Minolta spectroradiometer (CS-2000) was used to assess luminance response, non-uniformity, veiling glare, and color uniformity. Qualitative evaluation of noise was also performed. Seven breast lesions were displayed on each monitor and photographed with a calibrated 5.5-MP Olympus E-1 digital SLR camera. ImageJ software was used to sample pixel information from each lesion and surrounding background to calculate their conspicuity index on each of the displays. All monitor fulfilled all AAPM acceptance criteria. The performance characteristics for EIZO RX850, Barco MDCG 5121, and EIZO GS510 respectively were as follows: maximum luminance (490, 500.5, and 413 cd/m(2)), minimum luminance (0.724, 1.170, and 0.92 cd/m(2)), contrast ratio (675:1, 428:1, 449:1), just-noticeable difference index (635, 622, 609), non-uniformity (20, 5.92, and 8.5 %), veiling glare (GR = 2465.6, 720.4, 1249.8), and color uniformity (Δu'v' = +0.003, +0.002, +0.002). All monitors demonstrated low noise levels. The conspicuity index (χ) of the lesions was slightly higher in the EIZO RX850 display. All medical displays fulfilled AAPM performance criteria, and performance characteristics of EIZO RX850 are equal to or better than those of the Barco MDCG 5121 and EIZO GS510 displays.

  8. Professional performance evaluation within the Romanian administrative system

    Directory of Open Access Journals (Sweden)

    Cristina MANOLE

    2010-12-01

    Full Text Available The current economic crisis, manifested in the entire world, highlights the need for sustained involvement of the local and regional authorities in each country, in conceiving and implementing Community policies (which already exist at European level having an essential role in implementing the economic plans achievement. This view was shared by all European Union Member States, of which Romania is part, since 2007. Therefore, the economic crisis which is reflected in the Romanian society today, requires prompt and sustained intervention by the authorities in the execution of the economic recovery plan, implying the community strategies, due to sharply budgetary expenses cut, which is found in all European countries. In order to achieve this major objective, the Romanian authorities should have qualified and properly motivated personnel through an adequate remuneration, according to the training, skills, responsibilities and especially individual performance obtained at each position, as it happens in most developed countries of the European Union. In this context, this study approaches the issues related to the performance evaluation of the public sector’s employees. Considering the fact that strengthening and developing the human resources segment is a strategic goal of the Romanian administration for the period 2008 - 2013, which will lead to modernizing it and making it more efficient (at both central and local level, the personnel performance evaluation, at the organizational level represents a fundamental activity from the human resources’ management perspective.

  9. Perceptual costs for motion transparency evaluated by two performance measures.

    Science.gov (United States)

    Suzuki, Naoto; Watanabe, Osamu

    2009-08-01

    Transparency perception is recognized as one of the important phenomena to understand the computational mechanism of early visual system. Transparency perception indicates that a simple theory reconstructing a single-valued field of a visual attribute, such as an optical-flow field, cannot model the neural mechanism for the human visual system and raises a fundamental issue of how visual attributes are represented and detected in the brain. It is considered that one of the important cues to reveal the neural encoding mechanism for overlapping surfaces is the perceptual cost in transparency perception. It has been known that the perceptual performance in motion transparency is worse than that expected from single motion perception. This perceptual "cost" would reflect the encoding strategy for transparent motions. Here we present a systematic study comparing the perceptual costs in motion transparency evaluated by two performance measures. The result showed that the properties of the perceptual costs varied with the performance measures. The perceptual cost evaluated by the motion detection threshold became smaller as a directional difference between overlapping motions increased, whereas the cost examined with the precision of directional judgments became worse. A computational analysis suggests that these contradictory results cannot be explained by a simple population coding model for motion directions.

  10. Validation of Performance Indicators for Evaluation of Workplace Health Promotion.

    Science.gov (United States)

    Ho, Seung Hee; Chae, Young Moon

    2015-01-01

    To validate performance indicators for evaluating workplace health promotion (WHP) programs based on a logic model and to analyze the structural relationships between constructs. The study design is cross-sectional. Design setting was small manufacturing companies implementing WHP programs provided by the Korea Industrial Health Association. Seventeen occupational health experts completed a questionnaire to determine the content validity of indicators. In addition, 58 health care managers completed a questionnaire to determine reliability and construct validation. The response rate was 84.1%. Based on a logic model, 13 constructs of WHP programs were identified: WHP program input, four activities for workplace environment management, two activities for employee health care management, two outputs, and two short-term outcomes. Interrater agreement index was used for testing the content validity of indicators. Confirmatory factor analysis was used to test for the reliabilities, and the convergent and discriminant validities. Structuring equation modeling was also used to analyze the relationships among constructs. A total of 35 performance indicators from 11 constructs showed good reliability and validity. All relationships among WHP input, activities, outputs, and short-term outcomes were significant, except for the relationship between environment outputs and short-term outcome. These findings illustrate that the logic model and structuring equation modeling can be used to develop and validate performance indicators for planning and evaluation of the WHP program.

  11. 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.

  12. Prior image constrained compressed sensing: a quantitative performance evaluation

    Science.gov (United States)

    Thériault Lauzier, Pascal; Tang, Jie; Chen, Guang-Hong

    2012-03-01

    The appeal of compressed sensing (CS) in the context of medical imaging is undeniable. In MRI, it could enable shorter acquisition times while in CT, it has the potential to reduce the ionizing radiation dose imparted to patients. However, images reconstructed using a CS-based approach often show an unusual texture and a potential loss in spatial resolution. The prior image constrained compressed sensing (PICCS) algorithm has been shown to enable accurate image reconstruction at lower levels of sampling. This study systematically evaluates an implementation of PICCS applied to myocardial perfusion imaging with respect to two parameters of its objective function. The prior image parameter α was shown here to yield an optimal image quality in the range 0.4 to 0.5. A quantitative evaluation in terms of temporal resolution, spatial resolution, noise level, noise texture, and reconstruction accuracy was performed.

  13. Image Quality Assessment for Performance Evaluation of Focus Measure Operators

    Directory of Open Access Journals (Sweden)

    Farida Memon

    2015-10-01

    Full Text Available This paper presents the performance evaluation of eight focus measure operators namely Image CURV (Curvature, GRAE (Gradient Energy, HISE (Histogram Entropy, LAPM (Modified Laplacian, LAPV (Variance of Laplacian, LAPD (Diagonal Laplacian, LAP3 (Laplacian in 3D Window and WAVS (Sum of Wavelet Coefficients. Statistical matrics such as MSE (Mean Squared Error, PNSR (Peak Signal to Noise Ratio, SC (Structural Content, NCC (Normalized Cross Correlation, MD (Maximum Difference and NAE (Normalized Absolute Error are used to evaluate stated focus measures in this research. . FR (Full Reference method of the image quality assessment is utilized in this paper. Results indicate that LAPD method is comparatively better than other seven focus operators at typical imaging conditions

  14. Evaluation of the performance and flow in an axial compressor

    Science.gov (United States)

    Waddell, J. L.

    1982-10-01

    An experimental evaluation of the axial compressor test rig with one stage of symmetric blading was conducted to determine its suitability for studies of tip clearance effects. Measurements were made of performance parameters and internal flow fields. The configuration tested was found to be unsuitable due to poor flow from the inlet guide vanes, particularly near the tip region. Secondary flows and flaws in construction of the guide vanes were suggested as probable causes. Recommendations were made for a program to resolve the problem.

  15. Performance evaluation of PAN nanofiber air filter fabricated by electrospinning

    Energy Technology Data Exchange (ETDEWEB)

    Kim, Kyung Cheol; Kim, Tae Eun; Lee, Jung Koo; Ahn, Ji Woong; Park, Sung Ho; Kim, Hyung Man [Dept. of Electronic, Telecommunications, Mechanical and Automotive Engineering, Inje University, Kimhae (Korea, Republic of)

    2015-11-15

    Nanomaterials possess unique mechanical, physical, and chemical properties. They are small, and have an ultrahigh surface area, making them suitable for air filter applications. Electrospinning has been recognized as an efficient technique for fabricating polymer nanofibers. In order to determine the optimum manufacturing conditions, the effects of several electrospinning process parameters on the diameter, orientation, and distribution of polyacrylonitrile (PAN) nanofiber are analyzed. To improve interlaminar fracture toughness and suppress delamination in the form of laminated non-woven fibers by using a heat roller, the performances of filter efficiency and pressure drop achieved with PAN nanofiber air filter are evaluated experimentally.

  16. Evaluation of Activity Recognition Algorithms for Employee Performance Monitoring

    Directory of Open Access Journals (Sweden)

    Mehreen Mumtaz

    2012-09-01

    Full Text Available Successful Human Resource Management plays a key role in success of any organization. Traditionally, human resource managers rely on various information technology solutions such as Payroll and Work Time Systems incorporating RFID and biometric technologies. This research evaluates activity recognition algorithms for employee performance monitoring. An activity recognition algorithm has been implemented that categorized the activity of employee into following in to classes: job activities and non-job related activities. Finally, the algorithm will compute the time which employee spent in job related and non-job related activities. This paper presents a novel architecture based upon video analytics that can facilitate Human Resource Managers in real time.

  17. Development of evaluation and performance verification technology for radiotherapy radiation

    Energy Technology Data Exchange (ETDEWEB)

    Kim, J. Y.; Jang, S. Y.; Kim, B. H. and others

    2005-02-15

    No matter how much the importance is emphasized, the exact assessment of the absorbed doses administered to the patients to treat the various diseases such as lately soaring malignant tumors with the radiotherapy practices is the most important factor. In reality, several over-exposed patients from the radiotherapy practice become very serious social issues. Especially, the development of a technology to exactly assess the high doses and high energies (In general, dose administered to the patients with the radiotherapy practices are very huge doses, and they are about three times higher than the lethal doses) generated by the radiation generators and irradiation equipment is a competing issue to be promptly conducted. Over fifty medical centers in Korea operate the radiation generators and irradiation equipment for the radiotherapy practices. However, neither the legal and regulatory systems to implement a quality assurance program are sufficiently stipulated nor qualified personnel who could run a program to maintain the quality assurance and control of those generators and equipment for the radiotherapy practices in the medical facilities are sufficiently employed. To overcome the above deficiencies, a quality assurance program such as those developed in the technically advanced countries should be developed to exactly assess the doses administered to patients with the radiotherapy practices and develop the necessary procedures to maintain the continuing performance of the machine or equipment for the radiotherapy. The QA program and procedures should induce the fluent calibration of the machine or equipment with quality, and definitely establish the safety of patients in the radiotherapy practices. In this study, a methodology for the verification and evaluation of the radiotherapy doses is developed, and several accurate measurements, evaluations of the doses delivered to patients and verification of the performance of the therapy machine and equipment are

  18. Performance evaluation of space solar Brayton cycle power systems

    Science.gov (United States)

    Diao, Zheng-Gang

    1992-06-01

    Unlike gas turbine power systems which consume chemical or nuclear energy, the energy consumption and/or cycle efficiency should not be a suitable criterion for evaluating the performance of space solar Brayton cycle power. A new design goal, life cycle cost, can combine all the power system characteristics, such as mass, area, and station-keeping propellant, into a unified criterion. Effects of pressure ratio, recuperator effectiveness, and compressor inlet temperature on life cycle cost were examined. This method would aid in making design choices for a space power system.

  19. The role of a blue ocean strategy on performance evaluation

    OpenAIRE

    Mojtaba Tabari; Mehrdad Ziabari; Mona Radmard; Mahdiyeh Radmard

    2014-01-01

    This paper develops a balanced scorecard (BSC) in order to prepare a comprehensive tool for performance evaluation. In this way, an experimental test is conducted in the Resorts of Ramsar Green City located in the north of Iran, in which the factors of a blue ocean strategy influence on the dimensions of the BSC. The sample number of this study consists of 90 managers and experts of the employees who work for Resorts of Ramsar Green City. The acquired data are analyzed with using the t-test. ...

  20. The role of a blue ocean strategy on performance evaluation

    Directory of Open Access Journals (Sweden)

    Mojtaba Tabari

    2014-08-01

    Full Text Available This paper develops a balanced scorecard (BSC in order to prepare a comprehensive tool for performance evaluation. In this way, an experimental test is conducted in the Resorts of Ramsar Green City located in the north of Iran, in which the factors of a blue ocean strategy influence on the dimensions of the BSC. The sample number of this study consists of 90 managers and experts of the employees who work for Resorts of Ramsar Green City. The acquired data are analyzed with using the t-test. The obtained results show that the blue ocean strategy changes in the objects and the scales of the BSC.

  1. Toward an objective evaluation of cell transfection performance

    Science.gov (United States)

    Orlando, Viviana; Pozzi, Daniela; Caracciolo, Giulio; Augusti-Tocco, Gabriella; Biagioni, Stefano

    2010-10-01

    In this study, we considered the interplay between the efficiency and cytotoxicity of multicomponent cationic liposome/DNA complexes, in cell lines of different origin, as NIH 3T3, HEK 293T, N18TG2, and SK-N-SH. We show that both efficiency and cytotoxicity vary considerably depending on used transfection agents and cells lines. Such variations are largely overcome when transfection is evaluated by a parameter, R, that combines the percentages of transfected, nonviable, and nonadherent cells. These findings provide a strong validation of R as an unbiased indicator for transfection performance across cell lines and transfection agents.

  2. Thermal performance evaluation of the Semco (liquid) solar collector

    Science.gov (United States)

    1979-01-01

    Procedures used and results obtained during the evaluation test program on a flat plate collector which uses water as the working fluid are discussed. The absorber plate is copper tube soldered to copper fin coated with flat black paint. The glazing consists of two plates of Lo-Iron glass; the insulation is polyurethane foam. The collector weight is 242.5 pounds with overall external dimensions of approximately 48.8 in. x 120.8 in. x 4.1 in. The test program was conducted to obtain thermal performance data before and after 34 days of weather exposure test.

  3. Performance Evaluation of Five Turbidity Sensors in Three Primary Standards

    Science.gov (United States)

    Snazelle, Teri T.

    2015-10-28

    Open-File Report 2015-1172 is temporarily unavailable.Five commercially available turbidity sensors were evaluated by the U.S. Geological Survey, Hydrologic Instrumentation Facility (HIF) for accuracy and precision in three types of turbidity standards; formazin, StablCal, and AMCO Clear (AMCO–AEPA). The U.S. Environmental Protection Agency (EPA) recognizes all three turbidity standards as primary standards, meaning they are acceptable for reporting purposes. The Forrest Technology Systems (FTS) DTS-12, the Hach SOLITAX sc, the Xylem EXO turbidity sensor, the Yellow Springs Instrument (YSI) 6136 turbidity sensor, and the Hydrolab Series 5 self-cleaning turbidity sensor were evaluated to determine if turbidity measurements in the three primary standards are comparable to each other, and to ascertain if the primary standards are truly interchangeable. A formazin 4000 nephelometric turbidity unit (NTU) stock was purchased and dilutions of 40, 100, 400, 800, and 1000 NTU were made fresh the day of testing. StablCal and AMCO Clear (for Hach 2100N) standards with corresponding concentrations were also purchased for the evaluation. Sensor performance was not evaluated in turbidity levels less than 40 NTU due to the unavailability of polymer-bead turbidity standards rated for general use. The percent error was calculated as the true (not absolute) difference between the measured turbidity and the standard value, divided by the standard value.The sensors that demonstrated the best overall performance in the evaluation were the Hach SOLITAX and the Hydrolab Series 5 turbidity sensor when the operating range (0.001–4000 NTU for the SOLITAX and 0.1–3000 NTU for the Hydrolab) was considered in addition to sensor accuracy and precision. The average percent error in the three standards was 3.80 percent for the SOLITAX and -4.46 percent for the Hydrolab. The DTS-12 also demonstrated good accuracy with an average percent error of 2.02 percent and a maximum relative standard

  4. Radiosonde pressure sensor performance - Evaluation using tracking radars

    Science.gov (United States)

    Parsons, C. L.; Norcross, G. A.; Brooks, R. L.

    1984-01-01

    The standard balloon-borne radiosonde employed for synoptic meteorology provides vertical profiles of temperature, pressure, and humidity as a function of elapsed time. These parameters are used in the hypsometric equation to calculate the geopotential altitude at each sampling point during the balloon's flight. It is important that the vertical location information be accurate. The present investigation was conducted with the objective to evaluate the altitude determination accuracy of the standard radiosonde throughout the entire balloon profile. The tests included two other commercially available pressure sensors to see if they could provide improved accuracy in the stratosphere. The pressure-measuring performance of standard baroswitches, premium baroswitches, and hypsometers in balloon-borne sondes was correlated with tracking radars. It was found that the standard and premium baroswitches perform well up to about 25 km altitude, while hypsometers provide more reliable data above 25 km.

  5. Performance Evaluation of Wavelet Based on Human Visual System

    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 Daubechies9-7,Daubechies 9-3 and GBCW-9-7 wavelets.The result shows that coding performance of the constructed wavelet is better than Daubechies9-3,and is competitive with Daubechies 9-7 and GBCW-9-7 wavelets.Like Dauechies 9-3 wavelet,the filter coefficients of the constructed waveklet are all dyadic fractions,and the tap is less than Daubechies 9-7 and GBOW 9-7,It has an attractive feature in the realization of discrete wavelet transform.

  6. Performance Evaluation of Industrial Hygiene Air Monitoring Sensors

    Energy Technology Data Exchange (ETDEWEB)

    Maughan, A D.; Glissmeyer, John A.; Birnbaum, Jerome C.

    2004-12-10

    Tests were performed to evaluate the accuracy, precision and response time of certain commercially available handheld toxic gas monitors. The tests were conducted by PNNL in the Chemical Chamber Test Facility for CH2MHill Hanford Company. The instruments were tested with a set of dilute test gases including ammonia, nitrous oxide, and a mixture of organic vapors (acetone, benzene, ethanol, hexane, toluene and xylene). The certified gases were diluted to concentrations that may be encountered in the outdoor environment above the underground tank farms containing radioactive waste at the U.S. Department of Energy's Hanford site, near Richland, Washington. The challenge concentrations are near the lower limits of instrument sensitivity and response time. The performance test simulations were designed to look at how the instruments respond to changes in test gas concentrations that are similar to field conditions.

  7. Evaluation of GPS/BDS indoor positioning performance and enhancement

    Science.gov (United States)

    He, Zhe; Petovello, Mark; Pei, Ling; Olesen, Daniel M.

    2017-02-01

    This paper assesses the potential of using BDS and GPS signals to position in challenged environments such as indoors. Traditional assisted GNSS approaches that use code phase as measurements (i.e., coarse-time solutions) are shown to be prone to multipath and noise. An enhanced approach that has superior sensitivity and positioning performance-the so-called direct positioning receiver architecture-has been implemented and evaluated using live indoor BDS and/or GPS signals. Real indoor experiments have been conducted in Shanghai and significant improvement has been observed with enhanced approaches: results with BDS constellation show better horizontal positioning performance (biases are less than 10 m) than using GPS alone, but are slightly worse in the vertical axis; when using the enhanced approach with BDS and GPS, both horizontal and vertical axes show promising results for the environments considered herein; the coarse-time state converges faster and is more reliable compared to other solutions.

  8. 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.

  9. Performance Evaluation of Pedestrian Locations Based on Contemporary Smartphones

    Directory of Open Access Journals (Sweden)

    Jalal Ibrahim Al-Azizi

    2017-01-01

    Full Text Available Nowadays, a Global Navigation Satellite System (GNSS unit is embedded in nearly every smartphone. This unit allows a smartphone to detect the user’s location and motion, and it makes functions, such as navigation, tracking, and compass applications, available to the user. Therefore, the GNSS unit has become one of the most important features in modern smartphones. However, because most smartphones incorporate relatively low-cost GNSS chips, their localization accuracy varies depending on the number of accessible GNSS satellites, and it is highly dependent on environmental factors that cause interference such as forests and buildings. This research evaluated the performance of the GNSS units inside two different models of smartphones in determining pedestrian locations in different environments. The results indicate that the overall performances of the two devices were related directly to the environment, type of smartphone/GNSS chipset, and the application used to collect the information.

  10. Numerical evaluation of the performance of active noise control systems

    Science.gov (United States)

    Mollo, C. G.; Bernhard, R. J.

    1990-01-01

    This paper presents a generalized numerical technique for evaluating the optimal performance of active noise controllers. In this technique, the indirect BEM numerical procedures are used to derive the active noise controllers for optimal control of enclosed harmonic sound fields where the strength of the noise sources or the description of the enclosure boundary may not be known. The performance prediction for a single-input single-output system is presented, together with the analysis of the stability and observability of an active noise-control system employing detectors. The numerical procedures presented can be used for the design of both the physical configuration and the electronic components of the optimal active noise controller.

  11. Performance evaluation of neuro-PET using silicon photomultipliers

    Energy Technology Data Exchange (ETDEWEB)

    Jung, Jiwoong; Choi, Yong, E-mail: ychoi@sogang.ac.kr; Jung, Jin Ho, E-mail: jinho1115@gmail.com; Kim, Sangsu; Im, Ki Chun

    2016-05-21

    Recently, we have developed the second prototype Silicon photomultiplier (SiPM) based positron emission tomography (PET) scanner for human brain imaging. The PET system was comprised of detector block which consisted of 4×4 SiPMs and 4×4 Lutetium Yttrium Orthosilicate arrays, charge signal transmission method, high density position decoder circuit and FPGA-embedded ADC boards. The purpose of this study was to evaluate the performance of the newly developed neuro-PET system. The energy resolution, timing resolution, spatial resolution, sensitivity, stability of the photo-peak position and count rate performance were measured. Tomographic image of 3D Hoffman brain phantom was also acquired to evaluate imaging capability of the neuro-PET. The average energy and timing resolutions measured for 511 keV gamma rays were 17±0.1% and 3±0.3 ns, respectively. Spatial resolution and sensitivity at the center of field of view (FOV) were 3.1 mm and 0.8%, respectively. The average scatter fraction was 0.4 with an energy window of 350–650 keV. The maximum true count rate and maximum NECR were measured as 43.3 kcps and 6.5 kcps at an activity concentration of 16.7 kBq/ml and 5.5 kBq/ml, respectively. Long-term stability results show that there was no significant change in the photo-peak position, energy resolution and count rate for 60 days. Phantom imaging studies were performed and they demonstrated the feasibility for high quality brain imaging. The performance tests and imaging results indicate that the newly developed PET is useful for brain imaging studies, if the axial FOV is extended to improve the system sensitivity.

  12. Performance evaluation of neuro-PET using silicon photomultipliers

    Science.gov (United States)

    Jung, Jiwoong; Choi, Yong; Jung, Jin Ho; Kim, Sangsu; Im, Ki Chun

    2016-05-01

    Recently, we have developed the second prototype Silicon photomultiplier (SiPM) based positron emission tomography (PET) scanner for human brain imaging. The PET system was comprised of detector block which consisted of 4×4 SiPMs and 4×4 Lutetium Yttrium Orthosilicate arrays, charge signal transmission method, high density position decoder circuit and FPGA-embedded ADC boards. The purpose of this study was to evaluate the performance of the newly developed neuro-PET system. The energy resolution, timing resolution, spatial resolution, sensitivity, stability of the photo-peak position and count rate performance were measured. Tomographic image of 3D Hoffman brain phantom was also acquired to evaluate imaging capability of the neuro-PET. The average energy and timing resolutions measured for 511 keV gamma rays were 17±0.1% and 3±0.3 ns, respectively. Spatial resolution and sensitivity at the center of field of view (FOV) were 3.1 mm and 0.8%, respectively. The average scatter fraction was 0.4 with an energy window of 350-650 keV. The maximum true count rate and maximum NECR were measured as 43.3 kcps and 6.5 kcps at an activity concentration of 16.7 kBq/ml and 5.5 kBq/ml, respectively. Long-term stability results show that there was no significant change in the photo-peak position, energy resolution and count rate for 60 days. Phantom imaging studies were performed and they demonstrated the feasibility for high quality brain imaging. The performance tests and imaging results indicate that the newly developed PET is useful for brain imaging studies, if the axial FOV is extended to improve the system sensitivity.

  13. Performance Evaluation of Terrestrial Emergency Communication System in NPPs

    Energy Technology Data Exchange (ETDEWEB)

    Son, Gwang Sub; Kim, Chang Hwoi; Kang, Hyun Gook [KAERI, Daejeon (Korea, Republic of)

    2014-08-15

    The Fukushima accident induced by the great earthquake and tsunami reveals the vulnerability of I and C System. In the severe environment, the normal I and C system did not work properly and results in false information about the internal situation in NPP. Eventually the accident was not properly handled at the early stage. Therefore advanced emergency response system using a wireless channel is necessary to cope with the severe accident. In this paper, we introduce the ERS consisting of the HMS and MCS the ECS linking the HMS with MCS and the performance requirement of the ECS is analyzed. The ECS satisfying the requirement is designed conceptually and the performance of the ECS is evaluated through analysis and simulator. The terrestrial communication system is designed based on the IEEE 802.11. Analyzed performance results prove that the performance requirement can be sufficiently achieved. But if the scalability of data capacity is considered later, use of the advanced 802.11 standard such as 802.11n and multiple signal paths between the HMS and MCS are necessary.

  14. Experiments evaluating compliance and force feedback effect on manipulator performance

    Science.gov (United States)

    Kugath, D. A.

    1972-01-01

    The performance capability was assessed of operators performing simulated space tasks using manipulator systems which had compliance and force feedback varied. Two manipulators were used, the E-2 electromechanical man-equivalent (force, reach, etc.) master-slave system and a modified CAM 1400 hydraulic master-slave with 100 lbs force capability at reaches of 24 ft. The CAM 1400 was further modified to operate without its normal force feedback. Several experiments and simulations were performed. The first two involved the E-2 absorbing the energy of a moving mass and secondly, guiding a mass thru a maze. Thus, both work and self paced tasks were studied as servo compliance was varied. Three simulations were run with the E-2 mounted on the CAM 1400 to evaluate the concept of a dexterous manipulator as an end effector of a boom-manipulator. Finally, the CAM 1400 performed a maze test and also simulated the capture of a large mass as the servo compliance was varied and with force feedback included and removed.

  15. Performance Evaluation of Communication Software Systems for Distributed Computing

    Science.gov (United States)

    Fatoohi, Rod

    1996-01-01

    In recent years there has been an increasing interest in object-oriented distributed computing since it is better quipped to deal with complex systems while providing extensibility, maintainability, and reusability. At the same time, several new high-speed network technologies have emerged for local and wide area networks. However, the performance of networking software is not improving as fast as the networking hardware and the workstation microprocessors. This paper gives an overview and evaluates the performance of the Common Object Request Broker Architecture (CORBA) standard in a distributed computing environment at NASA Ames Research Center. The environment consists of two testbeds of SGI workstations connected by four networks: Ethernet, FDDI, HiPPI, and ATM. The performance results for three communication software systems are presented, analyzed and compared. These systems are: BSD socket programming interface, IONA's Orbix, an implementation of the CORBA specification, and the PVM message passing library. The results show that high-level communication interfaces, such as CORBA and PVM, can achieve reasonable performance under certain conditions.

  16. Evaluation of angiography performed by radiographers and nurses

    Energy Technology Data Exchange (ETDEWEB)

    Chalmers, N.; Conway, B.; Andrew, H.; Parkinson, A.; Butterfield, J.S.; Fawcitt, R. A

    2002-04-01

    AIM: To evaluate out-patient angiography performed by nurses and radiographers. MATERIALS AND METHODS: A protocol for out-patient angiography performed by nurses and radiographers was drawn up and approved by the Trust's Risk Management Committee. Following training, two experienced radiographers and one nurse undertook elective peripheral or renal angiography according to the protocol on 187 patients. Angiograms were performed using a 3F catheter introduced into the abdominal aorta from a femoral approach. Patients were discharged after 2 hours and contacted by telephone the following morning. RESULTS: No patient refused consent for the procedure. One hundred and seventy-two patients underwent successful catheterization without assistance from a radiologist. Radiologist assistance was required with femoral puncture or catheter/guidewire manipulation in 15 cases (8%). Images were considered diagnostic by the reporting radiologist in all but one case. This patient was recalled for further aortogram and pressure measurements. There was a single puncture site complication due to transient stenosis of the common femoral artery at the puncture site. This is thought to have been the result of subintimal injection of local anaesthetic, and it resolved spontaneously over 30 minutes. There were no delayed complications. CONCLUSION: Experienced nurses and radiographers can rapidly acquire the skills to perform diagnostic angiography safely and efficiently. Chalmers, N. et al. (2002)

  17. Calibratio performance evaluation of the spaceborne hyperspectral CHRIS imager

    Institute of Scientific and Technical Information of China (English)

    ZHANG; Xia; ZHANG; Bing; HU; Fangchao; TONG; Qingxi

    2006-01-01

    The CHRIS (Compact High Resolution Imaging Spectrometer) is a new imaging spectrometer, carried on board a new space platform called PROBA (Project for On Board Autonomy). The satellite was successfully launched in October 2001 by the European Space Agency (ESA). CHRIS operates over the visible/near infrared band (400-1050 nm). It has five work modes and can reach a maximum of 62 spectral bands. In this research, atmospheric correction based on hyperspectral images was performed on CHRIS images by using the popular radiance transfer code ACORN (Atmospheric Correction Now) and empirical algorithms. ACORN was also used to evaluate the calibration performance of CHRIS by the retrieved spectra of typical vegetation and soil. As a result,the maize reflectance spectrum corrected by ACORN could characterize vegetation reflectance in the range of 498-750 nm, but gave a fairly large deviation beyond 750 nm,showing the deficiency of spectral calibration beyond 750 nm. The ACORN-derived soil reflectance decreased beyond 800 nm, which was quite inconsistent with field-spectrummeasurement and showed that the calibration accuracy couldn't meet the requirements of ACORN for spectral and radiometric calibration within a certain spectral range. In addition,the stripes on the retrieved water-vapor content map indicated that the radiance-calibration performance of CHRIS is not perfect. As the first spaceborne hyperspectral imager of ESA, the calibration performance of CHRIS needs to be improved.

  18. Performance Evaluation of Some Index Funds-Indian Perspective

    Directory of Open Access Journals (Sweden)

    Pranav Mishra

    2016-04-01

    Full Text Available The popularity of the index funds as an investment option has increased manifolds ever since they were introduced. This is primarily because of the merits that the investor enjoys through passive style of funds management. This includes the low cost involved in managing such funds and the significant tax savings. Most of the researchers have compared the performance of the actively managed funds with that of index funds. However the index funds of US and for that reason other parts of the world are different from that of India. Unlike other countries in India the benchmark indices comprise of very less number of securities and thus are unable to represent the entire economy. So in Indian context comparison of performance of actively managed funds with index funds is not logical. Therefore this paper attempts to make an intra-class performance evaluation of some Indian index funds based on some statistics. The study includes the use of graphical interpretations coupled with statistical tools like R-square and tracking error values. Two models of tracking error have been employed to test empirically the performance of the selected index funds. The study is useful for those interested in mutual funds, which includes researchers, academicians, and financial advisors. The paper suits the requirement and the situations prevalent in Indian economy during the period under study.

  19. An Overview Study of Performance Evaluation of Intellectual Property Administrative and Judicial Protection in China

    Institute of Scientific and Technical Information of China (English)

    Xu Xingxiang; Luo Juan

    2015-01-01

    Whether IP Administrative and judicial Protection in China is good or bad depends on the evaluation of protection effects of administrative and judicial organs. In China the evaluation system of IP protection performance consists of evaluation principles, evaluation elements and evaluation methods, evaluation principles includes the principle of designing two sets of indicators, the principle of closely linking with China' s national intellectual property strategy, the principle of openness and flexibility of performance evaluation indicators,the principle of standardability of the determination of performance evaluation indicators; evaluation elements consist of evaluator, evaluation tools and objects evaluated; evaluation methods here refers to the Delphi method and the method of network questionary survey.

  20. Quality performance of laboratory testing in pharmacies: a collaborative evaluation.

    Science.gov (United States)

    Zaninotto, Martina; Miolo, Giorgia; Guiotto, Adriano; Marton, Silvia; Plebani, Mario

    2016-11-01

    The quality performance and the comparability between results of pharmacies point-of-care-testing (POCT) and institutional laboratories have been evaluated. Eight pharmacies participated in the project: a capillary specimen collected by the pharmacist and, simultaneously, a lithium-heparin sample drawn by a physician of laboratory medicine for the pharmacy customers (n=106) were analyzed in the pharmacy and in the laboratory, respectively. Glucose, cholesterol, HDL-cholesterol, triglycerides, creatinine, uric acid, aspartate aminotransferase, alanine aminotransferase, were measured using: Reflotron, n=5; Samsung, n=1; Cardiocheck PA, n=1; Cholestech LDX, n=1 and Cobas 8000. The POCT analytical performance only (phase 2) were evaluated testing, in pharmacies and in the laboratory, the lithium heparin samples from a female drawn fasting daily in a week, and a control sample containing high concentrations of glucose, cholesterol and triglycerides. For all parameters, except triglycerides, the slopes showed a satisfactory correlation. For triglycerides, a median value higher in POCT in comparison to the laboratory (1.627 mmol/L vs. 0.950 mmol/L) has been observed. The agreement in the subjects classification, demonstrates that for glucose, 70% of the subjects show concentrations below the POCT recommended level (5.8-6.1 mmol/L), while 56% are according to the laboratory limit (pharmacies and specific criticisms in the pre- and post-analytical phases.

  1. Performance evaluation of image segmentation algorithms on microscopic image data.

    Science.gov (United States)

    Beneš, Miroslav; Zitová, Barbara

    2015-01-01

    In our paper, we present a performance evaluation of image segmentation algorithms on microscopic image data. In spite of the existence of many algorithms for image data partitioning, there is no universal and 'the best' method yet. Moreover, images of microscopic samples can be of various character and quality which can negatively influence the performance of image segmentation algorithms. Thus, the issue of selecting suitable method for a given set of image data is of big interest. We carried out a large number of experiments with a variety of segmentation methods to evaluate the behaviour of individual approaches on the testing set of microscopic images (cross-section images taken in three different modalities from the field of art restoration). The segmentation results were assessed by several indices used for measuring the output quality of image segmentation algorithms. In the end, the benefit of segmentation combination approach is studied and applicability of achieved results on another representatives of microscopic data category - biological samples - is shown.

  2. Performance evaluation of stand alone hybrid PV-wind generator

    Science.gov (United States)

    Nasir, M. N. M.; Saharuddin, N. Z.; Sulaima, M. F.; Jali, Mohd Hafiz; Bukhari, W. M.; Bohari, Z. H.; Yahaya, M. S.

    2015-05-01

    This paper presents the performance evaluation of standalone hybrid system on Photovoltaic (PV)-Wind generator at Faculty of Electrical Engineering (FKE), UTeM. The hybrid PV-Wind in UTeM system is combining wind turbine system with the solar system and the energy capacity of this hybrid system can generate up to charge the battery and supply the LED street lighting load. The purpose of this project is to evaluate the performance of PV-Wind hybrid generator. Solar radiation meter has been used to measure the solar radiation and anemometer has been used to measure the wind speed. The effectiveness of the PV-Wind system is based on the various data that has been collected and compared between them. The result shows that hybrid system has greater reliability. Based on the solar result, the correlation coefficient shows strong relationship between the two variables of radiation and current. The reading output current followed by fluctuate of solar radiation. However, the correlation coefficient is shows moderate relationship between the two variables of wind speed and voltage. Hence, the wind turbine system in FKE show does not operate consistently to produce energy source for this hybrid system compare to PV system. When the wind system does not fully operate due to inconsistent energy source, the other system which is PV will operate and supply the load for equilibrate the extra load demand.

  3. Ridge Distance Estimation in Fingerprint Images: Algorithm and Performance Evaluation

    Directory of Open Access Journals (Sweden)

    Tian Jie

    2004-01-01

    Full Text Available It is important to estimate the ridge distance accurately, an intrinsic texture property of a fingerprint image. Up to now, only several articles have touched directly upon ridge distance estimation. Little has been published providing detailed evaluation of methods for ridge distance estimation, in particular, the traditional spectral analysis method applied in the frequency field. In this paper, a novel method on nonoverlap blocks, called the statistical method, is presented to estimate the ridge distance. Direct estimation ratio (DER and estimation accuracy (EA are defined and used as parameters along with time consumption (TC to evaluate performance of these two methods for ridge distance estimation. Based on comparison of performances of these two methods, a third hybrid method is developed to combine the merits of both methods. Experimental results indicate that DER is 44.7%, 63.8%, and 80.6%; EA is 84%, 93%, and 91%; and TC is , , and seconds, with the spectral analysis method, statistical method, and hybrid method, respectively.

  4. Performance evaluation of stand alone hybrid PV-wind generator

    Energy Technology Data Exchange (ETDEWEB)

    Nasir, M. N. M.; Saharuddin, N. Z.; Sulaima, M. F.; Jali, Mohd Hafiz; Bukhari, W. M.; Bohari, Z. H. [Faculty of Electrical Engineering, Universiti Teknikal Malaysia Melaka (UTeM), Hang Tuah Jaya, 76100 Melaka (Malaysia); Yahaya, M. S. [Faculty of Engineering Technology, Universiti Teknikal Malaysia Melaka (UTeM), Hang Tuah Jaya, 76100 Melaka (Malaysia)

    2015-05-15

    This paper presents the performance evaluation of standalone hybrid system on Photovoltaic (PV)-Wind generator at Faculty of Electrical Engineering (FKE), UTeM. The hybrid PV-Wind in UTeM system is combining wind turbine system with the solar system and the energy capacity of this hybrid system can generate up to charge the battery and supply the LED street lighting load. The purpose of this project is to evaluate the performance of PV-Wind hybrid generator. Solar radiation meter has been used to measure the solar radiation and anemometer has been used to measure the wind speed. The effectiveness of the PV-Wind system is based on the various data that has been collected and compared between them. The result shows that hybrid system has greater reliability. Based on the solar result, the correlation coefficient shows strong relationship between the two variables of radiation and current. The reading output current followed by fluctuate of solar radiation. However, the correlation coefficient is shows moderate relationship between the two variables of wind speed and voltage. Hence, the wind turbine system in FKE show does not operate consistently to produce energy source for this hybrid system compare to PV system. When the wind system does not fully operate due to inconsistent energy source, the other system which is PV will operate and supply the load for equilibrate the extra load demand.

  5. Evaluating the performance of microbial fuel cells powering electronic devices

    Energy Technology Data Exchange (ETDEWEB)

    Dewan, Alim; Beyenal, Haluk [Gene and Linda Voiland School of Chemical Engineering and Bioengineering, Center for Environmental, Sediment and Aquatic Research, Pullman, WA (United States); Donovan, Conrad; Heo, Deukhyoun [School of Electrical Engineering and Computer Science, Washington State University, Pullman, WA 99163-2710 (United States)

    2010-01-01

    A microbial fuel cell (MFC) is capable of powering an electronic device if we store the energy in an external storage device, such as a capacitor, and dispense that energy intermittently in bursts of high-power when needed. Therefore its performance needs to be evaluated using an energy-storing device such as a capacitor which can be charged and discharged rather than other evaluation techniques, such as continuous energy dissipation through a resistor. In this study, we develop a method of testing microbial fuel cell performance based on storing energy in a capacitor. When a capacitor is connected to a MFC it acts like a variable resistor and stores energy from the MFC at a variable rate. In practice the application of this method to testing microbial fuel cells is very challenging and time consuming; therefore we have custom-designed a microbial fuel cell tester (MFCT). The MFCT evaluates the performance of a MFC as a power source. It uses a capacitor as an energy storing device and waits until a desired amount of energy is stored then discharges the capacitor. The entire process is controlled using an analog-to-digital converter (ADC) board controlled by a custom-written computer program. The utility of our method and the MFCT is demonstrated using a laboratory microbial fuel cell (LMFC) and a sediment microbial fuel cell (SMFC). We determine (1) how frequently a MFC can charge a capacitor, (2) which electrode is current-limiting, (3) what capacitor value will allow the maximum harvested energy from a MFC, which is called the ''optimum charging capacitor value,'' and (4) what capacitor charging potential will harvest the maximum energy from a MFC, which is called the ''optimum charging potential.'' Using a LMFC we find that (1) the time needed to charge a 3-F capacitor from 0 to 500 mV is 108 min, (2) the optimum charging capacitor value is 3 F, and (3) the optimum charging potential is 300 mV. Using a SMFC we find that (1

  6. Computerised self-evaluation of performance in professional English

    Directory of Open Access Journals (Sweden)

    Galina Kavaliauskienė

    2014-10-01

    Full Text Available Purpose – the focus of this article is to explore self-evaluation of performance in professional English that students have to do in university studies. It is clear that students can have various problems in learning English and make mistakes in listening, speaking, reading, writing, and vocabulary. Speaking and listening are the skills that are more common on an everyday basis than reading and writing. Speaking and listening skills have been known to be more difficult to master. English vocabulary presents another problem for language learners. At the university level, students study professional English, also called English for Specific Purposes (ESP. Students will need it for their future profession, so it is important for them to be able to evaluate their achievements in learning.Methodology/approach – the research paper adopts the qualitative research approach. The questionnaire on learner perceptions of computerized self-evaluation of various activities was administered to students of three different specializations. Students‘ perceptions of success or failure in their performance were analyzed.Findings. The results indicated that attitudes to computerized self-evaluation depended on the difficulty of tasks and chosen future specialization. The findings show that respondents of three investigated specializations encounter similar difficulties, but to a different degree. There are no specific problems in performance due to the complexity of the professional vocabulary that students must learn. The computations of Pearson’s correlations coefficients demonstrate that there are good correlational relationships within each specialization. The ratings of Psychology (PS students reveal higher mean values and lower scattering of Standard Deviations in Moodle tasks than the ratings of Internet Management and Communication (IMC students.Research limitations. The investigated samples contain the limited number of respondents, which might

  7. Evaluation of Gear Condition Indicator Performance on Rotorcraft Fleet

    Science.gov (United States)

    Antolick, Lance J.; Branning, Jeremy S.; Wade, Daniel R.; Dempsey, Paula J.

    2010-01-01

    The U.S. Army is currently expanding its fleet of Health Usage Monitoring Systems (HUMS) equipped aircraft at significant rates, to now include over 1,000 rotorcraft. Two different on-board HUMS, the Honeywell Modern Signal Processing Unit (MSPU) and the Goodrich Integrated Vehicle Health Management System (IVHMS), are collecting vibration health data on aircraft that include the Apache, Blackhawk, Chinook, and Kiowa Warrior. The objective of this paper is to recommend the most effective gear condition indicators for fleet use based on both a theoretical foundation and field data. Gear diagnostics with better performance will be recommended based on both a theoretical foundation and results of in-fleet use. In order to evaluate the gear condition indicator performance on rotorcraft fleets, results of more than five years of health monitoring for gear faults in the entire HUMS equipped Army helicopter fleet will be presented. More than ten examples of gear faults indicated by the gear CI have been compiled and each reviewed for accuracy. False alarms indications will also be discussed. Performance data from test rigs and seeded fault tests will also be presented. The results of the fleet analysis will be discussed, and a performance metric assigned to each of the competing algorithms. Gear fault diagnostic algorithms that are compliant with ADS-79A will be recommended for future use and development. The performance of gear algorithms used in the commercial units and the effectiveness of the gear CI as a fault identifier will be assessed using the criteria outlined in the standards in ADS-79A-HDBK, an Army handbook that outlines the conversion from Reliability Centered Maintenance to the On-Condition status of Condition Based Maintenance.

  8. Performance Evaluation of IPv4/IPv6 Transition Mechanisms

    Directory of Open Access Journals (Sweden)

    Adira Quintero

    2016-02-01

    Full Text Available The exhaustion of IPv4 addresses has forced the deployment of the new version of the Internet Protocol (IPv6. However, the migration to the new protocol is done gradually and with the due care for many reasons that include: cost, inclusion of support for IPv6 in existing applications, training of technical staff, lack of web content available over IPv6 from important providers, and obsolete devices not anymore supported by manufacturers. For those reasons, many transition mechanisms have been proposed, each one to fill distinct requirements, with different operational theory and availability according to the network environment. A performance evaluation of these mechanisms can help network administrators and researchers in their selection of the best transition technology for their environment. In this paper, we present a performance comparison of some transition mechanisms such as ISATAP, 6to4, and NAT64 in real testbeds with Debian, Windows 7, Windows 8, and Windows 10. For NAT64, two different tools were tested: TAYGA and Jool. We measure the OWD and the throughput for UDP and TCP for every mechanism, for both Ethernet and Fast Ethernet technologies. From this research, we can conclude that all the modern operating systems for PCs already have good support for IPv6, and a very similar network performance. Also, we can infer from our work that in controlled environments, native IPv4 has the best performance, closely followed by native IPv6. The difference is essentially due to the length of the IP header (20 bytes in IPv4 and 40 bytes in IPv6. The tunneling solutions chosen for this research (ISATAP and 6to4 have a similar performance, which is the lowest of the studied technologies, because of the additional IPv4 header in the tunnel.

  9. Performance evaluation of Samsung LABGEO(HC10) Hematology Analyzer.

    Science.gov (United States)

    Park, Il Joong; Ahn, Sunhyun; Kim, Young In; Kang, Seon Joo; Cho, Sung Ran

    2014-08-01

    The Samsung LABGEO(HC10) Hematology Analyzer (LABGEO(HC10)) is a recently developed automated hematology analyzer that uses impedance technologies. The analyzer provides 18 parameters including 3-part differential at a maximum rate of 80 samples per hour. To evaluate the performance of the LABGEO(HC10). We evaluated precision, linearity, carryover, and relationship for complete blood cell count parameters between the LABGEO(HC10) and the LH780 (Beckman Coulter Inc) in a university hospital in Korea according to the Clinical and Laboratory Standards Institute guidelines. Sample stability and differences due to the anticoagulant used (K₂EDTA versus K₃EDTA) were also evaluated. The LABGEO(HC10) showed linearity over a wide range and minimal carryover ( 0.92) except for mean corpuscular hemoglobin concentration. The bias estimated was acceptable for all parameters investigated except for monocyte count. Most parameters were stable until 24 hours both at room temperature and at 4°C. The difference by anticoagulant type was statistically insignificant for all parameters except for a few red cell parameters. The accurate results achievable and simplicity of operation make the unit recommendable for small to medium-sized laboratories.

  10. The performance profile: A multi–criteria performance evaluation method for test–based problems

    Directory of Open Access Journals (Sweden)

    Jaśkowski Wojciech

    2016-03-01

    Full Text Available In test-based problems, solutions produced by search algorithms are typically assessed using average outcomes of interactions with multiple tests. This aggregation leads to information loss, which can render different solutions apparently indifferent and hinder comparison of search algorithms. In this paper we introduce the performance profile, a generic, domain-independent, multi-criteria performance evaluation method that mitigates this problem by characterizing the performance of a solution by a vector of outcomes of interactions with tests of various difficulty. To demonstrate the usefulness of this gauge, we employ it to analyze the behavior of Othello and Iterated Prisoner’s Dilemma players produced by five (coevolutionary algorithms as well as players known from previous publications. Performance profiles reveal interesting differences between the players, which escape the attention of the scalar performance measure of the expected utility. In particular, they allow us to observe that evolution with random sampling produces players coping well against the mediocre opponents, while the coevolutionary and temporal difference learning strategies play better against the high-grade opponents. We postulate that performance profiles improve our understanding of characteristics of search algorithms applied to arbitrary test-based problems, and can prospectively help design better methods for interactive domains.

  11. Safety performance evaluation using proactive indicators in a selected industry

    Directory of Open Access Journals (Sweden)

    Abolfazl Barkhordari

    2015-03-01

    Full Text Available Background & Objectives: Quality and effectiveness of safety systems are critical factors in achieving their goals. This study was aimed to represent a method for performance evaluation of safety systems by proactive indicators using different updated models in the field of safety which will be tested in a selected industry. Methods: This study is a cross-sectional study. Proactive indicators used in this study were: Unsafe acts rate, Safety Climate, Accident Proneness, and Near-miss incident rate. The number of in 1473 safety climate questionnaires and 543 Accident Proneness questionnaires was completed. Results: The minimum and maximum safety climate score were 56.88 and 58.2, respectively, and the minimum and maximum scores of Accident Proneness were 98.2 and 140.7, respectively. The maximum number of Near-miss incident rate were 408 and the minimum of that was 196. The maximum number of unsafe acts rate was 43.8 percent and the minimum of that was 27.2 percent. In nine dimensions of Safety climate the eighth dimension (personal perception of risk with the score of 4.07 has the lowest score and the fourth (laws and safety regulations dimension with 8.05 has the highest score. According to expert opinions, the most important indicator in the assessment of safety performance was unsafe acts rate, while near-miss incident rate was the least important one. Conclusion: The results of this survey reveal that using proactive (Prospective indicators could be an appropriate method in organizations safety performance evaluation.

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

    Science.gov (United States)

    Ehrenberg, Livnat; Gannot (Eurasipmember), Sharon; Shayevitz, Ofer; Leshem, Amir; Zehavi, Ephraim

    2010-12-01

    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.

  13. 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.

  14. Evaluating the effectiveness of training strategies: performance goals and testing.

    Science.gov (United States)

    Foshay, Wellesley R; Tinkey, Peggy T

    2007-01-01

    The Public Health Service policy, Animal Welfare Act regulations, and the Guide for the Care and Use of Laboratory Animals all require that institutions provide training for personnel engaged in animal research. Most research facilities have developed training programs to meet these requirements but may not have developed ways of assessing the effectiveness of these programs. Omission of this critical activity often leads to training that is ineffective, inefficient, or unnecessary. Evaluating the effectiveness of biomedical research and animal care training should involve a combination of assessments of performance, competence and knowledge, and appropriate tests for each type of knowledge, used at appropriate time intervals. In this article, the hierarchical relationship between performance, competence, and knowledge is described. The discussion of cognitive and psychomotor knowledge includes the important distinction between declarative and procedural knowledge. Measurement of performance is described and can include a variety of indirect and direct measurement techniques. Each measurement option has its own profile of strengths and weaknesses in terms of measurement validity, reliability, and costs of development and delivery. It is important to understand the tradeoffs associated with each measurement option, and to make appropriate choices of measurement strategy based on these tradeoffs arrayed against considerations of frequency, criticality, difficulty of learning, logistics, and budget. The article concludes with an example of how these measurement strategies can be combined into a cost-effective assessment plan for a biomedical research facility.

  15. Development and Performance Evaluation of Maize Threshing and Grinding Machine

    Directory of Open Access Journals (Sweden)

    Ugwu K. C.

    2016-10-01

    Full Text Available The Maize threshing and grinding machine was designed, fabricated and its performance was evaluated. The machine consists of two compartments which include the threshing and grinding chamber. Threshing chamber is where the maize grain is been separated from the cob, and the cob will be collected through the outlet chute. Therefore, before the maize grain enters into the grinding chamber, blower will separate the grain from the chaff. The separated grain enters the grinding chamber and is being grounded by compressive means through the stationary disc and the grinding plate. A 2 hp electric motor provides drive through belt connections to drive the pulley on threshing chamber and another 2 hp electric motor provide drive for the grinding chamber. The actual test was conducted using three different moisture contents and feed rates. It was observed that the efficiency of the machine was hindered by high moisture content. The results obtained showed that the machine performed well at low moisture content. The efficiency of the machine was 99.01% on the moisture content of 10%. The analysis of variance (ANOVA of the results obtained at 5% percent probability confirmed that the moisture content of the maize was an important parameter that affects the performance of the machine

  16. Performance evaluation and improvement directions for an Indian electric utility

    Energy Technology Data Exchange (ETDEWEB)

    Yadav, Vinod Kumar, E-mail: vinod@gbu.ac.in [Electrical Engineering Department, Gautam Buddha University, Greater Noida 201310 (India); Padhy, N.P.; Gupta, H.O. [Electrical Engineering Department, Indian Institute of Technology, Roorkee 247667 (India)

    2011-11-15

    This study evaluates the performance of 29 Electricity Distribution Divisions (EDDs) of an Indian state - Uttarakhand - deploying Input oriented Data Envelopment Analysis (DEA). The results indicate that the performance of several EDDs is sub-optimal, suggesting the potential for cost reductions and possible reduction in employees number. In the DEA method more than one unit are identified as efficient. Therefore, this study suggests a method for ranking the efficient units by their importance as benchmarks for the inefficient units through benchmark share measure. The bigger the benchmark share, the more important an efficient division is in benchmarking for inefficient ones. Result reveals that plain area divisions are relatively efficient and have higher potential to influence the performance of inefficient EDDs. This study is envisaged to be instrumental to policy makers and managers to increase the operational efficiency of inefficient EDDs and thereby increase the competitiveness in the face of restructuring and liberalization of Indian electricity sector. - Highlights: > Plain area divisions are more effective in integrating resources than hilly divisions. > For prevalent inefficiency two models are developed to varying environmental conditions. > Benchmark share identifies the variable that is influential in increasing the efficiency. > Savings in terms of reduction in O and M cost and number of Employees. > Findings of research work redefine the view point of the utility planners.

  17. Evaluation of Performance and Uncertainty of Infrared Tympanic Thermometers

    Directory of Open Access Journals (Sweden)

    Wenbin Chung

    2010-03-01

    Full Text Available Infrared tympanic thermometers (ITTs are easy to use and have a quick response time. They are widely used for temperature measurement of the human body. The accuracy and uncertainty of measurement is the importance performance indicator for these meters. The performance of two infrared tympanic thermometers, Braun THT-3020 and OMRON MC-510, were evaluated in this study. The cell of a temperature calibrator was modified to serve as the standard temperature of the blackbody. The errors of measurement for the two meters were reduced by the calibration equation. The predictive values could meet the requirements of the ASTM standard. The sources of uncertainty include the standard deviations of replication at fixed temperature or the predicted values of calibration equation, reference standard values and resolution. The uncertainty analysis shows that the uncertainty of calibration equation is the main source for combined uncertainty. Ambient temperature did not have the significant effects on the measured performance. The calibration equations could improve the accuracy of ITTs. However, these equations did not improve the uncertainty of ITTs.

  18. Performance Evaluation of IP Based Multimedia Services in UMTS

    Directory of Open Access Journals (Sweden)

    Riri Fitri SARI

    2008-01-01

    Full Text Available This paper presents our work in the performance evaluation of UMTS network based on simulation. Enhanced UMTS Radio Access Network Extensions for NS-2 (EURANE developed by SEACORN has brought us to the higher phase of UMTS simulation in third generation wireless telecommunication system. Wireless 3G is designed to be able to deliver various kind of multimedia package through an IP network for the purpose of easier interconnection with fixed network with various existing multimedia services. Multimedia services with their bandwidth consumption characteristics are able to be sent through a UMTS network with the existence of High Speed Data Packet Access (HSPDA in Release 5. Quality of Service (QoS is a major concern in multimedia services. This paper shows the performance analysis of a number of multimedia services and their QoS using HSDPA in UMTS. The experiments were based on EURANE extension for NS-2. From the simulation conducted, we found that Unacknowledged Mode (UM in Radio Link Control (RLC will perform better for QoS class number 1 (VoIP and 2 (Video Streaming, while Acknowledged Mode (AM mode are more suitable for QoS class number 3 (web server and 4 (FTP.

  19. Performance Evaluation of SCM-WDM System Using Different Linecoding

    CERN Document Server

    Reza, Md Shamim; Chowdhury, Adnan Ahmed; Reza, S M Shamim; Rahman, Md Moshiur

    2010-01-01

    This paper investigates the theoretical performance analysis for a subcarrier multiplexed (SCM) wavelength division multiplexing (WDM) optical transmission system in presence of optical beat interference (OBI) which occurs during the photo detection process. We have presented a comparison for improving the performance of SCM-WDM system in presence of OBI. Non-return-to zero (NRZ), Manchester and Miller code (MC) line coding are used for performance investigation of SCM-WDM system. A suitable signal bandwidth is selected and 200 KHz is considered as channel bandwidth. Power spectrum of signal and cross component for those line coding are analyzed. Comparison results are evaluated in terms of signal to OBI ratio for the three linecoding schemes which is called signal to interference ratio (SIR). It is found that there is a significant increase in the SIR by employing Miller code compared to NRZ and Manchester for the same data rate. For example, for a number of subcarriers of 10, the achievable SIR is about -24...

  20. Performance evaluation of indirect evaporative cooler using clay pot

    Science.gov (United States)

    Ramkumar, R.; Ragupathy, A.

    2016-05-01

    The aim of the experimental study is to investigate the performance of indirect evaporator cooler in hot and humid regions. A novel approach is implemented in the cooler using clay pot with different position (single, double and three pots) and different orientation as aligned and staggered position for potential and feasibility study. The clay pot is the ceramic material where the water filled inside the pot and due to the property of porosity, the water comes outer surface of the pot and contact with the air passing over the pot surface and air get cooled. A test rig was designed and fabricated to collect experimental data. The clay pots were arranged in aligned and staggered position. In our study heat transfer was analysed with various air velocity of 1m/s to 5m/s. The air temperature, relative humidity, pressure drop and effectiveness were measured and the performance of the evaporative cooler was evaluated. The analysis of the data indicated that cooling effectiveness improve with decrease of air velocity at staggered position. It was shown that staggered position has the higher performance (57%) at 1 m/s air velocity comparison with aligned position values at three pots position.

  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. FHSS DSSS And Hybrid DSFH Performance Evaluation For VSAT

    Directory of Open Access Journals (Sweden)

    Lina E. Alatabani

    2015-08-01

    Full Text Available Abstract The performance of any radio communication system is affected by several factors such as interference and jamming caused by some other parallel networks for the purpose of decreasing the performance of a given system. Direct Sequence Spread Spectrum DSSS Frequency Hopping Spread Spectrum FHSS and a hybrid approach of both techniques DSFH are proposed to solve the problem. Whereas DSSS generates a sequence of bit and sends them over a fixed data rate and spread the spectrum with a spreading sequence FHSS send the data into different channels with variable data rates and the hybrid DSFH approach takes advantage of DSSS and uses it in multiple channels. Various modulation techniques which are suitable for Very small aperture terminal VSAT were simulated with each of the mentioned approaches such as Phase Ship Keying PSK Frequency Shift Keying FSK and Quadrature Amplitude Modulation QAM to in order to work properly with each technique. The performance of each approach was evaluated in terms of Signal to Noise Ratio vs Bit Error Rate throughput delay and datarate. The results are very close to each other in terms of BER but the best approach was the DSSS. The Hybrid DSFH needs more power to operate so it best fits the applications with high frequencies. The Hybrid DSFH approach was the best of the three tested approaches in terms of throughput delay and datarate. The FHSS technique was average in all the parameters and had greater delay time due to the delay gap in the hopping process.

  3. Improvability of assembly systems I: Problem formulation and performance evaluation

    Directory of Open Access Journals (Sweden)

    Chiang S.-Y.

    2000-01-01

    Full Text Available This work develops improvability theory for assembly systems. It consists of two parts.Part I includes the problem formulation and the analysis technique. Part II presents the so-called improvability indicators and a case study. Improvability theory addresses the questions of improving performance in production systems with unreliable machines. We consider both constrained and unconstrained improvability. In the constrained case, the problem consists of determining if there exists a re-distribution of resources (inventory and workforce, which leads to an increase in the system's production rate. In the unconstrained case, the problem consists of identifying a machine and a buffer, which impede the system performance in the strongest manner. The investigation of the improvability properties requires an expression for the system performance measures as functions of the machine and buffer parameters. This paper presents a method for evaluating these functions and illustrates their practical utility using a case study at an automotive components plant. Part II uses the method developed here to establish conditions of improvability and to describe additional results of the case study.

  4. A Methodological Comparison between Energy and Environmental Performance Evaluation

    Directory of Open Access Journals (Sweden)

    Francesca Pagliaro

    2015-07-01

    Full Text Available The European Union is working on strategies in order to increase the energy efficiency of buildings. A useful solution is to identify the energy performance of buildings through the Energy Performance Certificate (EPC, as it provides information for the comparison of buildings with different architectural typology, shape, design technology and geographic location. However, this tool does not assess the real energy consumption of the building and does not always take into account its impact on the environment. In this work, two different types of analysis were carried out: one based only on the energy efficiency and the other one based on the environmental impact. Those analyses were applied on a standard building, set in three different Italian locations, with the purpose of obtaining cross-related information. After the evaluation of the results, interventions on some parameters (walls insulation, windows frame, filler gas in the insulated glazing have been identified in order to improve the energy behavior of the building with an acceptable environmental impact. The aim of this paper is to propose a methodology that integrates the EPC with green building rating systems, leading to a more conscious choice of retrofit interventions as a compromise between energy performances and environmental impact.

  5. 78 FR 41926 - Proposed Information Collection Request; Comment Request; Performance Evaluation Studies on...

    Science.gov (United States)

    2013-07-12

    ... AGENCY Proposed Information Collection Request; Comment Request; Performance Evaluation Studies on... an information collection request (ICR), ``Performance Evaluation Studies on Wastewater Laboratories...: (i) Evaluate whether the proposed collection of information is necessary for the proper...

  6. Manipulator Performance Evaluation Using Fitts' Taping Task

    Energy Technology Data Exchange (ETDEWEB)

    Draper, J.V.; Jared, B.C.; Noakes, M.W.

    1999-04-25

    Metaphorically, a teleoperator with master controllers projects the user's arms and hands into a re- mote area, Therefore, human users interact with teleoperators at a more fundamental level than they do with most human-machine systems. Instead of inputting decisions about how the system should func- tion, teleoperator users input the movements they might make if they were truly in the remote area and the remote machine must recreate their trajectories and impedance. This intense human-machine inter- action requires displays and controls more carefully attuned to human motor capabilities than is neces- sary with most systems. It is important for teleoperated manipulators to be able to recreate human trajectories and impedance in real time. One method for assessing manipulator performance is to observe how well a system be- haves while a human user completes human dexterity tasks with it. Fitts' tapping task has been, used many times in the past for this purpose. This report describes such a performance assessment. The International Submarine Engineering (ISE) Autonomous/Teleoperated Operations Manipulator (ATOM) servomanipulator system was evalu- ated using a generic positioning accuracy task. The task is a simple one but has the merits of (1) pro- ducing a performance function estimate rather than a point estimate and (2) being widely used in the past for human and servomanipulator dexterity tests. Results of testing using this task may, therefore, allow comparison with other manipulators, and is generically representative of a broad class of tasks. Results of the testing indicate that the ATOM manipulator is capable of performing the task. Force reflection had a negative impact on task efficiency in these data. This was most likely caused by the high resistance to movement the master controller exhibited with the force reflection engaged. Measurements of exerted forces were not made, so it is not possible to say whether the force reflection helped

  7. Performance evaluation of PFBR wire type sodium leak detectors

    Energy Technology Data Exchange (ETDEWEB)

    Vijayakumar, G., E-mail: viju@igcar.gov.in [Fast Reactor Technology Group, Indira Gandhi Centre for Atomic Research, Kalpakkam 603102 (India); Rajan, K.K.; Nashine, B.K.; Chandramouli, S. [Fast Reactor Technology Group, Indira Gandhi Centre for Atomic Research, Kalpakkam 603102 (India); Madhusoodanan, K. [Reactor Engineering Group, Indira Gandhi Centre for Atomic Research, Kalpakkam 603102 (India); Kalyanasundaram, P. [Fast Reactor Technology Group, Indira Gandhi Centre for Atomic Research, Kalpakkam 603102 (India)

    2011-06-15

    Highlights: > Performance evaluation of wire type leak detectors was conducted in LEENA facility by creating sodium leaks. > The lowest leak rate of 214 g/h was detected in 50 min and the highest detection time was 6 h for a leak rate of 222 g/h. > Factors affecting the leak detection time are packing density of thermal insulation, layout of heater, temperature, etc. > Relationship between leak rate and detection time was established and a leak rate of 100 g/h is likely to be detected in 11.1 h. > Contact resistance of leaked sodium increased to 3.5 kilo ohms in 20 h. - Abstract: Wire type leak detectors working on conductivity principle are used for detecting sodium leak in the secondary sodium circuits of fast breeder reactors. It is required to assess the performance of these detectors and confirm that they are meeting the requirements. A test facility by name LEENA was constructed at Indira Gandhi Centre for Atomic Research (IGCAR), Kalpakkam to test the wire type leak detector lay out by simulating different sodium leak rates. This test facility consists of a sodium dump tank, a test vessel, interconnecting pipelines with valves, micro filter and test section with leak simulators. There are three different test sections in the test set up of length 1000 mm each. These test sections simulate piping of Prototype Fast Breeder Reactor (PFBR) secondary circuit and the wire type leak detector layout in full scale. All test sections are provided with leak simulators. A leak simulator consists of a hole of size one mm drilled in the test section and closed with a tapered pin. The tapered pin position in the hole is adjusted by a screw mechanism and there by the annular gap of flow area is varied for getting different leak rates. Various experiments were conducted to evaluate the performance of the leak detectors by creating different sodium leak rates. This paper deals with the details of wire type leak detector layout for the secondary sodium circuit of PFBR

  8. Comprehensive evaluation of imputation performance in African Americans.

    Science.gov (United States)

    Chanda, Pritam; Yuhki, Naoya; Li, Man; Bader, Joel S; Hartz, Alex; Boerwinkle, Eric; Kao, W H Linda; Arking, Dan E

    2012-07-01

    Imputation of genome-wide single-nucleotide polymorphism (SNP) arrays to a larger known reference panel of SNPs has become a standard and an essential part of genome-wide association studies. However, little is known about the behavior of imputation in African Americans with respect to the different imputation algorithms, the reference population(s) and the reference SNP panels used. Genome-wide SNP data (Affymetrix 6.0) from 3207 African American samples in the Atherosclerosis Risk in Communities Study (ARIC) was used to systematically evaluate imputation quality and yield. Imputation was performed with the imputation algorithms MACH, IMPUTE and BEAGLE using several combinations of three reference panels of HapMap III (ASW, YRI and CEU) and 1000 Genomes Project (pilot 1 YRI June 2010 release, EUR and AFR August 2010 and June 2011 releases) panels with SNP data on chromosomes 18, 20 and 22. About 10% of the directly genotyped SNPs from each chromosome were masked, and SNPs common between the reference panels were used for evaluating the imputation quality using two statistical metrics-concordance accuracy and Cohen's kappa (κ) coefficient. The dependencies of these metrics on the minor allele frequencies (MAF) and specific genotype categories (minor allele homozygotes, heterozygotes and major allele homozygotes) were thoroughly investigated to determine the best panel and method for imputation in African Americans. In addition, the power to detect imputed SNPs associated with simulated phenotypes was studied using the mean genotype of each masked SNP in the imputed data. Our results indicate that the genotype concordances after stratification into each genotype category and Cohen's κ coefficient are considerably better equipped to differentiate imputation performance compared with the traditionally used total concordance statistic, and both statistics improved with increasing MAF irrespective of the imputation method. We also find that both MACH and IMPUTE

  9. Performance Evaluation of L3 Handover Latency in MIPv6

    Directory of Open Access Journals (Sweden)

    D.Kavitha,

    2011-06-01

    Full Text Available Recent years in the field of mobile communications have brought two significant requirements – seamless service delivery and Quality of Service provisioning. Seamless mobility goes hand in hand withMobile IPv6 protocol and various handover schemes of this protocol are trying to solve the QoS issue. In this paper we are presenting a method for evaluation of the Layer 3 handover schemes from the handover latency point of view. A L3 handover procedure can be divided into four phases: Movement Detection, CoA Configuration, Home agent Registration and Route Optimization. We simulated the proposed protocol certificate based on Demand Approach in Route Optimization phase and compared it with the return routability procedure in Route Optimization phase of MIPv6 handover. The latencies in different handover phases have been measured in an operated wireless LAN (WLAN in order to determine the performance bottleneck of handover.

  10. Performance evaluation and ranking of mutual investment funds

    Directory of Open Access Journals (Sweden)

    Behzad Zamanian Samarin

    2016-06-01

    Full Text Available This study aims to compare performance of active investment funds in Tehran Stock Exchange based on Sorting ratio considered as one of the post-modern ratios of portfolio evaluation. For this purpose, relevant data to 24 active investment funds in Iran during 2011-2013 were studied. First, parameters of return on portfolio return on investor authority, semi-variance of fund toward authority return was calculated, and ranking was conducted using mentioned ratio. At the end, significance of hypotheses was studied using Durbin-Watson test. According to the obtained results, it was determined that Sina Mutual Investment Fund had the highest rank among 24 funds and Omit Investment Fund had the lowest rank based on Sorting ratio.

  11. Performance Evaluation of 3d Modeling Software for Uav Photogrammetry

    Science.gov (United States)

    Yanagi, H.; Chikatsu, H.

    2016-06-01

    UAV (Unmanned Aerial Vehicle) photogrammetry, which combines UAV and freely available internet-based 3D modeling software, is widely used as a low-cost and user-friendly photogrammetry technique in the fields such as remote sensing and geosciences. In UAV photogrammetry, only the platform used in conventional aerial photogrammetry is changed. Consequently, 3D modeling software contributes significantly to its expansion. However, the algorithms of the 3D modelling software are black box algorithms. As a result, only a few studies have been able to evaluate their accuracy using 3D coordinate check points. With this motive, Smart3DCapture and Pix4Dmapper were downloaded from the Internet and commercial software PhotoScan was also employed; investigations were performed in this paper using check points and images obtained from UAV.

  12. Random Graphs for Performance Evaluation of Recommender Systems

    CERN Document Server

    Chojnacki, Szymon

    2010-01-01

    The purpose of this article is to introduce a new analytical framework dedicated to measuring performance of recommender systems. The standard approach is to assess the quality of a system by means of accuracy related statistics. However, the specificity of the environments in which recommender systems are deployed requires to pay much attention to speed and memory requirements of the algorithms. Unfortunately, it is implausible to assess accurately the complexity of various algorithms with formal tools. This can be attributed to the fact that such analyses are usually based on an assumption of dense representation of underlying data structures. Whereas, in real life the algorithms operate on sparse data and are implemented with collections dedicated for them. Therefore, we propose to measure the complexity of recommender systems with artificial datasets that posses real-life properties. We utilize recently developed bipartite graph generator to evaluate how state-of-the-art recommender systems' behavior is d...

  13. Performance evaluation of CFRP-rubber shock absorbers

    Energy Technology Data Exchange (ETDEWEB)

    Lamanna, Giuseppe, E-mail: giuseppe.lamanna@unina2.it; Sepe, Raffaele, E-mail: giuseppe.lamanna@unina2.it [Department of Industrial and Information Engineering, Second University of Naples, via Roma, 29 - 81031 Aversa (Italy)

    2014-05-15

    In the present work a numerical investigation on the energy absorbing capability of dedicated structural components made of a carbon fiber reinforced polymer and an emulsion polymerised styrene butadiene rubber is reported. The shock absorbers are devices designed to absorb large amounts of energy by sacrificing their own structural integrity. Their aim is to cushion the effects of an impact phenomenon with the intent to preserve other structures from global failure or local damaging. Another important role of shock absorbers is reducing the peak of the acceleration showed during an impact phenomenon. This effect is of considerable interest in the case of vehicles to preserve passengers’ safety. Static and dynamic numerical results are compared with experimental ones in terms of mean crushing forces, energy and peak crushing. The global performance of the absorbers has been evaluated by referencing to a proposed quality index.

  14. On Performance Evaluation of a New Liquid Propellant

    Directory of Open Access Journals (Sweden)

    S. P. Panda

    1986-01-01

    Full Text Available A blend of 3-carene and cardanol in 70:30 weight proportion exhibits synergistic hypergolic ignition with red fuming nitric acid (RFNA as oxidizer. Attempts have been made to evaluate this new propellant by theoretical calculationof performance parameters and verification of the results by static firing of a 10 kg thrust rocket motor around 20 atmosphers of chamber pressure. At an oxidizer-to-fuel weight ratio (O/F of 3.34 (RFNA used had 21% N204 and 5% by weight of concentrated sulphuric acid as catalyst, the propellant produced a reasonably smooth pressure-time curve with an ignition delay of 35 milliseconds. The theoretical characteristic velocity value matched well with the experimental. No carbon residue was left in the rocket motor after firing. Specific impulse (theoretical of the propellant has been found to be 223.8 seconds at chamber pressure, 20 atmos and exist pressure, 1 atmos.

  15. Sustainable Supplier Performance Evaluation and Selection with Neofuzzy TOPSIS Method.

    Science.gov (United States)

    Chaharsooghi, S K; Ashrafi, Mehdi

    2014-01-01

    Supplier selection plays an important role in the supply chain management and traditional criteria such as price, quality, and flexibility are considered for supplier performance evaluation in researches. In recent years sustainability has received more attention in the supply chain management literature with triple bottom line (TBL) describing the sustainability in supply chain management with social, environmental, and economic initiatives. This paper explores sustainability in supply chain management and examines the problem of identifying a new model for supplier selection based on extended model of TBL approach in supply chain by presenting fuzzy multicriteria method. Linguistic values of experts' subjective preferences are expressed with fuzzy numbers and Neofuzzy TOPSIS is proposed for finding the best solution of supplier selection problem. Numerical results show that the proposed model is efficient for integrating sustainability in supplier selection problem. The importance of using complimentary aspects of sustainability and Neofuzzy TOPSIS concept in sustainable supplier selection process is shown with sensitivity analysis.

  16. Behavioral Simulation and Performance Evaluation of Multi-Processor Architectures

    Directory of Open Access Journals (Sweden)

    Ausif Mahmood

    1996-01-01

    Full Text Available The development of multi-processor architectures requires extensive behavioral simulations to verify the correctness of design and to evaluate its performance. A high level language can provide maximum flexibility in this respect if the constructs for handling concurrent processes and a time mapping mechanism are added. This paper describes a novel technique for emulating hardware processes involved in a parallel architecture such that an object-oriented description of the design is maintained. The communication and synchronization between hardware processes is handled by splitting the processes into their equivalent subprograms at the entry points. The proper scheduling of these subprograms is coordinated by a timing wheel which provides a time mapping mechanism. Finally, a high level language pre-processor is proposed so that the timing wheel and the process emulation details can be made transparent to the user.

  17. Evaluation of GPS/BDS indoor positioning performance and enhancement

    DEFF Research Database (Denmark)

    He, Zhe; Petovello, Mark; Pei, Ling;

    2017-01-01

    This paper assesses the potential of using BDS and GPS signals to position in challenged environments such as indoors. Traditional assisted GNSS approaches that use code phase as measurements (i.e., coarse-time solutions) are shown to be prone to multipath and noise. An enhanced approach that has...... superior sensitivity and positioning performance—the so-called direct positioning receiver architecture—has been implemented and evaluated using live indoor BDS and/or GPS signals. Real indoor experiments have been conducted in Shanghai and significant improvement has been observed with enhanced approaches......: results with BDS constellation show better horizontal positioning performance (biases are less than 10m) than using GPS alone, but are slightly worse in the vertical axis; when using the enhanced approach with BDS and GPS, both horizontal and vertical axes show promising results for the environments...

  18. Performance Evaluation of Concrete using Marble Mining Waste

    Science.gov (United States)

    Kore, Sudarshan Dattatraya; Vyas, A. K.

    2016-12-01

    A huge amount waste (approximately 60%) is generated during mining and processing in marble industries. Such waste can be best utilized in infrastructure development works. Coarse aggregate 75% by weight was replaced by aggregate obtained from marble mining waste. The impact of marble waste as a partial replacement for conventional coarse aggregate on the properties of concrete mixes such as workability, compressive strength, permeability, abrasion, etc. was evaluated. The test results revealed that the compressive strength was comparable to that of control concrete. Other properties such as workability of concrete increased, water absorption reduced by 17%, and resistance to abrasion was marginally increased by 2% as compared to that of control concrete. Ultrasonic pulse velocity and FTIR results show improvement in quality of concrete with crushed marble waste. From the TGA analysis it was confirmed that, aggregate produced from marble waste shows better performance under elevated temperature than that of conventional aggregates.

  19. Performance Evaluation of OWC Using Different Modulation Techniques

    Science.gov (United States)

    Goyal, Heena; Saxena, Jyoti; Dewra, Sanjeev

    2016-12-01

    In this paper, performance of an optical wireless communication (OWC) channel has been investigated using different modulation techniques such as phase shift keying (PSK), differential PSK (DPSK) and optical quadrature PSK (OQPSK). This investigation has been compared at a bit rate of 20 Gbps. The results are evaluated in terms of quality (Q) factor and bit error rate (BER) using different modulation techniques. It is observed that by using PSK modulation technique, the signal can travel up to 70 km transmission distance with acceptable BER of 3.48×10-12 and Q factor of 6.93. It is also observed that by using DPSK and OQPSK, system covers transmission distance of 80 and 90 km with acceptable values of Q factor of 6.59, 6.02 and BER of 2.34×10-11, 1.46×10-10, respectively.

  20. Evaluating thermal performance of a single slope solar still

    Science.gov (United States)

    Badran, Omar O.; Abu-Khader, Mazen M.

    2007-08-01

    The distillation is one of the important methods of getting clean water from brackish and sea water using the free energy supply from the sun. An experimental work is conducted on a single slope solar still. The thermal performance of the single slope solar still is examined and evaluated through implementing the following effective parameters: (a) different insulation thicknesses of 1, 2.5 and 5 cm; (b) water depth of 2 and 3.5 cm; (c) solar intensity; (d) Overall heat loss coefficient (e) effective absorbtivity and transmissivity; and (f) ambient, water and vapor temperatures. Different effective parameters should be taken into account to increase the still productivity. A mathematical model is presented and compared with experimental results. The model gives a good match with experimental values.