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Articles 1 - 6 of 6
Full-Text Articles in Social and Behavioral Sciences
Optimization Of Frt Active Power Performance Of A Dfig During Transient Grid Faults, L Meegahapola, Damian Flynn, Tim Littler
Optimization Of Frt Active Power Performance Of A Dfig During Transient Grid Faults, L Meegahapola, Damian Flynn, Tim Littler
Dr Lasantha G Meegahapola
Optimal fault ride-through (FRT) conditions for a doubly-fed induction generator (DFIG) during a transient grid fault are analyzed with special emphasis on improving the active power generation profile. The transition states due to crowbar activation during transient faults are investigated to exploit the maximum power during the fault and post-fault period. It has been identified that operating slip, severity of fault and crowbar resistance have a direct impact on the power capability of a DFIG, and crowbar resistance can be chosen to optimize the power capability. It has been further shown that an extended crowbar period can deliver enhanced inertial …
Performance Comparison Of Two Compact Multiplexed Readouts With Sensl's Spmarray4 For High-Resolution Detector Module, Yujin Qi, Xiaohui Zhang, Cuilan Zhao, Lihong Chen, Marco Petasecca, Mitra Safavi-Naeini, Michael Lerch, Anatoly Rosenfeld
Performance Comparison Of Two Compact Multiplexed Readouts With Sensl's Spmarray4 For High-Resolution Detector Module, Yujin Qi, Xiaohui Zhang, Cuilan Zhao, Lihong Chen, Marco Petasecca, Mitra Safavi-Naeini, Michael Lerch, Anatoly Rosenfeld
Michael L.F. Lerch
The purpose of this study was to investigate a compact readout for silicon photomultiplier (SiPM) array in the development of high-resolution imaging detector to reduce the readout channels while maximizing the detectors performance. The detector module was composed of a LYSO scintillation crystal array and a SensL's SPMArray4. The crystal array was coupled to the SiPM array with a 2mm-thick silicone pad to improve the light sharing among the SiPM array elements. Three LYSO crystal arrays of 4x4, 8x8 and 12x12 crystal elements with pixel sizes of 3.2, 1.6 and 1.0 mm were investigated in this study. Two compact multiplexed …
Effects Of The Entrepreneurial And Managerial Orientations Of Owner-Managers On Company Performance: An Empirical Test In Sri Lanka, Anura De Zoysa, Palli Mulla K A Chandrakumara, Athula Manawaduge
Effects Of The Entrepreneurial And Managerial Orientations Of Owner-Managers On Company Performance: An Empirical Test In Sri Lanka, Anura De Zoysa, Palli Mulla K A Chandrakumara, Athula Manawaduge
Anil Chandrakumara
In this paper we have made strong distinction between managerial and entrepreneurial orientations of leadership and argued that these orientations should have different effects on the performance of companies. Data were collected from a sample of 204 owner-managers of Sri Lankan companies by administering a mailed paper questionnaire. Company performance was measured by the ratings of sales performance on the part of managers concerned. Correlation and regression analysis were then performed in the impact analysis. Our findings indicate that the leadership orientation of owner-managers of small firms is more entrepreneurial than managerial. Also, entrepreneurial orientation (EO) correlated more significantly with …
Capital Structure And Firm Performance In Emerging Economies: An Empirical Analysis Of Sri Lankan Firms, Anura De Zoysa, Muhammad Chowdhury, Palli Mulla K A Chandrakumara, Athula Manawaduge
Capital Structure And Firm Performance In Emerging Economies: An Empirical Analysis Of Sri Lankan Firms, Anura De Zoysa, Muhammad Chowdhury, Palli Mulla K A Chandrakumara, Athula Manawaduge
Anil Chandrakumara
This paper offers an empirical analysis of the impact of capital structure on firm performance in thecontext of an emerging marketÿSri Lanka. The study applies both pooled and panel data regressionmodels for a sample of 155 Sri Lankan-listed firms. The results demonstrate that most of the SriLankan firms finance their operations with short-term debt capital as against the long-term debtcapital and provide strong evidence that the firm performance is negatively affected by the use of debtcapital. The study also finds a significant negative relationship between tangibility and performanceindicating inefficient utilization of non-current assets. The negative performance implicationsassociated with over-utilization of …
Age-Related Changes In Conventional Road Versus Off-Road Triathlon Performance, Romuald Lepers, Paul Stapley
Age-Related Changes In Conventional Road Versus Off-Road Triathlon Performance, Romuald Lepers, Paul Stapley
Dr Paul J Stapley
The aims of this study were: (i) to analyze agerelated declines in swimming, cycling, and running performances for road-based and off-road triathlons, and (ii) to compare age-related changes in these three disciplines between road-based and off-road triathlons. Swimming, cycling, running and total time performances of the top five males between 20 and 70 years of age (in 5-year intervals) were analyzed for short distance road-based (1.5 km swim, 40 km cycle, and 10 km run) and off-road (1.5 km swim, 30 km mountain bike, and 11 km trail run) triathlons at the 2009 World Championships. Independently of age, there was …
Differences In Gender And Performance In Off-Road Triathlon, Romuald Lepers, Paul Stapley
Differences In Gender And Performance In Off-Road Triathlon, Romuald Lepers, Paul Stapley
Dr Paul J Stapley
The aims of this study were: (1) to examine performance trends and compare elite male and female athletes at the off-road triathlon (1.5-km swim, 30-km mountain biking, and 11-km trail running) world championships since its inception in 1996, and (2) to compare gender-related differences between off-road triathlon and conventional road-based triathlon. Linear regression analyses and ANOVA were used to examine performance trends and differences between the sexes. Elite male performance times stabilized over the 2005-2009 period, whereas elite female performance times continued to improve, especially for the run leg. Differences in performance times between the sexes were less marked in …