The Experts below are selected from a list of 730935 Experts worldwide ranked by ideXlab platform
Qi Hong - One of the best experts on this subject based on the ideXlab platform.
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An O-plate compensated in-plane switching liquid crystal display
IEEE\ OSA Journal of Display Technology, 2006Co-Authors: Qi HongAbstract:Pretilt angle effect on the dark-state light Leakage and viewing angle of in-plane switching (IPS) liquid crystal display is investigated. As the liquid crystal (LC) pretilt angle increases, the light Leakage becomes more severe and the off-axis light Leakage from the out-of-plane LC directors cannot be neglected. Introducing an oblique compensation plate (O-plate) reduces the off-axis light Leakages from the crossed linear polarizers and the anisotropic LC media simultaneously which, in turn, improves the viewing angle of the IPS LCD
Hong Koo Baik - One of the best experts on this subject based on the ideXlab platform.
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Optimisation of alignment materials for minimising residual retardation in in-plane switching liquid crystal display
Liquid Crystals, 2016Co-Authors: Lee Tae Rim, Seung Hee Lee, Jin Ho Kim, Myung Chul Jun, Hong Koo BaikAbstract:ABSTRACTThe light Leakage in a black state of in-plane switching (IPS) liquid crystal display (LCD) associated with rubbing process has been investigated. The mechanical rubbing process with a cloth caused orientation disorders in the liquid crystal directors and these partial orientation disorders result in residual retardations of the IPS LCD, causing the light Leakages at the black state. In this study, we theoretically estimated how the light Leakage is associated with the rubbing uniformity using 2 × 2 Jones matrix equation and also experimentally confirmed how it is associated with structural properties of the alignment layer. The light Leakage was clearly reduced in the alignment layer with reduced crystallinity and flexibility.
Kishor D. Kulat - One of the best experts on this subject based on the ideXlab platform.
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A Selective Literature Review on Leak Management Techniques for Water Distribution System
Water Resources Management, 2018Co-Authors: Aditya Gupta, Kishor D. KulatAbstract:Water Distribution System suffers from Leakages causing social and economic costs. There is need of platform to manage water distribution system more efficiently by detecting, localizing and controlling the Leakages even before or as soon as they occur, ensuring quality water services to the consumers. Since last two decades, high efforts have been made by researchers for the development of efficient Leakage management techniques for reduction of water losses in distribution system. This paper provides a comprehensive analysis on Leakage management techniques covering three aspects: Leakage assessment, Leakage detection and Leakage control, with an objective to identify present challenges and future scope in their respected field. Role of smart water technologies for efficient Leakages management in pipeline network is also examined and discussed. Conclusion is drawn regarding current Leakage management techniques and proposals for future work and existing challenges are also outlined.
Aditya Gupta - One of the best experts on this subject based on the ideXlab platform.
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A Selective Literature Review on Leak Management Techniques for Water Distribution System
Water Resources Management, 2018Co-Authors: Aditya Gupta, Kishor D. KulatAbstract:Water Distribution System suffers from Leakages causing social and economic costs. There is need of platform to manage water distribution system more efficiently by detecting, localizing and controlling the Leakages even before or as soon as they occur, ensuring quality water services to the consumers. Since last two decades, high efforts have been made by researchers for the development of efficient Leakage management techniques for reduction of water losses in distribution system. This paper provides a comprehensive analysis on Leakage management techniques covering three aspects: Leakage assessment, Leakage detection and Leakage control, with an objective to identify present challenges and future scope in their respected field. Role of smart water technologies for efficient Leakages management in pipeline network is also examined and discussed. Conclusion is drawn regarding current Leakage management techniques and proposals for future work and existing challenges are also outlined.
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Leakage reduction in water distribution system using efficient pressure management techniques. Case study: Nagpur, India
Water Supply, 2018Co-Authors: Aditya Gupta, Kishore KulatAbstract:Leakages in water distribution system (WDS) are directly proportional to its operating pressure. Pressure management is becoming an important technique for reducing Leakages in the water networks. This paper presents a pressure management technique for Leakage reduction in north central WDS of Nagpur City, India, using variable speed pump and pressure reducing valves (PRVs). Variable speed pump is utilized for eliminating pressure deficiency during high demand and for reducing excess pressure causing Leakage reduction during lower demand, by controlling the pump speed. PRVs have been used for further Leakage reduction. This paper proposes a modified reference pressure algorithm for determining the location of valves in WDS. A multiobjective genetic algorithm (NSGA-II) is used to determine the optimized control value of pressure reducing valve with respect to change in demand pattern and to minimize the Leakage rate in the WDS. Proposed pressure management technique leads to Leakage reduction of 16.57% to 26.30% with respect to changes in demand pattern, causing daily average saving of 5.066 Ml. Minimum required pressure is maintained on every demand nodes to avoid pressure deficiency in WDS.
Lee Tae Rim - One of the best experts on this subject based on the ideXlab platform.
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Optimisation of alignment materials for minimising residual retardation in in-plane switching liquid crystal display
Liquid Crystals, 2016Co-Authors: Lee Tae Rim, Seung Hee Lee, Jin Ho Kim, Myung Chul Jun, Hong Koo BaikAbstract:ABSTRACTThe light Leakage in a black state of in-plane switching (IPS) liquid crystal display (LCD) associated with rubbing process has been investigated. The mechanical rubbing process with a cloth caused orientation disorders in the liquid crystal directors and these partial orientation disorders result in residual retardations of the IPS LCD, causing the light Leakages at the black state. In this study, we theoretically estimated how the light Leakage is associated with the rubbing uniformity using 2 × 2 Jones matrix equation and also experimentally confirmed how it is associated with structural properties of the alignment layer. The light Leakage was clearly reduced in the alignment layer with reduced crystallinity and flexibility.
