The Experts below are selected from a list of 309 Experts worldwide ranked by ideXlab platform
Eric Castet - One of the best experts on this subject based on the ideXlab platform.
-
small effect of Interline spacing on maximal reading speed in low vision patients with central field loss irrespective of scotoma size
Investigative Ophthalmology & Visual Science, 2010Co-Authors: Aurelie Calabrese, Jeanbaptiste Bernard, Louis Hoffart, Geraldine Faure, Fatiha Barouch, John Conrath, Eric CastetAbstract:PURPOSE. It has been suggested that crowding, the adverse low-level effect due to the proximity of adjacent stimuli, explains slow reading in low-vision patients with absolute macular scotomas. According to this hypothesis, crowding in the vertical dimension should be released by increasing the vertical spacing between lines of text. However, studies with different experimental paradigms and only a few observers have given discrepant results on this question. The purpose of this study was to investigate this issue with a large number of patients whose macular function was carefully assessed. METHODS. MP1 microperimetry examination was performed for each low-vision patient. Only eyes with an absolute macular scotoma and no foveal sparing (61 patients with AMD, 90 eyes; four patients with Stargardt disease, eight eyes) were included. Maximal reading speed was assessed for each eye with French sentences designed on the MNREAD test principles. RESULTS. The effect of Interline spacing on maximal reading speed (MRS) was significant although small; average MRS increased by 7.1 words/min from standard to double Interline spacing. The effect was weak irrespective of PRL distance from the fovea and scotoma area and regardless of whether an eccentric island of functional vision was present within the scotoma. CONCLUSIONS. Increasing Interline spacing is advisable only for very slow readers (<20 words/min) who want to read a few words (spot reading). Vertical crowding does not seem to be a major determinant of maximal reading speed for patients with central scotomas. (Invest Ophthalmol Vis Sci. 2010; 51: 1247-1254) DOI: 10.1167/iovs.09-3682
-
Small Effect of Interline Spacing on Maximal Reading Speed in Low-Vision Patients with Central Field Loss Irrespective of Scotoma Size
Investigative Ophthalmology & Visual Science, 2010Co-Authors: Aurelie Calabrese, Jeanbaptiste Bernard, Louis Hoffart, Geraldine Faure, Fatiha Barouch, John Conrath, Eric CastetAbstract:PURPOSE. It has been suggested that crowding, the adverse low-level effect due to the proximity of adjacent stimuli, explains slow reading in low-vision patients with absolute macular scotomas. According to this hypothesis, crowding in the vertical dimension should be released by increasing the vertical spacing between lines of text. However, studies with different experimental paradigms and only a few observers have given discrepant results on this question. The purpose of this study was to investigate this issue with a large number of patients whose macular function was carefully assessed. METHODS. MP1 microperimetry examination was performed for each low-vision patient. Only eyes with an absolute macular scotoma and no foveal sparing (61 patients with AMD, 90 eyes; four patients with Stargardt disease, eight eyes) were included. Maximal reading speed was assessed for each eye with French sentences designed on the MNREAD test principles. RESULTS. The effect of Interline spacing on maximal reading speed (MRS) was significant although small; average MRS increased by 7.1 words/min from standard to double Interline spacing. The effect was weak irrespective of PRL distance from the fovea and scotoma area and regardless of whether an eccentric island of functional vision was present within the scotoma. CONCLUSIONS. Increasing Interline spacing is advisable only for very slow readers (
Xu Cai - One of the best experts on this subject based on the ideXlab platform.
-
an improved triple Interline dc power flow controller for bidirectional power control
IEEE Region 10 Conference, 2020Co-Authors: Y I Jing, Xu Zhong, Miao Zhu, Han Wang, Xu CaiAbstract:For the operational safety and stability of electrical system, effective power flow control in meshed high voltage direct current (HVDC) grids makes sense. In order to realize the objective of controlling several lines simultaneously and independently in a convenient way, Interline dc power flow controller (IDCPFC) has been introduced. To cover some shortages of present IDCPFC topologies, an improved triple Interline dc power flow controller (TI-DCPFC), capable of controlling power flow of two lines actively, has been proposed in this paper. To explain it thoroughly and explicitly, its operational principle is illustrated combined with the mathematic equations firstly. Then, to validate its capacity of dealing with occasions of bidirectional flows and the dual-freedom control function, the theoretical control strategy and simulation results in a typical working mode are referred to comprehensively.
-
a triple Interline dc power flow controller with dual freedom control function
Conference on Industrial Electronics and Applications, 2019Co-Authors: Siqi Liu, Xu Zhong, Miao Zhu, Xu CaiAbstract:In meshed HVDC grids, the power flow distribution has a significant influence on the operational safety of electrical system. Independent power flow controllers are essential since voltage source converters cannot accurately control the power flow of each branch. A triple Interline DC power flow controller (TI-DCPFC) with dual-freedom control is proposed in this paper. First, the power flow ranges of each line in a 4-terminal HVDC grid where an Interline DC power flow controller (IDCPFC) and a TI-DCPFC is installed separately, are analyzed. It verifies that extended power flow controllers enlarge the controlling diversion. Then, a new topology of TI-DCPFC with dual-freedom control is proposed and its operational modes as well as control strategy is discussed. Finally, the performance of TI-DCPFC applied in a 4-terminal meshed HVDC grid in different cases is tested by a series of simulations.
Aurelie Calabrese - One of the best experts on this subject based on the ideXlab platform.
-
small effect of Interline spacing on maximal reading speed in low vision patients with central field loss irrespective of scotoma size
Investigative Ophthalmology & Visual Science, 2010Co-Authors: Aurelie Calabrese, Jeanbaptiste Bernard, Louis Hoffart, Geraldine Faure, Fatiha Barouch, John Conrath, Eric CastetAbstract:PURPOSE. It has been suggested that crowding, the adverse low-level effect due to the proximity of adjacent stimuli, explains slow reading in low-vision patients with absolute macular scotomas. According to this hypothesis, crowding in the vertical dimension should be released by increasing the vertical spacing between lines of text. However, studies with different experimental paradigms and only a few observers have given discrepant results on this question. The purpose of this study was to investigate this issue with a large number of patients whose macular function was carefully assessed. METHODS. MP1 microperimetry examination was performed for each low-vision patient. Only eyes with an absolute macular scotoma and no foveal sparing (61 patients with AMD, 90 eyes; four patients with Stargardt disease, eight eyes) were included. Maximal reading speed was assessed for each eye with French sentences designed on the MNREAD test principles. RESULTS. The effect of Interline spacing on maximal reading speed (MRS) was significant although small; average MRS increased by 7.1 words/min from standard to double Interline spacing. The effect was weak irrespective of PRL distance from the fovea and scotoma area and regardless of whether an eccentric island of functional vision was present within the scotoma. CONCLUSIONS. Increasing Interline spacing is advisable only for very slow readers (<20 words/min) who want to read a few words (spot reading). Vertical crowding does not seem to be a major determinant of maximal reading speed for patients with central scotomas. (Invest Ophthalmol Vis Sci. 2010; 51: 1247-1254) DOI: 10.1167/iovs.09-3682
-
Small Effect of Interline Spacing on Maximal Reading Speed in Low-Vision Patients with Central Field Loss Irrespective of Scotoma Size
Investigative Ophthalmology & Visual Science, 2010Co-Authors: Aurelie Calabrese, Jeanbaptiste Bernard, Louis Hoffart, Geraldine Faure, Fatiha Barouch, John Conrath, Eric CastetAbstract:PURPOSE. It has been suggested that crowding, the adverse low-level effect due to the proximity of adjacent stimuli, explains slow reading in low-vision patients with absolute macular scotomas. According to this hypothesis, crowding in the vertical dimension should be released by increasing the vertical spacing between lines of text. However, studies with different experimental paradigms and only a few observers have given discrepant results on this question. The purpose of this study was to investigate this issue with a large number of patients whose macular function was carefully assessed. METHODS. MP1 microperimetry examination was performed for each low-vision patient. Only eyes with an absolute macular scotoma and no foveal sparing (61 patients with AMD, 90 eyes; four patients with Stargardt disease, eight eyes) were included. Maximal reading speed was assessed for each eye with French sentences designed on the MNREAD test principles. RESULTS. The effect of Interline spacing on maximal reading speed (MRS) was significant although small; average MRS increased by 7.1 words/min from standard to double Interline spacing. The effect was weak irrespective of PRL distance from the fovea and scotoma area and regardless of whether an eccentric island of functional vision was present within the scotoma. CONCLUSIONS. Increasing Interline spacing is advisable only for very slow readers (
Xu Zhong - One of the best experts on this subject based on the ideXlab platform.
-
an improved triple Interline dc power flow controller for bidirectional power control
IEEE Region 10 Conference, 2020Co-Authors: Y I Jing, Xu Zhong, Miao Zhu, Han Wang, Xu CaiAbstract:For the operational safety and stability of electrical system, effective power flow control in meshed high voltage direct current (HVDC) grids makes sense. In order to realize the objective of controlling several lines simultaneously and independently in a convenient way, Interline dc power flow controller (IDCPFC) has been introduced. To cover some shortages of present IDCPFC topologies, an improved triple Interline dc power flow controller (TI-DCPFC), capable of controlling power flow of two lines actively, has been proposed in this paper. To explain it thoroughly and explicitly, its operational principle is illustrated combined with the mathematic equations firstly. Then, to validate its capacity of dealing with occasions of bidirectional flows and the dual-freedom control function, the theoretical control strategy and simulation results in a typical working mode are referred to comprehensively.
-
a triple Interline dc power flow controller with dual freedom control function
Conference on Industrial Electronics and Applications, 2019Co-Authors: Siqi Liu, Xu Zhong, Miao Zhu, Xu CaiAbstract:In meshed HVDC grids, the power flow distribution has a significant influence on the operational safety of electrical system. Independent power flow controllers are essential since voltage source converters cannot accurately control the power flow of each branch. A triple Interline DC power flow controller (TI-DCPFC) with dual-freedom control is proposed in this paper. First, the power flow ranges of each line in a 4-terminal HVDC grid where an Interline DC power flow controller (IDCPFC) and a TI-DCPFC is installed separately, are analyzed. It verifies that extended power flow controllers enlarge the controlling diversion. Then, a new topology of TI-DCPFC with dual-freedom control is proposed and its operational modes as well as control strategy is discussed. Finally, the performance of TI-DCPFC applied in a 4-terminal meshed HVDC grid in different cases is tested by a series of simulations.
-
A General Extended Theory of Interline DC Power Flow Controller
2019 IEEE Innovative Smart Grid Technologies - Asia (ISGT Asia), 2019Co-Authors: Xu ZhongAbstract:Interline DC power flow controller can be applied to power flow control in multi-line DC grid with good application prospect. A general extended theory of Interline DC power flow controller has been proposed in this paper. N-line Interline DC power flow controller can control (N-1)-line power flow actively. Extended theory including topology, working operation and control strategy are detailed. Simulation results of 3-line IDCPFC proved multi-line power flow ability of proposed extended theory.
Ryan Yaniga - One of the best experts on this subject based on the ideXlab platform.
-
A 47 Million Pixel High-Performance Interline CCD Image Sensor
IEEE Transactions on Electron Devices, 2016Co-Authors: Shen Wang, Douglas A. Carpenter, Adam Dejager, James A. Dibella, James E. Doran, Robert P. Fabinski, Andrew Garland, James A. Johnson, Ryan YanigaAbstract:A 47-million-pixel (47Mp) Interline charge-coupled-device (CCD) image sensor, the world’s highest resolution Interline-transfer CCD, has been developed for industrial, machine vision, and aerial photography applications. The sensor features a 5.5- $\mu \text{m}$ pixel, 16-output low-noise amplifier and a low-smear, fast-dump gate, horizontal lateral overflow drain, and ON-chip temperature sensor. One challenge to manufacture this large sensor is stitching the sensor with different lithography tools, while still achieving equal or better image performance than its predecessor.