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Causes of blindness and vision impairment in 2020 and trends over 30 years, and prevalence of avoidable blindness in relation to VISION 2020: the Right to Sight: an analysis for the Global Burden of Disease Study (vol 2, pg 144, 2021)

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LANCET GLOBAL HEALTH 2021年第4期9卷 E408-E408页

作者： Steinmetz, Jaimie D. Vision and Eye Research Institute Anglia Ruskin University Cambridge United Kingdom Biomedical Informatics Seoul National University Hospital Seoul South Korea Institute for Health Metrics and Evaluation University of Washington Seattle WA United States Department of Health Metrics Sciences School of Medicine University of Washington Seattle WA United States Institute of Health Services Research Yonsei University Seoul South Korea Department of Ophthalmology University of Washington Seattle WA United States Department of Mathematics Imperial College London London United Kingdom WHO Collaborating Centre for Public Health Education and Training Imperial College London London United Kingdom Department of Primary Care and Public Health Imperial College London London United Kingdom School of Population and Global Health University of Melbourne Carlton VIC Australia School of Optometry and Vision Science UNSW Sydney NSW Australia Brien Holden Vision Institute Sydney Australia Department of Ophthalmology University of Adelaide Adelaide SA Australia Department of Parasitology and Mycology Jahrom University of Medical Sciences Jahrom Iran Department of Clinical Sciences University of Sharjah Sharjah United Arab Emirates Ophthalmic Research Center Shahid Beheshti University of Medical Sciences Tehran Iran Department of Ophthalmology Shahid Beheshti University of Medical Sciences Tehran Iran Research Institute for Endocrine Sciences Shahid Beheshti University of Medical Sciences Tehran Iran Ophthalmic Epidemiology Research Center Shahid Beheshti University of Medical Sciences Tehran Iran Health Services Management Department Qazvin University of Medical Sciences Qazvin Iran Department of Systems Populations and Leadership University of Michigan Ann Arbor MI United States Department of Medicine Sofia Ismail Memorial Medical Centre Bogura Bangladesh The Fred Hollows Foundation Sydney NSW Australia Berhan Public Health & Eye Care Consultancy Addis A

Hospital El Salvador: a novel paradigm of intensive care in response to COVID-19 in central America. Lancet Glob Health 2021;9: e241?42?In this Comment, the conflict of interest statement should have included the following: ?By virtue of their roles within a public hospital or the Ministry of Health, MB, LC, WH, and XS are government employees. The findings and conclusions in the Comment are only those of the authors.? This correction has been made as of Feb 26, 2021.

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Seasonal Variation of the Monthly Efficiencies of Thin Film PV Modules 5

Seasonal Variation of the Monthly Efficiencies of Thin Film ...

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5th International Renewable and Sustainable Energy Conference, IRSEC 2017

作者： Özden, Talat Turan, Raşit Akmoǧlu, Bülent Gültekin Department of Electrical and Electronics Engineering Gümüşhane University Günüşhane29100 Turkey Ankara06800 Turkey Department of Physics Faculty of Arts and Sciences METU Ankara06800 Turkey Earth System Science Program Graduate School of Natural and Applied Sciences METU Ankara06800 Turkey

ISBN: (纸本)9781538628478

Outdoor testing of solar photovoltaic (PV) modules must be carried out at different climates as PV power plants nowadays are installed and continues to be installed in many countries. Present study is outdoor testing results and analyses of 5 thin film modules in Ankara, Turkey. The analyses are carried out using monthly efficiencies of the modules that are derived using the energy yield and input. The average efficiencies of the CIS, CIGS and μc-Si/a-Si thin film modules are. We present the monthly and average efficiencies and discuss their variations with the parameter: input, ambient temperature and relative humidity. We also carried out seasonal analyses using Pearson's correlation coefficient and find out that the efficiencies are differently dependent on the above mentioned parameters. This arose a new open question on differentiation of the strength of the effect of each parameter on the monthly efficiencies. © 2017 IEEE.

关键词： Solar energy

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Fast saliency detection using sparse random color samples and joint upsampling 29

Fast saliency detection using sparse random color samples an...

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29th SIBGRAPI Conference on Graphics, Patterns and Images, SIBGRAPI 2016

作者： Lie, Maiko Min Ian Borba, Gustavo Benvenutti Neto, Hugo Vieira Gamba, Humberto Remigio Graduate Program in Electrical and Computer Engineering Federal University of Technology - Paraná Curitiba Brazil Graduate Program in Biomedical Engineering Federal University of Technology - Paraná Curitiba Brazil

ISBN: (纸本)9781509035687

The human visual system employs a mechanism of visual attention, which selects only part of the incoming information for further processing. Through this mechanism, the brain avoids overloading its limited cognitive capacities. In computer vision, this task is usually accomplished through saliency detection, which outputs the regions of an image that are distinctive with respect to its surroundings. This ability is desirable in many technological applications, such as image compression, video quality assessment and content-based image retrieval. In this paper, a saliency detection method based on color distance with sparse random samples and joint upsampling is presented. This approach computes full-resolution saliency maps with short runtime by leveraging both edge-preserving smoothing and joint upsampling capabilities of the Fast Global Smoother. The proposed method is assessed through precision-recall curves, F-measure and average runtime on the MSRA1K dataset. Results show that the method is competitive with state-of-the-art algorithms in both saliency detection accuracy and runtime. © 2016 IEEE.

关键词： Image compression

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An improved solar array simulator topology based on LCL filter

An improved solar array simulator topology based on LCL filt...

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IEEE International Symposium on Power Electronics for Distributed Generation Systems (PEDG)

作者： Shirleny P. Freitas Natália A. C. Fernandes Victor F. Mendes Allan F. Cupertino Heverton A. Pereira Electrical Engineering Postgraduate Program CEFET-MG - UFSJ Belo Horizonte Minas Gerais Brazil Graduate Program in Electrical Engineering Federal University of Minas Gerais Belo Horizonte MG Brazil Department of Electrical Engineering Federal University of Viçosa Viçosa MG Brazil

ISBN: (纸本)9781509053407

Photovoltaic energy has gained prominence in the current context of energy generation. The fundamental element of a photovoltaic system connected to the electric grid is the electronic converter. In order to be marketed, electronic converters must be tested and certified in accordance with current standards. In the certification process, an equipment known as a solar array simulator (SAS) is used. This work presents the modeling and the control structure of a 10 kW SAS for tests of electronic converters for photovoltaic systems. The novelty introduced in this work is the insertion of a passive filter at the SAS output. The purpose of this filter is to reduce the output current ripple, which is directly influenced by the input capacitance of the inverter under test (uncertain variable). It is considered a structure with 2 stages that allows a greater flexibility in relation to the arrangements to be emulated. The results showed that with the use of a passive filter the topology presented operational advantages being able to represent the characteristics of the photovoltaic arrangement and a considerable reduction in the output current ripple of the simulator.

关键词： Synthetic aperture sonar Inverters Photovoltaic systems Inductance Inductors Topology

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Automatic image thumbnailing based on fast visual saliency detection 16

Automatic image thumbnailing based on fast visual saliency d...

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22nd Brazilian Symposium on Multimedia and the Web, WebMedia 2016

作者： Lie, Maiko M. I. Neto, Hugo Vieira Borba, Gustavo B. Gamba, Humberto R. Graduate Program in Electrical and Computer Engineering Federal University of Technology - Paraná Curitiba Brazil Graduate Program in Biomedical Engineering Federal University of Technology - Paraná Curitiba Brazil

ISBN: (纸本)9781450345125

Image retargeting has seen many applications in areas such as content adaptation for small displays and thumbnailing for image database browsing. Most retargeting methods, however, are too expensive computationally to achieve fast performance on common desktop systems. This work addresses the problem of fast automatic thumbnailing for image browsing. A simple approach of automatic thresholding saliency maps and cropping using bounding box extraction is presented. Eight of the fastest saliency detectors in the literature and three automatic thresholding methods are assessed using precision, recall, F-score and execution time on the MSRA1K dataset. The results show that the approach is computationally efficient and adequate for fast automatic image thumbnailing. In particular, saliency detection with difference to random color samples (RS) thresholded by Rosin's method achieved the best trade-off between execution time and F-score. © 2016 ACM.

关键词： Economic and social effects

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Distributed optical fiber microphone

Distributed optical fiber microphone

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IEEE Sensors

作者： C. R. Zamarreno C. Martelli R. Daciuk G. Dutra U. J. Dreyer J. C. Cardozo Da Silva I. R. Matias F. J. Arregui Electrical and Electronic Engineering Department Public University of Navarra Pamplona NA/Spain Graduate School on Electrical Engineering and Applied Computer Science Federal University of Technology Curitiba PR/Brazil

ISBN: (纸本)9781509010134

A distributed acoustic sensing (DAS) optical fiber system has been studied using intensity-based optical time-domain reflectometry (i-OTDR). The fiber strain originated by sound waves (pressure waves) is in general quite small to enable the detection using conventional Rayleigh backscattering intensity based systems (low signal to noise ratio). Here, a 10 m portion of optical fiber has been rolled following a plane spiral shape in order increase the fiber surface subjected to the acoustic waves pressure and improve the signal to noise ratio (SNR). The performance of the system within the human voice frequency range (300-3400Hz) has been studied showing to effectively acquire voice signals at different points along a ～2.5 Km fiber.

关键词： Distributed acoustic sensing Rayleigh scattering optical fiber optical microphone

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On the Yearly Performance of a Bifacial PV Module in Central Anatolia - Turkey 5

On the Yearly Performance of a Bifacial PV Module in Central...

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5th International Renewable and Sustainable Energy Conference, IRSEC 2017

作者： Özden, Talat Turan, Raşit Aklnoǧlu, Bülent Gültekin Department of Electrical and Electronics Engineering Gumüshane University Gumushane29100 Turkey Ankara06800 Turkey Department of Physics Faculty of Arts and Sciences Middle East Technical University METU Ankara06800 Turkey Earth System Science Program Graduate School of Natural and Applied Sciences METU Ankara06800 Turkey

ISBN: (纸本)9781538628478

With the tremendous increase in the photovoltaic (PV) power plants world-wide remarkable decreases in their installation prices per watt are attained mainly due to economic scale effect. This brings questioning to increase their energy yields by considering any possible way like fabricating bifacial solar modules. Present study is on the performance analysis of a bifacial PV module using one-year outdoor testing results in Ankara-Turkey. The module performed very well and reached a specific yield value of 1750 kWh/kWp. This value for Central Anatolia region is well above the values predicted (and suggested) by the local authorities. The efficiency and performance ratio variation with respect to ambient and module temperature are obtained. The calculated dependence of efficiency on the module temperature is found to be η=-0.073Tmod+18.05, and the maximum measured module temperature is about 70 °C. The results show that the bifacial modules have the potential to replace the mono facial modules that are now dominating the PV market. © 2017 IEEE.

关键词： Solar energy

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The Effects of Trajectory and Endpoint Errors in a Reaching Movement on the Sense of Agency

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Psychology 2017年 8卷 2321-2332页

作者： Takuro Zama Yoshiyuki Takahashi Sotaro Shimada Electrical Engineering Program Graduate School of Science and Technology Meiji University Kawasaki-shi Japan Department of Electronics and Bioinformatics School of Science and Technology Meiji University Kawasaki-shi Japan

The sense of agency (SoA) refers to the subjective feeling that an individual can control their own action with their own will. However, it is still unclear which aspects of the motor control process precisely affect the sense of agency. In this study, we investigated how the SoA is modulated by the online motor performance (trajectory error) and the outcome of the reaching movement (endpoint error). The results showed that the invalid priming and the visual feedback delay significantly increased both the trajectory and endpoint errors and that these errors significantly attenuated the SoA. The further correlation analyses showed that the decrease in SoA was significantly correlated with the trajectory error, but not with the endpoint error, when the error was explicitly noticed. We suggest that the deterioration in online motor performance, at least in a reaching movement, is the main cause of the attenuation in the SoA.

关键词： Sense of Agency Online Motor Control Error Detection

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A mechanistic model of connector hubs, modularity, and cognition

arXiv

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arXiv 2018年

作者： Bertolero, Maxwell A. Yeo, B. T. Thomas Bassett, Danielle S. D'Esposito, Mark Helen Wills Neuroscience Institute Department of Psychology University of California BerkeleyCA94720-3190 United States Department of Bioengineering School of Engineering and Applied Sciences University of Pennsylvania PhiladelphiaPA19104 United States Electrical and Computer Engineering ASTAR-NUS Clinical Imaging Research Centre Singapore Institute for Neurotechnology & Memory Networks Programme National University of Singapore Singapore119077 Singapore NUS Graduate School for Integrative Sciences and Engineering National University of Singapore Singapore Department of Electrical & Systems Engineering School of Engineering and Applied Sciences University of Pennsylvania PhiladelphiaPA19104 United States Department of Physics & Astronomy College of Arts and Sciences University of Pennsylvania PhiladelphiaPA19104 United States Department of Neurology Perelman School of Medicine University of Pennsylvania PhiladelphiaPA19104 United States

The human brain network is modular-comprised of communities of tightly interconnected nodes1. This network contains local hubs, which have many connections within their own communities, and connector hubs, which have connections diversely distributed across communities2,3. A mechanistic understanding of these hubs and how they support cognition has not been demonstrated. Here, we leveraged individual differences in hub connectivity and cognition. We show that a model of hub connectivity accurately predicts the cognitive performance of 476 individuals in four distinct tasks. Moreover, there is a general optimal network structure for cognitive performance- individuals with diversely connected hubs and consequent modular brain networks exhibit increased cognitive performance, regardless of the task. Critically, we find evidence consistent with a mechanistic model in which connector hubs tune the connectivity of their neighbors to be more modular while allowing for task appropriate information integration across communities, which increases global modularity and cognitive performance. Copyright © 2018, The Authors. All rights reserved.

关键词： Structural optimization

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Design of Simulation Product for Stability of Electric Power System Using Power System Stabilizer and Optimal Control

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Journal of Physics: Conference Series 2018年第1期970卷

作者： Agus Junaidi K Abdul Hamid Department of Electrical Engineering Faculty of Engineering Universitas Negeri Medan Graduate student-Doctoral Program Faculty of Engineering Universitas Negeri Padang Faculty of Engineering Universitas Negeri Medan

This paper will discuss the use of optimal control and Power System Stabilizer (PSS) in improving the oscillation of electric power system. Oscillations in the electric power system can occur due to the sudden release of the load (Switcing-Off). The oscillation of an unstable system for a long time causes the equipment to work in an interruption. To overcome this problem, a control device is required that can work effectively in repairing the oscillation. The power system is modeled from the Single Machine Infinite Bus Model (SMIB). The state space equation is used to mathematically model SMIB. SMIB system which is a plant will be formed togetherness state variables (State-Space), using riccati equation then determined the optimal gain as controller plant. Plant is also controlled by Power Stabilizer System using phase compensation method. Using Matlab Software based simulation will be observed response of rotor speed change and rotor angle change for each of the two controlling methods. Simulation results using the Simulink-MATLAB 6.1 software will compare the analysis of the plant state in Open loop state and use the controller. The simulation response shows that the optimal control and PSS can improve the stability of the power system in terms of acceleration to achieve settling-time and Over Shoot improvement. From the results of both methods are able to improve system performance.

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