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arXiv 2025年

作者： Martín-Luna, Pablo Bonatto, Alexandre Bontoiu, Cristian Lei, Bifeng Xia, Guoxing Resta-López, Javier Universitat de València - Consejo Superior de Investigaciones Científicas Paterna46980 Spain Graduate Program in Information Technology and Healthcare Management The Beam Physics Group Federal University of Health Sciences of Porto Alegre RS Porto Alegre90050-170 Brazil Department of Physics The University of Liverpool LiverpoolL69 3BX United Kingdom The Cockcroft Institute Sci-Tech Daresbury WarringtonWA4 4AD United Kingdom Department of Physics and Astronomy The University of Manchester ManchesterM13 9PL United Kingdom Universidad de Valencia Valencia46071 Spain

The interaction of fast charged particles with graphene layers can generate electromagnetic modes. This wake effect has been recently proposed for short-wavelength, high-gradient particle acceleration and for obtaining brilliant radiation sources. In this study, the excitation of wakefields produced by a point-like charged particle moving parallel to a multilayer graphene array (which may be supported by an insulated substrate) is studied using the linearized hydrodynamic theory. General expressions for the excited longitudinal and transverse wakefields have been derived. The dependencies of the wakefields on the positions of the layers and the substrate, the velocity and the surface density have been extensively analyzed. This study provides a deeper understanding of the physical phenomena underlying plasmonic excitations in graphene layers, paving the way for potential applications of these structures in particle acceleration, nanotechnology and materials science. © 2025, CC BY-NC-ND.

关键词： Plasmons

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Cascade of genetic algorithm and decision tree for cancer classification on gene expression data

Cascade of genetic algorithm and decision tree for cancer cl...

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37th International Conference on Computers and Industrial Engineering 2007

作者： Yeh, Jinn-Yi Chang, Der-Ming Department of Management Information Systems National Chiayi University Taiwan Department and Graduate Program of BioIndustry Technology Da-Yeh University Taiwan

ISBN: (纸本)9781627486811

Cancer classification through gene expression data analysis has emerged as an active area of research recently. Gene expression is the process of transcribing a gene's DNA sequence into RNA. A gene's expression level indicates the approximate number of copies of that gene's RNA produced in a cell. This is thought to correlate with the amount of the corresponding protein made. The expression of a gene provides a measure of activity of a gene under certain biochemical conditions. For example, cancers are usually reflected in the change of the expression values of certain genes. Recent studies on molecular level classification of tissues have produced remarkable results, and indicated that gene expression assays could significantly aid in the development of efficient cancer diagnosis and classification platforms. However, cancer classification based on the DNA array data is still a difficult problem. The main challenge is the overwhelming number of genes relative to the number of training samples. This implies that we must deal with a huge number of irrelevant genes. An efficient algorithm is required to reduce the computational overhead. The other challenge is from the presence of noise inherent in the data set. It makes accurate classification of data more difficult when the sample size is small. This paper applies genetic algorithms (GA) for selecting a group of relevant genes from cancer microarray data. Then the decision tree based cancer classifier is built on top of these selected genes. The performance of this approach is evaluated by comparing with other gene selection methods (e.g., t-statistics, GS method, and information gain) using the publicly available gene expression data set such as Colon, Leukemia, Lymphoma, Lung and central nervous system (CNS). Experimental results indicate that the cascade of GA and decision tree has the highest accuracy rate among different methods.

关键词： Genetic algorithms

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Need Analysis of Interactive Multimedia Development for Virtual Learning in Pandemic 4

Need Analysis of Interactive Multimedia Development for Virt...

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4th International Conference on Electrical, Electronics, Informatics, and Vocational Education, ICE-ELINVO 2021

作者： Lempas, J.F. Soenarto, S. Barahama, A.D. Instructional Technology Post-Graduate Program Universitas Negeri Yogyakarta Jalan Colombo 01 Daerah Istimewa Yogyakarta 55281 Indonesia Department of Electronics and Informatics Engineering Education Post-Graduate Program Universitas Negeri Yogyakarta Jalan Colombo 01 Daerah Istimewa Yogyakarta 55281 Indonesia

The pandemic that has not ended has an impact on changing the educational paradigm. Existing conditions demand to continue to use virtual learning. During the epidemic, this study will examine students' demand for interactive multimedia in virtual learning. The interviews reveal that the media that teachers provide in virtual learning during this pandemic has limits. Data was gathered through interviews and questionnaires given to teachers and students. The student requirements questionnaire reveals that interactive multimedia is the most effective instructional medium for pupils. This study is part of a larger investigation of the evolution of multimedia learning during a pandemic. © 2021 Institute of Physics Publishing. All rights reserved.

关键词： Students

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Analysis of delay factors on drilling projects on PT China Oilfields Services Limited 2

Analysis of delay factors on drilling projects on PT China O...

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2nd International Conference on Biospheric Harmony Advanced Research, ICOBAR 2020

作者： Sardjono, W. Perdana, W.G. Ansori, R. Utama, D.N. Information Systems Management Department BINUS Graduate Program-Master of Information Systems Management BINA NUSANTARA University Jakarta11480 Indonesia Post Graduate Program School of Environmental Science University of Indonesia Jakarta Indonesia Graduate Program Master of Business Administration Faculty of Economic and Business University of Gadjahmada Yogyakarta Indonesia Computer Science Department BINUS Graduate Program-Master of Computer Science Bina Nusantara University Jakarta11480 Indonesia

In carrying out drilling projects at PT China Oilfields Services Limited ( COSL) Indo, especially Project 1 to Project 4, there were a mismatch between the initial plan of the project and the actualisation in the field because there were inhibiting factors in implementing the project. The purpose of the research was to look the factors that caused for the additional time in well drilling project at PT. COSL Indo, to build a relationship model of these factors, and formulate a strategy for the company to be able to overcome the occurrence of additional time in the future project. Data analysis was conducted by using a factor analysis method and the location of the research was carried out in just one company with 102 valid respondents. The results of the research indicate that there are four factors that influence the time gap, namely Project Management Activities, Risk Analysis and Procurement, Manage Stairs, and Project Planning Development. By knowing the causes of the delay, companies can find the best solutions for future learning and the impact on environmental, social and economic problems can also be anticipated so that sustainable development occurs in the context of petroleum management. © Published under licence by IOP Publishing Ltd.

关键词： Risk analysis

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A High-Gain Serial-Parallel-Switched-Capacitor Coupled-Inductor Boost DC-AC Inverter

A High-Gain Serial-Parallel-Switched-Capacitor Coupled-Induc...

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2017 International MultiConference of Engineers and Computer Scientists, IMECS 2017

作者： Chang, Yuen-Haw Li, Zheng-Bin Department and Graduate Institute of Computer Science and Information Engineering Chaoyang University of Technology R.O.C. Post code: 413 Taichung Taiwan

ISBN: (纸本)9789881404770

A closed-loop scheme of a high-gain serial-parallel-switched-capacitor coupled-inductor (SPSCCI) boost DC-AC inverter is proposed by combining a two-phase generator and sinusoidal pulse-width-modulation (SPWM) controller for low-power step-up DC-AC conversion and regulation. In this inverter, the power part is composed of SPSCCI booster and half-bridge DC-link. This booster is a 4-stage SC circuit plus combining a coupled-inductor, and it raises the voltage gain up to [4(n+1)+(1+nD)/(1-D)] at most via two-phase operation, where D is the duty cycle and n is the turn ratio of coupled-inductor. The DC-link is a half-bridge circuit in order to convert the DC voltage into AC via SPWM control for realizing the range of sinusoidal output: +0.5[4(n+1)+(1+nD)/(1-D)]VS~ -0.5[4(n+1)+(1+nD)/(1-D)]VS. Practically, the maximum output voltage can reach 26.0 times voltage of source VS while D=0.5, n=4. Here, the SPWM is employed to enhance regulation capability for the different output amplitude and frequency, as well as robustness to source/loading variation. Finally, the closed-loop SPSCCI inverter is designed and simulated by SPICE for some cases: steady-state and dynamic responses. All results are illustrated to show the efficacy of the proposed scheme.

关键词： SPICE

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A High-Gain Multiphase Switched-Capacitor Coupled-Inductor Step-Up DC-DC Converter

A High-Gain Multiphase Switched-Capacitor Coupled-Inductor S...

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2017 International MultiConference of Engineers and Computer Scientists, IMECS 2017

作者： Chang, Yuen-Haw Jhao, En-Ping Department and Graduate Institute of Computer Science and Information Engineering Chaoyang University of Technology R.O.C. Post code: 413 Taichung Taiwan

ISBN: (纸本)9789881404770

A closed-loop scheme of a high-gain multiphase switched-capacitor coupled-inductor (MSCCI) converter is proposed by combining a phase generator and pulse-width-modulation-based (PWM-based) gain compensator for step-up DC-DC conversion and regulation. The power part between source VS and output VO contains a three-stage serial-parallel switched-capacitor (SC) circuit plus a coupled-inductor device, and it raises the voltage gain up to 4[(n+1)+(1+nD)/(1-D)] at most, where D means the duty cycle of PWM and n is trun ratio of coupled inductor. Practically, this MSCCI can boost the voltage gain up to 44 when D=0.5, n=4. Further, the PWM technique is adopted not only to enhance the output regulation for the compensation of the dynamic error between the practical and desired outputs, but also to reinforce output robustness against source or loading variation. Finally, the closed-loop MSCCI is designed by SPICE and simulated for some cases: steady-state and dynamic responses. All results are illustrated to show the efficacy of the proposed scheme.

关键词： Pulse width modulation

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Pathophysiological role of endothelial biomarkers in Bothrops sp. venom-induced renal dysfunction and the therapeutic effect of antivenom

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Toxicon: X 2025年 26卷

作者： Nicole Coelho Lopes Gdayllon Cavalcante Meneses Ranieri Sales de Souza Santos Leticia Machado de Araújo Bruna Viana Barroso Martins Katarina Maria dos Reis Araújo Valéria Holanda Nogueira de Aquino Igor Moreira de Almeida Sandra Mara Brasileiro Mota Geraldo Bezerra da Silva Junior Camila Eleuterio Rodrigues Elizabeth De Francesco Daher Polianna Lemos Moura Moreira Albuquerque Alice Maria Costa Martins Pharmacology Post-Graduate Program Federal University of Ceará Fortaleza Ceará Brazil Department of Clinical and Toxicological Analysis Federal University of Fortaleza Fortaleza Ceará Brazil Toxicological Information and Assistance Center Instituto Doutor Jose Frota Hospital Fortaleza Ceará Brazil University of Fortaleza School of Medicine Fortaleza Ceará Brazil Hospital das Clínicas University of São Paulo School of Medicine São Paulo Brazil University of New South Wales Sydney Australia Medical Sciences Post-Graduate Program Federal University of Ceará Ceará Brazil Charles Darwin University Darwin Australia

Snakebite antivenom (SAV) is the standard treatment option to neutralize the toxic effects of snake venom, but their consequences on kidney function need to be better understood. This study aims to evaluate the effects of antivenom on kidney and endothelial biomarkers due to Bothrops venom in two subgroups of patients distinguished by the presence of hemorrhagic syndrome at admission. This prospective study included 34 snakebite patients admitted to a tertiary hospital in Northeast Brazil between August 2019 and November 2020, 50 % of whom experienced spontaneous bleeding. Endothelial and kidney damage biomarkers were analyzed at three time points: before antivenom infusion and after 10 h and 20 h of antivenom infusion. Bleeding patients exhibited higher urine Neutrophil Gelatinase-Associated Lipocalin (uNGAL) and Kidney Injury Molecule-1 (KIM-1) levels, indicating incomplete renal recovery until 20h after antivenom. This group showed higher serum angiopoietin-2 (Ang-2) levels and vascular cell adhesion molecule-1 (VCAM-1). VCAM-1 levels positively correlated with kidney biomarker levels at each time point, especially after SAV. uNGAL was variant across VCAM-1, Ang-1, and Ang-2 levels before antivenom. Elevated levels of uNGAL and KIM-1, observed 10 h after SAV administration, may indicate incomplete renal protection and a potential risk for the development of chronic kidney injury, requiring future follow-up.

关键词： Snakebite Antivenom Kidney injury Vascular cell adhesion molecule-1 Angiopoietins KIM-1

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Routing Techniques in Sensor Network–A Survey

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Procedia Engineering 2012年 38卷 2739-2747页

作者： S. Saranya M. Princy Post Graduate Scholar Department of Information Technology Karunya UniversityIndia Lecturer Department of Information Technology Karunya University India

Wireless Sensor Networks (WSNs) consist of large number of sensor nodes with sensing, communication and computation capabilities. Sensor nodes have limited energy supply, bandwidth and computational capacity. Routing in sensor network differ based on the network architecture and the application in order to achieve high energy efficiency and better lifetime. In this paper, we have given the design issues of sensor network and also we classified the routing techniques into three main categories, flat, hierarchical and location based. We have described each routing techniques in appropriate category and presented a comparison of these routing techniques.

关键词： Classification of Routing Design Issues Data Aggregation Sensor Network

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Microservices Architecture As a Data Governance Tools in Decentralized E-Government

Microservices Architecture As a Data Governance Tools in Dec...

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2022 International Conference on Science and technology, ICOSTECH 2022

作者： Paramita, Adi Suryaputra Gaol, Ford Lomban Ranti, Benny Supangkat, Suhono Harso Graduate Program Universitas Ciputra Surabaya/ Bina Nusantara University Information Systems Department/Doctor of Computer Science Jakarta Surabaya Indonesia Bina Nusantara University Doctor of Computer Science Graduate Program Jakarta Indonesia Institute of Technology Bandung Systems and Information Technology Department Bandung Indonesia

ISBN: (纸本)9781665479851

Electronic government, or e-Government, is the use of information and communication technology by the public sector (ICT). Additionally, it can be viewed as a paradigm shift in terms of how governments operate. The government protects public values, while citizens act as problem solvers, co-creators, and active participants in value creation. On the other hand, decentralized systems have grown in popularity over the last few years. Data has become a significant issue in decentralized E-Government;each local entity has their own data, which is private. A suitable data governance tool is required to ensure that data governance is properly implemented and to prevent the organizational entity from leaking information. The purpose of this research is to examine the data governance tools mechanism utilizing microservices. © 2022 IEEE.

关键词： information use

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Modeling the relationship between public transportation and traffic conditions in urban areas: A system dynamics approach

Modeling the relationship between public transportation and ...

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International Conference on Physics and Mathematics for Biological Science 2019, ICOPAMBS 2019

作者： Sardjono, W. Selviyanti, E. Perdana, W.G. Information Systems Management Department BINUS Graduate Program Master of Information Systems Management Bina Nusantara University Jakarta Indonesia Health Department Politeknik Negeri Jember Jember Jawa Timur68124 Indonesia Post Graduate Program of Environmental Science School of Environmental Science University of Indonesia Jakarta11480 Indonesia

The goals of the paper were to describe were and find the relations between numbers of available public transportation and traffic congestion and other variables that can reduce traffic congestion in Jakarta. The data that used in the simulation were provided by DKI Jakarta Provincial Statistics Agency from view years ago. To analyze the problem, System Dynamics are used to simulate the condition in the future using the models created based on relations between several variables. The results of the analysis shows that numbers of available public transportation cannot reduce traffic congestion if the numbers of private transportation weren't decreased. It can be concluded that government must force their citizen to reduce the number of private transportation by increasing the inflation supported by increasing numbers of available public transportation to accommodate deficit in transportation while building new roads to accommodate transportation growth in the future. © Published under licence by IOP Publishing Ltd.

关键词： Traffic congestion

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