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International Conference on I-SMAC (IoT in Social, Mobile, Analytics and Cloud) (I-SMAC)

作者： Raghavi K Bhujang Suma V Dean School of Computer Science and Applications REVA University Research and Industry Incubation Centre Dayanand Sagar College of Engineering

ISBN: (纸本)9781538614433;9781538614426

Software development is a process of well planned and defined steps that contains many series of systematic tasks to deliver the expected product or service to the client. While doing the same, it is likely that there can be many ups and downs in the tasks that are defined starting from the planning stage to completion of deliverable. Also, the series of planned tasks related to product/service delivery in the software development process is likely to fluctuate in terms of Cost, Time, People and Process due to various external factors. These fluctuations should be taken care at the right time with the right mitigation strategy as it spans up further ending with serious obstructions. This paper focuses on how the risk propagates further through the phases of software development with the increase in level of severity. A sample of empirical data taken from existing software development projects throws more light on propagation of severity from the lowest to the highest. This knowledge further aids software personnel and all potential stakeholders to accordingly formulate strategies to effectively manage risk.

关键词： Software Risk management Industries Conferences Task analysis Planning Stakeholders

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An Efficient Privacy Preservation in Vehicular Communications Using EC-Based Chameleon Hashing

SSRN

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SSRN 2018年

作者： Ananth, Christo Selvakani, S. Vasumathi, K. Department of Electronics & Communication Engineering Francis Xavier Engineering College Tirunelveli India Department of Computer Science/Computer Applications Tiruvalluvar University Constituent College of Arts and Science Attupakkam Arakkonam India

The activity related status data will be communicated consistently and shared among drivers through VANETs keeping in mind the end goal to enhance driving security and solace. Along these lines, Vehicular specially appointed systems (VANETs) require safeguarding and secure information correspondences. Without the security and protection ensures, the aggressors could track their intrigued vehicles by gathering and breaking down their movement messages. A mysterious message confirmation is a basic prerequisite of VANETs. To conquer this issue, a protection safeguarding confirmation convention with expert traceability utilizing elliptic bend based chameleon hashing is proposed. Contrasted and existing plans Privacy saving confirmation utilizing Hash Message verification code, this approach has the accompanying better elements: common and unknown validation for vehicle-to-vehicle and vehicle-to-roadside interchanges, vehicle unlinkability, specialist following capacity and high computational effectiveness. © 2018, The Authors. All rights reserved.

关键词： Vehicles

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Mean-field theory for the Nagel-Schreckenberg model with overtaking strategy 5

Mean-field theory for the Nagel-Schreckenberg model with ove...

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5th International Workshop on Statistical Physics and Mathematics for Complex Systems, SPMCS 2017

作者： Su, Zhu Deng, Weibing Han, Jihui Li, Wei Cai, Xu National Engineering Laboratory for Technology of Big Data Applications in Education Central China Normal University Wuhan China Complexity Science Center Institute of Particle Physics Central China Normal University Wuhan China School of Computer and Communication Engineering Zhengzhou University of Light Industry Zhengzhou China

Based on the Nagel-Schreckenberg (NS) model with periodic boundary conditions, a modified model considered overtaking strategy (NSOS) has been proposed [1, 2]. In this paper, we focus on the theoretical analysis of traffic flow for NSOS model by using mean-field method. In the special case of vmax = 1 where vehicles can not overtake preceding ones, the features of stationary state can be obtained exactly. However, in the case of vmax > 1 where overtaking happens, some approximative methods have to be took into account. The main results are that we find the reason why traffic flow is increased in the regime where densities exceed the maximum flow density, and the influence of traffic flow on the transition density is dominated by the braking probability p. © Published under licence by IOP Publishing Ltd.

关键词： Mean field theory

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Devanagari Handwriting Grading System Based on Curvature Features

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computer Modeling in engineering & sciences 2017年第2期113卷 195-202页

作者： Munish Kumar Simpel Rani Jindal Department of Computer Applications GZS Campus College of Engineering&Technology(Maharaja Ranjit Singh Punjab Technical University)BathindaPunjabIndia Computer Science and Engineering Section Yadavindera College of EngineeringTalwandi SaboBathindaPunjabIndia.

Grading of writers in perspective of their handwriting is a challenging task owing to various writing styles of different *** paper presents a framework for grading of Devanagari writers in perspective of their *** framework of grading can be useful in conducting the handwriting competitions and then deciding the winners on the basis of an automated *** the set of features is a challenging task for implementing a handwriting grading system of particular *** this paper,curvature features,namely,parabola curve fitting and power curve fitting have been considered for extracting the vital information of writers,which can be helpful in grading the *** obtaining the classification score,k-NN classifier has been considered in the present *** printed Devanagari font styles,namely,Devlys,Krishna,Krutidev,and Utsaah have been considered for train the proposed model of handwriting *** evaluating the effectiveness of the proposed framework,we have conducted a mock test of 75 Devanagari writers(Left handed and Right handed)and noticed that the proposed framework performing well suitable for conducting the handwriting competition of Devanagari text *** work is also newly in the ground of Devanagari text recognition.

关键词： Handwritten character recognition curvature features parabola curve fitting power curve fitting k-NN

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A Comparative Study of Data Deduplication Strategies

A Comparative Study of Data Deduplication Strategies

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International Conference on Secure Cyber Computing and Communication

作者： Nipun Chhabra Manju Bala Applied Science - Computer Applications I.K.Gujral Punjab Technical University Computer Science Engineering I.K.Gujral Punjab Technical University

ISBN: (纸本)9781538663745;9781538663738

Data Deduplication is a new way of compressing data which is helpful in efficient use of storage space and proves to be a better technique to handle duplicate data. Deduplication allows unique data copy to be uploaded to the storage originally and successive copies are provided with connecting pointer to the authentic stored copy. In cloud computing, data privacy is a significant matter to be considered. This paper surveys the prevalent deduplication strategies and evaluates their methodologies. The survey thus conducted is organized in tabular form to bring out the crisp of progression in the deduplication and its types. We have observed during this survey that in deduplication, confidentiality of data is being compromised at many levels so, it paves a path for a more secure approach in data deduplication in cloud computing.

关键词： Cloud computing Data deduplication Storage complexity in cloud Data security Privacy preserving

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Twist angle dependent interlayer exciton lifetimes in van der waals heterostructures

arXiv

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arXiv 2020年

作者： Choi, Junho Florian, Matthias Steinhoff, Alexander Erben, Daniel Tran, Kha Sun, Liuyang Quan, Jiamin Claassen, Robert Majumder, Somak Hollingsworth, Jennifer A. Taniguchi, Takashi Watanabe, Kenji Ueno, Keiji Singh, Akshay Moody, Galan Jahnke, Frank Li, Xiaoqin Department of Physics and Center for Complex Quantum Systems University of Texas at Austin AustinTX78712 United States Institute for Theoretical Physics University of Bremen Bremen28334 Germany Materials Physics & Applications Division Center for Integrated Nanotechnologies Los Alamos National Laboratory Los AlamosNM87545 United States International Center for Materials Nanoarchitectonics National Institute for Materials Science 1-1 Namiki TsukubaIbaraki305-0044 Japan Research Center for Functional Materials National Institute for Materials Science 1-1 Namiki TsukubaIbaraki305-0044 Japan Department of Chemistry Graduate School of Science and Engineering Saitama University Saitama338-8570 Japan Department of Physics Indian Institute of Science BengaluruKarnataka560012 India Department of Electrical and Computer Engineering University of California Santa Barbara Santa BarbaraCA93106 United States

In van der Waals (vdW) heterostructures formed by stacking two monolayers of transition metal dichalcogenides, multiple exciton resonances with highly tunable properties are formed and subject to both vertical and lateral confinement. We investigate how a unique control knob, the twist angle between the two monolayers, can be used to control the exciton dynamics. We observe that the interlayer exciton lifetimes in MoSe2/WSe2 twisted bilayers (TBLs) change by one order of magnitude when the twist angle is varied from 1◦ to 3.5◦. Using a low-energy continuum model, we theoretically separate two leading mechanisms that influence interlayer exciton radiative lifetimes. The shift to indirect transitions in the momentum space with an increasing twist angle and the energy modulation from the moiré potential both have a significant impact on interlayer exciton lifetimes. We further predict distinct temperature dependence of interlayer exciton lifetimes in TBLs with different twist angles, which is partially validated by experiments. While many recent studies have highlighted how the twist angle in a vdW TBL can be used to engineer the ground states and quantum phases due to many-body interaction, our studies explore its role in controlling the dynamics of optically excited states, thus, expanding the conceptual applications of "twistronics". Copyright © 2020, The Authors. All rights reserved.

关键词： Van der Waals forces

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The Influence of Dust and Black Carbon on Clouds, in Africa

The Influence of Dust and Black Carbon on Clouds, in Africa

引用

作者： Gerard Rushingabigwi Jiahua Zhang Tarak Bachagha Wilson Kalisa Malak Henchiri Ali Shahzad Philibert Nsengiyumva Cesar Nduwayo Bugingo Department of Computer Science and Technology Computer Applications in Remote Sensing Qingdao University Department of Electrical and Electronic Engineering Electronics and Telecommunication University of Rwanda

The aerosol can change the clouds properties;the clouds, however, affect the normal behavior of aerosol optical depth. Considerable effects arise while the interaction of aerosol and clouds unavoidably encounters the presence of greenhouse gases(GHGs) in atmosphere. This research discusses the influence of two selected aerosol types, on the clouds in Africa, over the selected sub-time series in the years 1980-2018. Sahara desert's dust is mainly constituted by hematite minerals;which, in return, is mainly composed by the iron oxides, a powerful solar and infra-red radiation absorbing matter and thus a strong and direct radiative forcing agent. For that reason, together with the fact that it is windblown over the biggest region that surrounds the desert, dust is one of the strongly considered aerosol in this research. Besides, black carbon(BC), mostly from the anthropogenic biomass burning process in the mid latitude's African savanna, is the second aerosol type selected for this research: it is one of the abundantly available aerosol types and it is one of the strongest atmospheric radiant energy absorbers. For sake of valid and trustworthy results, the data is collected from multiple satellite remote sensing tools and instruments, all targeting the aerosol-cloud interaction and effects. In this research, different measurements were carried out;those are the spatiotemporal averaged cloud cover, the aerosol(dust and BC) extinction optical thickness(AOT), the anomaly of aerosol optical depth(AAOD) as well as different scatter plots' correlation analysis. For findings: the direct influence of hydrophilic BC on clouds formation in central African sub-region is experimentally demonstrated;the dust aerosol highly influences the North African sub-region's cloud formation.

关键词： Aerosol Africa Cloud-Aerosol Interaction Anomaly of Aerosol Optical Depth

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Synergy of Binary Substitutions for Improving the Cycle Performance in LiNiO2 Revealed by Ab Initio Materials Informatics

arXiv

引用

arXiv 2020年

作者： Yoshida, Tomohiro Maezono, Ryo Hongo, Kenta Department of Computer-Aided Engineering and Development Sumitomo Metal Mining Co. Ltd. 3-5 Sobiraki-cho NiihamaEhime792-0001 Japan School of Information Science JAIST Asahidai 1-1 IshikawaNomi923-1292 Japan Computational Engineering Applications Unit RIKEN 2-1 Hirosawa SaitamaWako351-0198 Japan Research Center for Advanced Computing Infrastructure JAIST Asahidai 1-1 NomiIshikawa923-1292 Japan Center for Materials Research by Information Integration Research and Services Division of Materials Data and Integrated System National Institute for Materials Science 1-2-1 Sengen TsukubaIbaraki305-0047 Japan PRESTO Japan Science and Technology Agency 4-1-8 Honcho SaitamaKawaguchi-shi322-0012 Japan

We explore LiNiO2-based cathode materials with two-element substitutions by an ab initio simulation based materials informatics (AIMI) approach. According to our previous study, a higher cycle performance strongly correlates with less structural change during charge–discharge cycles;the latter can be used for evaluating the former. However, if we target the full substitution space, full simulations are infeasible even for all binary combinations. To circumvent such an exhaustive search, we rely on Bayesian optimization. Actually, by searching only 4% of all the combinations, our AIMI approach discovered two promising combinations, Cr-Mg and Cr-Re, whereas each atom itself never improved the performance. We conclude that the synergy never emerges from a common strategy restricted to combinations of "good" elements that individually improve the performance. In addition, we propose a guideline for the binary substitutions by elucidating the mechanism of crystal structure change. Copyright © 2020, The Authors. All rights reserved.

关键词： Binary alloys

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Electrospinning and characterization nanofibers and nano particle of Polyvinylpyrrolidone

引用

IOP Conference Series: Materials science and engineering 2020年第1期850卷

作者： C Virginia A Khasanah J Jauhari I Sriyanti Department of Electrical Engineering Universitas Sriwijaya Palembang Indonesia Laboratory of Instrumentation and Nanotechnology Applications Faculty of Computer Science Universitas Sriwijaya Palembang Indonesia Department of Physics Education Faculty of Education Universitas Sriwijaya Palembang Indonesia

Electrospinning method used to fabricate fibers both micrometers and nanometers scale. Nanofibers of Polyvinylpyrrolidone (PVP) have been developed using an electrospinning method. It is PVP acting as matrix and ethanol analyst as a solvent. We used the same concentrate of PVP I namely 10% (w/v) for three difference molecule-weight materials namely PVP 1.300.000 kg/mol (PVP-1), PVP 360.000 kg/mol (PVP-2) and PVP 40.000 kg/mol (PVP-3). The spinning process of the three molecule-weight PVP could be produced with various parameters, 0.3 flowrate, 10 kV voltage, and 12 cm needle length. Observation using a microscope shows the morphology of each solution (PVP-1), (PVP-2), (PVP-3) will generate large fibers, medium fiber, and nanofibers. The diameter of each fiber is 2620, 1760 and 1380. From the diameter analysis, we conclude that a smaller molecule-weight of PVP will obtain smaller fibers. The FTIR results give an overview of the interactions between PVP molecules that are shown against the PVP peaks. Nanofibers and nanoparticles can be applied in medicine, high-performance air filters, military and medical protective textiles, sensors, advanced composites, photo vault cells, and separation membranes. This study will show the difference form of PVP with the same concentrate for three difference molecule-weight.

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Iteration Variational Method for Solving Two-Dimensional Partial Integro-Differential Equations

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Journal of Physics: Conference Series 2020年第1期1591卷

作者： Amina Kassim Hussain Fadhel Subhi Fadhel Nursalasawati Rusli Zainor Ridzuan Yahya Mustansiriyah University Material Engineering Department 10052 Baghdad Iraq Al-Nahrain University College of Science Mathematics and Computer Applications Department 10070 Al-Jadriya Baghdad Iraq Universiti Malaysia Perlis Institute of Engineering Mathematics 02600 Arau Perlis Malysia

The two-dimensional integro-differential partial equations is one of the so difficult problems to be solved analytically and/or approximately, and therefore, a method that is efficient for solving such type of problems seems to be necessary. Therefore, in this paper, the iteration methods, which is so called the variational iteration method have been used to provide a solution to such type of problems approximately, in which the obtained results are very accurate in comparison with the exact solution for certain well selected examples which are constructed so that the exact solution exist. Main results of this work is to derive first the variational iteration formula and then analyzing analytically the error term and prove its convergence to zero as the number of iteration increases.

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