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arXiv 2018年

作者： Jain, Satvik Buduru, Arun Balaji Chhabra, Anshuman Dept. of Computer Engineering Netaji Subhas Institute of Technology University of Delhi New Delhi India Dept. of Computer Science IIIT Delhi New Delhi India Dept. of Computer Science University of California Davis United States

Cloud infrastructures are being increasingly utilized in critical infrastructures such as banking/finance, transportation and utility management. Sophistication and resources used in recent security breaches including those on critical infrastructures show that attackers are no longer limited by monetary/computational constraints. In fact, they may be aided by entities with large financial and human resources. Hence there is urgent need to develop predictive approaches for cyber defense to strengthen cloud infrastructures specifically utilized by critical infrastructures. Extensive research has been done in the past on applying techniques such as Game Theory, Machine Learning and Bayesian Networks among others for the predictive defense of critical infrastructures. However a major drawback of these approaches is that they do not incorporate probabilistic human behavior which limits their predictive ability. In this paper, a stochastic approach is proposed to predict less secure states in critical cloud systems which might lead to potential security breaches. These less-secure states are deemed as 'risky' states in our approach. Markov Decision Process (MDP) is used to accurately incorporate user behavior(s) as well as operational behavior of the cloud infrastructure through a set of features. The developed reward/cost mechanism is then used to select appropriate 'actions' to identify risky states at future time steps by learning an optimal policy. Experimental results show that the proposed framework performs well in identifying future 'risky' states. Through this work we demonstrate the effectiveness of using probabilistic modeling (MDP) to predictively secure critical cloud infrastructures. Copyright © 2018, The Authors. All rights reserved.

关键词： Critical infrastructures

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An Efficient Biometric based three-factor authentication scheme for Wireless Sensor Network

An Efficient Biometric based three-factor authentication sch...

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International Conference on Advances in Computing, Communication Control and Networking

作者： Deepti Singh Bijendra Kumar Samayveer Singh Satish Chand Computer Engineering Department Netaji Subhas Institute of Technology Computer Engineering Department Bennett University Greater Noida School of computer and system sciences Jawaharlal Nehru University

ISBN: (纸本)9781538641200

In wireless sensor network, for some applications users are attracted in real time data. This can be done, if users directly interact with sensor node. For security reasons, user needs to get authorized to base station and sensor node both. In this paper, we design an efficient biometric based authentication scheme. We have done informal and formal security analysis of our scheme and have proved that our scheme is secure against active and passive adversaries. The performance with respect to storage, communicational cost and running time of our scheme is also compared with other related schemes.

关键词： Wireless sensor networks User authentication Smartcard Biometric Formal verification AVISPA

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Multi-Response Optimization of Fused Deposition Modelling Process Parameters of ABS Using Response Surface Methodology (RSM)-Based Desirability Analysis

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Materials Today: Proceedings 2017年第2期4卷 1972-1977页

作者： Manu Srivastava Sachin Maheshwari TK Kundra Sandeep Rathee Division of Manufacturing Processes and automation Engineering Netaji Subhas Institute of Technology New Delhi India. Department of Mechanical Engineering Indian Institute of Technology New Delhi India

The basic efforts of this investigation are focused on the development of an optimal layout plan with minimal build time, model material volume, support volume and thus production cost for a Fortus 250mc modeler. ABS plastic is used as a raw material and cylindrical primitives with pre specified STL dimensions are taken as the component. This study focuses on multi response optimization of layout plan for different FDM parameters as well as spatial orientations. Experiments are conducted using full factorial central composite design. Response surface methodology based desirability analysis was employed for optimization of FDM process parameters namely, contour width, raster width, air gap, raster angle, slice height and orientation based on multiple performance characteristics including build time, model material volume and support material volume. Mathematical models were developed and tested for accuracy using DesignExpert software for RSM application. The results thus obtained are further processed using Desirability approach for multi objective optimization in order to achieve overall layout optimization for quantitative characteristics.

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Effect of Particulate Filler on Mechanical Properties of Polyester based Composites

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Materials Today: Proceedings 2017年第9期4卷 9893-9897页

作者： Vijay Chaudhary Akash Kumar Rajput Pramendra Kumar Bajpai Division of Manufacturing Process and Automation Engineering Netaji Subhas Institute of Technology Sec-3 Dwarka New Delhi India

Fiber reinforced plastics (FRPs) are acquiring its place in almost every application area where conventional materials are used. The present study describes the mechanical characterization (impact strength and flexural strength) of glass, carbon and glass-carbon hybrid fiber reinforced polyester hybrid composites with and without particulate filler. The composites were developed using conventional hand lay-up technique. Attempts have been made to explore the possible use of SiC as filler material in these composites. Effect of reinforcing different percentage of silicon carbide particles on mechanical properties of the developed hybrid composites has been studied. The results have been compared with and without filler materials. The study concludes that reinforcing filler material has strong effect on the mechanical performance of the developed composites.

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A New Image Steganography Technique Based on Pixel Intensity and Similarity in Secret Message

A New Image Steganography Technique Based on Pixel Intensity...

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International Conference on Advances in Computing, Communication Control and Networking

作者： Aruna Malik Rajeev Kumar Samayveer Singh School of Computing Science & Engineering Galgotias University Gr Noida UP India Division of Computer Engineering Netaji Subhas Institute of Technology New Delhi India Department of Computer Science Engineering Bennett University Gr Noida UP India

ISBN: (纸本)9781538641200

In this paper, we propose a new enhanced image steganography scheme for color images. The proposed scheme is based on the pixel intensity of the cover image and the similarity in secret message. It can hide the secret text data into the color or gray scale images. In this scheme, we try to exploit the characteristic of the secret data which is the closeness in its basic elements. We firstly preprocess the secret data that is to be hidden;then the resultant secret data is embedded into the LSBs of the cover image according to intensity values of the pixels in cover image. In preprocessing, we actually divide the secret data into clusters in a sequential manner and then the basic information about each cluster such as its size, its minimum value and the cluster itself are embedded. The preprocessing reduces the size of the secret data significantly which helps in improving the quality of the stego-image. The security of this method also increases because of the preprocessing as the actual data is not embedded.

关键词： Steganography Cluster analysis Difference-Value PSNR

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Assessing the role of participants in evolution of topic lifecycles on social networks

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Computational Social Networks 2018年第1期5卷 6页

作者： Dey, Kuntal Kaushik, Saroj Garg, Kritika Shrivastava, Ritvik IBM Research Vasant Kunj New Delhi 110070 India Department of Computer Science and Engineering Indian Institute of Technology Delhi New Delhi 110016 India Department of Information Technology Ch. Brahm Prakash Govt. Engineering College New Delhi 110073 India Department of Information Technology Netaji Subhas Institute of Technology New Delhi 110078 India

Background: Topic lifecycle analysis on social networks aims to analyze and track how topics are born from user-generated content, and how they evolve. Twitter researchers have no agreed-upon definition of topics;topics on Twitter are typically derived in the form of (a) frequently used hashtags, or (b) keywords showing sudden trends of large occurrence in a short span of time (“bursty keywords”), or (c) concepts latent within the tweets that are grouped using variations of semantic clustering techniques. Methods: In the current paper, we jointly model the hashtags present and the semantic concepts embedded in the content, which in turn helps us identify hashtag groups that define a “topic”—a concept space—that are used by a large number of tweets. Results: We observe that different hashtags belonging to a given cluster are more prominent compared to the others, at different times. We further observe that the participation and influence levels of the different users play important roles in determining which hashtag would be more prominent than the others at given times. We thus observe topics to often morph from one to the other (via morphing of dominant hashtags representing the same semantic concept space), rather than becoming extinct outright, which is a novel insight about topic lifecycles. We further present novel observations about the role of users in determining the lifecycle of discussion topics on Twitter. Conclusions: We infer that topic lifecycles are governed by user interests, and not by user influence, which is a key observation made by our work. © 2018, The Author(s).

关键词： Evolution of social topics Semantic clusters of hashtags as Twitter topics Twitter topic lifecycle User influence in topic evolution

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Analysis of Microstructural Changes in Enhancement of Surface Properties in Sheet Forming of Al alloys via Friction Stir Processing

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Materials Today: Proceedings 2017年第2期4卷 452-458页

作者： Sandeep Rathee Sachin Maheshwari Arshad Noor Siddiquee Manu Srivastava Division of Manufacturing Processes and Automation Engineering Netaji Subhas Institute of Technology New Delhi India Department of Mechanical Engineering Jamia Millia Islamia University New Delhi India

Weight reduction is one of the major objectives in engineering design and manufacturing, especially in automotive and aircraft industries. Aluminium (Al) alloys provide the solution for weight reduction in various structural applications. Forfurther enhancement ofsurface properties of these alloys, their surface composites are fabricated which exhibit high strength - weight ratio, better corrosion resistance, improved mechanical & wear properties as compared to base alloys. In this work, an attempt has been made to enhance the processed-layerhardness of AA 6063 sheets by synthesizing AA 6063/SiC surface composites using friction stir processing (FSP). Single pass FSP was performed on AA 6063 sheets using tool rotational speedat three levels of 900, 1120and 1400 rpm *** speed was maintained at a constant level of 40 millimetres/minute and tool tilt angle was kept at 2˚. Optical microscopy was employed for observing microstructureof fabricated composites. Uniform distribution of SiC particles in the metal matrix was *** Combination of 1120 rpm, 40 mm/min and 2˚ gave most homogeneous distribution and highest microhardness of 87 Hv. No interfacial reaction was observed between the aluminium matrix and SiC particles.

关键词： Aluminiumalloy Friction stir processing SiC Microstructure Microhardness rotational speed

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A study on different configurations of fractional order fuzzy logic controller scheme for robotic manipulator using NSGA-II

A study on different configurations of fractional order fuzz...

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IEEE India International Conference on Power Electronics

作者： Richa Sharma Deepak Joshi Prerna Gaur Centre for Biomedical Engineering Indian Institute of Technology Delhi New Delhi India Centre for Biomedical Engineering All India Institute of Medical Sciences New Delhi India Instrumentation and Control Engineering Division Netaji Subhas Institute of Technology Delhi India

ISBN: (纸本)9781538649978;9781538649961

In this paper, the performance and design analysis of two different configurations of fractional order fuzzy logic controller (FLC) schemes are investigated for two-link planar robotic manipulator plant. The plant under consideration is carrying a payload which is varying with time. The scaling gains of FLC and the other parameters of controller are obtained using an efficient multi-objective optimization technique named as non-dominating sorted genetic algorithm-II (NSGA-II). Two different performance/objective functions are chosen for minimization to witness trade-off between them and to obtain better closed loop response. Using the MATLAB/Simulink platform for simulation, the performance of the proposed controller techniques are compared with the fractional version of PID (FOPID) and traditional Proportional-Integral-Derivative (PID) controller. For the robustness testing, the results for the disturbance rejections are presented for all the control schemes.

关键词： Robotic manipulator Fractional order Fuzzy logic controller PID Multi-objective optimization

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Comparative analysis of different methods of model order reduction for linear, time-invariant systems 1

Comparative analysis of different methods of model order red...

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1st IEEE International Conference on Power Electronics, Intelligent Control and Energy Systems, ICPEICES 2016

作者： Jha, S.K. Singhal, Shivam Gupta, Sanchit Division of Instrumentation and Control Engineering Netaji Subhas Institute of Technology Delhi India

ISBN: (纸本)9781467385879

In this paper, to ind a lower order model equivalent to a given higher order system, a simple method based on T.C Hsia's approximation method is proposed. To examine the accuracy of the proposed method, it is compared with the Hutton and Friedland's approach which uses α and β parameters. To demonstrate the correctness and efficacy of the proposed method, a fourth order system is reduced to first and second order using both the methods. The various performance indices of the reduced systems, obtained from the graphs plotted in Matlab platform are compared and analysed. © 2016 IEEE.

关键词： Invariance

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Preface

Lecture Notes on Data Engineering and Communications Technol...

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Lecture Notes on Data engineering and Communications Technologies 2018年 18卷 v-vi页

作者： Woungang, Isaac Dhurandher, Sanjay Kumar Department of Computer Science Ryerson University TorontoON Canada CAITFS Division of Information Technology Netaji Subhas Institute of Technology University of Delhi New Delhi India

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