Informatics Publishing Limited

P. Chenna Reddy ¹

Affiliations
1 Computer Science and Engineering, JNTUA College of Engineering, Pulivendula, YSR District, A.P., IN

Abstract

Engineering education is given significant importance in India. A fundamental component of a computer science and engineering curriculum is computer programming and is generally studied at first year under-graduation. It is not only a difficult course but is the basic course which can affect the student prospects in the entire engineering program. It places the student in a groove and enables him to move along the correct path. Unfortunately engineering education in India is going through a turbulent period and there is need to correct it. Programming is a subject which has become essential across the disciplines. This paper analyses the reasons for the difficulties experienced by first year programming students, reviews current methods of teaching programming, identifies effective ways of teaching programming, and provides guidelines to fine tune teaching programming to individual requirements. It assumes Indian environment.

Keywords

Engineering, Programming, Undergraduation, Teaching, Syllabus.

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C. Sreedhar ¹, N. Kasiviswanath ¹, P. Chenna Reddy ²

Affiliations
1 Department of Computer Science and Engineering, G Pulla Reddy Engineering College, Kurnool - 518007, Andhra Pradesh, IN
2 Department of Computer Science and Engineering, JNT University Anantapur, Anantapuram - 515002, Andhra Pradesh, IN

Abstract

Objectives: In this paper, we discuss on the importance of multilevel queues in scheduling Hadoopmapreduce jobs. Methods/Statistical Analysis: Modifications are done on HDFS and yarn configuration files to suit the multilevel queues. This work constitutes the performance analysis of various existing job schedulers such as FIFO, Fair and Capacity schedulers. Findings: Significant achievements are achieved which includes performance evaluation metrics for comparative understanding of the proposed and existing techniques. The final outcome of the work demonstrates the need for multilevel queue scheduling with allocation policies and the optimal placement of jobs in queues. Application/Improvements:With the adoption of multilevel queue scheduling, there is a significant improvement in placing jobs in multilevel queues for the jobs submitted by the users.

Keywords

Capacity, Fair, FIFO, Hadoop, Mapreduce, Multilevel Queues.

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M. Durga Prasad ¹, P. Chenna Reddy ², Banoth Samya ³

Affiliations
1 Department of CSE, Vijay Institute of Tech and Sciences, AP, IN
2 Department of CSE, JNTUCE, Pulivendula, Y.S.R Dist, AP, IN
3 Department of CSE, Vijay College of Engineering for Women, AP, IN

Abstract

We have many of anonymizing networks which provide users to access services of server anonymously. Anonymity has received increasing attention in the literature due to user awareness of their privacy. Nowadays, anonymity provides protection to users to enjoy network services without being traced. Anonymizing networks such as Tor allow users to access Internet services privately by using a series of routers to hide the client's IP address from the server. Web site administrators routinely rely on IPaddress blocking for disabling access to misbehaving users, but blocking IP addresses is not practical if the abuser routes through an anonymizing network. As a result, administrators block all known exit nodes of anonymizing networks, denying anonymous access to misbehaving and behaving users alike. To address this problem Nymble is developed, a system in which servers can "blacklist" misbehaving users. We present extensions to nymble framework for anonymizing blacklisting schemes. First, we provide a mechanism to nymble manager to track blacklisting of user in multiple linking windows while preserving anonymity of the users. Some users always look to misbehave with servers; there major intention is to make the server down. The problem with nymble is nymble manager blacklist a user for one likability window (i.e. 1 day), on the other day again he can misbehave with same server or other server. He can continue it as his everyday activity as Nymble manager doesn't have any mechanism to identify such type of users while preserving anonymity. To address this problem, we present a method which can identify such users, while preserving anonymity and nymble manager with identified information can decide upon how much time to blacklist a misbehaving user. We also suggest some algorithms which are changed in comparison to existing nymble.

Keywords

Anonymous Blacklisting, Anonymous Tracking, Privacy, Nymble, Pseudo Tracker.

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V. Lokeswara Reddy ¹, A. Subramanyam ², P. Chenna Reddy ³

Affiliations
1 Department of CSE, K.S.R.M. College of Engg., Kadapa, A.P., IN
2 Dept. of CSE, AITS, Rajampet, Y.S.R. (Kadapa) Dist., A.P., IN
3 Dept. of CSE, JNTUCE, Pulivendula, Y.S.R. (Kadapa) Dist., A.P., IN

Abstract

Steganography is derived from the Greek word steganos which literally means “Covered” and graphy means “Writing”, i.e. covered writing. Steganography refers to the science of “invisible” communication. For hiding secret information in various file formats, there exists a large variety of steganographic techniques some are more complex than others and all of them have respective strong and weak points. The Least Significant Bit (LSB) embedding technique suggests that data can be hidden in the least significant bits of the cover image and the human eye would be unable to notice the hidden image in the cover file. This technique can be used for hiding images in 24-Bit, 8-Bit, Gray scale format. This paper explains the LSB Embedding technique and Presents the evaluation for various file formats.

Keywords

Steganography, Least Significant Bit (LSB), GIF, PNG, BMP.

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