Informatics Publishing Limited

Akhil Khare ¹, D. J. Joshi ¹, M. S. Patwardhan ²

Affiliations
1 Bharati Vidyapeeth University College of Engineering, Pune, IN
2 Vishwakarma Institute of Technology, Pune, IN

Abstract

Clients need Software to be developed within few days and that too of good quality. And here lies the need for reusability, not only at code level but also at model level. This reusability can be achieved with the help of the use of Design Patterns, which further speeds up the process of product development by providing the pre-tested footsteps to follow. Design patterns show their effectiveness from design phase to maintenance. We propose that the quality of the software design can be determined by presence of Design patterns, which symbolizes good arrangement of data and control as a part of software structure. The software structure contributing to a design pattern should form a cohesive unit serving towards a single purpose and should pose less amount of coupling with the rest of the software elements. In this paper, we provide a metric based study of assessing quality of software structure by detecting the presence of the design patterns and finding the amount of cohesion and coupling of each design pattern. Higher is the quality of the used design pattern higher will be the quality of the product, with more flexibility towards change and maintenance. An early feedback at the design phase regarding software design quality would help in risk analysis as well as quality assurance.

Keywords

Software Quality, Design Pattern, Cohesion and Coupling, Object Oriented Metrics.

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Akhil Khare ¹, Shashank Sharma ¹, Sonali Goyal ¹

Affiliations
1 Department of Computer Science, JNU, Jodhpur, IN

Abstract

Augmented reality is a powerful user interface technology that augments the user’s environment with computer generated entities In this venture we investigate building indoor location based applications for a mobile augmented reality system. Augmented reality is a natural interface to visualize special information such as position or direction of locations and objects for location based applications that process and present information based on the user’s position in the real world. To enable such applications we construct an indoor tracking system that covers a substantial part of a building. It is based on visual tracking of fiducial markers enhanced with an inertial sensor for fast rotational updates This is especially problematic for mobile augmented reality systems, which ideally require extremely precise position tracking for the user’s head, but which may not always be able to achieve the necessary level of accuracy. While it is possible to ignore variable positional accuracy in an augmented reality user interface, this can make for a confusing system; for example, when accuracy is low, virtual objects that are nominally registered with real ones may be too far off to be of use. Our system uses inferencing and path planning to guide users toward targets that they choose.

Keywords

Location Aware Mobile Computing, Outdoor Augmented Reality, Hybrid Sensors, Augmenting Buildings with Infrared Information, Virtual Object Manipulation.

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Akhil Khare ¹, Meenu Kumari ¹, Pallavi Khare ²

Affiliations
1 Department of IT, Bharati Vidyapeeth, University & College of Engineering, Pune - 411 043, IN
2 Department of E & TC, SSSIST, Bhopal - 462 039, IN

Abstract

In any communication, security is the most important issue in today’s world. Lots of data security and data hiding algorithms have been developed in the last decade, which worked as motivation for our research. In this project, named “JPEG Compression Steganography”, we have designed a system that will allow an average user to securely transfer text messages by hiding them in a digital image file using the local characteristics within an image. This project is a combination of steganography and encryption algorithms, which provides a strong backbone for its security. The proposed system not only hides large volume of data within an image, but also limits the perceivable distortion that might occur in an image while processing it. This software has an advantage over other information security software because the hidden text is in the form of images, which are not obvious text information carriers. The project contains several challenges that make it interesting to develop. The central task is to research available steganography and encryption algorithms to pick the one the offer the best combination of strong encryption, usability and performance. The main advantage of this project is a simple, powerful and user-friendly GUI that plays a very large role in the success of the application.

Keywords

JPEG Compression Steganography.

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Arushi Arora ¹, Swati Priya ¹, Akhil Khare ¹

Affiliations
1 Department of Information Technology, Bharati Vidyapeeth College of Engineering, Pune - 411 043, IN

Abstract

During linked data structures(LDS) traversals, prefetching improves the performance by reducing memory latency. We will discuss about the jump pointer prefetching which hides additional load latency by using an extra pointer to prefetch objects further than a single link away. Jump pointers can be implemented in Binary tress by adding jump pointers at creation time and in LDS by adding jump pointers at traversal time. Prefetch Arrays are also used to store jump pointers. It has two approaches hardware and software. Both the approaches have highly improved the performance of prefetching with the use of jump pointers. Prefetching in pointer-based codes(java programs) is difficult because separate dynamically allocated objects are disjoint, and the access patterns are thus less regular and predictable. However, according to experimental results, the largest performance improvement is 48% with jump- pointers in java programs, but consistent improvements are difficult to obtain.

Keywords

Jump Pointers, Linked Data Structures, Software Prefetching.

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Akhil Khare ¹, Harsh Lohani ², Pallavi Khare ³

Affiliations
1 Department of Information Technology, Bharati Vidyapeeth College of Engineering, Pune, IN
2 Department of IT, BVUCOE, Pune, IN
3 Department of E&TC, SSSIST, Bhopal, IN

Abstract

The first step taken while developing software, by an analyst is to construct a sequence diagram which describes the interaction that must occur between classes. The sequence diagram does not show the interaction of classes at run time. It shows static coupling, i.e. it only acknowledges the number of interactions between the classes. There have been many studies done regarding the relationship between coupling and external quality factors of object-oriented software. A common way to define and measure coupling is through structural properties and static code analysis. However, because of polymorphism, dynamic binding, and the common presence of unused or dead code in commercial software, the resulting coupling measures are not precise as they do not perfectly reflect the actual coupling taking place among classes dynamically. This paper proposes the use of the estimated frequency of the use cases and propagates these frequencies through the sequence diagram to estimate dynamic coupling. This can be done by using Dynamic Clustering Mechanism (DCM) in which classes which interact with high frequency are clustered or grouped together (called as hot spots), which are highly dynamically coupled. With this evaluation we will be able to determine which hot spot are indeed relevant and actually deserves close attention from the designer w.r.t design of each class.

Keywords

Dynamic Coupling Measurement, DCM, Class Interaction at Run Time, Re-Engineering, Dynamic Clustering Mechanism.

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Mandeep Kaur ¹, Parul Batra ¹, Akhil Khare ²

Affiliations
1 Department of Information Technology, Bharati Vidyapeeth College of Engineering, Pune - 411 043, IN
2 Department of Information Technology, Bharati Vidyapeeth College of Engineering, Pune - 411 043, IN

Abstract

The relationships between coupling and external quality factors of object-oriented software[1] have been studied extensively for the past few years. For example, a clear empirical relationship between class-level coupling and the fault-proneness of the classes have been identified by several studies. A number of statistical techniques, principally Agglomerative Hierarchical Clustering (AHC) analysis, Byte Code Instrumentation are used to facilitate the identification of such objects. Dynamic coupling indicates the strength of association established by a connection from one software module to another at runtime. Despite the rich body of research in the field of software measurement, dynamic coupling measurement for Aspect Oriented software is still missing. A dynamic coupling measurement framework for AspectJ[10] programs is presented in this paper. The framework consists of a suite of measures for both method-level and class-level coupling relations. This paper also presents a new approach towards static analysis, in particular class analysis to the computation of dynamic coupling measures and is designed to work on incomplete programs.

Keywords

RTA, CHA, BCEL (Binary Code Engineering Library), JVM (Java Virtual Machine), Cluster Analysis.

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