Paper Title

MATHEMATICAL ANALYSIS OF SYSTEM RELIABILITY USING MARKOV CHAINS

Abstract

In contrast, the solution of the mathematical models developed in this study requires relatively insignificant computer time while achieving high prediction accuracies. This facilitates the need for software tools such as Relex Software to handle the systems’ reliability. Many engineering systems are subject to failure after a given amount of time, and just how long a system will not fail depends on its design. Thus, a client of the Statistical Consulting Collaboratory requested an analysis of the reliability of his telecommunications system. One very useful useful technique in finding the reliability of a system is Markov modeling. This technique involves analytically finding the probability of the system being in each of its potential states, and when summed appropriately these state probabilities lead to the overall reliability of a system. However, for systems with a large number of states, solving for the reliability becomes increasingly tedious and complex. The most common method currently utilized in practice for handling the reliability predictions of systems having components with non constant failure rates are based on Monte Carlo Simulations. However, to obtain the required high accuracies for moderately complex system reliability models, Monte Carlo Simulations may require excessive computer time.
KEYWORDS : Markov chain, probability, Markov modeling, Monte Carlo, Relex Software.

Paper Title

DESIGN AND ANALYSIS OF A COMMUNICATION NETWORK USING NETWORK SIMULATOR

Abstract

In the network research area, establishing of network in a real time scenario is very difficult. A single test bed takes a large amount of time and cost. So implementation of a whole network in real world is not easily possible and very costly to. The simulator helps the network developer to check whether the network is able to work in the real time. Thus both the time and cost of testing the functionality of network have been reduced and implementations are made easy. In this paper, we introduce the main features of different simulator and consider their advantages and disadvantages. We hope this survey prove to be a good reference source for those people who feel difficult to select the appropriate network simulators for their research. In the comprehensive computer network’s research area, it is very expensive to design a whole network, without the simulation process because, if we design with actual equipment’s, then it may be very expensive and take more time. So by the help of network simulation tools, we can create cost effective and time saving scenario. Different types of wire and wireless networks, can be deployed by the help of, simulation tools. Computer network simulators are also useful, in allowing the network designers, to test new networking protocols or, to change the existing protocols, or create its own protocols in a controlled and reproducible approach. In this paper, we have presented the comprehensive survey, on current network simulators like Net Sim, OPNET, NS-2, NS-3, OMNeT++, REAL, J-Sim and QualNet. This paper is a comprehensive reference source, for those who feel the difficulty, to select the appropriate network simulators, for their research requirements, based on advantage and disadvantage of various network simulators. We will be introducing an overview of ns2, its installation in Kubuntu 14.04 and its scripting
KEYWORDS : Network Simulator, NS2 , NS3 , OPNET, NetSim, OMNeT++, REAL, J-Sim and QualNet. Computer Network, Simulator, Ns-2, TCL & OTCL, Kubuntu 14.04.

Paper Title

IMPACT OF AVIATION ON GLOBALIZATION

Abstract

The study aims at investigation of the impact of globalization on operational and financial performance of European airlines before pandemics. The impacts of globalization on national and international policy making processes are illustrated by an examination of the effects on air transport industries. Trends towards the liberalization of air transport activities have been noted in many countries, mainly, to date, those of developed or rapidly developing status. Airline industry is very important for modern society as the biggest player in the globalization process by connecting regions, promoting global trade and tourism, facilitating economic and social development. However, here is a lack of research on relationship between globalization and airline industry in India. It remains unclear how to measure the impact of globalization on performance of airline companies and industry. The study examines trends towards the privatization of airline companies in the context of (a) the development of so-called global ‘alliances’ or ‘partnerships’ and (b) liberalization at regional level and within trade groups such as the European Union. The new challenges of the General Agreement on Trade in Services (GATS) are considered, especially in terms of how developing countries can develop appropriate policies in response to the forces of globalization, increasing liberalization and competition.
KEYWORDS : Globalization, air transport industries, General Agreement on Trade in Services (GATS), Airline industry, Aviation, tourism industry.

Paper Title

A REVIEW PAPER ON CRYPTOGRAPHY AND NETWORK SECURITY

Abstract

With the rise of the World Wide Web and the proliferation of e-commerce platforms and social networks, organizations worldwide are generating vast volumes of data on a daily basis. With the explosively increasing internet that has been merging with our lives for the past few decades, data and network security has been of greatest importance as society moves towards the age of digital information. As the number of users connected to the web increases, the threat faced by the network because of attackers also increases. Cryptography, the science of information security derived from the inherent needs of humans to converse and share information or communicate selectively at times, has the primary function of sending correct data over the network without any undesirable modifications. In cryptography, the original message is masked or encrypted by the sender and has to be decoded or decrypted by the receiver using a predefined set of algorithms decided before the commencement of the data transmission. Thereby, successfully avoiding redundant people from accessing or understanding the message as it is converted to content unreadable by the human eye. This paper aims to provide an overview of network security and explore various techniques for enhancing it, particularly focusing on cryptography.
KEYWORDS : Security, Vulnerabilities, Cryptographic Methods, Encoding, Deciphering

Paper Title

EFFECT OF RICE HUSK ASH AND LECA ON THE FRESH AND FLEXURAL STRENGTH OF LIGHTWEIGHT CONCRETE

Abstract

India, being one of the largest rice-producing nations, generates vast amounts of rice husk as agricultural waste. When rice husk is burned for energy production or disposal, it results in rice husk ash (RHA), a byproduct that poses significant environmental challenges due to improper disposal. At the same time, the global demand for cement continues to rise, contributing to high energy consumption and increased carbon emissions. To mitigate these environmental concerns, researchers are exploring sustainable alternatives by incorporating industrial byproducts like RHA as supplementary cementitious materials in concrete. Utilizing RHA not only aids in effective waste management but also enhances the properties of concrete, making it a viable solution for sustainable construction. Lightweight concrete has gained importance in modern construction due to its reduced density, improved thermal insulation, and enhanced durability compared to conventional concrete. One of the widely used lightweight aggregates is Light Expanded Clay Aggregate (LECA), which is known for its low density and high strength. This study investigates the fresh-stage properties and flexural strength of lightweight concrete by incorporating LECA as a partial replacement for coarse aggregate and RHA as a partial replacement for cement. The research evaluates the workability, density, and setting time of the fresh concrete mix while assessing flexural performance at the hardened stage. A series of experimental investigations are conducted to analyze how these modifications influence the overall mechanical properties of concrete. The results of this study provide insights into optimizing lightweight concrete mixtures for structural applications, promoting sustainability, and reducing dependency on conventional materials without compromising performance.
KEYWORDS : Rice Husk Ash, LECA, Mineral Admixture, Light Weight Aggregate.