Computer Science Essays

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Computer Science Essays

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Network Emulation And Architectural Design

With the advancement of Internet and hardware, testing of network applications and protocols has become very complicated and difficult job. Because WAN (Wide Area Network) links are widely different from each other in bandwidth, delay, packet loss,error and difference in downlink and uplink capacity. For instance consider the situation if an organization wish to establish connectivity among the head office and remotely located branches. A terrestrial link connection might offer low bandwidth with low latency and a satellite link might provide high bandwidth but with more delay than terrestrial link for the same cost. A leased line point to point...

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Resource Allocation In Grid Computing Environments

The aim of the paper is to correlate diverse load-balancing techniques by determining strengths and difficulties in the considered approaches and thereby propose a novel approach to balance workloads in grids. It presents a comparative study of the implementation and efficiency of various parallel concepts that are common to one or more of the considered techniques. The proposed architecture employs an intelligent queuing mechanism, a pattern based technique to determine the type of load which is crucial in bring about load balance and also incorporates a trust agent to indicate the efficiency of the resources available....

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Security Measure Designed To Secure Short Service

This project paper discusses about a security measure designed to secure the short message service of GSM which currently has no specific security in the air interfaces (between user and base station). The means of dong it is by encrypting the text messages at the end system and allowing only intended party to perceive the contents or information through the usage of same shared secret key. The algorithm chosen is Blowfish Cipher by a computer security expert Bruce Schneir. This paper is about decryption of SMS security in GSM. Most mobile operator encrypt all mobile communication data, including SMS messages...

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Wimax Femtocell Architectural Solution

WiMAX femtocell solution is a system based on WFAP and some other network functions like backhaul network and core network. Backhaul part is provided by customer’s DSL or cable broadband, FTTx connection and some ISP, whereas the core network functionalities and services are provided by core network....

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Data Transformation In Between Nodes In Ieee

Quality of Service (QoS) support in IEEE 802.11-based ad hoc networks relies on the networks’ ability to estimate the available bandwidth on a given link. However, no mechanism has been standardized to accurately evaluate this resource. This remains one of the main issues open to research in this field. This paper proposes an available bandwidth estimation approach which achieves more accurate estimation when compared to existing research. . Our scheme does not modify the CSMA/CA MAC protocol in any manner, but gauges the effect of phenomena such as medium contention, channel interference, which influence the available bandwidth, on it. Based...

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Adaptive Neuro Fuzzy Inference System

Evaluation and reasoning of students learning achievement is the process ofdetermining the . ...

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Cryptography In The Twenty First Century

The word CRYPTOGRAPHY in Greek means “Secret Writing”, which is the ancient methodology of encoding the messages so that only the dispatcher and receiver can understand them (Hingham 1999). Communication and sharing of information has become prominent these days. With the advances in technology many threats has also been increased leading to misuse of the information. Thus Cryptography which started as a modern art now has been extended its roots to every major discipline of mathematics and science. It ensures the secure transmission of data providing various additional advantageous features such as authenticity (Stallings 2006). Thus the origin and prominence...

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Web Services On Devices

Web Services on Devices (WSD) expand the existing Web services architecture to resource-constrained devices. Examples like consumer electronics, PDAs, computer peripherals and computing appliances. Web Services on Devices is one of four technologies that consist of the Network Connected Device (NCD). The four technologies are PnP-x, Function Discovery, WSD and Publication Services....

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Quick Eye Sds

The increasing use of web resources in the last years has caused a need for more efficient and useful search methods. Unfortunately, the current mechanisms to assist the search process and retrieval are quite limited mainly due to the lack of access to the document’s semantics and the underlying difficulties to provide more suitable search patterns.Although keyword-based information retrieval systems can provide a fair first approach to the overall process so far, one of the next challenges will be to carry out these kinds of tasks more precise and smarter in order to make good use of the user’s knowledge...

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Comprehensive Approach Of Wireless Data

Human-robot voice interface has a key role in many application fields. Robotics has achieved its greatest success to date in the world of industrial manufacturing. Hand gesture is a very natural form of human interaction and can be used effectively in human computer interaction (HCI). The approaches for analyzing and classifying hand gestures for HCI include glove-based techniques and vision based techniques. This paper discusses hand glove-based techniques that use sensors to measure the positions of the fingers and the position of the hand in real-time....

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Gender Human Computer Interaction And Stress

Recent research has showed that women process information and solve problems differently but some factors still have been remained unknown, regarding women and software. In this paper, I describe various factors which have impact on interaction between women and software world. Additionally, I will discuss about stress which seems that it has been ignored in recent research. Is it necessary to reduce stress level of women against software? How can we diminish stress of women while they are using computers and software?...

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Windows Xp A Line Of Operating System

Windows XP is available in many languages. In addition, MUI packs and Language Interface Packs translating the user interface are also available for certain languages. Automated teller machine (ATM) vendors Wincor Nixdorf, NCR Corporation and Diebold Incorporated have all adopted Microsoft Windows XP as their migration path from OS/2. Wincor Nixdorf who has been pushing for standardization for many years, began shipping ATMs with Windows when they first arrived on the scene....

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Purpose Of Operating System

The operating system is software which allows communication between hardware components and the software. Every electrical device considered as a computer has an operating system, starting from mobile phones, and finishing on web servers. Operating system was not available in the earliest made computers. Since 1960s computers started to be provided with this kind of software. OS gives you plenty of advantages and is very simple in use. Underneath, I have described some of its features....

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The Internet Protocol Spoofing

One technique of hacking into networks involves the spoofing of IP addresses. Write a report on how this is done and how networks can be protected against this type of attack. Make sure that you describe the way in which manipulation of certain protocols forms the basis for such attacks....

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The Security Of Wordpress

Prior to MySQL 4.1.1, MySQL used a relatively weak algorithm to encrypt passwords for website databases. While greatly improved on later versions, a large percentage of web server still use versions lower than 4.1.1. Hackers can use software known as “packet sniffers” to view the information transferred by web pages. After that, a hash could be submitted to websites such as milw0rm.com where they can be decoded within a matter of days....

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Multimedia And Digital Content

Multimedia consists of various types of media content that are used together, for example, if you have text with pictures, you are using multimedia. If you add a video or audio, you are still using multimedia. However, if the information is only audible, a person who is deaf or hard of hearing cannot use it. And if it is only visual, a blind person or someone with severe vision loss will miss the message. Therefore using multimedia, instead of single media, is so important. Multimedia content is basically what shapes the world we are living in....

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Network Computers And Thin Clients

In the network environments, most computers connected each other by different vendors or multivendor. When we connected in multivendor, there are many problems as we must match in server’s operating system, client’s operating system and redirectors. If they are not match, it will course many problems. Administrator solves these problems. As one of the biggest jobs of network administrator contains to solve problems when connecting computers that use different vendor of network operating systems....

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Three Major Categories Of Software

Software can be divided into three major categories according to popularity: application software, system software, and web applications. Within each category there are dozens, if not hundreds, of specialized software types, but for the purpose of this study, we will concentrate on the most popular software type of each category....

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Diploma In Information And Communication

Computer and internet both bring lots of benefit to every human . Some using them to work , some for entertainment , some for researching and lots more . Every internet activity has to progress through either Mozilla Firefox or Internet Explorer . These two browser software play a very important role and the bridge to link between the computer and the internet world ....

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An Overview Of Servlets And Jsp Technology

JDBC is a front-end tool for connecting to a server and is similar to ODBC however, JDBC can connect only Java client and it uses ODBC for the connectivity. JDBC is essentially a low level application programming interface. It is called a low level API since any data manipulation, storage and retrieval has to be done by the program itself. Some tools that Provide a higher level of abstraction is expected shortly....

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Developed Hierarchical Network Model

Please note that in this design we used single IP address for web server, mail server and users' web browsing using PAT. ...

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Online Communications Among The Mmu Community

For my project, I add some features that easy and simple for user to use the online communications systems that are friendly used. The features are easy to understand and used by the user. Some of the features is the interface are friendly user, chatting, sending files and online forums....

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Network Security Weaknesses

Describe the main weaknesses of wireless networks and explain how these can be compromised. ...

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Ntroduction To Mobile Ad Hoc Networks

The mobile ad-hoc networks are identified as to be the most important technologies for the 21st century. There is significant increase in wireless internet users in recent years. The evolution of second and third generation of wireless has incorporated the features. In 1970s era, computing and communication were considered to be different fields but in modern computing environment the conditions are totally reversed both these field are considered as the building block for a network. The modern day computing is mainly consists of two major components i.e. distributed applications and the networking infrastructure. The technical challenges in the development of...

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About Internet

During the last decade, the number of the internet users dramatically increased ...

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Real Time Video Streaming Modules

Due to the high-resolution pixel required and high speed network connection, video conferencing modules should be improved to satisfied the current technology and also nowadays user who request for the high-resolution video conference....

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An Analysis Of Design Algorithm Visualizations

There are many algorithm visualizations being developed, but the designers of these visualization systems do not clearly specify their intention to support a particular task [Petre et al. 98]. The designing phase requires not only a creative mind, but also a very good working knowledge of any design framework for animation. According to Sami Khuri [32], visualizations can be used by all types of users in all kinds of tasks. But, there is no perfect algorithm visualization that universally satisfies all the requirements. A successful visualization should also consider the design issues like impressive representation and presentation, environmental factors, design...

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The Android Application Pedotrac

Pedotrac is a health and fitness application for android based phones, which has elegant features and also a fun way of maintaining fitness right through the android phones. This application lets the user to track his daily weight loss, calories burnt; distance covered by the user and also tracks the path or route of his/her walk....

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Smart Card Software And Operating System

An operating system enables smart cards in performing data processing functions such as basic arithmetic operations, encryption etc. A non volatile memory in the smart card stores an operating system. The operating system found on the majority of smart cards implements a standard set of commands (usually 20 - 30) to which the smart card responds. Smart card standards such as ISO 7816 and CEN 726 8 describe a range of commands that smart cards can implement. Most smart card manufacturers offer cards with operating systems that implement some or all of these standard commands (and possibly extensions...

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Study And Overview Of Relational Database Management

When organizations are looking for a more accurate way to present their records they use systems and software that have the capability of retrieving these records. The retrieval of these records can provide managers with the information they need to compare against their competitors. The interpretation of these records is critical if the organization is trying to increase the amount of revenue they are receiving. Database administrator ensures that when organizations are retrieving their data that no records are duplicated. The duplication of records can cause confusion and possible incorrect figures appearing on data sheets....

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Rapid Deployment Of Wireless Transceivers

Wireless LAN networks can be classified into two categories. The first and most common is infrastructure networks with fixed and wired gateways (wireless network built on-top of a wired network). In this kind of networks mobile nodes connect to a network via an AP (Access Point) which is within its coverage range in a single hop communication technique. The second type of wireless network is the infrastructure-less mobile network, this commonly known as mobile ad hoc network (MANET) as in figure... shows example of the two kinds, In MANET nodes can communicate directly, nodes operate both as router and host,...

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Analysis On Data Communication And Networking

The literature review is my brief analysis on the Data Communication and Networking, Network Security, Denial of Service attacks, with complete analysis on Dos attacks on network layers and analysis of Distributed Denial of Service Attacks on Application Layers for complete understanding towards attcks,types of attacks and to provide a better solution for Distributed Denial of Service attack....

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Cognitive Radio Technology Wireless Innovation

Abstract: Wireless industry as compared to the wired, is making rapid strides and is still very much in demand; therefore the value of the radio frequency spectrum used in wireless communications is reaching astronomical figures. There is a need for better spectrum managing network design because the bands are free 94% of the time but there is no adequate spectrum managing network that can use a particular band when no services are operating in it [1]. Cognitive Radio (CR) technology has attracted global attention for its potential to deal with the problem of spectrum scarcity. Firstly, the paper describes...

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Development Of Chip For Impact Source Determination

There has been great increase in interest in impact source determination. Source determination is one of the major problems in the fields like army and other part of industry. The idea Impact source determination is to identify the source from which the impact has been given. By knowing the source and appropriate action can be taken in the real time. This will help in the researches to know about the circumstances of any impact by any particular source. It will also help in testing the material before it can be sent to the market. There are various algorisms by...

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The Current Trends In Computer Hardware Platforms

Mobile platform: more and more business computing is moving from PCs and desktop machines to mobile devices like cell phones and smartphones. Data transmissions, Web surfing, e-mail and instant messaging, digital content displays, and data exchanges with internal corporate systems are all available through a mobile digital platform. Netbooks, small low-cost lightweight subnotebooks that are optimized for wireless communication and Internet access, are included....

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