Free Seminar topics for Students and Research

wireless Lan security implementation

2011-08-04T09:03:00.000-07:00

One issue with corporate wireless networks in general, and WLANs in particular, involves the need for security. Many early access points could not discern whether or not a particular user had authorization to access the network. Although this problem reflects issues that have long troubled many types of wired networks (it has been possible in the past for individuals to plug computers into randomly available Ethernet jacks and get access to a local network), this did not usually pose a significant problem, since many organizations had reasonably good physical security. However, the fact that radio signals bleed outside of buildings and across property lines makes physical security largely irrelevant to Piggybackers. Such corporate issues are covered in wireless security

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Wireless USB from the USB-IF

2011-08-04T08:54:00.000-07:00

With more than 2 billion legacy wired USB connections in the world today, USB is the de facto standard in the personal computing industry. Soon, these same, fast, interoperable connections will become available in the wireless world, with the introduction of Wireless USB from the USB-IF. Wireless USB is the new wireless extension to USB that combines the speed and security of wired technology with the ease-of-use of wireless technology. Wireless connectivity has enabled a mobile lifestyle filled with conveniences for mobile computing users. Wireless USB will support robust high-speed wireless connectivity by utilizing the common WiMedia MB-OFDM Ultra-wideband (UWB) radio platform as developed by the WiMedia Alliance.

UWB technology offers a solution for high bandwidth, low cost, low power consumption, and physical size requirements of next-generation consumer electronic devices.

* Wireless USB is the first high-speed wireless personal interconnect technology to meet the needs of multimedia consumer electronics, PC peripherals, and mobile devices.
* Wireless USB will preserve the functionality of wired USB while also unwiring the cable connection and providing enhanced support for streaming media CE devices and peripherals.
* Wireless USB performance is targeted at 480Mbps at 3 meters and 110Mbps at 10 meters.

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Wireless USB advantages and disadvantages

2011-08-04T08:29:00.000-07:00

Wireless USB is a short-range, high-bandwidth wireless radio communication protocol created by the Wireless USB Promoter Group. Wireless USB is sometimes abbreviated as "WUSB", although the USB Implementers Forum discourages this practice and instead prefers to call the technology "Certified Wireless USB" to differentiate it from competitors. Wireless USB is based on the WiMedia Alliance's Ultra-WideBand (UWB) common radio platform, which is capable of sending 480 Mbit/s at distances up to 3 meters and 110 Mbit/s at up to 10 meters. It was designed to operate in the 3.1 to 10.6 GHz frequency range, although local regulatory policies may restrict the legal operating range for any given country.

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what is xml ? methodology of xml

2011-08-04T08:06:00.000-07:00

As a large quantity of information is represented in XML format on the Web, there are increasing demands for XML security. Until now research on XML security has been focused on the security of data network using digital signature and encryption technology. As XML data become extensive and complex, however, XML security comes to involve not only network security but also managerial security. But XML encryption support only simple network security. So it cannot support multiple users and multiple access control policy. In this paper, an integration method of encryption and access control policy for securing XML documents is proposed. This methodology can support multiple authorizations of multiple users with integrating access control.

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Unix Millennium Bug or 2038 problem

2011-08-04T07:54:00.000-07:00

The year 2038 problem (also known as the Unix Millennium Bug, Y2K38, Y2.038K, or S2G by analogy to the Y2K problem) may cause some computer software to fail at some point near the year 2038. The problem affects all software and systems that both store system time as a signed 32-bit integer, and interpret this number as the number of seconds since 00:00:00 UTC on Thursday, 1 January 1970.[1] The farthest time that can be represented this way is 03:14:07 UTC on Tuesday, 19 January 2038.[2] Times beyond this moment will "wrap around" and be stored internally as a negative number, which these systems will interpret as a date in 1901 rather than 2038. This is caused by Integer overflow. The counter "runs out" of usable digits, "increments" the sign bit instead, and reports a maximally negative number (continuing to count up, towards zero). This will likely cause problems for users of these systems due to erroneous calculations.

Further, while most programs will only be affected in or very close to 2038, programs that work with future dates will begin to run into problems much sooner. For example, a program that works with dates 20 years in the future will have to be fixed no later than in 2018.

Because most 32-bit Unix-like systems store and manipulate time in this format, it is usually called Unix time, and so the year 2038 problem is often referred to as the Unix Millennium Bug. However, any other non-Unix operating systems and software that store and manipulate time this way will be just as vulnerable.

Code division multiple access (CDMA)

2011-07-12T10:13:00.000-07:00

ABSTRACT

Code division multiple access (CDMA) is a channel access method used by various radio communication technologies. It should not be confused with the mobile phone standards called cdmaOne and CDMA2000 (which are often referred to as simply CDMA), which use CDMA as an underlying channel access method.

One of the basic concepts in data communication is the idea of allowing several transmitters to send information simultaneously over a single communication channel. This allows several users to share a band of frequencies (see bandwidth). This concept is called multiple access. CDMA employs spread-spectrum technology and a special coding scheme (where each transmitter is assigned a code) to allow multiple users to be multiplexed over the same physical channel. By contrast, time division multiple access (TDMA) divides access by time, while frequency-division multiple access (FDMA) divides it by frequency. CDMA is a form of spread-spectrum signalling, since the modulated coded signal has a much higher data bandwidth than the data being communicated.

An analogy to the problem of multiple access is a room (channel) in which people wish to talk to each other simultaneously. To avoid confusion, people could take turns speaking (time division), speak at different pitches (frequency division), or speak in different languages (code division). CDMA is analogous to the last example where people speaking the same language can understand each other, but other languages are perceived as noise and rejected. Similarly, in radio CDMA, each group of users is given a shared code. Many codes occupy the same channel, but only users associated with a particular code can communicate.

BitTorrent is a peer-to-peer file sharing protocol free seminar topic

2011-07-05T09:15:00.000-07:00

Abstract

BitTorrent is a peer-to-peer file sharing protocol used for distributing large amounts of data.[vague] BitTorrent is one of the most common protocols for transferring large files, and it has been estimated that it accounted for roughly 27% to 55% of all Internet traffic (depending on geographical location) as of February 2009.

Programmer Bram Cohen designed the protocol in April 2001 and released a first implementation on July 2, 2001.It is now maintained by Cohen's company BitTorrent, Inc. There are numerous BitTorrent clients available for a variety of computing platforms.

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Beowulf (computing) free seminar topic | seminar title

2011-07-05T09:05:00.000-07:00

Abstract

A Beowulf cluster is a computer cluster of what are normally identical, commercially available computers, which are running a free and open source software (FOSS), Unix-like operating system, such as BSD, Linux, or Solaris. They are networked into a small TCP/IP LAN, and have libraries and programs installed which allow processing to be shared among them. Originally referring to a specific computer built in 1994 by Thomas Sterling and Donald Becker at NASA, Beowulf systems similar to the original NASA system are now deployed worldwide, chiefly in support of scientific computing. They are high-performance parallel computing clusters of inexpensive personal computer hardware. The name comes from the main character in the Old English poem Beowulf, which was bestowed by Sterling because the epic poem describes Beowulf as having "thirty mens' heft of grasp in the grip of his hand."
There is no particular piece of software that defines a cluster as a Beowulf. Commonly used parallel processing libraries include Message Passing Interface (MPI) and Parallel Virtual Machine (PVM). Both of these permit the programmer to divide a task among a group of networked computers, and collect the results of processing. Examples of MPI software include OpenMPI (OpenMPI) or MPICH (MPICH). There are additional MPI implementations available

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Asynchronous on-chip networks Free seminar topic | seminar title

2011-07-05T09:03:00.000-07:00

Abstract

Various kinds of asynchronous interconnect and synchronisation mechanisms are being proposed for designing low power, low emission and high-speed SOCs. They facilitate modular design and possess greater resilience to fabrication time inter-chip and run-time intra-chip process variability. They can provide a solution for low power consumption in chips and simplify global timing assumptions, e.g. on clock skew, by having asynchronous communication between modules. A few methodologies, including globally asynchronous, locally synchronous and desynchronisation, aim at leveraging the benefits of both synchronous and asynchronous design paradigms. The authors survey various methodologies used for leveraging asynchronous on-chip communication. They investigate various GALS based implementations, desynchronisation strategies and asynchronous network-on-chip (NoC) designs

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Applications of artificial intelligence FRee seminar topics | seminar tiltle

2011-07-05T09:02:00.000-07:00

Abstract

Artificial intelligence has been used in a wide range of fields including medical diagnosis, stock trading, robot control, law, scientific discovery and toys. However, many AI applications are not perceived as AI: "A lot of cutting edge AI has filtered into general applications, often without being called AI because once something becomes useful enough and common enough it's not labeled AI anymore. "Many thousands of AI applications are deeply embedded in the infrastructure of every industry."In the late 90s and early 21st century, AI technology became widely used as elements of larger systems, but the field is rarely credited for these successes.

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Application of delay tolerant networking (DTN) in Airborne Networks : free seminar topics

2011-07-05T09:00:00.000-07:00

Abstract

As airborne networks (ANs) evolve and become increasingly net-centric, it is critical that apt consideration is given to properly extend Internet protocol (IP)-based networking services to the tactical assets. This is an effort to resolve current interoperability issues through the use of a standard protocol and provide IP connectivity between all airborne network platforms. However, large gaps exist between the current AN architecture and future envisioned net-centric capabilities. The dynamic nature of the AN topology, typically characterized by highly intermittent links and long link delays, limits the use and effectiveness of Internet-based standards and protocols. Developed separately, the delay tolerant network (DTN) architecture has been designed to address the needs of networks characterized by link intermittency, lack of end-to-end connectivity between end users, and high latency. While originally developed for deep space networking and inter-planetary communications, DTNs are highly applicable for sensor-based networks, terrestrial wireless networks, satellite networks, underwater acoustic networks as well as airborne networks. This paper addresses the specific challenges of establishing and maintaining reliable communications within an IP-based AN environment. In addition, this paper provides an overview of DTN, and details how this technology may be integrated into to the AN infrastructure in order to address the current issues affecting AN performance

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Analysis of Queuing Delay in RPR Networks free seminar title, topics

2011-07-05T08:58:00.001-07:00

Abstract

Resilient packet ring (RPR) that has been standardized as IEEE 802.17 is a MAC layer protocol designed for data centric metropolitan area network applications. A well-designed RPR network would be able to offer QoS guarantee for throughput and delay sensitive data classes in addition to providing other types of low cost best effort services. Careful network planning would be required to allow successful provisioning of classA services with strict delay and jitter requirements over RPR networks. This would require the knowledge of the dependency of delay and jitter for classA traffic on the load that is added to the ring. In this article, we propose an algorithm to estimate the dependency of delay and jitter for classA traffic in RPR networks on the total traffic added to the ring by nodes. We will follow an analytical approach based on queuing theory to find the probability density function of the delay for classA packets and try to find a closed-form solution to the problem using some simplifying assumptions. Simulations are used to verify the results of analytical derivations

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Analysis of coordination mechanisms in a two-echelon supply chain free seminar topics

2011-07-05T08:57:00.000-07:00

Abstract

Coordinating the supply chain is a main object of supply chain management, and an inventory decision model is developed to analyze the coordination of a two-echelon supply chain with one supplier and one retailer. The products in our paper are perishable and sold over a single selling season. After discussing a pure wholesale price contract, we put forward a return contract. Then several tactics are proposed to improve the performance of the traditional return contract. All our findings are illustrated by a numerical example

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An On-Chip In-Circuit Emulation Architecture for Debugging an Asynchronous Java Accelerator free seminar topic and title

2011-07-05T08:55:00.000-07:00

Abstract

The solution to debug a problem in a deeply embedded system is to integrate the debug and communication module inside the chip. In this paper, we propose an on-chip in-circuit emulation (ICE) architecture for debugging an asynchronous Java accelerator core which can be integrated with any existing processor and operating system. The operation of this ICE module and the debug strategy of the Java accelerator are specifically designed for asynchronous implementation. They not only facilitate the system development but also provide a manufacture test method for asynchronous chips.

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An OFDM-specified lossless FFT architecture : free seminar topics ,seminar title

2011-07-05T08:53:00.000-07:00

Abstract

In this paper, a VLSI architecture based on radix-22 integer fast Fourier transform (IntFFT) is proposed to demonstrate its efficiency. The IntFFT algorithm guarantees the perfect reconstruction property of transformed samples. For a 64-points radix-22 FFT architecture, the proposed architecture uses 2 sets of complex multipliers (six real multipliers) and has 6 pipeline stages. By exploiting the symmetric property of lossless transform, the memory usage is reduced by 27.4%. The whole design is synthesized and simulated with a 0.18-mum TSMC 1P6M standard cell library and its reported equivalent gate count usage is 17,963 gates. The whole chip size is 975 mumtimes977 mum with a core size of 500 mumtimes500 mum. The core power consumption is 83.56 mW. A Simulink-based orthogonal frequency demodulation multiplexing platform is utilized to compare the conventional fixed-point FFT and proposed IntFFT from the viewpoint of system-level behavior in items of signal-to-quantization-noise ratio (SQNR) and bit error rate (BER). The quantization loss analysis of these two types of FFT is also derived and compared. Based on the simulation results, the proposed lossless IntFFT architecture can achieve comparative SQNR and BER performance with reduced memory usage

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Ajax : free seminar topic | seminar title

2011-07-05T08:51:00.000-07:00

Abstract

Ajax ( is a group of interrelated web development methods used on the client-side to create interactive web applications. With Ajax, web applications can send data to, and retrieve data from, a server asynchronously (in the background) without interfering with the display and behavior of the existing page. Data is usually retrieved using the XMLHttpRequest object. Despite the name, the use of XML is not needed (JSON is often used instead), and the requests need not be asynchronous.
Like DHTML and LAMP, Ajax is not one technology, but a group of technologies. Ajax uses a combination of HTML and CSS to mark up and style information. The DOM is accessed with JavaScript to dynamically display, and to allow the user to interact with the information presented. JavaScript and the XMLHttpRequest object provide a method for exchanging data asynchronously between browser and server to avoid full page reloads.

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Adaptive power-fidelity in energy-aware wireless embedded systems free seminar topic

2011-07-05T08:48:00.001-07:00

Adaptive power-fidelity in energy-aware wireless embedded systems

Abstract

Energy aware system operation, and not just low power hardware, is an important requirement for wireless embedded systems. These systems, such as wireless multimedia terminals or wireless sensor nodes, combine (soft) real-time constraints on computation and communication with requirements of long battery lifetime. In this paper, we present an OS-directed dynamic power management technique for such systems that goes beyond conventional techniques to provide an adaptive power vs. fidelity trade-off. The ability of wireless systems to adapt to changing fidelity in the form of data losses and errors is used to tradeoff against energy consumption. We also exploit system workload variation to proactively manage energy resources by predicting processing requirements. The supply voltage, and clock frequency are set according to predicted computation requirements of a specific task instance, and an adaptive feedback control machanism is used to keep system fidelity (deadline misses) within specifications. We present the theoretical framework underlying our approach in the context of both a static priority-based preemptive task scheduler as well as a dynamic priority based one, and present simulation-based performance analysis that shows that our technique provides large energy savings (up to 76%) with little loss in fidelity (<4%). Further, we describe the implementation of our technique in the eCos real-time operating system (RTOS) running on a StrongARM processor to illustrate the issues involved in enhancing RTOSs for energy awareness.

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Achieving EMC compliance by design - case study of fixed remote station in corDECT WLL system | free seminar topic

2011-07-05T08:47:00.000-07:00

Achieving EMC compliance by design - case study of fixed remote station in corDECT WLL system

Abstract

Telecommunication has an important role in society enabling effective voice & data communication between people across the globe. EMC compliance is mandatory and vital for telecom products. This paper deals with the efforts put in during the design & development and EMC testing of such a telecom product - Wireless in Local Loop (WLL) system to comply to International standards like ETSI, IEC & CISPR and National standards like TEC. This paper also highlights the advantages of incorporating EMC design rules in early stage of design, due to flexibility in choosing of components like filters, shields and protective devices to achieve cost-effective solution and avoiding field modification. A case study of telecom product, viz., (FRS) Fixed Remote Station of Wireless Local Loop (WLL) subsystem, used in subscriber premises for voice telephony and Internet connectivity is taken up for elucidating EMI problems encountered during the EMC certification process and the measures taken to mitigate the same. The experience gained during this FRS EMC compliance certification of the corDECT system will substantially reduce the cycle time in future products with better design margin. Emission and susceptibility requirements from Standard Institutes to meet the Regulatory Authorities are also outlined

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A uniform laser energy control for ceramic sintering rapid prototyping free seminar topics

2011-07-05T08:46:00.000-07:00

A uniform laser energy control for ceramic sintering rapid prototyping

Abstract

The rapid-prototyping has become popular nowadays as the lifecycles of commercial and consumer products have been shorten to years or even months. The rapid prototyping technology provides a modern way to review the rapid change of the product has forced the designers and manufacturers to make new designs, jigs, tools, and molds for the products. Unlike the traditional machining of cutting material, the rapid prototyping utilize technologies, such as etching, laser, etc., to form the shapes of designed articles within limited time and cost. As cutting-through is prohibited, means to control the machining are required and important to the success of prototyping. This study has focused on the laser energy control for the ceramic rapid prototyping, which will sinter the ceramic powders into a solid object. A uniform laser energy controller is developed to improve the quality of the ceramic working piece. The developed method has been implemented and tested on a MCU and FPGA controller to demonstrate its applicability to ceramic sintering rapid prototyping.

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A Tempest Fiber Optic Local Area Network post free seminar topics

2011-07-05T08:45:00.000-07:00

A Tempest Fiber Optic Local Area Network post

Abstract

Local Area Networks (LANs) are coming to the forefront in data communications for both commercial as well as military applications. This thrust has resulted from the requirement to provide communications and resource sharing between dispersed users of computers and/or workstations. For many government/military applications, security is a key aspect. This paper describes a recently developed TEMPEST LAN which utilizes optical fiber as the communications medium along with LAN transceivers and communication servers designed to meet TEMPEST requirements. The LAN operates at 10 Mb/s using the Ethernet and IEEE 802.3 Standards.

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A New Routing Scheme Based on Greedy Tree in Delay Tolerant Networks

2011-07-05T08:40:00.000-07:00

A New Routing Scheme Based on Greedy Tree in Delay Tolerant Networks

Abstract

Delay tolerant networking (DTN) is a new store-and-forward architecture and protocol suite for the networks which is intermittent connectivity. Depending on the nodes ability of store and forward, the messages are delivered to their destination with the proper choice of routing protocol by nodes' mobility. In order to successful delivery, many routing protocols use multiply copies methods. Although the messages are transferred to the destination, the redundant of messages copies increase much. These routing protocols are not appropriate for energyconstrained and bandwidth-constrained applications such as the wireless networks. In many resource-constrained mobile wireless DTN networks, single copy routing schemes should be used suitably. This paper presents a new routing scheme of single-copy based on the DTN connectivity graph and the corresponding greedy tree. The nodes choose the next intermediate node to transmit the message by comparing the location of nodes in the greedy tree. We show that delivery ratio is increased significantly by using our scheme in the single-copy routing

A Fast Number Theoretic Finite Radon Transform - seminar topics,it seminar topics,latest seminar topics,seminar topics on computer science

2011-06-24T09:38:00.000-07:00

A Fast Number Theoretic Finite Radon Transform

Abstract

This paper presents a new fast method to map between images and their digital projections based on the Number Theoretic Transform (NTT) and the Finite Radon Transform (FRT). The FRT is a Discrete Radon Transform (DRT) defined on the same finite geometry as the Finite or Discrete Fourier Transform (DFT). Consequently, it may be inverted directly and exactly via the Fast Fourier Transform (FFT) without any interpolation or filtering [F. Matus and J. Flusser (1993)]. As with the FFT, the FRT can be adapted to square images of arbitrary sizes such as dyadic images, prime-adic images and arbitrary-sized images. However, its simplest form is that of prime-sized images [T. Hsung, D. Lun, and W. C. Siu (1996)]. The FRT also preserves the discrete versions of both the Fourier Slice Theorem (FST) and Convolution Property of the Radon Transform (RT). The NTT is also defined on the same geometry as the DFT and preserves the Circular Convolution Property (CCP) of the DFT [J. M. Pollard (1971) and C. Rader (1972)]. This paper shows that the Slice Theorem is also valid within the NTT and that it can be utilized as a new exact, integer-only and fast inversion scheme for the FRT, with the same computational complexity as the FFT. Digital convolutions and exact digital filtering of projections can also be performed using this Number Theoretic FRT (NFRT).

Achieving EMC compliance by design - case study of fixed remote station in corDECT WLL system | seminar topics,it seminar topics,latest seminar topics,seminar topics on computer science

2011-06-22T08:34:00.000-07:00

Achieving EMC compliance by design - case study of fixed remote station in corDECT WLL system

Abstract

A uniform laser energy control for ceramic sintering rapid prototyping - seminar topics,it seminar topics,latest seminar topics,seminar topics on computer science

2011-06-22T08:26:00.000-07:00

A uniform laser energy control for ceramic sintering rapid prototyping

Abstract

A Tempest Fiber Optic Local Area Network Seminar Topic - seminar topics,it seminar topics,latest seminar topics,seminar topics on computer science

2011-06-22T08:23:00.000-07:00

A Tempest Fiber Optic Local Area Network