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Bluetooth potential in the m-enterprise: a feasibility study

Bluetooth potential in the m-enterprise: a feasibility study

引用

international conference on information technology: coding and computing (itcc)

作者： S. Pradhan E. Lawrence J. Das S. Newton University of Technology Sydney Australia Estrategias Australia

Today's workforce is becoming increasingly mobile. Handheld devices have evolved into indispensable enterprise tools, which enhance the mobile knowledge workers' ability to remain connected and productive. A WPAN (wireless personal area network) is intended for mobility and simple, short-range point-to-point communication with personal devices. The usage of Bluetooth wireless network technology is growing as it exploits low-cost, power efficient radio technology to support both point-to-point and point-to-multipoint connections. However, knowledge workers may find out that Bluetooth devices work with some products and not with others. We report on compatibility and interoperability issues experienced during the setting up of a mobile enterprise Bluetooth and WLAN Laboratory at the University of technology in Sydney. It examines whether Bluetooth could be an adequate mobile solution in m-enterprises.

关键词： Bluetooth Interference Mobile handsets Wireless personal area networks Mobile communication Wireless LAN Laboratories Business Personal digital assistants Frequency

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Significance of steganography on data security

Significance of steganography on data security

引用

international conference on information technology: coding and computing (itcc)

作者： VenkatramanS Ajith Abraham M. Paprzycki Dept. of Comput. Sci. & Eng. Madras Univ. India Dept. of Computer Science Oklahoma State University USA

With the ever increasing amount and variety of data to be stored and transmitted in various mediums, the specification of security which has to be established at various levels of medium access and the accompanying issues of authentication and authorization has become a critical factor. Various steganographic, watermarking and data-embedding algorithms have usually manipulated the actual data in order to either hide any coveted information or to provide some level of access control over the medium. The mediums are usually images, video, audio etc., wherein specific portions or the overall space is usually 'corrupted' with 'significant' data. We attempt to bring out the significance of the steganographic techniques that are employed in information processing algorithms for data security. It deals with the problem of data security, focusing mainly on images, and tries to state the various properties and characteristics that the steganographic algorithms should possess. We also highlight the technique of masking used in the conventional steganographic LSB algorithms and in its variants.

关键词： Steganography Data security Colored noise Color Authentication information security Computer science Watermarking Internet Sorting

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Efficient multicast e-services over APPCAST

Efficient multicast e-services over APPCAST

引用

international conference on information technology: coding and computing (itcc)

作者： V. Radha V.P. Gulati A.K. Pujari Institute for Research and Development in Banking Technology Hyderabad India University of Hyderabad Hyderabad India

Multicasting is well known as a bandwidth conserving technology. Applications couldn't exploit broadcast media property or reduce redundant packets' movement over common paths of network as the applications are written in unicast mode. This is due to complex multicast application programming support and the high abstraction TCP/IP provides over the underlying physical media. Researchers turned to alternate multicast mechanisms like application layer multicast-ALM, where in participating hosts are arranged in overlay topologies like tree, mesh etc and hosts route data among themselves in normal unicast mode. We discuss a new application layer overlay&APPCAST and show common application architecture for both unicast and multicast using SOAP with no special effort from programmer for multicast. Architecture also allows exploiting broadcast nature of media.

关键词： Multicast protocols Unicast Application software Broadcasting Simple object access protocol Network topology Computer architecture Military computing Clustering algorithms Multicast algorithms

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Accessing temporal data objects in mobile computing environments

Accessing temporal data objects in mobile computing environm...

引用

international conference on information technology: coding and computing (itcc)

作者： A.C.S. Wong V.C.S. Lee Kwok-Wa Lam Department of Computer Science City University of Hong Kong Hong Kong China

In mobile computing environments, many real life applications involve transaction processing with temporal data objects which are updated periodically by external environment. Transaction in temporal database not only has to meet the transaction deadline, but also the data deadline of temporal objects. Traditional concurrency control algorithms used in real-time database are no longer suitable for temporal database. In this paper, a new optimistic concurrency control algorithm, OCC-AVI is devised for processing mobile read-only transactions with the above deadline requirements. Based on the absolute validity interval (AVI) information, read-only transactions at mobile clients can autonomously choose to read a valid value of a temporal object from local cache or pull an updated value from the server. Experimental results show that OCC-AVI can significantly improve the system performance.

关键词： Mobile computing Transaction databases Concurrency control Broadcasting Network servers System performance Communication system traffic control Intelligent sensors Monitoring Computer science

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NICD: a novel indexless wireless on-demand data broadcast algorithm

NICD: a novel indexless wireless on-demand data broadcast al...

引用

international conference on information technology: coding and computing (itcc)

作者： O.B.V. Ramanaiah H. Mohanty Department Of CIS University of Hyderabad India

Data dissemination by broadcast is the most cost-effective and scalable solution for the asymmetric mobile environment. Usually, data objects in periodic broadcast schedule are interleaved with index information to help mobile hosts (MHs) minimize their channel tuning time. On the contrary, presence of index information increases broadcast cycle length and hence the mean response time of MHs. There are many scheduling algorithms in literature which optimize either mean response time or tuning time or both (at least for suboptimal solution). We propose a novel on-demand broadcast algorithm, named NICD (normalized intercluster distance), which eliminates the need for indexing the broadcast schedule by enabling MHs compute the required index information themselves. Rural health care (RHC) system is just one application of the proposed algorithm. Simulation-based experiments are carried out with synthetic data, and it is observed that it effectively eliminates the need for indexing at the computational overhead of O(N/sup 2/), where N is the number of clusters present in the collected information; and this is insignificant when compared against communication overhead due to the presence of index.

关键词： Broadcasting Broadcast technology information technology

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Adaptive Web document classification with MCRDR

Adaptive Web document classification with MCRDR

引用

international conference on information technology: coding and computing (itcc)

作者： Yang Sok Kim Sung Sik Park E. Deards Byeong Ho Kang School of Computing University of Tasmania Hobart TAS Australia

With the explosive increase in Web based information, the need for an intelligent agent for automatic classification has also been increased resulting in many research discoveries in this area. Machine learning (ML) based document classification is now the prevalent approach. However, classification by ML may not keep the same performance because the knowledge generated from the training set may not be appropriate for certain types of Web information. People are often concerned more about the newly uploaded information such as Web based online news than information already available. This explains why it is not widely used in real applications. However, the manual classification method, by the domain users, cannot be a solution either until the knowledge acquisition bottleneck issue is resolved. Multiple classification ripple down rules, an incremental knowledge acquisition method, is suggested to overcome this problem with fast learning and low cost maintenance.

关键词： Classification tree analysis Text categorization Knowledge acquisition Explosives Machine learning Search engines Monitoring Intelligent agent Costs Manuals

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A fast computation scheme of partial distortion entropy updating

A fast computation scheme of partial distortion entropy upda...

引用

international conference on information technology: coding and computing (itcc)

作者： H. Takizawa H. Kobayashi Information Synergy Center University of Tohoku Japan

The entropy of normalized partial distortions, referred to as the partial distortion entropy, is a very useful metric for online optimality evaluation of a vector quantization code-book. However, it is computationally expensive to update the partial distortion entropy so that it adapts to the changes in a codebook. Hence, its naive computation results in considerably increasing the cost of vector quantization code-book design, especially in the case of a large codebook. This paper presents a novel scheme of the partial distortion entropy updating. The proposed scheme is devised to update the partial distortion entropy without fully recalculating it. Therefore, the scheme requires much less computation than the recalculation, and its computational cost is constant irrespective of a codebook size. Experimental results clearly show that the proposed scheme is significantly effective for saving the computational cost of vector quantization codebook design with the partial distortion entropy.

关键词： Entropy Computational efficiency Vector quantization Costs Data compression Minimization methods Neural networks Algorithm design and analysis Heuristic algorithms Equations

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Extensible communication architecture for grid nodes

Extensible communication architecture for grid nodes

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international conference on information technology: coding and computing (itcc)

作者： N. Mohamed J. Al-Jaroodi H. Jiang Department of Computer Science and Engineering University of Nebraska Lincoln Lincolnshire NE USA

Nodes in the grid can be connected through a multigigabit network. However, the network interfaces in the nodes can become a bottleneck for the maximum achievable bandwidth among nodes. We propose an extensible communication architecture to avoid the limitations of the network interfaces by integrating multiple network interfaces in each node. The proposed solution deploys a technique to balance the network traffic load among multiple network interfaces in a single node. While this technique enhances communication bandwidth among the nodes, it is distributed and does not require any coordination or reservation mechanisms. It achieves the maximum possible bandwidth between any pair of grid nodes with multiple network interfaces. The experimental evaluation provided good results and demonstrated the benefits of the proposed architecture.

关键词： Bandwidth Network interfaces Computer architecture Computer science Grid computing Optical fiber networks Load management Telecommunication traffic Data mining Computational modeling

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Mapping methods and query for aggregation and association in object-relational database using collection

Mapping methods and query for aggregation and association in...

引用

international conference on information technology: coding and computing (itcc)

作者： E. Pardede J.W. Rahayu D. Taniar Department of Computer Science & Computer Engineering La Trobe University Bundoora VIC Australia School of Business Systems Monash University Clayton VIC Australia

Association and aggregation are two relationship types in the object-oriented conceptual model (OOCM) that frequently involve collection of elements/attributes. However, very often when the relationships are stored in object relational database (ORDB) the collection is flattened like it is implemented by pure relational model. In this paper we propose the mapping methods to preserve the collection semantics in ORDB using collection data type. In aggregation we propose methods for different constraints types, while in association we propose methods for "many" cardinality (I:N, N:N) relationships. In addition, we also show how queries can be performed in the relationships using collection type.

关键词： Relational databases Australia Object oriented modeling Object oriented databases Business Design methodology information technology Writing

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A systolic memory architecture for fast codebook design based on MMPDCL algorithm

A systolic memory architecture for fast codebook design base...

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international conference on information technology: coding and computing (itcc)

作者： K. Sano C. Takagi R. Egawa K. Suzuki T. Nakamura Graduate School of Information Sciences University of Tohoku Japan

Vector quantization with an adaptive codebook is attractive for lossy data compression. During the last few decades, architectures have been proposed to accelerate adaptive codebook design that requires a huge amount of computation. However, they are mainly based on Kohonen competitive learning algorithm or LBG algorithms that have an essential problem, the under-utilization problem. This paper presents a systolic memory architecture for highspeed codebook design based on MMPDCL algorithm not suffering from the under-utilization problem. We modify MMPDCL algorithm to exploit parallelism and implement with simple hardware. Simulation results demonstrated that the modified MMPDCL algorithm can give codebooks with comparable MSEs to the original MMPDCL algorithm.

关键词： Memory architecture Algorithm design and analysis Computer architecture Vector quantization Data compression Parallel processing Hardware Nearest neighbor searches Partitioning algorithms Acceleration

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