One of the key steps in economy based grid resource allocation is to make reasonable prices for the grid resources. For resources' prices decide the resource flow in the Grid, further influence Grid resources'...
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ISBN:
(纸本)0769523153
One of the key steps in economy based grid resource allocation is to make reasonable prices for the grid resources. For resources' prices decide the resource flow in the Grid, further influence Grid resources' trading efficiency. This article, instead of discussing the pricing algorithm, argues an autonomous pricing mechanism that leaves the prices to be decided by the Grid traders within their trading process. We firstly point out the factors that influence the resources' prices;then make out the trading flow for resource consumer agents and provider agents. By doing these, the two trading agents can decide their price due to the dynamic changes of the Grid environment without any manmade interferences. Since price is the core of market economy, the autonomous pricing strategy provides us with a foundation to use the invisible hand of market to allocate the Grid resource.
In many applications a software implementation of ECC (Elliptic Curve Cryptography) might be inappropriate due to performance requirements, therefore hardware implementations are needed. We present some results about ...
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ISBN:
(纸本)0769523153
In many applications a software implementation of ECC (Elliptic Curve Cryptography) might be inappropriate due to performance requirements, therefore hardware implementations are needed. We present some results about a novel hardware implementation for ECC, that introduces also a form of parallelism to maximize the use of function units and hence to improve the throughput. Then we propose a comprehensive comparison of this new architecture with both some RSA architectures and other ECC implementations in ASIC VLSI technology.
We propose an electronic voting (e-voting) scheme that combines user-centric mix networks with voter-verifiable receipts. Unlike traditional mixilet-based e-voting schemes, our scheme empowers voters;the voters themse...
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ISBN:
(纸本)0769523153
We propose an electronic voting (e-voting) scheme that combines user-centric mix networks with voter-verifiable receipts. Unlike traditional mixilet-based e-voting schemes, our scheme empowers voters;the voters themselves decide the degree of anonymity required. Voters requiring a greater degree of anonymity obtain it by performing several protocol iterations. The proposed scheme utilizes incoercible, voter-verifiable receipts. It is robust as no reasonable-sized coalition can interfere with the correct operation. Finally, it is efficient as the number of transmitted messages increases linearly with the number of voters.
The amount of structured information available in Internet sources is rapidly increasing. This information includes commercial databases on product information and information on e-services forming the so-called e-sho...
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ISBN:
(纸本)0769510620
The amount of structured information available in Internet sources is rapidly increasing. This information includes commercial databases on product information and information on e-services forming the so-called e-shops. However. the process of using this information has become more complicated, and can sometimes be tedious for users with different goals, interests, levels of expertise, abilities and preferences. This paper deals with the definition of an architectural framework for intelligent, adaptive and personalised navigation within large hypertext Electronic Commerce environments.
Most XML-Enabled database management systems can only translate a few relations into an XML document. Moreover, the translation is without data semantics constraints consideration, which may not be sufficient for info...
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ISBN:
(纸本)0769521088
Most XML-Enabled database management systems can only translate a few relations into an XML document. Moreover, the translation is without data semantics constraints consideration, which may not be sufficient for information highway on the web. The demand on database is increased in e-commerce. Not only relational database (RDB) is needed for traditional data processing, but also its equivalent XML documents (database) are needed for B2B applications. Therefore, performance for online conversion from relational data to XML document is an issue. This paper aims to create a replicate XML database for a company's RDB to improve database performance, and to automate XML database recovery in case of system failures. For any successful update to the RDB, corresponding update will be applied to its replicate XML database. The result is an incrementally maintained XML database for efficient and effective computing for e-commerce. In summary, Internet computing performance can be improved because a replicate XML database and its counterpart RDB can be parallel processing for both internal data and external data transmission on the Internet. Furthermore, an XML database can be recovered by its counterpart RDB once it is down.
New developments in the field of theoretical chemistry require the computation of numerous Molecular Potential Energy Surfaces (PESs) to generate adequate quantum force field parameters. Because workstations alone can...
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ISBN:
(纸本)0769523153
New developments in the field of theoretical chemistry require the computation of numerous Molecular Potential Energy Surfaces (PESs) to generate adequate quantum force field parameters. Because workstations alone cannot fulfill the requirements of these modem chemical advances, we present in this paper how we have tackled this problem using several up-to-date computer science technology such as grid-computing middleware, molecular databases, script interfacing, etc. An example on the optimization of semiempirical parameters for water shows the potential power of our approach and the benefit theoretical chemistry can gain with it.
This paper provides results from a study analyzing current trends in multimedia Web searching. Results include: (1) multimedia searches are more complex than general searches in queries per user session and terms per ...
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ISBN:
(纸本)0769515061;076951507X
This paper provides results from a study analyzing current trends in multimedia Web searching. Results include: (1) multimedia searches are more complex than general searches in queries per user session and terms per query, and (2) audio queries are the most popular type of multimedia queries (compared to video and image queries) in number of queries submitted and query durations.
Resource Brokers on the Grid consult a number of distributed information services to select the best data source and/or computational resource based on user requirements. The consultation task increases the design com...
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ISBN:
(纸本)0769523153
Resource Brokers on the Grid consult a number of distributed information services to select the best data source and/or computational resource based on user requirements. The consultation task increases the design complexity of Resource Brokers. This work is the first attempt to unify the distributed grid information services in one framework. The Grid Query Service (GQS) is composed of information services layered on OGSA-DAI Grid services, which are generic data access and integration services. Grid Resource Brokers can consult just one service, the GQS service, to obtain indexed information about grid resources.
Novel synchronous coding schemes are introduced and relationships between optimal synchronous codes and Huffman codes are also discussed. Although the problem of existence of optimal synchronous codes has not been res...
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ISBN:
(纸本)0769515061;076951507X
Novel synchronous coding schemes are introduced and relationships between optimal synchronous codes and Huffman codes are also discussed. Although the problem of existence of optimal synchronous codes has not been resolved yet, we show that any synchronous code can consider as an optimal synchronous code for some information source and that there always exist optimal synchronous codes for the information source with a dyadic probability, distribution. Comparing with Huffman coding, the synchronous coding is used not only for statistical modeling but also for dictionary methods. Moreover, it is proven that breaking a synchronous code is NP-complete.
This paper proposes a new multiple description coding technique that uses different data transforms to generate multiple descriptions of a given signal. A linear fusion is employed to reconstruct the signal as the out...
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ISBN:
(纸本)0769523153
This paper proposes a new multiple description coding technique that uses different data transforms to generate multiple descriptions of a given signal. A linear fusion is employed to reconstruct the signal as the output of a central decoder. This new method exhibits the advantages of multiple description vector quantization while having the complexity of multiple description scalar quantization. Another technique called "forced errors in channels" is then introduced to reduce the distortion in the central decoder output allowing some increase in the side distortions. When applied to images, the new techniques yield results, which are competitive compared with the results from current state-of-the-art coders.
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