We compare the BERKOM globally accessible services project (GLASS) with the well-known World-Wide Web with respect to the ease of development, realization, and distribution of multimedia presentations. This comparison...
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We compare the BERKOM globally accessible services project (GLASS) with the well-known World-Wide Web with respect to the ease of development, realization, and distribution of multimedia presentations. This comparison is based on the experiences we gained when implementing a gateway between GLASS and the World-Wide Web. Since both systems are shown to have obvious weaknesses, we conclude this paper with a presentation of a better way for multimedia document engineering and distribution. This concept is based on a well-accepted approach to function-shipping in the Internet: the Java language, permitting for example a smooth integration of GLASS' MHEG objects and WWW HTML pages within one common environment.
The Personal software Process (PSP) has been taught at a number of universities with impressive results. If is also of interest to industry as a means for training their software engineers. While there are published r...
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The Personal software Process (PSP) has been taught at a number of universities with impressive results. If is also of interest to industry as a means for training their software engineers. While there are published reports on the teaching of PSP in classroom settings (at universities and industry), little systematic study has been conducted on the implementation of PSP in industry. Also, largely anecdotal evidence exists as to its effectiveness with real programming tasks. Effectiveness is measured in terms of the number of trained engineers who actually use PSP in their daily work, and improvements in productivity and defect removal. We report on a study of the implementation of some PSP concepts in a commercial organization. The empirical enquiry method that we employed was action research. Our results identify the problems that were encountered during the four major activities of an implementation of PSP: planning, training, evaluation, and leveraging. We describe how these problems were addressed, and the general lessons learned from the implementation. An overall transfer of PSP training rate of 46.5% was achieved. For the engineers in our study, those who applied all of the taught PSP concepts on-the-job improved their defect detection capabilities.
The intelligent peripheral (IP) is one of the key central resources in the intelligent network concept, allowing user to network interaction for services such as credit card calling. User access to IPs is controlled b...
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The intelligent peripheral (IP) is one of the key central resources in the intelligent network concept, allowing user to network interaction for services such as credit card calling. User access to IPs is controlled by service control points (SCPs) and is typically gained via voice trunk groups from service switching points (SSPs), with many services sharing common SSP-IP trunk group facilities. This paper proposes and analyses a distributed overload control scheme for the fair allocation of these facilities. The algorithm is shown to be effective in protecting services from the detrimental effects of focused overloads (to one or more other services) while minimising the information passed from the SSPs/IPs to the SCPs.
We propose a method for integrating a preexisting conventional database system with a multimedia server in a multidatabase environment. In the multidatabase environment, changes to the preexisting database system are ...
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We propose a method for integrating a preexisting conventional database system with a multimedia server in a multidatabase environment. In the multidatabase environment, changes to the preexisting database system are not allowed because such changes are too expensive. For the integration, high-level semantic description of multimedia data is modeled using the enhanced entity-relationship (EER) model to support content-based retrieval of multimedia data. The EER design is translated into a schema of the preexisting database system and then the translated schema is integrated with the preexisting database schema. The content description can be used to locate pertinent multimedia data, and the identifiers are used to access the multimedia data stored in the multimedia server. However, with only a simple schema representation of the semantic description of multimedia data, high levels of recall and precision of queries may not be obtained because conventional database systems provide only exact matching answers to the query. Thus, we extended the conventional query processing mechanism by providing a modified cooperative query answering mechanism.
Based on the capability maturity model (CMM), process improvement at OMRON, a Japanese microprocessor manufacturer, increased project predictability in three ways: Accuracy, variability, and performance. The authors u...
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Based on the capability maturity model (CMM), process improvement at OMRON, a Japanese microprocessor manufacturer, increased project predictability in three ways: accuracy, variability, and performance. The authors u...
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Based on the capability maturity model (CMM), process improvement at OMRON, a Japanese microprocessor manufacturer, increased project predictability in three ways: accuracy, variability, and performance. The authors use the project visibility index (PVI) and other measurements to quantitatively demonstrate this. Qualitative analysis of how and why OMRON achieved higher project visibility and increases in the QCD (quality, cost, and delivery on time) factors are supported with data on review-effort ratios and productivity. They identify factors directly affected by high project visibility.
We discuss ASPECT, a first step towards a generic specification technique for software architectures. We present and discuss an abstract grammar for ASPECT that lists and relates to each other all the architectural el...
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We discuss ASPECT, a first step towards a generic specification technique for software architectures. We present and discuss an abstract grammar for ASPECT that lists and relates to each other all the architectural elements that form ASPECT's vocabulary. After elaborating on the characteristics of these architectural elements, we illustrate their application in a small example.
Despite significant progress in the last 15 years, implementing a successful measurement program for software development is still a challenging undertaking. Most problems are not of theoretical but of methodological ...
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作者：
Nelson, MLMaa, MHMichael L. Nelson is the “webmaster” for NASA Langley Research Center
Computer Systems Branch Mail Stop 157A 15 Langley Boulevard Hampton VA 23681‐0001 USA. Tel: 804 8648511 Fax: 804 8648342E‐mail: <m.l.nelson@larc.nasa.gov> . He has also worked with others to implement report servers
software servers technology transfer databases and other World Wide Web services and is also the technical lead for NASA Langley Research Center’s workstation clustering activities. Ming‐Hokng Maa is a NASA Langley Research Center Cooperative Education Student e‐mail: <m.h.maa@larc.nasa.gov> pursuing his BS in computer engineering/computer science at the Massachusetts Institute of Technology. He has previously held research positions at nView Corp. and the Inter‐National Research Institute Inc Ming‐Hokng Maa is a NASA Langley Research Center Cooperative Education Student
e‐mail: <m.h.maa@larc.nasa.gov> pursuing his BS in computer engineering/computer science at the Massachusetts Institute of Technology. He has previously held research positions at nView Corp. and the Inter‐National Research Institute Inc
Explains how the NASA Technical Report Server, a World Wide Web report distribution NASA technical publications service, has been modified for performance enhancement, greater protocol support and human interface opti...
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Explains how the NASA Technical Report Server, a World Wide Web report distribution NASA technical publications service, has been modified for performance enhancement, greater protocol support and human interface optimization. Results include: parallel database queries, significantly decreasing user access times by an average factor of 2.3;access from clients behind firewalls and/or proxies which truncate excessively long Uniform Resource Locators;access to non-Wide Area Information Server (WAIS) databases and compatibility with the Z39-50.3 protocol;and a streamlined user interface.
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