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113th Annual ASEE Conference and Exposition, 2006

作者： Turns, Jennifer Linse, Angela VanDeGrift, Tammy Eliot, Matt Jones, Jana Lappenbusch, Steve University of Washington United States Department of Technical Communication University of Washington United States Temple University United States Teaching and Learning Center Temple University United States National Science Foundation Grant Investigating the Teaching Challenges of Engineering Faculty United States University of Portland United States Computer Science Department University of Portland United States Microsoft Corp. United States San Francisco Bay Area United States

For many engineering educators, the topic of diversity can be frustrating and difficult. Writing and sharing individual diversity statements represents one strategy for empowering educators in their efforts to address diversity in their teaching. In this paper, we present the results of an empirical study in which graduate students (future engineering educators) prepared diversity statements as part of a teaching portfolio program. We focused our analysis on the discussions associated with diversity statement program sessions and found the talk during these sessions to be characterized by a variety of teaching and diversity ideas, an interweaving of teaching and diversity ideas, and equitable contribution among participants. We believe these results suggest that the diversity statement exercise has promise while also illustrating that graduate students are capable of tackling this complex issue with some success. © American Society for Engineering Education, 2006.

关键词： Engineering education

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A new greedy approach to k-median problem

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Journal of Information and Computational science 2006年第3期3卷 515-525页

作者： Pan, Rui Zhu, Daming Pan, Jiangzhou School of Computer Science and Technology Shandong University Jinan 250061 China Electric Teaching Section Training Institute of Shandong Police Officer Jinan 250014 China

The k-median problem has found applications in operations research and computer science. In real world, the fast and effective approximation algorithms are needed to solve the large-scale problem in a very short time. In this paper, a greedy algorithm is first presented, using the idea of greedy set cover algorithm. Assigning an identical open cost to every facility, the improved algorithm is proposed. Using the improved algorithm as a routine, the final greedy algorithm for k-median problem is presented, with running time of O(nmk), where n is the number of facilities and m is the number of cities, respectively. Finally, experimental results on instances from ORLIB, SL, GR and TSPLIB attest the efficiency and computational effect of these algorithms.

关键词： computer science

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XML Constraint-tree-based Functional Dependencies

XML Constraint-tree-based Functional Dependencies

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IEEE International Conference on e-Business Engineering (ICEBE)

作者： Teng Lv Ping Yan College of Mathematics & System Science Xinjiang University Urumqi China Teaching & Research Section of Computer Artillery Academy of PLA Hefei China

A concept of functional dependency in XML documents based on constraint-tree is proposed. The definition proposed in our paper overcomes the shortcomings of previous definitions in the following aspects: (1) it captures the tree-structured characteristics of XML documents in structure; (2) it considers a more general situation of XML functional dependencies based on sub-trees with some constraint conditions in XML documents. The relationship between our definition of XML functional dependencies and other related definitions is also discussed in the paper

关键词： XML Relational databases Educational institutions Mathematics Education Web sites

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Interactive Exercises To Support Effective Learning of UML Structural Modeling

Interactive Exercises To Support Effective Learning of UML S...

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Frontiers in Education (FIE) Conference

作者： Stephen Frezza Wayne Andersen Computer and Information Science Gannon University Erie PA USA Center for Excellence in Teaching and Learning Gannon University Erie PA USA

UML structural models involve understanding the semantic relationships of a visual language - specifically the relationships among class and instance diagrams, as well as the abstractions in relating these diagrams to the problem/design being modeled. The project presented in this paper focuses on student learning exercises wherein the students had the ability to navigate and "replay" a portion of a complex model that visually highlights the semantic meaning of various model features. The exercise was interactive, non-scripted, and problem-based, and allowed students to explore the semantics of applied UML and reflect on "mistakes" or extensions to the model. The significance of these findings indicate that non-scripted interactive learning exercises modeling complex visual semantics appears to have a positive impact with students least likely to succeed with the material

关键词： Unified modeling language Object oriented modeling Education Navigation Face recognition Aggregates Programming Software design Collaboration Physics computing

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Mapping Relational Schemas to XML DTDs with Constraints

Mapping Relational Schemas to XML DTDs with Constraints

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International Multi-Symposiums on computer and Computational sciences (IMSCCS)

作者： Teng Lv Ping Yan College of Mathematics & System Science Xinjiang University Urumqi China Teaching & Research Section of Computer Artillery Academy of PLA Hefei China

XML is becoming a prevalent format and de facto standard for data exchange in many applications. While traditionally, lots of data are stored and managed in relational databases. There is an urgent need to research some efficient methods to convert these data stored in relational databases to XML format when integrating and exchanging these data in XML format. The semantics of XML schemas are crucial to design, query, and store XML documents and functional dependencies are very important representations of semantic information of XML schemas. As DTDs are one of the most frequently used schemas for XML documents in these days, we use DTDs as schemas of XML documents. This paper studies the problem of schema conversion from relational schemas to XML DTDs. As functional dependencies play an important role in the schema conversion process, the concept of functional dependency for XML DTDs is used to preserve the semantics implied by functional dependencies and keys of relational schemas. A conversion method is proposed to convert relational schemas to XML DTDs in the presence of functional dependencies, keys and foreign keys. The methods presented preserves the semantics implied by functional dependencies, keys and foreign keys of relational schemas and can convert multiple relational tables to XML DTDs at the same time

关键词： XML Relational databases Mathematics Erbium Application software Web sites Web server Tree graphs

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Rediscovering the historical methodology of the earth sciences by analyzing scientific communication styles

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Special Paper of the Geological Society of America 2006年第413期413卷 105-120页

作者： Dodick, Jeff Argamon, Shlomo Science Teaching Center Hebrew University of Jerusalem Givat Ram Jerusalem 91904 Israel Department of Computer Science Illinois Institute of Technology 10 W. 31st Street Chicago IL 60616 United States

Despite the still-reigning concept of science proceeding by a monolithic "scientific method," philosophers and historians of science are increasingly recognizing that the scientific methodologies of the historical sciences (e.g., geology, paleontology) differ fundamentally from those of the experimental sciences (e.g., physics, chemistry). This new understanding promises to aid education, where currently, students are usually limited to the dominant paradigm of the experimental sciences, with little chance to experience the unique retrospective logic of the historical sciences. A clear understanding of these methodological differences and how they are expressed in the practice of the earth sciences is thus essential to developing effective educational curricula that cover the diversity of scientific methods. This chapter reviews the question of historical scientific methodology (focusing on geology), as it has been addressed by historians, philosophers, science educators, and working scientists. We present results of a novel linguistic analysis of scientific texts, which shows that such posited methodological differences are indeed reflected in scientific language use. Characteristic features of historical scientists' language can be directly connected to aspects of historical scientific methodology, as explicated by philosophers and historians of science. This shows that the same methodological concerns are reflected in working scientists' conceptualizations of their discipline. These results give guidance to science educators, in the light of the recent emphasis on teaching language skills, such as "Writing across the Curriculum," in order to focus on teaching and evaluating language and discourse skills within the methodological conceptual framework of the historical sciences. © 2006 Geological Society of America.

关键词： Curricula

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Integrating Probability with Time and Shared-Variable Concurrency

Integrating Probability with Time and Shared-Variable Concur...

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Annual IEEE/ NASA Goddard Workshop on Software Engineering

作者： Huibiao Zhu Shengchao Qin Jifeng He Jonathan P. Bowen Software Engineering Institute East China Jiao Tong University China Department of Computer Science University of Durham UK Centre for Applied Formal Methods London South Bank University UK

Complex software systems typically involve features like time, concurrency and probability, where probabilistic computations play an increasing role. It is challenging to formalize languages comprising all these features. In this paper, we integrate probability, time and concurrency in one single model, where the concurrency feature is modelled using shared-variable based communication. The probability feature is represented by a probabilistic nondeterministic choice, probabilistic guarded choice and a probabilistic version of parallel composition. We formalize an operational semantics for such an integration. Based on this model we define a bisimulation relation, from which an observational equivalence between probabilistic programs is investigated and a collection of algebraic laws are explored. We also implement a prototype of the operational semantics to animate the execution of probabilistic programs

关键词： Concurrent computing Software engineering Software systems Helium Prototypes Animation Hardware design languages Command languages computer science Time sharing computer systems

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Interfund linkage analysis: The case of the polish pension fund sector

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Economic Systems Research 2006年第1期18卷 1-27页

作者： Gurgul, Henryk Majdosz, Paweł Department of Applied Mathematics University of Science and Technology 30-059 Kraków ul. Al. Mickiewicza 30 Poland Department of Quantitative Methods School of Economics and Computer Science Kraków Poland

Although fund activities whose target is to attract the members of rivals would seem to be very important for a proper evaluation of pension fund achievements, this topic has not been looked at by researchers. This paper presents an approach to assess the interfund effects of savings transfers based upon Polish tables of transfers published by the KNUiFE over the period from the fourth quarter of 2001 to the first quarter of 2004. Some useful indicators are suggested. By means of these indicators a taxonomy of pension funds operating in Poland was carried out. We also find which transfers of savings are the most important, i.e. which changes in the relative level of such transfers cause the largest perturbations in the whole pension fund sector. © 2006 The International Input-Output Association.

关键词： Pension funds Savings' transfers Sensitivity matrix

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4.4.1 Fine-grained Method and Tool Integration for better Automotive Software

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INCOSE International Symposium 2006年第1期16卷 606-620页

作者： Altheide, Frank Buhr, Kerstin Doerr, Heiko University of Paderborn Workgroup Database and Information Systems Germany Technical University of Berlin Institute for Software Engineering and Theoretical Computer Science Germany DaimlerChrysler AG Research & Technology Department Methods & Tools Germany

In the automotive field, software development methods and tools are used to cope with the high complexity of automotive software development. However, problems occur with the tracing of information, the assessment and monitoring of the development status, late and thus expensive changes, etc, which lead to increasing development costs and time as well as quality deficits. Our experience with recent projects have shown that the key to solving these problems lies in providing proper answers to the following questions: (1) How can development methods be assembled? (2) How can the use of a variety of development methods be supported by an appropriate tool?. To answer these questions, we introduce a tool integration approach that is strongly based on the integration of development methods. The contribution of this paper is (a) a method integration approach that considers finegrained method objects and their specific structure in addition to the usually considered artifacts, (b) an approach to tool integration that overcomes the deficits of heterogeneous tool environments and utilizes the results of the methodical understanding. © 2006 The Authors.

关键词： Integration

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Correlation analysis algorithm based on low-rank approximation for multiple dimension data streams

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Tien Tzu Hsueh Pao/Acta Electronica Sinica 2006年第2期34卷 293-300页

作者： Wang, Yong-Li Xu, Hong-Bing Dong, Yi-Sheng Qian, Jiang-Bo Liu, Xue-Jun Department of Computer Science and Engineering Southeast University Nanjing 210096 China Department of Common Computer Teaching Jiamusi University Jiamusi 154007 China

Presently existing correlation analysis method for multiple data streams were all oriented single dimensions data streams only, which could not identify the real correlation between fields built by multiple variables. To quickly detect correlations between two multiple dimension data streams under constrained resources, a novel correlation analysis algorithm based on canonical correlation analysis (CCA), called StreamCCA, is proposed. Focusing on the computational bottleneck of traditional CCA, StreamCCA introduces a low-rank approximation technique to reduce the dimensionality of product matrix resulted from sample correlation matrix and sample variance matrix, which improves computational performance efficiently on the premise of holding approximate precision. Theoretic analysis and experiments results on synthetic and real data sets indicate that StreamCCA can online detect correlations between multiple dimension data streams accurately. The algorithms proposed herein, are presented as generic forecasting and diagnosis tools, with a multitude of applications on data streams mining problems.

关键词： Data mining

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