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Ontology-Assisted Mining Of Rdf Documents, Tao Jiang, Ah-Hwee Tan Jan 2005

Ontology-Assisted Mining Of Rdf Documents, Tao Jiang, Ah-Hwee Tan

Research Collection School Of Computing and Information Systems

Resource description framework (RDF) is becoming a popular encoding language for describing and interchanging metadata of web resources. In this paper, we propose an Apriori-based algorithm for mining association rules (AR) from RDF documents. We treat relations (RDF statements) as items in traditional AR mining to mine associations among relations. The algorithm further makes use of a domain ontology to provide generalization of relations. To obtain compact rule sets, we present a generalized pruning method for removing uninteresting rules. We illustrate a potential usage of AR mining on RDF documents for detecting patterns of terrorist activities. Experiments conducted based on …

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Technology Competition And Optimal Investment Timing: A Real Options Perspective, Robert J. Kauffman, X. Li Jan 2005

Technology Competition And Optimal Investment Timing: A Real Options Perspective, Robert J. Kauffman, X. Li

Research Collection School Of Computing and Information Systems

Companies often choose to defer irreversible investments to maintain valuable managerial flexibility in an uncertain world. For some technology-intensive projects, technology uncertainty plays a dominant role in affecting investment timing. This article analyzes the investment timing strategy for a firm that is deciding about whether to adopt one or the other of two incompatible and competing technologies.We develop a continuous-time stochastic model that aids in the determination of optimal timing for managerial adoption within the framework of real options theory. The model captures the elements of the decision-making process in such a way so as to provide managerial guidance in …

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Optimal Location Of Intermodal Freight Hubs, Illia Racunica, Laura Wynter Jan 2005

Optimal Location Of Intermodal Freight Hubs, Illia Racunica, Laura Wynter

Research Collection School Of Computing and Information Systems

We present an optimization model that has been developed to address the problem of increasing the share of rail in intermodal transport through the use of hub-and-spoke type networks for freight rail. The model defined is a generalization of the hub location problem in that it allows for non-linear and concave cost functions on different segments. A linearization procedure along with two efficient variable-reduction heuristics was developed for its resolution, making use of recent results on polyhedral properties of this class of problems. Computational experience and a qualitative analysis from a case study on the Alpine freight network is provided.

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Transborder Industrialization And Singapore's Suzhou 'Experiment': A Paradox Of Context?, Lu Gao, Wee Tan, Caroline Yeoh Jan 2005

Transborder Industrialization And Singapore's Suzhou 'Experiment': A Paradox Of Context?, Lu Gao, Wee Tan, Caroline Yeoh

Research Collection Lee Kong Chian School Of Business

No abstract provided.

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Strategic Management For Economic Development: Remaking The Singapore 'Model', Caroline Yeoh, Wilfred Pow Ngee How Jan 2005

Strategic Management For Economic Development: Remaking The Singapore 'Model', Caroline Yeoh, Wilfred Pow Ngee How

Research Collection Lee Kong Chian School Of Business

The dynamics of international economic competition have far-reaching policy implications for both developing and developed countries. Established industrial and trade policy regimes in most countries are under tremendous strain, and this applies even to the dynamic Newly Industrialising Economies (NIEs). The outward-oriented development strategies of the Asian NIEs, which once seemed unbeatable, have run up against protectionist barriers in the developed countries, and increasingly, against competitive pressures from other up and coming developing countries. Governments in these NIEs have had to re-examine accustomed policies and strategies, and search for alternative strategies and programs, in order to re-position their economies for …

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Pierre Bayle's Philosophical Commentary On The Words Of Jesus Christ: Compel Them To Come In, John Kilcullen, Chandran Kukathas Jan 2005

Pierre Bayle's Philosophical Commentary On The Words Of Jesus Christ: Compel Them To Come In, John Kilcullen, Chandran Kukathas

Research Collection School of Social Sciences

In this defence of religious toleration, Bayle discusses the words attributed to Jesus Christ in Luke 14:23, “And the Lord said unto the servant, Go out into the highways and hedges, and compel them to come in, that my house may be full.” Bayle contends that the word compel cannot mean “force.” From this perspective, he constructs his doctrine of toleration based on the singular importance of conscience. Bayle argues that if the orthodox have the right and duty to persecute, then every sect will persecute since every sect considers itself orthodox. The result will be mutual slaughter, something God …

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Integrating Business Opportunities In Contiguous Economies: A Note On The Low-Cost Manufacturing Enclaves In Batam Island, Indonesia, Wee Tan, Caroline Yeoh, Kevin Wongso Jan 2005

Integrating Business Opportunities In Contiguous Economies: A Note On The Low-Cost Manufacturing Enclaves In Batam Island, Indonesia, Wee Tan, Caroline Yeoh, Kevin Wongso

Research Collection Lee Kong Chian School Of Business

No abstract provided.

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Regional Co-Operation And Low-Cost Investment Enclaves: An Empirical Study Of Singapore's Industrial Parks In Riau, Indonesia, Caroline Yeoh, Darren Lim, Adeline Kwan Jan 2005

Regional Co-Operation And Low-Cost Investment Enclaves: An Empirical Study Of Singapore's Industrial Parks In Riau, Indonesia, Caroline Yeoh, Darren Lim, Adeline Kwan

Research Collection Lee Kong Chian School Of Business

Infrastructure can be unreliable and administration subject to corruption in Asia's rapidly developing economies. Foreign investment is thus drawn to privileged investment enclaves, as well as in and around centers of international infrastructure. This context provides opportunity for Singapore-styled industrial parks, through the provision of superior infrastructure, the ability to negotiate investment concessions at inter-government level and, where existing, through the links to influential Chinese business groups in the investment location. Batamindo Industrial Park and Bintan Industrial Estate in Indonesia were the prototypes. This paper revisits the Parks, and offers a stock-take on the challenges confronting these flagship projects. Evidence …

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Future Job Prospects In Singapore, Hian Teck Hoon Jan 2005

Future Job Prospects In Singapore, Hian Teck Hoon

Research Collection School Of Economics

What forces have shaped our nation’s employment and remuneration record so far? Where is Singapore’s unemployment rate headed? What should policy-makers do about it? These are the questions tackled in this paper.

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Education, Technological Progress And Economic Growth, Winston T. H. Koh, Hing-Man Leung Jan 2005

Education, Technological Progress And Economic Growth, Winston T. H. Koh, Hing-Man Leung

Research Collection School Of Economics

An important role of education – and the resultant accumulation of human capital – for a less-developed economy is to facilitate technology diffusion in order for it to catch up with developed economies. This paper presents a model linking education, the accumulation of physical capital and technological progress. In the model, investment in education and the accumulation of physical capital are complementary, and intertwine with the technology progress through related effects on technology diffusion and the expansion of the technology frontier. The allocation of effort to education, the optimal savings rate and the technology gap are endogenously determined in the …

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An Analytical Framework Of Science Parks And Technology Districts With An Application To Singapore, Francis Koh, Winston T. H. Koh, Ted Feichin Tschang Jan 2005

An Analytical Framework Of Science Parks And Technology Districts With An Application To Singapore, Francis Koh, Winston T. H. Koh, Ted Feichin Tschang

Research Collection School Of Economics

This paper analyzes the question: What does it take for science parks and technology districts to evolve and grow? We propose an analytical framework to examine the gestation, evolution, and sustainability of science parks and related but broader regional phenomena such as technology districts. The framework comprises three aspects of a science park's development: growth mechanisms, level of technological capabilities, and nature of its integration with national or global markets. The main growth mechanisms we identify are government-led infrastructure provision, agglomeration effects, and continual self-renewal through the creation of new businesses. We apply this framework to analyze Singapore's science park …

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Future Job Prospects In Singapore, Hian Teck Hoon Jan 2005

Future Job Prospects In Singapore, Hian Teck Hoon

Research Collection School Of Economics

No abstract provided.

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Regionalisation And Singapore's Transborder Industrialisation: A New Perspective On Suzhou Industrial Park, Xun Cai, Lu Gao, Caroline Yeoh Jan 2005

Regionalisation And Singapore's Transborder Industrialisation: A New Perspective On Suzhou Industrial Park, Xun Cai, Lu Gao, Caroline Yeoh

Research Collection Lee Kong Chian School Of Business

The dynamics of international economic competition have prompted governments to re-examine accustomed policies, and search for alternative strategies, in order to re-position their economies for the future. This paper takes a look at Singapore’s search for a competitive positioning in the global marketplace, and focuses on the city-state’s much-publicized, and controversial, flagship project in China, viz, the Suzhou Industrial Park (SIP). This strategic initiative is premised on the perceptions that Singapore’s positive reputation with multinational corporations, and ‘guanxi’ (or connections) with regional governments, will give the regional sites a strategic advantage in the competition for foreign investments. Earlier studies have …

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Contract Law, Chee Ho Tham, Pearlie Koh, Pey Woan Lee Jan 2005

Contract Law, Chee Ho Tham, Pearlie Koh, Pey Woan Lee

Research Collection Yong Pung How School Of Law

The rudimentary principle that a contract is only concluded upon the unconditional acceptance of an offer was applied in Koon Seng Construction Pte Ltd v Siem Seng Hing & Co (Pte) Ltd [2005] SGHC 8, where the alleged contract failed in the absence of an unqualified acceptance.

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Facing China: Taiwan’S Status As A Separate Customs Territory In The World Trade Organization, Pasha L. Hsieh Jan 2005

Facing China: Taiwan’S Status As A Separate Customs Territory In The World Trade Organization, Pasha L. Hsieh

Research Collection Yong Pung How School Of Law

On Nov 11, 2001, in Doha, Qatar, the Fourth Ministerial Conference of the World Trade Organization (WTO) unanimously approved Taiwan's application for WTO membership, just 24 hours after approving China's admission. Taiwan's choice as the Separate Customs Territory of Taiwan, Penghu, Kinmen and Matsu, abbreviated as Chinese Taipei, in the WTO, instead of its official name, Republic of China (PRC), shows its reluctant compromise with political reality. The PRC's claim that accession procedures applying to Taiwan and Hong Kong should be identical erroneous because, under international trade law, the ROC is the automatic government acting on behalf of Taiwan and …

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Applying Scenario-Based Design And Claim Analysis To The Design Of A Digital Library Of Geography Examination Resources, Yin-Leng Theng, Dion Hoe-Lian Goh, Ee Peng Lim, Zehua Liu, Ming Yin, Natalie Lee-San Pang, Patricia Bao-Bao Wong Jan 2005

Applying Scenario-Based Design And Claim Analysis To The Design Of A Digital Library Of Geography Examination Resources, Yin-Leng Theng, Dion Hoe-Lian Goh, Ee Peng Lim, Zehua Liu, Ming Yin, Natalie Lee-San Pang, Patricia Bao-Bao Wong

Research Collection School Of Computing and Information Systems

This paper describes the application of Carroll’s scenario-based design and claims analysis as a means of refinement to the initial design of a digital library of geographical resources (GeogDL) to prepare Singapore students to take a national examination in geography. GeogDL is built on top of G-Portal, a digital library providing services over geospatial and georeferenced Web content. Beyond improving the initial design of GeogDL, a main contribution of the paper is making explicit the use of Carroll’s strong theory-based but undercapitalized scenario-based design and claims analysis that inspired recommendations for the refinement of GeogDL. The paper concludes with an …

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A Multi-Agent Approach For Solving Optimization Problems Involving Expensive Resources, Hoong Chuin Lau, H. Wang Jan 2005

A Multi-Agent Approach For Solving Optimization Problems Involving Expensive Resources, Hoong Chuin Lau, H. Wang

Research Collection School Of Computing and Information Systems

In this paper, we propose a multi-agent approach for solving a class of optimization problems involving expensive resources, where monolithic local search schemes perform miserably. More specifically, we study the class of bin-packing problems. Under our proposed Fine-Grained Agent System scheme, rational agents work both collaboratively and selfishly based on local search and mimic physics-motivated systems. We apply our approach to a generalization of bin-packing - the Inventory Routing Problem with Time Windows - which is an important logistics problem, and demonstrate the efficiency and effectiveness of our approach.

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Residual Life Distributions From Component Degradation Signals: A Bayesian Approach, Nagi Gebraeel, Mark Lawley, Rong Li, Jennifer Ryan Jan 2005

Residual Life Distributions From Component Degradation Signals: A Bayesian Approach, Nagi Gebraeel, Mark Lawley, Rong Li, Jennifer Ryan

Research Collection Lee Kong Chian School Of Business

No abstract provided.

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Systems Analysis And Design: Should We Be Researching What We Teach?, A. Bajaj, D. Batra, A. Hevner, J. Parsons, Keng Siau Jan 2005

Systems Analysis And Design: Should We Be Researching What We Teach?, A. Bajaj, D. Batra, A. Hevner, J. Parsons, Keng Siau

Research Collection School Of Computing and Information Systems

A guiding premise of academic scholarship is that knowledge gained from first-hand research experience is disseminated to students via the classroom. However, that valuable connection is lost when professors are not researching what they teach. In this paper, we explore issues of mismatch between teaching and research in the Information Systems (IS) discipline. Specifically, while systems analysis and design (SA&D) is an integral topic in IS curricula, this topic is the research specialty of few IS professors. This situation is reflected by the low number of research publications in this area; particularly in the leading mainstream IS journals. We characterize …

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Robust Temporal Constraint Networks, Hoong Chuin Lau, Thomas Ou, Melvyn Sim Jan 2005

Robust Temporal Constraint Networks, Hoong Chuin Lau, Thomas Ou, Melvyn Sim

Research Collection School Of Computing and Information Systems

In this paper, we propose the Robust Temporal Constraint Network (RTCN) model for simple temporal constraint networks where activity durations are bounded by random variables. The problem is to determine whether such temporal network can be executed with failure probability less than a given 0 ≤ E ≤ 1 for each possible instantiation of the random variables, and if so. how one might find a feasible schedule with each given instantiation. The advantage of our model is that one can vary the value of ∊ to control the level of conservativeness of the solution. We present a computationally tractable and …

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Analysis And Insights From A Dynamical Model Of Nuclear Plant Safety Risk, Stephen Hess, Alfonso M. Albano, John Gaertner Jan 2005

Analysis And Insights From A Dynamical Model Of Nuclear Plant Safety Risk, Stephen Hess, Alfonso M. Albano, John Gaertner

Research Collection School of Social Sciences

In this paper, we expand upon previously reported results of a dynamical systems model for the impact of plant processes and programmatic performance on nuclear plant safety risk. We utilize both analytical techniques and numerical simulations typical of the analysis of nonlinear dynamical systems to obtain insights important for effective risk management. This includes use of bifurcation diagrams to show that period doubling bifurcations and regions of chaotic dynamics can occur. We also investigate the impact of risk mitigating functions (equipment reliability and loss prevention) on plant safety risk and demonstrate that these functions are capable of improving risk to …

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Human Mental Models Of Humanoid Robots, Sau-Lai Lee, Ivy Yee-Man Lau, Sara Kiesler, Chi-Yue Chiu Jan 2005

Human Mental Models Of Humanoid Robots, Sau-Lai Lee, Ivy Yee-Man Lau, Sara Kiesler, Chi-Yue Chiu

Research Collection School of Social Sciences

Effective communication between a person and a robot may depend on whether there exists a common ground of understanding between the two. In two experiments modelled after human-human studies we examined how people form a mental model of a robot's factual knowledge. Participants estimated the robot's knowledge by extrapolating from their own knowledge and from information about the robot's origin and language. These results suggest that designers of humanoid robots must attend not only to the social cues that robots emit but also to the information people use to create mental models of a robot.

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An Analytical Framework For Science Parks And Technology Districts With An Application To Singapore, Cher Chiew Francis Koh, Teow Hock Winston Koh, Feichin Ted Tschang Dec 2004

An Analytical Framework For Science Parks And Technology Districts With An Application To Singapore, Cher Chiew Francis Koh, Teow Hock Winston Koh, Feichin Ted Tschang

Research Collection Lee Kong Chian School Of Business

This paper analyzes the question: what does it take for science parks and technology districts to evolve and grow? We propose an analytical framework to examine the gestation, evolution and sustainability of science parks and regional phenomena at a broader scale such as technology districts. The framework comprises three aspects of a science park's development: growth mechanisms, level of technological capabilities, and integration with national or global markets. The main growth mechanisms we identify are government-led infrastructure provision, agglomeration effects and continual self-renewal through the creation of new businesses. We apply this framework to analyze Singapore's science park strategy and …

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Justilm: Few-Shot Justification Generation For Explainable Fact-Checking Of Real-World Claims, Fengzhu Zeng, Wei Gao Dec 2004

Justilm: Few-Shot Justification Generation For Explainable Fact-Checking Of Real-World Claims, Fengzhu Zeng, Wei Gao

Research Collection School Of Computing and Information Systems

Justification is an explanation that supports the verdict assigned to a claim in fact-checking. However, the task of justification generation is previously oversimplified as summarization of fact-check article authored by professional checkers. In this work, we propose a realistic approach to generate justification based on retrieved evidence. We present a new benchmark dataset called ExClaim for Explainable Claim verification, and introduce JustiLM, a novel few-shot retrieval-augmented language model to learn justification generation by leveraging fact-check articles as auxiliary resource during training. Our results show that JustiLM outperforms in-context learning (ICL)-enabled LMs including Flan-T5 and Llama2, and the retrieval-augmented model Atlas …

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Method For Identifying Individuals, Manoj Thulasidas Dec 2004

Method For Identifying Individuals, Manoj Thulasidas

Research Collection School Of Computing and Information Systems

A method and system for identifying a subject comprises obtaining a digitised recording of an electrocardiogram measurement of the subject to be identified, the digitised recording being a cyclic waveform having a peak amplitude. The digitised recording is normalised to reduce variations due to physiological effects, and the normalised recording is processed to determine a feature vector in the frequency domain. The distance between the determined feature vector and a predetermined feature vector is measured to identify the subject.

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Supporting Field Study With Personalized Project Spaces In A Geographical Digital Library, Ee Peng Lim, Aixin Sun, Zehua Liu, John Hedberg, Chew-Hung Chang, Tiong-Sa Teh, Dion Hoe-Lian Goh, Yin-Leng Theng Dec 2004

Supporting Field Study With Personalized Project Spaces In A Geographical Digital Library, Ee Peng Lim, Aixin Sun, Zehua Liu, John Hedberg, Chew-Hung Chang, Tiong-Sa Teh, Dion Hoe-Lian Goh, Yin-Leng Theng

Research Collection School Of Computing and Information Systems

Digital libraries have been rather successful in supporting learning activities by providing learners with access to information and knowledge. However, this level of support is passive to learners and interactive and collaborative learning cannot be easily achieved. In this paper, we study how digital libraries could be extended to serve a more active role in collaborative learning activities. We focus on developing new services to support a common type of learning activity, field study, in a geospatial context. We propose the concept of personal project space that allows individuals to work in their personalized environment with a mix of private …

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High Performance P300 Speller For Brain-Computer Interface, Cuntai Guan, Manoj Thulasidas, Jiankang Wu Dec 2004

High Performance P300 Speller For Brain-Computer Interface, Cuntai Guan, Manoj Thulasidas, Jiankang Wu

Research Collection School Of Computing and Information Systems

P300 speller is a communication tool with which one can input texts or commands to a computer by thought. The amplitude of the P300 evoked potential is inversely proportional to the probability of infrequent or task-related stimulus. In existing P300 spellers, rows and columns of a matrix are intensified successively and randomly, resulting in a stimulus frequency of 1/N (N is the number of rows or columns of the matrix). We propose a new paradigm to display each single character randomly and individually (therefore reducing the stimulus frequency to 1/(N*N)). On-line experiments showed that this new speller significantly improved the …

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Theoretical And Practical Complexity Of Unified Modeling Language: Delphi Study And Metrics Analyses, J. Erickson, Keng Siau Dec 2004

Theoretical And Practical Complexity Of Unified Modeling Language: Delphi Study And Metrics Analyses, J. Erickson, Keng Siau

Research Collection School Of Computing and Information Systems

Systems have become increasingly complex, and as a result development methods have become more complex as well. The unified modeling language (UML) has been criticized for the often cited and sometimes over- whelming complexity it presents to its users, and those seeking to learn to use it. Using Rossi and Brinkkemper’s (1996) complexity metrics, Siau and Cao (2001) completed a complexity analysis of UML and 36 other modeling techniques, finding that UML is indeed more complex than other techniques. Siau, Erickson and Lee (2002) proposed that Rossi and Brinkkemper’s metrics present the theoretical maximum complexity, known as theoretical complexity. This …

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Easing The Inferential Leap In Competency Modeling: The Effects Of Task-Related Information And Subject Matter Expertise, Filip Lievens, Juan I. Sanchez, Wilfred De Corte Dec 2004

Easing The Inferential Leap In Competency Modeling: The Effects Of Task-Related Information And Subject Matter Expertise, Filip Lievens, Juan I. Sanchez, Wilfred De Corte

Research Collection Lee Kong Chian School Of Business

Despite the rising popularity of the practice of competency modeling, research on competency modeling has lagged behind. This study begins to close this practice-science gap through 3 studies (1 lab study and 2 field studies), which employ generalizability analysis to shed light on (a) the quality of inferences made in competency modeling and (b) the effects of incorporating elements of traditional job analysis into competency modeling to raise the quality of competency inferences. Study 1 showed that competency modeling resulted in poor interrater reliability and poor between-job discriminant validity amongst inexperienced raters. In contrast, Study 2 suggested that the quality …

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Analytically Calibrated Box-Cox Percentile Limits For Duration And Event-Time Models, Zhenlin Yang, Albert K.C. Tsui Dec 2004

Analytically Calibrated Box-Cox Percentile Limits For Duration And Event-Time Models, Zhenlin Yang, Albert K.C. Tsui

Research Collection School Of Economics

This paper proposes a unified approach to constructing confidence limits for a future percentile duration or event-time. The construction is based on an analytical calibration of the Box-Cox-type “plug-in” percentile limits (PL). The performance of the calibrated Box-Cox PL is investigated using Monte Carlo experiments. Comparisons are made with PLs that are specifically designed for a particular distribution such as Weibull and lognormal. Excellent performances of the calibrated Box-Cox PL are observed. Simulation based on other popular duration models such as gamma and inverse Gaussian reveal that the proposed PL is robust against distributional assumptions and that it performs much …

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