Open Access. Powered by Scholars. Published by Universities.®

Digital Commons Network™

Open Access. Powered by Scholars. Published by Universities.®

Singapore Management University

Discipline
Keyword
Publication Year
Publication
Publication Type
File Type

Articles 21871 - 21900 of 23193

Full-Text Articles in Entire DC Network

Profits In The Pie Of The Beholder, Daniel Corsten, Nirmalya Kumar May 2003

Profits In The Pie Of The Beholder, Daniel Corsten, Nirmalya Kumar

Research Collection Lee Kong Chian School Of Business

In the early 1990s, grocery suppliers and retailers joined forces to streamline operations - an initiative called "efficient consumer response." Today, suppliers feel like they're not getting their fair share of the profits from ECR. But they stand to lose more if they give up on it, the authors say.

Go to article

On Machine Learning Methods For Chinese Document Classification, Ji He, Ah-Hwee Tan, Chew-Lim Tan May 2003

On Machine Learning Methods For Chinese Document Classification, Ji He, Ah-Hwee Tan, Chew-Lim Tan

Research Collection School Of Computing and Information Systems

This paper reports our comparative evaluation of three machine learning methods, namely k Nearest Neighbor (kNN), Support Vector Machines (SVM), and Adaptive Resonance Associative Map (ARAM) for Chinese document categorization. Based on two Chinese corpora, a series of controlled experiments evaluated their learning capabilities and efficiency in mining text classification knowledge. Benchmark experiments showed that their predictive performance were roughly comparable, especially on clean and well organized data sets. While kNN and ARAM yield better performances than SVM on small and clean data sets, SVM and ARAM significantly outperformed kNN on noisy data. Comparing efficiency, kNN was notably more costly …

Go to article

Guest Editorial: Text And Web Mining, Ah-Hwee Tan, Philip S. Yu May 2003

Guest Editorial: Text And Web Mining, Ah-Hwee Tan, Philip S. Yu

Research Collection School Of Computing and Information Systems

Text mining and web mining are two interrelated fields that have received a lot of attention in recent years. Text mining [1, 2] is concerned with the analysis of very large document collections and the extraction of hidden knowledge from text-based data. Web mining [3] refers to the analysis and mining of all web-related data, including web content, hyperlink structure, and web access statistics.

Go to article

Extracting Policy Positions From Political Texts Using Words As Data, Michael Laver, Kenneth Benoit, John Garry May 2003

Extracting Policy Positions From Political Texts Using Words As Data, Michael Laver, Kenneth Benoit, John Garry

Research Collection School of Social Sciences

We present a new way of extracting policy positions from political texts that treats texts not as discourses to be understood and interpreted but rather, as data in the form of words. We compare this approach to previous methods of text analysis and use it to replicate published estimates of the policy positions of political parties in Britain and Ireland, on both economic and social policy dimensions. We “export” the method to a non-English-language environment, analyzing the policy positions of German parties, including the PDS as it entered the former West German party system. Finally, we extend its application beyond …

Go to article

Ts-Pwlan: A Value-Add System For Providing Tiered Wireless Services In Public Hot-Spots, Arup Acharya, Chatschik Bisdikian, Archan Misra, Young-Bae Ko May 2003

Ts-Pwlan: A Value-Add System For Providing Tiered Wireless Services In Public Hot-Spots, Arup Acharya, Chatschik Bisdikian, Archan Misra, Young-Bae Ko

Research Collection School Of Computing and Information Systems

Access to data services via wireless LANs at private (e.g., corporations or home) and public "hot-spot" (e.g., hotels and airports) setting is becoming a common place daily. Data access via (for profit) public wireless LAN (PWLAN) installations is typically based on user subscription and preconfigured services profiles pertaining primarily access to the global Internet. The goal of the ts-PWLAN project is to define an architecture and a prototype implementation that enables the provision of premium and non-premium tiers of services to transient and non-transient users. ts-PWLAN provides for dynamic renegotiations of tier of services and enables various billing modes, e.g., …

Go to article

On The Strategy Of Supply Hubs For Cost Reduction And Responsiveness, Earl Barnes, Jim Dai, Shijie Deng, Doug Down, Mark Goh, Hoong Chuin Lau, Sharafali Moosa May 2003

On The Strategy Of Supply Hubs For Cost Reduction And Responsiveness, Earl Barnes, Jim Dai, Shijie Deng, Doug Down, Mark Goh, Hoong Chuin Lau, Sharafali Moosa

Research Collection School Of Computing and Information Systems

A supply hub is a location generally close to a manufacturer’s facility where all or some of its supplies are warehoused with the agreement that the materials will be paid for only when consumed. Supply hub is an innovative strategy employed by especially the electronics industry to achieve cost reduction and improved responsiveness. After first tracing the developments leading to the establishment of supply hubs, the paper then describes the dynamics of the operation of supply hubs. Case examples are provided to highlight the current practices. Finally, some research issues are identified.

Go to article

On Querying Geospatial And Georeferenced Metadata Resources In Gportal, Zehua Liu, Ee Peng Lim, Wee-Keong Ng, Dion Hoe-Lian Goh May 2003

On Querying Geospatial And Georeferenced Metadata Resources In Gportal, Zehua Liu, Ee Peng Lim, Wee-Keong Ng, Dion Hoe-Lian Goh

Research Collection School Of Computing and Information Systems

G-Portal is a web portal system providing a range of digital library services to access geospatial and georeferenced resources on the Web. Among them are the storage and query subsystems that provide a central repository of metadata resources organized under different projects. In GPortal, all metadata resources are represented in XML (Extensible Markup Language) and they are compliant to some resource schemas de.ned by their creators. The resource schemas are extended versions of a basic resource schema making it easy to accommodate all kinds of metadata resources while maintaining the portability of resource data. To support queries over the geospatial …

Go to article

Catch-Up Growth Based On International Talent Mobility In An Idea-Based World, Yu Quan, Hian Teck Hoon May 2003

Catch-Up Growth Based On International Talent Mobility In An Idea-Based World, Yu Quan, Hian Teck Hoon

Research Collection School Of Economics

We show how catch-up growth can result when immigrant ties of talented people to their home countries facilitate technology diffusion from world technological leaders to developing countries. The aspect of immigrant link we focus on is knowledge spillover through various programs of international exchange to draw upon the expertise of the individuals who have migrated—a type of externality effect on the home country. In our model, we distinguish between public technology and private technology, both of which differ across countries. The size of the talent pool in each country determines the number of skilled workers and indigenous technology levels. The …

Go to article

Early Stopping By Using Stochastic Curtailment In A Three-Arm Sequential Trial, Denis H. Y. Leung, You-Gan Wang, David Amar May 2003

Early Stopping By Using Stochastic Curtailment In A Three-Arm Sequential Trial, Denis H. Y. Leung, You-Gan Wang, David Amar

Research Collection School Of Economics

Interim analysis is important in a large clinical trial for ethical and cost considerations. Sometimes, an interim analysis needs to be performed at an earlier than planned time point. In that case, methods using stochastic curtailment are useful in examining the data for early stopping while controlling the inflation of type I and type II errors. We consider a three-arm randomized study of treatments to reduce perioperative blood loss following major surgery. Owing to slow accrual, an unplanned interim analysis was required by the study team to determine whether the study should be continued. We distinguish two different cases: when …

Go to article

Factors Influencing Treatment Patterns In Breast Cancer Patients Age 75 And Over, Arti Hurria, Denis H. Y. Leung, Kathleen Trainor, Patrick Borgen, Larry Norton, Clifford Hudis May 2003

Factors Influencing Treatment Patterns In Breast Cancer Patients Age 75 And Over, Arti Hurria, Denis H. Y. Leung, Kathleen Trainor, Patrick Borgen, Larry Norton, Clifford Hudis

Research Collection School Of Economics

To retrospectively determine the factors influencing treatment decisions in older breast cancer patients at a single center. Experimental Design: 216 patients age > or = 75 seen in post-treatment follow-up between January, 1997 and June, 2000 were identified in the Memorial Sloan-Kettering breast cancer database. Eligible patients were > or = 75 years old at diagnosis, had a diagnosis of stage I, II, or III breast cancer, and received their follow-up care at Memorial Sloan Kettering Cancer Center. A retrospective chart review was performed. Patients were stratified by: (1) prognostic factors (age (75-79 or > or = 80), Charlson comorbidity score, tumor size, …

Go to article

Determinants Of Voluntary Job-To-Job Mobility, Xiaolin Xing, Zhenlin Yang May 2003

Determinants Of Voluntary Job-To-Job Mobility, Xiaolin Xing, Zhenlin Yang

Research Collection School Of Economics

This paper explores both observable and unobservable variables that would affect employed workers’ decisions on job change. A survey was conducted through one-to-one interviews, and the sample consists of 965 full-time employed workers. The logistic regression models are employed to analyze the two binary measures of job-to-job mobility: i) whether an individual is considering a job change, and ii) whether an individual is actively looking for another job. We find that age, job satisfaction, satisfaction with working environment or job security, and firm size are among the major factors determining workers’ job-to-job mobility. Younger workers and workers in smaller firms …

Go to article

Secure The Image-Based Simulated Telesurgery System, Yanjiang Yang, Zhenlan Wang, Feng Bao, Robert H. Deng May 2003

Secure The Image-Based Simulated Telesurgery System, Yanjiang Yang, Zhenlan Wang, Feng Bao, Robert H. Deng

Research Collection School Of Computing and Information Systems

Telemedicine services involve transmission of patient data over open computer network, and thus confront serious security challenges when the consequences are a matter of life and death. In this paper, we introduce an image-based simulated system for kyphoplasty telesurgery, wherein special attention is given to the fine-grained security implementation issues. Various security requirements are formalized and corresponding solutions are presented. Consequently, we implement the system to work in a secure way, while taking efficiency as a premier consideration.

Go to article

Tactics-Based Remote Execution For Mobile Computing, Rajesh Krishna Balan, Mahadev Satayanarayana, Soyoung Park, Tadashi Okoshi May 2003

Tactics-Based Remote Execution For Mobile Computing, Rajesh Krishna Balan, Mahadev Satayanarayana, Soyoung Park, Tadashi Okoshi

Research Collection School Of Computing and Information Systems

Remote execution can transform the puniest mobile device into a computing giant able to run resource-intensive applications such as natural language translation, speech recognition, face recognition, and augmented reality. However, easily partitioning these applications for remote execution while retaining application-specific information has proven to be a difficult challenge. In this paper, we show that automated dynamic repartitioning of mobile applications can be reconciled with the need to exploit application-specific knowledge. We show that the useful knowledge about an application relevant to remote execution can be captured in a compact declarative form calledtactics. Tactics capture the full range of meaningful partitions …

Go to article

Corporate Social Responsibility Reputation Effects On Mba Job Choice, David B. Montgomery, Catherine A. Ramus May 2003

Corporate Social Responsibility Reputation Effects On Mba Job Choice, David B. Montgomery, Catherine A. Ramus

Research Collection Lee Kong Chian School Of Business

In a preliminary study with 279 MBA’s from two European and three North American business schools we find that reputation-related attributes of caring about employees, environmental sustainability, community/ stakeholder relations, and ethical products and services are important in job choice decisions. We use an adaptive conjoint analysis survey tool to discover the relative weighting of a new set of social responsibility job search criteria, including these attributes with traditional job search criteria like financial package, geographical location, etc. In addition, our results show that more than ninety percent of the MBAs in the sample were willing to forgo financial benefits …

Go to article

International Developments In Mediation (Internationale Entwicklungen Der Gerichtsnahen Mediation), Nadja Alexander May 2003

International Developments In Mediation (Internationale Entwicklungen Der Gerichtsnahen Mediation), Nadja Alexander

Research Collection Yong Pung How School Of Law

No abstract provided.

Go to article

Professor David B. Montgomery Appointed Dean Of School Of Business At Singapore Management University, Singapore Management University Apr 2003

Professor David B. Montgomery Appointed Dean Of School Of Business At Singapore Management University, Singapore Management University

SMU Press Releases and News

No abstract provided.

Go to article

Efficient Native Xml Storage System (Enaxs), Khin-Myo Win, Wee-Keong Ng, Ee Peng Lim Apr 2003

Efficient Native Xml Storage System (Enaxs), Khin-Myo Win, Wee-Keong Ng, Ee Peng Lim

Research Collection School Of Computing and Information Systems

XML is a self-describing meta-language and fast emerging as a dominant standard for Web data exchange among various applications. With the tremendous growth of XML documents, an efficient storage system is required to manage them. The conventional databases, which require all data to adhere to an explicitly specified rigid schema, are unable to provide an efficient storage for tree-structured XML documents. A new data model that is specifically designed for XML documents is required. In this paper, we propose a new storage system, named Efficient Native XML Storage System (ENAXS), for large and complex XML documents. ENAXS stores all XML …

Go to article

The Evolution Of Party Systems Between Elections, Michael Laver, Kenneth Benoit Apr 2003

The Evolution Of Party Systems Between Elections, Michael Laver, Kenneth Benoit

Research Collection School of Social Sciences

Most existing theoretical work on party competition pays little attention to the evolution of party systems between elections as a result of defections between parties. In this article, we treat individual legislators as utility-maximizing agents tempted to defect to other parties if this would increase their expected payoffs. We model the evolution of party systems between elections in these terms and discuss this analytically, exploring unanswered questions using computational methods. Under office-seeking motivational assumptions, our results strikingly highlight the role of the largest party, especially when it is “dominant” in the technical sense, as a pole of attraction in interelectoral …

Go to article

Commune-Level Poverty Estimates And Ground Truthing, Tomoki Fujii Apr 2003

Commune-Level Poverty Estimates And Ground Truthing, Tomoki Fujii

Research Collection School Of Economics

The United Nations World Food Programme (WFP) Cambodia, in close collaboration with various government institutions, has been conducting poverty analysis and mapping refinement. The main objectives of the refinement have been (i) to refine core poor areas in Cambodia, (ii) to identify priority areas for social sector interventions such as those targeted to adult and child education, health and nutrition interventions, and (iii) to identify priority areas for assisting variable population groups such as those in flood and drought prone areas, forest and fishing concession areas.

Go to article

A Score Test For Box-Cox Functional Form, Zhenlin Yang, Tilak Abeysinghe Apr 2003

A Score Test For Box-Cox Functional Form, Zhenlin Yang, Tilak Abeysinghe

Research Collection School Of Economics

This paper presents two score tests to determine a value for the Box-Cox transformation parameter. The test based on expected information performs better in small samples and is computationally simpler than the one based on observed information; therefore, the former is recommended.

Go to article

Building Customer Trust In Mobile Commerce, Keng Siau, Zixing Shen Apr 2003

Building Customer Trust In Mobile Commerce, Keng Siau, Zixing Shen

Research Collection School Of Computing and Information Systems

Customer trust, which is crucial for the growth and success of mobile commerce, is discussed. Building customer trust is a complex process that involves technology and business practices as well as movement from initial trust formation to continuous trust development. Gaining customer trust involves consideration of its three components: competence trust, predictability trust and goodwill trust. From a customer's perspective, competence trust in e-commerce is built upon the Internet vendor's skills, expertise and operational abilities.

Go to article

Earnings Momentum In International Markets, Dong Hong, Charles M. C. Lee, Bhaskaran Swaminathan Apr 2003

Earnings Momentum In International Markets, Dong Hong, Charles M. C. Lee, Bhaskaran Swaminathan

Research Collection Lee Kong Chian School Of Business

This paper examines the profitability of earnings momentum strategies based on analyst forecast revisions in eleven international equity markets. While analyst forecast revisions exhibit persistence in all countries, the profitability of trading strategies based on these revisions varies. Specifically, earnings momentum yields significant profits in Australia, Canada, France, Germany, Hong Kong, and the United Kingdom, but not in Malaysia, South Korea, Japan, Singapore, or Taiwan. Interestingly, price momentum exists only in those countries where earnings momentum is profitable. In general, markets with high levels of corruption (low investor protection) exhibit weak momentum. Collectively, these findings suggest that the momentum phenomenon …

Go to article

Applicant Perceptions Of Selection Procedures: The Role Of Selection Information, Belief In Tests, And Comparative Anxiety, Filip Lievens, Wilfried De Corte, Katrien Brysse Mar 2003

Applicant Perceptions Of Selection Procedures: The Role Of Selection Information, Belief In Tests, And Comparative Anxiety, Filip Lievens, Wilfried De Corte, Katrien Brysse

Research Collection Lee Kong Chian School Of Business

This study addresses the effects of the provision of information on the reliability and validity of selection procedures and the effects of test-taker attitudes (i.e., belief in tests and comparative anxiety) on fairness perceptions. Prior to an actual selection process, applicants (N = 118) were given either information about the reliability and validity of various selection procedures or no information. Next, they evaluated the fairness of eight selection procedures. No significant effect of selection information was found. Belief in tests had significant effects, with applicants high on test belief giving higher fairness ratings than applicants low on test belief. In …

Go to article

The Relation Of Instrumental And Symbolic Attributes To A Company's Attractiveness As An Employer, Filip Lievens, Scott Highhouse Mar 2003

The Relation Of Instrumental And Symbolic Attributes To A Company's Attractiveness As An Employer, Filip Lievens, Scott Highhouse

Research Collection Lee Kong Chian School Of Business

This study adds a new marketing-based angle to the study of the attractiveness of organizations in the early stages of the recruitment process. Drawing on the instrumental-symbolic framework from the marketing literature, we expected that the meanings (in terms of inferred traits) that prospective applicants associate with employing organizations would play an important role in applicants' attractiveness to these organizations. Two groups of prospective applicants (275 final-year students and 124 bank employees) were drawn from the applicant population targeted by the bank industry. These applicants were asked to rate a randomly assigned bank in terms of job/organizational factors and to …

Go to article

A Practical Procedure To Estimate The Quality And The Adverse Impact Of Single-Stage Selection Decisions, Wilfried De Corte, Filip Lievens Mar 2003

A Practical Procedure To Estimate The Quality And The Adverse Impact Of Single-Stage Selection Decisions, Wilfried De Corte, Filip Lievens

Research Collection Lee Kong Chian School Of Business

The quandary posed by the conflicting goals of valid selection and a diverse workforce is one of the most perplexing problems facing the practice of personnel selection today. To help address the issue, the article presents a comprehensive method and a related computer program to estimate the expected adverse impact and the expected quality of the majority, the minority and the total selected work force. Compared to previous related procedures, the present method is much more general as it can address situations with both multiple predictor and multiple criterion dimensions. In addition, the expected effects can be computed given the …

Go to article

Markov Switching Garch Models Of Currency Crises In Southeast Asia, Celso Brunetti, Roberto S. Mariano, Chiara Scotti, Augustine H. H. Tan Mar 2003

Markov Switching Garch Models Of Currency Crises In Southeast Asia, Celso Brunetti, Roberto S. Mariano, Chiara Scotti, Augustine H. H. Tan

Research Collection School Of Economics

This paper develops a model which is able to forecast exchange rate turmoil. Our starting point relies on the empirical evidence that exchange rate volatility is not constant. In fact, the modeling strategy adopted refers to the vast literature of the GARCH class of models, where the variance process is explicitly modeled. Further empirical evidence shows that it is possible to distinguish between two different regimes: îordinaryî versus îturbulenceî. Low exchange rate changes are associated with low volatility (ordinary regime) and high exchange rate devaluations go together with high volatility. This calls for a regime switching approach. In our model …

Go to article

Market Structure And Performance: An Anti-Trust Story Of Endogenous Growth, Hing-Man Leung Mar 2003

Market Structure And Performance: An Anti-Trust Story Of Endogenous Growth, Hing-Man Leung

Research Collection School Of Economics

Since Schumpeter, a major concern has been: what monopoly does to growth? Monopoly’s static, allocative inefficiency is well established. How much this is offset by its dynamic progressiveness is unclear. First, using the empirical literature, we argue that the presumed progressiveness of monopoly must be rejected. Second, we extend the endogenous growth model to obtain a full Pareto ranking of competition, monopoly, Cournot and Bertrand. Competition beats Cournot, which in turn beats monopoly. Growth rate is invariant with structures, which accords well with empirical evidence. Bertrand happens to share the ranking with competition. The findings have a strong anti-trust overtone.

Go to article

Business And Global Governance: The Growing Role Of Corporate Codes Of Conduct, Ann Florini Mar 2003

Business And Global Governance: The Growing Role Of Corporate Codes Of Conduct, Ann Florini

Research Collection School of Social Sciences

These are, in many ways, halcyon days for global business. In a vast ideological shift in the late 20th century, markets rather than governments came to be seen as the road to prosperity. Governments that once nationalized foreign firms now seek out the investment, technology, and managerial expertise such companies can bring. The halls of the United Nations used to ring with calls for international regulation of those dreaded evil-doers, the multinational corporations. Now the UN instead implores business to join with it in a voluntary Global Compact to ensure respect for internationally agreed environmental, labor, and human rights standards.

Go to article

Stegfs: A Steganographic File System, Hwee Hwa Pang, Kian-Lee Tan, Xuan Zhou Mar 2003

Stegfs: A Steganographic File System, Hwee Hwa Pang, Kian-Lee Tan, Xuan Zhou

Research Collection School Of Computing and Information Systems

While user access control and encryption can protect valuable data from passive observers, those techniques leave visible ciphertexts that are likely to alert an active adversary to the existence of the data, who can then compel an authorized user to disclose it. This paper introduces StegFS, a steganographic file system that aims to overcome that weakness by offering plausible deniability to owners of protected files. StegFS securely hides user-selected files in a file system so that, without the corresponding access keys, an attacker would not be able to deduce their existence, even if the attacker is thoroughly familiar with the …

Go to article

Health Care Informatics, Keng Siau Mar 2003

Health Care Informatics, Keng Siau

Research Collection School Of Computing and Information Systems

The health care industry is currently experiencing a fundamental change. Health care organizations are reorganizing their processes to reduce costs, be more competitive, and provide better and more personalized customer care. This new business strategy requires health care organizations to implement new technologies, such as Internet applications, enterprise systems, and mobile technologies in order to achieve their desired business changes. This article offers a conceptual model for implementing new information systems, integrating internal data, and linking suppliers and patients.

Go to article

First Prev Next Last