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A Hybrid Scatter Search/Electromagnetism Meta-Heuristic For Project Scheduling, Dieter Debels, Bert De Reyck, Roel Leus, Mario Vanhoucke Mar 2006

A Hybrid Scatter Search/Electromagnetism Meta-Heuristic For Project Scheduling, Dieter Debels, Bert De Reyck, Roel Leus, Mario Vanhoucke

Research Collection Lee Kong Chian School Of Business

In the last few decades, several effective algorithms for solving the resource-constrained project scheduling problem have been proposed. However, the challenging nature of this problem, summarised in its strongly NP-hard status, restricts the effectiveness of exact optimisation to relatively small instances. In this paper, we present a new meta-heuristic for this problem, able to provide near-optimal heuristic solutions for relatively large instances. The procedure combines elements from scatter search, a generic population-based evolutionary search method, and from a recently introduced heuristic method for the optimisation of unconstrained continuous functions based on an analogy with electromagnetism theory. We present computational …

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Accounting Students' Perceptions Of A Learning Management System: An International Comparison, Illias Basioudis, Paul De Lange, Themin Suwardy, Paul Wells Mar 2006

Accounting Students' Perceptions Of A Learning Management System: An International Comparison, Illias Basioudis, Paul De Lange, Themin Suwardy, Paul Wells

Research Collection School Of Accountancy

The impact and use of technology on learning outcomes for accounting students is not well understood. This study investigated impact of design features of an ‘off the shelf’ Learning Management System (LMS) in teaching undergraduate accounting students. Specifically, responses elicited from students located in the UK, Australia and New Zealand form the basis of the study which reports on a number of design features in the LMS (e.g. delivery of lecture notes, announcements, on-line assessment and model answers) used to deliver learning materials regarded as necessary to enhance learning outcomes. Responses from 825 on-campus students provided international data to develop …

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Threading And Autodocumenting News Videos: A Promising Solution To Rapidly Browse News Topics, Xiao Wu, Chong-Wah Ngo, Qing Li Mar 2006

Threading And Autodocumenting News Videos: A Promising Solution To Rapidly Browse News Topics, Xiao Wu, Chong-Wah Ngo, Qing Li

Research Collection School Of Computing and Information Systems

This paper describes the techniques in threading and autodocumenting news stories according to topic themes. Initially, we perform story clustering by exploiting the duality between stories and textual-visual concepts through a co-clustering algorithm. The dependency among stories of a topic is tracked by exploring the textual-visual novelty and redundancy of stories. A novel topic structure that chains the dependencies of stories is then presented to facilitate the fast navigation of the news topic. By pruning the peripheral and redundant news stories in the topic structure, a main thread is extracted for autodocumentary

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Tacit Knowledge, Nonaka And Takeuchi Seci Model And Informal Knowledge Processes, Siu Loon Hoe Mar 2006

Tacit Knowledge, Nonaka And Takeuchi Seci Model And Informal Knowledge Processes, Siu Loon Hoe

Research Collection School Of Computing and Information Systems

The organizational behavior and knowledge management literature has devoted a lot attention on how structural knowledge processes enhance learning. There has been little emphasis on the informal knowledge processes and the construct remains undefined. The purpose of this paper is to highlight the importance of informal knowledge processes, propose a definition for these processes and link them to the socialization and internalization processes suggested by Nonaka and Takeuchi in the SECI model. The paper offers a fresh perspective on how informal knowledge processes in organizations help to enhance the organization’s learning capability. It will enable scholars and managers to have …

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Agility Measurement Index: A Metric For The Crossroads Of Software Development Methodologies, Subhajit Datta Mar 2006

Agility Measurement Index: A Metric For The Crossroads Of Software Development Methodologies, Subhajit Datta

Research Collection School Of Computing and Information Systems

Software engineering's journey to maturity has been marked by the advent of different development methodologies. While each paradigm has its context and cognoscenti, project teams are often faced with the choice of one approach over another in the grind of delivering software on time and within budget. In this paper, we briefly review the three major techniques of addressing enterprise software development, namely the Waterfall, Unified and Extreme styles. The metric Agility Measurement Index is then proposed, which helps organizations choose the methodology that best suites a particular project.

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Sex Similarities And Differences In Preferences For Short-Term Mates: What, Whether, And Why, Norman P. Li, Douglas T. Kenrick Mar 2006

Sex Similarities And Differences In Preferences For Short-Term Mates: What, Whether, And Why, Norman P. Li, Douglas T. Kenrick

Research Collection School of Social Sciences

Are there sex differences in criteria for sexual relationships? The answer depends on what question a researcher asks. Data suggest that, whereas the sexes differ in whether they will enter short-term sexual relationships, they are more similar in what they prioritize in partners for such relationships. However, additional data and context of other findings and theory suggest different underlying reasons. In Studies 1 and 2, men and women were given varying "mate budgets" to design short-term mates and were asked whether they would actually mate with constructed partners. Study 3 used a mate-screening paradigm. Whereas women have been found to …

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Wittgenstein, Moorean Absurdity And Its Disappearance From Speech, John N. Williams Mar 2006

Wittgenstein, Moorean Absurdity And Its Disappearance From Speech, John N. Williams

Research Collection School of Social Sciences

G. E. Moore famously observed that to say, I went to the pictures last Tuesday but I don't believe that I did would be absurd. Why should it be absurd of me to say something about myself that might be true of me? Moore suggested an answer to this, but as I will show, one that fails. Wittgenstein was greatly impressed by Moore's discovery of a class of absurd but possibly true assertions because he saw that it illuminates the logic of assertion. Wittgenstein suggests a promising relation of assertion to belief in terms of the idea that one expresses …

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Chinese Views On Modern Marco Polos: New Foreign Trade Amendments After Wto Accession, Heng Wang Mar 2006

Chinese Views On Modern Marco Polos: New Foreign Trade Amendments After Wto Accession, Heng Wang

Research Collection Yong Pung How School Of Law

Since China’s accession to the World Trade Organization (WTO) at the end of 2001, it has made substantial, even heroic, efforts to change its laws and regulations. WTO accession has brought not only amendments to formal written laws, but greater transparency in government administration, enhanced opportunities for Chinese entrepreneurs, and more equal treatment between foreign and domestic business organizations. One crucial step forward is the Duiwai Maoyi Fa 2004 [Foreign Trade Act 2004] (“FTA 2004”), which amended the Duiwai Maoyi Fa 1994 [Foreign Trade Act 1994] (“FTA 1994”). With just over one year’s experience operating under this new foreign trade …

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Robust Classification Of Eeg Signal For Brain-Computer Interface, Manoj Thulasidas, Cuntai Guan, Jiankang Wu Mar 2006

Robust Classification Of Eeg Signal For Brain-Computer Interface, Manoj Thulasidas, Cuntai Guan, Jiankang Wu

Research Collection School Of Computing and Information Systems

We report the implementation of a text input application (speller) based on the P300 event related potential. We obtain high accuracies by using an SVM classifier and a novel feature. These techniques enable us to maintain fast performance without sacrificing the accuracy, thus making the speller usable in an online mode. In order to further improve the usability, we perform various studies on the data with a view to minimizing the training time required. We present data collected from nine healthy subjects, along with the high accuracies (of the order of 95% or more) measured online. We show that the …

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Regulation And Freedom In Global Business Education, Stefano Harney, Cliff Oswick Mar 2006

Regulation And Freedom In Global Business Education, Stefano Harney, Cliff Oswick

Research Collection Lee Kong Chian School Of Business

Purpose: This paper seeks to confront the orthodoxy of global business education with some insights from postcolonial theory in order to develop a new critical pedagogy adequate for a global sociology of management and accounting. Design/methodology/approach: Reviewing the state of play in postcolonial theory and noting the new politicisation in that field, the paper asks what relevance this politicisation might have for an alternative to orthodox global business education. Findings: The paper finds that the texts available to postcolonial theory present a wealth beyond the regulation of colonial and neo‐colonial regimes and in contrast critical management studies do not have …

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Splash: Systematic Proteomics Laboratory Analysis And Storage Hub, Siaw Ling Lo, You Tao, Qingsong Lin, Shashikant B. Joshi, Maxey Chung, Choy Leong Hew Mar 2006

Splash: Systematic Proteomics Laboratory Analysis And Storage Hub, Siaw Ling Lo, You Tao, Qingsong Lin, Shashikant B. Joshi, Maxey Chung, Choy Leong Hew

Research Collection School Of Computing and Information Systems

In the field of proteomics, the increasing difficulty to unify the data format, due to the different platforms/instrumentation and laboratory documentation systems, greatly hinders experimental data verification, exchange, and comparison. Therefore, it is essential to establish standard formats for every necessary aspect of proteomics data. One of the recently published data models is the proteomics experiment data repository [Taylor, C. F., Paton, N. W., Garwood, K. L., Kirby, P. D. et al., Nat. Biotechnol. 2003, 21, 247-254]. Compliant with this format, we developed the systematic proteomics laboratory analysis and storage hub (SPLASH) database system as an informatics infrastructure to support …

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Crosscutting Score: An Indicator Metric For Aspect Orientation, Subhajit Datta Mar 2006

Crosscutting Score: An Indicator Metric For Aspect Orientation, Subhajit Datta

Research Collection School Of Computing and Information Systems

Aspect Oriented Programming (AOP) provides powerful techniques for modeling and implementing enterprise software systems. To leverage its full potential, AOP needs to be perceived in the context of existing methodologies such as Object Oriented Programming (OOP). This paper addresses an important question for AOP practitioners - how to decide whether a component is best modeled as a class or an aspect? Towards that end, we present an indicator metric, the Crosscutting Score and a method for its calculation and interpretation. We will illustrate our approach through a sample calculation.

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Impact Of War And Military Service On Income Inequality In Northern Vietnam, Bussarawan Teerawichitchainan Mar 2006

Impact Of War And Military Service On Income Inequality In Northern Vietnam, Bussarawan Teerawichitchainan

Research Collection School of Social Sciences

During the 1940s-1970s Vietnam experienced nearly continuous wars. Military service was almost a rite of passage for young men growing up during these decades. Evidence indicates that families during wartime viewed military service as a locus for upward mobility, as the socialist regime promised veterans various incentives, including educational benefits, employment preference, and Communist Party membership. While this series of wars over the span of three decades has left a profound imprint on the early life course trajectories of men in Vietnam, there is surprisingly little research detailing the long-term consequences of military service. Based on the Vietnam Longitudinal Survey, …

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Strategic Communication In Crisis Governance: Singapore’S Management Of The Sars Crisis, Jin Yan, Augustine Pang, Glen T. Cameron Mar 2006

Strategic Communication In Crisis Governance: Singapore’S Management Of The Sars Crisis, Jin Yan, Augustine Pang, Glen T. Cameron

Research Collection Lee Kong Chian School Of Business

The contingency theory of conflict management and current crisis management literature are integrated in this paper to examine how crisis has been communi-cated and managed by the Singapore government and what kinds of strategies arose during the various stages of the SARS crisis life-cycle. Findings show that the Singapore government played a predominant role in managing how its multiple publics perceived the crisis by extensive communication through the news media. The media, in turn, playing a supporting nation-building role, assisted the government's management and communication of the crisis. To effectively manage the perception and emotion of the various public, the …

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Toward A Publics-Driven, Emotion-Based Approach In Crisis Communication: Testing The Integrated Crisis Mapping (Icm) Model, Yan Jin, A. Pang, Glen T. Cameron Mar 2006

Toward A Publics-Driven, Emotion-Based Approach In Crisis Communication: Testing The Integrated Crisis Mapping (Icm) Model, Yan Jin, A. Pang, Glen T. Cameron

Research Collection Lee Kong Chian School Of Business

Extending current situation-based conceptualizations of crisis response, theauthors have developed a more universal and systemic approach to understandingthe role of emotions in crises. The authors’ Integrated Crisis Mapping (ICM)model is based on a public-based, emotion-driven perspective where differentcrises are mapped on two continua, the organization’s involvement with the crisisissue and primary public’s coping strategy. The initial test suggested theoreticalrigor in the model and found that publics involved in crises pertaining toreputational damage, technological breakdown, industrial matters, labor unrest,and regulation/legislation, are likely to feel anxious, angry, and sad. At the sametime, they are likely to engage in conative coping and take …

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Affinities In The Socio-Political Thought Of Rorty And Levinas, Eduard Jordaan Mar 2006

Affinities In The Socio-Political Thought Of Rorty And Levinas, Eduard Jordaan

Research Collection School of Social Sciences

This article considers the affinities in the socio-political thought of Emmanuel Levinas and Richard Rorty. The writings of both display considerable concern for the suffering of others. Both authors note the importance of a self-critical subject becoming more aware of its own injustice as very important for recognizing our responsibilities to others. Furthermore, both stress the importance of recognizing the other outside of the usual, objectifying categories, since it is the uniqueness of the other that reminds us of our responsibility for the other. Both writers view the liberal state as the best political forum in which to realize a …

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Expectations, Animal Spirits, And Evolutionary Dynamics, Angelo Antoci, Massimiliano Landi, Pier Luigi Sacco Mar 2006

Expectations, Animal Spirits, And Evolutionary Dynamics, Angelo Antoci, Massimiliano Landi, Pier Luigi Sacco

Research Collection School Of Economics

We consider a (deterministic) evolutionary model where players have dynamic expectations about the strategy distribution. We provide a global analysis of the co-evolution of play and expectations for a generic two-by-two game. Besides the the typical indeterminacy of the evolutionary dynamics, we find some other ones: for any initial strategy configuration the dynamics can converge to any asymptotically stable fixed point, for different initial values of the expectations. Moreover, starting from the same initial pair of strategy configuration and values of expectations, the dynamics may lead to different asymptotically stable fixed points for different parameters of the expectations.

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Employee Screening: Theory And Evidence, Fali Huang, Peter Cappelli Mar 2006

Employee Screening: Theory And Evidence, Fali Huang, Peter Cappelli

Research Collection School Of Economics

Arguably the fundamental problem faced by employers is how to elicit effort from employees. Most models suggest that employers meet this challenge by monitoring employees carefully to prevent shirking. But there is another option that relies on heterogeneity across employees, and that is to screen job candidates to find workers with a stronger work ethic who require less monitoring. This should be especially useful in work systems where monitoring by supervisors is more difficult, such as teamwork systems. We analyze the relationship between screening and monitoring in the context of a principal-agent model and test the theoretical results using a …

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Singapore's Transition To Innovation-Based Economic Growth: Infrastructure, Institutions And Government's Role, Winston T. H. Koh Mar 2006

Singapore's Transition To Innovation-Based Economic Growth: Infrastructure, Institutions And Government's Role, Winston T. H. Koh

Research Collection School Of Economics

Technological progress and innovation plays a central role in a country's economic progress. As an economy advances to the global technological frontier and narrows the technological gap, an innovation-based growth strategy that focuses on investments in R&D and technology creation offers the greatest potential for economic growth. In this paper, we discuss the requirements for a successful transition, in terms of changes to the technology infrastructure, economic institutions and the incentives' structure. This paper outlines the efforts made by Singapore to re-make itself as an innovation-based economy, and the challenges faced by the government in transforming the nation's infrastructure and …

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Profiting From Mean-Reverting Yield Curve Trading Strategies, Choong Tze Chua, Winston T. H. Koh, Krishna Ramaswamy Mar 2006

Profiting From Mean-Reverting Yield Curve Trading Strategies, Choong Tze Chua, Winston T. H. Koh, Krishna Ramaswamy

Research Collection School Of Economics

This article studies a set of yield curve trading strategies that are based on the view that the yield curve mean reverts to an unconditional curve. These mean-reverting trading strategies exploit deviations in the level, slope, and curvature of the yield curve from historical norms. Some mean-reverting strategies were found to have significant positive profits. Furthermore, the profitability of one of these strategies significantly outperforms, on a risk-adjusted basis, alternative strategies of an investment bond or equity index.

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Underpriced Default Spread Exacerbates Market Crashes, Winston T. H. Koh, Roberto S. S. Mariano, Andrey Pavlov, Sock Yong Phang, Augustine H. H. Tan, Susan M. Wachter Mar 2006

Underpriced Default Spread Exacerbates Market Crashes, Winston T. H. Koh, Roberto S. S. Mariano, Andrey Pavlov, Sock Yong Phang, Augustine H. H. Tan, Susan M. Wachter

Research Collection School Of Economics

In this paper, we develop a specific observable symptom of a banking system that underprices the default spread in non-recourse asset-backed lending. Using three different data sets for 18 countries and property types, we find that, following a negative demand shock, the “underpricing” economies experience far deeper asset market crashes than economies in which the put option is correctly priced. Furthermore, only one of the countries in our sample continues to exhibit the underpricing symptom following a market crash. This indicates that market crashes have a cleansing effect and eliminate underpricing at least for a period of time. This makes …

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Multivariate Stochastic Volatility: A Review, Manabu Asai, Michael Mcaleer, Jun Yu Mar 2006

Multivariate Stochastic Volatility: A Review, Manabu Asai, Michael Mcaleer, Jun Yu

Research Collection School Of Economics

The literature on multivariate stochastic volatility (MSV) models has developed significantly over the last four years. This paper reviews the substantial literature on specification, estimation, and evaluation of MSV models. A wide range of MSV models is presented according to various categories, namely, (i) asymmetric models, (ii) factor models, (iii) time-varying correlation models, and (iv) alternative MSV specifications, including models based on the matrix exponential transformation, the Cholesky decomposition, and the Wishart autoregressive process. Alternative methods of estimation, including quasi-maximum likelihood, simulated maximum likelihood, and Markov chain Monte Carlo methods, are discussed and compared. Various methods of diagnostic checking and …

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The Rise In House Prices In China: Bubbles Or Fundamentals?, Jianying Hu, Liangjun Su, Sainan Jin, Wanjun Jiang Mar 2006

The Rise In House Prices In China: Bubbles Or Fundamentals?, Jianying Hu, Liangjun Su, Sainan Jin, Wanjun Jiang

Research Collection School Of Economics

The dramatic rise of house prices in many cities of China has brought huge attention from both the governmental and academic circles. There is a huge debate on whether the increasing house prices are driven by market fundamentals or just by speculation. Like Levin and Wright (1997a, 1997b), we decompose house prices in China into fundamental and non−fundamental components. We also consider potential nonlinear feedback from the historical growth rate of house prices on the current house prices and propose a semiparametric approach to estimate the speculative components in the model. We demonstrate that the non−fundamental part contributes a relatively …

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Different Wrongs, Different Remedies? Reactions To Organizational Remedies After Procedural And Interactional Injustice, Jochen Reb, Barry M. Goldman, Laura J. Kray, Russell Cropanzano Mar 2006

Different Wrongs, Different Remedies? Reactions To Organizational Remedies After Procedural And Interactional Injustice, Jochen Reb, Barry M. Goldman, Laura J. Kray, Russell Cropanzano

Research Collection Lee Kong Chian School Of Business

To alleviate the negative effects of workplace unfairness and resulting conflict, organizations can take remedial action to atone for a perceived injustice. We argue that the effectiveness of organizational remedies may depend on the match between type of injustice perceived and type of remedy offered. Specifically, based on the multiple needs model of justice (Cropanzano, Byrne, Bobocel, & Rupp, 2001), we expect procedural injustice to be particularly associated with preference for instrumental remedies that address the need for control. On the other hand, interactional injustice should be particularly associated with preference for punitive remedies that address the need for meaning. …

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Milky Way And Andromeda: Privacy, Confidentiality And Freedom Of Expression, George S. S. Wei Mar 2006

Milky Way And Andromeda: Privacy, Confidentiality And Freedom Of Expression, George S. S. Wei

Research Collection Yong Pung How School Of Law

This article examines the extent to which the law of confidence protects private personal information. In the UK, much of the impetus for greater protection comes from the European Convention on the Protection of Human Rights and Fundamental Freedoms. How privacy and freedom of expression are to be balanced either within the law of confidence or through the development of a new tort of privacy is a question that has given rise to much discussion in the courts and elsewhere. Developments in this area are the focus of this article together with the issue as to whether similar developments might …

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Fortifying Password Authentication In Integrated Healthcare Delivery Systems, Yanjiang Yang, Robert H. Deng, Feng Bao Mar 2006

Fortifying Password Authentication In Integrated Healthcare Delivery Systems, Yanjiang Yang, Robert H. Deng, Feng Bao

Research Collection School Of Computing and Information Systems

Integrated Delivery Systems (IDSs) now become a primary means of care provision in healthcare domain. However, existing password systems (under either the single-server model or the multi-server model) do not provide adequate security when applied to IDSs. We are thus motivated to present a practical password authentication system built upon a novel two-server model. We generalize the two-server model to an architecture of a single control server supporting multiple service servers, tailored to the organizational structure of IDSs. The underlying user authentication and key exchange protocols we propose are password-only, neat, efficient, and robust against off-line dictionary attacks mounted by …

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Publicly Verifiable Ownership Protection For Relational Databases, Yingjiu Li, Robert H. Deng Mar 2006

Publicly Verifiable Ownership Protection For Relational Databases, Yingjiu Li, Robert H. Deng

Research Collection School Of Computing and Information Systems

Today, watermarking techniques have been extended from the multimedia context to relational databases so as to protect the ownership of data even after the data are published or distributed. However, all existing watermarking schemes for relational databases are secret key based, thus require a secret key to be presented in proof of ownership. This means that the ownership can only be proven once to the public (e.g., to the court). After that, the secret key is known to the public and the embedded watermark can be easily destroyed by malicious users. Moreover, most of the existing techniques introduce distortions to …

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Caps: Energy-Efficient Processing Of Continuous Aggregate Queries In Sensor Networks, Wen Hu, Archan Misra, Rajiv Shorey Mar 2006

Caps: Energy-Efficient Processing Of Continuous Aggregate Queries In Sensor Networks, Wen Hu, Archan Misra, Rajiv Shorey

Research Collection School Of Computing and Information Systems

In this paper, we design and evaluate an energy efficient data retrieval architecture for continuous aggregate queries in wireless sensor networks. We show how the modification of precision in one sensor affects the sample-reporting frequency of other sensors, and how the precisions of a group of sensors may be collectively modified to achieve the target quality of information (QoI) with higher energy-efficiency. The proposed collective adaptive precision setting (CAPS) architecture is then extended to exploit the observed temporal correlation among successive sensor samples for even greater energy efficiency. Detailed simulations with synthetic and real data traces demonstrate how the combination …

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Is It All A Question Of Openness?, Seow Hon Tan Mar 2006

Is It All A Question Of Openness?, Seow Hon Tan

Research Collection Yong Pung How School Of Law

No abstract provided.

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Large-Scale Investigation Of The Role Of Trait Activation Theory For Understanding Assessment Center Convergent And Discriminant Validity, Filip Lievens, Christopher S. Chasteen, Eric A. Day, Neil D. Christiansen Mar 2006

Large-Scale Investigation Of The Role Of Trait Activation Theory For Understanding Assessment Center Convergent And Discriminant Validity, Filip Lievens, Christopher S. Chasteen, Eric A. Day, Neil D. Christiansen

Research Collection Lee Kong Chian School Of Business

This study used trait activation theory as a theoretical framework to conduct a large-scale test of the interactionist explanation of the convergent and discriminant validity findings obtained in assessment centers. Trait activation theory specifies the conditions in which cross-situationally consistent and inconsistent candidate performances are likely to occur. Results obtained by aggregating correlations across 30 multitrait-multimethod matrices supported the propositions of trait activation theory, shedding a more positive light on the construct validity puzzle in assessment centers. Overall, convergence among assessment center ratings was better between exercises that provided an opportunity to observe behavior related to the same trait, and …

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