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Variations Of Diffie-Hellman Problem, Feng Bao, Robert H. Deng, Huafei Zhu Oct 2003

Variations Of Diffie-Hellman Problem, Feng Bao, Robert H. Deng, Huafei Zhu

Research Collection School Of Computing and Information Systems

This paper studies various computational and decisional Diffie-Hellman problems by providing reductions among them in the high granularity setting. We show that all three variations of computational Diffie-Hellman problem: square Diffie-Hellman problem, inverse Diffie-Hellman problem and divisible Diffie-Hellman problem, are equivalent with optimal reduction. Also, we are considering variations of the decisional Diffie-Hellman problem in single sample and polynomial samples settings, and we are able to show that all variations are equivalent except for the argument DDH ⇐ SDDH. We are not able to prove or disprove this statement, thus leave an interesting open problem. Keywords: Diffie-Hellman problem, Square Diffie-Hellman …

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Moorean Absurdity And Conscious Belief, John N. Williams Oct 2003

Moorean Absurdity And Conscious Belief, John N. Williams

Research Collection School of Social Sciences

G. E. Moore observed that to for me to assert, “I went to the pictures last Tuesday but I don’t believe that I did” would be “absurd” (1942: 543). Over half a century later, the explanation of the nature of this absurdity remains problematic. Such assertions are unlike semantically odd Liar-type assertions such as “What I’m now saying is not true” since my Moorean assertion might be true: you may consistently imagine a situation in which I went to the pictures last Tuesday but fail to believe that I did. Moreover, if you contradict my assertion then your words, “If …

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Corporate Social Responsibility Reputation Effects On Mba Job Choice: Controlling For Region Of Origin, David B. Montgomery, Catherine A. Ramus Oct 2003

Corporate Social Responsibility Reputation Effects On Mba Job Choice: Controlling For Region Of Origin, 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 in …

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The Enhancement Bias In Consumer Decisions To Adopt And Utilize Product Innovations, Shenghui Zhao, Robert J. Meyer, Jin K. Han Oct 2003

The Enhancement Bias In Consumer Decisions To Adopt And Utilize Product Innovations, Shenghui Zhao, Robert J. Meyer, Jin K. Han

Research Collection Lee Kong Chian School Of Business

The ability of consumers to anticipate the value they will draw from new product generations that expand the capabilities of incumbent goods is explored. Drawing on previous research in affective forecasting, the work explores a hypothesis that consumers will frequently overestimate the benefits they envision drawing from new added product features and underestimate the learning costs required to realize those benefits. This hypothesis is tested using a computer simulation in which subjects are trained to play a Pacman-like arcade game where icons are moved over a screen by different forms of tactile controls. Respondents are then given the option to …

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A Renewable-Resource Approach To Database Valuation, Xavier Dreze, Andre Bonfrer Oct 2003

A Renewable-Resource Approach To Database Valuation, Xavier Dreze, Andre Bonfrer

Research Collection Lee Kong Chian School Of Business

We demonstrate in this paper that firms should view customers in a database as a renewable resource when valuating them. Indeed, customer names flow in and out of the firm’s databases, and the goal of the firm is to optimize the overall customer acquisition/cultivation/attrition process. The renewable resource approach to the problem of maximizing the profits generated by a flow of customer names is more appropriate than the traditional Customer Lifetime Value (CLV) approach. We show that CLV underestimates the true value of names (by more than 400% in some cases) and leads to sub-optimal customer relationship management and acquisition …

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Adaptive Collusion Attack To A Block Oriented Watermarking Scheme, Yongdong Wu, Robert H. Deng Oct 2003

Adaptive Collusion Attack To A Block Oriented Watermarking Scheme, Yongdong Wu, Robert H. Deng

Research Collection School Of Computing and Information Systems

In this paper, we propose an adaptive collusion attack to a block oriented watermarking scheme [1]. In this attack, traitors conspire to selectively manipulate watermarked blocks to remove the watermark information. To this end, the traitors compare the watermarked blocks generated from the same original block. If two watermarked block are not equal, they average these two blocks to generate a pirated block. Then, replace the watermarked blocks with the pirated blocks so as to build a pirated image. The pirated image has no watermark but has much higher quality than watermarked images. We also give a theoretical analysis on …

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An Efficient Public-Key Framework, Jianying Zhou, Feng Bao, Robert H. Deng Oct 2003

An Efficient Public-Key Framework, Jianying Zhou, Feng Bao, Robert H. Deng

Research Collection School Of Computing and Information Systems

Public-key certificates play an important role in binding the public key with the identity of the owner of the corresponding private key. A certificate might be revoked before its scheduled expiry date by the issuing CA. Efficient and timely distribution of certificate revocation information is a big challenge facing the PKI providers. Existing certificate revocation schemes place a considerable processing, communication, and storage overheads on the CA as well as the relying parties. To improve the current situation, we propose a revocation-free public-key framework, in which the maximum lifetime of a certificate is divided into short periods and the certificate …

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Security Remarks On A Group Signature Scheme With Member Deletion, Guilin Wang, Feng Bao, Jianying Zhou, Robert H. Deng Oct 2003

Security Remarks On A Group Signature Scheme With Member Deletion, Guilin Wang, Feng Bao, Jianying Zhou, Robert H. Deng

Research Collection School Of Computing and Information Systems

A group signature scheme allows a group member of a given group to sign messages on behalf of the group in an anonymous and unlinkable fashion. In case of a dispute, however, a designated group manager can reveal the signer of a valid group signature. Based on the Camenisch-Michels group signature scheme, Kim, Lim and Lee proposed the first group signature scheme with a member deletion procedure at ICISC 2000. Their scheme is very efficient in both communication and computation aspects. Unfortunately, their scheme is insecure. In this paper, we first identify an effective way that allows any verifier to …

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Wittgenstein, Moorean Absurdity And Its Disappearance From Speech, John N. Williams Oct 2003

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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Part Ii - What Would You Do - With A Taniwha At The Table?, Ian Macduff Oct 2003

Part Ii - What Would You Do - With A Taniwha At The Table?, Ian Macduff

Research Collection Yong Pung How School Of Law

In the last issues of Negotiation Journal, the author explored the complicating factor of having a taniwha or spirit at the negotiating table in a New Zeland case. He challenged his readers to give him suggestions about how negotiators might grapple with often preplexing problems posed by the spiritual valus of their counterparts.

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Moorean Absurdity And Expressing Belief, John N. Williams Sep 2003

Moorean Absurdity And Expressing Belief, John N. Williams

Research Collection School of Social Sciences

No abstract provided.

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Trading Your Neighbor's Etfs: Competition Or Fragmentation?, Beatrice Boehmer, Ekkehart Boehmer Sep 2003

Trading Your Neighbor's Etfs: Competition Or Fragmentation?, Beatrice Boehmer, Ekkehart Boehmer

Research Collection Lee Kong Chian School Of Business

On July 31, 2001, for the first time in its history, the New York Stock Exchange (NYSE) began trading three unlisted securities. The DIA, SPY, and QQQ are the most actively traded Exchange Traded Funds (ETFs) and are listed on the American Stock Exchange. On April 15, 2002 another 27 ETFs followed. These two events provide a unique experiment for studying the impact of a new entrant on market quality. In contrast to recently revived concerns about the adverse impact of market fragmentation, we document that the NYSE entry leads to a dramatic improvement in liquidity that we attribute to …

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Reasoning About Competitive Reactions: Evidence From Executives, David B. Montgomery, Marian Chapman Moore, Joel E. Urbany Sep 2003

Reasoning About Competitive Reactions: Evidence From Executives, David B. Montgomery, Marian Chapman Moore, Joel E. Urbany

Research Collection Lee Kong Chian School Of Business

Much of the empirical research on competitive reactions describes how or why rivals react to a firm’s past actions, but stops short of examining whether managers attempt to predict such reactions, which we call strategic competitive reasoning. In three exploratory studies, we find evidence of managers’ thinking about competitors’ past and future behavior, but little incidence of strategic competitive reasoning. Competitive intelligence experts and other experienced managers assessment of the results suggests the relatively low incidence of strategic competitor reasoning is due to perceptions of low returns from anticipating competitor reactions more than to the high cost of doing so. …

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Acceptance Of Golden Rice In The Philippine Rice Bowl, Mark Chong Sep 2003

Acceptance Of Golden Rice In The Philippine Rice Bowl, Mark Chong

Research Collection Lee Kong Chian School Of Business

Few science issues in recent years have elicited such polarized public reactions as modern biotechnology and its agricultural applications. Although a new study conducted by the University of Illinois at Urbana-Champaign and the International Service for the Acquisition of Agri-biotech Applications (Ithaca, NY, USA) indicates that Southeast Asian stakeholders generally hold positive views about agricultural biotechnology.

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For A Few Euros More: Campaign Spending Effects In The Irish Local Elections Of 1999, Kenneth Benoit, Michael Marsh Sep 2003

For A Few Euros More: Campaign Spending Effects In The Irish Local Elections Of 1999, Kenneth Benoit, Michael Marsh

Research Collection School of Social Sciences

Although perceived by candidates and parties as important in affecting political outcomes, the link between spending and success in multi-candidate, multiparty election campaigns remains unproven. Not only are there relatively few studies of campaign spending effects in multi-party systems, there are none examining the effect under the Single Transferable Vote (STV) electoral system. Our study examines spending effects in the Irish local elections of 1999 using STV with district magnitudes between 3 and 7 seats, contested by a median of 10 candidates in each district. Using detailed data on 1,838 candidates from 180 local constituencies and 30 councils, we provide …

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An Issue Of Absolution: Section 391 Of The Companies Act, Pearlie Koh Sep 2003

An Issue Of Absolution: Section 391 Of The Companies Act, Pearlie Koh

Research Collection Yong Pung How School Of Law

There is an obvious tension in the imposition of directors’ duties. Whilst directors being the management, and therefore the eyes, ears and brain of the corporate person, must be given sufficient discretion to take on entrepreneurial (and hence risky) ventures with a view to profit maximisation, there is also the need to curb excesses, as the potential or opportunity for mismanagement, negligence and fraud is omnipresent. [T]his short article considers section 391 of the Companies Act (Cap 50), arguably the statutory nemesis of directors’ duties. Section 391 gives jurisdiction to the court hearing the case to relieve an officer from …

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Information Systems Requirements Determination And Analysis: A Mental Modeling Approach, Keng Siau, X. Tan Aug 2003

Information Systems Requirements Determination And Analysis: A Mental Modeling Approach, Keng Siau, X. Tan

Research Collection School Of Computing and Information Systems

Regardless of the system development methodology adopted, being able to understand users’ informationrequirements is vital to the success of an information systems project. The intrinsic communications obstaclesexist within an individual user, among users, and between users and systems analysts. Different requirementsdetermination and analysis (RDA) techniques have been widely used with different outcomes. Some limitations of these techniques can be identified. In this paper, we propose a mental modeling approach to support RDA. Popular in other disciplines, mental modeling techniques have some distinct advantages to overcome some intrinsic communication obstacles in RDA, and to complement other techniques.

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Antecedents Of Consumer Trust In B-To-C Electronic Commerce, Dan J. Kim, Donald L. Ferrin, H. Raghav Rao Aug 2003

Antecedents Of Consumer Trust In B-To-C Electronic Commerce, Dan J. Kim, Donald L. Ferrin, H. Raghav Rao

Research Collection Lee Kong Chian School Of Business

Despite the importance of trust in electronic commerce, there is insufficient theory and evidence concerning the determinants of consumer trust about an Internet vendor’s trustworthiness, and the influence of consumer trust on the consumer’s purchasing intention. The purpose of this study is to: i) develop a theoretical framework identifying the antecedents of a consumer’s trust and purchase intention, ii) test the proposed model using Structural Equation Modeling, analyzing Internet consumer behavior data collected via a Web survey, and iii) provide theoretical and managerial implications. The results of the study show that consumers’ disposition to trust, privacy protection, security protection, consumers’ …

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Broadcast Scheduling For Mobile Advertising, Bert De Reyck, Zeger Degraeve Aug 2003

Broadcast Scheduling For Mobile Advertising, Bert De Reyck, Zeger Degraeve

Research Collection Lee Kong Chian School Of Business

We describe a broadcast scheduling system developed for a precision marketing firm specialized in location-sensitive permission-based mobile advertising using SMS (Short Message Service) text messaging. Text messages containing advertisements were sent to registered customers when they were shopping in one of two shopping centers in the vicinity of London. The ads typically contained a limited-time promotional offer. The company's problem was deciding which ads to send out to which customers at what particular time, given a limited capacity of broadcast time slots, while maximizing customer response and revenues from retailers paying for each ad broadcast. We solved the problem using …

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Adrenocortical Adenoma And Carcinoma: Histopathological And Molecular Comparative Analysis, A. Stojadinovic, M. F. Brennan, A. Hoos, A. Omeroglu, Denis H. Y. Leung, M. Dudas, A. Nissan, C. Cordon-Cardo, R.A. Ghossein Aug 2003

Adrenocortical Adenoma And Carcinoma: Histopathological And Molecular Comparative Analysis, A. Stojadinovic, M. F. Brennan, A. Hoos, A. Omeroglu, Denis H. Y. Leung, M. Dudas, A. Nissan, C. Cordon-Cardo, R.A. Ghossein

Research Collection School Of Economics

We compared histomorphological features and molecular expression profiles of adrenocortical adenomas (ACAd) and carcinomas (ACCa). A critical histopathological review (mean, 11 slides per patient) was conducted of 37 ACAd and 67 ACCa. Paraffin-embedded tissue cores of ACAd (n = 33) and ACCa (n = 38) were arrayed in triplicate on tissue microarrays. Expression profiles of p53, mdm-2, p21, Bcl-2, cyclin D1, p27, and Ki-67 were investigated by immunohistochemistry and correlated with histopathology and patient outcome using standard statistical methodology. Median follow-up period was 5 years. Tumor necrosis, atypical mitoses, and >1 mitosis per 50 high-power fields were factors that were …

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The Effect Of Domain Knowledge On Icon Visualization, Keng Siau, Fiona Fui-Hoon Nah Aug 2003

The Effect Of Domain Knowledge On Icon Visualization, Keng Siau, Fiona Fui-Hoon Nah

Research Collection School Of Computing and Information Systems

Iconic interfaces are now the de facto interface for most computer systems. Despite the popularity of iconic interfaces and the widespread belief that iconic interfaces are easier to comprehend than non-iconic interfaces, we have not come across any published study that has examined the effect of domain knowledge on end users’ interpretation of icons. An understanding of the relationship between domain knowledge and its effect on interpretation will enable us to design better icons to not only facilitate end users’ interpretation but also reduce misinterpretations of icons. This paper reports on an experimental study that investigates the effect of domain …

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Omission Bias In Vaccination Decision: Where's The "Omission"? Where's The "Bias"?, Terry Connolly, Jochen Reb Jul 2003

Omission Bias In Vaccination Decision: Where's The "Omission"? Where's The "Bias"?, Terry Connolly, Jochen Reb

Research Collection Lee Kong Chian School Of Business

Several studies have reported that parents are often reluctant to vaccinate their own or other people's children, even when the balance of health risks and benefits clearly favors vaccination. This reluctance has been interpreted as a manifestation of omission bias, a general tendency to prefer inactive to active options even when inaction leads to worse outcomes or greater risks. The research raises significant public health concerns as well as worries about human decision biases in general. In this paper we argue that existing research on vaccination decisions has not convincingly demonstrated any general reluctance to vaccinate nor has it made …

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Once A Director, Always A Fiduciary?, Pearlie Koh Jul 2003

Once A Director, Always A Fiduciary?, Pearlie Koh

Research Collection Yong Pung How School Of Law

The corporate director is subject to duties of good faith and loyalty. As he stands in a fiduciary position vis-a-vis the company on whose board he sits, he is subject to strict obligations of self-denial. Indeed, ensuring adherence to an absolute rule in this regard is justified by the need to control, albeit in a necessarily imperfect and arguably ineffective manner, the exercise of discretion by the director who stands in an undoubted position of power with respect to the company. A director therefore is obliged to avoid a conflict of interests and is prohibited from profiting from his office. …

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What Has Luck Got To Do With Economic Development? An Interpretation Of Resurgent Asia's Growth Experience, Hing-Man Leung, Swee Liang Tan, Zhenlin Yang Jul 2003

What Has Luck Got To Do With Economic Development? An Interpretation Of Resurgent Asia's Growth Experience, Hing-Man Leung, Swee Liang Tan, Zhenlin Yang

Research Collection School Of Economics

This paper critically reexamines the belief, currently gathering strength in the literature, that economic development depends on good luck rather than on good policy, and that Prometheus is “unchained by chance”. While it is impossible to disprove the role of luck in growth, we argue that luck is endogenous, and good luck is a function of good policy. Luck favours those who strive. Again contrary to common belief, we show that resurgent Asian economies have endured more, not less, than their fair share of economic volatility. They learned their lessons by success and failures, and luck is endogenous through learning-by-investing.

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Transformation Approaches For The Construction Of Weibull Prediction Interval, Zhenlin Yang, Stanley P. See, Min Xie Jul 2003

Transformation Approaches For The Construction Of Weibull Prediction Interval, Zhenlin Yang, Stanley P. See, Min Xie

Research Collection School Of Economics

Two methods of transforming the Weibull data to near normality, namely the Box-Cox method and Kullback-Leibler (KL) information method, are discussed and contrasted. A simple prediction interval (PI) based on the better KL information method is proposed. The asymptotic property of this interval is established. Its small sample behavior is investigated using Monte Carlo simulation. Simulation results show that this simple interval is close to the existing complicated PI where the percentage points of the reference distribution have to be either simulated or approximated.

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What Would You Do - With A Taniwha At The Table?, Ian Macduff Jul 2003

What Would You Do - With A Taniwha At The Table?, Ian Macduff

Research Collection Yong Pung How School Of Law

In New Zealand, a complicating factor in some disputes may involve the presence (whether one believes it or not) of a taniwha, or spirit, as a major part of the negotiations. What advice would you have for mediators who face such significant cross-cultural, identity-based issues? The author hopes readers of this journal will be able to provide some insighful advice.

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Ladar-Based Detection And Tracking Of Moving Objects From A Ground Vehicle At High Speeds, Chieh-Chih Wang, Charles Thorpe, Arne Suppe Jun 2003

Ladar-Based Detection And Tracking Of Moving Objects From A Ground Vehicle At High Speeds, Chieh-Chih Wang, Charles Thorpe, Arne Suppe

Research Collection School Of Computing and Information Systems

Detection and tracking of moving objects (DATMO) in crowded urban areas from a ground vehicle at high speeds is difficult because of a wide variety of targets and uncertain pose estimation from odometry and GPS/DGPS. In this paper we present a solution of the simultaneous localization and mapping (SLAM) with DATMO problem to accomplish this task using ladar sensors and odometry. With a precise pose estimate and a surrounding map from SLAM, moving objects are detected without a priori knowledge of the targets. The interacting multiple model (IMM) estimation algorithm is used for modeling the motion of a moving object …

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Responsibility For Past Injustice: How To Shift The Burden, Chandran Kukathas Jun 2003

Responsibility For Past Injustice: How To Shift The Burden, Chandran Kukathas

Research Collection School of Social Sciences

This article considers the question of the responsibility of present generations for injustices committed by previous ones. It asks whether the descendants of victims of past injustice have claims against the descendants of the perpetrators of injustice. Two modes of argument are examined: the individual responsibility approach, according to which descendants cannot have claims against other descendants, and the collective responsibility approach, according to which descendants do have strong claims. Both approaches are criticized, but for different failings. An alternative view, building on the individualist approach, is defended. This view argues that some people may have to bear responsibility for …

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Privacy And Attitudes Towards Internet-Based Selection Systems: A Cross-Cultural Comparison, Michael M. Harris, Greet Van Hoye, Filip Lievens Jun 2003

Privacy And Attitudes Towards Internet-Based Selection Systems: A Cross-Cultural Comparison, Michael M. Harris, Greet Van Hoye, Filip Lievens

Research Collection Lee Kong Chian School Of Business

This paper examines perceptions of privacy and how they relate to reluctance to submit employment-related information over the Internet. In addition, possible cross-cultural differences between the US and Belgium regarding these constructs and the role of Internet knowledge are investigated. Based on theories of privacy and cross-cultural differences, a survey methodology was applied to test several hypotheses. Results suggest that privacy considerations may affect reluctance to use an Internet-based selection system. Moreover, as expected, some differences were observed between US and Belgian respondents. Respondents possessing a higher self-rated knowledge of the Internet were less concerned that employment-related data submitted over …

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Predicting Cross-Cultural Training Performance: The Validity Of Personality, Cognitive Ability, And Dimensions Measured By An Assessment Center And A Behavior Description Interview, Filip Lievens, Michael M. Harris, Etienne Van Keer, Claire Bisqueret Jun 2003

Predicting Cross-Cultural Training Performance: The Validity Of Personality, Cognitive Ability, And Dimensions Measured By An Assessment Center And A Behavior Description Interview, Filip Lievens, Michael M. Harris, Etienne Van Keer, Claire Bisqueret

Research Collection Lee Kong Chian School Of Business

This study examined the validity of a broad set of predictors for selecting European managers for a cross-cultural training program in Japan. The selection procedure assessed cognitive ability, personality, and dimensions measured by assessment center exercises and a behavior description interview. Results show that the factor Openness was significantly related to cross-cultural training performance, whereas. cognitive ability was significantly correlated with language acquisition. The dimensions of adaptability, teamwork, and communication as measured by a group discussion exercise provided incremental variance in both criteria, beyond cognitive ability and personality. In general, these results are consistent with the literature on domestic selection, …

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