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Articles 6841 - 6870 of 8681
Full-Text Articles in Entire DC Network
Privacy-Preserving Similarity-Based Text Retrieval, Hwee Hwa Pang, Jialie Shen, Ramayya Krishnan
Privacy-Preserving Similarity-Based Text Retrieval, Hwee Hwa Pang, Jialie Shen, Ramayya Krishnan
Research Collection School Of Computing and Information Systems
Users of online services are increasingly wary that their activities could disclose confidential information on their business or personal activities. It would be desirable for an online document service to perform text retrieval for users, while protecting the privacy of their activities. In this article, we introduce a privacy-preserving, similarity-based text retrieval scheme that (a) prevents the server from accurately reconstructing the term composition of queries and documents, and (b) anonymizes the search results from unauthorized observers. At the same time, our scheme preserves the relevance-ranking of the search server, and enables accounting of the number of documents that each …
Efficient Valid Scope For Location-Dependent Spatial Queries In Mobile Environments, Ken C. K. Lee, Wang-Chien Lee, Hong Va Leong, Brandon Unger, Baihua Zheng
Efficient Valid Scope For Location-Dependent Spatial Queries In Mobile Environments, Ken C. K. Lee, Wang-Chien Lee, Hong Va Leong, Brandon Unger, Baihua Zheng
Research Collection School Of Computing and Information Systems
In mobile environments, mobile clients can access information with respect to their locations by submitting Location-Dependent Spatial Queries (LDSQs) to Location-Based Service (LBS) servers. Owing to scarce wireless channel bandwidth and limited client battery life, frequent LDSQ submission from clients must be avoided. Observing that LDSQs issued from a client located at nearby positions would likely return the same query results, we explore the idea of valid scope, which represents a spatial area in which a set of LDSQs will retrieve exactly the same set of query results. With a valid scope derived and an LDSQ result cached, a client …
Teaching Trust Law In The Twenty First Century, Hang Wu Tang
Teaching Trust Law In The Twenty First Century, Hang Wu Tang
Research Collection Yong Pung How School Of Law
I met Michael Bryan in 2004 at the Obligations II conference at the Melbourne Law School. It was my first time presenting a paper at an international conference and I was quite nervous. Michael, who was chairing my session, was extremely warm and supportive and put me quickly at ease. After the session, he generously gave me many insightful suggestions on how to improve my paper. Over the years, I have heard that this is just typical of Michael as a person; colleagues from Melbourne have often been effusive in their praise of Michael. Michael has certainly shown us the …
The European Union’S Role In The Prevention Of Vessel-Source Pollution And Its Internal Influence, Nengye Liu, Fran Maes
The European Union’S Role In The Prevention Of Vessel-Source Pollution And Its Internal Influence, Nengye Liu, Fran Maes
Research Collection Yong Pung How School Of Law
The EU has the institutions and the comprehensive legal regime to regulate the prevention of vessel-source pollution within the Member States and these are reviewed here together with the international conventions. The EU has been much more proactive since the Erika and Prestige disasters with the adoption of a series of new regulations on the prevention of vessel-source pollution.This legislation also demonstrates an expansion of the competencies of EU institutions towards Member States, and the EU approach, although largely regarded as a success, has also been criticised as tending towards unilateralism.
Disambiguating The Role Of Ambiguity In Perceptual Assimilation And Contrast Effects, Michelle P. Lee, Kwanho Suk
Disambiguating The Role Of Ambiguity In Perceptual Assimilation And Contrast Effects, Michelle P. Lee, Kwanho Suk
Research Collection Lee Kong Chian School Of Business
We examine how perceptions of a product are affected by the presence of extreme exemplars and find that ambiguity of the product is an important moderator. When the target is a novel one, perceptions assimilate to the context, whereas when it is highly familiar, perceptions are immune to the influence of context. This is as predicted by the interpretation-comparison model. Contrary to this model, however, we find that effects on perceptions are not always assimilative in nature. When product ambiguity falls between the extremes of novel and highly familiar, a contrast effect in perception can occur. This is consistent with …
Investing Into The Abyss: The Continued Misclassification Of Multi-Sector Managed Funds, N. Allen, Kok Fai Phoon, J. Watson, J. Wickramanayake
Investing Into The Abyss: The Continued Misclassification Of Multi-Sector Managed Funds, N. Allen, Kok Fai Phoon, J. Watson, J. Wickramanayake
Research Collection Lee Kong Chian School Of Business
The rapid expansion in assets managed by the Australian managed fund industry has resulted in it becoming a major sector of the financial system, second only to that of the banking industry. With more than A$550 billion invested in the industry investors should be concerned about the lack of reliable information available in regard to equity style management. In particular investors should be concerned about the probable mis-match between stated objectives and the actual objectives pursued by fund managers. In this study, we apply return-based style analysis (Sharpe 1988, 1992) to investigate the style and asset allocation strategies of 50 …
Research Guides At Smu Li Ka Shing Library: Built With Libguides, Pin Pin Yeo
Research Guides At Smu Li Ka Shing Library: Built With Libguides, Pin Pin Yeo
Research Collection Library
The Li Ka Shing Library at the Singapore Management University (SMU) used a new platform, LibGuides to create their research guides. The research guides are traditionally subject pathfinders, but at the LKS Library, the guides are also used as a teaching tool and to support a course. The implementation process for LibGuides and the usage of the guides was explored. Statistics on usage of the guides on the LibGuides platform were provided. The course specific guides at the Library contribute 59% of the usage from the top 20 guides.
Don't Do Good, Fredrik Härén
Don't Do Good, Fredrik Härén
Social Space
The idea of being unselfish may not be as catchy a sound bite as the idea of being good, but I think it is a better goal to strive for. One thing is certain: at a time when we have become efficient at using the earth’s resources in a completely unsustainable manner, the value of putting aside one’s personal wants and desires is far greater.
Discovering The Asian Form Of Corporate Social Responsibility, Bindu Sharma
Discovering The Asian Form Of Corporate Social Responsibility, Bindu Sharma
Social Space
This article is part of an on-going research project that will look at the how corporate social responsibility (CSR) is being re-contextualised and re-defined in ten countries across Asia and how these perspectives contrast with the discourse of CSR in global (primarily Western) multinational corporations.
The Stability Of Time Versus Money Valuations, Leonard Lee, Michelle P. Lee, Gal Zauberman
The Stability Of Time Versus Money Valuations, Leonard Lee, Michelle P. Lee, Gal Zauberman
Research Collection Lee Kong Chian School Of Business
In this work, we propose that the stability of consumer preferences in decision making differs depending on whether the resource in question is time or money. Two competing hypotheses are tested: whereas prior research has demonstrated greater ambiguity in the value of time (vs. money) thus pointing to less consistency in time valuation, a separate stream of research suggests that money (vs. time) lacks emotional tags and is more difficult to process, pointing to less consistency in money valuation. Our experimental results demonstrate that preferences based on money (vs. time) valuations are less transitive and consistent, supporting the emotion-based account.
Examining The Relationship Between Trust And Culture In The Consultant-Client Relationship, Stephanos Avakian, Timothy Clark, Joanne Roberts
Examining The Relationship Between Trust And Culture In The Consultant-Client Relationship, Stephanos Avakian, Timothy Clark, Joanne Roberts
Research Collection Lee Kong Chian School Of Business
This chapter examines the dimensions of inter-organizational and interpersonal trust as they are manifested in the consultant–client interaction, viewed within the ‘cultural spheres’ framework (Schneider and Barsoux, 2003). The chapter argues that the alignment or misalignment of culture(s) helps foster or hinder the presence of trust in the consultant–client relationship. We support our argument by demonstrating how culture becomes an important informative resource from which consultants and clients manage their expectations and risk taking. In inter-organizational contexts, trust is developed through artifacts and formal procedures that are shared by both parties. In interpersonal contexts, trust is developed through the mutual …
Is Regime Switching In Stock Returns Important In Asset Allocations?, Jun Tu
Is Regime Switching In Stock Returns Important In Asset Allocations?, Jun Tu
Research Collection Lee Kong Chian School Of Business
The stock market displays regime switching between upturns and downturns. This paper provides a Bayesian framework for making portfolio decisions that takes this regime switching into account, together with asset pricing model uncertainty and parameter uncertainty. The findings reveal that the economic value of accounting for regimes is substantially independent of whether or not model and parameter uncertainties are incorporated: the certainty-equivalent losses associated with ignoring regime switching are generally above 2% per year, and can be as high as 10%. These results suggest that the more realistic regime switching model is fundamentally different from the commonly used single-state model, …
Forecasting Realized Volatility Using A Nonnegative Semiparametric Time Series Model, A. Eriksson, D. Preve, Jun Yu
Forecasting Realized Volatility Using A Nonnegative Semiparametric Time Series Model, A. Eriksson, D. Preve, Jun Yu
Research Collection School Of Economics
This paper introduces a parsimonious and yet flexible nonnegative semiparametric model to forecast financial volatility. The new model extends the linear nonnegative autoregressive model of Barndorff-Nielsen & Shephard (2001) and Nielsen & Shephard (2003) by way of a power transformation. It is semiparametric in the sense that the distributional form of its error component is left unspecified. The statistical properties of the model are discussed and a novel estimation method is proposed. Asymptotic properties are established for the new estimation method. Simulation studies validate the new estimation method. The out-of-sample performance of the proposed model is evaluated against a number …
Firm And Industry Characteristics Of Exchange Rate Exposure And Optimal Hedging Strategy: Evidence On China, Fen Yan
Dissertations and Theses Collection (Open Access)
Understanding the effect of foreign exchange rate movements on the value of firm is a critical element for the purpose of risk management. In this thesis, firm and industry specific exposures to exchange rate movements in the Chinese market before and after the exchange rate regime reform in 2005 are examined. We observe that at the one-week return horizon, among all the firms listed in the China Exchange Market before the year 2001, less than 10% of the firms exhibit significant "residual exposure" to bilateral exchange rate movements against China’s major trading partners before the reform. In contrast, the proportion …
Discounts And Termination Of Close-End Funds, Chen Chen
Discounts And Termination Of Close-End Funds, Chen Chen
Dissertations and Theses Collection (Open Access)
Based on an extensive sample of U.S. closed end funds undergoing termination, this study offers a comprehensive analysis of closed end fund exiting behaviors. There are four ways for a fund to exit: merger into other closed-end fund, liquidation, conversion to open-end mutual fund and merger into open-end mutual fund. Closed-end funds that exit must choose the most efficient and optimal mechanisms corresponding to funds‟ characteristics and organizational forms. In this study, I find that closed-end funds exit optimally. First, funds with persistently larger discount and smaller size are more likely to exit and consistent with rational expectation, market incorporates …
Universal Authentication Protocols For Anonymous Wireless Communications, Guomin Yang, Qiong Huang, Duncan S. Wong, Xiaotie Deng
Universal Authentication Protocols For Anonymous Wireless Communications, Guomin Yang, Qiong Huang, Duncan S. Wong, Xiaotie Deng
Research Collection School Of Computing and Information Systems
A secure roaming protocol allows a roaming user U to visit a foreign server V and establish a session key in an authenticated way such that U authenticates V and at the same time convinces V that it is a legitimate subscriber of some server H, called the home server of U. The conventional approach requires the involvement of all the three parties. In this paper, we propose a new approach which requires only two parties, U and V, to get involved. We propose two protocols: one provides better efficiency and supports user anonymity to an extent comparable to that …
Communication And Cooperation In Social Dilemmas: A Meta-Analytic Review, Daniel Balliet
Communication And Cooperation In Social Dilemmas: A Meta-Analytic Review, Daniel Balliet
Research Collection School of Social Sciences
Among the most researched solutions to social dilemmas is communication. Since the late 1950s, it has been well known that communication enhances cooperation in social dilemmas. This article reports a meta-analysis of this literature (forty-five effect sizes) and finds a large positive effect of communication on cooperation in social dilemmas (d = 1.01). This effect is moderated by the type of communication, with a stronger effect of face-to-face discussion ( d = 1.21) compared to written messages (d = 0.46). The communication-cooperation relationship is also stronger in larger, compared to smaller, group social dilemmas. Whether communication occurred before or during …
Mobilizing For Human Rights: International Law In Domestic Politics [Book Review], Jiyoung Song
Mobilizing For Human Rights: International Law In Domestic Politics [Book Review], Jiyoung Song
Research Collection School of Social Sciences
Review of Mobilizing for human rights: international law in domestic politics by Beth A Simmons, Cambridge, United Kingdom, Cambridge University Press, 2009, ISBN 9780521885102 (hbk), ISBN 978-0-521-71232-3 (pbk), 451 pp. And Clifford Bob (ed.), The international struggle for new human rights, Philadelphia, University of Pennsylvania Press, 2009, ISBN 9780812241310, 195 pp.
Mining Antagonistic Communities From Social Networks, Kuan Zhang
Mining Antagonistic Communities From Social Networks, Kuan Zhang
Dissertations and Theses Collection (Open Access)
In this thesis, we examine the problem of mining antagonistic communities from social networks. In social networks, people with opposite opinions normally behave differently and form sub-communities each of which containing people sharing some common behaviors. In one scenario, people with opposite opinions show differences in their views on a set of items. Another scenario is people explicitly expressing whom they agree with, like or trust as well as whom they disagree with, dislike or distrust. We defined the indirect and direct antagonistic groups based on the two scenarios. We have developed algorithms to mine the two types of antagonistic …
Why "Democracy" And "Drifter" Firms Can Have Abnormal Returns: The Joint Importance Of Corporate Governance And Abnormal Accruals In Separating Winners From Losers, Koon Boon Kee
Dissertations and Theses Collection (Open Access)
Do managers exercise accounting discretion in an opportunistic or efficient manner? Good governance structures, which mitigate agency costs, are necessary to ensure that the accounting information supplied by management is not opportunistically manipulated. The output of quality accounting information, in turn, serves as an input to better governance structures. Thus, governance and earnings quality (EQ) are inexorably linked through a complementarity relationship. This suggests two previously unexamined relationships. Firstly, the governance effects on performance in the influential paper by Gompers, Ishii and Metrick (2003) is overrated without good EQ, measured by the magnitude of abnormal accruals (AA), as an input. …
Why Does Corporate Governance Matter? Evidence From Seasoned Bond Offerings, Fang Wang
Why Does Corporate Governance Matter? Evidence From Seasoned Bond Offerings, Fang Wang
Dissertations and Theses Collection (Open Access)
To examine the importance of corporate governance, I look at how management and investors behave in the event of seasoned bond offerings, controlling for the corporate governance structure of issuing firms. I find that companies with the weakest governance structure aggressively manipulate their earnings upwards during the two years prior to the debt issuances. And when the bond offerings are announced to the market, these same firms experienced positive abnormal returns over a three day event period, indicating that investors of poorly governed firms value a debt financing for the alleged decrease in agency cost.
News Which Moves The Market: Assessing The Impact Of Published Financial News On The Stock Market, Yu Chiang Soon
News Which Moves The Market: Assessing The Impact Of Published Financial News On The Stock Market, Yu Chiang Soon
Dissertations and Theses Collection (Open Access)
Recent years have seen a large increase in the volume of financial news available to investors daily. What has traditionally been restricted to print media has now evolved to include the internet and satellite television as important media sources for financial news. With this overwhelming flow of information available to investors, the impact of financial news on market prices is at best uncertain. In this paper, a computational text-scoring methodology will be employed to uncover behavioral responses by investors to negative news. The empirical methodology employed in this paper will consist of three parts. Firstly, through the General Inquirer (GI) …
Dynamic Quay Crane Allocation, Yan Zhang
Dynamic Quay Crane Allocation, Yan Zhang
Dissertations and Theses Collection (Open Access)
We introduce simple rules for quay cranes to handle containers along a berth where vessels arrive continuously in time. We first analyze a model where workload is continuous. Our analysis shows that if the system is configured properly, it will always converge to a state with the maximum possible throughput regardless of external disruptions or changes in workload. Numerical simulations based on a discrete workload model suggest that, by following the same rules, the system can still converge to state with throughput that is very close to its upper bound.
Risk Response Strategies In The Supply Chain: Examining Attributes Of Stakeholders And Risk Attitude, Shu Jian Lim
Risk Response Strategies In The Supply Chain: Examining Attributes Of Stakeholders And Risk Attitude, Shu Jian Lim
Dissertations and Theses Collection (Open Access)
Supply chain management is about managing flows of material, information and funds in a complex network of entities of suppliers, manufacturers, distributors and customers. Companies are now connected in this network as an extended enterprise and any company may be involved in more than one such extended enterprises. But, such a network of relationships is very much vulnerable to disruptions of all sorts ranging from internal to inter-firm and to external turbulences. Companies now need to be prepared for risks associated with their participation in the supply chain network. Not many works in the literature have used theories to study …
Ownership Structure, Financial Structure And R&D Investment: Evidence From Korean Firms, Yanghua Chen
Ownership Structure, Financial Structure And R&D Investment: Evidence From Korean Firms, Yanghua Chen
Dissertations and Theses Collection (Open Access)
Understanding factors that can enhance a firm‟s innovativeness is of critical concern in management research. Prior studies in strategy and financial economics have advanced our understanding of how resource allocation into innovation is shaped in a firm, mainly from the perspectives of ownership and financial structures. However, the extant literature is incomplete, because it treats ownership and financial structures as separate determinants, even though theoretical arguments and empirical evidences suggest that they are interdependent. This study investigates the determinants of firm‟s R&D investments by bridging ownership and financial structures. Ownerships held by inside and external owners are considered for ownership …
Organizational Slack, International Expansion And Firm Profitability, Anran Liu
Organizational Slack, International Expansion And Firm Profitability, Anran Liu
Dissertations and Theses Collection (Open Access)
International expansion is a viable growth strategy for firms operating in an increasingly competitive business environment. Understanding the relationship between international expansion and firm performance has been a significant concern for theory development in the strategy and international business literature. The extant literature, however, has paid insufficient attention to the tradeoff between firm growth and profitability that may imply the existence of an optimal rate of growth. Drawing from the Penrosian perspective that emphasizes the role of resources in firm growth, this study investigates whether and how firm slack resources affect the tradeoff between international expansion and profitability. Specifically, this …
Bayesian Analysis Of Country Risk Premia In Developing Small Open Economies, Seigmund Vincent Roque Conti
Bayesian Analysis Of Country Risk Premia In Developing Small Open Economies, Seigmund Vincent Roque Conti
Dissertations and Theses Collection (Open Access)
This thesis studies a model presented by Neumeyer & Perri (2005), which aims to explain the strong countercyclicality of interest rates and net exports in emerging market economies. The model accomplishes this by decomposing interest rates into an international rate and a country risk component, and by making labor demand sensitive to movements in these rates via a working capital constraint imposed on the representative firm. Moreover, it proposes two approaches to determining the stochastic processes for these interest rates: the independent country risk case and the induced country risk case. The induced country risk model calibrated to Argentine data …
Applying Soft Cluster Analysis Techniques To Customer Interaction Information, Randall E. Duran, Li Zhang, Tom Hayhurst
Applying Soft Cluster Analysis Techniques To Customer Interaction Information, Randall E. Duran, Li Zhang, Tom Hayhurst
Research Collection School Of Computing and Information Systems
The number of channels available for companies and customers to communicate with one another has increased dramatically over the past several decades. Although some market segmentation efforts utilize high-level customer interaction statistics, in-depth information regarding customers’ use of different communication channels is often ignored. Detailed customer interaction information can help companies improve the way that they market to customers by taking into consideration customers’ behaviour patterns and preferences. However, a key challenge of interpreting customer contact information is that many channels have only been in existence for a relatively short period of time, and thus, there is limited understanding and …
When Discrete Meets Differential: Assessing The Stability Of Structure From Small Motion, Wen-Yan Lin, Geok-Choo Tan, Loong-Fah Cheong
When Discrete Meets Differential: Assessing The Stability Of Structure From Small Motion, Wen-Yan Lin, Geok-Choo Tan, Loong-Fah Cheong
Research Collection School Of Computing and Information Systems
We provide a theoretical proof showing that under a proportional noise model, the discrete eight point algorithm behaves similarly to the differential eight point algorithm when the motion is small. This implies that the discrete algorithm can handle arbitrarily small motion for a general scene, as long as the noise decreases proportionally with the amount of image motion and the proportionality constant is small enough. This stability result extends to all normalized variants of the eight point algorithm. Using simulations, we show that given arbitrarily small motions and proportional noise regime, the normalized eight point algorithms outperform their differential counterparts …
Keep It Simple With Time: A Reexamination Of Probabilistic Topic Detection Models, Qi He, Kuiyu Chang, Ee Peng Lim, Arindam Banerjee
Keep It Simple With Time: A Reexamination Of Probabilistic Topic Detection Models, Qi He, Kuiyu Chang, Ee Peng Lim, Arindam Banerjee
Research Collection School Of Computing and Information Systems
Topic detection (TD) is a fundamental research issue in the Topic Detection and Tracking (TDT) community with practical implications; TD helps analysts to separate the wheat from the chaff among the thousands of incoming news streams. In this paper, we propose a simple and effective topic detection model called the temporal Discriminative Probabilistic Model (DPM), which is shown to be theoretically equivalent to the classic vector space model with feature selection and temporally discriminative weights. We compare DPM to its various probabilistic cousins, ranging from mixture models like von-Mises Fisher (vMF) to mixed membership models like Latent Dirichlet Allocation (LDA). …