Digital Commons Network^™

Mining Top-K Large Structural Patterns In A Massive Network, Feida Zhu, Qiang Qu, David Lo, Xifeng Yan, Jiawei Han, Philip S. Yu

Research Collection School Of Computing and Information Systems

With ever-growing popularity of social networks, web and bio-networks, mining large frequent patterns from a single huge network has become increasingly important. Yet the existing pattern mining methods cannot offer the efficiency desirable for large pattern discovery. We propose Spider- Mine, a novel algorithm to efficiently mine top-K largest frequent patterns from a single massive network with any user-specified probability of 1 − ϵ. Deviating from the existing edge-by-edge (i.e., incremental) pattern-growth framework, SpiderMine achieves its efficiency by unleashing the power of small patterns of a bounded diameter, which we call “spiders”. With the spider structure, our approach adopts a …

Structural Complexity And Programmer Team Strategy: An Experimental Test, Narayan Ramasubbu, Chris F. Kemerer, Jeff Min Teck Hong

Research Collection School Of Computing and Information Systems

This study develops and empirically tests the idea that the impact of structural complexity on perfective maintenance of object-oriented software is significantly determined by the team strategy of programmers (independent or collaborative). We analyzed two key dimensions of software structure, coupling and cohesion, with respect to the maintenance effort and the perceived ease-of-maintenance by pairs of programmers. Hypotheses based on the distributed cognition and task interdependence theoretical frameworks were tested using data collected from a controlled lab experiment employing professional programmers. The results show a significant interaction effect between coupling, cohesion, and programmer team strategy on both maintenance effort and …

The International Energy Agency In Global Energy Governance, Ann Florini

Research Collection School of Social Sciences

The International Energy Agency (IEA) is the organization that, despite its constrained membership, is as close as the world currently comes to a global focal point on the key energy governance arenas. Although when the IEA was established in the 1970s it had the specific and limited purpose of enabling the world's leading oil consumers to undertake collective action in response to oil supply shocks, it now finds itself at the center of many of the key developments in global energy governance. Its evolution and current challenges reflect the key themes of this special issue: the competition between state and …

Oral History Interview With Ronald Frank: Conceptualising Smu, Ronald Frank

Oral History Collection

The interview covered: first involvement with SMU, President of SMU, Bukit Timah campus, roles and responsibilities, faculty recruitment, advertising campaigns, student feedback, autonomous universities, strategy, law school, higher education landscape, impact.

Biography:

President, SMU, 2001–2004

Board of Trustees, SMU, 2000–2001

Professor Ronald E Frank, or Ron as he affectionately known, joined SMU’s board of trustees in 2000 and assumed his role as SMU’s second president in September 2001. His presidency was a time of rapid growth for the young university. SMU had just admitted its second cohort of undergraduate students in August 2001. During his time as president two schools …

To Succeed In Life And Business, Adapt And Fail Productively, Singapore Management University

Perspectives@SMU

Most people don't make very much of their bread toasters. These small but hardy metal boxes often come at low prices (from $7) and are not terribly difficult to operate. All in all, this is not the best example of a sophisticated, complicated or inventive home appliance.

To Succeed In Life And Business, Adapt And Fail Productively, Knowledge@Smu

Knowledge@SMU

There is no success without risk-taking, and most people will accept that risk-taking requires a tolerance for failure. Yet, how realistic is it to expect success in a world so bent on punishing failure? Why should people expect high returns in politics, economics and society when they continue to reward risk-averse politicians and leaders? Tim Harford, author of popular non-fiction books like Adapt and The Undercover Economist, explored this dichotomy at an SMU talk.

Acquisitions Driven By Stock Overvaluation: Are They Good Deals?, Fangjian Fu, Leming Lin, Micah Officer

Research Collection Lee Kong Chian School Of Business

Overvaluation may motivate a firm to use its stock to acquire a target whose stock is not as overpriced (Shleifer and Vishny (2003)). Though hypothetically desirable, these acquisitions in practice create little, if any, value for acquirer shareholders. Two factors often impede value creation: payment of a large premium to the target and lack of economic synergies in the acquisition. We find that overvaluationdriven stock acquirers suffer worse operating performance and lower long-run stock returns than control firms that are in the same industry, similarly overvalued at the same time, have similar size and Tobin’s q, but have not pursued …

Communicating Crisis: How Culture Influences Image Repair In Western And Asian Governments, Yvonne Siew‐Yoong Low, Jeni Varughese, Augustine Pang

Research Collection Lee Kong Chian School Of Business

Purpose: The purpose of this paper is to seek to understand the differences in image repair strategies adopted by two governments that operate in the Western and Asian societies when faced with similar crises. Design/methodology/approach: Textual analyses are presented of communication of Hurricane Katrina and Typhoon Morakot by the Taiwanese and US governments, respectively. Findings: Faced with similar accusations of slow response, the Asian culture, represented by the Taiwanese Government, used predominantly mortification and corrective action strategies. The Western culture, represented by the US Government, used predominantly bolstering and defeasibility and a mixed bag of other strategies such as shifting …

Socioeconomic Strata, Mobile Technology, And Education: A Comparative Analysis, Paul Kim, Teresita Hagashi, Laura Carillo, Irina Gonzales, Tamas Makany, Bommi Lee, Alberto Garate

Research Collection Lee Kong Chian School Of Business

Mobile devices are highly portable, easily distributable, substantially affordable, and have the potential to be pedagogically complementary resources in education. This study, incorporating mixed method analyses, discusses the implications of a mobile learning technology-based learning model in two public primary schools near the Mexico-USA border in the state of Baja California, Mexico. One school was located in an urban slum and the other in a rural village community. Empirical and ethnographic data were collected through a series of achievement tests, observations, surveys, and interviews involving 160 s grade school children recruited by convenience sampling. The general technology infrastructure, distinctive features …

Effects Of National Culture On Earnings Quality Of Banks, Chee Yeow Lim, Kanagaretnam Kiridaran, Gerald J. Lobo

Research Collection School Of Accountancy

We examine the relation between four dimensions of national culture and earnings quality of banks using a sample of banks from 39 countries. Our main analysis, which focuses on the pre-financial crisis period 1993–2006, indicates that banks in high individualism, high masculinity, and low uncertainty avoidance societies manage earnings to just-meet-or-beat the prior year's earnings. In tests of income smoothing through loan loss provisions, we find that banks in high individualism, high power distance, and low uncertainty avoidance societies report smoother earnings. Our exploratory analysis of the effects of national culture on accounting outcomes during the financial crisis period 2007–2008 …

Defending Against Cross Site Scripting Attacks, Lwin Khin Shar, Hee Beng Kuan Tan

Research Collection School Of Computing and Information Systems

Researchers have proposed multiple solutions to cross-site scripting, but vulnerabilities continue to exist in many Web applications due to developers' lack of understanding of the problem and their unfamiliarity with current defenses' strengths and limitations.

Grey Market For Indian Ipos: Investor Sentiment And After-Market Performance, Chandrasekhar Krishnamurti, Tiong Yang Thong, Vishwanath Ramanna

Research Collection Lee Kong Chian School Of Business

Extant research on developed markets shows that investor sentiment is a prominent feature in IPO grey markets. There is sparse work in the context of emerging markets. We fill this lacuna by studying the working of the Indian IPO market. We consider this work interesting and relevant for the following reasons. First, grey market trading always involves short-selling as securities are not yet available. Since legal and institutional environment is less developed in emerging markets, the functioning of grey markets is of interest to policy makers and financial economists. Second, retail investors participate to a greater extent in IPOs of …

Bayesian Hypothesis Testing In Latent Variable Models, Yong Li, Jun Yu

Research Collection School Of Economics

Hypothesis testing using Bayes factors (BFs) is known not to be well defined under the improper prior. In the context of latent variable models, an additional problem with BFs is that they are difficult to compute. In this paper, a new Bayesian method, based on decision theory and the EM algorithm, is introduced to test a point hypothesis in latent variable models. The new statistic is a by-product of the Bayesian MCMC output and, hence, easy to compute. It is shown that the new statistic is easy to interpret and appropriately defined under improper priors because the method employs a …

Labor Supply Responses To The 1990s Japanese Tax Reforms, Ken Yamada

Research Collection School Of Economics

The consumption-leisure choice model implies that an exogenous change in tax rates will induce a change in labor supply. This implication is expected to be important to labor supplied by secondary earners under a progressive tax system when spousal income alters effective marginal tax rates. This paper examines labor supply responses to the income tax changes associated with Japanese tax reforms during the 1990s. The results indicate that the hours-of-work elasticity with respect to the net-of-tax rate is 0.8 for married women.

General Construction Of Chameleon All-But-One Trapdoor Functions, Shengli Liu, Junzuo Lai, Robert H. Deng

Research Collection School Of Computing and Information Systems

Lossy trapdoor functions enable black-box construction of public key encryption (PKE) schemes secure against chosen-ciphertext attack [18]. Recently, a more efficient black-box construction of public key encryption was given in [13] with the help of chameleon all-but-one trapdoor functions (ABO-TDFs). In this paper, we propose a black-box construction for transforming any ABO-TDFs into chameleon ABO-TDFs with the help of chameleon hash functions. Instantiating the proposed general black-box construction of chameleon ABO-TDFs, we obtain the first chameleon ABO-TDFs based on the Decisional Diffie-Hellman (DDH) assumption.

A Generic Framework For Three-Factor Authentication: Preserving Security And Privacy In Distributed Systems, Xinyi Huang, Yang Xiang, Ashley Chonka, Jianying Zhou, Robert H. Deng

Research Collection School Of Computing and Information Systems

As part of the security within distributed systems, various services and resources need protection from unauthorized use. Remote authentication is the most commonly used method to determine the identity of a remote client. This paper investigates a systematic approach for authenticating clients by three factors, namely password, smart card, and biometrics. A generic and secure framework is proposed to upgrade two-factor authentication to three-factor authentication. The conversion not only significantly improves the information assurance at low cost but also protects client privacy in distributed systems. In addition, our framework retains several practice-friendly properties of the underlying two-factor authentication, which we …

Emerging Funding Models For Urban Infrastructure. A Case Study Of Urban Water Supply From India, Nv Krishna

2011 12th International Conference of the Society for Global Business and Economic Development

No abstract provided.

Do Merger-Related Operating Synergies Exist?, Gennaro Bernile, Scott W. Bauguess

Research Collection Lee Kong Chian School Of Business

Executives frequently forecast large operating efficiency gains from mergers. Using these projections, we study the impact of operating synergies on merger performance. Investors' reaction to mergers varies directly with the availability of these forecasts and the gains they imply, and post-merger operating performance increases with the predictable component of forecasted synergies based on deal characteristics. The realized improvements, however, do not depend on the availability of forecasts or the surprise they convey, and post-merger stock returns reconcile discrepancies between investors' ex ante beliefs and mergers' ex post performance related to management forecasts. Overall, the evidence supports the neoclassical view that …

The State Of Play Of Csr In Singapore, Eugene K. B. Tan

Lien Centre for Social Innovation: Research

Given Singapore’s status as an economic powerhouse in the Asian region, it might be reasonable to assume that the level of Corporate Social Responsibility (CSR) activity would be proportionate. However, in frequent comparisons of CSR across countries, both academically and anecdotally, Singapore seems to fall short.

The understanding of CSR has not kept pace with the expectations and demands placed on business by the various stakeholders, including consumers and governments. It would be worthwhile to understand the reasons why this is so.

The research has three objectives:

- To examine the drivers of and impediments to CSR in Singapore;

- …

A Hybrid Agent Architecture Integrating Desire, Intention And Reinforcement Learning, Ah-Hwee Tan, Yew-Soon Ong, Akejariyawong Tapanuj

Research Collection School Of Computing and Information Systems

This paper presents a hybrid agent architecture that integrates the behaviours of BDI agents, specifically desire and intention, with a neural network based reinforcement learner known as Temporal DifferenceFusion Architecture for Learning and COgNition (TD-FALCON). With the explicit maintenance of goals, the agent performs reinforcement learning with the awareness of its objectives instead of relying on external reinforcement signals. More importantly, the intention module equips the hybrid architecture with deliberative planning capabilities, enabling the agent to purposefully maintain an agenda of actions to perform and reducing the need of constantly sensing the environment. Through reinforcement learning, plans can also be …

Mining Weakly Labeled Web Facial Images For Search-Based Face Annotation, Dayang Wang, Steven C. H. Hoi, Ying He

Research Collection School Of Computing and Information Systems

In this paper, we investigate a search-based face annotation framework by mining weakly labeled facial images that are freely available on the internet. A key component of such a search-based annotation paradigm is to build a database of facial images with accurate labels. This is however challenging since facial images on the WWW are often noisy and incomplete. To improve the label quality of raw web facial images, we propose an effective Unsupervised Label Refinement (ULR) approach for refining the labels of web facial images by exploring machine learning techniques. We develop effective optimization algorithms to solve the large-scale learning …

Cryptanalysis Of Hsiang-Shih's Authentication Scheme For Multi-Server Architecture, Kuo-Hui Yeh, Nai-Wei Lo, Yingjiu Li

Research Collection School Of Computing and Information Systems

From user point of view, password-based remote user authentication technique is one of the most convenient and easy-to-use mechanisms to provide necessary security on system access. As the number of computer crimes in modern cyberspace has increased dramatically, the robustness of password-based authentication schemes has been investigated by industries and organizations in recent years. In this paper, a well-designed password-based authentication protocol for multi-server communication environment, introduced by Hsiang and Shih, is evaluated. Our security analysis indicates that their scheme is insecure against session key disclosure, server spoofing attack, and replay attack and behavior denial.

Regret Aversion In Reason-Based Choice, Terry Connolly, Jochen Reb

Research Collection Lee Kong Chian School Of Business

This research examines the moderating role of regret aversion in reason-based choice. Earlier research has shown that regret aversion and reason-based choice effects are linked through a common emphasis on decision justification, and that a simple manipulation of regret salience can eliminate the decoy effect, a well-known reason-based choice effect. We show here that the effect of regret salience varies in theory-relevant ways from one reason-based choice effect to another. For effects such as the select/reject and decoy effect, both of which were independently judged to be unreasonable bases for deciding, regret salience eliminated the effect. For the most-important attribute …

Outcomes Assessment Of Role-Play Scenarios For Teaching Responsible Conduct Of Research, Stephanie N. Seiler, Bradley J. Brummel, Kerri L. Anderson, Kyoung Jin Kim, Serena G. Wee, C. K. Gunsalus, Michael C. Loui

Research Collection School of Social Sciences

We describe the summative assessment of role-play scenarios that we previously developed to teach central topics in the responsible conduct of research (RCR) to graduate students in science and engineering. Interviews with role-play participants, with participants in a case discussion training session, and with untrained students suggested that role-playing might promote a deeper appreciation of RCR by shifting the focus away from wanting to simply “know the rules.“ We also present the results of a think-aloud case analysis study and describe the development of a behaviorally-anchored rating scale (BARS) to assess participants' case analysis performance.

The Dao Of Politics: Rites And Laws As Pragmatic Tools Of Government, Sor-Hoon Tan

Research Collection School of Social Sciences

No abstract provided.

Early Childhood Bilingualism Leads To Advances In Executive Attention: Dissociating Culture And Language, Sujin Yang, Hwajin Yang, Barbara Lust

Research Collection School of Social Sciences

This study investigated whether early especially efficient utilization of executive functioning in young bilinguals would transcend potential cultural benefits. To dissociate potential cultural effects from bilingualism, four-year-old U.S. Korean-English bilingual children were compared to three monolingual groups – English and Korean monolinguals in the U.S.A. and another Korean monolingual group, in Korea. Overall, bilinguals were most accurate and fastest among all groups. The bilingual advantage was stronger than that of culture in the speed of attention processing, inverse processing efficiency independent of possible speed-accuracy trade-offs, and the network of executive control for conflict resolution. A culture advantage favoring Korean monolinguals …

Growth, Opportunity, And Inequality: Some Empirics From Singapore, Kong Weng Ho

Research Collection School Of Economics

While the strategy of openness had earned Singapore rapid economic growth, upward social mobility, and possibly decreasing inequality in the early years of development, the more recent years has seen increasing inequality. With this inequality comes an underlying possibly diminished upward inter-generational mobility, due to skill-biased growth processes, skill-biased parental influence, liberalisation in the education industry, and structural changes in the society, which hurt the human capital accumulation of children in families under economic and intra-household stresses. In particular, paternal influence on educational aspirations and attainment is more pronounced than maternal influence. Non-Chinese and youths from disrupted families are worse …

Sme Inc: Corporate Success And Social Good, Paul Lim, Brendan Barrett, Nils Steinbrecher, Tomoki Fujii, Ted Tschang, Lieven Demeester

Research Collection School Of Economics

Panel of experts share their views ranging from the definition of sustainable business to how governments should lead by example.

Explaining Contractual Remoteness In Singapore, Yihan Goh

Research Collection Yong Pung How School Of Law

The Singapore Court of Appeal (the Court of Appeal) has in MFM Restaurants Pte Ltd v Fish & Co Restaurants Pte Ltd rejected Lord Hoffinann's assumption of responsibility test (articulated in The Achilleas) to determine whether damages are too remote in a contractual claim. The Court of Appeal, however, retained assumption of responsibility as a concept to explain the orthodox test for remoteness as embodied in Hadley v Baxendale. To that extent, it expressly accepted Lord Hoffmann's approach in The Achilleas in so far as the concept of assumption of responsibility is already incorporated or embodied in both limbs of …

The Final Twist In Common Intention? Daniel Vijay S/O Katherasan V. Public Prosecutor, Siyuan Chen

Research Collection Yong Pung How School Of Law

It was only in 2008 that the Court of Appeal made a seminal restatement of the law on common intention, particularly with respect to liability in so-called ‘twin crime’ situations. The question posed then was posed again recently in Daniel Vijay: what exactly is the required mens rea for the secondary offender in such situations? In 2008, the Court of Appeal said that the secondary offender had to subjectively know that one in his party might likely commit the collateral offence in furtherance of the common intention of carrying out the primary offence. Now, in Daniel Vijay, the Court …