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Articles 5971 - 6000 of 8706
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The 2012 Amendments To Singapore's Evidence Act: More Questions Than Answers As Regards Expert Opionion Evidence?, Siyuan Chen
The 2012 Amendments To Singapore's Evidence Act: More Questions Than Answers As Regards Expert Opionion Evidence?, Siyuan Chen
Research Collection Yong Pung How School Of Law
Singapore amended the expert opinion evidence provisions in its Evidence Act (EA) in 2012. The criteria for admissibility have been broadened, but the courts are now also expressly given the discretion to exclude relevant expert opinion evidence if it is ‘in the interests of justice’. This article explains why the 2012 amendments have raised more questions than answered them. First, Parliament did not appear to have properly appreciated the distinction—as conceptualised by the EA—between legal and logical relevance and relevance and admissibility. Second, it did not appear to have appreciated the distinction between general and specific relevance. Third, the introduction …
Robust Virtual Implementation: Toward A Reinterpretation Of The Wilson Doctrine, Georgy Artemov, Takashi Kunimoto, Roberto Serrano
Robust Virtual Implementation: Toward A Reinterpretation Of The Wilson Doctrine, Georgy Artemov, Takashi Kunimoto, Roberto Serrano
Research Collection School Of Economics
We study a mechanism design problem where arbitrary restrictions are placed on the sets of first-order beliefs of agents. Calling these restrictions Δ, we use Δ-rationalizability (Battigalli and Siniscalchi, 2003, [5]) as our solution concept, and require that a mechanism virtually implement a socially desirable outcome. We obtain two necessary conditions, Δ-incentive compatibility and Δ-measurability and show that the latter is satisfied as long as a particular zero-measure set of first-order beliefs is ruled out. In environments allowing small transfers of utility among agents, these two conditions are also sufficient.
Almost Touching: Parent-Child Remote Communication Using The Sharetable System, Svetlana Yarosh, Anthony Tang, Sanika Mokashi, Gregory D. Abowd
Almost Touching: Parent-Child Remote Communication Using The Sharetable System, Svetlana Yarosh, Anthony Tang, Sanika Mokashi, Gregory D. Abowd
Research Collection School Of Computing and Information Systems
We deployed the ShareTable - a system that provides easy-to-initiate videochat and a shared tabletop task space - in four divorced households. Throughout the month of its use, the families employed the ShareTable to participate in shared activities, share emotional moments, and communicate closeness through metaphorical touch. The ShareTable provided a number of advantages over the phone and was easier to use than standard videoconferencing. However, it did also introduce concerns over privacy and new sources of conflict about appropriate calling practices. We relate our findings to the larger research landscape and present implications for future work.
Bias In The Mean Reversion Estimator In Continuous-Time Gaussian And Lévy Processes, Yong Bao, Aman Ullah, Yun Wang, Jun Yu
Bias In The Mean Reversion Estimator In Continuous-Time Gaussian And Lévy Processes, Yong Bao, Aman Ullah, Yun Wang, Jun Yu
Research Collection School Of Economics
Continuous-time Levy processes have become increasingly popular in the asset pricing literature and estimation of the mean reversion parameter has attracted attention recently. This paper develops the approximate nite-sample bias of the ordinary least squares or quasi maximum likelihood estimator of the mean reversion parameter in continuous-time Levy processes. Simulations show that in general the approximate bias works well in capturing the true bias of the mean reversion estimator under difference scenarios. However, when the time span is small and the mean reversion parameter is approaching its lower bound, we find it more difficult to approximate well the nite-sample bias.
Presidential Pardon In Singapore: A Comment On Yong Vui Kong V Ag, Shubhankar Dam
Presidential Pardon In Singapore: A Comment On Yong Vui Kong V Ag, Shubhankar Dam
Research Collection Yong Pung How School Of Law
This paper critically analyses the decision of the Singapore Court of Appeal in Yong Vui Kong v Attorney-General in relation to presidential pardon. Two questions were central to the case. First, is the President bound by the decision of the Cabinet in pardon-related matters? Secondly, are decisions regarding pardon—whether made by the Cabinet or President—subject to judicial review? In relation to the first question, the Court based its reasoning on Singapore's political system being a Westminster-inspired model and, therefore, that the President generally undertakes the same functions as the British monarch. However, this paper identifies the unique features of Singapore's …
A Cautionary Tale: Some Insights Regarding Judicial Activism From The National Experience, Maartje De Visser
A Cautionary Tale: Some Insights Regarding Judicial Activism From The National Experience, Maartje De Visser
Research Collection Yong Pung How School Of Law
Courts, whether national or European, are sometimes subject to charges of judicial activism. Adopting a comparative perspective, this contribution charts the ways in which constitutional courts in the Member States have sought to mitigate or pre-empt charges of activism. The primary purpose is to identify attractive solutions or lessons the ECJ may draw from dealing with this perception of judicial activism. It is important at the outset to be clear about what is meant by ‘judicial activism’. Judicial activism is often used as a slogan to communicate dislike or disagreement with a particular judgment or line of case law. While …
Prosecutorial Discretion And The Legal Limits In Singapore, Gary Kok Yew Chan
Prosecutorial Discretion And The Legal Limits In Singapore, Gary Kok Yew Chan
Research Collection Yong Pung How School Of Law
Article 35(8) of the Constitution of the Republic of Singapore states that the Attorney-General, as the Public Prosecutor, “shall have the power, exercisable at his discretion, to institute, conduct or discontinue any proceedings for any offence”. This prosecutorial discretion, though extremely wide, is not an unfettered one and must not be exercised in bad faith or in breach of constitutional rights. With respect to the equality provision in the Constitution, the Prosecution has to give unbiased consideration to all potential accused persons and avoid any irrelevant considerations. The article considers whether the presumption of the constitutionality of prosecutorial decisions and …
A Reconsideration Of The Shareholder's Remedy For Oppression In Singapore, Pearlie Koh
A Reconsideration Of The Shareholder's Remedy For Oppression In Singapore, Pearlie Koh
Research Collection Yong Pung How School Of Law
The statutory remedy for oppression plays an important role in minority shareholder protection in Singapore. Both the scope of its application and the court's jurisdiction to make remedial orders must necessarily be wide in order for the remedy to be effective. Nevertheless, the remedy is not without limits. Indeed, it is crucial that the boundaries of the remedy be made clear so that legitimate rule of the majority is not too often, and erroneously, equated with tyranny by the majority. This paper considers a number of issues as to the scope of the oppression remedy in Singapore through a careful …
Infrastructure-Assisted Smartphone-Based Adl Recognition In Multi-Inhabitant Smart Environments, Nirmalya Roy, Archan Misra, Diane Cook
Infrastructure-Assisted Smartphone-Based Adl Recognition In Multi-Inhabitant Smart Environments, Nirmalya Roy, Archan Misra, Diane Cook
Research Collection School Of Computing and Information Systems
We propose a hybrid approach for recognizing complex Activities of Daily Living that lie between the two extremes of intensive use of body-worn sensors and the use of infrastructural sensors. Our approach harnesses the power of infrastructural sensors (e.g., motion sensors) to provide additional `hidden' context (e.g., room-level location) of an individual and combines this context with smartphone-based sensing of micro-level postural/locomotive states. The major novelty is our focus on multi-inhabitant environments, where we show how spatiotemporal constraints can be used to significantly improve the accuracy and computational overhead of traditional coupled-HMM based approaches. Experimental results on a smart home …
Empirical Evaluation Of Bug Linking, Tegawende F. Bissyande, Ferdian Thung, Shaowei Wang, David Lo, Lingxiao Jiang, Laurent Reveillere
Empirical Evaluation Of Bug Linking, Tegawende F. Bissyande, Ferdian Thung, Shaowei Wang, David Lo, Lingxiao Jiang, Laurent Reveillere
Research Collection School Of Computing and Information Systems
To collect software bugs found by users, development teams often setup bug trackers using systems such as Bugzilla. Developers would then fix some of the bugs and commit corresponding code changes into version control systems such as svn or git. Unfortunately, the links between bug reports and code changes are missing for many software projects as the bug tracking and version control systems are often maintained separately. Yet, linking bug reports to fix commits is important as it could shed light into the nature of bug fixing processes and expose patterns in software management. Bug linking solutions, such as ReLink, …
Adoption Of Software Testing In Open Source Projects: A Preliminary Study On 50,000 Projects, Pavneet Singh Kochhar, Tegawende F. Bissyande, David Lo, Lingxiao Jiang
Adoption Of Software Testing In Open Source Projects: A Preliminary Study On 50,000 Projects, Pavneet Singh Kochhar, Tegawende F. Bissyande, David Lo, Lingxiao Jiang
Research Collection School Of Computing and Information Systems
In software engineering, testing is a crucial activity that is designed to ensure the quality of program code. For this activity, development teams spend substantial resources constructing test cases to thoroughly assess the correctness of software functionality. What is however the proportion of open source projects that include test cases? What kind of projects are more likely to include test cases? In this study, we explore 50,000 projects and investigate the correlation between the presence of test cases and various project development characteristics, including the lines of code and the size of development teams.
Singapore Food Seriously On My Mind, Margaret Chan
Singapore Food Seriously On My Mind, Margaret Chan
Research Collection School of Social Sciences
No abstract provided.
Data Visualization On Interactive Surfaces: A Research Agenda, Petra Isenberg, Tobias Isenberg, Tobias Hesselmann, Bongshin Lee, Ulrich Von Zadow, Anthony Tang
Data Visualization On Interactive Surfaces: A Research Agenda, Petra Isenberg, Tobias Isenberg, Tobias Hesselmann, Bongshin Lee, Ulrich Von Zadow, Anthony Tang
Research Collection School Of Computing and Information Systems
Interactive tabletops and surfaces (ITSs) provide rich opportunities for data visualization and analysis and consequently are used increasingly in such settings. A research agenda of some of the most pressing challenges related to visualization on ITSs emerged from discussions with researchers and practitioners in human-computer interaction, computer-supported collaborative work, and a variety of visualization fields at the 2011 Workshop on Data Exploration for Interactive Surfaces (Dexis 2011)
Semi-Supervised Heterogeneous Fusion For Multimedia Data Co-Clustering, Lei Meng, Ah-Hwee Tan, Dong Xu
Semi-Supervised Heterogeneous Fusion For Multimedia Data Co-Clustering, Lei Meng, Ah-Hwee Tan, Dong Xu
Research Collection School Of Computing and Information Systems
Co-clustering is a commonly used technique for tapping the rich meta-information of multimedia web documents, including category, annotation, and description, for associative discovery. However, most co-clustering methods proposed for heterogeneous data do not consider the representation problem of short and noisy text and their performance is limited by the empirical weighting of the multi-modal features. In this paper, we propose a generalized form of Heterogeneous Fusion Adaptive Resonance Theory, called GHF-ART, for co-clustering of large-scale web multimedia documents. By extending the two-channel Heterogeneous Fusion ART (HF-ART) to multiple channels, GHF-ART is designed to handle multimedia data with an arbitrarily rich …
Accountable Authority Identity-Based Encryption With Public Traceability, Junzuo Lai, Robert H. Deng, Yunlei Zhao, Jian Weng
Accountable Authority Identity-Based Encryption With Public Traceability, Junzuo Lai, Robert H. Deng, Yunlei Zhao, Jian Weng
Research Collection School Of Computing and Information Systems
At Crypto’07, Goyal introduced the notion of accountable authority identity-based encryption (A-IBE) in order to mitigate the inherent key escrow problem in identity-based encryption, and proposed two concrete constructions. In an A-IBE system, if the private key generator (PKG) distributes a decryption key or produces an unauthorized decryption box for a user maliciously, it runs the risk of being caught and sued in the court of law with the help of a tracing algorithm. Subsequent efforts focused on constructions of A-IBE schemes with enhanced security. In these A-IBE constructions, the tracing algorithm needs to take a user’s decryption key as …
Category Divergence, Straddling, And Currency: Open Innovation And The Legitimation Of Illegitimate Categories, Oliver Alexy, Gerard George
Category Divergence, Straddling, And Currency: Open Innovation And The Legitimation Of Illegitimate Categories, Oliver Alexy, Gerard George
Research Collection Lee Kong Chian School Of Business
The organizational literature is increasingly interested in the origins and consequences of category emergence. We examine the effects of being affiliated with categories initially considered illegitimate (‘divergence’), and of organizational attempts to blur the boundaries between categories (‘straddling’), on capital market reactions to firm announcements. We develop arguments for how these effects likely vary with increasing legitimation (‘currency’) of the category. We apply event study methodology to the complete population of firms' announcements of open source activities, an open innovation model for software development that is novel and defies the extant dominant logic of software production and valorization. Over a …
The Undercommons: Fugitive Planning And Black Study, Stefano Harney, Fred Moten
The Undercommons: Fugitive Planning And Black Study, Stefano Harney, Fred Moten
Research Collection Lee Kong Chian School Of Business
In this series of essays, Fred Moten and Stefano Harney draw on the theory and practice of the black radical tradition as it supports, inspires, and extends contemporary social and political thought and aesthetic critique. Today the general wealth of social life finds itself confronted by mutations in the mechanisms of control: the proliferation of capitalist logistics, governance by credit, and the management of pedagogy. Working from and within the social poesis of life in THE UNDERCOMMONS, Moten and Harney develop and expand an array of concepts: study, debt, surround, planning, and the shipped. On the fugitive path of an …
Transnational Youth Transitions: Becoming Adults Between Vancouver And Hong Kong, Justin Kh Tse, Johanna L. Waters
Transnational Youth Transitions: Becoming Adults Between Vancouver And Hong Kong, Justin Kh Tse, Johanna L. Waters
Research Collection School of Social Sciences
In the context of the academic interest shown in the enduring transnation-alism of contemporary migrants and in the modes of transitions to adulthood in different global settings, in this article we examine the transnational lives of adolescents moving between Vancouver (Canada) and Hong Kong. While there is a lot of literature on the parents’ political and economic calculations, there is very little on how adolescents in these situations articulate their geographical sensibilities. We draw on three periods of fieldwork undertaken in 2002, 2008 and 2010 during which we employed a transnational methodology to interview young people in Vancouver and Hong …
A Nonparametric Goodness-Of-Fit-Based Test For Conditional Heteroskedasticity, Liangjun Su, Aman Ullah
A Nonparametric Goodness-Of-Fit-Based Test For Conditional Heteroskedasticity, Liangjun Su, Aman Ullah
Research Collection School Of Economics
In this paper we propose a new nonparametric test for conditional heteroskedasticity based on a measure of nonparametric goodness-of-fit (R2) that is obtained from the local polynomial regression of the residuals from a parametric regression on some covariates. We show that after being appropriately standardized, the nonparametric R2 is asymptotically normally distributed under the null hypothesis and a sequence of Pitman local alternatives. We also prove the consistency of the test and propose a bootstrap method to obtain the bootstrap p-values. We conduct a small set of simulations and compare our test with some popular parametric and nonparametric tests in …
Kinectarms: A Toolkit For Capturing And Displaying Arm Embodiments In Distributed Tabletop Groupware, Aaron Genest, Carl Gutwin, Anthony Tang, Michael Kalyn, Zenja Ivkovic
Kinectarms: A Toolkit For Capturing And Displaying Arm Embodiments In Distributed Tabletop Groupware, Aaron Genest, Carl Gutwin, Anthony Tang, Michael Kalyn, Zenja Ivkovic
Research Collection School Of Computing and Information Systems
Gestures are a ubiquitous part of human communication over tables, but when tables are distributed, gestures become difficult to capture and represent. There are several problems: extracting arm images from video, representing the height of the gesture, and making the arm embodiment visible and understandable at the remote table. Current solutions to these problems are often expensive, complex to use, and difficult to set up. We have developed a new toolkit - KinectArms - that quickly and easily captures and displays arm embodiments. KinectArms uses a depth camera to segment the video and determine gesture height, and provides several visual …
Authscan: Automatic Extraction Of Web Authentication Protocols From Implementations, Guangdong Bai, Jike Lei, Guozhu Meng, Sai Sathyanarayan Venkatraman, Prateek Saxena, Jun Sun, Yang Liu, Jin Song Dong
Authscan: Automatic Extraction Of Web Authentication Protocols From Implementations, Guangdong Bai, Jike Lei, Guozhu Meng, Sai Sathyanarayan Venkatraman, Prateek Saxena, Jun Sun, Yang Liu, Jin Song Dong
Research Collection School Of Computing and Information Systems
Ideally, security protocol implementations should be formally verified before they are deployed. However, this is not true in practice. Numerous high-profile vulnerabilities have been found in web authentication protocol implementations, especially in single-sign on (SSO) protocols implementations recently. Much of the prior work on authentication protocol verification has focused on theoretical foundations and building scalable verification tools for checking manually-crafted specifications [17, 18, 44]. In this paper, we address a complementary problem of automatically extracting specifications from implementations. We propose AUTHSCAN, an end-to-end platform to automatically recover authentication protocol specifications from their implementations. AUTHSCAN finds a total of 7 security …
Landscape Configuration And Urban Heat Island Effects: Assessing The Relationship Between Landscape Characteristics And Land Surface Temperature In Phoenix, Arizona, John Patrick Connors, Christopher S. Galletti, Winston T. L. Chow
Landscape Configuration And Urban Heat Island Effects: Assessing The Relationship Between Landscape Characteristics And Land Surface Temperature In Phoenix, Arizona, John Patrick Connors, Christopher S. Galletti, Winston T. L. Chow
Research Collection School of Social Sciences
The structure of urban environments is known to alter local climate, in part due to changes in land cover. A growing subset of research focuses specifically on the UHI in terms of land surface temperature by using data from remote sensing platforms. Past research has established a clear relationship between land surface temperature and the proportional area of land covers, but less research has specifically examined the effects of the spatial patterns of these covers. This research considers the rapidly growing City of Phoenix, Arizona in the United States. To better understand how landscape structure affects local climate, we explored …
Rising Income And The Subjective Well-Being Of Nations, Ed Diener, Louis Tay, Shigehiro Oishi
Rising Income And The Subjective Well-Being Of Nations, Ed Diener, Louis Tay, Shigehiro Oishi
Research Collection School of Social Sciences
We explored whether rising income in nations is associated with increasing subjective well-being (SWB), with several advances over earlier work. Our methods are improved in that across time, the same well-being questions were asked in the same order, and we employed broad and equivalent representative samples over time from a large number of nations. We also assessed psychosocial factors that might mediate the relation of income and SWB. We found that changes in household income were associated with concomitant changes in life evaluations, positive feelings, and negative feelings. The effects of gross domestic product (GDP) change were weaker and significant …
The Anti-Federalist Strand In Progressive Politics And Political Thought, Elvin T. Lim
The Anti-Federalist Strand In Progressive Politics And Political Thought, Elvin T. Lim
Research Collection School of Social Sciences
In this article, the author argues that the Progressives can be as much characterized as the anti statists of the nineteenth century as the statists of the twentieth century because their overriding goal was the destruction of the party state and not, directly, the creation of the bureaucratic state. They found in Anti-Federalist political thought a general anti statist template that they used to articulate their specific objection to the nineteenth-century party state. This template comprised a mutual commitment to simple government, the common good as a pre-institutional reality, democracy, direct and responsive government, fear of elite rule, civic education, …
Managing A Global Partnership Model: Lessons From The Boeing 787 'Dreamliner' Program, Suresh Kotha, Kannan Srikanth
Managing A Global Partnership Model: Lessons From The Boeing 787 'Dreamliner' Program, Suresh Kotha, Kannan Srikanth
Research Collection Lee Kong Chian School Of Business
Little research has examined the integration challenges in globally disaggregated value chains in a complex NPD effort or the tools managers use to overcome such challenges. Drawing on Boeing's 787 program, we highlight integration challenges Boeing faced and how it addressed them through recourse to partial co-location, establishing a centralized integration support center, reintegrating some activities performed by suppliers, and using its bargaining power to facilitate changes. The integration tools Boeing employed were geared toward two primary objectives: (1) gaining increased visibility of actions and visibility of knowledge networks across partner firms; and (2) motivating partners to take actions to …
Standardized Lm Tests For Spatial Error Dependence In Linear Or Panel Regressions, Badi H. Baltagi, Zhenlin Yang
Standardized Lm Tests For Spatial Error Dependence In Linear Or Panel Regressions, Badi H. Baltagi, Zhenlin Yang
Research Collection School Of Economics
The robustness of the Lagrange Multiplier (LM) tests for spatial error dependence of Burridge (1980) and Born and Breitung (2011) for the linear regression model, and Anselin (1988) and Debarsy and Etur (2010) for the panel regression model with random or fixed effects are examined. While all tests are asymptotically robust against distributional mis‐specification, their finite sample behaviour may be sensitive to the spatial layout. To overcome this shortcoming, standardized LM tests are suggested. Monte Carlo results show that the new tests possess good finite sample properties. An important observation made throughout this study is that the LM tests for …
I Can Be You: Questioning The Use Of Keystroke Dynamics As Biometrics, Chee Meng Tey, Payas Gupta, Debin Gao
I Can Be You: Questioning The Use Of Keystroke Dynamics As Biometrics, Chee Meng Tey, Payas Gupta, Debin Gao
Research Collection School Of Computing and Information Systems
Keystroke dynamics refer to information about the typing patterns of individuals, such as the relative timing when the individual presses and releases each key. Prior studies suggest that such patterns are unique and cannot be easily imitated. This lays the foundation for the use of keystroke biometrics in authentication systems. The research effort in this area has thus far focused on novel detection techniques to differentiate between legitimate users and imposters. In this paper, we demonstrate a novel feedback and training interface named Mimesis. Mimesis provides both positive and negative feedback on the differences between a submitted pattern vs. a …
Simple Identity-Based Encryption With Mediated Rsa, Xuhua Ding, Gene Tsudik
Simple Identity-Based Encryption With Mediated Rsa, Xuhua Ding, Gene Tsudik
Research Collection School Of Computing and Information Systems
Identity-based encryption (IBE) [5] and digital signatures are important tools in modern secure communication. In general, identity-based cryptographic methods facilitate easy introduction of public key cryptography by allowing an entity’s public key to be derived from some arbitrary identification value such as an email address or a phone number. Identity-based cryptography greatly reduces the need for, and reliance on, public key certificates. Mediated RSA (mRSA) [4] is a simple and practical method of splitting RSA private keys between the user and the Security Mediator (SEM). Neither the user nor the SEM can cheat one another since each signature or decryption …
Combining Crowdsourcing And Google Street View To Identify Street-Level Accessibility Problems, Kotaro Hara, Victoria Le, Jon Froehlich
Combining Crowdsourcing And Google Street View To Identify Street-Level Accessibility Problems, Kotaro Hara, Victoria Le, Jon Froehlich
Research Collection School Of Computing and Information Systems
Jon FroehlichAbstractPoorly maintained sidewalks, missing curb ramps, and other obstacles pose considerable accessibility challenges; however, there are currently few, if any, mechanisms to determine accessible areas of a city a priori. In this paper, we investigate the feasibility of using untrained crowd workers from Amazon Mechanical Turk (turkers) to find, label, and assess sidewalk accessibility problems in Google Street View imagery. We report on two studies: Study 1 examines the feasibility of this labeling task with six dedicated labelers including three wheelchair users; Study 2 investigates the comparative performance of turkers. In all, we collected 13,379 labels and 19,189 verification …
K-Pop Live: Social Networking & Language Learning Platform, Thomas Chua, Chin Leng Ong, Kian Ming Png, Aloysius Lau, Houston Toh, Feida Zhu, Kyong Jin Shim, Ee-Peng Lim
K-Pop Live: Social Networking & Language Learning Platform, Thomas Chua, Chin Leng Ong, Kian Ming Png, Aloysius Lau, Houston Toh, Feida Zhu, Kyong Jin Shim, Ee-Peng Lim
Research Collection School Of Computing and Information Systems
K-Pop live is a social networking and language learning platform developed by an undergraduate student team from Singapore Management University. K-Pop live aims to combine social media together with gamification to promote Korean culture. It consolidates all relevant Tweets from Twitter as well as videos from YouTube. The platform allows the user to connect with his friends who share similar interests in terms of K-pop artists and music.