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Articles 7531 - 7560 of 8679
Full-Text Articles in Entire DC Network
Benchmarks For Text Analysis: A Response To Budge And Pennings, Kenneth Benoit, Michael Laver
Benchmarks For Text Analysis: A Response To Budge And Pennings, Kenneth Benoit, Michael Laver
Research Collection School of Social Sciences
Budge and Pennings (2007) criticize the “Wordscores” method for computerized content analysis on essentially two grounds. The first is that the best test of Wordscores accuracy is whether it can “reproduce the rich time series produced by the MRG/CMP covering a 50 year period” (Budge and Pennings, 2007: 5), which Budge and Pennings claim it does not do. The second is that Wordscores time series estimates, as implemented by Budge and Pennings, yield very little variation around mean scores for the entire time series. In this brief response we make three simple points.
Estimating Party Policy Positions: Comparing Expert Surveys And Hand-Coded Content Analysis, Kenneth Benoit, Michael Laver
Estimating Party Policy Positions: Comparing Expert Surveys And Hand-Coded Content Analysis, Kenneth Benoit, Michael Laver
Research Collection School of Social Sciences
In this paper we compare estimates of the left-right positions of political parties derived from an expert survey recently completed by the authors with those derived by the Comparative Manifestos Project (CMP) from the content analysis of party manifestos. Having briefly described the expert survey, we first explore the substantive policy content of left and right in the expert survey estimates. We then compare the expert survey to the CMP method on methodological grounds. Third, we directly compare the expert survey results to the CMP results for the most recent time period available, revealing some agreement but also numerous inconsistencies …
Giving The Learners Control Of Navigation: Cognitive Gains And Losses, Tamas Makany, Paula C. Engelbrecht, Katie Meadmore, Richard Dudley, Edward S. Redhead, Itiel E. Dror
Giving The Learners Control Of Navigation: Cognitive Gains And Losses, Tamas Makany, Paula C. Engelbrecht, Katie Meadmore, Richard Dudley, Edward S. Redhead, Itiel E. Dror
Research Collection Lee Kong Chian School Of Business
E-learning often involves exploration of the information space that is somewhat similar to the exploration of space in the real world. Initial paths taken in any environment (be it a physical, virtual, or any other type) will not only guide the discoveries of what the environment contains, but also formulate the underlying organising principles. The suggested route in an art gallery frequently presents artworks that are either chronological or conceptually tied together. Deviating from this –and taking a route of our own, if at all possible– might be either confusing or insightful. The structure of the information, and the control …
A Cautionary Note On The Effects Of Range Restriction On Predictor Intercorrelations, Paul R. Sackett, Filip Lievens, Christopher M. Berry, Richard N. Landers
A Cautionary Note On The Effects Of Range Restriction On Predictor Intercorrelations, Paul R. Sackett, Filip Lievens, Christopher M. Berry, Richard N. Landers
Research Collection Lee Kong Chian School Of Business
The purpose of this research report is to highlight a unique set of issues that arise when considering the effects of range restriction in the context of estimating predictor intercorrelations. Three approaches are used to illustrate the issue: simulation, a concrete applied example, and a reanalysis of a meta-analysis of ability-interview correlations. The general conclusion is that a predictor intercorrelation can differ dramatically from the population value when both predictors are used in a composite that is used operationally for selection. The compensatory nature of a composite means that low scorers on one predictor can only obtain high scores on …
Comprehensive Income, Future Earnings, And Market Mispricing, Jong-Hag Choi, Somnath Das, Yoonseok Zang
Comprehensive Income, Future Earnings, And Market Mispricing, Jong-Hag Choi, Somnath Das, Yoonseok Zang
Research Collection School Of Accountancy
No abstract provided.
Bias In Dynamic Panel Estimation With Fixed Effects, Incidental Trends And Cross Section Dependence, Peter C. B. Phillips, Donggyu Sul
Bias In Dynamic Panel Estimation With Fixed Effects, Incidental Trends And Cross Section Dependence, Peter C. B. Phillips, Donggyu Sul
Research Collection School Of Economics
Explicit asymptotic bias formulae are given for dynamic panel regression estimators as the cross section sample size N --> ∞. The results extend earlier work by Nickell [1981. Biases in dynamic models with fixed effects. Econometrica 49, 1417-1426] and later authors in several directions that are relevant for practical work, including models with unit roots, deterministic trends, predetermined and exogenous regressors, and errors that may be cross sectionally dependent. The asymptotic bias is found to be so large when incidental linear trends are fitted and the time series sample size is small that it changes the sign of the autoregressive …
Long Run Variance Estimation And Robust Regression Testing Using Sharp Origin Kernels With No Truncation, Peter C. B. Phillips, Yixiao Sun, Sainan Jin
Long Run Variance Estimation And Robust Regression Testing Using Sharp Origin Kernels With No Truncation, Peter C. B. Phillips, Yixiao Sun, Sainan Jin
Research Collection School Of Economics
A new family of kernels is suggested for use in long run variance (LRV) estimation and robust regression testing. The kernels are constructed by taking powers of the Bartlett kernel and are intended to be used with no truncation (or bandwidth) parameter. As the power parameter ([rho]) increases, the kernels become very sharp at the origin and increasingly downweight values away from the origin, thereby achieving effects similar to a bandwidth parameter. Sharp origin kernels can be used in regression testing in much the same way as conventional kernels with no truncation, as suggested in the work of Kiefer and …
Malicious Kgc Attacks In Certificateless Cryptography, Man Ho Au, Jing Chen, Joseph K. Liu, Yi Mu, Duncan S. Wong, Guomin Yang, Guomin Yang
Malicious Kgc Attacks In Certificateless Cryptography, Man Ho Au, Jing Chen, Joseph K. Liu, Yi Mu, Duncan S. Wong, Guomin Yang, Guomin Yang
Research Collection School Of Computing and Information Systems
Identity-based cryptosystems have an inherent key escrow issue, that is, the Key Generation Center (KGC) always knows user secret key. If the KGC is malicious, it can always impersonate the user. Certificateless cryptography, introduced by Al-Riyami and Paterson in 2003, is intended to solve this problem. However, in all the previously proposed certificateless schemes, it is always assumed that the malicious KGC starts launching attacks (so-called Type II attacks) only after it has generated a master public/secret key pair honestly. In this paper, we propose new security models that remove this assumption for both certificateless signature and encryption schemes. Under …
Efficient Algorithms For Machine Scheduling Problems With Earliness And Tardiness Penalties, Guang Feng, Hoong Chuin Lau
Efficient Algorithms For Machine Scheduling Problems With Earliness And Tardiness Penalties, Guang Feng, Hoong Chuin Lau
Research Collection School Of Computing and Information Systems
In this paper, we study the multi-machine scheduling problem with earliness and tardiness penalties and sequence dependent setup times. This problem can be decomposed into two subproblems—sequencing and timetabling. Sequencing focuses on assigning each job to a fixed machine and determine the job sequence on each machine. We call such assignment a semi-schedule. Timetabling focuses on finding an executable schedule from the semi-schedule via idle-time insertion. Sequencing is strongly NP-hard in general. Although timetabling is polynomial-time solvable, it can become a computational bottleneck if the procedure is executed many times within a larger framework. This paper makes two contributions. We …
Cyber-Trespass And 'Unauthorized Access' As Legal Mechanisms Of Access Control: Lessons From The Us Experience, Mary W. S. Wong
Cyber-Trespass And 'Unauthorized Access' As Legal Mechanisms Of Access Control: Lessons From The Us Experience, Mary W. S. Wong
Research Collection Yong Pung How School Of Law
The common law doctrine of trespass to chattels has recently been revived and applied by courts in the United States (US) to cover intrusions (in the form of electronic signals) to computer systems connected to the Internet. These cases represent judicial recognition of the need to protect certain unwanted intrusions in cyberspace, though the principles developed therewith are remarkably expansive. As such, they overlap with the concept of ‘unauthorized access’ under computer misuse legislation in the US and elsewhere. This overlap has yet to be judicially acknowledged. Since the US, the United Kingdom and other common law countries not only …
A Cardan’S Discriminant Approach To Predicting Currency Crashes, Benedict Seng Kee Koh, Wai Mun Fong, Fabrice Chan
A Cardan’S Discriminant Approach To Predicting Currency Crashes, Benedict Seng Kee Koh, Wai Mun Fong, Fabrice Chan
Research Collection Lee Kong Chian School Of Business
This paper models large swings in exchange rates by introducing nonlinearity via the generalized normal (GEN) distribution [Lye, J.N., Martin, V.L., 1993. Robust estimation, nonnormalities and generalized exponential distributions. Journal of the American Statistical Association 88, 261-267]. As the distribution allows for bimodality, a switch between modes may give rise to currency crashes. A statistic known as Cardan's discriminant, based on the shape parameters of the GEN, is used to detect bimodality. The Cardan's discriminant is found to reliably predict currency crashes for eight emerging countries and generate relatively low false signals for stable currencies.
Cognitive And Affective Aspects Of Thigmotaxis Strategy In Humans, Janos Kallai, Tamas Makany, Arpad Csatho, Kazmer Karadi, David Horvath, Beatrix Kovacs-Labadi, Robert Jarai, Lynn Nadel, Jake W. Jacobs
Cognitive And Affective Aspects Of Thigmotaxis Strategy In Humans, Janos Kallai, Tamas Makany, Arpad Csatho, Kazmer Karadi, David Horvath, Beatrix Kovacs-Labadi, Robert Jarai, Lynn Nadel, Jake W. Jacobs
Research Collection Lee Kong Chian School Of Business
The present article describes the cognitive and emotional aspects of human thiginotaxis (a wall-following spatial strategy) during exploration of virtual and physical spaces. The authors assessed 106 participants with spatial and nonspatial performance-based learning-memory tasks and with fear and anxiety questionnaires. The results demonstrate that thiginotaxis plays a distinct role at different phases of spatial learning. The 1st phase shows a positive correlation between thigmotaxis and general phobic avoidance, whereas there is no association between thigmotaxis and general phobic avoidance during later phases of learning. Furthermore, participants who underperformed in working memory tests and in a spatial construction task exhibited …
Segmentation Of Overlapping Particles In Automatic Size Analysis Using Multi-Flash Imaging, Tze K Koh, Nicholas Miles, Steve Morgan, Barrie Hayes-Gill
Segmentation Of Overlapping Particles In Automatic Size Analysis Using Multi-Flash Imaging, Tze K Koh, Nicholas Miles, Steve Morgan, Barrie Hayes-Gill
Research Collection College of Integrative Studies
In this paper, we propose a novel hardware approach to image segmentation, specifically in the case of overlapping particles. Our research is based on multi-flash imaging (MFI), originally developed to detect depth discontinuities. Multiple images captured with different illumination conditions provide additional information about a scene compared to conventional segmentation techniques. Shadows are used to identify true object edges and underlying particles. We applied the new approach in automated particle size analysis and evaluated it against the watershed and canny edge detection techniques. Evaluation results confirm that MFI can be applied in image segmentation and reveals the superiority of the …
Towards Efficient Planning For Real World Partially Observable Domains, Pradeep R. Varakantham
Towards Efficient Planning For Real World Partially Observable Domains, Pradeep R. Varakantham
Research Collection School Of Computing and Information Systems
My research goal is to build large-scale intelligent systems (both single- and multi-agent) that reason with uncertainty in complex, real-world environments. I foresee an integration of such systems in many critical facets of human life ranging from intelligent assistants in hospitals to offices, from rescue agents in large scale disaster response to sensor agents tracking weather phenomena in earth observing sensor webs, and others. In my thesis, I have taken steps towards achieving this goal in the context of systems that operate in partially observable domains that also have transitional (non-deterministic outcomes to actions) uncertainty. Given this uncertainty, Partially Observable …
Clustering And Combinatorial Optimization In Recursive Supervised Learning, Kiruthika Ramanathan, Sheng Uei Guan
Clustering And Combinatorial Optimization In Recursive Supervised Learning, Kiruthika Ramanathan, Sheng Uei Guan
Research Collection School Of Computing and Information Systems
The use of combinations of weak learners to learn a dataset has been shown to be better than the use of a single strong learner. In fact, the idea is so successful that boosting, an algorithm combining several weak learners for supervised learning, has been considered to be the best off the shelf classifier. However, some problems still exist, including determining the optimal number of weak learners and the over fitting of data. In an earlier work, we developed the RPHP algorithm which solves both these problems by using a combination of global search, weak learning and pattern distribution. In …
Mining Generalized Associations Of Semantic Relations From Textual Web Content, Tao Jiang, Ah-Hwee Tan, We Wang
Mining Generalized Associations Of Semantic Relations From Textual Web Content, Tao Jiang, Ah-Hwee Tan, We Wang
Research Collection School Of Computing and Information Systems
Traditional text mining techniques transform free text into flat bags of words representation, which does not preserve sufficient semantics for the purpose of knowledge discovery. In this paper, we present a two-step procedure to mine generalized associations of semantic relations conveyed by the textual content of Web documents. First, RDF (resource description framework) metadata representing semantic relations are extracted from raw text using a myriad of natural language processing techniques. The relation extraction process also creates a term taxonomy in the form of a sense hierarchy inferred from WordNet. Then, a novel generalized association pattern mining algorithm (GP-Close) is applied …
Perceived Cultural Importance And Actual Self-Importance Of Values In Cultural Identification, Ching Wan, Chi-Yue Chiu, Kim-Pong Tam, Sau-Lai Lee, Ivy Yee-Man Lau, Siqing Peng
Perceived Cultural Importance And Actual Self-Importance Of Values In Cultural Identification, Ching Wan, Chi-Yue Chiu, Kim-Pong Tam, Sau-Lai Lee, Ivy Yee-Man Lau, Siqing Peng
Research Collection School of Social Sciences
Cross-cultural psychologists assume that core cultural values define to a large extent what a culture is. Typically, core values are identified through an actual self-importance approach, in which core values are those that members of the culture as a group strongly endorse. In this article, the authors propose a perceived cultural importance approach to identifying core values, in which core values are values that members of the culture as a group generally believe to be important in the culture. In 5 studies, the authors examine the utility of the perceived cultural importance approach. Results consistently showed that, compared with values …
Terrorism And Relative Justice, Mark Findlay
Terrorism And Relative Justice, Mark Findlay
Research Collection Yong Pung How School Of Law
Terrorist violence and violent justice responses have much in common. While contextually dependant, both forms of violence lay claim to contested legitimacies. The relationships between terrorism and justice responses require both theoretical and empirical examination if the prospects for controlling the violence they perpetrate is to be sharpened.
Two New Lessons From Asian Miracles, Hing-Man Leung
Two New Lessons From Asian Miracles, Hing-Man Leung
Research Collection School Of Economics
Four Asian economies – Hong Kong, Singapore, Korea and Taiwan – have grown at spectacular speeds adopting different strategies. Past debates focused on their growth takeoff. The present paper studies their future outlook. As an economy matures, sustaining economic performance requires innovation and technology upgrading. Hong Kong, under a minimalist administration, is now critically deficient in technology. Singapore, dependent on foreign multinationals, is struggling to become a creator and not just a user of technology. We seek to explain why Hong Kong and Singapore are so much less innovative than Korea and Taiwan.
Lecture Video Enhancement And Editing By Integrating Posture, Gesture, And Text, Feng Wang, Chong-Wah Ngo, Ting-Chuen Pong
Lecture Video Enhancement And Editing By Integrating Posture, Gesture, And Text, Feng Wang, Chong-Wah Ngo, Ting-Chuen Pong
Research Collection School Of Computing and Information Systems
This paper describes a novel framework for automatic lecture video editing by gesture, posture, and video text recognition. In content analysis, the trajectory of hand movement is tracked and the intentional gestures are automatically extracted for recognition. In addition, head pose is estimated through overcoming the difficulties due to the complex lighting conditions in classrooms. The aim of recognition is to characterize the flow of lecturing with a series of regional focuses depicted by human postures and gestures. The regions of interest (ROIs) in videos are semantically structured with text recognition and the aid of external documents. By tracing the …
Moving-Object Detection, Association, And Selection In Home Videos, Zailiang Pan, Chong-Wah Ngo
Moving-Object Detection, Association, And Selection In Home Videos, Zailiang Pan, Chong-Wah Ngo
Research Collection School Of Computing and Information Systems
Due to the prevalence of digital video camcorders, home videos have become an important part of life-logs of personal experiences. To enable efficient video parsing, a critical step is to automatically extract objects, events and scene characteristics present in videos. This paper addresses the problem of extracting objects from home videos. Automatic detection of objects is a classical yet difficult vision problem, particularly for videos with complex scenes and unrestricted domains. Compared with edited and surveillant videos, home videos captured in uncontrolled environment are usually coupled with several notable features such as shaking artifacts, irregular motions, and arbitrary settings. These …
In Defence Of The Supreme Court: A Conservative View, Shubhankar Dam
In Defence Of The Supreme Court: A Conservative View, Shubhankar Dam
Research Collection Yong Pung How School Of Law
No abstract provided.
For Estee Lauder's Thia Breen, A Successful Career Is Made Up Of 'People, Passion And Performance', Knowledge@Smu
For Estee Lauder's Thia Breen, A Successful Career Is Made Up Of 'People, Passion And Performance', Knowledge@Smu
Knowledge@SMU
In her keynote address at the 28th Annual Wharton Women in Business Conference in Philadelphia, Thia Breen, president of Estee Lauder Americas and head of Global Business Development, told the audience that she was nearly fired from her first job. "That was the moment I started to understand: I am totally responsible for my own success," said Breen, whose first job out of college was unloading shipments of toys at Marshall Fields.
Temporal Aggregation And Risk-Return Relation, Jin Xing, Leping Wang, Jun Yu
Temporal Aggregation And Risk-Return Relation, Jin Xing, Leping Wang, Jun Yu
Research Collection School Of Economics
The function form of a linear intertemporal relation between risk and return is suggested by Merton's [1973. Econometrica 41, 867–887] analytical work for instantaneous returns, whereas empirical studies have examined the nature of this relation using temporally aggregated data, i.e., daily, monthly, quarterly, or even yearly returns. Our paper carefully examines the temporal aggregation effect on the validity of the linear specification of the risk–return relation at discrete horizons, and on its implications on the reliability of the resulting inference about the risk–return relation based on different observation intervals. Surprisingly, we show that, based on the standard Heston's [1993. Review …
Leadership In Knowledge Sharing: Creating Value Through Collaboration, Thomas Menkhoff, Yue Wah Chay, Hans-Dieter Evers, Benjamin Loh
Leadership In Knowledge Sharing: Creating Value Through Collaboration, Thomas Menkhoff, Yue Wah Chay, Hans-Dieter Evers, Benjamin Loh
Research Collection Lee Kong Chian School Of Business
This study aims to understand the antecedents of knowledge sharing behavior amongst tenant firms in Science and Technology Parks (STPs) which has been highlighted as a key factor for the development of an epistemic culture of innovation in STPs. Components of a model of knowledge management leadership with a focus on knowledge sharing and innovative value creation in STPs are developed inspired by the work of Nonaka, Nahapiet and Ghoshal, Guns and others. Collection of data on various relevant measures is ongoing, covering technology firms and STPs in Singapore and other Asian countries. Besides outlining model components and hypotheses, tentative …
Developing Leadership Talent: A Guide To Succession Planning And Leadership Development: Guidelines For Effective Talent Management, David Vaughan Day
Developing Leadership Talent: A Guide To Succession Planning And Leadership Development: Guidelines For Effective Talent Management, David Vaughan Day
Research Collection Lee Kong Chian School Of Business
No abstract provided.
Towards A Holistic Framework In Fostering Spirituality At Work, Gilbert Tan
Towards A Holistic Framework In Fostering Spirituality At Work, Gilbert Tan
Research Collection Lee Kong Chian School Of Business
Management theories are shaped by the assumptions of man. The Scientific and Administrative School of Thoughts adopt a mechanistic view of human. The Human Relations School views humans as social beings. Spirituality at work looks at the spiritual side of the organization and views an as a spiritual being. This paper proposes a holistic framework to spirituality at work. Taking a systems approach the framework discusses how training, cultural and structural interventions directed the four sub-systems of the organization, namely, culture, leadership, structure and people, help to promote spirituality at work. The framework also discusses the organizational and individual outcomes …
Bundling Information Goods: The Case Of E-Journals, Yong Tan
Bundling Information Goods: The Case Of E-Journals, Yong Tan
Dissertations and Theses Collection (Open Access)
With the development of the Internet, e-business has become popular. Increasingly, e-journals are being sold via the Internet. E- journals have two main characteristics: one is the low marginal cost associated with access; the other is the large number of items. For the commercially motivated seller, the issue of bundling a large number of low marginal cost items so as to maximize profits needs to be dealt with. In this thesis, a solution by way of an intermediate bundle is proposed. It is found that the profit obtained under the proposed procedure is 4% to 5% higher than that under …
Regional Trade Agreements Revisited, Hui Chin Tan
Regional Trade Agreements Revisited, Hui Chin Tan
Dissertations and Theses Collection (Open Access)
The gravity model is a workhorse for econometric studies of the impact of regional trade agreements (RTAs). Despite its initial lack of theoretical basis, the model has been successfully derived from various trade theories. The latest theoretical derivation by Anderson and van Wincoop (2003) reveals that prior gravity studies have made the critical error of omitting the multilateral resistance variable, which results in biased estimates. Other recent studies have highlighted empirical issues with the commonly used procedure of log-linearizing the gravity model and estimating the parameters using Ordinary Least Squares (OLS) regression. Silva and Tenreyro (2006) point out that this …
Moore's Paradoxes And Iterated Belief, John N. Williams
Moore's Paradoxes And Iterated Belief, John N. Williams
Research Collection School of Social Sciences
I give an account of the absurdity of Moorean beliefs of the omissive form (om) p and I don’t believe that p, and the commissive form (com) p and I believe that not-p, from which I extract a definition of Moorean absurdity. I then argue for an account of the absurdity of Moorean assertion. After neutralizing two objections to my whole account, I show that Roy Sorensen’s own account of the absurdity of his ‘iterated cases’ (om1) p and I don’t believe that I believe that p, and (com1) p and I believe that I believe that not-p, is unsatisfactory. …