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Articles 7441 - 7470 of 8681
Full-Text Articles in Entire DC Network
Overview Of The Imageclef 2007 Object Retrieval Task, Thomas Deselaers, Steven C. H. Hoi
Overview Of The Imageclef 2007 Object Retrieval Task, Thomas Deselaers, Steven C. H. Hoi
Research Collection School Of Computing and Information Systems
We describe the object retrieval task of ImageCLEF 2007, give an overview of the methods of the participating groups, and present and discuss the results. The task was based on the widely used PASCAL object recognition data to train object recognition methods and on the IAPR TC-12 benchmark dataset from which images of objects of the ten different classes bicycles, buses, cars, motorbikes, cats, cows, dogs, horses, sheep, and persons had to be retrieved. Seven international groups participated using a wide variety of methods. The results of the evaluation show that the task was very challenging and that different methods …
Grist For The Sceptic's Mill: Rwanda And The African Peer Review Mechanism, Eduard Jordaan
Grist For The Sceptic's Mill: Rwanda And The African Peer Review Mechanism, Eduard Jordaan
Research Collection School of Social Sciences
The article delves into the impact of the African Peer Review Mechanism (APRM) to Rwanda's achievement of greater democracy and respect for political freedom. It aims to show the improbability that the APRM can influence the country due to its insufficient ability and volition to pressure further democratization and respect for political rights on Rwandan government, the APRM's optimistic view of political governance, and the APR Heads of State Forum's ratification of a program of action discounting the issues of democracy and political freedom. The author stresses that the weaknesses of APRM may be attributed to the existing reduced authorization …
Are Us Family Firms Subject To Agency Problems? Evidence From Ceo Turnover And Firm Valuation, Xia Chen, Zhonglan Dai
Are Us Family Firms Subject To Agency Problems? Evidence From Ceo Turnover And Firm Valuation, Xia Chen, Zhonglan Dai
Research Collection School Of Accountancy
This paper investigates the impact of the founding family's presence in US public firms on the extent of agency problems related to CEO turnover decisions and on firm valuations after poor performance. In particular, we focus on three types of US public firms: family CEO firms, professional CEO family firms (family firms managed by a hired CEO outside the founding family), and non-family firms. We hypothesize that, the agency problem arising from the expropriation of small shareholders by large shareholders in family CEO firms and the agency problem arising from the separation of ownership and control in non-family firms, lead …
Employee Screening: Theory And Evidence, Fali Huang, Peter Cappelli
Employee Screening: Theory And Evidence, Fali Huang, Peter Cappelli
Research Collection School Of Economics
Arguably the fundamental problem faced by employers is how to elicit effort from employees. Most models suggest that employers meet this challenge by monitoring employees carefully to prevent shirking. But there is another option that relies on heterogeneity across employees, and that is to screen job candidates to find workers with a stronger work ethic who require less monitoring. This should be especially useful in work systems where monitoring by supervisors is more difficult, such as teamwork systems. We analyze the relationship between screening and monitoring in the context of a principal-agent model and test the theoretical results using a …
The Wto Trade Effect, Pao Li Chang, Myoung-Jae Lee
The Wto Trade Effect, Pao Li Chang, Myoung-Jae Lee
Research Collection School Of Economics
Rose (2004) showed that the WTO or its predecessor, the GATT, did not promote trade, based on conventional econometric analysis of gravity-type equations of trade. We argue that conclusions regarding the GATT/WTO trade effect based on gravity-type equations are arbitrary and subject to parametric misspecifications. We propose using nonparametric matching methods to estimate the 'treatment effect' of GATT/WTO membership, and permutation-based inferential procedures for assessing statistical significance of the estimated effects. A sensitivity analysis following Rosenbaum (2002) is then used to evaluate the sensitivity of our estimation results to potential selection biases. Contrary to Rose (2004), we find the effect …
A Hybrid Approach To Case Teaching, Swee Liang Tan, Roy Jin Hou Ng
A Hybrid Approach To Case Teaching, Swee Liang Tan, Roy Jin Hou Ng
Research Collection School Of Economics
We structure case based teaching using a combination of computer-support technology and in-class activities. We create and design an on-line learning tool, Case Study On-line (CSOL) that enables instructor to structure the delivery of teaching resources and set up assignment tasks in the system. The tool enables tasks to be set in a way that they can be completed sequentially, and learning resources can be accessed only when required by students. Upon submission of their assignments, students can promptly receive instructor’s explanations to the tasks. Follow up activities take place in class, with the objective to promote active learning. The …
Building Social Trust: A Human Capital Approach, Fali Huang
Building Social Trust: A Human Capital Approach, Fali Huang
Research Collection School Of Economics
Much evidence suggests individuals differ in their predisposition to cooperate, which is essentially a component of human capital. This paper examines the role of individual cooperative tendencies and their interactions with institutions in generating social trust; it also endogenizes cooperative tendencies using a human-capital investment model. Multiple equilibria and inefficiencies exist due to positive externalities. An innovative finding is that, when institutions are more effective in punishing defecting behaviors, more people invest in cooperative tendencies and hence the endogenous social trust is higher, though the equilibrium cooperative tendencies are lower. This paper provides a plausible explanation for many empirical and …
On The Segmentation Of Markets, Nicolas Laurent Jacquet, Serene Tan
On The Segmentation Of Markets, Nicolas Laurent Jacquet, Serene Tan
Research Collection School Of Economics
This paper endogenizes the market structure of an economy with heterogeneous agents who want to form bilateral matches in the presence of search frictions and when utility is nontransferable. There exist infinitely many marketplaces, and each agent chooses which marketplace to be in: agents get to choose not only whom to match with but also whom they meet with. Perfect segmentation is obtained in equilibrium, where agents match with the first person they meet. All equilibria have the same matching pattern. Although perfect assortative matching is not obtained in equilibrium, the degree of assortativeness is greater than in standard models.
Improved Maximum-Likelihood Estimation For The Common Shape Parameter Of Several Weibull Populations, Zhenlin Yang, Dennis K. J. Lin
Improved Maximum-Likelihood Estimation For The Common Shape Parameter Of Several Weibull Populations, Zhenlin Yang, Dennis K. J. Lin
Research Collection School Of Economics
The biasness problem of the maximum-likelihood estimate (MLE) of the common shape parameter of several Weibull populations is examined in detail. A modified MLE (MMLE) approach is proposed. In the case of complete and Type II censored data, the bias of the MLE can be substantial. This is noticeable even when the sample size is large. Such a bias increases rapidly as the degree of censorship increases and as more populations are involved. The proposed MMLE, however, is nearly unbiased and much more efficient than the MLE, irrespective of the degree of censorship, the sample sizes, and the number of …
Forecasting The Car Penetration Rate (Cpr) In China: A Nonparametric Approach, Sainan Jin, Liangjun Su
Forecasting The Car Penetration Rate (Cpr) In China: A Nonparametric Approach, Sainan Jin, Liangjun Su
Research Collection School Of Economics
With strong economic growth, the auto industry has made great breakthroughs in recent years and has become a backbone industry in China, while cars play an increasingly important role, and are now the principal part of the auto industry. Both China's government and academic circles take strong interest in the prediction of CPR (i.e. car penetration rate or cars per thousand people), which will be the main guidance for the future industry policy. We summarize the existing problems in recent research and propose to use nonparametric methods to estimate the CPR and its elasticity with respect to GDP per capita …
Cross-Language And Cross-Media Image Retrieval: An Empirical Study At Imageclef2007, Steven C. H. Hoi
Cross-Language And Cross-Media Image Retrieval: An Empirical Study At Imageclef2007, Steven C. H. Hoi
Research Collection School Of Computing and Information Systems
This paper summarizes our empirical study of cross-language and cross-media image retrieval at the CLEF image retrieval track (ImageCLEF2007). In this year, we participated in the ImageCLEF photo retrieval task, in which the goal of the retrieval task is to search natural photos by some query with both textual and visual information. In this paper, we study the empirical evaluations of our solutions for the image retrieval tasks in three aspects. First of all, we study the application of language models and smoothing strategies for text-based image retrieval, particularly addressing the short text query issue. Secondly, we study the cross-media …
Novelty Detection For Cross-Lingual News Stories With Visual Duplicates And Speech Transcripts, Xiao Wu, Alexander G. Hauptmann, Chong-Wah Ngo
Novelty Detection For Cross-Lingual News Stories With Visual Duplicates And Speech Transcripts, Xiao Wu, Alexander G. Hauptmann, Chong-Wah Ngo
Research Collection School Of Computing and Information Systems
An overwhelming volume of news videos from different channels and languages is available today, which demands automatic management of this abundant information. To effectively search, retrieve, browse and track cross-lingual news stories, a news story similarity measure plays a critical role in assessing the novelty and redundancy among them. In this paper, we explore the novelty and redundancy detection with visual duplicates and speech transcripts for cross-lingual news stories. News stories are represented by a sequence of keyframes in the visual track and a set of words extracted from speech transcript in the audio track. A major difference to pure …
Context-Based Detection Of Clone-Related Bugs, Lingxiao Jiang, Zhendong Su, Edwin Chiu
Context-Based Detection Of Clone-Related Bugs, Lingxiao Jiang, Zhendong Su, Edwin Chiu
Research Collection School Of Computing and Information Systems
Studies show that programs contain much similar code, commonly known as clones. One of the main reasons for introducing clones is programmers' tendency to copy and paste code to quickly duplicate functionality. We commonly believe that clones can make programs difficult to maintain and introduce subtle bugs. Although much research has proposed techniques for detecting and removing clones to improve software maintainability, little has considered how to detect latent bugs introduced by clones. In this paper, we introduce a general notion of context-based inconsistencies among clones and develop an efficient algorithm to detect such inconsistencies for locating bugs. We have …
Taking Stock Of The Creative Commons Experiment: Monitoring The Use Of Creative Commons Licenses And Evaluating Its Implications For The Future Of Creative Commons And For Copyright Law, Giorgos Cheliotis, Kam Wai, Warren Bartholomew Chik, Ankit Guglani, Giri Kumar Tayi
Taking Stock Of The Creative Commons Experiment: Monitoring The Use Of Creative Commons Licenses And Evaluating Its Implications For The Future Of Creative Commons And For Copyright Law, Giorgos Cheliotis, Kam Wai, Warren Bartholomew Chik, Ankit Guglani, Giri Kumar Tayi
Research Collection School Of Computing and Information Systems
We provide an analysis of the use of Creative Commons (CC) licenses, an approach to licensing creative works which has become very popular among authors who wish to promote more liberal sharing and use of their work. We provide data demonstrating the popularity of CC, examine which specific license types within the CC framework are most popular, and then identify contributing factors for the relative popularity of some of the license types.
Evaluating The Blending Of An E-Learning Module Into A Knowledge Management Course: A Case Study From The Singapore Management University (Smu), Thomas Menkhoff, Tze Yian Thang, Yue Kee Wong
Evaluating The Blending Of An E-Learning Module Into A Knowledge Management Course: A Case Study From The Singapore Management University (Smu), Thomas Menkhoff, Tze Yian Thang, Yue Kee Wong
Research Collection Lee Kong Chian School Of Business
In 2005, the authors of this essay led the development and launch of SMU’s (Singapore Management University) first e-learning package on ‘Knowledge Management’. The package is aimed at supporting SMU’s mission to be committed to an interactive, participative and technologically-enabled learning experience. Since its inception in 2000, SMU’s educational and administrative practices are modelled after American institutions, in particular the Wharton School of the University of Pennsylvania. To support SMU’s unique pedagogy, wireless technology for mobile computing is a central feature at SMU. Against this background, the paper features a self-critical and reflective case study of the roll out of …
Realizing Live Sequence Charts In System Verilog, Hai H. Wang, Shengchao Qin, Jun Sun, Jin Song Dong
Realizing Live Sequence Charts In System Verilog, Hai H. Wang, Shengchao Qin, Jun Sun, Jin Song Dong
Research Collection School Of Computing and Information Systems
The design of an embedded control system starts with an investigation of properties and behaviors of the process evolving within its environment, and an analysis of the requirement for its safety performance. In early stages, system requirements are often specied as scenarios of behavior using sequence charts for different use cases. This specication must be precise, intuitive and expressive enough to capture different aspects of embedded control systems. As a rather rich and useful extension to the classical message sequence charts, Live Sequence Charts (LSC), which provide a rich collection of constructs for specifying both possible and mandatory behaviors, are …
Protection For Sale Under Monopolistic Competition: An Empirical Investigation, Pao Li Chang
Protection For Sale Under Monopolistic Competition: An Empirical Investigation, Pao Li Chang
Research Collection School Of Economics
This paper proposes a general empirical framework to estimate the protection-for-sale model, where the protection regime shifts according to a sector's market structure (perfectly or monop-olistically competitive). We base the protection structure on Grossman and Helpman (1994) for the subset of perfectly competitive sectors and on Chang (2005) for the subset of monop- olistically competitive sectors. The two protection regimes are simultaneously estimated with joint constraints. The results of the J-test consistently reject the homogeneous (perfect compe- tition) protection-for-sale model often adopted in previous literature and suggest a direction of improvement toward the proposed heterogeneous protection structure model.
An Artificial Immune System Based Approach For English Grammar Correction, Akshat Kumar, Shivashankar B. Nair
An Artificial Immune System Based Approach For English Grammar Correction, Akshat Kumar, Shivashankar B. Nair
Research Collection School Of Computing and Information Systems
Grammar checking and correction comprise of the primary problems in the area of Natural Language Processing (NLP). Traditional approaches fall into two major categories: Rule based and Corpus based. While the former relies heavily on grammar rules the latter approach is statistical in nature. We provide a novel corpus based approach for grammar checking that uses the principles of an Artificial Immune System (AIS).We treat grammatical error as pathogens (in immunological terms) and build antibody detectors capable of detecting grammatical errors while allowing correct constructs to filter through. Our results show that it is possible to detect a range of …
Auditor Locality, Audit Quality And Audit Pricing, Jong-Hag Choi, Jeong-Bon Kim, Aini Qiu, Yoonseok Zang
Auditor Locality, Audit Quality And Audit Pricing, Jong-Hag Choi, Jeong-Bon Kim, Aini Qiu, Yoonseok Zang
Research Collection School Of Accountancy
No abstract provided.
A Genetic Algorithm For Cellular Manufacturing Design And Layout, Xiaodan Wu, Chao-Hsien Chu, Yunfeng Wang, Weili Yan
A Genetic Algorithm For Cellular Manufacturing Design And Layout, Xiaodan Wu, Chao-Hsien Chu, Yunfeng Wang, Weili Yan
Research Collection School Of Computing and Information Systems
Cellular manufacturing (CM) is an approach that can be used to enhance both flexibility and efficiency in today’s small-to-medium lot production environment. The design of a CM system (CMS) often involves three major decisions: cell formation, group layout, and group schedule. Ideally, these decisions should be addressed simultaneously in order to obtain the best results. However, due to the complexity and NP-complete nature of each decision and the limitations of traditional approaches, most researchers have only addressed these decisions sequentially or independently. In this study, a hierarchical genetic algorithm is developed to simultaneously form manufacturing cells and determine the group …
Near-Duplicate Keyframe Identification With Interest Point Matching And Pattern Learning, Wan-Lei Zhao, Chong-Wah Ngo, Hung-Khoon Tan, Xiao Wu
Near-Duplicate Keyframe Identification With Interest Point Matching And Pattern Learning, Wan-Lei Zhao, Chong-Wah Ngo, Hung-Khoon Tan, Xiao Wu
Research Collection School Of Computing and Information Systems
This paper proposes a new approach for near-duplicate keyframe (NDK) identification by matching, filtering and learning of local interest points (LIPs) with PCA-SIFT descriptors. The issues in matching reliability, filtering efficiency and learning flexibility are novelly exploited to delve into the potential of LIP-based retrieval and detection. In matching, we propose a one-to-one symmetric matching (OOS) algorithm which is found to be highly reliable for NDK identification, due to its capability in excluding false LIP matches compared with other matching strategies. For rapid filtering, we address two issues: speed efficiency and search effectiveness, to support OOS with a new index …
On The Segmentation Of Markets, Nicolas L. Jacquet, Serene Tan
On The Segmentation Of Markets, Nicolas L. Jacquet, Serene Tan
Research Collection School Of Economics
This paper endogenizes the market structure of an economy with heterogeneous agents who want to form bilateral matches in the presence of search frictions and when utility is nontransferable. There exist infinitely many marketplaces, and each agent chooses which marketplace to be in: agents get to choose not only whom to match with but also whom they meet with. Perfect segmentation is obtained in equilibrium, where agents match with the first person they meet. All equilibria have the same matching pattern. Although perfect assortative matching is not obtained in equilibrium, the degree of assortativeness is greater than in standard models.
Design Science Research On Systems Analysis And Design: The Case Of Uml, X. Tan, Keng Siau, J. Erickson
Design Science Research On Systems Analysis And Design: The Case Of Uml, X. Tan, Keng Siau, J. Erickson
Research Collection School Of Computing and Information Systems
Design science in the IS discipline seeks to create artifacts that embody the ideas, practices, technical capabilities, and products required to efficiently accomplish the analysis, design, implementation, and use of information systems (Hevner et al 2006). SA&D research, being close to the design science paradigm, has suffered from a lack of appreciation from the behavioral science paradigm. To provide a paradigmatic foundation, we propose a conceptual framework for SA&D research. The framewor was developed based on several essays that systematically articulate the design science paradigm in the IS field. Using this framework, we reviewed some UML papers that appeared in …
Coordination In Distributed Organizations, Kannan Srikanth
Coordination In Distributed Organizations, Kannan Srikanth
Research Collection Lee Kong Chian School Of Business
Innovative work performed in a distributed fashion does not easily lend to itself either of two classic coordination strategies - anticipatory planning or ongoing rich communication. We study how innovative work that is distributed across space and time is coordinated in global software service organizations. Our findings indicate that neither coordination by plan nor coordination by feedback play a dominant role in the coordination of distributed software services delivery. Instead, we find that the firms we studied coordinate action distributed work by relying on common ground. Common ground leads to coordinated action across locations by two means: the anticipation effect …
Managing Retirement Risk In An Ageing World: The Global Picture, Knowledge@Smu
Managing Retirement Risk In An Ageing World: The Global Picture, Knowledge@Smu
Knowledge@SMU
According to HSBC’s 2007 global retirement study, most retirees in their 60s and 70s are living healthy, happy and productive lives. However, as the world rapidly ages, most pre-retirees are surprisingly unconcerned about how they will cope in their retirement. In Part 1 of a 2-part article, Olivia Mitchell, Wharton professor of insurance and risk management, who is also a chaired professor at Singapore Management University, cautions that these people might be living with a false sense of security, and could face a rude awakening when it is too late to do anything about it.
The 'Big Think Strategy' For Creativity And Innovation: Bernd Schmitt's New Book, Knowledge@Smu
The 'Big Think Strategy' For Creativity And Innovation: Bernd Schmitt's New Book, Knowledge@Smu
Knowledge@SMU
Bernd Schmitt, professor of international business at Columbia Business School in New York, is a driving force behind the concept of customer experiential marketing. Schmitt, who also directs Columbia’s Center on Global Brand Leadership, has published six books on the subject, three of them co-authored, with translations in 16 languages. While on a visit to Singapore in June, Schmitt provided Knowledge@SMU with a sneak preview of his new book, Big Think Strategy: How to Leverage Bold Ideas and Leave Small Thinking Behind, to be published in December.
Preventing A Real Estate Bubble In Asia: Can Loan Securitisation Help?, Knowledge@Smu
Preventing A Real Estate Bubble In Asia: Can Loan Securitisation Help?, Knowledge@Smu
Knowledge@SMU
Real estate is among the most highly leveraged sectors of an economy, which makes it more likely than others to precipitate a financial crisis, as happened in some Asian countries in 1997-1998. At the recent East Asian Seminar on Economics (EASE) of the National Bureau of Economic Research (NBER), held at Singapore Management University, Richard Green, Roberto S. Mariano, Andrey Pavlov and Susan Wachter presented a joint paper suggesting that asset securitisation could help reduce such risks. --------------------------------------------------------------------------------
Multilevel Methods: Emergent Issues And Future Directions In Measurement, Longitudinal Analyses And Non-Normal Outcomes, Paul D. Bliese, David Chan, Robert E. Ployhart
Multilevel Methods: Emergent Issues And Future Directions In Measurement, Longitudinal Analyses And Non-Normal Outcomes, Paul D. Bliese, David Chan, Robert E. Ployhart
Research Collection School of Social Sciences
The study of multilevel phenomena in organizations involves a complex interplay between methods and statistics on one hand and theory development on the other. In this introduction, the authors provide a short summary of the five articles in this feature topic and use them as a platform to discuss the broad need for work in the two areas of (a) multilevel construct validation and measurement and (b) statistical advances in variance decomposition. Within these two broad frameworks, the authors specifically discuss, first, the need to continue moving beyond notions of isomorphism in developing and testing aggregate-level constructs. Second, they discuss …
Situational Judgment Tests In High-Stakes Settings: Issues And Strategies With Generating Alternate Forms, Filip Lievens, Paul R. Sackett
Situational Judgment Tests In High-Stakes Settings: Issues And Strategies With Generating Alternate Forms, Filip Lievens, Paul R. Sackett
Research Collection Lee Kong Chian School Of Business
This study used principles underlying item generation theory to posit competing perspectives about which features of situational judgment tests might enhance or impede consistent measurement across repeat test administrations. This led to 3 alternate-form development approaches (random assignment, incident isomorphism, and item isomorphism). The effects of these approaches on alternate-form consistency, mean score changes, and criterion-related validity were examined in a high-stakes context (N = 3,361). Generally, results revealed that even small changes in the context of the situations presented resulted in significantly lower alternate-form consistency. Conversely, placing more constraints on the alternate-form development process proved beneficial. The contributions, implications, …
Discovering And Exploiting Causal Dependencies For Robust Mobile Context-Aware Recommenders, Ghim-Eng Yap, Ah-Hwee Tan, Hwee Hwa Pang
Discovering And Exploiting Causal Dependencies For Robust Mobile Context-Aware Recommenders, Ghim-Eng Yap, Ah-Hwee Tan, Hwee Hwa Pang
Research Collection School Of Computing and Information Systems
Acquisition of context poses unique challenges to mobile context-aware recommender systems. The limited resources in these systems make minimizing their context acquisition a practical need, and the uncertainty in the mobile environment makes missing and erroneous context inputs a major concern. In this paper, we propose an approach based on Bayesian networks (BNs) for building recommender systems that minimize context acquisition. Our learning approach iteratively trims the BN-based context model until it contains only the minimal set of context parameters that are important to a user. In addition, we show that a two-tiered context model can effectively capture the causal …