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Articles 21541 - 21570 of 23193
Full-Text Articles in Entire DC Network
Port Yard Storage Optimization, Ping Chen, Zhaohui Fu, Andrew Lim, Brian Rodrigues
Port Yard Storage Optimization, Ping Chen, Zhaohui Fu, Andrew Lim, Brian Rodrigues
Research Collection Lee Kong Chian School Of Business
The port yard storage optimization problem (PYSOP) originates from space allocation needs at the Port of Singapore. Space allocated to cargo is to be minimized in a designated yard within a time interval. The problem is akin to a packing problem in space and time, but where shapes packed and constraints are particular to port operations. Further, space requests can change within the time interval in which it is requested. This basic problem is generic to port operations and may find applications elsewhere. The PYSOP is NP-hard, but we propose a number of metaheuristics. Extensive experiments were conducted and good …
The Demise Of Corrections Fifteen Years On: Any Hope For Progressive Punishment?, Mark Findlay
The Demise Of Corrections Fifteen Years On: Any Hope For Progressive Punishment?, Mark Findlay
Research Collection Yong Pung How School Of Law
A decade and a half ago I wrote an article entitled The Demise of Corrections (Findlay 1988). The central thesis was that penal correctionalism had failed because it was piecemeal and lacked the support of a well developed commitment to alternative strategies to the prison. The criticism is sharper in the current context of imprisonment in NSW where correctional expectations continue to disappoint (and be disappointed), despite a recent revival of interest in 'what works' offender management programmes.
Comparison Of Discrete Singular Convolution And Generalised Differential Quadrature For The Vibration Analysis Of Rectangular Plates, C. H. W. Ng, Yibao Zhao, G. W. Wei
Comparison Of Discrete Singular Convolution And Generalised Differential Quadrature For The Vibration Analysis Of Rectangular Plates, C. H. W. Ng, Yibao Zhao, G. W. Wei
Research Collection Lee Kong Chian School Of Business
This paper presents a comprehensive comparison study between the discrete singular convolution (DSC) and the well-known global method of generalized differential quadrature (GDQ) for vibration analysis so as to enhance the understanding of the DSC algorithm. The DSC method is implemented through Lagrange's delta sequence kernel (DSC-LK), which utilizes local Lagrange polynomials to calculate weighting coefficients, whereas, the GDQ requires global ones. Moreover, it is shown that the treatments of boundary conditions and the use of grid systems are different in the two methods. Comparison study is carried out on 21 rectangular plates of different combinations of simply supported (S), …
On Leverage In A Stochastic Volatility Model, Jun Yu
On Leverage In A Stochastic Volatility Model, Jun Yu
Research Collection School Of Economics
This paper is concerned with specification for modelling financial leverage effect in the context of stochastic volatility (SV) models. Two alternative specifications co-exist in the literature. One is the Euler approximation to the well known continuous time SV model with leverage effect and the other is the discrete time SV model of Jacquier, Polson and Rossi (2004, Journal of Econometrics, forthcoming). Using a Gaussian nonlinear state space form with uncorrelated measurement and transition errors, I show that it is easy to interpret the leverage effect in the conventional model whereas it is not clear how to obtain the leverage effect …
Parameter Inference Of Queueing Models For It Systems Using End-To-End Measurements, Laura Wynter, Cathy H. Xia, Fan Zhang
Parameter Inference Of Queueing Models For It Systems Using End-To-End Measurements, Laura Wynter, Cathy H. Xia, Fan Zhang
Research Collection School Of Computing and Information Systems
he scope of available applications, IT systems increase at a fascinating rate in both size and complexity. For example, today, a typical Web service hosting center may have hundreds of nodes and dozens of different applications simultaneously running on it. Each of the nodes in turn has often multiple processors and layered caches. These nodes make use of both local and shared storage systems. The size and complexity of such systems make performance modeling much more difficult, if at all tractable. Detailed modeling, fine tuning and accurate analysis can be carried out only on very small IT systems or very …
Know-How, John N. Williams
Know-How, John N. Williams
Research Collection School of Social Sciences
In daily life we not only speak not only of knowing facts but also of know-how. We may not only judge that someone knows that the stock market is in decline, that an avalanche is imminent or that ice is not marble but also that someone knows how to make money on the stock exchange, knows how to survive an avalanche or knows how to carve a realistic life-sized human figure from a block of marble. Ryle (1949, 26-60) first drew attention to analysis of know-how and argued that know-how does not consist of propositional knowledge. He went on to …
Cryptanalysis Of Two Anonymous Buyer-Seller Watermarking Protocols And An Improvement For True Anonymity, Bok-Min Goi, Raphael C. W. Phan, Yanjiang Yang, Feng Bao, Robert H. Deng, M. U. Siddiqi
Cryptanalysis Of Two Anonymous Buyer-Seller Watermarking Protocols And An Improvement For True Anonymity, Bok-Min Goi, Raphael C. W. Phan, Yanjiang Yang, Feng Bao, Robert H. Deng, M. U. Siddiqi
Research Collection School Of Computing and Information Systems
By combining techniques of watermarking and fingerprinting, a sound buyer-seller watermarking protocol can address the issue of copyright protection in e-commerce. In this paper, we analyze the security of two recent anonymous buyer-seller watermarking protocols proposed by Ju et. al and Choi et. al respectively, and prove that they do not provide the features and security as claimed. In particular, we show that i) the commutative cryptosystem used in Choi et. als protocol fails to prevent the watermark certification authority (WCA) from discovering the watermark (fingerprint) chosen by the buyer; ii) for both protocols, the seller can discover the watermark …
The Complexity Of Uml: Differentiating Practical And Theoretical Complexity, J. Erickson, Keng Siau
The Complexity Of Uml: Differentiating Practical And Theoretical Complexity, J. Erickson, Keng Siau
Research Collection School Of Computing and Information Systems
UML (Unified Modeling Language) has been criticized for its complexity, relating to users, and those learning to use it. Using Rossi and Brinkkemper’s [9] complexity metrics, Siau and Cao [10] completed a complexity analysis of UML and 36 other modeling techniques, finding that UML is indeed more complex than other techniques. Siau, Erickson and Lee [11] argued that Rossi and Brinkkemper’s metrics present the theoretical maximum complexity, as opposed to a practitioner-based complexity, that must be less than the theoretical maximum. The current research proposes that a subset of UML (a kernel) composed of the most commonly used constructs, would …
Proprietary And Open Systems Adoption In E-Procurement: A Risk-Augmented Transactions Cost Perspective, Robert J. Kauffman, Hamid Mohtadi
Proprietary And Open Systems Adoption In E-Procurement: A Risk-Augmented Transactions Cost Perspective, Robert J. Kauffman, Hamid Mohtadi
Research Collection School Of Computing and Information Systems
We present an economic model that enables the study of incentives for business-to-business (B2B) e-procurement systems investments that permit inventory coordination and improved operational control. We focus on the information technology adoption behavior of firms in the presence of transaction costs, agency costs and information uncertainty. We conclude that it is appropriate to rethink the prior theory and develop an extended transaction-cost theory perspective that incorporates the possibility of shocks. We distinguish among three kinds of B2B e-procurement systems platforms. Proprietary platform procurement systems involve traditional electronic data interchange (EDI) technologies. Open platform procurement systems are associated with e-market Web …
Intelligence Strategy: The Evolution And Co-Evolution Dynamics Of Intelligent Human Organizations And Their Interacting Agents, Thow Yick Liang
Intelligence Strategy: The Evolution And Co-Evolution Dynamics Of Intelligent Human Organizations And Their Interacting Agents, Thow Yick Liang
Research Collection Lee Kong Chian School Of Business
In the knowledge economy, the human minds are the most vital center of analysis. They are the complex adaptive systems capable of processing information, establishing knowledge structure, conceptualizing idea, and making decision. The intrinsic intelligence of the individual minds, as well as the organizational/ collective intelligence, drives the dynamic of all human systems. Primarily, the local self-enrichment processes of the interacting agents are autopoietic. In addition, global forces are also present in all human organizations. The global forces are constructive only if they support the elementary processes. The global forces originate from the orgmind of the organization. A complex relationship …
Stripping To The Undercoat: A Review And Reflections On A Piece Of Organization Theatre, Timothy Adrian Robert Clark, Iain Mangham
Stripping To The Undercoat: A Review And Reflections On A Piece Of Organization Theatre, Timothy Adrian Robert Clark, Iain Mangham
Research Collection Lee Kong Chian School Of Business
In this article, we review one 'tailor-made play', one piece of organization theatre called Varnishing the Truth. We then reflect on the questions we asked of ourselves while watching this performance and reviewing the video of it: how does this activity relate to its claimed theoretical foundations (Boal's forum theatre)? Is forum theatre an appropriate model for organization theatre? Can 'things be made to move' by an activity such as the one to which we were an audience? In the process of answering these questions, we emphasize the reductive adoption of radical techniques (that is, Boal's forum theatre); the depoliticization …
Furthering The Understanding Of Practical Complexity: Identifying A Kernel Of Uml, J. Erickson, Keng Siau
Furthering The Understanding Of Practical Complexity: Identifying A Kernel Of Uml, J. Erickson, Keng Siau
Research Collection School Of Computing and Information Systems
The Unified Modeling Language (UML) was adopted by the Object Management Group as the standard visual modeling language for OO systems development. However, UML has been criticized in the literature for its complexity, inconsistent semantics, and ambiguous constructs. A set of complexity indices for UML in aggregate, and the nine diagramming techniques individually, was compiled recently. Since this set of metrics is based on inclusion of all possible constructs in UML, it thus provides an indication of the theoretical (maximum) complexity of the modeling methods. This paper contends that in practice, developers do not use all of the possible diagrams …
The Case For Clumsiness, Michael Thompson, Marco Verweij
The Case For Clumsiness, Michael Thompson, Marco Verweij
Research Collection School of Social Sciences
Most climatologists agree that by burning fossil fuels and engaging in other forms of consumption and production we are increasing the amount of greenhouse gases that float around in the atmosphere. These gases, in trapping some of the sun’s heat, warm the earth and enable life. The trouble is, some predict, that if we continue to accumulate those gases, over the course of the new century the average temperature on earth will rise and local climates will change, with possibly catastrophic consequences. Will this indeed happen? If so, should we do something about it? And if yes, what and when? …
Expectations Formation And Forecasting Of Vehicle Demand: An Empirical Study Of The Vehicle Quota Auctions In Singapore, Sing-Fat Chu, Winston T. H. Koh, Yiu Kuen Tse
Expectations Formation And Forecasting Of Vehicle Demand: An Empirical Study Of The Vehicle Quota Auctions In Singapore, Sing-Fat Chu, Winston T. H. Koh, Yiu Kuen Tse
Research Collection School Of Economics
This paper studies the expectations formation and forecasting of vehicle demand in Singapore under the vehicle quota system. Under the system, a car buyer must first bid for a vehicle license in monthly auctions in order to purchase a new car. We construct an econometric model to test the hypothesis that past bid distributions of the license auctions contain information that car buyers can use to update their expectations about the intensity of market demand, forecast the license premiums and formulate their bidding strategies in future auctions. Our empirical analysis indicates that past bid distributions have a good degree of …
Multiple Testing To Establish Superiority/Equivalence Of A New Treatment Compared With K Standard Treatments For Unbalanced Designs, Koon Shing Kwong, Siu Hung Cheung, Wai-Sum Chan
Multiple Testing To Establish Superiority/Equivalence Of A New Treatment Compared With K Standard Treatments For Unbalanced Designs, Koon Shing Kwong, Siu Hung Cheung, Wai-Sum Chan
Research Collection School Of Economics
In clinical studies, multiple superiority/equivalence testing procedures can be applied to classify a new treatment as superior, equivalent (same therapeutic effect), or inferior to each set of standard treatments. Previous stepwise approaches (Dunnett and Tamhane, 1997, Statistics in Medicine 16, 2489–2506; Kwong, 2001, Journal of Statistical Planning and Inference 97, 359–366) are only appropriate for balanced designs. Unfortunately, the construction of similar tests for unbalanced designs is far more complex, with two major difficulties: (i) the ordering of test statistics for superiority may not be the same as the ordering of test statistics for equivalence; and (ii) the correlation structure …
Expectations Formation And Forecasting Of Vehicle Demand: An Empirical Study Of The Vehicle Quota Auctions In Singapore, Sing-Fat Chu, Winston T. H. Koh, Yiu Kuen Tse
Expectations Formation And Forecasting Of Vehicle Demand: An Empirical Study Of The Vehicle Quota Auctions In Singapore, Sing-Fat Chu, Winston T. H. Koh, Yiu Kuen Tse
Research Collection School Of Economics
This paper studies expectations formation and forecasting of vehicle demand in Singapore under the vehicle quota system. Under the system, a car buyer must first bid for a vehicle license in monthly auctions in order to purchase a new car. We construct an econometric model to test the hypothesis that past bid distributions of the license auctions contain information that car buyers can use to update their expectations about the intensity of market demand, forecast license premiums and formulate their bidding strategies in future auctions. Our empirical analysis indicates that past bid distributions have a good degree of predictive power …
Steganographic Schemes For File System And B-Tree, Hwee Hwa Pang, Kian-Lee Tan, Xuan Zhou
Steganographic Schemes For File System And B-Tree, Hwee Hwa Pang, Kian-Lee Tan, Xuan Zhou
Research Collection School Of Computing and Information Systems
While user access control and encryption can protect valuable data from passive observers, these techniques leave visible ciphertexts that are likely to alert an active adversary to the existence of the data. We introduce StegFD, a steganographic file driver that securely hides user-selected files in a file system so that, without the corresponding access keys, an attacker would not be able to deduce their existence. Unlike other steganographic schemes proposed previously, our construction satisfies the prerequisites of a practical file system in ensuring the integrity of the files and maintaining efficient space utilization. We also propose two schemes for implementing …
A Rate-Distortion Framework For Information-Theoretic Mobility Management, Abhishek Roy, Archan Misra, Sajal K. Das
A Rate-Distortion Framework For Information-Theoretic Mobility Management, Abhishek Roy, Archan Misra, Sajal K. Das
Research Collection School Of Computing and Information Systems
A practical information theoretic framework is developed for studying the optimal tradeoff between location update and paging costs in cellular networks. The framework envisions the quantization of location information into a registration area (RA) level granularity, followed by the use of an entropy-coding technique to decrease the location update rate. The rate distortion theory of the lossy quantization is identified as an appropriate measure for capturing the optimal tradeoff between a mobile's update rate and its location uncertainty. Based on LZ-78 compression, two different RA-level location update algorithms (RA-LeZi and LeZi-RA) have been developed, both of which asymptotically approach this …
Tournament Versus Fitness Uniform Selection, Shane Legg, Marcus Hutter, Akshat Kumar
Tournament Versus Fitness Uniform Selection, Shane Legg, Marcus Hutter, Akshat Kumar
Research Collection School Of Computing and Information Systems
In evolutionary algorithms a critical parameter that must be tuned is that of selection pressure. If it is set too low then the rate of convergence towards the optimum is likely to be slow. Alternatively if the selection pressure is set too high the system is likely to become stuck in a local optimum due to a loss of diversity in the population. The recent Fitness Uniform Selection Scheme (FUSS) is a conceptually simple but somewhat radical approach to addressing this problem - rather than biasing the selection towards higher fitness, FUSS biases selection towards sparsely populated fitness levels. In …
Integrating Business Opportunities In An Emerging Asian Economy: Perspectives From Singapore's Gambit In Vietnam, Ai Lin Leong, David David, Caroline Yeoh
Integrating Business Opportunities In An Emerging Asian Economy: Perspectives From Singapore's Gambit In Vietnam, Ai Lin Leong, David David, Caroline Yeoh
Research Collection Lee Kong Chian School Of Business
To date, Singapore’s regionalization strategy has been applied in China, India, Indonesia and Vietnam through the establishment of industrial parks. The nexus between these ‘clones’ is the implantation of Singapore’s positive business ethos amidst more uncertain host environments. Leveraging on world-class infrastructure, efficiency and location-specific advantages, these industrial parks present themselves as low-cost investment enclaves. This paper focuses on the regional industrial development project assembled, administered and promoted by the sovereign national governments of Singapore and Vietnam. Using in-depth case studies, it examines the push-pull factors for firms with different structures. It finds that progress in this privileged foreign investment …
Production And Political Economy In The Animation Industry: Why Insourcing And Outsourcing Occur, Feichin, Ted Tschang, Andrea Goldstein
Production And Political Economy In The Animation Industry: Why Insourcing And Outsourcing Occur, Feichin, Ted Tschang, Andrea Goldstein
Research Collection Lee Kong Chian School Of Business
This paper presents a framework for explaining production patterns in creative industries. In particular, we focus on the conditions under which insourcing occurs in the US threedimensional animation industry and where outsourcing in the conventional two-dimensional animation industry occurs to the Philippines. The work that is outsourced is not the most creative component of the entire production process. Institutional decisions (as related to the location of decision makers and primary markets), and business conditions in the world market, have both positively and negatively affected the local Filipino industry and its position within the global division of labor. Implications for knowledge-based …
The Singapore "Advantage" In India: A Perception Or A Premium?, Alexandra Si-Lan Wee, Ai Lin Leong, Caroline Yeoh
The Singapore "Advantage" In India: A Perception Or A Premium?, Alexandra Si-Lan Wee, Ai Lin Leong, Caroline Yeoh
Research Collection Lee Kong Chian School Of Business
Singapore’s regionalisation strategy has been applied in various countries, such as China, Vietnam and India, through the establishment of industrial parks. The parks are marketed as a winning combination of the host country’s unique location advantages and Singapore style efficiency and management know-how. Singapore’s foray into India was marked by the setting up of the ITPL in Bangalore, and furthered by its venture into a future phase of HITEC City, based on her success in Bangalore. However, with global businesses shifting interests towards India, and competing industrial parks emerging to meet the increasing demand, ITPL is faced with stiff competition …
Extending Economic Space: Some Empirics On Singapore's Gambit In Bangalore And Hyderabad, India, Kevin Wongso, Caroline Yeoh, Lu Gao
Extending Economic Space: Some Empirics On Singapore's Gambit In Bangalore And Hyderabad, India, Kevin Wongso, Caroline Yeoh, Lu Gao
Research Collection Lee Kong Chian School Of Business
No abstract provided.
Integrating Product Platform Development With Supply Chain Configuration In A Global Environment, Soumen Ghosh, Nagesh Murthy, Byung Joon Park
Integrating Product Platform Development With Supply Chain Configuration In A Global Environment, Soumen Ghosh, Nagesh Murthy, Byung Joon Park
Research Collection Lee Kong Chian School Of Business
In this research, we have investigated the interaction between product platform development and supply chain configuration in a global environment. A comprehensive decision support model has been developed to simultaneously determine product strategy and supply chain configuration. By Products we refer to the bundle of module option alternatives offered to market segments, and product platform development is a means of looking for the opportunity of sharing module option alternatives among products. A scenario analysis has been performed to gain insights on how platform development is influenced by market conditions and current supply chain configuration. The analysis shows that different supply …
Integrating Business Opportunities In Contiguous Economies: Perspectives From Singapore's Gambit In Indonesia, Caroline Yeoh, Sang M Lee, W. Ra Jang
Integrating Business Opportunities In Contiguous Economies: Perspectives From Singapore's Gambit In Indonesia, Caroline Yeoh, Sang M Lee, W. Ra Jang
Research Collection Lee Kong Chian School Of Business
No abstract provided.
Guest Editor’S Introduction: Controversies And Continuities In Management Studies: Essays In Honour Of Karen Legge, Timothy Adrian Robert Clark
Guest Editor’S Introduction: Controversies And Continuities In Management Studies: Essays In Honour Of Karen Legge, Timothy Adrian Robert Clark
Research Collection Lee Kong Chian School Of Business
This issue represents a moment of transition in the history of the Journal of Management Studies. After being involved with the Journal in a number of capacities for over 25 years, Karen Legge is retiring as a General Editor. We mark this event by publishing a collection of critical essays stimulated by her work as an influential writer and researcher in management studies. Whether as colleague, teacher or editor she has continually struck a balance between developmental mentoring, critical insight, sage service, and a sense of humour and enjoyment for each task she undertakes. Karen embodies many of those qualities …
Web Image Learning For Searching Semantic Concepts In Image Databases, Steven Hoi, Michael R. Lyu
Web Image Learning For Searching Semantic Concepts In Image Databases, Steven Hoi, Michael R. Lyu
Research Collection School Of Computing and Information Systems
Without textual descriptions or label information of images, searching semantic concepts in image databases is still a very challenging task. While automatic annotation techniques are yet a long way off, we can seek other alternative techniques to solve this difficult issue. In this paper, we propose to learn Web images for searching the semantic concepts in large image databases. To formulate effective algorithms, we suggest to engage the support vector machines for attacking the problem. We evaluate our algorithm in a large image database and demonstrate the preliminary yet promising results.
Modified Art 2a Growing Network Capable Of Generating A Fixed Number Of Nodes, Ji He, Ah-Hwee Tan, Chew-Lim Tan
Modified Art 2a Growing Network Capable Of Generating A Fixed Number Of Nodes, Ji He, Ah-Hwee Tan, Chew-Lim Tan
Research Collection School Of Computing and Information Systems
This paper introduces the Adaptive Resonance Theory under Constraint (ART-C 2A) learning paradigm based on ART 2A, which is capable of generating a user-defined number of recognition nodes through online estimation of an appropriate vigilance threshold. Empirical experiments compare the cluster validity and the learning efficiency of ART-C 2A with those of ART 2A, as well as three closely related clustering methods, namely online K-Means, batch K-Means, and SOM, in a quantitative manner. Besides retaining the online cluster creation capability of ART 2A, ART-C 2A gives the alternative clustering solution, which allows a direct control on the number of output …
Smu Receives Record S$200 Million -- Fund To Go Towards Scholars Programme, Fund For Excellence And Endowment For The University, Singapore Management University
Smu Receives Record S$200 Million -- Fund To Go Towards Scholars Programme, Fund For Excellence And Endowment For The University, Singapore Management University
SMU Press Releases and News
No abstract provided.
Multi-Period Multi-Dimensional Knapsack Problem And Its Application To Available-To-Promise, Hoong Chuin Lau, M. K. Lim
Multi-Period Multi-Dimensional Knapsack Problem And Its Application To Available-To-Promise, Hoong Chuin Lau, M. K. Lim
Research Collection School Of Computing and Information Systems
This paper is motivated by a recent trend in logistics scheduling, called Available-to-Promise. We model this problem as the multi-period multi-dimensional knapsack problem. We provide some properties for a special case of a single-dimensional problem. Based on insights obtained from these properties, we propose a two-phase heuristics for solving the multi-dimensional problem. We also propose a novel time-based ant colony optimization algorithm. The quality of the solutions generated is verified through experiments, where we demonstrate that the computational time is superior compared with integer programming to achieve solutions that are within a small percentage of the upper bounds.