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Measurement Of The Branching Fraction For D+K-++, Balest, R.; Et Al., M. Thulasidas

Research Collection School Of Computing and Information Systems

Using the CLEO II detector at the Cornell Electron Storage Ring we have measured the ratio of branching fractions, B(D+K-++)/(D0K-+)=2.350.160.16. Our recent measurement of scrB(D0K-+) then gives scrB(D+K-++)=(9.30.60.8)%.

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Measurement Of The Cross Section For Γγ→Pp̄, Artuso, M.; Et Al., M. Thulasidas

Research Collection School Of Computing and Information Systems

No abstract provided.

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Observation Of A New Charmed Strange Meson, Kubota, Y.; Et Al., M. Thulasidas

Research Collection School Of Computing and Information Systems

No abstract provided.

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Observation Of Inclusive B Decays To The Charmed Baryons C++ And C0, Procario, M.; Te Al., M. Thulasidas

Research Collection School Of Computing and Information Systems

No abstract provided.

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Precision Measurement Of The Ds*+-Ds+ Mass Difference, Brown, D.; Et Al., M. Thulasidas

Research Collection School Of Computing and Information Systems

We have measured the vector-pseudoscalar mass splitting M(D*+s)-M(D+s)=144.22±0.47±0.37 MeV significantly more precisely than the previous world average. We minimize the systematic errors by also measuring the vector-pseudoscalar mass difference M(D*0)-M(D0) using the radiative decay D*0→D0γ, obtaining [M(D*+s)-M(D+s)]-[M(D*0)-M(D0)] =2.09±0.47±0.37 MeV. This is then combined with our previous high-precision measurement of M(D*0)-M(D0), which used the decay D*0→D0π0. We also measure the mass difference M(D+s)-M(D+)=99.5±0.6±0.3 MeV, using the φπ+ decay modes of the D+s and D+ mesons.

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User-Database Interface: The Effect Of Abstraction Levels On Query Performance, Hock Chuan Chan, Kwok Kee Wei, Keng Siau

Research Collection School Of Computing and Information Systems

A common classification of data models is based on their abstraction levels: physical, logical and conceptual. The user-database interaction can be similarly classified. For the conceptual-level interaction, the user and the database exchange information on the user's world, e.g., information of entities, relationships, and attributes. For the logical-level interaction, the user and the database communicate based on concepts in the database system, e.g., relations and join operations. We expect users to be familiar with concepts in their world but not the concepts in the database system. This is especially so for infrequent or naive database users. The conceptual level should …

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Quasi-Flag Of Convenience Shipping: The Wave Of The Future, Rex S. Toh, Sock Yong Phang

Research Collection School Of Economics

Many articles and books have been written to extol the advantages and virtues of flags of convenience (FOC) shipping, argue its necessi ty, and defend the practice. However, from the earliest days there has been opposition to FOC shipping, and lately the disenchantment over this questionable form of open registry has led to the potentially rapid growth of what can be termed as quasi-FOC arrangements. This article will first briefly trace the trend from FOCs to quasi-FOCs, outline the legal framework for regulating international shipping, then discuss the problems, opposition, and legal challenges to open registries. Finally, it will trace …

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A Probabilistic Approach To Fault Diagnosis In Linear Lightwave Networks, Robert H. Deng, A. A. Lazar, W. Wang

Research Collection School Of Computing and Information Systems

The application of probabilistic reasoning to fault diagnosis in linear lightwave networks (LLNs) is investigated. The LLN inference model is represented by a Bayesian network (or causal network). An inference algorithm is proposed that is capable of conducting fault diagnosis (inference) with incomplete evidence and on an interactive basis. Two belief updating algorithms are presented which are used by the inference algorithm for performing fault diagnosis. The first belief updating algorithm is a simplified version of the one proposed by Pearl (1988) for singly connected inference models. The second belief updating algorithm applies to multiply connected inference models and is …

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Is A Bond Rating Downgrade Bad News, Good News, Or No News For Stockholders?, Choo Yong, Jeremy Goh, Louis H. Ederington

Research Collection Lee Kong Chian School Of Business

We examine the reaction of common stock returns to bond rating changes. While recent studies find a significant negative stock response to downgrades, we argue that this reaction should not be expected for all downgrades because: (1) some rating changes are anticipated by market participants and (2) downgrades because of an anticipated move to transfer wealth from bondholders to stockholders should be good news for stockholders. We find that downgrades associated with deteriorating financial prospects convey new negative information to the capital market, but that downgrades due to changes in firms' leverage do not.

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Asynchronous Transaction Commitment In Federated Database Systems, San-Yih Hwang, Ee Peng Lim, Jaideep Srivastava

Research Collection School Of Computing and Information Systems

We propose a new (and restricted) model for global transactions which allows asynchronous commitment of subtransactions. Our model requires each global transaction to have a fixed structure with update to the data in at most one database. Based on this transaction model, we present two concurrency control algorithms, namely Asynchronous Site Graph and Asynchronous VirtGlobalSG, which employ asynchronous commitment and achieve global serializability. Compared to other proposed algorithms, our algorithms employ asynchronous commitment so as to increase transaction performance. Furthermore, our algorithms do not put restrictions on transaction data access or local histories.

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Conducting Interorganizational Research Using Key Informants, Nirmalya Kumar, Louis W. Stern, James C. Anderson

Research Collection Lee Kong Chian School Of Business

In this article, we examine the use of the key informant methodology by researchers investigating interorganizational relationships. Authors have advocated the use of multiple informants to increase the reliability and validity of informant reports. However, interorganizational research still tends to rely on single informants. We investigated informant selection and obtaining perceptual agreement among multiple informants, two problems that may have inhibited widespread use of multiple informants. We suggest procedures for dealing with those problems and provide an illustrative application of our proposals.

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Share-Price-Changes-Volume Relation On The Singapore Equity Market, David K. C. Lee, Mohamed Ariff

Research Collection Lee Kong Chian School Of Business

A critical review of the literature on security-price-changes-volume research suggests that the published studies in the United States and one each in Hong Kong and Japan have largely ignored the impacts on the results from autocorrelation, non-normality of distributions, heteroscedasticity and non-linear functional forms. Therefore, the reported findings are not robust. In testing for this relation from a small sample of continuously traded shares in the Singapore share market, we find that consistent results may not be obtained because of violations of basic test conditions. A task that remains is an application of alternative test models with data transformation using …

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Prosecutorial Discretion And The Conditional Waiver: Lessons From The Japanese Experience, Mark Findlay

Research Collection Yong Pung How School Of Law

A unique characteristic of prosecutorial discretion in Japan is the formal practice of suspension. From the later part of last century, public prosecutors were presented with the discretionary option of waiving or suspending prosecution dependent on certain conditions.

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An Adaptive Coding Scheme With Code Combining For Mobile Radio Systems, Robert H. Deng, Huafei Zhou

Research Collection School Of Computing and Information Systems

The authors propose and study an adaptive error-control coding scheme for binary digital FM (BFM) mobile radio transmission. The scheme employs code combining through packet retransmissions. The number of transmissions of a packet is in proportion to the channel fading/noise levels, which is in contrast to time diversity techniques where a fixed number of repetitions of a data packet is performed even in the absence of channel errors. Furthermore, the receiver uses received signal envelopes as channel state information, which significantly improves the throughput and bit error rate (BER) performance. Performance of the proposed scheme is analyzed for frequency-flat Rayleigh …

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Auctions For Transferable Objects: Theory And Evidence From The Vehicle Quota System In Singapore, David K. C. Lee, Winston T. H. Koh

Research Collection Lee Kong Chian School Of Business

This paper studies the hypothesis that auctions with resale markets result in higher prices. The vehicle quota system introduced in Singapore in May 1990 provides the setting. The Certificates of Entitlement (COEs) necessary to purchase new cars were initially transferable for all quota categories. After October 1991, COEs for four major categories became non-transferable. Our results indicate that while the conversion to non-transferability eliminated speculation, it has also intensified competition among car distributors. Auctions for non-transferable COEs in fact led to higher COE prices in three of the four categories.

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Hybrid Arq Schemes For Point-To-Multipoint Communications Over Nonstationary Broadcast Channels, Robert H. Deng

Research Collection School Of Computing and Information Systems

Hybrid automatic-repeat-request (ARQ) error control schemes make use of both error detection and error correction in order to achieve high throughput and low undetected error probabilities on two way channels. Two hybrid ARQ schemes, termed hybrid go-back-N (HGB- N) and hybrid selective-repeat (HSR), are proposed for point-to-multipoint communications over broadcast channels. Both schemes incorporate a concatenated code for error correction and error detection. The performance study of the hybrid schemes is based on a two-state Markov model of a burst noise channel. An analytic solution is derived for the throughput efficiency of the HSR scheme, while approximations and computer simulation …

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Two Measurements Of B0 B-0 Mixing, J. Bartelt, Manoj Thulasidas

Research Collection School Of Computing and Information Systems

We have measured the B0B¯0 mixing probability, χd, using a sample of 965 000 BB¯ pairs from Υ(4S) decays. Counting dilepton events, we find χd=0.157±0.016±0.018+0.028−0.021. Using tagged B0 events, we find χd=0.149±0.023±0.019±0.010. The first (second) error is statistical (systematic). The third error reflects a ±15% uncertainty in the assumption, made in both cases, that charged and neutral B pairs contribute equally to dilepton events. We also obtain a limit on the CP impurity in the B0d system, ‖Re(ε0B)‖

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A Survey Of Expert Systems In Singapore And The Integration Of Multimedia Technology And Expert Systems, Arcot Desai Narasimhalu

Research Collection School Of Computing and Information Systems

Expert systems technologies have been widely adopted by different industries form the early 1980s. There have been examples of expert systems embedded in applications developed for the financial and banking sector, manufacturing, services and government. In section 2 of this paper, we present a scan of expert systems used in different sectors. Section 3 will cover the expert system tools and applications developed in the decade of the 1980s. Section 4 will present some of the ongoing expert systems related activities. Section 5 will extrapolate the present work to forecast the future types of expert systems that might be developed …

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Urban Constraints, Political Imperatives: Environmental 'Design' In Singapore, Victor R. Savage, Lily Kong

Research Collection School of Social Sciences

What lies at the heart of the continuing efforts at social education and engineering? We argue that they stem from a political elite which recognises the constraints facing Singapore and the need to deal with them at national level. Specifically, the government in Singapore has recognised the spatial constraints of an island-state and the dangers of a burgeoning population, particularly in relation to the need to sustain a viable urban ecosystem. They have therefore been conscientious in planning and population control. They have also stressed the importance of remaining economically viable in order to survive and an entire survival and …

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Performance Analysis Of Two Bridged Csma/Cd Networks, C. C. Ko, W. C. Wang, J. L. Du, Robert H. Deng, K. M. Lye

Research Collection School Of Computing and Information Systems

This paper analyses the performance of two non-persistent CSMA/CD LANs linked by a bridge. The main function of the bridge is to buffer all internet work packets and forward them across networks to their destinations. From establishing and solving the main equations governing the behaviour of the bridged networks, the effects of design parameters such as the bridge buffer size and re-transmission back off delay on the performance of the system are studied. It is shown that if these parameters are chosen properly, better throughput and delay performance can be obtained, when compared with an equivalent CSMA/CD network without using …

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Internationalisation Of R&D Improves A Firm's Technical Learning, Arnoud De Meyer

Research Collection Lee Kong Chian School Of Business

Companies have been reluctant to internationalize the R&D function. The reasons for keeping R&D geographically centralized are mostly related to preserving optimal communication patterns. But market forces, and the diffusion of the sources of technological know-how, oblige many companies to decentralize and internationalize their R&D laboratories. How does one manage this international network of laboratories? The author takes the position that companies internationalize R&D to improve the process of technical learning. If this is the case, the management of the laboratory network has to stimulate this technical learning. On the basis of 14 case studies, five areas warrant attention: creating …

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Singapore's Motor Vehicle Policy: Review Of Recent Changes And A Suggested Alternative, Sock Yong Phang

Research Collection School Of Economics

This paper reviews recent developments in motor vehicle policy in Singapore, viz. the motor vehicle quota and weekend car schemes as well as regulations on cars entering and leaving Singapore. The adoption of a vehicle quota system over and above tax restraints on car ownership has made the job of the planner easier but has resulted in a great deal of price uncertainty in the motor vehicle market. The attendant result of price uncertainty has been speculation or rent seeking, necessitating several adjustments to the rules for the vehicle quota scheme in an attempt to counter speculation. This paper proposes …

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Police Authority, Respect And Shaming, Mark Findlay

Research Collection Yong Pung How School Of Law

This paper explores structures of police authority which seek legitimacy though consensus and respect within the ideology of community policing. Respect may be presented as one of the principal, voluntary bonding relationships within any community, and is proposed as a key to analysing the prevention and control potential of policing strategies. Shaming comes into the picture as an indicator of the impact of police authority within different community/cultural settings. While reintegration makes sense in terms of community symbolism, the significance of policing as part of the reintegrative process depends on its status and interaction with community interests.

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Performance Of A Token-Passing System With Batch Arrivals And Its Application To File Transfers, Robert H. Deng, Xuanyu Zhang, Kuan Tase Huang

Research Collection School Of Computing and Information Systems

This paper investigates the performance of token-passing systems with limited service and Poisson arrivals. For pure Poisson arrivals, the Laplace-Stieltjes Transform (LST) of an approximate customer/packet waiting time distribution is derived and expressed as a functional equation, from which the approximate mean and variance of waiting time are obtained; for batch Poisson arrivals, an approximate mean of waiting time is derived. Mean waiting time approximations are compared against both simulation results and other results presented in the literature; the variance approximation is evaluated by comparing it to simulation results only, since no other results on variance have been reported so …

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Performance Analysis Of Interconnected Lans With Server/Client Configuration, Jiangling Du, Robert H. Deng, Chi Chung Ko

Research Collection School Of Computing and Information Systems

In this paper, we study the end-to-end performance of interconnected local area networks (LAN) with server/client configuration. The system uses bridges to connect two token-ring LANs through a high-speed communication link. A server station located on one LAN receives requests from client-stations on the same LAN as well as on the remote LAN, processes the requests, and returns responses to the client-stations. The end-to-end connections of the interconnected network are modelled as single-chain and multiple-chain closed queueing systems, which are solved by an iterative algorithm based on the MVA (mean value analysis) method. The performance examples are shown in terms …

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Griffith University Library Law Collection, Elizabeth Naumczyk

Research Collection Library

No abstract provided.

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Federated Autonomous Databases: Project Overview, Satya Prabhakar, Jiandong Huang, James Richardson, Jaideep Srivastava, Ee Peng Lim, Sham Navathe, Ashok Savarase, Mark Foresti

Research Collection School Of Computing and Information Systems

The paper presents an overview of an ongoing research program, Federated Autonomous Databases, sponsored by Rome Laboratory (US Air Force) and conducted by Honeywell in collaboration with the University of Minnesota and Georgia Institute of Technology. This program is exploratory in nature and is aimed at understanding and solving, within the scope of the program definition, the problem of providing integrated access to distributed, heterogeneous and autonomous databases.

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Rhetorical Vision Of Men And Women Managers In Singapore, Jean S. K. Lee, Hwee Hoon Tan

Research Collection Lee Kong Chian School Of Business

Findings from a content analysis of newspaper articles are reported to uncover the rhetorical visions of men and women managers portrayed by the media in Singapore and to unfold the inherent conflicting forces that women managers face. The vision of women managers that was portrayed by the press emphasized the dilemmas and role conflicts that the women managers face, whereas the vision emphasized for the men managers was their managerial abilities. The study also uncovered that the success of the women managers relied on a support system that consisted of a male mentor, a supportive husband, and a mother or …

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Ideological Hegemony And The Political Symbolism Of Religious Buildings In Singapore, Lily Kong

Research Collection School of Social Sciences

Cultural geographers have for too long ignored the association between the 'religious' and the 'political', concentrating instead on separating the 'religious' from the sociopolitical and economic forces in society. The challenge is taken up in this paper in an analysis of the contemporary meanings and values of religious buildings in Singapore as invested by the state. Attention is paid to the state's conceptions of religion and religious space and the roles it plays in influencing such space. The ways in which, through its various roles, the state in Singapore plays a significant part in influencing context and hence in shaping …

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Observation Of B0 Decay To Two Charmless Mesons, M. Battle, Manoj Thulasidas

Research Collection School Of Computing and Information Systems

We report results from a search for the decays B0→π+π-, B0→K+π-, and B0→K+K-. We find 90% confidence level upper limits on the branching fractions, Bππ

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Full-Text Articles in Entire DC Network

Measurement Of The Branching Fraction For D+K-++, Balest, R.; Et Al., M. Thulasidas

Research Collection School Of Computing and Information Systems

Measurement Of The Cross Section For Γγ→Pp̄, Artuso, M.; Et Al., M. Thulasidas

Research Collection School Of Computing and Information Systems

Observation Of A New Charmed Strange Meson, Kubota, Y.; Et Al., M. Thulasidas

Research Collection School Of Computing and Information Systems

Observation Of Inclusive B Decays To The Charmed Baryons C++ And C0, Procario, M.; Te Al., M. Thulasidas

Research Collection School Of Computing and Information Systems

Precision Measurement Of The Ds*+-Ds+ Mass Difference, Brown, D.; Et Al., M. Thulasidas

Research Collection School Of Computing and Information Systems

User-Database Interface: The Effect Of Abstraction Levels On Query Performance, Hock Chuan Chan, Kwok Kee Wei, Keng Siau

Research Collection School Of Computing and Information Systems

Quasi-Flag Of Convenience Shipping: The Wave Of The Future, Rex S. Toh, Sock Yong Phang

Research Collection School Of Economics

A Probabilistic Approach To Fault Diagnosis In Linear Lightwave Networks, Robert H. Deng, A. A. Lazar, W. Wang

Research Collection School Of Computing and Information Systems

Is A Bond Rating Downgrade Bad News, Good News, Or No News For Stockholders?, Choo Yong, Jeremy Goh, Louis H. Ederington

Research Collection Lee Kong Chian School Of Business

Asynchronous Transaction Commitment In Federated Database Systems, San-Yih Hwang, Ee Peng Lim, Jaideep Srivastava

Research Collection School Of Computing and Information Systems

Conducting Interorganizational Research Using Key Informants, Nirmalya Kumar, Louis W. Stern, James C. Anderson

Research Collection Lee Kong Chian School Of Business

Share-Price-Changes-Volume Relation On The Singapore Equity Market, David K. C. Lee, Mohamed Ariff

Research Collection Lee Kong Chian School Of Business

Prosecutorial Discretion And The Conditional Waiver: Lessons From The Japanese Experience, Mark Findlay

Research Collection Yong Pung How School Of Law

An Adaptive Coding Scheme With Code Combining For Mobile Radio Systems, Robert H. Deng, Huafei Zhou

Research Collection School Of Computing and Information Systems

Auctions For Transferable Objects: Theory And Evidence From The Vehicle Quota System In Singapore, David K. C. Lee, Winston T. H. Koh

Research Collection Lee Kong Chian School Of Business

Hybrid Arq Schemes For Point-To-Multipoint Communications Over Nonstationary Broadcast Channels, Robert H. Deng

Research Collection School Of Computing and Information Systems

Two Measurements Of B0 B-0 Mixing, J. Bartelt, Manoj Thulasidas

Research Collection School Of Computing and Information Systems

A Survey Of Expert Systems In Singapore And The Integration Of Multimedia Technology And Expert Systems, Arcot Desai Narasimhalu

Research Collection School Of Computing and Information Systems

Urban Constraints, Political Imperatives: Environmental 'Design' In Singapore, Victor R. Savage, Lily Kong

Research Collection School of Social Sciences

Performance Analysis Of Two Bridged Csma/Cd Networks, C. C. Ko, W. C. Wang, J. L. Du, Robert H. Deng, K. M. Lye

Research Collection School Of Computing and Information Systems

Internationalisation Of R&D Improves A Firm's Technical Learning, Arnoud De Meyer

Research Collection Lee Kong Chian School Of Business

Singapore's Motor Vehicle Policy: Review Of Recent Changes And A Suggested Alternative, Sock Yong Phang

Research Collection School Of Economics

Police Authority, Respect And Shaming, Mark Findlay

Research Collection Yong Pung How School Of Law

Performance Of A Token-Passing System With Batch Arrivals And Its Application To File Transfers, Robert H. Deng, Xuanyu Zhang, Kuan Tase Huang

Research Collection School Of Computing and Information Systems

Performance Analysis Of Interconnected Lans With Server/Client Configuration, Jiangling Du, Robert H. Deng, Chi Chung Ko

Research Collection School Of Computing and Information Systems

Griffith University Library Law Collection, Elizabeth Naumczyk

Research Collection Library

Federated Autonomous Databases: Project Overview, Satya Prabhakar, Jiandong Huang, James Richardson, Jaideep Srivastava, Ee Peng Lim, Sham Navathe, Ashok Savarase, Mark Foresti

Research Collection School Of Computing and Information Systems

Rhetorical Vision Of Men And Women Managers In Singapore, Jean S. K. Lee, Hwee Hoon Tan

Research Collection Lee Kong Chian School Of Business

Ideological Hegemony And The Political Symbolism Of Religious Buildings In Singapore, Lily Kong

Research Collection School of Social Sciences

Observation Of B0 Decay To Two Charmless Mesons, M. Battle, Manoj Thulasidas

Research Collection School Of Computing and Information Systems