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Test Of The Flavour Independence Of Αs, D. Buskulic, Manoj Thulasidas Jul 1995

Test Of The Flavour Independence Of Αs, D. Buskulic, Manoj Thulasidas

Research Collection School Of Computing and Information Systems

Using about 950 000 hadronic events collected during 1991 and 1992 with the ALEPH detector, the ratios r b = bs=udsc s and r uds = uds s =cbs have been measured in order to test the avour independence of the strong coupling constant s . The analysis is based on event{shape variables using the full hadronic sample, two b-quark samples enriched by lepton tagging and lifetime tagging, and a light-quark sample enriched by lifetime antitagging. The combined results are r b = 1:002 0:023 and r uds = 0:971 0:023.

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Popular Music In Geographical Analyses, Lily Kong Jun 1995

Popular Music In Geographical Analyses, Lily Kong

Research Collection School of Social Sciences

As an area of geographical inquiry, popular music has not been explored to any large extent. Where writings exist, they have been somewhat divorced from recent theoretical and methodological questions that have rejuvenated social and cultural geography (see, for example, Cosgrove and Jackson, 1987; Jackson, 1989; Cosgrove, 1989; 1990; Anderson and Gale, 1992; Bames and Duncan, 1992). In this article I will focus on the interface between geography and popular music, focusing specifically on the contributions of such exploration towards cultural and social understanding. In what follows, I will first discuss the reasons for geographers’ relative neglect of popular music …

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Rivalry And The Industry Model Of Scottish Knitwear Producers, Joseph F. Porac, Howard Thomas, Fiona Wilson, Douglas Patton, Alaina Kanfer Jun 1995

Rivalry And The Industry Model Of Scottish Knitwear Producers, Joseph F. Porac, Howard Thomas, Fiona Wilson, Douglas Patton, Alaina Kanfer

Research Collection Lee Kong Chian School Of Business

In this paper we argue that market boundaries are socially constructed around a collective cognitive model that summarizes typical organizational forms within an industry. This model is produced when firms observe each other's actions and define unique product positions in relation to each other. Our study examines the question of how firms define a reference group of rivals when market cues are ambiguous and interorganizational variety is high and identifies the industry model underlying rivalry among Scottish knitwear producers. The data suggest that a six-category model of organizational forms best describes the common sense of competition in the industry and …

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The Forward-Backward Asymmetry For Charm Quarks At The Z Pole, D. Buskulic, Manoj Thulasidas Jun 1995

The Forward-Backward Asymmetry For Charm Quarks At The Z Pole, D. Buskulic, Manoj Thulasidas

Research Collection School Of Computing and Information Systems

From 1.4 million hadronic Z decays collected by the ALEPH detector at LEP, an enriched sample of Z → cc̄ events is extracted by requiring the presence of a high momentum D∗±. The charm quark forward-backward charge asymmetry at the Z pole is measured to be AFB0.c = (8.0 ± 2.4) % corresponding to an effective electroweak mixing angle of sin2θWeff = 0.2302 ± 0.0054.

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Myriad: Design And Implementation Of A Federated Database Prototype, Ee Peng Lim, San-Yih Hwang, Jaideep Srivastava, Dave Clements, M. Ganesh May 1995

Myriad: Design And Implementation Of A Federated Database Prototype, Ee Peng Lim, San-Yih Hwang, Jaideep Srivastava, Dave Clements, M. Ganesh

Research Collection School Of Computing and Information Systems

A key problem in providing enterprise-wide information is the integration of databases that have been independently developed. An important requirement is to accommodate heterogeneity and maintain the autonomy of component databases. Myriad is a federated database prototype developed at the University of Minnesota, to provide a testbed for investigating alternatives in architecture and algorithms for database integration, query processing and optimization, and concurrency control and recovery. The system incorporates our group's research results in these areas. This paper describes our experiences in the design and implementation of Myriad, and in the project management. Special emphasis is given to discussing design …

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The Effect Of A Database Feedback System On User Performance, H. Chan, K. Wei, Keng Siau May 1995

The Effect Of A Database Feedback System On User Performance, H. Chan, K. Wei, Keng Siau

Research Collection School Of Computing and Information Systems

There are two main approaches to improving the effectiveness of database interfaces. One is to raise the level of abstraction for the content of the user-database interaction. The relational model belonging to the logical level has replaced the hierarchical and network models that belong to the lower physical level. It is likely that the relational model will eventually be replaced by models belonging to the even higher conceptual level, such as entity relationship models and object-oriented models. The second approach is to enhance the actual interaction process. This can be done by providing better feedback to the user. Feedback can …

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Search For Supersymmetric Particles With R-Parity Violation In Z Decays, D. Buskulic, Manoj Thulasidas Apr 1995

Search For Supersymmetric Particles With R-Parity Violation In Z Decays, D. Buskulic, Manoj Thulasidas

Research Collection School Of Computing and Information Systems

Searches for supersymmetric particles produced in e+e− interactions at the Z peak have been performed under the assumptions that R-parity is not conserved, that the dominant R-parity violating coupling involves only leptonic fields, and that the lifetime of the lightest supersymmetric particle can be neglected. In a data sample collected by the ALEPH detector at LEP up to 1993, and corresponding to almost two million hadronic Z decays, no signal was observed. As a result, supersymmetric particle masses and couplings are at least as well constrained as under the usual assumption of R-parity conservation.

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Non-Governmental Organizations, Non-Violent Action, And Post-Modern Politics In Thailand, William A. Callahan Apr 1995

Non-Governmental Organizations, Non-Violent Action, And Post-Modern Politics In Thailand, William A. Callahan

Research Collection School of Social Sciences

y interpretations of Thailand's May 1 992 mass movement and mili- tary crackdown dwell on middle-class democracy formulae and/or mobacracy threats to national security. The paper argues that the two most interesting aspects of the May Events - non-violent tactics and non-governmental organizations - challenged not just the soldiers, but the whole military-directed discourse of political organization in Thailand. Utilizing feminist theory's notion of oppositional consciousness, the non-governmental organization/non-violent action dynamic is framed as a motivating force behind the social movement of April-May 1 992. This challenge can be called "post-modern" because, with its multi-centred organization and centrifugal forces, it …

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Exceptions And Exception Handling In Computerized Information Processes, Diane M. Strong, Steven M. Miller Apr 1995

Exceptions And Exception Handling In Computerized Information Processes, Diane M. Strong, Steven M. Miller

Research Collection School Of Computing and Information Systems

Exceptions, situations that cannot be correctly processed by computer systems, occur frequently in computer-based information processes. Five perspectives on exceptions provide insights into why exceptions occur and how they might be eliminated or more efficiently handled. We investigate these perspectives using an in-depth study of an operating information process that has frequent exceptions. Our results support the use of a total quality management (TQM) approach of eliminating exceptions for some exceptions, in particular, those caused by computer systems that are poor matches to organizational processes. However, some exceptions are explained better by a political system perspective of conflicting goals between …

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An Upper Limit For The Τ Neutrino Mass From Τ → 5Π(Π0)Ντ Decays, D. Buskulic, M. Thulasidas Apr 1995

An Upper Limit For The Τ Neutrino Mass From Τ → 5Π(Π0)Ντ Decays, D. Buskulic, M. Thulasidas

Research Collection School Of Computing and Information Systems

From a sample of 152,000 τ decays collected by the ALEPH detector at LEP an upper limit of 24 MeV at 95% CL on the τ neutrino mass has been determined. The limit is obtained using a two dimensional likelihood fit of the visible energy and the invariant mass distribution of 25 τ → 5π(π0)ντ events.

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For Better Of For Worse: The Statutory Derivative Action In Singapore, Pearlie Koh Mar 1995

For Better Of For Worse: The Statutory Derivative Action In Singapore, Pearlie Koh

Research Collection Yong Pung How School Of Law

Managerial accountability (or the lack of it) to shareholders has been described as “one of the major socio-legal problems of the twentieth century”. That such a comment has come to be made seems inevitable given the fact that common law courts have consistently upheld, in the absence of fraud, the managerial authority of the Board against the shareholders in general meeting. The Directors have almost absolute authority to decide what is, in their opinion, in the commercial interests of the company. The concerns of shareholders are obvious in public companies where, for the sake of economic efficiency and as a …

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Michel Parameters And Τ Neutrino Helicity From Decay Correlations In Z → Τ+Τ-, D. Buskulic, Manoj Thulasidas Mar 1995

Michel Parameters And Τ Neutrino Helicity From Decay Correlations In Z → Τ+Τ-, D. Buskulic, Manoj Thulasidas

Research Collection School Of Computing and Information Systems

No abstract provided.

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Study Of The Subjet Structure Of Quark And Gluon Jets, D. Buskulic, D., M. Thulasidas Mar 1995

Study Of The Subjet Structure Of Quark And Gluon Jets, D. Buskulic, D., M. Thulasidas

Research Collection School Of Computing and Information Systems

Measurements of the subjet structure of quark and gluon jets in hadronic Z decays are presented. The analysis is based on one million hadronic events recorded by the Aleph detector. Roughly symmetric three-jet events are selected with a coarse jet-resolution cut-off, y1. Gluon jets are identified with a purity of 94.6% in those events where evidence of long-lived heavy-flavour hadrons in the other two jets is found. The jets are then analyzed using a smaller cut-off y0 (< y1) so that subjets are resolved. The properties of the jets (subjet multiplicities (Nq), (Ng) and rates Rng(q) for n = 1, 2, 3, 4) are determined and are found to be in good agreement with the expectations of perturbative QCD as long as the subjet resolution parameter y0 is sufficiently large to keep non-perturbative effects small. In particular, the ratio , which to leading order in QCD is given by the ratio of colour factors , is measured to be 1.96 ± 0.15 for y0 = 2 · 10−3, but falls to 1.29 ± 0.03 for y0 = 1.6 · 10−5.

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A Bayesian Technique For Refining The Uncertainty In Global Energy Model Forecasts, F. Ted Tschang, Hadi Dowlatabadi Mar 1995

A Bayesian Technique For Refining The Uncertainty In Global Energy Model Forecasts, F. Ted Tschang, Hadi Dowlatabadi

Research Collection Lee Kong Chian School Of Business

Global energy models have a large degree of uncertainty associated with them. This consists of uncertainty in the model structure as well as uncertainty in the exogenous input parameters. This paper combines Monte Carlo methods with Bayesian updating techniques to provide a method for refining the uncertainty in the Edmonds-Reilly global energy model. The Bayesian updating technique uses likelihood-based windows constructed from actual observations of the output variables to filter out the model simulations that do not conform with the observed output. The windows are based on outputs of energy consumption and carbon emissions. Two alternative model structures are examined: …

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The Effects Of Supplier Fairness On Vulnerable Resellers, Nirmalya Kumar, Lisa K. Scheer, Jan-Benedict E. M. Steenkamp Feb 1995

The Effects Of Supplier Fairness On Vulnerable Resellers, Nirmalya Kumar, Lisa K. Scheer, Jan-Benedict E. M. Steenkamp

Research Collection Lee Kong Chian School Of Business

This study examines the role of supplier fairness in developing long-term relationships between relatively smaller, vulnerable resellers and larger, powerful suppliers. The authors conceptualize two components of fairness-distributive fairness, that is, the fairness of outcomes received by the reseller from carrying the supplier's line, and procedural fairness, the fairness of procedures and processes used by the supplier in relation to its resellers. Testing their hypotheses from the perspective of automobile dealers, the authors find strong evidence that vulnerable resellers' perceptions of both distributive and procedural fairness enhance their relationship quality, although these effects are moderated by the level of outcomes …

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The Multiplier Effect: Singapore's Hospitality Industry, Habibullah Khan, Sock-Yong Phang, Rex S. Toh Feb 1995

The Multiplier Effect: Singapore's Hospitality Industry, Habibullah Khan, Sock-Yong Phang, Rex S. Toh

Research Collection School Of Economics

Tourism's contribution to Singapore's economy has increased over time. Tourism contributed 11.9% to Singapore's GDP in 1992, about half of that from direct revenues. Indirect and induced sources contributed about equally to the other half. While the direct effect of tourist expenditures on the Singapore economy are predominant, the indirect and induced effects are also significant, indicating strong sectoral linkages within the local economy, especially with respect to the hospitality industry.

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A Type I Hybrid Arq System With Adaptive Code Rates, Robert H. Deng, Michael L. Lin Feb 1995

A Type I Hybrid Arq System With Adaptive Code Rates, Robert H. Deng, Michael L. Lin

Research Collection School Of Computing and Information Systems

Type I hybrid ARQ systems use an error-control code of fixed rate for error-correction in each transmitted packet. In such systems, the code rate must be carefully chosen to match the channel bit error rate (BER) in order to maximize system throughput. Whenever there is a mismatch between code rate and channel BER, the throughput suffers. In this paper, we proposed a type I hybrid ARQ system which automatically adjusts its code rates to match channel BERs. The proposed system is very simple to implement and yet performs significantly better than type I hybrid ARQ systems of fixed code rate

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A Study Of D*+ Π- Production In Semileptonic B Decay, D. Buskulic, M. Thulasidas Feb 1995

A Study Of D*+ Π- Production In Semileptonic B Decay, D. Buskulic, M. Thulasidas

Research Collection School Of Computing and Information Systems

In a sample of 1.5 million hadronic decays of the Z collected by the ALEPH detector, a search is carried out for the decays B→ D10(2420)l−νX and B→ D2∗0(2460)l−νX. The product branching ratio for D10 production is measured to be Br(b →B) × Br(B→ D10l−νX) × Br(D10→ D∗+π−) = (2.04 ± 0.58stat± 0.34syst) × 10−3, and a 95% confidence level limit of Br(b →B) × Br(B→ D2∗0l−νX) × Br(D2∗0→ D∗+π−) ≤ 0.81 × 10−3 is obtained for D2∗0 production.A topological search sensitive to the processes above, but also to wide resonances that decay to D∗+π− and to non-resonant D∗+π− production …

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R&D/Marketing Communication During The Fuzzy Front-End, Rudy K. Moenaert, Arnoud De Meyer, William E. Souder, Dirk Deschoolmeester Jan 1995

R&D/Marketing Communication During The Fuzzy Front-End, Rudy K. Moenaert, Arnoud De Meyer, William E. Souder, Dirk Deschoolmeester

Research Collection Lee Kong Chian School Of Business

The planning stage of an innovation project has a great effect on the commercial performance of the project. During the "fuzzy front-end", the organization formulates a concept of the product to be developed, and determines whether or not the organization will invest resources in the concrete development of the idea. The integration of R&D and marketing activities is a necessary condition for success in innovation projects. The research question of this study is: from an information processing perspective, what role does information transfer play in integrating R&D and marketing functions during the planning stage, and what effects do project formalization …

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Rule Extraction: From Neural Architecture To Symbolic Representation, Gail A. Carpenter, Ah-Hwee Tan Jan 1995

Rule Extraction: From Neural Architecture To Symbolic Representation, Gail A. Carpenter, Ah-Hwee Tan

Research Collection School Of Computing and Information Systems

This paper shows how knowledge, in the form of fuzzy rules, can be derived from a supervised learning neural network called fuzzy ARTMAP. Rule extraction proceeds in two stages: pruning, which simplifies the network structure by removing excessive recognition categories and weights; and quantization of continuous learned weights, which allows the final system state to be translated into a usable set of descriptive rules. Three benchmark studies illustrate the rule extraction methods: (1) Pima Indian diabetes diagnosis, (2) mushroom classification and (3) DNA promoter recognition. Fuzzy ARTMAP and ART-EMAP are compared with the ADAP algorithm, the k nearest neighbor system, …

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First Measurement Of The Quark-To-Photon Fragmentation Function, D. Buskulic, Manoj Thulasidas Jan 1995

First Measurement Of The Quark-To-Photon Fragmentation Function, D. Buskulic, Manoj Thulasidas

Research Collection School Of Computing and Information Systems

Earlier measurements at LEP of isolated hard photons in hadronic Z decays, attributed to radiation from primary quark pairs, have been extended in the ALEPH experiment to include hard photon production inside hadron jets. Events are selected where all particles combine democratically to form hadron jets, one of which contains a photon with a fractional energy z 0:7. After statistical subtraction of non-prompt photons, the quark-to-photon fragmentation function, D(z), is extracted directly from the measured 2-jet rate. By taking into account the perturbative contributions to D(z) obtained from an O(S ) QCD calculation, the unknown non-perturbative component of D(z) is …

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Inclusive Production Of Neutral Vector Mesons In Hadronic Z Decays, D. Buskulic, Manoj Thulasidas Jan 1995

Inclusive Production Of Neutral Vector Mesons In Hadronic Z Decays, D. Buskulic, Manoj Thulasidas

Research Collection School Of Computing and Information Systems

Data on the inclusive production of the neutral vector mesonsρ 0(770),ω(782), K*0(892), andφ(1020) in hadronic Z decays recorded with the ALEPH detector at LEP are presented and compared to Monte Carlo model predictions. Bose-Einstein effects are found to be important in extracting a reliable value for theρ 0 production rate. An averageρ 0 multiplicity of 1.45±0.21 per event is obtained. Theω is detected via its three pion decay modeω→π + π − π 0 and has a total rate of 1.07±0.14 per event. The multiplicity of the K*0 is 0.83±0.09, whilst that of theφ is 0.122±0.009, both measured using their …

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Object Interactions As First Class Objects: From Design To Implementation, Mahesh Dodani, Benjamin Kok Siew Gan, Lizette Velazquez Jan 1995

Object Interactions As First Class Objects: From Design To Implementation, Mahesh Dodani, Benjamin Kok Siew Gan, Lizette Velazquez

Research Collection School Of Computing and Information Systems

Collaborations between objects make up the dynamic behavior of OO software. These collaborations among objects require careful design and implementation. Treating the interactions as responsibilities that are integrated in the participating objects, results in tight coupling between objects. Tight coupling increases complexity and reduces reusability. Object interactions need to be first class objects from design to implementation. Our research provides a unified approach to model and implement these interactions as first class objects. During analysis and design, they are modeled using DynaSpecs. During implementation, they are coded with a new language construct called Compositions. DynaSpecs and Compositions provide a consistent …

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Music And Cultural Politics: Ideology And Resistance In Singapore, Lily Kong Jan 1995

Music And Cultural Politics: Ideology And Resistance In Singapore, Lily Kong

Research Collection School of Social Sciences

This paper focuses on popular music written and produced by Singaporeans to illustrate the nature of social relationships based on ideological hegemony and resistance. Analysis is based on two groups of music: 'national' songs supported by the government in the 'Sing Singapore' programme; and songs brought together in Not the Singapore song book. Interviews with local lyricists and analysis of video productions provide supplementary information. Music is used by the ruling elite to perpetuate certain ideologies aimed at political socialization and to inculcate a civil religion that directs favour and fervour towards the nation. Music is also a form of …

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Equal Protection And Sexual Orientation, Jack Tsen-Ta Lee Jan 1995

Equal Protection And Sexual Orientation, Jack Tsen-Ta Lee

Research Collection Yong Pung How School Of Law

Equality is the thread running through the fundamental liberties enshrined in our Constitution. ... Equality, expressed in Art 12 of the [Singapore] Constitution, is also a specific right enforceable by the court. The difficulty comes in applying this deceptively simple concept to real-life situations. ... In considering the validity of legislation, Singapore and Malaysian courts have generally favored rational review, a modest conception of equal protection, unlike their American counterparts which have adopted a more expansive reading in the form of strict and intermediate review. This article examines how these three levels of equal protection review operate, and argues that …

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Vertrauen Und Chinesisches Wirtschaftshandeln In Singapur: Zur Kulturellen Und Sozialstrukturellen Bedingtheit Von Vertrauensbildung Und Kooperation In Chinesischen Geschäftsbeziehungen, Thomas Menkhoff Jan 1995

Vertrauen Und Chinesisches Wirtschaftshandeln In Singapur: Zur Kulturellen Und Sozialstrukturellen Bedingtheit Von Vertrauensbildung Und Kooperation In Chinesischen Geschäftsbeziehungen, Thomas Menkhoff

Research Collection Lee Kong Chian School Of Business

Based on in-depth interviews with Chinese merchant exporters in Singapore, the article explores why personal forms of trust (the Chinese translation is xinyong) are key elements in the complex web of business and associated social relationships.

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Towards An Understanding Of Chinese Business Networks In Asia-Pacific: The Singapore Case, Thomas Menkhoff, Chalmers Labig Jan 1995

Towards An Understanding Of Chinese Business Networks In Asia-Pacific: The Singapore Case, Thomas Menkhoff, Chalmers Labig

Research Collection Lee Kong Chian School Of Business

The embeddedness of entrepreneurs in local, regional or global business networks based on kinship, clanship, territorial or ethnic ties and solidarities has often been cited as characteristic of the Chinese business community in Southeast Asia. Qualitative interviews with Singaporean Chinese merchant-exporters were conducted in order to examine this thesis and shed light on the various "guanxi bases" of their international trading networks. The findings suggest that there is a strong tendency among these Singaporean entrepreneurs towards external commercial transactions with "outsiders" and "friends" rather than with "kin" whether by blood, marriage, or ascription. Kinship reciprocity may curb the autonomy and …

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Port Multipliers For Singapore: Impact On Income, Output, And Employment, Rex S. Toh, Sock-Yong Phang, Habibullah Khan Jan 1995

Port Multipliers For Singapore: Impact On Income, Output, And Employment, Rex S. Toh, Sock-Yong Phang, Habibullah Khan

Research Collection School Of Economics

This article examines the contribution of the activities of the Port of Singapore Authority (PSA), a government-owned statutory board which operates almost all of the port related activities in Singapore, to the prosperity of the entire country, by way of multiplier analysis. Input-output analysis is used to compute the income, output, and employment multipliers of port activities, broken down into direct, indirect, and induced effects. The policy implications on port investment and maritime policy follow.

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International Rights And Australian Adaptations: Recent Developments In Criminal Investigation, Mark Findlay Jan 1995

International Rights And Australian Adaptations: Recent Developments In Criminal Investigation, Mark Findlay

Research Collection Yong Pung How School Of Law

To empower the "right to be presumed innocent until proven guilty according to law", Article 14 of the International Covenant on Civil and Political Rights identifies a range of "minimum guarantees" for suspects under investigation and for the accused at trial. Significant among these is that the suspect/accused is "not to be compelled to testify against himself or to confess guilt".

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Separability, Competence-Competence And The Arbitrator’S Jurisdiction In Singapore, Jack Tsen-Ta Lee Jan 1995

Separability, Competence-Competence And The Arbitrator’S Jurisdiction In Singapore, Jack Tsen-Ta Lee

Research Collection Yong Pung How School Of Law

The concepts of separability and competence-competence, which promote arbitral autonomy, exist in many jurisdictions. This article surveys the extent of their acceptance in Singapore's domestic and international arbitration law, and suggests that legislative refinements are necessary to remove doubts and resolve conflicts between the law and the SIAC [Singapore International Arbitration Centre] Rules.

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