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Modelling Medical Decisions In Dynamol: A New General Framework Of Dynamic Decision Analysis, Tze-Yun Leong, Cungen Cao Aug 1998

Modelling Medical Decisions In Dynamol: A New General Framework Of Dynamic Decision Analysis, Tze-Yun Leong, Cungen Cao

Research Collection School Of Computing and Information Systems

Dynamic decision analysis concerns decision problems in which both time and uncertainty are explicitly considered. We present a new dynamic decision analysis framework, called DynamoL, that supports graphical presentation of the decision factors in multiple perspectives. To alleviate the difficulty in assessing conditional probabilities over time in dynamic decision models, DynaMoL incorporates a Bayesian learning system to automatically learn the probabilistic parameters from large medical databases. We describe the DynaMoL modeling and learning architecture through a medical decision problem on the optimal follow-up schedule for patients after curative colorectal cancer surgery. We also show that the modeling experience and results …

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Manufacturing Operations In Europe: Where Do We Go Next?, Arnoud De Meyer Jun 1998

Manufacturing Operations In Europe: Where Do We Go Next?, Arnoud De Meyer

Research Collection Lee Kong Chian School Of Business

Extrapolating from the results of a 10-year INSEAD Survey, the author offers some views on the future for manufacturing in Europe. The model on which the Survey was based indicates that competitive priorities and action plans in manufacturing changed over the 10-year period. Taking lessons from these, the author makes some 'informed guesses' on the future implications for European manufacturers in the form of seven normative features: innovation in the value package; close integration between manufacturing and service; the importance of internationalism; flexible project-based organisation; more integrated management of the value added chain; successful transformation of operational programmes into strategic …

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Exalting The Past: Nostalgia And The Construction Of Heritage In Children's Literature, Lily Kong, Lily Tay Jun 1998

Exalting The Past: Nostalgia And The Construction Of Heritage In Children's Literature, Lily Kong, Lily Tay

Research Collection School of Social Sciences

In this paper, we analyse the portrayal of Singapore in local children's literature and seek to understand why such a portrayal was prominent, and to what effect. We argue that this literature is characterized by a nostalgic recollection of past times and places. This emergence of the past as an important concern in Singapore is not limited to the literary arena, but reflects a larger condition: a broader adult yearning to transcend the constrictions of present place and time. We suggest that this nostalgia has surfaced because of the phenomenal changes in Singapore, which have caused people to come face …

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Querying Structured Web Resources, Ee Peng Lim, Cheng Hai Tan, Boon Wan Lim, Wee-Keong Ng Jun 1998

Querying Structured Web Resources, Ee Peng Lim, Cheng Hai Tan, Boon Wan Lim, Wee-Keong Ng

Research Collection School Of Computing and Information Systems

To provide query facilities over Web resources, several web search engines such as Yahoo, Altavista, Infoseek, etc. have been developed. Most prominently, web search engines have been used to index all web pages on the Internet. The queries supported by these search engines are mainly designed to reveal web pages that meet the search criteria specified by the users. In this way, the search engines have been used as some kind of discovery tools. The queries supported are known as discovery queries. On the other hand, a web search engine can also be used to index and support queries over …

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Database Selection Techniques For Routing Bibliographic Queries, Ee Peng Lim, Wee-Keong Ng, Jian Xu, Yinyan Cao Jun 1998

Database Selection Techniques For Routing Bibliographic Queries, Ee Peng Lim, Wee-Keong Ng, Jian Xu, Yinyan Cao

Research Collection School Of Computing and Information Systems

No abstract provided.

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A Measurement Of The Inclusive B → Sγ Branching Ratio, R. Barate, Manoj Thulasidas Jun 1998

A Measurement Of The Inclusive B → Sγ Branching Ratio, R. Barate, Manoj Thulasidas

Research Collection School Of Computing and Information Systems

The avour changing neutral current decay b ! s has been detected in hadronic Z decays collected by ALEPH at LEP. The signal is isolated in lifetime-tagged b b events by the presence of a hard photon associated with a system of high momentum and high rapidity hadrons. The background processes are normalised from the data themselves. The inclusive branching ratio is measured to be (3:11 0:80stat 0:72syst) 104 ; consistent with the Standard Model expectation via penguin processes

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The New Aleph Silicon Vertex Detector, D. Creanza, Manoj Thulasidas May 1998

The New Aleph Silicon Vertex Detector, D. Creanza, Manoj Thulasidas

Research Collection School Of Computing and Information Systems

The ALEPH collaboration, in view of the importance of effective vertex detection for the Higgs boson search at LEP 2, decided to upgrade the previous vertex detector. Main changes were an increased length (+/- 20 cm), a higher granularity for r phi view (50 mu m), a new preamplifier (MX7 rad hard chip), a polymide (upilex) fan-out on z side to carry the signals from the strips to the front-end electronics outside the fiducial region reducing consequently the passive material in the central region by a factor of two. The detector, the running experience and its performance will be described. …

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Resonant Structure And Flavour Tagging In The Bπ± System Using Fully Reconstructed B Decays, Barate, R.; Et Al., M. Thulasidas Apr 1998

Resonant Structure And Flavour Tagging In The Bπ± System Using Fully Reconstructed B Decays, Barate, R.; Et Al., M. Thulasidas

Research Collection School Of Computing and Information Systems

No abstract provided.

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Whatever Comes To Be Has A Cause Of Its Coming To Be: A Thomist Defense Of The Principle Of Sufficient Reason, Mark Nowacki Apr 1998

Whatever Comes To Be Has A Cause Of Its Coming To Be: A Thomist Defense Of The Principle Of Sufficient Reason, Mark Nowacki

Research Collection School of Social Sciences

No abstract provided.

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Measurement Of The W Mass By Direct Reconstruction In E+E- Collisions At 172 Gev, Barate, R.; Et Al., M. Thulasidas Mar 1998

Measurement Of The W Mass By Direct Reconstruction In E+E- Collisions At 172 Gev, Barate, R.; Et Al., M. Thulasidas

Research Collection School Of Computing and Information Systems

No abstract provided.

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Measurement Of Triple Gauge-Boson Couplings At 172 Gev, Barate, R.; Et Al, M. Thulasidas Mar 1998

Measurement Of Triple Gauge-Boson Couplings At 172 Gev, Barate, R.; Et Al, M. Thulasidas

Research Collection School Of Computing and Information Systems

The triple gauge-boson couplings, αWΦ, αW and αBΦ, have been measured using 34 semileptonically and 54 hadronically decaying W+W− candidate events. The events were selected in the data recorded during 1996 with the ALEPH detector at 172 GeV, corresponding to an integrated luminosity of 10.65 pb−1. The triple gauge-boson couplings have been measured using optimal observables constructed from kinematic information of W+W− events. The results are in agreement with the Standard Model expectation.

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Four-Jet Final State Production In E+E- Collisions At Centre-Of-Mass Energies Ranging From 130 To 184 Gev, R. Barate, Manoj Thulasidas Feb 1998

Four-Jet Final State Production In E+E- Collisions At Centre-Of-Mass Energies Ranging From 130 To 184 Gev, R. Barate, Manoj Thulasidas

Research Collection School Of Computing and Information Systems

The four jet topology is analysed in the ALEPH data taken between November 1995 and October 1997, at centre-of-mass energies ranging from 130 to 184 GeV. While an unexpected accumulation of events with a dijet mass sum around 105 GeV/c 2 had been observed during the first run in 1995 at 130/136 GeV, corresponding to an integrated luminosity of 5.7 pb1 , no significant dierences between data and standard model prediction is seen, either in the high energy runs (81.1 pb1 taken at centre-of-mass energies from 161 to 184 GeV) or in the 7.1 pb1 recorded during a new short …

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A Signcryption Scheme With Signature Directly Verifiable By Public Key, Feng Bao, Robert H. Deng Feb 1998

A Signcryption Scheme With Signature Directly Verifiable By Public Key, Feng Bao, Robert H. Deng

Research Collection School Of Computing and Information Systems

Signcryption, first proposed by Zheng, is a cryptographic primitive which combines both the functions of digital signature and public key encryption in a logical single step, and with a computational cost significantly lower than that needed by the traditional signature-then-encryption approach. In Zheng's scheme, the signature verification can be done either by the recipient directly (using his private key) or by engaging a zero-knowledge interative protocol with a third party, without disclosing recipient's private key. In this note, we modify Zheng's scheme so that the recipient's private key is no longer needed in signature verification. The computational cost of the …

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A Visual Object-Relationship Query Language For User-Database Interaction, Keng Siau Feb 1998

A Visual Object-Relationship Query Language For User-Database Interaction, Keng Siau

Research Collection School Of Computing and Information Systems

User–database interaction has a direct and immediate effect on the effectiveness and efficiency of database end users. Traditional query languages like SQL and QBE require end users to understand the underlying data structure in the database. This is a burden on end users, especially novice end users who have little technical knowledge or understanding of database. To alleviate the need for end users to know the logical database organization, this paper proposes the use of an object–relationship (OR) model and a formal high-level visual query language as the interface. Using this interface, end users communicate only domain knowledge with the …

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Search For Supersymmetry With A Dominant R-Parity Violating Llē Coupling In E+E- Collisions At Centre-Of-Mass Energies Of 130 Gev To 172 Gev, R. Barate, M. Thulasidas Jan 1998

Search For Supersymmetry With A Dominant R-Parity Violating Llē Coupling In E+E- Collisions At Centre-Of-Mass Energies Of 130 Gev To 172 Gev, R. Barate, M. Thulasidas

Research Collection School Of Computing and Information Systems

A search for pair-production of supersymmetric particles under the assumption that R-parity is violated via a dominant LLE¯LLE¯ coupling has been performed using the data collected by ALEPH at centre-of-mass energies of 130–172 GeV. The observed candidate events in the data are in agreement with the Standard Model expectation. This is translated into lower limits on the mass of charginos, neutralinos, sleptons, sneutrinos and squarks. For instance, charginos with masses less than 73 GeV/c2c2 and neutralinos with masses less than 23 GeV/c2c2 are excluded at 95% confidence level for any generation structure of the LLE¯LLE¯ coupling, and for neutralino, slepton …

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Measurement Of The Axial-Vector Τ Spectral Functions And Determination Of Αs (M2Τ) From Hadronic Τ Decays, R. Barate, M. Thulasidas Jan 1998

Measurement Of The Axial-Vector Τ Spectral Functions And Determination Of Αs (M2Τ) From Hadronic Τ Decays, R. Barate, M. Thulasidas

Research Collection School Of Computing and Information Systems

An analysis based on 124 000 selected ττ pairs recorded by the ALEPH detector at LEP provides the vector (V)(V) and axial-vector (A)(A) spectral functions of hadronic ττ decays together with their total widths. This allows the evaluation of finite energy chiral sum rules that are weighted integrals over the (V−A)(V−A) spectral functions. In addition, a precise measurement of αsαs along with a determination of nonperturbative contributions at the ττ mass scale is performed. The experimentally and theoretically most robust determination of αs(M2τ)αs(Mτ2) is obtained from the (V+A)(V+A) fit that yields αs(M2τ)=0.334±0.022αs(Mτ2)=0.334±0.022 giving αs(M2Z)=0.1202±0.0027αs(MZ2)=0.1202±0.0027 after the extrapolation to the mass …

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Search For Evidence Of Compositeness At Lep I, R. Barate, M. Thulasidas Jan 1998

Search For Evidence Of Compositeness At Lep I, R. Barate, M. Thulasidas

Research Collection School Of Computing and Information Systems

Extensive searches for evidence of compositeness of quarks and leptons have been made in the complete set of ALEPH data from LEP running at the Z peak. These include searches for radiative and weak decays of excited fermions, produced either in pairs or singly, and a scalar partner of the Z. Coupling and branching ratio limits deduced from these searches are presented.

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Measurement Of The Fraction Of Hadronic Z Decays Into Charm Quark Pairs, R. Barate, M. Thulasidas Jan 1998

Measurement Of The Fraction Of Hadronic Z Decays Into Charm Quark Pairs, R. Barate, M. Thulasidas

Research Collection School Of Computing and Information Systems

The full statistics of hadronic Z decays collected with the ALEPH detector are analysed to measure, by three methods, the ratio, RcRc, of the partial decay width of the Z into cc¯cc¯ quarks to the total hadronic width. One method uses the inclusive pp and p⊥p⊥ spectra of electrons. The other two use a double-tagging technique to measure RcRc independently of the charm-tagging efficiency. In one, the tagging procedure uses the reconstruction of high momentum charmed mesons (D∗+D∗+, D+D+ and \({\rm D^0}$) to detect the charm quarks. In the other, a charm quark is tagged from the D∗D∗'s reconstructed in …

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Searches For Charginos And Neutralinos In E+E- Collisions At √S = 161 And 172 Gev, R. Barate, M. Thulasidas Jan 1998

Searches For Charginos And Neutralinos In E+E- Collisions At √S = 161 And 172 Gev, R. Barate, M. Thulasidas

Research Collection School Of Computing and Information Systems

The data recorded by the ALEPH detector at centre-of-mass energies of 161, 170, and 172 GeV are analysed for signals of chargino and neutralino production. No evidence of a signal is found, although candidate events consistent with the expectations from Standard Model processes are observed. Limits at 95% C.L. on the production cross sections are derived and bounds on the parameters of the Minimal Supersymmetric Standard Model are set. The lower limit on the mass of the lightest ch is 85.5 GeV/c2GeV/c2 for gaugino-like charginos (μ=−500GeV/c2μ=−500GeV/c2), and 85.0 GeV/c2GeV/c2 for Higgsino-like charginos (M2=500GeV/c2M2=500GeV/c2), for heavy sneutrinos (Mν~≥200GeV/c2Mν~≥200GeV/c2) and tanβ=2–√tan⁡β=2. The …

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Study Of B0s Oscillations And Lifetime Using Fully Reconstructed D̄S Decays, R. Barate, M. Thulasidas Jan 1998

Study Of B0s Oscillations And Lifetime Using Fully Reconstructed D̄S Decays, R. Barate, M. Thulasidas

Research Collection School Of Computing and Information Systems

A search for B0sBs0 oscillations is performed using approximately 4 million Z→qq¯Z→qq¯ events collected by the ALEPH experiment during 1991–1995. B0sBs0 candidates are partially reconstructed by combining tracks with fully reconstructed D−sDs− candidates. The B0sBs0 production flavour is estimated from the sign of the opposite hemisphere charge, a fragmentation kaon in the same hemisphere, or a lepton in the opposite hemisphere. From a total sample of 1620 candidates, with a B0sBs0 purity estimated to be 22%, all values of ΔmsΔms below 3.9 ps−1−1 and between 6.5 and 8.8 ps−1−1 are excluded at 95% CL. From the same sample, the B0sBs0 …

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Evaluating Information Modeling Methods – A Review, Keng Siau, M. Rossi Jan 1998

Evaluating Information Modeling Methods – A Review, Keng Siau, M. Rossi

Research Collection School Of Computing and Information Systems

Hundreds of modeling methods are in existence today, yet practitioners and researchers are zealously “producing” new modeling methods. The “blooming” of modeling methods is not the problem; the lack of standardized techniques for evaluating them is. To further complicate the matter, most of the modeling methods are introduced based on common sense and intuition. Theoretical foundations and empirical evidence are severely lacking. With the current state of affairs, evaluation of modeling methods has become necessary. Comparing modeling methods provides us with the necessary knowledge and understanding on the strengths and weaknesses of each method. This knowledge can also guide us …

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The End Of Secrecy, Ann Florini Jan 1998

The End Of Secrecy, Ann Florini

Research Collection School of Social Sciences

Two standards of behavior are slugging it out around the world. Advocates of well-established norms such as corporate privacy and national sovereignty want to hide information from prying eyes, while promoters of transparency tout it as the solution to everything from international financial crises to arms races and street crime. Just what is transparency? Put simply, transparency is the opposite of secrecy. Secrecy means deliberately hiding your actions; transparency means deliberately revealing them. This element of volition makes the growing acceptance of transparency much more than a resigned surrender to the technologically facilitated intrusiveness of the Information Age. Transparency is …

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Comparing The Discourse Of Popular Politics In Korea And China: From Civil Society To Social Movements, William A. Callahan Jan 1998

Comparing The Discourse Of Popular Politics In Korea And China: From Civil Society To Social Movements, William A. Callahan

Research Collection School of Social Sciences

The Korea Journal’s series of articles addressing the question of civil society are a timely addition to the struggle over the discourse of democracy which is common to many countries in Pacific Asia. Since Professor Han Sang-Jin’s article does an excellent job of critically summarizing Chung Chulhee, Cho Hein and David Steinberg’s arti cles on Korean civil society, it seems that there is not much more to be said on the topic. To add to this discussion I will try to expand the discourse geographically and conceptually. Geographically, I will compare the discourse of popular politics in Korea with that …

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Creating The 'Right' Impression: Towards A Dramaturgy Of Management Consultancy, Timothy Adrian Robert Clark, Graeme Salaman Jan 1998

Creating The 'Right' Impression: Towards A Dramaturgy Of Management Consultancy, Timothy Adrian Robert Clark, Graeme Salaman

Research Collection Lee Kong Chian School Of Business

This article adopts a novel approach by examining the activities of management consultants in terms of the dramaturgical metaphor. This is a useful framework within which to illuminate their activities since a number of service characteristics combine to create a context within which the key task of management consultants is to convince clients of their quality and value. Impression management is therefore a core feature of consultancy work. In this sense management consultants are viewed as systems of persuasion creating compelling images which persuade clients of their quality and worth. This argument is illustrated with reference to the activities of …

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Liberalism And Multiculturalism: The Politics Of Indifference, Chandran Kukathas Jan 1998

Liberalism And Multiculturalism: The Politics Of Indifference, Chandran Kukathas

Research Collection School of Social Sciences

In modern societies, particularly the societies of the liberal democratic West, cultural diversity poses a challenge not only to the makers of government policy, but also to the philosopher looking to understand how it might be possible-in principle-for people of different ways to live together. The challenge is posed because society's institutions have been challenged, as the members of different groups have demanded "recognition." They have demanded not simply recognition of their claims to a (just) share of the social pie but, more important, recognition of their distinct identities as members of particular cultural communities within society. The persistence and, …

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The Ideology Of Miss Thailand In National, Consumerist And Transnational Space, William A. Callahan Jan 1998

The Ideology Of Miss Thailand In National, Consumerist And Transnational Space, William A. Callahan

Research Collection School of Social Sciences

Every morning at 8:00 a.m. (with flag-raising) and every evening at 6:00 P.M. (with flag lowering) the official symbolic identity of Thai- land is displayed - by state order - on television. These displays are a graphic daily reminder of how nationalism, the military, and the media are tightly bound together in Thailand. Though it seems like a timeless tradition of respect for essential national symbols, this tele- vized ritual is the result of a "revolutionary order" issued by the right-wing dictators who took power with the brutal October 6, 1976, massacre and military coup.1 These media productions are part …

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The New Singapore Law On Antidumping And Countervailing Duties, Locknie Hsu Jan 1998

The New Singapore Law On Antidumping And Countervailing Duties, Locknie Hsu

Research Collection Yong Pung How School Of Law

The Countervailing and Anti-dumping Duties Act 1996 ("the Act") came into effect on 1 November 1996.1 This legislation was enacted to bring Singapore's law in relation to countervailing duties, subsidies and antidumping into conformity with requirements of the World Trade Organization (WTO) Agreements It also updates the law by repealing the outmoded Customs (Subsidies and Anti-dumping) Act. The new rules and procedures in the Act are meant to "give added assurance and certainty to the local and foreign parties concerned whenever an action is instituted."In addition to the Act, detailed regulations have also been passed. The Act follows the basic …

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An Interlibrary Loan System On The World Wide Web, Schubert Shou Boon Foo, Ee Peng Lim Jan 1998

An Interlibrary Loan System On The World Wide Web, Schubert Shou Boon Foo, Ee Peng Lim

Research Collection School Of Computing and Information Systems

Inter-Library Loan (ILL) service is one of the services provided by libraries that offers users a way to access library resources beyond their affiliated libraries. Additionally, it allows participating libraries to share and maximize their resources. This work examines the ILL process used by libraries in Singapore and proposes that the existing paper-based manual system be replaced by a Web-based ILL system. Such a Web-based system has been successfully designed and implemented at the Nanyang Technological University. The paper presents an overview of the system requirements and architecture, implementation details and demonstrates the feasibility and advantages of the new system.

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An Integrated Web-Based Ill System For Singapore Libraries, Schubert Foo, Ee Peng Lim Jan 1998

An Integrated Web-Based Ill System For Singapore Libraries, Schubert Foo, Ee Peng Lim

Research Collection School Of Computing and Information Systems

The paper proposes an integrated Web-based inter-library loan (ILL) system to replace and enhance the existing manual-based ILL system used by Singapore libraries. It describes the system requirements that must be supported in order to make it a viable and acceptable solution to all participating libraries. Subsequently, it presents the client-server Web-based system architecture, database design and Java development platform that are used to implement the system. The new system exhibits a host of advantages over the manual system including the minimising of human resource by eliminating form-filling and other forms of paper work completely, improving the access and speed …

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Lee Kuan Yew And His Use Of Spatial-Orientational Metaphors, Siow Heng Ong Jan 1998

Lee Kuan Yew And His Use Of Spatial-Orientational Metaphors, Siow Heng Ong

Research Collection Lee Kong Chian School Of Business

The Prime Minister's message to the nation after Singapore separated from Malaysia was one of consolidation and moving ahead. This was not an easy task for the speaker as the year before Singapore separated from Malaysia, the race riots had claimed 34 lives.1 These riots were even more prolonged than the Hertogh riots of 1950. Maintaining racial harmony and social integration was an uphill task. The hope for consolidation and a united sense of nationhood seemed distant.

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