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Search For The Standard Model Higgs Boson In E+E- Collisions At √S = 161, 170 And 172 Gev, Barate, R.; Et Al., M. Thulasidas Oct 1997

Search For The Standard Model Higgs Boson In E+E- Collisions At √S = 161, 170 And 172 Gev, Barate, R.; Et Al., M. Thulasidas

Research Collection School Of Computing and Information Systems

The reaction e+ e ! HZ is used to search for the Standard Model Higgs boson. The data sample consists of integrated luminosities of 10:9 pb1 , 1:1 pb1 , and 9:5 pb1 collected by the ALEPH experiment at LEP during 1996, at centre-of-mass energies of 161, 170 and 172 GeV, respectively. No candidate events were found, in agreement with the expected background of 0.84 events from all Standard Model processes. This search results in a 95% C.L. lower limit on the Higgs boson mass of 69:4 GeV=c2 . When combined with earlier ALEPH searches performed at energies at and …

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Inclusive Decays B->Dx And B->D*X, L. Gibbons, Manoj Thulasidas Oct 1997

Inclusive Decays B->Dx And B->D*X, L. Gibbons, Manoj Thulasidas

Research Collection School Of Computing and Information Systems

We report new measurements of the differential and total branching ratios for inclusive B decay to D-0, D+, and D*+ and the first measurement of the same quantities for inclusive B decay to D-*0. Here B is the mixture of B-d and B-u from Y(4S) decay. Furthermore, since more than one charm particle (or antiparticle) of the same kind can be produced in B decay, here ''inclusive B branching ratio'' is used to mean the average number of charm particles and their antiparticles of a certain species: produced in B decay. We obtain the following results (the first error is …

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Search For Sleptons In E+E- Collisions At Centre-Of-Mass Energies Of 161 Gev And 172 Gev, R. Barate, Manoj Thulasidas Sep 1997

Search For Sleptons In E+E- Collisions At Centre-Of-Mass Energies Of 161 Gev And 172 Gev, R. Barate, Manoj Thulasidas

Research Collection School Of Computing and Information Systems

The data recorded by the ALEPH experiment at LEP at centre–of–mass energies of 161 GeV and 172 GeV were analysed to search for sleptons, the supersymmetric partners of leptons. No evidence for the production of these particles was found. The number of candidates observed is consistent with the background expected from four–fermion processes and γγ–interactions. Improved mass limits at 95% C.L. are reported.

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Revamping The Law Tutorial, Nadja Alexander, Ann Black Sep 1997

Revamping The Law Tutorial, Nadja Alexander, Ann Black

Research Collection Yong Pung How School Of Law

The lecture/tutorial format is the dominant structurethrough which law is taught in Australia. This articleexamines the learning environment of the law tutorial, andsuggests approaches aimed at maximising the learningexperience for students, on the basis of students’ learningpreferences. The discussion utilises Golay’s learningpattern assessment in developing an understanding of thedifferent learning styles of students. Based on thisanalysis, activities are advanced which advocate andimplement joint tutor-student responsibility for learningwithin tutorials. It is argued that students will learn moreeffectively, and expand their learning experiences wheninvolved directly in the structure, format and content ofthe tutorial itself.

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A Measurement Of The Qcd Colour Factors And A Limit On The Light Gluino, Barate, R.; Et Al., M. Thulasidas Sep 1997

A Measurement Of The Qcd Colour Factors And A Limit On The Light Gluino, Barate, R.; Et Al., M. Thulasidas

Research Collection School Of Computing and Information Systems

Using data collected from 1992 to 1995 with the ALEPH detector at LEP, a measurement of the colour factor ratios CA/CF and TF /CF and the strong coupling constant αs = CFαs(MZ)/(2π) has been performed by fitting theoretical predictions simultaneously to the measured differential two-jet rate and angular distributions in four-jet events. The result is found to be in excellent agreement with QCD, {fx4-1} Fixing CA/CF and TF/CF to the QCD values permits a determination of αs(MZ) and ηf, the number of active flavours. With this measurement the existence of a gluino with mass below 6.3 GeV/c2 is excluded at …

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Multiple Representation For Understanding Data Structures, Biffah Hancies, Venky Shankararaman, Jose Munoz Aug 1997

Multiple Representation For Understanding Data Structures, Biffah Hancies, Venky Shankararaman, Jose Munoz

Research Collection School Of Computing and Information Systems

In this paper an approach to enhance the learning of abstract computing concepts by novice students is presented. This approach is based on effective use of multiple visual representations, and it was applied within the domain of linear data structures: array, stack, queue and linked list. A prototype computer-based instructional system called MRUDS (Multiple Representation for Understanding Data Structures) was developed and evaluated. It was found from the evaluation that the three presentation modules namely, analogy, representation and algorithm contributed to the students' learning process, each contributing to and reinforcing the effect of the others.

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Using Expert Support And Its Explanation Facilities For Group Decision Making, Fiona Fui-Hoon Nah, Izak Benbasat Aug 1997

Using Expert Support And Its Explanation Facilities For Group Decision Making, Fiona Fui-Hoon Nah, Izak Benbasat

Research Collection School Of Computing and Information Systems

As information technology is increasingly used to support group work, it becomes desirable to identify the types of computer-based decision aids that are beneficial for supporting group decision making. In a review of the decision support literature, Benbasat, DeSanctis and Nault (1993) point out the lack of empirical research in examining the use of expert support for group decision making. In our review of the literature in this respect, we identified only one case study (Sviokla, 1989), which examined the processes involved in the pre- and post-use of an expert support system (ESS) called PlanPower by a group of financial …

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A New Role For Transparency, Ann Florini Aug 1997

A New Role For Transparency, Ann Florini

Research Collection School of Social Sciences

Arms control has traditionally dealt with limiting the means of destruction. When the greatest threa to security came from the potential for organized violence inflicted by an external enemy against a state, arms control logically sought to limit that danger. But as the threats to security have become more diffuse, policy-makers will need to draw on a wider repertoire of tools to reduce the potential destructiveness of less organiized threats, and even emerging unintended dangers. The article examines the problems of nuclear proliferation and environmental toxification over the long term, describes why these problems will require a transparency-based approach, and …

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Theoretical Foundation For Relationship Construct In Information Modeling – Relation Element Theory, Keng Siau Aug 1997

Theoretical Foundation For Relationship Construct In Information Modeling – Relation Element Theory, Keng Siau

Research Collection School Of Computing and Information Systems

Information modeling is a critical process in software development. One of the key constructs in information modeling is the relationship construct. Though commonly used, the relationship construct is poorly defined and lacks a strong theoretical foundation. The objectives of this research are to define and classify the various relationships based on a theory in linguistic known as the relation element theory. This paper describes the theory, relates the theory to the relationship construct, and discusses the implication of the theory on the relationship construct.

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Influence And Consensus In Group Decision Making Environment, Fiona Fui-Hoon Nah, Byungcho Kim Aug 1997

Influence And Consensus In Group Decision Making Environment, Fiona Fui-Hoon Nah, Byungcho Kim

Research Collection School Of Computing and Information Systems

In this research, the effect of expert support on influence and consensus in group decision making is investigated. The results indicate that ESS support diminishes the group members' influence on the group judgment as well as the influence exerted by the most influential group member. On the other hand, explanations support provided by ESS increases consensus in group decision making.

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Measurement Of The Transverse Spin Correlations In The Decay Z → Τ+Τ-, Barate, R.; Et Al., M. Thulasidas Jul 1997

Measurement Of The Transverse Spin Correlations In The Decay Z → Τ+Τ-, Barate, R.; Et Al., M. Thulasidas

Research Collection School Of Computing and Information Systems

A measurement of the transverse-transverse, CTT, and transverse-normal CTN, τ spin correlations in the decay Z0 → τ+ τ− is presented based on the aplanarity angle of the decay products of both taus. Based on 80 pb−1 of data collected by ALEPH[1] in 1992, 1993 and 1994 on the peak of the Z resonance, the results are: CTT = 1.00 ± 0.14(stat) ± 0.04(syst), CTN =−0.08 ± 0.14(stat) ± 0.02(syst). These values are in agreement with the Standard Model predictions, CTT = 0.989 and CTN = 0.

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Report On The 5th Ifip International Workshop On Quality Of Service, Oguz Angin, Andrew T. Campbell, Lai Tee Cheok, Raymond Liao, Koon-Seng Lim, Klara Nahrstedt Jul 1997

Report On The 5th Ifip International Workshop On Quality Of Service, Oguz Angin, Andrew T. Campbell, Lai Tee Cheok, Raymond Liao, Koon-Seng Lim, Klara Nahrstedt

Research Collection School Of Computing and Information Systems

This paper presents a summary of the fifth International Workshop on Quality of Service (IWQOS) which was held at Columbia University in May 1997. The goal of this three-day meeting was to foster interaction between researchers active in the area of Quality of Service(QOS) research, to reflect on past experiences and lessons learnt, and to discuss future QOS challenges. To reflect this goal, this year's workshop included a hot program made up of (i) a keynote address on "Programming Telecommunications Networks"; (ii) panels addressing "QOS for Distributed Object Computing Middleware --- Fact or Fiction?" and "Reservations about Reservations"; (iii) a …

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Entrepreneurship On The Threshold Of 21st Century, Wee Liang Tan Jun 1997

Entrepreneurship On The Threshold Of 21st Century, Wee Liang Tan

Research Collection Lee Kong Chian School Of Business

With this issue we would have joined the world in watching Hong Kong, reknown as an entrepreneurial economy, move across the threshold to mainland Chinese control. In Hong Kong, entrepreneurship moves across a threshold to another environment the conditions of which may be different. There are opposing views whether the situation will be restrictive to entrepreneurship. Entrepreneurs operating in Hong Kong would have made alternative plans and strategies. Only time will tell how the events will unfold, suffice to be prepared for the transition is far better than not to have been.

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Search For The Bc Meson In Hadronic Z Decays, R. Barate, Manoj Thulasidas Jun 1997

Search For The Bc Meson In Hadronic Z Decays, R. Barate, Manoj Thulasidas

Research Collection School Of Computing and Information Systems

A search for the Bc meson decaying into the channels Jψπ+ and Jψℓ+νℓ (ℓ = e or μ) is performed in a sample of 3.9 million hadronic Z decays collected by the ALEPH detector. This search results in the observation of 0 and 2 candidates in each of these channels, respectively, while 0.44 and 0.81 background events are expected. The following 90% confidence level upper limits are derived:Br(Z→BcXBr(Z→qq̄Br(Bc+→Jψπ+)

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From Manual To Electronic Road Congestion Pricing: The Singapore Experience And Experiment, Sock-Yong Phang, Rex S. Toh Jun 1997

From Manual To Electronic Road Congestion Pricing: The Singapore Experience And Experiment, Sock-Yong Phang, Rex S. Toh

Research Collection School Of Economics

This study reviews the efforts of Singapore to curb road congestion through restraints on motor vehicle ownership as well as user fees. In particular, it traces the history of the famous Area Licensing Scheme (ALS), and then discusses its shortcomings, also the need for Electronic Road Pricing (ERP), its advantages and disadvantages and the technology involved in this state of the art system. This paper identifies important research questions to be addressed in connection with the first full-scale adoption of ERP.

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Measurement Of The Branching Fraction For D0 → K-Π+, R. Barate, M. Thulasidas Jun 1997

Measurement Of The Branching Fraction For D0 → K-Π+, R. Barate, M. Thulasidas

Research Collection School Of Computing and Information Systems

The branching fraction for D0 → K−π+ is measured with the statistics collected by ALEPH from 1991 to 1994. The method is based on the comparison between the rate for the reconstructed D∗+→ D0π+, D0 → K−π+ decay chain and the rate for inclusive soft pion production at low transverse momentum with respect to the nearest jet. The result is B(D0 → K−π+0 = (3.90 ± 0.09 ± 0.12)%

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Study Of Muon-Pair Production At Centre-Of-Mass Energies From 20 To 136 Gev With The Aleph Detector, R. Barate, M. Thulasidas May 1997

Study Of Muon-Pair Production At Centre-Of-Mass Energies From 20 To 136 Gev With The Aleph Detector, R. Barate, M. Thulasidas

Research Collection School Of Computing and Information Systems

The total cross section and the forward-backward asymmetry for the process e+e− → μ+μ−(nγ) are measured in the energy range 20–136 GeV by reconstructing the effective centre-of-mass energy after initial state radiation. The analysis is based on the data recorded with the ALEPH detector at LEP between 1990 and 1995, corresponding to a total integrated luminosity of 143.5 pb−1. Two different approaches are used: in the first one an exclusive selection of events with hard initial state radiation in the energy range 20–88 GeV is directly compared with the Standard Model predictions showing good agreement. In the second one, all …

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A Measurement Of Rb Using Mutually Exclusive Tags, R. Barate, Manoj Thulasidas May 1997

A Measurement Of Rb Using Mutually Exclusive Tags, R. Barate, Manoj Thulasidas

Research Collection School Of Computing and Information Systems

A measurement of Rb using ve mutually exclusive hemisphere tags has been performed by ALEPH using the full LEP1 statistics. Three tags are designed to select the decay of the Z0 to b quarks, while the remaining two select Z0 decays to c and light quarks, and are used to measure the tagging eciencies. The result, Rb = 0:2159 0:0009(stat) 0:0011(syst), is in agreement with the electroweak theory prediction of 0:21580:0003.

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Source-Aware Multidatabase Query Processing, Ee Peng Lim, Yinyan Cao, Roger Hsiang-Li Chiang May 1997

Source-Aware Multidatabase Query Processing, Ee Peng Lim, Yinyan Cao, Roger Hsiang-Li Chiang

Research Collection School Of Computing and Information Systems

We introduce a multidatabase model to represent the information that derives from different local databases. This model, known as Tuple-Source (TS) relational model, accommodates tuples from different local databases by attaching them with their source information in the global relations which are also known as TS-relations. In other words, a source attribute is implicit in every TS-relation. To manipulate the global relations, we have developed the TSSQL query language and implemented a distributed query processor to process such queries. In this paper, we report our distributed query processing architecture and algorithms. Our architecture consists of a query mediator and a …

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A Measurement Of Rb Using A Lifetime-Mass Tag, R. Barate, Manoj Thulasidas May 1997

A Measurement Of Rb Using A Lifetime-Mass Tag, R. Barate, Manoj Thulasidas

Research Collection School Of Computing and Information Systems

ALEPH's published measurement of Rb = Γ(Ζ → bb̄)/Γ(Ζ → hadrons) using a lifetime tag is updated using the full LEP 1 data sample. Considerable effort has been devoted to understanding systematic effects. Charm background is better controlled by combining the lifetime tag with a tag based on the b/c hadron mass difference. Furthermore, the algorithm used to reconstruct the event primary vertex is designed so as to reduce correlations between the two hemispheres of an event. The value of Rb is measured to be 0.2167 ± 0.0011 (stat) ± 0.0013 (syst).

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Popular Music In A Transnational World: The Construction Of Local Identities In Singapore, Lily Kong Apr 1997

Popular Music In A Transnational World: The Construction Of Local Identities In Singapore, 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. In this paper, I focus on one arena which geographers can develop in their analysis of popular music, namely, the exploration of local influences and global forces in the production of music. In so doing, I wish to explore how local resources intersect with global ones in a process of transculturation. Using the example of English songs by one particular songwriter and artiste …

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Distributed Query Processing For Structured And Bibliographic Databases, Ee Peng Lim, Ying Lu Apr 1997

Distributed Query Processing For Structured And Bibliographic Databases, Ee Peng Lim, Ying Lu

Research Collection School Of Computing and Information Systems

To support future digital library systems which draw information from different sources on the internet, we have to provide integrated queries to pre-existing database servers which contain structured, semi-structured and unstructured data. In this paper, we specifically examine the problem of querying both existing structured relational databases and bibliographic databases. By adopting the well-accepted Z39.50 standard protocol to access bibliographic databases in different legacy library systems, we have developed an extended SQL model, known as HarpSQL, to support integrated queries to both SQL databases and bibliographic databases. Using HarpSQL, one can not only query bibliographic databases in an SQL manner, …

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A New On-Line Cash Check Scheme, Robert H. Deng, Yongfei Han, Albert B. Jeng, Teow-Hin Ngair Apr 1997

A New On-Line Cash Check Scheme, Robert H. Deng, Yongfei Han, Albert B. Jeng, Teow-Hin Ngair

Research Collection School Of Computing and Information Systems

This paper presents a new on-line cash check scheme which guarantees payor anonymity and improves upon existing similar schemes in efficiency and security.

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Rules For References: Suggested Guidelines For Choosing Literature Citations For Research Articles In Applied Psychology, Michael A. Campion, Carl P. Maertz, David K. Palmer, Hwee Hoon Tan Mar 1997

Rules For References: Suggested Guidelines For Choosing Literature Citations For Research Articles In Applied Psychology, Michael A. Campion, Carl P. Maertz, David K. Palmer, Hwee Hoon Tan

Research Collection Lee Kong Chian School Of Business

A survey was conducted of reviewers' opinions of the proper rules for when and how references should be used to support points made in research articles in applied psychology and related fields. The reviewers opinions were distilled into a set of rules or guidelines for proper referencing in research articles. These rules are presented.

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A Variance Decomposition Analysis Of The Information In The Term Structure, Louis H. Ederington, Jeremy C. Goh Mar 1997

A Variance Decomposition Analysis Of The Information In The Term Structure, Louis H. Ederington, Jeremy C. Goh

Research Collection Lee Kong Chian School Of Business

Based on a market efficiency assumption, we use variance decomposition analysis is to separate information in the term structure on expected future spot rates from information on time-varying term premia and to examine the market's ability to forecast both future rate changes and excess returns on long versus short securities. We find that fluctuations in the slope of the yield curve are due more to changing term premia than to fluctuations in expected future spot rates and that the market correctly predicts about 40 percent of the month-to-month changes in spot rates, a considerably higher percentage than that found by …

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Making Sense Of The Asian Success Story: An Integrative Framework, Chow Hou Wee, Gilbert Tan Mar 1997

Making Sense Of The Asian Success Story: An Integrative Framework, Chow Hou Wee, Gilbert Tan

Research Collection Lee Kong Chian School Of Business

The article focuses on Asian countries that have experienced economic growth over the past 50 years including Hong Kong, China; Japan; Singapore; South Korea and Taiwan. With the exception of Hong Kong, the economic success of the Asian countries has been attributed to the interventionist framework. Export-orientation is one strategy that is most associated with the success of the five Asian countries. The export-oriented strategy helped the five Asian countries in many ways. The ensuring growth of employment enabled the country to save and accumulate capital for reinvestment. The export-oriented strategy also positively affects the competitive advantages of the country. …

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Public Housing In Singapore: Interpreting 'Quality' In The 1990s, Siew Eng Teo, Lily Kong Mar 1997

Public Housing In Singapore: Interpreting 'Quality' In The 1990s, Siew Eng Teo, Lily Kong

Research Collection School of Social Sciences

While writings exist on various aspects of public housing in Singapore, recent developments in the 1990s have not yet been given any serious academic attention, Our intention in this paper is to focus on such developments, paying particular attention to the government's policy of providing quality housing, After setting the context of efforts at providing quality in the first three decades of public housing by the Housing and Development Board, we turn our attention specifically to the 1990s, focusing on three areas in which attempts are being made to improve quality, namely, the physical upgrading of older estates, the privatisation …

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The Construction Of National Identity Through The Production Of Ritual And Spectacle: An Analysis Of National Day Parades In Singapore, Lily Kong, Brenda S. A. Yeoh Mar 1997

The Construction Of National Identity Through The Production Of Ritual And Spectacle: An Analysis Of National Day Parades In Singapore, Lily Kong, Brenda S. A. Yeoh

Research Collection School of Social Sciences

In this paper, we adopt the view that 'nation' and 'national identity' are social constructions, created to serve ideological ends. We discuss this in the specific empirical context of Singapore's National Day parades. By drawing on officially produced souvenir programmes and magazines, newspaper reports, and interviews with participants and spectators, we analyse the parades between 1965 and 1994, showing how, as an annual ritual and landscape spectacle, the parades succeed to a large extent in creating a sense of awe, wonderment and admiration. Discussion focuses on four aspects of the celebrations: the site of the parades, their display and theatricality, …

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A System For Query Comprehension, Hock Chuan Chan, Kwok Kee Wei, Keng Siau Mar 1997

A System For Query Comprehension, Hock Chuan Chan, Kwok Kee Wei, Keng Siau

Research Collection School Of Computing and Information Systems

A major difficulty of query writing is that users do not fully understand queries. A system providing feedback is proposed so as to enable users to better understand their queries. It is a multi-functional rule-based system. In addition to providing an English translation for the query, it pin-points syntax errors, and suggests possible solutions. It also finds likely semantic errors, and provides possible solutions. The system was implemented for a query language based on the entity relationship model. It is expected to lead to better user performance. Empirical testing showed significant improvement in user performance with the feedback system. The …

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Cascade Artmap: Integrating Neural Computation And Symbolic Knowledge Processing, Ah-Hwee Tan Mar 1997

Cascade Artmap: Integrating Neural Computation And Symbolic Knowledge Processing, Ah-Hwee Tan

Research Collection School Of Computing and Information Systems

This paper introduces a hybrid system termed cascade adaptive resonance theory mapping (ARTMAP) that incorporates symbolic knowledge into neural-network learning and recognition. Cascade ARTMAP, a generalization of fuzzy ARTMAP, represents intermediate attributes and rule cascades of rule-based knowledge explicitly and performs multistep inferencing. A rule insertion algorithm translates if-then symbolic rules into cascade ARTMAP architecture. Besides that initializing networks with prior knowledge can improve predictive accuracy and learning efficiency, the inserted symbolic knowledge can be refined and enhanced by the cascade ARTMAP learning algorithm. By preserving symbolic rule form during learning, the rules extracted from cascade ARTMAP can be compared …

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