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Articles 8401 - 8430 of 8668
Full-Text Articles in Entire DC Network
Scalar Quark Searches In E+E- Collisions At √S = 181 - 184 Gev, Barate, R.; Et Al., M. Thulasidas
Scalar Quark Searches In E+E- Collisions At √S = 181 - 184 Gev, Barate, R.; Et Al., M. Thulasidas
Research Collection School Of Computing and Information Systems
Searches for scalar top, scalar bottom and degenerate scalar quarks have been performed with data collected with the ALEPH detector at LEP. The data sample consists of 57 pb−1 taken at s = 181–184 GeV. No evidence for scalar top, scalar bottom or degenerate scalar quarks was found in the channels t̃→cχ, t̃→bℓν̃, b̃→bχ, and q̃→qχ. From the channel t̃→cχ a limit of 74 GeV/c2has been set on the scalar top quark mass, independent of the mixing angle. This limit assumes a mass difference between the t̃ and the χ in the range 10–40 GeV/c2. From the channel t̃→bℓν̃ the …
Method Engineering For Web Information Systems Development: Challenges And Issues, Keng Siau
Method Engineering For Web Information Systems Development: Challenges And Issues, Keng Siau
Research Collection School Of Computing and Information Systems
Despite the rapid advancement of technology in the last few decades, accurate, on-time, and on-budget completion of information systems development projects is still a vision rather than a reality. The software crisis is still very much alive almost forty years after it was first defined. The sudden popularity of Internet and electronic commerce pose a new challenge to the software engineering community. With the increasing importance of electronic commerce and $3 billion in sales expected to take place over cyberspace by the year 2000, organizations will be competing to design and develop web-based applications. However, existing information modeling methods might …
Factors Which Improve The Construct Validity Of Assessment Centers: A Review, Filip Lievens
Factors Which Improve The Construct Validity Of Assessment Centers: A Review, Filip Lievens
Research Collection Lee Kong Chian School Of Business
This article reviews 21 studies which manipulated specific variables to determine their impact on the construct validity of assessment centers. This review shows that the studies regarding the impact of different observation, evaluation, and integration procedures yielded mixed results. Conversely, dimension factors (number, conceptual distinctiveness, and transparency), assessor factors (type of assessor and type of assessor training), and exercise factors (exercise form and use of role-players) were found to moderate construct validity. On the basis of the review, practical recommendations are derived to maximize the probability that practitioners design and administer an assessment center with construct validity. Finally, new perspectives …
A Measurement Of The Inclusive B → Sγ Branching Ratio, R. Barate, Manoj Thulasidas
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
Manufacturing Operations In Europe: Where Do We Go Next?, Arnoud De Meyer
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 …
Querying Structured Web Resources, Ee Peng Lim, Cheng Hai Tan, Boon Wan Lim, Wee-Keong Ng
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 …
Interdependence, Punitive Capability, And The Reciprocation Of Punitive Actions In Channel Relationships, Nirmalya Kumar, Lisa K. Scheer, Jan-Benedict E. M. Steenkamp
Interdependence, Punitive Capability, And The Reciprocation Of Punitive Actions In Channel Relationships, Nirmalya Kumar, Lisa K. Scheer, Jan-Benedict E. M. Steenkamp
Research Collection Lee Kong Chian School Of Business
Using data from automobile dealers in the Netherlands, the authors find that dealers' punitive actions toward their key suppliers are affected by their perceptions of their own and their supplier's interdependence and punitive capabilities, as well as by the supplier's punitive actions. Punitive actions are affected by interdependence, but a more complete picture is achieved by also examining punitive capability. The authors test hypotheses based on bilateral deterrence, conflict spiral, and relative power theories, but none of these comprehensively explains the effects of both total power and power asymmetry. Dealer punitive actions are inhibited as total interdependence increases, but are …
Resonant Structure And Flavour Tagging In The Bπ± System Using Fully Reconstructed B Decays, Barate, R.; Et Al., M. Thulasidas
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.
Functional Relations Among Constructs In The Same Content Domain At Different Levels Of Analysis: A Typology Of Composition Models, David Chan
Research Collection School of Social Sciences
Composition models specify the functional relationships among phenomena or constructs at different levels of analysis (e.g., individual level, team level, organizational level) that reference essentially the same content but that are qualitatively different at different levels (M. T. Hannan, 1971, K. H. Roberts, C. L. Hulin, & D. M. Rousseau, 1978, D. M. Rousseau, 1985). Specifying adequate composition models is a critical component of good multilevel research. A typology of composition models is proposed to provide a framework for organizing, evaluating, and developing constructs and theories in multilevel research. Five basic forms of composition are described and illustrated. Implications of …
Measurement Of The W Mass By Direct Reconstruction In E+E- Collisions At 172 Gev, Barate, R.; Et Al., M. Thulasidas
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.
Refocusing On Qualitative Methods: Problems And Prospects For Research In A Specific Asian Context, Lily Kong
Refocusing On Qualitative Methods: Problems And Prospects For Research In A Specific Asian Context, Lily Kong
Research Collection School of Social Sciences
A recent issue of Area (1996, Volume 28.2) devoted space to six papers on focus groups, attesting to their increasing importance as a means of obtaining qualitative data. The papers provided interesting insights into the use of focus groups in specific research and cultural contexts, and raised three main issues in my mind. The first is a continuing misunderstanding as to the nature of knowledge, which surfaces in discussions of, and approaches to, the use of qualitative methods such as focus groups. The second is the range of related techniques that are actually involved in the qualitative method, known as …
Measurement Of Triple Gauge-Boson Couplings At 172 Gev, Barate, R.; Et Al, M. Thulasidas
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.
A Visual Object-Relationship Query Language For User-Database Interaction, Keng Siau
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 …
Search For Evidence Of Compositeness At Lep I, R. Barate, M. Thulasidas
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.
An Upper Limit On The Τ Neutrino Mass From Three- And Five-Prong Tau Decays, R. Barate, M. Thulasidas
An Upper Limit On The Τ Neutrino Mass From Three- And Five-Prong Tau Decays, R. Barate, M. Thulasidas
Research Collection School Of Computing and Information Systems
A bound on the tau neutrino mass is established using the data collected from 1991 to 1995 at s√≃mZ with the ALEPH detector. Two separate limits are derived by fitting the distribution of visible energy vs invariant mass in τ−→2π−π+ντ and τ−→3π−2π+(π0)ντ decays. The two results are combined to obtain a 95% confidence level upper limit of 18.2 MeV/c2 on the mass of the tau neutrino.
Observation Of Doubly-Charmed B Decays At Lep, R. Barate, M. Thulasidas
Observation Of Doubly-Charmed B Decays At Lep, R. Barate, M. Thulasidas
Research Collection School Of Computing and Information Systems
A search for doubly-charmed B decays with both charmed mesons reconstructed is performed, using about 3.8 million hadronic Z decays recorded with the ALEPH detector at LEP. A clear signal is observed in the channels B→DsD¯(X)B→DsD¯(X) and B→DD¯(X)B→DD¯(X) (where D can be either a D00, a D++ or a D∗+∗+), providing the first direct evidence for doubly-charmed B decays involving no DsDs production. Evidence for associated K0SKS0 and K±K± production in the decays B→DD¯(X)B→DD¯(X) is also presented and some candidates for completely reconstructed decays B→DsD¯(nπ)B→DsD¯(nπ), B→DD¯K0SB→DD¯KS0 and B→DD¯K±B→DD¯K± are observed. Furthermore, candidates for the two-body Cabibbo suppressed decays B0→D∗−D∗+B0→D∗−D∗+ and …
Searches For Charginos And Neutralinos In E+E- Collisions At √S = 161 And 172 Gev, R. Barate, M. Thulasidas
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–√tanβ=2. The …
Study Of B0s Oscillations And Lifetime Using Fully Reconstructed D̄S Decays, R. Barate, M. Thulasidas
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 …
The End Of Secrecy, Ann Florini
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 …
Studies Of Quantum Chromodynamics With The Aleph Detector, R. Barate, M. Thulasidas
Studies Of Quantum Chromodynamics With The Aleph Detector, R. Barate, M. Thulasidas
Research Collection School Of Computing and Information Systems
No abstract provided.
Evaluation Of Information Modeling Methods: A Review, Keng Siau, Matti Rossi
Evaluation Of Information Modeling Methods: A Review, Keng Siau, Matti 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 standardize 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 …
Liberalism And Multiculturalism: The Politics Of Indifference, Chandran Kukathas
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, …
Book Review: Taoism Under The T'Ang: Religion And Empire During The Golden Age Of Chinese History By T. H. Barrett, Alan Kam Leung Chan
Book Review: Taoism Under The T'Ang: Religion And Empire During The Golden Age Of Chinese History By T. H. Barrett, Alan Kam Leung Chan
Research Collection College of Integrative Studies
To those who are interested in learning about (1) the language and inter- pretation of emotion in South and East Asian thought, (2) the philosoph- ical debates surrounding the nature and ethics of emotion, and (3) ways of doing comparative philosophy, Emotions in Asian Thought, edited by Joel Marks and Roger T. Ames, will not disappoint. Individually, the twelve essays collected here display considerable erudition and/or philosophical rigor.
Comparing The Discourse Of Popular Politics In Korea And China: From Civil Society To Social Movements, William A. Callahan
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 …
Evaluating Information Modeling Methods – A Review, Keng Siau, M. Rossi
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 …
Measurement Of The Axial-Vector Τ Spectral Functions And Determination Of Αs (M2Τ) From Hadronic Τ Decays, R. Barate, M. Thulasidas
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 …
An Interlibrary Loan System On The World Wide Web, Schubert Shou Boon Foo, Ee Peng Lim
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.
An Integrated Web-Based Ill System For Singapore Libraries, Schubert Foo, Ee Peng Lim
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 …
Inclusive Production Of Neutral Pions In Hadronic Z Decays, R. Barate, M. Thulasidas
Inclusive Production Of Neutral Pions In Hadronic Z Decays, R. Barate, M. Thulasidas
Research Collection School Of Computing and Information Systems
A measurement of the inclusive production of π0 mesons in hadronic Z decays is presented and compared to Monte Carlo model predictions. The analysis is based on approximately 2 million hadronic events recorded with the ALEPH detector at LEP at a centre-of-mass energy of ⊡s = 91.2 GeV. Neutral pions are reconstructed using photons measured in the electromagnetic calorimeter and photons from conversion pairs. The inclusive π0 momentum spectrum is measured in the range 0.025 x p = p/p beam 0 per hadronic Z is found to be 4.80 ± 0.07(stat) ± 0.31(sys). The differential inclusive π0 cross section is …
The Effect Of Data Model, System And Task Characteristics On User Query Performance – An Empirical Study, Hock Chan, Keng Siau, Kwok-Kee Wei
The Effect Of Data Model, System And Task Characteristics On User Query Performance – An Empirical Study, Hock Chan, Keng Siau, Kwok-Kee Wei
Research Collection School Of Computing and Information Systems
With the proliferation of end-user computing and empowerment of end users in the organizations, the user-database interface is increasingly being recognized as an important research area. A user-database interface consists of two key components: the data model and the query language. Database management system designers can manipulate these two components to produce an effective database interface to maximize user task performance. However, in order to do this, the designers first need to know the effect of the two components on end users and the interaction effect of the two components. Despite the acknowledgment of user-database interface as a cornerstone in …