21,891 research outputs found
Simple temperature sensor with direct readout
Sensor is easy to construct, requires only one operational amplifier, and has very fast response. It provides direct readout of temperature on digital voltmeter
Factors influencing students' acceptance of m-learning: An investigation in higher education
M-learning will play an increasingly significant role in the development of teaching and learning methods for higher education. However, the successful implementation of m-learning in higher education will be based on users' acceptance of this technology. Thus, the purpose of this paper is to study the factors that affect university students' intentions to accept m-learning. Based on the unified theory of acceptance and use of technology (UTAUT) (Venkatesh et al., 2003), this study proposes a model to identify the factors that influence the acceptance of m-learning in higher education and to investigate if prior experience of mobile devices affects the acceptance of m-learning. A structural equation model was used to analyse the data collected from 174 participants. The results indicate that performance expectancy, effort expectancy, influence of lecturers, quality of service, and personal innovativeness were all significant factors that affect behavioural intention to use m-learning. Prior experience of mobile devices was also found to moderate the effect of these constructs on behavioural intention. The results of this research extend the UTAUT in the context of m-learning acceptance by adding quality of service and personal innovativeness to the structure of UTAUT and provide practitioners and educators with useful guidelines for designing a successful m-learning system
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Transforming failure into success through organisational learning: An analysis of a manufacturing information system
This paper describes the idiosyncracies of a case study company, through highlighting issues and problems
experienced during their attempts to evaluate, implement and realise the holistic implications of a manufacturing
information system. Although the Information System (IS) was operational for a period of time, it
was eventually deemed a failure. The reason for this was that a range of human and organisational factors
prevented the organisation from embracing the full impact of the system. The eventual success of their
information system was realised through a bespoke implementation, based upon a traditional systems development
lifecycle that indirectly addressed learning issues following the earlier failed deployment. The
paper highlights key issues relating to business success and failure, and then contrasts them alongside the
presented case study. In doing so, the authors conclude by proposing methods through which manufacturing
information systems can be transformed for business success. This is described achievable through both a
realisation in the positioning of the organisation relative to technology management, and the related mapping
of human and technological constructs that support information systems related succes
Pension Freezes and Household Saving Over the Life Cycle
Defined benefit (DB) pension freezes in large healthy firms such as Verizon and IBM, as well as terminations of plans in the struggling steel and airline industries, highlight the fact that these traditional pensions cannot be viewed as risk-free promises from the employeeÂ’s perspective. Indeed, the current turmoil in financial markets and difficult economic outlook for many firms suggest that many more pension plans could be frozen soon. In this preliminary paper we develop an empirical dynamic programming framework to investigate household saving decisions in a model economy with freezeprone DB pensions. The model incorporates important sources of uncertainty facing households, including asset returns, employment, income, and mortality, as well as pension freezes. Applying a compensating variation measure of welfare, we find that pension freezes reduce welfare by a maximum of about 2,000 for individuals with a college degree. We close by highlighting a few important issues that are missing from our preliminary analysis, including a labor supply decision and the effects of market-clearing conditions in the labor market. We hope to address these issues in future work.
Dark Matter Constraints in Heterotic M-Theory with Five-Brane Dominance
The phenomenological implications of the M-theory limit in which
supersymmetry is broken by the auxiliary fields of five-brane moduli is
investigated.
Assuming that the lightest neutralino provides the dark matter in the
universe, constraints on the sparticle spectrum are obtained. Direct detection
rates for dark matter are estimated.Comment: 10 pages, LaTeX file plus 8 EPS figure
Modular Symmetries, Threshold Corrections And Moduli For Orbifolds
Coxeter orbifolds are constructed with the
property that some twisted sectors have fixed planes for which the six-torus
can not be decomposed into a direct sum with the
fixed plane lying in . The string loop threshold corrections to the
gauge coupling constants are derived, and display symmetry groups for the
and moduli that are subgroups of the full modular group . The
effective potential for duality invariant gaugino condensate in the presence of
hidden sector matter is constructed and minimized for the values of the moduli.
The effect of Wilson lines on the modular symmetries is also studied.Comment: QMW--TH--94/18, 12 page
Duality Symmetries in Orbifold Models
We derive the duality symmetries relevant to moduli dependent gauge coupling
constant threshold corrections, in Coxeter orbifolds. We consider
those orbifolds for which the point group leaves fixed a 2-dimensional
sublattice , of the six dimensional torus lattice , where
cannot be decomposed as Comment: 13 pages, QMW--TH--93/21, SUSX--TH--93/1
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