8,465 research outputs found

    Making sense of project value from a value-co-creation perspective: an exploratory conceptual framework

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    This paper proposes a conceptual framework to make sense of how project value is created in projects. We study the extant project management value creation literature using a value co-creation lens based on service-dominant (S-D) logic. We explore how project value is proposed, exchanged and then realized following a project life-cycle. This leads to the identification of an exploratory “value co-creation life-cycle” framework. This framework shows value as a whole transcends the limitation of measurable products value normally used to define the project value. In particular, it shows how operant resources (or actors) - typically referred to as stakeholders - within the project management system exchange services and integrate resources in order to co-create value. The exploratory framework, in turn, would enable future investigation of real projects with the view to unpacking the complex dynamic behavior of project value creation

    Designing a personal information transaction object

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    © 2016 IEEE. As mobile and wearable technologies grow in popularity, ever-increasing volumes of valuable, fine-grained personal information are generated as people go about their daily lives. This information may be exchanged by individuals for "free" services, but there is currently no widely adopted means by which individuals can benefit financially from their personal information. To address this problem we consider a Primary Personal Information Market (PPIM) - a market on which individuals can be financially compensated in exchange for access to their personal information. We draw on Design Science and Market Engineering to justify design choices for a permissions-based Personal Information Transaction Object (PITO), a commodity which could be successfully traded on a Primary Personal Information Market

    Casimir Force for Arbitrary Objects Using the Argument Principle and Boundary Element Methods

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    Recent progress in the simulation of Casimir forces between various objects has allowed traditional computational electromagnetic solvers to be used to find Casimir forces in arbitrary three-dimensional objects. The underlying theory to these approaches requires knowledge and manipulation of quantum field theory and statistical physics. We present a calculation of the Casimir force using the method of moments via the argument principle. This simplified derivation allows greater freedom in the moment matrix where the argument principle can be used to calculate Casimir forces for arbitrary geometries and materials with the use of various computational electromagnetic techniques.Comment: 6 pages, 2 figure

    Isotropic-medium three-dimensional cloaks for acoustic and electromagnetic waves

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    We propose a generalization of the two-dimensional eikonal-limit cloak derived from a conformal transformation to three dimensions. The proposed cloak is a spherical shell composed of only isotropic media; it operates in the transmission mode and requires no mirror or ground plane. Unlike the well-known omnidirectional spherical cloaks, it may reduce visibility of an arbitrary object only for a very limited range of observation angles. In the short-wavelength limit, this cloaking structure restores not only the trajectories of incident rays, but also their phase, which is a necessary ingredient to complete invisibility. Both scalar-wave (acoustic) and transverse vector-wave (electromagnetic) versions are presented.Comment: 17 pages, 12 figure

    Exploring the Role of Enterprise Architecture in IS-enabled Ot: An EA Principles Perspective

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    © 2016 IEEE. Although EA principles have received considerable attention in recent years, there is still little known about how EA principles can be used to govern the transformation of the Information Systems enabled organization. In this research-in-progress paper, we communicate our initial step towards answering the sub-question: how do enforcing EA principles contribute to IS-enabled OT? Based on a comprehensive literature review, we initially propose five testable hypotheses and a research model, which is a pre-requisite to developing a data-driven theory for this important area of research. It is anticipated that the ensuing theory will provide a basis for further research studying the impact of EA on IS-enabled OT. The tested research model will also provide guidance to practitioners on how to effectively design and use EA principles in managing transformative changes caused by IS within their organizations and overall industry sectors

    Physical activity education in the undergraduate curricula of all UK medical schools: are tomorrow's doctors equipped to follow clinical guidelines?

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    Physical activity (PA) is a cornerstone of disease prevention and treatment. There is, however, a considerable disparity between public health policy, clinical guidelines and the delivery of physical activity promotion within the National Health Service in the UK. If this is to be addressed in the battle against non-communicable diseases, it is vital that tomorrow's doctors understand the basic science and health benefits of physical activity. The aim of this study was to assess the provision of physical activity teaching content in the curricula of all medical schools in the UK. Our results, with responses from all UK medical schools, uncovered some alarming findings, showing that there is widespread omission of basic teaching elements, such as the Chief Medical Officer recommendations and guidance on physical activity. There is an urgent need for physical activity teaching to have dedicated time at medical schools, to equip tomorrow's doctors with the basic knowledge, confidence and skills to promote physical activity and follow numerous clinical guidelines that support physical activity promotion

    A Strict Test of Stellar Evolution Models: The Absolute Dimensions of Massive Benchmark Eclipsing Binary V578 Mon

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    We determine the absolute dimensions of the eclipsing binary V578 Mon, a detached system of two early B-type stars (B0V + B1V, P==2.40848 d) in the star-forming region NGC 2244 of the Rosette Nebula. From the light curve analysis of 40 yr of photometry and the analysis of HERMES spectra, we find radii of 5.41±0.045.41\pm0.04 Rsun and 4.29±0.054.29\pm 0.05 Rsun, and temperatures of 30000±500 30000\pm 500~K and 25750±435 25750\pm 435 K respectively. We find that our disentangled component spectra for V578 Mon agree well previous spectral disentangling from the literature. We also reconfirm the previous spectroscopic orbit of V578 Mon finding that masses of 14.54±0.08 14.54\pm 0.08 Msun and 10.29±0.06 10.29\pm 0.06 Msun are fully compatible with the new analysis. We compare the absolute dimensions to the rotating models of the Geneva and Utrecht groups and the models of Granada group. We find all three sets of models marginally reproduce the absolute dimensions of both stars with a common age within uncertainty for gravity-effective temperature isochrones. However - there are some apparent age discrepancies for the corresponding mass-radius isochrones. Models with larger convective overshoot >0.35>0.35 worked best. Combined with our previously determined apsidal motion of 0.070890.00013+0.000210.07089^{+0.00021}_{-0.00013} deg cycle1^{-1}, we compute the internal structure constants (tidal Love number) for the newtonian and general relativistic contribution to the apsidal motion, logk2=1.975±0.017\log{k_2}=-1.975\pm0.017 and logk2=3.412±0.018\log{k_2}=-3.412\pm0.018 respectively. We find the relativistic contribution to the apsidal motion of be small <4%<4\%. We find that the prediction of logk2,theo=2.005±0.025\log{k_{\rm 2,theo}}=-2.005\pm0.025 of the Granada models fully agrees with our observed logk2\log{k_2}.Comment: accepted for publication in AJ 05/02/201

    UNWRAPPING RACIAL HARASSMENT LAW

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    This article is based on a pioneering empirical study of racial harassment in the workplace in which we statistically analyze federal court opinions from 1976 to 2002. Part I offers an overview of racial harassment law and research, noting its common origin with and its close dependence upon sexual harassment legal jurisprudence. In order to put the study’s analysis in context, Part I describes the dispute resolution process from which racial harassment cases arise. Parts II and III present a clear picture of how racial harassment law has played out in the courts—who are the plaintiffs and defendants, the nature of the claims, who wins and loses, and what factors affect those outcomes. We consider dozens of characteristics of the parties, the nature of the harassment, and litigation characteristics (such as the forum, type of proceedings, and legal issues). While it reveals that individuals in all kinds of occupations, in all parts of the country, of all races, and of both genders complain about racial harassment—it also shows that African Americans are disproportionately likely to be plaintiffs. While Whites are the most likely harassers, minority individuals also are defendants. The data also discloses that the most typical legal proceeding is the court’s consideration of the defendants’ motion for summary judgment where the judges end up terminating most plaintiffs’ cases. In fact, the judicial opinions in this study find in the plaintiffs’ favor only 21.5% of the time. (In contrast, an earlier study revealed that judges in sexual harassment cases find in the plaintiffs’ favor 48% of the time – more than twice as often as in racial harassment cases.) As it turns out in racial harassment cases, the race of the plaintiff and of the alleged harasser makes a difference in the parties’ success rates, but the gender of the plaintiff does not. Judges are a bit more likely to find racial harassment when plaintiffs allege blatant racist behavior rather than more subtle and contextual racism. Results vary depending on the location of the case. Part IV provides an integrated analysis of the data, including a look at how racial harassment litigation has evolved over time. It also offers explanations and implications of the study’s results. This article contributes detailed baseline data for litigants, judges, and legislators. Each group can draw upon the totality of racial harassment cases to guide their decisionmaking. The article also offers a sound basis for creating a new racial harassment jurisprudence that should be distinct from both sexual harassment and racial discrimination jurisprudence
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