Contribution structures

The invisibility of the individuals and groups that gave rise to requirements artifacts has been identified as a primary reason for the persistence of requirements traceability problems. This paper presents an approach, based on modelling the dynamic contribution structures underlying requirements artifacts, which addresses this issue. We show how these structures can be defined, using information about the agents who have contributed to artifact production, in conjunction with details of the numerous traceability relations that hold within and between artifacts themselves. We describe a scheme, derived from work in sociolinguistics, which can be used to indicate the capacities in which agents contribute. We then show how this information can be used to infer details about the social roles and commitments of agents with respect to their various contributions and to each other. We further propose a categorisation for artifact-based traceability relations and illustrate how they impinge on the identification and definition of these structures. Finally, we outline how this approach can be implemented and supported by tools, explain the means by which requirements change can be accommodated in the corresponding contribution structures, and demonstrate the potential it provides for "personnel-based" requirements traceability

Arc Statistics in Clusters: Galaxy Contribution

The frequency with which background galaxies appear as long arcs as a result of gravitational lensing by foreground clusters of galaxies has recently been found to be a very sensitive probe of cosmological models by Bartelmann et al. (1998). They have found that such arcs would be expected far less frequently than observed (by an order of magnitude) in the currently favored model for the universe, with a large cosmological constant $\Omega_\Lambda \sim 0.7$. Here we analyze whether including the effect of cluster galaxies on the likelihood of clusters to generate long-arc images of background galaxies can change the statistics. Taking into account a variety of constraints on the properties of cluster galaxies, we find that there are not enough sufficiently massive galaxies in a cluster for them to significantly enhance the cross section of clusters to generate long arcs. We find that cluster galaxies typically enhance the cross section by only $\lesssim 15$.Comment: 19 pages, 1 figure, uses aasms4.sty, submitted to Ap

The Contribution of Students Team Achievement Division (Stad) and Motivation Towards Writing Comparison and Contrast Text of the First Semester Management Students at University Muhammadiyah of Metro

The purpose of the present study is to explore the positive effects of Student Teams Achievement Division (STAD) on other important factors such as students\u27 motivation. STAD was used with thirty students and was compared to thirty management students who worked in groups lacking the key components of STAD. Both groups completed pretest and posttest and responded in motivational questionnaire which measured changes in exposure to writing skill in English. The findings showed that (1) there was a significant progress within each group, (2) there was also significant mean difference between the experimental and control group with the contribution of the STAD approach to students\u27 motivation and to writing achievemen

Potential Contribution of Sharia Micro Financing on Poverty Reduction in Slum Communities in Makassar

Poverty is a problem faced by many countries. A country that has a high number of poor people, will always face various cases as a result of poverty, namely low education, high unemployment, health problems, criminal cases and prone to security problems. That is because the poor people not only lack money, but also do not have access to health services, food and education, so they are vulnerable to illness, malnutrition, and unable to get a good education. Considering its impact on people\u27s lives, it is deemed necessary to take actions that can reduce poverty. Governments in many countries and International institutions have also sought to help the poor throughout the world, through microfinance programs. This effort has succeeded in reducing poverty at the global level. On the other hand, poverty is still quite high. The dependence of the poor on poverty alleviation programs from the government often leads to community dependence on the government. They are just waiting for help to stay alive, so they cannot get out of the cycle of poverty. Therefore, in efforts to alleviate poverty, the important thing to do by the government and institutions involved in poverty reduction is to encourage the independence of the poor so that they can get out of the poverty circle by their own efforts. One effort to encourage the independence of the poor is to provide capital so that they can build their own business activities. In some circumstances, microfinance can be a strategy to provide a way out for the poor to escape poverty. This study aims to identify the potential contribution of Islamic microfinance to reduce poverty in slums in Makassar. The method used in this study is qualitative, in which data are collected through in-depth interviews with slum communities who have not been touched by access to financial institutions. Other interviews were conducted with the management of Islamic microfinance institutions. Interviews found that urban communities living in slums wanted to access financial institutions, but did not have the opportunity. While from the LKMS, it was stated that there are many financing programs provided for the poor. This shows that the opportunity to reduce poverty is very good with the large potential contribution of LKMS in encouraging the independence of the poor through business activities

Gravitational contribution to fermion masses

In the context of a nonlinear gauge theory of the Poincar\'e group, we show that covariant derivatives of Dirac fields include a coupling to the translational connections, manifesting itself in the matter action as a universal background mass contribution to fermions.Comment: revtex4, 9 pages, no figures, to be published in Eur.Phys.J.C, 200

Thermal contribution of unstable states

Within the framework of the Lee model, we analyze in detail the difference between the energy derivative of the phase shift and the standard spectral function of the unstable state. The fact that the model is exactly solvable allows us to demonstrate the construction of these observables from various exact Green functions. The connection to a formula due to Krein, Friedal, and Lloyd is also examined. We also directly demonstrate how the derivative of the phase shift correctly identifies the relevant interaction contributions for consistently including an unstable state in describing the thermodynamics.Comment: 11 pages, 2 figures, to be submitted to EPJ

George’s Contribution to Political Economy

[Excerpt] [George’s] views led to the creation of single tax reform movements at the grassroots level in several western states in the United States as well as in Britain, Australia, Canada and continental Europe. Today, several economists and institutes continue to believe in the contemporary relevance of his ideas

INSDOC’S contribution to bibliometrics

Traces the history of bibliometric research, training and activities in INSDOC. Describes briefly the objectives, facilities, services, research activities, and publications of National Centre on Bibliometrics