A Taxonomy of Workflow Management Systems for Grid Computing

With the advent of Grid and application technologies, scientists and engineers are building more and more complex applications to manage and process large data sets, and execute scientific experiments on distributed resources. Such application scenarios require means for composing and executing complex workflows. Therefore, many efforts have been made towards the development of workflow management systems for Grid computing. In this paper, we propose a taxonomy that characterizes and classifies various approaches for building and executing workflows on Grids. We also survey several representative Grid workflow systems developed by various projects world-wide to demonstrate the comprehensiveness of the taxonomy. The taxonomy not only highlights the design and engineering similarities and differences of state-of-the-art in Grid workflow systems, but also identifies the areas that need further research.Comment: 29 pages, 15 figure

Moving into Adulthood: Implementation Findings from the Youth Villages Transitional Living Evaluation

The Youth Villages Transitional Living program is intended to help youth who were formerly in foster care or juvenile justice custody, or who are otherwise unprepared for adult life, to make the transition to independent living. Youth Villages, which serves emotionally and behaviorally troubled young people, operates a number of programs in addition to Transitional Living.All of its programs are based on a set of core principles that emphasize treatment planning, systematic assessment of participating youth, and delivery of only evidence-informed practices within a highly structured supervisory system. Transitional Living clients receive intensive, individualized, and clinically focused and communnity-based case management, support, and counseling from staff who carry caseloads of about eight clients each. Youth eligibility is determined through an extensive recruitment and assessment process. Once youth are enrolled, Transitional Living staff continue to assess them to identify needs and work with them to develop goals, which become the basis of required weekly meetings. Over nine months, on average, program participants get support for education, housing, mental or physical health, employment, and life skills. This support is provided in a variety of forms, including action-oriented activities that involve completing a specific task during a weekly session or through more traditional counseling techniques.The Transitional Living Evaluation is focused exclusively on the program in Tennessee, although Youth Villages also has Transitional Living programs in six other states

Work Organisation and Innovation - Case Study: LHT, Germany

[Excerpt] Lufthansa Technik AG (LHT) provides aircraft-related technical services to a worldwide customer base comprising airlines, aircraft leasing companies, maintenance organisations, and operators of business and VIP aircrafts. Besides the maintenance, repair, and overhaul (MRO) services that form the organisation’s core business, activities also include development and production activities, as well as logistics

IAC level "O" program development

The current status of the IAC development activity is summarized. The listed prototype software and documentation was delivered, and details were planned for development of the level 1 operational system. The planned end product IAC is required to support LSST design analysis and performance evaluation, with emphasis on the coupling of required technical disciplines. The long term IAC effectively provides two distinct features: a specific set of analysis modules (thermal, structural, controls, antenna radiation performance and instrument optical performance) that will function together with the IAC supporting software in an integrated and user friendly manner; and a general framework whereby new analysis modules can readily be incorporated into IAC or be allowed to communicate with it

Automatic portal generation based on XML workflow description

This dissertation investigates the automatic generation of computing portals based on XML workflow descriptions. To this end, a software system is designed, implemented and evaluated that allows end-users to build their own customized portal for managing and executing distributed scientific and engineering computations in a service-oriented environment. The whole process of the computation is represented as a data-driven workflow. The portal technique provides a user-friendly problem-solving environment that addresses job assignment, job submission and job feedback. An advantage of this approach is that the complexity of the workflow execution in the distributed environment is hidden from the user. However, the manual development and configuration of the application portal requires considerable expertise in web portal techniques, which most scientific end-users do not have. This dissertation address this problem by describing a tool chain consisting of three tools to achieve automatic portal generation and configuration. In addition, this dissertation presents a mapping of each element of WSDL to the UDDI data model, the conversion from the data-flow workflow to control-flow workflow by using XSLT, an implementation of a drag-and-drop visual programming environment for the generation of a workflow skeleton, and a methodology for the automatic layout of portlets in a portal framework.EThOS - Electronic Theses Online ServiceGBUnited Kingdo

Two ways to Grid: the contribution of Open Grid Services Architecture (OGSA) mechanisms to service-centric and resource-centric lifecycles

Service Oriented Architectures (SOAs) support service lifecycle tasks, including Development, Deployment, Discovery and Use. We observe that there are two disparate ways to use Grid SOAs such as the Open Grid Services Architecture (OGSA) as exemplified in the Globus Toolkit (GT3/4). One is a traditional enterprise SOA use where end-user services are developed, deployed and resourced behind firewalls, for use by external consumers: a service-centric (or ‘first-order’) approach. The other supports end-user development, deployment, and resourcing of applications across organizations via the use of execution and resource management services: A Resource-centric (or ‘second-order’) approach. We analyze and compare the two approaches using a combination of empirical experiments and an architectural evaluation methodology (scenario, mechanism, and quality attributes) to reveal common and distinct strengths and weaknesses. The impact of potential improvements (which are likely to be manifested by GT4) is estimated, and opportunities for alternative architectures and technologies explored. We conclude by investigating if the two approaches can be converged or combined, and if they are compatible on shared resources

HR Contribution to IT Innovation Implementation: Results of Three Case Studies

The theoretical and empirical investigation of information technologies (IT) innovation implementations reveals that they lack conceptual and practical support from HRM professionals. The HRM practices undertaken by HR professionals are not even discussed. We argue that HR departments should contribute to IT innovation projects by being responsible for explicitly defining job tasks that have to be automated, establishing a rewards system for those who have to learn and use a new technology and analysing the training needs of the users and providing them with adequate training. HRM should more actively intervene in IT innovation projects. Such intervention would, we believe, foster compatibility between the prior intentions of information technology, the strategies and practices, the individual users’ needs in it and the adoption of IT by the users

Study on Employee Motivation in Indonesia: Does culture really matter?

The objective of the study is to investigate and analyze the influence of culture on motivation. The research is expected to answer the importance question: Are motivations influenced by national culture? It is generally accepted that motivation is considered to be universal until Hofstede (1980:42) published the seminal work: Culture’s Consequences: International Differences in Work Related Value in 1980. Hofstede’s work is the most popular in cross culture management studies so that his framework in national culture will be used in this research. The study is completed by using survey method. The respondents are 108 managers of HRM from the listed companies of Indonesia Stock Exchange (IDX) 2008/2009. Modified Value Survey Module (VSM) 1994 developed by Hofstede is used to analyze the new scores of culture’ dimension comparing the scores done by Hofstede almost 30 years ago. The results indicate that the national culture dimensions tend higher for masculinity (74), lower for power distance (66), lower for collectivism (27) and low on uncertainty avoidance. When the results are compared to Hofstede’s findings in 1983, they indicate those two dimensions i.e. collectivism and power distance is relatively unchanged (stable). However, masculinity-feminity and uncertainty avoidance dimension tend to change toward higher score. By using the new scores of dimension of national culture, some proposition on motivation is developed