109 resultados para goal-oriented requirements engineering


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The School of Engineering at Deakin University (SOE-DU) is committed to provide authentic and unique learning experiences to students. Over the last five years, SOE-DU has undertaken a study to develop a unique teaching and learning model. The proposed model was based on the Project- Oriented Design Based Learning (PODBL) philosophy which is unique within Australia and in the world. Fundamentally, the framework balances project-driven pedagogy with a design-focused practice in response to industry needs. This paper focuses on the development of PODBL and articulating how it helps nurture creative and industry-ready professional engineers.

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Service Engineering (SE) and Service Oriented Architecture (SOA) originally reside on different plateaus of discipline. SE is defined as a set of activity introducing a new business service, while SOA is a technical approach to redefine an enterprise business processes as a set of IT enabled services. This paper proposes a SOA embedded SE framework as a comprehensive approach in re-defining business service and its IT implementation. After an introduction, a review of existing SE frameworks and SOA methodologies is presented in the paper. Afterward, a complete SE framework is proposed with several results on early case studies. A survey results are then presented to prove the usability and benefit of the proposed framework. The framework is designed and proposed to help practitioners and researchers to conduct service engineering by employing principles and methodology offered by SOA approach.

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BACKGROUND OR CONTEXT: For over 20 years, Deakin University has delivered an accredited undergraduate engineering course by means of distance education. Prior to 2004, off-campus students were not required to attend classes in person on campus. The course was designed so that the off campus students were able to undertake all study and assessment tasks remotely from the university campus. Offering accredited domestic undergraduate engineering courses via distance education has been seen as an important strategy for helping to provide graduate domestically educated engineers to meet Australia’s current and future needs. From 2000 the Australian accreditation management system for professional engineers, as managed by Engineers Australia, has increased its scrutiny of accredited domestic undergraduate engineering courses that were provided in distance-education mode. This led to a series of policies and recommendations for Australian universities that offer accredited engineering courses in distance-education mode: one of the recommendations was that off campus
enrolled engineering students should periodically attend some campus-based activities throughout the course. During the 2004 accreditation review of engineering courses at Deakin University, the
accreditation panel requested that mandatory campus-based activities be incorporated into the accredited undergraduate engineering course. Specifically the request was that Deakin mandate that all off-campus students enrolled in an accredited undergraduate engineering course provided by university attend in person a residential school at least once during every year of equivalent full-time study load. The accreditation panel suggested a program model for the residential school component of the course as developed by the University of Southern Queensland.
PURPOSE OR GOAL: This paper describes the development of the mandatory residential school component of accredited distance education undergraduate engineering courses at Deakin University with
a particular focus on how the residential school program is implemented at level 1 (first-year full-time equivalent level) of the courses.
APPROACH: To be compliant with accreditation requirements, since 2005 Deakin has conducted residential schools for off-campus students at its Geelong Waurn Ponds Campus. Initially the schools were conducted annually over two-weeks during the first semester, and have transitioned to the current mode where the residential school is conducted as a one week programme in each of the trimesters. During these schools, activities are organised around the respective engineering-course units undertaken by students during the trimester.
DISCUSSION: The minimum requirements for the on-campus components of distance-education-mode accredited engineering courses were developed by Engineers Australia in consultation with members of the Washington Accord (International Education Alliance) and at the time of development, generated considerable debate (Palmer, 2005, 2008). The intended purpose of residential schools was for off-campus enrolled students to have reasonable exposure to a typical “on-the-campus” student experience periodically throughout the course. Elements considered suitable and worthwhile for inclusion in residential school programs included:
• in person engagement with their academic lecturers,
• presentations and interaction with guest speakers from industry,
• industry-based site visits,
• engagement in sole and group-based learning and assessment activities on campus, and
• social interaction with other students.
RECOMMENDATIONS/IMPLICATIONS/CONCLUSION: We have found that advantages to the students who attends a residential school include completing real practical work without the need to assemble their own materials at home, and social engagement with staff and students. Off-campus students leave the residential school with a sense of belonging to a “community”, “one of many doing the same and not the only one”. They have the opportunity to share their often significant professional experience with the generally younger and less experienced on-campus student colleagues. Through this interaction between on-campus and off-campus students, the on-campus students benefit as much as the off-campus students. The disadvantages to the off-campus students is the requirement to travel to Geelong for an extended time, which costs the students both money and time away from work and family. From our experience, we recommend to other institutions starting residential schools of their own that they exploit the mandatory on-campus-presence requirement to enhance learning outcomes, well publicised timetables be available to students before trimester begins (certainly before census date), a standardised academic week during trimester be set for all residential schools, encourage student feedback on the program, and apply a practice of uniformity and consistency in how the programme is managed, especially mandated student attendance. Our residential schools for off-campus-mode students have been running for over 10 years. We have found that the educational and social advantages to the student outweigh the disadvantages.

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With the increasing popularity of utility-oriented computing where the resources are traded as services, efficient management of quality of service (QoS) has become increasingly significant to both service consumers and service providers. In the context of distributed multimedia content adaptation deployment on service-oriented computing, how to ensure the stringent QoS requirements of the content adaptation is a significant and immediate challenge. However, QoS guarantees in the distributed multimedia content adaptation deployment on service-oriented platform context have not been accorded the attention it deserves. In this paper, we address this problem. We formulate the SLA management for distributed multimedia content adaptation deployment on service-oriented computing as an integer programming problem. We propose an SLA management framework that enables the service provider to determine deliverable QoS before settling SLA with potential service consumers to optimize QoS guarantees. We analyzed the performance of the proposed strategy under various conditions in terms of the SLA success rate, rejection rate and impact of the resource data errors on potential violation of the agreed upon SLA. We also compared the proposed SLA management framework with a baseline approach in which the distributed multimedia content adaptation is deployed on a service-oriented platform without SLA consideration. The results of the experiments show that the proposed SLA management framework substantially outperforms the baseline approach confirming that SLA management is a core requirement for the deployment of distributed multimedia content adaptation on service-oriented systems.

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A cloud workflow system is a type of platform service which facilitates the automation of distributed applications based on the novel cloud infrastructure. One of the most important aspects which differentiate a cloud workflow system from its other counterparts is the market-oriented business model. This is a significant innovation which brings many challenges to conventional workflow scheduling strategies. To investigate such an issue, this paper proposes a market-oriented hierarchical scheduling strategy in cloud workflow systems. Specifically, the service-level scheduling deals with the Task-to-Service assignment where tasks of individual workflow instances are mapped to cloud services in the global cloud markets based on their functional and non-functional QoS requirements; the task-level scheduling deals with the optimisation of the Task-to-VM (virtual machine) assignment in local cloud data centres where the overall running cost of cloud workflow systems will be minimised given the satisfaction of QoS constraints for individual tasks. Based on our hierarchical scheduling strategy, a package based random scheduling algorithm is presented as the candidate service-level scheduling algorithm and three representative metaheuristic based scheduling algorithms including genetic algorithm (GA), ant colony optimisation (ACO), and particle swarm optimisation (PSO) are adapted, implemented and analysed as the candidate task-level scheduling algorithms. The hierarchical scheduling strategy is being implemented in our SwinDeW-C cloud workflow system and demonstrating satisfactory performance. Meanwhile, the experimental results show that the overall performance of ACO based scheduling algorithm is better than others on three basic measurements: the optimisation rate on makespan, the optimisation rate on cost and the CPU time.

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In this paper, we propose an architecture of accounting and payment services for service-oriented grid computing systems. The proposed accounting and payment services provide the mechanisms for service providers to be paid for authorized use of their resources. It supports the recording of usage data, secure storage of that data, analysis of that data for purposes of billing and so forth. It allows a variety of payment methods, it is scalable, secure, convenient, and reduce the overall cost of payment processing while taking into account requirements of Grid computing systems.

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In recent years, building demolition has been challenging urban developers due to the increased incidence of demolition projects and the elevation of demolition requirements. The importance of building demolition is also recognised by researchers and, given its environmental impacts, it is anticipated to achieve the same attention as conventional planning, design,
construction and maintenance in the near future. In this article, the authors aim to develop a series of strategies for promoting building demolition practice. Environmentally-friendly demolition procedures are introduced through a waste minimisation decision that makes the approach on alternatives to demolition and an integrated demolition planning and design approach focus on a just-in-time (JIT) philosophy. A conceptual management framework is also presented for the implementation of demolition projects.

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Responses were collected from commencing engineering students and an inventory of reasons stated for electing to study engineering was developed. Commencing engineering students were strongly career oriented; they believed that engineering would be an interesting and rewarding career that would offer enjoyment and career options. No difference was found in the principal reasons stated by respondents based on gender or course of study. On-campus students nominated principally career-related reasons for their choice of study (71 percent). While career-related reasons were still important for off-campus students, the most frequent type of responses were related to career upgrading (43.9 percent).

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Finite Element Method (FEM) is widely used in Science and Engineering since 1960’s. The vast majority of FEM software is procedure-oriented. However, this conventional style of designing FEM software encounters problems in maintenance, reuse, and expansion of the software. Recently the object-oriented finite element method attracts the attention of lots of researchers, and now there is a growing interest in this method. In this paper, the object-oriented finite element (OOFE) is briefly introduced. Then the design and development of an integrated OOFE system is described. A comparison of the integrated OOFE system and a procedure-oriented system shows that our OOFE system has many advantages.

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Responses were collected from commencing engineering students and an inventory of reasons stated for electing to study engineering was developed. Commencing engineering students were strongly career oriented, they believed that engineering would be an interesting and rewarding career that would offer enjoyment and career options. No difference was found in the principal reasons stated by respondents based on gender or course of study. On-campus students nominated principally career-related reasons for their choice of study (71 percent). While career-related reasons were still important for off-campus students, the most frequent type of responses were related to career upgrading (43.9 percent).

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The increasing attribute focus in the formation (engineering education, training, work-based learning and experience) of engineers now being adopted by engineering education accrediting bodies is based on meeting the perceived needs of professional practice. Related to this is an increasing expectation of new graduates being work-ready rather than relying on work-based learning and experience to develop many of the essential professional practice attributes.

The scope of the mechanical engineering profession is broad and practitioners contributing to debate on attribute requirements have their own individual views of the nature of the profession, largely influenced by their own professional formation. As a foundation for detailed study on attribute requirements for effective Australian professional mechanical engineers, in this paper we provide a concise study of the development of the established scope of practice and knowledge base of the profession over the last two centuries. Formation practices in Europe and the United States played significant roles in the 19th century.

We conclude with a discussion on the impact of the considerable changes currently affecting mechanical engineering practice in the UK, US and Australia, including organisational, technical and societal expectations, industry profile, and educational factors.

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Engineers Australia is the Australian professional body that accredits undergraduate engineering programs. It espouses an ‘outcomes-based’ program accreditation philosophy, but imposes mandatory ‘process’ requirements for off-campus programs that are in addition to the requirements for conventional on-campus programs. The focus on off-campus engineering study raises the question: how can learning outcomes, regardless of mode of study, be effectively measured? The current answer appears to be ‘graduate attributes’. The literature reveals a range of sophistication in approach to graduate attributes from identifying desirable graduate attributes, through to evidence-based certification of individual student attainment of graduate attributes. Many engineering accrediting bodies around the world identify student portfolios as a strategy for demonstrating student attainment of graduate attributes. The increasing use of online technology by students and educators alike, including as part of assessment, means that many of the reported applications of student portfolios are online portfolios. The effectiveness of online student portfolios will depend on them being embedded in day-to-day educational practice, rather than being an optional extra given a low priority by busy students. This paper presents a survey of the related literature and briefly outlines a project in progress at Deakin University to trial an online student portfolio.

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Dynamic deployment of Web services is a term used frequently when describing the selection and deployment of a service to a grid host. Although current grid systems (such as Globus) provide dynamic deployment, the requirements of the service being deployed are not considered. Therefore truly dynamic deployment cannot be achieved as the services deployed are restricted to the grid system used. We present a dynamic deployment mechanism as part of self configuration in a service oriented grid environment. The dynamic deployment mechanism takes the requirements of the service into consideration, including parameters such as the operating system required to execute the service, the required software libraries, any additional required software packages, price and Quality of Service (QoS) parameters.