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Displaying Results 126 - 150 of 9174 on page 6 of 367
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International systems and software engineering standards for very small entities
(2013)
Laporte, Claude; O'Connor, Rory; Fanmuy, Gauthier
International systems and software engineering standards for very small entities
(2013)
Laporte, Claude; O'Connor, Rory; Fanmuy, Gauthier
Abstract:
Very Small Entities (VSEs) developing systems or software are very important to the military since the components they develop are often integrated into products made by larger organizations. Failure to deliver a quality product on time and within budget may threaten both customers and suppliers. One way to mitigate these risks is to put in place proven engineering practices. ISO has ap- proved recently the publication of standards and technical reports, known as ISO/ IEC 29110, to address the needs of VSEs.
http://doras.dcu.ie/18178/
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Uncovering theories in software engineering
(2013)
Stol, Klaas-Jan; Fitzgerald, Brian
Uncovering theories in software engineering
(2013)
Stol, Klaas-Jan; Fitzgerald, Brian
Abstract:
There has been a growing interest in the role of theory within Software Engineering (SE) research. For several decades, researchers within the SE research community have argued that, to become a real engineering science, SE needs to develop stronger theoretical foundations. A few authors have proposed guidelines for constructing theories, building on insights from other disciplines. However, so far, much SE research is not guided by explicit theory, nor does it produce explicit theory. In this paper we argue that SE research does, in fact, show traces of theory, which we call theory fragments. We have adapted an analytical framework from the social sciences, named the Validity Network Schema (VNS), that we use to illustrate the role of theorizing in SE research. We illustrate the use of this framework by dissecting three well known research papers, each of which has had significant impact on their respective subdisciplines. We conclude this paper by outlining a number of implication...
http://hdl.handle.net/10344/3121
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Surface engineering through low temperature deposition of wear resistant layers by reactive magnetron sputter ion plating
(1991)
Ahern, Michael John
Surface engineering through low temperature deposition of wear resistant layers by reactive magnetron sputter ion plating
(1991)
Ahern, Michael John
Abstract:
The aim of this investigation was the deposition of hard» wear resistant titanium nitride (TiN) thin films, produced from a reactive magnetron sputter ion plating device, at high deposition rates and low substrate temperatures. An allied objective vas the understanding and development of experimental methods which would permit the deposition of titanium nitride-type layers on plastic. The early part of the work deals with the formation of TiN layers on high speed steel, at 500°C deposition temperature Modifications in equipment design and deposition procedures aided the formation of adherent TiN layers. The routine deposition of stoichiometric titanium nitride vas facilitated by a control feedback network The use of graded interfaces between the film and the substrate improved adhesion. Total gas pressure and the level of substrate bias affect film hardness and wear resistance. The next stage of the development process vas the deposition of TiN at approximately 250°C substrate temp...
http://doras.dcu.ie/18294/
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Internet-based computer-aided learning for artificial neural networks
(1998)
Keeling, Paul J
Internet-based computer-aided learning for artificial neural networks
(1998)
Keeling, Paul J
Abstract:
This thesis presents research performed to mvestigate the potential offered by the Internet for the implementation of an Engineering Computer-Aided Learning (CAL) environment. The research comprises two categories, a detailed literature survey of CAL and its application through the medium of the Internet environment. As a direct result of the literature survey, the scope of CAL can be considered to comprise the use of text, graphics, animations and sound. It is through the use of the CAL media that the true power of computer-aided education can be realized. The research performed focuses on student motivation, with emphasis placed on the educational environment. The Internet as a CAL environment was chosen for evaluation in this thesis due to its ability to convey information in a variety of contexts to any student with Internet access Courseware was developed for the M Eng (Masters in Engineering) program, specifically in the field of Artificial Neural Networks (ANNs) ANNs lend t...
http://doras.dcu.ie/18911/
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Computer aided engineering for injection mould cooling system design
(1998)
Moran, Niall
Computer aided engineering for injection mould cooling system design
(1998)
Moran, Niall
Abstract:
The time taken in the cooling stage, of a typical injection moulding cycle, is a large factor in the productivity and efficiency of a plastic manufacturing process, and for this reason, must be minimised. In order to do this a cooling system is employed throughout the mould core. This thesis describes the development and implementation of a PC based analysis system that can be used to optimise the size and position of injection mould cooling systems. The software is fully ‘32-Bit’, operating on ‘Windows’ platforms, and uses graphical methods for input and output operations. The two-dimensional geometry of the mould is supplied using AutoCAD 14 and ‘Active-X Automation’. The analysis programs were written using ‘Fortran PowerStation’ and the user interface using ‘Visual Basic’. To employ the optimisation process the ‘Boundary Element Method’ was used to predict the temperature profile throughout the mould. This method is compared to an analytical procedure and the “Finite Element M...
http://doras.dcu.ie/19093/
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Investigation of the wear and failure modes of surface engineered multipoint cutting tools
(1992)
Fleming, Martin G
Investigation of the wear and failure modes of surface engineered multipoint cutting tools
(1992)
Fleming, Martin G
Abstract:
Most of the studies todate into the wear mechanisms associated with cutting tools have been undertaken on single point tools which invariably operate under conditions of high speed and stress. The application of PVD coatings has been claimed to confer great benefits in terms of tool life by reducing friction on the rake face and slowing down diffusion wear. Multipoint cutting tools, notably handsaws and circular saws, have been mostly neglected in these studies despite the fact that these are the basic tools used throughout many industrial environments. Wear is recognised as a serious problem in metal cutting operations and surface engineering via the application of plasma vapour (PVD) film is an established technology. It finds current applications deposited on many areas of industry, including high speed steel drilling, gear cutting and mulling. The current work is a study of the wear and failure modes of both standard and simulated wear tested bandsaw and circular saw blades. A...
http://doras.dcu.ie/18731/
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Particle encapsulation
(2000)
Sun, Xiaobin
Particle encapsulation
(2000)
Sun, Xiaobin
Abstract:
Several engineering processes are powder based, ranging from food processing to engineering ceramic and composite production. In most of these processes, powders of different composition are mixed together in order to produce the final product, and this combining of powders of different density, shape, and surface properties is often very difficult. Mixtures may be quite inhomogeneous. This research focuses on a method of avoiding such problems, by coating individual particles of one material, with a relatively very thick layer of another powder material. The study is limited to undertaking as a first step, the coating of large, nominally spherical particles with a more fine powder, and consists o f two aspects. Experimental work investigates the principle of coating such particles using a ‘snowball’ process, and presents supporting mathematical models to describe the process. The experimental study has identified particular media (particles, binders and powder), and processing co...
http://doras.dcu.ie/19431/
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Global requirements engineering on the cloud: PhD research proposal
(2013)
Hashmi, Sajid Ibrahim
Global requirements engineering on the cloud: PhD research proposal
(2013)
Hashmi, Sajid Ibrahim
Abstract:
Global software development is a business model that involves software development distributed beyond national boundaries. However, distributed nature of the processes makes it very challenging to communicate and collaborate. Requirements engineering is an intensive software development life cycle activity and involves frequent communication among the stakeholders. In global software development, tight project schedules and global distance give rise to incomplete requirements handovers from one site to another. Therefore, the need for an efficient mechanism becomes inevitable as information available to one project team can often contradict what is available to the other. On the other hand, Software as a Service (SaaS) is one of the deployment models of the cloud that can provide multiple users with a web space to collaborate on things of mutual interest. In this research, we propose a SaaS based mechanism to facilitate globally distributed software development teams working on the ...
http://hdl.handle.net/10344/3482
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Information systems, software engineering, and systems thinking: challenges and opportunities
(2008)
Petkov, Doncho; Edgar-Nevill, Denis; Madachy, Raymond; O'Connor, Rory
Information systems, software engineering, and systems thinking: challenges and opportunities
(2008)
Petkov, Doncho; Edgar-Nevill, Denis; Madachy, Raymond; O'Connor, Rory
Abstract:
This article traces past research on the application of the systems approach to information systems development within the disciplines of information systems and software engineering. Their origins historically are related to a number of areas, including general systems theory. While potential improvement of software development practices is linked by some leading experts to the application of more systemic methods, the current state of the practice in software engineering and information systems development shows this is some way from being achieved. The authors propose possible directions for future research and practical work on bringing together both fields with systems thinking.
http://doras.dcu.ie/19770/
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Model-driven engineering of planning and optimisation algorithms for pervasive computing environments
(2011)
CAHILL, VINNY
Model-driven engineering of planning and optimisation algorithms for pervasive computing environments
(2011)
CAHILL, VINNY
Abstract:
This paper presents a model-driven approach to developing pervasive computing applications that exploits design-time information to support the engineering of planning and optimisation algorithms that reflect the presence of uncertainty, dynamism and complexity in the application domain. In particular the task of generating code to implement planning and optimisation algorithms in pervasive computing domains is addressed. We present a layered domain model that provides a set of object-oriented specifications for modelling physical and sensor/actuator infrastructure and state-space information. Our model-driven engineering approach is implemented in two transformation algorithms. The initial transformation parses the domain model and generates a planning model for the application being developed that encodes an application?s states, actions and rewards. The second transformation parses the planning model and selects and seeds a planning or optimisation algorithm for use in the appli...
http://hdl.handle.net/2262/64052
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Biomaterials and scaffolds for tissue engineering
(2011)
O'BRIEN, FERGAL
Biomaterials and scaffolds for tissue engineering
(2011)
O'BRIEN, FERGAL
Abstract:
Every day thousands of surgical procedures are performed to replace or repair tissue that has been damaged through disease or trauma. The developing field of tissue engineering (TE) aims to regenerate damaged tissues by combining cells from the body with highly porous scaffold biomaterials, which act as templates for tissue regeneration, to guide the growth of new tissue. This article describes the functional requirements, and types, of materials used in developing state of the art of scaffolds for tissue engineering applications. Furthermore, it describes the challenges and where future research and direction is required in this rapidly advancing field.
http://hdl.handle.net/2262/54960
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Dynamic adaptive search based software engineering needs fast approximate metrics (Keynote)
(2013)
Harman, Mark; Clark, John; Ó Cinnéide, Mel
Dynamic adaptive search based software engineering needs fast approximate metrics (Keynote)
(2013)
Harman, Mark; Clark, John; Ó Cinnéide, Mel
Abstract:
Search Based Software Engineering (SBSE) uses fitness functions to guide an automated search for solutions to challenging software engineering problems. The fitness function is a form of software metric, so there is a natural and close interrelationship between software metics and SBSE. SBSE can be used as a way to experimentally validate metrics, revealing startling conflicts between metrics that purport to measure the same software attributes. SBSE also requires new forms of surrogate metrics. This topic is less well studied and, therefore, remains an interesting open problem for future work. This paper1 overviews recent results on SBSE for experimental metric validation and discusses the open problem of fast approximate surrogate metrics for dynamic adaptive SBSE.
http://hdl.handle.net/10344/3147
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Incorporating a self-directed learning pedagogy in the computing classroom: problem-based learning as a means to improving software engineering learning outcomes
(2014)
Cawley, Oisín; Weibelzahl, Stephan; Richardson, Ita; Delaney, Yvonne
Incorporating a self-directed learning pedagogy in the computing classroom: problem-based learning as a means to improving software engineering learning outcomes
(2014)
Cawley, Oisín; Weibelzahl, Stephan; Richardson, Ita; Delaney, Yvonne
Abstract:
With a focus on addressing the perceived skills gap in Software Engineering (SE) graduates, some educators have looked to employing alternative teaching and learning strategies in the classroom. One such pedagogy is Problem-Based Learning (PBL), an approach the authors have incorporated into the SE curriculum in two separate third-level institutions in Ireland, namely the University of Limerick (UL) and the National College of Ireland (NCI). PBL is an approach to teaching and learning which is quite different to the more typical “lecture” style found in most 3rd level institutions. PBL allows lecturers to meet educational and industry-specific objectives; however, while it has been used widely in Medical and Business schools, its use has not been so widespread with computing educators. PBL is not without its difficulties given that it requires significant changes in the role of the lecturer and the active participation of the students. Here, the authors present the approach taken to...
http://hdl.handle.net/10344/4387
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Visualising feasible operating ranges within tissue engineering systems using a "windows of operation" approach: A perfusion-scaffold bioreactor case study.
(2012)
McCoy, Ryan J; O'Brien, Fergal J
Visualising feasible operating ranges within tissue engineering systems using a "windows of operation" approach: A perfusion-scaffold bioreactor case study.
(2012)
McCoy, Ryan J; O'Brien, Fergal J
Abstract:
<p>This article is also available from <a href="http://onlinelibrary.wiley.com/">http://onlinelibrary.wiley.com</a></p>
<p>Tissue engineering approaches to developing functional substitutes are often highly complex, multivariate systems where many aspects of the biomaterials, bio-regulatory factors or cell sources may be controlled in an effort to enhance tissue formation. Furthermore, success is based on multiple performance criteria reflecting both the quantity and quality of the tissue produced. Managing the trade-offs between different performance criteria is a challenge. A "windows of operation" tool that graphically represents feasible operating spaces to achieve user-defined levels of performance has previously been described by researchers in the bio-processing industry. This paper demonstrates the value of "windows of operation" to the tissue engineering field using a perfusion-scaffold bioreactor system as a c...
https://epubs.rcsi.ie/anatart/52
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Biomaterials and scaffolds for tissue engineering
(2011)
O'Brien, Fergal J
Biomaterials and scaffolds for tissue engineering
(2011)
O'Brien, Fergal J
Abstract:
<p>NOTICE: this is the author’s version of a work that was accepted for publication in Materials Today. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Materials Today, 14, 3, (March 2011). http://www.materialstoday.com/</p>
<p>Every day thousands of surgical procedures are performed to replace or repair tissue that has been damaged through disease or trauma. The developing field of tissue engineering (TE) aims to regenerate damaged tissues by combining cells from the body with highly porous scaffold biomaterials, which act as templates for tissue regeneration, to guide the growth of new tissue. This article describes the functional requirements, and types, of materials used in developing state...
https://epubs.rcsi.ie/anatart/38
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Analysis of osteogenesis on a novel collagen glycosaminoglycan scaffold- in vitro application for bone tissue engineering
(2010)
Keogh, Michael
Analysis of osteogenesis on a novel collagen glycosaminoglycan scaffold- in vitro application for bone tissue engineering
(2010)
Keogh, Michael
Abstract:
<p>Currently, there exists a need to develop new bone graft substitutes as an alternative to conventional autografting and allografting treatments due to disadvantages such as cost, scarcity of tissue, multiple surgical procedures and the risk of infection. Tissue engineering provides an alternative solution and relies extensively on the use of porous scaffolds to provide the appropriate environment for the regeneration of tissues and organs. These scaffolds are typically seeded with cells and occasionally growth factors or subjected to biophysical stimuli in the form of a bioreactor and are either cultured <em>in vitro </em>to synthesise tissues which can then be implanted into an injured site or are implanted directly into the injured site and through the body's own systems, regeneration of tissues or organs is induced <em>in vivo. </em>In our laboratory, we use a type 1 collagen glycosaminoglycan (CG) scaffold for tissue engineering applications...
https://epubs.rcsi.ie/phdtheses/30
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Factors Which Influence The Academic Performance Of Level 7 Engineering Students
(2015)
McCool, Rauri; Kelly, Sinead; Maguire, Moira; Clarke, Dermot; Loughran, Damian
Factors Which Influence The Academic Performance Of Level 7 Engineering Students
(2015)
McCool, Rauri; Kelly, Sinead; Maguire, Moira; Clarke, Dermot; Loughran, Damian
Abstract:
High module failure rates can lead to poor student retention and a need exists for improved understanding of the determinants to academic performance. This research examines the influence of a number of factors on academic performance among Level 7 Engineering students in Dundalk Institute of Technology over a four year period. Using statistical regression techniques age-group, attendance, marks available for continuous assessment, class-size, semester of study and year of study were investigated. Statistical evaluations based on a sample set of 1263 identified that mature students, students with positive levels of attendance and modules with high levels of continuous assessment marks appear to result in better performance. It is envisaged that this work will contribute significant data to the limited knowledge base in this area especially in terms of engineering education. Based on the findings of this study, it is recommended that continuous assessment activities, which take place...
http://eprints.dkit.ie/481/
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Mapping the Global Dimension within teaching and learning
(2014)
Byrne, Edmond P.
Mapping the Global Dimension within teaching and learning
(2014)
Byrne, Edmond P.
Abstract:
This chapter attempts to map the Global Dimension of engineering within the academic setting and hence provide some pointers as to how academics can incorporate Global Dimension perspectives and capacities into engineering programmes. It takes its cue (both in terms of defining the Global Dimension and in framing the problem of Global Dimension incorporation) from the Engineers Against Poverty publication "The Global Engineer: Incorporating global skills within UK higher education of engineers" (Bourne and Neal, 2008), and proceeds to propose some possible interventions. For this reason, this chapter should be read in conjunction with the above mentioned publication, which is available online.
http://hdl.handle.net/10468/2483
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Situating requirements engineering methods within design science research
(2016)
Akhigbe, Okhaide; Lessard, Lysanne
Situating requirements engineering methods within design science research
(2016)
Akhigbe, Okhaide; Lessard, Lysanne
Abstract:
Design Science Research Methodologies (DSRM) are increasingly used to guide research in fields beyond Information Systems, in particular those of Requirements Engineering and Software Engineering (RE/SE). While a number of DSR methodologies have been developed by scholars in the RE/SE fields, there remains a certain level of confusion about the way in which the aim and scope of DSRM and those of methods typically used in RE/SE differ. This issue can be observed in graduate students' work as well as in published literature. In particular, the difference be-tween the research orientation of DSRM and the solution orientation of RE/SE methods can be difficult to navigate. We propose to address this challenge by situating three RE/SE methodologies proposed in published literature within one common DSRM; doing so clarifies the scope of these methodologies and highlights ways in which the knowledge contributions of their results could be further enhanced. This effort is a first step t...
http://hdl.handle.net/10468/2564
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Human Factors Engineering in System Design: A Roadmap for Improvement
(2015)
LEVA, CHIARA
Human Factors Engineering in System Design: A Roadmap for Improvement
(2015)
LEVA, CHIARA
Abstract:
This paper summarises current industrial practices and standards promoting Human Factors Engineering (HFE) at design stage and revise them with an action research approached based on the concrete case studies performed during a European project called TOSCA. The paper highlights how HFE can significantly impact the costs and risk associated with a plant lifecycle and the current gaps and issues encountered. The gaps identified are used to guide industrial practices and standards towards a more valuable inclusion of Human Factors knowledge in structured system design processes to support human performance and reduce the potential for human errors in operations and maintenance.
http://hdl.handle.net/2262/76899
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Tissue engineering whole bones through endochondral ossification: Regenerating the distal phalanx
(2015)
BUCKLEY, CONOR; KELLY, DANIEL
Tissue engineering whole bones through endochondral ossification: Regenerating the distal phalanx
(2015)
BUCKLEY, CONOR; KELLY, DANIEL
Abstract:
Novel strategies are urgently required to facilitate regeneration of entire bones lost due to trauma or disease. In this study, we present a novel framework for the regeneration of whole bones by tissue engineering anatomically shaped hypertrophic cartilaginous grafts in vitro that subsequently drive endochondral bone formation in vivo. To realize this, we first fabricated molds from digitized images to generate mesenchymal stem cell-laden alginate hydrogels in the shape of different bones (the temporomandibular joint [TMJ] condyle and the distal phalanx). These constructs could be stimulated in vitro to generate anatomically shaped hypertrophic cartilaginous tissues that had begun to calcify around their periphery. Constructs were then formed into the shape of the distal phalanx to create the hypertrophic precursor of the osseous component of an engineered long bone. A layer of cartilage engineered through self-assembly of chondrocytes served as the articular surface of these const...
http://hdl.handle.net/2262/77351
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Case study of the Home Energy Saving Scheme : a multidisciplinary approach
(2014)
Byrne, Amiee Jennifer
Case study of the Home Energy Saving Scheme : a multidisciplinary approach
(2014)
Byrne, Amiee Jennifer
Abstract:
THESIS 10709
The EU has set itself the objective of achieving 20% primary energy savings by 2020. Because of the relatively recent move towards sustainability, there is a limited understanding of how effective related policies and actions have been. This in turn stymies the development and impact of such policies. To this end, this thesis examines the case study of the Irish government's national grant scheme to encourage energy efficiency retrofit in private housing. That is the Home Energy Saving (HES) Scheme, later rebranded the Better Energy; Homes (BEH) scheme. The methodology design draws from the disciplines of structural engineering, thermal engineering and human geography.
http://hdl.handle.net/2262/79504
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Software process improvement in industry in a graduate software engineering curriculum
(2016)
Laporte, Claude; O'Connor, Rory
Software process improvement in industry in a graduate software engineering curriculum
(2016)
Laporte, Claude; O'Connor, Rory
Abstract:
Software process improvement (SPI) is considered one of the most important fields in the software engineering discipline. But despite its importance, increasing its coverage in educational settings is still challenging. By influencing the syllabus for university-level graduate and undergraduate courses to include quality and process improvement, the future professionals, on entering the various industries, could act as ambassadors for process improvement. This article deals with one such example at the École de technologie supérieure (ÉTS), where SPI is taught in lecture format and with a 10-week implementation project in organizations by teams of students from the graduate software engineering curriculum. The SPI course is taught using a “problem-goal-solution” approach where students learn that any process improvement initiative must be based on issues preventing an organization from achieving its organizational goals whether the organization is a company or a not-for-profit organ...
http://doras.dcu.ie/21428/
Marked
Mark
Tissue engineering scaled-up anatomically shaped osteochondral constructs for joint resurfacing
(2014)
Mesallati, Tariq
Tissue engineering scaled-up anatomically shaped osteochondral constructs for joint resurfacing
(2014)
Mesallati, Tariq
Abstract:
THESIS 10426
Partial and total joint replacements are the only surgical procedures currently available to treat articular cartilage degeneration associated with degenerative diseases such as osteoarthritis (OA). While these procedures are well established, they are not without limitations and failures are not uncommon. Joint replacement prostheses also have a finite lifespan making them unsuitable for the growing population of younger and more active patients requiring treatment for OA. In recent years there has been increased interest in the use of cell and tissue engineering based therapies for the treatment of focal cartilage defects. These therapies aim to regenerate or replace damaged tissues through a combination of cells, three-dimensional scaffolds and signalling molecules. While significant progress has been made in this field, realizing an efficacious therapeutic option for the treatment of OA remains elusive and is considered to be one of the greatest challenges in th...
http://hdl.handle.net/2262/80349
Marked
Mark
Developments in global software engineering education
(2016)
Clear, Tony; Beecham, Sarah; Barr, John; Daniels, Mats; Oudshoorn, Michael; Noll, John
Developments in global software engineering education
(2016)
Clear, Tony; Beecham, Sarah; Barr, John; Daniels, Mats; Oudshoorn, Michael; Noll, John
Abstract:
An ITiCSE 2015 conference working group report has recently delivered a comprehensive systematic review of the literature addressing the challenges and solutions in teaching global software engineering courses. In this panel session, a group of authors of that report will review the findings, and present their own views on teaching such courses, the pros and cons and their own motivations and experiences, together with strategies that have proven effective. We argue that these courses are critical for preparing students for practice as software engineers in today's global settings, but they are certainly not for the faint-hearted. After the review and presentation of position statements by panelists there will be a question and answer session with the audience and a discussion elaborating on the next frontiers in research and practice for global software engineering education.
ACCEPTED
peer-reviewed
http://hdl.handle.net/10344/6009
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