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Current Search:
'engineering' in all fields;
3231 items found
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Displaying Results 76 - 100 of 3231 on page 4 of 130
Marked
Mark
Production of hard tissue scaffolds using three-dimensional printing method
(2009)
Szűcs, Tamás D.
Production of hard tissue scaffolds using three-dimensional printing method
(2009)
Szűcs, Tamás D.
Abstract:
Synthesised bone replacement scaffolds provide the possibility to individually tailor properties, overcome limited donor availability and improve osteointegration. The aim of bone tissue engineering is to provide solutions to these problems by making available high quality transplants that can be supplied in larger quantities. In these applications both the internal and external geometry of the scaffold are very important since they have significant effect on mechanical properties, permeability and cell proliferation. Rapid Prototyping technologies allow the use of customised materials with predetermined and optimised geometries to be fabricated with good accuracy. This work investigates the ability of the 3D printing technology to manufacture intricate bone scaffold geometries from biocompatible calcium phosphate based materials. Initial investigations with the proprietary materials showed that predicted directional mechanical behaviour can be realised. Practical measurements inves...
http://doras.dcu.ie/2373/
Marked
Mark
Occupational Therapy and Rehabilitation Engineering-a case study
(1999)
Flynn, Susan; Ward, Tomas; Flynn, Gareth
Occupational Therapy and Rehabilitation Engineering-a case study
(1999)
Flynn, Susan; Ward, Tomas; Flynn, Gareth
Abstract:
This is a case study of the occupational therapy rehabilitation process of a teenage girl who presented in 1997 with a rare neurological condition diagnosed as rapid onset Dystonia Parkinsonism. She was helped to obtain some of the occupational performances of her choice by assistive technology devices tailored to her needs by the rehabilitation engineering department, and in this paper we wish to point out how collaboration between our departments can be of benefit to patients, and how essential microelectronic technology is in the occupational therapy environment.
http://eprints.nuim.ie/1365/
Marked
Mark
Network Latency in On-Line Gaming: An Engineering or a Psychological Problem?
(2006)
Linehan, Conor; Roche, Bryan; McLoone, Seamus; Ward, Tomas
Network Latency in On-Line Gaming: An Engineering or a Psychological Problem?
(2006)
Linehan, Conor; Roche, Bryan; McLoone, Seamus; Ward, Tomas
Abstract:
Ongoing research attempts to find engineering-based solutions to the problem of network latency in multiplayer computer games. However, few studies have been conducted to examine the end-users' experience of latency from a psychological perspective. The current study examines the roles of network latency and game complexity on the subjective experience of participants playing a specially designed computer game. Results suggest that participants prefer complex over simple games, regardless of the level of latency experienced. These findings suggest the possibility of a psychological solution to some of the negative effects of network latency. It is suggested that by manipulating Relational Complexity, it may be possible to maintain a satisfactory gaming experience in the presence of latency.
http://eprints.nuim.ie/1284/
Marked
Mark
Software Engineering meets Problem-based Learning
(2003)
Delaney, J. Declan; Mitchell, George; Delaney, Sean
Software Engineering meets Problem-based Learning
(2003)
Delaney, J. Declan; Mitchell, George; Delaney, Sean
Abstract:
A problem-driven approach for teaching software engineering to undergraduate students is entering its third year at the Department of Computer Science at NUI, Maynooth.
http://eprints.nuim.ie/199/
Marked
Mark
Biotechnology, life sciences and control engineering:some synthesis issues
(2007)
O'Dwyer, Aidan
Biotechnology, life sciences and control engineering:some synthesis issues
(2007)
O'Dwyer, Aidan
Abstract:
The synthesis of biotechnology, life sciences and control engineering is receiving increasing interest. The purpose of this contribution (and the associated poster) is to raise awareness of some of this synthesis work.
http://arrow.dit.ie/engscheleart/76
Marked
Mark
Analysis of assessment strategies used in a Level 7, Year 1 engineering subject
(2009)
O'Dwyer, Aidan
Analysis of assessment strategies used in a Level 7, Year 1 engineering subject
(2009)
O'Dwyer, Aidan
Abstract:
This contribution critically analyses the assessment strategies used on the core Electrical Systems subject in the first year of a three-year, Level 7, degree programme in Electrical Engineering at Dublin Institute of Technology. An evidence-based approach is taken, by analysing the assessment data in detail.
http://arrow.dit.ie/engscheleart/117
Marked
Mark
Relationship-Driven Policy Engineering for Autonomic Organisations
(2005)
FEENEY, KEVIN; LEWIS, DAVID; O'SULLIVAN, DECLAN; QUINN, KARL ANDREW; WADE, VINCENT...
Relationship-Driven Policy Engineering for Autonomic Organisations
(2005)
FEENEY, KEVIN; LEWIS, DAVID; O'SULLIVAN, DECLAN; QUINN, KARL ANDREW; WADE, VINCENT PATRICK
Abstract:
Autonomic systems are needed to self-manage the increasing complexity of pervasive communications access and the ubiquitous computing services it offers to humans. Policy based governance is the means by which humans will impose their will upon how autonomic systems manage themselves. Ultimately, these systems mediate information and services between people, in a rich tapestry of human associations formed though personal, commercial, and civic relationships. Therefore, if policies are to accurately reflect the wishes of their human authors, the process of authoring or engineering them must closely reflect the intricacies and fluidity of human relationships. We see this as the route to providing intuitive use of policy systems and thus to autonomic systems in empowering their users. We have previously presented a scheme for community-based management that addressed the dynamic organizational aspects of human relations in policy authoring. In this paper we review developments with thi...
http://hdl.handle.net/2262/27046
Marked
Mark
Factor substitution and demand for labour in the Northern Ireland engineering industry
(1972)
Glass, J. C.
Factor substitution and demand for labour in the Northern Ireland engineering industry
(1972)
Glass, J. C.
Abstract:
The following analysis is not concerned with the question of what products should be produced in Northern Ireland, or what techniques of production should be used—rather it attempts to evaluate the existing policy of capital subsidisation in terms of its "potential" effect on the demand for labour in the Northern Ireland engineering industry. The purpose of the present study is co determine the effect, on employment, of the change in relative factor prices, (and where necessary to indicate the change in output required to offset this effect).
http://hdl.handle.net/2262/6997
Marked
Mark
Time averaged and fluctuating heat transfer measurements in an atomising mist jet nozzle
(2009)
PERSOONS, TIM; MURRAY, DARINA BRIDGET
Time averaged and fluctuating heat transfer measurements in an atomising mist jet nozzle
(2009)
PERSOONS, TIM; MURRAY, DARINA BRIDGET
Abstract:
Much is already known about the heat transfer characteristics of impinging air jets, and they are widely used in many engineering applications. There currently exist many correlations describing such characteristics. However, the complex internal structure of many nozzles can lead these to produce results which deviate from those predicted by correlations. One such nozzle is currently used in this research group to produce a water mist flow and this paper describes the experimental characteristics of its single phase behaviour.
http://hdl.handle.net/2262/39271
Marked
Mark
The effect of pore size on permeability and cell attachment in collagen scaffolds for tissue engineering.
(2007)
PRENDERGAST, PATRICK JOHN; O'BRIEN, FERGAL
The effect of pore size on permeability and cell attachment in collagen scaffolds for tissue engineering.
(2007)
PRENDERGAST, PATRICK JOHN; O'BRIEN, FERGAL
Abstract:
The permeability of scaffolds and other three-dimensional constructs used for tissue engineering applications is important as it controls the diffusion of nutrients in and waste out of the scaffold as well as influencing the pressure fields within the construct. The objective of this study was to characterize the permeability/fluid mobility of collagen-GAG scaffolds as a function of pore size and compressive strain using both experimental and mathematical modeling techniques. Scaffolds containing four distinct mean pore sizes (151, 121, 110, 96 microns) were fabricated using a freeze-drying process. An experimental device was constructed to measure the permeability of the scaffold variants at different levels of compressive strain (0, 14, 29 and 40% while a low-density open-cell foam cellular solids model utilizing a tetrakaidecahedral unit cell was used to accurately model the permeability of each scaffold variant at all level of applied strain. The results of both the experimental...
http://hdl.handle.net/2262/39607
Marked
Mark
Design and Validation of a Force Measurement System for the Analysis of Airfoil Lift and Drag Characteristics
(2010)
Manning, Niall
Design and Validation of a Force Measurement System for the Analysis of Airfoil Lift and Drag Characteristics
(2010)
Manning, Niall
Abstract:
One of the aims of this research was to reduce the flow separation and therefore the pressure drag generated by a wing section, through the adding of surface modifications. The modifications consisted of roughening the surface of polystyrene airfoils using a sand blasting technique, which resulted in a dimpled surface. This idea originated from the design of a golf ball, as the dimples are known to delay flow separation which allows the ball to travel further. In relation to wing design, there has been very little research available that either proved or dismissed the theory of using a roughened airfoil surface to reduce the pressure drag created by flow separation. Therefore three types of airfoils were tested, the NACA 0006, 0024 and 4424 profiles. Different levels of surface roughness, created by the dimples, were applied to various portions and sides of the airfoils. These were in turn tested on the three airfoil types, including a series of tests with a split flap configuration...
http://doras.dcu.ie/15735/
Marked
Mark
Chemical engineering in an unsustainable world: obligations and opportunities
(2009)
Byrne, Edmond P.; Fitzpatrick, John J.
Chemical engineering in an unsustainable world: obligations and opportunities
(2009)
Byrne, Edmond P.; Fitzpatrick, John J.
Abstract:
Accepted Version
Human society faces a set of unprecedented challenges emanating from the unsustainable nature of the current societal model. The creation of a new sustainable societal construct is required, essentially adopting a needs based approach over one based on ever increasing consumption. Failure to achieve this will result in the widespread destruction of our increasingly stressed environment followed quickly by inevitable collapse of society as we know it, both socially and economically. Technology alone is insufficient to meet the challenges at hand; ecological, social and economic considerations must be incorporated through a multi-faceted and multi-disciplinary approach. Because chemical engineers possess a core set of threshold concepts which are central to a sustainable society, and because engineers will ultimately help design any new society, they bear a moral and ethical responsibility to play an active and indeed central role in its development. A new engine...
http://hdl.handle.net/10468/344
Marked
Mark
Mechanical characterisation of a customised decellularized scaffold for vascular tissue engineering
(2012)
MURPHY, BRUCE; DUFFY, GARRY; SHERIDAN, WILLIAM STEPHEN
Mechanical characterisation of a customised decellularized scaffold for vascular tissue engineering
(2012)
MURPHY, BRUCE; DUFFY, GARRY; SHERIDAN, WILLIAM STEPHEN
Abstract:
Several challenges persist when attempting to utilise decellularized tissue as a scaffold for vascular tissue engineering. Namely: poor cell infiltration/migration, excessive culture times associated with repopulating the scaffolds, and the achievement of a quiescent medial layer. In an attempt to create an optimum vascular scaffold we customised the properties of decellularized porcine carotid arteries by: (i) creating cavities within the medial layer to allow direct injection of cells, and (ii) controlling the amount of collagen digestion to increase the porosity. Histological examination of our customised scaffold revealed a highly porous tissue structure containing consistent medial cavities running longitudinally through the porous scaffold wall. Mechanical testing of the customised scaffold showed that our minimal localised disruption to the ECM does not have a detrimental effect on the bulk mechanical response of the tissue. The results demonstrate that an increased stiffness...
http://hdl.handle.net/2262/62425
Marked
Mark
Engineering Science as Opposed to Natural and Applied Science
(2007)
Coyle, Eugene; Murphy, Mike; Grimson, William
Engineering Science as Opposed to Natural and Applied Science
(2007)
Coyle, Eugene; Murphy, Mike; Grimson, William
Abstract:
<p>In exploring the epistemology of engineering science we propose a model of engineering. This model incorporates the goals of engineering, the approach to engineering (also called the engineering method) and the role of experience in engi-neering. The basis for understanding the nature of engineering science will be ex-plored, and will be contrasted with natural science. To begin, a large-scale engi-neering project that was successfully completed in Ireland many years ago is dis-cussed - specifically, the development of a megalithic passage tomb as an exemplar of the engineering method in structural design, project management and aesthetics. This exemplar firmly demonstrates that engineering method existed before the de-velopment and understanding of the relevant natural science. We next contrast the nature of engineering or engineering science and natural science. This discussion will further develop the engineering model, but will contrast the philosophical dif-ferences be...
http://arrow.dit.ie/engschelebk/2
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Mark
Real-World Process Design for Mechanical Engineering Students: A Case Study of PBL in DIT
(2008)
Delaney, Kevin; Kelleher, John B
Real-World Process Design for Mechanical Engineering Students: A Case Study of PBL in DIT
(2008)
Delaney, Kevin; Kelleher, John B
Abstract:
<p>Engineering education deals primarily with calculating quantitative performance of engineering objects, such as machines, circuits or dams, and with designing variations of these objects. However when engineering graduates enter the workforce they must be able to do a great deal more than solve the technical problems taught in engineering school [1]. More specifically they will need to deal with a great range of problems some of which are not technical engineering problems at all. Examples of such problems include working as part of a larger group, project management, negotiation, component sourcing and an awareness of the multi-disciplinary nature of engineering. Such real-world engineering problems force graduate engineers to draw on their professional and personal resourcefulness, adapt to on-the-job pressure, cope with people problems and broaden their knowledge base. Increased competition and high labour costs put pressure on engineering graduates to contribute to comp...
http://arrow.dit.ie/engschmeccon/16
Marked
Mark
Proceedings of the International Symposium for Engineering Education, ISEE-08
(2008)
Proceedings of the International Symposium for Engineering Education, ISEE-08
(2008)
http://doras.dcu.ie/606/
Marked
Mark
European and American Perspectives on Engineering Technology vs Engineering Degrees
(2007)
Dyrenfurth, Michael; Murphy, Mike; Herrick, Robert; Hamann, Manfred
European and American Perspectives on Engineering Technology vs Engineering Degrees
(2007)
Dyrenfurth, Michael; Murphy, Mike; Herrick, Robert; Hamann, Manfred
http://arrow.dit.ie/engineduccon/9
Marked
Mark
Liberal Studies in Engineering and Technology
(2009)
Grimson, William; Dyrenfurth, Michael; Murphy, MIke
Liberal Studies in Engineering and Technology
(2009)
Grimson, William; Dyrenfurth, Michael; Murphy, MIke
http://arrow.dit.ie/engineducbks/3
Marked
Mark
A Systematic Approach Towards Developing a Philosophy of Engineering: Engineers Dancing with Philosophers
(2008)
Murphy, Mike
A Systematic Approach Towards Developing a Philosophy of Engineering: Engineers Dancing with Philosophers
(2008)
Murphy, Mike
http://arrow.dit.ie/engineducpres/3
Marked
Mark
The Challenges in Engineering and Society
(2009)
Christensen, Steen Hyldgaard; Delahousse, Bernard; Meganck, Martin; Murphy, Mike
The Challenges in Engineering and Society
(2009)
Christensen, Steen Hyldgaard; Delahousse, Bernard; Meganck, Martin; Murphy, Mike
http://arrow.dit.ie/engineducbks/4
Marked
Mark
Engineering Education in the US and the EU
(2009)
Coyle, Eugene
Engineering Education in the US and the EU
(2009)
Coyle, Eugene
Abstract:
<p>Systems for the education of engineers in the US and the EU differ in significant ways. In this chapter we describe and reflect upon differences in accreditation policies and procedures, curriculum structure and content, admissions criteria and student mobility. Within the US there is a surprising uniformity among both private and public university programmes in engineering education, due in large part to the acceptance of ABET’s (Accreditation Board for Engineering and Technology) authority in setting standards for curriculum content. Within the EU there is greater programme variety, although some degree of harmonization is in the works due to the Bologna Declaration. We describe and analyze current efforts in Europe aimed at establishing a pan-EU authority for accreditation - the EUR- ACE Framework. One topic in curriculum structure draws our attention - the perceived value of liberal studies in engineering and the potential for significant reform of the engineering curri...
http://arrow.dit.ie/ahfrcbks/2
Marked
Mark
Systematic literature reviews in software engineering: preliminary results from interviews with researchers
(2011)
Ali Babar, Muhammad; Zhang, He
Systematic literature reviews in software engineering: preliminary results from interviews with researchers
(2011)
Ali Babar, Muhammad; Zhang, He
Abstract:
Systematic Literature Reviews (SLRs) have been gaining significant attention from software engineering researchers since 2004. Several researchers have reported their experiences of and lessons learned from applying systematic reviews to different subject matters in software engineering. However, there has been no attempt at independently exploring experiences and perceptions of the practitioners of systematic reviews in order to gain an in-depth understanding of various aspects of systemic reviews as a new research methodology in software engineering. We assert that there is a need of evidence-based body of knowledge about the application of systematic reviews in software engineering. To address this need, we have started an empirical research program that aims to contribute to the growing body of knowledge about systematic reviews in software engineering. This paper reports the design, logistics, and results of the first phase empirical study carried out in this program. The resul...
http://hdl.handle.net/10344/1151
Marked
Mark
A case study : problem based learning for civil engineering students in transportation courses
(2010)
Ahern, Aoife
A case study : problem based learning for civil engineering students in transportation courses
(2010)
Ahern, Aoife
Abstract:
This paper describes 2 case studies where problem based learning has been introduced to undergraduate civil engineering students in University College Dublin. Problem based learning has recently been put in place in the penultimate and final year transport engineering classes in the civil engineering degree in University College Dublin. In this case study, the paper describes how PBL was introduced, the impacts of its introduction and the feedback received by students regarding PBL. PBL was introduced in these years to help students to become deep and active learners and to help them in the transition from passive note taker to researcher and lifelong learner.
http://hdl.handle.net/10197/2872
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A comparative study of shear stresses in collagen-GAG and calcium phosphate scaffolds in bone tissue-engineering bioreactors
(2008)
KELLY, DANIEL
A comparative study of shear stresses in collagen-GAG and calcium phosphate scaffolds in bone tissue-engineering bioreactors
(2008)
KELLY, DANIEL
Abstract:
The increasing demand for bone grafts combined with their limited availability and potential risks has led to much new research in bone tissue engineering. Current strategies of bone tissue engineering commonly utilize cell-seeded scaffolds and flow perfusion bioreactors to stimulate the cells to produce bone tissue suitable for implantation into the patient’s body. The aim of this study was to quantify and compare the wall shear stresses in two bone tissue engineering scaffold types (collagen-GAG and calcium phosphate) exposed to fluid flow in a perfusion bioreactor. Based on μCT images, 3D numerical CFD models of the two scaffold types were developed to calculate the wall shear stresses within the scaffolds. For a given flow rate (normalized by the crosssectional area of the scaffolds), shear stress is 2.8-fold higher in the collagen- GAG than the calcium-phosphate scaffold. This is due to the differences in scaffold geometry, particularly the pore size (collagen-GAG pore size ~96...
http://hdl.handle.net/2262/29126
Marked
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Employer and student perspectives on skills for engineers in the twenty first century and beyond
(2010)
Naher, Sumsun; McMorrow, Denise; Brabazon, Dermot
Employer and student perspectives on skills for engineers in the twenty first century and beyond
(2010)
Naher, Sumsun; McMorrow, Denise; Brabazon, Dermot
Abstract:
This research focused on skills identified among final year engineering students. It provided evidence of different levels of skills by students and identifies their greatest learning influences in these areas. The skills were self-assessed by students and covered seven areas designated by Engineers Ireland. Competency levels such as science, software, creativity, engineering practice, social and business, ethics, discipline specific were assessed. It also investigated the important role that work placements play in skills developed by students. Key skills sought by leading Engineering firms from graduates now and in the next five years were also researched in this paper. Employers were surveyed to determine and investigate skills needed from graduate engineers and how best to meet these challenges. The emphasis on work placements and its impact on skills’ development in engineering students such as business acumen and working effectively and efficiently in industry were highlighted.
http://doras.dcu.ie/15635/
Displaying Results 76 - 100 of 3231 on page 4 of 130
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