Digital Commons Network^™

Dit Independent, 1st.-31st. Of March, 2000, Dit:Students Union

DIT Student Union

No abstract provided.

Bs News

Building Services Engineering

No abstract provided.

Dit Independent, 1st.-29th Of February, 2000, Dit:Students Union

DIT Student Union

No abstract provided.

Bs News

Building Services Engineering

No abstract provided.

Development Of Exponential-Fitted Numerical Methods For Building Energy Simulation, Michael Crowley, Saleem Hashmi

Conference papers

Simulation of energy flows in buildings is computationally intensive. Consequently, improvements in computing power and algorithm efficiency can always be utilized. Commonly used implicit solvers require extensive matrix processing while standard explicit methods have limited stability and progress in very small time increments. In this work, a number of stable numerical methods are examined which are explicit in nature and therefore do not require the use of matrices. One such algorithm and two proposed developments of it are assessed using a building related test problem prepared for this purpose, and their performances are compared with that of an efficient implicit …

2000 - 2001 : Part - Time Courses, Dublin Institute Of Technology

DIT Publications

Directory of over 250 courses which the DIT offers to students wishing to undertake part -time study.

Book includes student information and regulations and details of what courses each faculty offers.

On Cultural And Structural Change In Rte Television Drama, Edward Brennan

Articles

No abstract provided.

The Integration And Recruitment Of Women To The Irish Defence Forces, Tom Clonan

Books/Book chapters

Having examined the trend for a greater integration of women in the international military, it is intended in this chapter to examine the integration and recruitment of women in the PDF. This represents the beginning of the main focus of the study. The documentary, statistical and interview data presented in the next four chapters form the bulk of the analysis of the status and roles assigned female personnel in the PDF. The analysis of status and role of women within the organisation is organised in the subsequent chapters as follows: 1. Role of female personnel It is intended to establish …

Improved Direct Solver For Building Energy Simulation, Michael Crowley, Saleem Hashmi

Articles

Finite difference methods, when applied to the differential equations modelling energy flows in buildings, give rise to a system of non-linear difference equations. A frequently used direct solution method involving linearization is analysed and a related method proposed. These and one other connected method are compared using a building related test problem prepared for this purpose. The proposed numerical method is found to produce least error, about 30% less than the commonly used method, and it is recommended for inclusion in building energy simulation software. A fundamental method for estimating the pre conditioning period of a building, arising from the …

Small Planar Monopole Covers Multiband Brans, Max Ammann, L. E. Doyle

Conference papers

The use of a single antenna which can cover a wide range of frequencies is a desirable feature for future wireless communications systems. The emerging self-organising and ad-hoc networks require more than an octave of bandwidth to facilitate multiband operation. A shorted planar monopole antenna is optimised for future wireless networking bands by suitable choice of planar dimension and feedgap separation. The antenna offers a return-loss greater than 10 dB from 1.60 GHz to 5.90 GHz. The radiation pattern is shown to be quasi-omnidirectional within the 10 dB return-loss bandwidth. Antenna properties are compared with the simple planar monopole.

The Deployment Of Female Personnel Within The Irish Armed Forces, Tom Clonan

Books/Book chapters

This chapter deals with the deployment of women throughout the Defence Forces over its primary (combat) and secondary (support) roles. It is intended on this basis to establish whether or not a gender division of labour exists within the PDF. It is intended to examine this phenomenon through an examination of PDF policy on deployment at home and abroad, and the Defence Forces Board Report on policy for the deployment of female personnel. This documentary analysis of PDF policies is complemented by a simple analysis of deployment statistics provided by enlisted personnel section at DFHQ. These statistics are then reviewed …

Charter On Staff Development For 2000 And Beyond ; Pamphlet, Dublin Institute Of Technology

DIT Publications

No abstract provided.

Convergence Of Parameter And Delay Estimates Using Open Loop Time Domain Gradient Methods, Aidan O'Dwyer, John Ringwood

Conference papers

This paper discusses the estimation of the parameters of a single input, single output (SISO) process, modelled in first order lag plus delay (FOLPD) form, using gradient methods in the open loop time domain. The paper considers the convergence of the process parameters to the model parameters. The convergence of the model delay is discussed first, when the non-delay model and process parameters are identical. The convergence of all of the model parameters is then considered, when all of the process parameters are unknown.

The Software Quality Star (Sq-Star), Ronan Fitzpatrick

Other resources

Usability is a significant factor in the creation of quality software products which is an important focus of the software engineering syllabus. Usability is also a significant factor in the study of Human-Computer Interaction (HCI). Despite the connection, software quality and the rigours of the software engineering discipline are not used in the teaching of HCI and visa versa. Consequently, students undertaking software engineering courses are not fully exposed to usability issues and HCI students often miss out on the disciplines of software engineering. This paper presents a quality focused conceptual model - the Software Quality Star - which can …

Micro-Raman Study Of Stress Distribution Generated In Silicon During Proximity Rapid Thermal Diffusion, M. Nolan, T. Perova, R. A. Moore, C. J. Moore, Kevin Berwick, H. S. Gamble

Articles

proximity rapid thermal diffusion (RTD). A compressive stress was found on the whole silicon wafer after 15 s RTD. After 165 s RTD, the distribution of the stress across the wafer was found to be different: compressive at the edge and tensile at the middle. Thermal stress was relieved in the RTD wafers via slip dislocations. These slip dislocations were observed in the product wafers using optical microscopy. Slip lines propagated from the wafer edge to the wafer centre in eight preferred positions of maximum induced stress. The thermally induced stress and the slip dislocation density increased with time spent …

Structural Properties And Stress Analysis Of Sio2 Thin Films, G. Joyce, C. Moore, T. S. Perova, C. Beitia, A. Kocot, Kevin Berwick, Hugh Byrne, J. M. Mcgilp

Conference papers

Wet and dry oxidations of (111) crystalline silicon wafers were performed at temperatures between 900°C and 1150°C and subsequently annealed at 700°C. Process parameters such as the withdrawal rate from the furnace and annealing time were varied and the effect on the oxide layer are discussed. The magnitude and nature of the stress in the wafers after thermal oxidation was analysed using micro-Raman spectroscopy. The Full Width at Half Maximum (FWHM) of the Raman peak at ~ 520 cm-1 was also analysed to extract information relating to crystal disorder and defect density caused by the oxidation process. The results obtained …

Scenario Building: A Suitable Method For Strategic Construction Industry Planning?, John Ratcliffe

Articles

This paper is primarily about the Scenario Method. How scenario building, planning or learning exercises can profitably be used to identify, develop and test alternative plans, policies and practices that might be proposed in exploring and preparing for strategic decision-making in the construction industry. The method has been widely used in business, industry and government for over thirty years as an unrivalled technique to learn about the future before it happens. The paper examines the principles, practice and pitfalls of Scenario Building with the prime aim of presenting the technique as one singularly relevant to the study of the construction …

Rotary Honing: A Variant Of The Taylor Paint-Scraper Problem, Christopher Hills, H. Moffatt

Articles

The three-dimensional Row in a corner of fixed angle α induced by the rotation in its plane of one of the boundaries is considered. A local similarity solution valid in a neighbourhood of the centre of rotation is obtained and the streamlines are shown to be closed curves. The effects of inertia are considered and are shown to be significant in a small neighbourhood of the plane of symmetry of the flow. A simple experiment confirms that the streamlines are indeed nearly closed; their projections on planes normal to the line of intersection of the boundaries are precisely the 'Taylor' …

Synthesis Of Thermally Stable, High Surface Area Anatase–Alumina Mixed Oxides, Suresh Pillai, Hareesh Us, Rajeshkumar S, Mukundan P, Kgk Warrier

Articles

No abstract provided.

Time Delayed Process Model Parameter Estimation: A Classification Of Techniques, Aidan O'Dwyer

Conference papers

An extensive though scattered literature exists on the estimation of the model parameters of time delayed processes. However, it is possible to identify themes that are common to many of the proposed techniques. The intention of this paper is to provide a framework against which the literature may be viewed.

A Summary Of Pi And Pid Controller Tuning Rules For Processes With Time Delay. Part 1: Pi Controller Tuning Rules, Aidan O'Dwyer

Conference papers

The ability of proportional integral (PI) and proportional integral derivative (PID) controllers to compensate many practical industrial processes has led to their wide acceptance in industrial applications. The requirement to choose either two or three controller parameters is perhaps most easily done using tuning rules. A summary of tuning rules for the PI control of single input, single output (SISO) processes with time delay is provided in this paper.

A Summary Of Pi And Pid Controller Tuning Rules For Processes With Time Delay. Part 2: Pid Controller Tuning Rules, Aidan O'Dwyer

Conference papers

The ability of proportional integral (PI) and proportional integral derivative (PID) controllers to compensate many practical industrial processes has led to their wide acceptance in industrial applications. The requirement to choose either two or three controller parameters is perhaps most easily done using tuning rules. A summary of tuning rules for the PID control of single input, single output (SISO) processes with time delay is provided in this paper.

Editorial: Mandatory Reporting Of Child Abuse In Ireland: Some Cautionary Comments, Niall Mcelwee

Irish Journal of Applied Social Studies

The last year of the previous Millennium saw the publication of the latest government document on mandatory reporting of child abuse titled the National Guidelines for the Protection and Welfare of Children. This issue has come to dominate the minds of social care workers and child protection and welfare professionals. This editorial is an edited version of research conducted for a conference on child abuse and sexual offences held in Waterford, Ireland. Mandatory reporting has become a mantra and is now part of a highly politicised debate in this country. It seems to me that mandatory reporting should not be …

Time, Space And Presences: Bangladeshi Girls' Friendships In An English Primary School, James G. Deegan

Irish Journal of Applied Social Studies

The study reported here examined what it is like to be and have friends and how developing conceptions of friendships become embedded in children's peer cultures. It took place in two mixed Year 5 and Year 6 classes in a Church of England Local Education Authority Aided (C of E 'N) primary school in a working-class neighbourhood in a university town in East Anglia, England. A conceptually-split core theme emerged. The core theme is children's enabling and constraining negotiation of friendships and ethnicity within their own tacitly agreed upon boundaries of absences and presences, space and time, and locale. Implications …

Electroanalysis Using Differential Pulse Methods And Stripping Techniques., Enda Howard

Masters

Application of a differential pulse waveform to a microelectrode or a rotating disk electrode results in a peaked response for amperometric redox reactions. Based on these observations models were proposed and tested for these methods. Simulations of the models were carried out by inputting the relevant equations into Microsoft Excel. The microelectrode study revealed a good correlation between one model and the numerical derivative of the current following a linear sweep potential waveform. Experimentally the derivative can be obtained numerically following a linear sweep. The alternative differential pulse waveform requires more sophisticated equipment and the response can be affected by …

Additional Quality Factors For The World Wide Web., Ronan Fitzpatrick

Conference papers

Web site development is maturing from the enthusiastic experimental practice of early years to a more professional discipline, addressing the needs of Web site visitors and owner organisations. Quality is central to this maturing and it is necessary to have a full understanding of the meaning of quality in the context of the ever-changing Web. This paper identifies five new quality factors for the Web (visibility, credibility, intelligibility, engagibility and differentiation), together with their characteristics and a checklist of enablers, which can be used by specifiers, designers, developers and evaluators to create quality Web sites.

Thickness Variation Of Self-Processing Acrylamide-Based Photopolymer And Reflection Holography, F. O'Neill, Justin Lawrence, J. Sheridan

Articles

There are many types of holographic recording material. The acrylamide-based recording material examined here has one significant advantage: it is self-processing. This simplifies the recording process and enables holographic interferometry to be carried out without the need for complex realignment procedures. However, the effect that the polymerization process has on the grating thickness must be examined. This question is fundamental to the material's use in holographic optical elements, as thickness variations affect the replay conditions of the produced elements. This paper presents a study of this thickness variation and reports for the first time the production of reflection holographic gratings …

Dead-Time Compensators: Performance And Robustness Issues, James Syder, Thomas Heeg, Aidan O'Dwyer

Conference papers

This paper will compare a number of PID and predictive controller strategies to compensate processes modelled in first order lag plus time delay (FOLPD) form. The performance and robustness of the resulting compensated systems are evaluated analytically (where appropriate) and in simulation.

Pid Compensation Of Time Delayed Processes: A Survey, Aidan O'Dwyer

Conference papers

An extensive literature exists on the PID compensation of time delayed processes. It is possible to identify themes that are common to many of the available techniques. The intention of the paper is to provide a framework against which the literature may be viewed.

The Story Of The Dublin Institute Of Technology, Thomas Duff, Joe Hegarty, Matthew Hussey

Books

The Dublin Institute of Technology (DIT) was statutorily established as an autonomous institution on 1 January 1993, under the Dublin Instute of Technology Act (1992). It was constituted from the six higher education colleges of the City of Dublin Vocational Education Committee. This book describes the evolution and accomplishments of the Institute from its beginnings 113 years ago, and includes its rapid academic developments over the past thirty years. The DIT is now a multi-level higher education institution with the largest enrolment of all the higher education institutions in the state - about 22,000 (10,500 full-time students, 4,000 apprentices and …