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Articles 7981 - 8010 of 9166
Full-Text Articles in Entire DC Network
Drum Source Separation Using Percussive Feature Detection And Spectral Modulation, Dan Barry, Derry Fitzgerald, Eugene Coyle, Robert Lawlor
Drum Source Separation Using Percussive Feature Detection And Spectral Modulation, Dan Barry, Derry Fitzgerald, Eugene Coyle, Robert Lawlor
Conference papers
This papers presents a method for the separation and resynthesis of drum sources from single channel polyphonic mixtures. The frequency domain technique involves identifying the presence of a drum using a novel percussive feature detection function, after which the short-time magniture spectrum is estimated and scaled according to an estimated time-amplitude function derived from the percussive measure. In addition to producing high quality separation results, the method described is also a useful pre-process for drum transcription techniques such as Prior Subspace Analysis in the presence of pitched instruments.
Multi Pitch Estimation By Using Iir Comb Filters, Mikel Gainza, Robert Lawlor, Eugene Coyle
Multi Pitch Estimation By Using Iir Comb Filters, Mikel Gainza, Robert Lawlor, Eugene Coyle
Conference papers
A technique for detecting the pitches of a polyphonic signal is presented. The system utilises modified IIR comb filters, which are generated to ensure that a null (stop band notches) exists at multiples of note frequencies and that a very flat pass band is present in the remain of the spectrum. Thus, the signal spectrum is not distorted after applying the filters to the audio signal, which is the case when using FIR comb filters. the presented approach improves upon an existing multi pitch detection model based on a FIR comb filter framework.
Introducing Pvspitch: A Pitch Tracking Opcode For Csound, Alan O'Cinneide
Introducing Pvspitch: A Pitch Tracking Opcode For Csound, Alan O'Cinneide
Conference papers
An accurate pitch tracker has many useful applications, whether for creating interactive electroacoustic compositions, music transcription, ethnomusicological research and numerous others. Designed for the Csound sound synthesis and signal processing language, PVSPITCH is an opcode that can be utilised for such purposes. The opcode performs a mathemathical analysis upon Csound's phase vocoder data streams and from this examination, ascertains what it determines to be the signal's pitch. The algorithm handles well many types of signals, including those missing various harmonics, even a fundamental, and also signals with inharmonic partials. The only signal restriction are that it be single voiced, strongly …
Generalised Prior Subspace Analysis For Polyphonic Pitch Transcription, Derry Fitzgerald, Matt Cranitch, Eugene Coyle
Generalised Prior Subspace Analysis For Polyphonic Pitch Transcription, Derry Fitzgerald, Matt Cranitch, Eugene Coyle
Conference papers
A reformulation of Prior Subspace Analysis (PSA) is presented, which restates the problem as that of fitting an undercomplete signal dictionary to a spectrogram. Further, a generalization of PSA is derived which allows the transcription of polyphonic pitched instruments. This involves the translation of a single frequency prior subspace of a note to approximate other notes, overcoming the problem of needing a separate basis function for each note played by an instrument. Examples are then demonstrated which show the utility of the generalised PSA algorithm for the purposes of polyphonic pitch transcription.
Shifted Non-Negative Matrix Factorisation For Sound Source Separation, Derry Fitzgerald, Matt Cranitch, Eugene Coyle
Shifted Non-Negative Matrix Factorisation For Sound Source Separation, Derry Fitzgerald, Matt Cranitch, Eugene Coyle
Conference papers
A shifted non-negative matrix factorisation algorithm is derived, which offers advantages over previous matrix factorisation techniques for the purposes of single channel source separation. It represents a sound source as translations of a single frequency basis function. These translations approximately correspond to notes played by an instrument. Results are presented for a set of synthetic data, and on a single channel recording of piano and clarinet. Though the system is aimed at musical recordings, the techniques can be applied to any data which contains shifted versions of an underlying factor, and so the algorithm could possibly be used in other …
Non-Negative Tensor Factorisation For Sound Source Separation, Derry Fitzgerald, Matt Cranitch, Eugene Coyle
Non-Negative Tensor Factorisation For Sound Source Separation, Derry Fitzgerald, Matt Cranitch, Eugene Coyle
Conference papers
An algorithm for Non-negative Tensor Factorisation is introduced which extends current matrix factorisation techniques to deal with tensors. The effectiveness of the algorithm is then demonstrated through tests on synthetic data. The algorithm is then employed as a means of performing sound source separation on two channel mixtures, and the separation capabilities of the algorithm demonstrated on a two channel mixture containing saxophone, strings and bass guitar.
Construct Ireland - Partial Fill Cavity Walls, Joseph Little
Construct Ireland - Partial Fill Cavity Walls, Joseph Little
Articles
An examination of whether it still deserves its best practice status in the Irish Construction Industry in light of higher U-Values, construction practices, recent research and cultural pressures.
Maintaining The Identity Of Dynamically Embodied Agents, Alan Martin, Gregory O'Hare, Brian Duffy, Bianca Schoen-Phelan, John Bradley
Maintaining The Identity Of Dynamically Embodied Agents, Alan Martin, Gregory O'Hare, Brian Duffy, Bianca Schoen-Phelan, John Bradley
Conference papers
Virtual agents are traditionally constrained in their embod- iment, as they are restricted to one form of body. We propose allowing them to change their embodiment in order to expand their capabili- ties. This presents users with a number of di±culties in maintaining the identity of the agents, but these can be overcome by using identity cues, certain features that remain constant across embodiment forms. This pa- per outlines an experiment that examines these identity cues, and shows that they can be used to help address this identity problem.
Intentional Embodied Agents, Alan Martin, Gregory M.P. O'Hare, Brian R. Duffy, John F. Bradley, Bianca Schoen-Phelan
Intentional Embodied Agents, Alan Martin, Gregory M.P. O'Hare, Brian R. Duffy, John F. Bradley, Bianca Schoen-Phelan
Conference papers
The notion of embodiment within a virtual environment and an intelligent agent could be intimately linked, in order to form a single Agent Chameleon. This paper presents an architecture for achieving this, while allowing agents freedom to chose an embodiment suitable to the task at hand..
Bi-Directional Ontology Versioning Bov, Siyang Zhao, Brendan Tierney
Bi-Directional Ontology Versioning Bov, Siyang Zhao, Brendan Tierney
Conference papers
his paper defines a new type of ontology versioning: Bi-directional Ontology Versioning: BOV. BOV provides bi-directional mappings and transformations between concepts in two ontology versions. BOV is identified by two levels mapping processes: linguistic mapping and structural mapping. BOV can satisfy the requirement of mapping in distributed environment.
Experiences Teaching Website Engagibility To Computer Science Students., Pan Liqiang, Bryan Duggan, Ronan Fitzpatrick
Experiences Teaching Website Engagibility To Computer Science Students., Pan Liqiang, Bryan Duggan, Ronan Fitzpatrick
Conference papers
In the second year of our degree program, DT228 students study a subject called Web Development. In this paper we describe our studio classroom based teaching approach to this subject and explain how using this approach has enabled us to expand the scope of the course to include the important concept of website engagibility. We present a summary of current theories on website engagibility and explain how we incorporated these theories into the course. We further describe an experiment which we carried out in order to encourage students to reflect on website engagibility and incorporate it into their continuous assessments.
Website Engagibility: A Step Beyond Usability., Ronan Fitzpatrick, Peter Smith, Brendan O'Shea
Website Engagibility: A Step Beyond Usability., Ronan Fitzpatrick, Peter Smith, Brendan O'Shea
Conference papers
There is a continuing need for quality eCommerce websites which satisfy their owner’s perspective of quality of design and visitor’s perspective of quality of use. More particularly there is a need for website owners to be able to specify what constitutes a website that will fully engage site visitors and consequently what needs to be designed into the website in order to insure return on investment. This paper argues that the term usability is inappropriate to quality websites and that website engagibility is a step beyond usability. The paper reports continuing research which seeks to identify the requirements of website …
Learning Games Programming With Dalek World., Bryan Duggan, Hugh Mcatamney, Fredrick Mtenzi
Learning Games Programming With Dalek World., Bryan Duggan, Hugh Mcatamney, Fredrick Mtenzi
Conference papers
From September 2005 the School of Computing in the DIT will offer an elective in computer games programming to final year computer science students. This paper demonstrates how students will learn games programming by developing a 3D FPS (First Person Shooter) called Dalek World. Dalek World is developed using Microsoft Visual Studio in C++ and was originally developed by the authors to learn games programming techniques themselves. In developing Dalek World, students will learn Euclidian geometry, 3D graphics programming, object orientated game design, level loading, physics, collision detection, the A* algorithm, perception and enemy AI using finite state machines.
Using The Crytek Game Engine In The Technological University Dublin, Hugh Mcatamney, Brendan O'Shea, Fredrick Mtenzi
Using The Crytek Game Engine In The Technological University Dublin, Hugh Mcatamney, Brendan O'Shea, Fredrick Mtenzi
Conference papers
It is envisaged that within the next 10 years. the Technological University Dublin (DIT), Ireland’s largest third level university, will move to a new campus in Grangegorman, located in the north inner city of Dublin This site is currently being used as a hospital. It has twelve listed buildings and is located in a densely populated urban community. This paper describes how the Crytek 3D Game engine is being used to create a game MOD (modification) of the current hospital site, how it will be used in the construction and public consultation process of the new campus and how students …
The Systematic Evaluation Of A Strategic Management Program In An Irish Institute Of Technology, Deirdre Lillis
The Systematic Evaluation Of A Strategic Management Program In An Irish Institute Of Technology, Deirdre Lillis
Conference papers
Higher Education Institutes (HEIs) worldwide are investing significant resources in strategic planning and self-evaluation programs to improve institutional performance and to meet external stakeholder demands. Little empirical evidence exists however which demonstrates that these programs are effective in leading to improvements in institutional performance, let alone shed light on the reasons why. This paper reports on the systematic evaluation of the effectiveness of a Strategic Management program in an Irish HEI over a five year period in leading to improvements in institutional performance.
Generating Estimates Of Classification Confidence For A Case-Based Spam Filter, Sarah Jane Delany, Padraig Cunningham, Donal Coyle, Anton Zamolotskikh
Generating Estimates Of Classification Confidence For A Case-Based Spam Filter, Sarah Jane Delany, Padraig Cunningham, Donal Coyle, Anton Zamolotskikh
Conference papers
Producing estimates of classification confidence is surprisingly difficult. One might expect that classifiers that can produce numeric classification scores (e.g. k-Nearest Neighbour, Na¨ıve Bayes or Support Vector Machines) could readily produce confidence estimates based on thresholds. In fact, this proves not to be the case, probably because these are not probabilistic classifiers in the strict sense. The numeric scores coming from k-Nearest Neighbour, Na¨ıve Bayes and Support Vector Machine classifiers are not well correlated with classification confidence. In this paper we describe a case-based spam filtering application that would benefit significantly from an ability to attach confidence predictions to positive …
Realising Electronic Purchasing In The Irish Construction Industry, Alan V. Hore, Roger West
Realising Electronic Purchasing In The Irish Construction Industry, Alan V. Hore, Roger West
Conference papers
The use of Information Communication Technologies (ICT) in construction purchasing has been sporadic and piecemeal. Very significant inefficiencies and problems still exist in both paper transactions and non-integrated electronic solutions. At the simplest level, the electronic transmission of business documents offers savings in paper and postage. By going a step further, businesses can make strides in communicating with their partners, at relatively low cost, through direct links between their computers. Existing ICT such as the Internet, Bar-Coding, Radio Frequency Tagging, Electronic Data Interchange (EDI), Electronic catalogs and Enterprise Resource Planning Software (ERP) have facilitated electronic commerce (EC) functionality within many …
The Benefits Of Deploying It In The Material Procurement In Ready Mix Concrete In The Irish Construction Industry, Alan V. Hore, Roger West
The Benefits Of Deploying It In The Material Procurement In Ready Mix Concrete In The Irish Construction Industry, Alan V. Hore, Roger West
Conference papers
The current methods of processing orders, deliveries and invoices of concrete products in the construction industry is enormously inefficient, with vast quantities of paperwork, duplication of effort, scanning, re-keying and resolving mismatches between purchase orders, delivery dockets and invoices. This paper sets out results of a survey which reveals attitudes to Information Communication Technologies (ICT) in supporting the purchasing process in construction. The drivers and barriers to ICT use in construction purchasing is discussed from both the contractor‟s and supplier‟s perspective. The paper goes on to describe the outcome of a pilot study in which the efficiencies are investigated arising …
Ecology, Morality And Synergism, Thomas Power
Ecology, Morality And Synergism, Thomas Power
Articles
This short essay looks at the views of unorthodox members of three professions. Richard Douthwaite an anti-growth economist, James Lovelock a "mythical" scientist, and Yoneji Masuda, a Japanese guru of the Information Technology age. All three assume a re-orientation of human thinking. Douthwaite's "moral society", Lovelock's "ecological society" and Masuda's "synergistic society" have little basis in reality, despite their intrinsic appeal. Despite the "high knowledge consumption" of an information age, predicted by Masuda, history teaches us that knowledge has always been used by man to gain power and not to better the lot of mankind. There is no reason to …
A Survey Of Electronic Purchasing Practice In Ireland: A Perspective For The Irish Construction Industry, Alan V. Hore, Roger West
A Survey Of Electronic Purchasing Practice In Ireland: A Perspective For The Irish Construction Industry, Alan V. Hore, Roger West
Conference papers
There are many millions of trading documents (such as purchase orders, delivery notes and invoices) currently exchanged on paper in business to business (B2B) transactions, each having to be re-keyed as they pass between different locations and computer applications. Existing Information Communications Technologies (ICTs) such as the Internet, Bar-Coding, Radio Frequency Tagging, Electronic Data Interchange (EDI), Electronic catalogs and Enterprise Resource Planning Software (ERP) have facilitated electronic commerce (EC) functionality within many business sectors. However, the adoption of such technologies in the Irish construction industry has been very slow with only limited evidence of their application. The results of a …
An Examination Of The Effect Of Organisational Culture Of The Implementation Of Public-Private Partnership (Ppp) In Ireland, Louis Gunnigan, David Eaton
An Examination Of The Effect Of Organisational Culture Of The Implementation Of Public-Private Partnership (Ppp) In Ireland, Louis Gunnigan, David Eaton
Conference papers
This paper is concerned with identifying the organisational issues causing difficulty in the use of PPP and assessing the impact of PPP implementation on the organisational culture in the Irish public and private sectors. The authors address this issue by mapping the PPP process for one project type and comparing this process with that carried out in traditional procurement. Process differences through use of PPP are identified and organisational issues that have potential to impact on PPP success are assessed. Whilst the study undertaken is not extensive, it provides insight for initiators of PPP projects into the organisational issues that …
Intelligent Simulation-Based Lot Scheduling Of Photolithography Toolsets In A Wafer Fabrication Facility, Amr Arisha, Paul Young
Intelligent Simulation-Based Lot Scheduling Of Photolithography Toolsets In A Wafer Fabrication Facility, Amr Arisha, Paul Young
Conference papers
Scheduling of a semiconductor manufacturing facility is one of the most complex tasks encountered. Confronted with a high technology product market, semiconductor manufacturing is increasingly more dynamic and competitive in the introduction of new products in shorter time intervals. Photolithography, being one of the processes repeated often, is a fabrication bottleneck. Lot scheduling within photolithography is a challenging activity where substantial improvements in factory performance can be made. The proposed scheduling methodology integrates two common approaches, simulation and artificial intelligence. Using detailed simulation modeling within a structured modeling method, a comprehensive model to characterize the photolithography process was developed. An …
Dit Independent , 1st.-31st. Of December, 2004, Dit:Students Union
Dit Independent , 1st.-31st. Of December, 2004, Dit:Students Union
DIT Student Union
No abstract provided.
Local Model Network Application In Control, Ruiyao Gao
Local Model Network Application In Control, Ruiyao Gao
Doctoral
The local model (LM) network is considered for the control of complex nonlinear systems. Both controller design and system analysis techniques are investigated for the Purpose of the development of an overall global controller with guaranteed stability and performance, based on the control methods and theories well developed for linear systems. In particular, the influence of the offset term of affine LM networks on the performance and stability of closed-loop systems is investigated. Assuming the system changes ‘slowly’ enough, an integrator can be utilised in the controller design by considering the offset term as ‘constant’. Gain-scheduled local controller (LC) networks …
Dit Independent, Issue 1, 1st.-30th. Of November, 2004, Dit:Students Union
Dit Independent, Issue 1, 1st.-30th. Of November, 2004, Dit:Students Union
DIT Student Union
No abstract provided.
Dit Independent, Issue 2, 1st.-30th. Of November, 2004, Dit:Students Union
Dit Independent, Issue 2, 1st.-30th. Of November, 2004, Dit:Students Union
DIT Student Union
No abstract provided.
Peer-To-Peer Searching And Sharing Of Electronic Documents, Paul Stacey
Peer-To-Peer Searching And Sharing Of Electronic Documents, Paul Stacey
Masters
Peer-to-peer systems have existed since the first incarnation of the Internet. In recent times the Internet has taken on a more hierarchical form, power has been taken away from the individual and placed in the hands of operators of large servers. However, with the re-emergence of p2p the individual is gaining more freedom. End users attached to the Internet now have the power to host and publish content through the user of p2p technologies. Peer-to-peer systems present significant design challenges and have opened up a floodgate of research in an effort to overcome some of the fundamental problems. This thesis …