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Author = Lawlor, Bob;
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Displaying Results 26 - 47 of 47 on page 2 of 2
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Integrating a PBL Pilot Module into an Electronic Engineering Programme
(2015)
Lawlor, Bob; McLoone, Seamus; Meehan, Andrew
Integrating a PBL Pilot Module into an Electronic Engineering Programme
(2015)
Lawlor, Bob; McLoone, Seamus; Meehan, Andrew
Abstract:
The Department of Electronic Engineering at Maynooth University, Ireland was established in 1999 and graduated its first cohort of engineers in 2004. In recent years, a number of faculty involved in the undergraduate electronic engineering programme have become interested in the use of problem-based learning in general and specifically in how to most effectively integrate PBL into the programme. We looked in detail at Aalborg University in Denmark where PBL has been used extensively in engineering and science education for over forty years. An engineering professor from Aalborg was invited to Maynooth in November 2011 and facilitated two PBL workshops, one aimed at the entire Maynooth University faculty and one customised specifically to an engineering education context. The following June, three faculty members from the department visited Aalborg University to observe first-hand the so-called Aalborg model which is often referred to in the literature as Project-Oriented Problem Bas...
http://mural.maynoothuniversity.ie/6808/
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Interdisciplinary Communication Skills - Facilitating Students from Different Disciplines to Learn with, from and about each other
(2014)
Lawlor, Bob; Farrell, Alison; Jordan, Anne; Strawbridge, Judith; Brabazon, Dermot; Case...
Interdisciplinary Communication Skills - Facilitating Students from Different Disciplines to Learn with, from and about each other
(2014)
Lawlor, Bob; Farrell, Alison; Jordan, Anne; Strawbridge, Judith; Brabazon, Dermot; Casey, Kevin; Coughlan, Ann
Abstract:
Our group project involves exploring interdisciplinary communication skills and collaborative learning across STEM disciplines. In order to examine the topic we completed a literature review and surveyed staff about their views on interdisciplinary communication and collaborative learning at undergraduate level. We also held two focus group sessions on the topic with staff from three institutions. Though one of our intended project outcomes was a design model for interdisciplinary approaches to communication skills, as a result of the literature review we have redefined our purposes and will instead, in the first instance, present guiding principles for the effective integration of interdisciplinary communication skills training into existing and future programmes. In this paper we outline the first draft of these principles which recognise interdisciplinary collaboration as a pedagogical ‘trading zone’ and see the development of communications between the disciplines as a necessary...
http://mural.maynoothuniversity.ie/5654/
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Multi pitch estimation by using modified IIR Comb Filters
(2005)
Gainza, Mikel; Lawlor, Bob; Coyle, Eugene
Multi pitch estimation by using modified IIR Comb Filters
(2005)
Gainza, Mikel; Lawlor, Bob; Coyle, Eugene
Abstract:
A technique for detecting the pitches of a polyphonic signal of presented. The system utilises modified IIR comb filters, which are generated to ensure that n 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 60 the audio signal, which is the case when using FIR comb filters. The presented approach improves upon an existing multi pitch detection model bared on an FIR comb filter framework,
http://mural.maynoothuniversity.ie/8807/
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Multi-Channel Audio Time-Scale Modification
(2005)
Dorran, David; Lawlor, Bob; Coyle, Eugene
Multi-Channel Audio Time-Scale Modification
(2005)
Dorran, David; Lawlor, Bob; Coyle, Eugene
Abstract:
Phase vecoder based approaches to audio time-scale modification introduce a reverberant artefact into the time scaled output. Recent techniques have been developed to reduce the presence of this artefact; however, these techniques have the effect of introducing additional issues relating to their application to multi-channel recordings. This paper addresses these issues by collectively analysing all channels prior to time-scaling each individual channel.
http://mural.maynoothuniversity.ie/8793/
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On Project Oriented Problem Based Learning (POPBL) for a First Year Engineering Circuits Project
(2014)
McLoone, Seamus; Lawlor, Bob; Meehan, Andrew
On Project Oriented Problem Based Learning (POPBL) for a First Year Engineering Circuits Project
(2014)
McLoone, Seamus; Lawlor, Bob; Meehan, Andrew
Abstract:
This paper describes a pilot study on incorporating a Project-Oriented Problem Based Learning (POPBL) educational model into a first year engineering degree programme, in the form of a circuits-based project. While many variations of PBL exist, our pilot model is closely aligned to the Aalborg PBL model. This paper describes how the traditional first year Bachelor of Engineering (BE) programme at the National University of Ireland Maynooth (NUIM) was modified to accommodate the POPBL model. It outlines the key features of the approach taken and presents a detailed evaluation of the pilot study. Both staff and students responded favourably to the adopted learning style. This paper also highlights the lessons learned from the implementation of the POPBL model.
http://mural.maynoothuniversity.ie/5652/
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Onset based audio segmentation for the Irish tin whistle
(2004)
Gainza, Mikel; Lawlor, Bob; Coyle, Eugene
Onset based audio segmentation for the Irish tin whistle
(2004)
Gainza, Mikel; Lawlor, Bob; Coyle, Eugene
Abstract:
A technique for segmenting tin whistle audio signals according to the position of the note onsets is presented. This method focuses on the characteristics of the tin whistle within Irish traditional music, customising a time-frequency based representation for detecting the instant when a note starts and releases. Musical ornamentation, such as cuts and strikes, are very common in Irish traditional music and are played during the onset stage. Taking advantage of this musical feature, a novel technique for improving the onset time estimation is also presented.
https://arrow.dit.ie/engscheleart/101
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Onset Based Audio Segmentation for the Irish Tin Whistle
(2004)
Gainza, Mikel; Lawlor, Bob; Coyle, Eugene
Onset Based Audio Segmentation for the Irish Tin Whistle
(2004)
Gainza, Mikel; Lawlor, Bob; Coyle, Eugene
Abstract:
A technique for segmenting tin whistle audio signals according to the position of the note onsets is presented. This method focuses on the characteristics of the tin whistle within Irish traditional music, customising a time-frequency based representation for detecting the instant when a note starts and releases. Musical ornamentation, such as cuts and strikes, are very common in Irish Traditional music and are played during the onset stage. Taking advantage of this musical feature, a novel technique for improving the onset time estimation is also presented.
http://mural.maynoothuniversity.ie/702/
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Onset Detection and Music Transcription for the Irish Tin Whistle
(2004)
Gainza, Mikel; Lawlor, Bob; Coyle, Eugene
Onset Detection and Music Transcription for the Irish Tin Whistle
(2004)
Gainza, Mikel; Lawlor, Bob; Coyle, Eugene
Abstract:
A technique for detecting tin whistle note onsets and transcribing the corresponding pitches is presented. This method focuses on the characteristics of the tin whistle within Irish traditional music, customising a time-frequency based representation for extracting the instant when a note starts and the music notation. Results show that the presented approach improves upon the existing energy based approaches in terms of the percentage of correct detections.
http://mural.maynoothuniversity.ie/697/
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Onset Detection using Comb Filters
(2005)
Gainza, Mikel; Lawlor, Bob; Coyle, Eugene
Onset Detection using Comb Filters
(2005)
Gainza, Mikel; Lawlor, Bob; Coyle, Eugene
Abstract:
A technique for detecting note onsets using FIR comb filters which have different filter delays is presented. The proposed onset detector focuses on the inharmonic characteristics of the onset component and the energy increases of the signal. Both properties are combined by utilising FIR comb filters on a frame by frame basis in order to obtain an onset detection functions, which is suitable for detecting slow onsets. The proposed approach improves upon existing methods in terms of the percentage of correct detections in signal processing.
https://arrow.dit.ie/argcon/13
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Onset detection using Comb Filters
(2005)
Gainza, Mikel; Coyle, Eugene; Lawlor, Bob
Onset detection using Comb Filters
(2005)
Gainza, Mikel; Coyle, Eugene; Lawlor, Bob
Abstract:
A technique for detecting note onsets using FIR comb filters which have different filter delays is presented. The proposed onset detector focuses on the inharmonic characteristics of the onset component and the energy increases of the signal. Both properties are combined by utilizing FIR comb filters on a frame by frame basis in order to obtain an onset detection function, which is suitable for detecting slow onsets. The proposed approach improves upon existing methods in terms of the percentage of correct detections in signals containing slow onsets.
http://mural.maynoothuniversity.ie/20/
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Onset Detection, Music Transcription and Ornament Detection for the Traditional Irish Fiddle
(2005)
Kelleher, Aileen; Fitzgerald, Derry; Gainza, Mikel; Coyle, Eugene; Lawlor, Bob
Onset Detection, Music Transcription and Ornament Detection for the Traditional Irish Fiddle
(2005)
Kelleher, Aileen; Fitzgerald, Derry; Gainza, Mikel; Coyle, Eugene; Lawlor, Bob
Abstract:
By combining techniques used in previous onset detectors, a system that detects note onsets in traditional Irish fiddle tunes has been implemented. The notes detected also include the most common types of ornamentation played by the fiddle. Ornaments are notes of extremely short duration, at most a fifth the length of a regular note. A Short Time Fourier Transform based sub-band technique, which previously gave good results for the Irish tin whistle, was modified to include a threshold approximation more suitable for the fiddle. This system has been tested on a database of real recorded fiddle tunes and good results have been achieved.
http://mural.maynoothuniversity.ie/9762/
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Prior Subspace Analysis for Drum Transcription
(2003)
Fitzgerald, Derry; Lawlor, Bob; Coyle, Eugene
Prior Subspace Analysis for Drum Transcription
(2003)
Fitzgerald, Derry; Lawlor, Bob; Coyle, Eugene
Abstract:
This paper introduces the technique of Prior Subspace Analysis (PSA) as an alternative to Independent Subspace Analysis (ISA) in cases where prior knowledge about the sources to be separated is available. The use of prior knowledge overcomes some of the problems associated with ISA, in particular the problem of estimating the amount of information required for separation. This results in improved robustness for drum transcription purposes. Prior knowledge is incorporated by use of a set of prior frequency subspaces that characterise features of the sources to be extracted. The effectiveness and robustness of PSA is demonstrated by its use in a simple drum transcription algorithm.
http://mural.maynoothuniversity.ie/9760/
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Real-time Sound Source Separation: Azimuth Discrimination and Resynthesis
(2003)
Barry, Dan; Lawlor, Bob; Coyle, Eugene
Real-time Sound Source Separation: Azimuth Discrimination and Resynthesis
(2003)
Barry, Dan; Lawlor, Bob; Coyle, Eugene
Abstract:
We present a real-time sound source separation algorithm which performs the task of source separation based on the lateral displacement of a source within the stereo field. The algorithm exploits the use of the pan pot as a means to achieve image localisation within stereophonic recordings. As such, only an interaural intensity difference exists between left and right channels for a single source. Gain scaling and phase cancellation techniques are used in the frequency domain to expose frequency dependent nulls across the azimuth plane. The position of these nulls in conjunction with magnitude estimation and grouping techniques are then used to resynthesise separated sources. Results obtained from real recordings show that for music, this algorithm outperforms current source separation schemes.
http://mural.maynoothuniversity.ie/9761/
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Single Channel Source Separation using Short-time Independent Component Analysis
(2005)
Barry, Dan; Fitzgerald, Derry; Coyle, Eugene; Lawlor, Bob
Single Channel Source Separation using Short-time Independent Component Analysis
(2005)
Barry, Dan; Fitzgerald, Derry; Coyle, Eugene; Lawlor, Bob
Abstract:
In this paper we develop a method for the sound source separation of single channel mixtures usingIndependent Component Analysis within a time -frequency representation of the audio signal. We apply standard Independent Component Analysis techniques to contiguous magnitude frames of the short-time Fourier transform of the mixture.Provided that the amplitude envelopes of each source are sufficiently different, it can be seen that it is possible to recover the independent short-time power spectra of each souce.A simple scoring scheme based on auditory scene analysis cues is then used to overcome the source ordering problem ultimately allowing each of the independent spectra to be assigned to the correct source. A final stage of adaptive filtering is then applied which forces each of the spectra to become more independent. Each of the sources is then resynthesised using the standard inverse short-time Fourier transform with an overlap add scheme.
http://mural.maynoothuniversity.ie/723/
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Single-note Ornementation Transcription for the Irish Tin Whislte based on Onset Detection
(2004)
Gainza, Mikel; Coyle, Eugene; Lawlor, Bob
Single-note Ornementation Transcription for the Irish Tin Whislte based on Onset Detection
(2004)
Gainza, Mikel; Coyle, Eugene; Lawlor, Bob
Abstract:
Ornamentation plays a very important role in Irish Traditional music, giving more expression to the music by altering or embellishing small pieces of a melody. Single-note ornamentation, such as cuts and strikes, are the most common type in Irish Traditional music and are played by articulating the note pitch during the onset stage. A technique for transcribing single note ornamentation for the tin whistle based on onset detection is presented. This method focuses on the characteristics of the tin whistle within Irish traditional music, customising a time-frequency based representation for detecting the instant when new notes are played using single-note ornamentation start and release.
http://mural.maynoothuniversity.ie/695/
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Sound Source Separation: Azimuth Discrimination and Resynthesis
(2004)
Barry, Dan; Lawlor, Bob; Coyle, Eugene
Sound Source Separation: Azimuth Discrimination and Resynthesis
(2004)
Barry, Dan; Lawlor, Bob; Coyle, Eugene
Abstract:
In this paper we present a novel sound source separation algorithm which requires no prior knowledge, no learning, assisted or otherwise, and performs the task of separation based purely on azimuth discrimination within the stereo field. The algorithm exploits the use of the pan pot as a means to achieve image localisation within stereophonic recordings. As such, only an interaural intensity difference exists between left and right channels for a single source. We use gain scaling and phase cancellation techniques to expose frequency dependent nulls across the azimuth domain, from which source separation and resynthesis is carried out. We present results obtained from real recordings, and show that for musical recordings, the algorithm improves upon the output quality of current source separation schemes.
http://mural.maynoothuniversity.ie/8829/
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Sub-band Independent Subspace Analysis for Drum Transcription
(2002)
Fitzgerald, Derry; Coyle, Eugene; Lawlor, Bob
Sub-band Independent Subspace Analysis for Drum Transcription
(2002)
Fitzgerald, Derry; Coyle, Eugene; Lawlor, Bob
Abstract:
While Independent Subspace Analysis provides a means of separating sound sources from a single channel signal, making it an effective tool for drum transcription, it does have a number of problems. Not least of these is that the amount of information required to allow separation of sound sources varies from signal to signal. To overcome this indeterminacy and improve the robustness of transcription an extension of Independent Subspace Analysis to include sub-band processing is proposed. The use of this approach is demonstrated by its application in a simple drum transcription algorithm.
http://mural.maynoothuniversity.ie/8828/
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The Implementation and Evaluation of a Problem Based Learning Pilot Module in a First Year Electronic Engineering Programme
(2014)
Lawlor, Bob; McLoone, Seamus; Meehan, Andrew
The Implementation and Evaluation of a Problem Based Learning Pilot Module in a First Year Electronic Engineering Programme
(2014)
Lawlor, Bob; McLoone, Seamus; Meehan, Andrew
Abstract:
This study involved the design, implementation and evaluation of a group Problem-Based Learning (PBL) pilot module with a cohort of first year students on the BE in Electronic Engineering Programme in the Department of Electronic Engineering, National University of Ireland, Maynooth. The pilot module was implemented during semester 2 of the 2012/13 academic year and involved a total of 18 students working in 3 project groups. The self-selecting group sizes were 5, 6 and 7. The pilot module was based on the Aalborg PBL educational model but was adapted to take account of local contextual differences such as student demographics and prior experience of group project work. The pilot module was integrated into the second semester of a four-year conventional engineering programme such that the project theme was closely associated with previous and parallel taught module content while still allowing significant scope for student direction/ownership. The project module comprised one third ...
http://mural.maynoothuniversity.ie/5653/
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Time-scale modification of music using a subband approach based on the bark scale
(2003)
Dorran, David; Lawlor, Bob
Time-scale modification of music using a subband approach based on the bark scale
(2003)
Dorran, David; Lawlor, Bob
Abstract:
Time-domain time-scaling algorithms are efficient in comparison to their frequency-domain counterparts, but they rely upon the existence of a quasi-periodic signal to produce a high quality output. This requirement makes them unsuitable for use on multi-pitched signals such as polyphonic music. However, time-domain techniques applied on a subband basis can resolve the multi-pitch problem. We propose an improved subband implementation based upon the bark scale for the time-scale modification of music. The new subband approach is supported by psychoacoustic and music theory and subjectively through informal listening tests.
http://mural.maynoothuniversity.ie/8790/
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Time-scale modification of music using a synchronized subband/time-domain approach
(2004)
Dorran, David; Lawlor, Bob
Time-scale modification of music using a synchronized subband/time-domain approach
(2004)
Dorran, David; Lawlor, Bob
Abstract:
Time-domain audio time-scaling algorithms are efficient in comparison to their frequency-domain counterparts, but they rely upon the existence of a quasi-periodic signal to produce a high quality output. This requirement makes them unsuitable for direct application to complex multi-pitched signals such as polyphonic music. However, it has been shown that applying time-domain algorithms on a subband basis can resolve this issue. Existing subband/time-domain approaches result in a reverberant/phasy artifact being introduced into the output due to poor synchronization between time-scaled subbands. This paper presents a number of synchronization schemes that greatly reduce the amount of reverberation/phasiness introduced into the time-scaled output by existing subband/time-domain approaches.
http://mural.maynoothuniversity.ie/8827/
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Using Podcasts to support Communication Skills Development: A Case Study for Content Preferences among Postgraduate Research Students
(2010)
Lawlor, Bob; Donnelly, Roisin
Using Podcasts to support Communication Skills Development: A Case Study for Content Preferences among Postgraduate Research Students
(2010)
Lawlor, Bob; Donnelly, Roisin
Abstract:
The need for the integration of generic skills training into structured PhD programmes is widely accepted. However, effective integration of such training requires flexible delivery mechanisms which facilitate self-paced and independent learning. We video recorded an eminent speaker delivering a one-hour live presentation to a group of fifteen first-year science and engineering PhD research students. The topic of the presentation was inter-disciplinary professional communication skills. Following the presentation, we post-processed the video recording into seven alternative podcast formats. At a subsequent session, we showed the seven podcast formats to the fifteen students and carried out a survey to assess their reactions to the various formats. The survey results (quantitative and qualitative) were analyzed to give useful insight into the student preferences in relation to podcast formats. The students expressed a clear preference for summary key-point slides with explanatory voi...
http://mural.maynoothuniversity.ie/8787/
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Using Podcasts to support Communication Skills Development: A Case Study for Content Preferences among Postgraduate Research Students
(2010)
Donnelly, Roisin; Lawlor, Bob
Using Podcasts to support Communication Skills Development: A Case Study for Content Preferences among Postgraduate Research Students
(2010)
Donnelly, Roisin; Lawlor, Bob
Abstract:
The need for the integration of generic skills training into structured PhD programmes is widely accepted. However, effective integration of such training requires flexible delivery mechanisms which facilitate self-paced and independent learning. A video recording was made of an eminent speaker delivering a 1-h live presentation to a group of 15 first-year science and engineering PhD research students. The topic of the presentation was inter-disciplinary professional communication skills. Following the presentation, the video recording was post-processed into seven alternative podcast formats. These podcast formats included a typed transcription, a full audio recording, a full video recording, presentation slides with embedded speech etc. The choice of podcast formats was based on ease-of-production by a typical computer-literate academic and ease-of-use by a typical computer-literate student. At a subsequent session, the seven podcast formats were shown to the 15 students and a sur...
https://arrow.dit.ie/ltcart/30
Displaying Results 26 - 47 of 47 on page 2 of 2
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