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Articles 28861 - 28890 of 30043
Full-Text Articles in Entire DC Network
Solar Cell Efficiency Enhancement Through Down-Shifting And Up-Converting Layers: The Ephocell Project: Luminescent Downshifting Quantum Yield Measurements, M. Kennedy, L. Aubouy, D. Gutiérrez-Tauste, A. Jorge, M. Faccini, G. Noriega, M. Di Lorenzo, M. Cocca, M. Avella, M. Errico, G. Gentile, John Doran, Brian Norton, S. Baluschev, J. Bistué Guardiola, A. Robles Molina, J. Puigdollers, C. Voz, S. Daren, F. Tsvetkov, A. Pashov
Solar Cell Efficiency Enhancement Through Down-Shifting And Up-Converting Layers: The Ephocell Project: Luminescent Downshifting Quantum Yield Measurements, M. Kennedy, L. Aubouy, D. Gutiérrez-Tauste, A. Jorge, M. Faccini, G. Noriega, M. Di Lorenzo, M. Cocca, M. Avella, M. Errico, G. Gentile, John Doran, Brian Norton, S. Baluschev, J. Bistué Guardiola, A. Robles Molina, J. Puigdollers, C. Voz, S. Daren, F. Tsvetkov, A. Pashov
Conference Papers
Organic cells and dye-sensitized cells developed to-date have a narrow active absorption range, relative to the spectral range of the available solar resource. Their efficiency could be significantly enhanced through a process of down-shifting (DS) and up-conversion of non-absorbable photons converting them to photons better matching the spectral response of the particular solar cell. The DS molecules must exhibit a large Stokes shift and high luminescent quantum yield when incorporated in the downshifting polymer layer. In this paper, the QY of a downshifting Europium (III) complex in solution is determined using two distinct experimental techniques. The QY is measured for …
New Innovations In The Development Of Practice Placement Education For Student Dietitians, Martina Crehan, Mary Maloney, Maria Bowles, Clare Corish
New Innovations In The Development Of Practice Placement Education For Student Dietitians, Martina Crehan, Mary Maloney, Maria Bowles, Clare Corish
Level 3
This paper discusses the collaborative approach between the higher education institution and the practice placement educators on this work-based learning partnership. The partnership work has highlighted the need for an inclusive approach to all practice placement settings which facilitates the creation of a clear support structure for placement mentors/assessors. A standardised, explicit assessment process that contributes to progressive skills acquisition and the requirement that practice placement is fully integrated into the academic curriculum have, furthermore, been identified. Self-directed learning, self-assessment and reflective practice are professional skills which need to be viewed as outcomes of practice placement and the training of …
Integration, Alignment And Ict In Supply Chains, Edward Sweeney
Integration, Alignment And Ict In Supply Chains, Edward Sweeney
Other Resources
No abstract provided.
Supply Chain Management, Economic Volatility And Ict, Edward Sweeney
Supply Chain Management, Economic Volatility And Ict, Edward Sweeney
Other Resources
No abstract provided.
Changes In Intraocular Pressure And Anterior Segment Morphometry After Uneventful Phacoemulsification Cataract Surgery, J. Dooley, S. Charalampidou, A. Malik, James Loughman, L. Molloy, S. Beatty
Changes In Intraocular Pressure And Anterior Segment Morphometry After Uneventful Phacoemulsification Cataract Surgery, J. Dooley, S. Charalampidou, A. Malik, James Loughman, L. Molloy, S. Beatty
Articles
Purpose To study changes in anterior segment morphometry after uneventful phacoemulsification cataract surgery, and to investigate whether there is a relationship between any observed changes and intraocular pressure (IOP) reduction after the procedure. Methods The anterior chamber depth (ACD), anterior chamber volume (ACV), anterior chamber angle (ACA), central corneal thickness (CCT), and IOP were measured in 101 non-glaucomatous eyes before and after uneventful phacoemulsification cataract surgery. Results After cataract surgery, the mean ACD, ACV, and ACA values increased by 1.08mm, 54.4mm3, and 13.11, respectively, and the mean IOP (corrected for CCT) decreased by 3.2mmHg. The predictive value of a previously …
Macular Pigment Optical Density In An Aging Irish Population: The Irish Longitudinal Study On Ageing, John Nolan, Roseanne Kenny, Claire O'Regan, Hilary Cronin, James Loughman, Eithne Connolly, Patricia Kearney, Stephen Beatty
Macular Pigment Optical Density In An Aging Irish Population: The Irish Longitudinal Study On Ageing, John Nolan, Roseanne Kenny, Claire O'Regan, Hilary Cronin, James Loughman, Eithne Connolly, Patricia Kearney, Stephen Beatty
Articles
Purpose: The 3 carotenoids lutein, zeaxanthin, and meso-zeaxanthin, which account for the ‘yellow spot’ at the macula and which are referred to as macular pigment (MP), are believed to play a role in visual function and protect against age-related macular degeneration (AMD) via their optical and antioxidant properties. This study was undertaken to compare MP optical density (MPOD) in a population aged ≧50 years with MPOD values from a normative database of subjects aged 18–60 years. Methods: Seventy-nine subjects were recruited into this pilot study (The Irish Longitudinal Study on Ageing-TILDA). MPOD was measured using heterochromatic flicker photometry. Retinal fundus …
Macular Pigment And Its Contribution To Visual Performance And Experience [El Pigmento Macular Y Su Contribución Al Rendimiento Y Experiencia Visuals], James Loughman, Peter Davison, John M. Nolan, Mukunda C. Akkali, Stephen Beatty
Macular Pigment And Its Contribution To Visual Performance And Experience [El Pigmento Macular Y Su Contribución Al Rendimiento Y Experiencia Visuals], James Loughman, Peter Davison, John M. Nolan, Mukunda C. Akkali, Stephen Beatty
Articles
There is now a consensus, based on histological, biochemical and spectral absorption data, that the yellow colour observed at the macula lutea is a consequence of the selective accumulation of dietary xanthophylls in the central retina of the living eye. Scientific research continues to explore the function(s) of MP in the human retina, with two main hypotheses premised on its putative capacity to (1) protect the retina from (photo)-oxidative damage by means of its optical filtration and/or antioxidant properties, the so-called protective hypothesis and (2) influence the quality of visual performance by means of selective short wavelength light absorption prior …
An Investigation Of The Rwpe Prostate Derived Family Of Cell Lines Using Ftir Spectroscopy, M. Baker, Colin Clarke, D. Demoulin, J. Nicolson, Fiona Lyng, Hugh Byrne, C. Hart, M. Brown, N. Clarke, P. Gardner
An Investigation Of The Rwpe Prostate Derived Family Of Cell Lines Using Ftir Spectroscopy, M. Baker, Colin Clarke, D. Demoulin, J. Nicolson, Fiona Lyng, Hugh Byrne, C. Hart, M. Brown, N. Clarke, P. Gardner
Articles
Interest in developing robust, quicker and easier diagnostic tests for cancer has lead to an increased use of Fourier transform infrared (FTIR) spectroscopy to meet that need. In this study we present the use of different experimental modes of infrared spectroscopy to investigate the RWPE human prostate epithelial cell line family which are derived from the same source but differ in their mode of transformation and their mode of invasive phenotype. Importantly, analysis of the infrared spectra obtained using different experimental modes of infrared spectroscopy produce similar results. The RWPE family of cell lines can be separated into groups based …
Ultrasound-Assisted Swnts Dispersion: Effects Of Sonication Parameters And Solvent Properties, Qiaohuan Cheng, Sourabhi Debnath, Elizabeth Gregan, Hugh Byrne
Ultrasound-Assisted Swnts Dispersion: Effects Of Sonication Parameters And Solvent Properties, Qiaohuan Cheng, Sourabhi Debnath, Elizabeth Gregan, Hugh Byrne
Articles
Ultrasonication is widely used for preparing Single-Walled Carbon Nanotube (SWNT) dispersions in different solvent media and it has been shown to play a critical role in dispersing and debundling SWNTs. The strong shear force that can exfoliate the SWNT bundles during sonication comes from cavitation, which entails a process of bubble formation, growth, and collapse. The efficiency of the cavitation process is closely correlated to many solvent parameters, including vapor pressure, viscosity, and surface tension, as well as the sonication frequency, intensity, and time. In this study, SWNTs were dispersed in a range of organic solvents assisted by tip sonication. …
A Systematic Study Of The Dispersion Of Swnts In Organic Solvents, Qiaohuan Cheng, Sourabhi Debnath, Luke O'Neill, Theresa Hedderman, Elizabeth Gregan, Hugh Byrne
A Systematic Study Of The Dispersion Of Swnts In Organic Solvents, Qiaohuan Cheng, Sourabhi Debnath, Luke O'Neill, Theresa Hedderman, Elizabeth Gregan, Hugh Byrne
Articles
Dispersions of as-produced HiPco single-walled carbon nanotubes (SWNTs) in a series of organic solvents were prepared by dilution with the aid of tip sonication. Mild centrifugation (~ 945 g) was carried out to remove large bundles. Atomic force microscopy (AFM) studies revealed that the bundle size decreased as the dispersion was diluted. By measuring the UV-vis-NIR absorption before and after centrifugation as a function of the concentration, the dispersion limit of SWNTs in each solvent can be determined. Correlations between the dispersion limit and solvent solubility parameters, including the Hildebrand solubility parameter and three dimensional Hansen solubility parameters, are explored, …
Dit Teaching Fellowship Reports 2009-2010, Jen Harvey
Dit Teaching Fellowship Reports 2009-2010, Jen Harvey
Teaching Fellowships
No abstract provided.
Harmonizing Technology With Interaftion In Blended Problem-Based Learning, Roisin Donnelly
Harmonizing Technology With Interaftion In Blended Problem-Based Learning, Roisin Donnelly
Journal Articles
This paper discusses the harmonizing role of technology and interaction in a qualitative study on blended 22 problem-based learning within the context of academic development in higher education. Within this 23 setting, and as both designers and tutors in blended PBL, it is important to seek best practices for how 24 to combine instructional strategies in face-to-face and computer-mediated environments that take 25 advantage of the strengths of each and avoid their weaknesses. A qualitative study of the lived experi- 26 ences of 17 academic staff participants in a blended problem-based learning module was considered 27 likely to provide a …
Interaction Analysis In A ‘Learning By Doing’ Problem-Based Professional Development Context, Roisin Donnelly
Interaction Analysis In A ‘Learning By Doing’ Problem-Based Professional Development Context, Roisin Donnelly
Journal Articles
This paper explores the concept and practice of interaction within a blended problem-based learning (PBL) module for academic professional development in higher education. A qualitative study spanning two years of the lived experiences of 17 academic staff in a blended PBL module was considered likely to provide a much needed analysis of current thinking and practice on the potential of interaction. Relevant constructivist theories are applied to face-to-face PBL tutorials, online discussions, focus group interviews and reflective papers. For designers and tutors in blended PBL, it is important to seek best practices for how to combine instructional strategies in classroom …
Instructional Videocasts: Facilitating Learning In A Mobile World, Roisin Donnelly, Robert Hickey
Instructional Videocasts: Facilitating Learning In A Mobile World, Roisin Donnelly, Robert Hickey
Journal Articles
This paper critically discusses the new opportunities unique to the use of mobile platforms to complement formal learning with informal learning in an apprenticeship context. It begins with an outline of a problem identified by the teacher-researcher with phase six apprentice bricklaying students achieving psycomotor learning outcomes, mainly due to high student numbers and limited available workshop time. A solution to this problem is presented through the facilitation of the students using eleven short instructional video demonstrations on mobile phones to optimise their time. These were uploaded to the memory cards of the students’ mobile phones. Within an action research …
A Project-Based Learning Approach To Applied Craft Calculations Within Apprenticeship Education: An Action Research Study, Kevin Furlong
A Project-Based Learning Approach To Applied Craft Calculations Within Apprenticeship Education: An Action Research Study, Kevin Furlong
Theses
Using an Action Research methodology, this study was based in Technologicl University Dublin and conducted with the cooperation of three groups of Phase Six Plumbing apprentices over a ten-month period (three cycles). The main aim of the research project was to establish if a deeper understanding and application of Building Services Applied Calculations could be achieved through the implementation of Project-Based Learning within Apprenticeship Education? Research literature shows that not only in Ireland but also abroad, third level education is experiencing what is described as a ‘maths problem’. With applied calculations and mathematics being a fundamental and essential part of …
Using Crowdsourcing For Labelling Emotional Speech Assets, Alexey Tarasov, Sarah Jane Delany, Charlie Cullen
Using Crowdsourcing For Labelling Emotional Speech Assets, Alexey Tarasov, Sarah Jane Delany, Charlie Cullen
Conference papers
The success of supervised learning approaches for the classification of emotion in speech depends highly on the quality of the training data. The manual annotation of emotion speech assets is the primary way of gathering training data for emotional speech recognition. This position paper proposes the use of crowdsourcing for the rating of emotion speech assets. Recent developments in learning from crowdsourcing offer opportunities to determine accurate ratings for assets which have been annotated by large numbers of non-expert individuals. The challenges involved include identifying good annotators, determining consensus ratings and learning the bias of annotators.
An Evaluation Of A Community Dietetics Intervention On The Management Of Malnutrition For Healthcare Professionals, Sharon Kennelly, N. P. Kennedy, G. Flanaghan-Rughoobur, C. Glennon-Slattery, Sheila Sugrue
An Evaluation Of A Community Dietetics Intervention On The Management Of Malnutrition For Healthcare Professionals, Sharon Kennelly, N. P. Kennedy, G. Flanaghan-Rughoobur, C. Glennon-Slattery, Sheila Sugrue
Articles
Background: Healthcare professionals working in the community setting have limited knowledge of the evidence-based management of malnutrition. The present study aimed to evaluate a community dietetics intervention, which included an education programme for healthcare professionals in conjunction with the introduction of a community dietetics service for patients ‘at risk’ of malnutrition. Changes in nutritional knowledge and the reported management of malnourished patients were investigated and the acceptability of the intervention was explored. Methods: An education programme, incorporating ‘Malnutrition Universal Screening Tool (MUST)’ training, was implemented in eight of 10 eligible primary care practices (14 general practitioners and nine practice nurses …
Pk/Pd Modelling Of Comb-Shaped Pegylated Salmon Calcitonin Conjugates Of Differing Molecular Weights, Sinead Ryan, Jesus Maria Frias, David H. Haddleton, David J. Brayden
Pk/Pd Modelling Of Comb-Shaped Pegylated Salmon Calcitonin Conjugates Of Differing Molecular Weights, Sinead Ryan, Jesus Maria Frias, David H. Haddleton, David J. Brayden
Articles
Salmon calcitonin (sCT) was conjugated via cysteine-1 to novel combed-shaped end-functionalised poly(PEG) methyl ether methacrylate) (sCT-P) comb-shaped polymers, to yield conjugates of total molecular weights (MW) inclusive of sCT: 6.5, 9.5, 23 and 40 kDa. The conjugates were characterised by HPLC and their in vitro and in vivo bioactivity was measured by cAMP assay on human T47D cells and following intravenous (i.v.) injection to rats, respectively. Stability against endopeptidases, rat serum and liver homogenates was assessed. There were linear and exponential relationships between conjugate MW with potency and efficacy respectively, however the largest MW conjugate still retained 70% of E …
Visible Near-Infrared Hyperspectral Imaging For The Identification And Discrimination Of Brown Blotch Disease On Mushroom (Agaricus Bisporus) Caps, Edurne Gaston, Jesus Maria Frias, Patrick J. Cullen, Colm O’Donnell, Aoife Gowen
Visible Near-Infrared Hyperspectral Imaging For The Identification And Discrimination Of Brown Blotch Disease On Mushroom (Agaricus Bisporus) Caps, Edurne Gaston, Jesus Maria Frias, Patrick J. Cullen, Colm O’Donnell, Aoife Gowen
Articles
Brown blotch, caused by pathogenic Pseudomonas tolaasii (P. tolaasii), is the most problematic bacterial disease in Agaricus bisporus mushrooms. Although it does not cause any health problems, it reduces the consumer appeal of mushrooms in the market place, generating important economical losses worldwide. Hyperspectral imaging (HSI) is a non-destructive technique that combines imaging and spectroscopy to obtain information from a sample. The objective of this study was to investigate the use of HSI for brown blotch identification and discrimination from mechanical damage on mushrooms. Hyperspectral images of mushrooms subjected to i) no treatment, ii) mechanical damage or iii) …
Prediction Of Polyphenol Oxidase Activity Using Visible Near-Infrared Hyperspectral Imaging On Mushroom (Agaricus Bisporus) Caps., Edurne Gaston, Jesus Maria Frias, Patrick J. Cullen, Colm O'Donnell, Aoife Gowen
Prediction Of Polyphenol Oxidase Activity Using Visible Near-Infrared Hyperspectral Imaging On Mushroom (Agaricus Bisporus) Caps., Edurne Gaston, Jesus Maria Frias, Patrick J. Cullen, Colm O'Donnell, Aoife Gowen
Articles
Physical stress (i.e. bruising) during harvesting, handling and transportation triggers enzymatic discoloration of mushrooms, a common and detrimental phenomenon largely mediated by polyphenol oxidase (PPO) enzymes. Hyperspectral imaging (HSI) is a non-destructive technique that combines imaging and spectroscopy to obtain information from a sample. The objective of this study was to assess the ability of HSI to predict the activity of PPO on mushroom caps. Hyperspectral images of mushrooms subjected to various damage treatments were taken, followed by enzyme extraction and PPO activity measurement. Principal component regression (PCR) models (each with 3 PCs) built on raw reflectance and multiple scatter …
Effect Of Drying Method On The Antioxidant Capacity Of Six Larniaceae Herbs, M. Hossain, Catherine Barry-Ryan, Ana Belen Martin-Diana, N. Brunton
Effect Of Drying Method On The Antioxidant Capacity Of Six Larniaceae Herbs, M. Hossain, Catherine Barry-Ryan, Ana Belen Martin-Diana, N. Brunton
Articles
The present study investigated the changes in total phenols (TP), rosmarinic acid content and antioxidant capacity of six Lamiaceae herbs (rosemary, oregano, marjoram, sage, basil and thyme) after three drying treatments (air-, freeze- and vacuum oven-drying) stored for 60 days at −20 °C and compared to fresh samples. Ferric reducing antioxidant property (FRAP) and oxygen radical absorbance capacity (ORAC) were used as markers for antioxidant capacity. Air-dried samples had significantly (p < 0.05) higher TP, rosmarinic acid content and antioxidant capacity than had freeze-dried and vacuum oven-dried samples throughout the storage period. Fresh samples had the lowest values for the parameters tested. Vacuum oven-drying resulted in higher TP and FRAP values in rosemary and thyme during 60 days of storage than did freeze-drying. In ORAC assay, the difference was significantly higher only in thyme. Storage did not show any effect on the dried samples for the parameters tested.
Can We Be 'Friends'? Social Networking And Student Engagement In An Academic Environment, Mary O'Rawe
Can We Be 'Friends'? Social Networking And Student Engagement In An Academic Environment, Mary O'Rawe
Conference papers
Students’ methods of engagement in third level education are very different to those of a decade ago (Cloete, de Villiers & Roodt 2009). There are a number of factors impacting on these changes in students’ profiles, expectations and willingness to engage. One of these factors which is addressed by the author is the way in which students now use social networking tools to engage and communicate. Popular new technologies such as wikis, blogs and podcasts are now being used for academic purposes. But what are the roles of such tools? Do they merely aid staff-student communication and student-student communication, do …
Volume 12, 2010, Ellen Hazelkorn, Nora French, Wolfgang Truetzschler
Volume 12, 2010, Ellen Hazelkorn, Nora French, Wolfgang Truetzschler
Issues
No abstract provided.
Dit Graduate Exhibition Show Of The School Of Art, Design And Printing 2010, Dublin Institute Of Technology
Dit Graduate Exhibition Show Of The School Of Art, Design And Printing 2010, Dublin Institute Of Technology
DIT Publications
Exhibition committee staff Kieran Corcoran Peter Jones Paul White Robert Tully Neville Knott John Short Brenda Dermody Clare Bell Brenda Duggan Annette Buckley Pat Muldowny Joe Hanly Exhibition commitee student representatives Lucy Clarke Margaret Flynn Kate Geoghegan Gavin Gogarty Fiona O'Keeffe Cian McKenna Becky O'Hara Catalogue concept and design Paul Woods - www.paultheillustrator.com Maeve Keane - www.andstudio.ie Photography by Gillian Buckley. Typeset in DIN 9pt and 24pt. Printed on 140gsm Revive 50/50 by Future Print, Dublin. DIT Graduate Exhibition 2010
A Review Of Bast Fibres And Their Composites. Part 2 - Composites, John Summerscales, Nilmini Dissanayake, Amandeep Virk, Wayne Hall
A Review Of Bast Fibres And Their Composites. Part 2 - Composites, John Summerscales, Nilmini Dissanayake, Amandeep Virk, Wayne Hall
School of Engineering, Computing and Mathematics
Bast fibres are defined as those obtained from the outer cell layers of the stems of various plants. The fibres find use in textile applications and are increasingly being considered as reinforcements for polymer matrix composites as they are perceived to be "sustainable". The fibres are composed primarily of cellulose which potentially has a Young's modulus of similar to 140 GPa (being a value comparable with man-made aramid [Kevlar/Twaron] fibres). The plants which are currently attracting most interest are flax and hemp (in temperate climates) or jute and kenaf (in tropical climates). Part 2 of this review will consider the …
Context-Dependent Partitioning Of Motor Learning In Bimanual Movements, Ian S. Howard, James N. Ingram, Daniel M. Wolpert
Context-Dependent Partitioning Of Motor Learning In Bimanual Movements, Ian S. Howard, James N. Ingram, Daniel M. Wolpert
School of Engineering, Computing and Mathematics
No abstract provided.
The Role Of Stereotype Threat In The Underrepresentation Of Minority Students In Gifted Education, M. Erin Potter
The Role Of Stereotype Threat In The Underrepresentation Of Minority Students In Gifted Education, M. Erin Potter
Dissertations and Theses @ UNI
Stereotype threat is a social psychological phenomenon that has been demonstrated to negatively affect performance of individuals who are members of non-Asian ethnic minority groups in terms of academic achievement. Although these effects have been documented in adults, very few studies have examined stereotype threat in K-12 students. Further, it is not clear whether stereotype threat could negatively impact students' performance on standardized tests, such as those used for screening for gifted programs. The purpose of this study was to examine whether stereotype threat could be reduced in a sample of Caucasian and African-American middle-school students who were taking a …
Improving The Instruction And Learning Of Topographic Maps Through The Use Of Geospatial Technologies, Troy Dean Schwemm
Improving The Instruction And Learning Of Topographic Maps Through The Use Of Geospatial Technologies, Troy Dean Schwemm
Dissertations and Theses @ UNI
Geographic information technologies (GIT) are spatially based technologies that include geographic information systems (GIS), remote sensing, and global positioning systems (GPS). Though GIT has been used in society for decades, and has grown tremendously in the last 10 years as advancements in technology have become available, its inclusion into the K-12 curriculum has not kept pace. As the educational reform movement places an ever increasing amount of pressure on schools to produce technologically literate, workforce ready graduates, school districts are scrambling to find creative, innovative ways to accomplish this task. Rather than learning passively, GIT allows students to construct their …
Turning To Community In Times Of Crisis: Globally Derived Insights On Local Community Formation, Glen Kuecker, Martin Mulligan, Yaso Nadarajah
Turning To Community In Times Of Crisis: Globally Derived Insights On Local Community Formation, Glen Kuecker, Martin Mulligan, Yaso Nadarajah
History Faculty publications
No abstract provided.
A Novel Emulator For Discrete-Time Mimo Triply Selective Fading Channels, Fei Ren, Yahong Rosa Zheng
A Novel Emulator For Discrete-Time Mimo Triply Selective Fading Channels, Fei Ren, Yahong Rosa Zheng
Electrical and Computer Engineering Faculty Research & Creative Works
Hardware implementation of discrete-time triply selective Rayleigh fading channel emulators is proposed for multiple-input multiple-output (MIMO) communications. the proposed work differs from existing ones in that it incorporates temporal correlation, intertap correlation, and spatial correlation matrices into multiple uncorrelated frequency-flat fading waveforms to obtain a triply selective fading channel. the flat fading waveforms with temporal correlation or Doppler spectrum are generated using a sum-of-sinusoid method. the intertap correlation matrix associated with multipath delay spread is computed according to the channel power delay profile and transmit/receive filters. the spatial correlation matrices are predefined inputs associated with transmit and receive antenna arrangements. …