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Articles 1861 - 1890 of 2926
Full-Text Articles in Entire DC Network
Mechanistic Studies Of In Vitro Cytotoxicity Of Poly(Amidoamine) Dendrimers In Mammalian Cells, Sourav Prasanna Mukherjee, Fiona Lyng, Amaya Garcia, Maria Davoren, Hugh Byrne
Mechanistic Studies Of In Vitro Cytotoxicity Of Poly(Amidoamine) Dendrimers In Mammalian Cells, Sourav Prasanna Mukherjee, Fiona Lyng, Amaya Garcia, Maria Davoren, Hugh Byrne
Articles
Poly(amidoamine) (PAMAM) dendrimer nanoparticles have been demonstrated to elicit a well defined cytotoxicological response from mammalian cell lines, the response increasing systematically with dendrimer generation and number of surface amino groups. In this work, using generation G4, G5, and G6 dendrimers, this systematic response is furthermore demonstrated for the generation of reactive oxygen species, lysosomal activity, and the onset of apoptosis and levels of DNA damage. The results are consistent with a pathway of localisation of PAMAM dendrimers in the mitochondria leading to ROS production causing oxidative stress, apoptosis and DNA damage. ROS production is co-located in the mitochondria, and …
Influence Of Hybrid Organic–Inorganic Sol–Gel Matrices On The Photophysics Of Amino-Functionalized Uv-Sensitizers, Mohamed Oubaha, R. Copperwhite, Catherine Boothman, A. Ovsianikov, R. Kiyan, V. Purlys, M. O'Sullivan, Colette Mcdonagh, B. Chichkov, R. Gadonas, B.D. Maccraith
Influence Of Hybrid Organic–Inorganic Sol–Gel Matrices On The Photophysics Of Amino-Functionalized Uv-Sensitizers, Mohamed Oubaha, R. Copperwhite, Catherine Boothman, A. Ovsianikov, R. Kiyan, V. Purlys, M. O'Sullivan, Colette Mcdonagh, B. Chichkov, R. Gadonas, B.D. Maccraith
Articles
Recent interest in photolithographic processes employing single and two-photon absorption processes have afforded advanced opportunities to fabricate both planar and three-dimensional microstructures. The fabrication of such structures is dependent on the local polymerization of the organic moieties using photoinitiating molecules, and a key parameter to consider is the dependency of the photoreactivity of these initiators on the matrices in which they are dispersed. To our knowledge, there has been no comprehensive investigation reported on the photoreactivity dependency of commercially available photoinitiators inserted within hybrid sol–gel materials. The aim of this paper is to highlight and explain the influence of the …
Inverse Scattering Transform For The Degasperis–Procesi Equation, Adrian Constantin, Rossen Ivanov, Jonatan Lenells
Inverse Scattering Transform For The Degasperis–Procesi Equation, Adrian Constantin, Rossen Ivanov, Jonatan Lenells
Articles
We develop the Inverse Scattering Transform (IST) method for the Degasperis- Procesi equation. The spectral problem is an sl(3) Zakharov-Shabat problem with constant boundary conditions and finite reduction group. The basic aspects of the IST such as the construction of fundamental analytic solutions, the formulation of a Riemann-Hilbert problem, and the implementation of the dressing method are presented.
A Monocular Marker-Free Gait Measurement System, Jane Courtney, Annraoi M. De Paor
A Monocular Marker-Free Gait Measurement System, Jane Courtney, Annraoi M. De Paor
Articles
This paper presents a new, user-friendly, portable motion capture and gait analysis system for capturing and analyzing human gait, designed as a telemedicine tool to monitor remotely the progress of patients through treatment. The system requires minimal user input and simple single-camera filming (which can be acquired from a basic webcam) making it very accessible to nontechnical, nonclinical personnel. This system can allow gait studies to acquire a much larger data set and allow trained gait analysts to focus their skills on the interpretation phase of gait analysis. The design uses a novel motion capture method derived from spatiotemporal segmentation …
Welfare As Happiness, Jonathan Masur, John Bronsteen, Christopher Buccafusco
Welfare As Happiness, Jonathan Masur, John Bronsteen, Christopher Buccafusco
Articles
No abstract provided.
A Suggested Building Block Geometry Without Continuous Radial Joints Of Possible Relevance For Particle Detectors, Jim Mcgovern
A Suggested Building Block Geometry Without Continuous Radial Joints Of Possible Relevance For Particle Detectors, Jim Mcgovern
Articles
A geometry for concentrc shells or tubes, built-up from a single rhombohedral block type, is described. Continuous radial joints are avoided.
False Dichotomies, Facts And Values, And The Snares Of Objectivism: Planning For Leisure From An Experiential Perspective?, Ross Neville
False Dichotomies, Facts And Values, And The Snares Of Objectivism: Planning For Leisure From An Experiential Perspective?, Ross Neville
Articles
Despite the fact that the experiential perspective has had a profound impact on the way we view leisure behaviour, experiential matters have been renounced for being overtly subjective. As a corollary, experiential matters have been castigated for their inability to offer concrete criteria for leisure policy and the provisions of services. This paper argues that this dismissal of experiential matters is based on an overinflated dichotomy – the fact/value dichotomy – and that, by valorising objectivist approaches to managing leisure resources, experiential matters have become nothing more than a policy-making faux pas. The paper argues that while experiential matters bring …
Validated Real-Time Energy Models For Small-Scale Grid-Connected Pv-Systems, Lacour Ayompe, Aidan Duffy, Sarah Mccormack, Michael Conlon
Validated Real-Time Energy Models For Small-Scale Grid-Connected Pv-Systems, Lacour Ayompe, Aidan Duffy, Sarah Mccormack, Michael Conlon
Articles
This paper presents validated real-time energy models for small-scale grid-connected PV-systems suitable for domestic application. The models were used to predict real-time AC power output from a PV system in Dublin, Ireland using 30-min intervals of measured performance data between April 2009 and March 2010. Statistical analysis of the predicted results and measured data highlight possible sources of errors and the limitations and/or adequacy of existing models, to describe the temperature and efficiency of PV-cells and consequently, the accuracy of power prediction models. PV-system AC output power predictions using empirical models for PV-cell temperature and efficiency prediction showed lower percentage …
Rethinking Trust Law Reform: How Prudent Is Modern Prudent Investor Doctrine?, Stewart E. Sterk
Rethinking Trust Law Reform: How Prudent Is Modern Prudent Investor Doctrine?, Stewart E. Sterk
Articles
During the 1990s, modern portfolio theory provided the theoretical foundation for significant reforms in trust investment doctrine-reforms that freed trustees from a legal regime in which they faced potential liability for making "speculative" investments. The reforms enabled trustees to pursue investment policies that protected beneficiaries against inflation risk. But the reforms worked too well; they encouraged trustees to invest a higher percentage of trust assets in equities just in time for a decade that has seen two precipitous stock market declines. Although no sensible investment strategy would have avoided losses during these periods of market turmoil, the doctrinal reforms endorsed …
Activity Recognition Using Temporal Evidence Theory, Susan Mckeever, Juan Ye, Lorcan Coyle, Simon Dobson, Chris Bleakley
Activity Recognition Using Temporal Evidence Theory, Susan Mckeever, Juan Ye, Lorcan Coyle, Simon Dobson, Chris Bleakley
Articles
The ability to identify the behavior of people in a home is at the core of Smart Home functionality. Such environments are equipped with sensors that unobtrusively capture information about the occupants. Reasoning mechanisms transform the technical, frequently noisy data of sensors into meaningful interpretations of occupant activities. Time is a natural human way to reason about activities. Peoples‟ activities in the home often have an identifiable routine; activities take place at distinct times throughout the day and last for predicable lengths of time. However, the inclusion of temporal information is still limited in the domain of activity recognition. Evidence …
Rapid Multi-Class Multi-Residue Method For The Confirmation Of Chloramphenicol And Eleven Nitroimidazoles In Milk And Honey By Liquid Chromatography Tandem Mass Spectrometry, Mark Cronly, Patrice Behan, Barry Foley, Liam Regan, Sheila Martin, Michael Doyle, Edward Malone
Rapid Multi-Class Multi-Residue Method For The Confirmation Of Chloramphenicol And Eleven Nitroimidazoles In Milk And Honey By Liquid Chromatography Tandem Mass Spectrometry, Mark Cronly, Patrice Behan, Barry Foley, Liam Regan, Sheila Martin, Michael Doyle, Edward Malone
Articles
A confirmatory method has been developed to allow for the analysis of eleven nitroimidazoles and also chloramphenicol in milk and honey samples. These compounds are classified as A6 compounds in annex IV of council regulation 2377/90 and therefore prohibited for the use in animal husbandry. Milk samples are extracted by acetonitrile with addition of NaCl, while honey samples are first dissolved in water before a similar extraction. Honey extracts undergo a hexane wash to remove impurities. Both milk and honey extracts are evaporated to dryness and reconstituted in initial mobile phase. These are then injected onto an LC-MS/MS system and …
A Systematic Study Of The Effect Of Silver On The Chelation Of Formic Acid To A Titanium Precursor And The Resulting Effect On The Anatase To Rutile Transformation Of Tio2, Nicholas Nolan, Michael Seery, Steve Hinder, Linda Healy, Suresh Pillai
A Systematic Study Of The Effect Of Silver On The Chelation Of Formic Acid To A Titanium Precursor And The Resulting Effect On The Anatase To Rutile Transformation Of Tio2, Nicholas Nolan, Michael Seery, Steve Hinder, Linda Healy, Suresh Pillai
Articles
Anatase to rutile transition in an unmodified synthetic titania usually occurs at a temperature range of 600 – 700 °C. Various methods such as addition of metallic and non-metallic dopants and modifying the precursor have previously been reported to influence the anatase to rutile transition temperature. In the current study, the effect of addition of increasing amounts of silver to the extent of chelation of a formate group to a titanium precursor and the resulting effects on the transformation of anatase to rutile has been studied. The addition of silver (0, 1, 3 and 5 mol %) on the anatase …
Computer Simulation Of A Biomass Gasification-Solid Oxide Fuel Cell Power System Using Aspen Plus, Wayne Doherty, Anthony Reynolds, David Kennedy
Computer Simulation Of A Biomass Gasification-Solid Oxide Fuel Cell Power System Using Aspen Plus, Wayne Doherty, Anthony Reynolds, David Kennedy
Articles
The operation and performance of a solid oxide fuel cell (SOFC) stack on biomass syn-gas from a biomass gasification combined heat and power (CHP) plant is investigated. The objective of this work is to develop a model of a biomass-SOFC system capable of predicting performance under diverse operating conditions. The tubular SOFC technology is selected. The SOFC stack model, equilibrium type based on Gibbs free energy minimisation, is developed using Aspen Plus. The model performs heat and mass balances and considers ohmic, activation and concentration losses for the voltage calculation. The model is validated against data available in the literature …
The Inevitability Of Theory, Richard O. Lempert
The Inevitability Of Theory, Richard O. Lempert
Articles
I wrote this Article in response to an invitation to deliver the keynote address at Berkeley Law School’s Jurisprudence and Social Policy conference Building Theory Through Empirical Legal Studies. Lauren Edelman, the intellectual mother of the conference, gently brushed aside my suggestion that I present one of my own attempts to synthesize the results of empirical research to generate theory, and asked that I directly address the conference topic. I am glad that she did.
Development Of A 12 Kva Dsp-Controlled Laboratory Prototype Upqc, Iurie Axente, Jayanti Navilgone Ganesh, Malabika Basu, Michael Conlon, Kevin Gaughan
Development Of A 12 Kva Dsp-Controlled Laboratory Prototype Upqc, Iurie Axente, Jayanti Navilgone Ganesh, Malabika Basu, Michael Conlon, Kevin Gaughan
Articles
This paper reports the development of a laboratory prototype of a fully digital DSP-controlled 12-kVA unified power quality conditioner (UPQC), capable of compensating for both the supply voltage and the load current imperfections. A fully digital controller based on the TMS320F2812 DSP platform is implemented for the reference generation as well as control purposes. The delay problem in the digital controller is overcome by application of a fast DSP, a compact control technique and proper flow of control steps in the DSP software. A phase-locked loopless software grid synchronization method has been implemented for the effective operation of the UPQC …
Highly Visible Light Active Tio2-Xnx Heterojunction Photocatalysts, Vinodkumar Etacheri, Michael Seery, Steven Hinder, Suresh Pillai
Highly Visible Light Active Tio2-Xnx Heterojunction Photocatalysts, Vinodkumar Etacheri, Michael Seery, Steven Hinder, Suresh Pillai
Articles
Nitrogen doped anatase-rutile heterojunctions are successfully synthesized through an ethylene-diaminetetraacetic acid (EDTA) modified sol-gel process.An FT-IR study of EDTA modified TiO2 gel confirms the existence of an ionic intermediate (as indicated by a Δν value of 233 cm-1).Differential scanning calorimetry (DSC), X-ray diffraction (XRD), and Raman spectroscopy are employed to study the phase evolution, phase purity, and crystallite size of samples. Formations of O-Ti-N and N-Ti-N bonds in calcined samples are confirmed using XPS and FT-IR spectro- scopy. AllEDTAmodified samples show significantly higher visible light photocatalytic activity than the unmodified sample. The most active nitrogen doped heterojunction obtained at 400C …
Input-Output Analysis Of Irish Construction Sector Greenhouse Gas Emissions, Adolf Acquaye, Aidan Duffy
Input-Output Analysis Of Irish Construction Sector Greenhouse Gas Emissions, Adolf Acquaye, Aidan Duffy
Articles
Ireland is committed to limiting its greenhouse gas (GHG) emissions to 113% of 1990 levels over the period 2008-12 and to 84% of 2005 levels by 2020 under the Kyoto Agreement and the EU’s ’20 20’ by 2020 respectively. National policies have targeted many industry sectors but have failed to directly tackle GHG emissions associated with construction activity. This paper estimates energy and GHG emissions intensities of the Irish construction sector and subsectors and estimates its contribution to Irish national emissions. This information is used to identify and assess the impacts of policy measures which would result in a reduction …
A Raman Spectroscopy Study Of The Solubilisation Of Swcnts By Polycyclic Aromatic Hydrocarbons, Sourabhi Debnath, Qiaohuan Cheng, Theresa Hedderman, Hugh Byrne
A Raman Spectroscopy Study Of The Solubilisation Of Swcnts By Polycyclic Aromatic Hydrocarbons, Sourabhi Debnath, Qiaohuan Cheng, Theresa Hedderman, Hugh Byrne
Articles
The effectiveness of polycyclic aromatic hydrocarbons (PAHs) for selective solubilisation of single walled carbon nanotubes (SWCNTs) has been studied by Raman spectroscopy. Polyphenyl and polyacene PAHs of different lengths are used. Selective interaction between the PAHs and SWCNT is investigated by analyzing the Raman radial breathing modes the frequency positioning of which yields information concerning the diameter distribution of the SWCNT sample. Samples were dispersed at concentrations below the debundling limit and deposited on quartz substrates. A combination of four laser excitation energies was utilized to establish the distribution of diameters present. The results show that the PAHs interact with …
A Linear Finite Element Acoustic Fluid-Structure Model Of Ultrasonic Angioplasty In Vivo, Mark Wylie, Garrett Mcguinness, Graham Gavin
A Linear Finite Element Acoustic Fluid-Structure Model Of Ultrasonic Angioplasty In Vivo, Mark Wylie, Garrett Mcguinness, Graham Gavin
Articles
The delivery of high-power ultrasonic energy via small diameter wire waveguides represents a new alternative therapy for the treatment of chronic totally occluded arteries (CTOs). This type of energy manifests itself as a mechanical vibration at the distal-tip of the waveguide with amplitudes of vibration up to 60 µm and at frequencies of 20- 50 kHz. Disruption of diseased tissue is reported to be a result of direct mechanical ablation, cavitation, pressure components and acoustic streaming and that ablation was only evident above the cavitation threshold. This work presents a linear finite element acoustic fluid-structure model of an ultrasonic angioplasty …
Dual-Action Hygienic Coatings: Benefits Of Hydrophobicity And Silver Ion Release And Surface Analysis, Niall Stobie, Brendan Duffy, John Colreavy, Patrick Mchale, Steven Hinder, Declan Mccormack
Dual-Action Hygienic Coatings: Benefits Of Hydrophobicity And Silver Ion Release And Surface Analysis, Niall Stobie, Brendan Duffy, John Colreavy, Patrick Mchale, Steven Hinder, Declan Mccormack
Articles
Coatings that demonstrate reduced attachment of crystalline precipitates and the medical device colonising Staphylococcus epidermidis were prepared by the immobilisation of silver doped perfluoropolyether–urethane siloxane thin films on glass substrates. The presence of stratified hydrophobic perfluoropolyether groups protects the coating surface from the attachment of crystalline hydrophilic species such as chlorides and phosphates, whilst silver ion release inhibited attachment of S. epidermidis and subsequent biofilm formation in vitro. The release of silver ions protects the perfluoro groups from the hydrophobic interactions of S. epidermidis cells, which can reduce the hydrophobicity of the protective coating. These coatings also exhibited significant antibacterial …
Predicting Neointimal Hyperplasia In Stented Arteries Using Time-Dependant Computational Fluid Dynamics: A Review, Jonathan Murphy, Fergal Boyle
Predicting Neointimal Hyperplasia In Stented Arteries Using Time-Dependant Computational Fluid Dynamics: A Review, Jonathan Murphy, Fergal Boyle
Articles
This paper reviews the recent literature regarding the time-dependant computational fluid dynamics (CFD) analyses of blood flow through implanted coronary stents. The in vivo processes which result in arterial restenosis are identified. The definition and range of the computationally predicted variables which are believed to stimulate the restenosis processes are evaluated. The reviewed literature is subdivided into effect-based in which the effects of altering the flow model are investigated and design-based in which different geometric stent configurations are compared. Finally, conclusions are made regarding the body of work reviewed and recommendations are provided for future work in this field.
Assessment Of Acceptance Sampling Plans Using Posterior Distribution For A Dependent Process, A. Erhan Mergen, Z. Seyda Deligonul
Assessment Of Acceptance Sampling Plans Using Posterior Distribution For A Dependent Process, A. Erhan Mergen, Z. Seyda Deligonul
Articles
In this study, performance of single acceptance sampling plans by attribute is investigated by using the distribution of fraction nonconformance (i.e., lot quality distribution (LQD)) for a dependent production process. It is the aim of this study to demonstrate that, in order to emphasize consumer risk (i.e., the risk of accepting a bad lot), it is better to evaluate a sampling plan based upon its performance as assessed by the posterior distribution of fractions nonconforming in accepted lots. Similarly, it is the desired posterior distribution that sets the basis for designing a sampling plan. The prior distribution used in this …
The Discourses Of Higher Education In Ireland: Religion, Nationalism And Economic Development, Nora French
The Discourses Of Higher Education In Ireland: Religion, Nationalism And Economic Development, Nora French
Articles
Higher education is shaped and changed by the context in which it operates. For the past several decades, it has been shaped in Ireland by plans for economic development and the focus has been on education as an enabler of wealth creation. It is claimed to have been an important factor in the rise of the Celtic Tiger economy, and the government are again looking to education as a main contributor to recovery from the current recession. This focus marked a major change in Irish higher education. It was in sharp opposition to the deep-seated tradition of liberal education based …
Seeing Is Believing: Body Motion Dominates In Multisensory Conversations, Cathy Ennis, Rachel Mcdonnell, Carol O'Sullivan
Seeing Is Believing: Body Motion Dominates In Multisensory Conversations, Cathy Ennis, Rachel Mcdonnell, Carol O'Sullivan
Articles
In many scenes with human characters, interacting groups are an important factor for maintaining a sense of realism. However, little is known about what makes these characters appear realistic. In this paper, we investigate human sensitivity to audio mismatches (i.e., when individuals’ voices are not matched to their gestures) and visual desynchronization (i.e., when the body motions of the individuals in a group are mis-aligned in time) in virtual human conversers. Using motion capture data from a range of both polite conversations and arguments, we conduct a series of perceptual experiments and determine some factors that contribute to the plausibility …
Complex Absorbing Potential Method For Systems, Jimmy Kungsman
Complex Absorbing Potential Method For Systems, Jimmy Kungsman
Articles
The Complex Absorbing Potential (CAP) method is widely used to compute resonances in Quantum Chemistry, both for scalar valued and matrix valued Hamiltonians. In the semiclassical limit ℏ→0 we consider resonances near the real axis and we establish the CAP method rigorously in an abstract matrix valued setting by proving that resonances are perturbed eigenvalues of the nonselfadjoint CAP Hamiltonian, and vice versa. The proof is based on pseudodifferential operator theory and microlocal analysis.
Trends In The Mathematical Competency Of University Entrants In Ireland By Leaving Certificate Mathematics Grade, Fiona Faulkner, Ailish Hannigan, Olivia Gill
Trends In The Mathematical Competency Of University Entrants In Ireland By Leaving Certificate Mathematics Grade, Fiona Faulkner, Ailish Hannigan, Olivia Gill
Articles
This article reports on the mathematical competency of students entering third-level education in the University of Limerick (UL). Data from diagnostic testing, gathered on 5,949 students between the years 1998 and 2008, are used to demonstrate the changes in competency levels of students entering UL. There has been a significant decline in the performance of students in the diagnostic test over time.The performance, on average, of students with the same leaving certificate mathematics grade on entry into university has not changed significantly over time. However, the profile of the entrants has changed considerably and this is contributing to the overall …
Conservation-Reliant Species And The Future Of Conservation, Dale Goble
Conservation-Reliant Species And The Future Of Conservation, Dale Goble
Articles
Species threatened with extinction are the focus of mounting conservation concerns throughout the world. Thirty-seven years after passage of the U.S. Endangered Species Act in 1973, we conclude that the Act’s underlying assumption—that once the recovery goals for a species are met it will no longer require continuing management—is false. Even when management actions succeed in achieving biological recovery goals, maintenance of viable populations of many species will require continuing, species-specific intervention. Such species are “conservation reliant.” To assess the scope of this problem, we reviewed all recovery plans for species listed as endangered or threatened under the Act. Our …
A Model For Predicting Extragalactic Jet Lifetimes, Daniel S. Spicer, Robert Bingham, Stephen O'Sullivan
A Model For Predicting Extragalactic Jet Lifetimes, Daniel S. Spicer, Robert Bingham, Stephen O'Sullivan
Articles
Abstract. In this letter, we propose a model to explain the disintegration of ex- tragalactic jets and to predict the associated timescale. The model assumes that a jet is current and charge neutral as well as collimated at its source; however, the forward electron current gradually decays producing a magnetic field transverse to the direction of jet propagation. This growing transverse magnetic field eventually causes the jet to disintegrate.
No Witch Is A Bad Witch: A Commentary On The Erasure Of Matilda Joslyn Gage, Zanita E. Fenton
No Witch Is A Bad Witch: A Commentary On The Erasure Of Matilda Joslyn Gage, Zanita E. Fenton
Articles
No abstract provided.
Structure-Reactivity Relationships Of L-Proline Derived Spirolactams And A-Methyl Prolinamide Organocatalysts In The Asymmetric Michael Addition Reaction Of Aldehydes To Nitroolefins., Fintan Kelleher, Sinead Kelly, John Watts, Vickie Mckee
Structure-Reactivity Relationships Of L-Proline Derived Spirolactams And A-Methyl Prolinamide Organocatalysts In The Asymmetric Michael Addition Reaction Of Aldehydes To Nitroolefins., Fintan Kelleher, Sinead Kelly, John Watts, Vickie Mckee
Articles
L-Proline derived spirolactams and a-methyl prolinamides act as organocatalysts for the asymmetric conjugate addition of aldehydes to nitroolefins in excellent yields, with good diastereoselectivity and enantioselectivity. Furthermore, low catalyst loadings (5 mol%) and a low aldehyde molar excess (1.5 molar equivalents) were achieved.