Digital Commons Network^™

Continuous Time-Varying Biasing Approach For Spectrally Tunable Infrared Detectors, Woo-Yong Jang, Majeed M. Hayat, Payman Zarkesh-Ha, Sanjay Krishna

Electrical and Computer Engineering Faculty Research and Publications

In a recently demonstrated algorithmic spectral-tuning technique by Jang et al. [Opt. Express 19, 19454-19472, (2011)], the reconstruction of an object’s emissivity at an arbitrarily specified spectral window of interest in the long-wave infrared region was achieved. The technique relied upon forming a weighted superposition of a series of photocurrents from a quantum dots-in-a-well (DWELL) photodetector operated at discrete static biases that were applied serially. Here, the technique is generalized such that a continuously varying biasing voltage is employed over an extended acquisition time, in place using a series of fixed biases over each sub-acquisition time, which totally …

New Perspective On Passively Quenched Single Photon Avalanche Diodes: Effect Of Feedback On Impact Ionization, David A. Ramirez, Majeed M. Hayat, Graham J. Rees, Xudong Jiang, Mark A. Itzler

Electrical and Computer Engineering Faculty Research and Publications

Single-photon avalanche diodes (SPADs) are primary devices in photon counting systems used in quantum cryptography, time resolved spectroscopy and photon counting optical communication. SPADs convert each photo-generated electron hole pair to a measurable current via an avalanche of impact ionizations. In this paper, a stochastically self-regulating avalanche model for passively quenched SPADs is presented. The model predicts, in qualitative agreement with experiments, three important phenomena that traditional models are unable to predict. These are: (1) an oscillatory behavior of the persistent avalanche current; (2) an exponential (memoryless) decay of the probability density function of the stochastic quenching time of the …

Posters, Programs, And Perspectives On Democracy, Chad M. Kahl, Janet Paterson

Faculty and Staff Publications – Milner Library

Kahl and Paterson provide an example of collaboration around a specific, one-time program that both units were interested in bringing to their university, in this case an art installation on the theme of democracy. Although the authors spearheaded the program, they tapped the expertise of colleagues in their units and across campus in order to accomplish their goals. Kahl and Paterson's work also serves as an example of combining active programming, in this case three lectures by campus faculty, with passive programming, an approach where professionals create exhibits or educational displays in a centrally located venue for students and others …

A New Ensemble Learning Method For Temporal Pattern Identification, Wenjing Zhang, Xin Feng

Electrical and Computer Engineering Faculty Research and Publications

In this paper we present a method for identification of temporal patterns predictive of significant events in a dynamic data system. A new hybrid model using Reconstructed Phase Space (MRPS) and Hidden Markov Model (HMM) is applied to identify temporal patterns. This method constructs phase space embedding by using individual embedding of each variable sequences. We also employ Hidden Markov Models (HMM) to the multivariate sequence data to categorize multi-dimensional data into three states, e.g. normal, patterns and events. A support vector machine optimization method is used to search an optimal classifier to identify temporal patterns that are predictive of …

A Very Robust Algan/Gan Hemt Technology To High Forward Gate Bias And Current, Bradley D. Christiansen, Eric R. Heller, Ronald A. Coutu Jr., Ramakrishna Vetury, Jeffrey B. Shealy

Electrical and Computer Engineering Faculty Research and Publications

Reports to date of GaN HEMTs subjected to forward gate bias stress include varied extents of degradation. We report an extremely robust GaN HEMT technology that survived—contrary to conventional wisdom—high forward gate bias (+6 V) and current (>1.8 A/mm) for >17.5 hours exhibiting only a slight change in gate diode characteristic, little decrease in maximum drain current, with only a 0.1 V positive threshold voltage shift, and, remarkably, a persisting breakdown voltage exceeding 200 V.

Planning For Shoreline Retreat In Matunuck: The Relevance Of Coastal Geologic Processes And Climate Change, Shannon Hulst

Open Access Master's Theses

Property owners and town officials in South Kingstown, Rhode Island are seeking means to protect private property and a local road from coastal erosion. Matunuck Beach Road is the only means of egress for nearly five-hundred homes in the village of Matunuck, and there is a public water main running underneath. There are millions of dollars worth of private structures that are also in danger from erosion. The political factors at play in this case are the desire to preserve private investments, the interest in keeping thriving businesses open, the protection of infrastructure, and the maintenance of community character. In …

Prosecutors And Peremptories, Alafair S. Burke

Hofstra Law Faculty Scholarship

A quarter of a century after the Court’s decision in Batson v. Kentucky, overwhelming evidence demonstrates that lawyers continue to exercise peremptory challenges in racialized ways. In light of Batson’s failure to alter a stubborn pattern of using peremptory challenges in racialized ways, scholars have repeatedly called for the abolishment of peremptory challenges, changes to the Batson framework, modifications to the rules of professional responsibility, and increased disciplinary enforcement and sanctions against those who discriminate during jury selection. The focus of much of the current Batson scholarship assumes that lawyers will inevitably consider race during jury selection and that the …

The Community Prosecutor: Questions Of Professional Discretion, Bruce A. Green, Alafair Burke

Hofstra Law Faculty Scholarship

This Article examines community prosecuting from an ethics perspective. Our focus is not on prosecutors’ compliance with the disciplinary rules, however. The strategies that have been said to exemplify community prosecuting are almost invariably compliant with disciplinary rules and other aspects of the law governing prosecutors. Rather, we take a broader perspective. Our focus is on how prosecutors exercise discretion in the context of adopting community prosecution strategies. We examine this question from both normative and procedural perspectives. We propose that the addition of community-based defense lawyers could help mitigate concerns about prosecutorial discretion in community justice programs by broadening …

Exemption Portability May Be A Remedy For Decoupling Problem, Mitchell M. Gans, Jonathan G. Blattmachr

Hofstra Law Faculty Scholarship

With the increase of the federal estate tax exemption and the phase out of the state death credit (which most states took as their estate tax) effected by provisions of the Economic Growth and Tax Relief Reconciliation Act of 2001 ("2001 Tax Act"), the death tax systems of several states became "decoupled" from the federal estate tax system. That has caused problems for many married persons residing in or owning property in these decoupled states. Under current federal legislation, these problems are scheduled to end at the beginning of next year because all of the estate tax changes made by …

Toward A Nexus Of Virtue, Ronald J. Colombo

Hofstra Law Faculty Scholarship

Corporate law, like all law, should be directed toward the common good. The common good requires that corporate activity be restrained, if not actively directed, by human virtue. An analysis of the corporate enterprise suggests that those corporate actors with the greatest stake in the exercise of virtue, and best positioned to influence corporate activity via the exercise of virtuous judgment, are the corporation's officers. Thus, one of the primary objectives of corporate law should be to promote virtue among corporate officers.

Contrary to what some might assume, the promotion of virtue among corporate officers need not entail a promulgation …

The Oil Pollution Act's Provisions On Damages For Economic Loss, David W. Robertson

MC Law Review

No abstract provided.

United States House Elections Post-Citizens United: The Influence Of Unbridled Spending, Laura L. Gaffey

Honors Projects

After the Citizens United decision in 2010 allowed corporations and unions to spend freely in elections, much media attention was given to the influence of unlimited and undisclosed donations during the 2010 midterm elections. This research attempts to determine the impact of increased outside spending by super PACs and other groups post-Citizens United by comparing United States House races in 2006 and 2010. The analysis controls for other factors that influence election outcomes in order to determine the influence of outside spending, confirming that outside money did have a small measurable effect in both elections when spent to support challengers. …

Ma In Public Relations: Foundation In Community Based Research, Catherine Bates, Edward Brennan

Posters

The Foundations in Community Based Research module, the first of its kind in Ireland, allows MA students to work in small groups, each with a community partner, to design, plan, carry out and report on a piece of primary research which the community partner requires, with a focus on public relations research.

A Simulation Analysis Of Photovoltaic Ac Module Integrated Converters In Parallel, Under Controlled Edge Shading Conditions, Lynette O'Callaghan, Mick Mckeever, Brian Norton

Conference Papers

A DC and AC power simulation comparison of: a Photovoltaic (PV) array with a modular, parallel, AC converter configuration; and a series, string configuration with a central AC converter, is presented. The systems are simulated using a comprehensive range of edge shading scenarios and irradiance conditions. Power control and transformation circuitry must be designed for shade and module mismatch tolerance to prevent over-proportional power to shade losses, as average losses from Building Integrated PV (BIPV) systems are approximately 20 to 25%, due to shade, mismatch, differences in orientation and inclination, and temperature effects. 59.4% of the simulations showed gains in …

Portable Bridge Wim Data Collection Strategy For Secondary Roads, Bernard Enright, Cathal Leahy, Eugene J. Obrien, Jennifer Keenahan

Conference papers

A common method of collecting traffic loading data across a large road network is to use a network of permanent pavement-based WIM systems. An alternative is to use one or more portable Bridge Weigh-In-Motion systems which are moved periodically between bridges on the network. To make optimum use of such a system, a suitable data collection strategy is needed to choose locations for the system. This paper describes a number of possible strategies which the authors have investigated for the National Roads Authority in Ireland. The different strategies are examined and their advantages and disadvantages compared. Their effectiveness at detecting …

Occupational Noise Exposure Of Nightclub Bar Employees In Ireland, Gary Henehan, Aoife Kelly, Sara Boyd, Gordon Chambers

Articles

Due to the transposition of the EU Directive 2003/10/EC into Irish Law, the entertainment sector was obligated to comply with the requirements of the Safety, Health and Welfare at Work (General Application) Regulations 2007, Chapter 1 Part 5: Control of Noise at Work since February 2008. Compliance with the Noise Regulations was examined in 9 nightclubs in Ireland. The typical daily noise exposure of 19 bar employees was measured using 2 logging dosimeters and a Type 1 fixed position sound level meter. Physical site inspections identified nightclub noise control measures. Interviews and questionnaires were used to assess the managers and …

Enhanced Refractometer Based On Periodically Tapered Small Core Singlemode Fiber, Pengfei Wang, Gilberto Brambilla, Ming Ding, Timothy Lee, Lin Bo, Yuliya Semenova, Qiang Wu, Gerald Farrell

Articles

Abstract—An all-fiber 1 refractive index (RI) sensor with a 2 simple configuration of periodical tapers is proposed and inves3 tigated experimentally. The proposed fiber RI sensor consists of 4 a small core fiber sandwiched between two standard singlemode 5 fibers, with tapers periodically fabricated along the small core 6 fiber using a focused CO2 laser beam. Such a structure can be 7 used for RI sensing by measuring the dip wavelength shift of 8 the multimode interference within the small core fiber cladding. 9 An average sensitivity of 226.6 nm/RIU (RI Unit) has been 10 experimentally achieved in the RI …

A Note On Horner's Method, Tian-Xiao He, P. J.-S. Shiue

Scholarship

Here we present an application of Horner's method in evaluating the sequence of Stirling numbers of the second kind. Based on the method, we also give an e_cient way to calculate the diference sequence and divided diference sequence of a polynomial, which can be applied in the Newton interpolation. Finally, we survey all of the results in Proposition 1.4.

Eulerian Polynomials And B-Splines, Tian-Xiao He

Scholarship

Here presented is the interrelationship between Eulerian polynomials, Eulerian fractions and Euler-Frobenius polynomials, Euler-Frobenius fractions, B-splines, respectively. The properties of Eulerian polynomials and Eulerian fractions and their applications in B-spline interpolation and evaluation of Riemann-zeta function values at odd integers are given. The relation between Eulerian numbers and B-spline values at knot points are also discussed.

Using Quest3d To Develop Ves: A Tool For Enhancing Electrical Safety And Design In The Built Environment, Martin Barrett, Jonathan Blackledge

Conference papers

This paper presents a novel desktop virtual reality model titled Virtual Electrical Services (VES), developed to enhance electrical safety and design in the built environment. The model developed using Quest3D has the potential to be used as an industry design tool or as an educational tool for third level students and represents a significant watershed in how electrical services engineers can potentially design buildings and interpret their design decisions. A description of the software development process of the virtual reality model is presented along with the applications that were developed within the model. Based on the early implementation of this …

Distributed Formal Concept Analysis Algorithms Based On An Iterative Mapreduce Framework, Ruairí De Fréin, Biao Xu, Eric Robson, Mícheál Ó Fóghlú

Conference papers

While many existing formal concept analysis algorithms are efficient, they are typically unsuitable for distributed implementation. Taking the MapReduce (MR) framework as our inspiration we introduce a distributed approach for performing formal concept mining. Our method has its novelty in that we use a light-weight MapReduce runtime called Twister which is better suited to iterative algorithms than recent distributed approaches. First, we describe the theoretical foundations underpinning our distributed formal concept analysis approach. Second, we provide a representative exemplar of how a classic centralized algorithm can be implemented in a distributed fashion using our methodology: we modify Ganter’s classic algorithm …

Learning Lessons From The Past: Legal Issues Arising From Ireland's Child Abuse Reports, Ursula Kilkelly

Irish Journal of Applied Social Studies

Inquiries have played an important role in telling the stories of children abused and neglected in Ireland in situations of family abuse, clerical abuse and institutional abuse. The inquiries – associated with the name of the chairperson (Ryan) or by their geographical remit (Dublin, Ferns, Cloyne, Kilkenny and Roscommon) – serve to vindicate the rights of the children affected and to identify the failure of the authorities to protect children from harm. They also make numerous recommendations as to how children’s treatment can be improved. Although each inquiry had varying terms of reference, scope and status, together they address a …

Gendered Processes In Child Protection: 'Mother-Blaming' And The Erosion Of Men's Accountability, Majella Mulkeen

Irish Journal of Applied Social Studies

The Inquiry Report of the Roscommon Child Care Case (HSE, 2010) was the first Inquiry Report into intra-familial child abuse and neglect in the Irish context to explicitly identify a gender dimension to its findings. This paper seeks to build on these observations and argues that an analysis of the gendering processes that underlie understandings of and responses to neglect, violence and abuse can make child protection policy and practice more effective. The absence of an analysis which places gender at the core of policy and practice in child protection and family support raises serious questions about the differentiated responses …

Book Review: Child Sexual Abuse And The Catholic Church: Gender, Power And Organizational Culture, Rosaleen Mcelvaney

Irish Journal of Applied Social Studies

No abstract provided.

The Edition Freshers' Guide, 2012, Dit News Society

Student Publications

No abstract provided.

Trust In The Information Society, Brian O'Neill

Articles

Trust is an important feature for all users of the Internet who rely on the safety and security of network technologies and systems for their daily lives. Trust, or the lack of it, has also been identified by the European Commission’s Digital Agenda as a major barrier to further development of the information society in Europe. One of the areas in which concerns have been raised is in relation to children’s safety online. As a result, substantial efforts have been made by policymakers and by the industry to build greater trust and confidence in online digital safety. This paper examines …

Striving For World Class Excellence: Rankings And Emerging Societies, Ellen Hazelkorn

Books/Book chapters

No abstract provided.

Wells For Zoe, Malawi And Dit Students From Various Disciplines, Catherine Bates

Posters

Since 2008 DIT students across disciplines have collaborated with Irish-Malawian charity Wells for Zoe. Students have spent up to three months in Malawi undertaking community-based projects on work placement modules, addressing the challenges facing local communities. In addition, DIT-based projects include pump design development and digital marketing projects.

Smarter Travel Survey., Dublin Institute Of Technology, David O'Connor

Posters

Poster displaying details of Smarter travel survey. Dublin City Council is seeking to have Drimnagh designated as a Smarter Travel town. Smarter Travel towns are areas where latest practices and investments in sustainable travel are piloted and reviewed. One of the initiatives being explored is a Personalised Travel Plan (PTP), whereby local people are encouraged to improve their travel behaviour via direct marketing. As part of UniverCities (part of the Creative Dublin Alliance) and Students Learning with Communities (SLWC) initiatives, DIT School of Spatial Planning agreed to carry out a survey of the local community to gauge interest in and …

The Class Of 2012

The Park Place Economist

No abstract provided.