Digital Commons Network^™

Engineering Education Through Problem Based Learning: A Case Study Of Teaching Mechanical Engineering Design In Tu Dublin, Kevin Delaney, Ger Nagle

Articles

Undergraduate students, having learnt to quantify the performance of specific elements of engineering objects, often find it difficult to integrate these elements into quite basic design concepts. Employers expect these engineering graduates to be able to do a great deal more than solve the technical problems taught in engineering school once they enter the workforce. To help students meet this expectation by developing real-world engineering skills as part of their engineering education, the Mechanical Engineering Discipline in Technological University Dublin (TU Dublin) introduced Problem Based Learning (PBL) module for Third Year Mechanical Engineering students in 2005. This module was well …

Experimental Investigation Of Flow Pulsation Waveforms In Rectangular Mesochannels For High Heat Flux Electronics Cooling, Jaakko Mcevoy, Sajad Alimohammadi, Tim Persoons

Articles

The ever rising heat fluxes encountered in electronic devices present a challenging thermal engineering problem. Not only is heat transfer enhancement a goal but more recently control of the enhancement is desired, especially in large scale data facilities where the heated outlet coolant fluid may be of use. Flow pulsation is one of the most common active heat transfer enhancement methods studied across all heat sink sizes. While the effects of pulsation have been shown to increase heat transfer under certain conditions there is still disagreement upon its merit for practical applications, with the majority of previous research has been …

A Generalisable Bottom-Up Methodology For Deriving A Residential Stock Model From Large Empirical Databases, Ciara Ahern, Brian Norton

Articles

Specifying representative reference buildings as a prerequisite for calculating cost-optimal energy performance requirements for buildings and building elements. Appropriate characterisation is prerequisite data for an overall national building energy consumption model to produce valid outcomes. Energy Performance Certificates (EPCs) are issued in the EU, for dwellings whenever they are constructed, sold or leased. Where acquiring data for an EPC would be prohibitively costly, nationally applicable default-values are employed for the building envelope thermal transmittance coefficients. Significant levels of retrofits led to the default-values used now being higher than is typical in reality, leading to characterisations of reference dwellings based on …

Thermal Energy Refurbishment Status Of The Irish Housing Stock, Ciara Ahern, Brian Norton

Articles

Energy Performance Certificates (EPCs) are issued for buildings constructed, sold or leased across the EU. Using a generalizable methodology this work exploits Ireland's EPC national dwelling stock database to determine the thermal refurbishment status of Ireland's housing stock. It is estimated in 2014 that; i) 58% of walls were insulated at a mean overall heat loss coefficient or U-value of 0.66 W/m²K, ii) 67% of roofs were insulated at a mean U-value 0.37 W/m²K, iii) 97% of windows were double-glazed, and iv) 53% of floors were insulated to a mean U-value of 0.59 W/m²K. …

A Hidden Technological Assumption In Patent Law: The Case Of Gene Patents And The Disclosure Requirement, Or Cohen Sasson

Articles

The disclosure requirement in patent law is designed to reveal knowledge regarding a patented invention to allow proper understanding and utilization of that invention. The contention offered here is the presence of an inherent incompatibility between the disclosure requirement and genetic inventions. Genetic inventions are highly contingent on genetic statistical data (GSD), which is gathered during the commercial phase of a genetic invention. GSD are essential for various purposes, which at least some should be satisfied by the disclosure. However, since GSD can be gathered only at the postapplication period, GSD are not disclosed through the disclosure requirement. Therefore, there …

Size Matters: The Impact Of Training Size In Taxonomically-Enriched Word Embeddings, Alfredo Maldonado, Filip Klubicka, John D. Kelleher

Articles

Word embeddings trained on natural corpora (e.g., newspaper collections, Wikipedia or the Web) excel in capturing thematic similarity (“topical relatedness”) on word pairs such as ‘coffee’ and ‘cup’ or ’bus’ and ‘road’. However, they are less successful on pairs showing taxonomic similarity, like ‘cup’ and ‘mug’ (near synonyms) or ‘bus’ and ‘train’ (types of public transport). Moreover, purely taxonomy-based embeddings (e.g. those trained on a random-walk of WordNet’s structure) outperform natural-corpus embeddings in taxonomic similarity but underperform them in thematic similarity. Previous work suggests that performance gains in both types of similarity can be achieved by enriching natural-corpus embeddings with …

Assessing The Quality Of Mobile Graphical User Interfaces Using Multi-Objective Optimization, Soui, Makram, Mabrouka Chouchane, Mohamed Wiem Mkaouer, Marouane Kessentini, Khaled Ghedira

Articles

Aesthetic defects are a violation of quality attributes that are symptoms of bad interface design programming decisions. They lead to deteriorating the perceived usability of mobile user interfaces and negatively impact the Users eXperience (UX) with the mobile app. Most existing studies relied on a subjective evaluation of aesthetic defects depending on end-users feedback, which makes the manual evaluation of mobile user interfaces human-centric, time-consuming, and error-prone. Therefore, recent studies have dedicated their effort to focus on the definition of mathematical formulas that each targets a specific structural quality of the interface. As the UX is tightly dependent on the …

Ecosystem Competition And The Antitrust Laws, Daniel A. Crane

Articles

Conventional antitrust norms analyze market power—as a stepping stone to anticompetitive effects and, hence, prohibited conduct—from the perspective of product substitutability. Two goods or services are said to compete with one another when they are reasonably interchangeable from the perspective of consumers, or to put it in more formal economic terms, when there is cross-elasticity of demand between them. Conversely, when two goods or services are not reasonably interchangeable, they are not horizontally related and are said not to compete with one another. Since a concern over horizontal agreements and horizontal effects dominate antitrust—courts even analyze vertical agreement or merger …

Thermal Refurbishment Status Of The Irish Housing Stock, Ciara Ahern, Brian Norton

Articles

Energy Performance Certificates (EPCs) are issued for buildings constructed, sold or leased across the EU. Using a generalizable methodology this work exploits Ireland’s EPC national dwelling stock database to determine the thermal refurbishment status of Ireland’s housing stock. It is estimated in 2014 that; i) 58% of walls were insulated at a mean overall heat loss coefficient or U-value of 0.66 W/m 2 K, ii) 67% of roofs were insulated at a mean U-value 0.37 W/m 2 K, iii) 97% of windows were double-glazed, and iv) 53% of floors were insulated to a mean U-value of 0.59 W/m 2 K. …

Corrosion Protection Of Monel Alloy Coated With Graphene Quantum Dots Starts With A Surge, Ksv Santhanam, Charles Bopp

Articles

There has been an active interest in protecting metals and alloys using graphene coating. The mechanism by which corrosion protection occurs has not been well understood as the couple involved are both good electron conductors. In this work, we demonstrate that Monel alloy coated with graphene quantum dots (GQD) changes the corrosion rate with a surge (increase) caused by the galvanic coupling of the two materials. This surge results in the protective layer formation on Monel to inhibit the corrosion. X-ray fluorescence spectrum of Monel (400) alloy showed the composition of it as Ni (67.05%) and Cu (29.42%). The Tafel …

Accelerated Capital Allowances: An Overview, Bernard Doherty, James Mc Mahon, William Coffey, Ger Nagle, Kevin Delaney

Articles

ACA is based on the existing capital allowances tax structure or wear and tear allowance, for plants and machinery. Claiming the ACA is carried out the same way as for the standard capital allowances.

Organisations who invest in eligible energy-efficient capital equipment can deduct the full cost of the equipment from their profits in the year of purchase. This reduces the taxable profit in year one by the full cost of the equipment.

International Collaborations: Inspiring Active Learning In Higher Education, Caroline Ferguson, Robert Hickey, Shaun Ferns, Robert Savelle

Articles

International collaborations can present various challenges; however, with strong leadership and support, as well as through leveraging a variety of online collaborative tools, the results can be great. In this paper, we discuss the process involved in the design, development, and utilization of an openly available active learning handbook that was created by colleagues at three institutions: one in Dublin, Ireland and two in Oshawa, Canada. We discuss the journey that inspired this collaborative project and address some of the unique issues around post-conference collaborations. To conclude, we highlight some applications of the handbook across our institutions and beyond.

Operationalizing Learning From Rare Events: Framework For Middle Humanitarian Operations Managers, Amr Mahfouz, Ashraf Labib, Sara Hadleigh-Dunn, Marco Gentile

Articles

The purpose of this paper is to investigate the learning from rare events and the knowledge management processinvolved, which presents a significant challenge to many organizations. This is primarily attributed to the inability tointerpret these events in a systematic and “rich” manner, which this paper seeks to address. We start by summarizing therelevant literature on humanitarian operations management (HOM), outlining the evolution of the socio-technical disasterlifecycle and its relationship with humanitarian operations, using a supply chain resilience theoretical lens. We then out-line theories of organizational learning (and unlearning) from disasters and the impact on humanitarian operations. Subse-quently, we theorize the …

A Techno-Economic Analysis Of Current Cooling Techniques In Irish Data Centres, Lee Gibbons, Bryan Coyne, David Kennedy, Sajad Alimohammadi

Articles

This research is part of a comprehensive study to determine reformative actions for cooling regimes within the Irish data centre market. To achieve this goal, preliminary Exergy, Entropy change and operational cost analyses are used. It is determined that there is no clear advantage for using one cooling method over another without knowing the data centres secondary function (e.g. district heating, energy generation). Air cooling technology is a good candidate for a highly reliable system due to the low exhaust temperatures of 30°C. Two-phase immersion is a possibility for economically viable data centres where operational costs are to be minimised, …

Optimizing The Valorization Of Industrial By-Products For The Induction Healing Of Asphalt Mixtures, Amir Tabakovic, Marta Vila-Cortavitarte, Daniel Jato-Espino, Daniel Castro-Fresno

Articles

Self-healing within asphalt pavements is the process whereby road cracks can be repaired automatically when thermal and mechanical conditions are met. To accelerate and improve this healing process, metal particles are added to asphalt mixtures. However, thisapproach is costly both in economic and environmental terms due to the use of virgin metallic particles. So, even though the self-healing of asphalt mixtures has been widely addressed in experimental terms over the years, there is a lack of research aimed at modelling this phenomenon, especially with the purpose of optimizing the use of metal particles through the valorization of industrial by-products. As …

Imaginary Bottles, Jessica Litman

Articles

This essay, written for a symposium commemorating John Perry Barlow, who died on February 7, 2018, revisits Barlow's 1994 essay for WIRED magazine, "The Economy of Ideas: A Framework for patents and copyrights in the Digital Age (everything you know about intellectual property is wrong)." Barlow observed that networked digital technology posed massive and fundamental challenges for the markets for what Barlow termed “the work we do with our minds” and for the intellectual property laws designed to shape those markets. He predicted that those challenges would melt extant intellectual property systems into a smoking heap within a decade, and …

Towards Efficient, Work-Conserving, And Fair Bandwidth Guarantee In Cloud Datacenters, Baraa Saeed Ali, Kang Chen, Imran Khan

Articles

Bandwidth guarantee is a critical feature to enable performance predictability in cloud datacenters. This process is expected to achieve three requirements: work conservation, fairness, and simplicity. However, the distributed nature of datacenters raises significant challenges to attaining those requirements at the same time. In this paper, we propose an efficient approach that can satisfy the three requirements simultaneously. Our scheme takes advantage of multipath TCP (MPTCP) to generate explicit bandwidth guarantee (BG) traffic and work conservation (WC) traffic.We further prioritize the BG traffic over the WC traffic in the network fabric. Due to the priority setting, WC cannot harm bandwidth …

On A Diagonal Conjecturefor Classical Ramsey Numbers, Meilian Liang, Stanislaw Radziszowski, Xiaodong Xu

Articles

Let R(k1, · · · , kr) denote the classical r-color Ramsey number for integers ki ≥ 2. The Diagonal Conjecture (DC) for classical Ramsey numbers poses that if k1, · · · , kr are integers no smaller than 3 and kr−1 ≤ kr, then R(k1, · · · , kr−2, kr−1 − 1, kr + 1) ≤ R(k1, · · · , kr). We obtain some implications of this conjecture, present evidence for its validity, and discuss related problems. Let Rr(k) stand for the r-color Ramsey number R(k, · · · , k). It is known that limr→∞ …

An“Astonishingly Excellent” Solution To Super-Fake Narratives, Cathren Page

Articles

Persuasion studies indicate that facts and logic have likely never persuaded people. Rather, people typically hold “deep frame” beliefs, and story persuades them. People then use facts and logic to justify their beliefs.

While this potentially persuasive “fake news” itself is old, the widespread dissemination of fake news via bots is new. Donald Trump’s campaign benefitted from these bots and from an electoral college map more favorable to Republicans. But these super-powers were not his only strengths, the Trump campaign wielded the power of superhero storytelling techniques.

So, faced with an army of bots, a superhero story, and an unfavorably …

Framework To Estimate Total Particulate Mass And Nicotine Delivered To E-Cig Users From Natural Environment Monitoring Data, Edward Hensel, Nathan Eddingsaas, A. Gary Difrancesco, Shehan Jayasekera, Sean O'Dea, Risa Robinson

Articles

A framework describing the joint effect of user topography behavior and product characteristics of one exemplar device on the total particulate mass (TPM) and aerosol constituent yield delivered to a user is presented and validated against seven user-specific ‘playback’ emissions observations. A pen-style e-cig was used to collect emissions across puff flow rates and durations spanning the range observed in the natural environment. Emissions were analyzed with GC-MS and used to construct empirical correlations for TPM concentration and nicotine mass ratio. TPM concentration was demonstrated to depend upon both puff flow rate and duration, while nicotine mass ratio was not …

Exploring Alternative Approaches To Entrepreneurial Exporting: Internationalization Through An Effectual Lens, Norah R. Cussen, Thomas M. Cooney

Articles

In 2017 EU exports supported 36 million jobs in the EU. Furthermore, it was estimated that on average each billion euro of extra-EU exports supported more than 13,000 jobs in the EU Exporting is widely viewed as one of the key drivers of economic growth and many traditional approaches have been applied to engender greater levels of exporting by indigenous enterprises. However, Sarasvathy [(2001). Causation and effectuation: Toward a theoretical shift from economic inevitability to entrepreneurial contingency. Academy of Management Review, 26, 243–263, (2013). An effectual approach to international entrepreneurship: Overlaps, challenges and provocative possibilities. The Journal of Entrepreneurship Theory …

An Agent-Based Model Of Financial Benchmark Manipulation, Gabriel Virgil Rauterberg, Megan Shearer, Michael Wellman

Articles

Financial benchmarks estimate market values or reference rates used in a wide variety of contexts, but are often calculated from data generated by parties who have incentives to manipulate these benchmarks. Since the the London Interbank Offered Rate (LIBOR) scandal in 2011, market participants, scholars, and regulators have scrutinized financial benchmarks and the ability of traders to manipulate them. We study the impact on market quality and microstructure of manipulating transaction-based benchmarks in a simulated market environment. Our market consists of a single benchmark manipulator with external holdings dependent on the benchmark, and numerous background traders unaffected by the benchmark. …

Janus's Two Faces, Kate Andrias

Articles

In ancient Roman religion and myth, Janus is the god of beginnings, transitions, and endings. He is often depicted as having two faces, one looking to the future and one to the past. The Supreme Court’s Janus v AFSCME case of last Term is fittingly named.1 Stunning in its disregard of principles of stare decisis, Janus overruled the forty-yearold precedent Abood v Detroit Board of Education. 2 The Janus decision marks the end of the post–New Deal compromise with respect to public sector unions and the FirstAmendment.Looking to the future, Janus lays the groundwork for further attack on labor rights—as …

Cwa In-Lieu Fee Mitigation: Project And Programmatic Risks, Erin Okuno, Rebecca Kihslinger, Royal C. Gardner, Christina Libre

Articles

No abstract provided.

Bodies In Dependence: A Foucauldian Genealogy Of The Americans With Disabilities Acts, Michael E. Skyer

Articles

The Americans with Disabilities Acts (ADA) of 1990 and 2008 are laws imagined as enacting two goals: enhancing civil rights and reducing sociopolitical discrimination for Americans with disabilities; however, findings from this study strongly contrast with popular assumptions about the ADA. Key findings show how the ADA legitimizes governmental control of disability through discourse to consolidate economic power. The study employs the genealogical method, derived from Foucault, which is used to identify destructive and productive operations of power and identify ambiguities in discursive regimes. The ADA constructs a discursive category of "disability," the results of which are contradictory and problematic, …

Blazing Trails Through An Untamed Wilderness: Improving Your Library's Self-Guided Help, Ruth D. Terry, D'Arcy Hutchings, Jennifer Mckay, Anna Bjartmarsdottir, Daria O. Carle

Articles

Libraries provide self-guided help on their websites through FAQs, guides, and tutorials. This content, often created to meet immediate needs and located on multiple webpages, can become an untamed wilderness over time. A group of librarians at the University of Alaska Anchorage took a holistic approach to reflect on, re-envision, and renew our library’s online self-guided help in order to provide students with a more navigable path to research success. This group includes an instructional design librarian and four subject specialist librarians who have responsibility for a significant amount of library instruction, LibGuides, and other tutorials. When we realized the …

Can Refactoring Be Self-Affirmed? An Exploratory Study On How Developers Document Their Refactoring Activities In Commit Messages, Eman Abdullah Alomar, Mohamed Wiem Mkaouer, Ali Ouni

Articles

Refactoring is a critical task in software maintenance and is usually performed to enforce best design practices, or to cope with design defects. Previous studies heavily rely on defining a set of keywords to identify refactoring commits from a list of general commits extracted from a small set of software
systems. All approaches thus far consider all commits without checking whether refactorings had actually happened or not. In this paper, we aim at exploring how developers document their refactoring activities during the software life cycle. We call such activity Self-Affirmed Refactoring, which is an indication of
the developer-related refactoring events …

An Analysis Of Altitude, Citizen Science And A Convolutional Neural Network Feedback Loop On Object Detection In Unmanned Aerial Systems, Connor Bowley, Marshall Mattingly, Andrew Barnas, Susan Ellis-Felege, Travis Desell

Articles

Using automated processes to detect wildlife in uncontrolled outdoor imagery in the field of wildlife ecology is a challenging task. In imagery provided by Unmanned Aerial Systems (UAS), this is especially true where individuals are small and visually similar to background substrates. To address these challenges, this work presents an automated feedback loop which can operate on large scale imagery, such as UAS generated orthomosaics, to train convo- lutional neural networks (CNNs) with extremely unbalanced class sizes. This feedback loop was used to help train CNNs using imagery classified by both expert biologists and citizen scientists at the Wildlife@home project. …

On The Impact Of Refactoring On The Relationship Between Quality Attributes And Design Metrics, Mohamed Wiem Mkaouer, Eman Abdullah Alomar, Ali Ouni, Marouane Kessentini

Articles

Refactoring is a critical task in software maintenance and is generally performed to enforce the best design and implementation practices or to cope with design defects. Several studies attempted to detect refactoring activities through mining software repositories allowing to collect, analyze and get actionable data-driven insights about refactoring practices within software projects. Aim: We aim at identifying, among the various quality models presented in the literature, the ones that are more in-line with the developer’s vision of quality optimization, when they explicitly mention that they are refactoring to improve them. Method: We extract a large corpus of design-related refactoring activities …

Neglecting Nationalism, Gil Seinfeld

Articles

Federalism is a system of government that calls for the division of power between a central authority and member states. It is designed to secure benefits that flow from centralization and from devolution, as well as benefits that accrue from a simultaneous commitment to both. A student of modern American federalism, however, might have a very different impression, for significant swaths of the case law and scholarly commentary on the subject neglect the centralizing, nationalist side of the federal balance. This claim may come as a surprise, since it is obviously the case that our national government has become immensely …