Digital Commons Network^™

Asymptotic Residual Stress Distribution Induced By Multipass Welding Processes, P Ferro, F Berto, Nm James

School of Engineering, Computing and Mathematics

In the high cycle fatigue (HCF) regime, the fatigue strength of welded joints is influenced by residual stresses (RS) induced during welding processes. If the weld toe is modelled via a sharp V-notch, the distribution of weld toe residual stress can be shown to be asymptotic with a singularity which follows either the linear-elastic or elastic-plastic solution depending on parameters that range across material properties, specimen clamping conditions, and the welding process. For thicker plates, multipass welding is used instead of single-pass welding to reduce the heat input and hence the width of the fusion zone (FZ) and heat-affected zone …

Mixed-Initiative Approaches To On-Device Mobile Game Design, Mj Nelson, S Colton, Ej Powley, Se Gaudl, P Ivey, R Saunders, Bp Ferrer, M Cook

School of Engineering, Computing and Mathematics

Playing casual games is a wildly popular activity on smartphones. However, designing casual games is done by a smaller group of people, usually on desktop computers, using professional development tools. Our goal is to bring these activities closer together, in terms of who does them and how they do them. Our Gamika Technology platform is a 2D physics-based mobile game design environment. It comprises a 284-dimensional parametric design space, and poses mobile game design as the problem of navigating this space. We have built three mobile apps thus far to experiment with on-device, mixed-initiative navigation of the Gamika design space …

Nonverbal Immediacy As A Characterisation Of Social Behaviour For Human–Robot Interaction, J Kennedy, P Baxter, T Belpaeme

School of Engineering, Computing and Mathematics

An increasing amount of research has started to explore the impact of robot social behaviour on the outcome of a goal for a human interaction partner, such as cognitive learning gains. However, it remains unclear from what principles the social behaviour for such robots should be derived. Human models are often used, but in this paper an alternative approach is proposed. First, the concept of nonverbal immediacy from the communication literature is introduced, with a focus on how it can provide a characterisation of social behaviour, and the subsequent outcomes of such behaviour. A literature review is conducted to explore …

Trust Integration For Security Optimisation In P2p-Based M2m Applications, Besfort Shala, Patrick Wacht, Ulrich Trick, Armin Lehmann, Bogdan Ghita, Stavros Shiaeles

School of Engineering, Computing and Mathematics

This publication presents a novel concept for securing P2P-based M2M applications using the integration of a trust management system. In addition, this publication presents different security problems inside the P2P-based M2M application (P2P4M2M) framework and evaluates P2P protocols based on security. Furthermore, this publication emphasises the importance of trust for ensuring security. This is done through a novel concept which uses special trust metric parameters for the P2P4M2M framework.

Wavelet-Based Variability Of Yellow River Discharge At 500-, 100-, And 50-Year Timescales, Lu Su, Chiyuan Miao, Alistair G.L. Borthwick, Qingyun Duan

School of Engineering, Computing and Mathematics

No abstract provided.

Review Of “Energy Dissipation In Hydraulic Structures” By H. Chanson, A Borthwick

School of Engineering, Computing and Mathematics

No abstract provided.

Longitudinal Research: A Panel Discussion On Conceptual Issues, Research Design, And Statistical Techniques, Mo Wang, Daniel J. Beal, David Chan, Daniel A. Newman, Jeffrey B. Vancouver, Robert J. Vandenberg

Research Collection School of Social Sciences

The goal of this article is to clarify the conceptual, methodological, and practical issues that frequently emerge when conducting longitudinal research, as well as in the journal review process. Using a panel discussion format, the current authors address 13 questions associated with 3 aspects of longitudinal research: conceptual issues, research design, and statistical techniques. These questions are intentionally framed at a general level so that the authors could address them from their diverse perspectives. The authors’ perspectives and recommendations provide a useful guide for conducting and reviewing longitudinal studies in work, aging, and retirement research.

Are All Interferences Bad? Bilingual Advantages In Working Memory Are Modulated By Varying Demands For Controlled Processing, Hwajin Yang, Sujin Yang

Research Collection School of Social Sciences

We investigated bilingual advantages in general control abilities using three complex-span tasks of working memory (WM). An operation-span task served as a baseline measure of WM capacity. Additionally, two modified versions of the Stroop-span task were designed to place varying attentional-control demands during memoranda encoding by asking participants either to read the to-be-remembered item aloud (lower cognitive control; i.e., Stroop-span task) or to name the font color of the to-be-remembered item while still encoding the word for later recall (greater cognitive control; i.e., attention-impeded Stroop-span task). Twenty-six Korean-English bilinguals and 25 English-native monolinguals were tested. We found that bilinguals outperformed …

Practical Intelligence, Emotional Intelligence, And Social Intelligence, Filip Lievens, David Chan

Research Collection School of Social Sciences

Over the years, practical intelligence, social intelligence, and especially emotional intelligence have received substantial attention in both the academic and practitioner literatures. However, at the same time, these individual dierence “constructs” have also fueled controversies and criticisms, including their applications to employee selection. It is without doubt that their definition, dimensionality, and operationalization (measurement) have been much more questioned as compared to the more traditional or established constructs (i.e., cognitive ability, personality) in this section of the Handbook.

Solar Energy R & D Project: Teachers Incorporating Stem- Modules To Yield An Energy Literate Generation, Tricia Kirkland, Lindsay Snowden

ENgaging Educators in Renewable enerGY (ENERGY): Lesson Plans & Slideshows (2017-2019)

Background- Photovoltaic (PV) cells produce the largest amount of electricity when they are directly facing the sun. Solar panels that use tracking systems to position the panel to constantly face the sun have the greatest efficiency. But, these systems are expensive.

Aim- Design a dual axis tracking solar panel with microcontroller and sensors (light, humidity, temperature, and compass) that are both cost effective and efficient. Sensors will be used to determine performance depending on environmental factors.

Ethics Statement: Researchers will keep honest, clear, and accurate records when collecting all data in lab and communication of information learned.

Wind Energy, Bob Deckard, Jaimee Howard

ENgaging Educators in Renewable enerGY (ENERGY): Lesson Plans & Slideshows (2017-2019)

No abstract provided.

Using An Online Learning Tutorial To Teach Rea Data Modelling In Accounting Information Systems Courses, Poh Sun Seow, Gary Pan

Research Collection School Of Accountancy

Online learning has been gaining widespread adoption due to its success in enhancing student-learning outcomes and improving student academic performance. This paper describes an online tutorial to teach resource-event-agent (REA) data modeling in an undergraduate accounting information systems course. The REA online tutorial reflects a self-study application designed to help students improve their understanding of the REA data model. As such, the tutorial acts as a supplement to lectures by reinforcing the concepts and incorporating practices to assess student understanding. Instructors can access the REA online tutorial at http://smu.sg/rea. An independent survey by the University's Centre for Teaching Excellence found …

Workplace Faculty Friendships And Work-Family Culture, Megumi Watanabe, Christina Falci

Department of Sociology: Faculty Publications

Although various work-family policies are available to faculty members, many underuse these policies due to concerns about negative career consequences. Therefore, we believe it is important to develop an academic work culture that is more supportive of work-family needs. Using network data gathered from faculty members at a Midwestern university, this study investigated the relationship between friendship connections with colleagues and perceived work-family supportiveness in the department. It also explored the role of parental status in the relationship for men and women. Results show that faculty with larger friendship networks have more positive perceptions of work-family culture compared to faculty …

Toward Supervised Reinforcement Learning With Partial States For Social Hri, E Senft, S Lemaignan, P Baxter, T Belpaeme

School of Engineering, Computing and Mathematics

Social interacting is a complex task for which machine learning holds particular promise. However, as no sufficiently accurate simulator of human interactions exists today, the learning of social interaction strategies has to happen online in the real world. Actions executed by the robot impact on humans, and as such have to be carefully selected, making it impossible to rely on random exploration. Additionally, no clear reward function exists for social interactions. This implies that traditional approaches used for Reinforcement Learning cannot be directly applied for learning how to interact with the social world. As such we argue that robots will …

Applied Gaussian Process In Optimizing Unburned Carbon Content In Fly Ash For Boiler Combustion, C Wang, Y Liu, Rm Everson, Aam Rahat, S Zheng

School of Engineering, Computing and Mathematics

Recently, Gaussian Process (GP) has attracted generous attention from industry. This article focuses on the application of coal fired boiler combustion and uses GP to design a strategy for reducing Unburned Carbon Content in Fly Ash (UCC-FA) which is the most important indicator of boiler combustion efficiency. With getting rid of the complicated physical mechanisms, building a data-driven model as GP is an effective way for the proposed issue. Firstly, GP is used to model the relationship between the UCC-FA and boiler combustion operation parameters. The hyperparameters of GP model are optimized via Genetic Algorithm (GA). Then, served as the …

Armstrong State University 2017 Fact Book, Armstrong State University

Armstrong Office of Institutional Research: Armstrong Fact Books (Archived)

No abstract provided.

The Crime Lab In The Age Of The Genetic Panopticon, Brandon L. Garrett

Faculty Scholarship

"Scientific evidence really nails this man to the wall," the Harris County, Texas prosecutor told the jurors in closing statements. At trial, George Rodriguez claimed he was innocent and that he had been working a factory the day of the crime. The prosecutor emphasized, however, that the blood type of swabs taken from the victim showed that Rodriguez did commit the crime and that a hair from the crime scene matched him. But seventeen years later, the same hair was tested again, this time using DNA analysis, and the evidence cleared Rodriguez and ultimately led to the crime crime lab …

Is ‘Small’ Always Small And ‘Big’ Always Big? Re-Reading Educational Developments In Small (And Micro) States, Tavis D. Jules, Patrick Ressler

Education: School of Education Faculty Publications and Other Works

This volume is concerned with a topic that has only relatively recently started to attract the attention it deserves: educational developments in small states. The volume is guided by the question (i) if and how small states deal with certain policy challenges to their education systems that research has identified as particularly important for their future development, and (ii) whether there is something like typical ‘small state behavior’ in educational matters. The volume seeks to contribute to a genuinely comparative approach to education in small states. Moreover, widening conventional definitions of smallness, it aims to advance research in the field …

The Impact Of Culture, Leadership, And Power, On Staff Motivation In The Context Of International Organizations, Erdem Erciyes

Plymouth Business School Theses

This thesis investigates the impact of culture, leadership, and power, on staff motivation in selected international organizations (IOs), and develops a theoretical framework to assist with the practice of workforce motivation. The main research question is: “How can supervisors motivate their staff in the context of IOs?” Utilizing critical theory as a paradigm of inquiry, the study’s philosophical perspective leans heavily on “phenomenology”. Conducting this research led to the realization that there are a few studies in the existing literature on this subject matter. After investigating grand theories, the meso theories which form the theoretical background of the research were …

2017 Nyar (Savannah) Program, National-Youth-Risk (Savannah) Conference

National Youth Advocacy & Resilience Conference

N/A

The Impact Of The Boston Marathon Bombing On Public Willingness To Cooperate With Police, Gary Lafree, Amy Adamczyk

Publications and Research

While a key to law enforcement success is the willingness of the public to cooperate with police, we have limited understanding of how terrorist attacks affect this public readiness. Prior research suggests that terrorist attacks might increase citizen cooperation with police through both prevention efforts and rally effects. We test these assertions with three nationally representative surveys on respondents’ willingness to help police combat terrorism: one before the Boston Marathon bombings and two after. As predicted, public willingness to report suspicious behavior to police increases significantly following the bombings and there is evidence that these increases generalize to ordinary crime. …

Income Taxation And Asset Valuation (Ii) The Value Of Preferential Taxation, Theodore S. Sims

Faculty Scholarship

The predecessor to this Article explored the properties of an income tax that uses economic depreciation in measuring capital income. This Article investigates some fundamental properties of an income tax that does not. The predecessor illuminated the equivalence between economic depreciation and accrual taxation, and highlighted the insight, due to Paul Samuelson, that either produces asset values that are independent of their holders' marginal rates, even in a system with graduated rates (and even if those rates vary over time). The current Article explores in qualitative terms the value of "preferential" departures from valuation-neutral taxation.

Nano-Magnetic Resonance Imaging (Nano-Mri) Gives Personalized Medicine A New Perspective, Lorenzo Rosa, Jonathan Blackledge, Albert Boretti

Articles

This paper reviews some of the major and most recent advances in nanoscale-magnetic resonance imaging (nano-MRI) for personalized medicine (PM). Nano-MRI may drastically expand the capabilities of the traditional magnetic resonance images (MRI), down to the nanometer scale and possibly, in the near future, at the atomic scale. Nano-MRI is potentially able to observe structures which cannot be seen using today’s molecular imaging, with sensitivities of many billions of times better than MRI as currently used in hospitals, for example. The paper briefly reports on the foremost research themes in nano-MRI.

Information Hiding With Data Diffusion Using Convolutional Encoding For Super-Encryption, Jonathan Blackledge, Paul Tobin, J. Myeza, C.M. Adolfo

Articles

The unification of data encryption with information hiding methods continues to receive significant attention because of the importance of protecting encrypted information by making it covert. This is because one of the principal limitations in any cryptographic system is that encrypted data flags the potential importance of the data (i.e. the plaintext information that has been encrypted) possibly leading to the launch of an attack which may or may not be successful. Information hiding overcomes this limitation by making the data (which may be the plaintext or the encrypted plaintext) imperceptible, the security of the hidden information being compromised if …

Characterization Of The Sub-Micrometer Hierarchy Levels In The Twist-Bend Nematic Phase With Nanometric Helices Via Photopolymerization: Explanation For The Sign Reversal In The Polar Response, Vitaly Panov, Sithara Sreenilayam, Yuri Panarin, Jagdish Vij, Chris Welch, Georg Mehl

Articles

Photopolymerization of a reactive mesogen mixed with a mesogenic dimer, shown to exhibit the twist-bend nematic phase (NTB), reveals the complex structure of the self-deformation patterns observed in planar cells. The polymerized reactive mesogen retains the structure formed by liquid crystalline molecules in the twist bend phase, thus enabling its observation by scanning electron microscopy (SEM). Hierarchical ordering scales ranging from tens of nanometers to micrometers are imaged in detail. Submicron features, anticipated from earlier X-ray experiments, are visualized directly. In the self-deformation stripes formed in the NTB phase, the average director field is found tilted in …

An Analysis Of Harmonic Heating In Smart Buildings And Distribution Network Implications With Increasing Non-Linear (Domestic) Load And Embedded Generation, Chittesh Veni Chandran, Keith Sunderland, Malabika Basu

Articles

Harmonic distortion is generally not taken into account within domestic installations and the associated wiring systems, as its potential is considered sufficiently small to be neglected. Standards to limit harmonic manifestations in the low voltage (LV) network are available, but these can be breached as a consequence of advancements in power electronics in some modern household devices contributing higher levels of harmonic distortion than permitted. While these devices individually might not be considered serious in terms of system level harmonic distortion manifestations, electrical equipment failures and insulation failures - increasingly being derived from harmonic cable heating - suggest a different …

Magnetic Field Sensing Using Whispering Gallery Modes In A Cylindrical Microresonator Infilitrated With Ferronematic Liquid Crystal, Aseel Mahmood, Vishnu Kavungal, Sudad S. Ahmed, Peter Kopcansky, Vlasta Zavisova, Gerald Farrell, Yuliya Semenova

Articles

An all-fiber magnetic field sensor based on whispering-gallery modes (WGM) in a fiber micro-resonator infiltrated with ferronematic liquid crystal is proposed and experimentally demonstrated. The cylindrical microresonator is formed by a 1 cm-long section of a photonic crystal fiber infiltrated with ferronematic materials. Both ferronematics suspensions are prepared based on the nematic liquid crystal 1-(trans-4-Hexylcyclohexyl)-4-isothiocyanatobenzene (6CHBT) doped with rod-like magnetic particles in the first case and with spherical magnetic particles in the second case. WGMs are excited in the fiber microresonator by evanescent light coupling using a tapered fiber with a micron-size diameter. The Q-factor of the microresonator determined from …

The Role Of The Dendritic Growth Models Dimensionality In Predicting The Columnar To Equiaxed Transition (Cet), M. Seredynski, Marek Rebow, J. Banaszek

Articles

The dendrite tip kinetics model accuracy relies on the reliability of the stability constant used, which is usually experimentally determined for 3D situations and applied to 2D models. The paper reports authors` attempts to cure the situation by deriving 2D dendritic tip scaling parameter for aluminium-based alloy: Al-4wt%Cu. The obtained parameter is then incorporated into the KGT dendritic growth model in order to compare it with the original 3D KGT counterpart and to derive two-dimensional and three-dimensional versions of the modified Hunt’s analytical model for the columnar-to-equiaxed transition (CET). The conclusions drawn from the above analysis are further confirmed through …

Adaptive Linear Prediction For Optimal Control Of Wind Turbines, Mahinsasa Narayana, Keith Sunderland, Ghanim Putrus, Michael Conlon

Articles

In order to obtain maximum power output of a Wind Energy Conversion System (WECS), the rotor speed needs to be optimised for a particular wind speed. However, due to inherent inertia, the rotor of a WECS cannot react instantaneously according to wind speed variations. As a consequence, the performance of the system and consequently the wind energy conversion capability of the rotor are negatively affected. This study considers the use of a time series Adaptive Linear Prediction (ALP) technique as a means to improve the performance and conversion efficiency of wind turbines. The ALP technique is introduced as a real …

Compact Humidity Sensor Based On A Multi-Layer Agarose Hydrogel Coated Silica Microsphere Resonator, Arun Mallik, Yuliya Semenova, Vishnu Kavungal, Dejun Liu

Conference Papers

In this paper we report on a novel approach to implementing a compact humidity sensor that utilizes whispering gallery mode (WGM) phenomena in a silica microsphere coated with Agarose hydrogel. The spectral positions of the WGM resonances for such a sensor depend strongly on the refractive index and thickness of the coating. The WGM’s spectral shift occurs due to adsorption/desorption of the water vapor in response to changes in ambient humidity and also due to the corresponding changes of the coating thickness. We experimentally investigated the WGMs spectral shift for a 100 μm diameter silica microsphere coated with Agarose hydrogel …