Engineering Commons^™

Professional And Organizational Leadership Role In Ethics Management: Avoiding Reliance On Ethical Codification And Nurturing Ethical Culture, Islam H. El-Adaway, Marianne Jennings

Civil, Architectural and Environmental Engineering Faculty Research & Creative Works

The engineering profession has experienced some ethical cases that were rarely reported, scrutinized, or discussed because: they did not necessarily represent violations of existing codes even if they breached ethical principles; those within the organization were not prepared to take steps to address the issues or impose sanction; an/or some of the personnel associated with these cases resorted to silence to avoid being labeled as trouble-makers in their organizations and, perhaps, more broadly, in society. The goal of this paper is to heighten managerial awareness of ethical issues, interrelated ethical lapses, and appropriate responsive actions within professional engineering communities. As …

Assessing The Relationship Between Organizational Management Factors And A Resilient Safety Culture In A Collegiate Aviation Program With Safety Management Systems (Sms), Daniel Kwasi Adjekum, Marcos Fernandez Tous

Aviation Faculty Publications

Extant research advocates for assessing and continuously improving resilient safety culture in high-reliability organizations (HROs) such as aviation that has a fully functional Safety Management Systems (SMS). Perceptions on the relationship between four (4) organizational management factors (Principles, Policy, Procedures, Practices) and resilient safety culture in a collegiate aviation program was assessed using an online survey instrument drafted using Reason (2011) concept on safety resilience. Sample was drawn from aviation students, flight instructors, faculty and administrators. Structural Equation Model (SEM) and Causal Path Analysis (CPA) techniques were used to assess conceptual models. Results suggest good …

Structural Principles Analysis Of Host-Pathogen Protein-Protein Interactions: A Structural Bioinformatics Survey, Huaming Chen, William Guo, Jun Shen, Lei Wang, Jiangning Song

Faculty of Engineering and Information Sciences - Papers: Part B

No abstract provided.

Towards Elucidating The Structural Principles Of Host-Pathogen Protein-Protein Interaction Networks: A Bioinformatics Survey, Huaming Chen, Jiangning Song, Geng Sun, Jun Shen, Lei Wang

Faculty of Engineering and Information Sciences - Papers: Part B

The ultimate goal of systems biology research area is to accurately predict the behavior of biological systems through the construction of computational models, using the related molecular-level data as the input, especially when the structural information of such biological system is available. Combining the three-dimensional (3D) structural information of the cohort of macromolecules underpinning the biological system, the researchers are poised with an unprecedented opportunity to gain a full understanding on how the molecules interact with each other, particularly for an interaction network, e.g. protein-protein interaction networks. Specifically, there are currently a limited number of studies focused on the reconstruction …

Principles And Experimentations Of Self-Organizing Embedded Agents Allowing Learning From Demonstration In Ambient Robotics, Nicolas R. Verstaevel, Christine Regis, Marie-Pierre Gleizes, Fabrice Robert

SMART Infrastructure Facility - Papers

Ambient systems are populated by many heterogeneous devices to provide adequate services to their users. The adaptation of an ambient system to the specific needs of its users is a challenging task. Because human-system interaction has to be as natural as possible, we propose an approach based on Learning from Demonstration (LfD). LfD is an interesting approach to generalize what has been observed during the demonstration to similar situations. However, using LfD in ambient systems needs adaptivity of the learning technique. We present ALEX, a multi-agent system able to dynamically learn and reuse contexts from demonstrations performed by a tutor. …

Principles And Experimentations Of Self-Organizing Embedded Agents Allowing Learning From Demonstration In Ambient Robotic, Nicolas R. Verstaevel, Christine Regis, Marie-Pierre Gleizes, Fabrice Robert

SMART Infrastructure Facility - Papers

Ambient systems are populated by many heterogeneous devices to provide adequate services to its users. The adaptation of an ambient system to the specific needs of its users is a challenging task. Because human-system interaction has to be as natural as possible, we propose an approach based on Learning from Demonstration (LfD). However, using LfD in ambient systems needs adaptivity of the learning technique. We present ALEX, a multi-agent system able to dynamically learn and reuse contexts from demonstrations performed by a tutor. Results of experiments performed on both a real and a virtual robot show interesting properties of our …

Pressure Hydrometallurgy, Fathi Habashi

Fathi Habashi

Pressure Hydrometallurgy is a supplement to the author’s Textbook of Hydrometallugy [second edition 1999]. It is an update to the new processes described in the literature dealing with recovering metals from ores and concentrates using this technology. Great progress was made in this field that necessitated this review.

Reduction Of Superconducting Transition Temperature And Flux Pinning In Al And C Codoped Mgb2 With Insight From First-Principles Calculations, Aihua Li, Xiaolin Wang, S X. Dou, Qiwen Yao, Zhenxiang Cheng, Saeid Soltanian, J M. Yoo, P Munroe

Shi Xue Dou

We report for the first time the Al and C codoping effect on the structures and superconductivity in MgB₂. It was found that both the lattice parameters and the T_c decreased monotonically with increasing doping level of both Al and C. The T_c dropped to 27.5 and 7 K for x=0.2 and for x =0.4, respectively. The reduction of T_c for the codoping was found to be quicker than for individual Al doping and slower than for individual C doping at the same doping levels. First-principles calculations indicated that the observed decrease in T_{c …}

Nitrogen Removal From Natural Gas Using Solid Boron: A First-Principles Computational Study, Qiao Sun, Meng Wang, Zhen Li, Ping Li, Weihua Wang, Xiaojun Tan, Aijun Du

Australian Institute for Innovative Materials - Papers

Selective separation of nitrogen (N2) from methane (CH4) is highly significant in natural gas purification, and it is very challenging to achieve this because of their nearly identical size (the molecular diameters of N2 and CH4 are 3.64 Å and 3.80 Å, respectively). Here we theoretically study the adsorption of N2 and CH4 on B12 cluster and solid boron surfaces a-B12 and c-B28. Our results show that these electron-deficiency boron materials have higher selectivity in adsorbing and capturing N2 than CH4, which provides very useful information for experimentally exploiting boron materials for natural gas purification.

Diagnosing Weakness In Basic Principles Of Electricity In Motor Apprentice Education In Ireland, Peter Kenny

Conference Papers

Many Motor trade apprentice students enter the later years of their studies ill prepared for the level of material encountered. This is due to several factors including the level and knowledge of basic electricity and electrical/electronic principles.

A lot of basic material in these areas has been covered during earlier years of their training but by the time they reach the final year of their apprenticeship (Phase 6) it is not safe to assume that they have a full grasp of the basics required.

We have developed a diagnostic test to measure the level of preparedness of these students. This …

Urban Climate And Challenges Of Tropical Cities, B E. Omogbai

Confluence Journal Environmental Studies (CJES), Kogi State University, Nigeria

This study examines the nature of urban climate, features and the challenges on the developing tropical cities in the 21st century. It argues that the use of principles of urban climate would help in providing comfortable living conditions and problem immune working environments for the inhabitants of tropical cities. The findings reveal that owing to poor environmental planning, inadequate geotechnical landscape surveys prior to the development of urban infrastructures, and non-adherence to the principles of urban climate, challenges of landscape degradation, excessive flooding of the built infrastructures, heat-island effects, and collapse of buildings have emerged. Suggested measures to avert these …

Some Complex Systems Engineering Principles, Matthew J. Berryman, Peter Campbell

SMART Infrastructure Facility - Papers

Complex adaptive systems can be characterised by many adaptively changing parts, with a large number of interactions, and adaptation at the system level. This body of research can inform the large engineering projects that are characterised by large systems of systems, where interactions to achieve end goals matters, and where designs and the technology of parts in service undergo many adaptive changes. A number of key lessons can be drawn from the complex adaptive systems literature. Firstly, that the use of design patterns, as traditionally applied in software engineering, can also be applied to wider systems engineering and systems integration …

First-Principles Study On The Enhancement Of Lithium Storage Capacity In Boron Doped Graphene, Xianlong Wang, Zhi Zeng, Hyojun Ahn, Guoxiu Wang

Faculty of Engineering - Papers (Archive)

The adsorption of Li ions on boron doped graphene was investigated using a first-principles method. Our results show that, as boron doping turns graphene into an electron-deficient system, more Li ions can be captured around boron doped centers than in pristine graphene. One boron atom doped into graphene (6C ring unit) can adsorb six Li ions, which indicates that boron doped graphene is an efficient Li-ion storage material for lithium batteries. Further investigations show that, under limited conditions, boron doped graphene (BC₅) can form Li₆BC₅ compound after Li-ion adsorption, corresponding to a lithium storage capacity …

Reduction Of Superconducting Transition Temperature And Flux Pinning In Al And C Codoped Mgb2 With Insight From First-Principles Calculations, Aihua Li, Xiaolin Wang, S X. Dou, Qiwen Yao, Zhenxiang Cheng, Saeid Soltanian, J M. Yoo, P Munroe

Australian Institute for Innovative Materials - Papers

We report for the first time the Al and C codoping effect on the structures and superconductivity in MgB₂. It was found that both the lattice parameters and the T_c decreased monotonically with increasing doping level of both Al and C. The T_c dropped to 27.5 and 7 K for x=0.2 and for x =0.4, respectively. The reduction of T_c for the codoping was found to be quicker than for individual Al doping and slower than for individual C doping at the same doping levels. First-principles calculations indicated that the observed decrease in T_{c …}

Optical Property And Electronic Band Structure Of A Piezoelectric Compound Ga3po7 Studied By The First-Principles Calculation, Zhenxiang Cheng, Xiaolin Wang

Australian Institute for Innovative Materials - Papers

The structure, electronic and optical properties of a piezoelectric material, Ga₃PO₇ were studied by first-principles calculations in the framework of density functional theory. The calculated structure is in agreement with the experimental data. Band structure reveals that Ga₃PO₇ has a band gap of 3.69 eV. Analysis of partial density of states and Mulliken charge population indicates existence of GaO₅ and PO₄ anion groups in Ga₃PO₇. Furthermore, its optical properties, including dielectric constant, absorption, reflectivity, refractive index, and electron loss were calculated and analysed, which show that Ga_{3 …}

Five-Level Active Npc Converter Topology: She-Pwm Control And Operation Principles, Sridhar Reddy Pulikanti, Vassilios G. Agelidis

Faculty of Engineering and Information Sciences - Papers: Part A

The neutral-point-clamped (NPC) inverter topology has been the centre of research and development effort for numerous applications, including medium- and high-voltage electric motor drives, static compensators (STATCOMs) and other utility type of power electronic systems for almost three decades now. Pulse-width modulation (PWM) control methods have been developed for such topology for respective three-level and multilevel versions. The issue of voltage balancing between the DC bus capacitors is a drawback that requires attention and the problem becomes more serious as the number of levels increases. Selective harmonic elimination PWM can be applied to control the topology as a method to …

Application Of Constructive Alignment Principles To Engineering Education: Have We Really Changed?, Sharon Nightingale, Anna L. Carew, Justin Fung

Faculty of Engineering - Papers (Archive)

A survey of some common engineering subjects in four Australian universities shows that despite much discussion of student centred learning, assessment is still very heavily based on examinations. Analysis of exam questions, and other assessment tasks also shows that in some cases there may be significant mismatch between the stated learning objectives of subjects and the way in which students are assessed. Application of constructive alignment to design of assessment has the potential to ensure that assessment tasks reflect the learning objectives, and may help encourage academics to consider alternatives to examinations.

Distributed Generation Control Using Protection Principles, An D. T Le, Kashem M. Muttaqi, Michael Negnevitsky, Gerard Ledwich

Faculty of Engineering and Information Sciences - Papers: Part A

No abstract provided.

Principles Of Charge And Heat Transport In Thermionic Devices, Roger A. Lewis, Chao Zhang, Ben Lough

Faculty of Engineering - Papers (Archive)

We enunciate the general principles that govern the transport of charge and heat in a thermionic device. We illustrate the application of these principles to the subject of domestic refrigeration. A complementary application is power generation. We distinguish Class 2 devices, in which the potential barrier on the hot side plays a role, from Class 1 devices, in which this barrier is irrelevant. We show that the effect of heat backflow is to drastically reduce the efficiency of thermionic devices in both GaAs and InSb representative semiconductor systems. We conclude that practical devices are not likely with bulk, single-barrier devices.

Fundamental Principles In Paint Technology, James H. Havens

Kentucky Transportation Center Research Report

There are certain fundamental volumetric relationships which should be observed in designing and formulating paints for various uses.