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Multi-Period Liner Ship Fleet Planning With Dependent Uncertain Container Shipment Demand, Qiang Meng, Tingsong Wang, Shuaian Wang 2015 University of Wollongong

Multi-Period Liner Ship Fleet Planning With Dependent Uncertain Container Shipment Demand, Qiang Meng, Tingsong Wang, Shuaian Wang

Faculty of Engineering and Information Sciences - Papers

This paper deals with a realistic multi-period liner ship fleet planning problem by incorporating stochastic dependency of the random and period-dependent container shipment demand. This problem is formulated as a multi-period stochastic programming model with a sequence of interrelated two-stage stochastic programming (2SSP) problems characterized ship fleet planning in each single period. A solution method integrating dual decomposition and Lagrangian relaxation method is designed for solving the developed model. Numerical experiments are carried out to assess applicability and performance of the proposed model and solution algorithm. The results further demonstrate importance of stochastic dependence of the uncertain container shipment demand.


A Study Of The Behaviour Of Fresh And Coal Fouled Ballast Reinforced By Geogrid Using The Discrete Element Method, Ngoc Trung Ngo, Buddhima Indraratna, Cholachat Rujikiatkamjorn 2015 University of Wollongong

A Study Of The Behaviour Of Fresh And Coal Fouled Ballast Reinforced By Geogrid Using The Discrete Element Method, Ngoc Trung Ngo, Buddhima Indraratna, Cholachat Rujikiatkamjorn

Faculty of Engineering and Information Sciences - Papers

Geogrids are widely used in ballasted rail tracks for reinforcement and stabilisation. During train operation, ballast becomes contaminated or fouled due to infiltration of fines from the surface, mud pumping from the subgrade, and degradation, which decreases the performance of the geogrids. This paper presents the results of a laboratory and numerical simulation to study the effect that coal fines have on the interface between ballast and geogrid. The stress-strain behaviour of fresh and fouled ballast reinforced by geogrid was investigated via a series of large scale direct shear tests in the laboratory and numerical simulations using the Discrete Element ...


Micro Sheet Hydroforming Process Of Ultra-Thin Pure Titanium Foil, Hideki Sato, Kenichi Manabe, Dongbin Wei, Zhengyi Jiang, Daiki Kondo 2015 University of Wollongong

Micro Sheet Hydroforming Process Of Ultra-Thin Pure Titanium Foil, Hideki Sato, Kenichi Manabe, Dongbin Wei, Zhengyi Jiang, Daiki Kondo

Faculty of Engineering and Information Sciences - Papers

A micro hydromechanical deep drawing is carried out using the pure titanium and the effect of fluid pressure on formability of pure titanium is investigated. The experiments are performed using the two kinds of pure titanium foils (TR270C-H and TR270C-O) and stainless steel foil (SUS304-H) with 50 thickness and the cylindrical and conical punches. As a result, it is found that the peeling off the oxide film of pure titanium can be reduced by applying the fluid pressure because the friction force and contact pressure between the blank and die decreases. However, the formability is lower for pure titanium than ...


Influence Of Loading Conditions During Tensile Testing On Acoustic Emission, Turbadrakh Chuluunbat, Cheng Lu, Andrii Kostryzhev, A Kiet Tieu 2015 University of Wollongong

Influence Of Loading Conditions During Tensile Testing On Acoustic Emission, Turbadrakh Chuluunbat, Cheng Lu, Andrii Kostryzhev, A Kiet Tieu

Faculty of Engineering and Information Sciences - Papers

The Acoustic Emission (AE) monitoring technique is widely used in mechanical and material research for detection of plastic deformation, fracture initiation and crack growth. However, the influence of AE features (such as signal amplitude, frequency, rise time and duration) on the fracture parameters (such as brittle or ductile mode of propagation and fracture propagation speed) is not completely understood. In this paper, the effect of loading conditions on fracture behavior was studied using AE monitoring during tensile testing of an aluminum alloy specimen. The fracture development was observed using a high speed video camera and was analyzed using the finite ...


Microgrid Capability Diagram: A Tool For Optimal Grid-Tied Operation, Athmi Jayawardena, Lasantha Meegahapola, Duane A. Robinson, Sarath Perera 2015 University of Wollongong

Microgrid Capability Diagram: A Tool For Optimal Grid-Tied Operation, Athmi Jayawardena, Lasantha Meegahapola, Duane A. Robinson, Sarath Perera

Faculty of Engineering and Information Sciences - Papers

The microgrid paradigm has gained much interest in the electricity industry due to the increased penetration of distributed resources. A grid-tied microgrid can be viewed as a single generating entity or a load depending on its power export and import at the grid supply point. Similar to conventional generators, grid-tied microgrids have the potential to be able to participate in the energy market in the future to achieve technical, financial and environmental benefits. Effective participation in the energy markets requires numerous planning tools and a comprehensive understanding of the full capability of the microgrid. This paper presents a systematic approach ...


Coupled Discrete Element-Finite Difference Method For Analysing The Load-Deformation Behaviour Of A Single Stone Column In Soft Soil, Buddhima Indraratna, Ngoc Trung Ngo, Cholachat Rujikiatkamjorn, Scott W. Sloan 2015 University of Wollongong

Coupled Discrete Element-Finite Difference Method For Analysing The Load-Deformation Behaviour Of A Single Stone Column In Soft Soil, Buddhima Indraratna, Ngoc Trung Ngo, Cholachat Rujikiatkamjorn, Scott W. Sloan

Faculty of Engineering and Information Sciences - Papers

Experimental studies and numerical modelling of the deformation of soft clay stabilised by stone columns have been conducted over the past few decades. Continuum-based numerical models have provided valuable insight into the prediction of settlement, lateral deformation, and stress and strain-rate dependent behaviour of stone columns at a macroscopic scale, but because they consist of granular material such as crushed rock, gravel, and waste rock aggregates, their behaviour is influenced by inter-particle micromechanics and cannot be modelled properly using these models. In this paper a novel coupled model of the discrete element method (DEM) and finite difference method (FDM) is ...


A Subspace Projection Approach For Wall Clutter Mitigation In Through-The-Wall Radar Imaging, Fok Hing Chi Tivive, Abdesselam Bouzerdoum, Moeness Amin 2015 University of Wollongong

A Subspace Projection Approach For Wall Clutter Mitigation In Through-The-Wall Radar Imaging, Fok Hing Chi Tivive, Abdesselam Bouzerdoum, Moeness Amin

Faculty of Engineering and Information Sciences - Papers

One of the main challenges in through-the-wall radar imaging (TWRI) is the strong exterior wall returns, which tend to obscure indoor stationary targets, rendering target detection and classification difficult, if not impossible. In this paper, an effective wall clutter mitigation approach is proposed for TWRI that does not require knowledge of the background scene nor does it rely on accurate modeling and estimation of wall parameters. The proposed approach is based on the relative strength of the exterior wall returns compared to behind-wall targets. It applies singular value decomposition to the data matrix constructed from the space-frequency measurements to identify ...


Application Of The Largest Lyapunov Exponent Algorithm For Feature Extraction In Low Speed Slew Bearing Condition Monitoring, Wahyu Caesarendra, Prabuono Buyung Kosasih, A Kiet Tieu, Craig A. S Moodie 2015 University of Wollongong

Application Of The Largest Lyapunov Exponent Algorithm For Feature Extraction In Low Speed Slew Bearing Condition Monitoring, Wahyu Caesarendra, Prabuono Buyung Kosasih, A Kiet Tieu, Craig A. S Moodie

Faculty of Engineering and Information Sciences - Papers

This paper presents a new application of the largest Lyapunov exponent (LLE) algorithm for feature extraction method in low speed slew bearing condition monitoring. The LLE algorithm is employed to measure the degree of non-linearity of the vibration signal which is not easily monitored by existing methods. The method is able to detect changes in the condition of the bearing and demonstrates better tracking of the progressive deterioration of the bearing during the 139 measurement days than comparable methods such as the time domain feature methods based on root mean square (RMS), skewness and kurtosis extraction from the raw vibration ...


Oxide Scale Characterization Of Ferritic Stainless Steel And Its Deformation And Friction In Hot Rolling, Xiawei Cheng, Zhengyi Jiang, Dongbin Wei, Liang HAO, Jingwei Zhao, Laizhu Jiang 2015 University of Wollongong

Oxide Scale Characterization Of Ferritic Stainless Steel And Its Deformation And Friction In Hot Rolling, Xiawei Cheng, Zhengyi Jiang, Dongbin Wei, Liang Hao, Jingwei Zhao, Laizhu Jiang

Faculty of Engineering and Information Sciences - Papers

The oxidation kinetics of ferritic stainless steel 430 was studied in dry and humid air at 1090 °C by Thermo Gravimetric Analysis (TGA). Different atmospheres and heating times were adopted for reheating to obtain different compositions and thickness of the oxide scale. Hot rolling was performed on a 2-high Hille 100 experimental rolling mill at various reductions. Oxide scale thickness and composition were analysed with optical microscopy (OM), scanning electron microscope (SEM) and X-ray diffraction (XRD). The surface profiles were examined by a digital microscope, and the topographic features of the thin oxide scale surface were examined with an atomic ...


A Preliminary Study Of Distracted Driving, Sarina Karwande, Ashley Nieto, Lauren Rhodes 2014 Chapman University

A Preliminary Study Of Distracted Driving, Sarina Karwande, Ashley Nieto, Lauren Rhodes

Undergraduate Student Research Day Abstracts and Posters

The Centers for Disease Control (CDC) report distracted driving is a “problem on the rise” with increasing numbers injuries and deaths each year. More than 9 people are killed each day while more than 1,153 people are injured in crashes involving a distracted driver. Specifically, the number one killer of adolescents (ages 15-24) is automobile related deaths due to distracted driving. One of the most dangerous forms of distracted driving is texting while driving because it combines all three types of distraction: visual, manual, and cognitive. Texting and driving is a growing public safety hazard as seen through media ...


"Flight Test Of Communications In Space Via Commercial Communications Satellite Networks On-Board Suborbital Rlv And High Altitude Balloon: Implications For Space Traffic Management", M. Brian Barnett 2014 Embry-Riddle Aeronautical University

"Flight Test Of Communications In Space Via Commercial Communications Satellite Networks On-Board Suborbital Rlv And High Altitude Balloon: Implications For Space Traffic Management", M. Brian Barnett

Space Traffic Management Conference

Over the past several years, Satwest has conducted a number of near space and suborbital spaceflight tests demonstrating the effective use of commercial communication satellite networks for communication to and from vehicles and payloads in space. In June 2013, Satwest’s space communications technology was selected by NASA’s Flight Opportunities Program (FOP) for test and development. Satwest has flown two successful payloads into space through the FOP thus far. This paper describes the results of these commercial tests and flight tests through FOP and their potential application to space traffic management through the National Air Space (NAS) and beyond ...


Contemporary Quaker Attitudes To Science And Technology, Jackie Leach Scully 2014 George Fox University

Contemporary Quaker Attitudes To Science And Technology, Jackie Leach Scully

Quaker Studies

I discuss some data on contemporary Quaker attitudes to science, particularly gene technology, gathered from member of Britain Yearly Meeting. Quakers are often perceived as having a relatively positive attitude towards innovation, including technology, and some confirmation of this can be found in Quaker history, until 30 years ago. The observations described in this paper suggest that, in line with the general trend in the west towards a greater skepticism about the benefits of science, the current attitude of British Friends towards the practice of science is a more ambivalent or even negative one, although attitudes towards the scientific/experimental ...


Ship Space To Database: Motivations To Manage Research Data For The Deep Subseafloor Biosphere, Peter Darch, Christine L. Borgman 2014 SelectedWorks

Ship Space To Database: Motivations To Manage Research Data For The Deep Subseafloor Biosphere, Peter Darch, Christine L. Borgman

Peter Darch

What motivates the building of databases by scientific collaborations? In this paper, we argue that not only are databases being built to support scientific work per se, but also with the intention of performing a variety of social functions. To explore this, we present findings from a longitudinal ethnographic case study of a large, multidisciplinary, distributed scientific project studying subseafloor microbial life. A critical element of this project’s Data Management Plan is the construction of a data portal. We found a range of factors motivating not only the very construction of this portal, but also the inclusion of particular ...


An Analysis Of Mayo Clinic Search Query Logs For Cardiovascular Diseases, Ashutosh Sopan Jadhav, Amit P. Sheth, Jyotishman Pathak 2014 Wright State University

An Analysis Of Mayo Clinic Search Query Logs For Cardiovascular Diseases, Ashutosh Sopan Jadhav, Amit P. Sheth, Jyotishman Pathak

Kno.e.sis Publications

Increasingly, individuals are taking active participation in learning and managing their health by leveraging online resources. Understanding online health information searching behavior can help us to study what health topics users search for and how search queries are formulated. In this work, we analyzed 10 million cardiovascular diseases (CVD) related search queries from MayoClinic.com. We performed semantic analysis on the queries using UMLS MetaMap and analyzed structural and textual properties as well as linguistic characteristics of the queries.


Online Information Searching For Cardiovascular Diseases: An Analysis Of Mayo Clinic Search Query Logs, Ashutosh Sopan Jadhav, Amit P. Sheth, Jyotishman Pathak 2014 Wright State University

Online Information Searching For Cardiovascular Diseases: An Analysis Of Mayo Clinic Search Query Logs, Ashutosh Sopan Jadhav, Amit P. Sheth, Jyotishman Pathak

Kno.e.sis Publications

Since the early 2000’s, Internet usage for health information searching has increased significantly. Studying search queries can help us to understand users “information need” and how do they formulate search queries (“expression of information need”). Although cardiovascular diseases (CVD) affect a large percentage of the population, few studies have investigated how and what users search for CVD. We address this knowledge gap in the community by analyzing a large corpus of 10 million CVD related search queries from MayoClinic.com. Using UMLS MetaMap and UMLS semantic types/concepts, we developed a rule-based approach to categorize the queries into 14 ...


Technology And Power, Michael J. Paulus Jr. 2014 Seattle Pacific University

Technology And Power, Michael J. Paulus Jr.

Michael J. Paulus Jr.

No abstract provided.


Technology And Power, Michael J. Paulus Jr. 2014 Seattle Pacific University

Technology And Power, Michael J. Paulus Jr.

SPU Works

No abstract provided.


Creativity In Scientific Teams: Unpacking Novelty And Impact, You-Na Lee, John P. Walsh, Jian Wang 2014 SelectedWorks

Creativity In Scientific Teams: Unpacking Novelty And Impact, You-Na Lee, John P. Walsh, Jian Wang

Jian Wang

The increasing dominance of team science highlights the importance of understanding the effects of team composition on the creativity of research results. In this paper, we analyze the effect of team size, and field and task variety on creativity. Furthermore, we unpack two facets of creativity in science: novelty and impact. We find that increasing team size has an inverted-U shaped relation with novelty. We also find that the size–novelty relationship is largely due to the relation between size and team field or task variety, consistent with the information processing perspective. On the other hand, team size has a ...


Measurable Outcomes Of Safety Culture In Aviation - A Meta-Analytic Review, Benjamin J. Goodheart, MaryJo O. Smith 2014 Embry-Riddle Aeronautical University

Measurable Outcomes Of Safety Culture In Aviation - A Meta-Analytic Review, Benjamin J. Goodheart, Maryjo O. Smith

International Journal of Aviation, Aeronautics, and Aerospace

Though the complimentary concepts of safety culture and safety climate have become increasingly popular over the past three decades, they have only infrequently been central to research designed to examine the empirical relationship between safety culture and safety performance. This tenuous link between culture and safety performance outcomes is especially prevalent in the aviation sector. This study systematically examined the existing literature for empirical evidence and explored the available data via meta-analysis to determine whether safety culture was significantly predictive of safety performance in an aviation operational environment. Although a broad, careful review of the literature was accomplished, the results ...


Nanotechnology Research And Innovation In Russia: A Bibliometric Analysis, Maria Karaulova, Oliver Shackleton, Abdullah Gök, Maxim Kotsemir, Philip Shapira 2014 SelectedWorks

Nanotechnology Research And Innovation In Russia: A Bibliometric Analysis, Maria Karaulova, Oliver Shackleton, Abdullah Gök, Maxim Kotsemir, Philip Shapira

Philip Shapira

This working paper presents findings from analyses of Russian nanotechnology outputs in publications and patents focusing on developments over the period 1990 through to 2012. The investigation draws on bibliometric datasets of scientific journal publications and patents and on available secondary English-language and Russian sources.

The document provides both an overview and detailed analyses of nanotechnology research and innovation in Russia. The examination of publications highlights sectoral trends, leading authors and organizations, and acknowledgements to funding sources. The analysis of patents adds further evidence about patterns of invention and ownership of intellectual property emanating from research and development in Russian ...


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