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55,695 full-text articles. Page 1 of 1059.

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.


Understanding The Methods Behind Cyber Terrorism, Maurice E. Dawson Jr., Marwan Omar, Jonathan Abramson 2015 SelectedWorks

Understanding The Methods Behind Cyber Terrorism, Maurice E. Dawson Jr., Marwan Omar, Jonathan Abramson

Maurice Dawson

Cyber security has become a matter of national, international, economic, and societal importance that affects multiple nations (Walker, 2012). Since the 1990s users have exploited vulnerabilities to gain access to networks for malicious purposes. In recent years the number of attacks on U.S. networks has continued to grow at an exponential rate. This includes malicious embedded code, exploitation of backdoors, and more. These attacks can be initiated from anywhere in the world from behind a computer with a masked Internet Protocol (IP) address. This type of warfare, cyber warfare, changes the landscape of war itself (Beidleman, 2009). This type ...


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 ...


Electronic Supplement: Value Focused Thinking For Community-Based Organizations: Objectives And Acceptance In Local Development, Jeffrey Keisler, David A. Turcotte, Rachel B. Drew, Michael P. Johnson Jr. 2015 University of Massachusetts Boston

Electronic Supplement: Value Focused Thinking For Community-Based Organizations: Objectives And Acceptance In Local Development, Jeffrey Keisler, David A. Turcotte, Rachel B. Drew, Michael P. Johnson Jr.

Michael P. Johnson

This is an electronic supplement to the manuscript "Value Focused Thinking for Community-Based Organizations: Objectives and Acceptance in Local Development", to appear in European Journal of Decision Processes.


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 ...


Advances In Technology Project Management: Review Of Open Source Software Integration, Maurice Dawson, Brian Leonard, Emad Rahim 2015 SelectedWorks

Advances In Technology Project Management: Review Of Open Source Software Integration, Maurice Dawson, Brian Leonard, Emad Rahim

Maurice Dawson

As organizations must continually drive down costs of software-driven projects, they need to evaluate the Systems Development Life Cycle (SDLC) and other software-based design methodologies. These methodologies include looking at software-based alternatives that could save a significant amount of money by reducing the amount of proprietary software. This chapter explores the use and integration of Open Source Software (OSS) in software-driven projects to include in enterprise organizations. Additionally, the legalities of the GNU General Public License (GPL), Lesser General Public License (LGPL), Berkeley Software Distribution (BSD), and Creative Commons are explored with the integration of these OSS solutions into organizations ...


Sonocatalytic Removal Of An Organic Dye Using Tio2/Montmorillonite Nanocomposite, A.R. Khataee, M. Sheydaei, A. Hassani, M. Taseidifar, S. Karaca 2015 SelectedWorks

Sonocatalytic Removal Of An Organic Dye Using Tio2/Montmorillonite Nanocomposite, A.R. Khataee, M. Sheydaei, A. Hassani, M. Taseidifar, S. Karaca

Aydin Hassani

No abstract provided.


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 ...


A Reversible And Stable Flake-Like Licoo2 Cathode For Lithium Ion Batteries, Tao Wei, Rui Zeng, Yongming Sun, Yunhui Huang, Kevin Huang 2014 University of South Carolina

A Reversible And Stable Flake-Like Licoo2 Cathode For Lithium Ion Batteries, Tao Wei, Rui Zeng, Yongming Sun, Yunhui Huang, Kevin Huang

Faculty Publications

A dense and thick flake-like cathode structure was demonstrated to have a preferential crystallographic orientation for Li+ migration and a better tolerance to cracking, both of which enable a reversible and stable capacity at moderate rates from 0.1 to 2 C.


Applicability Of Fluidized Bed Reactor In Recalcitrant Compound Degradation Through Advanced Oxidation Processes: A Review, Abdul Aziz Abdul Raman 2014 SelectedWorks

Applicability Of Fluidized Bed Reactor In Recalcitrant Compound Degradation Through Advanced Oxidation Processes: A Review, Abdul Aziz Abdul Raman

Abdul Aziz Abdul Raman

Treatment of industrial waste water (e.g. textile waste water, phenol waste water, pharmaceutical etc) faces limitation in conventional treatment procedures. Advanced oxidation processes (AOPs) do not suffer from the limits of conventional treatment processes and consequently degrade toxic pollutants more efficiently. Complexity is faced in eradicating the restrictions of AOPs such as sludge formation, toxic intermediates formation and high requirement for oxidants. Increased mass-transfer in AOPs is an alternate solution to this problem. AOPs combined with Fluidized bed reactor (FBR) can be a potential choice compared to fixed bed or moving bed reactor, as AOP catalysts life-span last for ...


Realization (Part 6), Mahdiyeh Eslami (مهدیه اسلامی) 2014 SelectedWorks

Realization (Part 6), Mahdiyeh Eslami (مهدیه اسلامی)

Dr. Mahdiyeh Eslami (مهدیه اسلامی)

No abstract provided.


A Novel Transport Based Model For Wire Media And Its Application To Scattering Problems, Ebrahim Forati 2014 University of Wisconsin Milwaukee

A Novel Transport Based Model For Wire Media And Its Application To Scattering Problems, Ebrahim Forati

Theses and Dissertations

Artificially engineered materials, known as metamaterials, have attracted the interest of researchers because of the potential for novel applications. Effective modeling of metamaterials is a crucial step for analyzing and synthesizing devices. In this thesis, we focus on wire medium (both isotropic and uniaxial) and validate a novel transport based model for them.

Scattering problems involving wire media are computationally intensive due to the spatially dispersive nature of homogenized wire media. However, it will be shown that using the new model to solve scattering problems can simplify the calculations a great deal.

For scattering problems, an integro-differential equation based on ...


A Comparative Study Of Generalized Arc-Consistency Algorithms, Olufikayo S. Adetunji 2014 University of Nebraska - Lincoln

A Comparative Study Of Generalized Arc-Consistency Algorithms, Olufikayo S. Adetunji

Computer Science and Engineering: Theses, Dissertations, and Student Research

In this thesis, we study several algorithms for enforcing Generalized Arc­-Consistency (GAC), which is the most popular consistency property for solving Constraint Satisfaction Problems (CSPs) with backtrack search. The popularity of such algorithms stems from their relative low cost and effectiveness in improving the performance of search. Virtually all commercial and public- domain constraint solvers include some implementation of a generic GAC algorithm. In recent years, several algorithms for enforcing GAC have been proposed in the literature that relies on increasingly complex data structures and mechanisms to improve performance. In this thesis, we study, assess, and compare a basic ...


Observability (Part 5), Mahdiyeh Eslami (مهدیه اسلامی) 2014 SelectedWorks

Observability (Part 5), Mahdiyeh Eslami (مهدیه اسلامی)

Dr. Mahdiyeh Eslami (مهدیه اسلامی)

No abstract provided.


Controllability (Part 4), Mahdiyeh Eslami (مهدیه اسلامی) 2014 SelectedWorks

Controllability (Part 4), Mahdiyeh Eslami (مهدیه اسلامی)

Dr. Mahdiyeh Eslami (مهدیه اسلامی)

No abstract provided.


13 - تأثیر نفوذ هوا از درزهای پنجره بر عملکرد سیستم گرمایش قرنیزی و شرایط آسایش حرارتی ساکنان, Alireza Zolfaghari, Bahman Sekhavatmand 2014 SelectedWorks

13 - تأثیر نفوذ هوا از درزهای پنجره بر عملکرد سیستم گرمایش قرنیزی و شرایط آسایش حرارتی ساکنان, Alireza Zolfaghari, Bahman Sekhavatmand

Dr Alireza Zolfaghari

No abstract provided.


Linear Systems Theory (Part 3), Mahdiyeh Eslami (مهدیه اسلامی) 2014 SelectedWorks

Linear Systems Theory (Part 3), Mahdiyeh Eslami (مهدیه اسلامی)

Dr. Mahdiyeh Eslami (مهدیه اسلامی)

No abstract provided.


Seismic Retrofitting Of Existing Structures, Cetin Sahin 2014 Portland State University

Seismic Retrofitting Of Existing Structures, Cetin Sahin

Civil and Environmental Engineering Master's Project Reports

This research project will give a brief presentation about earthquake resistant design and the methodology about seismic evaluation and rehabilitation of existing structures. It also provides certain aspects of computer software modeling against seismic loads and shows the necessity of seismic upgrading in a steel moment-frame building.

The seismic evaluation process consists of investigating if the structure meets the defined target structural performance levels. The main goal during earthquakes is to assure that building collapse doesn’t occur and the risk of death or injury to people is minimized and beyond that to satisfy post-earthquake performance level for defined range ...


Improving Airplane Touchdown Control By Utilizing The Adverse Elevator Effect, Nihad E. Daidzic Ph.D., Sc.D. 2014 Embry-Riddle Aeronautical University

Improving Airplane Touchdown Control By Utilizing The Adverse Elevator Effect, Nihad E. Daidzic Ph.D., Sc.D.

International Journal of Aviation, Aeronautics, and Aerospace

The main objective of this original research article is to understand the short-term dynamic behavior of the transport-category airplane during landing flare elevator control application. Increasing the pitch angle to arrest the sink rate, the elevator will have to produce negative lift to rotate the airplane’s nose upward. This has an immediate adverse effect of initially accelerating airplane downward. A mathematical model of landing flare based on the flat-Earth longitudinal dynamics of rigid airplane was developed which is realistic only on very short time-scales as pitch stiffness and damping were neglected. Pilot control scenarios using impulse and step elevator ...


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