Open Access. Powered by Scholars. Published by Universities.®

Science and Technology Studies Commons

Open Access. Powered by Scholars. Published by Universities.®

2008

Discipline
Institution
Keyword
Publication
Publication Type
File Type

Articles 181 - 207 of 207

Full-Text Articles in Science and Technology Studies

Shi's Local Estimates, Glen Wheeler Jan 2008

Shi's Local Estimates, Glen Wheeler

Faculty of Engineering and Information Sciences - Papers: Part A

The talk is concerned with some of the analytic results and techniques that are fundamental to the study of the qualitative behavior of solutions of the Ricci flow, later used in singularity analysis. In particular we focus on derivatives estimates, useful for proving long time existence of solutions and obtaining local control of solutions.


An Analysis Of The Criteria For Evaluating Adequate Theories Of Computation, Nir Fresco Jan 2008

An Analysis Of The Criteria For Evaluating Adequate Theories Of Computation, Nir Fresco

Faculty of Engineering and Information Sciences - Papers: Part A

This paper deals with the question: What are the criteria that an adequate theory of computation has to meet? (1) Smith's answer: it has to meet the empirical criterion (i.e. doing justice to computational practice), the conceptual criterion (i.e. explaining all the underlying concepts) and the cognitive criterion (i.e. providing solid grounds for computationalism). (2) Piccinini's answer: it has to meet the objectivity criterion (i.e. identifying computation as a matter of fact), the explanation criterion (i.e. explaining the computer's behaviour), the right things compute criterion, the miscomputation criterion (i.e. accounting for ...


Distributed Generation Diversity Level For Optimal Investment Planning, An D. T Le, M A. Kashem, Michael Negnevitsky, G Ledwich Jan 2008

Distributed Generation Diversity Level For Optimal Investment Planning, An D. T Le, M A. Kashem, Michael Negnevitsky, G Ledwich

Faculty of Engineering and Information Sciences - Papers: Part A

The task of improving the supply quality and maintaining supply continuity during emergencies has become more feasible for a distribution company (DISCO), owing to new developments in Distributed Generation (DG) technologies. Even though the technical issues regarding DG interconnection to the main grid are of great importance and are being addressed by on-going research, it must be clearly placed in the context of on the financial performance of the utility. In this paper, a general approach to quantify the technical benefits of DG employment is proposed. The power system economic impact is assessed by evaluating supply quality, supply reliability, system ...


Differential Equations And Asymptotic Solutions For Arithmetic Asian Options: 'Black-Scholes Formulae' For Asian Rate Calls, Jeffrey Dewynne, William Shaw Jan 2008

Differential Equations And Asymptotic Solutions For Arithmetic Asian Options: 'Black-Scholes Formulae' For Asian Rate Calls, Jeffrey Dewynne, William Shaw

Faculty of Engineering and Information Sciences - Papers: Part A

In this article, we present a simplified means of pricing Asian options using partial differential equations (PDEs). We first provide a concise derivation of the well-known similarity reduction and exact Laplace transform solution. We then analyse the problem afresh as a power series in the volatility-scaled contract duration, with a view to obtaining an asymptotic solution for the low-volatility limit, a limit which presents difficulties in the context of the general Laplace transform solution. The problem is approached anew from the point of view of asymptotic expansions and the results are compared with direct, high precision, inversion of the Laplace ...


Berkovich Indentation Of Diamondlike Carbon Coatings On Silicon Substrates, Ayesha J. Haq, Paul Munroe, Mark Hoffman, Phil Martin, Avi Bendavid Jan 2008

Berkovich Indentation Of Diamondlike Carbon Coatings On Silicon Substrates, Ayesha J. Haq, Paul Munroe, Mark Hoffman, Phil Martin, Avi Bendavid

Faculty of Engineering and Information Sciences - Papers: Part A

The deformation behavior of diamondlike carbon (DLC) coatings on silicon substrates induced by Berkovich indentation has been investigated. DLC coatings deposited by a plasma-assisted chemical vapor deposition technique were subjected to nanoindentation with a Berkovich indenter over a range of maximum loads from 100 to 300 mN. Distinct pop-ins were observed for loads greater than 150 mN. However, no pop-out was observed for the loads studied. The top surface of the indents showed annular cracks with associated fragmented material. The cross sections showed up to 20% localized reduction in thickness of the DLC coating beneath the indenter tip. Cracking, {111 ...


Enhancing Information Flow In A Retail Supply Chain Using Rfid And The Epc Network: A Proof-Of-Concept Approach, Samuel Fosso Wamba, Harold Boeck Jan 2008

Enhancing Information Flow In A Retail Supply Chain Using Rfid And The Epc Network: A Proof-Of-Concept Approach, Samuel Fosso Wamba, Harold Boeck

Faculty of Engineering and Information Sciences - Papers: Part A

RFID technology and the Electronic Product Code (EPC) network have attracted considerable interest from businesses and academics in recent years. The interest is even stronger in the retail industry where firms such as Best Buy, Wal-Mart, Tesco, Target and Metro AG are capitalizing on the potential of these technologies. Based on a field study conducted in a three-layer retail supply chain, this paper tests several scenarios integrating Radio Frequency Identification (RFID) technology and the EPC network and evaluates, in a laboratory setting, their potential as enablers of information flow within a retail supply chain. Using an "open-loop" adoption strategy, our ...


Fitting Position Latent Cluster Models For Social Networks With Latentnet, Pavel N. Krivitsky, M Handcock Jan 2008

Fitting Position Latent Cluster Models For Social Networks With Latentnet, Pavel N. Krivitsky, M Handcock

Faculty of Engineering and Information Sciences - Papers: Part A

latentnet is a package to fit and evaluate statistical latent position and cluster models for networks. Hoff, Raftery, and Handcock (2002) suggested an approach to modeling networks based on positing the existence of an latent space of characteristics of the actors. Relationships form as a function of distances between these characteristics as well as functions of observed dyadic level covariates. In latentnet social distances are represented in a Euclidean space. It also includes a variant of the extension of the latent position model to allow for clustering of the positions developed in Handcock, Raftery, and Tantrum (2007). The package implements ...


Fabrication And Characterisation Of Periodically Poled Lithium Niobate Waveguide Using Femtosecond Laser Pulses, Shuanggen Zhang, Jianghong Yao, Qing Shi, Yange Liu, Weiwei Liu, Zhangchao Huang, Fuyun Lu, Enbang Li Jan 2008

Fabrication And Characterisation Of Periodically Poled Lithium Niobate Waveguide Using Femtosecond Laser Pulses, Shuanggen Zhang, Jianghong Yao, Qing Shi, Yange Liu, Weiwei Liu, Zhangchao Huang, Fuyun Lu, Enbang Li

Faculty of Engineering and Information Sciences - Papers: Part A

We present in this letter the fabrication and characterization of thermally stable type II waveguides in Z-cut periodically poled lithium niobate crystals. The waveguides were fabricated by using a femtosecond laser and were utilized for second harmonic generation. Our experiments have shown that a quasiphase matching wavelength of 1548.2nm, a tuning bandwidth of 2nm, and a tuning temperature range of 150.4±1.6°C can be achieved.


High Spatial Resolution Fibre -Optic Fizeau Interferometric Strain Sensor Based On An In-Fiber Spherical Microcavity, Enbang Li, Gang-Ding Peng, Xin Ding Jan 2008

High Spatial Resolution Fibre -Optic Fizeau Interferometric Strain Sensor Based On An In-Fiber Spherical Microcavity, Enbang Li, Gang-Ding Peng, Xin Ding

Faculty of Engineering and Information Sciences - Papers: Part A

We present a fiber-optic Fizeau interferometric strain sensor consisting of an in-fiber spherical microcavity of 39um in diameter. The spherical microcavity was formed by splicing a normal single-mode fiber with a hollow-core photonic crystal fiber. We demonstrate that strain sensing can be realized by using the interference between the light signals reflected by the front and rear surfaces of the sphere. Experiments have shown that the strain sensor has a strain sensitivity of 3.36um/ue and a temperature sensitivity of 1.35um/°C.


Study Of The Energy Performance Of Korean Apartment Buildings With Alternative Balcony Configurations, Jo Clarke, Cameron Johnstone, Jaemin Kim, Georgios Kokogiannakis, Paul Strachan, Kyung-Hun Woo, Boo-Sik Kang Jan 2008

Study Of The Energy Performance Of Korean Apartment Buildings With Alternative Balcony Configurations, Jo Clarke, Cameron Johnstone, Jaemin Kim, Georgios Kokogiannakis, Paul Strachan, Kyung-Hun Woo, Boo-Sik Kang

Faculty of Engineering and Information Sciences - Papers: Part A

The purpose of this study is to evaluate the impact of the new regulations design changes on heating loads of apartment buildings and identify the construction configurations (e.g. glazing types, thermal properties, window area ratio, etc.) of the new designs that will ensure the energy performance is at least on the same level as those with a traditional balcony configuration.


Gas Drainage Improvement In Underground Coal Mines, Dennis John Black, Naj Aziz Jan 2008

Gas Drainage Improvement In Underground Coal Mines, Dennis John Black, Naj Aziz

Faculty of Engineering and Information Sciences - Papers: Part A

Effective gas management is vital to the success of the longwall mining in the Bulli seam, in the Southern Coalfield, Sydney Basin, NSW, Australia. The evolution of gas drainage methods and practices are discussed with respect to gas type, gas drainage lead time and prevailing geological conditions. Both underground to inseam drilling and surface to inseam drilling techniques are described at both pre and post-drainage conditions. Post-drainage of gas from longwall is discussed for its effectiveness, practicability and efficiency. The long term benefit of the method selected is examined with respect to gas capture efficiency. An alternative method of surface ...


Hydraulic Fracturing In Underground Coal Mines, Dennis John Black, Naj Aziz Jan 2008

Hydraulic Fracturing In Underground Coal Mines, Dennis John Black, Naj Aziz

Faculty of Engineering and Information Sciences - Papers: Part A

The success of hydraulic fracturing application in stimulating gas drainage from coal seams is influenced by the ground stress conditions and the effective installation of straddled packers. A total of five holes were drilled in the Bulli Seam in a mine (Mine A) and tested for increased gas stimulation by hydraulic fracturing. Parameters examined included casing material integrity for cutability and ability to resist the external collapse during grouting and hydraulic fracturing. Changes made to the injecti on pressure, casing wall thickness, slot orientation (circumferential instead of axial) and controlled pressure release rate post-treatment improved the hydraulic fracturing treatment. However ...


Development Of Hydraulic Fracturing In High Stress Conditions In Australian Underground Coal Mines, Dennis John Black, Naj Aziz Jan 2008

Development Of Hydraulic Fracturing In High Stress Conditions In Australian Underground Coal Mines, Dennis John Black, Naj Aziz

Faculty of Engineering and Information Sciences - Papers: Part A

Hydraulic fracturing has been used extensively in the petroleum and coalbed methane industries as a means of improving access to the reservoir and thereby enhancing production. In the Australian coal mining industry there has been an aversion to the use of hydraulic fracturing. One of the main reasons for the lack of application of this technology has been the perceived risk of damage to the strata and the resulting impact on future mining operations. A number of Australian mines are progressing toward areas where gas drainage is becoming increasingly difficult and these mines are seriously considering the use of hydraulic ...


Improving Uis Gas Drainage In Underground Coal Mines, Dennis John Black, Naj Aziz Jan 2008

Improving Uis Gas Drainage In Underground Coal Mines, Dennis John Black, Naj Aziz

Faculty of Engineering and Information Sciences - Papers: Part A

Gas drainage is considered one of the most effective controls in preventing coal and gas outbursts. The advances in mining equipment technology over the last 20 years have led to a significant increase in coal mine production, resulting in increased coal mine gas emission during the coal extraction process. High gas emissions, if not effectively managed, may exceed the diluting capability of the mine's ventilation system, potentially exceeding the statutory limit, resulting in gas related production delays. The development of underground to inseam (UIS) gas drainage is discussed. The study is focused on a range of factors which impact ...


Formal Security Definition And Efficient Construction For Roaming With A Privacy-Preserving Extension, Guomin Yang, Duncan S. Wong, Xiaotie Deng Jan 2008

Formal Security Definition And Efficient Construction For Roaming With A Privacy-Preserving Extension, Guomin Yang, Duncan S. Wong, Xiaotie Deng

Faculty of Engineering and Information Sciences - Papers: Part A

In a secure roaming scenario, a user U travels to a foreign network and communicates with a foreign server V securely so that no one other than U and V can obtain the messages exchanged between them. U may also want to travel anonymously so that no one including V can find out its identity or trace its whereabouts except its home server H. There have been many key establishment protocols proposed for secure roaming. A typical application of these protocols is the mobile roaming service which may be deployed to interconnected WLAN and 3G networks. Despite the importance of ...


Research In The Biotech Age: Can Informational Privacy Compete?, Wilhelm Peekhaus Jan 2008

Research In The Biotech Age: Can Informational Privacy Compete?, Wilhelm Peekhaus

Wilhelm Peekhaus

This paper examines the privacy of personal medical information in the health research context. Arguing that biomedical research in Canada has been caught up in the government’s broader neo-liberal policy agenda that has positioned biotechnology as a strategic driver of economic growth, the author discusses the tension between informational privacy and the need for medical information for research purposes. Consideration is given to the debate about whether privacy for medical information serves or hinders the ‘public good’ in respect of medical research, and to discussions of informed consent as an element of ‘fair information practices’ designed to safeguard the ...


The Multiple Discourses Of Science-Society Engagement, Judith Motion, S. R. Leitch Jan 2008

The Multiple Discourses Of Science-Society Engagement, Judith Motion, S. R. Leitch

Faculty of Commerce - Papers (Archive)

A meta-analysis of the changing science –society discourses that played out in New Zealand after the lifting of a moratorium on applications for the release of genetically modified organisms is provided in this article. It highlights the tension between the scientific focus on knowledge and societal values, beliefs and emotions and the need for a democratized discursive space for societal engagement with science. A key contribution of the article is identification of the role of altruistic discourses in societal considerations of controversial scientific innovations.


Users 2.0: Technology At Your Service, Darcy C. Del Bosque, Kimberly Chapman Jan 2008

Users 2.0: Technology At Your Service, Darcy C. Del Bosque, Kimberly Chapman

Library Faculty Publications

It is exciting, as practicing librarians, to find a singular voice that stands out as a strong influence on the profession. Anne Grodzins Lipow provided one such voice, inspiring us to evaluate our philosophy of patron service and helping us define our professional values. Lipow’s body of work encompasses many contemporary library issues, involving myriad aspects of customer service. Lipow addressed issues including patron-friendly catalogs and reference service in both traditional face-to-face and newer virtual settings, recognized the importance of training staff as part of continuous improvement in customer service, and emphasized the power of using technology to improve ...


Development Of Face Recognition System Using Verilook Software Development Kit, Paras Pradhan Jan 2008

Development Of Face Recognition System Using Verilook Software Development Kit, Paras Pradhan

Masters Theses

No abstract provided.


Anxiety, Graduate Students, And New Student Orientation Programs: A Quantitative Study, Megan M. Hullinger Jan 2008

Anxiety, Graduate Students, And New Student Orientation Programs: A Quantitative Study, Megan M. Hullinger

Masters Theses

No abstract provided.


A Qualitative Analysis Of The Integration Of Technology At The School District Level In Terms Of The Technology Leadership, Management, And Policy Pyramid: A Theoretical Model Developed By Dr. John Collins, Through The Perceptions Of Technology-Using Teachers, Mark A. Connolly Jan 2008

A Qualitative Analysis Of The Integration Of Technology At The School District Level In Terms Of The Technology Leadership, Management, And Policy Pyramid: A Theoretical Model Developed By Dr. John Collins, Through The Perceptions Of Technology-Using Teachers, Mark A. Connolly

Seton Hall University Dissertations and Theses (ETDs)

.


Automated Estimation Of Time Codes For Captioning Digital Media, Daniel P. Harvey Ii Jan 2008

Automated Estimation Of Time Codes For Captioning Digital Media, Daniel P. Harvey Ii

Masters Theses

No abstract provided.


Development Of Plain Carbon And Niobium Microalloyed Ultra-Thin Cast Strip Products Produced By The Castrip® Process, Chris R. Killmore, Harold R. Kaul, Joshua Burg, Kristin R. Carpenter, James G. Williams, Daniel G. Edelman, Peter C. Campbell, Walter N. Blejde Jan 2008

Development Of Plain Carbon And Niobium Microalloyed Ultra-Thin Cast Strip Products Produced By The Castrip® Process, Chris R. Killmore, Harold R. Kaul, Joshua Burg, Kristin R. Carpenter, James G. Williams, Daniel G. Edelman, Peter C. Campbell, Walter N. Blejde

Faculty of Engineering and Information Sciences - Papers: Part B

The CASTRIP facility at Nucor Steel's Crawfordsville, Indiana plant is the world's first commercial installation for production of Ultra-Thin Cast Strip (UCS), via twin-roll strip casting. The facility has been producing plain, low-carbon sheet steel since 2002, with a range of structural grades available. The paper outlines some of the main parameters that influence the final microstructure and resultant mechanical properties of plain, low carbon UCS steels that have been recently made by the CASTRIP process, and then describes new Nb microalloyed UCS products that have been made in the CASTRIP process, significantly expanding the range of thin ...


Environment And Development In Uganda: Understanding The Global Influence On Domestic Policy, Christopher Gore Dec 2007

Environment And Development In Uganda: Understanding The Global Influence On Domestic Policy, Christopher Gore

Christopher D Gore

No abstract provided.


Healthy Urban Food Production And Local Government, Christopher Gore Dec 2007

Healthy Urban Food Production And Local Government, Christopher Gore

Christopher D Gore

No abstract provided.


Electricity And Privatization In Uganda: The Origins Of Crisis And Problems With Response, Christopher Gore Dec 2007

Electricity And Privatization In Uganda: The Origins Of Crisis And Problems With Response, Christopher Gore

Christopher D Gore

No abstract provided.


UbiquitäRes Computing Und Seine Auswirkungen Auf Die Industriearbeit, Ralf Lindner, Michael Friedewald Dec 2007

UbiquitäRes Computing Und Seine Auswirkungen Auf Die Industriearbeit, Ralf Lindner, Michael Friedewald

Michael Friedewald

Ubiquitäres Computing (UbiComp) bezeichnet eine alles durchdringende Informatisierung und Ver- netzung u.a. auch im Arbeitsleben. Es fügt sich in der industriellen Fertigung in die seit langem zu beobachtenden Trends der Rationalisierung und Flexibilisierung ein, beschleunigen diese und ver- stärken zum Teil deren Auswirkungen auf innerbetriebliche Prozesse. Mit Blick auf Tätigkeitsprofile und Qualifikationsanforderungen sind zwei gegenläufigen Folgen von UbiComp zu erwarten: Einer- seits werden bestimmte Tätigkeiten in der industriellen Fertigung eine qualitative Anreicherung und Erweiterung erfahren, während andererseits erweiterte Möglichkeiten zur Automatisierung von einfa- chen Kontroll-, Überwachungs- und anderen manuellen Ta ...