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Articles 1651 - 1680 of 2351

Full-Text Articles in Other Engineering

Cop-On To The Risks Of Buying Abroad, Lorcan Sirr Nov 2006

Cop-On To The Risks Of Buying Abroad, Lorcan Sirr

Media

No abstract provided.

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Atmospheric Chemistry Of A 33–34 Hour Old Volcanic Cloud From Hekla Volcano (Iceland): Insights From Direct Sampling And The Application Of Chemical Box Modeling, William I. Rose, Genevieve A. Millard, Tamsin A. Mather, Donald E. Hunton, Bruce Anderson, Clive Oppenheimer, Brett F. Thornton, Terrence M. Gerlach, Albert A. Viggiano, Yutaka Kondo, Thomas M. Miller, John O. Ballenthin Oct 2006

Atmospheric Chemistry Of A 33–34 Hour Old Volcanic Cloud From Hekla Volcano (Iceland): Insights From Direct Sampling And The Application Of Chemical Box Modeling, William I. Rose, Genevieve A. Millard, Tamsin A. Mather, Donald E. Hunton, Bruce Anderson, Clive Oppenheimer, Brett F. Thornton, Terrence M. Gerlach, Albert A. Viggiano, Yutaka Kondo, Thomas M. Miller, John O. Ballenthin

Department of Geological and Mining Engineering and Sciences Publications

On 28 February 2000, a volcanic cloud from Hekla volcano, Iceland, was serendipitously sampled by a DC-8 research aircraft during the SAGE III Ozone Loss and Validation Experiment (SOLVE I). It was encountered at night at 10.4 km above sea level (in the lower stratosphere) and 33–34 hours after emission. The cloud is readily identified by abundant SO2 (≤1 ppmv), HCl (≤70 ppbv), HF (≤60 ppbv), and particles (which may have included fine silicate ash). We compare observed and modeled cloud compositions to understand its chemical evolution. Abundances of sulfur and halogen species indicate some oxidation of sulfur gases but …

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Halogen Emissions From A Small Volcanic Eruption: Modeling The Peak Concentrations, Dispersion, And Volcanically Induced Ozone Loss In The Stratosphere, G. A. Millard, T. A. Mather, D. M. Pyle, William I. Rose, B. Thornton Oct 2006

Halogen Emissions From A Small Volcanic Eruption: Modeling The Peak Concentrations, Dispersion, And Volcanically Induced Ozone Loss In The Stratosphere, G. A. Millard, T. A. Mather, D. M. Pyle, William I. Rose, B. Thornton

Department of Geological and Mining Engineering and Sciences Publications

Aircraft measurements in the Hekla, Iceland volcanic plume in February 2000 revealed large quantities of hydrogen halides within the stratosphere correlated to volcanic SO2. Investigation of the longer-term stratospheric impact of these emissions, using the 3D chemical transport model, SLIMCAT suggests that volcanic enhancements of H2O and HNO3 increased HNO3·3H2O particle availability within the plume. These particles activated volcanic HCl and HBr, enhancing model plume concentrations of ClOx (20 ppb) and BrOx (50 ppt). Model O3 concentrations decreased to near-zero in places, and plume average O3 remained 30% lower after two weeks. Reductions in the model O3column reduced UV shielding …

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Technology Influences On Small Logistics Providers: A Case Study Analysis, Pietro Evangelista, Alan Mckinnon, Edward Sweeney Sep 2006

Technology Influences On Small Logistics Providers: A Case Study Analysis, Pietro Evangelista, Alan Mckinnon, Edward Sweeney

Conference papers

ICT has triggered many changes in the logistics service industry. New technology is reshaping the organisation and structure of this industry as ICT impacts significantly on the operations of 3PLs. Within this process, while large 3PLs are gaining substantial benefits from technology usage, the nature of changes resulting from ICT usage in small 3PLs remains unclear. This is critical particularly for those markets populated by a high number of small 3PLs such as the Italian logistics industry. From the research point of view, there is still a gap in the literature where the role of technological capability in small 3PLs …

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Outsourcing In Ireland: A Literature Review And Survey Perspective To Construct An Outsourcing Roadmap, Aoife O'Riordan, Edward Sweeney Sep 2006

Outsourcing In Ireland: A Literature Review And Survey Perspective To Construct An Outsourcing Roadmap, Aoife O'Riordan, Edward Sweeney

Conference papers

This paper investigates what is happening in Ireland at the moment regards outsourcing. It looks into the literature review and the survey conducted. The research took place over a period of two years, initially as a literature review, and then the survey was conducted through the mediums of e-mail and the postal service. The survey analysis found that Ireland was the most likely place for Irish companies to outsource to, and that nearly 40 percent of the companies that have been surveyed have started on their latest outsourcing initiative since 2004. This indicates that outsourcing is still important on the …

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Order And Disorder, Entropy In Math, Science, Nature And The Arts, Sol Neeman Ph.D., Arie Maharshak Jul 2006

Order And Disorder, Entropy In Math, Science, Nature And The Arts, Sol Neeman Ph.D., Arie Maharshak

Engineering Studies Faculty Publications and Creative Works

Often, science and engineering students have difficult time in viewing certain concepts in their holistic form. An example for such a concept is the concept of Entropy. Although it originated from the field of thermodynamics, the relation between order and disorder is a profound one and manifests itself in various fields, sometimes unrelated, such as math and science, nature and the arts. In the discipline of physics, the amount of disorder in a system has been quantified by the concept of Entropy. In the area of information theory it provides a quantitative measure of the amount of compression that may …

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A Multicultural Comparison Of Engineering Students, Zaki Shakir Seddigi, Luiz Fernando Capretz Apr 2006

A Multicultural Comparison Of Engineering Students, Zaki Shakir Seddigi, Luiz Fernando Capretz

Electrical and Computer Engineering Publications

A multicultural personality profile of engineering students is presented in this work. The Myers-Briggs Type Indicator (MBTI) was used as an instrument to sort personality types of engineering students at both King Fahd University of Petroleum and Minerals in Saudi Arabia and University of Western Ontario in Canada. The paper discusses the differences and similarities in the personality profile of Saudi and Canadian engineering students and its implications for engineering education in the light of the MBTI scales.

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Summer 2006, 90.9 Wmpg Fm Jan 2006

Summer 2006, 90.9 Wmpg Fm

WMPG Program Guides

Newspaper format. "The WMPG 'Zine"

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Dilthey And Simmel: A Reading From/Toward Buber's Philosophy Of History, Jules Simon Jan 2006

Dilthey And Simmel: A Reading From/Toward Buber's Philosophy Of History, Jules Simon

Selected Works Temporary Series

No abstract provided.

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Hegels Familienbegriff – Vermittelt Durch Rosenzweig: Darstellung Einer Eigentuemlichen Geschichte, Jules Simon Jan 2006

Hegels Familienbegriff – Vermittelt Durch Rosenzweig: Darstellung Einer Eigentuemlichen Geschichte, Jules Simon

Selected Works Temporary Series

No abstract provided.

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Sound Source Separation Using Shifted Non-Negative Tensor Factorisation, Eugene Coyle, Derry Fitzgerald, Matt Cranitch Jan 2006

Sound Source Separation Using Shifted Non-Negative Tensor Factorisation, Eugene Coyle, Derry Fitzgerald, Matt Cranitch

Conference papers

Recently, shifted non-negative Matrix Factorisation was developed as a means of separating harmonic instruments from single channel mixtures. However, in many cases two or more channels are available, in which case it would be advantageous to have a multichannel version of the algorithm. To this end, a shifted Non-negative Tensor Factorisation algorithm is derived, which extends shifted Non-negative Matrix Factoristiaon to the multi channel case. The use of this algorithm for multi-channel sound source separation of harmonic instruments is demonstrated. Further, it is shown that the algorithm can be used to perform Non-negative Tensor Deconvolution, to separate sound sources which …

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Recruiting First Year Engineering Undergraduates, Eddie Conlon Jan 2006

Recruiting First Year Engineering Undergraduates, Eddie Conlon

Conference papers

This paper presents findings of three surveys conducted with first year students in the Faculty of Engineering in the Dublin Institute of Technology. It presents evidence on the reasons students study engineering, their sources of information on higher education programmes and the people who influence their decision to do engineering. It shows there are gaps in the students’ knowledge of their programmes and also between their expectations and their experience of their course. Some proposed areas of action are identified to increase both recruitment and retention. It is argued that projecting an image of engineering as a creative activity would …

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Photopolymer Diffractive Optical Elements In Electronic Speckle Pattern Shearing Interferometry, Emilia Mihaylova, Izabela Naydenova, Barry Duignan, Suzanne Martin, Vincent Toal Jan 2006

Photopolymer Diffractive Optical Elements In Electronic Speckle Pattern Shearing Interferometry, Emilia Mihaylova, Izabela Naydenova, Barry Duignan, Suzanne Martin, Vincent Toal

Articles

In this paper we present an electronic speckle pattern shearing interferometer using a photopolymer diffractive optical element in the form of a holographic grating, in combination with a ground glass to shear the images. The sheared images on the ground glass are further imaged onto a CCD camera. The distance between the grating and the ground glass can be used to control the shear and to vary the sensitivity of the system. The direction of sensitivity is easily controlled by rotation of the diffraction grating around its normal. Introducing photopolymer holographic gratings in ESPSI gives the advantage of using high …

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Women, Engineering And Research: Providing Choice And Balance, Cecilia Chan, Mike Murphy Jan 2006

Women, Engineering And Research: Providing Choice And Balance, Cecilia Chan, Mike Murphy

Conference papers

“Research cannot reach its full potential when half the population is excluded from its activities”1. Women researchers in engineering remain a minority in both Higher Education and industry in Ireland. Recent statistics of women graduating in science and engineering indicated an increase (a slow increase) but the numbers moving through to completion of PhD and careers in academia or industry remain quite low. Statistics on women in professorial and senior positions within the engineering sector also remains low. The educated workforce produced in Ireland by its education system is acknowledged as a key factor in attracting international investment to the …

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Understanding The European Bologna Process, Michael Dyrenfurth, Mike Murphy Jan 2006

Understanding The European Bologna Process, Michael Dyrenfurth, Mike Murphy

Conference papers

This paper describes the European Bologna process, provides a ‘mid-term’ review of its implementation status and discusses its possible positive and negative impacts on US – European links in the fields of engineering and technology education. The first section of this paper describes the meaning and rationale behind each of the Bologna objectives, and why there is a need to establish a European area of higher education. It also comments on how these objectives are interpreted within educational institutions. The second section provides a mid-term report on the implementation status within European universities, focussed primarily on engineering and technology education. …

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Experimental Investigation Of The Velocity Field In Buoyant Diffusion Flames Using Piv And Tpiv Algorithm, Lulu Sun, Xiangyang Zhou, Shankar Mahalingam, David R. Weise Jan 2006

Experimental Investigation Of The Velocity Field In Buoyant Diffusion Flames Using Piv And Tpiv Algorithm, Lulu Sun, Xiangyang Zhou, Shankar Mahalingam, David R. Weise

Publications

We investigated a simultaneous temporally and spatially resolved 2-D velocity field above a burning circular pan of alcohol using particle image velocimetry (PIV). The results obtained from PIV were used to assess a thermal particle image velocimetry (TPIV) algorithm previously developed to approximate the velocity field using the temperature field, simultaneously captured by an infrared (IR) thermal camera. By tracing “thermal particles,” which were assumed to be virtual particles that corresponded to pixels of temperature values in successive IR images, the TPIV algorithm estimated a larger scale instantaneous velocity field than either a single-point velocity measurement (e.g., LDV) or the …

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Towards An Inverse Constant Q Transform, Derry Fitzgerald, Matt Cranitch, Marcin T. Cychowski Jan 2006

Towards An Inverse Constant Q Transform, Derry Fitzgerald, Matt Cranitch, Marcin T. Cychowski

Conference papers

The Constant Q transform has found use in the analysis of musical signals due to its logarithmic frequency resolution. Unfortunately, a considerable drawback of the Constant Q Transform is that there is no inverse transform. Here we show it is possible to obtain a good quality approximate inverse to the Constant Q transform provided that the signal to be inverted has a sparse representation in the Discrete Fourier transform domain. This inverse is obtained through the use of lo and l1 minimisation approaches to project the signal from the constant Q domain back to the Discrete Fourier Transform domain. Once …

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A Comparison Of Time-Domain Time-Scale Modification Algorithms, David Dorran, Robert Lawlor, Eugene Coyle Jan 2006

A Comparison Of Time-Domain Time-Scale Modification Algorithms, David Dorran, Robert Lawlor, Eugene Coyle

Conference papers

Time-domain appraoches to time-scale modification are popular due to their ability to produce high quality results at a relatively low computational cost. Within the category of time-domain implementations quite a number of alternatives exist, each with their own computational requirements and associated output quality. This paper provides a computational and objective output quality assessment of a number of popular time-domain time-scaling implmentations; thus providing a means for developers to identify a suitable algorithm for their application of interest. In addition, the issues that should be considered in developing time-domain algorithms are outlines, purely in the context of a waveform editing …

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Summer 2005, 90.9 Wmpg Fm Jul 2005

Summer 2005, 90.9 Wmpg Fm

WMPG Program Guides

Summer 2005

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Inside Unlv, Erin O'Donnell, Diane Russell, Carol C. Harter May 2005

Inside Unlv, Erin O'Donnell, Diane Russell, Carol C. Harter

Inside UNLV

No abstract provided.

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Information Technology Implementation And Sustainment Model: Data Collection Instrument, Walter K. Yazzie Mar 2005

Information Technology Implementation And Sustainment Model: Data Collection Instrument, Walter K. Yazzie

Theses and Dissertations

The goal of this research was to develop a data collection instrument for an existing information technology implementation and sustainment model. In 2003, a unique system dynamics model was developed at the Air Force Institute of Technology to predict the behavior of information technology implementation and sustainment (Fonnesbeck, 2003). However, no empirical data was used during the model development. In order to collect the needed empirical data, this research develops a data collection instrument for the model. The instrument was sent to 60 Air Force community planners who are currently implementing a geographical information system (Air Force GeoBase) into their …

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Numerical Simulation Of Live Chaparral Fire Behavior Using Firetec, Lulu Sun, Xiangyang Zhou, Shankar Mahalingam, Jesse Canfield, Rodman Linn Mar 2005

Numerical Simulation Of Live Chaparral Fire Behavior Using Firetec, Lulu Sun, Xiangyang Zhou, Shankar Mahalingam, Jesse Canfield, Rodman Linn

Publications

Fire spread through chaparral fuels is a significant feature of wildland fire in southern California. In order to study the detailed physical processes involved during fire spread, FIRETEC, a coupled atmosphere/wildfire behavior model was refined to examine chaparral fire behavior. FIRETEC combines a sophisticated fine-scale model to simulate a three- dimensional wildfire, moving over a terrain-following finite volume grid, with the motions of the local atmosphere. It accounts for the microscopic details of a fire with macroscopic resolution by dividing quantities into mean and fluctuating parts and the resulting transport equations are solved by using a finite difference method. In …

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Composting For Organic Agriculture, Mona Mohamed Hamdy Mostafa Sayed Ahmed Feb 2005

Composting For Organic Agriculture, Mona Mohamed Hamdy Mostafa Sayed Ahmed

Archived Theses and Dissertations

No abstract provided.

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Advantageous Goes Ir Results For Ash Mapping At High Latitudes: Cleveland Eruptions 2001, Yingxin Gu, William I. Rose, David J. Schneider, Gregg J. S. Bluth, M. I. Watson Jan 2005

Advantageous Goes Ir Results For Ash Mapping At High Latitudes: Cleveland Eruptions 2001, Yingxin Gu, William I. Rose, David J. Schneider, Gregg J. S. Bluth, M. I. Watson

Department of Geological and Mining Engineering and Sciences Publications

The February 2001 eruption of Cleveland Volcano, Alaska allowed for comparisons of volcanic ash detection using two-band thermal infrared (10–12 μm) remote sensing from MODIS, AVHRR, and GOES 10. Results show that high latitude GOES volcanic cloud sensing the range of about 50 to 65°N is significantly enhanced. For the Cleveland volcanic clouds the MODIS and AVHRR data have zenith angles 6–65 degrees and the GOES has zenith angles that are around 70 degrees. The enhancements are explained by distortion in the satellite view of the cloud's lateral extent because the satellite zenith angles result in a “side-looking” aspect and …

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Spring 2005, 90.9 Wmpg Fm Jan 2005

Spring 2005, 90.9 Wmpg Fm

WMPG Program Guides

Newspaper format.

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Fall/Winter 2005, 90.9 Wmpg Fm Jan 2005

Fall/Winter 2005, 90.9 Wmpg Fm

WMPG Program Guides

Newspaper format

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Onset Detection Using Comb Filters, Mikel Gainza, Bob Lawlor, Eugene Coyle Jan 2005

Onset Detection Using Comb Filters, Mikel Gainza, Bob Lawlor, Eugene Coyle

Conference papers

A technique for detecting note onsets using FIR comb filters which have different filter delays is presented. The proposed onset detector focuses on the inharmonic characteristics of the onset component and the energy increases of the signal. Both properties are combined by utilising FIR comb filters on a frame by frame basis in order to obtain an onset detection functions, which is suitable for detecting slow onsets. The proposed approach improves upon existing methods in terms of the percentage of correct detections in signal processing.

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Comparison Of Signal Reconstruction Methods For The Azimuth Discrimination And Resynthesis Algorithm, Dan Barry, Robert Lawlor, Eugene Coyle Jan 2005

Comparison Of Signal Reconstruction Methods For The Azimuth Discrimination And Resynthesis Algorithm, Dan Barry, Robert Lawlor, Eugene Coyle

Conference papers

The Azimuth Discrimination and Resynthesis algorithm (ADRess) has been shown to produce high quality sound source separation results for intensity panned stereo recordings. There are however, artifacts such as phasiness which become apparent in the separated signals under certain conditions. This is largely due to the fact that only the magnitude spectra for the separated sources are estimated. Each source is then resynthesised using the phase information obtained from the original mixture. This paper describes the nature and origin of the associated artifacts and proposes alternative techniques for resynthesising the separated signals. A comparison of each technque is then presented.

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Development Of A Computer-Based Violin Teaching Aid: Vitool, Jane Charles, Derry Fitzgerald, Eugene Coyle Jan 2005

Development Of A Computer-Based Violin Teaching Aid: Vitool, Jane Charles, Derry Fitzgerald, Eugene Coyle

Conference papers

This paper considers the development of a violin teaching aid, called ViTool, which is based on violin pedagogy, sound analysis, and comparison of beginner and good player recordings. It is a computer based teaching aid and will ultimately consist of at least four task dependent tools. Typical beginner faults have been identified and features, that best describe them for classification purposes, are considered. The ViTool is not intended as a replacement or electronic teacher, but as a teaching aid. Presently, it seems that no such violin learning aid or tool exists and an opportunity exists for the development of such …

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Mechanical Damping System For Structures, Jay A. Puckett, Patrick S. Mcmanus, Homer R. Hamilton Iii Jan 2005

Mechanical Damping System For Structures, Jay A. Puckett, Patrick S. Mcmanus, Homer R. Hamilton Iii

Durham School of Architectural Engineering and Construction: Faculty Publications

A mechanical damping system for a structure is provided. The mechanical damping system comprises a tubular impact frame secured to the structure. A support frame is secured to the structure with the support frame spaced from the impact frame. An elongated member is provided having a first end and a second end. The first end is secured within the support frame and the second end is free from connection and extends into the impact frame. At least one impact mass is secured to the second end of the elongated member, the impact mass movable within and contactable with the impact …

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