subject:(Engineering General )

1. Boesenberg-Smith, Kelly. A comparison of the AAVLD and ISO 17025 standards| What must a veterinary diagnostic laboratory do to achieve ISO 17025?.

Degree: 2014, California State University, Dominguez Hills

URL: http://pqdtopen.proquest.com/#viewpdf?dispub=1524790

► Publically-administered veterinary diagnostic laboratories are accredited to an industry-developed quality standard, AAVLD, which is similar to the ISO 17025 international standard. Laboratories wanting to… (more)

Subjects/Keywords: Engineering; General

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Boesenberg-Smith, K. (2014). A comparison of the AAVLD and ISO 17025 standards| What must a veterinary diagnostic laboratory do to achieve ISO 17025?. (Thesis). California State University, Dominguez Hills. Retrieved from http://pqdtopen.proquest.com/#viewpdf?dispub=1524790

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Boesenberg-Smith, Kelly. “A comparison of the AAVLD and ISO 17025 standards| What must a veterinary diagnostic laboratory do to achieve ISO 17025?.” 2014. Thesis, California State University, Dominguez Hills. Accessed March 01, 2021. http://pqdtopen.proquest.com/#viewpdf?dispub=1524790.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Boesenberg-Smith, Kelly. “A comparison of the AAVLD and ISO 17025 standards| What must a veterinary diagnostic laboratory do to achieve ISO 17025?.” 2014. Web. 01 Mar 2021.

Vancouver:

Boesenberg-Smith K. A comparison of the AAVLD and ISO 17025 standards| What must a veterinary diagnostic laboratory do to achieve ISO 17025?. [Internet] [Thesis]. California State University, Dominguez Hills; 2014. [cited 2021 Mar 01]. Available from: http://pqdtopen.proquest.com/#viewpdf?dispub=1524790.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Boesenberg-Smith K. A comparison of the AAVLD and ISO 17025 standards| What must a veterinary diagnostic laboratory do to achieve ISO 17025?. [Thesis]. California State University, Dominguez Hills; 2014. Available from: http://pqdtopen.proquest.com/#viewpdf?dispub=1524790

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

2. Padrono, Blanca. Changing paradigms for batch record review in pharmaceuticals to drive real time product disposition.

Degree: 2014, California State University, Dominguez Hills

URL: http://pqdtopen.proquest.com/#viewpdf?dispub=1525507

► The review of batch records required to release products to customers on time presents a challenge for the majority of pharmaceutical companies. A slow… (more)

Subjects/Keywords: Engineering; General

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APA (6^th Edition):

Padrono, B. (2014). Changing paradigms for batch record review in pharmaceuticals to drive real time product disposition. (Thesis). California State University, Dominguez Hills. Retrieved from http://pqdtopen.proquest.com/#viewpdf?dispub=1525507

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Padrono, Blanca. “Changing paradigms for batch record review in pharmaceuticals to drive real time product disposition.” 2014. Thesis, California State University, Dominguez Hills. Accessed March 01, 2021. http://pqdtopen.proquest.com/#viewpdf?dispub=1525507.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Padrono, Blanca. “Changing paradigms for batch record review in pharmaceuticals to drive real time product disposition.” 2014. Web. 01 Mar 2021.

Vancouver:

Padrono B. Changing paradigms for batch record review in pharmaceuticals to drive real time product disposition. [Internet] [Thesis]. California State University, Dominguez Hills; 2014. [cited 2021 Mar 01]. Available from: http://pqdtopen.proquest.com/#viewpdf?dispub=1525507.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Padrono B. Changing paradigms for batch record review in pharmaceuticals to drive real time product disposition. [Thesis]. California State University, Dominguez Hills; 2014. Available from: http://pqdtopen.proquest.com/#viewpdf?dispub=1525507

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Bournemouth University

3. Torres Perez, Angel. Tribological assessment of oil condition sensors for marine launching equipment.

Degree: phd, School of Design, Engineering & Computing, 2011, Bournemouth University

URL: http://eprints.bournemouth.ac.uk/18993/

► Problems in hydraulic systems associated with hydraulic fluids are an important area of research. Time has proven that contamination control in hydraulic and lubricating systems… (more)

▼ Problems in hydraulic systems associated with hydraulic fluids are an important area of research. Time has proven that contamination control in hydraulic and lubricating systems are fundamental to reliability and performance. Contamination control is needed to guarantee the quality of the oil and machine reliability. Among the several condition monitoring techniques, oil and wear analysis are the most effective for contamination control in hydraulic equipment. An emerging maintenance philosophy is oil condition based maintenance, in which the active monitoring of oil parameters determines the machine health and the variable service intervals. This new maintenance philosophy requires sensor technology able to provide real time indicators of the status of the system.Nowadays, oil condition monitoring sensors are not a mature technology and their performance has not been widely assessed under controlled experimental conditions. This research explains the physical fundamentals of commercially available sensors and it discusses and evaluates their effectiveness under controlled experimental conditions.Tribology tests were performed for sliding contacts as they are the most predominant type of contacts within hydraulic systems. Results reveal that several characteristics of the sensors must be improved for a more meaningful output and for an earlier detection of abnormal trends which are typical indicators of the onset of faults.Finally, of all the future trends of oil condition monitoring sensors, the novel methodology to calculate the particle size distribution from ferrous debris density measurements is the most useful and important contribution to knowledge of this research. The proposed method when compared to current technology would bring a new type of particle counter that could break the technological size limitation of particle counters based on magnetometry (the most extended type in industrial and military machinery), leading to earlier fault detection. Improvements of this methodology would allow further development of low cost particle counters in the micrometer and submicrometer range which can be widely applied in many industrial processes and scientific disciplines.

Subjects/Keywords: General Engineering

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Torres Perez, A. (2011). Tribological assessment of oil condition sensors for marine launching equipment. (Doctoral Dissertation). Bournemouth University. Retrieved from http://eprints.bournemouth.ac.uk/18993/

Chicago Manual of Style (16^th Edition):

Torres Perez, Angel. “Tribological assessment of oil condition sensors for marine launching equipment.” 2011. Doctoral Dissertation, Bournemouth University. Accessed March 01, 2021. http://eprints.bournemouth.ac.uk/18993/.

MLA Handbook (7^th Edition):

Torres Perez, Angel. “Tribological assessment of oil condition sensors for marine launching equipment.” 2011. Web. 01 Mar 2021.

Vancouver:

Torres Perez A. Tribological assessment of oil condition sensors for marine launching equipment. [Internet] [Doctoral dissertation]. Bournemouth University; 2011. [cited 2021 Mar 01]. Available from: http://eprints.bournemouth.ac.uk/18993/.

Council of Science Editors:

Torres Perez A. Tribological assessment of oil condition sensors for marine launching equipment. [Doctoral Dissertation]. Bournemouth University; 2011. Available from: http://eprints.bournemouth.ac.uk/18993/

Bournemouth University

4. Torres Perez, Angel. Tribological assessment of oil condition sensors for marine launching equipment.

Degree: PhD, 2011, Bournemouth University

URL: http://eprints.bournemouth.ac.uk/18993/ ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.544544

► Problems in hydraulic systems associated with hydraulic fluids are an important area of research. Time has proven that contamination control in hydraulic and lubricating systems… (more)

▼ Problems in hydraulic systems associated with hydraulic fluids are an important area of research. Time has proven that contamination control in hydraulic and lubricating systems are fundamental to reliability and performance. Contamination control is needed to guarantee the quality of the oil and machine reliability. Among the several condition monitoring techniques, oil and wear analysis are the most effective for contamination control in hydraulic equipment. An emerging maintenance philosophy is oil condition based maintenance, in which the active monitoring of oil parameters determines the machine health and the variable service intervals. This new maintenance philosophy requires sensor technology able to provide real time indicators of the status of the system.Nowadays, oil condition monitoring sensors are not a mature technology and their performance has not been widely assessed under controlled experimental conditions. This research explains the physical fundamentals of commercially available sensors and it discusses and evaluates their effectiveness under controlled experimental conditions.Tribology tests were performed for sliding contacts as they are the most predominant type of contacts within hydraulic systems. Results reveal that several characteristics of the sensors must be improved for a more meaningful output and for an earlier detection of abnormal trends which are typical indicators of the onset of faults.Finally, of all the future trends of oil condition monitoring sensors, the novel methodology to calculate the particle size distribution from ferrous debris density measurements is the most useful and important contribution to knowledge of this research. The proposed method when compared to current technology would bring a new type of particle counter that could break the technological size limitation of particle counters based on magnetometry (the most extended type in industrial and military machinery), leading to earlier fault detection. Improvements of this methodology would allow further development of low cost particle counters in the micrometer and submicrometer range which can be widely applied in many industrial processes and scientific disciplines.

Subjects/Keywords: General Engineering

Record Details Similar Records Cite « Share

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Torres Perez, A. (2011). Tribological assessment of oil condition sensors for marine launching equipment. (Doctoral Dissertation). Bournemouth University. Retrieved from http://eprints.bournemouth.ac.uk/18993/ ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.544544

Chicago Manual of Style (16^th Edition):

Torres Perez, Angel. “Tribological assessment of oil condition sensors for marine launching equipment.” 2011. Doctoral Dissertation, Bournemouth University. Accessed March 01, 2021. http://eprints.bournemouth.ac.uk/18993/ ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.544544.

MLA Handbook (7^th Edition):

Torres Perez, Angel. “Tribological assessment of oil condition sensors for marine launching equipment.” 2011. Web. 01 Mar 2021.

Vancouver:

Torres Perez A. Tribological assessment of oil condition sensors for marine launching equipment. [Internet] [Doctoral dissertation]. Bournemouth University; 2011. [cited 2021 Mar 01]. Available from: http://eprints.bournemouth.ac.uk/18993/ ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.544544.

Council of Science Editors:

Torres Perez A. Tribological assessment of oil condition sensors for marine launching equipment. [Doctoral Dissertation]. Bournemouth University; 2011. Available from: http://eprints.bournemouth.ac.uk/18993/ ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.544544

University of Oklahoma

5. Mosier, Rachel. QUANTIFYING COSTS AND BENEFITS OF SUSTAINABLE PROJECTS IN THE CITY OF OKLAHOMA CITY.

Degree: PhD, 2013, University of Oklahoma

URL: http://hdl.handle.net/11244/7892

► Advocates of sustainable design and construction have asserted for years that sustainability can be designed and built without additional expense, however this premise has not… (more)

▼ Advocates of sustainable design and construction have asserted for years that sustainability can be designed and built without additional expense, however this premise has not been proven. For public projects, potential accrued savings does not offset budget shortfalls. Design and construction capital costs must be estimated and obtained in an amount sufficient to deliver the entire project, as the funding is often determined years in advance of the project and cannot be changed due to future savings. Metrics for determining sustainability and the associated costs is provided. A review of the known sustainability benchmarks was performed. For comparison of benchmarks to costs, the percent of sustainability goals that have a cost component have been identified. For each of the five benchmarks approximately half of the credits affect the construction cost. The research performs both qualitative and quantitative analyses. A Qualitative Comparative Analysis is performed for the case studies. A database was created from the case study projects. Initial costs are used to provide values for sustainable goals. Quantitative analyses included Net Present Value (NPV), Decision Theory, Analytical Hierarchical Process, Cost Basis and Life Cycle Cost Analysis. Net present value is used to determine pavement preservation type. A carbon footprint cost index illustrates the cost and provides a tangible metric for sustainability. Carbon footprints have been calculated where needed. Frameworks are established as a tool to quantify the cost of sustainability integration in municipal streetscape projects. Decision making tools are provided that allow owners to adjust scope and sustainability while remaining in budget. Using a cost index for comparison will provide the owner with an easily identifiable difference in the NPV and carbon footprints. This information aids the decision to add sustainable pavement preservation into projects. Since pavement preservation can provide additional life, the additional costs need to be weighed against the benefits. The required features of work are segregated from the proposed preservation options. This allows owners to identify costs of sustainable options to justify additional funding. Advisors/Committee Members: Ramseyer, Christopher (advisor), Gransberg, Douglas (advisor), McCuen, Tamera (committee member), Zaman, Musharraf (committee member), Volz, Jeffrey (committee member).

Subjects/Keywords: Engineering; General.

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Mosier, R. (2013). QUANTIFYING COSTS AND BENEFITS OF SUSTAINABLE PROJECTS IN THE CITY OF OKLAHOMA CITY. (Doctoral Dissertation). University of Oklahoma. Retrieved from http://hdl.handle.net/11244/7892

Chicago Manual of Style (16^th Edition):

Mosier, Rachel. “QUANTIFYING COSTS AND BENEFITS OF SUSTAINABLE PROJECTS IN THE CITY OF OKLAHOMA CITY.” 2013. Doctoral Dissertation, University of Oklahoma. Accessed March 01, 2021. http://hdl.handle.net/11244/7892.

MLA Handbook (7^th Edition):

Mosier, Rachel. “QUANTIFYING COSTS AND BENEFITS OF SUSTAINABLE PROJECTS IN THE CITY OF OKLAHOMA CITY.” 2013. Web. 01 Mar 2021.

Vancouver:

Mosier R. QUANTIFYING COSTS AND BENEFITS OF SUSTAINABLE PROJECTS IN THE CITY OF OKLAHOMA CITY. [Internet] [Doctoral dissertation]. University of Oklahoma; 2013. [cited 2021 Mar 01]. Available from: http://hdl.handle.net/11244/7892.

Council of Science Editors:

Mosier R. QUANTIFYING COSTS AND BENEFITS OF SUSTAINABLE PROJECTS IN THE CITY OF OKLAHOMA CITY. [Doctoral Dissertation]. University of Oklahoma; 2013. Available from: http://hdl.handle.net/11244/7892

University of Oklahoma

6. Yu, Guangzhe. SURFACTANTS DERIVED FROM 2-HYDROXY-4-(METHYLTHIO)BUTYRIC ACID: PHASE BEHAVIOR, INTERFACIAL ACTIVITY, MICROEMULSIONS AND MORE.

Degree: PhD, 2013, University of Oklahoma

URL: http://hdl.handle.net/11244/7690

► Surfactants derived from 2-hydroxy-4-(methylthio) butyric acid were investigated. Anionic surfactants derived from this molecule have excellent water solubility, hardness tolerance and surface activity. Nonionic surfactants… (more)

Subjects/Keywords: Engineering; General.

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Yu, G. (2013). SURFACTANTS DERIVED FROM 2-HYDROXY-4-(METHYLTHIO)BUTYRIC ACID: PHASE BEHAVIOR, INTERFACIAL ACTIVITY, MICROEMULSIONS AND MORE. (Doctoral Dissertation). University of Oklahoma. Retrieved from http://hdl.handle.net/11244/7690

Chicago Manual of Style (16^th Edition):

Yu, Guangzhe. “SURFACTANTS DERIVED FROM 2-HYDROXY-4-(METHYLTHIO)BUTYRIC ACID: PHASE BEHAVIOR, INTERFACIAL ACTIVITY, MICROEMULSIONS AND MORE.” 2013. Doctoral Dissertation, University of Oklahoma. Accessed March 01, 2021. http://hdl.handle.net/11244/7690.

MLA Handbook (7^th Edition):

Yu, Guangzhe. “SURFACTANTS DERIVED FROM 2-HYDROXY-4-(METHYLTHIO)BUTYRIC ACID: PHASE BEHAVIOR, INTERFACIAL ACTIVITY, MICROEMULSIONS AND MORE.” 2013. Web. 01 Mar 2021.

Vancouver:

Yu G. SURFACTANTS DERIVED FROM 2-HYDROXY-4-(METHYLTHIO)BUTYRIC ACID: PHASE BEHAVIOR, INTERFACIAL ACTIVITY, MICROEMULSIONS AND MORE. [Internet] [Doctoral dissertation]. University of Oklahoma; 2013. [cited 2021 Mar 01]. Available from: http://hdl.handle.net/11244/7690.

Council of Science Editors:

Yu G. SURFACTANTS DERIVED FROM 2-HYDROXY-4-(METHYLTHIO)BUTYRIC ACID: PHASE BEHAVIOR, INTERFACIAL ACTIVITY, MICROEMULSIONS AND MORE. [Doctoral Dissertation]. University of Oklahoma; 2013. Available from: http://hdl.handle.net/11244/7690

University of Oklahoma

7. Pendergraft, Rick. A New Adaptive Integrity Monitor For the Local Area Augmentation System Utilizing Closed Loop Feed Back.

Degree: PhD, 2013, University of Oklahoma

URL: http://hdl.handle.net/11244/7908

► This dissertation presents a new set of algorithms and architecture for implementation of a real-time adaptive integrity monitor for a Local Area Augmentation System (LAAS)… (more)

Subjects/Keywords: Engineering; General.

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APA (6^th Edition):

Pendergraft, R. (2013). A New Adaptive Integrity Monitor For the Local Area Augmentation System Utilizing Closed Loop Feed Back. (Doctoral Dissertation). University of Oklahoma. Retrieved from http://hdl.handle.net/11244/7908

Chicago Manual of Style (16^th Edition):

Pendergraft, Rick. “A New Adaptive Integrity Monitor For the Local Area Augmentation System Utilizing Closed Loop Feed Back.” 2013. Doctoral Dissertation, University of Oklahoma. Accessed March 01, 2021. http://hdl.handle.net/11244/7908.

MLA Handbook (7^th Edition):

Pendergraft, Rick. “A New Adaptive Integrity Monitor For the Local Area Augmentation System Utilizing Closed Loop Feed Back.” 2013. Web. 01 Mar 2021.

Vancouver:

Pendergraft R. A New Adaptive Integrity Monitor For the Local Area Augmentation System Utilizing Closed Loop Feed Back. [Internet] [Doctoral dissertation]. University of Oklahoma; 2013. [cited 2021 Mar 01]. Available from: http://hdl.handle.net/11244/7908.

Council of Science Editors:

Pendergraft R. A New Adaptive Integrity Monitor For the Local Area Augmentation System Utilizing Closed Loop Feed Back. [Doctoral Dissertation]. University of Oklahoma; 2013. Available from: http://hdl.handle.net/11244/7908

University of Central Lancashire

8. Guo, YunBo. Polyp segmentation in colonoscopy images with convolutional neural networks.

Degree: PhD, 2019, University of Central Lancashire

URL: http://clok.uclan.ac.uk/34656/ ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.815427

► The thesis looks at approaches to segmentation of polyps in colonoscopy images. The aim was to investigate and develop methods that are robust, accurate and… (more)

▼ The thesis looks at approaches to segmentation of polyps in colonoscopy images. The aim was to investigate and develop methods that are robust, accurate and computationally efficient and which can compete with the current state-of-the-art in polyp segmentation. Colorectal cancer is one of the leading cause of cancer deaths worldwide. To decrease mortality, an assessment of polyp malignancy is performed during colonoscopy examination so polyps can be removed at an early stage. In current routine clinical practice, polyps are detected and delineated manually in colonoscopy images by highly trained clinicians. To automate these processes, machine learning and computer vision techniques have been utilised. They have been shown to improve polyp detectability and segmentation objectivity. However, polyp segmentation is a very challenging task due to inherent variability of polyp morphology and colonoscopy image appearance. This research considers a range of approaches to polyp segmentation – seeking out those that offer a best compromise between accuracy and computational complexity. Based on analysis of existing machine learning and polyp image segmentation techniques, a novel hybrid deep learning segmentation method is proposed to alleviate the impact of the above stated challenges on polyp segmentation. The method consists of two fully convolutional networks. The first proposed network is based on a compact architecture with large receptive fields and multiple classification paths. The method performs well on most images, accurately segmenting polyps of diverse morphology and appearance. However, this network is prone to misdetection of very small polyps. To solve this problem, a second network is proposed, which primarily aims to improve sensitivity to small polyp details by emphasising low-level image features. In order to fully utilise information contained in the available training dataset, comprehensive data augmentation techniques are adopted. To further improve the performance of the proposed segmentation methods, test-time data augmentation is also implemented. A comprehensive multi-criterion analysis of the proposed methods is provided. The result demonstrates that the new methodology has better accuracy and robustness than the current state-of-the-art, as proven by the outstanding performance at the 2017 and 2018 GIANA polyp segmentation challenges.

Subjects/Keywords: General engineering

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Guo, Y. (2019). Polyp segmentation in colonoscopy images with convolutional neural networks. (Doctoral Dissertation). University of Central Lancashire. Retrieved from http://clok.uclan.ac.uk/34656/ ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.815427

Chicago Manual of Style (16^th Edition):

Guo, YunBo. “Polyp segmentation in colonoscopy images with convolutional neural networks.” 2019. Doctoral Dissertation, University of Central Lancashire. Accessed March 01, 2021. http://clok.uclan.ac.uk/34656/ ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.815427.

MLA Handbook (7^th Edition):

Guo, YunBo. “Polyp segmentation in colonoscopy images with convolutional neural networks.” 2019. Web. 01 Mar 2021.

Vancouver:

Guo Y. Polyp segmentation in colonoscopy images with convolutional neural networks. [Internet] [Doctoral dissertation]. University of Central Lancashire; 2019. [cited 2021 Mar 01]. Available from: http://clok.uclan.ac.uk/34656/ ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.815427.

Council of Science Editors:

Guo Y. Polyp segmentation in colonoscopy images with convolutional neural networks. [Doctoral Dissertation]. University of Central Lancashire; 2019. Available from: http://clok.uclan.ac.uk/34656/ ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.815427

The University of Arizona

9. Stroud, Matthew. Solar desalination in the southwest United States| A thermoeconomic analysis utilizing the sun to desalt water in high irradiance regions.

Degree: 2012, The University of Arizona

URL: http://pqdtopen.proquest.com/#viewpdf?dispub=1513398

► Water scarcity and high irradiance overlap in the southwestern United States. This thesis explores solar energy as a method to power desalination in the… (more)

Subjects/Keywords: Hydrology; Economics, General; Engineering, General

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APA (6^th Edition):

Stroud, M. (2012). Solar desalination in the southwest United States| A thermoeconomic analysis utilizing the sun to desalt water in high irradiance regions. (Thesis). The University of Arizona. Retrieved from http://pqdtopen.proquest.com/#viewpdf?dispub=1513398

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Stroud, Matthew. “Solar desalination in the southwest United States| A thermoeconomic analysis utilizing the sun to desalt water in high irradiance regions.” 2012. Thesis, The University of Arizona. Accessed March 01, 2021. http://pqdtopen.proquest.com/#viewpdf?dispub=1513398.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Stroud, Matthew. “Solar desalination in the southwest United States| A thermoeconomic analysis utilizing the sun to desalt water in high irradiance regions.” 2012. Web. 01 Mar 2021.

Vancouver:

Stroud M. Solar desalination in the southwest United States| A thermoeconomic analysis utilizing the sun to desalt water in high irradiance regions. [Internet] [Thesis]. The University of Arizona; 2012. [cited 2021 Mar 01]. Available from: http://pqdtopen.proquest.com/#viewpdf?dispub=1513398.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Stroud M. Solar desalination in the southwest United States| A thermoeconomic analysis utilizing the sun to desalt water in high irradiance regions. [Thesis]. The University of Arizona; 2012. Available from: http://pqdtopen.proquest.com/#viewpdf?dispub=1513398

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

10. Lyons, John Lambert. First-principles investigations of conductivity control in wide-band-gap semiconductors.

Degree: 2013, University of California, Santa Barbara

URL: http://pqdtopen.proquest.com/#viewpdf?dispub=3553757

► The wide-band-gap semiconductors GaN, AlN, and ZnO have properties that make them attractive candidates for fabricating light-emitting diodes, laser diodes, transistors and solar cells.… (more)

▼ The wide-band-gap semiconductors GaN, AlN, and ZnO have properties that make them attractive candidates for fabricating light-emitting diodes, laser diodes, transistors and solar cells. With band gaps in the visible and ultraviolet, these materials and their alloys can emit and absorb in important regions of the electromagnetic spectrum. Despite the promise of these wide-band-gap semiconductors, their electronic conductivity cannot be completely controlled. In this work, we investigate the lack of conductivity control in these materials using first-principles calculations. We first focus on sources of unintentional n-type conductivity. The sources of such conductivity have long remained unknown, and high concentrations of donors make it more difficult to achieve full control of the conductivity of wide-band-gap semiconductors. We have found that silicon, a common impurity in ZnO, acts as a shallow donor and likely contributes to background n-type conductivity. Another shortcoming of these materials is that they are difficult, and sometimes impossible, to dope p type. This is a major barrier, since optoelectronic devices require both p-type and n-type material. Group-V impurities, which substitute on the anion site, are commonly thought to be attractive p-type dopants, especially for ZnO. We find these acceptors lead to highly localized, atomic-like states, making them ineffective dopants. Nitrogen, often touted as a promising acceptor in ZnO, is instead found to be an exceedingly deep acceptor that cannot lead to p-type conductivity. Carbon, a common impurity in the nitride semiconductors, exhibits similar behavior. We calculate characteristic optical signals for these acceptors, allowing for experimental verification of our predictions. Finally, we investigate how defect-trapped holes can limit the effectiveness of cation-site acceptors. We find that Mg, the only p-type dopant for GaN, features a localized hole despite being an effective acceptor. In AlN, Mg is also highly localized, hampering hole conductivity in this material. In ZnO, Group-I acceptors such as Li, also trap holes, making them inefficient dopants, and limiting the prospects for achieving p-type ZnO. Overall, we find that our results can explain the difficulties in improving the doping efficiency of Mg-doped GaN, and why alternative dopants are not effective. Our results indicate that substitutional acceptors in ZnO are deep defects, and demonstrate why p-type doping of ZnO is currently impossible.

Subjects/Keywords: Engineering, General; Physics, General; Engineering, Materials Science

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Lyons, J. L. (2013). First-principles investigations of conductivity control in wide-band-gap semiconductors. (Thesis). University of California, Santa Barbara. Retrieved from http://pqdtopen.proquest.com/#viewpdf?dispub=3553757

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Lyons, John Lambert. “First-principles investigations of conductivity control in wide-band-gap semiconductors.” 2013. Thesis, University of California, Santa Barbara. Accessed March 01, 2021. http://pqdtopen.proquest.com/#viewpdf?dispub=3553757.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Lyons, John Lambert. “First-principles investigations of conductivity control in wide-band-gap semiconductors.” 2013. Web. 01 Mar 2021.

Vancouver:

Lyons JL. First-principles investigations of conductivity control in wide-band-gap semiconductors. [Internet] [Thesis]. University of California, Santa Barbara; 2013. [cited 2021 Mar 01]. Available from: http://pqdtopen.proquest.com/#viewpdf?dispub=3553757.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Lyons JL. First-principles investigations of conductivity control in wide-band-gap semiconductors. [Thesis]. University of California, Santa Barbara; 2013. Available from: http://pqdtopen.proquest.com/#viewpdf?dispub=3553757

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Huddersfield

11. Muhamedsalih, Hussam. Investigation of Wavelength Scanning Interferometry for Embedded Metrology.

Degree: 2013, University of Huddersfield

URL: http://eprints.hud.ac.uk/id/eprint/18090/1/Hussam_Muhamedsalih_-_Final_Thesis.pdf

► The tremendous growth in the manufacture of a wide range of deterministic and complex free form surfaces, has made surface metrology an essential part of… (more)

▼ The tremendous growth in the manufacture of a wide range of deterministic and complex free form surfaces, has made surface metrology an essential part of the manufacturing process. The mass production of these surfaces at the micro and nano-scales is stimulating the development of new metrology instrumentation. Current instrumentation still suffers from one fundamental limitation, namely the inability to perform embedded (on-line) measurement in the manufacturing environment. The capability to measure surfaces on-line can improve yields through better process control, thus reducing costs and enabling the commercialisation of more hi-tech products. Better embedded metrology can also enable the manufacture of next generation surfaces with high precisions and more complex artefacts. Embedded measurement requires the development of precise on-line measurement instruments capable of a large measurement range with immunity from environmental vibrational disturbance. This thesis introduces a new optical interferometry system for fast areal surface measurement at the micro and nano-scales which is robust against the effects of vibration. Wavelength Scanning Interferometry (WSI) together with an acousto-optic tuneable filtering technique has been developed which can measure surfaces with large step heights. The illumination source of the WSI tunes the wavelength provided from a broadband light (halogen-tungsten lamp) over a 93 nm range with a linewidth of approximately 2 nm. This light source is combined with a Linnik interferometer to generate an apparatus that can measure large discontinuous step heights absolutely and without any 2π phase ambiguity and with nano scale resolution. A reference interferometer which acts as a position feedback sensor is multiplexed with the WSI in order to stabilise the system against environmental disturbances. The reference interferometer is integrated with an active closed loop control system to track the optical path length mechanically using a piezoelectric translator. The stabilised WSI can effectively perform surface measurements under conditions of vibration that would make measurement impossible for an unstabilised interferometer. High speed measurement is of high importance for embedded metrology instrumentation as this has a direct effect on manufacturing throughput. In order to increase the speed of measurement calculation, this thesis presents a parallel programming model using large numbers of threads processed by many cores of a graphic processing unit (GPU). This model can accelerate the computing time up to 27 times compared to a conventional single threaded CPU calculation. This parallel programming model is based on CUDATM (Compute Unified Device Architecture) program structure developed by NVIDIA and harnesses the cheap computing power of commercial graphics cards. The system design, implementation, operation, fringe analysis algorithms and parallel programming model are all reported in this thesis. The results of measurements for standard step height…

Subjects/Keywords: TA Engineering (General). Civil engineering (General)

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APA (6^th Edition):

Muhamedsalih, H. (2013). Investigation of Wavelength Scanning Interferometry for Embedded Metrology. (Doctoral Dissertation). University of Huddersfield. Retrieved from http://eprints.hud.ac.uk/id/eprint/18090/1/Hussam_Muhamedsalih_-_Final_Thesis.pdf

Chicago Manual of Style (16^th Edition):

Muhamedsalih, Hussam. “Investigation of Wavelength Scanning Interferometry for Embedded Metrology.” 2013. Doctoral Dissertation, University of Huddersfield. Accessed March 01, 2021. http://eprints.hud.ac.uk/id/eprint/18090/1/Hussam_Muhamedsalih_-_Final_Thesis.pdf.

MLA Handbook (7^th Edition):

Muhamedsalih, Hussam. “Investigation of Wavelength Scanning Interferometry for Embedded Metrology.” 2013. Web. 01 Mar 2021.

Vancouver:

Muhamedsalih H. Investigation of Wavelength Scanning Interferometry for Embedded Metrology. [Internet] [Doctoral dissertation]. University of Huddersfield; 2013. [cited 2021 Mar 01]. Available from: http://eprints.hud.ac.uk/id/eprint/18090/1/Hussam_Muhamedsalih_-_Final_Thesis.pdf.

Council of Science Editors:

Muhamedsalih H. Investigation of Wavelength Scanning Interferometry for Embedded Metrology. [Doctoral Dissertation]. University of Huddersfield; 2013. Available from: http://eprints.hud.ac.uk/id/eprint/18090/1/Hussam_Muhamedsalih_-_Final_Thesis.pdf

University of Huddersfield

12. Lou, Shan. Discrete algorithms for morphological filters in geometrical metrology.

Degree: 2013, University of Huddersfield

URL: http://eprints.hud.ac.uk/id/eprint/18103/1/Final_Thesis_-_May_2013.pdf

► In geometrical metrology, morphological filters are useful tools for the surface texture analysis and functional prediction. Although they are generally accepted and regarded as the… (more)

▼ In geometrical metrology, morphological filters are useful tools for the surface texture analysis and functional prediction. Although they are generally accepted and regarded as the complement to mean-line based filters, they are not universally adopted in practice due to a number of fatal limitations in their implementations —they are restricted to planar surfaces, uniform sampled surfaces, time-consuming and suffered from end distortions and limited sizes of structuring elements. A novel morphological method is proposed based on the alpha shape with the advantages over traditional methods that it enables arbitrary large ball radii, and applies to freeform surfaces and non-uniform sampled surfaces. A practical algorithm is developed based on the theoretical link between the alpha hull and morphological envelopes. The performance bottleneck due to the costly 3D Delaunay triangulation is solved by the divide-and-conquer optimization. Aiming to overcome the deficits of the alpha shape method that the structuring element has to be circular and the computation relies on the Delaunay triangulation, a set of definitions, propositions and comments for searching contact points is proposed and mathematically proved based on alpha shape theory, followed by the construction of a recursive algorithm. The algorithm could precisely capture contact points without performing the Delaunay triangulation. By correlating the convex hull and morphological envelopes, the Graham scan algorithm, originally developed for the convex hull, is modified to compute morphological profile envelopes with an excellent performance achieved. The three novel methods along with the two traditional methods are compared and analyzed to evaluate their advantages and disadvantages. The end effects of morphological filtration on open surfaces are discussed and four end effect correction methods are explored. Case studies are presented to demonstrate the feasibility and capabilities of using the proposed discrete algorithms.

Subjects/Keywords: TA Engineering (General). Civil engineering (General)

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Lou, S. (2013). Discrete algorithms for morphological filters in geometrical metrology. (Doctoral Dissertation). University of Huddersfield. Retrieved from http://eprints.hud.ac.uk/id/eprint/18103/1/Final_Thesis_-_May_2013.pdf

Chicago Manual of Style (16^th Edition):

Lou, Shan. “Discrete algorithms for morphological filters in geometrical metrology.” 2013. Doctoral Dissertation, University of Huddersfield. Accessed March 01, 2021. http://eprints.hud.ac.uk/id/eprint/18103/1/Final_Thesis_-_May_2013.pdf.

MLA Handbook (7^th Edition):

Lou, Shan. “Discrete algorithms for morphological filters in geometrical metrology.” 2013. Web. 01 Mar 2021.

Vancouver:

Lou S. Discrete algorithms for morphological filters in geometrical metrology. [Internet] [Doctoral dissertation]. University of Huddersfield; 2013. [cited 2021 Mar 01]. Available from: http://eprints.hud.ac.uk/id/eprint/18103/1/Final_Thesis_-_May_2013.pdf.

Council of Science Editors:

Lou S. Discrete algorithms for morphological filters in geometrical metrology. [Doctoral Dissertation]. University of Huddersfield; 2013. Available from: http://eprints.hud.ac.uk/id/eprint/18103/1/Final_Thesis_-_May_2013.pdf

University of Huddersfield

13. Maatgi, Musbah. An Exploratory Study to Examine Relationships Between the Work Environment and Success of ISO 9000 Implementation in the Context of SMEs.

Degree: 2014, University of Huddersfield

URL: http://eprints.hud.ac.uk/id/eprint/25441/1/Musbah%20Kharis%20Maatgi%20Ph%20D%20Thesis.pdf

► The ISO 9000 standards are widely used throughout the world, and are becoming the most important quality standards. Thousands of enterprises all over the world… (more)

▼ The ISO 9000 standards are widely used throughout the world, and are becoming the most important quality standards. Thousands of enterprises all over the world have already adopted these standards, with many more in the process of doing so. A range of benefits can be achieved by the implementation of ISO 9000 standards, such as increased customer satisfaction, reduced defects, improved efficiency of the quality system, and improved market share. However Small and Medium-sized Enterprises (SMEs) face difficulties when implementing ISO 9000 standards. This can be due to employees’ internal resistance to change, paperwork consumption, and high implementation and maintenance costs. Most SMEs are unable to cover the expenses of training and development programmes as a result of restricted financial resources. The managers of SMEs planning to implement ISO 9000 standards and maintain the certification of ISO 9001 standard for long periods should create an empowering work environment in which continuous improvement can take place. The aim of this research is to examine the relationships between the work environment and success of ISO 9000 implementation in the context of SMEs. This study begins with the completion of a comprehensive literature review focused on Enterprise Strategy, ISO 9000 Standards and Organisational Development. The literature review is followed by the research methodology, which illustrates the methods and research tools used to collect data pertinent to this research. These include exploratory survey and case studies which led to the main findings of the research. The collected data have been analysed through the use of Social Package Statistical Software (SPSS) and Microsoft’s Excel software. The findings of this research show that there are critical success factors that impact the work environment. These factors are represented in terms of temperature, noise, job security, individual recognition, salary, reward systems, quality awareness, and relationships. By integrating the literature review and the research findings, a simple work environment model has been devised. This model has been designed with consideration to the combination of factors described in the motivation theories of Maslow and Herzberg, along with health and safety legislations in the work place. This research contributes to the redefinition of the work environment in ISO 9001 standard. The researcher has designed the Work Environment Assessment Guide as a document to aid SMEs in evaluating and subsequently improving their work environment.

Subjects/Keywords: TA Engineering (General). Civil engineering (General)

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Maatgi, M. (2014). An Exploratory Study to Examine Relationships Between the Work Environment and Success of ISO 9000 Implementation in the Context of SMEs. (Doctoral Dissertation). University of Huddersfield. Retrieved from http://eprints.hud.ac.uk/id/eprint/25441/1/Musbah%20Kharis%20Maatgi%20Ph%20D%20Thesis.pdf

Chicago Manual of Style (16^th Edition):

Maatgi, Musbah. “An Exploratory Study to Examine Relationships Between the Work Environment and Success of ISO 9000 Implementation in the Context of SMEs.” 2014. Doctoral Dissertation, University of Huddersfield. Accessed March 01, 2021. http://eprints.hud.ac.uk/id/eprint/25441/1/Musbah%20Kharis%20Maatgi%20Ph%20D%20Thesis.pdf.

MLA Handbook (7^th Edition):

Maatgi, Musbah. “An Exploratory Study to Examine Relationships Between the Work Environment and Success of ISO 9000 Implementation in the Context of SMEs.” 2014. Web. 01 Mar 2021.

Vancouver:

Maatgi M. An Exploratory Study to Examine Relationships Between the Work Environment and Success of ISO 9000 Implementation in the Context of SMEs. [Internet] [Doctoral dissertation]. University of Huddersfield; 2014. [cited 2021 Mar 01]. Available from: http://eprints.hud.ac.uk/id/eprint/25441/1/Musbah%20Kharis%20Maatgi%20Ph%20D%20Thesis.pdf.

Council of Science Editors:

Maatgi M. An Exploratory Study to Examine Relationships Between the Work Environment and Success of ISO 9000 Implementation in the Context of SMEs. [Doctoral Dissertation]. University of Huddersfield; 2014. Available from: http://eprints.hud.ac.uk/id/eprint/25441/1/Musbah%20Kharis%20Maatgi%20Ph%20D%20Thesis.pdf

University of Huddersfield

14. Sztendel, Sebastian. Model Referenced Condition Monitoring of High Performance CNC Machine Tools.

Degree: 2016, University of Huddersfield

URL: http://eprints.hud.ac.uk/id/eprint/34112/1/FINAL%20THESIS%20-%20Sztendel%20.pdf

► Generally, machine tool monitoring is the prediction of the system’s health based on signal acquisition and processing and classification in order to identify the causes… (more)

▼ Generally, machine tool monitoring is the prediction of the system’s health based on signal acquisition and processing and classification in order to identify the causes of the problem. The producers of machine tools need to pay more attention to their products life cycle because their customers increasingly focus on machine tool reliability and costs. The present study is concerned with the development of a condition monitoring system for high speed Computer Numerical Control (CNC) milling machine tools. A model is a simplification of a real machine to visualize the dynamics of a mechatronic system. This thesis applies recent modelling techniques to represent all parameters which affect the accuracy of a component produced automatically. The control can achieve an accuracy approaching the tolerance restrictions imposed by the machine tool axis repeatability and its operating environment. The motion control system of the CNC machine tool is described and the elements, which compose the axis drives including both the electrical components and the mechanical ones, are analysed and modelled. SIMULINK models have been developed to represent the majority of the dynamic behaviour of the feed drives from the actual CNC machine tool. Various values for the position controller and the load torque have been applied to the motor to show their behaviour. Development of a mechatronic hybrid model for five-axis CNC machine tool using Multi-Body-System (MBS) simulation approach is described. Analysis of CNC machine tool performance under non-cutting conditions is developed. ServoTrace data have been used to validate the Multi-body simulation of tool-to-workpiece position. This thesis aspects the application of state of art sensing methods in the field of condition monitoring of electromechanical systems. The ballscrew-with-nut is perhaps the most prevalent CNC machine subsystem and the condition of each element is crucial to the success of a machining operation. It’s essential to know of the health status of ballscrew, bearings and nut. Acoustic emission analysis of machines has been carried out to determine the deterioration of the ballscrew. Standard practices such as use of a Laser Interferometer have been used to determine the position of the machine tool. A novel machine feed drive condition monitoring system using acoustic emission (AE) signals has been proposed. The AE monitoring techniques investigated can be categorised into traditional AE parameters of energy, event duration and peak amplitude. These events are selected and normalised to estimate remaining life of the machine. This method is shown to be successfully applied for the ballscrew subsystem of an industrial high-speed milling machine. Finally, the successful outcome of the project will contribute to machine tool industry making possible manufacturing of more accurate products with lower costs in shorter time.

Subjects/Keywords: TA Engineering (General). Civil engineering (General)

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Sztendel, S. (2016). Model Referenced Condition Monitoring of High Performance CNC Machine Tools. (Doctoral Dissertation). University of Huddersfield. Retrieved from http://eprints.hud.ac.uk/id/eprint/34112/1/FINAL%20THESIS%20-%20Sztendel%20.pdf

Chicago Manual of Style (16^th Edition):

Sztendel, Sebastian. “Model Referenced Condition Monitoring of High Performance CNC Machine Tools.” 2016. Doctoral Dissertation, University of Huddersfield. Accessed March 01, 2021. http://eprints.hud.ac.uk/id/eprint/34112/1/FINAL%20THESIS%20-%20Sztendel%20.pdf.

MLA Handbook (7^th Edition):

Sztendel, Sebastian. “Model Referenced Condition Monitoring of High Performance CNC Machine Tools.” 2016. Web. 01 Mar 2021.

Vancouver:

Sztendel S. Model Referenced Condition Monitoring of High Performance CNC Machine Tools. [Internet] [Doctoral dissertation]. University of Huddersfield; 2016. [cited 2021 Mar 01]. Available from: http://eprints.hud.ac.uk/id/eprint/34112/1/FINAL%20THESIS%20-%20Sztendel%20.pdf.

Council of Science Editors:

Sztendel S. Model Referenced Condition Monitoring of High Performance CNC Machine Tools. [Doctoral Dissertation]. University of Huddersfield; 2016. Available from: http://eprints.hud.ac.uk/id/eprint/34112/1/FINAL%20THESIS%20-%20Sztendel%20.pdf

University of Huddersfield

15. Moore, Austin. An Investigation into Non-Linear Sonic Signatures with a Focus on Dynamic Range Compression and the 1176 Fet Compressor.

Degree: 2017, University of Huddersfield

URL: http://eprints.hud.ac.uk/id/eprint/34118/1/FINAL%20THESIS%20-%20MOORE.pdf

► Dynamic range compression (DRC) is a common process in music production. Traditionally used to control the dynamic range of signals and reduce the risk of… (more)

▼ Dynamic range compression (DRC) is a common process in music production. Traditionally used to control the dynamic range of signals and reduce the risk of overloading recording devices, over time it has developed into a creative colouration effect rather than a preventative measure. This thesis investigates sonic signatures, distortion, non-linearity and how audio material is coloured during the music production process. It explores how methodologies used to measure distortion and timbre can be used to define the sonic signature of hardware compressors and other pieces of music production equipment. A grounded theory and content analysis study was carried out to explore how producers use DRC in their work, how they describe its sound quality, which compressors they frequently use and which audio sources they process with particular types of compressor. The results from this qualitative study reveal that producers use compressors to manipulate the timbre of program material and select specific compressors with particular settings for colouration effects. Tests were carried out on a number of popular vintage hardware compressors to assess their sonic signature. Firstly, a comparative study was conducted on the Teletronix LA2A, Fairchild 670, Urei 1176 and dbx165A. Secondly a comprehensive in-depth analysis was undertaken of the 1176 to fully catalogue its sonic signature over a range of settings and to compare results from a vintage Urei Blackface 1176 and a modern Universal Audio reissue. Objective analysis was conducted on the compressors using Total Harmonic Distortion (THD), Intermodulation Distortion (IMD) and tone burst measurements. Complex program material was analysed using spectrum analysis, critical listening and audio feature extraction. It was found the compressors all have subtle nuances to their sonic signature as a result of elements in their design colouring the audio with non-linear artefacts. The 1176 was shown to impart significant amounts of distortion when used in its all-buttons mode and with fast attack and release configurations. This style of processing was favoured by producers in the qualitative study.

Subjects/Keywords: TA Engineering (General). Civil engineering (General)

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Moore, A. (2017). An Investigation into Non-Linear Sonic Signatures with a Focus on Dynamic Range Compression and the 1176 Fet Compressor. (Doctoral Dissertation). University of Huddersfield. Retrieved from http://eprints.hud.ac.uk/id/eprint/34118/1/FINAL%20THESIS%20-%20MOORE.pdf

Chicago Manual of Style (16^th Edition):

Moore, Austin. “An Investigation into Non-Linear Sonic Signatures with a Focus on Dynamic Range Compression and the 1176 Fet Compressor.” 2017. Doctoral Dissertation, University of Huddersfield. Accessed March 01, 2021. http://eprints.hud.ac.uk/id/eprint/34118/1/FINAL%20THESIS%20-%20MOORE.pdf.

MLA Handbook (7^th Edition):

Moore, Austin. “An Investigation into Non-Linear Sonic Signatures with a Focus on Dynamic Range Compression and the 1176 Fet Compressor.” 2017. Web. 01 Mar 2021.

Vancouver:

Moore A. An Investigation into Non-Linear Sonic Signatures with a Focus on Dynamic Range Compression and the 1176 Fet Compressor. [Internet] [Doctoral dissertation]. University of Huddersfield; 2017. [cited 2021 Mar 01]. Available from: http://eprints.hud.ac.uk/id/eprint/34118/1/FINAL%20THESIS%20-%20MOORE.pdf.

Council of Science Editors:

Moore A. An Investigation into Non-Linear Sonic Signatures with a Focus on Dynamic Range Compression and the 1176 Fet Compressor. [Doctoral Dissertation]. University of Huddersfield; 2017. Available from: http://eprints.hud.ac.uk/id/eprint/34118/1/FINAL%20THESIS%20-%20MOORE.pdf

University of Huddersfield

16. Hassin, Osama A.A. Condition Monitoring of Journal Bearings for Predictive Maintenance Management Based on High Frequency Vibration Analysis.

Degree: 2017, University of Huddersfield

URL: http://eprints.hud.ac.uk/id/eprint/34161/1/FINAL%20THESIS%20-%20Hassin.pdf

► Journal bearings are widely used as rotor supports in many machinery systems such as engines, motors, turbines and huge pumps. The journal bearing is simply… (more)

▼ Journal bearings are widely used as rotor supports in many machinery systems such as engines, motors, turbines and huge pumps. The journal bearing is simply designed, highly efficient, has a long life, low cost and doesn’t fail easily. Based on preventive maintenance strategies, many monitoring techniques are developed for monitoring journal bearings such as lubricant analysis, vibration analysis, noise and acoustic emission analysis. Vibration monitoring techniques have been developed and it can be implemented online or offline without interrupting the machine operations. The vibration phenomena in a journal bearing is complicated which combined between different types of signals created by different sources. To understand this phenomenon, a vibration model is established for fault diagnosis, which includes not only conventional hydrodynamic forces but also excitations of both asperity collisions and churns. However, mis-operations and oil degradation in the journal bearings might cause unexpected and sudden failure which is risky in machines and operators. Consequently, clustering technique is used to investigate into vibration responses of journal bearings for identifying different lubrication regimes as categorised by the classic Stribeck curve. High frequency clustering allows different lubricant oils and different lubrication regimes to be identified appropriately, providing feasible ways for online monitoring of bearing conditions. Additionally, modulation signal bispectrum magnitude results represent the nonlinear vibration responses with two distinctive bifrequency patterns corresponding to instable lubrication and asperity interactions. Using entropy measures, these instable operating conditions are classified to be the low loads cases. Furthermore, average MSB magnitudes are used to differentiate the asperity interactions between asperity collisions and the asperity churns. In addition, the oil starvation of a journal bearing has been found by MSB analysis that the instable frequency can affect the measured vibration responses. Moreover, the structural resonances in the high frequency range can better reflect the separation of different oil levels under wide operating conditions. Finally, As a result of worn bearings, shaft fluctuation increases and asperity collisions decreases. Thus a worn bearing is not all the time good because of instability.

Subjects/Keywords: TA Engineering (General). Civil engineering (General)

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Hassin, O. A. A. (2017). Condition Monitoring of Journal Bearings for Predictive Maintenance Management Based on High Frequency Vibration Analysis. (Doctoral Dissertation). University of Huddersfield. Retrieved from http://eprints.hud.ac.uk/id/eprint/34161/1/FINAL%20THESIS%20-%20Hassin.pdf

Chicago Manual of Style (16^th Edition):

Hassin, Osama A A. “Condition Monitoring of Journal Bearings for Predictive Maintenance Management Based on High Frequency Vibration Analysis.” 2017. Doctoral Dissertation, University of Huddersfield. Accessed March 01, 2021. http://eprints.hud.ac.uk/id/eprint/34161/1/FINAL%20THESIS%20-%20Hassin.pdf.

MLA Handbook (7^th Edition):

Hassin, Osama A A. “Condition Monitoring of Journal Bearings for Predictive Maintenance Management Based on High Frequency Vibration Analysis.” 2017. Web. 01 Mar 2021.

Vancouver:

Hassin OAA. Condition Monitoring of Journal Bearings for Predictive Maintenance Management Based on High Frequency Vibration Analysis. [Internet] [Doctoral dissertation]. University of Huddersfield; 2017. [cited 2021 Mar 01]. Available from: http://eprints.hud.ac.uk/id/eprint/34161/1/FINAL%20THESIS%20-%20Hassin.pdf.

Council of Science Editors:

Hassin OAA. Condition Monitoring of Journal Bearings for Predictive Maintenance Management Based on High Frequency Vibration Analysis. [Doctoral Dissertation]. University of Huddersfield; 2017. Available from: http://eprints.hud.ac.uk/id/eprint/34161/1/FINAL%20THESIS%20-%20Hassin.pdf

University of Huddersfield

17. Towsyfyan, Hossein. Investigation of the Nonlinear Tribological Behaviour of Mechanical Seals for Online Condition Monitoring.

Degree: 2017, University of Huddersfield

URL: http://eprints.hud.ac.uk/id/eprint/34340/1/FINAL%20THESIS%20-%20Towsyfyan.pdf

► Mechanical seals have increasingly been used for sealing rotating shafts in centrifugal pumps, propeller shafts in ships and submarines, compressors, liquid propellant rocket motors in… (more)

▼ Mechanical seals have increasingly been used for sealing rotating shafts in centrifugal pumps, propeller shafts in ships and submarines, compressors, liquid propellant rocket motors in aerospace industry, pumps, turbines, mixers and many other rotating machines during last two decades. Abnormal operating conditions in the mechanical seals will degrade machine performance, increase operating cost and may cause unexpected sudden failures which are dangerous in both engineering and safety terms. Hence it is necessary to investigate the tribological behaviour of mechanical seals operating based on nonlinear coupling between fluid and surface dynamics, in order to develop more advanced diagnostic technologies to improve the reliability of such machines operating with mechanical seals. Different condition monitoring techniques have been studied to evaluate the lubrication state and severity of contact between the mating faces in mechanical seals. However, some of them are not cost effective others are not practical in industrial applications. Acoustic emission (AE) has been proved to be a sensitive indicator of lubrication conditions and changes in the lubricant properties, however the application of technique for identification of lubrication regimes in mechanical seals has not been reported yet. Moreover, previous studies give relatively little information to acoustic emission condition monitoring of mechanical seals, nor has comprehensive fault detection been implemented for a particular case. In addition, a review on previous works reveals the lack of comprehensive mathematical models to explain the relationship between AE energy and tribological characteristics of the mating faces under healthy and faulty conditions. In this research, the tribological behaviour of mechanical seals is investigated using acoustic emission measurements to pave a way for fault detection at early stage. Three common seal failures i.e. dry running, spring fault, and defective seal are studied in this thesis. The main objective is to extract AE features that can explain the tribological behaviour of mechanical seals under both healthy and faulty conditions. To achieve this, a purpose-built test rig was employed for collecting AE signals from the mechanical seals. Then, the collected data was processed using time domain, frequency domain and time frequency domain analysis methods which are of the most common techniques used for monitoring in AE applications. Based on results the main frequency band that can present the tribological behaviour of mechanical seals was detected. Also it has been proved that AE features in time domain and frequency domain can be effectively applied to indicate the lubrication condition of mechanical seals as well as early fault detection. Moreover, mathematical models were developed to establish a relationship between AE root mean square (RMS) value of AE signals and working parameters of seals (rotational speed, load and number of asperities in contact) under different lubrication regimes. A good…

Subjects/Keywords: TA Engineering (General). Civil engineering (General)

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Towsyfyan, H. (2017). Investigation of the Nonlinear Tribological Behaviour of Mechanical Seals for Online Condition Monitoring. (Doctoral Dissertation). University of Huddersfield. Retrieved from http://eprints.hud.ac.uk/id/eprint/34340/1/FINAL%20THESIS%20-%20Towsyfyan.pdf

Chicago Manual of Style (16^th Edition):

Towsyfyan, Hossein. “Investigation of the Nonlinear Tribological Behaviour of Mechanical Seals for Online Condition Monitoring.” 2017. Doctoral Dissertation, University of Huddersfield. Accessed March 01, 2021. http://eprints.hud.ac.uk/id/eprint/34340/1/FINAL%20THESIS%20-%20Towsyfyan.pdf.

MLA Handbook (7^th Edition):

Towsyfyan, Hossein. “Investigation of the Nonlinear Tribological Behaviour of Mechanical Seals for Online Condition Monitoring.” 2017. Web. 01 Mar 2021.

Vancouver:

Towsyfyan H. Investigation of the Nonlinear Tribological Behaviour of Mechanical Seals for Online Condition Monitoring. [Internet] [Doctoral dissertation]. University of Huddersfield; 2017. [cited 2021 Mar 01]. Available from: http://eprints.hud.ac.uk/id/eprint/34340/1/FINAL%20THESIS%20-%20Towsyfyan.pdf.

Council of Science Editors:

Towsyfyan H. Investigation of the Nonlinear Tribological Behaviour of Mechanical Seals for Online Condition Monitoring. [Doctoral Dissertation]. University of Huddersfield; 2017. Available from: http://eprints.hud.ac.uk/id/eprint/34340/1/FINAL%20THESIS%20-%20Towsyfyan.pdf

University of Huddersfield

18. Wallis, Rory. The Analysis of Frequency Dependent Vertical Localisation Thresholds and the Perceptual Effects of Vertical Interchannel Crosstalk.

Degree: 2017, University of Huddersfield

URL: http://eprints.hud.ac.uk/id/eprint/34350/1/FINAL%20THESIS%20-%20Wallis.pdf

► In the context of microphone techniques for recording three-dimensional (3D) sound in an acoustic space, vertical interchannel crosstalk occurs when the height layer of microphones… (more)

▼ In the context of microphone techniques for recording three-dimensional (3D) sound in an acoustic space, vertical interchannel crosstalk occurs when the height layer of microphones capture direct sound. This effect can cause sound images to be formed as vertically oriented phantom images, at positions intermediate between the main and height layer of loudspeakers, as opposed to at the desired position of the main layer. Additional spatial and timbral effects will also be perceived, although these have not yet been examined in the literature. Previous research has examined the minimum amount of attenuation of direct sound in the height layer necessary to prevent vertical interchannel crosstalk from affecting the perceived location of the main channel signal, which has become known as the 'localisation threshold'. However, existing methods of applying this have not considered the frequency dependency of median plane localisation. The present thesis therefore examined if localisation thresholds could be applied through the frequency dependent manipulation of the direct sound in the height layer (band reduction), as well as the most salient perceptual effects of vertical interchannel crosstalk. The operation of the precedence effect in the median plane was also considered. A review of human localisation mechanisms was first conducted, with a particular focus on how such characteristics might be able to be exploited for the development of a band reduction method. Additionally, consideration was also given to how secondary vertical sources might affect direct sounds, in order to gain further understanding of what the most salient effects of vertical interchannel crosstalk might be. The frequency dependency of localisation thresholds was considered in anechoic conditions, with subsequent localisation experiments being conducted to assist in explaining the results. Following this, localisation thresholds using blanket reduction (attenuation of the direct sound in the height layer evenly across the spectrum) were analysed. The frequency dependency of localisation threshold was subsequently examined in a natural listening environment, with a series of band reduction methods being developed based on the results. The band and blanket reduction thresholds were then verified in localisation tests. The final experiment considered the most salient effects of vertical interchannel crosstalk, how these were affected when the different localisation threshold methods were applied and which was the most preferred method by subjects. The results showed that localisation thresholds are frequency dependent in both anechoic and natural listening environments. In particular, more level reduction was necessary for the mid-high frequencies compared to low frequencies. Additionally, a series of different band reduction methods were found to be effective. Elicitation experiments showed that the most salient effects of vertical interchannel crosstalk were increases in vertical image spread, source elevation, loudness and fullness,…

Subjects/Keywords: TA Engineering (General). Civil engineering (General)

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Wallis, R. (2017). The Analysis of Frequency Dependent Vertical Localisation Thresholds and the Perceptual Effects of Vertical Interchannel Crosstalk. (Doctoral Dissertation). University of Huddersfield. Retrieved from http://eprints.hud.ac.uk/id/eprint/34350/1/FINAL%20THESIS%20-%20Wallis.pdf

Chicago Manual of Style (16^th Edition):

Wallis, Rory. “The Analysis of Frequency Dependent Vertical Localisation Thresholds and the Perceptual Effects of Vertical Interchannel Crosstalk.” 2017. Doctoral Dissertation, University of Huddersfield. Accessed March 01, 2021. http://eprints.hud.ac.uk/id/eprint/34350/1/FINAL%20THESIS%20-%20Wallis.pdf.

MLA Handbook (7^th Edition):

Wallis, Rory. “The Analysis of Frequency Dependent Vertical Localisation Thresholds and the Perceptual Effects of Vertical Interchannel Crosstalk.” 2017. Web. 01 Mar 2021.

Vancouver:

Wallis R. The Analysis of Frequency Dependent Vertical Localisation Thresholds and the Perceptual Effects of Vertical Interchannel Crosstalk. [Internet] [Doctoral dissertation]. University of Huddersfield; 2017. [cited 2021 Mar 01]. Available from: http://eprints.hud.ac.uk/id/eprint/34350/1/FINAL%20THESIS%20-%20Wallis.pdf.

Council of Science Editors:

Wallis R. The Analysis of Frequency Dependent Vertical Localisation Thresholds and the Perceptual Effects of Vertical Interchannel Crosstalk. [Doctoral Dissertation]. University of Huddersfield; 2017. Available from: http://eprints.hud.ac.uk/id/eprint/34350/1/FINAL%20THESIS%20-%20Wallis.pdf

University of Huddersfield

19. Jilani, Rabia. Learning Static Knowledge for AI Planning Domain Models via Plan Traces.

Degree: 2017, University of Huddersfield

URL: http://eprints.hud.ac.uk/id/eprint/34414/1/FINAL%20THESIS%20-%20Jilani.pdf

► Learning is fundamental to autonomous behaviour and from the point of view of Machine Learning, it is the ability of computers to learn without being… (more)

▼ Learning is fundamental to autonomous behaviour and from the point of view of Machine Learning, it is the ability of computers to learn without being programmed explicitly. Attaining such capability for learning domain models for Automated Planning (AP) engines is what triggered research into developing automated domain-learning systems. These systems can learn from training data. Until recent research it was believed that working in dynamically changing and unpredictable environments, it was not possible to construct action models a priori. After the research in the last decade, many systems have proved effective in engineering domain models by learning from plan traces. However, these systems require additional planner oriented information such as a partial domain model, initial, goal and/or intermediate states. Hence, a question arises - whether or not we can learn a dynamic domain model, which covers all domain behaviours from real-time action sequence traces only. The research in this thesis extends an area of the most promising line of work that is connected to work presented in an REF Journal paper. This research aims to enhance the LOCM system and to extend the method of Learning Domain Models for AI Planning Engines via Plan Traces. This method was first published in ICAPS 2009 by Cresswell, McCluskey, and West (Cresswell, 2009). LOCM is unique in that it requires no prior knowledge of the target domain; however, it can produce a dynamic part of a domain model from training. Its main drawback is that it does not produce static knowledge of the domain, and its model lacks certain expressive features. A key aspect of research presented in this thesis is to enhance the technique with the capacity to generate static knowledge. A test and focus for this PhD is to make LOCM able to learn static relationships in a fully automatic way in addition to the dynamic relationships, which LOCM can already learn, using plan traces as input. We present a novel system - The ASCoL (Automatic Static Constraints Learner) which provides a graphical interface for visual representation and exploits directed graph discovery and analysis technique. It has been designed to discover domain-specific static relations/constraints automatically in order to enhance planning domain models. The ASCoL method has wider applications. Combined with LOCM, ASCoL can be a useful tool to produce benchmark domains for automated planning engines. It is also useful as a debugging tool for improving existing domain models. We have evaluated ASCoL on fifteen different IPC domains and on different types of goal-oriented and random-walk plans as input training data and it has been shown to be effective.

Subjects/Keywords: TA Engineering (General). Civil engineering (General)

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Jilani, R. (2017). Learning Static Knowledge for AI Planning Domain Models via Plan Traces. (Doctoral Dissertation). University of Huddersfield. Retrieved from http://eprints.hud.ac.uk/id/eprint/34414/1/FINAL%20THESIS%20-%20Jilani.pdf

Chicago Manual of Style (16^th Edition):

Jilani, Rabia. “Learning Static Knowledge for AI Planning Domain Models via Plan Traces.” 2017. Doctoral Dissertation, University of Huddersfield. Accessed March 01, 2021. http://eprints.hud.ac.uk/id/eprint/34414/1/FINAL%20THESIS%20-%20Jilani.pdf.

MLA Handbook (7^th Edition):

Jilani, Rabia. “Learning Static Knowledge for AI Planning Domain Models via Plan Traces.” 2017. Web. 01 Mar 2021.

Vancouver:

Jilani R. Learning Static Knowledge for AI Planning Domain Models via Plan Traces. [Internet] [Doctoral dissertation]. University of Huddersfield; 2017. [cited 2021 Mar 01]. Available from: http://eprints.hud.ac.uk/id/eprint/34414/1/FINAL%20THESIS%20-%20Jilani.pdf.

Council of Science Editors:

Jilani R. Learning Static Knowledge for AI Planning Domain Models via Plan Traces. [Doctoral Dissertation]. University of Huddersfield; 2017. Available from: http://eprints.hud.ac.uk/id/eprint/34414/1/FINAL%20THESIS%20-%20Jilani.pdf

University of Huddersfield

20. Myers, Alan. The Effect of Concrete Foundations and Machine Thermal Conditions on the Accuracy of Large Machine Tools.

Degree: 2017, University of Huddersfield

URL: http://eprints.hud.ac.uk/id/eprint/34454/1/FINAL%20THESIS%20-%20Myers.pdf

► This thesis comprises of eighteen publications which describe research work which has been carried out into two aspects regarding the accuracy of large machine tools.… (more)

▼ This thesis comprises of eighteen publications which describe research work which has been carried out into two aspects regarding the accuracy of large machine tools. The first six papers discuss the concrete foundations on which the machines are supported and the remaining twelve papers describe the consequences of thermal effects on machines. The publications are all ones of joint authorship, with the candidate being one of the named authors. Manufacturing industry and the precision requirements of large machine tools: The thesis reviews the range of errors and their causes that effect large machine tools and then specifically addresses what are considered to be two of the most significant contributors to these inaccuracies, namely those caused by the concrete foundations which support the machines and those caused by thermal effects. Both can cause problems that can be very difficult and extremely expensive to resolve. After a concrete foundation has been cast, if it is found to be inadequate it cannot, of course, be easily modified and thermal effects such as environmental temperature changes for instance can require the use of factory air conditioning systems which are expensive to install, operate and maintain. The publications included in the thesis show a systematic contribution to significantly improving the accuracy of large machine tools with respect to the two mentioned subjects. Modern components: Components used in modern equipment such as cars, trains, aircraft, robots, household appliances etc. require good functionality, reliability, long life, light weight etc. A significant contributor to these requirements is the high degree of precision [1] that these components are manufactured to in terms of their dimensions, form and surface finish. Production of virtually all of these components is achieved either directly or indirectly by use of machine tools. Therefore the machine tools need to perform extremely accurately, even more so than the components they produce since other factors such as fixtures, tooling etc. cause additional inaccuracies. Machine tool Accuracy: To achieve high accuracy performance, the machines need to move in a precise manner in terms of their straightness of movement, positional accuracy, rotational orientation and the relationship of one axis to another etc. It is also important that the accuracy is repeatable in order to guarantee the level of performance at all times. Large machine tools: Large machine tools can weigh hundreds of tonnes, have traverses of eighty metres length or more and are used for machining a vast variety of components such as nuclear reactor vessels, marine diesel engines, valve bodies, rolls for steel mills, aircraft wing components such as skins, ribs, stringers and spars and large undercarriage components. Foundations: Because the machines being considered are large and heavy their influence on the concrete foundations that support them is considerable and as a machine moves through its traverses the position of the center of…

Subjects/Keywords: TA Engineering (General). Civil engineering (General)

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Myers, A. (2017). The Effect of Concrete Foundations and Machine Thermal Conditions on the Accuracy of Large Machine Tools. (Doctoral Dissertation). University of Huddersfield. Retrieved from http://eprints.hud.ac.uk/id/eprint/34454/1/FINAL%20THESIS%20-%20Myers.pdf

Chicago Manual of Style (16^th Edition):

Myers, Alan. “The Effect of Concrete Foundations and Machine Thermal Conditions on the Accuracy of Large Machine Tools.” 2017. Doctoral Dissertation, University of Huddersfield. Accessed March 01, 2021. http://eprints.hud.ac.uk/id/eprint/34454/1/FINAL%20THESIS%20-%20Myers.pdf.

MLA Handbook (7^th Edition):

Myers, Alan. “The Effect of Concrete Foundations and Machine Thermal Conditions on the Accuracy of Large Machine Tools.” 2017. Web. 01 Mar 2021.

Vancouver:

Myers A. The Effect of Concrete Foundations and Machine Thermal Conditions on the Accuracy of Large Machine Tools. [Internet] [Doctoral dissertation]. University of Huddersfield; 2017. [cited 2021 Mar 01]. Available from: http://eprints.hud.ac.uk/id/eprint/34454/1/FINAL%20THESIS%20-%20Myers.pdf.

Council of Science Editors:

Myers A. The Effect of Concrete Foundations and Machine Thermal Conditions on the Accuracy of Large Machine Tools. [Doctoral Dissertation]. University of Huddersfield; 2017. Available from: http://eprints.hud.ac.uk/id/eprint/34454/1/FINAL%20THESIS%20-%20Myers.pdf

University of Huddersfield

21. Obie, Ogheneochuko. Density Measurement of Multiphase Pipe Flows.

Degree: 2018, University of Huddersfield

URL: http://eprints.hud.ac.uk/id/eprint/34527/1/Ogheneochuko%20Obie%20FINAL%20THESIS.PDF

► Density is an important physical property and its measurement has wide application in a vast number of industries including; oil and gas, petrochemical, pharmaceutical, brewing,… (more)

▼ Density is an important physical property and its measurement has wide application in a vast number of industries including; oil and gas, petrochemical, pharmaceutical, brewing, food & beverage production and mining. Density is often required to be accurately measured either as a standalone property or in combination with other flow properties for the purpose of quality assessment, process control, and custody transfer. Given the increasing importance of density measurement, extensive research has been conducted over recent years to develop newer and more accurate density measurement sensors and to improve the accuracy of existing sensors. This thesis describes the design and development of a novel, non-invasive, non-radioactive Vibrating Density Measurement System (VDMS) capable of measuring fluid density in both single phase and multiphase flows. The device is also capable of measuring mean in-situ phase volume fractions in two-phase flows. The VDMS comprises three sub-units; (i) a measurement unit which includes a straight length of sensing pipe with corrugated bellows at both ends, an actuator and relevant sensors; (ii) a signal conditioning and processing unit; and (iii) a data acquisition unit. The thesis also reports the development of a novel mathematical density prediction model which is used in conjunction with the VDMS. It then goes on to report the results of static bench test experiments that were conducted on the VDMS using a bespoke test rig. These tests were performed (i) to obtain the mass of the sensing pipe, its stiffness constant and damping constant; (ii) to investigate the frequency response characteristics of the VDMS; (iii) to obtain the VDMS constant; (iv) to investigate the sensing pipe displacement pattern; (v) to investigate the capability of the VDMS to give accurate density measurements of static fluids and (vi) to define the optimal VDMS operating conditions. Computation of density was achieved using the VDMS, the density prediction model and a novel signal processing technique. This signal processing technique used the Discrete Fourier Transforms (DFTs) of the measured force, used to mechanically excite the sensing pipe at its centre, and the measured displacement at the sensing pipe centre. Next, the thesis reports a novel computer based control system that was developed to ensure that the VDMS automatically operated at its optimal operating conditions, so that errors in the density measurement were minimised. The control system was also capable of providing online computation of the flow mixture density. Results are reported of several experiments conducted by the author on the VDMS to measure the fluid density in a range of “water only” flows, “solids-in-water” flows and “air-in-water” flows. These flows were all vertically upward and were established in the working section of a multiphase flow loop. These multiphase flow experiments were subsequently extended to compute the mean in-situ phase volume fraction of the solids phase in “solids-water” flows and the…

Subjects/Keywords: TA Engineering (General). Civil engineering (General)

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Obie, O. (2018). Density Measurement of Multiphase Pipe Flows. (Doctoral Dissertation). University of Huddersfield. Retrieved from http://eprints.hud.ac.uk/id/eprint/34527/1/Ogheneochuko%20Obie%20FINAL%20THESIS.PDF

Chicago Manual of Style (16^th Edition):

Obie, Ogheneochuko. “Density Measurement of Multiphase Pipe Flows.” 2018. Doctoral Dissertation, University of Huddersfield. Accessed March 01, 2021. http://eprints.hud.ac.uk/id/eprint/34527/1/Ogheneochuko%20Obie%20FINAL%20THESIS.PDF.

MLA Handbook (7^th Edition):

Obie, Ogheneochuko. “Density Measurement of Multiphase Pipe Flows.” 2018. Web. 01 Mar 2021.

Vancouver:

Obie O. Density Measurement of Multiphase Pipe Flows. [Internet] [Doctoral dissertation]. University of Huddersfield; 2018. [cited 2021 Mar 01]. Available from: http://eprints.hud.ac.uk/id/eprint/34527/1/Ogheneochuko%20Obie%20FINAL%20THESIS.PDF.

Council of Science Editors:

Obie O. Density Measurement of Multiphase Pipe Flows. [Doctoral Dissertation]. University of Huddersfield; 2018. Available from: http://eprints.hud.ac.uk/id/eprint/34527/1/Ogheneochuko%20Obie%20FINAL%20THESIS.PDF

University of Huddersfield

22. Shaeboub, Abdulkarim. The Monitoring of Induction Machines Using Electrical Signals from the Variable Speed Drive.

Degree: 2018, University of Huddersfield

URL: http://eprints.hud.ac.uk/id/eprint/34555/1/Abdulkarim%20Shaeboub%20FINAL%20THESIS.PDF

► Induction motors are the most widely used industrial prime movers, mainly because of their simple yet powerful construction, ergonomic adaptability, rugged and highly robust structure… (more)

▼ Induction motors are the most widely used industrial prime movers, mainly because of their simple yet powerful construction, ergonomic adaptability, rugged and highly robust structure combined with high reliability. However, under extreme and complex operations, such motors are subject to premature faults, which can be more significant when variable speed drive (VSDs) are used, due to the presence of more voltage harmonics, spikes and increases in operating temperature. In addition, VSD based systems also cause more noise in measured instantaneous current signals. These make it more difficult to investigate and accurately diagnose system faults in order to keep VSD based motors operating at an optimal level and avoid excessive energy consumption and damage to system. However, insufficient work has been carried out exploring fault diagnosis using terminal voltage and motor current signals of VSD motors which are increasingly used in industry. To fill these gaps, this thesis investigates the detection of stator and rotor faults (i.e. shorted turn faults, open-circuit faults, broken rotor bars, and stator winding asymmetry combined with broken rotor bar faults) using electrical signals from VSDs under different loads and different speeds conditions. Evaluation results show that under open loop control mode, both stator and rotor faults cause an increase in the amplitude of sidebands of the motor current signature. However, no changes were found that could be used for fault detection in the motor voltage signature with respect to open loop control mode. This is because, when the drive is in open-loop operation, there is no feedback to the drive and torque oscillations modulate the motor current only. The V/Hz ratio is kept constant even when the slip changes either due to the load or the fault. On the other hand, the increase in the sideband amplitude can be observed in both the current and voltage signals under the sensorless control mode with the voltage spectrum demonstrating a slightly better performance than the motor current spectrum, because the VSD regulates the voltage to adapt changes in the electromagnetic torque caused by the faults. The comparative results between current and voltage spectra under both control modes show that the sensorless control gives more reliable diagnosis. In order to monitor the condition of electrical drives accuratly and effectively, demodulation analysis such as modulation signal bispectrum (MSB) of the electrical signals from the VSDs has been explored extensively in this thesis to detect and diagnose different motor faults. MSB analysis has been shown to provide good noise reduction, and more accurate and reliable diagnosis. It gives a more correct indication of the fault severity and fault location for all operating conditions. This study also examines detecting and diagnosing the effect of an asymmetric stator winding combined with broken rotor bar (BRB) faults under the sensorless operation mode. It examines the effectiveness of conventional diagnostic…

Subjects/Keywords: TA Engineering (General). Civil engineering (General)

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Shaeboub, A. (2018). The Monitoring of Induction Machines Using Electrical Signals from the Variable Speed Drive. (Doctoral Dissertation). University of Huddersfield. Retrieved from http://eprints.hud.ac.uk/id/eprint/34555/1/Abdulkarim%20Shaeboub%20FINAL%20THESIS.PDF

Chicago Manual of Style (16^th Edition):

Shaeboub, Abdulkarim. “The Monitoring of Induction Machines Using Electrical Signals from the Variable Speed Drive.” 2018. Doctoral Dissertation, University of Huddersfield. Accessed March 01, 2021. http://eprints.hud.ac.uk/id/eprint/34555/1/Abdulkarim%20Shaeboub%20FINAL%20THESIS.PDF.

MLA Handbook (7^th Edition):

Shaeboub, Abdulkarim. “The Monitoring of Induction Machines Using Electrical Signals from the Variable Speed Drive.” 2018. Web. 01 Mar 2021.

Vancouver:

Shaeboub A. The Monitoring of Induction Machines Using Electrical Signals from the Variable Speed Drive. [Internet] [Doctoral dissertation]. University of Huddersfield; 2018. [cited 2021 Mar 01]. Available from: http://eprints.hud.ac.uk/id/eprint/34555/1/Abdulkarim%20Shaeboub%20FINAL%20THESIS.PDF.

Council of Science Editors:

Shaeboub A. The Monitoring of Induction Machines Using Electrical Signals from the Variable Speed Drive. [Doctoral Dissertation]. University of Huddersfield; 2018. Available from: http://eprints.hud.ac.uk/id/eprint/34555/1/Abdulkarim%20Shaeboub%20FINAL%20THESIS.PDF

University of Huddersfield

23. Zainal Abidin, Nurul Afroze. Resilience of Malaysian Public Sector Construction Industry to Supply Chain Disruptions.

Degree: 2018, University of Huddersfield

URL: http://eprints.hud.ac.uk/id/eprint/34602/1/Nurul%20Zainal%20Abidin%20FINAL%20THESIS.PDF

► The uncertainty and complexity of the interdependent global economy have amplified collective exposure of supply chains to disruptive events. In the construction world, the fragmented… (more)

▼ The uncertainty and complexity of the interdependent global economy have amplified collective exposure of supply chains to disruptive events. In the construction world, the fragmented nature of the temporary project teams and the uncertain operating environment make construction supply chains more vulnerable to these disruptive events. In Malaysia, the construction industry has become the focal point for development through the Government’s “Malaysia Vision 2020” transformation programme, in the effort to become a developed country by the year 2020. However, despite good plans for the development of public projects, the Malaysian Auditor General Report 2014 identified several weaknesses in the delivery of construction projects that caused poor project performance. The dynamics and effects of interconnected risks among construction organisations tend to be overlooked across the Malaysian public project supply chains, making them highly vulnerable to supply chain disruptions. This calls for the need to go beyond the traditional silo approach of the risk management process. This research aims to investigate the Malaysian public sector supply chain’s resilience capabilities and vulnerabilities in handling disruptions in the effort to build supply chain resilience against disruptions and improve the delivery of public projects. A comprehensive questionnaire survey was conducted with 105 construction professionals from two groups of respondents, the public and private organisations in the public sector supply chain to identify their current vulnerabilities and capabilities. Data were analysed using descriptive statistics and compared using the Mann-Whitney U and Kruskal-Wallis tests. The findings revealed that the public organisations faced significantly higher political threats whilst the private organisations faced significant market pressures. Subsequent semistructured interviews were conducted with 12 professionals in the field to identify the inherent pathogens that make the supply chain highly vulnerable in these critical areas. The emergent pathogenic influences include practice, circumstance, convention, organisation and behavior. Finally, a resilience response framework was developed based on the triangulation of these results. The framework allows the experts from the public sector supply chain to understand the critical vulnerabilities and pathogenic influences of their organisation and their supply chain members, along with the set of capabilities to reduce the disruptive impacts arising from these critical vulnerabilities.

Subjects/Keywords: TA Engineering (General). Civil engineering (General)

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Zainal Abidin, N. A. (2018). Resilience of Malaysian Public Sector Construction Industry to Supply Chain Disruptions. (Doctoral Dissertation). University of Huddersfield. Retrieved from http://eprints.hud.ac.uk/id/eprint/34602/1/Nurul%20Zainal%20Abidin%20FINAL%20THESIS.PDF

Chicago Manual of Style (16^th Edition):

Zainal Abidin, Nurul Afroze. “Resilience of Malaysian Public Sector Construction Industry to Supply Chain Disruptions.” 2018. Doctoral Dissertation, University of Huddersfield. Accessed March 01, 2021. http://eprints.hud.ac.uk/id/eprint/34602/1/Nurul%20Zainal%20Abidin%20FINAL%20THESIS.PDF.

MLA Handbook (7^th Edition):

Zainal Abidin, Nurul Afroze. “Resilience of Malaysian Public Sector Construction Industry to Supply Chain Disruptions.” 2018. Web. 01 Mar 2021.

Vancouver:

Zainal Abidin NA. Resilience of Malaysian Public Sector Construction Industry to Supply Chain Disruptions. [Internet] [Doctoral dissertation]. University of Huddersfield; 2018. [cited 2021 Mar 01]. Available from: http://eprints.hud.ac.uk/id/eprint/34602/1/Nurul%20Zainal%20Abidin%20FINAL%20THESIS.PDF.

Council of Science Editors:

Zainal Abidin NA. Resilience of Malaysian Public Sector Construction Industry to Supply Chain Disruptions. [Doctoral Dissertation]. University of Huddersfield; 2018. Available from: http://eprints.hud.ac.uk/id/eprint/34602/1/Nurul%20Zainal%20Abidin%20FINAL%20THESIS.PDF

University of Huddersfield

24. Brennan, James K. Algorithms for Surface Texture Profiles and Parameters.

Degree: 2010, University of Huddersfield

URL: http://eprints.hud.ac.uk/id/eprint/8759/1/jkbrennanfinalthesis.pdf

► This thesis is concerned with the development of algorithms for the reliable calculation of surface texture profile parameters published by the International Organisation for Standardisation… (more)

Subjects/Keywords: TA Engineering (General). Civil engineering (General)

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APA (6^th Edition):

Brennan, J. K. (2010). Algorithms for Surface Texture Profiles and Parameters. (Doctoral Dissertation). University of Huddersfield. Retrieved from http://eprints.hud.ac.uk/id/eprint/8759/1/jkbrennanfinalthesis.pdf

Chicago Manual of Style (16^th Edition):

Brennan, James K. “Algorithms for Surface Texture Profiles and Parameters.” 2010. Doctoral Dissertation, University of Huddersfield. Accessed March 01, 2021. http://eprints.hud.ac.uk/id/eprint/8759/1/jkbrennanfinalthesis.pdf.

MLA Handbook (7^th Edition):

Brennan, James K. “Algorithms for Surface Texture Profiles and Parameters.” 2010. Web. 01 Mar 2021.

Vancouver:

Brennan JK. Algorithms for Surface Texture Profiles and Parameters. [Internet] [Doctoral dissertation]. University of Huddersfield; 2010. [cited 2021 Mar 01]. Available from: http://eprints.hud.ac.uk/id/eprint/8759/1/jkbrennanfinalthesis.pdf.

Council of Science Editors:

Brennan JK. Algorithms for Surface Texture Profiles and Parameters. [Doctoral Dissertation]. University of Huddersfield; 2010. Available from: http://eprints.hud.ac.uk/id/eprint/8759/1/jkbrennanfinalthesis.pdf

University of Huddersfield

25. Lu, Wenlong. Modelling the Integration between the Design and Inspection Process of Geometrical Specifications for Digital Manufacturing.

Degree: 2011, University of Huddersfield

URL: http://eprints.hud.ac.uk/id/eprint/14054/1/wlufinalthesis.pdf

► Geometrical Product Specifications (GPS) is a technical language which covers the standardization for micro/macro- geometry specifications. In today’s environment of globalization, out-sourcing and sub-contracting is… (more)

▼ Geometrical Product Specifications (GPS) is a technical language which covers the standardization for micro/macro- geometry specifications. In today’s environment of globalization, out-sourcing and sub-contracting is increasing. Geometrical specifications of a product need to be detailed to a degree where nothing is left open to interpretation. To fulfil this, and to meet the requirements of digital manufacturing, it is necessary to integrate the design and inspection process of a geometrical specification. At the technical level, many functional operator/operations are employed in a geometrical specification. These functional operators/operations are based on rigorous mathematics, and they are intricately related and inconvenient to be used directly. Consequently, it is of practical utility to build an integrated information system to encapsulate and manage the information involved in GPS. This thesis focuses on geometrical tolerancing, including form/orientation/ location tolerancing, and its integrated geometry information system. The main contributions are: Firstly, a global data expression for modelling the integration between the design and inspection process of a geometrical tolerance is presented based on category theory. The categorical data model represents, stores and manipulates all the elements and their relationships involved in design and inspection process of a geometrical tolerance, by categories, objects and morphisms, flexibly; the relationships between objects were refined by pull back structures; and the manipulations of the model such as query and closure of query are realized successfully by functor structures in category theory. Secondly, different categories of knowledge rules have been established to enhance the rationality and the intellectuality of the integrated geometry information system, such as the rules for the application of geometrical requirement, tolerance type, datum and datum reference framework and, for the refinement among geometrical specifications. Finally, the host system for drawing indication of geometrical tolerances in the framework of GPS was established based on AutoCAD 2007 using ObjectARX.

Subjects/Keywords: TA Engineering (General). Civil engineering (General)

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Lu, W. (2011). Modelling the Integration between the Design and Inspection Process of Geometrical Specifications for Digital Manufacturing. (Doctoral Dissertation). University of Huddersfield. Retrieved from http://eprints.hud.ac.uk/id/eprint/14054/1/wlufinalthesis.pdf

Chicago Manual of Style (16^th Edition):

Lu, Wenlong. “Modelling the Integration between the Design and Inspection Process of Geometrical Specifications for Digital Manufacturing.” 2011. Doctoral Dissertation, University of Huddersfield. Accessed March 01, 2021. http://eprints.hud.ac.uk/id/eprint/14054/1/wlufinalthesis.pdf.

MLA Handbook (7^th Edition):

Lu, Wenlong. “Modelling the Integration between the Design and Inspection Process of Geometrical Specifications for Digital Manufacturing.” 2011. Web. 01 Mar 2021.

Vancouver:

Lu W. Modelling the Integration between the Design and Inspection Process of Geometrical Specifications for Digital Manufacturing. [Internet] [Doctoral dissertation]. University of Huddersfield; 2011. [cited 2021 Mar 01]. Available from: http://eprints.hud.ac.uk/id/eprint/14054/1/wlufinalthesis.pdf.

Council of Science Editors:

Lu W. Modelling the Integration between the Design and Inspection Process of Geometrical Specifications for Digital Manufacturing. [Doctoral Dissertation]. University of Huddersfield; 2011. Available from: http://eprints.hud.ac.uk/id/eprint/14054/1/wlufinalthesis.pdf

University of Huddersfield

26. Charlton, Phillip. The Application of Zeeko Polishing Technology to Freeform Femoral Knee Replacement Component Manufacture.

Degree: 2011, University of Huddersfield

URL: http://eprints.hud.ac.uk/id/eprint/14062/1/Mr_Phillip_Charlton_PhD_Thesis_June_2011.pdf

► The purpose of this study was to develop an advanced 7-axis Computer Numerical Controlled (CNC) Polishing Machine from its successful original application of industrial optics… (more)

▼ The purpose of this study was to develop an advanced 7-axis Computer Numerical Controlled (CNC) Polishing Machine from its successful original application of industrial optics manufacture into a process for the manufacture of femoral knee components to improve wear characteristics and prolong component lifetimes. It was indentified that the successful manufacture of optical components using a corrective polishing procedure to enhance their performance could be applied to femoral knee implant components. Current femoral knee implants mimic the natural shape of the joint and are freeform (no axis of symmetry) in nature hence an advanced CNC polishing machine that can follow the contours associated with such shapes could improve surface finish and conformity of replacement femoral knee bearing surfaces, leading to improved performance. The process involved generating machine parameters that would optimize the polishing procedure to minimize wear of materials used in femoral knee implant manufacture. Secondly a design of a Non-Uniform Refind B-Spline (NURBS) model for control of the Polishing Machine over the freeform contours of the femoral component. Completing the process involved development of a corrective polishing process that would improve form control of the components. Such developments would improve surface finish and conformity which are well documented contributors to wear and hence the lifeline of orthopaedic implants. By the means of comparison of this technique to that of a conventional finishing technique using pin-on-plate disc testing it was concluded that performance of the CNC polished components was an improvement on that of the conventional technique. In the case of form control their were slight indications through small decreases in peak to valley (PV) error that the process helped reduce form error and could increase the lifetime of femoral knee replacement components. The overall study provided results that indicate the the Zeeko process could be used in the application of polishing of hard-on-hard material combinations to improve form control without compromising surface finish hence improving lifetimes of the implant. The results have their limitations in the fact that the wear test performance was only carried out on orthopaedic implant materials using a pin-on-plate wear test rig. Due to the time limitations on the thesis it can be said that further analysis of correcting form without compromising surface finish on entire implant systems under full joint simulator testing which would provide mre realistic contitions would a more definitive answer be achieved.

Subjects/Keywords: TA Engineering (General). Civil engineering (General)

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Charlton, P. (2011). The Application of Zeeko Polishing Technology to Freeform Femoral Knee Replacement Component Manufacture. (Doctoral Dissertation). University of Huddersfield. Retrieved from http://eprints.hud.ac.uk/id/eprint/14062/1/Mr_Phillip_Charlton_PhD_Thesis_June_2011.pdf

Chicago Manual of Style (16^th Edition):

Charlton, Phillip. “The Application of Zeeko Polishing Technology to Freeform Femoral Knee Replacement Component Manufacture.” 2011. Doctoral Dissertation, University of Huddersfield. Accessed March 01, 2021. http://eprints.hud.ac.uk/id/eprint/14062/1/Mr_Phillip_Charlton_PhD_Thesis_June_2011.pdf.

MLA Handbook (7^th Edition):

Charlton, Phillip. “The Application of Zeeko Polishing Technology to Freeform Femoral Knee Replacement Component Manufacture.” 2011. Web. 01 Mar 2021.

Vancouver:

Charlton P. The Application of Zeeko Polishing Technology to Freeform Femoral Knee Replacement Component Manufacture. [Internet] [Doctoral dissertation]. University of Huddersfield; 2011. [cited 2021 Mar 01]. Available from: http://eprints.hud.ac.uk/id/eprint/14062/1/Mr_Phillip_Charlton_PhD_Thesis_June_2011.pdf.

Council of Science Editors:

Charlton P. The Application of Zeeko Polishing Technology to Freeform Femoral Knee Replacement Component Manufacture. [Doctoral Dissertation]. University of Huddersfield; 2011. Available from: http://eprints.hud.ac.uk/id/eprint/14062/1/Mr_Phillip_Charlton_PhD_Thesis_June_2011.pdf

University of Huddersfield

27. Abuhabaya, Abdullah. Investigation of engine performance and exhaust gas emissions by using bio-diesel in compression ignition engine and optimisation of bio-diesel production from feedstock by using response surface methodology.

Degree: 2012, University of Huddersfield

URL: http://eprints.hud.ac.uk/id/eprint/14064/1/Abdullah_Abuhabaya_-_Final_Thesis.pdf

► Bio-diesel, derived from the transesterification of vegetable oils or animal fats with simple alcohols, has attracted more and more attention recently. As a cleaner burning… (more)

▼ Bio-diesel, derived from the transesterification of vegetable oils or animal fats with simple alcohols, has attracted more and more attention recently. As a cleaner burning diesel alternative, bio-diesel claims to have many attractive features including: biodegradability, nontoxicity, renewability and low emission profiles. Free fatty acid (FFA) esterification and triglyceride (TG) transesterification with low alcohols molar ratio are the central reactions for the bio-diesel production. This study presents an experimental investigation into the effects of running biodiesel fuel and its blends on conventional diesel engines. Bio-fuels provide a way to produce fuels without redesigning any of the engine technology present today, yet allowing for green house emissions to decrease. Bio-diesel is one of these types of emerging bio-fuels, which has an immediate alternative fuel, while providing a decrease in green house gas emissions, as well as a solution to recycling used Waste Vegetable Oils which are otherwise disposed. This study shows how by blending bio-diesel with petroleum diesel at intervals of B5, B10, B15, and B20 decrease green house gas emissions significantly while maintaining similar performance output and efficiency with respect to 100% petroleum diesel. The focus of this research is to optimize the biodiesel production from crude sunflower oil. The effect of variables including methanol/oil molar ratio, NaOH catalyst concentration, reaction time, reaction temperature, and rate of mixing on the bio-diesel yield was examined and optimized by response surface methodology (RSM). Besides, a second-order model was deduced to predict the biodiesel yield. Confirmation experiment was further conducted, validating the efficacy of the model. Transesterification of sunflower oil was carried out using low molecular weight alcohols and sodium hydroxide. For sunflower oil, a central composite design with eight factorial, six center and six axial points was used to study the effect of catalyst concentration, molar ratio of methanol to sunflower oil and reaction temperature on percentage yield of the biodiesel. Catalyst concentration and molar ratio of methanol to sunflower oil were the most influential variables affecting percentage conversion and percentage initial absorbance. Maximum percentage yield of 95 % is predicted at a catalyst concentration of 1.1 % (wt/wt) and methanol to sunflower oil molar ratio of 6.8:1 at reaction time of 66 min and temperature of 35°C. In general, the sunflower oil biodiesel exhibited friendly environmental benefits and acceptable stability, demonstrating its feasibility as an alternative fuel.

Subjects/Keywords: TA Engineering (General). Civil engineering (General)

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Abuhabaya, A. (2012). Investigation of engine performance and exhaust gas emissions by using bio-diesel in compression ignition engine and optimisation of bio-diesel production from feedstock by using response surface methodology. (Doctoral Dissertation). University of Huddersfield. Retrieved from http://eprints.hud.ac.uk/id/eprint/14064/1/Abdullah_Abuhabaya_-_Final_Thesis.pdf

Chicago Manual of Style (16^th Edition):

Abuhabaya, Abdullah. “Investigation of engine performance and exhaust gas emissions by using bio-diesel in compression ignition engine and optimisation of bio-diesel production from feedstock by using response surface methodology.” 2012. Doctoral Dissertation, University of Huddersfield. Accessed March 01, 2021. http://eprints.hud.ac.uk/id/eprint/14064/1/Abdullah_Abuhabaya_-_Final_Thesis.pdf.

MLA Handbook (7^th Edition):

Abuhabaya, Abdullah. “Investigation of engine performance and exhaust gas emissions by using bio-diesel in compression ignition engine and optimisation of bio-diesel production from feedstock by using response surface methodology.” 2012. Web. 01 Mar 2021.

Vancouver:

Abuhabaya A. Investigation of engine performance and exhaust gas emissions by using bio-diesel in compression ignition engine and optimisation of bio-diesel production from feedstock by using response surface methodology. [Internet] [Doctoral dissertation]. University of Huddersfield; 2012. [cited 2021 Mar 01]. Available from: http://eprints.hud.ac.uk/id/eprint/14064/1/Abdullah_Abuhabaya_-_Final_Thesis.pdf.

Council of Science Editors:

Abuhabaya A. Investigation of engine performance and exhaust gas emissions by using bio-diesel in compression ignition engine and optimisation of bio-diesel production from feedstock by using response surface methodology. [Doctoral Dissertation]. University of Huddersfield; 2012. Available from: http://eprints.hud.ac.uk/id/eprint/14064/1/Abdullah_Abuhabaya_-_Final_Thesis.pdf

University of Huddersfield

28. Alaiwi, Ayman Ahmed. The Design and Investigation of an Extremely Low Frequency (ELF) Transmission Data Link.

Degree: 2013, University of Huddersfield

URL: http://eprints.hud.ac.uk/id/eprint/19029/1/A._Alaiwi_u0563838_Thesis_July_2013_final.pdf

► The telecommunication engineering field is playing a big role in the technology revolution, with most new technologies, smart phones and computers etc requiring 3G internet… (more)

▼ The telecommunication engineering field is playing a big role in the technology revolution, with most new technologies, smart phones and computers etc requiring 3G internet connection to be constantly in communication worldwide. A high spectral efficiency spectrum and maximising the number of users and transmission rate within a frequency band are the most critical design objectives and challenge to improve the reliability and performance of wireless communications systems. The use of the Extremely Low Frequency (ELF) band has largely been confined to submerged submarine communications and its application to civilian data transmission has been neglected. ELF signals propagate through the ground itself using earth rods for long distances without regeneration compared to Radio Frequency (RF). There are two major noise sources in the ELF band, namely flicker noise (1/f) and 50Hz radiation of power feed cables underground. This thesis has described the theoretical aspects of adopting the ELF band and the ground itself as transmission medium in a communication link based on Orthogonal Frequency Division Multiplex (OFDM scheme. The use of 16-Quadrature Amplitude Modulation (16-QAM) and OFDM in ELF link enhances the transmission capacity at such low frequencies and reduces the multi-path interference. The link could handle at least 1000 bit/s (bps) and replace the complexity and reduces the power needed for RF link in some applications. This thesis investigated the practical implementations of Binary Amplitude Shift Keying(BASK), 8-Phase Shift Keying (8-PSK) and 16-QAM with 20 Hz carrier and a data rate of 4 symbols/s from context to practice using Field Programmable Gate Array (FPGA). The highly flexible nature of FPGAs allows the systems designers to integrate any signal processing function. FPGAs replace the use of Digital Signal Processing (DSP) processors in many applications. Very high speed circuit Hardware Description Language (VHDL) language, Matlab, Altera DSP Builder and Altera Quartus II were used to design the ELF link. A thorough literature review showed that demodulating phase data is generally performed using carrier recovery. The current technology generally incorporates a complex mathematics ‘tan’ function and Costas loop to detect the phase changes of the 8-PSK and 16-QAM signals. The 8-PSK and 16-QAM are widely used in Wide-band Code Division Multiple Access (WCDMA), High-Speed Download Packet Access (HSDPA), World wide Inter-operability for Microwave Access (WiMAX) and Wireless Local Area Network (WLAN) Broadband wireless access technologies. Alternative method has been proposed to use cross correlation to detect the phase modulated data. Patent literature review showed that there is no such patent or known prior art related to the proposed technique. This novel technique does not extract the carrier for demodulation purposes and offer improved phase detection performance as well as superior resistance to Additive-White-Gaussian-Noise (AWGN) compared to a carrier recovery scheme operating at…

Subjects/Keywords: TA Engineering (General). Civil engineering (General)

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Alaiwi, A. A. (2013). The Design and Investigation of an Extremely Low Frequency (ELF) Transmission Data Link. (Doctoral Dissertation). University of Huddersfield. Retrieved from http://eprints.hud.ac.uk/id/eprint/19029/1/A._Alaiwi_u0563838_Thesis_July_2013_final.pdf

Chicago Manual of Style (16^th Edition):

Alaiwi, Ayman Ahmed. “The Design and Investigation of an Extremely Low Frequency (ELF) Transmission Data Link.” 2013. Doctoral Dissertation, University of Huddersfield. Accessed March 01, 2021. http://eprints.hud.ac.uk/id/eprint/19029/1/A._Alaiwi_u0563838_Thesis_July_2013_final.pdf.

MLA Handbook (7^th Edition):

Alaiwi, Ayman Ahmed. “The Design and Investigation of an Extremely Low Frequency (ELF) Transmission Data Link.” 2013. Web. 01 Mar 2021.

Vancouver:

Alaiwi AA. The Design and Investigation of an Extremely Low Frequency (ELF) Transmission Data Link. [Internet] [Doctoral dissertation]. University of Huddersfield; 2013. [cited 2021 Mar 01]. Available from: http://eprints.hud.ac.uk/id/eprint/19029/1/A._Alaiwi_u0563838_Thesis_July_2013_final.pdf.

Council of Science Editors:

Alaiwi AA. The Design and Investigation of an Extremely Low Frequency (ELF) Transmission Data Link. [Doctoral Dissertation]. University of Huddersfield; 2013. Available from: http://eprints.hud.ac.uk/id/eprint/19029/1/A._Alaiwi_u0563838_Thesis_July_2013_final.pdf

University of Huddersfield

29. Park, Kyooseon. Optimal Design of a Micro Vertical Axis Wind Turbine for Sustainable Urban Environment.

Degree: 2013, University of Huddersfield

URL: http://eprints.hud.ac.uk/id/eprint/19032/1/Kyoo-seon_Park_-_Final_Thesis.pdf

► The need for sustainable energy sources becomes greater each year due to the continued depletion of fossil fuels and the resulting energy crisis. Solutions to… (more)

▼ The need for sustainable energy sources becomes greater each year due to the continued depletion of fossil fuels and the resulting energy crisis. Solutions to this problem are potentially in the form of wind turbines, for sustainable urban environment, that have been receiving increased support. At present, a number of wind turbines have been developed that show significant increase in performance compared to existing technologies. From an extensive literature review, a number of key issues have been highlighted which are concerned with the design, optimisation and diagnostics of Vertical Axis Wind Turbines (VAWTs) that have been used to formulate the scope of this research. A design procedure for a vertical axis wind turbine, that features both multi-blade rotor and fixed outer stator guide vanes, has been derived, in which both rotor and stator blade profiles have been generated for a low wind speed application. In the presented work, numerical investigations have been carried out extensively to determine the optimised design of the VAWT. Sliding mesh technique has been used for the rotation of rotor blades. This new technique captures the transient flow phenomena that occur when the rotor and the stator blades interact with each other. Hence, the results predicted by CFD using this technique are much superior in accuracy. Furthermore, a detailed flow field analysis of the VAWT has highlighted large asymmetries in both pressure and flow velocity about the central axis of the VAWT in both the stationary and the rotating frames of references. Various geometric parameters associated with the design of the VAWT have been investigated over a wide range in order to analyse the effect of these parameters on the performance output of the VAWT. These geometric parameters are the blade angles, the number of blades in the VAWT and the size of the rotor/stator sections of the VAWT. It has been shown that all these parameters considerably affect the performance output of the VAWT and hence have been optimised in the present study for maximum performance output of the VAWT. One of the key elements of this study is the development of a performance prediction model of the VAWT that takes into account the effects of the aforementioned geometric parameters of the VAWT. This novel prediction model is both robust, user-friendly and has shown to predict the performance output of the VAWT with reasonable accuracy. Hence, the prediction model can be used by the designers of the VAWT. Nowadays, condition based health monitoring of mechanical systems is topic of vast research. Most of the studies in this field use experimental facilities and conventional toolboxes to handle the output data from the sensors. With the advent of advanced CFD tools, it has now become possible to use CFD as an effective tool for fault detection in VAWTs. An attempt has been presented in this study regarding condition monitoring of VAWTs for sustainable urban environment. Various faults like missing blade and slits in blade have been investigated and…

Subjects/Keywords: TA Engineering (General). Civil engineering (General)

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Park, K. (2013). Optimal Design of a Micro Vertical Axis Wind Turbine for Sustainable Urban Environment. (Doctoral Dissertation). University of Huddersfield. Retrieved from http://eprints.hud.ac.uk/id/eprint/19032/1/Kyoo-seon_Park_-_Final_Thesis.pdf

Chicago Manual of Style (16^th Edition):

Park, Kyooseon. “Optimal Design of a Micro Vertical Axis Wind Turbine for Sustainable Urban Environment.” 2013. Doctoral Dissertation, University of Huddersfield. Accessed March 01, 2021. http://eprints.hud.ac.uk/id/eprint/19032/1/Kyoo-seon_Park_-_Final_Thesis.pdf.

MLA Handbook (7^th Edition):

Park, Kyooseon. “Optimal Design of a Micro Vertical Axis Wind Turbine for Sustainable Urban Environment.” 2013. Web. 01 Mar 2021.

Vancouver:

Park K. Optimal Design of a Micro Vertical Axis Wind Turbine for Sustainable Urban Environment. [Internet] [Doctoral dissertation]. University of Huddersfield; 2013. [cited 2021 Mar 01]. Available from: http://eprints.hud.ac.uk/id/eprint/19032/1/Kyoo-seon_Park_-_Final_Thesis.pdf.

Council of Science Editors:

Park K. Optimal Design of a Micro Vertical Axis Wind Turbine for Sustainable Urban Environment. [Doctoral Dissertation]. University of Huddersfield; 2013. Available from: http://eprints.hud.ac.uk/id/eprint/19032/1/Kyoo-seon_Park_-_Final_Thesis.pdf

University of Huddersfield

30. Raharjo, Parno. An Investigation of Surface Vibration, Airbourne Sound and Acoustic Emission Characteristics of a Journal Bearing for Early Fault Detection and Diagnosis.

Degree: 2013, University of Huddersfield

URL: http://eprints.hud.ac.uk/id/eprint/19034/1/Final_Thesis_Sept_2013.pdf

► High power machinery such as steam turbines, large pumps and motors often use journal bearings as rotor supports. This type of bearing is simple, low… (more)

▼ High power machinery such as steam turbines, large pumps and motors often use journal bearings as rotor supports. This type of bearing is simple, low cost and with high load carrying capacity. However, abnormal operating conditions in the journal bearings will degrade machine performance, increase operating cost and may cause unexpected sudden failure which is dangerous in both engineering and safety terms. Bearing condition monitoring can detect faults at an early stage and prevent the occurrence of such failures which can be catastrophic. Monitoring techniques that have been used for monitoring of journal bearing are lubricant analysis, vibration analysis, noise and acoustic emission analysis. Lubricant analysis has been used effectively for condition monitoring for a long time but cannot be implemented in real time. Many researchers have studied the use of the vibration and sound signals and acoustic emissions generated by the hydrodynamic journal bearing for detecting and diagnosing faults. The studies give relatively little information regarding surface vibration and airborne sound characteristics for self-aligning spherical journal bearings, nor has comprehensive condition monitoring been implemented for a particular self-aligning spherical bearing journal. Surface vibration, airborne sound analysis and acoustic emission monitoring can be used simultaneously to detect any signal emitted from the bearing at very wide frequency range. Sound vibration occurs in solid structure, liquid and gases transmitted to air surrounding create airborne sound. This study has conducted a thorough review of theoretical and experimental studies. The research began with designing and building a test rig consisting of a drive system, radial loading system, torsion loading system, the bearing testing system itself and control, data acquisition and measurement instrumentation systems include encoder, pressure transducers, thermocouples, load cells, vibration transducer, acoustic and acoustic emission sensors. Preliminary experiments were conducted to ensure all equipment and instrumentation worked well and also to test measurement repeatability. Preliminary experiment results showed that all the equipment either driving, loading, data acquisition and measurement system works well. Experimental analysis of the surface vibration, airborne sound and acoustic emission analysis responses in time domain and frequency domain analysis include RMS value, Kurtosis and mean value showed good repeatability. The AE measurement response showed the best repeatability, followed by surface vibration and airborne response. Theoretical study shows that the self-aligning spherical journal bearing system under radial load generated surface vibration, airborne sound and acoustic emission responses that originated from external force excitation such as fluctuating loads due to system misalignment or unbalance and internal excitation such as asperity in boundary or mixed operation. These excitations generate structure-borne vibration…

Subjects/Keywords: TA Engineering (General). Civil engineering (General)

Record Details Similar Records Cite « Share

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Raharjo, P. (2013). An Investigation of Surface Vibration, Airbourne Sound and Acoustic Emission Characteristics of a Journal Bearing for Early Fault Detection and Diagnosis. (Doctoral Dissertation). University of Huddersfield. Retrieved from http://eprints.hud.ac.uk/id/eprint/19034/1/Final_Thesis_Sept_2013.pdf

Chicago Manual of Style (16^th Edition):

Raharjo, Parno. “An Investigation of Surface Vibration, Airbourne Sound and Acoustic Emission Characteristics of a Journal Bearing for Early Fault Detection and Diagnosis.” 2013. Doctoral Dissertation, University of Huddersfield. Accessed March 01, 2021. http://eprints.hud.ac.uk/id/eprint/19034/1/Final_Thesis_Sept_2013.pdf.

MLA Handbook (7^th Edition):

Raharjo, Parno. “An Investigation of Surface Vibration, Airbourne Sound and Acoustic Emission Characteristics of a Journal Bearing for Early Fault Detection and Diagnosis.” 2013. Web. 01 Mar 2021.

Vancouver:

Raharjo P. An Investigation of Surface Vibration, Airbourne Sound and Acoustic Emission Characteristics of a Journal Bearing for Early Fault Detection and Diagnosis. [Internet] [Doctoral dissertation]. University of Huddersfield; 2013. [cited 2021 Mar 01]. Available from: http://eprints.hud.ac.uk/id/eprint/19034/1/Final_Thesis_Sept_2013.pdf.

Council of Science Editors:

Raharjo P. An Investigation of Surface Vibration, Airbourne Sound and Acoustic Emission Characteristics of a Journal Bearing for Early Fault Detection and Diagnosis. [Doctoral Dissertation]. University of Huddersfield; 2013. Available from: http://eprints.hud.ac.uk/id/eprint/19034/1/Final_Thesis_Sept_2013.pdf

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