Engineering Commons^™

Synthesis And Characterization Of Crosslinked Urethane Doped Polyesters For Vascular Tissue Engineering, Jagannath Dey

Bioengineering Theses - Archive

Traditional crosslinked polyester elastomers are inherently weak, and the strategy of increasing crosslink density to improve their mechanical properties makes them brittle materials. Biodegradable polyurethanes, although strong and elastic, do not fare well in dynamic environments due to the onset of permanent deformation. The design and development of a soft, strong and completely elastic (100% recovery from deformation) material for tissue engineering still remains a challenge. Herein, we report the synthesis and evaluation of a new class of biodegradable elastomers, crosslinked polyurethane-doped polyesters (CUPEs), which is able to satisfy the need for soft, strong, and elastic biomaterials. Tensile strength of …

Development Of Novel Multilayered Particles For Drug Delivery And Cell Isolation Applications, Bhanuprasanth Koppolu

Bioengineering Theses - Archive

The objective of this work is to develop multilayered nanoparticles for drug delivery and cell isolation applications. These particles principally consist of three layers; biodegradable polymer, thermo sensitive polymer and magnetic materials. For drug delivery, multilayered nanoparticles (MLNP) consisting of a magnetic core and two encompassing shells made up of temperature sensitive polymer, poly (N-isopropylacrylamide) (PNIPAAm), and biodegradable polymer, poly(D, L lactide-co-glycolide) (PLGA), were developed for targeted and controlled drug delivery. The PNIPAAm layer was immobilized onto magnetic nanoparticles (MNPs) via a silane coupling agent, Vinyltrimethoxysilane (VTMS), and free radical polymerization. These particles were then encapsulated with PLGA using a …

Test 1941: John Deere 9330 Diesel, Nebraska Tractor Test Lab

Nebraska Tractor Tests

ABOUT THE TEST REPORT AND USE OF THE DATA The test data contained in this report are a tabulation of the results of a series of tests. Due to the restricted format of these pages, only a limited amount of data and not all of the tractor specifications are included. The full OECD report contains usually about 30 pages of data and specifications. The test data were obtained for each tractor under similar conditions and therefore, provide a means of comparison of performance based on a limited set of reported data. EXPLANATION OF THE TEST PROCEDURES Purpose The purpose of …

Noise Abatement And Night Deliveries, Hugh Finlay

Masters

ABSTRACT The hypothesis is tested that – Acoustic materials are available or can be developed and applied to Heavy Goods Vehicles and ancillaries, which effectively and economically abate the noise caused by night deliveries The MPhil is a part of a wider innovation research partnership that aimed to develop sustainable solutions for the growing trend to night deliveries in Dublin city centre. The methodology involves; a review of international best practice for urban traffic noise abatement: a social and commercial justification for developing low noise products and procedures: field trials of kerb-side deliveries to city centre shops to identify the …

Multiple-Input Multiple-Output Rayleigh Flat Fading Outage Capacity Using Channel Estimation, Chris G. Potter, Kurt Louis Kosbar, Adam Panagos

Electrical and Computer Engineering Faculty Research & Creative Works

Upper and lower bounds on the outage capacity for a multiple-input multiple-output (MIMO) Rayleigh flat fading wireless baseband communication environment are derived for the case when the channel is completely unknown at the transmitter and the receiver has access to channel state information (CSI) via pilot estimation. The bounds show that the channel estimation error significantly impacts the outage capacity. A change in the outage probability is also shown to have a larger impact on the outage capacity when the channel estimation error is small. To get an idea of how these bounds are affected by a temporally correlated channel, …

A Precision Instrument For Research Into Nanolithographic Techniques Using Field-Emitted Electron Beams, King-Fu Hii

University of Kentucky Doctoral Dissertations

Nanomanufacturing is an active research area in academia and industry due to the ever-growing demands for precision surface modifications of thin films or substrates with nanoscale features. Conventional lithographic techniques face many challenges as they approach their fundamental limits. Consequently, new nanomanufacturing tools, fabrication techniques, and precision instruments are being explored and developed to meet these challenges. It has been hypothesized that direct-write nanolithography might be achieved by using a field-emitted electron beam for nanomachining. This dissertation moves this research one step closer by developing a precision instrument that can enable the integration of direct-write nanolithography by a field-emitted electron …

A Study And Development Of Temperature And Relative Humidity Control System In Hospital Buildings In Thailand, Thammanoon Sookchaiya, Veerapol Monyakul, Sirichai Thepa

EDU-COM International Conference

This research was aimed to control thermal environment (temperature and relative humidity) in airconditioned rooms in order to reach thermal comfort and good health for the people in hospital. This research was divided into 2 sections: Section 1 studies the direct and indirect influence of relative humidity on the health of people inside hospital buildings and the appropriate relative humidity and temperature to achieve thermal comfort and good health for Thailand by using Delphi technique; Section 2 develops single phase air conditioning system using inverter to control thermal environment (temperature and relative humidity) inside the room to reach the appropriate …

Microstructured Arrayed Microfluidic Waveguide Structure For Infrared Radiation Focusing And Transfer, Paul B. Laursen, Kamal Alameh, Mikhail Vasiliev, Nicholas C. Elliot

ECU Presentations

No abstract provided.

Nanostructured Engineered Materials With High Magneto-Optic Performance For Integrated Photonics Applications, Mikhail Vasiliev, Kamal Alameh, Viacheslav Kotov, Yong-Tak Lee

ECU Presentations

No abstract provided.

Table Of Contents

Journal of Digital Forensics, Security and Law

No abstract provided.

Who Is Reading The Data On Your Old Computer?, Vivienne Mee

Journal of Digital Forensics, Security and Law

Researchers at Rits Information Security performed a study in how the Irish population disposes of their old computers. How would you dispose of your old computer, or how would the company you work for dispose of their old computers?

The majority of Irish homeowners, would bring their old computers to local civic amenity centres, give it away to a relative or sell it on to another party.

Some organisations would give their old equipment to a staff member, as a gift gesture, others may simply discard in the local civic amenity site.

What is wrong with the methods currently being …

Trends In Virtualized User Environments, Diane Barrett

Journal of Digital Forensics, Security and Law

Virtualized environments can make forensics investigation more difficult. Technological advances in virtualization tools essentially make removable media a PC that can be carried around in a pocket or around a neck. Running operating systems and applications this way leaves very little trace on the host system. This paper will explore all the newest methods for virtualized environments and the implications they have on the world of forensics. It will begin by describing and differentiating between software and hardware virtualization. It will then move on to explain the various methods used for server and desktop virtualization. Next, it will explain how …

The Research And Implementation Of Maintenance Excellence On Clean Utility Systems In The Pharmaceutical Indusry, Padraig Liggan

Dissertations

Maintenance Excellence is the implementation of best maintenance practices within industry; it is the balance of performance, risk, and cost to achieve an optimal solution. This thesis has been structured around the 5 main areas of maintenance excellence; it has documented all the important functions of the maintenance department that contributes towards maintenance excellence. Demonstrating maintenance excellence is a big achievement however demonstrating it on pharmaceutical clean utility systems with strict regulatory controls is a major challenge. Pharmaceutical production is one of the most heavily regulated industries. With such an emphasis on product quality in the pharmaceutical industry, and with …

Web-Scale Workflow: Integrating Distributed Services, M. Brian Blake, Michael N. Huhns

Faculty Publications

Modular applications, components, and services are all ways of describing the product of an organization's efforts to embody its capabilities in autonomous software modules. In fact, the integration of services using well-established workflow paradigms could amplify an organization's capabilities with the creation of a full-blown, inter-organizational system of systems. This is the essence of Web-scale workflows. Considering the recent popularity and acceptance of service-oriented technologies, the application of such distributed systems is only limited by imagination, but it's also important to understand existing research challenges and their implications to various Web-scale workflow domains.

Elimu 2.0: Investigating The Use Of Web 2.0 For Facilitating Collaboration In Higher Education., Bajuna R. Salehe

Dissertations

The latest web innovations and technologies which has made the Web into a ‘Platform’, are become increasingly applied in the higher education arena. Tools such as Google docs, Google groups, Wikis, Blogs, RSS and Podcasting are gradually becoming more popular within higher education in teaching and learning. Yet their huge potentials have not been fully explored. Collaboration and knowledge sharing are common terms in higher education, and in the corporate world of the today’s knowledge economy. However better infrastructure and facilities that enable these important issues are yet to be set and fully utilised in higher education. In the higher …

Knowledge Sharing: Using Searchable Email Databases, Frank Wedgeworth

Dissertations

In today’s knowledge driven economy, a company’s intellectual capital is increasingly becoming its most important asset. The knowledge of how to create value defines a company’s success. Through knowledge management the value of knowledge within a company can be increased. One way of increasing the value of knowledge is by making it more accessible. The accessibility of knowledge can be facilitated by integrating the search for knowledge into the user’s workflow. Another way to increase the value of knowledge is through the capture of undocumented, tacit knowledge and converting it into explicit, documented knowledge. Email has been identified as the …

A Knowledge Management Initiative In A Juvenile Detention School, Noel Sweeney

Dissertations

The preservation of knowledge has been a human endeavour since the dawn of time. Using whatever resources possible, humans have recorded knowledge for the purpose of bequeathing it to the next generations. With each technological advance, it would appear that the resources available for recording knowledge have improved. Not only this, but with each advance, the accessibility and availability to this knowledge has been enhanced; and in our present times, the impact of technology has made it easier than ever before. As with education, the consequence of making knowledge more available and accessible is the creation of more knowledgeable individuals …

Using Xml Topic Maps To Create A Knowledge Model Of Postgraduate Computer Science Degrees In Ireland For The Purpose Of Marketing Analysis, Catherine Mulwa

Dissertations

Marketing intelligence is a future-oriented activity that helps an organization cope in its market. It includes all ways an organization acquires and uses information. It is comprised of all kinds of information on the market and marketing research; the collection and analysis of internal data, competitive analysis; analysis and reverse engineering of competitor’s products; understanding how and where to add value for customers; and the process of synthesizing large amounts of informally gathered information about the industry and business environment. While marketing and marketing intelligence are widely used in business, they are less used in non-business organisations such as academic …

Investigation Of The Visual Aspects Of Business Intelligence, Niall Cunningham

Dissertations

As the need for Irish firms to move into knowledge economy increases knowledge management is being more important. Among its central aims is for knowledge creation and development to enhance knowledge and inspire innovations. One of the ways knowledge management achieves these aims is through the development of knowledge management tools for the firm. Among these tools is the option to use business intelligence to enhance knowledge in the firm by exposing hidden knowledge and building on it. In particular data mining has been highlighted as being effective within business intelligence and knowledge management in discovering hidden knowledge. This dissertation …

The Knowledge Side Of The Web, Max Kudrenko

Dissertations

The World Wide Web has become a household name long before its official sixteenth birthday last August (2007), not lastly because of its Knowledge potential encompassed in its vast Knowledge resources and its suitability for Knowledge activities. Out of the three main types of Web usage, which are Procedural, Leisure and Knowledge, this work will concentrate on the Knowledge one and try to analyse the rationale behind its growing popularity among both producers and consumers of Web content. The extensive Knowledge usage of the Web both demands and offers a specific type of Knowledge, Web Knowledge, which will be assessed …

Knowledge Swapshop: Implementing A Small But Scalable Knowledge Management Initiative In A Software Development Team., Glenn Higgins

Dissertations

Never before have so many organisation relied on their IT infrastructure for their survival and growth. In this environment the need for organisations to efficiently and cost effectively manage their computer systems is very clear. Knowledge management is increasingly being called upon to aid in the search for efficiency in the software development industry. This project proposes the introduction of a Knowledge management initiative in a small software development team. The initiative culminates in the introduction of an automated knowledge sharing system which is intended to facilitate easier collaboration among members of the team, while at the same capturing knowledge …

Data Recovery From Palmmsgv001, Satheesaan Pasupatheeswaran

Journal of Digital Forensics, Security and Law

Both SMS and MMS data analysis is an important factor in mobile forensic analysis. Author did not find any mobile forensic tool that is capable of extracting short messages (SMS) and multimedia messages (MMS) from Palm Treo 750. SMS file of Palm Treo 750 is called PalmMgeV001 and it is a proprietary file system. A research work done to find a method to recover SMS data from PalmMsgV001 file. This paper is going to describe the research work and its findings. This paper also discusses a methodology that will help recover SMS data from PalmMsgV001. The PalmMsgV001 file is analysed …

Extraction And Categorisation Of User Activity From Windows Restore Points, Damir Kahvedžić, Tahar Kechadi

Journal of Digital Forensics, Security and Law

The extraction of the user activity is one of the main goals in the analysis of digital evidence. In this paper we present a methodology for extracting this activity by comparing multiple Restore Points found in the Windows XP operating system. The registry copies represent a snapshot of the state of the system at a certain point in time. Differences between them can reveal user activity from one instant to another. The algorithms for comparing the hives and interpreting the results are of high complexity. We develop an approach that takes into account the nature of the investigation and the …

Steganography: Forensic, Security, And Legal Issues, Merrill Warkentin, Ernst Bekkering, Mark B. Schmidt

Journal of Digital Forensics, Security and Law

Steganography has long been regarded as a tool used for illicit and destructive purposes such as crime and warfare. Currently, digital tools are widely available to ordinary computer users also. Steganography software allows both illicit and legitimate users to hide messages so that they will not be detected in transit. This article provides a brief history of steganography, discusses the current status in the computer age, and relates this to forensic, security, and legal issues. The paper concludes with recommendations for digital forensics investigators, IT staff, individual users, and other stakeholders.

Using Agent Based Simulation And Game Theory Analysis To Study Information Sharing In Organizations – The Infoscape, Richard Donald Jolly, Wayne W. Wakeland

Complex Systems Faculty Publications and Presentations

Information sharing in organizations, especially the impact of sharing freely versus not sharing, was studied using game theory and agent based simulation. A game theoretic analysis was performed, and Netlogo simulations were carried out wherein some agents hoarded information while others shared information. As expected, sharing was found to greatly increase the overall amount of information within the organization. Unexpectedly, agents who share acquire more information than hoarders. This is due to the synergy that develops between groups of agents who are sharing with each other. The density of the agents is important-as the density increases, the probability increases that …

Emulsification And Dispersant Properties Of Sugar Ester Glycolipid In Water In Oil And Oil In Water Emulsion., Azrah Abdul Aziz

Student Works (2010-2019)

The influence of different dispersing agent on the rheological behaviors of paraffin oil-water emulsion with addition of TiO2 for uv-protect and moisturizing active ingredient was studied. While making creams with minimal structural defects and longer storage stability, it is important that preparation conditions be optimized. Settle volume properties, Zeta potential, effective diameter and settle volume of TiO2 suspension were studied in the presence of glycolipid (DDM and Carrageenan), nonionic (PEG 10,000 and Brij 35P) as well as anionic surfactants (sodium dodecyl sulfate, SDS). In the experiments, the higher concentration of dispersing agents shows higher settle volume percentage, higher zeta potential …

Photolithography Based Patterning Of Bacteriorhodopsin Films, Christopher M. Anton

Dissertations, Master's Theses and Master's Reports - Open

The patterning of photoactive purple membrane (PM) films onto electronic substrates to create a biologically based light detection device was investigated. This research is part of a larger collaborative effort to develop a miniaturized toxin detection platform. This platform will utilize PM films containing the photoactive protein bacteriorhodopsin to convert light energy to electrical energy.

Following an effort to pattern PM films using focused ion beam machining, the photolithography based bacteriorhodopsin patterning technique (PBBPT) was developed. This technique utilizes conventional photolithography techniques to pattern oriented PM films onto flat substrates. After the basic patterning process was developed, studies were conducted …

Bislug Flow In Circular And Noncircular Channels And The Role Of Interface Stretching On Energy Dissipation, Joseph E. Hernandez

Dissertations, Master's Theses and Master's Reports - Open

The area of microfluidics has increased in popularity with such fields as MEMS, microreactors, microscaleheat exchangers, etc. A comprehensive understanding of dissipation mechanisms for fluid flow in microchannels is required to accurately predict the behavior in these small systems. Tests were performed using a constant pressure potential created by two immiscible fluids juxtaposed in a microchannel. This study focused on the flow and dissipation mechanisms in round and square microchannels. There are four major dissipation mechanisms in slug flow; wall shear, dissipation at the contact line, menisci interaction and the stretching of the interface. A force balance between the internal …

Carbon Conversion During Bubbling Fluidized Bed Gasification Of Biomass, Kevin Timmer

Faculty Work Comprehensive List

Gasification is one means of transforming biomass so that it can be more easily utilized as a renewable source of thermal energy, transportation fuel, and chemicals. Under typical gasification conditions it is not uncommon that a portion of the carbon entering with the biomass leaves the reactor unconverted as char. Understanding and improving carbon conversion during biomass gasification in an atmospheric bubbling fluidized bed reactor is the focus of this study.

To better understand the intricacies of biomass gasification a carbon conversion analytic methodology was developed. The methodology is based on a mass balance of the fixed carbon entering and …

American Electric Power, Jun-Ki Choi, Bhavik R. Bakshi

Mechanical and Aerospace Engineering Faculty Publications

The Encyclopedia of Global Warming and Climate Change helps readers learn about the astonishingly intricate processes that make ours the only planet known to be habitable. These three volumes include more than 750 articles that explore major topics related to global warming and climate change—ranging geographically from the North Pole to the South Pole, and thematically from social effects to scientific causes.