Digital Commons Network^™

Assessment Of Groundwater Resources Using Remote Sensing And Gis, Muna Khalil Al Hammadi

Theses

Geographical Information Systems and Remote Sensing have witnessed an enormous interest in various applications related to geology, hydrology, hydrogeology, and water resources. The use of GIS and remote sensing has become a common practice worldwide. The UAE is no exception. The study of groundwater resources and its sustainability is of prime concern for authorities in the UAE. Although, groundwater may not be suitable, in most cases, for drinking and other potable purposes, it represents the main source for irrigation in the country. About 85% of the total water consumption in the UAE is groundwater.

This study is devoted to the …

Spectrally Stable Ink Variability In A Multi-Primary Printer, Edward Hattenberger

Theses

It was shown previously that a multi-ink printer can reproduce spectral reflectances within a specified tolerance range using many distinct ink combinations. An algorithm was developed to systematically analyze a printer to determine the amount of multi-ink variability throughout its spectral gamut. The advantage of this algorithm is that any spectral difference metric can be used as the objective function. Based on the results of the analysis for one spectral difference metric, six-dimensional density map displays were constructed to illustrate the amount of spectral redundancy throughout the ink space. One CMYKGO ink-jet printer was analyzed using spectral reflectance factor RMS …

Modulus, Sarah Kankiewicz-Arkins

Theses

None provided.

Effects Of Lining Cooling Tower Interior Walls On Controlling The Growth Of Legionella Pneumophila, Kamal Rafiq Saeed Jaroor

Theses

The presence of Legionella pneumophila in cooling tower waters is a serious health hazard. If the contaminated mist from the cooling tower is inhaled, Legionnaires' disease could be contracted. Of the 2.4 million cases of pneumonia that occur each year in the United States, an estimated 8,000 to 18,000 are actually cases of Legionnaires' disease. Several factors have been suggested in the literature that enhance the high bacterial count in cooling towers including: temperature, pH, water stagnation, and presence of algae and protozoa.

On few occasions, water samples from the cooling tower at Dubai Hospital tested positive for Legionella pneumophila …

Hydrogeological And Geophysical Studies On Ai Jaww Plain, Ai Ain Area, U.A.E., Hind Saif Ali Ai-Nuaimi

Theses

No abstract provided.

Paints And Their Environmental Impacts On Human Health In The U.A.E, Masara Y. Al-Ameri

Theses

This thesis records the findings of a research program related to "Paints and Their Environmental Impacts on Human Health in the U.A.E". The study recommends attempt to find out what paint types are of a less harmful influence on human health within different building types in United Arab Emirates due to environmental conditions.

According to Larry W. Canter (1997) "Environmental Impact Assessment" can be defined as "the systematic identification and evaluation of the potential impact (effects) of proposed projects, plans, programs, or legislative actions relative to the physical- chemical, biological, cultural, and socioeconomic components of the total environment. The primary …

The Effectiveness Of Sacp In Controlling Of Concrete Steel Reinforcement In Aggressive Environments, Hassan Ali Abubaker Al Jafri

Theses

The Arabian Gulf is considered to be one of the world's most aggressive environments for reinforced concrete. Traditional methods of corrosion protection may not be enough to provide the required level of corrosion control for the design life of concrete structures in such environments.

Cathodic protection has been found as a viable technique of inhibiting chloride induced corrosion of steel in concrete structures. As an alternative to impressed current cathodic protection ICCP a remarkable developments recently have been made in the application of sacrificial anode cathodic protection as a means of enhancing the performance of patch repair.

The main objective …

Treatment Of Industrial Wastewater From Food Processing Plant Under Climate Conditions, Saeed Mohamed Wali Abdulla Karmustaji

Theses

This research thesis will study the performance of wastewater treatment plant using a two-phase continuous flow anaerobic/aerobic treatment plant for the treatment of industrial wastewater from a confectionary factory in Dubai. The treatment design is based on anaerobic process under mesophilic conditions (31 +/- 2 °C) range where only the heat of the inlet and the natural climatic temperature are utilized to maintain the reactor operational. An aerobic activated sludge process to achieve the required legal standards follows the anaerobic treatment.

During the anaerobic process, biogas is generated and stored in a collection chamber and linked to an automated flared …

Assessment Of The Performance Of Shape Memory Alloys As Implant Devices, Noura Ali Al-Khalifi

Theses

Shape memory alloys are one class of the family of smart materials. They are considered as biomaterials, since they are well accepted by the human body. One special feature of shape memory alloys (SMA) is their ability to revert to their previous shape. This material is deformed at low temperature and when it is heated, it returns (remember) to its original form. Although, the implant binary NiTi SMA is particularly successful as a biomaterial, our NiTi SMA consist of more that 50% (55.7%) of nickel. The main purpose of this thesis was to evaluate the biological response of the shape …

Utilizing Of Elemental Sulfur From Oil And Gas Industry For Soil Treatment, Sultan Saif R. A. Alshamsi

Theses

The United Arab Emirates produces a large quantity of elemental sulfur from oil and gas industry. Elemental sulfur is widely used as soil treatment technique for reducing pH of alkaline soils than other techniques because it is cheaper and safer during treatment.

In this study, different designs mixes were prepared based on its content of sulfur and calcium carbonate. Different application rates of elemental sulfur (0, 1, 2, and 3%S) were added to soils having different amounts of calcium carbonates (i.e., 16.2, 21.2, 26.2, 36.2, 46.2, and 56.2% for basic mix design, and mix designs types I, II, III, IV, …

Treatment Of Petroleum Refinery Wastewater Effluent Using Coupled Carbon Sorption And Biodegradation, Fatin Ali Sadiq Sawalha

Theses

There has been increased interest in the development of technologies for the effective removal of priority pollutants from petroleum refineries and thereby protect the quality of receiving water. In this study, the removal of phenol and naphthalene from aqueous solutions using different bacterial strains, granular activated carbon and biological activated carbon as a combination of the two systems were investigated. Laboratory-scale experiments for the adsorption, biodegradation and biosorption of the two chemicals were conducted in batch reactors at 25°C and shaking at 120 rpm. Pure bacterial cultures of phenol-utilizing bacteria and naphthalene-utilizing bacteria were isolated from local enriched soil and …

Optimal Sizing Of Activated Sludge Domestic Wastewater Treatment Processes Considering Uncertainties, Abdulhameed A. Arwani

Theses

A mathematical framework is developed for use in the optimal sizing of a wastewater treatment system comprises an activated sludge system preceded by a primary clarifier. Mathematical models predicting the performance of various unit processes are used to construct the system model. ASM3, used in the developed framework, is among the most recent and comprehensive models that closely describe the biological reactions taking place in the activated sludge system. Cost information functions including capital and operational costs of different system units are also modeled. An optimization problem is formulated with the objective to produce optimal sizes of different units with …

The Old Pond, Takeshi Takamoto

Theses

None provided.

Rethinking Philosophy:A Proposed Model Aimed At Improving The Philosophy Of Education Within Hospitality Management In Ireland, Colin O'Connor

Theses

This study explores the philosophy of higher education within hospitality management education in Ireland. The central aim of this study is to develop a model to assist educators examine and improve their philosophy of hospitality education. The study reveals the positive contribution that the philosophy of education can make to educators of hospitality management and the hospitality industry. The purpose and role

of educational philosophy is both a fundamental and valid concept for those involved in

higher education and hospitality management education. The study reviews current literature in the tield of educational philosophy and

hospitality management education. An in·depth qualitative …

Steady-State And Transient Analysis Of Electro-Thermal Microactuators Using Finite Element Methods, Amarendra Atre

Theses

Recent techniques in radar and communication systems favor the development of phased arrays. The major problems to such systems are size and cost due to the large number of individual transmit/receive modules required. Photonic systems implemented in MEMS technology have reduced bulk optical systems to microscale proportions. This reduction in scale is particularly important to phased arrays since it allows flexibility in deployment. This thesis aims to understand the steady state and transient characteristics of an electrically heated, thermally driven, surface micromachined MEMS polysilicon beam flexure actuator to be employed for the rotation of an r-f phase shifter utilized in …

The Pigeon And The Mouse, Elsi Caldeira Mendes

Theses

Thesis describes the creation of a 3D-computer animated film based on a Venezuelan folk tale.

Experimental Study Of Ignition Of Mechanical Alloy And Pure Metal Powders, Ruslan Mudryy

Theses

Mechanical alloys of Al Mg, AI Zr, Al Ti, Al Li, Al C, Al Mg H, B Mg, B Al, and B Ti were produced and tested for possible applications as high energy density additives to fuels, propellants, explosives, and incendiaries. These new materials are metastable, supersaturated, nanocrystalline solid solutions that include a base metal as a solvent and another component (metal or gas, e.g. hydrogen) as a solute. Phase changes occurring in such materials during ignition and combustion are expected to significantly affect both ignition and bum rates. This experimental program focused on the characterization of ignition kinetics of …

Soft Fault Detection Using Mibs In Computer Networks, Sachin Arora

Theses

To improve network reliability and management in today's high-speed communication system, a statistical anomaly network intrusion detection system (NIDS) has been investigated, for network soft faults using the Management Information Base (Mm) traffic parameters provided by Simple Network Management Protocol (SNMP), for both wired and wireless networks. The work done would be a contribution to a system to be designed MIB Anomaly Intrusion Detection, a hierarchical multi-tier and multiobservation-window Anomaly Intrusion Detection system. The data was derived from many experiments that had been carried out in the test bed that monitored 27 MIB traffic parameters simultaneously, focusing on the soft …

The Consolidation Analysis Of A Clay Layer In The City Of Belem Do Para, Brazil, John Bezerra Jr.

Theses

In this study, an analysis was done on a particular clay layer found in the city of Belem do Para, Brazil. Various soil tests were conducted including a consolidation analysis. Data were gathered and analyzed in order to obtain a better understanding of how the soil responds under certain loading conditions. There have been no previous studies done on this material and so when it has been encountered in the field geotechnical engineers provide the safest, but not necessarily best design method possible. In the case of large buildings, piles are driven past this material to competent sand. There have …

Improving The Process Of Laser Retinal Eye Surgery Using Electro Static Micro Mirrors, Narashiman Chakravarthy

Theses

This thesis describes an improved system for laser eye surgery. The system incorporates hardware based image matching and MEMS micromirrors for feedback control of laser positioning on the eye. Many benefits are described in this thesis, such as nulling out eye movement, tracking laser firing history, enabling precise control of laser firing locations and preventing firing accidents. The aim of this work is to frame this improved laser surgery concept and prove the principle of various components of the system. A featured accomplishment is the modeling and simulation of a prototype microcontroller using VHDL that may be incorporated as part …

Modification Of Biodegradable Polyesters With Inorganic Fillers, Georgia Chouzouri

Theses

In attempts to address the growing need of materials with controlled degradation characteristics and good mechanical properties for tissue engineering applications, composites based on biodegradable polymers and a potentially bioactive novel inorganic synthetic filler were produced and characterized. Composites were produced by solution mixing of a commercial polylactic acid, as well as a biodegradable thermoplastic polyester based on butylene adipate/succinate, with synthetic magnesium/aluminum carbonate minerals, known as hydrotalcites. Two types of hydrotalcites, at 30 wto/o filler level, were used: surface coated and uncoated. Composites were also melt-mixed in a twin-screw extruder for comparison.

Differential Scanning Calorimetry (DSC), Thermogravimetric Analysis (TGA), …

Labview-Controlled Stimulus Presentation On A Monitor For Smooth Pursuit Eye Movement Experiments, Florence Bautista Chua

Theses

Smooth pursuit is an example of how movements in the visual world guide involuntary oculomotor movements. A current system to study eye movements uses an oscilloscope screen. A computer screen offers many advantages: a greater visual field, the use of shapes, 32 bits of colors, and increased timing accuracy. To control stimulus display on a computer monitor, instrumentation was developed in LabVIEW. Initial studies supported a draw/redraw to erase method for stimulus presentation. An experiment compared the computer monitor to the oscilloscope. Indeed, the monitor display was an improvement over the oscilloscope for vision research.

Hop-Limited Routing For Multihop Cellular Networks, Cem Dincer

Theses

In recent years, conventional cellular systems have experienced evolution in fields of data oriented services. During this period, the requirement for high data-rate stimulated new research proposals, which resulted in a new architecture: Multihop Cellular Networks (MCN), where multihop structure enables mobile stations to forward packets from other mobile stations to the base station on the uplink, and in turn, forward packets to other mobile stations from the base station on the downlink. In this thesis, a new routing algorithm is introduced for MCNs in order to limit the number of hops between the base station and the mobile stations …

Data Recording And Analysis Of American Sign Language, Robert Michael Demarco

Theses

American Sign Language (ASL) is a form of communication that is used by the Deaf. It consists of hand shapes and gestures to express words and phrases. Translators on the market today consist of interpreting a simple form of ASL known as finger spelling. In order to develop a more effective translator, instrumentation was developed utilizing a Flock of Birds and Cyberglove system to record in hand shapes and movements in a LabVIEW environment. Experimentation done included reading in data and subjectively analyzing the data recorded for accuracy. Initial results have show that the instrumentation worked and data was recorded …

Characterization And Mapping Of Crystal Defects In Silicon Carbide, Ejiro Emorhokpor

Theses

Silicon carbide (SiC) is a semiconductor with attractive properties, such as a wide bandgap (3. 26 eV), high dielectric strength, and high thermal conductivity that make it suitable for high power, highspeed electronic devices. A major roadblock to its wider application is the presence of defects, particularly micropipes and dislocations, in SiC wafers produced today and decreasing density of these defects is the most important challenge of the industry. The goal of this thesis was to design, build and test a system for detection and analysis of the defects in SiC wafers. The system is based on the reflection optical …

The Illusion Of Science : Images Of Science On Stage, Preethi Ganapathy

Theses

Science has long been regarded as a process of thinking, of pursuing the truth. This quest traditionally has been reserved for an elite group of thinkers, since at least the time of Aristotle, who was considered as the undisputed authority on philosophical truth, including that which we call science. The Scientific Revolution challenged Aristotle's authority and paved the way for the new method of evaluating scientific truths developed by Bacon, Descartes, and Galileo. Science became, over time, a process of inquiry open to all social and economic classes and accessible to all. In the twentieth century, the role of science …

Role Of Catalyst And Substrate In Synthesis Of Single Wall Carbon Nanotubes, Amit Goyal

Theses

The synthesis of single wall carbon nanotubes (SWNTs) by the catalyticdisproportionation of carbon monoxide (CO) (i.e., Boudouard reaction) at I atm pressureand 700-800 C, has been systematically investigated in order to determine whether theprocess can be used for the large scale production. SWNT diameter distribution andmorphology were studied by Raman scattering, and scanning and transmission electronmicroscopy, respectively. X-ray diffraction was used to determine levels of the remnantcatalyst and support. Synthesis experiments were conducted using a three-stage processwith hydrogen to reduce the catalyst-precursor and argon to cool the system. Two typesof catalyst/support synthesis were studied: (1) Combustion synthesis to form catalyst …

Fpga Implementation Of A Cholesky Algorithm For A Shared-Memory Multiprocessor Architecture, Satchidanand G. Haridas

Theses

Solving a system of linear equations is a key problem in the field of engineering and science. Matrix factorization is a key component of many methods used to solve such equations. However, the factorization process is very time consuming, so these problems have traditionally been targeted for parallel machines rather than sequential ones. Nevertheless, commercially available supercomputers are expensive and only large institutions have the resources to purchase them or use them. Hence, efforts are on to develop more affordable alternatives. This thesis presents one such approach.

The work presented here is an implementation of a parallel version of the …

Wickedness In High Places : A Rhetorical Analysis Of The Film Hitler's Children, Alicia Pearlette James

Theses

The premise of this investigation is that propaganda works best when presented through a fictional work rather than through factual documents. The fact/fiction combination of the non-fiction book, Education for Death: The Making of the Nazi (1941) and the fictional feature-length film, Hitler's Children (1943) is used to illustrate how film propagandists use camera angles, lighting, music, dialogue, narration, storyline, footage from other films, and cinematic conventions to dramatize and emphasize several scenes from the book. Attention is also paid to scenes in the film that dramatize government war aims, as supplied by the Bureau of Motion Pictures of the …

Chat And Instant Messaging : The Risks Of Secondary Orality, Gregory P. Kohn

Theses

The synchronous nature of chat and instant messaging (IM) make them unique among computer-enabled communications technologies in that their real-time exchange of data allows for rich media experiences, even though users can only use text symbols to trade messages. Chat and IM are also important in that they enable secondary orality, or the merger of the most beneficial aspects of orally-based cultures with the well-documented benefits of print and text. Where print in the modem day has fostered contemplative behavior and inward thought among human beings, chat and IM breathe vitality into print and, in a sense, allow print to …