Digital Commons Network^™

Utilization Of Functionally Graded Materials In Femoral Prosthesis / Azim Ataollahi Oshkour, Oshkour Azim Ataollahi

Student Works (2010-2019)

Total hip replacement is a highly effective surgical operation that relieves pain and restores the function of a degenerated hip joint. However, with the increasing incidence of total hip replacements, particularly among young patients, and femoral prosthesis implantation, implant designs should consider long-term survival and better performance. Minimizing the mismatch between the prosthesis and bone stiffness to reduce stress shielding and retain interface stresses within acceptable levels, can increase the longevity of total hip replacement and enhance the performance of the prosthesis. A prosthesis with adjustable stiffness may enable prosthetists to match the prosthesis and bone stiffness. Functionally graded materials …

Energy, Heat Transfer And Economic Analysis Of Flat-Plate Solar Collector Utilizing Sio2 Nanofluid / Mohd Faizal Fauzan, Fauzan Mohd Faizal

Student Works (2010-2019)

Solar thermal energy can be a good replacement for fossil fuel because it is clean and sustainable. However, the current solar technology is still not efficient and expensive. The effective way to increase the efficiency of solar collector is to use nanofluid. This study is carried out to analyze the impact on thermal performance, heat transfer and economic of a flat-plate solar collector when SiO2 nanofluid utilized as working fluid. The analysis is based on different volume flow rates and varying nanoparticles volume fractions. From the numerical study, it can be revealed that CuO have the highest thermal efficiency enhancement …

Electrodeposition And Characterization Of Sn-Bi Lead-Free Soldier Alloys / Goh Yingxin, Ying Xin Goh

Student Works (2010-2019)

Tin-bismuth eutectic alloy (Sn-58 wt.% Bi) is emerging as a potential lead-free solder alternative. The low melting temperature (138oC) of this alloy makes it a suitable candidate for higher level interconnections and for soldering heat sensitive components. Demands for high density interconnections led to the development of electroplating technique in soldering. In this work, a methane sulfonic acid (MSA) based plating bath is developed for the electrodeposition of Sn-Bi solder alloys. Composition control of the alloy is hampered by the large potential gap between the two elements. Electrolyte additives were incorporated to assist the simultaneous deposition of Sn and Bi. …

Dengue Rapid Diagnostic Via Surface Plasmon Resonance Biosensor / Peyman Jahanshahi, Jahanshahi Peyman

Student Works (2010-2019)

The aim of this thesis is to introduce an optical technique which can be utilized in detection of dengue virus rapidly. This technique involves the application of analytical and numerical electromagnetic simulations led by physical insight and theoretical knowledge. As a part of this study, the most common permittivity function models are compared and the best model is identified for the proposed biosensor structure. The best model (Brendel-Bormann) is found to have an accuracy of ~94.4% with respect to experimental data. On the other hand, Finite Element Method (FEM) is found to be a valuable tool in the numerical solutions …

Power Management System For Smart Microgrid Considering Meteorological And Load Demand Data / Sam Koohikamali, Koohikamali Sam

Student Works (2010-2019)

Integration of utility scaled solar electricity generator into power networks can negatively affect the performance of next generation smart grid. Rapidly changing output power of this kind is unpredictable and thus one solution is to mitigate it by short-term to mid-term electrical storage systems like battery. For this purpose, the battery storage system should be dispatched properly by a power management system (PMS) and hence the main objective of this work is to propose a PMS for smart microgrid (MG) applications. Microgrid refers to a cluster of generation, load, and energy storage units which can operate in grid-connected and/or in …

Development Of Thulium-Doped And Co-Doped Fiber Lasers For 1.9 Micron Region Operation / Norazlina Saidin, Saidin Norazlina

Student Works (2010-2019)

1.9 μm fiber lasers offer numerous applications in the area of spectroscopy, military and medical field. Thulium doped fiber has been used in order to realize laser applications in this region. Various methods have been implemented to achieve high output power as well as low threshold pump power for the laser’s applications. Other than being used for continuous wave operation, pulse lasers are also important in various fields of applications including high-precision material processing, biomedicine and ranging. This thesis thoroughly describes the development of 1.9 μm fiber lasers based on thulium doped and co-doped fibers as the gain medium. Two …

An Integrated Approach For Techno-Economic And Environmental Analysis Of Power Generation From Paddy Residue In Malaysia / Shafini Mohd Shafie, Mohd Shafie Shafini

Student Works (2010-2019)

Malaysia is blessed with abundant biomass residue that can potentially be used as a source of electricity generation. One of them is paddy residues. Annually about 3.66 million tonne of paddy residue is left in the fields. Towards year 2020 this value is forecasted to increase to 7 million tonne per year due to emerging technology development in agriculture industries. Paddy residue can potentially be used as feedstock fuel for electricity generation in Malaysia. However, the techno-economic study on paddy residue based power generation for Malaysia condition is still limited. Therefore, this thesis explores the non-technical aspect regarding the potential …

Development And Application Of Technical And Economic Strategies In Upgrading Heavy Oil: The Case Of Iran / Nooshin Jabbari, Jabbari Nooshin

Student Works (2010-2019)

Nowadays, due to the increasing demand for energy at an alarming rate, the alternative resources of energy are being explored to compensate the depleting conventional energy resources. One such alternative, if the upgrading processes are effectively managed, could be heavy crude oil. Iran is endowed with large resources of both conventional and unconventional Oil. However Due to the decrease in the conventional resources in Iran, the National Iranian Oil Company (NIOC) has been compelled to resort to the unconventional oil resources. However, the transition to heavier and sourer oil resources results in some technical, economic and environmental challenges for the …

Effect Of Ultrasonication On Colloidal Thermophysical And Rheological Properties Of Alumina-Water Nanofluid / Mohammed Mahbubul Islam, Mahbubul Islam Mohammed

Student Works (2010-2019)

Nanofluids are promising fluids for heat transfer applications. Low stability and high viscosity are two important drawbacks for practical applications of nanofluids. The aggregation and sedimentation of nanoparticles are related to the colloidal dispersion characteristics, which directly affect the stability and thermophysical properties. An ultrasonic homogenizer can break the aggregation of particles and disperse them into a fluid to improve the stability of the suspension. Therefore, sound energy is needed to improve thermal energy. However, the research question is whether the improvement achieved in thermal application is feasible for the amount of used ultrasound energy. The aim of this research …

Development And Validation Of The Technology Adoption And Gratification (Tag) Model In Assessing Lecturers’ Ict Use / A.Y.M. Atiquil Islam, Atiquil Islam A.Y.M.

Student Works (2010-2019)

In this age of exponential knowledge growth, where Information and Communication Technology (ICT) has been playing a dominant role, the authorities of Higher Education concerned have to ensure that the ICT facilities remain within the reach of the lecturers for their teaching and research purposes. However, despite a decade of existence, the ICT facilities were found to be underutilized by lecturers. Constructs such as computer self-efficacy, perceived ease of use, perceived usefulness, use and gratification were hypothesized to be major barriers. In doing so, the prime objective of this study was to develop and validate the Technology Adoption and Gratification …

Synthesis And Characterization Of Polyaniline For Hydrazine Detection / Kavirajaa Pandian Sambasevam, Sambasevam Kavirajaa Pandian

Student Works (2010-2019)

Among the conducting polymers, polyaniline (PAni) is studied most extensively due to the ease of synthesis, high conductivity and low production cost. Hydrazine from fuels, pesticide and corrosion inhibitor industries are a toxic compound which can cause neurotoxicity and carcinogenicity. In this study, a series of PAni were synthesized and applied as a chemical sensor for hydrazine detection. The sensor responses of PAni were monitored by ultraviolet-visible (UV-Vis) analysis in hydrazine detection. Besides, the sensor response was supported by conductivity study and Fourier transform infrared (FTIR) analysis to identify the chemical interaction between the PAni and the hydrazine. Doped-PAni were …

Chemical Constituents From The Rhizomes Of Curcuma Zedoaria And Curcuma Purpurascens And Assessment Of Their Biological Activities / Omer Abdalla Ahmed Hamdi, Ahmed Hamdi Omer Abdalla

Student Works (2010-2019)

Curcuma zedoaria (Christm.) Rosc. (local name: Temu putih) and Curcuma purpurascens are two medicinally important plants of the genus Curucma and grow abundantly in Asian countries including Malaysia and Indonesia. These two plants are extensively used in the traditional medicinal practice of Malaysia and many other countries of the world for the treatment of various ailments. Phytochemical investigation of the rhizomes of C. zedoaria and C. purpurascens resulted in the isolation of 27 compounds. C. zedoaria afforded eighteen sesquiterpenes, including eight germacrane type (dehydrocurdione 19, curdione 20, furanodiene 21, furanodienone 22, germacrone 23, germacrone 4,5-epoxide 24, germacrone 1,10-epoxide 25, and …

Management Of Children Who Come Into Conflict With The Law During Pre-Trial Stage In Malaysia. Do The Current Practice And Procedures Accord To International Standards? / Fon Thiam Seong, Thiam Seong Fon

Student Works (2010-2019)

Malaysia as a State Party to the Convention on the Rights of the Child and other international instruments are bound by the provisions enshrined in those treaties. Despite all this commitments and obligations, children still experience arbitrary arrest, torture and illtreatment while undergoing police investigation. Still too often, they are deprived of proper treatment that should have been given to them under those treaties. Past literature would show that the rights afforded to children in conflict of the law especially during the pre-trial stage are reduced significantly or in other words not given proper consideration by the enforcement authorities in …

Study Of The Effects Of Neutral Gas Heating In A Radio Frequency Inductively Coupled Plasma / Kanesh Kumar Jayapalan, Jayapalan Kanesh Kumar

Student Works (2010-2019)

A 13.56 MHz, planar coil, inductively coupled plasma reactor was experimentally and theoretically characterized; with emphasis on the effects of neutral gas heating on the distribution of the H mode magnetic fields of the source coil and the E-H mode transition characteristics of the discharge. The radially resolved electron density, ne, electron temperature, Te and electron energy distribution function (EEDF) were measured using a Langmuir probe at different axial distances above the dielectric plate for 0.03, 0.07 and 0.2 mbar argon pressures. The range of ne and Te obtained were (0.065 ± 0.004)-(4.0 ± 0.6) × 1017 m-3 and (1.38 …

Feasibility Study Of Ground Palm Oil Fuel Ash As Partial Cement Replacement Material In Oil Palm Shell Lightweight Concrete / Mohammad Momeen Ul Islam, Ul Islam Mohammad Momeen

Student Works (2010-2019)

The fresh concrete properties and mechanical properties of oil palm shell concrete (OPSC) containing palm oil fuel ash (POFA) as partial cement replacement have been evaluated. The effects of POFA replacement levels of 0%, 5%, 10%, 15%, 20% & 25% under different curing regimes, namely air curing, full water curing and initial water curing were investigated. For the evaluation of fresh concrete properties various test like slump, vebe second, compaction factor and wet density test were performed. The highest 28-day compressive strength of 42 MPa was obtained for the OPSC containing 10% of POFA under continuous water curing condition. The …

Cfd Study Of Formation And Rise Characteristics Of A Single Bubble In Bubble Column / Md.Tariqul Islam, Islam Md. Tariqul

Student Works (2010-2019)

The volume of fluid with the continuum surface force (VOF-CSF) method has been used in the current numerical work to investigate the bubble formation and the bubble shape in a bubble column. The shape of the bubble has been tracked by using the piecewise linear interface calculation (PLIC). The effect of orifice sizes ranging from 0.5 mm to 1.5 mm on the bubble formation stages (i.e., expansion, elongation and pinch off), bubble contact angle, departure diameter, time and shape of bubble was investigated under a constant inlet velocity (0.2 m/s) boundary condition. It was found that a leading bubble required …

Feasibility Study On Implementation Of Marine Renewable Energy In Malaysia By Considering The Project Costs And Urban Public Acceptance / Lim Xin Le, Xin Le Lim

Student Works (2010-2019)

Energy demand due to increasing global population and the need for low carbon energy have led to the rising importance of renewable energy. Apart from the three most used renewable energy sources in Malaysia – solar energy, hydroelectric and biomass –marine renewable energy may be another potential player in the renewable energy market. Marine renewable energy, which comprises of tidal energy, wave energy, ocean thermal energy conversion (OTEC) and salinity gradient, can be harnessed in Malaysia as the country is surrounded by abundant water resources. The development of marine renewable energy, however, is currently still in its infancy and may …

Corrosion Of Carbon Steel In Different Biodiesel Blends / Mohd Adam Mohd Noor, Mohd Noor Mohd Adam

Student Works (2010-2019)

Biodiesel is currently in regular use as an alternative fuel over conventional petroleum diesel. However, corrosion of automotive materials is one of the concerns related to biodiesel compatibility issues. The present study aims to investigate the effects of Tertbutylamine and Benzotriazole additive addition on the corrosion behavior of low carbon steel S45C material in different biodiesel blends. Static immersion tests in biodiesel conducted for 1440 hours on solution B0, B20, B50 and B100 without the presence of corrosion inhibitors. Similar testing was carried out with the addition of additive Tertbutylamine and Benzotriazole on solution B20 and B100. At the end …

Experimental Study Of Engine Performance And Emission Of Palm, Mustard And Calophyllum Biodiesel Blends In A Diesel Engine / Sanjid Ahmed Patwary, Patwary Sanjid Ahmed

Student Works (2010-2019)

Present energy situation of the world is unsustainable due to unequal geographical distribution of natural wealth as well as environmental, geopolitical and economical concerns. Ever increasing drift of energy consumption due to growth of population, transportation and luxurious lifestyle has motivated researchers to carry out research on biofuels as a sustainable alternative fuel for diesel engine. Biodiesel seems as one of the best choices among other alternative fuel sources due to its renewability, cost effectiveness and reduction of pollutants in exhaust gas emission which are promoting biofuels as a suitable substitute of diesel fuel in near future. This research endeavor …

A Hybrid Multi-Criteria Analysis Of Energy Efficient Co2 Iron Making Technologies With Carbon Capture And Storage / Md Abdul Quader, Quader Md Abdul

Student Works (2010-2019)

An increase in CO2 emissions to the atmosphere from the fossil fuel based industries has contributed serious global warming problems. Among several greenhouse gases (GHGs), CO2 is the prime contributor and accounts for approximately 60% of the greenhouse effect due to its immense amount of discharges. The iron and steel industry is known as the largest energy consuming manufacturing sector, contributing 5% of the world’s total energy consumption. Also, this industry is emitting about 6% of the total world anthropogenic CO2. Therefore, investigation, development and deployment of alternative energy-efficient iron-making breakthrough technologies along with CO2 capture technologies are receiving high …

Analysis Of Plant Analytes Using Capillary Electrophoresis And High Performance Liquid Chromatography, Umme Kalsoom

Theses: Doctorates and Masters

Plants contain an enormous array of organic and inorganic components, the analysis for which may involve a wide range of methods. The focus of this study was to develop high performance liquid chromatography and capillary electrophoresis methods for the analysis of three classes of analytes: osmoregulants, minerals and amino acids.

Firstly, this study explored the potential of capillary electrophoresis for the analysis of three very common osmoregulants (proline, glycine betaine and mannitol). A diverse array of methods has been reported for determining each of these analytes, however, the literature on osmoregulants and their analysis is quite disjointed and traverses both …

The Form And Use Of Social Capital Among Foreign Direct Investors In Their Interactions With Locals In Northern Laos, Bjarne Sorensen

Theses: Doctorates and Masters

The research conducted for this thesis is in the area of international business; it has focused on the emerging market of Laos – and it has in particular sought to identify the form and use of social capital in the northern part of the country. This thesis will present the rationale behind the research, the planning that took place before the fieldwork commenced, and most importantly the findings of the study.

Social capital is a sociological concept that since the early 1990s has gained significant recognition in the literature. While the benefits to holders of economic capital is commonly recognised …

Reforming Law Schools: A Manifesto, Frank H. Wu

Faculty Scholarship

No abstract provided.

The Morality Of Law Practice, Geoffrey C. Hazard Jr.

Faculty Scholarship

No abstract provided.

Disruptive Pedagogy: Incorporating Critical Theory In Business Law Clinics, Alina S. Ball

Faculty Scholarship

No abstract provided.

Pleading And The Litigation Marketplace, Scott Dodson

Faculty Scholarship

No abstract provided.

Horizontal Enforcement And The Ilc’S Proposed Draft Articles On The Immunity Of State Officials From Foreign Criminal Jurisdiction, Chimène Keitner

Faculty Scholarship

No abstract provided.

Vaccines, Measles And Rights, Dorit Rubenstein Reiss

Faculty Scholarship

No abstract provided.

Support After Brain Tumor Means Different Things: Family Caregivers' Experiences Of Support And Relationship Changes, T. Ownsworth, E. Goadby, Suzanne K. Chambers

Research outputs 2014 to 2021

Shorter hospital stays and greater emphasis on outpatient care means that family members have the primary responsibility for supporting a person with brain tumor to manage the physical, cognitive, behavioral, and emotional effects of the illness and its treatment. Given the integral role of family caregivers, it is essential to understand their experience of the impact of brain tumor and their own support needs. Accordingly, this qualitative study aimed to investigate family caregivers' experiences of support and relationship changes in the context of brain tumor. In-depth interviews were conducted with 11 family caregivers (8 spouse/partner, 3 parents) of people with …

A Preliminary Investigation Into The Relationship Between Functional Movement Screen Scores And Athletic Physical Performance In Female Team Sport Athletes, R.G. Lockie, A.B. Schultz, Samuel J. Callaghan, C.A. Jordan, T.M. Luczo, M.D. Jeffriess

Research outputs 2014 to 2021

There is little research investigating relationships between the Functional Movement Screen (FMS) and athletic performance in female athletes. This study analyzed the relationships between FMS (deep squat; hurdle step [HS]; in-line lunge [ILL]; shoulder mobility; active straight-leg raise [ASLR]; trunk stability push-up; rotary stability) scores, and performance tests (bilateral and unilateral sit-and-reach [flexibility]; 20-m sprint [linear speed]; 505 with turns from each leg; modified T-test with movement to left and right [change-of-direction speed]; bilateral and unilateral vertical and standing broad jumps; lateral jumps [leg power]). Nine healthy female recreational team sport athletes (age = 22.67 ± 5.12 years; height = …