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Preparation Of Silica Gel From Rice Husk Ash Using Microwave Heating, S Rungrodnimitchai, W Phokhanusai, N Sungkhaho

Journal of Metals, Materials and Minerals

The purpose of this research is to separate silica gel from rice husk ash by microwave heating. The experiments were performed by heating rice husk ash in sodium hydroxide solution with various concentrations in microwave oven for 5 or 10 minutes. The obtained sodium silicate was neutralized to give silica gel. The best condition for silica gel production was the reaction with 2.0 M sodium hydroxide at microwave power of 800 W for 10 minutes. The ability of silica gel as desiccant was investigated by adsorption test. The results showed that silica gel prepared by low concentration of sodium hydroxide …

Selected Barriers And Incentives For Participation In A University Wellness Program, Trever J. Ball

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Evidence supporting the benefits of worksite health promotion (WHP) programs is extensive. Research shows these programs can improve the health of participants, lower health care costs, and improve the bottom line of employers. Although the evidence of these benefits is vast, reported participation in WHP is not optimal. Little published data exists on employees' perceived incentives and barriers for participation in WHP.

The purpose of this study was to determine perceived barriers and incentives for participation in an existing WHP program at a large land-grant university. Opinions of eligible WHP participants were collected using a web-based questionnaire (n = …

Designing An Instrument Based On Native Fluorescence To Determine Soil Microbial Content At A Mars Analog Site, Heather D. Smith

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

For this research project we designed an instrument to detect bacteria via biomolecular fluorescence. We introduce the current understanding of astrobiology, our knowledge of life beyond Earth, and the commonality of Earth life as it pertains to the search for life on Mars. We proposed a novel technique for searching for direct evidence of life on the surface of Mars using fluorescence. We use the arid region of the Mojave Desert as an analog of Mars. Results indicate the fluorescence of the biotic component of desert soils is approximately as strong as the fluorescence of the mineral component. Fluorescence laboratory …

El Concepto De Audiencia Y La Colaboración Entre Iguales En La Revisión De Textos Escritos, David Sánchez-Jiménez

Publications and Research

No abstract provided.

Two-Phase Boost Converter, Tadeus Gunawan

Master's Theses

A boost converter is one of the most efficient techniques to step up DC input voltage to a higher needed DC output voltage. The boost converter has many possible applications, such as in a photovoltaic system, hybrid car and battery charger. The proposed prototype in this report is a proof of concept that a Two-Phase Boost Converter is a possible improvement topology to offer higher efficiency without compromising any advantages readily offered by a basic boost. The prototype is designed to be able to handle up to 200 watts of output power with an input of 36 volts and an …

Extraction And Characterization Of Lipids From Microalgae Grown On Municipal Wastewater, Matthew W. Hutton

Master's Theses

Based on results of its Aquatic Species Program (1978-1996), which sought to develop algae-to-liquid fuel technology, the U.S. Department of Energy has suggested that algal wastewater treatment may be incorporated into biodiesel production schemes to reduce the operating costs of both processes. the purpose of the current research was to evaluate the triglycerides produced by wastewater-grown algae for their suitability as a fuel feedstock and to investigate the effectiveness of several solvent mixtures and extraction procedures at recovering lipids from fresh algae. The research involved two separate experiments. The first determined the quantity and quality of lipids produced over the …

Techniques For Triggering Germination Of Adenostoma Fasciculatum In Revegetation Projects At Rocky Canyon Quarry, Stephanie B. Scolari

Master's Theses

Rocky Canyon Quarry is a granite mine located in the Santa Lucia Mountains about 5 miles southeast of the city of Atascadero. The Surface Mining and Reclamation Act (SMARA), which passed in 1975, dictates that California mines must rehabilitate lands disturbed by mining operations. Dr. V. L. Holland and his students in the Biological Sciences Department at California Polytechnic State University, San Luis Obispo (Cal Poly) have been working on restoration and revegetation of the Rocky Canyon Quarry since the early 1990’s.

Adenostoma fasciculatum (chamise) dominates the chaparral communities (chamisal chaparral) found in Rocky Canyon. Chamise is the most common …

Point-Of-Use Water Treatment Device For Disaster Relief, Patricia Marie Compas

Master's Theses

A point-of-use water treatment device and an optimal method for its use were developed. The specially-designed vessel is to be used with flocculation and disinfection agents, while also providing for clean water storage. Possible applications would be disaster relief, emergency preparedness, and outdoor recreation.

Analysis Of A Pinus Radiata Seed Stock Field In The Native Año Nuevo Stand In California, Christina Brassey

Master's Theses

This study was a part of the international collaborative IMPACT project, which aims to address the potential threat that the pitch canker disease poses to the use of Pinus radiata D. Don in plantations in New Zealand, Australia, and Chile. A field trial of 264 seedstocks was planted adjacent to a native stand of pitch canker infected P. radiata on the central coast of California, and disease symptom development was recorded over a period of 3 years. The results did not correlate with a greenhouse study of the same seedstocks inoculated with Fusarium circinatum Nirenberg & O'Donnell, the causal agent …

Detection And Tracking Of Stealthy Targets Using Particle Filters, Philip M. Losie

Master's Theses

In recent years, the particle filter has gained prominence in the area of target tracking because it is robust to non-linear target motion and non-Gaussian additive noise. Traditional track filters, such as the Kalman filter, have been well studied for linear tracking applications, but perform poorly for non-linear applications. The particle filter has been shown to perform well in non-linear applications. The particle filter method is computationally intensive and advances in processor speed and computational power have allowed this method to be implemented in real-time tracking applications. This thesis explores the use of particle filters to detect and track stealthy …

Single Cell Impedance Measurements Using Microfabricated Electrodes And Labview Graphical Programming, Stephanie Sophia Hernandez

Master's Theses

This Master’s Thesis project consists of the research, design, and fabrication of a system that could perform broadband impedance measurements (1kHz-20Mhz) of single cells using National Instruments Labview data acquisition and programming in coordination with a single cell capture device. Presented first is the background information on cells and their electrical properties, along with background in micro-total-analysis systems as well as impedance spectroscopy. Experimental Methods are then discussed for the electrode design, cellular modeling in COMSOL, fabrication methods, and Labview 8.0 Set-up and programming. Measurements were performed using the single-cell capture device on saline, yeast cells, and a polysterene bead. …

Labeling Of Credence Attributes In Livestock Production: Verifying Attributes Which Are More Than "Meet The Eye", Nicole J. Olynk, Christopher A. Wolf, Glynn T. Tonsor

Journal of Food Law & Policy

Americans are increasingly sensitive to the conditions under which the foods they purchase and consume are produced. It is becoming commonplace for consumers to incorporate perceived environmental impacts, animal welfare concerns, and other process attributes into food purchase decisions. Increased interest in production practices and technologies employed in food production has been seen in the U.S. specifically concerning irradiation, antibiotics, and hormone and pesticide use. Perhaps one of the most controversial technologies employed in food production today is the use of genetic engineering. Not surprisingly, consumers are particularly sensitive about practices employed or technologies used in foods produced specifically for …

Study Of Thermal Frontal Polymerization Utilizing Reactive And Non-Reactive Additives, Veronika Grace Viner

Dissertations

Thermal frontal polymerization is a process that involves a propagating front travelling through a monomer/initiator solution and converting monomer into polymer. The effects of different reactive and non-reactive additives on front temperature, front velocity, and pot life were studied in a thermal frontal polymerization system of multifunctional acrylates. One issue with thermal frontal polymerization of acrylate monomers is the amount of smoke and fumes produced due to high front temperatures. The effect of thermally-expandable microspheres was studied utilizing a variety of monomers. Solid additives including fillers, inert phase changer materials, and high thermal conductive fillers were investigated. The addition of …

Transcript Analysis Of The Cso Operon And Characterization Of Two Sets Of Conserved Bacterial Microcompartment Genes In The Model Organism Halothiobacillus Neapolitanus, Fei Cai

Dissertations

This study was designed to achieve better understanding of (1) how carboxysome genes are regulated and expressed to yield with precise relative ratios and (2) the in vivo roles of two sets of conserved bacterial microcompartment genes, namely the three csoSl and two csoS4 genes of H. neapolitanus, in the biogenesis and function of the carboxysome. For the first goal, a detailed transcriptional profile of carboxysomal genes in H. neapolitanus was established using absolute quantification real-time RT-PCR and transcript ends analysis. This transcriptional profile revealed that a single promoter, denoted cso promoter, was located upstream from the clustered carboxysomal genes. …

A Performance Project With An Historical And Analytical Perspective On The Concerto For Alto Saxophone And Orchestra, Op. 31 By Peter Jona Korn, Brian Sanford Ransom

Dissertations

Peter Jona Korn (1922-1998) is not a name immediately recognized in American music circles, yet during the 1940s and '50s he led a successful career as an American composer. His Saxophone Concerto - composed in 1956 for the virtuoso Sigurd Rascher, and revised by Korn in 1982 - is an important contribution to the saxophone repertoire.

Many composers, including Glazounov, Ibert, and Larsson, wrote concertos for Sigurd Rascher. These works, once considered highly virtuosic, are now studied and performed by college level saxophonists. The original version of Korn's Concerto, among the most technically demanding works, has remained in obscurity for …

Nanophotothermolysis Of Multiple Scattered Cancer Cells With Carbon Nanotubes Guided By Time-Resolved Infrared Thermal Imaging, Alexandru S. Biris, Dorin Boldor, Jason Palmer, William T. Monroe, Meena Mahmood, Enkeleda Dervishi, Yang Xu, Zhongrui Li, Ekaterina I. Galanzha, Vladimir P. Zharov

Faculty Publications

Nanophotothermolysis with long laser pulses for treatment of scattered cancer cells and their clusters is introduced with the main focus on real-time monitoring of temperature dynamics inside and around individual cancer cells labeled with carbon nanotubes. This technique utilizes advanced time- and spatially-resolved thermal radiometry imaging for the visualization of laser-induced temperature distribution in multiple-point absorbing targets. The capability of this approach was demonstrated for monitoring of thermal effects under long laser exposure (from millisecond to seconds, wavelength 1064nm, maximum power 1W) of cervical cancer HeLa cells labeled with carbon nanotubes in vitro. The applications are discussed with a focus …

Cross-Border Banking: Issues In Corporate Governance In Nigeria, Oladimeji Alo

Economic and Financial Review

The article discussed the role of corporate governance in cross-border banking as well as the structure and composition of the board of banks in Nigeria

Cross-Border Banking: Threat Or Opportunity To Economic Growth And Financial Stability, Abiodun Adedipe

Economic and Financial Review

Cross-border banking was a major issue in economic growth and stability of the financial sector until banks became large in size, began to engage in international transactions directly from their home countries and later by establishing or acquiring banks across their borders, and the level of international activities of banks intensified through complex products that increased exposure to systemic risk and possible losses to the economy. There is evidence on both sides to the argument that cross-border banking is both a threat and an opportunity to economic growth and financial stability. This paper argues what must be done to ensure …

Cross-Border Banking: The Road Ahead And Lessons From Emerging Markets In Europe, David Nellor, Salinas Gonzalo

Economic and Financial Review

This paper focuses on the regulatory challenges posed by the growth of cross-border banking, lessons from the emerging markets in Europe. It also highlights that authorities in sub-Sahara Africa, and Nigeria, in particular, could draw from European experience.

Keynote Address At The Cbn Executive Seminar , December 2009, Lamido Sanusi Sanusi

Economic and Financial Review

This is the keynote address delivered by the Governor, Mallam Sanusi, Lamido Sanusi in December 2009 at the CBN Executive Seminar titled "Cross-border banking challenges and implications for monetary management."

Theoretical, Ethical And Strategic Issues In Liberalization And Globalization: The Case Of Cross-Border Banking, Abdul-Ganiyu Garba, M. M. Usman

Economic and Financial Review

The author analysed the fundamental claim of equilibrium theory and the derived claims applied to cross border banking and showed that the claim lack empirical content. It also reviewed recent history of globalization of finance to show that every major banking, currency or sovereign debt banking has been preceded by deepening and widening of financial liberalization.

Cross-Boder Transactions Of Deposit Money Banks And The Issue Of Monetary Control, S.O. Alashi

Economic and Financial Review

The author focused on the activities of the deposit money banks depicted by their deposits and credits. This was particularly the implications of deposits and credits and credits for monetary control in an economy.

The Regulatory Challenges Of Cross-Border Banking In The Era Of Post- Banking Consolidation In Nigeria, Samuel A. Oni

Economic and Financial Review

This article focused on banking reforms in Nigeria; cross-border supervision challenges; government safety-nets; insolvency resolution; early intervention; crisis prevention; capacity building and data integrity.

The Global Financial Crisis: Lesson For Bank Supervisors, Kim Norris

Economic and Financial Review

The author emphasized on the cross-border issues that were learnt as a consequence of the global financial crisis, it provided some high level discussion about some of the international initiatives from standard setters and concluded with risk-based supervision.

Recommendations For National Action Plans On Victim Assistance, Hi

Global CWD Repository

Handicap International has drawn up these recommendations to support stakeholders involved in creating and updating National Action Plans on Victim Assistance throughout the period 2010-2014 in accordance with the Cartagena Action Plan and other international humanitarian and human rights standards. These stakeholders include countries affected by mines/explosive remnants of war (ERW), survivors, disabled persons’ organizations (DPO) and other civil society representatives, international organizations and countries committed to international cooperation.

Cytotoxicity Effects Of Different Surfactant Molecules Conjugated To Carbon Nanotubes On Human Astrocytoma Cells, Lifeng Dong, Colette M. Witkowski, Michael M. Craig, Molly M. Greenwade, Katherine L. Joseph

College of Natural and Applied Sciences

Phase contrast and epifluorescence microscopy were utilized to monitor morphological changes in human astrocytoma cells during a time-course exposure to single-walled carbon nanotube (SWCNT) conjugates with different surfactants and to investigate sub-cellular distribution of the nanotube conjugates, respectively. Experimental results demonstrate that cytotoxicity of the nanotube/surfactant conjugates is related to the toxicity of surfactant molecules attached on the nanotube surfaces. Both sodium dodecyl sulfate (SDS) and sodium dodecylbenzene sulfonate (SDBS) are toxic to cells. Exposure to CNT/SDS conjugates (0.5 mg/mL) for less than 5 min caused changes in cell morphology resulting in a distinctly spherical shape compared to untreated cells. …

Angular Rigidity In 3d: Combinatorial Characterizations And Algorithms, Audrey Lee-St.John, Ileana Streinu

Computer Science: Faculty Publications

Constraint-based CAD software, used by engineers to design sophisticated mechanical systems, relies on a wide range of geometrical constraints. In this paper we focus on one special case: angular constraints in 3D. We give a complete combinatorial characterization for generic minimal rigidity in two new models: line- plane-and-angle and body-and-angle structures. As an immediate consequence, we obtain efficient algorithms for analyzing angular rigidity.

Block Modeling With Multiple Fault Network Geometries And A Linear Elastic Coupling Estimator In Spherical Coordinates, Brendan J. Meade, John P. Loveless

Geosciences: Faculty Publications

Geodetic observations of interseismic deformation provide constraints on the partitioning of fault slip across plate boundary zones, the spatial distribution of both elastic and inelastic strain accumulation, and the nature of the fault system evolution. Here we describe linear block theory, which decomposes surface velocity fields into four components: (1) plate rotations, (2) elastic deformation from faults with kinematically consistent slip rates, (3) elastic deformation from faults with spatially variable coupling, and (4) homogeneous intrablock strain. Elastic deformation rates are computed for each fault segment in a homogeneous elastic half-space using multiple optimal planar Cartesian coordinate systems to minimize areal …

H1n1 Influenza A. Preliminary Evaluation In Hospitalized Patients In A Secondary Care Facility In Saudi Arabia., Tarig S. Al-Khuwaitir, Adnan S. Al-Abdulkarim, Abdullah A. Abba, Amin M. Yousef, Mustafa A. El-Din, Kazi T. Rahman, Mohammed A. Ali, Mohamed E. Mohamed, Nidal E. Arnous

Saudi Medical Journal

OBJECTIVES: To assess the epidemiologic and clinical manifestations of the first wave of H1N1 influenza A patients. METHODS: This study is a retrospective chart review of all patients admitted in King Saud Medical Complex, Riyadh, Kingdom of Saudi Arabia, from 22nd May to 31st August 2009, with a proven diagnosis of H1N1 influenza A. Only patients with a positive nasopharyngeal swab were included, and excluded when the swab was negative. Charts were then analyzed for epidemiological and clinical data. RESULTS: A total of 153 patients with proven H1N1 infection were admitted, with a predominance of male patients (108 [71%]). Most …

Prevalence Of Symptoms And Risk Of Sleep Apnea In Middle-Aged Saudi Women In Primary Care., Ahmed S. Bahammam, Mohammed S. Al-Rajeh, Fatimah S. Al-Ibrahim, Maria A. Arafah, Munir M. Sharif

Saudi Medical Journal

OBJECTIVES: To assess the prevalence of symptoms and risks of obstructive sleep apnea (OSA) in a sample of middle-aged Saudi women in a primary care using a validated questionnaire. METHODS: In this cross-sectional study, trained medical students administered the Berlin Questionnaire to a consecutive random sample of Saudi women in the age group 35-60 years, attending the primary health care center in King Khalid University Hospital, Riyadh, Kingdom of Saudi Arabia, between January and July 2007. Based on the questionnaire, individuals were classified into high-risk and low-risk groups for OSA. RESULTS: Four hundred women with a mean body mass index …