Digital Commons Network^™

Assessment Of The Effect Of Acid Activation Of Kaolin From Malangali On Water Defluoridation, Hosea Shuma, Lupituko Mkayula, Yahya Makame

Tanzania Journal of Science

Malangali kaolin clay was activated by means of an acid for defluoridation studies. The Acid Activated Malangali Kaolin (AAMK) clay and the Untreated Malangali Kaolin (UMK) were both characterized using spectroscopic and adsorption techniques. BET analysis of AAMK and UMK showed that both clays have mesoporosity characteristics with surface areas ranging from 55 to 58 m2/g. Spectroscopic studies showed that in both clays the major mineral forms are kaolinites and albites with high amounts of SiO2 and Al2O3. AAMK and UMK are endowed with surface functional groups such as OH, Si–O–Si, and Al–O–Al all of which being suitable for adsorption …

Densification Behaviour And Structural Properties Of Niobium And Lanthanum-Doped Lead Zirconate Titanate And Lead Barium Zirconate Ferroelectrics For Low-Donor Dopants Concentrations, David Bahati, Ismael Makundi

Tanzania Journal of Science

In this paper we report the densification behaviour and structural properties of niobium and lanthanum-doped lead zirconate titanate (PZT) and lead barium zirconate (PBZ) ferroelectrics for low additive concentrations (0–2%). The PZT materials were calcined at 800 °C and sintered at 1200 °C while the PBZ materials were calcined at 850 °C and sintered at 1250 °C. Densification behaviour revealed that materials with lanthanum or niobium additives of greater than 0.5% for PZT and 0.2% for PBZ achieved complete densification. A strong distortion was observed in lattice parameters for lower dopants in which PBZ doped materials showed higher lattice distortions …

Multivariate Assessment Of Metal Contamination In Mtoni Sedimentary Environment, Tanzania, Matobola Mihale

Tanzania Journal of Science

Enrichment factor, geo-accumulation factor, contamination factor, degree of contamination, modified degree of contamination and potential contamination index were applied to assess the contamination of metals (Al, Cr, Mn, Fe, Ni, Cu, Zn, As, Cd and Pb ) in the Mtoni estuary sediments in Dar es Salaam, Tanzania. The sediment samples were sampled as appropriate, treated using established methods and analysed using inductively coupled plasma-high resonance mass spectrometry. The calculated enrichment factor values indicated contamination varying from minor (EF > 1) to severe contamination (EF > 50). The determined geo-accumulation index, contamination factor, degree of contamination, modified degree of contamination and potential contamination …

Prediction Of Wind Power Density For Electricity Generation At Makambako, Tanzania Using Auto-Regression Integrated Moving Average (Arima) Model, Josam Samson, Reuben Kainkwa

Tanzania Journal of Science

Wind speed data used in this study were from Makambako and were recorded at a height of 10 m. In the analysis, the data were extrapolated to 80 m above ground level and wind speed from July to November were found to have an average value of 17.58 m/s. November was found to be the windiest month for the whole duration while the calm month was found to be March. The wind power density was found to be highest in the month of November for the whole study duration. The months of July to November have higher wind power density …

Evaluation Of The Influence Of Additional Beam Filtration On Image Quality And Patient Dose In X-Ray Fluoroscopy Procedures, Justin Ngaile, Peter Msaki, Ramadhani Kazema, Jerome Mwimanzi, Mechris Mango

Tanzania Journal of Science

The aim of the study was to evaluate the influence of additional filtration on radiation dose and image quality for patients during hysterosalpingography (HSG) and retrograde urethrography (RUG) procedures. The influence of filtering on image quality for each phantom thickness was made using a combination of different filter thicknesses. Entrance surface air kerma (ESAK) rates to Perspex phantom were measured using a solid state detector for various added combination of filter materials. Fluoroscopic image contrast was assessed using a Leeds TOR-18FG test object with a range of filter materials and phantom thicknesses. Phantom studies demonstrated that the use of additional …

Urban (Un)Planning And Social Vulnerability In The Context Of Rapid Urbanization And Data Constraints: A Quantitative Study Of Dar Es Salaam, Tanzania., Sheliza Bhanjee

Electronic Theses and Dissertations

This dissertation explores intersections between vulnerability and urban planning in Sub-Saharan Africa, where distinct forms of urbanization are occurring and where there are significant data constraints limiting local studies and urban assessments in the region. The three studies which make up this dissertation offer methodological and theoretical pathways toward examining and measuring the influence of urbanization and planning factors on vulnerability of urban populations in the region. The first study is a literature review and examines existing literature for vulnerability conceptualization in urban environments, the notion of ‘urban vulnerability’, and roles of urban planning and related factors in relation to …

Explore Barriers Associated With Not Testing For Hiv Among Men Who Have Sex With Men In Dodoma, City, Tanzania, Maria M. Mushi

Capstone Experience: Master of Public Health

Goal

The goal of the project is to explore barriers associated with not testing for HIV among men who have sex with men (MSM) in Dodoma City, Tanzania.

Objectives

In order to achieve the goal of exploring barriers associated with not testing for HIV among MSM, I will plan and conduct the study, analyze the data, and prepare the final research report.

Methods

A qualitative descriptive study will be conducted in Dodoma City, Tanzania. A total of 10 MSM 19 years of age and above will be purposefully selected by 3 peer educators to be part of the study. I …

Cervical Cancer In Tanzania: A Systematic Review Of Current Challenges In Six Domains., Ava S Runge, Megan E Bernstein, Alexa N Lucas, Krishnansu S Tewari

Articles, Abstracts, and Reports

Cervical cancer is the most common cancer in Tanzania. After excluding human immunodeficiency virus, lower respiratory infections, malaria, diarrheal diseases, and tuberculosis, cervical cancer kills more women than any other form of illness in the country. Unfortunately, Tanzania has a low doctor-to-patient ratio (1:50,000) and nearly 7000 women die each year from this disease. The clinical problem is further magnified by the country's lack of resources and prevailing poverty, sporadic cervical cancer screening, prevalence of high-risk oncogenic human papillomavirus subtypes, and relatively high rates of human immunodeficiency virus co-infection. In recent years, addressing the cervical cancer problem has become a …

Same Polytechnic College: Structural Design Exploration, Emma Morley

Architectural Engineering

The Same Polytechnic College is a response to a lack of vocational training and higher learning opportunities for residents of Same, Tanzania and surrounding areas. The College will address the region’s need for skilled farmers, builders, teachers, and entrepreneurs by providing a pathway from secondary school graduation to continued education. This will generate a framework that strengthens the East African economy by supplying the region with educated professionals that make impactful contributions to society.

Construction will occur following a five-phase development plan, and the buildings will utilize simple but effective architectural techniques and modular structural design. These solutions are low-cost …

Availability And Access Of Electronic Information Resources To Medical Library Users In Universities In South-South, Nigeria, Ogwo Uzoamaka, Nwachukwu Ndubuisi Victor Professor

Library Philosophy and Practice (e-journal)

The paper examined the extent of availability and accessibility of electronic information resources to medical library users in south-South, Nigeria universities. The study adopted descriptive survey design to assess the availability of different types of electronic information resources and their accessibility to different categories of medical library users. The total population of the study comprised 226 medical library users of four federal universities in the south-South, Nigerian universities. Four (4) research questions guided the study. Data were collected through a structured questionnaire instrument. The Data were analysed using descriptive statistics of percentages, mean and standard deviations. The criterion mean of …

"Courage 2 Test": An Evaluation Of A Social Media Marketing Campaign To Increase Hiv Testing Among Young Black Men, Jamal T. Jones, Laura F. Salazar, Richard A. Crosby

Journal of Health Disparities Research and Practice

The purpose of this study was to evaluate a social media marketing (SMM) campaign designed to increase HIV testing among young Black men attending a public university in Atlanta, GA. “Courage 2 Test” was a three-month SMM campaign (launched from February 2017 to April 2017) that included targeted Facebook and Instagram advertisements to encourage HIV testing. Students completed an online survey via two cross-sectional samples (n=106 at baseline and n=98 post campaign). Campaign evaluation involved assessing the effects of campaign exposure and the pre/post-grouping variable on ever testing for HIV and testing for HIV in the previous six months via …

Age Of Concrete : Housing And The Shape Of Aspiration In The Capital Of Mozambique, David Morton

Ohio University Press Open Access Books

Age of Concrete is a history of the making of houses and homes in the subúrbios of Maputo (Lourenço Marques), Mozambique, from the late 1940s to the present. Often dismissed as undifferentiated, ahistorical “slums,” these neighborhoods are in fact an open-air archive that reveals some of people’s highest aspirations. At first people built in reeds. Then they built in wood and zinc panels. And finally, even when it was illegal, they risked building in concrete block, making permanent homes in a place where their presence was often excruciatingly precarious.

Unlike many histories of the built environment in African cities, Age …

User Preference On Use Of Print And Electronic Resources In Selected Universities In Tanzania: A Survey., Athumani Samzugi

Library Philosophy and Practice (e-journal)

A descriptive survey method was used as the research design, which involved three sampled universities in Tanzania,namely the University of Dar es Salaam (UDSM), the Open University of Tanzania (OUT) and Tumaini University-Dar es Salaam College (TUDARco). Purposive sampling technique was used to select respondents, comprising undergraduate and post-graduate students, academic and research staff chosen due to their proximity and degree of involvement in the generation and usage of information in both print and electronic formats in their academic and research endeavours as well as consultancy. Empirical data for the study was collected using the questionnaire survey and interview guide. …

Reasons For Delay In Seeking Treatment Among Women With Obstetric Fistula In Tanzania: A Qualitative Study, Mary Lyimo, Idda H. Mosha

School of Nursing & Midwifery, East Africa

Background: Obstetric fistula is among the serious and distressing maternal morbidities in Tanzania. Obstetric fistula is a childbirth-related injury caused by prolonged and obstructed labor which has a devastating impact on affected women and their families. The aim of this study was to explore reasons why women with obstetric fistula admitted to the Comprehensive Community- Based Rehabilitation in Tanzania (CCBRT) hospital delayed seeking fistula treatment.

Methods: This exploratory study incorporated qualitative approach. In-depth interviews were used to collect data from 18 women with obstetric fistula admitted to CCBRT hospital. The interviews were conducted in Kiswahili and lasted for 40–45 min. …

Physical Function And Fatigue In Older Hiv Adults In San Francisco, Usa, Soson Jong

International Nursing Research Congress (INRC)

Older HIV patients experience a variety of symptom including fatigue and lack of energy. A study conducted among older HIV patients in San Francisco, USA found that increasing physical activity (using Fitbit device) helps to improve fatigue and low energy symptoms.

Willingness To Pay Of Nigerian Poultry Producers And Feed Millers For Aflatoxin-Safe Maize, Andrew M. Johnson, Tahirou Abdoulaye, Bamikole Ayedun, Joan R. Fulton, Nicole Olynk Widmar, Akande Adebowale, Ranajit Bandyopadhyay, Victor Manyong

Department of Agricultural Economics Faculty Publications

Dietary aflatoxin exposure is a widespread problem in the developing world and causes severe negative health consequences to humans and livestock animals. A new biological control product, called Aflasafe, has been introduced in Nigeria to mitigate aflatoxin contamination of maize in the field and in storage. No known prior work has estimated how much African agribusinesses using maize for animal feed will pay for aflatoxin-safe maize. This study measured the levels of Aflasafe awareness, surveyed current aflatoxin management practices, and estimated, using choice experiments, willingness to pay (WTP) for aflatoxin-safe maize by Nigerian poultry producers and feed millers. Data was …

Mandala Summer 2019, Center For Southeast Asian Studies

Mandala

No abstract provided.

Clinical Emergency Care Research In Low-Income And Middle-Income Countries: Opportunities And Challenges, Adam R. Aluisio, Shahan Waheed, Peter Cameron, Jermey Hess, Shevin Jacob, Niranjan Kissoon, Adam C. Levine, Asad Mian, Shammi Ramlakhan, Hendry R. Sawe, Junaid Razzak

Department of Emergency Medicine

Disease processes that frequently require emergency care constitute approximately 50% of the total disease burden in low-income and middle-income countries (LMICs). Many LMICs continue to deal with emergencies caused by communicable disease states such as pneumonia, diarrhoea, malaria and meningitis, while also experiencing a marked increase in non-communicable diseases, such as cardiovascular diseases, diabetes mellitus and trauma. For many of these states, emergency care interventions have been developed through research in high-income countries (HICs) and advances in care have been achieved. However, in LMICs, clinical research, especially interventional trials, in emergency care are rare. Furthermore, there exists minimal research on …

Position Statement:Emerging Genetic Therapies For Rare Disorders, Pauline Samia, Adam Kirton, Russell Dale, Silvia Tenembaum, Chahnez Charfi Triki, Anaita Hegde, Richard Idro, Jo M. Wilmshurst, Ingrid Tein, Haluk Topaloğlu

Paediatrics and Child Health, East Africa

Emerging genetic therapies for rare disorders at high cost, cannot realistically address the global burden of disease. Stakeholders must develop new pathways to ensure safe, fair and sustainable provision of such therapies.

Modeling Green Ebusiness Adoption Among Small And Medium Tourism Enterprises In Tanzania, Juma James Masele

The African Journal of Information Systems

This study was set to model Green eBusiness adoption among SMTEs in Tanzania, right from sourcing, operations, and to end-of-life-management. The study employed the use of Structural Equation Modeling (SEM) to analyze quantitative data collected from 240 respondents selected from 80 SMTEs in Dar es Salaam, Kilimanjaro, Arusha, and Zanzibar, who were in operations for at least three years. Although there were twelve hypotheses formulated, only seven hypotheses (with constructs Self-Efficacy, Effort Expectancy, Facilitating Conditions, Coercive Pressures, Intention to Use both to commitment and to Green eBusiness, and Commitment towards Green eBusiness adoption) were revealed significant. Others (with constructs Performance …

Research Strategy 2019-2023 : Medical College And School Of Nursing & Midwifery - East Africa, Office Of The Research

Office of Research and Graduate Studies

Content

- Background

- AKU Medical College and School of Nursing & Midwifery in East Africa

- AKU MC/SONAM East Africa Academic Plan

- Research and Graduate Programs

- SWOT Analysis of AKU-MC/SONAM

- Vision, Mission and Core Values

- Strategic Objectives

- Monitoring and Evaluation

Use Of Web Resources By The Postgraduate Students Across Genders, Nahida Nasreen, Bisma Bashir, Ufaira Yaseen

Library Philosophy and Practice (e-journal)

Purpose: The study seeks to elicit information on gender difference with regards to the familiarity with IT, Search Engines, Automated Library Services and Electronic Information Resources. It also aims to determine the frequency of use of various Automated Library Services and Electronic Information Resources and the influence of the Internet on the information seeking behavior of the postgraduate students.

Methodology: The study adopted a survey method administering the well-structured questionnaire. The questionnaires were distributed with equal proportion based on gender among 208 PG students of science and social science faculty selected by stratified random sampling technique.

Findings: The study revealed …

The Comparative Analysis Of The Performances Of Four And Six Pole Pairs Permanent Magnet Synchronous Generator, Ra Msuya

Tanzania Journal of Engineering and Technology (TJET)

Wind power applications using multi-poles permanent magnet generators have become very attractive especially in small ratings. Low-speed multi-pole PM generators are maintenance-free and may be used in different climate conditions. Most of the low speed wind turbine generators presented is permanent magnet machines, which have advantages of high efficiency and reliability since there is no need of external excitation and conductor losses are removed from the rotor. From the study two types of PM AC generator are designed with 6 pole pairs and the other one with 4 pole pairs. These generators were designed and analysed using Maxwell software. The …

Linking Quality Management Practices With Performance Of Manufacturing Industries In Tanzania, Mussa Iddi Mgwatu Dr.

Tanzania Journal of Engineering and Technology (TJET)

Local products of manufacturing industries in Tanzania are subjected to intense competition in the markets. Product quality is one of key factors that play a considerable role for manufacturing industries to win the competitive advantage. This paper attempts to analyse the extents of quality management practices (QMP) and manufacturing performance (MP) as well as to examine the linkage between practices and performance. Data was collected from seventy-eight (78) manufacturing industries in Dar es Salaam region using questionnaires comprising of both single-item and multi-item questions. Descriptive statistics was used to quantify the extent of quality management practices and manufacturing performance (MP) …

Influence Of Tempering And Cryogenic Treatment On Retained Austenite And Residual Stresses In Carbonitrided 18crnimo7-6 Low Alloy Steel, Richard Katemi

Tanzania Journal of Engineering and Technology (TJET)

This work investigated the influence of tempering conditions coupled with cryogenic treatment on thermal stabilization of retained austenite and residual stress distributions in carbonitrided 18CrNiMo76 low alloy steel samples. The carbonitriding conditions were set to enable attaining surface carbon and nitrogen content of 0.87 and 0.34 mass.-percent respectively. After carbonitriding, some of the samples were subjected to varying tempering conditions followed by cryogenic treatment at-120 °C using nitrogen gas. Analysis of both retained austenite and residual stresses was conducted using X-ray diffraction. In the as-quenched state, carbonitrided samples contained 52 mass.-percent. Samples that were directly subjected to the cryogenic treatment …

Development Of Improved Characteristic Equations For Lake Rukwa In Tanzania, Patrick Valimba Dr

Tanzania Journal of Engineering and Technology (TJET)

Often Lake Rukwa characteristics have been misreported in literature giving different volumes and surface areas at similar water surface elevations. This study aimed at establishing reliable lake characteristics elevation-area-storage equations for Lake Rukwa by utilising all available data and information to define the bathymetry and derive characteristic equations. A procedure was developed that combines historical lake extents, spot heights from topographical maps and surveyed lake bathymetry to define refined bathymetry to levels it has never reached. It combined spot heights around the lake and selected 13,934 surveyed points (from 107,938 available) within the lake confined by the 820 m land …

Potential Use Of High Rate Algae Ponds For Resource Recovery In The Water-Food-Energy Nexus For Tanzania: A Review, Mary Kayombo

Tanzania Journal of Engineering and Technology (TJET)

The use of High Rate Algal Ponds (HRAPs) for the treatment of wastewater and resource recovery has raised interest in recent years. Treatment of wastewater through this technology has proved to have high efficiency in reducing the level of pollution, nutrients, dissolved solids as well as pathogens. HRAPs are more efficient than conventional Wastewater Stabilization Ponds (WSPs) due to their design approach that provides room for high rate bio-chemical processes, which increase the mechanisms of nutrients and pathogens removal as well as the rate of micro-algae production for purposes of resource recovery. This paper reviews the upgrading potential of existing …

Research Methodology Adopted In Developing Tansse-L System, Ellen Kalinga

Tanzania Journal of Engineering and Technology (TJET)

Research methodology is among the very important part in a research work. It is the heart which describe the activities necessary for the completion of the research work. Research methodology provides a plan of investigation considered to obtain answers to research problems and it depends on the context of application. This paper presents the research methodology adopted when developing Tanzania Secondary Schools e-Learning (TanSSe-L) system, a learning management system (LMS) which was successfully developed through customization of Moodle open source LMS. TanSSe-L system is a context centered platform for secondary schools in Tanzania. TanSSe-L system was developed using a number …

Experimental Study On The Effect Of Moisture On Bolt Embedment And Connection Loaded Parallel To Grain For Timber Structures, Henry Meleki Kiwelu

Tanzania Journal of Engineering and Technology (TJET)

Connections are critical parts of timber structures, transmitting static and dynamic forces between structural elements. The ultimate behaviour of a building depends strongly on the structural configuration and the capacity of its connections. The complete collapse of a building or other less extensive accidents that may occur usually start as a local failure inside or in the vicinity of a joint. The main aim of this study has been to investigate if the short-term capacity of steel-wood dowel joints loaded parallel to the grain is affected by variations in moisture content associated with post fabrication drying or wetting of the …

Nonlinear Direct Torque Control Of Interior Permanent Magnet Synchronous Motor Drive, Jackson Justo

Tanzania Journal of Engineering and Technology (TJET)

This paper presents a nonlinear direct torque control (NDTC) strategy of interior permanent magnet synchronous motors (IPMSMs) for electric vehicle (EV) propulsion. The proposed NDTC scheme applies a nonlinear model of IPMSM to dynamically determine the optimal switching states that optimize the EV drivers’ decision to reduce the workload. Moreover, the proposed NDTC method has a simple control structure and can explicitly handle system constraints and nonlinearities. The performance evaluation is conducted via a prototype IPMSM test-bed with a TMS320F28335 DSP. Comparative experimental results provide the evidence of improvements of the proposed NDTC strategy over the conventional DTC strategy by …