Digital Commons Network^™

Application Of Remote Sensing And Spectroradiometry In Geological Mapping: A Case Study Of Handeni (Qds 148) Block, Eastern Mozambique Belt, Tanzania, Masota M. Magigita, Elisante Mshiu, Cassy Mtelela

Tanzania Journal of Science

This study applies remote sensing (RS) as a geologic mapping aid tool , using Handeni Block of Tanzania as a case study. To achieve the objective of this study, we have utilized various RS processing and image enhancement techniques on multispectral data, including ASTER, Landsat 5, Landsat 8, and Sentinel 2A. The method proved successful whereby both Landsat-5-data with band combination (BC) 7:4:2 and 7:5:4 and band ratio (BR) 5/3:5/1:7/5 and Landsat-8 data with BCs 5:6:7 and 7:6:4 mapped out marble units. Sentinel 2A data (with BC 8:11:3, BRs 12/2:11/2:8/11; 12/4:11/3:11/2 and 12/4:12/2:11/3) together with image enhancement decorrelation stretch on …

Micro Machining Of A Si3n4/Sio2/Ti/Pt Hotplate And Its Ir Emissivity Properties, Egidius R. Rwenyagila

Tanzania Journal of Science

This paper presents the fabrication processes for a Si3N4/SiO2/Ti/Pt membrane based micro hotplate (MHP) using photolithography (PL) micro-machining techniques. The properties of the MHP filament are investigated and overall performance characteristics with regard to infrared (IR) radiation emissivity, resistance, breakdown voltage, and temperature of the fabricated Si3N4/SiO2/Ti/Pt micro heater. During characterization, the results show the device breakdown voltage of 24.24 V corresponding to the optimum operation temperature of ~ 1730.30 K. The device also showed an emissivity value of 5.2% with ~ 7% efficiency of transforming electrical power to IR thermal radiation power. The relationship between temperature and resistance, behaviour …

Woody Plant Assemblages Of Recently Declared Village Land Forest Reserve In The Eastern Afromontane Biodiversity Hotspot, Samora Macrice Andrew

Tanzania Journal of Science

Understanding of species composition of village land forest reserves and their driving factors informs adequate development of effective restoration strategies and sustainable forest management of miombo woodlands. This study assessed the effects of human disturbance as well as environmental variables on woody plant species composition using 24 square plots of 10 x 10 m in a recently declared village land forest reserve in the Eastern Afromontane biodiversity hotspot of Tanzania. Ordination analysis technique canonical correspondence analysis was used to identify important vegetation gradients and significant factors that explain the spatial variation in species composition of woody plants. Results showed that, …

Preparation Of 2d Tungsten Diselenide (Wse2) Thin Films By Selenization Of Dc-Sputtered W Precursors, Lwitiko P. Mwakyusa

Tanzania Journal of Science

Two-dimensional layered transition metal dichalcogenides based on WSe2 films demonstrated promising properties for nano-electronics and photovoltaic applications. In this work, WSe2 films were prepared by selenization of DC-sputtered W precursors. The influence of the selenization temperature on the structural, morphology, and optical properties of the WSe2 films was investigated. The selenization temperature was varied from 350 °C to 450 °C at the interval of 50 °C. Structural, morphology and optical properties of the WSe2 were investigated using X-ray diffractometry (XRD), Atomic Force Microscope (AFM), and UV-VIS-NIR spectrophotometer, respectively. XRD analysis revealed that all WSe2 were polycrystalline and exhibited the co-existence …

Woody Species Composition, Structure, Regeneration Status And Carbon Storage Of Mkulazi Forest Reserve In Tanzania, Ezekiel E. Mwakalukwa, Christoganus John, Paulo J. Lyimo

Tanzania Journal of Science

Little is known about the status of forest condition and carbon storage potential of Mkulazi forest reserve (MFR) located in Morogoro District, Tanzania. This study was conducted to assess i) woody species composition, richness and diversity, ii) stand structure, iii) regeneration status and iv) carbon storage. Data collection for vegetation involved establishment of 100 concentric circular sample plots in the forest area of 65,710 ha. A total of 54 plant species for trees and shrubs with DBH ≥ 5 cm that belongs to 20 plant families were identified. The diversity of woody species was high (H’ = 3.11), while Stem …

Quantifying The Strength Of The El Niño Southern Oscillation And The Indian Ocean Dipole In Influencing The Ond Rainfall Season In Tanzania, Benjamin William Ongito, Paul T.S. Limbu

Tanzania Journal of Science

The current paper examines the strength of variability between the El Niño-Southern Oscillation (ENSO) and the Indian Ocean Dipole (IOD) in influencing October to December (OND) rainfall over the bimodal rainfall regime of Tanzania. The empirical orthogonal function (EOF), correlation analysis, and composite analysis were used during the data analysis. The results show more rainfall distribution over the western part of the Lake Victoria basin and to the peripheral of the northern coast of the country, thus suggesting that, during the OND rainfall season, the onset starts in the western part of the Lake Victoria basin, then spreads to the …

Gene Flow Between The Wild Rice Species (Oryza Longistaminata) And Two Varieties Of Cultivated Rice (Oryza Sativa) In Kilombero District, Tanzania, Hashim M. Mangosongo, Emmarold E. Mneney, Bramwel Wanjala

Tanzania Journal of Science

The direction and rate of gene flow between the perennial wild rice species, O. longistaminata and cultivated rice, O. sativa was investigated using nine Microsatellite (SSR) markers. The study involved characterization of parental lines of two cultivated rice varieties and O. longistaminata and their F1 progenies. Presence of crop-specific alleles in the wild species or vice-versa was used as an indicator of occurrence of gene flow between the two species. The study revealed that gene flow between O. longistaminata and each of the two varieties of O. sativa occurs naturally. The direction of gene flow was mainly from the cultivated …

Potential Of Endophytic Fungal Isolates In Improving Productivity And Postharvest Marketable Fruit Qualities Of Tomato, Gabriel Michael, Emmanuel M. Sangu

Tanzania Journal of Science

In Tanzania, low tomato (Solanum lycopersicum) yield and postharvest marketable fruit qualities remain significant limitations for tomato grower’s profit. Seven endophytic fungal isolates from pyrethrum and Lemongrass leaf and or flowers were evaluated to promote tomato productivity and fruit qualities. The isolates were inoculated by priming the seeds in spore suspension, and the variations in the number of germinated seeds, seedling vigour, yield and fruit qualities were compared across the treatments. It was observed that only three isolates induced more than 50% seed germination. Epf1 and Epl1 isolates showed significant promotion of seed germination (F 0.05 (pdf, 23) = 8.121 …

Modelling Spatial Distributions Of Sediments Fingerprinting In The Ruvu Basin Of Tanzania Without Continuous Sediment Monitoring, Charles H. Kasanzu

Tanzania Journal of Science

This study investigates various hinterlands’ contribution of sediments into the sub-basin known as Ruvu that comprises Mindu, Kibungo, Mvuha and Mindu catchments of Morogoro, Eastern Tanzania. An integrated geochemical and isotopic data were used to constrain this. Strategic sampling of basement and silty-sized sediments was conducted and the data were modelled using mass-balance computations. This approach revealed that, more than 70% of suspended sediments in the Mgeta River originate from Kigalamila, Sezima, Kingule, Mafumbo and Kibuko areas. Thus, hills north of Kisaki are major contributors of sediments with less contribution from the southern terrain. After modelling of the data from …

Turmeric Dyeing Of Cotton Fabrics Using Tie-Dyeing Techniques, Pendo Bigambo, Happiness Wellah, Hadija Ngaga, Safina Kimbokota, Mbonea Mrango

Tanzania Journal of Science

Tie-dyeing is a resist-dyeing technique which for years has been used by SMEs to produce attractive textile fabrics. However, the technique is challenged by the use of synthetic dyes which are not environmentally friendly and the growing consumers’ environmental awareness. Accordingly, researchers and industrialists are forced to explore the alternative natural dyes in response to the above challenges. Among the natural source of dyes available abundantly in Tanzania, but are yet to be fully exploited for applications via tie-dyeing technique are turmeric (Curcuma longa L.) roots commonly used for food coloring. In this study turmeric roots were investigated for their …

Potential Of Endophytic Fungal Isolates In Improving Productivity And Postharvest Marketable Fruit Qualities Of Tomato, Gabriel Michael, Emmanuel M. Sangu

Tanzania Journal of Science

In Tanzania, low tomato (Solanum lycopersicum) yield and postharvest marketable fruit qualities remain significant limitations for tomato grower’s profit. Seven endophytic fungal isolates from pyrethrum and Lemongrass leaf and or flowers were evaluated to promote tomato productivity and fruit qualities. The isolates were inoculated by priming the seeds in spore suspension, and the variations in the number of germinated seeds, seedling vigour, yield and fruit qualities were compared across the treatments. It was observed that only three isolates induced more than 50% seed germination. Epf1 and Epl1 isolates showed significant promotion of seed germination (F 0.05 (pdf, 23) = 8.121 …

Synthesis Of Template-Free Flower-Like Zno Nanorods Using A Simple Chemical Bath Technique, Benard S. Mwankemwa

Tanzania Journal of Science

Flower-like ZnO nanorods were successfully synthesised using a template-free, low-temperature chemical bath deposition method. The effects of growth time on the structural, morphological, and vibrational properties of flower-like zinc oxide were investigated. X-ray diffraction (XRD) and scanning electron microscopy (SEM) indicated that the crystallite size and density of flower-like ZnO nanorods increased with increasing growth time. Raman spectroscopy confirmed the existence of specific Raman modes that correspond to the wurtzite structure of ZnO. In addition, Raman measurements revealed that increased growth time increases the Raman modes intensity of the flower-like ZnO nanorods. Moreover, the measurements of the Au/ZnO nanorods/FTO Schottky …

A Scoping Review Of The Practicality Of Participatory Budgeting In Rural Tanzania, Kenny Manara

BISNIS & BIROKRASI: Jurnal Ilmu Administrasi dan Organisasi

The current framework of participatory budgeting (PB) in Tanzania refers to the Opportunities and Obstacles to Development (O&OD) methodology. However, this policy tool seems to pay little attention to the rural-urban dichotomy, thus raising questions regarding its practicality in marginalized, rural areas. This article synthesized evidence based on the practicality of PB under the O&OD methodology in rural Tanzania to provide insights for decision-makers and practitioners at relevant levels of government. Employing a scoping study approach, the included publications consisted of policy studies (n = 6), academic papers (n = 8), and journal articles (n = 7), all of which …

The Evolution Of The Pan African Women’S Organization (Pawo): A Case Study Of Women’S Involvement In Pan-Africanism, Shukri Abdirahman Mohamed

Theses - ALL

The thesis investigates how PAWO has engaged with and defined African cultural values and practices, while also examining the social and political challenges it has faced and its prospects as a social and political organization. The research explores the formation of PAWO during liberation movements in Africa, when women played pivotal roles in the creation of new nations. As the continent transitioned from liberation movements to government development, PAWO underwent significant transformations influenced by socioeconomic events and social developments. Key factors shaping PAWO's evolution include the emergence of "femnocrats" as women gained formal political roles, a decline in local women's …

The Known History And Movements Of The Roseate Tern Sterna Dougallii In South Africa And The Western Indian Ocean, A. J. Tree

Marine Ornithology

No abstract provided.

Indigenous Peoples And Local Communities Report Ongoing And Widespread Climate Change Impacts On Local Social-Ecological Systems, Victoria Sharakhmatova, Victoria Reyes-García, David García-Del-Amo, Santiago Álvarez-Fernández, Petra Benyei, Laura Calvet-Mir, André B. Junqueira, Vanesse Labeyrie, Xiaoyue Li, Sara Miñarro, Vincent Porcher, Anna Porcuna-Ferrer, Anna Schlingmann, Christoph Schunko, Ramin Soleymani, Adrien Tofighi-Niaki, Mariam Abazeri, Emmanuel M.N.A.N. Attoh, Ayansina Ayanlade, Julia Vieira Da Cunha Ávila, Daniel Babai, Rodrigo C. Bulamah, Joao Campos-Silva, Rosario Carmona, Julián Caviedes, Rumbidzayi Chakauya, Mouna Chambon, Zhuo Chen, Fasco Chengula, Esther Conde, Aida Cuní-Sanchez

Faculty Publications

The effects of climate change depend on specific local circumstances, posing a challenge for worldwide research to comprehensively encompass the diverse impacts on various local social-ecological systems. Here we use a place-specific but cross-culturally comparable protocol to document climate change indicators and impacts as locally experienced and analyze their distribution. We collected first-hand data in 48 sites inhabited by Indigenous Peoples and local communities and covering all climate zones and nature-dependent livelihoods. We documented 1,661 site-agreed reports of change corresponding to 369 indicators. Reports of change vary according to climate zone and livelihood activity. We provide compelling evidence that climate …

A New Extinct Species Of Malagodon (Cyprinodontiformes: Pantanodontidae) From Southeastern Coastal Madagascar, With A Discussion Of Its Phylogenetic Relationships And A Redescription Of The Genus., E. M. Carr, R. P. Martin, J. S. Sparks

School of Natural Resources: Faculty Publications

No abstract provided.

Lissencephaly With Subcortical Band Heterotopia In An East African Child: A Case Report, Elisamia Ngowi, Adil Datoo, Pilly Ally, Hajaj Salum, Kija Edward

Paediatrics and Child Health, East Africa

Lissencephaly is a rare neuronal migration defect that results in a smooth cerebral surface, mental retardation, and seizures. It is diagnosed primarily by correlating clinical manifestations with MRI findings. We present a case of a 3-year-old girl with developmental delay and seizures. Her first seizure was at 14 months and MRI showed features of lissencephaly and subcortical band heterotopia. Lissencephaly is associated with gene mutations. Treatment focuses on antiseizure meds and physiotherapy to reduce seizures and improve motor skills. This case report highlights the importance of promptly diagnosing the LIS/SBH spectrum to enhance patient outcomes. Timely identification and treatment, such …

Inequalities In Use Of Hospitals For Childbirth Among Rural Women In Sub-Saharan Africa: A Comparative Analysis Of 18 Countries Using Demographic And Health Survey Data., Manuela Straneo, Claudia Hanson, Thomas Van Den Akker, Bosede Afolabi, Anteneh Asefa, Alexandre Delamou, Mardieh Dennis, Luis Gadama, Nyika Mahachi, Welcome Mlilo

Centre of Excellence in Women and Child Health

Introduction; Rising facility births in sub-Saharan Africa (SSA) mask inequalities in higher-level emergency care— typically in hospitals. Limited research has addressed hospital use in women at risk of or with complications, such as high parity, linked to poverty and rurality, for whom hospital care is essential. We aimed to address this gap, by comparatively assessing hospital use in rural SSA by wealth and parity.

Methods; Countries in SSA with a Demographic and Health Survey since 2015 were included. We assessed rural hospital childbirth stratifying by wealth (wealthier/poorer) and parity (nulliparity/high parity≥5), and their combination. We computed percentages, 95% CIs and …

Clinical Characteristics And Outcomes Of Patients With Idiopathic Intracranial Hypertension In East Africa: A Retrospective Cross-Sectional Study, Zian Muikamba

Master of Internal Medicine

Introduction; Idiopathic intracranial hypertension (IIH) is a neurological condition characterized by elevated intracranial cerebrospinal fluid (CSF) pressure without demonstratable evident causes. The mechanisms leading to a particular predilection for women of childbearing age who are overweight and obese or who have recent rapid weight changes remain imprecisely described. The Modified Dandy criteria is used for diagnosis and includes-clinical symptoms, papilledema, lumbar puncture (LP) opening pressure, and neuroimaging. If undiagnosed, it can progress to disabling irreversible visual loss. Weight loss is useful in addition to medical therapy in treating the condition. Data in Sub-Saharan Africa is scarce.

Methods; This study described …

Mandatory Second Opinion To Reduce Caesarean Section Rate Among Low-Risk Pregnant Women At A Private Tertiary Hospital: An Analysis Using Who Robson Classification., Gregory Ntiyakunze

Master of Obstetrics and Gynecology

v> The caesarean section rate has increased globally, even among low-risk obstetric deliveries. Consequently, mothers and babies are exposed to potential complications associated with caesarean sections. Therefore, the World Health Organization has introduced measures to reduce unnecessary caesarean sections, including a globally accepted classification system for all deliveries Robson's system and recommended safe non-medical interventions, such as mandatory second opinions prior to caesarean sections

Knowledge And Perception Of Hand Hygiene And Associated Factors Among Final Year Medical And Nursing Students In Dar Es Salaam Tanzania, Anthony Baltazary Ngowi

Master of Obstetrics and Gynecology

Hand hygiene, when practiced correctly and consistently is a simple and effective

method to prevent healthcare associated infections. These infections are acquired during a patients’ hospital stay and pose a major worldwide public health problem. The knowledge and practices related to hand hygiene among health workers need to be instilled early on during their training to develop a culture of correct and consistent practice. Existing literature has explored hand hygiene among health workers but very few studies have looked at it amongst medical and nursing students, who are the healthcare workers of tomorrow. This study aimed to assess hand hygiene …

Challenges In Post Graduate General Surgery Training In Tanzania: A Trainee’S Perspective, Shabbir Adamjee

Master of Surgery

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General Surgery residency training is a complex vigorous program which includes long working hours and complex surgical cases, in order to develop and attain the knowledge and the skills the trainee needs by the end of the program. Worldwide, general surgery programs have high attrition rates and residents have identified challenges which may be work related, related to social wellbeing and/or the residency program structure. Tanzania has public and private institutions providing general surgery residency training and although most have a quality assessment program the data is not readily available. Each institution has its personalized curriculum with its unique …

Microbial Profile And Antimicrobial Resistance Patterns Of Surgical Intra-Abdominal Infections At A Tertiary Hospital In Tanzania A Retrospective Cross-Sectional Study, Abduel Julius Kitua

Master of Surgery

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Among infections of surgical importance, intra-abdominal infections prevail among the most common in surgical patients with considerable morbidity and mortality. The ever-rising microbial resistance to commonly available antibiotics and geographical variations in microbial profile and resistance patterns poses a challenge to the management of these surgical infections of abdominal origin. The aim of this study was to evaluate microbiological characteristics and antibiotic susceptibility of isolates from intra-abdominal infections at a tertiary hospital in Tanzania and how these influence early treatment outcomes.

Exploring The Integration Of Neuroeducation Principles In Teaching Mathematics In Selected Secondary Schools In Iringa Municipality, Tanzania., Emmanuel Kahise

Master of Education

This research explored the integration of neuroeducation principles in the mathematics curriculum of secondary educational institutions in Iringa Municipality, Tanzania, driven by the goal of enhancing learning outcomes and refining instructional strategies. Employing a qualitative case study methodology, the study examined teachers' perspectives, the actual implementation of neuroeducation concepts in classrooms, and the challenges encountered during integration. Through observations of form one and form three classes and interviews with three mathematics teachers, inconsistencies between claimed understanding and actual practices were identified. To address issues such as a lack of instructional resources, restricted technology access, and limited professional growth opportunities, specific …

Integrating Digital Literacy Skills Into Chemistry Assessment In Secondary Schools: A Case Study Of Lindi Municipal, Tanzania, Francis Gaspar Sasu

Master of Education

In an era dominated by technology, the demand for digital literacy skills is ever-growing. As technology continues to shape our lives, the need for proficiency in digital literacy extends beyond mere usage, becoming crucial in both learning and assessment contexts. This study addresses the need to bridge the gap between traditional assessment practices and the demand for digital literacy skills in 21st-century education contexts, with a focus on secondary school chemistry assessments in Lindi Municipal, Tanzania.The study enlisted a qualitative approach and case study design in which four secondary schools within Lindi municipal were involved. It utilized diverse data collection …

Exploring The Contribution Of Multimedia Resource Integration On Learner Engagement In Teaching And Learning Of Integrated Science In A Primary School In Arua City -Uganda, Sebbi Sadadi Okumu

Master of Education

The integration of multimedia resources in primary school classrooms has become essential in the twenty-first century, given the huge potential of information and communication technology (ICT). This qualitative case study aimed to explore the contribution of multimedia resource integration on learner engagement in the teaching and learning of integrated science in a primary school in Arua City, Uganda.

The primary research question addressed the contribution of multimedia integration to learner engagement in integrated science instruction. Additionally, subsidiary inquiries explored into the types of multimedia resources employed, learner responses to their utilization, teachers' perceptions, and the relationship between teachers' perceptions and …

Towards Unleashing The Potential Of Ai In Education; Exploring Educators' Perceptions And Practices In Tanzania (The Case Study Of Two Districts In Coastal Region, Tanzania)., Luciana Marwa Hanson

Master of Education

As AI adoption in education progresses globally, understanding educators' viewpoints is crucial for effective integration in specific contexts like Tanzania. This study was an exploration of the adoption of Artificial Intelligence (AI) in education, focusing on the Tanzanian context. It aimed to understand educators' perceptions and practices regarding AI integration in education. The research objectives include exploring the potential benefits and challenges of AI integration, as well as understanding educators' attitudes and intentions toward AI adoption. Guided by the Technology Acceptance Model, the study utilized a qualitative case study approach involving interviews, FGDS, and observations with 10 students, 10 educators …

Teachers’ Assessment Practices In An Inclusive Refugee Setting: An Exploration Of How It Influences The Learning Of Learners With Disabilities., Julius Odongo Mireri

Master of Education

Assessments play a pivotal role in determining learning outcomes and educational experiences for refugee learners with disabilities (RLWD). However, their circumstances present unique challenges to traditional assessment practices. This study explored how teachers' assessment approaches influence learning for RLWD enrolled in an inclusive refugee school in Kakuma Kenya. The objectives were to examine how assessments are adapted to meet diverse learner needs, investigate how the refugee context shapes assessment practices, determine how assessments influence learning, and identify challenges faced in assessment. A qualitative case study design was employed. Data collection methods included individual interviews with 8 teachers and the head …

Factors Associated With Antiretroviral Drug Resistance Mutations Among Plhiv Failing To Achieve Virological Suppression On Second Line Treatment In Tanzania., Mabula M. Mabelele

Master of Internal Medicine

v> Human Immunodeficiency Virus / Acquired Immunodeficiency Syndrome (HIV/AIDS) is a major public health problem affecting an estimated 38.4 million people globally, with the (54%) of them being from the Eastern and Southern African regions. Despite progress in the availability of multiple classes of antiretroviral drugs and early initiation of treatment with cART, many patients still fail therapy in the first and second-line regimens due to drug resistance driven by continuous acquisition of drug resistance mutation (DRMs). DRMs are high among adults failing treatment regimens, ranging between 50-97%.