Hall Effect and Temperature Distribution on Unsteady Micropolar Fluid Flow in a Moving Walls

Unsteady incompressible electrically conductin

MHD Mixed Convection Micropolar Fluid Flow through a Rectangular Duct

Mixed convection flow through a rectangular duct with at least one of the sides of the walls of the rectangle being isothermal under the influence of transversely applied magnetic field has been analyzed numerically in this study. The governing differential equations of the problem have been transformed into a system of nondimensional differential equations and then solved numerically. The dimensionless velocity, microrotation components, and temperature profiles are displayed graphically showing the effects of various values of the parameters present in the problem. The results showed that the flow field is notably influenced by the considered parameters. It is found that increasing the aspect ratio increases flow reversal, commencement of the flow reversal is observed after some critical value, and the applied magnetic field increases the flow reversal in addition to flow retardation. The microrotation components flow in opposite direction; also it is found that one component of the microrotation will show no rotational effect around the center of the duct

The Burden of Internal Conflict on Expanded Programs on Immunization in Northwest Ethiopia: Implementation Science Study

AbstractBackground: Despite the rapid progress in immunization service delivery systems worldwide, populations in areas of conflict often have limited or no access to lifesaving vaccines. Hence, evidence generation and translation for context-specific strategies and tailored action would be important, before, during and after an acute humanitarian emergency.Aim: To explore factors affecting immunization service delivery during and after conflict among internally displaced communities in Northwest Ethiopia.Methods: Qualitative and quantitative (record review) methods were applied, phenomenological study design and in-depth interviews were applied to collect the lived experiences of participants in the affected areas. Transcribed and translated data were analyzed and thematized using open code software. A Twenty-four-month record review of quantitative data was analyzed descriptively using an excel sheet to develop immunization coverage trends for tracer antigens.Results: We found that the immunization program had seriously deteriorated during and after the conflict in the study area. The monthly EPI service report in the affected areas showed a decline with the lowest records in December and January when the internal conflict was peak. Security problems, displacement of health workers, destruction of health infrastructures, mixing of the displaced community in the host community and poor coordination among stakeholders and partners, clients having other emergent needs and shortages of resources were important factors for immunization services.Conclusion: Vaccination service delivery was found to have significantly declined in the study area. Security problems affected not only the service utilizers but also the service providers’ wing as well. Coordination of stakeholders and strong leadership systems are crucial in maintaining optimum vaccination service delivery even at the time of conflict. [Ethiop. J. Health Dev. 2021; 35(SI-3):39-48]Key words: Conflict, internally displaced, Immunization service

Implementation fidelity and challenges of optimal cold chain management in Assossa district health system, Benshangul-Gumuz region, Western Ethiopia

AbstractIntroduction: Preventive programs which have proven to be effective in clinical trials may not necessarily impact the health and wellbeing of the community unless they are implemented with fidelity. While cold chain is the backbone of immunization programs, limited studies exist to explain fidelity implementation which likely contributes to a lack of evidence-based instructional practices of cold chain management.Aim: This study aimed to explore the fidelity implementation and challenges of optimal cold chain management in the Benshangul-gumuz region.Methods: A qualitative approach was utilized to explore the underlying challenges to optimum implementation of cold chain management in Benshangul-gumuz region. Observational techniques and key informant interviews with 12 key-informants were conducted. Data was collected at all levels of the health system including, the regional health bureau, Ethiopian Pharmaceuticals Supply Agency hub, district health offices, Health centers, and health posts. Data analysis and interpretation was performed using the framework analysis approach. Open Code 4.02 software was used for analysis.Findings: This study identified three main themes including adherence to intervention, human resource development, and availability and use of resources. The findings also revealed that a significant number of the employees were not adhering to the optimal cold chain management guidelines. Staff development, availability and utilization of equipment and related finances were major fidelity implementation challenges of cold chain management.Conclusions: Across the health facilities under study, implementation fidelity of cold chain management was considered poor. Human resource development, proper allocation and effective management of logistics and related finance could facilitate optimal cold chain management practices, and efforts to save lives through delivery of safe and quality vaccines. [Ethiop. J. Health Dev. 2021; 35(SI-3):03-08]Keywords: Cold chain management, Implementation fidelity, Challenges, Ethiopi

Application of Linear Programming to Analyze Profit of Flour Factory, in the Case of Sanate Flour Factory, at Robe Town

The purpose of this study was to analyze the total production and profit of Sanate flour factory located in Ethiopia, Oromia regional state, Bale zone, Robe town, by applying linear programming. A factory is situated within Robe town about 430 KM, from Addis Ababa (Capital of Ethiopia). Today linear programming was the most popular method of manipulating a large amount of data. Hence, Different studies bring out the necessity of using quantitative techniques for utilization in the factory. So, in this paper to analyze the production and profit of this factory, the study incorporates different steps; the first step is collecting data. A data collecting formats prepared and circulated among factory staff to executive managers, co-managers, sellers, machine operators, and technicians to determine the production, sales, and profit during five months of November 30, 2018- June 18, 2019. In the second step, a collected data is modeled to mathematical form, particularly modeled to linear program. In the third step the mathematical modeled data was solved (analyzed). Finally, depending on the empirical results (the solution of a modeled data) some problem facing the factory was indicated and the solution for the problem has been recommended

How to optimize health facilities and community linkage in order to enhance immunization service? The case of West Amhara Region, Ethiopia

AbstractBackground: Health facility-community linkages are important in designing community-level interventions, appropriate immunization service provision modalities, and changing unhealthy behaviors. However, there is limited evidence on the influence of community and facility linkage on vaccination services in Ethiopia.Aim: This study aimed to explore how the linkage between health facilitiesa and the community could be optimized in order to enhance immunization services.Methods: A Phenomenological study design, using an explanatory approach was applied in the two districts (Shebele Berenta & South Achefer district) of the Amhara region for the month of June , 2020. Forty-six key informants were interviewed using an interview guide and data was analyzed using open code version 4.02. The data was coded, and thematic analysis was applied.Results: The finding revealed that there were community platforms to facilitate community and health facility linkage. Respondents also perceived that the community to health facility linkage was an effective strategy for the Expanded Program on Immunization (EPI) service provision. The study revealed that perception of health care providers, health care providers attitude and practices, shortages of stock (medication and supplies), distance from main road and transportation, irregularity in the implementation of rules and regulations, lack of incentives, inadequate counseling and support, lack of awareness, shortages of human resources and lack of training support for health care workers were barriers for effective community-health facility linkage.Conclusion: The linkage of community and facilities were not approached in the same manner within districts and facilities. Therefore, strengthening a common system for community-health facility linkage and community engagement is critical during immunization services. Establishing a strong strategy of incentivizing mechanisms is vital for the effective implementation of immunization services. An advocacy strategy to mobilize engagement among policy and decision-makers, and other key stakeholders was an important strategy for improving the program. [Ethiop. J. Health Dev. 2021; 35(SI-3):75-85]Keywords: Community, Facility linkage, EPI, Amhara Region, Ethiopi

Assessment of barriers to the implementation of community-based data verification and immunization data discrepancies between health facilities and the community in Tach Gayint district, Northwest Ethiopia.

AbstractIntroduction: While community-based data verification (CBDV) is critical for effective implementation of immunization programs, limited evidence exists detailing its implementation at the local levels thereby threatening data quality which is used to guide decision making.Aim: To explore the barriers to proper implementation of CBDV and determine the level of immunization data discrepancy between the health facilities and community levels in Tach Gayint district of Northwest Ethiopia.Methods: A Mixed methods approach was used. Interviews with twenty-six key informants’ (health experts) in immunization data, and an additional a sample of 324 infants were recruited. All health centers in the district (6) and 2 health posts from each health center (12 in total) were selected using Simple Random Sampling. Key informant interviewees were purposely included from all health facilities. For quantitative data, samples of infants were proportionally allocated for each health facility as per their DPT/Pentavalent-1 vaccine report. Thematic analysis of the qualitative data and descriptive quantitative analysis were performed using statistical software open-code v-4.02 and STATA v14.1 respectively.Results: Only few health facilities implemented CBDV and consider it to be their routine task. Also, barriers to effective implementation of CBDV such as lack of prioritization, poor capacity among health staff, and conflicting job roles were identified. The highest immunization data discrepancy among community and health facilities was observed for the measles-one vaccine (35.4%), and the minimum was for DPT/Pentavalent-1 (25.6%).Conclusion: This study revealed a poor level of CBDV implementation and barriers to its effective implementation which include lack of prioritizing CBDV, limited capacity among health staff in performing CBDV, and conflicting job roles among health staff. There was a high level of immunization data discrepancy for measles-1 and DTP/Pentalent-3 vaccines. Based on our finding, we make the following recommendations: building skills among health workers to perform CBDV, enhancing availability and use of standard CBDV tools, ensuring monitoring, and control mechanism, and setting clear definition of roles regarding CBDV, as well as closing the gap in level of immunization data discrepancy could help foster effective implementation of CBDV. [Ethiop. J. Health Dev. 2021; 35(SI-3):09-15]Key words: Immunization, CBDV, Data discrepancy, Data qualit

Dairy intensification in developing countries:effects of market quality on farm-level feeding and breeding practices

Smallholder dairy production represents a promising income generating activity for poor farmers in the developing world. Because of the perishable nature of milk, marketing arrangements for collection, distribution and sale are important for enhanced livelihoods in the smallholder dairy sector. In this study we examined the relationship between market quality and basic feeding and breeding practices at farm level. We define market quality as the attractiveness and reliability of procurement channels and associated input supply arrangements. We took as our study countries, India with its well-developed smallholder dairy sector, and Ethiopia where the smallholder dairy industry has remained relatively undeveloped despite decades of development effort. We conducted village surveys among producer groups in 90 villages across three States in India and two Regions in Ethiopia. Producer groups were stratified according to three levels of market quality – high, medium and low. Data showed that diet composition was relatively similar in India and Ethiopia with crop residues forming the major share of the diet. Concentrate feeding tended to be more prominent in high market quality sites. Herd composition changed with market quality with more dairy (exotic) cross-bred animals in high market quality sites in both India and Ethiopia. Cross-bred animals were generally more prominent in India than Ethiopia. Herd performance within breed did not change a great deal along the market quality gradient. Parameters such as calving interval and milk yield were relatively insensitive to market quality. Insemination of cross-bred cows was predominantly by artificial insemination (AI) in India and accounted for around half of cross-bred cow inseminations in Ethiopia. Data on perceptions o

Population Genomics of Mycobacterium tuberculosis in Ethiopia Contradicts the Virgin Soil Hypothesis for Human Tuberculosis in Sub-Saharan Africa

Colonial medical reports claimed that tuberculosis (TB) was largely unknown in Africa prior to European contact, providing a "virgin soil" for spread of TB in highly susceptible populations previously unexposed to the disease [1, 2]. This is in direct contrast to recent phylogenetic models which support an African origin for TB [3-6]. To address this apparent contradiction, we performed a broad genomic sampling of Mycobacterium tuberculosis in Ethiopia. All members of the M. tuberculosis complex (MTBC) arose from clonal expansion of a single common ancestor [7] with a proposed origin in East Africa [3, 4, 8]. Consistent with this proposal, MTBC lineage 7 is almost exclusively found in that region [9-11]. Although a detailed medical history of Ethiopia supports the view that TB was rare until the 20(th) century [12], over the last century Ethiopia has become a high-burden TB country [13]. Our results provide further support for an African origin for TB, with some genotypes already present on the continent well before European contact. Phylogenetic analyses reveal a pattern of serial introductions of multiple genotypes into Ethiopia in association with human migration and trade. In place of a "virgin soil" fostering the spread of TB in a previously naive population, we propose that increased TB mortality in Africa was driven by the introduction of European strains of M. tuberculosis alongside expansion of selected indigenous strains having biological characteristics that carry a fitness benefit in the urbanized settings of post-colonial Africa