Browsing by Author "Dereje Nigussie"

Now showing 1 - 4 of 4
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    Influence of Leadership Styles on Team Performance in Ethiopian Biomedical and Public Health Institutes
    (Addis Ababa University, 2025-08) Dereje Nigussie; Tekelgorgis Assefa
    The research topic is to look at how different leadership styles affect the performance of teams within Ethiopian Biomedical and Public Health Institutes. It seeks to understand how transformational, transactional and servant leadership shapes the relationships among team members, their communication and decisions about talent. For data collection a mixed-methods approach has been used to process giving surveys to 198 people and interviewing others to access both types of data. The study shows that using transformational leadership can greatly improve how well a team performs by supporting motivation, trust and teamwork. Moreover, having the right organizational culture and effective ways to communicate influences a lot in determining team success. From these outcomes, we understand the value of training leaders to be flexible and supportive in the workplace which is important for achieving better public health outcomes
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    Interplay Of Drought, Resilience, and Food Security in the Somali Regional State of Ethiopia
    (Addis Abeba University, 2026) Dereje Nigussie; Desalegn Yayeh
    The interaction between drought resilience and food security challenges the global community and influences agriculture-based food systems. This study aimed to investigate the effects of short- and long-term drought shocks on food security and identify specific resilience indicators that mitigate these impacts among rural households in Ethiopia’s Somali Regional State. This study used mixed methods, combining qualitative data from focus group discussions and key informant interviews across three districts, along with self-reported shock data from the Ethiopian Socioeconomic Panel Survey (ESPS) waves 4 (2018/19) and 5 (2021/22), and quantitative analysis of panel household data from the ESPS’s two waves and historic observations of climate data. The study examined how rural Somali households experienced drought through both subjective (qualitative data from FGDs and KIIs, along with self-reported shock data from the ESPS waves) and objective drought measures (specifically the Standardized Precipitation Evapotranspiration Index (SPEI) for 6- and 24-month droughts). A subsample of 313 rural households' socioeconomic datasets across both waves was quantitatively analyzed using the FAO's RIMA-II framework and household fixed- ffects panel regression. RIMA identified potential observed resilience variables contributing to core resilience pillars. By modeling realized per capita daily kilocalorie consumption as a dependent variable and interaction terms between dummy drought indicators and the identified potential resilience variables in household fixed effects panel regressions, the study disclosed how much both shortand long-term droughts negatively affected the realized food security indicator and which specific resilience indicators moderated this relationship. Qualitative findings confirmed drought as a frequent and severe climate shock, undermining rural livelihoods, water access, and food security, while the drought analysis based on quantitative data confirmed an increase in the exposure and severity of both short- and long-term droughts in these communities by 2022. Short-term drought disrupts pastoral and agro-pastoral production, affecting food availability, whereas long-term drought causes chronic food insecurity through water stress. Assets, adaptive capacity, and access to basic services correlate with resilience, whereas social safety nets primarily smoothen consumption patterns. The regression results showed 5.2 % and 6.2% reductions in daily kilocalorie consumption from effects of short- and long-term droughts, respectively. Key resilience indicators for mitigating short-term droughts include income diversification, livestock holdings, cropland area, and access to protected water and health services. For long-term droughts, market access, income diversification, herd diversity, financial inclusion, and access to water and health services reduce adverse effects. The study recommends strengthening these interconnected resilience components and context-specific resilience pathways, emphasizing diversified livelihoods, market access, financial inclusion, improved water and health services access, enhanced productive assets, and reformed safety nets to sustain food security amid escalating drought effects in rural areas of the Somali Region.
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    Modeling the Impact of Traffic Factors on Queue Length at Consecutive Signalized Intersections
    (Addis Ababa University, 2025-02) Dereje Nigussie; Yonas Minalu (PhD)
    Urbanization and increased vehicular traffic have led to significant challenges in managing traffic flow at signalized intersections, particularly in developing countries. This study focuses on optimizing traffic flow at consecutive signalized intersections by analyzing the factors affecting queue dynamics. The objectives include modeling the impacts of pedestrian volume, signal green time allocation and proportion of buses presence on queue length. Using a simulation-based approach with SUMO software, the study modeled various traffic scenarios to understand the interactions between vehicles, pedestrians and signal timing. Key findings highlight that queue lengths are heavily influenced by signal timing inefficiencies, pedestrian crossing during vehicle gaps and the presence of proportion of buses, which exacerbate delays and reduce intersection capacity. A multinomial linear regression model was developed to assess the impact of pedestrian volume, proportion of buses and green time on the performance of two consecutive signalized intersections. The regression model yielded significant results, with an adjusted R square value close to one, indicating a strong correlation between pedestrian volume, proportion of buses and green time and probability of queue formation. Factors such as pedestrian volume, proportion of buses and green time were found to be statistically significant in influencing the performance. This research contributes to the field of urban traffic management by providing insights into optimizing signal timing strategies and addressing the unique challenges of mixed traffic conditions.
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    The Practice of Material Resource Management in Secondary and Preparatory Schools of Kolfe Keranyo Sub-City, Addis Ababa
    (Addis Ababa University, 2017-06) Dereje Nigussie; Dejene Nigussie
    The objective of this research was to assess the practice of material resource management in Kolfe Keranyo Secondary and Preparatory schools of Addis Ababa sub-city. It was concerned with material management functions (such as, planning, purchasing distribution, controlling, utilization, storage, inventory control and maintenance, scrap and surplus disposal) challenges faced for effective management and utilization of educational material guidelines policies. To meet the stated objective descriptive survey method of research was used in carry out. Four groups of respondents participated in the study. These were academic and administrative staff, sub city officers and PTSA members. As of study areas, 0ne sub city and 3 schools were selected purposely. Respondents were selected by purposive sampling technique due to their direct relation with the issue under study and also to gain sufficient information. Availability and simple random sampling techniques were also employed. The data were collected through questionnaire, interviews and personal observation. Data gathered through questionnaire were quantitatively analyzed using percentage and mean value using SPSS whereas the data gathered through interview open ended questions and observation were handled through thematic analysis. Integrated material management functions were not properly implemented. Lack of training and continuous supervision in the area of educational material management, Based on these findings, it was forward some recommendation. Therefore capacitating professionals’ through training assist users in putting these materials in to effective usage. To develop positive attitude towards the management and utilization of educational materials, school managements should work closely with the school community and stakeholders. Organized and integrated education materials management system should be designed by concerned bodies to utilize and manage materials properly.