Mekelle University Institutional Repository (MUIR)

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The Mekelle University Institutional Repository (MUIR) is the official digital platform for collecting, preserving, and disseminating the intellectual output of the university community.

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Now showing 1 - 5 of 23

Arts Academy
Book of Abstracts
A central archive for Mekelle University’s institutional abstract books from academic and research conferences.
College of Business and Economics
College of Dryland Agriculture and Natural Resources Management
College of Health Sciences

Recent Submissions

Green Extraction of Copper for Replacement of Toxic Solvents from Deposit the case of Kola-Temben,Tigray ,Ethiopia
(Mekelle University, 2026-04-27) Fisaha Balahi Gebremedhin
Oxidative leaching presents a cost-effective alternative to cyanide extraction for recovering copper from low-grade copper oxide ores. The bio-oxidation of finely ground copper-containing oxide from the Kola-Temben deposit using Acidithiobacillus ferrooxidans was investigated through shake flask experiments, focusing on cell density, pH levels, and the extraction efficiency of iron and copper. Characterization techniques including XRD, EDXRF, SEM, and FAAS were employed to analyze the samples. XRD analysis revealed the presence of minerals such as malachite (Cu2CO3(OH)2), quartz (SiO2), Ca-rich albite (CaAl2Si2O8), and disordered albite (NaAlSi3O8), while SEM imaging provided magnified views of the malachite ore's morphology. EDXRF results indicated that the malachite ores primarily consisted of CuO (58.21 wt. %), SiO2 (19.21 wt %), and Fe2O3 (5.32 wt %). The pH in the control remained stable, whereas the bioleached samples exhibited a gradual decrease in pH over time. The A. ferrooxidans strain demonstrated consistent growth throughout the bioleaching process, with cell density peaking at 90.00 × 107 cells/mL at 11 weeks before slightly declining to 87.00 × 107 cells/mL from week 12, potentially due to the presence of polymetallic elements affecting the strain's metal tolerance. The presence of bacteria significantly enhanced the solubilization of both total iron and total copper compared to leaching without bacteria. Maximum extraction rates of 92.16% (14.23 mg/L) for total iron and 99.97% (4.355 ppm) for total copper were achieved after 11 weeks with bacterial leaching. In contrast, leaching without bacteria showed different extraction patterns for total iron and copper at 11 weeks. A decreasing trend in the extraction of total iron and copper oxide was observed in the later stages of bioleaching, possibly due to the formation of secondary minerals.
Welegebrial, Tekleweyni Geday
GAF 2025 Infrastructure 03
(DataCite, 2025) DataCite
The project aims to enhance Ethiopia’s academic and research workflows by promoting Open Access policies and integrating DataCite infrastructure across institutions. Focusing on Mekelle University as a pilot site, the initiative seeks to register DOIs for 100% of its publications by the end of the year, with plans to extend DOI integration to four other institutions. The project will significantly increase the visibility, citation, and accessibility of Ethiopian research, strengthening the country’s Open Access infrastructure and aligning outputs with the FAIR Principles.
An Exploration of Ethnomathematics: Measurement and Geometry in Practices, and Educational Implications in Tigray, Ethiopia
(Mekelle University, 2026-04-14) Tsegay Tesfay Beyene
Ethiopia is home to many historical and cultural sites. Tigray, located in Northern Ethiopia,is rich for such sites. As a region identified for its long years of history of civilization, it is endowed with many historical places, traditional customs, churches and monasteries that contribute a lot to way of life of the society. Despite its embodiments of diverse artifacts, the use and alignments of these to educational undertakings is obliterated. Ethnomathematics as a discipline, though reported to have been in place since 1970s, it was after D’Ambrosio’s work in 1985 that it started to flourish. In the last few years there have been few research papers published in this area. Ethiopia, as one of the most ethnically, culturally and linguistically diversified countries in the world, it has great potential for the development of ethnomathematics studies. Every culture, traditions and practices in the world use and develop mathematical ideas, ways, and techniques in dealing with the realities of life. Since cultural diversity is suitable ground for studying ethnographic research, this study explores the mathematical contents embedded in one of the cultures and traditional practices in Ethiopia, particularly in Tigray region. It focuses on traditional ways of measuring (length, width, height, weight, area, volume and surface area), exploring the mathematical knowledge embedded in some cultural heritages, cultural dresses, embroideries, and ways of expressing different mathematical contents embedded in construction sites and their educational implications. This research ultimately contributes to the investigation of mathematical concepts in connection with geometric representations and mathematical interpretations. This study applied an ethnographic research approach, which involves an exploratory qualitative study. This approach was selected because it uncovers and obtains comprehensive, broad, and in-depth information about practices which involve mathematical content, which are practiced or had been practiced among people in the study area for so many years. For this study, both primary and secondary data were used. Personal observation, structured and unstructured interviews, and questionnaires were the main methods used to gather data. Ethnographic notes during field observations and documentation (photos, audio recordings and videos) were used. This research area involves exploring and situating in a real-life context enriched with different measuring instruments, cultural dressings, designs, artifacts, cultural materials, exploring mathematical principles used by construction workers and implications for teaching in class rooms. This research relies on pragmatic research paradigm. The findings reveal various forms of ethnomathematics manifesting within traditional dressmaking, illustrating the significance of geometry and transformation in these dresses. Those various forms of ethnomathematics found embedded in the decorations of traditional dresses are like geometric figures and geometric transformations (translations, reflections and rotations with different angles). Another result obtained is people measuring grains, land, area of specific regions, time, capacity, weight and constructing, designing of traditional houses through their own indigenous knowledge. In addition to these, construction workers employ sophisticated methods to calculate areas, such space under a staircase as a triangular region linked to arithmetic sequences. They efficiently use their own formula for finding areas, volumes, and estimates using intuitive techniques. Although many of them might not have had any chance of formal education, the workers demonstrate advanced practical mathematical knowledge, showcasing innovative mathematization strategies to address real-world challenges. The integration of mathematical thinking in building and its wider implications for ethnomathematics and education are highlighted in this dissertation. The results highlight the significance of identifying and maintaining these customs and advance our understanding of the relationship between cultural practices and mathematical knowledge. This study uncovered sophisticated mathematical knowledge embedded within Tigrayan culture: novel sequences in utensils, indigenous formulae for construction measurements, and geometric patterns in dress decorations. Conversion factors were established to bridge local and modern measurements. Teachers confirmed that students learn mathematics easier and clearer when ethnomathematical tools are used. Key recommendations include documenting and preserving indigenous practices, expanding related research, and integrating this knowledge into curricula with trained teachers. Schools should also engage local artisans and elders to demonstrate techniques, offering authentic learning experiences that validate community knowledge.
በ9ኛ እና 10ኛ ክፍል የትግርኛ መማርያ መጽሐፎች የክሂሎች ዓምዳዊ አደረጃጀት ግምገማ” (ከተሻሻለው የብሉም ታክሶኖሚ 2001 ስርጭት እይታ አንፃር)
(Mekelle University, 2025-10-25) ተስፋይ ካሕሳይ
ይህ ጥናት በ2008 ዓ.ም. በኢፌዴሪ ትምህርት ሚኒስቴር የታተሙና በተለያዩ የኢትዮጵያ ክልሎች በመደበኛ ትምህርት ቤቶች እና በርቀት ትምህርትቤቶች ስራ ላይ የዋሉ የ9ኛ እና 10ኛ ክፍል የትግርኛ የተማሪ መማሪያ መፃሕፍት ውስጥ ያሉ የቋንቋ ክህሎት ተግባራት ዓምዳዊ አደረጃጀት (vertical alignment) ከተሻሻለው የብሉም ታክሶኖሚ (Revised Bloom’s Taxonomy – RBT, Anderson & Krathwohl,2001) እይታ አንፃር መገምገም ዋና ዓላማ አድርጎ ወስዷል። የጥናቱ ስልት ተጋናኝ ትይዩ ቅይጥ ዘዴ (convergent parallel mixed-methods design) ተጠቅሟል። በመር የይዘት ትንተና (directed content analysis) በጠቅላላ 779 ተግባራት (9ኛክፍል 407፣ 10ኛ ክፍል 372) በ Anderson & Krathwohl (2001) መሰረት ተመድበው ተተንትነዋል፤ በተጨማሪም በዓላማ ተኮር ናሙና ዘዴ የተመረጡ ከመፃሕፍቱ ዋና አዘጋጅ (1) እና ከ30 ዓመት በላይ ልምድ ካላቸው የሁለተኛ ድግሪ ትግርኛ ቋንቋ መምህራን (3) ጋር ከፊል-የተዋቀረ ቃለ መጠይቅ ተካሂዷል። ውጤቶቹ እንደሚያሳዩት በሁለቱም ክፍሎች ከጠቅላላ ተግባራት ዝቅተኛ የማሰብ ክህሎት (LOTS) 90.37% (~90) ሲሆን፤ ከፍተኛ የማሰብ ክህሎት ደግሞ (HOTS) 9.63% (~10) ይህም ማለት በ9ኛ ክፍል 11.06% እና በ10ኛ ክፍል 8.06% ማለት ነው። ስለሆነም ከ9ኛ ወደ 10ኛ ክፍል HOTS በ3% (regression in cognitive progression) ቀንሷል። እንዲሁም በማንበብ እና በማዳመጥ ክሂሎች ውስጥ በ10ኛ ክፍል HOTS በቅደም ተከተል ከ3% እና 5% ወደ 0% ወርዷል። ይህ የሆነበት ዋና ምክንያት ክሂሎቹ በዚህ የክፍል ደረጃ በተከታታይነት ባለመቅረባቸው መሆኑ አጥኚው አረጋግጧል። በምዕራፎች ውስጥ እና በክፍሎቹ መካከል ተከታታይነት እና ተለጣጣቂነት በከፍተኛ ደረጃ አልተመጣጠነም። የቃለ መጠይቅ ውጤቶችም ይህን አረጋግጠዋል፤ መፃሕፍቱ ተገቢና ግልጽ የሆነ ሞዴል አለመጠቀማቸው፣ የአንድን መጽሐፍ ምዕራፎች በግለሰብ ደረጃ ተከፋፍለው መዘጋጀታቸው ተከታታይነትና ተለጣጣቂነት እንዳይኖራቸው አድርገዋል። ጥናቱ መፃሕፍት በቡድን እና በRBT መሰረት እንዲዘጋጁ፣ የመፃሕፍት አዘጋጆችና መምህራን ቀጣይነት ያለው ስልጠና እንዲያገኙ፣ ከፍተኛ የማሰብ ክህሎት የሚያዳብሩ ተግባራት እንዲጨመሩ ይመከራል።