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  Subjects -> SCIENCES: COMPREHENSIVE WORKS (Total: 374 journals)
Showing 201 - 265 of 265 Journals sorted by number of followers
Revista Científica de la Universidad Nacional del Este     Open Access   (Followers: 12)
History of Science and Technology     Open Access   (Followers: 5)
Orbis Cógnita : Revista Científica     Open Access   (Followers: 4)
Research Policy : X     Open Access   (Followers: 4)
Data     Open Access   (Followers: 4)
Advanced Theory and Simulations     Hybrid Journal   (Followers: 4)
Frontiers in Climate     Open Access   (Followers: 4)
MUST : Journal of Mathematics Education, Science and Technology     Open Access   (Followers: 4)
Journal of the Indian Institute of Science     Hybrid Journal   (Followers: 4)
Discover Sustainability     Open Access   (Followers: 3)
Journal of Composites Science     Open Access   (Followers: 3)
Research     Open Access   (Followers: 3)
Journal of Big History     Open Access   (Followers: 3)
Patterns     Open Access   (Followers: 3)
People and Nature     Open Access   (Followers: 3)
Science & Technology Studies     Open Access   (Followers: 3)
Citizen Science : Theory and Practice     Open Access   (Followers: 2)
Indonesian Journal of Science and Mathematics Education     Open Access   (Followers: 2)
International Journal of Culture and Modernity     Open Access   (Followers: 2)
Experimental Results     Open Access   (Followers: 1)
Global Journal of Science Frontier Research     Open Access   (Followers: 1)
International Journal of Innovative Research and Scientific Studies     Open Access   (Followers: 1)
Acta Scientifica Malaysia     Open Access   (Followers: 1)
Applied Mathematics and Nonlinear Sciences     Open Access   (Followers: 1)
Bilge International Journal of Science and Technology Research     Open Access   (Followers: 1)
Journal of Science and Engineering     Open Access   (Followers: 1)
Uluslararası Bilimsel Araştırmalar Dergisi (IBAD)     Open Access   (Followers: 1)
Journal of Science and Technology     Open Access   (Followers: 1)
AAS Open Research     Open Access   (Followers: 1)
ARPHA Conference Abstracts     Open Access   (Followers: 1)
Revista Vivências em Ensino de Ciências     Open Access   (Followers: 1)
iScience     Open Access   (Followers: 1)
Scientonomy : Journal for the Science of Science     Open Access   (Followers: 1)
Futures & Foresight Science     Hybrid Journal   (Followers: 1)
International Journal of Research in Science     Open Access   (Followers: 1)
Jaunujų mokslininkų darbai     Open Access   (Followers: 1)
Impact     Open Access   (Followers: 1)
Revista Saber Digital     Open Access   (Followers: 1)
Fundamental Research     Open Access  
BJHS Themes     Open Access  
South American Sciences     Open Access  
Middle European Scientific Bulletin     Open Access  
Journal of Alasmarya University     Open Access  
Research Integrity and Peer Review     Open Access  
Natural Sciences Education     Hybrid Journal  
Proceedings of the Indian National Science Academy     Full-text available via subscription  
Indian Journal of History of Science     Hybrid Journal  
RAC: Revista Angolana de Ciências     Open Access  
The Innovation     Open Access  
Journal of Responsible Technology     Open Access  
Natural Sciences     Open Access  
Revista de la Sociedad Científica del Paraguay     Open Access  
Rekayasa     Open Access  
Rihan Journal for Scientific Publishing     Open Access  
Türk Bilim ve Mühendislik Dergisi     Open Access  
ArtefaCToS : Revista de estudios sobre la ciencia y la tecnología     Open Access  
Ethiopian Journal of Sciences and Sustainable Development     Open Access  
Vilnius University Proceedings     Open Access  
Sciential     Open Access  
ARPHA Proceedings     Open Access  
Gaudium Sciendi     Open Access  
Crea Ciencia Revista Científica     Open Access  
Rafidain Journal of Science     Open Access  
Journal of Al-Qadisiyah for Pure Science     Open Access  
Revista Tecnológica     Open Access  
Himalayan Journal of Science and Technology     Open Access  
International Journal of Academic Research in Business, Arts & Science     Open Access  
Universidad, Ciencia y Tecnología     Open Access  
Fides et Ratio : Revista de Difusión Cultural y Científica     Open Access  
Acta Nova     Open Access  
Revista de la Academia Colombiana de Ciencias Exactas, Físicas y Naturales     Open Access  
Entre Ciencia e Ingeniería     Open Access  
Revista Politécnica     Open Access  
Reportes Científicos de la FaCEN     Open Access  
Jurnal Ilmiah Ilmu Terapan Universitas Jambi : JIITUJ     Open Access  
Revista Eletrônica Ludus Scientiae     Open Access  
Emergent Scientist     Open Access  
Journal of Scientific Research and Reports     Open Access  
Asian Journal of Advanced Research and Reports     Open Access  
Archives of Current Research International     Open Access  
Advances in Research     Open Access  
International Journal of Applied Science     Open Access  
Iranian Journal of Science and Technology, Transactions A : Science     Hybrid Journal  
J : Multidisciplinary Scientific Journal     Open Access  
Revista Binacional Brasil - Argentina: Diálogo entre as ciências     Open Access  
Revista Ciencia y Tecnología     Open Access  
Journal of Institute of Science and Technology     Open Access  
Journal of Science (JSc)     Open Access  
WikiJournal of Science     Open Access  
Acta Materialia Transilvanica     Open Access  
Integrated Research Advances     Open Access  
PENDIPA : Journal of Science Education     Open Access  
Open Conference Proceedings Journal     Open Access  
Naturen     Full-text available via subscription  
Ekaia : EHUko Zientzia eta Teknologia aldizkaria     Open Access  
Sci     Open Access  
Maskana     Open Access  
Hoosier Science Teacher     Open Access  
Reports in Advances of Physical Sciences     Open Access  
Facets     Open Access  
Adıyaman University Journal of Science     Open Access  
Revista Brasileira de Iniciação Científica     Open Access  
Communications Faculty of Sciences University of Ankara Series A2-A3 Physical Sciences and Engineering     Open Access  
Scientific African     Open Access  
Scientific Journal of Mehmet Akif Ersoy University     Open Access  
Black Sea Journal of Engineering and Science     Open Access  
Fırat University Turkish Journal of Science & Technology     Open Access  
Gazi University Journal of Science     Open Access  
Middle East Journal of Science     Open Access  
International Journal of Computational and Experimental Science and Engineering (IJCESEN)     Open Access  
International Journal of Engineering, Technology and Natural Sciences     Open Access  
Bulletin of the National Research Centre     Open Access  
Uni-pluriversidad     Open Access  
ConCiencia     Open Access  
Ciencia y Tecnología     Open Access  
Revista Bases de la Ciencia     Open Access  
Elkawnie : Journal of Islamic Science and Technology     Open Access  
Ciência ET Praxis     Open Access  
Arab Journal of Basic and Applied Sciences     Open Access  
International Annals of Science     Open Access  
Science Heritage Journal     Open Access  
Avrasya Terim Dergisi     Open Access  
International Scientific and Vocational Studies Journal     Open Access  
TÜBAV Bilim Dergisi     Open Access  
LOGIKA Jurnal Ilmiah Lemlit Unswagati Cirebon     Open Access  
Dalat University Journal of Science     Open Access  
Investiga : TEC     Open Access  
Investigación Joven     Open Access  
Respuestas     Open Access  
Science Diliman     Open Access  
Instruments     Open Access  
Revista Científica y Tecnológica UPSE     Open Access  
HardwareX     Open Access  
Sultan Qaboos University Journal for Science     Open Access  
Borneo Journal of Resource Science and Technology     Open Access  
Sainstek : Jurnal Sains dan Teknologi     Open Access  
Revista de Información Científica     Open Access  
Indonesian Journal of Fundamental Sciences     Open Access  
Sainteknol : Jurnal Sains dan Teknologi     Open Access  
Jurnal Natural     Open Access  
Frontiers for Young Minds     Open Access  
Revista Ciência, Tecnologia & Ambiente     Open Access  
Journal of Indian Council of Philosophical Research     Hybrid Journal  
Journal of Negative and No Positive Results     Open Access  
Revista Conhecimento Online     Open Access  
Nova     Open Access  
CienciaUAT     Open Access  
Enseñanza de las Ciencias : Revista de Investigación y Experiencias Didácticas     Open Access  
Makara Journal of Science     Open Access  
Jurnal Sains Dasar     Open Access  
Indonesian Journal of Science and Technology     Open Access  
Ethiopian Journal of Science and Technology     Open Access  
Jurnal Matematika, Sains, Dan Teknologi     Open Access  
Heidelberger Jahrbücher Online     Open Access  
ARO. The Scientific Journal of Koya University     Open Access  
International Journal of Recent Contributions from Engineering, Science & IT     Open Access  
Estação Científica (UNIFAP)     Open Access  
The Winnower     Open Access  

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Ethiopian Journal of Education and Sciences
Number of Followers: 5  

  This is an Open Access Journal Open Access journal
ISSN (Print) 1998-8907
Published by African Journals Online Homepage  [261 journals]
  • The First Ground-Based Measurement of Atmospheric Carbonyl Sulphide over
           Addis Ababa (Ethiopia)

    • Authors: Milkessa G. Homa, Gizaw M. Tsidu, Tamirat A. Desta
      Pages: 1 - 18
      Abstract: Measurement of Carbonyl sulphide is very crucial to estimate the sulfur budget and is used as a tracer for the carbon cycle. Its simultaneous consumption with CO2 during photosynthesis by plant uptake makes it an ideal candidate for the partitioning of photosynthesis from respiration. This research provides the first ground-based abundance of OCS from a high-resolution Fourier Transform Infrared spectrometer over Addis Ababa (9o1’N, 38o76’E, an altitude of 2443 m.a.s.l.). We used PROFFIT95 to retrieve the vertical profile, average tropospheric and stratospheric mixing ratios, and column amount from the solar absorption spectra of OCS. Analysis of random and systematic error to retrieval shows that the total error contribution due to atmospheric and auxiliary parameters is less than 10%. The tropospheric and stratospheric average VMR in our site is 0.488 ppbv and 0.230 ppbv, respectively, with deviation from the global mean by 2.4% for tropospheric mixing ratio. The hourly variation of OCS particularly on 14, March 2010 shows slight accession from mid-morning to noon and reduction in the afternoon with a change in VMR of 0.019 ppbv. The tropospheric volume mixing ratio (in the unit of parts per billion by volume) and total column amount time series result from May 2009 to April 2010 show seasonal variation with maximum (0.60) in May and June, and minimum (0.37) in December and January. The total column amount reaches up to 8.5X1019 molecules/m2. The correlation between stratospheric tropopause level and the accession of stratospheric OCS level during hot season worth detail investigation to understand the variation of OCS besides taking long term measurement for trend analysis.
      PubDate: 2020-11-11
      Issue No: Vol. 15, No. 2 (2020)
       
  • Education for Borena Pastoralist Community Children in Ethiopia: Practices
           and Challenges

    • Authors: Ambissa Kenea Boru
      Pages: 19 - 32
      Abstract: The study attempted to examine the practices and challenges of education for Borena pastoralist communities' children. The theoretical conception of the study is rooted in 'education as a right for the children' and the 'indigenous epistemology' perspectives. The concurrent nested strategy of mixed research design with data collected from multiple sources using multiple tools has been used. Results of the study indicated that the pastoralist community members see schooling in terms of the livestock possession and herding: where schooling children means losing livestock and losing the livestock means losing the very self of the community. The community adopted various adult-centric solutions such as rotational enrollment and turn-based attendance which are not commensurate with the children’s right concerns. The opportunity cost of schooling tended to define it all. Children's right to education is not even part of the discourse. The finding implicates that there is a need to diversify the education delivery approach and pay attention to the relevance of the system to the pastoralist community. Education development should be conceptualized within the broader pastoralist area development agenda. And children's right to education need to be popularized among the pastoralist community.
      PubDate: 2020-11-11
      Issue No: Vol. 15, No. 2 (2020)
       
  • Block Procedure for Solving Stiff First Order Initial Value Problems Using
           Chebyshev Polynomials

    • Authors: Seid Yimer, Alemayehu Shiferaw, Solomon Gebregiorgis
      Pages: 33 - 44
      Abstract: In this paper, discrete implicit linear multistep methods in block form for the solution of initial value
      problems was presented using the Chebyshev polynomials. The method is based on collocation of the
      differential equation and interpolation of the approximate solution of power series at the grid points.
      The procedure yields four consistent implicit linear multistep schemes which are combined as
      simultaneous numerical integrators to form block method. The basic properties of the method such as
      order, error constant, zero stability, consistency and accuracy are investigated. The accuracy of the
      method was tested with two stiff first order initial value problems. The results were compared with a
      method reported in the literature. All numerical examples were solved with the aid of MATLAB
      software after the schemes are developed using MAPLE software and the results showed that our
      proposed method produces better results.
      PubDate: 2020-11-11
      Issue No: Vol. 15, No. 2 (2020)
       
  • Variations in Tasting Phenylthiocarbamide (PTC) in Selected Individuals
           from Ethiopia: Implications for Human Health

    • Authors: Solomon Balemi, Endashaw Bekele
      Pages: 45 - 55
      Abstract: The present study aimed to examine the PTC tasting ability in selected individuals from Ethiopia. It involved 465 participants representing four ethnic groups. A total of 69 individuals from Amhara (30 females and 39 males), 52 from Agnuak (3 females and 49 males), 59 from Nuer and 285 (60 females and 225 males) from Oromo were recruited. The investigation was made using a series of graded concentrations of PTC dissolved in pure water and the results were recorded. The participants were analyzed for the distribution of tasters and non-tasters for PTC. The frequency of dominant and recessive alleles of PTC gene was calculated using Hardy-Weinberg methods. The result showed that the frequency of tasters (82.80%) were significantly higher than that of non-tasters (17.20%) in all populations. Likewise, frequency of tasters among males (83.06%) and females (82.61%) were significantly higher than the frequency of non-taster males (16.94%) and females (17.39%). This shows that PTC tasting ability varies as a function of sexes. In all populations, the frequency of T allele (0.59) is higher than the frequency of t allele (0.41). Recognition threshold for PTC in 465 participants of both sexes were determined (at 8 and 9 solutions) and indicated that the taste ability distribution is bimodal. Based on the present data on diet, an association between the ability to taste PTC and food preferences have been observed among the studied populations. With this regard, further comprehensive study on various populations is needed, which could have significant public health importance.
      PubDate: 2020-11-11
      Issue No: Vol. 15, No. 2 (2020)
       
  • Tetracyclic Triterpenes from the Stem Bark of Vernonia biafrae and
           Evaluation of its Antimicrobial Activity

    • Authors: Teshale Zemene, Melaku Meshesha, Dereje Denu, Negera Abdissa
      Pages: 56 - 64
      Abstract: In the search for bioactive metabolites from Ethiopian medicinal plants, two tetracyclic triterpenes; spinasterol (1) and shionone (2) along with cetyl alcohol (3) were isolated from the acetone extract of the stem bark of Vernonia biafrae, a medicinal plants widely used for the treatment of infectious diseases. Column chromatographic separations and Sephadex LH-20 gel filtration were employed for the isolation of the pure compounds. The compounds were characterized by spectrometric (NMR and mass) analyses and comparison with literature data. This is the first report of compound 2 and 3 from the genus Vernonia. The extracts and the isolated compounds were evaluated for their antimicrobial activities against both bacterial and fungal test strains and exhibited comparable activities with the standard antibiotics. The highest activity was observed for acetone extract (23.73 0.10 mm) and compound 2 (23.72 0.30 mm) against Staphylococcus aureus. Whereas, the rest showed moderate to low inhibitory activities against the test strains. The finding could be used for comprehensive evaluations of the phytochemicals for their microbial activities and also support the claim that the plant V. biafrae is used for the treatment of microbial diseases.
      PubDate: 2020-11-11
      Issue No: Vol. 15, No. 2 (2020)
       
  • Typology and Structure of Basic-level Activities in Afaan Oromoo

    • Authors: Eba Teresa Garoma, Baye Yimam
      Pages: 65 - 89
      Abstract: In this study, we examined the typology and structure of basic-level activity, which is one of the five eventuality types (the others being stative, achievement, semelfactive and accomplishment) in Afaan Oromoo. Accordingly, we use the three temporal features (dynamicity, durativity and atelicity) and verb constellations of clauses to identify and describe each subclass of the situation aspect. These are claimed to denote the state-of-affair based on perceptual and cognitive abilities. Purposive sampling technique was used to collect data from written web corpora of different genres. These corpora were developed by The HaBit Project and Ethiopian Language Technology Group in 2016. Afaan Oromoo textbooks of grades 9-12 were also used as data sources. On the assumption that activities are dynamic, durative and atelic which imply no inherent final points, we have identified five subcategories: motion, emission, consumption, creation and active perception. The verbs in these subtypes of activities co-occur with agentive, non-agentive and self-agentive arguments to show various semantic readings. Regarding logical structure, we have proposed [DO’ (x, [Pred’ (x) or (x, y)])] as the general logical structure of the situation. In the structure, the prime DO’ represents the logical operator, Pred’ is to any activity verb, ‘x’ is agent, effector or experiencer, and ‘y’ is a theme, patient or stimulus. However, ‘x’ is the theme for one-place predicates. From the findings, we suggest that the computational aspect of logical and argument structures should be formulated to advance Afaan Oromoo a step towards natural language processing technology.
      PubDate: 2020-11-11
      Issue No: Vol. 15, No. 2 (2020)
       
  • Determination of Selected Pesticide Residues in Diga Water Reservoir,
           Eastern Wollega Zone, Ethiopia

    • Authors: Senbeto Debelo, Teshome Tolcha, Tesfa Bedassa
      Pages: 90 - 98
      Abstract: This study aimed to assess the status of diazinon, chlorothalonil, Malathion and chloropyrifos in Diga water reservoir, located in Diga district, Eastern Wollega Zone, Ethiopia. It serves as Nekemte City municipal tap water reservoir. Salting-out assisted liquid-liquid extraction (SAALE) was used for extraction and/or preconcentration of the target analytes before their determination by gas chromatography mass spectrometry (GC-MS). The method showed acceptable linearity (R2) in the range of 0.996 to 0.999. The limit of detection (LOD) of the method ranged from 1.38 to 4.92 μg L−1and limit of quantification (LOQ) ranged from 4.60 to 16.40 μg L−1. The relative recovery ranged from 80.34 % to 100.32%. Analysis of the collected real samples indicates that the water samples were not polluted with residues of diazinon, chlorothalonil, Malathion and chlorpyrifos or contain below the LOD of the method.
      PubDate: 2020-11-11
      Issue No: Vol. 15, No. 2 (2020)
       
 
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