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Amare WONDIRAD 한국서비스디자인학회 2023 한국서비스디자인학회 학술대회자료집 Vol.2023 No.1
Ecotourism has been widely promoted by academics and practitioners alike as a tool to achieve the dual aims of conservation and development. However,several scholars questioned whether sustainability goals can be successfully achieved through ecotourism. Of the various limiting factors of ejfective ecotourism development discussed in the literature, a lack of ejfective stakeholder collaboration is pervasive. This study investigates the contributions of stakeholder collaboration towards sustainable ecotourism development in a developing country setting by employing stakeholder and collaboration theories and triple-bottom-line principles. Through adopting a qualitative research approach with an exploratory design, the current study unfolds the existence of poor interactions and collaboration among ecotourism stakeholders, which in turn, affects the sustainable development of ecotourism. Findings challenge that in poorly resourced remote destinations, failure to meaningfully empower and participate communities does not only undermine the successful development of ecotourism but also it jeopardizes the long-term survival of the ecosystem and communities themselves.
The boronated scintillator detector of the ISS-CREAM experiment
Amare, Y.,Anderson, T.,Angelaszek, D.,Anthony, N.,Cheryian, K.,Choi, G.H.,Copley, M.,Coutu, S.,Derome, L.,Eraud, L.,Hagenau, L.,Han, J.H.,Huh, H.G.,Hwang, Y.S.,Hyun, H.J.,Im, S.,Jeon, H.B.,Jeon, J.A. Elsevier 2019 Nuclear Instruments & Methods in Physics Research. Vol.943 No.-
<P><B>Abstract</B></P> <P>The Cosmic Ray Energetics And Mass for the International Space Station (ISS-CREAM) instrument is a next-generation experiment for the direct detection and study of cosmic-ray nuclei and electrons. With a long exposure in low Earth orbit, the experiment will determine the particle fluxes and spectral details of cosmic-ray nuclei from hydrogen to iron, over an energy range of about 1 <SUP> 0 12 </SUP> eV to > 1 <SUP> 0 15 </SUP> eV, and of cosmic-ray electrons over an energy range of about 5 × 1 <SUP> 0 10 </SUP> eV to > 1 <SUP> 0 13 </SUP> eV. The instrument was deployed to the ISS in August 2017 on the SpaceX CRS-12 mission. We review the design, implementation and performance of one of the ISS-CREAM detector systems: a boron loaded scintillation detector used in discriminating electron-induced events from the much more abundant cosmic-ray nuclei.</P>
Adaptability and Stability Analysis of Groundnut Genotypes Using AMMI Model and GGE-biplot
Amare Kebede B,Adisu Getahun 한국작물학회 2017 Journal of crop science and biotechnology Vol.20 No.5
Unpredictable rainfall, variations in farm inputs, crop-diseases, and the inherent potential of genotypes are among the major factors for low and variable crop yield. Fourteen elite groundnut genotypes were examined in 14 environments to analyze adaptability and stability of genotypes, and identify mega-environments if they exist. Additive main effect and multiplicative interaction (AMMI) model, cultivar-superiority measure, and genotype plus genotype-by-environment (GGE) biplot analysis were used for data analysis. The environment (69.8%) and genotype-by-environment interaction (GEI) effects (21.4%) were dominating the genotypic effect (8.8%). The GEI was significant (P < 0.01), and two distinct environments (mega-environments) were identified, suggesting separate national groundnut breeding strategies for Babile and Pawe. ICGV-94100 and ICGV-97156 were stable and had the highest-yield at Babile and Pawe, respectively. The higher heritability value was recorded in more homogeneous and favorable environments, indicating the genetic potential of groundnut genotypes were better attained in more homogeneous and favorable environments. AMMI model, cultivar-superiority measure, and GGE biplots were helpful methodologies and complemented each other to evaluate the adaptability and stability of groundnut genotypes in diverse environments.
( Tadesse Amare ),( Gebeyehu Goshu ),( Berhan Tamir ) 한국축산학회(구 한국동물자원과학회) 2018 한국축산학회지 Vol.60 No.5
Background: Sheep production is a major component of the livestock sector in Ethiopia. The country owing to the large population of 30.70 million estimated numbers of sheep in the country and out of which about 72.14% are females, and 27.86% are males with diverse genetic resources. The real value of indigenous breeds was often under-estimated mostly due to their poor appearance and relatively low productivity. Developing countries in most cases opt for exotic breeds to increase animal productivity through crossbreeding or breed substitution without properly investigating the production potential of the indigenous breeds. The main objective of the research was to identify sheep flock composition and structure, farmers’ traits of interest and breeding objective of Wollo highland sheep, and their F<sub>1</sub> crossbreed progenies. Results: Smallholder farmers’ flock synthesized from breeding ewes, breeding rams, pre-weaned ewe lambs, pre-weaned ram lambs, unproductive ewes, castrated and fattened rams, with the percentage coverage of 29.2, 13.3, 15.5, 16.5, 12.4, and 12.5%, respectively. The maximum number of flock size was 289.0 sheep per flock and higher in the third stratum. The off-take rate percentage of the three strata presented as 21.9% in 1st stratum, 12% in the 2nd stratum, and 16.4% in the 3rd stratum and higher off-take rate recorded in the first stratum. Sheep producer’s traits of interest ranked by growth rate (first), body size (second) and marketing value was third rank. Communal breeding (random mating), village based controlled breeding, mixed type and private ram controlled breeding practice were comprised of 39.7, 61.7, 52 and 71.3%, respectively. The percentages of ewes per flock composition were presented as 36.5, 27.1 and 25.5%, respectively in the 3rd stratum, 2nd stratum and 3rd stratum in the order of their importance’s. Conclusion: Genetic improvement practices at smallholder sheep producers situation was showing promising outcome with indigenous Washera F<sub>1</sub> crossbred lambs and which designated for weaning rate, body size, marketing age, age at first lambing, good temperament and large litter size in the order of their rank. The contemporary breeding practice tendency indicated that, reduced flock size to improve flock productivity via crossbreeding practices.
Effects of Ag Additive on Device Performance of Flexible CIGSe Thin-Film Solar Cells
Awet Mana Amare(아웻 마나 아마래),Inyoung Jeong(정인영),Soomin Song(송수민),Young-Joo Eo(어영주),Ara Cho(조아라),Jun-Sik Cho(조준식),Joo Hyung Park(박주형),Seung Kyu Ahn(안승규),Jinsu Yoo(유진수),SeJin Ahn(안세진),Jihye Gwak(곽지혜),Jae 한국신재생에너지학회 2022 한국신재생에너지학회 학술대회논문집 Vol.2022 No.4
Awet Mana Amare,황인찬,정인영,박주형,안진기,송수민,어영주,조아라,조준식,안승규,유진수,안세진,곽지혜,박현우,윤재호,김기환,신동협 한국태양광발전학회 2023 Current Photovoltaic Research Vol.11 No.1
In this work, we investigated the thickness of Ag precursor layer to improve the performance of flexible CIGSe solar cells grown on stainless steel (STS) substrates through three-stage co-evaporation with Ga grading followed by alkali treatments. The small amount of incorporated Ag in CIGSe films showed enhancement in the grain size and device efficiency. With an optimal 6 nm-thick Ag layer, the best cell on the STS substrate yielded more than 16%, which is comparable to the soda-lime glass (SLG) substrate. Thus, the addition of controlled Ag combined with alkali post-deposition treatment (PDT) led to increased open-circuit voltage (VOC), accompanied by the increased built-in potential as confirmed by capacitance-voltage (C-V) measurements. It is related to a reduction of charge recombination at the depletion region. The results suggest that Ag alloying and alkali PDT are essential for producing highly efficient flexible CIGSe solar cells.
Two-shaft stationary gas turbine engine gas path diagnostics using fuzzy logic
F. D. Amare,S. I. Gilani,B. T. Aklilu,A. Mojahid 대한기계학회 2017 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.31 No.11
Our objective was to develop a Fuzzy logic (FL) based industrial two-shaft gas turbine gas path diagnostic method based on gas path measurement deviations. Unlike most of the available FL based diagnostic techniques, the proposed method focused on a quantitative analysis of both single and multiple component faults. The data required to demonstrate and verify the method was generated from a simulation program, tuned to represent a GE LM2500 engine running at an existing oil & gas plant, taking into account the two most common engine degradation causes, fouling and erosion. Gaussian noise is superimposed into the data to account measurement uncertainty. Finally, the fault isolation and quantification effectiveness of the proposed method was tested for single, double and triple component fault scenarios. The test results show that the implanted single, double and triple component fault case patterns are isolated with an average success rate of 96 %, 92 % and 89 % and quantified with an average accuracy of 83 %, 80 % and 78.5 %, respectively.