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      • KCI등재

        Genotype × environment interactions of yield of cowpea (Vigna unguiculata (L.) Walp) inbred lines in the Guinea and Sudan Savanna

        Emmanuel Yaw Owusu,Isaac Kodzo Amegbor,Haruna Mohammed,Francis Kusi,Ibrahim Atopkle,Emmanuel Kofi Sie,Memunatu Ishahku,Muktaru Zakaria,Sumani Iddrisu,Haruna Ali Kendey,Ousmane Boukar,Christian Fatokun 한국작물학회 2020 Journal of crop science and biotechnology Vol.23 No.5

        The variable cowpea productivity across diff erent environments demands evaluating the performance of genotypes in a breeding program prior to their release. The aim of this study was to assess yield stability of eight cowpea advanced breeding lines selected from participatory varietal selection in multilocational trials, and to identify mega-environments for cowpea production in Ghana. The genotypes were evaluated across fi ve environments in 2016 and 2017 in randomized complete block design with three replications. The GEA-R version 4.0 software was used for genotype main eff ect plus genotype by environment interaction (GGE) biplot analyses. Analysis of variance (PROC GLM of SAS using a RANDOM statement with the TEST option) detected signifi cant variations for location, year, genotype, environment, and their interactions. The results showed that the yield performances of the cowpea genotypes were highly infl uenced by genotype × environment interaction eff ects. The principal component 1 (PC1) and PC2 were signifi cant components which accounted for 46.75% and 22.84% of GGE sum of squares, respectively. We showed for the fi rst time, two mega-environments for cowpea production and testing in the major cowpea production agro-ecologies in Ghana. The genotypes SARI-6-2-6 and IT07K-303-1 were adapted to Damongo, Nyankpala, and Tumu, whereas SARI-2-50-80 was adapted to Yendi and Manga. The best ranking location was Damongo followed by Tumu, and Nyankpala. The high-yielding genotypes, IT86D-610, IT10K-837-1, IT07K-303-1, and SARI-2-50-80 had signifi cant higher grain yields than the check (Bawutawuta) and were recommended for release as cultivars (or as breeding lines) to boost cowpea production in Ghana.

      • KCI등재

        Effect of Emotional Intelligence Training and Cognitive Restructuring Therapy on Self-Esteem of Secondary School Students Experiencing Academic Failure in Ibadan, Oyo State, Nigeria

        Stephen Oluwaseun Emmanuel,Moses Oluwafemi Ogundokun 강원대학교 인문과학연구소 2023 Journal of Humanities Therapy Vol.14 No.1

        Students experiencing academic failure often get the feeling of rejection from their parents, peers, teachers among others which ultimately impacts on their self-esteem. They evaluate themselves based on the subjective opinion from peers which may cause individuals to judge themselves worthy or unworthy based on the feedback they get from others. This study therefore examined the use of emotional intelligence training and cognitive restructuring on self-esteem of secondary school students experiencing academic failure in Ibadan, Oyo State, Nigeria. The moderating effects of gender and academic motivation were also examined. A pretest-posttest, control group, quasi-experimental design with a 3x2x3 factorial matrix was adopted. A multi-stage sampling procedure was employed. Three local government areas were randomly selected from Ibadan, Oyo State, Nigeria. One public Senior Secondary School were randomly selected from each of the local government area. 120 (M= 53, F=67) senior secondary school students 2 who were experiencing academic failure were screened for the self-esteem and were randomly assigned to Emotional Intelligence Training (40), Cognitive Restructuring Therapy (40) and Control Group (40). Treatment lasted for eight weeks training for emotional intelligence training Journal of Humanities Therapy, Humanities Institute, Kangwon National University, Korea 2023, vol.14-1, pp.75~104 https://doi.org/10.33252/jht.2023.6.14.1.75 ISSN 2765-2653(Online) 76 Stephen Oluwaseun Emmanuel ; Moses Oluwafemi Ogundokun_ Effect of Emotional ... Ⅰ. Introduction Students experiencing academic failure often get the feeling of rejection from parents, peers, and teachers, among others; this feedback may reduce their self-esteem. The impact of self-esteem on a variety of outcomes has been the subject of numerous studies in different disciplines of psychology (e.g., Orth, Robins, Widaman, and Conger, 2014; Pyszczynski, Greenberg, Solomon, Arndt, and Schimel, 2004). In the past, researchers considered having a high level of self-esteem as being wholly positive (Baumeister, Heatherton, and Tice, 1993). According to Diener and Diener (1995), having a high self-esteem was linked to a number of favourable outcomes, including life satisfaction and academic performance (Bowles, 1999). Contrarily, low self-esteem was mostly associated with negative outcomes like depression and poor academic performance (Crocker and Park 2004; DeWit, Adlaf, Offord, and Ogborne, 2000). and cognitive restructuring therapy groups. Data were analysed using Analysis of Covariance (ANCOVA) and Multiple Classification Analysis at the 0.05 level of significance. The results indicated that there was a significant main effect of treatments on self-esteem of the participants experiencing academic failure. There was no significant interaction effect of academic motivation and gender on self-esteem of students experiencing academic failures. Both Emotional Intelligence Training and Cognitive Restructuring Therapy were effective in managing self-esteem of students experiencing academic failure. It was recommended that Counselling Psychologists and Educational Psychologists should utilise these therapies to manage self-esteem of students.

      • KCI등재

        Empirical Analysis of the Effects of the Chinese Soybean Target Price Policy

        ( Emmanuel Amanor Yirenkyi ),( Jong In Lee ) 강원대학교 농업생명과학연구원(구 농업과학연구소) 2021 강원 농업생명환경연구 Vol.33 No.2

        Soybeans play an important role in Chinese agriculture; they are not only the main source of vegetable oil but also an important source of plant protein. This study examines the Chinese soybean target price subsidy, which is intended to effectively guarantee the basic income of farmers using a dataset containing information on 4 provinces that have implemented such policies as the treatment group and 23 provinces that have not as the control group from the China Rural Statistical Yearbook, an ongoing panel data from the year of 2004 to 2015. A difference-in-difference (DID) model was used to estimate the effect of the soybean target price policy on production and average production, showing that the soybean target price subsidy policy has not solved the problems of soybean production nor fundamentally addressed the issue of soybean reserves. The soybean target price subsidy policy guarantees the basic benefits of farmers, promotes production in the middle and lower levels of soybean culture, and has improved the market pricing mechanism, but there remain such problems as lower target prices, failure to promote farmers’ production, some unreasonable processes in the policiese unreasonab and inadequate subsidies. This research holds important theoretical and realistic significance by serving as a reference for other agricultural product price reforms.

      • KCI등재

        The Impact of Climate Change on the East African Community’s Economy in 2050

        Emmanuel Nigarura,Jong-Hwan Ko(고종환) 한국아프리카학회 2021 한국아프리카학회지 Vol.63 No.-

        본 논문의 목적은 연산가능일반균형(CGE)모형을 이용하여 2050년 기후변화가 동아프리카공동체 경제에 미치게 될 경제적 영향을 정량적으로 분석하는 것이다. Global Trade Analysis Project (GTAP) version 10 database, World Bank의 data 및 관련 자료를 활용하여 2014년 대비 2050년 동아프리카공동체 경제의 주요 변수를 예측하였다. 경제주체의 기후변화에 대응하는 적응전략과 상품의 생산 및 시장가격의 변화에 주목하였다. 연구목적에 맞게 2가지 시나리오를 설정하였다. 기후변화를 고려하지 않은 기본 시나리오와 기후변화를 고려한 정책 시나리오를 설정하였다. 연구결과를 보면 기후변화로 인해 동아프리카공동체 모든 회원국의 실질GDP와 농업 생산량이 감소하는 것으로 분석되었다. 그러나 농산품의 생산자가격과 민간소비는 늘어날 것으로 전망되었다. 또한 동아프리카공동체 회원국의 농산품 교역이 감소할 것으로 전망되었다. 동아프리카공동체의 정책입안자들은 기후변화가 농산품 생산에 미치게 될 부정적인 영향에 주목하여 관개시설 개선하기 위한 투자와 같은 기후변화에 대한 적응전략 마련에 우선순위를 두어야 할 것 판단된다. The aim of this paper is to quantify the economic impact of climate change on the East African Community (EAC) economy in the year 2050. We utilize the computable general equilibrium (CGE) approach. Using the Global Trade Analysis Project (GTAP) database version 10, World Bank data and so on, we forecast the global economy of the EAC in 2050 relative to 2014. The principal focus is on the role of economic agents’ adaptation response to climate change, and the possible changes in output and market prices. We implement two simulations, the baseline scenario, which does not account for climate change effects, and the policy scenario, which accounts for the impacts of climate change. The simulation results show that extreme climate change will negatively affect the real GDP and agricultural output in all of the EAC member countries. However, the producer price and the private household consumption of agricultural products will increase. Additionally, the simulation results indicate that trade in agricultural commodities is negatively affected by climate change in all EAC member countries. Our study suggests that policymakers should pay more attention to the negative impact of climate change on agricultural output by prioritizing the capacity to adapt to climate change, with a greater emphasis on irrigation systems.

      • KCI등재

        Winter Wheat Grain Yield Response to Fungicide Application is Influenced by Cultivar and Rainfall

        Emmanuel Byamukama,Shaukat Ali,Jonathan Kleinjan,Dalitso N,Yabwalo,Christopher Graham,Melanie Caffe-Treml,Nathan D,Mueller,John Rickertsen,William A,Berzonsky 한국식물병리학회 2019 Plant Pathology Journal Vol.35 No.1

        Winter wheat is susceptible to several fungal pathogens throughout the growing season and foliar fungicide application is one of the strategies used in the management of fungal diseases in winter wheat. However, for fungicides to be profitable, weather conditions conducive to fungal disease development should be present. To determine if winter wheat yield response to fungicide application at the flowering growth stage (Feekes 10.5.1) was related to the growing season precipitation, grain yield from fungicide treated plots was compared to non-treated plots for 19 to 30 hard red winter wheat cultivars planted at 8 site years from 2011 through 2015. At all locations, Prothioconazole + Tebuconazole or Tebuconazole alone was applied at flowering timing for the fungicide treated plots. Grain yield response (difference between treated and non-treated) ranged from 66-696 kg/ha across years and locations. Grain yield response had a positive and significant linear relationship with cumulative rainfall in May through June for the mid and top grain yield ranked cultivars (R2=54%, 78%, respectively) indicating that a higher amount of accumulated rainfall in this period increased chances of getting a higher yield response from fungicide application. Cultivars treated with a fungicide had slightly higher protein content (up to 0.5%) compared to non-treated. These results indicate that application of fungicides when there is sufficient moisture in May and June may increase chances of profitability from fungicide application.

      • KCI등재

        Post-vaccination COVID-19 deaths: a review of available evidence and recommendations for the global population

        Emmanuel Lamptey 대한백신학회 2021 Clinical and Experimental Vaccine Research Vol.10 No.3

        Coronavirus disease 2019 (COVID-19) vaccines undergo rigorous testing in clinical trials to meet high safety standards before rollout to the general population. While over 200 million vaccines are administered in more than 50 countries, coincidental adverse events including deaths and related fatalities are temporally associated with the vaccination campaign. Scientific evidence supports the safety of the vaccines and there are studies proving vaccination outweighs any risk or concerns except in rare cases. Reports of these post-vaccination deaths and misleading claims have fueled hesitancy among individuals that need to be addressed. In this review, we summarize epidemiological data related to COVID-19 vaccine deaths, including instances where scientific evidence exists to justify misinterpretation of surveillance data. Rare cases where vaccination-related deaths or serious side effects exist were described. Available evidence does not support making assumptions and conclusions that the vaccines are necessarily responsible for these deaths or adverse events. In addition, we share lessons from these experiences and recommendations to guide the mass population.

      • KCI등재
      • KCI등재

        Characterization of Cassava Fiber of Different Genotypes as a Potential Reinforcement Biomaterial for Possible Tissue Engineering Composite Scaffold Application

        Emmanuel Diabor,Paul Funkenbusch,Elsie Effah Kaufmann 한국섬유공학회 2019 Fibers and polymers Vol.20 No.2

        Cassava bagasse contains considerable amount of natural single elementary cellulose fibers and white thick root fiber (thick-core fiber) that has seen frequent application in the packaging industry as reinforcement for plastic composite development. However, a review of the literature was unable to find any study that characterized the material properties (such as tensile properties) of both the single elementary and white thick-core cassava cellulose fibers), and their application as potential reinforced filler in tissue engineering scaffold development. In this study, the tensile properties, morphology, crystallinity and thermal degradation profile of non-chemically treated single elementary cellulose fibers and thick-core fibers of different cassava genotypes were investigated. Fibers were tested according to ASTM C1557 under direct tension in a standard mechanical testing system and the cross-sectional area of the fractured regions of the fibers were determined usinga 3D optical microscopy method. Cassava fibers of different genotypes did not show any significant difference in tensile properties, with average tensile strength ranging from (5.1-7.3 MPa), Young’s modulus (258-333 MPa) and failure strain (3.4-4.2 %). Tensile test conducted for several gage lengths did not influence the tensile strength and Young’s modulus of the fibers, however, strain-at-break depended on gage length. Single elementary and thick-core fibers showed similar surface morphology, degree of crystallinity (ranging from 21-40 %) and tensile properties with some variation in elastic modulus. Cassava fibers are thermally stable around 100-200 oC, where processing could be performed. Preliminary results showed an improvement in the mechanical properties of a gelatin scaffold when cassava cellulose microfibers were used as reinforcing fillers. The current findings show that cassava fiber has a reasonable mechanical strength, stiffness and thermal stability, and could be considered as a reinforced biomaterial to improve the mechanical integrity of tissue engineering scaffolds.

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