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Global Development of Mobile Value Added Services
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作者 Li Shan (China Academy of Telecommunications Research of Mll, Beijing 100083, China) 《ZTE Communications》 2005年第4期2-5,共4页
With the increasing demand for VAS from the subscribers, mobile operators are making efforts to create more services to promote the continuous development of the non-voice service application. The following three mobi... With the increasing demand for VAS from the subscribers, mobile operators are making efforts to create more services to promote the continuous development of the non-voice service application. The following three mobile VASes are becoming the development focus of operators. 展开更多
关键词 In Global development of Mobile value Added Services VAS UMTS SMS
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Sustainability Assessment of Banana (Musa spp.) Yield Gap Reduction through Value Chain Development Interventions in Smallholder Farming Systems in Manicaland, Zimbabwe
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作者 Mthintwa Tawanda Hove Hlamalani Ngwenya Johan Van Niekerk 《Agricultural Sciences》 2024年第8期962-992,共31页
This study evaluated the effectiveness of donor supported agricultural value chain development projects in sustainably narrowing yield gaps for banana smallholder farmer producers in Manicaland, Zimbabwe. The study us... This study evaluated the effectiveness of donor supported agricultural value chain development projects in sustainably narrowing yield gaps for banana smallholder farmer producers in Manicaland, Zimbabwe. The study used a mixed methods research design that relied on farmers records for the quantitative analysis and focus group discussion and in-depth interviews for key experts for the qualitative aspects. A mix of regression analysis, t-tests, Pearsons’s correlation and analysis of variance statistical methods were used for the quantitative analysis while thematic response analysis was used for the qualitative engagements. The findings showed that by the end of the activity, the project had successfully narrowed the banana yield gaps to 18.66 tons per hectare working with a potential yield base of 40 tons. However, 5 years after the project closure the yield gap had fallen to 24.7 tons indicating a lack of sustainability of yield gap reduction. However, the yield gap slump does not override the fact that farmers on average were still able to sell approximately 5 tons per every 6 months after 5 years from the project closure which is beyond any poverty threshold. This suggests genuine upward economic mobility. Additionally, in analyzing what factors had the greatest influence on yield gap reduction, the access to fertilizer ranked highest where genetics, irrigation and improved agronomy followed in that respective order. The study further showed that farmers who receive value chain development support whilst at an already commercialized state tend to maintain productivity thresholds higher in comparison to those who are at a pre commercial state. This is evidenced by the fact that the pre commercial farmers had a yield reduction of 30.83 percent after 5 years of the project closure whereas the former realized a productivity growth of 7.84%. In conclusion, whilst the intervention was successful in transitioning farmers out of poverty, more investment should be made towards transitioning smallholder farmers to integrated soil fertility management practices and improvement of agronomic efficiency through stronger on field collaboration between research institutions, the government and development institutions. 展开更多
关键词 Yield Gap value Chain development Soil Health Varietal Replacement Rate Sustainability and Economic Mobility
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A critical analysis of environmental evolutionin the loess-plateau area
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作者 Lu Zhongchen(Research Center for Eco - Environmental Sciences. Chinese Academy of Sciences , Beijing 100085, China)Yuan Baoyin(Institute of Geology, Chinese Academy of Bciences . Beijing 100029 . China) 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 1995年第3期283-288,共6页
Acriticalanalysisofenvironmentalevolutionintheloess-plateauareaLuZhongchen(ResearchCenterforEco-Environmenta... Acriticalanalysisofenvironmentalevolutionintheloess-plateauareaLuZhongchen(ResearchCenterforEco-EnvironmentalSciences.Chinese... 展开更多
关键词 critical analysis geomorphologic developing stage: erosion integrated value.
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The Contemporary Development of Mankind and Value Choices in the 21st Century
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《Social Sciences in China》 1999年第3期79-81,190,共4页
关键词 The Contemporary development of Mankind and value Choices in the 21st Century
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