HIV and AIDS has continued to be a major public health concern, and hence one of the epidemics that the world resolved to end by 2030 as highlighted in sustainable development goals (SDGs). A colossal amount of effort...HIV and AIDS has continued to be a major public health concern, and hence one of the epidemics that the world resolved to end by 2030 as highlighted in sustainable development goals (SDGs). A colossal amount of effort has been taken to reduce new HIV infections, but there are still a significant number of new infections reported. HIV prevalence is more skewed towards the key population who include female sex workers (FSW), men who have sex with men (MSM), and people who inject drugs (PWID). The study design was retrospective and focused on key population enrolled in a comprehensive HIV and AIDS programme by the Kenya Red Cross Society from July 2019 to June 2021. Individuals who were either lost to follow up, defaulted (dropped out, transferred out, or relocated) or died were classified as attrition;while those who were active and alive by the end of the study were classified as retention. The study used density analysis to determine the spatial differences of key population attrition in the 19 targeted counties, and used Kilifi county as an example to map attrition cases in smaller administrative areas (sub-county level). The study used synthetic minority oversampling technique-nominal continuous (SMOTE-NC) to balance the datasets since the cases of attrition were much less than retention. The random survival forests model was then fitted to the balanced dataset. The model correctly identified attrition cases using the predicted ensemble mortality and their survival time using the estimated Kaplan-Meier survival function. The predictive performance of the model was strong and way better than random chance with concordance indices greater than 0.75.展开更多
In the process of folk custom development, ecological transformation is a normal phenomenon.This article will study the minority folk dance ecology transformation based on the perspective of social historical developm...In the process of folk custom development, ecological transformation is a normal phenomenon.This article will study the minority folk dance ecology transformation based on the perspective of social historical development.The author will discuss the native pattern and variable pattern for the development of the minority folk dance and analyze the positive influence and negative influence on minority dance at this stage. To address the problems in the development, the author puts forward some countermeasures and feasible suggestions for its future development.展开更多
In the process of folk custom development, ecological transformation is a normal phenomenon.This article will study the minority folk dance ecology transformation based on the perspective of social historical developm...In the process of folk custom development, ecological transformation is a normal phenomenon.This article will study the minority folk dance ecology transformation based on the perspective of social historical development.The author will discuss the native pattern and variable pattern for the development of the minority folk dance and analyze the positive influence and negative influence on minority dance at this stage. To address the problems in the development, the author puts forward some countermeasures and feasible suggestions for its future development展开更多
China is a leading country in the production of several minor cereals such as foxtail millet,Job's tears,naked oat,and naked barley.Sorghum and proso millet have also contributed greatly to Chinese agriculture.Fox...China is a leading country in the production of several minor cereals such as foxtail millet,Job's tears,naked oat,and naked barley.Sorghum and proso millet have also contributed greatly to Chinese agriculture.Foxtail millet,sorghum,barley,and proso millet were widely grown as major crops 60 years ago,and the reduction in their cultivation area reflects historical changes in Chinese agriculture over the past decades.Systematic germplasm collections from the 1950 s to the 1990 s gathered more than 66,690 accessions of these minor cereals,and for some of them,the Chinese germplasm collections are the largest in the world;for example,the 27,700 accessions of foxtail millet.Germplasm evaluations of each cereal species have focused mainly on drought tolerance,nutritional quality,and resistance to their main diseases.Comparisons among lines and selection of those with desirable traits were the main breeding methods for minor cereals in the 1950 s and 1960 s,but these methods were replaced by crossbreeding in the 1970 s.Newly developed cultivars have greatly changed the production situation,and many super cultivars have become milestones in crop breeding history.In this review,we describe the distribution and ecoregions,origin and domestication,and landmark varieties of several minor cereals in China.Nearly all of the minor cereals are drought-tolerant and fertilizer-efficient.The requirements for environmentally friendly crops and a more diverse food supply for humans and animals provide new opportunities to cultivate minor cereals in the drier and warmer environmental conditions that are predicted in the future.展开更多
CHINA is a unified multi-ethnic country. Besides the populous Han nationality, China has 55 minorities with a population of 91.2 million, accounting for 8.04 percent of the country’s total. The area of the minority a...CHINA is a unified multi-ethnic country. Besides the populous Han nationality, China has 55 minorities with a population of 91.2 million, accounting for 8.04 percent of the country’s total. The area of the minority autonomous regions is 64.3 percent of the total national territory. Before 1949, almost all minority women in China were illiterate. Since the founding of New China, the female education among the minority nationalities has made great progress. According to the fourth national census, the female population of minorities over six years old is 38.18 million. Of these 15.3 million females have received a primary education; 7.展开更多
文摘HIV and AIDS has continued to be a major public health concern, and hence one of the epidemics that the world resolved to end by 2030 as highlighted in sustainable development goals (SDGs). A colossal amount of effort has been taken to reduce new HIV infections, but there are still a significant number of new infections reported. HIV prevalence is more skewed towards the key population who include female sex workers (FSW), men who have sex with men (MSM), and people who inject drugs (PWID). The study design was retrospective and focused on key population enrolled in a comprehensive HIV and AIDS programme by the Kenya Red Cross Society from July 2019 to June 2021. Individuals who were either lost to follow up, defaulted (dropped out, transferred out, or relocated) or died were classified as attrition;while those who were active and alive by the end of the study were classified as retention. The study used density analysis to determine the spatial differences of key population attrition in the 19 targeted counties, and used Kilifi county as an example to map attrition cases in smaller administrative areas (sub-county level). The study used synthetic minority oversampling technique-nominal continuous (SMOTE-NC) to balance the datasets since the cases of attrition were much less than retention. The random survival forests model was then fitted to the balanced dataset. The model correctly identified attrition cases using the predicted ensemble mortality and their survival time using the estimated Kaplan-Meier survival function. The predictive performance of the model was strong and way better than random chance with concordance indices greater than 0.75.
文摘In the process of folk custom development, ecological transformation is a normal phenomenon.This article will study the minority folk dance ecology transformation based on the perspective of social historical development.The author will discuss the native pattern and variable pattern for the development of the minority folk dance and analyze the positive influence and negative influence on minority dance at this stage. To address the problems in the development, the author puts forward some countermeasures and feasible suggestions for its future development.
文摘In the process of folk custom development, ecological transformation is a normal phenomenon.This article will study the minority folk dance ecology transformation based on the perspective of social historical development.The author will discuss the native pattern and variable pattern for the development of the minority folk dance and analyze the positive influence and negative influence on minority dance at this stage. To address the problems in the development, the author puts forward some countermeasures and feasible suggestions for its future development
基金supported by the China Agricultural Research System(No.CARS07-13.5-A02)the Agricultural Science and Technology Innovation Program of CAASthe Key Technology R&D Program of China during the 12th Five-Year Plan period(No.2014BAD07B01)
文摘China is a leading country in the production of several minor cereals such as foxtail millet,Job's tears,naked oat,and naked barley.Sorghum and proso millet have also contributed greatly to Chinese agriculture.Foxtail millet,sorghum,barley,and proso millet were widely grown as major crops 60 years ago,and the reduction in their cultivation area reflects historical changes in Chinese agriculture over the past decades.Systematic germplasm collections from the 1950 s to the 1990 s gathered more than 66,690 accessions of these minor cereals,and for some of them,the Chinese germplasm collections are the largest in the world;for example,the 27,700 accessions of foxtail millet.Germplasm evaluations of each cereal species have focused mainly on drought tolerance,nutritional quality,and resistance to their main diseases.Comparisons among lines and selection of those with desirable traits were the main breeding methods for minor cereals in the 1950 s and 1960 s,but these methods were replaced by crossbreeding in the 1970 s.Newly developed cultivars have greatly changed the production situation,and many super cultivars have become milestones in crop breeding history.In this review,we describe the distribution and ecoregions,origin and domestication,and landmark varieties of several minor cereals in China.Nearly all of the minor cereals are drought-tolerant and fertilizer-efficient.The requirements for environmentally friendly crops and a more diverse food supply for humans and animals provide new opportunities to cultivate minor cereals in the drier and warmer environmental conditions that are predicted in the future.
文摘CHINA is a unified multi-ethnic country. Besides the populous Han nationality, China has 55 minorities with a population of 91.2 million, accounting for 8.04 percent of the country’s total. The area of the minority autonomous regions is 64.3 percent of the total national territory. Before 1949, almost all minority women in China were illiterate. Since the founding of New China, the female education among the minority nationalities has made great progress. According to the fourth national census, the female population of minorities over six years old is 38.18 million. Of these 15.3 million females have received a primary education; 7.
