a joint venture （iV） between China＇s Shandong Huawei Security Group and Raid Private Security of South Africa, was launched in Johannesburg, It was the first time in the history of South Africa＇s security industry...a joint venture （iV） between China＇s Shandong Huawei Security Group and Raid Private Security of South Africa, was launched in Johannesburg, It was the first time in the history of South Africa＇s security industry that a Chinese company had formed a JV with a local outfit. The aim is to provide security services to Chinese businesses and businesspeople in South Africa in what is seen as a broader vision to protect the interests of Chinese overseas investors.展开更多
ONCE Manshiyat Nasr, a ward in Cairo, used to be one of the poorest areas in the Egyptian capital. It was known as ＂garbage city＂ because of its large community of rag-pickers.
Artists talk about the sometimes uncomfortable relationship between art and money "In the 1980s, we still called it the art world, but now we call it the art market," said Eric Fischl, an internationally acc...Artists talk about the sometimes uncomfortable relationship between art and money "In the 1980s, we still called it the art world, but now we call it the art market," said Eric Fischl, an internationally acclaimed American painter and sculptor at a panel on the relationship between the arts and the marketplace during the U.S.-China Forum on Arts and Culture last month.展开更多
Altruism is difficult to explain evolutionarily and to understand it,there is a need to quantify the benefits and costs to altruists.Hamilton’s theory of kin selection argues that altruism can persist if the costs to...Altruism is difficult to explain evolutionarily and to understand it,there is a need to quantify the benefits and costs to altruists.Hamilton’s theory of kin selection argues that altruism can persist if the costs to altruists are offset by indirect fitness payoffs from helping related recipients.Nevertheless,helping nonkin is also common and in such situations,the costs must be compensated for by direct benefits.While previous researchers tended to evaluate the indirect and direct fitness in isolation,we expect that they have a complementary interaction where altruists are associated with recipients of different relatedness within a population.The prediction is tested with 12years of data on lifetime reproductive success for a cooperatively breeding bird,Tibetan ground tits Pseudopodoces humilis.Helpers who helped distantly related recipients gained significantly lower indirect benefits than those who helped closely related recipients,but the opposite was true for direct fitness,thereby making these helpers have an equal inclusive fitness.Helping efforts were independent of helpers’relatedness to recipients,but those helping distantly related recipients were more likely to inherit the resident territory,which could be responsible for their high direct reproductive success.Our findings provide an explanatory model for the widespread coexistence of altruists and recipients with varying relatedness within a single population.展开更多
文摘a joint venture （iV） between China＇s Shandong Huawei Security Group and Raid Private Security of South Africa, was launched in Johannesburg, It was the first time in the history of South Africa＇s security industry that a Chinese company had formed a JV with a local outfit. The aim is to provide security services to Chinese businesses and businesspeople in South Africa in what is seen as a broader vision to protect the interests of Chinese overseas investors.
文摘ONCE Manshiyat Nasr, a ward in Cairo, used to be one of the poorest areas in the Egyptian capital. It was known as ＂garbage city＂ because of its large community of rag-pickers.
文摘Artists talk about the sometimes uncomfortable relationship between art and money "In the 1980s, we still called it the art world, but now we call it the art market," said Eric Fischl, an internationally acclaimed American painter and sculptor at a panel on the relationship between the arts and the marketplace during the U.S.-China Forum on Arts and Culture last month.
基金supported by the National Natural Science Foundation of China(31830085)the Second Tibetan Plateau Scientific Expedition and Research program(2019QZKK0501).
文摘Altruism is difficult to explain evolutionarily and to understand it,there is a need to quantify the benefits and costs to altruists.Hamilton’s theory of kin selection argues that altruism can persist if the costs to altruists are offset by indirect fitness payoffs from helping related recipients.Nevertheless,helping nonkin is also common and in such situations,the costs must be compensated for by direct benefits.While previous researchers tended to evaluate the indirect and direct fitness in isolation,we expect that they have a complementary interaction where altruists are associated with recipients of different relatedness within a population.The prediction is tested with 12years of data on lifetime reproductive success for a cooperatively breeding bird,Tibetan ground tits Pseudopodoces humilis.Helpers who helped distantly related recipients gained significantly lower indirect benefits than those who helped closely related recipients,but the opposite was true for direct fitness,thereby making these helpers have an equal inclusive fitness.Helping efforts were independent of helpers’relatedness to recipients,but those helping distantly related recipients were more likely to inherit the resident territory,which could be responsible for their high direct reproductive success.Our findings provide an explanatory model for the widespread coexistence of altruists and recipients with varying relatedness within a single population.
