元代畏兀儿农学家鲁明善事迹再探讨

鲁明善是元代著名的农学家,生于高昌(今新疆吐鲁番),后迁居内地,著有《农桑衣食撮要》一书。此书流传至今,在中国农学史上具有独特的价值。本文在认真研读元人碑刻及其他传世文献的基础上,就鲁明善的名号、出生地、为官经历等相关问题进行考述,并分析这位畏兀儿农学家的处世态度和政治理想。     

Early history of Chinese domestic sheep indicated by ancient DNA analysis of Bronze Age individuals

China has a long history of sheep husbandry, and has several indigenous sheep breeds. However, the exact geographic origin of Chinese domestic sheep remains unclear. To provide valuable genetic information for origin of Chinese domestic sheep, we performed an ancient DNA study on 22 sheep excavated from four Bronze Age archaeological sites in Northern China. Two lineages (A and B) were observed in ancient Chinese sheep, of which lineage A was predominant reaching a frequency of 95.5%. Furthermore, phylogenetic network showed that the most frequent haplotype in ancient sheep was the founder of lineage A. These results suggest that Lineage A may hold the key to understanding the origin of Chinese domestic sheep. Sequence sharing and principal component analysis showed that the ancient Chinese sheep had a close affinity to modern Chinese sheep. However, there was no significant breed structure among three modern Chinese sheep groups, making it difficult to determine their relationship to ancient Chinese sheep. Lastly, our results imply that ancient DNA analysis could provide a new way to investigate prehistoric East-West contact.     

气味景观感知对乡村地方依恋的影响机制研究——兼论怀旧的中介作用

气味的作用是潜移默化的，本文在乡村旅游情境下，运用结构方程研究了气味景观感知对于地方依恋的影响作用。研究发现：①乡村气味景观感知显著地正向影响旅游者地方依恋；②乡村气味景观感知对于怀旧有显著的正向影响；③历史怀旧对地方依赖有显著正向影响，个人怀旧对于地方依赖和地方认同均有显著正向影响；④怀旧在气味景观感知和地方依恋之间的中介效应得到验证。研究证实了气味景观的重要作用，明晰了怀旧在乡村旅游体验中的核心地位，对丰富旅游体验和打造乡村旅游景观具有一定的启示意义。     

西周时期时间观述论

西周人们继承和发展了以往的记时方式,能够利用年份、四季和月相来表达自然时序。人们创造和享受为自己服务的岁时文化的同时,服从于特定的时间规范,使得社会自身的运作完全在顺时意识支配下进行。客观时间内化为主观时间,具有了更多的伸缩性。