从苗族古歌看苗族传统林业知识

有“苗族古代社会生活的百科全书”之称的《苗族古歌》综合反映了苗族古代社会的情况。传统林业思想是其科技文化中的一个重要方面。本文以古歌原文为依据 ,论述了它所反映的制种、整地、播种、移栽、砍伐、使用等的全过程。展现了苗族为丰富祖国林业文化所做出的贡献。     

Third time lucky? Establishing diplomatic relations between Russia and South Africa

Diplomatic relations between Russia and South Africa were established in 1992, before South Africa's transition to democracy was completed. This move was perceived as a betrayal by many in both countries and beyond. For many decades the Soviet Union supported the African National Congress in its fight against the apartheid regime. South Africa's National Party government, in its turn, presented the USSR as the main force behind the ‘total onslaught’ – an all-out war purportedly waged against South Africa by international communism. Yet it was with the National Party government that the Russians established diplomatic relations. This article looks into the reasons for this change of heart in Moscow and Pretoria, discusses the political forces behind the decision to establish diplomatic relations, and analyses the process that led to this event and the results of establishing diplomatic relations the way it happened and at the time it happened for both countries.     

法医学二代测序STR分型准确度与测序深度的关联性评估

目的利用实验数据对法医学二代测序STR分型测序深度与分型结果准确度的关联性进行评估。方法使用商业化基因组DNA制备单一来源和混合的DNA样本,以Thermo Fisher公司的25重早期测试试剂盒进行目的STR片段扩增,每种扩增产物分别使用4种不同的序列标签平行建库,并控制标记每一种序列标签的文库上机量依次占一张Ion 318芯片的1/4、1/8、1/16、1/32。经Ion PGMTM基因测序仪测序,以及Ion Torrent SuiteTM软件进行数据分析;同时对庞敬博等人发表的基于相同试剂盒和测序仪检测的95名中国汉族无关个体的6928条等位基因、影子峰和噪音序列进行测序深度统计分析,寻找测序深度与STR分型准确度的关联性。结果各基因座测序深度随文库上样量减少而呈明显下降趋势。对于单一来源样本,每张芯片上样不超过8个均一化文库可实现全部基因座的完整分型;对于1∶20比例的混合DNA,每张芯片上样不超过4个均一化文库时,未发现微量组分的等位基因丢失。人群数据测序深度统计显示,该体系基因座间存在不均衡性,有必要针对各基因座分别设定分析阈值参数。结论测序深度与法医学STR分型结果的准确性密切相关,各基因座最低测序深度与平均测序深度的比值可作为设定分析阈值的重要参考指标。本研究确定的单张芯片上样数量仅适用于本实验体系,但相关实验设计和方案可供其他实验体系开展类似工作参考。     

Chick lit politics in a post-truth era: tricksters,blessees and postfeminist girlpower in Angela Makholwa’s The Blessed Girl

The possibility of an emancipated politics in chick lit novels remains a contested question among postfeminist critics. Drawing on definitions of postfeminism as a transnational sensibility, this article examines South African chick lit in relation to what has been termed post-truth or trickster politics in the context of the rise of politicians, such as Donald Trump. I read Angela Makholwa’s novel The Blessed Girl as an example of African chick lit that features a blessee narrator, a young woman who lives a luxurious lifestyle financed by older men, who is deeply influenced by a Trumpian mode of self-making. By employing a trickster aesthetic and narrative strategies, such as unreliable narration and reader address, the novel, I argue, however also unsettles established parameters of neoliberal girlpower, moving beyond its assumed anti-politicalness, as well as a simple understanding of the blessee figure through either a lens of victimhood or amorality.     

2,4,6-Tri(2′-pyridyl)-1,3,5-triazine for determination of iron(II), Iron(III), and total iron contents on human palms

When iron-based tools, such as knives or guns, are held, traces of iron can transfer to the skin. However, no previous studies have been published regarding the effect of the elapsed contact time on the transfer of iron species with different valences to the palm. Compared with 3-(2-pyridyl)-5,6-diphenyl-1,2,4-triazine (PDT), 2,4,6-tri(2′-pyridyl)-1,3,5-triazine (TPTZ) was found to exhibit a higher sensitivity to iron(II) spectrophotometrically. This work employed 2,4,6-tri(2′-pyridyl)-1,3,5-triazine (TPTZ) and UV spectrophotometry to determine the amounts of iron(II), iron(III), and total iron transferred to human palms from iron tools. It was found that the palmar moisture level was an important factor in determining the amounts of total iron, including iron(II), transferred to the palm. For identical contact times, the amounts of total iron transferred to the palm was proportional to the palmar moisture, and the difference between the maximum and minimum amounts was 12 μg per hand. However, the amounts of iron(II) transferred to the palm gradually decreased over time for low palmar moisture levels, but steadily increased over time for high palmar moisture levels. Additionally, for average levels of palm moisture, the amounts of iron(II) and iron(III) transferred to the palm gradually decreased and increased, respectively, with longer contact times. Notably, this research could serve as a theoretical basis and guide for the detection of trace iron species with different valences on human palms for criminal investigations.     

Characterization of an odor permeable membrane device for the storage of explosives and use as canine training aids

The storage and use of explosives is regulated at the state and federal level, with a particular focus on physical security and rigorous accounting of the explosive inventory. For those working with explosives for the training and testing of explosive-detecting canines, cross-contamination is an important concern. Hence, explosives intended for use with canine teams must be placed into secondary storage containers that are new, clean, and airtight. A variety of containers meet these requirements and include screw-top glass jars (e.g., mason jars). However, an additional need from the explosive-detecting canine community is secondary containers that can also be used as training aids whereby the volatiles emitted by explosives are emitted in a predictable and stable manner. Currently, a generally accepted method for the storage of explosives and controlled emission of explosive vapor for canine detection does not exist. Ideally, such containers should allow odor to escape from the training aid but block external contaminates such as particulates or other volatiles. One method in use places the explosive inside a permeable cotton bag when in use for training and then stores the cotton bag inside an impermeable nylon bag for long-term storage. This paper describes the testing of an odor permeable membrane device (OPMD) as a new way to store and deploy training aids. We measured the evaporation rate and flux of various liquid explosives and volatile compounds that have been identified in the headspace of actual explosives. OPMDs were used in addition to traditional storage containers to monitor the contamination and degradation of 14 explosives used as canine training aids. Explosives were stored individually using traditional storage bags or inside an OPMD at two locations, one of which actively used the training aids. Samples from each storage type at both locations were collected at 0, 3, 6, and 9 months and analyzed using Fourier Transform Infrared (FTIR) Spectroscopy and Gas Chromatography–Mass Spectrometry (GC–MS) with Solid-Phase Microextraction (SPME). FTIR analyses showed no signs of degradation. GC–MS identified cross-contamination from ethylene glycol dinitrate (EGDN) and/or 2,3-dimethyl-2,3-dinitrobutane (DMNB) across almost all samples regardless of storage condition. The contamination was found to be higher among training aids that were stored in traditional ways and that were in active use by canine teams.     

国家治理现代化与执政方式的完善

执政者是国家治理中最为关键的能动者,其执政方式的合理与否直接决定着国家治理的效果,也关系到执政者的地位。中国共产党是国家治理现代化的倡导者和推动者,也因应着现代化的需要不断进行着自身的现代化。党的执政方式有很强的历史传承性,深受党的革命历程和成功经验的影响。党建立新中国后,开始在自己创建的国家治理体系中进行执政方式的现代化探索,当下正进行第三次现代化的探索,要根据国家治理体系和治理能力现代化的总要求抓住关键环节,加以改进和提高。     

Technology and Politics: Have the ICTs Turned into a Domain for Civil–Military Relations in Turkey?

The implications of technology have been widely acknowledged in international relations. Studies ranging from the causes of war and military effectiveness to terrorism and nuclear proliferation have explored how technology shapes international politics. However, the implications of technology in domestic politics have not been scrutinised much. This paper helps fill this vacuum through an analysis of Turkey’s civil–military relations. Although civilian control over the Turkish military has improved in the past decade, this process has not been smooth. With a focus on the recent court cases involving the military, the 2007 e-memorandum and the transfer of electronic military intelligence apparatus to the civilian authority, this paper demonstrates how technology has become an important domain for civil–military relations in Turkey.     

Gender dimensions of decision-making on production assets and challenges facing women

This article investigates gender dimensions of decision-making on access to, and control over, productive assets for agricultural development in selected communities in Ghana. The men were more educated, resourced, and economically empowered than the women. This resulted in differential access to, and control over, resources by gender and a low level of female participation in decision-making. The study identified a land access gap by gender and crop acreage gap of up to 80% for women as compared to men. Challenges limiting women in agricultural production and processing include inadequate land access, inadequate capital, inefficient processing technologies, and unattractive markets.