Interpreting DNA Mixtures with Related Contributors in Subdivided Populations

Abstract.  In this paper, we study the statistical interpretation of forensic DNA mixtures with related contributors in subdivided populations. Compact general formulae for match probabilities are obtained for two situations: a relative of one tested person is an unknown contributor of a DNA mixture; and two related unknowns are contributors. The effect of kinship and population structure is illustrated using a real case example.     

Efe fathers: one among many? A comparison of forager children's involvement with fathers and other males

The study reported describes Efe (pygmy) forager one-, two-, and three-year-olds' involvement with males. The Efe of northeastern Zaïre were chosen because their social organization allows us to examine hypotheses based on studies in Western, technologically complex societies about the distinctive role fathers play in the lives of their young children. Behavioral observations of Efe children's day-to-day activities with fathers, men and boys were recorded using a focal subject sampling technique (Altmann, 1974). Two behavioral measures were created to capture the extent to which males were involved with children: Social engagement describes males' involvement with children and social attention describes eavesdropping by children on males' everyday activities. Eight one-year-olds, 7 two-year-olds and 8 three-year-olds were each observed for six, one-hour observation sessions that were distributed evenly over the daylight hours. Data were analyzed using the traditional measure of involvement (e.g., adult males) and using a newly developed measure of the involvement of the average individual (e.g., average adult mate). Comparisons at each of the ages showed that fathers were consistently like other men in the extent to which children participated in social activities with them and watched their activities. Only fathers' level of social engagement declined significantly as children grew older. Boys' role relative to other males became increasingly distinctive as children aged. The findings suggest that Efe fathers may not be unique in the same sense assumed by Western study ideals, and raise questions about the special status given to fathers in Western theory and data. The patterning of mate involvement with children is discussed in terms of Efe community life, and in terms of Efe children's developing understanding of their relationship with fathers and other males.     

城域网MAC层协议的优先级结构及性能

主要研究城域网MAC层标准“IEEE 802.6 DQDB”协议的优先故排队性能;提出了一种DQDB协议的优先级实现方案—β分级结构。通过本文给出的文件传输性能分析以及计算机模拟证明,这种新的优先级结构可取得比DQDB现有结构更好的性能,而且易于实现。     

铝基化学镀镍的研究

研究了铝基化学镀镍的工艺过程，详细介绍了化学镀镍前的处理过程，其中包括除油，浸蚀，清洗和没锌过程。研究了各因素对化学镀镍镀速的影响因素，并得出最佳配方及工艺条件。在最佳条件下，化学镀镍镀速高，镀层着附力优异，可焊性优良。     

生态价值论视野下的循环经济

循环经济作为新的经济发展方式不仅建立在劳动价值论的基础上,而且体现了生态价值论的基本理念。在循环经济活动中人们以复杂劳动创造了价值,复杂劳动主要包括通过科技创新对工业工艺流程进行改造,通过系统工程协调工业布局。人们不仅在循环经济中创造了价值而且保护、节省和储存了生态价值,因为循环经济拓宽了自然资源的利用范围,提高了单位资源的产出率,降低了单位产品的资源消耗。传统工业经济发展的问题在于没有解决劳动价值和生态价值的平衡关系,对劳动价值的单一追求,意味着对生态价值的忽视,这是工业经济发展思路狭隘的致命之处。生态经济价值是循环经济富有特色的价值形态,体现了循环经济将劳动价值和生态价值兼顾和融合的特点,体现了经济发展方式的新视野即经济活动应该具有环境良好的出发点和落脚点。生态经济价值是在劳动价值与生态价值对立关系基础上实现统一关系的产物,体现了经济领域中的价值关系辩证法。     

论红三角地区生态旅游的可持续发展

红三角地区具有旅游合作的良好基础,拥有丰富的生态旅游资源,本文分析了红三角地区发展生态旅游的优势及存在的问题,并提出了相应的可持续发展思路。     

论王夫之历史观的理性精神

王夫之学贯古今,思通过去、现在与未来。他对历史上种种神秘史学主张的尖锐批判,对“理势相契”论和“相天造命”说的深刻阐述,展现了他的史学思想推倒一切的革命精神和破除迷信的理性光彩。     

中国古代诗歌意象批评的发展及其特征

我国古代诗歌意象批评的发展经历了五个阶段,即萌生期、成型期、繁盛期、深化期、完善期;其特征则主要表现在喻象性、张力性、审美性三个方面。     

我国政府基本建设投资的问题分析与对策

政府投资在我国基本建设中扮演着重要角色,但目前我国存在政府财政提取能力差,城市税费征收执行不规范,预算外资金管理失控等问题,这限制了其在基本建设中的作用。要使政府投资能更好地发挥引导作用,就要开辟政府投资来源渠道,严格资金管理。