Ontogeny of Size and Shape Sexual Dimorphism in the Ilium: A Multislice Computed Tomography Study by Geometric Morphometry

We studied sexually dimorphic differences in the ilium using geometric morphometric analysis of 10 osteometric landmarks recorded by multislice computed tomography, based on three‐dimensional reconstructions of 188 children (95 boys, 93 girls) of mixed origins living in the area of Toulouse, southern France, and ranging in age from 1 to 18 years. We used geometric morphometrics methodology first to test sexual dimorphism in size (centroid size) and shape (Procrustes residuals) and second to examine patterns of shape change with age (development) and size change with age (growth). On the basis of statistical significance testing, the ilium shape became sexually dimorphic at 11 years of age, although visible shape differences were observed as early as 1 year of age. There was no statistically significant difference in size between sexes. Trajectories of shape (development) and size (growth) differed throughout ontogeny and between sexes.     

Patterns of Variation and Match Rates of the Anterior Biting Dentition: Characteristics of a Database of 3D‐Scanned Dentitions

An understanding of the variability of the anterior human dentition is essential in bitemark analysis. A collection of 1099 3D laser scans of paired maxillary and mandibular arches were studied using geometric morphometric methods. Analyses were performed without scale (shape only) and with scale (shape and size). Specimens differing by no more than experimentally obtained measurement error were counted as matches, or as indistinguishable. A total of 487 maxillary (396 size preserved), 131 mandibular (83 size preserved), and one paired dentition (two size preserved) matches were found. Principal component analysis and partial least squares revealed interpretable patterns of variation and covariation in dental shape, principally dominated by variation in dental arch width. The sensitivity of match rate to assumed degree of measurement error was also determined showing rapid increases in match rate as measurement error increased. In conclusion, the concept of dental uniqueness with regard to bitemark analysis should be approached with caution.     

路试充分发出平均减速度可取信范围分析

当我们使用便携式制动性能测试仪来检验涉案车辆制动性能,为什么有时获得的充分发出的平均减速度（MFDD,mean fully developed deceleration）值会大于重力加速度g,这些较大的MFDD值与《便携式制动性能测试仪校准规范》中的测量范围是否相冲突,这些检测值在车速等运算中是否可以被采信,路试检验MFDD的有效范围是什么,鉴定业界对这些问题有着诸多争议和不同答案。本文旨在对路面摩擦系数进行讨论,并利用达朗贝尔原理建立车辆制动受力模型,从而证明高于g的充分发出的平均减速度在路试检验中可以成立,并确认了该值的可以取信范围0~l1h×g。     

建构一种中道的社会福利体制

《社会福利和个人责任》一书是两种福利观矛盾冲突的反映：古定教授代表传统的社会责任福利观，舒米兹教授代表现代的个人责任福利观。他们以辩论的方式合作写作，与其说他们是在那里辩论谁是谁非，不如把这场辩论看作是他们合作构造一种中道的或混合的社会福利体制的努力更为恰当。     

Some cautionary notes on the use of the Sellin-Wolfgang index of crime seriousness

This article points out that the analysis of Sellin-Wolfgang crime seriousness scores requires some standardization with regard to coding limits and, especially, in the method of handling zero scores. Also, suitable confidence intervals are derived for the geometric mean of the Sellin-Wolfgang scores.     

From Dayton to Bernese Jura: The Election of the Croat Member of the Presidency of Bosnia and Herzegovina

After the signing of the Dayton Agreement, critical literature has attempted to portray consociation in Bosnia and Herzegovina as the predominant source of the country's political problems. At the same time, this literature has widely neglected the centripetal rules that have existed since the first elections of the tripartite Presidency. The paper analyzes the outcomes of the existing centripetal cross-ethnic vote pooling rules. It concludes that such outcomes are negative and it then discusses a possible solution by drawing inspiration from the application of the Bernese Jura's geometric mean. The paper focuses on the election of the Croat member in the tripartite Presidency as representative of the least numerous ethnic group. We argue that the application of the geometric mean based upon results in Croat-majority municipalities could eliminate certain grievances and weakens the chances for election of the Croat member by voters from dominantly Bosniak areas.     

Ancestry Estimation in Forensic Anthropology: Geometric Morphometric versus Standard and Nonstandard Interlandmark Distances

Standard cranial measurements are commonly used for ancestry estimation; however, 3D digitizers have made cranial landmark data collection and geometric morphometric (GM) analyses more popular within forensic anthropology. Yet there has been little focus on which data type works best. The goal of the present research is to test the discrimination ability of standard and nonstandard craniometric measurements and data derived from GM analysis. A total of 31 cranial landmarks were used to generate 465 interlandmark distances, including a subset of 20 commonly used measurements, and to generate principal component scores from procrustes coordinates. All were subjected to discriminant function analysis to ascertain which type of data performed best for ancestry estimation of American Black and White and Hispanic males and females. The nonstandard interlandmark distances generated the highest classification rates for females (90.5%) and males (88.2%). Using nonstandard interlandmark distances over more commonly used measurements leads to better ancestry estimates for our current population structure.     

Sexual dimorphism in America: geometric morphometric analysis of the craniofacial region

One of the four pillars of the anthropological protocol is the estimation of sex. The protocol generally consists of linear metric analysis or visually assessing individual skeletal traits on the skull and pelvis based on an ordinal scale of 1-5, ranging from very masculine to very feminine. The morphologic traits are then some how averaged by the investigator to estimate sex. Some skulls may be misclassified because of apparent morphologic features that appear more or less robust due to size differences among individuals. The question of misclassification may be further exemplified in light of comparisons across populations that may differ not only in cranial robusticity but also in stature and general physique. The purpose of this study is to further examine the effect of size and sex on craniofacial shape among American populations to better understand the allometric foundation of skeletal traits currently used for sex estimation. Three-dimensional coordinates of 16 standard craniofacial landmarks were collected using a Microscribe-3DX digitizer. Data were collected for 118 American White and Black males and females from the W.M. Bass Donated Collection and the Forensic Data Bank. The MANCOVA procedure tested shape differences as a function of sex and size. Sex had a significant influence on shape for both American Whites (F = 2.90; d.f. = 19, 39; p > F = 0.0024) and Blacks (F = 2.81; d.f. = 19, 37; p > F = 0.0035), whereas size did not have a significant influence on shape in either Whites (F = 1.69; d.f. = 19, 39; p > F = 0.08) or Blacks (F = 1.09; d.f. = 19, 37; p > F = 0.40). Therefore, for each sex, individuals of various sizes were statistically the same shape. In other words, while significant differences were present between the size of males and females (males on average were larger), there was no size effect beyond that accounted for by sex differences in size. Moreover, the consistency between American groups is interesting as it suggests that population differences in sexual dimorphism may result more from human variation in size than allometric variation in craniofacial morphology.     

Institutional quality and economic growth: Evidence from South-Asian countries

The current study investigates the relationship between institutional quality and economic growth, focusing on South-Asian countries entailing Bangladesh, Bhutan, India, Nepal, Pakistan, and Sri Lanka, from 2002 to 2018. The data are analysed using the dynamic heterogeneous panel (panel autoregressive distributed lag [ARDL] model) approach, specifically the dynamic fixed effect (DFE), mean group (MG), and pooled mean group (PMG). Based on the findings, the three governance indicators, namely corruption control, accountability, and the rule of law, positively and significantly affect economic growth. All the nations have consistent long-run estimates but varied short-run estimates and adjustment speed for the long-term equilibrium. This is due to governance volatility that is evident in all the nations. This article offers both practical and theoretical contributions. This article contributes to the institutional quality and economic growth literature from a theoretical perspective from the South-Asian perspective. From a practical perspective, the study findings are significant for policymakers, particularly those from the countries that demonstrate major fiscal and external imbalance due to war and terrorism, low oil prices and weak trade. Hence, there is a pressing need to address economic growth issues instigated by the policymakers' negligence to ensure appropriate governance and macroeconomic management. Regulators can improve economic growth through national and regional image building by developing a stable economic and political landscape and maintaining macroeconomic stability by improving the institutional quality indicators. There is evidence that institutional quality improvement leads to better economic growth.     

我国中小企业成本管理探析

在当今激烈的市场竞争环境中,成本的降低是增加利润的有效方法之一,降低成本已成为企业发展首先要解决的重要问题。一个企业要想在庞大的市场中站稳脚跟、寻求发展,就必须适应市场经济的要求,让企业低投入、高产出。为推动中小企业的成本管理,必须从成本入手,并针对中小企业成本管理存在的问题,提出降低成本的可行途径。