Craniofacial reconstruction as a prediction problem using a Latent Root Regression model

In this paper, we present a computer-assisted method for facial reconstruction. This method provides an estimation of the facial shape associated with unidentified skeletal remains. Current computer-assisted methods using a statistical framework rely on a common set of extracted points located on the bone and soft-tissue surfaces. Most of the facial reconstruction methods then consist of predicting the position of the soft-tissue surface points, when the positions of the bone surface points are known. We propose to use Latent Root Regression for prediction. The results obtained are then compared to those given by Principal Components Analysis linear models. In conjunction, we have evaluated the influence of the number of skull landmarks used. Anatomical skull landmarks are completed iteratively by points located upon geodesics which link these anatomical landmarks, thus enabling us to artificially increase the number of skull points. Facial points are obtained using a mesh-matching algorithm between a common reference mesh and individual soft-tissue surface meshes. The proposed method is validated in term of accuracy, based on a leave-one-out cross-validation test applied to a homogeneous database. Accuracy measures are obtained by computing the distance between the original face surface and its reconstruction. Finally, these results are discussed referring to current computer-assisted reconstruction facial techniques.     

近视者最佳矫正视力与屈光参数间的相关性

目的 探究近视者最佳矫正视力(best corrected visual acuity,BCVA)与屈光参数等相关指标之间的相关性.方法 选取2274例(4245眼)不同程度近视者,检测近视者的BCVA和球镜屈光度(diopter ofspherical,DS)、柱镜屈光度(diopter of cylinder,DC...     

盗取骨髓事件:身体权问题的法律和伦理

沈阳市某医院盗取病人骨髓事件所折射出的身体权问题,值得人们进行深入思考。西方学者对身体权问题的探讨,对我国身体权立法有一定的启发,有助于法律对身体权予以更有力、更全面的保护。即使我们不能将身体权直接规定为一种特殊的财产权,但至少应当也可以明确身体权的所有权性质,而不是仅仅将其规定为一种人格权。盗窃骨髓事件应该成为医疗行业在职业道德方面的一面镜子。医生不仅必须依法行医,而且还应当有较强的职业道德观念。医生应当充分尊重患者的权利,始终以患者为目的,而不是仅把患者当作谋取私利或小团体利益的手段。     

Bidirectional Associations Between Sibling Relationships and Parental Support During Adolescence

Sibling relationships and parental support are important for adolescents’ development and well-being, yet both are likely to change during adolescence. Since adolescents participate in both the sibling relationship and the parent–child relationship, we can expect sibling relationships and parental support to be associated with each other. Theoretically, it can be expected that there is either a spillover from one relationship to another (congruence hypothesis) or that one relationship can compensate for the other (compensation hypothesis). However, research examining these associations in adolescence is limited. The present study longitudinally investigated the bidirectional associations between sibling relationships and parental support during adolescence. For five consecutive years, data were collected using self-reports of 428 families, consisting of a father, a mother, and two adolescent siblings. The mean ages of the first-born (52.8% males) and second-born (47.7% males) were 15 and 13 years at T1, respectively. For the second-born siblings, prospective associations were found between sibling relationships and adolescent-reported parental support in early adolescence, with no differences between same-sex and mixed-sex dyads. These associations were not found for first-born siblings or for parents’ reports of support. The findings suggest a spillover from the sibling relationship to adolescent-reported parental support only in early adolescence. Findings and implications are discussed in terms of the congruence/spillover and the compensation hypothesis.     

大学生毕业实习存在问题分析

毕业实习是大学生学习进程中必备的课程,但在这个进程中存在一个值得关注的问题：挑剔对待毕业实习。笔者通过有关的调查,在此基础上分析了大学生挑剔对待毕业实习的原因,其中有大学生自身的因素,家长的＂护犊＂情结,学校的教育以及接收大学生毕业实习的单位等因素。从而找出了解决大学生挑剔对待毕业实习的一些方法,为完善大学生毕业实习工作提出点滴对策。     

牢牢把握抗战的主动权——七七事变后周恩来与国统区党的建设

“七七”卢沟桥事变爆发，中国全面抗战开始，为团结一切力量共同对敌，在我党多次努力下，９月２２日遂与国民党政府达成共同抗战协议，抗日民族统一战线形成。为继续同国民党协商，推进统一战线工作，１９３７年１１月，党中央决定成立以周恩来为首的中共代表团。代表团对内是中共长江局，领导国民党统治的南方中国党的组织及新四军工作。由于十年内战期间，国民党反动派的残酷镇压，及多次左倾冒险主义造成的后果，长江流域及南方各省的共产党组织普遍被破坏。据有关资料记载，“除１４个游击根据地保存一些党的力量以外，在整个国民党统…