A Hands-On Organ-Slicing Activity to Teach the Cross-Sectional Anatomy

The presentation of pre-sliced specimens is a frequently used method in the laboratory teaching of cross-sectional anatomy. In the present study, a new teaching method based on a hands-on slicing activity was introduced into the teaching of brain, heart, and liver cross-sectional anatomy. A randomized, controlled trial was performed. A total of 182 third-year medical students were randomized into a control group taught with the prosection mode (pre-sliced organ viewing) and an experimental group taught with the dissection mode (hands-on organ slicing). These teaching methods were assessed by testing the students' knowledge of cross-sectional specimens and cross-sectional radiological images, and analyzing students' feedback. Using a specimen test on three organs (brain, heart, and liver), significant differences were observed in the mean scores of the control and experimental groups: for brain 59.6% (±14.2) vs. 70.1% (±15.5), (P < 0.001, Cohen's d = 0.17); for heart: 57.6% (±12.5) vs. 75.6% (±15.3), (P < 0.001, d = 0.30); and for liver: 60.4% (±14.5) vs. 81.7% (±14.2), (P < 0.001, d = 0.46). In a cross-sectional radiological image test, better performance was also found in the experimental group (P < 0.001). The mean scores of the control vs. experimental groups were as follows: for brain imaging 63.9% (±15.1) vs. 71.1% (±16.1); for heart imaging 64.7% (±14.5) vs. 75.2% (±15.5); and for liver imaging 61.1% (±15.5) vs. 81.2% (±14.6), respectively. The effect sizes (Cohen's d) were 0.05, 0.23, and 0.52, respectively. Students in the lower tertile benefited the most from the slicing experiences. Students' feedback was generally positive. Hands-on slicing activity can increase the effectiveness of anatomy teaching and increase students' ability to interpret radiological images.     

理工科女大学生心理现状与体育运动行为动机的研究

理工科女大学生在学习研究、择业就业中所遇到的各类具体问题与所处的现实环境而引发的各种心理现状,不同程度地体现在她们体育运动的行为动机中.具体表现为：1）主观上男女生对体育运动持相同的态度,但在体育运动行为表现中,女生的锻炼时间与男生呈显著的差异;2）为适应择业就业残酷,学校体育为其意志品质的形成,人际关系的发展,竞争意识的增强等方面创造了良好的条件和机会.但在具体的实践中,其体育运动行为与之不相适应;3）理工科女大学生在心理状态上具有相矛盾的一面,在体育运动中表现出了追求美、追求知识、追求时尚、追求轻松的心理特征.     

当前教育之怪现象及其深思考

针对当前教育中出现的与素质教育严重相悖离的令人痛心的现象,本文分析这些复杂的现象,剖析其产生的深层原因,提出相应的积极对策:一、迅速出台科学的考试评价制度,改变课程评价过分强调甄别选拔功能,建立和发挥评价制度促进学生发展、教师提高和改进教学实践的机制和功能.高考应在考试中明确安排实践与创新的测试评价内容与比重,改革高考笔试成绩定一切的现行做法,将一些实践创新能力的测试分解到中学各个年级中去落实.二、建立一系列的素质教育理念“面向全体“、“全面发展“,坚决执行就近入学,划片招生.三、建立、健全一系列具体的监督管理和法律法规机制并严格执行,增强执法力度:收费收支两条线制度,教育“110“举报报警专项服务,分片包干责任制.     

在Windows中安装Apache2和PHP5

Apache2和PHP5是目前创建交互式网站的流行方案.在Windows中安装Apache 2是一件比较容易的事情,但要使PHP5与Apache 2配合无问地运行,就需要一定的技巧.主要介绍在Windows中安装Apache2和PHP5以及配置的方法.     

课堂环境下英语专业学生主动词汇发展调查研究

通过对新疆财经大学外国语学院英语专业2004级67名学生进行为期一年的词汇跟踪测试,试图探索在课堂环境下,英语专业学生主动词汇的发展变化情况。研究发现,经过一年的英语学习,英语专业学生的控制性主动词汇取得了明显进步,尤其是在2000词频级;自由主动词汇量的明显增长只发生在1000和AWL词频级。同时,学生控制性主动词汇的发展和自由主动词汇的发展不存在相关关系。     

注射用人参总皂苷的制备工艺研究

目的：按国家新的中药注射剂注册要求制备注射用人参总皂苷。方法：醇提水沉与大孔吸附树脂法进行提取与分离纯化,氧化铝与活性碳除色素。结果：人参总皂苷纯度达85％以上,其它指标符合注射剂的质量要求。结论：上述方法可以制备注射用人参总皂苷。符合国家新的药品注册管理规定而且对色素的除去工艺为首次报道。     

Target region location based on texture analysis and active contour model

Traditional texture region location methods with Gabor features are often limited in the selection of Gabor filters and fail to deal with the target which contains both texture and non-texture parts.Thus,to solve this problem,a two-step new model was proposed.In the first step,the original features extracted by Gabor filters are applied to training a self-organizing map (SOM) neural network and a novel merging scheme is presented to achieve the clustering.A back propagation (BP) network is used as a classifier to locate the target region approximately.In the second step,Chan-Vese active contour model is applied to detecting the boundary of the target region accurately and morphological processing is used to create a connected domain whose convex hull can cover the target region.In the experiments,the proposed method is demonstrated accurate and robust in localizing target on texture database and practical barcode location system as well.     

建构主义学习观与网络环境下大学生自主学习英语能力的培养

本文以建构主义为理论依据,分析了在以网络信息技术化为背景的大学英语教学改革中培养自主学习英语能力的重要性及其意义。最后结合实践,探索提出了在信息技术环境下进行英语自主学习能力培养白寸教学模式。     

零日攻击的主动防范策略

针对零日攻击的攻击原理分析定时更新补丁、防火墙、入侵检测系统、防病毒软件、UTM网关等传统被动防御方式的不足,建议从网络人口、PC端点进行各个层次的防御,来实现主动防御零日攻击,通过综合使用网关防御、实施分级保护域以及部署主机型人侵防御系统,启发式行为检测反病毒软件等技术及安全管理策略对抗零日攻击,基本达到对零日攻击实现“零日防护”的目的．     

负载型TiO2降解活性艳红X-3B溶液的研究

以钛酸四丁酯、正硅酸乙酯为前驱体,冰醋酸为水解抑制剂,用溶胶-凝胶法制备了纳米TiO2／SiO2复合粒子。考查了SiO2负载量、复合粒子焙烧温度、催化剂用量对活性艳红X-3B光催化降解率的影响。结果表明,当n（Ti）／n（Si）=3,焙烧温度为700℃、粒子添加量w（TiO2）／w（SiO2）=2％时对活性艳红X-3B降解性能最好。