儿童膳食营养知-信-行问卷的编制及信效度评价

目的编制适用于我国儿童的膳食营养知-信-行调查问卷。方法以Pearson相关分析法分析重测信度;采用Cronbach'sα系数评价内部一致性信度;采用单项与总和相关分析评价内容效度;采用因子分析评价结构效度。结果知识、态度、行为各维度和总问卷的重测信度系数分别为0.684、0.792、0.752、0.705,Cronbach'sα系数分别为0.816、0.889、0.981、0.943。内容效度中,除态度2、行为2、行为8、行为10条目外,其他各条目与问卷总分的相关系数均大于0.200;除知识7、行为2、行为8、行为10条目外,其他各条目与所属维度总分的相关系数均大于0.300。因子分析提取了3个公因子,累积方差贡献率为51.21%,56%的条目提取公因子后的共同度超过0.5。结论该问卷具有较好的效度和信度,可为同类研究提供参考。     

构建医学知识服务团队与开展知识管理的相关性

 

高质量的知识服务必须以有效的知识管理作为保障，其中知识工作者是最活跃的因素。组成创造型和智能型的医学知识服务团队，需要在人员专业、知识结构、实际技能等多方面进行合理的搭配，充分发挥知识服务的功能。

     

人工神经网络技术诊断肺心病的实验研究

笔者利用典型的人工神经(BP)网络反向传播模型构建了一个诊断肺心病的专家子系统.结果该专家子系统利用神经网络获取和表示临床有关数据和资料,较好地解决了自动知识的获取、表示、自学等问题,并对临床资料进行量化处理;实例测试表明,该系统有助于肺心病的早期诊断.     

Influence of Varying Tensile Stress on Domain Motion

Magnetic domain motion has been widely studied in the fields of spintronics, nanowires, and thin films. However, there is a lack of such studies on industrial steels, especially for domain motion under the action of varying stress. Understanding domain motion under stress is helpful for the improvement of evaluation accuracy and the establishment of theoretical models of passive, nondestructive testing technology. This paper presents the influence of varying tensile stresses on the magnetic domain motion of silicon steel sheets. Magnetic domain rotation and domain wall displacement were characterized using magnetic domain images, and their motion mechanisms under elastic and plastic stresses are presented. The results show that the domain rotation under stress involves reversible and irreversible changes. The effect of material rearrangement on domain rotation and domain wall displacement after plastic deformation is discussed. Based on the motion mechanism, a threshold stress value (TSV) required for the complete disappearance of the supplementary domains in the elastic range is proposed, enabling the classification of the elastic stress ranges in which the reversible and irreversible domain rotations occur. In addition, the effect of microstructure on TSV is also discussed, and the results show that the regions far away from the grain boundary need larger stresses to complete an irreversible domain rotation. Additionally, the domain width and orientation also affect the TSV. These findings regarding the domain motion mechanism and TSV can help to explain the sequence of domain rotation under stress and modify the stress assessment under dynamic loads in electromagnetic nondestructive evaluation, especially in the magnetic memory method.     

劈状区域中对称双曲组非齐次边值问题的可微分解

适当选取切边算子,引入函数的带边界的模,对文题建立先验估计,证明了高阶可微分解的存在性定理。     

腹部局部解剖学与临床知识相结合的几点体会

把腹部局部解剖学与临床知识相结合，特别是与急腹症和腹部外科手术相结合，可以提高学生的学习兴趣和热情，提高教学质量；也可以为学生下一步学习临床学科及将来的临床工作奠定坚实的基础，架起方便的桥梁.     

1950 — 2001年我国疟疾发病趋势分析

  目的  了解我国居民疟疾防治知识、态度、行为（KAP）相互影响程度。  方法  采取多级分层抽样,于2016年9月 — 2017年3月在广西、安徽、湖北、重庆4个疟疾多发地进行调查。根据疟疾流行的分类标准,将4个省（市）所有疟疾流行县分为1、2、3类县,每一类县抽取3个县共9个县作为样本县;每个样本县随机抽取3个乡镇,共抽取27个乡镇作为样本乡镇;在每个乡镇随机抽取3个村,共81个村作为样本村,随机抽取1358位居民进行入户调查,回收有效问卷1 321,有效率97.3%。问卷内容包括居民家庭条件,个人特征,疟疾防治知识,态度,行为等相关问题,对结果采用KAP量化和多组结构方程模型（SEM）分析。  结果  KAP量化得分上,行为得分最高（0.63 ± 0.25）分,态度（0.61 ± 0.32）分,知识得分最低（0.47 ± 0.22）分;结构方程模型潜在因子之间的总效应上,疟疾知识对行为的总效应为0.4439,疟疾态度对行为的影响效应为0.19,呈“知而趋于行”的特征;不同类别县的知识态度行为相互作用参数差异有统计学意义（P < 0.05）。  结论  我国消除疟疾行动已进入防治疟疾复发阶段,应当加大对偏远地区疟疾防治的卫生宣教,形成良好的态度和行为习惯。     

家兔右室流出道细胞双孔钾通道电流特性的分析研究

目的已知特发性室速主要起源于右室流出道(RVOT),由于技术上的困难,目前对特发性右室流出道室速(RVOT-VT)的离子通道机制研究很少,本实验意在探索右室心室肌(RV)和RVOT的双孔钾通道电流(IK2p)的特性及其在RVOT-VT发生机制中可能参与的作用。方法采用全细胞膜片钳技术记录右室和右室流出道心肌细胞的单细胞电流。结果 RVOT的稳态外向电流较右室的小。对稳态电流进一步研究发现,右室流出道和右室心肌细胞上均存在IK2p。右室流出道细胞的IK2p电流密度明显小于右室细胞。结论首次在电生理水平上,证实了家兔右室心肌细胞上存在IK2p,RVOT心肌细胞的IK2p电流密度小于RV心肌细胞,是构成右室流出道APD离散度增大及外向电流降低的基础,从而易出现EAD,进而促进RVOT-VT的发生。     

The Rationale of Interorganizational Linkages to Connect Multiple Sites of Expertise,Knowledge Production,and Knowledge Transfer

Summary

This paper presents the rationale for a long-running project in which various community-based and tertiary-based providers are being linked to each other in order to understand, reach, and engage high-risk, hard-to-reach inner-city residents for prevention, treatment, and management of HIV/AIDS. Not simply a program to link disparate actors, the work has developed into a more fundamental approach through which to build and maintain the infrastructure required to generate and sustain knowledge development and integration within and between systems. This work is grounded in the recognition that each type of provider, as well as patients and clients themselves, has a particular type of expertise. All forms of expertise are necessary to fight HIV/ AIDS. Different forms of expertise are necessary to diagnose, treat, prevent, and cure HIV/AIDS and its sequelae. This work suggests revisions in traditional approaches to expertise and to the content and geometry of dissemination networks, and ultimately challenges the very concepts of dissemination and the lay/scientific boundary.