目的探讨多种健康教育形式对武警某部男兵性观念和性知识的教育效果。方法整群选取某支队2个武警中队随机分为综合性教育组和对照组,对照组接受常规教育,综合性教育组还接受视频资料、同伴教育、漫画、健康讲座等多种形式的健康教育。...目的探讨多种健康教育形式对武警某部男兵性观念和性知识的教育效果。方法整群选取某支队2个武警中队随机分为综合性教育组和对照组,对照组接受常规教育,综合性教育组还接受视频资料、同伴教育、漫画、健康讲座等多种形式的健康教育。采用自编的问卷进行调查并进行面对面访谈。结果 (1)教育前,2组仅6.9%认为偶尔手淫对身体无害;教育后,2组差异明显(98.7%vs 9.9%,P<0.01)。(2)教育前,2组79.4%对婚前性行为表示可以或无所谓;教育后,2组差异明显(20.0%vs 78.9%,P<0.01)。(3)综合性教育组教育后问卷得分明显高于教育前(20.7±1.1 vs 10.5±1.7,P<0.01);对照组则无明显差异(12.5±2.0 vs 11.3±2.4,P>0.05)。结论通过视频资料、同伴教育等多种教育形式,对武警某部男兵性观念和性知识能达到比较好的教育效果。展开更多
The geometric structure, electronic structure, optical properties and the formation energy of Sb-doped ZnO with the wurtzite structure are investigated using the first-principles ultra-soft pseudo-potential approach o...The geometric structure, electronic structure, optical properties and the formation energy of Sb-doped ZnO with the wurtzite structure are investigated using the first-principles ultra-soft pseudo-potential approach of plane wave based upon the density functional theory. The calculated results indicate that the volume of ZnO doped with Sb becomes larger, and the doping system yields the lowest formation energy of Sb on the interstitial site and the oxygen site. Furthermore, Sb dopant first occupies the octahedral oxygen sites of the wurtzite structure. It is found that Sb substituting on oxygen site behaves as a deep acceptor and shows the p-type degenerate semiconductor character. After doping, the electron density difference demonstrates the considerable electron charge density redistribution, which induces the effect of Sb-doped ZnO to increase the charge overlap between atoms. The density of states move towards lower energy and the optical band gap is broadened. Our culated results are in agreement with other experimental results and could make more precise monitoring and controlling possible during the growth of ZnO p-type materials.展开更多
Electronic and magnetic properties of V-doped ZnO nanotubes in which one of Zn^2＋ ions is substituted by V^2＋ ions are studied by the first-principles calculations of plane wave ultra-soft pseudo-potential technolog...Electronic and magnetic properties of V-doped ZnO nanotubes in which one of Zn^2＋ ions is substituted by V^2＋ ions are studied by the first-principles calculations of plane wave ultra-soft pseudo-potential technology based on the spin-density function theory. The computational results reveal that spontaneous magnetization in Vdoped （9,0） ZnO nanotubes can be induced without p-type or n-type doping treatment, and the ferromagnetism is isotropic and independent of the chirality and diameter of the nanotubes. It is found that V-doped ZnO nanotubes have large magnetic moments and are ferromagnetic half-metal materials. Moreover, the ferromagnetic coupling among V atoms is generated by O 2p electron spins and V 3d electron spins localized at the exchanging interactions between magnetic transitional metal （TM） impurities. The appearance of ferromagnetism in V-doped ZnO nanotubes gives some reference to fabrication of a transparent ferromagnet which may have a great impact on industrial applications in magneto-optical devices.展开更多
文摘目的探讨多种健康教育形式对武警某部男兵性观念和性知识的教育效果。方法整群选取某支队2个武警中队随机分为综合性教育组和对照组,对照组接受常规教育,综合性教育组还接受视频资料、同伴教育、漫画、健康讲座等多种形式的健康教育。采用自编的问卷进行调查并进行面对面访谈。结果 (1)教育前,2组仅6.9%认为偶尔手淫对身体无害;教育后,2组差异明显(98.7%vs 9.9%,P<0.01)。(2)教育前,2组79.4%对婚前性行为表示可以或无所谓;教育后,2组差异明显(20.0%vs 78.9%,P<0.01)。(3)综合性教育组教育后问卷得分明显高于教育前(20.7±1.1 vs 10.5±1.7,P<0.01);对照组则无明显差异(12.5±2.0 vs 11.3±2.4,P>0.05)。结论通过视频资料、同伴教育等多种教育形式,对武警某部男兵性观念和性知识能达到比较好的教育效果。
基金Supported by the National Natural Science Foundation of Shaanxi Province under Grant Nos 2005F39 and 08jk487.
文摘The geometric structure, electronic structure, optical properties and the formation energy of Sb-doped ZnO with the wurtzite structure are investigated using the first-principles ultra-soft pseudo-potential approach of plane wave based upon the density functional theory. The calculated results indicate that the volume of ZnO doped with Sb becomes larger, and the doping system yields the lowest formation energy of Sb on the interstitial site and the oxygen site. Furthermore, Sb dopant first occupies the octahedral oxygen sites of the wurtzite structure. It is found that Sb substituting on oxygen site behaves as a deep acceptor and shows the p-type degenerate semiconductor character. After doping, the electron density difference demonstrates the considerable electron charge density redistribution, which induces the effect of Sb-doped ZnO to increase the charge overlap between atoms. The density of states move towards lower energy and the optical band gap is broadened. Our culated results are in agreement with other experimental results and could make more precise monitoring and controlling possible during the growth of ZnO p-type materials.
基金Supported by the Natural Science Foundation of Shaanxi Province under Grant No 2005F39, and the Special Foundation of Education Department of Shaanxi Province under Grant No 08jk487
文摘Electronic and magnetic properties of V-doped ZnO nanotubes in which one of Zn^2＋ ions is substituted by V^2＋ ions are studied by the first-principles calculations of plane wave ultra-soft pseudo-potential technology based on the spin-density function theory. The computational results reveal that spontaneous magnetization in Vdoped （9,0） ZnO nanotubes can be induced without p-type or n-type doping treatment, and the ferromagnetism is isotropic and independent of the chirality and diameter of the nanotubes. It is found that V-doped ZnO nanotubes have large magnetic moments and are ferromagnetic half-metal materials. Moreover, the ferromagnetic coupling among V atoms is generated by O 2p electron spins and V 3d electron spins localized at the exchanging interactions between magnetic transitional metal （TM） impurities. The appearance of ferromagnetism in V-doped ZnO nanotubes gives some reference to fabrication of a transparent ferromagnet which may have a great impact on industrial applications in magneto-optical devices.
