普通高校体育教育专业田径课程现状及思考

通过广泛的社会调查，了解到部分普通高校体育教育专业田径课程的现状，对存在的问题进行了分析研究。针对社会对人才的需求，提出了田径课程改革方案，以确保高校体育教育专业人才的培养质量。     

基于工控机自动安装设备驱动的研究

由于工控机设备需要安装驱动程序,而且用传统的方法进行安装,都需要人为地监护整个过程安装,这样就造成了工作效率低,浪费时间。所以研究自动安装设备驱动控制软件来提高工作效率,节约时间。     

Edaravone protects PC12 cells from ischemic-like injury via attenuating the damage to mitochondria

Background： Edaravone had been validated to effectively protect against ischemic injuries. In this study, we investigated the protective effect of edaravone by observing the effects on anti-apoptosis, regulation of Bcl-2/Bax protein expression and recovering from damage to mitochondria after OGD （oxygen-glucose deprivation）-reperfusion. Methods： Viability of PC 12 cells which were injured at different time of OGD injury, was quantified by measuring MTT （2-（4,5-dimethylthia-zol-2-yl）-2,5-diphenyltetrazolium bromide） staining. In addition, PC 12 cells＇ viability was also quantified after their preincubation in different concentration of edaravone for 30 min followed by （OGD）. Furthermore, apoptotic population of PC 12 cells that reinsulted from OGD-reperfusion with or without preincubation with edaravone was determined by flow cytometer analysis, electron microscope and Hoechst/Pl staining. Finally, change of Bcl-2/Bax protein expression was detected by Western blot. Results： （1） The viability of PC12 cells decreased with time （1-12 h） after OGD. We regarded the model of OGD 2 h, then replacing DMEM （Dulbecco＇s Modified Eagle＇s Medium） for another 24 h as an OGD-reperfusion in this research. Furthermore, most PC 12 cells were in the state of apoptosis after OGD-reperfusion. （2） The viability of PC 12 cells preincubated with edaravone at high concentrations （1, 0.1, 0.01 μmol/L） increased significantly with edaravone protecting PC 12 cells from apoptosis after OGD-reperfusion injury. （3） Furthermore, edaravone attenuates the damage of OGD-reperfusion on mitochondria and regulated Bcl-2/Bax protein imbalance expression after OGD-reperfusion. Conclusion： Neuroprotective effects of edaravone on ischemic or other brain injuries may be partly mediated through inhibition of Bcl-2/Bax apoptotic pathways by recovering from the damage of mitochondria.     

神经癌细胞PC12对二甲基亚砜耐受剂量的分析

通过观察不同剂量二甲基亚砜(dimethyl sulfoxide DMSO)作用下PC12细胞形态和生长状态的变化,确定PC12细胞对DMSO的耐受剂量.按照一定浓度梯度(V/V)将DMSO加入培养液干预后的24、48和72 h于倒置相差显微镜下观察AO/EB染色前后细胞的形态特征,同时用四甲基偶氮唑蓝(MTT)显色法检测细胞的生存率和计算半数抑制浓度(50%inhibiting concentration,IC50).结果表明:DMSO浓度为14 mL/L时,24 h内90%的PC12细胞生长正常,形态完整,活力与对照组比较无差别,浓度提高到20 mL/L时,24 h时细胞生存率可下降27%,随着作用时间延长,细胞生存率进一步降低;24、48和72 h对应的IC50值分别为31.4、23.9和19.2 mL/L.因此,对PC12细胞而言,24 h内的应用终浓度应低于14 mL/L,干预时间如需延长,DMSO的应用剂量应相应降低.     

Comparison of Alternative Channels in Cross Media Publishing

This paper attempts a direct comparison of the available alternative channels that can be employed in a cross media publishing scheme. More precisely it examines the content, the publishing speed, and the rhythm of the publishing channels. Interesting conclusions are drawn concerning the characteristics of each channel. A new publishing channel is proposed in order to allow newspapers to directly compete with radio and TV channels.     

用PC机辅助测量声波在空气中的传播速度实验设计

声速测量是普物实验课教学中的一个重要实验，着重介绍将PC机引入声速测量实验的原理、装置、方法、步骤。     

磨削加工的数控与程控

瓦房店轴承厂对现有磨床统一改造为数控或程控磨床。这不仅提高了轴承的加工精度,而且减少了机床电气故障的发生。这里概要介绍了该厂在这方面的工作和“PC”程控器的基本性能及在机床控制上的应用和程序的编制等.并介绍了数控微量进给机构的基本性能、结构及控制,以供参考.     

陶瓷配料计算机监控系统

介绍了基于工业控制计算机的陶瓷配料监控系统的硬件设计和软件设计,该系统经实际应用取得了很好的效果     

桌面PC数据传输瓶颈分析

桌面PC数据传输瓶颈，是造成处理器速度不能发挥，计算机整体性能提高与处理器主频提升不同步等现象的重要原因之一。本文从硬件层面出发，对目前桌面PC中存在的处理器总线与内存总线的数据传输瓶颈、I／O扩展总线的数据传输瓶颈和硬盘的数据传输瓶颈进行分析，并提出现实的处理方法。     

Students' Acceptance of Tablet PCs in the Classroom

In recent years digital technologies, such as tablet personal computers (TPCs), have become an integral part of a school's infrastructure and are seen as a promising way to facilitate students' learning processes. This study empirically tested a theoretical model derived from the technology acceptance model containing key constructs developed in previous research on the acceptance of technological innovations. On the basis of the research model, it was hypothesized that students' acceptance of tablet PCs could be explained by key constructs and could be distinguished in organizational, individual, and technological factors. The survey research was conducted in three German middle schools, involving a total of 120 students. Overall, participants' attitude toward the TPC positively predicted their behavioral intention to use the TPC and as such had the strongest direct influence. The findings emphasize the importance of understanding factors affecting students' attitudes in order to manage and influence the integration of TPCs in schools.