数字环境下城乡青年健康信息搜寻行为研究

[目的/意义] 从信息行为视角阐释城乡青年在健康信息领域的表征与原由,为相关管理部门制定政策与措施、医疗与网站等健康服务教育机构提升健康信息服务提供参考。[方法/过程] 采用半结构化访谈收集24位20-29岁河南省城乡青年的健康信息搜寻行为数据,考察数字环境下城乡青年健康信息需求动机、信息搜寻行为特点及异同,借助Nvivo对数据进行整理、编码和内容分析。从网络获取方式、手机与电脑使用体验差异、健康信息需求类别、搜寻途径、检索方式及平台选择等方面对城乡青年健康信息搜寻行为的共性与差异予以分析。[结果/结论] 与农村青年相比,城市青年健康信息需求范围更广泛、检索策略与平台选择多样化。论文提出城乡青年间“数字鸿沟”的存在可能引发“健康信息鸿沟”的风险,根源在于收入水平、受教育程度、信息技术使用能力等因素直接影响数字环境下网络接入、使用及信息化水平。     

输水渠道横断面设计水深测试及计算(综合性)实验

输水渠道横断面设计水深测试及计算实验结合“灌溉排水工程学”及“水力学”等学科的知识,在实验过程中,通过对实验数据的测试、分析及计算和渠道模型实物的观摩,加深了对渠道设计原理的理解,与课堂上的理论教学起到了良好的互动作用。     

依法治国的政治环境三题:构成、影响与优化

依法治国是我们党的治国方略。要使依法治国有效地进行,一是国有“良法”;二是要有与之相适应的政治环境。我们的要不断提升政治主体素质,改革不适应法治环境的政治体制。按照“三个代表”的要求,加强和改善党的领导,规范政府行为,从而推动依法治国战略的实现。     

提高高校计算机理论课教学质量的分析与探讨

计算机本身的特点决定了计算机理论课的教学在教育方面具有得天独厚的优势,那么在其教学中应该以提高学生的学习主动性和创造性为目的。因此,在教育目的和教学目标、教学内容、教师、学生以及教学环境条件等方面要体现出来,并从理论与实践上进行一些探讨。     

Reliability of arterial spin labelling measurements of perfusion within the quadriceps during steady-state exercise

Arterial spin labelling (ASL) provides a potential method to non-invasively determine muscle blood flow and examine the impact of interventions such as supplementation and training. However, it's a method with intrinsically low signal, leading to limitations in accuracy and temporal resolution. To examine these limitations, the current study measured perfusion via ASL on three occasions in the rectus femoris of 10 healthy adults, during light and moderate exercise, over three different exercise durations. For data sampled over 9 min, light intensity exercise gave an average perfusion of 35.0 ± 5.1 ml/min.100g^?1 with a coefficient of variation (COV) of 16% and single intraclass correlation coefficient (ICC) of 0.67. For the moderate bout, perfusion was 51.3 ± 5.6 ml/min.100g^?1 (COV 10%, ICC 0.82). When the same data were analyzed over 5 min 24 s, perfusion was 37.8 ± 11.13 (COV 30%, ICC 0.13) during light and 49.5 ± 8.8 ml/min.100g^?1 (COV 18%, ICC 0.52) during moderate exercise. When sampling was reduced to 1 min 48 s, perfusion was 41.2 ± 13.7 (COV 33%, ICC 0.26) during light and 49.5 ± 13.6 ml/min.100g^?1 (COV 28%, ICC 0.04) during moderate exercise. For 9 min a significant perfusion difference was found between the exercise intensities; however, this was not the case for sampling over 5 min 24 s or 1 min 48 s. Such findings illustrate the potential of ASL to non-invasively monitor muscle perfusion under steady-state conditions, but highlight that extended exercise protocols are necessary in order to generate date of sufficient reliability to be able to discriminate intervention dependent perfusion differences.     

英语教学中如何有效地培养学生的语感

在科技迅速发展的21世纪,英语作为一种在信息交流方面广泛运用的语言工具,越来越受到人们的重视。学习者都期盼有一种速成法在短时间内能将英语水平有大幅度的提高。学语言应该找到感觉,也就是说,要培养语感。     

网络环境下高校爱国主义教育面临的挑战与对策

以计算机、通讯和信息技术为支撑的网络的快速发展,对当今社会的影响深远,也使高校爱国主义教育面临机遇与挑战.高校应当根据网络的特点,因势利导,趋利弊害,采取相应的对策充实爱国主义教育的内容,改进教学方式和教学手段,提高爱国主义教育的成效.     

The effect of 14 weeks of vitamin D3 supplementation on antimicrobial peptides and proteins in athletes

Heavy training is associated with increased respiratory infection risk and antimicrobial proteins are important in defence against oral and respiratory tract infections. We examined the effect of 14 weeks of vitamin D₃ supplementation (5000 IU/day) on the resting plasma cathelicidin concentration and the salivary secretion rates of secretory immunoglobulin A (SIgA), cathelicidin, lactoferrin and lysozyme in athletes during a winter training period. Blood and saliva were obtained at the start of the study from 39 healthy men who were randomly allocated to vitamin D₃ supplement or placebo. Blood samples were also collected at the end of the study; saliva samples were collected after 7 and 14 weeks. Plasma total 25(OH)D concentration increased by 130% in the vitamin D₃ group and decreased by 43% in the placebo group (both P = 0.001). The percentage change of plasma cathelicidin concentration in the vitamin D₃ group was higher than in the placebo group (P = 0.025). Only in the vitamin D₃ group, the saliva SIgA and cathelicidin secretion rates increased over time (both P = 0.03). A daily 5000 IU vitamin D₃ supplement has a beneficial effect in up-regulating the expression of SIgA and cathelicidin in athletes during a winter training period, which could improve resistance to respiratory infections.     

多媒体环境下大学英语教学模式探究

文章通过对现有大学英语教学模式的思考,结合外语教学特点,从多媒体视角探究了多元化英语教学模式(即立体信息输入式、自我驱动模式、电子交互模式、文化意识培养模式),以期为大学英语教学实践提供新的思路和视角。     

人与自然关系的主体原因探析

人作为主体,在人与自然关系中起着至关重要的作用。人口因素对自然环境的影响,主要 包括人口数量因素对自然环境的影响和人口质量因素对自然环境的影响。要改善人对自然环境的影 响,必须从人的自身去寻找对策,变不利因素为有利因素,实现人与自然的和谐统一。