体育锻炼的选择对治疗焦虑的影响   总被引：4，自引：0，他引：4  

张利  张昆 《湖北体育科技》2005,24(1):67-68

焦虑是一种常见的不良情绪体验 ,通过体育锻炼可以达到对焦虑的治疗作用。体育锻炼的各种特征 ,如活动类型、强度、持续时间等都会对焦虑的治疗效应产生重要影响。因此 ,必须具体问题具体分析 ,因人而异 ,不同的人选择不同的锻炼方法 ,才有可能使体育锻炼治疗焦虑取得最大的效果。  相似文献   

Consolidation of Black-dyed Māori Textile Artefacts: Evaluating the Efficacy of Sodium Alginate     

Catherine A. Smith  Rachel A. Paterson  Bronwyn J. Lowe  Rangi Te Kanawa 《文物保护研究》2018,63(3):139-154

Black-dyed artefacts are found in museums worldwide, many produced using an iron-tannate compound. Deterioration of iron-tannate dyed artefacts is an international preservation issue: in New Zealand the deterioration of paru (iron-tannate) dyed Māori textiles is widespread. This article reports experimental work testing the efficacy of sodium alginate, a consolidant developed for deteriorated paru-dyed muka (fibre from harakeke; Phormium tenax). The colour stability, strength retention, and acidity of paru-dyed muka consolidated with sodium alginate (0.25, 0.5, and 1% w/v in water) was tested pre- and post-artificial light ageing. This study found that sodium alginate had no negative effect on paru-dyed muka and in some cases provided benefit. Interestingly, the colour of paru-dyed muka is substantially more stable in UV-filtered light than previously recognised. Also microfading results were in agreement with visual assessments of colour change at 1 Mlux hour exposure, providing confidence in this relatively new technique to assess colour change.  相似文献   

Seeking Nettle Textiles – Utilizing a Combination of Microscopic Methods for Fibre Identification     

Jenni A. Suomela  Krista Vajanto  Riikka Räisänen 《文物保护研究》2018,63(7):412-422

Bast fibres have been commonly used as a textile material in Northern Europe since Neolithic times. However, the process of identifying the different species has been problematic, and many important questions related to their cultural history are still unanswered. For example, a modified Herzog test and the presence of calcium oxalate crystals have both been used in identification. In order to generate more reliable results, further research and advancement in multi-methodological methods is required. This paper introduces a combination of methods which can be used to identify and distinguish flax (Linum usitatissimum), hemp (Cannabis sativa), and stinging nettle (Urtica dioica). The research material consisted of reference fibres and 25 fibre samples obtained from 12 textiles assumed to be made of nettle. The textiles were from the Finno-Ugric and Historical Collections of The National Museum of Finland. The fibre samples were studied by observing the surface characteristics and cross sections with transmitted light microscopy, and by using a modified Herzog test with polarized light, in order to identify the distinguishable features in their morphological structures. The study showed that five out of 25 samples were cotton, 16 nettle, one flax, and one hemp. Findings from two samples were inconsistent. The results show that it is possible to distinguish common north European bast fibres from each other by using a combination of microscopic methods. Furthermore, by utilizing these combined methods, new and more reliable information could be obtained from historical ethnographic textiles, which creates new vistas for the interpretation of their cultural history.  相似文献   

Virtual Microscopy as a Learning Tool in Brazilian Medical Education     

Fernanda Somera dos Santos  Mariana Kiomy Osako  Gleici da Silva Castro Perdoná  Márcia Gaião Alves  Katiuchia Uzzun Sales 《Anatomical sciences education》2021,14(4):408-416

Virtual microscopy (VM) is a widely used teaching method in Medical Education in many developed countries. In Brazil, however, this is not the case for most medical schools, considering Brazilian social inequality and uneven access to technology. Recently, the Covid-19 pandemic has also challenged Universities to seek and make a transition toward more effective methods of full-time online education. Thus, the main goal of this work was to verify student's perception and academic performance, assessed upon VM implementation in a Brazilian Medical School. Ribeirao Preto Medical School students answered a 26-question survey with regards to optical microscopy (OM) and VM. Academic performance was compared between participants that were (year of 2019) or were not (year of 2015) exposed to VM. Taken the results together, subjective impressions such as handling, suitability, learning effectiveness, and pleasure using the tools, have shown a higher score for virtual microscopy (median = 29), when compared to optical microscopy (median = 24) with a P-value < 0.001 by Wilcoxon rank test, upon measurement using an ordinal scale. Regarding academic performance, no statistically significant differences were found between groups (P-value = 0.38, Cohen's d = 0.19). Therefore, VM proved to be adequate to the Brazilian medical education in light of Brazilian social contexts and Covid-19 pandemic.  相似文献   

基于微博数据的中原城市群空间联系强度测度   总被引：1，自引：0，他引：1  

王开泳  邓羽 《中国科学院大学学报》2016,33(6):775-782

空间联系强度是城市群发展阶段、态势、功能定位的重要表征.在大数据背景下，随着移动终端的普及和网络联系平台的广泛使用，人流在不同地区的空间移动能够得到较准确的统计和表达.在总结以往城市群空间联系研究方法的基础上，提出一种新的基于微博数据判别城市之间空间联系强度的方法，弥补了由于缺乏城际通勤数据而导致的传统空间联系强度判别方法的不足.新方法可以较准确地判别城市群地区各个城市的空间联系强度与组织类型.  相似文献   

发菜分布区生态特征分析   总被引：1，自引：0，他引：1  

黄健 《青岛职业技术学院学报》2005,18(1):62-64

根据文献资料和作者多年的研究,对发菜产地的自然环境,例如风、湿度、光线、温度和土壤等地貌特征,进行了综述。分析比较了藻体在休眠期和生长期中,各生态因素的主要不同点,并对微小生物环境对生长的影响做了剖析。最后,阐述了发菜的节律性生长与各生态因素的节律性变化的关系。  相似文献   

Influence of moderate intensity physical activity levels and gender on conditioned pain modulation     

Masataka Umeda  Wanseok Lee  Courtney A. Marino  Shelby C. Hilliard 《Journal of sports sciences》2016,34(5):467-476

This study examined the potential influence of moderate intensity physical activity (PA) levels and gender on central pain modulation using conditioned pain modulation (CPM) in healthy men and women. Twenty four individuals (12 men and 12 women) who reported engaging in the moderate intensity PA for 150 min or more per week and 24 individuals (12 men and 12 women) who reported engaging in moderate intensity PA for 60 min or less per week completed a self-report PA questionnaire and a 7-day PA assessment using an accelerometer. Furthermore, the participants completed the CPM testing to evaluate the efficiency of central pain modulation. The active individuals scored higher on the PA questionnaire and spent more minutes for light, lifestyle, moderate and vigorous intensity PA than the less active individuals. The active men and women exhibited comparable magnitudes of CPM, and showed a greater magnitude of CPM when compared to their less active counterparts. However, these beneficial effects of higher dose moderate intensity PA disappeared when time spent for vigorous intensity PA was statistically controlled for. These results suggest that the higher dose moderate intensity PA does not add to the benefits from vigorous intensity PA to further improve central pain modulatory systems.  相似文献   

Sex-specific associations of moderate and vigorous physical activity with physical fitness in adolescents     

T. Kidokoro  H. Tanaka  K. Naoi  K. Ueno  T. Yanaoka  K. Kashiwabara 《European Journal of Sport Science》2016,16(8):1159-1166

The present study examined the sex-specific associations of moderate and vigorous physical activity (VPA) with physical fitness in 300 Japanese adolescents aged 12–14 years. Participants were asked to wear an accelerometer to evaluate physical activity (PA) levels of various intensities (i.e. moderate PA (MPA), 3–5.9 metabolic equivalents (METs); VPA, ≥6 METs; moderate to vigorous PA (MVPA), ≥3 METs). Eight fitness items were assessed (grip strength, bent-leg sit-up, sit-and-reach, side step, 50?m sprint, standing long jump, handball throw, and distance running) as part of the Japanese standardised fitness test. A fitness composite score was calculated using Japanese fitness norms, and participants were categorised according to their score from category A (most fit) to category E (least fit), with participants in categories D and E defined as having low fitness. It was found that for boys, accumulating more than 80.7?min/day of MVPA may reduce the probability of low fitness (odds ratio (ORs) [95% confidence interval (CI)]?=?0.17 [0.06–0.47], p?=?.001). For girls, accumulating only 8.4?min of VPA could reduce the likelihood of exhibiting low fitness (ORs [95% CI]?=?0.23 [0.05–0.89], p?=?.032). These results reveal that there are sex-specific differences in the relationship between PA and physical fitness in adolescents, suggesting that sex-specific PA recommendation may be needed to improve physical fitness in adolescents.  相似文献   

静电场环路定理在静电场中的地位及应用     

孟彩荣 《忻州师范学院学报》2004,20(2):79-81

文章从静电场力作功的特点出发，说明静电场是保守力场。然后通过与高斯定理比较，阐述了静电场环路定理在静电场中的地位。并通过两个典型例子说明静电场环路定理的应用。  相似文献   

也谈《世说新语》何以不收陶渊明     

蒲日材 《天中学刊》2007,22(3):55-57,62

《世说新语》何以不收陶渊明?宁稼雨教授认为主要是陶氏家族在东晋没有取得世家大族的地位和声望所致。王建国博士商榷说一是与《世说新语》的收录旨趣有关,二是陶渊明那时的地位和影响远非我们现在所想象的那么重要。细较二人研究成果,究其原因主要是陶渊明不是清谈之士,其次还有家世衰微破落、文风平淡等,在当时没有产生广泛的影响和足够的声誉所致。  相似文献