Effects of sports on school adaptability, resilience and cell phone addiction tendency of high school students

BACKGROUND Sport help promote healthy physical and mental development of high school students.To date,there have been few studies on the effect of sport on school adaptability,resilience and cell phone addiction tendency of high school students.AIM To explore the effects of sports on school adaptability,resilience and cell phone addiction of high school students.METHODS A stratified random sampling method was used to select 600 students from two high schools in Lhasa,and Physical Activity Rating Scale,School Adjustment Scale for High School Students,Chinese Adolescents Resilience Scale,and Mobile Phone Addiction Index were used for field questionnaire survey.RESULTS Sport was positively correlated with school adaptability and resilience(P<0.01),school adaptability was positively correlated with resilience(P<0.01)and cell phone addiction was negatively correlated with sports,school adaptability and resilience(P<0.01).The direct effect of sport on cell phone addiction was significant(P<0.001),accounting for 20.51%of the total effect.The mediating effect of school adaptability on sport and cell phone addiction was significant(P<0.001),accounting for 17.38%and 35.36%of the total effect value,respectively.School adjustment and resilience had a significant chain-mediated effect on sport and cell phone addiction(P<0.001),accounting for 26.75%of the total effect.CONCLUSION Sport affected the cell phone addiction tendency of senior high school students through the mediating effect of school adaptability and resilience,and through the chain mediation effect of both.

Impacts of cell phone use on driving safety and drivers'perception of risk

In this study, the factors influencing phone-related driving safety and drivers＇ perceptions of cell phone usage were analyzed. A representative sample of more than 500 licensed drivers in Texas who own a cell phone was interviewed based on a well-design questionnaire. Logistic regression model showed that the impact of using cell phone on driving safety varies depending on the characteristics of drivers, such as gender, age, driving experience, and use intensity. Additionally, the results indicated that the strong determinants of phone-related hazard are different from that of phone-related accidents. Regarding the drivers＇ perception of cell phone usage, there are two key findings. First, there is no explicit belief among the drivers about whether cell phone usage impairs driving safety regardless of the drivers＇ age, gender, driving education experience etc. Second, most of drivers have not realized that cell phone use while driving would increase their perception reaction time. Based on the analysis of these results, implications of cell phone use on driving safety along with some safety countermeasures, such as selective bans and non-cell phone zones, are discussed in the paper.

Is Long-Term Cell Phone Use Linked to Breast Cancer? A Review of the Evidence

Cancer of the breast is the second leading cause of cancer death among women worldwide. The majority of cancer of the breast cases (95%) is not hereditary. Can long-term cell phone use be linked to breast cancer? It is unlikely that electromagnetic radiation is involved, but it could possibly be due to the generated heat (cell phones only occasionally transmit when people are not talking on them). Therefore, is there any method or reported statistics that can be used to link the increasing breast cancer incidence with cell phone use and placement? Some young women who placed their mobile devices, including cell phones, in their bra believed that it caused their cancer because it was on the same side and in the same area their phone was adjacent to and came into contact with their skin for prolonged periods. This review highlights what is known about the link between cell phone use, which continues to increase rapidly, and breast cancer explores the association between prolonged exposure to non-ionizing radiation from cell phones and breast cancer. In conclusion, until more data are obtained concerning whether carrying a cell phone is associated with breast cancer, great care should be taken to avoid any potential risks. Strenuous efforts should be made to encourage users of cell phones to follow mobile device manufacturers’ recommendations, and if possible, to avoid skin contact until the potential risks, if there are any, are fully understood.

Cold stamping for AZ31B magnesium alloy sheet of cell phone house

Electric product house of magnesium alloy sheet is usually obtained by warm stamping owing to its poor plasticity and formability at room temperature.The formability of AZ31B magnesium alloy sheet can be improved by repeated unidirectional bending(RUB)process through control of(0002)basal texture.Compared with as-received sheet,the Erichsen value(IE)of the sheet underwent RUB process increases to 5.90 from 3.53 at room temperature.It is also confirmed that cell phone houses could be stamped successfully in crank press with AZ31B magnesium alloy sheets underwent RUB process.It provides an alternative to the electronics industry in the application of magnesium alloys.

Gold Alloy Dental Inlay for Preventing Involuntary Body Movements Caused by Electromagnetic Waves Emitted by a Cell Phone

Cell phone and personal computer use has increased considerably in recent years, particularly in developed countries. These devices have facilitated communication on a global scale. However, there have been a number of reports of health problems related to the electromagnetic waves emitted by such electronic devices. A long list of both general and severe symptoms, including headaches, fatigue, tinnitus, dizziness, memory loss, irregular heartbeat and whole-body skin le-sions, have been reported. These are reportedly associated with the condition known as electro-magnetic hypersensitivity (EHS). This report shows how a subject’s abnormal involuntary body movements, caused by electromagnetic waves emitted by a cell phone, are prevented by placing a gold alloy inlay in the subject’s mouth. It appears that the subject’s involuntary movements are the result of balance dysregulation resulting from EHS. The subject’s various symptoms improve after the specific dental treatment. However, the underlying mechanism of the symptoms and the rea-sons why this treatment is so successful remain unknown. Further research is required to clarify these issues.

A Mathematical Model for Energy Consequences of the Cell Phone Revolution

In the modern tim e,cell phone reduces the cost of important inform a-tion,p lays a cruc ial role in both fac ilitate international and dom estic trades,as well as impacts the effic iency ofm ed ical service.Consider a c ity and estim ate from ava ilab le data the numberH of house-holds,w ith m m embers each,that in the past were serviced by land lines.Now,suppose that som e land lines are rep laced by cell phones.W e model theconsequences of th is change for electric ity utilization in the c ity,during the...

Cell Phone’s Functions on Language Learning

With the time passing by and development of this society,almost everyone has a cell phone,we may see that cell phone as a new fifth medium after computer,having its own characters and advantages,many learners research the communica tive function of cell phone and some from the technological level.This thesis aims at trying to reveal cultural functions of culture,aiming at improve cell phone' s learning and culture functions in a more proper way.

Relationship between using cell phone and the risk of accident with motor vehicles:An analytical cross-sectional study

Purpose Traffic accidents are one of the major health problems in the world,being the first cause of burden of illness and the second leading cause of death in Iran.The Sistan-Baluchestan province is one of the most accidental provinces of Iran with the highest rate of accidents-caused deaths.This study was conducted to determine the risk factors associated with traffic accidents in Zahedan through 2013 to 2016.Methods This analytical cross-sectional study was carried out on 223 drivers from Zahedan who were traumatized by traffic accident and sent to Zahedan hospitals.The data were obtained through interviews taken by the trained interviewers via refereeing to the medical records and collected in the researcher-made checklist.Census was obtained from the study subjects.For data analysis,independent t-test,one-way ANOVA,Chi-square and logistic regression were used with the Stata software version 11.0.Results In this study,223 male subjects with the mean age of(32.54±12.95)years,39.8%single and 60.2%married,entered for investigation.Most accidents(38.8%)occurred between 12:00 to 17:59.While driving,47.1%of the study subjects were using cell phones,89.1%had manual use of mobile phones,21.9%had a habit of sending short message service(SMS)and 23.4%had sent SMS within 10 min before the accident.The one way analysis of variance showed that the mean age of individuals with marital status,driving experience,education and accident with motorcycle were significantly different(p<0.05).Also,the multivariate logistic regression test indicated a significant relationship of smoking,ethnicity,insurance and SMS typing while driving with motorcycle accident(p<0.05).Conclusion In this study,SMS and smoking while driving had the highest risk among the variables studied in the motorcycle accidents.Therefore,effective education attempting to enhance people's awareness about the consequences of using cell phone and smoking during driving to reduce traffic accidents seems necessary.

基于手机信令数据的城市居民动态OD矩阵提取方法

现有的城市居民出行调查周期较长,交通小区划分粒度粗糙,导致调查不能及时准确地获取居民出行信息。针对该问题,提出了一种基于手机信令数据的城市居民动态OD矩阵提取方法。首先,针对信令数据中的两种复杂噪声:乒乓切换和漂移数据,提出了基于窗口阈值的检测与等效位置替换方法,以及复杂漂移点的检测和标记处理方法;然后,提出一种改进的ST-DBSCAN聚类方法,引入一种等时化方法将时间信息与空间信息相结合,识别出行过程中的驻留点;最后,基于地理信息系统构建含有道路关键节点的路网,将居民出行OD与路网节点相匹配,有效推导出城市居民动态OD矩阵。实验结果表明:与ST-DBSCAN算法相比,所提改进的ST-DBSCAN算法在聚类效果和识别速度上分别提升了6.10%和5.26%;与统计方法和二阶统计量方法相比,基于改进的ST-DBSCAN算法的动态OD矩阵提取方法在均方误差(MSE)上分别降低了16.98%和21.55%。以北京市为例,运用提出的动态OD矩阵提取方法,能够及时有效地分析城市居民日常与高峰时段的出行特征。

手机镜头马达整盘夹具加工教学设计与实践

选取手机镜头马达夹具作为载体,完成了手机镜头马达夹具的三维建模,确定了基于UG NX软件的加工策略,生成加工轨迹,并解决手机镜头马达夹具的加工难点。经过仿真加工后,后置处理程序准确无误,可以在机床上实际加工。经过数控加工工艺参数优化,该加工工艺方案清晰合理,通过在精雕机床完成手机镜头马达夹具五面加工,加工结果满足使用要求。

SmartPhone类手机应用开发框架研究

通过对SmartPhone类型手机的研究与消息机制的分析,最终创建起较为通用高效的开发框架,对于后继软件开发建立了良好的开发平台.

基于手机信令数据的上海五个新城独立性动态特征与趋势研究

“独立的综合性节点城市”是上海“十四五”对五个新城发展的战略性定位和重要要求之一。基于2014年、2020年的两期手机信令数据,从通勤活动和生活活动两个方面测度了上海五个新城的“独立性”及其发展趋势。研究发现,虽然五个新城职住规模较为均衡,但实际“独立性”存在弱化趋势,部分新城向中心城通勤和生活出行的比例高达20%以上,“卧城”特征十分明显;五个新城对周边地区就业和活动的吸引力正在不断增强,但对中心城的“反磁力作用”始终较弱。轨道交通可能大大强化了新城的“卧城”作用,但并没有促进新城的“反磁力”作用。上海五个新城仍处在由依赖中心城区的半独立卫星城向自我平衡的独立新城转变的阶段,其“独立性”仍有较大优化空间。

医学生父母冲突感知和手机成瘾:社交回避及苦恼的中介作用

目的:探讨医学生父母冲突感知与手机成瘾的关系及社交回避及苦恼的中介作用。方法:采用感知父母冲突量表、大学生智能手机成瘾量表和社交回避及苦恼量表对334名医学生进行问卷调查。结果:①父母冲突感知对医学生手机成瘾的总效应显著,且能够直接正向预测手机成瘾(r=0.461,P<0.001);父母冲突感知能够正向预测社交回避及苦恼(r=0.254,P<0.001),社交回避及苦恼能够正向预测医学生手机成瘾(r=0.115,P<0.05)。②社交回避及苦恼在父母冲突感知与医学生手机成瘾之间起部分中介作用。结论:父母冲突感知与医学生手机成瘾具有密切关联,社交回避及苦恼在该联系中起到一定作用。个体父母冲突感知水平越高,情绪敏感性越高,人际关系安全感和情绪调节能力则越低,导致个体产生社交回避及苦恼的可能性越大。个体社交回避及苦恼水平越高,则越容易沉浸在网络社交中,增加手机成瘾的倾向。

杭州地铁通勤客流特征研究

为解决城市就业与居住空间失衡的问题,文章深入研究城市轨道交通乘客出行的时空特征。研究基于中国移动手机信令数据,分析杭州市职住人口空间分布和地铁通勤数据在职住空间匹配程度下的时空特点。研究过程中,静态特征依托职住平衡、空间错位和就业-居住偏离三大指数,得出杭州市就业人口和居住人口在空间分布上具有一致性,同时工作人口相对于居住人口呈现出更为聚集的现象,在一定程度上揭示杭州市多中心化的空间结构特点。动态联系依托杭州市轨道交通乘客的出行特征,包括出行距离、出行时间等。结果显示,城市轨道交通在长距离通勤方面具有显著优势,同时城市轨道交通的通勤吸引范围大约为1 km,步行作为主要的接驳方式。通过对静态特征和动态联系的深入研究,得出杭州市职住空间匹配合理程度以及地铁通勤时空特征的初步结论,为未来城市规划和交通发展提供重要依据。

基于SEM的体育锻炼影响手机成瘾的机制分析

目的探讨体育锻炼影响手机成瘾的内在机制,并构建2者之间的模型。为实践干预手机成瘾行为提供理论参考。方法通过便利抽样,采用体育锻炼等级量表、自我控制量表、人际关系困扰量表、手机成瘾倾向量表、领悟社会支持量表,对扬州市某高校588名在校大学生(年龄:M=19.24岁,SD=1.20)进行调查。结果大学生的体育锻炼量、自我控制、人际关系困扰、手机成瘾倾向和领悟社会支持均两两相关(p<0.01);体育锻炼可以直接预测大学生的手机成瘾行为(β=-0.15,95%CI[-0.28,-0.01]),自我控制(β=-0.07,95%CI[-0.14,-0.02])和人际关系困扰(β=-0.03,95%CI[-0.06,-0.01])分别起到部分中介作用。并且社会支持既可以调节身体活动影响手机成瘾的直接过程(β=-0.15,p<0.001),也可以调节由人际关系介导的前半部分路径(β=-0.09,p<0.05)。结论自我控制、人际关系困扰在大学生体育锻炼与手机成瘾之间起部分中介作用,并且社会支持水平对这一过程有显著的调节作用。

Windows Phone 7智能手机的取证

作为新兴的智能手机,Windows Phone手机呈稳步发展趋势,并越来越受到人们的关注。在介绍了Windows Phone 7手机的系统架构和安全模型后,就取证遇到的问题详细地描述了取证方式,探讨了如何对Windows Phone 7智能手机进行取证。通过使用原生级方法和Windows Phone SDK访问Window Phone 7内核和其他数据来获得手机的有价值信息,同时通过一系列工具来分析手机上的文件。结果表明,能够从Windows Phone 7手机中有效寻找到短信、电子邮件、社交活动等证据资料。

基于手机加速度传感器的高精度计步器设计

随着人们对手机计步功能的需求越来越高,采用传统计步器已无法满足实际需求。为满足某些情境下对精确计步的需要,设计一个基于Android 6.0系统的高精度计步器软件。该软件的功能较为简洁,除基本的计步控制之外,设计了基于选项卡的配套界面。实验结果表明,该计步器软件的计步精度较高,抗干扰能力强,可以满足高精度计步的任务需求。

手机电磁辐射对耳蜗超微结构及边缘细胞的影响

目的探讨900MHz手机电磁辐射对大鼠耳蜗超微结构及边缘细胞的影响。方法选择成年SD大鼠40只,通过每日接受不同时长900MHz手机电磁辐射暴露28d建立手机电磁辐射大鼠模型,分为对照组、辐射6 h组、辐射12 h组和辐射24 h组。电磁辐射暴露后,测试大鼠的听性脑干反应(ABR)、40 Hz听觉事件相关电位和听觉稳态反应的反应阈以评价电磁辐射对大鼠听觉功能的影响;扫描电镜及苏木精-伊红染色后光镜下观察耳蜗超微结构;彗星实验检测耳蜗边缘细胞DNA损伤情况;流式细胞仪检测电磁辐射对边缘细胞凋亡的影响及活性氧水平。结果手机电磁辐射后大鼠听觉功能各指标反应阈值均高于对照组(P值均<0.05);大鼠耳蜗超微结构随每日暴露时长增加而出现不同程度的外毛细胞纤毛排列及结构异常、柯蒂器形态改变和耳蜗内红细胞渗出等;大鼠耳蜗边缘细胞的DNA损伤情况及细胞凋亡率在各组间差异无统计学意义(P>0.05);辐射24 h组的活性氧水平显著高于对照组(P<0.001),其余组与对照组间差异无统计学意义(P值均>0.05)。结论长时间手机电磁辐射可引起大鼠耳蜗超微结构损伤,并导致听觉功能下降,但不足以引起耳蜗边缘细胞的DNA损伤和凋亡,更长时间的辐射暴露会引起活性氧水平升高。

深圳市建成环境因素对居民通勤效率的影响——基于手机信令数据的分析

通勤效率是反映城市生活品质的重要指标。改革开放以来,经济社会快速发展和城镇化水平不断提高,城市职住空间关系发生深刻变化和居民通勤行为变得日趋复杂,影响城市空间绩效和居民生活品质;且随着多源大数据可获得性增强,关于职住平衡及其对通勤效率作用机制的研究愈发广泛而深入,但学者对于职住平衡度和土地利用混合度等物质空间属性如何影响居民通勤尚未达成一致的结论。为了解城市日常生活中不同通勤效率居民的多元需求和真实的通勤状态,探索提升城市居民通勤效率的有效途径,推动城市人居环境高质量发展。以深圳市为例,借助DAAS和ArcGIS平台利用联通手机信令数据识别居住地和工作地,通过LINGO软件计算过剩通勤指标,对深圳居民通勤效率进行评价,并在区分居民工作地和居住地基础上建立多元回归模型,探究多方面因素对居民通勤效率的影响和作用机制。研究发现,区位、职住平衡度、土地利用混合度、容积率、平均房价、公交可达性、城中村面积、工作岗位数量和服务设施面积对居民通勤效率有重要的影响。控制其他因素对通勤效率的影响之后,无论是居住地还是工作地,通勤效率都会随着职住平衡程度的提升而提高,而在中国已有较高密度和混合度的背景下,通过进一步增容或功能混合以期提高通勤效率的措施则需审慎对待。研究丰富了基于我国大中城市背景的通勤影响实证案例,为提高城市通勤效率,推动可持续交通提供有益的政策参考。

等待阶段使用手机对行人过街风险的影响

为揭示等待阶段使用手机对行人过街风险的影响,本文选取典型信控人行横道进行数据采集,追踪行人过街过程。利用随机森林算法建立行人违章分类模型,提取过街风险表征参数,基于CRITIC(Criteria Importance Through Intercriteria Correlation)权重法构建行人过街风险评估模型。研究表明:行人过街等待时间、位置选择、绿灯反应时间、启动速度、平均速度及目标速度未达成率对过街违章有重要影响;等待阶段使用手机对位置选择影响较小,但会导致行人反应变慢,平均速度降低,行人启动速度及目标速度未达成率升高;目标速度未达成率、过街位置选择及绿灯反应时间对过街风险影响较大,使用手机群体过街风险相对正常过街行人增大了26.1%。研究结果可为过街设施的优化与完善,行人安全教育手段的丰富与提升等提供重要参考。