Is Peer Victimization Associated with Higher Online Trolling among Adolescents?The Mediation of Hostile Attribution Bias and the Moderation of Trait Mindfulness

Background:In recent years,online trolling has garnered significant attention due to its detrimental effects on mental health and social well-being.The current study examined the influence of peer victimization on adolescent online trolling behavior,proposing that hostile attribution bias mediated this relationship and that trait mindfulness moderated both the direct and indirect effects.Methods:A total of 833 Chinese adolescents completed the measurements of peer victimization,hostile attribution bias,trait mindfulness,and online trolling.Moderated mediation analysis was performed to examine the relationships between these variables.Results:After controlling for gender and residential address,the study found a significant positive correlation between peer victimization and online trolling,with hostile attribution bias serving as a mediator.In addition,trait mindfulness moderated the direct relationship between peer victimization and online trolling.Specifically,the effect of peer victimization on online trolling was attenuated when adolescents had high levels of trait mindfulness.The results of the study emphasized the joint role of peer and personal factors in adolescents’online trolling behavior and provide certain strategies for intervening in adolescents’online trolling behavior.Conclusion:The results of the study suggest that strategies focusing on peer support and mindfulness training can have a positive impact on reducing online trolling behavior,promoting adolescents’mental health,and their long-term development.

Data Scale, Data Scope and Platform Enterprise Performance: Insights from Digital Platform M&As

Data is a key asset for digital platforms,and mergers and acquisitions(M&As)are an important way for platform enterprises to acquire it.The types of data obtained from intra-industry and cross-sector M&As differ,as does the extent to which they interact within or between platforms.The impact of such data on corporate market performance is an important question to consider when selecting strategies for digital platform M&As.Based on our research on advertising-driven platforms,we developed a two-stage Hotelling game model for comparing the market performance effects of intra-industry M&As and cross-sector M&As for digital platforms.We carried out an empirical test using relevant data from advertising-driven digital platforms between 2009 and 2021,as well as a case study on Baidu’s M&A activities.Our research discovered that intra-industry M&As driven by“data economies of scale”and cross-sector M&As driven by“data economies of scope”are both beneficial to the market performance of platform enterprises.Intra-industry M&As have a more significant positive effect on the market performance of platform enterprises because the same types of data are easier to integrate and develop the“network effect of data scale”.From a data factor perspective,this paper reveals the inherent economic logic by which different types of M&As influence the market performance of digital platforms,as well as policymaking recommendations for all digital platforms to select M&A strategies based on data scale,data scope,and the network effect of data.

Safety and Efficacy of Endovascular Aortic Repair for Abdominal Aortic Aneurysms with a Hostile Neck Anatomy

Objective This study aimed to investigate the safety and efficacy of endovascular aortic repair(EVAR)for the treatment of an abdominal aortic aneurysm(AAA)with a hostile neck anatomy(HNA).Methods From January 1,2015 to December 31,2019,a total of 259 patients diagnosed with an AAA who underwent EVAR were recruited into this study.Based on the morphological characteristics of the proximal neck anatomy,the patients were divided into the HNA group and the friendly neck anatomy(FNA)group.The patients were followed up for up to 4 years.Results The average follow-up time was 1056.1±535.5 days.Type I endoleak occurred in 4 patients in the HNA group,and 2 patients in the FNA group.Neither death nor intraoperative switch to open repair occurred in either group.The time of the operation was significantly longer in the HNA group(FNA vs.HNA,99.2±51.1 min vs.117.5±63.8 min,P=0.011).There were no significant differences in short-term clinical success rate(P=0.228)or midterm clinical success rate(P=0.889)between the two groups.The overall mortality rate was 10.4%,and Kaplan-Meier survival analysis indicated that the two groups had similar cumulative survival rates at the end of the follow-up period(P=0.889).Conclusion EVAR was feasible and safe in patients with an AAA with a proximal HNA.The early and midterm results were promising;however,further studies are needed to verify the long-term effectiveness of EVAR.

风险投资的退出绩效研究——IPO与M&A的比较

风险投资的成功必须依赖于良好的退出机制,风险投资理论的发展和风险资本市场的完善使得风险投资退出机制的创新成为必然趋势,从而为风险投资的退出提供了更多的路径选择。从目前各国风险投资的发展状况来看,首次公开发行(IPO)和企业并购(M&A)已经成为风险投资最主要的两种退出方式。本文以上述两种方式的比较为主线,试图对风险投资的退出绩效问题进行较为全面和深入的研究。

AM/DMAM/AMPS共聚物的合成及结构分析

用引发聚合方法合成了ＡＭ／ＤＭＡＭ／ＡＭＰＳ三元共聚物。研究结果表明，在单体总浓度１０％—２０％、引发剂浓度０．０３％—０．０５％、ｐＨ值为中性时，在５０—６０℃反应４—６小时可以得到转化率９２％—９９％、特性粘数６００—９００ｍｌ／ｇ的无规共聚物。通过元素分析、红外光谱等研究了共聚物的分子结构。

AM/DMAM/AMPS共聚物溶液的粘度性能

研究了ＡＭ／ＤＭＡＭ／ＡＭＰＳ共聚物去离子水溶液和盐水溶液的粘度性能。结果表明金属阳离子对共聚物水溶液粘度的影响甚大，共聚单体ＡＭＰＳ引入的阴离子是造成共聚物盐敏性的原因。在ＡＭＰＳ和ＤＭＡＭ共同影响下，共聚物获得了良好的耐温、抗老化性能，共聚物浓度２０００ｍｇ／ｌ、矿化度１×１０５ｍｇ／ｌ的共聚物盐水溶液在９０℃老化６０天后，粘度仍大于３．０ｍＰａ·ｓ。

EOR用AM-MA-VP共聚物的合成及性能研究

本文以丙烯酰胺(AM)、顺丁烯二酸(MA)、N-乙烯基-2-吡咯烷酮(VP)为单体,以水作溶剂合成了AM-MA-VP三元共聚物。研究了影响共聚反应的主要因素以及共聚物的耐温、抗盐等性能,通过IR、NMR、TG、DTA、DSC研究了共聚物的结构和热性能。研究结果表明:该共聚物增粘效果好,耐温、抗盐,抗剪切性能较好。

高温高盐油藏调驱用低浓度AM三元共聚物/复合醛交联体系

实验研究了低浓度AMPS/AM/AMC14 S三元共聚物 /复合醛体系的组成和弱凝胶形成条件。由共聚物 30 0—5 0 0mg/L ,改进的复合醛交联剂 30 0— 5 0 0mg/L、热稳定剂 2 0 0mg/L在高矿化度 (1.6× 10 5mg/L)、高钙镁离子(35 0 0mg/L)油田采出水中配成的溶液 ,在 70— 95℃ ,pH值 5 .0— 8.0条件下可形成弱凝胶 ,在 90℃热老化 180天后保有的粘度值在 30— 35

胜利油田污水配制梳形抗盐聚合物KYPAM驱油试验初步结果

在原始油层温度 80℃、原始地层水矿化度 2 10 0 0mg/L的胜利胜坨一区开展了梳形抗盐聚合物KYPAM和超高分子量HPAMMO 4 0 0 0对比驱油试验。KYPAM试验区面积 1.6 3km2 ,油层厚 12m ,注聚井 10口 ,井距 30 0m ,油井 16口 ,含水 97.2 % ,设计分 3个段塞注入浓度 180 0～ 10 0 0mg/L的KYPAM污水 (矿化度 12 4 0 1mg/L)溶液1.791× 10 6m3 ;从 2 0 0 2年 7月到 2 0 0 3年 8月 ,注入设计量的 32 .8% ,平均浓度 1836mg/L ,井口粘度2 4mPa·s。MO 4 0 0 0试验区面积 2 .39km2 ,油层厚 17m ,注聚井 2 2口 ,井距 2 2 0m ,油井 4 5口 ,含水 94 .3% ,设计注入浓度、段塞结构相同的MO 4 0 0 0清水 (矿化度 6 80mg/L)溶液 3.6 5 7× 10 6m3 ;从 2 0 0 2年 3月到 2 0 0 3年 8月 ,注入设计量的5 2 .8% ,平均浓度 184 1mg/L ,井口粘度 5 0mPa·s。按 2 0 0 3年 8月统计数字 ,KYPAM试验区见效油井比率(4 3.8% )、单井日平均增产油量 (2 .12t)、单井产油量最大增幅比率 (4 74 % ) ,单井增产油量 (2 186t) ,试验区采收率提高 (0 .4 1% )均高于MO 4 0 0 0试验区 (分别为 37.8% ,1.73t,94 % ,16 90t,0 .38% )。图 2表 4参 4。关键词 :梳形聚合物 ;丙烯酰胺共聚物KYPAM ;部分水解聚丙烯酰胺 ;聚合物驱油 ;矿场应用效果 ;

全球M&A·的动向及其效果

一、全球化背景下快速增长的M&A (一)欧洲企业对美国的M&A 据统计1999年全球跨国界的M&A从1998年的6,406亿美元增加到8,528亿美元,增长了41.0%.自1995年以来连续5年刷新了历史最高记录.2000年1-9月已达到8,925亿美元,超过了1999年的水平,连续6年的记录刷新已成定局(参见表1).

M&A浪潮与宏观经济环境

综观上世纪末至今的西方工业国家所发生的五次大规模的企业的并(M&A)浪潮,尽管各自具有不同的方式和特点,但都具有一些共同的宏观经济环境:M&A浪潮与产业结构的变动相互促进;M&A浪潮与资本市场的发展、政府的利率水平、通胀率以及金融工具的创新有着密切的联系;M&A浪潮大多是在反垄断法有所松动,法律环境相对宽松的条件下产生的。

日本M&A市场的新趋势

随着经济全球化的深入,世界规模的企业重组和资金流动改变着各个行业中的企业势力范围。从10年前开始,日本企业为了保卫和加强现有的势力范围防止来自国内或国外的威胁开始了一场新的M&A高潮。这次的M&A不管在M&A件数,还是在所涉及的行业、规模、收购金额大小上都有突破,在日本的M&A历史上留下一页。同时,M&A收购过程也改变了日本社会对M&A的认识,也冲击到了日本传统的终身雇佣制。运用M&A来解决日本社会面临的问题,如人口减少和老龄化的问题也是这次M&A的新尝试。

Integrating AHP into the M&A Strategy

Merger and acquisition(M&A)has become an im-portant fashion for corporation to expand the operatingscale.In the course of drawing up the M&A strategy,it’s necessary that a method be adopted to balancesome kinds of objectives.Analytic Hierarchy Process(AHP)is the multi-criterion decisional method,whichintegrates qualitative analysis with quantitative analysisto solve the complicated problem.This article intro-duces how to apply AHP to drawing up scientific M&Astrategy.

基于SaaS的M&A系统结构设计

文中针对多媒体及广告(Multimedia and Advertisement)系统的功能需求,研究分析了基于应用的M&A系统存在的问题,结合SaaS技术和Web环境的特点,建立了一个基于SaaS的M&A系统体系框架。在此基础上,给出了七层结构设计和服务设计,以及部署方式定义。实现结果表明,新系统具有服务灵活、降低成本、易于维护等明显特点。

Anger and hostility in the aftermath of a wildfire disaster in Greece

Previous studies reported that anger and hostility are often presented in the victims of a disaster. This study investigates the symptoms of anger and hostility after a wildfire disaster in a rural area of Greece. Cross sectional case control study of adult population (18-65 years old). Face to face interview. Data collected were demographic, Symptom Checklist 90-Revised for assessment of hostility, type and number of losses, trust in institutions personal and social attitudes. It was found that more of the victims of the wildfires reported symptoms of hostility compared to controls but this difference was disappeared when we adjust for other variables. Risk factors for development of hostility among the victims were mistrust in military forces and media, high levels of anxiety and distress, younger age and having higher education. It was concluded that anger and hostility after a disaster perhaps are not only related to disaster but other factors concerning demographic and personal characteristics may play an important role.

Cultural Integration in M&A Enterprise

This thesis aims at studying the cultural integration of M&A enterprises,mainly involved with the manifesta-tion,process,type,method,risk and countermeasures of cultural integration in M&A enterprises.It intends to provide a complete set of management and operation sys-tem on cultural integration for M&A enterprises.Keywords:cultural integration,M&A(merger and acquisi-tion).

Biotechnological Potential of Carotenoids Produced by Extremophilic Microorganisms and Application Prospects for the Cosmetics Industry

Carotenoids are isoprenoid pigments used in food, chemical, textile, pharmaceutical, and cosmetic industries. They act not only as dyes and provitamins A but also have antioxidants, photoprotective, antimicrobial properties, among others. This class of pigment can be obtained traditionally by plants or chemical synthesis, but they have some disadvantages. In recent years, search for alternative sources has been an important strategy for the carotenoid industries. Microbial synthesis is an alternative that has shown good yields, speed, and reduced production costs. Hostile environments, such as the Caatinga domain, represent an interesting source of microorganisms that produce biomolecules, especially carotenoids, because of oxidative stress caused by sunlight. Thus, this region has been attracting the attention of the scientific community and industry for the use of these organisms in the production of carotenoids and applications in cosmetic products;since these compounds have interesting antioxidant and photoprotective properties. In this review, general characteristics of carotenoids, sources of production, industrial applicability, and commercialization will be discussed, as well as perspectives on the production of carotenoids from microorganisms isolated from the Caatinga and their application in anti-UV products.