Changes in the representation of alien taxa in ruderal vegetation of an urban ecosystem over 50 years. A case study from Malacky city,Slovakia, Central Europe

This paper analyses changes in the representation of alien taxa in ruderal vegetation of a model urban ecosystem. Two datasets of phytosociological relevés of ruderal communities from the area of Malacky (a city in southwestern Slovakia) were analysed. The relevés were recorded 50 years apart, the old relevés were recorded in the years 1954–1969 and the more recent relevés in the years 2014–2015. The average values of percentage number and percentage cover of archaeophytes and neophytes as groups in old and more recent datasets were compared. We also calculated the proportion of each taxon of archaeophytes and neophytes in ruderal vegetation in both periods. The results revealed a decrease in the average percentage number and percentage cover of archaeophytes in almost all classes of ruderal vegetation between the new and old dataset. On the contrary, an increase in representation of neophytes in all classes was recorded. Some rare taxa of archaeophytes were only recorded 50 years ago (e.g. Veronica opaca, Xanthium stumarium), while many taxa of neophytes (including some invasive taxa e.g. Ambrosia artemisiifolia, Stenactis annua) were only recorded in the years 2014–2015 in the ruderal vegetation of the urban ecosystem of Malacky.     

The effect of the still‐face paradigm on infant behavior: A cross‐cultural comparison between mothers and fathers

Most still‐face paradigm (SFP) studies have been done in Western families with infant–mother dyads. The present study investigated the SFP pattern in 123 Dutch and 63 Chinese 4‐month‐old infants with mothers and fathers. The classic SFP effect was found for positive affect and gaze in both countries. For negative affect, Chinese infants showed a different SFP pattern than Dutch infants. With fathers, infants displayed a less pronounced SFP pattern for positive affect and an increase from the still face to the reunion for negative affect. Only a minority of infants showed the expected SFP pattern across episodes. Our findings support that infant emotion expression is influenced by parent gender and cultural context. An interesting avenue for further study is the exploration of the origins of within‐ and between‐gender and culture differences in affective communication between parents and infants.     

Child care subsidy and child maltreatment

This study examined the relationship between receipt of child care subsidies and child maltreatment investigations in a sample of low‐income mothers in Illinois. We expected that receiving child care subsidies would have a protective effect on child maltreatment risk and therefore decrease the likelihood of child protective services investigations. Using structural equation modelling, we tested the direct and indirect paths of the receipt of child care subsidies to physical abuse or neglect. We found only direct effects of receiving child care subsidies on both physical abuse and neglect investigations. The findings suggest an important protective role of child care subsidies in the lives of low‐income families.     

国内众筹平台上出资者行为研究——以京东众筹为个案

众筹作为一种新型互联网金融模式,近年来深受企业和个人的关注。分析众筹平台上出资者的行为规律对提高融资绩效具有重要价值。文章以京东众筹平台上1 016个众筹项目的面板数据为样本,对我国众筹市场中出资者的行为开展了实证研究。研究发现：以筹资目标完成作为分界点,国内众筹市场中出资者的出资行为先后表现出羊群行为和旁观行为。具体表现为：在达到筹资目标额之前,项目的筹集进度越高,越能吸引出资者参与（即羊群行为）;一旦项目完成筹资目标,项目的筹集进度越高,出资者反而减少（即旁观行为）。此外,众筹平台的网络关注度、众筹项目的首页推荐、众筹项目的更新、众筹项目的互动以及众筹项目的关注均对出资者的出资有正向影响。     

美国经常账户逆差与经济增长持续性浅析及对中国的启示

克林顿时期,美国经济创造了连续10年的繁荣;布什上台之后,美国经济在经历了“9·11”带来的低迷之后,重新步入高速增长的轨道。其中,美国的经常项目的逆差对于美国经济的增长起着不可磨灭的作用。在金融全球化的背景之下,美国奉行的强势美元政策在弥补经常项目逆差,促进国际收支的平衡,进而促进美国经济的发展方面都发挥了强大功效;而布什采取的美元贬值策略,更深刻体现了强势美元相机而动、能屈能伸的强势特色。新的世界经济背景决定着美国对于世界经济的影响力不仅没有减弱,反而有所增强。中国有着同美国不同的国际收支格局。中国存在着经常项目的大规模顺差,而人民币在国际上的地位决定了中国没有自行决定人民币强势或者弱势的能力。目前,中国利用经常项目顺差最为现实的途径是引进高新技术,这能够给中国经济的发展带来长久稳定的增长动力。     

试论我国发展循环经济的政策支撑体系建设

发展循环经济是建设资源节约型环境友好型社会的必然选择．要充分发挥循环经济的价值,必须建设相应的政策支撑体系。     

抗战时期西南实业协会的成立及其主要活动

西南实业协会是抗战时期大后方的一个重要社会组织。该协会的前身应追溯到1932年开始的星五聚餐会。全面抗战爆发后,为促进大后方实业发展,实业界人士于1939年在重庆组织成立了西南实业协会,并开展一些活动。     

马克思唯物史观的双重超越及其意蕴

马克思创立的唯物史观既揭示了社会历史的本质和发展规律,在人类认识史上实现了社会历史观的根本性变革,又深刻阐明了人在世界中的地位和作用,确立了历史发展的主体尺度,将人的解放和发展作为社会历史观的价值取向,因而是科学性与价值性的高度统一.对此的完整解读,有助于澄清将唯物史观认定为纯粹科学认识甚至是"经济决定论"的误读,对在理解社会发展时只见物质不见人、只强调合规律性而忽视目的性的做法也是一种纠偏.全面把握唯物史观的双重超越及其当代价值,对深入贯彻落实"四个全面战略",正确把握"五大新发展理念"的实质和方向,以及推进新时代中国特色社会主义伟大事业具有重要的现实意义.     

教育服务贸易对我国经济发展的影响及对策

加入WTO后,我国国内的高等教育不论是规模上还是质量上都有了大幅度的提高,但由于我国教育服务贸易发展相对较晚,竞争力显得比较弱。教育服务贸易对我国经济的增长有着直接的关系,因此如何推动我国教育服务贸易的发展直接影响到我国经济的未来发展。     

基于Android智能终端的心电与呼吸监测系统设计

随着移动医疗监护设备正逐步趋向于个性化、智能化和网络化发展,本文设计了一种基于Android平台的心电与呼吸监测系统。该系统由采集装置、Android智能终端、远程服务中心组成,采集装置经导联线连接心电电极获取心电与呼吸信号,Android智能终端通过OTG接口与采集设备建立连接,实时接收心电与呼吸数据,完成数据处理、分析、显示与存储,并通过移动网络上传数据文件,以实现与远程服务中心的信息交互。整个系统小巧、便携、功耗低,有效提高了监测系统的智能性和移动性,运行结果表明:该系统性能稳定,达到了系统设计要求。