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Rheology of Poly(vinyl butyral)Solution Containing Fumed Silica in Correlation with Electrospinning

Chinese Journal of Polymer Science 2018年第6期36卷 742-748页

作者： petra peer Martina Polaskova Pavol Suly Institute of Hydrodynamics of the Czech Academy of Sciences Pod Patankou 5166 12 Prague 6Czech Republic Centre of Polymer Systems Tomas Bata University in Zlintrida Tomase Bati 5678760 O1 ZlinCzech Republic Department of Polymer Engineering Faculty of TechnologyTomas Bata University in ZlinVavreckova 27576001 ZlinCzech Republic

The rheological properties in question are influenced by many factors, ranging from the characteristics of the given polymer or solvent to the flowing conditions. The primary focus of this study is to analyse the rheological behaviour of poly（vinyl butyral）—Mowital B 60 H—（PVB） solutions dissolved in methanol and a blend of these with fumed silica nanoparticles. The preparation of the nanofibrous web and the quality of nanofibres were correlated with the rheology of the polymer solution. It was discerned that drastically intensifying shear viscosity and the elasticity of the solution exerted a negligible effect on the formation of fibres, a finding which has rarely been discussed in the literature. The morphologies and structures of the PVB/silica nanofibrous membranes were investigated by scanning electron microscopy, thermogravimetric analysis and Fourier transform infrared spectroscopy.

关键词： Electrospinning Nanofibres Poly(vinyl butyral) Fumed silica Rheology

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Associations between the physical environment and park-based physical activity:A systematic review

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Journal of Sport and Health Science 2019年第5期8卷 412-421页

作者： Ru Zhang Hagen Wulff Yanping Duan petra Wagner Department of Sport and Physical Education Faculty of Social SciencesHong Kong Baptist UniversityHong Kong 999077China Institute of Exercise and Public Health Faculty of Sport SciencesUniversity of LeipzigLeipzig 04109Germany

Background:With an increase in the evidence for the associations between park-based physical activity(PA)and physical environments(especially park and neighborhood environments),researchers face an important challenge in interpreting and summarizing the evidence to develop environ?mental change *** updated review is needed to better inform policymaking and environmental *** current study aimed to systematically review the research on the associations of park-based PA with park and neighborhood environmental ***:We targeted English peer-reviewed articles from 5 electronic databases using keywords related to park-based PA,park environments,and neighborhood *** the 4071 identified papers,25 studies published between 2008 and 2016 met all the eligibility criteria and were included in this ***:The characteristics of physical environment that received consistent support included paths/trails,lighting,and incivilities(e.g.,broken glasses and litter).Mixed findings were revealed for 6 park environmental factors(unspecified active facilities,playgrounds and skating areas,fit?ness stations,picnic areas,greenness,and park size)and 2 neighborhood environmental factors(park density and park proximity).Conclusion:It can be concluded that paths/trails,lighting,and incivilities are 3 key physical environmental attributes of park-based *** the inconsistent findings on park and neighborhood environmental factors,more robust designs such as prospective investigation are required.

关键词： Neighborhood Park-based physical activity Park environment Physical environment Systematic review

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Default or profit scoring credit systems?Evidence from European and US peer-to-peer lending markets

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Financial Innovation 2022年第1期8卷 954-974页

作者： Štefan Lyócsa petra Vašaničová Branka Hadji Misheva Marko Dávid Vateha Faculty of Management and Business University of PrešovPrešovSlovak Republic Institute of Economic Research Slovak Academy of SciencesBratislavaSlovak Republic ZHAW School of Engineering WinterthurSwitzerland Depart-ment of Banking and International Finance Faculty of National EconomyUniversity of Economics in BratislavaBratislavaSlovak Republic Faculty of Economics and Administration Masaryk UniversityLipová507/41a60200 BrnoCzech Republic

For the emerging peer-to-peer(P2P)lending markets to survive,they need to employ credit-risk management practices such that an investor base is profitable in the long ***,credit-risk management relies on credit scoring that predicts loans’probability of *** this paper,we use a profit scoring approach that is based on modeling the annualized adjusted internal rate of returns of *** validate our profit scoring models with traditional credit scoring models,we use data from a European P2P lending market,Bondora,and also a random sample of loans from the Lending Club P2P lending *** compare the out-of-sample accuracy and profitability of the credit and profit scoring models within several classes of statistical and machine learning models including the following:logistic and linear regression,lasso,ridge,elastic net,random forest,and neural *** found that our approach outperforms standard credit scoring models for Lending Club and Bondora *** specifically,as opposed to credit scoring models,returns across all loans are 24.0%(Bondora)and 15.5%(Lending Club)higher,whereas accuracy is 6.7%(Bondora)and 3.1%(Lending Club)higher for the proposed profit scoring ***,our results are not driven by manual selection as profit scoring models suggest investing in more ***,even if we consider data sampling bias,we found that the set of superior models consists almost exclusively of profit scoring ***,our results contribute to the literature by suggesting a paradigm shift in modeling credit-risk in the P2P market to prefer profit as opposed to credit-risk scoring models.

关键词： Profit scoring Credit scoring Financial intermediation P2P Fintech

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弱势群体同伴支持研究的范围综述

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International Journal of Nursing Sciences 2023年第4期10卷 587-601页

作者： Kalina Mikolajczak-Degrauwe Sybren R.Slimmen Dylan Gillissen petra de Bil Valerie Bosmans Corrine Keemink Inge Meyvis Yvonne J.Kuipers Research Group Healthy Region HZ University of Applied SciencesVlissingenNetherlands Department of Health and Social Studies School of MidwiferyArtesis Plantijn University of Applied SciencesAntwerpBelgium School of Health and Social Care Edinburgh Napier UniversityEdinburghUK

目的了解不同弱势群体同伴支持的知识和证据现状,确定同伴支持的优势、劣势、机会和威胁。方法按照Arksey和O?蒺Malley提出的范围综述方法框架,在PubMed,APA PsychInfo,Education Resources Information Center等中检索文献。根据Rodger... 详细信息

目的了解不同弱势群体同伴支持的知识和证据现状,确定同伴支持的优势、劣势、机会和威胁。方法按照Arksey和O?蒺Malley提出的范围综述方法框架,在PubMed,APA PsychInfo,Education Resources Information Center等中检索文献。根据Rodgers的概念分析法和SWOT分析法,采用主题综合法报告数据。结果共纳入45项研究,介绍了针对年轻移民和无人监护的未成年人、自闭症患者、有(精神)健康问题的人等群体的各种同伴支持活动。同伴支持的优势在于其对弱势群体生活质量的积极影响;劣势在于,同伴过于投入或关注个人利益,以及他们缺乏专业技能和知识;机会在于相互学习、预期的长期效果及促进社会包容的潜力;威胁在于,文化、语言障碍、退出率、确保可持续性以及同伴缺乏时间和承诺。结论尽管同伴互助对各类弱势群体有较好效果,但要提供和推广同伴支持,还需要考虑其弱点和威胁。

关键词：同伴支持范围综述社会因素弱势群体

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