Conservation of stained glass windows with protective glazing: Main results from the European VIDRIO research programme     

Adriana Bernardi  Francesca Becherini  Marco Verità  Patrick Ausset  Maura Bellio  Ulrike Brinkmann  Helene Cachier  Anne Chabas  Felix Deutsch  Marie-Pierre Etcheverry  Franco Geotti Bianchini  Ricardo H.M. Godoi  Velichka Kontozova-Deutsch  Roger Lefèvre  Tiziana Lombardo  Peter Mottner  Chiara Nicola  Isabelle Pallot-Frossard  René Van Grieken 《Journal of Cultural Heritage》2013,14(6):527-536

The methodology of protecting the European stained glass windows against environmental risk (e.g. meteorological factors, air pollution, microorganisms) by means of an external glazing is not new. In spite of many scientific studies carried out in the last 20 years, some questions were still up for discussion. The European VIDRIO (2002–2005) project gave an answer to these questions. The research carried out by the different project partners established a new multidisciplinary approach aimed at evaluating the efficiency of the protective glazing systems and their effects on stained glass windows conservation, and finally at assessing the most appropriate strategy to preserve stained glass windows. Scientific results showed that the so-called isothermal glazing (i.e. ventilation by the air coming from the inside of the building) protected efficiently the ancient stained glass window from environmental attack (i.e. rain, pollutants, condensation, thermal shocks) with very limited secondary effects. The scientific research highlighted that its efficiency was strongly related to the technical design of the protective system. In particular, the ventilation and the size of the interspace had to be carefully considered. The research developed within the VIDRIO project was turned into general recommendations to the owners and practitioners on the best practice for the stained glass windows future conservation.  相似文献   

Observer based leader-following consensus of second-order multi-agent systems with nonuniform sampled position data     

Syed Ali Ajwad  Tomas Ménard  Emmanuel Moulay  Michael Defoort  Patrick Coirault 《Journal of The Franklin Institute》2019,356(16):10031-10057

This paper deals with the leader-following consensus problem of multi-agent systems with the consideration that each agent can only transmit its position state to the neighbors at irregular discrete sampling times. In the proposed algorithm, a continuous-discrete time observer is designed for the continuous estimation of both position and velocity from the discrete position information of the neighbors. These estimated states are then used for designing a continuous control law which solves the leader-following consensus problem. Moreover, the dynamics of the leader is not fixed and can be controlled through an external input. The stability analysis has been carried out by employing the Lyapunov approach which provides sufficient conditions to tune the parameters according to the maximum allowable sampling period. The developed algorithm has been simulated and then tested on an actual multi-robot system consisting of three differential drive wheeled robots. Both simulation and hardware results validate the effectiveness of the control algorithm.  相似文献   

Attracting solutions in crowdsourcing contests: The role of knowledge distance,identity disclosure,and seeker status     

Patrick Pollok  Dirk Lüttgens  Frank T. Piller 《Research Policy》2019,48(1):98-114

We investigate in the context of crowdsourcing how seekers can increase open innovation performance, measured as received solver attention, by making two strategic decisions: selecting innovation tasks that are well suited for crowdsourcing and choosing between the potentials of status signalling through identity disclosure versus enjoying the benefits of anonymity. Drawing on uncertainty reduction theory, we suggest that a well-articulated problem statement reduces uncertainties of potential solvers and increases their willingness to participate. We argue that the ability of seekers to draft high-quality problem statements depends on the distance between the problem domain and their current knowledge stock. An analysis of 637 crowdsourcing projects finds that problem-seeker knowledge distance and received solver attention are curvilinear related such that moderate levels of knowledge distance maximize solver participation. However, high-status seekers who engage in identity-based status signalling are able to benefit from crowdsourcing across all levels of problem-seeker knowledge distance.  相似文献   

Robot-proof: higher education in the age of artificial intelligence     

Patrick Camilleri 《师资教育杂志》2018,44(4):519-520

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Fateful aspects of aspiration among graduates in New York and Los Angeles     

John Loewenthal  Patrick Alexander  Graham Butt 《International Studies in Sociology of Education》2019,28(3-4):345-361

ABSTRACT

This article presents ethnographic research on the aspirations of graduates from a private university in New York City, some of whom move to Los Angeles. Findings depict financial and family pressures exerting a governing force upon the graduates’ futures, often beyond their control. Focusing on the narratives of four individuals, we introduce the language of fate as a means of conceptualising the potential repercussions of aspiration and Higher Education. The premise of both is an increased determinacy over one’s future, yet in the high-stakes U.S. context here examined, this financial investment and articulation of family hope may generate fated (seemingly inescapable) and/or fateful (ominous) outcomes. The dynamic of ‘cruel optimism’ illustrates some of the paradoxical consequences of Higher Education, whereby people may be punished by their aspirations. We discuss what factors affect differing outlooks on the future and imply alternative dimensions to adversity beyond the remit of ‘inequality’.  相似文献   

Values,interests and attitudes within vocational behaviour     

Monique Wach  Patrick Gosling 《European Journal of Psychology of Education - EJPE》2004,19(3):223-226

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Evaluating multigrade school reform in Latin America   总被引：1，自引：0，他引：1  

Patrick J. McEwan 《比较教育学》2008,44(4):465-483

This paper describes three multigrade school reforms in Latin America: (1) Colombia’s Escuela Nueva, (2) Guatemala’s Nueva Escuela Unitaria, and (3) Chile’s MECE‐Rural. Each reform endowed primary teachers and students with special training and instructional materials, and encouraged new kinds of instruction in rural classrooms, with the goal of improving student learning. The paper discusses the challenges to evaluating school reforms in a rural context. It then reviews the international literature on each reform, assessing whether reforms were effectively implemented and whether they caused improvement in student outcomes. Even in the best cases, multigrade schools were not fully implemented. There is consistent evidence of positive effects on student achievement. Yet, the causal interpretation of evaluation findings is severely limited, especially in Guatemala and Chile. It concludes with suggestions for improving multigrade evaluations.  相似文献   

前西班牙时代那哇特尔文化的口头性与书面性     

帕特里克·约翰松  刘明 《新疆师范大学学报(哲学社会科学版)》2008,29(1):43-49

在西班牙占领本地之前,口头文学和图画文字是那哇特尔人表现、保留和传承其文化传统的有效工具.任何一篇文字的内容,都可以通过口述或者看图说话的方式来表达.这两种方式的表现力都远远地超过了言语本身,因为词语的"文本"在口头演出当中通过声音、手势、舞蹈、音乐、节奏、多彩的象形文字、特定的时空氛围而被"具体化"了.同样,书写的文本也因文字画、意符、音符以及颜色、形状、大小、位置、间隔关系、笔势以及图纹的双层影像等而被"具像化"了.尽管古抄本中的图画主要是被设计来"看"而不是(西方人观念中的)读的,很可能有与之相配的口述文本同时存在,它们从图像中生发而出,或者作为图本的补充存在.文章将涉及以下一些问题:第一,在前西班牙时代.人们是如何来"阅读"、也就是符号性地解释一个图画文本的?第二,图形比喻怎样触发口头表演?第三,口头演出如何"扎根"于图画?第四,言语的独白或对话在看图说话时如何得以运用或被参照?全部分析以那哇特尔(nahuatl)印地安人的手抄本和由西班牙人及其印地安助手们(根据当地土著的口述)所搜集和记录下的那哇特语文献为基础.  相似文献   

The Vestiges of Childhood Interparental Conflict: Adolescent Sensitization to Recent Interparental Conflict     

Patrick T. Davies  Morgan J. Thompson  Meredith J. Martin  E. Mark Cummings 《Child development》2021,92(3):1154-1172

This study examined whether childhood interparental conflict moderated the mediational pathway involving adolescent exposure to interparental conflict, their negative emotional reactivity to family conflict, and their psychological problems in a sample of 235 children (M_age = 6 years). Significant moderated-mediation findings indicated that the mediational path among Wave 4 interparental conflict during adolescence, change in youth negative reactivity (Waves 4–5), and their psychological problems (Waves 4–6) was significant for teens who experienced low, rather than high, levels of childhood interparental conflict (Waves 1–3). Supporting the stress sensitization model, analyses showed that adolescents exposed to high interparental conflict during childhood evidenced greater increases in negative reactivity than their peers when recent parental conflicts were mild.  相似文献   

Mission to Planet Markle: Problem-Based Learning for Teaching Elementary Students Difficult Content and Practices     

Peffer  Melanie E.  Renken  Maggie  Enderle  Patrick  Cohen  Jonathan 《Research in Science Education》2021,51(5):1365-1389

Research in Science Education - Young children can struggle to learn difficult disciplinary content and important skills for practicing science. Problem-based learning (PBL) may be useful for...  相似文献