排序方式： 共有43条查询结果，搜索用时 234 毫秒
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Benedetto Bozzini Belén Alemán Matteo Amati Marco Boniardi Vincenzo Caramia Giuseppe Giovannelli 《文物保护研究》2017,62(8):465-473
A recent assessment (Giovannelli, G., D'Urzo, L., Maggiulli, G., Natali, S., Pagliara, C., Sgura, I. & Bozzini, B. 2010. Journal of Solid State Electrochemistry, 14: 479–94.) of the corrosion state of a late Bronze Age artefact (ca. 1100 BCE) exposed to a coastal environment, based on optical and scanning electron microscopies, X-ray fluorescence mapping, and X-ray diffractometry, led to recognition of bronze disease conditions essentially related to the presence of nantokite locked inside mesoscopic subsurface pits. The object was then treated successfully with a novel electrochemical approach specifically designed to allow penetration of the electric field into deep, screened pits. In order to further develop and optimize this promising approach by fine-tuning the capabilities of electrochemical control, more insight is required on the specific morphochemistry of the corrosion product scenario. To this end, here we report a space-dependent compositional and chemical-state analysis, performed with synchrotron-based scanning photoelectron microspectroscopy. The investigated object consists of a segregated cast bronze. The prevailing corrosion form is preferential attack of Sn-rich phases, accompanied by a synergistic type of Sn and Cu attack triggered by the peculiar type of decuprification taking place in a bronze disease framework and characterized by the formation of Sn(OH)Cl as a result of local HCl generation in the Cu corrosion process. 相似文献
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至尊语言——作为学术界统治语言的英语 总被引：1，自引：0，他引：1
英语正在以前所未有的态势统治着科学、学术和教学。尽管英语不可能像13世纪欧洲大学中的拉丁语那样,成为教学和学术的唯一语言,将其与拉丁语类比,在今天还是有一定道理的。回首13世纪,拉丁语不仅带来了大学的国际 相似文献
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Andreas Bach 《师资教育杂志》2019,45(3):306-321
The partnership model ‘School Adoption’ was developed in Norway as a part of teacher education and in the meantime, is being implemented in several European countries as an internship concept. The core element is the so-called ‘adoption week’, during which student teachers teach all the lessons at a school, while the teachers attend a professional development course. University teacher educators work intensively together with student teachers and teachers. The student teachers who participate in the School Adoption experience their future professional field under increasingly real conditions and also in its entire complexity. How the complex internship is processed cognitively by student teachers, has not yet been examined. This study at the German University of Flensburg, is designed to evaluate student teachers’ concerns and stress experiences, and determine which factors are relevant for being able to deal with the high level of complexity. Content analyses show that student teachers’ biggest concerns are classroom management and recognition as a teacher, as well as an increase in the workload. The findings also indicate that internship settings with a high level of complexity, can be perceived as a positive challenge in the context of sufficiently structured preparation and support. 相似文献
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Brittany Pollentier Sonya L. Irons Courtney Manfredi Benedetto Anne-Marie DiBenedetto Dana Loton Rebecca Diane Seyler Mira Tych Roberta A. Newton 《Cardiopulmonary Physical Therapy Journal》2010,21(1):13-21
Purpose: To evaluate the reliability and validity of the six-minute walk test (6MWT) with respect to its ability to predict functional capacity in patients with chronic heart failure. Methods: A systematic review was performed via 8 databases to assess relevant English language full-text articles published from January 1, 1980 to October 31, 2009. Participant characteristics, interventions, reliability, validity, and predictive value for each article with respect to functional capacity as defined by peak VO2 levels were extracted and compared. Quality Assessment of Diagnostic Accuracy Studies (QUADAS) scores were determined for each study. Results: Fourteen studies met the selection criteria. Comparison of the studies investigating reliability shows that the 6MWT has good reproducibility. The 6MWT demonstrates moderate correlation with peak VO2 levels, and ability to predict VO2 (functional capacity) dependent on distance walked. Cut-off distances vary from 300 to 490 meters depending on the study; if total distance walked remains equal or less than these values, the 6MWT retains its strong predictive value. Conclusion: The 6MWT has good reliability, moderate validity, and a significant ability to predict functional capacity in patients with CHF who do not walk greater than 490 meters.Key Words: six-minute walk test, chronic heart failure, functional capacity, peak VO2 相似文献
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Antonio Serra Daniela Manno Emanuela Filippo Rosa Vitale Giuseppe Sarcinelli Lucio Calcagnile Gianluca Quarta Giuseppe Giovannelli Benedetto Bozzini Aldo Siciliano 《Journal of Cultural Heritage》2010,11(2):233-238
Out of the staters collection of the National Archaeological Museum of Taranto, during the full examination of about one hundred coins minted by the Greek colony of Taras between the V century BC and the III century BC, our attention has been devoted to a lead coin, which has been regarded for many years as a genuine silver coin. This artifact, entry number 13 in the inventory list for the Parabita hoard, has been studied with the combined use of surface and micro-analytical techniques (SEM, EDX, PIXE, XRD). The joint use of different analytical techniques allowed us to obtain information about the morphology, the structure and the chemical composition of the analysed coin, that revealed a lead core coated with a bi-layer of copper and silver. 相似文献
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Elena Neiterman Christine Sheppard Souraiya Kassam Vanessa Bach Saman Husain 《Educational gerontology》2020,46(6):339-349
ABSTRACTIn the study of gerontology, fieldwork with older adults is often used to enhance students’ understanding of the aging process. While assignments based on interactions with older adults are a common practice in teaching students enrolled in gerontology studies, we know less about the impact of such activities on students from other disciplines. This paper summarizes students’ experiences with an assignment offered to a diverse cohort of undergraduate students who took a course in social gerontology. To complete this assignment, students had to interview an older adult, summarize the life story of the participant, apply a theoretical perspective to the older adult’s life story, and reflect on the process. Analyzing data derived from 72 assignments and 10 semi-structured interviews with students who were enrolled in the course, this paper examines students’ experiences with this assignment. Specifically, we identify what aspects of the assignment students found beneficial, what aspects they found challenging, and in what ways this assignment helped students to enhance their understanding of aging. Our findings suggest that students found it challenging to recruit an older adult for an interview and struggled with the semi-structured nature of the interview process. All students found the actual interview process to be extremely rewarding and beneficial for their learning. In discussion, we provide some recommendations on how to offer this type of assignment to a diverse group of students enrolling in the courses on social gerontology. 相似文献
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