Amateurs and the Rise of Astrophysics 1840–1910

This essay examines the role of amateurs in founding the astronomical subdiscipline of astrophysics. During 1840–1870, they initiated many of the observing programs that came to comprise the new specialty. And during 1870–1910, they participated both in the ongoing research of the field and the campaign to provide it with an institutional base. These general trends are illustrated by examples from the lives of ten prominent amateur solar physicists.     

The Hellenistic and Roman Syracuse (Sicily) Fine Pottery Production Explored by Chemical and Petrographic Analysis

The chemical composition and petrographic features of 51 samples of fine pottery selected from the archaeological site of Syracuse have been established by means of optical microscopy and X‐ray fluorescence spectrometry, with the aim of creating a reference group for the ceramics produced in this important Greek colony during the Hellenistic–Roman period. This reference group is constrained by the analysis of six kiln wasters and of raw materials outcropping in the studied area. Among the studied findings, the main part is assignable imputably to local production, while some specimens probably come from Greece and other colonies (Messina and Gela). The Syracuse fine pottery is characterized by inclusions formed mainly by quartz and micaceous and fossiliferous groundmass. The used pastes were more or less purified through the removal of the sandy‐to‐coarse silty granulometric fraction. The multivariate statistical analysis of chemical data permits the identification of production at Syracuse on the basis of comparison with the kiln wasters and the Plio‐Pleistocene clays.     

Unterscheidung und Synthese: Rezeptionsformen akustischer Forschung in der Musikliteratur des 19. Jahrhunderts

Differentiation and synthesis. Forms of reception of acoustical research in the musical literature of the nineteenth century. In the nineteenth century, both musical scholars and natural scientists discussed the relevance of acoustical research for the theory and practice of music. Whereas some musical theorists and acousticians plead together for an acoustical foundation of musical theory, other scholars questioned the significance of physical and physiological knowledge for a deeper understanding of music. Based on an analysis of musical journals, popular scientific writings, theoretical treatises and musical dictionaries this article demonstrates how musical scholars and natural scientists argued about the question which discipline should have the final say about musical concepts and terminologies. To merge both heterogeneous spheres – music and acoustics – or to carefully distinguish between them – these two positions shaped the dispute over the relationship between music and natural sciences in the nineteenth century.     

《人文地理》100期刊用文章统计分析

截至2008年4月,《人文地理》出版满100期,在出版100期之际对该刊22年来刊发的2102篇论文、论文第一作者和引文进行了统计分析,以揭示载文量的时空分布特点,展示该刊作者群的基本特点,确定该刊活跃作者群的数量和比例,归纳出人文地理科学工作者利用文献的基本特点和规律,掌握我国人文地理研究队伍的变化及发展状况,并对《人文地理》期刊的发展提供有益的参考。     

高中物理新课程三维目标的教学思考

三维目标是相互联系、相互渗透的整体,是一个完整的人在物理学习探究活动中实现物理素养建构的三个侧面。因此,课堂教学应该全面关注三维目标,并将它整合于统一的物理教学活动过程之中。     

中国旅游从业者职业忠诚度研究

企业员工忠诚对于企业的长远发展至关重要,旅游企业的员工忠诚研究对于旅游企业及区域旅游业的持续发展十分必要.本文通过网络调研对全国31个大陆省区各层次各行业旅游从业者的职业忠诚进行了大样本量问卷调研,并利用SPSS 16.0对所得一手数据进行了统计分析.研究发现：（1）我国旅游从业者的职业忠诚度并不太高,旅游从业者对企业的忠诚度较职业忠诚度略低;（2）人口统计学因素包括婚姻状况、年龄、专兼职、学历、最后毕业专业、工作职务、职称情况不同,旅游从业者忠诚度也不相同,性别只是单一地影响旅游从业者的职业忠诚度;（3）不同类型旅游企业员工的职业忠诚度不同,景区的职业忠诚度最高,其次是旅行社,酒店员工的职业忠诚度最低;（4）工作满意、收入满意、职业前景乐观预期、工作努力回报预期、旅游工作的社会认可度感知及旅游企业环保经营认知因素是影响我国旅游从业者企业忠诚度的重要因素,而工作满意、职业发展前景乐观预期、努力工作回报预期、同事关系、旅游企业环保经营认知、旅游发展的政策环境认知因素对我国旅游从业者的职业忠诚度有显著的影响.     

Wasserstoff als Energieträger. Herstellung,Lagerung, Transport

Abstract

This essay, written to accompany a lecture to new students on the course of Economic Analytics, at the Institute of Econometrics of the University of Lodz in Poland, provides a broad historical account of the development of econometrics. The context enables students to locate various aspects of econometric analysis. The origin of regression analysis is described and an account of cointegration analysis is presented. This essay is concerned primarily with the propagation of the ideas as distinct from the manner and the circumstances in which they have originated.     

On reductionism and emergence in geomorphology

Much geomorphological enquiry has been devoted to the understanding of landscapes via the construction of models based on the relationships between process and form. This paper examines the philosophical, theoretical and practical problems involved in bridging the gap between studies of geomorphological processes and explanations of landscape development. It argues that process geomorphology is essentially reductionist and discusses the practical and logical limitations of such an approach to science. It suggests that landscapes are emergent phenomena and, by drawing from the philosophical and practical lessons derived from the physics of non-linear systems, demonstrates that they are not amenable to reductionist explanations.     

Tesserae Recycling in the Production of Medieval Blue Window Glass

The purpose of this paper is to develop a means of quantifying glass recycling and to discuss the ‘anachronistic’ chemical composition of medieval blue window glass. This method relies on a new numerical method using kernel density estimates and is based on a database of published glass chemical compositions. It seeks to reveal when, to what extent and why blue tesserae were recycled for the production of French and English blue glass. First, it is suggested that blue glass had an ‘anachronistic’ chemical composition only before the 13th century. Second, the ‘anachronistic’ chemical composition of 12th‐century blue glass comes from the recycling of both blue tesserae and non‐coloured glass. Finally, this recycling was motivated by the scarcity of cobalt sources until mines were found in the 13th century.