Fascinating organic transformations 2. The ubiquitous hydrogen bond

Hydrogen bonds can transform simple molecules into beautiful architectures. This is well illustrated in this article.     

Molecular origami Modular construction of platonic solids as models for reversible assemblies

Platonic solids, representing the highest order of structural and molecular symmetry have been crafted from single modular elements that carry information relating to lengths and angles.     

Vergleichsarbeiten und schulische Personalentwicklung – Ausmaß und Voraussetzungen der Datennutzung

The introduction of comparative tests in a low-stakes system was carried out in the expectation that the data feedback to schools would act as a stimulus for the development of the schools and the standard of classroom teaching. By contrast with the use of data to develop teaching, the use of data for personnel development has not yet been studied in Germany. On the basis of an on-line survey of head teachers and a paper-and-pencil survey of teaching staff, the study examines for the first time the extent to which comparative test data is used by head teachers for personnel development and as a means to plan in-service training in subject conferences, and what factors influence whether the data is used in this way. Of the head teacher characteristics which were studied (attitude in relation to the perceived usefulness of the data, qualifications, organisation and age of the head teacher), usefulness is the only characteristic which has a positive effect on the use of the data. The use of comparative test data to plan in-service training in subject conferences is positively influenced by data-wise leadership by the head teacher and by collaborative evaluation.     

Web-enabled supply chain management: Key antecedents and performance impacts

Despite increased interest and growing investments in web-based supply chain management (SCM) applications, firms face numerous challenges in successfully web-enabling their SCM activities. In this research, we focus on two main objectives – (i) to understand the key antecedents that affect the web-enablement of SCM activities; (ii) to document the performance impacts of web-enabled SCM efforts. Based on a large-scale, questionnaire survey of North American organizations, we assessed the influence of six factors namely – supplier synergy, information intensity, managerial IT knowledge, interoperable IT infrastructure, perceived IT returns on investments (ROI) and formal governance mechanisms – on the extent of web-enabled SCM. Our results revealed a strong positive influence of supplier synergy, information intensity, managerial IT knowledge, inter-operability and formal governance mechanisms on the extent of web-enabled SCM. We also found a negative association between relative cost–benefit perceptions and the extent of web-enabled SCM. Further, we also found strong positive association between extent of web-enabled SCM and the benefits realized from SCM efforts. We discuss the implications of our results for research and practice.