Seawater desalination by reverse osmosis

Until comparatively recently the purification of sea or brackish water depended largely on some form of distillation. In recent years, however, a number of industrial concerns have directed increasing attention to processes depending on reverse osmosis. A number of large plants have been installed and this article reviews the present state of reverse osmosis technology and the factors determining its efficiency. Its advantages include its relatively low fuel consumption, and in this respect further substantial savings are in prospect.     

德国的大学和科学

你们已经听说我是一个数学家。我的兴趣一直集中于科学本身，而不是它的科学机构和科学组织。不过，今晚我要谈的主要内容是关于德国的大学和科学研究机构，所以我恳求诸位理解我不是谈论这一主题的专家。我是通过我     

Writing to learn: can reflection journals be used to promote self-reflection and learning?

The purpose of the present study was to evaluate whether there is evidence of reflection in student-written journals and to investigate whether students show improvements in their reflective skills through journal keeping. To that end, the reflection journals of 3460 first-year students enrolled in a polytechnic were studied by means of an automated coding procedure. Data used in the analyses were students' journals for an entire week, collected once at the beginning and again at the end of an academic year. Outcomes of the content analyses suggest that there is evidence of reflection in students' journals and that students reflected on three general categories related to their learning: critical review of past learning experiences, cognitive learning strategies and summaries of what was learnt. Furthermore, the findings also indicate that students show improvements in their reflective skills as they progressed through the academic year. The findings when taken together suggest that reflection journals can be used to promote self-reflection and learning amongst students.     

Neuere Entwicklungen im Unterricht der lebenden Fremdsprachen 2. Seminar des Europarates in London, 12.–23. März 1962

Ohne Zusammenfassung     

IFE goes international

Ohne Zusammenfassung