IGUS は不安定物質の特性や試験方法に関する研究者の国際コンソーシアムであり，爆発性・酸化性物質作業部会（EOS）の年1 回の会合では有機過酸化物，自己反応性物質､その他エネルギー物質，肥料，硝酸アンモニウム､酸化剤の試験方法，分類，安全を取り扱っている．2010 年のEOS は東京で開催され， 12 カ国・地域から産官学の研究者が参加した． 本年は，不安定物質の試験方法や分類についての議論，ヨーロッパの法律についての紹介，国際ラウンドロビンテストの結果などについて情報交換が行われた．本稿ではEOS の議長Wehrstedt 博士を中心としたメンバーによるEOS の紹介及び本年の会議の議題についてのレポートも掲載している． EOS は規制当局からの出席者，大学，研究機関，民間企業からの出席者が個人的に親交を深めることができる場である．さらなる情報は本文中にあるHP をごらん頂きたい．

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There seem two major streams with respect to the higher education (university education) in the world, namely an educational system in the US and a system found in EU countries. In the present report, it is attempted to summarize the recent trends of higher educational system in EU. The Bologna Process and ECTS are introduced, and recent trends observed in Finland is summarized. As an example in engineering education, the merger of three universities including Helsinki University of Technology is explained. Although Finland is not a large country with only 5.4 millions in population, their efforts are quite informative to the universities in Japan from the aspect of globalization and rapid measure to the changes surrounding universities.

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The authors proposed fundamental correlations among some variables having influences upon the design and operation of closed-circuit grinding¹⁾, and then a new index for expressing the performance of a classifier as the ratio of a specific surface of tailing to that which would be obtained if the ideal separation should occur.²⁾
In this article, it is reported that the index a obtained from the operating data on several mechanical classifiers employed in Japanese cement plants for treating raw material is found to be about 3-5, which differs considerably from 1 obtained in the case of an ideal separation. The index varies with the change in the specific surface of feed powder, the parting size and the circulating load, as shown in Eq. (12). The parting size x_c, which has already been defined by Tanaka, ²⁾ is correlated with the dimensions of all parts inside the classifier and rotating speed of shaft as shown in Eq. (10). The maximum size of particles in fine x_m, is theoretically treated and then observed by means of a microscope. The relation between parting size x_c and the maximum size x_m is illustrated in Fig.5.

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In addition to the International Commission on Radiological Protection (ICRP), there are several international organizations that are engaged in activities related to radiological protection. This article briefly reviews the aims and major activities of and interrelationships between those organizations, followed by opinions about how Japanese experts should contribute to those activities.

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