The standard base of Russia for measurements of alternating electric voltage

The present state of the standard base of Russia for measurements of alternating electric voltage at frequencies of 20 Hz–3000 MHz is considered. __________ Translated from Izmeritel’naya Tekhnika, No. 11, pp. 44–47, November, 2007.     

Principles of a standard survey and damage classification system for concrete structures

Resume Cet article énumère et décrit successivement les principales sections que devrait inclure un système type d’examen et de classification des dommages des constructions en béton, la section 2.1 faisant ressortir les avantages de l’application du système. Cet article fait partie du travail de la Commission de la RILEM 104-DCC. Toute discussion de cet article serait la bienvenue.      

Fullerenes in Russia

Abstract

Structure and main features of the Russian Research Program “Fullerenes and Atomic Clusters” are presented. Results of investigations in the framework of this Program in 1996 are briefly reviewed.     

Fullerenes in Russia

Structure and main features of the Russian Research Program “Fullerenes and Atomic Clusters” are presented. Results of investigations in the framework of this Program in 1996 are briefly reviewed.     

The present state and future prospects for developing the standard base of Russia for measurements of dc voltage

The problems involved in developing the standard base of Russia in the area of measurements of dc voltage in the range up to 1000 V are considered. __________ Translated from Izmeritel’naya Tekhnika, No. 11, pp. 42–44, November, 2007.     

Russia

Abstract

The search for a method of obtaining pictures without the aid of a brush was conducted for a long time by scientists and inventors in different countries. As early as 1725, a young Russian amateur chemist, who was studying the preparation ofliquid medicines, made a remarkable observation: solutions of iron salts changed their colour under the action of sunlight. This chemist was Aleksei Petrovich Bestuzhev-Ryumin, who was to become Chancellor of the Russian Empire. Two years later, similar experiments, but with silver salts, were conducted by the German scientist Johann Heinrich Schulze. Such observations stimulated keen minds to undertake a search for ways and means of ‘fixing’ the imprints made by light.