Search

The effects of the amplitude nonuniformity of the magnetic field in a betatron on the forced and betatron radial oscillations of electrons during extraction (or discharge toward the target) at the end of the acceleration cycle are examined. The amplitude and phase dynamics of radial betatron oscillations are studied by means of an analog computer. [ABSTRACT FROM AUTHOR]

Using histochemical techniques the glycogen content and the activities of glycogen synthetase (UDPGGT) and phosphorylase were studied in the livers of 106 golden hamsters under following experimental conditions: a) starvation of 16, 36, 48, 72 and 96 hours; b) alloxan-diabetes of 24, 48 and 72 hours; c) insulin-treatment (2 units, 30 min) after 24, 48 and 72 hours of alloxan diabetes. - Starvation leads to a depletion of liver glycogen during the first 48 hours, which is finally restricted to zone 3 of the liver acinus. After starvation of 72 and 96 hours a new glycogen accumulation is demonstrable in the microvasculatory periphery of the acinus (zone 3 and 2). The process of glycogen depletion is characterized in the beginning by a high phosphorylase activity in all zones of the acinus, later only in the forefield of glycogen content. The weak activity of glycogen synthetase is mainly restricted to zone 3. - All phases of glycogen depletion are to be found in alloxan diabetic animals, too. Out of 45 hamsters 23 showed an extreme depletion of glycogen; typical for this situation is a weak or absent glycogen synthetase activity in zone 3 and a broad field of phosphorylase activity in zones 1 and 2. The short stimulation by insulin leads to a considerable increase of glycogen synthetase activity at the portally oriented border of the glycogen area and to a shift of the moderate phosphorylase activity to zone 1. Thus the histochemical characteristics of glycogen depletion are: a shift of the reduced glycogen content in direction of the microvasculatory periphery of the liver acinus (zone 3), caused by a high phosphorylase activity in the portal forefield, while glycogen synthetase activity is low in the glycogen area. The histochemical characteristics of glycogen accumulation are: after a short phase of glycogen synthesis in all hepatocytes a moderate phosphorylase activity in zone 1 leads to a mobilization of the portal glycogen deposits and to an increasing accumulation of glycogen in the peripheral part of the acinus. At the portally oriented border of the glycogen area a high synthetase activity leads to a broadening of the glycogen area in direction of the portal branches. At the end of this process the 'normal' pattern of the liver acinus occurs: all hepatocytes are filled with glycogen, the glycogen enzymes are restricted to the periportal border of zone 1. [ABSTRACT FROM AUTHOR]

A summary of the essential data system parameters for the Surveyor, Lunar Orbiter Pioneer, and Mariner projects is given in Table III. Because of the different mission objectives and basic design constraints, there is little correlation among the various projects and basic design constraints, there is little correlation among the various left to right, and Mariner probably represents the most sophisticated approach to data retrieval from deep space of the systems considered here. Three of the projects represent extremely successful data system designs, each of which has been proven on a considerable number of space missions. The Mariner 1969 spacecraft has yet to be launched, but the succcess of preceding Mariners affords some confidence in the basic design philosophy. The descriptions of the various data systems presented here are of necessity brief and do not include many of the technical details necessary to a full appreciation of their method of operation. However, the descriptions are intended only space flight practical examples of the applications of data systems design to deep space flight projects. For a better understanding of the technical problems involved and a fuller appreciation of the resourcefulness and ingenuity of the people who solved the problems, the reader os referred to the References. [ABSTRACT FROM AUTHOR]

Modern advances in science dictate the ever increasing need for a coordinated effort to solve the pressing problems of the formation and development of mental activity in normal and abnormal children. The sciences of psychology and defectology have already made substantial achievements in the realization of this principle in the study of mental processes and personality characteristics. Scientific studies by collectives under the direction of B. G. Anan'ev, A. V. Zaporozhets, A. N. [ABSTRACT FROM AUTHOR]

Methods for studying small groups are applied to theoretical questions derived from social psychology. Groups of five persons, of like sex and age, ranging from age five to twenty were studied over four separate sessions. The focus was on age-related developments in interpersonal dynamics, such as number of interaction participants, clique formation, inter- action forms, interaction sequence profiles, and within-session dynamics. Piagetian, social learning and symbolic interaction paradigms are used to interpret the findings. The evidence argues that negative and positive interpersonal actions differ in their effect on social adaptation, status and power differentiation increases with age, and that developmental stages are more complex than the Meadian and Piagetian traditions have suggested. Furthermore, the data suggest strong pressures towards homeostasis within interpersonal relationships, regardless of age. [ABSTRACT FROM AUTHOR]