scholarly journals RADIATION TREATMENT OF THE STOMACH CARCINOMA. FROM SCIENTIFIC RESEARCH TO PRACTICE

2018 ◽  
Vol 17 (3) ◽  
Author(s):  
R. V. Senyutovich ◽  
O. I. Ivashchuk ◽  
O. I. Ivashchuk ◽  
V. Yu. Bodyaka ◽  
V. Yu. Bodyaka ◽  
...  
2007 ◽  
Vol 24 (2) ◽  
pp. 132
Author(s):  
Lucy Morgan ◽  
Ellen Pilon ◽  
Brett Reynolds

Reviews of: 'Bridge to the Classroom: ESL Cases for Teacher Exploration,' Volumes I-III with Teacher's Guide, Volumes I and II by Joy Egbert, Volume III by Joy Egbert and Gina Mikel Petrie; 'Oxford Basics: Activities Using Resources,' by Heather Westrup and Joanna Baker; and 'Teaching and Learning Vocabulary: Bringing Scientific Research to Practice,' by Elfrieda H. Hiebert and Michael L. Kamil (Eds.)


1966 ◽  
Vol 24 ◽  
pp. 188-189
Author(s):  
T. J. Deeming

If we make a set of measurements, such as narrow-band or multicolour photo-electric measurements, which are designed to improve a scheme of classification, and in particular if they are designed to extend the number of dimensions of classification, i.e. the number of classification parameters, then some important problems of analytical procedure arise. First, it is important not to reproduce the errors of the classification scheme which we are trying to improve. Second, when trying to extend the number of dimensions of classification we have little or nothing with which to test the validity of the new parameters.Problems similar to these have occurred in other areas of scientific research (notably psychology and education) and the branch of Statistics called Multivariate Analysis has been developed to deal with them. The techniques of this subject are largely unknown to astronomers, but, if carefully applied, they should at the very least ensure that the astronomer gets the maximum amount of information out of his data and does not waste his time looking for information which is not there. More optimistically, these techniques are potentially capable of indicating the number of classification parameters necessary and giving specific formulas for computing them, as well as pinpointing those particular measurements which are most crucial for determining the classification parameters.


Author(s):  
S. Phyllis Steamer ◽  
Rosemarie L. Devine

The importance of radiation damage to the skin and its vasculature was recognized by the early radiologists. In more recent studies, vascular effects were shown to involve the endothelium as well as the surrounding connective tissue. Microvascular changes in the mouse pinna were studied in vivo and recorded photographically over a period of 12-18 months. Radiation treatment at 110 days of age was total body exposure to either 240 rad fission neutrons or 855 rad 60Co gamma rays. After in vivo observations in control and irradiated mice, animals were sacrificed for examination of changes in vascular fine structure. Vessels were selected from regions of specific interest that had been identified on photomicrographs. Prominent ultrastructural changes can be attributed to aging as well as to radiation treatment. Of principal concern were determinations of ultrastructural changes associated with venous dilatations, segmental arterial stenosis and tortuosities of both veins and arteries, effects that had been identified on the basis of light microscopic observations. Tortuosities and irregularly dilated vein segments were related to both aging and radiation changes but arterial stenosis was observed only in irradiated animals.


Author(s):  
Judy Ju-Hu Chiang ◽  
Robert Kuo-Cheng Chen

Germ cells from the rice stem borer Chilo suppresalis, were examined by light and electron microscopy. Damages to organelles within the germ cells were observed. The mitochondria, which provide the cell with metabolic energy, were seen to disintegrate within the germ cell. Lysosomes within the germ cell were also seen to disintegrate. The subsequent release of hydrolytic enzymesmay be responsible for the destruction of organelles within the germ cell. Insect spermatozoa were seen to lose the ability to move because of radiation treatment. Damage to the centrioles, one of which is in contact with the tail, may be involved in causing sperm immobility.


2019 ◽  
Vol 35 (5) ◽  
pp. 737-750 ◽  
Author(s):  
Christopher Gess ◽  
Christoph Geiger ◽  
Matthias Ziegler

Abstract. Although the development of research competency is an important goal of higher education in social sciences, instruments to measure this outcome often depend on the students’ self-ratings. To provide empirical evidence for the utility of a newly developed instrument for the objective measurement of social-scientific research competency, two validation studies across two independent samples were conducted. Study 1 ( n = 675) provided evidence for unidimensionality, expected differences in test scores between differently advanced groups of students as well as incremental validities over and above self-perceived research self-efficacy. In Study 2 ( n = 82) it was demonstrated that the competency measured indeed is social-scientific and relations to facets of fluid and crystallized intelligence were analyzed. Overall, the results indicate that the test scores reflected a trainable, social-scientific, knowledge-related construct relevant to research performance. These are promising results for the application of the instrument in the evaluation of research education courses in higher education.


1978 ◽  
Vol 23 (5) ◽  
pp. 356-358
Author(s):  
ALCINE POTTS LUKENBACH
Keyword(s):  

Author(s):  
Lisa Towne ◽  
◽  
Lauress L. Wise ◽  
Tina M. Winters

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