Probable nature of Chizhevsky’s "Z-factor" on example of a rare solar event

2016 ◽  
Author(s):  
A. S. Borodin ◽  
D. A. Tuzhilkin ◽  
E. S. Baklykova
Keyword(s):  
Solar Event ◽  
Probable Nature

scholarly journals “Probable Nature of the Internal Symmetry of Crystals”

Nature ◽  
1884 ◽  
Vol 29 (747) ◽  
pp. 383-384 ◽  
Author(s):  
L. SOHNCKE
Keyword(s):  
Internal Symmetry ◽  
Probable Nature

scholarly journals THE PROBABLE NATURE OF THE INFECTIOUS AGENT OF TRACHOMA

1937 ◽  
Vol 65 (5) ◽  
pp. 735-755 ◽  
Author(s):  
L. A. Julianelle ◽  
R. W. Harrison ◽  
M. C. Morris
Keyword(s):  
Tissue Culture ◽  
Gentian Violet ◽  
Infectious Agent ◽  
Heat Inactivation ◽  
Time Interval ◽  
General Observation ◽  
Specific Reaction ◽  
Rare Occasion ◽  
Probable Nature ◽  
The Brain

1. The infectious agent of trachoma can be freed from extraneous bacteria by passage through rabbit testicle. 2. The infectious agent multiplies little, if at all, during such passage, but in many instances retains its infectivity undiminished. 3. No specific changes occur in the rabbit testicle incidentally to the passage. 4. On rare occasion the trachoma agent may be freed from bacteria by intracerebral passage. The brain tissues show no specific reaction. 5. Filtration experiments with Seitz, Kramer, Berkefeld, and Elford filters confirm the general observation that the infectious agent is filterable with difficulty. 6. Tissue culture experiments, with tissues containing the infectious agent (conjunctiva, rabbit testicle, brain, etc.), conducted under a wide variety of conditions, proved uniformly unsuccessful in the cultivation of the agent. 7. The agent is inactivated by bile, AgNO3, phenol, cocaine, tartar emetic, and gentian violet. Its heat inactivation temperature is between 45° and 50°C., at a time interval of 15 minutes. 8. Attempts to preserve the infectious agent in glycerine were unsuccessful. 9. The accumulated evidence suggests that the infectious agent of trachoma is a virus.

Memoirs: The Cytopasmic Inclusion of the Germ-Cells

1917 ◽  
Vol s2-62 (247) ◽  
pp. 407-463
Author(s):  
J. BRONTÉ GATENBY
Keyword(s):  
Germ Cell ◽  
Primordial Germ Cell ◽  
Growth Period ◽  
Pieris Brassicae ◽  
Constant Factor ◽  
Cytoplasmic Bodies ◽  
Female Germ Cell ◽  
Probable Nature ◽  
And Function ◽  
Definite Period

(1) In Smerinthus populi, Pieris brassicæ, and a number of other species of moths and butterflies the cytoplasmic bodies have been followed out. (2) The micromitosome lias been followed from the spermatocyte back into the secondary spermatogonium. It is very probably present in the primordial germ-cell. (3) The micromitosome has been definitely found in the female. (4) The micromitosome seems to divide in all divisions, and I consider that it is a constant factor in the spermatids of Smerinthus. (5) The probable nature and function of the micromitosome is discussed. (6) The mitochondria have been carefully examined in the male and female germ-cell in all stages except in the maturation division of the female and in fertilisation. (7) It has been shown that in early stages the cytoplasmic bodies of the female resemble those of the male. (8) There is a definite period, judged to be about the beginning of growth stage, when the subsequent fate of the mitochondria in the male becomes different from that of the female. (9) The remarkable formation of chromophobe and chromophile zones in the male mitochondrial body aud the use of these zones are described. (10) The formation of the macromitosome from the mitochondria is described. (11) The changes undergone by the macromitosome in sperm formation are followed out. (12) The presence of the acroblasts in the fairly early growth period of the spermatocyte is described. (13) The complicated evolutions of these bodies in division of the cells, their subsequent fate and' their probable nature are discussed. (14) The staining and fixing reactions of the cytoplasmic bodies are fully described. (15) A number of abnormalities have been described. (16) The centrosome has been shown to divide in the young spermatid, and one centrosome is probably lost, but definite evidence is not forthcoming.

On the Impact Behavior of a Material With a Yield Point

1949 ◽  
Vol 16 (1) ◽  
pp. 39-52
Author(s):  
Merit P. White
Keyword(s):  
Yield Stress ◽  
Yield Point ◽  
Impact Behavior ◽  
Longitudinal Impact ◽  
Stress Strain ◽  
California Institute Of Technology ◽  
Static Yield ◽  
Institute Of Technology ◽  
Probable Nature ◽  
The Impact

Abstract An analysis of longitudinal impact tests that were made by Drs. D. S. Clark and P. E. Duwez at the California Institute of Technology on an iron and a steel with definite yield points is described. From this analysis is deduced the probable nature of the dynamic stress-strain relations for such materials. These appear to differ greatly from the static stress-strain relations, unlike the case for materials without yield points. As pointed out by Duwez and Clark, the upper yield stress for undeformed material is several times as great under impact as the static yield stress. The present analysis indicates that under impact, the material with a definite yield point is made harder at a given deformation, and ruptures at a higher (engineering) stress and smaller strain than when loaded statically. The critical impact velocity, defined as that at which nearly instantaneous failure occurs in tension, is discussed, and the factors upon which it depends are given.

scholarly journals Probable Nature of the Internal Symmetry of Crystals 1

Nature ◽  
1883 ◽  
Vol 29 (739) ◽  
pp. 205-207 ◽  
Author(s):  
WILLIAM BARLOW
Keyword(s):  
Internal Symmetry ◽  
Probable Nature

scholarly journals A Rationale for Using Sonoelastography in Thyroid Nodular Pathology

2019 ◽  
Vol 100 (5) ◽  
pp. 242-246
Author(s):  
L. A. Timofeeva ◽  
L. B. Shubin
Keyword(s):  
Thyroid Cancer ◽  
Roc Analysis ◽  
Thyroid Nodules ◽  
Area Under The Curve ◽  
Predictive Ability ◽  
Tissue Elasticity ◽  
Stromal Component ◽  
Collagen Level ◽  
Probable Nature ◽  
Benign Nodules

Objective. To provide a rationale for using sonoelastography (SEG) in the differential diagnosis of thyroid cancer (TC).Material and methods. Thirty patients with thyroid nodules of various morphological structures were examined. The authors studied the data of SEG and immunohistochemistry (IHC) with monoclonal antibodies against types III and IV collagen (they evaluated the degree of the expressed collagen fibers). Analysis of variance, ROC analysis, and logistic regression were used (by comparing with the expression of collagens) to assess the predictive ability of ultrasound.Results. The study showed that irregular and uneven contours, microcalcifications, and “the height greater than the width” were most significant among the ultrasound signs in the diagnosis of TC. Cool colors prevailed when performing SEG in the pattern of thyroid cancer. Purple-blue hues were predominantly recorded (p<0.05 with regard to benign nodules), green ones were less frequently. ROC analysis of compression elastography showed that the area under the curve was 0.785 (95% CI 0.740-0.826), sensitivity 78.1%, specificity 79.0%. Comparison of the data of IHC and SEG revealed a direct correlation of tissue elasticity with the degree of a stromal component and with the presence of collagen-containing structures.Conclusion. SEG may suppose the probable nature of thyroid nodules on the basis of their morphological features. The low degree of the stromal component and the low content of types III and IV collagen make follicular colloid goiter and adenoma soft, which is recorded at SEG. TC is characterized by a high collagen level attributable to the characteristics of the metabolism of cancer cells, which makes them solid in the mode of SEG.

scholarly journals Activist's table tennis activity as a programming object

2021 ◽  
pp. 101-105
Author(s):  
Roman Stasyuk ◽  
Yurii Ostapenko ◽  
Eleanora Simbirska
Keyword(s):  
Table Tennis ◽  
Sports Training ◽  
Logical Scheme ◽  
Tennis Players ◽  
Programmed Learning ◽  
Stage Of Development ◽  
Game Activity ◽  
Motor Problems ◽  
Preparatory Stage ◽  
Probable Nature

The article considers the issue of improving the system of sports training of players in table tennis on the basis of the principle of programmed learning, which is implemented in the form of a comprehensive method of training process. Programmed training in sports training of table tennis players at the preparatory stage is optimized using a system of tools and methods built in the form of a structural-logical scheme is an important area of research. Methodological ways of building a system of sports training of table tennis players on the basis of the method of programmed learning are revealed, which made it possible to determine the principles of building target tasks, which are a certain block of physical exercises structured with a single goal setting. It was necessary to summarize the experience of modern methods of organization for the construction of programmed training in sports training of table tennis players by implementing the principles of complexity and coherence of training activities. At the present stage of development of game sports fundamental knowledge of the content of game, systems of preparation, various, flexible and highly automated skills and perfect activity of functional systems of an organism is especially necessary. Difficulties that turn out to be unpredictable by a program of tactical actions are usually related to informative influences. This is due to the probable nature of the game activity, which, first of all, concerns the information aspect. Despite a certain number of standard game actions, which were mentioned above, the actions of athletes who play sports are based on the response to changes in the situation, the conditions of wrestling. With such a variety of forms of manifestations of the player's actions are constantly associated with the solution of situational motor problems that require the use of programming mechanisms.

scholarly journals Forecasting Solar Energetic Particle Events and Associated False Alarms

2017 ◽  
Vol 13 (S335) ◽  
pp. 324-327
Author(s):  
Bill Swalwell ◽  
Silvia Dalla ◽  
Robert Walsh
Keyword(s):  
Energetic Particle ◽  
Solar Energetic Particle ◽  
High Energy ◽  
False Alarms ◽  
Solar Event ◽  
Solar Energetic Particle Events ◽  
Two Factors ◽  
Very High Energy ◽  
Solar Events ◽  
Very High

AbstractBecause of the significant dangers they pose, accurate forecasting of Solar Energetic Particle (SEP) events is vital. Whilst it has long been known that SEP-production is associated with high-energy solar events, forecasting algorithms based upon the observation of these types of solar event suffer from high false alarm rates. Here we analyse the parameters of 4 very high energy solar events which were false alarms, with a view to reaching an understanding as to why SEPs were not detected at Earth. We find that in each case at least two factors were present which have been shown to be detrimental to SEP production.

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