Deflection of an infinitely large plate coupled to an elastic compound base

1972 ◽  
Vol 8 (1) ◽  
pp. 30-35
Author(s):  
Yu. M. Bardanov
Keyword(s):  
Large Plate ◽  
Elastic Compound

scholarly journals THE COMB FROM THE HAYMANOVA MOHYLA AND THE SCYTHIAN MYTH OF A HERO FIGHTING A DRAGON

2019 ◽  
Vol 31 (2) ◽  
pp. 483-492
Author(s):  
Yu. B. Polidovych
Keyword(s):  
General Context ◽  
Good Luck ◽  
Female Side ◽  
Ancient Greek ◽  
Large Plate ◽  
Male Side ◽  
Greek Art ◽  
Battle Scene

The article is devoted to the analysis of images on the bone comb from the Haymanova Mohyla mound (IV century BC). The images on it quite fully represent the myth of a Hero fighting a dragon, which is not known from narrative sources. The first large plate (the «male» side of the comb) depicts a battle scene with a consistently developing plot: the defeat of one hero — the triumph of the dragon — revenge and the victory of the second hero. It can be assumed that the characters in this scene are Targitaos and Kolaxais, known from the story of Herodotus. These Scythian heroes relate to Iranian Yima (Jamshid) and Θraētaona (Fereydun). The goddess is reproduced on the second large plate (the «female» side of the comb). Her iconographic image was borrowed from the ancient Greek Art, but it was perceived by the Scythians, probably as the goddess Api (Άπί), equivalent to the Iranian goddess Aredvi Sura Anahita. The general context of the images suggests that the Scythians were familiar with the Iranian prayers to this goddess with a request to bestow good luck in the fight against hostile creatures. The comb was certainly an important ritual and status attribute.

Fusion or hypertrophy?: the unusual arms of the Petalocrinidae (Ordovician-Devonian: Crinoidea)

2019 ◽  
Vol 93 (5) ◽  
pp. 966-970
Author(s):  
William I. Ausich ◽  
Yingyan Mao ◽  
Yue Li
Keyword(s):  
Light Microscopy ◽  
Crystallographic Orientation ◽  
Polarized Light ◽  
Polarized Light Microscopy ◽  
Distal Margin ◽  
Large Plate

AbstractUsing polarized light microscopy, the large, triangular or cylindrical second brachial plate of the Petalocrinidae is demonstrated to be a compound brachial formed through fusion of brachial plates along the distal margin of the growing arms. Based on the number of ambulacral bifurcations, brachials from the primibrachitaxis through at least the quintibrachitaxis may have been fused to form this large plate. In Petalocrinus, fused brachials form a second brachial that assumed the same crystallographic orientation, but in Spirocrinus, multidirectional extinctions preserve some of the original multiplate arrangement.

scholarly journals Impact of a disinfecting technique on microbial contamination of computer keyboards and telephone handsets

2013 ◽  
Vol 2 (4) ◽  
pp. 1 ◽  
Author(s):  
Gabriele Messina ◽  
Emma Ceriale ◽  
Sandra Burgassi ◽  
Carmela Russo ◽  
Chiara Defranceschi ◽  
...  
Keyword(s):  
Microbial Contamination ◽  
Bacterial Count ◽  
Total Bacterial Count ◽  
Local Health ◽  
Signed Rank ◽  
Colony Forming Units ◽  
Before And After ◽  
Health Care Associated Infections ◽  
Elastic Compound ◽  
Bacteria And Fungi

Background: Computers and telephones are ubiquitous in the hospital and have been shown to be contaminated with potentially pathogenic microorganism. The aim of the study was to determine microbial contamination on computer keyboards and telephone handsets and the effectiveness of a disinfecting technique (DT). Methods: A matched cross-over study, involving an overall of 50 computer keyboards and 50 telephone handsets, was conducted in three hospitals, located in the Local Health Area of Siena (Italy) before and after the use of an innovative DT consisting of a malleable-elastic compound, containing ethanol, which adheres to surfaces, removes dirt and disinfects. Total bacterial count was evaluated and several types of bacteria and fungi were researched pre- and post- use of the DT. Non parametric tests: Wilcoxon signed rank and Mann Whitney, were used, when appropriate. Results: The DT was effective in disinfecting the objects. In fact, Colony-Forming Units (CFUs) decreased to zero in most comparisons. All the comparisons showed significant differences (p<0.001) after the DT, both for computer keyboards and telephone handsets. The only exception was found for molds in telephones (p=0.062). Keyboards emerged to be dirtier than telephones handsets (p<0.05) for several types of bacteria. Conclusions: The data suggest that microbial contamination of keyboards and telephones is considerable. These objects can be a vehicle for Health Care-Associated Infections HAIs and their disinfection should not be neglected. The DT showed to be appropriate for the disinfecting purpose.

A new parallelism acceptance criterion for validating large plate bioassay results

1986 ◽  
Vol 14 (3) ◽  
pp. 249-254 ◽  
Author(s):  
Michael J. Story ◽  
Julie A. Winson ◽  
Preston L. Beyer ◽  
Garth Boehm
Keyword(s):  
Large Plate ◽  
Acceptance Criterion

The Effect of a Quarter-Circle Corner Crack on the Distribution of the SIF Along the Front of a Non-Aligned Semi-Elliptical Surface Crack in an Infinitely Large Plate Under Uniaxial Tension

2017 ◽  
Author(s):  
C. Levy ◽  
M. Perl ◽  
Q. Ma
Keyword(s):  
Surface Crack ◽  
Mutual Effect ◽  
Engineering Practice ◽  
Multiple Cracks ◽  
Corner Crack ◽  
Large Plate ◽  
Service Community ◽  
Parallel Cracks ◽  
Embedded Crack ◽  
Non Destructive

The evaluation of the mutual effect of non-aligned multiple cracks is a prerequisite in applying fitness-for-service codes. For non-aligned parallel cracks, during on-site inspection, one needs to decide whether the cracks should be treated as coalesced or separate multiple cracks for Fitness-for-Service. In the existing literature, criteria and standards for the adjustment of multiple nonaligned cracks are very source dependent, and those criteria and standards are often derived from on-site service experience without rigorous and systematic verification. Based on this observation, the authors previously reported on the influence of an embedded crack on an edge crack in 2-D scenarios and, more recently, in 3-D scenarios of the influence of a surface crack on a quarter-circle corner crack. However, realistic crack configurations detected using non-destructive methods are generally 3-D in nature and their influences are mutual. Thus the SIF distribution characteristics along the surface crack is equally important as the SIF distribution of the corner crack when Fitness-for-Service rules are to be applied. Therefore, non-aligned flaws with different configurations and shapes and the SIFs along their crack fronts are deemed necessary in order to obtain more practical guidance in the usage of rules speculated in Fitness-for-Service codes. In this study, the characteristics of the SIF distribution along a semi-elliptic non-aligned surface crack is examined under the influence of a quarter-circle corner crack of various geometries in an infinitely large plate. For any given geometry of a quarter-circle corner crack, a pair of horizontal (H) and vertical (S) separation distances between the two cracks is chosen followed by a detailed analysis of the effect of the quarter-circle corner crack on the 3D SIFs of the surface crack at different ellipticities. The analysis is repeated for various combinations of separation distances S and H. The results from this study are collectively significant to the understanding of the correlation between the criteria and standards in Fitness-for-Service community and the consequence of their usage in engineering practice.

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