Optical observation of preflashover phenomena from polytetrafluoroethylene in a planar concentric structure

2003 ◽  
Vol 93 (10) ◽  
pp. 6405-6407 ◽  
Author(s):  
Guan-Jun Zhang ◽  
Z. Yan ◽  
Y. S. Liu ◽  
K. Yasuoka ◽  
S. Ishii
Keyword(s):  
Optical Observation ◽  
Concentric Structure

First optical observation of Kossel diagrams in chiral smectic phases

1990 ◽  
Vol 51 (18) ◽  
pp. 2087-2099 ◽  
Author(s):  
H.-S. Kitzerow ◽  
G. Heppke ◽  
H. Schmid ◽  
B. Jérôme ◽  
P. Pieranski
Keyword(s):  
Optical Observation ◽  
Smectic Phases

The Concentric Structure of the Wisdom Poem in Job 28

2018 ◽  
Vol 9 (1) ◽  
pp. 26-45
Author(s):  
Ruth Henderson
Keyword(s):  
Ring Structure ◽  
Central Unit ◽  
Central Section ◽  
Book Of Job ◽  
Rhetorical Question ◽  
Linear Fashion ◽  
Creative Power ◽  
Concentric Pattern ◽  
Human Effort ◽  
Concentric Structure

The enigmatic wisdom poem of Job 28:1–28 stands apart from the rest of the book of Job in style and structure. Most read this poem in linear progression as three strophes (vv. 1–11; 15–19; 23–28) with an intervening refrain (vv. 12–14; 20–22). In this study, it is suggested that the poem has been presented in the form of a concentric or compositional ring structure, which juxtaposes arguments rather than presenting them in a linear fashion. According to this structure there are five compositional units, the centre of which holds the main point of the text (A, B, C, B1, A1). A central section (C vv. 15–19), maintains the traditional view of the supreme value of wisdom. The central unit is surrounded by two inner parallel sections each beginning with a rhetorical question concerning the location of wisdom (Sections B vv. 12–14 and B1 vv. 20–22), and two outer sections (A vv. 1–11 and A1 vv. 23–28) in which two contrasting ways of acquiring wisdom are presented: by independent human effort presented in the form of a mining metaphor (A vv. 1–11); or by contemplation of God’s omnipotent creative power and reverence for Him resulting in right behaviour (A1). Each of the major units also follows a concentric pattern.

Larval and juvenile development of the Iceland cockle Ciliatocardium ciliatum (Fabricius, 1780) (Bivalvia: Cardiidae)

2020 ◽  
Vol 324 (2) ◽  
pp. 242-251
Author(s):  
L.P. Flyachinskaya ◽  
P.A. Lezin
Keyword(s):  
Lateral Position ◽  
Larval Shell ◽  
Subtidal Zone ◽  
Larval Stages ◽  
Posterior Shoulder ◽  
Blade Shape ◽  
The Right ◽  
Lateral Structures ◽  
Juvenile Development ◽  
Concentric Structure

The paper considers the development of Ciliatocardium ciliatum from the stage of straight hinge to juvenile. In the White Sea the spawning of C. ciliatum begins at the end of June, larvae at different stages of development occur in plankton until the end of September. The earliest of the larvae found had shell lengths of 123–130 µm. The paper first examined the anatomy and structure of the larval shell of C. ciliatum. During the development, the main stages of organogenesis were described and special attention was paid to the formation of the digestive and muscular systems. The digestive system begins to function when the larva reaches a size of 170–180 µm. The digestive gland has a two-blade shape and is shifted to the right side. The foot is formed at a size of 230 µm, the gill rudiments appear when the larva reaches 270 µm. The development of the larval shell and larval hinge of the mollusc is considered in detail. The development of the larval shell of C. ciliatum is similar to the development of other family members. Throughout all the larval stages, the shell has a rounded shape with a low umbos, and the prodissoconch II has a clearly visible concentric structure. The C. ciliatum larval hinge is characterized by weak differentiation and the absence of pronounced cardinal teeth typical for other Cardiidae. However, the lateral structures of the castle – ridges and flanges – are well developed. The ligament begins to form at a size of 240–250 µm and occupies a lateral position. The settlement of the cockle takes place in September in the subtidal zone. After the metamorphosis, a large radial sculpture is formed on the dissoconch and a number of small spikes are formed at the rib of the posterior shoulder.

Mechanical Properties of Pyrolytic "SiOCN" Thin Coatings

1993 ◽  
Vol 308 ◽  
Author(s):  
Sandrine Bec ◽  
André Tonck ◽  
Jean-Luc Loubet
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
Young’S Modulus ◽  
Young's Modulus ◽  
Ceramic Coatings ◽  
Optical Observation ◽  
Thin Coatings ◽  
Polymer Precursors ◽  
Polymeric State

ABSTRACTPyrolysis of polymer precursors (polysilazane) is a technologically and economically interesting way to produce thin ceramic coatings. However, many cracks appear and decohesion occurs during pyrolysis when the ceramic coatings (SiOCN) are thicker than 0.5 micrometers. In order to understand these cracking phenomena, the coatings are mechanically characterized by nanoindentation at different stages of the pyrolysis heat treatment.During pyrolysis, the cracking temperature is detected by in-situ optical observation. The thickness of the coatings varies during pyrolysis from 3 micrometers at the polymeric state to 1 micrometer at the ceramic state. The coatings' properties, hardness and Young's modulus are evaluated after heat treatment, taking into account the substrate's influence. A large variation of these properties occurs at the cracking temperature. Both the hardness and the Young's modulus are multiplied by a factor of 10. By analysing these results, we show that cracking is correlated with the evolution of the coatings' mechanical properties during the transformation.

Optical observation of convective flow patterns in liquid helium

1996 ◽  
Vol 46 (S1) ◽  
pp. 85-86 ◽  
Author(s):  
Adam L. Woodcraft ◽  
Peter G. J. Lucas ◽  
Richard G. Matley ◽  
William Y. T. Wong
Keyword(s):  
Liquid Helium ◽  
Convective Flow ◽  
Flow Patterns ◽  
Optical Observation

The development of optical observation on cultured glial cell death

2009 ◽  
Vol 65 ◽  
pp. S226
Author(s):  
Keigo Aoki ◽  
Michio Horiuchi ◽  
Sachiko Yoshida
Keyword(s):  
Cell Death ◽  
Glial Cell ◽  
Optical Observation
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