Characteristic Features in the Collision of Chemical Waves Depending on the Aspect Ratio of a Rectangular Field

Experimental results are presented to show the development of the flow past a cylinder in a rotating stratified fluid. Both transient and fully developed flow states are investigated, for a range of values of Rossby number Ro and Burger number Bu and for full depth and truncated obstacles. The fully developed flows are shown to be of three main types, delineated respectively as attached eddy pairs, transitional, and vortex wakes, with the boundaries between each flow type being determined by the values of the Reynolds number, the Burger number, the aspect ratio and the ratio of the height of the obstacle to the depth of the fluid. For cases of homogeneous fluid flow, the critical Rossby and Reynolds numbers for vortex shedding are significantly lower than the values found by Boyer. The discrepancy is ascribed to aspect ratio effects and differences in the cylinder shear layer structures in the two studies. The weakening effects of density stratification upon characteristic features of rapidly rotating homogeneous flows are seen to be two-fold: firstly, the wake asymmetries associated with the unstratified flows are seen to be destroyed by the stratification, and, secondly, the retention times of starting eddies, the eddy growth times and the isolated eddy formation times are shown to no longer tune with the background rotation timescale but to scale with the advective timescale of the motion and the aspect ratio of the cylinder. Cross-stream velocity profiles taken at several downstream stations in the wake of the cylinder are used to show a linear increase in the momentum flux coefficient with increasing Re , in the range 55 < Re < 135. Velocity profile measurements taken above and downstream of the truncated mcylinder are presented. These show that the vertical distance over which the upper level fluid is influenced by the presence of the obstacle depends strongly upon the value of Bu , and is typically one-tenth of the obstacle height at the highest values of Bu . Finally, flow visualization studies of the motion in the vertical shear layers for Bu = 0 are compared and contrasted with other similar observations, and with theoretical understandings of the flow structure. The importance of the upper boundary condition is clarified.

Ultrastructural modification of cellular interactions in cancer tumor

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100082455 ◽

1978 ◽

Vol 36 (2) ◽

pp. 318-319

Author(s):

N. P. Dmitrieva

Keyword(s):

Cancer Cells ◽

Human Thyroid ◽

Adjacent Cell ◽

Main Role ◽

Cellular Interactions ◽

Electron Microscopic ◽

Cancer Tumor ◽

Normal Human ◽

Characteristic Features

One of the most characteristic features of cancer cells is their ability to metastasia. It is suggested that the modifications of the structure and properties of cancer cells surfaces play the main role in this process. The present work was aimed at finding out what ultrastructural features apear in tumor in vivo which removal of individual cancer cells from the cell population can provide. For this purpose the cellular interactions in the normal human thyroid and cancer tumor of this gland electron microscopic were studied. The tissues were fixed in osmium tetroxide and were embedded in Araldite-Epon.In normal human thyroid the most common type of intercellular contacts was represented by simple junction formed by the parallelalignment of adjacent cell membranees leaving in between an intermembranes space 15-20 nm filled with electronlucid material (Fig. 1a). Sometimes in the basal part of cells dilatations of the intercellular space 40-50 nm wide were found (Fig. 1a). Here the cell surfaces may form single short microvilli.

Development of 200kV ultrahigh-resolution analytical electron microscope

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100152513 ◽

1989 ◽

Vol 47 ◽

pp. 108-109

Author(s):

T. Kaneyama ◽

M. Naruse ◽

Y. Ishida ◽

M. Kersker

Keyword(s):

Electron Microscope ◽

Optical Constants ◽

Materials Science ◽

Objective Lens ◽

The Finite Element Method ◽

Ultrahigh Resolution ◽

Analytical Electron ◽

Analytical Electron Microscope ◽

Characteristic Features ◽

Better Than

In the field of materials science, the importance of the ultrahigh resolution analytical electron microscope (UHRAEM) is increasing. A new UHRAEM which provides a resolution of better than 0.2 nm and allows analysis of a few nm areas has been developed. [Fig. 1 shows the external view] The followings are some characteristic features of the UHRAEM.Objective lens (OL)Two types of OL polepieces (URP for ±10' specimen tilt and ARP for ±30' tilt) have been developed. The optical constants shown in the table on the next page are figures calculated by the finite element method. However, Cs was experimentally confirmed by two methods (namely, Beam Tilt method and Krivanek method) as 0.45 ∼ 0.50 mm for URP and as 0.9 ∼ 1.0 mm for ARP, respectively. Fig. 2 shows an optical diffractogram obtained from a micrograph of amorphous carbon with URP under the Scherzer defocus condition. It demonstrates a resolution of 0.19 nm and a Cs smaller than 0.5 mm.

Perceptual and Emotional Responses as a Function of Film Aspect Ratio as Viewed on a Television Screen

PsycEXTRA Dataset ◽

10.1037/e413782005-390 ◽

1999 ◽

Author(s):

Norman G. Gordon ◽

Michael J. Johnson

Keyword(s):

Aspect Ratio ◽

Emotional Responses ◽

Television Screen

Modification of MnS inclusion by tellurium in 38MnVS6 micro-alloyed steel

Metallurgical Research & Technology ◽

10.1051/metal/2020066 ◽

2020 ◽

Vol 117 (6) ◽

pp. 615

Author(s):

Ping Shen ◽

Lei Zhou ◽

Qiankun Yang ◽

Zhiqi Zeng ◽

Kenan Ai ◽

...

Keyword(s):

Fatigue Life ◽

Aspect Ratio ◽

Strong Influence ◽

Experimental Results ◽

Alloyed Steel ◽

Equivalent Diameter ◽

Small Aspect Ratio ◽

Steel Quality ◽

Eds Analysis ◽

Micro Alloyed Steel

In 38MnVS6 steel, the morphology of sulfide inclusion has a strong influence on the fatigue life and machinability of the steel. In most cases, the MnS inclusions show strip morphology after rolling, which significantly affects the steel quality. Usually, the MnS inclusion with a spherical morphology is the best morphology for the steel quality. In the present work, tellurium was applied to 38MnVS6 micro-alloyed steel to control the MnS inclusion. Trace tellurium was added into 38MnVS6 steel and the effect of Te on the morphology, composition, size and distribution of MnS inclusions were investigated. Experimental results show that with the increase of Te content, the equivalent diameter and the aspect ratio of inclusion decrease strikingly, and the number of inclusions with small aspect ratio increases. The inclusions are dissociated and spherized. The SEM-EDS analysis indicates that the trace Te mainly dissolves in MnS inclusion. Once the MnS is saturated with Te, MnTe starts to generate and wraps MnS. The critical Te/S value for the formation of MnTe in the 38MnV6 steel is determined to be approximately 0.075. With the increase of Te/S ratio, the aspect ratio of MnS inclusion decreases and gradually reaches a constant level. The Te/S value in the 38MnVS6 steel corresponding to the change of aspect ratio from decreasing to constant ranges from 0.096 to 0.255. This is most likely to be caused by the saturation of Te in the MnS inclusion. After adding Te in the steel, rod-like MnS inclusion is modified to small inclusion and the smaller the MnS inclusion, the lower the aspect ratio.

Tolerance is theoretical and practical principles

Ukrainian Religious Studies ◽

10.32420/1996.4.69 ◽

1996 ◽

pp. 13-23

Author(s):

Mykhailo Babiy

Keyword(s):

Religious Diversity ◽

The Other ◽

Nodal Points ◽

Characteristic Features ◽

The One ◽

Ukrainian Society

Political ideological pluralism, religious diversity are characteristic features of modern Ukrainian society. On the one hand, multiculturalism, socio-political, religious differentiation of the latter appear as important characteristics of its democracy, as a practical expression of freedom, on the other - as a factor that led to the deconsocialization of society, gave rise to "nodal points" of tension, confrontational processes, in particular, in political and religious spheres.

Hard and light gamification in education: Which one to choose?

Informatics and Education ◽

10.32517/0234-0453-2020-35-1-20-27 ◽

2020 ◽

Vol 1 (1) ◽

pp. 20-27

Author(s):

E. V. Karmanova ◽

V. A. Shelemetyeva

Keyword(s):

Computer Games ◽

Educational Process ◽

Course Development ◽

Learning Technology ◽

Training Course ◽

Resource Requirements ◽

E Learning ◽

Characteristic Features ◽

Game Elements

The article is devoted to the implementation of gamification methods in the educational process. The characteristic features of light and hard gamification are presented. The appropriateness of using gamification when applying e-learning technology is considered. Classification of courses based on hard gamification taking into account the technological features of development is proposed: courses-presentations, courses — computer games, VR/AR courses. The article also illustrates the use of various game elements of easy gamification using the example of the module “Level up! — Gamification” of the Moodle LMS. The capabilities of this module can be used in an electronic course by any teacher who has the skills of working with the Moodle.The authors present the analysis of the development of a training course in sales techniques using hard and light gamification technologies, where the course development was assessed for its complexity, manufacturability, and resource requirements. The results of the analysis showed that the development of courses using hard gamification requires much more financial and time-consuming than the development of courses using light gamification.The article evaluates the results of the educational intensiveness intense “Island 10–22”, held in July 2019 in Skolkovo, in which 100 university teams, teams of research and educational centers, teams of schoolchildren — winners of competitions, olympiads, hackathons (“Young Talents”) participated. The results of the intense confirmed the effectiveness of the use of light gamification methods in adult training. Thus, the conclusions presented in the article reveal a number of advantages that light gamification has in comparison with hard gamification.

Budget as an Instrument of Reproduction of Bureaucracy in Russia

Voprosy Ekonomiki ◽

10.32609/0042-8736-2006-5-87-96 ◽

2006 ◽

pp. 87-96

Author(s):

Yu. Shvetsov

Keyword(s):

The State ◽

Economic Consequences ◽

Material Base ◽

Characteristic Features

The article considers the problem of bureaucratisation of the state and the most important social and economic consequences of this phenomenon. The essence of bureaucracy has been revealed, characteristic features of its functioning in Russia have been analyzed; the material base of bureaucracy and its dominating status in the society have been substantiated. The conclusion has been made that the process of changing the role of the budget to serve the interests of bureaucracy is being accomplished.

PENINGKATAN KEMAMPUAN GURU BAHASA INDONESIA DALAM MENYUSUN RENCANA PROGRAM PEMBELAJARAN (RPP) SDN 015 PAGARAN TAPAH DARUSSALAM MELALUI METODE PEMBERIAN TUGAS

Primary: Jurnal Pendidikan Guru Sekolah Dasar ◽

10.33578/jpfkip.v5i3.3956 ◽

2017 ◽

Vol 5 (3) ◽

pp. 713

Author(s):

Mukhlis '

Keyword(s):

Aspect Ratio ◽

Duty Cycle ◽

Lesson Plans ◽

Learning Program ◽

School Subjects ◽

Bahasa Indonesia

Based on the observation of some teachers found the symptoms as follows: the lack of abilityof Indonesian teachers in designing learning program (RPP), the learning device is only usedas a supplement and not to the needs of teaching, most teachers again if asked the lessonanswered not have or has not been made. The purpose of this research is to improve theability of Indonesian teachers in designing learning program (RPP) at SDN 015 PagaranTapah Darussalam through the method of administration tasks. This type of research is actionresearch school. Subjects in this study were teachers Indonesian as many as 12 people. Basedon the analysis and discussion can be concluded that the method of administration tasks canimprove the ability of Indonesian teachers in making learning device in SDN 015 PagaranTapah Darussalam through the method of administration tasks. Under these conditions, thelevel of acceptance of teachers increased. The aspect ratio capability Indonesian teachers inpreparing lesson plans through the provision of duty cycle I and II of the increase from 56%and the second cycle to 79%.

Facial aspect ratio and the split face photo

International Society of Hair Restoration Surgery ◽

10.33589/23.6.0206 ◽

2013 ◽

Vol 23 (6) ◽

pp. 206-207

Author(s):

Bradley R. Wolf

Keyword(s):

Aspect Ratio ◽

Split Face