scholarly journals Orientation direction dependency of cavitation in pre-oriented isotactic polypropylene at large strains

Soft Matter ◽  
2018 ◽  
Vol 14 (22) ◽  
pp. 4432-4444 ◽  
Author(s):  
Ying Lu ◽  
Glen Thompson ◽  
Dong Lyu ◽  
Philip Caton-Rose ◽  
Phil Coates ◽  
...  
Keyword(s):  
Isotactic Polypropylene ◽  
Large Strains ◽  
Orientation Direction ◽  
Main Factor

Failure of inter-fibrillar tie chains in oriented amorphous networks is the main factor controlling the cavitation initiated at large strains.

Cavitation in Isotactic Polypropylene at Large Strains during Tensile Deformation at Elevated Temperatures

2015 ◽  
Vol 48 (16) ◽  
pp. 5799-5806 ◽  
Author(s):  
Ying Lu ◽  
Yaotao Wang ◽  
Ran Chen ◽  
Jiayi Zhao ◽  
Zhiyong Jiang ◽  
...  
Keyword(s):  
Isotactic Polypropylene ◽  
Elevated Temperatures ◽  
Tensile Deformation ◽  
Large Strains

The mensuration of interfaces

1992 ◽  
Vol 50 (1) ◽  
pp. 216-217
Author(s):  
W.M. Stobbs
Keyword(s):  
Electron Microscopy ◽  
50Th Anniversary ◽  
Numerical Data ◽  
Industrial Applications ◽  
Dynamical Theory ◽  
Large Strains ◽  
Reasonable Approach ◽  
Lattice Resolution ◽  
Analogue To Digital ◽  
The Way

I do not have access to the abstracts of the first meeting of EMSA but at this, the 50th Anniversary meeting of the Electron Microscopy Society of America, I have an excuse to consider the historical origins of the approaches we take to the use of electron microscopy for the characterisation of materials. I have myself been actively involved in the use of TEM for the characterisation of heterogeneities for little more than half of that period. My own view is that it was between the 3rd International Meeting at London, and the 1956 Stockholm meeting, the first of the European series , that the foundations of the approaches we now take to the characterisation of a material using the TEM were laid down. (This was 10 years before I took dynamical theory to be etched in stone.) It was at the 1956 meeting that Menter showed lattice resolution images of sodium faujasite and Hirsch, Home and Whelan showed images of dislocations in the XlVth session on “metallography and other industrial applications”. I have always incidentally been delighted by the way the latter authors misinterpreted astonishingly clear thickness fringes in a beaten (”) foil of Al as being contrast due to “large strains”, an error which they corrected with admirable rapidity as the theory developed. At the London meeting the research described covered a broad range of approaches, including many that are only now being rediscovered as worth further effort: however such is the power of “the image” to persuade that the above two papers set trends which influence, perhaps too strongly, the approaches we take now. Menter was clear that the way the planes in his image tended to be curved was associated with the imaging conditions rather than with lattice strains, and yet it now seems to be common practice to assume that the dots in an “atomic resolution image” can faithfully represent the variations in atomic spacing at a localised defect. Even when the more reasonable approach is taken of matching the image details with a computed simulation for an assumed model, the non-uniqueness of the interpreted fit seems to be rather rarely appreciated. Hirsch et al., on the other hand, made a point of using their images to get numerical data on characteristics of the specimen they examined, such as its dislocation density, which would not be expected to be influenced by uncertainties in the contrast. Nonetheless the trends were set with microscope manufacturers producing higher and higher resolution microscopes, while the blind faith of the users in the image produced as being a near directly interpretable representation of reality seems to have increased rather than been generally questioned. But if we want to test structural models we need numbers and it is the analogue to digital conversion of the information in the image which is required.

Transition alpha structure in beta-isomorphous Nb-Hf alloys

1987 ◽  
Vol 45 ◽  
pp. 232-233
Author(s):  
R.W. Carpenter ◽  
Changhai Li ◽  
David J. Smith
Keyword(s):  
Solid Solution ◽  
Solution Phase ◽  
Miscibility Gap ◽  
Large Strains ◽  
Solid Solution Phase ◽  
Two Phase ◽  
Diffuse Intensity ◽  
Metastable Form ◽  
The Matrix ◽  
Equilibrium Morphology

Binary Nb-Hf alloys exhibit a wide bcc solid solution phase field at temperatures above the Hfα→ß transition (2023K) and a two phase bcc+hcp field at lower temperatures. The β solvus exhibits a small slope above about 1500K, suggesting the possible existence of a miscibility gap. An earlier investigation showed that two morphological forms of precipitate occur during the bcc→hcp transformation. The equilibrium morphology is rod-type with axes along <113> bcc. The crystallographic habit of the rod precipitate follows the Burgers relations: {110}||{0001}, <112> || <1010>. The earlier metastable form, transition α, occurs as thin discs with {100} habit. The {100} discs induce large strains in the matrix. Selected area diffraction examination of regions ∼2 microns in diameter containing many disc precipitates showed that, a diffuse intensity distribution whose symmetry resembled the distribution of equilibrium α Bragg spots was associated with the disc precipitate.

Role of Transcriptional Read-Through in PRE Activity in Drosophila melanogaster

Acta Naturae ◽  
2016 ◽  
Vol 8 (2) ◽  
pp. 79-86 ◽  
Author(s):  
P. V. Elizar’ev ◽  
D. V. Lomaev ◽  
D. A. Chetverina ◽  
P. G. Georgiev ◽  
M. M. Erokhin
Keyword(s):  
Dna Sequences ◽  
Cell Types ◽  
Transcription Terminator ◽  
Response Elements ◽  
Polycomb Response Elements ◽  
The Individual ◽  
Multicellular Organisms ◽  
Different Cell Types ◽  
Main Factor

Maintenance of the individual patterns of gene expression in different cell types is required for the differentiation and development of multicellular organisms. Expression of many genes is controlled by Polycomb (PcG) and Trithorax (TrxG) group proteins that act through association with chromatin. PcG/TrxG are assembled on the DNA sequences termed PREs (Polycomb Response Elements), the activity of which can be modulated and switched from repression to activation. In this study, we analyzed the influence of transcriptional read-through on PRE activity switch mediated by the yeast activator GAL4. We show that a transcription terminator inserted between the promoter and PRE doesnt prevent switching of PRE activity from repression to activation. We demonstrate that, independently of PRE orientation, high levels of transcription fail to dislodge PcG/TrxG proteins from PRE in the absence of a terminator. Thus, transcription is not the main factor required for PRE activity switch.

Right to contestation, patron-client networks, and corruption

2012 ◽  
pp. 101-117 ◽  
Author(s):  
P. Orekhovsky
Keyword(s):  
Open Access ◽  
Political Life ◽  
Limited Access ◽  
The Right ◽  
Main Factor

In the paper the nature of Russian corruption is considered along the lines proposed by D. North, J. Wallis, and B. Weingast. The author considers patron-client networks as basic political and economic actors of the limited access order. The redistributive rent allocated within patron-client networks is not a corruption phenomenon. The main factor that is able to destroy patron-client networks and autonomous centers of power is the right to contestation (liberalization) according to R. Dahl. Realization of that right together with the right to participate in political life enables transition to the open access society.

Educational Programs as the Element of Managing Corporate Knowledge

2006 ◽  
pp. 129-139
Author(s):  
V. Golubkin ◽  
S. Kalendzhyan ◽  
L. Kleyeva
Keyword(s):  
Educational Programs ◽  
Knowledge Circulation ◽  
Innovation Processes ◽  
Main Factor

The modern approaches and mechanisms of managing the organization knowledge being now the main factor of innovation processes are observed in the article. Functioning of such mechanisms is not simple and needs outsourcers in education and consulting. In order to make the management effective the interaction of the company with the outsourcer should sustain the process of permanent knowledge circulation.

Oxygen Regime of the Water Bodies as Main Factor of Different Metals Forms Migration within the System “Bottom Sediments - Water”

2009 ◽  
Vol 45 (2) ◽  
pp. 85-105 ◽  
Author(s):  
P. N. Linnik ◽  
O. V. Timchenko ◽  
A. V. Zubko ◽  
I. B. Zubenko ◽  
L. A. Malinovskaya
Keyword(s):  
Bottom Sediments ◽  
Water Bodies ◽  
Oxygen Regime ◽  
Main Factor

Superconducting Wind Generators with Capacities of 10 MW and Larger

2020 ◽  
Vol 10 (10) ◽  
pp. 59-67
Author(s):  
Victor N. ANTIPOV ◽  
◽  
Andrey D. GROZOV ◽  
Anna V. IVANOVA ◽  
◽  
...  
Keyword(s):  
High Temperature ◽  
Low Temperature ◽  
Wind Power ◽  
State Of The Art ◽  
Superconducting Materials ◽  
Commercial Application ◽  
Synchronous Generators ◽  
High Temperature Superconducting ◽  
Wind Generators ◽  
Main Factor

The overall dimensions and mass of wind power units with capacities larger than 10 MW can be improved and their cost can be decreased by developing and constructing superconducting synchronous generators. The article analyzes foreign conceptual designs of superconducting synchronous generators based on different principles: with the use of high- and low-temperature superconductivity, fully superconducting or only with a superconducting excitation system, and with the use of different materials (MgB2, Bi2223, YBCO). A high cost of superconducting materials is the main factor impeding commercial application of superconducting generators. In view of the state of the art in the technology for manufacturing superconductors and their cost, a conclusion is drawn, according to which a synchronous gearless superconducting wind generator with a capacity of 10 MW with the field winding made of a high-temperature superconducting material (MgB2, Bi-2223 or YBCO) with the «ferromagnetic stator — ferromagnetic rotor» topology, with the stator diameter equal to 7—9 m, and with the number of poles equal to 32—40 has prospects for its practical use in the nearest future.

HALIMA KHUDAYBERDIEVA POETRY MASTERY TO USE SYMBOLS AND IMAGES

2020 ◽  
Vol 3 (3) ◽  
pp. 49-52
Author(s):  
Mehrinoz Abbosova ◽  
Keyword(s):  
Deep Understanding ◽  
Artistic Representations ◽  
High Level ◽  
Main Factor

The article deals with the skill of using symbols and emblems in the poetry of the poetess Halima Khudaiberdieva. Poetry is one of the highest forms of art, and its perception requires a high level,high taste, deep understanding from the reader. The article lists important aspects of the requirements for an original poem. It is emphasized that the main factor of mystery in the poem are symbols and allusions. Some examples from the poems of the poet are given and analyzed. Through this, an attempt was made to explore the artistic representations of the poet’s poetry

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