Influence of preliminary deformation and the production factor on the spalling strength of 12Kh18N10T steel

1988 ◽  
Vol 20 (7) ◽  
pp. 915-918
Author(s):  
V. A. Ogorodnikov ◽  
E. S. Tyun'kin ◽  
A. G. Ivanov
Keyword(s):  
12Kh18n10t Steel ◽  
Production Factor ◽  
Preliminary Deformation ◽  
Spalling Strength

Oil Prices: Limits to Growth and the Depth of Falling

2006 ◽  
pp. 28-41 ◽  
Author(s):  
I. Bashmakov
Keyword(s):  
Energy Demand ◽  
Negative Relationship ◽  
Oil Prices ◽  
Production Factor ◽  
Energy Costs ◽  
Purchasing Power ◽  
Limits To Growth ◽  
Technological Basis ◽  
Production Factors ◽  
Output Ratio

This article deals with the determination of future oil prices. The approach used is based on the evaluation of purchasing power limits and allows to put the limits to monopolistic price setting. Several important findings are formulated: going beyond the upper thresholds of purchasing power stipulates negative relationship between energy costs and GDP growth rates, and this brings the dynamics to energy demand to price elasticity. This approach is also based on what the author calls the economics of constants and variables, i.e. on the existence of very stable macroeconomic proportions, which may be observed throughout the whole period of statistical observations (over 200 years). It provides grounds for two conclusions. First, the upper limit of energy costs to the gross output ratio is determined by the least acceptable profitability. Second, the theoretical postulate on substantial production factors substitution used in the production functions theory may be incorrect. In reality, the change of the economy technological basis leads to the substitution of low quality production factor by the same factor with a higher quality. Application of this approach brings the basis for predicting oil prices for 2006-2008.

Comparative assessment of morphological mechanisms of maintaining structural liver homeostasis in the dynamics of exposure to coal-rock dust and sodium fluoride on the body

2020 ◽  
pp. 189-194
Author(s):  
M. S. Bugaeva ◽  
O. I. Bondarev ◽  
N. N. Mikhailova ◽  
L. G. Gorokhova
Keyword(s):  
Sodium Fluoride ◽  
Morphological Changes ◽  
The Body ◽  
System Level ◽  
Production Factor ◽  
Coal Rock ◽  
The Impact ◽  
Structural Homeostasis ◽  
Rock Dust

Introduction. The impact on the body of such factors of the production environment as coal-rock dust and fluorine compounds leads to certain shift s in strict indicators of homeostasis at the system level. Maintaining the relative constancy of the internal environment of the body is provided by the functional consistency of all organs and systems, the leading of which is the liver. Organ repair plays a crucial role in restoring the structure of genetic material and maintaining normal cell viability. When this mechanism is damaged, the compensatory capabilities of the organ are disrupted, homeostasis is disrupted at the cellular and organizational levels, and the development of the main pathological processes is noted.The aim of the study is to compare the morphological mechanisms of maintaining structural homeostasis of the liver in the dynamics of the impact on the body of coal-rock dust and sodium fluoride.Materials and methods. Experimental studies were conducted on adult white male laboratory rats. Features of morphological mechanisms for maintaining structural homeostasis of the liver in the dynamics of exposure to coal-rock dust and sodium fluoride were studied on experimental models of pneumoconiosis and fluoride intoxication. For histological examination in experimental animals, liver sampling was performed after 1, 3, 6, 9, 12 weeks of the experiment.Results. The specificity of morphological changes in the liver depending on the harmful production factor was revealed. It is shown that chronic exposure to coal-rock dust and sodium fluoride is characterized by the development of similar morphological changes in the liver and its vessels from the predominance of the initial compensatory-adaptive to pronounced violations of the stromal and parenchymal components. Long-term inhalation of coal-rock dust at 1–3 weeks of seeding triggers adaptive mechanisms in the liver in the form of increased functional activity of cells, formation of double-core hepatocytes, activation of immunocompetent cells and endotheliocytes, ensuring the preservation of the parenchyma and the general morphostructure of the organ until the 12th week of the experiment. Exposure to sodium fluoride leads to early disruption of liver compensatory mechanisms and the development of dystrophic changes in the parenchyma with the formation of necrosis foci as early as the 6th week of the experiment.Conclusions. The study of mechanisms for compensating the liver structure in conditions of long-term exposure to coal-rock dust and sodium fluoride, as well as processes that indicate their failure, and the timing of their occurrence, is of theoretical and practical importance for developing recommendations for the timely prevention and correction of pathological conditions developing in employees of the aluminum and coal industry.The authors declare no conflict of interests.

Immunodetection of Ostertagia ostertagi in Cattle Milk Samples in Wasit Province

2017 ◽  
Vol 1 (28) ◽  
pp. 637-648
Author(s):  
Abbas Hassan Khlaty Al-Sray
Keyword(s):  
Milk Production ◽  
Herd Size ◽  
Elisa Test ◽  
Production Factor ◽  
Size Factor ◽  
Ostertagia Ostertagi ◽  
Milk Samples ◽  
Management Group ◽  
Breed Group ◽  
Age Factor

The aim of present study was to detect the seroprevalence of Ostertagia ostertagi specific antibodies in cattle milk samples in Wasit province, by using the indirect ELISA test for first time in Iraq. For this purpose, an overall 368 dairies cow was submitted for study and the results were revealed that 51 (13.86 %) of tested cows were positive, and the mean optic density ratios (ODRs) of ELISA test values in seropositive cattle were 0.58. Also, this study aimed to investigate an association of seropositive results with some epidemiological risk factors. Hence, the positive results, according to these factors, were as follow: in milk production factor, 6.32 % for ³18 liters/day group, 14.29 % for ³10-18 liters/day group, and 25 % for < 10 liters/day group; in age factor, 13.41% for ³3-6 years group, and 14.75% for >6 years group; in breed factor, 18.27% for local breed group, 12.17% for cross-breed group, and 12% for pure breed group; in farm management factor, 21.35% for bad management group, and 5.68% for good management group; and in herd size factor, 11.59% for <25 (cow/herd) group, and 17.78% for ³ 25 (cow/herd) group. Statistically, the significant differences (P£ 0.05) were observed among related groups of milk production, breed, husbandry management, and herd size factors; while it’s not reported among groups of age factor.

scholarly journals Critical Dynamics of Defects and Mechanisms of Damage-Failure Transitions in Fatigue

Materials ◽  
2021 ◽  
Vol 14 (10) ◽  
pp. 2554
Author(s):  
Oleg Naimark ◽  
Vladimir Oborin ◽  
Mikhail Bannikov ◽  
Dmitry Ledon
Keyword(s):  
Fatigue Damage ◽  
Kinetic Equations ◽  
Experimental Methodology ◽  
Preliminary Deformation ◽  
Scaling Properties ◽  
In Situ Data ◽  
Number Of Cycles ◽  
Fish Eye ◽  
Very High

An experimental methodology was developed for estimating a very high cycle fatigue (VHCF) life of the aluminum alloy AMG-6 subjected to preliminary deformation. The analysis of fatigue damage staging is based on the measurement of elastic modulus decrement according to “in situ” data of nonlinear dynamics of free-end specimen vibrations at the VHCF test. The correlation of fatigue damage staging and fracture surface morphology was studied to establish the scaling properties and kinetic equations for damage localization, “fish-eye” nucleation, and transition to the Paris crack kinetics. These equations, based on empirical parameters related to the structure of the material, allows us to estimate the number of cycles for the nucleation and advance of fatigue crack.

scholarly journals Preliminary deformation density studies of Z-DNA hexamer duplex d(CGCGCG)2

2011 ◽  
Vol 67 (a1) ◽  
pp. C513-C514
Author(s):  
M. Kubicki ◽  
K. Brzeziński ◽  
M. Jaskólski ◽  
Z. Dauter ◽  
B. Guillot
Keyword(s):  
Preliminary Deformation ◽  
Deformation Density ◽  
Z Dna

Technology revolutions and social development

2005 ◽  
Vol 32 (5) ◽  
pp. 454-482 ◽  
Author(s):  
Peter L. Daniels
Keyword(s):  
Energy Saving ◽  
Well Being ◽  
Economic Effects ◽  
Production Factor ◽  
Human Welfare ◽  
Content Type ◽  
Energy And Environment ◽  
Socioeconomic System ◽  
Trade Competitiveness ◽  
Development Approach

PurposeAims to assess the potential for a broad “green” technoeconomic paradigm (TEP) to effectively achieve and sustain higher levels of welfare from economic and environmental sources in manylower income countries (LIC). A green TEP comprises a new socioeconomic system based upon a set of inter‐related technologies that increase human welfare, but focus upon saving material, energy and other environmental resources. TEPs have pervasive social and economic effects that include substantial productivity, trade competitiveness, and environmental quality advantages. The desirability of such economic change must incorporate the general approach of social economics and alternative notions of well‐being.Design/methodology/approachThe paper is largely discursive in nature and provides a systematic identification of the LIC conditions that are likely to promote, and benefit from, the pervasive adoption of material‐ and energy‐saving technologies. Some results of an exploratory cross‐country study of the empirical link between technology capability and the human development index (HDI) are utilized in the discussion.FindingsThe paper concludes that a green TEP may well provide a viable alternative development approach in the LICs. The main advantages are derived from related resource efficiency gains and reductions in the socioeconomic metabolism, and the benefits of a relative production factor shift toward labor (and away from materials, energy, and environment‐intensive capital). The potential for LICs is also facilitated by the positive spillovers and decreasing cost of green TEP‐related knowledge and technology diffusion in the expanding, decentralizing global communication network. The higher income nations would need to play a significant role in this process.Originality/valueEcological modernisation and material and energy‐saving technologies are widely viewed as essential for achieving long‐term economic and social well‐being improvements in the twenty‐first century and beyond. Discussion of this promising approach typically assumes that this transformation is only viable in the technological and economic context of the higher income nations. However, this paper provides a detailed case for the strategic encouragement and adoption of a green TEP for sustainable economic development and environmental conditions in LICs.

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