Semi-group methods for construction of exact, approximated, and regularized solutions

2016 ◽  
pp. 3-41
Keyword(s):  
Semi Group ◽  
Group Methods

scholarly journals Semi-group methods in stochastic control

1985 ◽  
Vol 14 (1) ◽  
pp. 47-58
Author(s):  
A. Bensoussan
Keyword(s):  
Stochastic Control ◽  
Semi Group ◽  
Group Methods

Efficiency of 3% Non-epinephrine Mepivacaine Application During Intraligamentary Anesthesia With Positive and Negative Aspiration in Pain Sensitivity to Electric Current of Young Subject`s Upper Anterior Teeth Pulp:

2017 ◽  
Vol 1 (1) ◽  
Keyword(s):  
Pain Sensitivity ◽  
Pain Threshold ◽  
Young Subject ◽  
Reference Level ◽  
Maximum Effect ◽  
Anterior Teeth ◽  
Randomized Controlled Studies ◽  
Group Methods ◽  
Peak Increase ◽  
Infiltration Anesthesia

Background: Separation methods of local anesthesia to diffuse and vascular must significantly affect the clinical effect of adrenaline containing local anesthetic (mepivacaine). The aim of this prospective, randomized, controlled studies µAde was to compare the degree of anesthesia of intact upper lateral incisor the cartridge ¼ 3% mepivacain without epinephrine in the group after the infiltration and after intraligamentary anesthesia (ILA) in the experimental group. Methods: Anesthesia performed computer syringe Sleeper One 86 subjects aged 20-23 years. In all cases, aspiration was performed. With pulp tester IVN-01 measured the pain threshold incisors and canines in microamperes during the anesthetic effect. Results: Reference level of all researched teeth (86 subjects) was ranged from 1 to 10 µA. Uniform pain threshold increase to 95 (±20) µA by 5 min. watched during infiltration anesthesia then this value gradually descended to reference level (by 20 min.). Peak single increase of pain threshold to 55 (±8,9) µA occurred immediately after 1st minute of ILA, then this value subsequently drops to reference level (10 µA) by 20 minutes. Difference between groups of infiltration and intraligamentary anesthesia (ILA+ red) and (ILA – green) presented on Chart 6. Conclusions: Infiltration anesthesia with mepivacaine without epinephrine smoothly diffusely increased the pain threshold of the front teeth, reaching a significant, maximum effect by 5 minutes. Intraligamentary injection immediately after administration created a peak increase in pain sensitivity at a lower level, almost without the participation of the diffuse component.

Challenges and threats to the economic security in the ferrous metallurgy

2020 ◽  
Vol 8 (8) ◽  
pp. 1527-1544
Author(s):  
I.L. Ryabkov ◽  
N.N. Yashalova
Keyword(s):  
Ferrous Metallurgy ◽  
Financial Management ◽  
Ferrous Metal ◽  
Economic Security ◽  
Competitive Advantages ◽  
Corporate Strategies ◽  
Group Methods ◽  
Production Distribution ◽  
The Impact ◽  
Market Strategies

Subject. The article focuses on market strategies of the Russian enterprises operating in the ferrous metallurgy. Objectives. The study is to analyze corporate strategies the leading ferrous metal manufacturers use in the Russian Federation, such as NLMK Group, Severstal, Magnitogorsk Iron & Steel Works, EVRAZ Group. Methods. The study interprets public financial statements and methods of the logic, intuitive and comparative analysis. Results. We analyze market strategies of the Russian metal manufacturers, determine their development priorities and competitive advantages and weaknesses. We describe the impact of various threats and measures metallurgical companies undertake to eliminate them. Conclusions and Relevance. We sorted out possible threats and exposures of the Russian metallurgic companies' economic security and traced the dynamics of their significance for 2015 to 2019. Key threats relate to policies, economy, external and internal market, regulations and laws, production, distribution and financial management, consumption, IT, social welfare and environment.

Sub-normed Z-linear Spaces on Commutative Semi-group

2012 ◽  
Vol 14 (2) ◽  
pp. 157
Author(s):  
Yanqiu WANG ◽  
Huaxin ZHAO
Keyword(s):  
Semi Group ◽  
Linear Spaces

Thin structure of heterogeneous and multiphase fluid flows

2012 ◽  
Vol 9 (1) ◽  
pp. 175-180
Author(s):  
Yu.D. Chashechkin
Keyword(s):  
Large Scale ◽  
Fundamental System ◽  
Fluid Flows ◽  
Regular Solutions ◽  
Flow Models ◽  
Group Methods ◽  
Wide Range ◽  
Thin Structure ◽  
Multiphase Fluid ◽  
Complete Solutions

According to the results of visualization of streams, the existence of structures in a wide range of scales is noted: from galactic to micron. The use of a fundamental system of equations is substantiated based on the results of comparing symmetries of various flow models with the usage of theoretical group methods. Complete solutions of the system are found by the methods of the singular perturbations theory with a condition of compatibility, which determines the characteristic equation. A comparison of complete solutions with experimental data shows that regular solutions characterize large-scale components of the flow, a rich family of singular solutions describes formation of the thin media structure. Examples of calculations and observations of stratified, rotating and multiphase media are given. The requirements for the technique of an adequate experiment are discussed.

Simulation and Modeling of Turbulent Flows

1996 ◽  
Keyword(s):  
Numerical Simulation ◽  
Turbulent Flow ◽  
Turbulent Flows ◽  
Simulation And Modeling ◽  
Simulation Techniques ◽  
Rational Development ◽  
Group Methods ◽  
Turbulent Closure ◽  
The Subject ◽  
Renormalization Group Methods

This book provides students and researchers in fluid engineering with an up-to-date overview of turbulent flow research in the areas of simulation and modeling. A key element of the book is the systematic, rational development of turbulence closure models and related aspects of modern turbulent flow theory and prediction. Starting with a review of the spectral dynamics of homogenous and inhomogeneous turbulent flows, succeeding chapters deal with numerical simulation techniques, renormalization group methods and turbulent closure modeling. Each chapter is authored by recognized leaders in their respective fields, and each provides a thorough and cohesive treatment of the subject.

scholarly journals Teaching during the Pandemic: A Comparison in Psychological Wellbeing among Smart Working Professions

2021 ◽  
Vol 13 (9) ◽  
pp. 4850
Author(s):  
Emanuela Mari ◽  
Giulia Lausi ◽  
Angelo Fraschetti ◽  
Alessandra Pizzo ◽  
Michela Baldi ◽  
...  
Keyword(s):  
Ad Hoc ◽  
Well Being ◽  
Total Sample ◽  
Italian Population ◽  
Online Questionnaire ◽  
Psychological Variables ◽  
Group Methods ◽  
Random Probability ◽  
Smart Working ◽  
Restrictive Measures

Background: As a result of the COVID-19 pandemic, since March 2020, the Italian population was forced into lockdown to prevent the spread of the virus. The restrictive measures imposed forced many organizations and workers to work through online platforms and no longer in-person. Smart working, enjoyed by some workers for its flexibility, affected several professional categories. The purpose of this study was to investigate whether there are differences in the psychological variables related to four groups of professional categories (practitioners, managers, executive employees, teachers), particularly the teachers group. Methods: A total sample of 628 individuals was recruited through a random probability sample across Italy. Due to the lockdown, an online questionnaire was developed; several validated scales were chosen, and some ad hoc constructed items related to the smart working experience were included. Results: The results showed statistically significant differences between the four groups of examined smart workers. Conclusions: All workers have had to readjust to this new way of working, but our results show that teachers were the most affected, both in the perception of their psychological well-being and in the management of the smart working mode.

Focus Group Methods for Formative Research in Child Survival: An Ivoirian Example

1988 ◽  
Vol 8 (4) ◽  
pp. 297-316 ◽  
Author(s):  
Deborah Glik ◽  
Andrew Gordon ◽  
William Ward ◽  
Kale Kouame ◽  
Mahbi Guessan
Keyword(s):  
Focus Group ◽  
Program Planning ◽  
Child Survival ◽  
Sub Saharan Africa ◽  
Focus Group Interviews ◽  
Education Planning ◽  
Group Methods ◽  
Interview Methods ◽  
Sub Saharan ◽  
Group Interviews

The study reported here represents the ongoing development of focus group interview methods in support of health education planning for child survival programs in the CCCD project in Sub-Saharan Africa. Using illustrative examples from a field experience in Cote d'Ivoire, methods that enhance the usefulness and validity of focus group interviews for health program planning are discussed.

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