scholarly journals Energy of a free Brownian particle coupled to thermal vacuum

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
J. Spiechowicz ◽  
J. Łuczka
Keyword(s):  
Brownian Particle ◽  
Dominant Role ◽  
Interaction Strength ◽  
Average Energy ◽  
Dissipation Function ◽  
Absolute Zero ◽  
Strong Coupling Regime ◽  
Generalized Langevin Equation ◽  
Thermal Vacuum ◽  
The Impact

AbstractExperimentalists have come to temperatures very close to absolute zero at which physics that was once ordinary becomes extraordinary. In such a regime quantum effects and fluctuations start to play a dominant role. In this context we study the simplest open quantum system, namely, a free quantum Brownian particle coupled to thermal vacuum, i.e. thermostat in the limiting case of absolute zero temperature. We analyze the average energy $$E=E(c)$$ E = E ( c ) of the particle from a weak to strong interaction strength c between the particle and thermal vacuum. The impact of various dissipation mechanisms is considered. In the weak coupling regime the energy tends to zero as $$E(c) \sim c\, \ln {(1/c)}$$ E ( c ) ∼ c ln ( 1 / c ) while in the strong coupling regime it diverges to infinity as $$E(c) \sim \sqrt{c}$$ E ( c ) ∼ c . We demonstrate it for selected examples of the dissipation mechanisms defined by the memory kernel $$\gamma (t)$$ γ ( t ) of the Generalized Langevin Equation. We reveal how at a fixed value of c the energy E(c) depends on the dissipation model: one has to compare values of the derivative $$\gamma '(t)$$ γ ′ ( t ) of the dissipation function $$\gamma (t)$$ γ ( t ) at time $$t=0$$ t = 0 or at the memory time $$t=\tau _c$$ t = τ c which characterizes the degree of non-Markovianity of the Brownian particle dynamics. The impact of low temperature is also presented.

The impact of applying the Common Customs Tariff on the armenian export of Cut and Polished Gems to Russia

2019 ◽  
pp. 33-41
Author(s):  
V. L. Harutyunyan ◽  
S. V. Dokholyan ◽  
A. R. Makaryan
Keyword(s):  
Manufacturing Sector ◽  
Practical Implication ◽  
Dominant Role ◽  
New Technology ◽  
Manufacturing Companies ◽  
Medium Term ◽  
Diamond Cutting ◽  
Global Trends ◽  
The Common ◽  
The Impact

The presented study discusses the issues of applying the Common Customs Tariff (CCT) rates of the Eurasian Economic Union (EAEU) on rough diamonds and the impact thereof on the exports of stones cut and polished inArmeniaand then exported toRussia.Aim. The study aims to identify the possible strategies Armenian diamond cutting and polishing companies could adopt as a response to the application of the CCT rates on rough diamonds and how it would affect exports to various destinations, namely to Russia.Tasks. The authors analyze the current state of the gems and jewelry sector and substantiate the need to either integrate it into the jewelry manufacturing sector or to apply various strategies to facilitate exports to either Russia or other destinations in the medium term in response to the application of the CCT rates.Methods. This study uses general scientific methods of cognition, including analytical and methodological approaches and elements of forecasting. Possible strategies the Armenian diamond cutting and polishing companies could adopt in the medium term in response to the application of the EAEU CCT rates are determined using the analytical research method, forecasts in the context of the developments in the Armenian gem processing and jewelry market and global trends, statistical data on the imports and exports of cut and polished gems and jewelry for 2014–2018 published by the UN Comtrade Statistics.Results. Statistics on the exports of processed diamonds from 2014 to 2018 highlights the issue associated with the loss of competitiveness suffered by Armenian companies (mainly in comparison with Indian diamond cutters). The major global trends in the diamond cutting and polishing business indicate that it could be virtually impossible for Armenian cutters and polishers to compete with Indian companies in the medium term if they do not comes to investing in new technology to achieve operational efficiency. For these companies, it is important not to lose the Russian market due to an increase in the tariff rate and concentrate on the processing of gems that are larger than 1 carat. Another strategy to avoid an increase in the customs tariff rates would depend on the Armenian government’s ability to negotiate with Russia in respect of direct imports of diamond stones from Russian manufactures. Two other options for Armenian cutters involve focusing on cutting and polishing of rubies, sapphires, emeralds, etc. or integrating into the jewelry sector either by being the primary supplier or by considering this business as a channel to sell processed diamond stones by setting up their own jewelry manufacturing companies.Conclusions. With CCT going into effect in January 2021 and India’s dominant role in the diamond cutting and polishing business, Armenia needs to carefully consider all of the strategies the Armenian companies could adopt, as discussed above. As a member state of the EAEU, Armenia freely exports to Russia, however, further exports to Russia would depend on Armenia’s ability to ensure that cost-effective operations are in place, or to concentrate on the processing of precious gems rather than diamonds, or to switch to the manufacturing of jewelry items as a major export item.Practical Implication. The findings of this study could be of interest to the Ministry of Economy of the Republic of Armenia and Business Armenia that could be used in elaborating the strategy for the development of Armenian gems and jewelry sector of the economy.

scholarly journals Sanctions as tools in the US foreign policy after the cold war

2006 ◽  
Vol 58 (4) ◽  
pp. 469-491
Author(s):  
Aleksandra Joksimovic
Keyword(s):  
Foreign Policy ◽  
Cold War ◽  
Public Diplomacy ◽  
Dominant Role ◽  
Us Foreign Policy ◽  
Military Interventions ◽  
The Third ◽  
The Us ◽  
The Cold War ◽  
The Impact

In searching for various opportunities to act in pursuing its foreign policy and endeavors to achieve a dominant role in the global processes USA has developed a broad range of instruments including a financial assistance as a way to be given support for its positions, intelligence activities, its public diplomacy, unilateral implementation of sanctions and even military interventions. The paper devotes special attention to one of these instruments - sanctions, which USA implemented in the last decade of the 20th century more than ever before. The author explores the forms and mechanisms for implementation of sanctions, the impact and effects they produce on the countries they are directed against, but also on the third parties or the countries that have been involved in the process by concurrence of events and finally on USA as the very initiator of imposing them.

scholarly journals Organisation design and the role of ICT: Negative effects of working from home during the coronavirus pandemic

2021 ◽  
Vol 16 (1) ◽  
pp. 1-12
Author(s):  
Ernad Kahrović ◽  
Emina Kahrović
Keyword(s):  
Dominant Role ◽  
Organization Design ◽  
Negative Effects ◽  
Work From Home ◽  
Working From Home ◽  
New Organizational Forms ◽  
The Creation ◽  
Impact Of Technology ◽  
The Impact

The goal of the paper is to point to the role and importance of organization design as a tool for strategy implementation, together with a dominant, role of technology in shaping the design. Namely, the development, of modern information and communication technology (ICT) is accompanied by the creation of new organizational forms, which enable the management, and employees to carry out, a significant, portion of work from home. The central focus of this paper is the impact, of technology on the creation of new forms of design, with a virtual organization taking up a particularly prominent, position. We underline the fact, that, among many changes that, the coronavirus pandemic has produced in everyday life, working from home can be considered as the most, drastic one; hence, its harmful effects are underscored, such as those relating to negative psychological effects, anxiety disorders, health issues, job loss, decreased efficiency and reduced satisfaction of the employees.

Anthropogenic perturbation modifies interactions between mammals and fruits in a tropical forest of southern Mexico

2021 ◽  
Vol 71 (3) ◽  
pp. 311-327
Author(s):  
Mayra Zamora-Espinoza ◽  
Juan Carlos López-Acosta ◽  
Eduardo Mendoza
Keyword(s):  
Daily Activity ◽  
Interaction Strength ◽  
Biotic Interactions ◽  
Camera Traps ◽  
Canis Lupus Familiaris ◽  
Mammalian Fauna ◽  
Mammal Species ◽  
Southern Mexico ◽  
Field Station ◽  
The Impact

Abstract Studies of tropical mammal defaunation highlight the loss of species as well as their reduction in abundance and diversity; however, there is a complex series of effects associated with this anthropogenic disruption, including increases in the relative abundance of disturbance-tolerant mammals and the arrival of alien mammals whose effects on biotic interactions have been poorly studied. We compared the species richness, composition, interaction strength, and patterns of daily activity of mammals that consume the fruits of Pouteria sapota on the forest floor, both inside and outside of the Los Tuxtlas Field Station (LTFS) in Veracruz, southern Mexico. Using camera traps, we recorded eight mammal species interacting with the fruits inside the LTFS ( trees) and nine species interacting outside ( trees). Alien species such as Canis lupus familiaris were recorded both inside and outside of the LTFS, whereas Bos taurus was only recorded outside. Medium-sized generalist mammals were overrepresented both inside and outside of the LTFS, evidencing an impoverishment of the fauna, when compared to the mammal assemblage reported to interact with P. sapota fruits in a more intact forest. The daily activity patterns of the mammals that interacted strongly with P. sapota fruits were different inside and outside the LTFS, particularly in the case of Cuniculus paca. Our results show that the impact of human activity is highly pervasive, directly affecting the mammalian fauna at different levels and indirectly affecting the biotic interactions in which these animals are involved.

Executive Function, Metacognition, and Language: Promoting Student Success With Explicit Strategy Instruction

2021 ◽  
pp. 1-14
Author(s):  
Lynn Meltzer ◽  
Michael Aaron Greschler ◽  
Kim Davis ◽  
Caitlin Vanderberg
Keyword(s):  
Academic Performance ◽  
Executive Function ◽  
Student Success ◽  
Dominant Role ◽  
Strategy Instruction ◽  
Language And Literacy ◽  
Self Monitoring ◽  
Important Relationship ◽  
Assessment And Treatment ◽  
The Impact

Purpose The purpose of this clinical focus article was to discuss the important relationship between executive function and language skills and to provide speech-language pathologists (SLPs) with strategies for promoting student success. Background and Method The impact of executive function processes on language and literacy begins in the preschool years and becomes increasingly important from third grade onward. These executive function processes play a more dominant role when tasks require students to integrate and synthesize multiple linguistic and other subskills in order to read and comprehend, write, complete projects, and study for quizzes and tests. In this clinical focus article, we provide a brief overview of research-based executive function strategies that are beneficial for all learners and are essential for students with language weaknesses as well as learning and attention difficulties. We focus on the key executive function processes that are the foundation of academic performance, namely, goal setting, organizing and prioritizing, thinking and problem-solving flexibly, accessing information in working memory, and self-monitoring. We discuss a theoretical framework for understanding and promoting metacognition and executive function as part of assessment and treatment plans for SLPs. Finally, we address the importance of executive function strategies for improving students' effort, academic performance, and resilience. Conclusion SLPs can promote student success by offering structured and systematic approaches to teaching executive function strategies.

Social Media Escapism: Exploratory Study of the use of Digital Media by Tirana University Students of English Language

2021 ◽  
Vol 30 (2) ◽  
pp. 196-211
Author(s):  
Iris Klosi
Keyword(s):  
Social Media ◽  
Digital Media ◽  
Online Teaching ◽  
English Language ◽  
Native Speakers ◽  
Communicative Competence ◽  
Dominant Role ◽  
State University ◽  
Face To Face ◽  
The Impact

The stress and anxiety resulting from the COVID-19 pandemic has lead to a significant increase in escapist media-based coping. This paper examines the impact of the Covid-19 pandemic on social media escapist activities by the students at the State University of Tirana. In total 52 undergraduate and graduate students aged 20-24 were involved in the study. The students reported 39 digital media involved in their escapist activities, with media sharing networks having a dominant role. From the analysis of their discussion of the motivations and different forms of escapist activities using social media, 5 different but interrelated discourses emerged: (1) Social media have both positive and negative aspects; (2) Social media escapism distorts reality; (3) Social media offer easy and affordable ways to escape; (4) Social media escapism needs to be managed to avoid addiction; and (5) Social media escapism enhances English language skills. The impacts of the Covid-19 pandemic through restrictions on socializing, face-to-face interaction and online teaching were discussed within and across the identified discourses. Increasing their communicative competence in English while interacting with people of different cultural background, including English native speakers was one of most the positive aspects in students’ discussions of social media escapism. The stress and anxiety resulting from the COVID-19 pandemic has lead to a significant increase in escapist media-based coping. This paper examines the impact of the Covid-19 pandemic on social media escapist activities by the students at the State University of Tirana. In total 52 undergraduate and graduate students aged 20-24 were involved in the study. The students reported 39 digital media involved in their escapist activities, with media sharing networks having a dominant role. From the analysis of their discussion of the motivations and different forms of escapist activities using social media, 5 different but interrelated discourses emerged: (1) Social media have both positive and negative aspects; (2) Social media escapism distorts reality; (3) Social media offer easy and affordable ways to escape; (4) Social media escapism needs to be managed to avoid addiction; and (5) Social media escapism enhances English language skills. The impacts of the Covid-19 pandemic through restrictions on socializing, face-to-face interaction and online teaching were discussed within and across the identified discourses. Increasing their communicative competence in English while interacting with people of different cultural background, including English native speakers was one of most the positive aspects in students’ discussions of social media escapism.

scholarly journals Impact of Core Sheet Cutting Method on Parameters of Induction Motors

Energies ◽  
2020 ◽  
Vol 13 (8) ◽  
pp. 1960 ◽  
Author(s):  
Maria Dems ◽  
Krzysztof Komeza ◽  
Witold Kubiak ◽  
Jacek Szulakowski
Keyword(s):  
Sheet Metal ◽  
Metal Cutting ◽  
Induction Motors ◽  
Dominant Role ◽  
Accurate Determination ◽  
Design Stage ◽  
Average Width ◽  
Core Losses ◽  
The Impact ◽  
Sheet Metal Cutting

The method of cutting motor core sheets causes a change in their magnetic properties and core losses, especially additional losses. Reducing motor losses is very important because of the fulfillment of increasingly stringent requirements set by international regulations for reducing electricity consumption. Due to fact that more and more often induction motors are supplied with high-frequency voltage, core losses are beginning to play a dominant role in the motor’s loss balance. That is why accurate determination of these losses is very important and cutting has a significant impact on them. This report shows how the method of cutting sheet metal affects losses in the finished induction motor working in a wide frequency range. The paper presents the impact of various motor core fabrication technologies on its operational parameters and an approximate way of including this impact in analytical calculations at the design stage of new machine designs, as it is necessary to use sheet metal cutting technologies such as laser or electrical discharge machining (EDM) at the prototype stage. The proposed method is based on measurements of sheet parameters made on toroidal samples with appropriately selected dimensions, so that the width of the sample corresponds to the average width of the motor core elements.

Molecular Dynamics of the Properties of Fluid Film Induced by Fluid-Solid Interaction Potential Strength in Wedge Nanochannel

2014 ◽  
Vol 574 ◽  
pp. 133-137
Author(s):  
Yan Jia ◽  
Ping Ge Qu
Keyword(s):  
Molecular Dynamics ◽  
Interaction Potential ◽  
Interaction Strength ◽  
Potential Interaction ◽  
Molecular Dynamics Method ◽  
Fluid Film ◽  
Potential Strength ◽  
The Impact ◽  
Fluid Solid Interaction ◽  
Dynamics Method

Molecular dynamics method is applied to study the influence of fluid-solid interaction potential on the properties of fluid film in wedge nanochannel. The pressure and density are studied for a variety of potential interaction strength between the liquid and the solid. The impact of potential interaction strength between the liquid and the solid on the pressure is limitation. The density alongydirection is affected by the potential interaction strength. As the potential interaction strength is weak, the density of liquids can be affected easily.

Investigating the Impact of Research and Development Strategy on Firm Performance

2011 ◽  
Vol 495 ◽  
pp. 306-309 ◽  
Author(s):  
Panagiotis Trivellas
Keyword(s):  
Firm Performance ◽  
Research And Development ◽  
Competitive Advantage ◽  
Development Strategy ◽  
Dominant Role ◽  
External Environment ◽  
Business Environment ◽  
Organizational Size ◽  
Market Shares ◽  
The Impact

This paper examines the influence of Research and Development (R&D) strategy on firm performance controlling for external environment. In this turbulent era, several firms build their competitive advantage on their innovation competence investing on R&D. Drawing upon a sample of 248 firms located in Greece, a structured questionnaire was developed to measure R&D strategy, external environment (dynamism, complexity, munificence, technological) and firm performance (financial, market, innovation, growth and organizational). The importance of R&D strategy in explaining the variance of all performance dimensions is confirmed with innovation performance playing a dominant role. Results indicate that R&D strategy is the most crucial antecedent of firm performance, controlling for business environment. Among environmental dimensions, only dynamism exerts statistical significant relationships. Regarding organizational size, larger firms possess a competitive advantage in the market, enjoying dominant market shares, while smaller firms exhibit supremacy regarding their innovative behavior.

Impact of Storage Integrated Solar Photovoltaics (PV) Power System on Utility Peak Loads

2011 ◽  
Author(s):  
K. Agyenim-Boateng ◽  
R. F. Boehm
Keyword(s):  
Large Scale ◽  
Peak Load ◽  
Average Energy ◽  
Transient Behavior ◽  
Climatic Conditions ◽  
Photovoltaic System ◽  
Solar Pv ◽  
Pv System ◽  
Grid Load ◽  
The Impact

The promise of large-scale use of renewables such as wind and solar for supplying electrical power is tempered by the sources’ transient behavior and the impact this would have on the operation of the grid. One way of addressing this is through the use of supplemental energy storage. While the technology for the latter has not been proven on a large scale or to be economical at the present time, some assessments of what magnitude is required can be made. In performing this work we have used NREL’s Solar Advisor Model (SAM 2010) with TMY3 solar data to estimate the photovoltaic system power generation. Climatic conditions close to load centers were chosen for the simulations. Then the PV output for varying sizes of arrays were examined and the impact of varying amounts of storage investigated. The storage was characterized by maximum limiting energy and power capacities based on annual hourly peak load, as well as its charging and discharging efficiencies. The simulations were performed using hourly time steps with energy withdrawn from, or input to, storage only after considering base generation and the PV system output in serving the grid load. In this work, we examined the load matching capability of solar PV generation (orientated for maximum summer output) for a sample Southwestern US utility grid load of 2008. Specifically we evaluated the daily and seasonal peak load shifting with employing varying storage capacities. The annual average energy penetration based on the usable solar PV output is also examined under these conditions and at different levels of system flexibility.

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