scholarly journals Role of Newtonian heating on a Maxwell fluid via special functions: memory impact of local and nonlocal kernels

2021 ◽  
Vol 2021 (1) ◽  
Author(s):  
Nazish Iftikhar ◽  
Fatima Javed ◽  
Muhammad Bilal Riaz ◽  
Muhammad Abbas ◽  
Abdullah M. Alsharif ◽  
...  
Keyword(s):  
Memory Effect ◽  
Fractional Derivatives ◽  
Special Functions ◽  
Maxwell Fluid ◽  
Laplace Transforms ◽  
Time Dependent ◽  
Abc Model ◽  
Newtonian Heating ◽  
The Impact

AbstractThe impact of Newtonian heating on a time-dependent fractional magnetohydrodynamic (MHD) Maxwell fluid over an unbounded upright plate is investigated. The equations for heat, mass and momentum are established in terms of Caputo (C), Caputo–Fabrizio (CF) and Atangana–Baleanu (ABC) fractional derivatives. The solutions are evaluated by employing Laplace transforms. The change in the momentum profile due to variability in the values of parameters is graphically illustrated for all three C, CF and ABC models. The ABC model has proficiently revealed a memory effect.

scholarly journals The Collection Efficiency of Shielded and Unshielded Precipitation Gauges. Part II: Modeling Particle Trajectories

2015 ◽  
Vol 17 (1) ◽  
pp. 245-255 ◽  
Author(s):  
Matteo Colli ◽  
Luca G. Lanza ◽  
Roy Rasmussen ◽  
Julie M. Thériault
Keyword(s):  
Collection Efficiency ◽  
Time Dependent ◽  
Navier Stokes ◽  
Turbulent Structures ◽  
Eddy Simulation ◽  
Large Eddy ◽  
Efficiency Comparison ◽  
The One ◽  
The Impact

Abstract The use of windshields to reduce the impact of wind on snow measurements is common. This paper investigates the catching performance of shielded and unshielded gauges using numerical simulations. In Part II, the role of the windshield and gauge aerodynamics, as well as the varying flow field due to the turbulence generated by the shield–gauge configuration, in reducing the catch efficiency is investigated. This builds on the computational fluid dynamics results obtained in Part I, where the airflow patterns in the proximity of an unshielded and single Alter shielded Geonor T-200B gauge are obtained using both time-independent [Reynolds-averaged Navier–Stokes (RANS)] and time-dependent [large-eddy simulation (LES)] approaches. A Lagrangian trajectory model is used to track different types of snowflakes (wet and dry snow) and to assess the variation of the resulting gauge catching performance with the wind speed. The collection efficiency obtained with the LES approach is generally lower than the one obtained with the RANS approach. This is because of the impact of the LES-resolved turbulence above the gauge orifice rim. The comparison between the collection efficiency values obtained in case of shielded and unshielded gauge validates the choice of installing a single Alter shield in a windy environment. However, time-dependent simulations show that the propagating turbulent structures produced by the aerodynamic response of the upwind single Alter blades have an impact on the collection efficiency. Comparison with field observations provides the validation background for the model results.

The concept of chronotypes and its clinical importance for depressive disorders

2017 ◽  
Vol 53 (3) ◽  
pp. 224-240 ◽  
Author(s):  
Matthias J Müller ◽  
Anja Haag
Keyword(s):  
Human Behavior ◽  
Environmental Conditions ◽  
Depressive Disorders ◽  
Clinical Importance ◽  
Time Dependent ◽  
Behavioral Correlates ◽  
Physiological Processes ◽  
Important Field ◽  
The Impact

Chronobiology and chronobiological research deal with time-dependent physiological processes and behavioral correlates as well as their adaptation to environmental conditions. Chronobiological research is presently focused on the impact of circadian rhythms on human behavior. In the last three decades, chronobiology has established itself as an independent area of research evolving to an important field of clinical psychology and psychiatry. In this overview, the results of studies on the clinical importance of chronotypes are summarized. The main focus is on the role of chronotype in depressive disorders.

The Impact of Irrational Beliefs on Paranoid Thoughts

2018 ◽  
Vol 47 (3) ◽  
pp. 270-286 ◽  
Author(s):  
Radu Soflau ◽  
Daniel O. David
Keyword(s):  
Irrational Beliefs ◽  
Empirical Support ◽  
Psychotic Symptoms ◽  
Abc Model ◽  
Rational Beliefs ◽  
Wide Range ◽  
Negative Perceptions ◽  
Cognitive Behavioral Theory ◽  
The Impact

Background: Although the ABC model proposed by cognitive behavioral theory has strong empirical support for a wide range of psychological problems, little is known about the role of irrational beliefs (IBs), a central concept of the ABC model, in the aetiology of paranoid thoughts, one of the most common psychotic symptoms. Aims: The present study aimed to investigate the impact of IBs on paranoid thoughts and people's perceptions of others. Method: Eighty-one non-clinical participants (m age = 21.21 years, SD = 2.72, range 18–33; 83.95% female) recruited for this study were randomly assigned to one of the two conditions: IBs or rational beliefs (RBs). In a role-play paradigm, subjects were asked to imagine holding a list of IBs or RBs, respectively, while being exposed to a neutral social context in a virtual reality environment. Results: In line with the ABC model, results indicate that IBs lead to significantly higher levels of state paranoid thoughts and more negative perceptions of others than RBs, even after controlling for participants’ baseline irrationality and trait paranoia [F (5,68) = 11.23, p < .001, Wilk's λ = .54, partial η2 = .45]. Conclusions: The findings of this paper suggest that IBs might play an aetiological role in the occurrence of paranoid thoughts. Practical and theoretical implications of these results are also considered.

scholarly journals Coronomics, Financial support for the Economy and its Zombie-ing (In the Context of the Fifth Factor of Production)

2021 ◽  
Vol 25 (5) ◽  
pp. 6-23
Author(s):  
V. Papava ◽  
M. Chkuaseli
Keyword(s):  
Economic Crisis ◽  
Financial Support ◽  
Special Functions ◽  
The Political ◽  
Global Character ◽  
Political Interests ◽  
Analysis And Synthesis ◽  
The Government ◽  
The Impact

The paper examines the impact of the COVID-19 pandemic on the economy and the corresponding atypical economic crisis, the role of the economic ability of the government during this crisis, aspects of financial support for the economy and the peculiarities of the zombie economy. The aim of the study is to research the actions of the economic ability of the government as an independent factor of production in the context of the COVID-19 pandemic, contributing to the unfolding of the process of zombie-ing the economy. The research uses the methods of deduction and induction, analysis and synthesis, analogy and abstraction. The special functions of the government are considered within the context of the economic crisis caused by the COVID-19 pandemic; particularly, we refer to the recognition of the fifth factor of production of the economic ability of the government. The main features of this atypical crisis are characterized. It is shown that the process of deglobalization during the COVID-19 pandemic characterizes the deglobalization of the economic ability of the government and that this process is temporary, since overcoming the global phenomenon of the pandemic and the economic crisis caused by it requires exclusively global efforts and measures. Particular attention is focused on the financial support of the economy from the economic ability of the government within the context of this economic crisis. The conclusion is that this support contributes to the process of zombie-ing the economy which took on a global character during the global financial and economic crisis of 2007–2009 and continued after its completion. Zombie-ing the economy is the result of a conflict between the political interests of the government and its economic ability when the latter is not able to overcome the barrier created by the former. A solution to this problem is possible through changes in bankruptcy legislation when its main principle of avoiding the unwanted bankruptcy of firms will be replaced by the principle of liquidation of unviable firms. Such a change in bankruptcy legislation can be implemented only during the economic upswing.

scholarly journals Semi-analytical technique for the solution of fractional Maxwell fluid

2017 ◽  
Vol 95 (5) ◽  
pp. 472-478 ◽  
Author(s):  
M. Abdullah ◽  
Asma Rashid Butt ◽  
Nauman Raza ◽  
Ehsan Ul Haque
Keyword(s):  
Circular Cylinder ◽  
Fractional Derivatives ◽  
Bessel Functions ◽  
Maxwell Fluid ◽  
Inverse Transformation ◽  
Physical Parameters ◽  
Time Dynamic ◽  
Analytical Technique ◽  
In Series ◽  
The Impact

In this work, the flow of a fractional Maxwell fluid is discussed. The velocity function and time-dependent shear stress of a Maxwell fluid with fractional derivatives are calculated. It is considered that the fluid in the infinitely long circular cylinder is moving with a velocity ft. The fluid in the infinitely long circular cylinder of radius R is initially at rest and at t = 0+, because of shear, it instantly starts to move longitudinally. To obtain the solutions, we have employed Laplace transformation and modified Bessel equation. The solutions are in series form, which are expressed in terms of modified Bessel functions [Formula: see text] and [Formula: see text], and satisfy all given conditions. In this paper, Laplace inverse transformation has been calculated numerically by using MATLAB. The behavior of the following physical parameters on the flow are investigated: relaxation time, dynamic viscosity, kinematics viscosity, similarity parameters of fractional derivatives and radius of the circular cylinder. Finally, the impact of the fractional parameter and material elements is shown by graphical demonstration.

scholarly journals Modeling of Cumulative QoE in On-Demand Video Services: Role of Memory Effect and Degree of Interest

2019 ◽  
Vol 11 (8) ◽  
pp. 171 ◽  
Author(s):  
Tho Nguyen Duc ◽  
Chanh Minh Tran ◽  
Phan Xuan Tan ◽  
Eiji Kamioka
Keyword(s):  
Memory Effect ◽  
Human Perception ◽  
Related Factors ◽  
Proposed Model ◽  
Streaming Services ◽  
Qoe Model ◽  
The Impact ◽  
Perceptual Factors

The growing demand on video streaming services increasingly motivates the development of a reliable and accurate models for the assessment of Quality of Experience (QoE). In this duty, human-related factors which have significant influence on QoE play a crucial role. However, the complexity caused by multiple effects of those factors on human perception has introduced challenges on contemporary studies. In this paper, we inspect the impact of the human-related factors, namely perceptual factors, memory effect, and the degree of interest. Based on our investigation, a novel QoE model is proposed that effectively incorporates those factors to reflect the user’s cumulative perception. Evaluation results indicate that our proposed model performed excellently in predicting cumulative QoE at any moment within a streaming session.

scholarly journals On the Role of Financial Support Programs in Mitigating the Sars-CoV-2 Spread in Brazil

2021 ◽  
Author(s):  
Vinicius V. L. Albani ◽  
Roseane A. S. Albani ◽  
Nara Bobko ◽  
Eduardo Massad ◽  
Jorge P. Zubelli
Keyword(s):  
Mobile Phone ◽  
Social Isolation ◽  
Financial Support ◽  
Reproduction Number ◽  
Time Dependent ◽  
Support Programs ◽  
Brazilian State ◽  
The Impact ◽  
At Home

We calculate the impact of a socioeconomic program during 2020 as a measure to mitigate the Coronavirus Disease 2019 (COVID-19) outbreak in Brazil. For each Brazilian State, we estimate the time-dependent reproduction number from daily reports of COVID-19 infections and deaths using a Susceptible-Exposed-Infected-Recovered-like (SEIR-like) model. Then, we analyse the correlations between the reproduction number, the amount of individuals receiving governmental aid, and the index of social isolation based on mobile phone information. We conclude that socioeconomic programs had a significant impact on reducing the accumulated numbers of infections and deaths by allowing those in need to stay at home, adhering to social isolation.

Intergroup Threat and Outgroup Attitudes

2013 ◽  
Vol 44 (5) ◽  
pp. 311-319 ◽  
Author(s):  
Marco Brambilla ◽  
David A. Butz
Keyword(s):  
Gay Men ◽  
Social Group ◽  
Welfare Recipients ◽  
Intergroup Attitudes ◽  
Social Policies ◽  
Intergroup Threat ◽  
Economic Threat ◽  
The Impact ◽  
General Climate

Two studies examined the impact of macrolevel symbolic threat on intergroup attitudes. In Study 1 (N = 71), participants exposed to a macrosymbolic threat (vs. nonsymbolic threat and neutral topic) reported less support toward social policies concerning gay men, an outgroup whose stereotypes implies a threat to values, but not toward welfare recipients, a social group whose stereotypes do not imply a threat to values. Study 2 (N = 78) showed that, whereas macrolevel symbolic threat led to less favorable attitudes toward gay men, macroeconomic threat led to less favorable attitudes toward Asians, an outgroup whose stereotypes imply an economic threat. These findings are discussed in terms of their implications for understanding the role of a general climate of threat in shaping intergroup attitudes.

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