scholarly journals Reaction-layer asymptotics and the electrochemical pickling of steel

2011 ◽  
Vol 467 (2133) ◽  
pp. 2534-2560 ◽  
Author(s):  
M. Vynnycky ◽  
N. Ipek
Keyword(s):  
Numerical Model ◽  
Density Profile ◽  
Reaction Layer ◽  
Systematic Approach ◽  
Asymptotic Methods ◽  
Computational Mesh ◽  
Local Current ◽  
Current Density Profile ◽  
Homogeneous Chemical

Asymptotic methods are used to explore the role of one of the homogeneous chemical reactions, water protolysis, in a recent numerical model for the electrochemical pickling of steel. The analysis helps to interpret the somewhat surprising results of the original numerical model: that the local current density profile at the pickled strip does not depend on whether the water protolysis reaction is included in the model or not. The analysis also gives a useful systematic approach for determining qualitative estimates for the width of reaction boundary layers at cell electrodes, which can be of help when designing a computational mesh for the numerical solution of electrochemical models that have such layers.

scholarly journals The Role of Ion Acoustic Instability in the Development of the Azimuthal Current Density Profile in Liner Experiments at 1 MA

2018 ◽  
Vol 46 (6) ◽  
pp. 1921-1928
Author(s):  
Simon C. Bott-Suzuki ◽  
Samuel W. Cordaro ◽  
L. Atoyan ◽  
T. Byvank ◽  
W. Potter ◽  
...  
Keyword(s):  
Density Profile ◽  
Current Density ◽  
Acoustic Instability ◽  
Current Density Profile ◽  
Ion Acoustic ◽  
Azimuthal Current

Economic modeling of touristic services demand in the regions

2019 ◽  
pp. 87-93
Author(s):  
Ivan Blahun ◽  
Halyna Leshchuk ◽  
Mariya Kyfor
Keyword(s):  
Systematic Approach ◽  
Income Elasticity ◽  
Probability Model ◽  
Economic Modeling ◽  
Tourism Demand ◽  
Goods And Services ◽  
Household Incomes ◽  
Tourism Services ◽  
Income Decile

Considering the important role of tourism in the socio-economic development of regions, the need for information and modeling of ways to increase demand for tourism services and tourism development is being updated. The article uses methods of analytical, logical, comparative analysis and systematic approach to study trends in demand for tourist services in Ukraine. Econometric modeling analyzes the demand for tourism services by the level of income and expenditures of the population in 2018. Trends in demand for tourism services in 2018 in terms of income and expenditure of the population with the use of the Tornquist econometric model have been analyzed. It is proposed to use the decile groups of the population for analyzing income and expenditure by the level of income, total income per capita, the level of household expenditure relative to income, the percentage of tourism expenditure by households, the expenditure on tourism and the elasticity of tourism demand. Average values of the population’s expenditures on tourism were established, which helped to determine the elasticity of effective demand for each decile group. The more than one unit of elasticity of effective tourism demand for each decile group indicated that tourism services for domestic households belong to the group of luxury goods and services. It should be noted that in the following decile income groups of households there is a decrease in elasticity. It means that when income tends to increase indefinitely, elasticity coefficients fall, and this indicates a stabilization of costs of this type. In this case, the percentage of households in each decile group that recorded the costs of organized tourism in their budgets and the value of the probability of household participation in this form of recreation was determined based on an estimated probability model. An analysis of the values of income elasticity indicators in each income decile group has shown that increasing household incomes contribute to increased demand for tourism services and an increase in the share of expenditures for these purposes in household budgets.

Management of Pleural Effusions in the Emergency Department.

2020 ◽  
Vol 15 ◽  
Author(s):  
MT Congedo ◽  
GM Ferretti ◽  
D Nachira ◽  
MA Pennisi
Keyword(s):  
Emergency Department ◽  
Systematic Approach ◽  
Acute Chest Pain ◽  
Pleural Effusions ◽  
Therapeutic Approaches ◽  
Massive Pleural Effusion ◽  
Emergency Department Setting ◽  
Clinical Conditions ◽  
Definitive Management

Background: In symptomatic patients, admitted in emergency department for acute chest pain and dyspnea, who require an urgent treatment, a rapid diagnosis and prompt management of massive pleural effusion or hemothorax can be lifesaving. The aim of this review was to summarize the current diagnostic and therapeutic approaches for the management of the main types of pleural effusions that physicians can have in an emergency department setting. Methods: Current literature about the topic was reviewed and critically reported, adding the experience of the authors in the management of pleural effusions in emergency settings. Results: The paper analyzed the main types of pleural effusions that physicians can have to treat. It illustrated the diagnostic steps by the principal radiological instruments, with a particular emphasis to the role of ultrasonography, in facilitating diagnosis and guiding invasive procedures. Then, the principal procedures, like thoracentesis and insertion of small and large bore chest drains, are indicated and illustrated according to the characteristics and the amount of the effusion and patient clinical conditions. Conclusion: The emergency physician must have a systematic approach that allows rapid recognition, clinical cause identification and definitive management of potential urgent pleural effusions.

Aesthetics

2018 ◽  
Author(s):  
Michael N. Forster
Keyword(s):  
Systematic Approach ◽  
Semantic Content ◽  
Moral Values ◽  
Science And Religion ◽  
Individual Variability ◽  
German Romanticism ◽  
Philosophy Of Literature ◽  
Aesthetic Values

Aesthetics, or the philosophy of literature and art, was one of Herder’s main focuses. By valorizing these areas of culture (in comparison with others such as science and religion) and in several other ways he prepared the ground for German Romanticism. He also established many principles of great intrinsic importance: rejecting apriorism and systematization in aesthetics in favor of an empirical, non-systematic approach; insisting that arts such as sculpture and painting express meanings and therefore require interpretation; recognizing the central role of genre not only in literature but also in such arts; perceiving the deep historical, cultural, and even individual variability of literature and art in respect of semantic content, genre, moral values, and aesthetic values, plus the major implications this variability has for both interpretation and evaluation; developing a set of radical views concerning beauty; and emphasizing the importance of literature and art as means of moral pedagogy.

scholarly journals Balancing the formal and the informal in user-centred design

2021 ◽  
Author(s):  
Michael D Harrison ◽  
Paolo Masci ◽  
José Creissac Campos
Keyword(s):  
Formal Methods ◽  
Systematic Approach ◽  
Formal Analysis ◽  
Interactive Systems ◽  
User Evaluation ◽  
Analysis Techniques ◽  
User Centred Design ◽  
Early Design Stages ◽  
Cooperative Evaluation

Abstract This paper explores the role of formal methods as part of the user-centred design of interactive systems. An iterative process is described, developing prototypes incrementally, proving user-centred requirements while at the same time evaluating the prototypes that are executable forms of the developed models using ‘traditional’ techniques for user evaluation. A formal analysis complements user evaluations. This approach enriches user-centred design that typically focuses understanding on context and producing sketch designs. These sketches are often non-functional (e.g. paper) prototypes. They provide a means of exploring candidate design possibilities using techniques such as cooperative evaluation. This paper describes a further step in the process using formal analysis techniques. The use of formal methods provides a systematic approach to checking plausibility and consistency during early design stages, while at the same time enabling the generation of executable prototypes. The technique is illustrated through an example based on a pill dispenser.

scholarly journals The Role of Mesh Generation, Adaptation, and Refinement on the Computation of Flows Featuring Strong Shocks

2012 ◽  
Vol 2012 ◽  
pp. 1-15 ◽  
Author(s):  
Aldo Bonfiglioli ◽  
Renato Paciorri ◽  
Andrea Di Mascio
Keyword(s):  
Shock Waves ◽  
Mesh Generation ◽  
The Other ◽  
Shock Capturing ◽  
Structured Grids ◽  
Computational Mesh ◽  
Versatile Technique ◽  
Coarse Meshes ◽  
Shock Fitting

Within a continuum framework, flows featuring shock waves can be modelled by means of either shock capturing or shock fitting. Shock-capturing codes are algorithmically simple, but are plagued by a number of numerical troubles, particularly evident when shocks are strong and the grids unstructured. On the other hand, shock-fitting algorithms on structured grids allow to accurately compute solutions on coarse meshes, but tend to be algorithmically complex. We show how recent advances in computational mesh generation allow to relieve some of the difficulties encountered by shock capturing and contribute towards making shock fitting on unstructured meshes a versatile technique.

Effect of Current Density Profile onq(a) Limit in Non-Circular Tokamak TNT-A

1985 ◽  
Vol 54 (5) ◽  
pp. 1823-1829
Author(s):  
Katsumi Ida ◽  
Isao Ochiai ◽  
Shunjiro Shinohara ◽  
Yoshio Nagayama ◽  
Hiroshi Toyama ◽  
...  
Keyword(s):  
Density Profile ◽  
Current Density ◽  
Current Density Profile
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