scholarly journals Perfecting the Advanced 2D Multi-electrode Electrical Exploration method

2018 ◽  
Vol 34 (3) ◽  
Author(s):  
Minh Vũ
Keyword(s):  
Theoretical Model ◽  
Practical Application ◽  
Array Data ◽  
Data Collecting ◽  
Electrical Sounding

The Advanced Multi-electrode Electrical Sounding method (AMES) proposed by us was introduced at VNU. Journal of Mathematics-Physics, No. 31 (3), 2015. However, the published results are mostly focused on the symmetric MC array and tested on a theoretical model. In this paper, the authors continue systematically presenting and supplementing the results obtained after the study, namely the finalization and renaming of the AMES method into the Advanced 2D Multi-electrode Electrical Exploration (AMEE) method, including MC array, data collecting and processing, and testing on theoretical model and practical application  to confirm the superiority of this method.

THEORETICAL DEFINITIONS FOR AUXILIARY CONCEPTS OF VARIOUS LEVELS OF ABSTRACTION

2020 ◽  
pp. 28-31
Author(s):  
Valentin Karpovich
Keyword(s):  
Theoretical Model ◽  
Subject Area ◽  
Theoretical Concept ◽  
Theoretical Knowledge ◽  
Practical Application ◽  
Levels Of Abstraction ◽  
Theoretical Concepts ◽  
The Subject ◽  
Logical Constraints

Theoretical knowledge may contain various levels of abstraction represented by logical constructions from the observed characteristics of objects from the subject area of the theory. The degree of abstractness can be de-scribed by the complexity of the structures obtained from the initial observational terms. Such auxiliary construc-tions are characterized as explicit or implicitdefinitions of theoretical concepts in terms of observational. One of the techniques for constructing such definitions is the operationalization of abstractions by a system of reduction sentences. In this case a theoretical concept is characterized as “open” and plays a role of logical and methodo-logical constraints for expanding the possible connections of the theoretical model with the help of concepts from the domain of intended practical application.

Achieving a Working Balance Between Technology and Personal Contact Within a Classroom Environment

2011 ◽  
pp. 212-226
Author(s):  
Stephen Springer
Keyword(s):  
Distance Learning ◽  
Theoretical Model ◽  
Faculty Member ◽  
Classroom Environment ◽  
Faculty Members ◽  
Personal Contact ◽  
Practical Application ◽  
Human Relations ◽  
Exchange Of Information ◽  
Counseling Theory

This chapter addresses the author’s model to assist faculty members in gaining a closer relationship with distance learning students. The model that will be discussed consists of a greeting, message, reminder, and conclusion (GMRC). The GMRC will provide concrete recommendations designed to lead the faculty through the four steps. Using these steps in writing and responding to electronic messages demonstrates to the distance learning student that in fact the faculty member is concerned with each learner and the learner’s specific questions and needs. It is a practical application of human relations theory and is based on ideas generated by counseling theory. In addition, the chapter will take the reader through issues and examples that will arise during the duration of discussions and exchange of information using electronic messages. It is the intent of the author to provide not simply a theoretical model, but a model that can be learned and applied immediately upon completion of reviewing the article.

scholarly journals A Microfluidic Rotational Motor Driven by Circular Vibrations

Micromachines ◽  
2019 ◽  
Vol 10 (12) ◽  
pp. 809 ◽  
Author(s):  
Suzana Uran ◽  
Božidar Bratina ◽  
Riko Šafarič
Keyword(s):  
Theoretical Model ◽  
Piezoelectric Actuator ◽  
Rotational Speed ◽  
Water Droplet ◽  
Low Frequency ◽  
Piezoelectric Actuators ◽  
Frequency Region ◽  
Practical Application ◽  
3D Printed ◽  
Electro Wetting

Constructing micro-sized machines always involves the problem of how to bring the energy (electric, magnetic, light, electro wetting, vibrational, etc.) source to the device to produce mechanical movements. The paper presents a rotational micro-sized motor (the diameter of the rotor is 350 µm) driven by low frequency (200–700 Hz) circular vibrations, made by two piezoelectric actuators, through the medium of a water droplet with diameter of 1 mm (volume 3.6 µL). The theoretical model presents how to produce the circular streaming (rotation) of the liquid around an infinitely long pillar with micro-sized diameter. The practical application has been focused to make a time-stable circular stream of the medium around the finite long vibrated pillar with diameter of 80 µm in the presence of disturbances produced by the vibrated plate where the pillar is placed. Only the time-stable circular stream in the water droplet around the pillar produces enough energy to rotate the micro-sized rotor. The rotational speed of the rotor is controlled in both directions from −20 rad/s to +26 rad/s. 3D printed mechanical amplifiers of vibrations, driven by piezoelectric actuators, amplify the amplitude of the piezoelectric actuator up to 20 µm in the frequency region of 200 to 700 Hz.

Research on the Mechanism and Model of Contact Resistance

2014 ◽  
Vol 941-944 ◽  
pp. 580-583
Author(s):  
Hao Zhou ◽  
Qing Ji ◽  
Pei Jiang
Keyword(s):  
Theoretical Model ◽  
Contact Resistance ◽  
Calculation Method ◽  
Electrical Contact ◽  
Engineering Application ◽  
Practical Application ◽  
Practical Engineering ◽  
Contact Field

Study on contact resistance is a fundamental content of electrical contact field. The causes of contact resistance are complex, and a reasonable theoretical model poses significant impacts on the study and practical application of contact resistance. This paper describes the generating mechanism and components of contact resistance, highlights the summary on the development of the model, and gives the calculation method of contact resistance in practical engineering application.

Mechanical Behaviors of Metallic Strip Flexible Pipe Under Axisymmetric Loads

2018 ◽  
Author(s):  
Kaien Jiang ◽  
Ting Liu ◽  
Shuai Yuan ◽  
Yong Bai
Keyword(s):  
Theoretical Model ◽  
Element Model ◽  
Tensile Tests ◽  
Practical Application ◽  
Flexible Pipe ◽  
Promising Alternative ◽  
Mechanical Responses ◽  
External Pressures ◽  
Metallic Strip ◽  
Security And Reliability

Metallic Strip Flexible Pipe (MSFP) is regarded as a promising alternative for submarine pipelines. During the operation and service phases, MSFP will inevitably experience significant tension as well as internal and external pressures. In order to ensure the security and reliability of MSFP in the application, the mechanical responses of MSFP subjected to axisymmetric loads should be carefully estimated. In this paper, a theoretical model estimating the tension stiffness under axisymmetric loads is established, which takes the material plasticity into consideration. Additionally, a finite element model is developed by ABAQUS to verify the feasibility of the proposed theoretical model. The results from full-scale tensile tests of MSFP are also adopted to verify the proposed method’s validity in calculating its tension behavior. The coincidence between the results from different methods illustrates the accuracy and reliability of the proposed theoretical model. Based on the parametric study, some interesting conclusions have been obtained which may be useful for the practical application of MSFP.

Jerzy Wróblewski’s Concept of Legal Interpretation in its Axiological and Epistemological Context

2020 ◽  
Vol 45 (2-3) ◽  
pp. 217-228
Author(s):  
Tomasz Bekrycht
Keyword(s):  
Theoretical Model ◽  
Point Of View ◽  
Legal Interpretation ◽  
Judicial Interpretation ◽  
Practical Application ◽  
Philosophy Of Law ◽  
Legal Research ◽  
Huge Impact ◽  
The Law

The work of Jerzy Wróblewski has had a huge impact not only on the theory and philosophy of law, both in Poland and internationally, but also on the whole of ​​jurisprudence, especially the fields of doctrinal legal research and the practical application of the law (in particular on adjudication). The aim of this study is to present one of Wróblewski’s most influential concepts, namely the theoretical model of judicial interpretation, from the point of view of axiology and epistemology in the field of jurisprudence.

A THEORETICAL MODEL FOR PORTFOLIO OPTIMIZATION DURING CRISIS

2016 ◽  
Vol 78 (6-5) ◽  
Author(s):  
Colin Cheong Kiat Gan ◽  
Sudarso Kaderi Wiryono ◽  
Deddy Priatmodjo Koesrindartoto ◽  
Budhi Arta Surya
Keyword(s):  
Risk Factors ◽  
Theoretical Model ◽  
Portfolio Optimization ◽  
Risk Measures ◽  
Risk Measure ◽  
Expected Returns ◽  
Practical Application ◽  
Generalized Hyperbolic Distribution ◽  
Subprime Mortgage ◽  
Hyperbolic Distribution

The premise of this paper is providing a theoretical model for a novel way to portfolio optimization using generalized hyperbolic distribution during crisis with risk measures, expected shortfall and standard deviation. Getting good expected returns from investing in portfolio assets like stocks, bonds and currencies during crisis period chosen is harder where the risks cannot be diverted because of disruptive financial jolts i.e. sudden and unprecedented events like subprime mortgage crises in 2008. Multivariate generalized hyperbolic distribution on joint distribution of risk factors from stocks, bonds and currencies is used because it can simplify the risk factors calculation by allowing them to be linearized. The results show the premise is true. The contributions are discovering both the appropriate probability distribution and risk measure will determine whether the portfolio is optimal or not. The practical application will be taking care of the risk to take care of the profit.

Spiral Power Springs. Part 2—Design

1971 ◽  
Vol 93 (2) ◽  
pp. 676-682 ◽  
Author(s):  
C. A. Queener ◽  
G. E. Wood
Keyword(s):  
Theoretical Model ◽  
Shape Factor ◽  
Empirical Equation ◽  
Logarithmic Spiral ◽  
Companion Paper ◽  
Theoretical Equation ◽  
Extended Model ◽  
Practical Application ◽  
Good Accord ◽  
Frictional Hysteresis

The theoretical model developed in a preceding companion paper for predicting the torque-turn behavior of a spiral power spring is extended in an effort to improve the practical applicability. A theoretical equation based on springback theory is developed for computing the shape factor in the logarithmic spiral and an empirical equation for calculating the magnitude of frictional hysteresis is obtained. The extended model is tested with two springs and the experimental and calculated results are in good accord. The computation procedure involved in practical application of the extended model for spring design is discussed.

scholarly journals The Determination and Practical Application the Kinetic Constants of Destruction of Rocks with Modified Zhurkov’s Formula

2018 ◽  
Vol 41 ◽  
pp. 01030
Author(s):  
Dmitry Sirota ◽  
Vadim Ivanov
Keyword(s):  
Activation Energy ◽  
Theoretical Model ◽  
Activation Volume ◽  
Kinetic Constants ◽  
Time To Failure ◽  
Practical Application ◽  
Single Formula ◽  
Destruction Of Rocks ◽  
Kinetic Concept

Any kind of destruction is bound to microckracks. One of the theoretical model of microcracking is kinetic concept of strength (KCS) by S.N. Zhurkov. This theory allows to associate the time to failure with the activation energy and activation volume in single formula. But however, there are options for destruction in which this formula is incorrect. In this article we presents new modification of Zhurkov’s formula. Also, we present two possible practice applications of kinetic constants of the destruction.

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