An analytical approach for analysis and optimization of formation of field-effect heterotransistors

2016 ◽  
Vol 12 (4) ◽  
pp. 578-604 ◽  
Author(s):  
Evgeny L. Pankratov ◽  
Elena A. Bulaeva
Keyword(s):  
Heat Transport ◽  
Technological Process ◽  
Multilayer Structure ◽  
Field Effect ◽  
Design Methodology ◽  
Analytical Approach ◽  
Charge Carriers ◽  
Cross Linking ◽  
Content Type ◽  
Time Parameters

Purpose The purpose of this paper is to analyze and optimize the formation of field-effect heterotransistors using analytical approach. The approach makes it possible to analyze mass and heat transport in a multilayer structure without cross-linking of solutions on interfaces between layers of the multilayer structure. The optimization makes it possible to decrease dimensions of the heterotransistors and to increase speed of transport of charge carriers during functioning of the transistors. Design/methodology/approach The authors introduce an analytical approach for analysis of mass and heat transport, which makes it possible to take into account at one time varying in space and time parameters of the transports (diffusion coefficient, heat conduction coefficient, etc.) and nonlinearity of processes. The approach enables analysis of mass and heat transport in a multilayer structure without cross-linking of solutions on interfaces between layers of the multilayer structure and optimises the technological process. The optimization means it is possible to decrease dimensions of field-effect heterotransistors. Findings In this paper the authors introduce an approach to manufacture a field-effect heterotransistor with inhomogeneous doping of channel. Some recommendations to optimize technological process to manufacture more compact distribution of concentration of dopant have been formulated. Originality/value The results are original and the paper provides an approach to the manufacture of a field-effect heterotransistor.

On optimization of growth from gas phase in a vertical reactor with account native convection to improve properties of films

2016 ◽  
Vol 12 (4) ◽  
pp. 712-725 ◽  
Author(s):  
Evgeny L. Pankratov ◽  
Elena A. Bulaeva
Keyword(s):  
Gas Phase ◽  
Heat Transport ◽  
Induction Heating ◽  
Design Methodology ◽  
Analytical Approach ◽  
Growth Zone ◽  
Epitaxial Layers ◽  
Content Type ◽  
Time Parameters ◽  
Account Variation

Purpose The purpose of this paper is to: analyze the changing properties of epitaxial layers, manufactured in the considered reactor, with the changing parameters of the growth taking into account native convection; and development of the most common analytical approach to describe the technological process. Design/methodology/approach In this paper a vertical reactor for gas phase epitaxy is considered that consists of an external casing, a keeper of substrate with a substrate and a spiral around the casing in area of the growth zone to generate induction heating in order to activate the chemical reactions in the decay of reagents and the growth of the epitaxial layer by using the reagents. The authors introduce an analytical approach to analyze nonlinear mass and heat transport with account variation in space and time parameters. Findings The authors find conditions to improve properties of epitaxial layers. Originality/value Growth regimes at atmospheric and low pressure have been compared and analyzed for their influence of the native convection on the growth of the epitaxial layers. Accounting for the calculated results, recommendations have been formulated to improve the properties of the epitaxial layers.

Influence of temperature of substrate during the growth of a heterostructure on properties of materials

2017 ◽  
Vol 13 (2) ◽  
pp. 326-330
Author(s):  
Evgeny L. Pankratov ◽  
Elena Alexeevna Bulaeva
Keyword(s):  
Technological Process ◽  
Design Methodology ◽  
Analytical Approach ◽  
Cross Linking ◽  
Content Type ◽  
Influence Of Temperature ◽  
Properties Of Materials

Purpose The purpose of this paper is to consider the changing of profile of heterostructure during growth with changing of temperature of substrate. Design/methodology/approach The authors introduced an analytical approach for the analysis of technological process. Findings The authors formulate the condition for minimization of changing of the profile. Originality/value The approach gives a possibility to analyze mass and heat transports in a heterostructure without cross-linking of solutions on interfaces between layers of the heterostructure with account nonlinearity of these transports and variation in time of their parameters.

The role of Muslim women in managing the family during crisis: corona pandemic as a model

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Haifa F. Fawaris
Keyword(s):  
Significant Role ◽  
Design Methodology ◽  
Analytical Approach ◽  
Muslim Women ◽  
Muslim Woman ◽  
Content Type ◽  
Study Results ◽  
The Family ◽  
Mental Characteristics

Purpose This study aims to clarify the role of Muslim women in managing their families during the corona pandemic crisis. To achieve this aim, the researcher applied the descriptive and analytical approach. Design/methodology/approach The Muslim women have had a prominent position consistent with the physical, psychological and mental characteristics that Allah has created them. This status is shown by: affirming their rights in all areas of life; affirming everything that preserved the dignity of women before Islam; and correcting all the conditions that detracted their dignity before the advent of Islam and making them responsible in public Islamic life on the level of: preserving Islam, spreading the Islamic call and achieving the civilization advancement of the Muslim nation. Findings The study resulted in many significant results. The most important one of the study results was that, in the context of woman rights and responsibilities she had assumed in Islam, the Muslim woman had a prominent position in Islam. In addition, the mother in the Muslim family had a significant role as a leader, who is capable of managing the family in corona crisis and supporting family members in all aspects such as faith, intellectual endeavors, psychological, social and health, so that they are real leaders. Originality/value The study recommends carrying out educational studies that identify and show the role of institutions other than the family in managing emergency crises.

Resistive torque in permanent magnet couplings operating through a conductive wall

2017 ◽  
Vol 36 (4) ◽  
pp. 1120-1133
Author(s):  
Thomas Rezek Matsumoto ◽  
Ivan Chabu
Keyword(s):  
Permanent Magnet ◽  
Design Methodology ◽  
Analytical Approach ◽  
Eddy Currents ◽  
Experiment Data ◽  
Content Type ◽  
Analytical Formulation ◽  
Resistive Torque ◽  
Torque Transmission ◽  
Coupling Performance

Purpose The purpose of this paper is to propose an analytical approach to determine the resistive torque caused by a conductive wall between the rotors of axial permanent magnet couplings. In this configuration, relative motion between the coupling rotors and the wall generates a resistive torque that is a consequence of the induced eddy currents in this barrier. Therefore, such induced resistive torque implies a reduction in the permanent magnet coupling performance, that is, its torque transmission capacity. Design/methodology/approach The developed resistive torque analytical formulation was based on eddy-current brakes of previous studies. To validate the proposed method, tests were conducted in a prototype and results were compared with analytical ones. Findings The analytical method showed a good correlation with the experiment data. Furthermore, a major degradation of the coupling capability to transmit torque was found because of the conductive wall presence, enhancing the importance of predicting such phenomenon when designing these devices. Originality/value A novel direct assessment of the resistive torque while in motion is presented in this paper. These measurements were of great importance to accurately compare the analytical and experimental data.

scholarly journals An approach to model and optimization of manufacturing of an enhanced swing differential Colpitts oscillator. on influence of miss-match induced stress

2020 ◽  
Vol 12 (02) ◽  
pp. 12-32
Author(s):  
E.L. Pankratov ◽  
Keyword(s):  
Integrated Circuits ◽  
Ion Implantation ◽  
Heat Transport ◽  
Field Effect ◽  
Analytical Approach ◽  
Field Effect Transistors ◽  
Radiation Defects ◽  
Colpitts Oscillator ◽  
Induced Stress ◽  
Specific Configuration

In this paper we introduce an approach to increase density of field-effect transistors framework an enhanced swing differential Colpitts oscillator. Framework the approach we consider manufacturing the oscillator in heterostructure with specific configuration. Several required areas of the heterostructure should be doped by diffusion or ion implantation. After that dopant and radiation defects should by annealed framework optimized scheme. We also consider an approach to decrease value of mismatch-induced stress in the considered heterostructure. We introduce an analytical approach to analyze mass and heat transport in heterostructures during manufacturing of integrated circuits with account mismatch-induced stress

scholarly journals On Model of Manufacturing of an Integrated Circuits Based on Hetero-Structures Under Influence of Mismatch-Induced Stress and Porosity of Materials

2021 ◽  
Vol 23 (1) ◽  
pp. 1-53
Author(s):  
E. L. Pankratov ◽  
Keyword(s):  
Integrated Circuits ◽  
Ion Implantation ◽  
Heat Transport ◽  
Field Effect ◽  
Analytical Approach ◽  
Field Effect Transistors ◽  
Radiation Defects ◽  
Induced Stress ◽  
Specific Configuration

In this paper, we introduce an approach to increase density of field-effect transistors framework a downconversion mixer circuit. Framework the approach we consider manufacturing the mixer in heterostructure with specific configuration. Several required areas of the heterostructure should be doped by diffusion or ion implantation. After that dopant and radiation defects should be annealed by framework optimized scheme. We also consider an approach to decrease value of mismatch-induced stress in the considered heterostructure. We introduce an analytical approach to analyze mass and heat transport in heterostructures during manufacturing of integrated circuits with account mismatch-induced stress.

On approach to model stabilization of anomalous distribution of concentration of radiation defects in a multilayer structure

2018 ◽  
Vol 14 (5) ◽  
pp. 984-998
Author(s):  
Evgeny L. Pankratov
Keyword(s):  
Multilayer Structure ◽  
Design Methodology ◽  
Multilayer Structures ◽  
Radiation Defects ◽  
Boundary Problems ◽  
Content Type

Purpose The purpose of this paper is to introduce a model of redistribution of point radiation defects, interaction between themselves and redistribution of their simplest complexes in a multilayer structure. The model gives a possibility to qualitatively describe nonmonotonicity of distributions of concentrations of radiation defects on interfaces between layers of the structure, which recently was found experimentally. To take into account the nonmonotonicity, the authors complement the model for the analysis of distribution of concentration of radiation defects, which were recently used in the literature. To analyze the model, the authors used an approach of solution of boundary problems, which could be used without crosslinking of solutions on interfaces between layers of the considered multilayer structures. Design/methodology/approach The authors introduce a model of redistribution of point radiation defects, interaction between themselves and redistribution of their simplest complexes in a multilayer structure. The model gives a possibility to qualitatively describe nonmonotonicity of distributions of concentrations of radiation defects on interfaces between layers of the structure, which recently was found experimentally. To take into account the nonmonotonicity, the authors complement the model for analysis of distribution of concentration of radiation defects, which were recently used in the literature. To analyze the model, the authors used an approach of solution of boundary problems, which could be used without crosslinking of solutions on interfaces between layers of the considered multilayer structures. Findings The authors obtain better agreement of obtain results in comparison with recently obtained results in the literature. Originality/value The results are original.

scholarly journals Building a new academic library Web site

2015 ◽  
Vol 32 (8) ◽  
pp. 1-15
Author(s):  
Ann Johnston ◽  
Pamela Greenlee ◽  
Matthew W Marcukaitis ◽  
Ian M Lopshire
Keyword(s):  
Technological Process ◽  
Web Site ◽  
Design Methodology ◽  
Academic Library ◽  
University Administrators ◽  
Content Type ◽  
Team Members ◽  
Efficient Approach ◽  
Methodical Approach ◽  
Web Developers

Purpose – The Benner Library Web site at Olivet Nazarene University was targeted for an update and those responsible desired a systematic, efficient approach to the process. Design/methodology/approach – The project needed clear goals and careful coordination of all stakeholders, including all levels of patrons, library professionals and staff and university administrators. Findings – The methodical approach proved to be time consuming but effective. Originality/value – A team composed of Web developers, programmers and graphic designers accomplished the technological process, but communication between team members and stakeholders was essential.

Russian agon and the quest for theoretical sociology

foresight ◽  
2017 ◽  
Vol 19 (4) ◽  
pp. 376-385
Author(s):  
Sergey B. Kulikov
Keyword(s):  
Transition Economies ◽  
Design Methodology ◽  
Analytical Approach ◽  
Propositional Attitudes ◽  
Content Type ◽  
The Past ◽  
Knowledge Based ◽  
Epistemological Analysis ◽  
Practical Implications ◽  
Theoretical Developments

Purpose The purpose of this paper is to represent an epistemological analysis of Russian sociological scholarship. Design/methodology/approach The analytical approach that allows reducing the particular representations within the sum of propositions is the methodological base of the paper. Clearing of propositional attitudes explains the basic communications in a thought of researchers. The circle of grounds available to achievement of intuitively noticed purposes defines the preferences of researchers in general. Findings The author proves that the theoretical developments in the Russian sociology are possible as a derivative from the development of questions, which are raised nowadays in worldwide science, but possible in a view of original development of questions, which were raised in worldwide science in the past. Research limitations/implications The Russian sociology represents a part of the European humanities, which is based on the various forms of theoretical combat or agonality. Practical implications The author shows the ways out of the theoretical combat or agonality. Social implications The research clarifies the perspectives for increasing of the knowledge-based society in Russia. The author analyzes the concept of Russia as a paradigmatic society, particularly in the context of transition economies. Originality/value In general, the author concludes that the pro-argument with respect to theoretical developments is weaker than the contra-argument with respect to theoretical developments. This paper has revealed the model within which extreme positions can be reconciled.

scholarly journals Covid-19 protocols: assessing construction site workers compliance

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Michael Ayodele Olukolajo ◽  
Abiodun Kolawole Oyetunji ◽  
Ifeoluwa Benjamin Oluleye
Keyword(s):  
Research Method ◽  
Design Methodology ◽  
Analytical Approach ◽  
Preventive Measures ◽  
Construction Site ◽  
Construction Sites ◽  
Protective Measures ◽  
Content Type ◽  
Contact Precautions ◽  
Structured Questionnaire

Purpose This paper aims to investigate construction site workers’ compliance with various coronavirus (Covid-19) protocols while working on construction sites. Design/methodology/approach This survey was conducted at the end of the imposed lockdown following Nigeria’s upsurge of the Covid-19 pandemic. The survey research method was adopted for the study using a structured questionnaire administered to 246 construction site workers under strict Covid-19 preventive measures. The data was complemented through personal observations of the study site activities. The results were analysed using frequency tables and a factor analytical approach. Findings The preventive measures in place on construction sites can be classified into personal protective measures, good etiquette/manners, contact precautions and prompt actions. Although the workers claimed to be aware of the Covid-19 pandemic, their disposition towards the preventive measures on construction sites is worrisome. Hence, their level of compliance with the protocols could mitigate the spread of the virus. Originality/value This paper fulfils an identified gap to study the need to promote public health by mitigating the global pandemic’s spread in areas where social distancing cannot be easily observed.

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