scholarly journals Magnetic circuit optimization of linear dynamic actuators

ACTA IMEKO ◽  
2021 ◽  
Vol 10 (3) ◽  
pp. 134
Author(s):  
Laszlo Kazup ◽  
Angela Varadine Szarka
Keyword(s):  
Magnetic Circuit ◽  
Movement Control ◽  
Circuit Optimization ◽  
Energy Recuperation ◽  
Wide Range ◽  
Basic Goal ◽  
Efficient Construction ◽  
Linear Movement ◽  
Further Development ◽  
Is Design

<p class="Abstract">Contactless braking methods (with capability of energy recuperation) are more and more widely used and they replace the traditional abrasive and dissipative braking techniques. In case of rotating motion, the method is trivial and often used nowadays. But when the movement is linear and fast alternating, there are only a few possibilities to break the movement. The basic goal of research project is to develop a linear braking method based on the magnetic principle, which enables the efficient and highly controllable braking of alternating movements. Frequency of the alternating movement can be in wide range, aim of the research to develop contactless braking method for vibrating movement for as higher as possible frequency. The research includes examination and further development of possible magnetic implementations and existing methods, so that an efficient construction suitable for the effective linear movement control can be created. The first problem to be solved is design a well-constructed magnetic circuit with high air gap induction, which provides effective and good dynamic parameters for the braking devices. The present paper summarizes the magnetostatics design of “voice-coil linear actuator” type actuators and the effects of structure-related flux scattering and its compensation.</p>

Application of TEM to Deformation, Wear, and Fracture of Ceramics

1974 ◽  
Vol 32 ◽  
pp. 472-473
Author(s):  
B. J. Hockey
Keyword(s):  
Wear Resistance ◽  
High Temperature ◽  
Mechanical Behavior ◽  
Brittle Materials ◽  
High Temperature Strength ◽  
Wide Range ◽  
Corrosive Environments ◽  
Further Development

Ceramics, such as Al2O3 and SiC have numerous current and potential uses in applications where high temperature strength, hardness, and wear resistance are required often in corrosive environments. These materials are, however, highly anisotropic and brittle, so that their mechanical behavior is often unpredictable. The further development of these materials will require a better understanding of the basic mechanisms controlling deformation, wear, and fracture.The purpose of this talk is to describe applications of TEM to the study of the deformation, wear, and fracture of Al2O3. Similar studies are currently being conducted on SiC and the techniques involved should be applicable to a wide range of hard, brittle materials.

The functions and positions of political parties in consociational democracies: theoretical and empirical contexts

2020 ◽  
pp. 28-33
Author(s):  
O. Morhuniuk
Keyword(s):  
Political Parties ◽  
The Netherlands ◽  
Party System ◽  
Party Competition ◽  
European Countries ◽  
The Past ◽  
Democratic Regimes ◽  
Wide Range ◽  
Key Aspects ◽  
Further Development

An article is devoted to the analysis of the functions and formats of political parties in consociational democracies. In particular, it is defined that parties that represent the interests of certain subcultures in society and that reach a consensus among themselves at the level of political agreements are called segmental. At the same time, parties that encapsulate different subgroups of the society that cooperate inside the party within main features of the consociational theory (grand coalition, mutual veto, proportionality in representations, and independence of segments or society subcultures) are called consociational. The theory of consociationalism has received a wide range of theoretical additions and criticism from political scientists over the past fifty years. And while political parties should have been, by definition, one of the key aspects of research within such democratic regimes (parties are part of large coalitions and agents of representation of certain subcultures), there is very scarce number of literature that focuses on this aspect. Therefore, the presented article provides a description of the functions of political parties that could be observed as inside their subcultures as well as in interaction with other segmental parties. Based on the experience of two European countries in the period of “classical” consociationalism (Belgium and the Netherlands), we explain the functions of the parties we have defined in such societies with examples of relevant consociational practices in them. Simultaneously with the analysis of segmental parties, the article also offers the characteristics of consociational parties. The emergence of such parties has its own institutional and historical features. The way of further development of the party system and the level of preservation of consociational practices makes it possible to understand the nature of changes in the societies. Similarly, the analysis of the forms of party competition and interaction between segmental parties makes it possible to outline the forms of those consociational changes that are taking place in the research countries.

scholarly journals Tunable aziridinium ylide reactivity: non-covalent interactions enable divergent product outcomes

2021 ◽  
Author(s):  
Kate Nicastri ◽  
Soren Zappia ◽  
Jared Pratt ◽  
Julia Duncan ◽  
Ilia Guzei ◽  
...  
Keyword(s):  
Chemical Space ◽  
Steric Effects ◽  
Computational Studies ◽  
Rapid Preparation ◽  
Rotational Barriers ◽  
Wide Range ◽  
Non Covalent Interactions ◽  
Further Development ◽  
Covalent Interactions

Methods for rapid preparation of densely functionalized and stereochemically complex N-heterocyclic scaffolds are in demand for exploring potential new bioactive chemical space. This work describes experimental and computational studies to better understand the features of aziridinium ylides as intermediates for the synthesis of highly substituted dehydromorpholines. The development of this chemistry has enabled the extension of aziridinium ylide chemistry to the concomitant formation of both a C–N and a C–O bond in a manner that preserves the stereochemical information embedded in the substrate. The chemistry is tolerant of a wide range of functionalities that can be employed for DNA-encoded library (DEL) synthesis to prepare diverse libraries of heterocycles with potential bioactivity. In addition, we have uncovered several key insights that describe the importance of steric effects, rotational barriers around the C–N bond of the aziridinium ylide, and non-covalent interactions (NCIs) on the ultimate reaction outcome. These critical insights will assist in the further development of this chemistry to generate novel and complex N-heterocycles that will further expand complex amine chemical space.

scholarly journals FORMATION OF APPROACHES TO INTERNATIONAL COOPERATION IN THE FIELD OF HIGHER EDUCATION

2019 ◽  
Vol 7 (6) ◽  
pp. 727-731
Author(s):  
Margarita Anatolyevna Ganyushina ◽  
Svetlana Nikolaevna Kurbakova ◽  
Elena Grigorievna Galizina ◽  
Victoria Valerievna Lopatinskaya ◽  
Natalya Yevgenievna Ryazanova
Keyword(s):  
Higher Education ◽  
International Cooperation ◽  
Formal Education ◽  
Educational Process ◽  
Point Of View ◽  
Educational Opportunities ◽  
Wide Range ◽  
The Future ◽  
Further Development ◽  
Important Basis

Purpose of the study: The paper is devoted to the formation of approaches to international cooperation in the field of higher education. Main Findings: It has been established that in the future, there is a need for broad initiatives from all countries for the qualitative improvement of higher education. It has been determined that the most important basis for the future prosperity of the world economy and society is a strong and diverse training of young people. Applications of this study: From the point of view of further development of new educational information means, the importance of non-formal education integrated into the educational process will grow. The originality of this study: It has been proved that self-education will play an increasing role. In the field of higher education, the cooperation between different partners and a wide range of different educational opportunities will be developed in order to give everyone the opportunity to improve their knowledge, both in the personal and professional sphere.

Implementation of the principles, standards and rules of international customs law: individual and overall levels

2021 ◽  
pp. 102-111
Author(s):  
Serhii Perepolkin
Keyword(s):  
International Law ◽  
Practical Significance ◽  
Clear Understanding ◽  
The European Union ◽  
Public Authorities ◽  
Customs Unions ◽  
Wide Range ◽  
And Control ◽  
Further Development

Purpose. The purpose of the study is to submit to the discussion of domestic international lawyers a proposal to introduce the use in scientific and educational works of the classification of the implementation of the principles, norms and standards of international customs law into two types: individual and overall. Methodology. In order to achieve the goal of the study, have been analyzed scientific approaches to understand the implementation of international law and the classification of its types. In article have been studied an Implementation articles developed under the auspices of the Customs Agreements Cooperation Council; recommendations and resolutions, conventions of the Member States of the European Union, current international agreements and other acts of Ukrainian legislation on customs matters. Results. In the article it was substantiated that individual implementation along with the states can be carried out also by separate customs territories which have full autonomy in the realization of foreign trade; customs unions; economic unions; international organizations and other participants in international customs relations. The joint implementation of the principles, norms, and standards of international customs law is carried out by two or more of its subjects simultaneously. To achieve this goal, the subjects of international customs law can use a wide range of law-making, organizational, coordination, information and control tools. Scientific novelty. It was proved that the classification of the implementation of principles, norms, and standards of international customs law into individual and overral, in contrast to its differentiation into domestic and international, most accurately reflects all types of subjects of international customs law capable of participating in such activities. Practical significance. The introduction of the classification of the implementation of principles, norms, and standards into individual and joint, will contribute to the further development of research in this area, as well as the development of a clear understanding of the implementation of officials of public authorities of Ukraine.

MMT

2022 ◽  
pp. 1077-1089
Author(s):  
Pekka Mäkiaho ◽  
Katriina Vartiainen ◽  
Timo Poranen
Keyword(s):  
Design Science ◽  
Science Research ◽  
Project Managers ◽  
Project Work ◽  
Software Project ◽  
Upper Management ◽  
Monitoring Software ◽  
Further Development ◽  
Is Design

This paper presents the Metrics Monitoring Tool (MMT) that was developed in university graduate and undergraduate courses on software project work in 2014-2016. The tool aims to support project members, project managers and upper management in reporting and monitoring software and project metrics for their easier and more effective utilization. The paper covers the development process of the tool, evaluation assessment, its current composition and features. The paradigm applied in this study is Design Science Research and the methods for evaluation include prototype, expert evaluation, case study and technical experiment. Data was collected from the tool users by two questionnaires. As a result, MMT was evaluated to ease the metrics handling, while several aspects related to the richness of functionalities and usability still require further development.

scholarly journals Signal Strength Enhancement of Magnetostrictive Patch Transducers for Guided Wave Inspection by Magnetic Circuit Optimization

2019 ◽  
Vol 9 (7) ◽  
pp. 1477 ◽  
Author(s):  
Jianjun Wu ◽  
Zhifeng Tang ◽  
Keji Yang ◽  
Fuzai Lv
Keyword(s):  
Magnetic Field ◽  
Magnetic Circuit ◽  
Energy Conversion Efficiency ◽  
Wave Generation ◽  
Guided Wave ◽  
Shear Mode ◽  
Circuit Optimization ◽  
Affecting Factors ◽  
Long Distance ◽  
Dynamic Magnetic Field

Magnetostrictive patch transducers (MPT) with planar coils are ideal candidates for shear mode generation and detection in pipe and plate inspection with the advantages of flexibility, lightness and good directivity. However, the low energy conversion efficiency limits the application of the MPT in long distance inspection. In this article, a method for the enhancement of the MPT was proposed by dynamic magnetic field optimization using a soft magnetic patch (SMP). The SMP can reduce the magnetic resistance of the magnetic circuit, which increases the dynamic magnetic field intensity in the magnetostrictive patch during wave generation and restricts the induced dynamic magnetic field within the area around the coils for sensing during wave detection. Numerical simulations carried out at different frequencies verified the improvement of the dynamic magnetic fields by the SMP and influence of different affecting factors. The experimental validations of the signal enhancement in wave generation and detection were performed in an aluminum plate. The amplitude magnification could reach 12.7 dB when the MPTs were covered by the SMPs. Based on the numerical and experimental results, the SMP with a large relative permeability and thickness and close fitting between the SMP and coils were recommended when other application conditions were met.

scholarly journals A Survey of Information Entropy Metrics for Complex Networks

Entropy ◽  
2020 ◽  
Vol 22 (12) ◽  
pp. 1417
Author(s):  
Yamila M. Omar ◽  
Peter Plapper
Keyword(s):  
Probability Distribution ◽  
Literature Review ◽  
Complex Networks ◽  
Information Entropy ◽  
Future Research ◽  
Wide Range ◽  
Growing Body ◽  
Narrative Literature ◽  
Narrative Literature Review ◽  
Further Development

Information entropy metrics have been applied to a wide range of problems that were abstracted as complex networks. This growing body of research is scattered in multiple disciplines, which makes it difficult to identify available metrics and understand the context in which they are applicable. In this work, a narrative literature review of information entropy metrics for complex networks is conducted following the PRISMA guidelines. Existing entropy metrics are classified according to three different criteria: whether the metric provides a property of the graph or a graph component (such as the nodes), the chosen probability distribution, and the types of complex networks to which the metrics are applicable. Consequently, this work identifies the areas in need for further development aiming to guide future research efforts.

scholarly journals The Applications and Obstacles of Metabonomics in Traditional Chinese Medicine

2012 ◽  
Vol 2012 ◽  
pp. 1-4 ◽  
Author(s):  
Ping Liu ◽  
Songlin Liu ◽  
Daizhi Tian ◽  
Ping Wang
Keyword(s):  
Mass Spectrometry ◽  
Chinese Medicine ◽  
Traditional Chinese Medicine ◽  
Gas Chromatography Mass Spectrometry ◽  
Liquid Chromatography Mass Spectrometry ◽  
Analytical Technique ◽  
Chromatography Mass Spectrometry ◽  
Wide Range ◽  
Further Development ◽  
Analytical Technology

In the recent years, a wide range of metabonomic technologies are widely used in the modern research of traditional chinese medicine (TCM). At present, the most prevailing methods for TCM research are mainly nuclear magnetic resonance (NMR), gas chromatography-mass spectrometry (GC-MS), and liquid chromatography-mass spectrometry (LC-MS). With these techniques, metabonomics will help to understand syndromes, efficacy and toxicity of TCM. However, every analytical technique has its advantages and drawbacks, and there exist some obstacles of its applications on TCM. So, we discuss metabonomics in TCM and analyze some problems of its applications to study TCM in recent years. We believe that with the further development of metabonomic analytical technology, especially multianalysed techniques, metabonomics will greatly promote TCM research and be beneficial to the modernization of TCM.

Design of HTS Magnetically Controlled Saturable Reactor

2013 ◽  
Vol 380-384 ◽  
pp. 2982-2985
Author(s):  
Hong Da Dong
Keyword(s):  
High Temperature ◽  
High Voltage ◽  
Large Scale ◽  
Reactive Power ◽  
Magnetic Circuit ◽  
Reactive Power Compensation ◽  
Model Design ◽  
Power Capacity ◽  
Wide Range ◽  
Small Capacity

There are many problems for traditional reactive power compensation devices to be applied in the grid, such as discontinuous adjustment, small capacity, complex control and harmonics. This paper aims to study a high temperature superconducting magnetically controlled saturable reactor (HTS MCSR), which has a wide range of stepless adjustment. It has a good application prospect in large scale reactive power compensation devices. Based on research of theory and core structure, a shaped-cylinder core is proposed. By means of calculation of saturable reactor and analysis of algebraic and magnetic circuit model, design of 220V HTS MCSR is finished. Results of normal conductive reactor prototype and simulations verify that the range of inductance adjustment is very wide. Furthermore, conceptual design of 35kV HTS MCSR confirms its reactive power capacity is so large, therefore, it is suitable for high voltage power system.

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