scholarly journals VARIETY AND PRINCIPLES OF COOPERATION OF DOUBLE CROWNS OF TELESCOPIC CONNECTIN

2019 ◽  
pp. 49-54
Author(s):  
Yu. Ye. Tarashevska ◽  
Ye. G. Shyyan

For today, problem of fixing of partial removable prostheticappliances, and more precisely it remains not fully decidedthe term of endurance and worn down of friction propertiesof telescopic connections. Therefore, the search for improvement of fixative properties of telescopic connection sremains actual. Material and methods: Analytical study of scientific sources on the problems of replacing defects in dentition with removable dentures with fixation on telescopic crowns. The aim of this work consists in that, to educe, to estimateand compare, on thebasis of the dynamic supervisions, scientific-medical information, views of authors on the role and definition of interaction of double crown sof telescopic connection, especially with the use of auxiliaryel ements of fixing. Appearance of double crowns with a resident interval, offered Strack and Hofmann in 1966, induced scientists to perfect and develop the new auxiliary elements of fixing for the improvement of retention properties of telescopic connections. The process of search took place and takesplace in various ways: - by the use of various materials (gold, ordinary alloys, thermosetting and thermoplastic polymers, powder-like metals and compos); - by the use of different technologies (punching, founding, milling, electrotype, spark-free treatment, 3d printing); - by development of new auxiliary elements ( retention pins, rings, plunger, crossbar, attachments, hobs, petals et al); - by the use of other physical phenomena ( diffusion, dry technicians, vacuum, magneti, rheological properties). The article also highlights the views of scientists on the negative and positive aspects of the proposed technical solutions. It is informed about the proposed radically new system of telescopic connection, which is based on the use of another physical phenomenon - the rheological property of materials. The uses of the known methods, new or improved additional structural elements are mainly based on bringing of those or other changes in the primitive construction of telescopic connection. Analysing the advanced studies of many researchers, it is possible to draw conclusion that advantages of fixing of removable prosthetic appliances by means of the telescopic systems are determined by the row of their possibilities. To basic advantages of double crowns it is possible to take a complete scope the external crown of supporting teeth with simultaneous implementation of retentive, stabilizing, directing and supporting functions, and also distribution of horizontal power components of the functional loading, and wide possibility of choice of the offered additional construction elements extends possibility to the specialists in the rational system of choice of the telescopic fixing. It would be desirable to mark that the telescopic system is theoptimal method of fixing of prosthetic appliance in comparingto another ways of fixing of partial removable prostheticappliance that is confirmed by the researches conducted inthis matter. Conclusion: Thus, it was educed on the basis of review of correspondingliterature, that the best terms for proceeding in masticatoryefficiency, function and aesthetics of the tooh-jaw system removal of deformation of occlusion surface of dentalrows and injuring bite for patients with the partial loss of teethit is succeeded to obtain at the use removable prostheticappliances with the telescopic system of fixing, especially withthe use of additional structural elements.

2018 ◽  
Vol 11 (4) ◽  
pp. 87-98
Author(s):  
Abdullah Alamri

Healthcare systems have evolved to become more patient-centric. Many efforts have been made to transform paper-based patient data to automated medical information by developing electronic healthcare records (EHRs). Several international EHRs standards have been enabling healthcare interoperability and communication among a wide variety of medical centres. It is a dual-model methodology which comprises a reference information model and an archetype model. The archetype is responsible for the definition of clinical concepts which has limitations in terms of supporting complex reasoning and knowledge discovery requirements. The objective of this article is to propose a semantic-mediation architecture to support semantic interoperability among healthcare organizations. It provides an intermediate semantic layer to exploit clinical information based on richer ontological representations to create a “model of meaning” for enabling semantic mediation. The proposed model also provides secure mechanisms to allow interoperable sharing of patient data between healthcare organizations.


1885 ◽  
Vol 176 ◽  
pp. 307-342 ◽  

1. The tendency to apply dynamical principles and methods to explain physical phenomena has steadily increased ever since the discovery of the principle of the Conservation of Energy. This discovery called attention to the ready conversion of the energy of visible motion into such apparently dissimilar things as heat and electric currents, and led almost irresistibly to the conclusion that these too are forms of kinetic energy, though the moving bodies must be infinitesimally small in comparison with the bodies which form the moving pieces of any of the structures or machines with which we are acquainted. As soon as this conception of heat and electricity was reached mathematicians began to apply to them the dynamical method of the Con­servation of Energy, and many physical phenomena were shown to be related to each other, and others predicted by the use of this principle; thus, to take an example, the induction of electric currents by a moving magnet was shown by von Helmholtz to be a necessary consequence of the fact that an electric current produces a magnetic field. Of late years things have been carried still further; thus Sir William Thomson in many of his later papers, and especially in his address to the British Association at Montreal on “Steps towards a Kinetic Theory of Matter,” has devoted a good deal of attention to the description of machines capable of producing effects analogous to some physical phenomenon, such, for example, as the rotation of the plane of polarisation of light by quartz and other crystals. For these reasons the view (which we owe to the principle of the Conservation of Energy) that every physical phenomenon admits of a dynamical explanation is one that will hardly be questioned at the present time. We may look on the matter (including, if necessary, the ether) which plays a part in any physical phenomenon as forming a material system and study the dynamics of this system by means of any of the methods which we apply to the ordinary systems in the Dynamics of Rigid Bodies. As we do not know much about the structure of the systems we can only hope to obtain useful results by using methods which do not require an exact knowledge of the mechanism of the system. The method of the Conservation of Energy is such a method, but there are others which hardly require a greater knowledge of the structure of the system and yet are capable of giving us more definite information than that principle when used in the ordinary way. Lagrange's equations and Hamilton's method of Varying Action are methods of this kind, and it is the object of this paper to apply these methods to study the transformations of some of the forms of energy, and to show how useful they are for coordinating results of very different kinds as well as for suggesting new phenomena. A good many of the results which we shall get have been or can be got by the use of the ordinary principle of Thermodynamics, and it is obvious that this principle must have close relations with any method based on considerations about energy. Lagrange’s equations were used with great success by Maxwell in his ‘Treatise on Electricity and Magnetism,’ vol. ii., chaps. 6, 7, 8, to find the equations of the electromagnetic field.


2021 ◽  
Vol 12 (3) ◽  
pp. 668
Author(s):  
Nataliia DEMIANENKO ◽  
Ilona YASNOLOB ◽  
Oleg GORB ◽  
Oleksii Zoria ◽  
Liudmyla CHIP ◽  
...  

The article is devoted to considering the peculiarities of startup ecosystem formation. Modern theoretical views on the definition of startup ecosystem have been studied. The author’s definition of “startup ecosystem” term has been given. Innovation and entrepreneurial ecosystems aimed at creating innovative products and services by startup companies have been analyzed. The structural elements of startup ecosystem under endogenous and exogenous changes in the business environment have been singled out. The situation of startup development in Ukraine and their further prospects have been analyzed. Emphasis has been placed on the formation of entrepreneurial universities as an important component of the ecosystem. The experience of leading countries in the implementation and formation of startup ecosystem has been studied and adapted.


Author(s):  
Mukhammadolim Mukhammadsidiqov ◽  
◽  
Abrar Turaev ◽  

This article examines the theoretical and methodological aspects of the problem of energy security, which is becoming a topical geopolitical issue today. In particular, the interpretations of the concept of energy security, its transformation into a geopolitical factor and the structural elements of energy security are highlighted. The focus is on modern approaches and trends in energy security, as well as theoretical and methodological issues in the analysis of regional aspects of energy security. At the same time, efforts will be made to reveal the scale of threats to energy security and the destructive factors that make energy security relevant, their impact on interstate relations and political destabilization. The article summarizes the author's definition of the concept of energy security.


2021 ◽  
Vol 39 (3) ◽  
pp. 118-122
Author(s):  
M. A. Magomedova ◽  

In the current legislation of the Russian Federation, there is no concept of a land dispute, which causes difficulties in determining the competence of an arbitration court in cases in which the object of the dispute is land. The article analyzes the general legal concept of a dispute and the sectoral concept of a land dispute developed by scientists. The author identified the characteristic features of a land dispute and its structural elements. The work reveals the influence of the structural elements of the land dispute on the type of production in which the dispute will be considered. In addition, the author concludes that the correct definition of the structural elements of the land dispute enables the arbitration court to determine the appropriate persons participating in the case, the subject of proof, the relevance and admissibility of evidence, and ultimately make a lawful and wellgrounded court decision.


Author(s):  
Jyri Pakarinen

This chapter discusses the central physical phenomena involved in music. The aim is to provide an explanation of the related issues in an understandable level, without delving unnecessarily deep in the underlying mathematics. The chapter is divided in two main sections: musical sound sources and sound transmission to the observer. The first section starts from the definition of sound as wave motion, and then guides the reader through the vibration of strings, bars, membranes, plates, and air columns, that is, the oscillating sources that create the sound for most of the musical instruments. Resonating structures, such as instrument bodies are also reviewed, and the section ends with a discussion on the potential physical markup parameters for musical sound sources. The second section starts with an introduction to the basics of room acoustics, and then explains the acoustic effect that the human observer causes in the sound field. The end of the second section provides a discussion on which sound transmission parameters could be used in a general music markup language. Finally, a concluding section is presented.


Author(s):  
Jens P. Linge ◽  
Ralf Steinberger ◽  
Flavio Fuart ◽  
Stefano Bucci ◽  
Jenya Belyaeva ◽  
...  

The Medical Information System (MedISys) is a fully automatic 24/7 public health surveillance system monitoring human and animal infectious diseases and chemical, biological, radiological and nuclear (CBRN) threats in open-source media. In this article, we explain the technology behind MedISys, describing the processing chain from the definition of news sources, scraping and grabbing articles from the internet, text mining, event extraction with the Pattern-based Understanding and Learning System (PULS, developed by the University of Helsinki), news clustering and alerting, to the display of results. The web interface and service applications are shown from a user’s perspective. Users can display world maps in which event locations are highlighted as well as statistics on the reporting about diseases, countries and combinations thereof and can apply filters for language, disease or location or filters with orthogonal categories, e.g. outbreaks, via their browser. Specific entities such as persons, organizations and locations are identified automatically.


1940 ◽  
Vol 44 (356) ◽  
pp. 653-656
Author(s):  
W. R. Osgood

Explicitly or implicitly the yield strength of a material is often used as a measure of incipient structural damage. With the yield strength determined by conventional methods, however, it cannot be said in general for two structural elements geometrically alike but of different materials that similar loads, producing maximum stresses equal to the yield strengths in the two cases, are simply related to the yield strengths. A definition of yield strength is proposed in this paper which often has the advantage that, for geometrically similar structures of different materials, loads producing maximum stresses equal to the yield strength are proportional to the yield strength.


2020 ◽  
Vol 20 (3) ◽  
pp. 387-411
Author(s):  
Lena Holzer

ABSTRACT This article explores the definition of ‘sportswoman’ as put forward in the Caster Semenya case (2019) and the Dutee Chand case (2015) before the Court of Arbitration for Sport (CAS). It analyses the structural and discursive factors that made it possible for the CAS to endorse a definition that reduces sex and gender to a matter concerning testosterone. By relying on the concept of intersectionality and analytical sensibilities from Critical Legal Studies, the article shows that framing the cases as a matter of scientific dispute, instead of as concerning human rights, significantly influenced the CAS decisions. Moreover, structural elements of international sports law, such as the lack of knowledge of human rights among CAS arbitrators and a history of institutionalising gendered and racialised body norms through sporting regulations, further aided the affirmation of the ‘testosterone rules’.


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