scholarly journals Improvement of methods of diagnostics, classification of tooth enamel microfissures and of method for evaluating the effectiveness of their treatment

2019 ◽  
Vol 85 (4) ◽  
pp. 121-126
Author(s):  
I.I. Zabolotnaia
Keyword(s):  
Tooth Enamel ◽  
Dental Enamel ◽  
Clinical Diagnostics ◽  
Optical Systems ◽  
Cervical Lesions ◽  
Lighting Condition ◽  
Prophylactic Measures ◽  
Hard Tissues ◽  
The Given

In clinical practice it is often diagnosed precervical lesions: wedge-shaped defect, precervical caries and fissures. The scientific research reveals results of application of an electrometric method for diagnostics of microfissures of teeth hard tissues. Use of this method will allow not only to make a pre-clinical diagnostics of the given pathology, but also to evaluate efficiency of the taken treatment-and-prophylactic measures. 16.70 % of cases the type of dental enamel fissures diagnosed before research, depending on complexity of their revealing, mismatched the received results of width of their disclosing. So, before the preparation of precervical pathology, we recommend to classify the diagnosed enamel microfissures of vestibular surface into two types: I – fissures, which are visible after using additional lighting, drying, optical systems, diagnostic dye, determining the electrical resistance, using of transillumination and other additional methods; ІІ – fissures, which are visible to the naked eye under normal lighting condition. Application of the proposed qualification of incomplete microfissures will promote to improving the effectiveness of surgical treatment of cervical lesions of teeth hard tissues.

The Potential of the Russian Language Textbook in the Formation of Primary Schoolchildren’s Communicative Literacy

2018 ◽  
Vol 79 (8) ◽  
pp. 35-40
Author(s):  
M. I. Kuznetsova
Keyword(s):  
Primary School ◽  
Russian Language ◽  
Primary School Children ◽  
Written Text ◽  
Russian Literary ◽  
The Given ◽  
The Russian Language ◽  
Speech Situation ◽  
Linguistic Means

One of the goals of the Russian language course in the primary school is the formation of the communicative literacy. The content of the course should be aimed at understanding the wealth of linguistic means by primary school children; the formation of the ability to detect a violation of linguistic norms and the inadequacy of the linguistic means used in the speech situation; the accumulation of the experience in choosing of linguistic means in accordance with the peculiarities of the speech situation; the creation of oral and written texts that meet the criteria of content, connectivity, compliance with the norms of the Russian literary language. The article considers the classification of exercises that contribute to the formation of communicative literacy. The author gives the examples of exercises where the student acts in different roles: the student is an observer of the speech situation and analyzes the adequacy of the choice of linguistic means; the student is a direct participant in the given speech situation and makes a choice of language facilities; the student is offered to create the speech situation himself, to independently construct an oral and written text.

scholarly journals MultiKOC: Multi-One-Class Classifier Based K-Means Clustering

Algorithms ◽  
2021 ◽  
Vol 14 (5) ◽  
pp. 134
Author(s):  
Loai Abdallah ◽  
Murad Badarna ◽  
Waleed Khalifa ◽  
Malik Yousef
Keyword(s):  
Clustering Algorithm ◽  
Main Idea ◽  
Molecular Classification ◽  
Positive Sample ◽  
Classification Problems ◽  
Multiple Cancer ◽  
Multiple Tumor ◽  
One Class Classifier ◽  
The Given

In the computational biology community there are many biological cases that are considered as multi-one-class classification problems. Examples include the classification of multiple tumor types, protein fold recognition and the molecular classification of multiple cancer types. In all of these cases the real world appropriately characterized negative cases or outliers are impractical to achieve and the positive cases might consist of different clusters, which in turn might lead to accuracy degradation. In this paper we present a novel algorithm named MultiKOC multi-one-class classifiers based K-means to deal with this problem. The main idea is to execute a clustering algorithm over the positive samples to capture the hidden subdata of the given positive data, and then building up a one-class classifier for every cluster member’s examples separately: in other word, train the OC classifier on each piece of subdata. For a given new sample, the generated classifiers are applied. If it is rejected by all of those classifiers, the given sample is considered as a negative sample, otherwise it is a positive sample. The results of MultiKOC are compared with the traditional one-class, multi-one-class, ensemble one-classes and two-class methods, yielding a significant improvement over the one-class and like the two-class performance.

scholarly journals Quantitative Shape-Classification of Misfitting Precipitates during Cubic to Tetragonal Transformations: Phase-Field Simulations and Experiments

Materials ◽  
2021 ◽  
Vol 14 (6) ◽  
pp. 1373
Author(s):  
Yueh-Yu Lin ◽  
Felix Schleifer ◽  
Markus Holzinger ◽  
Na Ta ◽  
Birgit Skrotzki ◽  
...  
Keyword(s):  
Aspect Ratio ◽  
Phase Field ◽  
Phase Field Model ◽  
Invariant Moments ◽  
Plane Normal ◽  
Plane Shape ◽  
Formation And Evolution ◽  
The Given ◽  
Good Agreement

The effectiveness of the mechanism of precipitation strengthening in metallic alloys depends on the shapes of the precipitates. Two different material systems are considered: tetragonal γ′′ precipitates in Ni-based alloys and tetragonal θ′ precipitates in Al-Cu-alloys. The shape formation and evolution of the tetragonally misfitting precipitates was investigated by means of experiments and phase-field simulations. We employed the method of invariant moments for the consistent shape quantification of precipitates obtained from the simulation as well as those obtained from the experiment. Two well-defined shape-quantities are proposed: (i) a generalized measure for the particles aspect ratio and (ii) the normalized λ2, as a measure for shape deviations from an ideal ellipse of the given aspect ratio. Considering the size dependence of the aspect ratio of γ′′ precipitates, we find good agreement between the simulation results and the experiment. Further, the precipitates’ in-plane shape is defined as the central 2D cut through the 3D particle in a plane normal to the tetragonal c-axes of the precipitate. The experimentally observed in-plane shapes of γ′′-precipitates can be quantitatively reproduced by the phase-field model.

FIXED ELEMENTS OF NONINJECTIVE ENDOMORPHISMS OF POLYNOMIAL ALGEBRAS IN TWO VARIABLES

2016 ◽  
Vol 95 (2) ◽  
pp. 209-213
Author(s):  
YUEYUE LI ◽  
JIE-TAI YU
Keyword(s):  
Associative Algebra ◽  
Characteristic Zero ◽  
Polynomial Algebra ◽  
Free Associative Algebra ◽  
Polynomial Algebras ◽  
Fixed Element ◽  
The Given

Let $A_{2}$ be a free associative algebra or polynomial algebra of rank two over a field of characteristic zero. The main results of this paper are the classification of noninjective endomorphisms of $A_{2}$ and an algorithm to determine whether a given noninjective endomorphism of $A_{2}$ has a nontrivial fixed element for a polynomial algebra. The algorithm for a free associative algebra of rank two is valid whenever an element is given and the subalgebra generated by this element contains the image of the given noninjective endomorphism.

scholarly journals Bioadhesive Curcumin-Mediated Photodynamic Inactivation and Its Potential to Cause Undesirable Effects on Dental and Restorative Surfaces

Pharmaceutics ◽  
2021 ◽  
Vol 13 (9) ◽  
pp. 1458
Author(s):  
Bárbara Donadon Reina ◽  
Carolina Santezi Neto ◽  
Patrícia Petromilli Nordi Sasso Garcia ◽  
Marlus Chorilli ◽  
Giovana Maria Fioramonti Calixto ◽  
...  
Keyword(s):  
Surface Roughness ◽  
Liquid Crystal ◽  
Tooth Enamel ◽  
Dental Enamel ◽  
Color Stability ◽  
Composite Resins ◽  
Photodynamic Inactivation ◽  
Restorative Material ◽  
Negative Effects ◽  
Restorative Materials

Curcumin-mediated Photodynamic Inactivation (PDI) has shown great potential to disinfect specific sites on tooth enamel but may involve contact with restorative materials. Thus, before use in dentistry, it is necessary to investigate whether the PDI protocol causes undesirable changes in the surfaces of aesthetic restorative materials and dental enamel. This study investigated the effect of PDI mediated by curcumin (CUR) in a liquid crystal precursor system on color stability (ΔE), surface roughness (Ra), and microhardness (kgf) of three different composite resins and bovine dental enamel specimens. The microhardness and roughness readings were performed 60 days after the treatments while the color readings were performed immediately, 24, 48, and 72 h, 7, 14, 21, 30, and 60 days after the treatments. Results showed that CUR mediated-PDI does not seem to have the potential to promote any esthetic or mechanical changes to the surface of tooth enamel and can be applied safely in clinical practice. However, the results on color, roughness, and hardness obtained for composite resins show that some negative effects can be produced, depending on the type of restorative material; more experiments must be performed with different formulations and, perhaps, with lower concentrations of CUR.

scholarly journals ANALYSIS OF PATIENTS’ EXAMINATION WITH UNSATISFACTORY ORTHOPEDIC TREATMENT RESULTS OF HARD TISSUES OF TEETH AND DENTAL ROWS OF NON-REMOVABLE DENTURES

2018 ◽  
pp. 38-43
Author(s):  
I.N. Yarina
Keyword(s):  
Dental Materials ◽  
Physiological Adaptation ◽  
Orthopedic Treatment ◽  
Dental Patients ◽  
Results Of Treatment ◽  
Prophylactic Measures ◽  
Short Period ◽  
Hard Tissues ◽  
Intermediate Part

Nowadays, the problem of prosthetic with non-removable orthopedic structures is quite common and is widely described in domestic and foreign literature. Prosthetics of non-removable structures of prosthetics has a number of advantages: complete rehabilitation of biting function, chewing efficiency, aesthetic norm of a smile. Invisible prosthesis designs, usually small in size, have a short period of psychological and physiological adaptation, which has a good reflection on their long-term use by the patient. The examination of dental patients in the clinic of orthopedic dentistry with unsatisfactory results of prosthetic dentures after 5 years with orthopedic treatment allowed to highlight the main indicators of inapplicability regarding the further use of dentures in terms of biocompatibility, mechanical strength and aesthetic properties. The main aim of the study was to improve the quality of patients’ treatment by identifying the causes of treatment complications by an orthopedist using the method of comparative analysis during the examination of patients with unsatisfactory results of dentures using permanent dentures. To identify the causes of complications of orthopedic treatment, a clinical examination of patients with unsatisfactory results of treatment with permanent constructions of dentures on a cast base was performed. The criteria for evaluation were the following indicators: bad breath, gums pain and bleeding, pain and mobility of the supporting teeth, pain under the intermediate part, metallic taste, pain in the blood vessel, darkening of the lining, chipping the lining, obscuring gums, excessive abrasion, and cleavage. From anamnesis and records in the history of the disease, the period of difficulty was determined. Our research results indicate that a significant part of ineffective treatment is due to the wrong choice of auxiliary and structural materials. Given that the choice of materials is performed arbitrarily, in almost half of cases, taking into account the wishes of patients and their financial capabilities, including the physical, mechanical and clinical and technological characteristics of dental materials, in our opinion, it is necessary to create a computer model of rational choice of material, therapeutic and prophylactic measures to improve the effectiveness of orthopedic treatment for patients with defects in hard tissues of teeth and dentition with non-removable structures. The complex of the following studies will allow the orthopedic dentist to continue improving the quality of patients’ treatment at the clinical stages of treatment with non-removable dentures.

scholarly journals Ultrasonography in diagnosis of sexual development delay of girls and teenagers having diabetes mellitus of the 1st type

2002 ◽  
Vol 1 (4) ◽  
pp. 87-92
Author(s):  
N. M. Kondratyeva ◽  
V. D. Zavadovskaya ◽  
E. B. Kravets ◽  
E. V. Gorbatenko ◽  
L. S. Strelis
Keyword(s):  
Diabetes Mellitus ◽  
Blood Flow ◽  
Sexual Development ◽  
The Body ◽  
Ultrasound Studies ◽  
Ultrasound Study ◽  
Development Delay ◽  
The Given ◽  
Ultrasound Classification

Girls-teenagers (n = 85) aged from 8 to 18 years having diabetes mellitus (DM) of the 1st type were investigated using ultrasonography method. Based upon decreasing and disproportion of the body and neck of the uterus, changed Mecho thickness and ovaries structure, different parameter of blood flow, we worked out classification of the four stages of sexual development delay (SDD) (0 stage in 15 girls, I stage in 26 girls, II stage in 20 girls and III stage in 21 girls). Comparative analysis of clinical and ultrasound studies showed the advantage of ultrasound study to assess status of internal genital organs in girls and teenagers having DM. Investigation performed based upon E. Tanner classification revealed SDD 40 girls, bimanual examination in 45 girls, sonography method — in 82 girls. The given ultrasound classification of sexual development delay in girls-teenagers having DM of the 1st type contributes to diagnosis and prescribing timely effective correction therapy.

scholarly journals Классификация географической терминологии (на материале сказки Р. Киплинга «Кот, который гулял где хотел» на русском и английском языках)

2021 ◽  
Vol 70 (7) ◽  
pp. 42-45
Author(s):  
Ю.П. Зайченко ◽  
С.Н. Семенова ◽  
О.В Бабак
Keyword(s):  
Fairy Tale ◽  
The Given

The article is devoted to the classification of geographical terminology in R. Kipling’s fairy-tale “The Cat That Walked by Himself” in Russian and English. The relevance of the given study is due to the productivity of vocabulary from many sciences in fiction in the framework of various linguistic studies. The authors of the article constructed tables and a diagram. The data obtained in the course of the study were systematized in Russian and English. The frequency of words and concepts was revealed and comments were given.

scholarly journals Application of Latent Dirichlet Allocation (LDA) for clustering financial tweets

2021 ◽  
Vol 297 ◽  
pp. 01071
Author(s):  
Sifi Fatima-Zahrae ◽  
Sabbar Wafae ◽  
El Mzabi Amal
Keyword(s):  
Language Processing ◽  
Latent Dirichlet Allocation ◽  
Sentiment Classification ◽  
Research Areas ◽  
Preprocessing Method ◽  
Long Time ◽  
Standard Text ◽  
The Given ◽  
Dirichlet Allocation

Sentiment classification is one of the hottest research areas among the Natural Language Processing (NLP) topics. While it aims to detect sentiment polarity and classification of the given opinion, requires a large number of aspect extractions. However, extracting aspect takes human effort and long time. To reduce this, Latent Dirichlet Allocation (LDA) method have come out recently to deal with this issue.In this paper, an efficient preprocessing method for sentiment classification is presented and will be used for analyzing user’s comments on Twitter social network. For this purpose, different text preprocessing techniques have been used on the dataset to achieve an acceptable standard text. Latent Dirichlet Allocation has been applied on the obtained data after this fast and accurate preprocessing phase. The implementation of different sentiment analysis methods and the results of these implementations have been compared and evaluated. The experimental results show that the combined uses of the preprocessing method of this paper and Latent Dirichlet Allocation have an acceptable results compared to other basic methods.

Classification of phraseological synonyms in English and Azerbaijani

2020 ◽  
Vol 60 (11) ◽  
pp. 134-137
Author(s):  
Dilara Rashid Khanbabayeva ◽  
Keyword(s):  
Great Britain ◽  
Soviet Union ◽  
Former Soviet Union ◽  
European Association ◽  
European Countries ◽  
Eastern European ◽  
East German ◽  
Eastern European Countries ◽  
The Given

The presented article deals with the classification of English synonyms. The notion of phraseology is wide.Here concepts of some distinguished scientists are presented in the given article. Phraseology (from Greek φράσις phrasis, "way of speaking" and -λογία -logia, "study of") is a scholarly approach to language which developed in the twentieth century. It took its start when Charles Bally's notion of locutions phraseologiques entered Russian lexicology and lexicography in the 1930s and 1940s and was subsequently developed in the former Soviet Union and other Eastern European countries. From the late 1960s on it established itself in (East) German linguistics but was also sporadically approached in English linguistics. The earliest English adaptations of phraseology are by Weinreich (1969) within the approach of transformational grammar, Arnold (1973), and Lipka. In Great Britain as well as other Western European countries, phraseology has steadily been developed over the last twenty years. The activities of the European Society of Phraseology (EUROPHRAS) and the European Association for Lexicography (EURALEX) with their regular conventions and publications attest to the prolific European interest in phraseology. European scholarship in phraseology is more active than in North America. Bibliographies of recent studies on English and general phraseology are included in Welte (1990) and specially collected in Cowie & Howarth (1996) whose bibliography is reproduced and continued on the internet and provides a rich source of the most recent publications in the field. Key words: phraseology,synonym,language,linguistics,scientist

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