bluuebunny/crossref_metadata_2025_split huggingface dataset:
Cost minimization and financial impact of root canal therapy techniques: manual, rotary and reciprocating
Authors: Pinheiro Polyana Santiago Marques , Garcia Sylvanne Lucila da Silva , Machado Victor Coutinho Mello , Simoes Ana Clara Correa Duarte , Merchan Laura Paredes , Raimundo Augusto Cesar Santos , Cavalcante Denise de Fátima Barros , Pereira Antonio Carlos 
Published: November 2020

The root canal therapy consists of phases aimed at cleaning and disinfection of the root canal system. The chemomechanical preparation is the one that makes use of instruments that can be used by means of mechanized techniques (rotary and reciprocation) and manual. The present study seeks to compare the three instrumentation techniques, based on cost and outcome, using the cost – minimization analysis in the perspective of the Social Service of Commerce (SESC - Brazil), and a time horizon of 10 years. The effectiveness of the techniques were raised through literature review and selection of systematic review studies. The costs were measured by the microcosting technique, in addition to the information from the SESC databases. In the analyzed period, the study shows that the use of the rotary system can increase the capacity of care by 44,67%, while the reciprocation system by 168 %. The financial impact would be R$ 103,683.87 and R$ 735,179.46 for the rotary and reciprocation, respectively. Using as reference the conventional technique, R$ 44.58 more is spent for the treatment with rotary instruments and R$ 84,03 for the reciprocation. Even with the highest allocating efficiency for the reciprocating technique with much greater coverage, the budget impact needs to be analyzed with caution. The incorporation of reciprocating technology demonstrating to be the technique with the highest allocating efficiency, best minimization cost ratio and reasonable cost of additional treatment in relation to other techniques.
Arte-educação e libertação humana
Authors: Farias Carla Galvão , Oliveira Milene kinlliane Silva de , Dias Polyana Nogueira 
Published: November 2020

Este artigo traz algumas reflexões sobre os conceitos de arte-educação e libertação humana, considerando, para tal, o ensino de Artes na Educação Básica, de acordo com a Lei de Diretrizes e Bases nº 9.394/96, da lei 13.278/16 e os desafios que permeiam esse ensino-aprendizagem. Trata-se de uma pesquisa de cunho Bibliográfica, que consiste em relacionar os pensamentos de dois autores: as concepções de arte-educação em Duarte Jr. (2010, 2012) e os conceitos de práticas “bancárias” na educação, de “ser mais”, de libertação humana e de autonomia em Paulo Freire (1996, 2011). Visando encontrar aproximações nos estudos dos referidos autores sobre as práticas de ensino e os modos de se estimular a autonomia dos educandos. Conclui-se que a arte-educação vai ao encontro da autonomia, por respeitar a subjetividade e promover práticas de ensino-aprendizagem que compreendem o ser humano de forma integral, ou seja, o corpo também é considerado importante no processo de aprendizado, não apenas a mente. Por isso, as emoções e experiências de vida são acolhidas.
ERGONOMIC EVALUATION OF STUDY DESKS AND CHAIRS USING ANTHROPOMETRY AND BIOMECHANICAL APPROACH AT AN-NURIYAH ISLAMIC BOARDING SCHOOL BONTOCINI JENEPONTO REGENCY
Authors: Afiah Irma Nur 
Published: November 2020

School is one of the places to study. Therefore, it requires facilities to support the sustainability of the process of teaching and learning to teach such as study desks and study chairs. However, when the activity of writing is performed using study desks and chairs, students tend to lean to the front, slouch and dangle their feet. Evaluation of the products ergonomically has to be adjusted with the usage in order that they are not going to cause various negative impacts for students that will take place in both the short term and the long one. As a consequence, this study is important to carry out to minimize the mismatch of study desks and chairs with students and to obtain the redesigned results of study desks and study chairs ergonomically. The anthropometric approach was used for the dimensions of the human body in the design of study desks and chairs. In addition, the biomechanical approach was utilized to evaluate good sitting position for students. The evaluation was observed from the calculation of compression pressure, which is the load that occurs in the neck and lumbar. The results of the design of the proposed study desks and chairs are more ergonomic and can accommodate anthropometric users; hence, parts of the study desks and chair can minimize the complaints perceived by students. Through the biomechanical approach, the results obtained the angle surface of the table of 200, the slope of the seat rest of 100º and the seat slope of 50º
Broadband integrated optical modulators: achievements and prospects
Authors: Petrov V M , Agruzov P M , Lebedev V V , Il’ichev I V , Shamray A V 
Published: November 2020

Abstract
Broadband integrated optical modulators are key elements of modern optical information systems. The three main technological material platforms for their manufacture are considered: lithium niobate, III–V semiconductors, and silicon. Progress achieved in the development of integrated optical modulators is analyzed, and the main parameters of modulators obtained for various materials are compared with requirements for practical applications. Directions in the further development of the technology of modulators related to new problems in optical information systems are discussed.
Compressible vortex structures and their role in the onset of hydrodynamic turbulence
Authors: Agafontsev D S , Kuznetsov E A , Mailybaev A A , Sereshchenko E V 
Published: November 2020

Abstract
We study the formation of quasi-two-dimensional (thin pancake) vortex structures in three-dimensional flows and of quasi-one-dimensional structures in two-dimensional hydrodynamics. These structures are formed at large Reynolds numbers, when their evolution is described in the leading order by the Euler equations for an ideal incompressible fluid. We show numerically and analytically that the compression of these structures and, as a consequence, the increase in their amplitudes are due to the compressibility of the frozen-in-fluid fields: the field of continuously distributed vortex lines in the three-dimensional case and the field of vorticity rotor lines (divorticity) for two-dimensional flows. We find that the growth of vorticity and divorticity can be considered to be a process of overturning the corresponding fields. At high intensities, this process demonstrates a Kolmogorov-type scaling relating the maximum amplitude to the corresponding thicknesses-to-width ratio of the structures. The possible role of these coherent structures in the formation of the Kolmogorov turbulent spectrum, as well as in the Kraichnan spectrum corresponding to a constant flux of enstrophy in the case of two-dimensional turbulence, is analyzed.
Application of the modified Duguay method for measuring the Lorentz contraction of a moving body length
Authors: Malykin G B 
Published: November 2020

Abstract
According to Lorentz transformations, for a stationary observer, time in a moving inertial reference frame slows down, while the linear dimensions are reduced. While the first effect was observed more than 80 years ago, the second one has not been directly observed so far. The modified Duguay method is proposed in this paper for measuring the Lorentz contraction of a moving body length using the propagation of light pulses in an optical liquid medium. Three variants of the measurement scheme are considered: with a ‘light square’ in an optical medium, with a ‘light ruler’ in two optical media with different refractive indices, and with two relativistic electron bunches in a vacuum. It is shown that the classical effect of compression of spatial intervals between light pulses in an optical medium, which was not considered earlier, considerably reduces the measurement accuracy. It is also shown that the distortion of the sides of a light square oriented orthogonal to the movement direction caused by the different delays of light from different parts of a moving body also reduces the measurement accuracy of the light square method.
Gas envelopes of exoplanets — hot Jupiters
Authors: Bisikalo D V , Shematovich V I , Kaygorodov P V , Zhilkin A G 
Published: November 2020

Abstract
We consider the physical characteristics and dynamics of the gaseous envelopes of hot Jupiters (HJs) — gas giants with a mass comparable to Jupiter’s and a semi-major axis of less than 0.1 a.u. Although HJs were discovered almost a quarter of a century ago, many issues about their origin remain open. There are two reasons for the scientific interest in HJs. The first is the absence of such planets in the Solar System, which is challenging in all cosmogonical theories. The second is that the exoplanet atmospheres’ characteristics can now be derived primarily for transit HJs by examining their absorption spectra. Thanks to their large size, such planets can be readily observed, as opposed to others, and their transits can be observed at much higher orbital inclinations. Comparatively recently, in at least some HJs, extended gas envelopes far exceeding their Roche lobes have been found. The paper focuses on the results of theoretical investigations and numerical modeling of the dynamics of HJ envelopes. We also discuss experimental testing of the obtained results and predictions using the planned Russian Spectrum-UV (international name: WSO-UV) and Millimetron space telescopes.
Security of the decoy state method for quantum key distribution
Authors: Trushechkin A S , Kiktenko E O , Kronberg D A , Fedorov A K 
Published: November 2020

Abstract
Quantum cryptography or, more precisely, quantum key distribution (QKD), is one of the advanced areas in the field of quantum technologies. The confidentiality of keys distributed with the use of QKD protocols is guaranteed by the fundamental laws of quantum mechanics. This paper is devoted to the decoy state method, a countermeasure against vulnerabilities caused by the use of coherent states of light for QKD protocols whose security is proved under the assumption of single-photon states. We give a formal security proof of the decoy state method against all possible attacks. We compare two widely known attacks on multiphoton pulses: photon-number splitting and beam splitting. Finally, we discuss the equivalence of polarization and phase coding.
Thavayogam and sivayogam in Thirumanthiram
Authors: R Mathan kumar 
Published: November 2020

In today’s mechanical world, there is no use of learning some of the exercises only in the name of yoga. According to Tirumoolar, yoga is the purification of the body, mind, action and wound. The yoga practice that encompasses this concept is offered as Attanga Yoga in Thirumanthiram. The human soul has bounded knowledge where the Thiruvarul is performing as instrument to practice Attanga Yoga. According to Thirumoolar, Attaining Attamasithi through Attanga Yoga is not the completion of practicing yoga; Attaining seevanmuthan stage is the final stage where yogis can feel fulfillment through Ataanga Yoga. The soul gets the superior birth as human being through it’s benevolence of previous birth. By the grace of god, soul attains Iruvinaioppu, Malaparipakam and Thiruvarulvizhchi. In that improved stage, Thiruvarul exists as Gnanaguru and leads the soul to Attanga Yoga and the Thava Yoga. This practice also called as Raja-yogam. Through the practice of Attanga Yoga, soul attains the Attama sithis and realizes that the Thiruvarul is the part of Sivam. As Thiruvarul incorporates in sivam, the soul will realize it’s incorporation in sivam with limitless knowledge. This consciousness helps the soul to have strong bonding with siva. The attitude expresses the blissful movement of the soul. This experience stated as Siva-Gnana-yogam. Thus this article explains the virtues of attaining the bliss of living, Sivanupavam, through the path of Thirumanthiram.
Noninvasive epi-endocardial electrocardiographic imaging of ventricular septal pacing
Authors: Chmelevsky M. P. , Potyagaylo D. A. , Zubarev S. V. , Budanova M. A. , Lebedev D. S. 
Published: November 2020

Noninvasive epi-endocardial ElectroCardioGraphic Imaging (ECGI) allows reconstruction of electrograms and high-resolution visualization of various isoparametric maps based on multichannel ECG recordings and tomography. We aimed to verify the ECGI accuracy during septal ventricular pacing in patients with pre-implanted pacemakers using the new ECGI algorithm.Methods. Ten patients underwent epi-endocardial ECGI mapping (Amycard 01C EP Lab, Amycard LLC, Russia - EP Solutions SA, Switzerland). The iterative Equal Single Layer algorithm (ESL-iterative) and a new Fast Route algorithm in combination with the vector approach (FRA-V) were used to reconstruct isopotential and correlation similarity maps. Geodesic distance between noninvasively reconstructed early activation zone and RV reference pacing sites were measured to evaluate the ECGI accuracy.Results. The mean (SD) geodesic distance between noninvasively identified sites and reference pacing sites was 22 (15) mm for the ESL-iterative and 12 (7) for FRA-V algorithms, median (25-75% IQR) - 23 (8-29) mm and 10 (8-14) mm, respectively. The accuracy of ECGI mapping based on the FRA-V algorithm was significantly better than ESL-iterative algorithm (p=0,01). A detailed visual analysis of correlation similarity and isopotential maps showed significantly more accurate localization of early activation zones using the new FRA-V algorithm.Conclusions. Our study showed the feasibility and accuracy of a novel epi-endocardial ECGI mapping approach to identify early activation zones during septal ventricular pacing using the new FRA-V algorithm. The FRA-V algorithm is significantly better for epi-endocardial ECGI mapping and shows a significant advantage of this technique compared to other non-invasive methods of topical diagnostics. Moreover, simultaneous beat-to-beat mapping of entire ventricular septum allows using this technique for pre-ablation evaluation of unstable and polymorphic ventricular arrhythmia exit sites.
New approaches for predicting outcomes in patients with atrial fibrillation
Authors: Novikova N. A. , Gilyarov M. Yu. , Suvorov A. Yu. , Kuchina A. Yu. 
Published: November 2020

Aim:we aimed to assess the capabilities of “machine learning” methods in predicting remote outcomes in patients with non-valvular atrial fi brillation (AF).Methods.From 2015 to 2016 234 patients with non-valvular AF were included in the study (median age 72 (65; 79) years; 50.0% men). During the median follow-up of 2.9 (2.7; 3.2) years 42 patients died, 9 patients had non-fatal acute cerebral circulatory disorders and 3 patients had non-fatal myocardial infarction (MI). These events in 52 subjects (22.2% from all patients included) were combined into a combined endpoint (death and a nonfatal cardiovascular accident at the stage of remote observation). The first 184 patients comprised a “training” group. The next 50 patients formed the “test” group. The following methods of «machine learning» were used in the analysis: classifi cation trees, linear discriminant analysis, the k-nearest neighbor method, support vectors method, neural network.Results.Long-term outcomes were influenced by age, known traditional risk factors for cardiovascular diseases, the presence of these diseases, changes in intracardiac hemodynamics and heart chambers as evaluated by echocardiography, the presence of concomitant anemia, advanced stages of chronic kidney disease, and the administration of drugs associated with a more severe cardiovascular disease progression (amiodarone, digoxin). The best prognosis was created using the model of linear discriminant analysis, the complex neural network model, and the support vector machine.Conclusion.Modern methods aimed at prognosis estimation seem to be of importance in cardiology. These methods include big data analysis and machine learning technologies. The methods require further evaluation and confirmation, and in the future they may allow correcting cardiovascular risks, using data from real clinical practice and evidence-based medicine at the same time.
Association of hemolysis with the incidence of heart rhythm disturbances following coronary artery bypass graft surgery
Authors: Maksimovich Ye. N. , Pronko T. P. , Yanushko V. A. , Kashcheyeu Yu. A. , Snezhitski V. A. 
Published: November 2020

Introduction:Coronary artery bypass grafting (CABG) might be associated with the development of heart rhythm disturbances. We aimed at evaluating an association of intraoperative hemolysis (IOH) with the development of cardiac rhythm disturbances in patients with coronary artery disease after on-pump CABG.Methods.The assessment of the degree of IOH was performed according to the level of plasma free hemoglobin [Hb] at baseline, immediately after the patient was connected to the cardiopulmonary bypass (CPB) device and 15 minutes before cessation of CPB. We included 123 patients, and they were divided into 3 groups (gr.) according to free [Hb] level: gr.1 - ≤0.1 g/l; gr.2 - > 0.1 g/l and <0,5 g/l; gr.3 - ≥0.5 g/l. A variety of ECG screening methods were applied for the detection of cardiac arrhythmia in the postoperative period. The follow-up period was 1 months.Results.Arrhythmias were observed in 2.3% of patients in the 1st group, in 11.9% in the 2nd group, and in 52.6% in the 3rd group. The level of plasma free [Hb] in samples taken at the end of CPB was strongly associated with the arrhythmia detection (rs=0,70, p <0.001). Life-threatening and hemodynamically unstable arrhythmias were more frequently detected in the group with a higher degree of IOH (p <0.001), and accounted for about half of all arrhythmias.Conclusions.On-pump CABG is associated with the development of cardiac arrhythmias in the postoperative period in 22% of patients. A significant proportion of these arrhythmias are potentially life-threatening. The highest proportion of patients with cardiac rhythm disturbances after CABG was observed when the level of plasma free hemoglobin was >0.5 g.
The Impact of Corporate Governance on Profitability of Conventional Banks Operating in Pakistan
Authors: Naveed Hafiz Muhammad , Ali Shoaib , Hongxing Yao , Altaf Saqib , Muhammad Sohu Jan 
Published: November 2020

The key purpose of present research study to examine the association among corporate governance and profitability banks in developing counties. For such primary objective, annually based data collected from 2004 to 2016. The data taken from annual financial reports which issued by conventional banks. We have used ADF (Augmented Dickey Fuller) test to examine the unit-root of variables. Moreover, the multiple linear regression utilized for hypothetical estimation. The results indicates that corporate governance and conventional banks profitability of Pakistan are bidirectional (positive-negative) associated to each other. In addition, the board size (Board Directors) is negatively associated with Return on assets and return on equity of banks. Similarly, the board independence (Insider-Outsider Board Directors) is positively influenced to return on assets and return on equity of conventional banks of Pakistan. The overall findings shows that board size and board independence are highly associated with return on equity than return on assets. Moreover, banking sector in developing countries the board size should contain on appropriate strength and acquire more professional and qualified staff. An optimal number of directors in a board size there is a need of commercial banks as to increase the profitability. To enhance the investors’ confidence with the bank there is also a need of the commercial banks to increases the board independency.
EFEKTIVITAS MODEL PROBLEM BASED LEARNING TERHADAP KETERAMPILAN PROSES SAINS SISWA SMA KELAS XI PADA MATERI KESETIMBANGAN KIMIA
Authors: Susi Susi , Yenti Elvi 
Published: November 2020

This research was instigated by Chemistry subject at Senior High School of YLPI Pekanbaru that was dominated by discussion, question, and answer methods. These methods did not train student ability in the inquiry, it was proven by the low score of student science process skill on Chemical Equilibrium lesson. This research aimed at knowing the effectiveness of Problem Based Learning model toward student science process skill on Chemical Equilibrium lesson. Quasi-experimental method was used in this research with pretest posttest control group design. The samples were the eleventh-grade students of Natural Science 1 as the experimental group and the students of Natural Science 2 as the control group, and each class had 20 students. Test and observation sheet were the instruments of this research. The data of science process skill test were analyzed by using statistical test and to test the hypothesis was using t-test. The calculation result data of the mean difference of both classes showed that the score of tobserved was 8.66 and ttable was 1.69 at 0.05 significant level, so tobserved was higher than ttable. It showed that Alternative hypothesis was accepted, it meant that Problem Based Learning model was effective to be used toward student science process skill on Chemical Equilibrium lesson, and the effectiveness percentage score was 75%.
НА ДОПОМОГУ ПРАКТИКАМ — VІ МІЖНАРОДНИЙ КОНГРЕС ЗІ СПЕЦІАЛЬНОЇ ПЕДАГОГІКИ ТА ПСИХОЛОГІЇ «ОСОБЛИВІ ДІТИ»: ОСВІТА І СОЦІАЛІЗАЦІЯ»
Authors: ПРОХОРЕНКО Леся Іванівна , ЯРМОЛА Наталія Іванівна 
Published: November 2020

Стисло окреслено основні напрями в освіті осіб з особливими потребами, щоб привернути увагу освітян і науковців до тих проблем, які виникають і потребують вирішення, перспектив, які вбачаються у майбутньому. Наголошено, що серед основних напрямів залучення осіб з особливими потребами до загальноосвітнього простору України є організація інклюзивного навчання. У загальному баченні, інклюзивна парадигма передбачає надання підтримки особам з особливими потребами, яка може впроваджуватися у різних формах підтримки: технічна (забезпечення відповідного обладнання, завдяки чому людина з обмеженими можливостями здатна жити більш незалежним життям), психолого-педагогічна (освітні послуги, психологічна допомога, підтримка, та ін.), соціальна (соціальна адаптація осіб з особливими потребами у тому оточенні, в якому вони перебувають та ін.), науково-методична (розроблення наукового, навчально-методичного забезпечення освіти осіб з особливими потребами на основі законодавчих нормативно-правових актів) тощо.
Окреслено основні проблеми, які виникли в умовах онлайн-навчання. У професійній спільноті приділяється увага питанням дистанційної освіти дітей з особливими освітніми потребами, зокрема, питанню організації онлайн-навчання дітей з особливими потребами.
На розв’язання цих питань й були спрямовані практичні заходи Інституту спеціальної педагогіки і психології імені Миколи Ярмаченка НАПН України для педагогів, психологів, батьків. Зокрема, окреслено ключові рекомендації та перелік ресурсів щодо організації онлайн-навчання дітей з особливими потребами різних нозологій.