bluuebunny/crossref_metadata_2025 huggingface dataset:
On the optimal renewal of bilinear functionals from linear information
Authors: Babenko V.F. , Gun'ko M.S. , Rudenko A.A.
Published: October 2020

We found the optimal linear information and the optimal method of its use to renewal the bilinear functionals on sets which are defined by unbounded operators.
Inequalities for norms of derivatives of non-periodic functions with non-symmetric constraints on higher derivatives
Authors: Kofanov V.A.
Published: October 2020

For non-periodic functions $x \in L^r_{\infty}(\mathbb{R})$ defined on the whole real line we established the analogs of certain inequality of V.F. Babenko.
Mean approximation of functions by algebraic polynomials
Authors: Motornyi V.P. , Klimenko M.S.
Published: October 2020

Estimates for approximation of functions with given majorant of modulus of continuity by polynomials in integral metrics were estalished.
Conditions of unicity of the best non-symmetric $L_1$-approximant for continuous vector-valued functions by one-dimensional subspace
Authors: Tkachenko M.Ye. , Traktyns'ka V.M.
Published: October 2020

The necessary and sufficient conditions of the unicity of the best $(\overline{\alpha};\overline{\beta})$-approximant for the continuous vector-valued functions on the metric compact by one-dimensional subspace are obtained.
Approximation by algebraic polynomials in metric spaces $L_{\psi}$
Authors: Agoshkova T.A.
Published: October 2020

In the space $L_{\psi}[-1;1]$ of non-periodic functions with metric $\rho(f,0)_{\psi} = \int\limits_{-1}^1 \psi(|f(x)|)dx$, where $\psi$ is a function of the type of modulus of continuity, we study Jackson inequality for modulus of continuity of $k$-th order in the case of approximation by algebraic polynomials. It is proved that the direct Jackson theorem is true if and only if the lower dilation index of the function $\psi$ is not equal to zero.
On the optimal renewal of n-linear functionals from linear information
Authors: Babenko V.F. , Gun'ko M.S. , Rudenko A.A.
Published: October 2020

We found the optimal linear information and the optimal method of its use to renewal the n-linear functionals on sets which are defined by unbounded operators.
Inequalities of Hardy-Littlewood-Polya type for operators in Hilbert space
Authors: Babenko V.F. , Kryachko N.A.
Published: October 2020

We obtained sharp "multiplicative" and sharp "additive" inequalities of Hardy-Littlewood-Polya type for operators in Hilbert space.
On inequalities of Kolmogorov type for the functions being analytic in the unit bicircle
Authors: Vakarchuk S.B. , Vakarchuk M.B.
Published: October 2020

The sharp inequality of Kolmogorov type has been obtained in the space $\mathfrak{B}(U_2)$ for functions of two complex variables analytic in the unit bicircle.
Exact values of mutual deviation of certain interpolation subspaces of Hermitian splines in uniform and integral metric
Authors: Bіkkuzhyna T.R. , Velikіn V.L.
Published: October 2020

We obtained exact values of mutual deviation of interpolation subspaces of Hermitian splines of arbitraty orders on the classes of continuous and continuously differentiable functions in $L_p$ spaces, $1 \leqslant p \leqslant \infty$.
On the inclusion of classes of functions, being integrable with a weight on the interval and satisfying conditions of Lipschitz type
Authors: Goncharov S.V.
Published: October 2020

We obtain generalization of Hardy and Littlewood inclusion theorem for some classes of functions being integrable with a weight on $[-1;1]$.
On certain groups with Chernikov group of automorphisms
Authors: Pypka O.O.
Published: October 2020

We obtained automorphic analogue of Schur’s theorem for the case when an arbitrary subgroup A of automorphism group Aut(G) of a group G and the factor-group of a group G modulo A-center are Chernikov groups.
On the best polynomial approximation of $2\pi$-periodic functions in the $L_2$ space
Authors: Vakarchuk S.B.
Published: October 2020

On the classes $L^r_2$, where $r\in {\mathbb{Z}}_+$, exact constants of Jackson type inequalities have been obtained for the characteristics of smoothness ${\Delta}_k (f)$, $k\in \mathbb{N}$, which are defined by the averaged $k$-th order finite differences of functions $f\in L_2$.
Inequalities of Kolmogorov type for norms of hypersingular integrals with homogeneous characteristic of constant sign
Authors: Parfinovich N.V.
Published: October 2020

We obtained new sharp Kolmogorov-type inequalities for norms of hypersingular integrals with homogeneous characteristic of constant sign ${\| D^{\alpha}_{\Omega} \|}_{\infty}$. We provided some applications of the obtained inequalities.
The best polynomial approximation, derivatives of fractional order, and widths of classes of functions in $L_2$
Authors: Vakarchuk S.B. , Vakarchuk M.B.
Published: October 2020

On the classes of $2\pi$-periodic functions ${\mathcal{W}}^{\alpha} (K_{\beta}, \Phi)$, where $\alpha, \beta \in (0;\infty)$, defined by $K$-functionals $K_{\beta}$, fractional derivatives of order $\alpha$, and majorants $\Phi$, the exact values of different $n$-widths have been computed in the space $L_2$.
Solution of Bojanov-Naidenov problem with constraints for the norm $\|x\|_{p,\delta} = \sup \bigl\{ \| x \|_{L_p[a;b]} \colon a,b\in \mathbb{R}, b-a\leqslant \delta \bigr\}$
Authors: Kofanov V.A.
Published: October 2020

For given $r\in \mathbb{N}$; $p,\lambda > 0$ and fixed interval $[a;b] \subset \mathbb{R}$ we solve the extremal problems 1) $\int\limits_a^b |x(t)|^q dt \rightarrow \sup$, $q > p$, 2) $\int\limits_a^b |x^{(k)}(t)|^q dt \rightarrow \sup$, $q \geqslant 1$, $k\in \mathbb{N}$, $k < r$, on the set of functions $f\in L^r_{\infty}$ such that $\|x^{(r)}\|_{\infty} \leqslant 1$, $\|x\|_{p,\delta} \leqslant \| \varphi_{\lambda,r} \|_{p,\delta}$, $\delta \in (0,\pi / \lambda)$.
Improvement of smoothness of functions by bilinear operators, continuous by measure
Authors: Pas'ko A.M.
Published: October 2020

The sequences of the translation invariant by the both arguments, continuous bilinear operators $T_n\colon L_1 \times L_1 \rightarrow L_0$ has been considered. The improvement of the smoothness of the functions belonging to the Lipschitz-Holder classes has been established.
Criterions for the best non-symmetric $L_p$- and $L_1$-approximant for the functions with values in KB-spaces with weight
Authors: Tkachenko M.Ye. , Traktyns'ka V.M.
Published: October 2020

The questions of the characterization of the best non-symmetric $L_p$ and $L_1$-approximant for the functions with values in KB-space with a weight were considered. The criterions of the best non-symmetric approximant for the specified functions in metrics of the spaces $L_p$ and $L_1$ with a weight is obtained.
A felnőttkori krónikus köhögés ellátása a mindennapi gyakorlatban
Authors: Szalai Zsuzsanna
Published: October 2020

Absztrakt:

A köhögés miatt orvoshoz forduló betegek száma jelentős. A krónikus köhögés –
amely definíció szerint 8 hétnél hosszabb ideig tart, és amelynek hátterében nem
igazolható sem kóros radiológiai elváltozás, sem külső inhalatív ártalom,
például dohányzás – leggyakoribb okai a felső légúti köhögés szindróma, az
asztma, a refluxbetegség és a gyógyszer (ACE-gátló)-mellékhatás. A szerző a
közleményben összefoglalja a kórképekkel kapcsolatos legújabb szakmai
ajánlásokat, az oki kezelést, és rövid kitekintést nyújt a tünetei kezelés
lehetőségeire. Orv Hetil. 2020; 161(40): 1707–1710.
The Subaltern's Failure of Recognition in Shakespeare's The Merchant of Venice (1599)
Authors: Pandu Indiwara
Published: October 2020

This study seeks to find the struggle of self-recognition from the subaltern group by using the postcolonial psychoanalysis perspective. Shylock and Prince Morocco, considered to be inferior, are dealing with the recognition to make themselves as superior as the dominant class. From the analysis, supported by Fanon’s Black Skin White Mask (1952), recognition is one of the ways for the Other to enter western society. In doing this study, close reading is applied to analyze the following discussion: (1) the racial issue portrayed in The Merchant of Venice; 2) the struggle of the marginalized to gain the recognition; 3) The failure of recognition. Throughout the analysis, both Shylock and Prince Morocco fail to obtain recognition as a way to cross in western society. The constructed society based on western domination does not enable the subaltern to gain their recognition.
William Golding’s Lord of the Flies: A Reconsideration
Authors: Hasan Mariwan , Sharif Diman
Published: October 2020

This paper reconsiders William Golding’s Lord of the Flies. Allegorical writings can illustrate ethical, social or psychological and moral issues using the manipulation of images that have stipulated meanings other than their meanings as imitations of the actual world. Allegory has been used widely throughout history in all forms of art, and comprehensible for the reader, conveys hidden meanings through symbolic figures. Lord of the Flies had been written in relation to historical circumstances of the twentieth-century and to the personal experience of William Golding. Also, it has provided a critical analysis of the novel that treated the prominent perspective and elements in it. The novel is a parallel of life in the late twentieth century, while it looks like society a stage of enhancement in technology whereas, human morality is not completely mature yet. “Lord of the Flies is an allegorical microcosm of the world. The destruction of World War II because of the dictators who initiated this war has a profound impact on William Golding himself”. In the beginning, the paper gives an introduction to Golding’s point of view on humanity with the title of how to draw attention to me through allegory and fable, two forms of imaginative literature that encouraged the reader and listener to look for hidden meanings. Then it deals with William Golding’s Lord of the Flies from the cultural approaches of that time, who is one of the most prominent literary men of postmodernism that was famous for utilizing symbolism within the novel; “he used different kinds of symbols, characters, objects, animals, colors and setting to convey his message about his main theme”, in the last section we analyzed the postmodern features in Lord of the Flies and how they are used to depict Golding’s view. The way Golding uses allegory strengthens the symbolism of his novel. Finally, it tackles the educational value through his experiences in teaching along with critical analysis of Golding’s technique.
Ritual Deposit of the Sarmatian Age from the Barrow on the Lower Don Basin
Authors: Vlaskin Mikhail , Symonenko Aleksandr
Published: October 2020

Introduction. In 2007 the archaeological expedition of the State Autonomic Cultural Facility of Rostov Region “The Don Heritage” excavated burial ground Krasny IV in Aksay district of Rostov Region. In the mound of barrow No. 13 a bronze rod-shaped frontlet plate with a hook, a bronze lunula-shaped harness pendant, six bronze bridle roundels, a bone cheek-piece, and iron fragments of the, most likely, bits have been discovered. Methods and materials. In the study the standard methods of archaeological analysis are used: comparative-typological, the method of analogies, chronological, and cartographic ones. The materials are the discovered artifacts. Analysis. According to the conditions of location and composition, the assemblage from barrow No. 13 can be identified as a ritual deposit. Such assemblages are known in special literature as “hoards”, “strange assemblages” or “votive hoards”. They have been found in mounds of barrows or in natural hills without traces of human burials. Usually they consist of cauldrons or situlae (often the rest items are put into them), bridle sets with peculiar frontlet plate with a hook, silver and bronze phalerae, helmets of Western types, weapons (most often spear- and arrowheads), expensive and socially prestigious items (silver and glassware, jewelry). The presence of all these items in the ritual deposit is not necessary. These sites are concentrated in geographically opposite regions: the basins of the Southern Bug, Dniester and Prut and in the east of European Sarmatia – in the AzovDonbass, Don and Kuban basins, the Lower Volga basin and North Caucasus. Results. Close parallels to the frontlet plate, bronze lunula-shaped pendant, and bridle roundels were found in the South Bug basin (Marievka), the Dniester and Prut interfluve (Brãviceni), Romania (Zimnicea), the North Caucasus (Prochnookopskaya, Geymanovsky, Giaginskaya), the Don and Volga interfluve (Kachalinskaya). All of these sites are identified as ritual deposits of the late 2nd – 1st centuries BC. The assemblage from barrow No. 13 should be dated to the same time. The ritual deposits of Eastern Europe could be divided into two chronologically different groups. The sites of the early group (3rd – early 2nd century BC) have appeared in the North Caucasus and concentrated in the North-Western Pontic region. It is assumed that they belong to the Хsaiai, Saudaratai and Thissamatai mentioned in the Olbian decree in honor of Protogenes. The sites of the late group (the late 2nd – 1st centuries BC) in the Northern Pontic Region, the Don basin, the North Caucasus and adjacent territories belong, most likely, to the Sarmatians.
Burials of Sugoklea Barrow. Palaeopathological Aspect of the Study
Authors: Kozak Aleksandra
Published: October 2020

Introduction. The aim of the study is to identify the causes of differences in the diseases profile, as well as sex and age indicators of different groups of people of the Yamnaja and Babino cultures buried in Sugoklea barrow on the border of the steppe and forest-steppe areals of the Nothern Pontic region.

Methods. The basic classical methods for determining the individual sex, age and body height are used in the study. In the paleopathological part the frequency of dental, metabolic and infectious diseases was evaluated.

Analysis. The people of the Yamnaja culture buried in Sugoklea barrow represent a “randomly formed” group. The average age of death in men of the Yamnaja group is 45.7. In adults of the early group penetrating head injuries, traces of routine infections, and oncological diseases are determined; in children, the consequences of infections and deficient diseases caused by dietary restrictions during roaming are found. In the late group, several people show the symptoms of a latent form of tuberculous meningitis. The significant loads on the teeth (wear and tear, enamel injuries), especially after 30–40 years, the absence of caries, total calculus indicate the diet consisting of hard, unrefined, mainly protein foods. The pressure of environmental factors on the population of the Babino culture group was expressed in the high frequency of the prenatal stress markers. The number of individuals with episodic stress markers is small. Most men and women died between the age of 25 and 40 (possibly due to the negative influence of environmental factors). The complex of teeth and periodontium pathologies indicates a fibrous, proteinrich, mainly meat diet, as well as significant loads on the dental system caused by using dried fish and meat, shellfish, nuts for food. Both men and women had a high percentage of exostoses of the external ear canal along with a high incidence of middle ear diseases. This phenomenon suggests a certain dependence of the group on water resources.

Results. Both groups of the Yamnaja culture are parts of the migrating nomadic population engaged in grazing or exchange. The combination of pathological signs and occupational markers allows us to consider the group of the Babino culture as cattle-breeding populations and confirm the migration theory of the origin of the syncretic funeral rite in this region.
Ancient “Nomadology” – Knowledge of the Ancients About the Main Issues of Nomadic Studies
Authors: Medvedev Aleksandr
Published: October 2020

Introduction. Based on the study of the ancient literary tradition, the article analyzes the fundamental beliefs of the ancient Greeks and Romans about early nomads, the Scythians and the Sarmatians: origins of nomadism and nomads, their lifestyle, relations with settled neighbors, patterns of historical development of nomadic societies, etc. The interest of the Greeks and Romans in their contemporary nomads was largely explained by the fact that their lifestyles were very different.

Methods. The author discusses the formation of the image of a nomad from Homer to Herodotus, emergence of its mandatory attributes that eventually became a literary topos.

Analysis. The researcher points out the fact that it was Herodotus who gave a brief but comprehensive description of the Scythian nomadism in the fourth book of his Histories. Moreover, in his third narration about of the Scythians origins he actually described a phenomenon that was later called the steppe pulsation law. The paper also provides the analysis of the views of Aristotle toward the nature of nomadism and natural causes of nomadic lifestyle (Dionysius Periegetes). Based on the works of ancient authors, the author specifies several types of nomadism and stages of historical development of early nomads. It appears that the full cycle was completed only by the Scythians who created an early state. The author reveals its socioeconomic nature based on the exopolitary mode of production dominated by so-called remote (war, plunder, extortion of gifts) and tributary forms of exploitation of dependent settled populations.

Results. The analysis of the ancient narrative tradition shows that ancient authors who were contemporary to the Scythians and the Sarmatians made a number of important observations in the field of nomadology that later served as a theoretical basis for this emerging discipline.
The Impact of Alcohol Consumption on Academic Success and Athletic Identity in Collegiate Student-Athletes
Authors: Arnold Zoe
Published: October 2020

Upon entering college in the United States, students are exposed to alcohol and, relatedly, the potentially dangerous experiences and effects that come with consuming alcohol. This is especially true for collegiate student-athletes, who have been found to have the highest consumption rate among student groups on campus. The purpose of the study was to understand the relationship between how student-athletes at a focus university, a Division I member of the National Collegiate Athletic Association, experience alcohol consumption, how their consumption affects their academic grade point average (GPA), and how athletic identity plays a role in their experiences. While the research focuses on this one university, the findings are congruent with similar studies which focused on other colleges and/or the American college experience as a whole. Due to the large number of student-athletes in collegiate athletics, understanding and examining the correlation between alcohol consumption and the effect it has on academic success can be beneficial for multiple entities within a college dynamic. Survey data was collected from current student-athletes at a mid-sized Division I college in the Midwestern region of the United States. From this data, chi-square analysis showed that female student-athletes had statistically higher GPA than males, and a substantial sum of overall participants binge-drank during their last drinking occasion, and on both game and non-game days. A majority of respondents identify more with being a full-time athlete than being a full-time student. Results provide validity to past research studies, and allow for understanding to why student-athletes are at a higher risk of binge drinking. Practical implications and limitations are noted. Suggestions for future research include a larger sample from a variety of different universities, and understanding motivations between specific sports for academic success and alcohol consumption.

Keywords: alcohol consumption, identity, gender, sport, culture, academics
Research and Development of Mathematical Models of Elements of a Gas-Air Flow for Improvement of Automatic Control System of Organic Waste Processing Plant
Authors: Shakirov S. R. , Kvashnin A. G. , Pisarev A. V.
Published: October 2020

Recycling of organic wastes is an extremely important and challenging environmental task. One of the promising trends in this field is the creation of multi-mode (combustion, pyrolysis and gasification) plants for processing organic wastes with production of such useful products as thermal energy and energy carriers (biocoal, bio-oil, pyrolysis resins, synthesis gas, etc.) and fertilizers. When creating such plants, the main problems include instability of the properties of a source material, its high water and ash content. This drives the developers to use non-standard equipment and atypical control algorithms, the creating of which requires a lot of experimental work to be done. At the same time, conducting field experiments is an expensive, difficult and long process that highlights the need for extensive use of mathematical and computer modeling. In this paper, mathematical models of elements of the gas-air path of the organic waste processing plant are obtained. The characteristics of the gas-air path of the plant as of an object of regulation for pressure in the lower and vacuum in the upper part of the combustion chamber are determined. The gas-air flow consists of the flue and the air ducts and serves to remove flue gases from the combustion chamber and supply air needed to maintain fuel combustion. When developing new automation systems, modeling allows assessing the applied solutions accurately, simplifying and reducing the cost of their development, solving the problems of system stability, optimizing transient processes, etc. The nonlinearity of the obtained mathematical models on the "the pressure at the inlet to the n-th section air-gas flow path — the pressure at the outlet of the n-th section of the air-gas flow path" channels, the nonstationarity of objects of control and dependence of their dynamic characteristics on operating mode of the plant are determined. Due to developed models, the two-way relationship of the gas and air paths has been revealed. When modeling, the gas-air flow of the plant is divided into several sections for which the mathematical models are obtained. They are required to synthesize controllers of flue gases vacuum in the upper part and the air pressure in the lower part of the combustion chamber.
THE IMPACT OF TECHNOLOGIES OF THE INDUSTRY 4.0 ON INCREASE OF PRODUCTIVITY AND TRANSFORMATION OF INNOVATIVE BEHAVIOR OF THE INDUSTRIAL COMPANIES
Authors: Trachuk A. V. , Linder N. V.
Published: October 2020

Paper is devoted to interrelation research between investments in technology of the fourth industrial revolution, patterns of innovative behavior and productivity of the Russian industrial companies. Research is conducted on the basis of data of 576 industrial companies (874 respondents).

At the first investigation phase it is confirmed that technologies of the industry have the greatest impact on increase of productivity and transformation of industrial production 4.0: robotics, Internet of things, additive production, big data and analytics, cybersecurity. Besides, effects of introduction of technologies of the fourth industrial revolution are defined: financial, valuable, operational, innovative and technological development.

At the second investigation phase the interrelation analysis between investments is carried out to technologies of the industry 4.0, patterns of innovative behavior and productivity of the industrial companies with use of the modified CDM model. The received empirical results have shown that investments of the industrial companies in technology of the fourth industrial revolution increase productivity with elasticity 0,28 for high-tech industries; 0,21 – for the middle-technology, and 0,14 – for low-technology.

Investments in innovative activity have elasticity range from 0,04 (for low volumes of investments in new technologies) to 0,17 (at the high volumes of investments); the relations between investments in an innovation and growth of productivity aren't linear and have stable positive relation only after a certain critical mass of investments in new technologies is reached. Considerable influence on interrelation of investments in innovations and productivity is rendered by the characteristic of branch in which the company works: the firms working in high-tech industries, not only put in new technologies, innovative activity more, but also have more high efficiency caused by scientific researches and development; the companies of low-technology branches have negative elasticity of investments in innovations and productivity that is connected with influence of effect of unprofitability of investments into innovations (appropriability effect), that is the additional profit on investment isn't essential.
RISKS OF SUSTAINING THE CURRENT MODEL OF COAL COMBUSTION PRODUCT UTILIZATION ON RUSSIAN THERMAL POWER PLANTS
Authors: Zolotova I. Yu.
Published: October 2020

To assess the probability and potential scale of risks associated with sustaining the current model of coal combustion product (CCP) utilization on Russian thermal power plants.

This study adopts a qualitative approach. A panel comprising twenty experts was formed. Experts cores were derived using the Saaty paired comparison matrix.

The results of the study indicate that environmental, social and technological risks are among the most significant. The largest scale of effects can be expected from the potential increase in the negative effects from coal ash landfill to ground waters and the distribution of small-sized ash-slag particles as a source of air pollution.

Previous studies in Russia have largely dealt with technical aspects of CCP recycling or their potential application areas. However, the issues of the potential aftermath of low CCP utilization volume in Russia have not been properly assessed in prior research.
STRATEGIC SUSTAINABILITY OF INDUSTRIAL COMPANIES: АPPROACHES TO UNDERSTANDING AND RISK ANALYSIS
Authors: Kuznetsova M. O.
Published: October 2020

The article analyzes approaches to the strategic sustainable development of industrial organizations. Based on the review of Russian and foreign literature, three approaches to the strategic sustainable development of industrial organizations were identified: process, system and time approaches.

Based on the analysis of annual reports of Russian industrial organizations, it was possible to identify and systematize the risks that affect the strategic stability of Russian industrial organizations. Among the identified risks, the following risk groups are identified: country risks, legal risks, industry risks, foreign economic risks, market risks, production and technological risks, financial risks, reputational risks, environmental risks, information risks, social risks and strategic risks.

As a result of correlation and regression analysis, the most significant risks affecting the achievement of strategic goals of Russian industrial organizations were identified. These include: country risks, industry risks, and strategic risks. The obtained regression model allows us to predict the degree of achievement of strategic goals of Russian industrial organizations under the influence of various risks.
Soğuk Savaş: Amerikan Büyük Stratejisi, Johnson Doktrini ve Kıbrıs
Authors: Ataç Kaan Kutlu , Çam Mehmet Mert
Published: October 2020

Bu çalışmanın amacı özellikle Başkan Johnson yönetiminin Soğuk Savaş dönemindeki Amerikan Büyük Stratejisi’ni açıklamaktır. Bu çerçevede çalışma üç aşamadan oluşmaktadır: İlk olarak Amerikan Büyük Stratejisi’nin erken Soğuk Savaş’taki kuramsal çerçevesi çizilecektir. İkinci olarak, Büyük Strateji’nin uygulanabilirliğini sağlayan parametreler üzerinde durulacaktır. Bu doğrultuda 1948-1964 arası dönemde, Amerikan Büyük Stratejisi’nin sürdürülebilirliğini sağlayan ve mezkûr kuramı geliştiren doktrin ve kavram bazlı değişiklikler örneklerle irdelenecektir. Üçüncü aşamada Lyndon B. Johnson dönemindeki “Kıbrıs Sorunu” ve Amerika-Türkiye gerginliği, Büyük Strateji perspektifinde Merkezî Haberalma Teşkilatı’nın Reading Room’unda yer alan evrak üzerinden yorumlanacaktır.
Comparative analysis of arthroscopic techniques of anterior cruciate ligament reconstruction in adolescents
Authors: Salikhov Marsel R. , Avramenko Vladislav V.
Published: October 2020

Background. According to the considerably contradictory information across the international literature, both the anatomical and transtibial reconstruction of the anterior cruciate ligament (ACL), under similar conditions, yield good functional results from treatment. Therefore, it is important to evaluate the comparative effectiveness and the prospects of certain methods of ACL reconstruction. The purpose of this study was to analyze the possibilities and advantages of anatomical technologies for the reconstruction intervention.
Aim. To compare the outcomes of ACL reconstructions among adolescent children using different methods.
Materials and methods. The outcomes of 94 arthroscopic reconstructions of the ACL in adolescents were analyzed. The patients were categorized into 3 groups: Group 1 included 32 patients (34%) who underwent isometric plastic surgery of the ACL, wherein the femoral canal was formed using the transtibial technique. Group 2 included 30 patients (32%) who underwent anatomical plastic surgery of the ACL, with the formation of the femoral canal through additional anteromedial arthroscopic access. Group 3 included 32 patients (34%) who underwent the all-inside anatomical reconstruction of the ACL.
Results. A comparative analysis of the outcomes of reconstruction of the ACL among adolescents revealed that the anterior-posterior and rotational stability of the knee joint was better in group 3 patients than in groups 1 and 2 patients. In fact, the group 3 patients showed a significantly less positive pivot-shift (0 degree to 87.5%; I+ the extent of 12.5%) than the group 1 patients (0 degree 46.8%; I+ degree 25%; II+ degree and 21.9%; III+ degree and 6.3%), followed by the group 2 patients (0 degree to 86.6%; I+ degree 6.7%; II+ degree of 6.7%).
Conclusion. Considering the safety aspects of intra-articular structures and for the better anatomical orientation of the femoral canal, the all-inside method of ACL reconstruction yielded better outcomes of postoperative anterior-posterior and rotational stability of the knee joint.
Evaluation of tooth coronal index bicervical diameter in mesiodistal direction & modified kvaals method for age and gender determination using digital panoramic radiographs: A retrospective study
Authors: Sukhwani Jyoti , Deoghare Abhijeet , Fating Chinar , Jha Satyendra Kumar , Biranjan Rohit
Published: October 2020

Adequate Fluid and electrolyte balance in trauma patients is a task with complex decisions that are often complicated by coagulopathy and blood loss. An adequate volume of blood in the circulation is essential to maintain cerebral perfusion and vital function of the heart, kidneys, lungs, and other organs. Acute blood loss has been identified as one of the major causes of preventable deaths on arrival at hospital. The aim of fluid resuscitation should be to restore critical organ perfusion. This review discusses the availability of various options of Intravenous fluids and their co-relation with body’s demand in fluid management of trauma patients.
Evaluación de la formación de andradita y carbonatos de calcio durante la síntesis de un geopolímero a partir de escoria blanca ynegra
Authors: Ochoa-Franco Juan , López-Díaz Alfonso
Published: October 2020

En este artículo se evalúa la influencia de la andradita en la resistencia mecánica de un geopolímero sintetizado a partir de escoria blanca de horno convertidor y escoria negra de horno eléctrico. Como activadores se utilizó hidróxido de sodio 12 M y silicato de sodio 5 M. El hidróxido de sodio se mantuvo constante en 5% y en 15% en silicato de sodio. Se añadió material cerámico en proporciones del 5%,10%, 15% y 20%. El curado de la pasta se hizo a temperatura ambiente durante 24 horas. El tamaño de partículas de la escoria blanca y del material cerámico fue de 150 μm. Se utilizó XDR y MEB para analizar los posibles mecanismos de formación de la andradita y del carbonato de calcio. Se fallaron las muestras en la maquina universal de ensayos. Se determinó la influencia de los compuestos químicos formados en la resistencia a la compresión. Los resultados indican que las condiciones propuestas son adecuadas para la formación estructuras cristalinas propias de los materiales geopoliméricos
Aplicaciones de energía cinética enelectromovilidad autónoma y sostenible
Authors: Varela-Chávez Cristóbal
Published: October 2020

La principal limitación de los vehículos eléctricos es su dependencia de recarga en red eléctrica domiciliaria o electrolinera, de oferta limitada; condicionando la autonomía del automóvil. Es necesario estudiar alternativas de recarga o regeneración de energía para automóviles eléctricos; la energía cinética es una opción. Se realizó una revisión sistemática de literatura, usando los índices Scimago, Scielo, Google Académico y Doaj, seleccionando 23 de 40 artículos publicados entre 2007 y 2019, utilizando las palabras clave,energía cinética, electromovilidad, regeneración eléctrica, recarga de baterías, autonomía, vehículos eléctricos, frenado regenerativo, máquina eléctrica, amortiguadores acumuladores, KERS, sostenible.En 7 artículos se destacan ventajas de los dispositivos cinéticos para mejorar la autonomía versus la recarga de otros acumuladores; evidenciándose propuestas para mejorar la recarga o regeneración con opciones tecnológicamente posibles, pudiendo tener mejor desempeño; confirmando la necesidad de explorar aplicaciones cinéticas que apuntan a la electromovilidad. Esto permite pensar en automóviles eléctricos de mejor autonomía y costo-beneficio; con una visión de electromovilidad más sostenible.
Cuantificación del error humano en la cadena de suministro: caso de estudio en los servicios de transporte terrestre
Authors: Saavedra-Robinson Luis A. , Páez-Sarmiento Sergio , Ramírez Jhon F
Published: October 2020

Esta investigación presenta un acercamiento desde la ergonomía cognitiva en la determinación del error humano en el sector logístico, particularmente para el caso del transporte terrestre de carga. Para ello se aplicaron los métodos de Systematic Human Error Reduction and Prediction Approach –SHERPA y Success Likelihood Index Method –SLIM en tres empresas participantes del estudio. Se identificaron errores en la generación del costo del servicio (T1), en el ingreso de datos del servicio (T2), en la notificación a los clientes de las novedades del servicio (T3) y en la preparación de la documentación para los conductores (T4). Se cuantificaron los errores cuya probabilidad de ocurrencia oscilaron entre un 24,8% y 34,2%. Sedeterminó la fiabilidad de cada error como un sistema independiente, en cuyo caso el resultado arrojado para las tareas T1, T2 y T3 fue del 80% y del 75% para T4.
Academia, datos y reproducibilidad de la ciencia
Authors: Martínez-Méndez Alexander , Nuñez Luis Alberto
Published: October 2020

La pandemia de COVID-19 ha catalizado una serie de prácticas académicas y cuando la superemos, la geografía y, sobre todo la dinámica de los grupos de investigación será otra. Quizá seremos máseficaces, peroel rasgo que será másindeleble de ese cambio lo constituirá la incorporación cotidiana de prácticas de ciencia abierta, repetible y reproducible. El cambio cualitativo de la investigación a la “e-investigación”, describe nuevas formas de producción y diseminación del conocimiento e impone nuevas metodologías para manejar, administrar, analizar y preservar este “diluvio de datos”. La repetibilidad y la reproducibilidad de los resultados científicos en la ciencia centrada en datos ha sido detectado como un un problema creciente. Las publicaciones académicas están llamadas a transformarse, exigiendo acceso a los datos y aplicaciones computacionales que soportan los resultados. En esta nota editorial comentamos y reflexionamos sobre algunas de las metodologíasy herramientas que se disponen para promover la repetibilidad/reproducibilidad de los experimentos. Discutimos el enfoque metodológico que emerge del Instituto Turing del Reino Unido. Presentamos una evaluaciónde las herramientas para construir repositorios de datos que existen actualmente.
DEVELOPMENT OF AN APPROACH TO THE MANAGEMENT OF THE STRUCTURE OF WALL-FLOWING
Authors: Galushko I D , Salmina V A , Makaryants G M
Published: October 2020

The development of a prototype of an underwater robot with a variable geometry of the body is a major complex task, including a whole series of tasks of a scientific, technical, engineering and applied nature, and the creation of new automatic systems for managing it. The creation of such a robot will ensure its high autonomy and maneuverability. In this paper, the development of a solid model of a biomimetic robot hybrid and AUV with a variable geometry of the hull is presented. Also presented is a basic pneumatic circuit integrated into the robot body, which drives the pneumatic muscles fixed to the ribs of the robot's robust body. The experimental part includes the investigation of the vertical and horizontal components of the deformation of the walls of the shell, depending on the pressure supplied by the pneumatic system to the pneumatic muscles.
THE ESTIMATION OF ROLLER STRENGTHENING INFLUENCE ON THE ENDURANCE LIMIT OF SHAFTS WITH PRESSURIZED HUB
Authors: Pavlov Valentin Fyodorovich , Vakulyuk Vladimir Stepanovich , Sazanov Vyacheslav Petrovich , Efrosinin Arsenij Vital'evich
Published: October 2020

The influence of roller strengthening on endurance limit under bending of the 25 mm and 50 mm diameter shafts made of steel 20 and 25 mm diameter shafts made of steel 40X with a pressurized hub has been examined. Its been stated that the endurance limit of roller strengthened shafts with a pressurized hub depends not only on a value of compressive residual stresses in their dangerous section but on the character of its distribution. The valuation of a surface hardening influence on the endurance limit of shafts by the surface residual stresses criterion and the average integral residual stresses criterion has been shown that the average integral residual stresses criterion calculated through the parts dangerous section surface layer thickness equal the critical depth of the non-propagating fatigue crack can be recommended for the hardened shafts with a pressurized hub endurance limit increase prediction. Its been shown that on a diameter of a shaft with a pressurized hub raising it is necessary to increase a thickness of a hardened surface layer with compressive residual stresses.
STUDY OF THE STATIC CHARACTERISTICS OF THE WORKSPACE AR600E ROBOT
Authors: Shakhmatov Evgeniy , Ilyukhin Vladimir , Mezentsev Dmitry
Published: October 2020

The workspace is one of the most important parameters for evaluating robot flexibility and is important for optimizing robotic configuration, motion planning and control. Firstly, a kinematic model of the manipulator based on its basic structure was put forward. The systems of connection coordinates are established and the direct kinematic solution derived using DH methods. On its basis, the working space of the manipulator analyzed by the Monte Carlo method, based on random probability and software simulation MATLAB for the structural parameters of the robot. A cloud of workspace points has been compiled. Considering the problem of insufficient accuracy of the traditional Monte Carlo method in calculating the working space of the robot, an improved Monte Carlo method using the Beta distribution proposed.
REFINED STUDY OF STRESS-STRAIN STATE NEAR THE CRACK TIP UNDER CYCLIC LOADING IN A DAMAGED MEDIUM
Authors: Stepanova L.V.
Published: October 2020

The article is devoted to the fatigue growing crack problems in damagedmedia and mutual effects of damage on the evolution of the stress-strain statenear the crack tip and vice versa. The new asymptotic study of fatigue crackgrowth in an isotropic linear elastic material based on the continuum damagemechanics in the coupled (elasticity damage) formulation under plane strainand plane stress conditions is proposed. 1) The new numerical solution of thetwo-point boundary value problem for non-linear ordinary differential equationsto which the fatigue crack growing problem reduces is obtained; 2) The newanalytical presentation of stress, strain and continuity fields both for plane strainand plane stress conditions is given. The results obtained differ from Zhao andZhang’s solution where the original formulation of the problem for plane stressconditions has been proposed.
STATE OF EXTERNAL RESPIRATION FUNCTION OF STUDENTS IN THE DEPENDENCE OF CONSUMPTION OF PSYCHOACTIVE SUBSTANCES
Authors: Kretova I.G. , Berezin I.I. , Rusakova N.V.
Published: October 2020

The results of the survey and assessment with the help of specially developedquestionnaire of external respiration function of 393 students (73 youngsters and320 girls) at the age of 16–22 years from Samara universities are presented inthis work. The early beginning of familiarization with smoking is shown. Itwas detected that smoking youngsters and girls more often use other psychoactive substances (alcohol, drugs), in 18,8 % preference is given to strong alcoholdrinks. The incipient character of abnormalities in external respiration functionsfor smoking youth were identified.
MODULATION OF THE CIRCADIAN RHYTHM OF LOCOMOTOR ACTIVITY BY INSULIN
Authors: Mistryugov K.A. , Inyushkin A.N.
Published: October 2020

In chronic experiments, the effect of a single intranasal administration ofinsulin on the circadian rhythm of voluntary locomotor activity was studied. Aphase-advance of acrophase of the daily rhythm depending on time of insulinadministration was found.
ONE-VALUED SOLVABILITY OF A NONLOCAL PROBLEM FOR THE AXISYMMETRIC HELMHOLTZ EQUATION
Authors: Abashkin A.A.
Published: October 2020

A nonlocal boundary value problem for degenerate elliptic equation is considered. Boundary value of this problem considerably depend on low derivativecoefficient changes. Existence and uniqueness of a solution are proved.
ORTOGONAL COMPACT FUNCTIONS FOR NONLINEAR SPATIAL EQUATION OF VISCOUS TRANSONIC FLOW
Authors: Sewerin G.Yu.
Published: October 2020

In the article the unique algorithm of construction of the system of orthogonal compact V.L. Leontev’s type functions for the nonlinear spatial equationof viscous transonic flow is described by the method of Galerkin. The result ofdesigning on corresponding subspaces is system of ordinary differential equationswith a diagonal matrix.
ABOUT THE REALIZATION OF MONOAXIAL AND TRIAXIAL ORIENTATIONS OF COMPOSITION BODY OF TWO-BODY SYSTEM
Authors: Bezglasnyi S.P. , Mysina O.A.
Published: October 2020

In the work the problem about monoaxial and triaxial orientations of atwo-body system concerning Kenigov and random not inertial coordinate systemis put. The solution is gained by construction of active control which is realizedby a feedback principle. Stabilizing controls are synthesized and conditions underwhich the desirable asymptotically stable orientation is possible. The assignedtask is solved on the basis of modified method of Lyupanov’s functions, whichallows to use Lyupanov’s functions with sign fixed derivatives.
PHOTOSENSITIVE MATRIX BASED ON POROUS MICROCRYSTALLINE SILICON
Authors: Latukhina N.V. , Pisarenko D.A. , Volkov A.V. , Kitaeva V.A.
Published: October 2020

The article presents the results of experimental researches of optoelectric properties of porous silicon. Layers of porous silicon were formed using electrochemical etching process in water-alcohol solutions of hydrofluoric acid on plates with a pre-established microrelief surface. Evaluation of possibility of using of created structure as the artificial retina component was performed based on the results of the research.
A RECTANGULAR PLATE ON A TWO-PARAMETER ELASTIC BASE: THE ANALYTICAL SOLUTION
Authors: Bolshakov A.A.
Published: October 2020

In the paper the approximate solution for a problem of a rectangular plate on a two-parameter elastic base is suggested. The double series of beam functions satisfying elastic support boundary conditions are constructed. The analytical expressions for series function coefficients are obtained.
LOCAL SOLVABILITY OF SOME PROBLEM WITH FREE BORDER
Authors: Selivanova N.Yu. , Shamolin M.V.
Published: October 2020

A certain single-phase problem with free border is studied. The local solvability of such problem is proved. The more general method investigated earlier is used in concrete event in this work.
SYNTHESIS OF N-NITROPHENYL DERIVATIVES OF 1-ADAMANTYL-CONTAINED AMIDES
Authors: Goryachkina A.A. , Ermokhin V.A. , Purygin P.P.
Published: October 2020

A series of 1-adamantylacetamides with potential antimicrobic activity is synthesized from 2-, 3-, 4-nitroanilines, 2-nitro-4-methylaniline, 2,6-dichloro-4-nitroaniline.
THE ESTIMATION OF HYDROPHOBICITY AND THE ANALYSIS OF HYDROGEN BONDS IN THE MOST PERSISTENT CONFORMERS OF MOLECULES OF SYNTHESIZED ADAMANTYL-CONTAINING TRIPEPTIDES
Authors: Obukhov S.V. , Purygin P.P. , Stepanov E.A. , Zarubin Y.P.
Published: October 2020

Adamantyl-containing tripeptides with potential antiviral activity are synthesized. Applying methods of computational chemistry hydrophobic properties were estimated. Search of the most persistent conformers was made and the analysis of intramolecular hydrogen bonds to these peptides was performed.
FEEDING VARIABILITY OF ROUND GOBY NEOGOBIUS MELANOSTOMUS (PERCIFORMES, GOBIIDAE) OF SARATOV RESERVOIR
Authors: Kirilenko E.V. , Shemonaev E.V.
Published: October 2020

Seasonal and annual feeding dynamics of round goby Neogobius Melanostomus in Saratov Reservoir were investigated. During the research period food basis consisted of mollusks of genus Dreissena, other groups of zoobenthos were represented insigniﬁcantly. Seasonal changes of food spectrum and feeding objects ratio were caused by their biological development.
”DIGITAL DELETION” GAME AND RELATED ROOK GAME MISERE
Authors: Frolov I.S.
Published: October 2020

In this paper we investigate some properties including ultimate arithmetical periodicity of the function generated with the game ”Digital deletion”, and also the inverse function which is the Sprague-Grundy function for the misere form of rook game.
PARAMETERIZATION OF SLOW INVARIANT MANIFOLDS IN THE MODEL OF THE SPREAD OF MALARIA
Authors: Tropkina E.A.
Published: October 2020

In the paper the Ross Macdonald model of the distribution of malaria is considered. The order reduction of this model on the basis of parametric slow invariant manifolds is realized. As a result a simpliﬁed model which describes with a high accuracy the behavior of the solution of the original system is obtained.
THEORETICAL METHODS OF NANOSTRUCTURES INVESTIGATION
Authors: Saliy I.N. , Kolesnikova A.S. , Glukhova O.E. , Kirillova I.V. , Kossovich E.L. , Slepchenkov M.M. , Savin A.N. , Shmygin D.S.
Published: October 2020

In this work, a review is presented concerning the most modern theoretical methods aimed at investigation of various nanostructures properties. The basic concepts of ab initio methods, density functional, semi-empirical and empirical methods are considered. The applicability boundaries of calculation schemes utilized in the aforementioned methods are denoted.
MODELING OF POTENTIAL FIELDS BY METHOD OF BOUNDARY TRANSFORMATION OPERATORS
Authors: Parfenova J.A.
Published: October 2020

In the article the method of boundary transformation operators is offered. It supplements classical methods and allows to find the solution of regional tasks in the closed look that opens new opportunities in the simulation of potential fields. Application of the developed method allowed to solve a number of problems of potential theory and apply to the research a package of applied MatLab programs.