bluuebunny/crossref_metadata_2025 huggingface dataset:
Membrane integration into PDMS-free microfluidic platforms for organ-on-chip and analytical chemistry applications
Authors: Schneider Stefan , Gruner Denise , Richter Andreas , Loskill Peter
Published: April 2021

This review provides an introduction into membrane-based microfluidic systems and their application for analytical and organ-on-chip systems as well as a comprehensive overview of approaches for the integration of membranes into PDMS-free systems.
The interaction of size-selected Ru3 clusters with RF-deposited TiO2: probing Ru–CO binding sites with CO-temperature programmed desorption
Authors: Howard-Fabretto Liam , Gorey Timothy J. , Li Guangjing , Tesana Siriluck , Metha Gregory F. , Anderson Scott L. , Andersson Gunther G.
Published: April 2021

A loss of Ru–CO sites on the clusters suggests encapsulation.
Accelerated and scalable synthesis of UiO-66(Zr) with the assistance of inorganic salts under solvent-free conditions
Authors: Gu Yulong , Li Xiaolin , Ye Gan , Gao Zhen , Xu Wei , Sun Yinyong
Published: April 2021

The synthesis of UIO-66 (Zr) and its functionalized materials can be accelerated and scalable under solvent-free condition with the assistance of inorganic salts.
Diselenolene proligands: reactivity and comparison with their dithiolene congeners
Authors: Le Gal Yann , Roisnel Thierry , Barrière Frédéric , Mori Takehiko , Lorcy Dominique
Published: April 2021

Selenophene and diselenine were synthesized from diselenolene proligands.
Sustainable synthesis of AFe2O4 (A = Mg, Zn, Mn) catalysts: comparing the photooxidative and electrochemical properties towards organic dyes detection and degradation
Authors: Baby Jeena N. , Lavanya Chandrasekar , Wang Sea-Fue , Sriram Balasubramanian , Anantharaman Ashwini , George Mary
Published: April 2021

By serving as alternatives to toxic and hazardous solvents, green solvents assist in implementing the idea of sustainability.
Morphological modulation of azobenzene-containing tubular polymersomes
Authors: Li Lishan , Li Yiwen , Wang Shuyuan , Ye Liandong , Zhang Wei , Zhou Nianchen , Zhang Zhengbiao , Zhu Xiulin
Published: April 2021

Several external factors influencing the formation and morphologic transition of tubular vesicles were carefully investigated, including the initial polymer concentration, solvent, temperature, water adding rate, and light irradiation.
Influence of microstructural variations on morphology and separation properties of polybutadiene-based polyurethanes
Authors: Pournaghshband Isfahani Ali , Shahrooz Mahdi , Yamamoto Takuma , Muchtar Ansori , Ito Masateru M. , Yamaguchi Daisuke , Takenaka Mikihito , Sivaniah Easan , Ghalei Behnam
Published: April 2021

Polybutadiene-based polyurethanes with different 1,2-vinyl,cis, andtranscontents were synthesized. The correlation between the gas transport properties and phase behaviors reveals their tunable molecular separation for designing gas membranes.
Co9S8@carbon nanofiber as the high-performance anode for potassium-ion storage
Authors: Xin Wen , Wei Zhixuan , Yao Shiyu , Chen Nan , Wang Chunzhong , Chen Gang , Du Fei
Published: April 2021

Co9S8@carbon nanofibers with boosted highly active electrode–electrolyte area, fast kinetics and controlled volume expansion show an excellent cycling and rate performance in potassium ion batteries.
The influence of an external magnetic field on the dynamics of magnetite reduction with hydrogen
Authors: Chernavsky Petr A. , Kim Nellie V. , Andrianov Victor A. , Perfiliev Yurii D. , Novakova Alla A. , Perov Nikolai S.
Published: April 2021

The kinetics of hydrogen reduction of magnetite was investigated in different magnetic fields.
Effective reduction of nitrophenols and colorimetric detection of Pb(ii) ions by Siraitia grosvenorii fruit extract capped gold nanoparticles
Authors: Le Van Thuan , Duong Truong Giang , Le Van Tan , Phan Thanh Long , Huong Nguyen Thi Lan , Chau Tan Phat , Doan Van-Dat
Published: April 2021

Siraitia grosvenorii fruit extract capped AuNPs exhibited excellent catalytic activity in the reduction of nitrophenols and high sensitivity and selectivity for detection of Pb(ii) ions.
Directional mass transfer of azo molecular glass microsphere induced by polarized light in aqueous immersion media
Authors: Huang Hao , Wang Zenan , Li Xu , Yang Fan , Su Yechao , Xu Jianhong , Wang Xiaogong
Published: April 2021

Directional mass transfer of azo molecular glass microspheres is comprehensively investigated upon polarized light irradiation in various aqueous immersion media, and the key factors to influence mass transfer and shape deformation are elucidated.
Inhibitory properties of saponin from Eleocharis dulcis peel against α-glucosidase
Authors: Gu Yipeng , Yang Xiaomei , Shang Chaojie , Thao Truong Thi Phuong , Koyama Tomoyuki
Published: April 2021

Daucosterol from Eleocharis dulcis peel exhibits potent inhibitory activity against α-glucosidase.
Silicon-based fluorescent platforms for copper(ii) detection in water
Authors: Oggianu Mariangela , Figus Cristiana , Ashoka-Sahadevan Suchithra , Monni Noemi , Marongiu Daniela , Saba Michele , Mura Andrea , Bongiovanni Giovanni , Caltagirone Claudia , Lippolis Vito , Cannas Carla , Cadoni Enzo , Mercuri Maria Laura , Quochi Francesco
Published: April 2021

Covalent linkage of fluorescein to silanized silicon chips yields solid-state platforms for detection of copper(ii) in water. This architecture represents a step forward towards the fabrication of sensors for remote water analysis applications.
Reconciling structure prediction of alloyed, ultrathin nanowires with spectroscopy
Authors: McGuire Scott C. , Ebrahim Amani M. , Hurley Nathaniel , Zhang Lihua , Frenkel Anatoly I. , Wong Stanislaus S.
Published: April 2021

EDS and EXAFS spectroscopy are used as complementary techniques to investigate the local structure of bimetallic ultrathin nanowires. Results highlight the importance of using a combined approach to achieve an accurate understanding of these systems.
Enantioselective Michael addition to vinyl phosphonates via hydrogen bond-enhanced halogen bond catalysis
Authors: Kaasik Mikk , Martõnova Jevgenija , Erkman Kristin , Metsala Andrus , Järving Ivar , Kanger Tõnis
Published: April 2021

An asymmetric Michael addition of malononitrile to vinyl phosphonates was accomplished by hydrogen bond-enhanced bifunctional halogen bond (XB) catalysis.
Bifunctional Pt–SnOx nanorods for enhanced oxygen reduction and hydrogen evolution reactions
Authors: Huang Tzu-Hsi , Bhalothia Dinesh , Dai Sheng , Yan Che , Wang Kuan-Wen , Chen Tsan-Yao
Published: April 2021

Collaboration between Sn oxide and Pt offers a rapid pathway for rationalizing the high performance bifunction catalysts of Sn oxide decorated Pt nanorods both in the ORR and HER.
Uniform synthesis of palladium species confined in a small-pore zeolite via full ion-exchange investigated by cryogenic electron microscopy
Authors: Kim Yongwoo , Sung Jongbaek , Kang Sungsu , Lee Jaeha , Kang Min-Ho , Hwang Sungha , Park Hayoung , Kim Joodeok , Kim Younhwa , Lee Eunwon , Park Gyeong-Su , Kim Do Heui , Park Jungwon
Published: April 2021

Uniformly dispersed palladium species in small-pore zeolite are successfully prepared for catalytic applications, and are investigated by advanced microscopic methods.
Lead-free halide perovskites: a review of the structure–property relationship and applications in light emitting devices and radiation detectors
Authors: Gao Yuting , Pan Yufeng , Zhou Feng , Niu Guangda , Yan Chunjie
Published: April 2021

Lead-free perovskites have recently been successfully applied in radiation detection and light emitting devices.
S-synchronization and Excitation Constancy in Structural Identifiability Problem of Nonlinear Systems
Authors: Karabutov Nikolay
Published: April 2021

An approach to analysis the structural identifiability (SI) of nonlinear dynamical systems under uncertainty was proposed. S-synchronizability condition of an input is the basis for the structural identifiability estimation of the nonlinear system. A method for obtaining a set containing information about the nonlinear part of the system wasproposed. The decision on SI of the system was based on the analysis of geometric frameworks reflected the state of the system nonlinear part. Geometric frameworks were defined on the specified set. Conditions for structural indistinguishability of geometric frameworks and local identifiability of the nonlinear part were obtained. It shown that a non-S-synchronizing input gives an insignificant geometric framework. This input is a sign of structural non-identifiability of the nonlinear system. The method for estimating the structural identifiability of the nonlinear system was proposed. We show that the structural identifiability is the basis for structural identification of the system. The structural identifiability degree was introduced, and the method of its estimation was proposed.
Rhythm Drivers, Physical Properties, Mechanisms of Formation
Authors: Mazurov Mikhail
Published: April 2021

A mathematical model of the pacemaker is presented in the form of a nonlinear system of ordinary differential equations and in the form of a system of partial differential equations for distributed pacemakers. For the numerical study of the properties of the pacemaker, a modified axiomatic Wiener-Rosenbluth method was used using the properties of uniform almost periodic functions. Physical foundations, mechanisms of formation, properties of point and distributed pacemakers are described in detail.
Probabilities of Atomic Departures from the Slit System
Authors: Pletnev Leonid
Published: April 2021

The theoretical description of experimental data on transport in open systems has been of interest for more than a hundred years. Boltzmann proposed a new view of the transfer of matter. Now it is possible to describe the transfer processes from a microscopic point of view. The solution of the Boltzmann equation and the equations derived from it is a complex problem related to the mathematical problems of solving such equations. On the other hand, the complexity of the solution is related to the geometry of the system in which the transfer process takes place. Fundamental physical calculations are made for systems: flat, slotted, cylindrical, rectangular, etc. In the free molecular mode of gas flow, collisions of molecules occur mainly with the walls of systems. In this connection, there was a direction related to the calculation of the probabilities of atomic transport in the system. In this paper, we propose an approach for determining the probabilities of atomic outcomes from slit systems depending on the relative height of the walls of H systems. Exact formulas are obtained for calculating the probabilities of atomic departures from systems without colliding with walls, the distribution of atomic collisions over the height of the system wall, the probabilities of atoms entering the condensed phase after a single collision with the system walls, and the probabilities of atomic departures from systems after a single collision with walls. The accuracy of the obtained formulas was compared with the data obtained from computer experiments using the Monte Carlo method.
Application of Algorithms for Placement of Orthogonal Polyhedrons for Solving the Problems of Packing Objects of Complex Geometric Shape
Authors: Chekanin Vladislav , Chekanin Alexander
Published: April 2021

The article is devoted to the development and research of algorithms for placing objects of complex geometric shapes. To solve the placement problem is proposed an approach which consists in transforming the shape of all objects and further application of the developed algorithm for placing orthogonal polyhedrons of arbitrary dimension to the resulting transformed objects. In the process of transforming the shape of the objects being placed, they are initially voxelized, after which the developed decomposition algorithm is applied to the resulting voxelized objects, which provides the formation of orthogonal polyhedrons consisting of the largest possible orthogonal objects. The proposed model of potential containers is used to describe the free space of containers as a set of orthogonal areas. The developed algorithm for the placement of orthogonal polyhedrons provides a fast solution to NP-hard problems of placing objects of complex geometric shapes without resorting to the use of time-consuming nonlinear programming methods. Examples of the practical application of the developed algorithms for modeling the dense layout of parts of complex geometric shapes on the platform of a 3D printer are given.
Development of Experimental Prototypes for the Teaching of Science
Authors: Terán Guillermo , Ávalos Fausto , Lomas Washington , Quintana Iliana
Published: April 2021

The following document presents the development of educational experimental prototypes. The themes of the prototypes cover principles or concepts of physics. Like kinematics, oscillatory movements and shocks. Each prototype has sensors that allow measurements of the variables involved in the experimentation. At the same time, mobile applications are developed for devices with Android operating system, which allow the user to control the prototype from their cell phone and also view the variables measured by the experimentation prototypes. The applications also have a data export system that allows to obtain a file in csv format. In this way, the measurements are obtained in the form of a table to later be processed through office automation tools or other numerical computing software such as Matlab.
Mathematical Estimation Methods and Models for Industrial Companies
Authors: Stikhova Olga
Published: April 2021

The collateralized debt obligations and credit default swaps applications are shown in this paper. The industry obligations secondary market risk estimation methods are considered in this work. The new methods taking into account statistically significant parameters for industrial credit derivatives portfolio are offered for single-name investment risks numerical experiments realization. The mathematical estimation of tranche were shown. The single and multiple name default obligations necessary mathematical modeling methods and formulae for the industrial materials manufacturers derivative credit tools market are shown. It is determined that the portfolio of synthetic debt tools is made of the given parameters. The task of a loss derivative tranches mathematical estimation is solved. Late defaults raise the equity tranches payment required sums with high spreads, early defaults reduce. Also the functional characteristics required for an estimation huge debts problem solving are partly considered in this paper. The problem of the default modeling for market tools and numerical simulation of the obligations influence on conditions of current bistability mode are shown here. Some credit derivatives of industrial manufacturers are demonstrated in the modeling process of default as an example. It is found that the model is an additional factor help us to estimate the default opportunity.
Designing an Expert System for Recognizing the Emotional State of an Enterprise Employee
Authors: Sekin A.A. , Bychkova N.A.
Published: April 2021

The emotional state of an employee of any enterprise influences both the efficiency of work performance and the quality and stability of the final result. Management of production processes, taking into account the monitoring of the emotional state of the employee, is a rather urgent task that allows minimizing the risks of deviations from the specified level of product quality and production safety. However, the quality of the assessment of this influence is currently subjective and is based both on the personal opinion and competences of the expert conducting the monitoring, and on the tools used by him for assessing the emotional state. At the same time, the use of modern intelligent automated methods and tracking systems will reduce the distortion of expert judgment. Creation of an expert system for analyzing the emotional state of employees of an enterprise will make it possible to recognize the emotions of a particular employee with a fairly high degree of accuracy, accumulate a system of knowledge and generate analytical conclusions and predictions of behavior based on it, compile an emotional portfolio of each employee and draw conclusions about the ability to perform a certain type of work and current states. This paper presents the concept of an algorithm of an expert system (hereinafter referred to as ES), which is able, on the basis of the data obtained on the individual methods of non-verbal expression of an employee’s emotions, to assess the influence of his emotions on the quality of his work. The article reflects the results obtained in the framework of the implementation of the Agreement on research No. 05.601.21.0019 dated November 29, 2019.
Non-Stationary Temperature Behavior of Spindle Assemblies and Ball Screw Gears for High Precision Metal Cutting Machines
Authors: Kuznetsov A.P.
Published: April 2021

Typical temperature and thermoelastic models of structures of spindle units and ball screw systems of metal-cutting machines were considered. The features of determining the geometric and thermophysical parameters of these models were described in some detail. Both analytical and numerical solutions for estimating time-dependent temperatures are presented. The solutions were obtained for thermoelastic displacements of spindles and ball screw systems for various boundary conditions and limitations of deformations during heating due to the design of these elements of metal-cutting machines.
Methods of Mathematical Modeling of Automated Machine Systems of Multi-Nomenclature Production
Authors: Dumler Elena , Vakhitova Roza , Saracheva Diana , Makarova Tatyana
Published: April 2021

Automated machine tool systems for multi-product manufacturing were designed for processing parts of a certain nomenclature, which includes separate groups of parts, united by the design, technological, organizational and economic properties. To reduce the number of options in the structure of an automated machine tool system, a target nonlinear design function was applied. Technological conditions were formulated in such a way as to allow synthesizing alternative structures of the designed automated system. At this stage, a matrix of relations was built and a formalized description of technological conditions was given. Specific and generalized technological conditions, which take into account the graph of relations and compatibility condition formulated for any pair of elements, were considered. The article discusses the generalized technological conditions obtained on the basis of the synthesis of compatibility and follow-up properties. The existence of generalized technological conditions for the elements of the automated system of the same name was assessed. The interaction of the elements of an automated system during processing, when the condition of the following and compatibility of technological parameters are met, was studied. By analyzing the functional and technological structure of an automated machine tool system for multi-product manufacturing, the key relationships between its main elements were determined, and the technological environment, a key subject of the system research, was identified.
Influence of the structure on the collapse potential and shear strength of a residual soil in the semiarid region of Northeast Brazil
Authors: Santos Valteson da Silva , de Medeiros Allan B.Silva , da Silva Romário S.Amaro , Santos Olava F. , de Freitas Neto Osvaldo , Lira Bruna Silveira
Published: April 2021

In the last decades, several engineering works have been developed in the Northeast of Brazil, a region marked by the occurrence of collapsible and expansive soils. This work aimed to characterize and study the behavior of two samples of residual soils collected in the municipality of Salgueiro-PE regarding their collapse potentials and shear strength parameters, in natural and disturbed conditions, evaluating the influence of the applied vertical stresses and the structural arrangement in these properties. The results obtained showed that the two samples analyzed show collapsible behavior, however, the observed potential for collapse was lower after the original structure arrangement was undone. From the direct shear strength tests, the strength parameters of the two soils were obtained, which pointed effective friction angle close to 30° and cohesive intercept close to 0 kPa. The destructuring of the samples did not cause a considerable variation in these parameters. Thus, it was possible to conclude that for these samples the microstructure has a predominant influence on the occurrence of collapsibility, but does not have the same relevance on the shear strength, such that the material’s destructuring can be considered as an effective measure to reduce the potential collapse.
Microstructural analysis of collapsible soil before and after collapse and with loading and unloading cycle
Authors: Alves Ilton , Costa Larissa , Antonino Antônio , Costa Lícia , Ferreira Silvio
Published: April 2021

Aspects related to the volume variation of collapsible soils due to the change in water content are influenced by several factors, including the microstructure. The microstructure analysis of the soil is especially important in order to understand these aspects. This paper shows a comparative analysis of the microstructure of three samples of a collapsible Yellowish Red Sand from the district of Petrolina (northeast of Brazil), carried out by means of two techniques: Scanning Electron Microscope (SEM) and X-Ray Computed Tomography. Three undisturbed sample were used: the first no pressure was applied, in the second an one-dimensional compression of 160 kPa was applied and then the sample was unloaded, and in the third, between the compression and decompression, the sample was flooded with the occurrence of structural collapse. In the first sample, the soil microstructure is a matrix with a predominance of grains of sand clothed with iluvial clay with interconnected pores that confers instability. The second sample showed a reduction in macropores after loading. In the third sample the structure remained with a simple packing arrangement, however, there is a greater packing between the grains, in addition to the wetting-induced softening of the clay particles that fill in the voids. It is also observed, through the radiodensity analysis that at the top and bottom of the second and third samples there was an increase in volume due to the stress relief that is not observed in the central section of the samples. The two microstructure analysis techniques are complementary.
Soil-water resistivity curve of a tropical soil
Authors: Carnavale Thiago de Souza , Viana Ana Carolina de Campos , de Magalhães Paula Morais Canedo , de Campos Tácio Mauro Pereira
Published: April 2021

The evaluation of soil-water characteristic curve is one of the most important procedures in the matter of understanding the soil behaviour during wetting and drying processes. Even though it might be carried out by established methods, this practice is considered a time-consuming technique, and because of this it is still under-used in comparison with its potential applications. In this way, this paper aims to analyse the correlation of soil suction and soil resistivity to produce a time-reduced soil-water characteristic curve (SWCC), based on resistivity measured values. To perform this research, it was used a set of soil samples collected from Nova Friburgo, Rio de Janeiro – Brazil. The material was geotechnically characterized by standard methods. To determine the (SWCC), it was used the filter paper method and the volumetric water content/suctions were obtained by wetting and drying stages for two paths that emerged from the field moisture content. The results revealed a remarkable relationship between suction and the resistivity measured data, emphasizing the feasibility of determining the Soil-Water Characteristic Curve by resistivity measurements, here named Soil-Water Resistivity Curve (SWResC).
Thermal properties of a tropical unsaturated soil
Authors: Morais Thaise da Silva Oliveira , Tsuha Cristina de Hollanda Cavalcanti , Vilar Orencio Monje
Published: April 2021

Ground thermal properties, especially the thermal conductivity, are of paramount importance for the design of ground source heat pump systems (GSHP), used for space heating and cooling. However, very little information, if any, are available from the thermal characteristics of tropical unsaturated soils related to the GSHP application. To evaluate the thermal behaviour of a typical Brazilian tropical unsaturated soil, an extensive experimental investigation was conducted at the test site of the University of Sao Paulo at São EESC/USP) comprising Carlos (a detailed soil characterization; field monitoring of the seasonal groundwater table variation; soil and ambient temperatures, and matric suction of the top soil. This paper describes the investigation program and compares the thermal soil properties as measured in laboratory and field thermal response tests. The results were variable depending on the testing techniques; however, all results showed that the soil thermal conductivity is strongly influenced by the degree of saturation of the soil.
Influence of degree of saturation in the dynamic stress transmission to a deep foundation
Authors: Baltodano-Goulding Rafael , Brenes-Garcia Laura
Published: April 2021

The structural design of deep foundations depends on both the applied loads and the soil that will support them. However, during an earthquake this process reverses, and the seismic stresses are transmitted towards the structure through the soil. Proper design of deep foundations must account for the lateral loads imposed on the foundations by the dynamic loading. In order to assess the influence of soil saturation in the transmission of a dynamic load to a foundation, a dynamic lateral load pile design was performed using Reese’s p-y curve method. A series of suction-controlled dynamic triaxial tests were performed to obtain the Modulus of subgrade reaction at different matric suctions and seismic coefficients were back-calculated to perform structural designs. In general terms, it was observed that contemplating a saturated soil in the dynamic lateral load pile design does not represent the critical load case for seismic analysis.
Deterministic and probabilistic 3D analysis of slope rupture at BR 116 PR/SP highway in unsaturated soil
Authors: Riselo Bianca , Passini Larissa , Kormann Alessander
Published: April 2021

This research was developed with the purpose of presenting a deterministic and probabilistic assessment of the stability of slope located in state of São Paulo-Brazil, in the area denominated Serra Pelada, BR 116 PR/SP, with the incorporation of different suction scenarios in the unsaturated soil. The methodology was composed by 2D and 3D modelling of the slope, in the SoilVision’s SVSlope software, with the imposition of two water levels on the slope, one of 6.5 meters deep and another of 7.5 meters. The results demonstrate the variability of the probability of rupture, the safety factor, and the quantification of mobilized mass volume, in the six suction scenarios. As a result, it is possible to conclude with the analysis that the greater the surface suction in the unsaturated soil, the greater the safety factors of the slope and the lower the probability of rupture. It is also prudent to add that the incorporation of the variability of the geotechnical parameters in the probability analysis of stability, together with the 3D modelling of the slope, allow a more reliable analysis, presenting results of greater applicability in subsequent analyses. Finally, in conclusion, the studied slope is safe regarding its global stability for rupture.
Evaluation of antecedent rainfall effects in the analysis of the probability of transient failure in unsaturated slopes
Authors: Dantas Ana Paola do Nascimento , Cavalcante André Luís Brasil
Published: April 2021

The occurrence of extreme events of precipitation is commonly responsible for inducing surface mass movements in slopes. Landslides are due to the soil-atmosphere interactions. The main inducer of failure in unsaturated slopes is the infiltration, which triggers the reduction of suction, favoring the decrease of stability. Thus, this paper presents the implementation of analytical models to evaluate the probability of transient failure of slopes under unsaturated conditions for a local scale when subjected to antecedent precipitation. In this sense, the model proposed involves an analytical solution to Richards equation for unsaturated flow under transient conditions, capable of analyzing the soil behavior in the infiltration process. Therefore, these analytical models and the geotechnical parameters taken from the case study of a landslide that occurred in Nova Friburgo (Brazil) allowed the simulation of the infiltration process using the precipitation data corresponding to the day of the landslide, as well as four months previous to the collapse. The calculation routine is capable of generating the decreasing performance of the transient factor of safety and the increasing probability of transient failure through a probabilistic approach, allowing easy predicting failure and management of threat of landslides.
Probabilistic geotechnical designs in rural road infrastructure in Costa Rica
Authors: Baltodano-Goulding Rafael
Published: April 2021

Rural road infrastructure normally lacks information to perform rigorous geotechnical designs, due especially, to budgeting restrictions. Three different transportation projects in rural areas in Costa Rica are presented, where a probabilistic approach was followed. The statistical parameters selected from previous research can be used as local literature values to perform probabilistic geotechnical designs and analyses when there is not enough data to execute a statistical analysis in a project. Moreover, these values could be used to better understand values obtained from geotechnical site exploration and possible regional tendencies. It is possible to conduct probabilistic geotechnical design even when a project does not include a throughout site exploration, like in low-budget projects. Probabilistic design for rural road projects can be a useful tool in the pursuit of optimal and efficient designs where soil behavior is better understood.
Intercultural communication of the peoples of the North Caucasus
Authors: Bedoeva Irina
Published: April 2021

Currently, cross-cultural communications actualize the problems of multi-level dialogue, including ethno-cultural, linguistic and psychological aspects. The aim of the study is to study the cultural space of the North Caucasus in the context of the development of intercultural communications. Cross-cultural relations are caused by the interaction of cultures of different ethnic groups, which directly affects the development of social relations. Political, social and economic problems that have emerged in modern Russian society have negatively affected interethnic relations, in particular, in the North Caucasus. Armed conflicts have caused interethnic contradictions and caused great damage to interethnic and intercultural relations. Currently, everything necessary is being done to resolve conflicts. Thus, it is necessary to study modern communication processes, as well as the peculiarities of intercultural interactions in the North Caucasus. Currently, mutual intercultural communication in the dialogue of cultures sometimes leads to conflict situations. Its development leads not only to social peace and harmony, political agreement, but also to the settlement of inter-ethnic relations. Ways to resolve them will be more successful if ethnic groups have a social and national culture, the main task of which will be the settlement of various conflicts, the maintenance of peace and harmony. In the study of cross-cultural communications, the problem of preserving cultural identity is actualized. Among the peoples of the North Caucasus, a special role is played by socio-cultural communication, in particular, at the intercultural, intergroup and interpersonal levels.
Information system for environmental monitoring using adaptive semantic models
Authors: Shikhnabieva Tamara , Bulaeva Nurjagan
Published: April 2021

Effective environmental monitoring requires intelligent information systems. Developing such systems is associated with numerous challenges concerning the presentation, processing, and use of geochemical and environmental. The paper proposes several approaches to solving these problems, implemented using adaptive semantic models.
Digital technologies: problems and trends
Authors: Turluev Rizvan Ramzanovich , Mutsurova Zalina Musaevna
Published: April 2021

If “necessity is the mother of invention”, then the 2020 Pandemic (COVID-19) has forced many people around the world to rethink our daily lives from work to school and play. In response to travel bans, school closures, and advice not to gather in large groups and stay away from other people to limit the spread of the virus, many people have turned to digital tools to maintain some semblance of normality. Digitizing our workplaces and education is essential for us to be effective. Those companies that can make good use of technology to continue to evolve and rethink their business model for the future through rapid digital transformation will stay ahead of their competitors. So, the purpose of this article is to consider how digital technologies have transformed since 2020.
Cluster policy as a tool for implementing regional development strategy
Authors: Dorzhieva Elena , Dugina Evdokia , Belomestnov Victor , Garmaeva Lyudmila
Published: April 2021

In the 2000s, the socio-economic development strategies of almost all regions of the Russian Federation envisaged the formation and development of regional clusters (mostly innovative industrial ones). While the cluster policy had dirigiste nature: the list of potential clusters, the circle of participants, territorial and non-territorial boundaries, the expected effects of operation were determined by regional administrations. The same type of cluster development mechanisms and tools which do not take into account regional specifics and promising economic specializations have led to premature disillusionment in the cluster concept. Full-scale mature clusters can function successfully if their profile is consistent with the specifics of the region, including restrictive factors hindering economic activity (in the Baikal region this is the so-called "Baikal" factor). The article discusses the promising directions of clustering the economy of the Baikal region in the context of the cluster development of the subjects of the Russian Federation, substantiates the role of cluster policy in increasing the connectivity of the economic space of the country and its regions.
Development of the personnel controlling model of oil organizations
Authors: Gareeva Zemfira , Nizamova Gulnara , Avdeeva Larisa , Soloveva Irina , Musina Dilara
Published: April 2021

The purpose of the work is to develop proposals aimed at improving the personnel controlling model of oil organizations as a tool for managing the processes of personnel turnover. The experience of applying the system of personnel controlling in foreign countries has proven to be an effective system, providing the management with the relevant information base for timely tracking of changes in the indicators of personnel management and productivity indicators. There is theoretically confirmed interrelation between personnel turnover indicators and labor productivity that predetermines the necessity of monitoring of the given indicator in the system of personnel controlling. Meanwhile, the turnover rate itself is influenced by different internal and external factors. The suggested directions of improving the personnel controlling model consist in inclusion of the additional module, which provides the analysis of the statistical reporting; suggested system of the quantitative evaluation of the production personnel quality indicators; analytical procedure of revealing the reasons of the key personnel turnover by means of introduction of the block structure of the turnover factors evaluation of this personnel category, revealed by method of expert evaluation of the oil organization workers, which allows ranking those factors and timely develop the means of its solution. Theoretical and methodological basis of the research are the actual concepts of personnel management and personnel controlling systems study and development. Methods of expert evaluation, mathematical and statistical methods, correlation and regression analysis were used to carry out the task of estimation of the proposed recommendations.
New challenges of modern digital society
Authors: Bikalenko Maksim , Vekua Svetlana , Telegina Marina , Khabdaev Georgii
Published: April 2021

This article lays a particular emphasis on the study of the degree of influence of digitalization and globalization on the formation of trends in the development of modern digital society, on the development of companies and their business strategies. The increasing role of education in the regulation of technological processes by society in the context of the development and implementation of the latest approaches to improving the education system is noted. The importance of integrating the educational and technological spheres into the national processes of socio-economic growth through competent strategic management has been substantiated. The education system demonstrates ways of adapting society to digital challenges.
Formation of the future teacher’s readiness to work with gifted children
Authors: Seredkina A.S. , Fedotova E.L. , Nikitina E.A. , Kazorina A.V. , Shirina A.A.
Published: April 2021

The modern realities reflect the development trend of the leading education mainstream in the Russian Federation, the priority area of the state strategy - the formation of optimal conditions for effective education of a fundamentally new generation, prepared for active independent activity in developing scientific, strategic, and economic potential and increasing the status of a sovereign state both in the foreign and domestic policy of the country. Given the social needs of the population, the state order modernizes and forms new tasks, the paramount of which is the need to organize the educational process aimed at the successful formation and development of a citizen of Russian society, fully committed to finding and learning new things. A modern representative of a new society, undoubtedly, must have developed creative abilities, demonstrate pronounced talent in one or several spheres of activity, independently make important decisions, and realize the scope of responsibility and the need to choose consciously a path of personal development.
University and a non-profit organization activities for social adaptation of disabled people
Authors: Sergeeva Svetlana , Vagaeva Olga , Efimova Diana , Galimullina Nadiia , Lushnikov Alexander
Published: April 2021

The article views the issue of interaction between a university and an inclusive practices site for social adaptation of disabled young people. The following methods were used: analysis and synthesis, observation, interviews, and polling. The authors come to the conclusion that the results echo numerous works of other researchers. In this regard, it is essential to lay a fundamental basis of the inclusive world, which is possible under the following conditions: building a dialogue; competence of the subjects participating in the problem solving; systemic character of education and training. The research resulted in the designed program of partner interaction. To achieve the best possible results, it implies its stage-by-stage, systemic and comprehensive implementation in educational and cultural-leisure spheres, encompassing various aspects of social rehabilitation (social-environmental, social-psychological, social-pedagogical, socio-cultural, social-communal adaptation).
Neuropsychological rehabilitation of memory in post-stroke patients with brain nonspecific structure injury
Authors: Mardasova Tatiana Aleksandrovna , Iusupov Pavel Rafaelevich
Published: April 2021

The relevance of the study of the neuropsychological rehabilitation of memory impairments in stroke and the increasing role of the development of the rehabilitation direction to build a competent management system for such patients suggests good conditions for improving the health of the population, increasing the life expectancy and social activity of people.
Stable partnerships as a resource for a modern educational organization
Authors: Vezetiu Ekaterina , Vovk Ekaterina
Published: April 2021

This study examines the phenomenon of the formation of stable partnerships as the main resource of a modern educational organization, aimed at helping students acquire not only disciplinary competencies but also a system of moral and ethical values, social and creative abilities, psychological and social adaptability in the socio-cultural space, within whose framework they develop and shape as individuals and professionals. It also examines the essence and process of building such relationships in the higher education system. The study deals with comprehending the role of educational activity in the modern socio-cultural environment, and with revealing the theoretical foundations of the formation of joint activities in the context of an interdisciplinary and multifunctional approach. The main research method here is the method of questioning students from one of the leading universities of the Republic of Crimea: Federal State Autonomous Educational Institution of Higher Education “Crimean Federal University named after V.I. Vernadsky" on the topic "Revealing the role of joint activities and partnerships as a key resource of a modern progressive educational organization." Among the respondents there are representatives of various areas of training, different levels of education, and forms of education. It is important to note that not only the interpersonal partnership of students is assessed directly in the course of the educational process, but also their opinion regarding the existing external partnerships of the educational institution with other organizations that provide educational services to one degree or another. The study also considers pedagogical partnerships and partnerships between teacher and student. The research results are fully reflected and presented in the form of a complex analytical conclusion, which is of particular interest for further statistical, social and pedagogical research on this topic.
Welche Optionen bietet das neue Fachkräfteeinwanderungsgesetz für die OP-Pflege?
Authors: Hentschel Eleonora
Published: April 2021

Der dauerhafte Personalmangel im OP-Bereich und die daraus resultierende Mehrbelastung zwingen Klinikleitungen, neue Wege zu suchen, um Fachkräfte zu finden. Ist das im März 2020 in Kraft getretene Fachkräfteeinwanderungsgesetz eine Option, um dem Personalmangel im OP-Bereich zügig entgegenzuwirken?
Aufmerksamkeitsdefizit-/Hyperaktivitätsstörung bei Kindern und Jugendlichen
Authors: Jans Thomas , Häge Alexander , Hohmann Sarah , Romanos Marcel , Banaschewski Tobias
Published: April 2021

Die Aufmerksamkeitsdefizit-/Hyperaktivitätsstörung (ADHS) ist eine der häufigsten psychiatrischen Störungen des Kindes- und Jugendalters und zeichnet sich durch die Symptomtrias Unaufmerksamkeit, Impulsivität und Hyperaktivität aus. Die Störung beginnt in der Kindheit und persistiert oft bis ins Erwachsenenalter. ADHS ist zumeist begleitet von komorbiden Störungen, insbesondere Sozialverhaltensstörungen, affektiven Störungen und Angststörungen. Sie führt zu deutlichen Beeinträchtigungen des Funktionsniveaus und der Lebensqualität der Patienten und ist assoziiert mit einer Vielzahl von Risiken und weiteren Beeinträchtigungen. Die Therapie ist multimodal und richtet sich nach dem Alter der Patienten und dem Schweregrad der Symptomatik.

Die Arbeit gibt eine Übersicht über die Symptomatik der ADHS, die Ätiologie, die Diagnostik sowie die leitliniengerechte, evidenzbasierte Therapie. Dabei werden insbesondere psychosoziale und pharmakologische Behandlungsoptionen vorgestellt.
Intrapelvines Leiomyom als Ursache für gleichzeitige Darm- und Harntraktobstruktion bei einem Hund
Authors: Piroth Ana Cristina , Urbanschitz Tobias , Lederer Kristina A. , Lipnik Karoline , Degasperi Brigitte
Published: April 2021

Eine 8-jährige, kastrierte Mischlingshündin wurde wegen fehlenden Harn- und Kotabsatzes vorgestellt. Bei der rektalen Untersuchung ließ sich eine glatte, kugelige, derb-elastische Masse palpieren. Die Blutuntersuchung ergab eine 6-fach erhöhte Serumaktivität der Laktatdehydrogenase. Die Befunde von Röntgen, Ultraschall und Computertomografie lieferten den Verdacht eines Leiomyoms. Ein in Sedation unter Ultraschallkontrolle entnommenes Feinnadelaspirat war nicht diagnostisch. Bei der Laparotomie konnte die Masse extraluminal am Übergang vom Colon descendens zum Rektum lokalisiert und unter Schonung des Darms in toto reseziert werden. Die histopathologischen Befunde und immunhistochemischen Färbungen bestätigten die Verdachtsdiagnose eines Leiomyoms. Die Hündin konnte postoperativ Harn und Kot absetzen und präsentierte sich nach 6 Monaten weiterhin unauffällig. Sonografisch ergab sich kein Hinweis auf ein Rezidiv und die Aktivität der Laktatdehydrogenase war nur mehr marginal erhöht.
Arterial Function after a 246 km Ultra-marathon Running Race
Authors: Koutlianos Nikolaos , Sotiriou Panagiota , Christou Georgios , Pagourelias Efstathios , Anifanti Maria , Christou Konstantinos , Tsironi Maria , Andriopoulos Panagiotis , Kouidi Evangelia , Deligiannis Asterios
Published: April 2021

There is little research about the effects of ultra-endurance exercise on arterial morphological and functional properties. The aim was to assess the acute changes of the carotid-femoral pulse wave velocity and carotid doppler-derived parameters following an ultra-marathon race as well as the intima-media thickness of the carotid artery in ultra-marathon runners. Twenty athletes were examined at baseline and within 10 mins after a 246 km running race. Measurements included carotid-femoral pulse wave velocity, peak-systolic and end-diastolic velocities of carotid artery blood flow, pulsatility and resistivity indices and blood biochemical parameters. The intima-media thickness of the right and left carotid artery was measured before the race. Arterial stiffness and carotid artery intima media thickness at rest remained within known normal limits. The ultra-marathon race significantly increased carotid-femoral pulse wave velocity by 22.6% and pulsatility index by 10.2%. There was a decrease in body weight by 3.35% and an increase of all biochemical markers of muscle damage after the race. Additionally, C-reactive protein was correlated with both pulsatility and resistivity indices post-race. This study shows that immediately after a 246 km ultra-marathon running race, acute increase of arterial stiffness and vascular resistance were evident. The carotid artery thickness of ultra-marathon runners was within normal range.