bluuebunny/crossref_metadata_2025 huggingface dataset:
INVESTIGATION OF THE THREE-LINK CRAWLING ROBOTS MOVEMENT ON THE NONDETERMINATED SURFACE
Authors: Jatsun S. F. , Vorochaeva L. Yu. , Malchikov A. V. , Yatsun А. S.
Published: December 2018

Bionic principles of locomotion are the most promising for displacement and transporting equipment under the most difficult conditions. Robots gait based on the changing shape of the robots body and interaction with the surface by body parts, can find application when moving over rough terrain, in a closed space of technological and natural cavities, where the use of wheel-track or walking principle is not possible. In this paper, we propose the design of a three-link crawling robot equipped with two-coordinate active joints. The robot is equipped by supporting elements. Some supporting elements has adjustable friction coefficients, which allows realize various types of movement algorithms of the device. The article presents a mathematical model of a three-link crawling robot, which allows to study the process of robot movement, including case when the coefficients of friction of the surface under the supports are not equal to each other. In practice, the surface will most often have an inhomogeneous nondeterministic structure, which will lead to a deviation in straight-line motion. The paper proposes an algorithm and a diagram of an automatic control system that allows robot to move along a given path despite the indeterminate surface. This is achieved by using additional sensors: a digital electronic compass, an accelerometer, a GPS module. The paper presents the results of computational experiments and the results obtained during the full-scale tests of the prototype of a three-link robot motion. At the end of the article, a comparative analysis of the experimental and theoretical results confirming the adequacy of the developed mathematical model and computational algorithms is presented.
Comparative analysis of genotypes of Helicobacter pylori strains in the Rostov and Astrakhan regions
Authors: Sorokin V. M. , Pisanov R. V. , Vodop’janov A. S , Golubkina E. V. , Bereznjak E. A.
Published: December 2018

Objective:to study the infection of the adult and children’s population of the Rostov and Astrakhan regions by the bacteria Helicobacter pylori, to determine the frequency of H. pylori pathogenicity factors in diﬀerent age groups of the population.

Materials and methods:118 adults and 112 children were examined. Te presence of H. pylori DNA and the pathogenicity factors of CagA and VacA in the biopsy material of the mucous membrane of the antrum of the stomach was determined by PCR.

Results:a signifcantly smaller percentage of H. pylori–positive patients is characteristic of the child population. Te prevalent H. pylori genotype in the infant population is the avirulent genotype Vac s2m2 (60%) (χ2: p <0.005). Genotype CagA + VacAs1 VacAm1 is a marker of peptic ulcer for adult population of the Rostov region.

Conclusion:Te conducted studies allowed to establish diﬀerences in infection of the population with H. pylori bacteria and the frequency of the distribution of virulent genotypes depending on the region, age and severity of the pathology.
ÖRGÜTSEL DAVRANIŞ KONGRELERİ BİLDİRİLERİNDE “METAFORİK NEOLOJİZM” SORUNU ÜZERİNE ELEŞTİREL BİR İNCELEME
Authors: TUTAR Hasan
Published: December 2018

Amaç: Son zamanlarda özellikle
örgütsel davranış yazınında bilimsellik kaygısından uzak, yönetim moda ve
heveslerinin etkisinde çok sayıda çalışma yapılmaktadır. Bu çalışmalarda
genellikle “metaforik neolojizm” denilen ve dilin bağlamından koparılarak,
“semantik” ve “sentaks”ına aykırı, keyfi bir kullanıma dayalı ve içeriksiz bir
retorik kullanılmaktadır. Söz konusu çalışmaların bilimsel faaliyet adı altında
sunulması zaman ve zihin israfından başka bir anlama gelmediği düşünülmektedir.
Bu çalışmanın temel amacı son dönemde örgütsel davranış literatüründe sıkça
kullanılan “metaforik neoloji”lerin sorunsallaştırılması, bilimsel faaliyet
adına yürütülen ve yabancı literatürde “neolojizm” olarak ifade edilen “yeni
bir şeyler söyleme merakı”nın risklerine dikkat çekmektir. Araştırmada örgütsel davranış kongre bildiri başlıklarında metaforik
neolojizmin etkisi nedir sorusu cevaplandırılmaya çalışılacaktır.
Çalışmanın bilimsel kaygılardan uzak ve dilin temel anlam ve kullanım biçimine
aykırı “metaforik neolojizm”lerle kirletilmiş bir literatürün, genel olarak
bilimsel süreçlere ve özel olarak alan yazına herhangi bir katkısının
olmadığına dikkat çekmek gibi bir katkısının olacağı düşünülmektedir. Yöntem: Çalışmada 2013 yılından beri
yapılan 6 adet Örgütsel Davranış kongresinde sunulan bildiri başlıkları “metin
çözümlemesi” yöntemiyle analiz
edilerek sunulmuştur. İnceleme temel felsefesi itibariyle yorumsamacı ve eleştirel
bir anlayışla ele alınmıştır. Bulgular: Analiz bulgularına göre sunulan 561 bildirinin %33,12’sinde “metaforik
neoloji”lerle malul çalışmalar olduğu tespit edilmiştir.

Sonuç: Metaforik neolojilerle dolu bir
yazının yönteme, uygulamaya ve alana herhangi bir katkısının olamayacağı ve bu
tarz faaliyetlerin sözde bilimsel faaliyetlerden öteye geçmediği, zaman ve
zihin israfından başka bir işe yaramadığı düşünülmektedir.
Ацетилсалициловая кислота как эффективная и безопасная основа антиагрегантной терапии
Authors: Lievykh A.E. , Mamchur V.I.
Published: December 2018

В обзорной статье представлены сведения, касающиеся фармакодинамики, фармакокинетики, клинической эффективности и безопасности длительной терапии ацетилсалициловой кислотой (АСК) пациентов с сердечно-сосудистыми заболеваниями. Показаны основные практические способы уменьшения возможных осложнений со стороны желудочно-кишечного тракта. Убедительные положительные результаты клинических испытаний и так называемая желудочная токсичность АСК наряду с необходимостью длительного применения препарата в качестве антиагреганта стали основанием для появления различных лекарственных форм АСК: растворимых, с контролируемым высвобождением, покрытых кишечнорастворимой оболочкой, локальных, буферных, а также комбинированных средств, сочетающих в себе АСК и вещества с антацидным эффектом. К настоящему времени наиболее убедительные доказательства эффективности и гастроинтестинальной безопасности получены для кишечнорастворимых форм АСК.
Incorporating Software Curation into Research Data Management Services: Lessons Learned
Authors: Rios Fernando
Published: December 2018

Many large research universities provide research data management (RDM) support services for researchers. These may include support for data management planning, best practices (e.g., organization, support, and storage), archiving, sharing, and publication. However, these data-focused services may under-emphasize the importance of the software that is created to analyse said data. This is problematic for several reasons. First, because software is an integral part of research across all disciplines, it undermines the ability of said research to be understood, verified, and reused by others (and perhaps even the researcher themselves). Second, it may result in less visibility and credit for those involved in creating the software. A third reason is related to stewardship: if there is no clear process for how, when, and where the software associated with research can be accessed and who will be responsible for maintaining such access, important details of the research may be lost over time.

This article presents the process by which the RDM services unit of a large research university addressed the lack of emphasis on software and source code in their existing service offerings. The greatest challenges were related to the need to incorporate software into existing data-oriented service workflows while minimizing additional resources required, and the nascent state of software curation and archiving in a data management context. The problem was addressed from four directions: building an understanding of software curation and preservation from various viewpoints (e.g., video games, software engineering), building a conceptual model of software preservation to guide service decisions, implementing software-related services, and documenting and evaluating the work to build expertise and establish a standard service level.
APPLYING THE REAL TIME SHADOWING METHOD FOR CREATING SOFT SHADOWS IN OPENGL
Authors: Avdić Dženan , Rančić Dejan
Published: December 2018

This paper presents a technique for rapidly generating and rendering of soft shadows on the scene. The method has the advantage of real-time creating of shadows which look more realistic than hard shadows and have high quality, also it has not high demands in resources. The main idea is to replace a complex light source with a collection of multiple point sources of light in order to decrease rendering time. The mathematic model, experiments, and comparison with similar techniques are given and described.
Koroner arter hastalığında SYNTAX skorunun yeri
Authors: BAĞCI Ali
Published: December 2018

Kardiyovasküler
hastalıklar ülkemizde ve gelişmiş ülkelerde mortalite ve morbiditenin en önemli
nedenidir. Kardiyovasküler hastalıklar arasında en yaygın olanı ise Koroner
Arter Hastalığı (KAH) olup yüksek mortalite ve morbidite ile ilişkilidir.  Koroner arter hastalığının %99’unda  etyolojik neden aterosklerozdur. Ateroskleroz
nedeniyle oluşan KAH ciddiyetini belirlemede altın standart yöntem koroner
anjiyografidir. Koroner anjiyografi hem tanı hem de tedavi yöntemidir. Bu
nedenle anjiyografi görüntülerine dayalı bazı skorlama sistemleri
geliştirilmiştir. SYNTAX skoru  (SYNergy
between PCI with TAXUS and Cardiac Surgery) koroner arter hastalığının anatomik
ciddiyetini  derecelendirmede kullanılan  skorlama sistemlerinden biridir. Bu derlemede
koroner arter hastalığında SYNTAX skoru kullanımının incelenmesi ve
literatürünün güncel bilgilerle özetlenmesi amaçlanmıştır.
Automatiс Operation of a Rotary Garden Cultivator
Authors: Zvolinsky Viktor N. , Mosyakov Maksim A.
Published: December 2018

Abstract.The paper discusses the advantages of power-driven tillage tools as compared with machines with passive working elements, which provide for quick changing and controlling of the quality of soil crumbling, guided by the condition of the treated areas and the engine power of the power source used. (Research purpose) To develop a system for automatically maintaining the magnitude of a selected kinematic parameter during the operation of a rotary cultivator equipped with a hydraulic drive of working elements. (Materials and methods) The authors have conducted research involving patented materials on the use of automated process control systems for pre-sowing soil cultivation with tools featuring hydraulic actuators of working elements. (Results and discussion) It has been determined that the frequency comparison blocks may contain pulse shapers that are converted by the electronic control unit into a signal sent to a low-speed, high-torque adjustable motor of a Danfoss MGP-160 type. A system has been developed to automatically maintain the value of a selected kinematic parameter of a rotary cultivator by equipping its working elements with a hydraulic actuator with a two-stage hydraulic distributor controlled by an electronic unit that allows automatic adjustment of the required speed of the rotary drum cutters, optimal for the treated soil background. (Conclusions) The authors have identified a schematic diagram of an automated hydraulic drive of a rotary garden cultivator capable of tracking and adjusting the rotary drum speed.
Container Flow-Transport Technology of Selection Grain Production
Authors: Kryukov Mikhail L. , Pyshkin Viktor K. , Chulkov Andrey S. , Vlasova Svetlana V. , Ivanov Maksim V. , Stepanov Kirill A.
Published: December 2018

Abstract. Low-level mechanization is one of the main reasons for the high costs in selection and primary seed production. Crop breeders use transport and loading facilities for seed material transporting in an unsystematic manner. (Research purpose) Development of technology of transport support in selection and seed production, including all transport and loading processes of the delivery of grain seeds from selection combines to storage facilities using containers for seed collection, transportation, drying, and storage. (Materials and methods) The authors have described a container flowtransport technology of selection grain harvesting at the stage of primary reproduction and developed a machine complex technology and a database of harvesting and transport machines for seed collection, transportation, drying, and storage. (Results and discussion) The authors have determined the type of transport and loading means for the container method of seed harvesting, transportation and storage recommended for use in selection and seed production. There are four distinctive novelty positions of the presented type: the ability to transport containers in 2 rows; increased loading height from 2 m to 3 m; maximum operating radius reaches 3.8 m (vs. 2.7 m); increased cargo capacity – by 460 kg. (Conclusions) The authors suggest using the developed methodology to improve the technological process of harvesting, transportation and postharvest processing of seed grain, organize this process, as well as select machine parameters and technical equipment on the farms of the Central region of Russia. It has been suggested that test prototypes of containers and a loader with a container tilter should be designed and manufactured for use in primary crop processing.
Studies of the Combined Modes of Microwave Grain Drying
Authors: Pavlov Sergey A. , Pekhalsky Igor A. , Nikolay G. Kynev Nikolay G.
Published: December 2018

Abstract. To ensure the high quality of the materials being dried, one of the most promising ways to dehydrate vegetable raw materials is drying under the action of electromagnetic radiation (microwave drying). Microwave drying is widely used in various industries, in particular, in the food and woodworking industries. (Research purpose) Calculation of the microwave pulse and pause duration; their experimental determination, as well as the determination of the moisture removal rate at the pulse moment and the depth of pulse penetration into the layer. (Materials and methods) When drying in a microwave field, the gradient of moisture content in the material prevents the moisture movement towards the surface, internal cracks can be formed as well. Therefore, the combined methods of drying can yield the best results. The pulse duration has been calculated by the permissible increment of the grain temperature, the pause duration has been determined by assuming that during the pulse, moisture from the caryopsis kernel is pushed out and cooled under isothermal conditions by an air flow. (Results and discussion) It has been confirmed that at a microwave pulse energy duration of 4, 6, and 10 s, the speed of blow-off and blowdown of the layer with external air was 0.5 m per second. When grain is cooled by natural convection, the pulse time is 10 s, the pause time is 1, 2, 3, and 5 min. For the blow-off mode, the pulse exposure time was 6 and 10 s, that of blow-off - 0.5, 1.0, and 1.5 minutes. The maximum duration of the microwave pulse was determined by the flow density of allowable grain heating and the fraction of heat required for the evaporation of moisture when heated to 20-25 degrees. (Conclusions) The pause duration is determined by the grain cooling time to the temperature preceding the pulse. It has been experimentally established that the calculated values of the pulse and pause duration with an accuracy of 15 percent for grain with a moisture content of 20-24 percent at a microwave flow density of 0.7 kilowatts per square meter, at a depth of the microwave energy penetration into the grain by 70 percent, do not exceed 20-22 mm, and the moisture removal rate is 0.1-0.15 percent.
Mechanization of Root Crop Seed Production Technologies
Authors: Mikheyev Vladimir V. , Eremin Petr A. , Zernov Vitaliy N. , Petukhov Sergey N.
Published: December 2018

Abstract.The sugar beet seed production is currently employing a non-planting-and-transplant technology with the use of steklings. Planting units of the machines available on the market feature a number of drawbacks: low productivity, possible injuring of root crops, and increased labor intensity of operators. (Research purpose) To develop a universal design and parameters of an increased-productivity unit for planting steklings of sugar beet and other root crops. (Materials and methods) The design scheme and type of a planting unit have been chosen according to the requirements of applicability and versatility. Its preferred design parameters have been calculated as well. A prototype machine with a universal planting unit in the form of a cellular disk has been developed and manufactured in test production. (Results and discussion) The conducted field experiments proved the versatility of a planting machine with a disc-type unit used for planting root crops, including dimensional characteristics corresponding to those of steklings. The authors have found that when replacing a disk with a different number of cells of different sizes, the machine is suitable for planting a number of similar crops. A removable disk with 12-16 cells has been installed, with its angular speed decreased to 0.393-1.180 radian per second, which is lower as compared to the existing machines. Satisfactory agrotechnical tolerances have been provided for carrot planting in the soil at a depth of 12 cm, a step of 30 cm, and a deviation from the vertical of 110. The intensity of root crop laying in the cells of a seeding disk has been increased to 1-3 pcs. per second. (Conclusions) It has been found that the machine and the planting unit can increase the working speed up to 1.0 meter per second and reduce the labor intensity of operators to the level of safety requirements. The use of universal machines in the breeding and seed production of root crops will reduce the range of the applied machines and operating costs of farm enterprises.
Theoretical Study of Working Tool Placement in the Combined Unit
Authors: Uteniyazov Pulat A.
Published: December 2018

Abstract. The author proves that organic fertilizers, unlike the mineral ones, are capable of increasing yields over several years; they do not harm the environment and do not pollute the melon crop fields with nitrates. It has been clarified that their introduction is one of the most effective methods of humus conservation and soil fertility enhancement, which means obtaining fuller yields of high-quality melons and gourds. The NIIMESH researchers have developed a combined unit for local application of organic fertilizers for melons and gourds. (Research purpose) Conducting theoretical studies on the substantiation of the configuration of the working tools of a combined unit for local application of organic fertilizers. (Materials and methods) The author has conducted theoretical studies using methods of analytical geometry and theoretical mechanics. (Results and discussion) Analytical dependences have been obtained to determine transverse distances between furrow shapers used for applying organic fertilizers and making an irrigation groove, as well as longitudinal distances between the tractor's rear wheels and the furrow shapers applying organic fertilizers, between the furrow shapers and the fertilizer spreader, and between the fertilizer spreader and the furrow shaper making an irrigation furrow. (Conclusions) It has been determined that transverse distance between the working tools that make furrows for applying organic fertilizers should range between 0.9 and 1.3 metre, transverse distance between the working tools making an irrigation furrow and a furrow for the application of organic fertilizers is 0.45-0.65 metre. The optimal values of longitudinal distances have been found as well: between the tractor's rear wheels and the working tools making furrows for applying fertilizers – no less than 0.21 metre, between the tip of working tools and the fertilizer spreader – no less than 1.5 metre, and between the fertilizer spreader center and the tip of working tools making an irrigation furrow – at least 0.74 metre.
Performance Efficiency of an Energy-Saving Mini Dryer with a Combined Heat Supply System
Authors: Gasanov Umudvar R. , Magerramova Sevil A.
Published: December 2018

Abstract. The paper presents the description and operating principle of energy-saving mini-grain dryers for drying small grain batches on farms using conductive and convective drying methods and the process of grain cooling with heat obtained from a traditional heat source and a heat carrier prepared with a solar collector or a charged heat storage. (Research purpose) To develop and study a compact energy-saving grain dryer, with a heat supply system based on both a traditional source and a heat transfer fluid heated by a solar collector or a charged heat storage. (Materials and methods) The authors have carried out experimental studies of the drying process of wheat grain to determine the effectiveness of the developed unit for grain drying; the main condition for saving energy has been taken as the minimization of the total unit cost of the evaporation of one kilogram of moisture. (Results and discussion) The authors have conducted a two-factor experiment to determine the main optimal parameters affecting the grain drying process - the speed of grain movement in the conductive chamber and the temperature of the heating surface of its casing based on the calculated mathematical model. In the first variant, the drying process was carried out only by the conductive method using the heat from a traditional energy source. In the second variant, the drying was carried out by successive use of conductive and convective methods, and the grain was cooled using both thermal energy received from a traditional source and solar radiation heat along with the heat of the spent heat carrier. (Conclusions) The study has revealed that the most effective option in terms of saving thermal energy is grain drying with the consistent use of conductive and convective drying methods followed by grain cooling. The heat supply of the drying unit was partially carried out by using the heat of solar radiation and the heat obtained from the spent coolant recycling. In this optimal variant, the heat consumption for evaporation of one kilogram of moisture from the grain is minimal and amounts to 1.53-2.50 MJ per kilogram with a grain movement speed of in the dryer of 0.007-0.011 m per second and a heating surface temperature of 85-91 degrees Celsius.
THE FORMATION AND DEVELOPMENT OF CONCEPTS ABOUT THE DESIGN SCHEME OF STRUCTURES
Authors: Perelmuter Anatoly V.
Published: December 2018

The history of the formation and development of design model concept of a structure accompanied structural mechanics at all stages have is analyzed in the paper. The main principles used at constructing design models are considered. New problems arisen in the process of computer-aided structural analysis also are specified
NONLINEAR ANALYSIS OF STATICALLY INDETERMINATE WOODEN STRUCTURES AND OPTIMIZATION OF CROSS SECTION DIMENSIONS OF DOME RIBS
Authors: Pyatikrestovsky Konstantin P. , Sokolov Boris S.
Published: December 2018

The analysis of the behaviour of natural structures of laminated wood domes and the numerous preliminary calculations have shown the possibility of saving materials by reducing the height of cross sections of meridional ribs. This is especially effective when you include in design of skins, performing a role of building shell, the collaboration with frame elements (annular and longitudinal ribs). Multiple static indeterminacy of such structure allows its non-linear work and the redistribution of forces under nonuniform loads. At the same ime, the skin carries a significant part of the forces appearing in the shell and the ribs are underloaded. The tress-strain states of all elements are investigated. For the frame analysis the calculation is performed by the method of integral module that allows controlling strength resistance of a structure at any moment of its operation. The design recommendations for section dimensions of a shell are developed.
LONG-PERIOD SEISMIC IMPACTS AND IT AFFECTING ON THE STRENGTH OF HIGH-RISE BUILDINGS CONSTRUCTIONS
Authors: Nazarov Yuriy P. , Travush Vladimir I.
Published: December 2018

Currently, in all building codes, the diagrams of dynamics coefficient are limited to a maximum natural oscillation period of 1.8 s. However, this range is clearly not enough for the calculation of constructions of high-rise structures with characteristic basic periods of about 4-5 s and more. This article analyzes the available seis-mological data presented in the Center for Engineering Strong Motion Data (CESMD) database. The spectra of Tolioku earthquakes (Tohoku earthquake. Japan. March 11. 2011) and Emberley (New Zealand Earthquake. New Zealand. November 13, 2016) were studied, and dynamic factors for periods of natural oscillations of structures 4-5 s are calculated. The results of the study allow to establish reasonable values of dynamic coefficients in the field of high periods.
FUNDAMENTAL ERROR OF THE THEORY OF DURABLE RESISTENCE AND STANDARDS FOR REINFORCED CONCRETE
Authors: Sanzharovsky Rudolf S. , Ter-Emmanuilyan Tatyana N. , Manchenko Maxim M.
Published: December 2018

This article identifies and investigates the errors in the foundations of the modern theory of creep of reinforced concrete caused by the use of the principle of superposition, which is an extensive interpretation of the principle (scheme) of the linear superposition of Boltzmann. The results of the analysis published by the authors in the journal of Structural Mechanics of Engineering Constructions and Buildings No. 6 of 2017 and No. 3 of 2016 are supplemented. The article was written in accordance with the recommendations of the round table held in the RUDN University on June 9, 2016, under the guidance of D.Sc., prof. Krivoshapko S.N.
NON-RIGID KINEMATIC EXCITATION FOR MULTIPLY-SUPPORTED SYSTEM WITH HOMOGENEOUS DAMPING
Authors: Tyapin Alexander G.
Published: December 2018

This paper continues the discussion of linear equations of motion. The author considers non-rigid kinematic excitation for multiply-supported system leading to the deformations in quasi-static response. It turns out that in the equation of motion written down for relative displacements (relative displacements are defined as absolute displacements minus quasi-static response) the contribution of the internal damping to the load in some cases may be zero (like it was for rigid kinematical excitation). For this effect the system under consideration must have homogeneous damping. It is the often case, though not always. Zero contribution of the internal damping to the load is different in origin for rigid and non-rigid kinematic excitation: in the former case nodal loads in the quasi-static response are zero for each element; in the latter case nodal loads in elements are non-zero, but in each node they are balanced giving zero resulting nodal loads. Thus, damping in the quasi-static response does not impact relative motion, but impacts the resulting internal forces. The implementation of the Rayleigh damping model for the right-hand part of the equation leads to the error (like for rigid kinematic excitation), as damping in the Rayleigh model is not really “internal”: due to the participation of mass matrix it works on rigid displacements, which is impossible for internal damping
THE EXPERIENCE DIFFERENT OF PILING TESTING ON PROBLEMATICAL SOIL GROUND OF ASTANA, KAZAKHSTAN
Authors: Zhussupbekov Askar Zh. , Iwasaki Yoshinori , Omarov Abdulla R.
Published: December 2018

At the present time, in Astana city is going on works by construction public transport system LRT (Light Railway Transport). LRT is an overhead road with two railway lines. The first stage of construction is including construction of overhead road (bridge) with 22,4 km length and 18 stations. The foundation of bridge is the bored piles with cross-section 1.0HL5 m and length 8-КЗ 5 m. In these conditions, very important to control integrity of concrete body of each bored piles. For checking integrity- applying two methods - Low Strain Method and Cross-Hole Sonic Logging. The aim of this paper is to discuss the advantages and disadvantages of each method using the examples of a real application. The article presents loading tests of large diameter and deep boring piles on the construction site in new capital city of the Republic of Kazakhstan. Finally, some recommendations for testmg methods suitable for problematical ground conditions of Kazakhstan are introduced. Traditionally, pile load tests in Kazakhstan are carried out using static loading test methods. Static pile loading test is the most reliable method to obtain the load-settlement relation of piles. Results of static pile tests using the static compression loading test (by ASTM). static loading test (by GOST) and bi-direction static loading test (by ASTM) methods are presented in this paper. Experienced bored piles with length of 31.5 m. diameter 1000 mm. Hereafter the results of underground testmg by the piles with the methods of vertical static tests of SLT. BDSLT and SCLT are presented, which had been made on Expo 2017 projects, buildings of Pavilion m Astana. Kazakhstan.
DYNAMIC EFFECTS IN THE BEAM ON AN ELASTIC FOUNDATION CAUSED BY THE SUDDEN TRANSFORMATION OF SUPPORTING CONDITIONS
Authors: Travush Vladimir I. , Gordon Vladimir A. , Kolchunov Vitaly I. , Leontiev Yevgeny V.
Published: December 2018

A mathematical model of a dynamic process in a loaded beam on an elastic Winkler base with the sudden formation of a defect in the form of a change in the boundary conditions is constructed. The solution of the static problem of bending of the beam fixed at the ends serves as the initial condition for the process of forced vibrations hinged supported at the ends of the beam, which arose after a sudden break in the bonds that prevented the rotation of the end sections. Dynamic increments of stresses in the beam for various combinations of beam and foundation parameters are determined. determined.
ABOUT SEVERAL NUMERICAL AND SEMIANALYTICAL METHODS OF LOCAL STRUCTURAL ANALYSIS
Authors: Akimov Pavel A. , Belostotsky Alexander M. , Kaytukov Taymuraz B. , Mozgaleva Marina L. , Aslami Mojtaba
Published: December 2018

Numerical or semianalytical solution of problems of structural mechanics with immense number of unknowns is time-consuming process. High-accuracy solution at all points of the model is not required normally, it is necessary to find only the most accurate solution in some pre-known domains. The choice of these domains is a priori data with respect to the structure being modelled. Designers usually choose domains with the so-called edge effect (with the risk of significant stresses that could lead to destruction of structures) and regions which are subject to specific operational requirements. Stress-strain state in such domains is important. Wavelets provide effective and popular tool for local structural analysis. Operational and variational formulations of problems of structural mechanics with the use of method of extended domain are presented. After discretization and obtaining of governing equations, problems are transformed to a multilevel space by multilevel wavelet transform. Discrete wavelet basis is used and corresponding direct and inverse algorithms of transformations are performed. Due to special algorithms of averaging, reduction of the problems is provided. Wavelet-based methods allows reducing the size of the problems and obtaining accurate results in selected domains simultaneously. These are rather efficient methods for evaluation of local phenomenon in structures.
LIRA-SAPR PROGRAM FOR GENERATING DESIGN MODELS OF RECONSTRUCTED BUILDINGS
Authors: Barabash Мaria S. , Romashkina Maryna A.
Published: December 2018

The paper deals with technique of simulation for buildings at maintenance stage with account of changes in structural model during reconstruction. The authours suggest algorithm for linear and nonlinear analysis of structures in LIRA-SAPR program with account of erection process. Generation of design models for reconstructed buildings are illustrated with real examples from design practice (reconstruction of 3-storey office building with overstorey; reconstruction of 5-storey hostel with built-in nonresidential premises when floor slabs are changed; reconstruction of building with account of defects that were detected and strengthening that was made; reconstruction of 9-storey residential building where gaz was exploded, with account of defects that were detected and strengthening that was made).
THE GENERALIZED BIFRACTIONAL BROWNIAN MOTION
Authors: El-Nouty Charles
Published: December 2018

To extend several known centered Gaussian processes, we introduce a new centered Gaussian process, named the generalized bifractional Brownian motion. This process depends on several parameters, namely  α > 0 , β>0 ,  0<H<1  and  0<K≤1 . When  K=1, we investigate its convexity properties. Then, when  2HK≤ 1, we prove that this process is an element of the QHASI class, a class of centered Gaussian processes, which was introduced in  2015
ONE FEATURE OF THE CONSTRUCTIVE SOLUTIONS OF THE LATTICE GIRDER
Authors: Kirsanov Mikhail N.
Published: December 2018

The problem of the deflection of a planar symmetric statically determinable truss with a double lattice depending on the number of panels was solved in an analytical form. The angle of inclination of the ascending and descending rods of the truss is different. A load is applied to the truss, evenly distributed over the nodes of the lower chord. Special operators of the Maple computer math system and the induction method were used to generalize individual particular solutions to an arbitrary case. Formulas are obtained for the forces the most compressed and stretched truss rods. Cases of kinematic variability of the structure are revealed. A picture of the possible speeds of truss nodes in these cases is constructed. The asymptotic behavior of the deflection is found with a large number of panels and a fixed span length. The deflection was determined by the formula of Maxwell – Mohr.
NATURE SIMILAR TECHNOLOGIES IN CONSTRUCTION INDUSTRY
Authors: Lesovik Valery S. , Zagorodnyuk Lilia Kh. , Glagolev Evgeny S. , Feduk Roman S.
Published: December 2018

In modern conditions it is necessary to create high-tech, reliable and durable composites of a new generation with the required properties, and this requires qualitatively new approaches in the design, synthesis, operation, destruction and reuse of sources, that is based on the introduction of fundamentally new nature-similiar technologies. The great interest not only in Russia, but also abroad, present additive technologies. The article proposes the technology of using water-resistant and cold-resistant quick-hardening composite on the basis of gypsum binders of a new generation with finely ground mineral additives of different genetic types, in-cluding using a new unique type of mineral additives - waste from the magnetic separation of ferruginous quartzite. бионика, геоника (геомиметика), 3D-технологии, аддитивные технологии, композиционные гипсовые вяжущие, минеральная добавка, строительные композиты
La vacunación contra la viruela en la provincia de San Luis Potosí tras la expedición de Balmis: 1805-1821
Authors: Irisarri Aguirre Ana
Published: December 2018

La expedición de Balmis zarpó de La Coruña (España) en 1804 con la misión de llevar la vacuna contra la viruela a toda la población de la América hispana. Su intención era vacunar al mayor número de niños posible y, sobre todo, preparar a las autoridades de cada región para que continuara10n con la labor e hicieran llegar el nuevo remedio a toda la población, tanto del campo como de la ciudad. Este artículo tratará de mostrar —a través del análisis de los informes de las distintas autoridades de la región— hasta qué punto se puso en práctica este proyecto, a qué autoridades implicó, qué problemas tuvo que enfrentar, cuál fue la reacción de la población y qué resultados consiguió desde 1805 —año en que la expedición llegó a San Luis Potosí— hasta 1821, cuando terminó la época virreinal.
Los aires, aguas y lugares en las Antigüedades de la Nueva España
Authors: Delgado López Enrique
Published: December 2018

Francisco Hernández protagonizó, hacia 1570, una de las empresas científicas más importantes de la época moderna. Como parte de esta expedición recogió información sobre aspectos aparentemente ajenos a su formación científica; observó con peculiar maestría hechos que hoy reclamarían la historia o la antropología. En su observación a la cuenca de la Ciudad de México, plasmada en sus Antigüedades de la Nueva España, dejó un peculiar legado sobre los conceptos que la época le dictó, vigentes de alguna manera, acerca de la influencia del medio físico sobre el hombre.
América quarta pars: ¿isla o continente? El debate conceptual sobre el estatus geográfico del Nuevo Mundo en el siglo XVI
Authors: Lois Carla
Published: December 2018

América fue incorporada en la bibliografía especializada del quinientos como la quarta pars o cuarta parte de un mundo, concebido como la articulación de otras tres (Europa, Asia y África). Sin embargo, pronto quedaría expuesta una tensión conceptual: mientras que las tres partes del viejo mundo eran piezas de una gran isla, la cuarta parte era una isla en sí misma. Este es un análisis del debate conceptual y las propuestas teóricas que plantearon alternativas para definir el estatus geográfico del Nuevo Mundo, y demostrará que esa discusión no solo afectó la definición de América, sino que también inauguró el concepto moderno de continente.
Entre Roma y Jerusalén. Conciencia criolla y elogio a la ciudad de México en la obra de Juan de Viera
Authors: Jiménez Marce Rogelio
Published: December 2018

El objetivo del artículo es analizar cómo el sacerdote Juan de Viera utilizaba la loa a la ciudad de México y el guadalupanismo como elementos de identificación del criollismo novohispano, elementos que le permitirían afirmar que la capital del virreinato de la Nueva España estaba destinada a convertirse en la principal ciudad del continente, pues ella encerraba una gran riqueza material y espiritual.
Retrato de un olvido: Representación y reconocimiento de Salvador Rizo Blanco en el Retrato de Antonio José Cavanilles
Authors: Nicolás Gómez Paloma
Published: December 2018

Este artículo estudia el Retrato del abate Antonio José Cavanilles, director del Real Jardín Botánico de Madrid (1801-1804), pintado por Salvador Rizo Blanco. Propone un análisis a partir de los fragmentos de la obra para examinar su estructura, componentes y personajes. La intención es comprenderla en el marco del contexto global de la ciencia ilustrada, de relaciones imperiales de poder y explotación, donde las láminas botánicas (representaciones visuales) y las nomenclaturas (convenciones científicas y prácticas conmemorativas) son herramientas que aseguran la clasificación y apropiación de la naturaleza. La pintura de Rizo se entiende como un retrato doble en el que se entrecruzan el reconocimiento del pintor y el retratado, y como un nodo donde distintas realidades se encuentran, se entretejen y se ramifican hacia el futuro.
Conflicto y hegemonía en el suroccidente de la Nueva Granada, 1780-1800
Authors: Echeverri Marcela
Published: December 2018

En este artículo se estudian los conflictos en que se vieron involucrados los esclavos de la provincia de Barbacoas y los indígenas del pueblo andino de Túquerres, con énfasis en las tácticas usadas por ambos grupos, objeto de las políticas reformistas borbónicas, para comprender esa importante y poco explorada dimensión de la política de la monarquía hispánica. Al observar situaciones de crisis de las últimas dos décadas del siglo XVIII, que involucraron a esclavos e indígenas como agentes de violencia, a partir de juicios criminales, se analizan sus acciones y formas de argumentación para defender sus derechos. Las estrategias de la política popular basada en argumentos que se apoyan en la centralidad de la monarquía en la construcción de su identidad jurídica, permiten reflexionar sobre la naturaleza hegemónica del discurso monárquico y su particularidad en el contexto reformista del siglo XVIII.
Élite y comercio en el temprano siglo XVII rioplatense
Authors: Perusset Veras Macarena
Published: December 2018

El presente artículo trata sobre el proceso de construcción y consolidación de la élite rioplatense a principios del siglo XVII. Su objetivo principal es describir, analizar y discutir las estrategias que desplegaron ciertos personajes, que tenían el interés de constituirse en el sector dominante que estuvo al frente de los asuntos políticos, económicos y sociales de la ciudad de Buenos Aires hasta mediados del siglo XVII. Una parte fundamental de este estudio se concentra en el surgimiento del comercio ilícito por el puerto de Buenos Aires.
Editorial: New challenges and opportunities in corporate governance
Authors: Cucari Nicola
Published: December 2018

Corporate governance is “one of the most interesting, exciting and potentially dangerous disciplines” (Clarke, 2014) and, moving through different eras, new challenges are faced (Kostyuk et al., 2017) and new theoretical and methodological answers are necessary (Ananchotikul et al., 2009; Bebchuk et al., 2009; Boubaker et al., 2014; Kostyuk, 2003; Kostyuk et al., 2016; Kostyuk et al., 2014; Meier et al., 2013; Colbert et al., 2007; Dorata et al., 2008). Thus, in line with the aim of “Corporate Governance and Organizational Behavior Review”, it is important to deal with the governance issues not just in a strict approach of theories, instruments and policies, but also from the point of view of how shareholders, managers, employees, directors and other key stakeholders are engaged in the governance process and how their behavior influences the governance processes. The question arises if the actual boards are able to create a sustainable value for all actors involved and for society. This editorial seeks to highlight some of the challenges and opportunities within corporate governance research to further contribute to the development of effective corporate governance systems.
Managing mergers in a difficult era: Stock market and accounting evidence from Greece
Authors: Pazarskis Michail , Koutoupis Andreas , Pazarzi Georgia , Kyriakogkonas Panagiotis
Published: December 2018

The study examines the impact of mergers on stock market and performance of companies which were involved at mergers in Greece. Thus, the study, by using a sample of twenty-three listed companies which executed at least one merger (as acquirers) during the period of economic crisis, analyses nine stock market measures and ratios using simultaneously accounting measures extracted from corresponding financial statements. More specifically, we test a company’s performance by comparing a two-year span period before and after of all the merger events that took place within the period 2011-2015 (with data analysis from 2009 to 2017). The results of the study indicated that there is no statistically significant improvement or worsening for none of the examined variables in the post-merger period. In addition, we examined further merger characteristics, such as the method of payment and industry relatedness (qualitative variables). We observed statistically significant changes of a variable, in relation with the payment method, and in particular improvement of a variable when the exchange of shares is used as a payment method of a merger, instead of cash exchange.
The pulsed subcritical amplifier of neutron flux driven by high-intensity neutron generator
Authors: Babenko Vladimir , Pavlovych Volodymyr , Gulik Volodymyr
Published: December 2018

The subcritical reactor driven by external neutron source could apply as useful instrument for modern nuclear energy applications requiring high-level irradiation of different materials by the high-energy and high-intense neutron flux (e. g., nuclear waste transmutation, radiopharmaceutical production, etc.). The propagation of neutron pulses through the subcritical nuclear system was considered in the present paper. Simple homogeneous subcritical systems and a model of two-zone subcritical reactor were computationally investigated using Monte Carlo MCNP4c transport code. The propagation of one initial neutron pulse and series of one hundred neutron pulses through the presented subcritical nuclear models were simulated. In this study, the neutron multiplication factor, the neutron flux, the energy amplification factor, the total energy of neutrons in initial pulse, etc. were obtained and analyzed. The presented calculations have shown that the considered pulse subcritical systems can be successfully used as effective amplifiers of neutron flux from the initial source. The modeling results indicate that there is an achievement of a stable, high level of neutron flux caused by the accumulation of delayed neutrons from previous pulses in series of one hundred pulses for both homogeneous and heterogeneous systems.
Testicular cancer stem cell hypothesis - diagnostic and therapeutic implications
Authors: Dakovic-Bjelakovic Marija , Vlajkovic Slobodan , Bjelakovic Goran , Antic Milorad
Published: December 2018

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Possible risk factors for postoperative urinary tract infection following ureteroscopic lithotripsy
Authors: Jovanovic Mirko , Bancevic Vladimir , Kosevic Branko , Aleksic Predrag , Suljagic Vesna
Published: December 2018

Background/Aim. Ureteroscopic lithotripsy is today a safe method of endoscopic destruction of stone in the kidney and ureter with a small number of complications of which the most common is postoperative urinary tract infection. Risk factors for the occurrence of urinary tract infection after the ureteroscopic destruction of stones in the ureter and kidney are not clearly defined in the previous studies. Methods. The study included 389 patients with ureteroscopic lithotripsy and possible risk factors were analyzed: age of the patients, sex, diabetes presence, degree of hydronephrosis, stone size, stone localization, wear of ureteral JJ stent and percutaneous nephrostomy catheter, type of surgical procedure and duration of the operation. The frequency of postoperative urinary tract infection was statistically analyzed in relation to the possible risk factors. Results. Ten percent of the patients had postoperative urinary tract infection. The higher incidence of postoperative urinary tract infection was found in patients with diabetes (?2 = 22.918; p < 0.001), those who before surgery carried a ureteral JJ stent (?2 = 4.620; p = 0.040) and percutaneous nephrostomy catheter (?2 = 8.240; p = 0.004), who had a larger stone (?2 = -3.301; p = 0.001), and whose surgery lasted longer (t = 4.261; p < 0.001). Conclusion. The frequency of postoperative urinary infection and risk factors for its emergence in our study are in line with the results of studies by other authors. Patients with diabetes, who preoperatively carried JJ stent or a percutaneous nephrostomy catheter, who had large stones and in which the operating time is longer have a greater risk of developing postoperative urinary tract infection. Accordingly, the importance of identifying these patients in the preparation for ureteroscopic lithotripsy contributes to the appropriate preoperative preparation and decreases the frequency of postoperative urinary tract infection to a minimum.