bluuebunny/crossref_metadata_2025 huggingface dataset:
Quiste ovárico (Cistoadenoma mucinoso de ovario) retroperitoneal infectado como causa de peritonitis recurrente: Presentación de un caso
Authors: Andrade Salinas Roberto Paúl , Belalcázar Yajaira , Mora Christian , Vargas Verónica
Published: January 2021

Introducción: El cistoadenoma mucinoso retroperitoneal es una entidad benigna extremadamente rara cuya patogenia no se ha entendido bien. La presentación clínica y la sintomatología varían mucho y dependen en gran medida del tamaño y la ubicación de la lesión.
 Objetivo: Describir un caso clínico de quiste ovárico retroperitoneal infectado como causa de peritonitis recurrente.
 Material y métodos: Estudio descriptivo retrospectivo, presentación de caso clínico de quiste ovárico retroperitoneal infectado como causa de peritonitis recurrente.
 Resultados: Se presenta el caso de una mujer con cuadro clínico de dolor en hemiabdomen inferior de 15 días de evolución irradiado hacia región inguinal y muslo derecho, acompañado de alza térmica; presenta dos cirugías laparoscópicas previas por apendicitis aguda más colecistitis aguda y absceso en fosa iliaca derecha y pelvis hace 45 y 30 días respectivamente. Se realiza TAC encontrando masa heterogénea en retroperitoneo, mediante laparotomía exploratoria se evidencia quiste ovárico derecho retroperitoneal abscedado, con compromiso vascular por lo que se realiza exéresis en bloque de quiste ovárico, ovario y trompa de Falopio derecha. El resultado histopatológico reporta cistoadenoma mucinoso ovárico sin signos de malignidad.
 Conclusiones: El quiste ovárico retroperitoneal es una causa infrecuente de abdomen agudo inflamatorio recurrente, debe ser sospechada en pacientes femeninas con cuadros a repetición de dolor abdominal sin una causa filiada.
Aerial View Based Guidance System
Authors: Wasti Abhijan , Tripathi Saugat , Regmi Sandeep , Yadav Sanjeev , Kshatri Dinesh Baniya
Published: January 2021

With the limited amount of resources and roads available, traffic congestion seems to be the current leading problem for urban areas. Reliance on the traditional vehicular navigation systems seems to a huge contributing factor, which simply cannot meet the present demand for better traffic management. While the existent navigation system relies on the Global Navigation Satellite System (GNSS) and predefined historic navigation data, a real time optimal pathfinding navigation system has been lacking. We have proposed a close to a real-time system that calculates an optimal path from start to destination using floodfill algorithm and provides guidance to ground vehicles. A camera hovering over the top provides a bird’s eye view and via the Hyper Text Transfer Protocol (HTTP) on top of 802.11n protocol, transfers aerial view from the airborne device to Unmanned Ground Vehicle (UGV) where the actual computer vision processing is done in a local processor. The use of floodfill algorithm although requires an image that contains the whole maze but makes the system far more efficient. This makes it real time and efficient which may be further improved and integrated with actual traffic scenarios.
Performance Testing of Foldable Electric Powered Wheelch
Authors: Chaulagain Raj Kumar , Dahal Gaurav , Nepal Alkesh , Tiwari Amrit , Regmi Pramod
Published: January 2021

This paper aims to design and test a foldable, lightweight wheelchair propelled by a pair of electric motors. Starting from literature review, the research team carried out the design and solid modeling of proposed wheelchair. Solidworks software was used to make the computer model. The wheelchair frame comprised of a chair like frame with two pairs of wheels on front and back. The defined electric wheelchair is completed with the coordination of manual and electric system. A pair of electric motor is fitted on wheels at backside which are controlled by the electronic controller powered by the battery. The folding mechanism developed on the wheelchair was aimed for ease of transport and storage. The frame material was selected to be aluminum alloy. Lithium ion battery and geared electric motors were used in the prototype and motion control was done by joystick. Locking mechanism was used for frame locking during operation. The prototype was subjected to different tests. The unfolded dimensions of wheelchair were 850mm × 620mm × 1400mm (0.738m3) and whereas the folded dimensions were 1100mm × 620mm × 520mm (0.354m3) that resulted 52.03% reduction in volume. The mass of wheelchair was measured to be 22kg. The tested data of wheelchair was found to be 10 km approximately.
DEVELOPMENT OF CONCEPTUAL BASIS OF RISK MANAGEMENT IN THE OCCUPATIONAL HEALTH AND SAFETY
Authors:   Odessa National Polytechnic University, Bochkovskyi Аndrii
Published: January 2021

Purpose. Improve existing theoretical understanding of the mechanisms of risks occurrence and their minimization in the occupational health and safety. Method. The following research methods were used in the work: analysis of scientific and technical literature and international standards for risk management in the occupational health and safety – to improve the set of basic terms and concepts, as well as the risks classification; general logical methods – to establish and substantiate the mechanisms of risks occurrence to life and health of the employee in the “man – machine – environment” systems and the principles of their minimization. Results. The basic concepts and terms for objective and comprehensive implementation of the risk management process in accordance with the purpose and tasks of the functioning of occupational health and safety management systems at enterprises were substantiated and proposed for application. The factors impacting on the level of residual risk of occupational dangers occurrence, as well as the theoretical possibilities of achieving the minimum possible level of its values ​​within the functioning of “man – machine – environment” systems were determined and substantiated. The main factors that have a negative impact on the state of functioning of “man – machine – environment” systems and their nature were described. Mechanisms of the occurrence and minimization of risks to the life and health of the employee in these systems were established and substantiated, resulting in improving the principles of their management. Scientific novelty. The principles of risk management in the occupational health and safety, which were needed to identify and eliminate vulnerabilities (within the implementation of the Schuhart-Deming cycle), which are always formed during employee interaction with elements of “man – machine – environment” system under the impact of stochastic and non-stochastic negative factors were improved. Practical importance. The results of the research can be used to improve the international regulatory framework for risk management in the occupational health and safety, in particular the standards of the series ONSAS, ILO-OSH, ISO and others.
ASSESSMENT OF STABILITY OF MINING DEPARTMENTS UNDER IMPACT LOADS
Authors:   Public higher education institution Donetsk National Technical University, Liashok Iaroslav , Podkopaiev Serhii ,   Public higher education institution Donetsk National Technical University, Konopelko Yevhen ,   Public higher education institution Donetsk National Technical University, Simonova Yuliia ,   Public higher education institution Donetsk National Technical University, Petrenko Andriy ,   Public higher education institution Donetsk National Technical University, Osypov Kirill ,   Public higher education institution Donetsk National Technical University, Buleha Ihor ,   Managing Director, LLC “Elteko”, Ahafonov Oleksandr ,   PJSC “Donetskstal”
Published: January 2021

Purpose of work. The purpose of the research is to determine the conditions for ensuring the stability of mine workings in the coal massif under the action of shock loads. Methods. To achieve this goal, analytical studies were performed using the basic provisions of classical mechanics and the theory of elasticity. In laboratory studies, experimental samples of crushed rock were used, which were placed in a steel cylinder. Results. In the course of experimental research, the influence of the impact force and the impact pulse of the falling load on the response of the plane on a pliable basis with inhomogeneous, piece-sized, fragmented rock was studied. It is recorded that at a constant amount of energy of a single impact (mgH = 14.7 J), when the height of the fall of the load decreases 3 times (from H = 1.5 m to H = 0.5 m), and the mass increases from m = 1.0 kg to m = 3.0 kg, the magnitude of the impact force is reduced by 50%. With an increase in the amount of energy of a single impact (from mgH = 4.9 J to mgH = 44.1 J) at the same height of fall, when the mass of the load increases threefold, there is an increase of 2.5 times the impact force. At a constant amount of energy of a single impact (mgH = const), the displacement of the plane on a pliable base of crushed rock depends on the magnitude of the impact pulse of the falling load. Novelty. It is proved that when there is collapse of lateral rocks in the coal massif containing the production, the force of impact on the surface is proportional to the time of fall of the rock blocks to the time of their impact interaction with the plane. Practical significance. In deep coal mines, as a result of mining and the probability of shock loads from landslides, to ensure the stability of mine workings in excavation sites, it is advisable to use pliable supports or filling the produced space with crushed rock, which will ensure the integrity of lateral rocks.
INFLUENCE OF NATURAL MOISTURE ON THE CHARACTERISTIC TIME OF METHANE DESORPTION FROM COALS OF VARIOUS DEGREES OF METAMORPHISM
Authors:   Institute for Physics of Mining Processes of the National Academy of Sciences of Ukraine, Vasylkivskyi Vsevolod , Stefanovich Leonid ,   Institute of Physics of Mining Processes of the National Academy of Sciences of Ukraine, Chesnokova Oksana ,   Institute for Physics of Mining Processes of the National Academy of Sciences of Ukraine
Published: January 2021

Goal. To study the effect of natural internal moisture content on the kinetics of methane desorption from coals of varying degrees of metamorphization. Methodology. For the research, coal was used after a long (more than 100 days) preliminary exposure in a dry, closed indoors. The measurements were carried out on several samples of Donbass coals with different volatile content. Two groups of coal samples were used - dry, with natural internal humidity and one sample with artificial humidity of 1.5%. The volumetric method was used for measurements. The method includes three stages: 1st  saturation of coal with compressed methane, 2nd  preliminary discharge of compressed gas from a container with coal after its saturation, and 3rd  collection of methane released by coal into a storage vessel. Before registration of desorption, pressurized gas was discharged from the free volume of containers into the atmosphere. The desorption unit contains a low-temperature trap (78°C) for water vapor and a warming radiator for methane entering the storage vessel. To determine the numerical values of the characteristic time of desorption of methane from coal, we used information on the change in gas pressure in the storage vessel during desorption. To analyze the results, a method based on the concept of a change in the characteristic relaxation time of desorption during methane emission was used. Results. Experimental results show that in wet coals the ratio between the amount of methane in coal and the intensity of its outflow at any desorption site is less than in dry coals. It was found that in coals of the metamorphic series the presence of natural moisture leads to a decrease in the intensity of methane emission, a decrease in the characteristic desorption time and a decrease in the activation energy of methane desorption by 0.4 - 2.5 kJ / mol. The features of the kinetics of desorption indicates competition energetics of interactions between methane and water with the surface of the pores of coal. Scientific novelty. It was found that even without artificial humidification, but in the presence of natural internal moisture in coal, the degassing time during desorption is reduced (in comparison with dry coal). Practical significance. The research results can be used to optimize the duration of hydraulic saturation of the coal seam and the water consumption during coal degassing.
MINE FIELD TYPING BY GENERAL CHARACTERISTICS FOR MINE CONDITIONS OF «DTEK PAVLOGRADUGОL»
Authors:   Dnipro University of Technology, Vlasov Sergey , Timchenko Svetlana ,   Dnipro University of Technology, Moldavanov Yavhen ,   Dnipro University of Technology
Published: January 2021

Purpose. The purpose of the research is to optimize the parameters of calculations in the spatial modelling of geomechanical processes during the advancement of the face. Method. The statistical method of research of mining and technical and geological data is used in the work, which is aimed at collecting primary statistical material, processing, systematization and grouping by common features, from characteristics of individual elements to generalizing indicators in the form of absolute, relative or average values of ordering, data processing and interpretation. Results. The cluster analysis of conditions on mine fields is presented. Of the fifteen mining and geological parameters that affect the step of planting the main roof, two homogeneous groups of minefields were identified to simplify the calculations, and further, to find objective patterns. A dendrogram of minefield typification is constructed. Scientific novelty. On the basis of the collected materials of the technical documentation on the coal mining enterprises of DTEK Pavlogradugol, by applying cluster analysis, for the first time the minefields were typified with the help of mining and geological conditions affecting the efficiency of coal mining models. Practical significance. Cluster analysis will significantly reduce the amount of calculations in the modelling of geomechanical processes. To increase the reliability of calculations by probabilistic and statistical representations of the nature and mechanism of planting the main roof. The typification of conditions, in the future, will allow modelling of stepwise movement of the face in the spatial geomechanical model of the excavation site, to predict the impact of mining and geological conditions on the technology of treatment, which will increase the efficiency of coal mining in Western Donbas.
DEVELOPMENT OF A MODIFIED SELF-EXTENDING MIXTURE FOR INCREASING STABILITY OF ROCKS
Authors:   Donetsk National Technical University, Isaenkov Aleksandr , Sakhno Ivan ,   Donetsk National Technical University, Sakhno Svetlana ,   Donetsk National Technical University
Published: January 2021

Purpose. Search and analysis of rational forms of bottom rock strengthening at their block-discrete structure in the conditions of intensive raising in underground mine roadways. Method. The research methods used are a comprehensive approach, which includes: laboratory research on structural models, computer processing, analysis and interpretation of the results. Results. The urgency of the direction of increasing the stability of the rocks in bottom of the mine roadways by their local directional strengthening is indicated. The method of structural modelling conducted a series of studies on the installation, which was designed and assembled for the research. The influence of different schemes of strengthening block rocks in bottom of the mine roadways on the rock raising, vertical and horizontal convergence is determined. By comparing the areas of displaced rocks, calculated using a graphical editor, a conclusion was made about the effectiveness of each of the comparative hardening schemes. As a result, the scheme of hardening is determined, which allows restraining as much as possible the displacement of rocks into the roadway cavity. Scientific novelty. As a result of research it was found that when creating a bottom of the mine roadways, which is maintained in the conditions of repeated violation of its equilibrium state, a fortified zone in the form of a straight prism with the triangle of its base facing the bottom of the roadways, the volume of rocks extruded less than for the no-action model. The given form of the strengthened zone is the most effective. Practical meaning. A new method of local strengthening of bottom rocks, which can be represented by a block inhomogeneous medium, has been developed.
INVESTIGATION OF MAINGATES STABILITY IN STEEP COAL SEAMS AT EXTRACTION LAYOUTS OF DEEP MINE
Authors:   Donetsk National Technical University, Bachurin Leonid , Novikova Yuliia ,   Donetsk National Technical University, Simonova Yuliia ,   Donetsk National Technical University, Dovhal Vytalyi ,   Donetsk National Technical University, Boichenko Hennadii ,   Donetsk National Technical University, Kayun Oleksiy ,   Donetsk National Technical University
Published: January 2021

Purpose of work. Investigation of maingates stability in different methods of protection on the extraction layouts of a deep coal mine, which develops steeply inclined coal seams. Methods. To achieve this goal, mine experimental observation of maingates stability performed. Conditions for their maintenance are evaluated by the magnitude of the convergence of the side rocks on the contour and changes in the cross-sectional area of the gateroads. Results. As a result of the research the conditions of maingates stability in steep coal seams in protection by pillars or timber sets are substantiated. It is recorded that in the zone of influence of extraction operations, at a distance of l <60 m behind the mining face with the considered methods of protection, the support of the maingates is deformed within the yielding limits and has characteristic flexures the side of hanging wall. At a distance of l≥60 m, the cross-sectional area of the maingates is reduced to 50% of the initial values, and the amount of roof to floor convergence exceeds the flexibility of the support. The increase displacement of rock mass on the contour of the supported roadway behind the mining face depends on the strength and geometry of the secondary support structures above the maingate. Novelty. It is experimentally established that the change in the cross-sectional area of the maingate during protection by timber sets occurs linearly with increasing length of the extraction layout. Practical significance. To ensure the maingates stability, it is advisable to use non-pillar methods of protection, when using yielding secondary support systemsabove the roadway, or backfilling.
HYDROPHOBIZATION OF BASALT FIBER AND ITS INFLUENCE ON THE MECHANICAL CHARACTERISTICS OF SAND CONCRETE
Authors:   Odessa State Academy of Civil Engineering and Architecture, Barabash I.V. , Vorokhaiev A.I. ,   Odessa State Academy of Civil Engineering and Architecture, Ksonshkevуch L.M. ,   Odessa State Academy of Civil Engineering and Architecture
Published: January 2021

Abstract. The materials of the proposed article are devoted to the study of mechanical properties of sand concrete with the addition of hydrophobized basalt fiber and polycarboxylate superplasticizer Relaxol-Super PC. Adding hydrophobic properties to the basalt fiber causes a decrease of water consumption of fine-grained concrete mixture, which leads to improved mechanical properties of concrete. The aim of the work was to increase the mechanical characteristics of sand concrete by introducing hydrophobized basalt fiber into its composition. The objective of the research is to study the effect of hydrophobized basalt fiber on the mechanical characteristics of sand concrete. The polycarboxylate superplasticizer Relaxol-Super PC (Budindustriya, Zaporozhye) was used to increase the mobility of the concrete mixture. Basalt fiber Bauson-basalt 12 mm long and 18 ± 2μm in diameter was used as a fibrous filler. Sand concrete mixture was prepared in a laboratory forced-action mixer. Dosing of Portland cement, quartz sand and basalt fiber was carried out by weight, water and water-reducing additive ‒ by volume, taking into account the density of the additive. The fiber was introduced into a dry cement-sand mixture. After mixing for 120 ... 150 seconds, water with a dosed amount of additive was introduced into the mixture. The hardening of samples concrete took place under normal conditions in a chamber with a temperature of 20 ± 20C and a relative humidity of at least 95%. The compressive strength of concrete was determined by testing the halves of the samples – beams 4×4×16 cm in size at 28 days of age. The abrasion of the investigated concrete was determined by testing cube specimens with an edge of 7.07 cm on an LKI-3 device in accordance with the procedure set forth in DSTU B.V.2.7-212: 2009 “Building materials. Concrete. Methods for determining abrasion “. The impact resistance of concrete was determined from the results of testing cubic specimens with an edge of 7.07 cm on a vertical dynamic laboratory test machine. Especially effective is manifested positive role hydrophobization basalt fiber in combination with the water-reducing additive Relaxol-Super PC. The introduction of hydrophobic fiber (2 kg/m3) and Relaxol – Super PC (1.2% by weight of cement) into the sand concrete mix provides an increase in the strength of sand concrete by 45 ... 48%, impact resistance by 45 ... 50%. The abrasion of concrete is reduced by 36 ... 48% compared to the control.
PERSPECTIVITY OF USING STRUCTURAL INSULATED 3D PANELS IN THE CONSTRUCTION ON ENERGY EFFICIENT BUILDINGS AND STRUCTURES
Authors:   Vinnytsia National Technical University, Dudar I.N. , Yavorovska О.V. ,   Vinnytsia National Technical University
Published: January 2021

Abstract. The problem of energy dependence has been acute for all sectors of the national economy since the beginning of Ukraine's independence. At the same time, special attention is paid to the issues of energy saving in construction and urban economy, as cities use more than 85% of energy resources. The current situation is a consequence of the deformed structure of energy consumption, the use of outdated technologies in utilities, the slow implementation of energy-saving measures and technologies, and the lack of proper modernization of buildings and structures. Therefore, today the issue of researching building materials that would be energy-saving, primarily due to sealing and thermal insulation, is relevant. One of these building products is a composite building material ‒ 3D structural insulating panel (SIP). The article substantiates the possibility to using modern structural insulated panels in building. The main technical characteristics and features of the device of 3D panels are highlighted, indicators are given that confirm the relevance of this technology use in combination with the use of recuperators in construction. The basic structure of SIP panels is described in detail. The advantages and disadvantages of existing structural insulated panels are shown, both from the point of view of energy saving and from the point of view of the peculiarities of their use in general. It is calculated that the use of a SIP makes it possible to reduce the cost of construction in 2 times. For example, the cost of 1 m2 of the total area of the house is from $80, and when fully finished, it can be $300 per m2. At the same time, due to the high technical characteristics of the insulation, energy consumption for heating is significantly reduced. As a result of the study, it was proved that the use of SIP technology is a profitable solution, as it has a positive effect on the energy efficiency of a building due to its inherent design features. The relevance of the installation of these panels is confirmed by the fact that buildings, regardless of their purpose, have savings in energy costs in the amount of 65 ‒ 70%.
REGULARITIES OF FORMING THE STRUCTURAL STRENGTH OF VACUUM CONCRETE WHEN COMPACTING CONCRETE MIXES
Authors:   SHEE «Prydniprovska State Academy of Civil Engineering and Architecture», Storozhuk M.A. , Pavlenko T.M. ,   SHEE «Prydniprovska State Academy of Civil Engineering and Architecture», Abbasova A.R. ,   SHEE «Prydniprovska State Academy of Civil Engineering and Architecture»
Published: January 2021

Abstract. The paper presents the results of theoretical and experimental studies of structural strength and strength at the age of 28 days of vibrovacuumized and vibrated concrete. Structural strength is very important when moulding prefabricated or monolithic structures with immediate dismantling. Regularities of removal of a part of tempering water (liquid phase) from vibrovacuumized concrete mix, having capillaries of various form (round, square, formed by three or four cylinders), narrowing and expanding capillaries, and also capillaries of variable cross-section (with areas that expand and contract), are established as a result of researches. In such capillaries, the value of the capillary pressure is different and, accordingly, at different values of the external pressure, the liquid phase is removed. Also the value of breakdown pressure at which the liquid phase is removed from capillaries of variable section and with sites of small diameter is calculated. The high structural strength of vacuum concrete is theoretically substantiated. The results of experimental studies confirmed the theoretical developments and showed that the structural strength of freshly moulded vacuum concrete is 7…8 times greater than that of vibrated concrete from rigid concrete mix at the same W/C ratio, almost the same cement consumption and density. This significantly affects the strength of concrete substantiated with immediate dismantling. Due to the high structural strength, vacuum concretes do not show a decrease in strength at the age of 28 days during the moulding of structures with immediate dismantling compared to concretes, the dismantling of which was made in a day after moulding. Vibrated concretes from rigid concrete mix have such decrease in durability in the range 12…15%. These data indicate the advantages of vibrovacuumized concrete over vibrated concrete from rigid concrete mix.
FORMATION OF THE FOLK DECOR IN THE TRADITIONAL RESIDENTIAL ARCHITECTURE OF THE SLAVIC AND ROMANIAN PEOPLES
Authors:   Odessa State Academy of Civil Engineering and Architecture, Romanova O.V.
Published: January 2021

Abstract. Issues are discussed regarding the means of decorative and artistic expression in folk architecture (ornamental and plastic decor, artistic carving and painting, artistic forging), which are characterized by a certain symbolism that has developed in traditions. The type of the original form (natural, objective, constructive), which is the basis of the ideological and creative concept, is not always obvious, especially in geometrized, complexly stylized contours, that is why it is recognized only as a result of stage-by-stage research. The process of forming a decorative element is read through visual and morphological analysis. The author formulated the following research objectives: to discover the connection between the initial form and the final artistic image in the decor of traditional residential architecture; to identify the varieties of initial forms ‒ figurative prototypes; to reveal the course of compositional complication in the process of forming decorative means of expressiveness; provide relevant illustrative examples. The article examines the architectural decor used both on the residential building itself (wall planes, pediments, pilasters, etc.), and within the estate. Sometimes there are no analogues, and the creation of decorative furnishings is conditioned by a clear adherence to natural samples, and in some compositions there may be direct borrowings (citation) of stylistically established and well-known examples inherent in urban buildings. Comparing the samples of a certain ornamental motif, it is noticed that the drawn version can subsequently form the basis of the relief or sculptural variants, and the prototype shape predetermines the place (by the similarity of the contour features) for placing the decor. Hence - important observations about what kind of people may be inherent in the use of certain artistically designed architectural details. The table illustrates decorative elements of residential buildings and estates (stylization and transformation of the original form, the development of constructive and compositional design). Examples of the formation of folk decor in the traditional residential architecture of the Slavic and Romanic peoples (Ukrainians, Russians, Bulgarians, Moldavians, Romanians) are given. Conclusions are made and prospects for further research on this topic are highlighted.
HOUSING POLICY OF A BIG CITY: SOCIO-PSYCHOLOGICAL CONDITIONS AND REQUIREMENTS (RESEARCH ON THE EXAMPLE OF IVANO-FRANKIVSK)
Authors:   Institute of Architecture, Construction and Energy, IFNTUOG, Smadych I.P.
Published: January 2021

Abstract. This article is devoted to the study of the topical problem of qualitative accounting of socio-psychological conditions of human life in residential architecture, namely in the policy of forming the urban environment. The task of this study can be realized by analyzing the regulatory framework, namely, strategies for the socio-economic and spatial development of cities in parts related to housing construction, housing and communal policy, general planning and territorial principles of city development. Systematization and comparison of this information made it possible to single out the factors influencing the formation of design solutions and development in the city. Another important link in this study is the systematization of factors influencing the solution of the problems of forming a living environment. The aim of this study is to characterize the impact of socio-psychological requirements for environmental comfort in the context of housing policy in large cities. In accordance with the purpose of the study, the following tasks were formed: to streamline the system of socio-psychological factors and methods of their accounting in substantiating the housing policy of urban space; to analyze the socio-economic and spatial development strategies of the city of Ivano-Frankivsk for the last 5 years and sectoral documents of the architectural and construction sector and housing policy; to highlight the factors that underlie the formation of housing policy in Ivano-Frankivsk, to develop recommendations for taking into account the psychological aspects of society in the formation of housing policy in cities. The materials of this study are the aging of the socio-economic and spatial development of Ivano-Frankivsk for the last 5 years, as well as industry documents where the prospects for the development of the housing industry and housing policy are formed. The source base of the study to characterize the factors influencing the formation of the city's residential policy are scientific works on psychology, sociology, architectural sociology and public administration. The main research methods of this article are the method of factorial comparison. The methods of group comparison, and the graphical-analytical method of creating a structural model of factors and determining the place, as well as the role of socio-psychological factors in this model, were also used.
STATISTICAL ANALYSIS OF THE RESULTS OF GEODETIC SURVEYS OF OVERHEAD CRANES RAILS IN PRODUCTION BUILDINGS
Authors:   Central Ukrainian National Technical University, Pashynskyi V.A. , Tykhyi A.A. ,   Central Ukrainian National Technical University, Pashynskyi M.V. ,   Central Ukrainian National Technical University, Pichugin S.F. ,   National University «Yuri Kondratyuk Poltava Polytechnic»
Published: January 2021

Abstract. The studies were carried out in order to develop effective methodology for the statistical analysis of the results of geodetic surveys of the rails of overhead cranes. The findings will provide generalization of the measurement results, demonstration of their changes over time, as well as comparison with the permissible values of deviations from the design position. The analysis includes the results of geodetic surveys of the position of the rails of overhead cranes in machine-building shops during four years. The position of the heads of the crane rails was determined using a level, a transit theodolite, and a laser sight. In accordance with the requirements of regulatory documents for the operation of overhead cranes, three parameters of the position of the crane rail heads were controlled: the height difference on adjacent pillars of the same row; height difference on pillars of different rows in one transverse frame; deviation of the distance between the rails from the design value. The controlled parameters are random variables that should be analyzed by statistical methods. Deviations of the distance between the axes of the crane rails from the design value are presented in the form of a random variable with the normal distribution law. The differences in the elevation marks of the heads of the crane rails, which are monitored without taking into account the sign, are described by the distribution law of the modulus of a random variable. As a generalized characteristic of the state of crane rails, it is proposed to use the probabilities of horizontal and vertical deviations of the crane rails beyond maximum permissible values established by the norms. Based on the results of the research, conclusions were drawn about the need for systematic control of the position of overhead crane rails by geodetic methods, the applicability of the above distributions for the probabilistic description of deviations of crane rails from the design position, as well as the feasibility of using the probability of deviations of the crane rails geometry beyond the permissible values established by the norms.
LIMIT STATE OF ARCHES OF VARIABLE STIFFNESS
Authors:   Odessa State Academy of Civil Engineering and Architecture, Soroka М.М.
Published: January 2021

Abstract. An algorithm is proposed for numerically solving the problem of finding the maximum load for flat bar systems having a rectangular section of variable height. The material is elastoplastic; its physical properties are described by the Prandtl diagram. It is assumed that the compressive and tensile strength of the material are different. The modulus of elasticity in tension and compression is the same. The limiting state of a rectangular cross section under the simultaneous action of a longitudinal force and a bending moment is described. Using the proposed algorithm, a program was developed for calculating rod systems by the limit equilibrium. The C++ programming language was used to create a program for the numerical determination of the ultimate load for rod systems. The finite element method was used as the most universal to write a module that performs static analysis of the bar system. Its use makes it easy to design rod systems of arbitrary configuration with arbitrary boundary conditions. As a test example, a hinged circular arch loaded with a uniformly distributed vertical load is considered. Analytical dependences are written, which allow to obtain the ultimate load for an arch of variable section. Examples of calculating the limiting state of the arch and comparing the ultimate loads with and without longitudinal force are considered. The analytical solution is compared with the numerical solution found by the author's program. Good convergence of analytical and numerical solutions is shown. The proposed algorithm for the numerical calculation of the limit states uses the so-called direct method for finding the ultimate load. This allows not only to obtain the value of the ultimate load, but also to establish the order of formation of plastic regions in the sections of the rod system. The calculation algorithm does not imply the use of iterative processes, which has a positive effect on the speed of calculations. Within the accepted assumptions, the calculation methodology is accurate.
CARREAMENTO DE NUTRIENTES DO SOLO IRRIGADO COM ÁGUA SALINA MEDIANTE FERTILIZAÇÃO ORGÂNICA
Authors: EULER DOS SANTOS SILVA , ELIZABETH CRISTINA GURGEL DE ALBUQUERQUE ALVES , ANNE CAROLINNE RODRIGUES LINHARES DA SILVA , ROBSON ALEXSANDRO DE SOUSA
Published: January 2021

A irrigação é uma técnica milenar que supre as necessidades das plantas, entretanto, a água de boa qualidade em alguns casos não está disponível para ser utilizada. Uma alternativa a esse problema é a utilização de águas subsuperficiais ou de drenagem, que nem sempre apresentam características ideais (SILVA, 2013). O uso de salina pode comprometer a qualidade físico-química do solo, o desenvolvimento das plantas e, possivelmente, a contaminação do lençol freático causando um possível passivo ambiental. A hipótese desse trabalho é verificar se diferentes compostos orgânicos aplicados no solo cultivado com sorgo irrigado com água salina influenciam na perda de nutrientes do solo quando irrigado com água com alta salinidade. Nesse contexto, o objetivo deste trabalho foi avaliar o impacto que a salinidade da água de irrigação e o uso de compostos orgânicos podem influenciar no carreamento de nutrientes do solo.
PRIMEIRO RELATO DE ECTOPARASITISMO POR Amblyomma rotundatum KOCH, 1844 EM JIBOIA ARCO-ÍRIS DA CAATINGA (Epicrates assisi MACHADO, 1945).
Authors: AKSA INGRID VIEIRA BATISTA , LÍGIA VANESSA LEANDRO GOMES , KLEBER SILVA DE OLIVEIRA FILHO , THIAGO FERNANDES MARTINS , JOSIVÂNIA SOARES PEREIRA
Published: January 2021

A jiboia arco-íris da caatinga (Epicrates assisi Machado, 1945), também conhecida como salamanta-da-Caatinga, é uma serpente pertencente à ordem Squamata, família Boidae e subfamília Boinae. Possui dentição áglifa, portanto não-peçonhenta e chama atenção devido às suas escamas furta-cor quando expostas a luz solar, já que possui ocelos ao longo do dorso do corpo. Epicrates assisi possui ampla distribuição geográfica no Brasil, sendo encontrada frequentemente na caatinga, além de possuir hábito crepuscular/noturno. A espécie pode atingir até 2 metros de comprimento alimentando-se de lagartos, aves e pequenos roedores (DE ALMEIDA; SANTOS, 2011). As ectoparasitoses estão entre as principais afecções que acometem répteis de cativeiro, e devido à hematofagia, ainda que em baixos níveis de infestação, carrapatos podem transmitir diversos patógenos de interesse médico e veterinário, assim como causar a morte ou paralisia de serpentes devido à inoculação de toxinas durante o repasto sanguíneo (DURDEN; KNAPP, 2005; DANTAS-TORRES et al., 2005, 2008; HANSON et al., 2007; DE MELLO, 2013). Dentre os répteis que podem ser acometidos por carrapatos, há serpentes de diferentes gêneros e espécies. Dentre elas, as classificadas no gênero Epicrates que já foram registradas com infestação por algumas espécies do gênero Amblyomma, a exemplo de Amblyomma dissimile Koch, 1844 em Epicrates striatus fowleri Sheplan e Swartz, 1974 (DURDEN; KNAPP, 2005) e Amblyomma rotundatum Koch, 1844 em Epicrates cenchria (Linnaeus, 1758) (CUNHA et al., 2003). Considerando que para o Brasil e em especial para a região Nordeste deste país, os registros de ocorrência de carrapatos para répteis do gênero Epicrates são escassos e espaçados, o presente trabalho tem como objetivo relatar a primeira ocorrência de Amblyomma rotundatum em jiboia arco-íris da caatinga (Epicrates assisi) em João Pessoa, no Estado da Paraíba (PB), sendo esta cativa do Parque Zoobotânico Arruda Câmara.
DOSES DE FÓSFORO NO TEOR CRÍTICO DE P FOLIAR E NA PRODUÇÃO DO QUIABEIRO
Authors: JÚLIA KAROLINE RODRIGUES DAS MERCÊS , MARIA JOSÉ YÁÑEZ MEDELO , BRENO DE JESUS PEREIRA , ARILSON DE JESUS FRANÇA SOUZA , ARTHUR BERNARDES CECÍLIO FILHO
Published: January 2021

No Brasil, o quiabeiro encontra condições climáticas excelentes para seu desenvolvimento, em especial nas regiões Nordeste e Sudeste, uma cultura bastante cultivada por pequenos agricultores. (MOTA et al., 2008). O Estado do Maranhão apresenta condições agroclimáticas favoráveis ao cultivo do quiabeiro, que vem desempenhando papel estratégico socioeconômico para a agricultura familiar, além de sua importância alimentar e nutricional. No entanto, apesar da expressiva importância socioeconômica do quiabeiro, a forma de cultivo que ainda predomina é a familiar com baixo nível tecnológico, com escassez de informações sobre a fertilização da cultura. Praticada de forma empírica, a aplicação de corretivos e fertilizantes, geralmente, leva a mais desordens nutricionais, baixa eficiência, baixa produtividade, além de possível impacto ambiental. Dentre os nutrientes, o fósforo desempenha papel importante na planta, sendo requerido em muitos dos processos metabólicos (transferência de energia) e também como componente estrutural dos ácidos nucléicos de genes e cromossomos, assim como de muitas coenzimas, fosfoproteínas e fosfolipídeos (GRANT, 2011). Nesse sentido, o presente estudo foi realizado com o objetivo de avaliar o desempenho agronômico do quiabeiro e obter o teor crítico de P foliar para esta cultura em função de doses de fósforo
EFICIÊNCIA NO USO DE ÁGUA EM PRODUTORES DE MORANGO NA LOCALIDADE DE SÃO PEDRO, MELIPILA, REGIÃO METROPOLITANA, CHILE
Authors: ANDREA PILAR BAEZA VILLARROEL , NATALIA OVALLE , NÉSTOR SALAS , RONALD SÁNCHES , SEBASTIAN MARTÍNEZ
Published: January 2021

La producción de frutillas en Chile se concentra principalmente en las regiones del Maule y Metropolitana, las cuales abarcan el 80% de la superficie cultivada en el país (Pefaur Lepe, 2014). En San Pedro, comuna ubicada en la Provincia de Melipilla, Región Metropolitana, se encuentra el principal nicho productivo de frutillas para mercados internacionales y nacionales de la zona central del país (Municipalidad de San Pedro, 2019), principalmente en manos de pequeños agricultores que en promedio cuentan con 0,5 a 2 hectáreas productivas, lo que constituye la base del ingreso monetario para una gran cantidad de agricultores de la comuna (Consultorías Profesionales Agraria Ltda., 2015). La comuna se caracteriza por tener un clima semiárido, con influencia costera, la información climatológica de la zona en los últimos 30 años, nos indica que la temperatura media es de 13,9 °C, con una humedad relativa de 79%, precipitaciones anuales de 396 mm, evapotranspiración potencial de 1230 mm y un déficit hídrico acumulado de 987 mm, evidenciando los efectos del cambio climático y aumento en la escases del recurso hídrico de la zona (Santibañez, y otros, 2014). La provincia de Melipilla ha sido declarada “zona de escasez hídrica” durante varios años consecutivos, indicando la fuerte falta del recurso y la sequía que afecta a la zona en los últimos 10 años, es por esta razón que es vital realizar un manejo eficiente del recurso hídrico, implementado técnicas de eficiencia de uso de agua y teniendo en consideración que más del 70% del reservorio de agua del país es destinado al rubro agropecuario
An evaluation of the SAFIRE grading scale as a predictor of long-term outcomes for patients in the Barrow Ruptured Aneurysm Trial
Authors: Catapano Joshua S. , Labib Mohamed A. , Frisoli Fabio A. , Cadigan Megan S. , Baranoski Jacob F. , Cole Tyler S. , Zhou James J. , Nguyen Candice L. , Whiting Alexander C. , Ducruet Andrew F. , Albuquerque Felipe C. , Lawton Michael T.
Published: January 2021

OBJECTIVE

The SAFIRE grading scale is a novel, computable scale that predicts the outcome of aneurysmal subarachnoid hemorrhage (aSAH) patients in acute follow-up. However, this scale also may have prognostic significance in long-term follow-up and help guide further management.

METHODS

The records of all patients enrolled in the Barrow Ruptured Aneurysm Trial (BRAT) were retrospectively reviewed, and the patients were assigned SAFIRE grades. Outcomes at 1 year and 6 years post-aSAH were analyzed for each SAFIRE grade level, with a poor outcome defined as a modified Rankin Scale score > 2. Univariate analysis was performed for patients with a high SAFIRE grade (IV or V) for odds of poor outcome at the 1- and 6-year follow-ups.

RESULTS

A total of 405 patients with confirmed aSAH enrolled in the BRAT were analyzed; 357 patients had 1-year follow-up, and 333 patients had 6-year follow-up data available. Generally, as the SAFIRE grade increased, so did the proportion of patients with poor outcomes. At the 1-year follow-up, 18% (17/93) of grade I patients, 22% (20/92) of grade II patients, 32% (26/80) of grade III patients, 43% (38/88) of grade IV patients, and 75% (3/4) of grade V patients were found to have poor outcomes. At the 6-year follow-up, 29% (23/79) of grade I patients, 24% (21/89) of grade II patients, 38% (29/77) of grade III patients, 60% (50/84) of grade IV patients, and 100% (4/4) of grade V patients were found to have poor outcomes. Univariate analysis showed that a SAFIRE grade of IV or V was associated with a significantly increased risk of a poor outcome at both the 1-year (OR 2.5, 95% CI 1.5–4.2; p < 0.001) and 6-year (OR 3.7, 95% CI 2.2–6.2; p < 0.001) follow-ups.

CONCLUSIONS

High SAFIRE grades are associated with an increased risk of a poor recovery at late follow-up.
Radiologic prognostic factors of curve progression in early degenerative lumbar scoliosis
Authors: Park Jin-Sung , Park Se-Jun , Lee Chong-Suh , Yum Tae-hoon , Kim Bo-Taek
Published: January 2021

OBJECTIVE

Several radiological parameters related to the aging spine have been reported as progression factors of early degenerative lumbar scoliosis (DLS). However, it has not been determined which factors are the most important. In this study the authors aimed to determine the risk factors associated with curve progression in early DLS.

METHODS

Fifty-one patients with early DLS and Cobb angles of 5°–15° were investigated. In total, 7 men and 44 women (mean age 61.6 years) were observed for a mean period of 13.7 years. The subjects were divided into two groups according to Cobb angle progression (≥ 15° or < 15°) at the final follow-up, and radiological parameters were compared. The direction of scoliosis, apical vertebral level and rotational grade, lateral subluxation, disc space difference, osteophyte difference, upper and lower disc wedging angles, and relationship between the intercrest line and L5 vertebra were evaluated.

RESULTS

During the follow-up period, the mean curve progression increased from 8.8° ± 3.2° to 19.4° ± 8.9°. The Cobb angle had progressed by ≥ 15° in 17 patients (33.3%) at the final follow-up. In these patients the mean Cobb angle increased from 9.4° ± 3.4° to 28.8° ± 7.5°, and in the 34 remaining patients it increased from 8.5° ± 3.1° to 14.7° ± 4.8°. The baseline lateral subluxation, disc space difference, and upper and lower disc wedging angles significantly differed between the groups. In multivariate logistic regression analysis, only the upper and lower disc wedging angles were significantly correlated with curve progression (OR 1.55, p = 0.035, and OR 1.89, p = 0.004, respectively).

CONCLUSIONS

Asymmetrical degenerative change in the lower apical vertebral disc, which leads to upper and lower disc wedging angles, is the most substantial factor in predicting early DLS progression.