Vestnik SibADI最新文献

{"title":"Concrete as a factor in reinforced concrete buildings collapse in Burundi","authors":"E. Mikerego, J. Ndikumana","doi":"10.26518/2071-7296-2022-19-2-300-306","DOIUrl":"https://doi.org/10.26518/2071-7296-2022-19-2-300-306","url":null,"abstract":"Introduction. This paper presents the results of the assessment in-situ of the involvement of the concrete in the collapse of reinforced concrete buildings in Burundi.Materials and Methods. The study consisted in the identification of the compressive strengths of the concrete structural elements of the reinforced concrete buildings under study. The compressive strengths were identified on the columns, beams and slabs using an industrial SCHMIDT 2000 sclerometer according to the protocol described in NF EN 12504-2(2003). Seventeen (17) three-storey buildings under construction were studied. For each building involved in the study, the reinforced concrete bearing elements of the first floor were studied. The results obtained were classified according to the cement grades (32.5) and (42.5) that were used in the studied buildings. A comparison of the compressive strengths obtained in-situ was established in relation to the normative values according to the cement grade used. The reliability of the obtained results was confirmed by the correlation between the results obtained in the laboratory conditions on the reinforced concrete experimental samples.Results. This study showed that in Burundi up to 100% of collapses are caused by privately built structures. It was proved that the compressive strengths of 100% of the columns, 82% of the beams and 82% of the slabs that were made with a low-grade cement (32.5) had compressive strengths lower than the normative value (25MPa). In addition, the compressive strengths of 50% of the columns, 50% of the beams and 84% of the slabs made with a high-grade cement (42.5) were also proved to have compressive strengths lower than the normative values (35MPa).Discussion and conclusion. In this study, the reliability of the results obtained by sclerometer test in-situ on the reinforced concrete buildings has been proved. Concrete has been shown to be a factor in the collapse of privately built reinforced concrete buildings in Burundi. Low-grade cement was observed to have a high impact in the collapse of reinforced concrete structures than the high-grade one. Therefore, as a recommendation, the process of building reinforced concrete buildings in Burundi needs to be regulated and controlled.","PeriodicalId":32892,"journal":{"name":"Vestnik SibADI","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-05-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49408203","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Digital technologies for oversize goods road transportation","authors":"O. Y. Smirnova, Yu. A. Ertman","doi":"10.26518/2071-7296-2022-19-2-236-245","DOIUrl":"https://doi.org/10.26518/2071-7296-2022-19-2-236-245","url":null,"abstract":"Introduction. The scheduling a transportation route of overweight and oversize goods by road is necessary to perform taken into account road traffic safety and security of artificial engineering structures (bridges, railway crossing and others). The monitoring and control of these procedures are performed by a licensing system in Russia. During the delivery a driver must carry out the transportation of such cargo within the approved route that is specified in a particular paper (authorization) located in the vehicle. Issues appear mostly during first shipment organization and when the route is outside the permanent vehicles location, when road network and bypass schemes are not familiar for the driver and the current GPS-systems bases do not include formal designations of roads according to state register. The authors suppose digital technologies implementation has to facilitate easier abnormal load shipments violations-free sufficiently.The Materials and methods. A transportation organisation model of abnormal loads by BPMN notation has been developed. The key control points have been determined by the authors on the base of their own experience.The results. An information model of forming and transmitting to the carrier authorization to transport abnormal load within the approved route has been developed. In the authorization the link to the cartographic resource is inserted in one of the QR-code field. Such approach makes possible to identify approved route clearly and unambiguously.Uniqueness and practical meaning. The information model uniqueness consists of the transmission way of approves route to the customer – not the sequence of transit localities, but the cartographic resource. The practical implementation of such decision is addressed to help a carrier (a driver) to perform the abnormal load transportation strictly within the approved route.","PeriodicalId":32892,"journal":{"name":"Vestnik SibADI","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-05-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42928261","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Determination of pedestrian accessibility for urban public transport stops","authors":"S. S. Voitenkov, M. Banket","doi":"10.26518/2071-7296-2022-19-2-198-215","DOIUrl":"https://doi.org/10.26518/2071-7296-2022-19-2-198-215","url":null,"abstract":"Introduction. This article is devoted to the problem of determining the territorial (pedestrian) accessibility of stopping points in large cities, which is one of the indicators of the quality of transport services for the population.The aim of the study is to develop a methodology for determining the territorial (pedestrian) accessibility of stopping points of a large city with a thousand or more stopping points, based on publicly available data. The cause of the study was the dificulty of solving this problem, due to the large number of both stopping points and residential facilities, the straightforwardness of the shortest pedestrian approach, the lack of detailed instructions for performing calculations, etc. Based on the review of Russian and foreign scientific sources, approaches to determining the territorial accessibility of stopping points were considered, taking into account various additional parameters, such as the number of routes passing through a stopping point, the intensity of passenger exchange, the availability of socially significant objects, etc. The existing difficulties and peculiarities in determining the availability of stopping points for individual and multi-apartment residential buildings are given. In the framework of the System-wide measures for the development of road facilities federal project and the Safe and high-quality roads national project when preparing an application for the purchase of passenger transport rolling stock for Omsk, the authors carried out scientific and practical work, as a result, a methodology has been developed to overcome some difficulties in determining the transport accessibility of stopping points in a large city by using a partially automated approach at its individual stages.Materials and methods. In particular, tools such as Yandex Map Designer, Table Excel Editor, Xtools Add-in for Excel, QGIS program, Macro in Excel using JavaScript API and HTTP geocoder were used.Results. The calculation of territorial accessibility of stopping points using the developed methodology was carried out for Omsk. The application of this technique allows to reduce labour intensity of calculations up to 10 times. Discussion. The discussion of the results presented guidelines for further improvement of the developed methodology","PeriodicalId":32892,"journal":{"name":"Vestnik SibADI","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45120333","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Systematic assessment road network impact on atmosphere of urbanized area","authors":"E. Bondarenko, A. A. Filippov, I. Suleymanov, Sh. M. Minatullayev","doi":"10.26518/2071-7296-2022-19-2-184-197","DOIUrl":"https://doi.org/10.26518/2071-7296-2022-19-2-184-197","url":null,"abstract":"Introduction. To study the urbanized territory as a system, an approach was used that allows assessing gaseous and dispersed atmospheric pollution using a unified scale of environmental hazard. The features of air pollution in urban areas were considered, where a significant number of stationary and mobile sources of negative environmental impact are concentrated in limited overpopulated areas.The purpose of the study. the use of theoretical foundations for a systematic assessment of the level of environmental hazard of an urbanized area under the influence of the road network due to a combination of gaseous and dispersed atmospheric pollution.Methods and materials. Based on the improved model of the Urbanized Territory system, the following hypothesis is proposed: 1) motor traffic flows are both independent sources of formation of dispersed particles and sources of uplifting and spreading of particles, which in the presence of gaseous pollutants increases the level of environmental hazard of atmospheric pollution in an urbanized area; 2) atmospheric pollution of an urbanized area is formed when gaseous pollutants and dispersed particles from the street and road network are superimposed on the polluting background of other elements of the Urbanized territory system.Results. The distribution maps of the calculated complex index of atmospheric pollution were obtained for the most problematic areas of the urbanized territory of Naberezhnye Chelny - Prospekt Mira and Kazansky Prospekt. The obtained results characterize the change in the level of environmental hazard of urbanized areas when gaseous pollutants and dispersed particles from the street and road network are superimposed on the polluting background of other elements of the Urbanized territory system.Discussion and conclusion. Based on the generalization and comparison of the results of previous and current studies of the authors, comparing them with the results of other researchers, the hypothesis was fully confirmed. Conclusion. With the confirmation of the hypothesis, the goal of the study was achieved, which has scientific novelty and practical significance for the arrangement of a favorable and comfortable urban environment.","PeriodicalId":32892,"journal":{"name":"Vestnik SibADI","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45726510","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Waybill functionality in transportation management system","authors":"V. Kurganov, A. Dorofeev, M. V. Griaznov","doi":"10.26518/2071-7296-2022-19-2-216-223","DOIUrl":"https://doi.org/10.26518/2071-7296-2022-19-2-216-223","url":null,"abstract":"Introduction. In the conditions of digitalization of the economy, the use of electronic document management in transport activities is of practical importance. Regulatory acts have established that the package of accompanying goods and transport documents for road transport includes the waybill of the car. In this regard, it is important to study the possibilities of an electronic waybill in the digital management system of a motor transport enterprise to increase the efficiency of its activities.Materials and methods. The research uses methods of analysis and synthesis, digital modeling, methods of comparison and analysis of statistical data.Results. Based on the system analysis of normative acts, the characteristic of the legal status of the waybill is given. A generalized scheme of information flows in the digital model of a motor transport enterprise has been formed, in which the waybill occupies a central place. The implementation of the Process Mining procedure in the information management system of a motor transport enterprise, created using the digital twins concept, made it possible to obtain quantitative characteristics of operations with waybills performed by the staff.Discussion and conclusion. The results obtained have scientific novelty and are of practical interest for enterprises that own motor vehicles and carry out cargo transportation both for their own needs and on orders.","PeriodicalId":32892,"journal":{"name":"Vestnik SibADI","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43587690","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Experimental and analytical justification of the asphalt concrete cutting process by road milling machines working equipment","authors":"D. Furmanov, N. E. Lysakov, L. М. Shamakhov","doi":"10.26518/2071-7296-2022-19-2-170-182","DOIUrl":"https://doi.org/10.26518/2071-7296-2022-19-2-170-182","url":null,"abstract":"Introduction. The article is devoted to the results of a study of the cutting resistance of road asphalt concrete in the process of removing worn coatings by the working bodies of milling machines. The relevance of the work is due to the emergence of new grades of asphalt concrete and new types of cutting elements, for which it is difficult to predict the loads on the working body when solving the problems of designing new and justifying the operating modes of existing machines.Purpose. To calculate the parameters of the working body of the road milling machine.Materials and methods. The experimental work was carried out by determining the horizontal and vertical components of the resistance force of cutting asphalt concrete. The research was carried out on a mechanical stand with a movable plate, using recording equipment. Four different grades of asphalt concrete were destroyed. A twofactor experiment was conducted for each brand of material. The horizontal and vertical components of the cutting resistance forces were determined depending on the chip cross-sectional area, the grade of asphalt concrete and the type of cutting element.Results. As a result of the experiment, data were obtained that make it possible to reasonably determine the loads on the working body of the road milling machine. It is proved that the dependence of the cutting resistance forces on the chip cross-sectional area of the cutting element has a nonlinear character. The data obtained allow to comprehensively answer questions concerning the justification of the parameters of road milling machines.Discussion and conclusion. The obtained data allow to develop a mathematical model of the asphalt concrete milling process which will make possible to determine not only the loads on the working body and the energy intensity of the process, but also to reasonably approach the placement of cutting elements on the drum, determine the rational range of equipment operating modes and solve the problems of choosing operating modes depending on the type of asphalt concrete.","PeriodicalId":32892,"journal":{"name":"Vestnik SibADI","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-05-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48386954","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Quasi-zero rigidity condition for static force characteristic of parallelogram mechanism for seat vibration protection system","authors":"M. Korytov, I. Kashapova, V. Shcherbakov","doi":"10.26518/2071-7296-2022-19-2-144-155","DOIUrl":"https://doi.org/10.26518/2071-7296-2022-19-2-144-155","url":null,"abstract":"Introduction. Reducing vibration effects on machine operators is an urgent task; it allows to minimize the impact of vibrations on health, increase efficiency and attention. Accuracy and productivity can be improved. The problem of vibration protection is relevant for all types of machines, the working bodies of which interact with the soil and road surface. One of the impact reduction directions, along with vibration protection of cabs, is the development of vibration protection systems for operator seats. It is promising to use the effect of quasi-zero rigidity, which makes it possible to effectively damp low-frequency oscillations. For the proposed design based on a parallelogram mechanism, it is necessary to determine the condition for the horizontalness of the middle section of the static power characteristic.Materials and Methods. For the developed design scheme, using well-known power static and geometric relationships, novel analytical relationships between the parameters of the initial data and the vertical lifting force of the mechanism were derived. The initial parameters include the linear dimensions of the mechanism, the size of the quasi-zero rigidity zone, the weight of the chair with the operator, and the spring stiffness. When deriving analytical dependencies, the coordinates of the points of the mechanism moving and stationary relative to their own base were used.Results. The use of the developed analytical dependencies allows, for the given parameters of the initial data, to build a static power characteristic of the mechanism. The middle section of the characteristic is close to horizontal, but in general it is not horizontal. As an example, a static characteristic is given for a set of initial data values, the middle part of which is not horizontal. Equating the values of the vertical force of the mechanism at the left and right boundary points of the middle part of the characteristic made it possible to determine analytical dependences for ensuring quasi-zero rigidity.Discussion and conclusions. The obtained analytical expressions for ensuring the horizontalness of the middle section of the static power characteristic were verified. Applying the derived conditions decreases the number of parameters in the original data by one. An increase in the two dimensional parameters of the mechanism significantly reduces the required rigidity of the mechanism spring, which reduces the metal consumption.","PeriodicalId":32892,"journal":{"name":"Vestnik SibADI","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-05-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44204024","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Pure pursuit method use to control unmanned motor grader","authors":"R. Sukharev","doi":"10.26518/2071-7296-2022-19-2-156-169","DOIUrl":"https://doi.org/10.26518/2071-7296-2022-19-2-156-169","url":null,"abstract":"Introduction. A relevant objective of implementing the advanced systems of self-driving road construction vehicles can be accomplished by mathematical modelling. One of the important issues when creating a motion control system for a self-driving vehicle is to develop a trajectory following algorithm. The most well-known method of following the trajectory is a pure pursuit method, which is successfully used to control the movement of mobile robots.Materials and methods. Hence, the research objective has been defined and is to adapt the pure pursuit method to control an autonomous grader. To achieve the research objective, the task of a mathematical model of the motor grader movement with front steering wheels has been developed, and a mathematical model of the motor grader motion control system has been compiled. Besides, we propose an integral criterion to evaluate the efficiency of the motion control system of a unmanned grader. Some theoretical studies of the mathematical model have been carried out and the dependencies of the integral criterion on the design and operational parameters of the grader, as well as on the parameter of the control method (visibility range) have been obtained. Moreover, the optimal values of the visibility range for various values of the base length, base coefficient and machine speed have been defined according to the proposed efficiency criterion.Results. As a result of approximating the obtained optimal values, the pure pursuit method has been modified to control a self-driving motor grader, taking into account its design features and travel speed. The results obtained can be used to create the prototypes of unmanned control systems for road construction vehicles.","PeriodicalId":32892,"journal":{"name":"Vestnik SibADI","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-05-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43751435","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Classification of contaminants in diesel engine oils","authors":"S. V. Pashukevich","doi":"10.26518/2071-7296-2022-19-1-84-84-100","DOIUrl":"https://doi.org/10.26518/2071-7296-2022-19-1-84-84-100","url":null,"abstract":"Introduction. The deterioration of engine oil in an internal combustion engine (ICE) is directly related to the ingress of various pollutants into the crankcase. Depending on the type of contamination, the type of sediment on engine part surfaces varies. It should be noted that the functioning of the motor oil is extremely affected by the oxidation process, and organic acids produced during the process contribute to corrosion of ICE parts. Water, diesel, cooling fluid, soot particles, asphaltenes, etc. also cause irreparable damage.Materials and methods. This paper presents the results of an extensive literature review aimed at studying the main types of motor oil pollutants. Classifications are given for the aggregate state of pollutants, as well as for possible ways of their penetration into the lubricant. Liquid pollutants are the most narrowly considered in this article. To demonstrate the negative effect of contaminants entering the engine oil, photographs of internal combustion engine parts with sediments on the surfaces of the internal combustion engine components are presented.Results. The classification of the main pollutants of motor oils is given; the consequences arising from the ingress of foreign compounds into the lubricant in question are indicated.Conclusion. The effect of contaminants on the parts of the internal combustion engine and the lubricant has been established. On the basis of the classification, it is possible to judge the causes of entry and the possible consequences of the impact of contamination on the operation of the engine.","PeriodicalId":32892,"journal":{"name":"Vestnik SibADI","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43063696","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Water- and frost-resistance of crushed stone mastic asphalt concrete prepared on sevilen-modified bitumen","authors":"V. Yadykina, S. Navolokina, A. Gridchin","doi":"10.26518/2071-7296-2022-19-1-102-113","DOIUrl":"https://doi.org/10.26518/2071-7296-2022-19-1-102-113","url":null,"abstract":"Introduction. Currently, increasing the durability of road asphalt concrete pavements is one of the urgent issues, the solution of which provides a significant economic effect achieved by increasing the turnaround time, as well as the overall service life of highways. Asphalt concrete pavements with prolonged wetting due to weakening of structural bonds can be destroyed due to crumbling of mineral grains, which leads to increased wear of the pavement and the formation of potholes. Water penetrates into micro defects in the structure of asphalt concrete, leading to a decrease in the strength of the material. As a result, the corrosion resistance of asphalt concrete is reduced. To improve the quality of the binder and the durability of the asphalt concrete pavement, in particular from crushed stone-mastic asphalt concrete (SMA), various modifying additives, including polymer ones, are used. In this regard, a promising direction is the use of polymers containing active groups, which are able to provide an increase in adhesion to mineral materials, including those from acid rocks, and, consequently, water resistance. One of these is the ethylene vinyl acetate copolymer (EVAC).Materials and methods. In order to study the effect of sevilen on the water and frost resistance of asphalt concrete mixtures, crushed stone-mastic asphalt concrete mixtures were prepared based on bitumen modified with БНД 70/100 sevilen made in the Moscow Oil Refinery Plant was used as the initial bitumen in the preparation of modified binders. Tests of crushed stone-mastic asphalt concrete mixtures were carried out for the indicator of the content of air voids in accordance with GOST R 58406.8.2019, the coefficient of water resistance in accordance with GOST R 58401.18-2019 and frost resistance in accordance with GOST 12801-98.Results. It has been established that the content of air voids in asphalt concrete samples significantly decreases with an increase in the concentration of sevilene, which will further contribute to a higher frost resistance of the road surface. It is shown that the use of sevilen with 22% vinyl acetate makes it possible to increase the coefficient of water resistance of asphalt concrete mixtures due to the presence of polar molecules in the composition of ethylene vinyl acetate, actively interacting with the mineral components of the asphalt concrete mixture. The use of sevilen improves the frost resistance of asphalt concrete samples. So, the smallest decrease in strength in tests for frost resistance was shown by samples with 5% sevilene. It was found that polymer asphalt concrete based on binder with sevilene containing 22% vinyl acetate, which corresponds to the maximum basicity of the polymer, has the highest resistance to humidity and temperature effects of the environment.","PeriodicalId":32892,"journal":{"name":"Vestnik SibADI","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44149828","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}