bluuebunny/crossref_metadata_2025_split huggingface dataset:
The role of underground urbanization in Samara city geological processes
Authors: Vasilieva D , Maltsev A , Baranova M 
Published: February 2021

Abstract
In all largest cities due to lack of territory there is an intensification of underground space use - underground urbanization. It allows finding solutions to transport and environmental problems while preserving the unique appearance of the city’s historical cents. However, the process of underground space development leads to activation of some exogenous processes, which may lead to negative consequences. More than one million people live in Samara city, subway line is built, there are subway objects of industrial and defense importance (bunkers) reaching considerable depth. Active underground construction leads to strengthening of geological processes (weathering, karst formation, suffosia, etc.), change of strength properties of rocks, violation of natural hydrological regime of the territory. By the example of Samara, stages of underground urbanization of the city were studied and its influence on geological processes was considered. Results of studying existing use of city underground space are described. Taking into account geological and geomorphological regionalization of the city, the areas, which underground space development is the most undesirable, were identified.
Diagnostics data in the framework of railway tracks maintenance
Authors: Šestáková J , Pultznerová A 
Published: February 2021

Abstract
Determining the requirement and location and deciding on the time and sources of repair action is a difficult process, influenced by requirements on cost minimization and operational constraints. The particular sections of the railway track react differently to traffic and non-traffic loads, which implies the need to determine the format of development of structural quality indicators and decision-making is based on a large amount of technical and economic information, the interconnection of which is determined by the infrastructure manager. The decision-making process on repair work in the railway infrastructure management system is therefore based on the analysis of diagnostic data, technical, technological, environmental, and economic information, or the personal professional experience of the staff of the infrastructure manager. Understanding the causes of the structure’s behaviour in this process leads to the identification of its weaknesses and the ability to predict its behaviour, which allows for timely planning and accurate targeting of adequate repair work to minimize the occurrence of structural faults.
The cost of repairing damage caused by the inadequate demolition of walls in a multi-family building
Authors: Sawicki M , Szóstak M 
Published: February 2021

Abstract
The article analyses the cost aspects related to the inappropriate demolition of interior walls in a multi-family building in Wroclaw. As a result of demolition and dismantle works on the ground floor of a multi-family building, which was erected using traditional masonry technology, the structural elements on the upper floors were damaged. The expertise report and performed tests confirmed the cause of damage, and the condition of the structure, resulting from the conducted works, was analysed. Recommendations for repairing the structure, and an analysis of the costs associated with the repair were also specified.
New flame-retardant composition for lowering contribution of expanded poly styrene to the propagation of fire
Authors: Mochalov A M , Akulova M V , Sokolova J A , Sokolova A G 
Published: February 2021

Abstract
Despite the major advances in ensuring fire safety of buildings and structures, fire risks still represent the serious issue not only on the territory of the Russian Federation but on the global basis. Presently, while erecting buildings and structures focused attention is given to lowering material consumption and reducing construction time. This is achieved by means of application of lightweight building envelopes with efficient insulators. For the most part, foam poly styrene plates are used as an insulator. Expanded or foam poly styrene has low coefficient of heat conductivity, high acoustic isolation, long-term durability, moisture resistance, and is characterized by ease of installation. However, application of foam poly styrene has constrains due to its high contribution to the propagation of fire.
In the present paper, the authors proposed new flame-retardant composition on the base of organo-siloxanes, which inhibits combustion initiating of foam poly styrene and constrains fire propagation when applied on the surface of foam poly styrene plates.
Technical condition of apartment buildings in the central regions of Russia
Authors: Balzannikov M I 
Published: February 2021

Abstract
The article notes the presence in Russian cities housing stock of the central regions of a large number of residential apartment buildings, built over 50 years ago and in operation. The bearing capacity of the structures of these houses has significantly decreased. In connection with this carried out a survey of technical condition of houses. For buildings that are for further operation invalid state, the procedure of recognition of their emergency. Analysis of data on the technical condition of apartment buildings showed that in the cities of Kazan, Samara and Volgograd, the physical deterioration of residential buildings is 25-28%, which is less than the average value in Russia, and in Nizhny Novgorod it is significantly higher and amounts to 38%. The data allow us to conclude that in the near future in Nizhny Novgorod one should expect a large number of residential buildings to go into emergency condition. Analysis of indicators of the state of emergency residential buildings in these cities shows that the percentage of the city of Samara operated homes, referred in 2013 to the state of emergency, the largest and is 10.1%, which is significantly higher than the average value in Russia. As one of the main reasons for the incomplete resettlement of emergency houses under the program for the period 2013-2018 indicates “the unknown whereabouts of the owner.” The article concludes that it is possible to increase the efficiency of the resettlement program through operational work with the owners of residential premises of liquidated residential buildings.
Feasibility analysis for revitalisation of unused rail infrastructure
Authors: Sitányiová D , Masarovičová S 
Published: February 2021

Abstract
Abandoned railway stations were constructed to serve as a railway stations but have fallen into disuse, because of different circumstances. Many rural stations and lines were closed with the introduction of new bus services, and also due to increased popularity of cars. Some of them were converted and now they have new functions. The purpose of this article is to introduce the concept of reinvention of rural stations in YOUMOBIL project with emphasis on feasibility of reinvention projects. Article gives an overview how is a typical feasibility study organised. Other parts of this document explain the specifics of YOUMOBIL feasibility studies, good practice of reinvention of disused railway infrastructure and example of YOUMOBIL reinvention pilot project in Brezno. YOUMOBIL makes a valuable contribution, helping rural communities get the most from their abandoned stations, turning stations and their surroundings into welcoming, thriving, and safe gateways and hubs. Working with the rail industry towards improvements, such as better pedestrian and cyclist access, supporting intermodality, running events, workshops or other activities encourages people to use public transport, and support the local community.
Requirements for engineering protection of structures and territories for the safe investment project implementation
Authors: Zhuravlev P A , Marukyan A M 
Published: February 2021

Abstract
The article is devoted to the problems of engineering protection of buildings, structures and territories, when organizing territory, formalising principles (conditions), in accordance with which management and construction solutions for engineering protection arrangement are admitted at the planning and design stages. An integrated approach to the engineering protection arrangement is formulated on the basis of these principles (conditions). The approach requires preparation of an engineering protection project, including general layouts, detailed and specified plans, to develop various project solutions, optimize the design process, assess the prevented damage, justify the investment and estimate the consolidated approximate cost.
Principles of construction technical expertise (expert examination) informatization
Authors: Lazareva N V , Zinoviev A Y , Kochenkova E M 
Published: February 2021

Abstract
The article is devoted to principles of informatization of construction technical expertise (forensic, pre-trial and corporate ones). Information models of capital construction objects are considered in the article, in relation to the area of expertise they should include three components: standard (conceptual), basic (design), and real one. Modern information models, as a rule, include only the first two components, but it is the third component, that is crucial in the development of informatization of construction technical expertise. In this regard, the article defines the process of informatization of construction technical expertise and specifies its components: mediatization, computerization, intellectualization. Each informatization component has its own functionality, connected with its purpose, so the authors present their structuring and functional decomposition. The practical significance of the states, given in the article, is related to improving the efficiency and objectivity of construction technical expertise, as well as ensuring the quality of work, control of the cost and duration of contracts or services.
Economic substantiation of construction of narrow profile hydraulic-fill structures
Authors: Mikhasek A A , Rodionov M V , Mingafin R R 
Published: February 2021

Abstract
Hydraulic-fill structures with free flow of pulp have a flattened transverse profile, especially in cases of hydraulic fill of the structure into water. The flattened profile of the structure demands significant financial and labor costs for its construction, reducing the efficiency of the hydraulic-fill structure. This paper deals with the existing methods for the construction of narrow profile hydraulic-fill structures, their economic indicators; the designs of hydraulic-fill structures using geosynthetic materials developed by the authors, which make it possible to increase their efficiency in comparison with previously known methods, especially when the structures are hydraulically filled into water.
Influence of compaction on the deformation resistance of the sub-ballast layer
Authors: Dobeš P , Ižvolt L 
Published: February 2021

Abstract
In railway practice, the results of static load tests are used most frequently to check the quality of compaction. However, the static load tests are preferably carried out to demonstrate the achievement of the required deformation resistance on the sub-ballast layers. The paper deals with the analysis of measured values of deformation resistance of the sub-ballast layer on the modernised track Považská Teplá - Žilina, depending on the compaction (achieved degree of soil compaction) and the possibility of mutual correlation of these qualitative parameters. In the analysis, the values of deformation resistance and compaction quality (degree of soil compaction) were used as part of the quality diagnostics of the performed work on the part of the modernised section of the line Považská Teplá - Žilina.
Compressive Properties of BFRP and HFRP Bars
Authors: Protchenko K , Salha M , Urbański M , Narloch P 
Published: February 2021

Abstract
Durability of steel reinforced structures is one of the leading problems in construction field nowadays. Currently many studies are focused on the possibility of steel reinforcement replacement in concrete structures with a non-corrosive reinforcement, such as FRP (Fiber Reinforced Polymer) reinforcement. This paper presents and compare the results of compression testing of Basalt (BFRP) and a newly developed type of Hybrid FRP (HFRP) bars. The program examined 30 HFRP bars and 30 BFRP bars with a nominal diameter of 8mm and unbraced free-length varying from 50 to 220 mm. Compressive buckling load strength decreased as free length increased, and the modulus of elasticity under compression for diverse unbraced lengths bars slightly differed, but its value was similar to the modulus of elasticity at tensile. In addition, the test results showed that the ultimate compressive strength of non-buckled HFRP bars as a result of axial compression is about 46% of the ultimate strength. The relationships between the compressive buckling load strength and the unbraced length as well as the optimal unbraced length of the bars were determined. Current research is aiming to contribute the optimization of the transverse reinforcement design and the development of standard regulations in the area of elements with such compressed reinforcement.
Approaches to predicting the characteristics of fireproof materials
Authors: Eremina T , Korolchenko D , Portnov F 
Published: February 2021

Abstract
Planning an experiment is a new approach to research in which mathematical methods are given an active role. Based on the a priori information about the process under study, the researcher chooses some optimal research methodology. The results of the new approach to solving extreme problems depend to a large extent on the optimization of planning for a particular class of problems. The test plan presents a shortened plan of complete factor tests and can be considered acceptable due to the small correlation between affecting factors (AF) and output parameters (OP). The peculiarities of design of new composite materials to ensure safety in the operation of buildings and structures under conditions of man-caused and biogenic threats have been determined. The result of the article is the research using the method of forecasting the characteristics of fireproof materials.
Research of a new flame retardant material with set parameters of operational properties taking into account features of glued wooden structures
Authors: Korolchenko D , Rodionova L 
Published: February 2021

Abstract
The questions of peculiarities of using fireproof composition for glued wooden structures are considered. The results of testing the fire-protective efficiency of the composition, the influence on reducing the combustibility and flammability of wooden structures, compatibility with different glue components of glued wooden structures are given. The results of performance properties estimation are described.
Increasing the economic sustainability of winter road maintenance processes through the use of technological innovation
Authors: Sedivy S , Mikulová L , Florkova Z , Gaspar G 
Published: February 2021

Abstract
Effective road management requires the constant generation of new approaches. It is our duty to focus on improving all technical and process areas of road management, especially in the context of environmental and economic sustainability. Otherwise, we will face the fact that neglected parts will slow down the progress of the whole system. This will be reflected in a reduction in the quality of the infrastructure and increased costs over its life cycle. The approach must be systematic and therefore it is necessary to address the elements that, at first sight, do not have a major impact on other elements contained in the whole structure of road infrastructure management. One of the key areas for improvement is the process of winter road maintenance. It must reflect global climate change, new approaches to the cost-effectiveness of finances spent by users and road managers and, last but not least, the need for modern and safe mobility of goods and people. Advanced technologies such as automated anti-icing spraying systems or predictive monitoring of road structure temperature development are one example. However, these innovations bring not only positive but also negative effects.
Impact of environmental actions on steel structures
Authors: Jančula M , Vičan J , Spiewak A 
Published: February 2021

Abstract
The durability of steel constructions is strongly influenced by damage due to environmental actions, which need to be consider in design and maintenance of new and also existing structures. Corrosion aggressiveness of the atmospheric environment is classified by the corrosion rate, what it represents thickness losses of structural steel. That leads to a smaller resistant area, producing a decrease in the structural performance in terms of resistance, stiffness and ductility. The object of this contribution is to present a partial report of experimental research of corrosion processes influence on steel bridges in Slovakia and Poland.
Optimization of process parameters in Electric Discharge Machining Process of Ti-6Al-4V alloy using hybrid Taguchi based MOORA method
Authors: Srikanth R , Singaravel B , Vinod P , Aravind S , Subodh D 
Published: February 2021

Abstract
Electric Discharge Machining (EDM) process is used where the materials are difficult to machine by conventional methods. Titanium alloy is extensively used in aerospace industries because of its light weight and strength. This titanium alloy can be grouped into hard to cut materials and EDM is preferred for machining. In this work, an attempt is made by machinability analysis of titanium alloy on EDM using non-treated, cryogenically treated and tempered conditioned copper electrodes. The input parameters chosen are current, pulse on time, pulse off time and electrodes with different conditions. The output parameters are investigated include Material Removal Rate (MRR) and Tool Wear Rate (TWR). Taguchi based Multi Objective Optimization Ratio Analysis (MOORA) is used to find value of optimum input and output parameters. The result showed that cryogenically treated with tempered copper electrodes are good in machining performance and proposed Taguchi bases MOORA method has capable of solving multiple objectives simultaneously.
Process performance evaluation in mechanical engineering industries in accordance with ISO 9001
Authors: Naveen Karri , Senanayake Rohan , Selvan Chithirai Pon 
Published: February 2021

Abstract
ISO 9001 standard provides a framework for monitoring, measurement, analysis and evaluation; which is an essence of the quality management system and the prime interest for stakeholders. The annual survey conducted by ISO indicate that majority of ISO 9001 Certificates were issued to “Basic Metal & Fabricated Products” industry. Not much research is carried out from the dimension of management system auditor; where evidence based approach is adopted to determine the conformance against the requirement of ISO 9001. This research study is the outcome of the audit conducted in 385 mechanical engineering companies across ten countries. Five hundred mandays of onsite audit yielded the primary data; gathered by means of Interviewing, Observation and by verifying documented information. This research started with the review of performance evaluation requirements, leading to structured audit in accordance with ISO 19001. An independent and impartial audit was conducted to determine the conformance to ISO 9001. Research data is analyzed by using Jamovi software to understand the degree of conformity to the requirements of performance evaluation.
Investigation of powder mixed electrical discharge machining and process parameters optimization using Taguchi based overall evaluation criteria
Authors: Ashok M- , Niranjan T. , Chokalingam S. , Singaravel B. 
Published: February 2021

Abstract
Electrical Discharge Machining is a type of nontraditional process can be used for machining of hard materials and making of complicated shape.In EDM, the important parameters are tool, workpiece and dielectric liquid. Dielectric liquid is used to enhance ionization during the process. Powder Mixed EDM (PMEDM) is preferred for enhance the process efficiency. In this work, nano alumina (Al2O3) powder is added to the dielectric liquid and the process parameters effects are investigated. Input parameters considered are pulse on time, pulse off time and current. Output parameters considered are rate of material removal, surface quality and wear in electrode. Nano powders are mixed in the ratio of 2% to the EDM oil during the operation with dielectric fluid weight ratio. Process parameters are optimized using Taguchi based Overall Evaluation Criteria (OEC). The result revealed thatPMEDM is enhanced the process efficiency.
Mechanical properties of natural fiber reinforced polylactide composites: A review
Authors: kumar Santosh , Shamprasad M S , Varadarajan Y S 
Published: February 2021

Abstract
Nowadays, there is an augmented concern for the development of not only well-designed but also fully sustainable materials. The extraction of renewable resources and disposal processes that would not harm our eco-system is associated with material sustainability. In this respect, biodegradable polymers and natural fibers are suitable alternatives to many non-degradable composites which one lightweight. Many researchers are trying to fabricate composites by adding these two through various means and characterizing their mechanical properties to find the suitability of these for different applications. The present article reviews the literature on the fabrication of polylactide composite reinforced with natural fibers, both of which are biodegradable fully; further, the article reviews the methods used by the researcher for characterizing mechanical properties of these composites.
A Comparative Analysis of Biodiesel Properties Derived from Meat Stall Wastes through Optimized Parameters
Authors: Ravikumar R , Kiran K , Harish Kumar M , Hebbar Gurumoorthy S , Divakara Shetty A S 
Published: February 2021

Abstract
Biodiesel is considered as alternative green fuels that can be used in Internal Combustion engines as a replacement fuel for conventional diesel. Biodiesel is extracted from vegetable and animal sources which are rich in triglycerides. In this work, an attempt has been made to obtain and characterize the biodiesel from animal wastes such as chicken skin and pig tallow which are available in abundance and at an economical cost within the authors’ geographical location. Initially, the feedstock is decontaminated and subjected to conventional heating to convert it into fatty oil. Heating is carried out at different temperatures and for varying time to find out the optimal combination of time and temperature, which would result in maximum fat yield. The fatty oil is then subjected to the trans-esterification process with methyl alcohol in the presence of a catalyst to extract crude biodiesel. A de-canter funnel is used to separate the glycerine and biodiesel from the crude extract. The extracted biodiesel is mixed in different volume percentages with conventional diesel, and various thermochemical properties were evaluated as per ASTM standards. The test result indicated that the properties of the biodiesel blends were well within the limits as prescribed by ASTM standards.