bluuebunny/crossref_metadata_2025_split huggingface dataset:
Preservation of the heritage of historical environment through the example of the Vvedensky Cathedral of Orenburg
Authors: Klimova Y V 
Published: April 2020

Abstract
The article presents a collection, retrospective analysis and reconstruction of the Vvedensky Cathedral of Orenburg, located on the country’s border with Kazakhstan and serving as a for-post since its foundation in the middle of the 18th century. The author highlights the characteristic features of the constructed building, the differences between historical drawings and photographic data. As a result, a comparison was made between the reconstruction and the RONA NSO project, which served as the basis for the real restoration of the building in 2007-2010. The authors draw conclusions on the differences and similarities between the projects. Such analysis and comparison may become the basis for further reconstruction of the city buildings.
Wooden houses of Penza Town of the 19th - early 20th centuries and the problem of heritage preservation
Authors: Lapshina E G , Eshchin D V 
Published: April 2020

Abstract
The article presents the data on the influence of historical conditions on the formation of the architectural image of a wooden residential building. The problem of preserving wooden architecture as a historical and architectural heritage is considered. Material conservation is possible for the types of residential buildings that were built in the city of Penza in the first and second half of the 19th century. Wooden Art Nouveau houses built at the turn of the 19th and 20th centuries have been lost for today. The construction of their virtual models is proposed.
Use of augmented reality information and communication technologies in urban historical environment
Authors: Malysheva S G 
Published: April 2020

Abstract
In Samara, in the historical center of the city, the fragments of two wooden fortresses were found (the years of construction were: 1586 and 1706). The task is to find a way to demonstrate these architectural objects to a full extent against the background of the landscape of their historical location. The reconstruction of lost objects on the site where they were located is difficult because such areas are densely built up with newer houses. One of the solutions may be to use augmented reality technologies that allow combining, by means of superimposition, visual information (textual, graphic and three-dimensional), including the graphic reconstruction of the historical object, and the modern urban landscape as it looks.
Current state of Gagarin Park: its problems and the ways to improve the comfort of recreational environment
Authors: Shabanova A V , Orlov O G , Karpova V I 
Published: April 2020

Abstract
The state of recreational facilities and their accessibility for citizens is an integral part of life quality. Within the scope of work aimed at transition to comfortable urban environment, one of the most significant recreational facilities in Samara - Yuri Gagarin Park– has been examined. The following indicators have been researched and evaluated as the indicators of the park environment’s comfort
- the character of the established functional zoning has been described
- the zones of acoustic comfort have been defined
- the quality of water in water bodies has been evaluated
- the recreational load has been measured
- the expression of the recreational landscape has been evaluated.
The recommendations how to improve the comfort of the environment have been worked out, and they may be in demand while developing urban special-purpose programs.
Thermal insulation in pavement as a means of preserving or restoration the historical vertical layout of city streets
Authors: Simanovskii A M 
Published: April 2020

Abstract
The article is devoted to the problem of street reconstruction in areas with historically valuable buildings using the example of St. Petersburg. Saving the appearance of architectural monuments and street surface elevation points without reconstruction of underground utilities requires a reduction in the thickness of the road pavement. The solution to this contradiction is the use of insulating materials in pavement. The work is devoted to the theoretical study of road structures using thermal insulation made of polystyrene foam. Comparative thermotechnical calculations for traditional structures and structures with thermal insulation on various heaving soils have been performed. It is demonstrated that the use of traditional structures in the reconstruction of road structures leads to an increase in their thickness and frost depth. It is shown that the use of thermal insulation reduces the thickness of the pavement and completely prevents the freezing of soils under it. This allows saving and lowering elevation points of the road surface without reorganizing the underground utilities.
Architectural and urban planning features of the restoration of T S Khilinsky’s diocesan buildings lost in the 1930s
Authors: Zobova M G 
Published: April 2020

Abstract
In this article the author makes an attempt to identify architectural and urban planning features of the restoration of T S Khilinsky’s diocesan buildings completely or partially lost in the 1930s. This work is impossible without a comprehensive review, analysis and research of the master’s preserved architectural heritage. Some of T S Khilinsky’s diocesan buildings have been preserved nearly in an unchanged form to this day. Most of the objects have been reconstructed and restored. There are also completely or partially lost structures. It should be noted that the main task in restoring lost or ruined diocesan buildings is not only to make a reliable reproduction of the object according to the preserved project, taking into account the creative handwriting, stylistic features and techniques of the master, but also to supplement the lost meaning and significance of the object for history and culture as a whole. In the twenty-first century heritage restoration has become a truly global concern, as heritage is commercialized like never before and threatened like never before. This article questions whether the established theories of restoration are still relevant to an expanding remit and changing demands of building restoration in the global context of the twenty-first century.
Activities of city public administration in regulation of economy, construction and urban land improvement (Russian experience)
Authors: Zolotareva M V 
Published: April 2020

Abstract
The paper addresses activities of City Duma authorities under new conditions of restructuring the management of the urban economic and construction sector. In the course of those reforms, legislative materials serving as the basis for new principles of territorial, sectoral and local management were the most important at the time. The reforms of the second half of the 19th century not only changed the state policy of control over civil engineering but also ensured partial delegation of responsibilities for the economic and construction sector as well as urban land improvement to the urban community. Besides that practical work, the government initiated legislative activities at City Dumas. Despite the fact that the Building Code remained the main legislative document, mandatory regulations of urban communities served as its subordinate acts taking into account local specifics.
Investigation of the biologically-resistant organic pollution destruction process in wastewater by ozone
Authors: Alekseev S 
Published: April 2020

Abstract
During the development of technology of ozone usage for wastewater treatment from organic pollution, it is important to be able to determine the required dose of ozone and the duration of oxidation. Ozonation is used in combination with other methods of water treatment, so it is important to determine the stage at which ozonation is used. Ozone can be used for purification of urban wastewater for the destruction of surfactants and textile dyes. These substances are often biologically resistant and cannot be removed by biological treatment methods. Decomposition of organic matter of dyes and surfactants occurs not as quickly as decrease in color. In such cases, the purification process is usually controlled by indicators such as total organic carbon content, oxidation, COD, etc. It can be difficult to determine the dose of ozone, which is necessary for the destruction of pollution. We examined the material balance of the process of destruction of some contaminants and conducted experimental studies to verify it. The technique is proposed for calculating the required dose of ozone for the destruction of dyes and surfactants in wastewater with a small number of measurements. The method makes it possible to calculate the specific dose of ozone and necessary ozonation period for destruction of pollution in wastewater.
Trivalent chromium wastewater treatment
Authors: Bykovsky N A , Kantor E A , Rahman P A , Puchkova L N , Fanakova N N 
Published: April 2020

Abstract
This scientific paper deals with the study results for treatment of the wastewaters generated in the leather industry from trivalent chromium. Wastewater purification is realized by its treatment in a diaphragm electrolyzer. It is shown that during the electrolysis the increase in pH in the electrolyzer cathode chamber occurred. This leads to the precipitation of chromium hydroxide. The ratio of chromium extraction from the drain is determined by the amount of passed electricity and does not depend on the current load on the cell. The maximum ratio of chromium extraction from the effluent is achieved with a pass of 0.113 A⋅h/g and made 99.97%. A further increase in the amount of electricity passed through the cell leads to the increase in the chromium content in the waste water. The minimum energy consumption for the chromium extraction from the drain is observed at a current of 0.5 A and is equal to 4.38 kW⋅h/m3.
Computer simulation study of the vacuum effect during sewage pipelines annular space backfill in trenchless renovation
Authors: Hurgin R , Chudakov M 
Published: April 2020

Abstract
The article presents material that may be useful for designers and researchers involved in the pipeline material selection for the water supply and sanitary sewer networks construction and reconstruction. During renovation of a dilapidated pipeline by pulling a new polymer pipeline into it, the annular space is filled with cement mortar. The influence of vacuum effect on the strength characteristics of the pipeline when it is filled with cement mortar is considered. The influence of groundwater on the pipeline stability and vacuum in the annular space is presented.
Activity of fly ash as an indicator of their modifying ability
Authors: Markova I Yu , Bezrodnykh A A , Markov A Yu , Strokova V V , Stepanenko M A 
Published: April 2020

Abstract
The article shows the possibility of using fly ash as an active component of binders of various compositions used in the design of composites for road construction purposes. This study was conducted on the basis of the data on the distribution and concentration of acid-base centers on the surface, sorption capacity, specific surface area, and morphological features of dispersed particles of technogenic raw materials. The study substantiates the feasibility of using ashes as a modifying component of low-calcium composites for inorganic binders (cement) due to the high pozzolanic activity, high-calcium composites for organic binders (bitumen emulsions) due to “inertness” and surface smoothness.
Wastewater cleanup method reducing corrosion impact on pipelines and equipment of oil stabilization production
Authors: Balgynova A M , Ardak M K , Egorov A L , Arstanaliev E U , Medetov Sh M , Imangalieva G E , Abishev M N , Galieva L Kh , Mukambetkalieva R E , Tadgieva G B , Kalieva A D 
Published: April 2020

Abstract
The object of research in this article is the wastewater of oil stabilization production. Wastewater from oil refining and petrochemicals is highly toxic and poses a serious environmental hazard with existing wastewater volumes. The purification of these effluents to the parameters stipulated by the current regulatory requirements is practically impossible by traditional methods. In addition, in some cases, high contamination of water used in technological processes leads to significant economic losses, often irreversible. The low efficiency of wastewater treatment in the oil stabilization production negatively affects the reservoir pressure maintenance system for a number of reasons, one of which is an increased content of suspended solids that cause the formation to be calcified in the bottom-hole zone and lower well injectivity, which, in turn, leads to significant production losses oil. The actual service life of sewage pipelines containing hydrogen sulfide and oxygen does not exceed two years. The overhaul period of operation of pumps in the wastewater transport system is 0.2–0.3 years. The low efficiency of wastewater treatment is associated with the use of a morally obsolete system of treatment facilities, one of the significant drawbacks of which is the presence of open settling ponds. Lack of recycled water supply affects the costs associated with the use of fresh water. The volume of fresh water purchased for technological needs is estimated at thousands of cubic meters per day. At the enterprise under consideration, treatment facilities with a traditional technological scheme function. The authors of the article identified the reasons for the lack of effectiveness of these facilities and concluded that it is necessary to improve technologies and wastewater treatment schemes.
Surface wastewater purification from emulsified and dissolved organic pollutants with the city of Samara as an example
Authors: Sargsyan A M , Ilyin N A , Averyanov D A 
Published: April 2020

Abstract
This paper considers the impact of surface wastewater from residential areas and industrial enterprises, including enterprises of railway transport on ecological environment. It also describes the content of harmful substances of organic and inorganic origin in the surface runoff. The researchers consider practical methods of cleaning wastewater from oil-containing contaminants and put forward technological schemes of surface wastewater purification including its biological treatment.
Transformation and sustainable development of sanitary engineering systems in the cities of the future
Authors: Shuvalov M V 
Published: April 2020

Abstract
The transformation of the sanitary engineering systems is constant and closely connected with the development of urban development theory and practice. It is also influenced by scientific and technological progress in other areas of human activity. The initiators of the revival and further development of the movement to build cities-gardens in the near future are engineers working to create a model for the sustainable development of urban sanitary improvement. At the beginning of the twenty-first century, the paradigm shift in the field of city sewerage construction technologies is due to the resumption of the search for resource-saving technologies that reduce the emission of pollutants into the environment due to the introduction of promising technological solutions for the separation of household wastewater into separate streams for the purpose of production of secondary products from wastewater components. A list of the main research directions on the modified technologies development that will ensure the sustainable sanitary systems development in the cities in the future was proposed based on a generalization of conceptual solutions for the transformation of the sewerage systems of cities and settlements.
Kinetic and static parameters of a new sorbent based on clays and ways of its determination
Authors: Stepanov S V , Panfilova O N 
Published: April 2020

Abstract
The paper demonstrates experimental research results obtained while studying heavy metal ions sorption ability. These ions were extracted from a multicomponent model solution. The research was conducted for a new sorption sample based on clays under static conditions and carried out in the range of low concentrations of heavy metal ions in the solution. For the development of sorption isotherms, the method of non-variant test portions and variable concentrations of heavy metal ions was used. As a result, the researchers constructed sorption isotherms for copper, zinc, manganese, iron and lead. The experimental data was approximated by the Freundlich, Langmuir, Langmuir-Freundlich, Toch and Redlich-Peterson equations. MathCAD and SciDAVis software programs were used for mathematical processing. The authors came to the conclusion that the Langmuir equation most adequately described the sorption isotherms for copper, lead and zinc, the Toch model was preferable for iron and manganese isotherms. During the experiment, sorption constants and determination coefficient were also determined for each metal.
Problems of defining sanitary protection zones for existing water supply and water disposal enterprises
Authors: Strelkov A K , Gorshkalev P A , Chernosvitov M D 
Published: April 2020

Abstract
The paper considers the first codification of enterprises according to hazard classes and the development of a classification showing the negative impact of enterprises on people. To protect people from production facilities negative impact sanitary protection zones (SPZ) are established for such enterprises. This paper describes how approaches to hazard classes of enterprises have changed over time. The procedure for establishing sanitary protection zones which is in force today is also described. This procedure can be applied to the establishment of the size of a sanitary protection zone for all types of enterprises, including water supply and wastewater disposal facilities. The researchers further examine issues arising from the establishment of sanitary protection zones of existing enterprises and objects of water supply and wastewater disposal located in historical building developments, concentrating on those locations where reconstruction or modernization is planned. it is specially stressed that reconstruction of sewage waste-disposal plants often causes considerable difficulties as the formal expert examination requires to provide a layout of an officially approved sanitary protection zone which is not possible in most cases because there are houses already located within the regulatory zone of these plants.
Using pipes from various materials for sewage network: theoretical analysis
Authors: Tarakanov D I 
Published: April 2020

Abstract
The paper presents the analysis of data on Russian settlements sewage networks as of 2014-2018, published in the public domain. All the settlements are divided into six groups depending on the population size. For each group, the distribution of sewage networks depending on the material of the pipes is established. In this country, the most widespread pipes are ceramic and cast-iron pipes, which have been widely used in the last 100 years. Asbestos-cement, reinforced concrete and steel pipes were used much less frequently. Active construction of sewage networks from plastic pipes began only in the last 20 years, so their share in the total volume does not exceed 6%. The authors believe that there will be a significant increase in the number of plastic pipes in the total length of sewage networks in the next few years.
Development of high-efficiency equipment for wastewater treatment from difficult-to-oxidize organic compounds and suspended solids
Authors: Tarasov A S , Wasiliew A L 
Published: April 2020

Abstract
The most important problem in the modern developing world - is the problem of industrial wastewater treatment, while there is a need to create a simple to manufacture, efficient, simple and reliable in operation treatment equipment to prevent the ingress of chemical pollutants into water bodies. The main task in the design and development of new equipment for industrial sewage treatment plants is to obtain technically feasible, environmentally efficient equipment for wastewater treatment of textile industries, which will meet the requirements of environmental regulations of the legislation of Russia. A great danger to the aquatic microflora are hard-oxidized organic compounds, residues of dyes, Synthetic surfactants, acids, alkalis are widely used in the flax processing industry.
Discriminative model of pipeline accidents detection in water supply and distribution systems
Authors: Zayko V A , Chernosvitov M D , Poluyan V I 
Published: April 2020

Abstract
The paper deals with the problem of current assessment of emergency conditions and diagnostics of emergency pipelines location in water supply and distribution systems (WSDS) in conditions that allow maintaining the quality of water supply network functioning at a certain target level. The diagnostic process here consists of the following three stages: detection of the fact of the accident, assessment of the quality level of the system operation and search of the emergency area. To solve the problem, the researchers resort to the method of discriminative analysis. This method makes it possible to use information about the values of such controlled parameters as pressure at the network certain points and discharge in the network sections thus assessing if the technical condition under diagnosis belongs to one of the emergency subsets. The method also involves the decision procedure constructed in the multidimensional space of the observed indicators proving the emergency conditions.
Innovative methods of wastewater treatment
Authors: Zencov V N , Nikitina O G , Rayzer J S , Lapshakova I V , Ovchinnikova A S 
Published: April 2020

Abstract
The experience of usage of sewage treatment plants has shown that if we desist from the usage of primary settlements of domestic wastewater, we solve a problem with thickening, processing, transportation and placement of raw sludge. Of course, the grates for screening the waste and sand traps for removal of mineral pollutions from wastewater is still very important part of the treatment facilities. If we desist from the usage of primary settlements, we should pay great attention to the modernization and intensification of the work of sand traps and grates. Unlike with a raw sludge, waste from grates and sand mixture from sand traps can be easily recovered in an ordinary urban landfill with a solid household waste. The most part of Western countries stop to use primary sedimentation of municipal wastewater; the Russian Federation still employ this method. At the same time, the residual floc can be completely mineralized by active sludge.