bluuebunny/crossref_metadata_2025_split huggingface dataset:
Solutions for Structural Planning of the Urban Green Corridor for Hanoi City
Authors: Tuyen Nguyen Van 
Published: March 2021

Abstract
Hanoi is the capital of the Socialist Republic of Viet Nam. It is also the political, economic and cultural center of the Red River Delta area and Viet Nam. Hanoi City is the first large urban center in Vietnam to adopt the Green Corridor model as part of the master plan approved in 2011, which is somewhat similar to the green belt model widely adopted in urban areas in the world. The green corridor for Hanoi includes “rural areas, systems of rivers, lakes, hills, natural forests, farming areas … strictly protected to provide logistics support for urban development, landscape protection and healthy urban environment”. The green corridor for Hanoi includes the entire suburban areas, which play a role in controlling the sprawling development of the central urban hub and occupy nearly 70% of the city’s land area. This solution also causes a lot of controversy on how the concept should be interpreted as the structural planning does not reflect natural conditions and there remain difficulties in the management of such a plan in practice. Using field surveys, graphic presentation and literature review, the article identified existing problems in development of a Green Corridor plan for Hanoi. Based on these problems, the article presented the concept, planning structural model and some solutions for management of the urban green corridor for Hanoi.
Adesione Additives for the Production of Asphalt Concrete with the Use of Waste in Building Ceramics
Authors: Yatsenko N D , Evforitsky A S , Kotenko N P , Popova L D 
Published: March 2021

Abstract
The possibility of using industrial waste is theoretically justified porcelain stoneware as an asphalt concrete filler. The influence of adhesive additives for bitumen bond BND (oil road bitumen) 60/90 with porcelain stoneware of various fractional composition has been established.
Research of the Purification Methods of Chrome-Containing Manufacturing Water
Authors: Porshina E G , Saimanova O G , Serpukhova E P 
Published: March 2021

Abstract
The article describes the most common current methods for treating industrial wastewater containing chromium compounds. Possible methods of recycling chromium-containing waste and difficulties associated with this process are identified, as well as increasing factors are noted. Concepts of electrocoagulation and reagent methods are presented, their advantages and disadvantages are noted. A process scheme for treatment of contaminated effluents of industrial enterprises is proposed, which provides for their release into the city drainage network. An example of a successful existing technology for recycling chromium-containing waste water is given. The most effective integrated method of treating industrial effluents is justified for industrial enterprises that have chromium-containing wastewater. It provides for the combination of the electrocoagulation method with the post-treatment of wastewater by the reagent method. As reagents, it was proposed to use barium chloride 2-aqueous and iron sulphate (II) 7-aqueous (iron sulfate). Comparative calculation of the required amount of reagents and its cost was made.
Properties of Concrete Modified by Ultrafine Cement Admixture
Authors: Egorov E S , Samchenko A V , Abramov M A 
Published: March 2021

Abstract
This article describes possibility using hydrated cement as additions for batching new concrete. Time of cement hydration was 2, 4 and 6 hours. Quantity of pre-hydrated cement for batching admixture was equal 5, 10, 15, 30% dry matter content in relation to cement for control mixture. Influence of addition on normal consistency, concrete unit weight and compression resistance was determined. Cement particles distributions of control and pre-hydrated specimens was studied. The article shown need for increasing water quantity to getting normal consistency which led to decreasing unit weight. As a result of adding hydrated cement particles an early strength increased with amount of admixture less than 10%. Received results were discussed according to cement hydrations mechanism.
Building Information Modeling for Sustainable Construction
Authors: Bukunova O , Bukunov A 
Published: March 2021

Abstract
The possibilities of building information modeling (BIM) for solving the problems of sustainable construction to improve the quality of construction of buildings, ensuring maximum comfort inside the premises at the expense of a minimum amount of resources are studied. The assessment of the possibility of BIM for solving the problems of sustainable construction for the conservation and Thrifty use of natural resources was carried out. The use of BIM for humanistic design is analyzed. The principle of reorganization of the last stage of the life cycle (LC) of a sustainable construction object for optimizing the LC of materials and components in construction based on BIM is studied. A scheme of the machine learning process for optimizing design based on BIM is proposed.
Airtightness of High-Rises in the North
Authors: Slobodchikov E , Haruzov D 
Published: March 2021

Abstract
For the Republic of Sakha (Yakutia), effective thermal insulation of buildings is imperative for human comfort and for reducing the leakage of heat through the envelope. To design such insulation, one needs to duly consider the microclimatic specifics in the context of an extreme continental climate. Climate-induced leakage of heat through the envelope results in heat and electricity waste; such leakage is non-acceptable by modern standards. Demand for energy-efficient housing is rising. Thus, improving the thermal insulation of structures is a relevant issue.
Top-Combustion Solid Fuel-Fired Boilers: Peculiarities of Combustion as Observed in-kind in the North
Authors: Slobodchikov E , Fedorov A 
Published: March 2021

Abstract
In the climate of the Republic of Sakha (Yakutia), it is important to have efficient and reliable heat sources to survive. This is why efficient standalone heat generators are becoming ever more popular. As of lately, Yakutia’s residents tend to prefer detached housing with individual heating. However, practical experience has shown that neither domestically made nor imported heat generators are suitable for the Republic’s cold climate. This statement is reinforced by their poor heating performance that does not match the manufacturers’ claims. Such performance is mainly due to failing flue-gas stacks, a phenomenon associated with the air-fuel equivalence ratio.
Visual Identity of Seaside City’s Cultural Landscape
Authors: Erysheva E , Moor V 
Published: March 2021

Abstract
The unification of modern cities is becoming a consequence of globalization. There is a leveling of their unique features: cultural, social and visual identity. A city without a bright expressed “face” - a recognizable visual image and stable semantic associations - inevitably loses its position in today’s highly competitive market. Urban identity is becoming one of the city’s competitive advantages in the context of globalization. The potential of urban identity lies in the possibility of forming a recognizable city, maintaining the true (authentic) urban meanings, the “spirit” of the city. In this regard, it is important to actualize the visual potential of the city, as well as the process of introducing unique visual components of the city’s cultural landscape into the concept of urban identity. The article examines the specifics of a maritime city’s urban identity, revealing the uniqueness of the city at the level of visual perception, which must be taken into account when elaborating a city development strategy.
Influence of Polycarboxylate Superplasticizer and Mineral Additives of Various Compositions on the Technological and Physical-Mechanical Properties of Cement Systems
Authors: Nizina T A , Balykov A S , Korovkin D I , Volodin V V 
Published: March 2021

Abstract
Management of the pore volume and the mineral-morphological state of the hardening system by modifying the cement stone with chemical and mineral additives introduced both separately and in complexes is considered to be one of the defining directions of concrete structure formation. The purpose of this study was to establish the regularities of the influence of mineral additives of various compositions (siliceous, aluminosilicate, sulfoaluminate, carbonate) and polycarboxylate superplasticizer on the technological and physical-mechanical properties of cement systems, with the identification of the most effective modifiers and their complexes. Based on the results of experimental studies, it was established that it is possible to obtain, on the basis of sulfoaluminate modifier, compositions with high technological parameters with a reduced content of expensive polycarboxylate plasticizer. It was found that the studied compositions with mineral additives differ in high rates of compressive strength gain of cement stone at the age of 3 and 7 days - 48÷69 and 71÷83% of the compressive strength at the age of 28 days, respectively. At the same time, in comparison with the reference composition without mineral additives, the relative compressive strength of the modified cement stone at the age of 28 days varies in the range from 0.9 to 1.2 relative units, which confirms the possibility of increasing the strength indicators of cement composites due to the use of optimal complexes of polycarboxylate superplasticizer and mineral additives of various compositions, in particular when using microcalcite, microsilica and sulfoaluminate modifier together.
Comparative Analysis of Resource Evaluation Methods on the Example of Welded Connections of Offshore Oil and Gas Facilities Background
Authors: Starokon I 
Published: March 2021

Abstract
The world is actively developing offshore oil and gas fields. Various hydraulic structures are actively used for offshore production. Offshore fixed platforms have become widespread among these hydraulic structures. During operation, these platforms are subjected to various loads and influences, which include wind-wave and ice loads, temperature and vibration-vibrational effects, etc. causing their gradual destruction. Therefore, the determination of the values of the duration of the safe operation of welded joints of offshore platforms from the moment of their operation until the onset of their destruction, which is also called a resource, is a key requirement for ensuring the safe operation of these structures.
Mechanisms of Increase in Organizational and Technology Reliability at Management of Innovative Construction Production
Authors: Belousov V E , Stroganova Y S , Tutarishev Z B 
Published: March 2021

Abstract
In article the problem of distribution of technology dependent works on contractors is considered during creation of the innovation production due to capital investments in means of mechanization and automation of construction production that allows to construct such schedule by means of which time of accomplishment of the corresponding amount of works is minimized by the set great number of contractors and the optimum sequence of their accomplishment is defined. At the same time job sharing on contractors with use of methods of research of stream — Dijkstra’s algorithms is considered optimum. The relevance of creation of this model is defined by need of rational use of human resources. It is possible to carry possibility of process description of construction to advantages of model at the same time of several objects the innovation means of production with increase in parameters of organizational and technology reliability.
Compositional Features of Modern Urban Landscape Spaces
Authors: Dormidontova V 
Published: March 2021

Abstract
The article is devoted to the studying of the compositional solution and the analysis of the creation of parks characterized by linear-axial composition. The historical roots of linear spaces are noted. The history and principles of creating Promenade Plantee in Paris, High Line Park in New York, the Tide in London, the Cheonggyecheon Park in Seoul are outlined. On the example of these landscape objects the compositional analysis is fulfilled. As a result, the basic principles of modern linear-axial spaces compositional construction are identified. Distinctions from historical analogues are highlighted. It is concluded that the linear type of space has flexibility and susceptibility to new functions, the ability to transform in modern conditions into an actual, urban planning justified and popular model of urban public space.
Analysis of Stability Criteria of Retaining Structure Slope and Reservoir Banks with Deformed Reinforced Concrete Anchorage
Authors: Karpushko M O , Bartolomei I L , Karpushko E N 
Published: March 2021

Abstract
The conditions of the impact of wind waves on the soil upland slopes of retaining structures and natural banks, which are fastened in the form of reinforced concrete slabs of the covering with deformations, are considered. The results of the analysis of field examinations of the state of reinforced concrete fastenings of slopes and banks of artificial water bodies under the influence of wind waves are presented. A criterion is proposed for assessing the stability of soil slopes and coastal slopes with reinforced concrete fasteners with a broken structure, and the conditions for its applicability are determined.
Stochastic Models of Project Time Management
Authors: Barkalov S A , Kurochka P N , Kalinina N Yu 
Published: March 2021

Abstract
The importance of the project time management process is noted. It is shown that the main factor affecting the temporal characteristics of the project is the composition of the project team. The process of forming a project team is considered taking into account the fact that the main characteristics of the performers, in particular their labor productivity, will be stochastic values. We consider the design process of the organization of the project, which is reduced to a stochastic programming problem, which reduces to a deterministic problem and can be solved by numerical methods. For a random variable with a normal distribution law, the problem statement is given in an analytical form. Concrete recommendations are given for determining the distribution law and solving the problems of managing construction production.
Cogeneration Plant Optimization
Authors: Mitiukov N W , Spiridonov S V , Samigullina G Z 
Published: March 2021

Abstract
As the analysis of publications on cogeneration shows, most authors present it as a way to increase the efficiency of existing power generation plants by utilizing the generated heat. It is shown in the work that cogeneration is a complex system that allows maneuvering the proportion between the received thermal and electrical energy. In this regard, it seems promising to develop a cogeneration system in which this proportion could be regulated. There have not been such systems in the published patents yet. Regulation of the proportion between heat and electricity can be carried out in accordance with the changing tariffs for these two types of energy, as well as depending on production tasks. Existing cogeneration systems are usually adaptations of existing power plants optimized for optimal electrical energy consumption. Cogeneration systems should be optimized for the maximum total consumption of heat and electricity at a minimum cost. Apparently, in the conditions of existing calculation methods, this problem has not been solved yet. Therefore, the optimal values for cogeneration should be sought outside the currently accepted design parameters and operating modes of power plants.
The Formation of Bimetallic Materials by the Electron-Beam Additive Manufacturing
Authors: Chumaevskii A V , Kalashnikova T A , Panfilov A O , Gusarova A V , Knyazhev E O , Kalashnikov K N , Nikonov S Yu 
Published: March 2021

Abstract
The structure of Cu-Ni system polymetallic materials samples produced by the electron-beam additive technology has been studied. Two types of samples were manufactured: with a smooth and sharp gradient. The separation effect of the nickel alloy from the copper substrate was found in a number of experiments. More intensive heating of the substrate before the first layer was applied, which resulted in the formation of a smoother transition zone from copper to nickel alloy, but did not solve the problem due to uncontrolled diffusion in the molten bath. The use of the multi-wire gradient printing with simultaneous feeding of two filaments allowed to form a smoother transition in the boundary zone.
Study of Influence of Climatic Factors of North on Properties of Polymer Composite Textolites
Authors: Lukachevskaya I G , Lebedev M P , Kychkin A K , Struchkov N F 
Published: March 2021

Abstract
Influence of a very cold climate on properties of basalt and glass textolites made by an infusion method by successively laying a reinforcing material on a mold and impregnating with a three-component epoxy binder is studied. Full-scale climatic tests at an open proving ground during 2 years led to a decrease of ultimate tensile strength by 14% and an increase of ultimate bending strength by 18% for the basalt textolite, the increase of the ultimate tensile strength by 9% and the ultimate bending strength by 22% for the glass textolite. Conducted studies of changes of surface relief showed insignificant variations of average amplitude of inhomogeneities up to 0.4 μm for the basalt textolite and up to 4 μm for the glass textolite. The conducted studies of these materials demonstrated their resistance to the climatic influences in a region of the very cold climates, which is confirmed by a high level of preservation of their strength parameters.
Assessment of the Impact of Air Pollution on Plants in the City of Krasnoyarsk
Authors: Avdeeva E V , Izvekov A A 
Published: March 2021

Abstract
The background state of the environment of urban areas is formed due to the combined effects of industrial and transport emissions, as well as as a result of their secondary interaction. The concentration of emissions depends on landscape, urban planning and weather conditions. The environmental background affects the changes in individual landscape elements.
However, processes occur in separate points of the city that additionally form or disperse pollutants, as a result of which local situations develop at the micro-territorial level, which differ from the background state of the environment. In this case, the local situation may differ both in the positive and in the negative direction.
More comfortable conditions develop in areas where planning decisions correspond to microclimatic and orographic situations, in large landscaped areas, near water bodies, etc. Local conditions that increase the level of environmental pollution are formed by situations that depend on territorial distribution, intensity of occurrence, time of occurrence and duration adverse effects. Therefore, when designing landscaping objects and choosing technology for planting care, it is necessary to take into account the conditions for their growth at the local level. At the same time, the assessment of phytoecological conditions should include landscape, urban, syn, and outecological aspects, which determine the growth and development of individual plants and the state of plantings as a whole [1].
The Main Regularities of Changes in the Composition and Properties of Saline and Non-Saline Clayey Sediments with Diffuse Leaching
Authors: Shekochihina E V , Kalinovsky S A , Stepanova E A 
Published: March 2021

Abstract
The paper contains the results of their own research on the problem of diffusion leaching of unsalted sarmatian clays and analysis of data from other authors who study this problem on samples of saline clay rocks. Changes in the physical and mechanical characteristics of clay rocks, which may be the bases of buildings and structures, during their diffuse leaching are considered. It is concluded that unsalted sarmatian clays that do not have fine pyrite in their composition and saline quaternary clay rocks of various genesis are less resistant to flooding than saline marine clays.
Intelligent Transportation Strategy to Promote Sustainable Urban Transport Tools (Case Study of the City of Najaf - the Republic of Iraq)
Authors: Al-Shebillawy E J , Stetsenko S E , Al-Mossawy B A 
Published: March 2021

Abstract
Upgrading the level of transportation and its services is an urgent necessity, especially since the development of cities is measured by the most important indicators of development in the urban field, and among the most important of these indicators is what is known as smart transport, as it means smart transportation using modern technologies of communication and information technology to face many challenges in various areas of transportation, And the elimination of all obstacles that stand in the way towards achieving a smart urban environment in light of the lack of a clear urban policy to benefit from smart transportation applications and the absence of strong management of the concerned authorities, as the smart transportation strategy in the holy city of Najaf aims to improve many indicators of mobility and traffic movement in general by the year 2030, as it includes the introduction of smart transportation systems as one of the ideal solutions to traffic problems. Part of this strategy includes establishing an express metro network along the main roads of the city and down to the city centre, Also, following this strategy leads to raising the level of traffic safety, reducing carbon emissions, reducing the demand for parking, reducing the cost of transportation, as well as reducing the time of arrival to the city centre and the removal of traffic jams from the vital city centre.
Comparison of Energy Efficient Air-Conditioning Systems
Authors: Khasikov S , Thurston U 
Published: March 2021

Abstract
The purpose of this paper is to provide a comparison of energy-efficient air-conditioning systems in an office building in a warm, tropical climate. Miami, Florida was the city used for the demonstration. A typical office building from the coast of Miami was selected and to do a proper assessment of the energy efficiency of different air-conditioning units, we designed the shell of the office building and simulated the energy usage in eQUEST software. The software then generated the results for examining the energy usage of each air-conditioning systems and allowed us to determine which would be the most energy efficient based on the results received.
Dynamic Analysis of Ballastless Rail Superstructure on a Track Switch
Authors: Smirnov V A 
Published: March 2021

Abstract
Proposed article presents design procedure and dynamic analysis of a ballastless rail superstructure used to decrease the vibration from the moving trains in underground tunnels located adjacent to residential and commercial buildings. The rail superstructure features a floating slab consisting of a reinforced concrete (RC) slab with direct fixation of railway fastenings and elastomeric bearings, that transfer the loads from the floating slab to the tunnel casing. A track switch is mounted on a FST. The aim of the design procedure is to select required static and dynamic properties of elastomeric bearings made of cellurar polyurethane as well as the amount of reinforcement taking into account deteriorating properties of both materials. FE-model created in MSC Patran/Nastran software package is used to get an insight on stress-strain state of this floating slab track structure. Proposed FE-model consists of switch track with direct fixation railway fastenings, RC track slab, elastomeric supports. Static analysis is performed to get the upper-track structure elements’ deflections as well as stress-strain state of RC slab under moving trains. Dynamic interaction of the ballastless rail superstructure is investigated using derived from FE-analysis transfer-function between the superstructure and tunnel invert. Vibration isolation efficiency under excitation frequencies of moving trains over different speed is obtained from the transfer function.