bluuebunny/crossref_metadata_2025_split huggingface dataset:
Biochemical tests and identification of potential indigenous bacteria from nickel post-mining land in Pomalaa
Authors: Syahri Y F , Baharuddin  , Fachruddin  , Yani A. 
Published: December 2019

Abstract
The main problem in the nickel post-mining land in Pomalaa is the toxicity of nickel and chromium. The results of the analysis of soil samples showed that nickel levels reached 11103.74 mg/kg, and chromium reached 4030.17 mg/kg. The toxicity of nickel and chromium can cause the degradation of soil fertility. Bacteria are biological agents that are environmentally friendly, which can be used to reduce heavy metal toxicity and increase soil fertility on post-mining land. This study aims to examine biochemically six indigenous bacteria resistant to 10 ppm NiCl2 and four indigenous bacteria resistant to 10 ppm CrCl2 and identification. Based on the results of biochemical tests known indigenous bacteria from the genus Bacillus sp. is gram-positive bacteria that do not have the catalase enzyme, do not have the ability to use carbohydrates and produce endospores in their life cycle while indigenous bacteria from the genus Clostridium sp. is a gram-positive bacteria which in part has the enzyme catalase, all of which have the ability to use carbohydrates and only some of them produce endospores.
An Environmental Development Study: The Effect of Vegetation to Reduce Runoff
Authors: Rakhim A. , Nurnawaty  
Published: December 2019

Abstract
Water absorption on land is influenced by several factors, namely, soil conditions and vegetation of land cover. The denser the condition of the soil surface, the infiltration rate will be smaller, and runoff will increase. The purpose of this study was to determine the role of plant roots and grass as an alternative to reduce inundation or runoff due to rain. Research on embankment soil samples in the laboratory was carried out using mini elephant grass and the roots of red shoots. Through testing of the Rainfall Simulator, the results of the tests found that the runoff without cover reached 25456.79 ml, while runoff with tree cover was 19665.10 ml. As if the tree root material can reduce 22.75% of the inundation/runoff that occurs in soil samples. Whereas in soil samples with grass cover can reduce as much as 19.35%. From this study, it was concluded that the roots of red shoots used in testing could be an alternative to land cover vegetation to minimize surface runoff.
The development of small and medium enterprises in North Kolaka Regency
Authors: Djabbar I , Baso S 
Published: December 2019

Abstract
In facing the challenges of the global economy, one of the economic pillars that survives in the midst of changing flows is Small and Medium Enterprises. With a variety of regional potentials owned by North Kolaka, it is expected that the existing Small and Medium Enterprises can develop by maximizing the potential that exists in North Kolaka Regency. This study aims to analyze and describe the Development of Small and Medium Enterprises (SMEs) in North Kolaka Regency. The research approach used was qualitative.This reseacrh is action research or known as participatory action research (PAR). The results of the study show that the development of small and medium enterprises in the district of North Kolaka still relie heavily on access provided by the local government through the services of Cooperatives and Small and Medium Enterprises including access to capital, market provision and increased human resource capabilities.
Implementations of policy for the development of partnership pattern plant (PLASMA) by plantation companies in Barito East District Central Kalimantan
Authors: Kristiana T , Jarias S , Oktavina  
Published: December 2019

Abstract
Both of Law No.39 of 2014 and Minister of Agriculture Regulation No. 98 of 2013 are reinforced by the Central Kalimantan Provincial Regulation Number 5 of 2011 concerning Management of Sustainable Plantation Businesses. Based on these three rules, researchers are interested in researching the implementation of plantation development policies in partnership patterns by plantation companies in Barito Regency East, Central Kalimantan. This research is a qualitative descriptive study, the source of information is that the East Barito Regency government, in this case, is the Office of Plantation, Head of Plantation Companies as many as 14 companies in East Barito Regency. In-depth interviews do data collection. The results of the study were analyzed; triangulation was carried out to obtain accurate data. The results showed that the implementation of the Legal and Regulatory Policy which requires community involvement in the development of a partnership (plasma) scheme in East Barito District, has not been fully implemented in accordance with the provisions.
Computational models of seismic effects taking into account the extent of the seismological information completeness
Authors: Abakov A D , Zainulabidova H R , Omarov H M , Gasanov R G 
Published: December 2019

Abstract
Approaches to the models formation of seismic effects are proposed, taking into account the uncertainty and incompleteness extent of the initial seismological information. Earthquake-prone territories are divided into three types. The 1st degree uncertainty areas include territories where seismic effect parameters can be specified in the form of probabilistic distributions, the 2nd degree uncertainty areas include territories where effects parameters can be predicted at certain intervals. The 3rd uncertainty degree includes territories where all seismological information is expressed in terms of the intensities and repetitions given in the maps of the general seismic zoning of the Russian Federation territories (GSZ-93). The computational effects with varying extent of the seismological information uncertainty and the corresponding risk functions are determined.
Formation of thermal-insulating building envelopes of dome constructions for the far north regions
Authors: Ovsyannikov S I , Suska A A , Shevchenko S. A. 
Published: December 2019

Abstract
The Far North territories development is carried out in most cases by the rotation-based work, with frequent deployment. Therefore, special conditions are imposed on the shift workers constructions. In particular, high insulating properties, resistance to wind and snow loads, multiple assembly and disassembly possibility, compactness in the traveling condition are presented to them. These requirements correspond to the dome prefabricated constructions. To calculate the thermal-insulating properties of building envelopes, climatic conditions were adopted for the city of Verkhoyansk, as the coldest settlement. The main task for such buildings is to provide the required thermal insolation with the minimum sizes of the building envelope. For this purpose, the prefabricated elements structure of dome-shaped constructions consisting of a timber frame shaped like a triangle 200 mm thick, filled with polyisocyanurate foam, a closed air space on both sides of the prefabricated elements, an OSB inner panel covered with thermal-insulating paint, an outer slab of cement-bonded particleboard, covered with bitumen tile was developed. Moisture protection of thermal-insulating materials is provided from the inside with aluminum foil, and from the external with wind-moisture-proof membrane. In the research process it was found that the thermal resistance of the building envelope without applying thermal insulating paint is R = 6,7 m2 K/W that is not enough for Verkhoyansk conditions. The treatment with liquid thermal-insulating paint increased the thermal resistance to R = 7,94 m2 K/W that exceeds the standard values.
Assessment of the impact of new construction on additional fallout of the foundations of operating buildings in constrained city conditions
Authors: Polishchuk A I , Mezhakov A S 
Published: December 2019

Abstract
The long-running building on clay soils with a life span of more than 25 years foundations sediments are considered. In the immediate vicinity of the building under consideration, the new neighboring building construction was completed at a distance of 6 m in light. The foundations of the long-used building are tape from monolithic reinforced concrete, and the new neighboring building in the monolithic reinforced concrete slab form. Both buildings foundations are arranged at the same mark. The foundation soils are represented by two engineering-geological elements: from the surface - soft plastic loam (EGE-1) 10 m thick, then - semi-solid clay (EGE-2) more than 12 m thick. The foundations bearing layer is soft plastic loam (EGE-1). The calculation revealed the long-term operated building strip foundation additional precipitations from pressure on the foundation transmitted by the new neighboring building. To reduce the additional sediment foundations considered options for the dividing wall structural solutions (different bending stiffness EI) between buildings. The buildings foundations sediment numerical calculations and their increments are made in the Midas GTS NX software package; given the results assessment.
The parameters for a retaining wall interaction mathematical model with a reservoir in the ground conditions determination in the krasnodar territory
Authors: Bolgov I V , Shmidt O A , Klikun N A 
Published: December 2019

Abstract
The main parameters affecting the interaction of the retaining wall with the reservoir foundation on the slope are considered. A reservoir park sites geomorphological structure classification in the Krasnodar Territory is proposed. The separation is made on the plain, coastal and mountainous areas, depending on the relief incidence angles. It was also found that, in most cases, the large reservoirs’ natural foundations base in the Krasnodar Territory is loam and clay consistency from solid to refractory. The obtained data were used to assess the staging impact of work on the “retaining wall - tank” system construction in the territory of the Afipsky refinery tank farm. The evaluation was carried out on a mathematical model using the finite element method in the Midas GTS 2012 software package. To model the base foundation, the program the Mohr – Coulomb model was used. The components in the construction sequence “slope trimming - retaining wall device - reservoir foundation building” have alternately changed in the model. In this case, the device structures sequence almost does not affect the tank bottom deflection.
Stress concentration in the structural elements of wind generators
Authors: Maistrenko A V 
Published: December 2019

Abstract
A three-dimensional finite element calculation of the stress-strain state for a complex-shaped metal structure has been considered. Modeling the loading process accuracy is determined. The stress fields of wind generators blade elements at the stage of their manufacture were calculated, which made it possible to identify stress concentration areas and negative reasons leading to them in the technological process of manufacturing these structures.
Impact of the city transport noise on the territory close to the streets’ intersection
Authors: Tarasova O G , Taratuta V D 
Published: December 2019

Abstract
The city of Krasnodar has a complex structure of highways. The noise generated by transport significantly exceeds the standard values. Territories located at the crossroads of streets have not been studied thoroughly. The process of spreading sound from sources at the intersections of roads is more complex. The development of additional recommendations for noise reduction for such areas is required. The results obtained are of practical interest for areas with similar placement conditions with respect to highways. Our research and developed recommendations for reducing traffic noise in residential and public buildings can be widely applied in design practice. The experimental studies in real conditions on the characteristic territory of the city of Krasnodar using current regulatory documents were performed. The research is executed experimentally with carrying out the measurements in the territory and theoretically settlement way. The good convergence of results confirms their reliability. Impact of noise in the territory of directly adjacent to the intersection, is slightly higher than values for the sites at rectilinear roads. It is established that noise pollution at a facade of the designed house does not conform to requirements of sanitary standards. The required noise reduction in rooms taking into account their appointment is established. Practical recommendations about noise reduction in inhabited and office rooms are developed. The proposed solutions will allow providing additional protection of rooms against transport noise.
The stress-strain state simulation of slopes with dynamic loads
Authors: Panasiuk L , Turina V 
Published: December 2019

Abstract
The article discusses the dynamic processes simulation in landslide slopes during dynamic effects. Dynamic effects can be caused by pulsed, including shock loads. Also, the movement of vehicles along the slope is considered. The solution is based on the general massive load movement dynamic problem formulation = on a massive basis. Discretization over the spatial domain is obtained in the finite element method (FEM) form. The equations solution is performed by the continuation method with respect to the time parameter. Direct methods of the integrating dynamics problems are used. Considering the high dimensionality of the problem in the spatial formulation, to construct a numerical solution, we use the previously obtained explicit absolutely stable direct integration schemes. The methods used can be considered as explicit, absolutely stable schemes for the direct integration of a dynamic problem with a variable mass in time. Recommendations for evaluating the numerical solution accuracy are given.
On the software package for predicting residual deformations in the pavement design
Authors: Panasiuk L N , Matua V P 
Published: December 2019

Abstract
The paper describes in greater detail the software package, simulating the residual deformations long-term accumulation process in the road structure under the moving transport load action. The complex is based on a refined model for calculating and designing non-rigid pavements. The residual deformations accumulation problem in the road construction elements and the prominences development is considered in spatial formulation and the full motion system of equations is used. This allows to determine not only the road structures elements points final displacements magnitude in a state of equilibrium, but also to investigate the irreversible movements accumulation evolution in time.
Experience of Using Crushed-stone Reinforcing Elements in Various Ground Conditions
Authors: Ter-Martirosyan A Z , Sergeev S A , Ermoshina L Yu 
Published: December 2019

AbstractStone columns are one of the widely used methods for improving weak foundation soils, since this method is not only cost-effective, but also ecologically safe, since natural materials (stone, gravel etc.) are used as stone column aggregate. Stone columns increase the bearing capacity of the foundation soils, reduce settling and help to accelerate the consolidation process. This paper presents the results of field research of crushed-stone reinforcing elements and soil between them by the plate test method and the static sounding method.
The long piles interaction with the surrounding and underlying soils, taking into account the linear and nonlinear rheological properties
Authors: Ter-Martirosyan Z G , Luzin I 
Published: December 2019

Abstract
The article presents the long incompressible pile with a two-layer base interaction problem formulation and solution, taking into account the underlying soil visco-plastic properties by the analytical method. A significant change in the stress-strain state at the base of an incompressible pile when stress changes around the pile side surface is shown. It is shown that in such conditions, the stress under the pile bottom varies significantly over time, which can lead to the pile bearing capacity loss in the long run.
Damping of high rise buildings
Authors: Zakieva N I , Grankina D V , Vasilieva D K , Tyutina A D 
Published: December 2019

Abstract
High-rise construction acquires demand in Russia and abroad. New features are practiced in order to ensure the rigidity and stability of the building frame, to withstand wind and snow loads. It is about architectural and design features. The article discusses the variations of skyscrapers damping, which are used in the design and construction of high-rise buildings in recent decades. Existing examples from around the world are also provided for clarity.
Analysis of wind load impact on the high-rise buildings glass facade
Authors: Zolotareva L A , Lebedinskaya A R , Komarova S E 
Published: December 2019

Abstract
This article discusses and analyzes the problem of finding the necessary appropriate parameters of glass in cases of panoramic glazing and the reasons for their destruction with a specific example. The influence of the buildings relative position on the formation of wind load on the glazing of a high-rise building is revealed. The article also identifies the reason for the glass enclosing structures deformation of the apartment under study in a residential complex in the urban area.
To the question of strength and stability increasing of thin retaining walls
Authors: Kalachuk T G , Shirina N V 
Published: December 2019

Abstract
The features of structural and technological solutions of strength and stability increasing of thin retaining walls and reinforcement of the backfill soil, dam, and slope are considered. Glassfiber concrete was proposed as the material for the wall which, as compared with ordinary concrete, has enhanced performance characteristics. Despite the variety of solutions for soil reinforcement and ways to minimize horizontal deformations, a new technological solution has been developed to increase the stability of the walls while increasing the additional load on the soil within the pressure prism. It is given the description of this solution and the results of experimental studies in confirmation of the theoretical assumptions about the improvement of the physical and mechanical characteristics of the backfill soil during the construction of retaining walls.
Numerical study of the base setting of the non-pressure pipe during the water pipeline construction
Authors: Olgarenko V I , Tkachev A A , Olgarenko V Ig 
Published: December 2019

Abstract
The trouble-free operation of reclamation projects depends on various factors, and the base setting is one them. Uneven setting of the structure base significantly affect the stress-strain state (SSS) of both the contractures and the structure as a whole. Neglect in the computational accuracy of the setting leads to emergencies and reduce the service life of aquiferous systems.
Advanced numerical simulation of wind effects on high-rise buildings, structures and complexes
Authors: Belostosky A M , Akimov P A , Afanasyeva I N 
Published: December 2019

Abstract
The article is devoted to the Russian design codes theoretical updating foundation ensuring the numerical modelling “legitimization” of wind effects (computational aerodynamics) on high-rise buildings, structures and complexes. Basic governing equations, requirements for computational model (boundary conditions, initial conditions, geometric model, spatial model discretization (computational grid), several numerical analysis parameters, research scheme, the peak pressure values design assessment for facade (enclosing) structures, pedestrian comfort analysis and the numerical method software implementation for wind loads computing are under consideration.
Computational analysis of the stress-strain state, strength and stability of tallest skyscraper of the Moscow international business center with allowance for static and wind loads and hypothetical local damage
Authors: Belostosky A M , Akimov P A , Dmitriev D S , Nagibovich A I 
Published: December 2019

Abstract
The paper is devoted to the stress-strain state computational analysis, strength and the load-bearing structures stability of a multifunctional high-rise residential building with an underground parking lot, developed by the architect Sergey Skuratov. This object is the tallest skyscraper, located on the territory of the Moscow International Business Center also known as Moscow-City. Static loads, wind loads and hypothetical local damage are taken into account. Brief information about the problems formulations, methodology of structural analysis and corresponding software systems, the building finite element models (including verification issues) and the analysis results are presented. The computational studies results analysis performed with the use of software package ANSYS Mechanical showed a consistent displacements and forces distribution (forces and moments) in the building foundation and frame with allowance for vertical static and wind loads, significant natural frequencies and mode shapes of building.
Estimation of spatial correlation for seismic design of buildings
Authors: Pshenichkina V A , Churakov A A , Yereschenko T V , Ivanov I A 
Published: December 2019

Abstract
The paper discusses a solution for the probabilistic problem of high-rise buildings oscillation exposed to seismic loads in form of a six-component random vector. Two groups of matrices for the dynamic response factors to help estimate the effects of spatial correlation between generalized coordinates and correlation in the various seismic vector components on design stresses in load-bearing building structures have been obtained. The spatial model of a building configured as a thin-wall compound bar provides a solution for the probabilistic problem in analytical form.
Production improvement of aqueous solutions of nanosized silica
Authors: Baskakov P S , Strokova V V , Kuzmin E O 
Published: December 2019

Abstract
The article deals with the method for obtaining aqueous solutions of silica nanoparticles based on sol-gel technology, namely, products of hydrolysis of silicon alkoxides and their polycondensation in an alcohol medium. In order to prevent polymorphic changes and dehydration of SiOH-groups, preference was given to low-temperature and vacuum methods. To combat the excessive foaming ability of surfactants and replace the solvent (alcohol with water), a method of distillation was proposed for partial supply of dry steam with air and water. To separate aqueous surfactant solution (tween-80), a method of oil flotation with petroleum ether addition, characterized by its low solubility, both in water and in alcohol, was proposed. The specifications of obtained nanosilica of aqueous solutions can be estimated using optical spectrophotometry, for which the concentration and size coefficients of the Geller Equation for this system were determined. The optimum concentration of SiO2 in the system was also determined when no particles above 100 nm were formed. Methods for the reagents reuse of ethanol, petroleum ether and tween-80 were proposed.
Asessment of corrosion fatigue strength of gas-transport system constructions under atmospheric forcing
Authors: Pirumyan N , Stakyan M 
Published: December 2019

Abstract
Calculated influence method of strengthening technology (surface plastic deformation) of gas-transport system (GTS) weld bead in the conditions of atmospheric forcing in order to increase its bearing capacity and service life is suggested. It is shown that relative strength factor of weld bead at the same time is a probabilistic function of fatigue life. Ananalogical function of the new coefficient is proposed-relative life to assess the service life of the GTS with its periodic loading. Using the system comparable and initial quantitative lines of corrosion fatigue, the equations of the functions of these coefficients are obtained, allowing to clarify the strength and durability of GTS in the real service interval and variable loading, taking into account the strengthening of weld beads.