bluuebunny/crossref_metadata_2025_split huggingface dataset:
The process of destruction of rock by an explosion with the use of blasthole stemming in roadheading mining operation
Authors: Khudoyberdiev F T , Nurboboev Y T , Maksudov Sh F , Shomurodov Sh M 
Published: December 2020

Abstract
Blasting is one of the main methods of rock destruction and accounts for approximately 20% of the cost of mining operations. Given that the efficiency of the explosion for crushing does not exceed a few percent, it becomes obvious that further improvement of explosive destruction is necessary, taking into account the new achievements of science and technology. One of the main ways to improve the efficiency of underground mining is to improve the conduct of drilling and blasting operations with the use of the stemming plays a significant positive role in the operation of the explosion.
Additive Manufacturing through Digital Concrete by Extrusion and Non-extrusion method
Authors: Singh P , Sreerag K S 
Published: December 2020

Abstract
The phase of construction industries is very weak to adapt new technologies. We faced plenty of problems related to our construction industries because of old conventional method. Digital Concreting (DC) is the techniques from Additive Manufacturing (AM), the concrete is laying like layers to build a whole structure. DC could to overcome the problems faced by conventional construction. Furthermore, the DC will open the windows that allow the new innovative technologies enter in to construction industries. Generally, the usage of concrete is more than enough so it leads to increase the waste in site and harmful to environment. In DC technique uses of the concrete is only for need and no excess use. The properties of concrete are different for printing compared to conventional method. In this paper, we discussed about the general view on DC, properties of concrete and the methods used to print.
Nonlinear vibrations of a circular plate reinforced by ribs
Authors: Khalmuradov R I , Ismoilov E A 
Published: December 2020

Abstract
The behavior of a circular elastoplastic plate, consisting of a shell and reinforced ribs of a quadran-gular cross-section and under the action of dynamic loads, has been investigated. The rib sections are considered to be constant. The relationship between deformations and displacements is taken geometrically nonlinear, and between stresses and deformations in the form of Hooke’s law. Refined equations of the Timoshenko type are taken as resolving ones. It is believed that the vibrations of the plate are excited by a dynamic load acting on the surface of the plate. The solution of the differential equations for the vibrations of the plate, taking into account the elastoplastic properties of the shell materials and the reinforced ribs, is carried out by the finite difference method. The elastic and elastoplastic models are used to calculate the deflections of the central point and forces depending on the location of the ribs. In particular, it has been established that: when the plate is reinforced with one rib, the smallest deflection of the center point can be achieved when the rib is located in the middle of the radius; the proposed model and calculation method allow achieving the desired deflection value by varying the number of ribs.
Nano-Silica and its Role on Performance of Cement Concrete-A Review of Experimental Investigation
Authors: Paktiawal A , Alam M 
Published: December 2020

Abstract
The researchers are generally focusing on the basic technology of cementitious materials at the nano level. In addition, the researchers are mainly aimed at enhancing the durability and strength of concrete and have found rapidly developing the mechanical and microstructural properties of cementitious materials with the introduction of nano-silica. The present paper reviewed and summarized the experimental research works carried out on the use of nano-silica in cement concrete mix as an additive or replacement of cement and its effects on rheology of the fresh concrete, and properties of hardened concrete such as strength, and durability. Thus, nano-silica is a promising material which can be used to improve the properties of the cement concrete.
Increasing the efficiency of urban public transport (UPT) services through the use of multimodal transport technologies
Authors: Atajanov M , Solayev S S 
Published: December 2020

Abstract
The present paper investigatesthe problem of providing integrated transport services to passengers traveling from suburbs to the city center. Options for the organization of the route “From the resort of healing waters - Tashkent railway station” will be studied. By using the multimodal transportation technology, and by taking an account the following demandslike the timetable, comfort, the price of transportation of passengers, the possibility of independent mobility to the different destinations will be organized. The article proposes a set of measures of improving public transport services on the routes in suburbs or from suburbs to the city center.
The influence of hydraulic friction on the maximium pressure of water hammer
Authors: Arifjanov A , Jonqobilov U , Jonqobilov S , Khushiev Sh , Xusanova J 
Published: December 2020

Abstract
The article presents the results of theoretical and experimental studies of the effect of hydraulic friction on the maximum increase in pressure during water hammer. To solve the problem of determining hydraulic friction along a pressure pipe, the telegraph equation was adopted as a mathematical model. As a result of solving the adopted equation, dependence is obtained for calculating the energy loss in a non-stationary process. The calculations of the proposed formula are in good agreement with the experimental data of the author. This proves the legitimacy of the obtained dependence of the author and provides an accurate calculation of pipes for strength during impact and resource saving of pipe material.
Method for sealing ground in trench closed drain
Authors: Vafoev R , Vafoev S , Akhmedov S , Imomov Sh 
Published: December 2020

Abstract
To improve the reclamation state of the land, a big role is played by a horizontal horizontal drain, which does not give for raising the level of groundwater and collect salt water during irrigation. For the protection of drainage from destruction and flushing, an important role is played by the compaction of the ground, which inside trench. The article addresses the issue of ground compaction in trenches of closed drains. The article gives the advantages and disadvantages of the existing methods of compaction of ground in trenches of closed drains, the results of a study of methods of compaction of ground in trenches of closed drains showed that backfilling and compaction of the ground is done separately, these operations must be performed simultaneously, this article gives the design of a compaction device that must be performed simultaneously, the basis theory of ground compaction, the results of laboratory research, the results of the study determined: acting ground force on the surface of the sealing blade (F = 12 kN/m
2), the outer diameter of the sealing blade (Dou
= 300 mm), the inner diameter of the sealing blade (Din
= 600 mm), the coal between the blades (ϕ = 15 … 30°), the rotational speed of the blade shaft (n = 360 tu/min), degree coefficient (Ks
= 1,22) of ground compaction, ground density ρg
= 1375 kg/m
3).
Study on the selection of the best forms of walnut in Uzbekistan
Authors: Butkov E A , Mamutov B Kh , Nikolyai L V , Kasimkhodjaev A 
Published: December 2020

Abstract
This paper provides information on the status of work on walnut selection in Uzbekistan. The requirements for the identification of commercially valuable forms of walnut, which are suitable for producing different sorts of walnut, are highlighted and defined. As well as, the presented forms are dedicated to the creation of new sort of walnut for cultivation in plantations in Uzbekistan.
The mechanism of destruction of plant rhizomes under the influence of an electric pulse discharge
Authors: Toshpulatov N T 
Published: December 2020

Abstract
The elimination of the harmful effects of weeds is a global challenge to the present day. The problem has become especially important from the clogging of cultivated areas with perennial rhizomatous magpies such as Humay, finger pigs. It should be noted complexity problems associated by preventing invasion harmful perennial rhizomatous weeds which is associated with versatility reproduction (reproduction seeds and rhizomes under any weather-climatic and soil conditions) lack of specific measures and means of destruction, poor quality of quarantine or failure to timely comply with measures to prevent harmful effects, high cost or increased danger of chemicals. Given the above-described circumstance in the article is discussed solution to problems of destruction perennial rhizomatous weeds using dielectric strength pulse and current with high voltage.
Cleaning process simulation of the dielectric sorting device
Authors: Lee A , Allaniyazov S , Sharipov Z , Norov B , Sattorov M , Xudaev I 
Published: December 2020

Abstract
The article presents theoretical studies to substantiate some parameters of the dielectric sorting device of alfalfa seeds, in particular: the width of the outlet slot of the hopper, the step and depth of the metering groove, the length of the limiter and the angle of its installation. When developing a theoretical study to substantiate the parameters of the sorting device, the physical and mechanical properties of a heap of alfalfa seeds were taken into account. Substantiated parameters make it possible to improve the design and thereby improve the technological process of sorting and cleaning of alfalfa seeds of a dielectric sorting device.
Issues of involvement in circulation of unused agricultural lands in Uzbekistan
Authors: Babajanov A R , Inamov B N 
Published: December 2020

Abstract
This article examines the reasons for the withdrawal of highly valuable irrigated arable land from agricultural turnover in the Republic, provides a number of statistical data in this direction, indicates ways to eliminate this situation with the help of state measures, and based on a comprehensive analysis, provides scientific and practical recommendations for the return of unused areas of irrigated arable land to agricultural production.
Mathematical modeling of the interaction of the main parts of a wheel tractor and the numerical determination of the operator’s seat oscillation
Authors: Ermatova D , Imomov Sh , Matmurodov F 
Published: December 2020

AbstractIn article is given mathematically modeling of fluctuation, movement and kinematic forward axle, suspension bracket of a skeleton, engine, cabin and seat of the wheel tractor. It is given an analytical type of the equation, the describing vertical fluctuations and longitudinally angular fluctuations of a cabin and the main parts of the tractor. Using this model will be found as far as distances are displaced the main parts of the tractor at vibration. The equations of linear system fluctuation with one degree of freedom of the under cabin damper, which shock-absorber of the tractor, are described.
Applying Machine Learning Techniques to Extract dosages of Fertilizers for Precision Agriculture
Authors: Singh P , Garg Ch , Namdeo A 
Published: December 2020

Abstract
Increasing cost of fertilizers and subsidies are proving to be a burden on agriculturists as well as the government. Now it’s high time to involve technology so that precise amount of fertilizers could be added in order to obtain maximum yield. Machine learning is an important tool that can be used to predict precise nitrogen, phosphorous and potassium for fertigation. But due to different soil types and different needs of different crops and varieties, it has become difficult to predict the exact amount of fertilizer needed. In this research paper a solution has been drawn to obtain precision in agriculture. Data has been collected from soil reports, soil science institutes and agriculture institutes of India. It has been rearranged into tables and pre-processed for applying machine learning models. Once the models were applied their accuracies have been evaluated using various parameters. Also, the predictions given by our model were compared by already existing recommendations. This work has been done for irrigated wheat growing areas of India and it could be extended to other crops and other areas all over the world.
Effective agrotechnology for cultivation of forage crops
Authors: Allashov B D , Zulfikarov M X , Toreev F 
Published: December 2020

Abstract
In order to develop agrotechnology for the cultivation of fodder crops, crops were studied in different versions and in different rates of sweet clover of the white variety “Kibray”, oats “Uzbek broadleaf”, rye “Shalola”, triticale “Prag Silver” and corn “Uzbekistan-2018”. In variants planted in a two-component mixture, 4 variants were tested in each. Each variant was analyzed for valuable agricultural traits, especially the yield of the zeed mass. The cost-effectiveness of each option was also examined. An effective variant of sowing white melilot in combination with cereals and legumes was revealed.
Agrotechnology of Melilotus albus cultivation in saline area
Authors: Annaeva M I , Toreev F N , Yakubov M M , Allashov B D , Mavlonova N , Tursoatov S 
Published: December 2020

Abstract
In order to organize a profitable agrotechnology for the cultivation of Melilotus albus in saline area, Melilotus albus’s Kibray variety and Tashkent-1 variety of common alfalfa seeds for comparative study in different versions were studied by sowing in 4 versions, different sowing norms. For each version, valuable farm traits during the vegetation, especially blue mass yield and hay yield were analyzed. Just like that, to each version economical effective ness was studied. In saline areas has been identified an effective version of the sowing norm Melilotus albus.
Features of creating wear-resistant anti-corrosion coatings with a barrier layer on fragments of fuel claddings from E110 o.ch.
Authors: Kalin B A , Yashin A S , Dzhumaev P S , Safonov D A , Korenevsky E L , Fedorov D A , Novikov V V , Kuznetsov V I , Fedotov P V , Krivobokov V P , Yanin S N , Mokrushin A A , Polunin K K , Uglov V V 
Published: December 2020

Abstract
Results of the development of protective chromium-containing coatings based on the FeCrNi and CrNi systems for fuel claddings within framework of the accident tolerant fuel (ATF) are presented in this paper. Coatings were deposited by the outer surface of cladding tubes fragments from E110 o.ch. alloy (sponge-based Zr-1%Nb) up to 500 mm length by complex ion-plasma treatment on ILUR-03 and KVK-10 installations. The results of the control tests carried out in high-temperature steam at the GAZPAR bench at 1200 °C up to 400 s showed that Cr-FeCrNi-Cr and Cr-CrNi-Cr coatings reduce total oxygen penetration into the alloy from 144 to 98 and 55 μm, respectively and Cr-CrNi-Cr coatings with a Mo barrier layer completely block the diffusion of oxygen into the material.
Regularities of instantaneous (flash) spark - plasma sintering of silicon carbide
Authors: Kazakova V , Shornikov D , Tenishev A , Shornikova E 
Published: December 2020

Abstract
This paper shows the possibility of producing high - density materials based on silicon carbide in a short time with the methods of electropulse consolidation and flashsintering. During the experiments, several types of modes were considered which vary from each other by different initial data (pressure, temperature, power).While analyzing the data, a flash - sintering mode has been improved. The sintering of silicon carbide with the given mode allows producing a sample with a density equal to 97% of its theoretical density.
Modeling the atomic structure in the vicinity of the spherical voids and calculation of void growth rate anisotropy in bcc iron and tungsten
Authors: Nazarov A V , Melnikov A P , Mikheev A A , Ershova I V 
Published: December 2020

Abstract
We study the influence of the atomic structure in the vicinity of voids on their growth rate anisotropy. In the first part, we model the atomic structure in the vicinity of nanovoids in α-Fe and W using the advanced Molecular Statics method. In the second part, we use the earlier obtained equations that taking the influence of elastic fields into account to calculate the shifting rate of the void surface elements, and to evaluate the components of the strain tensor we use the atomic structure modeling results from the first part. The calculations are performed for voids of several sizes at certain oversaturation’s in a wide temperature range. The simulation results for the mentioned metals with a bcc structure show that displacements of atoms located along the crystallographic directions of the <100>, <110>, <111> types in the vicinity of the voids are significantly different, and this anisotropy of atom displacements leads to a reduction of spherical symmetry for the shifting rate of the surface elements. As the result, the initially spherical void shape becomes faceted.
Kinetics of segregation formation in elastic field of edge dislocation in bcc iron
Authors: Gusev A A , Nazarov A V 
Published: December 2020

Abstract
We study the kinetics of the redistribution of impurity atoms in the elastic fields of dislocations. Study is based on taking into account the influence of elastic fields on diffusion fluxes of interstitial impurity atoms. The study is performed by computer simulation methods and consists of several stages. The first is the simulation of a dislocation core structure with a Burgers vector along [100] direction by using the modified molecular static method. The second is obtaining the coefficients that determine the influence of the components of the strain tensor on the diagonal elements of the matrix of diffusion coefficients and in the equations for fluxes of carbon atoms in bcc iron. The third stage is associated with modeling the diffusion characteristics of carbon atoms by the method of molecular dynamics in a crystal without defects. The fourth and final stage uses the data about atomic structure that we obtained at first stage, as well as the characteristics calculated in the second and third, is a simulation of the formation of segregations of interstitial atoms, which is based on solving diffusion equations that take into account the elastic deformations created by the dislocation. The complex of developed models is used to analyze the kinetics of segregation formation. 3D graphs illustrate the distribution of interstitial atoms in the vicinity of a dislocation for different times at certain temperatures.
Effects of Electrical Shock and Blue LED Treatments on the Growth, Yield and Quality of Grey Oyster Mushrooms (Pleurotus sajor-caju)
Authors: Ibrahim Roshita , Boon Loh Soon , Hasnoel Mazidi Mazlin Nur Iman , Yaacob Noorulnajwa Diyana 
Published: December 2020

Abstract
Grey oyster mushrooms (Pleurotus sajor-caju) is an edible mushroom cultivated in Malaysia mainly due to its high nutritional and medicinal value. The demand of Pleurotus sajor-caju in local and foreign market rises continuously. In this study, the effect of electrical shock treatment and exposure to blue color LED on the growth, yield and quality of Pleurotus sajor-caju was investigated. There were 6 sets of electrical shock and blue LED treatments applied during spawning and production phase. Mushroom bags which did not receive any treatment were served as Control. The effect of electrical shock and blue LED treatments were observed in the aspects of mycelium growth rate, number of days taken for mycelium to fill-up the bag, pinhead emergence and fruiting body formation. There were significant enhancement in the yield for grey oyster mushroom for the bag treated with Electric and Blue LED, in the total fresh weight of fruiting bodies, number of fruiting bodies, percentages of biological efficiency and substrate utilized for every 100 g mushrooms produced. Therefore, the mushroom bags which were treated with electrical shock and blue LED is the best compared to the other treatments due to significant higher rate of mycelium growth, relatively higher yield and good quality of mushroom.
Thermal pyrolysis of empty fruit bunch (EFB) in a vertical fixed-bed reactor
Authors: Mohamed A R , Awang A N , Mohd Salleh N H , Ahmad R 
Published: December 2020

Abstract
In the production of crude palm oil, huge quantities of solid biomass waste is generated such as empty fruit bunch (EFB), palm fronds and palm–pressed fibre (PPF). This inevitably resulted in the environmental pollution due to its natural conversion to methane. In this study, thermal pyrolysis of EFB was conducted using a fixed bed reactor. The factors such as nitrogen gas flowrate and holding time that affect the distribution of pyrolysis product yields were being investigated by evaluating the percentage product yields. It was determined that at nitrogen gas flowrate of 300 cm3/min and 30 mins holding time, the maximum bio-oil yield of 46.20 % was attained with gas and char yield of 21.79 % and 32.01 % respectively. The existence of functional groups in bio-oil was analyzed by Fourier Transfrom Infra-Red (FTIR) spectroscopy. It was identified that the bio-oil has several functional groups such as hydroxyl (OH), ketone/aldehyde (C=O) and ester (O-C=O) groups. The dynamic viscoscity of bio-oil was analyzed by Brookfield viscometer. It showed that the viscosity of bio-oil decreased with increasing temperature from 25-50 °C.
Effect of Extraction Conditions on The Phytochemical Properties of Clinacanthus nutans Using Pressurized Hot Water Extraction (PHWE) Technique
Authors: Abduljabbar M.K. , Kasim K.F. , Ma’Radzi A.H. , Sofian-Seng N.S. 
Published: December 2020

AbstractClinacanthus nutanis an important herb species from the family Acanthaceae and is commonly found in Southeast Asia. It is also known as snake grass, or ‘belalai gajah’ in malay. The leaves ofC. nutancan be used to make a refreshing juice or tea, or even consumed raw as ‘ulam’, a traditional malay salad. In this work, the leaves, stems, and a mixture of both leaves and stems ofC. nutanare first dried in an oven at 50°C for 24 hours and then grounded into a powder. Then, pressurized hot water extraction (PHWE) is used to extract phytochemicals from the powdered samples at 120°C for 20 minutes. This work investigates the effects of three important parameters for extraction; the sample particle size (<63 to 500μm), solventto-sample ratio (10:2 to 50:2 v/w), and sample weight (0.5 to 3.0g) on the extracted phytochemicals’ total phenolic compounds (TPC), total flavonoid compounds (TFC), and 2,2-dipheny1-1picrylhydrazyl (DPPH) scavenging activity. The experiments are carried out in triplicate and the results are analyzed using Minitab. Phytochemicals extracted from 2g leaf powder samples of particle size <63μm using a solvent-tosample ratio of 50:2 (v/w) resulted in the most favorable results for TPC, TFC, and DPPH scavenging activity. The results are found to be significant with the