bluuebunny/crossref_metadata_2025_split huggingface dataset:
Growth and yield of shallots (Allium ascalonicum L.) Lokananta in various doses of nitrogen fertilizers and number of plant per hole in coastal sandy land
Authors: Saparso  , Kartini  , Apriliyanto I D 
Published: February 2021

Abstract
This research aimed to determine the effect of N fertilizer dose, number of plant/hole, and their interaction on the growth and yield of shallots. The research used a Randomized Complete Block Design (RCBD) with two factors: various doses of N fertilizer (P) (P1=90, P2=180, and P3=270 N kg/ha) and number of plant/hole (T) (T1=1, T2=2, T3=3, and T4=4). The observed variables were plant height, number of leaves, leaf area, chlorophyll content, stomata opening width, stomata density, weight of fresh and dry leaf, root and tuber, fresh and askip tuber yield, root length, number of roots, number of tubers, and tuber diameter. Obtained data were analyzed using F test then followed by Duncan Multiple Range Test (DMRT) of 5% level if diversity occur. The results showed that N fertilizer of 180 kg/ha produced higher plant height (25.78 cm), density of morning and evening stomata (71.86/mm2 67.03/mm2, respectively) with fresh tubers yield of 8.48 t/ha. One plant/hole showed higher yield of tuber diameter (4.68 cm), two plants/hole showed higher height (25.67 cm), and four plants/hole showed higher number of leaves (9.38 strands), roots (73.56 strands), and tubers (4 pieces). There was no interaction between both factors to the observed variables.
The effect of feeding antioxidant rich coffee on glucose blood response, MDA and SOD on diabetic rats induced with streptozotocin
Authors: Dwiyanti H , Setyawati R , Prihananto V , Krisnansari D 
Published: February 2021

Abstract
This study aimed to examine the effects of antioxidant rich coffee on blood pressure, glucose blood response, levels of MDA and SOD serum, and liver tissue of Wistar diabetic rats. The study used 24 Wistar rats in which 18 rats were induced with Streptozotocin of 60 mg/kg BW for 4 days to make them diabetic (fasting blood glucose level >250 mg/dL). Rats than divided into 4 groups: 1) control group (non-diabetic group), given distilled water, 2) diabetic control group, given sugar cane coffee of 0.45 gram/200 g BW/day, 3) diabetic group, given antioxidant rich coffee of 0.45 g/200 g BW/day, 4) diabetic group, given antioxidant rich coffee of 0.90 gram/200g BW/day. Weekly observations were made on blood pressure, fasting blood sugar levels, body weight and blood pressure, as well as serum and tissue levels of SOD and MDA. The results showed that coffee rich in antioxidant significantly reduced oxidative stress in diabetic rats with lower blood pressure, serum MDA values, and the tissue MDA value than that in the diabetic rats given sugar cane coffee. This illustrates that consuming 0.90 g/day antioxidant rich coffee in mice, or the equivalent of 60 g/day in humans, can reduce oxidative stress in diabetes.
Morphology characteristics of orchids species in Bukit Barisan, Bengkulu province
Authors: Miswarti  , Calista I , Putra W E , Oktavia Y , Yuliasari S , Musaddad D , Sastro Y 
Published: February 2021

Abstract
The species orchid is one of the rich local genetic resources of Bengkulu Province. Information on the diversity of orchid species in Bengkulu has not been widely disclosed, so characterization is needed. This study aims to identify and characterize orchid species based on morphological characters. The study was carried out in Bukit Barisan, Central Bengkulu, Kepahiang, Rejang Lebong and Lebong from April to December 2018. The orchid data collection was carried out by exploration methods and direct observation of orchid plants in situ and exitu. In-situ observations were made on all orchid species found in their habitat and were flowering or fruiting, while the external observations were made on orchids that were not flowering and bearing fruit in their habitat. The samples of these orchids are collected and maintained beforehand until they grow flowers and fruit. Observations were made on morphological characteristics, namely the growth pattern of stems, pseudobulbs, leaves, flowers and fruit. Determination of the types of orchids identified in accordance with orchid guidelines. There are 15 genera consisting of 34 types of orchids with various forms of stem growth, pseudobulbs, leaves and flower colors.
Efficacy of different dose of fungicide Mancozeb against purple blotch complex (Alternaria porri) of Shallot
Authors: Korlina E , Hasyim A , Hermanto C 
Published: February 2021

Abstract
Shallot (Allium ascalonicum L) is subjected to attack by a number of diseases caused by fungi, bacteria, and viruses which are the major constraints for higher production. Among the several diseases which attacked shallot, purple blotch disease of shallot caused by Alternaria porri (Ellis) Cif, is one of the most destructive disease; causing accountable losses of about 57 percent. Present study was aimed to determine the efficacies of different doses of fungicide (Mancozeb) against Alternaria leaf blight in shallot. A field experiment for the evaluation of different doses of mancozeb was conducted at Subang, West Java. The research used randomized complete block design (RCBD), with 6 treatments and 5 replications. The treatments were six doses of mancozeb (3 g/L; 2.25 g/L; 1.5 g/L; 0.75 g/L; 0.5 g/L and 0 g/L of water) were applied after 7 days intervals. All Mancozeb doses reduce the disease severity compared to untreated control. Among the different treatments, minimum disease intensity (13.33 %) was observed when the plots were sprayed with mancozeb 3 g/L followed by mancozeb 2.25 g/L (20.27%), mancozeb 1.5 g/l (20.53%), mancozeb 0.75 g/L (21.07%) and mancozeb 0.50 g/L of water respectively.
Passenger trips analysis determined by processing validation data of the electronic tickets in public transport
Authors: Fadeev A I , Alhusseini S 
Published: February 2021

Abstract
Based on the set of trip-legs obtained by the algorithm described in our earlier work-trip-legs were sorted by their start or end time for each ticket- we managed to identify the set of passenger correspondence which consists of one or several trip-leg based on the analysis of the transfer conditions. Advanced and in-depth study of passenger correspondence is pivotal for solving transport-planning tasks and avoiding any mistake happened at some point at trip identification. In this work, we will process two matters: distribution transfers by time and identify short activities trips. This work shows that for a two-hour period of free transfer, the share of free trips will be about 17% of the total number of trips. In details, 12% of passengers per day will take one free trip and the share of passengers who will perform two or more free transfers is about 5% of trips. For a one-hour free transfer period the share of free transfer will be about 10%. Passengers with one free transfer will make about 8% of trips. Also, after identifying the short activities trips and dividing these trips into separate trips, the share of trip without transfer increased by 7%. The transfer factor decreased by 0.04.
The automated special software for component testing of the satellite communication station
Authors: Drozd O V , Kapulin D V 
Published: February 2021

Abstract
Research tests of satellite communication station components are distinguished by a special variety of tasks to be solved, associated both with a wide range of components of the station, and a variety of estimated technical and functional characteristics. The whole set of characteristics can be subdivided into three categories: frequency and quality characteristics of components, operation parameters of the station and parameters of electromagnetic compatibility. These measurement operations of these parameters should be carried out using an automated measuring complex, which includes a measuring signal generator, vector spectrum, signal and network analyzers and operated under control of a specialized software. In the paper the architecture, logic algorithms and some application results of the software are shortly presented. The special software consists of the individual modules for control technical characteristics of low-noise and power amplifiers, cable assemblies, transceiver signal path element, and documenting the results. The program also includes modules that implement measurement instrumentation control used to assess the operational parameters and electromagnetic compatibility of the communication equipment. The developed specialized software allows automatically performing the entire cycle of operations related to the analysis of frequency and spectral characteristics, as well as quality characteristics of the devices under test in the automatic mode.
Ensuring priority of public urban passenger transport on urban road network
Authors: Fomin E V , Baklanova K V , Voevodin E V , Askhabov A M 
Published: February 2021

Abstract
Recently, in large and medium-sized cities, the increase in a load of highways is aggravated by the growth of motorization and the lack of development of the road network. An increase in the traffic intensity of vehicles to a critical level leads to an excess of the throughput of highways. The consequence is an increase in the level of road traffic delay. One of the most vulnerable groups is public urban mass passenger transport. This article discusses the methodology for determining the need to allocate a separate lane for the movement of public urban passenger transport on a given section of the road network. The purpose of this work is to identify patterns between the parameters of traffic flows and the parameters of the transportation program for public urban passenger transport, based on which criteria will be formulated for the need to allocate a separate lane for the movement of urban land transport on each separate section of the route network. For quality improvement of passenger transportation, a mathematical model has been developed, which is based on such indicators as the level of traffic delay and the share of the passenger flow in the total flow of traffic participants. Necessary conditions have been formulated, the strict implementation of which determines the need to ensure the priority of urban mass public transport on the considered section of the city’s road network. The resulting dependencies allow determining the need to ensure the priority of urban transport. The proposed model makes it possible to determine the rationality of the allocation of individual lanes, traffic for public transport following the level of traffic in the city’s road network. This study can become the basis for an algorithm for the operation of interactive signs that regulate traffic on a given stretch of the city’s road network.
Evaluation of the efficiency of the road network functioning
Authors: Gorbunov R N , Gorbunova Z V , Gorbunova L N , Kolchin V S , Karlina A I 
Published: February 2021

Abstract
Road transport has an impact to one degree or another on the life of every person. The article discusses approaches to assessing the costs caused by the deterioration of traffic conditions, which are subdivided into individual and social ones. Assessment of total costs should be carried out when adopting traffic management measures. The proposed approaches made it possible to estimate the individual costs caused by traffic management measures using the city of Irkutsk as an example.
Excavator implement for pipeline repair
Authors: Letopolsky A B , Korchagin P A , Teterina I A 
Published: February 2021

Abstract
The article presents an option to improve the design of the equipment of an excavator of the 3 dimensional group. The equipment is intended for selective repair of the pipeline by an excavator, without involving other road construction equipment (for example, a pipeline). The proposed version of the design of the working body allows you to increase the speed of repair of the pipeline, by reducing the time required to change equipment, its relocation, which as a result reduces the cost of repair work. The main idea is to supplement the main equipment of the excavator with a structure consisting of three teeth, forming, in conjunction with the bucket, a gripping mechanism. To confirm the operability of the proposed design, theoretical studies were carried out aimed at determining the stability of the machine for the most dangerous design operating positions, and the permissible sizes (pipe sizes) were established, with which the stability of the machine is maintained.
Use of subminiature eddy current transducers for composite inspection
Authors: Malikov V , Ishkov A , Katasonov A , Dmitriev S , Fadeev D , Sagalakov A , Grigorev A 
Published: February 2021

Abstract
The sensor for studying composite materials of the metal-polyethylene-metal type was developed on the basic of the designed ultra-miniature eddy-current transducer. The test of the developed sensor was carried out on standard defects of composite materials in the form of an inhomogeneity defect in the metal and (or) polyethylene layer. This sensor uses the original converter design, produced according to the differential circuit with the ability to localize the contact area of the sensor and the material up to 0.1-0.5 mm2. The measurement procedure for detecting defects in composite materials is also given in the article. The article presents the correlations of the output signal of the developed sensor based on the aluminum-polyethylene-aluminum composite material, in which the defect was located. We also obtained standard images of model defects of a composite such as a layered discontinuity. The images obtained as a result of processing information from the developed sensor make it possible to draw conclusions about the topology of the field near violations of the internal structure, the type of this violation and its localization in layers of material.
The upgrade of peen forming equipment for long-sized aircraft parts
Authors: Pashkov A E , Malashchenko A Y , Pashkov A A , Duk A A 
Published: February 2021

Abstract
This article represents an overview of the main design and technological features of equipment for peen forming and grinding of long-sized parts of the aviation industry. Since the end of the 80s of the XX century, the Federal State Budgetary Educational Institution of Higher Education INRTU has been working on the creation of equipment for the manufacture of large-sized panels and aircraft skins for the leading enterprises of the aviation industry of the Russian Federation. Totally there were 4 industrial units created, which proved their efficiency and competitiveness in the production process of TU-204, TU-334 and BE-200 aircrafts. Based on experience, a universal installation has been developed, which can be used as part of the equipment complex of the industry competence center for the shaping of large-sized aircraft parts.
Theoretical background of experimental methods for studying the influence of technical conditions of shock absorbers on lateral tire reactions
Authors: Tikhov-Tinnikov D A , Fedotov A I , Batzhargal N 
Published: February 2021

Abstract
The article studies the technical condition of shock absorbers which influences the occurrence of lateral reactions when the vehicle is passing through a single irregularity under the influence of lateral forces. The lateral reactions determine the properties of the directional and trajectory stability of the car. These properties allow us to consider lateral reactions as diagnostic parameters for the method of operational control of the technical condition of the suspension according to the stability criteria of the car. A mathematical model developed by the authors was applied. The model is based on the dynamics equations of the sprung and non-sprung masses, taking into account the technical condition of the shock absorbers. To describe the longitudinal and lateral reactions, the normalized slip function is used. The process of car movement around a circle was simulated with various parameters of the technical condition of the shock absorbers. Simulation results were processed using approximation and correlation analysis methods. The dependences of changes in the maximum value of lateral reactions on each wheel depending on the technical condition of shock absorbers were obtained. The presence of a strong correlation between the magnitude of the lateral reaction and the technical condition of its own shock absorber is established. Changing the technical condition of improper shock absorbers to a lesser extent affects the lateral reaction, but at the same time reduces the quality of diagnosis. Foundations of the method for conducting a road experiment were developed.
Integral criterion of the state of physical parameters of the surface layer of machine parts
Authors: Totay A V , Nagorkin M N 
Published: February 2021

Abstract
Exoelectronic emission, which is used as a non-destructive method for monitoring the parameters of the surface layer of parts, and the level of exoemission current from the machined surface, that is a complex criterion for the physical and chemical state of the metal have been studied. Correlations between the main parameters of the surface layer and exoemission are found.
Mathematical description of automobile headlight contamination when driving on a wet road
Authors: Vlasov V G , Fedotov A I , Gromalova V O , Gergenov S M 
Published: February 2021

Abstract
The article describes the process of contamination of automobile headlights in order to calculate contamination speed using a mathematical model. The authors published results of the study aimed at solving the problem of negative application of the CAIM (chemical anti-icing materials) on winter roads. In particular, it was found that when driving vehicles on winter roads covered with CAIM, the headlights become contaminated. The headlight contamination with dirty droplets from under the wheels of a vehicle ahead was analyzed. The detachment of droplets from the moving wheel and the path of droplets from the wheel to the headlights of the vehicle behind were analyzed and described. Process is studied of contaminant film formation which decreases light transmission was carried out. Road experiments were carried out. Along with the physicomathematical description of the process under consideration, they give new knowledge about headlight contamination depending on the vehicle speed. The mathematical model supplemented by the experimental study allows us to predict the rate of headlight contamination by the wheels of vehicles ahead when moving along roads covered with chemical anti-icing reagents depending on the speed and the distance between the vehicles.
Justification of the system parameters for alerting drivers about the emergency situation occurrence
Authors: Zeer V A , Grazhdantsev E V , Glukhikh R S , Avdeev R M , Elagin A I 
Published: February 2021

Abstract
The article analyzes the road traffic accident rate in Russia and the Krasnoyarsk territory. As a way to reduce traffic accident rate on road sections outside built-up areas, a system for alerting drivers in conditions of a lack of visual information about a possible emergency situation is proposed. The results of mathematical modeling and physical experiments are presented, which allow us to justify the values of the system parameters and algorithms for its functioning.
Modelling of the optimal height of the variable edge of a volumetric anti-filtration geotextile coating for restoring failed water supply structures
Authors: Bandurin M A , Bandurina I P , Vanzha V V , Pasnichenko P G , Tkachenko V T 
Published: February 2021

Abstract
This article presents the results of numerical modelling of the optimal height of the variable edge of a volumetric anti-filtration geotextile coating for the restoration of failed water supply structures. After a long period of operation, hydraulic structures continue to operate without scheduled repairs, so it is necessary to perform technical reconstruction of the structure on the basis of innovative, as well as previously proven repair technologies. Most of the long-term operated hydraulic structures in Russia are in unsatisfactory condition, requiring modernization and reconstruction. Volumetric anti-filtration geotextile coating is used for technical restoration of long-term water supply structures that have failed. The volumetric cellular structure is filled with soil and has a variable height of the edge from the ridge to the bottom of the slope. Operational reliability and durability of the volumetric coating are provided by a cellular structure with a variable ridge height, to eliminate the formation of landslides in the underlying soil and in the filling, as well as the loss of water for filtration. A solid-state model of the stress-strain state of a bulk anti-filtration geotextile coating was constructed. The number of elements and the number of units of the ensemble was 127830 and 102740, respectively. The source information was encoded in terms of the increment method, taking into account the fragmentary representation of a three-dimensional anti-filtration geotextile coating with a variable edge height in the form of simple geometric objects-plates. The work of the coating from the load from its own weight and filling the volume cells of the soil at various parameters was numerically modelled. The results obtained are adequate to the calculations and do not exceed the operational parameters of the design. Processing of the obtained simulation results showed the presence of minor displacements, both horizontally and vertically along the structure, which indicates the presence of a large margin of safety of the bulk anti-filtration geotextile coating.
Assessment of the adhesion strength of composite curved elements
Authors: Koryagin S I , Sharkov O V , Velikanov N L 
Published: February 2021

Abstract
Modern composites have good strength properties. But insufficient adhesive strength often leads to the delamination of a coating. The Poisson’s ratio, modulus of elasticity, and thermal coefficient of linear expansion are of particular importance among the characteristics of materials that determine different properties of the coating and metal. The ratio of metal and coating thicknesses is also important. The work suggests that the temperature deformations associated with the polymerization of a coating influence the process of delamination of the reinforced polymer coating. Evaluation of the potential of the proposed calculated dependencies was carried out according to the results of experiments. A polymer coating consisting of «Sprut-Plus» adhesive composition and a filler (T-11-GVS-9 glass fabric) was applied to a surface of St.3 steel. For experimental studies, the reinforced polymer coating was kept in water and machine oil for 100 days. The thickness of the coating was taken to be 10 mm, and the thickness of the metal - from 3 to 6 mm. Calculated and experimental dependences of radial stresses on the relative thickness of the polymer coating are obtained. An increase in radial stresses at the interface between the layers of the metal and the reinforced polymer coating after holding the composite material in water has been established; it does not exceed 10%. Analysis of the results showed that the destruction of the adhesive metal-polymer joint is more likely than that of the polymer-polymer adhesive joint. In addition, the radial stresses are at their maximum at the interfaces. Prospects for further research in this direction are associated with express methods of repairing metal structures of complex configuration. It is necessary to increase the efficiency and reliability of calculations of curved elements consisting of metal with a reinforced polymer coating. This can be achieved by a combination of experimental and theoretical research.