bluuebunny/crossref_metadata_2025 huggingface dataset:
A hybrid data mining model for Indonesian telematics SMEs empowerment
Authors: Tosida E T , Andria F , Wahyudin I , Widianto R , Ganda M , Lathif R R
Published: August 2019

The power of information technology and communication (telematics) is one of the vital forces for every country. In the Industrial Revolution 4.0 era, the development of telematics was one of the priorities of the Indonesian government nawacitas. The development of the field of telematics in Indonesia for a decade is inseparable from the role of SMEs. The role of telematics SMEs in the strength of national development can be mapped through the optimization of National Economic Census data (Susenas). The detailed 2016 Susenas data has not been released by BPS. Therefore, this research still uses 2006 Susenas data. The 2016 Susenas recapitalization shows that Indonesian telematics has a very large power, consisting of 2.6 million players. This great strength needs to be optimized to have high competitiveness so as to be able to support Indonesia’s development. The purpose of this study was to conduct hybrid data mining modeling to be used as a decision model in mapping the classification of Indonesian telematics SMEs. The classification map includes the feasibility of assistance for the empowerment of Indonesian telematics SMEs, business prospects and development plans for Indonesian telematics SMEs. The hybrid data mining model with K-Medoids & C4.5 technique shows better performance compared to other models, with an average accuracy rate of 71.87%. This model validation test also involves K-fold cross validations.
Development of data reconciliation system for billing process at PT Perusahaan Gas Negara
Authors: Hadianti R , Ihsan A , Mujiyanto A , Uttunggadewa S.
Published: August 2019

We study a problem faced by PT. Perusahaan Gas Negara (abbreviated as PGN), the Indonesian company in the natural gas transportation and distribution segment, in developing data reconciliation system for billing process. PGN serves its residential, commercial and industrial customers’ natural gas need through transmission pipelines. We focus our study on the billing process for industrial customers, where gas consumptions are measured by combining measurement results from turbine meter, temperature measurement device and pressure measurement device. Normally, customers’ bills can be obtained directly from volume metered by volume measurement device. But in every month there are a number of anomaly behaviour in customers’ gas consumption data or reports on meter failure, although statistically there are less than 1% of meter failure or anomaly behaviour from all customers’ data. Due to the large number of on-site meters which located in very wide area in Sumatera and Java islands, sometimes defective meter problems are already resolved after several days since the problem was reported/indicated, and this can generate loss for PGN. In this paper, we perform analysis to answer: 1. how to determine the beginning of the period where a volume meter is fail, 2. how to estimate gas volume delivered to the customers during the meter failure. The first problem is solved by analysing historical volume, temperature, and pressure data of each customer. The analysis results, in line with Spitzglass (Energy) Equation, that gas flow is linear to the pressure drop between the pressure at distribution pipe and the pressure at the customer’s pipe. We derive a procedure for detecting anomaly in gas volume data based on this phenomenon, where we reconcile the volume data and the pressure data and categorize the reconciled data into normal type or anomaly type data. The period during the meter failure is then determined as the period where the data in this period are of anomaly type. As soon as the period during the meter failure is determined, we then need to estimate the gas volume delivered during this period. We apply some forecasting methods for time series data such as AR(p) and Holt Winters models, and we choose the estimation from the forecasting model with the smallest error. The solution of those problems will be used for calculating bills for those customers which experience meter defective in the billing month. We develop a graphical user interface based on the anomaly detection method and the forecasting method. This system has been implemented, tested, and used by Energy Management Division of PGN, and will be developed into an energy management system.
Coral reef’s healthy level measurement system design using digital image processing on Bunaken National Sea Park
Authors: Rindengan A J , Pinontoan B , Latumakulita L A , Mongi C E , Montolalu C E J C , Langi Y A R
Published: August 2019

The existence of coral reefs have been beneficial for life of living things in the sea. However, their existence todays is threaten by some factors which can be seen from its color bleaching. This means that coral reefs’ level of healthy is decreasing. This is happening in Bunaken National Sea Park North Sulawesi, which is one of tourism destinations in Indonesia. Data used on this research is 40 reef images collected randomly from 10 diving spots around Bunaken. This research will design a system to analyse coral reefs’ healthy level using digital image analysis. Reef healthy observation is accomplished based on Coral Health Chart issued by coralwatch.org. Based on the chart, RGB average is calculated using digital image processing and applying least square method to obtain formula in determining coral reefs’ healthy level. Furthermore, the 40 coral reef images collected are classified based on regression equation obtained. This system is built in computer application system. Results show that application system using digital image to determine reef healthy level can be used. Healthy level of coral reefs in Bunaken National Sea Park is 72.8184%.
Rainfall prediction using backpropagation algorithm optimized by Broyden-Fletcher-Goldfarb-Shanno algorithm
Authors: Anam S
Published: August 2019

An extreme climate change results in a long dry season and an extreme rainfall results the losses in various areas of life. Rainfall prediction becomes an important thing for planning in many life sectors. Many prediction methods have been proposed, such as Autoregressive Integrated Moving Average (ARIMA) and Artificial Neural Networks (ANN). ANN has some advantages compared with the ARIMA model. Backpropagation algorithm is one of the ANN which has been successfully used in various fields. However, the performance of the backpropagation algorithm depends on the architecture and the optimization method used. The standard backpropagation algorithm optimized by gradient descent method works slowly to get a small error. The Broyden–Fletcher–Goldfarb–Shanno (BFGS) algorithm works faster than gradient descent method. For this reason, this paper proposes the rainfall prediction using the backpropagation algorithm optimized by the BFGS algorithm. From the experiment results, it can be shown that the backpropagation algorithm optimized by the BFGS algorithm gives better result compared with the standard backpropagation algorithm for rainfall prediction. The big number of neuron hidden causes overfitting and the small number of neuron hidden make the worst accuracy. Choosing the right learning rate will produce better accuracy.
A novel 3-D chaotic system with line equilibrium: dynamical analysis, coexisting attractors, offset boosting control and circuit design
Authors: Sambas A , Vaidyanathan S , Zhang S , Mujiarto  , Sukono  , Mamat M , Subiyanto
Published: August 2019

A 3-D new chaotic system with five nonlinearities is proposed in this paper. A novel feature of our chaotic system is that there is no linear term in it. We also show that the chaotic system consists of equilibrium points on the z-axis (line equilibrium) as well as two equilibrium points on the (x, y)-plane. The dynamical properties of the new chaotic system are described in terms of phase portraits, bifurcation diagram, Lyapunov exponents, coexisting attractors, coexisting bifurcation and offset boosting control. Finally, an electronic circuit realization of the new chaotic system is presented in detail to confirm the feasibility of the theoretical chaotic model.
Determination of the status of utilization and effort of little tuna (Euthynnus affinis) caught in the North Bolaang-Mongondow waters North Sulawesi
Authors: Kekenusa J S , Rondonuwu S B , Paendong M S
Published: August 2019

Little tuna (Euthynnus affinis) needs tobe managed well because even as a renewable natural resources, but can undergo depletion or extinction. One of the approach inthe management of the resources is by modelling. The analysis was performed aimingto get the best estimated for the surplus production model to determine the maximum sustainable yields (MSY), utilization level, and effort level of little tuna. The data of catch and fishing effort little tuna collected from the Marine and Fisheries Service of the North Bolaang-Mongondow Regency and the North Sulawesi Province. Best Surplus Production Model, which is used to assess the potential of little tuna is Schaefer Model. Optimal effort (E

msy
) of 482 trips per year, with catchesof optimal C

msy

465.13 tons per year. The effort level for 2017 is 114.10 %, which shows the inefficiency of effort, the utilization level of 125.99 %, showing occur overfishing.
Convergence of binomial tree methods to Black Scholes model on determining stock option prices
Authors: Riaman  , Parmikanti K , Irianingsih I , Joebaedi K , Supian S
Published: August 2019

There are many alternative investment tools that can be used to be the choice of investors. One of them is a derivative product. Derivative products that are more widely known and traded on financial markets are options. Option is a contract or agreement between two parties to buy or sell an instrument. To minimize risk, it is necessary to determine the option price by determining the fair price of the option. This option pricing can be done by using the Binomial Tree method and the Black Scholes method. Some factors that influence options are stock prices, strike prices, maturity, volatility, and interest rates. This paper discusses the European option pricing call on the shares of Bank Central Asia (BCA) with the Binomial Tree method and the Black Scholes Method. From the results of the research, it is found that the Binomial Tree method will converge to the Black Scholes method if the time partition increases.
Book embedding of 3-crossing-critical graphs with rational average degree between 3.5 and 4
Authors: Pinontoan B , Titaley J , Montolalu C E J C
Published: August 2019

We consider the graphs P(m, n) with average degree between 3.5 and 4, made up of m identical pieces together with n identical pieces glued together in a circular fashion, such that in any drawing of P(m, n) on the plane, there are exactly three pairwise edges crossings, and when deleting any edge of the graph, the number of crossings of the remaining graph decreases. We then embed P(m, n) into a book such that the vertices are put on a line called the spine and the edges are put on half-planes called the pages, which have the spine as their common boundary, without crossings. In this paper, we show that the minimal number of pages needed to embed P(m, n) into a book is three.
On model of supply chain using max-plus algebra
Authors: Putra D P W
Published: August 2019

Supply chain scheduling is used to manage the stability of the distribution of a commodity. In this paper, we will discuss the modelling of rice commodity supply chains using max-plus algebra. The rice distribution system data was obtained from the Yogyakarta Regional Logistics Bureau (Bulog) and its subsidiary company PT JPL. We get the supply chain model in the form of a matrix over max-plus algebra.
2-cut splicing and 4-cut splicing on DNA molecule
Authors: Aisah I , Jayanti P R E , Supriatna A K
Published: August 2019

Graph has many applications both in mathematics and various other disciplines especially to describe model problem. Graph can be used to describe the process of splicing system in DNA molecule. Splicing system is a mathematical model of the system in the action of restriction enzyme in DNA molecule. Splicing language is a language constructed by splicing system. In this paper we discussed about 2 cut splicing and 4 cut splicing on DNA molecule. It had been recognized that at the time of splicing, the graph takes the semi graph structure and it generates the words which leads to the Parikh concepts. Since a DNA which consist of (A, C,G,T) can be seen as a word, thus the modelling can be done within the framework of formal language theory. After the splicing process, the main element of the DNA molecule is mapped into the binary alphabet (a,b). The language formed from the binary alphabet is mapped into a matrix form.
Inhibition of interleukin-8 production in interleukin-1 stimulated human monocytic THP-1 cells by N,N didesmethylgrossularine-1 obtained from an Ascidian Polycarpa aurata collected in North Sulawesi
Authors: Sumilat D A , Oda T , Wewengkang D S , Namikoshi M , Yamazaki H
Published: August 2019

N,N-Didesmethylgrossularine-1 (DDMG-1) has a rare β-carboline structure and was isolated from an Indonesian ascidianPolycarpa aurataas an active component against tumor necrosis factor (TNF)α production in lipopolysaccharine (LPS)-stimulated murine macrophase-like RAW 264.7 cells as reported in our previous paper. Further investigation on the inhibitory activity of DDMG-1 against the production of inflammatory cytokines in human monocytic THP-1 cells, we found that DDMG-1 reduced the excess production of IL-8 in LPS- stimulated THP-1 cells through inhibition of the mRNA level of IL-8 1κB-α degradation, and binding of NF-xfi to the target DNA site. The THP-1 cells used in this study showed the high production of IL-8 by the stimulation with TNF-α, IL-1β, and 12-O-tetradecanoylphorbol-13-acetate (PMA) as similar to LPS. DDMG-1 inhibited the IL-8 production in IL-1β-stimulated THP-1 cells but did not show an inhibitory activity in the cells stimulated by TNF-α and PMA. Therefore, DDMG-1 was specific to the IL-1β signalling pathway. These results suggested that DDMG-1 could be a useful drug candidate lead compound to control the excess production of IL-8.
Antihyperglicemic capacity of basil (Ocimum basilicum L.) leaves extracts coated with the marine fish scales derived nanochitosan
Authors: Rumengan I F M , Mandey L , Citraningtiyas G , Luntungan A H
Published: August 2019

Basil (Ocimum basillicum L.) is well-known as a medicinal plant and culinary herb because of its phytochemical contents. Crude extracts of basil leaves are of particular interest for health benefits, including in reducing blood glucose level. Nanochitosan is potentially applied to increase the efficacy of phytopharmaceuticals due to its low viscosity that easily absorbed by the tissues. This study was conducted to evaluate the antihyperglicemic capacity of basil leaf extracts when coated with nanochitosan. Nanochitosan was prepared from the parrot fish (Scarus sp) scales derived Chitosan by using the gelatin ionic method. Both chitosan and nanochitosan were characterized by Fourier Transform Infrared Spectroscopy (FTIR), SEM, particle sizing and heavy metals analyses. Extraction of basil leaves were performed by a maceration method using ethanol 96% and the extract was evaporated. Nanochitosan was then applied as coatings of the extracts, and the nanochitosan coated extract was separated from the solution by centrifugation. In vivo assay was applied using 24 male rats, which divided into extract treated groups and the control groups. All the animals were fasted for 12 h, but were allowed free access to water, before commencement of the experiments. Hyperglycemia condition was induced by a single intraperitoneal dose of 120 mg/kg. The rats were fasted for 12 h and blood was taken from the tail artery of the rats. The extract of basil leaves at the dose of 400, 800, 1000 mg/kgBW significantly lowered blood glucose level (P<0,05) of rat in hyperglycemic after 5 hours of extract administration. The efficacy of antihypeglicemic dose of basil leaves extracts coated with nanochitosan was found to be 400 mg/kgBW. Based on the result of the study, it is suggested that nanochitosan could increase the efficacy of phytopharmaceuticals.
Growth response of rotifers on a bacterial-based diet made from fishwastes
Authors: Wullur S , Ginting E L , Waraow V , Rumengan I F M , Ogello E O , Hagiwara A
Published: August 2019

Fishwastes are potential low-cost diet sources for replacing microalgae, which is the popular diet for rotifers. Growth responses of rotifer were tested under different weights of the diet (i.e. 0.05, 0.1, 0.2 and 0.4 g/L), different culture containers (i.e. using small tall (ST), small-short (SS), medium-tall (MT) and large-short (LS) containers), different initial densities of the rotifer (i.e. 10, 50 and 200 rotifers/mL) and mass cultured trials for 15 and 30 days. Population densities of rotifers increased significantly (ANOVA, p=0.001) when providing 0.1 to 0.4 gr/L than those fed 0.05 gr/L of the diet (Tukey HSD test, p<0.05). The densities also were significantly higher (ANOVA, p=0.001) when cultured using larger containers (LS and MT) than using smaller containers (ST, SS) (Tukey HSD test, p<0.05), but it was not significant when inoculated at different initial densities (ANOVA, p>0.05). The rotifers were successfully mass cultured for 30 days and were successfully harvested for 7 times at densities of about 2500 to 3300 ind./mL.
Supplier evaluation and order allocation using fuzzy analytical hierarchy process and augmented epsilon constraint methods
Authors: Farizal  , Dewi R M , Gabriel D S
Published: August 2019

Environmental issues nowadays affect the way to run business. These issues push firms to have effective and efficient green supply chain management. One of critical aspect in green supply chain management is green supplier selection. Choosing suitable supplier is an important part in procurement activity. Almost 70% of the total production cost is derived from raw material purchasing cost. This research proposes two phase meta-model for supplier selection and order allocation that takes into consideration environmental criteria besides traditional criteria such as quality, cost and delivery. For the purpose, fuzzy set and analytical hierarchical process (AHP) were combined. AHP was used to allow uncertainties and vagueness due to human decision making and subjective criteria. For order allocation phase, multi-objective mathematical programming method (MOMP), the augmented ε-constraint (AUGMECON) method was used to find Pareto optimal solutions for multiple sourcing. These proposed methods were tested in one of tire manufacturing company in Indonesia. The results show that the methods gave a 0.16% of the total cost lower than the existing one as addition to fulfilling green criteria.
Chemical characteristics of tuna fish bakasang
Authors: Fatimah F , Pelealu J J , Gugule S , Korompot A R H , Monintja V W , Tallei T E , Rorong J A
Published: August 2019

Fish viscera are wastes produced by fish processing that have high potential as sources of biomolecules such as proteins and lipids. One of the fermented products in Indonesia that uses fish viscera as its raw material is bakasang. This study aims to determine the content the chemical characteristics of bakasang made from Tuna fish viscera under various fermentation condition. The chemical characteristics assessed included free fatty acid (FFA), peroxide value (PV), and thiobarbituric acid (TBA, which is expressed in malondialdehyde/MDA) of the bakasang product. Tuna (Thunnus sp.) fish viscera were fermented under the following conditions: temperature 50 and 70°C, for 10 and 15 days with the addition of 20 and 30%. The results showed that tuna fish bakasang processed at a temperature of 50-70°C with salt content of 20-30%, had the following chemical characteristics: FFA = 3.84.4%, PV = 2.8-10.5%, MDA = 0.35-1.15 g / 100g sample. These results indicated that bakasang tuna fish processed under the above conditions have good chemical characteristics.
The potency of drug reconciliation need on elderly diabetic patient at Kandou Hospital Manado
Authors: Citraningtyas G , Wiyono W I , Lolo W A
Published: August 2019

Drug reconciliation is needed on Diabetic Mellitus patient, specially geriatry patient. North Sulawesi include in 17 provinces with high Diabetic Mellitus prevalence in Indonesia, so drug reconciliation is needed. The aim of this research is to identify the potency of drug need reconciliation on ederly Diabetic Mellitus patient. This research method was divided into two stages to identify treatment discrepancies in elderly DM patients who left the Kandou Hospital. The second stage is a qualitative descriptive study with in-depth interviews with patients including perception, choice tendency and patient willingness to pay for drug reconciliation services. Interviews were done on health service staff about perception, tendency of choice and willingness of service providers to be paid for the implementation of drug reconciliation. The results of the study included 11 intentional discrepancies from 32 patients. The most accidental nonconformity in the form of omission medication was 28.12%. Patients don’t know about drug reconciliation and service providers don’t know about drug reconciliation. All the parties support drug reconciliation service. Drug reconciliation has the potential to be implemented in Manado, especially in Kandow Hospital as a referral center.
A simple low-cost video-based surveillance system for a flash flood warning system
Authors: Mosey H I R , Pandara D P , Bobanto M D , Sangian H S
Published: August 2019

Flash flood is the most common and frequent natural disasters worldwide and can cause a loss of life and damage to property and the environment. In 2014, Manado city has experienced the most devastating flood that caused 19 people died, 10,884 homes destroyed, 2,091 people became homeless and estimated an economic loss of US$ 124 million. The huge loss was caused by the people and government did not receive information about water level rising on the watershed of the Tondano River. In conventional, decision maker needs the precipitation data and critical threshold value to issue the evacuation. There is an urgent requirement for end-to-end solution where the flash flood early warning system (FEWS) which can processed data in real-time can be integrated with Video-Based Surveillance System to take a role in saving peoples life. The aim of this study was to create a stand-alone system (Sensor Node) that could be placed on the watershed to monitor the water level rising using a microcomputer, a camera and a distance sensor. The aim of the system proposed was to measure the water level rising and when the threshold value was reached, the system would capture and display a real-time video. Future research can be done to “go-live” and posted the captured real-time video on the YouTube or Facebook in which people used them widely as a social media
Comparison of hierarchical clustering methods (case study: data on poverty influence in North Sulawesi)
Authors: Mongi C E , Langi Y A R , Montolalu C E J C , Nainggolan N
Published: August 2019

Grouping of Large data has been carried out in various fields. One method for grouping is cluster analysis where this method consists of hierarchy and non-hierarchy method. The aim of this study was to compare the use of cluster analysis on aspects of the causes of poverty data. The method used is agglomerative hierarchical clustering, that is, the average linkage, centroid methods and ward methods. The results obtained are compared with the RMSSTD value and the smallest value is the ward method with a value of 2.0937. So the ward method is good for this case.
Comparative assessment of extraction methods of 3,4- benzopyrene from soils, bottom sediments and sewage sludge
Authors: Ahmadiev G M
Published: August 2019

Annotation

The article is devoted to the scientific basis and principles of extraction methods of extraction of 3,4- benzopyrene (B(a)P) from soils, bottom sediments and sewage sludge, which can be used in monitoring studies, particularly in assessing the impact on the environment; in assessing the degradation changes in the soil; in monitoring the state of soils, as well as in assessing the natural and disturbed ecosystems from human activity in general; in the environmental regulation of soil pollution and other degradation processes. The data obtained may be useful in the development of environmental maps of priority pollutants. The results of studies of 3,4- B(a)P from soils, B(a)P sediments and sewage sludge can be used for zoning, actual and forecast parameters; in forecasting the environmental consequences of economic activity in the area; in assessing the risk of disasters; in assessing the feasibility and effectiveness of soil remediation contaminated with oil and petroleum products, during the environmental assessment, certification, certification of the territory or economic object of industrial and construction, industrial and transport, agro-industrial and industrial and commercial complexes.
Ultrasonic method for measuring of gas bubbles in liquids
Authors: Al-Umari I H A , Kashapov N F , Saitkulov V G , Fazlyyyakhmatov M
Published: August 2019

The paper proposes to use an ultrasonic method to measure the content of gas bubbles in liquids. The task is relevant in various applications. Industrial ultrasonic analyzer STOK-101 was used to implement the method.
Study of the real work of constructions of translucent facade systems
Authors: Antonov A S , Shmelev G N , Sabitov L S , Kashapov N F , Galimullin I A
Published: August 2019

The issues of actual operation of structures, the most common stay-brace-and-cross-beam translucent facade systems used in the fencing of buildings and structures are studied, taking into account the spatial rigidity of the elements of the system. The existing building codes of the Russian Federation, in the absence of specialized methods for calculating such systems, offer static calculation schemes for the supporting frame without taking into account the other elements of the system, including the translucent modules themselves, which do not take into account the behavior of the actual structure and often leads to an increase in the cross section of the bearing elements and their value. Thus, in order to study the actual work and bearing capacity of the structures of translucent facade systems, numerical and experimental tests were carried out with modeling of the actual operating conditions, studies were performed for a fragment of the facade system, the stress-strain state of the system structures was analyzed taking into account their spatial work. Results were obtained on the actual operation of the structures, and behavioral features were revealed under the action of critical forces, which must be taken into account when further calculating and designing such systems.
The use of technogenic dispersed waste engineering to obtain compact forms of graphite in the materials of the system Fe-C-Al
Authors: Bikulov R
Published: August 2019

Currently, the significant problem of domestic engineering is to improve the quality level of products based on efficient resource-saving technologies. In the paper the main emphasis has been placed on using in such a significant procurement industry of engineering, which is foundry, dispersed iron-containing with a different degree of oxidation of the designated waste element. Moreover, this use of waste is proposed to carry out both at the stage of preparation of the melt for blanks, and in the manufacture of a mold. We are talking about blanks of materials based on the system Fe-C-Al, the quality of which is largely determined by the shape of graphite inclusions.
Disadvantages of the selective laser sintering technology in the manufacture models for investment casting
Authors: Dementyeva J N , Kashapov R N , Kashapov N F , Kashapov L N
Published: August 2019

Annotation

Preparation of production and development of new science-intensive products is a complex and time-consuming process, including the creation of product models for carrying out a series of experimental studies to refine computational models, and then manufacturing the necessary technological equipment. The use of digital production technologies can reduce the laboriousness of this process. The technology of selective laser sintering eliminates the need for the design and manufacture of casting equipment. This paper presents an analysis of the difficulties encountered when using the SLS process for the manufacture of polystyrene smelted models.
Mathematical modeling of heat treatment of three-layered material
Authors: Fedyaev V L , Khaliulin V I , Belyaev A V , Faskhutdinov M Kh
Published: August 2019

The paper presents mathematical models of the thermal behavior of the three-layered material in the presence of a thin air gap between the two of them. Both convective and radiative-convective heat transfers with the environment are considered. As a result of an acceptance of a set of assumptions, the relationships to estimate the change of the material temperature in the layers over time were found for each of these cases.
Study of laser cutting of copper and copper alloys
Authors: Gabdrakhmanov Az T , Israphilov I H , Shafigullin L N , Gabdrakhmanova T F
Published: August 2019

The processes of interaction of laser radiation with a surface layer of copper under laser irradiation, as well as the main factors affecting the absorption capacity of copper during surface treatment with a laser beam, are considered.
Technologies for producing heat-conducting carbon foams by method of pitches carbonization under pressure
Authors: Galimov E R , Sharafutdinova E E , Galimova N Ya , Murataev F I , Samoylov V M , Danilov E A
Published: August 2019

Technology for producing syntactic carbon foams by the method of pitches carbonization under pressure is proposed. The components and optimal regime parameters for producing the foams with given thermophysical and strength characteristics are determined. The foams structure was studied using scanning electron microscopy.
Improving the efficiency of shaving through the use of wear-resistant coatings
Authors: Gilman V N , Balabanov I P , Faskhutdinov A I
Published: August 2019

The influence of the preparation and use of various types of wear-resistant coatings on the tool shaver of high-speed steel R6M5K5 with a hardness of 60-65HRc for shavinging parts such as gear driven made of steel 20HGNMTA with a hardness of 160-210 HB. The use of hydroabrasive cleaning with ceramic balls made it possible to obtain a clean surface with a rounding of the cutting edge to 7 microns. For the analysis of durability, coatings based on titanium nitride (TiN) and a multi-component coating of titanium and aluminum (AlTiN) were used. The coating on the basis of titanium nitride (TiN) increased the resistance 1.35 times. Multi-component coating of titanium and aluminum (AlTiN) increased resistance 1.61 (AlTiN) times.
Use of modified molecular sieves in mechanical filters
Authors: Karataev O R , Novikov V F , Karataeva E S , Kartashova A A
Published: August 2019

This article discusses the use of modified molecular sieves in mechanical filters of water treatment plants and the separation of the gas mixture, as they have sorbing properties to all heavy metals. The main indicators of the quality of separation is the adsorption isotherm, which demonstrates the structure of the adsorbent, the thermal effect of separation and a number of other physical,chemical and technological characteristics. System analysis of technological parameters of mechanical filters increases the operational period of equipment.
Development of turning-filtering mechanismof centrifuges
Authors: Karataeva E S , Lashkov V A , Brodt A A , Akhlyamov M N
Published: August 2019

Analysis of the literature revealed a lack of filtering centrifuges, which include the difficulty of regenerating the filtering surface. The presented constructive solutions for its elimination provide only local, but not complete regeneration of the filtering surface. The authors investigated the regeneration of filter elements when the blades rotate around the axis as a result of the engagement of parts of the rotary device. In order to exclude shock loads in the process of turning, various cam designs are considered, the best of which is a fork cam.
Automation of process of manufacturing products from a mixture of fluids fast polymerized in air using the jet centrifugal method
Authors: Karikh F G , Shafigullin L N
Published: August 2019

The developed method provides the extraction of each component from the transported agents into flexible vessels followed by blending in a dosing unit, mixing in a static mixer, spraying the mixture on the surface of ellipsoidal drums, while ensuring the required thickness of the gel coating transported to the line of formation.
Description of a complex technical system of urban electric transport from the standpoint of synergistic methodology
Authors: Kashapov N F , Sabitov L S , Auhadeev A E , Litvienko R S , Gatiyatov I Z
Published: August 2019

City electric transport is considered from the standpoint of a synergistic methodology in order to search for modern approaches to solving the actual problem of increasing its efficiency. The properties of the urban electric transport system are identified in their unity and interdependence in terms of synergetics. Methodological interpretations of these properties from the standpoint of an actually existing system of urban electric transport will allow determining its theoretical synergetic model.
Consideration of the influence of the reliability of elements of the urban electric transport system on its bandwidth
Authors: Kashapov N F , Sabitov L S , Litvinenko R S , Auhadeev A E , Pavlov P P
Published: August 2019

The article proposes an approach to assessing the capacity of urban electric transport, which is one of the criteria for a stable resource supply of electric traction, taking into account the reliability of the elements of its infrastructure. By introducing the operational readiness factor as an indicator of reliability, the researcher has the opportunity to assess the impact of failures of these components on the efficiency of the electric traction process, as well as to compare the compliance of the transport line infrastructure with the characteristics of the rolling stock used.
The effect of tillage with various tools on its agrophysical and agrochemical properties
Authors: Kashapov N F , Nafikov M M , Nigmatzyanov A R , Medvedev V V
Published: August 2019

When analyzing agricultural equipment for tillage and technology, it is observed that despite the introduction of conservation farming technologies (zero, ridge, strip and other methods of tillage), the mechanical method remains prevailing, taking into account the diversity of soil conditions in various soils. - climatic zones of the Russian Federation, the presence of plain, slope and contour farming, the need to combat erosion and preserve its agrophysical and agrochemical properties.
Influence of application of robotic systems on prospects and directions of development of electroerosive processings
Authors: Khafizov I I , Nurullin I G , Kashapov N F
Published: August 2019

Application of robotization in production is necessary for achievement of the required quality of products. Use of the industrial robot gives an unlimited range of opportunities on processings of preparations. The robotic system can be applied without readjustment to auxiliary operations.
Electric motor with electronic control unit for changing the polarity of the winding to improve reliability and energy efficiency
Authors: Khafizov A A , Akhmetshin R S , Shakirov Yu I
Published: August 2019

A technical solution is proposed that increases the motor life, reliability and energy efficiency of the DC motor by replacing the plate collector with ring ones and introducing an electronic control unit for changing the polarity of the winding.
Operation of brushes with increased service life on traction machines of electric vehicles
Authors: Khusnutdinov A N , Khusnutdinova E M , Butakov B M
Published: August 2019

The paper describes how to use a split brush with increased service life. Serial brushes were compared with those proposed by design, reliability and cost characteristics. The authors propose a method of how to improve the design of serial brushes and demonstrate a dynamic performance curve.
Issues related to energy saving in petrochemical sector and methods for their solution
Authors: Khusnutdinova E M , Konakhina I A , Khamidullina G R
Published: August 2019

The paper describes the case study of energy saving problems in the petrochemical sector and discusses methods of recovery of low-grade renewable energy resources and approaches to assessing their potential use.
The study of the insulating properties of a new material based on straw and isoprene rubber C-nitrous vulcanization
Authors: Klyuchnikov O R , Martianov N A , Kiyamov I K , Sabitov L S , Morozov D A , Gilmanshin I R
Published: August 2019

Research has been carried out on the thermal insulation properties of a new composite material based on straw and synthetic rubber of low-temperature vulcanization. The values of heat transfer resistance (Rcp) and thermal conductivity coefficient (λ) are determined depending on the humidity of the environment.
Comparative analysis of friction losses in long pipelines with profiled channel flow area
Authors: Konakhina I A , Khusnutdinova E M , Khamidullina G R , Vachagina E K
Published: August 2019

The paper discusses the matter of how friction losses change in long pipelines with profiled channel flow area and describes the method of calculating the reduction of friction losses. The reduction of friction losses in the pipeline components has been analyzed.
Engineering education in the system of modern innovation
Authors: Konakhina I A , Khamidullina G R , Khusnutdinova E M , Kashapov N F
Published: August 2019

The paper discusses and reviews key issues of engineering education development as one of the most important component of modern innovative activity in the Russian Federation. The discussion is based on the example of modern educational technologies used in the Institute of Engineering at Kazan Federal University.
Machine elements evaluation diagnostic devices development using compressed air on crankshaft bearings example
Authors: Kulakov A T , Barylnikova E P , Kulakov A O
Published: August 2019

Devices for diagnosing the degree of wear of crankshaft bearings, suitable for embedding in the on-board system for diagnosing a vehicle during its operation have been developed.
Modifying surface properties of polyamide powders for selective laser sintering
Authors: Lyakhovich A M , Kashapov R N , Kashapov N F , Kashapov L N
Published: August 2019

Annotation

The purpose of this work was determination of the changes in surface properties of Polyamide-12 powder used in Selective Laser Sintering (SLS). The powders of original polyamide Duraform PAtm (3D Systems) were investigated. Also the powders remaining around the product after the sintering process were investigated. The difference in the chemical structure of the Polyamide-12 powder surface layers has been established. The reason is the increased content of oxygen-containing groups in the surface layers. To a greater extent, this difference was revealed for powders left after sintering and intended for reuse. Aliphatic chains are subject to oxidative degradation in the surface layers of the original powder. In the powder remaining after sintering, terminal carbonyl and amine groups are subject to oxidative degradation.
Features of very heavy crude oil transportation
Authors: Mamonova A O , Plugatyreva O A , Khusnutdinova E M , Khusnutdinov A N
Published: August 2019

The paper discusses the features of very heavy crude oil transportation in pipelines as exemplified by foreign transportation techniques. Special focus is given on the processes of rheologically complex behavior of waxy crude oils.
Modified gypsum-cement-pozzolanic composites reinforced with polypropylene fibers
Authors: Mukhametrakhimov R Kh , Galautdinov A R , Gilmanshin I R
Published: August 2019

The paper shows the effectiveness of the use of a polyfunctional complex modifier for a gypsum-cement-pozzolanic binder (GCPB), which allows reducing the water requirement of the mixture by 35%, increasing the flexural strength of gypsum-cement-pozzolanic composites (GPPC) by 28%, and 25% for compression. The results of experimental studies of the effect of polypropylene fibers on the basic physicomechanical properties of a central processing center are presented. The performed studies have shown high efficiency of polypropylene fibers of the type VSM-II-6 for dispersed reinforcement of the central industrial park. The maximum increases in the values of the flexural strength (by 41.2%) and compression (by 20%) are achieved with their volume content in the amount of 1%. It should be noted that the introduction of the studied fibers with a length of more than 6 mm did not lead to the expected result, which is due to the formation of a heterogeneous structure of the GPPC
Ranking materials technologies by limiting characteristics of heat-resistant alloys and their longevity in the problems of import substitution
Authors: Murataev F I , Galimov E R , Galimova N Ya
Published: August 2019

The structural strength properties determined by the true stress-deformation diagram and the fatigue characteristics of materials at combined action (tension and bending) under the conditions of temperature change are used to substantiate materials and technologies. The domestic alloy is suggested as an alternative to imported heat-resistant alloy IN-738LC used to manufacture the turbine rotor blades of stationary gas turbine plants (GTP). Expressions to determine the fatigue characteristics according to the criteria of structure stability are presented.
Substantiation of domestic material and welding technology for improving properties and competitiveness of pyrolysis furnace coils
Authors: Murataev F I , Galimov E R , Galimova N Ya
Published: August 2019

An alloy of cast pipes produced in the Russian Federation and a welding method for restoring coil sections made of imported pipes damaged by gas corrosion in pyrolysis furnaces are proposed. Substantiation of the alloy choice is carried out according to the research results of composition and structure of the metal of the original pipes and according to the criteria of structural strength using a proven diagram of controlled damageability. Recommendations for optimizing the composition, microalloying, and structure of the proposed alloy of thick-walled cast pipes for the elimination of the deficiencies identified by the research are presented. The alloy advantages by mechanical properties in the temperature range up to 800…890°C are shown on samples of an experimental cast pipe.
Improving the quality of castings made of non-ferrous metal alloys when casting in metal molds
Authors: Pankratov D L , Gavariev R V
Published: August 2019

The article deals with the quality of castings of zinc and aluminum alloys made by means of casting under pressure. The study identifies causes of defects in the outer surface and their influence on the roughness of the castings. The connection between the working surface of the mold and the roughness of the obtained castings is determined. The relationship between operation life of molds and the roughness of the castings is shown. The solution which increases the operational stability of molds as well as the quality of the surface of castings is proposed.
Investigation and explanation of mathematical tooling for accounting non-economic characteristics during the investment project effectiveness’ assessing process
Authors: Puryaev A S , Puryaeva Zh A , Kharisova A R , Puryaev A A
Published: August 2019

In this work we briefly present the study results of the issue of accounting and implementation of specific mathematical tooling for non-economic characteristics in evaluating of projects’ effectiveness. There is established classification of events in which using of one or another mathematical apparatus during solving the question of accounting for non-economic characteristics can be observed. It is proposed to study the classification of non-economic characteristics easily formalized and difficult to formalize (parameters) that are used when assessing the effectiveness of projects. There is explained and recommended a certain mathematical tooling for the process of accounting for non-economic characteristics in the assessment on the basis of classification under description.
To determination of dependence of parameters of surface cracks in concrete and reinforced concrete volume elements
Authors: Radaikin O V , Sabitov L S , KIyamov I K , Kashapov N F
Published: August 2019

To determine the dependences of the parameters of surface non-through cracks, the problem of tensile bulk concrete elements (in the form of prisms) was considered. One group of elements contained a crack normal to tensile forces, and the other was inclined (the problem was modeled using the finite element method in the Ansys software package). The stress intensity factors of three types were determined, for which a macro (subroutine) was written in the APDL language, the calculated coefficients of the 2nd and 3rd type (KI, KII) were used for the first time in the considered problems. On the basis of these coefficients, relations between the length, width of the opening, the penetration of cracks are established, the boundaries of the pre-fracture zone are found, and the residual bearing capacity of the elements with a crack is estimated. It is shown that the stress relief area around the crack has a diamond shape. The dependences obtained and the procedure for obtaining the numerical values of KI abd KII constitute a scientific novelty.
To estimate the rigidity of bending reinforced concrete elements based on dependence of length macro trays from load
Authors: Radaikin O V , Sharafutdinov L A , Sabitov L S , Strelkov Yu M , Kashapov N F
Published: August 2019

The purpose of this work is to make proposals for calculating the stiffness of normal sections of bending reinforced concrete elements, taking into account the work of the stretched concrete above the macrocrack and stress concentration at its top. In the article, such an account is made by the methods of fracture mechanics using the stress intensity factor KI
. One of the stages of calculation consists in the finite-element modeling of macrocracks in ANSYS.
To determination of dependence of parameters of surface cracks in concrete and low-armed wall panels
Authors: Radaikin O V , Sabitov L S , Kiyamov I K , Kashapov N F
Published: August 2019

The dependences between the parameters of non-through normal cracks in the wall “perpendicular plates” panel method were established. The residual carrying capacity of the panel and the size of the pre-fracture zone at the crack tip were determined. The dependences obtained and the proposed method for calculating wall panels constitute a scientific novelty.
Bevel gears monitoring methods developmentin the total contact patch terms
Authors: Safarov D T , Kondrashov A G
Published: August 2019

The article describes the main provisions of the method, which allows to perform the control of the gear rims of bevel gears according to the shape and relative position of the total contact patch. In comparison with the standard, the developed method allows to evaluate the conformity of the teeth of the ring gear with its considerable displacements relative to the calculated point of the gear transmission.