bluuebunny/crossref_metadata_2025_split huggingface dataset:
Procedure for constructing a mathematical model to determine the time of the initial stage of fire evolution
Authors: Zhartovskyi Sergii , Titenko Olexander , Kyrychenko Oksana , Tyshchenko Ievgen , Motrichuk Roman , Melnyk Valentyn 
Published: March 2021

To develop appropriate measures and means of fire protection at facilities, it is relevant to form an idea of the phenomenology of the processes of the occurrence, evolution, and termination of combustion. This paper proposes procedures for building mathematical models of the energy component of those physicochemical processes that occur in wood under the influence of fire, which make it possible to determine the time from the beginning of such an impact to the onset of the phase of flame combustion. The adequacy of mathematical modeling was tested experimentally at a standardized installation for studying flame propagation over the surface of wood. The samples used for the reported theoretical and experimental studies were the specimens of unprotected wood made from 20-mm-thick pine sapwood with a density of 400‒550 kg/m3. The samples of fireproof wood (of the same variety, thickness, and density) were impregnated with a fire retardant based on diammonium phosphate and ammonium sulfate (at consumption of 168.2 g/m2 of dry fire-retardant components). The modeling employed the results from the experimental determining of the ignition temperature of unprotected and fire-proof wood, specifically: 235 °C – for unprotected wood, 410 °C – for fire-proof wood, respectively.
The results of mathematical modeling and experimental studies confirm the possibility of significant lengthening of time from the onset of fire exposure to the ignition of fire load from wood when nitrogen-phosphorus impregnating agents are used for fire protection.
Procedures of mathematical modeling have been proposed to build models for determining the cooling effect from the use of impregnating fire retardants to protect the wood on the prolongation of the stage of a fire start.
Mathematical modeling data could be applied when making impregnating fire retardants
Development of a method of adaptive control of military radio network parameters
Authors: Nalapko Oleksii , Shyshatskyi Andrii , Ostapchuk Viktor , Mahdi Qasim Abbood , Zhyvotovskyi Ruslan , Petruk Serhii , Lebed Yevgen , Diachenko Serhii , Velychko Vira , Poliak Illia 
Published: March 2021

A method of adaptive control of military radio network parameters has been developed. This method allows predicting suppressed frequencies by electronic warfare devices, determining the topology of the military radio network. Also, this method allows determining rational routes of information transmission and operating mode of radio communications. Forecasting of the electronic environment is characterized by recirculation of input data for one count, resampling on a logarithmic time scale, finding a forecast for the maximum value of entropy and resampling the forecast on the exponential time scale. The developed method allows choosing a rational network topology. The choice of topology of the military radio communication system is based on the method of ant multi-colony system. The main idea of the new option of ant colony optimization is that instead of one colony of the traditional ant algorithm several colonies are used that work together in a common search space. However, this procedure additionally takes into account the type of a priori uncertainty and the evaporation coefficient of the pheromone level. The proposed method allows choosing a rational route for information transmission. The proposed procedure is based on an improved DSR algorithm. This method uses several operating modes of radio communications, namely the technology of multi-antenna systems with noise-like signals, with pseudo-random adjustment of the operating frequency and with orthogonal frequency multiplexing. The developed method provides a gain of 10‒16 % compared to conventional management approaches
Comparative assessment of the influence of a technological factor on economic growth
Authors: Kheyfets Boris , Chernova Veronika 
Published: March 2021

The study focuses on the extent to which the technological factor affects economic growth and analyzes its role in enhancing socio-economic differentiation. We develop a methodology for ranking countries according to the level of their technological effectiveness using the specific index. Correlation and regression analysis is used to identify technological factors in economic development. Approbation of the approach took place on the example of the United States and China. The data obtained demonstrate that the increase in R&D costs and the export of high-tech products has a positive effect on economic growth. R&D spending provides 31.6 % to 41.9 % of GDP growth for the United States and China, respectively. Exports of high-tech products support GDP growth at the level of 2.7 % to 4.7 %. The research findings confirm that the technological factor encourages economic development through more efficient allocation of resources, the spread of innovations and the growth of high-tech exports. Regression models have proved this relationship. China ranks first in the index of technological effectiveness and is followed by the United States and Japan. Such countries as Kazakhstan, Brazil and Ukraine are lagging significantly behind some technologically advanced European nations (Romania, Poland, Bulgaria), as well as Turkey and Mexico. Analysis of data from a sample of 30 countries showed that technological differentiation is a direct cause of overall inequality. To bridge this technological gap, it is expedient to develop the existing technological potential in a consistent manner, while concentrating efforts on high-tech sectors capable of strengthening the foundation of the economy
Reinforcement of Maja Labo Dahu (shame and fear) attitude in practicing pancasila value through the learning of pancasila and civic education in State Madrasah Tsanawiyah (MTSN) 1 Bima city
Authors: Irawan Bambang , Kusdarini Eny 
Published: March 2021

This type of research is descriptive research by qualitative approach about the reinforcement of maja labo dahu attitude in practicing Pancasila value through the learning of Pancasila and civic education in MTsN 1 Bima City. The technique of determining the subject research used purposive sampling with the source of data is 1) teacher of Pancasila and civic education, 2) student representatives, 3) curriculum representative, 4) coach of extracurricular activity, 5) principal and, 6) students. Data collection is conducted by observation, documentation and interview. The test validity is conducted by triangulation technique. The data analysis is analyzed by the technique of qualitative descriptive analysis. The research founding indicated that: first, the reinforcement of maja labo dahu attitude in practicing Pancasila values in MTsN 1 Bima City can be done by several ways, such as: a) verbally, by giving the understanding the meaning about the important of maja labo dahu philosophy toward students, b) exemplary, teacher can show a positive behaviour and attitude, for instance: courtesy, honesty, discipline, and appearance that can be imitated by students, and c) Habituation of religious attitudes, politeness, mutual respect and tolerance. Second, supporting factor of reinforcement maja labo dahu attitude in practicing Pancasila values through the learning of Pancasila and civic education in MTsN 1 Bima City for supporting factor, including: a) a competence teacher, b) facility, c) curriculum, d) extracurricular activity, e) school culture, f) parents and society, g) the involvement of all the teacher and school staff. Meanwhile, obstacle factor, including: a) the curriculum content has been not listed explicitly the philosophy of maja labo dahu, b) the large school environment, c) school environment, family and society do not support each other. However, the solution is the reinforcement of maja labo dahu attitude toward students is not only the Pancasila and civic education teacher’s responsibility, but it needs the involvement of all school sides to conduct supervision, assistance, family environment, community and government. Third, the form of practicing the values of Pancasila in MTsN I Bima city, including: first principle, divine value (learning to read Al-Qur'an, hadith, praying in congregation, lecturing and reading yasin). the second principle, the value of humanity (tolerance, help, kinship, and mutual respect). third principle, the value of unity (raising the red and white flag, commemorating the Proclamation Day of August 17, reforestation, and loving local culture). The fourth principle, the value of populist (deliberation and consensus, the selection of class chairmen, student council chairmen, scout leaders and harvest discussions). And the fifth principle, the value of justice (sense of brotherhood, solidarity, tolerance and help).
Determination of the legal framework for localization science and technology valleys and technology incubators in nuclear activitiesys and technology incubators in nuclear activities
Authors: Atout Osama Mostafa 
Published: March 2021

The object of research in science and technology valleys and technology incubators, which for governments are the best investment of the scientific energies of scientists and innovators. As they are a link between research institutions and the industrial and service sectors, and as they transfer ideas and research results to different markets. This research aims to highlight the importance of Localization science and technology valleys and technological incubators related to nuclear activities, as they are one of the important tributaries to support the owners of the ideas of ambitious nuclear projects. The research also aims to shed light on the problems and obstacles that hinder the achievement of the desired goals of nuclear activities, such as:
– the lack of information in the fields related to it;
– the scarcity of expertise needed to implement it;
– the lack of funding;
– the absence of investors in this highly specific «nuclear» sector.
The research presents the extent of the possibility of Localization those nuclear activities in Egypt through establishment valleys and incubators so that through this Localization there is an integrated environment of services and support that will ensure their development, raise their growth rates, and increase their efficiency. It is will lead to an increase in the chances of their success and sustainability, especially since Nuclear technology is used in many fields of industry, medicine, and agriculture. The research highlight the provisions of Egyptian Law regarding science, technology, and innovation incentives, as well as Egyptian Law establishing the Innovators Care Fund, to determine the possibility of establishing these valleys and incubators through the provisions of Egyptian legislation.
Obtained results will have reached a great impact in encouraging investors and financiers to enter into technological partnerships with nuclear agencies in Egypt for the sake of safe investment in the elements associated with nuclear materials.
Development of technology of gas condensate extraction from the formation in the conditions of retrograde condensation
Authors: Doroshenko Volodymyr , Titlov Oleksandr , Kuper Ivan 
Published: March 2021

The object of research is gas condensate fields at a late stage of their development under conditions of a decrease in reservoir pressure below the pressure of condensate separation from a gaseous state. Reservoir losses of condensate during the development of deposits in depletion mode can reach 78 %, which entails the need to use various methods of stimulating the reservoir system to remove it. The most acceptable method is the use of a cycling process by re-injection (recirculation) of the produced and separated gas into the formation. A significant disadvantage of the cycling process is the long-term conservation of gas reserves as a result of its re-injection into the reservoir and significant capital and operating costs for dry gas injection. From a technological point of view, the use of the cycling process is constrained by the low value of the sweep efficiency. Dry gas that is injected has a lower viscosity in terms of the gas-condensate mixture is withdrawn from the reservoir, and under the conditions of the heterogeneous structure of the reservoir, its rapid breakthrough from injection to production wells takes place and, as a result, a decrease in the efficiency of condensate recovery. As an alternative to the cycling process for extracting retrograde condensate from the reservoir, it has been proposed to squeeze it out with water.
The paper proposes a unified waterflooding system, actually displacing condensate with water or a gas-water mixture. This is achieved by controlled operation of injection and production wells. First, gas is taken from the wells, and with the appearance of water in the product, methods of intensifying the transfer to the surface are used. If necessary, the wells are switched to forced production mode. The results of laboratory studies carried out on real samples of core material from the Andriyashivske gas condensate field (Ukraine) are presented. The directions of the implementation of gas-water repression in gas condensate fields with the parallel use of restrained reservoir gas available in the reservoir are substantiated. The technology allows to extract up to 50 % of the condensate dropped out in the reservoir.
Evaluation of oxidity resistance of milk-containing products based on blending of vegetable oils
Authors: Belemets Tatiana , Radzievskaya Irina , Tochkova Oksana , Yushchenko Nataliia , Kuzmyk Uliana , Mykhalevych Artur 
Published: March 2021

It is known that one of the main causes of spoilage of fats (in particular vegetable fats), as well as products made with their use, is an increase in acid and peroxide numbers. Physicochemical indicators have a significant impact not only on the quality and organoleptic characteristics of the product, but also on its safety. For this purpose, the dependence of the indicators of acid and peroxide numbers of the created blend of vegetable oils in the technologies of milk-containing products during storage has been investigated. The object of research is experimental samples of a three-component blend of vegetable oils and milk fat isolated from milk-containing curd paste and milk-containing sour cream sauce. The subject of research is the dynamics of the growth of acid and peroxide numbers of samples and changes in their organoleptic quality indicators.
The obtained data on the kinetics of oxidation of a blend of vegetable oils indicate that the increase in acid and peroxide numbers during the studied shelf life does not differ in intensity. The average threshold for an increase in acid and peroxide numbers is insignificant and amounts to 0.02–0.03 mgKOH/h and 0.2–0.21 mmol1/2O/kg for 5 days. In accordance with the obtained results of the kinetics of oxidation of the released fat of milk-containing curd paste, there is a slight increase in acid and peroxide numbers, namely: at the end of 7 days – up to 0.3 mgKOH/h and 1.9 mmol1/2O/kg, respectively, and in at the end of 10 days– up to 0.32 mgKOH/h and 2.3 mmol1/2O/kg. Based on the obtained results of the kinetics of oxidation of the released fat from the milk-containing sour cream sauce, there is a tendency to a gradual increase in the acid and peroxide numbers with an increase in the oxidation time. It is noted that the maximum values of acidic – 0.3 mgKOH/h and peroxide numbers – 2.2 mmol1/2O/kg at the end of the shelf life of 21 days are reached. According to the results obtained for the organoleptic evaluation of experimental samples of the blend and the released fat from milk-containing products, no significant changes were found during the studied shelf life.
Simulating Stochastic Diffusion Processes and Processes with “Market” Time
Authors: Boluh Kateryna , Shchestyuk Natalija 
Published: March 2021

The paper focuses on modelling, simulation techniques and numerical methods concerned stochastic processes in subject such as financial mathematics and financial engineering. The main result of this work is simulation of a stochastic process with new market active time using Monte Carlo techniques.The processes with market time is a new vision of how stock price behavior can be modeled so that the nature of the process is more real. The iterative scheme for computer modelling of this process was proposed.It includes the modeling of diffusion processes with a given marginal inverse gamma distribution. Graphs of simulation of the Ornstein-Uhlenbeck random walk for different parameters, a simulation of the diffusion process with a gamma-inverse distribution and simulation of the process with market active time are presented.To simulate stochastic processes, an iterative scheme was used:
xk+1 = xk + a(xk, tk) ∆t + b(xk, tk) √ (∆t) εk,,
where εk each time a new generation with a normal random number distribution.Next, the tools of programming languages for generating random numbers (evenly distributed, normally distributed) are investigated. Simulation (simulation) of stochastic diffusion processes is carried out; calculation errors and acceleration of convergence are calculated, Euler and Milstein schemes. At the next stage, diffusion processes with a given distribution function, namely with an inverse gamma distribution, were modelled. The final stage was the modelling of stock prices with a new "market" time, the growth of which is a diffusion process with inverse gamma distribution. In the proposed iterative scheme of stock prices, we use the modelling of market time gains as diffusion processes with a given marginal gamma-inverse distribution.The errors of calculations are evaluated using the Milstein scheme. The programmed model can be used to predict future values of time series and for option pricing.
RELASI FUZZY PADA GRUP FAKTOR FUZZY
Authors: Madani Ahmad , Abdurrahman Saman , Hijriati Na'imah 
Published: March 2021

Fuzzy subsets on the non-empty set is a mapping of this set to the interval . The concept of fuzzy subgroups introduced from advanced concept of fuzzy set in group theory. In concept of fuzzy set there is the concept of relations is fuzzy relations. In this study examined that fuzzy relations related to the equivalence and congruence on a fuzzy group and fuzzy factor group. The results of this study was to show that a fuzzy relation if and if is a fuzzy congruence relations on fuzzy group and a fuzzy relation defined of is a fuzzy congruence relations on fuzzy factor group.
PEMBENTUKAN PERSAMAAN VAN DER POL DAN SOLUSI MENGGUNAKAN METODE MULTIPLE SCALE
Authors: Na'imah Farohatin , Yulida Yuni , Karim Muhammad Ahsar 
Published: March 2021

Mathematical modeling is one of applied mathematics that explains everyday life in mathematical equations, one example is Van der Pol equation. The Van der Pol equation is an ordinary differential equation derived from the Resistor, Inductor, and Capacitor (RLC) circuit problem. The Van der Pol equation is a nonlinear ordinary differential equations that has a perturbation term. Perturbation is a problem in the system, denoted by ε which has a small value 0<E<1. The presence of perturbation tribe result in difficulty in solving the equation using anlytical methode. One method that can solve the Van der Pol equation is a multiple scale method. The purpose of this study is to explain the constructions process of Van der Pol equation, analyze dynamic equations around equilibrium, and determine the solution of Van der Pol equation uses a multiple scale method. From this study it was found that the Van der Pol equation system has one equilibrium. Through stability analysis, the Van der Pol equation system will be stable if E= 0 and -~<E<=-2. The solution of the Van der Pol equation with the multiple scale method is Keywords: Van der Pol equation, equilibrium, stability, multiple scale.
Percepatan Penutupan Luka Sayat pada Tikus Putih Akibat Pemberian Perasan Rimpang Temulawak (Curcuma xanthorrhiza Roxb.)
Authors: Barung Elisabeth Natalia , Wungow Rifny , Kalonio Donald Emilio 
Published: March 2021

Rimpang Temulawak atau Curcuma xanthorriza Roxb. adalah tanaman yang dikenal luas oleh masyarakat sebagai obat tradisional. Rimpang temulawak mengandung kurkumin dan xanthorrizzol, yang diketahui mampu mempercepat penutupan luka di kulit dan juga memiliki efek antibakteri dan antiinflamasi. Penelitian ini bertujuan untuk untuk mengetahui efektifitas perasan rimpang temulawak terhadap percepatan penutupan luka sayat pada tikus putih. Penelitian ini adalah penelitian eksperimen, dengan subyek 10 ekor tikus putih yang dibagi dalam 2 kelompok perlakuan yaitu kelompok yang diberi perasan temulawak dan kelompok kontrol negatif yang tidak diberi perlakuan. Data dikumpulkan dengan mengukur panjang luka tikus menggunakan alat ukur penggaris dan dihitung persentasi penutupan luka. Data dianalisis menggunakan analisis regresi linear dan nilai slope (b) dinyatakan sebagai kecepatan penutupan luka. Hasil penelitian ini, menunjukan bahwa rimpang temulawak mampu mempercepat penutupan luka sayat sebesar 15,262%/hari dibandingkan kelompok yang tidak diberi perlakuan sebesar 13,54%/hari. Kata Kunci: Perasan Rimpang Temulawak, Luka Sayat, Percepatan Penutupan Luka, Sediaan Sederhana, Obat Tradisional Indonesia Curcuma xanthorrhiza Roxb. is a plant that is widely known by the community as traditional medicine. The rhizome of C. xanthorrhiza contains curcumin and xanthorrhizol, which are known to be able to accelerate wound healing on the skin and also has antibacterial and anti-inflammatory effects. This study was aimed to determine the effectiveness of C. xanthorriza rhizome on the acceleration of incision wound healing on white rats. This study was an experimental study, with 10 white rat subjects divided into two treatment groups, namely the treatment group which was given by C. xanthorriza rhizome and the negative control group that was not treated. Data were collected by measuring rat wound length using a ruler and calculating the percentage of wound healing. By using linear regression analysis and the value of the slope (b) is expressed as the acceleration of wound healing. The results of the study showed that C. xanthorrhiza rhizome was able to accelerate incision wound healing by 15.262% / day compared to the untreated group of 13.54% / day.
An Immunosensor for the Detection of Speckle-type Poz Domain Protein Based on Pioneering Jasmine-like Cu@l-asp Hybrid Nanoflowers and Palladium-platinum Nanoparticles.
Authors: Yue Song , Sun Kexin , Li Siyuan , Liu Yi , Zhu Qihao , Chen Yiyu , Yuan Dong , Wen Tao , Ge Mingjian , Yu Qiubo 
Published: March 2021

Abstract
In this paper, we first synthesis three-dimensional(3D) jasmine-like Cu@L-Asp inorganic-organic hybrid nanoflowers to load palladium-platinum nanoparticles as the signal enhancer in order to quantify intracellular speckle-type POZ domain protein (SPOP). Scanning electron microscope (SEM), fourier transform infrared (FT-IR), energy dispersive spectrometer (EDS), X-ray photoelectron spectroscopy (XPS) analysis was used to characterize the newly synthesized materials. The newly formed Cu@L-Asp/Pd-PtNPs can catalyze the decomposition of hydrogen peroxide and exhibit excellent catalytic performance. When different concentration of SPOP is captured by SPOP antibody linked to the surface of Cu@L-Asp/Pd-Pt NPs, the current signal decreases with the increase concentration of SPOP. After optimization, the SPOP immunosensor exhibited a good linear response over a concentration range from 0.1 pg mL-1-1 ng mL-1. The proposed sensor demonstrates good stability, acceptable reproducibility and excellent selectivity to the SPOP in the presence of possible interfering substances and has great potential application for detecting other intracellular macromolecular substances.