bluuebunny/crossref_metadata_2025 huggingface dataset:
An electrochemical biosensor to identify the phenotype of aggressive breast cancer cells
Authors: Wang Lin , Xie Haojie , Zhou Xinyi , Lin Yuxin , Qin Yujia , Yang Jie , Zhao Jing , Li Genxi
Published: February 2023

An electrochemical biosensor is fabricated to identify the phenotype of aggressive breast cancer cells via detection of HER-2 together with MMP-2.
Machine learning coarse-grained models of dissolutive wetting: a droplet on soluble surfaces
Authors: Miao Qing , Yuan Quanzi
Published: February 2023

Based on neural networks, coarse-grained glucose–water dissolution pair models with all-atomic system precision are developed, which can be used to explore the dynamics of dissolutive wetting on larger scales.
The design and synthesis of green emissive iridium(iii) complexes guided by calculations of the vibrationally-resolved emission spectra
Authors: Mackenzie Campbell Frank Ross , Kwak Seung-Yeon , Kim Sungmin , Zysman-Colman Eli
Published: February 2023

This combined synthetic and computational project explores the impact of adding heavy atoms to ligands on emissive iridium complexes. Addition of trimethylsilyl groups to Ir(ppy)2(pic) resulted in modest narrowing of the emission spectra.
Selection criteria for electrical double layer structure regulators enabling stable Zn metal anodes
Authors: Huang Cong , Zhao Xin , Hao Yisu , Yang Yujie , Qian Yang , Chang Ge , Zhang Yan , Tang Qunli , Hu Aiping , Chen Xiaohua
Published: February 2023

Combined with experimental and theoretical studies, we revealed a critical criterion that gives priority to the SEI-forming capability of additives for developing effective EDL structure regulators.
Rational design of COF–MOF composites for ratiometric fluorescence detection of phosphate
Authors: Yu Yun-Jie , Li Wei , Ren Shi-Bin , Zhou Xian-Jing , Han De-Man
Published: February 2023

Construction of COF–MOF composites with good stability and dual emissions for ratiometric fluorescence detection of phosphate.
Highly selective photocatalytic oxidation of 5-hydroxymethylfurfural by interfacial Pt–O bonding Pt–Ov–BiOBr
Authors: Gong Ming , Zhao Hui , Pan Chengsi , Dong Yuming , Guo Yingxin , Li Haixia , Zhang Jiawei , Wang Guangli , Zhu Yongfa
Published: February 2023

Ov–BiOBr was synthesized by hydrothermal method, and Pt was loaded onto it by photo deposition. Pt can transfer photogenerated electrons from Ov–BiOBr to Pt to efficiently generate superoxide radicals by forming Pt–O bonds as electronic transmission channels.
Integrating RuO2@TiO2catalyzed electrochemical chlorine evolution with a NO oxidation reaction for nitrate synthesis
Authors: Zhang Longcheng , Liang Jie , He Xun , Yang Qin , Luo Yongsong , Zheng Dongdong , Sun Shengjun , Zhang Jing , Yan Hong , Ying Binwu , Guo Xiaodong , Sun Xuping
Published: February 2023

A highly efficient approach for nitrate synthesis is developed under ambient conditions. The electrochemical generation of active chloride species by RuO2@TiO2/TP in chlorine evolution reaction effectively convert NO to nitrate in the electrolyte.
Synthesis of fluorinated allylic alcoholsviaphotoinduced decarboxylative cross-coupling of α-fluoroacrylic acids and alcohols
Authors: Lu Xiao-Yu , Gao Meng-Ting , Yu Li-Juan , Pan Hong-Ye , Zhang Xiang , Huang Rui , Yang Kang , Shui Fu-Yi , Song Yi-Wei , Yang Gui-Xian
Published: February 2023

Herein, a practical and robust methodology for photoinduced decarboxylative and dehydrogenative cross-coupling is reported.
Combining photoredox catalysis and hydrogen atom transfer for dearomative functionalization of electron rich heteroarenes
Authors: Ji Peng , Meng Xiang , Chen Jing , Gao Feng , Xu Hang , Wang Wei
Published: February 2023

Engineering organophotoredox catalysis with hydrogen atom transfer directs toward an unfavorable dearomatization process under mild reaction conditions.
eROSITA Final Equatorial-Depth Survey (eFEDS)
Authors: Ichikawa Kohei , Yamashita Takuji , Merloni Andrea , Li Junyao , Liu Teng , Salvato Mara , Akiyama Masayuki , Arcodia Riccardo , Dwelly Tom , Chen Xiaoyang , Imanishi Masatoshi , Inayoshi Kohei , Kawaguchi Toshihiro , Kawamuro Taiki , Kokubo Mitsuru , Matsuoka Yoshiki , Nagao Tohru , Schramm Malte , Suh Hyewon , Tanaka Masayuki , Toba Yoshiki , Ueda Yoshihiro
Published: February 2023

We constructed the eROSITA X-ray catalog of radio galaxies discovered by the WERGS survey, made by cross-matching the wide area Subaru/Hyper Suprime-Cam (HSC) optical survey and VLA/FIRST 1.4 GHz radio survey. We report finding 393 eROSITA detected radio galaxies in the 0.5−2 keV band in the eFEDS field covering 140 deg2. Thanks to the wide and medium depth eFEDS X-ray survey down tof0.5 − 2 keV = 6.5 × 10−15erg s−1cm−2, the sample contains the rare and most X-ray luminous radio galaxies above the knee of the X-ray luminosity function, spanning 44 < log(L0.5−2 keV(abs,corr)/erg s−1) < 46.5 at 1 < z < 4. The sample also contains the sources around and below the knee for the sources 41 < log(L0.5−2 keV(abs,corr)/erg s−1) < 45 atz < 1. Based on the X-ray properties obtained by the spectral fitting, 37 sources show obscured active galactic nucleus (AGN) signatures with log(NH/cm−2) > 22. These obscured and radio AGN reside in 0.4 < z < 3.2, indicating that they are obscured counterparts of the radio-loud quasar, which were missed in the previous optical quasar surveys. By combining radio and X-ray luminosities, we also investigated the jet production efficiencyηjet = ηradPjet/LAGN,bolby utilizing the jet power ofPjet. We find that there are 14 sources with extremely high jet production efficiency atηjet ≈ 1. This highηjetvalue might be a result of the decreased radiation efficiency ofηrad < 0.1, due to the low accretion rate for those sources, and/or of the boosting due to the decline ofLAGN,bolby a factor of 10−100 by keepingPjetconstant in the previous Myr, indicating the experience of the AGN feedback. Finally, inferring the BH masses from the stellar mass, we find that X-ray luminous sources show the excess of the radio emission with respect to the value estimated from the fundamental plane. This radio emission excess cannot be explained by the Doppler boosting alone, and therefore the disk–jet connection of X-ray luminous eFEDS-WERGS is fundamentally different from the conventional fundamental plane which mainly covers the low-accretion regime.
Where intermediate-mass black holes could hide in the Galactic Centre
Authors:   Gravity Collaboration, Straub O. , Bauböck M. , Abuter R. , Aimar N. , Amaro Seoane P. , Amorim A. , Berger J. P. , Bonnet H. , Bourdarot G. , Brandner W. , Cardoso V. , Clénet Y. , Dallilar Y. , Davies R. , de Zeeuw P. T. , Dexter J. , Drescher A. , Eisenhauer F. , Förster Schreiber N. M. , Foschi A. , Garcia P. , Gao F. , Gendron E. , Genzel R. , Gillessen S. , Habibi M. , Haubois X. , Heißel G. , Henning T. , Hippler S. , Horrobin M. , Jochum L. , Jocou L. , Kaufer A. , Kervella P. , Lacour S. , Lapeyrère V. , Le Bouquin J.-B. , Léna P. , Lutz D. , Ott T. , Paumard T. , Perraut K. , Perrin G. , Pfuhl O. , Rabien S. , Ribeiro D. C. , Sadun Bordoni M. , Scheithauer S. , Shangguan J. , Shimizu T. , Stadler J. , Straubmeier C. , Sturm E. , Tacconi L. J. , Vincent F. , von Fellenberg S. , Widmann F. , Wieprecht E. , Wiezorrek E. , Woillez J. , Yazici S.
Published: February 2023

Context. In the Milky Way the central massive black hole, Sgr A*, coexists with a compact nuclear star cluster that contains a sub-parsec concentration of fast-moving young stars called S-stars. Their location and age are not easily explained by current star formation models, and in several scenarios the presence of an intermediate-mass black hole (IMBH) has been invoked.

Aims. We use GRAVITY astrometric and SINFONI, KECK, and GNIRS spectroscopic data of S2, the best known S-star, to investigate whether a second massive object could be present deep in the Galactic Centre (GC) in the form of an IMBH binary companion to Sgr A*.

Methods. To solve the three-body problem, we used a post-Newtonian framework and consider two types of settings: (i) a hierarchical set-up where the star S2 orbits the Sgr A*–IMBH binary and (ii) a non-hierarchical set-up where the IMBH trajectory lies outside the S2 orbit. In both cases we explore the full 20-dimensional parameter space by employing a Bayesian dynamic nested sampling method.

Results. For the hierarchical case we find the strongest constraints: IMBH masses > 2000 M⊙ on orbits with smaller semi-major axes than S2 are largely excluded. For the non-hierarchical case, the chaotic nature of the problem becomes significant: the parameter space contains several pockets of valid IMBH solutions. However, a closer analysis of their impact on the resident stars reveals that IMBHs on semi-major axes larger than S2 tend to disrupt the S-star cluster in less than a million years. This makes the existence of an IMBH among the S-stars highly unlikely.

Conclusions. The current S2 data do not formally require the presence of an IMBH. If an IMBH hides in the GC, it has to be either a low-mass IMBH inside the S2 orbit that moves on a short and significantly inclined trajectory or an IMBH with a semi-major axis > 1″. We provide the parameter maps of valid IMBH solutions in the GC and discuss the general structure of our results and how future observations can help to put even stronger constraints on the properties of IMBHs in the GC.
Polarization aberrations in next-generation giant segmented mirror telescopes (GSMTs)
Authors: Anche Ramya M. , Ashcraft Jaren N. , Haffert Sebastiaan Y. , Millar-Blanchaer Maxwell A. , Douglas Ewan S. , Snik Frans , Williams Grant , van Holstein Rob G. , Doelman David , Van Gorkom Kyle , Skidmore Warren
Published: February 2023

Context. Next-generation large segmented mirror telescopes are expected to perform direct imaging and characterization of Earth-like rocky planets, which requires contrast limits of 10−7 to 10−8 at wavelengths from I to J band. One critical aspect affecting the raw on-sky contrast are polarization aberrations (i.e., polarization-dependent phase and amplitude patterns in the pupil) arising from the reflection from the telescope’s mirror surfaces and instrument optics. These polarization aberrations induce false signals for polarimetry that can be calibrated to a certain degree, but they can also fundamentally limit the achievable contrast of coronagraphic systems.

Aims. We simulate the polarization aberrations and estimate their effect on the achievable contrast for three next-generation ground-based large segmented mirror telescopes.

Methods. We performed ray-tracing in Zemax® and computed the polarization aberrations and Jones pupil maps using the polarization ray-tracing algorithm. The impact of these aberrations on the contrast is estimated by propagating the Jones pupil maps through a set of idealized coronagraphs using hcipy, a physical optics-based simulation framework.

Results. The optical modeling of the giant segmented mirror telescopes (GSMTs) shows that polarization aberrations create significant leakage through a coronagraphic system. The dominant aberration is retardance defocus, which originates from the steep angles on the primary and secondary mirrors. The retardance defocus limits the contrast to 10−5 to 10−4 at 1 λ/D at visible wavelengths, and 10−5 to 10−6 at infrared wavelengths. The simulations also show that the coating plays a major role in determining the strength of the aberrations.

Conclusions. Polarization aberrations will need to be considered during the design of high-contrast imaging instruments for the next generation of extremely large telescopes. This can be achieved either through compensation optics, robust coronagraphs, specialized coatings, calibration, and data analysis approaches, or by incorporating polarimetry with high-contrast imaging to measure these effects.
Growth and development of F1 hybrid progenies of Schwitz cows using beef breeds
Authors: Madrakhimov Shodlik , Roziboev Nuraddin
Published: February 2023

The live weight of bulls at 9 months of age of groups II, III and IV (crossbreed 1) was 305.6, 304.1 and 307.6 kg, respectively, compared with peers of group I 15.3 kg (5.0%), 13.8 kg (4.5%) and 17.3 kg (5.6%) were higher (P≤0.001). Also, for a 9-month growth period, the average daily gain in group II was 1018.5 g, which amounted to 62.2 g or 6.1% (P≤0.001), 25.9 g or 2.5% (P≤0.01) and 24.4 g or 2.4%. (P≤0.01). According to external parameters, the growth of bulls at 6 months of age is 2.3 cm, (2.3%, Р≤0.05), 1.8 cm (1.8%, (Р≤0.05) and 1.3 cm (1.3%) with a height of 2.7 cm, 1.8 cm and 1.6 cm. Later sizes, on the contrary, were higher in bulls of group IV. For example, the depth of the chest of bulls of groups IV is 4.6 cm, 3.3 cm (Р≤0.001) and 1.1 cm (Р≤0.05) in peers of groups I, II and III, respectively, chest circumference 6.2 cm, 4.8 cm (Р≤0.001) and 0.8 cm (P≤0.05), oblique body length 3.8 cm (P≤0.001), 3.6 cm (P≤0.001) and 0.4 cm, width of the hind leg by 0.6 cm, 0.9 cm and 0.7 cm.
Obtaining paper from composition of different fibers and its analysis
Authors: Egamberdiev E. , Turabdjanov S. , Akmalova G. , Mukhtarova N. , Ayubova I. , Mirzakhmedova M. , Rakhmonberdiev G.
Published: February 2023

Cellulose and paper products are produced from cotton wool in our republic. Since 1995, the production of these products has increased several times. Nevertheless, 10% of the demand for pulp and paper products in our Republic is met. uring 1988-1993, this growth was 6%, which was 3 times higher than wood pulp production. Extraction of cellulose from annual plants is well developed in China and India. 77% of the world's cellulose obtained from annual plants is produced in these countries. The People's Republic of China gets 50% of its paper output from annual plants. Cellulose was obtained from plants containing cellulose, and their properties were studied. Paper products were obtained from the resulting pulps and its quality indicators were studied based on the standards applied to papers used in industry.
Effect of chitosan on the surface properties of cellulose-based paper obtained from the flax plant
Authors: Egamberdiev E. , Ergashev Y. , Turabdjanov S. , Abdumavlyanova M. , Makhkamov A. , Rashidov Sh. , Karimov Sh.
Published: February 2023

The effects of chitosan, starch, and polyvinyl alcohol (PVA) were studied to improve the surface properties of cellulose-based paper obtained from local raw materials. Polymers are incorporated into the paper canvas by spraying. The results showed that the addition of chitosan to paper webs made from cellulose fibers has improved surface properties compared to the effects of other additives. The effect level of starch was similar to that of chitosan, but it resulted in a lower water absorption potential of paper than chitosan at the same concentration. In many other properties, particularly for printing papers, the most important property being surface smoothness, chitosan treated papers are superior to starch or PVA treated papers.
Sedimentation-resistant and moderately expanding grouting composition
Authors: Eshpolatov T. , Nazarbekova D. , Musaeva D.
Published: February 2023

The results of the conducted studies allow us to conclude that an increase in the number of micelles per unit volume of the grouting solution will lead to an increase in its sedimentation stability. The desired effect can be achieved by increasing the concentrations of surfactants in the mixing fluid or by introducing an electrolyte. Since the presence of sites with adsorbed surfactant additive on the surface of the dispersed phase particles significantly changes the conditions for the formation of phase contacts, which, accordingly, will affect the properties of the hardening grouting system.
Improving the cleaning efficiency of pile drums
Authors: Parpiev Azimjon , Shorakhmedova Mamura , Kupalova Yulduz
Published: February 2023

The condition of cleaning machine-picked cotton in technological processes and the possibility of increasing the efficiency of cleaning pile drums due to changing different surface sizes have been analyzed in the given article. A part from it, the quality of the fiber produced at cotton gins, the impurities of natural and technological defects in its composition were analyzed. It has been shown that insufficient efficiency of cleaning technological equipment, an increase in the proportion of impurities in the fiber has decreased in the amount of obtaining "higher" and "middle" classes of cotton. It has been established that the cleaning efficiency can be increased due to the size of the mesh surface holes of pile drums, the cleaning return of pile and sawn cotton, the impact on the cleaning efficiency of cotton work productivity has been determined. The regression equation, which characterizes their interconnections, was obtained due to cleaning relapses. When cleaning cotton, it has been shown that increasing the width of the mesh surface Holes by 8mm will cause the cotton to get dirty and cause the holes to be in a state of cotton congestion. The character of a decrease in cleaning efficiency was determined in the sequence of cleaning cotton in pile and saw cleaners. The impact of work productivity on cotton was shown in the sharp decline in the efficiency of cleaning pile drums in Sections 3 and 4. Based on the analysis of the results obtained and the size of the holes of the mesh surface of the pile drums be 8x50 mm wer recommended.
Research on the geometric dimensions of fine pollutants in cotton
Authors: Parpiev Azimjon , Shorahmedova Mamura , Saidbekova Saida
Published: February 2023

This article is devoted to the study of the geometric dimensions of fine pollutants in cotton and the factors affecting them. Mass and quantitative fractions of small and large pollutants were compared. As an object of cotton cleaning, it was found that cotton contained different proportions in terms of the amount of fine pollutants. Although large pollutants exhibited a higher proportion of the total contamination in terms of weight, these pollutants were verified to exhibit a negligible proportion in terms of numbers. One gram of different selections and industrial varieties of cotton was obtained, in terms of contamination and harvesting type. The pollution amount was determined similar in terms of the total quantity and magnitude. The results of mathematical and statistical processing of the obtained results indicated that the number of pollutants per gram were statistically insignificant and differed among the experimental variants, but the value of the square inequality was higher. The results demonstrated that there exists a need to conduct a wide range of experimental tests in this area to determine the impact and interrelationships among all external factors on the size of the pollutant fraction and proportions.
Effect of mineral and organic fertilizers on the growth and development of African millet
Authors: Kasimov Botir , Namozov Normamat , Islamov Sokhib
Published: February 2023

African millet is small, about 1000 seeds 5-10 gram and is the best feed for birds. The stalk is superior to all other fodder crops in silage and dry state in terms of its nutritive value and high protein content. Alcohol is extracted from grain and used in the production of beer in the food industry, flour is made from grain and added to wheat flour to make high-quality bread containing various minerals. Another fact is that grain yield is around 0.7-1.2 t/ha, and in some conditions, it reaches 1.8-2.0 t/ha. The root reaches more than 2 meters deep, which ensures drought resistance and wind resistance. The important biological properties of African millet are its high yield, disease resistance, rapid reproduction, high fodder and nutritional properties of the grain, drought resistance, high temperature deficiency resistance, green mass gives an abundant yield. Furthermore, it is less affected by pests and diseases than other cereal crops. African millet “HHVBC tall” and “EEBC” varieties were investigated in eight variants with three iterations according to feeding standards. According to the results, on May 22, 2015, the plant height was 44-45 cm in the EEBC variety and 47-48 cm in the HHVBC tall variety. It was found that when the phenological observations were made on June 20, the average plant height was 130-125 cm in the EEBC variety, whereas it was 95-120 cm in the HHVBC tall variety. It can be seen that the height of EEBC variety compared to HHVBC tall variety was greater.
Efficiency of drip irrigation of almonds and pistachios with snow and rainwater
Authors: Isaev Sabirjan , Khasanova Odina , Boltaev Sadulla , Dauletbayev Bizhan , Djumanazarova Altingul
Published: February 2023

According to experts worldwide, more than 700 million people need water reserves, and more than 1.7 billion households living in river basins need additional sources of clean water. Therefore, it is necessary to widely implement water-saving technologies in the irrigation of almonds and pistachios. In this regard, it is important to grow a rich and high-quality crop from agricultural crops through the rational use of Natural Resources, the widespread introduction of water-repellent technologies. More than 700 million people need water reserves, and more than 1.7 billion households living in river basins need additional sources of clean water. Noteworthy, the obtained data on wheat productivity were analyzed mathematically and statistically using the method of dispersion analysis in the manual “Methodology of field experience” by B.A. Dospehov. It was found that the soil of the experimental field had a humus content of 0.746%, followed by total nitrogen content was 0.088% and total phosphorus was 0.212%. According to the results, in 2014, when almonds were irrigated in the order of 60-65-60% relative to LFMC, the volume mass in the 0-30 cm layer of the soil was 1.30 g/cm3, followed by 1.34g/cm3at 0-50 cm, and it was 41 g/cm3at 0-100 cm. When irrigating almond in the order of 70-75-65% compared to LFMC, it was equal to 1.30 g/cm3, 1.34 g/cm3and 1.42 g/cm3, and on pistachio, it was 1.32; 1.36 and 1.43 g/cm3, correspondingly.
Effect of chitosan substance on the mechanical properties of paper obtained on the basis of flax cellulose
Authors: Egamberdiev E. , Turabdjanov S. , Mirzaeva D. , Khaydullaev Kh. , Sharipova U. , Shokhakimova A. , Bakhtiyorov O.
Published: February 2023

Chitosan occurs in different molecular weights and degrees of deacetylation. Molecular weight and degree of deacetylation are the main factors affecting particle size, particle formation and aggregation. The use of chitosan improved the dry strength of the paper, especially by adding 1% low molecular weight chitosan. But the increase in concentration reduced its dry strength. This can be explained as follows. The connection must correspond to the distance between the segments between the fibers, because they form an inter-fiber connection area. Even if the water molecule is separated from the organic bond with the fibers or not, a large amount of water destroys the bond state of the paper. These factors are important in the paper industry. Paper-like materials were obtained on the basis of cellulose obtained from the stem of the flax plant. The effect of fibers and adhesives in the composition on the quality indicators of the obtained paper was considered. The effects of chitosan and starch glue were compared. It can be explained that the hydrogen bond on the fiber surface is mainly monopolized by the water molecule, because the fiber forms a macroscopic liquid bridge. The weakness of this bridge indicates the wet tensile strength of the paper.
Timing and standards of planting winter wheat in irrigated lands
Authors: Botirov Khidir , Pardaev Burkhon , Makhmudova Yulduz
Published: February 2023

In farming conditions with good water or irrigation, planting of varieties belonging to the intensive type gives good results. The importance of intensive varieties increases even more when using accelerated technology in wheat cultivation. The potential yield and product quality of a variety depends on genetic characteristics and growing conditions and agrotechnics [7-8, 11]. High potential productivity is achieved when cultivation conditions, including agrotechnics, are suitable for the biological and ecological characteristics of the variety. When 24 varieties of wheat belonging to the countries of Central Asia and Transcaucasia were tested under the same conditions in irrigated land at the Research Institute of Plant Science of Uzbekistan, the difference in yield between varieties was 32 q (112-80 q/ha). According to the results, it was found that the higher plant height was recorded in the “Drujba” variety on September 20, accounted for 92 cm, whereas in the “Grom” variety, the lowest one was found on November 1, which was 81 cm. The results of the grains in one ear showed that the highest result was observed in the “ASR” variety, which was 56 pieces on october 10, however, this number was quite low than in other varieties.
Fuzzy modeling for toolkit synthesis of managing international digital flows
Authors: Chistyakov Andrey , Eletsky Nikolay
Published: February 2023

Currently, there is a transition to a new stage of globalization – informational-digital one. It is not deglobalization that is taking place, but the formation of a globally-digital neo-economy, in which the previous historical types of economic relationships are transformed into forms of digital flows and are subordinated to them. Under conditions of the genesis of neo-economics, it is becoming increasingly urgent to improve the efficiency of international digital flows (IDF)-management both in economic and social aspects. At the same time, the global level of governance is contradictory to other descending social levels. The problem of global economic efficiency is complicated by the modern imperatives of digital sovereignty, which is especially evident in the context of geopolitical and regional conflicts. The formalization of the analysis does not eliminate the causes of conflicts, but allows for a fuller understanding their mechanisms and ways of overcoming. In this regard, a model of morphological synthesis and ranking of alternatives of the IDF-flows managing tools based on a fuzzy multi-attribute selection system is presented. The model provides an opportunity to effectively take into account the multidirectional and mutually compensating aspects of digital flow management.
Business game on the mediation procedure as a way to form conflict - sustainable behavior
Authors: Minasyan Larisa , Givargizova Narine , Wiegel Narine , Kaneeva Anna , Davidova Ekaterina
Published: February 2023

The article considers a variant of the business game as one of the effective ways of teaching students to prepare them for a real situation in the event of a labor conflict. Artificial imitation of the proposed model as the main semantic orientation involves the regulation of conflict through mediation. Based on the analysis of an array of domestic and foreign sources, the key points of the mediation approach for including them in the content of the game were identified, and it was also concluded that mediation is not properly widespread in Russia, which is confirmed by the results of a mass survey among domestic youth aged 22-30 years. The sample consisted of 497 respondents, of which 70% may find themselves in a conflict situation in their work at any time. The results of the survey confirmed the hypothesis of the respondents' ignorance of the mediation option of conflict regulation, which determines the relevance and timeliness of the introduction into the educational process of knowledge, skills and abilities on the use of mediation procedures in conflict regulation. It is concluded that the acquired abstract knowledge in the course of the business game tends to turn into real-applicable.
Induction of direct organogenesis in Blackberry (Rubus fruticosusL.) using leaf explants
Authors: Mullo Freddy , Kornatsky Sergey , Semenova Natalia , Romanova Elena
Published: February 2023

This study is to establish the best conditions for in vitro propagation by inducing direct organogenesis of “Thornfree” blackberry (Rubus fruticosusL.) using different doses of plant growth regulators, which affect the regeneration of shoots in compound nutrient medium of mineral salts Murashige and Skoog (MS). Young leaves were used as explants. In the initiation phase, plant material necessary for the experiment was obtained, using an MS nutrient medium enriched with 0.5 mg. l-1of BAP, after 30 days’ leaves were obtained that were introduced in regeneration medium where the effect of BAP (1 and 2 mg. l-1) was evaluated in combination with AIA (0.5 mg. l-1) and TDZ (0.5 mg. l-1). The highest number of shoots with an average of 6.40 and oxidation percentage of 7.41% was achieved. In the proliferation phase no significant statistical differences were observed, however, the optimum performance attained for the number of buds was obtained with a concentration of 2 mg. l-1of BAP, having an average shoot-length of 6.10 cm and a rooting percentage of over 80%.
Saving the environment by automation of crude oil distillation in a rectification column
Authors: Semenov Alexander , Podkamennyi Yuri , Bebikhov Yuri , Yakushev Ilya
Published: February 2023

The article shows the results of the development of an automated control system for the distillation of oil in a distillation column, which makes it possible to save the environment. In the theoretical part, the process of distillation of crude oil in a distillation column is described and its technological scheme is given for atmospheric distillation with a single evaporation of oil. In the calculation part, the heat and material balance of mass transfer in the rectification column has been analyzed. In the practical part, the problems of installing process control instruments, improving the emergency shutdown system reliability, expanding the automatic and automated monitoring and control functions, and improving the process control and facility performance analysis quality have been solved. The authors used the Trace Mode 6 software package to develop the SCADA of the distillation column control system. In conclusion, it was noted that the development and implementation of an automated control system for the oil distillation process provides an increase in plant productivity, as well as the quality and reliability of the process, which in turn has a positive effect on environmental conservation.
Displacement ventilation application for living quarters
Authors: Kovačević Sanja
Published: February 2023

The displacement ventilation applied in industrial and nonindustrial premises is considered. It is noted that there are no studies for residential buildings. The main patterns of indoor air flow in such ventilation systems are defined according to the literature data for non-industrial premises. A study was conducted on displacement flow ventilation in a living space. Air is supplied to the lower zone and extracted from the upper zone. Simulation of the room in the Star SSM+ software package was performed, and the air temperature distribution in the room volume was determined. It was found that the displacement ventilation in the dwelling provides on average comfortable air temperature in the volume of the dwelling. However, the air temperature of ~15-20 °С at human feet causes discomfort to the person.
Experience of strengthening the soil base with parallel lifting of the foundation structure
Authors: Rachkov Dmitrij , Volosyuk Denis , Pronozin Yakov , Bartolomej Leonid
Published: February 2023

The article shows the positive experience of fixing the soil base and strengthening the foundation with the parallel restoration of the normative state of the underground and above-ground structures of the facility. The accidents at the considered objects is caused by the formation of significant voids under the foundation. Foundations at the objects are represented by monolithic reinforced concrete slab and strip. Recommendations are given on the development of design solutions, organization of work, and the compositions of injection mortars are analyzed. Injection compositions were presented on the basis of cement and sand-cement mixture, the argumentation of the use of these compositions on specific engineering-geological conditions is given. Stabilization of the foundation was additionally made by strengthening with "Atlant" piles. The variants of the object geometric position correction by mortar injection into the contact layer and into the active soil strata are presented. The development of a reliable solution for reinforcement is possible only if there are an accurate data of the geotechnical conditions of the construction site, a detailed visual and instrumental survey of building structures. The processes of fixing soil foundations with parallel lifting of underground and above-ground structures are provided today with the necessary level of equipment development. However, it is necessary to ensure its technologically correct use, adapted to a specific situation. The options for solving emergency situations considered in the article can be used as proven design solutions at facilities with similar engineering and geological conditions and foundation structures.
Monitoring of Vibration Driving of Sheet Piles in Soft Soil Conditions
Authors: Polunin Vyacheslav , Diakonov Ivan , Lobov Ivan , Gorkina Maria
Published: February 2023

The article discusses the features of monitoring the dynamic impact, processes of vibration driving and vibro-extraction of sheet piles in conditions of a large thickness of weak, water-saturated soils. Many years of development experience has shown that, with respect to reliability, it is not enough to carry out analysis with calculations only in the preparation of loadings. The generated vibration field has a negative impact on the structures located near. The analysis of the existing normative documents on the assessment of the dynamic impact on the construction site is given. It is noted that modern monitoring techniques make it possible to assess the impact of the surface Rayleigh wave, however, the development of additional deformations of buildings is caused by deep, body waves that affect the weak underlying soils of the base. Based on the results of numerical modeling and analysis of experimental studies of other authors, an alternative scheme for installing vibration sensors is proposed for assessing the dynamic impact during immersion and extraction of sheet piles.
Change in surface roughness of composite piles when pressing into the ground
Authors: Boyarintsev Andrey , Sukhov Timur , Tumashevskaia Elizaveta
Published: February 2023

The bearing capacity of piles on the ground is one of the main characteristics of pile foundations, which is responsible for its interaction with the ground. This characteristic depends on many factors: the granulometric composition of the soil, its moisture content, con-sistency, texture, as well as the type and properties of the pile material. One of the main charac-teristics of the pile material is its surface roughness. In many studies, the dependence of the angle of friction of the soil against the material of the pile on the value of the roughness of its surface was noted. At the same time, all studies focused exclusively on the dependence of the angle of friction on the roughness, not paying attention to the possibility of its variability in the process of driving the pile into the ground. This goal was set in the framework of this study. Using a standard single-plane cutter, the passage of a composite pile at a distance of 0.5m was simulated at a depth of 10 m. Before and after the test, the surface roughness parameters were measured using the Seitronic PSh8-1 SS device. The results showed that after the test, the roughness of the fiberglass plate made on the basis of polyester resin by the pultrusion method decreased by 44.4%.
Pilot project: applying the Tunnel-in-Tunnel method on DB electrified routes
Authors: Mähner Dietmar
Published: February 2023

This report deals with the refurbishing of the Petersberg Tunnel. In this connection, for the first time within the scope of the pilot project, the tunnel-in-tunnel method was applied on an electrified line belonging to the DB. The tunnel cross-section was enlarged within the scope of the excavation. These activities were executed with the aid of a tunnel enlargement system (TES). Towards this end, the existing overhead line for electrification of the route had to be integrated in the excavation. Once the driving operations had been completed, the tunnel inner shell made of reinforced concrete was produced. Thanks to this project the spectrum of refurbishing tunnels has been performed.
Use of recycled tires for seismic protection of embankment dams
Authors: Gabibov Fakhraddin , Shokbarov Yeraly , Gabibova Leyli
Published: February 2023

Earth dams are currently the main type of retaining structures designed and built in areas of high seismic activity. One of the constructive measures to improve the seismic resistance of earth dams is a solution based on the use of the principle of seismic isolation. In the course of the work, structures of embankment dams were developed with a seismic isolation layer located between the body of the dam and its soil base. The seismic isolation layer is formed using recycled metal-cord tires filled with gumbrine. The use of these new designs allows, due to the unique technical properties of the waste (tires and gumbrin), to achieve increased damping and diffraction. Soil reinforcement is one of the constructive measures used on dams of small and medium height to increase their seismic resistance. The paper presents new structures of earthquake-resistant embankment dams with reinforcing elements. These reinforcing elements are made from recycled tires of heavy vehicles and concrete blocks. When seismic forces act on the dam, the reinforcing elements take on excess tensile forces due to adhesion to the dam soil. The deformability of the soil is limited and regulated by elastic tires and reinforced concrete beams in the reinforcing elements, which, with the help of tubular connections, work as one whole system. A new design of an earthquake-resistant group dam with reinforcing elements using recycled steel cord tires of two sizes has been developed. The reinforcing element consists of concrete blocks made of two paired concrete discs. The disks of larger diameter are located below the disks of smaller diameter. Recycled tires act as a fixed formwork in the manufacture of concrete discs.
Peculiarities of the use of interactive technologies in training future specialists of the agro-industrial complex
Authors: Morozova Yanina , Danelyan Diana , Kuleshova Ekaterina , Moiseeva Valeria
Published: February 2023

The development of all spheres of social life leads to increasing requirements for professionalism and competence of specialists in various industries. In order to meet the requirements of employers and the constantly changing labour market conditions, it is necessary to improve the quality of specialists training by improving the education system in educational institutions. Requirements for specialist training in the Russian Federation are regulated by a number of legislative acts, such as the Federal law "On Education in the Russian Federation", "Strategy of Innovative Development of the Russian Federation until 2020", the Federal State Educational Standard for Higher Professional Education (3rd generations FSES), sample curriculum for the discipline "Foreign Language" for non-linguistic universities and faculties (approved by the Ministry of Education and Science of the Russian Federation, 2011). Based on the above-mentioned regulatory framework, educational institutions develop local regulatory and methodological base, including work programmes, a set of assessment tools and other materials. In particular, such a base was developed at the Don State Technical University for future specialists in the agro-industrial complex. The discipline "Foreign Language" was introduced into the educational program to form students' foreign language communicative competence - the readiness and ability to carry out oral and written communication in social, academic and professional spheres, including using knowledge of the basics of professional terminology in a foreign language.
Recycling construction waste in real estate reproduction in the Russian Federation
Authors: Shakhbanova Inara , Ibragimova Zaira , Radjabova Zemfira , Sungieva Jamilya , Magomedov Jafar
Published: February 2023

This article discusses the main problematic aspects of the processing of construction waste, due to the growth in the volume of real estate. The purpose of the article is to analyze the efficiency indicators of the use of construction waste processing in the production of real estate objects. Based on this goal, the following tasks were set: identifying the main factors hindering the development of construction waste recycling and developing a general model of environmental and economic efficiency at the stage of recycling and processing.Research methods. The composition of the methods that ensured the conduct of this work included: methods of economic and mathematical modeling, analysis of expert estimates and initial retrospective analysis.Conclusions. The article presents the results of a study on the use of technologies for processing waste from the construction industry and shows the effectiveness of the economic and environmental provision of real estate. The authors proposed a scenario model for forecasting the development of the construction waste processing industry.
Modeling the process of choosing energy-saving technologies in the exploitation of transport infrastructure buildings
Authors: Dement'eva Marina
Published: February 2023

According to the approved strategy for the development of the country's transport complex, the current trend is to increase the energy efficiency of service and industrial buildings. The analysis of scientific research carried out confirms that the variety of energy-saving technologies complicates the process of choosing optimal design solutions. It is also noted that the primary indicators of the choice of energy-saving technologies do not take into account prospective operating costs, as well as a likely decrease in the reliability of the functioning of buildings and structures of the transport infrastructure during operation. Therefore, the purpose of the study was to develop a model for multi-criteria decision making on the choice of the optimal energy-saving technology. The article proposes four levels of ranging of criteria, taking into account federal requirements, regional and industry specifics, as well as the availability of local mechanisms for the implementation of energy-saving technologies. Normalized indicators are referred to supra-rank criteria. The significance of organizational-technological, technical-economic and operational-technical criteria is determined by the expert method. An example of determining the vector of priorities, both criteria for comparison, and alternative energy-saving technologies by the analysis of hierarchies is given. The result of the study is a decision-making model for choosing the optimal energy-saving technology, taking into account the prospects for the operation of transport infrastructure buildings. The practical application of the results obtained is possible both in new construction and in the repair and reconstruction of buildings as an addition to the quality control system of design solutions.
Environmental analysis in bankruptcy diagnosing (the case of construction companies)
Authors: Guzikova Liudmila , Neelova Natalia , Ushakov Denis
Published: February 2023

The instability of the economic situation, combined with the systematically important nature of the construction industry, attracts attention to the financial viability of construction companies constituting the basis for the successful implementation of their activities in market conditions. The article examines the bankruptcy statistics of Russian construction companies, analyzes the issues of assessing and predicting insolvency and discusses the utility of applying well-known models, in particular, the Altman’s modified five-factor model, in Russian situation. The dynamics of the financial indicators used in the model and Altman's Z-score for construction companies belonging to the “construction of buildings” sector and different in scale of activity are analyzed. The groups of companies are represented by the conditional companies having the median value of all indicators, Conclusions are drawn regarding the probability of bankruptcy for companies belonging to different groups, and regarding the directions for improving the methods for diagnosing the bankruptcy of construction companies.
Technology of production of environmentally safe road pavements with new content by recycling tires
Authors: Omonov Makhmud , Djiyanbaev Sirojiddin , Umbarov Ibrahim
Published: February 2023

This scientific article proposes the technology of recycling tires and obtaining an environmentally safe finished product. In this, the technology of creating road pavements with a new composition through the composition of secondary tire shreds and interactive phosphogypsum components has been developed. Technological processes, new methods, ingredients are studied in the article. Researched in chemical methods.
Engineering method for calculating fluid flow in pipes with different cross sections in energy and technological processes
Authors: Dalabaev Umurdin , Hasanova Dilfuza
Published: February 2023

The flow of liquid through pipes with various configurations is found in many energy and technological processes. Knowledge of the distribution of velocity and flow through these pipes allows hydrological engineers to find resistance through the pipes and optimize the fluid pumping process. The article suggests a simple engineering method for finding the velocity over pipe sections
Aesthetic problems of revalorization of Yerevan "Small center" districts and landmarks
Authors: Sahakyan Mesrop Vardan
Published: February 2023

The article is aimed at the identification of problems related to the revalorization of the architectural-spatial environment of the districts and landmarks in Yerevan and the development of possible further recommendations. It has been shown that today in the process of development of the center, issues related to environmental approaches and architectural design are not sufficiently taken into account. As a result of the study of the world experience, the physical forms related to the image content were separated and studied, in particular, districts and landmarks, which are part of the main objects of aesthetic revalorization. The types of these objects were coordinated and classified according to their meaning and function. As a result of professional literature and field observation, surveys, the characteristics of the objects were distinguished, the elements of the objects were identified and coordinated, and evaluations were given according to the criteria of the value of the object. The results are the basis for proposing a set of basic principles and patterns for the aesthetic revalorization of the architectural environment.