bluuebunny/crossref_metadata_2025_split huggingface dataset:
Antimicrobial Acylphloroglucinol Meroterpenoids and Acylphloroglucinols from Dryopteris crassirhizoma
Authors: Hai Ping , He Yunqing , Wang Ruirui , Yang Jian , Gao Yuan , Wu Xudong , Chen Nie , Ye Li , Li Rongtao 
Published: August 2022

AbstractTen novel meroterpenoids, dryoptins/11″-epi-dryoptins A~E (1~10) with an unprecedented skeleton consisting of dimeric or trimeric acylphloroglucinols and
dehydrotheonelline, two undescribed acylphloroglucinol-nerolidol meroterpenoids (11~12), and ten known acylphloroglucinol derivatives (13~22), were isolated from
D. crassirhizoma. The novel structures including absolute configurations were established by comprehensive spectroscopic analyses and quantum chemical electronic circular dichroism
(ECD) calculations. A biosynthetic pathway of 1~10 was assumed. The trimeric acylphloroglucinol meroterpenoids 7/8 showed significant antifungal activity against
standard Candida albicans with a MIC50 value of 1.61 µg/mL [fluconazole (FLC): 3.41 µg/mL], and when combined with FLC, the principal components 20 and 21
exhibited strong antifungal activities against FLC-resistant C. albicans with MIC50 values of 8.39 and 7.16 µg/mL (FLC: > 100 µg/mL), respectively. Moreover, compounds
2, 5/6, 18, 19, and 21 exhibited inhibitory effects against several pathogenic fungi and bacteria, with MIC50 values of 6.25 ~ 50 µg/mL.
Whiteness and/as war
Authors: Gregory Joshua R. 
Published: August 2022

AbstractViewed as the sociogenetic product of the violent instinct and historical racialization, whiteness shares the psychoanalytic impetus that also subtends the cycle by which modern war originates and repeats, seemingly perpetually and indomitably. Relating whiteness to war in this way urges a reconceptualization that generates a series of novel insights that cohere as a tripartite theory which spans the dimensions ofwhatwhiteness is,why, andhow. Ultimately, this leads to a refined understanding that apprehends the distinction between whiteness and war to represent a difference of degree, not kind, and consequently suggests a possibility of liberation from white hegemony through collectively reorienting to whiteness as a melancholic object.
Λ
b
→ Λ
c
form factors from QCD light-cone sum rules*
Authors: Miao Yan , Deng Hui , Huang Ke-Sheng , Gao Jing , Shen Yue-Long 
Published: August 2022

Abstract
In this study, we calculate the transition form factors of

decaying into

within the framework of light-cone sum rules with the distribution amplitudes (DAs) of the

-baryon. In the hadronic representation of the correlation function, we isolate both the

and

states so that the

form factors can be obtained without ambiguity. We investigate the P-type and A-type currents to interpolate light baryons for comparison because the interpolation current for the baryon state is not unique. We also employ three parametrization models for the DAs of

in the numerical calculation. We present the numerical predictions for the

form factors and branching fractions, averaged forward-backward asymmetry, averaged final hadron polarization, and averaged lepton polarization of the

decays, as well as the ratio of the branching ratios

. The predicted

is consistent with LHCb data.
Radiation hard 3D silicon pixel sensors for use in the ATLAS detector at the HL-LHC
Authors: Heggelund A.L. , Huiberts S. , Dorholt O. , Read A.L. , Rohne O. , Sandaker H. , Lauritzen M. , Stugu B. , Kok A. , Koybasi O. , Povoli M. , Bomben M. , Lange J. , Rummler A. 
Published: August 2022

Abstract
The High Luminosity LHC (HL-LHC) upgrade requires the
planned Inner Tracker (ITk) of the ATLAS detector to tolerate
extremely high radiation doses. Specifically, the innermost parts of
the pixel system will have to withstand radiation fluences above
1 × 1016 neqcm-2. Novel 3D silicon pixel
sensors offer a superior radiation tolerance compared to
conventional planar pixel sensors, and are thus excellent candidates
for the innermost parts of the ITk. This paper presents studies of
3D pixel sensors with pixel size 50 × 50 μm2 mounted
on the RD53A prototype readout chip. Following a description of the
design and fabrication steps, Test Beam results are presented for
unirradiated as well as heavily irradiated sensors. For particles
passing at perpendicular incidence, it is shown that average
efficiencies above 96% are reached for sensors exposed to fluences
of 1 × 1016 neqcm-2 when biased to 80 V.
A low-order dynamical model for fire-vegetation-climate interactions
Authors: Kim Soong-Ki , Timmermann Axel , Kim Jin-Soo , Olson Roman , An Soon-Il 
Published: August 2022

Abstract
Climate conditions play a key role in determining the occurrence and severity of wildfires. Despite the impacts of wildfires on ecosystems, human livelihoods, and air quality, little is known conceptually about how natural or anthropogenic shifts in climate may influence the fire activity on a regional or global scale. Here, we introduce a new low order dynamical model that describes the nonlinear interactions between climate, vegetation (fire fuel) and fire probabilities. This 1-dimensional model describes the influence of precipitation and temperature on burned area and fuel availability. Estimating key parameters from observations, the model successfully reproduces the spatio-temporal variability of wildfire occurrences, particularly, in semi-arid regions in Africa, South America, and northern Australia. The fidelity of the model translates into a high degree of longer-term predictability of fire conditions in these vulnerable regions. Our new low-order modeling framework may provide guidance to forestry managers to assess fire risks under present and future climate conditions.
Development of models for functioning of a universal service center in agriculture of Uzbekistan
Authors: Djiyanov M , Tadjibekova I , Temirkulova N 
Published: August 2022

Abstract
The expediency of creating a universal service center (USC) in a specific agricultural region has been revealed hereby. Its tasks have been substantiated as an executive of technical services. Basing on the formulated tasks, the structure of the operation of the USC has been developed within the framework of the system “Plant – service executive – consumer of the service”. The methods for determining the rational location of the USC in the territory of a particular region have been developed and implemented. An example of calculation of the functioning parameters of a universal service center has been presented. It was revealed that the economic effect of the USC would be achieved by reducing the route of mobile service workshops in the process of providing services to cars.
Influence of erosion on the mechanical composition and physical properties of serozems on rainfed soils, Tashkent province, Uzbekistan
Authors: Juliev M , Matyakubov B , Khakberdiev O , Abdurasulov X , Gafurova L , Ergasheva O , Panjiev U , Chorikulov B 
Published: August 2022

Abstract
The problem of soil protection from erosion is relevant for many countries in the arid zone of the world, including the territory of Uzbekistan. In the republic, the main arrays of crops are located on rainfed lands, where the crop is created only due to moisture in precipitation. The amount of porosity (duty cycle) of soils is determined mainly by specific and bulk mass, mechanical composition, and humus content. Porosity of soils decreases from unwashed soils to washed away and down the profile. In the arable horizons of unwashed rainfed soils, it is 52%, washed out - 47.49%. Deeper in the profile, in horizons transitional to soil, due to a sharp increase in density and a decrease in the humus content in all soils, regardless of erosion, Porosity sharply drops to 48-50%. Thus, with a small bulk mass, the overall porosity of rainfed typical serozems is generally satisfactory, since it provides good soil aeration and the use of precipitation, only on highly washed away soils the porosity decreases markedly and the absorption of precipitation is slightly worsened.
Soil-borne plant pathogenic fungi biodiversity of sunflower
Authors: Sodikov B , Khakimov A , Rakhmonov U , Omonlikov A , Gulmatov R , Utaganov S 
Published: August 2022

Abstract
Diseases caused by soil-borne phytopathogenic fungi are a serious problem for agricultural crops, including sunflower crops. The limited possibilities of measures to control them further increases the interest and focus on them. This article reveals data on the species composition, occurrence rate of soil-borne plant pathogenic fungi isolated from the soil of sunflower. Here, 11 species of true fungi and 1 species of oomycetes have been isolated. The highest incidence rate was recorded in the Fusarium oxysporum fungi species. During the study, pathogenic fungi specific to sunflower have also been isolated.
Features of physico-chemical parameters of local varieties of lentil grains in Uzbekistan
Authors: Khamidova F Y , Yormatova D Y , Kh Majidov K , Bokijonov M M 
Published: August 2022

Abstract
In Uzbekistan, special attention is paid to the cultivation of lentils and such types of grain are characterized by high quality indicators and physicochemical characteristics. In Uzbekistan, special attention is paid to the cultivation of lentils. Such types of grain are characterized by high quality indicators and physicochemical characteristics. The physico-chemical parameters of local varieties of lentil grains were studied. The technological characteristics of lentil grains were established, the distinctive characteristics of lentil grains in comparison with well-known varieties have been determined. It was found that in the process of deep processing of lentil grain to obtain a protein isolate, proteins retain their native conformation, as evidenced by the position of the absorption bands Amide I, Amide II and Amide III in the analysis of IR spectra.
Valuable economic traits of F3 hybrids of medium-fiber cotton
Authors: Kh Akhmedov D , Jabborov J S , Mannopov R S 
Published: August 2022

Abstract
Today, a cluster system has been established in Uzbek cotton industry for the cultivation of agricultural crops. This cluster system includes the processes from sowing the seeds to harvesting, processing, obtaining and selling the finished product. Today, there is a growing demand for varieties with high fiber yield and length, as well as other quality indicators of fiber. In this regard, this research focused on creating raw materials with high fiber consumption and quality. In this research, the results of several years of researches on F2 hybrids, which obtained on the basis of parental forms with high fiber yield and length selected from 12 F3 hybrid families, were analyzed and studied. Besides, Namangan-77 cotton variety was selected as a standard variety. The research results showed that the standard for fiber yield was observed in Namangan-77 cotton variety 35.1%, in the remaining 10 hybrids, except for hybrids 5 and 12, from 36.0% to 42.2%, and the highest rate was F3 CP-2532 x Jarkurgon hybrid. 42.2% in the family, which is 7.1% higher than the standard navigation. In terms of fiber length, the standard variety was 35.0 mm, while all other 12 hybrid families had fiber lengths ranging from 35.3 mm to 37.2 mm, 0.4 mm to 2.5 mm longer than the standard variety, and these hybrids were used as donors.
Determination and assessment of water resources balance of Aydar-Arnasay Lake System in Uzbekistan
Authors: Kulmatov R , Ruzikulova O , Taylakov A 
Published: August 2022

Abstract
Determining and assessing the water balance of the Aydar Arnasay Lakes System (AALS) is important for the development of fisheries, ecotourism and efficient use of water resources in the region. The amount of water included in the water balance of the AALS is the addition of Syrdarya water, collector drainage water, snow-rain and groundwater, which are poured into the lake system through the Chordara reservoir. The amount of water released from the lake system includes water released from the water basin by evaporation into the atmosphere, used for infiltration and irrigation. The article identifies and evaluates changes in the amount of AALS water balance for 2004-2018.
Analysis of the danger of thermal radiation of a spherical flame
Authors: Kanareykin A I 
Published: August 2022

Abstract
A new mathematical model of spherical flame propagation during emergency emission and ignition of mixtures of hydrocarbon gases in an open space has been developed. A comparative analysis of the results of the study made it possible to establish the main mechanisms of heating of a combustible gas mixture as a result of radiation from gorenje products. As a result of mathematical modeling, the resulting radiation model meets the real gorenje conditions of gas-air mixtures.
Experimental study of the dissociation of a double gas hydrate with a change in the initial height of the layer
Authors: Morozov V S 
Published: August 2022

Abstract
In this work, experimental studies of the dissociation of methane-ethane hydrate with and without combustion are carried out with a change in the initial height of the layer. Gas hydrate powder with an initial height of 3 and 15 mm was used. In the samples, the initial concentration of methane is 64% and ethane is 36%. An increase in the initial height of the powder layer led to a 1.3-fold increase in the flame front velocity. Due to the increase in the initial height of the layer, the dissociation rate decreases by 7.2 times before combustion and by 4.1 times during combustion.
Energy of the region: some conditions necessary for its development in the Central Asian region
Authors: Sharipov U A , Boboev F J , Khusainov M N , Gulakov U M , Saidova M J 
Published: August 2022

Abstract
The level of development is largely determined by the effectiveness of its individual structural elements and is strengthened under the influence of a number of factors. Among them, a special place is occupied by the problems of the optimal mechanism for the development of natural energy resources, which form the basis of the national strategy. In this regard, taking into account the peculiarities of the state and prospects for the development of the resource potential of Tajikistan and the entire Central Asian region, it became necessary to search for new forms of exploitation of natural and energy resources, since in our conditions, only the optimal development of the energy sector in the direction of developing mechanisms for the formation of the energy sector of the entire Central Asian region gives a chance to change the situation. However, in this area of the national economy there are a number of unresolved problems, which include: a low level of energy supply to the population of the regions, a high level of electricity losses, both during its transmission and during its use, insufficient electricity production in the presence of a resource component. The complex of these problems can be solved by a systematic method, one of which is the study and development of mechanisms for the formation of energy clusters in the Central Asian region, and the dynamic development of cluster formations of hydropower resources. In this regard, the study is aimed at studying current trends in the development of energy resources in the context of determining the prospects and mechanisms for the formation of an energy cluster in the Central Asian region and their application in the conditions of Tajikistan, which predetermines the relevance and relevance of the study.
On models of wave processes in geological structures with the presence of a interlayer water
Authors: Pavlova A V , Rubtsov S E , Telyatnikov I S 
Published: August 2022

Abstract
The theory of seismic processes, as well as the solution of applied problems of vibrational geophysics and seismology, are associated with the study of wave processes in the structures of the crustal level. In this work we considered a layered structure, including a layer of liquid with coating in the form of an elastic layer, as a model of the geological environment. An algorithm for constructing wave fields in a two-layer medium, caused by harmonic oscillations of a concentrated source, is presented. The research method is based on the use of the integral Fourier transform. Examples of calculation of mechanical characteristics for a model problem are given.
Analysis of chromogenic materials for angular-selective smart windows with efficient use of solar energy
Authors: Zakirullin R S , Odenbakh I A 
Published: August 2022

Abstract
This paper analyzes the achievements in recent years in the development of chromogenic materials and technologies, with a special emphasis on those that would be most effective for use both in conventional smart windows with a single continuous chromogenic layer, developed since the 1990s, and in grating smart windows, the development of which began in the 2010s. The latter have some advantages in creating a comfortable indoor lighting environment, such as angle-selective limitation of the transmission of direct solar radiation while increasing the transmission of sky-scattered radiation and radiation reflected from the ground and the facades of opposing buildings. The angular selectivity of a grating smart window is ensured by alternately passing direct sunlight through thin-film gratings with alternating transmissive and chromogenic strips on two window surfaces. Among the variety of chromogenic technologies, the most promising ones for smart windows of both types were identified. Taking into account the technological features of manufacturing grating windows, the possible cost of this technology was preliminary estimated.
Annual thermal performance of a passive solar heating system with a Trombe wall with phase change materials
Authors: Samiev K A , Mirzaev M S , Ibragimov U X 
Published: August 2022

Abstract
In this work, the potential of a passive solar heating system with a Trombe wall with phase change materials for the climatic conditions of Uzbekistan was evaluated. A dynamic mathematical model has been developed, and validation has been carried out by comparing experimental data. The annual thermal characteristics of a three-room residential building, a three-room residential building with a Trombe wall, a three-room residential building with a Trombe wall with phase-change heat accumulator materials are determined. Calculations show that the specific energy consumption for heating a 3-room residential building is 211 kW·hr/m2·year, and the energy consumption for heating such an object with a Tromba wall installed on the southern wall is 134.3 kW·hr/m2·year, the energy consumption for heating such an object with the Trombe wall installed on the southern wall with phase change materials are 91.8 kW·hr/m2 year. This means that the use of the Trombe wall system will lead to a reduction in energy consumption by at least 36%. The average value of the thermal efficiency of the Trombe wall for the heating period is 37.08%, and the average value of the thermal efficiency of the Trombe wall with phase change materials for the heating period is 52.6%.
Environmental justification for the use of solar panels and batteries as an alternative energy source
Authors: Chernysheva N V , Frantseva T P , Osepyan Y. , Chernyaeva A A , Sukhomlinova A G 
Published: August 2022

Abstract
The article considers the relevance of using solar panels on the roof of a hypermarket. The cost calculation and the scheme of installation of panels, their profitability and payback are made. The advantages of using bat ray from the point of view of an environmentally friendly energy source are considered.
Building models for forecasting energy consumption using a fuzzy knowledge base and a regression model
Authors: Muhamediyeva D T 
Published: August 2022

Abstract
The main purpose of the work is to build models for forecasting energy consumption. With the goal in mind, the problems of building energy consumption models are solved using the Sugeno fuzzy knowledge base and the regression model. The presentation of the material is carried out on the example of constructing a fuzzy model of the dependence of energy consumption on the number of population and gross domestic product (GDP). It is necessary to find out how energy consumption depends on the population, GDP, and the price of oil. The synthesized fuzzy model will have one output and three inputs.
Prospects for the development of the oil and gas sector in the Russian Federation
Authors: Zhichkin K , Zhichkina L , Moskaleva M , Sharipov F F , Dikikh V A , Mozgovoy A I , Britvina V V 
Published: August 2022

AbstractThe purpose of the study was to predict the prospects for the development of this sector. As part of this, the following tasks were set: - to analyze the state of oil and gas production in Russia and the world; - to determine the factors affecting the economic efficiency of oil and gas production; - predict the level of production in the medium term. Currently, Russia ranks 2nd in terms of oil and gas production, and in terms of reserves - 7th and 1st respectively. Oil and gas production enterprises play an important social role, providing employment for a significant number of the population, high incomes, and maintenance of social facilities. Industry enterprises have shown high resilience to external influences during the COVID-19 pandemic and the Ukrainian crisis.
Prospects for the development of mobile equipment for adding and mixing additives
Authors: Iovleva E L , Androsov L A , Cherin I V 
Published: August 2022

Abstract
In winter, food and essential goods are delivered to remote settlements of the Republic of Sakha (Yakutia) by winter roads. As a rule, such long routes are driven by cars running on a diesel engine. Despite the difficulties in operating diesel vehicles in extremely low temperatures, diesel vehicles are much more powerful and more economical than gasoline ones. Problems with the start and operation of a diesel engine are associated with the low-temperature properties of diesel fuel. In the article, we considered the possibility of developing portable equipment for introducing and mixing a pour point depressant with fuel in the real conditions of the Far North. We have described a block diagram and a functional diagram of such equipment. In the plant being designed, we have included the possibility of heating the fuel and additives, the filtration system, the control panel and the safety of the system.