bluuebunny/crossref_metadata_2025_split huggingface dataset:
Quantum signatures of chaos in relativistic quantum billiards with shapes of circle- and ellipse-sectors*
Authors: Yu Pei , Zhang Weihua , Dietz Barbara , Huang Liang 
Published: April 2022

AbstractAccording to the Berry–Tabor conjecture, the spectral properties of typical nonrelativistic quantum systems with an integrable classical counterpart agree with those of Poissonian random numbers. We investigate to what extend it applies to relativistic neutrino billiards (NBs) consisting of a spin-1/2 particle confined to a bounded planar domain by imposing suitable boundary conditions (BCs). In distinction to nonrelativistic quantum billiards (QBs), NBs do not have a well-defined classical counterpart. However, the peaks in the length spectra, that is, the modulus of the Fourier transform of the spectral density from wave number to length, of NBs are just like for QBs at the lengths of periodic orbits of the classical billiard (CB). This implies that there must be a connection between NBs and the dynamic of the CB. We demonstrate that NBs with shapes of circle- and ellipse-sectors with an integrable classical dynamic, obtained by cutting the circle and ellipse NB along symmetry lines, have no common eigenstates with the latter and that, indeed, their spectral properties can be similar to those of classically chaotic QBs. These features orginate from the intermingling of symmetries of the spinor components and the discontinuity in the BCs leading to contradictory conditional equations at corners connecting curved and straight boundary parts. To corroborate the necessity of the curved boundary part in order to generate GOE-like behavior, we furthermore consider the right-angled triangle NB constructed by halving the equilateral-triangle NB along a symmetry axis. For an understanding of these findings in terms of purely classical quantities we use the semiclassical approach recently developed for massive NBs, and Poincaré–Husimi distributions of the eigenstates in classical phase space. The results indicate, that in the ultrarelativistic limit these NBs do not show the behavior expected for classically chaotic QBs.
General symmetry operators of the asymmetric quantum Rabi model
Authors: Xie You-Fei , Chen Qing-Hu 
Published: April 2022

Abstract
The true level crossing in the asymmetric quantum Rabi model without any obvious symmetry can be exhibited in the energy spectrum if the qubit bias is a multiple of the cavity frequency, which should imply the existence of the hidden symmetry. In this work, within a Bogoliubov operator approach, we can readily derive the symmetry operators associated with the hidden symmetry hierarchically for arbitrary multiples. The symmetry operators for small multiples in the literature can be extremely easily reproduced in our general scheme. In addition, a general parity operator is defined through the symmetry operator, which naturally includes the well-known parity operator of the symmetric model. We believe that the present approach can be straightforwardly extended to other asymmetric Rabi models to find the relevant symmetry operators.
Study of insect diversity in areas surrounding The Central Marsh in southern Iraq
Authors: Kareem Ali , Aljaafari Raad K. , Abaas Manar A. , Al-Zurfi Sienaa M. , Fazaa Nadheer A. , Al-Sheikhly Omar F. , Haba Mukhtar K. , Whittingham Mark J. 
Published: April 2022

AbstractDuring the several visits in 2018 and 2019 to some areas surrounding Central Marsh in southern Iraq (CMSI) for conservation purposes. The fauna of insects from different sites and sessions of the CMSI are surveyed in this study; there were (18) species, (17) genera that belong to (16) families and (7) orders which are recorded in this investigation using sweeping nets and light traps. According to available references, 7 species are new records in the area of study. This is survey is important for updating insects diversity in central Marshlands in Iraq. A counting study is needed to understand more about insect distributions and their impacts on biodiversity in such an important area.
Solar Desiccant Cooling System as an Alternative Solution for Net-Zero Energy Buildings (NZEBs) in the Tropical Regions
Authors: Dezfouli M.M.S. , Kadir Kushsairy , Sopian K. , Dehghani-Sanij A.R. 
Published: April 2022

Abstract
The development of energy-efficient cooling systems is a major challenge for Net-Zero Energy Buildings (NZEBs) in tropical climates. This study proposes a solar-assisted two-stage hybrid desiccant cooling system as an energy-efficient air conditioning (AC) system for use in tropical NZEBs. TRNSYS software was used to simulate the proposed model for application in a classroom with a high latent load (51%). The simulation results were analysed in terms of air properties, energy allocation, and potential energy savings. It was discovered that using two-stage dehumidification instead of one-stage dehumidification reduced regeneration temperature from 72 °C to 63 °C, which leads to considerable reduction in backup heater energy consumption. This study shows that by means of the proposed model instead of a fan coil unit, thermal comfort and energy savings of 37% can be achieved.
Design of a solar PV plant for Ma’an, Jordan
Authors: Owhaib Wahib , Borett Alberto , AlKhalidi Ammar , Al-Kouz Wael , Hader Montasir 
Published: April 2022

Abstract
The manuscript proposes the design of a solar photovoltaic power (PV) plant for Ma’an, Jordan, a location of excellent solar energy resources. Both floating and ground-mounted plant configurations are presented. The ground-mounted plant configuration that showed maximum power out potential is modeled using System advisor Model (SAM) software to simulate the PV plant performance. Results showed that the proposed plant location at Ma’an site is an outstanding site with an annual average capacity factor is 32.2%. By considering a lifetime of 25 years, the Levelized Cost of Electricity LCOE is 3.54 c/kWh. Moreover, this will help and guide engineers and designers to comply with the country of Jordan’s most recent energy policy. This policy focuses on increasing the renewable energy share of the country.
Modeling the Energy Cooperation between Regionally Interconnected Aggregators using Bilateral Agreements
Authors: Ullah Zahid , Mirjat Nayyar Hussain 
Published: April 2022

Abstract
Traditional centralized power dispatching systems have inherent limitations in dealing with the increasing penetration of variable renewable energy generation in distribution networks. This study presents a flexible energy exchange mechanism for regionally interconnected aggregators in regards to VRE penetration. Direct energy exchange between neighboring aggregators is proposed as a promising method of maximizing social welfare (i.e. maximization of end-users benefits and minimization of energy costs). The main idea of the proposed mechanism is to develop a parallel energy exchange cooperation between physically connected aggregators ensuring operational efficiency of the power systems at a local level. Given that neighboring aggregators may have differences in their energy generation and usage patterns these differences can be utilized to bridge the mismatch of each other’s supply shortage. An operational scenario of regionally interconnected aggregators is presented and investigated. The initial simulation results have illustrated the effectiveness and reliability of the proposed model and method.
Hydrogeochemical characteristics of fresh waters in the springs of salt dome territories of the Cis-Urals region
Authors: Myazina N G , Savilova E B 
Published: April 2022

Abstract
The article presents the results of a study on the geochemistry of fresh water from natural sources (springs) in the salt dome territories of the Pre-Ural Artesian Basin. Spring waters are understudied; they are not classified according to their chemical composition and purpose. The research area is the territory of the Pre-Ural Artesian Basin in Orenburg Region with salt-gypsum tectonics. There are numerous springs with fresh water suitable for household and drinking purposes there. Springs with mineralization from 156 to 806 mg/dm3 of mixed composition, sulfate-chloride, sulfate-bicarbonate, bicarbonate and calcium and magnesium-calcium, sodium-magnesium-calcium are related to gypsum fields and salt dome structures. The total hardness varies from 3.5 to 10.27 mg/eq/l from moderately hard to extremely hard. The conclusion on the quantitative and qualitative assessment of spring waters should be made by prospecting and exploration activities with experimental filtration activities and assessment of reserves.
Comparative analysis of biodestructors used in bioremidation at land reclamation contaminated with
Authors: Tavadze B D , Valieva A F 
Published: April 2022

Abstract
The results shown in the article were held within a month apart from the preparatory period. Soil samples which were analyzed were contaminated with certain amount of oil. After that certain amount of biodestructors were put into the samples. Ability of organisms, contacting in these chemicals, to decompose oil was determined by condition and quantity of siderates (barley, rye, clover), and also by oil percentage in analyzed soil samples. Quantitatively oil content in samples before and after biological treatment was determined by infrared spectrometry using “Koncentratometr KN-3” analyzer. Based on the obtained quantitative results of oil content in soil samples before and after exposure to them with biodestructors we may conclude positive dynamics of their effect. Results showed that after only two weeks of microorganisms’ influence the oil content in soil samples decreased by half. It should be noted that the best results after only two weeks of usage were shown by Bak-Verad and DOP-UNI. The positive effect also affected the siderats’ appearance. Condition and number of grown plants correlates satisfactorily with the residual percentage of oil in the soil samples. The best results during one month were shown by Glauk-Oil. The results of the research can find application in bioremediation in the reclamation of lands contaminated with oil in the conditions of the far north and conditions equivalent to it.
Influence of precursors on water regime indicators, soil infestation and productivity of spring oats
Authors: Avdeenko A P , Avdeenko S S 
Published: April 2022

Abstract
In the conditions of the Rostov region of the Russian Federation on ordinary micellar-carbonate chernozems, the influence of winter wheat and sunflower as precursors of spring oats on the parameters of the water regime, the structural and aggregate composition of the soil, its weediness and biological activity in oat crops was studied. The issues of formation of yield structure indicators depending on the predecessor and its influence on the biological yield of oats are considered. It was found that a greater amount of soil moisture both before sowing and during the growth and development of oat plants was after winter wheat due to the optimization of soil structure and its biological activity. Sunflower promotes clogging of the soil under oats and reduces the number of agronomically valuable soil aggregates, as a result of which the grain yield was lower than after winter wheat by 0.21 t/ha. Favorable conditions for the growth of oat plants after winter wheat are manifested in an increase in the number of productive stems compared to the predecessor sunflower by 15%.
Evaluate of tomato growing in the conditions of subirrigation aeroponics at Fitopiramida greenhouse
Authors: Farawn K K , Leunov V I , Tereshonkova T A , Salman A H , Al-Rukabi M N M , Shaaban F 
Published: April 2022

Abstract
Aeroponics and hydroponics technologies are one of the most advanced today. The aim of this work is to select and assess the assortment of determinant tomatoes for suitability for cultivation under the conditions of this technology. The study was conducted on the crop of two specific hybrids of different foliar dressings, as well as the assessment of the level of interaction «variety-option of feeding» based on the statistical analysis of the results. The article discusses the features of two methods of the aeroponics and Fitopyramida soilless technology in the context of solving the problems of resource and energy conservation in the production of vegetables. It is applied in agriculture to plan the several activities and missions properly by utilizing limited resources with minor human interference. The aim of this work is to evaluate the effectiveness of non-root top dressing and to identify the optimal habitus and other characteristics of the determinant tomato hybrid for the “Fitopiramida” technology. A greenhouse research project was conducted at All-Russian Scientific Research Institute of Vegetable Growing - a branch of the Federal State Budgetary Scientific Institution “Federal Scientific Center of Vegetable Growing” (VNIIO - a branch of FGBNU FNTSO). This study was revealed that 2 foliar dressing at a dose (N: P: K 10:54:10) 2.5 g/l + Maxifol 2g/l ) have a significant impact on productivity and yield determinant hybrids of tomato Flame F1 and Rosana F1, providing yield increase in comparison with the control by 7.87 kg/m2 and 2.52 kg/m2, respectively. Among the investigated options for the use of mineral fertilizers, the most maximum and reliable results were obtained in the 3NPK option; on the basis of statistical processing, the optimal variant of the interaction «variety-level of mineral nutrition» was established - hybrid F1 Rozanna against the background of 3NPK.
Prediction of hazardous fire factors and their impact on the ecology of the region
Authors: Sh Arifzhanov A , Muhamediyeva D K , Khasanov U U 
Published: April 2022

Abstract
Natural fires are a serious catastrophic phenomenon for the nature and population of our country and the world. The paper considers the forecast of the level of air pollution, which is possible based on calculating the dispersion of pollutants in the atmosphere and a comparative assessment of the magnitude of the impact with existing standards.
Problems of biodiversity conservation of birch groves of the steppe Ural zone
Authors: Getmanec I A , Serebrennikova Y A , Levchenko P V 
Published: April 2022

Abstract
An assessment of the taxonomic, structural, and functional biodiversity of birch groves of the steppe Ural zone which are unique phytocenoses that determine the structure of forest cover in areas with a regular lack of forest cover, is presented. Such communities play an important role in maintaining the ecological balance of the natural environment, namely in preserving biological and landscape diversity due to the formation of communities in contrasting physiographic conditions. We used the classical standard approaches of geobotany and the original methods of phytoindication of ecotopes, and the analysis of the aggregate parameters of the environment of ecocenoelements on the scales of the optimum of H. Ellenberg. The ecosystem function of biodiversity conservation is shown due to the formation of microsites: birch grove, feather grass steppe, willow community, petrophyte-steppe associations, at the contact points of which ecotone zones appear, differing due to the differentiation of physiographic conditions of great variety and sustainability of natural complexes. The necessity of preserving the complex of birch beam forests with a special aesthetic, scientific and cultural value for the conservation of biodiversity is shown.
Recycling of sugar beet production wastes in the agroecosystems of the Central Chernozem Region
Authors: Koltsova O M , Stekol’nikova N V 
Published: April 2022

Abstract
The results presented in the paper allow to solve environmental problems arising from the disposal of waste (bagasse and defecate) of sugar beet production. Experimental data of soil fertility indicators of leached chernozems are presented: moisture, soil acidity, nutrient content during utilization of sugar beet pulp and defecate in agrocenoses compared with the background of mineral fertilizers. The most favorable abiotic conditions were formed on the variants of pulp application at a dose of 50 t/ha in autumn. It was revealed that the increase in the acidity of leached chernozem after the introduction of pulp is of a short-term nature. Using defecate together with manure stabilizes the acidity to a level of 6.0–6.2, maintaining this value for a long period (10–12 years). At the same time, the yield of winter wheat was practically the same as the crop gained according to the traditional for the Central Black Earth Region technology. Thus, the possibility of using wastes as fertilizers has been established, which solves the ecological problem of their utilization and, as a consequence, the problem of increasing the fertility of arable land.
The use of caesium-137 to assess soil losses from agricultural fields (Orel region)
Authors: Trofimetz L N , Kurochitskaya M G , Alexandrova A P , Saraeva A M , Lavrusevich A A 
Published: April 2022

Abstract
The paper presents the results of experimental studies of the intensity of overburden delivery from agricultural fields in the districts of the Orel region for the period from 1963 to 2020. The isotope of cesium-137 of global and Chernobyl origin was used to detect at depth the overburdens that came from the fields to the depression complex in 1963, 1986, and 2020. According to the thickness of the overburden layer, the intensity of overburden delivery was determined for the periods 1963-1986 and 1986-2020. The authors found that in 1963-1986, the intensity of soil material losses from arable land was 2.00 cm/year in Znamensky district, 1.83 cm/year in Mtsensky district, and 1.56 cm/year in Orlovsky District. In the period 1986-2020, there was a significant decrease in the rate of erosion. Soil losses in the fields of Znamensky district decreased by 6.9 times; in the fields of Mtsensky district – by 3.89 times; Orlovsky district – by 1.56 times. The decrease in the intensity of soil losses is explained by the increase in the frequency of thaws in the winter season in 1986-2020 compared with 1963-1986. In 1963-1986, the number of years with the maximum monthly temperature in January and February above zero degrees did not exceed 5-7. In 1986-2020, the number of such years increased to 17-19. Reduction of soil freezing and a decrease in melt runoff led to a reduction in soil losses.
Experimental simulation of micro-electroosmosis in porous structures of food products
Authors: Nikolaev N S , Ya Burlev M , Kornienko V N , Motin V V 
Published: April 2022

Abstract
One of the modern directions in the intensification of heat and mass exchange processes widely used in processing of agricultural products is characterized by the use of the electric field in a certain range of its action. A special feature of the electric field impact on agricultural raw materials for food product manufacture is the emergence of micro-electrokinetic phenomena such as micro-electroosmosis. For the effective use of this direction, an experimental study of the character of the electric field interaction with raw materials of biological origin is necessary. The process of micro-electroosmosis in a form of the liquid movement in micro-capillaries depending on the parameters of weak electropulse impacts of a certain frequency is modeling in the study. The obtained experimental results make it possible to trace kinetics of process parameters for the liquid movement in micro-capillaries upon various characteristics of the electric field and understand possibilities of using micro-electroosmosis for intensification of heat and mass exchange processes.
A new algorithm in determining the effectiveness of sustainable agricultural land use management at various administrative-territorial levels
Authors: Zhdanova R V , Rasskazova A A , Smirnova M A , Ruleva N P , Borodina O B 
Published: April 2022

Abstract
The relevance of the study is due to the interest and all emerging requests for the creation of a perfect land use system based on the principle of sustainability. In the article, the authors revealed the concept of sustainability of agricultural land use. And we considered the methodology for determining the efficiency of agricultural land use. The analysis of the conditions of agricultural land use and the identification of factors influencing the efficiency of agricultural land use are carried out. The authors paid special attention to the consideration of criteria and a system of indicators of the effectiveness of sustainable agricultural land use management. In addition, the report focuses on the role of agricultural land use planning and identifies the main planning and forecasting methods for determining the effectiveness of agricultural land use.
Devices for trimming trees in urban areas
Authors: Mokhirev A P , Rukomojnikov K P , Ye Ariko S , Iliushenko D A , Kalyashov V A , Tikhonov E A 
Published: April 2022

Abstract
In an urban area, the care of large trees is problematic. When they age, branches, peaks should be trimmed. The use of logging machines is hampered by their large size and also significantly pollutes the urban environment, due to significant emissions of harmful substances into the atmosphere. In addition, the felling and delimbing process itself is not safe, and its use in an urban environment poses a threat to human life, the integrity of buildings and infrastructure. In most cases, to solve such problems, special workers (arborists) are used, who either climb onto the tree trunk, or are in the crane basket and cut the tree piece by piece. Such technologies are costly, unsafe and, at times, can cause inconvenience to others. The design and a detailed algorithm for the operation of a device are presented, which allows you to cut branches and trunks of trees and ensure their controlled descent to the ground without a threat to people and infrastructure. In this case, the operator controls the installation remotely. The device consists of movement and delimbing mechanisms, a chain saw for pruning large branches and tree tops, and a system for lowering the cut parts to the ground. The analysis showed that the proposed device is more effective than its counterparts and tree pruning by arborists.
Effect of micro fertilizers on productivity and quality of lactuca-sativa varieties
Authors: Avdeenko S S , Avdeenko A P 
Published: April 2022

Abstract
In the conditions of the Rostov region on ordinary chernozems, the effect of micro fertilizers used for foliar feeding when growing lactuca-sativa varieties in open ground under irrigation was studied. The issues of formation of yield and quality indicators depending on the applied micro fertilizers are considered. It was established that the largest yield was obtained when growing the Yeralash variety, the crops of which were additionally treated with Ecofus at a dose of 2 l/ha, and slightly lower values when using Siliplant at a dose of 1 l/ha. The most significant effect in increasing the dry matter content was found with the use of the Nagro preparation for the varieties Eralash, Gascony and Abrek, and early ripening of the products did not contribute to an increase in the dry matter content in the varieties. The use of Siliplant and Nagro effectively increases the content of ascorbic acid in the product, reaching a maximum for the Gascony variety. Additional top dressings do not have a negative impact on the amount of nitrates, and the minimum indicators were noted for the varieties Sorvanec, Abrek and Gascony when treated with Siliplant and Nagro preparations.