bluuebunny/crossref_metadata_2025_split huggingface dataset:
Evidence of decoupling of surface and bulk states in Dirac semimetal Cd3As2
Authors: Yu W , Rademacher D X , Valdez N R , Rodriguez M A , Nenoff T M , Pan W 
Published: June 2022

Abstract
Dirac semimetals have attracted a great deal of current interests due to their potential applications in topological quantum computing, low-energy electronic devices, and single photon detection in the microwave frequency range. Herein are results from analyzing the low magnetic (B) field weak-antilocalization behaviors in a Dirac semimetal Cd3As2 thin flake device. At high temperatures, the phase coherence length l
ϕ first increases with decreasing temperature (T) and follows a power law dependence of l
ϕ ∝ T
−0.4. Below ∼3 K, l
ϕ tends to saturate to a value of ∼180 nm. Another fitting parameter α, which is associated with independent transport channels, displays a logarithmic temperature dependence for T > 3 K, but also tends to saturate below ∼3 K. The saturation value, ∼1.45, is very close to 1.5, indicating three independent electron transport channels, which we interpret as due to decoupling of both the top and bottom surfaces as well as the bulk. This result, to our knowledge, provides first evidence that the surfaces and bulk states can become decoupled in electronic transport in Dirac semimetal Cd3As2.
Sensitivity improvement of hybrid active layer containing 2D nanoplatelets for indirect x-ray detector
Authors: Lee Jehoon , Yoo Kyunghan , Liu Hailiang , Kang Jungwon 
Published: June 2022

Abstract
In this paper, we attempted to improve the detection sensitivity of an indirect x-ray detector through using a hybrid active layer composed of a poly [N-90-heptadecanyl–2,7-carbazole-alt-5,5-(40,70-di-2-thienyl-20,10,30-benzothiadiazole)] (PCDTBT) organic semiconductor and cadmium selenide nanoplatelets (CdSe NPLs) colloidal inorganic semiconductors. First, different blending ratio in the active layer (i.e. 2:1, 1:1, 1:2 and 1:3) of PCDTBT:CdSe NPL were examined, a sensitivity of 89.5 μC·Gyair
−1·cm−2 was achieved using a 1:1 ratio due to the low series resistance (RS
) and defect density in this configuration. Then, the oleic acid (OA) that was initially applied in the CdSe NPL surface was replaced with pyridine ligands, this was done because the pyridine ligand is a short-chain ligand that can help charge transfer by reducing the distance between NPLs in the active layer. In addition, an experiment was conducted to determine the optimal ligand exchange time. A detector with an PCDTBT:CdSe NPL active layer fabricated using pyridine ligand exchange achieved a sensitivity of 219.8 μC·Gyair
−1·cm−2 after an exchange time of 12 h, this is an improvement of 155% compared to the detector using a PCDTBT:CdSe NPL with the original OA ligands. Lastly, the optimal thickness for the PCDTBT:CdSe NPL active layer was investigated. The highest mobility of 7.60 × 10− 6 cm2/V·s was recorded after fabricating the layer using spin-coating at 1900 rpm, the highest sensitivity of 314.0 μC·Gyair
−1·cm−2 was also achieved under these conditions. Compared to the initial state of the detector, our modifications improved the sensitivity of the PCDTBT:CdSe NPL detector by 251%.
Repeatability of ventilatory, metabolic and biomechanical responses to an intermittent incremental swimming protocol
Authors: Monteiro Ana Sofia , Carvalho Diogo D , Elói Ana , Silva Francisco , Vilas-Boas João Paulo , Buzzachera Cosme F , Fernandes Ricardo J 
Published: June 2022

Abstract

Objective. This study aimed to determine the repeatability of ventilatory, metabolic and biomechanical variables assessed at a large spectrum of front crawl swimming intensities. We hypothesized a strong agreement (combined with a small range of variation) between a typical step protocol performed in two experimental moments. Approach. Forty competitive swimmers performed a 7 × 200 m front crawl intermittent incremental protocol (0.05 m·s−1 velocity rises and 30 s intervals) on two different occasions (48–72 h apart). Pulmonary gas exchange and ventilation were continuously measured breath-by-breath, metabolic variables were assessed during the intervals and biomechanical analysis was done at every protocol step. Main results. Concomitantly with the velocity increment, oxygen uptake, carbon dioxide production, ventilation, respiratory frequency, respiratory exchange ratio, averaged expiratory concentrations, end tidal oxygen and ventilatory equivalents for oxygen and carbon dioxide and blood lactate concentrations rose (p < 0.001), averaged expiratory concentrations and end tidal carbon dioxide and duration of inspiration, expiration and total breathing cycle decreased (p < 0.001), while tidal volume and volumes of oxygen and carbon dioxide expired maintained constant. Stroke frequency and stroke length increased and decreased (respectively) with the swimming velocity raise. No differences between experimental moments were observed in most of the assessed variables (p > 0.05), with a low dispersion (0.49%–9.94%) except for lactate concentrations and inspiration and expiration durations (11.00%–17.16%). Moderate-nearly perfect direct relationships and a good-excellent degree of reliability between moments were verified for all the assessed variables (r = 0.50–1.00, ICC = 0.76–1.00, p < 0.001), except for respiratory exchange ratio. Significance. The reliability analysis confirmed the repeatability of the assessed ventilatory, metabolic and biomechanical variables, with the obtained data well representing swimmers physiological condition when monitoring performance through a commonly used step protocol.
Ion confinement efficiency and ionization balance in a complex DC discharge plasma
Authors: Polyakov D N , Shumova V V , Vasilyak L M 
Published: June 2022

Abstract
We consider the efficiency of an ion confinement inside a cloud of charged microparticles in a low-pressure DC discharge. To describe the ion confinement efficiency in such complex plasma, we propose the indicators calculated taking into account the processes responsible for the generation, the losses, and the accumulation of ions in a cloud of charged microparticles in a plasma using a fluid model. The efficiency of ion accumulation by a microparticle cloud shows the ratio of the average ion densities in discharge with microparticles and without them. The efficiency of ion accumulation by a microparticle shows the difference of average ion densities in a discharge with microparticles and without them, related to microparticle number density. The specific power costs of the existence of one ion in a microparticle cloud determines the linear power costs of the discharge in a cloud related to the linear number of ions in it. The power efficiency of ion accumulation by a microparticle cloud is defined as a ratio of specific power costs in a discharge without microparticles, to specific power costs of ion existence in a cloud. A strong dependence of indicators on the microparticle number density has been revealed. Inefficient conditions of ion confinement inside a cloud are found. Experimental data on dynamic instabilities of a discharge with microparticles was analyzed. It is found that efficiency of ion confinement is connected with dynamic processes in complex plasma. The limiting microparticle number density is shown to serve as the criterion of the occurrence of plasma instability. Exceeding the limiting microparticle number density results, generally, in the development of dynamic instability of complex plasma, and, in inefficient states, in quenching of the discharge.
Experimental verification of trade-off relation for coherence and disturbance
Authors: Gao Huixia , Xiao Lei , Wang Kunkun , Qu Dengke , Lin Quan , Xue Peng 
Published: June 2022

Abstract
When a quantum system is sent through a noisy channel, it is usually disturbed. At the same time, the system undergoes decoherence and tends to lose some delicate quantum features. For a particular basis, the coherence of the state changes. Otherwise, if the system is not disturbed, its state might retain all of coherence. As quantum noisy channels lead to both disturbance and decoherence, it is natural to ask about the relation between disturbance and decoherence. Recently, a trade-off relation for coherence and disturbance has been presented by Sharma and Pati (2018 Phys. Rev. A 97 062308). In this paper, with entangled photon pairs and linear optics, we experimentally verify this trade-off relation for a single-qubit system undergoing various noisy channels. Our experimental results agree with the theoretical predictions and provide a quantitative understanding of the relation between quantum channels and resources.
Reconstruction of observed mechanical motions with artificial intelligence tools
Authors: Jakovác Antal , Kurbucz Marcell T , Pósfay Péter 
Published: June 2022

Abstract
The goal of this paper is to determine the laws of observed trajectories assuming that there is a mechanical system in the background and using these laws to continue the observed motion in a plausible way. The laws are represented by neural networks with a limited number of parameters. The training of the networks follows the extreme learning machine idea. We determine laws for different levels of embedding, thus we can represent not only the equation of motion but also the symmetries of different kinds. In the recursive numerical evolution of the system, we require the fulfillment of all the observed laws, within the determined numerical precision. In this way, we can successfully reconstruct both integrable and chaotic motions, as we demonstrate in the example of the gravity pendulum and the double pendulum.
A modified lattice Boltzmann model for microcylindrical Couette gas flows
Authors: Ren Junjie , Wang Shengzhen , Liu Xiaoxue 
Published: June 2022

Abstract
We develop an axisymmetric lattice Boltzmann (LB) model to simulate microcylindrical Couette gas flows (MCGF) in the slip regime and transition regime, respectively. A kinetic boundary scheme in the cylindrical coordinate system is proposed to fulfill the second-order slip boundary condition at the cylindrical wall. To consider the effect of the Knudsen layers for transition flows, local effective Knudsen numbers are introduced into the kinetic boundary scheme and relaxation time. Numerical tests are executed to acquire the velocity distributions of the time-independent and time-dependent MCGF. Comparisons with the analytical solution and direct Monte Carlo data are also implemented. The simulation results demonstrate that the developed LB model can successfully acquire the velocity distribution of the MCGF with an intermediate Knudsen number in the transition regime.
A novel hyperchaotic map and its application in fast video encryption
Authors: Liu Sicong , Li Yongxin , Ge Xizhai , Li Chunbiao , Zhao Yibo 
Published: June 2022

Abstract
By the combined feedback of exponential, cubic and sinusoidal nonlinearity, a hyperchaotic map is constructed, which has the distinct features as providing two unipolar hyperchaotic sequences and large area of hyperchaotic orbit. A fast video encryption algorithm that adopted the permutation-diffusion-permutation strategy was developed consequently based on the hyperchaotic system. Each frame image obtained from the video stream is encrypted by the algorithm in real time. To accelerate the encryption, the frame image are encrypted in parallel. Experiment results and security analysis confirm the good security, robustness, and effectiveness of the encryption algorithm.
CLASS_GWB: robust modeling of the astrophysical gravitational wave background anisotropies
Authors: Bellomo Nicola , Bertacca Daniele , Jenkins Alexander C. , Matarrese Sabino , Raccanelli Alvise , Regimbau Tania , Ricciardone Angelo , Sakellariadou Mairi 
Published: June 2022

AbstractGravitational radiation offers a unique possibility to study the large-scale structure of the Universe, gravitational wave sources and propagation in a completely novel way. Given that gravitational wave maps contain a wealth of astrophysical and cosmological information, interpreting this signal requires a non-trivial multidisciplinary approach. In this work we present the complete computation of the signal produced by compact object mergers accounting for a detailed modelling of the astrophysical sources and for cosmological perturbations. We develop theCLASS_GWBcode, which allows for the computation of the anisotropies of the astrophysical gravitational wave background, accounting for source and detector properties, as well as effects of gravitational wave propagation. We apply our numerical tools to robustly compute the angular power spectrum of the anisotropies of the gravitational wave background generated by astrophysical sources in the LIGO-Virgo frequency band. The end-to-end theoretical framework we present can be easily applied to different sources and detectors in other frequency bands. Moreover, the same numerical tools can be used to compute the anisotropies of gravitational wave maps of the sky made using resolved events.
Two-component TeV Emissions for Blazars
Authors: Zhang Zhuang , Zeng Xiangtao , Pei Zhiyuan , Xiao Hubing , Ye Xuhong , Fan Junhui 
Published: June 2022

Abstract
For blazars, its radio emissions are composed of two components. In the high energy bands, Tera-electronvolts (TeV; 1012electronvolts) emissions were detected from some blazars. Does the TeV emission also consist of two components? To investigate the TeV emission component, we compiled a sample of 51 TeV blazars with available radio core dominance parameters and applied a two-component (the beamed and the unbeamed) model to study the composition of blazar TeV emission. We obtained the core-dominance parameter at the TeV band through applying a relativistic beaming model, and found that the average TeV core-dominance parameter is

log

R

TeV

BL

=
〈
3.12
±
2.83
〉

for 46 BL Lacs, and that is

log

R

TeV

FSRQ

=
〈
4.80
±
1.76
〉

for 5 FSRQs, which shows an indication that the core dominance parameter in BL Lacs is smaller than that in FSRQs. For the three subclasses of BL Lacs—high synchrotron peaked BL Lacs(HBLs), intermediate synchrotron peaked BL Lacs(IBLs) and low synchrotron peaked(LBLs),

log

R

TeV

HBL

is smaller than

log

R

TeV

IBL

and

log

R

TeV

LBL

. Our results suggest that the blazar TeV emission from the core is thousands times stronger than from the extended region and the TeV emission is more core-dominated for the lower synchrotron peaked sources. In addition, a significant correlation between the TeV core-dominance parameter (

log

R

TeV

) and the radio one (

log

R

radio

)

log

R

TeV

=
(
2.56
±
0.08
)
log

R

radio

+
0.99

, is obtained suggesting that the TeV emission is beamed and the TeV core-dominance parameter is an indicator of beaming effect at the TeV bands, and that the TeV emission has stronger beaming effect than the radio emission.
Optical measurement of a quantum dot state in a microdisk by a Stark transducer
Authors: Tsukanov A V , Kateev I Yu 
Published: June 2022

Abstract
A spectroscopic method for determining the number of electrons in a quantum dot (QD) located inside a microdisk resonator is proposed. A transducer with the form of a ring structure composed of single-electron QDs is an auxiliary element used to enhance the interaction of laser photons with the QD and with the microdisk. The microdisk parameters are calculated to ensure an efficient energy exchange between the disk modes and the transducer QDs. The influence of the Stark and Förster effects on the measurement accuracy is studied. The optimal measurement regime is shown to be achieved provided that both effects are compensated.
Productivity of sweet potato (Ipomoea batatas L.) in the conditions of the RF CRNZ
Authors: Shitikova A V , Povarnitsyna A V 
Published: June 2022

Abstract
The results of sweet potato yield in the climatic and soil conditions of the Non-Chernozem zone are presented, which allow to recommend the expansion of the areas of valuable crops to ensure the industrial production of flour, starch, ethanol, and raw materials for semi-finished products. Due to its origin from a warm subtropical climate, it requires appropriate temperature conditions and humidity, especially in May, when there is a high risk of spring frostsю Therefore, an assessment of growing technology under cover for the total and commercial yield of tubers of six sweet potato varieties was carried out. In the conditions of the Non-Chernozem zone of Russia, the sweet potato samples Sukhumskiy (yield 21.7 t/ha), Amsterdamskiy (24.8 t/ha), and Jewel variety (23.4 t/ha) showed high productivity on average over 2 years. Under experimental conditions, a change in the growth rate was noted depending on changes in agro-climatic conditions, while periods of growth stoppage under unfavorable conditions (drought) and periods of continued growth, which subsequently caused deformation of tubers (especially in the Pobeda 100 sample) were noted. The rate of increase in the mass of tubers showed a positive correlation with the amount of precipitation.
Phosphorus-potassium state as an element of natural fertility of gray forest soils of Western Siberia
Authors: Eremina D V , Kayugina S M 
Published: June 2022

Abstract
The purpose of the study was to assess the availability of phosphorus and potassium mobile forms in the humus layer of virgin gray forest soils in the western part of the West Siberian Lowland. The results of laboratory tests were processed using mathematical methods of variational statistics in Microsoft Excel. It was revealed that gray forest soils have low availability of mobile phosphorus in the humus layer (light gray - 34±17 mg/kg, gray - 44±23 mg/kg, dark gray - 52±24 mg/kg of soil). For that reason, when they are involved in arable land, continuous phosphorization or constant application of phosphorus fertilizers will be required. Also, during agricultural use, a high degree of variation in the content of mobile phosphorus should be considered (variation coefficient is 45% for dark gray and 51% for light gray and gray forest soils). Gray forest soils are characterized by a fairly good supply of mobile potassium, which content in humus layer of light gray soils is 133±45 mg/kg, gray - 140±49 mg/kg, dark gray - 164±51 mg/kg of soil. This is due to the peculiarities of the mineralogical composition of parent rock materials of gray forest soils. The variation of the content of potassium mobile forms in all subtypes is estimated as average. The research results can be applied in the development of agrochemical measures aimed at increasing the fertility of gray forest soils.
The impact of plant-associated rhizobacteria on germination capacity, growth and productivity of spring field mustard and emmer wheat
Authors: Lebedev V , Kondrat S , Uraev G , Khuaz S , Datkhuzheva R 
Published: June 2022

AbstractThe paper reports the results of field experiments that analysed changes in germination capacity, growth indicators and productivity of two crops in response to seed inoculation: field mustard (Brassica campestrisL.) of the Vostochnaya variety (k-274) and emmer wheat (Triticum dicoccumsubsp.asiaticumVavilov) of k-7516 variety. Morphometric parameters and productivity of dry mass were measured during the major stages of crop development. The seeds of field mustard were inoculated with the following bacterial products: Mizorin (Arthrobacter mysorens,strain 7), Mobilin (Pseudomonas fluorescens,strain PG-5) and Flavobakterin (Flavobacterium sp.,strain 30). The seeds of emmer wheat were inoculated with Psevdomonas (Pseudomonas fluorescens,strain PG-5) and Rizoagrin (Agrobacterium radiobacter, strain 204). In addition, we also tested biinoculation (combined use of two bacterial products) for each crop. The study aimed to analyse changes in growth indicators and productivity of field mustard and emmer wheat in response to mono- and biinoculation of seeds with plant-associated rhizobacteria. The experiments showed that the application of bacterial products and increasing doses of mineral nitrogen has a stimulating effect on plants. The study proved monoinoculation to be more effective than biinoculation. This may be due to the competing effect of rhizobacterial strains from different bacterial products once the biinoculated seeds are put in soil.
Grain disinfestation with ozone-air mixture
Authors: Baskakov I V , Orobinsky V I , Gievsky A M , Gulevsky V A , Chernyshov A V 
Published: June 2022

Abstract
Grain pests cause significant damage to agriculture. In the process of storage, in the absence of proper monitoring and control over the state of the grain heap, various harmful insects develop in it. In the conditions of the laboratory of Voronezh State Agrarian University named after Emperor Peter I, granary weevils (Sitophilus granaries L.) and flour weevils (Tribolium confusum L.) were found in winter wheat grain, which were subjected to subsequent ozonation. Since ozone concentrations in the ozone-air mixture are very high (70...2000 mg/m3), which is very dangerous for human health, the aim of the studies was to determine the effectiveness of ozone treatment under less stringent regimes. As a result, it was found that to completely destroy the granary weevils (Sitophilus granaries L.), an ozone concentration in the range of 2.86...5.06 mg/m3 with an exposure time of 280 min is sufficient. Since it is very difficult to maintain a constant gas content, it is necessary to focus on the dose of ozone above 1200 mg·min/m3. To completely destroy the flour weevils (Tribolium confusum L.), it should be ozonize at the specified parameters for at least 460 min. In this case, the dose of ozone should exceed 2000 mg·min/m3. Ozonize should be carried by the death of insects until 40...50%, the rest die within the next 24 hours.
Protection of soybeans against weeds with a two-component herbicide
Authors: Smurov C I , Grigorov O V , Ermolaev S N , Andreev P V 
Published: June 2022

Abstract
The article presents information on the effectiveness of a two-component herbicide on soybean crops. The effectiveness of its use at different rates of application and application both with and without adjuvants, as well as species sensitivity to weeds have been studied. The variants of chemical weeding, in which the maximum suppression of weeds was achieved, providing a high yield of soybean grain, were determined.
The use of white lupine in complete feed for trout
Authors: Gaponov N V , Loretts O G , Neverova O P , Sharaviev P V 
Published: June 2022

Abstract
The article presents the material on the most up-to-date, the global problem of protein deficiency in complete feedback for fish. One of the ways to solve this problem may be the use of white lupine (Lupinus Albus) in the structures of feed recipes. An important condition for the successful development of fish farming and the implementation of planned products for the production of products, to ensure food safety, occupy feeding issues. The decision of this issue puts a number of tasks to ensure feedback, rational methods of production, on the basis of advanced scientific achievements that contribute to the technological, economic development of the industry. Therefore, in experienced formulations of complete feed, the main task was to replace the white most expensive protein component into Lupine, that is, fish flour. In the first experienced recipe, the amount of lupine natives was 10%, which made it possible to reduce the fisherous flour content by 7%. The second experimental recipe in its structure contained lupine white without a shell in an amount of 22%, this made it possible to reduce the content of fish flour by 14%. The third experienced rechart contained Lupine without a shell of 25%, which made it possible to reduce the content of fish flour by 19%. Consequently, the use of white lupine in the formulations of complete feed, makes it possible to improve their nutritional value. And the use of lupine without a shell makes it possible to replace high-fingered animal feed in greater volume.