bluuebunny/crossref_metadata_2025_split huggingface dataset:
A novel 5D memristor conservative chaotic system with multiple forms of hidden flows
Authors: Xu Chengbin , Luo Yuyao , Li Xinyu , Fan Chunlei 
Published: December 2023

Abstract
Memristor is one of the basic circuit elements commonly used in circuit model analysis. More complex dynamic characteristics can be observed by coupling memristor into nonlinear circuit. However, there is relatively little attention paid to high-dimensional conservative chaos based on memristors up to now. In this paper, a five-dimensional memristor conservative chaotic system is built after the introduction of the memristor into conservative chaotic system. There is no equilibrium point in this system and the phase trajectory produced by it has hidden properties. Its conservatism is analyzed by bifurcation diagram, Lyapunov exponent spectrum and divergence. The phase trajectory will change with the change of parameters, which Poincaré mapping also verified these dynamic behaviors. In addition, hidden extreme multistability and initial value offset boosting behavior are also found in this system. It is to be noted that this behavior is less in memristor conservative chaotic system without equilibrium points. At the same time, a new transient transition behavior is observed. By introducing spectral entropy algorithm, the complexity of sequences is analyzed and compared with the existing literature. The results show that the system has higher complexity. Finally, the systematic analogous circuit is designed and built whose results are consistent with the MATLAB numerical simulation results, which has laid a solid foundation for the practical application of the system in engineering.
Secure nano-communication framework using RSCV cryptographic circuit in IBM Q
Authors: Kundu Arpita , Das Jadav Chandra , Debnath Bikash , De Debashis , Sarkar Angsuman 
Published: December 2023

Abstract
In the cryptographic domain, quantum and its real-time hardware simulation make it easier to secure data during communication. Here, using quantum logic, a unique encryption technique called Reversible select, cross, and variation (RSCV) encryption and decryption, which involves swapping input data halves, is shown. In this article using IBM Q, we created a cryptographic encoder and decoder circuit design utilizing various quantum gates. Based on the encoder/decoder circuit, a simple nanocommunication framework is proposed. Further, to explore the application of the noise model, how to utilize this model to create noisy replicas of these quantum circuits to research the impacts of noise that occur for actual device output is shown. To reduce measurement mistakes, measurement calibration is performed using qiskit ignis model. Preparing all 2n basis input states and calculating the likelihood of counting in the other basis states are the key concepts. The percentage improvement we achieved is 40%, 30%, and 30%, respectively, compared to earlier ones, in RSCV encryption, decryption, and RSCV cryptographic communication architecture for fake provider noise error model. It is feasible to adjust the average outcomes of an additional interesting experiment using these calibrations.
Full analysis of the scalar-induced gravitational waves for the curvature perturbation with local-type non-Gaussianities
Authors: Yuan Chen , Meng De-Shuang , Huang Qing-Guo 
Published: December 2023

Abstract
Primordial black holes (PBHs) are supposed to form through the gravitational collapse of regions with large density fluctuations. The formation of PBHs inevitably leads to the emission of scalar-induced gravitational wave (SIGW) signals, offering a unique opportunity to test the hypothesis of PBHs as a constituent of dark matter (DM). Previous studies have calculated the energy spectrum of SIGWs in local-type non-Gaussian models, primarily considering the contributions from the F
NL-order or the G
NL-order while neglecting connected diagrams. In this study, we extend the previous work by (i) considering the full contribution of non-Gaussian diagrams up to the G
NL-order; (ii) deriving the generic scaling of the SIGW energy spectrum in the infrared region. We derive semi-analytical results applicable to arbitrary primordial power spectra and numerically evaluate the energy spectrum of SIGWs for a log-normal power spectrum.
Maximizing the ion temperature in an electron heated plasma: from WEST towards larger devices
Authors: Manas P. , Artaud J.F. , Bourdelle C. , Ostuni V. , Morales J. , Citrin J. ,   the WEST Team
Published: December 2023

Abstract
In electron heated plasmas, as the power increases, it is experimentally reported that the ion temperature (Ti
) saturates while the electron temperature (Te
) increases [Beurskens NF 2022]. As on AUG, W7X and elsewhere, Ti
saturates around 1.5 keV in WEST L-mode electron heated plasmas while Te
reaches 4 keV. Simulations within the integrated model METIS have been compared against a whole WEST campaign consisting mostly of L-mode plasmas with Lower Hybrid heating ranging from 1 to 5.5 MW. In METIS, the collisional equipartition is modeled as well as the turbulent heat transport using the neural network regression of the quasilinear gyrokinetic code QuaLiKiz. The observed Ti
saturation is well captured by the modeling framework. The saturation correlates with a low ratio of the energy confinement time to the volume averaged electron-ion collisional heat exchange time. It is then shown that Ti
saturation in electron heated plasma is due to an equipartition time higher than the energy confinement time. In larger devices, no Ti
saturation is expected nor predicted by physics based integrated modeling used in this work, thanks to equipartition times sufficiently shorter than the energy confinement time.
Feasibility study of a coded aperture imaging technique for position-sensitive muonic X-ray atomic ratio reconstruction
Authors: Lin Z.B. , Pan Z.W. , Wang Z. , He Z.Y. , Yang T.Y. , Chen Z. , Yuan Y. , Kang Z.C. , Xie F. , Li Q. , Liu J.D. , Ye B.J. 
Published: December 2023

Abstract
A position-sensitive multi-compound inspection methodology
using Muonic X-ray Emission Spectroscopic (μ-XES) element
analysis is proposed due to the ability of the coded aperture
imaging technique to maintain the relative intensity of X-rays. This
methodology can simultaneously obtain the atomic ratio of different
regions of the sample under study. Therefore, the mis-judgements of
material compositions caused by averaging results can be
reduced. The atomic ratio reconstruction quality is mainly related
to X-ray counts (Nx
), atomic ratios of materials (AT
), size
and placement of sample blocks. In this work, several different
sample blocks made of light elements were designed by GEANT4 Monte
Carlo (MC) simulations to study the influences of Nx
, AT
, size
and placement of sample on atomic ratio reconstruction quality. In
the inspection of multiple sample blocks, this methodology
successfully distinguished the material compositions from different
regions by reconstructing the atomic ratios of C/N and
O/N. Moreover, this methodology can clearly image element blocks
larger than 2 × 2 mm2.
What goes in must come out: the oceanic outgassing of anthropogenic carbon
Authors: Couespel Damien , Tjiputra Jerry 
Published: December 2023

Abstract
About 25% of the emitted anthropogenic CO2 is absorbed by the ocean and transported to the interior through key gateways, such as the Southern Ocean or the North Atlantic. Over the next few centuries, anthropogenic CO2 is then redistributed by ocean circulation and stored mostly in the upper layers of the subtropical gyres. Because of the combined effects of (i) weakening buffering capacity, (ii) warming-induced lower solubility, (iii) changes in wind stress and (iv) changes in ocean circulation, there is a high confidence that the ocean sink will weaken in the future. Here, we use IPCC-class Earth System Model (ESM) simulations following the SSP1-2.6 and SSP5-8.5 climate change scenarios extended to the year 2300 to reveal that anthropogenic CO2 begins to outgas in the subtropical gyres of both hemispheres during the summer months of the 21st century. In 2100, about 53% of the surface ocean experience outgassing at least one month in a year in SSP1-2.6, against 37% in SSP5-8.5. After 2100, this fraction keeps increasing, reaching 63% by 2300 in SSP5-8.5 while stabilizing at 55% in SSP1-2.6. This outgassing pattern is driven by the rapid increase in oceanic pCO2, faster than the atmospheric pCO2, due to the combined effect of both rapid warming and long-term accumulation of anthropogenic carbon in these regions. These findings call for increased observation efforts in these areas, particularly in the subtropical gyres of the Southern Hemisphere, in order to detect future release of anthropogenic carbon and accurately constrain the future carbon budget.
Cooking emissions are a major source of racial-ethnic air pollution exposure disparities in the United States
Authors: Saha Provat K , Presto Albert A , Hankey Steve , Marshall Julian D , Robinson Allen L 
Published: December 2023

Abstract
Racial-ethnic minority populations in the US are disproportionately exposed to airborne fine particulate matter (PM2.5), but few national studies have focused individually on the sources that contribute to these disparities. We address this gap by conducting a comprehensive analysis of PM2.5 exposure disparities by race-ethnicity in the US, focusing on three source-categories: mobile-sources, cooking, and all other sources combined. Our approach is based on high-resolution, national land-use regression estimates of source-resolved PM2.5 components, derived from high-resolution aerosol mass spectrometer measurements. We find that each of these sources contributes approximately one-third of the overall PM2.5 exposure disparities by race-ethnicity. While the importance of mobile-source tailpipe emissions is well recognized, our study underscores the significance of cooking emissions in creating PM2.5 exposure disparities. This finding represents a potentially significant opportunity to reduce these disparities, as cooking emissions are currently largely unregulated. It has important implications for policymakers and public health advocates aiming to address the persistent issue of racial-ethnic disparities in air pollution.
A dynamic-leaf light use efficiency model for improving gross primary production estimation
Authors: Huang Lingxiao , Yuan Wenping , Zheng Yi , Zhou Yanlian , He Mingzhu , Jin Jiaxin , Huang Xiaojuan , Chen Siyuan , Liu Meng , Guan Xiaobin , Jiang Shouzheng , Lin Xiaofeng , Li Zhao-Liang , Tang Ronglin 
Published: December 2023

Abstract
Accurate quantification of terrestrial gross primary production (GPP) is integral for enhancing our understanding of the global carbon budget and climate change. The light use efficiency (LUE) model is undoubtedly the most extensively applied method for GPP estimation. However, the two-leaf (TL)-LUE model using a ‘potential’ sunlit leaf area index (LAIsu) can separate a portion of LAIsu even when the canopy does not receive any direct radiation, leading to the underestimation of GPP under cloudy and overcast days. Here, we developed a dynamic-leaf (DL) LUE model by introducing an ‘effective’ LAIsu to improve GPP estimation, which considers the comprehensive contribution of LAIsu when the canopy does and does not receive direct radiation. In particular, the new model decreases LAIsu to zero when direct radiation reaches zero. Our evaluation at eight ChinaFLUX sites showed that (1) the DL-LUE model outperformed the most well-known BL-LUE (namely, the MOD17 GPP algorithm) and TL-LUE models in reproducing the daily in situ GPP, especially at four forest sites [reducing the root mean square error (RMSE) from 1.74 g C m−2 d−1 and 1.53 g C m−2 d−1 to 1.36 g C m−2 d−1 and increasing the coefficient of determination (R
2) from 0.74 and 0.79–0.82, respectively]. Moreover, the improvements were particularly pronounced at longer temporal scales, as indicated by the RMSE decreasing from 29.32 g C m−2 month−1 and28.11 g C m−2 month−1 to 25.81 g C m−2 month−1 at a monthly scale and from 231.82 g C m−2 yr−1 and 221.60 g C m−2 yr−1–200.00 g C m−2 yr−1 at a yearly scale; (2) the DL-LUE model mitigated the systematic underestimation of the in situ GPP by both the TL-LUE and BL-LUE models when the clearness index (CI) was below 0.5, as indicated by the Bias reductions of 0.25 g C m−2 d−1 and 0.46 g C m−2 d−1, respectively; and (3) the contributions of the shaded GPP to the total GPP from the DL-LUE model were higher by 0.07–0.16 than those from the TL-LUE model across the eight ChinaFLUX sites. The proposed parsimonious and effective DL-LUE model not only has great potential for improving global GPP estimations but also provides a more mechanism-based approach for partitioning the total GPP into its shaded and sunlit components.
Effective orientifolds from broken supersymmetry
Authors: Mourad J , Sagnotti A 
Published: December 2023

Abstract
We recently proposed a class of type IIB vacua that yield, at low energies, four–dimensional Minkowski spaces with broken supersymmetry and a constant string coupling. They are compactifications with an internal five-torus bearing a five–form flux Φ and warp factors depending on a single coordinate. The breaking of supersymmetry occurs when the internal space includes a finite interval. A probe-brane analysis revealed a gravitational repulsion and a charge attraction of equal magnitude from the left end of the interval, together with a singularity at the other end. Here we complete the analysis revealing the presence, at one end, of an effective

O
3

of negative tension and positive five–form charge. We also determine the values of these quantities, showing that

T
=
−
Q
=
Φ

, and characterize the singularity present at the other end of the interval, which hosts an opposite charge. Finally, we discuss various forms of the gravity action in the presence of a boundary and identify a self–adjoint form for its fluctuations.

Invited contribution to the special issue of Journal of Physics A: Mathematical and Theoretical on ‘Fields, Gravity, Strings and Beyond: In Memory of Stanley Deser’
Non-standard quantum algebras and finite dimensional
PT
-symmetric systems
Authors: Ballesteros Ángel , Ramírez Romina , Reboiro Marta 
Published: December 2023

Abstract
In this work,

P
T

-symmetric Hamiltonians defined on quantum

s
l
(
2
,

R

)

algebras are presented. We study the spectrum of a family of non-Hermitian Hamiltonians written in terms of the generators of the non-standard

U

z

(
s
l
(
2
,

R

)
)

Hopf algebra deformation of

s
l
(
2
,

R

)

. By making use of a particular boson representation of the generators of

U

z

(
s
l
(
2
,

R

)
)

, both the co-product and the commutation relations of the quantum algebra are shown to be invariant under the

P
T

-transformation. In terms of these operators, we construct several finite dimensional

P
T

-symmetry Hamiltonians, whose spectrum is analytically obtained for any arbitrary dimension. In particular, we show the appearance of Exceptional Points in the space of model parameters and we discuss the behaviour of the spectrum both in the exact

P
T

-symmetry and the broken

P
T

-symmetry dynamical phases. As an application, we show that this non-standard quantum algebra can be used to define an effective model Hamiltonian describing accurately the experimental spectra of three-electron hybrid qubits based on asymmetric double quantum dots. Remarkably enough, in this effective model, the deformation parameter z has to be identified with the detuning parameter of the system.
Effective influence of AgroMag magnesium fertilizers on the yield and quality of potatoes
Authors: Seregina Inga , Akanova Natalya , Kutyreva Darya , Kozlova Alevtina 
Published: December 2023

Abstract
The paper describes the results obtained on the effectiveness of a new type of magnesium fertilizer Agromag on potato productivity and the quality of its tubers in crop rotation with potatoes during a two-year field experiment. It was revealed that on average over two years, in variants using magnesium fertilizers in increasing doses, potato yields increase by 20%. It is noted that the use of magnesium fertilizers together with the mineral background increased the quality of potato tubers and improved culinary qualities.
Study of combined drying of lemon seeds and peel
Authors: Choriev A Zh , Khodzhiev A A , Rakhimov U Yu , Eshmatov F X , Tuktaev Sh Q , Eshmuratov M T 
Published: December 2023

Abstract
The aim of the paper is to study the process of combined drying of lemon waste and to substantiate the prospects for the implementation of the process of drying lemon waste using IR-convective heat supply to intensify moisture transfer due to preliminary IR treatment with powerful pulsed radiation. As a result of theoretical and experimental studies, the modes of IR-convective drying have been determined by studies. The influence of the heat flux emitted by IR lamps on the object of study has been studied, depending on the variation of the increase in heat flux in the size of the distribution of emitters, respectively, lemon peel and seeds, processing time. Analyses have shown that in the proposed method, when exposed to IR rays, intensive removal of moisture from the entire volume of the material occurs.
Drum dispenser of feed additives
Authors: Eshdavlatov E E , Mamatov F M , Eshdalatov A E , Suyunov A A , Yusupov F F 
Published: December 2023

Abstract
The purpose the study is to determine the performance justification design parameters and operating mode of a continuous drum dispenser. To dispense bulk powdery and fine-grained feed additives in small quantities into the feed mixture, a continuous drum dispenser is proposed, which consists of a hopper, an inlet and outlet neck, a rotor housing and sectors. The inlet neck of the dispenser is located on the left side the dispenser shaft, and the outlet neck is on the right side. Theoretical studies were carried out using the basic provisions of technical mechanics. The experiments were carried out on a specially manufactured installation. As a result of the research, the following design parameters and operating mode of a continuous drum dispenser were established, providing productivity within Q=10-137kg/h: the number of sectors in the rotor is 6, the number of rotations of the rotor is 40 r/min, the radius of the circumference outer arc of the sector is 39 mm, the radius of circle forming the inner arc sector is 29 mm.
Investigation of joints from corrosion-resistant steels obtained by energy-saving rotary friction welding technology
Authors: Tokarev A S , Karetnikov D V 
Published: December 2023

Abstract
In this article the possibility of application of rotary friction welding for joining parts from stainless steels is evaluated on the example of 10Cr17Ni13Mo2Ti steel. Application of rotary friction welding allows to refuse post-weld heat treatment, which is labor-intensive, energy-consuming and environmentally harmful operation. For this purpose, cylindrical samples of 20 mm in diameter were made from the above steel using friction welding without subsequent heat treatment. The microstructure, microhardness measurement, tensile and impact bending tests were carried out. The microstructure study showed that the weld width across the entire cross-section does not exceed 12 μm. It has an irregular wavy shape with a fine-grained structure. Tensile tests showed that the average value of yield strength of samples with welded joint is 1.6% higher than the same value of samples from the base metal, but the average value of time resistance is lower by 5.6%. Impact bending test results showed that the average impact toughness of welded samples is almost the same as that of base metal samples. According to the results of studies concluded that the weldability of steel 10Cr17Ni13Mo2Ti using friction welding is good, welded joints are obtained high quality.
Evaluation of the effect of welding technology on the operational characteristics of joints
Authors: Tokarev A S , Karetnikov D V 
Published: December 2023

Abstract
The purpose of the study presented in the article is a comparative analysis of operational characteristics, namely strength and tightness, of welded samples of corrosion-resistant steel on the example of 10Cr17Ni13Mo2Ti steel. These samples were obtained by different technologies: the more environmentally friendly technology of rotary friction welding without heat treatment and the currently used technology of arc welding and post-weld heat treatment. Special tooling was developed for the tightness tests and the tests were carried out on a hydraulic test bench. For the strength tests, the tooling was also developed and the tests were performed on a tensile testing machine. Tightness testing of the samples showed that both types of samples could withstand a test pressure of 12 MPa, including 0 to 2 mm tube wall thinning (0 to 80% of the original thickness), and 35 MPa, including 0 to 1 mm tube wall thinning (0 to 40% of the original thickness). The strength tests showed that the samples obtained by friction welding, under the conditions of tests on pulling the tube from the equivalent sleeve, withstand the maximum load to failure, exceeding by 14.9% the corresponding index of the samples obtained by arc welding.
Influence of seed positioning during sowing on the amount of deviation of plant sprouts from the straightness of rows
Authors: Akhmetov A A , Akhmedov Sh A , Kambarova D U , Ostanov Sh S 
Published: December 2023

Abstract
To care for crops without damaging plant sprouts, a safe distance must be maintained from the wheels of the tractor and the working parts of the agricultural machine to the root system of the plant rows, which is determined by the size of the protective zone. Despite this, in some cases, during inter-row cultivation or care of crops, damage occurs to individual plant sprouts that are significantly deviated from the axis of symmetry of the row. This is due to the type of location of the seeds during sowing relative to the axis of symmetry of the seed row, the profile of the field and the content of the soil fraction of the surface layer of soil located above the sown seeds, gaps in the steering drive connections and the qualifications of the driver. Among them, the first two factors are probabilistic in nature and significantly affect the deviation of seedlings from the straightness of the rows and the setting of the size of the protective zone. Theoretical and experimental studies have shown that the deviation of sprouts under the influence of these factors from the straightness of the rows of plants is on average ±2.58 cm, which should be taken into account when determining the size of the protective zone.
Increasing energy efficiency as a result of the influence on the operation of a Sano automobile engine with the adding of hydrogen as an additive to primary fuel
Authors: Musabekov Zakirjon , Tillahodjaev Rustam , Mirzayev Abdulla , Yangibayev Avaz , Uralova Hilola 
Published: December 2023

Abstract
This article discusses a method for reducing emissions of toxic and harmful substances into the environment through the use of a composite fuel mixture in vehicles with an internal combustion engine. When using composite fuel, that is, using hydrogen as an energy carrier, during operation, by increasing the energy efficiency of the car engine and improving its environmental performance, the following indicators are achieved: high speed and completeness of combustion of the fuel mixture; the ability to bring the mixture in real internal combustion engine operation closer to ideal by providing heat in a constant volume; and an analysis of the dependence of engine efficiency on the addition of hydrogen to the main fuel is presented.