bluuebunny/crossref_metadata_2025_split huggingface dataset:
TdDS-UNet: top-down deeply supervised U-Net for the delineation of 3D colorectal cancer
Authors: Chen Shuchao , Xie Fei , Chen Shenghuan , Liu Shanshan , Li Haojiang , Gong Qiong , Ruan Guangying , Liu Lizhi , Chen Hongbo 
Published: February 2024

Abstract
Automatically delineating colorectal cancers with fuzzy boundaries from 3D images is a challenging task, but the problem of fuzzy boundary delineation in existing deep learning-based methods have not been investigated in depth. Here, an encoder–decoder-based U-shaped network (U-Net) based on top-down deep supervision (TdDS) was designed to accurately and automatically delineate the fuzzy boundaries of colorectal cancer. TdDS refines the semantic targets of the upper and lower stages by mapping ground truths that are more consistent with the stage properties than upsampling deep supervision. This stage-specific approach can guide the model to learn a coarse-to-fine delineation process and improve the delineation accuracy of fuzzy boundaries by gradually shrinking the boundaries. Experimental results showed that TdDS is more customizable and plays a role similar to the attentional mechanism, and it can further improve the capability of the model to delineate colorectal cancer contours. A total of 103, 12, and 29 3D pelvic magnetic resonance imaging volumes were used for training, validation, and testing, respectively. The comparative results indicate that the proposed method exhibits the best comprehensive performance, with a dice similarity coefficient (DSC) of 0.805 ± 0.053 and a hausdorff distance (HD) of 9.28 ± 5.14 voxels. In the delineation performance analysis section also showed that 44.49% of the delineation results are satisfactory and do not require revisions. This study can provide new technical support for the delineation of 3D colorectal cancer. Our method is open source, and the code is available at https://github.com/odindis/TdDS/tree/main.
Utilization of bioelectrical impedance vector analysis (BIVA) in children and adolescents without diagnosed diseases: a systematic review
Authors: Santiago Leandro Narciso , Martins Priscila Custódio , Silva Diego Augusto Santos 
Published: February 2024

Abstract

Introduction. Bioelectrical impedance vector analysis (BIVA) emerges as a technique that utilizes raw parameters of bioelectrical impedance analysis and assumes the use of a reference population for information analysis. Objective. To summarize the reference values, main studies objectives, approaches, pre-test recommendations and technical characteristics of the devices employed in studies utilizing BIVA among children and adolescents without diagnosed diseases. Methods. A systematic search was conducted in nine electronic databases (CINAHL, LILACS, PubMed, SciELO, Scopus, SPORTDiscus, Science Direct, MEDLINE, and Web of Science). Studies with different designs which allowed extracting information regarding reference values of BIVA in children and adolescents without diagnosed diseases, aged 19 years or younger, were included. The systematic review followed PRISMA procedures and was registered in PROSPERO (registration: CRD42023391069). Results. After applying the eligibility criteria, 36 studies were included. Twenty studies (55.6%) analyzed body composition using BIVA, thirteen studies (36.1%) aimed to establish reference values for BIVA, and three studies (8.3%) investigated the association of physical performance with BIVA. There was heterogeneity regarding the reference populations employed by the studies. Fifteen studies used their own sample as a reference (41.6%), four studies used the adult population as a reference (11.1%), and five studies used reference values from athletes (13.9%). Conclusion. Nutricional status and body composition were the main studies objectives. References values were not always adequate or specific for the sample and population. Furthermore, there was no pattern of pre-test recommendations among the studies.
Improved light extraction efficiency of AlGaN DUV light emitting diodes using Al/MgF2-based highly reflective film
Authors: Li Peishan , Huang Xiaoyue , Yang Yuqing , Xia Zhenghao , Wang Qiao , Chen Hang , Wang Xingfu 
Published: February 2024

Abstract
AlGaN DUV light emitting diodes (DUV-LEDs) (275 nm emission) are safe, eco-friendly and smart alternatives for inactivating viruses and bacteria. However, DUV-LEDs suffer from the main bottleneck of low external quantum efficiencies, which are strongly associated with the low light extraction efficiency caused by the strong optical polarisation of Al-rich AlGaN. Optical simulation results show that the luminous intensity of DUV-LEDs was increased by 10% owing to the synergistic effect of the sidewalls and substrates. The optical power of DUV-LEDs was increased to 16.8%, the far-field pattern was expanded to 130 degrees and the emission intensity was more focused on the central region, proving that the highly reflective sidewalls and substrates could re-direct the sideways-travelling photons for extraction. Moreover, we also investigated the reflective mechanism of Al/MgF2 layers. Optimizing the refractive index distribution of Al/MgF2 layers could change the electric field intensity and improve the reflectivity. At the same time, the temperature of the sample after coating was significantly reduced by 6.83%. Thermal radiation benefits and the high stability of bonding interfaces are the main reasons to reduce the temperature of DUV-LEDs after Al/MgF2 coating. The present strategy is proposed from the point of view of chip fabrication, which is cost-effective and able to be manufactured at a large scale.
Aeroelastic metastructure for simultaneously suppressing wind-induced vibration and energy harvesting under wind flows and base excitations
Authors: Chen Shun , Xu Che , Zhao Liya 
Published: February 2024

Abstract
This paper proposes an innovative dual-functional aeroelastic metastructure that effectively suppresses wind-induced structural vibrations under either pure aerodynamic galloping or concurrent galloping and base excitations, while simultaneously harnessing the vibratory energy to potentially allow for self-powered onboard low-power sensing applications. Two configurations are theoretically and experimentally analysed and compared, one consisting of simply regular locally resonating masses subjected to no external forces, while the other comprising locally resonating bluff bodies which experience additional aerodynamic galloping forces. Numerical investigation is conducted based on an established aero-electro-mechanically coupled model. Wind tunnel wind tunnel and base vibration experiments are carried out using a fabricated aeroelastic metastructure prototype to characterize the energy transfer mechanisms and validate the numerical results. The mutual effects of key system parameters, including the frequency ratio, mass ratio, load resistance and electromechanical coupling strength, on the dual-functional capabilities are examined, providing a comprehensive design guideline for efficiently enhancing the energy transfer and conversion. Experimentally, the galloping displacement of the primary structure is attenuated by 78% with a measured power output of 2.63 mW from a single auxiliary oscillator at a wind speed of 8 m s−1. This research opens new possibilities for designing novel metastructures in practical scenarios where both wind-induced vibration suppression and energy harvesting are crucial.
Hybrid synchronisation method based on inverse generalised and inverse projected high dimensional discrete chaotic systems
Authors: Xing Ya’nan , Zeng Jian , Dong Wenjie , Zhang Jing , Guo Pengteng , Ding Qun 
Published: February 2024

Abstract
High-dimensional discrete chaotic systems have a wide range of engineering applications, while the chaotic synchronization method is the key to confidential communication applications. Based on the proposed discriminant theorem for high-order polynomial chaotic mapping, in this paper, a hybrid inverse generalization and inverse projection synchronization method for high-dimensional discrete chaotic systems is constructed. The method increases the flexibility of synchronization control by designing to enable the coexistence of inverse projection synchronization and inverse generalized synchronization in chaotic systems, by specifically using an invertible and adjustable constant diagonal matrix to extend the control capability of the error system. Meanwhile, this paper proposed the validity of this hybrid synchronization scheme based on the multi-stationary chaotic system for the first time, through comparison, it is certified that the multi-stationary discrete chaotic synchronization system introduced in this paper not only has complex dynamics behavior but also has a faster synchronization speed. Meanwhile, this paper proposed the validity of this hybrid synchronization scheme based on the multi-stationary chaotic system for the first time, through comparison, it is certified that the multi-stationary discrete chaotic synchronization system introduced in this paper not only has complex dynamics behavior but also has a faster synchronization speed. Finally, in this paper, the hybrid synchronization-based encryption system is also constructed, in which the transmitter switches the chaotic system between different attractors by changing the initial conditions, and then uses different chaotic attractors to mask the plaintext information. The experimental results show that the system has higher security and larger key space.
The noncommutative Dirac oscillator with a permanent electric dipole moment in the presence of an electromagnetic field
Authors: de Sousa Oliveira Rubens Raimundo , Alencar Geová , Landim Ricardo Renan 
Published: February 2024

Abstract
In this work, we investigate the noncommutative Dirac oscillator (NCDO) with a permanent electric dipole moment (EDM) in the presence of an electromagnetic field. We consider a radial magnetic field generated by anti-Helmholtz coils and the uniform electric field of the Stark effect. Next, we determine the exact solutions of the system, given by the Dirac spinor and by the relativistic energy spectrum. We note that such a spinor is written in terms of the generalized Laguerre polynomials, and such a spectrum is a linear function on the potential energy U and depends on the quantum numbers n and m, spin parameter s, and of four angular frequencies: ω,

ω

¯

, ω

θ
, and ω

η
, where ω is the frequency of the DO,

ω

¯

is a type of ‘cyclotron frequency’, and ω

θ
and ω

η
are the NC frequencies of position and momentum. We graphically analyze the behavior of the spectrum as a function of these frequencies for three different values of n, with and without the influence of U. Besides, as an interesting result, another interpretation can be given for the origin of the nonminimal coupling of the DO, which would be through a neutral fermion with EDM in a radial magnetic field. Finally, we also analyze the nonrelativistic limit of our results, and comparing our problem with other works, we verified that our results generalize some particular cases in the literature.
Thermal transport and thermoelectric properties of transition metal dichalcogenides MoX
2 from first-principles calculation
Authors: Wisesa Radityo , Azhar Anugrah , Suprayoga Edi 
Published: February 2024

Abstract
The properties of two-dimensional (2D) materials have been extensively studied and applied in various applications. Our interest is to theoretically investigate the thermal transport and thermoelectric properties of the 2D transition metal dichalcogenides MoX
2 (X=S, Se, Te). We employ density functional theory and Boltzmann transport theory with relaxation-time approximation to calculate the electronic and transport properties. We also implemented the kinetic-collective model to improve the calculation of lattice thermal conductivity. Our calculations indicate that MoTe2 has the highest ZT of 2.77 among the other MoX
2 at 550 K due to its low thermal conductivity and high electrical conductivity. Consequently, we suggest that MoX
2 monolayers hold promise as materials for energy conversion devices due to their relatively high ZT. Moreover, these results could be beneficial to design 2D material-based high-performance thermoelectric devices.
Tunable energy bandgap of Fe-doped (Bi, Li) co-substituted barium titanate
Authors: Ali Othman , Alkathy Mahmoud S , Suresh E K , Ghosh Avijit , Raju K C James 
Published: February 2024

Abstract
In this work, a polycrystalline Ba0.96(½ Bi, ½ Li)0.04Ti(1-x) FexO3; (0 ≤ x ≤ 0.08) ceramics have been synthesised using a solid-state reaction method. The prepared systems were explored to detect the impact of Fe substitution on the energy bandgap of the ceramics. XRD patterns confirmed that there is a structural phase transition from tetragonal (P4 mm) to hexagonal (P63/mmc) phase as the concentration of Fe increases. Rietveld refinement was performed to obtain the lattice information. Furthermore, Raman spectroscopic analysis confirmed the structural information obtained from XRD study. The average bond length variations, strain evolutions, crystallite size, and theoretical density have been calculated from the structural analysis. It is found that the lower Fe concentration with the tetragonal phase showed a strong Jahn-Teller effect. Meanwhile, the higher concentration of Fe led to phase transition to hexagonal phase with fewer structural distortions. The optical band gap species were investigated through UV-Vis. Following the onset of defects induced by acceptor ions, an exciting band gap reduction up to 2.09 eV for the sample with x = 0.08 was attained. ESR and PL spectroscopies analyses showed that in the hexagonal phase region more defects are formed giving rise to promoting band gap narrowing. Furthermore, the ac conductivity analysis indicates the appearance of defect levels due to the formation of oxygen vacancies. This study demonstrates that the right choice of Fe content in the host material can tune the energy band gap significantly in the BLBTF system and may be exploited in photovoltaics in the visible region.
Bistability and chaotic behaviors in a 4D cancer oncolytic Virotherapy mathematical model: Pspice and FPGA implementations
Authors: P Deivasundari , Kabong Nono M , Megam Ngouonkadi E B , Fotsin H B , Karthikeyan Anitha 
Published: February 2024

Abstract
Oncolytic viruses (OVs) exploit characteristics of mass cells and tumor-related reaction of the body to the presence of antigen, to lyse malignant cells and modulate the tumor microenvironment. However, the effective clinical utilization of these powerful treatment modules necessitates their logical control, especially in order to prevent solid and metastatic outgrowths. Hence, it is imperative to develop methods to protect a virus from the annihilating surroundings from the bloodstream when traveling to tumor locations. Our article reports on bistability and chaotic behavior in a 4D cancer virotherapy model. We find that unstable, stable and chaotic behaviors can appear in the model when tuning some of its parameters. With the help of the chart of dynamic behaviors in parameter spaces, numerical investigations of the system’s characteristics are analyzed followed by a discussion of the obtained results. It appears that the local transition change from an invariant one-torus (IT1) to its two-torus (IT2) counterpart can be found in the system and this undergoes a Neimark-Saker (NS) change of direction. As the increasing rate of immune effector enhance, the immune cells amount increases and as a consequence, the virotherapy dynamics becomes chaotic with a pronounced Lyapunov exponent. This can result to the failure of the virotherapy due to the interference of the immune cells with viruses. We also focus our study on the deign of ad-hoc electronic and Field Programmable Gate Arrays (FPGA) implementations of the cancer virotherapy’s model, to illustrate the obtained results.
Re-expansion modeling to understand the electrostatic interaction between charged core–shell structured particles
Authors: Feng Yue , Zhou Zilong , Wang Ruiguo , Shen Xing-Feng , Yang Zhaoxu , Xiong Ying 
Published: February 2024

Abstract
Accurately calculating the electrostatic force is an important step in understanding the interaction between charged core–shell structured particles that have been widely observed in chemistry, physics, biology, and engineering. In this paper, the authors develop a general analytical model to solve for the electrostatic interaction between charged core–shell structured particles that involves a dielectric or conducting core coated with a polarizable dielectric shell. The re-expansion was used method to re-expand the spatial potential in a Legendre polynomial series under interfacial conditions. The electrostatic force was represented as a series based on Maxwell’s stress tensor, and was governed by such characteristic parameters as the thickness of the shell, its dielectric constant, and the surface-to-surface separation even at the point of contact. Both unlike-charge and like-charge interactions were considered, and revealed that the polarization of the dielectric shell enhanced attraction but diminished repulsion. Counterintuitively, the electrostatic force was found to rely on the total number of free charges rather than the charge density. A limiting case was provided in which the proposed coated particle–particle model could describe the electrostatic force between a coated particle and a coated plane if the radius of either particle was sufficiently large. The force obtained by the theoretical solution was in exact agreement with that obtained by finite element analysis. The appropriate number of terms required for convergence was also investigated. The model developed here lays the foundation for a general theory of electrostatic interactions between charged particles with multi-shell layers.
Examining reachability of fractional dynamical systems with delays in control utilizing ψ-Hilfer pseudo-fractional derivative
Authors: Panneer Selvam Anjapuli , Govindaraj Venkatesan 
Published: February 2024

Abstract
This research focuses on the reachability criteria of fractional dynamical systems with delays in control of order ϑ ∈ (0, 1) and type ϱ ∈ [0, 1] in the context of control theory. The study introduces the utilization of the ψ-Hilfer pseudo fractional derivative to describe the dynamics of systems with delays in control. We obtained the necessary and sufficient conditions for the reachability criteria of fractional order linear dynamical systems by employing the positive definiteness of Gramian matrices. We arrived the sufficient conditions for the reachability criteria of fractional order nonlinear dynamical systems using Banach’s fixed point theorem. A few numerical examples are made available for a better understanding of the theoretical conclusions.
Designing high-performance polyaniline @MoS2@AC hybrid electrode for electrochemical–based Next-generation battery-supercapacitor hybrid energy storage device and hydrogen evolution reaction
Authors: Alsaiari Mabkhoot , Imran Muhammad , Afzal Amir Muhammad , Mumtaz Sohail , Algethami Jari S , Harraz Farid A 
Published: February 2024

Abstract
Polyaniline (PANI), a conducting polymer, has attracted the attention of researchers as a potential candidate due to its higher capacitance and outstanding electrochemical reversibility. In this research, we used the hydrothermal approach to synthesize MoS2@PANI hybrid electrode material that may overcome the low cyclic stability of PANI. The composite material MoS2/PANI (with M/P-25/75 wt%) demonstrated a specific capacity (Qs) with the amount 1087.5 C g−1 or 1812.5 F/g, much more advanced than reference samples due to the hybrid structural integrity and enhancement of the specific surface area of MoS2 and PANI interaction through electrostatic repulsion and hydrogen bonding. The asymmetric device (MoS2/PANI-25/75wt%//AC) demonstrated an extraordinary value of a Qs of 361 C g−1 over pure PANI. This novel supercapattery device showed a supreme high energy density of 65.33 Wh kg−1 and a power density of 1668.83 W/kg. Further, the hybrid electrode is used for the hydrogen evolution reactions and obtained the value of over potential is 43 mV. A small value of the Tafel slope of 39 mV/dec is observed with high stability. The improved energy storage capabilities of MoS2/PANI hybrid electrodes with multiple applications provide a new paragon to design unusual and fast multi-functional devices.
Dark Matter Direct Detection in 𝗍-channel mediator models
Authors: Arcadi Giorgio , Cabo-Almeida David , Mescia Federico , Virto Javier 
Published: February 2024

Abstract
We perform a comprehensive study of the Direct Detection phenomenology of singlet Dark Matter t-channel portal models.
For that purpose, we present a complete one-loop matching onto a Heavy Dark-Matter Effective Field Theory, leading to a complete computation of the loop induced Direct Detection cross-section
for both scalar and fermionic Dark Matter candidates.
The results are compared with current and future bounds from Direct Detection experiments, as well as with the requirement of the correct Dark Matter relic density.
Stability analysis of a time-delayed Van der Pol–Helmholtz–Duffing oscillator in fractal space with a non-perturbative approach
Authors: El-Dib Yusry O 
Published: February 2024

Abstract
The time-delayed fractal Van der Pol–Helmholtz–Duffing (VPHD) oscillator is the subject of this paper, which explores its mechanisms and highlights its stability analysis. While time-delayed technologies are currently garnering significant attention, the focus of this research remains crucially relevant. A non-perturbative approach is employed to refine and set the stage for the system under scrutiny. The innovative methodologies introduced yield an equivalent linear differential equation, mirroring the inherent nonlinearities of the system. Notably, the incorporation of quadratic nonlinearity into the frequency formula represents a cutting-edge advancement. The analytical solution’s validity is corroborated using a numerical approach. Stability conditions are ascertained through the residual Galerkin method. Intriguingly, it is observed that the delay parameter, in the context of the fractal system, reverses its stabilizing influence, impacting both the amplitude of delayed velocity and the position. The analytical solution’s precision is underscored by its close alignment with numerical results. Furthermore, the study reveals that fractal characteristics emulate damping behaviors. Given its applicability across diverse nonlinear dynamical systems, this non-perturbative approach emerges as a promising avenue for future research.