bluuebunny/crossref_metadata_2025_split huggingface dataset:
Comparative analysis of the acoustical impedance of a set of traditional trombones versus P-Bone
Authors: Esteve-Rico J C , Vera-Guarinos J , Gallego S , Francés J 
Published: June 2023

AbstractIn this work, the impedance response of a set of trombones is analysed in order to find correlations between their sound and timbre and the main characteristics of the impedance curves. For this specific application, an impedance tube has been designed and manufactured to measure the different trombones’ impedance curves. A plastic trombone (P-Bone) has been considered in the experiments to determine the importance of the material used to fabricate the instrument. In order to parametrise the trombones considered here, the instrument profile has been theoretically studied using a conical approach. More precisely, the tube and bell cone of the trombone has been discretised along its length in a set of small conical segments. Also, the influence of the mouthpiece is considered in the analytical formalism, and all these factors are optimised by employing a genetic algorithm to find the physical parameters that fit the experimental impedance curves. The experimental results are also compared with the opinions obtained from a survey about the subjective assessment of the same music passage recorded with the different instruments considered here. The results show that the impedance curve and some of the fitted parameters obtained correlate with the assessment of trombones in the blind survey. Moreover, the quality of the impedance tube here designed reveals that it is an excellent option to find leakages or dysfunction in this instrument.
A low-cost fabrication method for high aspect ratio nano-channels by near-field UV exposure and thermal nanoimprinting
Authors: Zhang Wenlei , Yin Zhifu , Sun Lei 
Published: June 2023

Abstract
A low-cost fabrication method for high aspect ratio nano-channels is proposed in this paper. The near-field exposure principle based on Fresnel diffraction was analyzed and the silicon nano-mold with the height of 962 ± 9 nm and width of 332 ± 12 nm was produced. Furthermore, the applicable demolding conditions for high aspect ratio nanoimprinting were studied, and the SU-8 nano-channels with the height of 947 ± 17 nm and width of 336 ± 13 nm were fabricated.
Kagome surface states and weak electronic correlation in vanadium-kagome metals
Authors: Ding Jianyang , Zhao Ningning , Tao Zicheng , Huang Zhe , Jiang Zhicheng , Yang Yichen , Cho Soohyun , Liu Zhengtai , Liu Jishan , Guo Yanfeng , Liu Kai , Liu Zhonghao , Shen Dawei 
Published: June 2023

Abstract

RV

6

Sn

6

(R = Y and lanthanides) with two-dimensional vanadium-kagome surface states is an ideal platform to investigate kagome physics and manipulate the kagome features to realize novel phenomena. Utilizing the micron-scale spatially resolved angle-resolved photoemission spectroscopy and first-principles calculations, we report a systematical study of the electronic structures of RV

6

Sn

6

(R = Gd, Tb, and Lu) on the two cleaved surfaces, i.e. the V- and RSn1-terminated (001) surfaces. The calculated bands without any renormalization match well with the main ARPES dispersive features, indicating the weak electronic correlation in this system. We observe ‘W’-like kagome surface states around the Brillouin zone corners showing R-element-dependent intensities, which is probably due to various coupling strengths between V and RSn1 layers. Our finding suggests an avenue for tuning electronic states by interlayer coupling based on two-dimensional kagome lattices.
Disorder effect on intersubband optical absorption of n-type δ-doped quantum well in GaAs
Authors: Noverola-Gamas H , Macias Rojas L G , Azalim S , Oubram O 
Published: June 2023

Abstract
The inevitable structural disorder associated with the fluctuation of the applied external electric field, laser intensity, and bidimensional density in the low dimensional quantum system can affect noticeably optical absorption properties and the related phenomena. In this work, we study the effect of structural disorder on the optical absorption properties in delta-doped quantum wells (DDQWs). Starting from effective mass approximation and the Thomas-Fermi approach as well as using the matrix density, the electronic structure and the optical absorption coefficients of DDQWs are determined. It is found that the optical absorption properties depend on the strength and the type of structural disorder. Particularly, the bidimensional density disorder suppresses strongly the optical properties. Whilst, the disordered external applied electric field fluctuates moderately in the properties. In contrast, the disordered laser holds absorption properties unalterable. So, our results specify that to have and preserve good optical absorption properties in DDQWs, requires precise control of the bidimensional. Besides, the finding may improve the understanding of the impact of the disorder on the optoelectronic properties based on DDQWs.
Insights into the effect of growth on the Ziff–Gulari–Barshad model and the film properties
Authors: Cheimarios N 
Published: June 2023

Abstract
We perform kinetic Monte Carlo computations with a modified Ziff–Gulari–Barshad (ZGB) model which considers the growth of a film. We show that the growth of the film significantly affects the conclusions that can be drawn from the ZGB model, even if the main mechanism, the surface reaction, remains the same. We compare the results of the growth model to the original ZGB and the phase transitions disappears; they are replaced by a smooth transition from 0 to full coverage. The latter observations qualitatively agree with experimental measurements for the CO2 formation. However, in the growth model the surface is always poisoned to a particular coverage values due to the local height differences of the lattice sites. Finally, a potential mechanism based only on surface phenomena which can lead to the decrement of the growth rate even if the amount of the precursor increases is explored.
On zeros and spectral property of self-affine measures
Authors: Wang Zhi-Yong , Liu Jing-Cheng , Dong Xin-Han 
Published: June 2023

Abstract
In this paper, we study the spectral property of self-affine measures

μ

M
,
D

generated by an expanding integer matrix

M
∈

M
n

(

Z

)

and a finite digit set

D
⊂

Z

n

, i.e. investigate whether the function in

L
2

(

μ

M
,
D

)

has a Fourier expansion. Let

Z
D
n

=
{
x
∈
[
0
,
1

)
n

:

∑

d

∈
D

e

2
π
i
⟨

d

,
x
⟩

=
0
}

and

E
q
n

=
(

q

−
1

Z

n

∩
[
0
,
1

)
n

)
∖
{
0
}

for some integer

q
⩾
2

. Through the discussion of the relationships between

Z
D
n

and

E
q
n

, we establish some criteria to determine whether

μ

M
,
D

is spectral or non-spectral. Indeed, under those suitable assumptions, if

μ

M
,
D

is a spectral measure, we find its spectrum; otherwise, we give the maximum number of orthogonal exponential functions in

L
2

(

μ

M
,
D

)

. As an application, our results can contain some well-known conclusions.
The influence of plasma evolution on a kinetic scenario of collisional relaxation of a magnetized plasma
Authors: Erofeev V I 
Published: June 2023

Abstract
For a magnetized plasma, a reduction of the two-time formalism (Erofeev 2019 J. Plasma Phys.
85 905850104, Erofeev 2022 Contrib. Plasma Phys.
62 e202100140) to a highly informative scenario of redistribution of charged particles in momentum due to Coulomb collisions is reported. The consideration focuses on the standard case of an ideal classical ionized homogeneous plasma. It is found that the leading-order approximation of the scenario is consistent with the well-known generalizations of the Lenard–Balescu equation (Lenard 1960 Ann. Phys.
10 390–400, Balescu 1960 Phys. Fluids
3 52–63) that take into account the leading magnetic field effect (Rostoker 1960 Phys. Fluids
3 922–7, Hassan and Watson 1977 Plasma Phys.
19 237–47). A correction to the collision integral of this equation is developed that is due to time variations of plasma parameters.
Study of the erosion and redeposition of W considering the kinetic energy distribution of incident ions through a semi-analytical model
Authors: Cappelli L , Fedorczak N , Gunn J P , Di Genova S , Guterl J , Serre E 
Published: June 2023

Abstract
In today’s nuclear fusion devices, erosion of high-Z metallic plasma-facing materials (PFMs) is mainly caused by physical sputtering. That is, by the exchange of energy between plasma ions and the atoms in the walls. In most of the numerical codes currently in use impinging plasma is approximated as a fluid. By averaging the incident particles’ energy distribution the high-energy population of the eroded material is underestimated. For heavy materials such as W, high-energy eroded particles tend to ionize far from the wall and they are less affected by the sheath electric field hence, not being attracted back to the wall, they have a higher chance to contaminate the core plasma. This could in turn result in an underestimation of the net erosion sources. In this work, a semi-analytical model was developed to include the energy distribution of the incident particles. Then, by Monte Carlo method, the net erosion of tungsten from a smooth PFM was calculated. The results show that the kinetic description in energy is important only for incident particles ionized once. For instance, it is particularly important for plasma ions such as Deuterium. It is seen that Deuterium contribution to the W net sources is not always negligible if compared to light impurities or to tungsten self-sputtering in the range of plasma parameters tested. Finally, results show that the difference between the fluid and kinetic models becomes more pronounced for high-screening plasma conditions.
A first principle investigations for electronic, optical and mechanical response of novel Ba2AgIO6 perovskite
Authors: Karwasara Hansraj , Khan Karina , Pant Nirajan , Acharya Rabin , Adhikari Rajendra , Abdelmohsen Shaimaa A M , Abdelbacki Ashraf M M , Soni Amit , Sahariya Jagrati 
Published: June 2023

Abstract
The double perovskite compound, Ba2AgIO6 has been studied through density functional theory to explore its mechanical, electronic, and optical properties. To examine the mechanical stability of the compound, elastic constants, Young’s modulus, bulk modulus and shear modulus have been computed. The computed electronic properties show the direct band gap semiconducting nature of the studied perovskite compound. The optical properties of Ba2AgIO6 are interpreted with the help of energy dependent dielectric tensor, absorption, reflection, refraction, and energy loss spectra. From the present study it is found that Ba2AgIO6 is suitable for the various photovoltaic and optoelectronic applications.
Image encryption algorithm based on multi-bit superposition and optical chaos
Authors: Weihao Chen , Xuefang Zhou , Le Sun , Minjun Li , Jinyang Liu , Qiliang Li 
Published: June 2023

Abstract
Aiming at the problem that the leakage of single-layer key encryption may lead to the theft of image information, we propose an image encryption algorithm based on multi-bit superposition and optical chaos. The generated optical chaotic sequence is used to encrypt the encrypted image together with the user input key. In the scrambling stage, the 3D-cat map is used to encrypt the bit plane, and the multi-bit superposition method is used to encrypt the key space between the bit planes again by using the sub-block internal and external encryption methods. In the diffusion stage, the Logistic-tent map is used to diffuse the scrambling image to generate the ciphertext image, and the optical chaotic waveform is used as the carrier to mask the ciphertext image information in the transmission process. At the recipient, the ciphertext image information is obtained through the synchronized optical chaotic waveform, and the image is decrypted by using the synchronized optical chaotic sequence and the key transmitted through the secure channel. If only one of the two cannot decrypt the image, the security of image transmission is improved. The simulation results show that the correlation of adjacent pixels of the image encrypted by the algorithm is close to zero, the gray histogram is evenly distributed, the pixel change rate, the normalized average change intensity and the block average change intensity are close to the ideal value, and the sensitivity of the plaintext is further enhanced, which can effectively resist statistical attacks, differential attacks and exhaustive attacks.
The synthesis of MgO and MgO-graphene nanocomposite materials and their diode and photodiode applications
Authors: Yildirim Gamze Bozkurt , Daş Elif 
Published: June 2023

Abstract
The progress of modern life is largely based on technological developments. This is possible with the development of materials that increase the functionality of electronic devices. In this regard, the present work reports the synthesis of MgO and MgO-graphene (MgO-G) composite materials and their device applications. In the first step, MgO and MgO-G nanomaterials synthesis were carried out and then multiple approaches were used to characterize their structural, optical, and morphological properties as an interfacial layer. In the next step, the MgO/n-Si and MgO-G/n-Si device structures were fabricated by using the spin coating method. Finally, their diode and photodiode properties were investigated in the dark and under varied light energy. The dark current-voltage (I–V) measurements show that the MgO-G/n-Si exhibits better electrical properties compared to the MgO/n-Si device. Similar results are observed for the photo I–V measurements as well. The MgO-G/n-Si diode exhibits excellent self-powered photoresponse characteristics with an optical responsivity of 141 mAW−1, light on/off ratio of ∼2.2 × 103 ,and specific detectivity of 9.84 × 108 Jones at −1 V, which is higher than MgO/n-Si diode (0.541 mAW−1, 28.2 and 6.89 x 106 Jones) under the 1 Sunlight intensity. The obtained results show that the fabricated MgO-G/n-Si diode has a promising potential for optoelectronic application.
Visually meaningful image encryption scheme using multi-parameter fractal theory and block synchronous sorting diffusion
Authors: Gan Zhihua , Sun Mengge , Song Yalin , Chai Xiuli , Jiang Donghua , Long Guoqiang , He Xin 
Published: June 2023

Abstract
Traditional visually meaningful image encryption (VMIE) works by embedding a secret image (SI) into a visually meaningful carrier image (CAI), thus achieving the dual protection of both data information and appearance features. However, the current VMIE algorithm still suffers from problems of reconstruction quality and transmission efficiency. To address these issues, this paper proposes an innovative VMIE algorithm that utilizes a newly designed two-dimensional hyperchaotic map, multi-parameter fractal matrix (MPFM) theory and compressive sensing. The proposed algorithm achieves dual protection of both the semantic information and appearance image data. First, a newly designed 2D infinite triangle folding map (2D-ITFM) is presented to generate a binary key-controlled measurement matrix to measure and compress a plain image (PI) to generate measured image (MI) and decrease the amount of transmission information. Next, based on the hyperchaotic map 2D-ITFM and MPFM, we present the inter-block scrambling (IBS) algorithm and intra-block synchronous sorting diffusion (IBSSD) algorithm, which are used to process the MI and generate SI. Then, the matrix encoding embedding (MEE) technique is utilized to hide the SI into the CAI to produce a visually secure cipher image (CII). Finally, the experimental results demonstrate that our scheme is effective in improving the anti-attack ability while guaranteeing good imperceptibility and reconstruction performance. This scheme can be employed in the field of information security communication.
The Goos-Hänchen shift analysis in optical lattices under the parity-time symmetry
Authors: Badshah Fazal , Malik Huma , Ali Anwar , Huang Haibo , Ziauddin  
Published: June 2023

Abstract
This article investigates the Goos-Hӓnchen(GH) shift of the reflected light of an ensemble of optical lattices in a cavity. We consider a lambda-type ensemble of three-level atoms to form the optical lattice and apply three fields, two weak fields (probe and microwave) and one strong field. The microwave field transforms the medium into a gain medium, resulting in the optical lattice containing both loss and gain. The co-existence of gain and loss leads to parity-time symmetry in the system. By satisfying the parity-time symmetry condition, we can modify the magnitude of the GH shift. Our results suggest that the GH shift can be controlled in systems exhibiting parity-time symmetry.
Revisiting boundary-driven non-equilibrium Markov dynamics in arbitrary potentials via supersymmetric quantum mechanics and via explicit large deviations at various levels
Authors: Monthus Cécile 
Published: June 2023

AbstractFor boundary-driven non-equilibrium Markov models of non-interacting particles in one dimension, either in continuous space with the Fokker–Planck dynamics involving an arbitrary forceF(x) and an arbitrary diffusion coefficientD(x), or in discrete space with the Markov jump dynamics involving arbitrary nearest-neighbor transition ratesw(x±1,x), the Markov generator can be transformed via an appropriate similarity transformation into a quantum supersymmetric Hamiltonian with many remarkable properties. We first describe how the mapping from the boundary-driven non-equilibrium dynamics towards some dual equilibrium dynamics (see Tailleuret al2008J. Phys. A: Math. Theor.41505001) can be reinterpreted via the two corresponding quantum Hamiltonians that are supersymmetric partners of each other, with the same energy spectra. We describe the consequences for the spectral decomposition of the boundary-driven dynamics, and we give explicit expressions for the Kemeny times needed to converge towards the non-equilibrium steady states. We then focus on the large deviations at various levels for empirical time-averaged observables over a large time-windowT. We start with the always explicit Level 2.5 concerning the joint distribution of the empirical density and of the empirical flows before considering the contractions towards lower levels. In particular, the rate function for the empirical current alone can be explicitly computed via the contraction from the Level 2.5 using the properties of the associated quantum supersymmetric Hamiltonians.
The UHURA project at a glance – motivation and objectives
Authors: Hasabnis A , Wild J , Strüber H , Moëns F , van Rooijen B , Maseland H 
Published: June 2023

Abstract
The European H2020 project UHURA is focusing on the unsteady flow behaviour around high-lift systems and will first time deliver a deeper understanding of critical flow features at new types of high-lift devices of transport aircraft during their deployment and retraction together with a validated numerical procedure for its simulation. UHURA performed detailed experimental measurements in several wind tunnels to obtain a unique data set for validation purposes of Computational Fluid Dynamics (CFD) software, including detailed flow measurements by Particle Image Velocimetry (PIV) and other optical measurement technologies. Advanced CFD methods promising significant improvements in the design lead time are validated against this database to obtain efficient and reliable prediction methods for design.
Krueger Design and Motion Requirements
Authors: Wild J , Strüber H , Vervliet A 
Published: June 2023

Abstract
The industrial valid design of a folding bull nose Krueger leading edge device will be presented. It serves as a geometrical basis for the UHURA project, which investigates the retraction and deployment process with numerical and experimental means.
A set of realistic aerodynamic and kinematic requirements was applied, such as deflection angle range and deployed target position to enable insect shielding. In order to achieve an industrial relevant design solution of a Krueger device, realistic space allocation constraints and structural keep-out-zones were defined within the fixed leading edge.
Numerical shape optimization of the Krueger device was performed to balance size, shape and deployed position with optimal aerodynamic performance, respecting the given requirements and constraints.
Based on that, layout and sizing of the kinematic structural and connecting elements was carried out. Industrial viability was ensured by applying aerospace design rules, as well as relevant material selection, deformation and tolerance analysis.
Development of the initial certification and technology roadmap for the FUTPRINT50 framework
Authors: Moebs N , Reis R , Windels E , Ertman K , van Woensel C , Kipouros T , Westin M , Strohmayer A 
Published: June 2023

Abstract
The main goal of the research project FUTPRINT50 is the acceleration of the introduction of a hybrid-electric regional aircraft. One essential part of this project is to develop a roadmap which couples the technological development with its associated research infrastructure and regulatory aspects. This aims at maximizing the likelihood of a successful hybrid-electric 50-seat regional aircraft with a projected entry-into-service by 2035/2040. This article presents the roadmap framework and methodology worked out by FUTPRINT50. Additionally, it shows the findings of the consortium about key enabling technologies and testing infrastructures necessary to achieve the final integrated demonstrators that provide evidence for lowering the risk of adoption and for bridging mapped regulatory gaps in regard to hybrid-electric propulsion. Furthermore, links to other complementary roadmaps are highlighted. Detail is given on the status of work and follow-up actions towards its completion.
Technology readiness assessment and performance forecast on a 19 seats E-STOL EIS 2032
Authors: Cozzolino Aniello , Apuleo Gianvito , D’Alesio Paolo 
Published: June 2023

Abstract
The European Flightpath 2050 connectivity goal, to enable European people to reach any desired destination, door to door, in 4 hours, increases the interest in Small Air Transportation (SAT), to enhance global connectivity.
The connectivity goal should come alongside with environmental target: FlightPath 2050 aims to reduce by 75% C02 emissions and by 90% NOx emissions. Within the EU Clean Sky 2 framework, a future affordable and green commuter belonging to EASA CS 23 has been designed, collecting all the novel technologies developed in the CleanSky 2 frame [1].
This work presents a further step on the 19-seater development: a technology readiness and assessment to electrify the short take-off and landing (STOL) aircraft is presented, considering the expected entry into service (EIS) in 2032, rationalizing the design choices considered as most suitable to obtain a hybrid electric E-STOL and the consequent gains in terms of emission reduction on a typical mission range.