bluuebunny/crossref_metadata_2025_split huggingface dataset:
Collective motion in γ-unstable nuclei within energy-dependent Davidson potential and deformation dependent mass formalisms
Authors: Baid S , Lahbas A , Oulne M 
Published: January 2022

Abstract
In this work, we propose an exactly solvable model which is constructed by considering energy-dependent Davidson potential in the β part of the generalized version of the collective quadrupole Bohr Hamiltonian (BH) within deformation-dependent mass (DDM) formalism. Analytical expression of the energy spectra and corresponding wave functions are derived by means of the asymptotic iteration method. The combined effect of DDM and the energy dependence of the potential coupling constant is duly investigated. Also, the numerical calculations of the electric quadrupole transition ratios and energy spectrum of several nuclei undergoing a γ-unstable shape phase transition are performed and compared with experimental data as well as with other theoretical models. Besides, we investigate the correlation between both formalisms: energy-dependent potential and DDM, through solutions of BH for transition nuclei in the limit E(5) with Davidson potential.
A versatile technology for colloidal crystal transfer using parylene coatings and hydrosoluble polymers
Authors: Ushkov Andrei A , Dellea Olivier , Lebaigue Olivier , Poncelet Olivier , Verrier Isabelle , Lefkir Yaya , Jourlin Yves 
Published: January 2022

Abstract
We propose a novel versatile colloidal crystal transfer technique compatible with a wide range of water-insoluble substrates regardless of their size, material, and wettability. There are no inherent limitations on colloidal particles material and size. The method possibilities are demonstrated via the colloidal transfer on quartz, glass substrates with a flat and curved surface, and via the fabrication of 3D colloidal structure with 5 overlaid colloidal monolayers. The process occurs at a room temperature in water and is independent from the illumination conditions, which makes it ideal for experimental manipulations with sensitive functional substrates. We performed the nanosphere photolithography process on a photosensitive substrate with a transferred colloidal monolayer. The metallized hexagonal arrays of nanopores demonstrated a clear resonant plasmonic behavior. We believe that due to its high integration possibilities the proposed transfer technique will find applications in a large-area surface nanotexturing, plasmonics, and will speed up a device fabrication process.
Analysis of secondary emission mechanism in electron avalanches propagating in cylindrical nanoruptures in liquid water
Authors: Bonaventura Zdeněk , Bílek Petr , Tungli Ján , Šimek Milan 
Published: January 2022

Abstract
Recently, a bouncing-like mechanism for electron multiplication inside long nano-ruptures during the early stages of nanosecond discharge in liquid water has been proposed in (Bonaventura 2021 Plasma Sources Sci. Technol.
30 065023). This mechanism leads to the formation of electron avalanches within nano-ruptures caused by strong electrostrictive forces. The avalanche propagation is a self-sustaining process: the electrons emitted from the water surface to the cavity support the propagation of the avalanche and the avalanche itself is a source of the parent electrons impinging on the surface of the nano-rupture and causing secondary emission. We analyze the process of the electron secondary emission directly from the simulation results of the electron avalanche propagation. This allow us to perform an in situ study of the secondary emission and related physical processes. We present the results of an extensive parametric study performed using the state-of-the-art simulation toolkit Geant4-DNA for modeling electron-liquid water interactions. It is shown that the typical lifetime of an electron in an avalanche is about 0.1 to 0.2 picoseconds and that the electron experiences about 4 bounces before ending up in liquid water. In addition, it is shown that the secondary electrons are formed in a layer adjacent to the nano-rupture surface that is only a few nanometres thin. The secondary electron velocity distribution at the moment of the electron birth, the velocity space of electrons (re-)emitted from the water, and the velocity space of electrons at the moment of their impact to the cavity surface are analyzed in detail. Electron bouncing and secondary electron generation efficiency are quantified using the secondary emission coefficient, the secondary emission efficiency, and the effective energy consumed to produce new electrons.
Design, simulation, and experimental investigation on a novel multi-mode piezoelectric acoustofluidic device for ICF target manipulation
Authors: Wang Xin , Wang Liang , Feng Haoren , Jin Jiamei , Yin Qiang 
Published: January 2022

Abstract
The Inertial Confinement Fusion (ICF) targets are hollow glass microspheres with strong viscosity, easy agglomeration, small diameter, and fragile structure. The size and morphology of the ICF target are crucial to the success of ICF experiment. To obtain qualified targets, the manual detection method and automatic detection systems are mainly employed. However, hard contact existed between the targets and the manipulation platform in both methods, which may cause target damage. To solve this issue, a novel multi-mode piezoelectric acoustofluidic manipulation device is proposed to achieve the non-contact manipulation of sub-millimeter size ICF targets during detection process. The proposed device mainly consists of a disk-shaped container and a four-transducer array. Standing and traveling vibration modes can be separately stimulated in the container when the four-transducer array is excited with a specific signal sequence. The modal simulation is first conducted to determine the dimensional parameters and required vibration modes. Furthermore, the acoustic streaming field simulation is used to verify the effectiveness of the modal simulation and interpret the manipulation mechanism. Then, the correctness of the simulation results is demonstrated through the experiments. In the experiments, the influences of the driving frequency, target diameter, and excitation voltage on the linear manipulation are investigated through an image recognition program, respectively. The target can be linearly manipulated, and has a maximum speed of 19.10 mm s−1 at 21.5 kHz. Furthermore, with the increase of the target diameter and excitation voltage, the speed of the target increases. Finally, the rotational manipulation of the targets are conducted, and the target can effectively rotate in the container at the driving frequency of 24.6 kHz. The proposed acoustofluidic manipulation device holds the merits of simple structure, low-frequency, multi-mode, and large particle manipulation ability, which may provide technical support for the detection and filter of ICF targets.
One-dimensional traveling wave type linear piezoelectric moving platform driven by a new two-frequency two-mode excitation method
Authors: Tai Shih-Lun , Lee Chih-Kung 
Published: January 2022

Abstract
The traveling waves of linear traveling wave type piezoelectric motors are not easy to stabilize due to its finite boundary structure. The traditional two-mode excitation method is a method which can excite two modes to generate traveling waves in a finite structure. However, the drawback of the traditional method is that it does not allow for adjustment of the final output velocity. Also, this method is characterized by having low efficiency. The velocity of the generated traveling waves is constant unless the excited modes are changed. In this paper, we propose a novel method, called a two-frequency two-mode excitation method which uses a piezoelectric actuator to simultaneously excite two modes to generate traveling waves. The two frequencies chosen possess a ratio where the excited frequencies are close to two resonant modes. In addition, the two excited frequencies are simultaneously an integer ratio to a specific frequency and have a least one common multiple, as small as possible. This approach can generate stable traveling waves such that the velocity of the traveling waves can be adjusted by the two frequencies. Our theoretical predictions were validated by numerical calculations and experimental data. A Hilbert transform was used to optimize the traveling waves generated. A morphological opening was used to track the traveling wave trajectories. The obtained results show that this method can generate stable traveling waves where the wave velocity can be adjusted by mixing the frequency signals.
Interface electrode and enhanced actuation performance of SiO2-GO/PFSA-based IPMC soft actuators
Authors: Tian Aifen , Sun Yue , Li Jiahua , Zhang Xinrong , Feng Bin , Du Huiling 
Published: January 2022

Abstract
In this study, ‘three-dimensional structure’ nanohybrid particle (SiO2-GO) were synthesized by in situ hydrolysis and composited with perfluorosulfonic acid (PFSA) to increase the water uptake (WUP) and ion exchange capacity (IEC) of the cast membranes. Ionic polymer metal composite (IPMC) soft actuators were fabricated based on the cast pure PFSA, GO/PFSA and SiO2-GO/PFSA membranes. The morphology and properties of IPMC were researched, and the relationship between them was analyzed in this article. The mechanism of SiO2-GO particles enhancing the properties of IPMC was revealed. The effects of incorporating GO and SiO2-GO on IPMC actuators were analyzed using physicochemical and electromechanical measurements comparing with the corresponding behavior of pure PFSA-based IPMC actuators. Morphology of IPMC showed effective incorporation of GO and SiO2-GO and clarified the dependency of Pt interface electrode on the SiO2-GO content of the PFSA membranes. The addition of SiO2-GO increased dramatically the WUP and IEC of the PFSA membranes and autuation performance of the IPMC actuators. The IPMC with 1 wt% SiO2-GO showed superb properties. The displacement of 1 wt% SiO2-GO under 3 V AC voltage reached 28.4 mm, which is 3.2 times higher than that of the pure PFSA. The maximum displacement under DC voltage reached 44.7 mm (5.5 V), and the blocking force reached 43.2 mN (5 V), which increased respectively 1.1 times and two times.
Robust half-metallic spin-gap in Co2CrAl: doping and strain engineering
Authors: Islam A , Zulfiqar M , Nazir S , Ni Jun 
Published: January 2022

Abstract
Half-metallic ferromagnetic (HM FM) materials with sizeable HM-gap have grabbed a lot of attention as they provide high spin-filtering and reduce the spin-flipping, which are necessary parameters for the manufacturing of magnetic memory devices. Herein, the effect of 3d transition metals (TM = Ti, V, Mn, and Fe) doping at Cr site on the electronic and magnetic properties of full-Heusler Co2CrAl compound is investigated utilizing ab-initio calculations. The negative formation energies for all doped systems confirm their structural stability at ambient pressure. Our results revealed that undoped and all the TM-doped systems exhibit a stable HM FM state. The Cr d

yz
and

d

3

z

2

−

r

2

orbitals are mainly responsible for conductivity in the spin-majority channel with a small contribution from d

xy
/

d

x

2

−

y

2

states in each case. It is also found the admixture of t
2g
and e

g
characteristics of TM ions in the spin-magnetization density iso-surfaces, where magnetism is discussed by analyzing the electronic spin state configurations. Moreover, it is found that half-metallicity in all systems is robust and can be preserved by the compression/elongation of the unit cell volume up to 10%. Finally, the Bader charge analysis exhibits that all the motifs contain a mixture of covalent and ionic characteristics. Hence, the present work suggests that 3d TM-doped Co2CrAl structures are of great interest for the development of extremely capable data storage devices.
Electronic structure models for lead chalcogenide system
Authors: Hamodi A , Mahmood Natheer B , Hamodi Y I , Saeed Farqad R , Naji K K 
Published: January 2022

Abstract
Pb1-x
Sn
x
Te is a topological crystalline insulator system with an even number of band Dirac cone at 001,110 and 111 orientations, which represent a trivial system under Kane Mele classification. However, in the past few years, the topological surface states feature in Pb1-x
Sn
x
Te that protected by mirror symmetry drew attention. In contrast to Kane Mele’s topological material that protects by time-reversal symmetry. Pb1-x
Sn
x
Te system has a crystal structure phase transition that can drive the topological features of the system. A systematic study on the energy band gap versus temperature and composition shows an interesting regime at x = (0.3–0.7) and T = 70–130 K. (i.e. the topological crystalline insulator regime, phase transition regime). In this paper, we focused on how the following parameters (energy bandgap, temperature T, composition x) connect by three stander models.
Quantized vortices in superfluid dark matter
Authors: Mauland R. , Elgarøy Ø. 
Published: January 2022

Abstract
In 2015 Berezhiani & Khoury proposed a Superfluid Dark Matter (SFDM) model where dark matter condenses and forms a superfluid on galactic scales. In the superfluid state phonons interact with baryons, resulting in a behavior similar to that of Modified Newtonian Dynamics (MOND). If one assumes that the DM condensate rotates along with the galaxy, a grid of vortices should form throughout the superfluid component if the rotation is fast enough. We aim to investigate the size and impact of the vortices on surrounding baryons, and to further investigate the parameter space of the model. We also look for a possible vortex solution of the Lagrangian presented for the SFDM theory. We first take a simple approach and investigate vortex properties in a constant density DM halo, applying knowledge from condensed matter physics. We then use the zero-temperature condensate density profile as a template to vary the DM particle mass and the energy scale, Λ, of the SFDM model. Further, we attempt to find a vortex solution of the theory by extracting the Euler-Lagrange equation with respect to the modulus of the condensate wavefunction from the full relativistic SFDM Lagrangian. For the constant density approach we find that the vortices are on millimeter scale, and separated by distances ∼0.002 AU. The parameter space of the model is found to be substantial and a reduction in the DM particle mass leads to larger vortices with a higher energy. However, none of the parameter combinations explored here give both realistic values of Λ and vortices energetic enough to have an observational impact on the galaxy as a whole. The vortex equation extracted from the Lagrangian of the model is unstable, and no solution exhibiting the standard properties of a vortex solution is found.
Retraction: God particles in the perspective of The AlQuran Surah Yunus: 61 and modern science (J. Phys.: Conf. Ser.
795 012014)
Authors: Jumini Sri 
Published: January 2022

This paper was retracted by IOP Publishing on 14 August 2020.
IOP Publishing was notified of concerns regarding the quality of this paper on 30th June 2020. The IOP
Publishing Research Integrity Panel immediately launched an investigation, and it was discovered that
this paper was accepted for publication by the conference organisers despite serious objections by the
reviewer. IOP Publishing agree with the reviewer's comments that this work is unscientific and unsuitable
for publication.
This is in violation of the IOP Publishing Proceedings Peer Review Policy and the contract signed by
the conference organisers. IOP Publishing therefore retracts this paper based on breach of contract and
compromised peer review process.
Retraction published: 14 August 2020
Sustainability of rural agribusiness through e-commerce information systems
Authors: Huaraca Aparco Rosa , Del Carmen Delgado Lime María , Tapia Tadeo Fidelia , Taipe Pardo Fredy , Palomino Rincón Henry , Mescco Cáceres Edwin , Valverde Mamani Grecia , Sánchez VíctorChacón , Guzmán Nery porcel 
Published: January 2022

Abstract
Summary. Agribusiness is one of the strategies to improve food security, however, part of its activities need to be enhanced through different strategies, including the implementation of ecommerce information systems that can help chains promote their sustainability. The objective of the research was to characterize and develop an e-commerce strategy in rural agribusiness composed of rural associations from the province of Andahuaylas, Peru. The study is qualitative descriptive through the historical-logical, interview, theoretical triangulation and modeling were used, with a sample of four associations producing milk, Andean grains, guinea pig breeding and organic vegetables from the rural sector of the study area. It was possible to characterize the activities, finding an inefficient integration of information systems in commercial management. As a strategy, e-commerce was implemented through digital marketing techniques to attract new commercial allies and potential consumers according to their situation of each productive activity that constitutes rural agribusiness. The application of e-commerce contributes to increasing the efficiency of the associations that make up rural agribusiness.
The evolution of precipitation on the Romanian Black Sea coast during 1965-2016, from the perspective of regional and global climate changes
Authors: Boşneagu Romeo , Toricà Elena Coca Carmen , Lupu Sergiu , Lupu Carmen , Pàtràu Daniel Dăneci 
Published: January 2022

Abstract
Atmospheric precipitation and air humidity are the most important meteorological parameters in characterizing the climate of a region. Global warming, among its many effects can also lead to changes in types of precipitation, which could produce a chain reaction, reducing rainfall in already dry areas. Also, the reverse effect of increasing the amounts of precipitation following the intensification of extreme phenomena is analyzed. The present study is an analysis of the precipitations on the Romanian seaside in the period 1965-2019, in order to foresee the evolution of these, compared to the multiannual averages and to make a prediction of evolution, necessary for sustainable development in this region.
Drinking water attribute preferences for sustainable management in Andahuaylas, Peru
Authors: Huaraca Aparco Rosa , Palomino Rincon Henry , Mescco Caceres Edwin , Valverde Mamani Grecia , Nelida Ascue Ruiz Rosa , Kari Ferro Aydee , Alvares Arias Celinda , Porcel Guzmán Nery 
Published: January 2022

Abstract
The management of sustainable drinking water is oriented under the framework of the alignments of economic development. The objective was to determine the preferences of the attributes of drinking water for an improvement in the management of the service, in the province of Andahuaylas, Peru. A quantitative research was carried out through the method of experiments of choice of the mixed logit type. The experimental design was descriptive and cross-sectional with a sample of 375 randomly selected households. The technique applied was the survey with cards of choice included socioeconomic characteristics, attributes of drinking water and availability to pay. The results show attribute preferences; have water 24 hours a day, recover lagoon or spring water sources and water pressure, with a positive impact on the user. Likewise, users have a positive impact of willingness to pay with an additional increase in their monthly billing with a preference in improving the continuity of drinking water 24 hours a day and the recovery of lagoons or manantes Households are willing to pay an additional amount in their rates for the management of safe and sustainable water.
Comparative study of additively manufactured samples of tungsten with molybdenum and their applications
Authors: Atif Abbas Mirza , Anru Yan , Yong Wang Zhi 
Published: January 2022

Abstract
This article is a comparative study of tungsten (W) and molybdenum (Mo) samples manufactured by selective laser melting (SLM).Under the processing parameters different microstructural and mechanical properties like strain energy density, micro-hardness and surface morphology were investigated. Before the preparation of samples the SEM and XRD images were taken to calculate the size of micro particles of both the samples. These samples were further investigated by OM(optical microscopy),SEM(scanning electron microscope),EBSD(electron backscattering diffraction) and Vicker hardness to study the crystallographic structure, hardness, grain boundaries to understand a brief comparison between these two fourth group elements. It was identified as the cause of a very prominent structure with cracked features and a residual remains. During processing, different processing factors were examined, which separates at the edges of the grain, thereby creating thermal cracks. This due to the low eutectic melting compared to the matrix phase. These factors also result in a higher Ductile-to-Brittle Transition (DBTT). Later, during rapid cooling from the melting point, a combination of cracks with hot cracks on the borders of solid grain grains and cold cracks near weak grain edges forms a cracked network, which is often found in tungsten and molybdenum refined SLM. Neither does a very hot substrate plate prevent the formation of cracks in the metals formed by processing parameters. These materials are appropriate for high temperature up to more than 20000C such an analytic and inner wall constituents of fusion reactor or experiments. Parameters like laser power, scan speed, hatching space and the thickness of the powder layer are analyzed to achieve the high density samples. Three-dimensional printing is changing the way we make things in almost every industry, from cars to medical equipment to biotech.3D printing to prototype one of the most critical enabling technology in a building, the heat exchanger. In comparison to current designs, this next-generation heat exchanger weighs 20% less, performs 20% better, and can be produced much faster.
Digital regulation of gas turbine engine on start modes
Authors: Tarasenko O.I. , Tarasenko A.O. , Radchenko M. , Scurtu I. C. , Volintiru O.N. , Sichko V. 
Published: January 2022

Abstract
A gas turbine engine (GTE) with a free power turbine driven by an electric generator is considered. The GTE has an automatic computerized control system (ACS). The fuel for the gas turbine engine is natural gas. The fuel dosage is managed by computer in the moment of ignition, during the start and the idle operation of gas turbine engine.