bluuebunny/crossref_metadata_2025_split huggingface dataset:
Analysis of the Measurement Properties of the Female Sexual Function Index 6-item Version (FSFI-6) in a Postpartum Brazilian Population
Authors: Guendler Julianna de Azevedo , Amorim Melania Maria , Flamini Maria Eduarda Melo , Delgado Alexandre , Lemos Andrea , Katz Leila 
Published: March 2023

Abstract
Objective We evaluated internal consistency, test-retest reliability, and criterion validity of the Brazilian Portuguese version of the Female Sexual Function Index 6-item Version (FSFI-6) for postpartum women.
Methods Therefore, questionnaires were applied to 100 sexually active women in the postpartum period. The Cronbach α coefficient was used to evaluate the internal consistency. Test-retest reliability was analyzed by Kappa for each item of the questionnaire and by the Wilcoxon parametric test, comparing the total scores of each evaluation. For the assessment of criterion validity, the FSFI was used as the gold standard and the receiver operating characteristic (ROC) curve was constructed. Statistical analysis was performed using IBM SPSS Statistics for Windows, version 21.0 (IBM Corp., Armonk, NY, USA). It was found that the internal consistency of the FSFI-6 questionnaire was considerably high (0.839).
Results The test-retest reliability results were satisfactory. It can also be stated that the FSFI-6 questionnaire presented excellent discriminant validity (area under the curve [AUC] = 0.926). Women may be considered as having sexual dysfunction if the overall FSFI-6 score is < 21, with 85.5% sensitivity, 82.2% specificity, positive likelihood ratio of 4.81 and negative likelihood ratio of 0.18.
Conclusion We conclude that the Brazilian Portuguese version of FSFI-6 is valid for use in postpartum women.
Navigating biosafety concerns within COVID-19 do-it-yourself (DIY) science: an ethnographic and interview study
Authors: Wexler Anna , Choi Rebekah , Pearlman Alex , Rasmussen Lisa M. 
Published: March 2023

AbstractNon-establishment or do-it-yourself (DIY) science involves individuals who may not have formal training conducting experiments outside of institutional settings. While prior scholarship has examined the motivations and values of those involved in the subset of DIY science known as “DIY biology,” little research has addressed how these individuals navigate ethical issues in practice. The present study therefore aimed to understand how DIY biologists identify, approach, and resolve one particular ethical issue—biosafety—in their work. We conducted a digital ethnography of Just One Giant Lab (JOGL), the primary hub for DIY biology during the COVID-19 pandemic, and subsequently conducted interviews with individuals involved with JOGL. We found that JOGL was the first global DIY biology initiative to create a Biosafety Advisory Board and develop formal biosafety guidelines that applied to different groups in multiple locations. There was disagreement, however, regarding whether the Board should have an advisory role or provide mandatory oversight. We found that JOGL practiced ethical gatekeeping of projects that fell outside the limits defined by the Board. Our findings show that the DIY biology community recognized biosafety issues and tried to build infrastructure to facilitate the safe conduct of research.
How armed militancy transformed power relations in the oil communities of Nigeria’s Niger Delta
Authors: Ebiede Tarila Marclint 
Published: March 2023

ABSTRACT
This article analyses the dynamics of conflicts in local communities in the Niger Delta. The article argues that militants associated with armed groups gained significant power in communities due to their dominant roles in the persistent violent conflicts that have plagued the Niger Delta over the last two decades. This is evident in how those associated with armed militant groups influence and control community governance institutions in the region. However, people who are not aligned with militia groups are beginning to challenge the hegemony of those associated with militia groups. This process defines the prevailing dynamics of power relations in the area.
Insight into the intrinsic microstructures of polycrystalline SnSe based compounds
Authors: Xue Wenhua , Li Shan , He Huolun , Zhi Shizhen , Li Xiaofang , Bai Fengxian , Chen Chen , Mao Jun , Wang Yumei , Zhang Qian 
Published: March 2023

Abstract
SnSe based compounds have attracted much attention due to the ultra-low lattice thermal conductivity and excellent thermoelectric properties. The origin of the low thermal conductivity has been ascribed to the strong phonon anharmonicity. Generally, the microstructures are also effective in scattering the phonons and further reducing the lattice thermal conductivity. In this work, the microstructures of undoped SnSe and Bi-doped Sn0.97SeBi0.03 have been investigated by transmission electron microscopy. A characteristic microstructure of lath-like grains has been observed in SnSe based compounds from perpendicular to the pressure direction. In addition, there exist a large quantity of low-angle grain boundaries and a high concentration of edge dislocations and stacking faults in the grains. All these microstructures result in lattice mismatch and distortion and can act as the phonon scattering centers, which broaden the understanding of the low thermal conductivity of SnSe based compounds.
α-Fe2O3-based artificial synaptic RRAM device for pattern recognition using artificial neural networks
Authors: Jetty Prabana , Mohanan Kannan Udaya , Jammalamadaka S Narayana 
Published: March 2023

Abstract
We report on the α -Fe2O3-based artificial synaptic resistive random access memory device, which is a promising candidate for artificial neural networks (ANN) to recognize the images. The device consists of a structure Ag/α-Fe2O3/FTO and exhibits non-volatility with analog resistive switching characteristics. We successfully demonstrated synaptic learning rules such as long-term potentiation, long-term depression, and spike time-dependent plasticity. In addition, we also presented off-chip training to obtain good accuracy by backpropagation algorithm considering the synaptic weights obtained from α-Fe2O3 based artificial synaptic device. The proposed α-Fe2O3-based device was tested with the FMNIST and MNIST datasets and obtained a high pattern recognition accuracy of 88.06% and 97.6% test accuracy respectively. Such a high pattern recognition accuracy is attributed to the combination of the synaptic device performance as well as the novel weight mapping strategy used in the present work. Therefore, the ideal device characteristics and high ANN performance showed that the fabricated device can be useful for practical ANN implementation.
Cross sections in He+ + H collisions for the energy region 1–100 keV u−1
Authors: Igarashi A , Kato D 
Published: March 2023

Abstract
We have calculated the cross sections for the elastic, excitation, electron capture, and ionization processes in He+ + H collision using a semiclassical atomic orbital close-coupling method within two-electron treatment. The calculated data are compared with those of the experiments and previous theoretical calculations. The excitation cross sections to H(n = 2) states are in good agreements with the measurements of Geddes et al. The Balmer-alpha emission cross section of H is about half the size of the experimental data of Donnelly et al. The electron capture cross section is close to the experimental data of Lockwood et al and Olson et al. The ionization cross section is in accord with the experimental data of Hsu et al.
Two-dimensional horizontal visibility graph analysis of human brain aging on gray matter
Authors: Huang-Jing Ni , Ruo-Yu Du , Lei Liang , Ling-Ling Hua , Li-Hua Zhu , Jiao-Long Qin 
Published: March 2023

Abstract
Characterizing the trajectory of the healthy aging brain and exploring age-related brain structural changes can help deepen our understanding of the mechanism of brain aging. Currently, most structural magnetic resonance imaging literature explores brain aging merely from the perspective of morphological features, which cannot fully utilize the gray-scale values containing important intrinsic information about brain structure. In this study, we proposed to construct two-dimensional horizontal visibility graphs based on the pixel intensity values of the gray matter slices directly. Afterward, the normalized network structure entropy (NNSE) was introduced to quantify the overall heterogeneities of these graphs. The results demonstrated decreased between the NNSEs of gray matter and ages. Compared with the middle-aged and the elderly, the larger values of the NNSE in the young group may indicate the more homogeneous network structures, the smaller differences in importance between nodes, and thus a more powerful intrusion tolerance ability. In addition, the hub nodes of different adult age groups are primarily located in the precuneus, cingulate gyrus, superior temporal gyrus, inferior temporal gyrus, parahippocampal gyrus, insula, precentral gyrus, and postcentral gyrus. Our study can provide a new perspective for understanding and exploring the structural mechanism of brain aging.
Effects of collisional ion orbit loss on tokamak radial electric field and toroidal rotation in an L-mode plasma
Authors: Zhu Hongxuan , Stoltzfus-Dueck T. , Hager R. , Ku S. , Chang C.S. 
Published: March 2023

Abstract
Ion orbit loss has been used to model the formation of a strong negative radial electric field E

r
in the tokamak edge, as well as edge momentum transport and toroidal rotation. To quantitatively measure ion orbit loss, an orbit-flux formulation has been developed and numerically applied to the gyrokinetic particle-in-cell code XGC. We study collisional ion orbit loss in an axisymmetric DIII-D L-mode plasma using gyrokinetic ions and drift-kinetic electrons. Numerical simulations, where the plasma density and temperature profiles are maintained through neutral ionization and heating, show the formation of a quasisteady negative E

r
in the edge. We have measured a radially outgoing ion gyrocenter flux due to collisional scattering of ions into the loss orbits, which is balanced by the radially incoming ion gyrocenter flux from confined orbits on the collisional time scale. This suggests that collisional ion orbit loss can shift E

r
in the negative direction compared to that in plasmas without orbit loss. It is also found that collisional ion orbit loss can contribute to a radially outgoing (counter-current) toroidal-angular-momentum flux, which is not balanced by the toroidal-angular-momentum flux carried by ions on the confined orbits. Therefore, the edge toroidal rotation shifts in the co-current direction on the collisional time scale.
Modulation behaviour and possible existence criterion of geodesic acoustic modes in tokamak devices
Authors: Palermo F. , Conway G.D. , Poli E. , Roach C.M. 
Published: March 2023

Abstract
Geodesic acoustic modes (GAMs) represent the oscillating counterpart of zonal flow in tokamak plasma and can affect transport due to their interaction with turbulence eddies. GAMs have been observed in many experiments and modelled under different conditions, but because of their variety of characteristics, we do not yet have a complete picture of their dynamics. It has been demonstrated that optical methods can be efficiently used to describe and predict several characteristics of the GAM radial structures that can be interpreted as ‘waves’ propagating in the space-time. We exploit complex eikonal theories to investigate the behavior of GAMs that are commonly observed in experiments, and find that their periodic modulation and intermittency can be explained by the properties of the equilibrium temperature profile. Theoretical results obtained in this work are supported by gyrokinetic simulations for several equilibria. Implications for existence criteria and GAM dynamics in different plasma equilibrium conditions are discussed, with particular attention to the edge plasma in low and high confinement modes.
33Cl Spectroscopic Factors via the 32S(3He, d)33Cl One-Proton Transfer Reaction
Authors: Cinausero M , Dell’Aquila D , Lombardo I , Vigilante M , Barlini S , Bolzonella R , Bruno M , Buccola A , Cartuan S , Casini G , Cicerchia M , D’Andrea M , Degerlier M , Fabris D , Gasques L , Gramegna F , Lepine-Szily A , Mantovani G , Marchi T , Piantelli S , Rigato V , Scomparin L , Valdrè S 
Published: March 2023

Abstract
The structure of light-to-medium mass nuclei is crucial to understand exotic phenomena in nuclear structure, including the appearance of molecular effects in light nuclei and their impact in nuclear astrophysics. In this paper, a new experiment to probe one-proton spectroscopic factors of bound and unbound states in the sd-nucleus 33Cl is discussed. The experiment exploits the reaction 32S(3He, d)33Cl* at 9.68 MeV bombarding energy. This reaction is suitable to probe the single-particle structure of 33Cl states with respect to the population of 1d
3/2, 1f
7/2 and 2p
3/2 shells. Crucial aspects of the investigation are the use of an enriched, high-purity, 32S target and a new generation hodoscope with improved angular resolution, allowing to obtain high-precision angular distribution of the differential cross section in a broad angular range. Results are interpreted by means of finite-range DWBA and coupled-channel calculations.
Heavy-ion induced quasi-elastic reactions in view of the NUMEN project
Authors: Cavallaro M , Agodi C , Auerbach N , Bellone J I , Bijker R , Brischetto G A , Burrello S , Calabrese S , Cappuzzello F , Carbone D , Ciraldo I , Colonna M , De Gregorio G , Delaunay F , Ferreira J L , Fisichella M , Gambacurta D , García-Tecocoatzi H , Gargano A , Lay J A , Lenske H , Linares R , Lubian J , Santopinto E , Sgouros O , Soukeras V , Spatafora A , Torresi D 
Published: March 2023

Abstract
Double charge exchange (DCE) reactions induced by heavy ions and other direct reactions characterized by same projectile and target are crucial tools to access information relevant for neutrinoless double beta decay nuclear matrix elements. In this context the NUMEN project aims to investigate, for each system of interest, not only the DCE channel but also the whole set of reactions promoted by the same projectile/target interaction in the same experimental conditions and within the same theoretical framework. An example of the application of such a multi-channel approach is presented here.
Electron Scattering for Neutrino Physics at MAMI and MESA
Authors: Doria Luca 
Published: March 2023

Abstract
The groundbreaking discovery of neutrino oscillations represents a concrete indication of new physics and the measurement of the oscillation parameters has the potential to unlock new knowledge on the fundamental building blocks of matter. For measuring the neutrino properties to percent-level precision, an ambitious accelerator-based experimental program was started by two international collaborations: HyperK and DUNE. However, these experiments will only be able to achieve their unprecedented precision goal if our current knowledge of neutrino-nucleus interactions in the detectors is dramatically improved. In this contribution, we describe how experiments based on electron beams can provide key information to neutrino experiments, benchmarking theoretical models, improving simulations needed for a reliable extraction of the neutrino oscillation parameters, and decisively contribute to the success of next-generation neutrino experiments.
Gamow-Teller excitations in the Subtracted Second RPA approach
Authors: Gambacurta Danilo 
Published: March 2023

Abstract
The charge-exchange subtracted second random-phase approximation, based on Skyrme functionals, is employed to investigate the Gamow-Teller resonances in several nuclei, located in different regions of the nuclear chart. The amount of Gamow-Teller strength is considerably smaller than in other energy-density-functional based calculations and agrees better with the experimental data. These important results, obtained without any ad hoc quenching factors, are due to the inclusion of two-particle–two-hole configurations. Their density progressively increases with excitation energy, leading to a long high-energy tail in the spectrum. This result may have implications for the computation of nuclear matrix elements for neutrinoless double-beta decay in the same framework.
Direct measurement of the 13C(α,n)16O reaction in the Gamow window of the s-process nucleosynthesis
Authors: Ciani G.F. , Formicola A. 
Published: March 2023

Abstract
One of the main neutron sources for the astrophysical s process is the 13C(α,n)16O reaction, which takes place in thermally pulsing asymptotic giant branch (TP-AGB) stars at environmental temperature around 90 MK. To model the nucleosynthesis process connected with the reaction, it is important to know with high accuracy the cross section reaction in the energy window 240-150 keV, the so called Gamow window. At these sub-Coulomb energies, direct cross section measurements are severely affected by the low event rate and low signal-to-noise ratio. In this work, a new study of the astrophysical S(E)-factor for the 13C(α,n)16O reaction is presented.
In the framework of the LUNA scientific programme, a direct measurement of the absolute cross section of the 13C(α,n)16O reaction in an energy window from 300 keV down to 230 keV, significantly closer to the Gamow peak, has been performed. Lower uncertainties with respect to literature values are obtained allowing to reduce overall uncertainties on reaction rates calculation. Selected stellar models have been computed to estimate the impact of our revised reaction rate. For stars of nearly solar composition, we find sizeable variations of some isotopes, whose production is influenced by the activation of close-by branching points that are sensitive to the neutron density, in particular 60Fe, 205Pb and and 152Gd.
A + 2n compound nuclei and the unitary limit in nuclear physics
Authors: Georgoudis P E 
Published: March 2023

Abstract
This contribution discusses a new perception of the structure of compound nuclei by introducing intermediate states of the Feshbach formalism of nuclear reactions in the Interacting Boson Model of nuclear structure. The stake is to explore the manifestation of the unitary limit in heavy, even-even nuclei. Interactions that govern Feshbach resonances of cold and dilute atomic gases suggest the formulation of an IBM-compound Hamiltonian for scattering two neutrons (2n) from a heavy, even-even target (A). The solutions of the corresponding coupled channel equations host a 2n-IBM state resonance. It turns out that the unitary limit is measurable in a heavy A + 2n compound nucleus at low temperatures. That measurement is feasible through the fluctuations of the cross-sections that tune the 2n-A scattering length.
Experimental Investigation on the Failure Behavior of Single-Stiffened Composite Panels under Compressive Load
Authors: Yu Fei , Zhang Ru , Chen Xiangming , Deng Fanchen , Wang Zhe , Yuan Fei , Cheng Liping , Lin Guowei , Li Xinxiang 
Published: March 2023

Abstract
Whilst the thin-walled composite structures have been widely used to build the primary components in aircraft, Low-Velocity Impact (LVI) can cause severe intra-laminar and inter-laminar damage in the composite material, reducing the mechanical performance of these components. This paper presents an experimental study on the compressive failure behavior of a Single Hat-Stiffener Panel (SHSP) with two typical flaws, i.e., impact-induced damage and skin/stiffener debonding. LVI tests were performed to introduce the damage around the radius edge of the stiffener and the center of the flat skin panel, respectively, while the skin/stiffener debonding was introduced to the SHSP by artificially embedding a PTFE film at the skin/stiffener interface during autoclave curing. The impact energy to cause Barely Visible Impact Damage (BVID) was determined to be 22 J for the thin SHSP configuration. Whilst the considerable damage area was detected by the ultrasonic scan for the thick SHSP at an energy level of 35 J, the impact-induced indentation was not visually detectable (<0.35 mm), indicating a high impact resistance of this thick SHSP. Compression After Impact (CAI) results showed a significant reduction (59.1%) in the ultimate compressive strength of the SHSP when the impact location was on the stiffener compared to the pristine specimen. However, this reduction is less significant (34.7%) when the damage resulted from the same impact energy in the flat skin panel. In this study, the presence of skin/stiffener debonding does not adversely influence the compressive strength of the thick SHSP, while this debonding flaw appears to cause a minor reduction in the compressive strength of the thin SHSP.
Model-based Operation Safety Assessment for Civil Aircraft
Authors: Ma Biao 
Published: March 2023

Abstract
With the operation of China’s large aircraft, operational safety has become an important issue. The manufacturer uses operation data and design data to carry out safety assessments in the operation phase. Operation safety assessment evaluates whether the conclusion of the safety assessment is still valid and analyzes the safety margin of the aircraft in the operating environment. Model-based civil aircraft operation safety assessment method uses the model-based ideology to propose a technical method of operating safety assessment based on the failure propagation model. The relevant practice also shows that this method is effective and can improve efficiency and accuracy.
Research Progress and Prospect of Satellite Constellation Optimization Design
Authors: Zhao Shuailong , Wang Yaru , Zhang Yasheng , Zheng Kaiyuan 
Published: March 2023

Abstract
Satellite constellation optimization has gradually developed from simple single-objective optimization to complex multi-objective optimization. Among them, the high-dimensional and multi-objective dynamic optimization problem poses a great challenge to the performance of the algorithm. To improve convergence speed and optimization performance, researchers continue to improve modern optimization algorithms. Firstly, the construction process of the optimization model is reviewed. The model takes the coverage performance, network performance, and system cost as objective functions or constraints. Secondly, the general forms of multi-objective constellation optimization design models under various constraints are given, and the applications of modern optimization algorithms such as genetic algorithm (GA), non-dominated sorting genetic algorithm (NSGA-2), multi-objective particle swarm optimization algorithm (MOPSO), differential evolution algorithm (DE) in different constellation design tasks, as well as their characteristics and development trends are introduced. Finally, it is pointed out that in the era of vigorous development of Leo mega-constellations, the combination of modern optimization algorithms and machine learning is the future research direction to solve high-dimensional and multi-objective dynamic optimization problems.
Investigation of Mixing Characteristics of the Transverse Jet in a Supersonic Combustor at Low Mach Inflow Condition
Authors: Wang Yi , Zhang Lin , Liang Jianhan 
Published: March 2023

Abstract
LES is used in the present work to simulate and unfold unsteady flow dynamics and mixing characteristics in a cavity-based supersonic combustor at low Mach numbers. In the combustor, a transverse jet is injected ahead of the cavity. Two inflow Mach numbers (Ma=1.2 and Ma=2.5) are numerically investigated. Fine instantaneous and average mixing flow structures are well identified and analyzed by LES. The mixing performance is also studied and compared. The simulation results show that penetration is dominated by jet/freestream momentum flux ratio, even though the inflow Mach number varies. It is also demonstrated that for a jet at low Mach inflow, a higher coefficient of pressure is attained. While around the jet location, a much higher peak of the mixing vorticity efficiency is obtained for low Mach inflow, which is of fundamental importance to the near-field mixing.