bluuebunny/crossref_metadata_2025_split huggingface dataset:
Disks in close binary stars
Authors: Jordan Lucas M. , Kley Wilhelm , Picogna Giovanni , Marzari Francesco 
Published: August 2021

Context. Close binaries (abin ≤ 20 au) are known to harbor planets, yet planet formation is unlikely to succeed in such systems. Studying the dynamics of disks in close binaries can help to understand how those planets could have formed.
Aims. We study the impact that numerical and physical parameters have on the dynamics of disks in close binaries. We use the γ-Cephei system as an example and focus on disk quantities such as disk eccentricity and the precession rate as indicators for the dynamical state of the disks.
Methods. We simulate disks in close binaries by performing two-dimensional radiative hydrodynamical simulations using a modified version of the FARGO code. First, we perform a parameter study for different numerical parameters to confirm that our results are robust. In the second part, we study the effects of different masses and different viscosities on the disks’ dynamics.
Results. Previous studies on radiative disks in close binaries used too low resolutions and too small simulation domains, which impacted the disk’s dynamics. We find that radiative disks in close binaries, after an initialization phase, become eccentric with mean eccentricities between 0.06 and 0.27 and display a slow retrograde precession with periods ranging from 4−40Tbin which depends quadratically on the disk’s mean aspect ratio. In general, the disks show a coherent, rigid precession which can be broken, however, by changes in the opacity law reducing the overall eccentricity of the disk.
Free Flap Reconstruction of Extremity Defects in Pediatric Patients
Authors: Li Jin , Xiong Hewei , Li Gongchi , Zhou Pan , Ai Fangxin , Wang Kun , Chen Jianghai 
Published: August 2021

Abstract
Background Microsurgical reconstruction of extremity defects with free flaps has been carried out for many years. The aim of this retrospective study is to characterize free flap surgery on children of 1 to 7 years old by evaluating a series of 20 cases of free flap surgeries that have been performed in pediatric patients.
Methods From February 2014 to January 2018, 20 patients, 10 boys and 10 girls aged from 1 to 7 years (average, 4.6 years), were engaged in this study. Several types of free flaps were used, including anterolateral thigh flaps (ALT), inferior ulnar collateral artery flap, latissimus dorsi flap, medial plantar flap, fibular osteocutaneous flap and hallux toenail flap. After operations, follow-up period was at least for 2 years and the average follow-up period was 48.5 months. The long-term outcomes were estimated by questionnaires derived from the American Academy of Orthopaedic Surgeons Pediatric Outcomes Data Collection Instrument (PODCI).
Results A total of 21free-flap reconstructions were performed on 20patients, including 15 ALT, 3 composite flaps, and 3 other cutaneous flaps. The size of the tissue flap ranged from 1.5 to 280 cm2 (average, 74.1cm2). The diameter of the anastomosed artery of the flap ranged from 0.7 to 1.2 mm. Among the 21 flaps, 20 survived and the success rate was about 95 %. Contour adaption was achieved in all flaps. Fifteen children received a secondary operation for debulking or functional improvement. Secondary deformity was present in 3 children, among which ankle joint valgus was seen in two children and a flexion deformity of injured toe occurred in one child. The mean global functioning score of PODCI was 94 (ranging from 81 to 98, maximum 100).
Conclusion The success rate of free-flap surgery in pediatric patients was comparable to that achieved in adults. Post-operative caring for pediatric patients was easier than expected. For pediatric patients, the final outcomes were not varied remarkably from different types of free tissue transfer.
The Ice Chamber for Astrophysics–Astrochemistry (ICA): A new experimental facility for ion impact studies of astrophysical ice analogs
Authors: Herczku Péter , Mifsud Duncan V. , Ioppolo Sergio , Juhász Zoltán , Kaňuchová Zuzana , Kovács Sándor T. S. , Traspas Muiña Alejandra , Hailey Perry A. , Rajta István , Vajda István , Mason Nigel J. , McCullough Robert W. , Paripás Béla , Sulik Béla 
Published: August 2021

The Ice Chamber for Astrophysics–Astrochemistry (ICA) is a new laboratory end station located at the Institute for Nuclear Research (Atomki) in Debrecen, Hungary. The ICA has been specifically designed for the study of the physico-chemical properties of astrophysical ice analogs and their chemical evolution when subjected to ionizing radiation and thermal processing. The ICA is an ultra-high-vacuum compatible chamber containing a series of IR-transparent substrates mounted on a copper holder connected to a closed-cycle cryostat capable of being cooled down to 20 K, itself mounted on a 360° rotation stage and a z-linear manipulator. Ices are deposited onto the substrates via background deposition of dosed gases. The ice structure and chemical composition are monitored by means of FTIR absorbance spectroscopy in transmission mode, although the use of reflectance mode is possible by using metallic substrates. Pre-prepared ices may be processed in a variety of ways. A 2 MV Tandetron accelerator is capable of delivering a wide variety of high-energy ions into the ICA, which simulates ice processing by cosmic rays, solar wind, or magnetospheric ions. The ICA is also equipped with an electron gun that may be used for electron impact radiolysis of ices. Thermal processing of both deposited and processed ices may be monitored by means of both FTIR spectroscopy and quadrupole mass spectrometry. In this paper, we provide a detailed description of the ICA setup as well as an overview of the preliminary results obtained and future plans.
Cooperatives and the reorganisation of labour-intensive production in South Africa’s clothing industry
Authors: Nattrass Nicoli , Seekings Jeremy 
Published: August 2021

ABSTRACT
Wage regulation in South Africa’s clothing industry has pushed low-wage producers to restructure themselves as partnerships between former employers, now intermediaries, and worker cooperatives. The proliferation of employer-initiated cooperatives in the clothing sector reflects and poses challenges to South Africa’s system of industrial-level bargaining, to unionisation, and to the government’s unevenly implemented strategy of using minimum wages to force enterprises to ‘upgrade’ and become less labour intensive. Through circumventing wage regulation and institutionalising a less adversarial approach to the management of labour, worker cooperatives represent a model for low-wage labour-intensive manufacturing that disrupts government rhetoric and policymaking.
Effects of FFP2/N95 face mask on low‐ and high‐load resistance exercise performance in recreational weight lifters
Authors: Rosa Bruno Viana , Rossi Fabrício Eduardo , de Moura Helton Pereira dos Santos Nunes , Santos Arilene Maria da Silva , Véras‐Silva Acácio Salvador , Ribeiro Sérgio Luís Galan , Nakamura Fabio Yuzo , Pereira dos Santos Marcos Antonio 
Published: August 2021

ABSTRACTThe objective of this study was to verify the acute effects of an FFP2/N95 face mask on moderate‐ and high‐load resistance exercise performance in recreational weight lifters. Seventeen recreational weight lifters performed four randomized bouts: high intensity [70% of one maximum repetition (1RM)] and moderate intensity (50% 1RM), both with and without an FFP2/N95 face mask. All sequences of exercises were performed over four sets in the bench press exercise, performed on a Smith machine until movement failure, with two minutes of recovery between sets. A linear position transducer was used to measure the bar velocity, and record the mean propulsive velocity (MPV) and maximum propulsive velocity (V max). The rate of perceived effort (RPE), heart rate (HR), blood pressure, and oxygen saturation (SpO2) were recorded. For the high‐intensity condition, MPV (p = 0.021) and V max (p = 0.004) were significantly lower in the mask condition compared to non‐mask in set‐1, however, there were no significant differences for moderate intensity or for total volume in either intensity (p > 0.05). There was a significant difference between conditions, with lower SpO2 (p = 0.010) and higher RPE (p = 0.008) when wearing the face mask only at the moderate intensity. In conclusion, the FFP2/N95 face mask impacted performance in the high‐intensity resistance bench press exercise until movement failure but decreased oxygen saturation and increased rate of perceived effort only in the moderate‐intensity exercise in recreational weight lifters.
COVID‐19 pandemic, has led to several countries adopting the use of masks in public spaces. Mask used during physical exercise it may induce early fatigue. However, despite the results with aerobic exercise, as far as we know, no studies have been carried out on wearing a mask during resistance exercise.
This randomized, crossover study verified the acute effect of an FFP2/N95 face mask on moderate‐ and high‐load upper body resistance exercise performance in recreational weight lifters.
The FFP2/N95 face mask impacted performance, evaluated with bar velocity, in the high‐intensity resistance bench press exercise until movement failure but decreased oxygen saturation and increased rate of perceived effort only in the moderate‐intensity exercise.
The genetic predisposition to obesity has no influence on waist circumference when screen time and sleep duration are adequate in children and adolescents
Authors: Brand Caroline , Sehn Ana Paula , Todendi Pâmela Ferreira , de Moura Valim Andreia Rosane , Mattevi Vanessa Suñé , García‐Hermoso Antônio , Reis Gaya Anelise , Reuter Cézane Priscila 
Published: August 2021

ABSTRACTThe aim of the present study was to verify whether the amount of sleep duration, screen time, and physical activity moderate the relationship between FTO rs9939609 polymorphism and waist circumference (WC) in children and adolescents. This is a cross‐sectional study conducted with 1338 children and adolescents, aged between 6 and 17 years. Lifestyle habits were assessed through self‐reported questionnaire. WC was measured on the narrowest part of the trunk between the last rib and the iliac crest. FTO rs9939609 polymorphism was genotyped by real time polymerase chain reaction. The PROCESS macro for the SPSS was used for moderation analyses, through multiple linear regression models. Results indicated significant interactions were found between sleep duration and screen time X FTO rs9939609, showing that these lifestyle behaviours are moderators in the relationship between a genetic predisposition for obesity and higher WC. For physical activity, there was no significant interaction. Therefore, sleeping more than 564 min a day (i.e. 9.4 h) and spending no more than 233 min in front of screen may counteract the genetic predisposition to obesity in children and adolescents.Highlights
A healthy lifestyle may counteract the genetic predisposition to central obesity;
Children and adolescents should sleep more than approximately 9 h (564 min) per day and spend less than approximately 4 h (233 min) per day in front of screens in order to counteract the genetic predisposition to central obesity conferred by the FTO gene variant.
It is fundamental to promote actions for the adoption of a healthy lifestyle, including the importance of presenting adequate sleep habits and low screen time for a better cardiometabolic health and reduction of obesity.
International comparison of activity measurements of radon 222 - EURAMET Project n°1475 - EURAMET.RI(II)-S8.Rn-222
Authors: Pierre S , Cassette P , Sabot B , Fréchou C , Antohe A , Barna C , Blahušiak P , Cardellini F , Dersch R , Honig A , Juget F , Krivošík M , Luca A , Maringer F J , Mertes F , Röttger S , Sahagia M , Slučiak J , Stietka M , Szűcs L , Teodorescu C 
Published: August 2021

Main text
An international comparison of activity per unit volume of 222Rn (EURAMET project N° 1475, registered in KCDB as supplementary comparison EURAMET.RI(II)-S8.Rn-222) was organised in 2019 within the framework of the European project MetroRADON. The LNE-LNHB is the pilot of the comparison. Samples of 222Rn gas provided by the LNE-LNHB were sent to the participants and were measured using various techniques. The reference value is the power moderated mean (PMM) (Pommé, 2013) of the seven submitted results.
To reach the main text of this paper, click on Final Report. Note that this text is that which appears in Appendix B of the BIPM key comparison database https://www.bipm.org/kcdb/.
The final report has been peer-reviewed and approved for publication by the CCRI, according to the provisions of the CIPM Mutual Recognition Arrangement (CIPM MRA).
Newtonian-noise characterization at Terziet in Limburg—the Euregio Meuse–Rhine candidate site for Einstein Telescope
Authors: Bader Maria , Koley Soumen , van den Brand Jo , Campman Xander , Bulten Henk Jan , Linde Frank , Vink Bjorn 
Published: August 2021

Abstract
Limburg, in the border region between Belgium, Germany and the Netherlands, has been identified as the Euregio Meuse–Rhine candidate site for Einstein Telescope. The site hosting this gravitational-wave observatory must minimize the Newtonian coupling of ground vibrations to the core optics of the low-frequency detectors. Newtonian noise depends on the ambient seismic field which is in turn dependent on the site’s geology and the distribution of surface and underground seismic-noise sources. We have characterized the site near Terziet in Limburg in terms of propagation modes, dispersion and angular distribution of seismic noise by employing sensor arrays on the surface. Attenuation of seismic noise with depth was studied with a borehole sensor. Based on the results of these measurements, a realistic seismic-field model has been derived that represents a complete solution of the elastodynamic wave equations for a horizontally-layered soil structure. This seismic-field model allows to estimate the Newtonian-noise contribution to the sensitivity of Einstein Telescope for the characteristic geology and ambient noise conditions in South Limburg. The site’s geology features soft-soil layers on hard-rock and is effective in attenuating Newtonian noise from surface waves below the required sensitivity. A random background of body waves with all possible angles of incidence is expected to constitute the dominant source of Newtonian noise.
A morphing wing with cellular structure of non-uniform density
Authors: Zhang Haibo , Zhang Zhenkai , Song Chen , Yang Chao 
Published: August 2021

Abstract
This paper proposes an optimization design method for the modular cellular structure of non-uniform density, which is filled into the morphing wing to generate variable torsion angle. By actively adjusting the distribution of the span-wise torsion angle, the lift distribution on the wing surface can be properly adjusted to avoid the problem of aeroelastic divergence or reduce the bending moment at the wing root. This ability is validated using CFD simulation. In the optimization framework proposed, the adaptive gradient algorithm is used to suppress the divergence of iteration. A finite element model with geometrical nonlinear effects is then proposed to correct the errors of the linear analysis and verify the effectiveness of the optimization method. This design is shown to be able to reduce the overall weight of the structure and achieve control of the macro mechanical performance of the wing. The work provides a general optimization design method for similar modular structures, allowing independent programmable adjustment of the parameters of each single structural cell.
Aspects of symmetry and topology in the charge density wave phase of 1T–TiSe2
Authors: Huang Shin-Ming , Xu Su-Yang , Singh Bahadur , Hsu Ming-Chien , Hsu Chuang-Han , Su Chenliang , Bansil Arun , Lin Hsin 
Published: August 2021

Abstract
The charge density wave (CDW) in 1T–TiSe2 harbors a nontrivial symmetry configuration. It is important to understand this underlying symmetry both for gaining a handle on the mechanism of CDW formation and for probing the CDW experimentally. Here, based on first-principles computations within the framework of the density functional theory, we unravel the connection between the symmetries of the normal and CDW states and the electronic structure of 1T–TiSe2. Our analysis highlights the key role of irreducible representations of the electronic states and the occurrence of band gaps in the system in driving the CDW. By showing how symmetry-related topology can be obtained directly from the electronic structure, our study provides a practical pathway in search of topological CDW insulators.
From local to nonlocal: higher fidelity simulations of photon emission in intense laser pulses
Authors: Blackburn T G , MacLeod A J , King B. 
Published: August 2021

Abstract
State-of-the-art numerical simulations of quantum electrodynamical (QED) processes in strong laser fields rely on a semiclassical combination of classical equations of motion and QED rates, which are calculated in the locally constant field approximation. However, the latter approximation is unreliable if the amplitude of the fields, a
0, is comparable to unity. Furthermore, it cannot, by definition, capture interference effects that give rise to harmonic structure. Here we present an alternative numerical approach, which resolves these two issues by combining cycle-averaged equations of motion and QED rates calculated in the locally monochromatic approximation. We demonstrate that it significantly improves the accuracy of simulations of photon emission across the full range of photon energies and laser intensities, in plane-wave, chirped and focused background fields.
On Tri-ĝ Continuous Functions In Tri-Topological Spaces
Authors: Bala Deepa Arasi K. , Jeyasudha L. , Maheswari V. 
Published: August 2021

Abstract
In this paper, we introduce a new function called tri-ĝ continuous in tri-topological spaces. A map f : X → Y is called tri-ĝ continuous if f-1(V) is tri-ĝ closed in X for each tri-closed set V in Y. Also we define, quasi tri-ĝ. perfectly tri-ĝ, contra tri-ĝ, totally tri-ĝ and strongly tri-ĝ continuous maps are introduced and some of their properties are studied.
Current status of different detector technology in the searches of dark matter events
Authors: Karmakar S. , Singh M. K. , Singh V. 
Published: August 2021

Abstract
In this article, we review the possible candidates of dark matter and their proposed properties. We have focused on different methods used for the detection of the dark matter candidates such as, search of WIMPs at the accelerators, indirect and direct detection of WIMPs. We have highlighted the different detector technologies such as, charge collection after ionization, bubble formation in superheated liquid by charge particle, scintillation produced due to the incident radiation, cryogenic detection technique, noble liquid as detector material, time projection chamber, which are used by different experimental collaborations worldwide.
A New Set of Soft Generalized*β-Locally Closed Sets in Soft Topological Spaces
Authors: Punitha Tharani A , Sujitha H 
Published: August 2021

Abstract
We present a new set of soft generalized* β-locally closed set (here
after
mentioned
as, g
∗
β

s
-lc), soft
g
∗
β − lc
∗set (here
after
mentioned
as, g
∗
β

s
− lc
∗), soft
g
∗
β − lc
∗∗ (here
after
mentioned
as, g
∗
β

s
− lc
∗∗) sets in STS. Further to the above, the relation between the other notions connected with the forms of soft − lc sets and some properties are studied.
Dominating Function in Fractional Graph
Authors: Karunambigai M. G. , Sathishkumar A. 
Published: August 2021

Abstract
Definition of dominating function on a fractional graph G has been introduced. Fractional parameters such as domination number and upper domination number of a fractional graph G has been defined. Domination number and upper domination number of a fractional graph with fuzzy and Intuitionistic fuzzy environment, have been found by formulating Linear Programming Problem.
Dual Simplex Method Based solution for a Fuzzy Transportation Problem
Authors: Sangeetha V. , Thirisangu K. , Elumalai P. 
Published: August 2021

Abstract
This article focuses on solving the fuzzy transportation problem using the dual approach of the simplex. This method uses a strong ranking technique for the iterative values of the trapezoidal fuzzy numbers within the fuzzy transportation problem. Because of approach, the fuzzy transportation problem (in which cost, demand, and supply appear as trapezoidal fuzzy numbers) is transformed into a crisp valued transportation problem. LPP (Linear Programming Problem) and employed dual simplex procedure for solving. The earlier task of obtaining the optimal solution through the IBFS technique and therefore the fuzzy MODI method is reduced here and the optimal solution is obtained directly by the dual simplex procedure.
Fuzzy Binary Soft Separation Axioms and its Properties
Authors: Gino Metilda P. , Subhashini J. 
Published: August 2021

Abstract
In this paper we introduce fuzzy binary soft separation axioms in fuzzy binary soft topological spaces over the two universal sets U1 and U2. We define fuzzy binary soft Ti axioms (i = 0, 1, 2), and study fundamental properties such as fuzzy binary soft hereditary of the above mentioned spaces in detailed.
Forcing Total Outer Independent Edge Geodetic Number of a Graph
Authors: Arul Paul Sudhahar P. , Ajin Deepa A. 
Published: August 2021

Abstract
In this paper we learn the new idea of forcing total outer independent edge geodetic number of a graph. Let G be a connected graph and R be a minimum total outer independent edge geodetic set of G. A subset L ⊆ R is known as a forcing subset for R if R is the unique minimum total outer independent edge geodetic set containing L. A forcing subset for R of minimum cardinality is a minimum forcing subset of R. The forcing total outer independent edge geodetic number of G denoted by

f

1
t

o
i

(G) is

f

1
t

o
i

(G) = min

{

f

1
t

o
i

(
R
)
}

, where the minimum is taken over all minimum total outer independent edge geodetic set R in G. Some general properties satisfied by this concept are studied. It is shown that for any couple of integers l, m with0 < l ≤ m − 4, there exists a connected graph G such that

f

1
t

o
i

(
G
)
=
l

and

g

1
t

o
i

(
G
)
=
m

.
Split Edge Geodetic Domination Number of a Graph
Authors: Arul Paul Sudhahar P. , Jeba Lisa J. 
Published: August 2021

Abstract
In this paper, we introduce a new graph theoretic parameter, split edge geodetic domination number of a connected graph as follows. A set S ⊆ V(G) is said to be a split edge geodetic dominating set of G if S is both a split edge geodetic set and a dominating set of G ( < V-S > is disconnected). The minimum cardinality of the split edge geodetic dominating set of G is called split edge geodetic domination number of G and is denoted by γ
1g
s
(G). It is shown that for any 3 positive integers m, f and nwith 2 ≤ m ≤ f ≤ n-2, there exists a connected graph G of order n such that g
1 (G) = m and γ
1g
s
(G) = f. For every pair l, n of integers with 2 ≤ l ≤ n-2, there exists a connected graph G of order n such that γ
1g
s
(G) = l.
k-Split andk-Non Split Domination of some Zero-Divisor Graphs and its ϑ-Obrazom
Authors: Ragha S. , Rajeswari R. , Meenakumari N. 
Published: August 2021

Abstract
The concept of split domination number was introduced by Kulli and Janakiram. Fink and Jacobson introduced the notion of k-domination in graphs. In this paper, we acquaint with the concept of k-split and k-non split domination for some zero-divisor graphs and ϑ-Obrazom for zero-divisor graphs.