bluuebunny/crossref_metadata_2025_split huggingface dataset:
Mapping Trends and Hotspots Regarding Clinical Research on COVID-19: A Bibliometric Analysis of Global Research
Authors: Xia Demeng , Yao Renqi , Wang Sheng , Chen Gaoqi , Wang Yin 
Published: August 2021

Purpose: The coronavirus disease 2019 (COVID-19) outbreak, which began in December 2019, has not been completely controlled; therefore, COVID-19 has received much attention from countries around the world. Many related clinical studies, such as clinical trials, have been published, but to the knowledge of the authors, there has been no bibliometric analysis of these publications focusing on clinical research studies on COVID-19.Methods: Global publications on COVID-19 from January 2020 to December 2020 were extracted from the Web of Science (WOS) collection database. The VOSviewer software and CiteSpace were employed to perform a bibliometric study. In addition, we obtained information on relevant clinical trials from the website http://clinicaltrials.gov.Results: China published most of the articles in this field and had the highest number of citations and H-index. The Journal of Medical Virology published most of the articles related to COVID-19. In terms of institutions, Huazhong University of Science and Technology had the most publications, and Wang, JW received the highest number of citations.Conclusion: The diagnosis, prevention, and prognosis of COVID-19 are still the focus of attention at present. The overall analysis of the disease were identified as the emerging topics from the perspectives of epidemiology and statistics. However, finding an effective treatment remains the focus of clinical trials.
Computational Investigation of the Combined Impact of Nonlinear Radiation and Magnetic Field on Three-Dimensional Rotational Nanofluid Flow across a Stretchy Surface
Authors: Hussain Azad , Elkotb Mohamed Abdelghany , Arshad Mubashar , Rehman Aysha , Sooppy Nisar Kottakkaran , Hassan Ali , Saleel C. Ahamed 
Published: August 2021

This comparative study inspects the MHD three-dimensional revolving flow and temperature transmission of a radiative stretching surface. The flow of nanofluid is modeled using the Tiwari and Das model. Water is the base fluid, and the nanoparticles are composed of two different types of nanoparticle, i.e., gold and silver (Au and Ag). The non-radiative heat flow notion is examined in a temperature field that results in a nonlinear energy equation. Conformist transformations are used to generate a self-similar arrangement of the leading differential system. The resulting system has an intriguing temperature ratio constraint, which shows whether the flow has a little or significant temperature differential. By using a powerful mathematical technique, numerical results are obtained. The solutions are influenced by both stretching and rotation. The difference in velocity constituents with the elements’ volume fraction is non-monotonic. Results for the rotating nanofluid flow and heat transfer properties for both types of nanoparticles are highlighted with graphs. The impact of physical concentrations, such as heat flux rates and skin friction constants, are examined at the linear extending surface and clarified graphically. Ag-water nanofluid has a high-temperature transfer constant compared to Au-water nanofluid. The velocity profile was also discovered to have a parabolic distribution shape.
Enhancement of ethanol production and cell growth in budding yeast by direct irradiation of low-temperature plasma
Authors: Tanaka Hiromasa , Matsumura Shogo , Ishikawa Kenji , Hashizume Hiroshi , Ito Masafumi , Nakamura Kae , Kajiyama Hiroaki , Kikkawa Fumitaka , Ito Mikako , Ohno Kinji , Okazaki Yasumasa , Toyokuni Shinya , Mizuno Masaaki , Hori Masaru 
Published: August 2021

Abstract
Ethanol production by budding yeast was compared between direct and indirect plasma irradiation. We observed enhancement of ethanol production and cell growth not by indirect plasma irradiation but by direct plasma irradiation. Glucose consumption was increased in budding yeast by direct plasma irradiation. Extracellular flux analysis revealed that glycolytic activity in the budding yeast was elevated by direct plasma irradiation. These results suggest that direct plasma irradiation enhances ethanol production in budding yeast by elevating the glycolytic activity.
Physical Characterization of Serendipitously Uncovered Millimeter-wave Line-emitting Galaxies at z ∼ 2.5 behind the Local Luminous Infrared Galaxy VV 114
Authors: Mizukoshi Shoichiro , Kohno Kotaro , Egusa Fumi , Hatsukade Bunyo , Minezaki Takeo , Saito Toshiki , Tamura Yoichi , Iono Daisuke , Ueda Junko , Matsuda Yuichi , Kawabe Ryohei , Lee Minju M. , Yun Min S. , Espada Daniel 
Published: August 2021

Abstract
We present a detailed investigation of millimeter-wave line emitters ALMA J010748.3-173028 (ALMA-J0107a) and ALMA J010747.0-173010 (ALMA-J0107b), which were serendipitously uncovered in the background of the nearby galaxy VV 114 with spectral scan observations at λ = 2–3 mm. Via Atacama Large Millimeter/submillimeter Array (ALMA) detection of CO(4–3), CO(3–2), and [C i](1–0) lines for both sources, their spectroscopic redshifts are unambiguously determined to be z = 2.4666 ± 0.0002 and z = 2.3100 ± 0.0002, respectively. We obtain the apparent molecular gas masses M
gas of these two line emitters from [C i] line fluxes as (11.2 ± 3.1) × 1010
M
⊙ and (4.2 ± 1.2) × 1010
M
⊙, respectively. The observed CO(4–3) velocity field of ALMA-J0107a exhibits a clear velocity gradient across the CO disk, and we find that ALMA-J0107a is characterized by an inclined rotating disk with a significant turbulence, that is, a deprojected maximum rotation velocity to velocity dispersion ratio

v

max

/

σ

v

of 1.3 ± 0.3. We find that the dynamical mass of ALMA-J0107a within the CO-emitting disk computed from the derived kinetic parameters, (1.1 ± 0.2) × 1010
M
⊙, is an order of magnitude smaller than the molecular gas mass derived from dust continuum emission, (3.2 ± 1.6) × 1011
M
⊙. We suggest this source is magnified by a gravitational lens with a magnification of μ ≳ 10, which is consistent with the measured offset from the empirical correlation between CO-line luminosity and width.
TIC 454140642: A Compact, Coplanar, Quadruple-lined Quadruple Star System Consisting of Two Eclipsing Binaries
Authors: Kostov Veselin B. , Powell Brian P. , Torres Guillermo , Borkovits Tamás , Rappaport Saul A. , Tokovinin Andrei , Zasche Petr , Anderson David , Barclay Thomas , Berlind Perry , Brown Peyton , Calkins Michael L. , Collins Karen A. , Collins Kevin I. , Conti Dennis M. , Esquerdo Gilbert A. , Hellier Coel , Jensen Eric L. N. , Kamler Jacob , Kruse Ethan , Latham David W. , Mašek Martin , Murgas Felipe , Olmschenk Greg , Orosz Jerome A. , Pál András , Palle Enric , Schwarz Richard P. , Stockdale Chris , Tamayo Daniel , Uhlař Robert , Welsh William F. , West Richard 
Published: August 2021

Abstract
We report the discovery of a compact, coplanar, quadruple-lined, eclipsing quadruple star system from Transiting Exoplanet Survey Satellite data, TIC 454140642, also known as TYC 0074-01254-1. The target was first detected in Sector 5 with a 30-minute cadence in full-frame images and then observed in Sector 32 with a 2-minute cadence. The light curve exhibits two sets of primary and secondary eclipses with periods of P

A
= 13.624 days (binary A) and P

B
= 10.393 days (binary B). Analysis of archival and follow-up data shows clear eclipse-timing variations and divergent radial velocities, indicating dynamical interactions between the two binaries and confirming that they form a gravitationally bound quadruple system with a 2 + 2 hierarchy. The Aa+Ab binary, Ba+Bb binary, and A-B system are aligned with respect to each other within a fraction of a degree: the respective mutual orbital inclinations are 0.°25 (A versus B), 0.°37 (A versus A-B), and 0.°47 (B versus A-B). The A-B system has an orbital period of 432 days—the second shortest of the confirmed quadruple systems—and an orbital eccentricity of 0.3.
The Diversity of Environments around Luminous Quasars at Redshift z ∼ 6
Authors: Ren Keven , Trenti Michele , Marshall Madeline A. , Di Matteo Tiziana , Ni Yueying 
Published: August 2021

Abstract
Significant clustering around the rarest luminous quasars is a feature predicted by dark matter theory combined with number density matching arguments. However, this expectation is not reflected by observations of quasars residing in a diverse range of environments. Here we assess the tension in the diverse clustering of visible i-band dropout galaxies around luminous z ∼ 6 quasars. Our approach uses a simple empirical method to derive the median luminosity–to–halo mass relation, L

c
(M

h
), for both quasars and galaxies under the assumption of lognormal luminosity scatter, Σ
Q
and Σ
G
. We show that higher Σ
Q
reduces the average halo mass hosting a quasar of a given luminosity, thus introducing at least a partial reversion to the mean in the number count distribution of nearby Lyman-break galaxies. We generate a large sample of mock Hubble Space Telescope fields of view centered across rare z ∼ 6 quasars by resampling pencil beams traced through the dark matter component of the BlueTides cosmological simulation. We find that diverse quasar environments are expected for Σ
Q
> 0.4, consistent with numerous observations and theoretical studies. However, we note that the average number of galaxies around the central quasar is primarily driven by galaxy evolutionary processes in neighboring halos, as embodied by our parameter Σ
G
, instead of a difference in the large-scale structure around the central quasar host, embodied by Σ
Q
. We conclude that models with Σ
G
> 0.3 are consistent with current observational constraints on high-z quasars, and that such a value is comparable to the scatter estimated from hydrodynamical simulations of galaxy formation.
4G Network Security Algorithms: Overview
Authors: M. Zaki Rana , Bahjat Abdul wahab Hala 
Published: August 2021

<p class="0abstractCxSpFirst">Long Term Evolution (LTE) of (Universal Mobile Telecommunication System) is one of the modern steps in series of mobile telecommunications systems. That appears to be a strong technology that meets the requirements of fourth-generation (4G) mobile networks and supports authentication and encryption mechanisms between User Equipment (UE) and Message Management Entity (MME). This paper provides an overview of the three most important algorithms that are considered the heart of LTE cryptographic algorithms (SNOW3G, AES, and ZUC) and a comparison between cipher key length and initial vector length to generate keystream depending on the structure used for each algorithm as each algorithm has a time of complexity and space of complexity that differs from the other security algorithm.</p><p class="0abstractCxSpLast"><strong> </strong></p>
The Longitudinal Impact of Standardized Patient Encounters During Professional Education on Athletic Training Professional Practice
Authors: Armstrong Kirk J. , Jarriel Amanda J. , Hardin Brittney M. 
Published: August 2021

Context
Inquiry into the use of standardized patients (SPs) is growing in athletic training education; however, the impact of these SP encounters has not been examined beyond professional education.

Objective
To understand how SP encounters during professional education benefited clinicians in their current clinical practice and in their transition to practice.

Design
Consensual qualitative research.

Setting
Individual phone interviews.

Patients or Other Participants
Thirteen professionals (7 women, 6 men; mean age = 28.15 ± 6.04 years) with postprofessional experience averaging 3.5 years (3.69 ± 1.43 years) participated in this study. Participant practice settings included college/university (4), high school (7), outpatient clinic (1), and military (1). Interviews were conducted until data saturation occurred.

Main Outcome Measure(s)
Data were collected via semistructured interviews, which were recorded and transcribed verbatim. Using a consensual qualitative research design, data were independently analyzed by a 3-person team, who independently coded the data and compared ideas until consensus was reached. Trustworthiness was established through member checks.

Results
Two themes emerged from the findings that described the participants' perceptions of how they felt using SPs in the ATP facilitated their growth as a health care professional: (1) personal growth/development and (2) professional growth/development. Participants specifically noted that these encounters enhanced confidence, critical thinking, interpersonal communication, and patient rapport and aided in transition to practice.

Conclusions
Athletic training professionals who experienced SPs during professional education revealed an increase in perceived confidence in clinical and interpersonal skills as they transitioned to independent practice. Additionally, participants highlighted that SP encounters should continue throughout the athletic training curriculum. Future research should involve participants from postbaccalaureate programs, as well as postprofessional and residency programs.
CHEMICAL WEED CONTROL RECOMMENDATIONS FOR WHEAT
Authors: Fırat PALA  , Husrev MENNAN  
Published: August 2021

A field study was conducted to evaluate the compatibility of herbicide tank mixtures in winter wheat (Triticum aestivum L.) Sagittario cv. in 2017-2019. Weed Index (VI) and Crop Injury (CI) of three mixtures prominent was recorded with mesosulfuron-methyl plus 2.4-D ethylhexyl ester + florasulam (5.8% and 1.5%) followed by pyroxsulam + florasulam + cloquintocet-mexyl plus 2.4-D dimethylamine salt (6.3% and 1.6%), and mesosulfuron-methyl + iodosulfuron-methyl-sodium plus bromoxynil + MCPA (7.1% and 0.0%), respectively. Weed Control Efficiency (WCE) was maximum with mesosulfuron-methyl + mefenpyr-diethyl plus 2.4-D ethylhexyl ester + florasulam so, Cirsium arvense (90%) heavily damaged; Avena fatua (98%), Avena sterilis (94%), and Papaver rhoeas (96%), Sinapis arvensis (95%) very heavy damaged (severe chlorosis and/or dead leaves); Galium aparine, Phalaris brachystachys, and Ranunculus arvensis were completely killed (100%, dead). Consequently, mesosulfuron-methyl + mefenpyr-diethyl plus 2.4-D ethylhexyl ester + florasulam herbicide mixture is recommended to provide weed control efficiency and wheat production safely. The compatibility of herbicides is necessary for sustainable weed management as it leads to reduced input costs, to prevent economic losses and to less pollution of the ecological environment. In addition, the conditions may require that the herbicides be applied with fungicides, insecticides or foliar fertilizers, and growers wish to know the safety of these mixtures. Therefore, studies on the compatibility of chemicals used in agriculture were considered to be needed.
On the Cartesian product of of an arbitrarily partitionable graph and a traceable graph
Authors: Baudon Olivier , Bensmail Julien , Kalinowski Rafał , Marczyk Antoni , Przybyło Jakub , Wozniak Mariusz 
Published: August 2021

Graph Theory
A graph G of order n is called arbitrarily partitionable (AP, for short) if, for every sequence τ=(n1,\textellipsis,nk) of positive integers that sum up to n, there exists a partition (V1,\textellipsis,Vk) of the vertex set V(G) such that each set Vi induces a connected subgraph of order ni. A graph G is called AP+1 if, given a vertex u∈V(G) and an index q∈ &#x007b;1,\textellipsis,k&#x007d;, such a partition exists with u∈Vq. We consider the Cartesian product of AP graphs. We prove that if G is AP+1 and H is traceable, then the Cartesian product G□ H is AP+1. We also prove that G□H is AP, whenever G and H are AP and the order of one of them is not greater than four.
Efficient open domination in graph products
Authors: Kuziak Dorota , Peterin Iztok , Yero Ismael Gonzalez 
Published: August 2021

Graph Theory
A graph G is an efficient open domination graph if there exists a subset D of V(G) for which the open neighborhoods centered in vertices of D form a partition of V(G). We completely describe efficient open domination graphs among lexicographic, strong, and disjunctive products of graphs. For the Cartesian product we give a characterization when one factor is K2.
Cell-paths in mono- and bichromatic line arrangements in the plane
Authors: Aichholzer Oswin , Cardinal Jean , Hackl Thomas , Hurtado Ferran , Korman Matias , Pilz Alexander , Silveira Rodrigo I. , Uehara Ryuhei , Valtr Pavel , Vogtenhuber Birgit , Welzl Emo 
Published: August 2021

Combinatorics
We prove that the dual graph of any arrangement of n lines in general position always contains a path of length at least n2/4. Further, we show that in every arrangement of n red and blue lines — in general position and not all of the same color — there is a simple path through at least n cells where red and blue lines are crossed alternatingly.
Packing and covering the balanced complete bipartite multigraph with cycles and stars
Authors: Lee Hung-Chih 
Published: August 2021

Graph Theory
Let Ck denote a cycle of length k and let Sk denote a star with k edges. For multigraphs F, G and H, an (F,G)-decomposition of H is an edge decomposition of H into copies of F and G using at least one of each. For L⊆H and R⊆rH, an (F,G)-packing (resp. (F,G)-covering) of H with leave L (resp. padding R) is an (F,G)-decomposition of H-E(L) (resp. H+E(R)). An (F,G)-packing (resp. (F,G)-covering) of H with the largest (resp. smallest) cardinality is a maximum (F,G)-packing (resp. minimum (F,G)-covering), and its cardinality is referred to as the (F,G)-packing number (resp. (F,G)-covering number) of H. In this paper, we determine the packing number and the covering number of λKn,n with Ck's and Sk's for any λ, n and k, and give the complete solution of the maximum packing and the minimum covering of λKn,n with 4-cycles and 4-stars for any λ and n with all possible leaves and paddings.
Balancedness of subclasses of circular-arc graphs
Authors: Bonomo Flavia , Duran Guillermo , Safe Martın D. , Wagler Annegret K. 
Published: August 2021

Graph Theory
A graph is balanced if its clique-vertex incidence matrix contains no square submatrix of odd order with exactly two ones per row and per column. There is a characterization of balanced graphs by forbidden induced subgraphs, but no characterization by mininal forbidden induced subgraphs is known, not even for the case of circular-arc graphs. A circular-arc graph is the intersection graph of a family of arcs on a circle. In this work, we characterize when a given graph G is balanced in terms of minimal forbidden induced subgraphs, by restricting the analysis to the case where G belongs to certain classes of circular-arc graphs, including Helly circular-arc graphs, claw-free circular-arc graphs, and gem-free circular-arc graphs. In the case of gem-free circular-arc graphs, analogous characterizations are derived for two superclasses of balanced graphs: clique-perfect graphs and coordinated graphs.
On the Hausdorff measure of regular ω-languages in Cantor space
Authors: Staiger Ludwig 
Published: August 2021

Automata, Logic and Semantics
This paper deals with the calculation of the Hausdorff measure of regular ω-languages, that is, subsets of the Cantor space definable by finite automata. Using methods for decomposing regular ω-languages into disjoint unions of parts of simple structure we derive two sufficient conditions under which ω-languages with a closure definable by a finite automaton have the same Hausdorff measure as this closure. The first of these condition is related to the homogeneity of the local behaviour of the Hausdorff dimension of the underlying set, and the other with a certain topological density of the set in its closure.
Classification of skew translation generalized quadrangles, I
Authors: Thas Koen 
Published: August 2021

Combinatorics
We describe new classification results in the theory of generalized quadrangles (= Tits-buildings of rank 2 and type B2), more precisely in the (large) subtheory of skew translation generalized quadrangles (``STGQs''). Some of these involve, and solve, long-standing open problems.
Symmetric bipartite graphs and graphs with loops
Authors: Cairns Grant , Mendan Stacey 
Published: August 2021

Graph Theory
We show that if the two parts of a finite bipartite graph have the same degree sequence, then there is a bipartite graph, with the same degree sequences, which is symmetric, in that it has an involutive graph automorphism that interchanges its two parts. To prove this, we study the relationship between symmetric bipartite graphs and graphs with loops.
Avoider-enforcer star games
Authors: Grzesik Andrzej , Mikalački Mirjana , Nagy Zoltán Lóránt , Naor Alon , Patkós Balázs , Skerman Fiona 
Published: August 2021

Combinatorics
In this paper, we study (1 : b) Avoider-Enforcer games played on the edge set of the complete graph on n vertices. For every constant k≥3 we analyse the k-star game, where Avoider tries to avoid claiming k edges incident to the same vertex. We consider both versions of Avoider-Enforcer games — the strict and the monotone — and for each provide explicit winning strategies for both players. We determine the order of magnitude of the threshold biases fmonF, f-F and f+F, where F is the hypergraph of the game.
A randomized algorithm for finding a maximum clique in the visibility graph of a simple polygon
Authors: Cabello Sergio , Saumell Maria 
Published: August 2021

Discrete Algorithms
We present a randomized algorithm to compute a clique of maximum size in the visibility graph G of the vertices of a simple polygon P. The input of the problem consists of the visibility graph G, a Hamiltonian cycle describing the boundary of P, and a parameter δ∈(0,1) controlling the probability of error of the algorithm. The algorithm does not require the coordinates of the vertices of P. With probability at least 1-δ the algorithm runs in O( |E(G)|2 / ω(G) log(1/δ)) time and returns a maximum clique, where ω(G) is the number of vertices in a maximum clique in G. A deterministic variant of the algorithm takes O(|E(G)|2) time and always outputs a maximum size clique. This compares well to the best previous algorithm by Ghosh et al. (2007) for the problem, which is deterministic and runs in O(|V(G)|2 |E(G)|) time.
Eulerian polynomials of type $D$ have only real roots
Authors: Savage Carla D. , Visontai Mirkó 
Published: August 2021

We give an intrinsic proof of a conjecture of Brenti that all the roots of the Eulerian polynomial of type $D$ are real and a proof of a conjecture of Dilks, Petersen, and Stembridge that all the roots of the affine Eulerian polynomial of type $B$ are real, as well.
Nous prouvons, de façon intrinsèque, une conjecture de Brenti affirmant que toutes les racines du polynôme eulérien de type $D$ sont réelles. Nous prouvons également une conjecture de Dilks, Petersen, et Stembridge que toutes les racines du polynôme eulérien affine de type $B$ sont réelles.