bluuebunny/crossref_metadata_2025_split huggingface dataset:
Scapholunate Diastasis in Distal Radius Fractures: Fracture Pattern Analysis on CT Scans
Authors: Özkan Sezai , Mudgal Chaitanya S. , Jupiter Jesse B. , Bloemers Frank W. , Chen Neal C. 
Published: June 2020

Abstract
Objectives Our understanding of distal radius fractures with concomitant scapholunate (SL) diastasis primarily comes from plain radiographs and arthroscopy. The clinical implications of SL diastasis are not clear. The aim of this study is to describe fracture characteristics of distal radius fractures on computed tomography (CT) scans in patients with distal radius fractures and static SL diastasis.
Methods We queried our institutional databases to identify patients who were treated for a distal radius fracture, had a CT scan with a wrist-protocol, and static SL diastasis on their CT scan. Our final cohort consisted of 26 patients. We then collected data on their demographics, injury, treatment, evaluated injury patterns, and measured radiographic SL characteristics. Our study cohort consisted of 11 men (42%) and almost half of our cohort (n = 12; 46%) had a high-energy mechanism of injury. The majority of the patients (n = 20; 77%) had operative treatment for their distal radius fracture and two patients (7.7%) had operative treatment of their SL injury.
Results The mean SL distance was 3.5 ± 1.1 mm. Twenty patients (77%) had an intra-articular fracture. In these patients, we observed three patterns: (1) scaphoid facet impaction; (2) lunate facet impaction; and (3) no relative impaction. We observed other injury elements including rotation of the radial styloid relative to the lunate facet and partial carpal subluxations.
Conclusion Static SL dissociation in the setting of distal radius fractures may be an indication of a complex injury of the distal radius, which may not be directly apparent on plain radiography. If these radiographs do not demonstrate impaction of the lunate or scaphoid facet, a CT scan may be warranted to have a more detailed view of the articular surface.
Level of Evidence This is a Level III, diagnostic study.
Arthroscopic Bone Grafting and Arthrodesis of Partial Lunotriquetral Coalition
Authors: Sivakumar Brahman S. , Smith Nicholas C. 
Published: June 2020

Abstract
Background Lunotriquetal coalition is the most common carpal coalition that can be symptomatic if trauma disrupts the syndesmosis or synchondrosis or if degenerative changes develop between the abnormal articulating surfaces.
Case Description A 15-year-old boy presented with a symptomatic lunotriquetral coalition after a fall 2 years prior. Following appropriate investigation, he was managed via arthroscopic debridement, bone grafting, and lunotriquetral arthrodesis.
Literature Review The majority of symptomatic lunotriquetral coalitions have been managed with open arthrodesis. There is only one prior report of arthroscopic arthrodesis of this articulation that did not utilize bone graft.
Relevance This report details the procedure to allow arthroscopic lunotriquetral arthrodesis with bone grafting, conveying osteogenic properties, and encouraging incorporation at the fusion site while maintaining the dorsal ligaments.
Radiocarbon-based approach capable of subannual precision resolves the origins of the site of Por-Bajin
Authors: Kuitems Margot , Panin Andrei , Scifo Andrea , Arzhantseva Irina , Kononov Yury , Doeve Petra , Neocleous Andreas , Dee Michael 
Published: June 2020

Significance
The problem with radiocarbon dating is that its resolution is only centennial or, at the very best, decadal. Thus, the method is incapable of resolving many historical problems. Here, we use recent developments in atmospheric science to date the construction of a renowned archaeological site to the exact year, in fact, to the exact season. Such precision opens up new possibilities for the broader study of human history. Achieving dates on an annual scale will offer the potential for new assessments to be made of considerable archaeological significance.
Extraction of the CKM phase γ from the charmless two-body B meson decays *
Authors: Zhou Si-Hong , Lü Cai-Dian 
Published: June 2020

Abstract
Using all experimentally measured charmless

,

decay modes, where

denotes a light pseudoscalar (vector) meson, we extract the CKM angle

by a global fit. All hadronic parameters are determined from the experimental data, such that the approach is least model dependent. The contributions of the various decay modes are classified by the topological weak Feynman diagram amplitudes, which are determined by the global fit. To improve the precision of the approach, we consider the flavor SU(3) breaking effects of the topological diagram amplitudes of the decay modes by including the form factors and decay constants. The fit result for the CKM angle

is

. It is consistent with the current world average values but has a smaller uncertainty.
PandaX limits on the light dark matter with a light mediator in the singlet extension of MSSM *
Authors: Wang Wenyu , Wu Jia-Jun , Xiong Zhao-Hua , Zhao Jun 
Published: June 2020

Abstract
Using the latest PandaX limits on the light dark matter (DM) with a light mediator, we check their implication on the parameter space of the general singlet extension of MSSM (without Z
3 symmetry), which can have a sufficient DM self-interaction to solve the small-scale structure problem. We find that the PandaX limits can tightly constrain the parameter space, depending on the coupling λ between the singlet and doublet Higgs fields. For the singlet extension of MSSM with Z
3 symmetry, the so-called NMSSM, we also demonstrate the PandaX constraints on its parameter space, which gives a light DM with the correct relic density but without sufficient self-interaction to solve the small-scale structure problem. We find that in NMSSM, the GeV dark matter with a sub-GeV mediator is tightly constrained.
Connecting muon anomalous magnetic moment and multi-lepton anomalies at LHC
Authors: Sabatta Danielle , Cornell Alan S. , Goyal Ashok , Kumar Mukesh , Mellado Bruce , Ruan Xifeng 
Published: June 2020

Abstract
In a previous paper by several of the authors a number of predictions were made in a study pertaining to the anomalous production of multiple leptons at the Large Hadron Collider (LHC). Discrepancies in multi-lepton final states have become statistically compelling with the available Run 2 data. These could be connected with a heavy boson, H, which predominantly decays into a standard model Higgs boson, h, and a singlet scalar, S, where

GeV and

GeV. These can then be embedded into a scenario where a two-Higgs-doublet is considered with an additional singlet scalar, 2HDM+S. The long-standing discrepancy in the muon anomalous magnetic moment,

, is interpreted in the context of the 2HDM+S type-II and type-X, along with additional fermionic degrees of freedom. The 2HDM+S model alone, with constraints from the LHC data, does not seem to explain the

anomaly. However, adding fermions with mass of order

GeV can explain the discrepancy for sufficiently low values of fermion-scalar couplings.
Axialvector tetraquark candidates for Zc(3900), Zc(4020), Zc(4430), and Zc(4600) *
Authors: Wang Zhi-Gang 
Published: June 2020

Abstract
We construct the axialvector and tensor current operators to systematically investigate the ground and first radially excited tetraquark states with quantum numbers

using the QCD sum rules. We observe one axialvector tetraquark candidate for

and

, two axialvector tetraquark candidates for the

, and three axialvector tetraquark candidates for

.
Key factor for determining relation between radius and tidal deformability of neutron stars: Slope of symmetry energy *
Authors: Zhang Nai-Bo , Qi Bin , Wang Shou-Yu 
Published: June 2020

Abstract
The constraints on tidal deformability

of neutron stars were first extracted from GW170817 by LIGO and Virgo Collaborations. However, the relationship between the radius

and tidal deformability

is still under debate. Using an isospin-dependent parameterized equation of state (EOS), we study the relation between

and

and its dependence on parameters of symmetry energy

and EOS of symmetric nuclear matter

when the mass is fixed at

,

, and

. We find that, although the changes of high order parameters of

and

can shift individual values of

and

, the

relation remains approximately at the same fitted curve. The slope

of the symmetry energy plays the dominant role in determining the

relation. By investigating the mass dependence of the

relation, we find that the well fitted

relation for 1.4

is broken for massive neutron stars.
Classifying cosmic-ray proton and light groups in LHAASO-KM2A experiment with graph neural network *
Authors: Jin Chao , Chen Song-zhan , He Hui-hai , Collaboration) (for the LHAASO 
Published: June 2020

Abstract
The precise measurement of cosmic-ray (CR) knees of different primaries is essential to reveal CR acceleration and propagation mechanisms, as well as to explore new physics. However, the classification of CR components is a difficult task, especially for groups with similar atomic numbers. Given that deep learning achieved remarkable breakthroughs in numerous fields, we seek to leverage this technology to improve the classification performance of the CR Proton and Light groups in the LHAASO-KM2A experiment. In this study, we propose a fused graph neural network model for KM2A arrays, where the activated detectors are structured into graphs. We find that the signal and background are effectively discriminated in this model, and its performance outperforms both the traditional physics-based method and the convolutional neural network (CNN)-based model across the entire energy range.
Accretion on high derivative asymptotically safe black holes *
Authors: Farooq M. Umar , Ahmed Ayyesha K. , Yang Rong-Jia , Jamil Mubasher 
Published: June 2020

Abstract
Asymptotically safe gravity is an effective approach to quantum gravity. It is important to differentiate modified gravity, which is inspired by asymptotically safe gravity. In this study, we examine particle dynamics near the improved version of a Schwarzschild black hole. We assume that in the context of an asymptotically safe gravity scenario, the ambient matter surrounding the black hole is of isothermal nature, and we investigate the spherical accretion of matter by deriving solutions at critical points. The analysis of various values of the state parameter for isothermal test fluids, viz., k = 1, 1/2, 1/3, 1/4 show the possibility of accretion onto an asymptotically safe black hole. We formulate the accretion problem as Hamiltonian dynamical system and explain its phase flow in detail, which reveals interesting results in the asymptotically safe gravity theory.
Cosmological scenario based on particle creation and holographic equipartition *
Authors: Tu Fei-Quan , Chen Yi-Xin , Huang Qi-Hong 
Published: June 2020

Abstract
We propose a cosmological scenario that describes the evolution of the universe based on particle creation and holographic equipartition. The model attempts to solve the inflation of the early universe and the accelerated expansion of the present universe without introducing the dark energy from the thermodynamical perspective. Throughout the evolution of the universe, we assume that the universe consistently creates particles, and that the holographic equipartition is always satisfied. Further, we set the creation rate of particles proportional to

in the early universe and to H in the present and late universe, where H depicts the Hubble parameter. Consequently, we obtain the solutions

and

for the early universe and solutions

and

for the present and late universe, respectively, where

and

are the parameters. Finally, we obtain and analyze two important thermodynamic properties for the present model.
Increasing the solar cell efficiency using glass balls
Authors: Issa Naji Ammar , Abdulhussein Hafedh Khalid , Idan Fadheel Kreem 
Published: June 2020

Abstract
Solar cells lose high percent of their capacity as a result of insufficient solar radiation, due to changing of the solar angle of projection during the day. Thus this research aims to increase the cell efficiency by a novel method which is based on collecting rays in the convex focus and dispersed in the concave lens, to make the rays always perpendicular on cells. To achieve this purpose, glass balls with a diameter of 10 mm were used and arranged on the cell area. This work found an obvious increasing in the cell efficiency, where it is possible to have an increasing in generating voltage by an estimated 7.53%, and the current 1.086% by this novel method.
Quality of stingless bee honey based on volatile organic compounds and gas released
Authors: Nur Ain Mohammed Hassan Khairiah , Kamarulzaman Raja Ibrahim Raja , Hani Jameela Sapingi Husni , Afiq Daniel Azmi Muhammad , Zakaria Zarita , Ihsan Nurashikin 
Published: June 2020

Abstract
The aim of this study is to investigate the volatile organic compound released by stingless bee honey stored at room temperature (≈24°C) for 10 days and how yeast can influence the stingless bee honey quality. A newly harvested stingless bee honey is divided into 8 samples with each containing 100 ml. Each sample is filled into a glass bottle and 8 samples are considered for 8 different days of evaluation. Gas produced by the samples are collected and analyzed using FTIR coupled with White Gas Cell. The spectrum analysis is done by comparing the spectrum of volatile compound with the infrared fingerprint spectral characteristics from Infrared Analysis Inc. database library via Perkin Elmer’s spectrum software. Ethanol, methanol, methane, carbon dioxide, water vapour, and ethyl acetate were found to be released by the stingless honey samples. The bands area were identified in order to calculate the concentration of volatile compounds in the honey’s gas. The trend of each of the volatile gasses can be seen from Day-1 until Day-8 of evaluation. To study the presence of yeast, 10 g of stingless bee honey is incubated overnight in nutrient broth followed by centrifuging 1.5 ml of the culture broth repeatedly to obtain cell pellet for VPSEM analysis. VPSEM results indicated that morphology of yeast found in the honey sample. Ethanol concentration found to decrease by time however detailed analysis revealed that sample with the presence of yeast shows an increase of ethanol deliberated by the stingless bee honey. This result affirmed that the presence of yeast may facilitate the further alcoholic fermentation in stingless bee honey by which affecting the sensory value of the stingless bee honey.
Structure and Percolation Thresholds in Magnesia Stabilized ZrO2-MgO Porous Composite
Authors: Buyakov Ales , Kulkov Sergei 
Published: June 2020

Abstract
This work reports the influence of porous ZrO2-MgO ceramic composition on its structure and mechanical properties. The bimodal pore structure were formed by introduction of organic pore forming particles into the initial powder composition and due to the voids between ceramic powder particles. It was shown, that the mechanical parameters of the porous ZrO2-MgO composite are substantially defined by the value of the microstresses, the MgO content, and, apparently, the formation of a percolation structure. Thus, it was shown that by varying the composition and the size of the pore-forming particles, it is possible to achieve a high degree of identity with the structure and properties of natural bone tissue.
Molar mass determination of polylactic acid alternatives by capillary viscometry method
Authors: Horváth T , Szabó T J , Marossy K 
Published: June 2020

Abstract
The molar mass of polymers is a basic property that defines the appropriate processing method and the field of application of polymers. Therefore, the measurement of molar weights is a crucial point of polymer synthesis. In absence of modern but expensive equipment a rheology-based method can be used to define the molar mass with reliable result. By evaluation of molar mass, the entire polymerization can be monitored and controlled.
During my experiments polylactic acid alternatives (PLLA, PDLA, PDLLA) have been synthesized by direct polycondensation methods. According to the relevant literature, by this method and with the adequate setup of its parameters 104-105 g·mol−1 molar mass can be reached. The two most important parameters are the process time and temperature that strongly effects on the value of molar mass of polymer. In this work standard polycondensation method has been used to produce the mentioned polylactic acid alternatives then the molar masses of polylactic acid polymers were calculated by followed the correlation of Mark – Houwink relation.
The Dependence of Actual Laser Cutting Speed on CNC Sheet Equipment on Number of NC Program Commands for Metal Grades 1.0114 and AWAIMg3
Authors: Petunin Alexander , Tavaeva Anastasia 
Published: June 2020

Abstract
One of the complex optimization problems arising in technical applications is the cutting path problem for CNC sheet metal cutting machines. This problem is to optimize the tool path for the CNC technological equipment when cutting a fixed set of parts allocated on sheet metal. The time of cutting process is one of objective functions for the optimization problem. This objective function depends on six parameters of cutting process: 1) cutting speed; 2) lengths of the cutting tool path; 3) speed of idling motion of tool; 4) length of idling motion; 5) number of piercings; 6) time of one piercing. When programming NC program, speed of cutting is defined by the user of the CAM (Computer-Aided-Manufacturing) system and considered as a constant. However, this is actually not the case. Consequently, the problem of exact calculation of objective function is arisen. In order to solve this problem, the correction coefficients for the cutting speed value defined by the user must been calculated. Obviously, these coefficients will vary for different thicknesses and grades of metal. The paper presents the results of investigates, which made it possible to find the functional dependences of the cutting speed for the CNC laser cutting machine (CO2) on the number of NC program commands for the following metal grades: 1.0114 (thickness Δ = 1-10 mm) and AWAIMg3 (Δ = 1-5 mm).The statistical materials of experiments were processed by using software “Mathcad”. The received results show that the actual average value of cutting speed is monotonically decreasing function depended on number of NC program commands. In addition, the calculation of the actual cutting speed provides not only an accurate calculation of the value of the objective function, but also, as a result, the correct finding of the optimal tool path
Experimental study of the ultrasonic welding effects in the metal joint microstructure
Authors: Anna Kovács Tünde 
Published: June 2020

Abstract
In this article will present the technology parameters effects in the case of thin copper sheets joining with agree of the material science theory and metalworking rules-based executed experiments. Known the dislocation theory of the ultrasound energy influence in the case of the metalworking. The ultrasonic welding technology uses the ultrasound effect for increase the metal formability because the joint established by high-frequency vibration and pressing. The ultrasonic welding is a solid-state welding technology in which detectable the high-frequency vibration caused friction effected warming in the joint and the heat-affected zone. The established heat accompanied by plastic deformation can cause Changement in the joint microstructure as a function of the established heat, the heat transfer coefficient and the plastic deformation degree of the used metal. The relationship is founded between the experimented metal thin sheets welded joint mechanical properties, microstructure and the welding parameters. The joint mechanical and microstructural properties experimented by Vickers hardness test and visual inspections.
Mechanical Behavior of the Spine Segment
Authors: Rikun Yu A , Chaikovskaya (Kolmakova) T V , Kulkov S N 
Published: June 2020

Abstract
The article presents the model of intervertebral disc, that takes into account the presence of a nucleus pulposus and an annulus fibrous containing collagen fibers with direction at angles ±45º and ±30º. The influence of the percentage of layers of the annulus fibrous with different directions of collagen fibers on the stress-strain state of the intervertebral disc was investigated.
ZrC-TiC-MoSi2 ceramic composite by spark plasma sintering
Authors: Hussainova Irina , Minasyan Tatevik , Liu Le , Aydinyan Sofiya 
Published: June 2020

Abstract
ZrC-TiC-MoSi2 ceramic composite was consolidated by spark plasma sintering at 1850-1900°C temperature, for 5-10 min of dwell time under 50 MPa of applied pressure. The influence of MoSi2 addition on the mechanical performance and microstructure of ZrC-TiC composite was investigated. Compared with ZrC-TiC, the sinterability of ZrC-TiC-MoSi2 was improved, as the latter one achieved relatively fully dense bulk under the same sintering conditions. The hardness and fracture toughness of ZrC-TiC-MoSi2 composite were increased remarkably manifesting >99% of density, 29.8 GPa of Vicker’s hardness, and indentation fracture toughness of 8.01 MPa·m1/2. Under erosion and fracturing conditions, it was shown that solid solutions of (Zr,Ti)C serve an important role in erosion and crack propagation resistance.
Examination of mullite ceramic specimens made by conventional casting method from kaolin and sawdust
Authors: Kurovics E , Ibrahim J F M , Tihtih M , Udvardi B , Nuilek K , Gömze L A 
Published: June 2020

Abstract
Using relatively low-cost raw materials (conventional kaolin and sawdust powders) and simple technology, the authors have developed new ceramic composite materials which can successfully meet different industrial requirements. Casting masses (slurries) were made by mixing and milling different compositions of the powders with distilled water. The ceramic specimens were made by conventional gravitation slipcasting method, after drying of the green specimens, the samples were sintered in an electric kiln under oxidation and reduction atmosphere at 1250°C. The prepared and sintered specimens were tested based on geometrical sizes, microstructures and morphologies using scanning electron microscopy. In this work, the authors present some parts of the results of their research and investigation.
Rheological parameters of polymer-silicate gels
Authors: Mastalska-Popławska J , Izak P , Wójcik Ł , Góral Z , Stempkowska A 
Published: June 2020

Abstract
Hydrogels, due to their unique properties (they can absorb large amounts of solution, sometimes even several hundred times higher than their initial mass), have found application in many areas of life. Their polymerization rate depends for example on the pH, temperature, composition of the polymerization mixture, amount of the initiators, degree of cross-linking of the polymer and composition of the polymerization mixture.
The results of the kinetic reactions showed that the increased proportion of silicate in the sample causes faster gelation. It was also found that the lower the silicate modulus is, the polymerization reaction starts faster. However, oscillation tests carried out 24 hours after synthesis showed that better elastic properties (higher values of the elastic modulus G’) show samples with higher content of polymer in the composition.