bluuebunny/crossref_metadata_2025_split huggingface dataset:
Study of parameter affecting morphology of electrospun poly (lactic acid) (PLA) fibers loaded with Ag/CaCO3 filler
Authors: Zin M E , Sutapun W 
Published: March 2022

Abstract
Silver nanoparticles (AgNPs) are widely used as antimicrobial agent in commercial products like textiles, cosmetics and drugs. AgNPs deposited on the surface of calcium carbonate (CaCO3) particles, serve as sustained release of antimicrobial activity. The silver nanoparticles embedded calcium carbonate particles (Ag/CaCO3) are prepared by a precipitation method. In this study, precipitated (Ag/CaCO3) filler will be used for preparation of Ag/CaCO3-poly(L-lactic acid) (Ag/CaCO3-PLA) nanofibers by electrospinning. Polymer concentration and functional filler amount in binary solvent system will be studied. The condition for fabricating electrospun PLA and Ag/CaCO3-PLA was a 15 cm of collection distance and 15 kV of working voltage. Morphology of Ag/CaCO3 loaded PLA electrospun fibers will be investigated by the field emission scanning electron microscope (FE-SEM). The electrospun fibers will be further applied as the antimicrobial material.
Characterization of injection molded polylactide stereocomplexes blended with thermoplastic starch and chain extender
Authors: Srithep Y , Pholharn D , Veang-in O , Morris J 
Published: March 2022

Abstract
Polylactide (PLA) is an interesting biodegradable polymer but has limited application because of its low thermal stability and brittleness. Both weaknesses of PLA were solved by stereocomplexes (ST) blended with thermoplastic starch (TPS). In this work, 15% and 30% TPS and 2% chain extender were blended with poly(L-lactide) (PLLA)/poly(D-lactide) (PDLA) (50/50) in an internal mixer. The blended materials were then injection molded into tensile specimens. Differential scanning calorimetry demonstrated that despite the added starch, the stereocomplex structures were still formed and stereocomplex crystallinity decreased with increasing starch content. Compared to neat PLLA, the melting temperature of the stereocomplex and its starch blends was about 55°C higher. The starch enhanced the elongation at break of the stereocomplex samples. Furthermore, stereocomplex and starch compatibility was improved by extending the chains, which in turn improved the stereocomplex and starch blend mechanical properties.
Monte Carlo simulations of nanotube filler in composite material: code optimization
Authors: Kerdkaen N , Sutthibutpong T , Phongphanphanee S , Boonchui S , Wong-ekkabut J 
Published: March 2022

Abstract
The electrically conductive polymer composites (CPCs) have attracted intensive attention for several decades due to their flexibility and unique electrical properties. CPCs are potentially used in many applications such as flexible electrodes, batteries, and strain sensors. The percolated conductive pathways are formed by conductive filler in polymer matrix which is a major effect on the electrical behavior of CPCs. Computational simulations have been used to study the percolation phenomena of CPCs. The simulation algorithms need to be developed and optimized for reducing the simulation time-consuming. In this study, the in-house Monte Carlo simulation that used to estimate percolation threshold is optimized. To simulate in the large-scale system, cut-off distance will be defined to avoid unnecessary complex calculations. The calculation sequence within the code has been rearranged to omit the unnecessary calculation processes. Results show that the optimized software takes less processing time than the previous version around 5 times. Therefore, we can perform the large system to investigate the percolation phenomenon with less lattice confinement effect.
Mechanical properties of laser-welded and adhesive-bonded ultra-high-strength steel lap joints
Authors: Hietala M , Keskitalo M , Järvenpää A 
Published: March 2022

Abstract
The need to manufacture lightweight structures from ultra-high-strength steels is forcing industry to look for new joining technologies. Hybrid joints are one of the new ways to join materials. This paper investigates joining ultra-high strength steel plates using laser welding and adhesive bonding. Steel used in this paper was abrasion resistant steel (AR600) with tensile strength (Rm) ≥ 2 GPa. Three different epoxy adhesives were used in the experiments. The weld morphologies were investigated using optical microscopy. The mechanical properties of the lap joints were evaluated by hardness measurements and tensile shear tests. Examining the profiles of the joints, it became clear that the adhesive causes an air gap between the plates, which affects the morphology of the joint. The air gap caused by the adhesive increased the width of the weld at the interface of the plates. The width of the weld at the interface was approximately 25% larger in the adhesive-bonded joint. Based on shear strength tests, the use of adhesive in addition to the laser weld significantly improved the shear strength of the lap joint. The shear strength of the best laser-welded and adhesive-bonded joint was approximately 84% higher than that of laser-welded joint.
Investigation of freshly prepared AgCl for high yield silver nanowires under polyol method
Authors: Yala S , Petchsang N 
Published: March 2022

Abstract
Silver nanowires (Ag NWs) have attracted much interest in academics and industries because of their potential applications in electronic devices such as flexible displays, pressure sensors, temperature sensors, and conductive layers. Generally, silver nanowire synthesized by the polyol method is the most common and promising chemical reaction. However, its by-products, a mixture of Ag NWs and silver nanoparticles, reduced Ag NWs performance. In this work, we reported the chemical method that is a fast and straightforward synthesis of Ag NWs by using freshly prepared silver chloride to avoid its degradation. The result showed that the freshly prepared silver chloride plays an essential role in promoting the formation of Ag NWs. The by-product was lower compared to using commercial silver chloride. We also found that avoiding boiling bubbles in flask via controlling temperature and reaction time by injecting ethylene glycol, resulting in decreased nanowires degradation. Furthermore, instantaneously decreasing temperature after finishing the cooking time helps reduce its by-product. A high yield of Ag NWs is noticeable under the observed synthetics.
Positive entropy implies chaos along any infinite sequence
Authors: Huang Wen , Li Jian , Ye Xiangdong 
Published: March 2022

Let

G
G

be an infinite countable discrete amenable group. For any

G
G

-action on a compact metric space

(
X
,
ρ
)

(X,\rho )

, it turns out that if the action has positive topological entropy, then for any sequence

{

s
i

}

i
=
1

+
∞

\{s_i\}_{i=1}^{+\infty }

with pairwise distinct elements in

G
G

there exists a Cantor subset

K
K

of

X
X

which is Li–Yorke chaotic along this sequence, that is, for any two distinct points

x
,
y
∈
K

x,y\in K

, one has
\[

lim sup

i
→
+
∞

ρ
(

s
i

x
,

s
i

y
)
>
0

and

lim inf

i
→
+
∞

ρ
(

s
i

x
,

s
i

y
)
=
0.

\limsup _{i\to +\infty }\rho (s_i x,s_iy)>0\ \text {and}\ \liminf _{i\to +\infty }\rho (s_ix,s_iy)=0.

\]
Four-factor prothrombin complex concentrate plus andexanet alfa for reversal of factor Xa inhibitor–associated bleeding: Case series
Authors: Liu JiTong , Elsamadisi Pansy , Philips Eli , Bauer Kenneth A , Eche Ifeoma M 
Published: March 2022

AbstractPurposeTo manage factor Xa (FXa) inhibitor–associated bleeding, andexanet alfa or 4-factor prothrombin concentrate (4F-PCC) has been used to restore hemostasis. However, literature on the outcomes for patients who received both andexanet alfa and 4F-PCC is limited.SummaryWe report a case series of 5 patients who received andexanet alfa plus 4F-PCC for reversal of FXa inhibitor–associated bleeding. Patients were included in this case series if they received both andexanet alfa and 4F-PCC for reversal of FXa inhibitor–associated bleeding. They were followed to either discharge or death, and in-hospital complications related to concurrent use of andexanet alfa and 4F-PCC were documented. We report an incidence of thromboembolism of 40% (2 of 5 cases) and an in-hospital mortality rate of 60% (3 of 5 cases). Taking these cases together with those in the existing literature, we found a total of 23 reported cases of safety outcomes with andexanet alfa plus 4F-PCC. The overall incidence of thromboembolism was 35% (8 of 23 cases).ConclusionThis case series adds to the limited literature describing the outcomes for patients receiving andexanet alfa plus 4F-PCC. We encourage other institutions to report safety data on administering both agents.
Exploring common genetic contributors to neuroprotection from amyloid pathology
Authors: Seto Mabel , Mahoney Emily R. , Dumitrescu Logan , Ramanan Vijay K. , Engelman Corinne D. , Deming Yuetiva , Albert Marilyn , Johnson Sterling C. , Zetterberg Henrik , Blennow Kaj , Vemuri Prashanthi , Jefferson Angela L. , Hohman Timothy J. ,   for the Alzheimer’s Disease Neuroimaging Initiative
Published: March 2022

Abstract
Preclinical Alzheimer’s disease describes some individuals who harbour Alzheimer’s pathologies but are asymptomatic. For this study, we hypothesized that genetic variation may help protect some individuals from Alzheimer’s-related neurodegeneration. We therefore conducted a genome-wide association study using 5 891 064 common variants to assess whether genetic variation modifies the association between baseline beta-amyloid, as measured by both cerebrospinal fluid and positron emission tomography, and neurodegeneration defined using MRI measures of hippocampal volume.
We combined and jointly analysed genotype, biomarker and neuroimaging data from non-Hispanic white individuals who were enrolled in four longitudinal ageing studies (n = 1065). Using regression models, we examined the interaction between common genetic variants (Minor Allele Frequency &gt;0.01), including APOE-ɛ4 and APOE-ɛ2, and baseline cerebrospinal levels of amyloid (CSF Aβ42) on baseline hippocampal volume and the longitudinal rate of hippocampal atrophy. For targeted replication of top findings, we analysed an independent dataset (n = 808) where amyloid burden was assessed by Pittsburgh Compound B ([11C]-PiB) positron emission tomography.
In this study, we found that APOE-ɛ4 modified the association between baseline CSF Aβ42 and hippocampal volume such that APOE-ɛ4 carriers showed more rapid atrophy, particularly in the presence of enhanced amyloidosis. We also identified a novel locus on chromosome 3 that interacted with baseline CSF Aβ42. Minor allele carriers of rs62263260, an expression quantitative trait locus for the SEMA5B gene (P = 1.46 × 10−8; 3:122675327) had more rapid neurodegeneration when amyloid burden was high and slower neurodegeneration when amyloid was low. The rs62263260 × amyloid interaction on longitudinal change in hippocampal volume was replicated in an independent dataset (P = 0.0112) where amyloid burden was assessed by positron emission tomography.
In addition to supporting the established interaction between APOE and amyloid on neurodegeneration, our study identifies a novel locus that modifies the association between beta-amyloid and hippocampal atrophy. Annotation results may implicate SEMA5B, a gene involved in synaptic pruning and axonal guidance, as a high-quality candidate for functional confirmation and future mechanistic analysis.
Approximate equations of PP-, PS1- and PS2-wave reflection coefficients in fluid-filled monoclinic media
Authors: Xie Tianyi , Lu Jun , Li Mengqi , Wang Yun 
Published: March 2022

SUMMARY
Studying the seismic reflection characteristics of fractured strata can provide a theoretical basis for the exploration of unconventional oil and gas reservoirs. When several (more than 1) sets of oblique vertical fractures that are rotationally non-invariant are embedded in an isotropic or vertical transversely isotropic (VTI) background, the stratum exhibits equivalent monoclinic anisotropy. However, the exact algorithm of the reflection and transmission coefficients of monoclinic media is algebraically complicated and difficult to use in theoretical analysis and application. In this paper, under the assumption that fractures are filled with fluid, based on the linear-slip theory, we solve the phase velocities of monoclinic media from the Christoffel equations by using the first-order perturbation method and then derive the recursive equations of the PP-, PS1-, and PS2-wave reflection coefficients. The theoretical analysis results show that for an interface of monoclinic media, when setting a series of fracture densities for the lower medium, the relative error of the proposed approximate reflection coefficient of the PS2 wave is less than 5.7 per cent, and those of the PP and PS1 waves are generally less than 2.5 per cent for a wide range of anisotropy strength and impedance contrast; when setting a series of fracture densities for the upper medium, the relative error of the proposed approximate reflection coefficients of the PP, PS1 and PS2 waves are generally less than 6.4, 5.1 and 4.5 per cent, respectively. When degenerated to the horizontal transversely isotropic model, compared with Rüger's approximation, at incidence angles of 1–30°, the two results are almost coincident, but the proposed approximations are closer to the exact solutions.
Results of open thoracoabdominal aortic replacement in patients unsuitable for or after endovascular repair with remaining disease components
Authors: Kondov Stoyan , Frankenberger Leon , Siepe Matthias , Keyl Cornelius , Staier Klaus , Humburger Frank , Rylski Bartosz , Kreibich Maximilian , Berger Tim , Beyersdorf Friedhelm , Czerny Martin 
Published: March 2022

Abstract

OBJECTIVES
Our goal was to evaluate outcomes in all-comer patients undergoing open thoracoabdominal aortic replacement either unsuitable for or after failed endovascular aortic repair.

METHODS
Within a 4-year period, we analysed a consecutive series of 80 patients undergoing elective, urgent and emergency thoracoabdominal aortic replacement. Preoperative data, intraoperative data and outcomes were evaluated. Specific attention was given to technical refinements needed in patients after previous endovascular aortic repair.

RESULTS
Eighty patients underwent thoracoabdominal aortic replacement: 11.3% (n = 9) had connective tissue disorders. Twenty-six patients (32.5%) had previous endovascular aortic repair and 54 (67.5%) did not have previous endovascular repair. The mean age was 64.2 ± 12 years, and 70% (n = 56) were male. The mean EuroSCORE was 7.9 ± 2.6. Urgent or emergency operations were done in 22.5% (n = 18). Overall mortality was 20% (n = 16); symptomatic spinal cord injury occurred in 5% (n = 4). We did not observe differences in survival according to the presence or absence of previous endovascular aortic repair (P = 0.524). Multivariate regression analysis revealed the amount of packed red blood cell units (P = 0.009, confidence interval 1.028–1.215, odds ratio = 1.117) as a predictor of in-hospital death. Follow-up was 100% (37.9 ± 15.8 months); freedom from aortic-related reintervention was 96.3%.

CONCLUSIONS
Despite an early attrition rate, survival after open thoracoabdominal aortic replacement is excellent, and freedom from aortic-related reintervention is high. Open surgery continues to remain an essential component in the treatment armamentarium of acute and chronic thoracoabdominal aortic pathology.
Companion Points on the Eigenvariety with Non-Regular Weights
Authors: Wu Zhixiang 
Published: March 2022

Abstract
We prove the existence of all companion points on the eigenvariety of definite unitary groups associated with generic crystalline Galois representations with possibly non-regular weights under the Taylor–Wiles hypothesis, based on the previous results of Breuil–Hellmann–Schraen [8] in regular cases and the author in [33] in non-regular cases.
The American Appropriation of Dietrich Bonhoeffer’s Legacy
Authors: Looper Joel 
Published: March 2022

AbstractIn recent years, American journalists and academics have appropriated the legacy of German theologian Dietrich Bonhoeffer to further their political and social agendas. Rather than leveraging Bonhoeffer’s name to buttress a particular political position, this article contrasts the fundamental political assumptions we find in Bonhoeffer’s writings with those of the American theologian Reinhold Niebuhr, then demonstrates that the sensibilities of the key Americans appropriating Bonhoeffer’s legacy are fundamentally Niebuhrian. In this way, Bonhoeffer’s political commitments are shown to be quite different than those of his American admirers. The article concludes with the claim that Bonhoeffer should be read today as a voice from outside contemporary American political discussions, but one that can be relevant nonetheless.
Development of Tools to Age Grand Fir to Aid in Collaborative Restoration of Federal Lands in Eastern Oregon
Authors: Johnston James D , Lindsay Amanda A 
Published: March 2022

AbstractThe USDA Forest Service is working closely with collaborative stakeholder groups to accelerate the pace and scale of restoration in fire-prone mixed conifer forests of eastern Oregon. Collaboratively planned restoration projects are typically designed to conserve older trees established before fire exclusion policies and other management practices began to alter forest landscapes beginning in the late 1800s. Tools exist for accurately estimating the age of common species including ponderosa pine, Douglas-fir, and western larch. There are no existing tools available for aging grand/white fir, although an important objective of many restoration projects in mixed conifer stands is to retain older grand/white fir while removing younger individuals that have infilled into stands in the absence of fire to enhance resilience of stands to future climate and disturbance regimes. This article describes the development of tools to age grand fir on the Malheur National Forest by taking simple field measurements of morphological characteristics. Bark fissure depth, height to live foliage, and diameter at breast height were the strongest noncorrelated tree morphological characteristics associated with tree age. Crown class had no predictive power for estimating tree age. A variety of methods are presented that can estimate the age of grand fir with reasonable accuracy and are appropriate for different management objectives. Additional field testing and continued experimentation with different tree aging methods within an adaptive management framework is recommended.Study Implications: Shade tolerant grand fir has expanded dramatically in mixed conifer stands of eastern Oregon in the absence of frequent fire. Collaboratively designed restoration projects in mixed conifer stands usually call for the removal of younger grand fir while maintaining older grand fir that contribute to stand- and landscape-scale biodiversity. It can be difficult to estimate the age of grand fir based on morphological clues because of highly variable growth forms in this species. However, several easy-to-use grand fir aging tools promise to facilitate restoration by making reasonably accurate estimates of tree age.
Incisional metastatic breast carcinoma deposit in a total knee replacement presenting as peri-prosthetic joint infection—a case report
Authors: Rajeev Aysha , Elzawahry Ahmed , Rakhra Simren , Singisetti Kiran 
Published: March 2022

Abstract
Cutaneous metastasis from the primary breast carcinoma occurs when the disease is wide spread and can present as skin infection especially in a previous well-healed scar. If the secondary deposit is over a total knee incisional site it can mimic peri-prosthetic joint infection. We report a rare and unusual case of a woman who presented with clinical signs and symptoms of a peri-prosthetic total knee replacement which on biopsy turned out to be cutaneous metastasis from a previously treated breast cancer. Chronic granulation tissue in a total joint incisional scar may present as peri-prosthetic joint infection. A good history taking and clinical examination with specimens from the skin lesions send for both microbiology and histopathology is recommended to arrive at an early and accurate diagnosis.
Constraining the original composition of the gas forming first-generation stars in globular clusters
Authors: Legnardi M V , Milone A P , Armillotta L , Marino A F , Cordoni G , Renzini A , Vesperini E , D’Antona F , McKenzie M , Yong D , Dondoglio E , Lagioia E P , Carlos M , Tailo M , Jang S , Mohandasan A 
Published: March 2022

ABSTRACT
Disentangling distinct stellar populations along the red-giant branches (RGBs) of globular clusters (GCs) is possible by using the pseudo-two-colour diagram dubbed chromosome map (ChM). One of the most intriguing findings is that the so-called first-generation (1G) stars, characterized by the same chemical composition of their natal cloud, exhibit extended sequences in the ChM. Unresolved binaries and internal variations in helium or metallicity have been suggested to explain this phenomenon. Here, we derive high-precision Hubble Space Telescope photometry of the GCs NGC 6362 and NGC 6838 and build their ChMs. We find that both 1G RGB and main-sequence (MS) stars exhibit wider ChM sequences than those of second-generation (2G). The evidence of this feature even among unevolved 1G MS stars indicates that chemical inhomogeneities are imprinted in the original gas. We introduce a pseudo-two-magnitude diagram to distinguish between helium and metallicity, and demonstrate that star-to-star metallicity variations are responsible for the extended 1G sequence. Conversely, binaries provide a minor contribution to the phenomenon. We estimate that the metallicity variations within 1G stars of 55 GCs range from less than [Fe/H]∼0.05 to ∼0.30 and mildly correlate with cluster mass. We exploit these findings to constrain the formation scenarios of multiple populations showing that they are qualitatively consistent with the occurrence of multiple generations. In contrast, the fact that 2G stars have more homogeneous iron content than the 1G challenges the scenarios based on accretion of material processed in massive 1G stars on to existing protostars.
Close, bright, and boxy: the superluminous SN 2018hti
Authors: Fiore A , Benetti S , Nicholl M , Reguitti A , Cappellaro E , Campana S , Bose S , Paraskeva E , Berger E , Bravo T M , Burke J , Cai Y-Z , Chen T-W , Chen P , Ciolfi R , Dong S , Gomez S , Gromadzki M , Gutiérrez C P , Hiramatsu D , Hosseinzadeh G , Howell D A , Jerkstrand A , Kankare E , Kozyreva A , Maguire K , McCully C , Ochner P , Pellegrino C , Pignata G , Post R S , Elias-Rosa N , Shahbandeh M , Schuldt S , Thomas B P , Tomasella L , Vinkó J , Vogl C , Wheeler J C , Young D R 
Published: March 2022

ABSTRACT
SN 2018hti was a very nearby (z = 0.0614) superluminous supernova with an exceedingly bright absolute magnitude of −21.7 mag in r band at maximum. The densely sampled pre-maximum light curves of SN 2018hti show a slow luminosity evolution and constrain the rise time to ∼50 rest-frame d. We fitted synthetic light curves to the photometry to infer the physical parameters of the explosion of SN 2018hti for both the magnetar and the CSM-interaction scenarios. We conclude that one of two mechanisms could be powering the luminosity of SN 2018hti; interaction with ∼10 M⊙ of circumstellar material or a magnetar with a magnetic field of Bp∼ 1.3 × 1013 G, and initial period of Pspin∼ 1.8 ms. From the nebular spectrum modelling we infer that SN 2018hti likely results from the explosion of a ${\sim}40\, \mathrm{M}_\odot$ progenitor star.