bluuebunny/crossref_metadata_2025_split huggingface dataset:
Thermal and Dielectric Properties of 3D Printed Parts Based on Polylactic Acid Filled with Carbon Nanostructures
Authors: Spinelli Giovanni , Kotsilkova Rumiana , Ivanov Evgeni , Georgiev Vladimir , Naddeo Carlo , Romano Vittorio 
Published: October 2022

AbstractPolylactic acid (PLA) containing 12 wt% of nanofillers, such as multi‐walled carbon nanotubes (MWCNTs), graphene nanoplates (GNPs), is considered to obtain a non‐conventional filament suitable for additive manufacturing (AM) process with enhanced thermal and electrical properties. In details, three‐dimensional (3D) printed specimens obtained by means of fused deposition modeling (FDM) are experimentally characterized in terms of thermal conductivity and relative permittivity. The results are interpreted on the basis of the different features of the fillers and their interaction with the PLA, as evidenced by a morphological analysis. It is found better thermal transport by using two‐dimensional (2D) shape nanoparticles (GNPs) with an improvement of about 260% respect to the unfilled polymer most likely due to its favorable arrangement and the lower thermal boundary resistance between the two phases, matrix, and fillers. Differently, mono‐dimensional filler like MWCNTs is to be preferred in order to obtain higher value for the relative permittivity, due to the enhancement of the interfacial polarization and the presence of functionalized groups. It is found a value of 5.35 × 103 much greater than that of 3.7 measured for pure PLA. Given the good combined thermal and dielectric properties, such materials are promising candidates for packaging applications with electromagnetic (EM) shielding capability.
Durability of a Soya‐Derived Flexible PU Foam for Mattresses: Effects of Different Artificial Aging
Authors: D'Arienzo Lucia , Incarnato Loredana , Rinaldi Stefania , Scarfato Paola 
Published: October 2022

AbstractThe aim of this work is to investigate the durability on long timescales of an innovative sustainable soy‐derived PU flexible foam used for mattresses fabrication. The foam samples have been submitted to two different accelerated aging procedures, by exposure in an environmental chamber at controlled temperature, humidity, and UV radiation, and by performing cyclic fatigue loadings in a mattress aging station. The effects of the changes on structural properties and foam comfort levels (i.e., hysteresis loss, surface firmness, and resistance to bottoming out) have been evaluated after both artificial weathering experiments. The results show that the different weathering factors reduce the foam comfort factors in static conditions, causing a progressive softening of the aged samples accompanied by a decrease of their ability to distribute body weight. Oxidation phenomena due to UV weathering mainly affects the chemical structure of the polyurethane foam, giving a yellowing of the material, whereas the fatigue cycles determine a partial disruption of the cellular structure, with the formation of very large pores.
Processing‐Properties Correlation for a Rubber Toughened Wood Plastic Composite
Authors: Mazzanti Valentina , Malagutti Lorenzo , Sbardella Francesca , Mollica Francesco 
Published: October 2022

AbstractIssues of environmental sustainability attract more and more attention to polymeric systems that can be considered environmentally friendly. A class of materials that meets the demand for a lower environmental impact are Wood Polymer Composites, or WPCs. These are thermoplastic polymers compounded with wood fibers or flour, usually coming from industrial or agricultural waste. With these materials, the greatest benefit is obtained by increasing the wood content, thus reducing the percentage of polymeric matrix. On the other hand, two of the main drawbacks coming from an increase in the wood content are brittleness and a significant reduction in processability. In this work, concentration will be on reducing brittleness by adding different amounts of a toughening agent (i.e., a thermoplastic elastomer) and on finding the optimal combination between processing conditions and elastomer content. This target will be obtained by comparing the tensile properties of all composites that are produced with different extrusion conditions with their apparent density.
Effect of Agave Leaves Fibers (ALF) Content on Thermal, Mechanical, and Surface Properties of Poly(3‐Hydroxybutyrate‐co‐3‐Hydroxyhexanoate) (PHBHHx) Biocomposites
Authors: Idres Celia , Dehouche Nadjet , Kaci Mustapha , Lainé Carole , Bruzaud Stéphane 
Published: October 2022

AbstractThe development of new bio‐based and biodegradable composites with enhanced performances is an efficient route to achieve a sustainable materials production. In this work, biocomposites materials based on PHBHHx reinforced with Agave leaves fibers (ALF) are elaborated by melt compounding at various filler content ratios, i.e., 10, 20, and 30 wt%. Thermal stability, tensile, and surface properties are investigated aiming to evaluate the effect of the ALF content on the material properties. The results show that the addition of ALF leads to reinforcement effect on PHBHHx, which is more pronounced at 30 wt%. Conversely, thermal stability of the biocomposites slightly decreases compared with the neat polymer, while the surface properties are almost unchanged whatever the filler content.
Experimental and Theoretical Investigation of the Mechanical Properties of PHBH Biopolymer Parts Produced by Fused Deposition Modeling
Authors: Nobili Andrea , Signorini Cesare , Volpini Valentina 
Published: October 2022

AbstractThe mechanical response of printed dog‐bone specimens of poly(3‐hydroxybutyrate‐co‐3‐hydroxyhexanoate) (PHBH) in linear and nonlinear regimes is investigated. Fused filament fabrication (FFF), also regarded as fused deposition modeling (FDM), is adopted to manufacture the PHBH elements. A compressible Mooney–Rivlin constitutive law is back fitted onto digital image correlation (DIC) data, as well as uni‐axial tensile test data. Effective mechanical properties are given, which may be used to design and optimize the response of printed structures. Strain values at the verge of failure in tension are also experimentally obtained. Results are especially useful for modeling mechanical response of PHBH, which is an emerging biopolymer with promising application fields in biomedical engineering, through additive manufacturing techniques.
Biomimetic Synthesis of Au‐Nps using Cassia fistula Flower Extract and Studies of their Protein Interaction
Authors: Parrey Sajjad Hussain , Ud Din Parray Mehraj , Manoharadas Salim , Altaf Mohammad , Alrefaei Abdulwahed Fahad , Badjah Hadj Ahmed Yacine M. , Patel Rajan , Ahmad Rabia , Khan Abbul Bashar 
Published: October 2022

AbstractGold nanoparticles (Au‐Nps) were synthesized by mediating Cassia fistula flower extract (CFFE) as reducing agent in absence and presence of sodium dodecyl sulphate (SDS) for the first time. Surface Plasmon Resonance (SPR) peak at around 550 nm was used for preliminary inference in the development of nanoparticles (Nps). With the increase in [SDS] the λSPR rises from 548 to 585 nm but the intensity of absorption decreased from pre to post cmc [SDS]. The Fourier transform infra‐red (FTIR) was performed in absence and presence of SDS in order to ascertain the biomimetic reduction by CFFE and explain the bio‐reduction of (Au3+) ions from the HAuCl4. For the preliminary size and dispersity of Au‐Nps dynamic light scattering (DLS) was performed to observe the shape and crystallite size of Au‐Nps,transmission electron microscopy (TEM) was performed which revealed multiple shapes and dispersity in the different conditions under which the synthesis was carried out. The synthesis was kinetically scanned by UV‐visible spectroscopy that led to the assumption of pseudo first order kinetics with respect to HAuCl4 and CFFE reagents. The NPs were characterized with X‐ray diffraction (XRD) for crystallinity and crystallite size. The protein interaction studies of Au‐Nps with rabbit serum albumin (RSA) in absence and presence of SDS were accomplished by using UV‐visible spectroscopy, DLS and fluorescence spectroscopy etc, that confirmed the denaturing and aggregation of the RSA protein in presence of SDS.
Branched SL(2,ℤ) duality
Authors: Bergshoeff Eric A. , Grosvenor Kevin T. , Lahnsteiner Johannes , Yan Ziqi , Zorba Utku 
Published: October 2022

Abstract
We investigate how SL(2,ℤ) duality is realized in nonrelativistic type IIB superstring theory, which is a self-contained corner of relativistic string theory. Within this corner, we realize manifestly SL(2,ℤ)-invariant (p, q)-string actions. The construction of these actions imposes a branching between strings of opposite charges associated with the two-form fields. The branch point is determined by these charges and the axion background field. Both branches must be incorporated in order to realize the full SL(2,ℤ) group. Besides these string actions, we also construct D-instanton and D3-brane actions that manifestly realize the branched SL(2,ℤ) symmetry.
Towards analytic structure of Feynman parameter integrals with rational curves
Authors: Gong Jianyu , Yuan Ellis Ye 
Published: October 2022

Abstract
We propose a strategy to study the analytic structure of Feynman parameter integrals where singularities of the integrand consist of rational irreducible components. At the core of this strategy is the identification of a selected stratum of discontinuities induced from the integral, together with a geometric method for computing their singularities on the principal sheet. For integrals that yield multiple polylogarithms we expect the data collected in this strategy to be sufficient for the construction of their symbols. We motivate this analysis by the Aomoto polylogarithms, and further check its validity and illustrate technical details using examples with quadric integrand singularities (which the one-loop Feynman integrals belong to). Generalizations to higher-loop integrals are commented at the end.
QED in $$ \overline{B} $$ → $$ \overline{K} $$ℓ+ℓ− LFU ratios: theory versus experiment, a Monte Carlo study
Authors: Isidori Gino , Lancierini Davide , Nabeebaccus Saad , Zwicky Roman 
Published: October 2022

Abstract
Using analytic results obtained in a meson effective theory, that includes all infrared sensitive logs, we build a dedicated Monte Carlo framework to describe QED corrections in $$ \overline{B} $$

B
¯

→$$ \overline{K} $$

K
¯

ℓ+ℓ− for a generic form factor. For the neutral mode $$ {\overline{B}}^0 $$

B
¯

0

→$$ {\overline{K}}^0 $$

K
¯

0

ℓ+ℓ−, we perform a detailed numerical comparison versus those obtained with the general-purpose photon-shower tool PHOTOS. The comparison indicates a good agreement, at the few per-mil level, when focusing on the rare mode only. In addition, our framework allows us to investigate the impact of the charmonium resonances. Interference effects, not described by PHOTOS in the experimental analysis, are found to be small in the dilepton invariant mass region q2< 6GeV2, which is used to determine $$ {R}_{K^{\left(\ast \right)}} $$

R

K

∗

. Using a semi-analytic framework we assess the full, rare and resonant, mode. Based thereupon, we discuss strategies to check the subtraction of the resonant mode, which has a sizeable impact at q2 ≈ 6GeV2 in the electron mode.
On the topological dynamics of automorphism groups: a model-theoretic perspective
Authors: Krupiński Krzysztof , Pillay Anand 
Published: October 2022

AbstractWe give a model-theoretic treatment of the fundamental results of Kechris-Pestov-Todorčević theory in the more general context of automorphism groups of not necessarily countable structures. One of the main points is a description of the universal ambit as a certain space of types in an expanded language. Using this, we recover results of Kechris et al. (Funct Anal 15:106–189, 2005), Moore (Fund Math 220:263–280, 2013), Ngyuen Van Thé (Fund Math 222: 19–47, 2013), in the context of automorphism groups of not necessarily countable structures, as well as Zucker (Trans Am Math Soc 368, 6715–6740, 2016).
Can PD-L1 expression be predicted by contrast-enhanced CT in patients with gastric adenocarcinoma? a preliminary retrospective study
Authors: Gu Xiaolong , Yu Xianbo , Shi Gaofeng , Li Yang , Yang Li 
Published: October 2022

Abstract
Background
This study aimed to construct a computed tomography (CT) radiomics model to predict programmed cell death-ligand 1 (PD-L1) expression in gastric adenocarcinoma patients using radiomics features.

Methods
A total of 169 patients with gastric adenocarcinoma were studied retrospectively and randomly divided into training and testing datasets. The clinical data of the patients were recorded. Radiomics features were extracted to construct a radiomics model. The random forest-based Boruta algorithm was used to screen the features of the training dataset. A receiver operating characteristic (ROC) curve was used to evaluate the predictive performance of the model.

Results
Four radiomics features were selected to construct a radiomics model. The radiomics signature showed good efficacy in predicting PD-L1 expression, with an area under the receiver operating characteristic curve (AUC) of 0.786 (p < 0.001), a sensitivity of 0.681, and a specificity of 0.826. The radiomics model achieved the greatest areas under the curve (AUCs) in the training dataset (AUC = 0.786) and testing dataset (AUC = 0.774). The calibration curves of the radiomics model showed great calibration performances outcomes in the training dataset and testing dataset. The net clinical benefit for the radiomics model was high.

Conclusion
CT radiomics has important value in predicting the expression of PD-L1 in patients with gastric adenocarcinoma.
Systematic study on nail plate assessment: differences in nail plate shape, thickness, power Doppler signal and scanning approach
Authors: Bellinato Francesco , Gisondi Paolo , Filippucci Emilio , Tozzi Francesca , Fassio Angelo , Adami Giovanni , Idolazzi Luca 
Published: October 2022

AbstractUltrasonography (US) of the nail is raising interest in the last years and its feasibility, quickness and amount of descriptive data may provide valuable information. Different authors presented several scanning approaches to nail complex in different pathological conditions, such as psoriasis, but no scanning protocol was ever proposed using healthy subjects as population of reference. The aim of the study was to establish a protocol for the US of nail plate and to assess whether the measurement of the nail plate is influenced by longitudinal vs transverse scan, sex, digit and hand dominance. Using high frequency probe and a Canon Aplio i800 machine, ultrasonographers took scans of nail plates of the hands from healthy subjects. Nail plate shape, thickness and power Doppler signal (PDUS) were evaluated and scans were taken both on longitudinal and transverse axis, at distal, middle and proximal portion of the nail plate or at a fixed angles of − 45°, 0° or + 45°. All the images were then revised and scored using a DICOM software, in order to allow good standards of accuracy and reproducibility. A total of 27 subjects (14 females and 13 males) were assessed. The measures did not result to differ in different portions or angles. Furthermore, no difference appears in sex or dominant vs not dominant hand. A decreasing and significant trend for nail plate thickness was found from the first to the fifth finger. Doppler signal was found in all but one subjects, with a range from almost absent to very evident. No difference was found between groups regarding PDUS. The data provided suggest that a proper scan protocol should include all the nails and evaluation should be done both on longitudinal and transverse axis. Since Doppler signal is highly variable in healthy subjects, its presence should be carefully considered as pathological finding. Observations provided by this study clarify important points of the scanning technique and solve doubts related to which nails should be scanned and where to evaluate quantitative parameters.
Influence of short-term face mask wear on semiautomatically measured tear film parameters in dry eye patients and healthy volunteers
Authors: Schargus Marc , Zimzik E. M. , Fuhrmann L. , Geerling G. 
Published: October 2022

AbstractPurposeThe use of face masks has been proposed to cause or exacerbate the symptoms of dry eye disease (DED), which has been widely discussed under the term mask-associated dry eye (MADE). However, no studies have systematically investigated tear film parameters during the use of different face masks. Therefore, the objective of the present study was to investigate clinically relevant parameters of the tear film before and during the short-time use of face masks in dry and normal eyes.MethodsIn a prospective study, the tear film parameters of 42 DED patients and 42 healthy volunteers were examined while wearing different types of face masks in a randomized order. This included measurements of non-invasive tear break-up time (NIBUT), lipid layer thickness, tear meniscus height, and bulbar redness after 30 min of wearing no mask, a surgical face mask or an FFP2/K95 mask. The equivalence of the means was assessed using the two one-sidedt-test (TOST) method.ResultsIn healthy volunteers’ lipid layer thickness, NIBUT and tear meniscus height were not significantly altered by 30 min of surgical or FFP2 mask wear (p > 0.016). The use of either type of mask was significantly associated with decreased bulbar redness (p < 0.001) in healthy eyes. In patients with DED, none of the tear film parameters or bulbar redness were significantly altered by 30 min of mask wear (p > 0.016).ConclusionsBased on these results, the short-term wearing of face masks, regardless of type, did not produce a significant difference in tear film parameters of lipid layer thickness, NIBUT, and tear meniscus in healthy or dry eyes, while bulbar redness was reduced after mask wear only in healthy volunteers.
Validation of a non-linear index of heart rate variability to determine aerobic and anaerobic thresholds during incremental cycling exercise in women
Authors: Schaffarczyk Marcelle , Rogers Bruce , Reer Rüdiger , Gronwald Thomas 
Published: October 2022

AbstractStudies highlight the usage of non-linear time series analysis of heart rate variability (HRV) using the short-term scaling exponent alpha1 of Detrended Fluctuation Analysis (DFA-alpha1) during exercise to determine aerobic and anaerobic thresholds. The present study aims to further verify this approach in women. Gas exchange and HRV data were collected from 26 female participants with different activity levels. Oxygen uptake (VO2) and heart rate (HR) at first (VT1) and second ventilatory thresholds (VT2) were compared with DFA-alpha1-based thresholds 0.75 (HRVT1) and 0.50 (HRVT2). Results: VO2 at VT1 and VT2 were 25.2 ml/kg/min (± 2.8) and 31.5 ml/kg/min (± 3.6) compared with 26.5 ml/kg/min (± 4.0) and 31.9 ml/kg/min (± 4.5) for HRVT1 and HRVT2, respectively (ICC3,1 = 0.77, 0.84; r = 0.81, 0.86, p < 0.001). The mean HR at VT1 was 147 bpm (± 15.6) and 167 bpm (± 12.7) for VT2, compared with 152 bpm (± 15.5) and 166 bpm (± 13.2) for HRVT1 and HRVT2, respectively (ICC3,1 = 0.87, 0.90; r = 0.87, 0.90, p < 0.001). Bland–Altman analysis for VT1 vs. HRVT1 showed a mean difference of − 1.3 ml/kg/min (± 2.4; LoA: 3.3, − 6.0 ml/kg/min) for VO2 and of − 4.7 bpm (± 7.8; LoA: 10.6, − 20.0 bpm) for HR. VT2 vs. HRVT2 showed a mean difference of − 0.4 ml/kg/min (± 2.3; LoA: 4.1, − 4.9 ml/kg/min) for VO2 and 0.5 bpm (± 5.7; LoA: 11.8, − 10.8 bpm) for HR. DFA-alpha1-based thresholds showed good agreement with traditionally used thresholds and could be used as an alternative approach for marking organismic transition zones for intensity distribution in women.
Effect of Heating and Cooling Rates on the Microstructure of a Double Soaked Medium-manganese Al-alloyed Steel
Authors: Kozłowska Aleksandra , Morawiec Mateusz , Petrov Roumen H. , Grajcar Adam 
Published: October 2022

AbstractThis contribution addresses the effect of heating and cooling rates on the microstructure of a double soaked medium-Mn 0.16C-5 Mn‑1.6Al‑0.2Si steel with an increased Al addition. The obtained results show that the differences in applied heating and cooling rates have a small effect on the microstructure of the investigated steel. Some differences in the dilatometer response during final cooling to room temperature were noted. Moreover, some changes in the fraction of retained austenite at particular heating/cooling variants were identified using the XRD method. Scanning electron microscopy (SEM), electron backscatter diffraction (EBSD), and dilatometry were applied to investigate microstructural changes, which occurred during second annealing step in the intercritical temperature range.
Incidence and risk factors for suicidal ideation in a sample of Chinese patients with mixed cancer types
Authors: Lai Qianlin , Huang Hong , Zhu Yinting , Shu Siwei , Chen Yaner , Luo Yuanyuan , Zhang Lili , Yang Zhihui 
Published: October 2022

Abstract
Purpose
Suicidal ideation (SI) is often overlooked as a risk factor for people with cancer. Because it is often a precursor for suicidal behavior, it is critical to identify and address SI in a timely manner. This study investigated SI incidence and risk factors in a cohort of Chinese patients with mixed cancer types.

Methods
Data from this cross-sectional study were collected from 588 patients receiving medical therapy for tumors at Nanfang Hospital and the Integrated Hospital of Traditional Chinese Medicine at Southern Medical University. SI was measured using the Self-rating Idea of Suicide Scale (SIOSS). Anxiety and depression were assessed using the Hospital Anxiety and Depression Scale (HADS). The Chinese version of the Demoralization Scale II (DS-II-C) was used to assess demoralization. Univariate and correlation analyses were used to identify correlative factors of SI and multiple stepwise linear regression analysis was used to characterize potential risk factors.

Results
SI was reported in 24.7% of participants and the SIOSS score was 14.00 (13.00, 15.00) in the SI group. Multiple linear regression results showed that demoralization, medical financial burden, cancer type, living condition, caretaker, working state, residence, gender, and marital status explained 32.1% of the SI in this cohort (F = 28.705, P < 0.001).

Conclusion
Approximately one-quarter of cancer patients in this study reported SI influenced by both external and internal factors. Characterizing these factors can be informative for prevention and treatment efforts.