bluuebunny/crossref_metadata_2025 huggingface dataset:
Brain-Derived Neurotrophic Factor rs6265 polymorphism is associated with severe cancer-related fatigue and neuropathic pain in female cancer survivors
Authors: Goto Taichi , Von Ah Diane , Li Xiaobai , Xiang Lichen , Kwiat Catherine , Nguyen Christopher , Hsiao Chao-Pin , Saligan Leorey N.
Published: July 2023

Purpose

This study examined the relationships between a single-nucleotide polymorphism (SNP) of brain-derived neurotrophic factor (BDNF) rs6265 and psychoneurological (PN) symptoms in female cancer survivors.

Methods

This secondary analysis examined 393 study participants. In addition to demographic variables, self-reported PN symptom scores (anxiety, bodily pain, depression, fatigue, neuropathic pain, and sleep disturbance) were collected using the Patient-Reported Outcomes Measurement Information System and 36-Item Short-Form Health Survey. Buccal swab samples were collected to obtain genotypes for BDNF rs6265 (Val/Val, Val/Met, or Met/Met). The PN symptom scores were compared across genotypes, and the relationships were examined using a regression model. We also explored correlations between different symptoms within each genotype.

Results

Participants with the Met/Met genotype reported significantly worse cancer-related fatigue and neuropathic pain, which was confirmed by rank-based regression analysis. In addition, cancer-related fatigue was correlated with other PN symptoms, particularly depression. These correlations were stronger in study participants with the Met/Met genotype than those with other genotypes.

Conclusion

Our study suggests that female cancer survivors with the Met/Met genotype of BDNF rs6265 are likely to experience worse cancer-related fatigue and neuropathic pain and that cancer-related fatigue is a good predictor of co-occurring PN symptoms in this population.

Implications for Cancer Survivors

Our findings advance the scientific community's understanding of cancer-related PN symptoms experienced by female cancer survivors, especially the unique role of BDNF rs6265 polymorphism in these symptoms. Our findings offer valuable insights for clinical practice that the symptom experience among female cancer survivors may vary based on BDNF genotypes.
New Exact Wave Solutions on the Complex Ginzburg–Landau Equation with Extended Rational Sin–Cos and Sinh–Cosh Method
Authors: Yang Fei , Lin Yuanjian
Published: July 2023

In this paper, a new complex waves representing solutions of the complex Ginzburg–Landau equation with Kerr law nonlinearity is investigated. we used the extended rational sin–cos and sinh–cosh function methods construct precise solutions to the nonlinear equation. Bright periodic solution, periodic solution, dark wave soliton solution of phenomena that occur in nonlinear optics or in plasma physics are obtained. The physical meaning of the geometrical structures for some solutions is discussed for different choices of the free parameters. The proposed method provides an important and effective mathematical tool to construct exact solutions according to different complex equations. The results present the dynamics properties of the different waves with different the 3D and contour plots.
Resonance Soliton, Breather and Interaction Solutions of the Modified Kadomtsev–Petviashvili-II Equation
Authors: Zhang Xueqing , Ren Bo
Published: July 2023

In this paper, we investigate the modified Kadomtsev–Petviashvili-II (mKP-II) equation, which has important applications in fluid dynamics, plasma physics and electrodynamics. By utilizing the Hirota bilinear method, the N-soliton solutions of the mKP-II equation are obtained. The resonance Y-type soliton, and the interaction between M-resonance Y-type solitons and P-resonance Y-type solitons are constructed by imposing some constraints to the parameters of the N-soliton solutions. Moreover, the novel type of double opening resonance Y-type soliton solutions are obtained by selecting some appropriate parameters in 3-soliton solutions. By making some conjugate assumptions in the parameters, the multiple breathers are presented. Furthermore, the hybrid solutions consisting of multiple breathers and resonance Y-type solitons are investigated. The dynamics of these hybrid solutions are analyzed using both numerical simulations and graphical methods.
Residential social vulnerability among healthcare personnel with and without severe acute respiratory coronavirus virus 2 (SARS-CoV-2) infection in Five US states, May–December 2020
Authors: Zlotorzynska Maria , Chea Nora , Eure Taniece , Alkis Ramirez Rebecca , Blazek Gregory T. , Czaja Christopher A. , Johnston Helen , Barter Devra , Kellogg Melissa , Emanuel Catherine , Lynfield Ruth , Fell Ashley , Lim Sarah , Lovett Sara , Phipps Erin C. , Shrum Davis Sarah , Sievers Marla , Dumyati Ghinwa , Concannon Cathleen , Myers Christopher , McCullough Kathryn , Woods Amy , Hurley Christine , Licherdell Erin , Pierce Rebecca , Ocampo Valerie L.S. , Hall Eric , Magill Shelley S. , Grigg Cheri T.
Published: July 2023

Objective:

To characterize residential social vulnerability among healthcare personnel (HCP) and evaluate its association with severe acute respiratory coronavirus virus 2 (SARS-CoV-2) infection.

Design:

Case–control study.

Setting:

This study analyzed data collected in May–December 2020 through sentinel and population-based surveillance in healthcare facilities in Colorado, Minnesota, New Mexico, New York, and Oregon.

Participants:

Data from 2,168 HCP (1,571 cases and 597 controls from the same facilities) were analyzed.

Methods:

HCP residential addresses were linked to the social vulnerability index (SVI) at the census tract level, which represents a ranking of community vulnerability to emergencies based on 15 US Census variables. The primary outcome was SARS-CoV-2 infection, confirmed by positive antigen or real-time reverse-transcriptase– polymerase chain reaction (RT-PCR) test on nasopharyngeal swab. Significant differences by SVI in participant characteristics were assessed using the Fisher exact test. Adjusted odds ratios (aOR) with 95% confidence intervals (CIs) for associations between case status and SVI, controlling for HCP role and patient care activities, were estimated using logistic regression.

Results:

Significantly higher proportions of certified nursing assistants (48.0%) and medical assistants (44.1%) resided in high SVI census tracts, compared to registered nurses (15.9%) and physicians (11.6%). HCP cases were more likely than controls to live in high SVI census tracts (aOR, 1.76; 95% CI, 1.37–2.26).

Conclusions:

These findings suggest that residing in more socially vulnerable census tracts may be associated with SARS-CoV-2 infection risk among HCP and that residential vulnerability differs by HCP role. Efforts to safeguard the US healthcare workforce and advance health equity should address the social determinants that drive racial, ethnic, and socioeconomic health disparities.
Music teaching in primary schools of Albacete, Spain, during the COVID-19 pandemic
Authors: Bravo Marín Raquel , López García Narciso José , Mateo Gómez Alonso
Published: July 2023

The role, functions and duties of teachers have dramatically changed with the COVID-19 pandemic. This sudden change has posed enormous challenges for schools, students and teachers. This article deals with the situation of music teaching in the Spanish province of Albacete (Castilla-La Mancha)1 in the first two terms of the course 2020–2021 through face-to-face lessons. A questionnaire, created on music teaching in elementary schools, was answered by 96 teachers, teaching an amount of 35,365 primary education pupils in Albacete. The results of this research show that the everyday teaching has experienced relevant changes, especially in instrumental practice.
Identification of post-COVID-19 condition phenotypes, and differences in health-related quality of life and healthcare use: a cluster analysis
Authors: Gerritzen Iris , Brus Iris M. , Spronk Inge , Biere-Rafi Sara , Polinder Suzanne , Haagsma Juanita A.
Published: July 2023

The aim of this cross-sectional study was to identify post-COVID-19 condition (PCC) phenotypes and to investigate the health-related quality of life (HRQoL) and healthcare use per phenotype. We administered a questionnaire to a cohort of PCC patients that included items on socio-demographics, medical characteristics, health symptoms, healthcare use, and the EQ-5D-5L. A principal component analysis (PCA) of PCC symptoms was performed to identify symptom patterns. K-means clustering was used to identify phenotypes. In total, 8630 participants completed the survey. The median number of symptoms was 18, with the top 3 being fatigue, concentration problems, and decreased physical condition. Eight symptom patterns and three phenotypes were identified. Phenotype 1 comprised participants with a lower-than-average number of symptoms, phenotype 2 with an average number of symptoms, and phenotype 3 with a higher-than-average number of symptoms. Compared to participants in phenotypes 1 and 2, those in phenotype 3 consulted significantly more healthcare providers (median 4, 6, and 7, respectively, p < 0.001) and had a significantly worse HRQoL (p < 0.001). In conclusion, number of symptoms rather than type of symptom was the driver in the identification of PCC phenotypes. Experiencing a higher number of symptoms is associated with a lower HRQoL and more healthcare use.
Cardiac magnetic resonance predictors for successful primary biventricular repair of unbalanced complete common atrioventricular canal
Authors: Jones Andrea L. , White Brian R. , Ghosh Reena M. , Mondal Antara , Ampah Steve , Ho Deborah Y. , Whitehead Kevin , Harris Matthew A. , Biko David M. , Partington Sara , Fuller Stephanie , Cohen Meryl S. , Fogel Mark A.
Published: July 2023

Background:

Patients with unbalanced common atrioventricular canal can be difficult to manage. Surgical planning often depends on pre-operative echocardiographic measurements. We aimed to determine the added utility of cardiac MRI in predicting successful biventricular repair in common atrioventricular canal.

Methods:

We conducted a retrospective cohort study of children with common atrioventricular canal who underwent MRI prior to repair. Associations between MRI and echocardiographic measures and surgical outcome were tested using logistic regression, and models were compared using area under the receiver operator characteristic curve.

Results:

We included 28 patients (median age at MRI: 5.2 months). The optimal MRI model included the novel end-diastolic volume index (using the ratio of left ventricular end-diastolic volume to total end-diastolic volume) and the left ventricle–right ventricle angle in diastole (area under the curve 0.83, p = 0.041). End-diastolic volume index ≤ 0.18 and left ventricle–right ventricle angle in diastole ≤ 72° yield a sensitivity of 83% and specificity of 81% for successful biventricular repair. The optimal multimodality model included the end-diastolic volume index and the echocardiographic atrioventricular valve index with an area under the curve of 0.87 (p = 0.026).

Conclusions:

Cardiac MRI can successfully predict successful biventricular repair in patients with unbalanced common atrioventricular canal utilising the end-diastolic volume index alone or in combination with the MRI left ventricle–right ventricle angle in diastole or the echocardiographic atrioventricular valve index. A prospective cardiac MRI study is warranted to better define the multimodality characteristic predictive of successful biventricular surgery.
Obstacles to Federal Policy Adoption: The Case of Special Domestic Violence Criminal Jurisdictions in Native American Tribal Nations
Authors: Sidorsky Kaitlin N. , Schiller Wendy J.
Published: July 2023

A core tenet of representation is that individuals should expect government to actively protect their human security. In the issue area of domestic violence in the United States, government largely fails to do this for women, who comprise three-quarters of all victims of domestic violence. Nowhere is this more apparent than for Native American women living on tribal lands. In terms of lifetime physical violence, nearly 52% of Native American women will be physically abused compared to 30.5% of white women, 41.2% of African American women, and 29.7% of Hispanic women (Crepelle 2020; Institute for Women’s Policy Research 2023). One of the main obstacles to keeping Native American women safer is that tribal nations have been functionally prohibited from prosecuting non-Native offenders of violence against Native Americans on their lands. Non-Native offenders comprise the bulk of domestic violence abusers in these communities. To address this inequity, the 2013 Violence Against Women Act (VAWA) created Special Domestic Violence Criminal Jurisdictions (SDVCJs). Through an application process, federally recognized tribal nations can create these jurisdictions to provide justice for the many women who are victims of domestic violence at the hands of non-Native persons. In this article we explore which tribal nations created these jurisdictions using an original dataset of the 354 tribal nations that were eligible to adopt an SDVCJ following the 2013 VAWA reauthorization. As of 2022, 31 tribal nations have adopted SDVCJs across 13 states, which have led to 74 domestic violence convictions. In this article, we explain adoption of these courts as a function of population, tribal nation fiscal capacity, federal grant support, and having an existing self-governance compact with the Bureau of Indian Affairs.
Joint Bayesian Modeling of Velocity Break Points, Noise Characteristics, and Their Uncertainties in GNSS Time Series: Far‐Field Velocity Anomalies Concurrent With Magmatic Activity in Iceland
Authors: Yang Yilin , Sigmundsson Freysteinn , Geirsson Halldór
Published: July 2023

Estimating the timing of velocity changes (break points) in Global Navigation Satellite System (GNSS) coordinate time series is required for understanding various Earth processes and how they may couple with each other. We jointly estimate break points, noise parameters and their uncertainties in GNSS time series using Bayesian interference. Synthetic data experiments demonstrate that time‐correlated noise can cause spurious estimates of break points for small velocity change and suggest the lower limits of velocity change for reliable estimates. A case study at the Krafla volcanic system shows increased rift‐perpendicular movementof 7.6–9.8 mm/yr, preceding by 23–77 days the 2014 Bárðarbunga rifting episode that occurred ∼120 km to the south (maximum likelihood estimates). These far‐field velocity anomalies occur in the same period as enhanced near‐field seismicity and deformation before the dike intrusion at Bárðarbunga, possibly indicating the coupling between the two volcanic systems through a deep partial melt zone.
Multidisciplinary Analysis of the Nippur Sulcus Region on Ganymede
Authors: Tosi Federico , Galluzzi Valentina , Lucchetti Alice , Orosei Roberto , Filacchione Gianrico , Zambon Francesca , Cremonese Gabriele , Palumbo Pasquale , Piccioni Giuseppe
Published: July 2023

On Jupiter's largest moon Ganymede, we focus on the southern region of Nippur Sulcus, including the Epigeus palimpsest crater. This region displays geologically recent terrains and has good coverage of optical and near infrared remote sensing data, primarily returned by the NASA Galileo mission. We first use high‐resolution optical imagery to carry out a detailed geological mapping. We combine hyperspectral data to infer the surface composition of this area. We then apply two theoretical models. The first is a self‐similar clustering that uses the mapping of the grooves present in this region to infer the thickness of the ice shell. A second model is used to estimate the radar clutter noise induced by the estimated local topography, which is key for constraining future radar measurements. Based on all findings, we provide a possible evolutionary history of the Nippur Sulcus and Epigeus areas. This exercise shows the potential of an interdisciplinary data analysis combining wide‐ranging scientific objectives such as geology, surface composition, and geophysics in view of the future close exploration that will be conducted on Ganymede by the JUICE spacecraft. Our work combines multiple analysis techniques that could be applied to other regions of interest and will prove crucial when JUICE data become available.
Marine records reveal multiple phases of Toba’s last volcanic activity
Authors: Caron B. , Del Manzo G. , Villemant B. , Bartolini A. , Moreno E. , Le Friant A. , Bassinot F. , Baudin F. , Alves A.
Published: July 2023

The Indonesian Young Toba Tuff (YTT), classically dated around 74 ka BP, is considered as a short-lived explosive cataclysmic super-eruption. The huge amounts of ash and SO2 emitted are likely to have triggered a volcanic winter which accelerated the transition to the last glaciation, and may have induced a human genetic bottleneck. However, the global climatic impact of the YTT or its duration are hotly debated. The present work offers a new interpretation of the Toba volcanic complex eruptive history. Analysing the BAR94-25 marine core proximal to the Toba volcanic center and combining it with high-resolution tephrostratigraphy and δ18O stratigraphy, we show that the Toba complex produced a volcanic succession that consists of at least 17 distinct layers of tephra and cryptotephra. Textural and geochemical analyses show that the tephra layers can be divided in 3 main successive volcanic activity phases (VAP1 to VAP3) over a period of ~ 50 kyr. The main volcanic activity phase, VAP2, including the YTT, is likely composed of 6 eruptive events in an interval whose total duration is ~ 10 ka. Thus, we suggest that the eruptive model of the Toba volcano must be revised as the duration of the Toba volcanic activity was much longer than suggested by previous studies. The implications of re-estimating the emission rate and the dispersion of ashes and SO2 include global environmental reconstitutions, climate change modelling and possibly human migration and evolution.
Robust and highly emissive copper(i) halide 1D-coordination polymers with triphenylarsine and a series of bridging N-heteroaromatic co-ligands
Authors: Kikuchi Kazuma , Imoto Hiroaki , Naka Kensuke
Published: July 2023

Dinuclear rhombic copper halide and triphenylarsine formed one-dimensional coordination polymers using various bidentate N-heteroaromatic co-ligands. They emitted light efficiently, in various colors, and were resistant to mechanical stress.
Impact of ligand chlorination and counterion tuning on high-field spin relaxation in a series of V(iv) complexes
Authors: Martinez Roxanna , Jackson Cassidy E. , Üngör Ökten , van Tol Johan , Zadrozny Joseph M.
Published: July 2023

Ligand chlorination and R3NH+ counterion tuning of the V(iv) complexes [V(C6H4O2)3]2−was performed to explore the role of the magnetic nuclei in these species on the spin dynamics of the V(iv) ion.
Base-promoted synthesis of dihydrochromeno[4,3-d]pyrrolo[3,4-b]pyridines from 4-chloro-3-substituted coumarins and α-aminomaleimides
Authors: Alizadeh Abdolali , Rostampoor Azar
Published: July 2023

A series of dihydrochromeno[3,4-d]pyrrolo[3,4-b]pyridines have been synthesized in excellent yields (41–92%) through reaction of 4-chloro-3-substituted coumarins with α-aminomaleimides.
Abrupt onset of the capillary-wave spectrum at wall–fluid interfaces
Authors: Parry Andrew O. , Rascón Carlos
Published: July 2023

Surface phase diagrams showing lines of critical wetting (blue) and first-order wetting (red), and the regions of the phase diagram where the decay of the density-density correlation function is 2D-like (light blue) and 3D-like (green).
Autonomous Planning and Robust Control for Wheeled Mobile Robot With Slippage Disturbances Based on Differential Flat
Authors: Liu Yueyue , Bai Keqiang , Wang Haoyu , Fan Qigao
Published: July 2023

This paper proposes a wheeled mobile robot (WMR) robust control scheme. The feasible strategy is developed to achieve an efficient and robust autonomous mobile robot motion. To realize kinematic autonomous planning and control of the WMR, a novel controller is designed based on control Lyapunov function. This part can be divided into the following two aspects: 1) considering the nonholonomic constraints in the autonomous mobile robot trajectory tracking, a dynamic feedback‐linearization is adopted by utilizing differential flatness‐based integrated control framework to achieve full‐state controllability; 2) to compensate the structured uncertainties and slippage disturbances related to the robot kinematic model, a robust controller is designed based on control Lyapunov function with quadratic programming. Such a strategy can achieve autonomous motion even with unknown slippage disturbances subject to various constraints. Moreover, the sufficient condition is also analyzed to ensure the WMR system exponential stability. The effectiveness and performance of the proposed method are verified by numerical simulation.
The stellar halo in Local Group Hestia simulations
Authors: Khoperskov Sergey , Minchev Ivan , Libeskind Noam , Belokurov Vasily , Steinmetz Matthias , Gomez Facundo A. , Grand Robert J. J. , Hoffman Yehuda , Knebe Alexander , Sorce Jenny G. , Spaare Martin , Tempel Elmo , Vogelsberger Mark
Published: July 2023

Stellar chemical abundances and kinematics provide key information for recovering the assembly history of galaxies. In this work we explore the chemo-chrono-kinematics of accreted and in situ stellar populations, by analyzing six M31/Milky Way (MW) analogues from the HESTIA suite of cosmological hydrodynamics zoom-in simulations of the Local Group. We show that elemental abundances ([Fe/H], [Mg/Fe]) of merger debris in the stellar haloes are chemically distinct from the survived dwarf galaxies, in that they are [α/Fe]-enhanced and have lower metallicity in the same stellar mass range. Therefore, mergers debris have abundances expected for stars originating from dwarfs that had their star formation activity quenched at early times. Accreted stellar haloes, including individual debris, reveal [Fe/H] and [Mg/Fe] gradients in theE − Lzplane, with the most metal-rich, [α/Fe]-poor stars, which have formed in the inner parts of the disrupted systems before the merger, contributing mainly to the central regions of the host galaxies. This results in negative metallicity gradients in the accreted components of stellar haloes atz = 0, seen also for the individual merger debris. We suggest, therefore, that abundance measurements of halo stars in the inner MW will allow constraining better the parameters, such as the mass and merger time, of MW’s most massive merger Gaia-Sausage-Enceladus. The metallicity distribution functions (MDFs) of the individual debris show several peaks and the majority of debris have lower metallicity than the in situ stars in the prograde part of theE − Lzspace. At the same time, non-rotating and retrograde accreted populations are very similar to the in situ stars in terms of [Fe/H] abundance. Prograde accreted stars show a prominent knee in the [Fe/H]–[Mg/Fe] plane, reaching up to solar [Mg/Fe], while retrograde stars typically contribute to the high-[Mg/Fe] sequence only. We find that the most metal-poor stars ([Fe/H] ≲ −1) of the HESTIA galaxies exhibit net rotation up to 80 km s−1, which is consistent with the Aurora population recently identified in the MW. At higher metallicities ([Fe/H] ≈ −0.5 ± 0.1) we detect a sharp transition (spin-up) from the turbulent phase to a regular disk-like rotation. Different merger debris appear similar in the [Fe/H]–[Mg/Fe] plane, thus making it difficult to identify individual events. However, combining a set of abundances, and especially stellar age, makes it possible to distinguish between different debris.
Uncovering new white dwarf–open cluster associations using Gaia DR3
Authors: Prišegen M. , Faltová N.
Published: July 2023

Context. Open clusters (OCs) provide homogeneous samples of white dwarfs (WDs) with known distances, extinctions, and total ages. The unprecedented astrometric precision of Gaia allows us to identify many novel OC–WD pairs. Studying WDs in the context of their parent OCs makes it possible to determine the properties of WD progenitors and study the initial–final mass relation (IFMR).

Aims. We seek to find potential new WD members of OCs in the solar vicinity. The analysis of OC members’ parallaxes allows us to determine the OC distances to a high precision, which in turn enables us to calculate WD masses and cooling ages and to constrain the IFMR.

Methods. We searched for new potential WD members of nearby OCs using the density-based machine learning clustering algorithm HDBSCAN. The clustering analysis was applied in five astrometric dimensions – positions in the sky, proper motions and parallaxes, and in three dimensions where the positional information was not considered in the clustering analysis. The identified candidate OC WDs were further filtered using the photometric criteria and properties of their putative host OCs. The masses and cooling ages of the WDs were calculated via a photometric method using all available Gaia, Pan-STARRS, SDSS, and GALEX photometry. The WD progenitor masses were determined using the ages and metallicities of their host OCs.

Results. Altogether, 63 OC WD candidates were recovered, 27 of which are already known in the literature. We provide characterization for 36 novel WDs that have significant OC membership probabilities. Six of them fall into relatively unconstrained sections of the IFMR where the relation seems to exhibit nonlinear behavior. We were not able to identify any WDs originating from massive progenitors that would even remotely approach the widely adopted WD progenitor mass limit of 8 M⊙; this confirms the paucity of such objects residing in OCs and hints at a presence of velocity kicks for nascent WDs.
Theoretical and experimental research on the joint control mechanism of the roll gap in large diameter ratio rolling mill
Authors: Yang Tingsong , Yuan Tieheng , Sun Wenquan , Zheng Yi , He Anrui
Published: July 2023

To adjust the roll gap shape in the large diameter ratio rolling mill, this paper proposes a new mechanism for controlling the roll gap of the large diameter ratio rolling mill, based on the principle of working roll bending technology (WRB) and roll profile electromagnetic control technology (RPECT). According to the principle of the mechanism, it can be called WRB-RPECT joint control mechanism. To analyze the roll gap shape control ability of this mechanism, a joint finite element model of the large diameter ratio roll system with the electromagnetic control roll (ECR) is established, and verified by the rolling experiment in the Y-type electromagnetic control rolling mill. Based on the finite element model, the loaded characteristic of the working rolls, the contact stress between rolls, the transverse thickness distribution of strip and the adjustment range of roll gap crown are analyzed for different rolling forces and different WRB-RPECT joint control mechanisms. The results show that the WRB-RPECT joint control mechanism has certain roll gap shape control ability of the large diameter ratio rolling, and can achieve the roll gap control goal of uniform transverse size distribution.
Pricing and inventory decision in a two-layer supply chain under the Weibull distribution product deterioration: an application of NSGA-II
Authors: Barman Abhijit , Kumar Chakraborty Ashis , Goswami Adrijit , Banerjee Parthasarathi , De Pijus Kanti
Published: July 2023

Academicians and practitioners have focused a lot of attention on the separate issues of pricing and inventory control in a competitive setting. However, integrating these choices in a competitive environment has received scant attention for deteriorating inventory systems from academics despite being crucial to practitioners. From this perspective, our research focuses on designing a supply chain model with inventory coordination to reflect time systems with improved accuracy and optimal control systems. In this research, we develop a two-layer supply chain model consisting of one manufacturer and one retailer incorporating the inventory classification of the retailer. Price-sensitive market demand and two-parameter time-varying Weibull distribution deterioration have been assumed to develop the mathematical model. First, a collective decision on price and inventory control of a deteriorating product has been evaluated in a duopoly environment. Secondly, to explore the decentralized scenario, we have proposed the NSGA-II algorithm to solve the bi-objective programming problem of the two-layer supply chain. The paper aims to explore product collaborative pricing policies and the inventory decision of the deteriorating item in two-layer supply chain coordination. Finally, numerical research is conducted to execute the centralized supply chain and NSGA-II application in a decentralized supply chain. The research findings can provide valuable insights for members of the two-layer supply chain to make optimal product pricing and inventory scheduling decisions.
Chronische Rückenschmerzen
Authors: Maschke Matthias , Diener Hans-Christoph
Published: July 2023

Chronische Rückenschmerzen gehören zu den häufigsten
Erkrankungen in Deutschland. Vielfach findet sich keine morphologisch fassbare
Veränderung, sodass die Genese bei über 90% der
Patienten unspezifisch bleibt. Der vorliegende Artikel soll eine
Übersicht über die medikamentöse Therapie wie auch die
nicht-medikamentösen Maßnahmen geben und fasst die
entsprechenden Leitlinienempfehlungen zusammen.
Dynamic modelling and chaos control for a thin plate oscillator using Bubnov–Galerkin integral method
Authors: Jiao 焦 Xiaodong 晓东 , Wang 王 Xinyu 新宇 , Tao 陶 Jin 金 , Sun 孙 Hao 昊 , Sun 孙 Qinglin 青林 , Chen 陈 Zengqiang 增强
Published: July 2023

The utilization of thin plate systems based on acoustic vibration holds significant importance in micro-nano manipulation and the exploration of nonlinear science. This paper focuses on the analysis of an actual thin plate system driven by acoustic wave signals. By combining the mechanical analysis of thin plate microelements with the Bubnov–Galerkin integral method, the governing equation for the forced vibration of a square thin plate is derived. Notably, the reaction force of the thin plate vibration system is defined as f = α|w|, resembling Hooke’s law. The energy function and energy level curve of the system are also analyzed. Subsequently, the amplitude–frequency response function of the thin plate oscillator is solved using the harmonic balance method. Through numerical simulations, the amplitude–frequency curves are analyzed for different vibration modes under the influence of various parameters. Furthermore, the paper demonstrates the occurrence of conservative chaotic motions in the thin plate oscillator using theoretical and numerical methods. Dynamics maps illustrating the system’s states are presented to reveal the evolution laws of the system. By exploring the effects of force fields and system energy, the underlying mechanism of chaos is interpreted. Additionally, the phenomenon of chaos in the oscillator can be controlled through the method of velocity and displacement states feedback, which holds significance for engineering applications.
The Lévy walk with rests under stochastic resetting
Authors: Liu Jian , Hu Yuhang , Bao Jing-Dong
Published: July 2023

The Lévy walk with rests (LWR) model is a typical two-state stochastic process that has been widely and successfully adopted in the study of intermittent stochastic phenomena in physical and biological systems. Stochastic processes under resetting provide treatable and interesting schemes to study foraging and search strategies. In this manuscript, we focus on the anomalous diffusive behavior of the LWR under stochastic resetting. We consider both the case of instantaneous resetting, in which the particle stochastically returns to a given position immediately, and the case of noninstantaneous resetting, in which the particle returns to a given position with a finite velocity. The anomalous diffusive behaviors are analyzed and discussed by calculating the mean squared displacement analytically and numerically. Results reveal that the stochastic resetting can not only hinder the diffusion, where the diffusion evolves toward a saturation state, but also enhances it, where as compared with the LWR without resetting, the diffusion exponent surprisingly increases. As far as we know, the enhancement effect caused by stochastic resetting has not yet been reported. In addition, the resetting time probability density function (PDF) of the instantaneous resetting and the return time PDF of the noninstantaneous resetting are studied. Results reveal that the resetting time PDF could follow a power law provided that the sojourn time PDF is power-law distributed and the sojourn time with a heavier tail plays a decisive role in determining the resetting time PDF, whereas the shape of the return time PDF is determined by not only by the sojourn time PDF, but also by the return manner.
Recent Developments of Natural Fibres: Natural Fibre Biocomposites, Treatments, and Characterizations
Authors: Cagrı Uyanik M. , Tamer Erturk A.
Published: July 2023

Natural fibres are highly desirable in composites as they are renewable, biodegradable, and cost-effective. They are also abundant in nature with many different types available all over the world. However, despite their advantages, key challenges such as poor fibre-matrix interfacial bonding and moisture absorption limit their widespread adoption in more sophisticated applications. This article provides an overview of natural fibres, including classifications, types, properties, advantages, and disadvantages, with a subsequent review of recent studies, focusing on fibre-matrix selection, treatment methods, and characterization to better understand the current situation. It is apparent from these studies that water absorption is a significant challenge due to the inherent hydrophilic nature of natural fibres as even after treatments like mercerization and silane were applied, substantial amounts of absorption were observed. The effects of powder fillers also vary, with beneficial effects up to a certain proportion, beyond which they became detrimental.
Design of Injection Mould for Lithium Battery Heat Dissipation Device Connector Bottom Cover
Authors: Zhang Heli , Fei Qiang , Jin Biao
Published: July 2023

The design process of the injection mould for the Lithium battery heat dissipation device connector bottom cover is described in detail. In the design process, the UG software is used to establish the three-dimensional model of the plastic part, and the mould flow analysis is carried out with the help of the moldflow software to determine the optimal gate position of the plastic part. By determining the injection process parameters of Lithium battery heat dissipation device connector bottom cover material, the design of the cavity layout of the plastic part is completed, and the basic size and mould structure of the mould base are determined. Then, the UG injection mould design guide module was used to carry out the parting design, and the structural design of the mould’s gating system, molding parts, lateral parting mechanism, core-pulling mechanism, ejection mechanism, exhaust system and cooling system was completed in turn. The whole design process improved the efficiency of mould design and saved a lot of time and cost.
Experimental Investigation on the Effects of PODEn Addition on Combustion Characteristics of a Diesel Engine
Authors: Zhao Yuwei , Li Ting , Cheng Peiyuan , Cheng Yuemeng , Zheng Wenxiu
Published: July 2023

Experimental tests were conducted to study the effects of PODEn (Polyoxymethy-lene dimethyl ethers) addition on the combustion characteristics and economy of a Yunnei Power 2102QB engine. The alternative fuel PODEn were blended with 0# diesel with mass fractions of 10%, 20%, 30%, and 50%, respectively. Results showed that as the PODEn concentration increased, the in-cylinder pressure curves of diesel/PODEn blends moved forward, the ignition delay time decreased, and the peak value of the in-cylinder pressure decreased gradually. The brake thermal efficiency of P10D90 and P20D80 were higher than that of D100, with a maximum increase of 2.1%. The brake specific fuel consumption raised and the brake thermal efficiency reduced when the PODEn blending ratio was at a high level (≥30%). Blending PODEn with low proportion can improve the combustion process and economy of 2102QB diesel engine.
Simulation of Brittle Materials Based on Ordinary State-based Peridynamics
Authors: Zhou Ji , Qian Songrong
Published: July 2023

We present a coupled model for brittle materials based on the ordinary state-based peridynamics. The ordinary state-based peridynamics theory is suitable for describing the plastic incompressibility problem and has good application prospects in the fracture damage simulation of brittle materials. The brittle material is a material with a compressive load-bearing capacity greater than the tensile load-bearing capacity and has the characteristics of incompressibility, which is consistent with the application scope of ordinary state-based peridynamics. The mechanical behavior of brittle materials is simulated and analyzed using the ordinary state-based peridynamics theory coupled with brittle materials, and the validity of the model is verified using the finite element method. The results show that the model can effectively capture the displacement field distribution of the brittle material, and the comparison of the finite element results displacement field is consistent. Finally, crack extension analysis is performed on the brittle material plate with prefabricated defects, where the cracks extend along the defect location, bifurcate, and finally penetrate the upper and lower surfaces of the material. The results show that the model can effectively predict the crack expansion path of the material, which provides a new research idea for the simulation of crack expansion in brittle materials.
Robust Optimization of Chemical Networks Based on Dynamic Nonlinear Load Capacity Model
Authors: Liu Ruijie , Wang Zheng , Dong Ran , Li Huapeng , Hou Jingmin , Dong Zhaofei , Xie Tongtong
Published: July 2023

In the research on the robustness of chemical network, predecessors described the robustness of chemical network by establishing a cascade failure model, and then optimized the robustness. However, in the previous research, it was mainly static, without considering the network dynamics formed by the complex internal structure and strong correlation between variables of chemical network. At the same time, the previous research mainly focuses on static and does not consider the network dynamics formed by the complex internal structure of the chemical network and the strong correlation between variables. Therefore, this paper considers the dynamic characteristics of the actual chemical process system network, establishes a dynamic cascade failure model based on a nonlinear model of load capacity, and proposes a target node protection strategy to protect specific target nodes for robust optimization after considering the influence of specific nodes on neighboring nodes, which reduces the failure probability after the network suffers a failure and provides a It provides a theoretical basis for improving the cascade failure resistance of chemical networks.
Fault diagnosis of Rolling Bearing for Motor Based on LSTM-EEMD and Genetic Optimization
Authors: Li Zheyuan , Cai Shulin , Li Xiaoquan , Shao Siyu , Yang Xinyu
Published: July 2023

In the process of ensemble empirical mode decomposition (EEMD) for motor rolling bearing time series, if the classifier is trained directly using the eigenvalues extracted from the pattern components, there are two shortcomings leading to the reduction of fault identification accuracy as follows: decomposition has serious endpoint effects; the correlation between extracted features lead to the confusion of the fault feature vector classification boundary. Aiming at the problems, in this paper, a fault diagnosis model was built. Firstly, LSTM is used to extend the original data to reduce the divergence degree of the endpoint. Secondly, correlation analysis and dimensionality reduction were carried out for the extracted features to reduce the feature dimension. Finally, the eigenvalues were weighted and genetically optimized to enhance the boundary of different eigenvectors. The experimental results validated by data sets showed that the accuracy of fault diagnosis would be improved by using LSTM extension and genetic optimization feature vector.
The use of the World Guidelines for Falls Prevention and Management’s risk stratification algorithm in predicting falls in The Irish Longitudinal Study on Ageing (TILDA)
Authors: Hartley Peter , Forsyth Faye , Rowbotham Scott , Briggs Robert , Kenny Rose Anne , Romero-Ortuno Roman
Published: July 2023

Background

the aim of this study was to retrospectively operationalise the World Guidelines for Falls Prevention and Management (WGFPM) falls risk stratification algorithm using data from The Irish Longitudinal Study on Ageing (TILDA). We described how easy the algorithm was to operationalise in TILDA and determined its utility in predicting falls in this population.

Methods

participants aged ≥50 years were stratified as ‘low risk’, ‘intermediate’ or ‘high risk’ as per WGFPM stratification based on their Wave 1 TILDA assessments. Groups were compared for number of falls, number of people who experienced one or more falls and number of people who experienced an injury when falling between Wave 1 and Wave 2 (approximately 2 years).

Results

5,882 participants were included in the study; 4,521, 42 and 1,309 were classified as low, intermediate and high risk, respectively, and 10 participants could not be categorised due to missing data. At Wave 2, 17.4%, 43.8% and 40.5% of low-, intermediate- and high-risk groups reported having fallen, and 7.1%, 18.8% and 18.7%, respectively, reported having sustained an injury from falling.

Conclusion

the implementation of the WGFPM risk assessment algorithm was feasible in TILDA and successfully differentiated those at greater risk of falling. The high number of participants classified in the low-risk group and lack of differences between the intermediate and high-risk groups may be related to the non-clinical nature of the TILDA sample, and further study in other samples is warranted.
Wave damping by giant kelp, Macrocystis pyrifera
Authors: Elsmore Kristen , Nickols Kerry J , Miller Luke P , Ford Tom , Denny Mark W , Gaylord Brian
Published: July 2023

Background and Aims

The increased likelihood and severity of storm events has brought into focus the role of coastal ecosystems in provision of shoreline protection by attenuating wave energy. Canopy-forming kelps, including giant kelp (Macrocystis pyrifera), are thought to provide this ecosystem service, but supporting data are extremely limited. Previous in situ examinations relied mostly on comparisons between nominally similar sites with and without kelp. Given that other factors (especially seafloor bathymetry and topographic features) often differ across sites, efforts to isolate the effects of kelp on wave energy propagation confront challenges. In particular, it can be difficult to distinguish wave energy dissipation attributable to kelp from frictional processes at the seabed that often covary with the presence of kelp. Here, we use an ecological transition from no kelp to a full forest, at a single site with static bathymetry, to resolve unambiguously the capacity of giant kelp to damp waves.

Methods

We measured waves within and outside rocky reef habitat, in both the absence and the presence of giant kelp, at Marguerite Reef, Palos Verdes, CA, USA. Nested within a broader kelp restoration project, this site transitioned from a bare state to one supporting a fully formed forest (density of 8 stipes m−2). We quantified, as a function of incident wave conditions, the decline in wave energy flux attributable to the presence of kelp, as waves propagated from outside and into reef habitat.

Key Results

The kelp forest damped wave energy detectably, but to a modest extent. Interactions with the seabed alone reduced wave energy flux, on average, by 12 ± 1.4 % over 180 m of travel. The kelp forest induced an additional 7 ± 1.2 % decrease. Kelp-associated declines in wave energy flux were slightly greater for waves of longer periods and smaller wave heights.

Conclusions

Macrocystis pyrifera forests have a limited, albeit measurable, capacity to enhance shoreline protection from nearshore waves. Expectations that giant kelp forests, whether extant or enhanced through restoration, have substantial impacts on wave-induced coastal erosion might require re-evaluation.
Trends and outcomes of concomitant aortic valve replacement and coronary artery bypass grafting in the UK and a survey of practices
Authors: Fudulu Daniel P , Layton Georgia R , Nguyen Bao , Sinha Shubhra , Dimagli Arnaldo , Guida Gustavo , Abbasciano Riccardo , Viviano Alessandro , Angelini Gianni D , Zakkar Mustafa
Published: July 2023

OBJECTIVES

Concomitant revascularization of coronary artery disease at the same time as treatment for aortic valvopathy favourably impacts survival. However, combined surgery may be associated with increased adverse outcomes compared to aortic valve replacement (AVR) or coronary artery bypass grafting in isolation.

METHODS

We retrospectively analyzed all patients who underwent AVR with bypass grafting between February 1996 and March 2019 using data from the National Adult Cardiac Surgery Audit. We used a generalized mixed-effects model to assess the effect of the number and type of bypass grafts associated with surgical AVR on in-hospital mortality, postoperative stroke, and the need for renal dialysis. Furthermore, we conducted an international cross-sectional survey of cardiac surgeons to explore their views about concomitant AVR with coronary bypass grafting interventions.

RESULTS

Fifty-one thousand two hundred and seventy-two patients were included in the study. Patients receiving 2 or more bypass grafts demonstrated more significant preoperative comorbidity and disease severity. Patients undergoing 2 and >2 grafts in addition to AVR had increased mortality as compared to patients undergoing AVR and only 1 graft [odds ratio (OR) 1.17, 95% confidence interval (CI) [1.05–1.30], P = 0.005 and OR 1.15, 95% CI [1.02–1.30], P = 0.024 respectively]. A single arterial conduit was associated with a reduction in mortality (OR 0.75, 95% CI [0.68–0.82], P < 0.001) and postoperative dialysis (OR 0.87, 95% CI [0.78–0.96], P = 0.006), but this association was lost with >1 arterial conduit. One hundred and three surgeons responded to our survey, with only a small majority believing that the number of bypass grafts can influence short- or long-term postoperative outcomes in these patients, and an almost equal split in responders supporting the use of staged or hybrid interventions for patients with concomitant pathology.

CONCLUSIONS

The number of grafts performed during combined AVR and coronary artery bypass grafting is associated with increased morbidity and mortality. The use of an arterial graft was also associated with reduced mortality. Future studies are needed to assess the effect of incomplete revascularization and measure long-term outcomes. Based on our data, current published evidence, and the collective expert opinion we gathered, we endorse future work to investigate the short and long-term efficacy and safety of hybrid intervention for patients with concomitant advanced coronary and aortic valve disease.