bluuebunny/crossref_metadata_2025_split huggingface dataset:
Clinical status and cytokine profiles in patients with asthma or chronic obstructive pulmonary disease vaccinated against influenza
Authors: Kostinov Mikhail , Chuchalin Alexander , Chebykina Anna , Khrapunova Isabella , Cherdantsev Alexander , Solov’eva Irina , Akhmatova Nelli , Polishchuk Valentina , Kryukova Nadezhda , Kostinova Aristitsa , Vlasenko Anna , Loktionova Marina , Albahansa Yvette , Shmit’ko Anna , Shogenova Lyudmila 
Published: February 2025

Background
Influenza vaccine is a tool for preventing infection and reducing exacerbations in patients with asthma and chronic obstructive pulmonary disease (COPD). However, the associations between clinical outcomes and changes in the levels of inflammation markers have not been fully delineated. The purpose of this study was to investigate the clinical course and the changes in the levels of inflammation markers in patients with asthma or chronic obstructive pulmonary disease for one year after vaccination against influenza.

Methods
The prospective study for one year included 34 patients with asthma, 20 patients with COPD vaccinated against influenza, both groups being under a basic maintenance therapy, and 26 healthy individuals vaccinated with the trivalent polymer-subunit (adjuvanted) vaccine, containing 5 μg of influenza virus strains and 500 μg of azoximer bromide. The levels of C-reactive protein (CRP) and serum cytokines (IL-2, IL-6, IL-10, and IL-17) were measured by enzyme-linked immunosorbent assay (ELISA) at baseline and 6 and 12 months after vaccination.

Results
Over a year after vaccination against influenza, the frequency and duration of bronchopulmonary exacerbations significantly decreased both in patients with asthma and those with COPD: by 1.9–2 and 2.2–2.5 times, respectively. There was also a significant reduction in the frequency and duration of hospitalization (by 2.0–2.5 and 2.3–3 times, respectively). Other changes observed over the one-year follow-up period included a 1.6-fold reduction (р<0.01) in the need for outpatient care and a reduction in the number of courses of systemic corticosteroids (by 16.7%; р<0.05) in asthma patients; and a 3.6-fold decrease (р<0.05) in the number of courses of antibiotics in COPD patients. Twelve months after vaccination against influenza, the study participants had significantly lower IL-6 levels, and COPD patients, additionally, showed a reduction in IL-10 levels compared to baseline. Our study identified certain correlations between positive clinical outcomes of vaccination and levels of inflammation markers.

Discussion
Analysis of the immunological, clinical and functional parameters in asthma and COPD patients showed that vaccination not only reduces the risk of influenza and other respiratory infections due to activation of non-specific protection, but also improves the clinical course of asthma and COPD.
Comparison of respiratory symptoms and pulmonary functions of adult male cigarette smokers and non-smokers in Sri Lanka; A comparative analytical study
Authors: Herath Prasanna , Wimalasekera Savithri Wasundara , Amarasekara Thamara Dilhani , Fernando Manoj Sanjeewa , Turale Sue 
Published: February 2025

Background
Cigarette smoking has long been associated with decreased lung function and increased respiratory symptoms globally. While this relationship is well-established, a critical gap exists in our understanding of the specific impact of smoking intensity on individual lung volumes, particularly among the general population. Despite numerous studies conducted on this topic worldwide, there is a noticeable absence of research focusing on the Sri Lankan population, and South Asian studies in this context remain sparse. This study evaluated the prevalence of respiratory symptoms and pulmonary function changes among chronic cigarette smokers and compared them with non-smokers. Furthermore, the proposed study intends to close this gap by undertaking a systematic assessment of the influence of cigarette smoking on lung function and respiratory symptoms in the general population of Sri Lanka. Additionally, the present research represents the first-ever Lung function study conducted in Sri Lanka specifically targeting cigarette smokers.

Methods
Adult male daily smokers (n = 360) and matched non-smokers (n = 180) from the Colombo district, Sri Lanka, were chosen. Smokers were compared in age, height, and weight with a matched nonsmoking control group. An interviewer provided a questionnaire to collect data on socio-demographic information, smoking behaviors, and clinical respiratory symptoms. Lung function tests were performed with a calibrated PC-based Medikro® Pro (Finland) spirometer and forced vital capacity (FVC), forced expiratory volume in 1 s (FEV1), and FEV1/ FVC ratio, peak expiratory flow (PEF), forced expiratory flow between 25% and 75% of FVC (FEF 25–75%) were measured.

Results
Smokers had a significantly higher prevalence of respiratory symptoms and significantly lower FVC, FEV1, FEV1/ FVC, and PEF, FEF 25–75% values than non-smokers. There was a significantly negative correlation of FVC, FEV1, FEV1/ FVC, and PEF, FEF 25–75% with the duration of smoking, and the Brinkman Index. According to the Multiple regression analysis, smoking significantly contributed to deteriorated pulmonary function variables.

Conclusion
This study revealed that continuous smoking accelerates the deterioration of lung function and increases respiratory symptoms. Early strategies to reduce tobacco use are recommended.
Combination of PSInSAR and GPS for stress and strain tensor estimation in Afar
Authors: Nigussie Andnet , Eshagh Mehdi , Ashagrie Andenet 
Published: February 2025

Abstract
This article investigates the strain and stress tensors of the Afar region using the integration of global navigation satellite system (GNSS) and persistent scatterer interferometric synthetic aperture radar (PSInSAR) data. We first estimated the three-dimensional displacement field of the Afar area using combined GPS and PSInSAR data for the period 2006–2009. Secondly, the variance component estimation is applied to the heterogeneous GNSS and PSInSAR data and the displacement field is computed. Then, the behaviour of crustal movement within the study area is investigated by dividing the region into several small triangles or tetrahedrons using the Delaunay triangulation and applying the finite element method (FEM) to estimate the strain and stress tensors for each tetrahedron. The average stress tensor elements

τ

x
x

,

τ

y
y

{\tau }_{xx},\hspace{.25em}{\tau }_{yy}

, and

τ

z
z

{\tau }_{zz}

of the study area are 0.067, 0.121, and 0.126 MPa in the North, East, and Up coordinates, respectively. The result also shows that the nearby post-diking deformation has been followed by the Afar Tectono-Magmatic Event that happened in September 2005.
Risk factors and outcomes of uterine rupture before onset of labor vs. during labor: a multicenter study
Authors: Nie Qingwen , Luo Shujuan , Chen Bingjun , Wang Lu , He Fang 
Published: February 2025

Abstract

Objectives
This study aims to reveal the distinctions between uterine rupture (UR) that occurs before onset of labor and during labor.

Methods
This multicenter study was conducted across three tertiary hospitals in South China involving obstetrical UR from January 2009 to April 2022. Cases were categorized into two groups based on the timing of UR: prelabor and labor.

Results
Among the cases of UR, 42 were classified in the prelabor group, and 27 in the labor group. The prelabor group had a higher prevalence of histories of myomectomies, ectopic pregnancy surgeries, congenital uterine anomalies, and prior URs. Among these ruptures, 45.2 % were located at cesarean section (CS) scars, compared to 81.5 % of cases during labor. Ruptures before onset of labor occurred across all gestational intervals, whereas those during labor, except one, occurred after 32 weeks. The median gestational age was 33 and 39 weeks in each group. Notably, prelabor cases demonstrated longer symptom-to-delivery intervals. Placenta percreta was more common in the prelabor group (16.7 vs. 3.7 % in the labor group). Among labor-related cases, 16 of the 27 occurred during trial of labor after cesarean (TOLAC), and four were identified following vaginal birth after cesarean (VBAC).

Conclusions
URs differ by timing relative to labor. Ruptures before onset of labor more often resulted from scars other than CS and placenta percreta, occurring at earlier gestational weeks. This finding highlighted challenges in diagnosis and management. In contrast, ruptures during labor mostly occurred after 32 weeks and were strongly associated with TOLAC/VBAC.
Displaying luxury on social media: Chinese university students’ perception of identity, social status, and privilege
Authors: Skulsuthavong Merisa , Wang Ziyuan 
Published: February 2025

Abstract

Study purpose
This study draws on theories of conspicuous consumption, cultural capital, and impression management to explore how Chinese university students perceive the display of luxury goods consumption on social media as a means of communicating identity, social status, and privilege.

Design/methodology/approach
A mixed-methods approach was employed, using an online survey with open-ended questions to gather qualitative and quantitative data from 329 Chinese university students. Thematic analysis was conducted to identify critical patterns in participants’ perceptions of the display of luxury goods on social media.

Findings
The findings reveal that participants perceive the display of luxury goods on social media as a strategy for self-presentation and identity construction. This practice is influenced by cultural norms, particularly the concept of “face” (mianzi), which refers to maintaining social reputation and gaining respect within one’s community. While some participants associate luxury displays with elevated social standing and economic power, others critque them as performative acts and disconnected from authentic markers of privilege.

Social implications
The study highlights the role of social media in shaping cultural narratives of identity and privilege, particularly in collectivist societies like China. It underscores how digital platforms mediate the performance of luxury consumption, reflecting both global trends and localized cultural dynamics.

Practical implications
Marketers and social media practitioners can leverage these insights to design culturally relevant strategies that align with Chinese consumers’ motivations for luxury consumption.

Originality/value
This study contributes to the literature by integrating global theories of luxury consumption with the unique cultural constructs of Chinese society. It explains how social media shapes the intersection of identity, status, and privilege in digital spaces.
Encapsulation at Fifty Years: Results from a Survey of United States Paper Collections
Authors: Gates Glenn A. , McGuiggan Patricia Marie 
Published: February 2025

Abstract
A survey of the document preservation technique referred to as encapsulation was conducted of United States institutions with catalogued archives and paper collections. The purpose of this survey was to inform: an estimation of the proportion and type of materials and documents encapsulated, the popularity of various methods and the materials used for encapsulation creation, and the condition of encapsulation materials and encapsulants in collections. The survey responses provided the first data pertaining to the state of encapsulation approximately fifty years after encapsulation for preservation was formally developed. Survey results suggest that: encapsulation is well-established and highly valued in the toolbox of preservation strategies yielded by conservators and collection managers; that most encapsulation construction materials used during the past fifty years evidence few deterioration problems such as yellowing or embrittlement; that it is not a frequent occurrence that conservation treatments like deacidification, washing or the introduction of pollution sorbents is common; and that there is general satisfaction with encapsulation as a preservation method for weakened paper, maps and posters, whether the encapsulation is used in an archival or exhibition environment. Several text responses from survey participants expressed that future research on polymeric material stability and permeability may alleviate some concerns regarding future use of encapsulation.
Investigation on cutting of CFRP composite by nanosecond short-pulsed laser with rotary drilling method
Authors: Sheng Liyuan , Cheng Xiangyu , Jiang Shilong , Zhao Chaochao , Liu Jingdong , Jing Chenghu , Wang Jiale , Xu Liangjie , Xiao Yinan , Wang Bin , Jiao Junke 
Published: February 2025

Abstract
In the present research, the nanosecond short-pulsed laser with rotary drilling method was designed to process carbon fiber-reinforced polymer (CFRP) composite plate. The hole dimension, surface morphology, heat-affected zone (HAZ), and mechanical properties were analyzed. The results reveal that the CFRP composite plate could be rapidly drilled with highly qualified processing surface by the nanosecond short-pulsed laser with rotary drilling method. The figures such as circle, square, triangle, and regular hexagon could be processed with minimum hole diameter of 0.1 mm. The changing of laser scanning speed and laser power could result in the variation in diameter of hole entrance and exit, which fluctuates in scope of 35 μm. The calculated biggest taper angle is about 0.43°, but the smallest taper angle is about 0.12°. The laser drilling on CFPR composite decreases the tensile strength by about 9%, which should be ascribed to the damage of continuous carbon fiber, but it is still acceptable. The nanosecond short-pulsed laser with rotary drilling method generates a small HAZ on hole entrance but almost no HAZ in hole exit. The surface roughness of laser processed CFRP ranges from 2.925 to 4.226 μm. Comparatively, the laser scanning speed between 800 and 1,000 mm/s and laser power around 28 W would be the optimal choice, which could realize the best balance between surface quality and efficiency.
The Relationship Among Dietary Habit, Physical Fitness and Stress to the Obesity Condition of Indonesian National Police (Polri) Personnel
Authors: Putra Novi Setyawan , Rahayu Tandiyo , Yuwono Cahyo 
Published: February 2025

Obesity is a physical condition that is of great concern to Polri Personnel. Apart from having an excessive anthropometric impact, it can also result in less optimal physical condition performance. This research aims to find out how big is the relationship: 1) between dietary habit and the obesity condition of Polri personnel, 2) between physical fitness and the obesity condition of Polri personnel, 3) between stress and the obesity condition of Polri personnel, and, 4) among dietary habit, physical fitness, and stress on the obesity condition of Polri personnel. This research is a type of correlational research. This research was conducted with subjects totaling 584 Polri personnel. Instruments used in the research were dietary habit instrument using the Food Frequency Questionnaires for Adults, physical fitness instrument using the National Police Physical Fitness Test, and stress instrument using the Police E-Mental Application. Data analysis techniques in the research involved product moment correlation test analysis, multiple correlation with the regression line equation, prerequisite test and hypothesis test as well as univariate and bivariate analysis. This research shows that: (1) there is a relationship between dietary habit and the obesity condition of Polri personnel with a p-value of 0,631 with significance value of 0,000, (2) there is a relationship between physical fitness and the obesity condition of Polri personnel with a p-value of 0,433 with significance value of 0,000, (3) there is a relationship between stress and the obesity condition of Polri personnel with a p-value of 0,429 with significance value of 0,000, (4) there is a relationship among dietary habit, physical fitness, and stress on the obesity condition of Polri personnel by obtaining an Fcount value of 13,143 and an Ftable value of 8,532 marked by an R value of 0,537 with a significance level of 0,000. Based on the research results above, it can be concluded that there is a fairly strong relationship among dietary habit, physical fitness, and stress on the obesity condition of Polri personnel, and it can be seen that dietary habit has the most significant influence compared to physical fitness and stress. Suggestion: Polri needs to adopt programs that encourage healthy dietary habit for the personnel, It is important for the Regional Police (Polda) physical fitness bureau to implement a comprehensive and sustainable physical fitness program, and for the Polda psychology bureau to provide programs or periodic checks that can help managing and reducing stress in the workplace.
ВЕЙВЛЕТЫ ЧЕБЫШЕВА ВТОРОГО РОДА ДЛЯ РЕШЕНИЯ ДРОБНОГО УРАВНЕНИЯ ЛАНЖЕВЕНА
Authors: БАРГАМАДИ Э. , ТОРКЗАДЕ Л. , НУРИ К. 
Published: February 2025

В статье предлагается эффективный численный метод решения дробного уравнения Ланжевена, основанный на вейвлетах Чебышева второго рода. С использованием этой операторной матрицы интегрирования дробного порядка вейвлетов Чебышева второго рода исходная задача преобразуется в систему алгебраических уравнений, которая может быть решена методом Ньютона. После анализа метода оценивается граница ошибки. Кроме того, эффективность метода оценивается с помощью нескольких численных примеров.
This paper aims to provide an efficient numerical method based on the second Chebyshev wavelets for solving the fractional Langevin equation. Applying this operational matrix of fractional-order integration of second Chebyshev wavelets converts the original problem into a system of algebraic equations, which could be solved by the Newton method. After analyzing the method, the error bound is estimated. Moreover, the method's efficiency through a few numerical examples is evaluated.
МАТЕМАТИЧЕСКОЕ И ЧИСЛЕННОЕ МОДЕЛИРОВАНИЕ ГЕННОЙ СЕТИ ПОДДЕРЖАНИЯ ПЛЮРИПОТЕНТНОСТИ СТВОЛОВОЙ КЛЕТКИ
Authors: ГОЛУБЯТНИКОВ В.П. , ТАТАРИНОВА Е.А. 
Published: February 2025

Рассматриваются нелинейные динамические системы, моделирующие взаимодействие компонент генной сети, которая регулирует раннюю стадию функционального состояния эмбриональных стволовых клеток. Проведён параметрический анализ рассматриваемых динамических систем и исследованы вопросы единственности и устойчивости их стационарных точек, что позволило описать критерий существования периодических траекторий в окрестностях этих точек и локализовать положение таких осцилляций в фазовых портретах систем уравнений, моделирующих указанные процессы. Разработаны облачные ресурсы для проведения вычислительных экспериментов с такими моделями.
We consider nonlinear dynamical systems as a model of interaction of components of a gene network which regulates early stages of an embryonic stem cells state. A parametric analysis of these dynamical systems is performed in order to describe the (non)uniqueness and stability of their equilibriums. We have obtained a criterion of existence of periodic trajectories near these points and localized these oscillations on the phase portraits of dynamical systems which describe these processes. A special software for cloud numerical experiments with these systems has been elaborated.
О МАТРИЦАХ С КОКВАДРАТОМ JK(1) ⊕ JL(1)
Authors: ИКРАМОВ Х.Д. 
Published: February 2025

Рассматривается задача о рациональных способах проверки конгруэнтности комплексных матриц. При этом рациональными считаются конечные алгоритмы, использующие только арифметические операции. Важную роль в проверке конгруэнтности невырожденных матриц играют их коквадраты. Проверка осложняется, если в спектре коквадратов присутствуют унимодулярные собственные значения, и особенно, если такие собственные значения дефектны. Наиболее продвинутым результатом в этом направлении является рациональный алгоритм для матриц A и B, имеющих коквадратом прямую сумму Jm (1) ⊕ Jm (1) . В данной статье этот алгоритм переносится на случай, когда коквадрат есть прямая сумма двух жордановых клеток различных порядков. Этот перенос существенно опирается на установленные в статье дополнительные факты относительно решений матричного уравнения X - JΤm(1) XJm(1) = 0.
Rational techniques for verifying the congruence of complex matrices are discussed. An algorithm is said to be rational if it is finite and uses only arithmetical operations. An important part in verifying the congruence of nonsingular matrices play their cosquares. The verification gets complicated if there are eigenvalues of modulus 1 in the spectrum of cosquares; this is especially true if such eigenvalues are defective. In this direction, the most advanced result is the rational algorithm for matrices A and B whose cosquare is the direct sum Jm (1) ⊕ Jm (1). Here, this algorithm is extended to the case where the cosquare is the direct sum of two Jordan blocks of distinct orders. This extension is heavily dependent on additional facts concerning the solutions to the matrix equation X - JΤm(1)XJm(1) = 0. found in the present paper.
Accumulated dose stability parameters in p-type and n-type silicon diodes
Authors: Pascoalino Kelly , C. Gonçalves Josemary A. , De Camargo Fabio , Bueno Carmen C. 
Published: February 2025

This work investigates the influence of doping type on the dose responses and the accumulated dose stability of n- and p-type silicon MCz diodes. The operating principle of diode-based dosimeters relies on measuring the radiation-induced currents delivered by non-polarized diodes throughout the exposure time. An electrometer promptly reads the current signal, linearly dose rate dependent. The offline integration of the current signal provides the charge generated in the sensitive volume of the diode, expected to be proportional to the absorbed dose. The experimental approach involves analyzing the repeatability of the current signals, the dose responses of both pristine and pre-irradiated diodes, the correspondent charge sensitivities, and the sensitivity decay with increasing doses. For doses up to 175 kGy, the results reveal a linear dose response of the MCz(p) diode, characterized by a charge sensitivity of 3.1 µC/Gy. Within the same dose range, the response of the MCz(n) diode is visibly saturated and given by a fourth-order polynomial function. This saturation effect is likely linked to radiation damage effects manifesting in the current decay with increasing accumulated doses. This surmise is confirmed in this work by a less pronounced drop in sensitivity of the p-type diode than that recorded for the n-type diode when both are subjected to 175 kGy. This behavior is ascribed to the working principle of the diode in the short-circuit current mode and the differences between the diffusion lengths of minority carriers in n- and p-type silicon materials. The diodes' response stability and dose lifespan remain to be further investigated.