bluuebunny/crossref_metadata_2025_split huggingface dataset:
Problematic Social Network Use: Structure and Assessment
Authors: González-Nuevo Covadonga , Cuesta Marcelino , Postigo Álvaro , Menéndez-Aller Álvaro , Muñiz José 
Published: December 2021

AbstractUsing social networks (SNs) inappropriately can lead to psychological problems. The objective of this study was to develop a new measuring instrument of problematic use of SNs. The sample comprised 1003 participants over 18 years old (M = 42.33; SD = 14.32). Exploratory factor analysis was performed with a randomly selected 30% of the sample, and confirmatory factor analysis with the remaining 70%. The reliability of the instrument was estimated, and evidence of validity in relation to the variables—anxiety, depression and satisfaction with life—was obtained. The new scale demonstrated a two-dimensional structure (GFI =0.99; RMSEA= 0.06), with one factor of negative social comparison (α = 0.94) and another of addictive consequences (α = 0.91). Clear evidence of validity related to other variables was found. The new scale demonstrated good psychometric properties. The advantage of this questionnaire is that it assesses not only excessive use but also social comparison through SNs.
The Potential of Al2O3–ZrO2-Based Composites, Formed via CSC Method, in Linear Infrastructure Applications Based on Their Mechanical, Thermal and Environmental performance
Authors: Zygmuntowicz Justyna , Piotrkiewicz Paulina , Gizowska Magda , Tomaszewska Justyna , Suchecki Przemysław , Wachowski Marcin , Torzewski Janusz , Żurowski Radosław 
Published: December 2021

Abstract
Ceramic-ceramic composites have been prepared using the centrifugal slip casting method (CSC). The method has so far been mainly utilized in making ceramic-metal composites. Al2O3–ZrO2 composites have been obtained with different shares of ZrO2, i.e., 15, 50 and 75 vol pct, respectively. Prior to sintering the composite samples, the rheological properties of the casting slips were investigated and thermogravimetric tests were performed. Upon sintering, all three series of the ceramic composites showed a density close to 100 pct and no microcracks or delamination. Phase, microstructural and mechanical investigations were carried out to determine what effect the share of ceramics has on the composites produced. An increase in the share of ZrO2 in the Al2O3–ZrO2 composite leads to a reduction in the growth of Al2O3 grains and a decrease in the average hardness. Cross-sectional hardness testing of the composites showed no evident gradient in any of the samples. Life cycle analysis (LCA) results indicate that the further optimization of the composite formation process, including up-scaling, allows to obtain Al2O3–ZrO2-based pipes possessing more favorable environmental characteristics compared with materials conventionally used for linear infrastructure, which is important in light of the global transformation toward sustainable construction and the circular economy.

Graphical abstract
Response—Corruption, Trust, and Professional Regulation
Authors: Montgomery Kathleen 
Published: December 2021

AbstractIn their 2018 article in the Cambridge Quarterly of Healthcare Ethics, Little, Lipworth, and Kerridge unpack the concept of corruption and clarify the mechanisms that foster corruption and allow it to persist, noting that organizations are “corruptogenic.” To address the “so-what” question, I draw on research about trust and trustworthiness, emphasizing that a person’s well-being and sense of security require trust to be present at both the individual and organizational levels—which is not possible in an environment where corruption and misconduct prevail. I highlight similarities in Little et al.’s framing of corruption to the persistent problem of scientific misconduct in research and publishing. I acknowledge the challenges in stemming corruption in science and medicine and conclude with a discussion about the need to reinvigorate a web of stakeholders to actively engage in professional regulation.
The relationship of blood CDC42 level with Th1 cells, Th17 cells, inflammation markers, disease risk/activity, and treatment efficacy of rheumatoid arthritis
Authors: Li Yongji , Yang Wendi , Wang Feng 
Published: December 2021

Abstract
Background
Cell division control protein 42 (CDC42) is reported to be involved in multiple inflammation processes by regulating T cell differentiation, maintaining immune cell homeostasis, and altering their function, while no relevant studies explored its clinical role in patients with rheumatoid arthritis (RA). Therefore, this study aimed to explore the correlation of CDC42 with Th1 and Th17 cells and its association with disease risk, activity, and treatment outcomes of RA.

Methods
After the enrollment of 95 active RA patients and 50 healthy subjects (HC), their CDC42, Th1 cells, and Th17 cells were assayed by RT-qPCR and flow cytometry, accordingly. For RA patients only, CDC42 was also detected at W6, and W12 after treatment. The treatment response and remission status were evaluated at W12.

Results
Compared to HC, CDC42 was reduced (P < 0.001), while Th1 cells (P = 0.021) and Th17 cells (P < 0.001) were increased in RA patients. Besides, CDC42 was negatively correlated with Th17 cells (P < 0.001), erythrocyte sedimentation rate (ESR) (P = 0.012), C-reactive protein (P = 0.002), and disease activity score in 28 joints (DAS28) (P = 0.007), but did not relate to Th1 cells or other disease features (all P > 0.05) in RA patients. Furthermore, CDC42 was elevated during treatment in RA patients (P < 0.001). Moreover, CDC42 increment at W12 correlated with treatment response (P = 0.004). Besides, CDC42 elevation at W0 (P = 0.038), W6 (P = 0.001), and W12 (P < 0.001) also linked with treatment remission.

Conclusion
CDC42 has the potential to serve as a biomarker to monitor disease activity and treatment efficacy in patients with RA.
Institutional change of compensation policy and its impact on CEO turnover and firm performance
Authors: Yin Chenli , Li Dan , Salmador Maria Paz 
Published: December 2021

AbstractThe existing corporate governance literature has mostly focused on micro-level studies of executive compensation, with limited attention paid to influential macro-level factors such as institutions and institutional changes and their impacts on corporate governance and performance. The implementation of the new compensation policy that restricts CEO compensation ceiling in state-owned firms in China offers an ideal context for us to study how institutional changes and firms’ adoption of these changes can influence CEO turnover and firm performance. Our empirical analyses reveal that the positive impact of new compensation policy adoption on CEO turnover is stronger for CEOs with originally higher compensation. The impact of new compensation policy adoption on firm performance, however, is negative, and the negative impact is contingent upon a firm’s market share and tech intensity. Our research contributes to the literature on corporate governance by theorizing and empirically demonstrating the critical role that institutions play in corporate governance.
Mindful schools: Neuropsychological performance after the implementation of a mindfulness-based structured program in the school setting
Authors: Folch Annabel , Gasol Laia , Heredia Luis , Vicens Paloma , Torrente Margarita 
Published: December 2021

AbstractMindfulness has attracted considerable attention in educational settings as it can have positive effects on children. However, the role of mindfulness practice in schools has yet to be understood. The aim of the present study is to assess the impact of mindfulness on neuropsychological performance and psychological well-being of primary school children. It also aims to explore the teacher’s mindfulness training effect on the intervention. The present study recruited 100 children (64% girls and 36% boys) aged 9–11 from a primary school in Tarragona (Spain). The research was conducted between 2016–2018 with three experimental groups: a mindfulness intervention group with a trained mindfulness teacher, a mindfulness intervention group with a non-trained mindfulness teacher, and a control group. All groups were evaluated before and after a 13-weeks intervention, consisting of 5–10 min mindfulness daily sessions before class. After the intervention, the two groups of children receiving mindfulness sessions performed better than controls in several neuropsychological tasks involving executive functions, such as short-term and working memory, learning, mental flexibility, visuospatial abilities and processing speed. No significant differences were found in the assessment of daily stress or emotional and behavioural problems. The findings of the present study can contribute to a better understanding of the role of mindfulness practice in primary children regarding neuropsychological performance, highlighting the importance of the teacher’s mindfulness training in the teaching/learning process.
Global validation of the Coronavirus Anxiety Scale (CAS)
Authors: Lieven Theo 
Published: December 2021

AbstractThe five-item Coronavirus Anxiety Scale (CAS) was found to be a useful and valid mental health screener. Participants in the respective surveys were mostly from single countries such as the US, Turkey, Mexico, or Brazil. However, a cross-cultural re-examination is lacking. This study fills this gap. In several multigroup confirmatory factor analyses with 25 countries from five continents as groups, sex and age as groups, and different stages of concern with COVID-19 infection, CAS was found to be invariant across all groups; this indicates that CAS is appropriate for meaningfully comparing the results across different groups. On a global basis, Coronavirus anxiety did not differ between female and male participants. Regarding age, however, younger individuals suffered more from anxiety of the pandemic. Individualistic cultures and those with low power distance such as in the Western hemisphere had higher COVID-19 anxiety. CAS values were also higher for those individuals who had been infected by COVID-19, those whose relatives had been infected, and those who experienced COVID-19-related death in the family. Overall, CAS is a parsimonious, valid, and reliable mental health screener on a global basis.
A Comparative Time-Diary Analysis of UK and US Children’s Screen Time and Device Use
Authors: Mullan Killian , Hofferth Sandra L. 
Published: December 2021

AbstractThis paper presents the results of a comparative analysis of the time school-age children 8-17 years in the UK and the US spent using devices such as smartphones and tablets, and their time in screen-based activities such as watching TV and playing videogames in 2014-15. The paper draws on innovative instruments measuring children’s time using technology and engaging with screens in these two countries. We find that in both, children’s time using devices overlaps with time in screen-based activities, non-screen leisure, and non-leisure activities. Children in the UK spend more time using devices than children in the US, but family size and the availability of an internet connection at home largely explain major cross-national differences. Children in the US spend less time using computers than children in the UK, and, on non-school days, more time watching TV and playing videogames. These differences remain significant after controlling for a range of child, parent and family-level characteristics. Divergent cross-national patterns for children’s time using relatively new devices and their time in more established screen-based activities are linked to differences in family composition and to differential access.
The Challenges of Sump Syndrome: a Case Report and Literature Review
Authors: Alnouri Hamed H. , Alyatama Khalifa 
Published: December 2021

AbstractSump syndrome is a rare complication of a side to side choledochoduodenostomy (CDD). After the introduction of endoscopic retrograde cholangiopancreatography (ERCP) in 1968 Kozarek (Gastroenterol Hepatol (N Y) 13(10):620-622, 2017), choledochoduodenostomy and its complications are seldom seen. The diagnosis of sump syndrome is further befogged by the lack of characteristic clinical or laboratory findings, the inability of the patient to provide medical records of their CDD, and the fact that sump syndrome only presents decades after a CDD. In this article, we will present a case of a 39-year-old female patient who presented as a case of ascending cholangitis with an initially unknown past surgical history. A detailed medical history was thoroughly taken, and her previous medical reports were presented after which an ERCP was done with extraction of debris was preformed. In a time where choledochoduodenostomy is rarely being chosen as a choice of treatment and its complications are infrequently encountered, this case serves as a reminder that even in the ERCP era, complications of choledochoduodenostomy should still be well understood.
Relapse of tagraxofusp treated blastic plasmacytoid dendritic cell neoplasm with loss of CD123 expression
Authors: Gulati Rohit , Abu-Salah Asma , Salous Tareq , Nassiri Mehdi 
Published: December 2021

AbstractTagraxofusp, a CD123-based-targeted immunotherapy, was recently approved to treat blastic plasmacytoid dendritic cell neoplasm (BPDCN) with excellent response. Also, a subset of BPDCN shows resistance to tagraxofusp. These resistant cases continue to express CD123, which forms the basis of the continued utility of tagraxofusp in newer combination chemotherapies to overcome resistance in BPDCN. Herein, we report a case of an elderly male with BPDCN that achieved complete remission on initial primary treatment with tagraxofusp. However, BPDCN relapsed after 1.5 years while on treatment, with loss of CD123 expression. At relapse, the neoplasm was comprehensively immunophenotyped by flow cytometry (performed on both peripheral blood and bone marrow specimen) and by immunohistochemical evaluation of the bone marrow clot section. The neoplasm at relapse was diagnostic of BPDCN with a lack of CD123 expression. This case highlights a potential limitation of current and upcoming tagraxofusp-based multidrug therapies, at least in a subset of refractory BPDCN. We believe our report will serve as a sentinel to incite future investigations involving alternate resistance mechanisms in BDPCN.
Iterative uncertainty reduction in multi-actor smart service innovation
Authors: Poeppelbuss Jens , Ebel Martin , Anke Jürgen 
Published: December 2021

AbstractSmart service innovation is the process of reconfiguring resources, structures, and value co-creation processes in service systems that result in novel data-driven service offerings. The nature of such offerings requires the involvement of multiple actors, which has been investigated by a few studies only. In particular, little is known about the multiple actors’ efforts to manage uncertainty in the process of establishing smart service systems. Empirically grounded in data from 25 interviews with industry experts, we explore how organizations act and interact in smart service innovation processes. For our data analysis, we adopt a microfoundational view to derive a theoretical model that conceptualizes actor engagement as a microfoundation for iterative uncertainty reduction in the actor-to-actor network of the smart service system. Our study contributes to information systems research on service systems engineering and digital transformation by explaining smart service innovation from both a multi-actor and a multi-level perspective, drawing on service-dominant (S-D) logic and microfoundations as well-established theoretical lenses.
Increased prevalence of eating disorders in Japan since the start of the COVID-19 pandemic
Authors: Kurisu Ken , Matsuoka Mikiko , Sato Kaoruko , Hattori Asako , Yamanaka Yukari , Nohara Nobuhiro , Otani Makoto , Yoshiuchi Kazuhiro 
Published: December 2021

Abstract
Purpose
The study aimed to investigate the effect of the COVID-19 pandemic on the prevalence of eating disorders in Japan.

Methods
We retrospectively reviewed the medical records of new patients with eating disorders who visited an outpatient eating disorders clinic of a single university hospital in Tokyo, Japan, from April 2020 to March 2021 (FY2020) and April 2019 to March 2020 (FY2019). We determined whether the onset or course in each patient in FY2020 was associated with the COVID-19 pandemic and classified COVID-19-associated medical histories into the following categories: (1) fatness phobia, (2) acceleration of dieting, (3) family relationships, (4) social factors, and (5) mood change. We performed the Kolmogorov–Smirnov test to compare the cumulative distribution of disease onset by month in FY2020 and FY2019.

Results
We reviewed the records of 112 and 77 patients with eating disorders in FY2020 and FY2019, respectively. The onset or course of 35 patients (31.3%) in FY2020 was associated with the COVID-19 pandemic. We classified 14 patients to fatness phobia category, 11 to acceleration of dieting, 4 to family relationships, 2 to social factors, and 4 to mood change. No COVID-19-associated cases were associated with fear of contracting the disease. The cumulative distribution of disease onset differed significantly in FY2020 and FY2019 (D = 0.248; P = 0.007).

Conclusion
This chart review suggests that the COVID-19 pandemic may increase the prevalence of eating disorders.

Level of evidence
III, cohort study.
Universality of Riemann solutions in porous media
Authors: Castañeda Pablo , Marchesin Dan , Furtado Frederico 
Published: December 2021

AbstractUniversality, a desirable feature in any system. For decades, elusive measurements of three-phase flows have yielded countless permeability models that describe them. However, the equations governing the solution of water and gas co-injection has a robust structure. This universal structure stands for Riemann problems in green oil reservoirs. In the past we established a large class of three phase flow models including convex Corey permeability, Stone I and Brooks–Corey models. These models share the property that characteristic speeds become equal at a state somewhere in the interior of the saturation triangle. Here we construct a three-phase flow model with unequal characteristic speeds in the interior of the saturation triangle, equality occurring only at a point of the boundary of the saturation triangle. Yet the solution for this model still displays the same universal structure, which favors the two possible embedded two-phase flows of water-oil or gas-oil. We focus on showing this structure under the minimum conditions that a permeability model must meet. This finding is a guide to seeking a purely three-phase flow solution maximizing oil recovery.
Hydroformylation
Authors: Zhang Baoxin , Peña Fuentes Dilver , Börner Armin 
Published: December 2021

AbstractHydroformylation is one of the most important homogeneously catalyzed reactions on an industrial scale. The manufacture of bulk chemicals clearly dominates. Large cobalt- and rhodium-based processes are mature technologies that have been developed over the past 80 years. Meanwhile, the potential of hydroformylation for the production of fine chemicals (perfumes, pharmaceuticals) has also been recognized. This review gives insight into the state-of-the-art of the reaction and its development. It commences with some remarks on the accidental discovery by the German chemist Otto Roelen within the historical and personal framework of the Fischer–Tropsch process, followed by the mechanistic basics of the catalytic cycle, metals used for the catalyst as well as their organic ligands. In addition, the stability of ligands and catalysts is addressed. The huge potential of this transformation is demonstrated using a variety of substrates. Finally, the use of some surrogates for syngas is discussed.
Distributed multi-robot sweep coverage for a region with unknown workload distribution
Authors: Cao Muqing , Cao Kun , Li Xiuxian , Yuan Shenghai , Lyu Yang , Nguyen Thien-Minh , Xie Lihua 
Published: December 2021

AbstractThis paper considers the scenario where multiple robots collaboratively cover a region in which the exact distribution of workload is unknown prior to the operation. The workload distribution is not uniform in the region, meaning that the time required to cover a unit area varies at different locations of the region. In our approach, we divide the target region into multiple horizontal stripes, and the robots sweep the current stripe while partitioning the next stripe concurrently. We propose a distributed workload partition algorithm and prove that the operation time on each stripe converges to the minimum under the discrete-time update law. We conduct comprehensive simulation studies and compare our method with the existing methods to verify the theoretical results and the advantage of the proposed method. Flight experiments on mini drones are also conducted to demonstrate the practicality of the proposed algorithm.
Non-differentiable irrational curves for twist map
Authors: AVILA ARTUR , FAYAD BASSAM 
Published: December 2021

AbstractWe construct a
$C^1$
symplectic twist map g of the annulus that has an essential invariant curve
$\Gamma $
such that
$\Gamma $
is not differentiable and g restricted to
$\Gamma $
is minimal.
Computational and experimental study of an oil jet in crossflow: coupling population balance model with multifluid large eddy simulation
Authors: Daskiran Cosan , Cui Fangda , Boufadel Michel C. , Liu Ruixue , Zhao Lin , Özgökmen Tamay , Socolofsky Scott , Lee Kenneth 
Published: December 2021

Understanding the size of oil droplets released from a jet in crossflow is crucial for estimating the trajectory of hydrocarbons and the rates of oil biodegradation/dissolution in the water column. We present experimental results of an oil jet with a jet-to-crossflow velocity ratio of 9.3. The oil was released from a vertical pipe 25 mm in diameter with a Reynolds number of 25 000. We measured the size of oil droplets near the top and bottom boundaries of the plume using shadowgraph cameras and we also filmed the whole plume. In parallel, we developed a multifluid large eddy simulation model to simulate the plume and coupled it with our VDROP population balance model to compute the local droplet size. We accounted for the slip velocity of oil droplets in the momentum equation and in the volume fraction equation of oil through the local, mass-weighted average droplet rise velocity. The top and bottom boundaries of the plume were captured well in the simulation. Larger droplets shaped the upper boundary of the plume, and the mean droplet size increased with elevation across the plume, most likely due to the individual rise velocity of droplets. At the same elevation across the plume, the droplet size was smaller at the centre axis as compared with the side boundaries of the plume due to the formation of the counter-rotating vortex pair, which induced upward velocity at the centre axis and downward velocity near the sides of the plume.
NON-CLASSICAL FOUNDATIONS OF SET THEORY
Authors: TARAFDER SOURAV 
Published: December 2021

AbstractIn this paper, we use algebra-valued models to study cardinal numbers in a class of non-classical set theories. The algebra-valued models of these non-classical set theories validate the Axiom of Choice, if the ground model validates it. Though the models are non-classical, the foundations of cardinal numbers in these models are similar to those in classical set theory. For example, we show that mathematical induction, Cantor’s theorem, and the Schröder–Bernstein theorem hold in these models. We also study a few basic properties of cardinal arithmetic. In addition, the generalized continuum hypothesis is proved to be independent of these non-classical set theories.