bluuebunny/crossref_metadata_2025_split huggingface dataset:
The effects of central cross-section diameter of the rollers on the doubly-curved surface rolling
Authors: Chang Xiang , Fu Wenzhi , Li Mingzhe , Wang Xintong , Yang Weifeng , Deng Yushan 
Published: March 2022

Abstract
During the rolling of doubly-curved sheet metal surfaces, the flow of metal is very complicated and will affect by the dimension of rolling deformation zone. The dimension of rolling deformation zone is mainly affected by the rolling reduction and the central cross-section diameter of the rollers. In this paper, the influence of central cross-section diameter of the rollers on the longitudinal bending deformation of formed spherical surfaces and the stability of the rolling process is studied combined with the rolling reduction. The current research results show that the larger the central cross-section diameter of the rollers, the more stable the rolling process, and the better the shape accuracy of the formed spherical surface. When the central cross-section diameter of the rollers is relatively small, the longitudinal bending deformation of the formed spherical surface increases with the increase of the central cross-section diameter of the rollers. However, an excessively large roller diameter will restrain the longitudinal bending deformation of the sheet. When the central cross-section diameter of the rollers is relatively large, the longitudinal bending deformation of the formed spherical surface will decrease with the increase of the central cross-section diameter of the rollers. The results in this study can be used as a reference for the design of roller to ensure that the formed doubly-curved surface can obtain greater longitudinal bending deformation and better shape accuracy under the same rolling reduction.
Intestinal Microbiota Composition of Children with Infection with Severe Acute Respiratory Syndrome Coronavirus 2 (SARS-COV-2) and Multisystem Inflammatory Syndrome (MIS-C)
Authors: SUSKUN Cansu , KILIC Omer , CIFTDOGAN Dilek YILMAZ , GUVEN Sirin , KARBUZ Adem , PARLAKAY Aslinur OZKAYA , KARA Yalcın , KACMAZ Ebru , SAHIN Aslihan , BOGA Aysun , ISANCLI Didem KIZMAZ , GULHAN Belgin , YUKSEK Saliha KANIK , KIRAL Eylem , BOZAN Gurkan , ARSLANOGLU Mehmet Ozgür , KIZIL Mahmut Can , DINLEYICI Meltem , US Tercan , VARIS Ahmet , KAYA Mucahit , VANDENPLAS Yvan , DINLEYICI Ener Cagri 
Published: March 2022

Abstract
Background: Microbiota composition may play a role in the development, prognosis, or post-infection of COVID-19. There are studies evaluating the microbiota composition at the time of diagnosis and during the course of COVID-19, especially in adults, while studies in children are limited and no study available in children with multisystem inflammatory syndrome in children (MIS-C). This study was planned to evaluate the changes in intestinal microbiota composition in children diagnosed with MIS-C and acute COVID-19 infection and to compare them with healthy children.Methods: In this prospective multicenter study, 25 children diagnosed with MIS-C, 20 with COVID-19 infection, and age and sex matched 19 healthy children were included. Intestinal microbiota composition was evaluated by detailed metagenomic analyses.Results: We observed changes of diversity, richness, and composition of intestinal microbiota in MIS-C cases than in COVID-19 cases and in the healthy controls. The Shannon Index was higher in the MIS-C and COVID-19 groups than the healthy controls (p<0.01). At phylum level, Bacteroidetes abundance have been observed in MIS-C group, while Firmicutes in healthy children. Intestinal microbiota composition changed in MIS-C cases compared to COVID-19 and healthy controls, and Faecalibacterium prausnitzii decreased, Bacteroides uniformis, Bacteroides plebeius, Clostridium ramosum, Eubacterium dolichum, Eggerthella lenta, Bacillus thermoamylovorans, Prevotella tannerae and Bacteroides coprophilus were dominant in children with MIS-C. At species level, we observed decreased Faecalibacterium prausnitzii, and increased Eubacterium dolichum, Eggerthella lenta, Bacillus thermoamylovorans in children with MIS-C and increased Bifidobacterium adolescentis, Dorea formicigenerasus in COVID-19 group. Discussion: Our study is the first to evaluate the microbiota composition in MIS-C cases. There is a substantial change in the composition of the gut microbiota: (1) reduction of F. prausnitzii in children with MIS-C and COVID-19, (2) an increase of Eggerthella lenta which is related with autoimmunity; (3) the predominance of E. dolichum is associated with metabolic dysfunctions and obesity in children with MIS-C. Alterations of the intestinal microbiota might be part of pathogenesis of predisposing factor for MIS-C. It would be beneficial to conduct more extensive studies on the cause-effect relationship of these changes in microbiota composition and their effects on long-term prognosis.
Function of Shirasu-based materials for acid-promoted hydrolysis of ammonia borane
Authors: Umegaki Tetsuo , Noguchi Daisuke , Fukumoto Tsubasa 
Published: March 2022

Abstract
The present study investigated influence of various treatment on activity of Shirasu-based materials for hydrogen evolution from aqueous ammonia borane solution. Various solution treatments and calcination treatment significantly affected on the morphology, compositions, and activity. The sample with high surface aluminum ratio and low silicon oxide crystalline impurity showed high activity for the hydrogen evolution. The sample treated with treated with ammonia following calcination at 723 K included the highest surface aluminum ratio and the lowest silicon oxide crystals impurity and exhibited the highest activity for the hydrogen evolution.
The Relationship between Marital Satisfaction and Psychological Flexibility in Parenting among Mothers of Chinese Preschool Children: The Mediating Role of Experiential Avoidance
Authors: zhang bingkun 
Published: March 2022

Abstract
Lower maternal marital satisfaction in families with preschool children in China puts mothers at risk of having lower parenting psychological flexibility. Improving mothers' marital satisfaction may be effective in enhancing their psychological flexibility in parenting and thus raising physically and mentally healthier preschool children. The purpose of this study is to investigate the association between maternal marital satisfaction and psychological flexibility in parenting and the mechanism of maternal experiential avoidance. 365 mothers of Chinese preschool children in 3 kindergartens have participated in this study and completed the Chinese version of the Olson Marital Satisfaction Questionnaire, the Chinese version of the Acceptance and Action Questionnaire (Version II), and the Chinese version of the Psychological Flexibility in Parenting Questionnaire. The total number of valid questionnaires is 335. Whether mothers live alone with her husbands or live with at least one elderly parent most of the time, or whether it is the first marriage of mothers or the second marriage, the results have showed that there are no significant differences in mothers' scores for marital satisfaction, experiential avoidance, parenting psychological flexibility and cognitive dissociation, commitment to action, and acceptance on either type of family residence structure and family structure characteristics. In addition, higher maternal marital satisfaction is associated with higher psychological flexibility in parenting, and maternal marital satisfaction also influences psychological flexibility in parenting through maternal experiential avoidance. In traditional Chinese practices, the idea that men manage external affairs while women take care of families influences family relationships, especially during the preschool years when mothers, as the primary caregivers of children, devote much of their time and energy to raising children and caring for their families, while their own needs are compressed and confined without limits. Moreover, mothers in modern society expect to advance in their careers at the same time, so they are often in a situation where family and themselves are out of balance. Therefore, fathers should spend as much time as possible with their children and wives and participate in more family activities, which will not only help their wives relieve physical and mental stress, enhance their marital satisfaction and maintain good psychological flexibility in parenting, but also enhance their happiness as fathers and promote the healthy physical and mental development of their preschool children.
Study on the Migration and Transformation of Inorganic Minerals During In-Situ Oil Shale Mining
Authors: Li Qingyu , Lu Laijun , Zhao Quansheng , Hu Shuya 
Published: March 2022

Abstract
Oil shale has become an important exploration target due to global oil shortages. The process of in-situ exploitation of oil shale requires a large amount of heat, which is bound to destroy the underground environment and make the original tight impervious layer or weak permeable layer become a loose permeable layer, thus affecting groundwater. In this paper, the release of inorganic minerals from oil shale, oil shale ash and surrounding rock to groundwater during in-situ mining has been simulated by laboratory experiments, and its mechanism has been discussed. The results showed that both ambient temperature and reaction time affected the release of anions and cations. Ca2+ is the main cation in aqueous solution at 20 ℃ and 50 ℃, and Na+ is the main cation in aqueous solution at 80 ℃ and 100 ℃. HCO3− is the main anion in the aqueous solution under different reaction conditions. Different from other ions, the content of Ca2+, Mg2+, and HCO3− decreased with increasing reaction temperature. With increasing temperature and the progress of the reaction, the water chemical types in the three aqueous solutions change. The hydrochemical type of oil shale ash-aqueous solution changes from HCO3-Na + K to SO4·HCO3-Na + K at 80 ℃ and 100 ℃. The results show that the release of inorganic minerals from oil shale to groundwater cannot be ignored due to the heat released during the in-situ exploitation of oil shale.
Study on local shear mechanism in direct shear test of rough rock joints based on DEM
Authors: Huan Jiuyang , Zhang Zhiqiang , He Mingming , Li Ning , Hu Mengdie 
Published: March 2022

Abstract
Rough joints widely exist in natural rock mass, and their shear mechanical properties control the safety and stability of rock mass. In the existing studies, the contribution of different protrusions to resisting shear stress is not mentioned. In this study, the local shear mechanism of different protrusions of rough joints in the shear process were well presented by combining quantitative and qualitative results using the discrete element method (DEM). Firstly, Barton's 10 standard roughness joint profiles were digitized. Rough joints were established using the modified smooth joint model (MSJM). The direct shear tests of joint specimens under constant normal stress were successfully conducted based on servo mode. Secondly, according to the test results, the law of shear stress was discussed. Then, the failure mode of joint specimen was discussed in detail based on the crack tracking module and force chain analysis. Next, the relationship between the number of cracks and shear stress was investigated. Finally, the variation law of average stress in different 10 segments of joints during shear was tracked based on the measuring circle function. The contribution of local joint segments in resisting shear stress is quantitatively described by 3 stress indexes.
HIV Prevalence And Associated Risk Factors Among Young Tertiary Student Men Who Have Sex With Men (MSM) In Nairobi, Kenya: A Respondent-Driven Sampling Survey
Authors: Mwaniki Samuel Waweru , Kaberia Peter Mwenda , Mugo Peter Mwangi , Palanee-Phillips Thesla 
Published: March 2022

Abstract
Background: Young men who have sex with men (MSM), are a key population at higher risk of HIV infection yet they are underrepresented in research. We conducted a bio-behavioral survey to estimate HIV prevalence and associated risk factors among tertiary student MSM (TSMSM) in Nairobi, Kenya. Methods: Between February and March 2021, 248 TSMSM aged ≥18 years who reported sex with another man in the past year participated in a respondent-driven sampling (RDS) based cross-sectional survey. Participants completed an electronically self-administered behavioral survey and provided a blood sample for HIV antibody testing, alongside urine, anorectal and oropharyngeal swabs for pooled testing of sexually transmitted infections using a multiplex nucleic acid amplification test. RDS-Analyst v.0.72 and Stata v.15 software were used for data analysis. Differences in proportions were examined using chi-square (X2) test, and unweighted multivariate logistic regression was used to assess factors associated with HIV infection. Results: HIV prevalence among study participants was 8.3%, whereas the weighted prevalence was 3.6% (95 % CI: 1.3% - 6.0%). Median ages of participants and at self-reported first anal sex with a man were 21 and 18 years, respectively. Majority (89.3%) of TSMSM owned a smart phone, 46.5% had ever used a geosocial networking app for MSM such as Grindr ® and 55.8% usually met sex partners online. Almost three-quarters (71.3%) had >1 male sex partner in the year before the survey. A third (34.3%) did not use condoms with their last sex partner, 21.2% received money from their last sex partner and 40.9% had taken alcohol/another drug during their last sexual encounter. HIV infection was associated with studying in private institutions (adjusted odds ratio/AOR=6.0; 95% CI: 1.2-30.0, p=0.027), preferring a sex partner of any age – younger, same or older (AOR=5.2; 95 CI: 1.1-25.2, p=0.041), last sex partner being >25 years (AOR=6.4; 95% CI: 1.2-34.6, p=0.030), meeting the last sex partner online (AOR=4.2; 95% CI; 1.1-17.0, p=0.043) and testing positive for Neisseria gonorrhea (AOR=7.8; 95% CI: 2.0-29.9, p=0.003).Conclusions: HIV prevalence among TSMSM in Nairobi is alarmingly high, demonstrating a need for tailored prevention and control interventions for this young key population.
Spatiotemporal mapping of malaria incidence in Sudan using routine surveillance data
Authors: Elagali Ahmed , Ahmed Ayman , Makki Nada , Ismail Hassan , Ajak Mark , Alene Kefyalew Addis , Weiss Daniel , Mohammed Abdalla Ahmed , Abubaker Elmustafa , Cameron Ewan , Gething Peter , Elagali Asmaa 
Published: March 2022

Abstract
Malaria is a serious threat to global health, with over 95% of the cases reported in 2020 by the World Health Organization in African countries, including Sudan. Sudan is a low-income country with a limited healthcare system and a substantial burden of malaria. The epidemiology of malaria in Sudan is rapidly changing due to factors including the rapidly developing resistance to drugs and insecticides among the parasites and vectors, respectively; the growing population living in humanitarian settings due to political instability; and the recent emergence of Anopheles stephensi in the country. These factors contribute to changes in the distribution of the parasites species as well as malaria vectors in Sudan, and the shifting patterns of malaria epidemiology underscore the need for investment in improved situational awareness, early preparedness, and a national prevention and control strategy that is updated, evidence based, and proactive. A key component of this strategy is accurate, high-resolution endemicity maps of species-specific malaria. Here, we present a spatiotemporal Bayesian model, developed in collaboration with the Sudanese Ministry of Health, that predicts a fine-scale (1 km × 1 km) clinical incidence and seasonality profiles for Plasmodium falciparum and Plasmodium vivax across the country. We use monthly malaria case counts for both species collected via routine surveillance between January 2017 and December 2019, as well as a suite of high-resolution environmental covariates to inform our predictions. These epidemiological maps provide a useful resource for strategic planning and cost-effective implementation of malaria interventions, thus informing policymakers in Sudan to achieve success in malaria control and elimination.
The 50 Most-Cited Publications in Research of Physical Therapy in Osteoarthritis
Authors: Lai Jieyu , Cai Zijun , Ding Yilan , Wang Weiyang , Ye Ruixi , Xiao Wenfeng , Li Yusheng , Zhang Jinglue 
Published: March 2022

Abstract
Background
This study is a bibliometric review of the literature, in order to identify and analyze the 50 most-cited publications in the field of physical therapy in osteoarthritis.
Methods
A three-step approach was applied in all databases from Web of Science in order to identify the 50 most-cited publications. Related information of the 50 most-cited studies was collected for further analysis, including title, authorship, geographic origin, journal of publication, year of publication, impact factor, and citation numbers.
Results
The 50 most-cited articles were cited from 970 to 174 times with a mean citation of 287.42 and published from 1989 to 2018 in 24 different journals. Overall, 24 countries contributed to 50 articles and the most productive country was United States with 18 articles and highest sum citations and H-index. A large part of 50 most-cited articles came from Arthritis and Rheumatism, which published 6 articles. Most of the studies focused on exercise therapy in osteoarthritis (n = 36) and randomized controlled clinical trials were reported most (n = 31). The most productive period was from 2001 to 2005. In total, 9 authors published more than two articles.
Conclusion
This bibliometric analysis is meant to provide a list of milestones in researches of physical therapy in osteoarthritis. Our study identified the most influential articles in the field of physical therapy in osteoarthritis and gave researchers an insight into the development of physical therapy in osteoarthritis.
Checkered Regression
Authors: Achab Mastane 
Published: March 2022

Abstract
This paper introduces the checkered regression model, a nonlinear generalization of logistic regression. While the decision boundary of logistic regression consists of a single hyperplane, our method is shown to tessellate the feature space by any given number of hyperplanes. In order to fit the model’s parameters to some labeled data, we describe a classic empirical risk minimization framework based on the cross entropy loss. A multiclass version of our approach is also proposed.
MTHFR 677C&gt;T (rs1801133) variant is associated with homocysteinemia but not with clinical severity in patients with peripheral arterial occlusive disease
Authors: Silvestre Guilherme da Silva , Carrara Iriana Moratto , Flauzino Tamires , Lozovoy Marcell Alysson Batisti , Cecchini Rubens , Reiche Edna Maria Vissoci , Simão Andrea Name Colado 
Published: March 2022

Abstract
Peripheral arterial occlusive disease (PAOD) is characterized by atherosclerotic lesions involving non-cardiac and non-cerebral arteries and disturbances in the axial vessels and at the microcirculatory level, which may lead to critical ischemia of lower limbs. Conflicting results have been reported about the role of the MTHFR 677 C > G (rs1801133) variant on the susceptibility to PAOD. The aim was to evaluate the association between the MTHFR 677C > T variant with susceptibility and severity of PAOD and with serum levels of homocysteine (Hcy). A case-control study enrolled 157 patients with PAOD and unrelated 113 controls from Southern Brazil. The clinical severity of the PAOD was assessed by Fontaine classification and anatomoradiological categories by Inter-Society Consensus for the Management of Peripheral Arterial Disease (TASC). The MTHFR 677C > T was genotyped using real-time polymerase chain reaction and Hcy levels were determined using chemiluminescence in microparticles assay. The PAOD patients showed higher Hcy than controls but the values did not differ according to Fontaine and TASC categories. The MTHFR 677C > T variant was not associated with PAOD, the clinical stage, and the anatomoradiological categories. However, patients carrying the TT genotype (recessive model) or CT + TT genotypes (dominant model) presented higher levels of Hcy than those carrying other genotypes. In conclusion, the T allele of MTHFR 677C > T variant was associated with hyperhomocysteinemia in PAOD patients, but not in controls. Our data suggested a possible interaction between MTHFR 677C > T variant and the presence of other genetic, epigenetic and environment factors associated with PAOD on modulation of the Hcy metabolism.
D’Arcy Wentworth Thompson And Two Dimensional Möbius Image Registration
Authors: Tufail M. Y. , Gul S. 
Published: March 2022

Abstract
The process for the alignment of two images such that their appearances resemble is called the image registration. Image registration is widely studied in several fields such as remote sensing, computer vision, morphophonemics, medical imaging, etc. The field of image registration is inspired by the pioneer work of D’Arcy Thompson. In his seminal book, On Growth and form, he presented the idea of image transformation, between species. Over the past several years his book has been used as justification for the study of diffeomorphic deformations of images of different objects, a field that is now extremely well studied, particularly for the registration of medical images. Thompson’s examples are hand-drawn, and consist of a two dimensional outline of an animal (or part of an animal) and a grid superimposed on it. The deformation to another animal form is demonstrated by the picture of the new form and what is intended to be the same grid pushed forward so that the smoothness of the deformations can be clearly seen. This smoothness is one of the essential requirement for the diffeo-morphic image registration. Thompson, in his book, mentioned isogonal transformations for his several examples. Nowadays an isogonal transformation is termed as conformal transformation. Thompson’s principal point was that the deformations between closely related species should be simple. It has been suggested that this idea of simplicity can be interpreted in modern parlance as being examples of low dimensional groups. Clearly, the infinite dimensional diffeomorphism group or the conformal group would not be simple, but the six dimensional Möbius group (a subgroup of conformal group) would be. His claims of conformally-related change between species were investigated further by Rus-sian scientist Petukhov, who used Thompson’s grid method as well as computing the cross-ratio (which is an invariant of the Möbius group, a finite-dimensional subgroup of the group of conformal diffeomorphisms) to check whether sets of points in the images could be related by a Möbius transformation. Thmpson’s examples and Petukhov’s investigation motivated us to explore Möbius group. This Möbius group is the composition of four simple transformations that are scaling, rotation, translation and inversion. In this paper we present the image registration using Möbius diffeomorphisms. We present the novel idea for the selection of initial guess that plays a key role for the optimisation. The optimisation is based on the gradient descent algorithm with and without the labelled points (landmarks). Numerical examples illustrate the ability of the method to perform Möbius registration.