bluuebunny/crossref_metadata_2025_split huggingface dataset:
Strongly NIP almost real closed fields
Authors: Krapp Lothar Sebastian , Kuhlmann Salma , Lehéricy Gabriel 
Published: September 2021

AbstractThe following conjecture is due to Shelah–Hasson: Any infinite strongly NIP field is either real closed, algebraically closed, or admits a non‐trivial definable henselian valuation, in the language of rings. We specialise this conjecture to ordered fields in the language of ordered rings, which leads towards a systematic study of the class of strongly NIP almost real closed fields. As a result, we obtain a complete characterisation of this class.
A qualitative study of the factors that help the coping of infertile women
Authors: Halkola Suvi‐Tuuli , Koivula Meeri , Aho Anna Liisa 
Published: September 2021

AbstractAimThe study describes the factors that help the coping of infertile women.DesignA qualitative study.MethodsPurposive sampling was used in gathering the data from the Finnish Infertility Associations closed discussion forum on Facebook. An electronic questionnaire included structured background questions and a qualitative open‐ended question related to the factors that help coping. In total, 101 women participated voluntarily in the study. The participants had at least a 1‐year personal experience of infertility. The data was analysed using inductive content analysis.ResultsThe factors that helped the coping of infertile women were personal resources such as mental well‐being and having good abilities to deal with the issue. Also, a well‐functioning relationship and getting help contributed to coping. Coping was also positively influenced by the ability to adapt to a childless life, which included having comforting thoughts, doing things that brought relief and orientating thinking towards the future.
A fuzzy model predictive controller for stick‐slip type piezoelectric actuators
Authors: Cheng Long , Wang Ang , Qin Shijie 
Published: September 2021

AbstractIn nano/micro‐positioning applications, stick‐slip type piezoelectric actuators (SSPEAs) are usually employed for a satisfactory performance in both the movement range and the positioning accuracy. Unfortunately, the controller design of SSPEAs is a challenging task, which is seldom studied in the literature. So this article presents an idea of using the fuzzy model predictive control approach for the high‐precision positioning. First, a prototype of the stick‐slip type piezoelectric actuator is designed. Then a Takagi‐Sugeno fuzzy model is established for the entire SSPEA, whose parameters can be further adapted by the recursive estimation approach based on the online measurement. Based on this model, a predictive controller can be designed for SSPEAs. Compared to some existing studies, the proposed fuzzy model directly describes the input–output relationship of the entire SSPEA rather than modeling separately. As a result, the controller can be simplified. Finally, some experiments are conducted on the SSPEA prototype, which demonstrates a satisfactory control performance
Calculation model for uniaxial stress–strain relationship of wood plastic composites
Authors: Zhao Longlong , Xi Fei , Wang Gaoyuan 
Published: September 2021

AbstractThis paper presents an investigation on the mechanical properties of wood plastic composites under uniaxial stress. Experimental studies of test pieces with tensile and compressive load were performed. Failure modes, stress–strain relationship, and other crucial parameters were recorded and analyzed. The results indicated that brittle failure was the typical failure mode of the tensile test specimens, however, shear‐compression failure and wedge double shear failure were commonly observed for samples under compressive load. Mechanical properties of WPC are better than those of timber according to different national standards. Different analytical models were proposed for evaluating the stress–strain response of the specimens. The fitting between the experimental results and calculations was good.
Polyamide membranes enabled by covalent organic framework nanofibers for efficient reverse osmosis
Authors: Yang Guanghui , Zhang Zhe , Yin Congcong , Shi Xiansong , Wang Yong 
Published: September 2021

AbstractPolyamide reverse osmosis membranes are indispensable for the worldwide clean water supply. Incorporation of nanomaterials into polyamide separation layer provides an evident methodology to enhance the water flux. However, the desalination performance would be compromised by the inadequate compatibility between the nanomaterial and the polyamide matrix. In this work, we propose a straightforward strategy to use covalent organic frameworks (COF) nanofibers as the efficient nanofiller for the fabrication of high flux polyamide membranes. The COF nanofibers featuring crystalline structures, large surface area and well‐defined micropores are synthesized by a surfactant‐mediated solvothermal method. It is found that the COF nanofibers are able to mediate the interfacial polymerization process via the controlled release of amine molecules. This creates the reduced thickness of the polyamide separation layer. Moreover, the rigid and permanent nanopores of COF could serve as additional channels for water permeation. Benefitting from the low thickness and the additional channels, thus fabricated membranes exhibit a significantly enhanced water flux, while maintaining a slightly improved NaCl rejection. Our work is expected to provide a new insight for the design and fabrication of advanced polyamide reverse osmosis membranes.
Endobronchial mucoepidermoid carcinoma in a child with postinfectious bronchiolitis obliterans
Authors: Fonseca Sara , Silva Sónia , Magalhães Adriana , Lago Rita , Estevinho Norberto , Bom‐Sucesso Maria do , Azevedo Inês 
Published: September 2021

AbstractEndobronchial mucoepidermoid tumors are rare neoplasms. Due to nonspecific symptoms, diagnosis can be challenging, but early diagnosis and treatment are crucial for prognosis. We present the case of a boy, with chronic respiratory insufficiency due to bronchiolitis obliterans, that presented worsening exertional dyspnea at 12 years. Spirometry showed unexpected deterioration of respiratory function and a computed tomography scan revealed an obstructive polypoid mass in the intermediate bronchus. Given the severe basal ventilatory compromise and risk associated with surgical treatment, rigid bronchoscopy, and laser photocoagulation were performed, with clinical and functional improvement. The histological examination revealed a low‐grade mucoepidermoid carcinoma. The option for a minimally invasive procedure requires careful follow‐up due to the risk of tumor recurrence.
Laboratory parameters between multisystem inflammatory syndrome in children and Kawasaki disease
Authors: Zhou Chunling , Zhao Yan , Wang Xia , Huang Ying , Tang Xuewen , Tang Lei 
Published: September 2021

AbstractMultisystem inflammatory syndrome in children (MIS‐C) associated with coronavirus disease 2019 (COVID‐19) has been described to partially overlap with Kawasaki disease (KD) with regard to clinical symptoms, but they are unlikely to share the same disease entity. We conducted a systematic review and meta‐analysis to characterize the laboratory parameters of MIS‐C compared with those of KD and Kawasaki disease shock syndrome (KDSS). Databases were searched for studies on laboratory parameters of MIS‐C (hematology, inflammatory markers, cardiac markers, and biochemistry) through May 31, 2021. Twelve studies with 3073 participants yielded 969 MIS‐C patients. In terms of hematology, MIS‐C patients had lower levels of leukocytes, absolute lymphocyte count and platelet count (PLT) than KD patients and had similar absolute neutrophil count (ANC) and hemoglobin (Hb) levels. In terms of inflammatory markers, MIS‐C patients had higher levels of C‐reactive protein, D‐dimer and ferritin than KD patients and had similar levels of procalcitonin and erythrocyte sedimentation rate (ESR). In terms of cardiac markers, MIS‐C patients had higher CPK levels than KD patients. The levels of N‐terminal pro‐brain natriuretic peptide, troponin and aspartate aminotransferase were not significantly different between MIS‐C and KD patients. In terms of biochemistry, MIS‐C patients had lower levels of albumin, sodium and alanine aminotransferase and higher levels of creatinine than KD patients. In addition, MIS‐C patients had lower levels of PLT, Hb and ESR and higher levels of ANC than KDSS patients. Measurement of laboratory parameters might assist clinicians with accurate evaluation of MIS‐C and further mechanistic research.
“You're on mute!” Does pediatric CF home spirometry require physiologist supervision?
Authors: Fettes Emma , Riley Mollie , Brotherston Stephanie , Doughty Claire , Griffiths Benjamin , Laverty Aidan , Aurora Paul 
Published: September 2021

AbstractIntroductionThe coronavirus disease 2019 (COVID‐19) pandemic has accelerated the move towards home spirometry monitoring, including in children. The aim of this study is to determine whether the remote supervision of spirometry by a physiologist improves the technical quality and failure rate of the maneuvers.MethodChildren with cystic fibrosis who had been provided with NuvoAir home spirometers were randomly allocated to either supervised or unsupervised home spirometry following a detailed training session. Home spirometry was performed every 2 weeks for 12 weeks. Tests were assigned a quality factor (QF) using our laboratory grading system as per American Thoracic Society/European Respiratory Society standards, with tests marked from A to D, or Fail. In our laboratory, we aim for QF A in all spirometry tests, but report results of QF B or C with a cautionary note. QF A was, therefore, the primary outcome, and QF A–C, the secondary outcome.ResultsSixty‐one patients were enrolled; 166 measurements were obtained in the supervised group, and 153 in the unsupervised group. Significantly more measurements achieved QF A in the supervised compared to unsupervised group (89% vs. 74%; p = <0.001), while proportions reaching Grade A–C were similar (99% vs. 95%; p = 0.1). All significant declines in spirometry results had a clinical rather than technical reason. Family/patient feedback for both arms was very positive.ConclusionThese results suggest that home spirometry in children should ideally be remotely supervised by a physiologist, but acceptable results can be obtained if resources do not allow this, provided that training is delivered and results monitored according to our protocol.
It was a dark and stormy night—Investigation of acrylate storage tank explosions
Authors: Kas Kathleen , Morrison Delmar “Trey” 
Published: September 2021

AbstractIn the early morning hours of May 16, 2012, a thunderstorm rolled into the Bristol, PA, plant that produced acrylic polymers. Lightning struck in the tank farm area. Within seconds, an ethyl acrylate tank exploded and was followed a few minutes later by a butyl acrylate tank explosion. The explosions and ensuing fire led to a lengthy shutdown; fortunately, there were no injuries. This article details the investigation into the complex sequence of events that led to the two explosions. The tank installations complied with the industry lightning standards, but if the tanks met industry standards, why did the explosion happen? While the exact mechanism could not be determined with certainty, the ignition of the atmosphere in the ethyl acrylate tank most likely occurred from a spark discharge inside the tank's headspace, likely between internal components at different electrical voltage potentials. This type of mechanism could invalidate the Faraday Cage assumption inherent in current industry guidance and may represent a hazard that is not currently well‐recognized. It should also be noted that, while lightning cannot be prevented, the outcome of a lightning strike can be mitigated by the use of safeguards such as inertion, flame arresters, diking, and foam systems.
Deviation probabilities for arithmetic progressions and other regular discrete structures
Authors: Fiz Pontiveros Gonzalo , Griffiths Simon , Secco Matheus , Serra Oriol 
Published: September 2021

AbstractLet the random variable count the number of edges of a hypergraph induced by a random m element subset B of its vertex set. Focussing on the case that satisfies some regularity condition we prove bounds on the probability that X is far from its mean. It is possible to apply these results to discrete structures such as the set of k‐term arithmetic progressions in the cyclic group . Furthermore, we show that our main theorem is essentially best possible and we deduce results for the case is generated by including each vertex independently with probability p.
Improved fire severity mapping in the North American boreal forest using a hybrid composite method
Authors: Holsinger Lisa M. , Parks Sean A. , Saperstein Lisa B. , Loehman Rachel A. , Whitman Ellen , Barnes Jennifer , Parisien Marc‐André 
Published: September 2021

AbstractFire severity is a key driver shaping the ecological structure and function of North American boreal ecosystems, a biome dominated by large, high‐intensity wildfires. Satellite‐derived burn severity maps have been an important tool in these remote landscapes for both fire and resource management. The conventional methodology to produce satellite‐inferred fire severity maps generally involves comparing imagery from 1 year before and 1 year after a fire, yet environmental conditions unique to the boreal have limited the accuracy of resulting products. We introduce an alternative method – the ‘hybrid composite’ – based on deriving mean severity over time on a per‐pixel basis within the cloud‐computing environment of Google Earth Engine. It constructs the post‐fire image from satellite data composited from all valid images (i.e., clear‐sky and snow‐free) acquired in the time period immediately after fire through the early growing season of the following year. We compare this approach to paired‐scene and composite approaches where the post‐fire time period is from the growing season 1 year after fire. Validation statistics based on field‐derived data for 52 fires across Alaska and Canada indicate that the hybrid composite method outperforms the other approaches. This approach presents an efficient and cost‐effective means to monitor and explore trends and patterns across broad spatial domains, and could be applied to fires in other regions, especially those with frequent cloud cover or rapid vegetation recovery.
Pharmacological Effects of Ex Vivo Mesenchymal Stem Cell Immunotherapy in Patients with Acute Kidney Injury and Underlying Systemic Inflammation
Authors: Swaminathan Madhav , Kopyt Nelson , Atta Mohamed G. , Radhakrishnan Jai , Umanath Kausik , Nguyen Sunny , O'Rourke Brian , Allen Ashley , Vaninov Natalie , Tilles Arno , LaPointe Elizabeth , Blair Andrew , Gemmiti Chris , Miller Brian , Parekkadan Biju , Barcia Rita N. 
Published: September 2021

Abstract
Mesenchymal stem cells (MSCs) have natural immunoregulatory functions that have been explored for medicinal use as a cell therapy with limited success. A phase Ib study was conducted to evaluate the safety and immunoregulatory mechanism of action of MSCs using a novel ex vivo product (SBI-101) to preserve cell activity in patients with severe acute kidney injury. Pharmacological data demonstrated MSC-secreted factor activity that was associated with anti-inflammatory signatures in the molecular and cellular profiling of patient blood. Systems biology analysis captured multicompartment effects consistent with immune reprogramming and kidney tissue repair. Although the study was not powered for clinical efficacy, these results are supportive of the therapeutic hypothesis, namely, that treatment with SBI-101 elicits an immunotherapeutic response that triggers an accelerated phenotypic switch from tissue injury to tissue repair. Ex vivo administration of MSCs, with increased power of testing, is a potential new biological delivery paradigm that assures sustained MSC activity and immunomodulation.
Analysis and Design of a Single‐Stage IsolatedDC/ACConverter for a High‐Power‐Density OnboardACInverter
Authors: Itoh Kenichi , Barrera‐Cardenas Rene , Ishigaki Masanori , Sugiyama Takahide , Isobe Takanori , Tadano Hiroshi 
Published: September 2021

This paper proposes a single‐stage DC/AC converter for the implementation of a high‐power‐density onboard AC inverter. The proposed circuit integrates a non‐isolated DC/AC converter into an isolated DC/DC converter using only simple duty control and phase‐shift modulation, which reduces the required number of semiconductor switches. Additionally, a coupling inductor and center‐tapped transformer can be shared by the two converter functions, so they can be integrated without additional circuit components. This paper describes the operating principles of the proposed converter and design solutions are extracted using multi‐objective optimization to achieve optimal performance in terms of power density and efficiency. Based on the design solution extracted through optimization, a prototype with a volume of 0.5 l was fabricated and a power density of 3.0 kW/l with an efficiency of 94.7% was achieved at a rated power of 1.5 kW. © 2021 Institute of Electrical Engineers of Japan. Published by Wiley Periodicals LLC.
Evidence of possible SARS‐CoV‐2 vertical transmission according to World Health Organization criteria in asymptomatic pregnant women
Authors: Sevilla‐Montoya R. , Hidalgo‐Bravo A. , Estrada‐Gutiérrez G. , Villavicencio‐Carrisoza O. , Leon‐Juarez M. , Villegas‐Mota I. , Espino‐y‐Sosa S. , Monroy‐Muñoz I. E. , Martinez‐Portilla R. J. , Poon L. C. , Cardona‐Pérez J. A. , Helguera‐Repetto A. C. ,   Collaborators
Published: September 2021

ABSTRACTObjectiveSevere acute respiratory syndrome coronavirus 2 (SARS‐CoV‐2) vertical transmission has been investigated extensively. Recently, the World Health Organization (WHO) published strict criteria to classify the timing of mother‐to‐child transmission of SARS‐CoV‐2 into different categories. The aim of this study was to investigate the possibility of vertical transmission in asymptomatic SARS‐CoV‐2‐positive women.MethodsPregnant women attending for delivery at a perinatology center in Mexico City, Mexico, who had a SARS‐CoV‐2‐positive nasopharyngeal swab 24–48 h before delivery, were asymptomatic at the time of the test and had an obstetric indication for Cesarean section were eligible for inclusion in this study. Amniotic fluid was collected during Cesarean delivery, and neonatal oral and rectal swabs were collected at birth and at 24 h after birth. SARS‐CoV‐2 detection was carried out using real‐time reverse‐transcription polymerase chain reaction in all samples. Relevant medical information was retrieved from clinical records. The WHO criteria for classifying the timing of mother‐to‐child transmission of SARS‐CoV‐2 were applied to the study population.ResultsForty‐two SARS‐CoV‐2‐positive asymptomatic pregnant women fulfilled the inclusion criteria. Twenty‐five (59%) women developed mild disease after discharge. Neonatal death occurred in three (7%) cases, of which one had a positive SARS‐CoV‐2 test at birth and none had coronavirus disease 2019‐related symptoms. There were five (12%) cases with strong evidence of intrauterine transmission of SARS‐CoV‐2, according to the WHO criteria, as amniotic fluid samples and neonatal samples at birth and at 24 h after birth were positive for SARS‐CoV‐2. Our results also showed that 40–60% of infected neonates would have been undetected if only one swab (oral or rectal) was tested.ConclusionThis study contributes evidence to reinforce the potential for vertical transmission of SARS‐CoV‐2 even in asymptomatic women and highlights the importance of testing more than one neonatal sample in order to increase the detection rate of SARS‐CoV‐2 in affected cases. © 2021 The Authors. Ultrasound in Obstetrics & Gynecology published by John Wiley & Sons Ltd on behalf of International Society of Ultrasound in Obstetrics and Gynecology.
Deltas in dialogue: Imagining policy transfer from the Netherlands to Vietnam and Bangladesh as a symmetrical conversation
Authors: Hasan Shahnoor , Evers Jaap , Verzijl Andres , Zwarteveen Margreet 
Published: September 2021

AbstractBased on the in‐depth study of the travels of the Dutch Delta Plan—a water‐centered strategic long‐term plan to help prepare for the effects of climate change—to Vietnam and Bangladesh, this article reflects on ways to conceptualize processes of policy transfer. Such processes involve a range of actors and actions, and hinges on the quality of the interactions and (historic) relations between them. All involved contribute experience and knowledge, working in collaboration with each other to somehow—through translation and mutual learning—create a version of the transferred policy that fits its new context. We use the article to imagine policy transfer processes in less hierarchical and more reciprocal terms, not a priori positioning those originating the transfer as superior or more advanced than those on the receiving end. To do this, the article proposes a conceptualization of policy transfer processes as symmetrical conversations: conversations in which many knowers and knowledges are mixed together to co‐produce plans and policies that are relevant and specific. Beyond better acknowledging the importance of the receivers, we hope that this conceptualization will also open up the discussion about what “good” policies (or policy knowledges) are, as well as allow for more explicit reflection about how different knowledges and knowers relate to each other in policy transfer processes.This article is categorized under:
Engineering Water > Planning Water
Human Water > Water Governance
Deciphering the mechanical properties of B‐DNA duplex
Authors: Dohnalová Hana , Lankaš Filip 
Published: September 2021

AbstractStructure and deformability of the DNA double helix play a key role in protein and small ligand binding, in genome regulation via looping, or in nanotechnology applications. Here we review some of the recent developments in modeling mechanical properties of DNA in its most common B‐form. We proceed from atomic‐resolution molecular dynamics (MD) simulations through rigid base and base‐pair models, both harmonic and multistate, to rod‐like descriptions in terms of persistence length and elastic constants. The reviewed models are illustrated and critically examined using MD data for which the two current Amber force fields, bsc1 and OL15, were employed.This article is categorized under:
Structure and Mechanism > Molecular Structures
Structure and Mechanism > Computational Biochemistry and Biophysics
Molecular and Statistical Mechanics > Molecular Dynamics and Monte‐Carlo Methods
Synthesis and crystal structure of Pb14.66Sn7.34Br26(CN2)7O2, a complex member of group 14 carbodiimides
Authors: Löber Manuel , Ströbele Markus , Meyer Hans‐Jürgen 
Published: September 2021

AbstractA mixed lead/tin bromide carbodiimide oxide was synthesized by solid‐state reaction between Pb(CN2), PbBr2, SnBr2 and SnO at 400 °C. Its monoclinic crystal structure was solved and refined in the space group C2/m by single‐crystal X‐ray diffraction from a yellow single crystal. One crystallographic site was found to be occupied by both tin and lead, in agreement with the results of energy‐dispersive X‐ray spectroscopy (EDX). The crystal structure comprises a complex network of tin/lead tetrahedra and tin/lead trigonal bipyramids linked by NCN units. In contrast to Pb(CN2), where the NCN ion is present as a cyanamide moiety, IR‐spectroscopy of the title compound revealed the carbodiimide character of the NCN ion.