bluuebunny/crossref_metadata_2025_split huggingface dataset:
Time‐domain principal component reconstruction (tPCR): A more efficient and stable iterative reconstruction framework for non‐Cartesian functional MRI
Authors: Wang Fei , Hennig Jürgen , LeVan Pierre 
Published: February 2020

PurposeTo improve the reconstruction efficiency (i.e., computational load) and stability of iterative reconstruction for non‐Cartesian fMRI when using high undersampling rates and/or in the presence of strong off‐resonance effects.Theory and MethodsThe magnetic resonance encephalography (MREG) sequence with 3D non‐Cartesian trajectory and 0.1s repetition time (TR) was applied to acquire fMRI datasets. Different from a conventional time‐point‐by‐time‐point sequential reconstruction (SR), the proposed time‐domain principal component reconstruction (tPCR) performs three steps: (1) decomposing the k‐t‐space fMRI datasets into time‐domain principal component space using singular value decomposition, (2) reconstructing each principal component with redistributed computation power according to their weights, and (3) combining the reconstructed principal components back to image‐t‐space. The comparison of reconstruction accuracy was performed by simulation experiments and then verified in real fMRI data.ResultsThe simulation experiments showed that the proposed tPCR was able to significantly reduce reconstruction errors, and subsequent functional activation errors, relative to SR at identical computational cost. Alternatively, at fixed reconstruction accuracy, computation time was greatly reduced. The improved performance was particularly obvious for L1‐norm nonlinear reconstructions relative to L2‐norm linear reconstructions and robust to different regularization strength, undersampling rates, and off‐resonance effects intensity. By examining activation maps, tPCR was also found to give similar improvements in real fMRI experiments.ConclusionThe proposed proof‐of‐concept tPCR framework could improve (1) the reconstruction efficiency of iterative reconstruction, and (2) the reconstruction stability especially for nonlinear reconstructions. As a practical consideration, the improved reconstruction speed promotes the application of highly undersampled non‐Cartesian fast fMRI.
Reference values for the motor unit number index and the motor unit size index in five muscles
Authors: Cao Bei , Gu Xiaojing , Zhang Lingyu , Hou Yanbing , Chen Yongping , Wei Qianqian , Ou Ruwei , Shang Huifang 
Published: February 2020

AbstractIntroductionFew reference values have been established for the motor unit number index (MUNIX) and motor unit size index (MUSIX). In this study we aimed to investigate the features of MUNIX in healthy individuals for five muscles.MethodsWe measured the MUNIX in the right abductor pollicis brevis (APB), abductor digiti minimi (ADM), biceps brachii (BB), tibialis anterior (TA), and trapezius (TR) muscles.ResultsThe study enrolled 76 male and 74 female participants. The mean MUNIX and mean MUSIX of the right APB, ADM, BB, TA, and TR muscles were 191.0 ± 43.6, 179.1 ± 38.8, 179.7 ± 36.2, 152.1 ± 38.8, and 166.1 ± 40.7; and 60.4 ± 12.5, 59.3 ± 13.7, 43.8 ± 11.5, 41.3 ± 10.7, and 49.1 ± 15.2, respectively. MUNIX in these five muscles was inversely related to age.DiscussionThe establishment of reference values for MUNIX and MUSIX in five muscles may help in monitoring the progression of neuromuscular diseases.
Associations between changes in resilient coping and posttraumatic stress disorder symptoms
Authors: Sinclair Vaughn G. , Adams Susan M. , Dietrich Mary 
Published: February 2020

AbstractThe pervasive, damaging nature of posttraumatic stress disorder (PTSD) presents enormous clinical challenges. Understanding the relationship between patients’ perceptions of PTSD symptoms and resilient coping strategies may prompt investigation of clinical interventions that improve adaptive, resilient coping skills. In this study, we examined whether changes in resilient coping were related to changes over time in the PTSD symptoms of intrusion and avoidance. A secondary analysis was conducted using longitudinal data from the community‐based Washington State Twin Registry. Participants completed the four‐item Brief Resilient Coping Scale (BRCS) and the Avoidance and Intrusion subscales of the Impact of Events Scale (IES) at two points in time that were at least 2 years apart. To limit analyses to participants reporting PTSD symptoms at baseline, an initial value of at least 1.0 on either Avoidance (n = 1,337) or Intrusion (n = 1,206) was required for inclusion in the sample. Using linear regression, we assessed associations of change in BRCS with a change in IES scores, controlling for the respective initial scores on each measure. Controlling for initial BRCS and IES‐Intrusion values, we observed a small, statistically significant association between change in BRCS and change in IES‐Intrusion scores (b* = −0.07; p = .003). There was no statistically significant association between change in BRCS and change in IES‐Avoidance (b* < 0.01; p = .869). In this large, longitudinal sample, increases in resilient coping were related to decreases in intrusive thoughts over time. Because coping patterns can be taught, these results warrant further investigations into adaptive coping patterns associated with diminishing PTSD symptoms.
Polyphosphazene microspheres modified with transition metal hydroxystannate for enhancing the flame retardancy of polyethylene terephthalate
Authors: Li Shuai , Li Teng , Wang Xuan , Zhong Yi , Zhang Linping , Wang Bijia , Feng Xueling , Sui Xiaofeng , Xu Hong , Chen Zhize , Mao Zhiping 
Published: February 2020

AbstractA novel PZS@CS hybrid structure was synthesized for enhancing the flame retardancy of polyethylene terephthalate (PET). The PZS@CS hybrids showed significant flame retardance. For example, the incorporation of 6 wt% PZS@CS obviously brought about an 8.8% increase of limiting oxygen index value (29.3%) and passed the vertical burning test UL‐94 V‐0 level, accompanied with the sharp reduction of heat and smoke release. The flame retardant mechanism of PZS@CS hybrids was fully studied by the Thermogravimetric Analysis (TGA), pyrolysis‐gas chromatography‐mass spectrometry, and Raman methods, and the results showed that the improvement of flame retardancy was mainly ascribed to the synergistic effect of PZS and CS phases in both the condensed and the gas phase. Rheological results showed that PZS@CS hybrids improved the melt complex viscosity of PET composites and the well compatibility of PET matrix and PZS@CS hybrids was also proved by the improvement of mechanical properties.
An overview of synthetic modification of nitrile group in polymers and applications
Authors: Sruthi Pambingal Rajan , Anas Saithalavi 
Published: February 2020

AbstractThe physicochemical properties of polymers are mainly dependent on the nature of polymer backbone and/or pendant groups linked to the main chain. Therefore, synthetic modification of these functional groups via post functionalization is an important approach for obtaining novel polymeric systems with improved properties and targeted applications. In this context, the synthetic modifications of nitrile group in polymers into various useful functionalities have received considerable attention and several interesting applications of the resulting polymers have been identified. The majority of the studies are based on Polyacrylonitrile (PAN), and some isolated examples of nitrile functionalization in copolymers such as Poly (Styrene‐co‐Acrylonitrile) (SAN), Poly (Acrylonitrile‐co‐Butadiene‐co‐Styrene (ABS) and Nitrile Rubber (NBR) are available. These synthetic modifications are mainly accomplished by the reactions such as Nucleophilic addition, cycloaddition, reduction, and hydrolysis using various reagents. These studies describing the post‐polymerization modifications of nitrile group in polymers reported during the last three decades are covered in this review.
Stabilization of a class of nonlinear uncertain ordinary differential equation by parabolic partial differential equation controller
Authors: Benabdallah Abdallah 
Published: February 2020

SummaryThis article is concerned with stabilization for a class of uncertain nonlinear ordinary differential equation (ODE) with dynamic controller governed by linear 1−d heat partial differential equation (PDE). The control input acts at the one boundary of the heat's controller domain and the second boundary injects a Dirichlet term in ODE plant. The main contribution of this article is the use of the recent infinite‐dimensional backstepping design for state feedback stabilization design of coupled PDE‐ODE systems, to stabilize exponentially the nonlinear uncertain systems, under the restrictions that (a) the right‐hand side of the ODE equation has the classical particular form: linear controllable part with an additive nonlinear uncertain function satisfying lower triangular linear growth condition, and (b) the length of the PDE domain has to be restricted. We solve the stabilization problem despite the fact that all known backstepping transformation in the literature cannot decouple the PDE and the ODE subsystems. Such difficulty is due to the presence of a nonlinear uncertain term in the ODE system. This is done by introducing a new globally exponentially stable target system for which the PDE and ODE subsystems are strongly coupled. Finally, an example is given to illustrate the design procedure of the proposed method.
A Markovian jump system approach to consensus of heterogeneous multiagent systems with partially unknown and uncertain attack strategies
Authors: Xu Zhenhua , Ni Hongjie , Reza Karimi Hamid , Zhang Dan 
Published: February 2020

SummaryThe problem of robust leader‐following consensus of heterogeneous multiagent systems subject to deny‐of‐service attacks is investigated, where attack strategies are partially unknown and uncertain to defender. A Markovian jump system approach is proposed, that is, capable of describing the occurrence of different attack strategies, and the occurring probability of each attack strategy is represented by the transition probability of the Markovian jump model. Then, sufficient conditions are derived such that the output tracking performance can be guaranteed. In order to design the controller gains, some slack matrices are introduced, which can provide some design freedom. Finally, it is shown that the controller design results can be applied to the multivehicle position‐tracking system. The simulation results reveal that the consensus performance is much better if one has more statistics information on attacks.
Robust adaptive fault‐tolerant quantized control of nonlinear systems with constraints on system behaviors and states
Authors: Zhao Kai , Lei Ting , Lin Ting , Chen Long 
Published: February 2020

SummaryIn this work, we develop a robust adaptive fault‐tolerant tracking control scheme for a class of input‐quantized strict‐feedback nonlinear systems in the presence of error/state constraints and actuation faults. The problem is rather complicated yet challenging if nonparametric uncertainties and unknown quantization parameters as well as time‐varying yet completely undetectable actuation faults are involved in the considered systems. Compared with the most existing approaches in the literature, the proposed control exhibits several attractive advantages: (1) upon using a nonlinear decomposition for quantized input and employing the robust technique for actuation fault, not only the exact knowledge of quantization parameters are not required, but also the actuation fault can be easily compensated since neither fault detection and diagnosis/fault detection and identification nor controller reconfiguration is needed; (2) based on the error/state‐dependent unified nonlinear function, the constraints on tracking error and system states are directly handled and the cases with or without constraints can also be addressed in a unified manner without changing the control structure; and (3) the utilization of unified nonlinear function‐based dynamic surface control not only avoids the problem of the explosion of complexity in traditional backstepping design, but also bypasses the demanding feasibility conditions of virtual controllers. Furthermore, by using the Lyapunov analysis, it is ensured that all signals in the closed‐loop systems are uniformly ultimately bounded. The effectiveness of the developed control algorithm is confirmed by numerical simulations.
Gravity Drawing of Micro‐ and Nanofibers for Additive Manufacturing of Well‐Organized 3D‐Nanostructured Scaffolds
Authors: Yadavalli Nataraja S. , Asheghali Darya , Tokarev Alexander , Zhang Weizhong , Xie Jin , Minko Sergiy 
Published: February 2020

AbstractThis work introduces a gravity fiber drawing (GFD) method of making single filament nanofibers from polymer solutions and precise alignment of the fibers in 3D scaffolds. This method is advantageous for nanofiber 3D alignment in contrast to other known methods. GFD provides a technology for the fabrication of freestanding filament nanofibers of well‐controlled diameter, draw ratio, and 3D organization with controllable spacing and angular orientation between nanofibers. The GFD method is capable of fabricating complex 3D scaffolds combining fibers with different diameters, chemical compositions, mechanical properties, angular orientations, and multilayer structures in the same construct. The scaffold porosity can be as high as 99% to secure transport of nutrients and space for cell infiltration and differentiation in tissue engineering and 3D cell culture applications.
Safety of non‐steroidal anti‐inflammatory drugs in postpartum period in women with hypertensive disorders of pregnancy: systematic review and meta‐analysis
Authors: Bellos I. , Pergialiotis V. , Antsaklis A. , Loutradis D. , Daskalakis G. 
Published: February 2020

ABSTRACTObjectiveTo assess the effect of non‐steroidal anti‐inflammatory drugs (NSAIDs) on blood pressure when administered for postpartum analgesia in women with hypertensive disorders of pregnancy.MethodsMEDLINE, Scopus, CENTRAL,
Clinicaltrials.gov and Google Scholar databases were searched systematically from inception to 5 December 2019 for studies evaluating the safety of postpartum NSAIDs in women with any gestational hypertensive disorder. Randomized controlled trials (RCTs) and cohort studies were eligible for inclusion. Case–control studies, case series and case reports were excluded. The primary outcomes of interest were the incidence of severe hypertension and systolic, diastolic and mean arterial blood pressure. Pooled estimates were obtained by fitting a random‐effects statistical model. The quality of evidence was assessed according to Grading of Recommendations, Assessment, Development and Evaluations (GRADE) guidelines.ResultsTen studies were included, comprising five RCTs and five retrospective cohort studies and involving a total of 1647 women. All studies were evaluated qualitatively and eight of them were included in the quantitative meta‐analysis. Administration of NSAIDs was not associated with a significantly higher risk of severe postpartum hypertension (odds ratio, 1.52 (95% CI, 0.77–3.01)). Similarly, no significant differences were found in postpartum systolic blood pressure (mean difference (MD), –3.03 mmHg (95% CI, –6.21 to 0.15 mmHg)) and mean arterial pressure (MD, –0.38 mmHg (95% CI, –1.88 to 1.11 mmHg)) between women who received NSAIDs and those who did not, whereas postpartum diastolic blood pressure was marginally lower in women treated with NSAIDs (MD, –2.28 mmHg (95% CI, –4.44 to –0.13 mmHg)). The same effects were observed when studies with a large sample size, RCTs, women with severe pre‐eclampsia and studies using ibuprofen as the study drug and acetaminophen as the control treatment were examined separately. The credibility of evidence was judged to be very low according to GRADE, owing to concerns about study limitations, inconsistency and imprecision.ConclusionsThis meta‐analysis suggests that postpartum administration of NSAIDs is not associated with elevated blood pressure in women with hypertensive disorders of pregnancy. However, the existing evidence is of very low quality, thus future large‐scale RCTs are warranted to verify the safety of postpartum NSAIDs in this population. Copyright © 2020 ISUOG. Published by John Wiley & Sons Ltd.
Representation of wind turbine blade responses in power production load cases by linear mode shapes
Authors: Gözcü Ozan , Stolpe Mathias 
Published: February 2020

AbstractThe wind turbine industry is designing large MW size turbines with very long blades, which exhibit large deflections during their operational life. These large deflections decrease the accuracy of linear models such as linear finite element and modal‐based models, in which the structure is represented by linear mode shapes. The aim of this study is to investigate the competence of the mode shapes to represent the large blade responses in normal operation load cases. For this purpose, blade deflections are projected onto the linear modal space, swept by mode shape vectors. The projection shows the contribution of each mode and the projection error. The blade deflections are calculated by a nonlinear aero‐servo‐elastic solver for power production fatigue load cases with normal turbulence. The mode shapes are calculated at the steady‐state deflected blade position computed at different wind speeds. Three reference turbine blades are used in the study to evaluate the effects of various blade design parameters such as length, stiffness, mass, and prebend. The results show that although the linear mode shapes can represent the flapwise and edgewise deflections accurately, axial and torsional deflections cannot be captured with good accuracy. The geometric nonlinear effects are more apparent in the latter directions. The results indicate that the blade deflections occur beyond the linear assumptions.
Logarithmic forms and differential equations for Feynman integrals
Authors: Herrmann Enrico , Parra-Martinez Julio 
Published: February 2020

Abstract
We describe in detail how a d log representation of Feynman integrals leads to simple differential equations. We derive these differential equations directly in loop momentum or embedding space making use of a localization trick and generalized unitarity. For the examples we study, the alphabet of the differential equation is related to special points in kinematic space, described by certain cut equations which encode the geometry of the Feynman integral. At one loop, we reproduce the motivic formulae described by Goncharov [1] that reappeared in the context of Feynman integrals in [2–4]. The d log representation allows us to generalize the differential equations to higher loops and motivates the study of certain mixed-dimension integrals.
On the BPS Spectrum of the rank-1 Minahan-Nemeschansky theories
Authors: Distler Jacques , Martone Mario , Neitzke Andrew 
Published: February 2020

Abstract
The F-theory realization of the rank-1 Minahan Nemeschansky (MN) E6, E7 and E8 theories leads to a description of the BPS states on the Coulomb branch in terms of Type IIB (p, q)-string networks. Subject to a simple ansatz for the types of networks which can occur, we study the representations of the flavor symmetry group which occur in the BPS spectrum. The results we find for the E6 and E7 theories are in perfect agreement with previous calculations by other methods (in particular, we find that arbitrarily large representations occur), but our scheme is easier to implement and more computationally efficient. The string network picture also gives a possible explanation of the experimental observation that in rank-1 MN theories, BPS states whose charge is n times a primitive charge occur with BPS index divisible by (−1)n+1n.
Probing the decoupled seesaw scalar in rare Higgs boson decay
Authors: Gao Yu , Jin Mingjie , Wang Kechen 
Published: February 2020

Abstract
The Higgs boson can mix with a singlet scalar that dynamically generates the Majorana mass of the right-handed neutrino NR. We show that even a tiny mixing between the Higgs boson and a ‘decoupled’ singlet scalar allows for Higgs-mediated pair production of NR without significant mixings between the active neutrinos and NR, and thus testable at colliders via a characteristic signal of two same-sign same-flavor lepton pairs, plus missing energy. We demonstrate that this search channel is mostly background- free in pp-collision and can be a highly sensitive probe of the Higgs-singlet mixing at the current and future pp colliders. Such channel provides a clean signal to discover the singlet scalar and explore the origin of neutrino masses.
Algorithms and tools for iterated Eisenstein integrals
Authors: Duhr Claude , Tancredi Lorenzo 
Published: February 2020

Abstract
We present algorithms to work with iterated Eisenstein integrals that have recently appeared in the computation of multi-loop Feynman integrals. These algorithms allow one to analytically continue these integrals to all regions of the parameter space, and to obtain fast converging series representations in each region. We illustrate our approach on the examples of hypergeometric functions that evaluate to iterated Eisenstein integrals as well as the well-known sunrise graph.
Störungseinsicht bei körperdysmorpher Störung, Zwangsstörung und sozialer Angststörung
Authors: Schulte Johanna , Dietel Fanny A. , Buhlmann Ulrike 
Published: February 2020

Zusammenfassung
Hintergrund
Die körperdysmorphe Störung (KDS) geht mit einer geringen Störungseinsicht bis zu wahnhaft anmutenden Überzeugungen bezüglich wahrgenommener körperlicher Makel einher, die für andere nur leicht oder nicht sichtbar sind. Während die Einsicht bei der KDS bereits vielfach untersucht wurde und obwohl sie ein transdiagnostisch relevantes Merkmal ist, gibt es kaum vergleichende Studien.

Ziel der Arbeit
Es wird untersucht, inwiefern sich Personen mit einer KDS von Personen mit einer Zwangsstörung (ZS) und einer sozialen Angststörung (SAS) dimensional und kategorial hinsichtlich der Einsicht unterscheiden.

Material und Methode
Personen mit KDS (n = 36), ZS (n = 38) und SAS (n = 36) beantworteten diagnostische Interviews und Fragebogen. Die Einsicht wurde mithilfe eines teilstrukturierten Interviews, das verschiedene Facetten und Grade von Einsicht erfasst, beurteilt (Brown Assessment of Beliefs Scale).

Ergebnisse
In allen Gruppen lagen unterschiedliche Einsichtsgrade im gesamten Spektrum von exzellent bis fehlend vor. Bei den Betroffenen mit einer KDS entsprach der Gesamtmittelwert einer schlechten (M = 13,25, SD ± 6,32), bei Betroffenen mit einer SAS einer ausreichenden (M = 10,39, SD ± 5,70) und bei Betroffenen mit einer ZS einer guten Einsicht (M = 4,74, SD ± 5,49). Abgesehen von einer stärkeren Fixiertheit der Überzeugung bei KDS war die Einsicht bei KDS und SAS dimensional und kategorial nicht signifikant voneinander verschieden, jedoch bei beiden Störungen schlechter als bei ZS.

Diskussion
Die Ergebnisse bestätigen, dass die KDS mit geringer Einsicht einhergeht, dies jedoch fast gleichermaßen auf die SAS zutrifft. Die Störungseinsicht erscheint bei allen untersuchten Störungen relevant und sollte in der Psychotherapie von Beginn an diagnostisch und psychotherapeutisch berücksichtigt werden.