bluuebunny/crossref_metadata_2025_split huggingface dataset:
CSI 2264: Simultaneous optical and X-ray variability in the pre-main sequence stars of NGC 2264
Authors: Guarcello M. G. , Flaccomio E. , Micela G. , Argiroffi C. , Sciortino S. , Venuti L. , Stauffer J. , Rebull L. , Cody A. M. 
Published: July 2019

Context. Pre-main sequence stars are variable sources. In diskless stars this variability is mainly due to the rotational modulation of dark photospheric spots and active regions, as in main sequence stars even if associated with a stronger magnetic activity.
Aims. We aim at analyzing the simultaneous optical and X-ray variability in these stars to unveil how the activity in the photosphere is connected with that in the corona, to identify the dominant surface magnetic activity, and to correlate our results with stellar properties, such as rotation and mass.
Methods. We analyzed the simultaneous optical and X-ray variability in stars without inner disks (e.g., class III objects and stars with transition disks) in NGC 2264 from observations obtained with Chandra/ACIS-I and CoRoT as part of the Coordinated Synoptic Investigation of NGC 2264. We searched for those stars whose optical and X-ray variability is correlated, anti-correlated, or not correlated by sampling their optical and X-ray light curves in suitable time intervals and studying the correlation between the flux observed in optical and in X-rays. We then studied how this classification is related with stellar properties.
Results. Starting from a sample of 74 class III/transition disk (TD) stars observed with CoRoT and detected with Chandra with more than 60 counts, we selected 16 stars whose optical and X-ray variability is anti-correlated, 11 correlated, and 17 where there is no correlation. The remaining stars did not fall in any of these groups. We interpreted the anti-correlated optical and X-ray variability as typical of spot-dominated sources, due to the rotational modulation of photospheric spots spatially coincident to coronal active regions, and correlated variability typical of faculae-dominated sources, where the brightening due to faculae is dominant over the darkening due to spots.
Conclusions. Stars with “anti-correlated” variability rotate slower and are less massive than those with “correlated” variability. Furthermore, cool stars in our sample have larger u − r variability than hot stars. This suggests that there is a connection between stellar rotation, mass, and the dominant surface magnetic activity, which may be related with the topology of the large-scale magnetic field. We thus discuss this scenario in the framework of the complex magnetic properties of weak-line T Tauri stars observed as part of recent projects.
Früherkennung und Behandlung von psychischen und psychosomatischen Erkrankungen im Betrieb
Authors: Schwarz Elena , Gündel Harald , Rothermund Eva 
Published: July 2019

ZUSAMMENFASSUNGPsychische Erkrankungen gelten in Deutschland als zweithäufigster Grund für Arbeitsunfähigkeit. Dabei kann die Arbeit selbst sowohl Belastung als auch Ressource für die Mitarbeiter sein. Positiven Einfluss auf den Krankheitsverlauf hat vor allem die frühe Erkennung und somit auch frühe Behandlung der Erkrankungen. Die Psychosomatische Sprechstunde im Betrieb (PSIB) ist ein vom Betrieb initiiertes Angebot für Mitarbeiter mit psychischen Beschwerden. Sie wird von externen Experten für seelische Gesundheit durchgeführt, gehört aber zum betrieblichen Versorgungsnetzwerk. Das so entstehende, niedrigschwellige Angebot soll Mitarbeitern den Zugang zu adäquater Behandlung erleichtern. Die enge Anbindung der Behandler an den Betrieb soll weiter die individuelle Integration von Arbeitsthemen in die Behandlung ermöglichen. Die Rahmenbedingungen der Sprechstunde, wie z. B. der Ort und die Dauer des Kontaktes, werden im Vorlauf mit dem jeweiligen Unternehmen abgestimmt. Der Fokus der Begegnung liegt auf der Vermittlung von Kontrolle und Orientierung an den Mitarbeiter. Zentrale Elemente der PSIB sind dabei zunächst die Beziehungsherstellung zwischen Behandler und Mitarbeiter sowie eine erste Diagnostik und Situationsbeschreibung. Weitere Elemente sind Wissensvermittlung und Befähigung des Mitarbeiters sowie abschließend die Planung und Begleitung nächster Schritte. Insgesamt 174 Mitarbeiter dreier Unternehmen wurden mit 194 Nutzern psychotherapeutischer Ambulanzen verglichen. Es zeigte sich eine signifikant höhere Nutzerzufriedenheit der Sprechstundenteilnehmer zu denen der Regelversorgung.
Subglottische Pathologien
Authors: Heyduck Adrienne , Pickhard Anja , Brosch Sibylle , Hoffmann Thomas K. , Reiter Rudolf 
Published: July 2019

ZusammenfassungSubglottische Pathologien sind sehr selten und manifestieren sich mit einem
unspezifischen klinischen Erscheinungsbild in Form einer Gewebevermehrung auf
Höhe des Ringknorpels bzw. der cranialen Trachea, was die Diagnose verschleiert.
Typische Symptome solcher Patienten sind Heiserkeit, Reizhusten, ein
Fremdkörpergefühl sowie Dyspnoe bzw. Stridor. Differenzialdiagnostisch kommen
verschiedene Erkrankungen in Frage: Benigne Erkrankungen wie Folgen eines
Traumas (z. B. Stenosen), Entzündungen (z. B. Pseudokrupp), rheumatische
Erkrankungen (z. B. Granulomatose mit Polyangiitis) oder gutartige Tumore (z. B.
Papillom, Hämangiom oder Granularzelltumor). Auch maligne Erkrankungen wie z. B.
ein Plattenepithelkarzinom des Larynx, ein Chondrosarkom oder sehr selten eine
laryngeale Lymphommanifestation müssen differenzialdiagnostisch in Erwägung
gezogen werden. Idiopathische Formen ohne erkennbare Ursache sind ebenfalls
denkbar. Zur Diagnosesicherung wird bei tumorösen Veränderungen in der Regel
eine Probeexzision mit histologischer Aufarbeitung durchgeführt. Die Therapie
erfolgt in Abhängigkeit vom histologischen Ergebnis – bei soliden tumorösen
Erkrankungen üblicherweise chirurgisch oder durch eine Lokal- bzw.
Systemtherapie im interdisziplinären Kontext.
Full-Squat as a Determinant of Performance in CrossFit
Authors: Martínez-Gómez Rafael , Valenzuela Pedro L. , Barranco-Gil David , Moral-González Susana , García-González Adela , Lucia Alejandro 
Published: July 2019

AbstractThis study analyzed the relationship between CrossFit performance and power and strength variables measured in the full-squat exercise. Twenty male trained subjects (33±7 years) performed an incremental load full-squat test for assessment of the 1-repetition maximum (1RM) and the mean (Pmean) and peak (Ppeak) power. Performance in 5 different Workouts of the Day (WODs) was measured on different days, and overall CrossFit performance was determined as the sum of the scores obtained in these WODs. Athletes were then assigned to a high (HP) or low (LP) performance group based on the median score for overall performance. Correlation analysis between squat variables and performance was performed and between-group differences were assessed. Moderate to strong (r=0.47–0.69, p<0.05) positive correlations were found between squat variables and performance in the different WODs. Overall CrossFit performance was strongly and positively associated with absolute (r=0.62, p=0.01) and relative 1RM (r=0.65, p=0.07), and relative Pmean (r=0.56, p=0.02) and Ppeak (r=0.53, p=0.03). Large differences (effect sizes ranging 1.1–1.7, all p<0.05) were observed between HP and LP for absolute and relative 1RM, relative Pmean, and absolute and relative Ppeak. In summary, strength and power indexes measured in a squat test are positively associated with CrossFit performance.
Protease-Activated Receptors 1 and 3 are Differentially Expressed on Human Monocyte Subsets and are Upregulated by Lipopolysaccharide Ex Vivo and In Vivo
Authors: Thaler Barbara , Hohensinner Philipp J. , Baumgartner Johanna , Haider Patrick , Krychtiuk Konstantin A. , Schörgenhofer Christian , Jilma Bernd , Hell Lena , Fischer Michael B. , Huber Kurt , Hengstenberg Christian , Speidl Walter S. , Wojta Johann 
Published: July 2019

AbstractMonocytes are activated in inflammatory conditions via a variety of cytokine receptors as well as in a procoagulatory setting through thrombin, acting upon protease-activated receptors (PARs). This study investigated the expression pattern of PAR1 and PAR3 on human monocyte subsets. Furthermore, a possible regulation of the expression of PAR1 and PAR3 in these cells by inflammatory activation were studied. CD16+ monocytes showed significantly higher levels of PAR1 and PAR3 as compared with CD16− monocytes. Ex vivo treatment of whole blood with lipopolysaccharide (LPS) increased PAR1 and PAR3 messenger ribonucleic acid (mRNA) in human monocytes. In addition, increase of PAR1 was seen in all three subsets upon LPS treatment, whereas PAR3 increased significantly only in CD16− monocytes and nonclassical CD16+ monocytes. Protein levels of PAR1 and PAR3 significantly increased on monocytes in vivo in human endotoxemia 1 hour after LPS infusion. PAR1 increased significantly in CD16− monocytes and nonclassical CD16+ monocytes. In this in vivo model, PAR3 was also significantly elevated in CD16− monocytes and increased slightly albeit not significantly in CD16+ monocytes. Endotoxemia increased plasminogen activator inhibitor-1 (PAI-1) and tissue factor (TF) expression in monocytes in humans. Pretreatment of healthy volunteers with the PAR1 antagonist vorapaxar blocked the increase in PAI-1 but not the increase in TF. We here provide new evidence for a critical role for monocytes as cellular mediators that contribute to the activation of coagulation in diseases characterized by an inflammatory state.
Urinary Ascites and Transient Intestinal Obstruction in a Preterm Infant: An Interesting Case of Posterior Urethral Valve
Authors: Mani S. , Kupferman F. , Kumar K. , Hazra S. , Sokal M. , Jean-Baptiste D. , Kim R. 
Published: July 2019

AbstractPosterior urethral valve (PUV) is the most common congenital cause of bladder outflow obstruction in male neonates. We report a preterm neonate with PUV who presented as nonimmune fetal hydrops with intestinal obstruction in the antenatal period. The mother of our patient is a 33-year-old woman who started her prenatal care at our hospital at 30 weeks' gestation. Her sonogram done at 32 weeks in our hospital revealed fetal hydrops. It showed polyhydramnios, mild pyelectasis of right kidney, normal left kidney, and fetal ascites. Amniocentesis revealed bile stained amniotic fluid. Ultrasound during the procedure showed dilated fetal bowel loops with increased echoes. Following delivery at 32 weeks postnatal exam showed ascites with absence of skin edema, pleural, or pericardial effusion. The abdominal sonogram showed distended urinary bladder and bilateral hydroureteronephrosis. Bladder catheterization was done which relieved the bladder outlet obstruction. Voiding cystourethrogram was done later which confirmed PUV and bilateral grade 5 vesicoureteral reflux. The formation of urinary ascites in PUV serves as a pop-off mechanism to relieve the intravesical and intrarenal pressure. When this happens by mechanisms other than bladder rupture, it can lead on to transient intestinal obstruction and hepatic synthetic defects.
The dynamic switch mechanism that leads to activation of LRRK2 is embedded in the DFGψ motif in the kinase domain
Authors: Schmidt Sven H. , Knape Matthias J. , Boassa Daniela , Mumdey Natascha , Kornev Alexandr P. , Ellisman Mark H. , Taylor Susan S. , Herberg Friedrich W. 
Published: July 2019

Significance
Little is known about the regulation of Leucine-rich repeat kinase 2 (LRRK2) associated with familial Parkinson’s disease (PD). To test whether the kinase domain drives LRRK2 activation, we applied the spine concept that describes the core architecture of every protein kinase. We discovered that mutation of Y2018, a regulatory spine residue, to Phe in the DFGψ motif created a hyperactive kinase similar to the PD-associated mutation G2019S. The hydroxyl moiety of Y2018 thus serves as a “brake,” stabilizing the inactive conformation; simply removing it destroys a key inhibitory hydrogen-bonding node. These data reveal an LRRK2-specific regulatory mechanism, confirming that the kinase domain functions as a classical kinase that controls overall conformational dynamics in full-length LRRK2 and drives therapeutic strategies.
dom and datives in Basque
Authors: Odria Ane 
Published: July 2019

AbstractThis paper analyzes the syntax ofdomand causee, experiencer, goal and possessor datives in Basque. It presents novel criteria distinguishing their categorical status: the possibility (i) to license Depictive Secondary Predication (DSP) and (ii) to appear as non-agreeing in contexts affected by thePerson Case Constraint(PCC). It argues that, contrary to the rest of the datives, goals are generated as PPs, since they are unable to license DSP, but able to occur as non-agreeing in PCC-affected contexts. Besides, despite exhibiting the same categorical status as causee, experiencer and possessor datives, it claims thatdomobjects are syntactically identical to canonical absolutives, as they show the same configurational as well as Case licensing pattern, which is based onv-Agree.
A xenon collisional-radiative model applicable to electric propulsion
devices: II. Kinetics of the 6s, 6p, and
5d states of atoms and ions in Hall
thrusters
Authors: Zhu Xi-Ming , Wang Yan-Fei , Wang Yang , Yu Da-Ren , Zatsarinny Oleg , Bartschat Klaus , Tsankov Tsanko Vaskov , Czarnetzki Uwe 
Published: July 2019

Abstract
Electric propulsion devices of using xenon propellant are nowadays widely adopted
for the space missions. A collisional-radiative (CR) model of xenon needs to be
developed to understand the kinetic mechanisms of the excited and energetic
species in these devices and also to support their optical diagnostics.
Previously, due to limitations in the fundamental cross section data, Xe CR
models focused on the atomic species; the ionic species, which also play
important roles for the thrusters, were not studied in detail. In our previous
paper, a fully relativistic Dirac B-spline
R-matrix method was applied to calculate the relevant cross
sections for electron collisions with the Xe+ ion. Based on
these data, a comprehensive CR model—with the kinetics of metastable and
excited levels of both Xe and Xe+ included—could be built.
The calculated density distributions of atomic and ionic levels are examined by
optical measurements in Hall thrusters in all of the four typical regions
(near-anode-, ionization-, acceleration-, and plume-region). The special kinetic
behaviors of the excited species are analyzed, and a set of rate coefficient
data used for the Xe CR model is also provided.
Improving the efficiency of power transformers insulation by modifying the dielectric paper with bacterial cellulose
Authors: Zhuravleva N M , Reznik A S , Kiesewetter D V , Stolpner A M , Smirnova E G , Khripunov A K 
Published: July 2019

Abstract
The electrophysical characteristics of experimental types of electrical insulating paper modified by bacterial cellulose made of nano-gel film Komagataeibacter xylinus, disintegrated in various ways, were studied. The advantage of composites over traditional electrical insulating paper made of pine cellulose is shown in terms of electrical and mechanical strength, sorption activity and heat resistance. The efficiency of using an industrial blender to grind bacterial cellulose has been confirmed, which significantly reduces the time of its high-quality grinding.
Structure, optical properties and resistance to laser radiation of thin barium disilicide films grown on silicon
Authors: Galkin N G , Galkin K N , Dubov V L , Fomin D V , Pyachin C A 
Published: July 2019

Abstract
Polycrystalline and oriented films of barium disilicide (BaSi2) with a thickness of up to 100 nm were formed on silicon (111) substrates by high-temperature (800 ° C) solid-phase (single-stage and two-stage) annealing. The single phase of barium disilicide films and their semiconductor nature have been proven to be below 1.25 eV according to X-ray and optical spectroscopic methods. Two preferential orientations of the BaSi2 crystallites were detected and their orientation was determined in the films formed by two-stage annealing. According to the calculations of the parameters of the crystal structure of BaSi2 films, a compression of the unit cell volume from 2.7% to 5.13% was found, depending on the cooling time to room temperature. The stability of the films to laser radiation was studied by registering the Raman spectra with a variable power of laser radiation. The maximum power density of the laser beam (3⋅109 W/m2), which does not lead to the beginning of the destruction of these films, was
determined.
Intelligent processing of acoustic emission data based on cluster analysis
Authors: Melnikov B F , Averin P I , Melnikova E A 
Published: July 2019

Abstract
In this paper, we propose to examine the neural network approach to the problem of calculating the characteristics of the deformation and fracture of metals by transforming the fuzzy clustering of pulses of acoustic emission. To solve the problem of division the metal samples into two classes (deformed and non-deformed) we separated signals from the samples using two algorithms, i.e. fuzzy clustering and neural network. 2 clusters were always formed corresponding to 2 types of signals. The error of the neural network tests was within 5%. Thus, by this approach one can achieve sub-pixel sampling of acoustic data on clusters and neural network learning algorithm for the automatic calculation of the characteristics of metals.
Machine learning and the Schrödinger equation
Authors: Pavlov A V , Serdyuk J A , Ustinov A B 
Published: July 2019

Abstract
In this research several methods of machine learning (ML), such as decision trees and linear regression were used to predict ground-state energy (GSE) of an electron in a potential well. Analysis has been done for various types of the potentials: ones with exact solution as well as ones with only numerical one. It was shown that some methods can map the analytical solution and predict GSE with chemical accuracy along with ability to find GSE for systems which does not have analytical solutions. To increase the accuracy and performance of the ML algorithms we proposed several methods of data preprocessing.
U-Net adaptation for multiple instance learning
Authors: Kots M V , Chukanov V S 
Published: July 2019

Abstract
Multiple instance learning (MIL) is a weakly supervised learning method where a single label is assigned to a group of instances. Recent advancement in neural networks makes it possible to achieve great results but the training requires many annotated examples which can be difficult to obtain. In case of medical imaging, such a method can theoretically provide voxel-level annotations basing on the image-level annotations. More precisely, taking a training dataset where each image is given with a label indicating a presence of a region of interest (ROI), the model can be trained to produce voxel labels of the object. We propose a modification of the U-Net architecture for image segmentation that can be trained on weakly labeled datasets and solves the MIL problem. The U-Net architecture is famous for being able to train on small number of samples which can further improve benefits of MIL approach. In this paper we also present results of experiments on synthetic data with investigation of stability to noise and medical images. Experimental results prove that suggested modifications improve the noise stability of the weakly supervised method.
Automatic detection of objects on star sky images by using the convolutional neural network
Authors: Bobrovsky A I , Galeeva M A , Morozov A V , Pavlov V A , Tsytsulin A K 
Published: July 2019

Abstract
The automatic detection methods of mobile objects on moving star background in the presence of high-speed image blurring are considered. The approach based on convolutional neural network YOLO v2 for detection and classification of two kinds of objects images is analysed. Estimations of detection accuracy and speed for the approach are based on convolutional neural network of a simplified structure, indicating further prospects for use of such networks.
The propagation of electromagnetic waves in ferrite-dielectric structure with metal shield
Authors: Cherepanov A S , Sochava A A , Bogachev S V 
Published: July 2019

Abstract
The paper deals with the problem of wave propagation in a rectangular waveguide containing a three-layer ferrite-dielectric-ferrite (FDF) structure located near a metal shield. This FDF structure can be used to create low-cost phased array antennas with simple electrical control of the beam position. However, the calculation of the open FDF structure encounters great difficulties. Placing the FDF structure in a rectangular waveguide allows us to obtain a strict solution for same waveguide wave modes including main mode, which have no dependence of the fields on the coordinate directed along the magnetizing field. This is the main mode of the FDF structure, which determines the general properties of the phased array. It is shown that the obtained relations describe the modes of the open FDF waveguide with high accuracy. The dependences of the mode propagation constants on the magnetizing field have been calculated, the structure of the electromagnetic field for the main and some higher order modes has been found, and the optimal parameters of the structure, which provide maximal controllability by magnetizing field, have been determined.
Error estimation of discrete formation method for optimal FTN signals
Authors: Ovsyannikova A S , Lavrenyuk I I , Makarov S B , Wei X 
Published: July 2019

Abstract
One of the branches of Faster than Nyquist (FTN) signaling providing transmission at the rate higher than “Nyquist limit” with insignificant energy losses includes optimal FTN pulses. These pulses have controllable level of intersymbol interference (ISI) and given time and spectral parameters. The efficiency of practical usage of these pulses depends on the errors of discrete formation method. In this work a guidance for estimating the minimum number of samples needed to meet the requirements for spectral and energy characteristics of optimal FTN signals is proposed. Simulation modeling and experiments with the help of vector signal generator have been held. It was found that to form optimal FTN pulse with duration Ts=2T not more than 16 samples are needed. In this case, energy losses relatively to continuous optimal FTN pulse are about 0.2 dB.
Pre-charging Characteristics Analysis and Control Strategy of Full Bridge MMC-HVDC
Authors: Yin Y J , Ning L H , Su Y , Zhao B Y , Xie C X , Zhang X L 
Published: July 2019

Abstract
Considering the FB-MMC, a generalized pre-charging strategy is proposed for the MMC-based systems. It contains two stages, no control charging and controllable charging. The circuit model of the converter is established in the no control charging stage, and the submodule capacitance can be charged to about 37% of rated voltage. During the controllable charging stage, we proposed grouping charging strategy, the blocked and bypassed strategy of each group sub-module is formulated. According to the circuit model, the capacitance voltage of each module can be charged to the rated value through this strategy. Finally, we set up a 9 level full bridge MMC-HVDC simulation system in PSCAD/EMTDC. The charging strategies are simulated, and the results show that the proposed control strategy is feasible.