bluuebunny/crossref_metadata_2025_split huggingface dataset:
Operativer und kathetergestützter Aortenklappenersatz – zwischen Evidenz und Empfehlung
Authors: Hagl Christian , Rudolph Tanja 
Published: October 2022

ZusammenfassungPatienten mit hochgradig symptomatischer Aortenklappenstenose haben unbehandelt eine reduzierte Lebenserwartung. Die operative und interventionelle Behandlung der Aortenklappe stehen als
Behandlungsoptionen zur Verfügung. Entsprechend aktueller Leitlinien der EACTS/ESC und der DGTHG/DGK ist bei jüngeren Patienten mit niedrigem operativem Risiko weiterhin der operative
Aortenklappenersatz (AKE) das Behandlungsverfahren der Wahl. Bei älteren Patienten bzw. Patienten mit erhöhtem operativem Risiko ist die interventionelle Aortenklappenimplantation (TAVI) die
präferierte Methode. Im klinischen Alltag ist neben diesen Empfehlungen aber viel entscheidender, dass nach entsprechender Vordiagnostik unter Berücksichtigung der anatomischen
Gegebenheiten, Komorbiditäten und individuellen Aspekten gemeinsam im Herzteam (repräsentiert durch eine/einen Herzchirurgen/in und interventionellen Kardiologen/in) mit dem Patienten eine
optimale individuelle Entscheidung zur Behandlung getroffen wird.
Arteriosklerose, Cholesterinspiegel und sekundäre
Pflanzenstoffe
Authors: Friedrichsen Hans-Peter 
Published: October 2022

ZusammenfassungSeit langem wird ein erhöhter Cholesterinspiegel im Blut als Ursache
für die Entstehung der Arteriosklerose postuliert und dementsprechend
auch seine medikamentöse Senkung. Allerdings zeigt sich keine direkte
Korrelation zwischen Cholesterinspiegel und kardiovaskulären Todesraten
sowie dem Einsatz von Statinen. Verschiedene Prozesse bei der
Arterioskleroseentstehung lassen sich jedoch durch Nahrungsmittel bzw.
Mikronährstoffe beeinflussen. Protektive Wirkungen zeigen insb.
sekundäre Pflanzenstoffe.
Selen in der Kardiologie
Authors: Schomburg Lutz 
Published: October 2022

ZusammenfassungEine unzureichende Versorgung mit Selen und damit ausbleibende Sättigung
der Selenoproteine erhöht deutlich das Risiko für
Herz-Kreislauf-Erkrankungen und kardiovaskulären Tod. Vegetarische oder
vegane Ernährung kann mit geringer Selenzufuhr verbunden sein,
während Schwangerschaft, Stillen, Entzündungsreaktionen und
schwere Erkrankungen den Selenbedarf steigern. Autoantikörper gegen den
Selentransporter SELENOP können zu einem funktionalen Selenmangel
führen. Uwe Gröber sprach mit Professor Schomburg über
die kardioprotektive Wirkung von Selenoproteinen sowie
zeitgemäße Labordiagnostik und Supplementierung des
Spurenelements.
Impfstoffe/Immunisierung
Authors: Gröber Uwe 
Published: October 2022

ZusammenfassungDie Entwicklung eines neuen Impfstoffs gegen Infektionskrankheiten ist ein
aufwendiger Prozess mit zahlreichen Rationalen. Nicht nur ein Impfstoff, auch
eine optimale Versorgung mit immunrelevanten (Mikro-)Nährstoffen, wie
Vitamin D, Vitamin A und Zink, kann dazu beitragen, die Qualität und
Quantität der Immunantwort auf eine Impfung zu verbessern, wie Studien
zeigen. Eine Vitamin-D-Supplementierung erwies sich auch im Hinblick auf
COVID-19 als positiv.
Feasibility of progressive polyp contraction with underwater endoscopic mucosal resection in ≥ 20 mm superficial colorectal lesions
Authors: Okada Masahiro , Shinozaki Satoshi , Nomura Tatsuma , Hayashi Yoshikazu , Morikawa Takaaki , Kitamura Masafumi , Fukuda Hisashi , Arita Munefumi , Takezawa Takahito , Sunada Keijiro , Lefor Alan Kawarai , Yamamoto Hironori 
Published: October 2022

Abstract
Background and study aims Underwater endoscopic mucosal resection (UEMR) does not always result in en bloc resection of large colorectal lesions. The aim of this study was to demonstrate the feasibility of en bloc resection with progressive polyp contraction with underwater endoscopic mucosal resection (PP-CUE) of large, superficial colorectal lesions. The advantage of PP-CUE is to enable resection of a superficial non-polypoid lesion that is larger than the snare diameter.
Patients and methods Eleven consecutive lesions in ten patients who underwent UEMR with PP-CUE of large superficial colorectal lesions (20 mm or greater) were included.
Results The median lesion diameter was 24 mm (interquartile range [IQR], 20–24 mm). All lesions were larger than the 15-mm rotatable snare that was used. Median procedure time and PP-CUE time were 11 minutes (IQR, 8.5–12.3) and 2.3 minutes (IQR, 1.9–3.4), respectively. Pathological diagnoses of resected specimens included six adenomas, three sessile serrated lesions, and two slightly invasive submucosal carcinomas. En bloc and R0 resection rates were both 91 % (10/11). No adverse events occurred.
Conclusions PP-CUE is useful to resect superficial non-polypoid colorectal lesions 20 to 25 mm in diameter in an en bloc fashion.
Accuracy of Physician Electronic Health Record Usage Analytics using Clinical Test Cases
Authors: Lo Brian , Sequeira Lydia , Strudwick Gillian , Jankowicz Damian , Almilaji Khaled , Karunaithas Anjchuca , Hang Dennis , Tajirian Tania 
Published: October 2022

AbstractUsage log data are an important data source for characterizing the potential burden related to use of the electronic health record (EHR) system. However, the utility of this data source has been hindered by concerns related to the real-world validity and accuracy of the data. While time–motion studies have historically been used to address this concern, the restrictions caused by the pandemic have made it difficult to carry out these studies in-person. In this regard, we introduce a practical approach for conducting validation studies for usage log data in a controlled environment. By developing test runs based on clinical workflows and conducting them within a test EHR environment, it allows for both comparison of the recorded timings and retrospective investigation of any discrepancies. In this case report, we describe the utility of this approach for validating our physician EHR usage logs at a large academic teaching mental health hospital in Canada. A total of 10 test runs were conducted across 3 days to validate 8 EHR usage log metrics, finding differences between recorded measurements and the usage analytics platform ranging from 9 to 60%.
Investigation of the thermal conductivity enhancement mechanism of polymer composites with carbon-based fillers by scanning thermal microscopy
Authors: Sun Wenxiang , Hamaoui Georges , Micusik Matej , Evgin Tuba , Vykydalova Anna , Omastova Maria , Gomés Séverine 
Published: October 2022

In order to elucidate the mechanism of enhancement of heat transfer in polymer composites, in this work, we investigated two types of polymer-carbon filler composites. This investigation was made using scanning thermal microscopy (SThM) with the Wollaston microprobe operated in active mode as a function of the carbon filler weight fraction within the polymer matrix. Samples consist of high-density polyethylene (HDPE) filled with 50 µm expanded graphite (EG) and polyvinylidene difluoride (PVDF) containing multiwall carbon nanotubes (MWCNTs). For HDPE/EG samples, SThM images allow the detection of zones with a thermal conductance larger than that of the matrix for the highest studied filler concentration. These zones correspond to EG filler agglomerations within the polymer and explain the observed enhancement of the thermal conductivity k of the HDPE/EG composite. For PVDF/MWCNTs samples, it is found that k increases from 0.25 W m−1 K−1 for pristine PVDF to 0.37 W m−1 K−1 for PVDF nanocomposites filled with 8 wt. % MWCNTs. This k variation vs filler concentration is found in good correspondence with that of the β phase relative percentage in the PVDF nanocomposites. This suggests that the observed heat transfer enhancement is rather due to the formation of β phase for PVDF/MWCNTs samples, resulting from the addition of MWCNTs than the addition of MWCNTs itself. Thus, tuning the thermophysical properties of polymer-based nanocomposites can establish new design laws to confer them specific thermal properties.
De dochter doet een powernap
Authors: Suijkerbuijk Michelle , Leufkens Sterre , van der Meulen Marten 
Published: October 2022

Abstract
While kinship relations in Dutch are usually introduced by a possessive determiner, Twitter users have recently been observed to use a definite article in that position. To learn more about the characteristics of this construction, we performed an
exploratory investigation of the definite article possession construction with Dutch kinship terms on Twitter. We analysed 100
tweets for 24 kinship terms each, and annotated for the type of pre-nominal modifier used. Results show that the phenomenon is far
from peripheral, as 13.2% of all selected tweets featured a definite article. The construction was most frequent with descending
and horizontal relationship terms, and with improper kin terms (i.e. terms with a non-kin meaning at least as prominent as
kinship use; Dahl & Koptsjevkaja-Tamm 2001: 202). These findings were explained by
pointing to redundancy and the comical effect of distancing the construction creates.
Homoepitaxial GaN terahertz planar Schottky barrier diodes
Authors: Liang Shixiong , Gu Guodong , Guo Hongyu , Zhang Lisen , Song Xubo , Lv Yuanjie , Bu Aimin , Feng Zhihong 
Published: October 2022

Abstract
In this work, a new type of terahertz Schottky barrier diode (SBD) based on homoepitaxial gallium nitride (GaN) was fabricated for high-power and high-frequency multiplier applications. The measured full width at half maximum of x-ray diffraction peaks for homoepitaxial GaN (002) and (102) plane is only one third of the heteroepitaxial GaN on sapphire substrate. Additionally, the increased electron mobility in both n−/n+ GaN epitaxial layers, induced by improved material quality, can effectively reduce the epitaxial resistance (R
epi) and the spreading resistance. As a result, the total series resistance of the fabricated GaN SBD is 13.7 Ω, which is only 65% of that of heteroepitaxial GaN on a sapphire substrate. Additionally, the cut-off frequency (f
c) is improved to 1.61 THz at zero bias voltage and the measured breakdown voltage is 16.17 V at −1 μA.
Temperature compensation methods of spin-exchange relaxation-free co-magnetometer
Authors: Wu Jiaqi , Liu Feng , Fan Wenfeng , Du Pengcheng , Quan Wei 
Published: October 2022

Abstract
According to the temperature characteristics of spin-free exchange relaxation (SERF) co-magnetometer, three temperature compensation methods are proposed in this paper, including particle swarm optimization radial basis function (PSO-RBF) neural network, Gaussian regression and least squares support vector basis. The effectiveness of the three compensation methods is verified by experiments and compared with the back-propagation (BP) neural network optimized by a genetic algorithm compensation method. In order to improve the effect of temperature compensation, this paper also conducts correlation and cluster analysis on the different positions temperature and output signals of the SERF co-magnetometer, and selects the data of temperature points that are closely related to signal bias changes for model training. Through experimental comparison with traditional linear compensation and BP neural network compensation methods, it is found that PSO-RBF neural network has advantages in training speed, compensation accuracy and robustness. Experiments show that PSO-RBF neural network temperature compensation algorithm improves the stability of the SERF co-magnetometer by more than 53

%

at room temperature or under artificially imposed temperature changes.
Digital instantaneous frequency measurement with wide bandwidth for real-valued waveforms using multiple sub-Nyquist channels
Authors: Liu Shang , Wang Lulu , Lin Weibin , Cui Yong , Wang Chen , Song Xiao 
Published: October 2022

Abstract
In order to break through the bandwidth limitation of digital instantaneous frequency measurement for a real-valued waveform, we developed a frequency estimator with a high dynamic range and low computation cost using multiple sub-Nyquist analog to digital converter (ADC) channels. The procedures of the proposed scheme are as follows: (a) perform zero-crossing detection on the real-valued signal and use multiple sub-Nyquist ADC channels to sample the output signal; (b) take several samples of each channel to calculate the folded frequency; (c) use the frequency residuals of each channel to reconstruct the frequency based on the Chinese remainder theorem. Finally, the algorithm robust analysis and simulation experiments are performed, demonstrating that the scheme of this paper has relatively good anti-noise ability and dynamic adaptability.
Gas path fault diagnosis for gas turbine engines with fully operating regions using mode identification and model matching
Authors: Huang Dawen , Ma Shixi , Zhou Dengji , Jia Xingyun , Peng Zhike , Ma Yushan 
Published: October 2022

Abstract
Gas path fault diagnosis is key to improving the reliability and safety of gas turbine engines. Flexible operating conditions bring obstacles to performing accurate gas path performance analysis. Most of the existing methods are developed for specific operating conditions, which are difficult to adapt to fully operating regions. The operating mode identification and targeted diagnostic model matching are effective technologies to solve the gas path fault diagnosis under fully operating regions, which improves diagnostic accuracy and efficiency. The fully operating regions are classified into four typical operating modes, and the targeted diagnostic models are matched according to the mode features. For the typical start-stop state and high dynamic state, the small deviation diagnostic model and transient diagnostic model are established and verified by real fault cases. The small deviation diagnostic model based on boundary parameters reduces the influences of operating conditions on diagnostic results, it accurately monitors the health states. The transient diagnostic model driven by the dynamic model and a designed hybrid solution algorithm markedly improves diagnostic accuracy and efficiency. It shows better performance for the mixed gas path fault modes, more stable diagnostic results, and higher diagnostic efficiency. The proposed technical framework provides an effective way for the fault diagnosis of gas turbine engines under fully operating regions.
Power balance analysis at the L-H transition in JET-ILW NBI-heated deuterium plasmas
Authors: Vincenzi P , Solano E R , Delabie E , Bourdelle C , Snoep G , Baciero A , Birkenmeier G , Carvalho P , Cavedon M , Chernyshova M , Citrin J , Fontdecaba J M , Hillesheim J C , Huber A , Maggi C , Menmuir S , Parra F I 
Published: October 2022

Abstract
The understanding of the physics underlying the L-H transition has strong implications for ITER experimental reactor and demonstration power plant (DEMO). In many tokamaks, including JET, it has been observed that, at a particular plasma density, n
e,min, the power necessary to access H-mode PL-H is minimum. In the present work, L-H transitions of JET deuterium plasmas heated by neutral beam injection (NBI) are studied for the first time by means of a power balance analysis to characterize the main contributions in the transition, through integrated transport modelling. In the pulses analysed, we do observe a minimum of the L-H power threshold in density, indicating the presence of density branches and of n
e,min. Electron and ion heat fluxes at the transition are estimated separately. The electron/ion equipartition power results in favour of the ions, as shown by QuaLiKiz quasilinear gyrokinetic simulations, which predict a larger ion transport that causes T
e > T
i. The resulting edge ion heat flux also shows a clear change of slope below n
e,min, similarly to ASDEX-Upgrade (AUG) NBI pulses (Ryter et al 2014 Nucl. Fusion
54 083003). JET NBI data are compared to radio-frequency heated AUG and Alcator C-mod pulses (Schmidtmayr et al 2018 Nucl. Fusion
58 056003), showing a different trend of the power, coupled to ions at the L-H transition with respect to the linearity observed in the radio-frequency heated plasmas. The presence of n
e,min and the role of the ion heat flux is discussed in the paper, although it seems it is not possible to explain the presence of a PL-H minimum in density by a critical ion heat flux and by the equipartition power for the JET NBI-heated plasmas analysed.
Linking emergent phenomena and broken symmetries through one-dimensional objects and their dot/cross products
Authors: Cheong Sang-Wook , Huang Fei-Ting , Kim Minhyong 
Published: October 2022

Abstract
The symmetry of the whole experimental setups, including specific sample environments and measurables, can be compared with that of specimens for observable physical phenomena. We, first, focus on one-dimensional (1D) experimental setups, independent from any spatial rotation around one direction, and show that eight kinds of 1D objects (four; vector-like, the other four; director-like), defined in terms of symmetry, and their dot and cross products are an effective way for the symmetry consideration. The dot products form a Z2 × Z2 × Z2 group with Abelian additive operation, and the cross products form a Z2 × Z2 group with Abelian additive operation or Q8, a non-Abelian group of order eight, depending on their signs. Those 1D objects are associated with characteristic physical phenomena. When a 3D specimen has symmetry operational similarity (SOS) with (identical or lower, but not higher, symmetries than) an 1D object with a particular phenomenon, the 3D specimen can exhibit the phenomenon. This SOS approach can be a transformative and unconventional avenue for symmetry-guided materials designs and discoveries.
System dynamics approach for sustainable housing development
Authors: Kumari Rashmi 
Published: October 2022

Abstract
The provision of quality housing in adequate quantity is a major concern for planners in the developing regions. There is need of rapid housing development to meet the need of growing population while giving attention towards its minimal environmental impact. This paper focuses on the sustainable housing development using system dynamics model in the study area of Patna district, India. The optimum housing development has been suggested on the basis of result of analysis of various scenarios generated by performing simulation using control parameters in the formulated model. The environmental impact, like air pollution; noise; waste generation; water consumption; and energy consumption, due to the suggested housing development scenario has been discussed thoroughly, based upon which recommendations have been given. The findings of this research will be useful in providing solutions for the sustainable housing development to meet the growing demand as well as reduction of its adverse environmental impact in the study area.
Methodology for the Evaluation of Environmental Costs in Thermal Generation in Peru
Authors: Zamata Jessica Meza , Auccahuasi Wilver , Herrera Lucas , Mejia César Santos , Grados Juan , Dianderas Ciro Teran , Nolorbe Juan Mendoza , Zamata Edilberto Calcina , Rubiños Santiago , Rojas Karin , Ovalle Christian , Revilla Jorge Figueroa , Loza Ana Barrera , Ichpas Ruben Quispe 
Published: October 2022

Abstract
Evaluating the costs of electricity generation is important to be able to estimate the variable costs, characterized by the maintenance costs of the generation, transmission and distribution systems. In this work we evaluate the plants that use Camisea natural gas, which is an alternative to the plants that use fossil fuels, not only in terms of costs, but also in terms of the levels of contamination that they cause. The method presented can be taken as a reference for other evaluation mechanisms with similar characteristics.
Tribological performance of Ni-Cr-B-Si coatings deposited via laser cladding process
Authors: Sousa Jurandir Marcos Sá de , de Souza Pinto Pereira Adriano , Silva Rafael Gomes Nunes , Pereira Milton , de Medeiros Castro Richard , Curi Elvys Isaías Mercado , Machado Paulo Cordeiro 
Published: October 2022

Abstract
Ni-Cr-B-Si alloy coatings deposited by the laser cladding process have high tribological resistance, good metallurgical bonding with the substrate, and an interesting set of mechanical properties. Aiming to correlate microstructure and the mechanical behavior of coatings in wear environments, three coatings were deposited over an ASTM A36 carbon steel substrate, them being C1 (1.05 kW–5 mm s−1), C2 (1.40 kW–21.7 mm s−1), and C3 (1.75 kW–30 mm s−1). The microstructure and microhardness of the coatings were analyzed, the former by using SEM and EDS. Ball-on-disk tests were performed to determine wear and friction coefficients. In order to evaluate the worn surfaces, SEM-EDS techniques were also employed. The different solidification rates affected the behavior of microstructure and microhardness. Coating C1, deposited with a lower cooling speed, provided a longer dwell time for the nucleation and growth of Cr-carbides (CrC) in the Ni-matrix, a factor that gave it a lower dilution, higher carbide concentration, and higher microhardness when compared to C2 and C3. In the ball-on-disk test, coatings with higher concentration and CrC size presented a higher variaton of their friction coefficient, but a lower volumetric loss and wear coefficient. Analysis of the worn surfaces showed that the CrC characteristics, deterioration of tribolayers, and coating material detachment close to the solidification cracks were the main features that change the coatings’ tribological performance.
High-conductivity screen-printable silver nanowire Ink for optically transparent flexible radio frequency electronics
Authors: Vaseem Mohammad , Akhter Zubair , Li Weiwei , Yarali Emre , Anthopoulos Thomas D , Shamim Atif 
Published: October 2022

Abstract
Optically transparent conductors have paved the way in various optoelectronic and radio frequency devices where high electrical conductivity and optical transparency with mechanical flexibility, as well as large area fabrication are deemed necessary. Printing techniques are viable for fabricating large-area devices with high mechanical flexibilities. However, the preparation of suitable inks and printing recipes is essential to achieve a high electrical conductivity and transparency. In this study, the best tradeoff between conductivity and optical transmittance was achieved through silver (Ag) nanowires (NWs)-based ink formulation with tuned Ag NW loading, solvent compositions and polymer weight percentages. The ink was deposited through screen-printing, which enabled a large-area and high-resolution patterning of the AgNWs. The washing time of the post-printed films exhibited a decisive effect on the initial conductivity, which was further improved through photonic sintering. During the photonic sintering, the voltages, pulse lengths (μs) and fire rates (Hz) were optimized to obtain the best conductivity of the printed films. Maximum optical transparencies of 78% and 83% were achieved for the conductivities of ∼5.88 × 106 and ∼6.25 × 106 S m−1, respectively. As a proof of concept, a fully printed optically transparent antenna was realized that could operate in a wide frequency band suitable for high-data-rate wireless communication.