bluuebunny/crossref_metadata_2025_split huggingface dataset:
Correlation of early contrast-enhanced ultrasound parameters with
postoperative graft function and at six months after kidney
transplantation
Authors: Taut Tina , Kurz Felix , Schlemmer Heinz-Peter , Meinzer Clara , Mahler Christoph , Speer Claudius , Benning Louise , Göth Daniel , Nusshag Christian , Sommerer Claudia , Schaier Matthias , Zeier Martin , Morath Christian , Kälble Florian 
Published: November 2024

Abstract
Purpose We analyzed which contrast-enhanced ultrasound (CEUS) parameters
are associated with reduced kidney function in the early postoperative period
and are prognostic for kidney function six months after transplantation.
Materials and Methods This prospective observational study included 74
patients in whom quantitative CEUS analysis and Doppler ultrasound were
performed early after kidney transplantation (10±6 days). For each region of
interest (ROI) the time-to-peak intensity (TTP) and the respective delta between
ROIs within interlobar artery, cortex, and medulla were compared. Results were
correlated with kidney function at the time of imaging and six months later.
Results Patients with an eGFR<30 ml/min at the time of investigation
had significantly slower cortical enhancement with a longer cortical TTP (cTTP:
16.1±0.9 vs. 11.7±0.7 sec, p<0.001), as well as a significant delay between
the arterial and cortical phases (c–a), as shown in longer ∆TTP (c–a): 8.2±0.9
vs. 4.2 ± 0.5 sec, p<0.001. There was a significant negative correlation
between cTTP and eGFR with a correlation coefficient of −0.37 (p<0.001), as
well as between ∆TTP (c–a) and eGFR with a correlation coefficient of −0.40
(p<0.001). Reduced kidney function after 6 months correlated significantly
with the findings of the initial CEUS examination (p=0.005, correlation
coefficient −0.39).
Conclusion CEUS revealed significant differences in temporal enhancement
dynamics in patients with reduced kidney function after transplantation.
Quantitative CEUS might therefore be able to depict graft function regarding
microvascular damage and be of prognostic value regarding long-term renal
outcomes.
Blood Loss in Women of Childbearing Potential Taking Oral Anticoagulants for Venous Thromboembolism (The BLEED Study)
Authors: Grandone Elvira , Mastroianno Mario , Pacilli Gabriella , Colaizzo Donatella , Margaglione Alessandra , Bikdeli Behnood , Piazza Gregory 
Published: November 2024

Background Oral anticoagulants (OAC) may exacerbate menstrual bleeding in women of childbearing age; however, the existing literature on this issue has several limitations.
Materials and Methods This study investigates abnormal uterine bleeding in women of childbearing age taking OAC–vitamin K antagonists or direct oral anticoagulants–for venous thromboembolism through a retrospective analysis of prospectively collected data. Uterine bleeding was assessed using the Pictorial Blood Assessment Chart (PBAC) and hemoglobin (Hb) values during anticoagulation compared with prior therapy. The number of unplanned medical visits for bleeding complications was also calculated.
Results From June 2014 to November 2023, 110 women were recruited (median age, 36 years). PBAC scores correlated with Hb values at baseline and during therapy (analysis of variance [ANOVA], p < 0.01), with a significant difference in Hb values before and during anticoagulant therapy (delta Hb) among groups (ANOVA, p.0.034). Seventeen women (15.5%) reported uterine fibroids, experiencing a greater reduction in Hb values during anticoagulant administration than women without uterine fibroids (delta 0.3, interquartile range [IQR]: 0.8, 2.9 vs. 0.5, IQR 1.2, 0.3; p.0.012). Women with selfreported uterine fibroids required more frequent unplanned medical consultations for bleeding (mean visits 5 vs. 4, respectively; Poisson regression, p < 0.05). Among women with uterine fibroids, those taking apixaban showed smaller Hb changes than those on other oral anticoagulants (ANOVA, p.0.047). This difference persisted even after adjusting for potential confounders (multiple ANOVA, p.0.004).
Conclusion Women of childbearing age taking OAC frequently experience changes in Hb values and PBAC scores during treatment, with uterine fibroids playing a significant role.
Stent misdeployment and factors associated with failure in endoscopic ultrasound-guided choledochoduodenostomy: analysis of the combined datasets from two randomized trials
Authors: Chen Yen-I , Long Clara , Sahai Anand V. , Napoleon Bertrand , Donatelli Gianfranco , Kunda Rastislav , Martel Myriam , Chan Shannon M. , Arcidiacono Paolo G. , Lam Eric , Kongkam Pradermchai , Forbes Nauzer , Larghi Alberto , Mosko Jeffrey D. , Van der Merwe Schalk , Gan Seng Ian , Jacques Jeremie , Kenshil Sana , Ratanachu-Ek Thawee , Miller Corey , Saxena Payal , Desilets Etienne , Sandha Gurpal , Alrifae Yousef , Teoh Anthony Y. B. ,   on behalf of the ELEMENT and DRA-MBO working groups
Published: November 2024

Abstract
Background Stent misdeployment (SMD) is a feared and poorly characterized technical challenge of endoscopic ultrasound (EUS)-guided choledochoduodenostomy (CDS) using lumen-apposing stents. We aimed to ascertain the rate of stent misdeployment in EUS-CDS for malignant distal biliary obstruction (MDBO) and describe its outcomes while identifying variables associated with its occurrence.
Method This was a post hoc analysis of two randomized controlled trials comparing EUS-CDS vs. endoscopic retrograde cholangiopancreatography in MDBO. The primary end point was rate of SMD, classified as misdeployment of the distal flange (type I), proximal flange (type II), contralateral bile duct wall injury (type III), or double mucosal puncture (type IV). Multivariable analysis was performed to identify variables associated with SMD and/or technical failure, and with clinical failure or stent dysfunction.
Results 152 patients were included. Technical success was 93.4 %. SMD occurred in 11 patients (7.2 %; 95 %CI 3.1 %–11.4 %): 8 type I, 1 type II, and 2 type III. Endoscopic salvage of SMD was successful in 81.8 %. Misdeployment led to adverse events in four patients (two mild, two moderate), giving an overall SMD-related adverse event rate of 2.6 % (95 %CI 0.7 %–6.6 %). On multivariable analysis, extrahepatic bile duct diameter of ≤ 15 mm was associated with increased odds of SMD and/or technical failure.
Conclusion SMD was relatively common in EUS-CDS and was associated with an extrahepatic bile duct diameter of ≤ 15 mm. The majority of misdeployments could be rescued endoscopically with low risk for adverse events.
Design and Implementation of Tabletop Cybersecurity Simulation for Health Informatics Graduate Students
Authors: Blanchard Erin E. , Feldman Sue S. , White Marjorie Lee , Allen Ryan , Phillips Thad , Brown Michelle R. 
Published: November 2024

Abstract
Background Experiential learning through simulation allows students to apply didactic knowledge to real-world situations. Tabletop simulation allows for the exploration of a variety of topics, including cybersecurity in health care. Due to its low frequency, yet high-risk nature, simulation is a perfect educational modality to practice responding to a cybersecurity attack. As such, the authors designed and executed a tabletop cybersecurity simulation consisting of a prebriefing, four rounds of injects detailing potential cybersecurity breaches that students must address, and structured debriefings that included input from cybersecurity content experts. This simulation was performed in 2018, 2019, 2022, and 2023, during graduate Health Informatics (HI) students' residential visits.
Objective The simulation allowed opportunities for HI students to apply knowledge of cybersecurity principles to an unfolding tabletop simulation containing injects of scenarios they may encounter in the real world.
Methods Survey data were used to assess the students' perceptions of the simulation. Topics assessed included overall satisfaction, teamwork and communication, and length of the event. Additionally, in 2022 and 2023, data were collected on psychological safety and whether to include them in future HI residential visits.
Results Eighty-eight graduate HI students took part in the cybersecurity simulation over four annual residential visits. Most students were satisfied with the event, found it valuable, and could see it impacting their future practice as informaticists. Additionally, students indicated high levels of psychological safety. Multiple students requested that additional simulations be incorporated into the curriculum.
Conclusion A tabletop cybersecurity simulation was utilized to allow HI students the ability to apply knowledge related to cybersecurity breaches to real-world examples. The simulation's best practices of prebriefing, psychological safety, and structured debriefing with expert feedback were emphasized in the simulation's design and implementation. Students found the simulation valuable and worth including in the curriculum.
Vesical Varices: An Unusual Cause of Hematuria
Authors: Baby Akhil , Singhal Praveen , Ahmed Nisar , Singh Shobhit , Philips Cyriac Abby , Rajesh Sasidharan 
Published: November 2024

AbstractPortal hypertension is a common complication of cirrhosis and may lead to the formation of venous collateral channels. Usually, varices due to portal hypertension develop in the lower esophagus, stomach, rectum, or other parts of the digestive tract. Extraintestinal ectopic varices are rare. Here, we present a patient with ectopic urinary bladder varices, who presented with hematuria and symptomatic anemia. The bleeding was managed with minimally invasive endovascular approach.
Streamer propagation dynamics in a nanosecond pulsed surface dielectric barrier discharge in He/N2 mixtures
Authors: Hübner Gerrit , Wilczek Sebastian , Schoeneweihs Nils , Filla Dominik , Mussenbrock Thomas , Korolov Ihor 
Published: November 2024

Abstract
An atmospheric pressure surface dielectric barrier discharge in helium–nitrogen mixtures is investigated experimentally using phase-resolved optical emission spectroscopy and computationally employing a two-dimensional simulation framework. A good qualitative agreement between experiments and simulations is found. It is shown that by applying microsecond or nanosecond driving voltage waveform pulses, the discharge exhibits filamentary or homogeneous structures. The time evolution/propagation of the homogeneous surface ionization wave for different nitrogen admixtures, pressures, and applied voltage is studied and analyzed. Both, simulations and experiments indicate that for the positive applied voltage pulse, a streamer possessing the typical dynamics of the positive streamer is ignited on the powered side of the electrode. At the same time, on the grounded sides, two streamers are formed: one possessing the dynamics of a negative streamer, which propagates towards the center of the cell of the electrode grid, and a positive one in the opposite direction. It is also shown that the positive streamers on the powered side are partly responsible for the velocity of the negative streamers on the grounded side. Simulations show a deceleration of the negative streamers as soon as two positive streamers collide and then close to the meeting point vanish due to the repulsive electrostatic interactions between them. Additionally, from the time-resolved measurements of the emission signal, the quenching rate constants of the He–I (3 s) 3S1 state by collisions with helium and nitrogen are determined to be

9
(
±
4
)
×

10

−
12

cm3 s−1 and

3
(
±
1
)
×

10

−
10

cm3 s−1, respectively at

T
=
400
±
50

K.
Systematic study on the influence of inductive chargers on active personal dosemeters
Authors: Ketelhut Steffen , Zutz Hayo , Hupe Oliver 
Published: November 2024

Abstract
Electromagnetic compatibility testing plays an important role in the type testing of radiation protection dosemeters in view of technical developments and the associated increase in electromagnetic fields. Lately, the use of inductive charging devices has grown as a user-friendly type of charging mobile-phones. In this article, we investigate their impact on active personal dosemeters (APD). The measurements show a substantial additional dose reading of up to several tens of mSv when exposed to the field of an inductive charger for 20 s. According to the widely used Qi standard, the charging devices operate at frequencies of between 87 kHz and 205 kHz for power transfers between 5 W and 30 W. These parameters fall outside the scope of type-testing standards for APD. An update of the standards might therefore be necessary.
A novel TDE error compensation method based on manipulator time-delay control
Authors: Li Fei , Qi Chongwen , Chen Weinan , Ma Li , Qiao Shishuai 
Published: November 2024

Abstract
The classic model-free controller, the time delay controller (TDC), operates under complex conditions with large external disturbance changes and suffers from time delay estimation (TDE) errors, which can lead to reduced controller performance. To compensate for the TDE error, a novel compensator is proposed in the TDC framework by considering the TDE error as a separate disturbance term. This compensator innovatively combines a gradient error compensator and a disturbance observer to correct fast-time-varying TDE errors using the gradient error compensator and slow-time-varying TDE errors using the disturbance observer. Furthermore, a high-order time delay observer (HOTDEO) is designed based on the first-order disturbance observer. Compared to the first-order and second-order observers, the HOTDEO has a lower steady-state error. The designed high-order time delay compensator is used as a supplementary term for traditional TDC and applies to various TDC frameworks. Additionally, the stability theory for both the observer and controller is analyzed in detail, and their convergence conditions are verified. Finally, simulation and experimental results demonstrate that the proposed high-order time delay compensator significantly improves the tracking accuracy and robustness of the control algorithm, particularly in terms of TDE error compensation. This research provides valuable contributions to the further development of TDC in the field.
Transfer twin support matrix machine using rescaled pinball loss for roller bearing fault diagnosis
Authors: Wang Meng , Gao Jingwei , Tang Anbo , Pan Haiyang 
Published: November 2024

Abstract
The support matrix machine (SMM) takes matrix-based data as input elements, which can protect the structural information of matrix-based data extracted from vibration signals and has good classification performance. However, in practical applications, due to the limitation of mechanical equipment and monitoring technology, there is often an insufficient number of annotation samples for SMM to find the optimal hyperplane. Therefore, a novel transfer twin SMM (TTSMM) is proposed in this article. In TTSMM, the structural information from the source data is transferred to the target model by simultaneously training on both the source and target data, which helps to establish a high-performance model using a limited number of labeled samples. Furthermore, a rescaled pinball loss function is used in TTSMM, which is bounded and utilizes quantile distance to further improve the generalization ability of the model. Finally, the proposed method is implemented on two kinds of roller bearing fault data sets including the variable speed vibration signal from Anhui University of Technology (AHUT) and the constant speed vibration signal from Case Western Reserve University (CWRU). The experimental results show that TTSMM effectively utilizes samples from both the source and target domains for modeling and has superior classification ability with a limited number of labeled samples.
On the very weak solution to the Navier–Stokes equations
Authors: Ding Huiting , Tan Wenke 
Published: November 2024

Abstract
In this paper, we establish a supercritical criterion to distinguish Leray–Hopf weak solutions from very weak solutions. Moreover, we also establish a localized version of Galdi’s theory in Galdi (2019 Proc. Am. Math. Soc.
147 5349–59) and extend the localized Ladyzhenskaya–Prodi–Serrin criterion from weak solutions to very weak solutions.
Electron and muon dynamics in neutron stars beyond chemical equilibrium
Authors: Kopp Joachim , Opferkuch Toby 
Published: November 2024

Abstract
A neutron star harbors 𝒪(1056) electrons in its core, and almost the same
number of muons, with muon decay prohibited by Pauli blocking. However, as macroscopic properties
of the star such as its mass, rotational velocity, or magnetic field evolve over time, the
equilibrium lepton abundances (dictated by the weak interactions) change as well. Scenarios where
this can happen include spin-down, accretion, magnetic field decay, and tidal deformation. We
discuss the mechanisms by which a star disrupted in one of these ways re-establishes lepton
chemical equilibrium. In most cases, the dominant processes are out-of-equilibrium Urca reactions,
the rates of which we compute for the first time. If, however, the equilibrium muon abundance
decreases, while the equilibrium electron abundance increases (or decreases less than the
equilibrium muon abundance), outward diffusion of muons plays a crucial role as well. This is true
in particular for stars older than about 104 yrs whose core
has cooled to ≲ 20 keV. The muons decay in a region where
Pauli blocking is lifted, and we argue that these decays lead to a flux of
𝒪(10 MeV) neutrinos. Realistically, however, this flux
will remain undetectable for the foreseeable
future.
Intermediately coupled type-II superconductivity in a La-based kagome metal La3Al
Authors: Yu 于 Yingpeng 英鹏 , Liu 刘 Zhaolong 兆龙 , Chen 陈 Zhaoxu 昭旭 , Li 李 Qi 琦 , Wang 王 Yulong 玉龙 , Wang 王 Xuhui 旭辉 , Gong 龚 Chunsheng 春生 , Zhuang 庄 Zhaotong 照通 , Ruan 阮 Bin-Bin 彬彬 , Ren 任 Huifen 会芬 , Sun 孙 Peijie 培杰 , Guo 郭 Jian-Gang 建刚 , Jin 金 Shifeng 士锋 
Published: November 2024

Abstract
We present a comprehensive investigation into the superconducting properties of La3Al, a La-based metal with a kagome structure. La3Al crystallizes in a Ni3Sn-type crystal structure (space group P63/mmc), where the La atoms form a kagome lattice. Resistivity measurements reveal superconducting transition with

T
c

onset

=
6.37

K and

T
c

zero

=
6.18

K. In magnetic susceptibility measurements, the superconducting transition is observed at 6.16 K. The lower and upper critical fields are determined to be 22.17 mT and 6.69 T, respectively. Heat capacity measurements confirm the bulk superconductivity, showing a normalized specific heat change of ΔC
e / (γT
c) = 2.16 and an electron–phonon coupling strength of λ
ep = 0.92. DFT calculations reveal the intricate band structure of La3Al. The notable specific heat jump, coupled with the electron–phonon coupling strength λ
ep, indicates that La3Al exhibits characteristics of an intermediately coupled type-II superconductor.
Improving concrete structures with engineered cementitious composites and kevlar sheets: an affordable retrofitting solution for earthquake resistance
Authors: Anbazhagan Praveena , Pachaiappan Thamilselvi 
Published: November 2024

Abstract
This paper outlines experimental and analytical studies focused on strengthened concrete specimens using Engineered Cementitious Composites and use of Kevlar sheets is highlighted as one of the most effective techniques for achieving the desired structural reinforcement and extending the lifespan of structures. The research examines the mechanical properties of retrofitted concrete and material characterizations of ECC such as Scanning Electron Microscopy and Energy dispersive x-ray analyses were also carried out to corroborate the durability properties of ECC and Kevlar-wrapped specimens, specifically assessing compressive, tensile, and flexural strength. In this study, fiber-reinforced cementitious materials featuring a 2% volume fraction of hybrid fibers comprising hooked-end steel and polyvinyl alcohol fibers were employed to strengthen the concrete structure. This additional layer enhances tensile strength and aids in crack management, necessitating proper curing to ensure strength gain over a specified duration. Kevlar fabric sheets are carefully applied to the ECC surface using resin to create a strong bond between the Kevlar and the underlying material, resulting in a durable retrofitted structure. Preliminary experimental data supported numerical modelling of the specimens using finite element analysis. The numerical results regarding the retrofitted strength of hardened concrete were compared with experimental outcomes. The findings showed that the maximum load of the strengthened samples increased by 6.5%. Additionally, the retrofitted strength prior to complete failure rose by 10.6%. In conclusion, the integration of hybrid fibers for reinforcement and Kevlar for retrofitting proves to be a cost-effective and straightforward approach.
Multi-objective optimization in EDM of functionally graded Fe-Al using grey relational analysis
Authors: Shubber Fatima L , Al-Shafaie Saad Hameed , Radhi Nabaa S 
Published: November 2024

Abstract
Functionally Graded Materials (FGMs) are multipurpose materials with a specific goal of managing changes in structural, thermal, or functional qualities. They feature a spatial variation in microstructure and/or composition. The current work prepared three layers of sample with different chemical compositions of Fe-Al FGM (50 Al-50 Fe, 45 Al-55 Fe, and 40 Al-60 Fe) at. % produced by powder metallurgy, then studied the machining behavior of these samples. The literature on the machining behavior of FGM was reviewed, and the influence of electrical discharge machine (EDM) process parameters such as voltage (V), current (I), pulse-on time, and pulse-off time on performance characteristics (material removal rate (MRR), tool wear rate (TWR), and surface roughness (Ra)) was investigated. The optimal machining settings for Fe-Al FGM samples will be ascertained by use of Grey Relational Analysis (GRA), which is based on the Taguchi approach, after an experimental investigation of the L18 orthogonal array design of trials. The GRA findings verify that V 140 volts, Ip10 A, Ton 100 μs, and Toff 75 μs is the optimal combination of process parameters. It has been found that the voltage is more significantly affected than the rest of the input parameters to obtain greater material removal rate (MRR) and lower tool wear rate (EWR) and surface roughness (Ra) through the response table. According to the study, choosing the right process parameters can improve the multi-performance feature.
Experimental study on fire characteristics of urban rectangular tunnels based on different slopes
Authors: Zhou Xueyong , An Ke , Wang Zhenwei , Qiao Dan , Li Linjie , Li Shilei 
Published: November 2024

Abstract
To explore the combustion pattern and temperature distribution law of urban rectangular tunnels when a fire occurs. Considering the influence of variables such as different firepower, fire source spacing, and tunnel slope, the vertical and horizontal flame combustion patterns and tunnel temperature distribution of double fire sources under different slopes were studied by the indoor model experiment method. The results show that under the same conditions of the fire source spacing ratio μ, when the slope of a rectangular tunnel is between 0% and 3%, the influence of dual flames combustion morphology on tunnel slope is relatively small; When the tunnel slope is 4% to 5%, that has a significant impact on the combustion morphology of dual flames, and the flames are more dispersed and sparse than the tunnel slope is between 0% and 3%. As the tunnel slope increases, a high-temperature zone forms at the top of the tunnel and gradually moves towards the uphill direction of the tunnel, the high-temperature area gradually decreases as the slope increases with the same μ. The research results provide a theoretical basis for the fire protection design standards and fire prevention measures of urban rectangular tunnels.