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Fatal bleeding due to an aorto-esophageal fistula: A case report and literature review

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World Journal of Clinical Cases 2022年第31期10卷 11493-11499页

作者： Davorin Ćeranić Sara Nikolić Jernej Lučev Aleš Slanič Tatjana Bujas Andreja Ocepek pavel Skok Department of Gastroenterology Internal Medicine ClinicUniversity Medical Centre MariborMaribor 2000Slovenia Department of Radiology University Medical Centre MariborMaribor 2000Slovenia Department of Pathology University Medical Centre MariborMaribor 2000Slovenia

BACKGROUND Aorto-esophageal fistula is an extremely rare cause of acute upper gastrointestinal bleeding(UGIB).CASE SUMMARY We present a case of an 80-year-old woman with esophageal cancer who was admitted to our department with hemorrhagic shock due to *** the diagnostic procedure,emergency computed tomography angiography was performed and confirmed aorto-esophageal *** radiologists inserted a stent graft into the aorta,successfully closing the ***,the patient later died of heart failure following irreversible hemorrhagic *** confirmed the aorto-esophageal fistula,which formed 1 cm below the distal edge of the stent previously inserted into the esophagus for a malignant *** There are very rare causes of *** clinical decisions are made during the diagnostic workup of these patients,we must be aware of the limitations of various therapeutic options,even the most contemporary.

关键词： Aorto-esophageal fistula Upper gastrointestinal bleeding Interventional radiology Stent graft Case report

Modeling of cold-temperate tree Pinus koraiensis (Pinaceae) distribution in the Asia-Pacific region: Climate change impact

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Forest Ecosystems 2022年第2期9卷 160-167页

作者： Tatyana Y.Petrenko Kirill A.Korznikov Dmitry E.Kislov Nadezhda G.Belyaeva pavel V.Krestov Botanical Garden-Institute FEB RAS Makovskogo St.142Vladivostok690024Russia Institute of Geography RAS Staromonetniy 24-4Moscow119017Russia

Background:Pinus koraiensis Siebold&Zucc.(Korean pine)is a key species of the mixed cold temperate forests of Northeast *** climate change can significantly worsen the quality of *** habitats and therefore lead to a large-scale structural and functional transformation of the East Asian mixed *** built a species distribution model(SDM)for *** using the random forest classifier–a versatile machine learning al-gorithm,to discover overlap areas of potential species occurrence in the climate condition of the Last Glacial Maximum(~21,000 year before present)and in the projected future climates(2070 year),from which possible permanent refugia for *** were ***:Using the random forest supervised learning algorithm,we developed models of the modern distribution of *** in accordance with the five selected bioclimatic variables(Kira’s warmth and coldness indices,the index of continentality,the rain precipitation index,and the snow precipitation index).In addition to current climatic conditions,we performed this analysis for the climate of the Last Glacial Maximum and for the future projected climate(2070)under scenarios RCP2.6 and *** the predictors,the rain index appears to be the most *** land area estimates with high suitability for *** was 303,785 km 2 under current climatic conditions,586,499 km 2 for the Last Glacial Maximum,and 337,573 km^(2) for the future(2070)period under the RCP2.6 scenario,and 397,764 km^(2) under the RCP8.5 ***:Most of the potential range of *** during the Last Glacial Maximum was located outside the current distribution area of the *** climatically suitable *** habitats will likely disappear in the western part of its modern *** the southern part of the range,which includes glacial refugia,the areas of continuous distribution of the *** populations since the end of the Pleistocene are expected to

关键词： Climate change Bioclimatic modeling Species distribution model Korean pine Northeast Asia

Detecting lithium plating dynamics in a solid-state battery with operando X-ray computed tomography using machine learning

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npj Computational Materials 2023年第1期9卷 1402-1410页

作者： Ying Huang David Perlmutter Andrea Fei-Huei Su Jerome Quenum pavel Shevchenko Dilworth Y.Parkinson Iryna V.Zenyuk Daniela Ushizima Department of Materials Science&Engineering University of California IrvineIrvineCaliforniaUSA National Fuel Cell Research Center University of California IrvineIrvineCaliforniaUSA Applied Math and Computational Research Division Lawrence Berkeley National LaboratoryBerkeleyCaliforniaUSA Department of Chemical&Biomolecular Engineering University of California IrvineIrvineCaliforniaUSA Department of Electrical Engineering and Computer Sciences College of EngineeringUniversity of California BerkeleyBerkeleyCaliforniaUSA Advanced Photon Source Argonne National Laboratory9700 South Cass AvenueLemontIllinoisUSA Advanced Light Source Lawrence Berkeley National LaboratoryBerkeleyCaliforniaUSA Berkeley Institute for Data Science University of California BerkeleyBerkeleyCaliforniaUSA

Operando X-ray micro-computed tomography(µCT)provides an opportunity to observe the evolution of Li structures inside pouch *** is an essential step to quantitatively analyzingµCT datasets but is challenging to achieve on operando Li-metal battery datasets due to the low X-ray attenuation of the Li metal and the sheer size of the ***,we report a computational approach,batteryNET,to train an Iterative Residual U-Net-based network to detect Li *** resulting semantic segmentation shows singular Li-related component changes,addressing diverse morphologies in the *** addition,visualizations of the dead Li are provided,including calculations about the volume and effective thickness of electrodes,deposited Li,and redeposited *** also report discoveries about the spatial relationships between these *** approach focuses on a method for analyzing battery performance,which brings insight that significantly benefits future Li-metal battery design and a semantic segmentation transferrable to other datasets.

关键词： battery lithium state

Exact Solution for Equilibrium Configurations of Two-Component Plasma Confined between Parallel Plates

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Journal of Applied Mathematics and Physics 2022年第10期10卷 2883-2894页

作者： Michael Grinfeld pavel Grinfeld The U.S. Army Research Laboratory WMRD Aberdeen Proving Ground USA Department of Mathematics Drexel University Philadelphia USA

It is the fifth part of the study published under the common umbrella of “The Gibbs Variational Method in Thermodynamics of Equilibrium Plasma”. In Parts 1 - 4, we formulated a novel approach to thermodynamics of one- and two-component heterogeneous systems completely or partially filled with a liquid substance in the plasma state. The approach is based on the use of Gibbs variational principles, and it enables efforts to address a variety of problems relating to the equilibrium and stability of such systems. In this fifth part, the results of Parts 1 - 4 are applied to the analysis of equilibrium configurations of a two-component charged plasma trapped between two parallel plates (the geometry often used in various applications).

关键词： Plasma Thermodynamics Gibbs Variational Principles Plasma Stability Equations of State

Deformable Permanent Ferroelectric or Ferromagnetic Media

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Journal of Applied Mathematics and Physics 2023年第10期11卷 3061-3074页

作者： Michael Grinfeld pavel Grinfeld The U.S. Army Research Laboratory WMRD Aberdeen Proving Ground USA Mathematics Department Drexel University Philadelphia USA

In the framework of continuum mechanics, one of possible consistent definitions of deformable permanent magnets is introduced and explored. Similar model can be used for ferroelectric substances. Based on the suggested definition, we establish the key kinematic relationship for the deformable permanent magnet and suggest the simplest master system, allowing to analyze behavior of such substances.

关键词： Ferroelectric and Ferromagnetic Media Thermodynamic Consistency The Aleph Tensor Boundary Value Problems of Electro- and Magnetostatics and Quasi-Statics

Shock Fronts in Non-Polar Electro-Conducting Media

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Journal of Applied Mathematics and Physics 2022年第4期10卷 1055-1065页

作者： Michael Grinfeld pavel Grinfeld The U.S. Army Research Laboratory Aberdeen Proving Ground Harford County USA Department of Mathematics Drexel University Philadelphia USA

We analyze the propagation of electromagnetic fronts in unbounded electric conductors. Our model is based on the Maxwell model of electromagnetism, which includes the displacement current and Ohm’s law in its simplest forms. The shock-like electromagnetic front is a propagating surface, across which the electric and magnetic fields, as well as their higher temporal and spatial derivatives, experience finite jumps. The shock-like fronts are essentially different as compared with the weak fronts;in particular, the bulk Maxwell equations are essentially insufficient for the analysis of the shock-like fronts, and they should be amended we the physical jump conditions. We choose these additional conditions by using conditions similar to those suggested by Heaviside. We derive the basic shock intensity relationships implied by this model.

关键词： Electric Current in Conductors Boundary Value Problems Exact Solution Ray-Equations

Selected aspects of dielectric behavior of plasma sprayed titanates

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Journal of Advanced Ceramics 2012年第1期1卷 50-59页

作者： pavel CTIBOR Josef SEDLACEK Institute of Plasma Physics ASCRv.v.i.Za Slovankou 3PragueCzech Republic Department of Electrotechnology Faculty of Electrical EngineeringCzech Technical UniversityTechnicka 2PragueCzech Republic

XRD measurements were carried out on plasma sprayed titanates BaTiO_(3),CaTiO_(3),MgTiO_(3)and a mixture of the last *** were tested as dielectrics and volume resistivities of the materials were also *** microscopy was used for mapping of the dielectric response of selected *** results show differences in the crystal structure between plasma sprayed coatings and feedstock powders in the case of BaTiO_(3)and MgTiO_(3)whereas CaTiO_(3)is crystalograffically identical with its *** reason can be found in larger sensitivity of BaTiO_(3)and MgTiO_(3)to the reductive conditions at plasma spraying whereas CaTiO_(3)seems to be rather inert from this *** CaTiO_(3)exhibits anomalous dielectric losses because of intrinsic conductivity.

关键词： plasma spraying dielectric properties electrical properties BaTiO3 and titanates capacitors

Weak Wavefront Solutions of Maxwell’s Equations in Conducting Media

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Journal of Applied Mathematics and Physics 2022年第1期10卷 190-199页

作者： Michael Grinfeld pavel Grinfeld The U.S. Army Research Laboratory WMRD Aberdeen Proving Ground Harford County USA Mathematics Department Drexel University Philadelphia USA

We analyze the propagation of electromagnetic fronts in unbounded electric conductors. Our analysis is based on the Maxwell model of electromagnetism that includes the displacement current and Ohm’s law in its simplest forms. A weak electromagnetic front is a propagating interface at which the electromagnetic field remains continuous while its first- and higher-order derivatives experience finite jump discontinuities. Remarkably, analysis of such fronts can be performed autonomously, i.e. strictly in terms of the quantities defined on the front. This property opens the possibility of establishing exact analytical solutions of the exact Maxwell system along with the evolution of the front.

关键词： Electric Current in Conductors Irreversible Thermodynamics Alegra Verification Boundary Value Problems Exact Solution

Supersonic Flow Structure in the Entrance Part of a Mixing Chamber of 2D Model Ejector

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Journal of Thermal Science 2003年第4期12卷 344-349页

作者： Vaclav Dvorak pavel Safarik Technical University in Liberec Faculty of Mechanical Engineering Department of Power Engineering Equipment. Halkova 6461 17 Liberec Czech RepublicCzech Technical University in Prague Faculty of Mechanical Engineering 207.1 Institute of Fluid Dynamics and Power Engineering Division of Fluid Dynamics and Thermodynamics. Technicka 4 166 07 Praha 6 Czech Republic

The paper deals with experimental and numerical results of investigation into supersonic and transonic flow past a two-dimensional model ejector. Results of optical measurements show a flow structure and flow parameter development in the entrance part of the mixing chamber of the ejector. Numerical results are obtained by means of both the straight solution of shock waves in supersonic flow field using classical relations of parameters of shock waves and the Fluent 6 program. Results of numerical solutions are compared with experimental pictures of flow fields. Flow structure development in the mixing chamber is analysed in detail.

关键词：冲击波剪切层边界层分离超音速流超音速喷射