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Severe liver trauma with complex portal and common bile duct avulsion:A case report and review of the literature

World Journal of Clinical Cases 2023年第16期11卷 3837-3846页

作者： Bianca Mitricof Alin Kraft Florentina Anton Alexandru Barcu Darina Barzan Carmen Haiducu vladislav Brasoveanu Irinel Popescu Cosmin Alec Moldovan Florin Botea Medicine Doctoral School Titu Maiorescu University of BucharestBucharest 040441Romania Department of General Surgery Regina Maria Military Emergency HospitalBrasov 500007Romania Faculty of Medicine Carol Davila University of Medicine and PharmacyBucharest 050474Romania Dan Setlacec Center for General Surgery and Liver Transplant Fundeni Clinical InstituteBucharest 022328Romania Department of Medical-Surgical and Prophylactic Disciplines Faculty of MedicineTitu Maiorescu University of BucharestBucharest 031593Romania Department of General Surgery Witting Clinical HospitalBucharest 010243Romania

BACKGROUND Given its size and location,the liver is the third most injured organ by abdominal *** to recent advances,it is unanimously accepted that the nonoperative management is the current mainstay of treatment for hemodynamically stable ***,those patients with hemodynamic instability that generally present with severe liver trauma associated with major vascular lesions will require surgical ***,an associated injury of the main bile ducts makes surgery compulsory even in the case of hemodynamic stability,thereby imposing therapeutic challenges in the tertiary referral hepato-biliopancreatic centers’*** SUMMARY We present the case of a 38-year-old male patient with The American Association for the Surgery of Trauma grade V liver injury and an associated right branch of portal vein and common bile duct avulsion,due to a crush *** patient was referred to the nearest emergency hospital and because of the hemorrhagic shock,damage control surgery was performed by means of ligation of the right portal vein branch and right hepatic artery,and hemostatic ***,the patient was referred immediately to our tertiary hepato-bilio-pancreatic *** performed depacking,a right hepatectomy and Roux-en-Y *** the 9th postoperative day,the patient developed a high output anastomotic bile leak that required a redo of the *** postoperative period was marked by a surgical incision site of incomplete evisceration that was managed non-operatively by negative wound *** follow-up was optimal,with no complications at 55 *** In conclusion,the current case clearly supports that a favorable outcome in severe liver trauma with associated vascular and biliary injuries is achieved thru proper therapeutic management,conducted in a tertiary referral hepato-bilio-pancreatic center,where a stepwise and complex surgical approach is mandatory.

关键词： Severe Liver Trauma Avulsion Right portal vein Common bile duct Case report

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Visual pathways involvement in clinically isolated syndrome in children

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International Journal of Ophthalmology(English edition) 2015年第2期8卷 382-384页

作者： vladislav Voitenkov Natalia Skripchenko Andrey Klimkin Scientific Research Institute of Children's Infections Professora Popova 9

AIM: To investigate extent and nature of visual pathways involvement in children with clinically isolated syndrome(CIS).METHODS: Forty-seven patients(age 11-17y) with CIS, which later proved to be multiple sclerosis(MS)onset, and 30 controls underwent visual evoked potentials(VEP) investigation within 12 d from the appearance of the first signs of disease. Latency and amplitude of P100 peak were compared with normative data and between ***: In 58% patients, including those without signs of retrobulbar neuritis, significant slowing of conduction along the central visual pathways(P100latency lengthening) is seen. P100 amplitudes drop(signs of axonal damage) are registered less frequently(29% cases).CONCLUSION: The results indicate that visual pathways are often affected in the MS onset; mostly demyelination signs are seen. Despite MRI significance for MS diagnostic, VEPs proved to be still effective in early diagnosis of MS in children.

关键词： visual evoked potentials multiple sclerosis clinically isolated syndrome children visual pathway

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The Many Faces of Gravity

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Journal of High Energy Physics, Gravitation and Cosmology 2020年第4期6卷 817-827页

作者： Robert sadykov Department of Scientific Research TATNEFT Almetyevsk Russia

We show that the number of different gravitational effects is significantly greater than previously thought. First of all, it turned out that the observed constancy of the speed of light relative to the surrounding masses is a special case of a previously unknown fundamental gravitational effect related to the action of gravitation on the speed of light. In other words, the constancy of the speed of light becomes an integral part of gravitation. Moreover, it turned out that the increase in inertial mass and the dilation of the proper time of particles that were accelerated relative to the surrounding masses are also consequences of this fundamental gravitational effect. All of these secondary effects are in the same row with such well-known effects as gravitational refraction and gravitational lensing, which are also a consequence of the action of gravitation on the speed of light. Their belonging to gravitation causes a number of unique features, for example, asymmetry in time dilation and anisotropy of the speed of light, which have been successfully confirmed experimentally. The research is based on a detailed analysis of a large set of experimental data using the classical axiomatic approach.

关键词： General Relativity Extended Theories of Gravity Gravitational Lensing Cosmology Background Radiation

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Natural and Eco-Friendly Materials for Triboelectric Energy Harvesting

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Nano-Micro Letters 2020年第3期12卷 179-196页

作者： vladislav Slabov Svitlana Kopyl Marco PSoares dos Santos Andrei L.Kholkin Department of Physics and CICECO‑Aveiro Institute of Materials University of Aveiro3810‑193 AveiroPortugal Centre for Mechanical Technology and Automation(TEMA) University of Aveiro3810‑193 AveiroPortugal Department of Mechanical Engineering University of Aveiro3810‑193 AveiroPortugal School of Natural Sciences and Mathematics Ural Federal UniversityEkaterinburgRussia 620000 Laboratory of Functional Low‑Dimensional Structures National University of Science and Technology MISiSMoscowRussia 119049

Triboelectric nanogenerators(TENGs)are promising electric energy harvesting devices as they can produce renewable clean energy using mechanical excitations from the *** designs of triboelectric energy harvesters relying on biocompatible and eco-friendly natural materials have been introduced in recent *** ability to provide customizable self-powering for a wide range of applications,including biomedical devices,pressure and chemical sensors,and battery charging appliances,has been *** review summarizes major advances already achieved in the field of triboelectric energy harvesting using biocompatible and eco-friendly natural materials.A rigorous,comparative,and critical analysis of preparation and testing methods is also *** power up to 14 mW was already achieved for the dry leaf/polyvinylidene fluoride-based TENG *** findings highlight the potential of eco-friendly self-powering systems and demonstrate the unique properties of the plants to generate electric energy for multiple applications.

关键词： Natural and eco-friendly materials Energy harvesting Triboelectric nanogenerators Biocompatibility

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Double-AOTF-based aberration-free spectral imaging endoscopic system for biomedical applications

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Journal of Innovative Optical Health Sciences 2015年第3期8卷 72-77页

作者： Alexander Machikhin Vitold Pozhar vladislav Batshev Scientic and Technological Center of Unique Instrumentation RAS Butlerova Street 15Moscow 117342Russia Bauman Moscow State Technical University 2nd Baumanskaya Street 5Moscow 105005Russia

The problem of in vrivo photoluminescence diagnostics of the tissues acessible by endoscopes is *** spectral imaging module attachable to conventional rigid and flexible medical endoscopes is developed and *** is based on a double acousto-optical tunable filter(AOTF)and a specialized optical coupling *** module provides wide field of view(FOV),absence of image distortions,random spectral access,fast spectral image acquisition at any wavelength in the visible range and accurate measurement of reflectance spectrum in each pixel of the *** of typical biomedical samples are presented and *** spectra are compared to the reference data.

关键词： Spectral imaging spectrasoopy double monochromatization acousto-optical tunable fiter photoluminescence diagnostics endoscopy

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The influence of thermodynamic history and external influences on the electrophysical properties of ferropiezoceramic materials based on a multicomponent system PZT-PMN-PZN+SiO_(2)

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Journal of Advanced Dielectrics 2020年第1期10卷 74-79页

作者： Konstantin Andryushin Inna Andryushina Hizir sadykov Alexandr Nagaenko Larisa Reznichenko Research Institute of Physics Southern Federal University Rostov-on-Don 344090Stachki str.194Russia Faculty of Physics and Information-Communication Technologies Chechen State University Grozny364024Sheripova str.32Russia Institute of High Technology and Piezo Technic Southern Federal University Rostov-on-Don 344090Milchakova 10Russia

This paper presents the results of a comprehensive study of the industrially produced ferro-piezoelectric ceramic material based on the PbZrO_(3)-PbTiO_(3)-PbMn_(1/3)Nb_(2/3)O_(3)-PbZn_(1/3)Nb_(2/3)O_(3)+SiO_(2)*** have confirmed that this material refers to ferrorigid materials with high coercive fields,stable dielectric properties in a wide temperature range,practically no Curie temperature hysteresis,as well as low controllability of the dielectric constant and deformation characteristics by constant bias electric *** revealed correlation between dielectric,deformation characteristics and dielectric hysteresis allows us to consider this material as promising for devices operating in power modes:piezotransformers,highly loaded ultrasonic devices,piezoelectric motors,etc.

关键词： Microstructure electric field PZT-PMN-PZN dielectric features deformation

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Selection of overburden surface mining method in West Virginia by analytical hierarchy process

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International Journal of Coal Science & Technology 2014年第3期1卷 306-314页

作者： Timothy A.Nolan vladislav Kecojevic Department of Mining Engineering West Virginia UniversityMorgantownWVUSA

The broad objective of this research was to improve current surface mining practices and reduce negative environmental impact of overburden removal in West Virginia(WV).The specific objectives were to(i)compare conventional surface mining method(drilling,blasting,digging,and loading)to a surface miner(SM)method,and(ii)apply the analytical hierarchy process(AHP)to help select the optimal mining method based on production,cost and environmental *** design and the procedures used in this research involve five interrelated modules:(i)rock properties of overburden in WV,(ii)drilling and blasting,(iii)digging and loading,(iv)SM method,and(v)comparative analysis and selection of the optimal mining method by *** of this research indicate that application of SM method would yield higher cost of overburden removal than conventional mining methods in rocks with a high unconfined compressive strength and abrasivity.A significant advantage of SM method,where applicable,is the elimination of the negative environmental impacts associated with blasting.

关键词： Surface mining West Virginia Overburden Production rate Cost Environmental impact AHP model

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Study of Completed Archaeal Genomes and Proteomes:Hypothesis of Strong Mutational AT Pressure Existed in Their Common Predecessor

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Genomics, Proteomics & Bioinformatics 2010年第1期8卷 22-32页

作者： vladislav V.Khrustalev Eugene V.Barkovsky Department of General Chemistry Belarussian State Medical University

The number of completely sequenced archaeal genomes has been sufficient for a large-scale bioinformatic study. We have conducted analyses for each coding region from 36 archaeal genomes using the original CGS algorithm by calculating the total GC content （G＋C）, GC content in first, second and third codon positions as well as in fourfold and twofold degenerated sites from third codon positions, levels of arginine codon usage （Arg2： AGA/G; Arg4： CGX）, levels of amino acid usage and the entropy of amino acid content distribution. In archaeal genomes with strong GC pressure, arginine is coded preferably by GC-rich Arg4 codons, whereas in most of archaeal genomes with G＋C〈0.6, arginine is coded preferably by AT-rich Arg2 codons. In the genome of Haloquadratum walsbyi, which is closely related to GC-rich archaea, GC content has decreased mostly in third codon positions, while Arg4〉〉Arg2 bias still persists. Proteomes of archaeal species carry characteristic amino acid biases： levels of isoleucine and lysine are elevated, while levels of alanine, histidine, glutamine and cytosine are relatively decreased. Numerous genomic and proteomic biases observed can be explained by the hypothesis of previously existed strong mutational AT pressure in the common predecessor of all archaea.

关键词： G+C 3GC arginine mutational pressure archaea entropy

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Operational method for determining bottom hole pressure in mechanized oil producing wells,based on the application of multivariate regression analysis

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Petroleum Research 2021年第4期6卷 351-360页

作者： Inna N.Ponomareva vladislav I.Galkin Dmitriy A.Martyushev Department of Oil and Gas Technologies Perm National Research Polytechnic UniversityPermRussia614990 Department of Oil and Gas Geology Perm National Research Polytechnic UniversityPermRussia614990

One of the major tasks of monitoring production well operations is to determine bottom-hole flowing *** overwhelming majority of wells in the Perm Krai are serviced using borehole pumps,which makes it difficult to take direct bottom-hole flowing pressure *** bottomhole filtration pressure(BHFP)in these wells is very often determined by recalculating the parameters measured at the well mouth(annulus pressure,dynamic fluid level depth).The recalculation is done by procedures based on analytically determining the characteristics of the gas-liquid mixture in the wellbore,which is very inconsistent to perform due to the mixture's complex *** article proposes an essentially different approach to BHFP measurements that relies on the mathematical processing of the findings of more than 4000 parallel mouth and deep investigations of the oil production wells of a large oil-production *** a result,multivariate mathematical models are elaborated that allow reliably determining the BHFP of oil-production wells in operation.

关键词： Production well Bottom-hole flowing pressure BHFP determination Technique Multivariate statistical model Regression analysis Multilevel modeling

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eXawatt Center for Extreme Light Studies

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High Power Laser Science and Engineering 2023年第6期11卷 101-129页

作者： Efim Khazanov Andrey Shaykin Igor Kostyukov vladislav Ginzburg Ivan Mukhin Ivan Yakovlev Alexander Soloviev Ivan Kuznetsov Sergey Mironov Artem Korzhimanov Denis Bulanov Ilya Shaikin Anton Kochetkov Alexey Kuzmin Mikhail Martyanov Vladimir Lozhkarev Mikhail Starodubtsev Alexander Litvak Alexander Sergeev Gaponov-Grekhov Institute of Applied Physics of the Russian Academy of Sciences Nizhny Novgorod 603950Russia

The eXawatt Center for Extreme Light Studies project aimed to create a large scientific infrastructure based on lasers with giant peak *** project relies on the significant progress achieved in the last *** planned infrastructure will incorporate a unique light source with a pulse power of 600 PW using optical parametric chirped pulse amplification in large-aperture KD_(2)PO_(4),deuterated potassium dihydrogen phosphate *** interaction of such laser radiation with matter represents a completely new fundamental *** direct study of the space-time structure of vacuums and other unknown phenomena at the frontier of high-energy physics and the physics of superstrong fields will be *** applications will include the development of compact particle accelerators,the generation of ultrashort pulses of hard X-ray and gamma radiation for material science enabling one to probe material samples with unprecedented spatial and temporal resolution,the development of new radiation and particle sources,*** paper is translation from Russian[Kvantovaya Elektronika 53,95(2023)].

关键词： high-power femtosecond lasers interaction of ultrarelativistic field with matter

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