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G-Algebra Structure on the Higher Order Hochschild Cohomology H*_(S)^(2)(A,A)

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Algebra Colloquium 2022年第1期29卷 113-124页

作者： Samuel Carolus mihai D.Staic Department of Mathematics and Statistics Ohio Northern University AdaOH 45810USA Department of Mathematics and Statistics Bowling Green State University Bowling GreenOH 43403USA Institute of Mathematics of the Romanian Academy PO.BOX 1-764 RO-70700 BucharestRomania

We present a deformation theory associated to the higher Hochschild coho-mology H*_(S)^(2)(A,A).We also study a G-algebra structure associated to this deformation theory.

关键词： higher Hochschild cohomology operad G-algebra

Two-parameter families of uniquely extendable Diophantine triples

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Science China Mathematics 2018年第3期61卷 421-438页

作者： mihai Cipu Yasutsugu Fujita Maurice Mignotte Simion Stoilow Institute of Mathematics of the Romanian Academy Research unit nr. 5 P.O. Box 1-764 RO-014700 Bucharest Romania Department of Mathematics College of Industrial Technology Nihon University 2-11-1 Shin-ei Narashino Chiba 276-0028 Japan Département de Mathematique Universite de Strasbourg Strasbourg 67084 France

Let A and K be positive integers and ε∈ {-2,-1,1,2}. The main contribution of the paper is a proof that each of the D(ε~2)-triples {K, A^2 K+2εA,(A +1)~2 K + 2ε(A+1)} has uniqui extension to a D(ε~2)-quadruple. This is used to slightly strengthen the conditions required for the existencc of a D(1)-quintuple whose smallest three elements form a regular triple.

关键词： Diophantine m-tuples Pell equations hypergeometric method linear forms in logarithms

Intraocular pressure modifications in patients with acute central/hemicentral retinal vein occlusions

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International Journal of Ophthalmology(English edition) 2021年第6期14卷 931-935页

作者： Dan Calugaru mihai Calugaru Department of Ophthalmology University of MedicineCluj-Napoca 400467Romania

Intraocular pressure(IOP)modifications in patients with acute central/hemicentral retinal vein occlusions(RVOs)consist in IOP reductions and *** IOP reduction is due to a transitional hyposecretory phase of the aqueous humor,that increases gradually until 3 mo after the venous occlusion onset,and then finally disappears after month 4 *** IOP increases lead to the ocular hypertension and *** possible pathogenetic correlations between ocular hypertension/glaucoma and acute central/hemicentral RVOs have been classified into three groups:1)the venous occlusion precedes the ocular hypertension/glaucoma causing neovascular glaucoma and secondary angle-closure glaucoma without rubeosis;2)the ocular hypertension and the glaucoma precede the venous occlusion and favor its appearance(ocular hypertension,primary angle-closure,primary angle-closure glaucoma,and open angle glaucomas);and 3)the venous occlusion and the ocular hypertension/glaucoma are mostly age dependent appearances due to common vascular and collagen alterations,lacking a causal connection between the 2 conditions.

关键词： intraocular pressure acute central/hemicentral retinal vein occlusion neovascular glaucoma ocular hypertension primary angle-closure open angle glaucoma secondary nonrubeotic angle-closure glaucoma

Expansion of the hepatocellular carcinoma Milan criteria in liver transplantation: Future directions

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World Journal of Gastroenterology 2018年第32期24卷 3626-3636页

作者： mihai-Calin Pavel Josep Fuster Hepato Bilio Pancreatic Surgery and Transplant Unit Department of Surgery Digestive and Metabolic Diseases Institute Hospital Clínic University of Barcelona Barcelona-Clínic Liver Cancer Group (BCLC) Liver Unit Institut d’Investigacions Biomèdiques August Pii Sunyer (IDIBAPS) CIBEREHD Universitat de Barcelona

Milan criteria are currently the benchmark related to liver transplantation(LT) for hepatocellular carcinoma. However, several groups have proposed different expanded criteria with acceptable results. In this article, we review the current status of LT beyond the Milan criteria in three different scenarios-expanded criteria with cadaveric LT, downstaging to Milan criteria before LT, and expansion in the context of adult living donor LT. The review focuses on three main questions: what would the impact of the expansion beyond Milan criteria be on the patients on the waiting list; whether the dichotomous criteria(yes/no) currently used are appropriate for LT or continuous survival estimations, such as the one of "Metroticket" and whether it should enter into the clinical practice; and, whether the use of living donor LT in the context of expansion beyond Milan criteria is justified.

关键词： Hepatocellular carcinoma Milan criteria Liver transplantation Living donor liver transplantation Expanded criteria Downstaging

High perioperative lactate levels and decreased lactate clearance are associated with increased incidence of posthepatectomy liver failure

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Hepatobiliary & Pancreatic Diseases International 2021年第6期20卷 592-594页

作者： mihai Popescu Simona Dima Vladislav Brasoveanu Andrada Tudor mihai Simionescu Dana Tomescu “Carol Davila”University of Medicine and Pharmacy Bucharest 020021Romania Department of Anesthesia and Intensive Care Fundeni Clinical InstituteBucharest 022328Romania “Dan Setlacec”Center for General Surgery and Liver Transplantation Fundeni Clinical InstituteBucharest 022328Romania

To the Editor:Extensive liver resection represents a life-saving intervention in patients with primary or secondary liver *** advances made in the field of chemotherapy and surgical techniques have translated into a greater number of patients who are older and with more complex comorbidities presenting for major liver surgery[1]and thus having an increased risk of perioperative mortality.

关键词： chemotherapy liver mortality

Geographic information system (GIS) application for windthrow mapping and management in Iezer Mountains, Southern Carpathians

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Journal of Forestry Research 2012年第2期23卷 175-184页

作者： Savulescu Ionut mihai Bogdan Department of Geomorphology-Pedology and Geomatics Faculty of GeographyUniversity of Bucharest1Nicolae Balcescu Blvd.010041 BucharestSector 1Romania

Windthrow problem is a difficult task for the forest managers in the Romanian Carpathians and especially in Iezer Mountains. The last windthrow, in July 2005, affected about 370 ha within the study area and left unprotected large slopes with important declivities （20-30°）. In our study, we try to propose a tool for forest management, in order to control and minimize the negative effect of wind upon the mountain forest ecosystem. The digital data input derived from forestry data （forest stand typology, age, canopy coverage index, forest productivity class） and from the forest biotope features （soil and topography parameters）. The main goal was to find a more objective way for digital layer reclassification in order to obtain the windthrow areas susceptibility map for the Iezer Mountains. Each digital layer has its own weight within the analysis and one of them was difficult to be modeled （the wind features）. A statistical approach was developed on the basis of local phenomena and the wind- throw features in the Romanian Carpathians. This allowed us to obtain the reclassification conditions for each digital layer. Forest canopy typology and soil features （mainly its volume） were considered as the key factors for the windthrow occurrence analysis. The final windthrow susceptibility map was validated with the help of the statistic occurrence of windthrow areas within each susceptibility class and after a field check of the sites. The result was encouraging, because 92.5% of the windthrow areas fall into the highest windthrow susceptibility class.

关键词： windthrow GIS forest map susceptibility

Dynamic event-triggered fault-tolerant cooperative resilient tracking control with prescribed performance for UAVs

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Science China(Information Sciences) 2024年第8期67卷 67-84页

作者： Rong YUAN Zhengcai AN Shuyi SHAO Mou CHEN mihai LUNGU College of Automation Engineering Nanjing University of Aeronautics and Astronautics Science and Technology on Electro-optic Control Laboratory Faculty of Electrical Engineering University of Craiova Aerospace Engineering Doctoral School University Politehnica of Bucharest

In this paper, a resilient tracking control scheme with cooperative collision avoidance performance is studied for the fixed-wing unmanned aerial vehicle(UAV) leader-follower formation in the presence of actuator failures and external disturbances. Firstly, based on the control objectives of UAV formation tracking and collision avoidance, the transformation tracking errors are obtained using the prescribed performance control technique. Next, a fault detection mechanism is introduced to determine if there is the actuator fault. Subsequently, the event-triggered resilient fault observers are designed based on a dynamic eventtriggered mechanism to estimate actuator faults. Furthermore, the prescribed performance functions and the H∞ performance index are employed to ensure the UAV formation collision-free and mitigate the impact of disturbances. Moreover, the resilient controller is designed to minimize the effect of the perturbations for the control gain and the fault observer gain on the system. The stability of the system is also proven through the Lyapunov stability analysis, and the controller gains are calculated by solving the linear matrix ***, the validity of the proposed control strategy is demonstrated by the simulation analysis.

关键词： UAV formation cooperative collision avoidance event-triggered fault observer prescribed performance resilient control

Emerging roles of lactic acid bacteria in protection against colorectal cancer

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World Journal of Gastroenterology 2014年第24期20卷 7878-7886页

作者： Li Zhong Xufei Zhang mihai Covasa Department of Basic Medical Sciences College of Osteopathic Medicine of the PacificWestern University of Health SciencesPomonaCA 91766United States Department of Cell Biology College of Life SciencesHebei University Institut National de la Recherche Agronomique (INRA) UMR1319 MicalisDomaine de Vilvert78352 Jouy-enJosasFrance Department of Human and Health Development University of SuceavaSuceava 720229Romania

Colorectal cancer(CRC)is the third leading cause of cancer deaths worldwide and the fourth most common cancer diagnosed among men and women in the United *** the risk factors of CRC,dietary therapy has become one of the most effective approaches in reducing CRC morbidity and *** use of probiotics is increasing in popularity for both the prevention and treatment of a variety of *** the most common types of microbes used as probiotics,lactic acid bacteria(LAB)are comprised of an ecologically diverse group of microorganisms united by formation of lactic acid as the primary metabolite of sugar *** have been successfully used in managing diarrhea,food allergies,and inflammatory bowel *** also demonstrated a host of properties in preventing colorectal cancer development by inhibiting initiation or progression through multiple *** this review,we discuss recent insights into cellular and molecular mechanisms of LAB in CRC prevention including apoptosis,antioxidant DNA damages,immune responses,and *** emerging experimental findings from clinical trials as well as the proposed mechanisms of gut microbiota in carcinogenesis will also be briefly discussed.

关键词： Gut bacteria Gastrointestinal Carcinogenesis Probiotics Microbiota

Performance of heavy ductile iron castings for windmills

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China Foundry 2010年第2期7卷 163-170页

作者： Iulian Riposan mihai Chisamera Stelian Stan POLITEHNICA University of Bucharest 313 Spl.Independentei RO-060042 BucharestRomania

The main objective of the present paper is to review the specific characteristics and performance obtaining conditions of heavy ductile iron(DI) castings,typically applied in windmills industry,such as hubs and rotor *** requirements for high impact properties in DI at low temperatures are part of the ENGJS-400-18U-LT(SRN 1563) commonly referred to as GGG 40.3(DIN 1693).Pearlitic in-uence factor(Px) and antinodularising action factor(K1) were found to have an important in-uence on the structure and mechanical properties,as did Mn and P content,rare earth(RE) addition and inoculation *** presence of high purity pig iron in the charge is extremely beneficial,not only to control the complex factors Px and K1,but also to improve the 'metallurgical quality' of the iron melt.A correlation of C and Si limits with section modulus is very important to limit graphite nodule *** and surface-degenerated graphite are the most controlled graphite morphologies in windmills *** paper concluded on the optimum iron chemistry and melting procedure,Mg-alloys and inoculants peculiar systems,as well as on the practical solutions to limit graphite degeneration and to ensure castings of the highest integrity,typically for this field.

关键词： heavy ductile iron castings windmills parts chemistry structure treatments control