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Digital Earth surface maps for radar ground clutter simulation

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Journal of Systems Engineering and Electronics 2022年第2期33卷 340-344页

作者： ORESHKINA margarita STEPANOV Maksim KISELEV Alexey Novosibirsk State Technical University Novosibirsk 630073Russia

This paper dwells upon optimizing the azimuth samp-ling interval of digital surface maps used to model radar ground *** resulting equations can be used to find the digital map sampling interval for the required calculation error and modeled power of the simulated signal,which determines the resulting distribution of backscatter *** paper further showcases how the sampling interval could be increased by pre-processing the map.

关键词： ground clutter mathematical modelling radar simulation

Age and chemical composition of the globular cluster NGC 6652

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Research in Astronomy and Astrophysics 2020年第8期20卷 252-260页

作者： margarita Eugene Sharina Vladislav Vladimirovich Shimansky Special Astrophysical Observatory Russian Academy of SciencesNizhnii Arkhyz369 l67Russia Kazan Federal University 18 Kremlyovskaya streetKazan420008Russia

We present the results of determination of the age,helium mass fraction(Y),metallicity([Fe/H]),and abundances of the elements C,N,O,Na,Mg,Ca,Ti,C and Mn for the Galactic globular cluster NGC *** use its medium-resolution integrated-light spectrum from the library of Schiavon and our population synthesis method to fulfill this *** select the evolutionary isochrone and stellar mass function for our analysis,which provide the best approximation to the shapes and intensities of the observed Balmer line *** determined elemental abundances,age and metallicity are characteristic of stellar populations in the Galactic Bulge.

关键词： globular clusters:general globular clusters:abundances globular clusters:individual:NGC 6652

Excitotoxicity-induced endocytosis as a potential target for stroke neuroprotection

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Neural Regeneration Research 2021年第2期16卷 300-301页

作者： margarita Díaz-Guerra Instituto de Investigaciones Biomédicas“Alberto Sols” Consejo Superior de Investigaciones Científicas-Universidad Autónoma de Madrid(CSIC-UAM)MadridSpain

Decreased neuronal survival-signaling and brain damage:Stroke is a leading cause of death worldwide,the major cause of adult disability and second of *** spite of the social and economic importance of this disorder,an... 详细信息

关键词： drugs death damage

Comparison of extraction abilities of deep eutectic solvents and aqueous acid solutions for extraction of rare earths and transition metals

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Journal of Rare Earths 2024年第6期42卷 1157-1164,I0006页

作者： Svetlana Drogobuzhskaya margarita Frolova Andrey Shishov Nikita Tsvetov Tananaev Institute of Chemistry-Subdivision of the Federal Research Centre《Kola Science Centre of the Russian Academy of Sciences》 18420926a AcademgorodokApatityRussia Murmansk State Technical University 183010Sportivnaja str.13MurmanskRussia Department of Analytical Chemistry Institute of ChemistrySaint Petersburg State UniversitySpbSU.1990347/9 Universitetskaya embSt.Petersburg Russia

In recent years,deep eutectic solvents have attracted increasing interest as effective extractants for the separation of both organic substances and metals from various ***-based deep eutectic solvents are most often used as extractants for the extraction of *** this work,for the first time,the extraction efficiency of transition metals and rare earth elements(Y,Zr,Nb,La,Ce,Pr,Nd,Sm,Eu,Gd,Tb,Dy,Ho,Er,Tm,Yb,Lu,Hf and Ta)from mining tailings and Na,K,Ca,Mg,Cu,Fe,Mn,Pb,Ba,Ni and Sr from biodiesel samples using acidic deep eutectic solvents and saturated aqueous solutions of the same acids(malonic,malic,tartaric and citric)is *** this,deep eutectic solvents based on acids and their aqueous saturated solutions were prepared and *** prepared mixtures were analyzed by IR spectroscopy to confirm the formation of eutectic *** such as the density and viscosity of the resulting mixtures were also investigated,as this can be of key importance for the efficiency of metal *** extraction of rare earth metals from mining tailings took a long time(up to several days),while the extraction of metals from fuel took no more than 30 *** emission spectral methods were used as an analysis *** is shown that the extraction efficiency with aqueous solutions is better than that with eutectic solvents,which casts doubt on the need for deep eutectic solvents use in this area.

关键词： Deepeutectic solvent Metal separation Elemental analysis Rare earth metals Biodiesel

Peliosis hepatis complicated by portal hypertension following renal transplantation

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World Journal of Gastroenterology 2020年第34期26卷 5220-5222页

作者： Grigory Demyashkin margarita Zatsepina Department of Pathology Sechenov UniversityMoscow 119146Russia

Peliosis hepatis is a rare benign disease,but in last years the number of identified cases has *** disease is known to be sometimes accompanied by hepatocellular *** the recent article,Yu et al describe a case of liver peliosis,characterized by an increased proliferative ***,additional diagnosis of patients should include analyzing other tumor markers expression in order to assess the risk of malignant cell transformation in peliosis hepatis.

关键词： Peliosis hepatis Hepatocellular carcinoma Survivin Epithelial-mesenchymal transition

Geo-Scape,a Granularity Depended Spatialization Tool for Visualizing Multidimensional Data Sets

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Geo-Spatial Information Science 2010年第4期13卷 275-284页

作者： Kontaxaki Sofia Kokla margarita Kavouras Marinos School of Rural and Surveying Engineering National Technical University of Athens9 H.Polytechniou Str.Zografos Campus15780 AthensGreece

Recently,the expertise accumulated in the field of geovisualization has found application in the visualization of abstract multidimensional data,on the basis of methods called spatialization *** methods aim at visualizing multidimensional data into low-dimensional representational spaces by making use of spatial metaphors and applying dimension reduction *** metaphors are able to provide a metaphoric framework for the visualization of information at different levels of *** present paper makes an investigation on how the issue of granularity is handled in the context of representative examples of spatialization ***,this paper introduces the prototyping tool Geo-Scape,which provides an interactive spatialization environment for representing and exploring multidimensional data at different levels of granularity,by making use of a kernel density estimation technique and on the landscape "smoothness" metaphor.A demonstration scenario is presented next to show how Geo-Scape helps to discover knowledge into a large set of data,by grouping them into meaningful clusters on the basis of a similarity measure and organizing them at different levels of granularity.

关键词： multidimensional data spatial metaphors spatialization graphical interface kernel density estimation

Ecological aspect in the systematics of fungi

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菌物学报 2011年第6期30卷 846-852页

作者： margarita BONDARTSEVA VL Komarov Botanical Institute of Russian Academy of Sciences Saint Petersburg 197376Russia

The main morphological features of fungi representing different evolutionary lines are *** situations which stimulate morphological changes are *** is suggested to define ecological significance of fungal morphological characters,dividing them to the ecologically inert(the main characters determining evolutionary line) and ecologically active-characters which submerged to the changes with the changing of environmental *** main strategies for fungi in nature are described:raising competitive ability to win conquer for substratum,for the place in ecosystem,and the second way for less competitive species-to adapt to more stressful natural conditions and to occupy ecological niches becoming *** examples of analysis of adaptation to substrata and climatic zones by fungi are shown.

关键词：摘要编辑部编辑工作作者

Evaluation of the efficiency of urban solid waste management in Brazil by data envelopment analysis and possible variables of influence

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Waste Disposal and Sustainable Energy 2024年第2期6卷 283-295页

作者： Isabel das Merces Costa Marta Ferreira Dias margarita Robaina GOvCOPP-Research Unit on Governance Competitiveness and Public Policies and Analyst of UniversidadeEstadual de Feira de SantanaUniversidade de AveiroAveiroPortugal GOvCOPP-Research Unit on Governance Competitiveness and Public PoliciesDEGEIT-Department of EconomicsManagementIndustrial Engineering and TourismUniversidade de AveiroAveiroPortugal

This article has the general objective of estimating the efficiency of urban solid waste management in 940 Brazilian munici-palities through Data Envelopment Analysis(DEA)technique and has specific objectives:(i)to estimate efficiency scores;(ii)to compare the performance between different groups of municipalities;and(ii)to analyze the profile of efficient munici-palities from the perspective of the guidelines of Law 12,305/2010 and socio-economic and environmental *** technique used was DEA with output-oriented and variable scale to return *** results showed higher efficiency scores in the municipalities with populations above 500,000 *** score variation ranged from 0.5(municipalities with populations<10,000 inhabitants)to 0.9(municipalities with more than 500,000 inhabitants).Of the sample set,only 12.34%of the municipalities were considered efficient,and when analyzing the efficient group,it was found that adherence to legislation was not a major factor in achieving efficiency.

关键词： Urban solid waste management Data envelopment analysis Efficiency Brazil Municipalities

Identification of sumoylated targets in proliferating mouse spermatogonia and human testicular seminomas

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Asian Journal of Andrology 2020年第6期22卷 569-577页

作者： margarita Vigodner Benjamin Lucas Stav Kemeny Tamar Schwartz Rebecca Levy Department of Biology Stern CollegeYeshiva UniversityNew YorkNY 10016USA Department of Developmental and Molecular Biology Albert Einstein College of MedicineBronxNY 10461USA

Spermatogenesis is regulated by a complex network of posttranslation ***(a modification by small ubiquiti like modifiers,or SUMO proteins)was identified as an importa nt cellular event in d iff ere nt cell *** proteins are highly expressed in the testis,and their role during spermatogenesis has begun to be *** the important role of sumoylation in the regulation of mitosis and cancer progress!on in other tissues,the aim of the current study was to identify the targets of SUMO in proliferating mouse spermatog onia and huma n semi noma tissues and to in itially exami ne the level of sumoylation in relation to the proliferative activity of the *** freshly purified spermatogonia and Cl8-4 spermatogonia cell line,mass spectrometry analysis identified several SUMO targets implicated into the proliferation of spermatogonia(such as heat shock protein 60[HSP60]and prohibitin).Tissue array and western blot approaches showed that SUMO expression is a prominent feature of human seminomas and that the proliferative activity of the tumor tissues was positively correlated with the level of SUMO *** regulation of sumoylati on with si-RNA was not sufficie nt to sign ificantly affect the proliferation of C18-4 spermatogonia;however,SUMO overexpression in creased the proliferation rate of the *** data suggest that cells are more sensitive to an elevated level of SUMO,and that this situation may lead to an upregulated cellular proliferation and,possibly,*** spectrometry analysis identified around a hundred SUMO targets in seminoma ***,many of the identified proteins(such as proliferating cell nuclear antigen[PCNA],DNA topoisomerase 2-alpha[Top2A],prohibitin,14-3-3 protein,and others)were implicated in oncogenic transformation and cancer progression.

关键词： proliferation seminoma spermatog onia sumoylation