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Nanotechnology and Precision Engineering 2022年第4期5卷 26-45页

作者： victor K.Pustovalov Belarussian National Technical University Pr.Independency65Minsk 220013Belarus

This review considers the fundamental dynamical processes of metal nanoparticles during and after the impact of a femtosecond laser pulse on a nanoparticle,including the absorption of *** the sequence of events after photon absorption and their timescales is important for many applications of *** processes are discussed,starting with optical absorption by electrons,proceeding through the relaxation of the electrons due to electron–electron scattering and electron–phonon coupling,and ending with the dissipation of the nanoparticle energy into the *** goal is to consider the timescales,values,and temperature dependences of the electron heat capacity and the electron–phonon coupling parameter that describe these processes and how these dependences affect the electron energy ***-and four-temperature models for describing electron–phonon relaxation are *** emphasis is paid to the proposed analytical approach to modeling processes during the action of a femtosecond laser pulse on a metal *** consider the temperature dependences of the electron heat capacity and the electron–phonon coupling factor of the *** entire process is divided into four stages:(1)the heating of the electron system by a pulse,(2)electron thermalization,(3)electron–phonon energy exchange and the equalization of the temperature of the electrons with the lattice,and(4)cooling of the *** is an appropriate analytical description of each *** four-temperature model can estimate the parameters of the laser and nanoparticles needed for applications of femtosecond laser pulses and nanoparticles.

关键词： Femtosecond pulse Nanoparticle Metallic Model Thermal processes Analytical solution

ESTIMATION AND UNCERTAINTY QUANTIFICATION FOR PIECEWISE SMOOTH SIGNAL RECOVERY

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Journal of Computational Mathematics 2023年第2期41卷 246-262页

作者： victor Churchill Anne Gelb Department of Mathematics The Ohio State UniversityColumbusOHUSA Department of Mathematics Dartmouth CollegeHanoverNHUSA

This paper presents an application of the sparse Bayesian learning(SBL)algorithm to linear inverse problems with a high order total variation(HOTV)sparsity *** the problem of sparse signal recovery,SBL often produces more accurate estimates than maximum a posteriori estimates,including those that useℓ1 ***,rather than a single signal estimate,SBL yields a full posterior density estimate which can be used for uncertainty ***,SBL is only immediately applicable to problems having a direct sparsity prior,or to those that can be formed via *** paper demonstrates how a problem with an HOTV sparsity prior can be formulated via synthesis,and then utilizes *** expands the class of problems available to Bayesian learning to include,e.g.,inverse problems dealing with the recovery of piecewise smooth functions or signals from *** examples are provided to demonstrate how this new technique is effectively employed.

关键词： High order total variation regularization Sparse Bayesian learning Analysis and synthesis Piecewise smooth function recovery

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Temporal aiming

Light(Science & Applications) 2020年第1期9卷 741-752页

作者： victor Pacheco-Pena Nader Engheta School of Mathematics Statistics and PhysicsNewcastle UniversityNewcastle Upon Tyne NE17RUUK Department of Electrical and Systems Engineering University of PennsylvaniaPhiladelphiaPA 19104USA

Deflecting and changing the direction of propagation of electromagnetic waves are needed in multiple applications,such as in lens-antenna systems,point-to-point communications and *** this realm,metamaterials have been demonstrated to be great candidates for controlling wave propagation and wave-matter interactions by offering manipulation of their electromagnetic properties at *** have been studied mainly in the frequency domain,but their temporal manipulation has become a topic of great interest during the past few years in the design of spatiotemporally modulated artificial *** this work,we propose an idea for changing the direction of the energy propagation of electromagnetic waves by using time-dependent metamaterials,the permittivity of which is rapidly changed from isotropic to anisotropic values,an approach that we call temporal *** so doing,here,we show how the direction of the Poynting vector becomes different from that of the *** scenarios are analytically and numerically evaluated,such as plane waves under oblique incidence and Gaussian beams,demonstrating how proper engineering of the isotropic-anisotropic temporal function of ε_(r)(t)can lead to a redirection of waves to different spatial locations in real time.

关键词： anisotropic wave oblique

Opportunities and challenges in CO_(2) utilization

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Journal of Environmental Sciences 2022年第3期34卷 322-344页

作者： Sriram Valluri victor Claremboux Surendra Kawatra Department of Chemical Engineering Michigan Technological UniversityHoughtonMI 49931USA

CO_(2) utilizations are essential to curbing the greenhouse gas effect and managing the environmental pollutant in an energy-efficient and economically-sound *** paper seeks to critically analyze these technologies in the context of each other and highlight the most important utilization avenues available thus *** review will introduce and analyze each major pathway,and discuss the overall applicability,potential extent,and major limitations of each of these pathways to utilizing CO_(2).This will include the analysis of some previously underreported utilization avenues,including CO_(2) utilization in industrial filtration and the processing of raw industrial materials such as iron and *** core theme of this paper is to seek to treat CO_(2) as a commodity instead of a liability.

关键词： CO_(2)utilization Clean energy Supercritical CO_(2) Electrochemical reduction

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共产国际柏林西欧书记处活动研究

当代世界社会主义问题 2024年第2期 42-52,165页

作者：曹漩 [德]维克多·杰宁豪斯北京师范大学历史学院北京100875 国汉堡大学东北欧德意志历史与文化研究所德国吕讷堡21335

俄国十月革命后,俄共(布)将德国作为欧洲革命的桥头堡,在柏林设立西欧书记处,由共产国际著名活动家雅科夫·赖希领导。书记处肩负为欧洲乃至世界革命提供现实保障的使命,在德国进行了一系列机密性活动,包括在西欧建立共产国际网络,向欧... 详细信息

俄国十月革命后,俄共(布)将德国作为欧洲革命的桥头堡,在柏林设立西欧书记处,由共产国际著名活动家雅科夫·赖希领导。书记处肩负为欧洲乃至世界革命提供现实保障的使命,在德国进行了一系列机密性活动,包括在西欧建立共产国际网络,向欧洲左翼政党提供宣传材料和政治咨询等。其中,书记处最重要的作用是用苏俄外汇资助西方的共产党和左翼人士,充当共产国际在德国乃至整个西欧的地下经费中转站的角色。这些活动是共产国际初期实践的重要组成部分,为苏俄打破外国封锁和传播共产主义理论提供了巨大帮助。但值得注意的是,书记处在组织管理方面较为松散灵活,体现出共产国际过渡时期的特点。这主要是由欧洲局势以及共产国际的策略所决定的,并不能完全归咎到经验不足上来。书记处直接推动了共产国际对自身组织及工作方式进行变革,体现出苏联以及共产国际身份的转变:如果在20世纪初,世界革命的成败被认为是保卫新生政权的先决条件,那么到了20世纪20年代中后期,情况则有所变化,苏联成了未来世界革命的保障。

关键词：柏林西欧书记处雅科夫·赖希共产国际世界革命

Post Episiotomy Morbidity among Parturient in Alex Ekwueme Federal University Teaching Hospital Abakaliki, Ebonyi State

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Open Journal of Obstetrics and Gynecology 2024年第8期14卷 1144-1160页

作者： John Chinedu Obasi Ayodele Adegbite Olaleye Boniface N. Ejikeme John O. Egede Charles Nwambeke Edene Enemma Christian Enemma victor Onuchukwu Emmanuel Onyekelu Nathan C. Ekpe Wendy Oliobi Emmanuel C. Uwakwe Department of Obstetrics and Gynaecology Alex Ekwueme Federal University Teaching Hospital AbakalikiNigeria

Background: Episiotomy is a very common obstetric surgery, and it could be associated with serious complications. However, these complications largely are not noticed due to the shift of attention from mother to baby, after a successful delivery. Objective: To identify the morbidities associated with episiotomies and factors associated with such morbidities. Method: This was a questionnaire based cross sectional descriptive study among women who attended the Obstetric Department of Alex Ekwueme Federal University Teaching Hospital Abakaliki Ebonyi State, between 1st July and 31st Nov, 2023. The study population consisted of parturients who had episiotomies in their previous confinements, attending either the antenatal clinic or the postnatal clinic at Alex Ekwueme Federal University Teaching Hospital Abakaliki Ebonyi State. Results: Macrosomia was the most common indication of episiotomy at a rate of 31.6%. The majority of episiotomies were performed on the parturients in their first confinement at a rate of 64.5% and the majority of repairs were performed by the Registrar at a rate of 65.0%. Informed consent was obtained from 45.79% of parturients while 54.21% were not informed before the episiotomy was administered. Only 55.3% of the parturient received analgesia before episiotomy was administered. The majority of the parturients had their episiotomy repaired between 10 - 15 minutes at a rate of 40.3%. Postoperative pain at the rate of 44.5% was the most common complication and dyspareunia as a form of sexual complication was the commonest at a rate of 31.3%. Conclusion: The parturient needs to be properly counselled before administration of episiotomy and adequate analgesia should be given, as episiotomy is a surgical procedure. Proper training of health workers on both the technique of administering and repairing episiotomy is important. Restrictive use of routine episiotomy in primigravidae is advised to reduce the rate of episiotomy.

关键词： Episiotomy Vulva Pains Primigravidae Morbidities Analgesia

Molecular Docking of 4-Tert-buthyl-bis-(2,6-thiomorpholin-4-ylmethyl)-1-phenol (LQM319) on Fas Receptor (CD95)

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Journal of Cancer Therapy 2013年第1期4卷 176-181页

作者： Oscar Zuniga victor HVazquez Ana Maria Velazquez victor HAbrego Sandra diaz-Barriga Arceo Patricia Ramirez Roberto diaz Enrique Angeles Laboratorio de Toxicologia y Genetica Departamento de C.BiologicasFacultad de Estudios Superiores CuautitlanUniversidad Nacional Autonoma de MexicoCuautitlan IzcalliMexico Laboratorio de Quimica Medicinal Departamento de Ciencias Quimicas Facultad de Estudios Superiores Cuautitlan Universidad Nacional Autonoma de MexicoCuautitlan IzcalliMrxico.

The balance between cell proliferation and cell growth characterizes tissue homeostasis on one side and cell death on the other side. Fas receptor-mediated apoptosis is a control mechanism for tissue homeostasis, and avoiding this death pathway predisposes to many human diseases, including cancer. Current therapies for this disease are invasive and do not have the desired effect in the control of the disease. In this context, the search for new drugs that contribute to a better treatment is gaining more relevance. 4-tert-butyl-bis-(2,6-thiomorpholin-4-ylmethyl)-1-phenol (LQM319) [1,2] is a drug currently in preclinical stage, and we have shown that it has a hypertensive effect, similar to captopril, in a hypertensive rat model. Different studies have shown that some chemicals that are used as antihypertensive agents have an antineoplastic effect against certain types of cancer, as is the case of hydralazine [3], and captopril [4], among others [5]. On the other hand, it has been reported that morpholine derivatives may activate Fas (CD95)-mediated apoptosis. The aim of the present study was to show the interaction between CD95 (receptor) and thiomorpholine derivatives (ligand) using molecular modeling and docking studies, and to elucidate the possible action mechanism of 4-tert-butyl-bis-(2,6-thiomorpholin-4-ylmethyl)-1-phenol.

关键词： Fas Receptor (CD95) Fas Ligand (FasL) Docking

FORGING ASIA′S GLOBAL TRANSPARK IN THE PEARL RIVER DELTA AT ZHUHAI

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Chinese Geographical Science 2003年第4期13卷 300-309页

作者： victor F S SIT .

The main purpose of the paper is to introduce the concept of the Global TransPark (GTP). It is a critical time to develop air logistics infrastructure in the New Economy. The paper also presents a brief review of the air cargo industry in the Asian-Pacific region and China,in particular China’s development in the industry as its economy has grown rapidly and globalized in the past two decades. The paper argues that China needs to develop a GTP to support its future growth,and explains why the Pearl River Delta-Hong Kong-Macao city-region or Extended Metropolitan Region (EMR) is the best location. Finally,it proposes that Zhuhai Airport,one of the five airports in the EMR,is the best site for the GTP. New policies from Chinese government as well as close cooperation between local governments of Guangdong and the two Special Administrative Regions of Hong Kong and Macao will be needed to make the establishment of the GTP possible.

关键词： Global TransPark airport air cargo transport Hong Kong Extended Metropolitan Region the Pearl River Delta New Economy

Ammoniteand bivalve-based biostratigraphy and Panboreal correlation of the Volgian Stage

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Science China Earth Sciences 2009年第12期52卷 1890-1909页

作者： ROGOV Mikhail ZAKHAROV victor Geological Institute of RAS Pyzhevski lane 7 Moscow 119017 Russia

The current ammonite- and buchiid-based biostratigraphical successions of the Volgian Stage are outlined, with an analysis of the most important data that support correlation throughout the Panboreal Superrealm. Updated ammonite zonal schemes were proposed for the Volgian of the type region (the Russian Platform) and Svalbard. The lower Volgian successions in all areas except the Russian Platform, with its eudemic virgatitid lineage and Submediterranean faunal elements, were dominated by Pectinatites and Eosphinctoceras-Subdichotomoceras. The last two genera were especially common eastwards from the Ural Mountains. During the middle Volgian, provincialism developed quickly within the ammonites, and unified assemblages with early Palvovia and Dorsoplanites at the base of the substage were replaced by numerous local eudemic faunas. Despite this, migrations of species of Crendonites, Laugeites, Epivirgatites Epipallasiceras, Epilaugeites, and Taimyrosphinctes occurred at regular intervals and these enable precise correlations between the faunal sub-provinces. The zonation of the upper Volgian is mainly based upon the succession of Craspedites (on Subcraspedites in England and North Sea), and can be traced throughout the Arctic. Zonation based on the bivalve Buchia enables correlations to be made between the successions over much of the Northern Hemisphere, including Northern California, British Columbia, Arctic areas, and the Russian Platform. Each substage of the Volgian is characterized by buchiids with different types of the ontogenetic development. Research on the infrazonal subdivision of the Volgian Stage based on buchiids is currently in progress. Our analyses of the ammonite and buchiid successions of the Panboreal Superrealm lead us to conclude that there are no major faunal gaps in Volgian successions of the Russian Platform and Northern Siberia.

关键词： Volgian Portlandian Panboreal Superrealm ammonites buchiids correlation.

The Oceanus Borealis of ancient Mars

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National Science Review 2023年第9期10卷 234-235页

作者： victor R.Baker Departments of Hydrology and Atmospheric Sciences Planetary Sciences and Geosciences University of Arizona

Fifty years ago,the Mariner 9 spacecraft revealed that the Martian surface has a great planetary dichotomy separating heavily cratered southern highlands from a huge area of more lightly cratered northern *** this discovery,informal hypothesizing by geologists considered the possibility of an Earth-like water body occupying the northern lowland Martian plains.

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