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Snapshot imaging of ultrashort electron bunches

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Light(Science & Applications) 2024年第7期13卷 1226-1228页

作者： Andreas Döpp Ludwig-Maximilian-Universität München Am Coulombwall 185748GarchingGermany Max Planck Institut für Quantenoptik Hans-Kopfermann-Strasse 1Garching85748Germany

New measurements combine spatial and temporal information from optical transition radiation to estimate the three-dimensional structure of electron bunches from a laser wakefield accelerator.

关键词： ultrashort Snapshot electron

Plasma optics improving plasma accelerators

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Light(Science & Applications) 2022年第9期11卷 1954-1955页

作者： Andreas Dopp Ludwig-Maximilians-Universit?t Munchen GarchingGermany

Plasma accelerators driven by high-power lasers can provide high-energy electron beams on a dramatically smaller scale than conventional radio-frequency ***,the performance of these accelerators is fundamentally limited by the diffraction of the ***-generated plasma waveguides can mitigate this problem and,combined with a controlled injection method for electrons,highlight the potential of novel laser-plasma optics.

关键词： optics Plasma conventional

Virulence of Pythium deliense causing soft rot in Ginger,a new report from Kerala,India

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Studies in Fungi 2021年第1期6卷 488-494页

作者： Vafa AL Anju JV Rajan pp The Zamorin’s Guruvayurappan College KozhikodeKerala 673014India

Ginger(Zingiber officinale Rosc.)rhizome is widely used as a spice and medicine and,its large-scale production is being seriously affected by several fungal and bacterial *** rot disease caused by various species of Pythium is the most destructive among *** showing soft rot symptoms were collected from the ginger fields of Kozhikode and Wayanad districts of *** study of the morphology,growth parameters and molecular characteristics of the fungal isolates confirmed the identity of Pythium *** pathogenicity of the isolates was demonstrated by in vitro and in vivo *** is the first report of the pathogen,*** causing soft rot in ginger from Kerala,India.

关键词： isolation pathogenicity rhizome spice Zingiber officinale

Study of sexual behaviour in relation to sexually transmitted infections(STIs) among Nigerian undergraduates

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Asian Pacific Journal of Tropical Medicine 2009年第6期2卷 71-77页

作者： Agan TU Ekabua JE Nyong pp Ndifon WO Itam HI Department of Obstetrics & Gynaecology University of Calabar Nigeria Department of Community Medicine

Objective:To determine their reproductive health behaviour concerning fidelity and psychosocial intimacy in the face of current trends in sexually transmitted infections(STIs) and human immunodeficiency virus(HIV)/ acquired immune deficiency syndromes(AIDS) ***:A cross-sectional comparative male/female cohort study using a semi-structured questionnaire to interview sexually activity of undergraduates in University of Calabar(UNICAL) was conducted over a three(3) month period in *** used were number of sexual partners,frequency of sexual intercourse in the 6 months preceding,knowledge of last menstrual period(LMP),methods of self-protection against STIs,number of unwanted pregnancies terminated,and contraceptive ***:Of the 1 337 respondents,648 out of 684 males(94.7%) and 543 out of 653 females (83.2%) had multiple sex *** gender difference was statistically significant(P 0.05).While 275(42.0%) of the females could state the exact last menstrual period(LMP),only 14(2.1%) males could remember their mates LMP,and 496(72.5%) of males did not know anything about mates’menstrual *** was no statistical significance difference(P >0.05 ) between both groups in their safe sex practices. One hundred and sixty three(23.8%) male and one hundred and forty one(22.8%) females used condoms,while 347(50.7%) of male and 337(51.6%) of females did *** hundred and seventy six(40.0%) of males’mates had terminated pregnancies and three hundred and forty eight(53.3%) of female respondents admitted doing ***(4.60%) females terminated pregnancy more than six *** had more knowledge of contraceptives but males used

关键词： Sexual intimacy Undergraduates Safe-sex

Synthesis,Structure and Hydrogenation Property of trans-PdCl_(2){Ph_(2)P[o-C_(6)H_(4)CH(OC_(2)H_(5))_(2)]}_(2)

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Chemical Research in Chinese Universities 1997年第4期13卷 117-120页

作者： Xu, pp Gao, JX Zhou, ZH Wang, JZ Chen, Z Hu, SZ Wan, HL XIAMEN UNIV DEPT CHEMSTATE KEY LAB PHYS CHEM SOLID SURFACEXIAMEN 361005PEOPLES R CHINA XIAMEN UNIV INST PHYS CHEMXIAMEN 361005PEOPLES R CHINA

Ｓｙｎｔｈｅｓｉｓ，ＳｔｒｕｃｔｕｒｅａｎｄＨｙｄｒｏｇｅｎａｔｉｏｎＰｒｏｐｅｒｔｙｏｆｔｒａｎｓ┐ＰｄＣｌ２｛Ｐｈ２Ｐ［ｏ┐Ｃ６Ｈ４ＣＨ（ＯＣ２Ｈ５）２］｝２＊ＸＵＰｉａｎ－ｐｉａｎ，ＧＡＯＪｉｎｇ－ｘｉｎｇ＊＊... 详细信息

Ｓｙｎｔｈｅｓｉｓ，ＳｔｒｕｃｔｕｒｅａｎｄＨｙｄｒｏｇｅｎａｔｉｏｎＰｒｏｐｅｒｔｙｏｆｔｒａｎｓ┐ＰｄＣｌ２｛Ｐｈ２Ｐ［ｏ┐Ｃ６Ｈ４ＣＨ（ＯＣ２Ｈ５）２］｝２＊ＸＵＰｉａｎ－ｐｉａｎ，ＧＡＯＪｉｎｇ－ｘｉｎｇ＊＊，ＺＨＯＵＺｈａｏ－ｈｕｉ，ＷＡＮ...

关键词： Palladium complex Hydrogenation Crystal structure

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pp殿下的新年“食事”

中学生（青春悦读） 2013年第1期 64-64,F0003页

作者： pp殿下

过新年啦,放假啦,逛美食街去!好多美食啊,这也想吃,那也想吃,什么都想吃!咦,pp殿下呢?啊!pp殿下,你在吃什么?招牌上怎么写的是……猫耳朵!这是怎么回事啊?快给我们解释一下吧!

关键词： pp

Effect of extraction method on Mycochemicals and Proximate composition of Pyrrhoderma noxium(Corner)***&***,(Hymenochaetales,Basidiomycota)

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Studies in Fungi 2019年第1期4卷 223-229页

作者： Nagadesi PK Naveen Babu D Suneetha NN Prasad KSM Devi pp Department of Botany P.G.BlockAndhra Loyola CollegeNear GunadalaVijayawada-8Andhra PradeshIndia Department of Biochemistry R&D WingSt.Joseph Dental CollegeDuggiralaEluruAndhra PradeshIndia

Several medicines obtained from Pyrrhoderma mushrooms are widely used against several diseases throughout the ***,in preparation of crude drugs/folk medicines of mushroom *** noxium collected from Krishna district,Andhra Pradesh,India was studied and identified *** present work aims to test the presence of Mycochemicals and proximate composition for standardization of powder of *** solvents used for extraction and method of extraction played a vital role on mycochemical and proximate composition of *** *** maceration water bath assisted extraction method is the best extraction method compared to maceration and Reflux extraction methods for all parameters studied in this *** present study shows the extraction method and type of solvent influencing the presence of mycochemical composition like alkaloids,carbohydrates,phenols,flavonoids,tannins,terpenoids,diterpenoids,and anthocyanin in hymenochaetales *** proximate composition evaluation is very much useful for standardisation of *** in powder *** will help to identify the genuine species and check for adulteration of powder available commercially.

关键词： Extraction type Hymenophore Phytochemicals Phenotypical Phellinus noxius

Applications of object detection networks in high-power laser systems and experiments

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High Power Laser Science and Engineering 2023年第1期11卷 52-60页

作者： Jinpu Lin Florian Haberstroh Stefan Karsch Andreas Döpp Ludwig-Maximilians-Universität München GarchingGermany

The recent advent of deep artificial neural networks has resulted in a dramatic increase in performance for object classification and *** pre-trained with everyday objects,we find that a state-of-the-art object detection architecture can very efficiently be fine-tuned to work on a variety of object detection tasks in a high-power laser *** this paper,three exemplary applications are *** show that the plasma waves in a laser±plasma accelerator can be detected and located on the optical *** plasma wavelength and plasma density are estimated ***,we present the detection of all the peaks in an electron energy spectrum of the accelerated electron beam,and the beam charge of each peak is estimated ***,we demonstrate the detection of optical damage in a high-power laser *** reliability of the object detector is demonstrated over1000 laser shots in each *** study shows that deep object detection networks are suitable to assist online and offline experimental analysis,even with small training *** believe that the presented methodology is adaptable yet robust,and we encourage further applications in Hz-level or kHz-level high-power laser facilities regarding the control and diagnostic tools,especially for those involving image data.

关键词： high repetition rate laser±plasma accelerators machine learning object detection optical diagnostics

ZUR ?KONOMIE ?GYPTENS BIS ZUM ENDE DES NEUEN REICHES

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Journal of Ancient Civilizations 2017年 211-228页

作者： Heidi K?pp-Junk ?gyptologie Universit?t Trier

Der Nil bildete mit seinen Nebenflüssen und Kan?len sowie einem weitverzweigten System von Landwegen ein zusammenh?ngendes Transportund Verkehrsnetz,das eine florierende Wirtschaft erm?*** dem

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