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Optical tracking of picosecond coherent phonon pulse focusing inside a sub-micron object

Light(Science & Applications) 2016年第1期5卷 653-659页

作者： Thomas Dehoux Kenichi Ishikawa Paul H Otsuka Motonobu Tomoda Osamu Matsuda Masazumi Fujiwara Shigeki Takeuchi Istvan A Veres Vitalyi E Gusev oliver b wright Institut Lumière Matière UMR5306UniversitéLyon 1-CNRSUniversitéde Lyon69622 VilleurbanneFrance Division of Applied Physics Faculty of EngineeringHokkaido UniversitySapporo 060-8628Japan Research Institute for Electronic Science Hokkaido UniversitySapporo 001-0020Japan School of Science and Technology Kwansei Gakuin UniversitySandaHyogo 669-1337Japan Department of Electronic Science and Engineering Kyoto UniversityKyoto 615-8510Japan Research Centre for Non-Destructive Testing GmbH Altenberger Strasse 69A-4040 LinzAustria Laboratoire d'Acoustique de l'Université du MaineLe Mans 72085France

by means of an ultrafast optical technique,we track focused gigahertz coherent phonon pulses in objects down to sub-micron in *** light pulses illuminating the surface of a single metal-coated silica fibre generate longitudinal-phonon wave *** of visible probe light pulses from the fibre surface allows the vibrational modes of the fibre to be detected,and brillouin optical scattering of partially transmitted light pulses allows the acoustic wavefronts inside the transparent fibre to be continuously *** thereby probe acoustic focusing in the time domain resulting from generation at the curved fibre *** analytical model,supported by three-dimensional simulations,suggests that we have followed the focusing of the acoustic beam down to a~150-nm diameter waist inside the *** work significantly narrows the lateral resolution for focusing of picosecond acoustic pulses,normally limited by the diffraction limit of focused optical pulses to~1μm,and thereby opens up a new range of possibilities including nanoscale acoustic microscopy and nanoscale computed tomography.

关键词： acoustic–optic fibre optical scattering picosecond ultrasonics

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Reliable off-grid power supply utilizing green hydrogen

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Clean Energy 2021年第3期5卷 441-446页

作者： oliver borm Stephen b.Harrison sbh4 GmbH Kranzlstraße 2182538 GeretsriedGermany

Green hydrogen produced from wind,solar or hydro power is a suitable electricity storage *** is typically employed as mid-to long-term energy storage,whereas batteries cover short-term energy *** hydrogen can be produced by any available electrolyser technology[alkaline electrolysis cell(AEC),polymer electrolyte membrane(PEM),anion exchange membrane(AEM),solid oxide electrolysis cell(SOEC)]if the electrolysis is fed by renewable *** the electrolysis operates under elevated pressure,the simplest way to store the gaseous hydrogen is to feed it directly into an ordinary pressure vessel without any external *** most efficient way to generate electricity from hydrogen is by utilizing a fuel *** fuel cells seem to be the most favourable way to do *** increase the capacity factor of fuel cells and electrolysers,both functionalities can be integrated into one device by using the same *** this article,different reversible technologies as well as their advantages and readiness levels are presented,and their potential limitations are also discussed.

关键词： green hydrogen microgrid stand-alone power system SAPS hydrogen storage electrolysis fuel cells AEC PEM AEM SOEC

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Progress in carbon dioxide separation and capture: A review

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Journal of Environmental Sciences 2008年第1期20卷 14-27页

作者： Hongqun Yang Zhenghe Xu Maohong Fan Rajender Gupta Rachid b Slimane Alan E bland Ian wright Department of Chemical and Materials Engineering University of Alberta EdmontonABT6G2G6 Canada School of Materials Science and Technology Georgia Institute of Technology Atlanta GA 30332 USA Gas Technology Institute Des Plaines IL 60018 USA Western Research Institute Laramie Wyoming 82072 USA Oak Ridge National Laboratory P.O. Box 2008 Oak Ridge TN 37831 USA

This article reviews the progress made in CO2 separation and capture research and engineering. Various technologies, such as absorption, adsorption, and membrane separation, are thoroughly discussed. New concepts such as chemical-looping combustion and hydrate-based separation are also introduced briefly. Future directions are suggested. Sequestration methods, such as forestation, ocean fertilization and mineral carbonation techniques are also covered. Underground injection and direct ocean dump are not covered.

关键词： coal flue gas carbon dioxide sorbent absorption adsorption membrane separation sequestration

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ON THE EXISTENCE OF SOLUTIONS TO A bI-PLANAR MONGE-AMPèRE EQUATION

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Acta Mathematica Scientia 2020年第2期40卷 379-388页

作者： Ibrokhimbek AKRAMOV Marcel oliver Institut für Angewandte Analysis Universitat Ulm89069 UlmGermany School of Engineering and Science Jacobs University28759 BremenGermany

In this article,we consider a fully nonlinear partial differential equation which can be expressed as a sum of two Monge-Ampere operators acting in different two-dimensional coordinate *** equation is elliptic,for example,in the class of convex *** show that the notion of Monge-Ampere measures and Aleksandrov generalized solutions extends to this equation,subject to a weaker notion of convexity which we call bi-planar *** the equation is also elliptic in the class of bi-planar convex functions,the contrary is not necessarily *** is a substantial difference compared to the classical Monge-Ampere equation where ellipticity and convexity *** provide explicit counter-examples:classical solutions to the bi-planar equation that satisfy the ellipticity condition but are not generalized solutions in the sense *** conclude that the concept of generalized solutions based on convexity arguments is not a natural setting for the bi-planar equation.

关键词： Fully nonlinear elliptic equations generalized solution bi-planar convexity

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Entangled-photons generation with quantum dots

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Chinese Physics b 2018年第2期27卷 140-153页

作者：李远丁飞 oliver G Schmidt Institute for Integrative Nanosciences IFW Dresden HelmholtzstraBe 20. 01069 Dresden. Germany Integrative for Solid State Physics. Leibniz University of Hunnover. Appelstbe 2.30 167 Hannovel Germany

Entanglement between particles is a crucial resource in quantum information processing, an important example of which is the exploitation of entangled photons in quantum communication protocols. Among the different available sources of entangled photons, semiconductor quantum dots （QDs） excel owing to their deterministic emission properties, potential for electrical injections, and direct compatibility with semiconductor manufacturing techniques. Despite the great promises, QD-based sources at＇e far from being ideal. In particular, such sources present several critical issues, which require the overcoming of challenges pertaining to spectral tunability, entanglement fidelity, photon indistinguishability and brightness. In this article, we will discuss the potential solutions to these problems and review the recent progress in the field.

关键词： quantum information entangled-photon source quantum dots

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Species Account of Anura ns from the Western Slope of Mt. Kita nglad, Mindanao Island, Philippines

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Asian Herpetological Research 2021年第1期12卷 76-87页

作者： Elsa May Delima bARON Mark oliver D.MARIN benjo A.LOGRAMONTE Alma b.MOHAGAN biology Natural Sciencesand Math Division.Arts and Sciences DepartmentSan Pedro CollegeDavao City 8000MindanaoPhilippines biology Department College of Arts and SciencesCentral Mindanao UniversityMusuanBukidnon 8714MindanaoPhilipines

The Mt. Kitanglad Range is one of the country’s important key biodiversity sites;however, information about anuran diversity in this protected area remains depauperate. Herein we provided accounts of anuran species from high-elevation forests, in three sites of the western slope of Mt. Kitanglad range. The combined belt-transect sampling and microha bitat searches accounted for 13 species representing five families. The most represented family was Rhacophoridae with five representative species of the genus Philautus. Twelve out of the 13 species documented in the current survey are endemic. Four previously unaccounted species(Pelophr yne brevipes, Pulchrana grandocula, Sanguirana mearnsi, and Philautus surrufus) were added and brought the total anurans known from Mt. Kitanglad to 26 species. Most of the species were also recorded in forested sites, suggestive of their lesser affinity to non-forested ecosystems. The additional species detected during our survey may also imply that full understanding of anuran diversity of Mt. Kitanglad remains far from complete.

关键词： key biodiversity area Mindanao faunal region Philippine endemic anurans upper elevation forests wildlife inventory in Mindanao

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Gallbladder carcinoma: prognostic factors and therapeutic options

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World Journal of Gastroenterology 2015年第43期21卷 12211-12217页

作者： Thorsten oliver Goetze Institut of Clinical Cancer Research UCT-University Cancer Center Frankfurt

The outcome of gallbladder carcinoma is poor,and the overall 5-year survival rate is less than 5%. In early-stage disease,a 5-year survival rate up to 75% can be achieved if stage-adjusted therapy is performed. There is wide geographic variability in the frequency of gallbladder carcinoma,which can only be explained by an interaction between genetic factors and their alteration. Gallstones and chronic cholecystitis are important risk factors in the formation of gallbladder malignancies. Factors such as chronic bacterial infection,primary sclerosing cholangitis,an anomalous junction of the pancreaticobiliary duct,and several types of gallbladder polyps are associated with a higher risk of gallbladder cancer. There is also an interesting correlation between risk factors and the histological type of cancer. However,despite theoretical risk factors,only a third of gallbladder carcinomas are recognized preoperatively. In most patients,the tumor is diagnosed by the pathologist after a routine cholecystectomy for a benign disease and is termed ‘‘incidental or occult gallbladder carcinoma''(IGbC). A cholecystectomy is performed frequently due to the minimal invasiveness of the laparoscopic technique. Therefore,the postoperative diagnosis of potentially curable early-stage disease is more frequent. A second radical re-resection to complete a radical cholecystectomy is required for several IGbCs. However,the literature and guidelines used in different countries differ regarding the radicality or T-stage criteria for performing a radical cholecystectomy. The NCCN guidelines and data from the German registry(GR),which records the largest number of incidental gallbladder carcinomas in Europe,indicate that carcinomas infiltrating the muscularis propria or beyond require radical surgery. According to GR data and current literature,a wedge resection with a combined dissection of the lymph nodes of the hepatoduodenal ligament is adequate for T1 b and T2 carcinomas. The reason for a

关键词： Gallbladder carcinoma Stage-adjusted therapy Radic

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基于随机暴雨移置方法的城市设计暴雨分析

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水科学进展 2020年第4期31卷 583-591页

作者：周正正刘曙光 Daniel b wright 同济大学水利工程系上海200092 Department of Civil and Environmental Engineering University of WisconsinMadison WI 53706USA

城市地区暴雨洪灾发生频繁,合理计算设计暴雨是解决城市洪涝的重要前提。采用随机暴雨移置方法(Stochastic Storm Transposition,SST),设定暴雨移置区并提取出暴雨目录,通过区域性概率重采样与暴雨空间变换相结合的方式进行降雨频率分析... 详细信息

城市地区暴雨洪灾发生频繁,合理计算设计暴雨是解决城市洪涝的重要前提。采用随机暴雨移置方法(Stochastic Storm Transposition,SST),设定暴雨移置区并提取出暴雨目录,通过区域性概率重采样与暴雨空间变换相结合的方式进行降雨频率分析,估计本地化的极端暴雨频率。以上海地区为例,研究发现暴雨移置区内暴雨分布具有空间异质性,暴雨随机移置概率不均,计算得到的设计暴雨方案包含了降雨时空分布信息,在不同重现期下设计暴雨的时空结构存在变异性,说明传统方法中采用的简化雨型和均一化空间分布假设会增加设计暴雨的不确定性。

关键词：设计暴雨随机暴雨移置法城市流域上海市

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Squamous cell carcinoma after radiofrequency ablation for barrett's dysplasia

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World Journal of Gastroenterology 2014年第15期20卷 4453-4456页

作者： Sebastian S Zeki Rehan Haidry Manuel Justo-Rodriguez Laurence b Lovat Nicholas A wright Stuart A McDonald Centre for Tumour biology Bart’s Cancer InstituteLondon EC1M 6BQUnited Kingdom Research Department of General Surgery University College LondonLondon WC1E 6BTUnited Kingdom Department of Pathology University College LondonLondon WC1E 6BTUnited Kingdom

barrett’s oesophagus(bO)is a usually indolent condition that occasionally requires endoscopic *** ablation(RFA)is an effective endoscopic treatment for high grade dysplasia(HGD)and intramucosal cancer in *** has a good efficacy,durability and safety profile although complications can *** we describe a case of RFA in a patient with high grade *** the response to treatment was initially very good with the development of neosquamous epithelium,the patient very rapidly developed a squamous cell cancer of the oesophagus confirmed on radiology,histology and *** sequencing confirmed that the original HGD and the squamous cell cancer(SCC)were derived from separate clonal *** report highlights the fact that SCC of the oesophagus has been noted after endoscopic ablation for bO previously and suggest that ablation of bO may encourage the clonal expansion of cells carrying carcinogenic mutations once a dominant clonal population has been eradicated.

关键词： Squamous carcinoma oesophagus barrett's oesophagus Radiofrequency ablation Squamous cell cancer High grade dysplasia

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Mechanical thrombectomy in children and adolescents:report of five cases and literature review

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Stroke & Vascular Neurology 2018年第4期3卷 245-252页

作者： Pervinder bhogal Victoria Hellstern Muhammad AlMatter oliver Ganslandt Hansjörg bäzner Marta Aguilar Pérez Department of Interventional Neuroradiology Royal London HospitalLondonUK Neuroradiological Clinic NeurocenterKlinikum StuttgartStuttgartGermany Neurosurgical Clinic NeurocenterKlinikum StuttgartStuttgartGermany Medical Faculty University Duisburg-EssenDuisburgGerman

background Paediatric arterial ischaemic stroke is an important cause of morbidity and mortality among ***,there are no recommendations regarding mechanical thrombectomy in children despite overwhelming evidence of improved outcomes in ***,the need for individual case reports and case series is important to highlight potential advantages and disadvantages in this *** descriptions We retrospectively searched our prospectively maintained database of patients undergoing mechanical thrombectomy for ischaemic *** describe five children,aged between 7 and 17,who underwent mechanical thrombectomy for acute ischaemic *** provide an account of their clinical presentations,operative treatment and postoperative *** Mechanical thrombectomy in children,especially older children,can be performed safely and with existing *** a randomised controlled trial would provide compelling evidence of the potential advantages to this technique,the lack of this should not prevent the use of this procedure by trained neurointerventionists.

关键词： maintained throm treatment

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