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Incidental congenital coronary artery vascular fistulas in adults:Evaluation with adenosine-13N-ammonia PET-CT

World Journal of Cardiology 2018年第10期10卷 153-164页

作者： Salah Am Said Aly Agool Arno Hm moons mounir WZ Basalus Nils RL Wagenaar Rogier LG Nijhuis jutta m schroeder-tanka Riemer HJA Slart Department of Cardiology Hospital Group TwenteAlmelo-Hengelo 7555 DLOverijsselThe Netherlands Department of Nuclear medicine Hospital Group TwenteAlmelo-Hengelo 7555 DLOverijsselThe Netherlands Department of Cardiology Slotervaart HospitalAmsterdam 1066 ECNorth HollandThe Netherlands Department of Cardiology Hospital Onze Lieve Vrouwe GasthuisLocation WestAmsterdam 1061 AENorth HollandThe Netherlands Department of Nuclear medicine and molecular Imaging University Medical Center GroningenGroningen 9713 GZThe Netherlands Faculty of Science and Technology Biomedical Photonic ImagingUniversity of TwenteEnschede 7522 NBThe Netherlands

AIm To assess the functionality of congenital coronary artery fistulas(CAFs) using adenosine stress ^(13)N-ammonia positron emission tomography computed tomography(PET-CT).mETHODS Congenital CAFs were incidentally detected during coronary angiography(CAG) procedures in 11 adult patients(six males and five females) with a mean age of 64.3 years(range 41-81). Patients were collected from three institutes in the Netherlands. The characteristics of the fistulas(origin, pathway and termination), multiplicity of the origins and pathways of the fistulous vessels were assessed by CAG. Five patients underwent adenosine pharmacologic stress ^(13)N-ammonia PET-CT to assess myocardial perfusion and the functional behavior of the fistula. RESULTS Eleven patients with 12 CAFs, 10 unilateral and one bilateral, originating from the left anterior descending coronary artery(n = 8), right coronary artery(n = 2) and circumflex(n = 2). All fistulas were of the vascular type, terminating into either the pulmonary artery(n = 11) or coronary sinus(n = 1). The CAG delineated the characteristics of the fistula(origin, pathway and termination). multiplicity of the origins and pathways of the fistulous vessels were common in most fistulas(8/12, 67% and 9/12, 75%, respectively). multiplicity was common among the different fistula components(23/36, 64%). Adenosine pharmacologic stress ^(13)N-ammonia PET-CT revealed normal myocardial perfusion and ejection fraction in all but one patient, who showed a reduced ejection *** PET-CT may be helpful for assessing the functional status of congenital CAFs in selected patients regarding clinical decision-making. Studies with a larger patient series are warranted.

关键词： Coronary angiography Coronary-pulmonary artery fistulas Adenosine ammonia positron emission tomography computed tomography Coronary vascular fistulas Congenital coronary artery fistulas

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Efficient contraflow algorithms for quickest evacuation planning

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Science China mathematics 2018年第11期61卷 2079-2100页

作者： Urmila Pyakurel Hari Nandan Nath tanka Nath Dhamala Central Department of mathematics Tribhuvan University Department of mathematics Bhaktapur Multiple Campus Tribhuvan University

The optimization models and algorithms with their implementations on flow over time problems have been an emerging field of research because of largely increasing human-created and natural disasters *** an optimal use of transportation network to shift affected people and normalize the disastrous situation as quickly and efficiently as possible,contraflow configuration is one of the highly applicable operations research(OR)*** increases the outbound road capacities by reversing the direction of arcs towards the safe destinations that not only minimize the congestion and increase the flow but also decrease the evacuation time *** this paper,we sketch the state of quickest flow solutions and solve the quickest contraflow problem with constant transit times on arcs proving that the problem can be solved in strongly polynomial time O(nm^2(long n)~2)where n and m are number of nodes and number of arcs,respectively in the *** contraflow solution has the same computational time bound as that of the best min-cost flow ***,we also introduce the contraflow approach with load dependent transit times on arcs and present an efficient algorithm to solve the quickest contraflow problem *** the claim,our computational experiments on Kathmandu road network and on randomly generated instances perform very well matching the theoretical *** a sufficiently large number of evacuees,about double flow can be shifted with the same evacuation time and about half time is sufficient to push the given flow value with contraflow reconfiguration.

关键词： evacuation planning contraflow flow over time quickest flow load dependent transit time

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LES of film cooling for different jet fluids

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航空动力学报 2007年第4期22卷 521-530页

作者： P. Renze W. schroeder m. meinke Aerodynamisches Institut RWTH Aachen 52062 Aachen Germany

The present paper investigates the impact of the velocity and density ratio on the turbulent mixing process in gas turbine blade film cooling.A cooling fluid is injected from an inclined pipe at α=30° into a turbulent boundary layer profile at a freestream Reynolds number of Re∞=*** jet-in-a-crossflow(JICF) problem is investigated using large-eddy simulations(LES).The governing equations comprise the Navier-Stokes equations plus additional transport equations for several species to simulate a non-reacting gas mixture.A variation of the density ratio is simulated by the heat-mass transfer analogy,i.e.,gases of different density are effused into an an air crossflow at a constant *** efficient large-eddy simulation method for low subsonic flows based on an implicit dual time-stepping scheme combined with low mach number preconditioning is *** numerical results and experimental velocity data measured using two-component particle-image velocimetry (PIV) are in excellent *** results show the dynamics of the flow field in the vicinity of the jet hole,i.e.,the recirculation region and the inclination of the shear layers,to be mainly determined by the velocity ***,evaluating the cooling efficiency downstream of the jet hole the mass flux ratio proves to be the dominant similarity parameter,i.e.,the density ratio between the fluids and the velocity ratio have to be considered

关键词：航空推进系统仿真横向流动式喷气密度比速率冷却效率薄雾冷却

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Increase in efficiency of dye-sensitized solar cells by porous TiO_2 layer modification with gadolinium-containing thin layer

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Journal of Rare Earths 2011年第8期29卷 783-786页

作者： maciej Zalas mariusz Walkowiak Grzegorz schroeder Faculty of Chemistry Adam Mickiewicz University Institute of Non-Ferrous metals Branch in Poznań Central Laboratory of Batteries and Cells

modified with gadolinium-containing layer, nanoporous titania electrode and its application in dye-sensitized solar cells were reported. The electrode prepared was characterized with UV-Vis and X-ray diffraction （XRD） techniques. The amount of gadolinium was measured with inductively coupled plasma-optical emission spectrometry （ICP-OES） experiments. The modified electrode showed reduced N3 dye adsorption ability, but increased light conversion efficiency in comparison with the non-modified electrode. The overall conversion efficiencies, determined under 400 W/m2 irradiation with tungsten-halogen lamp at room temperature, were 0.55% for non-modified and 0.74% for modified electrodes.

关键词： dye-sensitized solar cell surface modification of TiO2 Gd-doped TiO2 rare earths

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New Agri-Silvo-Pastoral model Utilizing Terrace RiserEnhancing Crop and Livestock Production Developed inNepal

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Journal of Agricultural Science and Technology(A) 2019年第6期9卷 371-389页

作者： Barakoti tanka Prasad Sah Raj Kumar Agricultural Research Station Nepal Agricultural Research CouncilDhankuta 56800PakhribasNepal

Twelve fodder species with maize (Zea mays) and millet (Eleusine coracana) were evaluated under agri-silvo-pastoral system along the Terrace risers (T-risers) of cropping land in the Agricultural Research Station Pakhribas, Nepal. major aim of innovative agroforestry experiment designed and tested first time in Nepal was to utilize one-third land in risers of cropping terraces due to limited lands of smallholders to produce green fodders needed for livestock. Trees were planted at 1.5 m on the terrace edges and ground fodders at 30-50 cm on the risers. Trees were not allowed to grow tall to avoid shade effect on crops grown in terraces. They were felled at breast height in second year growing coppices for fodder. The results showed higher survival (76% to 100%), growth (1-3 m high) and yield of improved forages and fodder trees indicating potential for cultivation on T-risers. Dry matter (Dm) of tree fodders varied 31%-49%, and ground fodders 19%-32%. Dm yields ranged 3.0 t/ha (Stylosanthes guanensis) to 26.5 t/ha (Pennisetum purpureum). Combined effects of fodder species on major hill crops, maize and finger millet growth, yield and other attributes were monitored in the terraces. most mean data were significant and at par between the treatments. Better combinations of tree and ground fodders for higher grain and stover yields (3.1 t/ha and 3.4 t/ha, respectively) of maize were Grewia optiva/Thysalonaema maxima, Desmodium intortum, Ficus auriculata/Setaria anceps, D. intortum (2.7 t/ha and 3.3 t/ha, respectively). Promising combinations for finger millet growth and yields (2-3 t/ha) were G. optiva/T. maxima, Bauhinia purpurea/S. anceps, F. semicordata/P. cetaceum. Soil analysis result showed positive impact of fodders on the risers where organic matter was highly increased after three years. Farmers and stakeholders also evaluated this technology that has been successful and recommended for similar ecological regions.

关键词： Terrace riser fodder trees forage species maize and millet agri-silvo-pastoral system new model.

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Assessment of VIIRS 375 m active fire using tropical peatland combustion algorithm applied to Landsat-8 over Indonesia’s peatlands

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International Journal of Digital Earth 2020年第12期13卷 1695-1716页

作者： Parwati Sofan David Bruce Wilfrid schroeder Eriita Jones Jackie marsden Scarce Resources and Circular Economy(ScaRCE) University of South AustraliaScienceTechnologyEngineering and Mathematics(STEM)Adelaide/Mawson LakesAustralia Remote Sensing Application Center of Indonesian Institute of Aeronautics and Space(LAPAN) JakartaIndonesia National Oceanic and Atmospheric Administration(NOAA) College ParkMDUSA dImagery LandgateMidlandAustralia

VIIRS 375 m active fire data(VNP14ImG),the highest spatial resolution available cost-free fire product,were assessed for representing fire in typical degraded tropical peatlands in *** results of applying the Tropical Peatland Combustion Algorithm to Landsat-8(ToPeCAl-L8)daytime imagery were utilised as the fire *** permit the comparison of non-simultaneous VNP14ImG and ToPeCAl-L8,peatland fire propagation speeds resulting from previous study using TET-1 data in Central Kalimantan’s peatlands were *** peatland fires were still within 750 m from their source over 15 h under uniform conditions,except for very large *** detection rates of nighttime VNP14ImG compared with ToPeCAl-L8 showed about 80%agreement for small fire areas(m buffer(cluster buffer)of VNP14ImG active fires with an integration of nighttime and daytime acquisitions,produced a probability of detection up to 90%.These results generated a recommendation for implementing cluster buffer analysis and integration of nighttime and daytime analysis of VNP14ImG data for better accuracy in fire detection for ground fire *** also demonstrate the utility of the ToPeCAl-L8 algorithm with VIIRS 375 m active fire data.

关键词： Active fire assessment VIIRS 375 m active fire(VNP14ImG) ToPeCAlLandsat-8 peatland fires

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Self-assembled microtubular electrodes for on-chip low-voltage electrophoretic manipulation of charged particles and macromolecules

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microsystems & Nanoengineering 2022年第1期8卷 341-352页

作者： Apratim Khandelwal Nagendra Athreya michael Q.Tu Lukas L.Janavicius Zhendong Yang Olgica milenkovic Jean-Pierre Leburton Charles m.schroeder Xiuling Li Department of Electrical and Computer Engineering University of Illinois Urbana-ChampaignUrbanaIL 61801USA Nick Holonyak micro and Nanotechnology Laboratory University of Illinois Urbana-ChampaignUrbanaIL 61801USA Department of Chemical Engineering University of Illinois Urbana-ChampaignUrbanaIL 61801USA Beckman Institute for Advanced Science and Technology University of Illinois Urbana-ChampaignUrbanaIL 61801USA Department of Electrical and Computer Engineering Microelectronics Research CenterUniversity of TexasAustinTX 78758USA Coordinated Science Laboratory University of Illinois Urbana-ChampaignUrbanaIL 61801USA

On-chip manipulation of charged particles using electrophoresis or electroosmosis is widely used for many applications,including optofluidic sensing,bioanalysis and macromolecular data *** hereby demonstrate a technique for the capture,localization,and release of charged particles and DNA molecules in an aqueous solution using tubular structures enabled by a strain-induced self-rolled-up nanomembrane(S-Rum)***-in 3D electrodes that are embedded in cylindrical S-Rum structures and biased by a constant DC voltage are used to provide a uniform electrical field inside the microtubular *** charged-particle manipulation is achieved at a bias voltage ofmagnitude lower than the required potential in traditional DC electrophoretic ***,Poisson-Boltzmann multiphysics simulation validates the feasibility and advantage of our microtubular charge manipulation devices over planar and other 3D variations of microfluidic *** work lays the foundation for on-chip DNA manipulation for data storage applications.

关键词： electrodes cylindrical planar

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mechanism of Infrared Detection and Transduction by Beetle melanophila Acuminata In memory of Jerry Wolken

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Journal of Bionic Engineering 2011年第2期8卷 129-139页

作者： meir Israelowitz Jeong-Ah Kwon Syed W. H. Rizvi Christoph Gille Herb P. von schroeder Biomimetics Technologies Inc. 191 Ellis Avenue Toronto Ontario M6S 2X4 Canada Hillman Cancer Center Research Pavilion Floor 2 2.35 5117 Centre Avenue Pittsburgh PA 15213 USA Institute of Biochemistry CharitO Universiaitsmedizin Monbijourstr. 2 10117 Berlin Germany University of Toronto 399 Bathurst Street 2E Tolvnto ON M5T2SS Canada

The melanophila acuminata beetle is attracted to forest fires via a pair of infrared sensory organs composed of sensilla. Our histological work showed that each sensillum contains lipid layers surrounding a protein layer and a unique polysaccharide base that is associated with a neuron to each sensillum. Infrared microscopy showed that the protein region maximally absorbs infrared radiation at 3 ~tm wavelength and at 10 ~tm, which corresponds to the known radiation produced by forest fires at 3 ~tm. mathematical calculations showed that the physical properties of the sensilla are such that the expected temperature rise is insufficient for transduction of the infrared signal through mechanical means or as a thermal receptor as previously thought; hence the protein plays the pivotal role in perception of single photons and transmission of the signal within the sensilla.

关键词： sensory organs sensillum insect radiation fire

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结合自然语言处理与改进层次分析法的乘用车驾驶舒适性评价

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清华大学学报（自然科学版） 2016年第2期56卷 137-143页

作者：卢兆麟李升波 schroeder Felix 周吉晨成波清华大学汽车工程系汽车节能与安全国家重点实验室北京100084 合肥学院设计艺术系合肥230601 奥迪汽车(中国)企业管理有限公司北京100015

为了有效和准确地评价乘用车驾驶舒适性,构建了"人-机-环境"系统下的汽车驾驶舒适性本体模型,并对驾驶舒适性的形成机制进行了阐述。通过用户访谈实验并基于改进的"词频-逆向文件频率"(TF-IDF)方法对主题词进行提取,获得影响驾驶舒适性... 详细信息

为了有效和准确地评价乘用车驾驶舒适性,构建了"人-机-环境"系统下的汽车驾驶舒适性本体模型,并对驾驶舒适性的形成机制进行了阐述。通过用户访谈实验并基于改进的"词频-逆向文件频率"(TF-IDF)方法对主题词进行提取,获得影响驾驶舒适性的主要因素并进行分类,在此基础上建立递阶层次结构;针对传统层次分析法(AHP)的不足,以三标度取代九标度以保证精确性,通过Delphi实验,构造两两比较判别矩阵后再进行处理,以计算各评价指标的权重,并对该指标体系进行一致性检验。以C级乘用车为例,验证了该评价方法的有效性。该方法为乘用车的驾驶舒适性评价提供了一种可行的技术支持。

关键词：乘用车驾驶舒适性评价指标层次分析法自然语言处理

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Comparison of antibody detection with <i>Blastomycesdermatitidis</i>yeast lysate antigens in serum specimens from immunized rabbits and infected dogs

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Open Journal of Immunology 2011年第3期1卷 74-79页

作者： Will Christenson Rachel Horton Kayla Campbell Kelly meacham Amber schroeder Gene m. Scalarone 不详

This present study was designed to evaluate B. dermatitidis antigens, prepared from two isolates (B5896, 597), when the yeast cells were allowed to lyse in distilled water for one day or seven days. The indirect enzyme-linked immunosorbent assay (ELISA) was used to determine the ability of the lysate reagents to detect antibodies in 30 rabbit and 30 dog serum specimens. mean absorbance values with B5896 lysate antigen ranged from 1.637 (day 1) to 1.461 (day 7) and absorbance values with 597 antigen ranged from 1.579(day 1) to 1.396 (day 7) with the serum specimens from immunized rabbits. Serum specimens from infected dogs yielded absorbance values ranging from 1.672 (day 1) to 1.763 (day 7) with the B5896 and values ranging from 1.909 (day 1) to 1.224 (day 7) with the 597. Optimal reactivity was obtained with the day 1 lysate using both lysate antigens against the rabbit sera and with the 597 antigen against the dog sera. Slightly greater reactivity was evidenced with the day 7 B5896 antigen when the dog sera was tested. Comparative studies are continuing in order to produce an optimal anti-genic preparation for antibody detection in blastomycosis.

关键词： ELISA Blastomycesdermatitidis Antibody Detection Lysate Antigens

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