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Integrated colloidal quantum dot photodetectors with color-tunable plasmonic nanofocusing lenses

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Light(Science & Applications) 2015年第1期4卷 538-544页

作者： Silke L Diedenhofen dominik Kufer Tania Lasanta Gerasimos Konstantatos ICFO-Institut de Ciencies Fotoniques Barcelona 08860Spain

High-sensitivity photodetection is at the heart of many optoelectronic applications,including spectroscopy,imaging,surveillance,remote sensing and medical *** the highest possible sensitivity for a given photodetector technology requires the development of ultra-small-footprint detectors,as the noise sources scale with the area of the *** must be accomplished while sacrificing neither the optically active area of the detector nor its ***,such designs are based on diffraction-limited approaches using optical ***,we employ a plasmonic flat-lens bull’s eye structure(BES)to concentrate and focus light into a nanoscale colloidal quantum dot(CQD)*** plasmonic lenses function as nanofocusing resonant structures that simultaneously offer color selectivity and enhanced ***,we demonstrate the first CQD photodetector with a nanoscale footprint,the optically active area of which is determined by the BES;this detector represents an exciting opportunity for high-sensitivity sensing.

关键词： PbS quantum dots photodetectors plasmonic bull’s eye structures plasmonic lens

CFD–DEM simulation of fine particles in a spouted bed apparatus with a Wurster tube

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Particuology 2019年第1期17卷 114-125页

作者： Paul Breuninger dominik Weis Isabell Behrendt Philipp Grohn Fabian Krull Sergiy Antonyuk Institute of Particle Process Engineering University of KaiserslauternGottlieb Daimler Str.. KaiserslauternGermany

In this work, a coupled computational fluid dynamics–discrete element method (CFD–DEM) approach was employed to evaluate the spouting behavior of fine, cohesive powders in a cylindrical spouted bed with a conical base and equipped with a Wurster tube. The particle and gas dynamics inside the apparatus were simulated with 1.7 million spherical ZrO2 particles with a particle size of 100 μm. For an accurate prediction of the interactions of cohesive particles in the spouted bed, the adhesion forces according to JKR theory were included in the Hertz–Tsuji contact model. The surface energy of the particles was varied over a wide range to determine the effect of the adhesion on the spouting (the fountain shape and maximum height as well as the distribution of the concentrations and velocities of particles in different zones of the apparatus). A detailed analysis of the collision dynamics was conducted. The spouting behavior of a spouted bed with the same dimensions, particles, and processing parameters was recorded with a high-speed camera. The CFD–DEM simulations showed good agreement with the experimentally captured spouting behavior.

关键词： CFD–DEM Spouted bed Wurster tube Cohesive powder

The Impact of a Bicuspid Aortic Valve on Aortic Geometry and Function in Patients with Aortic Coarctation:A Comprehensive CMR Study

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Congenital Heart Disease 2021年第6期16卷 551-560页

作者： Laura Schweikert dominik Gabbert Sylvia Krupickova Inga Voges Department of Congenital Heart Disease and Paediatric Cardiology University Hospital Schleswig-HolsteinKielGermany Royal Brompton Hospital LondonUK

Background:An isolated bicuspid aortic valve(BAV)is associated with structural and functional abnormalities of the aorta and the left ventricle(LV).Although~50%of patients with aortic coarctation(CoA)have a BAV,less is known about its impact on LV function and aortic geometry and function in CoA *** this cardiovascular magnetic resonance imaging(CMR)study,we analysed markers of LV and aortic function as well as aortic geometry in a large cohort of CoA patients with a BAVand compared them with CoA patients with a tricuspid aortic valve(TAV).Methods:We included 48 patients with a BAV(18.4±9.3 years)and 45 patients with TAV(20.7±9.9 years).LV volumes,mass and ejection fraction as well as aortic distensibilty,pulse wave velocity(PWV)were measured from standard cine CMR and phase-contrast CMR images.2-dimensional CMR feature tracking(2DCMR-FT)was performed to measure longitudinal,circumferential and radial strain and strain rate of the *** arch geometry was classified as romanic,gothic and ***:LV volumes,mass and ejection fraction as well as aortic distensibility and PWV did not significantly differ between the BAV and the TAV *** was also no significant difference for LV global longitudinal,radial and circumferential strain and strain rate between both *** with a BAV had more commonly a gothic aortic arch compared to TAV patients,but this difference was not statistically significant(22 vs.14,p=0.2).Ascending and descending aortic distensibility correlated with LV mass in the entire patient group(p<0.001).Global longitudinal,circumferential and radial strain(GLS,GCS,GRS)and global longitudinal and circumferential strain rate(GLSR,GCSR)correlated with LV ejection fraction(p<0.001).Conclusion:Our data suggest that the presence of a BAV does not adversely impact LV and aortic function in children and young adults with *** correlation of global circumferential,longitudinal and radial strain values with LV ejection fraction dem

关键词： Aortic coarctation bicuspid aortic valve cardiovascular magnetic resonance feature tracking

Transient leaf endophytes are the most active fungi in 1-year-old beech leaf litter

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Fungal Diversity 2018年第2期89卷 237-251页

作者： Marco Alexandre Guerreiro Andreas Brachmann dominik Begerow Derek Persoh AG Geobotany Faculty of Biology and BiotechnologyRuhrUniversitat BochumUniversitatsstraße 15044801 BochumGermany Faculty of Biology GeneticsLudwig-MaximiliansUniversity MunichGroßhaderner Straße 2-482152 Planegg-MartinsriedGermany

The ecological significance of fungi occurring asymptomatically inside living plant leaves is poorly *** the broad saprotrophic potential of many endophytic fungi,we hypothesized that they persist in decaying litter for an extended period of time after leaf *** assemblages were assessed by highthroughput sequencing in autumn leaves of beech(Fagus sylvatica)and in the corresponding leaf litter in 388 samples from 22 beech forest plots in three widely distant regions of Germany.A considerable proportion of the leafendophytic fungi was also found in 1-year-old ***occurrence networks revealed that the fungi formed unstructured assemblages inside the living leaves,rather than well-structured *** endophytic fungi constituted an integral part of the fungal litter community and were by far the most active fungi in 1-year-old *** therefore consider these endophytic occurrences to represent transient *** of the aboveground microbiome appears therefore to be closely connected to the process of litter *** the respective linked fungal habitat will facilitate predicting nutrient and carbon cycling and storage in forest ecosystems as well as elucidating the ecology of leaf microbiomes.

关键词： Endophytic fungi Litter fungi Plant microbiome Co-occurrence networks Litter decomposition Community assembly

Romanian legal management rules limit wood production in Norway spruce and beech forests

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Forest Ecosystems 2017年第1期4卷 1-11页

作者： Olivier Bouriaud Gheorghe Marin Laura Bouriaud dominik Hessenmoller Ernst-Detlef Schulze National Forest Inventory National Research and Development Institute for Forestry INCDS Eroilor Bd. 128 Voluntari Romania University Stefan cel Mare Suceava RomaniaUniversitatii str.13Suceava 720229Romania. Department of Biogeochemical Processes Max Planck Institute for BiogeochemistryHans-Knoell-Str.10Jena 07745Germany

Background： The quantitative impact of forest management on forests＇ wood resource was evaluated for Picea and Fagus mixed forests. The effects on the productivity of tendering operations, thinnings and rotation length have seldom been directly quantified on landscape scale. Methods： Two sites of similar fertility but subject to contrasted forest management were studied with detailed inventories： one in Germany, the other in Romania, and compared with the respective national forest inventories. In Romania, regulations impose very long rotations, low thinnings and a period of no-cut before harvest. In contrast, tending and thinnings are frequent and intense in Germany. Harvests start much earlier and must avoid clear cutting but maintain a permanent forest cover with natural regeneration. While Germany has an average annual wood increment representative for Central Europe, Romania represents the average for Eastern Europe. Results： The lack of tending and thinning in the Romanian site resulted in twice as many trees per hectare as in the German site for the same age. The productivity in Romanian production forests was 20 % lower than in Germany despite a similar fertility. The results were supported by the data from the national forest inventory of each country, which confirmed that the same differential exists at country scale. Furthermore, provided the difference in rotation length, two crops are harvested in Germany when only one is harvested in Romania. The losses of production due to a lower level of management in Romania where estimated to reach 12.8 million m3.y-1 in regular mountain production forests, and to 15 million m3.y-1 if managed protection forest is included. Conclusions： The productivity of Picea and Fagus mountain forests in Romania is severely depressed by the lack of tending and thinning, by overly long rotations and the existence of a 25-years no-cut period prior to harvest. The average standing volume in Germany was 50 % lower than in Romania,

关键词： Forest management Forest productivity Legal rules Sylviculture Forest Operations Wood resource

2D-layered Sn/Ge anodes for lithium-ion batteries with high capacity and ultra-fast Li ion diffusivity

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Journal of Energy Chemistry 2020年第8期29卷 160-165,I0006页

作者： Xiyu Cao Yanchen Fan Jiale Qu Tianshuai Wang dominik Legut Qianfan Zhang School of Materials Science and Engineering Beihang UniversityBeijing 100191China IT4Innovations.VSB-Technical University of Ostrava CZ-70800 Ostrava-PorubaCzechia Nanotechnology Centre VSB-Technical University of OstravaCZ-70800 Ostrava-PorubaCzechia

As a new type of green energy, lithium-ion battery(LIB) has been widely used in various electric portable devices because of its high-voltage, large specific capacity, long cycle life and environmental friendliness [1,2]. However, today’s anode materials of commercial LIBs cannot meet the further development requirements of smart devices and electric car due to the limitations of the electrode capacity(e.g. 372 mAh g-1 for graphite).

关键词： 2D-layered material Stanene Germanene Lithium-ion battery Lithium diffusion

Catheter-based renal denervation： treating hypertension or beyond？

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Chinese Medical Journal 2014年第6期127卷 1166-1169页

作者： Felix Mahfoud dominik Linz Michael B(o)hm Department of Internal Medicine Saarland University Homburg 66421 Germany

The sympathetic nervous system regulates cardiac output,blood pressure(BP)and volume,electrolyte balance,and the composition of body *** afferent nervous signals to the brain are regulated by mechano-sensitive

关键词： renal sympathetic denervation hypertension sympathetic nervous system

Landslide Reliability Analysis Based on Transfer Coefficient Method: A Case Study from Three Gorges Reservoir

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Journal of Earth Science 2012年第2期23卷 187-198页

作者：毕仁能 dominik Ehret 项伟 Joachim Rohn Markus Schleier 江洎洧 Three Gorges Research Center for Geo-hazard Ministry of EducationChina University of Geosciences Department of Applied Geology University of Erlangen-Nuremberg State Office for Geology Resources and Mining of Baden-WürttembergFreiburg i.Br.Germany Faculty of Engineering China University of Geosciences

To evaluate the reliability of a landslide in a reservoir, the universal transfer coefficient method, which is popularized by the Chinese standard, is adopted as performance function in this study for：（1） common deterministic method stability evaluation; （2） reliability evaluation based on a Monte Carlo method; （3） comparison of landslide reliability under different water levels and under different correlation coefficients between soil shear strength parameters （c, Φ）, respectively with mean, standard deviation, reliability coefficient and failure probability. This article uses the Bazimen （八字门） landslide, which is located at the outlet of Xiangxi （香溪） River in the Three Gorges Reservoir, as an example to evaluate its stability and reliability under different water levels with two-dimensional deterministic and probabilistic methods. With the assumption that constant mean and normal distributed shear strength parameters （c, Φ）, correlation coefficient c, Φ=-1 based reliability analysis, compared with c, Φ=0 and 1, indicates obviously more increase of reliability index and lower standard deviation as water levels rise. To the case of a certain water level, c, Φ=-1 does not have constantly positive or negative effects on landslide reliability compared with c, Φ=0 or 1, but is associated with water level. Whereas the safety factor Fs by deterministic method, which is almost the same value as corresponding mean of safety factor from probabilistic analysis, will increase slightly as water level increases.

关键词： transfer coefficient method,Monte Carlo method water level fluctuation landslide stability reliability Three Gorges Reservoir.

The impact of salps(Salpa thompsoni)on the Antarctic krill population(Euphausia superba):an individual-based modelling study

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Ecological Processes 2023年第1期12卷 680-695页

作者： Bruno Walter Pietzsch Aaron Schmidt Jürgen Groeneveld dominik Bahlburg Bettina Meyer Uta Berger Faculty of Environmental Sciences Institute of Forest Growth and Forest Computer SciencesTechnische Universität Dresden01062 DresdenGermany Department of Ecological Modelling Helmholtz Centre for Environmental Research-UFZLeipzigGermany Section Polar Biological Oceanography Alfred Wegener Institute Helmholtz Centre for Polar and Marine ResearchBremerhavenGermany Institute for Chemistry and Biology of the Marine Environment(ICBM) Carl-Von-Ossietzky UniversityOldenburgGermany Helmholtz Institute for Marine Functional Biodiversity(HIFMB) OldenburgGermany

Background Krill(Euphausia superba)and salps(Salpa thompsoni)are key macrozooplankton grazers in the Southern Ocean ***,due to differing habitat requirements,both species previously exhibited little spatial *** ongoing climate change-induced seawater temperature increase and regional sea ice loss,salps can now extend their spatial distribution into historically krill-dominated areas and increase rapidly due to asexual reproduction when environmental conditions are *** the potential effects on krill is crucial,since krill is a species of exceptional trophic significance in the Southern Ocean food *** impacts on krill could trigger cascading effects on its predators and *** address this question,we combined two individual-based models on salps and krill,which describe the whole life cycle of salp individuals and the dynamic energy budget of individual *** resulting new model PEKRIS(PErformance of KRIll ***)simulates a krill population for 100 years under varying chlorophyll-a concentrations in the presence or absence of *** All of the investigated krill population properties(abundance,mean length,and yearly egg production)were significantly impacted by the presence of *** the other hand,salp density was not impacted if krill were *** medians of krill population properties deviated during variable maximum chlorophyll-a density per year when salps were introduced by−99.9%(−234 individuals per 1000 m3)for krill density,−100%(−22,062 eggs per 1000 m3)for krill eggs and−0.9%(−0.3 mm)for mean length of *** If both species compete for the same food resource in a closed space,salps seem to inhibit krill *** simulation studies should investigate whether this effect prevails if different phytoplankton sizes and consumption preferences of krill are ***,direct predation of the two species or consumption of krill fecal pellets by salps could c

关键词： Euphausia superba Salpa thompsoni Individual-based model Food competition Population dynamics DEB theory