Jens Schneider

Technical University of Darmstadt

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Michael Drass

Technical University of Darmstadt

Johann‐Dietrich Wörner

European Space Agency

Johannes Kuntsche

Darmstadt University of Applied Sciences

Christian Louter

Delft University of Technology

Jens Henrik Nielsen

Technical University of Denmark

Sebastian Schula

GS Engineering (United States)

Jan Belis

Ghent University

Stefan Kolling

Technische Hochschule Mittelhessen

Mauro Overend

Delft University of Technology

Miriam Schuster

Technical University of Darmstadt

Cooperative Institutions

Technical University of Darmstadt

167

Robert Bosch (Germany)

137

Real Sociedad Española de Química

136

Real Academia Española

110

Weatherford College

105

John Wiley & Sons (Germany)

Society for Chemical Engineering and Biotechnology

RWTH Aachen University

John Wiley & Sons (United States)

Technical University of Munich

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Three years of routine Raman lidar measurements of tropospheric aerosols: Planetary boundary layer heights, extinction and backscatter coefficients

Jens Schneider Ronald Eixmann

Abstract. We have performed a three-year series of routine lidar measurements on a climatological base. To obtain an unbiased data set, the measurements were taken at preselected times. The measurements were performed between 1 December 1997, and 30 November 2000, at Kühlungsborn, Germany (54°07' N, 11°46' E). Using a Rayleigh/Mie/Raman lidar system, we measured the aerosol backscatter coefficients at three wavelengths in and above the planetary boundary layer. The aerosol extinction coefficient has been determined at 532 nm, but here the majority of the measurements has been restricted to heights above the boundary layer. Only after-sunset measurements are included in this data set since the Raman measurements were restricted to darkness. For the climatological analysis, we selected the cloud-free days out of a fixed measurement schedule. The annual cycle of the boundary layer height has been found to have a phase shift of about 25 days with respect to the summer/winter solstices. The mean values of the extinction and backscatter coefficients do not show significant annual differences. The backscatter coefficients in the planetary boundary layer were found to be about 10 times higher than above. The mean aerosol optical depth above the boundary layer and below 5 km is 0.26 (±1.0) x 10-2 in summer, and 1.5 (±0.95) x 10-2 in winter, which almost negligible compared to values measured in the boundary layer. A cluster analysis of the backward trajectories yielded two major directions of air mass origin above the planetary boundary layer and 4 major directions inside. A marked difference between the total aerosol load dependent on the air mass origin could be found for air masses originating from the west and travelling at high wind speeds. Comparing the measured spectral dependence of the backscatter coefficients with data from the Global Aerosol Data Set, we found a general agreement, but only a few conclusions with respect to the aerosol type could be draws due to the high variability of the measured backscatter coefficients.

Backscatter (email)

Extinction (optical mineralogy)

Sun photometer

10.5194/acpd-2-75-2002

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Viscoelastic properties of laminated glass interlayers – theory and experiments

Johannes Kuntsche Jens Schneider Miriam Schuster Sebastian Langer

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Citations (9)

DIN 18008 Glas im Bauwesen – Bemessungs- und Konstruktionsregeln, Erläuterungen und Anwendung.

Jens Schneider

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Citations (1)

Progress in the Growth and Performances of Rad Silicon Sheets

Photovoltaic Solar Energy Conference (1981)

C. Belouet C. Belin Jens Schneider João Vitor Paulin

This article reports on the growth of polysilicon sheets up to 6 m in length by the RAD process using carbon substrates coated by rough laminar pyrocarbon in a continuous deposition process. It is shown that smooth layers exhibiting a minority-carrier diffusion length of around 60 μ,m can be achieved at pulling rates up to 10 cm/mn. New substrate bases are described and RAD solar cells (A.R. coated) made from the first continuous ribbons grown so far can exhibit AM1 conversion efficiencies above 9 %.

Carbon fibers

Deposition

10.1007/978-94-009-8423-3_83

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Citations (2)

Pseudo-elastic cavitation model—part II: extension to cyclic behavior of transparent silicone adhesives

Glass Structures & Engineering (2019)

Michael Drass N. Bartels Jens Schneider Dominik K. Klein

Isochoric process

Hysteresis

Hydrostatic stress

Hydrostatic equilibrium

Shrinkage

Elasticity

10.1007/s40940-019-00103-8

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Citations (15)

A polymer based and template-directed approach towards functional multidimensional micro-structured organic/inorganic hybrid materials

Journal of Materials Chemistry C (2014)

Christian Schäfer Steffen Vowinkel G. P. Hellmann Tim Herdt C. Contiu

The control over structure and function in hierarchically multidimensional materials based on hollow spheres, nanowires, nanorods, nanotubes, fibres, membranes or inverse opals with adjustable dimensions has gained considerable attention due to their tremendous potential for a wide variety of applications. Herein we describe convenient and efficient synthetic concepts for synthesis and processing of well-defined polymer-templated inorganic materials with 0D, 1D, 2D and 3D nano- and microstructures. In the first step, we describe universal methodologies for the controlled build-up of polymer-templated non-functional inorganic structures by taking advantage of lower dimensional structures such as core–shell particles or fibres. With this approach it is possible to obtain more sophisticated architectures such as 3D ordered macroporous (3DOM) materials after applying different procedures for organization, e.g. the powerful melt shear technique as well as novel double-templating strategies towards multidimensional carbon architectures. To prove the feasibility of our protocols established herein we have exemplarily applied these methods to the formation of functional inorganic high-temperature materials, such as silicon carbide (β-SiC) and yttria-stabilized zirconia (YSZ). The general pathways for the controlled build-up of nano- and micro-scaled structures based on polymer templates may thus provide a facile and versatile route to an even wider variety of organic/inorganic composite materials offering a wider range of future applications in the fields of catalysis, separation, sensors, optics, and biomedicine. Herein we show first examples of selected new material morphologies towards energy related issues, namely Li-ion battery applications and heterogeneous catalysis (selective ethanol oxidation).

Template

Nanorod

Hybrid material

10.1039/c4tc00633j

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Citations (38)

Recent initiatives to enhance cooperation in structural glass research and education in Europe

Jan Belis Christian Louter Jens Schneider Jürgen Neugebauer

Keywords: structural glass ; COST ; COST Action TU0905 ; cooperation in science and technology ; European research Reference EPFL-CONF-200279 Record created on 2014-07-17, modified on 2016-08-09

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Szkło kontra materiały wybuchowe

Świat Szkła (2013)

Jens Schneider Johannes Kuntsche

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Louis the Pious on the Road

HAL (Le Centre pour la Communication Scientifique Directe) (2010)

Jens Schneider