TY  - JOUR
A1  - Kalk, Wolf-Dieter
A1  - Prystav, Werner
A1  - Hülsbergen, Kurt-Jürgen
A1  - Biermann, Steffen
T1  - Nährstoffbilanzen in brandenburgischen Landwirtschaftsbetrieben
JF  - Brandenburgische Umwelt-Berichte : BUB ; Schriftenreihe der Mathematisch-Naturwissenschaftlichen Fakultät der Universität Potsdam
Y1  - 2000
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:517-opus-3519
SN  - 1434-2375
SN  - 1611-9339
VL  - 9
SP  - 25
EP  - 32
ER  - 
TY  - JOUR
A1  - Hetenyi, Gyorgy
A1  - Molinari, Irene
A1  - Clinton, John
A1  - Bokelmann, Gotz
A1  - Bondar, Istvan
A1  - Crawford, Wayne C.
A1  - Dessa, Jean-Xavier
A1  - Doubre, Cecile
A1  - Friederich, Wolfgang
A1  - Fuchs, Florian
A1  - Giardini, Domenico
A1  - Graczer, Zoltan
A1  - Handy, Mark R.
A1  - Herak, Marijan
A1  - Jia, Yan
A1  - Kissling, Edi
A1  - Kopp, Heidrun
A1  - Korn, Michael
A1  - Margheriti, Lucia
A1  - Meier, Thomas
A1  - Mucciarelli, Marco
A1  - Paul, Anne
A1  - Pesaresi, Damiano
A1  - Piromallo, Claudia
A1  - Plenefisch, Thomas
A1  - Plomerova, Jaroslava
A1  - Ritter, Joachim
A1  - Rumpker, Georg
A1  - Sipka, Vesna
A1  - Spallarossa, Daniele
A1  - Thomas, Christine
A1  - Tilmann, Frederik
A1  - Wassermann, Joachim
A1  - Weber, Michael
A1  - Weber, Zoltan
A1  - Wesztergom, Viktor
A1  - Zivcic, Mladen
A1  - Abreu, Rafael
A1  - Allegretti, Ivo
A1  - Apoloner, Maria-Theresia
A1  - Aubert, Coralie
A1  - Besancon, Simon
A1  - de Berc, Maxime Bes
A1  - Brunel, Didier
A1  - Capello, Marco
A1  - Carman, Martina
A1  - Cavaliere, Adriano
A1  - Cheze, Jerome
A1  - Chiarabba, Claudio
A1  - Cougoulat, Glenn
A1  - Cristiano, Luigia
A1  - Czifra, Tibor
A1  - Danesi, Stefania
A1  - Daniel, Romuald
A1  - Dannowski, Anke
A1  - Dasovic, Iva
A1  - Deschamps, Anne
A1  - Egdorf, Sven
A1  - Fiket, Tomislav
A1  - Fischer, Kasper
A1  - Funke, Sigward
A1  - Govoni, Aladino
A1  - Groschl, Gidera
A1  - Heimers, Stefan
A1  - Heit, Ben
A1  - Herak, Davorka
A1  - Huber, Johann
A1  - Jaric, Dejan
A1  - Jedlicka, Petr
A1  - Jund, Helene
A1  - Klingen, Stefan
A1  - Klotz, Bernhard
A1  - Kolinsky, Petr
A1  - Kotek, Josef
A1  - Kuhne, Lothar
A1  - Kuk, Kreso
A1  - Lange, Dietrich
A1  - Loos, Jurgen
A1  - Lovati, Sara
A1  - Malengros, Deny
A1  - Maron, Christophe
A1  - Martin, Xavier
A1  - Massa, Marco
A1  - Mazzarini, Francesco
A1  - Metral, Laurent
A1  - Moretti, Milena
A1  - Munzarova, Helena
A1  - Nardi, Anna
A1  - Pahor, Jurij
A1  - Pequegnat, Catherine
A1  - Petersen, Florian
A1  - Piccinini, Davide
A1  - Pondrelli, Silvia
A1  - Prevolnik, Snjezan
A1  - Racine, Roman
A1  - Regnier, Marc
A1  - Reiss, Miriam
A1  - Salimbeni, Simone
A1  - Santulin, Marco
A1  - Scherer, Werner
A1  - Schippkus, Sven
A1  - Schulte-Kortnack, Detlef
A1  - Solarino, Stefano
A1  - Spieker, Kathrin
A1  - Stipcevic, Josip
A1  - Strollo, Angelo
A1  - Sule, Balint
A1  - Szanyi, Gyongyver
A1  - Szucs, Eszter
A1  - Thorwart, Martin
A1  - Ueding, Stefan
A1  - Vallocchia, Massimiliano
A1  - Vecsey, Ludek
A1  - Voigt, Rene
A1  - Weidle, Christian
A1  - Weyland, Gauthier
A1  - Wiemer, Stefan
A1  - Wolf, Felix
A1  - Wolyniec, David
A1  - Zieke, Thomas
T1  - The AlpArray seismic network
BT  - a large-scale european experiment to image the alpine orogen
JF  - Surveys in Geophysics
N2  - The AlpArray programme is a multinational, European consortium to advance our understanding of orogenesis and its relationship to mantle dynamics, plate reorganizations, surface processes and seismic hazard in the Alps-Apennines-Carpathians-Dinarides orogenic system. The AlpArray Seismic Network has been deployed with contributions from 36 institutions from 11 countries to map physical properties of the lithosphere and asthenosphere in 3D and thus to obtain new, high-resolution geophysical images of structures from the surface down to the base of the mantle transition zone. With over 600 broadband stations operated for 2 years, this seismic experiment is one of the largest simultaneously operated seismological networks in the academic domain, employing hexagonal coverage with station spacing at less than 52 km. This dense and regularly spaced experiment is made possible by the coordinated coeval deployment of temporary stations from numerous national pools, including ocean-bottom seismometers, which were funded by different national agencies. They combine with permanent networks, which also required the cooperation of many different operators. Together these stations ultimately fill coverage gaps. Following a short overview of previous large-scale seismological experiments in the Alpine region, we here present the goals, construction, deployment, characteristics and data management of the AlpArray Seismic Network, which will provide data that is expected to be unprecedented in quality to image the complex Alpine mountains at depth.
KW  - Seismology
KW  - Alps
KW  - Seismic network
KW  - Geodynamics
KW  - Seismic imaging
KW  - Mountain building
Y1  - 2018
U6  - https://doi.org/10.1007/s10712-018-9472-4
SN  - 0169-3298
SN  - 1573-0956
VL  - 39
IS  - 5
SP  - 1009
EP  - 1033
PB  - Springer
CY  - Dordrecht
ER  - 
TY  - BOOK
A1  - Malberg, Hagen
A1  - Sander-Thömmes, Tilmann
A1  - Wessel, Niels
A1  - Wolf, Werner
T1  - Biosingnalverarbeitung : Innovation bei der Erfassung und Analyse bioelektronischer und biomagnetischer Signale ; Universität Potsdam, 16.-18.07.1000 ; Tagungsband
Y1  - 2008
SN  - 978-3-9810021-7-1
PB  - Physikalische technische Bundesanst.
CY  - Potsdam
ER  - 
TY  - JOUR
A1  - Reindl, Nicole
A1  - Rauch, Thomas
A1  - Parthasarathy, M.
A1  - Werner, K.
A1  - Kruk, J. W.
A1  - Hamann, Wolf-Rainer
A1  - Sander, Andreas Alexander Christoph
A1  - Todt, Helge Tobias
T1  - The rapid evolution of the exciting star of the Stingray nebula
JF  - Astronomy and astrophysics : an international weekly journal
N2  - Context. SAO 244567, the exciting star of the Stingray nebula, is rapidly evolving. Previous analyses suggested that it has heated up from an effective temperature of about 21 kK in 1971 to over 50 kK in the 1990s. Canonical post-asymptotic giant branch evolution suggests a relatively high mass while previous analyses indicate a low-mass star.
 Aims. A comprehensive model-atmosphere analysis of UV and optical spectra taken during 1988-2006 should reveal the detailed temporal evolution of its atmospheric parameters and provide explanations for the unusually fast evolution.
 Methods. Fitting line profiles from static and expanding non-LTE model atmospheres to the observed spectra allowed us to study the temporal change of effective temperature, surface gravity, mass-loss rate, and terminal wind velocity. In addition, we determined the chemical composition of the atmosphere.
 Results. We find that the central star has steadily increased its effective temperature from 38 kK in 1988 to a peak value of 60 kK in 2002. During the same time, the star was contracting, as concluded from an increase in surface gravity from log g = 4.8 to 6.0 and a drop in luminosity. Simultaneously, the mass-loss rate declined from log(M/M-circle dot yr(-1)) = -9.0 to -11.6 and the terminal wind velocity increased from v(infinity) = 1800 km s(-1) to 2800 km s(-1). Since around 2002, the star stopped heating and has cooled down again to 55 kK by 2006. It has a largely solar surface composition with the exception of slightly subsolar carbon, phosphorus, and sulfur. The results are discussed by considering different evolutionary scenarios.
 Conclusions. The position of SAO 244567 in the log T-eff-log g plane places the star in the region of sdO stars. By comparison with stellar-evolution calculations, we confirm that SAO 244567 must be a low-mass star (M < 0.55 M-circle dot). However, the slow evolution of the respective stellar evolutionary models is in strong contrast to the observed fast evolution and the young planetary nebula with a kinematical age of only about 1000 years. We speculate that the star could be a late He-shell flash object. Alternatively, it could be the outcome of close-binary evolution. Then SAD 244567 would be a low-mass (0.354 M-circle dot) helium pre-white dwarf after the common-envelope phase, during which the planetary nebula was ejected.
KW  - stars: abundances
KW  - stars: evolution
KW  - stars: AGB and post-AGB
KW  - stars: individual: SAO 244567
KW  - stars: fundamental parameters
KW  - planetary nebulae: individual: Stingray nebula (Henize 3-1357)
Y1  - 2014
U6  - https://doi.org/10.1051/0004-6361/201323189
SN  - 0004-6361
SN  - 1432-0746
VL  - 565
PB  - EDP Sciences
CY  - Les Ulis
ER  - 
TY  - JOUR
A1  - Pablo, Herbert
A1  - Richardson, Noel D.
A1  - Moffat, Anthony F. J.
A1  - Corcoran, Michael
A1  - Shenar, Tomer
A1  - Benvenuto, Omar
A1  - Fuller, Jim
A1  - Naze, Yael
A1  - Hoffman, Jennifer L.
A1  - Miroshnichenko, Anatoly
A1  - Apellaniz, Jesus Maiz
A1  - Evans, Nancy
A1  - Eversberg, Thomas
A1  - Gayley, Ken
A1  - Gull, Ted
A1  - Hamaguchi, Kenji
A1  - Hamann, Wolf-Rainer
A1  - Henrichs, Huib
A1  - Hole, Tabetha
A1  - Ignace, Richard
A1  - Iping, Rosina
A1  - Lauer, Jennifer
A1  - Leutenegger, Maurice
A1  - Lomax, Jamie
A1  - Nichols, Joy
A1  - Oskinova, Lida
A1  - Owocki, Stan
A1  - Pollock, Andy
A1  - Russell, Christopher M. P.
A1  - Waldron, Wayne
A1  - Buil, Christian
A1  - Garrel, Thierry
A1  - Graham, Keith
A1  - Heathcote, Bernard
A1  - Lemoult, Thierry
A1  - Li, Dong
A1  - Mauclaire, Benjamin
A1  - Potter, Mike
A1  - Ribeiro, Jose
A1  - Matthews, Jaymie
A1  - Cameron, Chris
A1  - Guenther, David
A1  - Kuschnig, Rainer
A1  - Rowe, Jason
A1  - Rucinski, Slavek
A1  - Sasselov, Dimitar
A1  - Weiss, Werner
T1  - A coordinated X-Ray and optical campaign of the nearest massive eclipsing binary, delta ORIONIS Aa. III. Analysis of optical photometric (most) and spectroscopic (ground based) variations
JF  - The astrophysical journal : an international review of spectroscopy and astronomical physics
N2  - We report on both high-precision photometry from the Microvariability and Oscillations of Stars (MOST) space telescope and ground-based spectroscopy of the triple system delta Ori A, consisting of a binary O9.5II+early-B (Aa1 and Aa2) with P = 5.7 days, and a more distant tertiary (O9 IV P > 400 years). This data was collected in concert with X-ray spectroscopy from the Chandra X-ray Observatory. Thanks to continuous coverage for three weeks, the MOST light curve reveals clear eclipses between Aa1 and Aa2 for the first time in non-phased data. From the spectroscopy, we have a well-constrained radial velocity (RV) curve of Aa1. While we are unable to recover RV variations of the secondary star, we are able to constrain several fundamental parameters of this system and determine an approximate mass of the primary using apsidal motion. We also detected second order modulations at 12 separate frequencies with spacings indicative of tidally influenced oscillations. These spacings have never been seen in a massive binary, making this system one of only a handful of such binaries that show evidence for tidally induced pulsations.
KW  - binaries: close
KW  - binaries: eclipsing
KW  - stars: early-type
KW  - stars: individual (delta Ori A)
KW  - stars: mass-loss
KW  - stars: variables: general
Y1  - 2015
U6  - https://doi.org/10.1088/0004-637X/809/2/134
SN  - 0004-637X
SN  - 1538-4357
VL  - 809
IS  - 2
PB  - IOP Publ. Ltd.
CY  - Bristol
ER  - 
TY  - JOUR
A1  - Gerhard, Reimund
A1  - Bauer, Siegfried
A1  - Bauer-Gogonea, Simona
A1  - Brinker, Walter
A1  - Dinger, Claudia
A1  - Molzow, Wolf-Dietrich
A1  - Wirges, Werner
A1  - Yilmaz, Sükrü
T1  - Electro-optical investigation of the dipole orientation in poled polymers
Y1  - 1995
ER  - 
TY  - JOUR
A1  - Brinker, Walter
A1  - Wirges, Werner
A1  - Molzow, Wolf-Dietrich
A1  - Gerhard, Reimund
A1  - Melcher, R.
A1  - Budde, W.
A1  - Fiedler, H.
T1  - Active silicon CMOS addressing matrices for light-valve projection displays
Y1  - 1995
ER  - 
TY  - JOUR
A1  - Kamjunke, Norbert
A1  - Beckers, Liza-Marie
A1  - Herzsprung, Peter
A1  - von Tümpling, Wolf
A1  - Lechtenfeld, Oliver
A1  - Tittel, Jörg
A1  - Risse-Buhl, Ute
A1  - Rode, Michael
A1  - Wachholz, Alexander
A1  - Kallies, Rene
A1  - Schulze, Tobias
A1  - Krauss, Martin
A1  - Brack, Werner
A1  - Comero, Sara
A1  - Gawlik, Bernd Manfred
A1  - Skejo, Hello
A1  - Tavazzi, Simona
A1  - Mariani, Giulio
A1  - Borchardt, Dietrich
A1  - Weitere, Markus
T1  - Lagrangian profiles of riverine autotrophy, organic matter transformation, and micropollutants at extreme drought
JF  - The science of the total environment : an international journal for scientific research into the environment and its relationship with man
N2  - On their way from inland to the ocean, flowing water bodies, their constituents and their biotic communities are ex-posed to complex transport and transformation processes. However, detailed process knowledge as revealed by La-grangian measurements adjusted to travel time is rare in large rivers, in particular at hydrological extremes. To fill this gap, we investigated autotrophic processes, heterotrophic carbon utilization, and micropollutant concentrations applying a Lagrangian sampling design in a 600 km section of the River Elbe (Germany) at historically low discharge. Under base flow conditions, we expect the maximum intensity of instream processes and of point source impacts. Phy-toplankton biomass and photosynthesis increased from upstream to downstream sites but maximum chlorophyll con-centration was lower than at mean discharge. Concentrations of dissolved macronutrients decreased to almost complete phosphate depletion and low nitrate values. The longitudinal increase of bacterial abundance and production was less pronounced than in wetter years and bacterial community composition changed downstream. Molecular analyses revealed a longitudinal increase of many DOM components due to microbial production, whereas saturated lipid-like DOM, unsaturated aromatics and polyphenols, and some CHOS surfactants declined. In decomposition exper-iments, DOM components with high O/C ratios and high masses decreased whereas those with low O/C ratios, low masses, and high nitrogen content increased at all sites. Radiocarbon age analyses showed that DOC was relatively old (890-1870 years B.P.), whereas the mineralized fraction was much younger suggesting predominant oxidation of algal lysis products and exudates particularly at downstream sites. Micropollutants determining toxicity for algae (terbuthylazine, terbutryn, isoproturon and lenacil), hexachlorocyclohexanes and DDTs showed higher concentrations from the middle towards the downstream part but calculated toxicity was not negatively correlated to phytoplankton. Overall, autotrophic and heterotrophic process rates and micropollutant concentrations increased from up-to down-stream reaches, but their magnitudes were not distinctly different to conditions at medium discharges.
KW  - Phytoplankton
KW  - Nutrients
KW  - Dissolved organic matter (DOM)
KW  - bacteria
KW  - Respiration
KW  - Micropollutants
Y1  - 2022
U6  - https://doi.org/10.1016/j.scitotenv.2022.154243
SN  - 0048-9697
SN  - 1879-1026
VL  - 828
PB  - Elsevier
CY  - Amsterdam
ER  - 
TY  - GEN
A1  - Maier, Philipp
A1  - Wolf, Jürgen
A1  - Keilig, Thomas
A1  - Krabbe, Alfred
A1  - Duffard, Rene
A1  - Ortiz, Jose-Luis
A1  - Klinkner, Sabine
A1  - Lengowski, Michael
A1  - Müller, Thomas
A1  - Lockowandt, Christian
A1  - Krockstedt, Christian
A1  - Kappelmann, Norbert
A1  - Stelzer, Beate
A1  - Werner, Klaus
A1  - Geier, Stephan
A1  - Kalkuhl, Christoph
A1  - Rauch, Thomas
A1  - Schanz, Thomas
A1  - Barnstedt, Jürgen
A1  - Conti, Lauro
A1  - Hanke, Lars
T1  - Towards a European Stratospheric Balloon Observatory
BT  - the ESBO design study
T2  - Ground-based and Airborne Telescopes VII
N2  - This paper presents the concept of a community-accessible stratospheric balloon-based observatory that is currently under preparation by a consortium of European research institutes and industry. We present the technical motivation, science case, instrumentation, and a two-stage image stabilization approach of the 0.5-m UV/visible platform. In addition, we briefly describe the novel mid-sized stabilized balloon gondola under design to carry telescopes in the 0.5 to 0.6 m range as well as the currently considered flight option for this platform. Secondly, we outline the scientific and technical motivation for a large balloon-based FIR telescope and the ESBO DS approach towards such an infrastructure.
KW  - astronomy
KW  - balloon telescopes
KW  - UV
KW  - far infrared
KW  - detectors
KW  - observatory
Y1  - 2018
SN  - 978-1-5106-1954-8
U6  - https://doi.org/10.1117/12.2319248
SN  - 0277-786X
SN  - 1996-756X
VL  - 10700
PB  - SPIE-INT Soc Optical Engineering
CY  - Bellingham
ER  -