TESSIN VISLab—laboratory for scientific visualization     

Lars Bilke  Thomas Fischer  Carolin Helbig  Charlotte Krawczyk  Thomas Nagel  Dmitri Naumov  Sebastian Paulick  Karsten Rink  Agnes Sachse  Sophie Schelenz  Marc Walther  Norihiro Watanabe  Björn Zehner  Jennifer Ziesch  Olaf Kolditz 《Environmental Earth Sciences》2014,72(10):3881-3899

Scientific visualization is an integral part of the modeling workflow, enabling researchers to understand complex or large data sets and simulation results. A high-resolution stereoscopic virtual reality (VR) environment further enhances the possibilities of visualization. Such an environment also allows collaboration in work groups including people of different backgrounds and to present results of research projects to stakeholders or the public. The requirements for the computing equipment driving the VR environment demand specialized software applications which can be run in a parallel fashion on a set of interconnected machines. Another challenge is to devise a useful data workflow from source data sets onto the display system. Therefore, we develop software applications like the OpenGeoSys Data Explorer, custom data conversion tools for established visualization packages such as ParaView and Visualization Toolkit as well as presentation and interaction techniques for 3D applications like Unity. We demonstrate our workflow by presenting visualization results for case studies from a broad range of applications. An outlook on how visualization techniques can be deeply integrated into the simulation process is given and future technical improvements such as a simplified hardware setup are outlined.  相似文献   

Assessing the saltwater remediation potential of a three-dimensional,heterogeneous, coastal aquifer system     

Marc Walther  Lars Bilke  Jens-Olaf Delfs  Thomas Graf  Jens Grundmann  Olaf Kolditz  Rudolf Liedl 《Environmental Earth Sciences》2014,72(10):3827-3837

This paper evaluates the remediation potential of a salinized coastal aquifer by utilizing a scenario simulation. Therefore, the numerical model OpenGeoSys is first validated against analytical and experimental data to represent transient groundwater level development and variable density saline intrusion. Afterwards, a regional scale model with a three-dimensional, heterogeneous hydrogeology is calibrated for a transient state and used to simulate a best-case scenario. Water balances are evaluated in both the transient calibration and scenario run. Visualization techniques help to assess the complex model output providing valuable insight in the occurring density-driven flow processes. Furthermore, modeling and visualization results give information on the time scale for remediation activities and, due to limitations in data quality and quantity reveal potential for model improvement.  相似文献   

New insights into Southern Caucasian glacial–interglacial climate conditions inferred from Quaternary gastropod fauna     

Christiane Richter  Daniel Wolf  Frank Walther  Stefan Meng  Lilit Sahakyan  Hayk Hovakimyan  Tilmann Wolpert  Markus Fuchs  Dominik Faust 《第四纪科学杂志》2020,35(5):634-649

In the present study, we performed gastropod analyses on loess–palaeosol sequences from northeast Armenia (Southern Caucasia) covering at least three glacial–interglacial cycles. The elaborated ecostratigraphy shows significant patterns of species composition related to the succession of pedocomplexes and loess, respectively. Pedocomplexes included species that can be associated with high-grass to forest-steppe biomes, indicating increased humidity for these sections compared to the loess layers. In contrast, loess layers that relate to glacial periods are associated with gastropod species of semidesert environments with shrub- and shortgrass-steppes, indicating semiarid to arid conditions. Furthermore, the loess deposits do not show any evidence for cold-adapted gastropod species. Therefore, we suggest that average July temperatures in the study area were above 10 °C, even during periods of loess deposition. Consequently, we propose that the limiting factor for tree growth during glacial periods was aridity, rather than temperature. In addition, we observe environmental differences between the various glacial times, with our results indicating a trend towards steadily increasing aridity in Southern Caucasia across the Middle to Late Pleistocene.  相似文献   

Präve,P., U. Faust,W. Sittig und D. A. Sukatsch (Hrsgb.): Handbuch der Biotechnologie. 3. Aufl., München,Wien, R. Oldenbourg Verlag, 1987, 653 S., 208 Abb., 115 Tab. u. 32 Fließschemata,broschiert DM 96,–, gebunden DM 136,–, ISBN 3-486-20039-9 (brosch.), 3-486-20320-7 (geb.)     

H.-J. Walther 《洁净——土壤、空气、水》1988,16(2):233-233

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Jahrestagung 1990 des Fachverbandes Wasserchemie der Chemischen Gesellschaft, 23.-25. Oktober,Chemnitz     

J. Kaeding  H.-J. Walther 《洁净——土壤、空气、水》1991,19(5):561-562

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Mineral magnetic record of paleoclimate variation in loess and paleosol from the Buenos Aires formation (Buenos Aires, Argentina)     

M. J. OrgeIra  A. M. Walther  C. A. Vsquez  I. Di Tommaso  S. Alonso  G. Sherwood  Hu Yuguan  J. F. A. Vilas 《Journal of South American Earth Sciences》1998,11(6):561-570

Environmental magnetic techniques were applied to a loess–paleosol sequence of the Chacopampean plain (Buenos Aires, Argentina). Mineral magnetic carriers and their grain size were identified in order to detect magnetic mineral fluctuations associated with climatic changes. Multidomain magnetite of detrital origin dominates the record. In paleosols, a high coercivity fraction was identified. Horizons with no visual evidence of pedogenesis, but showing magnetic behavior analogous to that of paleosols were observed and are thought to represent environmental conditions similar to those prevailing during paleosol formation.The results suggest that the magnetic signal yielded by paleosols in these South American loess deposits is different from that in the Chinese loess. This may be due to differences in parent materials, diagenetic processes and/or differences in paleoclimatic conditions in both regions.  相似文献   

Geologie und Praxis     

Walther Klüpfel 《International Journal of Earth Sciences》1925,16(3):190-211

Ohne Zusammenfassung  相似文献   

Über die natürliche Gliederung des Hessischen Tertiä rs und den Bewegungsmechanismus in tektonischen Senkungsfeldern     

Walther Klüpfel 《International Journal of Earth Sciences》1928,19(4):263-283

Ohne Zusammenfassung  相似文献   

Über das Alter junger Gebirgserhebung,die Datierung von Hochflächen und die Deutung von Höhenreliefs     

Walther Klüpfel 《International Journal of Earth Sciences》1931,22(5):308-313

Ohne ZusammenfassungErweiterung einer Diskussionsbemerkung auf der Hauptversammlung der Geologischen Vereinigung in Frankfurt a. M. Januar 1931.  相似文献   

Seltsame Spannungserscheinung und Bacherosion in devonischem Schiefer der Chapada bei Cuyabá in Matto Grosso (Mittel-Brasilien)     

Walther Schiller 《International Journal of Earth Sciences》1924,14(3):253-260

Ohne Zusammenfassung  相似文献