TY - JOUR A1 - Minnes, Mark A1 - Rüter, Sebastian A1 - Glahn, Julia A1 - Schmieder, Carsten A1 - Engelhardt, Kay A1 - Helbig, Muriel A1 - Scholz, Matthias A1 - Polok, Darius A1 - Latuske, Jörg A1 - Schmidt, Anja A1 - Stab, Uwe A1 - Francke, Christian A1 - Böhringer, Bianca A1 - Kubala, Alida A1 - Haack, Jan an T1 - Portal alumni T2 - Das Ehemaligen-Magazin der Universität Potsdam N2 - Liebe Leserin, lieber Leser, wenn es nach der Bundesfamilienrninisterin geht, soll Deutschland eines der familienfreundlichsten Länder in Europa werden. Noch sieht die Realität allerdings anders aus. Wie Ehemalige sich zwischen familiären und beruflichen Optionen entschieden haben, welche Probleme sie zu bewältigen hatten und welche Lösungen sie fanden, davon berichten sie in unserem Titelthema. Jede dritte Akademikerin bleibt heute in Deutschland kinderlos, Tendenz steigend. Abgesehen davon, dass es auch schlichtweg Lebensentwürfe ohne Kinder gibt: Ein nicht unwesentlicher Grund dafur ist sicherlich, dass die größte Last bei der Kindererziehung immer noch Frauen tragen und sie deshalb auch die größeren Einbußen in ihrer Karriere haben. So herrscht bei vielen Arbeitgebern das Vorurteil, Mütter in Führungspositionen wären weniger leistungsfahig. Dass aber gerade eine Familie Frauen in verantwortungsvollen Positionen den Rücken stärken und zu noch größerem Einsatz beflügeln kann, davon berichtet der einführende Artikel. Ein Beispiel dafür, dass sich Familie und eine berufliche Führungsposition vereinbaren lassen, ist auch Uni-Präsidentin, Prof. Dr.-Ing. Dr. Sabine Kunst. In einem Interview verrät sie ihr ganz persönliches Erfolgsrezept und stellt außerdem die strategische Ausrichtung der Hochschule in den nächsten Jahren vor. Wenn Sie Ihre Erfahrungen zu unserem Titelthema mit anderen Ehemaligen diskutieren wollen, können Sie dies unter .. Forum" in unserem "alumni-portal" tun. Wie immer freuen wir uns auf Ihre Meinung zur vorliegenden Ausgabe von ,,Portal alurnni" und wünschen Ihnen viele Vergnügen beim Lesen. Viele Grüße aus Potsdam, Ihr Alumni-Team. N2 - Dear readers, if the Federal Ministry for Family Affairs has its way, then Germany should become one ofthe most family friendly countries in Europe. However, today's reality shows a much different picture. ln our cover story, alumni report on how they have decided between familial and professional options as weil as on the problems solved along the way, and those yet to be mastered. One-third of all warnen with academic degrees do not have children. Not disregarding that there are paths in life which simply do not include having children, an important reason for this tendency lies without doubt in the fact that warnen still continue to carry the largest burden in the childrearing process, and that they therefore experience more serious Iosses regarding their professional careers than their male counterparts. For example, bias against mothers in leadership positions, due to their supposed reduced productivity, is still widely held by employers. The main article of our cover story shows that it is especially the family which can support warnen in positions of responsibility. The university's president, Prof Dr.-lng. Dr. Sabine Kunst, provides us with one prominent example of the compatibility offamily and a professionalleadership position. ln an intenview she reveals her personal recipe for success - and discusses the strategic development of the university in the years to come. lf you would like to discuss your experiences regarding family and professionallife with other alumni, please feel free to do so in the "forum" on our "alumni-portal". As always, we hope you enjoy reading this issue of the "Portal alumni" and appreciate your feedback. With best regards from Potsdam, Your Alumni Team. T3 - Portal alumni : das Ehemaligen-Magazin der Universität Potsdam - 7/2009 Y1 - 2009 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:517-opus4-482420 VL - 2009 IS - 7 EP - 59 ER - TY - JOUR A1 - Mohr, Christian Heinrich A1 - Zimmermann, Andreas A1 - Korup, Oliver A1 - Iroume, A. A1 - Francke, Till A1 - Bronstert, Axel T1 - Seasonal logging, process response, and geomorphic work JF - Earth surface dynamics N2 - Deforestation is a prominent anthropogenic cause of erosive overland flow and slope instability, boosting rates of soil erosion and concomitant sediment flux. Conventional methods of gauging or estimating post-logging sediment flux often focus on annual timescales but overlook potentially important process response on shorter intervals immediately following timber harvest. We resolve such dynamics with non-parametric quantile regression forests (QRF) based on high-frequency (3 min) discharge measurements and sediment concentration data sampled every 30-60 min in similar-sized (similar to 0.1 km(2)) forested Chilean catchments that were logged during either the rainy or the dry season. The method of QRF builds on the random forest algorithm, and combines quantile regression with repeated random sub-sampling of both cases and predictors. The algorithm belongs to the family of decision-tree classifiers, which allow quantifying relevant predictors in high-dimensional parameter space. We find that, where no logging occurred, similar to 80% of the total sediment load was transported during extremely variable runoff events during only 5% of the monitoring period. In particular, dry-season logging dampened the relative role of these rare, extreme sediment-transport events by increasing load efficiency during more efficient moderate events. We show that QRFs outperform traditional sediment rating curves (SRCs) in terms of accurately simulating short-term dynamics of sediment flux, and conclude that QRF may reliably support forest management recommendations by providing robust simulations of post-logging response of water and sediment fluxes at high temporal resolution. Y1 - 2014 U6 - https://doi.org/10.5194/esurf-2-117-2014 SN - 2196-6311 SN - 2196-632X VL - 2 IS - 1 SP - 117 EP - 125 PB - Copernicus CY - Göttingen ER - TY - JOUR A1 - Heine, Iris A1 - Francke, Till A1 - Rogass, Christian A1 - Medeiros, Pedro Henrique Augusto A1 - Bronstert, Axel A1 - Förster, Saskia T1 - Monitoring seasonal changes in the water surface areas of reservoirs using TerraSAR-X time series data in semiarid northeastern Brazil JF - IEEE journal of selected topics in applied earth observations and remote sensing N2 - The 933 km(2) Bengue catchment in northeastern Brazil is characterized by distinct rainy and dry seasons. Precipitation is stored in variously sized reservoirs, which is essential for the local population. In this study, we used TerraSAR-X SM(HH) data for an one-year monitoring of seasonal changes in the reservoir areas from July 2011 to July 2012. The monitoring was based on acquisitions in the ascending pass direction, complemented by occasional descending-pass images. To detect water surface areas, a histogram analysis followed by a global threshold classification was performed, and the results were validated using in situ GPS data. Distinguishing between small reservoirs and similar looking dark areas was difficult. Therefore, we tested several approaches for identifying misclassified areas. An analysis of the surface area dynamics of the reservoirs indicated high spatial and temporal heterogeneities and a large decrease in the total water surface area of the reservoirs in the catchment by approximately 30% within one year. KW - Image classification KW - monitoring KW - radar imaging KW - remote sensing KW - synthetic aperture radar (SAR) Y1 - 2014 U6 - https://doi.org/10.1109/JSTARS.2014.2323819 SN - 1939-1404 SN - 2151-1535 VL - 7 IS - 8 SP - 3190 EP - 3199 PB - Inst. of Electr. and Electronics Engineers CY - Piscataway ER - TY - JOUR A1 - Francke, Till A1 - Heistermann, Maik A1 - Köhli, Markus A1 - Budach, Christian A1 - Schrön, Martin A1 - Oswald, Sascha T1 - Assessing the feasibility of a directional cosmic-ray neutron sensing sensor for estimating soil moisture JF - Geoscientific Instrumentation, Methods and Data Systems N2 - Cosmic-ray neutron sensing (CRNS) is a non-invasive tool for measuring hydrogen pools such as soil moisture, snow or vegetation. The intrinsic integration over a radial hectare-scale footprint is a clear advantage for averaging out small-scale heterogeneity, but on the other hand the data may become hard to interpret in complex terrain with patchy land use. This study presents a directional shielding approach to prevent neutrons from certain angles from being counted while counting neutrons entering the detector from other angles and explores its potential to gain a sharper horizontal view on the surrounding soil moisture distribution. Using the Monte Carlo code URANOS (Ultra Rapid Neutron-Only Simulation), we modelled the effect of additional polyethylene shields on the horizontal field of view and assessed its impact on the epithermal count rate, propagated uncertainties and aggregation time. The results demonstrate that directional CRNS measurements are strongly dominated by isotropic neutron transport, which dilutes the signal of the targeted direction especially from the far field. For typical count rates of customary CRNS stations, directional shielding of half-spaces could not lead to acceptable precision at a daily time resolution. However, the mere statistical distinction of two rates should be feasible. KW - water-balance KW - quantification KW - calibration KW - validation Y1 - 2021 U6 - https://doi.org/10.5194/gi-11-75-2022 SN - 2193-0864 SN - 2193-0856 VL - 11 SP - 75 EP - 92 PB - Copernicus Publ. CY - Göttingen ER - TY - GEN A1 - Francke, Till A1 - Heistermann, Maik A1 - Köhli, Markus A1 - Budach, Christian A1 - Schrön, Martin A1 - Oswald, Sascha T1 - Assessing the feasibility of a directional cosmic-ray neutron sensing sensor for estimating soil moisture T2 - Postprints der Universität Potsdam : Mathematisch-Naturwissenschaftliche Reihe N2 - Cosmic-ray neutron sensing (CRNS) is a non-invasive tool for measuring hydrogen pools such as soil moisture, snow or vegetation. The intrinsic integration over a radial hectare-scale footprint is a clear advantage for averaging out small-scale heterogeneity, but on the other hand the data may become hard to interpret in complex terrain with patchy land use. This study presents a directional shielding approach to prevent neutrons from certain angles from being counted while counting neutrons entering the detector from other angles and explores its potential to gain a sharper horizontal view on the surrounding soil moisture distribution. Using the Monte Carlo code URANOS (Ultra Rapid Neutron-Only Simulation), we modelled the effect of additional polyethylene shields on the horizontal field of view and assessed its impact on the epithermal count rate, propagated uncertainties and aggregation time. The results demonstrate that directional CRNS measurements are strongly dominated by isotropic neutron transport, which dilutes the signal of the targeted direction especially from the far field. For typical count rates of customary CRNS stations, directional shielding of half-spaces could not lead to acceptable precision at a daily time resolution. However, the mere statistical distinction of two rates should be feasible. T3 - Zweitveröffentlichungen der Universität Potsdam : Mathematisch-Naturwissenschaftliche Reihe - 1228 KW - water-balance KW - quantification KW - calibration KW - validation Y1 - 2022 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:517-opus4-544229 SN - 1866-8372 SP - 75 EP - 92 ER -