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Stefan Lang published an article in January 2018.
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56 shared publications
16 shared publications
10 shared publications
German Aerospace Center (DLR), Data Center (DFD) Oberpfaffenhofen
8 shared publications
University of Salzburg
2 shared publications
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(1970 - 2018)
(1970 - 2018)
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BOOK-CHAPTER 1 Read 0 Citations Earth Observation for Humanitarian Operations Published: 01 January 2018
Yearbook on Space Policy, doi: 10.1007/978-3-319-72465-2_10
Large-scale population displacements have ever increased the need for more effective humanitarian assistance. Humanitarian organizations require up-to-date reliable information about the situation on-site. Field-based surveys are often limited in crisis situations due to time or accessibility constraints. Geospatial and Earth observation (EO) technologies have increasingly become popular in the humanitarian community. An EO-based information service was set up for Médecins Sans Frontières (MSF) which provides dedicated geospatial information products in support of their operations. The core of the service portfolio is population monitoring using dwelling extraction from (multi-temporal) very high-resolution (VHR) satellite imagery. The service is mainly requested for refugee and IDP (internally displaced people) camps. Additional services on environmental resources, including groundwater, are provided on demand. As of mid-2017, over 350 maps at 60 locations in over 20 countries have been produced.
Article 0 Reads 0 Citations Urban green valuation integrating biophysical and qualitative aspects Published: 12 December 2017
European Journal of Remote Sensing, doi: 10.1080/22797254.2017.1409083
Urban green mapping has become an operational task in city planning, urban land management, and quality of life assessments. As a multi-dimensional, integrative concept, urban green comprising several ecological, socio-economic, and policy-related aspects. In this paper, the author advances the representation of urban green by deriving scale-adapted, policy-relevant units. These so-called geons represent areas of uniform green valuation under certain size and homogeneity constraints in a spatially explicit representation. The study accompanies a regular monitoring scheme carried out by the urban municipality of the city of Salzburg, Austria, using optical satellite data. It was conducted in two stages, namely SBG_QB (10.2 km², QuickBird data from 2005) and SBG_WV (140 km², WorldView-2 data from 2010), within the functional urban area of Salzburg. The geon delineation was validated by several quantitative measures and spatial analysis techniques, as well as ground documentation, including panorama photographs and visual interpretation. The spatial association pattern was assessed by calculating Global Moran’s I with incremental search distances. The final geonscape, consisting of 1083 units with an average size of 13.5 ha, was analyzed by spatial metrics. Finally, categories were derived for different types of functional geons. Future research paths and improvements to the described strategy are outlined.
BOOK-CHAPTER 0 Reads 0 Citations Land Use/Land Cover Classification of the Natural Environment Published: 01 January 2015
Applied Geoinformatics for Sustainable Integrated Land and Water Resources Management (ILWRM) in the Brahmaputra River basin, doi: 10.1007/978-81-322-1967-5_5
Land use/land cover (LULC) information is one of the most important spatial input for environmental modelling and a crucial indicator to identify and quantify natural and socioeconomic impacts triggered by LULC changes. Such impacts are related to glacier, snow cover, and permafrost melting, the forming of GLOFs, erosion by land sides, discharge and sediment transport dynamics of alpine rivers, and the socioeconomic regional urban and rural development to name some of them.
Article 0 Reads 4 Citations The Nuclear Localization of γ-Tubulin Is Regulated by SadB-mediated Phosphorylation Published: 18 June 2014
Journal of Biological Chemistry, doi: 10.1074/jbc.m114.562389
γ-Tubulin is an important cell division regulator that arranges microtubule assembly and mitotic spindle formation. Cytosolic γ-tubulin nucleates α- and β-tubulin in a growing microtubule by forming the ring-shaped protein complex γTuRC. Nuclear γ-tubulin also regulates S-phase progression by moderating the activities of E2 promoter-binding factors. The mechanism that regulates localization of γ-tubulin is currently unknown. Here, we demonstrate that the human Ser/Thr kinase SadB short localizes to chromatin and centrosomes. We found that SadB-mediated phosphorylation of γ-tubulin on Ser(385) formed chromatin-associated γ-tubulin complexes that moderate gene expression. In this way, the C-terminal region of γ-tubulin regulates S-phase progression. In addition, chromatin levels of γ-tubulin were decreased by the reduction of SadB levels or expression of a non-phosphorylatable Ala(385)-γ-tubulin but were enhanced by expression of SadB, wild-type γ-tubulin, or a phosphomimetic Asp(385)-γ-tubulin mutant. Our results demonstrate that SadB kinases regulate the cellular localization of γ-tubulin and thereby control S-phase progression.
BOOK-CHAPTER 2 Reads 2 Citations Segmentation and Object-Based Image Analysis Published: 01 January 2010
Remote Sensing and Digital Image Processing, doi: 10.1007/978-1-4020-4385-7_10
This chapter focuses on segmentation of remotely sensed image data and object-based image analysis. It discusses the differences between pixel-based and object-based image analysis; the potential of the object-based approach; and, the application of eCognition software for performing image segmentation and classification at different levels of detail.
BOOK-CHAPTER 1 Read 3 Citations GMES Services for Conflict Prevention and Mitigation: Supporting the DG RELEX in Mission Planning Published: 01 January 2010
Lecture Notes in Geoinformation and Cartography, doi: 10.1007/978-3-642-03442-8_12
Following a request from the DG RELEX in April 2008 for support in the planning of the EU mission to Darfur, the GMES-LIMES project partners in the Humanitarian Relief & Reconstruction cluster combined their expertise to contribute their support through the provision of satellite imagery based maps and information. Detailed damage assessment maps were produced for three villages that had been burnt down by militias early in 2008. Analyses were also carried out on the evolution of two large IDP camps, focussing on the population growth and densities within both the camps and the surrounding villages. In addition, rapid mapping techniques adapted to the complex humanitarian situation were applied in analysing the effects of militia raids on the three villages in West Darfur and for monitoring the evolution of the IDP camps between 2002 and 2008. The impact of the camps on the surrounding environment was also analysed using medium-resolution MODIS time series data (2000—2008).