Publikationen


Suche nach „[Hofmann] [Peter]“ hat 49 Publikationen gefunden
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    DigitalAngewandte InformatikTC Freyung

    Beitrag (Sammelband oder Tagungsband)

    Wolfgang Dorner, Luis Ramirez Camargo, Peter Hofmann

    Can Geoinformation Help to Better Protect Informal Settlements? - A Concept For the City of Medellín

    Gi4DM 2019 – GeoInformation for Disaster Management, vol. XLII-3/W8

    DOI: 10.5194/isprs-archives-XLII-3-W8-115-2019

    Abstract anzeigen

    New contributions to disaster research need to address the increasing vulnerability of informal settlements in a changing climate situation. Informal settlements are frequently built in hazardous areas and are often left out of traditional disaster risk management concepts. Hence, formal and informal societal structures, as well as technical systems to warn against, handle or mitigate natural hazards, need to evolve. Within the project Inform@Risk we are addressing these issues based on a case study in Medellín (Colombia). Here, as a result of civil conflicts informal dwellings were partly constructed by people displaced from rural areas. They are mainly located in the urban peripheral areas along steep and unstable slopes, where the resettlement of all inhabitants at risk of landslides is unfeasible. This contribution presents the technical infrastructure and the concept to incorporate geodata from different sources in an integrated landslide early warning system for some selected informal settlements of Medellin. Special attention is given to possibilities on how building societal institutions, supported by information systems, increases local resilience. Using geoformation as a basis, we will combine classical participatory planning methods with digitally assisted concepts. These include combining satellite and UAS based remote sensing data with terrestrial sensor networks, crowd sourcing and citizen science to collect volunteered geographic information about the settlement and its environmental parameters, as well as distribute this information and disseminate warnings to the local population.

    NachhaltigElektrotechnik und MedientechnikTC Freyung

    Zeitschriftenartikel

    A. Dudkiewicz, A. Lehner, Q. Chaudhry, K. Molhave, G. Allmaier, K. Tiede, Boxall, A. B. A., Peter Hofmann, J. Lewis

    Development of a sample preparation approach to measure the size of nanoparticle aggregates by electron microscopy

    [Available online 29 November 2018]

    Particuology

    DOI: 10.1016/j.partic.2018.05.007

    Abstract anzeigen

    Electron microscopy (EM) is widely used for nanoparticle (NP) sizing. Following an initial assessment of two sample preparation protocols described in the current literature as “unperturbed”, we found that neither could accurately measure the size of NPs featuring a broad size distribution, e.g., aggregates. Because many real-world NP samples consist of aggregates, this finding was of considerable concern. The data showed that the protocols introduced errors into the measurement by either inducing agglomeration artefacts or providing a skewed size distribution towards small particles (skewing artefact). The focus of this work was to develop and apply a mathematical refinement to correct the skewing artefact. This refinement provided a much improved agreement between EM and a reference methodology, when applied to the measurement of synthetic amorphous silica NPs. Further investigation, highlighted the influence of NP chemistry on the refinement. This study emphasised the urgent need for greater and more detailed consideration regarding the sample preparation of NP aggregates to routinely achieve accurate measurements by EM. This study also provided a novel refinement solution applicable to the size characterisation of silica and citrate-coated gold NPs featuring broad size distributions. With further research, this approach could be extended to other NP types

    DigitalTC Freyung

    Beitrag (Sammelband oder Tagungsband)

    Peter Hofmann

    A Fuzzy Belief-Desire-Intention Model for Agent-Based Image Analysis (Chapter 14)

    Modern Fuzzy Control Systems and Its Applications

    DigitalTC Freyung

    Beitrag (Sammelband oder Tagungsband)

    Peter Hofmann, G. Bekkarnayeva

    Object-Based Change Detection of Informal Settlements

    Proceedings of the Joint Urban Remote Sensing Event (JURSE) [Dubai, UAE; March 6-8, 2017]

    DigitalTC Freyung

    Beitrag (Sammelband oder Tagungsband)

    Peter Hofmann, V. Andrejchenko, P. Lettmayer, M. Schmitzberger, M. Gruber, I. Ozan, M. Belgiu, R. Graf, T. Lampoltshammer, S. Wegenkittl

    Agent based image analysis (ABIA)-preliminary research results from an implemented framework

    Proceedings of GEOBIA 2016: Solutions and Synergies (Enschede, Netherlands; September 14-16, 2016)

    DigitalTC Freyung

    Beitrag (Sammelband oder Tagungsband)

    G.A.O.P. Costa, Peter Hofmann, P. Happ, R. Feitosa

    An object-based meta knowledge model for a distributed image interpretation system

    Proceedings of GEOBIA 2016: Solutions and Synergies (Enschede, Netherlands; September 14-16, 2016)

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    Beitrag (Sammelband oder Tagungsband)

    Peter Hofmann, Thomas Blaschke

    Object based change detection using temporal linkages

    Proceedings of the 4th Conference on Object-Based Image Analysis (GEOBIA) 2012 (Rio de Janeiro, Brazil; May 7-9, 2012)

    DigitalTC Freyung

    Beitrag (Sammelband oder Tagungsband)

    Peter Hofmann, H. Taubenböck, C. Werthmann

    Monitoring and Modelling of Informal Settlements – a Review on Recent Developments and Challenges

    Proceedings of the 2015 Joint Urban Remote Sensing Event (JURSE) [Lausanne, Switzerland; March 30 - April 1, 2015]

    ISBN: 9781479966523

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    Beitrag (Sammelband oder Tagungsband)

    C. Leitner, Peter Hofmann, R. Marschallinger

    3D-Modeling of deformed halite hopper crystals: Object based image analysis and support vector machine, a first evaluation

    Geophysical Research Abstracts (Proceedings of the EGU General Assembly 2014; Vienna, Austria; April 27 - May 02, 2014), vol. 16

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    Beitrag (Sammelband oder Tagungsband)

    G. Atay, J. Wegner, P. Lohmann, Peter Hofmann, U. Sörgel

    Comparison of pixel based and feature based fusion of high resolution optical and SAR imagery

    Remote sensing for a changing Europe (Proceedings of the 28th EARSeL Symposium of the Association of Remote Sensing Laboratories [Istanbul, Turkey; 2-5 June 2008]), Turkey

    ISBN: 978-1-58603-986-8

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    Beitrag (Sammelband oder Tagungsband)

    Peter Hofmann, P. Lohmann, S. Müller

    Change Detection by Object-Based Change Indications

    Proceedings of the 4th EARSeL Workshop on Remote Sensing for Developing Countries in Conjunction with GISDECO (June 4-7, 2008; Istanbul, Turkey]

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    Beitrag (Sammelband oder Tagungsband)

    Peter Hofmann, J. Strobl, T. Blaschke, H. Kux

    Detecting informal settlements from Quickbird data in Rio de Janeiro using an object based approach

    Object-Based Image Analysis: Spatial Concepts for Knowledge-Driven Remote Sensing Applications, Berlin, Heidelberg

    ISBN: 3-540-77057-7

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    Beitrag (Sammelband oder Tagungsband)

    Peter Hofmann

    Detecting urban features from IKONOS data using an object-oriented approach

    Proceedings of the 1st Annual Conference of the Remote Sensing and Photogrammetry Society (RSPSoc) [London, England]

    TC Freyung

    Beitrag (Sammelband oder Tagungsband)

    C. Heipke, Peter Hofmann, P. Lohmann, S. Müller

    Concepts of an Object-Based Change Detection Process Chain for GIS Update

    Proceedings of the XXIst ISPRS Congress (July 3-11, 2008; Beijing, China)

    TC Freyung

    Beitrag (Sammelband oder Tagungsband)

    Peter Hofmann

    Defining robustness measures for OBIA framework: A case study for detecting informal settlements

    Global urban monitoring and assessment through earth observation, Boca Raton, Fla, vol. 10

    ISBN: 978-1466564497

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    Zeitschriftenartikel

    Peter Hofmann

    Defuzzification Strategies for Fuzzy Classifications of Remote Sensing Data

    Remote Sensing, vol. 8, no. 6, pp. 467-490

    DigitalTC Freyung

    Zeitschriftenartikel

    R. Marschallinger, P. Schmidt, Peter Hofmann, C. Zimmer, P. Atkinson, J. Sellner, E. Trinka, M. Mühlau

    A MS-lesion pattern discrimination plot based on geostatistics

    Brain and Behaviour, vol. 6, no. 3

    TC Freyung

    Zeitschriftenartikel

    R. Marschallinger, S. Golaszewski, A. Kunz, M. Kronbichler, G. Ladurner, Peter Hofmann, E. Trinka, M. McCoy, J. Kraus

    Usability and Potential of Geostatistics for Spatial Discrimination of Multiple Sclerosis Lesion Patterns

    Journal of Neuroimaging, vol. 24, no. 3, pp. 278-286

    TC Freyung

    Zeitschriftenartikel

    Peter Hofmann

    Multinationale Unternehmen in Schottland

    Wirtschaftsraum, Ressourcen, Umwelt (WRU), vol. 8, pp. 54-58

    TC Freyung

    Hochschulschrift

    Peter Hofmann

    Die Anwendung fernerkundlicher Daten und Methoden im Geomarketing, untersucht am Beispiel einer KFA-1000-Aufnahme von München