Accuracy Estimation for Laser Point Cloud Including Scanning Geometry

Individual points produced by airborne laser scanning (ALS) may have large variation in their accuracy, a fact that is often omitted in the subsequent derivation of digital terrain models. The accuracy of a single point is governed by three main factors: First, the errors due to the direct georeferencing of the laser beam; second, the measurement errors of the laser itself; third, the variation of the range-finder error due to the changing scanning geometry. The influence of the first two sources can be estimated by means of error propagation via known functional relations of georeferencing. Nevertheless, the influence of the third component is much harder to assess as it requires a-priori knowledge of the local terrain normal to compute the incident angle and the laser footprint. We propose a novel approach that analyzes the scanning geometry quantitatively by estimating the local terrain normal directly from the laser point cloud. Adding this information to the error propagation yields a final quality indicator that reflects not only the georeferencing quality but also the scanning geometry. The paper presents first results of the developed algorithm and assesses the possibilities to use such q-indicators within DTM/DSM-production. Their benefits are especially investigated for automated data classification and generation of DTM quality metadata

Wärme­durch­blick mit dem Thermo­Planer3D

Die Suche nach Sanie­rungs­poten­zialen bei Gebäuden ist auf eine gross­flächige und detail­lierte Gebäude-Energie­beur­teilung auf Basis hoch­auf­gelöster Thermal­auf­nah­men ange­wiesen. Solche Ther­mal­auf­nah­men ermög­lichen nun die Erstel­lung von Energie­ver­brauchs­karten und Wärme­katas­tern in Stadt-, Gemeinde- und Energie­ver­sor­gungs­gebieten

The chlorite proximitor: A new tool for detecting porphyry ore deposits

publisher: Elsevier articletitle: The chlorite proximitor: A new tool for detecting porphyry ore deposits journaltitle: Journal of Geochemical Exploration articlelink: http://dx.doi.org/10.1016/j.gexplo.2015.01.005 content_type: article copyright: Crown copyright © 2015 Published by Elsevier B.V.Copyright © 2016 Elsevier B.V. or its licensors or contributors. ScienceDirect ® is a registered trademark of Elsevier B.V. [Creative Commons License 4.0]. The attached file is the published version of the article

Persistent KSHV infection increases EBV-associated tumor formation In vivo via enhanced EBV lytic gene expression

The human tumor viruses Epstein-Barr virus (EBV) and Kaposi sarcoma-associated herpesvirus (KSHV) establish persistent infections in B cells. KSHV is linked to primary effusion lymphoma (PEL), and 90% of PELs also contain EBV. Studies on persistent KSHV infection in vivo and the role of EBV co-infection in PEL development have been hampered by the absence of small animal models. We developed mice reconstituted with human immune system components as a model for KSHV infection and find that EBV/KSHV dual infection enhanced KSHV persistence and tumorigenesis. Dual-infected cells displayed a plasma cell-like gene expression pattern similar to PELs. KSHV persisted in EBV-transformed B cells and was associated with lytic EBV gene expression, resulting in increased tumor formation. Evidence of elevated lytic EBV replication was also found in EBV/KSHV dually infected lymphoproliferative disorders in humans. Our data suggest that KSHV augments EBV-associated tumorigenesis via stimulation of lytic EBV replication

The controls of post-entrapment diffusion on the solubility of chalcopyrite daughter crystals in natural quartz-hosted fluid inclusions

publisher: Elsevier articletitle: The controls of post-entrapment diffusion on the solubility of chalcopyrite daughter crystals in natural quartz-hosted fluid inclusions journaltitle: Chemical Geology articlelink: https://doi.org/10.1016/j.chemgeo.2015.07.005 content_type: article copyright: Copyright © 2015 Elsevier B.V. All rights reserved.The attached document is the authors’ final accepted version of the journal article. It is under a 24 month embargo. You are advised to consult the publisher’s version if you wish to cite from it. The published version was published in Chemical Geology Vol.412 (2015) and can be found here: https://doi.org/10.1016/j.chemgeo.2015.07.005 © 2015. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0