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Bergmark P, Hjältén J, Svensson J, Neumann W, Hekkala AM. Trait-environment interactions of saproxylic beetles as a guide to biodiversity conservation strategies. J Environ Manage 2024; 360:121080. [PMID: 38733839 DOI: 10.1016/j.jenvman.2024.121080] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/05/2024] [Revised: 04/15/2024] [Accepted: 05/02/2024] [Indexed: 05/13/2024]
Abstract
Conservation of biodiversity requires in-depth knowledge of trait-environment interactions to understand the influence the environment has on species assemblages. Saproxylic beetles exhibit a wide range of traits and functions in the forest ecosystems. Understanding their responses to surrounding environment thus improves our capacity to identify habitats that should be restored or protected. We investigated potential interactions between ecological traits in saproxylic beetles (feeding guilds and habitat preferences) and environmental variables (deadwood, type and age of surrounding forest). We sampled beetles from 78 plots containing newly created high stumps of Scots pine and Silver birch in boreal forest landscapes in Sweden for three consecutive years. Using a model based approach, our aim was to explore potential interactions between ecological traits and the surrounding environment at close and distant scale (20 m and 500 m radius). We found that broadleaf-preferring beetle species are positively associated with the local broadleaf-originated deadwood and broadleaf-rich forests in the surrounding landscapes. Conifer-preferring species are positively associated with the local amount of coniferous deadwood and young and old forests in the surrounding landscape. Fungivorous and predatory beetles are positively associated with old forests in the surrounding landscapes. Our results indicate that both local amounts of deadwood and types of forests in the landscape are important in shaping saproxylic beetle communities. We particularly highlight the need to increase deadwood amounts of various qualities in the landscape, exempt older forests from production and to increase broadleaf-rich habitats in order to meet different beetle species' habitat requirements. Trait responses among saproxylic beetles provide insights into the significance of broadleaf forest and dead wood as essential attributes in boreal forest restoration, which helps conservation planning and management in forest landscapes.
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Affiliation(s)
- Paulina Bergmark
- Department of Wildlife, Fish and Environmental Studies, Swedish University of Agricultural Sciences, 901 83, Umeå, Sweden.
| | - Joakim Hjältén
- Department of Wildlife, Fish and Environmental Studies, Swedish University of Agricultural Sciences, 901 83, Umeå, Sweden.
| | - Johan Svensson
- Department of Wildlife, Fish and Environmental Studies, Swedish University of Agricultural Sciences, 901 83, Umeå, Sweden.
| | - Wiebke Neumann
- Department of Wildlife, Fish and Environmental Studies, Swedish University of Agricultural Sciences, 901 83, Umeå, Sweden.
| | - Anne-Maarit Hekkala
- Department of Wildlife, Fish and Environmental Studies, Swedish University of Agricultural Sciences, 901 83, Umeå, Sweden.
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2
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Dijkgraaf L, Stenbacka F, Cromsigt JPGM, Ericsson G, Neumann W. Bear in mind! Bear presence and individual experience with calf survival shape the selection of calving sites in a long-lived solitary ungulate. Ecol Evol 2024; 14:e11177. [PMID: 38510538 PMCID: PMC10950790 DOI: 10.1002/ece3.11177] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2023] [Revised: 03/01/2024] [Accepted: 03/07/2024] [Indexed: 03/22/2024] Open
Abstract
The careful selection of ungulate calving sites to improve offspring survival is vital in the face of predation. In general, there is limited knowledge to which degree predator presence and prey's individual experience shape the selection of calving sites. Predator presence influences the spatiotemporal risk of encountering a predator, while individual experiences with previous predation events shape perceived mortality risks. We used a multi-year movement dataset of a long-lived female ungulate (moose, Alces alces, n = 79) and associated calf survival to test how predator presence (i.e., encounter risk) and females' individual experiences with previous calf mortality events affected their calving site selection and site fidelity. Using data from areas with and without Scandinavian brown bear (Ursus arctos) predation, we compared females' calving site selection using individual-based analyses. Our findings suggest two things. First, bear presence influences calving site selection in this solitary living ungulate. Females in areas with bears were selected for higher shrub and tree cover and showed lower site fidelity than in the bear-free area. Second, the individual experience of calf loss changes females' selection the following year. Females with lost calves had a lower site fidelity compared to females with surviving calves. Our findings suggest that increased vegetation cover may be important for reducing encounter risk in bear areas, possibly by improving calf concealment. Lower site fidelity might represent a strategy to make the placement of calving sites less predictable for predators. We suggest that bear presence shapes both habitat selection and calving site fidelity in a long-lived animal, whereas the effect of individual experience with previous calf loss varies. We encourage further research on the relevance of female experience on the success of expressed anti-predator strategies during calving periods.
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Affiliation(s)
- Lisa Dijkgraaf
- Department of Wildlife Ecology and ConservationWageningen University (WUR)WageningenThe Netherlands
- Department of Wildlife, Fish, and Environmental StudiesSwedish University of Agricultural Sciences (SLU)UmeaSweden
| | - Fredrik Stenbacka
- Department of Wildlife, Fish, and Environmental StudiesSwedish University of Agricultural Sciences (SLU)UmeaSweden
| | - Joris P. G. M. Cromsigt
- Department of Wildlife, Fish, and Environmental StudiesSwedish University of Agricultural Sciences (SLU)UmeaSweden
| | - Göran Ericsson
- Department of Wildlife, Fish, and Environmental StudiesSwedish University of Agricultural Sciences (SLU)UmeaSweden
| | - Wiebke Neumann
- Department of Wildlife, Fish, and Environmental StudiesSwedish University of Agricultural Sciences (SLU)UmeaSweden
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3
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Spitzer R, Coissac E, Cromsigt JPGM, Felton AM, Fohringer C, Landman M, Neumann W, Raubenheimer D, Singh NJ, Taberlet P, Widemo F. Macro‐nutritional balancing in a circumpolar boreal ruminant under winter conditions. Funct Ecol 2023. [DOI: 10.1111/1365-2435.14296] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/10/2023]
Affiliation(s)
- Robert Spitzer
- Department of Wildlife, Fish and Environmental Studies Swedish University of Agricultural Sciences SE‐901 83 Umeå Sweden
| | - Eric Coissac
- Université Grenoble Alpes Université Savoie Mont Blanc, CNRS, LECA, Grenoble F‐38000 France
| | - Joris P. G. M. Cromsigt
- Department of Wildlife, Fish and Environmental Studies Swedish University of Agricultural Sciences SE‐901 83 Umeå Sweden
- Centre for African Conservation Ecology Nelson Mandela University PO Box 77000, Gqeberha 6031 South Africa
| | - Annika M. Felton
- Southern Swedish Forest Research Centre Swedish University of Agricultural Sciences P.O. Box 190, SE‐234 22 Lomma Sweden
| | - Christian Fohringer
- Department of Wildlife, Fish and Environmental Studies Swedish University of Agricultural Sciences SE‐901 83 Umeå Sweden
| | - Marietjie Landman
- Centre for African Conservation Ecology Nelson Mandela University PO Box 77000, Gqeberha 6031 South Africa
| | - Wiebke Neumann
- Department of Wildlife, Fish and Environmental Studies Swedish University of Agricultural Sciences SE‐901 83 Umeå Sweden
| | - David Raubenheimer
- Charles Perkins Centre, and School of Life and Environmental Sciences University of Sydney Camperdown NSW Australia
| | - Navinder J. Singh
- Department of Wildlife, Fish and Environmental Studies Swedish University of Agricultural Sciences SE‐901 83 Umeå Sweden
| | - Pierre Taberlet
- Université Grenoble Alpes Université Savoie Mont Blanc, CNRS, LECA, Grenoble F‐38000 France
- UiT The Arctic University of Norway Tromsø Museum Tromsø Norway
| | - Fredrik Widemo
- Department of Wildlife, Fish and Environmental Studies Swedish University of Agricultural Sciences SE‐901 83 Umeå Sweden
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Bluhm H, Diserens TA, Engleder T, Heising K, Heurich M, Janík T, Jirků M, Klich D, König HJ, Kowalczyk R, Kuijper D, Maślanko W, Michler F, Neumann W, Oeser J, Olech W, Perzanowski K, Ratkiewicz M, Romportl D, Šálek M, Kuemmerle T. Widespread habitat for Europe's largest herbivores, but poor connectivity limits recolonization. DIVERS DISTRIB 2023. [DOI: 10.1111/ddi.13671] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023] Open
Affiliation(s)
- Hendrik Bluhm
- Geography Department Humboldt‐Universität zu Berlin Berlin Germany
| | - Tom A. Diserens
- Mammal Research Institute Polish Academy of Sciences Białowieża Poland
- Faculty of Biology University of Warsaw Warsaw Poland
| | | | - Kaja Heising
- Wisent‐Welt Wittgenstein e.V Bad Berleburg Germany
| | - Marco Heurich
- Chair of Wildlife Ecology and Wildlife Management University of Freiburg Freiburg Germany
- Department of Visitor Management and National Park Monitoring Bavarian Forest National Park Grafenau Germany
- Institute for Forest and Wildlife Management Inland Norway University of Applied Sciences Koppang Norway
| | - Tomáš Janík
- Department of Physical Geography and Geoecology, Faculty of Science Charles University Praha Czechia
- Department of Spatial Ecology The Silva Tarouca Research Institute for Landscape and Ornamental Gardening (VÚKOZ) Průhonice Czechia
| | - Miloslav Jirků
- Institute of Parasitology, Biology Centre Czech Academy of Sciences České Budějovice Czech Republic
| | - Daniel Klich
- Department of Animal Genetics and Conservation Warsaw University of Life Sciences Warsaw Poland
| | - Hannes J. König
- Junior Research Group Human‐Wildlife Conflict and Coexistence Leibniz Centre for Agricultural Landscape Research (ZALF) Müncheberg Germany
| | - Rafał Kowalczyk
- Mammal Research Institute Polish Academy of Sciences Białowieża Poland
| | - Dries Kuijper
- Mammal Research Institute Polish Academy of Sciences Białowieża Poland
| | - Weronika Maślanko
- Department of Animal Ethology and Wildlife Management University of Life Sciences in Lublin Lublin Poland
| | - Frank‐Uwe Michler
- Faculty of Forest and Environment Eberswalde University for Sustainable Development Eberswalde Germany
| | - Wiebke Neumann
- Department of Wildlife, Fish and Environmental Studies Swedish University of Agricultural Sciences
| | - Julian Oeser
- Geography Department Humboldt‐Universität zu Berlin Berlin Germany
| | - Wanda Olech
- Department of Animal Genetics and Conservation Warsaw University of Life Sciences Warsaw Poland
| | - Kajetan Perzanowski
- Institute of Biological Sciences Catholic University of Lublin Lublin Poland
| | | | - Dušan Romportl
- Department of Physical Geography and Geoecology, Faculty of Science Charles University Praha Czechia
- Department of Spatial Ecology The Silva Tarouca Research Institute for Landscape and Ornamental Gardening (VÚKOZ) Průhonice Czechia
| | - Martin Šálek
- Czech Academy of Sciences Institute of Vertebrate Biology Brno Czech Republic
- Faculty of Environmental Sciences Czech University of Life Sciences Prague Suchdol Czech Republic
| | - Tobias Kuemmerle
- Geography Department Humboldt‐Universität zu Berlin Berlin Germany
- Integrative Research Institute on Transformation in Human‐Environment Systems (IRI THESys) Humboldt‐Universität zu Berlin Berlin Germany
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5
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Græsli AR, Thiel A, Fuchs B, Stenbacka F, Neumann W, Malmsten J, Singh NJ, Ericsson G, Arnemo JM, Evans AL. Body temperature patterns during pregnancy and parturition in moose. J Therm Biol 2022; 109:103334. [DOI: 10.1016/j.jtherbio.2022.103334] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2022] [Revised: 09/07/2022] [Accepted: 09/13/2022] [Indexed: 11/30/2022]
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6
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van Moorter B, Singh NJ, Rolandsen CM, Solberg EJ, Dettki H, Pusenius J, Månsson J, Sand H, Milner JM, Roer O, Tallian A, Neumann W, Ericsson G, Mysterud A. Seasonal release from competition explains partial migration in European moose. OIKOS 2021. [DOI: 10.1111/oik.07875] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Bram van Moorter
- The Norwegian Inst. for Nature Research Torgarden Trondheim Norway
| | - Navinder J. Singh
- Swedish Univ. of Agricultural Sciences, Dept of Wildlife, Fish and Environmental Studies Umeå Sweden
| | | | | | - Holger Dettki
- Swedish Univ. of Agricultural Sciences, Swedish Species Information Centre Uppsala Sweden
| | | | - Johan Månsson
- Grimsö Wildlife Research Station, Dept of Ecology, Swedish Univ. of Agricultural Sciences Riddarhyttan Sweden
| | - Håkan Sand
- Grimsö Wildlife Research Station, Dept of Ecology, Swedish Univ. of Agricultural Sciences Riddarhyttan Sweden
| | - Jos M. Milner
- School of Biological Sciences, Univ. of Aberdeen Aberdeen UK
| | - Ole Roer
- Faun Naturforvaltning AS Fyresdal Norway
| | - Aimee Tallian
- The Norwegian Inst. for Nature Research Torgarden Trondheim Norway
| | - Wiebke Neumann
- Swedish Univ. of Agricultural Sciences, Dept of Wildlife, Fish and Environmental Studies Umeå Sweden
| | - Göran Ericsson
- Swedish Univ. of Agricultural Sciences, Dept of Wildlife, Fish and Environmental Studies Umeå Sweden
| | - Atle Mysterud
- The Norwegian Inst. for Nature Research Torgarden Trondheim Norway
- Centre for Ecological and Evolutionary Synthesis (CEES), Dept of Biosciences, Univ. of Oslo Blindern Oslo Norway
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7
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Neumann W, Singh NJ, Stenbacka F, Malmsten J, Wallin K, Ball JP, Ericsson G. Divergence in parturition timing and vegetation onset in a large herbivore-differences along a latitudinal gradient. Biol Lett 2020; 16:20200044. [PMID: 32544379 DOI: 10.1098/rsbl.2020.0044] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
In northern environments, the period of access to high-quality forage is limited, exerting strong selective pressure to optimize the timing of parturition. We analysed timing and variation in moose (Alces alces) parturition dates of 555 females at 18 study sites across 12° of latitude (56-68° N, 1350 km) in Sweden. We found evidence for a spatial match of parturition timing to vegetation onset, but no evidence that moose adjust parturition to vegetation onset in a given year. We found a breakpoint at 64° N. Despite adaptation across latitudes, temporal divergences occurred. Females below 64° N calved after vegetation onset and females above 64° N calved before. Here, parturition before vegetation onset might be a strategy to optimize forage utilization time with the very short growing season. Highly seasonal environments such as at higher latitudes may make it advantageous to adapt parturition towards long-term climatic patterns by matching the most favourable period. Given the direction of temporal divergence, our study suggests that climate change may have less of an impact on moose parturition at northern latitudes than southern latitudes.
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Affiliation(s)
- Wiebke Neumann
- Department of Wildlife, Fish, and Environmental Studies, Swedish University of Agricultural Sciences (SLU), SE-901 83 Umea, Sweden
| | - Navinder J Singh
- Department of Wildlife, Fish, and Environmental Studies, Swedish University of Agricultural Sciences (SLU), SE-901 83 Umea, Sweden
| | - Fredrik Stenbacka
- Department of Wildlife, Fish, and Environmental Studies, Swedish University of Agricultural Sciences (SLU), SE-901 83 Umea, Sweden
| | - Jonas Malmsten
- Department of Wildlife, Fish, and Environmental Studies, Swedish University of Agricultural Sciences (SLU), SE-901 83 Umea, Sweden
| | - Kjell Wallin
- Biological and Environmental Sciences, University of Gothenburg (GU), Box 461, SE-405 30 Gothenburg, Sweden
| | - John P Ball
- Department of Wildlife, Fish, and Environmental Studies, Swedish University of Agricultural Sciences (SLU), SE-901 83 Umea, Sweden
| | - Göran Ericsson
- Department of Wildlife, Fish, and Environmental Studies, Swedish University of Agricultural Sciences (SLU), SE-901 83 Umea, Sweden
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8
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Græsli AR, Thiel A, Fuchs B, Singh NJ, Stenbacka F, Ericsson G, Neumann W, Arnemo JM, Evans AL. Seasonal Hypometabolism in Female Moose. Front Ecol Evol 2020. [DOI: 10.3389/fevo.2020.00107] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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9
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Jaumann R, Schmitz N, Ho TM, Schröder SE, Otto KA, Stephan K, Elgner S, Krohn K, Preusker F, Scholten F, Biele J, Ulamec S, Krause C, Sugita S, Matz KD, Roatsch T, Parekh R, Mottola S, Grott M, Michel P, Trauthan F, Koncz A, Michaelis H, Lange C, Grundmann JT, Maibaum M, Sasaki K, Wolff F, Reill J, Moussi-Soffys A, Lorda L, Neumann W, Vincent JB, Wagner R, Bibring JP, Kameda S, Yano H, Watanabe S, Yoshikawa M, Tsuda Y, Okada T, Yoshimitsu T, Mimasu Y, Saiki T, Yabuta H, Rauer H, Honda R, Morota T, Yokota Y, Kouyama T. Images from the surface of asteroid Ryugu show rocks similar to carbonaceous chondrite meteorites. Science 2020; 365:817-820. [PMID: 31439797 DOI: 10.1126/science.aaw8627] [Citation(s) in RCA: 80] [Impact Index Per Article: 20.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2019] [Accepted: 07/23/2019] [Indexed: 11/02/2022]
Abstract
The near-Earth asteroid (162173) Ryugu is a 900-m-diameter dark object expected to contain primordial material from the solar nebula. The Mobile Asteroid Surface Scout (MASCOT) landed on Ryugu's surface on 3 October 2018. We present images from the MASCOT camera (MASCam) taken during the descent and while on the surface. The surface is covered by decimeter- to meter-sized rocks, with no deposits of fine-grained material. Rocks appear either bright, with smooth faces and sharp edges, or dark, with a cauliflower-like, crumbly surface. Close-up images of a rock of the latter type reveal a dark matrix with small, bright, spectrally different inclusions, implying that it did not experience extensive aqueous alteration. The inclusions appear similar to those in carbonaceous chondrite meteorites.
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Affiliation(s)
- R Jaumann
- German Aerospace Center (DLR), Institute of Planetary Research, Berlin, Germany. .,Free University of Berlin, Institute of Geosciences, Berlin, Germany
| | - N Schmitz
- German Aerospace Center (DLR), Institute of Planetary Research, Berlin, Germany
| | - T-M Ho
- DLR, Institute of Space Systems, Bremen, Germany
| | - S E Schröder
- German Aerospace Center (DLR), Institute of Planetary Research, Berlin, Germany
| | - K A Otto
- German Aerospace Center (DLR), Institute of Planetary Research, Berlin, Germany
| | - K Stephan
- German Aerospace Center (DLR), Institute of Planetary Research, Berlin, Germany
| | - S Elgner
- German Aerospace Center (DLR), Institute of Planetary Research, Berlin, Germany
| | - K Krohn
- German Aerospace Center (DLR), Institute of Planetary Research, Berlin, Germany
| | - F Preusker
- German Aerospace Center (DLR), Institute of Planetary Research, Berlin, Germany
| | - F Scholten
- German Aerospace Center (DLR), Institute of Planetary Research, Berlin, Germany
| | - J Biele
- DLR, Microgravity User Support Center, Linder Höhe, Cologne, Germany
| | - S Ulamec
- DLR, Microgravity User Support Center, Linder Höhe, Cologne, Germany
| | - C Krause
- DLR, Microgravity User Support Center, Linder Höhe, Cologne, Germany
| | - S Sugita
- Department of Earth and Planetary Science, School of Science, University of Tokyo, Tokyo 113-0033, Japan
| | - K-D Matz
- German Aerospace Center (DLR), Institute of Planetary Research, Berlin, Germany
| | - T Roatsch
- German Aerospace Center (DLR), Institute of Planetary Research, Berlin, Germany
| | - R Parekh
- German Aerospace Center (DLR), Institute of Planetary Research, Berlin, Germany.,Free University of Berlin, Institute of Geosciences, Berlin, Germany
| | - S Mottola
- German Aerospace Center (DLR), Institute of Planetary Research, Berlin, Germany
| | - M Grott
- German Aerospace Center (DLR), Institute of Planetary Research, Berlin, Germany
| | - P Michel
- Université Côte d'Azur, Observatoire de la Côte d'Azur, Centre National de la Recherche Scientifique, Laboratoire Lagrange, Nice, France
| | - F Trauthan
- German Aerospace Center (DLR), Institute of Planetary Research, Berlin, Germany
| | - A Koncz
- German Aerospace Center (DLR), Institute of Planetary Research, Berlin, Germany
| | - H Michaelis
- German Aerospace Center (DLR), Institute of Planetary Research, Berlin, Germany
| | - C Lange
- DLR, Institute of Space Systems, Bremen, Germany
| | | | - M Maibaum
- DLR, Microgravity User Support Center, Linder Höhe, Cologne, Germany
| | - K Sasaki
- DLR, Institute of Space Systems, Bremen, Germany
| | - F Wolff
- DLR, Institute of System Dynamics and Control, Oberpfaffenhofen, Germany
| | - J Reill
- DLR, Institute of Robotics and Mechatronics, Oberpfaffenhofen, Germany
| | - A Moussi-Soffys
- Centre National d'Études Spatiales, 18 Avenue E. Belin, Toulouse 31401, France
| | - L Lorda
- Centre National d'Études Spatiales, 18 Avenue E. Belin, Toulouse 31401, France
| | - W Neumann
- German Aerospace Center (DLR), Institute of Planetary Research, Berlin, Germany
| | - J-B Vincent
- German Aerospace Center (DLR), Institute of Planetary Research, Berlin, Germany
| | - R Wagner
- German Aerospace Center (DLR), Institute of Planetary Research, Berlin, Germany
| | - J-P Bibring
- L'Université de Paris Sud-Orsay, Institut d'Astrophysique Spatiale, Orsay, France
| | - S Kameda
- Department of Physics, Rikkyo University, 3-34-1 Nishi-Ikebukuro, Toshima, Tokyo 171-8501, Japan
| | - H Yano
- Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency, Sagamihara, Japan
| | - S Watanabe
- Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency, Sagamihara, Japan.,Department of Earth and Planetary Sciences, Nagoya University Furo-cho Chikusa-ku, Nagoya, Japan
| | - M Yoshikawa
- Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency, Sagamihara, Japan
| | - Y Tsuda
- Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency, Sagamihara, Japan
| | - T Okada
- Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency, Sagamihara, Japan
| | - T Yoshimitsu
- Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency, Sagamihara, Japan
| | - Y Mimasu
- Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency, Sagamihara, Japan
| | - T Saiki
- Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency, Sagamihara, Japan
| | - H Yabuta
- Department of Earth and Planetary Systems Science, Hiroshima University, Hiroshima, Japan
| | - H Rauer
- German Aerospace Center (DLR), Institute of Planetary Research, Berlin, Germany.,Free University of Berlin, Institute of Geosciences, Berlin, Germany
| | - R Honda
- Kochi University, Department of Information Science, Akebono, Kochi, Japan
| | - T Morota
- University of Tokyo, Department of Earth and Planetary Science, Hongo, Bunkyo, Tokyo, Japan
| | - Y Yokota
- Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency, Sagamihara, Japan
| | - T Kouyama
- National Institute of Advanced Industrial Science and Technology, Aomi, Koto, Tokyo, Japan
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10
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Græsli AR, Le Grand L, Thiel A, Fuchs B, Devineau O, Stenbacka F, Neumann W, Ericsson G, Singh NJ, Laske TG, Beumer LT, Arnemo JM, Evans AL. Physiological and behavioural responses of moose to hunting with dogs. Conserv Physiol 2020; 8:coaa122. [PMID: 33408867 PMCID: PMC7772614 DOI: 10.1093/conphys/coaa122] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/10/2020] [Revised: 10/02/2020] [Accepted: 12/01/2020] [Indexed: 05/19/2023]
Abstract
Optimal management of hunted species requires an understanding of the impacts of hunting on both individual animal and population levels. Recent technological advancements in biologging enable us to obtain increasingly detailed information from free-ranging animals, covering longer periods of time, and providing the data needed to assess such impacts. In Sweden, more than 80 000 moose are harvested annually, mostly hunted with the use of baying dogs. The effects of this hunting method on animal welfare and stress are understudied. Here, we evaluated 6 real and 17 experimental hunting approaches with baying dogs [wearing global positioning system (GPS) collars] on 8 adult female moose equipped with ruminal temperature loggers, subcutaneous heart rate (HR) loggers and GPS collars with accelerometers. The obtained data were used to analyse the behavioural and physiological responses of moose to hunting with dogs. Successful experimental approaches (moose and dog were within 240 m for >10 min) resulted in higher maximum body temperature (Tb, 0.88°C higher) and a mean increase in HR of 24 bpm in moose at the day of the approach compared to the day after. The moose rested on average >90 min longer the day after the approach compared to the day of the approach. The moose travelled on average 4.2 km longer and had a 1.3 m/s higher maximum speed the day of the approach compared to the day after. Our results demonstrate that hunting with dogs increase moose energy expenditure and resting time (and consequently decrease time available for foraging) on an individual level. This could possibly affect body condition and reproduction rates if the hunting disturbances occur frequently.
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Affiliation(s)
- Anne Randi Græsli
- Department of Forestry and Wildlife Management, Faculty of Applied Ecology and Agricultural Sciences, Inland Norway University of Applied Sciences, Koppang, Norway
- Corresponding author: Department of Forestry and Wildlife Management, Faculty of Applied Ecology and Agricultural Sciences, Inland Norway University of Applied Sciences, Koppang, Norway.
| | - Luc Le Grand
- Department of Forestry and Wildlife Management, Faculty of Applied Ecology and Agricultural Sciences, Inland Norway University of Applied Sciences, Koppang, Norway
| | - Alexandra Thiel
- Department of Forestry and Wildlife Management, Faculty of Applied Ecology and Agricultural Sciences, Inland Norway University of Applied Sciences, Koppang, Norway
| | - Boris Fuchs
- Department of Forestry and Wildlife Management, Faculty of Applied Ecology and Agricultural Sciences, Inland Norway University of Applied Sciences, Koppang, Norway
| | - Olivier Devineau
- Department of Forestry and Wildlife Management, Faculty of Applied Ecology and Agricultural Sciences, Inland Norway University of Applied Sciences, Koppang, Norway
| | - Fredrik Stenbacka
- Department of Wildlife, Fish and Environmental Studies, Faculty of Forest Sciences, Swedish University of Agricultural Sciences, Umeå, Sweden
| | - Wiebke Neumann
- Department of Wildlife, Fish and Environmental Studies, Faculty of Forest Sciences, Swedish University of Agricultural Sciences, Umeå, Sweden
| | - Göran Ericsson
- Department of Wildlife, Fish and Environmental Studies, Faculty of Forest Sciences, Swedish University of Agricultural Sciences, Umeå, Sweden
| | - Navinder J Singh
- Department of Wildlife, Fish and Environmental Studies, Faculty of Forest Sciences, Swedish University of Agricultural Sciences, Umeå, Sweden
| | - Timothy G Laske
- Department of Surgery, University of Minnesota, Minneapolis, MN, USA
| | | | - Jon M Arnemo
- Department of Forestry and Wildlife Management, Faculty of Applied Ecology and Agricultural Sciences, Inland Norway University of Applied Sciences, Koppang, Norway
- Department of Wildlife, Fish and Environmental Studies, Faculty of Forest Sciences, Swedish University of Agricultural Sciences, Umeå, Sweden
| | - Alina L Evans
- Department of Forestry and Wildlife Management, Faculty of Applied Ecology and Agricultural Sciences, Inland Norway University of Applied Sciences, Koppang, Norway
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Neumann W, Pusch TP, Siegfarth M, Schad LR, Stallkamp JL. CT and MRI compatibility of flexible 3D-printed materials for soft actuators and robots used in image-guided interventions. Med Phys 2019; 46:5488-5498. [PMID: 31587313 DOI: 10.1002/mp.13852] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2019] [Revised: 08/12/2019] [Accepted: 09/26/2019] [Indexed: 01/09/2023] Open
Abstract
PURPOSE Three-dimensional (3D) printing allows for the fabrication of medical devices with complex geometries, such as soft actuators and robots that can be used in image-guided interventions. This study investigates flexible and rigid 3D-printing materials in terms of their impact on multimodal medical imaging. METHODS The generation of artifacts in clinical computer tomography (CT) and magnetic resonance (MR) imaging was evaluated for six flexible and three rigid materials, each with a cubical and a cylindrical geometry, and for one exemplary flexible fluidic actuator. Additionally, CT Hounsfield units (HU) were quantified for various parameter sets iterating peak voltage, x-ray tube current, slice thickness, and convolution kernel. RESULTS We found the image artifacts caused by the materials to be negligible in both CT and MR images. The HU values mainly depended on the elemental composition of the materials and applied peak voltage was ranging between 80 and 140 kVp. Flexible, nonsilicone-based materials were ranged between 51 and 114 HU. The voltage dependency was less than 29 HU. Flexible, silicone-based materials were ranged between 60 and 365 HU. The voltage-dependent influence was as large as 172 HU. Rigid materials ranged between -69 and 132 HU. The voltage-dependent influence was <33 HU. CONCLUSIONS All tested materials may be employed for devices placed in the field of view during CT and MR imaging as no significant artifacts were measured. Moreover, the material selection in CT could be based on the desired visibility of the material depending on the application. Given the wide availability of the tested materials, we expect our results to have a positive impact on the development of devices and robots for image-guided interventions.
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Affiliation(s)
- Wiebke Neumann
- Computer Assisted Clinical Medicine, Medical Faculty Mannheim, Heidelberg University, 68167, Mannheim, Germany
| | - Tim P Pusch
- Fraunhofer Institute for Manufacturing Engineering and Automation, Project Group for Automation in Medicine and Biotechnology, 68167, Mannheim, Germany
| | - Marius Siegfarth
- Fraunhofer Institute for Manufacturing Engineering and Automation, Project Group for Automation in Medicine and Biotechnology, 68167, Mannheim, Germany
| | - Lothar R Schad
- Computer Assisted Clinical Medicine, Medical Faculty Mannheim, Heidelberg University, 68167, Mannheim, Germany
| | - Jan L Stallkamp
- Fraunhofer Institute for Manufacturing Engineering and Automation, Project Group for Automation in Medicine and Biotechnology, 68167, Mannheim, Germany.,Medical Faculty Mannheim, Heidelberg University, 68167, Mannheim, Germany
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Neumann W, Bichert A, Fleischhauer J, Stern A, Figuli R, Wilhelm M, Schad LR, Zöllner FG. A novel 3D printed mechanical actuator using centrifugal force for magnetic resonance elastography: Initial results in an anthropomorphic prostate phantom. PLoS One 2018; 13:e0205442. [PMID: 30296308 PMCID: PMC6175527 DOI: 10.1371/journal.pone.0205442] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2018] [Accepted: 09/25/2018] [Indexed: 12/12/2022] Open
Abstract
This work demonstrates a new method for the generation of mechanical shear wave during magnetic resonance elastography (MRE) that creates greater forces at higher vibrational frequencies as opposed to conventionally used pneumatic transducers. We developed an MR-compatible pneumatic turbine with an eccentric mass that creates a sinusoidal centrifugal force. The turbine was assessed with respect to its technical parameters and evaluated for MRE on a custom-made anthropomorphic prostate phantom. The silicone-based tissue-mimicking materials of the phantom were selected with regard to their complex shear moduli examined by rheometric testing. The tissue-mimicking materials closely matched human soft tissue elasticity values with a complex shear modulus ranging from 3.21 kPa to 7.29 kPa. We acquired MRE images on this phantom at 3 T with actuation frequencies of 50, 60 Hz, 70 Hz, and 80 Hz. The turbine generated vibrational wave amplitudes sufficiently large to entirely penetrate the phantoms during the feasibility study. Increased wave length in the stiffer inclusions compared to softer background material were detected. Our initial results suggest that silicone-based phantoms are useful for the evaluation of elasticities during MRE. Furthermore, our turbine seems suitable for the mechanical assessment of soft tissue during MRE.
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Affiliation(s)
- Wiebke Neumann
- Department of Computer Assisted Clinical Medicine, Medical Faculty Mannheim, Heidelberg University, Mannheim, Germany
| | - Andreas Bichert
- Department of Computer Assisted Clinical Medicine, Medical Faculty Mannheim, Heidelberg University, Mannheim, Germany
| | - Jonas Fleischhauer
- Department of Computer Assisted Clinical Medicine, Medical Faculty Mannheim, Heidelberg University, Mannheim, Germany
| | - Antonia Stern
- Department of Computer Assisted Clinical Medicine, Medical Faculty Mannheim, Heidelberg University, Mannheim, Germany
| | - Roxana Figuli
- Institute for Chemical Technology and Polymer Chemistry of Karlsruhe Institute of Technology, Karlsruhe, Germany
| | - Manfred Wilhelm
- Institute for Chemical Technology and Polymer Chemistry of Karlsruhe Institute of Technology, Karlsruhe, Germany
| | - Lothar R. Schad
- Department of Computer Assisted Clinical Medicine, Medical Faculty Mannheim, Heidelberg University, Mannheim, Germany
| | - Frank G. Zöllner
- Department of Computer Assisted Clinical Medicine, Medical Faculty Mannheim, Heidelberg University, Mannheim, Germany
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Neumann W, Schad LR, Zollner FG. A novel 3D-printed mechanical actuator using centrifugal force for magnetic resonance elastography. Annu Int Conf IEEE Eng Med Biol Soc 2018; 2017:3541-3544. [PMID: 29060662 DOI: 10.1109/embc.2017.8037621] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
Magnetic resonance elastography (MRE) is a technique for the quantification of tissue stiffness during MR examinations. It requires consistent methods for mechanical shear wave induction to the region of interest in the human body to reliably quantify elastic properties of soft tissues. This work proposes a novel 3D-printed mechanical actuator using the principle of centrifugal force for wave induction. The driver consists of a 3D-printed turbine vibrator powered by compressed air (located inside the scanner room) and an active driver controlling the pressure of inflowing air (placed outside the scanner room). The generated force of the proposed actuator increases for higher actuation frequencies as opposed to conventionally used air cushions. There, the displacement amplitude decreases with increasing actuation frequency resulting in a smaller signal-to-noise ratio. An initial phantom study is presented which demonstrates the feasibility of the actuator for MRE. The wave-actuation frequency was regulated in a range between 15 Hz and 60 Hz for force measurements and proved sufficiently stable (± 0.3 Hz) for any given nominal frequency. The generated forces depend on the weight of the eccentric unbalance within the turbine and ranged between 0.67 N to 2.70 N (for 15 Hz) and 3.09 N to 7.77 N (for 60 Hz). Therefore, the generated force of the presented actuator increases with rotational speed of the turbine and offers an elegant solution for sufficiently large wave actuation at higher frequencies. In future work, we will investigate an optimal ratio of the weight of unbalance to the size of turbine for appropriately large but tolerable wave actuation for a given nominal frequency.
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Affiliation(s)
- Wiebke Neumann
- Department of Wildlife, Fish, and Environmental Studies; Swedish University of Agricultural Sciences; Umeå SE-90183 Sweden
| | - Göran Ericsson
- Department of Wildlife, Fish, and Environmental Studies; Swedish University of Agricultural Sciences; Umeå SE-90183 Sweden
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Gaa T, Neumann W, Sudarski S, Attenberger UI, Schönberg SO, Schad LR, Zöllner FG. Comparison of perfusion models for quantitative T1 weighted DCE-MRI of rectal cancer. Sci Rep 2017; 7:12036. [PMID: 28931946 PMCID: PMC5607266 DOI: 10.1038/s41598-017-12194-w] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2017] [Accepted: 09/05/2017] [Indexed: 12/17/2022] Open
Abstract
In this work, the two compartment exchange model and two compartment uptake model were applied to obtain quantitative perfusion parameters in rectum carcinoma and the results were compared to those obtained by the deconvolution algorithm. Eighteen patients with newly diagnosed rectal carcinoma underwent 3 T MRI of the pelvis including a T1 weighted dynamic contrastenhanced (DCE) protocol before treatment. Mean values for Plasma Flow (PF), Plasma Volume (PV) and Mean Transit Time (MTT) were obtained for all three approaches and visualized in parameter cards. For the two compartment models, Akaike Information Criterion (AIC) and [Formula: see text] were calculated. Perfusion parameters determined with the compartment models show results in accordance with previous studies focusing on rectal cancer DCE-CT (PF2CX = 68 ± 44 ml/100 ml/min, PF2CU = 55 ± 36 ml/100 ml/min) with similar fit quality (AIC:169 ± 81/179 ± 77, [Formula: see text]:10 ± 12/9 ± 10). Values for PF are overestimated whereas PV and MTT are underestimated compared to results of the deconvolution algorithm. Significant differences were found among all models for perfusion parameters as well as between the AIC and [Formula: see text] values. Quantitative perfusion parameters are dependent on the chosen tracer kinetic model. According to the obtained parameters, all approaches seem capable of providing quantitative perfusion values in DCE-MRI of rectal cancer.
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Affiliation(s)
- Tanja Gaa
- Computer Assisted Clinical Medicine, Medical Faculty Mannheim, Heidelberg University, Heidelberg, Germany.
| | - Wiebke Neumann
- Computer Assisted Clinical Medicine, Medical Faculty Mannheim, Heidelberg University, Heidelberg, Germany
| | - Sonja Sudarski
- Institute of Clinical Radiology and Nuclear Medicine, Medical Faculty Mannheim, Heidelberg University, Heidelberg, Germany
| | - Ulrike I Attenberger
- Institute of Clinical Radiology and Nuclear Medicine, Medical Faculty Mannheim, Heidelberg University, Heidelberg, Germany
| | - Stefan O Schönberg
- Institute of Clinical Radiology and Nuclear Medicine, Medical Faculty Mannheim, Heidelberg University, Heidelberg, Germany
| | - Lothar R Schad
- Computer Assisted Clinical Medicine, Medical Faculty Mannheim, Heidelberg University, Heidelberg, Germany
| | - Frank G Zöllner
- Computer Assisted Clinical Medicine, Medical Faculty Mannheim, Heidelberg University, Heidelberg, Germany
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Freundlich H, Neumann W. Über die Kinetik der Umwandlung von Halogenalkylaminen in heterocyklische Verbindungen. III. (Die Umwandlang von (3-Bromäthylamin in Dimethyleniminbromhydrat.). ACTA ACUST UNITED AC 2017. [DOI: 10.1515/zpch-1914-8705] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Niemi M, Rolandsen CM, Neumann W, Kukko T, Tiilikainen R, Pusenius J, Solberg EJ, Ericsson G. Temporal patterns of moose-vehicle collisions with and without personal injuries. Accid Anal Prev 2017; 98:167-173. [PMID: 27723518 DOI: 10.1016/j.aap.2016.09.024] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/26/2015] [Revised: 06/12/2016] [Accepted: 09/22/2016] [Indexed: 06/06/2023]
Abstract
Collisions with wild ungulates are an increasing traffic safety issue in boreal regions. Crashes involving smaller-bodied deer species usually lead to vehicle damage only, whereas collisions with a large animal, such as the moose, increase the risk of personal injuries. It is therefore important to understand both the factors affecting the number of moose-vehicle collisions (MVCs) and the underlying causes that turn an MVC into an accident involving personal injuries or fatalities. As a basis for temporal mitigation measures, we examined the annual and monthly variation of MVCs with and without personal injuries. Using a 22-year-long (1990-2011) time series from Finland, we tested the effect of moose population density and traffic volume on the yearly number of all MVCs and those leading to personal injuries. We also examined the monthly distribution of MVCs with and without personal injuries, and contrasted the Finnish findings with collision data from Sweden (years 2008-2010) and Norway (years 2008-2011). Both moose population abundance indices and traffic volume were positively related to the yearly variation in the number of MVCs in Finland. The proportion of MVCs involving personal injuries decreased during our 22-year study period. The monthly distribution of all MVCs peaked during the autumn or winter depending on country, while MVCs involving personal injury peaked in summer. Our study indicates that efforts to reduce MVCs involving personal injuries need to address driver awareness and attitudes during summer, despite most MVCs occurring in autumn or winter.
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Affiliation(s)
- Milla Niemi
- University of Helsinki, Department of Forest Sciences, P.O. Box 27, FI-00014 University of Helsinki, Finland.
| | - Christer M Rolandsen
- The Norwegian Institute for Nature Research, P.O. Box 5685 Sluppen, NO-7485 Trondheim, Norway.
| | - Wiebke Neumann
- Swedish University of Agricultural Sciences, Department of Wildlife, Fish, and Environmental Studies, SE-90183 Umeå, Sweden.
| | - Tuomas Kukko
- Natural Resources Institute Finland, Natural Resources and Bioproduction, Survontie 9A, FI-40500 Jyväskylä, Finland.
| | - Raisa Tiilikainen
- Metsähallitus Parks & Wildlife Finland, Akselinkatu 8, FI-57130 Savonlinna, Finland.
| | - Jyrki Pusenius
- Natural Resources Institute Finland, Yliopistokatu 6, FI80100 Joensuu, Finland.
| | - Erling J Solberg
- The Norwegian Institute for Nature Research, P.O. Box 5685 Sluppen, NO-7485 Trondheim, Norway.
| | - Göran Ericsson
- Swedish University of Agricultural Sciences, Department of Wildlife, Fish, and Environmental Studies, SE-90183 Umeå, Sweden.
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Dehant V, Asael D, Baland RM, Baludikay BK, Beghin J, Belza J, Beuthe M, Breuer D, Chernonozhkin S, Claeys P, Cornet Y, Cornet L, Coyette A, Debaille V, Delvigne C, Deproost MH, De WInter N, Duchemin C, El Atrassi F, François C, De Keyser J, Gillmann C, Gloesener E, Goderis S, Hidaka Y, Höning D, Huber M, Hublet G, Javaux EJ, Karatekin Ö, Kodolanyi J, Revilla LL, Maes L, Maggiolo R, Mattielli N, Maurice M, McKibbin S, Morschhauser A, Neumann W, Noack L, Pham LBS, Pittarello L, Plesa AC, Rivoldini A, Robert S, Rosenblatt P, Spohn T, Storme JY, Tosi N, Trinh A, Valdes M, Vandaele AC, Vanhaecke F, Van Hoolst T, Van Roosbroek N, Wilquet V, Yseboodt M. PLANET TOPERS: Planets, Tracing the Transfer, Origin, Preservation, and Evolution of their ReservoirS. ORIGINS LIFE EVOL B 2016; 46:369-384. [PMID: 27337974 DOI: 10.1007/s11084-016-9488-z] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2015] [Accepted: 01/21/2016] [Indexed: 11/25/2022]
Abstract
The Interuniversity Attraction Pole (IAP) 'PLANET TOPERS' (Planets: Tracing the Transfer, Origin, Preservation, and Evolution of their Reservoirs) addresses the fundamental understanding of the thermal and compositional evolution of the different reservoirs of planetary bodies (core, mantle, crust, atmosphere, hydrosphere, cryosphere, and space) considering interactions and feedback mechanisms. Here we present the first results after 2 years of project work.
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Affiliation(s)
- V Dehant
- Royal Observatory of Belgium (ROB), 3 Avenue Circulaire, B-1180, Brussels, Belgium.
| | - D Asael
- Université de Liège (Ulg), 4000, Liège 1, Belgium
| | - R M Baland
- Royal Observatory of Belgium (ROB), 3 Avenue Circulaire, B-1180, Brussels, Belgium
| | | | - J Beghin
- Université de Liège (Ulg), 4000, Liège 1, Belgium
| | - J Belza
- Vrije Universiteit Brussel (VUB), Brussels, Belgium
- Universiteit Ghent (Ughent), Ghent, Belgium
| | - M Beuthe
- Royal Observatory of Belgium (ROB), 3 Avenue Circulaire, B-1180, Brussels, Belgium
| | - D Breuer
- Deutsche Zentrum für Luft- und Raumfahrt (DLR), Berlin, Germany
| | | | - Ph Claeys
- Vrije Universiteit Brussel (VUB), Brussels, Belgium
| | - Y Cornet
- Université de Liège (Ulg), 4000, Liège 1, Belgium
| | - L Cornet
- Université de Liège (Ulg), 4000, Liège 1, Belgium
| | - A Coyette
- Royal Observatory of Belgium (ROB), 3 Avenue Circulaire, B-1180, Brussels, Belgium
| | - V Debaille
- Université Libre de Bruxelles (ULB), Brussels, Belgium
| | - C Delvigne
- Université Libre de Bruxelles (ULB), Brussels, Belgium
| | - M H Deproost
- Royal Observatory of Belgium (ROB), 3 Avenue Circulaire, B-1180, Brussels, Belgium
| | - N De WInter
- Vrije Universiteit Brussel (VUB), Brussels, Belgium
| | - C Duchemin
- Université Libre de Bruxelles (ULB), Brussels, Belgium
| | - F El Atrassi
- Université Libre de Bruxelles (ULB), Brussels, Belgium
| | - C François
- Université de Liège (Ulg), 4000, Liège 1, Belgium
| | - J De Keyser
- Belgian Institute for Space Aeronomy (BISA), Brussels, Belgium
| | - C Gillmann
- Royal Observatory of Belgium (ROB), 3 Avenue Circulaire, B-1180, Brussels, Belgium
| | - E Gloesener
- Royal Observatory of Belgium (ROB), 3 Avenue Circulaire, B-1180, Brussels, Belgium
| | - S Goderis
- Vrije Universiteit Brussel (VUB), Brussels, Belgium
| | - Y Hidaka
- Université Libre de Bruxelles (ULB), Brussels, Belgium
| | - D Höning
- Deutsche Zentrum für Luft- und Raumfahrt (DLR), Berlin, Germany
| | - M Huber
- Vrije Universiteit Brussel (VUB), Brussels, Belgium
| | - G Hublet
- Université Libre de Bruxelles (ULB), Brussels, Belgium
| | - E J Javaux
- Université de Liège (Ulg), 4000, Liège 1, Belgium
| | - Ö Karatekin
- Royal Observatory of Belgium (ROB), 3 Avenue Circulaire, B-1180, Brussels, Belgium
| | - J Kodolanyi
- Vrije Universiteit Brussel (VUB), Brussels, Belgium
| | | | - L Maes
- Belgian Institute for Space Aeronomy (BISA), Brussels, Belgium
| | - R Maggiolo
- Vrije Universiteit Brussel (VUB), Brussels, Belgium
| | - N Mattielli
- Université Libre de Bruxelles (ULB), Brussels, Belgium
| | - M Maurice
- Deutsche Zentrum für Luft- und Raumfahrt (DLR), Berlin, Germany
| | - S McKibbin
- Vrije Universiteit Brussel (VUB), Brussels, Belgium
| | - A Morschhauser
- Deutsche Zentrum für Luft- und Raumfahrt (DLR), Berlin, Germany
| | - W Neumann
- Deutsche Zentrum für Luft- und Raumfahrt (DLR), Berlin, Germany
| | - L Noack
- Royal Observatory of Belgium (ROB), 3 Avenue Circulaire, B-1180, Brussels, Belgium
| | - L B S Pham
- Royal Observatory of Belgium (ROB), 3 Avenue Circulaire, B-1180, Brussels, Belgium
| | - L Pittarello
- Vrije Universiteit Brussel (VUB), Brussels, Belgium
| | - A C Plesa
- Deutsche Zentrum für Luft- und Raumfahrt (DLR), Berlin, Germany
| | - A Rivoldini
- Royal Observatory of Belgium (ROB), 3 Avenue Circulaire, B-1180, Brussels, Belgium
| | - S Robert
- Belgian Institute for Space Aeronomy (BISA), Brussels, Belgium
| | - P Rosenblatt
- Royal Observatory of Belgium (ROB), 3 Avenue Circulaire, B-1180, Brussels, Belgium
| | - T Spohn
- Deutsche Zentrum für Luft- und Raumfahrt (DLR), Berlin, Germany
| | - J -Y Storme
- Université de Liège (Ulg), 4000, Liège 1, Belgium
| | - N Tosi
- Deutsche Zentrum für Luft- und Raumfahrt (DLR), Berlin, Germany
| | - A Trinh
- Royal Observatory of Belgium (ROB), 3 Avenue Circulaire, B-1180, Brussels, Belgium
| | - M Valdes
- Université Libre de Bruxelles (ULB), Brussels, Belgium
| | - A C Vandaele
- Belgian Institute for Space Aeronomy (BISA), Brussels, Belgium
| | | | - T Van Hoolst
- Royal Observatory of Belgium (ROB), 3 Avenue Circulaire, B-1180, Brussels, Belgium
| | | | - V Wilquet
- Belgian Institute for Space Aeronomy (BISA), Brussels, Belgium
| | - M Yseboodt
- Royal Observatory of Belgium (ROB), 3 Avenue Circulaire, B-1180, Brussels, Belgium
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Neumann W, Lietzmann F, Schad LR, Zöllner FG. Design of a multimodal ( 1H/ 23Na MR/CT) anthropomorphic thorax phantom. Z Med Phys 2016; 27:124-131. [PMID: 27596568 DOI: 10.1016/j.zemedi.2016.07.004] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2016] [Revised: 07/04/2016] [Accepted: 07/26/2016] [Indexed: 01/07/2023]
Abstract
OBJECTIVES This work proposes a modular, anthropomorphic MR and CT thorax phantom that enables the comparison of experimental studies for quantitative evaluation of deformable, multimodal image registration algorithms and realistic multi-nuclear MR imaging techniques. METHODS A human thorax phantom was developed with insertable modules representing lung, liver, ribs and additional tracking spheres. The quality of human tissue mimicking characteristics was evaluated for 1H and 23Na MR as well as CT imaging. The position of landmarks in the lung lobes was tracked during CT image acquisition at several positions during breathing cycles. 1H MR measurements of the liver were repeated after seven months to determine long term stability. RESULTS The modules possess HU, T1 and T2 values comparable to human tissues (lung module: -756±148HU, artificial ribs: 218±56HU (low CaCO3 concentration) and 339±121 (high CaCO3 concentration), liver module: T1=790±28ms, T2=65±1ms). Motion analysis showed that the landmarks in the lung lobes follow a 3D trajectory similar to human breathing motion. The tracking spheres are well detectable in both CT and MRI. The parameters of the tracking spheres can be adjusted in the following ranges to result in a distinct signal: HU values from 150 to 900HU, T1 relaxation time from 550ms to 2000ms, T2 relaxation time from 40ms to 200ms. CONCLUSION The presented anthropomorphic multimodal thorax phantom fulfills the demands of a simple, inexpensive system with interchangeable components. In future, the modular design allows for complementing the present set up with additional modules focusing on specific research targets such as perfusion studies, 23Na MR quantification experiments and an increasing level of complexity for motion studies.
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Affiliation(s)
- Wiebke Neumann
- Computer Assisted Clinical Medicine, Medical Faculty Mannheim, Heidelberg University, Germany.
| | - Florian Lietzmann
- Computer Assisted Clinical Medicine, Medical Faculty Mannheim, Heidelberg University, Germany
| | - Lothar R Schad
- Computer Assisted Clinical Medicine, Medical Faculty Mannheim, Heidelberg University, Germany
| | - Frank G Zöllner
- Computer Assisted Clinical Medicine, Medical Faculty Mannheim, Heidelberg University, Germany
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Stenset NE, Lutnæs PN, Bjarnadóttir V, Dahle B, Fossum KH, Jigsved P, Johansen T, Neumann W, Opseth O, Rønning O, Steyaert SMJG, Zedrosser A, Brunberg S, Swenson JE. Seasonal and annual variation in the diet of brown bearsUrsus arctosin the boreal forest of southcentral Sweden. Wildlife Biology 2016. [DOI: 10.2981/wlb.00194] [Citation(s) in RCA: 99] [Impact Index Per Article: 12.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/01/2022]
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Neumann W. In memoriam: Prof. Dr. Johannes Heydenreich (20 June 1930 - 24 June 2015). Crystal Research and Technology 2015. [DOI: 10.1002/crat.201520013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Ericsson G, Dettki H, Neumann W, Arnemo JM, Singh NJ. Offset between GPS collar-recorded temperature in moose and ambient weather station data. EUR J WILDLIFE RES 2015. [DOI: 10.1007/s10344-015-0968-7] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Abstract
Carbaboranes are increasingly used as pharmacophores to replace phenyl substituents in established drug molecules. In contrast to traditional organic chemistry, elaborate procedures to introduce functionality frequently fail in the case of carbaboranes and their chemistry is often hampered by degradation of the cluster. Herein, the development of a one-pot synthesis of a water-soluble N-nido-dicarbaborato indole is presented, including a proposed mechanism for the reaction sequence. These studies provide useful synthetic tools for the conjugation of two important pharmacophores, indoles and carbaboranes.
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Affiliation(s)
- W Neumann
- Universität Leipzig, Institut für Anorganische Chemie, Johannisallee 29, 04103 Leipzig, Germany.
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Neumann W, Martinuzzi S, Estes AB, Pidgeon AM, Dettki H, Ericsson G, Radeloff VC. Opportunities for the application of advanced remotely-sensed data in ecological studies of terrestrial animal movement. Mov Ecol 2015; 3:8. [PMID: 25941571 PMCID: PMC4418104 DOI: 10.1186/s40462-015-0036-7] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/31/2014] [Accepted: 03/04/2015] [Indexed: 06/01/2023]
Abstract
Animal movement patterns in space and time are a central aspect of animal ecology. Remotely-sensed environmental indices can play a key role in understanding movement patterns by providing contiguous, relatively fine-scale data that link animal movements to their environment. Still, implementation of newly available remotely-sensed data is often delayed in studies of animal movement, calling for a better flow of information to researchers less familiar with remotely-sensed data applications. Here, we reviewed the application of remotely-sensed environmental indices to infer movement patterns of animals in terrestrial systems in studies published between 2002 and 2013. Next, we introduced newly available remotely-sensed products, and discussed their opportunities for animal movement studies. Studies of coarse-scale movement mostly relied on satellite data representing plant phenology or climate and weather. Studies of small-scale movement frequently used land cover data based on Landsat imagery or aerial photographs. Greater documentation of the type and resolution of remotely-sensed products in ecological movement studies would enhance their usefulness. Recent advancements in remote sensing technology improve assessments of temporal dynamics of landscapes and the three-dimensional structures of habitats, enabling near real-time environmental assessment. Online movement databases that now integrate remotely-sensed data facilitate access to remotely-sensed products for movement ecologists. We recommend that animal movement studies incorporate remotely-sensed products that provide time series of environmental response variables. This would facilitate wildlife management and conservation efforts, as well as the predictive ability of movement analyses. Closer collaboration between ecologists and remote sensing experts could considerably alleviate the implementation gap. Ecologists should not expect that indices derived from remotely-sensed data will be directly analogous to field-collected data and need to critically consider which remotely-sensed product is best suited for a given analysis.
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Affiliation(s)
- Wiebke Neumann
- />Department of Forest and Wildlife Ecology, University of Wisconsin-Madison, 1630 Linden Drive, Madison, WI 53706 USA
- />Department of Wildlife, Fish, and Environmental Studies, Swedish University of Agricultural Sciences, Umeå, SE-90183 Sweden
| | - Sebastian Martinuzzi
- />Department of Forest and Wildlife Ecology, University of Wisconsin-Madison, 1630 Linden Drive, Madison, WI 53706 USA
| | - Anna B Estes
- />Department of Forest and Wildlife Ecology, University of Wisconsin-Madison, 1630 Linden Drive, Madison, WI 53706 USA
- />The Huck Institutes of the Life Sciences, Pennsylvania State University, Pennsylvania, USA
| | - Anna M Pidgeon
- />Department of Forest and Wildlife Ecology, University of Wisconsin-Madison, 1630 Linden Drive, Madison, WI 53706 USA
| | - Holger Dettki
- />Department of Wildlife, Fish, and Environmental Studies, Swedish University of Agricultural Sciences, Umeå, SE-90183 Sweden
| | - Göran Ericsson
- />Department of Wildlife, Fish, and Environmental Studies, Swedish University of Agricultural Sciences, Umeå, SE-90183 Sweden
| | - Volker C Radeloff
- />Department of Forest and Wildlife Ecology, University of Wisconsin-Madison, 1630 Linden Drive, Madison, WI 53706 USA
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Neumann W, Hiller M, Sárosi MB, Lönnecke P, Hey-Hawkins E. Reduction of hydroxy-functionalised carbaboranyl carboxylic acids and ketones by organolithium reagents. Dalton Trans 2015; 44:6638-44. [DOI: 10.1039/c5dt00761e] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Thomaidis T, Maderer A, Formentini A, Bauer S, Trautmann M, Schwarz M, Neumann W, Kittner JM, Schad A, Link KH, Rey JW, Weinmann A, Hoffman A, Galle PR, Kornmann M, Moehler M. Proteins of the VEGFR and EGFR pathway as predictive markers for adjuvant treatment in patients with stage II/III colorectal cancer: results of the FOGT-4 trial. J Exp Clin Cancer Res 2014; 33:83. [PMID: 25272957 PMCID: PMC4192339 DOI: 10.1186/s13046-014-0083-8] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/08/2014] [Accepted: 09/24/2014] [Indexed: 12/12/2022]
Abstract
Background Unlike metastatic colorectal cancer (CRC) there are to date few reports concerning the predictive value of molecular biomarkers on the clinical outcome in stage II/III CRC patients receiving adjuvant chemotherapy. Aim of this study was to assess the predictive value of proteins related with the EGFR- and VEGFR- signalling cascades in these patients. Methods The patients' data examined in this study were from the collective of the 5-FU/FA versus 5-FU/FA/irinotecan phase III FOGT-4 trial. Tumor tissues were stained by immunohistochemistry for VEGF-C, VEGF-D, VEGFR-3, Hif-1 α, PTEN, AREG and EREG expression and evaluated by two independent, blinded investigators. Survival analyses were calculated for all patients receiving adjuvant chemotherapy in relation to expression of all makers above. Results Patients with negative AREG and EREG expression on their tumor had a significant longer DFS in comparison to AREG/EREG positive ones (p< 0.05). The benefit on DFS in AREG-/EREG- patients was even stronger in the group that received 5-FU/FA/irinotecan as adjuvant treatment (p=0.002). Patients with strong expression of PTEN profited more in terms of OS under adjuvant treatment containing irinotecan (p< 0.05). Regarding markers of the VEGFR- pathway we found no correlation of VEGF-C- and VEGFR-3 expression with clinical outcome. Patients with negative VEGF-D expression had a trend to live longer when treated with 5-FU/FA (p=0.106). Patients who were negative for Hif-1 α, were disease-free in more than 50% at the end of the study and showed significant longer DFS-rates than those positive for Hif-1 α (p=0.007). This benefit was even stronger at the group treated with 5-FU/FA/irinotecan (p=0.026). Finally, AREG-/EREG-/PTEN+ patients showed a trend to live longer under combined treatment combination. Conclusions The addition of irinotecan to adjuvant treatment with 5-FU/FA does not provide OS or DFS benefit in patients with stage II/III CRC. Nevertheless, AREG/EREG negative, PTEN positive and Hif-1 α negative patients might profit significantly in terms of DFS from a treatment containing fluoropyrimidines and irinotecan. Our results suggest a predictive value of these biomarkers concerning adjuvant chemotherapy with 5-FU/FA +/− irinotecan in stage II/III colorectal cancer. Electronic supplementary material The online version of this article (doi:10.1186/s13046-014-0083-8) contains supplementary material, which is available to authorized users.
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Neumann W, Benz KW. In memoriam of the 100th anniversary of the birthday of Hermann Neels (23. 1. 1913-5. 11. 2002). Cryst Res Technol 2013. [DOI: 10.1002/crat.201310001] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Zheng C, Scheerschmidt K, Kirmse H, Häusler I, Neumann W. Imaging of three-dimensional (Si,Ge) nanostructures by off-axis electron holography. Ultramicroscopy 2013; 124:108-16. [DOI: 10.1016/j.ultramic.2012.09.004] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2012] [Revised: 09/06/2012] [Accepted: 09/17/2012] [Indexed: 10/27/2022]
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Abstract
Studies of free-ranging wildlife often involve animal capture and fitting of tracking devices. Capturing wildlife may result in behavioral alterations. Thus, there is a need to evaluate the effects of capture on study animals to identify potential biases influencing the research. We assessed the short-term response of 15 GPS/GSM-collared adult female moose ( Alces alces (L., 1758)) and immobilization and handling by comparing moose rates of movement and net square displacement before and after recapture. Moose were more active up to 7 h and increased their spatial displacement for 4.5 days after recapture compared with movement patterns before recapture. Opposite to our predictions, moose did not reduced their movement rates after their initial displacement following capture and recovery, i.e., moose did not show any indication for a residual effect. We recommend using individuals as their own controls in analyses of capture impacts to account adequately for individual behavioral differences. We recommend omitting data of at least the first 5 days following capture for analyses of moose movement and distribution.
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Affiliation(s)
- Wiebke Neumann
- Department of Wildlife, Fish, and Environmental Studies, Swedish University of Agricultural Sciences, 901 83 Umeå, Sweden
| | - Göran Ericsson
- Department of Wildlife, Fish, and Environmental Studies, Swedish University of Agricultural Sciences, 901 83 Umeå, Sweden
| | - Holger Dettki
- Department of Wildlife, Fish, and Environmental Studies, Swedish University of Agricultural Sciences, 901 83 Umeå, Sweden
| | - Jon M. Arnemo
- Department of Forestry and Wildlife Management, Hedmark University College, P.O. Box 400, NO-2418 Elverum, Norway; Department of Wildlife, Fish, and Environmental Studies, Swedish University of Agricultural Sciences, 901 83 Umeå, Sweden
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Moeck P, Rouvimov S, Rauch EF, Véron M, Kirmse H, Häusler I, Neumann W, Bultreys D, Maniette Y, Nicolopoulos S. High spatial resolution semi-automatic crystallite orientation and phase mapping of nanocrystals in transmission electron microscopes. Cryst Res Technol 2011. [DOI: 10.1002/crat.201000676] [Citation(s) in RCA: 112] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Støen OG, Neumann W, Ericsson G, Swenson JE, Dettki H, Kindberg J, Nellemann C. Behavioural response of moose Alces alces and brown bears Ursus arctos to direct helicopter approach by researchers. Wildlife Biology 2010. [DOI: 10.2981/09-041] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/01/2022]
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Abstract
The microstructure of nonpolar m-plane (1100) oriented GaN layers deposited on (100)gamma-LiAlO(2) was analysed by transmission electron microscopy. This study shows that the films contain a large number of defects. The most dominant defects in the m-plane GaN are intrinsic I(1) basal plane stacking faults (approximately 10(4) cm(-1)), threading dislocations (approximately 10(9) cm(-2)) as well as a complex defect network consisting of planar defects located on prismatic {1010} GaN and differently inclined pyramidal planes. A large number of the stacking faults nucleate at the GaN/LiAlO(2) interface. Furthermore, the inclined planar defects act as additional nucleation sites for the basal plane stacking faults. A decreasing crystal quality with an increasing layer thickness can be explained by this defect formation mechanism.
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Affiliation(s)
- W Neumann
- Institut für Physik, Humboldt Universität zu Berlin, Berlin, Germany.
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Berth A, Pap G, Awiszus F, Neumann W. Central motor deficits of the deltoid muscle in patients with chronic rotator cuff tears. Acta Chir Orthop Traumatol Cech 2009; 76:456-461. [PMID: 20067692] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
PURPOSE OF THE STUDY Previous surface EMG studies have shown that chronic rotator cuff tears (RCT) may be associated with a altered activation of adjacent shoulder muscles. The effect of RCT on central neuromuscular control mechanisms of the shoulder girdle muscles such as the deltoideus muscle (MD), a key muscle of shoulder function, has as yet not been studied in detail. This study investigated the cortico-spinal excitability of the MD to assess the effects of RCT on the central neuromuscular function of upper limb muscles. MATERIAL AND METHODS The motor evoked potentials (MEP) in response to transcranial magnetic stimulation of MD and first dorsal interosseus muscle (FDI) on both sides were obtained of six right-handed men with chronic, symptomatic, full-thickness RCT on the dominant sides. Stimulus response curves at four different levels were measured at two tasks (MD at rest and during activity). RESULTS Different interactions were found between stimulus intensity, task and side for MEP of the MD (F = 3.9, P = 0.03), indicating that MD excitability on the affected side were lower when compared with the non-affected side. No correlation was found between the correspondent MEP amplitudes of MD and FDI at rest (r = 0.1, P = 0.44) and MD activation (r = 0.3, P = 0.05) on the affected side whereas a correlation existed on the non-affected side at rest (r = 0.5, P = 0.007) and during activation (r = 0.8, P < 0.001). CONCLUSIONS These decreased cortico-motoneuronal excitability of the MD on the affected side seems to related to adaptive chan- ges in motor cortex as a consequence of chronic RCT. The data suggest an involvement of central mechanisms and seem to precede severe changes of osteoarthritis of the shoulder.
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Affiliation(s)
- A Berth
- Department of Orthopaedic Surgery, Otto-von-Guericke-University, Magdeburg, Germany.
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Kirmse H, Neumann W, Kret S, Dłużewski P, Janik E, Karczewski G, Wojtowicz T. TEM characterization of VLS-grown ZnTe nanowires. ACTA ACUST UNITED AC 2008. [DOI: 10.1002/pssc.200780197] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Neumann W, Kirmse H, Kret S, Dluzewski P, Janik E, Presz A, Karczewski G, Wojtowicz T, Zaleszczyk W. Analysis of atomic structure and structural imperfections of ZnTe and (Zn,Mn)Te nanowires. Acta Crystallogr A 2008. [DOI: 10.1107/s010876730808077x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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Halder AM, Neumann W. [Minimal invasive total knee replacement in tibia first technique]. Orthopade 2007; 36:1129-34. [PMID: 18004542 DOI: 10.1007/s00132-007-1158-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Existing techniques for minimal invasive total knee replacement use a shortened parapatellar, a quad-sparing or a midvastus approach, cut the femur first using bony landmarks as reference. Therefore an operative technique was developed to preserve the extensor apparatus entirely using a subcutaneous subvastus approach. The tibia is cut first and the following bone cuts are soft tissue tension referenced. The short term results of this and other minimal invasive techniques show accelerated rehabilitation with less postoperative pain, while the operation is prolonged with an increased risk of component malalignment. Consequently minimal invasive techniques for total knee replacement should be adopted gradually, long term results are still missing anyhow.
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Affiliation(s)
- A M Halder
- Klinik für Endoprothetik, Waldhausstrasse 1, 16766, Sommerfeld, Germany.
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Gorschewsky O, Klakow A, Pütz A, Mahn H, Neumann W. Clinical comparison of the autologous quadriceps tendon (BQT) and the autologous patella tendon (BPTB) for the reconstruction of the anterior cruciate ligament. Knee Surg Sports Traumatol Arthrosc 2007; 15:1284-92. [PMID: 17721778 DOI: 10.1007/s00167-007-0371-3] [Citation(s) in RCA: 87] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/02/2007] [Accepted: 05/21/2007] [Indexed: 02/05/2023]
Abstract
The use of the BPTB-autograft is a very common method for ACL reconstruction. Nevertheless, the problem of the typical donor-site-morbidity is unresolved. Recently, a transplant of quadriceps tendon, with an attached bone block (BQT) has been increasingly relied upon. The purpose of this study was to examine the clinical results of a group of patients after arthroscopic ACL reconstruction using either BPTB or quadriceps tendon autograft after a minimum follow-up of 2 years in terms of knee joint stability and function using both subjective and objective criteria. Retrospective study. A total of 260 patients with ACL ruptures were operated between 1995 and 2000; 124 received a BQT-autograft, including 8 revisions; 136 patients received a BPTB-autograft, exclusively primary interventions. The results were evaluated using the IKDC-, Noyes- and Lysholm-Scores. It was possible to re-evaluate 194 patients after a minimum follow-up period of 2 years, 64 of 260 patients (25%) were lost to follow-up. Ninety-seven percent of the operated knee joints in the BPTB-group were judged as normal or almost normal with the IKDC evaluation, as were 83% in the BQT-group (P < or = 0.001). The BQT-group showed a significantly better result in the evaluation of the donor-site-morbidity. We found no significant differences in the functional outcome according to the Lysholm- and Noyes-Score. In comparison to the results after using a BQT-transplant for reconstruction of a ruptured ACL the use of the BPTB-transplant is in favour concerning patient satisfaction and IKDC evaluation. For patients with activities involving kneeling or prolonged flexion of the knee joint BQT-transplants can be a good alternative, however.
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Affiliation(s)
- O Gorschewsky
- Department of Sportorthopaedics, Klinik Sonnenhof, Buchserstrasse 30, 3006 Bern, Switzerland.
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Neumann W, Häusler I, Kirmse H. Composition analysis of nanostructured materials by TEM – possibilities and limitations. Acta Crystallogr A 2007. [DOI: 10.1107/s010876730709856x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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Schönberg C, Petrowski K, Neumann W, Joraschky P. Passungsprozesse im Kontext von partnerschaftlicher Gesundheit. Psychother Psychosom Med Psychol 2007. [DOI: 10.1055/s-2007-970710] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Abstract
Peak-finding procedures and the geometric phase method of quantitative high resolution electron microscopy (qHRTEM) were applied to determine the local strain and the chemical composition of nanostructured semiconductor materials. The growth of the structures investigated was induced by minimization of strain energy. The analysis of strain distribution is necessary for the understanding of the self-organized formation of nanostructures. The possibilities and limitations of the methods are discussed in detail by analysing HRTEM images of (Si,Ge) islands and of a double layer of stacked quantum dots of (In,Ga)As and Ga(Sb,As).
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Affiliation(s)
- W Neumann
- Institute of Physics, Humboldt University of Berlin, Berlin, Germany.
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Kirmse H, Häusler I, Hähnert I, Neumann W, Scheerschmidt K. Computer assisted analysis of diffuse electron diffraction of precipitates in GaAs. Acta Crystallogr A 2006. [DOI: 10.1107/s0108767306099028] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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