@article{RennerNeumannBurkartetal.2012, author = {Renner, Swen C. and Neumann, Dirk and Burkart, Michael and Feit, Ute and Giere, Peter and Groeger, Andreas and Paulsch, Axel and Paulsch, Cornelia and Sterz, Mario and Vohland, Katrin}, title = {Import and export of biological samples from tropical countries-considerations and guidelines for research teams}, series = {Organisms, diversity \& evolution : official journal of the Gesellschaft f{\"u}r Biologische Systematik}, volume = {12}, journal = {Organisms, diversity \& evolution : official journal of the Gesellschaft f{\"u}r Biologische Systematik}, number = {1}, publisher = {Springer}, address = {Heidelberg}, issn = {1439-6092}, doi = {10.1007/s13127-012-0076-4}, pages = {81 -- 98}, year = {2012}, abstract = {'Biodiversity' is increasingly perceived as an important resource for research and conservation, but also for economy. Conservation, access and sustainable use of biodiversity (genetic resources, species, samples) are negotiated on different political levels, resulting in an internationally binding legal framework. Resulting legislation is binding for all parties involved in biological sampling, i.e. researches and (and in italics) countries, and especially applies for tissue or DNA samples and dervied products thereof. Understanding and awareness of export and import permits for biological samples is increasingly important for biologists to perform research projects legally and timely. Nevertheless, some biologists are still exporting and importing biological samples ignoring or noncompliant with national and international legislation, conventions, and regulations. Resulting difficulties may not only cause serious problems during field work, but may also delay the export, import or exchange of samples. Comprehensive a priori information regarding legal requirements helps to avoid or at least diminish potential problems. We identified four major factors facilitating export/import permits: (1) good personal (mutually trusted) contacts in the country of origin, (2) understanding and compliance with all relevant laws and regulations; (3) access to information regarding knowledge on permits, regulations and laws including their circulation within the researcher communities; and (4) access to consistent and up to date regulations}, language = {en} } @misc{NeumannHorstkemperKruegeretal.2002, author = {Neumann, Bernhard and Horstkemper, Marianne and Kr{\"u}ger, Wolfgang and Wilkens, Martin and Bohlen, Andreas and Fr{\"u}bing, Peter and Wegener, Michael and Scheff, Ullrich and Neher, Dieter and Brehmer, Ludwig and Kleinpeter, Erich and Wolf, Gunter and Koetz, Joachim and Peter, Martin G. and Senkbeil, Sigrid and Meyer, Till}, title = {Portal = Im Trend: Physiker und Chemiker erforschen "Soft Matter"}, volume = {2002}, issn = {1618-6893}, doi = {10.25932/publishup-50144}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-501441}, pages = {40}, year = {2002}, abstract = {Aus dem Inhalt: Im Trend: Physiker und Chemiker erforschen „Soft Matter" -Brandenburger Netzwerk f{\"u}r Existenzgr{\"u}nder erh{\"a}lt F{\"o}rderung -Universit{\"a}t leistet Beitrag zum Romantik-Jahr -Musiksender MTV und Bryan Adams auf dem Campus}, language = {de} } @article{FritschSprengelEvansetal.2021, author = {Fritsch, Tobias and Sprengel, Maximilian and Evans, Alexander and Farahbod-Sternahl, Lena and Saliwan-Neumann, Romeo and Hofmann, Michael and Bruno, Giovanni}, title = {On the determination of residual stresses in additively manufactured lattice structures}, series = {Journal of applied crystallography / International Union of Crystallography}, volume = {54}, journal = {Journal of applied crystallography / International Union of Crystallography}, publisher = {Munksgaard}, address = {Copenhagen}, issn = {1600-5767}, doi = {10.1107/S1600576720015344}, pages = {228 -- 236}, year = {2021}, abstract = {The determination of residual stresses becomes more complicated with increasing complexity of the structures investigated. Additive manufacturing techniques generally allow the production of 'lattice structures' without any additional manufacturing step. These lattice structures consist of thin struts and are thus susceptible to internal stress-induced distortion and even cracks. In most cases, internal stresses remain locked in the structures as residual stress. The determination of the residual stress in lattice structures through nondestructive neutron diffraction is described in this work. It is shown how two difficulties can be overcome: (a) the correct alignment of the lattice structures within the neutron beam and (b) the correct determination of the residual stress field in a representative part of the structure. The magnitude and the direction of residual stress are discussed. The residual stress in the strut was found to be uniaxial and to follow the orientation of the strut, while the residual stress in the knots was more hydrostatic. Additionally, it is shown that strain measurements in at least seven independent directions are necessary for the estimation of the principal stress directions. The measurement directions should be chosen according to the sample geometry and an informed choice on the possible strain field. If the most prominent direction is not measured, the error in the calculated stress magnitude increases considerably.}, language = {en} }