Kooperativer Bibliotheksverbund

Berlin Brandenburg

and
and

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
Filter
Language
Year
  • 1
    Language: English
    In: Journal of Exotic Pet Medicine, July 2015, Vol.24(3), pp.267-275
    Description: Dermatomycoses as well as disseminated systemic mycoses are caused by emerging obligate pathogenic fungi of the families and in captive as well as in free-living reptiles. Isolation and differentiation of fungal agents and evaluation of their pathogenicity in diseased reptiles using histopathological examination are necessary to determine the pathogenicity of a fungal isolate in the disease process. Fungi formerly known as anamorph of have recently been reassigned to the family , order Onygenales (Eurotiomycetidae, Eurotiomycetes, and Ascomycota), based on phylogenetic studies. To date, 9 different reptile pathogenic species are known from this family, grouped in 3 phylogenetic lineages. The most relevant are affecting inland bearded dragons ( ) and green iguanas ( ), as well as in free-living snakes, which cause deep fungal dermatitis. Treatment with voriconazole is possible in bearded dragons and girdled lizards ( ). Other obligate pathogenic fungi belong to the family , which causes granulomatous glossitis, pharyngitis, and dermatitis, as well as disseminated visceral mycosis, in various lizards, tortoises, turtles, and crocodilians. No reports exist about successful treatments against fungal pathogens in the family . Also, voriconoazole should be used carefully in chameleons, as it does not seem to be well tolerated in these species.
    Keywords: Nannizziopsis Guarroi ; Chamaeleomyces Granulomatis ; Chamaeleomyces Viridis ; Metarhizium Anisopliae ; Purpureocillium Lilacinum ; Veterinary Medicine
    ISSN: 1557-5063
    E-ISSN: 1931-6283
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 2
    Language: English
    In: Science, May 4, 2007, Vol.316(5825), p.698(2)
    Keywords: Nanotechnology -- Research ; Semiconductors (Materials) -- Growth ; Semiconductors (Materials) -- Thermal Properties
    ISSN: 0036-8075
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 3
    Language: English
    In: Applied Physics Letters, 11 July 2011, Vol.99(2)
    Description: The development of powerful thermoelectric materials requires fast and simple characterization techniques. We combine three measurements to obtain a complete thermoelectric characterization. The electrical conductivity is measured by the van der Pauw method, while ZT is determined directly by means of a Harman measurement. Finally, exploiting the analogy between electrical and thermal physics, a thermal van der Pauw measurement is performed and the sample Seebeck coefficient and thermal conductivity can be determined. No temperature differences need to be measured; all quantities can be deduced from voltage measurements concurrently on the same sample which allows for quick and convenient material screening.
    Keywords: Electronic Transport And Semiconductors
    ISSN: 0003-6951
    E-ISSN: 1077-3118
    Source: © 2011 American Institute of Physics (AIP)〈img src=http://exlibris-pub.s3.amazonaws.com/AIP_edited.gif style="vertical-align:middle;margin-left:7px"〉
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 4
    Language: English
    In: Proceedings of the National Academy of Sciences of the United States of America, 29 September 2015, Vol.112(39), pp.12127-32
    Description: As the Cordilleran and Laurentide Ice Sheets retreated, North America was colonized by human populations; however, the spatial patterns of subsequent population growth are unclear. Temporal frequency distributions of aggregated radiocarbon ((14)C) dates are used as a proxy of population size and can be used to track this expansion. The Canadian Archaeological Radiocarbon Database contains more than 35,000 (14)C dates and is used in this study to map the spatiotemporal demographic changes of Holocene populations in North America at a continental scale for the past 13,000 y. We use the kernel method, which converts the spatial distribution of (14)C dates into estimates of population density at 500-y intervals. The resulting maps reveal temporally distinct, dynamic patterns associated with paleodemographic trends that correspond well to genetic, archaeological, and ethnohistoric evidence of human occupation. These results have implications for hypothesizing and testing migration routes into and across North America as well as the relative influence of North American populations on the evolution of the North American ecosystem.
    Keywords: Canadian Archaeological Radiocarbon Database ; Holocene ; North America ; Paleodemography ; Paleoecology ; Demography ; Ecosystem ; Human Migration -- History ; Paleontology -- Methods
    ISSN: 00278424
    E-ISSN: 1091-6490
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 5
    Language: English
    In: Electrochimica Acta, Nov 1, 2013, Vol.110, p.325(10)
    Description: To link to full-text access for this article, visit this link: http://dx.doi.org/10.1016/j.electacta.2013.04.071 Byline: Dieter Froning, Jan Brinkmann, Uwe Reimer, Volker Schmidt, Werner Lehnert, Detlef Stolten Abstract: In this paper we combine a stochastic 3D microstructure model of a fiber based gas diffusion layer of polymer electrolyte fuel cells with a Lattice Boltzmann model for fluid transport. We focus on a simple approach of compressing the planar oriented virtual geometry of paper-type gas diffusion layer from Toray. Material parameters - permeability and tortuosity - are calculated from simulation of one phase, one component gas flow in stochastic geometries. We analyze the statistical spread of simulation results on ensembles of the virtual geometry, both uncompressed and compressed. The influence of the compression is discussed with regard to the Kozeny-Carman equation. The effective transport properties calculated from transport simulations in compressed gas diffusion layers agree well with a trend based on the Kozeny-Carman equation. Author Affiliation: (a) Forschungszentrum Julich GmbH, Institute of Energy and Climate Research, IEK-3: Electrochemical Process Engineering, D-52425 Julich, Germany (b) Institute of Stochastics, Ulm University, Germany (c) Modeling in Electrochemical Process Engineering, RWTH Aachen University, Germany (d) Chair for Fuel Cells, RWTH Aachen University, Germany Article History: Received 16 November 2012; Revised 22 February 2013; Accepted 15 April 2013
    Keywords: Permeability -- Analysis ; Permeability -- Models ; Permeability -- Methods ; Fuel Cells -- Production Processes ; Fuel Cells -- Analysis ; Fuel Cells -- Models ; Fuel Cells -- Methods ; Electrochemistry -- Analysis ; Electrochemistry -- Models ; Electrochemistry -- Methods
    ISSN: 0013-4686
    Source: Cengage Learning, Inc.
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 6
    Language: English
    In: International Journal of Hydrogen Energy, 09 July 2013, Vol.38(20), pp.8448-8460
    Description: A novel, realistic 3D model is developed describing the microstructure of non-woven GDL in PEMFC which consists of strongly curved and non-overlapping fibers. The model is constructed by a two-stage procedure. First we introduce a system of random fibers, where the locations of their midpoints are modeled by a 3D Poisson point process and the fibers themselves by random 3D polygonal tracks which represent single fibers in terms of multivariate time series. Secondly, we transform the random fiber system into a system of non-overlapping fibers using an iterative method leaned on the so-called force-biased algorithm. The model is validated by comparing transport-relevant characteristics computed for experimental 3D synchrotron data, and for realizations sampled from the stochastic microstructure model. Finally, we suggest a model for the spatial distribution of PTFE, a wet-proofing agent often used in non-woven GDL, and combine this PTFE model with our new microstructure model for non-woven GDL.
    Keywords: Fiber-Based Material ; Stochastic Modeling ; Vectorial Autoregression ; Non-Woven ; Ptfe ; Synchrotron Tomography ; Engineering
    ISSN: 0360-3199
    E-ISSN: 1879-3487
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 7
    Language: English
    In: Journal of Power Sources, 01 July 2014, Vol.257, pp.52-64
    Description: A novel parametrized model that describes the 3D microstructure of compressed fiber-based materials is introduced. It allows to virtually generate the microstructure of realistically compressed gas-diffusion layers (GDL). Given the input of a 3D microstructure of some fiber-based material, the model compresses the system of fibers in a uniaxial direction for arbitrary compression rates. The basic idea is to translate the fibers in the direction of compression according to a vector field which depends on the rate of compression and on the locations of fibers within the material. In order to apply the model to experimental 3D image data of fiber-based materials given for several compression states, an optimal vector field is estimated by simulated annealing. The model is applied to 3D image data of non-woven GDL in PEMFC gained by synchrotron tomography for different compression rates. The compression model is validated by comparing structural characteristics computed for experimentally compressed and virtually compressed microstructures, where two kinds of compression – using a flat stamp and a stamp with a flow-field profile – are applied. For both stamps types, a good agreement is found. Furthermore, the compression model is combined with a stochastic 3D microstructure model for uncompressed fiber-based materials. This allows to efficiently generate compressed fiber-based microstructures in arbitrary volumes.
    Keywords: Compression Model ; Fiber-Based Materials ; Gas-Diffusion Layer ; Pemfc ; Simulated Annealing ; Stochastic Modeling ; Engineering
    ISSN: 0378-7753
    E-ISSN: 1873-2755
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 8
    Language: English
    In: Journal of Materials Science, 2011, Vol.46(24), pp.7745-7759
    Description: A stochastic network model is developed which describes the 3D morphology of the pore space in fibre-based materials. It has the form of a random geometric graph, where the vertex set is modelled by random point processes and the edges are put using tools from graph theory and Markov chain Monte Carlo simulation. The model parameters are fitted to real image data gained by X-ray synchrotron tomography. In particular, they are specified in such a way that the distributions of vertex degrees and edge lengths, respectively, coincide to a large extent for real and simulated data. Furthermore, the network model is used to introduce a morphology-based notion of pores and their sizes. The model is validated by considering physical characteristics which are relevant for transport processes in the pore space, like geometric tortuosity, i.e., the distribution of shortest path lengths through the material relative to its thickness.
    Keywords: Material Science ; Mechanics ; Crystallography ; Polymer Sciences ; Characterization and Evaluation of Materials ; Continuum Mechanics and Mechanics of Materials ; Materials Science, General ; Engineering;
    ISSN: 0022-2461
    E-ISSN: 1573-4803
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 9
    Language: English
    In: Advanced Materials, 08 October 2010, Vol.22(38), pp.4303-4307
    Description: can convert waste heat directly into electrical power and represent an important contribution to lessen energy scarcity. Here we present a novel, simple and inexpensive approach for a complete thermoelectric characterization, by which all relevant quantities, like the electrical conductivity, the thermal conductivity, the Seebeck coefficient, and the figure of merit, can be determined directly.
    Keywords: Thermoelectrics ; Characterization Tools ; Charge Transport
    ISSN: 0935-9648
    E-ISSN: 1521-4095
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 10
    Language: English
    In: Social Science & Medicine, 2004, Vol.59(10), pp.2173-2182
    Description: The article explores the rules and criteria used for the allocation of donor organs in Singapore. Organs are extremely scarce, so hard decisions have to be made about who receives them. Based on an analysis of documents and interviews done with local program directors, both the admission to a waiting list for transplant and the final recipient selection are covered. The observed practices appear remarkably similar to those predominant in several Western countries until recently, when they had to be modified there following public criticism. It remains to be seen whether Singapore can sustain its much stricter standards in the future. Keywords. Organ allocation; Patient selection; Medical utilitarianism; Socio-moral utilitarianism: Singapore
    Keywords: Organ Allocation ; Patient Selection ; Medical Utilitarianism ; Socio-Moral Utilitarianism ; Singapore ; Medicine ; Social Sciences (General) ; Public Health
    ISSN: 0277-9536
    E-ISSN: 1873-5347
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
Close ⊗
This website uses cookies and the analysis tool Matomo. Further information can be found on the KOBV privacy pages