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  • 1
    Language: English
    In: European Urology, July 2014, Vol.66(1), pp.e13-e13
    Description: To link to full-text access for this article, visit this link: http://dx.doi.org/10.1016/j.eururo.2014.02.023 Byline: Vladimir Novotny, Manfred P. Wirth, Michael Froehner Author Affiliation: Department of Urology, University Hospital "Carl Gustav Carus", Technische Universitat Dresden, Dresden, Germany Article History: Accepted 11 February 2014
    Keywords: Medicine
    ISSN: 0302-2838
    E-ISSN: 1873-7560
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  • 2
    Language: English
    In: Ecological Modelling, 2011, Vol.222(3), pp.532-545
    Description: A natural river system is organized as a nested hierarchy of interconnected habitats with specific environmental conditions to which the biological community has adapted. Due to this hierarchical structure, identifying the role of different stressors on the biological community is a formidable task. Efforts trying to link stressors to biological integrity have always been bound to the geographic scale of the selected study area, leading to scale-specific results. In this research, an attempt is made to lift this limitation and develop a hierarchical, scale-sensitive methodology that can identify the significant environmental stressors to the biological community at different scales. Sites with similar background environmental conditions are clustered using self-organizing maps (SOM). This is used to identify stressors which affect the biological community throughout the area of study – called environmental gradients or large-scale stressors. Subsequently, these clusters of similar observations (sampling sites) are progressively sub-divided using environmental variables with a significant but localized effect on the biological community – called small-scale stressors. A parent group of sites is split only when the resulting sub-groups have significantly different biological responses. At the end of this recursive sites decomposition procedure, the original set of observations is organized as a tree of environmentally homogeneous groups of observations characterized by unique biological responses to multiple stressors with different geographic extents. The developed hierarchical analysis methodology has been validated using a large-size dataset of environmental observations from the State of Ohio. Our results show that habitat degradation and increased nutrient loading are the large-scale stressors with a widespread impact in Ohio. Other stressors, such as heavy metals, pH or nitrate concentrations have significant albeit localized effects on biological integrity.
    Keywords: Index of Biological Integrity ; Ecological Hierarchy ; Environmental Filters ; Scale ; Reference Conditions ; Environmental Similarity ; Self-Organizing Maps ; Hierarchical Clustering ; Environmental Sciences ; Ecology
    ISSN: 0304-3800
    E-ISSN: 1872-7026
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  • 3
    Language: English
    In: Water Research, 2011, Vol.45(7), pp.2359-2374
    Description: Indices of Biological integrity (IBI) are considered valid indicators of the overall health of a water body because the biological community is an endpoint within natural systems. However, prediction of biological integrity using information from multi-parameter environmental observations is a challenging problem due to the hierarchical organization of the natural environment, the existence of nonlinear inter-dependencies among variables as well as natural stochasticity and measurement noise. We present a method for predicting the Fish Index of Biological Integrity (IBI) using multiple environmental observations at the state-scale in Ohio. Instream (chemical and physical quality) and offstream parameters (regional and local upstream land uses, stream fragmentation, and point source density and intensity) are used for this purpose. The IBI predictions are obtained using the environmental site-similarity concept and following a simple to implement leave-one-out cross validation approach. An IBI prediction for a sampling site is calculated by averaging the observed IBI scores of observations clustered in the most similar branch of a dendrogram –a hierarchical clustering tree of environmental observations- built using the rest of the observations. The standardized Euclidean distance is used to assess dissimilarity between observations. The constructed predictive model was able to explain 61% of the IBI variability statewide. Stream fragmentation and regional land use explained 60% of the variability; the remaining 1% was explained by instream habitat quality. Metrics related to local land use, water quality, and point source density and intensity did not improve the predictive model at the state-scale. The impact of local environmental conditions was evaluated by comparing local characteristics between well- and mispredicted sites. Significant differences in local land use patterns and upstream fragmentation density explained some of the model’s over-predictions. Local land use conditions explained some of the model’s IBI under-predictions at the state-scale since none of the variables within this group were included in the best final predictive model. Under-predicted sites also had higher levels of downstream fragmentation. The proposed variables ranking and predictive modeling methodology is very well suited for the analysis of hierarchical environments, such as natural fresh water systems, with many cross-correlated environmental variables. It is computationally efficient, can be fully automated, does not make any pre-conceived assumptions on the variables interdependency structure (such as linearity), and it is able to rank variables in a database and generate IBI predictions using only non-parametric easy to implement hierarchical clustering. ► The proposed method predicts biological endpoints by comparing site-similarities. ► This is a versatile method with environmental datasets composed of multi-dimensional vectors. ► Basin-wide land use preservation and habitat continuum are crucial for biological integrity. ► Local stressors may have a significant but localized impact on biotic integrity. ► Baseline biological integrity is set by ubiquitous stressors throughout the study area.
    Keywords: Environmental Stressors ; Biological Integrity ; Geographic Scale ; Environmental Similarity ; Stressor and Biological Hierarchy ; Engineering
    ISSN: 0043-1354
    E-ISSN: 1879-2448
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  • 4
    Language: Czech
    In: Literární archiv, 2014, Issue 46, pp.65-70
    Description: The article focuses on the last period of Bohumil Hrabal’s (1914–1997) writing, particularly the late 1980s and early 1990s, when he was systematically developing distinctive essays mostly in the form of open letters. His late writing from this period was published in book form in 1990−94....
    Keywords: Studies of Literature ; Change of Style ; Feuilleton ; Open Letters ; Listopadový Uragán (November Hurricane) ; Stylized Letters ; Dopisy Dubence (Letters to April) ; Postmodern Accordionfold Board Book ; Conversational Journalism ; Languages & Literatures
    ISSN: 0231-5904
    Source: Central and Eastern European Online Library (C.E.E.O.L.)
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  • 5
    Language: Czech
    In: Studia Slavica, 2013, Vol.17(1), pp.15-22
    Description: The issue of “frontiers in literature”, that also borders taste or bad taste, and is often associated with typological categorization of literary works of literature “to read” and literature “to write”. Especially the new Czech literature while expectating a “cutting” the boundaries between...
    Keywords: Literary Texts ; Literary Criticism ; Czech Literature After 2000 ; Postmodern Prose ; Tw Adorno ; Andrej Stankovič ; Languages & Literatures
    ISSN: 1803-5663
    Source: Central and Eastern European Online Library (C.E.E.O.L.)
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  • 6
    Language: English
    In: Building Research & Information, 01 October 2013, Vol.41(5), pp.589-604
    Description: A major paradigm shift is examined for building new and retrofitting historic communities striving towards appropriate consumption of resources and reduced pollution: reusing and recycling water; recovering energy, nutrients, and other resources from used water and solids; attaining a sustainable...
    Keywords: Cities ; Drainage ; Retrofit ; Sustainable Urban Design ; Urban Planning ; Water Conservation ; Water-Energy Nexus ; Watershed Management ; Engineering
    ISSN: 0961-3218
    E-ISSN: 1466-4321
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  • 7
    In: Cancer, 15 November 2014, Vol.120(22), pp.3584-3584
    Keywords: Cystectomy ; Neoplasm Recurrence, Local -- Etiology ; Urinary Bladder Neoplasms -- Surgery;
    ISSN: 0008-543X
    E-ISSN: 1097-0142
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  • 8
    In: Water Intelligence Online, 4/2014, Vol.13
    ISSN: Water Intelligence Online
    E-ISSN: 14761777
    Source: CrossRef
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  • 9
    Language: Russian
    In: ROSSICA, 2012, Issue 1, pp.104-113
    Description: Когда летом 1921 года, на третий год существования самостоятельной Чехословацкой республики, Карел Чапек в газете ≪Лидове новины≫ размышлял о новых книгах исторической эпики Йозефа Сватоплука Махара, а именно о его ≪поэтической истории≫, то среди прочего констатировал, что ≪если из всей его...
    Keywords: Studies of Literature ; Czech Literature ; Pre-Ww I Ww I (1900 -1919) ; Interwar Period (1920 - 1939) ; Philology ; Turgenevskiy ; Rudolf Medek ; Pentology ; Literature ; History & Archaeology
    ISSN: 1211-7234
    Source: Central and Eastern European Online Library (C.E.E.O.L.)
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  • 10
    Language: Czech
    In: Bohemica Olomucensia, 2015, Vol.7(2), pp.8-18
    Description: One of the basic categories which are applied on the interpretation of Jan Čep’s work is the author’s own credo called “dioecy”, i.e., the concept of dual home, mostly differentiated as a notion of an inner and outer home. These notions acquire additional meanings particularly with a consideration...
    Keywords: Language and Literature Studies ; Prose Works By Jan Čep ; Dioecy ; Dual Home ; Second Homeland ; Exile
    ISSN: 0231-634X
    Source: Central and Eastern European Online Library (C.E.E.O.L.)
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