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  • 1
    Online Resource
    Online Resource
    Visualization of categorical data (1998)
    San Diego [u.a.] : Academic Press
    Details Availability
    Keywords: Multivariate analysis Graphic methods ; Multivariate analysis Graphic methods ; Multivariate analysis ; Graphic methods ; Grafische voorstellingen ; Kwalitatieve gegevens ; Análise multivariada ; MATHEMATICS ; Graphic Methods ; Analyse multivariée - Méthodes graphiques ; Electronic books ; Electronic books ; Aufsatzsammlung ; Multivariate Analyse ; Grafische Darstellung ; Multivariate Daten ; Analyse ; Grafische Darstellung
    Description / Table of Contents: J. de Leeuw, Keynote Chapter: Heres Looking at Multivariables. Graphics for Visualization: M. Friendly, Conceptual Models for Visualizing Contingency Table Data. J.-H. Chauchat and A. Risson, BERTINs Graphics and Multidimensional Data Analysis Methods. B. Francis, M. Fuller, and J. Pritchard, The Use of Visualization in the Examination of Categorical Event Histories. T. Aluja-Banet and E. Nafroa, General Impurity and Data Diagnostics in Decision Trees. U. Frick, J. Rehm, K.E. Wolff, and M. Laschat, Obstetricians Attitudes on Perinatal Risk: The Role of Quantitative and Conceptual Scaling Procedures. K.E. Wolff and S. Gabler, Comparison of Visualizations in Formal Concept Analysisand Correspondence Analysis. V. Choulakian and J. Allard, The Z-Plot: A Graphical Procedure for Contingency Tables with an Ordered Response Variable. Correspondence Analysis: I. Partchev, Using Visualization Techniques to Explore Bulgarian Politics. B. Martens and J. Kastl, Visualization of Agenda Building Processes by Correspondence Analysis. L. Lebart, Visualizations of Textual Data. M.B. Bertaut Visualization of Open Questions: French Study of Pupils Attitudes to Mathematics. F. Fehlen, The Cloud of Candidates. Exploring the Political Field. C. Tarnai and U. Wuggenig, Normative Integration of the Avant-garde? Traditionalism in the Art Fields of Vienna, Hamburg, and Paris. S. Nishisato, Graphing is Believing: Interpretable Graphs for Dual Scaling. B. Le Roux and H. Rouanet, Interpreting the Axes in Multiple Correspondence Analysis: Method of the Contributions of Points and Deviations. M. Greenacre, Diagnostics for Joint Displays in Correspondence Analysis. V. Thiessen and J. Blasius, Using Multiple Correspondence Analysis to Distinguish between Substantive and Non-Substantive Responses. A. Carlier and P.M. Kroonenberg, The Case of the French Cantons: An Application of Three-Way Correspondence Analysis. J.J. Meulman and W.J. Heiser, Visual Display of Interaction in Multiway Contingency Tables by Homogeneity in Analysis: the 2 x 2 x 2 Case. S. Balbi, Graphical Displays in Non-Symmetric Correspondence Analysis. R. Siciliano and F. Mola, Ternary Classification Trees: A Factorial Approach. Multidimensional Scaling and Biplot: A. Kimball Ronney, C.C. Moore, and T.J. Brazill, Correspondence Analysis as A Multidimensional Scaling Technique for Non-Frequency Similarity Matrices. I. Borg and P.J.F. Groenen, Regional Interpretations in Multidimensional Scaling. C.M. Cuadras and J. Fortiana, Visualizing Categorical Data with Related Metric Scaling. M. Vuylsteke-Wauters, J. Billiet, H. De Witte, and F. Symons, Contrasting the Electorates of Eight Political Parties: A Visual Presentation Using the Biplot. K. Ruben Gabriel, M. Purificacion Galindo, and J.L. Vicente-Villardon, Use of Biplots to Diagnose Independence Models in Three-Way Contingency Tables. J.C. Gower and S.A. Harding, Prediction Regions for Categorical Variables. Visualization in Modeling: C.C. Clogg, T. Rudas, and S. Matthews, Analysis of Contingency Tables Using Graphical Displays Based on the Mixture Index of Fit. Y. Takane, Visualization in Ideal Point Discriminant Analysis. U. Bickenholt, Modeling Time-Dependent Preferences: Drifts in Ideal Points. A.L. McCutcheon, Correspondence Analysis Used Complementary to Latent Class Analysis in Comparative Social Research. L. Andries van der Ark and P.G.M. van der Heijden, Graphical Display of Latent Class Analysis, with Special Reference to Correspondence Analysis. J. Magidson, Using New General Ordinal Logit Displays to Visualizethe Effects in Categorical Outcome Data. A. de Falguerolles, Log-bilinear Biplots in Action. References. Index
    Type of Medium: Online Resource
    Pages: Online Ressource (xiv, 594 p.) , illustrations (some color)
    Edition: ScienceDirect
    ISBN: 9780122990458 , 0122990455 , 9780080543628 , 0080543626 , 1281054208 , 9781281054203
    URL: https://doi.org/10.1016/B978-0-12-299045-8.X5000-1
    URL: http://www.sciencedirect.com/science/book/9780122990458
    URL: https://www.sciencedirect.com/science/book/9780122990458
    URL: http://www.gbv.de/dms/bowker/toc/9780122990458.pdf
    DOI: 10.1016/B978-0-12-299045-8.X5000-1
    RVK:
    MR 2100
    Language: English
    Note: Includes bibliographical references (p. 541-574) and index. - Description based on print version record
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  • 2
    Electronic Resource
    Electronic Resource
    Unfolding a symmetric matrix (1996)
    Springer
    Journal of classification 13 (1996), S. 81-105 
    Details
    ISSN: 1432-1343
    Keywords: Dimensionality reduction ; Distances ; Graphics ; Multidimensional scaling ; Symmetric matrices ; Unfolding
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics
    Notes: Abstract Graphical displays which show inter-sample distances are important for the interpretation and presentation of multivariate data. Except when the displays are two-dimensional, however, they are often difficult to visualize as a whole. A device, based on multidimensional unfolding, is described for presenting some intrinsically high-dimensional displays in fewer, usually two, dimensions. This goal is achieved by representing each sample by a pair of points, sayR i andr i, so that a theoretical distance between thei-th andj-th samples is represented twice, once by the distance betweenR i andr j and once by the distance betweenR j andr i. Selfdistances betweenR i andr i need not be zero. The mathematical conditions for unfolding to exhibit symmetry are established. Algorithms for finding approximate fits, not constrained to be symmetric, are discussed and some examples are given.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01202583
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    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Book reviews (1987)
    Springer
    Journal of classification 4 (1987), S. 245-278 
    Details
    ISSN: 1432-1343
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01896990
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    Paper (German National Licenses)
    Fulltext
  • 4
    Electronic Resource
    Electronic Resource
    Clustering the rows and columns of a contingency table (1988)
    Springer
    Journal of classification 5 (1988), S. 39-51 
    Details
    ISSN: 1432-1343
    Keywords: Chi-square statistic ; Cluster analysis ; Contingency tables ; Correspondence analysis ; Multiple comparisons ; Wishart distribution
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics
    Notes: Abstract A number of ways of investigating heterogeneity in a two-way contingency table are reviewed. In particular, we consider chi-square decompositions of the Pearson chi-square statistic with respect to the nodes of a hierarchical clustering of the rows and/or the columns of the table. A cut-off point which indicates “significant clustering” may be defined on the binary trees associated with the respective row and column cluster analyses. This approach provides a simple graphical procedure which is useful in interpreting a significant chi-square statistic of a contingency table.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01901670
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    Paper (German National Licenses)
    Fulltext
  • 5
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    Membrane lipid sensitivity to ocean warming and acidification poses a severe threat to Arctic pteropods (2022)
    Frontiers
    Details
    Publication Date: 2024-02-07
    Description: Ocean warming and acidification will be most pronounced in the Arctic. Both phenomena severely threat thecosome pteropods (holoplanktonic marine gastropods) by reducing their survival (warming) and causing dissolution of their aragonitic shell (acidification). Lipids, particularly phospholipids, play a major role in veligers and juveniles of the polar thecosome pteropod \textit{Limacina helicina} (Phipps 1774) comprising over two thirds of their total lipids. Membrane lipids (phospholipids) are important in temperature acclimation of ectotherms. Hence, we experimentally investigated ocean warming and acidification effects on total lipids, lipid classes and fatty acids of Arctic early-stage \textit{L. helicina}. Temperature and pCO\textsubscript{2} treatments chosen resembled Representative Concentration Pathway model scenarios for this century. We found a massive decrease of total lipids at elevated temperature and at the highest CO\textsubscript{2} concentration (1100 $\mu$atm) of the \textit{in situ} temperature. Clearly, temperature was the overriding factor. Total lipids were reduced by 47--70\%, mainly caused by a reduction of phospholipids by up to 60\%. Further, based on pH\textsubscript{T} development in the incubation water of pteropods during the experiment, some evidence exists for metabolic downregulation (shutdown?) in pteropods at high factor levels of temperature and pCO\textsubscript{2}. Consequently, cell differentiation and energy balance of early-stage larvae was probably severely compromised. Comparison of our experimental with 'wild' organisms suggests phospholipid reduction to values clearly outside natural variability. Based on the well-known significance of phospholipids for membranogenesis, early development, and reproduction, negative warming effects on such a basal metabolic function may be a much more immediate threat for pteropods than so far anticipated shell dissolution effects due to acidification.
    Type: Article , PeerReviewed
    Format: text
    Format: text
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    OceanRep: Article in a Scientific Journal - peer-reviewed
  • 6
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    Lipid dynamics of Arctic pteropods (Limacina spp., Thecosomata) in response to ocean warming and acidification during a seven day incubation experiment (2021)
    PANGAEA
    Details
    Publication Date: 2023-07-18
    Description: This dataset contains the results of a lab experiment performed in Ny Ålesund (Arctic, Svalbard, 78° 55′ N, 11° 56′ O) from 22.–29. August 2013. We collected early-stage thecosome pteropods (Limacina spp.) in Kongsfjord to investigate the response of their lipid metabolism (response variables: total lipids, lipid classes, fatty acids, fatty alcohols) to ocean warming and acidification (OWA). Pteropods were collected on August 21 with a 100 µm plankton net (0.2 square meter mouth opening, 1 L cod end) integrated from 300 m depth in Kongsfjord. The OWA experiment was designed to cover end-of the century projections for temperature and pCO2 and included two temperature treatments (3.5°C = mean in situ temperature averaged over the depth range where pteropods where collected from, and 5.5°C resembling a 2°C temperature increase projected for the Arctic Ocean in the upper 100-200 m, Steinacher et al. 2009, https://doi.org/10.5194/bg-6-515-2009) and three pCO2 levels chosen according to the RCP 8.5 scenario (present day = 400 µatm, year 2080 = 750 µatm, and 〉2100 = 1100 µatm). Temperature treatments were realized in temperature controlled rooms. pCO2 levels were established by bubbling filtered seawater (20 µm filtered) with Wösthoff gas mixing pumps (Wösthoff, Germany). For each treatment level six replicates (one vessel á 300 ml = one experimental unit = one replicate) were established with 200 incubated early-stage pteropods (ca. 300 µm shell length of individual pteropods). To assure that oxygen concentrations in the vessels did not fall below critical saturation levels of oxygen partial pressure for marine mollusks due to respiration of the incubated pteropods, the experimental seawater was changed regularly. Along with the analyzed lipid data, this dataset also includes the carbonate chemistry data of the perturbed experimental seawater and of that in the experimental units (start/end measurements as well as pH development in the experimental units).
    Keywords: Arctic; Limacina; lipids; Ocean acidification; ocean warming; pteropods; Thecosomata
    Type: Dataset
    Format: application/zip, 2 datasets
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    DATA PANGAEA
  • 7
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    Fatty acid composition, ice chemistry and algae biomass during an Arctic sea ice algal bloom on landfast ice near the settlement of Svea, in Van Mijenfjorden, Spitsbergen (2020)
    PANGAEA
    Details
    Publication Date: 2024-01-09
    Description: The relative importance of sea ice algal-based production is often vital for studies about climate change impacts on Arctic marine ecosystems. The relevance of sea ice algal production for different parts of the polar ecosystem, ranging from key pelagic grazers to mammals and assessing the overall strength of sympagic-pelagic or sympagic-benthic coupling has been extensively studied. The key interest in all these studies is quantifying the relative importance of biomass produced by sea ice algae (as opposed to phytoplankton) for higher trophic level production. Different types of trophic markers are widely applied to analyse food web structure, based on numerous assumptions of how sea ice algae differ biochemically from phytoplankton. Several types of lipid biomarkers and stable isotope ratios are widely used for tracing sea ice associated (sympagic) vs. pelagic particulate organic matter (POM) in marine food webs. Beside the typical proximate data (POC, Chl-a, DIC, Biomass), we analysed fatty acids, highly branched isoprenoids (HBIs), stable isotope ratios of particulate organic carbon (POC) (δ13C), as well as δ13C of selected marker fatty acids during an Arctic sea ice algal bloom, focusing on spatial and temporal variability. Sampling was conducted on landfast ice near the settlement of Svea, in Van Mijenfjorden, Spitsbergen from 7 April to 5 May. A sea ice observatory was installed close to the deepest part of the inner basin on 8th of March providing background data for the entire study period on sea ice thickness, snow cover, and transmittance. Sea ice algal development was followed by sampling different stations in the inner basin from early March to early May 2017, including a spatial distribution along a transect starting from a very shallow station close to the shore (IS) to the mid-fjord station VMF2. The aim of our study was to document the spatial and temporal variability of different lipid and stable isotope-based trophic markers during an ice algal spring bloom and relate it to environmental conditions, as well as taxonomic composition. We then use these data to compare and contrast the reliability of each approach to distinguish between sympagic and pelagic POM.
    Keywords: bulk and compound-specific isotope analysis; FAABulous; FAABulous: Future Arctic Algae Blooms and their role in the context of climate change; fatty acid; highly branched isoprenoid (HBI); H-Print; IP25; Lipid; stable isotope ratio; Trophic marker
    Type: Dataset
    Format: application/zip, 7 datasets
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    DATA PANGAEA
  • 8
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    Stable carbon isotope ratios of selected fatty acid markers during an Arctic sea ice algal bloom on landfast ice and in water near the settlement of Svea, in Van Mijenfjorden, Spitsbergen (2020)
    PANGAEA
    Details
    Publication Date: 2024-01-31
    Keywords: 6,9,12,15-Hexadecatetraenoic acid, δ13C; all-cis-4,7,10,13,16,19-Docosahexaenoic acid, δ13C; all-cis-5,8,11,14,17-Eicosapentaenoic acid, δ13C; AWI Arctic Land Expedition; bulk and compound-specific isotope analysis; cis-11-Octadecenoic acid, δ13C; cis-9-Hexadecenoic acid, δ13C; cis-9-Octadecenoic acid, δ13C; Core; DATE/TIME; Depth, bottom/max; DEPTH, ice/snow; Depth, top/min; DEPTH, water; Device type; Elevation of event; Event label; FAAB1703_MS-2; FAAB1703_VMF3; FAAB1703_VMF9; FAAB1704_IM; FAAB1704_IS; FAAB1704_MS; FAAB1704_VMF1-2; FAAB1704_VMF1b; FAAB1704_VMF2-2; FAAB1704_VMF2b; FAAB1704_VMF5; FAABulous; FAABulous: Future Arctic Algae Blooms and their role in the context of climate change; FAABulous2017; fatty acid; Hexadecanoic acid, δ13C; highly branched isoprenoid (HBI); H-Print; IM; IP25; IS; Latitude of event; Lipid; Longitude of event; MS; Octadecanoic acid, δ13C; Sample ID; SEAICEC; Sea ice corer; Snow type; stable isotope ratio; Station label; Svalbard; Tetradecanoic acid, δ13C; Trophic marker; VMF1; VMF2; VMF3; VMF5; VMF9; Water sample; WS
    Type: Dataset
    Format: text/tab-separated-values, 740 data points
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    DATA PANGAEA
  • 9
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    Concentration of highly branched isoprenoids (HBI) during an Arctic sea ice algal bloom on landfast ice and in water near the settlement of Svea, Van Mijenfjorden, Spitsbergen (2020)
    PANGAEA
    Details
    Publication Date: 2024-01-31
    Keywords: (9E)-2,6,10,14-Tetramethyl-7-(3-methylpent-4-enyliden)pentadeca-9-ene per filtration volume; (9Z)-2,6,10,14-Tetramethyl-7-(3-methylpent-4-enyliden)pentadeca-9,13-diene; (9Z)-2,6,10,14-Tetramethyl-7-(3-methylpent-4-enyliden)pentadeca-9-ene per filtration volume; 2,10,14-Trimethyl-6-enyl-7-(3-methylpent-4-enyl)pentadecane per filtration volume; 2,6,10,14-Tetramethyl-7-(3-methylpent-4-enyl)pentadeca-5,9,13-triene; 2,6,10,14-Tetramethyl-7-(3-methyl-pent-4-enyl)pentadeca-5E,9E-diene; 2,6,10,14-Tetramethyl-7-(3-methylpent-4-enyl)pentadecane per filtration volume; 2,6,10,14-Tetramethyl-7-(3-methylpent-4-enyliden)pentadeca-2,9-diene; 2,6,10,14-Tetramethyl-7-(3-methylpent-4-enyliden)pentadecan; AWI Arctic Land Expedition; bulk and compound-specific isotope analysis; Core; DATE/TIME; Depth, bottom/max; DEPTH, ice/snow; Depth, top/min; DEPTH, water; Device type; ELEVATION; Elevation of event; Event label; FAAB1703_MS-2; FAAB1703_VMF3; FAAB1703_VMF9; FAAB1704_IM; FAAB1704_IS; FAAB1704_MS; FAAB1704_VMF1-2; FAAB1704_VMF1b; FAAB1704_VMF2-2; FAAB1704_VMF2b; FAAB1704_VMF5; FAABulous; FAABulous: Future Arctic Algae Blooms and their role in the context of climate change; FAABulous2017; fatty acid; For abbreviation of HBIs refer to Brown et al. 2014; highly branched isoprenoid (HBI); Highly branched isoprenoid alkanes, C25 total; H-Print; IM; IP25; IS; Latitude of event; Lipid; Longitude of event; MS; Sample ID; SEAICEC; Sea ice corer; Snow type; stable isotope ratio; Station label; Svalbard; Trophic marker; VMF1; VMF2; VMF3; VMF5; VMF9; Water sample; WS
    Type: Dataset
    Format: text/tab-separated-values, 680 data points
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    DATA PANGAEA
  • 10
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    Concentration of fatty acids (FAME) during an Arctic sea ice algal bloom on landfast ice and in water near the settlement of Svea, Van Mijenfjorden, Spitsbergen (2020)
    PANGAEA
    Details
    Publication Date: 2024-01-31
    Keywords: 11-Icosenoic acid; 6,9,12,15-Hexadecatetraenoic acid; 6,9,12,15-Octadecatetraenoic acid; 6,9,12-Hexadecatrienoic acid; 9,12,15-Octadecatrienoic acid; 9,12-Hexadecadienoic acid; all-cis-4,7,10,13,16,19-Docosahexaenoic acid; all-cis-5,8,11,14,17-Eicosapentaenoic acid; all-cis-9,12-Octadecadienoic acid; AWI Arctic Land Expedition; bulk and compound-specific isotope analysis; cis-11-Octadecenoic acid; cis-9-Hexadecenoic acid; cis-9-Octadecenoic acid; Core; DATE/TIME; Depth, bottom/max; DEPTH, ice/snow; Depth, top/min; Device type; ELEVATION; Elevation of event; Event label; FAAB1704_IM; FAAB1704_IS; FAAB1704_MS; FAAB1704_VMF1b; FAAB1704_VMF2b; FAABulous; FAABulous: Future Arctic Algae Blooms and their role in the context of climate change; FAABulous2017; fatty acid; Fatty acids, total; Fatty acids per unit mass particulate organic carbon; Hexadecanoic acid; highly branched isoprenoid (HBI); H-Print; IM; IP25; IS; Latitude of event; Lipid; Longitude of event; MS; Octadecanoic acid; Sample ID; SEAICEC; Sea ice corer; Snow type; stable isotope ratio; Station label; Svalbard; Tetradecanoic acid; Trophic marker; VMF1; VMF2
    Type: Dataset
    Format: text/tab-separated-values, 768 data points
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    DATA PANGAEA
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