Search Results - "Pawlowsky‐Glahn, V."

Balances: a New Perspective for Microbiome Analysis by Rivera-Pinto, J, Egozcue, J J, Pawlowsky-Glahn, V, Paredes, R, Noguera-Julian, M, Calle, M L

“…High-throughput sequencing technologies have revolutionized microbiome research by allowing the relative quantification of microbiome composition and function…”
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Compositional data analysis as a robust tool to delineate hydrochemical facies within and between gas‐bearing aquifers by Owen, D. Des. R., Pawlowsky‐Glahn, V., Egozcue, J. J., Buccianti, A., Bradd, J. M.

“…Isometric log ratios of proportions of major ions, derived from intuitive sequential binary partitions, are used to characterize hydrochemical variability…”
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Relative vs. absolute statistical analysis of compositions: A comparative study of surface waters of a Mediterranean river by Otero, N., Tolosana-Delgado, R., Soler, A., Pawlowsky-Glahn, V., Canals, A.

“…Most hydrogeological research includes some sort of statistical study, which is generally conducted on the raw measures of chemical variables, though there are…”
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Logratio Analysis and Compositional Distance by Aitchison, J, Barceló-vidal, C, Martín-fernández, J A, Pawlowsky-glahn, V

“…The concept of distance between two compositions is important in the statistical analysis of compositional data, particularly in such activities as cluster…”
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Composition and discrimination of sandstones; a statistical evaluation of different analytical methods by von Eynatten, Hilmar, Barceló-Vidal, Carles, Pawlowsky-Glahn, Vera

“…The discriminative power of four analytical approaches to sandstone composition is evaluated with respect to the separation of different formations and source…”
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Hilbert Space of Probability Density Functions Based on Aitchison Geometry by Egozcue, J. J., Díaz–Barrero, J. L., Pawlowsky–Glahn, V.

“…The set of probability functions is a convex subset of L^sup 1^ and it does not have a linear space structure when using ordinary sum and multiplication by…”
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Advances in Principal Balances for Compositional Data by Martín-Fernández, J. A., Pawlowsky-Glahn, V., Egozcue, J. J., Tolosona-Delgado, R.

“…Compositional data analysis requires selecting an orthonormal basis with which to work on coordinates. In most cases this selection is based on a data driven…”
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Compositional baseline assessments to address soil pollution: An application in Langreo, Spain by Boente, C., Albuquerque, M.T.D., Gallego, J.R., Pawlowsky-Glahn, V., Egozcue, J.J.

“…Potentially Toxic Elements (PTEs) are contaminants with high toxicity and complex geochemical behaviour and, therefore, high PTEs contents in soil may affect…”
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Groups of Parts and Their Balances in Compositional Data Analysis by Egozcue, J J, Pawlowsky-glahn, V

“…Issue Title: Advances in Compositional Data Amalgamation of parts of a composition has been extensively used as a technique of analysis to achieve reduced…”
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Variation diagrams to statistically model the behavior of geochemical variables: Theory and applications by Buccianti, A., Egozcue, J.J., Pawlowsky-Glahn, V.

“…•New variation diagrams to investigate geochemical processes were proposed.•A new method for evaluates compositional changes was developed.•The method has been…”
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Chronic kidney disease of unknown origin is associated with environmental urbanisation in Belfast, UK by McKinley, Jennifer M., Mueller, Ute, Atkinson, Peter M., Ofterdinger, Ulrich, Cox, Siobhan F., Doherty, Rory, Fogarty, Damian, Egozcue, J. J., Pawlowsky-Glahn, V.

“…Chronic kidney disease (CKD), a collective term for many causes of progressive renal failure, is increasing worldwide due to ageing, obesity and diabetes…”
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Some Basic Concepts of Compositional Geometry by Tolosana-delgado, R, Otero, N, Pawlowsky-glahn, V

“…Issue Title: Advances in Compositional Data…”
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Units Recovery Methods in Compositional Data Analysis by Martín-Fernández, J. A., Egozcue, J. J., Olea, R. A., Pawlowsky-Glahn, V.

“…Compositional data carry relative information. Hence, their statistical analysis has to be performed on coordinates with respect to a log-ratio basis…”
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Some comments on compositional data analysis in archaeometry, in particular the fallacies in Tangri and Wright's dismissal of logratio analysis by Aitchison, J., Barceló-Vidal, C., Pawlowsky-Glahn, V.

“…This comment exposes the fallacies in the Tangri and Wright (1993) dismissal of the methodology of logratio analysis of compositional data as dangerous…”
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Latent Compositional Factors in The Llobregat River Basin (Spain) Hydrogeochemistry by Tolosana-delgado, R, Otero, N, Pawlowsky-glahn, V, Soler, A

“…Issue Title: Advances in Compositional Data The study of hydrogeochemical data sets frequently calls for statistical dimension reducing techniques. It is well…”
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Isometric Logratio Transformations for Compositional Data Analysis by Egozcue, J J, Pawlowsky-glahn, V, Mateu-figueras, G, Barceló-vidal, C

“…Geometry in the simplex has been developed in the last 15 years mainly based on the contributions due to J. Aitchison. The main goal was to develop analytical…”
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The effect of scale in daily precipitation hazard assessment by Egozcue, J. J., Pawlowsky-Glahn, V., Ortego, M. I., Tolosana-Delgado, R.

“…Daily precipitation is recorded as the total amount of water collected by a rain-gauge in 24 h. Events are modelled as a Poisson process and the 24 h…”
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Geometric approach to statistical analysis on the simplex by Pawlowsky-Glahn, V., Egozcue, J. J.

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Dealing with Zeros and Missing Values in Compositional Data Sets Using Nonparametric Imputation by Martín-fernández, J A, Barceló-vidal, C, Pawlowsky-glahn, V

“…The statistical analysis of compositional data based on logratios of parts is not suitable when zeros are present in a data set. Nevertheless, if there is…”
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New Perspectives on Water Chemistry and Compositional Data Analysis by Buccianti, A, Pawlowsky-glahn, V

“…Issue Title: Advances in Compositional Data Water chemistry is commonly investigated to determine the suitability of water for various uses. With increased…”
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