Search Results - "Esbensen, Kim"
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Principles of Proper Validation: use and abuse of re-sampling for validation
Published in Journal of chemometrics (01-03-2010)“…Validation in chemometrics is presented using the exemplar context of multivariate calibration/prediction. A phenomenological analysis of common validation…”
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Journal Article Conference Proceeding -
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Monitoring of anaerobic digestion processes: A review perspective
Published in Renewable & sustainable energy reviews (01-08-2011)“…The versatility of anaerobic digestion (AD) as an effective technology for solving central challenges met in applied biotechnological industry and society has…”
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Before reliable near infrared spectroscopic analysis - the critical sampling proviso. Part 2: Particular requirements for near infrared spectroscopy
Published in Journal of Near Infrared Spectroscopy (01-12-2022)“…Non-representative sampling of materials, lots and processes intended for NIR analysis is often fraught with hidden contributions to the full Measurement…”
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Book Review Journal Article -
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Before reliable near infrared spectroscopic analysis - the critical sampling proviso. Part 1: Generalised theory of sampling
Published in Journal of Near Infrared Spectroscopy (01-12-2022)“…Non-representative sampling of materials, lots and processes intended for near infrared (NIR) analysis is often contributing hidden additions to the full…”
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Book Review Journal Article -
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Revisiting Pierre Gy's formula (TOS) – A return to size-density classes for applications to contaminated soils, coated particular aggregates and mixed material systems
Published in Analytica chimica acta (08-02-2022)“…For some real-world material systems, estimations of the incompressible sampling variance based on Gy's classical s2(FSE) formula from the Theory of Sampling…”
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Transition to circular economy requires reliable statistical quantification and control of uncertainty and variability in waste
Published in Waste management & research (01-12-2016)Get full text
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Sampling of particulate materials with significant spatial heterogeneity - Theoretical modification of grouping and segregation factors involved with correct sampling errors: Fundamental Sampling Error and Grouping and Segregation Error
Published in Analytica chimica acta (21-02-2019)“…There has been an extensive abuse of Gy's Formula during the entire history of applied TOS (Theory of Sampling), it being applied too liberally to almost any…”
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Journal Article -
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Materials properties: heterogeneity and appropriate sampling modes
Published in Journal of AOAC International (01-03-2015)“…The target audience for this Special Section comprises parties related to the food and feed sectors, e.g., field samplers, academic and industrial scientists,…”
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Journal Article -
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Theory of sampling: four critical success factors before analysis
Published in Journal of AOAC International (01-03-2015)“…Food and feed materials characterization, risk assessment, and safety evaluations can only be ensured if QC measures are based on valid analytical data,…”
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Journal Article -
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Evaluation of sampling systems in iron ore concentrating and pelletizing processes – Quantification of Total Sampling Error (TSE) vs. process variation
Published in Minerals engineering (15-01-2018)“…•Regular control of sampling variability through variographic characterization.•Variographic analysis of process data enable evaluation of sampling…”
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Adequacy and verifiability of pharmaceutical mixtures and dose units by variographic analysis (Theory of Sampling) – A call for a regulatory paradigm shift
Published in International journal of pharmaceutics (29-02-2016)“…[Display omitted] In spite of intense efforts in the last 20 years, the current state of affairs regarding evaluation of adequacy of pharmaceutical mixing is…”
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Journal Article -
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Representative sampling for food and feed materials: a critical need for food/feed safety
Published in Journal of AOAC International (01-03-2015)Get full text
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Representative sampling of large kernel lots I. Theory of Sampling and variographic analysis
Published in TrAC, Trends in analytical chemistry (Regular ed.) (01-02-2012)“…► Kernel lot, trace constituents sampling errors outweighs analytical errors by factors 10–100. ► Contemporary kernel lots uniformity assumptions are…”
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Journal Article -
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FTIR Spectroscopy for Grape and Wine Analysis
Published in Analytical chemistry (Washington) (01-03-2008)Get full text
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Variographic analysis: A new methodology for quality assurance of pharmaceutical blending processes
Published in Computers & chemical engineering (08-05-2019)“…•Developed a NIR calibration model to predict low heterogeneity blends in 1-D sampling system.•Variographic characterization offers a possibility to not only…”
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Journal Article -
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Distributional assumptions in food and feed commodities- development of fit-for-purpose sampling protocols
Published in Journal of AOAC International (01-03-2015)“…Material heterogeneity influences the effectiveness of sampling procedures. Most sampling guidelines used for assessment of food and/or feed commodities are…”
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Journal Article -
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Representative sampling of large kernel lots II. Application to soybean sampling for GMO control
Published in TrAC, Trends in analytical chemistry (Regular ed.) (01-02-2012)“…► KeLDA data are here re-interpreted w.r.t. the Theory of Sampling (TOS). ► KeLDA data subjected to proper variographic analysis and interpretation. ► Total…”
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Journal Article -
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Variographic Assessment of Total Process Measurement System Performance for a Complete Ore-to-Shipping Value Chain
Published in Minerals (Basel) (01-07-2018)“…Variographic characterisation has been shown to be a powerful tool to assess the performance of process measurement systems, using existing process data…”
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Journal Article -
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Representative sampling for reliable data analysis: Theory of Sampling
Published in Chemometrics and intelligent laboratory systems (28-05-2005)“…The Theory of Sampling (TOS) provides a description of all errors involved in sampling of heterogeneous materials as well as all necessary tools for their…”
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Journal Article -
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Representative sampling of large kernel lots III. General considerations on sampling heterogeneous foods
Published in TrAC, Trends in analytical chemistry (Regular ed.) (01-02-2012)“…► Definition of salient characteristics of “fit-for-purpose” sampling plans. ► Minimum no. of increments to counteract maximum heterogeneity kernel lots is 42…”
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Journal Article