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Application of the hypothesis analysis method using Cohen's Kappa index to measure the agreement between leather sorters / Patricia Casey in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 94, N° 4 (07-08/2010)
[article]
Titre : Application of the hypothesis analysis method using Cohen's Kappa index to measure the agreement between leather sorters Type de document : texte imprimé Auteurs : Patricia Casey, Auteur ; Gustavo Altobelli, Auteur ; Pablo Pignatelli, Auteur Année de publication : 2010 Article en page(s) : p. 144-148 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Automobiles -- Matériaux
Cuirs et peaux -- DéfautsTags : 'Cuir automobile' 'Défauts des surfaces' Evaluation 'Critères de tri' 'Index Kappa Cohen' Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : One of the more sensitive activities carried out in a tannery, because of the impact the results could cause on the customer and on the tannery's business is, certainly, the sorting or grading of the hides in the different stages (wet blue or wet white, crust and finished). The surface defects affect the aesthetics appearance of leather and leather goods as well as the usable area. If the grade assigned to a hide by a sorter is lower than the one it really is, according to the agreement with the customer it will cause economical damage to the tannery. On the other hand, if the grade assigned is higher than the one it really is, the customer will be disappointed and claim. The detection of defects on the surface of natural materials such as leather is a difficult task because of the variety of shapes and textures, as well as in the quality and quantity of defective areas. The most common method applied in the leather industry to sort or grade hides is visual inspection. Notwithstanding the sorting or grading criteria could be well defined and agreed between the tannery and the customer, we can always wonder: if we change from one sorter to another, which will be the concordance level existing between them? In other words, how far the sorters will coincide on their evaluation? Will the result be a real or random one? Due to the variability between two or more sorters which is traditionally recognized as an important source of mistakes, from our point of view, it would be very useful to transform an attribute analysis into a variable one. The tanneries that supply leather to the automotive companies have to certify their Quality System according to QS 9000 or ISO/TS 16949. One of the requirements in that norm and technical specification is to apply the Automotive Industry Action Group (AIAG) reference Manual "Measurement Systems Analysis" which describes the study of the measurement systems by attributes. In this paper, we describe the practical way on which the agreement between sorters is measured and the application of the hypothesis analysis method, cross tabulation, calculating Kappa coefficient initially proposed by Cohen, which is a statistical concordance rating measure for qualitative (categorical items) between two sorters. En ligne : https://drive.google.com/file/d/1qXL_GNqU5y1ahjug61SvgZKc9UK5pxYc/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=9856
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 94, N° 4 (07-08/2010) . - p. 144-148[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 012384 - Périodique Bibliothèque principale Documentaires Disponible Formulating for efficacy / Johann W. Wiechers in IFSCC MAGAZINE, Vol. 7, N° 1 (01-02-03/2004)
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Titre : Formulating for efficacy Type de document : texte imprimé Auteurs : Johann W. Wiechers, Auteur ; Caroline L. Kelly, Auteur ; Trevor G. Blease, Auteur ; J. Chris Dederen, Auteur Année de publication : 2004 Article en page(s) : p. 13-20 Note générale : Bibliogr. Langues : Anglais (eng) Tags : 'Ingredients actifs' 'Profils de distribution peau' 'Sélection d'émollients' 'Index relatif polarité' 'Système livraison' 'Conception formulation' 'Coefficient cloison d'octanol/eau' Index. décimale : 668.5 Parfums et cosmétiques Résumé : Active ingredients have been around in cosmetics for a long time but have they really resulted in active cosmetic products? In order to achieve this, the right ingredient needs to be delivered to the right location at the right concentration for the correct period of time and the extent (and therefore the concentration) of this delivery depends on the formulation.
From a rather theoretical approach based on the polarity of the active ingredient, the stratum corneum and the oil phase, the relative polarity index was established that enables the selection of a suitable emollient for ensuring skin penetration of the active ingredient. Practical examples subsequently show the validity of this approach that demonstrates that one can regulate the delivery of an active molecule (and therefore the efficacy of a cosmetic formulation) by selection and control of the emollient system. Cosmetic formulations are generally quite complex mixtures and subsequent experiments using different emulsifier systems indicated that this component of a cosmetic formulation could also have an impact on steering the active ingredient to the right layer of the skin, although it is too early to be able to derive general rules from this.Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=10541
in IFSCC MAGAZINE > Vol. 7, N° 1 (01-02-03/2004) . - p. 13-20[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 003882 - Périodique Bibliothèque principale Documentaires Disponible Optical whitening of cationised cotton : effect on whiteness and whiteness tint / Mustafa Tutak in COLORATION TECHNOLOGY, Vol. 127, N° 5 (2011)
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Titre : Optical whitening of cationised cotton : effect on whiteness and whiteness tint Type de document : texte imprimé Auteurs : Mustafa Tutak, Auteur Année de publication : 2011 Article en page(s) : p. 340-345 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Agents de blanchiment
CotonLe coton est une fibre végétale qui entoure les graines des cotonniers "véritables"(Gossypium sp.), un arbuste de la famille des Malvacées. Cette fibre est généralement transformée en fil qui est tissé pour fabriquer des tissus. Le coton est la plus importante des fibres naturelles produites dans le monde. Depuis le XIXe siècle, il constitue, grâce aux progrès de l'industrialisation et de l'agronomie, la première fibre textile du monde (près de la moitié de la consommation mondiale de fibres textiles).Tags : 'Blanchiment coton' 'Index blanchiment' optique' Cationisation Index. décimale : 667.3 Teinture et impression des tissus Résumé : In this study, the effect of cationisation on optical whitening was examined. For this purpose, the whiteness index and whiteness tint of optically whitened pre-cationised knitted cotton fabrics were analysed. The cationisation and optical whitening processes were carried out under different concentration levels, using the exhaustion method. The whiteness index and whiteness tint were calculated after colour measurements were taken. The experimental results were also analysed statistically using ANOVA. The whiteness index obtained from cationised fabric was lower than that of non-cationised fabrics. While the whiteness tint of cationised cotton fabric had a blue to greenish nuance, the non-cationised fabric had a reddish nuance. Note de contenu : - Fabric and chemicals
- Cationisation and optical whitening process
- Colour measurements
- Statistical model
DOI : 10.1111/j.1478-4408.2011.00320.x En ligne : http://onlinelibrary.wiley.com/doi/10.1111/j.1478-4408.2011.00320.x/pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=12186
in COLORATION TECHNOLOGY > Vol. 127, N° 5 (2011) . - p. 340-345[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 13324 - Périodique Bibliothèque principale Documentaires Disponible