Contiguity in discriminant factorial analysis for image clustering

1994 ◽  
pp. 602-609
Author(s):  
L. Abdessemed ◽  
B. Escofier
Keyword(s):  
Factorial Analysis ◽  
Image Clustering ◽  
Discriminant Factorial Analysis

scholarly journals Inheritance and Heritability of Resistance to Citrus Leprosis

2006 ◽  
Vol 96 (10) ◽  
pp. 1092-1096 ◽  
Author(s):  
Marinês Bastianel ◽  
Antonio Carlos de Oliveira ◽  
Mariângela Cristofani ◽  
Oliveiro Guerreiro Filho ◽  
Juliana Freitas-Astúa ◽  
...  
Keyword(s):  
Principal Component Analysis ◽  
Growth Parameters ◽  
Block Design ◽  
Principal Component ◽  
Component Analysis ◽  
Factorial Analysis ◽  
Inheritance Of Resistance ◽  
Measured Variable ◽  
Citrus Leprosis ◽  
Discriminant Factorial Analysis

The genetic inheritance of resistance to leprosis, the most important viral disease of citrus in Brazil, was characterized through the phenotypic assessment of 143 hybrids resulting from crosses between tangor ‘Murcott’ (Citrus sinensis × C. reticulata) and sweet orange ‘Pêra’ (C. sinensis), considered to be resistant and susceptible to the disease, respectively. All plants were grafted onto Rangpur lime (C. limonia) and inoculated with Citrus leprosis virus, cytoplasmic type through the infestation with viruliferous mites, Brevipalpus phoenicis. The experiments were arranged in a completely randomized block design with 10 replicates. Incidence and severity of the disease in leaves and stems as well as plant growth parameters (plant height and stem diameter) were recorded for 3 years after the infestation with the viruliferous mites. The average values of all variables were analyzed using principal component analysis, discriminant factorial analysis, estimation of the clonal repeatability coefficients, and frequency of the distributions of the average values for each measured variable. The principal component analysis resulted in the identification of at least two groups with resistance and susceptibility to leprosis, respectively. About 99% of all hybrids were correctly classified according to the discriminant factorial analysis. The broad-sense heritability coefficients for characteristics associated with incidence and severity of leprosis ranged from 0.88 to 0.96. The data suggest that the inheritance of resistance to leprosis may be controlled by only a few genes.

Classification of Selected Essential Oil from Family Zingiberaceae Using E-Nose and Discriminant Factorial Analysis (DFA) Techniques: An Initial Study

2015 ◽  
Vol 799-800 ◽  
pp. 932-936 ◽  
Author(s):  
Sahrim Lias ◽  
Nor Azah Mohamad Ali ◽  
Mailina Jamil ◽  
Azrina Aziz ◽  
Siti Humeirah Ab Ghani ◽  
...  
Keyword(s):  
Pattern Recognition ◽  
Statistical Analysis ◽  
Essential Oils ◽  
Initial Study ◽  
Factorial Analysis ◽  
Extraction Techniques ◽  
Aromatic Plant ◽  
P Values ◽  
Discriminant Factorial Analysis

Essential oils are very valuable natural resources and considered as secondary metabolites. They are produced from several parts of aromatic plant by using different type of extraction techniques. Each technique produced slightly different output oil yield and smell however they produced the same major chemicals compound markers when they are analysed using chemical analysis and profiling technique. Pure essential oils are known to have very strong odor and there are several techniques used to differentiate the volatile odor generated. In this study, Electronic Nose (E-Nose) technology is used to distinguish the smell among 8 samples selected within the same Zingiberaceae family. Their pattern recognition profiles were examined by statistical analysis using Discriminant Factorial Analysis (DFA). The result shows that the E-Nose technology combined with DFA were successfully discriminating all 8 samples within the same family with significant p-values < 0.05 across all samples and 100% recognition value.

Appropriation des Savoirs et Mémoire Collective

2013 ◽  
Vol 72 (2) ◽  
pp. 71-78
Author(s):  
Sophie Richardot
Keyword(s):  
Collective Memory ◽  
Factorial Analysis ◽  
Experimental Results ◽  
Ancient History ◽  
Historical Events ◽  
Memoire Collective ◽  
Obedience To Authority

The aim of this study is to understand to what extent soliciting collective memory facilitates the appropriation of knowledge. After being informed about Milgram’s experiment on obedience to authority, students were asked to mention historical or contemporary events that came to mind while thinking about submission to authority. Main results of the factorial analysis show that the students who do not believe in the reproducibility of the experimental results oppose dramatic past events to a peaceful present, whereas those who do believe in the reproducibility of the results also mention dramatic contemporary events, thus linking past and present. Moreover, the students who do not accept the results for today personify historical events, whereas those who fully accept them generalize their impact. Therefore, according to their attitude toward this objet of knowledge, the students refer to two kinds of memory: a “closed memory,” which tends to relegate Milgram’s results to ancient history; and an “open memory,” which, on the contrary, transforms past events into a concept that helps them understand the present. Soliciting collective memory may contribute to the appropriation of knowledge provided the memory activated is an “open” one, linking past to present and going beyond the singularity of the event.

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