Hyperspectral Mineral Identification using SVM and SOM

Remote sensing techniques involving hyperspectral imagery have applications in a number of sciences that study some aspects of the surface of the planet. The analysis of hyperspectral images is complex because of the large amount of information involved and the noise within that data. Investigating images with regard to identify minerals, rocks, vegetation and other materials is an application of hyperspectral remote sensing in the earth sciences. This thesis evaluates the performance of two classification and clustering techniques on hyperspectral images for mineral identification. Support Vector Machines (SVM) and Self-Organizing Maps (SOM) are applied as classification and clustering techniques, respectively. Principal Component Analysis (PCA) is used to prepare the data to be analyzed. The purpose of using PCA is to reduce the amount of data that needs to be processed by identifying the most important components within the data. A well-studied dataset from Cuprite, Nevada and a dataset of more complex data from Baffin Island were used to assess the performance of these techniques. The main goal of this research study is to evaluate the advantage of training a classifier based on a small amount of data compared to an unsupervised method. Determining the effect of feature extraction on the accuracy of the clustering and classification method is another goal of this research. This thesis concludes that using PCA increases the learning accuracy, and especially so in classification. SVM classifies Cuprite data with a high precision and the SOM challenges SVM on datasets with high level of noise (like Baffin Island).

Rooibos tea flavonoids increase mineral content in human osteoblast-like cells

Some cross-sectional and prospective studies have demonstrated a positive correlation between habitual tea consumption and bone mineral density in post-menopausal women. Rooibos tea contains no caffeine and is a rich source of flavonoids such as rutin, orientin, hyperoside and luteolin. These flavonoids have similar structures to estradiol, and therefore may act as estrogen mimics to promote favourable outcomes in bone. The overall objective of this research was to identify flavonoids that could enhance mineral content in human osteoblast Saos2 cells. Mineral was quantified by alizarin red staining and characterized by quantifying alkaline phosphatase (ALP) activity, cell mitochondria activity and toxicity, in addition to changes in regulatory markers of osteoblastic activity. Rutin (≥50μM), hyperoside (≥5.0μM), orientin (0.1μM-1.0μM, 15μM-100μM) and luteolin (5.0μM) enhanced mineral content. This was in part due to elevated ALP and mitochondrial activity, and lower toxicity, pro-inflammatory cytokines, and Wnt inhibitors.

The effect of 17-B estradiol therapy on bone mineral density and structure of alveolar bone in the ovariectomized rat model of postmenopausal osteoporosis

The ovariectomized (OVX) rat, a preclinical model for studying postmenopausal bone loss, may also be used to study differences in alveolar bone (AB). The objectives of this study were to quantify the differences in AB following estrogen replacement therapy (ERT), and to investigate the relationship between AB structure and density, and trabecular bone at the femoral neck (FN) and third lumbar vertebral body (LB3). Estrogen treated rats had a higher bone volume fraction (BV/TV) at the AB region (9.8% P < 0.0001), FN (12% P < 0.0001), and LB3 (11.5% P < 0.0001) compared to the OVX group. BV/TV of the AB was positively correlated with the BV/TV at the FN (r = 0.69 P < 0.0001) and the LB3 (r = 0.75 P < 0.0001). The trabecular number (Tb.N), trabecular separation (Tb.Sp), and structure model index (SMI) were also positively correlated (P < 0.05) between the AB and FN (r = 0.42, 0.49, and 0.73, respectfully) and between the AB and LB3 (r = 0.44, 0.63, and 0.69, respectfully). Given the capacity of AB to respond to ERT, future preclinical drug/nutritional intervention studies aimed at improving skeletal health should include the AB as a region of interest (ROI).

Alelos del gen del receptor de la vitamina D y su relación con la densidad mineral osea.

Tesis (Maestría en Ciencias con Especialidad en Biología Molecular e Ingeniería Genética) UANL

Estudio comparativo de reducción carbotérmica de mineral de hierro utilizando microondas [por] María Idalia del Consuelo Gómez de la Fuente

Tesis (Maestría en Ciencias de la Ingeniería Mecánica con Especialidad en Materiales) U.A.N.L.

Determinación de trazas de elementos en mineral de tungsteno por el metodo de analis por activacion de neutrones

Tesis (Maestria en Ciencias con especialidad de Ingenieria nuclear) U.A.N.L

Sistema productivo del carbón mineral y sus residuos

Tesis (Maestro en Ciencias de la Administración con Especialidad en Sistemas) UANL, 1999.

Asociación de la densidad mineral ósea con el polimorfismo taql del gen del receptor de la vitamina D y el consumo de cafeína en mujeres jóvenes.

Tesis (Maestría en Ciencias en Nutrición) UANL, 2011.

Asociación de los polimorfismos Bsml, Taql y Apal del gen VDR con la densidad mineral ósea y riesgo a fracturas.

Tesis (Maestría en Ciencias en Nutrición) UANL, 2013.

Asociación de los polimorfismos de los genes MEF2C, JAG1 y BDNF con densidad mineral ósea en mujeres de 40 a 80 años.

Tesis (Maestría en Ciencias en Nutrición) UANL, 2014.

Asociación de las variantes alélicas de los genes del receptor de estrógeno 1 (ESR1) y C6orf97 con densidad mineral ósea en mujeres de 40 a 80 años.

Tesis (Maestría en Ciencias en Nutrición) UANL, 2014.

Suplementación mineral del ganado en pastoreo [por] Jorge R. Kawas, Gilberto Armienta [y] José J. Kawas

UANL

DETALL de la acción que el día 20 de octubre de 1961 la bri gada mixta del mando del ciudadano general Santiago Tapia libró en la sierra intermedia de Pachuca al mineral del monte,derrotado al ejercito reaccionario al mando de sus principales caudillos marquez, Mejía, Zuloaga, Zires, Guerrero, Herrea y Lozada.

UANL

Trade Creation, Trade Diversion and Investment Flows: Evidence from the Canada-Chile Free Trade Agreement.

Rapport de recherche

The role of investment specific technological shocks in explaining macroeconomics fluctuations.

Rapport de recherche