An intensity-based texture segmentation approach for the detection of regions with abnormal texture characteristics in magnetic resonance imaging is presented. Our algorithm is tested over several ...images taken from The Parkinson's Progression Markers Initiative (PPMI-database), and the results suggest that this approach is suitable for the successful identification and extraction of regions of interest whose properties can be potentially related to signature features of Parkinson disease.
Characterization of the thermal decomposition of polyurethane (PUR) foams was performed by Fourier-transformed infrared (FT-IR) spectroscopy and thermogravimetric analysis (TGA). Three main weight ...loss paths were observed by TGA, the residue being lower than 3 wt.% for 3 different PUR foams analyzed. FT-IR spectra indicated CO2, CO, NH3 and isocyanides as main decomposition products. PUR foams of different cell sizes were immersed in a slurry of the parent glass ceramic of composition Li2O-ZrO2-SiO2-Al 2O3 (LZSA) and submitted to heat treatment. The LZSA cellular glass ceramics obtained after sintering and crystallization resembled the original morphology of the PUR foams.
The aims of this study were to: 1. Define our criteria and the results obtained in the surgical management of multinodular goiter (MNG); 2. Compare the results of partial thyroidectomies with those ...of total thyroidectomies; 3. Determine the incidence of "hidden" carcinomas diagnosed as MNG; 4. Define the most suitable treatment of MNG.
We performed a retrospective study (1999-2005) of 190 patients with MNG. Clinical characteristics, the diagnostic procedures used, surgical indications, the strategy employed, and biopsy results were analyzed. Overall morbidity and mortality were evaluated and statistical comparison of the morbidity-mortality rate between partial and total thyroidectomies was performed.
Depending on the patients, diagnostic procedures consisted of ultrasonography, gammagraphy, computed tomography, and fine-needle aspiration (FNA). Surgical indication was established by compressive syndrome, endothoracic prolongation, rapid growth, suspected malignancy, nodular hyperthyroidism, the endocrinologist's criteria, and the patient's wishes. The surgical strategy showed a change in favor of radical surgery. The most common histologic diagnosis was nodular hyperplasia, but 16 carcinomas were "hidden" under a diagnosis of MNG (8.5%). There was no mortality. Morbidity, however, did exist, with the poorest results, showing statistically significant differences, occurring in total thyroidectomies.
1. Ultrasonography and FNA were routinely used for diagnosis. Surgical treatment tended to be radical. We believe that identification of recurrences and parathyroid disease is mandatory; 2. Morbidity was greater with total thyroidectomy; 3. Of patients who underwent surgery for MNG, 8.5% had a hidden thyroid carcinoma; 4. With certain limitations, total thyroidectomy is the most suitable therapy.
Thanks to parallel processing, it is possible not only to reduce code runtime but also energy consumption once the workload has been adequately distributed among the available cores. The current ...availability of heterogeneous architectures including GPU and CPU cores with different power-performance characteristics and mechanisms for dynamic voltage and frequency scaling does, in fact, pose a new challenge for developing efficient parallel codes that take into account both the achieved speedup and the energy consumed. This paper analyses the energy consumption and runtime behavior of a parallel master-worker evolutionary algorithm according to the workload distribution between GPU and CPU cores and their operation frequencies. It also proposes a model that has been fitted using multiple linear regression and which enables a workload distribution that considers both runtime and energy consumption by means of a cost function that suitably weights both objectives. Since many useful bioinformatics and data mining applications are tackled by programs with a similar profile to that of the parallel master-worker procedure considered here, the proposed energy-aware approach could be applied in many different situations.
El coque es un material sólido, combustible y poroso, producto de la calcinacion en ausencia de oxigeno de algunos tipos de carbón mineral. Se utiliza en la producción de fundición, arrabio, acero y ...carburo de calcio, tambien sirve como material de empaque en la produccion de ánodos y conductor para descargas eléctricas.La producción de coque en Colombia se realiza principalmente en hornos tipo colmena debeido a los bajos costos de inversíon.(ver tabla 1)Esta tecnoligía de producción es altamente contaminante, y no utiliza la enorme cantidad de energía que se produce durante la coquización.las nuevas disposiciones ambientales y el interés de la empresa Colombiana del Carbón(ECOCARBON) por presentar a los industriales del país alternativas de solución que permitan disponer de la tecnología limpia en la producción de Coque de baja inversión, utilización de la energía de los gases y mejoramientos de la competitividad, hicieron posible a la universidad Francisco de paula Santander desarrollar este proyecto.Se contruyó una Planta Demostrativa de producción de Coque que genera minima contaminación y utiliza energía de los gases en la producción de ladrillo, con el fin de demostrar a los productores de coque del país la tecnología apropiada para descontaminar las plantas productoras de coque en hornos tipo colemna.Al mismo tiempo se utilizó la planta para ensayar metódos y procesos de producción más económicos y eficientes, tales como: sistemas de transporte de carbón, carque u descargue de hornos, mezcla de carbones y utilización de la energía aprovechable de los gases.
The aim of this study was to analyze the prevalence of principal cardiovascular risk factors in the female population from Biscay (northern Spain).
We selected a random representative sample of 1,317 ...women aged between 16 and 65 years from this province. For each participant we recorded the following parameters: weight and height, physical activity, smoking, blood pressure, glycemia, total cholesterol, triglycerides, HDL-cholesterol and LDL-cholesterol.
A total of 1,100 women (mean age 39.83 14 years) participated. Regarding physical activity, 31.9% of the women had a sedentary lifestyle and 48.4% did not exercise during leisure time. The prevalence of smoking was 31.9%. We found a mean body mass index of 24.9 4.6 kg/m2, and 42.4% of the women were overweight. The prevalence of hypertension was 13.1%, hypertension being defined as a mean systolic blood pressure > or = 160 mmHg, diastolic blood pressure > or = 95 mmHg, current antihypertensive treatment, or any combination of these criteria. When a cutoff value of > or = 140/90 mmHg was used, the prevalence increased to 26.7%. Total cholesterol values were > or = 240 mg/dl in 26.2%, triglyceride levels were > or = 200 mg/dl in 2.6%, LDL-cholesterol was > or = 160 mg/dl in 26.8%, and HDL-cholesterol values were < 45 mg/dl in 12.2%. The prevalence of hyperglycemia was 3.3%.
The prevalences of main cardiovascular risk factors were similar to those in other Spanish studies. Except for smoking, the rest of these risk factors increased with age. Long-term measures should be adopted to modify dietary habits and lifestyles to obtain improvements in the cardiovascular risk profile.
Presentation Antonio Badan; Miguel F. Lavín; Elva Escobar ...
Geofísica internacional,
07/2003, Letnik:
42, Številka:
3
Journal Article
Recenzirano
Odprti dostop
En los primeros meses de 1997, el Pacífico Ecuatorial mostraba señales de un El Niño masivo inminente, y como consecuencia de las primeras predicciones, el evento recibió una enorme y sin precedentes ...cobertura de prensa, llamando la atención sobre la necesidad de mitigar sus efectos catastróficos en todo el mundo, sino también para tener en cuenta sus efectos moduladores en los esfuerzos económicos para mejorar la productividad económica. doi: https://doi.org/10.22201/igeof.00167169p.2003.42.3.970
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