ABSTRACT
The purpose of this study is to develop a system capable of performing calculation of temporal gait parameters using two low-cost wireless accelerometers and artificial intelligence-based techniques as part of a larger research project for conducting human gait analysis. Ten healthy subjects of different ages participated in this study and performed controlled walking tests. Two wireless accelerometers were placed on their ankles. Raw acceleration signals were processed in order to obtain gait patterns from characteristic peaks related to steps. A Bayesian model was implemented to classify the characteristic peaks into steps or nonsteps. The acceleration signals were segmented based on gait events, such as heel strike and toe-off, of actual steps. Temporal gait parameters, such as cadence, ambulation time, step time, gait cycle time, stance and swing phase time, simple and double support time, were estimated from segmented acceleration signals. Gait data-sets were divided into two groups of ages to test Bayesian models in order to classify the characteristic peaks. The mean error obtained from calculating the temporal gait parameters was 4.6%. Bayesian models are useful techniques that can be applied to classification of gait data of subjects at different ages with promising results.
Subject(s)
Acceleration , Gait/physiology , Signal Processing, Computer-Assisted , Accelerometry , Adult , Algorithms , Bayes Theorem , Female , Humans , Male , Middle Aged , Probability , Time Factors , Young AdultABSTRACT
Lithium-based ceramics have been proposed as tritium breeders for fusion reactors. The lithium aluminate (gamma phase) seems to be thermally and structurally stable, the damages produced by neutron irradiation depend on the absorbed dose. A method based on the measurement of neutron activation of foils through neutron capture has been developed to obtain the neutron absorbed dose in lithium aluminates irradiated in the thermal column facility and in the fixed irradiation system of a Triga Mark III Nuclear Reactor.
ABSTRACT
Se presenta un paciente con una dermatitis actínica crónica (DAC) que consulta a nuestro Servicio con un cuadro tipo eritrodérmico, que se agrava a la exposición solar. Sus estudios histopatológicos mostraron distintos patrones: infiltrados inflamatorios inespecíficos, espongiosis, etc, pero no se hallaron células atípicas. El cuadro mejora con la administración de beta-carotenos y corticoides locales (AU)
Subject(s)
Humans , Male , Middle Aged , Photosensitivity Disorders/diagnosis , Photosensitivity Disorders/drug therapy , Chronic Disease , beta Carotene/therapeutic use , Enalapril/adverse effectsABSTRACT
Se presenta un paciente con una dermatitis actínica crónica (DAC) que consulta a nuestro Servicio con un cuadro tipo eritrodérmico, que se agrava a la exposición solar. Sus estudios histopatológicos mostraron distintos patrones: infiltrados inflamatorios inespecíficos, espongiosis, etc, pero no se hallaron células atípicas. El cuadro mejora con la administración de beta-carotenos y corticoides locales
Subject(s)
Humans , Male , Middle Aged , Photosensitivity Disorders/diagnosis , beta Carotene/therapeutic use , Chronic Disease , Enalapril/adverse effects , Photosensitivity Disorders/drug therapyABSTRACT
Se presenta un paciente que padece un epitelioma basocalular de párpado con una miasis sobreagragada que modifica la lesión primitiva y a su vez la vuelve más agresiva en cuanto a su evolución. Se destaca la importancia de la evaluación exasustiva de estos tipos de tumores situados en zonas de alto riesgo para decidir de esa manera la técnica quirúrgica o el tratamiento más seguro. Se enfatiza la importancia de la cirugía micrográfica para estos casos" dificiles", el tratam,iento previo de la parasitosis, la utilización de técnica por imágenes que orientarán posteriormente la conducta quirúrgica y sobre todo el trabajo en conjunto de dermatólogos, oftalmólogos y cirujanos(AU)
Subject(s)
Humans , Male , Aged , Carcinoma, Basal Cell/diagnosis , Carcinoma, Basal Cell/surgery , Eyelid Neoplasms/surgery , Eyelid Neoplasms/diagnosis , Ultraviolet Rays/adverse effectsABSTRACT
Se presenta un paciente que padece un epitelioma basocalular de párpado con una miasis sobreagragada que modifica la lesión primitiva y a su vez la vuelve más agresiva en cuanto a su evolución. Se destaca la importancia de la evaluación exasustiva de estos tipos de tumores situados en zonas de alto riesgo para decidir de esa manera la técnica quirúrgica o el tratamiento más seguro. Se enfatiza la importancia de la cirugía micrográfica para estos casos" dificiles", el tratam,iento previo de la parasitosis, la utilización de técnica por imágenes que orientarán posteriormente la conducta quirúrgica y sobre todo el trabajo en conjunto de dermatólogos, oftalmólogos y cirujanos
Subject(s)
Humans , Male , Aged , Carcinoma, Basal Cell/diagnosis , Carcinoma, Basal Cell/surgery , Eyelid Neoplasms/surgery , Eyelid Neoplasms/diagnosis , Ultraviolet Rays/adverse effectsABSTRACT
Al oral monophasic contraceptive formulation containing gestodene (75 mcg) and ethynilestradiol (30 mcg) is evaluated concerning its safety, efficacy and cycle-control. Sixty-seven healthy women were included, allowing a total of 574 evaluable cycles. This formulation showed a high degree of efficacy, with no pregnancies after its utilization. Side affects were similar or lower to other reported with another hormonal contraceptive oral formulations. Hematologic, biochemical or urinary parameters were not altered. An acceptable menstrual pattern was maintained. In conclusion, this formulation constitutes an oral contraceptive with a high efficacy rate, a well degree of acceptability and with a side effects profile similar or lower than those produced by other oral contraceptives.