ABSTRACT
No disponible
Subject(s)
Humans , Female , Middle Aged , Headache/complications , Headache/drug therapy , Headache/etiology , Dipyrone/therapeutic use , Diazepam/therapeutic use , Oxygen/therapeutic use , Indapamide/therapeutic use , Magnetic Resonance Imaging/methods , Skull , Skull/pathology , SkullABSTRACT
No disponible
Subject(s)
Humans , Female , Adult , Shock, Cardiogenic/etiology , Hypopituitarism/complications , Empty Sella Syndrome/complications , Postpartum PeriodABSTRACT
Se ha realizado un estudio de la dieta del equipo de competición infantil en esquí alpino (Club Monachil, Sierra Nevada). Son niños con edades entre 7-12 años. Se consideran dos grupos, los residentes en la estación de esquí y los de ciudad que esquían en fin de semana. Se han realizado encuestas de recuerdo 24 horas. El valor medio de energía, es 3218 Kcal/día ñ 819 (grupo de la sierra) y 2485 Kcal/día ñ 600 (grupo de ciudad), no existen diferencias significativas entre grupos (p 0,3). La distribución de energía a partir de los nutrientes energéticos es correcta para los niños deportistas de la sierra, tanto en el fin de semana como entre semana; los niños deportistas de ciudad tienen un consumo excesivo de lípidos (43 por ciento) y prótidos (17 por ciento), el aporte de energía de carbohidratos no llega al 55 por ciento. Se observa una modificación de la dieta y del consumo de energía y nutrientes cuando los niños pasan del hogar familiar a la practica del deporte (AU)
Subject(s)
Child , Humans , Energy Intake/physiology , Skiing/physiology , Child Nutritional Physiological Phenomena/physiology , Nutritional Requirements , Analysis of Variance , Food and Nutrition EducationABSTRACT
The Debye formulation of focused fields has been systematically used to evaluate, for example, the point-spread function of an optical imaging system. According to this approximation, the focal wave field exhibits some symmetries about the geometrical focus. However, certain discrepancies arise when the Fresnel number, as viewed from focus, is close to unity. In that case, we should use the Kirchhoff formulation to evaluate accurately the three-dimensional amplitude distribution of the field in the focal region. We make some important remarks regarding both diffraction theories. In the end we demonstrate that, in the paraxial regime, given a defocused transverse pattern in the Debye approximation, it is possible to find a similar pattern but magnified and situated at another plane within the Kirchhoff theory. Moreover, we may evaluate this correspondence as the action of a virtual thin lens located at the focal plane and whose focus is situated at the axial point of the aperture plane. As a result, we give a geometrical interpretation of the focal-shift effect and present a brief comment on the problem of the best-focus location.
