Multi-hump bright and dark solitons for the Schrödinger-Korteweg-de Vries coupled system.

The Hirota bilinear method is extended to find one- and two-hump exact bright and dark soliton solutions to a coupled system between the linear Schrödinger and Korteweg-de Vries (KdV) equations arising in the energy transfer problem along a cubic anharmonic crystal medium. The bilinear form associated to this system is found by imitating the well known bilinearizing transformations used in the standard nonlinear Schrödinger (NLS) and KdV equations. Proper finite exponential expansions in the transformed variables allow one to exhibit multihump soliton solutions as single entities resulting from the adjustment of appropriate dispersion relations between the wave parameters describing the profiles. It is found that such one- and two-hump solutions correspond to the one- and two-KdV solitons trapped by both the bright and dark-gray NLS solitons. Our two-hump bright and dark solutions represent novel solutions for the type of interactions and nonlinearities considered.

Pin-Site Myiasis Caused by Screwworm Fly in Nonhealed Wound, Colombia.

Pin-site myiasis is an underreported complication of surgical interventions. We present a case of myiasis caused by the New World screwworm fly (Cochliomyia hominivorax) in a pin site of a chronic nonhealed wound 12 years after the intervention. This infection apparently was the result of poor perfusion of the leg.

Reduced right frontal cortical thickness in children, adolescents and adults with ADHD and its correlation to clinical variables: a cross-sectional study.

OBJECTIVE: Some longitudinal magnetic resonance imaging (MRI) studies have shown reduced volume or cortical thickness (CT) in the frontal cortices of individuals with attention-deficit/hyperactivity disorder (ADHD). These studies indicated that the aforementioned anatomical abnormalities disappear during adolescence. In contrast, cross-sectional studies on adults with ADHD have shown anatomical abnormalities in the frontal lobe region. It is not known whether the anatomical abnormalities in ADHD are a delay or a deviation in the encephalic maturation. The aim of this study was to compare CT in the frontal lobe of children, adolescents and adults of both genders presenting ADHD with that in corresponding healthy controls and to explore its relationship with the severity of the illness. METHOD: An MRI scan study was performed on never-medicated ADHD patients. Twenty-one children (6-10 year-olds), twenty adolescents (14-17 year-olds) and twenty adults (25-35 year-olds) were matched with healthy controls according to age and sex. CT measurements were performed using the Freesurfer image analysis suite. RESULTS: The data showed regions in the right superior frontal gyrus where CT was reduced in children, adolescents and adults with ADHD in contrast to their respective healthy controls. The CT of these regions correlated with the severity of the illness. CONCLUSIONS: In subjects with ADHD, there is a thinning of the cortical surface in the right frontal lobe, which is present in the children, adolescents and in adults.

Diferencias en el desarrollo de momentum al levantarse desde una silla en adultos mayores con y sin historia de caídas frecuentes / Differences in the momentum development during transfers sit to stand between fall and no fall elderly

Introducción El momentum del cuerpo superior (CS) que comprende los segmentos de tronco, cabeza y extremidades superiores, durante la transferencia de sedestación a bipedestación (STS [sit-to-stand]) podría ser sensible al deterioro del control postural dinámico y con ello al riesgo de caídas. El objetivo de este estudio fue cuantificar las diferencias en el desarrollo del momentum sobre el CS durante el STS en una muestra de adultos mayores con y sin historia de caídas frecuentes (SHCF).Material y métodos La muestra fue de veintitrés adultos mayores voluntarios (n=23), siete con antecedentes de caídas frecuentes (más de dos caídas en el ultimo año) y dieciséis sin dicho antecedente.Material y métodos Mediante un sistema de análisis de movimiento se registró la cinemática del CS durante el STS, a partir de la cual se calculó el momentum del CS. Como variables de análisis se determinaron los valores máximos del momentum lineal vertical (PVM) y horizontal (PHM), como también los máximos (LMax) y mínimos (LMin) del momentum angular, además de la máxima flexión de tronco (θMCS).Resultados No se observaron diferencias significativas en las variables de PHM, LMax y LMin (p>0,05). Existió diferencia significativa en PVM (p=0,03) y en θMCS (p=0,03) entre ambos grupos.Conclusiones Para la muestra evaluada, una característica de los sujetos con antecedentes de caídas frecuentes fue la pobre capacidad de generar momentum en el sentido vertical y un aumento de la flexión del cuerpo superior, en comparación con los sujetos SHCF (AU)

Introduction The momentum of the upper body (UB) during transfer sit-to-stand (STS) could be sensitive to the deterioration of dynamic postural control, and also the risk of falls. The aim of this study is to quantify the differences in the momentum development on UB during the STS in a sample of fall and no-fall elderly subjects.Material and mehods The sample consisted of twenty three voluntary elderly subjects (n=23), six elderly adults with antecedents of frequent falls (more than two within a year period) and seventeen without histories of frequent falls. Material and mehodsThrough a motion analysis system we registered the kinematics of UB during STS, from which we calculated the momentum of UB. The determined analysis variables were: the maximum values of the vertical (PVM) and horizontal (PHM) lineal momenta, the minimum (LMax) and maximum (LMin) values of the angular momentum and maximum trunk flexion (θMUB).Results No difference was observed in PHM, LMax and LMin (P>0.05) between both groups. However, a significant difference was found for the variable PVM (P=0.03) and θMUB (P=0.03) between both groups. ConclusionsWe can conclude that, for the sample studied, the frequent fall condition relates to a smaller capacity to develop vertical momentum and increase flexion of the upper body (AU)

[Differences in momentum development when standing up from a chair between elderly with and without frequent falls history]. / Diferencias en el desarrollo de momentum al levantarse desde una silla en adultos mayores con y sin historia de caídas frecuentes.

INTRODUCTION: The momentum of the upper body (UB) during transfer sit-to-stand (STS) could be sensitive to the deterioration of dynamic postural control, and also the risk of falls. The aim of this study is to quantify the differences in the momentum development on UB during the STS in a sample of fall and no-fall elderly subjects. MATERIAL AND MEHODS: The sample consisted of twenty three voluntary elderly subjects (n=23), six elderly adults with antecedents of frequent falls (more than two within a year period) and seventeen without histories of frequent falls. Through a motion analysis system we registered the kinematics of UB during STS, from which we calculated the momentum of UB. The determined analysis variables were: the maximum values of the vertical (P(V)M) and horizontal (P(H)M) lineal momenta, the minimum (L(Max)) and maximum (L(Min)) values of the angular momentum and maximum trunk flexion (thetaM(UB)). RESULTS: No difference was observed in P(H)M, L(Max) and L(Min) (P>0.05) between both groups. However, a significant difference was found for the variable P(V)M (P=0.03) and thetaM(UB) (P=0.03) between both groups. CONCLUSIONS: We can conclude that, for the sample studied, the frequent fall condition relates to a smaller capacity to develop vertical momentum and increase flexion of the upper body.

Treceaba cumbre iberoamericana de jefes de estado y de gobierno. Informe de viaje / En

Este documento corresponde a un informe de viaje, el cual se lo puede dividir en tres momentos: a) La asistencia y presencia protocolar en los actos de la cumbre. b) Reuniones con ministros del gobierno boliviano juntamente con los Directores Regionales de la Agencias del Sistema de Naciones Unidas. c) Reunión con el Ministro de salud de Bolivia conjuntamente con los directores regionales de UNICEF y UNFPA. Podemos añadir un último momento para indicar que se desarrolló una reunión con el Ministro de Salud, doctor Fernando Antezana y con la dirección de Relaciones Internacionales del Ministro de Salud en La Paz.

Câncer de pele-Piauí-1964-1984: I. Carcinoma basocelular / Skin cancer-Piauí-1964-1984: I. Basal cell carcinoma

Apresenta-se uma estatística de câncer de pele, do Estado do Piauí, referente ao perído de 1964-1984, sendo aqui estudada a parte I, correspondente ao carcinoma basocelular. Foram analisados 3.569 prontuários, sendo 3.175 correspondentes a carcinoma basocelular, 311 a carcinoma espinocelular e 94 a melanoma maligno. Na estatística de carcinoma basocelular, foram analisadas as formas clínicas, localizaçöes dos tumores, faixa etária, sexo, cor da pele, procedência, números de lesöes por pacientes, origens dos tumores, meios terapêuticos e controles de cura. Chama-se a atençäo para o descaso nas medidas preventivas contra-o carcinoma basocelular, uma vez que apenas é comentada a importância das radiaçöes solares na gênese dos tumores, por parte dos médicos. Na análise feita houve predomínio da cor parda sobre a branca e o autor apresenta justificativas. Houve, também predomínio do sexo feminino sobre o masculino. Foi observado que predomina o número de pacientes procedentes da zona rural sobre a urbana, o que fala a favor da influência da maior irradiaçäo solar na incidência da neoplasia. Chama-se a atençäo, também sobre o descaso por parte dos médicos, no tocante a informaçöes sobre as origens do tumor, e comenta rapidamente a terapêutica empregada, concluindo que o controles do câncer, após o tratamento, é obrigatório, pois permitirá detectar precocemente as recidivas ou metástases das lesöes tratadas

Câncer de pele-Piauí-1964-84: II. Carcinoma espinocelular / Skin carcinoma-Piauí-1964-1984: II. Squamous cell carcinoma

O autor apresenta uma estatística de câncer de pele, do Piauí, referente ao período de 1964-1984, na parte correspondente ao carcinoma espinocelular. Foram analisadas as formas clínicas, localizaçöes, faixa etária, sexo, cor da pele, procedência, meios terapêuticos e controle de cura. O lábio inferior foi a área anatômica que apresentou maior incidência do tumor e a zona rural a regiäo com maior percentual de pacientes. O autor chama a atençäo para a obrigatoriedade do controle de cura, independente do meio terapêutico empregado, como a única condiçäo de diagnosticar precocemente as recidivas ou metástases que venham a ocorrer e tratá-las imediatamente com grandes possibilidades de êxito