Polyanalytic Hardy decomposition of higher order Lipschitz functions

This paper is concerned with the problem of decomposing a higher order Lipschitz function on a closed Jordan curve $\Gamma$ into a sum of two polyanalytic functions in each open domain defined by $\Gamma$. Our basic tools are the Hardy projections related to a singular integral operator arising in polyanalytic function theory, which, as it is proved here, represents an involution operator on the higher order Lipschitz classes. Our result generalizes the classical Hardy decomposition of Holder continuous functions on the boundary of a domain

Nivel de conocimientos sobre bioseguridad en Estomatología

A cross - sectional descriptive study was carried out to determine the level of knowledge about biosecurity in stomatology in the technical and professional staff of the Julio A. Mella Clinic in Guantanamo province. The universe was constituted by the stomatological personnel who showed willingness to fill out the questionnaire. Knowledge about biosafety was analyzed: (knowledge of Biosafety standards, indications of surface disinfection and instruments, communicable diseases and general evaluation of Biosafety knowledge). An exhaustive bibliographical revision on the subject was carried out with universal and national literatures. The primary data were obtained from a survey sheet prepared by the authors. There were low numbers on a level of knowledge that was moderately sufficient, most of them showed insufficiency.Se realizó un estudio descriptivo transversal con el objetivo de determinar el nivel de conocimiento sobre bioseguridad en Estomatología en  el personal técnico y Profesional de la Clínica “Julio A. Mella” de la provincia Guantánamo. El universo estuvo constituido por el personal estomatológico que mostró disposición en llenar el cuestionario. Se analizaron los conocimientos sobre bioseguridad: (conocimiento sobre las normas de Bioseguridad, indicaciones de desinfección de superficies e instrumental, enfermedades trasmisibles e evaluación en general de los conocimientos sobre Bioseguridad). Se realizó una exhaustiva revisión bibliográfica sobre el tema con literaturas universales y nacionales. Los datos primarios se obtuvieron de una planilla encuesta confeccionada por los autores. Se mostraron cifras bajas sobre nivel de conocimiento medianamente suficiente, la mayoría mostró insuficiencia de estos

Nivel de conocimientos sobre bioseguridad en Estomatología

A cross - sectional descriptive study was carried out to determine the level of knowledge about biosecurity in stomatology in the technical and professional staff of the Julio A. Mella Clinic in Guantanamo province. The universe was constituted by the stomatological personnel who showed willingness to fill out the questionnaire. Knowledge about biosafety was analyzed: (knowledge of Biosafety standards, indications of surface disinfection and instruments, communicable diseases and general evaluation of Biosafety knowledge). An exhaustive bibliographical revision on the subject was carried out with universal and national literatures. The primary data were obtained from a survey sheet prepared by the authors. There were low numbers on a level of knowledge that was moderately sufficient, most of them showed insufficiency.Se realizó un estudio descriptivo transversal con el objetivo de determinar el nivel de conocimiento sobre bioseguridad en Estomatología en  el personal técnico y Profesional de la Clínica “Julio A. Mella” de la provincia Guantánamo. El universo estuvo constituido por el personal estomatológico que mostró disposición en llenar el cuestionario. Se analizaron los conocimientos sobre bioseguridad: (conocimiento sobre las normas de Bioseguridad, indicaciones de desinfección de superficies e instrumental, enfermedades trasmisibles e evaluación en general de los conocimientos sobre Bioseguridad). Se realizó una exhaustiva revisión bibliográfica sobre el tema con literaturas universales y nacionales. Los datos primarios se obtuvieron de una planilla encuesta confeccionada por los autores. Se mostraron cifras bajas sobre nivel de conocimiento medianamente suficiente, la mayoría mostró insuficiencia de estos

Strain Elastography Fat-to-Lesion Index Is Associated with Mammography BI-RADS Grading, Biopsy, and Molecular Phenotype in Breast Cancer

Breast cancer (BC) affects millions of women worldwide, causing over 500,000 deaths annually. It is the leading cause of cancer mortality in women, with 70% of deaths occurring in developing countries. Elastography, which evaluates tissue stiffness, is a promising real-time minimally invasive technique for BC diagnosis. This study assessed strain elastography (SE) and the fat-to-lesion (F/L) index for BC diagnosis. This prospective study included 216 women who underwent SE, ultrasound, mammography, and breast biopsy (108 malignant, 108 benign). Three expert radiologists performed imaging and biopsies. Mean F/L index was 3.70 ± 2.57 for benign biopsies and 18.10 ± 17.01 for malignant. We developed two predictive models: a logistic regression model with AUC 0.893, 79.63% sensitivity, 87.62% specificity, 86.9% positive predictive value (+PV), and 80.7% negative predictive value (−PV); and a neural network with AUC 0.902, 80.56% sensitivity, 88.57% specificity, 87.9% +PV, and 81.6% −PV. The optimal Youden F/L index cutoff was >5.76, with 84.26% sensitivity and specificity. The F/L index positively correlated with BI-RADS (Spearman’s r = 0.073, p p = 0.002). SE complements mammography for BC diagnosis. With adequate predictive capacity, SE is fast, minimally invasive, and useful when mammography is contraindicated