Tuberculin skin test versus blood immunologic diagnosis of latent mycobacterium tuberclosis infection among old subjects

info:eu-repo/semantics/published

Contribution of a heparin-binding haemagglutinin interferon-gamma release assay to the detection of Mycobacterium tuberculosis infection in HIV-infected patients: comparison with the tuberculin skin test and the QuantiFERON-TB Gold In-tube.

The screening and treatment of latent tuberculosis (TB) infection reduces the risk of progression to active disease and is currently recommended for HIV-infected patients. The aim of this study is to evaluate, in a low TB incidence setting, the potential contribution of an interferon-gamma release assay in response to the mycobacterial latency antigen Heparin-Binding Haemagglutinin (HBHA-IGRA), to the detection of Mycobacterium tuberculosis infection in HIV-infected patients.

Análisis estadístico de un test de conocimientos previos de matemáticas para ingresantes universitarios

En este trabajo presentamos un análisis estadístico del Test de Conocimientos Previos de Matemáticas (TCPM) diseñado para medir el estado inicial de destrezas y conocimientos básicos en matemáticas de los alumnos ingresantes a carreras científico-tecnológicas de la Facultad de Ciencias Físico, Matemáticas y Naturales de la Universidad Nacional de San Luis. El objetivo de la investigación está centrado en observar el diagnóstico utilizado, con miras a una eventual utilización posterior. Para determinar la bondad de la prueba realizamos un análisis de la calidad, discriminación e índice de dificultad de los ítems, así como de la validez y confiabilidad del diagnóstico, para este análisis estadístico empleamos los programas TestGraf y SPSS. El test se aplicó a 698 estudiantes ingresantes a la Universidad en el ciclo lectivo 2002. De la investigación pudimos inferir que el diagnóstico resultó: difícil para la población de aplicación; de confiabilidad aceptable, y de buena calidad de items, con variada dificultad y aceptable discriminación.

Simulating one of the CIB W14 round robin test cases using the SMARTFIRE fire field model

Numerical predictions produced by the SMARTFIRE fire field model are compared with experimental data. The predictions consist of gas temperatures at several locations within the compartment over a 60 min period. The test fire, produced by a burning wood crib attained a maximum heat release rate of approximately 11MW. The fire is intended to represent a nonspreading fire (i.e. single fuel source) in a moderately sized ventilated room. The experimental data formed part of the CIB Round Robin test series. Two simulations are produced, one involving a relatively coarse mesh and the other with a finer mesh. While the SMARTFIRE simulations made use of a simple volumetric heat release rate model, both simulations were found capable of reproducing the overall qualitative results. Both simulations tended to overpredict the measured temperatures. However, the finer mesh simulation was better able to reproduce the qualitative features of the experimental data. The maximum recorded experimental temperature (12141C after 39 min) was over-predicted in the fine mesh simulation by 12%. (C) 2001 Elsevier Science Ltd. All rights reserved.