Problemas rutinarios y no rutinarios en educación secundaria

Se presenta un informe de una investigación en proceso conformada por una revisión de los problemas de probabilidad en educación secundaria, un análisis de los problemas de probabilidad que se plantean en los libros de texto de educación secundaria y en los materiales de olimpiadas matemáticas locales e internacionales de este nivel educativo. Con esto se pretende constatar el desarrollo de actitudes hacia las matemáticas de alumnos, cuando solucionan problemas de probabilidad rutinarios o no rutinarios

La solución de problemas no rutinarios y actitudes hacia el estudio de las matemáticas en el nivel medio superior de la Uagro

En este escrito presentamos un proyecto de investigación sobre problemas auténticos y actitudes hacia el estudio de las matemáticas en el nivel medio superior. Se parte del supuesto de que proponer y resolver problemas auténticos genera actitudes positivas. Los problemas auténticos son los que abordan situaciones reales y de relevancia social. A pesar del reconocimiento de la relevancia de estos problemas su utilización en la escuela es escasa. El objetivo de la investigación es constatar el desarrollo de actitudes positivas hacia el estudio de las matemáticas cuando los alumnos resuelven problemas auténticos. Para su logro proponemos un estudio documental en este ámbito, un análisis, búsqueda y selección de problemas auténticos y una actividad con profesores y alumnos de este nivel educativo

Study for Automatically Analysing Non-repudiation

While security issues such as secrecy and authentication have been studied intensively, most interest in non-repudiation protocols has only come in recent years. Non-repudiation services must ensure that when two parties exchange informations over a network, neither one nor the other can deny having participated in this communication. Consequently a non-repudiation protocol has to generate evidences of participation to be used in the case of a dispute. In this paper, we present a description of non-repudiation services, and illustrate them on the Fair Zhou-Gollmann protocol. Then we show how to define non-repudiation properties with the AVISPA tool and explain how they can be automatically verified

Es difícil olvidarse

El presente artículo recorre, a través de la idea de poder, no orwelliana pero muy cercana, la actualidad en nuestro país y en las sociedades modernas occidentales.Centro de Investigación en Lectura y Escritura (CILE

Colonialidade do saber nas Relações Internacionais: um debate epistêmico

1º Congresso Internacional Epistemologias do Sul: perspectivas críticas - 7 a 9 de novembro de 2016, realizada pela Universidade Federal da Integração Latino-Americana (UNILA).A presente proposta tem como objetivo problematizar a disciplina das Relações Internacionais a partir de um olhar crítico à sua estrutura tradicional. Os diferentes enfoques reflexivistas são apontados pela pesquisa aqui desenvolvida como propiciadores de análises descentradas, colocando em xeque noções universalizantes sobre o mundo. Objetiva-se problematizar a formulação de conceitos chaves das Relações Internacionais, como forma de apontar a relação de tal disciplina com a colonialidade. Alguns destes enfoques se diferenciam por destacarem a relação entre discurso e poder na configuração das localidades. Os estudos que se debruçam sobre as influências da colonialidade nas relações travadas em âmbito internacional ainda são recentes e se constituem de concepções multidisciplinares

Es difícil olvidarse

El presente artículo recorre, a través de la idea de poder, no orwelliana pero muy cercana, la actualidad en nuestro país y en las sociedades modernas occidentales.Centro de Investigación en Lectura y Escritura (CILE

A pilot study evaluating the safety of vaginal administration of a multi-particulate pellet formulation

Aim: Quantitative evaluation of the effect caused by vaginal administration of gelatin capsules loaded with starch pellets and lyophilized powder, respectively, on vaginal pH and microflora. Method: Administration of gelatin capsules loaded with fast-disintegrating starch pellets (group P) or lyophilized lactose/skimmed milk (group L) was compared to no intervention (group C) in a 3-way randomized, double-blinded, parallel study with 18 volunteers. Follow-up visits were at day 6 (immediately after administration), day 14 (pill stop), day 22 (after withdrawal bleeding) and day 35 (midcycle). Vaginal pH was measured and swabs were taken for Gram staining and culture to assess the presence of hydrogen peroxide-producing lactobacilli. Colposcopy was performed to assess the occurrence of adverse effects on the vaginal and ectocervical mucosa. Results: No severe adverse events occurred. For all women, vaginal pH and Gram stain were normal from screening until pill stop. Although immediately after withdrawal bleeding, 8 out of 18 women had an elevated pH, a disturbed microflora or lacked hydrogen peroxide-producing lactobacilli, all women had hydrogen peroxide-producing lactobacilli and a normal vaginal pH at midcycle, and all but two had a normal Gram stain. Conclusion: No major differences could be observed between the groups, whereby all changes in pH and microflora could be ascribed to withdrawal bleeding, indicating that gelatin capsules, starch pellets and lyophilized powder are acceptable carrier materials for the vaginal delivery of probiotic strains

A review of Piasites Seyrig (Hymenoptera, Ichneumonidae, Cryptinae), with description of seven new species

The taxonomic limits of the Malagasy genus Piasites Seyrig are reviewed. The genus is redescribed and compared to other similar taxa, especially the Afrotropical Bozakites Seyrig. The type species, P. carinatus Seyrig, is redescribed; its extensive colour variation is described and discussed. Seven new species are described and illustrated: P. lineatus, P. nigricollis, P. orbitalis, P. perinetensis, P. politus, P. quasimodus and P. seyrigi. An identification key to the species is presented.Most of this work was accomplished during a scientific visit by the first author to the MNHN funded by the University of Alicante, Spain (Programa Propio para el fomento de la I+D+i de la Universidad de Alicante 2021, Vicerrectorado de Investigación, Ref. ACIE21-03)