Combined analysis of the decays τ−→KSπ−ντ\tau^-\to K_S\pi^-\nu_\tau and τ−→K−ηντ\tau^-\to K^-\eta\nu_\tau

In a combined study of the decay spectra of $\tau^-\to K_S\pi^-\nu_\tau$ and $\tau^-\to K^-\eta\nu_\tau$ decays within a dispersive representation of the required form factors, we illustrate how the $K^*(1410)$ resonance parameters, defined through the pole position in the complex plane, can be extracted with improved precision as compared to previous studies. While we obtain a substantial improvement in the mass, the uncertainty in the width is only slightly reduced, with the findings $M_{K^{*\prime}}=1304 \pm 17\,$MeV and $\Gamma_{K^{*\prime}} = 171 \pm 62\,$MeV. Further constraints on the width could result from updated analyses of the $K\pi$ and/or $K\eta$ spectra using the full Belle-I data sample. Prospects for Belle-II are also discussed. As the $K^-\pi^0$ vector form factor enters the description of the decay $\tau^-\to K^-\eta\nu_\tau$, we are in a position to investigate isospin violations in its parameters like the form factor slopes. In this respect also making available the spectrum of the transition $\tau^-\to K^-\pi^0\nu_\tau$ would be extremely useful, as it would allow to study those isospin violations with much higher precision.Comment: 20 pages, 1figur

Minimal true-implies-false and true-implies-true sets of propositions in noncontextual hidden variable theories

An essential ingredient in many examples of the conflict between quantum theory and noncontextual hidden variables (e.g., the proof of the Kochen-Specker theorem and Hardy's proof of Bell's theorem) is a set of atomic propositions about the outcomes of ideal measurements such that, when outcome noncontextuality is assumed, if proposition $A$ is true, then, due to exclusiveness and completeness, a nonexclusive proposition $B$ ($C$) must be false (true). We call such a set a {\em true-implies-false set} (TIFS) [{\em true-implies-true set} (TITS)]. Here we identify all the minimal TIFSs and TITSs in every dimension $d \ge 3$, i.e., the sets of each type having the smallest number of propositions. These sets are important because each of them leads to a proof of impossibility of noncontextual hidden variables and corresponds to a simple situation with quantum vs classical advantage. Moreover, the methods developed to identify them may be helpful to solve some open problems regarding minimal Kochen-Specker sets.Comment: 9 pages, 7 figure

Parenting Young Children: Comparison of a Psychoeducational Program in Mexico and the United States

The purpose of this study was to compare the cross-cultural effectiveness of a psychoeducational program with 82 Mexican and 63 American mothers with very young children. The 10-hour program was presented by trained facilitators in Mexico and the United States to small groups of mothers. Results showed that the both groups of mothers significantly increased their expectations and use of nurturing strategies and reduced their use of verbal and corporal punishment with their young children following the program. In addition, the reported frequency of child behavior problems decreased significantly at post-test. The similar results obtained across cultures were explained based on research finding similar parenting practices with young children between Mexican and American parents

La cultura tiene permiso. XEJB y la política cultural del estado de Jalisco, 1941-1992

Investigación que parte de la identificación de la política cultural en Jalisco y su relación con el desarrollo y utilización de la emisora estatal XEJB, para conocer el papel de los medios de difusión en los planes sobre educación y cultura del Gobierno de la República. Para ello, se realizó la reconstrucción del desarrollo de la estación XEJB de 1941 a 1992, mediante una perspectiva historiográfica. Primeramente, se ubicó a la estación dentro del desarrollo nacional del medio paralelo a un seguimiento sobre las políticas culturales en Jalisco. Posteriormente, se hizo una revisión de las políticas federales que ha emitido el gobierno de la República en la materia para contextualizar el entorno local y para obtener conclusiones sobre un posible diseño y administración regional de la política cultural del estado. Finalmente, al presentar la reconstrucción del desarrollo histórico de la XEJB, se plantea la manera en que los gobernantes en turno entendían la “cultura” o la difusión de la misma, lo cual incidía directamente en el uso y contenidos de la emisora estatal

Reconstruindo a Escala Kansas de Reflexão-Impulsividade para Pré-escolares (KRISP)

A escala Kansas de Reflexão-Impulsividade para Pré-escolares (KRISP) foi desenvolvida na década de setenta do século passado para avaliar os estilos cognoscitivos de reflexão-impulsividade (R-I). Estudos posteriores demonstraram que a KRISP apresentava algumas deficiências para avaliar os estilos de R-I em pré-escolares; porém, por não existir outro instrumento, esta escala continua sendo utilizada internacionalmente. Este estudo teve como objetivo obter uma nova versão da escala KRISP como ferramenta confiável para o estudo dos estilos de R-I. Participaram 59 crianças com uma idade média de 3.9 anos (DE = 0.39). Várias estratégias metodológicas permitiram obter uma versão da KRISP com 10 itens. A análise desta versão indicou valores alfa de Cronbach de .83 para as latências e .67 para os erros e uma correlação latência-total de erros de -.36 (p = .002). Discute-se a importância desta nova versão, denominada KRISP-R, bem como a necessidade de estudos com mostras maiores que a deste estudo e que incluam variáveis que tradicionalmente se relacionaram com os estilos de R-I.The Kansas Reflection-Impulsivity Scale for Preschoolers (KRISP) was developed in the 70's of the last century for testing the cognitive styles of reflection-impulsivity (R-I). Later, research studies pointed out some deficiencies of the KRISP as a measure of R-I styles; however, researchers are still using the KRISP, probably because it is the sole scale available to test preschoolers' styles. The aim of the present study was to develop an improved version of the scale for the assessment of R-I in preschoolers. Participants were 59 preschoolers with a mean age of 3.4 years (SD = 0.39). Several methodological strategies allowed the authors to develop a 10-itemversion of the scale. Analyses with this new version indicated alpha Cronbach coefficients of .82 for latencies and of .67 for total errors. The obtained correlation between latency and errors was -.36 (p = .002). Based on these analyses a new version of the scale, called KRISP-R, is proposed. The importance of carrying out research studies of the new scale but with bigger samples and variables that have been traditionally related with the R-I styles is also discussed.La escala Kansas de Reflexión-Impulsividad para Preescolares (KRISP) fue desarrollada en la década de los setentas del siglo pasado para evaluar los estilos cognoscitivos de reflexión-impulsividad (R-I). Estudios posteriores demostraron que la KRISP presentaba algunas deficiencias para evaluar los estilos de R-I en preescolares; sin embargo, al no existir otro instrumento, esta escala se ha seguido utilizando a nivel internacional. Este estudio tuvo como objetivo lograr una nueva versión de la escala KRISP como herramienta confiable para el estudio de los estilos de R-I. Participaron 59 niños con una edad promedio de 3.9 años (DE = 0.39). Varias estrategias metodológicas permitieron obtener una versión de la KRISP con 10 ítems. El análisis de esta versión indicó valores alfa de Cronbach de .83 para las latencias y .67 para los errores y una correlación latencia-total de errores de -.36 (p = .002). Se discute la importancia de esta nueva versión, denominada KRISP-R, así como la necesidad de estudios con muestras mayores que la de este estudio y que incluyan variables que tradicionalmente se han relacionado con los estilos de R-I