Obert per defecte, tancat quan sigui necessari: el cas de les dades de la recerca / Abierto por defecto, cerrado cuando sea necesario: el caso de los datos de investigación / Open by default, closed when necessary: the case for data in research

Les darreres decisions polítiques dels agents finançadors de la recerca han estat encaminades a fomentar la difusió dels resultats en obert, és a dir a oferir-los a tothom, sense cap mena de restricció, i permetent-ne la reutilització. Aquestes polítiques que van començar aplicant-se a les publicacions, s'han estès a les dades, un bé molt preuat entre els investigadors als quals no els és fàcil desprendre-se'n. El fet d'haver de compartir les dades ha obert un debat sobre quines dades cal compartir i com s'ha de fer-ho. A més, han sorgit moltes reticències algunes de les quals s'han escudat en el fet que hi ha dades que difícilment es podran oferir mai en obert atesa la seva naturalesa: dades personals o sensibles. En aquest text volem aclarir alguns aspectes d’aquestes polítiques encaminades a obrir les dades sempre que sigui possible i a tancar-les quan calgui

Las últimas decisiones políticas de los agentes financiadores de la investigación han sido encaminadas a fomentar la difusión de los resultados en abierto, es decir a ofrecerlos a todo el mundo, sin ningún tipo de restricción, y permitiendo la reutilización. Estas políticas que empezaron aplicándose a las publicaciones, se han extendido a los datos, un bien muy preciado entre los investigadores a los cuales no les es fácil desprenderse. El hecho de tener que compartir los datos ha abierto un debate sobre qué datos hay que compartir y cómo se tiene que hacer. Además, han surgido muchas reticencias algunas de las cuales se han escudado en el hecho que hay datos que difícilmente se podrán ofrecer nunca en abierto dada su naturaleza: datos personales o sensibles. En este texto queremos aclarar algunos aspectos de estas políticas encaminadas a abrir los datos siempre que sea posible y a cerrarlos cuando sea necesario

The latest decisions on policies from research funders have been aimed at promoting open dissemination of research outputs, available to everyone, without any restriction, and allowing their reuse. These policies, which began to be applied to publications, have been spread to research data, a well appreciated good among researchers who do not easily get rid of it. The requirement of sharing data has opened a debate on what to share and how to do it. In addition, there have been reluctances, some of them shielded from the fact that some data would never be open due to its nature: personal or sensitive data. In this text we want to clarify some aspects of these policies addressed to open data whenever it is possible and close them when it is necessary

Treatment of mining acidic leachates with indigenous limestone, Zimapan Mexico.

An experimental study to evaluate the potential of using indigenous limestones in a passive system to treat acid mine drainage, at a mining zone of Mexico was carried out. Chemical and mineralogical characteristics of four types of native rocks (KIT1, KIT2, KSS, QZ) showed distinct CaCO3 contents. Synthetic aqueous leachates from an old tailings impoundment had a pH of 2.18, 34 mg/L As, 705 mg/L Fetotal, and 3975 mg/L SO4(2-). To evaluate dissolution behavior of rocks, kinetic batch experiments with an acid Fe-rich solution were performed. Decaying kinetic constants adjusting H(+) concentration to a first order exponential process were: KIT1 (k = 2.89), KIT2 (k = 0.89) and KSS (k = 0.47). Infrared spectrum and XRD of precipitates showed schwertmannite formation. To determine As and heavy metals (Fe, Cd, Zn, Al) removal from the synthetic leachates, batch experiments using KIT1 were developed. Arsenic decreased from 34.00 mg/L to 0.04 mg/L, Fe and Al were totally removed, and concentrations of Zn and Cd decreased 88% and 91% respectively. Analyses by IR and SEM-EDS indicate that co-precipitation with Fe-Hydroxides formed upon leachate interaction with limestone is the main As removal process. Chamosite, identified by XRD may participate in the removal of Al, SiO2 and a fraction of Fe.

Optical correlation by use of partial phase-only modulation with VGA liquid-crystal displays.

The development of liquid-crystal panels for use in commercial equipment has been aimed at improving the pixel resolution and the display efficiency. These improvements have led to a reduction in the thickness of such devices, among other outcomes, that involves a loss in phase modulation. We propose a modification of the classical phase-only filter to permit displays in VGA liquid-crystal panels with a constant amplitude modulation and less than a 2pi phase modulation. The method was tested experimentally in an optical setup.

On-axis joint transform correlation based on a four-level power spectrum.

We propose a method to obtain a single centered correlation with use of a joint transform correlator. We analyze the required setup to carry out the whole process optically, and we also present experimental results.