Anarchism & Sexuality

Spot activity in the RS CVn binary DM Ursae Majoris

“…In order to clearly understand the spot activity in DM UMa, we have been monitoring it photometrically independently at Kavalur and Mt Laguna -at the former in BV bands since the discovery of its light variability in 1979 almost continuously except for a break during 1995-2003, and at the latter place continuously from 1986 onwards, initially for four years in UBV bands and later in UBVRI bands. The photometry obtained at Kavalur during 1980-91 and preliminary results of the observations at Mt Laguna during 1986-88 have already been published (Mohin et al 1985;Heckert et al 1988;Heckert 1990;Mohin & Raveendran 1992. In this paper, we present the photometry obtained at Kavalur during 1993-2008and that at Mt Laguna during 1988.…”

“…object of several photometric studies which showed that remarkable changes occur in the light curve of the star from season to season and even within the same season itself, indicating that large-scale variations occur in the surface distribution of star-spots on the active star on various time-scales (Mohin et al 1985;Heckert et al 1988;Heckert 1990;Mohin & Raveendran 1992. Nations & Ramsey (1986) have reported that the strength of Hα emission in DM UMa varied by a factor of 3 over its orbital period during one of their observing runs.…”

“…The plots of (B − V) colour against the corresponding V magnitude of active RS CVn stars, in general, show a large scatter, much larger than that expected from observational uncertainties (Ulvas & Engvold 2003;Ulvas & Henry 2005;Rosario, Raveendran & Mekkaden 2007). In the case of DM UMa, (U − B) also shows a large scatter and at times it does not appear to follow the V and (B − V) curves (Heckert et al 1988;Heckert 1990). In analogy with the Sun, it is quite reasonable to expect the presence of bright facular or plage-like regions on the active star (Rodono & Cutispoto 1992;Tas, Evren & Ibanoglu 1999;Ulvas & Engvold 2003;Ulvas & Henry 2005).…”

El olvido recobrado: sexualidad y políticas radicales en el Movimiento de Liberación Homosexual en Colombia

“…En esto hay varios elementos principales de la propuesta ético-política de El Otro y de Zuleta, que bien lo pondrían en línea con principios fundamentales del anarquismo, como expresa Heckert (2004): búsqueda de una posibilidad de organización sin dominación; cooperación para lograr objetivos compartidos; promoción de la libertad individual y de la autonomía. Para Zuleta…”