Equivariant operads, string topology, and Tate cohomology

From an operad C with an action of a group G, we construct new operads using the homotopy fixed point and orbit spectra. These new operads are shown to be equivalent when the generalized G-Tate cohomology of C is trivial. Applying this theory to the little disk operad C_2 (which is an S^1 operad) we obtain variations on Getzler's gravity operad, which we show governs the Chas-Sullivan string bracket.Comment: 36 pages, 1 figure. Changes: main proofs and exposition streamlined, new section on continuous cohomology of operads, font changed. To appear in Math. An

Waking up to the Present: Vipassana Meditation and the Body

Using ethnographic methods I examine the process of learning vipassana meditation, a form of meditation in which the practitioner focuses on their bodily sensations, and the ways in which learning this form of meditation affects the practitioner\u27s daily life. I employ reflexivity alongside an ethnography of the particular to capture my experiences as the student of a Thai Theravada Buddhist monk who teaches at a temple in Portland, Oregon. Through this process I have found that learning vipassana meditation pervades numerous aspects of daily life, extending beyond direct instruction and meditation practice, bringing about perceptual changes in reality as learned concepts become embodied through both meditation and lived experience

My Time Abroad

This letter from returnee Craig Brenneke explains the value of studying abroad in France