Abelian and derived deformations in the presence of Z-generating geometric helices

For a Grothendieck category C which, via a Z-generating sequence (O(n))_{n in Z}, is equivalent to the category of "quasi-coherent modules" over an associated Z-algebra A, we show that under suitable cohomological conditions "taking quasi-coherent modules" defines an equivalence between linear deformations of A and abelian deformations of C. If (O(n))_{n in Z} is at the same time a geometric helix in the derived category, we show that restricting a (deformed) Z-algebra to a "thread" of objects defines a further equivalence with linear deformations of the associated matrix algebra.Comment: 21 page

On deformations of triangulated models

This paper is the first part of a project aimed at understanding deformations of triangulated categories, and more precisely their dg and A infinity models, and applying the resulting theory to the models occurring in the Homological Mirror Symmetry setup. In this first paper, we focus on models of derived and related categories, based upon the classical construction of twisted objects over a dg or $A_{\infty}$-algebra. For a Hochschild 2 cocycle on such a model, we describe a corresponding "curvature compensating" deformation which can be entirely understood within the framework of twisted objects. We unravel the construction in the specific cases of derived A infinity and abelian categories, homotopy categories, and categories of graded free qdg-modules. We identify a purity condition on our models which ensures that the structure of the model is preserved under deformation. This condition is typically fulfilled for homotopy categories, but not for unbounded derived categories.Comment: 40 page

Review of Appraisal and Acquisition Strategies

Review of Appraisal and Acquisition Strategies

Women of the Heartland : tradition and evolution in the Missouri women's movement

Title from PDF of title page (University of Missouri--Columbia, viewed on Feb 17, 2010).The entire thesis text is included in the research.pdf file; the official abstract appears in the short.pdf file; a non-technical public abstract appears in the public.pdf file.Thesis advisor: Dr. Catherine Rymph.M.A. University of Missouri--Columbia 2009.This thesis is a local study of the women's movement in Missouri. The primary topic is organized feminist activity, though it shows also feminist/antifeminist interactions. Missouri early established an official Commission on the Status of Women, offering detailed records. NOW and NWPC also established chapters early on in Missouri, allowing comparison with the national-level movement. Finally, Missouri's legislature deadlocked on ratification of the Equal Rights Amendment, a story helping clarify feminist/antifeminist differences in the state. Most national feminist groups broadened their goals to include the social liberation of women. In Missouri, this process was often less thorough. Faced with strong traditionalism, Missouri feminists downplayed sexual orientation and regularly attempted to divorce abortion from their ERA lobbying. The ratification failure was caused by the same factors. Though Missouri feminism followed the same initial trajectory as national feminism, their paths diverged somewhat due to internal dissension within women's groups, negative public opinion in the state population, or constraints imposed on activism by the state legislature.Includes bibliographical references

Boundary work in a project-based organization:Flow across interdependent boundaries in interorganizational programs

Project-based organizations (PBOs) increasingly initiate the strategic change to work in interorganizational programs. Establishing such a change is challenging due to the short-term focus, high levels of autonomy, and the varying involvement of interorganizational actors in projects. We adopt a boundary work lens to study how public PBOs operating in infrastructure address the parent organization – program, parent organization – project, and project – project boundaries that emerge when organizing work in programs. Based on two in-depth qualitative case studies, we identified the importance of establishing a continuous and predictable flow in projects, processes, and learning in achieving effective collaboration in interorganizational programs. We find that boundary work at any individual boundary is insufficient to reap the benefits of such programmatic collaboration. Our study offers novel insights into boundary work and program management literature by shedding light on the interdependent nature of boundaries in the strategic change to work in interorganizational programs in PBOs