A general formalism for single and double spin asymmetries in inclusive hadron production

We present a calculation of single and double spin asymmetries for inclusive hadron production in hadronic collisions. Our approach is based on Leading Order (LO) perturbative QCD and generalized factorization theorems, with full account of intrinsic parton momentum, k_T, effects. This leads to a new class of spin and k_T-dependent distribution and fragmentation functions. Limiting ourselves to consider leading twist functions, we show how they could play a relevant role in producing non-vanishing spin asymmetries.Comment: LaTeX, 8 pages, uses ws-procs9x6.cls. Talk delivered by S. Melis at the ``X Convegno su Problemi di Fisica Nucleare Teorica'', October 6-9, 2004, Cortona, Ital

Constraints on Gluon Sivers Distribution from RHIC Results

We consider the recent RHIC data on the transverse single spin asymmetry (SSA) A_N, measured in p(transv. polarized) p --> pion X processes at mid-rapidity by the PHENIX Collaboration. We analyze this experimental information within a hard scattering approach based on a generalized QCD factorization scheme, with unintegrated, transverse momentum dependent (TMD), parton distribution and fragmentation functions. In this kinematical region, only the gluon Sivers effect could give a large contribution to A_N; its vanishing value is thus used to give approximate upper limits on the gluon Sivers function (GSF). Additional constraints from the Burkardt sum rule for the Sivers distributions are also discussed.Comment: LaTeX 2e, 4 pages, 2 ps figures, uses aipproc.cls. Talk delivered by U. D'Alesio at the "17th International Spin Physics Symposium", SPIN2006, October 2-7, 2006, Kyoto, Japa

Imagine being asked to evaluate your CEO …: Using the constructive controversy approach to teach gender and management in times of economic crisis

This article addresses the relationship between gender and management as intertwined discursive practices. Following a constructive controversial approach, we proposed to the students to complete a short story in which they have to give a feedback either to a fictitious female or to a male boss. The article has a dual aim since it offers a reflection on a teaching methodology suited to foster critical thinking in the classroom and analyzes the narratives so produced in search of what constitutes the students’ idea of “good management.” In positioning men/women CEO within a narrative, students enact a moral order that evaluates management in society. Their narratives reveal how the economic crisis has undermined the positive image of the male manager, while femaleness is emphasized for its anti-managerial imaginary. Moreover, the idea of what constitutes “good management” is constructed around an idea of care for both male and female CEOs

What makes a “good manager”? Positioning gender and management in students’ narratives

The purpose of this paper is to address the relationships between gender and management in the narratives of students. More specifically, the authors discuss how the discourse on management is mobilized as a discursive practice able to make some form of that activity thinkable and practicable: who can be a CEO? What kind of managerial competencies are attributed to men/women CEOs? What kind of moral order is expressed in the stories told? Design/methodology/approach – Stimulus texts have been used to elicit narratives. Students were asked to complete a short story regarding a fictive managerial character, either female or male, whose performance and attitude they were asked to evaluate. Findings – The paper discusses how the collected stories as a whole expressed a conception of what counts as a “good manager” and how management is gendered. In the analysis, the authors discuss whether and how the relationships between gender and management are changing, or the basic assumptions about “think manager-think male” are still valid. The paper illustrates a traditional positioning of gendered management along the lines of rationality vs care, and a third positioning in which the ideal of the “good manager” has both competencies. Originality/value – The authors designed an alternative research strategy focused on how gender and management are discursively constructed within a context of economic crisis that affects management reputation. Particularly, the authors discuss the surprising results concerning how the written stories evaluating male CEOs distrusted the masculine way of managing and positioned the female managing style within a trustworthy context

Sivers distribution functions and the latest SIDIS data

We present an extraction of the Sivers distribution functions from the most recent experimental data of the HERMES and COMPASS experiments, assuming a negligible contribution of sea quark Sivers functions.Comment: To appear in the Proceedings of the XIX International Workshop on Deep-Inelastic Scattering and Related Subjects (DIS 2011), April 11-15, 2011, Newport News, VA USA. Typo corrected in Table

Sivers effect in Drell-Yan processes

The Sivers distributions recently extracted from semi-inclusive deep inelastic scattering data [1] are used to compute estimates for Sivers asymmetries in Drell-Yan processes which are being planned at several facilities (RHIC, COMPASS, J-PARC, PAX, PANDA, NICA (JINR) and SPASCHARM (IHEP)). Most of these asymmetries turn out to be large and could allow a clear test of the predicted sign change of the Sivers distributions when active in SIDIS and Drell-Yan processes. This is regarded as a fundamental test of our understanding, within QCD and the factorization scheme, of single spin asymmetries.Comment: RevTeX4, 12 pages, 23 eps figure

Proteomics of Cytochrome c Oxidase-Negative versus -Positive Muscle Fiber Sections in Mitochondrial Myopathy

The mosaic distribution of cytochrome c oxidase(+) (COX+) and COX - muscle fibers in mitochondrial disorders allows the sampling of fibers with compensated and decompensated mitochondrial function from the same individual. We apply laser capture microdissection to excise individual COX+ and COX- fibers from the biopsies of mitochondrial myopathy patients. Using mass spectrometry-based proteomics, we quantify >4,000 proteins per patient. While COX+ fibers show a higher expression of respiratory chain components, COX- fibers display protean adaptive responses, including upregulation of mitochondrial ribosomes, translation proteins, and chaperones. Upregulated proteins include C1QBP, required for mitoribosome formation and protein synthesis, and STOML2, which organizes cardiolipin-enriched microdomains and the assembly of respiratory supercomplexes. Factoring in fast/slow fiber type, COX (-) slow fibers show a compensatory upregulation of beta-oxidation, the AAA(+) protease AFG3L1, and the OPA1-dependent cristae remodeling program. These findings reveal compensatory mechanisms in muscle fibers struggling with energy shortage and metabolic stress