42 research outputs found
Measurements in two bases are sufficient for certifying high-dimensional entanglement
High-dimensional encoding of quantum information provides a promising method
of transcending current limitations in quantum communication. One of the
central challenges in the pursuit of such an approach is the certification of
high-dimensional entanglement. In particular, it is desirable to do so without
resorting to inefficient full state tomography. Here, we show how carefully
constructed measurements in two bases (one of which is not orthonormal) can be
used to faithfully and efficiently certify bipartite high-dimensional states
and their entanglement for any physical platform. To showcase the practicality
of this approach under realistic conditions, we put it to the test for photons
entangled in their orbital angular momentum. In our experimental setup, we are
able to verify 9-dimensional entanglement for a pair of photons on a
11-dimensional subspace each, at present the highest amount certified without
any assumptions on the state.Comment: 11+14 pages, 2+7 figure
Reducing corruption in a Mexican medical school: impact assessment across two cross-sectional surveys
<p>Abstract</p> <p>Background</p> <p>Corruption pervades educational and other institutions worldwide and medical schools are not exempt. Empirical evidence about levels and types of corruption in medical schools is sparse. We conducted surveys in 2000 and 2007 in the medical school of the Autonomous University of Guerrero in Mexico to document student perceptions and experience of corruption and to support the medical school to take actions to tackle corruption.</p> <p>Methods</p> <p>In both 2000 and 2007 medical students completed a self-administered questionnaire in the classroom without the teacher present. The questionnaire asked about unofficial payments for admission to medical school, for passing an examination and for administrative procedures. We examined factors related to the experience of corruption in multivariate analysis. Focus groups of students discussed the quantitative findings.</p> <p>Results</p> <p>In 2000, 6% of 725 responding students had paid unofficially to obtain entry into the medical school; this proportion fell to 1.6% of the 436 respondents in 2007. In 2000, 15% of students reported having paid a bribe to pass an examination, not significantly different from the 18% who reported this in 2007. In 2007, students were significantly more likely to have bribed a teacher to pass an examination if they were in the fourth year, if they had been subjected to sexual harassment or political pressure, and if they had been in the university for five years or more. Students resented the need to make unofficial payments and suggested tackling the problem by disciplining corrupt teachers. The university administration made several changes to the system of admissions and examinations in the medical school, based on the findings of the 2000 survey.</p> <p>Conclusion</p> <p>The fall in the rate of bribery to enter the medical school was probably the result of the new admissions system instituted after the first survey. Further actions will be necessary to tackle the continuing presence of bribery to pass examinations and for administrative procedures. The social audit helped to draw attention to corruption and to stimulate actions to tackle it.</p
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Latina subjectivity, sexuality and sensuality
This introductory essay considers the connections and contradictions of Latina sexuality and sensuality. It critiques the “othering” practices of hegemonic representation by studying the ways the “Madonna/Whore Complex” has affected the cultural specificity of the Latina body and its reception. It includes an analysis of the film by Lourdes Portillo, A conversation with academics about Selena (1999), in which leading Chicana intellectuals (i.e., Cherríe Moraga and Sandra Cisneros among others) discuss the impact of Selena's life and death on the community as well as her sensual brown body
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“Invisible wars”: Gendered terrorism in the US military and the Juárez Feminicidio
This wide-ranging collection of essays elaborates on some of the most pressing issues in contemporary postcolonial society in their transition from conflict and contestation to dialogue and resolution. It explores from new angles questions of violent conflict, forced migration, trafficking and deportation, human rights, citizenship, transitional justice and cosmopolitanism. The volume focuses more specifically on the gendering of violence from a postcolonial perspective as it analyses unique cases that disrupt traditional visions of violence by including the history of empire and colony, and its legacies that continue to influence present-day configurations of gender, race, nationality, class and sexuality. Part One maps out the gendered and racialized contours of conflict zones, from war zones, prisons and refugee camps to peacekeeping missions and humanitarian aid, reframing the field and establishing connections between colonial legacies and postcolonial dynamics. Part Two explores how these conflict zones are played out not just outside but also within Europe, demonstrating that multicultural Europe is fraught with different legacies of violence and postcolonial melancholia. Part Three gives an idea of the kind of future that can be offered to post-conflict societies, defined as contact zones, by exploring opportunities for dialogue, restoration and reconciliation that can be envisaged from a gendered and postcolonial perspective through alternative feminist practices and the work of art and their redemptive power in mobilizing social change or increasing national healing processes. Though strongly anchored in postcolonial critique, the chapters draw from a range of traditions and expertise, including conflict studies, gender theory, visual studies, (new) media theory, sociology, race theory, international security studies and religion studies
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Latina subjectivity, sexuality and sensuality
This introductory essay considers the connections and contradictions of Latina sexuality and sensuality. It critiques the “othering” practices of hegemonic representation by studying the ways the “Madonna/Whore Complex” has affected the cultural specificity of the Latina body and its reception. It includes an analysis of the film by Lourdes Portillo, A conversation with academics about Selena (1999), in which leading Chicana intellectuals (i.e., Cherríe Moraga and Sandra Cisneros among others) discuss the impact of Selena's life and death on the community as well as her sensual brown body