Uniqueness of Weak Solutions for the Normalised Ricci Flow in Two Dimensions

We show uniqueness of classical solutions of the normalised two-dimensional Hamilton-Ricci flow on closed, smooth manifolds for smooth data among solutions satisfying (essentially) only a uniform bound for the Liouville energy and a natural space-time $L^2$-bound for the time derivative of the solution. The result is surprising when compared with results for the harmonic map heat flow, where non-uniqueness through reverse bubbling may occur

Explaining post-apartheid South African human rights foreign policy: unsettled identity and conflicting interests

The end of apartheid in 1994 brought with it many expectations – both domestically and internationally – about the kind of state the new South Africa would be and the foreign policies it would pursue, with many expecting South Africa to pursue a human rights-based foreign policy. However, South Africa has pursued a much more paradoxical foreign policy, with significant gaps between its stated commitment to human rights principles and its action in support of those principles. This article seeks to explain these gaps. Delving into the literature on norms-based and interest-based explanations of state behavior, it argues that both approaches help to explain South Africa’s foreign policy actions. However, it is the unsettled nature of its identities and interests after 1994, as its leaders (in particular Thabo Mbeki) sought to reconcile a commitment to democracy and human rights with equally strong (if not greater) commitments to Afrocentrism and anti-imperialism, which provides the most interesting avenues for exploration

Religion and Spirituality in Nevada

Across the world, religion is integral to society insofar it shapes people’s thoughts, behaviors, and interactions. What exactly the term “religion” means, however, is far from clear-cut, as it continues to be a highly charged topic of discussion and debate, a subject that many hold dear and near to their hearts. There seem to be just as many ways to define religion as there are groups and denominations that claim to hold the key to the “meaning of life” and even solve humanity’s woes. For many people, the word religion evokes shared ideas of church, gatherings, worship, prayer, music, traditions, and pilgrimages. Some of these images fit in with the “mainstream” meanings of religion, at least in terms of the practices of organized and institutionalized religion recognized in the United States. For other people, religion harbors meanings that go beyond the mainstream norms and that conflict with more familiar ideas of religion and religiosity. The rich diversity of the U.S. population reflects the amalgam of conventional and unconventional religious belief systems that coexist on a day-to-day basis. For the most part, the adherents of broad types of belief systems appear to tolerate one another, at least enough to function in a civil manner under the banner of an overarching “civil religion” (Bellah, 1967). Still, the nation has its share of religious conflict, and there are many examples of believers with clashing ideas and practices who struggle to have their voices heard and defend their religious convictions. Although Americans enjoy the rights to religious freedom and diversity guaranteed by the First Amendment to the U.S. Constitution, conflicts exist over the interpretation of freedom of religion versus freedom from religion. And debates about the Christian origins of the U.S. – often fueled by a Christian majority that makes up some 80% of the U.S. population – provide plenty of fodder for the so-called “culture wars” (Hunter, 1991; Borer & Murphree, 2008; Borer & Schafer, 2011). Conflicts over competing religious belief systems and worldviews do not necessarily imply social strife. Debates about the origins and the meanings of life and how they connect to our identities may foster healthy discussions and promote tolerance and pluralism. Motivated by presumed relations to a higher power or cause, religious groups have also been at the forefront of social activism and change. Though it is not always the case, conflicts between religious groups, and between religious groups and their secular counterparts, can lead to better understandings of diverse beliefs and practices and promote the social health of a nation, a state, and a community. Thus, we start with the proposition that religious diversity is central to the social health and well-being of human collectivities

Gender Performance in Womens\u27 Mixed Martial Arts

Academic research has typically focused on men who practice Mixed Martial Arts and their expression of hyper-masculinity. There is a lack of comparative work which examines women who practice MMA as a sport. This article aims to address this oversight by exploring the meaning and importance of the sports for women. The main focus is to explore how women navigate and “perform gender” in the patriarchal subculture of MMA. Drawing on a “grounded theory” approach, semi-structured interviews, content analysis, and participant observation, I developed a preliminary model of female Mixed Martial Artist. I examine three female fighter “types” (“Feminine inclined female Fighters,” “Neutral female fighters,” and “Masculine inclined female fighters”) and explore different aspects of gender performance which helped to signify these. In my research I discovered that in MMA there is a “gender order.” Many times when the gender order is disrupted women seek to recreate it. This results in the adaptation and navigation of the three fighter types that I mentioned previously. I also found that on many occasions women “purposely perform” a gender type making it an “explicit performance.” My findings demonstrate the need to consider the range and diversity of women’s fighter types. Further research should elaborate on the process of constructing a “gender order” amongst woman as well as the sociocultural expectations of female fighters. Other research should also investigate how “gender order” applies to other social worlds such as non-combat sports and other leisure activities, work and occupations, and everyday life

First results with the ORPHEUS dark matter detector

The ORPHEUS dark matter detector is operating at our underground laboratory in Bern (70 m.w.e.). The detector relies on measuring the magnetic flux variation produced by weakly interacting massive particles (WIMPs) as they heat micron-sized superheated superconducting tin granules (SSG) and induce superconducting-to-normal phase transitions. In an initial phase, 0.45 kg of tin granules in a segmented detector volume have been used. In this paper a general description of the experimental set-up, overall performance of the detector, and first results are presented.Comment: 20 pages, Latex, submitted to Astropart. Phy