When non-nationalist voters support ethno-nationalist parties: the 1990 elections in Bosnia and Herzegovina as a prisoner’s dilemma game

In 1990, according to polls, 7 out of 10 citizens of Bosnia and Herzegovina were against ethnic parties. Yet, 75% of voters ended up voting for one of the three main ethno-nationalist parties. In no other post-communist country, including other former Yugoslav republics, did ethnic parties receive such large support in the first democratic elections. In Croatia, for example, in the 1990 elections the Croatian ethnic party Hrvatska demokratska zajednica gathered 42% and the Serb ethnic party Srpska demokratska stranka gathered only 2% of the vote. Were Bosnians and Herzegovinians already that much ethno-nationalistically oriented in 1990? The article rejects this thesis and purports to explain the voting behaviour of the Bosnian electorate by using the prisoner’s dilemma theoretical framework. It concludes by arguing that the problem of collective action could have been addressed via a pre-electoral referendum on a ban of ethnic parties–a ban which had been actually adopted by the then-ruling Communist party, but was eventually overturned by the Constitutional Court of Bosnia and Herzegovina

An integral field spectrograph for SNAP supernova studies

A well-adapted spectrograph concept has been developed for the SNAP (SuperNova/Acceleration Probe) experiment. The goal is to ensure proper identification of Type Ia supernovae and to standardize the magnitude of each candidate by determining explosion parameters. An instrument based on an integral field method with the powerful concept of imager slicing has been designed and is presented in this paper. The spectrograph concept is optimized to have very high efficiency and low spectral resolution (R {approx} 100), constant through the wavelength range (0.35-1.7{micro}m), adapted to the scientific goals of the mission

A Next-Generation Liquid Xenon Observatory for Dark Matter and Neutrino Physics

The nature of dark matter and properties of neutrinos are among the most pressing issues in contemporary particle physics. The dual-phase xenon time-projection chamber is the leading technology to cover the available parameter space for Weakly Interacting Massive Particles (WIMPs), while featuring extensive sensitivity to many alternative dark matter candidates. These detectors can also study neutrinos through neutrinoless double-beta decay and through a variety of astrophysical sources. A next-generation xenon-based detector will therefore be a true multi-purpose observatory to significantly advance particle physics, nuclear physics, astrophysics, solar physics, and cosmology. This review article presents the science cases for such a detector