Gender Quotas and Women’s Political Participation in Slovenia and Croatia: When Similar Historical Developments and Homogeneity of Design Yield Different Outcomes

This paper aims at summarizing the knowledge surrounding gender quotas – which are a quick gate-way to women’s political participation – and at assessing the efficacy of their different means of implementation. Through the cross-national study of Slovenia and Croatia (two countries similar on almost every political, social, and historical development except for women’s political representation) and in tandem with an extensive review of previous works in the literature, this paper sheds some light on the techniques the civil society and feminist/women’s movements could use to maximize their political impact and overall gender-quota effectiveness. Indeed, this paper finds that by appealing to the voters and the public during the election period, raising its awareness on key issues, such as gender-equality, informal barriers of entry for women, “the secret garden of nomination” and most importantly party male-dominated “traditionalism”, women’s movements will elicit maximum party response. By attacking directly the nexus of the parties’ survival, namely the votes, at an inopportune moment, namely during the elections, instead of using legislative and lobbying means, women’s movements will maximize their chances of overcoming the innate limitations of an inefficient gender-quota

Bayesian inference of Gaussian mixture models with noninformative priors

This paper deals with Bayesian inference of a mixture of Gaussian distributions. A novel formulation of the mixture model is introduced, which includes the prior constraint that each Gaussian component is always assigned a minimal number of data points. This enables noninformative improper priors such as the Jeffreys prior to be placed on the component parameters. We demonstrate difficulties involved in specifying a prior for the standard Gaussian mixture model, and show how the new model can be used to overcome these. MCMC methods are given for efficient sampling from the posterior of this model.Comment: 26 pages 10 figure

Gamma-ray Timing of Redback PSR J2339-0533: Hints for Gravitational Quadrupole Moment Changes

We present the results of precision gamma-ray timing measurements of the binary millisecond pulsar PSR J2339$-$0533, an irradiating system of "redback" type, using data from the Fermi Large Area Telescope. We describe an optimized analysis method to determine a long-term phase-coherent timing solution spanning more than six years, including a measured eccentricity of the binary orbit and constraints on the proper motion of the system. A major result of this timing analysis is the discovery of an extreme variation of the nominal 4.6-hour orbital period $P_{\rm orb}$ over time, showing alternating epochs of decrease and increase. We inferred a cyclic modulation of $P_{\rm orb}$ with an approximate cycle duration of 4.2 years and a modulation amplitude of $\Delta P_{\rm orb}/ P_{\rm orb} = 2.3 \times 10^{-7}$. Considering different possible physical causes, the observed orbital-period modulation most likely results from a variable gravitational quadrupole moment of the companion star due to cyclic magnetic activity in its convective zone.Comment: 9 pages, 2 figure

Optimized Blind Gamma-ray Pulsar Searches at Fixed Computing Budget

The sensitivity of blind gamma-ray pulsar searches in multiple years worth of photon data, as from the Fermi LAT, is primarily limited by the finite computational resources available. Addressing this "needle in a haystack" problem, we here present methods for optimizing blind searches to achieve the highest sensitivity at fixed computing cost. For both coherent and semicoherent methods, we consider their statistical properties and study their search sensitivity under computational constraints. The results validate a multistage strategy, where the first stage scans the entire parameter space using an efficient semicoherent method and promising candidates are then refined through a fully coherent analysis. We also find that for the first stage of a blind search incoherent harmonic summing of powers is not worthwhile at fixed computing cost for typical gamma-ray pulsars. Further enhancing sensitivity, we present efficiency-improved interpolation techniques for the semicoherent search stage. Via realistic simulations we demonstrate that overall these optimizations can significantly lower the minimum detectable pulsed fraction by almost 50% at the same computational expense.Comment: 22 pages, 13 figures; includes ApJ proof correction

Crossed Andreev reflection as a probe for the pairing symmetry of Ferromagnetic Superconductors

The coexistence of superconductivity and ferromagnetism has brought about the phenomena of ferromagnetic superconductors. The theory needed to understand the compatibility of such antagonistic phenomena cannot be built until the pairing symmetry of such superconductors is correctly identified. The proper and unambiguous identification of the pairing symmetry of such superconductors is the subject of this paper. This work shows that crossed Andreev reflection can be a very effective tool in order to identify the pairing symmetry of these superconductors.Comment: 5 pages, 1 figure, 1 table. Accepted for publication in Phys. Rev. B(Rapid Communication