Hierarchical Data Representation Model - Multi-layer NMF

In this paper, we propose a data representation model that demonstrates hierarchical feature learning using nsNMF. We extend unit algorithm into several layers. Experiments with document and image data successfully discovered feature hierarchies. We also prove that proposed method results in much better classification and reconstruction performance, especially for small number of features. feature hierarchies

Resonant SIMP dark matter

We consider a resonant SIMP dark matter in models with two singlet complex scalar fields charged under a local dark $U(1)_D$. After the $U(1)_D$ is broken down to a $Z_5$ discrete subgroup, the lighter scalar field becomes a SIMP dark matter which has the enhanced $3\rightarrow 2$ annihilation cross section near the resonance of the heavier scalar field. Bounds on the SIMP self-scattering cross section and the relic density can be fulfilled at the same time for perturbative couplings of SIMP. A small gauge kinetic mixing between the SM hypercharge and dark gauge bosons can be used to make SIMP dark matter in kinetic equilibrium with the SM during freeze-out.Comment: 14 pages, 5 figures, Improved discussion on thermal-averaged annihilation cross sectio

Inflection point inflation and reheating

We revisit the inflection point inflation with an extended discussion to large field values and consider the reheating effects on the inflationary predictions. Parametrizing the reheating dynamics in terms of the reheating temperature and the equation of state during inflation, we show how the observationally favored parameter space of inflection point inflation is affected by reheating dynamics. Consequently, we apply the general results to the inflation models with non-minimal coupling, such as the SM Higgs inflation and the $B-L$ Higgs inflation.Comment: 27 pages, 8 figures, Improved discussion on general inflection point inflatio

A multifaceted approach to understanding schizoid personality across behavioral, intrapsychic, and interpersonal domains

The aim of the present study was to gain a comprehensive understanding of the interaction amongst the behavioral, intrapsychic, and interpersonal domains of schizoid personality. A sample of 227 Massively Multiplayer Online Role-Playing Games (MMORPG) players, ages 18 to 30, completed online self-report measures concerning maladaptive personality traits and several aspects of interpersonal functioning. The sample also provided narratives for Thematic Apperception Test (TAT) cards that were coded by the Mutuality of Autonomy Scale for the TAT (MOA-TAT) to measure schizoid self-other representations. Results showed that schizoid personality could be understood as a dimensional construct, specifically as a constellation of maladaptive personality trait facets of anhedonia, intimacy avoidance, withdrawal, and restricted affectivity according to the Alternative Model for Personality Disorders (AMPD). However, the relationship between schizoid personality and cold and socially avoidant interpersonal problems was not mediated by schizoid self-other representations, which are characterized by the intrapsychic fear of engulfment and traumatic impingement by others. Significant predictions of schizoid characteristics on interpersonal problems, values, and sensitivities allowed for an integrated understanding of how intrapsychic processes can affect various dimensions of interpersonal functioning in schizoid personality. An argument is made for the continued integration of scientific research and clinical observations to paint a more comprehensive picture of this understudied phenomena. Limitations of the study, clinical implications, and directions for future research are discussed

Forbidden Channels and SIMP Dark Matter

In this review, we focus on dark matter production from thermal freeze-out with forbidden channels and SIMP processes. We show that forbidden channels can be dominant to produce dark matter depending on the dark photon and / or dark Higgs mass compared to SIMP.Comment: 5 pages, Prepared for the proceedings of the 13th International Conference on Gravitation, 3-7 July 201

SIMP dark matter and its cosmic abundances

We give a review on the thermal average of the annihilation cross-sections for $3\rightarrow 2$ and general higher-order processes. Thermal average of higher order annihilations highly depend on the velocity of dark matter, especially, for the case with resonance poles. We show such examples for scalar dark matter in gauged $Z_3$ models.Comment: 5 pages, 2 figures, Prepared for the proceedings of the 13th International Conference on Gravitation, 3-7 July 201

Cosmic abundances of SIMP dark matter

Thermal production of light dark matter with sub-GeV scale mass can be attributed to $3\rightarrow 2$ self-annihilation processes. We consider the thermal average for annihilation cross sections of dark matter at $3\rightarrow 2$ and general higher-order interactions. A correct thermal average for initial dark matter particles is important, in particular, for annihilation cross sections with overall velocity dependence and/or resonance poles. We apply our general results to benchmark models for SIMP dark matter and discuss the effects of the resonance pole in determining the relic density.Comment: 21 pages, 6 figures, Version to appear in Journal of High Energy Physic