Phases of a polar spin-1 Bose gas in a magnetic field

The two Bose--Einstein condensed phases of a polar spin-1 gas at nonzero magnetizations and temperatures are investigated. The Hugenholtz--Pines theorem is generalized to this system. Crossover to a quantum phase transition is also studied. Results are discussed in a mean field approximation.Comment: 6 pages, 3 figures, revised versio

Static properties and spin dynamics of the ferromagnetic spin-1 Bose gas in magnetic field

Properties of spin-1 Bose gases with ferromagnetic interaction in the presence of a nonzero magnetic field are studied. The equation of state and thermodynamic quantities are worked out with the help of a mean-field approximation. The phase diagram besides Bose-Einstein condensation contains a first order transition where two values of the magnetization coexist. The dynamics is investigated with the help of the Random Phase Approximation. The soft mode corresponding to the critical point of the magnetic phase transition is found to behave like in conventional theory.Comment: 8 pages and 3 figures included in text, submitted to Physical Review

Kehida-Fövenyes 8–9. századi népességének történeti embertani vizsgálata

In our work, 167 individuals from the Late Avar Period cemetery of Kehida-Fövenyes (8–9th century) were analysed. Altogether 65 children, 36 males and 50 females were examined, however in the case of 16 adults the sex determination was not possible. The newborn age group (0–1 year) is underrepresented in the cemetery. A biological imbalance can be observed between the ratio of males and females. According to the demographic data and pathological changes related to lifestyle and haematological aetiology, sex difference can be seen in the case of adult individuals. Females possessed a higher value of probability of death in almost every age group, and they also were more often affected by haematological disorders than males. The aforementioned phenomena can be related to the fact that women had to deal with physiological and pathophysiological stress originated from pregnancy and menstruation. During the taxonomical analysis, no individuals with clear Mongolid ancestry were identified. However, many skulls determined as Europid ancestry possesses Mongolid traits. The population is mostly characterized by dolichokran skull as Cromagnoid-A and Mediterranean were the most common types. Based on craniometric measurements it was possible to compare the population of Kehida-Fövenyes to other communities from this region what can shed a light of their biological relations. According to the biodistance calculations, males and females might share a different origin, since females showed a closer relation to the Early Avar Period population of the region. While males were rather connected to the Late Avar Period population of present-day Somogy county. During paleopathological investigations, a possible case of leprosy was identified based on the morphological alterations. In more cases paleoradiological investigations were also performed to provide a more reliable diagnosis

Energies and damping rates of elementary excitations in spin-1 Bose-Einstein condensed gases

Finite temperature Green's function technique is used to calculate the energies and damping rates of elementary excitations of the homogeneous, dilute, spin-1 Bose gases below the Bose-Einstein condensation temperature both in the density and spin channels. For this purpose the self-consistent dynamical Hartree-Fock model is formulated, which takes into account the direct and exchange processes on equal footing by summing up certain classes of Feynman diagrams. The model is shown to fulfil the Goldstone theorem and to exhibit the hybridization of one-particle and collective excitations correctly. The results are applied to the gases of ^{23}Na and ^{87}Rb atoms.Comment: 26 pages, 21 figures. Added 2 new figures, detailed discussio

The Dynamics of Mastery Motivation and Its Relationship with Self-Concept in Music Education

Musical education hinges on students’ mastery motivation and self-concept, which are crucial for effective musical learning. Despite the acknowledgement of their individual importance, the relationship between these factors within music education remains unexplored. Hence, this study aimed to investigate the dynamics of mastery motivation (MM) and its relationship with self-concept (SC) in the context of music education. A survey was administered to 139 Hungarian grade 7 students, employing a musical MM questionnaire, a musical SC inquiry, and the collection of demographic information collection. We employed descriptive statistics (IBM SPSS 23), a Rasch analysis (WINSTEPS), and correlational and regression analyses (R programming and SmartPLS4) for data analysis. The findings demonstrated that the utilized instruments were reliable and valid in measuring students’ MM and SC in music education. This study revealed a strong positive correlation (r = 0.778) between students’ MM and SC, with moderate to strong inter-relationships among various subfactors. Furthermore, comparisons unveiled significant disparities in musical MM across school levels, with higher MM and SC observed among female students. Furthermore, gender, a musical family background, and awareness of musical lesson usefulness were predictive factors for both students’ MM and SC within music education. This study provides valuable insights for professionals and policy makers to enhance music education, nurturing students’ musical growth effectively. By understanding the relationship between MM and SC and considering predictive factors, stakeholders can develop strategies that optimize the impact of music education on students’ musical development

Kehida-Fövenyes 8–9. századi népességének történeti embertani vizsgálata

In our work, 167 individuals from the Late Avar Period cemetery of Kehida-Fövenyes (8–9th century) were analysed. Altogether 65 children, 36 males and 50 females were examined, however in the case of 16 adults the sex determination was not possible. The newborn age group (0–1 year) is underrepresented in the cemetery. A biological imbalance can be observed between the ratio of males and females. According to the demographic data and pathological changes related to lifestyle and haematological aetiology, sex difference can be seen in the case of adult individuals. Females possessed a higher value of probability of death in almost every age group, and they also were more often affected by haematological disorders than males. The aforementioned phenomena can be related to the fact that women had to deal with physiological and pathophysiological stress originated from pregnancy and menstruation. During the taxonomical analysis, no individuals with clear Mongolid ancestry were identified. However, many skulls determined as Europid ancestry possesses Mongolid traits. The population is mostly characterized by dolichokran skull as Cromagnoid-A and Mediterranean were the most common types. Based on craniometric measurements it was possible to compare the population of Kehida-Fövenyes to other communities from this region what can shed a light of their biological relations. According to the biodistance calculations, males and females might share a different origin, since females showed a closer relation to the Early Avar Period population of the region. While males were rather connected to the Late Avar Period population of present-day Somogy county. During paleopathological investigations, a possible case of leprosy was identified based on the morphological alterations. In more cases paleoradiological investigations were also performed to provide a more reliable diagnosis

A jó állam mérhetősége II.

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