Lattice Hamiltonian approach to the Schwinger model: further results from the strong coupling expansion

We employ exact diagonalization with strong coupling expansion to the massless and massive Schwinger model. New results are presented for the ground state energy and scalar mass gap in the massless model, which improve the precision to nearly $10^{-9}$. We also investigate the chiral condensate and compare our calculations to previous results available in the literature. Oscillations of the chiral condensate which are present while increasing the expansion order are also studied and are shown to be directly linked to the presence of flux loops in the system.Comment: 7 pages, 6 figures, to appear in PoS(Lattice 2014)31

Characteristic of cells isolated from human Abdominal Aortic Aneurysm samples cultured in vitro

Abstract Background: This study aimed to standardize cell culture methods for major cell types isolated from three layers of human AAA. We also aimed to determine cell types in each layer of each AAA segment and compare them with cell types in layers of control, unchanged segments. Material and methods We divided AAAs into three segments along the AAA and control segments flanking the aneurysm. Isolated cells following expansion were analyzed by flow cytometry, immunochemistry and microscopic methods. Fluorochrome-conjugated antibodies were used to detect the three major cell types (endothelial cells, smooth muscle cells, and fibroblasts) in each layer of every AAA segment. Results: Culture of cells from the three AAA segments was successfully established in 21% of patients. In all of the layers, only a small proportion of cells showed layer- specific markers of cell types. The majority of cells from every layer were positive for CD90, which is considered specific marker of fibroblasts in the aorta. Conclusions: We describe methodology for isolation of cells, their culture conditions, and phenotypic characterization for AAA. The wall of AAA loses its specific types of cells in all of the layers compared with the normal abdominal aortic wall

A fény törése és visszaverése homogén isotrop átlátszó testek határán Neumann módszerének általánosításával és bővítésével

We present results of applying the Hamiltonian approach to the massless Schwinger model. A finite basis is constructed using the strong coupling expansion to a very high order. Using exact diagonalization, the continuum limit can be reliably approached. This allows to reproduce the analytical results for the ground state energy, as well as the vector and scalar mass gaps to an outstanding precision better than 10^−6%

NOWE STANOWISKA ŻAGWICY LISTKOWA TEJ GRIFOLA FRONDOSA (Dicks .) GRAY W PARKU KRAJOBRAZOWY m im. g en. DEZYDEREGO CHŁAPOWSKIEGO

The paper presents the Grifola frondosa distribution in the central part of the General Dezydery Chłapowski Landscape Park. 14 fruit bodies of the species were found developing on 8 specimens of Quercus robur, located in rural parks, tree belts along roads and tree alleys

The lichen biota of Pinus sylvestris under the impact of some stand-related factors: a case study from the South-Eastern part of Zerków-Czeszewo Landscape Park (Wielkopolska-Kujawy Lowland)

A lichenological inventory was conducted in the pine stands in the south-eastern region of Żerków-Czeszewo Landscape Park. The aim of this study was to recognize the lichen species diversity on the bark of Pinus sylvestris by considering tree age and forest habitat type. In total, 26 species of lichenized fungi were found on the bark of P. sylvestris. The biota comprises common and widespread species in Poland. Tree age positively and significantly influenced the species richness on the bark of P. sylvestris. The suitability of the pine tree age for lichens evident as alpha diversity seemed to be independent from the habitat of the trees. The age of phorophytes strongly affected the presence of Hypocenomyce scalaris. Mixed fresh coniferous forests were characterized by higher beta- and gamma diversity compared to fresh coniferous forests. There was no correlation between the number of species per tree (alpha diversity) and diversification of species composition in relation to the distance between pines. The findings indicate that maintenance of a variety of phorophytes and age-diversified tree stands can prevent impoverishment of the lichen biota in the south-eastern part of Żerków-Czeszewo Landscape Park

Neural Identification of a Temperature Field in the Storing Phase of Thermal Energy in Rock Bed Thermal Storage

Thermal energy stored within a rock bed thermal storage system, which is mostly used in agriculture, can be identified during the storage phase using mathematical models based on heat transfer, which concerns batteries running in a vertical setting. However, this requires the conversion of differential equations into algebraic equations, as well as knowledge about the initial and boundary conditions. Furthermore, a lack of information or incomplete information about the initial conditions makes it difficult or impossible to evaluate the volume of stored energy, or can cause significant errors during evaluation. Such situations occur in systems equipped with a rock battery, in which solar collectors act as source of energy. Considering the above, as well as the lack of a model for batteries in a vertical setting, we identified the need for research into the storage phase of rock bed thermal storage systems, working in a horizontal setting, and generating MLP-type neural models. Among these models, MLP 4-7-1 turned out to be the best both in terms of the values of regression statistics and possibilities of generalization. According to the authors, artificial neural models depicting temperature changeability in storage phase will be helpful in the development of a new methodology that can predict the heat volume in rock bed thermal storage systems

Personal determinants of body image considering people practicing physical activity

The concept of body image can be considered on many levels, but constant is the fact that it is a mental image: of the size, shape, and form of one’s own body, influencing one’s overall self-image. Previous multifaceted research shows that perceptions of body image can be influenced among other things by physical activity or personality. Therefore, the purpose of this study was to analyze the relationships between body image perception and personality, considering individuals who regularly practice physical activity (N= 104). The following research tools were used: IPIP-BFM-20, Body Esteem Scale and a questionnaire consisting of questions allowing for the respondents’ characterization. Analysis of the collected data revealed that almost half of the respondents are currently dissatisfied with their body image. It was also noted that those who were satisfied with their body image scored statistically significantly higher on two of the five personality traits measured: Extraversion and Emotional Stability. The results obtained showing the relationship between personality and body image perception are consistent with previous studies in which the type of physical activity and its frequency were not examined