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Search Results: 1 - 10 of 387 matches for " Justyna Dabrowska "
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Does Dividend Policy Follow the Capital Structure Theory?
Justyna Franc-Dabrowska
Managing Global Transitions , 2009,
Abstract: Decisions concerning the most optimal choice of financing sources and dividend policy are some of the most difficult financial decisions. This article presents the results of research concerning relationships between two capital structure theories (hierarchy theory and substitution theory) and dividend payment policies in Polish stock companies of the agricultural and foodstuff sector (2001–2006). The research hypothesis was verified positively; company management limits dividend payment according to the hierarchy theory and prefers internal sources of financing economic activities. In order to verify the hypothesis, the methods of descriptive analysis, financial analysis and descriptive statistics were applied, together with a fixed effects model.
Immune system as a new therapeutic target for antibiotics  [PDF]
Brygida Kwiatkowska, Maria Maslinska, Malgorzata Przygodzka, Joanna Dmowska-Chalaba, Justyna Dabrowska, Katarzyna Sikorska-Siudek
Advances in Bioscience and Biotechnology (ABB) , 2013, DOI: 10.4236/abb.2013.44A013

Since the discovery of penicillin by Fleming in 1928, the knowledge of the antibiotics’ spectrum and mechanism of action has been steadily increasing. Antibiotics became an effective tool in the fight against many pathogens, changing the prognosis of outcome for many serious diseases. It is already known that antibiotics not only have the antibacterial activity, but many of theme.g. macrolides, sulphonamides and tetracyclineshave immunomodulating effect, affecting functions of lymphocytes, macrophages and costimulatory molecules, macrophage migration and phagocytosis, as well as proinflammatory cytokine secretion. The expanding knowledge of the effects of antibiotics on the immune system has brought with it new applications of antibiotics in organ transplantation, invasive cardiology and treatment of autoimmune diseases such as rheumatoid arthritis or asthma.

State of global fisheries – trends and predictions
Alicja Dabrowska
Contemporary Economy , 2012,
Abstract: As human population on Earth has just reached seven billion, food, freshwater and energy supplies are of increasing concern. With fisheries supporting hundreds of millions livelihoods and most of the global capture fisheries production coming from the marine environment, sustainable management of fishing activity based on sound scientific data and reasonable predictions is one of the major issues we face these days. Literature review of the most recent publications on the state of global fisheries was conducted and ten main trends were identified, including expansion of fishing to new ecosystems and species, decline in landings, increase in fishing effort, growth of aquaculture and changes in the abundance and distribution of species. Issues with predicting the future were discussed, as well as usefulness of computer models and possible recovery of the ecosystem.
La signification changeante des souvenirs matériels chez les immigrés juifs polonais d’après-guerre en Isra l Relocating significance of materialized memories among postwar Jewish immigrants from Poland
Kamila Dabrowska
Bulletin du Centre de Recherche Fran?ais de Jérusalem , 2012,
Abstract: The article is based on research made among Polish Jews who lived after the war in Lower Silesia region and in 1950s or in 1960s emigrated to Israel. I will show the two waves of emigration, concentrating on how they differentiate in constructing the image of Poland – both the past one and the contemporary one. My interviewees were mainly children of people who survived the Second World War in the Soviet Union. Their parents were convinced that Poland is not only hosting country Jews lived for centuries, but their homeland. Different levels of Jewishness coexisted with identification as Poles. Even though the discussions on return to Israel, were part of the collective consciousness, till the moment of the outbreak of the anti-Semitic events, they underlined rooting in Poland or were constantly living “on suitcases”, as they say, hesitating whether to leave or to stay. The external events made them decide to leave Poland. However, the imagine of abandoned homeland is being kept in their memories, being an important part of their self-identification.Are presented the immigrants’ attitude towards the mythologized past they incorporated to their life stories narratives. Immigrants cope with the absence of the past through creation of memories, embodied in and evoked by objects. The meaning inscribed to a particular object changes, depending on fluctuation of memories’ significance. An important part of their memory is related to the traumatic recollections. It is both the post memory inherited from their parents who survived the Holocaust and their own ones connected with an uprooting process caused by the anti-Semitism in the postwar Poland. These negative memories mingle with idealistic ones from their childhood and youth in the communist Poland and with most recent ones from their nostalgic journeys to Poland (both individual and group ones), they went on after 1989. Those memories are also embodied in the particular objects, among which photographs play a crucial role.
Continuous observation of a squeezed coherent state
Anita Dabrowska
Physics , 2006,
Abstract: The main aim of the paper is to present the analytical solution of the Belavkin quantum filtering equation for damped harmonic oscillator being initially in the squeezed coherent state for diffusion observation with complex white noise. The comparison of the a priori and a posteriori mean value of the optical quadrature operators and the photon number operator is given.
Decreased CD127 Expression on CD4+ T-Cells and Elevated Frequencies of CD4+CD25+CD127? T-Cells in Children with Long-Lasting Type 1 Diabetes
Marcin Moniuszko,Barbara Glowinska-Olszewska,Malgorzata Rusak,Marta Jeznach,Kamil Grubczak,Danuta Lipinska,Robert Milewski,Anna Justyna Milewska,Milena Dabrowska,Ewa Jablonska,Adam Kretowski,Maria Gorska,Anna Bodzenta-Lukaszyk,Artur Bossowski
Journal of Immunology Research , 2013, DOI: 10.1155/2013/459210
Abstract: Pathobiology of type 1 diabetes (T1D) is predominantly associated with T-cell-related actions. Homeostasis of majority of T-cells is critically dependent on signals mediated by CD127 (interleukin-7 receptor, IL-7R). In contrast, regulatory T-cells express very little CD127 and thereby may be delineated by CD4+CD25+CD127? phenotype. Here we aimed to analyze CD127 expression on CD4+ and CD8+ T-cells and enumerate CD4+CD25+CD127? T-cells in long-lasting T1D. T-cells were analyzed by flow cytometry and immunologic data were correlated with vascular, metabolic, and inflammatory parameters. We demonstrated significantly decreased CD127 levels on CD4+, but not CD8+, T cells in T1D pediatric patients. Interestingly, frequencies of CD4+CD25+CD127? T-cells were significantly enhanced in T1D children and correlated well with frequencies of CD34+CD144+ endothelial progenitor cells and CD4+CD25? T-cells. Levels of CD127 on both CD4+ and CD8+ T-cells in T1D patients were not correlated to each other or HbA1C. Interestingly, however, CD127 levels on CD4+ T-cells were significantly correlated to frequencies of CD4+CD25+CD127? T-cells, whereas CD127 levels on CD8+ T-cells were significantly correlated to concentrations of VEGF and triglycerides. Our data indicate that CD127 expression is differentially modulated on CD4+ and CD8+ T-cells in the course of T1D. Moreover, we demonstrated that, in contrast to recent-onset T1D, long-lasting T1D is associated with enhancement of T-cells with regulatory phenotype.
Estimation in a class of semiparametric transformation models
Dorota M. Dabrowska
Mathematics , 2005, DOI: 10.1214/074921706000000437
Abstract: We consider estimation in a class of semiparametric transformation models for right--censored data. These models gained much attention in survival analysis; however, most authors consider only regression models derived from frailty distributions whose hazards are decreasing. This paper considers estimation in a more flexible class of models and proposes conditional rank M-estimators for estimation of the Euclidean component of the model.
Quantile regression in transformation models
Dorota M. Dabrowska
Mathematics , 2005,
Abstract: Conditional quantiles provide a natural tool for reporting results from regression analyses based on semiparametric transformation models. We consider their estimation and construction of confidence sets in the presence of censoring.
Information bounds and efficient estimation in a class of censored transformation models
Dorota M. Dabrowska
Mathematics , 2006,
Abstract: Transformation models provide a common tool for regression analysis of censored failure time data. The most common approach towards parameter estimation in these models is based on the nonparametric profile likelihood method. Several authors proposed also ad hoc M-estimators of the Euclidean component of the model. These estimators are usually simpler to impelement and many of them have good practical performance. In this paper we consider the form of the information bound for estimation if the Euclidean parameter of the model and propose a modification of inefficient M-estimators to one-step maximum likelihood estimates.
Justyna Stypinska
Studia Humanistyczne (Kraków. 2003) , 2010,
Abstract: The article focuses on the various approaches to the phenomenon of old age in Poland from the perspective of social constructionism in sociology. It attempts to demonstrate that the de nition of old age is not a primitive notion of essentialist character, but a set of meanings that are permanently transformed and negotiated depending on the social contexts in which they are deployed. The concept of social constructionism of Peter Berger and Thomas Luckmann serves as a theoretical prism for the analysis of the empirical material. The empirical material consists of a set of texts and commentaries from the readers and users of the Internet portal GazetaWyborcza and the report “Is Poland a country for old men?”. The major guideline for the analysis of the empirical material was to identify the major themes and spheres of social life discussed among the readers and Internet users. The subsequent steps were: synthesis and interpretation of the results.The analysis showed that the main concerns regarding the topic of old age are the following: public space as a place of alienation or even perhaps “invisibility” of older people, the labour market as an area of domination of young people, media described as the “dictatorship of young faces”, and the usage of new technologies by seniors.
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