66 research outputs found
Enhancing surface charge dissipation of Melt-electrospun 3D printed scaffolds for the fabrication of tall and well-ordered architectures
No full textThis two-part project undertaken at QUT and the University of Wurzburg focused on a 3D printing technology known as Melt-electrospinning. In the first part, a melt electrospinner device was designed and assembled to fabricate tissue engineering scaffolds. An air ioniser was then then used to investigate the effects of reduced surface charge on the scaffolds such as to improve the output and height of the printed structure. The goal of the second project was to fabricate scaffolds using an electro-active polymer capable of altering its shape when placed within an electric field
The Macroeconomic Determinants of Life Expectancy in Poland
No full textThe paper begins with the discussion of a cause-and-effect econometric model describing life expectancy in Poland in three variants: for men, women, and both sexes at the same time. The analysis is preceded by a brief review of research reports on the subject, with a special focus on empirical applications in the context of adequate explanatory variables. The estimation of the parameters was made with the use of a stepwise regression method, while the final version of the model was selected on the basis of a reliable statistical test, the author says. The research shows that the following variables had a statistically significant impact on life expectancy in Poland in the analyzed period (1975-2005): urbanization, the quality of healthcare, human capital, incomes, economic inequalities, social capital, behavioral factors, and the natural environment. However, the relative impact of these factors on life expectancy differed substantially for men and women, Florczak says. In the second part of the article, the author proposes a model breaking down the population by sex and age, with the use of a “top-down modeling strategy.” The parameters of the Gompertz mortality law and a logistic function were estimated for each year, with the entire population divided into coherent age groups. The resulting demographic model makes it possible to draw up forecasts and simulation scenarios taking into account links between the economic and demographic determinants of growth, Florczak says
Zofia Florczak i jej spuścizna w zbiorach specjalnych Książnicy Pedagogicznej im. A. Parczewskiego w Kaliszu
No full textThe article aims to commemorate Zofia Florczak (1912-1996), a teacher with a Ph.D. in Polish philology, a scoutmaster, the last chief of the Polish Scouting Association for Girls before it was taken over and dissolved by the communist authorities. In 1954 she started working at the Institute of Literary Research of the Polish Academy of Sciences, the Laboratory of Theoretical Poetics and Literary Language. She is the author of studies of the history of female scouting, researcher of the history of linguistics, and the author of valuable works in this field. The aim of the paper is also to present the legacy of Z. Florczak, preserved in the special collection of the Alfons Parczewski Pedagogical Library in Kalisz. Her heritage consists of workshop materials, notes, typescripts of her works, correspondence, as well as other materials related to her interests and scientific activity
Makroekonomiczne uwarunkowania oczekiwanej długości życia w Polsce
No full textThe paper begins with the discussion of a cause-and-effect econometric model describing life expectancy in Poland in three variants: for men, women, and both sexes at the same time. The analysis is preceded by a brief review of research reports on the subject, with a special focus on empirical applications in the context of adequate explanatory variables. The estimation of the parameters was made with the use of a stepwise regression method, while the final version of the model was selected on the basis of a reliable statistical test, the author says. The research shows that the following variables had a statistically significant impact on life expectancy in Poland in the analyzed period (1975-2005): urbanization, the quality of healthcare, human capital, incomes, economic inequalities, social capital, behavioral factors, and the natural environment. However, the relative impact of these factors on life expectancy differed substantially for men and women, Florczak says. In the second part of the article, the author proposes a model breaking down the population by sex and age, with the use of a “top-down modeling strategy.” The parameters of the Gompertz mortality law and a logistic function were estimated for each year, with the entire population divided into coherent age groups. The resulting demographic model makes it possible to draw up forecasts and simulation scenarios taking into account links between the economic and demographic determinants of growth, Florczak says
Efektywna podaż pracy a wzrost gospodarczy
No full textThe article discusses the relationship between effective labor supply—determined by factors that are linked either directly or indirectly with human capital—and sustained economic growth per capita. On the basis of an expanded Mincer wage equation, the author estimates effective labor supply, taking into account effects linked with human capital, and conducts an econometric analysis of changes in the average working time in Poland in 1970-2005. The author zeroes in on long-term relationships and checks the results of his analysis against a body of statistical data. The diagnostic tools used by the author include the Gauss-Markov theorem, a method for evaluating statistical errors developed by mathematicians Carl Friedrich Gauss and Andrey Markov. According to Florczak, standard labor supply analyses are often inaccurate because they overlook factors linked with working time, the quality of labor, and the overall social and demographic conditions. In an era of globalization, the author says, if it wants to maintain its international economic competitiveness, Poland should increase the role of “extensive” factors of production by boosting the economic activity of the population
Effective Labor Supply and Economic Growth
No full textThe article discusses the relationship between effective labor supply-determined by factors that are linked either directly or indirectly with human capital-and sustained economic growth per capita. On the basis of an expanded Mincer wage equation, the author estimates effective labor supply, taking into account effects linked with human capital, and conducts an econometric analysis of changes in the average working time in Poland in 1970-2005. The author zeroes in on long-term relationships and checks the results of his analysis against a body of statistical data. The diagnostic tools used by the author include the Gauss-Markov theorem, a method for evaluating statistical errors developed by mathematicians Carl Friedrich Gauss and Andrey Markov. According to Florczak, standard labor supply analyses are often inaccurate because they overlook factors linked with working time, the quality of labor, and the overall social and demographic conditions. In an era of globalization, the author says, if it wants to maintain its international economic competitiveness, Poland should increase the role of “extensive” factors of production by boosting the economic activity of the population
Enhancing Surface Charge Dissipation of Melt-electrospun 3D Printed Scaffolds for the Fabrication of Tall and Well-ordered Architectures
No full textShaping Synthetic Multicellular and Complex Multimaterial Tissues via Embedded Extrusion‐Volumetric Printing of Microgels
No full textIn living tissues, cells express their functions following complex signals from their surrounding microenvironment. Capturing both hierarchical architectures at the micro- and macroscale, and anisotropic cell patterning remains a major challenge in bioprinting, and a bottleneck towards creating physiologically-relevant models. Addressing this limitation, we introduced a novel technique, termed Embedded Extrusion-Volumetric Printing (EmVP), converging extrusion-bioprinting and layer-less, ultra-fast volumetric bioprinting, allowing to spatially pattern multiple inks/cell types. Light-responsive microgels were developed for the first time as bioresins (μResins) for light-based volumetric bioprinting, providing a microporous environment permissive for cell homing and self-organization. Tuning the mechanical and optical properties of gelatin-based microparticles enables their use as support bath for suspended extrusion printing, in which features containing high cell densities can be easily introduced. μResins can be sculpted within seconds with tomographic light projections into centimetre-scale, granular hydrogel-based, convoluted constructs. Interstitial microvoids enhanced differentiation of multiple stem/progenitor cells (vascular, mesenchymal, neural), otherwise not possible with conventional bulk hydrogels. As proof-of-concept, EmVP was applied to create complex synthetic biology-inspired intercellular communication models, where adipocyte differentiation is regulated by optogenetic-engineered pancreatic cells. Overall, EmVP offers new avenues for producing regenerative grafts with biological functionality, and for developing engineered living systems and (metabolic) disease models
Instytucjonalne uwarunkowania przestępczości w Polsce
No full textThe article articulates the need for empirical studies of crime using economic research methods. The author aims to encourage Polish economists to look at crime as a potential research topic, in line with a global trend. The article focuses on the key aspects of the economic theory of crime. Under this theory, the institutional determinants of crime, including the law enforcement system, play not only an essentially passive, accommodative function but also an active, preventive function. The latter function is directly linked with the so-called deterrence theory, which highlights issues related to the functioning of the law enforcement system because each component of this system generates a different aspect of the overall deterrence effect. The article discusses the reasons why crime should be the subject of economic research. These include the economic theory of crime and the deterrence theory as well as the social costs of crime and the functioning of the law enforcement system. The author also takes a position on the possibility of conducting empirical research using crime data. Referring to the existing data, he analyzes selected aspects of the functioning of the Polish law enforcement system, with a special emphasis on the prison system. The findings of the article could be useful for all those interested in the practical aspects of measuring and modeling crime by using economic analysis, the author says
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