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Search Results: 1 - 10 of 10587 matches for " Andreas Pawlas "
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Modern Economization—Only a Burden on Diaconia and Church?  [PDF]
Andreas Pawlas
Modern Economy (ME) , 2014, DOI: 10.4236/me.2014.55061

Although Diaconia/Caritas and Protestant/Roman Katholic Churches are large service providers in Germany, they often feel economic thinking as a burden or even a nuisance. It is regarded as something “not authentic” in the aid and assistance to the poor, miserable and needy as successors in the love of Jesus Christ. But economic thinking has to be seen as careful handling of the entrusted goods and is justified in the sense of belief in creation and the “Two Natures Doctrine” of Christ. It must be regarded as an important expression of all the earthly. On the other hand an exclusively economic profit-oriented attitude easily can turn in greed and avarice. And that makes it blind not only for the responsibility to one’s neighbor and but also for essential risks. Therefore many companies went to develop their own “corporate culture”, in which should be deployed the ethical principles of the companies. However in the companies of the Diaconia it is not necessary to develop new ethical principals because diaconal work should be founded in a “culture of charity” of Christianity that creates engaged employees.

Zbynek Pawlas
Image Analysis and Stereology , 2012, DOI: 10.5566/ias.v31.p99-108
Abstract: Local stereology uses information obtained from central sections passing through a reference point of the particle.The aim of this paper is to investigate the prediction of extremes of shape and size parameters based on the central sections. We consider the particle population formed by spheroids (either prolate or oblate) and assume that the reference point is the centre of the spheroid. A relation between shape and size parameters of the particles and their planar sections is derived and consequently stability properties of the domain of attractions are proved.
Fractional absolute moments of heavy tailed distributions
Muneya Matsui,Zbynek Pawlas
Statistics , 2013,
Abstract: Several convenient methods for calculation of fractional absolute moments are given with application to heavy tailed distributions. We use techniques of fractional differentiation to obtain formulae for $E[|X-\mu|^\gamma]$ with $1<\gamma<2$ and $\mu\in\mathbb{R}$. The main focus is on heavy tailed distributions, several examples are given with analytical expressions of fractional absolute moments. As applications, we calculate the fractional moment errors for both prediction and parameter estimation problems.
Effect of Common Buffers and Heterocyclic Ligands on the Binding of Cu(II) at the Multimetal Binding Site in Human Serum Albumin
Magdalena Soko?owska,Krystyna Pawlas,Wojciech Bal
Bioinorganic Chemistry and Applications , 2010, DOI: 10.1155/2010/725153
Abstract: Visible-range circular dichroism titrations were used to study Cu(II) binding properties of Multimetal Binding Site (MBS) of Human Serum Albumin (HSA). The formation of ternary MBS-Cu(II)-Buffer complexes at pH 7.4 was positively verified for sodium phosphate, Tris, and Hepes, the three most common biochemical buffers. The phosphate > Hepes > Tris order of affinities, together with strong spectral changes induced specifically by Tris, indicates the presence of both Buffer-Cu(II) and Buffer-HSA interactions. All complexes are strong enough to yield a nearly 100% ternary complex formation in 0.5?mM HSA dissolved in 100?mM solutions of respective buffers. The effects of warfarin and ibuprofen, specific ligands of hydrophobic pockets I and II in HSA on the Cu(II) binding to MBS were also investigated. The effects of ibuprofen were negligible, but warfarin diminished the MBS affinity for Cu(II) by a factor of 20, as a result of indirect conformational effects. These results indicate that metal binding properties of MBS can be modulated directly and indirectly by small molecules. 1. Introduction Human serum albumin (HSA) is the most abundant protein of blood serum, at a concentration of ca. 0.6?mM ( 4%). It is a versatile carrier protein, involved in the transport of hormones, vitamins, fatty acids, xenobiotics, drugs and metabolites [1]. HSA also carries metal ions, including physiological Ca2+, Zn2+, Co2+, and Cu2+, as well as toxic Cd2+ and Ni2+ [1–3]. Four distinct metal binding sites have been characterized so far in HSA. Cys-34, the only free thiol in HSA, is located at the bottom of a hydrophobic pocket. It selectively binds hydrophobic complexes of heavy metal ions, such as Pt2+ and Au+ [4–7]. Three other sites are more accessible and more versatile. The N-terminal binding site (NTS, also called the ATCUN motif) has been characterized particularly well. It is composed of the first three amino acid residues of the HSA sequence, Asp-Ala-His. This sequence is not confined sterically, as evidenced by the absence of trace of these residues in X-ray structures of HSA [1, 2] and has a conformational freedom to wrap around a metal ion. The resulting square-planar complex exhibits a rare coordination mode with deprotonated amide nitrogens of Ala and His residues, in addition to the N-terminal amine and the His-3 imidazole donor [8–10]. It provides the primary binding site for Cu(II) and Ni(II) ions and the tertiary site for Co(II) ions [10, 11]. We recently demonstrated that the conditional dissociation constant for Cu(II) binding at the NTS is as low as 1?pM
Contextualizing an EFL teacher's beliefs about grammar teaching
Gloria Gil,Marcia Regina Pawlas Carazzai
Revista Brasileira de Linguística Aplicada , 2007,
Abstract: This article reports on a qualitative study that focused on an EFL teacher's beliefs and her practices concerning grammar teaching. The study aimed at investigating how the teacher's beliefs could be contextualized with classroom data. In the first stage of data collection and analysis, an open questionnaire was given to the teacher. Then, as a means of contextualizing the beliefs found in the analysis of the questionnaire data, the second stage of data collection and analysis focused on episodes from the teacher's classes. The analysis of the data shows that, according to this teacher, grammar teaching should be used as a facilitative device in order to help students in their learning process. The results of this study also indicate that the teacher's beliefs are influenced by three interactive sources: cognitive, contextual and experiential. Este artigo reporta um estudo qualitativo que enfocou as cren as e práticas de uma professora de inglês-LE relacionadas ao ensino da gramática. O estudo objetivou investigar como as cren as da professora poderiam ser contextualizadas com dados da sala de aula. No primeiro estágio de análise e coleta de dados, um questionário foi aplicado à professora. Posteriormente, para contextualizar as cren as encontradas na análise do questionário, o segundo estágio de análise e coleta de dados enfocou episódios das aulas da professora. A análise dos dados mostrou que, de acordo com essa professora, o ensino da gramática deveria ser usado como um recurso facilitador para ajudar os alunos em seus processos de aprendizagem. Os resultados também indicaram que as cren as da professora s o influenciadas por três fatores interativos: cognitivo, contextual e experiencial.
Zbyněk Pawlas,Eva B Vedel Jensen
Image Analysis and Stereology , 2006, DOI: 10.5566/ias.v25.p155-163
Abstract: In the present paper the statistical properties of local stereological estimators of particle volume are studied. It is shown that the variance of the estimators can be decomposed into the variance due to the local stereological estimation procedure and the variance due to the variability in the particle population. It turns out that these two variance components can be estimated separately, from sectional data. We present further results on the variances that can be used to determine the variance by numerical integration for particular choices of particle shapes.
Statistics for Poisson models of overlapping spheres
Daniel Hug,Günter Last,Zbyněk Pawlas,Wolfgang Weil
Statistics , 2013,
Abstract: The paper considers the stationary Poisson Boolean model with spherical grains and proposes a family of nonparametric estimators for the radius distribution. These estimators are based on observed distances and radii, weighted in an appropriate way. They are ratio-unbiased and asymptotically consistent for growing observation window. It is shown that the asymptotic variance exists and is given by a fairly explicit integral expression. Asymptotic normality is established under a suitable integrability assumption on the weight function. The paper also provides a short discussion of related estimators as well as a simulation study.
Economic Growth and a Low Carbon Economy―Does the Earth Suffer from an “Easter Island Syndrome”?  [PDF]
Andreas Oberheitmann
Low Carbon Economy (LCE) , 2011, DOI: 10.4236/lce.2011.24024
Abstract: The history of the Eastern Islands in the Pacific with an increasing over-utilization of natural resources reminds us of the mistakes modern societies are making and the question is obvious whether the Earth is suffering from an Eastern Islands Syndrome, in other words whether the egoism inherent in humans long-term might have fatal consequences for our species homo sapiens. Climate research identified two important phenomena, which should remind us of the Easter Islands: feedbacks and tipping points, i.e. self-accelerating phenomena of global warming and reaching irreversible points of climate change. Only a quick worldwide return to a low carbon economy is able to stabilize global warming on a bearable level. Both, Annex-I countries and Non-Annex-I countries have to contribute to reaching this goal taking their historical, current and future responsibilities into account. A post Kyoto regime based on cumulative per-capita CO2-emission rights and a international emission trading could provide for incentives to achieve a low carbon economy, especially for newly industrialized countries.
Development of a Low Carbon Economy in Wuxi City  [PDF]
Andreas Oberheitmann
American Journal of Climate Change (AJCC) , 2012, DOI: 10.4236/ajcc.2012.12007
Abstract: The development of a Low Carbon Economy is a vital instrument to encounter climate change and take into account the growing challenges of an increasing urbanization in China. Wuxi City in East China’s Jiangsu Province is starting to implement a Low Carbon City Plan for safeguarding a sustainable development of the city until 2020 and beyond. This paper aims at estimating the impact of the Low Carbon City plan for Wuxi’s energy demand and CO2-emissions until 2050. Using an econometric energy supply and demand model to estimate and forecast the Wuxi energy and CO2-balance aggregates until 2050, it compares a scenario without specific Low Carbon City measures to reduce sectoral CO2-intensities to a Low Carbon scenario implementing these measures according to the Low Carbon City Plan until 2020 and beyond. The decomposition of the Kaya-identity reveals that the increase of per capita income has the largest impact on the growth of CO2-emissions and the decrease of energy intensity of Gross Value Added the largest impact on the reduction of CO2-emissions in Wuxi. A decrease of population and CO2-intensity of Primary energy supply only have average contributions. The decrease of energy intensity of Gross Value Added is due to energy efficiency gains in the single economic sectors, but to a large extent due to structural changes of the economy away from energy intensive sectors such as iron and steel, chemical industry or cement industry towards the energy extensive service sectors. A growing residential sector also reduces the industrial share of energy demand. Only following the assumed national trend with a shift from CO2-intensive industries to a CO2-extensive service economy, the Low Carbon goal of a 50% reduction of CO2-intensity of Gross Value Added compared to 2005 cannot be reached in Wuxi. Specific sectoral CO2 -intensity goals have to be successfully observed by the economic sectors in Wuxi, especially by the industry. The promotion of combined heat and power generation also has to contribute to the specific activities in Wuxi.
A Global Solution of the Einstein-Maxwell Field Equations for Rotating Charged Matter  [PDF]
Andreas Georgiou
Journal of Modern Physics (JMP) , 2012, DOI: 10.4236/jmp.2012.329168
Abstract: A stationary axially symmetric exterior electrovacuum solution of the Einstein-Maxwell field equations was obtained. An interior solution for rotating charged dust with vanishing Lorentz force was also obtained. The two spacetimes are separated by a boundary which is a surface layer with surface stress-energy tensor and surface electric 4-current. The layer is the spherical surface bounding the charged matter. It was further shown, that all the exterior physical quantities vanished at the asymptotic spatial infinity where spacetime was shown to be flat. There are two different sets of junction conditions: the electromagnetic junction conditions, which were expressed in the traditional 3-dimensional form of classical electromagnetic theory; and the considerably more complicated gravitational junction conditions. It was shown that both—the electromagnetic and gravitational junction conditions—were satisfied. The mass, charge and angular momentum were determined from the metric. Exact analytical formulae for the dipole moment and gyromagnetic ratio were also derived. The conditions, under which the latter formulae gave Blackett’s empirical result for rotating stars, were investigated.
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