215 research outputs found

    Beginner adaptive swimming model for psychophysical progress of children with down syndrome

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    Objective of the study was to develop and test benefits of a new beginner adaptive swimming model for children with Down syndrom

    The influence of virtual information spaces on tourism development

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    The desire to meet the requirements of the consumer necessitates the study of the influence of modern information and communication technologies on the development of the tourism industry by operators. The urgency of creating a virtual tourist information system, and developing its structure is required in order to match the innovative processes that involve modern technologies of Virtual and Augmented Realit

    Eidetics of Law-Making Acts: Parts, Wholes and Degrees of Existence

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    In my paper I introduce the phenomenological concept of “eidetics” and its application to law. I show that, according to this approach grounded in the works of Reinach (1913/1989) and Stein (1925), the problem of the existence and validity of the law can be fruitfully analysed in terms of parts-wholes which constitute law-making acts as wholes, both as performed and fulfilled acts. I argue that the parts of law-making acts can be subject to varying degrees of constraint – necessary, possible or contingent parts – and that it is the possible part of law-making acts that makes the difference between the existence of law-making acts and their validity: between their mere existence as performed acts, and their full existence as fulfilled and valid acts. I show this in focusing on Stein’s suggestion of filling the inter-personal gap between legislator and citizens in legal provisions by introducing “integrative acts”, which facilitate the uptake and, consequently, the enforcement of legal provisions by citizens. I suggest that Stein’s work on the integrative acts of legal provisions is grounded in the eidetic claim that essential parts of a whole also include possible – and not only necessary – parts, and that these are essential relations of tendency: legal provisions tend essentially to be fulfilled and their existence acquires a full sense only when they are enforced. Finally, I deal with eidetics and the issue of degrees and quality of existence in social ontology

    Study of value orientations among russian students

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    The study substantiates the need for value orientations study among Russian college students due to the changes in economic and political foundations of Russian society. Theoretical approaches to the classification of values are considered. We considered the researchers approach to the determination of values based on the modification of the classification proposed by M. Rokeac

    Plane torsion waves in quadratic gravitational theories

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    The definition of the Riemann-Cartan space of the plane wave type is given. The condition under which the torsion plane waves exist is found. It is expressed in the form of the restriction imposed on the coupling constants of the 10-parametric quadratic gravitational Lagrangian. In the mathematical appendix the formula for commutator of the variation operator and Hodge operator is proved. This formula is applied for the variational procedure when the gravitational field equations are obtained in terms of the exterior differential forms.Comment: 3 May 1998. - 11

    The effect of cutting conditions on power inputs when machining

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    Any technological process involving modification of material properties or product form necessitates consumption of a certain power amount. When developing new technologies one should take into account the benefits of their implementation vs. arising power inputs. It is revealed that procedures of edge cutting machining are the most energy-efficient amongst the present day forming procedures such as physical and technical methods including electrochemical, electroerosion, ultrasound, and laser processing, rapid prototyping technologies etc, such as physical and technical methods including electrochemical, electroerosion, ultrasound, and laser processing, rapid prototyping technologies etc. An expanded formula for calculation of power inputs is deduced, which takes into consideration the mode of cutting together with the tip radius, the form of the replaceable multifaceted insert and its wear. Having taken as an example cutting of graphite iron by the assembled cutting tools with replaceable multifaceted inserts the authors point at better power efficiency of high feeding cutting in comparison with high-speed cutting

    New national and regional bryophyte records, 52

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    Marchantia paleacea is a new species for the Umbria Region and is rare in central and southern Italy. This record is in a Site of Community Importance (SCI) IT5220017 and a Special Area of Conservation (SAC) of the Natura 2000 EU-wide network due to the presence of the 7220* ‘Petrifying springs with tufa formation (Cratoneurion)’ Annexe I priority habitat. The particular environment, with a gorge and waterfall, created a very special microclimate that allowed the establishment of interesting liverworts and mosses

    The Nrf1 CNC-bZIP Protein Is Regulated by the Proteasome and Activated by Hypoxia

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    BACKGROUND: Nrf1 (nuclear factor-erythroid 2 p45 subunit-related factor 1) is a transcription factor mediating cellular responses to xenobiotic and pro-oxidant stress. Nrf1 regulates the transcription of many stress-related genes through the electrophile response elements (EpREs) located in their promoter regions. Despite its potential importance in human health, the mechanisms controlling Nrf1 have not been addressed fully. PRINCIPAL FINDINGS: We found that proteasomal inhibitors MG-132 and clasto-lactacystin-β-lactone stabilized the protein expression of full-length Nrf1 in both COS7 and WFF2002 cells. Concomitantly, proteasomal inhibition decreased the expression of a smaller, N-terminal Nrf1 fragment, with an approximate molecular weight of 23 kDa. The EpRE-luciferase reporter assays revealed that proteasomal inhibition markedly inhibited the Nrf1 transactivational activity. These results support earlier hypotheses that the 26 S proteasome processes Nrf1 into its active form by removing its inhibitory N-terminal domain anchoring Nrf1 to the endoplasmic reticulum. Immunoprecipitation demonstrated that Nrf1 is ubiquitinated and that proteasomal inhibition increased the degree of Nrf1 ubiquitination. Furthermore, Nrf1 protein had a half-life of approximately 5 hours in COS7 cells. In contrast, hypoxia (1% O(2)) significantly increased the luciferase reporter activity of exogenous Nrf1 protein, while decreasing the protein expression of p65, a shorter form of Nrf1, known to act as a repressor of EpRE-controlled gene expression. Finally, the protein phosphatase inhibitor okadaic acid activated Nrf1 reporter activity, while the latter was repressed by the PKC inhibitor staurosporine. CONCLUSIONS: Collectively, our data suggests that Nrf1 is controlled by several post-translational mechanisms, including ubiquitination, proteolytic processing and proteasomal-mediated degradation as well as by its phosphorylation status
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