40 research outputs found
Nutritional status alters the lipidome of a bethylid wasp incapable of de novo lipogenesis
No full textK to L shell vacancy transfer probabilities and Auger electron emission ratios for elements in the atomic range 30 ≤ Z ≤ 58
No full textThe K to L shell vacancy transfer probabilities for some elements in the atomic range 30 ≤ Z ≤ 58 were determined using the semi-empirical values of K shell fluorescence yield and the experimental values of Kβ/Kα X-ray intensity ratio. Furthermore, the KLX/KLL and KXY/KLL Auger electrons emission ratios for the same elements were obtained using the experimental values of Kβ/Kα X-ray intensity ratio. The experiments were performed using a 241Am annular radioisotope source and a high-resolution Si(Li) semiconductor detector. The experimental values of K to L shell vacancy transfer probabilities, and KLX/KLL and KXY/KLL Auger electrons emission ratios were compared with the fitted, theoretical, semi-empirical, and other available experimental values. To the best knowledge of the author, the KLX/KLL and KXY/KLL Auger electrons emission ratios of ruthenium, palladium, and tellurium have been obtained for the first time in the present work
Induced energy polarization of the vacuum and the rotational curve for the galaxy
No full textThis is a manuscript version of an article published as: Penner, A.R. (2013). "Induced energy polarization of the vacuum and the rotational curve for the Galaxy". Canadian Journal of Physics, 91(2), 126-133. DOI: 10.1139/cjp-2012-0300
Canadian Journal of Physics is available online at: http://www.nrcresearchpress.com/journal/cjp and this article is available at: http://dx.doi.org/10.1139/cjp-2012-0300The theory of an induced energy polarized vacuum, as previously presented by the author (Penner. Can. J. Phys. 90, 315 (2012)), is used to generate a theoretical rotational curve for the Galaxy. The theoretical curve generated is found to be in good agreement with Sofue's (Publ. Astron. Soc. Jpn. 64, (2012)) compilation of observations. For the baryonic mass distribution and baryonic Tully–Fisher relationship that is used, the theoretical orbital velocity at the Sun's location is found to be (235 ± 15) km s−1. The galactic rotational velocity is then found to slowly fall from this value as it asymptotically approaches the value of (192 ± 15) km s−1.https://viuspace.viu.ca/bitstream/handle/10613/2896/Penner.CJP91.2.pdf?sequence=3Post-print versio
Millimeter wave free-jet spectrum of acrolein and several isotopologues
No full textThe millimeter-wave absorption spectrum of acrolein has been investigated in the 59.6–120 GHz region with a Free-Jet Absorption MilliMeter Wave spectrometer. New measured rotational transitions belonging to the s-cis conformer and its three 13C isotopologues and those of 13C and 18O isotopologues of the s-trans conformer, observed in natural abundance, are reported.The accepted manuscript in pdf format is listed with the files at the bottom of this page. The presentation of the authors' names and (or) special characters in the title of the manuscript may differ slightly between what is listed on this page and what is listed in the pdf file of the accepted manuscript; that in the pdf file of the accepted manuscript is what was submitted by the author
The physics of galactic spin
No full textSpiral galaxies are discrete spheroidal objects with highly organized, circular internal motions about a special axis. Available models do not describe these key features or that the central regions rotate like a solid body. Practically all previous models describe galaxies as a collection of orbiting test particles, utilizenumerous fitting parameters, and require either copious amounts of surrounding dark matter that have not been detected, or modifications to Newton’s law, to fit the observed dependence of equatorial velocity on radius. Our paper probes the reasonable alternative that galaxies are discrete, spinning objects. Our analytical forward models, constructed by applying the Virial theorem and Newton’s law to Maclaurin’s spinning spheroids with varying internal density, explain why galactic rotation is organized into this 3-dimensional shape. Without invoking dark matter, our spin model explains why the outermost rotational velocities are nearly constant, yet depend on galaxy size,and, with no free parameters, provides masses of 14 important galaxies consistent with their luminosities. We show that proposed modifications to Newton’s law compensate for the dynamical differences between a flattened, spinning, Newtonian spheroid, and a collection of orbits.The accepted manuscript in pdf format is listed with the files at the bottom of this page. The presentation of the authors' names and (or) special characters in the title of the manuscript may differ slightly between what is listed on this page and what is listed in the pdf file of the accepted manuscript; that in the pdf file of the accepted manuscript is what was submitted by the author
Art Addressing Consumerism in the Age of Late Capitalism
No full textThe globalized world is still in the phase of late capitalism, signified by the establishment of multinational corporations, globalized markets and work, mass consumerism, and the fluid flow of capital. The question of the criticism of art towards the capitalist system, its ideology and consumerism is therefore still current and is readdressed in this contribution. Considering this issue, the recurrent theoretical reference is American materialist aesthetician Fredric Jameson, who was among the first to define culture and art in the context of late capitalism. In the article the author revises Jameson’s critique of art addressing consumerism and demonstrates that he did not consider the relevance of the means of consumption as regards the cultural logic of late capitalism. She claims that in order to open space to examine contemporary art as being critical towards consumerism, one also needs to consider the ontological changes that have occurred to art and pay attention to performative art, while Jameson was still focused on a representational mode of art. By being performative and also setting out actions outside of spaces that were traditionally designed for art, in the space meant for consumption, art has much a better chance to act politically, which Jameson wished to see from art which addresses consumerism but did not. The author argues that if one is to seek critical or political art in late capitalism, those would be the cases of artistic interventions into the means of consumption
What is communicative success?
No full textThe author presents a classical view of communicative success and defends it against modern views that compel a requirement of knowledge or reliability. He believes that there is no well-defined pre-theoretic concept of communicative success that is present as object of conceptual analysis. Moreover, he offers a theoretical argument for taking agreement in the mental context to be more basic than agreement in linguistic meaning. Lastly, he claims that non-compositional theories would be chosen by the charity principle because one can select more freely what meaning to assign to his sentences.PAVA Fulltext tillgänglig 2009-08-01Mening, Kommunikation, Förklarin
Thomas-Wigner rotation and Thomas precession in covariant ether theories: novel approach to experimental verification of special relativity
No full textYarman, Tolga/0000-0003-3209-2264We continue the analysis of Thomas-Wigner rotation (TWR) and Thomas precession (TP) initiated in (Kholmetskii and Yarman. Can. J. Phys. 92, 1232 (2014). doi: 10.1139/cjp-2014-0015; Kholmetskii et al. Can. J. Phys. 92, 1380 (2014). doi: 10.1139/cjp-2014-0140), where a number of points of serious inconsistency have been found in the relativistic explanation of these effects. These findings motivated us to address covariant ether theories (CET), as suggested by the first author (Kholmetskii. Phys. Scr. 67, 381 (2003)) and to show that both TWR and TP find a perfect explanation in CET. We briefly reproduce the main points of CET, which are constructed on the basis of general symmetries of empty space-time, general relativity principles, and classical causality, instead of Einstein's postulates of the special theory of relativity (STR). We demonstrate that with respect to all known relativistic experiments performed to date in all areas of physics, both theories, STR and CET, yield identical results. We further show that the only effect that differentiates STR and CET is the measurement of time-dependent TWR of two inertial frames, K-1 and K-2, related by the rotation-free Lorentz transformation with a third inertial frame, K-0, in the situation, where the relative velocity between K-1 and K-2 remains fixed. We discuss the results obtained and suggest a novel experiment, which can be classified as a new crucial test of STR
Metabolomics of aging assessed in individual parasitoid wasps
No full textMetabolomics studies of low-biomass organisms, such as small insects, have previously relied on the pooling of biological samples to overcome detection limits, particularly using NMR. We show that the differentiation of metabolite profiles of individual 1 mg parasitoid wasps of different ages is possible when using a modified sample preparation and a combination of untargeted NMR and LC-MS based metabolomics. Changes were observed between newly emerged and older wasps in glycerolipids, amino acids and circulatory sugars. This advance in chemical profiling has important implications for the study of the behaviour and ecology of parasitoids and many other species of small organisms because predictions and observations are typically made at the level of the individual. Thus, the metabolomic state of low-biomass individuals can now be related to their behaviour and ecological performance. We discuss specifically the utility of age-related metabolomic profiling but our new approach can be applied to a wide range of biological research
The same deep water as you? The impact of alternative governance arrangements of water service delivery on efficiency
No full textThis work contributes to the literature on water governance by attempting to provide an answer to the question of what are the differences in efficiency of alternative governance arrangements of water utilities. We test hypotheses derived from property rights, principal–agent, and transaction costs theories using a comprehensive database of 260 water utility systems provided by the Portuguese Regulatory Authority of Water and Waste Services. Using endogenous switching regression models estimated through maximum likelihood, the study is designed in two steps. First, we investigate differences in efficiency between in-house options and externalization and find that in-house solutions as a set (direct provision and municipal companies) are more efficient than externalization options (mixed companies and concessions). Second, we test differences in efficiency within both in-house and externalization solutions, and fail to find statistically significant differences in efficiency between in-house bureaucracies and municipal companies and between mixed companies and concessions.The author(s) disclosed receipt of the following financial support for the research, authorship, and/
or publication of this article: This research is partially supported by the “Programa Operacional da
Região Norte”, NORTE2020, in the context of project NORTE-01-0145-FEDER-000037 (Smar-
tEGOV) and by the Portuguese Science and Technology Foundation (Fundacâo para a Ciência e
Tecnologia) [Grant No. PEst-OE/CJP/UI0758/2014]. Any opinions, findings, and conclusions orThe author(s) disclosed receipt of the following financial support for the research, authorship, and/ or publication of this article: This research is partially supported by the “Programa Operacional da Regia˜o Norte”, NORTE2020, in the context of project NORTE-01-0145-FEDER-000037 (SmartEGOV) and by the Portuguese Science and Technology Foundation (Fundac¸a˜o para a Cieˆncia e Tecnologia) [Grant No. PEst-OE/CJP/UI0758/2014]. Any opinions, findings, and conclusions or recommendations expressed in this paper are those of the authors and do not necessarily reflect the views of the Portuguese Science and Technology Foundation.info:eu-repo/semantics/publishedVersio
