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Search Results: 1 - 10 of 31166 matches for " Thomas Ostrowski "
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Music Education, Aesthetics, and the Measure of Academic Achievement  [PDF]
Karl Madden, David Orenstein, David Orenstein, Alexei Oulanov, Yelena Novitskaya, Ida Bazan, Thomas Ostrowski, Min Hyung Ahn
Creative Education (CE) , 2014, DOI: 10.4236/ce.2014.519194
Abstract: Grades and test scores are the traditional measurement of academic achievement. Quantitative improvements on standardized scores in Math/Science/Language are highly-coveted outcomes for meeting accreditation standards required for institutional program funding. Music and the Fine Arts, difficult to assess by traditional academic achievement measurement, and often devalued as so-called “luxury” subjects, struggle for necessary funding. Showing measureable collateral value to other academic subjects—such as math—in order to justify music program funding is dubious. To objectify the purpose of music education in terms of its influence on other subjects is to overlook aesthetic value. The scholarly literature recognizes an historical tendency to correlate music activities and aptitude to other subjects (and to intelligence in general), but quantitative cause-effect claims are not supported scientifically. Music participation from childhood helps build productive, well-socialized, excellent people, but to quantitatively trace the cause to music itself remains unproven. To recognize the benefits of music and the arts by aesthetic merit involves practical, holistic views of education not based on quantifiable test scoring.
Virialisation-induced curvature as a physical explanation for dark energy
Boudewijn F. Roukema,Jan J. Ostrowski,Thomas Buchert
Physics , 2013, DOI: 10.1088/1475-7516/2013/10/043
Abstract: The geometry of the dark energy and cold dark matter dominated cosmological model (LambdaCDM) is commonly assumed to be given by a Friedmann-Lemaitre-Robertson-Walker (FLRW) metric, i.e. it assumes homogeneity in the comoving spatial section. The homogeneity assumption fails most strongly at (i) small distance scales and (ii) recent epochs, implying that the FLRW approximation is most likely to fail at these scales. We use the virialisation fraction to quantify (i) and (ii), which approximately coincide with each other on the observational past light cone. For increasing time, the virialisation fraction increases above 10% at about the same redshift (sim 1-3) at which Omega_Lambda grows above 10% (approx 1.8). Thus, instead of non-zero Omega_Lambda, we propose an approximate, general-relativistic correction to the matter-dominated (Omega_m =1, Omega_Lambda=0), homogeneous metric (Einstein de Sitter, EdS). A low-redshift effective matter-density parameter of Omega_m^eff(0) = 0.26 pm 0.05 is inferred. Over redshifts 0 < z < 3, the distance modulus of the virialisation-corrected EdS model approximately matches the LambdaCDM distance modulus. This rough approximation assumes "old physics" (general relativity), not "new physics". Thus, pending more detailed calculations, we strengthen the claim that "dark energy" should be considered as an artefact of emerging average curvature in the void-dominated Universe, via a novel approach that quantifies the relation between virialisation and average curvature evolution.
Virialization-induced curvature versus dark energy
Jan J. Ostrowski,Boudewijn F. Roukema,Thomas Buchert
Physics , 2013,
Abstract: The concordance model is successful in explaining numerous observable phenomena at the price of introducing an exotic source of unknown origin: dark energy. Dark energy dominance occurs at recent epochs, when we expect most cosmological structures to have already formed, and thus, when the error induced by forcing the homogeneous FLRW metric onto the data is expected to be the most significant. We propose a way to quantify the impact of deviations from homogeneity on the evolution of cosmological parameters. Using a multi-scale partitioning approach and the virialization fraction estimated from numerical simulations in an Einstein-de Sitter model, we obtain an observationally realistic distance modulus over redshifts 0 < z < 3 by a relativistic correction of the FLRW metric.
Synthesis of N-7-Substituted Purines from Imidazole Precursors
Stanislaw Ostrowski
Molecules , 1999, DOI: 10.3390/41000287
Abstract: Synthesis of purines and purine mono-1-oxides from the respective 5-substituted 4-nitroimidazole derivatives is described. The commercially available 4-nitroimidazole, in a few simple steps (including Vicarious Nucleophilic Substitution of Hydrogen), was transformed into: 4-aminoimidazoyl-5-carboximes, N-[1-(4-amino-1H-imidazol-5-yl)methylidene]-N-(aryl)amine derivatives or into 4-amino-5-aminomethyl-imidazole. These intermediates were cyclized to the final products.
Texting Tolerance: Computer-Mediated Interfaith Dialogue
Ally Ostrowski
Webology , 2006,
Abstract: As religious unrest and tension rise throughout the world, facilitating interfaith dialogue has become more important than ever. Many religious organizations have begun to include interfaith discourse into their general religious programming for members and some hold regular dialogue groups for their local population. But face to face events tend to focus only on the local community, excluding distant others who also seek to participate in interreligious discourse. The Internet, therefore, is an important medium to utilize for interfaith dialogue, and can bring isolated people together to discuss issues of difference and faith. This project finds that online interfaith information is excellent for congregations to utilize because of the relatively anonymous nature of the Internet, the disappearance of proximity limitation, the ability to become close with other participants, access to a spectrum of people who practice a particular religion, and the extra time available to ponder moderator questions and previous discussions. Using the Internet for interfaith dialogue is an important step for religious institutions and congregations. Not only are they reaching to their own members through cyberspace, but also reaching the larger population, sharing their range of religious beliefs, and participating in a global effort to improve tolerance and understanding between religious practitioners.
A quasi phase-resolving model of net sand transport and short-term cross-shore profile evolution
Rafa? Ostrowski
Oceanologia , 2003,
Abstract: A way of modelling of the net sediment transport rate on a cross-shore profile and the resulting sea bed changes is presented. In the sediment transport computations, a three-layer model with a description of the bedload based on the water-soil mixture theory by Kaczmarek & Ostrowski (1998, 2002) is used. The modelling system is applied to wave-current conditions variable over the cross-shore profile, and determined using the computational framework of Szmytkiewicz (2002a, b). The sediment transport module incorporates the asymmetricwave approaches as proposed by Ostrowski (2002). Model simulations have been produced for uniformly sloped and multi-bar initialcross-shore profiles. Some of the model results are compared with the IBW PAN (Institute of Hydroengineering of the PolishAcademy of Sciences) field data collected at the Coastal Research Station in Lubiatowo.
Old Lithuanian interrogative particle biau
Norbert Ostrowski
Baltistica , 2012,
Cosmic Ray Acceleration at Relativistic Shock Waves
M. Ostrowski
Physics , 1996,
Abstract: Theory of the first-order Fermi acceleration of cosmic ray particles at relativistic shock waves is reviewed. We consider shocks with parallel and oblique, sub- and super-luminal magnetic field configurations and with finite-amplitude magnetic field perturbations. A role of oblique field configurations and field perturbations in forming the cosmic ray energy spectrum and changing the acceleration time scale is discussed.
Acceleration of UHE Cosmic Ray Particles at Relativistic Jets in Extragalactic Radio Sources
M. Ostrowski
Physics , 1996,
Abstract: A mechanism of ultra-high energy (UHE) cosmic ray acceleration in extragalactic radio sources at the interface between the relativistic jet and the ambient medium is discussed as a supplement to the shock acceleration in `hot spots'. Particles accelerated at the jet side boundary are expected to dominate at highest energies. The spectrum formation near the cut-off energy is modeled using the Monte Carlo particle simulations.
Cosmic Ray Acceleration at Relativistic Plasma Flows
M. Ostrowski
Physics , 1998,
Abstract: Theoretical concepts ofn cosmic ray particle acceleration at relativistic plasma flows -- shocks and shear layers -- are reviewed. We begin with a discussion of mildly relativistic shock waves. The role of oblique field configurations and field perturbations in forming the particle energy spectrum and changing the acceleration time scale is considered. Then, we report on two interesting attempts to consider particle acceleration at ultra-relativistic shocks. Finally, in contrast to the compressive shock discontinuities, we discuss the acceleration processes acting in the boundary layer at the tangential velocity transition. The second-order Fermi acceleration as well as the cosmic ray `viscous' acceleration provide the mechanisms generating energetic particles there.
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