The Role of Reason in Citizenship Education

( Uwe Meixner ) 경북대학교 중등교육연구소 2019 Asia Pacific Journal of Educational Research Vol.2 No.1

The paper defines what reason is and specifies five criteria for the good or bad use of it. Employing these criteria, the paper analyzes a recent example of a bad use (coming from an internationally well-known politician). The paper emphasizes the central role of reason for citizenship education in democratic societies, and envisages the idea of reason-education: an education in the good employment of reason (inspired by Socrates). It points out that the respect for objective truth is the foundation for this education.

WEIGHTED USABLE VOLUME - HABITAT MODELING THE REAL WORLD CALCULATION OF LIVEABLE SPACE

MADER HELMUT,MEIXNER HARALD,TUCEK PAVEL 한국수자원학회 2005 한국수자원학회 학술대회 Vol.2005 No.1

DUST AND CHEMICAL ABUNDANCES OF THE SAGITTARIUS DWARF GALAXY PLANETARY NEBULA Hen2-436

Otsuka, Masaaki,Meixner, Margaret,Riebel, David,Hyung, Siek,Tajitsu, Akito,Izumiura, Hideyuki IOP Publishing 2011 The Astrophysical journal Vol.729 No.1

<P>We have estimated elemental abundances of the planetary nebula (PN) Hen2-436 in the Sagittarius (Sgr) spheroidal dwarf galaxy using ESO/VLT FORS2, Magellan/MMIRS, and Spitzer/IRS spectra. We have detected candidates of fluorine [F II] lambda 4790, krypton [Kr III] lambda 6826, and phosphorus [P II] lambda 7875 lines and successfully estimated the abundances of these elements ([F/H] = +1.23, [Kr/H] = +0.26, [P/H] = +0.26) for the first time. These elements are known to be synthesized by the neutron capture process in the He-rich intershell during the thermally pulsing asymptotic giant branch (AGB) phase. We present a relation between C, F, P, and Kr abundances among PNe and C-rich stars. The detections of these elements in Hen2-436 support the idea that F, P, Kr together with C are synthesized in the same layer and brought to the surface by the third dredge-up. We have detected N II and O II optical recombination lines (ORLs) and derived the N2+ and O2+ abundances. The discrepancy between the abundance derived from the oxygen ORL and that derived from the collisionally excited line is > 1 dex. To investigate the status of the central star of the PN, nebula condition, and dust properties, we construct a theoretical spectral energy distribution (SED) model to match the observed SED with Cloudy. By comparing the derived luminosity and temperature of the central star with theoretical evolutionary tracks, we conclude that the initial mass of the progenitor is likely to be similar to 1.5-2.0M(circle dot) and the age is similar to 3000 yr after the AGB phase. The observed elemental abundances of Hen2-436 can be explained by a theoretical nucleosynthesis model with a star of initial mass 2.25 M-circle dot, Z = 0.008, and LMC compositions. We have estimated the dust mass to be 2.9x10(-4) M-circle dot (amorphous carbon only) or 4.0x10(-4) M-circle dot (amorphous carbon and polycyclic aromatic hydrocarbon). Based on the assumption that most of the observed dust is formed during the last two thermal pulses and the dust-to-gas mass ratio is 5.58 x 10(-3), the dust mass-loss rate and the total mass-loss rate are < 3.1x10(-8) M-circle dot yr(-1) and < 5.5x10(-6) M-circle dot yr(-1), respectively. Our estimated dust mass-loss rate is comparable to a Sgr dwarf galaxy AGB star with similar metallicity and luminosity.</P>

What Sets the Massive Star Formation Rates and Efficiencies of Giant Molecular Clouds?

Ochsendorf, Bram B.,Meixner, Margaret,Roman-Duval, Julia,Rahman, Mubdi,Evans II, Neal J. American Astronomical Society 2017 The Astrophysical journal Vol.841 No.2

<P>Galactic star formation scaling relations show increased scatter from kpc to sub-kpc scales. Investigating this scatter may hold important clues to how the star formation process evolves in time and space. Here, we combine different molecular gas tracers, different star formation indicators probing distinct populations of massive stars, and knowledge of. the evolutionary state of each star-forming region to derive the. star formation properties of similar to 150 star-forming complexes over the face of the Large Magellanic Cloud (LMC). We find that the rate of massive star formation ramps up when stellar clusters emerge and boost the formation of subsequent generations of massive stars. In addition, we reveal that the star formation efficiency of individual giant molecular clouds (GMCs) declines with increasing cloud gas mass (M-cloud). This trend persists in Galactic star-forming regions. and implies higher molecular gas depletion times for larger GMCs. We compare the star formation efficiency per freefall time (epsilon(ff)) with predictions from various widely used analytical star formation models. While these models can produce large dispersions in epsilon(ff) similar to those in. observations, the origin of the model-predicted scatter is inconsistent with observations. Moreover, all models fail to reproduce the observed decline of epsilon(ff) with increasing M-cloud in the LMC and the Milky Way. We conclude that analytical star formation models idealizing global turbulence levels and. cloud densities. and assuming a stationary star formation rate (SFR) are inconsistent with observations from modern data sets tracing massive star formation on individual cloud scales. Instead, we reiterate the importance of local stellar feedback in shaping the properties of GMCs and setting their massive SFR.</P>

Lightweight urban computation interchange (LUCI): a system to couple heterogeneous simulations and views

Lukas Treyer,Bernhard Klein,Reinhard Konig,Christine Meixner 대한공간정보학회 2016 Spatial Information Research Vol.24 No.3

In this paper we introduce LUCI, a lightweight urban computation interchange system, designed to bring the advantages of calculation and content co-ordination system to small planning and design groups by the means of an open source middle-ware. The middle-ware focuses on problems typical to urban planning and therefore features a geo-data repository as well as a job runtime administration, to coordinate simulation models and its multiple views. The described system architecture is accompanied by two exemplary use cases, that have been implemented to test and further develop our concepts and implementations.

Post-Acute Traumatic Brain Injury Rehabilitation Treatment Variables: A Mixed Methods Study

Victoria Harding,Cynthia O’Donoghue,Cara Meixner,Frank Lewis,Gordon Horn,Robert Russell 한국언어재활사협회 2017 Clinical Archives of Communication Disorders Vol.2 No.3

Purpose: This study explores gains in function, measured by the Mayo-Portland Adaptability Inventory-4 (MPAI-4) and qualitative interviews, of individuals who participated in a Post Hospital Interdisciplinary Brain Injury Rehabilitation – Residential (PHIDBIR-R) program as part of their recovery from brain injury. Methods: The study uses a mixed methods design to identify correlates and explore pathways to functional recovery. Change scores from the MPAI-4 were derived to identify participants with greatest functional improvement. Qualitative interviews were employed to understand PHIDBIR-R program constructs associated with functional improvement. MPAI-4 data were derived from a bank of 135 PHIDBIR-R programs in 22 states. Participants were adults who sustained a brain injury and participated in a PHIDBIR-R program. 57 participants were identified as highest scorers; 10 completed semi-structured interviews. Results: Data were analyzed using constant comparison procedures and rigorous credibility techniques. Thirteen themes within four categories (support, therapies, continuum of care, environment of care) emerged, reflecting participants’ understanding of constructs contributing to positive outcomes. Conclusions: The results provided a cogent framework for program development, stakeholder program selection, and advocate and legislator considerations.

Consumption and Production of NO from European Forest Soils

D.-S. Kim,S.M. van Dijk,F.X. Meixner 한국대기환경학회 2008 한국대기환경학회지 Vol.24 No.E1

Relationship between the optimum soil water content and clay content on soil samples from mid-latitude European forest was tested. Soil samples from 4 different experimental sites (two forest sites in the Netherlands and a Danish forest) were collected, and analyzed for the soil physical and chemical characteristics. Water retention curves for the soil samples were determined according to the standard procedure ISO 11274, and pF decreased with increase in soil water contents. NO is simultaneously produced and consumed by microbiological processes, which comprise of nitrification and denitrification. NO consumption and production rates were determined from the soil samples and compared to their corresponding water retention curves in order to find the optimum soil water content and matric potential for maximum NO release from mid-latitude soils. NO consumption rate coefficient (k) in Hollandse Hout was significantly lower than those in other soil sites. Maximum NO production was observed at an intermediate soil moisture (0.2~0.3 ㎏/㎏) in all the soil samples. Resulting from the NO consumption and production rates for the soils, the empirical NO fluxes of the different soils were calculated in the laboratory.

Designing high performance all-small-molecule solar cells with non-fullerene acceptors: comprehensive studies on photoexcitation dynamics and charge separation kinetics

Shi, Junqing,Isakova, Anna,Abudulimu, Abasi,van den Berg, Marius,Kwon, Oh Kyu,Meixner, Alfred J.,Park, Soo Young,Zhang, Dai,Gierschner, Johannes,Lü,er, Larry The Royal Society of Chemistry 2018 ENERGY AND ENVIRONMENTAL SCIENCE Vol.11 No.1

<P>Solution-processable all-small-molecule organic solar cells (OSCs) have shown dramatic progress in improving stability and photovoltaic efficiency. However, knowledge of photoexcitation dynamics in this novel class of materials is very limited. To fully exploit the design capacities inherent in small molecule chemistry, the elementary processes and branching yields must be known in detail. Here, we present a combined computational-experimental study of photoexcitation dynamics of a prototypical all-small-molecule photovoltaic blend, p-DTS(FBTTh2)2 as a donor and NIDCS-MO as an acceptor. Femtosecond spectroscopy data show that excitonic coupling is small and that the charge transfer states are localized, at first glance contradicting the high internal quantum efficiency (IQE) and open circuit voltage (<I>V</I>OC) of this material. A target analysis of the femtosecond spectra yields exciton dissociation rates of 1/(25 ps) and 1/(100 ps) for the as-deposited and annealed blend, respectively. These rates are far slower than in typical polymer based organic solar cells. Still, internal quantum yields are high because parasitic quenching processes are found to be even slower. In the framework of semiclassical Marcus theory, we demonstrate that our system shows near-optimum energy conversion and charge separation yields, due to negligible activation energy for charge generation but high activation energy for charge recombination, allowing enough time to separate localized charge transfer states. We thus justify both the high internal quantum yields and the high open circuit voltage found in this system. Finally, we predict that highly efficient and stable low-optical bandgap systems can be realized by reducing the electronic coupling between the donor and acceptor.</P>

Physical properties of giant molecular clouds in the Large Magellanic Cloud

Hughes, A.,Wong, T.,Ott, J.,Muller, E.,Pineda, J. L.,Mizuno, Y.,Bernard, J.-P.,Paradis, D.,Maddison, S.,Reach, W. T.,Staveley-Smith, L.,Kawamura, A.,Meixner, M.,Kim, S.,Onishi, T.,Mizuno, N.,Fukui, Y. Blackwell Publishing Ltd 2010 Monthly notices of the Royal Astronomical Society Vol.406 No.3

<P>ABSTRACT</P><P>The Magellanic Mopra Assessment (MAGMA) is a high angular resolution <SUP>12</SUP>CO (<I>J</I>= 1 → 0) mapping survey of giant molecular clouds (GMCs) in the Large Magellanic Cloud (LMC) and Small Magellanic Cloud using the Mopra Telescope. Here we report on the basic physical properties of 125 GMCs in the LMC that have been surveyed to date. The observed clouds exhibit scaling relations that are similar to those determined for Galactic GMCs, although LMC clouds have narrower linewidths and lower CO luminosities than Galactic clouds of a similar size. The average mass surface density of the LMC clouds is 50 M<SUB>⊙</SUB> pc<SUP>−2</SUP>, approximately half that of GMCs in the inner Milky Way. We compare the properties of GMCs with and without signs of massive star formation, finding that non-star-forming GMCs have lower peak CO brightness than star-forming GMCs. We compare the properties of GMCs with estimates for local interstellar conditions: specifically, we investigate the H <SMALL>I</SMALL> column density, radiation field, stellar mass surface density and the external pressure. Very few cloud properties demonstrate a clear dependence on the environment; the exceptions are significant positive correlations between (i) the H <SMALL>I</SMALL> column density and the GMC velocity dispersion, (ii) the stellar mass surface density and the average peak CO brightness and (iii) the stellar mass surface density and the CO surface brightness. The molecular mass surface density of GMCs without signs of massive star formation shows no dependence on the local radiation field, which is inconsistent with the photoionization-regulated star formation theory proposed by McKee. We find some evidence that the mass surface density of the MAGMA clouds increases with the interstellar pressure, as proposed by Elmegreen, but the detailed predictions of this model are not fulfilled once estimates for the local radiation field, metallicity and GMC envelope mass are taken into account.</P>