Using Elicited Choice Probabilities to Estimate Random Utility Models: Preferences for Electricity Reliability

When data on actual choices are not available, researchers studying preferences sometimes pose choice scenarios and ask respondents to state the actions they would choose if they were to face these scenarios. The data on stated choices are then used to estimate random utility models, as if they are data on actual choices. Stated choices may differ from actual ones because researchers typically provide respondents with less information than they would have facing actual choice problems. Elicitation of choice probabilities overcomes this problem by permitting respondents to express uncertainty about their behavior. This paper shows how to use elicited choice probabilities to estimate random utility models with random coefficients and applies the methodology to estimate preferences for electricity reliability in Israel.

Nucleosynthesis imprints from different Type Ia Supernova explosion scenarios and implications for galactic chemical evolution

We analyze the nucleosynthesis yields of various Type Ia supernova explosion simulations including pure detonations in sub- Chandrasekhar mass white dwarfs, double detonations and pure helium detonations of sub-Chandrasekhar mass white dwarfs with an accreted helium envelope, a violent merger model of two white dwarfs and deflagrations as well as delayed detonations in Chandrasekhar mass white dwarfs. We focus on the iron peak elements Mn, Zn and Cu. To this end, we also briefly review the different burning regimes and production sites of these elements as well as the results of abundance measurements and several galactic chemical evolution studies. We find that super-solar values of [Mn/Fe] are not restricted to Chandrasekhar mass explosion models. Scenarios including a helium detonation can significantly contribute to the production of Mn, in particular the models proposed for calcium-rich transients. Although Type Ia supernovae are often not accounted for as production sites of Zn and Cu, our models involving helium shell detonations can produce these elements in super-solar ratios relative to Fe. Our results suggest a re-consideration of Type Ia supernova yields in galactic chemical evolution models. A detailed comparison with observations can provide new insight into the progenitor and explosion channels of these events.Comment: 15 paged, 8 figures, accepted for publication in A&

Solstice: An Electronic Journal of Geography and Mathematics

Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/116297/1/00CoverSolsticeXXVINo2.pdfhttp://deepblue.lib.umich.edu/bitstream/2027.42/116297/2/01AustinSolsticeXXVINo2.pdfhttp://deepblue.lib.umich.edu/bitstream/2027.42/116297/3/02ArlinghausArlinghausKerskiSolsticeXXVINo2.pdfhttp://deepblue.lib.umich.edu/bitstream/2027.42/116297/4/03FavroSolsticeXXVINo2.pdfhttp://deepblue.lib.umich.edu/bitstream/2027.42/116297/10/Ani_iphone.gifhttp://deepblue.lib.umich.edu/bitstream/2027.42/116297/11/AniIMaGe.gifhttp://deepblue.lib.umich.edu/bitstream/2027.42/116297/12/QRcover.gifDescription of 00CoverSolsticeXXVINo2.pdf : 2015: Cover, Solstice Vol. XXVI, No. 2Description of 01AustinSolsticeXXVINo2.pdf : 2015: Austin ArticleDescription of 02ArlinghausArlinghausKerskiSolsticeXXVINo2.pdf : 2015: Arlinghaus, Arlinghaus, Kerski, ArticleDescription of 03FavroSolsticeXXVINo2.pdf : 2015: Favro ArticleDescription of Ani_iphone.gif : Animation for Cover, iPhone AppDescription of AniIMaGe.gif : QR cover animationDescription of QRcover.gif : Cover animation, QR, hexagon sea

Weak radiative hyperon decays, Hara's theorem and the diquark

Weak radiative hyperon decays are discussed in the diquark-level approach. It is pointed out that in the general diquark formalism one may reproduce the experimentally suggested pattern of asymmetries, while maintaining Hara's theorem in the SU(3) limit. At present, however, no detailed quark-based model of parity-violating diquark-photon coupling exists that would have the necessary properties.Comment: 10 pages, LaTe

Comment on "Hara's theorem in the constituent quark model"

It is pointed out that current conservation alone does not suffice to prove Hara's theorem as it was claimed recently. By explicit calculation we show that the additional implicit assumption made in such "proofs" is that of a sufficiently localized current.Comment: 8 pages, Late

Solstice: An Electronic Journal of Geography and Mathematics, Volume XX, Number 2

This document was delivered over the internet. The .zip file contains all static and animated images..The purpose of Solstice is to promote interaction between geography and mathematics. Articles in which elements of one discipline are used to shed light on the other are particularly sought. Also welcome, are original contributions that are purely geographical or purely mathematical. These may be prefaced (by editor or author) with commentary suggesting directions that might lead toward the desired interaction. Contributed articles will be refereed by geographers and/or mathematicians. Invited articles will be screened by suitable members of the editorial board. IMaGe is open to having authors suggest, and furnish material for, new regular features.Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/64497/1/win09.pdfhttp://deepblue.lib.umich.edu/bitstream/2027.42/64497/3/01a_PerimeterProjectPartII.pdfhttp://deepblue.lib.umich.edu/bitstream/2027.42/64497/4/02a_Austin.pdfhttp://deepblue.lib.umich.edu/bitstream/2027.42/64497/5/03a_Monograph3.pdfhttp://deepblue.lib.umich.edu/bitstream/2027.42/64497/6/04a_Phones.pdfhttp://deepblue.lib.umich.edu/bitstream/2027.42/64497/7/05a_3Darchive.pdfhttp://deepblue.lib.umich.edu/bitstream/2027.42/64497/12/SolsticeVol20No2.ziphttps://deepblue.lib.umich.edu/bitstream/2027.42/64497/15/SolsticeVolXXNo2.pdfhttps://deepblue.lib.umich.edu/bitstream/2027.42/64497/17/SolsticeVolXXNo2.pdfhttps://deepblue.lib.umich.edu/bitstream/2027.42/64497/18/Solstice_VolXXNo2.pdfDescription of SolsticeVolXXNo2.pdf : Cover fileDescription of win09.pdf : Full journal: Solstice, Volume XX, Number 2.Description of 01a_PerimeterProjectPartII.pdf : Article: Perimeter Project, Part IIDescription of 02a_Austin.pdf : Article: Southeast Asia GazetteerDescription of 03a_Monograph3.pdf : Article: Essays on Mathematical GeographyDescription of 04a_Phones.pdf : Article: UM Emergency phonesDescription of 05a_3Darchive.pdf : ArticleDescription of SolsticeVol20No2.zip : All files including animated images.Description of SolsticeVolXXNo2.pdf : Cover of JournalDescription of Solstice_VolXXNo2.pdf : Solstice with attachments, VolXX No

GDR Feeding of the Highly-Deformed Band in 42Ca

The gamma-ray spectra from the decay of the GDR in the compound nucleus reaction 18O+28Si at bombarding energy of 105 MeV have been measured in an experiment using the EUROBALL IV and HECTOR arrays. The obtained experimental GDR strength function is highly fragmented, with a low energy (10 MeV) component, indicating a presence of a large deformation and Coriolis effects. In addition, the preferential feeding of the highly-deformed band in 42Ca by this GDR low energy component is observed.Comment: 6 pages, 2 figures, Proceedings of the Zakopane2004 Symposium, to be published in Acta Phys. Pol. B36 (2005

Nucleosynthesis imprints from different Type Ia supernova explosion scenarios and implications for galactic chemical evolution

We analyze the nucleosynthesis yields of various Type Ia supernova explosion simulations including pure detonations in sub-Chandrasekhar mass white dwarfs; double detonations and pure helium detonations of sub-Chandrasekhar mass white dwarfs with an accreted helium envelope; a violent merger model of two white dwarfs; and deflagrations and delayed detonations in Chandrasekhar mass white dwarfs. We focus on the iron peak elements Mn, Zn, and Cu. To this end, we also briefly review the different burning regimes and production sites of these elements, as well as the results of abundance measurements and several galactic chemical evolution studies. We find that super-solar values of [Mn/Fe] are not restricted to Chandrasekhar mass explosion models. Scenarios including a helium detonation can significantly contribute to the production of Mn, in particular the models proposed for calcium-rich transients. Although Type Ia supernovae are often not accounted for as production sites of Zn and Cu, our models involving helium shell detonations can produce these elements in super-solar ratios relative to Fe. Our results suggest a re-consideration of Type Ia supernova yields in galactic chemical evolution models. A detailed comparison with observations can provide new insight into the progenitor and explosion channels of these events

Conceptualizing childhood health problems using survey data: a comparison of key indicators

<p>Abstract</p> <p>Background</p> <p>Many definitions are being used to conceptualize child health problems. With survey data, commonly used indicators for identifying children with health problems have included chronic condition checklists, measures of activity limitations, elevated service use, and health utility thresholds. This study compares these different indicators in terms of the prevalence rates elicited, and in terms of how the subgroups identified differ.</p> <p>Methods</p> <p>Secondary data analyses used data from the National Longitudinal Survey of Children and Youth, which surveyed a nationally representative sample of Canadian children (n = 13,790). Descriptive analyses compared healthy children to those with health problems, as classified by any of the key indicators. Additional analyses examined differences between subgroups of children captured by a single indicator and those described as having health problems by multiple indicators.</p> <p>Results</p> <p>This study demonstrates that children captured by any of the indicators had poorer health than healthy children, despite the fact that over half the sample (52.2%) was characterized as having a health problem by at least one indicator. Rates of child ill health differed by indicator; 5.6% had an activity limitation, 9.2% exhibited a severe health difficulty, 31.7% reported a chronic condition, and 36.6% had elevated service use. Further, the four key indicators captured different types of children. Indicator groupings differed on child and socio-demographic factors. Compared to children identified by more than one indicator, those identified only by the severe health difficulty indicator displayed more cognitive problems (p < 0.0001), those identified only by the chronic condition checklist had a greater likelihood of reporting allergies or asthma (p < 0.0001), and those identified as having elevated service use only were more affluent (p = 0.01) and showed better overall health (p < 0.0001). Children identified by only a single indicator were less likely to have serious health problems than those identified by two or more indicators.</p> <p>Conclusion</p> <p>We provide information useful to researchers when selecting indicators from survey data to identify children with health problems. Researchers and policy makers need to be aware of the impact of such definitions on prevalence rates as well as on the composition of children classified as being in poor health.</p

No self-similar aggregates with sedimentation

Two-dimensional cluster-cluster aggregation is studied when clusters move both diffusively and sediment with a size dependent velocity. Sedimentation breaks the rotational symmetry and the ensuing clusters are not self-similar fractals: the mean cluster width perpendicular to the field direction grows faster than the height. The mean width exhibits power-law scaling with respect to the cluster size, ~ s^{l_x}, l_x = 0.61 +- 0.01, but the mean height does not. The clusters tend to become elongated in the sedimentation direction and the ratio of the single particle sedimentation velocity to single particle diffusivity controls the degree of orientation. These results are obtained using a simulation method, which becomes the more efficient the larger the moving clusters are.Comment: 10 pages, 10 figure