Who's Who in Pacific Navigation最新文献

Index 指数

Who's Who in Pacific Navigation Pub Date : 2019-09-30 DOI: 10.2307/j.ctvp7d58v.30

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[A] (一)

Who's Who in Pacific Navigation Pub Date : 2019-09-30 DOI: 10.2307/j.ctvp7d58v.6

Étienne Delaire

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A Note on Ranks and Titles 职级和头衔说明

Who's Who in Pacific Navigation Pub Date : 2019-09-30 DOI: 10.2307/j.ctvp7d58v.5

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Selected Bibliography 选定的参考书目

Who's Who in Pacific Navigation Pub Date : 2019-09-30 DOI: 10.2307/j.ctvp7d58v.29

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[C] [C]

Who's Who in Pacific Navigation Pub Date : 2005-07-26 DOI: 10.2307/j.ctvp7d58v.8

A. Miles

{"title":"[C]","authors":"A. Miles","doi":"10.2307/j.ctvp7d58v.8","DOIUrl":"https://doi.org/10.2307/j.ctvp7d58v.8","url":null,"abstract":"We performed combined focused ion beam /transmission electron microscopy studies to investigate the chemistry and structure of eight presolar silicate grains that were previously detected by NanoSIMS oxygen isotope mapping of the carbonaceous chondrite Acfer 094. The analyzed presolar silicates belong to the O isotope Groups I/II (17O-enriched and 18O-depleted) and therefore come from 1–2.5 M asymptotic giant branch stars of close-tosolar or slightly lower-than-solar metallicity. Three grains are amorphous, Mg-rich, and show a variable, but more pyroxene-like composition. Most probably, these grains have formed under circumstellar low-temperature conditions below the crystallization temperature. Three grains are Fe-bearing glasses similar to the “glass with embedded metal and sulfides” (GEMS) grains found in interplanetary dust particles. However, two of the meteorite GEMS grains from this study lack comparatively large ( 20 nm) Fe-rich inclusions and have sulfur contents <1 at.%, which is different than observed for the majority of GEMS grains. These grains likely condensed under strong non-equilibrium conditions from an Si-enriched gas. One olivine is characterized by a crystalline core and an amorphous, more Fe-rich rim, which is probably the result of interstellar medium sputtering combined with Mg removal. The detection of another olivine with a relatively high Fe content (Mg# 0.9) shows that circumstellar crystalline silicates are more Fe-rich than astrophysical models usually suggest. The overall predominance of olivine among the crystalline silicate stardust population compared to pyroxene indicates preferential formation or survival of this type of mineral. As pyroxene is indeed detected in circumstellar outflows, it remains to be seen how this result is compatible with astrophysical observations and experimental data.","PeriodicalId":352944,"journal":{"name":"Who's Who in Pacific Navigation","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129229750","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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[I] [我]

Who's Who in Pacific Navigation Pub Date : 1890-12-31 DOI: 10.2307/j.ctvcszz3b.16

Martin Meschede, H. Murawski, W. Meyer

{"title":"[I]","authors":"Martin Meschede, H. Murawski, W. Meyer","doi":"10.2307/j.ctvcszz3b.16","DOIUrl":"https://doi.org/10.2307/j.ctvcszz3b.16","url":null,"abstract":"The statistical distribution representing bid values constitutes an essential part of many auction models and has involved a wide range of assumptions, including the Uniform, Normal, Lognormal and Weibull densities. From a modelling point of view, its goodness is defined by how well it enables the probability of a particular bid value to be estimated – a past bid for ex-post analysis and a future bid for ex-ante (forecasting) analysis. However, there is no agreement to date of what is the most appropriate form and empirical work is sparse. Twelve extant construction datasets from four continents over different time periods are analysed in this paper for their fit to a variety of candidate statistical distributions assuming homogeneity of bidders (ID not known). The results show there is no one single fit-all distribution, but that the 3p Log-Normal, Fréchet/2p Log-Normal, Normal, Gamma and Gumbel generally rank the best ex-post, and the 2p Log-Normal, Normal, Gamma and Gumbel the best ex-ante – with ex-ante having around three to four times worse fit than ex-post. Final comments focus on the results relating to the third and fourth standardised moments of the bids and a posthoc rationalisation of the empirical outcome of the analysis.","PeriodicalId":352944,"journal":{"name":"Who's Who in Pacific Navigation","volume":"762 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1890-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133153923","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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