18,138 research outputs found

    The Magsat Bibliography

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    Publications related to the Magsat project number 228, as of March 1987 are listed. Of these, 34 deal with analysis of the Earth's main magnetic field, 125 with analysis of the Earth's crustal field, and 42 with analysis of the magnetic field originating external to the Earth. The remainder document the Magsat program, satellite, instruments or data are review papers. The bibliography is divided into two parts. The first lists all papers by first author; the second is subdivided by topic

    The Magsat bibliography. Revision 1

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    Publications related to the Magsat project number 402, as of February 1991 are presented. Of these, 44 deal with analysis of the Earth's main magnetic field, 209 deal with analysis of the Earth's crustal field, 43 make use of Magsat-based main field models, and 63 deal with analyses of the magnetic field originating external to the Earth. The remainder documents the Magsat program, satellite, instruments, or data, or are review papers or books which use or refer to Magsat and its data. The Bibliography is divided into two parts; the first lists all papers by first author, and the second is subdivided by topic

    The Conformal Anomaly in General Rank 1 Symmetric Spaces and Associated Operator Product

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    We compute the one-loop effective action and the conformal anomaly associated with the product ⨂pLp\bigotimes_p{\cal L}_p of the Laplace type operators Lp,p=1,2{\cal L}_p, p=1,2, acting in irreducible rank 1 symmetric spaces of non-compact type. The explicit form of the zeta functions and the conformal anomaly of the stress-energy momentum tensor is derived.Comment: 10 pages, LaTe

    A Comparison of Semi-Analytic and Smoothed Particle Hydrodynamics Galaxy Formation

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    We compare the statistical properties of galaxies found in two different models of hierarchical galaxy formation: the semi-analytic model of Cole et al. and the smoothed particle hydrodynamics (SPH) simulations of Pearce et al. Using a `stripped-down' version of the semi-analytic model which mimics the resolution of the SPH simulations and excludes physical processes not included in them, we find that the two models produce an ensemble of galaxies with remarkably similar properties, although there are some differences in the gas cooling rates and in the number of galaxies that populate halos of different mass. The full semi-analytic model, which has effectively no resolution limit and includes a treatment of star formation and supernovae feedback, produces somewhat different (but readily understandable) results. Agreement is particularly good for the present-day global fractions of hot gas, cold dense (i.e. galactic) gas and uncollapsed gas, for which the SPH and stripped-down semi-analytic calculations differ by at most 25%. In the most massive halos, the stripped-down semi-analytic model predicts, on the whole, up to 50% less gas in galaxies than is seen in the SPH simulations. The two techniques apportion this cold gas somewhat differently amongst galaxies in a given halo. This difference can be tracked down to the greater cooling rate in massive halos in the SPH simulation compared to the semi-analytic model. (abridged)Comment: 19 pages, 13 figures, to appear in MNRAS. Significantly extended to explore galaxy progenitor distributions and behaviour of models at high redshift

    Development of techniques for producing static strata maps and development of photointerpretation methods based on multitemporal LANDSAT data

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    The progress of research conducted in support of the Large Area Crop Inventory Experiment (LACIE) is documented. Specific tasks include (1) evaluation of the static stratification procedure and modification of that procedure if warranted, and (2) the development of alternative photointerpretative techniques to the present LACIE procedures for the identification and selection of training fields (areas)

    Development of techniques for producing static strata maps and development of photointerpretive methods based on multitemporal LANDSAT data

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    Progress in the evaluation of the static stratification procedure and the development of alternative photointerpretive techniques to the present LACIE procedure for the identification of training fields is reported. Statistically significant signature controlling variables were defined for use in refining the stratification procedure. A subset of the 1973-74 Kansas LACIE segments for wheat was analyzed

    Pacifism and Emotional Arousal

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    Excerpt: At the age of eighteen, American youths must make an ideological decision about war. Although most probably perceive selective service registration as little more than a rite of passage, others struggle with the ethics of military service and options of conscientious objection. What can be said of youths who decide, for moral and religious reasons, that they will not be involved in warfare? To date, no descriptive studies have been reported that address this question. Previous studies on pacifism focus on the likelihood of pacifism in eliciting cooperation (Gruder & Duslak, 1973; Marwell & Schmitt, 1973) or aggression (Borden, 1975; Borden & Taylor, 1976; Fitz, Kimble, & Heidenfelder, 1979; Fitz, Marwit, & Gerstenzang, 1983; Kimble, Fitz, Onorad, 1977; Mander & Gaebelein, 1977). Moreover, these studies have typically recruited participants who were assigned pacifistic strategies rather than recruiting those with pre-existing pacifistic inclinations
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