1,772,781 research outputs found
EJAMS - FISH 560
No full textThe ecological sciences have experienced immense growth over the course of this century, and chances are that they will continue to grow well on into the next millennium. There are some good reasons for this – ecology encompasses some of the most pressing concerns facing humanity. With recent advances in data collection technology and ambitious field research, ecologists are increasingly calling upon multivariate statistics to explore and test for patterns in their data. The goal of FISH 560 (Applied Multivariate Statistics for Ecologists) at the University of Washington is to introduce graduate students to the multivariate statistical techniques necessary to carry out sophisticated analyses and to critically evaluate scientific papers using these approaches. It is a practical, hands-on course emphasizing the analysis and interpretation of multivariate analysis, and covers the majority of approaches in common use by ecologists. To celebrate the hard work of past students, I am pleased to announce the creation of the Electronic Journal of Applied Multivariate Statistics (EJAMS). Each year, students in FISH 560 are required to write a final paper consisting of a statistical analysis of their own multivariate data set. These papers are submitted to EJAMS at the end of quarter and are peer reviewed by two other class members. A decision on publication is based on the reviewers’ recommendations and my own reading the paper. In closing, there is a need for the rapid dissemination of ecological research using multivariate statistics at the University of Washington. EJAMS is committed to this challenge
Going Beyond Counting First Authors in Author Co-citation Analysis
No full textThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Appropriate Similarity Measures for Author Cocitation Analysis
No full textWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
Petrology of ultramafic rocks at DSDP Holes 82-556, 82-558, and 82-560
No full textStrongly serpentinized peridotites occur at shallow crustal levels at DSDP Sites 556 (35-Ma-old crust), 558 (35-Maold crust), and 560 (12-Ma-old crust) in the North Atlantic. Primary peridotite silicate minerals are preserved only at Sites 556 and 558, but all three sites have primary spinel preserved. The serpentinites at all three sites were probably spinel harzburgite tectonites, with little or no clinopyroxene.
For orthopyroxene from Site 556, Mg/(Mg+Fe) ratios average 0.904, and Al2O3 contents are about 2.0-3.3 wt.%. Compositions of pyroxene-derived bastites from Sites 558 and 560 suggest that the original pyroxenes were probably low-alumina orthopyroxene. Spinels from all three sites have low Fe3+ and TiO2. Spinels from Sites 556 and 560 have high Cr/(Cr+Al) (0.45-0.53). Those from Site 558 have Cr/(Cr+Al) values that are among the highest measured for any plagioclase-free oceanic peridotites (0.55-0.62).
Whole-rock chemistry, although affected by serpentinization, suggests that the peridotites had relatively low CaO, TiO2, Al2O3, and Na2O. Mineral and whole-rock chemistry and modal abundances suggest that Leg 82 peridotites are residua from partial melting, and that the extent of partial melting may have been greater in this region than farther south in the North Atlantic, or that the mantle was originally more depleted here
Error plot for 560 × 560 space Shuttle control matrix.
No full textError plot for 560 × 560 space Shuttle control matrix.</p
Variations on the Author
No full text“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
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