Population analysis of open clusters: radii and mass segregation

Aims: Based on our well-determined sample of open clusters in the all-sky catalogue ASCC-2.5 we derive new linear sizes of some 600 clusters, and investigate the effect of mass segregation of stars in open clusters. Methods: Using statistical methods, we study the distribution of linear sizes as a function of spatial position and cluster age. We also examine statistically the distribution of stars of different masses within clusters as a function of the cluster age. Results: No significant dependence of the cluster size on location in the Galaxy is detected for younger clusters (< 200 Myr), whereas older clusters inside the solar orbit turned out to be, on average, smaller than outside. Also, small old clusters are preferentially found close to the Galactic plane, whereas larger ones more frequently live farther away from the plane and at larger Galactocentric distances. For clusters with (V - M_V) < 10.5, a clear dependence of the apparent radius on age has been detected: the cluster radii decrease by a factor of about 2 from an age of 10 Myr to an age of 1 Gyr. A detailed analysis shows that this observed effect can be explained by mass segregation and does not necessarily reflect a real decrease of cluster radii. We found evidence for the latter for the majority of clusters older than 30 Myr. Among the youngest clusters (between 5 and 30 Myr), there are some clusters with a significant grade of mass segregation, whereas some others show no segregation at all. At a cluster age between 50 and 100 Myrs, the distribution of stars of different masses becomes more regular over cluster area. In older clusters the evolution of the massive stars is the most prominent effect we observe.Comment: 14 pages, 12 figures, accepted for publication in Astronomy & Astrophysic

Dionysus Torn to Pieces: An Examination of The Sound and the Fury in Light of the Philosophy of Friedrich Nietzsche

Over the course of this thesis the author considers the problem of truth in life as manifested in William Faulkner’s The Sound and the Fury by means of the Nietzschean conception of the Dionysian. The examination unfolds in a sequential analysis of the novel’s four sections, an analysis framed by Nietzsche’s four theses on “‘Reason’ in Philosophy:” the author considers the first section (Ben) symbolic of man’s subversion to what is directly before his eyes, and yet discovers in Ben’s idiocy a refutation of that same apparent reality in a presently-realized past, personified in Ben’s sister, Caddy; the bounds and liberties of perspective realized, the author considers how in the second section (Quentin) the limits and illusions of perspective defy rationality, and turn cultural truths into the heralds of their own apparent destruction yet aesthetic apotheosis; in the third section (Jason), the author discovers the hollow core of Jason’s morality, and ultimately recognizes in the final brother’s illusions and rationalities a meaningless martyrdom of a present believed by Jason to be denied him by the past; the author ultimately discovers what meaning the three brothers’ perspectives signify—namely, Pandora’s solace—in the novel’s blacks—specifically, Dilsey—before confronting the nihilistic implications of Ben’s recurring agony and bliss in the novel’s torturous final scene. The author concludes that the ultimate depravity of the novel, when considered the effect of the artist’s journey through the brothers’ purely perspectival realities, renders both truth and appearance moot in the fruitfulness, agony, and destruction of life. This allows the author not to deprive The Sound and the Fury of its depths of experience, but actually celebrate those depths as the necessary effect of life within a culture hostile to life

University High Highlights 11/19/1958

This is the student newspaper from University High School, the high school that was on the campus of Western Michigan University, then called University High Highlights, in 1958

Spartan Daily, October 16, 2003

Volume 121, Issue 35https://scholarworks.sjsu.edu/spartandaily/9901/thumbnail.jp

Spartan Daily, October 16, 2003

Volume 121, Issue 35https://scholarworks.sjsu.edu/spartandaily/9901/thumbnail.jp

Taxonomic review of the Neotropical Tetragonoderus quadriguttatus assemblage (Coleoptera: Carabidae: Cyclosomini) with description of T. deuvei, new species, and new West Indian and Nearctic locality records

The Tetragonoderus (Peronoscelis) quadriguttatus assemblage is a postulated monophyletic part of the intersectus complex. This assemblage is characterized against a background that includes review of a classification of the genus and comparison, in the form of a key, to other unrelated Western Hemisphere genera that share elongate tibial spurs with Tetragonoderus Dejean. The principal, easily observed feature that unites the three members (T. laevigatus Chaudoir, 1876; T. deuvei, new species (type locality: Cuijaba, Mato Grosso, Brazil), and T. quadriguttatus Dejean) of the quadriguttatus assemblage is the four-spotted elytra (two spots per elytron). These species are treated in detail, including key, synonymy (as required), comparisons, description (external and male genitalic features), habitat (if known), locality data, and geographical range map. Also, T. subfasciatus Putzeys, 1846, the elytral color pattern of whose members may be confused with the spotted pattern of the quadriguttatus assemblage, is treated similarly. The following new synonymies were established: T. quadriguttatus Dejean 1829 = T. columbicus Steinheil 1875 = T. lacordairei Chaudoir 1876 = T. tetragrammus Chaudoir 1876; and T. laevigatus Chaudoir 1876 = T. chaudoiri Liebke 1928 (replacement name for the junior homonym, T. unicolor Chaudoir, 1876). Lectotypes are designated for T. unicolor Chaudoir, T. lacordairei Chaudoir, and T. subfasciatus Putzeys. A neotype is designated for T. quadriguttatus Dejean. New distribution records in the West Indies for T. quadriguttatus are recorded for the islands of Grand Cayman, Jamaica and Hispaniola. These records may be the result of recent natural overseas dispersal from northern South America, or they may be the result of human-mediated accidental introduction, or a combination of both. The southern Floridian (Nearctic) records for T. laevigatus probably represent a recent accidental introduction through commerce, followed by dispersal through flights of adults

Spartan Daily, May 22, 1950

Volume 38, Issue 138https://scholarworks.sjsu.edu/spartandaily/11402/thumbnail.jp