In astronomy, the Pleiades , or Seven Sisters , is an open star cluster containing middle-aged hot B-type stars located in the constellation of Taurus. It is among the nearest star clusters to Earth and is the cluster most obvious to the naked eye in the night sky. The celestial entity has several meanings in different cultures and traditions.The cluster is dominated by hot blue and extremely luminous stars that have formed within the last 100 million years. Dust that forms a faint reflection nebulosity around the brightest stars was thought at first to be left over from the formation of the cluster , but is now known to be an unrelated dust cloud in the interstellar medium, through which the stars are currently passing. Computer simulations have shown that the Pleiades was probably formed from a compact configuration that resembled the Orion Nebula. Astronomers estimate that the cluster will survive for about another 250 million years, after which it will disperse due to gravitational interactions with its galactic neighborhood. Wikipedia.
Clinical Cases in Mineral and Bone Metabolism | Year: 2010
Complications of the bone-healing process, especially in elderly, osteoporotic patients, are cause of important medical and economical burden. At the same time, there is no clinical study today to have shown the efficacy of a pharmacological treatment to enhance fracture repair. The author analyzes the potential criteria that could be used for the evaluation of treatment efficacy to enhance fracture healing in the frame of a clinical study. Source
Siegel M.,Boston University |
Ross C.S.,United Virtual |
King III C.,Greylock McKinnon Associates |
King III C.,Pleiades
American Journal of Public Health | Year: 2013
Objectives. We examined the relationship between levels of household firearm ownership, as measured directly and by a proxy-the percentage of suicides committed with a firearm-and age-adjusted firearm homicide rates at the state level. Methods. We conducted a negative binomial regression analysis of panel data from the Centers for Disease Control and Prevention's Web-Based Injury Statistics Query and Reporting Systems database on gun ownership and firearm homicide rates across all 50 states during 1981 to 2010. We determined fixed effects for year, accounted for clustering within states with generalized estimating equations, and controlled for potential state-level confounders. Results. Gun ownership was a significant predictor of firearm homicide rates (incidence rate ratio = 1.009; 95% confidence interval = 1.004, 1.014). This model indicated that for each percentage point increase in gun ownership, the firearm homicide rate increased by 0.9%. Conclusions. We observed a robust correlation between higher levels of gun ownership and higher firearm homicide rates. Although we could not determine causation, we found that states with higher rates of gun ownership had disproportionately large numbers of deaths from firearm-related homicides. Copyright © 2013 by the American Public Health Association®. Source
Pleiades | Date: 2011-12-29
Systems, methods, and apparatus are described herein that facilitate education through an interactive illustration. The systems, methods and apparatuses can facilitate both the design of a course employing the interactive illustration at an instructor interface and education utilizing the course at an educational terminal. The design of the course can be based on a selection of an image, a selection of an activity, a selection of a development level of a student and selection of a work stage. The same image can be utilized for different activities, development levels and work stages. Additionally, tools utilized with the interactive image can be the same for different images, activities, development levels and work stages. The tools can also be the same for the design of the course and the study utilizing the course.
Pleiades | Date: 2012-01-13
Systems and methods for collecting information about a students educational and social activities from a plurality of networked sources, storing the information, and providing access to the information are provided. A collection component receives information associated with a student, including at least educational activity information. A portfolio component then associates the information in a portfolio for the student, which is stored in a data store, and an access component provide access to the portfolio. An educational activity component provides educational activities to the student and a social activity component provides a public interface and social activities for students.
Pleiades | Date: 2012-01-10
The interactive electronic book can be displayed on a dual-screen electronic device, with a first screen that displays the text of the book, and a second screen that displays the contextual references. Links to the contextual references can be displayed on the first screen alongside the text or embedded in the text. The contextual references can be historical descriptions, pictures, videos, contemporaneous writings and so on that help to put the text of the book in context. The contextual references can relate to the portion of the text that is displayed on the first screen. Different modes allow for the displayed text to be shown in marked mode, or unmarked mode. The interactive electronic book can also include testing software which tests the reader on their understanding of the text. The interactive electronic book can also be updated with new texts and contextual references.