Nonmigrating semidiurnal tide over the Arctic determined from TIMED Doppler Interferometer wind observations

Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/94847/1/jgrd15899.pd

Morphological and Physiological Response of Planeleaf Willow (Salix Planifolia Pursh.) to Simulated Browsing

Morphological and physiological responses of planeleaf willow (Salix planefolia Pursh.) to simulated browsing were studied under controlled conditions. The treatments consisted of every combination of three clipping intensities (30%, 60% and 90% of current twigs length removal) and three clipping timings (late winter, early spring and mid-summer). Increased clipping intensity stimulated bud activation; increased total leaf area and leaf size and increased the length of current year’s twigs. Mid-summer browsing increased the total number of leaves, the number of current twigs and decreased the length of current twigs. Higher browsing intensity resulted in higher photosynthetic rate of recently matured leaves

Circumstellar Na I and Ca II lines in type IIP supernovae and SN 1998S

We study a possibility of detection of circumstellar absorption lines of Na I D$_{1,2}$ and Ca II H,K in spectra of type IIP supernovae at the photospheric epoch. The modelling shows that the circumstellar lines of Na I doublet will not be seen in type IIP supernovae for moderate wind density, e.g., characteristic of SN 1999em, whereas rather pronounced Ca II lines with P Cygni profile should be detectable. A similar model is used to describe Na I and Ca II circumstellar lines seen in SN 1998S, type IIL with a dense wind. We show that line intensities in this supernova are reproduced, if one assumes an ultraviolet excess, which is caused primarily by the comptonization of supernova radiation in the shock wave.Comment: To be published in Astronomy Letter

TIMED Doppler Interferometer on the Thermosphere Ionosphere Mesosphere Energetics and Dynamics satellite: Data product overview

Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/94699/1/jgra18252.pd

Obtaining Consent from Both Parents for Pediatric Research: What Does "Reasonably Available" Mean?

Circumstances surrounding parental availability and decision-making were examined in the setting of a research protocol involving newborn screening (NBS) for fragile X syndrome, in which the institutional review board (IRB) had determined that consent (permission) was required from both parents

Detection of X-Ray Emission from the Arches Cluster near the Galactic Center

The Arches cluster is an extraordinarily compact massive star cluster with a core radius of about 10\u27\u27 (~0.4 pc) and consisting of more than 150 O star candidates with initial stellar masses greater than 20 M near G0.12-0.02. X-ray observations of the radio Arc near the Galactic center at l ~ 02, which contains the Arches cluster, have been carried out with the Advanced CCD Imaging Spectrometer (ACIS) on board Chandra X-Ray Observatory. We report the detection of two X-ray sources from the Arches cluster embedded within a bath of diffuse X-ray emission extending beyond the edge of the cluster to at least 90\u27\u27 × 60\u27\u27 (3.6 pc × 2.4 pc). The brightest component of the X-ray emission coincides with the core of the cluster and can be fitted with a two-temperature thermal spectrum with a soft and hard component of 0.8 and 6.4 keV, respectively. The core of the cluster coincides with several ionized stellar wind sources that have previously been detected at radio wavelengths, suggesting that the X-ray emission from the core arises from stellar wind sources. The diffuse emission beyond the boundary of the cluster is discussed in the context of combined shocked stellar winds escaping from the cluster. We argue that the expelled gas from young clusters such as the Arches cluster may be responsible for the hot and extended X-ray--emitting gas detected throughout the inner degree of the Galactic center

Niccolo Machiavelli, cultural intermediaries and the category of achieved celebrity

The escalating interest in celebrity studies has not translated into a serious enquiry into the origins of the subject in social and political theory. Instead, celebrity has been usually explained as either the reflection of industrialisation or the expression of timeless, unchanging fate. The result is a distorted, compressed time frame in which the phenomenon is located in unsatisfactory, metaphysical accounts of the position of celebrity in the social order. This paper aims to redress the balance by demonstrating the profound importance of cultural intermediaries in the social construction of celebrity. I argue that the birth of cultural intermediaries lies in Florentine civic humanism. Machiavelli’s The Prince has been celebrated as a major contribution to the acquisition and effective management of tyrannical power. There is ample reason to hold this view. At the same time, this interpretation is too limiting. When read from the standpoint of the rise of Florentine civic humanism, the text is also, transparently, a contribution to the successful engineering of renown. More particularly, in this respect, it offers a prototypical understanding of cultural intermediaries. As such, this paper contends that Machiavelli’s study is a seminal contribution to the study of celebrity. Machiavelli formulates impersonal principles on exposure management and the accumulation of attention capital that are presented as the preserve of civil experts. Far from being the high-water mark of tyrannical power, The Prince is evidence of the growth of civic humanism and the ascending importance of expertise in managing fame. The paper aims to revise the boundaries of celebrity studies by demonstrating the canonical significance of Machiavelli’s text. Further, it proposes that cultural intermediaries are seminal in the emergence and development of the fame economy

TIMED Doppler Interferometer: Overview and recent results

Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/94617/1/jgra18230.pd