Lake Attitash Management Plan; 2010

Management Plan and Comprehensive Lake Inventory of Lake Attitash in Amesbury/ Merrimac, M

Slide release mechanism

A releasable support device is described which is comprised of a hollow body with a sleeve extending transversely there-through for receiving the end of a support shank. A slider-latch, optionally lubricated, extends through side recesses in the sleeve to straddle the shank, respectively, in latched and released positions. The slider-latch is slid from its latched to its unlatched position by a pressure squib whereupon a spring or other pressure means pushes the shank out of the sleeve. At the same time, a follower element is lodged in and closed the hole in the body wall from which the shank was discharged. The mechanism was designed for the shuttle orbiter/external tank connection device

The Las Campanas Infra-red Survey. V. Keck Spectroscopy of a large sample of Extremely Red Objects

(Abridged) We present deep Keck spectroscopy, using the DEIMOS and LRIS spectrographs, of a large and representative sample of 67 ``Extremely Red Objects'' (EROs) to H=20.5, with I-H>3.0, in three of the Las Campanas Infrared Survey fields. Spectroscopic redshifts are determined for 44 sources, of which only two are contaminating low mass stars. When allowance is made for incompleteness, the spectroscopic redshift distribution closely matches that predicted earlier on the basis of photometric data. Our spectra are of sufficient quality that we can address the important question of the nature and homogeneity of the z>0.8 ERO population. A dominant old stellar population is inferred for 75% of our spectroscopic sample; a higher fraction than that seen in smaller, less-complete samples with broader photometric selection criteria (e.g. R-K). However, only 28% have spectra with no evidence of recent star formation activity, such as would be expected for a strictly passively-evolving population. More than ~30% of our absorption line spectra are of the `E+A' type with prominent Balmer absorption consistent, on average, with mass growth of 5-15% in the past Gyr. We use our spectroscopic redshifts to improve earlier estimates of the spatial clustering of this population as well as to understand the significant field-to-field variation. Our spectroscopy enables us to pinpoint a filamentary structure at z=1.22 in the Chandra Deep Field South. Overall, our study suggests that the bulk of the ERO population is an established population of clustered massive galaxies undergoing intermittent activity consistent with continued growth over the redshift interval 0.8<z<1.6.Comment: 27 pages, including 14 figures and appendix of spectra (at low resolution). Full resolution paper can be found at http://www.ast.cam.ac.uk/~md . To appear in MNRA

USSR: Nuclear Weapons

This is an encyclopedia article

Review - The Terrorist-Criminal Nexus

Robert J. Bunker\u27s review of Jennifer L. Hesterman\u27s book, The Terrorist-Criminal Nexus: An Alliance of International Drug Cartels, Organized Crime and Terror Groups, CRC Press 2013

The Mexican Cartel Debate: As Viewed Through Five Divergent Fields of Security Studies

The Mexican cartel debate is becoming increasingly more important to U.S. national security, however, it is also becoming ever more confused, heated, and at times downright nasty, with little agreement about what is taking place in Mexico or in other regions of the Americas, such as Guatemala, Honduras, and even this side of the U.S. border. To shed some light on this critical debate—a debate we need to have now and not later— it is the contention of this author that, since the Mexican cartel phenomena is being looked at by scholars from divergent fields of security studies and since each field of study brings with it its own key assumptions and concerns, preferred responses, terminology, works, and authors, those analyzing the problem are often talking at cross-purposes which is unproductive. Additionally, dissention among those within each individual field of study about the threat the cartels represent—the divergences among those who study insurgencies as but one important example— adds another layer of confusion to this debate