In the originally published version of this article, the authors neglected to include the following paragraph in the Experimental Procedures:''Mice were monitored at regular intervals for up to 36 hr for the following signs of moribund condition: sustained hypothermia (body temperature < 30 C for more than 1 hr, as measured by the infrared thermometer), lethargy, dehydration, change in color of mucous membranes, and labored breathing. We determined that mice showing more than three of the indicated signs were moribund and euthanized them promptly with CO 2 .''The paragraph has been added under the section Murine Challenges with Bacteria and Surgeries, and the corrected paper now appears online. The authors regret any confusion this omission may have caused.

This article discusses the accessibility of two content management systems, Berkeley Electronic Press's Digital Commons and OCLC's CONTENTdm, widely used in libraries to host institutional repository and digital collections content. Based on observations by a visually impaired student who used the JAWS screen reader to view the design and display of digital objects in both systems, we provide a general overview of the accessibility of each system. We discuss potential suggestions for accessibility-related improvements, and we offer ideas for library administrators of these systems about how to maximize the back-end configurations for accessibility.

Jamaica's shoreline is at the intersection of five major petroleum tanker shipping routes, and is a cargo transshipment point for the Caribbean. The natural coastline resources are valuable economically, with two-thirds of exchange dollars coming through tourism associated with beaches, clear waters, coral reefs, and nearshore fishing. The most thorough examination of the feasibility of using dispersants ever carried out in a developing nation has been undertaken. Dispersant toxicity of various species of critical matrix organisms has been carried out with an array of 12 dispersants. Corals, fish, seagrasses, and mangroves were tested. Toxic dispersants and three very low toxicity compounds were identified at concentrations ten times those likely to occur and ten times longer exposures. Thus, a safety factor was built in. A sensitivity map of the coastline was constructed. Simulations of “near-miss” tanker accidents were done manually with disperse and nondisperse options. A policy study of European and North American dispersant use was undertaken by the Office of Disaster Preparedness, the Coast Guard and the Oil Spill Committee. A draft policy was prepared for nontoxic dispersant use. The recommendations for use of nontoxic dispersants—with primarily coral reef and fish sensitivity as paramount concerns—are Cold Clean, Corexit 9550 and Finasol OSR7. Several European nations also have approved lists with Corexit 9550 (or allied products) and Finasol OSR-7. A computer simulation of all potential occurrences is the future goal.

No abstract

This paper presents the results of an ongoing study to investigate the use of viscoelastic passive damping technology to decrease the vibroacoustic response of avionics equipment in typical satellite systems. The Inertial Upper Stage, which is subjected to the severe launch vibroacoustic environment of the Space Shuttle and Titan launch vehicles, was selected as the baseline satellite system for this study. The design and analysis of damping treatments were first carried out on a component test structure using finite element analysis and the modal strain energy method. A series of modal survey and acoustic tests on the test structure were performed to validate the analytical procedures and evaluate the effectiveness of the designed damping treatments. The selection and characterization of viscoelastic materials with respect to their performance in space is also discussed.