The pre-launch event simulation and reconstruction performed beyond our expectations for real data, essentially without modification, and made possible the immediate start of science analysis. But the on-orbit data exhibit unanticipated features that necessitate upgrades to both the simulation (essentially complete) and the reconstruction (ongoing). The major new effect encountered on orbit is the presence of "ghosts," that is, remnant detector response to particles passing through the detector before the particle that triggered the event. These ghosts appear primarily in the form of extra tracks and/or energy deposits. As part of this upgrade, we plan to enhance our ability to discriminate against background particles by introducing additional analysis during the reconstruction phase. We present a description of the effect of ghosts, and of the work needed to deal with them, done and planned, as well as some other ideas for improving the reconstruction.

Head & NeckVolume 14, Issue 5 p. 430-430 Book Review Anatomical atlas of the temporomandibular joint. Edited by Yoshinobu Ide, Katshuiro Nakazawa. Quintessence Publishing Co., Inc., Chicago, Illinois, 1991, 116 pp, $142.00 Robert P. Johnson DDS, MSD, Robert P. Johnson DDS, MSD Sun Antonio, Texas San Antonio, TexasSearch for more papers by this authorSteven B. Buckley DDS, MD, Steven B. Buckley DDS, MD Sun Antonio, Texas San Antonio, TexasSearch for more papers by this author Robert P. Johnson DDS, MSD, Robert P. Johnson DDS, MSD Sun Antonio, Texas San Antonio, TexasSearch for more papers by this authorSteven B. Buckley DDS, MD, Steven B. Buckley DDS, MD Sun Antonio, Texas San Antonio, TexasSearch for more papers by this author First published: September/October 1992 https://doi.org/10.1002/hed.2880140518AboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Share a linkShare onFacebookTwitterLinkedInRedditWechat No abstract is available for this article. Volume14, Issue5September/October 1992Pages 430-430 RelatedInformation

The hydraulic characteristics of a cross-flow rearing unit of 20.3 m3 capacity were identified, based on an analysis of residence time distribution (RTD), and compared with the characteristics of a standard rectangular vessel. A tilapia (Oreochromis aureus) production trial was also conducted, in triplicate, within each of the two tank types. Results of the RTD analyses confirmed that the cross-flow rearing unit provided mixed flow reactor behaviour despite its rectangular shape. Hydraulic performance was improved over that of an earlier design by repositioning the influent and effluent manifolds at floor level and by rounding the lower sides of the vessel to streamline flow. Influent jet wake distributed uniformly over the tank floor provided surface velocities of 10.0 to 14.7 cm/s with a manifold pressure of 0.6-1.65 m H2O (gauge). The jet wake and resultant cross-flow circulation pattern continuously purged fecal solids and waste feed at a water exchange rate of 1.4 per hour. Whole body composition, mortality, lengths, and weights of tilapia produced in both tank types did not differ significantly (P < 0.05). The food conversion ratio was higher (P < 0.05) in the cross-flow than the standard rectangular vessel (2.12 versus 1.85 kg feed/kg gain), while net oxygen consumption (2.56 versus 2.85 g O2/kg biomass d) and ammonia excretion (126.3 versus 162.7 mg NH4-N/kg biomass d) were lower. The cross-flow design appears particularly suited for high-density culture applications that require minimal flow.

Reconstructive oral and maxillofacial surgeons often find the need for additional soft tissue even when a myocutaneous flap has been previously placed. This article introduces the principles, technique, and results of 32 “walk-up” muscle flaps derived from existing myocutaneous flaps. The anastomotic vascular ingrowth at the original myocutaneous flap's distal end permits its proximal detachment and axial vessel ligation to rotate the proximal two thirds to a tissue-deficient site. In our experience at the University of Miami, these flaps have been predictable (97% viable transfer rate), have provided vascular soft tissue in deficient areas, and have been skin grafted at their surface to increase oral lining or skin cover, among several other uses.

Thyroglossal-tract cyst should be included in the differential diagnosis of any mass found in the anterior midline of the neck. A discussion and review of forty-two cases diagnosed between 1970 and 1976 at Wilford Hall USAF Medical Center are presented.