Ballistics Analysis of Volcanic Ejecta: Miter Crater, Ice Springs Volcanic Field, Black Rock Desert, Utah

Ice Springs Volcanic Field, located in the Black Rock Desert west of Fillmore, Utah, is composed of three large craters, Crescent, Miter, and Terrace, and several smaller craters. Concern over the hazards of the volcanic field, ±660 years old, reactivating prompted the creation of a hazards model. This study focuses on Miter Crater in order to conduct a ballistic analysis of the blocks and bombs observed along the crater rim. Data analysis of Miter Crater ejecta was then used to create a hazards model for ballistic volcanic ejecta. Thirty-four blocks and bombs were recorded along the rim of Miter Crater. Teardrop, quot (cowpie), spheroidal, and ribbon bombs were recorded and sampled around the crater rim. All blocks sampled were massive basalts and were found in situ in the northeastern quadrant (the only undisturbed section of Miter Crater from quarrying). Data collected was then used to model possible trajectories and muzzle velocities for each block and bomb according to their respective recorded parameters in the program Eject!. The application of drag to large, dense blocks did little to change flight paths. With smaller blocks and bombs, the effect of drag on flight paths became increasingly dramatic at higher ejection angles. The eruptions involving these blocks and bombs likely experienced a relatively large zone of reduced drag and/or multiple collisions that aided in the transport of smaller ejecta. A hazards map was created that shows four zones of differing risk levels. Intuitively, the level of risk due to ejecta impact decreases as one heads away from the eruptive center. The extent of the largest zone reaches approximately 1300 m in diameter. A model was devised that used a polar plot to prove the risk trend shown in the hazards map. The model was also used to create ballistic curves for conditions of zero drag, constant drag, and zones of reduced drag

Transit Connector: A Study of Cargo Terminals for United States Shipping Lines, Inc.

The most costly factor in modern shipping is the quantity of time involved in the discharging and loading of cargo. The earning capacity of a ship depends largely on the rapidity of its turn-around or the number of voyages it can make in a year, and the turn-around can be increased to a large extent only by preventing delay in port. For a successful operation the ship\u27s time in port must be as brief as possible. Whether at sea or in port, all the major items of expense, with the exception of fuel consumption, continue day in and out. Major operating expenses such as the crew\u27s wages, the officer\u27s salaries, and subsistence for the ship\u27s company must be paid for every day. Other items of expense while the ship is in port include the fuel required to operate winches, dynamos, and other machinery on board, and to keep the ship heated in the winter. Each day represents an outlay of money with no compensating income from freight moneys. In addition the ship\u27s company must be concerned with the overhead charges of insurance, interest on capital, and depreciation, which all mount to a considerable sum per day

Studies on the Molecular Cloning of Aryletherase From a Ligninolytic Erwinia Sp.: Enhancement of Gene Expression.

Recombinant DNA techniques were used to enhance the expression of a gene encoding aryletherase activity. This gene, apparently lacking regulatory elements, was present on a 792bp BamHI DNA fragment of Erwinia sp. genomic DNA, that was cloned into Escherichia coli using the plasmid vector pBR322. To obtain a larger fragment of Erwinia genomic DNA carrying the aryletherase gene and its regulatory regions, an Erwinia sp. genomic DNA library was constructed in the lambda phage EMBL3. Screening the library with nick translated 792bp BamHI fragment identified several recombinant phage which demonstrated homology with the probe. Restriction digestion of DNA from one of these phage tentatively localized the 792bp BamHI fragment within a 3.1kb SmaI fragment. Restriction endonuclease mapping of the 3.1kb SmaI fragment, subcloned into pUC19, confirmed the presence of the 792bp fragment with flanking regions of Erwinia genomic DNA. E. coli transformants harboring the recombinant plasmids pJC39 or pJC2 stably expressed etherase activity which was assayed by the release of p-nitrophenol from p-nitrophenyl-(beta)-D-glucoside (PNPG). Transformants also degraded the lignin model compound vanillin by a mechanism thought to involve demethoxylation via ether cleavage. Tn5 mutagenesis localized the putative etherase gene within a 2100bp BamHI-SmaI region of the 3.1kb insert of pJC39

The Special Study of Securities Markets of the Securities and Exchange Commission

Moved perhaps by a certain institutional egoism, the Securities and Exchange Commission welcomes this thorough symposium upon the Report of Special Study of Securities Markets. Although the product of a separate study group, this report has nevertheless been the focal point of debate throughout the Commission during the past eighteen months. Representing both an intensive and extensive inquiry into the securities markets, it is unquestionably the most ambitious and comprehensive study since the passage of the securities acts thirty years ago. It is not a sensational document-quite consciously. In our opinion, raising standards in the securities industry could best be achieved by thorough documentation, responsible analysis, and constructive criticism. Upon this premise it warrants thoughtful but critical review