Alvin instrumentation

Also published as: 1967 NEREM record : Institute of Electrical and Electronics Engineers 9 (1967): 196-197THIS PAPER DESCRIBES the equipments used to establish the relative position of ALVIN from her mother ship, the R/V LULU. Operating procedures used at sea are also discussed. A recent review within the Deep Submergence Research Vehicle Program at WHOI established a set of conclusions and guidelines, for internal use, governing the ALVIN locating equipments and procedures.The Office of Naval Research under Contract Nonr- 3484(00)

Twenty-four (24) man-hour test of Alvin's environmental system

ALVIN's specifications call for a 48 man-hour environmental system capability. To check this, a 24 man-hour test was run as follows: Two successive test periods of six (6) hours each with a two (2) man crew inside the pressure hull. The break after six {6) hours was solely to change the crew. It was felt that this 24 man-hour exercise would be adequate to judge the system's 48 man-hour capability, particularly since one cannister of LiOH was used, and the submarine will normally carry two {2)

An acoustic navigation system

This report describes a system for underwater acoustic navigation developed, and in use, at the Woods Hole Oceanographic Institution. It includes a brief discussion of the electronic components, operation, mathematical analysis, and available computer programs. There is a series of supplementary Technical Memoranda containing more information on various aspects of the system. We believe that this kind of documentation is more flexible and better meets the needs of potential users than including all technical details in one large volume. These are not final or definitive reports; acoustic navigation capabilities will continue to evolve at W.H.O.I. for some time. Acoustic navigation provides a method of tracking a ship, and an underwater vehicle or instrument package (‘fish’), in the deep ocean. Acoustic devices attached to the ship and fish measure the length of time it takes a sound pulse to travel to acoustic transponders moored on the ocean floor. If the transponder positions and the average speed of sound are known, the ship or fish position can be found.Prepared for the Office of Naval Research under Contracts N00014-71-C0284; NR 293-008 N00014-70-C0205; NR 263-103 and the National Science Foundation/International Decade of Ocean Exploration Grant GX-36024 and the Applied Physics Laboratory of The Johns Hopkins University Contract 372111

Interleukin 12B (IL12B) Genetic Variation and Pulmonary Tuberculosis: A Study of Cohorts from The Gambia, Guinea-Bissau, United States and Argentina

We examined whether polymorphisms in interleukin-12B (IL12B) associate with susceptibility to pulmonary tuberculosis (PTB) in two West African populations (from The Gambia and Guinea-Bissau) and in two independent populations from North and South America. Nine polymorphisms (seven SNPs, one insertion/deletion, one microsatellite) were analyzed in 321 PTB cases and 346 controls from Guinea-Bissau and 280 PTB cases and 286 controls from The Gambia. For replication we studied 281 case and 179 control African-American samples and 221 cases and 144 controls of European ancestry from the US and Argentina. First-stage single locus analyses revealed signals of association at IL12B 3′ UTR SNP rs3212227 (unadjusted allelic p = 0.04; additive genotypic p = 0.05, OR = 0.78, 95% CI [0.61–0.99]) in Guinea-Bissau and rs11574790 (unadjusted allelic p = 0.05; additive genotypic p = 0.05, OR = 0.76, 95% CI [0.58–1.00]) in The Gambia. Association of rs3212227 was then replicated in African-Americans (rs3212227 allelic p = 0.002; additive genotypic p = 0.05, OR = 0.78, 95% CI [0.61–1.00]); most importantly, in the African-American cohort, multiple significant signals of association (seven of the nine polymorphisms tested) were detected throughout the gene. These data suggest that genetic variation in IL12B, a highly relevant candidate gene, is a risk factor for PTB in populations of African ancestry, although further studies will be required to confirm this association and identify the precise mechanism underlying it

Fuse testing in oil for Alvin batteries

This report includes the test results on a series of test made by the DSRVG to find a more suitable fuse for the ALVIN batteries. Figure 1 gives the test setup. The data on page 1 of 5 is of 100 amp, 250 volt standard commercial buss fuse. This fuse was used in ALVIN for the first shallow water dives. Due to the higher I.R. drop and the high current required to blow this fuse, it was desirable to find and test better fuses. The amp trap form 101, type #4, 250 volt fuse was selected for test because of its size and construction. Test data is found on sheets 2, 3, 4, and 5. Disassembly of the amp trap fuse shows that an insulating material is strapped on both sides of the blowing link. This construction minimizes heat loss to the oil and results in a more consistent blowing value when operated in oil Sheets of #3 and 4 have the last test data run on a 150 and 200 amp fuse, pressurized to 3300 PSIG in Tellus #15 oil manufactured by the Shell Oil Company. This test was run to see if pressurizing had any effect on oil penetration. Data collected and run by M.J. McCamis, W.M. Marquet, Geo. Borderson and D. Mason

Technical progress report : advanced marine technology 1 August 1973 - 31 January 1974

Contrary to the statement in the previous progress report (WHOI-73-92) we have decided to issue the final technical reports on Submerged navigation, Hydraulic Impact Hammer, Deep Sea Rock Drill and the Self Contained Ancillary Modular Package (SCAMP) as separate reports. These are underway in various stages and will be issued as completed. This six months has seen successful use of the navigation system in direct and surface bounce modes, testing of the "lock on" system of SCAMP to an ALVIN model and steady progress in the Modular Acoustic System.Prepared for the Office of naval Research under Contract N00014-71-C-0284; NR 293-008

Technical progress report : advanced marine technology 1 February 1974 - 31 July 1974

The navigation system previously reported on is currently (July 1974) being used by ALVIN in a study of Mid-Atlantic Ridge as part of Project FAMOUS. According to all reports the system is a most important factor in making the project successful so far. Engineering design, construction and testing are the main efforts in the subjects summarized below with more detail later on.Prepared for the Office of Naval Research under Contract N00014-71-C-0284; NR 293-008

Technical progress report : advanced marine technology 1 February 1973 - 31 July 1973

This report covers a period which finds several of the projects nearing completion. It is expected that the next semi-annual report should contain final technical reports on Submerged navigation, Hydraulic Impact Hammer, Deep Sea Rock Drill and the Shelf Contained Ancillary Modular Package (SCAMP). It is possible that extensive testing and use of SCAMP will not take place until next year. The responsibility for these worthwhile equipments then shifts to the users, who in most cases has been intimately involved in the development. The Submerged Navigation system continues to attract much attention both within and without the Institution. Delays in the fitting and testing of ALVIN in the Titanium hull configuration has slowed the field work with ARPA developed equipment bu the next six months should contain considerable work.Prepared for the Office of naval Research under Contract N00014-71-C-0284; NR 293-00