Other Engineering Commons^™

Sulfur Dioxide And Particles In Quiescent Volcanic Plumes From Poás, Arenal, And Colima Volcanos, Costa Rica And Mexico, T. Casadevall, William I. Rose, William H. Fuller, William H. Hunt, Mark A. Hart, Jarvis L. Moyers, David C. Woods, Raymond L. Chuan, James P. Friend

Department of Geological and Mining Engineering and Sciences Publications

Measurements of SO₂ emission rates and concentrations and of particle distribution, size, shape, and composition were made in quiescent volcanic plumes emitted into the troposphere from Poás and Arenal volcanos, Costa Rica, and Colima volcano, Mexico. SO₂ emission rates were 700±180 metric tons per day (t/d) for Poás, 210±30 t/d for Arenal, and 320±50 t/d for Colima. The concentrations of SO₂ calculated from the COSPEC/lidar data were 5–380 ppb. Concentrations of SO₂measured directly by flame photometry were 10–250 ppb. Particles collected in the plumes with a quartz crystal microbalance impactor were mostly less than 3 …

Amatitlan, An Actively Resurging Cauldron 10 Km South Of Guatemala City, Richard L. Wunderman, William I. Rose

Department of Geological and Mining Engineering and Sciences Publications

A 14×16 km diameter collapse caldera has been recognized 10 km south of Guatemala City, Guatemala. The caldera is north of the presently active volcano Pacaya and west of Agua, a large stratovolcano. The caldera was not previously recognized because its eastern and western margins coincide with faults that outline the Guatemala City graben and because the northern margin of the caldera is buried by pyroclastic rocks. The existence of the northern caldera margin is now established by gravity data and a variety of geological observations including circumferential faults, hot springs, well-log data, and lithological changes in sedimentary rocks. A …

The Role Of Molecular Weight In Controlling The Structure And Properties Of High-Speed Melt Spun Nylon-6 Filaments, Jogendra Suryadevara

Masters Theses

A comprehensive study of the structure development during high speed melt spinning of nylon-6 was performed. The major emphasis of the research was on the effect of molecular weight in the structure development of high speed melt spun nylon-6 filaments. The various measurements done on the filaments to determine their morphology included diameter, tensions in spin-line, density as well as x-ray diffraction and birefringence measurements. The effects of mass throughputs were also studied. Tensile properties of conditioned fibers were measured and related to the spinning variables and molecular weight.

The spin-line stresses measured increased rapidly with take-up velocity and molecular …

Spring 1984, Wmpg 90.9 Fm

WMPG Program Guides

WMPG program guide for Spring 1984

Includes notes from Program Director, information on shows and events, and schedule.

Fall 1984, 90.9 Wmpg Fm

WMPG Program Guides

No abstract provided.

Summer 1984, 90.9 Wmpg Fm

WMPG Program Guides

WMPG Program Guide, Summer 1984,

1984 (Season Unknown), 90.9 Wmpg Fm

WMPG Program Guides

Mention of 1984 folk festival in program...