Remote sensing of aquatic plants

Various sensors were tested in terms of their ability to detect and discriminate among noxious aquatic macrophytes. A survey of researchers currently studying the problem and a brief summary of their work is included. Results indicated that the sensor types best suited to assessment of the aquatic environment are color, color infrared, and black-and-white infrared film, which furnish consistently high contrasts between aquatic plants and their surroundings

Post-operative cranial pressure monitoring system

System for monitoring of fluidic pressures in cranial cavity uses a miniaturized pressure sensing transducer, combined with suitable amplification means, a meter with scale calibrated in terms of pressures between minus 100 and plus 900 millimeters of water, and a miniaturized chart recorder covering similar range of pressures

Development of a recycle fuel for the HTGR

A Weak-Acid Resin-derived (WAR) kernel has been selected as the new reference recycle fuel, and the irradiation program reoriented toward establishing optimum specifications. The loaded resin is carbonized to a dispersion of UO$sub 2$ in carbon at about 1200$sup 0$C. Continued heating to higher temperatures can convert the UO$sub 2$ to carbide, completely at 1800$sup 0$C. Performance of WAR fuels at three levels of conversion is compared. 5 references (auth

Pennsylvania Folklife Vol. 18, No. 3

• The End of the Horse and Buggy Era • Moravian Architecture and Town Planning: A Review • Humor in a Friendly World • Chickens and Chicken Houses in Rural Pennsylvania • Eighteenth-Century Emigrants to America from the Duchy of Zweibrucken and the Germersheim District • Horse-Drawn Transportation: Folk-Cultural Questionnaire No. 11https://digitalcommons.ursinus.edu/pafolklifemag/1035/thumbnail.jp

Studies of molecular properties of polymeric materials: Aerospace environmental effects on three linear polymers

The development of crystal handling techniques for reflection infrared spectroscopy and methods for the fabrication and testing of tensile specimens are discussed. Data from mechanical, ac and dc electrical, and electron paramagnetic resonance studies conducted to determine the effects of 0.1-MeV and 1.0-MeV electron radiation on Mylar, Kapton, Ultem, and metal-doped Ultem are presented. Total doses ranging from 1 X 10 to the 8 rads to 1 X 10 to the 10 rads and dose rates from 5 X 10 to the 7 rads/hr to 1 X 10 to the 9 rads/hr were employed. The results of a study on the effects of aircraft service-environment fluids on Ultem are also reported. The weights and mechanical properties of Ultem were evaluated before and after exposure to water, JP4, Skydrol, an antifreeze, and a paint stripper

Pennsylvania Folklife Vol. 11, No. 2

• Walter Ellsworth Boyer (1911-1960) • The Meaning of Human Figures in Pennsylvania Dutch Folk Art • Meadow Irrigation in Pennsylvania • Receipt Books-New and Old • Pennsylvania Cave and Ground Cellars • The Amish in Their One-Room Schoolhouses • Collectaneahttps://digitalcommons.ursinus.edu/pafolklifemag/1007/thumbnail.jp

Summer 1970

The U.S. Nitrogen Industry by George C. Sweeney, Jr. (page 3) Learn the Oil Alphabet by Melvin E. Long (7) Weed Control with Repeated Applications of Tordon Herbicides by John W. Gibson (9) Plants Speed Formation of Soil by Brij L. Sawney (12) St. Augustine Decline (SAD) A Virus Disease of St. Augustine Grass by Norman L. McCoy, Robert W. Toler, and Jose Amador (15) The Problem of Responsibility for Recreation by Ronald F. Paige (19) Editorial (20) Massachusetts Fine Turf Conference (23) Dickinson Memorial Fund (23

A procedure for the change point problem in parametric models based on phi-divergence test-statistics

This paper studies the change point problem for a general parametric, univariate or multivariate family of distributions. An information theoretic procedure is developed which is based on general divergence measures for testing the hypothesis of the existence of a change. For comparing the accuracy of the new test-statistic a simulation study is performed for the special case of a univariate discrete model. Finally, the procedure proposed in this paper is illustrated through a classical change-point example

SDSS J092455.87+021924.9: an Interesting Gravitationally Lensed Quasar from the Sloan Digital Sky Survey

We report the discovery of a new gravitationally lensed quasar from the Sloan Digital Sky Survey, SDSS J092455.87+021924.9 (SDSS J0924+0219). This object was selected from among known SDSS quasars by an algorithm that was designed to select another known SDSS lensed quasar (SDSS 1226-0006A,B). Five separate components, three of which are unresolved, are identified in photometric follow-up observations obtained with the Magellan Consortium's 6.5m Walter Baade telescope at Las Campanas Observatory. Two of the unresolved components (designated A and B) are confirmed to be quasars with z=1.524; the velocity difference is less than 100 km sec^{-1} according to spectra taken with the W. M. Keck Observatory's Keck II telescope on Mauna Kea. A third stellar component, designated C, has the colors of a quasar with redshift similar to components A and B. The maximum separation of the point sources is 1.78". The other two sources, designated G and D, are resolved. Component G appears to be the best candidate for the lensing galaxy. Although component D is near the expected position of the fourth lensed component in a four image lens system, its properties are not consistent with being the image of a quasar at z~1.5. Nevertheless, the identical redshifts of components A and B and the presence of component C strongly suggest that this object is a gravitational lens. Our observations support the idea that a foreground object reddens the fourth lensed component and that another unmodeled effect (such as micro- or milli-lensing) demagnificates it, but we cannot rule out the possibility that SDSS0924+0219 is an example of the relatively rare class of ``three component'' lens systems.Comment: 24 pages, 6 figures, accepted by A