Methods for supplying medical personnel, especially in isolated areas, with the same sophisticated medical information and computational facilities that are available in major medical centers, were investigated. Inexpensive, readily available input/output terminals, including the pushbutton telephone, were tested with several biomedical application programs. An experimental network, consisting of several independent commercial time-sharing computers linked to user terminals through a small communication control computer, was constructed to demonstrate an efficient and flexible approach to remote computer access. The communication control computer, acting as a message handling and translating interface, allowed the use of a uniform terminal control language and common data handling conventions. By linking to the most powerful commercial time-sharing systems available, a reliable medical data processing network was established without a major investment in computer hardware or system software. This experimental work is a major part of the Medical Information Telecommunication Project in the Division of Computer Research and Technology (DCRT) at the National Institutes of Health (NIH).
JSTOR is a not-for-profit service that helps scholars, researchers, and students discover, use, and build upon a wide range of content in a trusted digital archive. We use information technology and tools to increase productivity and facilitate new forms of scholarship. For more information about JSTOR, please contact support@jstor.org. SUMMARY AND CONCLUSIONSTo determine the duration of toxicity for mosquitoes of several DDT residual sprays, 72 houses were sprayed with 4 formulas of DDT spray at the beginning of the "malaria season," on about June 1, and were inspected at 6 different periods until October 1, 1945. Twentyfive unsprayed houses in the same area were inspected at the same time.For the period of the "malaria season," in this region a period of 17 weeks, the once-sprayed houses harbored significantly fewer mosquitoes than the unsprayed houses.Little difference was found in the duration of toxicity of the four formulas of DDT residual spray employed, except for the formula used in the houses in group C, which was statistically less effective 14 weeks after spraying. ACKNOWLEDGMENl[S
Assuming that the red spots period of rotation is 9'" 55"' 37'.o65-which is probably very near the truth-we tinid that in one nminute of time 0'.604 of the surface w%ill pass a given meridian. Multiplying the minutes in the last, or column 7; by) .604, We gtt the followiing tab)le of lengths in longitude on the surface (if Jupiter. Ilhe tirst nine are tatken tr-oii a table ot elenen trantits observedl by imie I)revi)us t) Augulst 30, a IdNI)isklld in En-1,r1t/s .1tft
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