Ohio Journal of Science: Volume 74, Issue 4 (July, 1974)

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https://kb.osu.edu/handle/1811/22018

Front Matter
pp. 0
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Alternatives in Science Education
Longbrake, Eleanor pp. 209-213
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The Pre-Illinoian Lake Clays of the Cincinnati Region
Ettensohn, Frank R. pp. 214-226
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Stratigraphy and Pollen Analysis of Yarmouthian Interglacial Deposits in Southeastern Indiana
Kapp, Ronald O.; Gooding, Ansel M. pp. 226-238
Article description | Article Full Text PDF (985KB)

A Five-Year Study of a Hibernating Colony of Myotis Lucifugus
Brenner, Fred J. pp. 239-244
Article description | Article Full Text PDF (386KB)

The Occurrence of the Freshwater Bryozoan Pottsiella Erecta (Potts) 1884 (Gymnolaemata: Paludicellidae) in Lake Erie
Maciorowski, Anthony F. pp. 245-247
Article description | Article Full Text PDF (605KB)

Application of Third-Order Transfer Functions for Edge Enhancement of Signals from Scanned Imaging Systems
Gebel, Radames K. H.; Fettis, Henry E. pp. 248-260
Article description | Article Full Text PDF (622KB)

A New Genus, Ancudana, and a New Species of Chilean Leafhopper Belonging to the Deltocephalinae (Homoptera: Cicadellidae)
DeLong, Dwight M.; Martinson, Candace pp. 261-263
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The Ohio Academy of Science Officers, Committees, and Academy Representatives for 1974-75
pp. 264-265
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Necrology
pp. 266-271
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Book Reviews
pp. 272-272
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Back Matter
pp. 999
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Now showing 1 - 12 of 12

Back Matter
(1974-07)
Book Reviews
(1974-07)
Necrology
(1974-07)
The Ohio Academy of Science Officers, Committees, and Academy Representatives for 1974-75
(1974-07)
A New Genus, Ancudana, and a New Species of Chilean Leafhopper Belonging to the Deltocephalinae (Homoptera: Cicadellidae)
(1974-07) DeLong, Dwight M.; Martinson, Candace
A new genus, Ancudana, and a new species, A. cinctus, collected in Chile, are described.
Application of Third-Order Transfer Functions for Edge Enhancement of Signals from Scanned Imaging Systems
(1974-07) Gebel, Radames K. H.; Fettis, Henry E.
Whenever images are reproduced by the utilization of a time-sequential signal obtained by electron beam scanning or by flying-spot light-scanning of photo-conductive thin-films, etc., onto which an optical image is focused, lack of edge resolution occurs. This is due to a number of intrinsic, uncontrollable factors of the semiconductor, e.g., its finite thickness, finite size of the scanning beam, etc. Such lack of edge resolution makes difficult the determination of the exact configurations of imaged objects. The present paper describes a linear network composed of an operational amplifier arrangement which allows controllable steepening (crispening) of edge resolution even when the peaks of the edges are overemphasized. This is accomplished without causing the post-transient oscillations which conventional devices tend to introduce. The mathematical relationships of the electronic crispening set-up are derived, and transfer functions in the Laplacefrequency-, and time domains are analyzed. The Nyquist diagram of a typical arrangement shows that the system is stable even when it produces, from a unit step input, an output signal with an overshoot of 250%. Further the resulting signal is free of oscillations, in contrast to the second order system which exhibits permanent oscillations when producing an overshoot of only 100%. The phase and amplitude behavior for the second and third order system are compared. It is shown that the phase of the second order system is an increasing function of frequency with a steep slope at the critical value whereas the third order system exhibits a gradually increasing and then decreasing phase. Further, the amplitude response of the second order system rises sharply as resonance is approached, wrhile for the third order system there is a gradual peaking of the amplitude characteristic. The smoothing effect of the system on a signal exhibiting white noise is demonstrated; the out-put signal being virtually free of any noise components.
The Occurrence of the Freshwater Bryozoan Pottsiella Erecta (Potts) 1884 (Gymnolaemata: Paludicellidae) in Lake Erie
(1974-07) Maciorowski, Anthony F.
The collection of Pottsiella erecta in western Lake Erie in August 1972 represents the first reported occurrence of this species in the Great Lakes and a 110 km northward extension of its known range.
A Five-Year Study of a Hibernating Colony of Myotis Lucifugus
(1974-07) Brenner, Fred J.
A hibernating colony of Myolis lucijugus was studied for a five-year period. The members of the colony exhibited movement within the cave system during the winter months. The expectancy of finding a bat present in the cave was approximately two-and-a-half years after banding. The average distance of bats recaptured was 25±5 miles from the banding site.
Stratigraphy and Pollen Analysis of Yarmouthian Interglacial Deposits in Southeastern Indiana
(1974-07) Kapp, Ronald O.; Gooding, Ansel M.
Additional stratigraphic study and pollen analysis of organic units of pre-Illinoian drift in the Handley and Townsend Farms Pleistocene sections in southeastern Indiana have provided new data that change previous interpretations and add details to the history recorded in these sections. Of particular importance is the discovery in the Handley Farm section of pollen of deciduous trees in lake clays beneath Yarmouthian colluvium, indicating that the lake clay unit is also Yarmouthian. The pollen diagram spans a substantial part of Yarmouthian interglacial time, with evidence of early temperate and late temperate vegetational phases. It is the only modern pollen record in North America for this interglacial age. The pollen sequence is characterized by extraordinarily high percentages of Ostrya-Carpinus pollen, along with Quercus, Pinus, and Corylus at the beginning of the record; this is followed by higher proportions of Fagus, Carya, and Ulmus pollen. The sequence, while distinctive from other North American pollen records, bears recognizable similarities to Sangamonian interglacial and postglacial pollen diagrams in the southern Great Lakes region.
The Pre-Illinoian Lake Clays of the Cincinnati Region
(1974-07) Ettensohn, Frank R.
Pre-Illinoian clays have been known in Ohio since 1903 when W. G. Tight described their occurrence in the abandoned Teays River valley in south-central Ohio. Not until 1919 were similar clays noted in the Cincinnati region. These early occurrences were described from the unglaciated portions of northern Kentucky just south of Cincinnati, and their significance was not made clear. Because the clays occurred beyond what was then considered the Illinoian glacial boundary, the clays were called pre-Illinoian.
Alternatives in Science Education
(1974-07) Longbrake, Eleanor
Front Matter
(1974-07)

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