Flowering Crabapple Evaluations, 1972-77

Study on relationship between pollen exine ornamentation pattern and germplasm evolution in flowering crabapple

Pollen ornamentation patterns are important in the study of plant genetic evolution and systematic taxonomy. However, they are normally difficult to quantify. Based on observations of pollen exine ornamentation characteristics of 128 flowering crabapple germplasms (44 natural species and 84 varieties), three qualitative variables with binary properties (Xi: regularity of pollen exine ornamentat...

1972 , Volume , Issue Nov-1972

It makes swept insertion and return loss measurements simultaneously, overa wide frequency range. TO THE MICROWAVE ENGINEER, an instru ment that measures insertion and return loss simultaneously, over a broad band, would be as useful as is the voltmeter to other electronic special ists, provided it is made practical in several im portant ways. • Its measurements must really refer to the micro...

Eisenstadt v. Baird (1972)

Prior to 1971, women had some difficulty obtaining contraceptive materials due to a law prohibiting the distribution of contraceptives by anyone other than a registered physician or registered pharmacist. This limited access to contraceptives had an impact on women?s reproductive rights [6] and it was the Supreme Court case Eisenstadt v. Baird (1972) that helped bring the issue into the public ...

Themes from 1972

Although 1972 was the year that Winograd published his now classic natural language Study of the blocks world, that fact had not yet penetrated to the ACL. At that time people with AI computational interests were strictly in a minority in the association and it was a radical move to appoint Roger Schank as program chairman for the year's meeting. That was also the year that we didn't have a pre...

James Norman Davidson, 1911-1972.