منابع مشابه
The Struggle for Existence
"It is in the nature of things" is surely, today, just as good an explanation of a biological phenomenon as it ever was; and now, as always, it is singularly unilluminating. That some of the problems to which such an explanation is usually given are susceptible to analysis appears obvious; at least an approach can be made toward segregating the many factors which, acting independently ox throug...
متن کاملStruggle for Existence
The experimental work mentioned in this paper has been supported jointly by grants from The Rockefeller Foundation and the Dr. Wallace C., and Clara A. Abbott Memorial Fund of The University of Chicago. Thomas Park expresses his deep appreciation to the following friends for criticism, constructive suggestions, and advice: Thomas Burnett, Charles Elton F.R.S., A. E. Emerson, P. W. Frank, Don W....
متن کاملScreening for spiritual struggle.
A growing body of research documents the harmful effects of religious or spiritual struggle among patients with a wide variety of diagnoses. We developed a brief screening protocol for use in identifying patients who may be experiencing religious/spiritual struggle, as well as patients who would like a visit from a chaplain. We describe the results of a pilot study in which non-chaplain healthc...
متن کاملA Struggle Against Forgetting
One of the most remarkable characteristics of living organisms is their ability to alter their behavior by learning. Human beings excel at processing new information, retaining it in their memory, and using it to develop new ideas. Studies in the mollusk Aplysia showed that learning involves the strengthening and increased effectiveness of preexisting synapses. Over time, it has become clear th...
متن کاملCompetitive Segmentation: A Struggle for Image Space
In this paper, we propose a competitive image segmentation algorithm. It is a dynamic evolving optimization method, which we call the population algorithm. The method is inspired from nature, where the image segments are a population of entities that struggle for the limited image space and settle territory expansion con icts locally without central authority. Hence, it is a region-based segmen...
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ژورنال
عنوان ژورنال: Nature
سال: 2004
ISSN: 0028-0836,1476-4679
DOI: 10.1038/430834b