|
|
Creator | Title | Description | Subject | Date |
26 |
|
Coley, Phyllis D. | Intraspecific variation in herbivory on two tropical tree species | Levels of herbivory on young and mature leaves were determined for two tree species, Trichilia cipo (Meliaceae) and Cecropia insignis (Moraceae), in a lowland rain forest of Panama. Saplings of both species were studied in light gaps, and in addition, Trichilia was studied in the understory. | Cecropia insignis; Trichilia cipo; Herbivory; Intraspecific variation; Panama; Temporal distribution; Treefall gaps; Tropical forest; Understory | 1983 |
27 |
|
Lindstrom, Gary E. | The key node method: a highly-parallel alpha-beta algorithm | A new parallel formulation of the alpha-beta algorithm for minimax game tree searching is presented. Its chief characteristic is incremental information sharing among subsearch processes in the form of "provisional" node value communication. Such "eager" communication can offer the double benefit of... | Key node method; Alpha-beta algorithm; Minimax; Game tree searching | 1983 |
28 |
|
Battin, Margaret P. | Least worst death: selective refusal of treatment | In recent years "right-to-die" movements have brought into the public consciousness something most physicians have long known: that in some hopeless medical conditions, heroic efforts to extend life may no longer be humane, and the physician must be prepared to allow the patient to die. Physician re... | Death; Dying; Right to die; Natural death | 1983 |
29 |
|
Bastiani, Michael | Loss of axons in the cat optic nerve following fetal unilateral enucleation: an electron microscopic analysis | Between the 48th day of gestation (E-48) and maturity, the number of axons in the cat optic nerve is reduced by approximately 50%. On the basis of an electron microscopic assay, the axon population of the E-48 nerve was estimated to be 328,000. In contrast, estimates from two normal adults were 159,... | Ganglion cell death; Retinofugal projection; Retinal ganglion cell axons | 1983 |
30 |
|
Brown, Francis Harold | The lower Omo basin | The boundaries of the Lower Omo Basin have been mapped by Fuchs (1939) and by Butzer (1970, 1971) in a general way. The structural features and physiography of the eastern and central part of the Lower Omo Basin are best expressed on the maps of Davidson et al. (1973). Walsh and Dodson (1969) have m... | | 1983 |
31 |
|
Warner, Homer R. | Medical Data Acquisition Using an Intelligent Machine | Biomedical Informatics | | 1983 |
32 |
|
Blair, David F. | Metal centers of cytochrome c oxidase: structures and interactions | Studies directed toward the elucidation of the structures of the metal centers in cytochrome c oxidase are reviewed. Progress towards an understanding of the interactions between these centers and their spatial distributions within the protein will also be presented. Our studies are based primarily... | | 1983 |
33 |
|
Horch, Kenneth W.; Tuckett, Robert P.; Burgess, Paul Richard | Neural signal for skin indentation depth. I. Changing indentations | Psychophysical tests on human subjects showed that judgments of skin indentation depth made when the fingertip was indented at rates from 0.2 to 16 mm/set were quite insensitive to changes in indentation velocity. Similar results were obtained on the forearm at indentation velocities of 0.4 to 16... | Skin; Indentation; Nerve impulses | 1983 |
34 |
|
Horch, Kenneth W.; Tuckett, Robert P.; Burgess, Paul Richard | Neural signal for skin indentation depth. II. Steady indentations | The glabrous skin of the monkey's hand was stimulated with a waveform that indented the skin at a rate of 0.4 mm/set, held the skin steadily or nearly steadily indented for 12 set or longer, and then retracted back to the starting position. Recordings were made of activity in single afferent fibe... | Skin; Indentation; Nerve impulses | 1983 |
35 |
|
Frederick, Jeanne M. | Neurotransmitter properties of the newborn human retina. | Human retinal tissue from a newborn was examined autoradiographically for the presence of highaffinity uptake and localization of the following putative neurotransmitters: dopamine, glycine, GAB A, aspartate, and glutamate. In addition, the dopamine content of this newborn retina was measured by ... | Newborn; Human Retina; Neurotransmitter Properties; Photoreceptors | 1983 |
36 |
|
Miller, Joel Steven; Epstein, Arthur J. | Noise in highly correlated commensurate charge transfer salts | We present the results of a study of the frequency (f) dependent noise power for commensurate charge transer salts with strong coulomb repulsion. f-1 noise is observed with increasing currents. Excess f-1 noise is measured for samples which were chemically doped to form solitons. Frequency indepe... | Noise power; Charge-transfer salts | 1983 |
37 |
|
Sperry, John S. | Observations on the structure and function of hydathodes in Blechnum lehmanii | The fronds of many ferns in the Polypodiaceae (Ogura, 1972) and Cyatheaceae (Weiler, cited in Lippmann, 1925) possess swollen vein endings associated with specialized adaxial epidermal cells. Their structure is similar in all ferns (Gardiner, 1883; Potonie, 1892; Poirault, 1893; Goebel, 1930; Gutten... | Hydathodes; Blechnum lehmannii; Root pressure; Secretion | 1983 |
38 |
|
Flynn, John J. | Old wine in new bottles: some observations about current monopolization litigation | Lawyers seldom have the luxury of speaking in generalities. The particulars of the cases and the client's problems we deal with usually limit our immediate concerns and thinking to the facts at hand. Facts, unlike the generalities law professors are allowed to dispense in the classroom or the unrea... | Lawyers; Assumptions; Analysis | 1983 |
39 |
|
Cashdan, Elizabeth A. | On territoriality in hunter-gatherers | Cashdan's intention of using an evolutionary framework to examine cross-cultural variations in territorial defense is admirable, but her argument about the applicability of available models, her own model, and the data used to support it (CA 24:47-66) are all severely flawed. Specifically, Cashdan ... | Defense; Organisms; Behavior | 1983 |
40 |
|
Mathews, V. John | On using the short-time unbiased spectrum estimation algorithm for estimating time delays and magnitude squared coherence functions | This paper introduces novel applications of the short-time unbiased sprectral estimation (STUSE) algorithm, which adds biased estimates to yield unbiased spectral estimates. It is shown that STUSE algorithm is an effective tool for estimating time delays and magnitude-squared coherence (MSC) functio... | | 1983 |
41 |
|
Pershing, David W.; Slaughter, David Michael | Parameters influencing the evolution and oxidation of sulfur in suspension phase coal combustion | Stoker coal-fired boiler furnaces are significant in terms of coal consumption and environmental impact; however, they have received relatively little research attention. This paper describes the results of a two-year study on the formation of sulfur oxides in the suspension phase of a coal-fired s... | Stoker coal-fired furnaces | 1983 |
42 |
|
Bastiani, Michael | Pathfinding by neuronal growth cones in grasshopper embryos I. Divergent choices made by the growth cones of sibling neurons | We are interested in how the growth cones of identified neurons navigate in the central nervous system of the grasshopper embryo. The behavior of identified growth cones was observed as a function of developmental time by (i) periodically removing embryos from synchronized clutches of eggs and (i... | Neuropil; Axonal; Cell | 1983 |
43 |
|
Bastiani, Michael | Pathfinding by neuronal growth cones in grasshopper embryos: II. Selective fasciculation onto specific axonal pathways | In the previous paper (Raper, J. A., M. Bastiani, and C. S. Goodman (1983) J. Neurosci. 3: 20-30) we showed that the growth cones of two sibling neurons, the G and C cells, follow the same route in the developing grasshopper neuropil until they reach a stereotypic choice point. Here their growth con... | Neurons; Axons; Neuropil | 1983 |
44 |
|
Henderson, Thomas C. | Pattern recognition in a multi-sensor environment | Current pattern recognition systems tend to operate on a single sensor, e.g., a camera. however. the need is now evident for pattern recognition systems which can operate in multi-sensor environments. For example, a robotics workstation may use range finders. cameras, tactile pads, etc. The Multi-se... | Pattern recognition; Multi-sensor; Multi-sensor Kernel System; MKS | 1983 |
45 |
|
Vardeny, Zeev Valentine | Photoinduced IR active vibrations in trans-(CD)x: a three-mode system | In a recent Letter Blanchet et al.? have extended photoinduced absorption measurements of frYms-polyacetylene to lower energy than obtained before 2 for both isotopes, (CH)x and (CD)X. While in (CE)X three strong ir-active vibrations (IRAV) are photoinduced, only two IRAV were observed in (CD)X, at... | Photoinduced absorption; IR active vibrations | 1983 |
46 |
|
Vardeny, Zeev Valentine | Picosecond trapping of photocarriers in amorphous silicon | Trapping of photoexcited carriers in the picosecond and subnanosecond time domains was studied by measuring the decay of photoinduced absorption (PA) in a-Si, a-Si:F, a-Si:H, and a-Si:H:F. We found that when the midgap density of states decreases, both the trapping time and its temperature dependenc... | Photocarriers; Amorphous silicon; Picosecond trapping; Photoinduced absorption | 1983 |
47 |
|
Olivera, Baldomero M. | Poly(ADP-ribosylation) of a DNA topoisomerase | A DNA topoisomerase activity, copurifying with poly(ADP-ribose) synthetase from calf thymus, >95% inhibited if extensive poly(ADP-ribosylation) is allowed to occur. The inhibited DNA topoisomerase, which has drastically different elution properties on hydroxylapatite, can be reactivated by mild alka... | Nicotinic acid; ADP-ribosylation; Turnover cycle; Synthetases | 1983 |
48 |
|
Gardner, Reed M. | Pulmonary Function Laboratory - Personnel Qualifications | Biomedical Informatics | | 1983 |
49 |
|
Gardner, Reed M. | Pulmonary Function Testing in the Office, in the Clinic, and in Group Screening | Biomedical Informatics | | 1983 |
50 |
|
Flynn, John J. | Reaganomics and antitrust enforcement: a jurisprudential critique | There are few judges, psychoanalysts or economists today who do not begin a consideration of their typical problems with some formula designed to cause all moral problems to disappear and to produce an issue purified for the procedure of positive empirical science. But the ideals have generally reti... | Ethics; Morality; Antitrust Law | 1983 |