Showing papers by "San Francisco State University published in 1982"
TL;DR: The fossil record of the Morel Ascocarp is dominated by two types of Carboniferous strata, the Morchella Esculenta and the Tournaisian Formation, which are related to each other and have different evolutionary histories.
Abstract: (1982). Notes on the Development of the Morel Ascocarp: Morchella Esculenta. Mycologia: Vol. 74, No. 1, pp. 142-144.
104 citations
TL;DR: In this paper, how companies measure the Productivity of engineers and scientists is discussed, and the authors propose a methodology for measuring the productivity of engineers. But this method is not suitable for all engineers.
Abstract: (1982). How Companies Measure the Productivity of Engineers and Scientists. Research Management: Vol. 25, No. 3, pp. 10-18.
58 citations
TL;DR: The results suggest that endogenous cholesterol production is a necessary but not sufficient factor co-ordinated with mitogen-induced DNA synthesis, and that the presence of some additional product of mevalonate metabolism is involved also.
57 citations
TL;DR: In this paper, X-ray observations of the galaxy M87 and of a region in the Virgo cluster displaced 7 minutes from the center of M87 were obtained with the slid state spectrometer onboard the Einstein Observatory.
Abstract: X-ray observations of the galaxy M87 and of a region in the Virgo cluster displaced 7 minutes from the center of M87 are presented. X-ray spectra are obtained at these two locations with the slid state spectrometer onboard the Einstein Observatory. Emission lines were observed in both locations, indicating the presence of heavy elements at abundances approximately solar (to within a factor of 2). A temperature gradient, T increases from approximately 1.4 keV at the position of M87 to T approximately 3.35 keV 7' away, was detected. There is lower temperature thermal emission at the center of M87 with T approximately 0.6 keV, consistent with models for cooling flows in this cluster. In addition to the thermal emission, a power law component in the spectrum of M87, was detected consistent with that observed by HEAO-1, indicating that this component probably originates in the galaxy itself. The presence of intracluster gas having density approximately .001 cu cm and temperature approximately 30 million K is indicated.
48 citations
TL;DR: Sediments held at constant temperature evolve heat at rates that can be measured by direct calorimetry, and total heat flux is an indication of the rate of degradation of potential chemical energy originally fixed by photosynthesis and represents benthic energy flow.
Abstract: Sediments held at constant temperature evolve heat at rates that can be measured by direct calorimetry. The heat production rates decrease with depth from the surface layer. Total heat flux is an indication of the rate of degradation of potential chemical energy originally fixed by photosynthesis and represents benthic energy flow.
37 citations
TL;DR: In this article, the authors compare the conditions for the general error optimality of linear systems developed by Kalman with conditions for feasibility of linear models of neuromuscular and physiological control systems and show that there are no simple relationships between the two sets of conditions.
34 citations
TL;DR: The animals showed continued motivation for hunting despite the fact that there was no deprivation and the crickets represented an insignificant part of the diet, and any active opportunity to produce a change in their environment was rewarding to the otters.
Abstract: Asian small-clawed river otters (Aonyx cinerea) were given the opportunity to hunt for and capture live crickets (Acheta domestica) in a public interactive display. The otters learned the experimental routine during the first day of exposure. Different response levels were recorded at each of three capture sites, A, B, and C. The animals showed continued motivation for hunting despite the fact that there was no deprivation and the crickets represented an insignificant part of the diet. Besides live crickets, other items—cat food, dead crickets, and gelatin capsules—were introduced for five days each. The otters made the most captures per opportunity for live crickets, followed, in order of preference, by dead crickets, cat food, and gelatin capsules. Although gelatin capsules were found to be the least motivating prey item, the otters hunted for them whenever they were offered. Thus, any active opportunity to produce a change in their environment was rewarding to the otters.
31 citations
01 Jan 1982
TL;DR: In the marine environment, the succession observed in containers is a miniature and typically an accelerated version of the succession commonly observed in the marine environments as mentioned in this paper. But this is not applicable to the terrestrial environment, where the water column integrity and prevent further mixing with the surrounding water is compromised.
Abstract: Enclosing a parcel of water in an experimental container gives that water column integrity and prevents further mixing with the surrounding water. Assuming that nutrients are adequate and that the container is kept in the light, a phytoplankton bloom will develop and a succession of phytoplankton species will follow. The succession observed in containers is a miniature and typically an accelerated version of the succession commonly observed in the marine environment.
30 citations
TL;DR: The transference of leadership from health education facilitators to indigenous elderly leaders within the hotels is examined, as are some of the strategies employed in increasing Project visibility, preventing burn-out, and facilitating replication in other areas.
Abstract: The Tenderloin Senior Outreach Project (TSOP) is presented as a case study of effective community-based organizing among the isolated elderly in one of America's large “grey ghettos.” Based on the ...
27 citations
22 citations
TL;DR: In this article, solid state carbon-13 NMR spectra of metal carbonyls were obtained using commercial instrumentation and the observed isotropic chemical shifts were in good agreement with solution values.
TL;DR: It is concluded that both biochanin A and ferulic acid exert inhibiting influences on the reproductive behavior of Coturnix.
Abstract: A study was conducted to determine the effects of two dietary compounds, biochanin A and ferulic acid, on the reproductive performance of Japanese quail, Coturnix coturnix . These compounds may be present in the diet of wild birds during dry years or at the end of the growing season during normal years. Four treatment groups, each fed a diet supplemented with biochanin A or ferulic acid, and a control group were tested for morphological and behavioral effects before, during and after treatment. Fertility and hatchability data were collected during treatment only. Ferulic acid was shown to inhibit male copulatory behavior during treatment. Biochanin A inhibited male copulatory behavior during and after treatment. Neither drug affected female copulatory behavior though egg-laying was inhibited by the low dose of biochanin A. Ferulic acid significantly reduced the hatchability of eggs. Biochanin A increased the fertility of males and the hatchability of eggs fertilized by them. A correlation between results of this study and natural conditions of reproduction is discussed. It is concluded that both biochanin A and ferulic acid exert inhibiting influences on the reproductive behavior of Coturnix .
01 Jul 1982-International Journal of Human-computer Studies \/ International Journal of Man-machine Studies
TL;DR: TRIP is a system for animating various time—rate—distance problems that employs interactive, high-resolution graphics to present the written problem along with relevant pictures that students use to construct a representative diagram that becomes an animated simulation in which travellers, clocks and odometers are all set into related motion.
Abstract: TRIP is a system for animating various time—rate—distance problems. It employs interactive, high-resolution graphics to present the written problem along with relevant pictures (places, travellers, speedometers, odometers, clocks) that students use to construct a representative diagram. They then guess the answer, “run” the problem, and watch the diagram become an animated simulation in which travellers, clocks and odometers are all set into related motion. The final values of the distances and times for each traveller are stored in a table from which students induce algebraic expressions. TRIP was written in Smalltalk-76 and pilot-tested on an experimental personal computer (a Xerox Alto) at San Francisco State University.
TL;DR: Extrapolation of the Fourier spectrum of an object of finite extent is treated as an algebraic restoration problem and simulation results for 1-D objects are presented.
Abstract: Extrapolation of the Fourier spectrum of an object of finite extent is treated as an algebraic restoration problem. Available samples of the spectrum or the image are modeled as arising due to a matrix transformation of the vector representing the object or the extrapolated part of the spectrum. A singular value decomposition of the matrix transformation is used to obtain a minimum norm estimate for the object. Simulation results for 1-D objects are presented.
TL;DR: The NachNaff scale as mentioned in this paper is a 30-item questionnaire that requires examinees to choose between self-descriptions consistent with either need for achievement (n Ach) or need for affiliation (n Aff).
Abstract: The NachNaff scale is a 30-item questionnaire that requires examinees to choose between self-descriptions consistent with either need for achievement (n Ach) or need for affiliation (n Aff). This s...
TL;DR: Neoirieone, a dibrominated diterpenoid of a new skeletal class related to the irieol Diterpenoids, has been isolated from Laurencia cf. irieii and its structure was elucidated by x-ray crystallographic analysis of its corresponding reduction product.
TL;DR: IGD in all three types of teeth of the small TG series was considerably higher than had been predicted on the basis of bright sunshine availability; but the discrepancy is readily explainable in terms of this population's dietary, which relied on barley as the main staple.
Abstract: Thin ground sections of first molars (M1), third molars (M3), and second premolars (P2) were scanned by light microscopy for relative amounts of interglobular dentine (IGD) in the top half of the crown. Two well-dated cemetery series of English provenance were sampled: the Saint Bride's Church collection (SB) from eighteenth century London, for which the sex, age, and calendar year at death of each individual are known; and the early Anglo-Saxons from Abingdon (A-AS), near Oxford. A lesser number of prehispanic aboriginal Guanche teeth from Tenerife (TG) were also studied. Estimates of insolation in the past were developed indirectly by reference to delta 0(18) mass spectrometer analyses of dated layers of the Greenland ice sheet. In the M1 and M3 of the SB and the A-AS populations, IGD varied as an inverse linear function of average annual hours of bright sunshine below a certain critical level, the insolation deficit threshold being significantly higher and IGD formation faster in the M1 than in the M3. No such dose-response gradient was apparent in the P2 data, presumably because the calcification of this tooth during the fourth year of life coincides with serious pediatric illnesses and weaning of the child onto cereal foods rich in phytate, which together confound and overwhelm the insolation deficit effect. IGD in all three types of teeth of the small TG series was considerably higher than had been predicted on the basis of bright sunshine availability; but the discrepancy is readily explainable in terms of this population's dietary, which relied on barley as the main staple.
TL;DR: The Lome Convention signed in 1975 between the European Economic Community (EEC) and 46 African, Caribbean and Pacific (ACP) States, was hailed as a model for a New International Economic Order as mentioned in this paper.
TL;DR: It was found that Ni2+ bound more strongly to the purine 5′-nucleotides than to the respective nucleosides and bases, and a role for metal-ion-n nucleotide types of complexes is suggested in the processes that might have given rise to the origin of life.
Abstract: The interactions of Ni(II) cation with a representative suite of purine bases and the respective nucleosides and nucleotides have been studied by ultraviolet difference spectroscopy. Apparent association constants were determined for each system at pH 7.0, using computer linear regression coupled with an iteration technique. The specificity of binding of Ni(2+) for the purine nucleotides studied at pH 7.0 was 5-prime-GMP greater than 5-prime-AMP; a similar ordering was also found for the respective nucleosides and bases. In this study binding was not observed for the suite of pyramidines used, although an Ni(2+) -cytidine complex has been observed (Fiskin and Beer, 1965). It was also found that Ni(2+) bound more strongly to the purine 5-prime-nucleotides than to the respective nucleosides and bases. These trends are explained in terms of metal-ligand bonds and available bonding positions on the ligands. A role for metal-ion-nucleotide types of complexes is suggested in the processes that might have given rise to the origin of life.
TL;DR: The technique of direct calorimetry has been used to monitor the metabolic activity of the polychaete, Neanthes virens, an organism commonly used for testing the toxic effects of chemicals in the marine environment, which showed unpredictable alternating periods of hyperactivity and rest when deprived of sediment.
Journal Article•
TL;DR: Sera from psoriatic subjects are less chemotactic for monocytes than normal; this does not appear to be secondary to excess inhibitors for the chemoattractants, ZAS and bacterial factor.
TL;DR: Fluoresceinated alpha‐bungarotoxin (α‐BT) and the Pestronk‐Drachman neuromuscular stain were combined to demonstrate the acetylcholine receptor, the junctional acetylCholinesterase, and the nerve terminal on the same endplate.
Abstract: Fluoresceinated alpha-bungarotoxin (α-BT) and the Pestronk-Drachman neuromuscular stain were combined to demonstrate the acetylcholine receptor, the junctional acetylcholinesterase, and the nerve terminal on the same endplate. The method is reliable and rapid. Synapses in both normal muscle and muscle affected by amyotrophic lateral sclerosis (ALS) are equally well displayed.
TL;DR: In this article, the authors proposed that the expansion and contraction of the circumpolar vortex is a primary control of rainfall trends on the margins of the subtropical deserts, rather than variations in the longitudinal position of troughs and ridges in the upper air westerlies.
TL;DR: In this article, two instructional programs are discussed which extend the use of stimulus fading procedures to the area of sensory assessment with severely and profoundly handicapped students, where the goal of the program is to establish a reliable operant response to an auditory cue so that previously untestable students can participate in formal audiological assessment.
TL;DR: Each native molecule of Artemia hemoglobins contains two polypeptides, which may be represented as αα, αβ and ββ, respectively, which are likely to be biochemically identical.
Abstract: 1. 1. The globin subunits of three Artemia hemoglobins (Hb-1, Hb-2 and Hb-X) have been resolved by electrophoresis in polacrylamide gels containing 5% acetic acid, 8 M urea and 0.5% Triton X-100. 2. 2. Hemoglobins of two semispecies of Artemia were isolated on non-denaturing gels in Tris-glycinate buffer. Aliquots of each hemoglobin were then rerun on the Triton-acid-urea gels. 3. 3. Hb-2 contains equal amounts of two electrophoretically distinct subunits: α and β. 4. 4. Hb-1 contains one or more polypeptides with mobility identical to that of the α subunit. Hb-X contains one or more polypeptides with mobility identical to that of the β subunit. 5. 5. Because the bands of Hb-2 always matched the mobility of the bands in Hb-1 and Hb-X from the same shrimp (in shrimps with different α and β alleles), it is probable that bands with identical mobility are biochemically identical. 6. 6. Moens & Kondo (1978), Eur. J. Biochem. 82 , 65–72, concluded that each native molecule contains two polypeptides. We may therefore represent Hb-1, Hb-2 and Hb-X as: αα, αβ and ββ, respectively.