A Comparison of SIR-B Directional Ocean Wave Spectra with Aircraft Scanning Radar Spectra     

Beal RC  Monaldo FM  Tilley DG  Irvine DE  Walsh EJ  Jackson FC  Hancock DW  Hines DE  Swift RN  Gonzalez FL  Lyzenga DR  Zambresky LF 《Science (New York, N.Y.)》1986,232(4757):1531-1535

Directional ocean wave spectra derived from Shuttle Imaging Radar-B (SIR-B) L-band imagery collected off the coast of southern Chile on 11 and 12 October 1984 were compared with independent spectral estimates from two airborne scanning radars. In sea states with significant wave heights ranging from 3 to 5 meters, the SIR-B-derived spectra at 18 degrees and 25 degrees off nadir yielded reasonable estimates of wavelengths, directions, and spectral shapes for all wave systems encountered, including a purely azimuth-traveling system. A SIR-B image intensity variance spectrum containing predominantly range-traveling waves closely resembles an independent aircraft estimate of the slope variance spectrum. The prediction of a U.S. Navy global spectral ocean wave model on 11 October 1984 exhibited no significant bias in dominant wave number but contained a directional bias of about 30 degrees espect to the mean of the aircraft and spacecraft estimates.  相似文献   

Wrong huxley     

Gonzalez NL 《Science (New York, N.Y.)》1981,214(4520):494

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Magnetic storm predictions     

Tsurutani BT  Gonzalez WD 《Science (New York, N.Y.)》1992,256(5054):159

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Metapopulation dynamics, abundance, and distribution in a microecosystem     

A Gonzalez  JH Lawton  FS Gilbert  TM Blackburn  I Evans-Freke 《Science (New York, N.Y.)》1998,281(5385):2045-2047

The experimental fragmentation of landscapes of a natural ecosystem resulted in declines in the abundance and distribution of most species in the multispecies animal community inhabiting the landscapes and the extinction of many species. These declines caused the deterioration of the positive interspecific relation between local population abundance and distributional extent in this community. However, when patches were connected by habitat corridors, an immigration "rescue effect" arrested declines in both abundance and distribution and maintained the observed positive relation between them. These results demonstrate the importance of metapopulation dynamics and landscape connectivity for the persistence of populations in fragmented landscapes.  相似文献   

Reversal learning and forgetting in bird and fish     

R C Gonzalez  E R Behrend  M E Bitterman 《Science (New York, N.Y.)》1967,158(800):519-521

Pigeons and goldfish were trained in red-green discrimination in daily sessions, with the rewarded color changed every 2 days. Improvement in the performance of the pigeons could be traced to decrements in retention from each day to the next. The goldfish showed no improvement and no decrements in retention. The results suggest that progressive improvement in habit reversal is a product of proactive interference, and that the absence of improvement in the fish is due, not to the lack of some higher-order process which operates to produce improvement in higher vertebrates, but to a difference in learning-retention mechanisms.  相似文献   

Seasat synthetic aperture radar: ocean wave detection capabilities   总被引：1，自引：0，他引：1  

Gonzalez FI  Beal RC  Brown WE  Deleonibus PS  Sherman JW  Gower JF  Lichy D  Ross DB  Rufenach CL  Shuchman RA 《Science (New York, N.Y.)》1979,204(4400):1418-1421

A preliminary assessment has been made of the capability of the Seasat synthetic aperture radar to detect ocean waves. Comparison with surface and aircraft measurements from five passes of the satellite over the Gulf of Alaska indicates agreement to within about - 15 percent in wavelength and about +/- 25 degrees in wave direction. These results apply to waves 100 to 250 meters in length propagating in a direction predominantly across the satellite track, in sea states with significant wave height (H((1/3))) in a range of 2 to 3.5 meters.  相似文献   

DNA: uncooked, al dente, or scotti?     

Stasiak A  Dubochet J  Furrer P  Gonzalez O  Maddocks J 《Science (New York, N.Y.)》1999,283(5408):1641

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Adaptation and evolutionary rescue in metapopulations experiencing environmental deterioration     

Bell G  Gonzalez A 《Science (New York, N.Y.)》2011,332(6035):1327-1330

It is not known whether evolution will usually be rapid enough to allow a species to adapt and persist in a deteriorating environment. We tracked the eco-evolutionary dynamics of metapopulations with a laboratory model system of yeast exposed to salt stress. Metapopulations experienced environmental deterioration at three different rates and their component populations were either unconnected or connected by local dispersal or by global dispersal. We found that adaptation was favored by gradual deterioration and local dispersal. After further abrupt deterioration, the frequency of evolutionary rescue depended on both the prior rate of deterioration and the rate of dispersal. Adaptation was surprisingly frequent and rapid in small peripheral populations. Thus, evolutionary dynamics affect both the persistence and the range of a species after environmental deterioration.  相似文献   

Reference intervals of acute phase proteins in healthy Andalusian donkeys and response to experimentally induced endotoxemia     

Alejandro Perez‐Ecija  Antonio Buzon‐Cuevas  Raul Aguilera‐Aguilera  Carlos Gonzalez‐De Cara  Franciso J. Mendoza Garcia 《Journal of veterinary internal medicine / American College of Veterinary Internal Medicine》2021,35(1):580-589

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Microwave-assisted Acid decomposition of animal- and plant-derived samples for element analysis     

Carrilho EN  Gonzalez MH  Nogueira AR  Cruz GM  Nóbrega JA 《Journal of agricultural and food chemistry》2002,50(15):4164-4168

A single microwave-assisted acid-decomposition procedure is proposed for sample preparation of plant- and bovine-derived materials prior to multielement determination by inductively coupled plasma-optical emission spectrometry (ICP-OES). The procedure involved sample grinding in a cryogenic mill to reduce particle sizes and increase the surface area for acid attack, followed by decomposition under high pressure and temperature. A single heating program was employed and efficiently destroyed most of the organic matrix by using small volumes of nitric acid and hydrogen peroxide. Accuracy of the elemental analysis was indicated by the good agreement between certified and found values of elements in plant and animal samples at 95% confidence level. The sample preparation procedure was fast and reproducible, and proved to be efficient for elemental analysis in agricultural and food-related samples by a sensitive multielement technique such as ICP-OES.  相似文献