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  • strongly
  • Consistent with the predictions of the model, the stimuli activated low and high spatial frequency domains differently: at low stimulus drift speeds, both domains were strongly activated, but activity fell off in high spatial frequency domains as drift speed increased. (jneurosci.org)
  • neural activity
  • In the monocular case they found that as a bar was moved across the visual field so that it crossed the blind spot there was a sudden change in neural activity in the deep layers of the neurons in the blind spot area of V1. (wikibooks.org)
  • When the bar was moved across the same part of the visual field of the contralateral eye the neural activity in the blind spot area increased steadily as the bar was moved. (wikibooks.org)
  • star
  • 897R, doi:10.1051/0004-6361:20020943 Scholz, G. (1978), "Spectroscopic investigations of the magnetic AP star HD 9996", Astronomische Nachrichten, 299 (2): 81-85, Bibcode:1978AN. (wikipedia.org)
  • The secondary is a main sequence star with a class in the range A8-F0 V. One of the pair is an active RS Canum Venaticorum type variable star, which is causing the net brightness to vary with a period that matches the orbital period of the binary. (wikipedia.org)
  • Because of the low rate of flare activity, it is thought to be a magnetically evolved star. (wikipedia.org)
  • The periodic pulsations of this star actually cause the stellar class to vary between (F6.5-G2)Ib over the course of each cycle. (wikipedia.org)
  • The radius of the star varies by 4.59 × 106 km (0.007 R☉) over the course of a pulsation cycle. (wikipedia.org)
  • correlation
  • This has allowed several extensive literature reviews and meta-analyses to be produced, which have found no correlation between the lunar cycle and human biology or behavior. (wikipedia.org)
  • A study into epilepsy found a significant negative correlation between the mean number of seizures per day and the fraction of the Moon that is illuminated, but this correlation disappeared when the local clarity of the night sky was controlled for, suggesting that it is the brightness of the night sky, and not the lunar phase per se, that influences the occurrence of epileptic seizures with advanced photosensitive epilepsy. (wikipedia.org)
  • cortical
  • These results suggest that the distributed activity of primary visual cortex can be predicted from cortical maps like those of orientation and SF preference generated using simple, sinusoidal stimuli, and that dynamic visual acuity is degraded at or before the level of area 17. (jneurosci.org)
  • imaged activity in cortical orientation domains in response to drifting complex images (textures composed of bars) and found that the orientations in a stimulus were not sufficient to determine how domains are activated. (jneurosci.org)
  • long-term
  • The authors used a blend of seven recent reconstructions of Northern Hemisphere temperature over the past millennium to test the effects of long-term changes in brightness. (eurekalert.org)
  • In acidic solutions (pH 2.5), CoMnO x exhibits the OER activity of electrodeposited Co oxide (CoO x ) with a Tafel slope of 70-80 mV per decade while also retaining the long-term acid stability of MnO x films for OER at 0.1 mA cm −2 . (rsc.org)
  • By screening potential-pH diagrams, we replaced Mn with Pb to prepare CoFePbO x films that maintained the high OER activity of CoO x at pH 2.5 while exhibiting long-term acid stability at higher current densities (at 1 mA cm −2 for over 50 h at pH 2.0). (rsc.org)
  • days
  • Claims of a lunar connection have appeared in the following contexts: It is widely believed that the Moon has a relationship with fertility due to the corresponding human menstrual cycle, which averages 28 days. (wikipedia.org)
  • This methodology has been criticized, and the statistical significance of the results disappears if one compares day 29 of the lunar cycle (full Moon) to days 9, 12, 13, or 27 of the lunar cycle, which all have an almost equal number of hospital admissions. (wikipedia.org)
  • In the Dresden Codex, the Maya included an almanac showing Venus's full cycle, in five sets of 584 days each (approximately eight years), after which the patterns repeated (since Venus has a synodic period of 583.92 days). (wikipedia.org)
  • occur
  • 188 Checkpoints occur at several different times during the cell cycle to check that the DNA content of the cell has not been damaged or altered. (retzepti.ru)
  • visual
  • Perceptual "filling in" occurs when visual properties such as textures, colours, brightness or motion are extended in the visual field to areas where they do not have corresponding events in the world. (wikibooks.org)
  • In exemplary embodiments, neural or neuromuscular activity is analyzed to determine a focus or other quality of a visual input, and this focus or quality information used as a basis for controlling an adjustable lens system. (google.com)
  • optical
  • An optical instrument monitors PCR replication of DNA in a reaction apparatus having a temperature cycled block with vials of reaction ingredients including dye that fluoresces in presence of double-stranded DNA. (google.com)
  • Earth
  • The term lunar effect refers to real or imaginary correlations between specific stages of the roughly 29.5-day lunar cycle and behavior and physiological changes in living beings on Earth, including humans. (wikipedia.org)
  • We now demonstrate a rational approach for the design of earth-abundant catalysts that are stable and active in acid by treating activity and stability as decoupled elements of mixed metal oxides. (rsc.org)
  • Under these acidic conditions, CoFePbO x exhibits OER activity that approaches noble metal oxides, thus establishing the viability of decoupling functionality in mixed metal catalysts for designing active, acid-stable, and earth-abundant OER catalysts. (rsc.org)
  • types
  • The linear filter model performed well, predicting the different activity patterns observed in response to two types of complex stimuli moving at a variety of speeds. (jneurosci.org)
  • light
  • One measure of this activity is log R′HK, where R′HK is the ratio of the equivalent width of a star's singly-ionized Calcium H and K lines, after correction for photospheric light, to the bolometric flux. (wikipedia.org)
  • Sunlight is a key factor in photosynthesis, the process used by plants and other autotrophic organisms to convert light energy, normally from the Sun, into chemical energy that can be used to fuel the organisms' activities. (wikipedia.org)
  • Despite the involvement of eyes for detecting light and the CNS for controlling chromatophore activity in cephalopods, several studies suggest that chromatophores might also be controlled locally by the peripheral nervous system. (biologists.org)
  • Dopamine is a light-adaptive signal in the retina, causing uncoupling of photoreceptors via D4 receptors (D4R), which inhibit adenylyl cyclase (AC) and reduce PKA activity. (jneurosci.org)
  • what is the shape of the light curve (symmetrical or not, angular or smoothly varying, does each cycle have only one or more than one minima, etcetera)? (wikipedia.org)
  • influence
  • In other cases, such as the approximately-monthly cycle of menstruation in humans (but not other mammals), the coincidence in timing reflects no known lunar influence. (wikipedia.org)
  • Analysis of 564,039 births (1997 to 2001) in North Carolina showed no predictable influence of the lunar cycle on deliveries or complications. (wikipedia.org)
  • In the three decades following 1978, the combination of solar and volcanic activity is estimated to have had a slight cooling influence. (wikipedia.org)
  • properties
  • To determine whether the filter model quantitatively predicted the activity patterns, we measured the spatiotemporal tuning properties of the functional domains in vivo and calculated expected response amplitudes from the model. (jneurosci.org)
  • length
  • However, no connection between lunar rhythms and menstrual onset has been conclusively shown to exist, and the similarity in length between the two cycles is most likely coincidental. (wikipedia.org)
  • human
  • 2015). By damming river systems, reducing hydrologic connectivity by draining wetlands, converting prairies for agriculture, and developing urban centers, human activity continues to have pervasive impacts on ecosystems (Foley et al. (ecologyandsociety.org)
  • test
  • To test this model, we imaged the pattern of activity within cat area 17 in response to stimuli composed of multiple spatial frequencies. (jneurosci.org)
  • Here we test whether the linear filter model also predicts activity patterns within SF domains. (jneurosci.org)
  • year
  • Records of 11,961 live births and 8,142 natural births (not induced by drugs or cesarean section) over a 4-year period (1974-1978) at the UCLA hospital did not correlate in any way with the cycle of lunar phases. (wikipedia.org)
  • recent
  • Recent attempts to realize acid-stable systems from non-critical metals (such as Mn) suffer from low OER activity. (rsc.org)