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Journal articles on the topic 'Tuning a marimba bars'

Author: Grafiati

Published: 4 June 2021

Last updated: 14 February 2022

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1

Bretos, J., C. Santamaria, and J. Alonso Moral. "Tuning process of xylophone and marimba bars analyzed by finite element modeling and experimental measurements." Journal of the Acoustical Society of America 102, no. 6 (1997): 3815–16. http://dx.doi.org/10.1121/1.420287.

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2

Suits, B. H. "Basic physics of xylophone and marimba bars." American Journal of Physics 69, no. 7 (2001): 743–50. http://dx.doi.org/10.1119/1.1359520.

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3

Useche, Jorge E., Rafael G. Hurtado, and Federico Demmer. "Interplay between musical practices and tuning in the marimba de chonta music." Journal of New Music Research 48, no. 5 (2019): 479–500. http://dx.doi.org/10.1080/09298215.2019.1667399.

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4

Bork, Ingolf. "Vibration modes and tuning of xylophone bars." Journal of the Acoustical Society of America 85, S1 (1989): S32. http://dx.doi.org/10.1121/1.2026911.

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5

Bork, Ingolf. "Practical tuning of xylophone bars and resonators." Applied Acoustics 46, no. 1 (1995): 103–27. http://dx.doi.org/10.1016/0003-682x(95)93953-f.

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6

Buana, Utari Arsy. "BENTUK PENYAJIAN LAGU OEMAR BAKRIE DI MARCHING BAND SWATAMI PADA GEBYAR PENDIDIKAN NASIONAL KABUPATEN LABUHANBATU UTARA." Grenek Music Journal 7, no. 1 (2018): 92. http://dx.doi.org/10.24114/grenek.v7i1.8790.

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The results showed that one form of emotional expression that is channeledthrough the music and therefore, the group marching band Swatami onarranemen songs Oemar Bakrie brought by Marching band Swatami using threecategories of instrument, namely: instrument Percussion in tone (Glockenspiel,vibraphone, Xylophone, Marimba), brass instruments (trumpet, Mellophone,Baritone, Tuba), and percussion (Senar drum, tenor drum, bass drum, cymbals).Choosing songs Omar bakrie for in the arrangements with the shape Marchingband. Bakrie Oemar tempo songs using 163 has 51 bars and has two variations ofthe mel

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7

Cronin, Beau, Ian H. Stevenson, Mriganka Sur, and Konrad P. Körding. "Hierarchical Bayesian Modeling and Markov Chain Monte Carlo Sampling for Tuning-Curve Analysis." Journal of Neurophysiology 103, no. 1 (2010): 591–602. http://dx.doi.org/10.1152/jn.00379.2009.

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A central theme of systems neuroscience is to characterize the tuning of neural responses to sensory stimuli or the production of movement. Statistically, we often want to estimate the parameters of the tuning curve, such as preferred direction, as well as the associated degree of uncertainty, characterized by error bars. Here we present a new sampling-based, Bayesian method that allows the estimation of tuning-curve parameters, the estimation of error bars, and hypothesis testing. This method also provides a useful way of visualizing which tuning curves are compatible with the recorded data.

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8

Swindale, N. v. "Responses of neurons in cat striate cortex to vernier offsets in reverse contrast stimuli." Visual Neuroscience 12, no. 5 (1995): 805–17. http://dx.doi.org/10.1017/s0952523800009378.

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AbstractThis paper examines how the responses of cells in area 17 of the cat vary as a function of the vernier offset between a bright and a dark bar. The study was prompted by the finding that human vernier acuity is reduced for bars or edges of opposite contrast sign (Mather & Morgan, 1986; O'Shea & Mitchell, 1990). Both simple and complex cells showed V-shaped tuning curves for reverse contrast stimuli: i.e. response was minimum at alignment, and increased with increasing vernier offset. For vernier bars with the same contrast sign, γ-shaped tuning curves were found, as reported ear

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9

Bai, Yuehao, Hung Ho, Guillaume A. Pouliot та Joshua Shea. "Inference for Support Vector Regression under ℓ1 Regularization". AEA Papers and Proceedings 111 (1 травня 2021): 611–15. http://dx.doi.org/10.1257/pandp.20211035.

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We provide large-sample distribution theory for support vector regression (SVR) with l1-norm along with error bars for the SVR regression coefficients. Although a classical Wald confidence interval obtains from our theory, its implementation inherently depends on the choice of a tuning parameter that scales the variance estimate and thus the width of the error bars. We address this shortcoming by further proposing an alternative large-sample inference method based on the inversion of a novel test statistic that displays competitive power properties and does not depend on the choice of a tuning

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10

Mulligan, Kathleen, Jong-Nam Kim, and Helen Sherk. "Simulated Optic Flow and Extrastriate Cortex. II. Responses to Bar Versus Large-Field Stimuli." Journal of Neurophysiology 77, no. 2 (1997): 562–70. http://dx.doi.org/10.1152/jn.1997.77.2.562.

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Mulligan, Kathleen, Jong-Nam Kim, and Helen Sherk. Simulated optic flow and extrastriate cortex. II. Responses to bar versus large-field stimuli. J. Neurophysiol. 77: 562–570, 1997. In the preceding paper we described the responses of cells in the cat's lateral suprasylvian visual area (LS) to large-field optic flow and texture movies. To assess response properties such as direction selectivity, cells were also tested with moving bar stimuli. We expected that there would be good agreement between response properties elicited with optic flow movies and those revealed with bar stimuli. We first

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11

LIU, Xiliang, Shaomin FENG, Xin WANG, et al. "Tuning the mechanical properties and degradation properties of polydioxanone isothermal annealing." TURKISH JOURNAL OF CHEMISTRY 44, no. 5 (2020): 1430–44. http://dx.doi.org/10.3906/kim-2006-55.

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Polydioxanone (PPDO) is synthesized by ring-opening polymerization of p-dioxanone, using stannous octoate as the catalyst. The polarized optical micrograph (POM) shows thes pherulite growth rate of PPDO decreases with an increase in the isothermal crystallization temperature. PPDO is compression-molded into bars, and PPDO bars are subjected to isothermal annealing at a range of temperatures (Ta = 50, 60, 70, 80, 90, and 100 °C), and correspond to three different annealing times (ta = 1h, 2h, 3h). The effect on PPDO is investigated by using differential scanning calorimetry (DSC), thermogravime

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12

Chen, Yuzhi, Yunjiu Wang, and Ning Qian. "Modeling V1 Disparity Tuning to Time-Varying Stimuli." Journal of Neurophysiology 86, no. 1 (2001): 143–55. http://dx.doi.org/10.1152/jn.2001.86.1.143.

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Most models of disparity selectivity consider only the spatial properties of binocular cells. However, the temporal response is an integral component of real neurons' activities, and time-varying stimuli are often used in the experiments of disparity tuning. To understand the temporal dimension of V1 disparity representation, we incorporate a specific temporal response function into the disparity energy model and demonstrate that the binocular interaction of complex cells is separable into a Gabor disparity function and a positive time function. We then investigate how the model simple and com

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13

CHU, BAOJIN, WENYI ZHU, MINGJIN CHU, NAN LI, and L. ERIC CROSS. "TUNING THE RESONANT FREQUENCIES OF FLEXURE MODE FLEXOELECTRIC PIEZOELECTRIC COMPOSITES." Journal of Advanced Dielectrics 01, no. 01 (2011): 53–56. http://dx.doi.org/10.1142/s2010135x11000069.

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The newly developed flexure mode flexoelectric composites have extremely high direct piezoelectric response around mechanical resonant frequency. Methods of tuning the resonant frequencies of the composites were studied in this paper. The resonant frequencies can be adjusted by changing dimensions of ferroelectric ceramic bars in the composites or by adding an additional mass on the composites. Design of flexure mode composites with multiple resonant frequencies was also studied.

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14

Brancheriau, Loïc, Henri Baillères, and Christian Sales. "Acoustic resonance of xylophone bars: experimental and analytic approaches of frequency shift phenomenon during the tuning operation of xylophone bars." Wood Science and Technology 40, no. 2 (2005): 94–106. http://dx.doi.org/10.1007/s00226-005-0011-3.

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15

Yau, Jeffrey M., Charles E. Connor, and Steven S. Hsiao. "Representation of tactile curvature in macaque somatosensory area 2." Journal of Neurophysiology 109, no. 12 (2013): 2999–3012. http://dx.doi.org/10.1152/jn.00804.2012.

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Tactile shape information is elaborated in a cortical hierarchy spanning primary (SI) and secondary somatosensory cortex (SII). Indeed, SI neurons in areas 3b and 1 encode simple contour features such as small oriented bars and edges, whereas higher order SII neurons represent large curved contour features such as angles and arcs. However, neural coding of these contour features has not been systematically characterized in area 2, the most caudal SI subdivision in the postcentral gyrus. In the present study, we analyzed area 2 neural responses to embossed oriented bars and curved contour fragm

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16

Danilov, Yuri, Rodney J. Moore, Von R. King, and Peter D. Spear. "Are neurons in cat posteromedial lateral suprasylvian visual cortex orientation sensitive? Tests with bars and gratings." Visual Neuroscience 12, no. 1 (1995): 141–51. http://dx.doi.org/10.1017/s0952523800007379.

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AbstractThere is controversy in the literature concerning whether or not neurons in the cat's posteromedial lateral suprasylvian (PMLS) visual cortex are orientation selective. Previous studies that have tested cells with simple bar stimuli have found that few, if any, PMLS cells are orientation selective. Conversely, studies that have used repetitive stimuli such as gratings have found that most or all PMLS cells are orientation selective. It is not known whether this difference in results is due to the stimuli used or the laboratories using them. The present experiments were designed to answ

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17

Hegdé, Jay, and David C. Van Essen. "Stimulus Dependence of Disparity Coding in Primate Visual Area V4." Journal of Neurophysiology 93, no. 1 (2005): 620–26. http://dx.doi.org/10.1152/jn.00039.2004.

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Disparity tuning in visual cortex has been shown using a variety of stimulus types that contain stereoscopic depth cues. It is not known whether different stimuli yield similar disparity tuning curves. We studied whether cells in visual area V4 of the macaque show similar disparity tuning profiles when the same set of disparity values were tested using bars or dynamic random dot stereograms, which are among the most commonly used stimuli for this purpose. In a majority of V4 cells (61%), the shape of the disparity tuning profile differed significantly for the two stimulus types. The two sets o

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18

Soares, Filipe, José Antunes, and Vincent Debut. "Multi-modal tuning of vibrating bars with simplified undercuts using an evolutionary optimization algorithm." Applied Acoustics 173 (February 2021): 107704. http://dx.doi.org/10.1016/j.apacoust.2020.107704.

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19

Xu, Tao, and Yu-Sheng Lin. "Tunable Terahertz Metamaterial Using an Electric Split-Ring Resonator with Polarization-Sensitive Characteristic." Applied Sciences 10, no. 13 (2020): 4660. http://dx.doi.org/10.3390/app10134660.

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We present a tunable terahertz (THz) metamaterial using an electric split-ring resonator (eSRR), which exhibits polarization-sensitive characteristics. The proposed eSRR is composed of double symmetrical semicircles and two central metal bars. By changing the lengths of two metal bars, the electromagnetic responses can be tuned and switched between dual-band and triple-band resonances in transverse magnetic (TM) mode. Furthermore, by moving the bottom metal bar to change the gap between the two metal bars, the first resonance is stable at 0.39 THz, and the second resonance is gradually blue-sh

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20

Olavarria, J. F., E. A. DeYoe, J. J. Knierim, J. M. Fox, and D. C. van Essen. "Neural responses to visual texture patterns in middle temporal area of the macaque monkey." Journal of Neurophysiology 68, no. 1 (1992): 164–81. http://dx.doi.org/10.1152/jn.1992.68.1.164.

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1. We studied how neurons in the middle temporal visual area (MT) of anesthetized macaque monkeys responded to textured and nontextured visual stimuli. Stimuli contained a central rectangular ,figure- that was either uniform in luminance or consisted of an array of oriented line segments. The figure moved at constant velocity in one of four orthogonal directions. The region surrounding the figure was either uniform in luminance or contained a texture array (whose elements were identical or orthogonal in orientation to those of the figure), and it either was stationary or moved along with the f

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21

O'Malley, D. M., and R. H. Masland. "Responses of the starburst amacrine cells to moving stimuli." Journal of Neurophysiology 69, no. 3 (1993): 730–38. http://dx.doi.org/10.1152/jn.1993.69.3.730.

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1. Rabbit retinas were isolated from the eye and incubated in the presence of 3H-choline. Samples of retina taken from a defined midperipheral eccentricity were spread over the domed end of a fiberoptic bundle that formed the floor of a superfusion chamber. The rate of release of labeled acetylcholine by the starburst amacrine cells was studied. 2. When the retina was stimulated by moving gratings, the cells vigorously increased their secretion of acetylcholine. Responses were observed when the bars were as small as 60 microns in width. Systematically varying the spatial and temporal frequency

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22

Ortiz, E., J. F. Valdés-Galicia, A. Hurtado, et al. "Neutron and gamma-ray fluxes measured by SciCRT prototype at the top of Sierra Negra volcano, Mexico." Revista Mexicana de Física 65, no. 5 Sept-Oct (2019): 545. http://dx.doi.org/10.31349/revmexfis.65.545.

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The mini-SciCR is a cosmic ray detector, it is made of scintillator bars with a total volume of 20 x 20 x 20.8 $cm^{3}$. The array of scintillator bars act both as a target and as a tracker of the incident radiation. In this paper we describe the method developed with the help of a Monte Carlo simulation to distiguish the neutron signals from gamma ray signals, it is based on the different maximum energy deposited at a scintillator bar by neutrons and gamma rays. To distiguish the neutral emission signals (neutrons and gamma rays) from charged particles signals, we implemented via software a s

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23

Marfurt, K. J., and R. L. Kirlin. "Narrow‐band spectral analysis and thin‐bed tuning." GEOPHYSICS 66, no. 4 (2001): 1274–83. http://dx.doi.org/10.1190/1.1487075.

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Running window seismic spectral decomposition has proven to be a very powerful tool in analyzing difficult‐to‐delineate thin‐bed tuning effects associated with variable‐thickness sand channels, fans, and bars along an interpreted seismic horizon or time slice. Unfortunately, direct application of spectral decomposition to a large 3‐D data set can result in a rather unwieldy 4‐D cube of data. We develop a suite of new seismic attributes that reduces the input 20–60 running window spectral components down to a workable subset that allows us to quickly map thin‐bed tuning effects in three dimensi

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24

Volgushev, M., T. R. Vidyasagar, and Xing Pei. "Dynamics of the orientation tuning of postsynaptic potentials in the cat visual cortex." Visual Neuroscience 12, no. 4 (1995): 621–28. http://dx.doi.org/10.1017/s0952523800008919.

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AbstractWe evaluated the dynamic aspects of the orientation tuning of the input to cat visual cortical neurons by analyzing the postsynaptic potentials (PSPs) evoked by flashing bars of light. The PSPs were recorded using in vivo whole-cell technique, and we analyzed the orientation tuning during subsequent temporal windows after stimulus onset and offset. Our results show that the amplitudes of the postsynaptic potential are reliably tuned to orientation and matching that of the spike responses only during certain temporal windows. During the first 100 ms after stimulus presentation, orientat

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25

Martinez-Conde, Susana, Javier Cudeiro, Kenneth L. Grieve, Rosa Rodriguez, Casto Rivadulla, and Carlos Acuña. "Effects of Feedback Projections From Area 18 Layers 2/3 to Area 17 Layers 2/3 in the Cat Visual Cortex." Journal of Neurophysiology 82, no. 5 (1999): 2667–75. http://dx.doi.org/10.1152/jn.1999.82.5.2667.

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In the absence of a direct geniculate input, area 17 cells in the cat are nevertheless able to respond to visual stimuli because of feedback connections from area 18. Anatomic studies have shown that, in the cat visual cortex, layer 5 of area 18 projects to layer 5 of area 17, and layers 2/3 of area 18 project to layers 2/3 of area 17. What is the specific role of these connections? Previous studies have examined the effect of area 18 layer 5 blockade on cells in area 17 layer 5. Here we examine whether the feedback connections from layers 2/3 of area 18 influence the orientation tuning and ve

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26

Fallah, M., and B. Moetakef-Imani. "Analytical Prediction of Stability Lobes for Passively Damped Boring Bars." Journal of Mechanics 33, no. 5 (2017): 641–54. http://dx.doi.org/10.1017/jmech.2017.22.

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AbstractThe present article proposes the closed-form solution for analytical prediction of stability lobes in internal turning process. The passively damped boring bar is modeled as a cantilevered Euler-Bernoulli beam with constant cross sectional properties in which a Tuned Mass Damper (TMD) is embedded for the purpose of chatter suppression. The non-dimensional equations of motion are derived, assuming that the boring bar dynamics is well-represented by the fundamental mode of vibration. The stability of equivalent two-DOF dynamic model, i.e. boring bar with TMD, is analyzed in frequency dom

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Thompson, Kirk G., Audie G. Leventhal, Yifeng Zhou, and Dan Liu. "Stimulus dependence of orientation and direction sensitivity of cat LGNd relay cells without cortical inputs: A comparison with area 17 cells." Visual Neuroscience 11, no. 5 (1994): 939–51. http://dx.doi.org/10.1017/s0952523800003898.

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AbstractThe cortical contribution to the orientation and direction sensitivity of LGNd relay cells was investigated by recording the responses of relay cells to drifting sinusoidal gratings of varying spatial frequencies, moving bars, and moving spots in cats in which the visual cortex (areas 17, 18, 19, and LS) was ablated. For comparison, the spatial-frequency dependence of orientation and direction tuning of striate cortical cells was investigated employing the same quantitative techniques used to test LGNd cells. There are no significant differences in the orientation and direction tuning

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Chen, Chien-Hung, Yi-Fang Lin, and Hua-Ming Chen. "Research on U-shaped tuning stub RFID tag on different objects." International Journal of Microwave and Wireless Technologies 7, no. 6 (2014): 629–36. http://dx.doi.org/10.1017/s1759078714001135.

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A new ultra-high frequency radio frequency identification (RFID) tag antenna, which is comprised a U-shaped tuning stub and a dipole radiator for different permittivity surfaces is investigated, fabricated, and measured. For a conjugate match to the NXP G2XM chip impedance of 29–j137 at 915 MHz, a dipole tag antenna with U-shaped stubconnected to dipole arms was designed. Simple size adjustments of the U-shaped tuning stub and dipole radiator of the antenna allow for easy control of the antenna resistance and inductive reactance, from which the chip impedance requirement may be readily satisfi

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29

Maldonado, Pedro E., and Charles M. Gray. "Heterogeneity in local distributions of orientation-selective neurons in the cat primary visual cortex." Visual Neuroscience 13, no. 3 (1996): 509–16. http://dx.doi.org/10.1017/s095252380000818x.

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AbstractWe have employed the tetrode technique, which allows accurate discrimination of individual neuronal spike trains from multiunit recordings, in order to examine the variation of orientation selectivity among local groups of neurons. We recorded a total of 321 cells from 62 sites in area 17 of halothane-anesthetized cats; each site contained between three to ten neurons that were estimated to be less than 65 μm away from the tetrode tip. For each cell, we determined the orientation tuning in response to moving bars. Of the cells tested, 8.4% were unresponsive, 22.7% had no preferential r

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30

Lagae, L., S. Raiguel, and G. A. Orban. "Speed and direction selectivity of macaque middle temporal neurons." Journal of Neurophysiology 69, no. 1 (1993): 19–39. http://dx.doi.org/10.1152/jn.1993.69.1.19.

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1. We tested quantitatively the responses of 147 middle temporal (MT) cells to light and dark bars moving at different speeds ranging over a 1,000-fold range (0.5–512 deg/s). 2. We derived the following quantities from the speed-response (SR) curves obtained for opposite directions of motion. Speed selectivity was characterized by the maximum response, optimum speed, upper cutoff speed, response to slow movement, and tuning width. Direction selectivity was characterized by the direction index (DI) averaged over speeds yielding significant responses (MDI) and by the direction index at optimal s

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31

Swindale, N. V., and M. S. Cynader. "Vernier acuities of neurons in area 17 of cat visual cortex: Their relation to stimulus length and velocity, orientation selectivity, and receptive-field structure." Visual Neuroscience 2, no. 2 (1989): 165–76. http://dx.doi.org/10.1017/s0952523800012025.

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AbstractThe sensitivity of neurons in area 17 of the cat's visual cortex to vernier offset was expressed as the percentage reduction in response caused by the introduction of a given offset into a bar stimulus moving across the receptive field. There was a wide variation in sensitivity: in some cells response could be halved by an offset equal to a fifth of receptive-field width (defined as twice the standard deviation of a Gaussian curve fitted to the response profile), while other cells showed no sensitivity. The highest absolute sensitivities of complex and simple cells were similar, althou

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Humphrey, Allen L., and Alan B. Saul. "Strobe Rearing Reduces Direction Selectivity in Area 17 by Altering Spatiotemporal Receptive-Field Structure." Journal of Neurophysiology 80, no. 6 (1998): 2991–3004. http://dx.doi.org/10.1152/jn.1998.80.6.2991.

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Humphrey, Allen L. and Alan B. Saul. Strobe rearing reduces direction selectivity in area 17 by altering spatiotemporal receptive-field structure. J. Neurophysiol. 80: 2991–3004, 1998. Direction selectivity in simple cells of cat area 17 is linked to spatiotemporal (S-T) receptive-field structure. S-T inseparable receptive fields display gradients of response timing across the receptive field that confer a preferred direction of motion. Receptive fields that are not direction selective lack gradients; they are S-T separable, displaying uniform timing across the field. Here we further examine t

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Laurikainen, E., H. Salo, R. Buta, and J. H. Knapen. "Overview of the Near-IR S0 Galaxy Survey (NIRS0S)." Advances in Astronomy 2011 (2011): 1–17. http://dx.doi.org/10.1155/2011/516739.

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An overview of the results of the near-IR S0 galaxy survey (NIRS0S) is presented. NIRS0S is a magnitude- (mB⩽12.5 mag) and inclination- (<65∘) limited sample of ̃200 nearby galaxies, mainly S0s, but includes also Sa and E galaxies. It uses deepKs-band images, typically reaching a surface brightness of 23.5 mag arcsec−2. Detailed visual and photometric classifications were made, for the first time coding also the lenses in a systematic manner. As a comparison sample, a similar sized spiral galaxy sample with similar image quality was used. Based on our analysis, the Hubble sequence was revis

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Bush, Paul, and Nicholas Priebe. "GABAergic Inhibitory Control of the Transient and Sustained Components of Orientation Selectivity in a Model Microcolumn in Layer 4 of Cat Visual Cortex." Neural Computation 10, no. 4 (1998): 855–67. http://dx.doi.org/10.1162/089976698300017520.

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Recently proposed models of orientation tuning in layer 4 of cat primary visual cortex (Somers, Nelson, & Sur, 1995; Douglas, Koch, Mahowald, Martin, & Suarez, 1995) rely on widespread inhibitory intracortical connections to suppress the nonoptimal component of a broadly tuned thalamic input, while local excitatory intracortical connections amplify the optimal component. However, new experimental data (Ferster, Chung, & Wheat, 1996) and theoretical analyses (Ferster, 1987; Krukowski, Priebe, & Miller, 1996) show that the temporally modulated component of thalamic input is well

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Bareišis, Jonas, Danas Garuckas, Alvydas A. Mikulskas, and Danguolė Striukienė. "STRAINS AND STRESSES OF THREE—LAYER COMPOSITE BARS AND BEAMS/TRISLUOKSNIŲ KOMPOZITINIŲ STRYPŲ IR SIJŲ DEFORMACIJOS BEI ĮTEMPIMAI." JOURNAL OF CIVIL ENGINEERING AND MANAGEMENT 3, no. 10 (1997): 5–11. http://dx.doi.org/10.3846/13921525.1997.10531677.

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New composite anisotropic materials (CM) glass, carbon and boric plastics are more and more frequently used in engineering construction. By tuning strength and stiffness characteristics of CM under tension or bending with their density or price it is possible to get laminated construction of maximum strength and stiffness and minimum mass or price. The purpose of this work is to analyse regularity of distribution of stiffness or strains and stresses in three-layer bars, subjected to tension or bending by changing geometric characteristics of layer, materials and their position in cross-section

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Durand, Jean-Baptiste, Pascal Girard, Pascal Barone, Jean Bullier, and Lionel G. Nowak. "Effects of contrast and contrast adaptation on static receptive field features in macaque area V1." Journal of Neurophysiology 108, no. 7 (2012): 2033–50. http://dx.doi.org/10.1152/jn.00936.2011.

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The spatiotemporal features of the “static” receptive field (RF), as revealed with flashing bars or spots, determine other RF properties. We examined how some of these static RF features vary with contrast and contrast adaptation in area V1 of the anesthetized macaque monkey. RFs were mapped with light and dark flashing bars presented at three different contrasts, with the low and medium contrasts eliciting approximately 1/3 and 2/3 of the high-contrast response amplitude. The main results are as follows: 1) RF widths decreased when contrast decreased; however, the amount of decrease was less

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Wang, Zhiguo, Jinghuai Gao, Xiaolan Lei, Xiaojie Cui, and Daxing Wang. "Application of 3D seismic attributes to optimize the placement of horizontal wells within a tight gas sand reservoir, Ordos Basin, China." GEOPHYSICS 81, no. 3 (2016): B77—B86. http://dx.doi.org/10.1190/geo2015-0244.1.

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The Lower Permian Xiashihezi Formation in the Ordos Basin, China, is a quartz-sandstone reservoir with low porosity and low permeability. We have acquired 3D seismic data and well data from 18 vertical and four horizontal wells to indicate the potential of seismic attribute analyses in locating seismic sweet spots for lateral placement of horizontal wells. Using the analytic wavelet transform with a Morse wavelet, the integration of high tuning spectral components, high sweetness and high spectral attenuation helped us to estimate the distribution of gas-bearing tight sands in the Xiashihezi F

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Roberts, M. J., W. Zinke, K. Guo, R. Robertson, J. S. McDonald, and A. Thiele. "Acetylcholine Dynamically Controls Spatial Integration in Marmoset Primary Visual Cortex." Journal of Neurophysiology 93, no. 4 (2005): 2062–72. http://dx.doi.org/10.1152/jn.00911.2004.

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Recent in vitro studies have shown that acetylcholine (ACh) selectively reduces the efficacy of lateral cortical connections via a muscarinic mechanism, while boosting the efficacy of thalamocortical/feed-forward connections via a nicotinic mechanism. This suggests that high levels of ACh should reduce center-surround interactions of neurons in primary visual cortex, making cells more reliant on feed-forward information. In line with this hypothesis, we show that local iontophoretic application of ACh in primate primary visual cortex reduced the extent of spatial integration, assessed by recor

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Conway, Bevil R., and Margaret S. Livingstone. "Space-Time Maps and Two-Bar Interactions of Different Classes of Direction-Selective Cells in Macaque V-1." Journal of Neurophysiology 89, no. 5 (2003): 2726–42. http://dx.doi.org/10.1152/jn.00550.2002.

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We used one-dimensional sparse noise stimuli to generate first-order spatiotemporal maps and second-order two-bar interaction maps for 65 simple and 124 complex direction-selective cells in alert macaque V1. Spatial and temporal phase differences between light and dark space-time maps clearly distinguished simple and complex cell populations. Complex cells usually showed similar direction preferences to light and dark bars, but many of the directional simple cells were much more direction selective to one sign of contrast than the reverse. We show that this is predicted by a simple energy mode

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La Cara, Giuseppe-Emiliano, and Mauro Ursino. "Direction selectivity of simple cells in the primary visual cortex: Comparison of two alternative mathematical models. II: Velocity tuning and response to moving bars." Computers in Biology and Medicine 37, no. 5 (2007): 598–610. http://dx.doi.org/10.1016/j.compbiomed.2006.05.007.

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Pasupathy, Anitha, and Charles E. Connor. "Responses to Contour Features in Macaque Area V4." Journal of Neurophysiology 82, no. 5 (1999): 2490–502. http://dx.doi.org/10.1152/jn.1999.82.5.2490.

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The ventral pathway in visual cortex is responsible for the perception of shape. Area V4 is an important intermediate stage in this pathway, and provides the major input to the final stages in inferotemporal cortex. The role of V4 in processing shape information is not yet clear. We studied V4 responses to contour features (angles and curves), which many theorists have proposed as intermediate shape primitives. We used a large parametric set of contour features to test the responses of 152 V4 cells in two awake macaque monkeys. Most cells responded better to contour features than to edges or b

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Toda, Shinji, and Ross S. Stein. "Long- and Short-Term Stress Interaction of the 2019 Ridgecrest Sequence and Coulomb-Based Earthquake Forecasts." Bulletin of the Seismological Society of America 110, no. 4 (2020): 1765–80. http://dx.doi.org/10.1785/0120200169.

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Abstract We first explore a series of retrospective earthquake interactions in southern California. We find that the four Mw≥7 shocks in the past 150 yr brought the Ridgecrest fault ∼1 bar closer to failure. Examining the 34 hr time span between the Mw 6.4 and Mw 7.1 events, we calculate that the Mw 6.4 event brought the hypocentral region of the Mw 7.1 earthquake 0.7 bars closer to failure, with the Mw 7.1 event relieving most of the surrounding stress that was imparted by the first. We also find that the Mw 6.4 cross-fault aftershocks shut down when they fell under the stress shadow of the M

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Morrone, M. C., M. Di Stefano, and D. C. Burr. "Spatial and temporal properties of neurons of the lateral suprasylvian cortex of the cat." Journal of Neurophysiology 56, no. 4 (1986): 969–86. http://dx.doi.org/10.1152/jn.1986.56.4.969.

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Neurons in the posteromedial lateral suprasylvian cortex (PMLS) of cats were recorded extracellularly to investigate their response to stimulation by bars and by sinusoidal gratings. Two general types of cells were identified: those that modulated in synchrony with the passage of drifting bars and gratings and those that responded with an unmodulated increase in discharge. Both types responded to contrast reversed gratings with a modulation of activity: the cells that modulated to drifting gratings modulated to the first harmonic of contrast reversed gratings (at appropriate spatial phase and

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Chen, Haitao, Mingkai Liu, Lei Xu, and Dragomir N. Neshev. "Valley-selective directional emission from a transition-metal dichalcogenide monolayer mediated by a plasmonic nanoantenna." Beilstein Journal of Nanotechnology 9 (March 2, 2018): 780–88. http://dx.doi.org/10.3762/bjnano.9.71.

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Background: Two-dimensional (2D) transition-metal dichalcogenides (TMDCs) with intrinsically crystal inversion-symmetry breaking have shown many advanced optical properties. In particular, the valley polarization in 2D TMDCs that can be addressed optically has inspired new physical phenomena and great potential applications in valleytronics. Results: Here, we propose a TMDC–nanoantenna system that could effectively enhance and direct emission from the two valleys in TMDCs into diametrically opposite directions. By mimicking the emission from each valley of the monolayer of WSe2 as a chiral poi

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Kananen, Markku, Mikko Hietala, and Kari Mäntyjärvi. "Rapid Manufacturing of Shaped Die and Draw Punch Tools for Presses." Key Engineering Materials 554-557 (June 2013): 1814–18. http://dx.doi.org/10.4028/www.scientific.net/kem.554-557.1814.

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Traditionally forming tools for a press are machined with a CNC-machine. This is quite time consuming - calculating tool tracks, selecting cutting tools, cutting blanks, design fixation and finally machining - especially for a small batch of parts. One alternative method is to cut a die and a draw punch tools from a blank sheet and bunching the plates. Clamping plates together is fast and easy to implement by using for example studs and bars with a certain tolerance to ensure alignment. A laser, a water jet or a plasma cutter can be used for cutting plates. Especially the laser and the water j

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PALMER, LARRY A., and JOHN S. NAFZIGER. "Effects of surround motion on receptive-field gain and structure in area 17 of the cat." Visual Neuroscience 19, no. 3 (2002): 335–53. http://dx.doi.org/10.1017/s0952523802192108.

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Modulation of responses elicited by moving bars within the classical receptive fields (CRF) of cat area 17 neurons were studied as a function of the direction and velocity of drifting gratings in the surrounds. Several different types of modulation were observed; collectively, the responses of most cells, both simple and complex, were strongly modulated by surround motion. None of these cells appear to signal relative velocity between the CRF and its surround. The gain and spatiotemporal structure of the CRF mechanism were estimated using contrast-response functions and reverse correlation wit

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Duysens, J., G. A. Orban, and J. Cremieux. "Velocity selectivity in the cat visual system. II. Independence from interactions between different loci." Journal of Neurophysiology 54, no. 4 (1985): 1050–67. http://dx.doi.org/10.1152/jn.1985.54.4.1050.

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To investigate the dependence of velocity characteristics on spatiotemporal interactions the velocity selectivity of 15 geniculate and 72 cortical cells (areas 17 and 18) was examined with light and dark bars before and after masking all but the most sensitive part of the receptive field. The use of a 0.3 degree window proved effective in eliminating enough spatiotemporal interactions to abolish cortical direction selectivity. The same window improved the responsiveness at high velocities in only 26% of the cortical cells preferring low velocities and having a receptive field with nonoverlappi

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Repp, Bruno H. "Effects of Auditory Feedback Deprivation on Expressive Piano Performance." Music Perception 16, no. 4 (1999): 409–38. http://dx.doi.org/10.2307/40285802.

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Previous studies have suggested that elimination of auditory feedback has no significant effect on the accuracy of keyboard performance. In the present study, this issue was investigated further by focusing specifically on parameters of expression in piano performance: horizontal and vertical timing, horizontal and vertical dynamics, and pedaling. Six pianists performed a short musical excerpt (bars 1-5 of Chopin's Etude in E Major, op. 10, no. 3) 10 times on a digital piano in each of four conditions: expressive with and without feedback, and metronomic with and without feedback. The data ana

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Talebi, Vargha, and Curtis L. Baker. "Categorically distinct types of receptive fields in early visual cortex." Journal of Neurophysiology 115, no. 5 (2016): 2556–76. http://dx.doi.org/10.1152/jn.00659.2015.

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In the visual cortex, distinct types of neurons have been identified based on cellular morphology, response to injected current, or expression of specific markers, but neurophysiological studies have revealed visual receptive field (RF) properties that appear to be on a continuum, with only two generally recognized classes: simple and complex. Most previous studies have characterized visual responses of neurons using stereotyped stimuli such as bars, gratings, or white noise and simple system identification approaches (e.g., reverse correlation). Here we estimate visual RF models of cortical n

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Balena, Matteo, Giacomo Mantriota, and Giulio Reina. "Dynamic Handling Characterization and Set-Up Optimization for a Formula SAE Race Car via Multi-Body Simulation." Machines 9, no. 6 (2021): 126. http://dx.doi.org/10.3390/machines9060126.

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There is a growing interest towards multi-body modelling and simulation that play a critical role in the development and testing of new mechanical systems, in general, and formula cars specifically to avoid expensive and time-consuming experimental track testing. Recent advances in computer-aided engineering packages, allows one not only to evaluate the basic properties that define the dynamic behavior of a newly-designed formula car, but as well as to investigate the impact on the performance of the many adjustable parameters that collectively are referred to as the car set-up. Therefore, by

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