메뉴 건너뛰기




Volumn 40, Issue 4, 2000, Pages 431-444

Spatial frequency tuned covariance channels for red-green and luminance- modulated gratings: Psychophysical data from human infants

Author keywords

Color vision; Contrast sensitivity; Covariance structure analysis; Factor analysis; Individual differences; Spatial frequency; Spatial vision; Visual development

Indexed keywords

AGE; ARTICLE; CHILD BEHAVIOR; COLOR VISION; CONTRAST SENSITIVITY; CONTROLLED STUDY; COVARIANCE; HUMAN; HUMAN EXPERIMENT; INFANT; LUMINANCE; NORMAL HUMAN; PRIORITY JOURNAL; PSYCHOPHYSICS; SPATIAL FREQUENCY DISCRIMINATION; TASK PERFORMANCE; VISUAL THRESHOLD;

EID: 0033988709     PISSN: 00426989     EISSN: None     Source Type: Journal    
DOI: 10.1016/S0042-6989(99)00188-1     Document Type: Article
Times cited : (19)

References (65)
  • 1
    • 0027425111 scopus 로고
    • Does chromatic sensitivity develop more slowly than luminance sensitivity?
    • Allen D., Banks M.S., Norcia A.M. Does chromatic sensitivity develop more slowly than luminance sensitivity? Vision Research. 33:1993;2553-2562.
    • (1993) Vision Research , vol.33 , pp. 2553-2562
    • Allen, D.1    Banks, M.S.2    Norcia, A.M.3
  • 2
    • 0002369299 scopus 로고
    • Front-end limitations to infant spatial vision: Examination of two analyses
    • K. Simons. Oxford: Oxford University Press
    • Banks M.S., Crowell J.A. Front-end limitations to infant spatial vision: examination of two analyses. Simons K. Early Visual Development. 1993;91-116 Oxford University Press, Oxford.
    • (1993) Early Visual Development , pp. 91-116
    • Banks, M.S.1    Crowell, J.A.2
  • 5
    • 0030034640 scopus 로고    scopus 로고
    • Evidence of spatial and temporal channels in the correlational structure of human spatiotemporal contrast sensitivity
    • Billock V.A., Harding T.H. Evidence of spatial and temporal channels in the correlational structure of human spatiotemporal contrast sensitivity. Journal of Physiology. 490:1996;509-517.
    • (1996) Journal of Physiology , vol.490 , pp. 509-517
    • Billock, V.A.1    Harding, T.H.2
  • 6
    • 0023910163 scopus 로고
    • Orientation and spatial frequency selectivity of adaptation to color and luminance gratings
    • Bradley A., Switkes E., De Valois K.K. Orientation and spatial frequency selectivity of adaptation to color and luminance gratings. Vision Research. 28:1988;841-856.
    • (1988) Vision Research , vol.28 , pp. 841-856
    • Bradley, A.1    Switkes, E.2    De Valois, K.K.3
  • 7
    • 0023270269 scopus 로고
    • Visual acuity of human infants at scotopic, mesopic and photopic luminances
    • Brown A.M., Dobson V., Maier J. Visual acuity of human infants at scotopic, mesopic and photopic luminances. Vision Research. 27:1987;1845-1858.
    • (1987) Vision Research , vol.27 , pp. 1845-1858
    • Brown, A.M.1    Dobson, V.2    Maier, J.3
  • 8
    • 0028892924 scopus 로고
    • Infant luminance and chromatic contrast sensitivity: Optokinetic nystagmus data on 3-month-olds
    • Brown A.M., Lindsey D.T., McSweeney E.M., Walters M.M. Infant luminance and chromatic contrast sensitivity: optokinetic nystagmus data on 3-month-olds. Vision Research. 35:1995;3145-3160.
    • (1995) Vision Research , vol.35 , pp. 3145-3160
    • Brown, A.M.1    Lindsey, D.T.2    McSweeney, E.M.3    Walters, M.M.4
  • 9
    • 0020777153 scopus 로고
    • An inexpensive scheme for calibration of a colour monitor in terms of CIE standard coordinates
    • Cowan C.B. An inexpensive scheme for calibration of a colour monitor in terms of CIE standard coordinates. Computer Graphics. 17:1983;315-321.
    • (1983) Computer Graphics , vol.17 , pp. 315-321
    • Cowan, C.B.1
  • 11
    • 0033020792 scopus 로고    scopus 로고
    • Infant temporal contrast sensitivity functions (tCSFs) mature earlier for luminance than for chromatic stimuli: Evidence for precocious magnocellular development?
    • Dobkins K.R., Anderson C.M., Lia B. Infant temporal contrast sensitivity functions (tCSFs) mature earlier for luminance than for chromatic stimuli: Evidence for precocious magnocellular development? Vision Research. 39:1998;3223-3239.
    • (1998) Vision Research , vol.39 , pp. 3223-3239
    • Dobkins, K.R.1    Anderson, C.M.2    Lia, B.3
  • 12
    • 0343583609 scopus 로고    scopus 로고
    • Infant color vision: Temporal contrast sensitivity functions for chromatic (red/green) stimuli in 3-month-olds
    • Dobkins K.R., Lia B., Teller D.Y. Infant color vision: temporal contrast sensitivity functions for chromatic (red/green) stimuli in 3-month-olds. Vision Research. 37:1997;1-18.
    • (1997) Vision Research , vol.37 , pp. 1-18
    • Dobkins, K.R.1    Lia, B.2    Teller, D.Y.3
  • 13
    • 0029655536 scopus 로고    scopus 로고
    • Infant contrast detectors are selective for direction of motion
    • Dobkins K.R., Teller D.Y. Infant contrast detectors are selective for direction of motion. Vision Research. 36:1996;281-294.
    • (1996) Vision Research , vol.36 , pp. 281-294
    • Dobkins, K.R.1    Teller, D.Y.2
  • 14
    • 0030273160 scopus 로고    scopus 로고
    • Infant motion:detection (M:D) ratios for chromatically-defined and luminance-defined moving stimuli
    • Dobkins K.R., Teller D.Y. Infant motion:detection (M:D) ratios for chromatically-defined and luminance-defined moving stimuli. Vision Research. 36:1996;3293-3310.
    • (1996) Vision Research , vol.36 , pp. 3293-3310
    • Dobkins, K.R.1    Teller, D.Y.2
  • 15
    • 0018131822 scopus 로고
    • Visual acuity in human infants: A review and comparison of behavioral and electrophysiological studies
    • Dobson V., Teller D.Y. Visual acuity in human infants: a review and comparison of behavioral and electrophysiological studies. Vision Research. 18:1978;1469-1483.
    • (1978) Vision Research , vol.18 , pp. 1469-1483
    • Dobson, V.1    Teller, D.Y.2
  • 16
    • 0020658574 scopus 로고
    • Electrophysiological evidence for spatial frequency selective mechanisms in adults and infants
    • Fiorentini A., Pirchio M., Spinelli D. Electrophysiological evidence for spatial frequency selective mechanisms in adults and infants. Vision Research. 23:1983;119-127.
    • (1983) Vision Research , vol.23 , pp. 119-127
    • Fiorentini, A.1    Pirchio, M.2    Spinelli, D.3
  • 17
    • 0026955656 scopus 로고
    • Contrast detection in luminance and chromatic noise
    • Gegenfurtner K.R., Kiper D.C. Contrast detection in luminance and chromatic noise. JOSA A. 9:1992;1880-1888.
    • (1992) JOSa a , vol.9 , pp. 1880-1888
    • Gegenfurtner, K.R.1    Kiper, D.C.2
  • 18
    • 0343439389 scopus 로고    scopus 로고
    • Chromatic noise masking of Gabor patches in contrast space
    • Giuliani F., Lee W., Eskew R.T. Jr. Chromatic noise masking of Gabor patches in contrast space. IOVS suppl. 37:1996;427.
    • (1996) IOVS Suppl , vol.37 , pp. 427
    • Giuliani, F.1    Lee, W.2    Eskew R.T., Jr.3
  • 20
    • 0023835074 scopus 로고
    • Spatial vision of the achromat: Spatial frequency and orientation-specific adaptation
    • Greenlee M.W., Magnussen S., Nordby K. Spatial vision of the achromat: spatial frequency and orientation-specific adaptation. Journal of Physiology. 395:1988;661-678.
    • (1988) Journal of Physiology , vol.395 , pp. 661-678
    • Greenlee, M.W.1    Magnussen, S.2    Nordby, K.3
  • 21
    • 0343548593 scopus 로고    scopus 로고
    • What mechanisms underlie red/green isoluminance matches at various spatial and temporal frequencies?
    • Gunther K., Peterzell D.H., Dobkins K.R. What mechanisms underlie red/green isoluminance matches at various spatial and temporal frequencies? Investigative Ophthalmology and Visual Science. 38:1997;S892.
    • (1997) Investigative Ophthalmology and Visual Science , vol.38 , pp. 892
    • Gunther, K.1    Peterzell, D.H.2    Dobkins, K.R.3
  • 22
    • 0343984618 scopus 로고    scopus 로고
    • What shared mechanisms underlie CSFs and red/green isoluminance matches at various spatial and temporal frequencies?
    • Gunther K., Peterzell D.H., Dobkins K.R. What shared mechanisms underlie CSFs and red/green isoluminance matches at various spatial and temporal frequencies? Investigative Ophthalmology and Visual Science. 39:1998;S1078.
    • (1998) Investigative Ophthalmology and Visual Science , vol.39 , pp. 1078
    • Gunther, K.1    Peterzell, D.H.2    Dobkins, K.R.3
  • 23
    • 0343984617 scopus 로고
    • Isoluminant stimuli may not expose the full contribution of color to visual functioning: Spatial contrast sensitivity measurements indicate interaction between color and luminance processing
    • Gur M., Akri V. Isoluminant stimuli may not expose the full contribution of color to visual functioning: spatial contrast sensitivity measurements indicate interaction between color and luminance processing. Vision Research. 33:1992;2313-2319.
    • (1992) Vision Research , vol.33 , pp. 2313-2319
    • Gur, M.1    Akri, V.2
  • 24
    • 0031257790 scopus 로고    scopus 로고
    • Development of spatial contrast sensitivity from infancy to adulthood: Psychophysical data
    • Gwiazda J., Bauer J., Thorn F., Held R. Development of spatial contrast sensitivity from infancy to adulthood: psychophysical data. Optometry and Vision Science. 74:1997;785-789.
    • (1997) Optometry and Vision Science , vol.74 , pp. 785-789
    • Gwiazda, J.1    Bauer, J.2    Thorn, F.3    Held, R.4
  • 25
    • 0031257788 scopus 로고    scopus 로고
    • Eye movement-based measures of development of spatial contrast sensitivity in infants
    • Hainline L., Abramov I. Eye movement-based measures of development of spatial contrast sensitivity in infants. Optometry and Vision Science. 74:1997;790-799.
    • (1997) Optometry and Vision Science , vol.74 , pp. 790-799
    • Hainline, L.1    Abramov, I.2
  • 26
    • 0023303626 scopus 로고
    • Ontogenetic change in the analysis of sound frequency in the infant rat
    • Hyson R.L., Rudy J.W. Ontogenetic change in the analysis of sound frequency in the infant rat. Developmental Psychobiology. 20:1987;189-207.
    • (1987) Developmental Psychobiology , vol.20 , pp. 189-207
    • Hyson, R.L.1    Rudy, J.W.2
  • 27
    • 0030878344 scopus 로고    scopus 로고
    • The development of chromatic and achromatic contrast sensitivity in infancy as tested with the sweep VEP
    • Kelly J.P., Borchert K., Teller D.Y. The development of chromatic and achromatic contrast sensitivity in infancy as tested with the sweep VEP. Vision Research. 37:1997;2057-2072.
    • (1997) Vision Research , vol.37 , pp. 2057-2072
    • Kelly, J.P.1    Borchert, K.2    Teller, D.Y.3
  • 29
    • 0343984602 scopus 로고    scopus 로고
    • Infant color vision: direction-of-motion coding of quadrature-shifted isoluminant red/green gratings in 3-month-olds and adults
    • (submitted)
    • Lia, B. L., Dobkins, K. R., Palmer, J., & Teller, D. Y. (1998). Infant color vision: direction-of-motion coding of quadrature-shifted isoluminant red/green gratings in 3-month-olds and adults. Vision Research (submitted).
    • (1998) Vision Research
    • Lia, B.L.1    Dobkins, K.R.2    Palmer, J.3    Teller, D.Y.4
  • 30
    • 0028047229 scopus 로고
    • The spatial tuning of chromatic mechanisms identified by simultaneous masking
    • Losada M.A., Mullen K.T. The spatial tuning of chromatic mechanisms identified by simultaneous masking. Vision Research. 34:1994;331-341.
    • (1994) Vision Research , vol.34 , pp. 331-341
    • Losada, M.A.1    Mullen, K.T.2
  • 31
    • 0029240149 scopus 로고
    • Color and luminance spatial tuning estimated by noise masking in the absence of off-frequency looking
    • Losada M.A., Mullen K.T. Color and luminance spatial tuning estimated by noise masking in the absence of off-frequency looking. JOSA A. 12:1995;250-260.
    • (1995) JOSa a , vol.12 , pp. 250-260
    • Losada, M.A.1    Mullen, K.T.2
  • 32
    • 0020681748 scopus 로고
    • Development of the place principle: Tonotopic organization
    • Lippe W., Rubel E.W. Development of the place principle: tonotopic organization. Science. 219:1983;514-516.
    • (1983) Science , vol.219 , pp. 514-516
    • Lippe, W.1    Rubel, E.W.2
  • 33
    • 0029067066 scopus 로고
    • A covariance structure analysis of flicker sensitivity
    • Mayer M.E., Dougherty R.F., Hu L-T. A covariance structure analysis of flicker sensitivity. Vision Research. 35:1995;1575-1583.
    • (1995) Vision Research , vol.35 , pp. 1575-1583
    • Mayer, M.E.1    Dougherty, R.F.2    Hu, L.-T.3
  • 35
    • 0027425578 scopus 로고
    • Development of infant contrast sensitivity to chromatic stimuli
    • Morrone M.C., Burr D.C., Fiorentini A. Development of infant contrast sensitivity to chromatic stimuli. Vision Research. 33:1993;2535-2552.
    • (1993) Vision Research , vol.33 , pp. 2535-2552
    • Morrone, M.C.1    Burr, D.C.2    Fiorentini, A.3
  • 36
    • 0030271315 scopus 로고    scopus 로고
    • Development of the temporal properties of visual evoked potentials to luminance- And colour-contrast in infants
    • Morrone M.C., Fiorentini A., Burr D.C. Development of the temporal properties of visual evoked potentials to luminance- and colour-contrast in infants. Vision Research. 36:1996;3141-3155.
    • (1996) Vision Research , vol.36 , pp. 3141-3155
    • Morrone, M.C.1    Fiorentini, A.2    Burr, D.C.3
  • 37
    • 0024229619 scopus 로고
    • Analysis of the development of spatial contrast sensitivity in monkey and human infants
    • Movshon J.A., Kiorpes L. Analysis of the development of spatial contrast sensitivity in monkey and human infants. JOSA A. 5:1988;2166-2172.
    • (1988) JOSa a , vol.5 , pp. 2166-2172
    • Movshon, J.A.1    Kiorpes, L.2
  • 38
    • 0021895386 scopus 로고
    • The contrast sensitivity of human colour vision to red-green and blue-yellow chromatic gratings
    • Mullen K.T. The contrast sensitivity of human colour vision to red-green and blue-yellow chromatic gratings. Journal of Physiology. 359:1985;381-409.
    • (1985) Journal of Physiology , vol.359 , pp. 381-409
    • Mullen, K.T.1
  • 39
    • 0030946666 scopus 로고    scopus 로고
    • Absence of linear subthreshold summation between red-green and luminance mechanisms over a wide range of spatio-temporal conditions
    • Mullen K.T., Cropper S.J., Losada M.A. Absence of linear subthreshold summation between red-green and luminance mechanisms over a wide range of spatio-temporal conditions. Vision Research. 37:1997;1157-1165.
    • (1997) Vision Research , vol.37 , pp. 1157-1165
    • Mullen, K.T.1    Cropper, S.J.2    Losada, M.A.3
  • 40
    • 0028672041 scopus 로고
    • Evidence for separate pathways for color and luminance detection mechanisms
    • Mullen K.T., Losada M.A. Evidence for separate pathways for color and luminance detection mechanisms. JOSA A. 11:1994;3136-3151.
    • (1994) JOSa a , vol.11 , pp. 3136-3151
    • Mullen, K.T.1    Losada, M.A.2
  • 41
    • 0032945220 scopus 로고    scopus 로고
    • The spatial tuning of color and luminance peripheral vision measured with notch filtered noise masking
    • Mullen K.T., Losada M.A. The spatial tuning of color and luminance peripheral vision measured with notch filtered noise masking. Vision Research. 39:1999;721-731.
    • (1999) Vision Research , vol.39 , pp. 721-731
    • Mullen, K.T.1    Losada, M.A.2
  • 42
    • 0027611424 scopus 로고
    • Motion at isoluminance: Discrimination/detection ratios and the summation of luminance and chromatic signals
    • Palmer J., Mobley L.A., Teller D.Y. Motion at isoluminance: discrimination/detection ratios and the summation of luminance and chromatic signals. JOSA A. 10:1993;1353-1362.
    • (1993) JOSa a , vol.10 , pp. 1353-1362
    • Palmer, J.1    Mobley, L.A.2    Teller, D.Y.3
  • 43
    • 0345130170 scopus 로고    scopus 로고
    • The development of spatial frequency covariance channels for color and luminance: Psychophysical (FPL) and electrophysiological (sweep-VEP) studies
    • (in press)
    • Peterzell, D. H., Chang, S. K., Kelly, J. P., Hartzler, A. L., & Teller, D. Y. (1997). The development of spatial frequency covariance channels for color and luminance: psychophysical (FPL) and electrophysiological (sweep-VEP) studies. Perception (in press).
    • (1997) Perception
    • Peterzell, D.H.1    Chang, S.K.2    Kelly, J.P.3    Hartzler, A.L.4    Teller, D.Y.5
  • 46
    • 0031259536 scopus 로고    scopus 로고
    • Development of spatial frequency tuned 'covariance' channels: Individual differences in the electrophysiological (VEP) contrast sensitivity function
    • Peterzell D.H., Kelly J.P. Development of spatial frequency tuned 'covariance' channels: individual differences in the electrophysiological (VEP) contrast sensitivity function. Optometry and Vision Science. 74:1997;800-807.
    • (1997) Optometry and Vision Science , vol.74 , pp. 800-807
    • Peterzell, D.H.1    Kelly, J.P.2
  • 48
    • 0030271311 scopus 로고    scopus 로고
    • Individual differences in contrast sensitivity functions: The coarsest spatial pattern analyzer
    • Peterzell D.H., Teller D.Y. Individual differences in contrast sensitivity functions: the coarsest spatial pattern analyzer. Vision Research. 36:1996;3077-3085.
    • (1996) Vision Research , vol.36 , pp. 3077-3085
    • Peterzell, D.H.1    Teller, D.Y.2
  • 49
    • 0033987041 scopus 로고    scopus 로고
    • Spatial frequency tuned covariance channels for red-green and luminance-modulated gratings: Psychophysical data from human adults
    • Peterzell D.H., Teller D.Y. Spatial frequency tuned covariance channels for red-green and luminance-modulated gratings: Psychophysical data from human adults. Vision Research. 39:2000;417-430.
    • (2000) Vision Research , vol.39 , pp. 417-430
    • Peterzell, D.H.1    Teller, D.Y.2
  • 50
    • 0011804354 scopus 로고
    • Individual differences in the contrast sensitivity functions of human adults and infants: A brief review
    • P. Bagnoli, & W. Hodos. New York: Plenum
    • Peterzell D.H., Werner J.S., Kaplan P.S. Individual differences in the contrast sensitivity functions of human adults and infants: a brief review. Bagnoli P., Hodos W. The Changing Visual System. 1991;391-396 Plenum, New York.
    • (1991) The Changing Visual System , pp. 391-396
    • Peterzell, D.H.1    Werner, J.S.2    Kaplan, P.S.3
  • 51
    • 0027477214 scopus 로고
    • Individual differences in contrast sensitivity functions: The first four months of life in humans
    • Peterzell D.H., Werner J.S., Kaplan P.S. Individual differences in contrast sensitivity functions: the first four months of life in humans. Vision Research. 33:1993;381-396.
    • (1993) Vision Research , vol.33 , pp. 381-396
    • Peterzell, D.H.1    Werner, J.S.2    Kaplan, P.S.3
  • 52
    • 0028968359 scopus 로고
    • Individual differences in contrast sensitivity functions: Longitudinal study of 4-, 6- And 8-month-old human infants
    • Peterzell D.H., Werner J.S., Kaplan P.S. Individual differences in contrast sensitivity functions: Longitudinal study of 4-, 6- and 8-month-old human infants. Vision Research. 35:1995;961-980.
    • (1995) Vision Research , vol.35 , pp. 961-980
    • Peterzell, D.H.1    Werner, J.S.2    Kaplan, P.S.3
  • 53
    • 0016242648 scopus 로고
    • A vector-magnitude model of contrast detection
    • Quick R.F. A vector-magnitude model of contrast detection. Kybernetik. 16:1974;65-67.
    • (1974) Kybernetik , vol.16 , pp. 65-67
    • Quick, R.F.1
  • 55
    • 0031253707 scopus 로고    scopus 로고
    • Postreceptoral chromatic detection mechanisms revealed by noise masking in three-dimensional cone contrast space
    • Sankeralli M.J., Mullen K.T. Postreceptoral chromatic detection mechanisms revealed by noise masking in three-dimensional cone contrast space. JOSA A. 14:1997;2633-2646.
    • (1997) JOSa a , vol.14 , pp. 2633-2646
    • Sankeralli, M.J.1    Mullen, K.T.2
  • 57
    • 0029655247 scopus 로고    scopus 로고
    • Retinal illuminance and contrast sensitivity in human infants
    • Shannon E., Skoczenski A.M., Banks M.S. Retinal illuminance and contrast sensitivity in human infants. Vision Research. 36:1996;67-76.
    • (1996) Vision Research , vol.36 , pp. 67-76
    • Shannon, E.1    Skoczenski, A.M.2    Banks, M.S.3
  • 58
    • 0027258125 scopus 로고
    • Sustained and transient mechanisms in the steady-state visual evoked potential: Onset presentation compared to pattern reversal
    • Strasburger H., Murray I.J., Remky A. Sustained and transient mechanisms in the steady-state visual evoked potential: onset presentation compared to pattern reversal. Clinical Vision Science. 8:1993;211-234.
    • (1993) Clinical Vision Science , vol.8 , pp. 211-234
    • Strasburger, H.1    Murray, I.J.2    Remky, A.3
  • 59
    • 0032916549 scopus 로고    scopus 로고
    • Spatial masking does not reveal mchanisms selective to combined luminance and red-green colour
    • Stromeyer, C. F., III, Thabet, R., Chaparro, A., & Kronauer, R. E. (1999). Spatial masking does not reveal mchanisms selective to combined luminance and red-green colour. Vision Research, 39, 2099-2112.
    • (1999) Vision Research , vol.39 , pp. 2099-2112
    • Stromeyer, C.F.1    III Thabet, R.2    Chaparro, A.3    Kronauer, R.E.4
  • 61
    • 0024044412 scopus 로고
    • Contrast dependence and mechanisms of masking interactions among chromatic and luminance gratings
    • Switkes E., Bradley A., De Valois K.K. Contrast dependence and mechanisms of masking interactions among chromatic and luminance gratings. JOSA A. 7:1988;1149-1162.
    • (1988) JOSa a , vol.7 , pp. 1149-1162
    • Switkes, E.1    Bradley, A.2    De Valois, K.K.3
  • 62
    • 0023934012 scopus 로고
    • Development of spatiotemporal mechanisms in infant vision
    • Wilson H.R. Development of spatiotemporal mechanisms in infant vision. Vision Research. 28:1988;611-628.
    • (1988) Vision Research , vol.28 , pp. 611-628
    • Wilson, H.R.1
  • 63
    • 0003008664 scopus 로고
    • Theories of infant visual development
    • K. Simons. Oxford:: Oxford University Press
    • Wilson H.R. Theories of infant visual development. Simons K. Early Visual Development. 1993;560-572 Oxford University Press, Oxford:
    • (1993) Early Visual Development , pp. 560-572
    • Wilson, H.R.1
  • 65
    • 0022480736 scopus 로고
    • A qualitative and quantitative analysis of the human fovea during development
    • Yuodelis C., Hendrickson A.E. A qualitative and quantitative analysis of the human fovea during development. Vision Research. 26:1986;847-855.
    • (1986) Vision Research , vol.26 , pp. 847-855
    • Yuodelis, C.1    Hendrickson, A.E.2


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.