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Office: Pacific
Development and Technology, LLC 999 Commercial Street,
Suite 205, Palo Alto, Ca 94303 E-mail: ltrejo@pacdel.com Telephone: +1-650-320-8841
(voice/fax)
· Neurocognitive technology
for fatigue prevention and human-system performance optimization · Signal processing, machine
learning and pattern recognition algorithms and applications · Brain-computer
interfaces and human-computer interaction · Experimental design
and analysis for biomedical, neurological, and behavioral research
Trejo, L. J., Matthews, R., & Allison, B.
Z. (2007). Experimental Design
and Testing of a Multimodal Cognitive Overload Classifier. In D. D.
Schmorrow, D. M. Nicholson, J. M. Drexler, & L. M. Reeves (Eds.),
Foundations of Augmented Cognition, (4th ed., pp. 13-22). Arlington, VA:
Strategic Analysis, Inc. Trejo, L. J., Knuth, K., Prado, R., Rosipal,
R., Kubitz, K., Kochavi, R., Matthews, B., & Zhang., Y. (2007). EEG-based estimation of mental fatigue: Convergent
evidence for a three-state model. In D.D. Schmorrow, L.M. Reeves (Eds.):
Augmented Cognition, HCII 2007, LNAI 4565, pp. 201–211, 2007. ©
Springer-Verlag Berlin Heidelberg 2007. Trejo, L J., Kochavi, R., Kubitz, K., Montgomery, L.
D., Rosipal, R., & Matthews, B. (2006, January). EEG-based
estimation of mental fatigue. Manuscript submitted for publication. Trejo, L. J., Matthews, B., and Rosipal, R. (2006).
Brain-computer interfaces for 1-D and 2-D cursor control: designs using
volitional control of the EEG spectrum or steady-state visual evoked
potentials. IEEE Trans Neural Syst Rehabil Trejo, L. J., Wheeler, K.R., Jorgensen, C. C., Rosipal,
R., Clanton, S., Matthews, B, Hibbs, A. D., Matthews, R., & Krupka, M.
(2003). Multimodal
neuroelectric interface development. IEEE Transactions on Neural Systems and
Rehabilitation Engineering, 11,
199-204. Rosipal, R. & Trejo, L. J. (2001). Kernel
partial least squares in reproducing kernel Hilbert space. Journal of Machine
Learning Research, 2, 97-123. Rosipal, R.,
Girolami, M. and Trejo, L.,
Cichocki, A. (2001). Kernel PCA for feature extraction and de-noising in
non-linear regression. Neural Computing & Applications, 10, 231-243. Rosipal, R., Girolami, M., & Trejo, L. J. (2000, May). Kernel
PCA Feature Extraction of Event-Related Potentials for Human Signal Detection
Performance. In H. Malmgren, M. Borsa, L. Niklasson (eds.), Perspectives in
Neural Computation. Proceedings of the ANNIMAB-1 Conference on Artificial
Neural Networks in Medicine and Biology. Trejo, L. J., & Shensa, M. J. (1999). Feature extraction
of event-related potentials using wavelets: An application to human
performance monitoring. Brain and
Language 66, 89-107. Available
online at http://www.indealibrary.com
(Article ID brln.1998.2026). Koska, M., Rosipal, R., Konig, A. & Trejo, L. J. (1997). Estimation
of human signal detection performance from event-related potentials using
feed-forward neural network models. In K. Warwick and M. Kárny (Eds.), Computer intensive methods in control and
signal processing: The curse of dimensionality. Kramer,
A. F., Trejo, L. J., &
Humphrey, D. (1996). Psychophysiological measures of human information
processing activities: Potential applications to automated systems. In R.
Parasuraman & J. Mouloua (Eds.), Automation
and Human Performance: Theory and Applications. Trejo, L. J., Ryan-Jones, D., & Kramer, A.
F. (1995). Attentional modulation of the pitch-change mismatch negativity
elicited by frequency differences between binaurally presented tone bursts. Psychophysiology, 32, 319-328. Trejo, L. J., Kramer, A. F., & Arnold, J.
(1995). Event-related potentials as indices of display-monitoring
performance. Biological Psychology, 40, 33-71. Kramer, A. F., Trejo, L. J., & Humphrey D.
(1995). Assessment of mental workload with task-irrelevant auditory probes. Biological Psychology, 40, 83-100. Snyder, H. L.,
& Trejo, L. J. (1992).
Research Methods. In Widdel, H. (Ed.), Colour
in Electronic Displays. Trejo, L. J., Rand, M. N., & Cicerone, C. M.
(1989). Consensual pupillary light reflex in the pigmented rat. Vision Research, 29, 303-307. Trejo, L. J., & Cicerone, C. M. (1987).
Changes in visual sensitivity with age in rats with heredity retinal
degeneration. Vision Research, 27, 915-918. Trejo, L. J. (1985). Retinal ganglion cell loss
produced by intraocular kainic acid in cats: Variation with somal size and
eccentricity. Brain Research, 355, 221-230. Trejo, L. J., & Cicerone, C. M. (1984).
Cells in the pretectal olivary nucleus are in the pathway for the direct
light reflex of the pupil in the rat. Brain
Research, 300, 49-62. Trejo, L. J., & Cicerone, C. M. (1982).
Retinal sensitivity measured by the pupillary light reflex in RCS and albino
rats. Vision Research, 22, 1163-1171.
Trejo,
L. J., Knuth, K., Prado, R., Rosipal, R., Kubitz, K. Kochavi, R., Matthews,
B., & Zhang., Y. (2007). EEG-based
estimation of mental fatigue: Convergent evidence for a three-state model. In Proceedings of
the HCI International 2007 and Augmented Cognition International Conference,
Beijing, China, July 22-27, (pp. 201-211), New York: Springer LNCS. Matthews,
R., McDonald, N. J., Anumula, H. &
Trejo, L. J. (2006). Novel hybrid
sensors for unobtrusive recording of human biopotentials. Proceedings of
2nd Annual Augmented Cognition International Conference. To be
published in 2006 by Augmented Cognition International. Marzullo, T. C.,
Dudley, J. R. , Miller, C. R., Trejo,
L. & Kipke D. R. (2005). Spikes, local field potentials, and
electrocorticogram characterization during motor learning in rats for
brain machine interface tasks. Abstract 1991, 2005 27th Annual International Conference of the
IEEE Engineering in Medicine and Biology Society. Wallerius, J., Trejo, L. J, Matthew, R., Rosipal,
R., and Caldwell, J. A. (2005). Robust feature extraction and classification
of EEG spectra for real-time classification of cognitive state. 11th International Conference on Human
Computer Interaction jointly with 1st International Conference on Augmented
Cognition. Trejo, L. J., Matthews, B., and Rosipal, R.
(2005). Brain-Computer Interfaces for 1-D and 2-D Cursor Control: Designs
using Volitional Control of the EEG Spectrum or Steady-State Evoked
Potentials. Brain-Computer Interface Technology. Third International Meeting,
June 14-19, The Rensselaerville Institute. Trejo, L J., Kochavi, R., Kubitz, K.,
Montgomery, L. D., Rosipal, R., & Matthews, B. (2005, April). Measures
and models for predicting cognitive fatigue. In John A. Caldwell & Nancy
Jo Wesensten (eds.), Biomonitoring for
Physiological and Cognitive Performance During Military Operations,
Proceedings of Symposium OR05 Defense and Security, 28 March-1 April
2005, Kissimmee, FL. Proceedings of SPIE, 5797, 105-115. Trejo, L. J., Kochavi, R., Kubitz, K.,
Montgomery, L. D., Rosipal, R., & Matthews, B. (2004, October). Measures
and models for estimating and predicting cognitive fatigue. Fourty-fourth
Annual Meeting of the Society for Psychophysiological Research, October
20-24, Santa Fe, New Mexico, USA. Rosipal, R., & Trejo, L. (2004, October). Kernel PLS
estimation of single-trial event-related potentials. Fourty-fourth Annual
Meeting of the Society for Psychophysiological Research, October 20-24, Santa
Fe, New Mexico, USA. Rosipal, R., Trejo, L. J., and Matthews, B. (2003,
August). Kernel PLS-SVC for Linear and Nonlinear Classification. In
Proceedings of the Twentieth International Conference on Machine Learning
(ICML-2003), 640-647. Rosipal, R., Trejo, L. J., Matthews, B, and
Wheeler, K. (2003, September). Nonlinear kernel-based chemometrics tools: a
machine learning approach. PLS’03. Third International Symposium on PLS and
Related Methods. ISEGI – Universidade
Nova de Lisboa. Knuth K.H., Clanton
S.T., Shah A.S., Truccolo W.A., Ding M., Bressler S.L., Trejo L.J., Schroeder C.E. (2002, November). Multiple component
event-related potential (mcERP) estimation. Soc. Neurosci. Abstr.,
Vol. 28, Prog. No. 506.4. Trejo, L. J., Wheeler, K.R.,
Jorgensen, C. C., Rosipal, R. & Hibbs, A. D. (2002, June). Multimodal
neuroelectric interface development. Brain-Computer Interface Technology:
Moving Beyond Demonstrations, June 12-16, 2002, Rensselaerville Institute, Trejo, L. J., Johnson, T., & Hyatt, A. (2000, June). Visual-auditory
interactions and mismatch negativity: A study of the McGurk effect. Second
International Congress on Mismatch Negativity and its Clinical Applications. Rosipal, R., Girolami, M., & Trejo, L. J.
(2000, May).
Kernel PCA Feature Extraction of Event-Related Potentials for Human Signal
Detection Performance. In H. Malmgren, M. Borsa, L. Niklasson (eds.),
Perspectives in Neural Computation. Proceedings of the ANNIMAB-1 Conference
on Artificial Neural Networks in Medicine and Biology. 321-326. Koska, M., Rosipal,
R., Konig, A. & Trejo, L. J. (1997). Estimation of human signal
detection performance from event-related potentials using feed-forward neural
network models. In K. Warwick and M. K??rny (Eds.), Computer intensive methods
in control and signal processing: The curse of dimensionality. Trejo, L. J., &
Johnson, T. M. (1996, October). The MMN is sensitive to perceptual changes in
the absence of physical changes in an auditory stimulus. Society for
Psychophysiological Research, Thirty-Seventh Annual Meeting. Koska, M., Rosipal,
R., Konig, A., & Trejo, L. J. (1996, June). Estimation of human signal
detection performance from event-related potentials using feed-forward neural
network model. Trejo, L. J., & Kramer, A. F.
(1995, November). Psychophysiological measurement of situation awareness.
International Conference on Experimental Analysis and Measurement of Situation
Awareness. Trejo, L. J., & Mullane, M. M. (1995, October).
ERPs and visual signal detection Performance: Classification functions based
on wavelet decompositions. Society for Psychophysiological Research,
Thirty-Fifth Annual Meeting, Trejo, L. J., &
Shensa, M. J. (1993). Linear and neural network models for predicting human
signal detection performance from event-related potentials: A comparison of
the wavelet transform with other feature extraction methods. Proceedings
of the Fifth Workshop on Neural Networks: Academic/Industrial/NASA/Defense,
SPIE Volume 2204 (pp. 153-161). Trejo, L. J., & Shensa,
M. J. (1993). Pattern recognition neural networks for human event-related
potentials (ERP): A comparison of feature extraction methods. In J. I. Borack
(ed.), Applications of Artificial Neural Networks and Related Technologies
to Manpower, Personnel, and Training (Report No. AP-93-10). Trejo, L. J.,
Ryan-Jones, D., & Kramer, A. F. (1992, October). Attentional modulation
of the pitch-change mismatch negativity. Society for Psychophysiological
Research, Annual Meeting, Trejo, L. J., Kramer, A.
F., & Humphrey, D. (1992, October). Differential workload sensitivity of
early and late components of the auditory probe ERP. Society for
Psychophysiological Research, Annual Meeting, Blankenship, M. H.,
Trejo, L. J., Lewis, G. W., & Sorenson, R. C. (1992, October).
P300 and dual-task mental workload assessment: Increased workload sensitivity
after removing N1 covariance. Society for Psychophysiological Research,
Annual Meeting, Trejo, L. J. &
Kramer, A. F. (1992, June) ERP indices of performance quality in signal
detection, running memory, and computation. Fourth Annual Convention of the
American Psychological Society. Trejo, L. J., Lewis, G.
W., & Kramer, A. F. (1991, October). ERP indices of human performance:
effects of stimulus relevance and type of information processing. Society for
Psychophysiological Research, Annual Meeting. Kaylani, T., Mazzara,
M., DasGupta, S., Hohenberger, M., & Trejo , L. J. (1991,
February). Classification of ERP signals using neural networks. Proceedings
of the Second Workshop on Neural Networks: Academic/Industrial/NASA/Defense,
pp. 737-742. Space Power Institute: DasGupta, S.,
Hohenberger, M., Trejo, L. J., & Mazzara, M. (1990, February).
Effect of using peak amplitudes of ERP signals for a class of neural network
classification. Proceedings of the First Workshop on Neural Networks:
Academic/Industrial/NASA/Defense, pp. 101-114. Space Power Institute: DasGupta, S.,
Hohenberger, M., Trejo, L., & Kaylani, T. (1990, April). Effect of
data compression of ERP signals preprocessed by FWT algorithm upon a neural
network classifier. Proceedings of the 23rd Annual Simulation Symposium.
Lewis, G. W., Trejo,
L. J., Inlow, M., & Blankenship, M. H. (1989, October). Short term
changes in the neuromagnetic evoked field. 19th Annual Meeting of the Society
for Neuroscience. Trejo, L. J., &
Lewis, G. W. (1989, October). Individual differences in classification of
transient, isoluminant, chromatic signals: A behavioral and
electrophysiological analysis. Annual Meeting of the Optical Society of Lewis, G. W., Trejo,
L. J., Naitoh, P., Blankenship, M. H., & Inlow, M. (1989). Temporal
variability of the neuromagnetic field: Implications for human performance
measurement. In Williamson, S. J., Hoke, M., Stroink, G., & Kotani, M. Advances
in Biomagnetism, pp. 217-220. Trejo, L. J., &
Lewis, G. W. (1988a). Sensitivity to hue differences measured by visual
evoked potentials. In D. Eggleson, (Ed.), First Navy Independent
Research/Independent Exploratory Development Symposium, Volume 1 (CPIA Publication
492), pp. 309-316. Lewis, G. W., Trejo,
L. J., Nunez, P., Weinberg, H., & Naitoh, P. (1988). Evoked neuromagnetic
fields: Implications for indexing performance. In K. Atsumi, T. Katila, M. Kotani,
S. J. Williamson, & S. Ueno (Eds.), Biomagnetism 1987. Proceedings of
the Sixth International Conference on Biomagnetism. Lewis, G. W., Trejo,
L. J., Trejo, L. J. (1983).
Selective neurotoxic effects of kainic acid upon cat retinal ganglion cells. Invest.
Ophthalmol. Vis. Sci. Suppl . 24, 261. Trejo, L. J., &
Cicerone, C. M (1981). Asymmetry of ON and OFF cell responses in pupillary
light reflex pathways of the rat. Invest. Ophthalmol. Vis. Sci. Suppl.
20, 15. Trejo, L. J., &
Cicerone, C. M. (1979). The pupillary light reflex in rats with hereditary
retinal degeneration. Optical Society of Trejo, L. J., &
Cicerone, C. M. (1978). Pupillary light reflex shows shift from photopic to
scotopic spectral sensitivity with age in rats (RCS) with retinal dystrophy. Invest.
Ophthalmol. Vis. Sci. Suppl., 114.
Rosipal R., & Trejo,
L. J. (2001, February). Kernel Partial Least Squares Regression in RKHS.
Technical report, CIS Department, Rosipal R., Trejo L.J., and Cichocki A.
(2000).
Kernel principal component regression with EM approach to nonlinear principal
components extraction. Technical report, RIKEN. Trejo, L. J., Mullane,
M., & Stewart, J. (May, 1995). Event-related potentials and
electro-encephalograms in adaptive operator training. NPRDC Technical
Report (TN-95-3). Trejo, L. J., Inlow, M.,
Stanny, R. R., Morey, W. A., Makeig, S., Kobus, D. A., & Hillyard, S. A.
(1991). The P300 component of the auditory event-related potential:
Interlaboratory consistency and test-retest reliability (NPRDC Technical
Report TR-91-6). Ryan-Jones, D. L.,
Lewis, G. W., Trejo, L. J., & Hemmer, J. D. (1990). Brain activity
during visual recognition. In W. E. Montague, & C. C. Scheifers, (Eds.), Independent
Research and Exploratory Development Programs: FY89 Annual Report, (NPRDC
Report AP 90-6), pp. 7-20. Trejo, L. J., Lewis, G.
W., & Blankenship, M. H. (1990). Brain Activity during
decision-making: III. Relationships between probe-evoked potentials,
simulation performance, and on-job performance (NPRDC Technical Note
90-09). Trejo, L. J., &
Lewis, G. W. (1989). Brain mechanisms for human color vision: Implications
for display systems. In W. E. Montague, & C. C. Scheifers, (Eds.), Independent
Research and Exploratory Development Programs: FY88 Annual Report, (NPRDC
Report AP 89-7), pp. 18-32. Blankenship, M. H.,
Trejo, L. J., & Lewis, G. W. (1988a). Brain activity during
tactical decision-making: IV. Event-related potentials as indices of
selective attention and cognitive workload (NPRDC Technical Note 89-6). Blankenship, M. H.,
Trejo, L. J., & Lewis, G. W. (1988b). Brain activity during
tactical decision-making: V. A cross-study validation of evoked potentials as
indices of cognitive workload (NPRDC Technical Note 89-7). Trejo, L. J., &
Lewis, G. W. (1988b). Brain mechanisms of human color vision-implications for
display systems. In W. E. Montague, (Ed.), Independent Research and
Independent Exploratory Development Programs, FY87 Annual Report (NPRDC
Annual Report AP 88-5). Trejo, L. H., Lewis, G.
W., & Blankenship, M. H. (1987). Brain activity during tactical
decision-making: II. Probe-evoked potentials and workload (NPRDC Tech.
Note 88-12). Trejo, L. J., &
Lewis G. W. (1987). Brain mechanism for human color vision. In A. M. Crawford
& M. H. Metcalfe (Eds.), FY86 Independent Research/Independent
Exploratory Development (NPRDC Special Report 87-1). Trejo, L. J. (1986). Brain
activity during tactical decision-making: Capacitive Sensors and Physiological Gauges for
Human-Machine Interaction (2006, June). Invited seminar. Wadsworth Institute, Viva Technology Program (2004, May).
Invited educational outreach presentation on career development and
motivation for high school students. Signal Processing and Machine-learning Algorithms for
Brain-Computer Interfaces. (2003, July). Invited seminar. Redwood Neuroscience Institute. Signal Processing and Machine-learning Algorithms for
Brain-Computer Interfaces. (2003, April). Invited seminar. ERPs and EEGs for Personnel Assessment: Reality or
Fantasy? (1996, June). Invited
speaker. ICON VI. Sixth International Cognitive Neuroscience Meeting. Applications of wavelets
to on-line measurement and classification of event-related potentials. (1996, January).
Invited speaker. Physiological
Measurement Techniques (1995, November). Invited panelist. International
Conference on Experimental Analysis and Measurement of Situation Awareness, Event-related
potentials, EEG and mental workload estimation: Bridging the gap between the
laboratory and the workplace (1995, October). Invited panelist,
Symposium on Recent Advances in the Psychophysiology of Mental Workload.
Society for Psychophysiological Research, Thirty-Fifth Annual Meeting, Quantitative
relationships between event-related potentials and human performance (1993, November).
Invited participant, EEG in Basic and Applied Settings Meeting, Air Force
Human Engineering Laboratory, Predicting human
performance from EEG and event-related potentials (1993, November).
Plenary address, 1993 International Simulation Technology Multiconference. Wavelet analyses of
brain activity and cognition (1993, October). Invited participant,
Third Meeting on Neural Constraints on Cognitive Architectures, Office of
Naval Research and Learning Research and Applications of
event-related potentials to performance assessment (1993, April).
Invited address, Department of Psychology, An overview of
human performance research at the Navy Personnel Research and Analysis of human
brain electrical activity: Towards real-time prediction of human performance (1989, October).
Invited address, Department of Electrical Engineering, Individual
differences in visual evoked potentials at isoluminance (1987, April).
Invited address, Department of Psychology, Brain mechanisms of
human color vision: Implications for display systems (1987, September).
Invited address, Human-computer interaction Group, Naval Research Laboratory,
Retinal ganglion
all loss produced by intraocular kainic acid in cats; variation with somal
size and eccentricity (1984, June). Invited address, Neurological Sciences
Institute,
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