Alan M. Lefcourt, Research Biomedical Engineer
USDA, ARS, BA, ANRI, EMFSL
10300 Baltimore Avenue
Building 303 BARC-East
Beltsville, MD 20705-2350
Phone: 301.504.8450 ext 258
Fax: 301.504.9466
Email: Alan.Lefcourt@ars.usda.gov

www.ars.usda.gov/ba/anri/emfsl/alanlefcourt

A publications list drawn from the ARS database for Alan Lefcourt is also available, with access to an abstract/summary for each publication.

2001 | 2002 | 2003 | 2004 | 2005 | 2006 | 2007 | 2008

For selected publications, click on the  icon to view the full article in PDF format. The  free Adobe Acrobat Reader® is needed to view the PDF files on this page.

2008

1. Kim, M.S., Chen, Y.-R., Cho, B., Lefcourt, A.M., Chao, K. and Yang, C.-C. 2008. Online hyperspectral line-scan fluorescence imaging for safety inspection of apples. Acta Horticulturae. 768(1):385-390.
2. Kim, M.S., Cho, B., Lefcourt, A.M., Chen, Y.R., and Kang, S. 2008. Multispectral fluorescence lifetime imaging of animal feces contaminated apples by time-resolved laser-induced fluorescence imaging system with tunable excitation wavelengths. Applied Optics. 47:1608-1616.
3. Kim, M.S., Lee, K., Chao, K., Cho, B., Lefcourt, A.M., Jun, W., and Chan, D. 2008. Online multitasking imaging for safety and quality inspection of apples. Modern Physics Letter B. In press. (Accepted Mar. 5, 2008)
4. Kim, M.S., Lee, K., Chao, K., Lefcourt, A.M, Jun, W., Chan, D.E. 2008. Multispectral line-scan imaging system for simultaneous fluorescence and reflectance measurements of apples: multitask apple inspection system. Sensing and Instrumentation for Food Quality and Safety. 2(2):123-129.
5.  Lefcourt, A.M., Narayanan, P., Tasch, U., Rostamian, R., Kim, M.S., and Chen, Y.R. 2008. Technical note: Algorithms for parameterization of dynamics of inertia-based apple orientation. Applied Engineering in Agriculture. 24(1):123-129.
6. Narayanan, P., Lefcourt, A.M., Kim, M.S., Tasch, U., Rostamian, R., and Grinblat, A. 2008. Development of technology for orienting apples for automated on-line inspection. Transactions of ASABE. (accepted 07/15/2008)
7.  Narayanan, P., Lefcourt, A.M., Tasch, U., Rostamian, R., Grinblat, A., and Kim, M.S. 2008. Theoretical analysis of stability of axially symmetric rotating objects with regard to orienting apples. Transactions of the ASABE 51(4):1353-1364.

2007

1.  Kim, M.S., Chen, Y.R., Cho, B.K., Chao, K., Yang, C., Lefcourt, A.M., and Chan, D. 2007. Hyperspectral reflectance and fluorescence line-scan imaging for online defect and fecal contamination inspection of apples. Sensing and Instrumentation for Food Quality and Safety. 1(3):151-159.
2.  Liu, Y., Chen, Y.R., Kim, M.S., Chan, D.E., and Lefcourt, A.M. 2007. Development of simple algorithms for the detection of fecal contaminants on apples from visible/near infrared hyperspectral reflectance imaging. Journal of Food Engineering. 81:412-418.

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2006

1.  Kim, M.S., Chen, Y.R., Kang, S., Kim, I., Lefcourt, A.M., and Kim, M.S. 2006. Fluorescence characteristics of wholesome and unwholesome chicken carcasses. Applied Spectroscopy. 60(10):1210-1216.
2. Kim, M.S., Cho, B.K., Yang, C.C., Chao, K., Lefcourt, A.M., and Chen, Y.R. 2006. Hyperspectral reflectance and fluorescence line-scan imaging system for online detection of fecal contamination on apples. In: Chen, Y.R., Meyer, G.E., Tu, S.I., editors. Proceedings of SPIE, Volume 6381. Optics for Natural Resources, Agriculture, and Foods, October 3, 2006, Boston, Massachusetts. 6381:63810P.
3. Lefcourt, A.M., Narayanan, P., Tasch, Y., Rostamian, R., Kim, M.S., and Chen, Y.R. 2006. Development of video technology to analyze dynamics of inertia-based apple orientation. In: Chen, Y.R., Meyer, G.E., Tu, S.I., editors. Proceedings of SPIE, Volume 6381. Optics for Natural Resources, Agriculture, and Foods, October 3, 2006, Boston, Massachusetts. 6381:63810Q.

2005

1.  Kim, M.S., Lefcourt, A.M., and Chen, Y.R. 2005. Multispectral laser induced fluorescence imaging techniques for nondestructive assessment of postharvest food quality and safety. Proc. 5th International Postharvest Symposium, eds. F. Mencarelli and P. Tonutti. Acta Hort. 682: 1379-1385.
2.  Kim, M.S., Lefcourt, A.M., Chen, Y.R., and Tao, Y. 2005. Automated detection of fecal contamination of apples based on multispectral fluorescence image fusion. Journal of Food Engineering. 71(1):85-91.
3.  Lefcourt, A.M., Kim, M.S., and Chen, Y.R. 2005. A transportable fluorescence imaging system for detecting fecal contaminants. Computers and Electronics in Agriculture. 48(1):63-74.
4.  Lefcourt, A.M., Kim, M.S., and Chen, Y.R. 2005. Detection of fecal contamination on apples with nanosecond-scaled time-resolved imaging of laser-induced fluorescence. Applied Optics. 44(7):1160-1170.
5.  Lefcourt, A.M., Kim, M.S., and Chen, Y.R. 2005. Detection of fecal contamination in apple calyx by multispectral laser-induced fluorescence. Transactions of the ASAE 48(4):1587-1593.
6.  Vargas, A.M., Kim, M.S., Tao, Y., Lefcourt, A.M., Chen, Y.R., Luo, Y., Song, Y., and Buchanan, R. 2005. Detection of fecal contamination on cantaloupes using hyperspectral fluorescence imagery. Journal of Food Science. 70(8):E471-E476.

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2004

1.  Cheng, X., Chen, Y.R., Tao, Y., Wang, C.Y., Kim, M.S., and Lefcourt, A.M. 2004. A novel integrated PCA and FLD method on hyperspectral image feature extraction for cucumber chilling damage inspection. Transactions of the ASAE. 47(4):1333-1320.
2.  Kim, M.S., Lefcourt, A.M., Chen, Y.R., and Kang, S. 2004. Uses of hyperspectral and multispectral laser induced fluorescence imaging techniques for food safety inspection. Key Engineering Materials. 270-273:1055-1063.

2003

1. Kim, M.S., Lefcourt, A.M., and Chen, Y.R. 2003. Multispectral laser-induced fluorescence imaging system for large biological samples. Applied Optics. 42(19):3927-3934.
2. Kim, M.S., Lefcourt, A.M., and Chen, Y.R. 2003. Optimal fluorescence excitation and emission bands for detection of fecal contamination. Journal of Food Protection. 66(7): 1198-1207.
3.  Lefcourt, A.M., Kim, M.S., and Chen, Y.R. 2003. Automated detection of fecal contamination of apples by multispectral laser-induced fluorescence imaging. Applied Optics. 42(19):3935-3943.

2002

1.  Kim, M.S., Lefcourt, A.M., Chao, K., Chen, Y.R., Kim, I., and Chan, D.E. 2002. Multispectral detection of fecal contamination on apples based on hyperspectral imagery: Part I. Application of visible and near-infrared reflectance imaging. Transactions of the ASAE. 45(6):2027-2037.
2.  Kim, M.S., Lefcourt, A.M., Chen, Y.R., Kim, I., Chan, D.E., and Chao, K. 2002. Multispectral detection of fecal contamination on apples based on hyperspectral imagery: Part II. Application of hyperspectral fluorescence imaging. Transactions of the ASAE. 45(6):2039-2047.
3.  Lefcourt, A.M. 2002. Some potential problems for measuring ammonia emissions from farm structures. Transactions of the ASAE. 45(5):1585-1591.

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2001

1. Capuco, A.V., Wood, D.L., Elsasser, T.H., Kahl, S., Lefcourt, A.M., and Piperova, L.S. 2001. Effect of somatotrophin on thyroid hormones and cytokines in lactating dairy cows during al libitum and restricted intake. Journal of Dairy Science. 84:2430-2439.
2.  Lefcourt, A.M. 2001. Large environmental chamber: Ammonia recovery calibration. Applied Engineering in Agriculture. 17(5):683-689.
3.  Lefcourt, A.M., Buell, B., and Tasch, U. 2001. Large environmental chamber: Design and operating characteristics. Applied Engineering in Agriculture. 17(5):691-701.
4. Lefcourt, A.M., and Meisinger, J.J. 2001. Effect of adding alum or zeolite to dairy slurry on ammonia volatilization and chemical composition. Journal of Dairy Science. 84:1814-1821.
5.  Meisinger, J.J., Lefcourt, A.M., and Thompson, R.B. 2001. Design and validation of a mobile windtunnel used for measurement of ammonia emissions. Applied Engineering in Agriculture. 17(3):375-381.
6. Meisinger, J.J., Lefcourt, A.M., Van Kessel, J., and Wilkerson, V. 2001. Managing ammonia emissions from dairy cows by amending slurry with alum or zeolite or by diet modification. The Scientific World. 1(Suppl 2):860-965.

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Environmental Microbial and Food Safety Laboratory
Henry A. Wallace Beltsville Agricultural Research Center, Beltsville, MD 20705
Building 173 BARC-East, Phone 301.504.5607
www.ars.usda.gov/ba/anri/emfsl