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United States Department of Agriculture

Agricultural Research Service

Selected Publications
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www.ars.usda.gov/ba/emfsl/alanlefcourt

Alan M. Lefcourt, Ph.D.
Research Biomedical Engineer

USDA, ARS, BA, BARC, EMFSL
10300 Baltimore Ave.
Building 303 BARC-East, Room 021A
Beltsville, MD 20705-2350 USA
phone: 301.504.8450 ext 258
fax: 301.504.9466
alan.lefcourt@ars.usda.gov


In the lists below, the clickable  icon indicates that a publication can be opened in PDF format. A PDF reading program, such as the free Adobe Acrobat Reader®, is needed to view the PDF files on this page.

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 | 2009 | 2010
2011 | 2012 | 2013 | 2014
Patents

Patents

  1. Click here to view or download PDF file Chao, K., Kim, M.S., Lefcourt, A.M., Tuschel, D., Olkhovyk, O, and Liu, Y. Systems and Methods for Detecting Contaminants in a Sample. US Patent #, 8,467,052. USPTO, June 18, 2013.
  2. Click here to view or download PDF file Kim, M.S., Lefcourt, A.M., Chao, K., Chen, Y.R., Senecal, A., Marek, P. Hand-held inspection tool and method. US Patent #8,310,544 B2. USPTO, Nov 7, 2012.
  3. Click here to view or download PDF file Kim, M.S., Chen, Y., Chao, K., and Lefcourt, A.M. Simultaneous acquisition of fluorescence and reflectance imaging techniques with a single imaging device for multitask inspection. US Patent # 7,787,111, USPTO. Aug. 31, 2010.
  4. Click here to view or download PDF file Lefcourt, A.M., Kim, M.S., and Chen, Y.R. Use of Nanosecond Scale, Time-Resolved, Imaging to Differentiate Contemporaneous Fluorescence Responses For Multiple Substances. US Patent, #7,547,508. USPTO. June 16, 2009.
  5. Click here to view or download PDF file Kim, M.S., Lefcourt, A.M., and Chen, Y.R. Method to detect exposed bone fragments during processing of meat or fish. US Patent #7,460,227, USPTO. Dec. 2, 2008.
  6. (Pending) Kim, M.S., Chao, K., Lefcourt, A.M., Lee, K., Kang, S., and Chan, D. Single-camera angled conveyance imaging method and apparatus for whole-surface inspection of rotating objects. USPTO, Utility Patent application submitted. March 2013.

2014

  1. Click here to view or download PDF file Lee, H.Y., Yang, C.C., Kim, M.S., Lim, J., Cho, B., Chao, K., and Lefcourt, A.M., and Everard, C. A simple multispectral imaging algorithm for detection of defects on Red Delicious apples. J. of Biosystems Engineering, 39(2):142-149. 2014. doi:10.5307/JBE.2014.39.2.142
  2. Click here to view or download PDF file Shilts, P., Motabar, P., Lefcourt, A.M., Kim, M.S., and Tasch, U. Homogenization optics to improve detectability of a fluorescence response to a single laser pulse: Detection of feces on apples. Trans. ASABE 57(2): 615-622. 2014. doi:10.13031/trans.57.10443

2013

  1. click here to view the PDF of this article Liu, N.T., Lefcourt, A.M., Nou, X., Shelton, D.R., Zhang, G., and Lo, Y.M. 2013. Native microflora in fresh-cut-produce processing plants and their potentials for biofilm formation. J. Food Protection, in press.
  2. click here to view the PDF of this article Lefcourt, A.M., Wiederoder, M.S., Liu, N.T., Kim, M.S., and Lo, Y.M. 2013. Development of a portable hyperspectral imaging system for monitoring the efficacy of sanitation procedures in food processing facilities. J. of Food Engineering 117: 59-66.
  3. click here to view the PDF of this article Wiederoder, M.S., Liu, N.T., Lefcourt, A.M., Kim, M.S., and Lo, Y.M. 2013. Use of a portable hyperspectral imaging system for monitoring the efficacy of sanitation procedures in produce processing plants. J. of Food Engineering 117: 217-226.

2012

  1. Kim, M.S., Lefcourt, A.M., Chao, K., Chen, Y.R., Senecal, A.G., and Marek, P. 2012. Hand-held inspection tool and method. US Patent # 8,310,544, Nov. 13.
  2. click here to view the PDF of this article Wiederoder, M.S., Lefcourt, A.M., Kim, M.S., and Lo, Y.M. 2012. Detection of fresh-cut produce processing residues on food contact surface materials using hyperspectral imaging. Food Measure 6:48-55.

2011

  1. Kim, M.S., Chao, K., Chan, D.E., Jun, W., Lefcourt, A.M., Delwiche, S.R., and Lee, K. 2011. Line-scan hyperspectral imaging platform for food safety and quality evaluation: System characterization and enhancement. Trans. ASABE. 54(2):703-711.
  2. Kim, M.S., Chao, K., Chan, D.E., Yang, C., Lefcourt, A.M., and Delwiche, S.R. 2011. Hyperspectral and multispectral imaging technique for food quality and safety inspection. In: Cho, Y., Kang, S. Emerging Technologies for Food Quality and Food Safety Inspection. New York, N.Y.: CRC Press. p. 207-234.
  3. click here to view the PDF of this article Motabar, P., Lefcourt, A.M., Tasch, U., Kim, M.S., and Rostamian, R. 2011. Use of inertial properties to orient tomatoes. Trans. ASABE. 54(2):517-525.
  4. Yang, C.C., Kim, M.S., Chao, K., Kang, S., Lefcourt, A.M. 2011. Fast and accurate image recognition algorithms for fresh produce food safety sensing. Proceedings of SPIE Vol. 8027, G:1-12.
  5. Yang, C.C., Kim, M.S., Kang, S., Cho, B., Chao, K., Lefcourt, A.M., and Chan, D.E. 2011. Red to far-red multispectral fluorescence image fusion for detection of fecal contamination on apples. J. of Food Engineering, 10.1016/j.jfoodeng.2011.08.008.
  6. Yang, C.C., Kim, M.S., Kang, S., Tao, T., Chao, K., Lefcourt, A.M., and Chan, D.E. 2011. Development of a simple multispectral algorithm for detection of fecal contamination on apple. Sensing and Instrumentation for Food Quality and Safety. 5(2):10-18.

2010

  1. Kim, M.S., Chao, K., Chan, D., Yang, C.C., Lefcourt, A.M., and Delwiche, S. 2010. Hyperspectral imaging technologies for Nondestructive Agro-food evaluation. Proceeding of International Symposium on Advanced and Innovative Sensing Technology for Agro-food Quality Measurement, pp: 57-71.
  2. Kim, M.S., Chen, Y., Chao, K., and Lefcourt, A.M. 2010. Simultaneous acquisition of fluorescence and reflectance imaging techniques with a single imaging device for multitask inspection. US Patent # 7,787,111, Aug. 31.
  3. click here to view the PDF of this article Yang, C.C., Jun, W., Kim, M.S., Chao, K., Kang, S., Chan, D., and Lefcourt, A.M. 2010. Classification of fecal contamination on leafy greens by hyperspectral imaging. Proceedings of SPIE. 7676:76760F.

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2009

  1. Jun, W., Kim, M.S., Chao, K., and Lefcourt, A.M. 2009. Detection of microbial biofilms on food processing surfaces: Hyperspectral fluorescence imaging study. Proceedings of SPIE. 7315:73150S-1-8.
  2. Kim, M.S., Chao, K., Chan, D.E., and Lefcourt, A.M. 2009. Line-scan imaging for improved high-speed food safety inspection. SPIE News Room Article, 10.1117/2.1200903.1564.
  3. Kim, M.S., Chao, K., Chan D.E., Jun, W., Lee, K., Kang, S., Yang, C.C., and Lefcourt, A.M. 2009. Nondestructive sensing technologies for food safety, International symposium for Improvement of Agro-Food Safety, Proceedings. pp:119-126.
  4. Lefcourt, A.M., Kim, M.S., and Chen, Y.R. 2009. Use of Nanosecond Scale, Time-Resolved, Imaging to Differentiate Contemporaneous Fluorescence Responses For Multiple Substances. US Patent, 7,547,508, Jun. 16.
  5. click here to view the PDF of this article Lefcourt, A.M., Narayanan, P., Tasch, U., Kim, M.S., Reese, D., Rostamian, R., and Lo, Y.M. 2009. Orienting apples for imaging using their inertial properties and random apple loading. Biosystems Engineering. 104(1):64-71. doi:10.1016/j.biosystemseng.2009.06.002
  6. Reese, D., Lefcourt, A.M., Kim, M.S., and Lo, M. 2009. Using parabolic mirrors to image 100% of the surface of apples. Bioresource Technology. 100:4499-4506.

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2008

  1. Kim, M.S., Lefcourt, A.M., and Chen, Y.R. 2008. Method to detect bone fragments during the processing of meat or fish. US Patent # 7,460,227, Dec. 2.
  2. 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.
  3. 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.
  4. 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)
  5. 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.
  6. click here to view the PDF of this article 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.
  7. 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)
  8. click here to view the PDF of this article 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.

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2007

  1. click here to view the PDF of this article 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. click here to view the PDF of this article 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. click here to view the PDF of this article 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.

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2005

  1. click here to view the PDF of this article 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. click here to view the PDF of this article 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. click here to view the PDF of this article 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. click here to view the PDF of this article 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. click here to view the PDF of this article 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. click here to view the PDF of this article 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. Tasch, U., Erez, B., Lefcourt, A.M., and Varner, M. 2004. Method and apparatus for detecting lameness in animals. US Patent # 6,699,207, Mar. 2.
  2. click here to view the PDF of this article 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.
  3. click here to view the PDF of this article 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.

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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. click here to view the PDF of this article 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.

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2002

  1. click here to view the PDF of this article 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. click here to view the PDF of this article 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. click here to view the PDF of this article 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. click here to view the PDF of this article Lefcourt, A.M. 2001. Large environmental chamber: Ammonia recovery calibration. Applied Engineering in Agriculture. 17(5):683-689.
  3. click here to view the PDF of this article 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. click here to view the PDF of this article 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
US Department of Agriculture, Agricultural Research Service
www.ars.usda.gov/ba/emfsl



Last Modified: 9/3/2014
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