Academic Appointments


  • Adjunct Professor, Civil and Environmental Engineering

All Publications


  • Fuzzy-QFD approach based decision support model for licensor selection EXPERT SYSTEMS WITH APPLICATIONS Wang, L., Juan, Y., Wang, J., Li, K., Ong, C. 2012; 39 (1): 1484-1491
  • Quantifying videotaped activity patterns: Video translation software and training methodologies (Reprinted from the Journal of Exposure Analysis and Environmental Epidemiology, vol 7, pg 535-542, 1997) JOURNAL OF CLEAN TECHNOLOGY ENVIRONMENTAL TOXICOLOGY AND OCCUPATIONAL MEDICINE Zartarian, V. G., Ferguson, A. C., Ong, C. G., Leckie, J. O. 1998; 7 (3): 251-258
  • Quantifying videotaped activity patterns: Video translation software and training methodologies JOURNAL OF EXPOSURE ANALYSIS AND ENVIRONMENTAL EPIDEMIOLOGY Zartarian, V. G., Ferguson, A. C., Ong, C. G., Leckie, J. O. 1997; 7 (4): 535-542

    Abstract

    Questionnaires and diaries, the current methods of human activity data collection, do not accurately capture the detail necessary to quantify exposure incurred through the dermal and non-dietary ingestion routes. Stanford University's Environmental Engineering and Science Program has developed methodologies and software (VideoTraq) for training video translators, determining inter-observer reliability, and translating videotaped micro-activity patterns into computer text files. VideoTraq output files contain duration, in seconds, for each combination of location, activity, and object contacted corresponding to the sequential micro-activities of a videotaped subject's contact boundary (e.g., left hand, right hand, mouth). Such output allows for detailed analyses of micro-activity data, including contact frequency and duration. When coupled with environmental concentrations, these data will allow for more accurate exposure assessments, particularly for the dermal and non-dietary ingestion exposure routes.

    View details for Web of Science ID A1997XW85000008

    View details for PubMedID 9306236

  • Anion-exchange preparation of a U-232 radiotracer for alpha-particle liquid scintillation counting TALANTA Ong, C. G., Leckie, J. O. 1996; 43 (4): 601-605

    Abstract

    Daughter product ingrowths, which could act as analytical interferences, are removed from (232)U(VI) stock solutions prior to use as an alpha-particle emitting radiotracer in conjunction with detection by liquid scintillation counting. The preparative benchtop separation procedure employs elution with HCl through a BioRad AG1-X8 anion-exchange resin column, and fraction collection. The importance of the separation of the (232)U isotope from daughter products, characterized by high recovery, is illustrated by liquid scintillation energy spectra. Rapid ingrowth in the purified fraction also limits the period of time after purification in which the radiotracer is usable.

    View details for Web of Science ID A1996UT76200012

    View details for PubMedID 18966525

  • EFFECT OF PH, NACL, AND COCKTAIL SELECTION ON U-232 LIQUID SCINTILLATION SPECTRA ANALYTICAL CHEMISTRY Ong, C. G., Prasad, A., Leckie, J. O. 1995; 67 (21): 3893-3896