A newly developed person-portable gas chromatography-mass spectrometry (GC-MS) system was used to analyze several solvent standards, contact cement, paint thinner, and polychlorinated biphenyl samples. Passive solid phase microextraction sampling and fast chromatography with a resistively heated low thermal mass GC column were used. Results (combined sampling and analysis) were obtained in <2 min for solvent, contact cement, and paint thinner samples, and in <13 min for the polychlorinated biphenyl sample. Mass spectra produced by the small toroidal ion trap detector used were similar to those produced with heavily used transmission quadrupole mass spectrometers for polychlorinated biphenyl compounds, simple alkanes, and cycloalknes, while mass spectra for benzene and the ketone compounds analyzed showed evidence for ion/molecule reactions in the ion trap. For one of the contact cement samples analyzed, no evidence was found to indicate the presence of n-hexane, although the relevant material safety data sheet listed this ingredient. Specific chemical constituents corresponding to a potentially wide range of petroleum distillate compounds were identifiable from GC-MS analyses. The possibility for an improved basic characterization step in the exposure assessment process exists with the availability of fast, person-portable GC-MS, although work is needed to further refine this tool and understand the best ways it may be used.

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In November of 2000, the Deputy Under Secretary of Defense for Science and Technology Sensor Systems (DUSD (S&T/SS)) chartered the Automatic Target Recognizer Working Group (ATRWG) to develop guidelines for sanctioned Problem Sets. Such Problem Sets are intended for development and test of Automatic Target Recognition (ATR) algorithms and contain comprehensive documentation of the data in them. A Problem Set provides a consistent basis for examining ATR performance and growth. Problem Sets will, in general, serve multiple purposes. First, they will enable informed decisions by government agencies sponsoring ATR development and transition. Problem Sets standardize the testing and evaluation process, offering a consistent assessment of ATR performance. Second, they will measure and guide ATR development progress within this standardized framework. Finally, they quantify the state-of-the-art for the community. Problem Sets provide clearly defined operating condition coverage. This encourages ATR developers to consider these critical challenges and allows evaluators to assess over them. The widely distributed development and self-test portions, along with a documented disciplined methodology, permit ATR developers to address critical issues and describe their accomplishments, while the sequestered portion permits government assessment of state-of-the-art and of transition readiness. This paper discusses the elements of an ATR Problem Set as a package of data and information that presents a standardized ATR challenge relevant to one or more scenarios. The package includes training and test data containing targets and clutter, truth information, required experiments, and a standardized analytical methodology to assess performance. Downloaded From: http://proceedings.spiedigitallibrary.org/ on 06/16/2016 Terms of Use: http://spiedigitallibrary.org/ss/TermsOfUse.aspx Proc. of SPIE Vol. 4726 313 Downloaded From: http://proceedings.spiedigitallibrary.org/ on 06/16/2016 Terms of Use: http://spiedigitallibrary.org/ss/TermsOfUse.aspx