CONTENTS -- Foreword -- Water Sensing and Monitoring Sessions -- Operational and Laboratory Verification Testing of a Heuristic On-Line Water Monitoring System for Security D. Kroll and K. King -- 1. Our Water Systems are Vulnerable -- 2. Distribution System Monitoring -- 3. The Hach HST Approach -- 4. Battelle EPA ETV Verification Testing -- 4.1 Accuracy6 -- 4.2 Inter-unit Reproduceability6 -- 4.3 Contaminant Injection6 -- 4.4 Long-term Deployment6 -- 4.5 Inter-Unit Reproduceablity6 -- 4.6 Contaminant Classifica tion 6 -- 5. ECBC Testing -- 6. Real World Testing -- 7. Conclusion -- References -- Real-Time On-Line Monitoring of Drinking Water for Waterborne Pathogen Contamination Warning J. A. Adams and D. McCarty -- 1. Introduction -- 2. Microbiology and Emerging Technologies -- 3. MALS History and Technology -- 4. BioSentry System Overview -- 4.1. System Operation -- 5. Relationship Between Time, Detection Limits, and Interferences -- 6. First Generation System Development and Performance -- 7. BioSentryTM in Operation -- 7.1. Factory Calibration -- 7.2. System Installation and Operation -- 7.3. Alert Response -- 7.4. Emergency Planning and Response -- 8. Applications -- 9. Security Protection Case History -- 10. Next Generation BioSentry -- 11. Summary and Current Status -- REFERENCES -- Chip-Size Wavelength Detectors O. Schmidt, P. Kiesel, M. Bassler and N. Johnson -- 1. Introduction -- 1.1. Application of chip-size wavelength-shift detectors in optical sensing -- 1.2. Application of chip-size spectrometers in lab-on-a-chip devices -- 2. Concept of Chip-size Wavelength Detectors -- 2.1. Linear variable filter transmission properties -- 2.2. Fabrication of inhomogeneous coatings -- 3. Wavelength-Shift Detection -- 3.1. Sub-pm wavelength-shift detection -- 3.2. Broad-band wavelength-shift detection -- 4. Spectrometer-on-a-Chip.

4.1. Description of prototype -- 4.2. Calibration and reference line -- 4.3. Large area spectroscopy -- 5. Conclusion -- Acknowledgements -- References -- Class Identification of Bio-Molecules Based on Multi-Color Native Fluorescence Spectroscopy M. Bassler, O. Schmidt, P. Kiesel and N. M. Johnson -- 1. Introduction -- 2. Experimental -- 2.1. Fluorescence measurement setup -- 2.2. Native fluorescence spectra -- 3. Class identification -- 3.1. Data normalization -- 3.2. Meaningful axes -- 3.3. Data analysis -- 3.4. Multidimensional classification -- 4. Summary -- 5. Acknowledgments -- References -- Chesapeake Bay Water Quality Monitoring Using Satellite Imagery B. Ramakrishna, C-I Chang, B. Trou and J. Henqemihle -- 1. Introduction -- 2. Water Quality Metrics -- 2.1. Secchi Depth Transparency -- 2.2. Chlorophyll - a -- 3. Regression Analysis to link satellite imagery to ground samples -- 3.1. Data Collection and Pre-processing -- 3.2. Secchi Depth Transparency (SDT) Mapping -- 3.3. Chlorophyll (Chl-a) Mapping -- 4. Experiments -- 4.1. Study Area -- 4.2. Secchi Depth Transparency (SDT) and Chlorophyll-a Mapping -- 5. Conclusion -- Acknowledgements -- References -- LIF Detection of Trace Species in Water Using Different UV Laser Wavelengths A. V. Sharikova and D. K. Killinger -- 1. Introduction -- 2. Experimental Apparatus -- 3. LIF Data of Water Samples -- 4. LIF Data of Bacillus Globigii (BG) Endospores and VX Simulant -- 5. Analysis and Conclusions -- 6. Acknowledgments -- References -- Development of Materials and Sampling Methods for IR-Based Detection of Toxic Compounds in Water B. J. Ninness, L. D. Doucette, B. McCool and C. P. Tripp -- 1. Introduction -- 2. Synthesis of Mesoporous Silica Films -- 2.1 Experimental -- 3. Surface Chemistry Modification of Mesoporous Materials -- 3.1 Experimental.

4. Development of Batch & Continuous Sampling Methods -- 4.1. Batch detection of VX surrogate phosmet. -- 4.2. Continuous detection of VX surrogate phosmet -- 4.3 Detection sensitivity and reproducibility -- 5. Pathway To Achieve Lower Detection Limits -- 6. Conclusions -- 7. Acknowledgements -- References -- THz Spectroscopy of Proteins in Water: Direct Absorption and Circular Dichroism J. Xu, K. W. Plaxco and S. J. Allen -- 1. Introduction -- 2. Terahertz Direct Absorption Spectroscopy -- 3. Terahertz Circular Dichroism Spectroscopy -- 3.1. Simple Physical Model -- 3.2. Terahertz Circular Dichroism Spectrometer -- 3.3. Magnetic Terahertz Circular Dichroism in Semiconductors -- 3.4. Terahertz Circular Dichroism in Solvated Biopolymers -- 4. Conclusion and Direction -- Acknowledgement -- References -- A SERS-Based Analyzer for Point and Continuous Water Monitoring of Chemical Agents and Their Hydrolysis Products S. Farquharson and F. E. Inscore -- 1. Introduction -- 2. Experimental -- 3. Results and Discussion -- 3.1. Cyanide -- 3.2. HD and TDG -- 4. Conclusions -- 5. Acknowledgements -- References -- Reagentless Bio-Sampling Methods for IR Detection L. D. Doucette, H. Li, B. J. Ninness and C. P. Tripp -- 1. Background -- 2. Spore Surface Charge Characteristics -- 3. E-Field Spore Collection Methods for IR Detection -- 3.1 Method 1: Polymer + metal oxide coatings on ATR crystals -- 3.2 Method 2: E-Field Assisted ATR-FTIR -- 4. Spore Identification via PCA Classification Methods -- 5. Conclusions -- 6. Acknowledgements -- 7. References -- PreConcentration of Microorganisms into a Tiny Volume of Liquid for Enhanced Spectral Detection S. Zaromb, D. Martell, N. Schattke and G. Hankins -- 1. Introduction -- 2. Background -- 3. Results -- 3.1 Back Flushing with BG Spores -- 4. CONCLUSIONS -- 5. REFERENCES -- Frontier Session.

Programmable Adaptive Spectral Imagers for Mission-Specific Application in Chemical/Biological Sensing N. Goldstein, P. Vujkovic-Cvijin, M. Fox, S. Adler-Golden, J. Cline, B. Gregor, J. Lee, A. C. Samuels, S. D. Higbee, L. S. Becker and T. Ooi -- 1. Introduction -- 2. Instrument Concept -- 3. Instrument Design for a Passive Sensor Based on Adaptive Spectral Imager with a Two-Dimensional Focal Plane Array -- 4. Experimental Verification -- 5. Conclusions -- 6. References -- Design & Optimization of an I-RTD Hybrid THz Oscillator Based Upon In1-x GaxAs/GaSby As1-y Heterostructure Systems W. Zhang, D. Woolard, E. Brown, B. Gelmont and R. Trew -- 1. Introduction -- 2. The Hetero-structures -- 3. The Transport Physics -- 3.1. Six-band Pikus-Bir Hamiltonian -- 3.2. Equations for Strained & Unstrained Layers -- 3.3. Conduction Band Transport -- 3.4. Interband Tunneling -- 3.5. Optical Discharging -- 4. Simulation Results -- 5. Conclusions -- References -- Study of Transport and Devices Based on the Photo-Excited Two-Dimensional Electronic System R. G. Mani -- 1. Experimental Summary -- 2. Terahertz Sensing -- 3. Novel Terahertz (THz) Detector -- 4. Acknowledgments -- 5. References -- Terahertz-Based Detectors Using Cold-Atom Optics F. J. Crowne, W. M. Golding and C. Hazelton -- 1. Introduction -- 2. Coherence -- 3. Magnetic Trapping -- 4. Detection of Low Gas Concentrations by Electromagnetic Transparency -- 5. Detection Modalities based on the Josephson Effect -- 6. Conclusions -- References -- Detection of Gaseous Effluents from Airborne LWIR Hyperspectral Imagery Using Physics-Based Signatures D. W. Messinger, C. Salvaggio and N. M. Sinisgalli -- 1. Introduction -- 2. Physics-Based Target Model -- 3. Detection Algorithm -- 4. Test Data -- 5. Results -- 6. Summary -- Acknowledgements -- References.

Nonlinear Chemical Plume Detection Using Kernel-Based Matched Subspace Detectors H. Kwon, N. M. Nasrabadi and P. Gillespie -- 1. Introduction -- 2. Kernel-based Learning and Kernel Trick -- 3. Linear MSD and Kernel MSD -- 3.1. Linear MSD -- 3.2. Linear MSD in the Feature Space and its Kernel Version -- 4. OSP and Kernel OSP Algorithms -- 4.1. Linear spectral mixture model -- 4.2. OSP in feature space and its kernel version -- 5. Linear SMF and Kernel Spectral Matched Filter -- 5.1. Linear Spectral Matched Filter -- 5.2. SMF in Feature Space and its Kernel Version -- 6. Adaptive Subspace Detector and Kernel Adaptive Subspace Detector -- 6.1. Linear ASD -- 6.2. ASD in the Feature Space and its Kernel Version -- 7. Experimental Results -- 7.1. Illustrative Toy Examples -- 7.2. Hyperspectral Images -- 8. Conclusions -- References -- Vibrational Spectroscopy of Chemical Agents Simulants, Degradation Products of Chemical Agents and Toxic Industrial Compounds S. P. Hernández-Rivera, L. C. Pacheco-Londoño, O. M. Primera-Pedrozo, O. Ruiz, Y. Soto-Feliciano and W. Ortiz -- 1. Introduction -- 2. Experimental -- 2.1. Materials and Reagents -- 2.2. Raman Experiments -- 2.3. Infrared Experiments -- 2.3.1. KBr Cells Analysis -- 2.3.2. IR Surface Analysis -- 2.3.3. Gas Phase IR Analysis -- 3. Results -- 3.1. Raman Spectroscopy Measurements -- 3.2. Infrared -- 3.2.1. Comparison of Theoretical IR spectra of CWA with CWA simulants, CWAs degradation products -- 3.2.2. Surface detection -- 4. Conclusions -- 5. Acknowledgements -- References -- Hyperspectral and Polarization Imaging with Double-Transducer AOTFS for Wider Spectral Coverage N. Gupta -- 1. Introduction -- 2. Background -- 3. Theory of operation -- 4. Filter parameters -- 5. Imaging experiments and results -- 6. Discussion and conclusion -- References.

Deep-UV Based Acousto-Optic Tunable Filter for Spectral Sensing Applications N. S. Prasad.