Table of Contents Table of Contents INTRODUCTION 1 PART I SOLID STATE PHYSICS, ELECTRONICS AND OPTICS Section 1 Materials and Fabrication 5 Submicron Structures Technology and Research 7 Chapter 1 Professor Henry i. Smith * * * * 1.1 1.2 1.3 1.4 1.5 1.6 1.7 * 1.8 * 1.9 1.10 1.11 * 1.12 1.13 1 .14 Chapter 2 Subm icron Structures Laboratory .............................................................. Microfabrication at Linewidths of 100 nm and Below ............................ Improved Mask Technology for X-Ray Lithography ...................................................... Study of Electron Transport in Si MOSFETs with Deep-Submicron Channel Lengths ... Studies of Electronic Conduction in One-Dimensional Semiconductor Devices ............. Lateral-Surface-Superlattice and Quantum W ire Arrays in Si ..................................... Study of Surface Superlattice Formation in GaAs/GaAIAs Modulation Doped Field - Effect T ransisto rs ..... ............... ........ ........................... ................................... Study of One-Dimensional Subbands and Mobility Modulation in GaAs/AIGaAs Q uantu m W ires .................................................................... Arrays of Field-Effect-Induced Quantum Dots ........................................................ Planar-Resonant-Tunneling Field-Effect Transistors (PRESTFET) .................................. Submicrometer- Period Transmission Gratings for X-Ray and Atom-Beam S pectrosco py and Interferom etry ............................................................................................ High-Dispersion, High Efficiency Transmission Gratings for Astrophysical . ................... X- Ray Spectroscopy ........................................ ............. Epitaxy via Surface-Energy-Driven Grain Growth ........................... P ub licatio ns ...................................... ............... ......... 7 7 9 10 11 13 Microstructural Evolution in Thin Films of Electronic Materials ................. 23 13 15 15 16 17 17 18 18 Professor Carl V. Thompson * * 2.1 2.2 2.3 2.4 2.5 2.6 2.7 2.8 2.9 Chapter 3 .............................. ............... Coarsening of Particles on a Planar Substrate ................... Epitaxial Grain Growth ........................................ .... . ........ ....... Modeling of Microstructural Evolution in Thin Films ..................... Properties of Grain Boundaries in Zone Melted Silicon Thin Films ................................. Kinetics of Thin Film Silicide Form ation ........................................ ............. Reliability and Microstructures of Interconnects ................................. ....... ...... ................... Focused Ion Beam Induced Deposition ............... Protective Coatings for Integrated Circuits in an in vitro Environment ........................... Publications ............................................................. 23 23 24 24 24 25 25 26 26 Focused Ion Beam Fabrication ....................................... 27 Dr. John Melngailis 3.1 3.2 * ................................................... Focused Ion Beam Fabrication ........................ Tunable Gunn Diode .................................................................................... Sponsored by the Joint Services Electronics Program 27 27 Table of Contents ..................... 28 Light Emission From Tunable Gunn Diodes ............................. Effect of Dose Rate on Activation of Si Implanted in GaAs .......................................... 28 Focused Ion Beam Implantation of GaAs MMICs and MESFETs ................................... 29 29 Doping Gradients in GaAs MESFETs ........................................ .................... CMOS Transistors Fabricated by Focused Ion Beam Implantation ................................ 2 9 a n d Lith o g ra p h y .................................................................... Charge Coupled Devices with Focused Ion Beam Implanted Doping 3.8 .... ............................... ................... 30 G rad ients in the C hannel ............................ .......... ............ 30 Focused Ion Beam Lithography ........................................ 3.9 30 3.10 Focused Ion Beam Exposure Combined With Silylation .......................... ................ 31 3.11 Focused Ion Beam Induced Deposition of Platinum ............................. 3.12 Ion Induced Deposition of Gold, Results and Models for the 2 to ...................32 ......... ..... ......... 10 keV Energy Range ................................. 3.13 Ion Induced Deposition of Gold, Results and Models for the 50 to 32 100 keV Energy Range .............................................................. 3 .1 4 P u b lic a tio n s ............................................................................................................................... 3 3 3.3 3.4 3.5 3.6 3.7 Chapter 4 Chemical Reaction Dynamics at Surfaces ....................................... ....... 35 Professor Sylvia T. Ceyer * * 4.1 4.2 Chapter 5 ................ 35 Dynamics of the Reaction of Fluorine with Si(100) ........................ Dynamics of the Reaction of Fluorine with Fluorinated Si(100) ........................................ 36 Measurement of Electron-phonon Interactions Through Large-amplitude Phonon Excitation ................................................................ 39 Professor Keith A. Nelson * * 5 .1 5.2 Chapter 6 In tro d u c tio n .......................................... ... .................. ... ........................................................ 39 High Repetition-rate Signals and Resonant Responses of Electronic Materials ............ 39 Chemical Beam Epitaxy of Compound Semiconductors ............................... 43 Professor Leslie A. Kolodziejski * * 6.1 6.2 6.3 6 .4 Chapter 7 Chemical Beam Epitaxy Facility ........................................ ...................... Metalorganic Molecular Beam Epitaxy (MOMBE) of ZnSe ........................................... Photon-assisted MOMBE of Wide Bandgap Il-VI Compound Semiconductors ........... P u b lic a tio n s ............................................................................................................................... 43 43 45 46 High-Frequency InAIAs/InGaAs Metal-Insulator-Doped Semiconductor Field-Effect Transistors (MIDFETs) for Telecommunications ........................ 47 Professor Jesus A. del Alamo * * * * 7.1 7.2 7.3 7.4 Chapter 8 .... ............... ..................... ............ ............................ Introduction Strained-channel InAIAs/n - InGaAs MIDFETs ................................................ Orientation Dependence of Mismatched-Insulator InAIAs/n*-InGaAs MIDFETs ......... Publications and Conference Papers ............................................................ 47 47 50 55 Novel Superconducting Tunneling Structures ...................................... 57 ... Professor John M. Graybeal S 8.1 Chapter 9 Project Description ............................................................... 57 Heterostructures for High Performance Devices ........................................ 59 Professor Clifton J. Fonstad, Jr. iv RLE Progress Report Number 133 Table of Contents * * 9 .1 9.2 9.3 9.4 9.5 9.6 9.7 * 9.8 9.9 9.10 * * * 9.11 9.12 9.13 9.14 9.15 9 .1 6 Section 2 Chapter 1 In tro d u c tio n ............................................................................................................................... 59 Computer Controlled Growth of Lattice-Matched InGaAIAs Heterostructures on InP .... 60 InGaAIAs Strained-Layer Heterostructures on 111 GaAs and InP for Optoelectronic Device Applications .......... ............. ................. 60 Molecular Beam Epitaxy of GaAIAs Laser Diode Heterostructures on S ilico n S u bstrates .................................................................................................... . . .... . 6 1 Integration of Vertical Cavity Surface Emitting Lasers on GaAs Integrated Circuits ........ 61 MBE-Grown InGaAIAs/InP Long-Wavelength Laser Diodes for Narrow Linewidth Applications ....... ........................................ 62 Applications for New Three Terminal Laser Diodes with Dynamic Control of Gain and Refractive Index ........................................... 63 Use of Graded Profiles to Improve InGaAIAs/InP Heterojunction Bipolar Transistor Performance ............................................... 63 Applications of Delta-Doping to Heterojunction Bipolar Transistors .............................. 64 Microwave Characterization, Analysis, and Modeling of Emitter-Down Heterojunction Bipolar Transistors ....................................... 64 AlAs Etch-Stop Layers for InGaAIAs/InP Heterostructure Devices and Circuits ........... 65 Three-Terminal n-n-n Quantum-Well-Base, Tunnel-Barrier Devices .............................. 65 Self-Consistent Modeling of Biased Quantum-Well-Base, Tunnel-Barrier Structures .... 66 Infrared Characterization of InGaAs/AIAs/InP Quantum Well Heterostructures ....... . 66 Damage-Free In-Situ UHV Etching and Cleaning of III-V Heterostructures Using M olecular Beams ........................................................... 67 P u b lic atio n s ................................................................................................... ........................ 6 8 Optics and Devices Optics and Quantum Electronics ......................................... 71 .............. 73 Professor Hermann A. Haus, Professor Erich P. Ippen, Professor James G. Fujimoto, Professor Peter A. Wolff, Professor Peter L. Hagelstein, Dr. Sunny Auyang, Dr. Santanu Basu, Dr. Jyhpyng Wang * * * S 1.1 1.2 1.3 1.4 1 .5 1.6 1.7 1.8 1.9 1.10 1.11 Chapter 2 Ultrafast Optics ............ ......................................................... 73 New Ultrashort Pulse Laser Technology ........................................ 82 Femtosecond Processes in Electronic Materials ....................... .............. 86 Femtosecond Studies of Waveguide Devices ........ .............. .................. 88 La ser M e d ic in e ................................................................................................... ................. 9 0 The MIT Short-Wavelength Laser Project: A Status Report ..................... 93 Generalizing Hydrodynamic Transport in Semiconductor Device Modeling ................ 102 Hydrodynamic Calculations ........................................ 102 Infrared Laser Studies ....... ........................................ 103 Approximations to the Single Photon Exchange Interaction ..................... ................... 103 Coherent Neutron Transfer Reactions .................................... 104 Superconducting Electronic Devices ...................................... 107 Professor Qing Hu 2.1 2.2 Section 3 Chapter 1 High Tc Superconducting SQUIDs and M ixers ........................................ Millimeter Wave and Infrared Superconducting Receivers ...................... ............. 107 107 Surfaces and Interfaces 109 Statistical Mechanics of Surface Systems and Quantum-Correlated System s ................................................ . . ................................................... 111 Professor A. Nihat Berker * * 1.1 1.2 Introduction . .................................................................................. Finite-Temperature Properties of Vicinal Si(100) Surfaces ....................................... 111 111 Table of Contents * * 1.3 1.4 * 1.5 Chapter 2 Impurity-Induced Critical Behavior ........................................ Monte Carlo Mean-Field Theory and Frustrated Systems in Two and T h re e D im e n s io n s .................................................................................................................... Q uantum System s ............................................................... 112 Synchrotron X-Ray Studies of Surface Disordering .................................. 115 112 113 Professor Robert J. Birgeneau * * * * * 2 .1 2.2 2.3 2.4 2 .5 Chapter 3 ......................... 1 15 In tro d u c tio n .............................................................................................. 115 M etal Surface Studies .............................................................. Sem iconductor Surface Studies ............................................................ 116 ........ 117 ................................................ Stepped Si(111) Surfaces 1 17 P u b lic a tio n s ............................................................................................................................. Semiconductor Surface Studies ..................................... 119 Professor John D. Joannopoulos * * * 3 .1 3.2 3.3 Chapter 4 119 In tro d u c tio n ............................................................................................................................. 119 ............................................................................. Heteroepitaxy of M odel icroscopic M ................... 121 Finite Temperature Phase Diagram of Vicinal Si(100) .................... Single Electron Transistors ............................................................................ 125 Professor Marc A. Kastner S 4 .1 Chapter 5 P roject Desc rip tio n .................................................................................................................. 125 Coulomb Blockade in Narrow MOSFETs ..................................... 129 Professor Patrick A. Lee S 5 .1 Chapter 6 P roject Desc rip tio n .................................................................................................................. 1 29 Epitaxy and Step Structures on Semiconductor Surfaces ......................... 131 Professor Simon G.J. Mochrie S 6.1 131 Project Description ............................................................... PART II APPLIED PHYSICS Section 1 Atomic, Molecular and Optical Physics 135 Quantum Optics and Photonics ................................................................... 137 Chapter 1 Professor Shaoul Ezekiel 1.1 1.2 1.3 1.4 Chapter 2 Applications of Stimulated Brillouin Fiber Lasers ........................................ Stim ulated Brillouin Fiber Laser Gyroscope ................................................................. Structures Much Shorter and Longer Than Optical Wavelengths Predicted in the Force on a Three-Level System ...................................... Phase-Locked, Closed-Loop Three-Wave Mixing Demonstrated in Atomic Sodium via Excitation of Microwave Dressed States With Optical Frequencies ...................... Basic Atom ic Physics ................................. ......... . .................................... 137 139 141 142 145 Professor Daniel Kleppner, Professor David E. Pritchard * * vi 2.1 2.2 2.3 145 The Diamagnetic Rydberg Atom .......................................... 149 .................. ...... Constant Rydberg the of Measurement Millimeter-Wave Frequency ......................... 152 Precision Mass Spectroscopy of Ions ................................ RLE Progress Report Number 133 Table of Contents * 2.4 2.5 Chapter 3 Atom Interferometry ............................................... Cooling and Trapping Neutral Atom s ............................................................ ......... Small Angle X-Ray and Neutron Scattering - Its Application to Supramolecular Solutions ....................................... 154 157 161 Professor Sow-Hsin Chen 3.1 3.2 3.3 3.4 3.5 3.6 3.7 Section 2 Chapter 1 A New Inversion Algorithm for Obtaining Density Profiles of Thin Films From X-Ray and Neutron Reflectivity Data ........................................ Interlayer Diffusion in Langm uir-Blodgett Films ........................................ Structure of a Protein/SDS Complex in Low Ionic Strength Solution Studied by Small Angle Neutron Scattering ................................ Isotope Effect in Phase Separation of a Lipid/Water Micellar System .......................... Measurement and Interpretation of Counterion Distribution Around Cylindrical Polyelectrolytes ............................................ Aggregation Behavior and Phase Transition of Semifluorinated n-Alkanes in Hydrocarbons and Fluorocarbons ........................................ Light Scattering From Dense Percolating Microemulsions ....................................... Plasma Physics Plasma Dynamics ........................................ 161 162 162 163 164 165 166 169 171 Professor George Bekefi, Professor Abraham Bers, Professor Bruno Coppi, Professor Miklos Porkolab, Professor Jonathan S. Wurtele, Dr. Ronald C. Englade, Dr. Stefano Migliuolo, Dr. Abhay K. Ram, Dr. Linda E. Sugiyama 1.1 1.2 1.3 1.4 Section 3 Chapter 1 * 1.1 1.2 1.3 1.4 1.5 1.6 1.7 1.8 Section 4 C hapter 1 Relativistic Electron Beams ........................................ Plasma Wave Interactions - RF Heating and Current Generation .................................. Physics of Thermonuclear Plasmas ........................................ Versator II Plasma Research Program .................. ............................. 171 177 182 189 Electromagnetics 193 Electromagnetic Wave Theory and Applications ..................................... 195 Professor Jin Au Kong, Dr. Sami M. Ali, Dr. Robert T. Shin, Dr. Ying-Ching E. Yang Electrom agnetic W aves in M ultilayer M edia ....................................... .................. Remote Sensing of Earth Terrain ........................................ SAR Image Interpretation and Simulation ................................ ........... M icrowave and Millimeter W ave Integrated Circuits ........................................ High-Speed Integrated Circuit Interconnects ........................................ ILS/M LS Frequency Management Assessment ......................................... Superconducting Electronics .......................................... Publications and Conference Papers ........................................ 195 200 205 208 211 212 214 215 Radio Astronomy 219 Radio A stronom y ......................................................................................... 221 Professor Bernard F. Burke, Professor David H. Staelin, Dr. Jacqueline N. Hewitt, Dr. Philip W. Rosenkranz 1.1 1.2 1.3 1.4 1.5 Galactic and Extragalatic Research .......................................... Radio Interferometry of Nearby dMe Stars ........................................ Tiros-N Satellite Microwave Sounder ............................................. Non-Thermal Radio Emission from the Jovian Planets ........................ High-Resolution Passive Microwave Imaging of Atmospheric Structure ..................... 221 225 225 226 226 Table of Contents 1.6 1.7 1.8 227 Characterization of Dolphin Whistles ............ ......................... 227 .... Rapid Precision Net-Form Manufacturing .............................. 228 .............................. Unit Sounding Microwave Earth Observing System: Advanced PART III SYSTEMS AND SIGNALS Section 1 Digital Signal Processing Chapter 1 Digital Signal Processing Research Program 231 ............................................ 233 Professor Alan V. Oppenheim 233 In tro d u c tio n .................................................................... Estimation Spectra Wave Directional for Method Likelihood A True Maximum 233 and Matched-field Source Localization ....................................... Performance Bounds on the Passive Localization of a Moving Source 1.3 234 ...................................... ...................... fo r O c e a n A c o u stic s ................................ 234 Fault-Tolerant Algorithms and Architectures for Digital Signal Processing ................. 1.4 ................... 235 Fault-Tolerant Round Robin A/D Converter System ................................ 1.5 Implementation and Evaluation of a Dual-Sensor Time-Adaptive EM Algorithm ....... 235 1.6 Estimation and Correction of Geometric Distortions in Side-Scan Sonar Images ....... 236 1.7 236 Signal Processing Applications of Chaotic Dynamical Systems ................................ 1.8 236 ........................... Scenarios Multidimensional High-Resolution Direction Finding for 1.9 237 .................................................. Tomography Acoustic Ocean for Processing Signal 1.10 1.11 Structure Driven Multiprocessor Compilation of DSP and Linear Algebra . ............................................................ 2 37 Pro ble m s ...................................................................... Using Minmax Development Processor Array Non-planewave Robust 1.12 238 De s ig n C rite ria .................................................................. 239 ..................................... Systems 1.13 Shadowing and Noise Reduction in Chaotic 239 .... .............................. Delay Group Negative with Filters 1.14 Causal 240 1.15 Signal Prediction Based on Nonlinear and Chaotic System Models ........................... 240 ........................... Measurements 1.16 Signal Enhancement Using Single and Multisensor 241 .................. ..................... Signals Fractal of Processing and Analysis, 1.17 Synthesis, 241 1.18 A ctive Noise Cancellation .............................................. 1 .1 1.2 Chapter 2 Speech Processing Research Program ..................................................... 243 Professor Jae S. Lim 2 .1 2.2 2.3 2.4 2.5 2.6 243 In tro d u c tio n .................................................................... 243 .... Development of a 1.5 Kbps Speech Vocoder ............................. 243 .... A New Method for Representing Speech Spectrograms .................... 244 ........................................ odel M Speech Excitation Dual A 244 Speech Enhancement Techniques for the Dual Excitation Vocoder Model ................. 245 ... ..................... Synthesis Nonlinear and Statistical Approach to Speech Chapter 3 247 Advanced Television Research Program ........................................... Professor Jae S. Lim, Professor William F. Schreiber 3 .1 3 .2 3.3 3.4 3.5 3.6 3.7 3.8 3.9 viii 2 47 ........... ....... In tro d u c tio n .................................................................... 2 47 A T R P F a c ilitie s .................................................................. Coding of the Motion Compensated Residual for an All-Digital HDTV System ........ 248 248 Motion-Compensated Vertico-Temporal and Spatial Interpolation ............................ 248 .... .................. Receiver-Compatible Adaptive Modulation for Television . .................. 249 Adaptive Amplitude Modulation for Transform Coefficients .. 250 ... Transform Coding for High Definition Television .......................... 250 Adaptive Spatio-tem poral Filtering ........................................ 251 .... Signal Processing for Advanced Television Systems ........................ RLE Progress Report Number 133 Table of Contents 3.10 3.11 3.12 3.13 Chapter 4 4.1 Chapter 5 MIT Channel Compatible System ....................................... Subband Coding for Channel-Compatible Transmission of High-Definition Television ................ .............................. ................ .................. . Hybrid Analog/Digital Representation of Analog Signals ........................................ Channel Equalization and Interference Reduction Using Adaptive Amplitude Modulation and Scrambling ........................................... Computer-Aided Fabrication System Structure ...................................... Professor Donald E. Troxel CAFE - The MIT Computer Aided Fabrication Environment .............. ............ 251 251 252 253 255 ...... 255 Optical Propagation and Communication ...................................... 257 Professor Jeffrey H. Shapiro, Dr. Robert H. Rediker, Dr. Ngai C. Wong 5.1 5.2 5.3 5.4 5.5 5.6 Chapter 6 Introduction ..... ......... ................................................................... ............. Squeezed States of Light ............ ............ ..... .................. Optical Frequency Division ........................................... Laser Radar System Theory ........................................... Fiber-Coupled External-Cavity Semiconductor High Power Laser ................................ Analog Processing of Optical Wavefronts Using Integrated Guided-Wave Optics ........ 257 257 259 260 261 262 Custom Integrated Circuits ........................................ 265 Professor Jonathan Allen, Professor John L. Wyatt, Jr., Professor Srinivas Devadas, Professor Jacob White 6.1 6.2 6.3 6.4 6.5 6.6 6.7 6.8 6.9 6.10 Custom Integrated Circuits ............................................ 265 The MIT Vision Chip Project: Analog VLSI Systems for Fast Image Acquisition and Early Vision Processing ........................................... 267 Techniques for Logic Synthesis, Verification and Testing ....................................... 273 Mixed Circuit/Device Simulation ................................................ 280 Simulation Algorithms for Clocked Analog Circuits .................................................... . 281 Parallel Simulation Algorithms for Analog Array Signal Processors ............................... 281 Numerical Simulation of Short Channel MOS Devices .................. ........... ..... 282 Efficient 3-D Capacitance Extraction Algorithms ............................................... 283 Parallel Numerical Algorithms .......................................... 283 Integrated Circuit Reliability ........................................ 284 PART IV LANGUAGE, SPEECH AND HEARING Section 1 Speech Communication Chapter 1 1.1 1.2 1.3 1.4 1.5 1.6 1.7 1.8 1.9 1.10 1.11 Speech Com m unication .............................................................................. Professor Kenneth N. Stevens, Dr. Joseph S. Perkell, Dr. Stefanie Shattuck-Hufnagel Introduction ...................................................... Models, Theory, and Data in Speech Physiology ............ .......... .................. Speech Synthesis ............................................................................ . .. ........ ........ Speech Production of Cochlear Implant Patients ............................ Phonatory Function Associated with Misuse of the Vocal Mechanism ........................ Studies of Acoustics and Perception of Speech Sounds ................................ Speech Production Planning .......................................... Models Relating Phonetics, Phonology, and Lexical Access ................ .............. .... Other Research Relating to Special Populations .................................... Facilities ....... ... ............................................................ ............................. Publications .... ....... ...................................................................... ............ 287 289 289 290 291 291 292 294 297 298 299 300 300 Table of Contents Section 2 Chapter 1 1 .1 1.2 1.3 1 .4 1 .5 1.6 1.7 1.8 1.9 1.10 1 .1 1 Section 3 Chapter 1 1 .1 1.2 1 .3 1.4 1.5 1 .6 1.7 Section 4 C hapter 1 303 Sensory Communication Sensory Communication ........................................................................... Professor Louis D. Braida, Nathaniel I. Durlach, Dr. William M. Rabinowitz, Dr. Charlotte M. Reed, Dr. Patrick M. Zurek 305 ........................... In tro d u c tio n .............................................................................................. Hearing A id Research ..................................................................................... Multimicrophone Hearing Aids .......................................... Co ch lear Pro stheses ....................................................................................... B in a u ra l Hea rin g ......................................................................................... Clinical Applications of Binaural Hearing ................................................................ Tactile Communication of Speech ......................................... Super Auditory Localization for Improved Human-Machine Interfaces ....................... Research on Reduced-Capability Human Hands ........................................................ Skin Biom echanics ................................................................ .......................... P u b lic atio n s .............................................................................................. 305 3 05 307 308 309 310 310 312 313 314 315 Auditory Physiology 317 319 Signal Transmission in the Auditory System ..................................... Professor Lawrence S. Frishkopf, Professor Nelson Y.S. Kiang, Professor William T. Peake, Professor William M. Siebert, Professor Thomas F. Weiss, Dr. Betrand Delgutte, Dr. Donald K. Eddington, Dr. John J. Guinan, Dr. Robert A. Levine 3 19 In tro d u c tio n ....................................... ..................................................................................... 319 .................... Signal Transmission in the External and Middle Ear ..................... 321 Coch lear M ec han ism s ....................................................................................... 324 .............................................................. Reflex Middle-Ear Muscle 325 Cochlear Efferent System ............................................... 3 26 C o ch lear Im p la nts ........................................................................................ and Hearing Binaural Between Relationships the for Anatomical Basis Brainstem Auditory Evoked Potentials in Humans ........................................ 328 Linguistics ........................................................................... Linguistics ........................................... ...................................................... 331 333 Professor Noam Chomsky, Professor Morris Halle 1 .1 1.2 x Intro d uc tio n ............................................................................................................................. .................... Abstracts of Doctoral Dissertations ................... RLE Progress Report Number 133 333 333 Table of Contents APPENDICES Appendix A RLE Publications and Papers Presented ...................................... A.1 A.2 A.3 A.4 A.5 A.6 Meeting Papers ..... ........ ............................................................ ............. Journal Articles .................................................................................................. . Books/Chapters in Books ............................................ RLE Publications ................ .. .................................................. Theses ........ ....................... ........................... M iscellaneous ..... ........ ............................................................ ................ Appendix B Current RLE Personnel ........................................ Appendix C RLE Research Support Index ....................................... PROJECT STAFF AND SUBJECT INDEX ...................................... 341 341 354 366 368 368 370 371 377 381