TABLE OF CONTENTS
GENERAL PHYSICS
I.
Molecule Microscopy
Prototype Scanning Desorption Molecule Microscope (SDMM)
Localized Thermal Desorption by Electron-Beam Heating
II.
III.
V.
11
21
Physical Electronics and Surface Physics
29
Atomic Resonance and Scattering
21
29
31
Superradiance and Coherences in Small Systems
Investigations of High-Lying Levels of Atoms
31
New Techniques for Detection of Radiation
Optical Frequency Standard
32
Quantum Electronics
Laser Applications
Observation of Magnetic Octopole and Scalar Spin-Spin
Interactions in 12 Using Laser Spectroscopy
Measurement of the Spectrum of Spontaneous Emission
Induced by Monochromatic Excitation
Gaseous Lasers
32
37
37
37
38
39
39
High-Pressure CO 2 Laser
40
Laser Locking over a "Wide" Frequency Range
Short-Pulse Saturation of High-Pressure SF 6
Transient Buildup of Fast Saturable Absorber Mode Locking
Infrared Instrumentation and Astronomy
Measurement of the Isotropy of the Cosmic Background
Radiation in the Far Infrared
Infrared Heterodyne Detection
PR No. 116
31
Determination of Electron Density from Free-Free
Absorption Measurements of a CO 2 Laser Beam
Nonlinear Phenomena
VI.
1
Electron Optics
Modular Programmable Electron Beam System for Spot
Irradiation in Surface Research
Interaction of Gases with Solids
IV.
1
42
42
43
46
51
51
52
CONTENTS
VII.
Microwave and Millimeter Wave Techniques
Low-Temperature Millimeter Wave Receivers:
Cryogenic Diodes
Multiple Microwave Solid-State Devices
53
Low-Barrier
Pressure Broadening Calculations Applied to Microwave Absorption
of Oxygen and Water Vapor in the Atmosphere
Very Long Baseline Interferometry: 6-cm Observations of Radio
Galaxies over a 228-km Baseline
VIII.
IX.
53
54
55
57
61
Electrodynamics of Media
Comparison of the Horizontal Magnetic Dipole with the Horizontal
Electric Dipole in Geophysical Subsurface Probing
61
Effects of Scattering and Nonuniform Temperature Distributions
on Brightness Temperature in Remote Sensing
Interpretation of Remote Sensing Data
63
Calculation of the Brightness Temperature of an Inhomogeneous
Medium with the Fluctuation-Dissipation Approach
70
Transport Phenomena in Solids
Surface Thermal Energy Transport
68
73
73
PLASMA DYNAMICS
X.
Plasma Dynamics
Experimental Studies - Waves, Turbulence, and Radiation
Neutral Beam Injection Systems
Externally Induced "Strong Turbulence"
General Theory
Parametric Excitation of Electrostatic Ion Cyclotron
Modes with Arbitrary klai
PR No. 116
77
78
78
86
94
94
Parametric Downconversion from Lower Hybrid Waves
to Kinetic Ion Cyclotron Harmonic Waves
107
Whistler Wave Field Structure inside a Linear Density
Profile
117
Anomalous RF Emission and Ion Heating by Microinstabilities
in Tokamaks
Coherent Wave-Wave Coupling in Magnetized Vlasov Plasma
128
139
Wave-Packet Trapping and Resonance Broadening in
Wave Cascading Processes
149
Temporally Growing Eigenmodes of a Finite Inhomogeneous
Parametric System
158
CONTENTS
COMMUNICATION SCIENCES AND ENGINEERING
XI.
XII.
Detection and Estimation Theory
Adaptive Array Processing for Passive Signals
175
Digital Signal Processing
177
Enhancement of Speech by Adaptive Filtering
177
Amplitude Filtering Using a Time-Variable Transformation
181
XIII. Speech Communication
189
Perception of Segment Duration in Sentence Contexts
An Experiment on "Phonetic Adaptation"
Some Speaker-Identifying Features Based on Formant Tracks
Computer-Aided Signal Processing: Higher Level Dialogues
for Processing Schemata Specification
Preliminary Report on Longitudinal Intensive Observation of
the Acquisition of English as a First Language
XIV.
XV.
XVI.
175
Linguistics
189
206
211
224
225
229
Using Time-Compressed Speech to Measure the Effects of
Verb Complexity
229
Using Time-Compressed Speech to Measure the Effects of
Ambiguity
2 35
An Experimental Study of Implication and Negation
241
Cognitive Information Processing
247
Audio Response Terminals
247
Font-Independent Character Recognition
248
A Parametric Representation of Roman Printed Fonts
250
Neurophysiology
263
Optic Projections of the Toad (Bufo marinus) as Seen with
Autoradiography
263
AChE Activity and ACh Synthesis in the Optic Tectum of the
Toad Bufo marinus: Probable Identification of an Optic
Nerve Neurotransmitter
266
Explanation of Intermittent Conduction Based on ActivityDependent Changes in Nerve Threshold
273
Some Effects of Temperature Changes on the Threshold of
Sciatic-Nerve Fibers
281
Evolutionary Constraints on the Dimensionality of Color Space
Synaptic Organization of the Sternarchus Electromotor System
288
Regional Morphology of Central Myelinated Axons
303
PR No. 116
v
302
CONTENTS
Publications and Reports
307
Personnel
316
Author Index
323
Research Support Index
PR No. 116