A new technique of dual-frequency Doppler-lidar measurement is investigated. This technique is based on the use of a coherently locked, tunable, dual-frequency laser source and is shown to accurately measure velocities as small as 26 mum/s. It is generated by exploiting the nonlinear dynamics of a semiconductor laser through a proper combination of optical injection and operating conditions.

R. Eric Phelts, Ph.D., is a research engineer in the Department of Aeronautics and Astronautics at Stanford University. He received his B.S. in Mechanical Engineering from Georgia Institute of Technology in 1995, and his M.S. and Ph.D. in Mechanical Engineering from Stanford University in 1997 and 2001, respectively. His research involves signal deformation monitoring techniques and analysis fo...

In this paper the implementation aspects of decoding digital DTMF and R2 signalization tones are analyzed. First, a short review of specifications for DTMF and R2 signalization, proposed by ITU-T is made, following by short review of decoding techniques applied in practice. Finally, a new computationally efficient method is proposed and experimentally verified. This method has distinct advantag...

In this paper, a new method for the decoding of DTMF signals is proposed. The approach, which applies the Arithmetic Fourier Transform, is more efficient, in terms of computational complexity, than existing techniques. Theoretical aspects and features that determine the accuracy and the complexity of the proposed method are discussed.

Status of this Memo This document specifies an Internet standards track protocol for the Internet community, and requests discussion and suggestions for improvements. Please refer to the current edition of the "Internet Official Protocol Standards" (STD 1) for the standardization state and status of this protocol. Distribution of this memo is unlimited. Abstract This memo describes the full set...

The effects of word frequency were examined for Japanese Kanji and Katakana words in 6 experiments. The sizes of frequency effects were comparable for Kanji and Katakana words in the standard lexical decision task. In the standard naming task, the frequency effect for Katakana words was significantly smaller than that for Kanji words. These results were consistent with the lexical-selection acc...

The goal of our study is twofold. First, the results of two approaches in a tone annotation task are presented: a manual approach provided by the system MISTRAL+ and an automatic approach provided by the system PROSOTRAN. Second, an attempt is made here to determine the number and the patterns of the Mo Piu language tones with respect to the pitch slope and the tone level. It is found that both...