MODERN PROBLEMS IN ACOUSTICS

Inverse Problems in Underwater Acoustics

The paper presents an overview of the inverse problems associated with applications of underwater acoustics. The problems are classified into four main categories, according to the recoverable quantities : Acoustic source localization, bottom identification, ocean acoustic tomography and target recognition. The paper gives emphasis to the three first categories, and includes methods to solve th...

Modern Problems in Psychiatry

case insucffiient. Drs. Orr and Rows deserve full recognition of their masterly rendering into English. The language of the author is so concise, absolute precision is so vital in expressing intelligibly his subtle and involved reasoning, the intimate knowledge of the subject treated is so essential, that exceptional abilities have been required in the work of translation. This production of Lu...

Modern Problems in Psychiatry

Quantitative Thermo-acoustics and related problems

Thermo-acoustic tomography is a hybrid medical imaging modality that aims to combine the good optical contrast observed in tissues with the good resolution properties of ultrasounds. Thermo-acoustic imaging may be decomposed into two steps. The first step aims at reconstructing an amount of electromagnetic radiation absorbed by tissues from boundary measurements of ultrasounds generated by the ...

Psychology and Modern Problems

Modern Problems. Edited by J. A. Hadfield, M.A., M.B., Ch.B. University of London Press. 5/-. In this volume is published a series of lectures held at the Institute of Medical Psychology i11 London. Dr. J. A. Hadfield contributes an Introduction, and the subjects dealt with are^ " National Character and National Sentiment, by Professor Morris Ginsberg; " Psychology and Racial Differences," by P...