# IEEE Journal of Oceanic Engineering

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Displaying Results 1 - 14 of 14

Publication Year: 2009, Page(s): C1
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• ### IEEE Journal of Oceanic Engineering publication information

Publication Year: 2009, Page(s): C2
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• ### LOAPEX: The Long-Range Ocean Acoustic Propagation EXperiment

Publication Year: 2009, Page(s):1 - 11
Cited by:  Papers (15)
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This paper provides an overview of the experimental goals and methods of the Long-range Ocean Acoustic Propagation EXperiment (LOAPEX), which took place in the northeast Pacific Ocean between September 10, 2004 and October 10, 2004. This experiment was designed to address a number of unresolved issues in long-range, deep-water acoustic propagation including the effect of ocean fluctuations such as... View full abstract»

• ### The Influence of Emitter and Receiver Motion on Acoustic Coherence in Shallow Water

Publication Year: 2009, Page(s):12 - 23
Cited by:  Papers (1)
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This paper is aimed at studying the source and receiver motion effects on the energy and correlation characteristics of the acoustic field in shallow water. The statistical analysis is based on the radiation transport equation for the mutual coherence function (MCF) of the multimodal Doppler-shifted field. A general computer program has been elaborated to implement this theory for rough surface sc... View full abstract»

• ### Matching a Permanent Magnet Synchronous Generator to a Fixed Pitch Vertical Axis Turbine for Marine Current Energy Conversion

Publication Year: 2009, Page(s):24 - 31
Cited by:  Papers (20)  |  Patents (1)
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Extracting energy from a free-flow marine current using a vertical axis fixed pitch turbine requires a generator that can handle varying speeds and loads, since such a turbine gives maximum power capture for a fixed tip speed ratio. A prototype of such a generator has been designed and constructed. In this paper, its variable speed and load operation is evaluated, both in terms of how the construc... View full abstract»

• ### Buried Underwater Object Classification Using a Collaborative Multiaspect Classifier

Publication Year: 2009, Page(s):32 - 44
Cited by:  Papers (8)
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In this paper, a new collaborative multiaspect classification system (CMAC) is introduced, which utilizes a group of collaborative decision-making agents capable of producing a high-confidence final decision based on features obtained over multiple aspects. It is also shown how CMAC can be modified to perform multiaspect classification using a decision feedback (DF) strategy. The system is then ap... View full abstract»

• ### Estimation of $K$-Distribution Shape Parameter From Sonar Data: Sample Size Limitations

Publication Year: 2009, Page(s):45 - 50
Cited by:  Papers (2)
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The K-distribution has been found to provide a good description of the probability density function (pdf) of the matched filter envelope of sonar signals backscattered from the seafloor. Furthermore, the scale and shape parameters that specify the K-distribution, under certain assumptions, have been related to physical descriptors of the seafloor. Specifically, the shape parameter ha... View full abstract»

• ### Combined Geoacoustic Inversion of Propagation and Reverberation Data

Publication Year: 2009, Page(s):51 - 62
Cited by:  Papers (2)
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Sonar performance predictions in shallow water are strongly dependent on good knowledge of the geoacoustic and scattering properties of the seabed. One technique to extract information about the bottom is to use a towed source and a towed horizontal array. This towed system has been shown to be applicable for characterizing the bottom properties locally by inversion of the acoustic signals receive... View full abstract»

• ### Efficient Wideband Parameter Estimation Using Arbitrary Enveloped LFM Signals via Hermite Decompositions

Publication Year: 2009, Page(s):63 - 74
Cited by:  Papers (1)
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Signals with finite time support are frequently used in active sonar and radar processing. In these applications, for efficient computations, it is necessary to have a compact description of the signals' shape and time evolution. For this purpose, the Hermite series expansions are used in this paper to approximate an arbitrary enveloped linear frequency modulated signal. The Hermite basis function... View full abstract»

• ### Acoustic Detection and Localization of a Turboprop Aircraft by an Array of Hydrophones Towed Below the Sea Surface

Publication Year: 2009, Page(s):75 - 82
Cited by:  Papers (9)
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The acoustic spectrum of a propeller-driven aircraft is dominated by a series of spectral lines that are harmonically related to the blade rate (which is equal to the product of the propeller rotation rate and the number of blades on the propeller). We show that an array of acoustic sensors towed below the sea surface can be used for the passive detection and localization of such an aircraft. The ... View full abstract»

• ### Attenuation Measurements Across Surface-Ship Wakes and Computed Bubble Distributions and Void Fractions

Publication Year: 2009, Page(s):83 - 92
Cited by:  Papers (7)
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A surface ship's wake is composed of several hydrodynamic phenomena. A large part of that wake contains a mixture of air bubbles of various sizes in turbulent water. Eventually, as the wake ages, the turbulence subsides and bubbles begin to rise at rates that are determined by their sizes. These bubbles of various sizes and concentrations control the propagation of acoustic signals inside and acro... View full abstract»

• ### Fluid-Filled Passive Sonar Calibration Spheres: Design, Modeling, and Measurement

Publication Year: 2009, Page(s):93 - 100
Cited by:  Papers (6)
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Hollow spheres have long been used as simple underwater targets for testing acoustic projector systems. While spheres offer a mathematically simple shape with a resolvable scattering strength, their usage as a passive target has been less successful due to the complicated manner in which a hollow sphere scatters energy from its exterior and interior as a function of frequency and temperature. Furt... View full abstract»

• ### IEEE Oceanic Engineering Society Information

Publication Year: 2009, Page(s): C3
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• ### Blank page [back cover]

Publication Year: 2009, Page(s): C4
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## Aims & Scope

The IEEE Journal of Oceanic Engineering (ISSN 0364-9059) is the online-only quarterly publication of the IEEE Oceanic Engineering Society (IEEE OES). The scope of the Journal is the field of interest of the IEEE OES, which encompasses all aspects of science, engineering, and technology that address research, development, and operations pertaining to all bodies of water. This includes the creation of new capabilities and technologies from concept design through prototypes, testing, and operational systems to sense, explore, understand, develop, use, and responsibly manage natural resources.

Full Aims & Scope

## Meet Our Editors

Editor-in-Chief
Mandar Chitre
Acoustic Research Laboratory
National University of Singapore