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Proposed Marine Mammal Noise Exposure Criteria: Current Data Base, Limitations, and research Needs

The Journal of the Acoustical Society of America 2008年第5_SUPPLEMENT期123卷 2988-2988页

作者： Darlene R. Ketten Ann E. Bowles William T. Ellison James J. Finneran Roger L. Gentry Charles R. Greene David Kastak James H. Miller Paul E. Nachtigall W J. Richardson Brandon Southall Jeanette A. Thomas Peter Tyack Woods Hole Oceanographic Institution Applied Ocean Physics & Engineering Dept. Woods Hole MA 02543 USA dketten@whoi.edu Hubbs‐Sea World Research Institute 2595 Ingraham Street San Diego CA 92109 USA abowles@*** Marine Acoustics Inc 809 Aquidneck Ave Middletown RI 02842 USA WEMAI@*** US Navy Marine Mammal Program Space and Naval Warfare Systems Center 53560 Hull St. Code 71510 San Diego CA 92152 USA james.finneran@navy.mil ProScience Consulting LLC P.O. Box 177 Dickerson MD 20842‐0177 USA roger.gentry@*** Greeneridge Sciences Inc. 4512 Via Huerto Santa Barbara CA 93110 USA cgreene@*** UCSC Institute of Marine Sciences Long Marine Lab ‐ University of California 100 Shaffer Road Santa Cruz CA 95060 USA kastak@ucsc.edu University of Rhode Island Department of Ocean Engineering Narragansett Bay Campus Narragansett RI 02882 USA miller@egr.uri.edu University of Hawaii Hawaii Institute of Marine Biology P.O. Box 1106 Kailua HI 96734 USA nachtiga@hawaii.edu LGL Ltd. Environmental Research Associates P.O. Box 280 22 Fisher St King City AB L7B 1A6 Canada wjr@*** National Marine Fisheries Service 1315 East West Hwy SSMC III #12539 Silver Spring MD 20910‐6233 USA Brandon.Southall@noaa.gov Western Illinois University Quad Cities Department of Biological Sciences 3561 60th St. Moline IL 61265 USA j‐thomas@wiu.edu Woods Hole Oceanographic Institution Applied Ocean Physics & Engineering Dept. Woods Hole MA 02543 USA ptyack@whoi.edu

This paper presents the findings of an inter‐disciplinary expert panel based on comprehensive review of hearing and noise effects data for marine and land mammals. The principal motivation for the review was to assist formulation of data‐based noise exposure criteria in light of rapidly evolving research advances in marine mammal hearing and underwater noise effects. Levels estimated to induce permanent hearing loss were determined for single exposure events for cetaceans (in water) and pinnipeds (in air and water) for each of 15 sound type/animal group combinations. These recommendations represent a current best estimate only and are modular, with modifiable key variables; e.g., source and exposure, to facilitate revision as data improve. In some cases, relatively explicit injury limits are proposed, e.g., 186 dB re: 1μPa2‐s (frequency‐weighted sound exposure level) and 218 dB re: 1μPapeak (unweighted peak sound pressure level) for pinnipeds in water exposed to multiple sound pulses. In others, particularly for behavioural effects of multiple‐pulse and non‐pulse exposures, response severity and significance are quantitatively scored, but the data do not allow identification of specific broadly‐applicable disturbance thresholds. These findings are a current best effort and include a discussion of limitations and recommended research needed to address data gaps.

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Newton-Like Methods for Parallel Independent Component Analysis

Newton-Like Methods for Parallel Independent Component Analy...

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IEEE Workshop on Machine Learning for Signal Processing

作者： Hao Shen Knut Huper Systems Engineering and Complex Systems Research Program National ICT Australia Canberra Australia Department of Information Engineering The Australian National University Canberra

Independent component analysis (ICA) can be studied from different angles. The performance of ICA algorithms significantly depends on the choice of the contrast function and the optimisation algorithm used in obtaining the demixing matrix. In this paper we focus on the standard linear ICA problem from an algorithmic point of view. It is well known that after a pre-whitening process, linear ICA problem can be solved via an optimisation approach on a suitable manifold. FastICA is one prominent linear ICA algorithm for solving the so-called one-unit ICA problem, which was recently shown by the authors to be an approximate Newton's method on the real projective space. To extract multiple components in parallel, in this paper, we propose an approximate ***-like ICA algorithm on the orthogonal group. The local quadratic convergence properties are discussed. The performance of the proposed algorithms is compared with several existing parallel ICA algorithms by numerical experiments..

关键词： Independent component analysis Signal processing algorithms Convergence Newton method Source separation Biomedical signal processing Australia Council systems engineering and theory Blind source separation Unsupervised learning

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Prescribing and implementing the Risk in Early Design (RED) method

Prescribing and implementing the Risk in Early Design (RED) ...

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2006 ASME International Design engineering Technical Conferences and Computers and Information In engineering Conference, DETC2006

作者： Lough, Katie Grantham Stone, Robert B. Tumer, Irem Department of Interdisciplinary Engineering University of Missouri-Rolla Rolla MO 65409 United States Complex Systems Design Group Intelligent Systems Division NASA-Ames Research Center Moffett Field CA 94035 United States

ISBN: (纸本)079183784X

To aid designer's abilities to increase product safety and reliability, risk assessments need to be moved forward to the conceptual design phase of a product. This is especially difficult because often the product has not assumed a physical form in this design stage. In an effort to perform risk assessments based on function, rather than physical components, the risk in early design (RED) method was developed. This paper presents the function based mathematical mappings of the RED method for preliminary risk assessments based on catalogued historical failure information. An example of the RED preliminary risk assessments on a thermal control subsystem along with heuristics for applying the particular types of risk assessments are discussed. Finally, the steps for performing RED in the conceptual design phase are offered. The heuristics and steps for preliminary risk assessments shown offer a method for identifying potential areas of concern in a product during the early stages of design when much can be done to over come them. Copyright © 2006 by ASME.

关键词： Product design

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The Risk in Early Design (RED) method: Likelihood and consequence formulations

The Risk in Early Design (RED) method: Likelihood and conseq...

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2006 ASME International Design engineering Technical Conferences and Computers and Information In engineering Conference, DETC2006

ISBN: (纸本)079183784X

This study focuses specifically on the relationship between function and risk in early design by presenting a mathematical mapping from product function to likelihood and consequence risk assessments that can be used in the conceptual design phase. An investigation of a spacecraft orientation subsystem is used to demonstrate the proposed mappings. The risk assessment presented in this paper is a tool that will aid designers by identifying risks as well as reducing the subjectivity of the likelihood and consequence value from a risk element, provide four key risk element properties (design parameter, failure mode, likelihood, and consequence) for numerous risk elements with a simple calculation, and provide a means for inexperienced designers to effectively address risk in the conceptual design phase. The investigation demonstrates that the method presented in this paper is a useful tool for preliminary identification and assessment of product risks. Copyright © 2006 by ASME.

关键词： Structural design

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An efficiency evaluation model of EDI in a value added network: The influence of user confidence on risk

An efficiency evaluation model of EDI in a value added netwo...

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11th International Conference of the Association Information and Management, AIM 2006

作者： Baile, Serge Research Center on Organizational Development and Information Systems Business Administration Institute IAE-University of Toulouse 1 France Program in Information Systems Management and Engineering Toulouse Business School-Groupe ESC Toulouse Financial Research Group France

ISBN: (纸本)9783885791867

The evaluation of the performance of information technology and information systems has, over the past three decades, been the object of numerous studies using a wide range of models. Few of them have focused on the study of efficiency, and even fewer still on the development of a specific research model. This paper helps to fill this gap by making a contribution towards formalizing a specific, original theoretical framework and conceptual model, one based on user confidence in ad hoc EDI technology and the risks associated with its use. The model is tested using data obtained from users of a value added network in the car insurance sector. The results of the data analysis, obtained through a series of principal component analysis methods with a Promax rotation and an Amos structural equation analysis, confirm the existence, on the one hand, of an optimal structure of EDI efficiency evaluation factors, and on the other hand, of the relevance of a data model that establishes a hierarchy aimed at explaining risk.

关键词： Efficiency

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Artificial intelligence and knowledge management

Artificial intelligence and knowledge management

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Conference on Artificial Intelligence in Theory and Practice held at the 19th World Computer Congress

作者： Hoeschl, Hugo Cesar Barcellos, Vania WBSA Intelligent Systems S.A Brazil Research Institute on e-Gov Juridical Intelligence and Systems - IJURIS Brazil Program of Post-Graduation in Engineering and Knowledge Management Federal University of Santa Catarina Brazil

ISBN: (纸本)0387346546

This article intends to make an analysis about the Artificial Intelligence (AI) and the Knowledge Management (KM). Faced with the dualism mind and body how we be able to see it AI? It doesn't intent to create identical copy of human being, but try to find the better form to represent all the knowledge contained in our minds. The society of the information lives a great paradox, at the same time that we have access to an innumerable amount of information, the capacity and the forms of its processing are very limited. In this context, institutions and centers of research devote themselves to the finding of ways to use to advantage the available data consistently. The interaction of the Knowledge Management with Artificial Intelligence makes possible the development of filtering tools and pre-analysis of the information that appear as a reply to the expectations to extract resulted optimized of databases and open and not-structuralized source, as the Internet.

关键词： Knowledge management

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Longitudinal motion control of air-breathing hypersonic vehicles based on time-varying models

Longitudinal motion control of air-breathing hypersonic vehi...

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14th AIAA/AHI International Space Planes and Hypersonics systems Technologies Conference

作者： Fidan, Bariş Kuipers, Matthew Ioannou, Petros A. Mirmirani, Maj National ICT Australia Ltd. Australian National University Canberra ACT 2601 Australia University of Southern California Los Angeles CA 90089 United States California State University Los Angeles CA 90032 United States Systems Engineering and Complex Systems Program Australia AIAA United States Electrical Engineering Department Mechanical Engineering Department

ISBN: (纸本)1563478269

The non-standard dynamic characteristics of air-breathing hypersonic flight vehicles together with the aerodynamic effects of hypersonic flight make the flight control of such systems highly challenging. Moreover the wide range of speed during operation and the lack of a broad flight dynamics database add significant plant parameter variations and uncertainties to the problem of controlling air-breathing hypersonic flight. In this paper, we present a general approach to this challenging problem based on linear time-varying plant models. This approach lets employment of some recent techniques developed for adaptive and non-adaptive control of systems with fast varying parameters via exploitation of a priori information about parameter variations. We discuss application of this approach to a generic analytical hypersonic flight vehicle model that is widely used in the literature as well as a detailed generic hypersonic vehicle concept model developed at the California State University - Los Angeles. The paper is concluded with some remarks on validations and extensions of the presented approach.

关键词： Spacecraft

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Local Convergence Properties of Fastica and Some Generalisations

Local Convergence Properties of Fastica and Some Generalisat...

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International Conference on Acoustics, Speech, and Signal Processing (ICASSP)

作者： K. Huper Hao Shen A.-K. Seghouane Systems Engineering and Complex Systems Research Program National ICT Australia Cambridge Research Laboratory Canberra ACT Australia Department of Information Engineering Research School of Information Sciences and Engineering Australian National University Canberra ACT Australia

In recent years, algorithms to perform independent component analysis in blind identification, localisation of sources or more general in data analysis have been developed. Prominent example certainly is the socalled FastICA algorithms from the Finnish school. In this paper we will generalise the FastICA algorithm considered as a discrete dynamical system on the unit sphere to the case where all units converge simultaneously, i.e., we consider some kind of parallel FastICA algorithm living on the orthogonal group. In addition we present a local convergence analysis for the algorithms proposed in this paper building on earlier work. It turns out that one can treat these type of algorithms in a similar manner as the Rayleigh quotient iteration, well known in numerical linear algebra, i.e. considering the algorithm as a discrete dynamical system on a suitable manifold. The algorithms presented here are compared by several numerical experiments and simulations

关键词： Convergence Signal processing algorithms Independent component analysis Data engineering Educational institutions Source separation Australia Council systems engineering and theory Laboratories Data analysis

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An optimized low voltage and High Frequency CCII based multifunction Filters

An optimized low voltage and High Frequency CCII based multi...

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ICECS 2006 - 13th IEEE International Conference on Electronics, Circuits and systems

作者： Salem, Samir Ben Masmoudi, Dorra Sellami Said, Ashwek Ben Loulou, Mourad Laboratoire de l'Electronique et des Technologies de l'Information National Engineering School of Sfax Tunisia Research Unit on Intelligent Design and Control of Complex Systems National Engineering School of Sfax Tunisia

ISBN: (纸本)1424403952

In this paper, a low voltage current conveyor (CCII) based multifunction filter is presented. Firstly, thanks to an optimizing heuristic, an optimal sizing of a low voltage low power CMOS current conveyor (CCII) was done. Hence, we improve static and dynamic performances of this configuration. The optimized CCII configuration has a current bandwidth of 1.103GHz and a voltage bandwidth of 1.18GHz and 33.4 Ω as RX parasitic resistance value. Secondly, implementation of a multifunction filter based on this configuration was done. The current mode filter has a tunable central frequency in the range [50MHz-800MHz]. PSPICE simulations are presented to demonstrate these results. ©2006 IEEE.

关键词： Bandwidth

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An Urban Traffic Control System Based on Mobile Multi-Agents

An Urban Traffic Control System Based on Mobile Multi-Agents

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IEEE International Conference on Vehicular Electronics and Safety (ICVES)

作者： Zhenjiang Li Fei-Yue Wang Qinghai Miao Feng He Key Laboratory of Complex Systems and Intelligence Science Institute of Automation Chinese Academy and Sciences Beijing China Program for Advanced Research in Complex Systems Department of Systems and Industrial Engineering University of Arizona Tucson Tucson AZ USA Key Laboratory for Complex Systems and Intelligence Science Chinese Academy and Sciences Beijing China

This paper presents an urban traffic control system using the multi-agent technology, called aDAPTS for agent-based Distributed and Adaptive Platform for Transportation systems. Based on the proposed system architecture, we divide an urban traffic system into five different functional modules and define five types of agents correspondingly. The composition and structure of each agent is discussed in detail and the correlation among them is addressed. Methods for verification and validation in artificial transportation systems are also studied in this paper.

关键词： Traffic control Control systems Distributed control Transportation Intelligent agent Automatic control Hardware Environmental management Artificial intelligence Helium

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