Pub Date : 2010-05-24DOI: 10.1109/OCEANSSYD.2010.5603626
M. Jacobi, T. Rauschenbach
Developing algorithms and parameterizing controllers for autonomous underwater vehicles are tasks which needs excessive testing. Therefore, we developed an environment and a tool chain for these difficult and mostly expensive tasks. This tool chain consist of different steps for implementing algorithms from the idea to mission ready. These steps include rapid prototyping, simulation testing, testing in controlled environments and finally productive testing. As an example we chose the development of a distance controller, which is required for inspection tasks.
{"title":"A tool chain for AUV system testing","authors":"M. Jacobi, T. Rauschenbach","doi":"10.1109/OCEANSSYD.2010.5603626","DOIUrl":"https://doi.org/10.1109/OCEANSSYD.2010.5603626","url":null,"abstract":"Developing algorithms and parameterizing controllers for autonomous underwater vehicles are tasks which needs excessive testing. Therefore, we developed an environment and a tool chain for these difficult and mostly expensive tasks. This tool chain consist of different steps for implementing algorithms from the idea to mission ready. These steps include rapid prototyping, simulation testing, testing in controlled environments and finally productive testing. As an example we chose the development of a distance controller, which is required for inspection tasks.","PeriodicalId":129808,"journal":{"name":"OCEANS'10 IEEE SYDNEY","volume":"105 6","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-05-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120819024","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2010-05-24DOI: 10.1109/OCEANSSYD.2010.5603643
P. Courmontagne, G. Julien, M. Bouhier
The pulse-compression is a technique mainly used in sonar, radar and echography to augment the range resolution as well as the signal to noise ratio. This is achieved using a matched-filtering of the received signal with the bandpass transmitted signal. Taking into account the main assumptions of the matched filter theory, the use of the bandpass transmitted pulse as matched filter's impulse response is only available if the useful signal is well known and if the noise is white, which is not the case in practice. For this reason, we propose to improve the classical pulse-compression technique using the stochastic matched filter, which ensures a maximization of the signal to noise ratio, when the useful signal is a realization of a random process and the disturbing signal a colored noise. Results obtained on synthetic and real data are proposed and discussed.
{"title":"An improvement to the pulse compression scheme","authors":"P. Courmontagne, G. Julien, M. Bouhier","doi":"10.1109/OCEANSSYD.2010.5603643","DOIUrl":"https://doi.org/10.1109/OCEANSSYD.2010.5603643","url":null,"abstract":"The pulse-compression is a technique mainly used in sonar, radar and echography to augment the range resolution as well as the signal to noise ratio. This is achieved using a matched-filtering of the received signal with the bandpass transmitted signal. Taking into account the main assumptions of the matched filter theory, the use of the bandpass transmitted pulse as matched filter's impulse response is only available if the useful signal is well known and if the noise is white, which is not the case in practice. For this reason, we propose to improve the classical pulse-compression technique using the stochastic matched filter, which ensures a maximization of the signal to noise ratio, when the useful signal is a realization of a random process and the disturbing signal a colored noise. Results obtained on synthetic and real data are proposed and discussed.","PeriodicalId":129808,"journal":{"name":"OCEANS'10 IEEE SYDNEY","volume":"42 7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-05-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129881623","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2010-05-24DOI: 10.1109/OCEANSSYD.2010.5603960
M. Man, Z. M. Sidek, M. Saman, M. Z. Zakaria
Evaluation for effectiveness and efficiency of artificial reefs (AR) development is quite difficult and troublesome. This is because of high cost incurred. As for common practice, evaluation process is done by special dive task force unit to conduct diving activity to observe on how AR has developed. This paper presents a framework architecture to integrate location coordinate data (longitude and lattitude) of AR with the fish catches data at all identified jetty. In SIDIF, the data of fish catches will be mapped with data on location coordinate of AR as a whole via mapping and integration of these two (2) different databases. Using this methodology, the effectiveness and efficiency of AR development will be achieved as well as the evaluation will be measured. In this study, research only made integration two database only namely artificial reef database (ARPOS) and fish landing database (WiFISH). Before integration process both this database is conducted, various issues should be identified over proceed.
{"title":"SIDIF: Location based technique for spatial information databases integration framework","authors":"M. Man, Z. M. Sidek, M. Saman, M. Z. Zakaria","doi":"10.1109/OCEANSSYD.2010.5603960","DOIUrl":"https://doi.org/10.1109/OCEANSSYD.2010.5603960","url":null,"abstract":"Evaluation for effectiveness and efficiency of artificial reefs (AR) development is quite difficult and troublesome. This is because of high cost incurred. As for common practice, evaluation process is done by special dive task force unit to conduct diving activity to observe on how AR has developed. This paper presents a framework architecture to integrate location coordinate data (longitude and lattitude) of AR with the fish catches data at all identified jetty. In SIDIF, the data of fish catches will be mapped with data on location coordinate of AR as a whole via mapping and integration of these two (2) different databases. Using this methodology, the effectiveness and efficiency of AR development will be achieved as well as the evaluation will be measured. In this study, research only made integration two database only namely artificial reef database (ARPOS) and fish landing database (WiFISH). Before integration process both this database is conducted, various issues should be identified over proceed.","PeriodicalId":129808,"journal":{"name":"OCEANS'10 IEEE SYDNEY","volume":"120 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-05-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128490457","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2010-05-24DOI: 10.1109/OCEANSSYD.2010.5603634
Yi-Chung Yang, Cheng-Han Tsai
This study investigated the relationship between the group wave properties in the typhoon waves measured outside the Hualien Harbor and the long period waves inside. Groupiness factors defined with total run length, Smoothed Instantaneous Wave Energy History (SIWEH), and envelopes of the waves were used as group wave parameters. It was found that the standard deviation of the SIWEH and envelopes of the typhoon waves measured outside the harbor have relatively good relationship with the standard deviation of the long period wave measured inside the harbor. Spectral analysis on the envelopes of the waves outside the harbor showed that there was energy in the 60–300s period range.
{"title":"Infragravity waves in the Hualien Harbor","authors":"Yi-Chung Yang, Cheng-Han Tsai","doi":"10.1109/OCEANSSYD.2010.5603634","DOIUrl":"https://doi.org/10.1109/OCEANSSYD.2010.5603634","url":null,"abstract":"This study investigated the relationship between the group wave properties in the typhoon waves measured outside the Hualien Harbor and the long period waves inside. Groupiness factors defined with total run length, Smoothed Instantaneous Wave Energy History (SIWEH), and envelopes of the waves were used as group wave parameters. It was found that the standard deviation of the SIWEH and envelopes of the typhoon waves measured outside the harbor have relatively good relationship with the standard deviation of the long period wave measured inside the harbor. Spectral analysis on the envelopes of the waves outside the harbor showed that there was energy in the 60–300s period range.","PeriodicalId":129808,"journal":{"name":"OCEANS'10 IEEE SYDNEY","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-05-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128157917","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2010-05-24DOI: 10.1109/OCEANSSYD.2010.5603685
D. Parihar, Ankit Agarwal, M. Agrawal
Time reversal is a technique to focus waves, both temporally and spatially, through an inhomogeneous medium. The incident pressure wave is time reversed and re-transmitted from an array of transducers to focus the pressure on a source or at a point target which may be reflective. This array of sensors is called time reversal mirror (TRM). In this paper, we have studied the spatial and the temporal focusing properties of different TRM array geometries. Two dimensional as well as three dimensional geometries for different configurations and environment have been studied. It has been found that there exists optimal array configuration for both temporal and spatial focusing.
{"title":"Time reversal mirror: Temporal and spatial focusing tool","authors":"D. Parihar, Ankit Agarwal, M. Agrawal","doi":"10.1109/OCEANSSYD.2010.5603685","DOIUrl":"https://doi.org/10.1109/OCEANSSYD.2010.5603685","url":null,"abstract":"Time reversal is a technique to focus waves, both temporally and spatially, through an inhomogeneous medium. The incident pressure wave is time reversed and re-transmitted from an array of transducers to focus the pressure on a source or at a point target which may be reflective. This array of sensors is called time reversal mirror (TRM). In this paper, we have studied the spatial and the temporal focusing properties of different TRM array geometries. Two dimensional as well as three dimensional geometries for different configurations and environment have been studied. It has been found that there exists optimal array configuration for both temporal and spatial focusing.","PeriodicalId":129808,"journal":{"name":"OCEANS'10 IEEE SYDNEY","volume":"75 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-05-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128585767","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2010-05-24DOI: 10.1109/OCEANSSYD.2010.5603963
S. M. Taylor, B. Bornhold
Canada has gained a world-leading position in the science and technology of cabled ocean observing systems, principally through the federal and British Columbia (BC) government investments ($120M) in the VENUS and NEPTUNE Canada ocean observatories, now deployed in coastal to deep ocean waters off BC's West Coast. The combination of continuous power, high bandwidth and real-time data streaming make the VENUS and NEPTUNE Canada observatories transformative in their capacity to support research applications to key areas of public policy, including environmental monitoring, hazard mitigation, resource assessment, and sovereignty and security. While deployed off the West Coast, the technologies are applicable in other settings including the Arctic. Ocean Networks Canada (ONC) was created as a not-for-profit agency by the University of Victoria in 2007 to manage and develop the VENUS and NEPTUNE Canada observatories and their applications to public policy, commercial development, and public outreach. To advance its mandate, ONC was recently named as a federal Centre of Excellence in Commercialization and Research. The public policy initiatives of ONC, in the context of its broader strategic plan, have included: (a) a review of Canadian federal and provincial policy initiatives and priorities and their relationship to the data types generated by the NEPTUNE Canada and VENUS research programs; (b) planning of workshops with federal science-based departments and agencies to be held later in 2010; (c) discussions with BC government departments related to their emerging Ocean and Coastal Strategy; and, preparation of a discussion paper for federal government departments on application of cabled observatory technologies to the Arctic.
{"title":"Connecting the dots: Ocean research and public policy","authors":"S. M. Taylor, B. Bornhold","doi":"10.1109/OCEANSSYD.2010.5603963","DOIUrl":"https://doi.org/10.1109/OCEANSSYD.2010.5603963","url":null,"abstract":"Canada has gained a world-leading position in the science and technology of cabled ocean observing systems, principally through the federal and British Columbia (BC) government investments ($120M) in the VENUS and NEPTUNE Canada ocean observatories, now deployed in coastal to deep ocean waters off BC's West Coast. The combination of continuous power, high bandwidth and real-time data streaming make the VENUS and NEPTUNE Canada observatories transformative in their capacity to support research applications to key areas of public policy, including environmental monitoring, hazard mitigation, resource assessment, and sovereignty and security. While deployed off the West Coast, the technologies are applicable in other settings including the Arctic. Ocean Networks Canada (ONC) was created as a not-for-profit agency by the University of Victoria in 2007 to manage and develop the VENUS and NEPTUNE Canada observatories and their applications to public policy, commercial development, and public outreach. To advance its mandate, ONC was recently named as a federal Centre of Excellence in Commercialization and Research. The public policy initiatives of ONC, in the context of its broader strategic plan, have included: (a) a review of Canadian federal and provincial policy initiatives and priorities and their relationship to the data types generated by the NEPTUNE Canada and VENUS research programs; (b) planning of workshops with federal science-based departments and agencies to be held later in 2010; (c) discussions with BC government departments related to their emerging Ocean and Coastal Strategy; and, preparation of a discussion paper for federal government departments on application of cabled observatory technologies to the Arctic.","PeriodicalId":129808,"journal":{"name":"OCEANS'10 IEEE SYDNEY","volume":"62 11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-05-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128685244","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2010-05-24DOI: 10.1109/OCEANSSYD.2010.5603898
J. Candy, D. Chambers, E. Breitfeller, B. Guidry, J. Verbeke, M. Axelrod, K. Sale, A. Meyer
The detection of radioactive contraband is a critical problem is maintaining national security for any country. Photon emissions from threat materials challenge both detection and measurement technologies especially when concealed by various types of shielding complicating the transport physics significantly. This problem becomes especially important when ships are intercepted by U.S. Coast Guard harbor patrols searching for contraband. The development of a sequential model-based processor that captures both the underlying transport physics of gamma-ray emissions including Compton scattering and the measurement of photon energies offers a physics-based approach to attack this challenging problem. The inclusion of a basic radionuclide representation of absorbed/scattered photons at a given energy along with interarrival times is used to extract the physics information available from the noisy measurements portable radiation detection systems used to interdict contraband. It is shown that this physics representation can incorporated scattering physics leading to an “extended” model-based structure that can be used to develop an effective sequential detection technique. The resulting model-based processor is shown to perform quite well based on data obtained from a controlled experiment.
{"title":"Model-based detection of radioactive contraband for harbor defense incorporating Compton scattering physics","authors":"J. Candy, D. Chambers, E. Breitfeller, B. Guidry, J. Verbeke, M. Axelrod, K. Sale, A. Meyer","doi":"10.1109/OCEANSSYD.2010.5603898","DOIUrl":"https://doi.org/10.1109/OCEANSSYD.2010.5603898","url":null,"abstract":"The detection of radioactive contraband is a critical problem is maintaining national security for any country. Photon emissions from threat materials challenge both detection and measurement technologies especially when concealed by various types of shielding complicating the transport physics significantly. This problem becomes especially important when ships are intercepted by U.S. Coast Guard harbor patrols searching for contraband. The development of a sequential model-based processor that captures both the underlying transport physics of gamma-ray emissions including Compton scattering and the measurement of photon energies offers a physics-based approach to attack this challenging problem. The inclusion of a basic radionuclide representation of absorbed/scattered photons at a given energy along with interarrival times is used to extract the physics information available from the noisy measurements portable radiation detection systems used to interdict contraband. It is shown that this physics representation can incorporated scattering physics leading to an “extended” model-based structure that can be used to develop an effective sequential detection technique. The resulting model-based processor is shown to perform quite well based on data obtained from a controlled experiment.","PeriodicalId":129808,"journal":{"name":"OCEANS'10 IEEE SYDNEY","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-05-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129921984","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2010-05-24DOI: 10.1109/OCEANSSYD.2010.5603667
B. Tomasi, G. Zappa, K. McCoy, P. Casari, M. Zorzi
In this paper, we present an analysis of the space-time correlation and power-delay profile (PDP) properties of the underwater acoustic channel in the nearabouts of the Pianosa Island, off the north-western coast of Italy. Our data has been collected during sea trials which took place from May to September 2009. Using the results from this evaluation, we compare the measured bit error rates affecting the transmission of Frequency-Hopping Binary Frequency Shift Keying (FH-BFSK) against those obtained by simulating the same digital modulation scheme over synthesized channels whose spread in time has the same statistical properties as those found in the trials, and whose channel taps are Rayleigh-distributed. The results show a generally good accordance of the simulated performance with the outcomes of the experiments. Moreover, given the absence of a widely agreed upon underwater channel model, and the recent interest in incorporating more accurate propagation simulators into network simulators, we compare the measured channel impulse responses against those obtained through the ray tracing tool Bellhop, and give some observations about the suitability of the tool for the purpose of reproducing realistic channel traces.
{"title":"Experimental study of the space-time properties of acoustic channels for underwater communications","authors":"B. Tomasi, G. Zappa, K. McCoy, P. Casari, M. Zorzi","doi":"10.1109/OCEANSSYD.2010.5603667","DOIUrl":"https://doi.org/10.1109/OCEANSSYD.2010.5603667","url":null,"abstract":"In this paper, we present an analysis of the space-time correlation and power-delay profile (PDP) properties of the underwater acoustic channel in the nearabouts of the Pianosa Island, off the north-western coast of Italy. Our data has been collected during sea trials which took place from May to September 2009. Using the results from this evaluation, we compare the measured bit error rates affecting the transmission of Frequency-Hopping Binary Frequency Shift Keying (FH-BFSK) against those obtained by simulating the same digital modulation scheme over synthesized channels whose spread in time has the same statistical properties as those found in the trials, and whose channel taps are Rayleigh-distributed. The results show a generally good accordance of the simulated performance with the outcomes of the experiments. Moreover, given the absence of a widely agreed upon underwater channel model, and the recent interest in incorporating more accurate propagation simulators into network simulators, we compare the measured channel impulse responses against those obtained through the ray tracing tool Bellhop, and give some observations about the suitability of the tool for the purpose of reproducing realistic channel traces.","PeriodicalId":129808,"journal":{"name":"OCEANS'10 IEEE SYDNEY","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-05-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130158356","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2010-05-24DOI: 10.1109/OCEANSSYD.2010.5603860
N. Barrett, J. Seiler, T. Anderson, Stefan B. Williams, S. Nichol, N. Hill
Autonomous Underwater Vehicles (AUVs) have only recently become available as a tool to investigate the biological and physical composition of the seabed utilizing a suite of image capture and high-resolution geophysical tools. In this study we trialled the application of an AUV, integrating AUV image capture with ship-based high resolution multibeam bathymetry, to map benthic habitats and biodiversity in coastal and offshore waters of SE Tasmania. The AUV successfully surveyed a plethora of marine habitats and organisms, including high-relief kelp-dominated rocky reefs to deep mid-shelf reef and sediments that are otherwise difficult to access. To determine the spatial extent of these habitats within a broader-scale context, the AUV surveys were integrated with larger scale multibeam mapping surveys. The data collected using the AUV significantly improved our understanding of the distribution of benthic habitats and marine organisms in this region, with direct application to the management and conservation of these environments. For example, preliminary results identified the distributional extent of an introduced invasive marine pest, the screw-shell Maoricolpeus roseus, which was recorded adjacent to rocky reefs but is now known to also extend in high abundance across the SE shelf. Integrating the AUV data with the largescale mapping data provided the opportunity to quantify the relationships between the biological and physical variables, and to use thise data to develop predictive models of biodiversity across the region. The effectiveness of the AUV as a pioneering tool for undertaking spatially repeatable surveys makes it a highly versatile technique for future use in surveying remote environments, particularly with respect to surveying and monitoring biodiversity in newly established Commonwealth MPA's. It also has application in the context of climate change, the study of invasive species, impacts of fishing activities and determining the relative uniqueness and/or representativeness of these marine environments.
{"title":"Autonomous Underwater Vehicle (AUV) for mapping marine biodiversity in coastal and shelf waters: Implications for marine management","authors":"N. Barrett, J. Seiler, T. Anderson, Stefan B. Williams, S. Nichol, N. Hill","doi":"10.1109/OCEANSSYD.2010.5603860","DOIUrl":"https://doi.org/10.1109/OCEANSSYD.2010.5603860","url":null,"abstract":"Autonomous Underwater Vehicles (AUVs) have only recently become available as a tool to investigate the biological and physical composition of the seabed utilizing a suite of image capture and high-resolution geophysical tools. In this study we trialled the application of an AUV, integrating AUV image capture with ship-based high resolution multibeam bathymetry, to map benthic habitats and biodiversity in coastal and offshore waters of SE Tasmania. The AUV successfully surveyed a plethora of marine habitats and organisms, including high-relief kelp-dominated rocky reefs to deep mid-shelf reef and sediments that are otherwise difficult to access. To determine the spatial extent of these habitats within a broader-scale context, the AUV surveys were integrated with larger scale multibeam mapping surveys. The data collected using the AUV significantly improved our understanding of the distribution of benthic habitats and marine organisms in this region, with direct application to the management and conservation of these environments. For example, preliminary results identified the distributional extent of an introduced invasive marine pest, the screw-shell Maoricolpeus roseus, which was recorded adjacent to rocky reefs but is now known to also extend in high abundance across the SE shelf. Integrating the AUV data with the largescale mapping data provided the opportunity to quantify the relationships between the biological and physical variables, and to use thise data to develop predictive models of biodiversity across the region. The effectiveness of the AUV as a pioneering tool for undertaking spatially repeatable surveys makes it a highly versatile technique for future use in surveying remote environments, particularly with respect to surveying and monitoring biodiversity in newly established Commonwealth MPA's. It also has application in the context of climate change, the study of invasive species, impacts of fishing activities and determining the relative uniqueness and/or representativeness of these marine environments.","PeriodicalId":129808,"journal":{"name":"OCEANS'10 IEEE SYDNEY","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-05-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128986316","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2010-05-24DOI: 10.1109/OCEANSSYD.2010.5603904
F. Zorzi, M. Stojanovic, M. Zorzi
Energy-efficiency in underwater networks is a key issue that affects all aspects of network design, from hardware to protocols and applications. In this paper we analyze the impact of node density on the energy consumption in transmission, reception and idle-listening, in a network where nodes follow a duty cycle scheme. We consider the energy performance of the network for different scenarios, where a different number of nodes and different values of the duty cycle are taken into account. We simulate different power settings, showing that there exists an effective network density for which the energy consumption is minimized.
{"title":"On the effects of node density and duty cycle on energy efficiency in underwater networks","authors":"F. Zorzi, M. Stojanovic, M. Zorzi","doi":"10.1109/OCEANSSYD.2010.5603904","DOIUrl":"https://doi.org/10.1109/OCEANSSYD.2010.5603904","url":null,"abstract":"Energy-efficiency in underwater networks is a key issue that affects all aspects of network design, from hardware to protocols and applications. In this paper we analyze the impact of node density on the energy consumption in transmission, reception and idle-listening, in a network where nodes follow a duty cycle scheme. We consider the energy performance of the network for different scenarios, where a different number of nodes and different values of the duty cycle are taken into account. We simulate different power settings, showing that there exists an effective network density for which the energy consumption is minimized.","PeriodicalId":129808,"journal":{"name":"OCEANS'10 IEEE SYDNEY","volume":"88 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-05-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129135647","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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