OCEANS 2008 - MTS/IEEE Kobe Techno-Ocean最新文献

{"title":"Numerical Study on the Rise of pCO2 in Seawater by the Leakage of CO2 Purposefully Stored under the Seabed","authors":"Y. Kano, T. Sato","doi":"10.1016/J.EGYPRO.2009.01.249","DOIUrl":"https://doi.org/10.1016/J.EGYPRO.2009.01.249","url":null,"abstract":"","PeriodicalId":368672,"journal":{"name":"OCEANS 2008 - MTS/IEEE Kobe Techno-Ocean","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129083918","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}

{"title":"Nested Distributed Autonomy Architecture for Undersea Sensor Networks","authors":"Arjuna Balasuriya, Henrik Schmidt, Michael R. Benjamin","doi":"10.1109/OCEANSKOBE.2008.4531110","DOIUrl":"https://doi.org/10.1109/OCEANSKOBE.2008.4531110","url":null,"abstract":"Underwater surveillance is experiencing a paradigm shift from platform-centric to distributed networks of autonomous underwater vehicles (AUVs). In order to achieve the performance goals with smaller apertures carried by single platforms, new concepts of operations must be developed, which exploit platform mobility to adapt to the changing environmental conditions. Unlike the network of sensor nodes used in air/land, underwater networks cannot rely on the low channel capacity of the acoustic communication available. The operation of such an underwater sensor network requires a much higher level of autonomous, distributed command and control architecture. This paper discusses the proposed nested autonomy architecture developed at MIT for command and control of AUVs.","PeriodicalId":368672,"journal":{"name":"OCEANS 2008 - MTS/IEEE Kobe Techno-Ocean","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-04-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115463452","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}

{"title":"System Plan of CO2 Marine Transport and Release in Deep Waters for Moving-ship Type of CO2 Ocean Storage","authors":"J. Minamiura, M. Ozaki, M. Ohta, Y. Sasaki, M. Matsuura","doi":"10.1109/OCEANSKOBE.2008.4530930","DOIUrl":"https://doi.org/10.1109/OCEANSKOBE.2008.4530930","url":null,"abstract":"Global climate change due to the increasing concentrations of CO2 in the atmosphere has become a great concern internationally. Ocean storage of the captured CO2 from fossil-fuel burning is a possible option for mitigating the increase of CO2 concentration in the atmosphere. That is, CO2 would be separated from exhaust gas and collected at the large sources, and injected into the subterranean reservoirs or into the deep ocean to be isolated from the atmosphere for a sufficiently long time period. The moving-ship type of CO2 ocean storage is a concept whereby captured and liquefied CO2 is delivered by ship to a site and injected into the ocean depths by means of a pipe suspended beneath a ship as it slowly moves through the water. The released CO2 will form plenty of droplets, and then they will rise gently due to the buoyancy, while reducing in the size to disappear by dissolution into the ambient seawater. Such vertical journey of CO2 droplets as well as the horizontal movement of release point could distribute CO2 to the planned region all over and control the initial pH changes. In case of bad weather conditions, CO2 marine transport and operation on the sea should be adjourned although CO2 would be captured at the plant every day. It is, therefore, required that the system would have the buffer storage at the port and the extra shipping ability to recover the delay of schedule. Since the large scale of such spare capability might lead to the increase in cost, it is needed to investigate how to plan the system allowed for weather conditions reasonably. In the previous studies of cost estimation for CO2 marine transport and ocean storage, the rate of operation in total system was assumed as a constant value, and the necessary capacity of storage at the port was assumed as some specified days' amount of captured CO2 at the plant. In this study, the time series model of sea state through one year is generated for the hypothetical ocean storage site off Japan, based on the wind data observed with satellite remote sensing, and then the simulations of CO2 marine transport and operation on the sea are carried out considering the operational limit of sea state day by day. In this approach, the continuing bad weather days or the frequent occurrences of rough sea condition during the specific season are counted. In order to pursue higher efficiency of the operation on the sea, three kinds of system are applied for the simulations as; 1) CO2 carrier and release ship are used separately and moored in parallel for CO2 shift at the storage site, 2) CO2 carrier and release ship are used separately and moored tandem for CO2 shift, 3) ship is used as both a CO2 carrier and release ship. The third one would not need mooring and CO2 shift operations on the sea which are sensitive to the sea state, but would need long- and every-time operation of pipe handling. Finally, the results are assessed as the capital and running cost per CO2- tonne to be treated.","PeriodicalId":368672,"journal":{"name":"OCEANS 2008 - MTS/IEEE Kobe Techno-Ocean","volume":"68 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-04-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115568613","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}

{"title":"Estimation of oceanic crustal structure using receiver function","authors":"S. Tsujimoto, H. Mikada","doi":"10.1109/OCEANSKOBE.2008.4531068","DOIUrl":"https://doi.org/10.1109/OCEANSKOBE.2008.4531068","url":null,"abstract":"The estimation of oceanic crust structure is required to reveal the development history of Japanese island arcs and to estimate the limit of legal continental shelf. Refraction or reflection wave exploration is one of the methods for deep oceanic crust investigation, but these methods use only compressional wave or the depth component of a seismometer. Hence, it is needed to use shear wave or horizontal component of seismograms for more precise investigation to estimate the thickness of the oceanic crust. Receiver function is a function to estimate the interface of velocity change using shear wave from an earthquake without artificial sources. This study tries to apply receiver function analysis to the investigation using refraction wave not from an earthquake but artificial sources on the ground or sea surface. After the transformation of depth-horizontal coordinates into radial-tangential coordinates, the Ps converted wave can be observed clearly. We confirm the effect of the receiver function analysis as one of the methods of estimating velocity boundaries and its application to refraction seismic survey.","PeriodicalId":368672,"journal":{"name":"OCEANS 2008 - MTS/IEEE Kobe Techno-Ocean","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-04-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116047130","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}

{"title":"A New Weir Skimmer Test for an Oil Recovery Vessel Dr.Kaiyo","authors":"I. Fujita, M. Yoshie, K. Takezaki, K. Ozaki, H. Oda","doi":"10.1109/OCEANSKOBE.2008.4530996","DOIUrl":"https://doi.org/10.1109/OCEANSKOBE.2008.4530996","url":null,"abstract":"An advanced weir skimmer for spilled oil recovery has been developed by Kinki Regional Bureau, Ministry of Land Infrastructure and Transport Japan. The new skimmer has an oil/water separation mechanism embedded in it and succeeds in a high concentration oil recovery from the sea surface. It has been installed in a new oil recovery vessel Dr. Kaiyo in March 2007. Prior to its installation, the skimmer's oil recovery performance was closely evaluated by port and airport research institute (PARI) in a real scale oil spill test tank. The tank test has confirmed that the oil skimmer has excellent oil recovery performance, especially a high oil water ratio more than 80% even in severe sea condition. This paper gives mechanical description of the skimmer and detailed results of the full scale tank tests conducted by PARI as well as an overview of the vessel Dr.Kaiyo.","PeriodicalId":368672,"journal":{"name":"OCEANS 2008 - MTS/IEEE Kobe Techno-Ocean","volume":"50 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-04-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122753176","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}

{"title":"Using Airborne Hydrographic LiDAR To Support Mapping of California's Waters","authors":"J. Wilson","doi":"10.1109/OCEANSKOBE.2008.4530980","DOIUrl":"https://doi.org/10.1109/OCEANSKOBE.2008.4530980","url":null,"abstract":"A specialist team comprising academic, industry and government members is underway in a program that will ultimately lead to mapping of all 14,500 km2 of California's state waters from MHHW out to the three-nautical-mile boundary. The technical and scientific team is lead by California State Coastal Conservancy through a contract with California State University Monterey Bay (CSUMB), and includes principle investigators from the seafloor mapping Lab of CSUMB, Fugro Pelagos, Inc; the US geological survey's coastal and marine geology program; and moss landing marine Labs' center for habitat studies. The data acquisition program includes a seafloor mapping component that incorporates the latest multibeam echosounding and airborne LiDAR bathymetry technologies and a ground truth component that includes video transects and sampling. This presentation describes the comprehensive and high-resolution seafloor-mapping program, with a focus on integrating the airborne LIDAR component with the multibeam data. The airborne bathymetric LiDAR sensor is capable of providing beach and bluff topography, digital aerial imagery, nearshore bathymetry and nearshore seabed laser reflectance imagery. All LiDAR data will be integrated with deeper water acoustic data and ground truth data to ultimately support a three-tier level of data processing and analyses. The Tier 1 and Tier 2 products specified as requirements include a minimum of nine GIS data layers (ESRI compatible) with FGDC compliant metadata files. Two tier 3 interpretation example products are also being created: 1) an updated 1:100,000 essential fish habitat (EFH) interpretation map, and 2) a 1:24,000 geological quad map. The first portion of the California coast to be mapped extends from Punta Arena north of the golden gate, southward to Punta del Aflo Nuevo. This area was identified as a high priority during a workshop attended by statewide stakeholders. This ground-breaking program is funded by the California Ocean Protection Council through the California State Coastal Conservancy. The program manager was the Monterey Bay Sanctuary Foundation, working in collaboration with NOAA's National Marine Sanctuary Program. This presentation includes sections on the various technologies used, examples of results obtained to date, notes on planning the statewide mapping program, and a report on current program status. This major integrated mapping program along 1800 km of shoreline is establishing standards that can be applied to new regional coastal and offshore mapping for the management of marine resources.","PeriodicalId":368672,"journal":{"name":"OCEANS 2008 - MTS/IEEE Kobe Techno-Ocean","volume":"49 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-04-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122032511","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}

{"title":"Electric Power from Artificial Muscles","authors":"M. Waki, S. Chiba, R. Kornbluh, R. Pelrine, U. Kunihiko","doi":"10.1109/OCEANSKOBE.2008.4530961","DOIUrl":"https://doi.org/10.1109/OCEANSKOBE.2008.4530961","url":null,"abstract":"In this work, as a novel process for use of renewable energy, the authors would like to discuss the possibility of an artificial muscle actuator based on a dielectric electroactive polymer (elastomer). This highly efficient actuator can transform electric energy into mechanical energy (theoretical transformation efficiency of 80 to 90%) with a high energy density of 1.0 W/g. Using the reverse operation for this actuator, it is possible, with current materials, to obtain a maximum output of 0.4 J/g. With this new material, it is not impossible to dream of having an output on the order of 2.0 J/g.","PeriodicalId":368672,"journal":{"name":"OCEANS 2008 - MTS/IEEE Kobe Techno-Ocean","volume":"45 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-04-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129206631","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}

{"title":"Evaluation of Viscous Forces Acting on A Moving Body by Navier-Stokes Solver","authors":"E. P. Bangun, T. Utsunomiya","doi":"10.1109/OCEANSKOBE.2008.4530945","DOIUrl":"https://doi.org/10.1109/OCEANSKOBE.2008.4530945","url":null,"abstract":"A numerical method for the solution of the Navier-Stokes equations in the case of a moving body is presented. The fluid is assumed to be incompressible. A cell-based finite volume method for unstructured grids is applied as the numerical method. The method is applied to problems of flow around a floating body. A floating body with or without bilge keels undergoing roll motions with different roll angles are taken as model case. Evaluation of hydrodynamic coefficients due to viscous forces is conducted. The numerical results show that the roll-damping coefficients obtained by using the Navier-Stokes solver are larger than the radiation damping coefficients evaluated by the linear potential theory due to viscous and vortex effect.","PeriodicalId":368672,"journal":{"name":"OCEANS 2008 - MTS/IEEE Kobe Techno-Ocean","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-04-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123938330","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}

{"title":"Design of deep ocean submarine cable observation network for earthquakes and tsunamis","authors":"E. Araki, K. Kawaguchi, S. Kaneko, Y. Kaneda","doi":"10.1109/OCEANSKOBE.2008.4531071","DOIUrl":"https://doi.org/10.1109/OCEANSKOBE.2008.4531071","url":null,"abstract":"A scientific submarine cable network called DONET (Dense Ocean-floor Network System for Earthquakes and Tsunamis) is going to be built in the rupture area of Tonankai earthquake in the south of Kii-peninsula, Japan. By the DONET deployment in the seafloor, we expect significant improvement of location accuracy of micro earthquakes. Also, we expect to identify occurrence of slow slip event of moment magnitude of 6 in the seafloor. Observation of such events requires precision seismic and seafloor pressure measurement in wide dynamic range and broad frequency band for DONET observation sensors. We plan to combine broadband seismometer and strong motion accelerometer, quartz pressure gauge, a differential pressure gauge, and hydrophone installed in each observatory. To choose seismometers to be incorporated for the DONET observatory, we evaluated noise characteristics of seismometers of different kind in land vault. Also, we evaluated quartz pressure gauges for their long-term stability in seafloor environment.","PeriodicalId":368672,"journal":{"name":"OCEANS 2008 - MTS/IEEE Kobe Techno-Ocean","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-04-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114341175","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}

{"title":"Characteristics of Hydrodynamic Forces and Torque on Darrieus Type Water Turbines for Current Power Generation Systems with CFD Computations","authors":"T. Ikoma, K. Masuda, S. Fujio, H. Nakada, H. Maeda, C. Rheem","doi":"10.1109/OCEANSKOBE.2008.4531094","DOIUrl":"https://doi.org/10.1109/OCEANSKOBE.2008.4531094","url":null,"abstract":"This paper describes the drag coefficient and the lift coefficient of Darrieus type turbines, and also discusses accuracy of numerical calculations of Darrieus type water turbines with computational fluid dynamics (CFD) comparing with some results of model experiments by us. Corresponding Darrieus turbines are a vertical blade type. Objectives of this study are to investigate follows: 1) characteristics of hydrodynamic forces on a fixed blade with several attack angles, 2) characteristics of hydrodynamic forces and torques of fixed three blades, 3) rotation characteristics of the turbine without restoring loads and 4) the above things are confirmed and discussed with model experiments and CFD computations. Finally a method to improve the torque performance is investigated with optimization of attaching angles of blades. From the results, it is confirmed that CFD computations are useful and it is possible to improve torque performance with the blade element and the momentum combined theory.","PeriodicalId":368672,"journal":{"name":"OCEANS 2008 - MTS/IEEE Kobe Techno-Ocean","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-04-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114828804","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}