OCEANS'11 MTS/IEEE KONA最新文献_第10页

Implementation of optical plankton counter with embedded system for autonomous float 自主浮子嵌入式光学浮游生物计数器的实现

OCEANS'11 MTS/IEEE KONA Pub Date : 2011-12-19 DOI: 10.23919/OCEANS.2011.6107070

Dong Ho Lee, KyungWoon Lee, Ui-seok Jeong, J. Park

引用次数: 1

Path-loss prediction based on FDTD method and normal mode theory for underwater acoustic channel 基于时域有限差分法和正模理论的水声信道路径损耗预测

OCEANS'11 MTS/IEEE KONA Pub Date : 2011-12-19 DOI: 10.23919/OCEANS.2011.6107197

Yongjune Kim, I. Koh, Yongshik Lee

引用次数: 2

Renewable energy on the outer continental shelf off Hawaii: Implementation of a new program under the authority of the Bureau of Ocean Energy Management, Regulation and Enforcement 夏威夷外大陆架的可再生能源:在海洋能源管理、监管和执法局的授权下实施一项新计划

OCEANS'11 MTS/IEEE KONA Pub Date : 2011-12-19 DOI: 10.23919/OCEANS.2011.6107281

M. Hill

引用次数: 4

AUV hydrodynamics for survivability and controllability 水下航行器的生存性和可控性

OCEANS'11 MTS/IEEE KONA Pub Date : 2011-12-19 DOI: 10.23919/OCEANS.2011.6107155

J. Liou

引用次数: 4

Autonomous landing experiments with an underwater vehicle for multi-resolution wide area seafloor observation 多分辨率广域海底观测水下航行器自主着陆试验

OCEANS'11 MTS/IEEE KONA Pub Date : 2011-12-19 DOI: 10.23919/OCEANS.2011.6107117

M. Sangekar, B. Thornton, T. Nakatani, A. Bodenmann, T. Sakamaki, T. Ura

{"title":"Autonomous landing experiments with an underwater vehicle for multi-resolution wide area seafloor observation","authors":"M. Sangekar, B. Thornton, T. Nakatani, A. Bodenmann, T. Sakamaki, T. Ura","doi":"10.23919/OCEANS.2011.6107117","DOIUrl":"https://doi.org/10.23919/OCEANS.2011.6107117","url":null,"abstract":"The autonomous underwater vehicle has proven to be an important tool for study of the seafloor. Detailed seafloor analysis often requires wide area observations with high resolution information. Certain sensors require close proximity to the seafloor or contact, with stable footing to perform integrated measurements over a period of time. Such wide area high resolution surveys cannot be performed by a cruising or hovering type vehicle alone. In this research the authors propose a new class of AUV along with a survey technique in which an underwater vehicle can generate meter order resolution wide area maps of the seafloor, but at intermediate locations, obtain higher, centimeter order resolution information by lowering scanning speed and altitude and finally, by landing to obtain micrometer order resolution measurements or to perform integrated measurements at the same position. A new underwater vehicle with slight negative buoyancy has been developed which has hardware and software to perform landing on the seafloor. Since the seafloor can change abruptly and at short intervals, the reliability and functioning of such technology requires real-time seafloor classification for detection of suitable landing sites. A landing algorithm has been developed which uses laser profile data to calculate a landing vector coordinate for safe landing in realtime and this has been implemented on a newly developed landing vehicle. An autonomous landing system has been developed which uses this algorithm to perform landing operations. Experiments were conducted at a tank facility to demonstrate real-time computation of the landing algorithm and autonomous landing of the vehicle using the proposed system. Results from the landing experiments conducted are presented in this paper.","PeriodicalId":19442,"journal":{"name":"OCEANS'11 MTS/IEEE KONA","volume":"77 1","pages":"1-7"},"PeriodicalIF":0.0,"publicationDate":"2011-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82484265","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}

引用次数: 6

Change detection using Synthetic Aperture Sonar: Preliminary results from the Larvik trial 利用合成孔径声纳进行变化检测:Larvik试验的初步结果

OCEANS'11 MTS/IEEE KONA Pub Date : 2011-12-19 DOI: 10.23919/OCEANS.2011.6107272

O. Midtgaard, R. Hansen, T. O. Saebo, V. Myers, J. Dubberley, I. Quidu

引用次数: 28

Scattered acoustic intensity field measurements of a rigid motionless sphere and cylinder 刚性静止球和圆柱的散射声强场测量

OCEANS'11 MTS/IEEE KONA Pub Date : 2011-12-19 DOI: 10.23919/OCEANS.2011.6106902

R. J. Barton, Geoffrey R. Moss, Kevin B. Smith

引用次数: 0

Characterization of flow through an array of cylinders modeling Marine Hydrokinetic support structures 模拟海洋水动力支撑结构的圆柱阵列流动表征

OCEANS'11 MTS/IEEE KONA Pub Date : 2011-12-19 DOI: 10.23919/OCEANS.2011.6107158

D. Riley, M. Beninati, M. Krane, A. Fontaine

引用次数: 0

Finite element modeling of surface layer circulation in the Caspian Sea 里海表层环流的有限元模拟

OCEANS'11 MTS/IEEE KONA Pub Date : 2011-12-19 DOI: 10.23919/OCEANS.2011.6106903

Ehsan Sadighrad, F. Ahmadi-Givi, A. Bidokhti

{"title":"Finite element modeling of surface layer circulation in the Caspian Sea","authors":"Ehsan Sadighrad, F. Ahmadi-Givi, A. Bidokhti","doi":"10.23919/OCEANS.2011.6106903","DOIUrl":"https://doi.org/10.23919/OCEANS.2011.6106903","url":null,"abstract":"The ocean thermohaline circulation is caused by water density contrasts. This circulation has large capacity of carrying heat around the globe and it thus affects the energy budget and further affects the climate. Henry Stommel's (1958) abyssal circulation article contained the first theoretical analysis of the deep thermohaline circulation (THC). Due to Stommel's reasoning the incoming heat flux via the sun's radiation is stirred downward by wind and the thermal convection, and heats up the waters down to the thermocline and that this subsurface source of heat must be offset by a source of cold if the ocean is not to become continuously warmer. The resulting flow pattern is still used as the zero-order circulation of the deep oceans of the world. Since Caspian Sea is the world's largest inland body of salty water, therefore the study of circulation pattern in this sea for determination of pollution propagation and sediment transport is important. This study is based on a numerical model for prediction of a 2-D behavior of the Caspian Sea circulation due to the effect of uniform surface wind force and density gradients. The model is based on the equations of Navier-Stokes, salinity, and heat applying finite element method. It is assumed that the dominant surface wind is in the north-west direction. Simulation results include flow pattern of the circulation, relative vorticity, and density changes. The subdomain is partitioned into tetrahedral mesh elements and hence, the boundaries are partitioned into tetrahedral boundary elements. The specifications of medium such as fluid velocity under wind stress, inward heat flux, heat capacity of fluid, thermal conductivity, heat, and salinity diffusion coefficients are mentioned. The results of simulation and water circulation show that there are counterclockwise circulations in the South and North Caspian and clockwise circulations in the Middle Caspian. Relative vorticity, circulation and density pattern are presented and at the end some suggestions are made to obtain the results similar to reality.","PeriodicalId":19442,"journal":{"name":"OCEANS'11 MTS/IEEE KONA","volume":"82 1","pages":"1-10"},"PeriodicalIF":0.0,"publicationDate":"2011-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89665769","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}

引用次数: 0

The value of peer-to-peer knowledge transfer for engaging pacific northwest tribes in stem education and oceanographic studies 对等知识转移对太平洋西北部落参与stem教育和海洋学研究的价值

OCEANS'11 MTS/IEEE KONA Pub Date : 2011-12-19 DOI: 10.23919/OCEANS.2011.6107244

J. Newton, J. Apple

{"title":"The value of peer-to-peer knowledge transfer for engaging pacific northwest tribes in stem education and oceanographic studies","authors":"J. Newton, J. Apple","doi":"10.23919/OCEANS.2011.6107244","DOIUrl":"https://doi.org/10.23919/OCEANS.2011.6107244","url":null,"abstract":"Students from Native American tribes in the Pacific Northwest United States are under-represented in ocean studies despite tribes' strong cultural ties to the sea for thousands of years. Tribes with lands bordering seawater and who currently use this environment are numerous in the Puget Sound region. Yet entrainment of tribal students into ocean sciences higher education is lacking. Through efforts that span and integrate several programs, we have initiated several successful practices to understand and break through some of the barriers to improve this status. Some solutions are quite straightforward, but not obvious if Native American cultural awareness is not appreciated. One highly successful practice has been use of peer-to-peer knowledge transfer. We have also found that including sampling over the full spectrum of the pelagic ecosystem has been successful. Native American students and their communities are attracted to this work because the data are ecosystem inclusive (water to whales), the content is place-based, and the learning environment focuses on an experiential, student-led, inquiry-based approach - all of which resonate with the Native culture. The utility of this perspective as a contribution to STEM research is obvious. We seek to share our lessons learned with the ocean community to foster a wider and more diverse participation in ocean science.","PeriodicalId":19442,"journal":{"name":"OCEANS'11 MTS/IEEE KONA","volume":"37 1","pages":"1-3"},"PeriodicalIF":0.0,"publicationDate":"2011-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84124642","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}

引用次数: 1