ULTIMO AGGIORNAMENTO BANCA DATI: 13/09/2024 13:00:57
A time-independent finite-difference method is developed to solve for the fully nonlinear waves past floating breakwaters. The numerical model is first verified by comparing the results of wave past submerged breakwater with existing data. The interaction between waves and floating breakwater is studied. ...
ABSTRACT: A numerical method for the analysis of dynamic responses of a floating body partly composed of permeable walls is presented. The proposed method is based on the conventional 3- dimensional singularity distribution method but a special care is taken for the treatment of permeable walls, through ...
ABSTRACT: This study was conducted to develop a new eco-technology for treating hyper-eut&phicated water. From A&i1 to October 1996&d February to August 1997, a system which consists of 5Ocm-long ropes to collect bivalves that are located between the sea surface and a depth of 1.5 m. The integrated ...
ABSTRACT: In this study, 1) persistent concentration of antibiotics in seawater, sedimentation particles and mud, 2) degradation characteristic of antibiotics in seawater under UV irradiation, and 3) accumulation of antibiotics in plankton cultivated in a medium containing antibiotics were investigated. ...
ABSTRACT: The authors proposed more appropriate the planning system of creating nursery ground by using 3-dimensional Euler- Lagrangian numerical model taking the results of field experiments into application. Furthermore we planned and located the new type of artificial reef which has the multi fimctions ...
ABSTRACT: The preliminary study of monitoring for turbid coastal waters using a high-resolution satellite sensor “Term/ASTER (Advanced Spaceborne Thermal Emission and Reflection Radiometer)” launched in December 1999 was examined. ASTER data, buoy data, and in-site water quality data (Sea surface temperature: ...
ABSTRACT: In this paper, the motion characteristics of some kinds of fishery cages are analyzed by experimental and numerical method. Circular and rectangular types are considered to investigate the difference of the hydrodynamic behaviors in waves and to find out the effective shape of the frame in ...
ABSTRACT: This paper presents a brief review of recent researches on environmental impact assessment for pumping-up and discharging deep seawater, which is performed as a part of a national project driven by Japan Ocean Industries Association (JOIA). These researches focus on several environmental ...
ABSTRACT: This paper presents a brief review of recent researches on deep ocean water applications in Japan. Firstly, various applications using deep ocean water, such as ocean thermal energy conversion, fresh water production, air conditioning/refrigeration, mariculture, agriculture, are summarized. ...
ABSTRACT A Mobile Offshore Base (MOB) is a very large floating platform comprised of serially connected modules. Previous ISOPE papers described the MOB research program, identified research spin-offs, and assessed technical feasibility in support of a military logistics mission. This paper highlights ...
Our aim is to model the dynamic behaviour of submerged flexible nets in any relative current. Due to both the discontinuous and highly flexible nature of the nets and the complexity of the flow through the mesh, this study involves both structure mechanics and fluid mechanics. We describe a numerical ...
ABSTRACT: An integrated database and geographic information system (GIS) ""Environmental Atlas of The White Sea"" has been created in cooperation between Petrozavodsk State University, Russia and Akvaplan-niva AS, Norway. Base maps and thematic data are among 15 topics currently included in the database. ...
ABSTRACT: The information of ship waves generated by a small vessel and the motions of a small boat subjected to these waves are very important to prevent the damage of the boat and the danger of passengers on board. This paper deals with ship waves generated by an actual small vessel and the motions ...
ABSTRACT An experiment on cubical submerged structure like artificial fish reef is conducted to determine the flow field and mechanisms of local scouring and resultant embedment. Moreover, a numerical scheme for three-dimensional flow field computation including- the vortex formations is developed. ...
ABSTRACT A role of internal tide in estuary-shelf water exchange is studied in Gokasho Bay, which is a drowned river valley estuary facing continental shelf of the Pacific Ocean. Thermistor chains and current meters were moored in and out of the bay for 15 days in the four seasons. The internal tide ...
ABSTRACT Ice floes are widely known to abrade surfaces of structures constructed in sea water areas where ice floes move actively. According to Janson''s research (1987) t) on concrete lighthouses in the Gulf of Bothnia, where sea ice movements are intense, the abrasion depth of several lighthouses ...
ABSTRACT The occurrence and level of contamination by butyltin compounds, tributyltin (TBT) and its degradation products, monobutyltin (MBT) and dibutyltin (DBT), in seawter, sediment, and biosamples collected from the south coast of Korea have been determined. To minimize any matrix effect both sediement ...
ABSTRACT The purpose of this study is to find the method by which we minimize the anti-function of development in the coastal region. We calculated the residual current after the construction of the sea dike in order to investigate the change of the tide and tidal current after the construction of ...
ABSTRACT The Zhaojiapu Seabeach - Shallow Water Area is rich in oil sources with developed reservoirs and structures, such as anticlines, faulted noses and buried hills etc. They are generally together to compose the complex - forms oil-gas pools which are with multiple oil-bearing strata series and ...
Abstract: This study reports on the results of the experiments on the arching condition of ice floes in the sea or rivers which have froze over. Knowing the conditions of arch formation by ice floes is valuable because the data can be used in deciding the span of bridges that will not form ice arches ...