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Collaborating Authors
Passenger
Real-Time Visualizations of Ocean Data Collected By The NORUS Glider In Svalbard, Norway
Medina, Daniel (Department of Computer Science and Department of Biological Sciences) | Moline, Mark (Department of Computer Science and Department of Biological Sciences) | Clark, Christopher (Department of Computer Science and Department of Biological Sciences) | Wood, Zoë J. (Department of Computer Science and Department of Biological Sciences)
ABSTRACT: Modern robotics and sensors have expanded the ability to collect science data in underwater settings. Oftentimes, the collected data are deposited into files and databases where they sit in their separate and unique formats. Without easy to use visualization tools, it is difficult to understand and interpret the information within these data sets. NORUS, the North America-Norway educational program, has a scientific focus on how climate-induced changes impact the living resources and ecosystems in the Arctic. In order to obtain the necessary science data, the NORUS program utilizes the Slocum Glider, a form of underwater robot. We present a compelling, efficient, and easy to use interactive system for visualizing large sets of science data collected by the Slocum Glider. This goal is obtained through the implementation of various methods taken from scientific visualization, real time rendering, and scattered data interpolation. Methods include visualizations of the surrounding terrain, the ability to map various science data to glyphs, control over color mapping, and scattered data interpolation. INTRODUCTION The oceans are an important focus of scientific study and exploration. They cover over 70% of the earth's surface, are a significant source of food for a large part of the planet, and due to the impact of global warming, are increasingly central to predicting how our climate will evolve during the next century. An ocean is a complex, highly interconnected environment. A full description of an ocean must include not just physical characteristics, such as temperature and currents, but chemical, biological, and even geological parameters. NORUS, the North America-Norway educational program, has a scientific focus on how climate-induced changes impact the living resources and ecosystems in the Arctic. In order to obtain the necessary science data, the NORUS program utilizes the Slocum Glider, a form of underwater vehicle or robot.
- Europe > Norway (0.81)
- North America > United States > New York (0.17)
- Transportation > Passenger (1.00)
- Transportation > Air (1.00)
- Information Technology > Visualization (0.90)
- Information Technology > Artificial Intelligence > Robots (0.74)
- Information Technology > Human Computer Interaction > Interfaces (0.69)
- Information Technology > Architecture > Real Time Systems (0.63)
Falling Behavior Simulation of A Standing Passenger On a High Speed Ship At the Collision Accident
Shibue, Tadashi (Biology Oriented Science and Technology, Kinki University) | Hayami, Takashi (Biology Oriented Science and Technology, Kinki University) | Sawai, Tohru (Biology Oriented Science and Technology, Kinki University) | Ohmasa, Mitushi (Biology Oriented Science and Technology, Kinki University) | Hirokawa, Noriyasu (Biology Oriented Science and Technology, Kinki University) | Nishi, Kenji (Biology Oriented Science and Technology, Kinki University)
INTRODUCTION: Some accidental collisions of high-speed ships have been reported to cause passenger's injury. The deceleration of high-speed ship after collision is very large because of its high velocity and its light weight. Passenger's body keeps moving at high-speed though the ship body stops rapidly after collision. When a passenger's body comes in contact with the floor or the wall, a big impact is caused to the passenger's body. High-speed ships are equipped with seat belts of two point support type, same to the aircrafts. However, even the passengers who installed the seat belt were injured at the accidents of high-speed ships. Moreover, the possibility of high-speed ship's collision with a floating wood is high, because the high-speed ship goes along the coast frequently. The safety measure at collision is required in addition to the measures, strengthening the watch by radar and watching, to avoid the occurrence of a collision. It is necessary to understand the behavior of passenger's body more in detail, to avoid the passenger's injury at accidents. Many research works have been carried out for the passengers in automobiles and trains (Maki T.1973, Igarashi M.et.al,1985, Shimamura M.et. al,1987, Omino K.et.al,1999, Shibue, T.et al, 2005 and Muramoto I. et.al, 2007), but few for the passengers in ships(Shibue, T.et.al, 2007 and 2009). Authors have carried out a series of numerical simulation to see the effects of collision angle on the seated passenger's falling behavior (Shibue, T. et.al, 2010). As results of the simulation, the following findings were obtained. 1. The rotative movement of the passenger's body has a major effects on the fall behavior. 2. The friction has large effects on the rotative movement of the passenger's body. 3. The increase of friction between the sole of shoes and the floor reduces the impact velocity of a passenger's head against the fore seat.
Development of the Ocean-going Underwater Glider With Independently Controllable Main Wings, SOARER
Arima, Masakazu (Department of Marine System Engineering, Osaka Prefecture University Sakai) | Ishii, Kazuo (Department of Brain Science and Engineering, Kyushu Institute of Technology) | Nassiraei, Amir A.F. (Department of Brain Science and Engineering, Kyushu Institute of Technology)
ABSTRACT: The authors are planning to realise three-dimensional multipoint and simultaneous measurement of ocean environment by swarm intelligent underwater vehicles. For this purpose, an ocean-going underwater glider with independently controllable main wings was developed and named ‘SOARER’. This paper deals with concept and detailed design of the SOARER glider. INTRODUCTION We are now facing global environmental problems, the energy and food crises. The ocean, which covers over 70% of the earth's surface, has the enormous potential to resolve these problems. In recent years, various kinds of autonomous underwater vehicles (AUVs) and remotely operated vehicles (ROVs) are actively involved in the front lines of ocean researches. These underwater vehicles are usually operated alone or in a small group, and thus it is difficult to understand wide area ocean information. On the other hand, thousands of floating buoys such as ‘ARGO float’ are a useful means for the global-scale measurement, but such kind of floating buoy cannot control its measuring sea area. Underwater glider is one of the most useful underwater vehicles. Typical underwater has no propulsive machinery such as thrustor and it has a buoyancy control device and a kind of centre-of-mass shifting device. Arima et al. developed a test bed vehicle of the underwater glider with independently controllable main wings, which can control its angle of incidence of both main wings independently. They demonstrated this enables to realise high performance of motion. The authors are planning to develop an ocean-going underwater glider with independently controllable main wings for the application of widerange and long-term ocean environment monitoring. This paper deals with the concept and detailed design of such an underwater glider. FUNDAMENTAL PRINCIPLE OF UNDERWATER GLIDER Gliding Mechanism of Underwater Glider Underwater glider has the capability to cruise under water by controlling its buoyancy and attitude without any propulsive machinery.
- Asia > Japan (0.69)
- North America > Trinidad and Tobago > Trinidad > Arima > Arima (0.27)
- Transportation > Passenger (1.00)
- Transportation > Air (1.00)
- Reservoir Description and Dynamics (1.00)
- Facilities Design, Construction and Operation > Offshore Facilities and Subsea Systems > Remotely operated vehicles (0.54)
- Data Science & Engineering Analytics > Information Management and Systems (0.47)
- Health, Safety, Environment & Sustainability > Environment (0.34)
ABSTRACT: This paper is going to present the numerical study for the prediction of the viscous cavitation flow around a cavitating hydrofoil. The cavitation is a very important issue for the performances of underwater hydrofoils and propellers. The cavity bubbles can result in the propeller thrust breakdown, vibrations, noises and erosion as they move to the high pressure zone and crash. Therefore, the phenomenon of the cavitation is also a very important research topic for ship hydrodynamics. In this paper, the RANS method for solving the cavitation flow is presented, and this RANS code is a finite volume method based on the pseudo compressibility scheme with a liquidvapor phase changed cavitation model. The present results of several operation conditions for a hydrofoil have been computed by the computational code, UVW. The liquid-vapor phase change cavitation model has been implemented into the computational code, UVW. The test case is a modified NACA66 hydrofoil, and this foil is commonly used for marine propellers. In this paper, the numerical cavitation model is going to be presented and discussed, and the problem in obtaining an accurate position of cavitation inception will be studied. The comparisons of calculated pressure distributions on the hydrofoil surface are investigated at small angle of attack for different cavitation numbers, and the cavity shapes on the hydrofoil are also compared to the experimental data for partial cavitation conditions. INTRODUCTION The cavitation is a very important issue for the performances of underwater hydrofoils and propellers. When the flow past the surface of marine propeller, the cavity bubbles will be generated at the low pressure zone where local pressure is lower than vapor pressure. The cavity bubbles can result in the propeller thrust breakdown, vibrations, noises and erosion as they move to the high pressure zone and crash.
- Transportation > Passenger (1.00)
- Transportation > Marine (1.00)
- Leisure & Entertainment > Sports > Sailing (1.00)
Comparative Study On the Results of 3D FE Analysis For Upright/Inclined Condition of Ro-Ro Passenger Ferry
Jeong, Young-Jin (Hull Design Team, Daewoo Shipbuilding & Marine Engineering Co.,Ltd) | Choi, Won-Hyuk (Hull Design Team, Daewoo Shipbuilding & Marine Engineering Co.,Ltd) | Woo, Je-Hyouk (Hull Design Team, Daewoo Shipbuilding & Marine Engineering Co.,Ltd) | Kim, Man-Soo (Hull Design Team, Daewoo Shipbuilding & Marine Engineering Co.,Ltd)
ABSTRACT: The purpose of the structural analysis for the upright condition and inclined condition is to investigate the structural strength of primary members under the internal loads with vertical acceleration and racking phenomenon respectively. The racking phenomenon is caused by the transverse forces induced by the transverse acceleration acting on wheeled cargos and accommodation equipments, when the number of transverse bulkheads is not sufficient to avoid such phenomenon. Two types of analysis methods, i.e. beam analysis and 3D FE analysis are generally applicable to the evaluation of structural strength. The objective of this study is to compare the structural responses from the beam analysis and the 3D FE analysis for a typical location of Ro- Ro passenger ferry and to propose a formula to correct the stress results from the beam analysis as close to the 3D FEA results as possible. INTRODUCTION When the vessel is under the racking effects as well as the upright condition, one of the main check points is bracketless joint between the side vertical beam and the deck transverse beam as indicated in Fig.1, which is subjected to combined forces of in transverse and vertical direction. The requirement for the scantlings of primary members including main check points is given in the Rules of Classification Society and these requirements are based on the load and resistance factor design (LRFD) or working stress design (WSD) using the allowable stress. Using the 3D FE model is perhaps should be the most reliable way to check critical points, but it has the disadvantage of time-consuming. So, the analysis method using the beam model is often used as a evaluation method for the structure strength. However, there are some difficulties in getting accurate results from the beam model in the case of the element taking shear distortion at the bracketless joint.