Journal articles: 'La Coryphène (Laboratory ship)'

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Pokusaev, Mikhail Nikolaevich, Sergey Vladimirovich Vinogradov, Konstantin Olegovich Sibryaev, and Maxim Michailovich Gorbachev. "Experience in creating laboratory of ship auxiliary mechanisms for training marine engineers in Astrakhan State Technical University." Vestnik of Astrakhan State Technical University. Series: Marine engineering and technologies 2020, no. 1 (February 17, 2020): 22–30. http://dx.doi.org/10.24143/2073-1574-2020-1-22-30.

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The article focuses on the functional capabilities, technical characteristics and bench composition of the laboratory of ship auxiliary mechanisms, which was created at the Department of Operation of Water Transport at the Astrakhan State Technical University (ASTU) for training marine engineers. The laboratory provides the students with professional competencies in such aspects of the mechanical engineer’s operation as ship turbo machines, ship auxiliary mechanisms and systems, automatic control systems, operation of ship boiler rooms and steam generating plants, etc. There have been presented the pictures of laboratory test benches for testing the P01 ship steering machine and ЯШ-2Р anchor mooring pin, РCC-6.3/10 ship fan, TKР-700 turbo compressor, gear fuel pump Ш5-25-3Б, prototypes of TГ-16M gas turbine generator and ГTД-16M gas turbine engine. Using the laboratory test benches for auxiliary mechanisms and systems helps to both consolidate the theory and gain the new practical knowledge on the design, operation principles and testing skills of the ship steering machine, deck equipment, ventilation systems gear pumps, turbochargers, etc. It has been stated that all the laboratory facilities, except for the GD-IN model (facilities for studying the pump operation and constructing pressure-flow characteristics), were developed and assembled by the students and teachers on the basis of the real ship equipment. The laboratory tests are based on regulatory and technical documents: the rules of the Russian Maritime Register of Shipping, machine operating instructions, relevant GOSTs, guidance and regulatory documents. Building the laboratory of auxiliary mechanisms and systems and optimizing the time for practical and laboratory training of ship mechanical engineers at ASTU were carried out in accordance with the requirements of the new educational standard GEF 3++ of higher education and the International Convention on Training and Certification of Sailors and Watchkeeping (The Manila amendments to the STCW Convention and Code).

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Ai, Run, Mu Xi Lei, Zheng Bao Lei, and Bi Feng Ou. "The Safety Monitoring System of Ship/Bridge Crash Testing Laboratory." Advanced Materials Research 255-260 (May 2011): 467–71. http://dx.doi.org/10.4028/www.scientific.net/amr.255-260.467.

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In order to ensure the safety of the staff and the property of our laboratory, and guarantee the ship/bridge crash test conducted safely and smoothly, we adopt the safety monitoring system to supervise the whole ship/bridge crash testing laboratory and to be early warning, under the background of special application of ship/bridge crash testing laboratory. According to the actual site of crash testing laboratory, we choose the most suitable technology and operating principle to satisfy the request of ship/bridge crash testing laboratory. At the case that we do not need to increase the number of camera excessively, we can achieve the maximum coverage of the field of view by choosing the multi-function camera and designing the layout of it, and we will take advantage of the broadcasting alarm system to reach the purpose of keeping the safety of our laboratory. The results of actual application show that the staffs in the monitoring room can take the whole laboratory under their controls if we make use of this kind of safety monitoring system of ship/bridge crash testing laboratory, and we can fully protect the safety of the staff and the property of our laboratory. For the pretty good stableness and capacity of resisting disturbance, the system can greatly satisfy the request of keeping safety and early alarm.

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YANG, Yu Feng, and Ming Kui Feng. "A Comprehensive Experimental Practice for Ship Bridge Resource Management Training Based on Ship Handling Simulator." Advanced Materials Research 989-994 (July 2014): 5423–26. http://dx.doi.org/10.4028/www.scientific.net/amr.989-994.5423.

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There is short in the number of large ship handling simulator and it has high failure in BRM training. They could not remain for a long time in the laboratory for teachers qualified with captain and highly educated full-time laboratory personnel. Marine institutions begin to carry out practical teaching reform for these problems, which make people to work hand with policy support and scientific and rational evaluation mechanisms, innovative training teaching methods and establish an objective assessment criteria. By BRM training students enhance the ship's emergency response, role awareness and situational awareness, which have important practical significance to enhance navigational safety and strengthen risk awareness.

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Barreau, Jean-Baptiste, Florian Nouviale, Ronan Gaugne, Yann Bernard, Sylviane Llinares, and Valérie Gouranton. "An Immersive Virtual Sailing on the 18th-Century Ship Le Boullongne." Presence: Teleoperators and Virtual Environments 24, no. 3 (July 1, 2015): 201–19. http://dx.doi.org/10.1162/pres_a_00231.

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The work presented in this article is the result of collaboration between historians and computer scientists whose goal was the digital reconstitution of Le Boullongne, an 18th-century merchant ship of La Compagnie des Indes orientales.1 This ship has now disappeared and its reconstitution aims at understanding onboard living conditions. Three distinct research laboratories have participated in this project so far. The first, a department of naval history, worked on historical documents, especially the logbooks describing all traveling events of the ship. The second, a research laboratory in archaeology, archaeoscience, and history, proposed a 3D model of the ship based on the original naval architectural plans. The third, a computer science research laboratory, implemented a simulation of the ship sailing in virtual reality.

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Zhang, Hai Peng, Xin Gang Chen, Chen Yang Ao, and Wen Chao Gong. "Experimental Verification of the Suppression Effect of Ship Shaft-Rate Electric Field." Applied Mechanics and Materials 527 (February 2014): 172–75. http://dx.doi.org/10.4028/www.scientific.net/amm.527.172.

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To reduce the impact of shaft-rate electric field (SRE) on the concealment of the ship, The electric field immunity test is simulated with the laboratory scale model ship based on the analysis of the energy source of SRE. Experimental results show that the ship SRE can be suppressed effectively by the system, and the concealment of the ship is enhanced.

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Richter, Adrian, Elizabeth Sierocinski, Stephan Singer, Robin Bülow, Carolin Hackmann, Jean-François Chenot, and Carsten Oliver Schmidt. "The effects of incidental findings from whole-body MRI on the frequency of biopsies and detected malignancies or benign conditions in a general population cohort study." European Journal of Epidemiology 35, no. 10 (August 29, 2020): 925–35. http://dx.doi.org/10.1007/s10654-020-00679-4.

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Abstract Magnetic resonance imaging (MRI) yields numerous tumor-related incidental findings (IFs) which may trigger diagnostics such as biopsies. To clarify these effects, we studied how whole-body MRI IF disclosure in a population-based cohort affected biopsy frequency and the detection of malignancies. Laboratory disclosures were also assessed. Data from 6753 participants in the Study of Health in Pomerania (SHIP) examined between 2008 and 2012 were utilized. All underwent laboratory examinations and 3371 (49.9%) a whole-body MRI. Electronic biopsy reports from 2002 to 2017 were linked to participants and assigned to outcome categories. Biopsy frequency 2 years pre- and post-SHIP was investigated using generalized estimating equations with a negative-binomial distribution. Overall 8208 IFs (laboratory findings outside reference limits: 6839; MRI: 1369) were disclosed to 4707 participants; 2271 biopsy reports belonged to 1200 participants (17.8%). Of these, 938 biopsies occurred pre-SHIP; 1333 post-SHIP (event rate/100 observation years = 6.9 [95% CI 6.5; 7.4]; 9.9 [9.3; 10.4]). Age, cancer history, recent hospitalization, female sex, and IF disclosure were associated with higher biopsy rates. Nonmalignant biopsy results increased more in participants with disclosures (post-/pre-SHIP rate ratio 1.39 [95% CI 1.22; 1.58]) than without (1.09 [95% CI 0.85; 1.38]). Malignant biopsy results were more frequent post-SHIP (rate ratio 1.74 [95% CI 1.27; 2.42]). Biopsies increased after participation in a population-based cohort study with MRI and laboratory IF disclosure. Most biopsies resulted in no findings and few malignancies were diagnosed, indicating potential overtesting and overdiagnosis. A more restrictive policy regarding IF disclosure from research findings is required.

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Morency-Potvin, Philippe, David N. Schwartz, and Robert A. Weinstein. "Antimicrobial Stewardship: How the Microbiology Laboratory Can Right the Ship." Clinical Microbiology Reviews 30, no. 1 (December 14, 2016): 381–407. http://dx.doi.org/10.1128/cmr.00066-16.

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SUMMARY Antimicrobial stewardship is a bundle of integrated interventions employed to optimize the use of antimicrobials in health care settings. While infectious-disease-trained physicians, with clinical pharmacists, are considered the main leaders of antimicrobial stewardship programs, clinical microbiologists can play a key role in these programs. This review is intended to provide a comprehensive discussion of the different components of antimicrobial stewardship in which microbiology laboratories and clinical microbiologists can make significant contributions, including cumulative antimicrobial susceptibility reports, enhanced culture and susceptibility reports, guidance in the preanalytic phase, rapid diagnostic test availability, provider education, and alert and surveillance systems. In reviewing this material, we emphasize how the rapid, and especially the recent, evolution of clinical microbiology has reinforced the importance of clinical microbiologists' collaboration with antimicrobial stewardship programs.

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MATUSIAK, J., and T. MIKKOLA. "Recent developments in the field of ship hydrodynamics at the Ship Laboratory of Helsinki University of Technology." Archives of Civil and Mechanical Engineering 8, no. 1 (January 2008): 59–68. http://dx.doi.org/10.1016/s1644-9665(12)60267-2.

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Latorre, R. "Design of the University of New Orleans Ship-Offshore University Laboratory for Offshore Industry Support." Journal of Energy Resources Technology 110, no. 3 (September 1, 1988): 133–40. http://dx.doi.org/10.1115/1.3231372.

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On July 23, 1987, the University of New Orleans (UNO) dedicated its new Engineering Building, which houses a 38.3 m×4.57 m×0–2.134 m deep ship-offshore university laboratory tow tank. This paper covers the initial stages of the project and summarizes the towing tank design for ship-offshore testing. The tank is configured for three purposes: 1) conventional ship research in deep water with calm water or waves; 2) offshore structure testing with provision for observation and anchoring; 3) shallow water research in calm water, current, and waves.

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Normile, D. "OCEAN DRILLING: Japan's New Ship Sets Standard as Modern, Floating Laboratory." Science 307, no. 5715 (March 11, 2005): 1552–53. http://dx.doi.org/10.1126/science.307.5715.1552.

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Briggs, Michael J., Andrew L. Silver, and Paul J. Kopp. "Probabilistic Model for Predicting Ship Underkeel Clearance: Field and Laboratory Validation." Coastal Engineering Journal 56, no. 2 (June 2014): 1450010–1. http://dx.doi.org/10.1142/s0578563414500107.

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Adler, Antony. "The Ship as Laboratory: Making Space for Field Science at Sea." Journal of the History of Biology 47, no. 3 (October 12, 2013): 333–62. http://dx.doi.org/10.1007/s10739-013-9367-7.

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Kotinis, Miltiadis, and Michael G. Parsons. "Hydrodynamics of the Ballast-Free Ship Revisited." Journal of Ship Production and Design 26, no. 04 (November 1, 2010): 301–10. http://dx.doi.org/10.5957/jspd.2010.26.4.301.

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In order to clarify the existence and amount of a required propulsion power reduction possible with the efficient use of the Ballast-Free Ship concept on a Seaway-size bulk carrier, additional experimental and computational hydrodynamics studies were undertaken during the past year. Experimental studies performed in the University of Michigan Marine Hydrodynamics Laboratory (MHL) are described. Computational fluid dynamics (CFD) investigations performed using Star-CCMþ at both model and full scale are also presented.

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Kowalski, Jerzy, and Wieslaw Tarelko. "NOx emission from a two-stroke ship engine: Part 2 – Laboratory test." Applied Thermal Engineering 29, no. 11-12 (August 2009): 2160–65. http://dx.doi.org/10.1016/j.applthermaleng.2008.06.031.

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Imchen, Temjensangba. "Marine Macroalgae: Prospective Hitchhikers of Ship Ballast." ASEAN Journal on Science and Technology for Development 35, no. 1-2 (September 15, 2018): 43–47. http://dx.doi.org/10.29037/ajstd.472.

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Invasive alien species, on successful establishment, can displace native species. The threat of invasive species arises in view of their ability to outcompete and destabilize native biodiversity. Invasive species are found across all taxonomic groups of plants, animals and microorganisms. The green macroalga Ulva flexuosa has a potential to become invasive and this species was investigated for its hitchhiking potential under laboratory conditions. Zoospores of U. flexuosa were maintained at 4°C for nearly 10 months in the dark. Recruitment potential of zoospores after dark stress was tested in a modified Provasoli medium under optimal laboratoryconditions. The success rate of zoospore recruitment was 61%. The paper describes the transfer potential through shipping activities by correlating the Ulva zoospores recruitment potential and survivability.

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Arsy, Sunu, and Bayu Murti. "Evaluasi Keselamatan Kerja Listrik Laboratorium Permesinan Kapal Universitas Maritim AMNI Semarang Dengan Metode Analitycal Network Process (ANP)." Dinamika Bahari 2, no. 1 (May 18, 2021): 28–38. http://dx.doi.org/10.46484/db.v2i1.253.

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In the operation of electrical components in the ship engineering laboratory of the Maritime University of AMNI Semarang, various kinds of protection are needed. Errors in installing and operating electrical equipment can reduce protection. This protection aims to improve the safety of electrical work in ship engineering laboratories. And in the application of electrical work safety, it is necessary to evaluate based on the 2000 Electrical Installation General Requirements standard (PUILL 2000). The purpose of this study was to evaluate the use of the laboratory of the Maritime University of AMNI Semarang in the aspect of work safety. Based on the results of the evaluation, the criteria for electrical work safety are determined, namely: protection for safety, protection from overvoltages and currents, protection from thermal effects, and protection from fault currents. After the evaluation was carried out, alternatives were found to improve electrical safety: standard operating procedure (SOP), an inspection of cable installations, checking MCB panels and switches. The criteria and alternatives obtained then processed using the software super decision ver.2.10.0 with the Analytical Network Process (ANP) method so that the priority results of electrical safety improvements in the ship engineering laboratory of AMNI Maritime University Semarang are: repair of SOP 63.7%, cable installation 25.8%, MCB panel, and 10.5% switch.

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Belore, R. "USE OF HIGH-PRESSURE WATER MIXING FOR SHIP-BASED OIL SPILL DISPERSING." International Oil Spill Conference Proceedings 1987, no. 1 (April 1, 1987): 297–302. http://dx.doi.org/10.7901/2169-3358-1987-1-297.

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ABSTRACT This paper discusses a project funded by Canada's Environmental Studies Revolving Fund to assess the potential of high-pressure water jets in assisting the chemical dispersion of oil at sea. Full-scale laboratory tests were conducted using 0.5-mm thick, fresh Alberta Sweet Mixed Blend crude oil treated with Corexit 9527 dispersant applied from an overhead spray boom at a dispersant-to-oil ratio of 1: 100. The effects on dispersion efficiency of mixing jet pressure, mixing jet flow rate, jet standoff distance, and vessel speed were evaluated. Based on the test results, specifications for a practical high-pressure water jet system have been suggested. The system would operate with a nozzle pressure of 7,000 kPa, a flow rate of 55 L/min per nozzle, and nozzles positioned about 0.6 m from the water surface. In laboratory tests such a system was capable of dispersing 80 to 100 percent of the surface slick, whereas similar tests with the well-known Warren Spring Laboratory breaker board system resulted in only a 10 percent dispersion.

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Knight, Sarah, Nicholas Morley, Dónal Leech, and Rachel Cave. "Mobile Voltammetric Laboratory for Ship-Board and Shore-Based Analyses of Dissolved Copper." Environmental Chemistry 3, no. 6 (2006): 450. http://dx.doi.org/10.1071/en06047.

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Environmental Context. Determining concentrations of dissolved copper in seawater is of interest, because copper (i) affects the health of aquatic biota, and (ii) has the potential to act as a water mass tracer, a marker which can be used to follow the movement of water in oceans. In situ analyses of copper and other trace metals in seawater have become increasingly popular, because they circumvent potential contamination problems associated with sample collection, storage, and transport to off-site analysis locations. This paper describes the assembly of a low-cost, mobile laboratory utilizing adsorptive cathodic stripping voltammetry (AdCSV) for the real-time determination of total dissolved copper in surface waters. Abstract. The main advantages of using a mobile laboratory for the real-time analyses of copper in surface waters over classical discrete sampling include a reduction in the risk of sample contamination and significant savings in both time and money to the analyst. This paper outlines the development of a portable voltammetric laboratory, capable of deployment from ships or road vehicles, and an experimental method for the real time analysis of total dissolved copper in surface waters. It has been tested in estuarine and coastal waters to the west of Ireland and has proved suitable for the analysis of both fresh and marine waters. The system includes a trace metal-free sampling fish (for shipboard sampling), in-line filtration and UV-digestion units, and a voltammetric analyzer and electrode controlled by a portable PC. Analysis of samples is completed using adsorptive cathodic stripping voltammetry (AdCSV). Using this portable AdCSV laboratory, the high sample throughput – approximately three per hour with standard additions completed on every sample – means that for ship-board surveys good spatial coverage is possible without the need for time-consuming station stops. For van-based tidal surveys, the portable AdCSV laboratory is both straightforward and low in cost to deploy.

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Patil, Neha Sunil, Awanish Chandra Dubey, and V. Anantha Subramanian. "Fin based active control for ship roll motion stabilization." MATEC Web of Conferences 272 (2019): 01026. http://dx.doi.org/10.1051/matecconf/201927201026.

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Ship roll motion control is important for vessels engaged in oceanographic research activities and this paper focuses on the design of a controller for fin based roll motion stabilization of a Coastal Research Vessel (CRV). Based on the geometry of a pair of actuator fins installed at the midship of the vessel, the hydrodynamic coefficients are calculated for the vessel including the fin lift capacity. The wave disturbances are simulated as a sine time series. The objective is to design a Linear Quadratic Regulator (LQR), a state feedback controller and obtain the performance of the system. The larger objective is to implement the system eventually in laboratory scale physical simulations in wave environment. This paper primarily presents the design of the control system and evaluation through Simulink in Matlab environment. The global cost function of the system is minimized by precision tuning of the two control parameters (or weighting matrices), Q and R. The system analysis is done using frequency domain and state space approach. The simulation results show that the natural frequency and roll response closely match with the response of the physical model (CRV) in laboratory environment, as observed during the experimental study. The proposed control system is compared with a conventional PID controller. The simulation results demonstrate the effectiveness of the designed roll motion stabilization system with significant roll reduction over the operational range of the vessel.

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Skjetne, Roger, Thor I. Fossen, and Petar V. Kokotović. "Adaptive maneuvering, with experiments, for a model ship in a marine control laboratory." Automatica 41, no. 2 (February 2005): 289–98. http://dx.doi.org/10.1016/j.automatica.2004.10.006.

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Sergeev, D. A., A. A. Kandaurov, and A. S. Suvorov. "Laboratory modeling of hydrodynamic instability and sound generation processes in the ship NPS." Journal of Physics: Conference Series 1683 (December 2020): 022042. http://dx.doi.org/10.1088/1742-6596/1683/2/022042.

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Meng, Xiangwei, Xue-ping Gao, Wen-zhong Zhang, and Yun-peng Jiang. "EXPERIMENTAL FORMULA FOR THE WAVE-INDUCED SHIP MOORING FORCE." Coastal Engineering Proceedings 1, no. 32 (January 19, 2011): 61. http://dx.doi.org/10.9753/icce.v32.waves.61.

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The wave force dose not considered at the formula of mooring ship cable force in the Load Code for Harbor Engineering[JTJ215-98]. This brought the inconvenience to the calculation of designed cable force for mooring ship. By means of analysis for the laboratory model test result of mooring ship cable force under wave effect, Wave force formula of mooring ship under wave effect was gained. This formula well reflected the influence of ship size, ship load , ship rolling period, ship pitch period, wave period and wave height. The formula can be used in the calculation of standard value of mooring ship cable force under the wave effection, also it can be used to instruct the wave model test for mooring ship. References Zhang Ri-xiang. Liu Zhong-bo. Zhang Ning-chuan. 2003 .An Experimental Study on the Mooring Line Forces & Impact Forces of a Moored Ship Under the Combined Action of Wind,Wave and Current [J].,China offshore Platform, (01).15-18. Li Yan. Zheng Bao-you.Gao Feng. Meng Xiang-wei.2007.Model test study on the impact forces and mooring line forces of a moored ship under the combined action of wave and current [J].;The Ocean Engineering, (02).57-63. Ministry of transport of the People's Republic of China(1998).The Load Code for Harbor Engineering(JTJ215-98). [S]. Jiang Qing. Ge Hong-zheng.Xie Peng.2007.Influence of Ship's Type and Tonnage on the Ship's Mooring Force [J]. Port & Waterway Engineering, (09).51-59. Wu Xiuhuan. 1999.Ship and maneuverability and seakeeping [M]. Ministry of transport of the People's Republic of China. p220. Zhang Wen-zhong. Etc.(2006): Model test of Mooring LNG ship at Jiangsu Provence, Tianjin Port Engineering Institute Ltd. of CCCC.

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Hussey, Sean M., Phillip J. Dukette, Scott H. Dunn, Toinette J. Evans, Natalie Y. Oakes, Todd D. Gleeson, and Timothy F. Donahue. "The 2010 Haiti Earthquake: A Pathology Perspective Aboard the USNS Comfort." Archives of Pathology & Laboratory Medicine 135, no. 4 (April 1, 2011): 417–21. http://dx.doi.org/10.5858/2010-0182-sa.1.

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Abstract The US Navy hospital ship USNS Comfort played an integral role in the initial phases of Operation Unified Response–Haiti following the devastating earthquake that struck near Port-Au-Prince, Haiti, on January 12, 2010. Deployed to Haiti from its home in Baltimore, Maryland, just 4 days after the earthquake, the USNS Comfort would become the region's primary tertiary casualty receiving center for 6 weeks. The pathology and laboratory department staff onboard the ship helped support the mission and experienced unique mass casualty/disaster relief scenarios while underway. This article reviews the accounts of the core laboratory, microbiology, anatomic pathology, and blood bank divisions on the USNS Comfort from the chaotic first few weeks to the final patient discharge 40 days after Operation Unified Response–Haiti began.

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Han, S. L., and Takeshi Kinoshita. "Stochastic Inverse Identification of Nonlinear Roll Damping Moment of a Ship Moving at Nonzero-Forward Speeds." Mathematical Problems in Engineering 2012 (2012): 1–22. http://dx.doi.org/10.1155/2012/769385.

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The nonlinear responses of ship rolling motion characterized by a roll damping moment are of great interest to naval architects and ocean engineers. Modeling and identification of the nonlinear damping moment are essential to incorporate the inherent nonlinearity in design, analysis, and control of a ship. A stochastic nonparametric approach for identification of nonlinear damping in the general mechanical system has been presented in the literature (Han and Kinoshits 2012). The method has been also applied to identification of the nonlinear damping moment of a ship at zero-forward speed (Han and Kinoshits 2013). In the presence of forward speed, however, the characteristic of roll damping moment of a ship is significantly changed due to the lift effect. In this paper, the stochastic inverse method is applied to identification of the nonlinear damping moment of a ship moving at nonzero-forward speed. The workability and validity of the method are verified with laboratory tests under controlled conditions. In experimental trials, two different types of ship rolling motion are considered: time-dependent transient motion and frequency-dependent periodic motion. It is shown that this method enables the inherent nonlinearity in damping moment to be estimated, including its reliability analysis.

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Jiao, Jialong, Huilong Ren, Shuzheng Sun, and Christiaan Adika Adenya. "Experimental Investigation of Wave-Induced Ship Hydroelastic Vibrations by Large-Scale Model Measurement in Coastal Waves." Shock and Vibration 2016 (2016): 1–14. http://dx.doi.org/10.1155/2016/9296783.

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Ship hydroelastic vibration is an issue involving mutual interactions among inertial, hydrodynamic, and elastic forces. The conventional laboratory tests for wave-induced hydroelastic vibrations of ships are performed in tank conditions. An alternative approach to the conventional laboratory basin measurement, proposed in this paper, is to perform tests by large-scale model measurement in real sea waves. In order to perform this kind of novel experimental measurement, a large-scale free running model and the experiment scheme are proposed and introduced. The proposed testing methodology is quite general and applicable to a wide range of ship hydrodynamic experimental research. The testing procedure is presented by illustrating a 5-hour voyage trial of the large-scale model carried out at Huludao harbor of China in August 2015. Hammer tests were performed to identify the natural frequencies of the ship model at the beginning of the tests. Then a series of tests under different sailing conditions were carried out to investigate the vibrational characteristics of the model. As a postvoyage analysis, load, pressure, acceleration, and motion responses of the model are studied with respect to different time durations based on the measured data.

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Gaidai, Oleg, Gaute Storhaug, and Arvid Naess. "Extreme Value Statistics of Large Container Ship Roll." Journal of Ship Research 60, no. 02 (June 1, 2016): 92–100. http://dx.doi.org/10.5957/jsr.2016.60.2.92.

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The paper describes a method for prediction of large container ship extreme roll angles occurring during sailing in harsh weather. Rolling is coupled with other ship motions and exhibits highly nonlinear behavior. Risk of losing containers due to a large roll is primary concern for ship transport. Because of non-stationarity and complicated nonlinearities of both waves and ship motions, it is a considerable challenge to model such a phenomenon. In case of extreme motions, the role of nonlinearities dramatically increases, activating effects of second and higher order. Moreover, laboratory tests may also be questioned because of the scaling and the sea state choice. Therefore, data measured on actual ships during their voyages in harsh weather provide a unique insight into statistics of ship motions. The aim of this work is to benchmark state of art method, which makes it possible to extract the necessary information about the extreme response from onboard measured time histories. The method proposed in this paper opens up the possibility to predict simply and efficiently both short- and long-term extreme response statistics.

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Parsons, Michael G., and Klaus-Peter Beier. "Microcomputer Software for Computer-Aided Ship Design." Marine Technology and SNAME News 24, no. 03 (July 1, 1987): 246–64. http://dx.doi.org/10.5957/mt1.1987.24.3.246.

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The rapid evolution of the microcomputer has changed the software needs of today's naval architects. The Department of Naval Architecture and Marine Engineering at The University of Michigan has been a leader in the application of computers in ship design education. The computer environment readily available to the department's students has changed dramatically in the past few years with the evolution of the Computer-Aided Marine Design Laboratory within the department and the creation of the Computer Aided Engineering Network (CAEN) within the College of Engineering. The microcomputer facilities available to the students are briefly described. To fully integrate this capability into the department's curriculum, a coordinated suite of computer-aided ship design software has been developed for use on the Macintosh and IBM-PC/XT/AT microcomputers provided for the students. To support the use of this and other software on a wide range of computers, a portable, device-independent computer graphics subprogram package M-PLOT has been developed. The educational philosophy behind this design software and its scope, capabilities, and use in ship design education are described. Examples of the use of selected programs are presented to illustrate these capabilities. Plans for further work are outlined. The effort is well toward the goal of a complete, microcomputer-based ship design software environment.

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Schultz, M. P., J. A. Finlay, M. E. Callow, and J. A. Callow. "Three Models to Relate Detachment of Low Form Fouling at Laboratory and Ship Scale." Biofouling 19, sup1 (January 2003): 17–26. http://dx.doi.org/10.1080/0892701031000089516.

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Isaev, A. E. "Laboratory Calibration of a Receiver for Measuring the Underwater Noise Levels of a Ship." Measurement Techniques 58, no. 1 (April 2015): 81–89. http://dx.doi.org/10.1007/s11018-015-0667-5.

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Ma, H., and M. P. Tulin. "Experimental Study of Ship Internal Waves—The Supersonic Case." Journal of Offshore Mechanics and Arctic Engineering 115, no. 1 (February 1, 1993): 16–22. http://dx.doi.org/10.1115/1.2920081.

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Internal waves produced by a ship traveling faster than the fastest internal waves (supersonic case) were investigated experimentally in our laboratory in a wide tank using averaging conductivity wave gages developed for this investigation. The wave gage is similar to the conductivity probe, but has space-averaging electrodes. An array of seven such gages was used in a wave tank with dimensions 12 ft length, 8 ft width, 2 ft depth. The water in the tank was stratified with salt to obtain desired density distributions. A spheroid, split vertically, was towed against and along a sidewall to simulate a moving ship. Simultaneous wave profiles at various distances normal to the track of the ship were obtained for different Froude numbers and density distributions. The internal wave patterns were calculated from the measured data and compared with theoretical results. The amplitude on the first crest of the internal wave field is also plotted against the distance from the ship, and a limited comparison with theory is made. The experimental method developed for this study is sensitive, simple and reliable. It may serve to obtain a data base for ship-generated internal waves under a variety of conditions.

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Drogies, Tim, Till Ittermann, Jan Lüdemann, Doris Klinke, Thomas Kohlmann, Norbert Lubenow, Andreas Greinacher, Henry Völzke, and Matthias Nauck. "Potassium – reference intervals for lithium-heparin plasma and serum from a population-based cohort / Kalium – Referenzbereiche für Lithium-Heparin-Plasma und Serum aus einer bevölkerungsbezogenen Studie." LaboratoriumsMedizin 34, no. 1 (February 1, 2010): 39–44. http://dx.doi.org/10.1515/jlm.2010.002.

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AbstractBackground: Serum, as a standard material for the determination of numerous analytes, has disadvantages. The coagulation process leads to an artificial increase of the potassium concentration of approximately 0.3 mmol/L in serum samples compared to plasma. Consequently, plasma reflects the in vivo situation more accurately. The aim of the present analyses was to establish reference intervals (RIs) for potassium using data from a population-based study for serum (PS) and plasma (PP).Methods: Serum was used from 2897 subjects aged 20–79 years, participating in the 5-year follow-up of the Study of Health in Pomerania (SHIP 1), a population-based study in northeast Germany. In addition, 2483 samples (serum and plasma) from a population of blood donors (DONOR-SHIP) were used. Finally, calculated RIs were reevaluated in 202,350 potassium values from hospitalized patients. All measurements were performed on a Siemens Dimension RxL Max HM with ion-selective electrodes. Using the sample pairs from DONOR-SHIP, a regression formula for the transformation of PS to PP was calculated. This formula was applied to the serum data from SHIP 1 to calculate corresponding plasma values. RIs (2.5th and 97.5th percentile) were defined with quantile regression and bootstrap method in SHIP 1.Results: RIs for PS and PP were 3.7–5.1 mmol/L and 3.5–4.6 mmol/L, respectively. Clinically relevant age- or sex-specific tendencies were not detected. The difference between PS and PP is dependent on platelet count and potassium concentration.Conclusions: The study permitted the establishment of RIs for PS and PP on a population-based study. For serum, the influence of platelet count and absolute potassium concentration on the results should be taken into account.

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Kozak, Janusz, and Jakub Kowalski. "Problems Of Determination Of Welding Angular Distortions Of T - Fillet Joints In Ship Hull Structures." Polish Maritime Research 22, no. 2 (April 1, 2015): 79–85. http://dx.doi.org/10.1515/pomr-2015-0020.

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Abstract Ship hull structure elements are usually joined by welding. Welding distortions may cause many problems during manufacturing process. In the literature a wide spectrum of suggestions has been proposed for correct estimation of welding deformation, particularly angular ones, in the fillet welded T-joints. In this work a verification of certain methods selected from the literature is presented basing upon the results of the laboratory measurements. To this end, values determined on the basis of engineering hypotheses have been compared with those obtained from the laboratory tests.

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Rybczak, Monika, Damian Radzimski, and Natalia Wenta. "Watertight Door Control System on A Ship using Profinet IO." International Journal of Innovative Technology and Exploring Engineering 10, no. 11 (September 30, 2021): 84–89. http://dx.doi.org/10.35940/ijitee.k9469.09101121.

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The paper is to deal with the analysis of Profinet IO networks based on the design of a watertight door control system on a passenger ship. The analysis was based on modernization of existing watertight door system installed on a ship. The currency system on ship it use old PLC like S7-200, receive and send date only serial communication. In laboratory on University conditions the same network using two controls company Siemens PLC S7-1214 DC/DC/DC and simulated HMI write on WinCC was recreated and modified with Profinet IO standard. The authors propose a novel watertight door control system using two controllers and a touch panel HMI. The control algorithms have been written in LAD language with use norm SOLAS about list alarm. Program it was write in TIA Portal with use Function blocks (FB) with Block Date (DB) and Function (FC). When designing the laboratory bench, the authors based their assumptions on the actual solutions used on the Balmoral passenger ship. Tests were carried out on parameters related to dimensions, including the length of cables between communication modules of controllers, giving in results the actual lengths of cables in the current system and the one proposed in this work. Then, the possibility of data exchange between the two controllers and the visualization of the simulated KTP 1200 panel was examined. The operation of the software was verified, including its optimization for the correct operation of the entire system. The final part of the paper, after verifying the performance of the system in three steps, an analysis of the current system and the novel solution based on Profinet IO network is given.

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Dymarski, Czesław, and Tomasz Pająk. "Laboratory Test Rig for Examining Aggregate Mining from Seabed Using the Airlift Method." Polish Maritime Research 25, s1 (May 1, 2018): 145–50. http://dx.doi.org/10.2478/pomr-2018-0035.

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Abstract The use of the Airlift method for transporting the mined aggregate from the seabed to the deck of the mining ship is an alternative for presently used solutions, such as suction pumps or scoop transport for instance. Building the laboratory test rig was preceded by tests in natural conditions. The rig was designed in such a way as to model these conditions as close as possible, and to have potential for further development.

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Fourdrinoy, Johan, Julien Dambrine, Madalina Petcu, Morgan Pierre, and Germain Rousseaux. "The dual nature of the dead-water phenomenology: Nansen versus Ekman wave-making drags." Proceedings of the National Academy of Sciences 117, no. 29 (July 8, 2020): 16770–75. http://dx.doi.org/10.1073/pnas.1922584117.

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A ship encounters a higher drag in a stratified fluid compared to a homogeneous one. Grouped under the same “dead-water” vocabulary, two wave-making resistance phenomena have been historically reported. The first, the Nansen wave-making drag, generates a stationary internal wake which produces a kinematic drag with a noticeable hysteresis. The second, the Ekman wave-making drag, is characterized by velocity oscillations caused by a dynamical resistance whose origin is still unclear. The latter has been justified previously by a periodic emission of nonlinear internal waves. Here we show that these speed variations are due to the generation of an internal dispersive undulating depression produced during the initial acceleration of the ship within a linear regime. The dispersive undulating depression front and its subsequent whelps act as a bumpy treadmill on which the ship would move back and forth. We provide an analytical description of the coupled dynamics of the ship and the wave, which demonstrates the unsteady motion of the ship. Thanks to dynamic calculations substantiated by laboratory experiments, we prove that this oscillating regime is only temporary: the ship will escape the transient Ekman regime while maintaining its propulsion force, reaching the asymptotic Nansen limit. In addition, we show that the lateral confinement, often imposed by experimental setups or in harbors and locks, exacerbates oscillations and modifies the asymptotic speed.

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GIBBS, R. A., R. NANYONJO, N. M. PINGAULT, B. G. COMBS, T. MAZZUCCHELLI, P. ARMSTRONG, G. TARLING, and G. K. DOWSE. "An outbreak of Cyclospora infection on a cruise ship." Epidemiology and Infection 141, no. 3 (June 12, 2012): 508–16. http://dx.doi.org/10.1017/s0950268812001197.

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SUMMARYIn 2010, an outbreak of cyclosporiasis affected passengers and crew on two successive voyages of a cruise ship that departed from and returned to Fremantle, Australia. There were 73 laboratory-confirmed and 241 suspected cases of Cyclospora infection reported in passengers and crew from the combined cruises. A case-control study performed in crew members found that illness was associated with eating items of fresh produce served onboard the ship, but the study was unable conclusively to identify the responsible food(s). It is likely that one or more of the fresh produce items taken onboard at a south-east Asian port during the first cruise was contaminated. If fresh produce supplied to cruise ships is sourced from countries or regions where Cyclospora is endemic, robust standards of food production and hygiene should be applied to the supply chain.

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Argote Guzmán, Ronald Yesid. "Implementation of Confirmation of Methods in Measurement Equipment Calibration as a Normalized Strategy to Ensure the Quality of Measurements Made in the Construction, Repair, and Modernization of Ships and Naval Artifacts in COTECMAR." Ciencia y tecnología de buques 8, no. 16 (January 23, 2015): 29. http://dx.doi.org/10.25043/19098642.109.

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The naval, maritime and riverine industry is one of the sectors, which has greater contribution to theworld economy, hence, quality assurance is one of the main priorities in all maritime activities, especiallythe ones related to ship building. The monitoring of different variables that allows good performance of aship involves assessing equipment in order to assure data taking with greater precision and accuracy; thisis where metrology takes place as a science for studying inherent problems to measurement data collection,focusing on equipment calibration. The grade of uncertainty produced by data taking procedures of eachequipment on board of ship depend on techniques and results control specifications, which are knownas Methods Confirmation. The metrology laboratory at COTECMAR applied this method to guaranteequality by estimating validity and reliability of the obtained results through different measuringequipment related to ship construction and repairing.

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Yu, Haicheng, Yi Xia, Jialong Jiao, and Huilong Ren. "Investigation on Ship Hydroelastic Vibrational Responses in Waves." Applied Sciences 8, no. 11 (November 21, 2018): 2327. http://dx.doi.org/10.3390/app8112327.

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The hydroelastic vibrational responses of a large ship sailing in regular and irregular head waves are investigated numerically and experimentally. A 3D time-domain nonlinear hydroelastic mathematical model is established in which the hydrostatic restoring forces and incident wave forces are calculated on the instantaneous wetted hull surface to consider nonlinear effects of the rigid motion and elastic deformation of the hull in harsh waves. Radiation and diffraction wave forces are computed on the mean wetted surface based on the 3D frequency-domain potential flow theory. The slamming loads are calculated by momentum theory and integrated into the hydrodynamic forces. The 1D Timoshenko beam theory is adopted to model the vibrational structural response and is fully coupled with the presented hydrodynamic theory in time-domain to generate the hydroelastic equation of motion. Moreover, self-propelled segmented model tests were conducted in a laboratory wave tank to experimentally investigate the hydroelastic responses of a target ship in regular and irregular head seas. The numerical and experimental results are systemically compared and analyzed, and the established hydroelastic analysis model turns out to be reliable and effective in the prediction of ship hydroelastic responses in waves.

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Jiao, Jialong, Yulin Zhao, Yufei Ai, Chaohe Chen, and Tianhui Fan. "Theoretical and Experimental Study on Nonlinear Hydroelastic Responses and Slamming Loads of Ship Advancing in Regular Waves." Shock and Vibration 2018 (September 5, 2018): 1–26. http://dx.doi.org/10.1155/2018/2613832.

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Wave loads estimation and structural strength evaluation are the fundamental work at the ship design stage. The hydroelastic responses and slamming strength issues are also concerned especially for large-scale high-speed ships sailing in harsh waves. To accurately predict the wave-induced motions and loads acting on the ship sailing in regular waves, a fully coupled 3D time-domain nonlinear hydroelasticity theory is developed in this paper. The vibration modal characteristics of the flexible hull structure derived by the 3D finite element method (FEM) and simplified 1D nonuniform Timoshenko beam theory are firstly described. The hydrostatic restoring force and hydrodynamic wave force are calculated on the real-time wetted surface of hull to address geometric nonlinearity due to the steep wave and large amplitude motions. The bow slamming and green water loads acting on the ship in severe regular waves are estimated by the momentum impact method and dam-breaking method, respectively. Moreover, a small-scaled segmented ship model is designed, constructed, and tested in a laboratory wave basin to validate the hydroelasticity algorithm. The results predicted by theoretical and experimental approaches are systemically compared and analyzed. Finally, future work for predictions of ship hydroelasticity and slamming loads in irregular waves is prospected.

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Sikder, Md Shahidullah, Mohammed Saiful Islam Bhuiyan, Ajay Ghosh, and Farzana Rabin. "Pattern of skin diseases among workers in ship-breaking yards in Bangladesh." Bangladesh Medical Journal 45, no. 3 (July 5, 2017): 147–50. http://dx.doi.org/10.3329/bmj.v45i3.33132.

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Dealing with different toxic chemical and physical agents in ship scrapping activities of ship breaking workers make them vulnerable to suffer from different occupational health hazards including skin diseases. this cross sectional study was carried out in Bangabandhu Sheikh Mujib Medical University, Dhaka and a temporary health center established near the ship-breaking yards of Shitakunda, Chittagong to describe the frequency and pattern of skin diseases among ship-breaking workers in Bangladesh. Five hundred workers of ship breaking yards were included consecutively, history was taken and examined to diagnose skin diseases. Physical examination and laboratory tests (patch test, prick test, woods lamp test, microscopy and histopathology) were done where needed. Most (69.2%) of the workers were from the age group 15 to 62 years and 27.8% were <18 years. Only 27 (5.4%) had some sorts of training and 24.8% do not use any type of protective measure. At least one form of skin disease was found in 47.8% workers. Types of skin diseases were contact dermatitis (19.4%), scabies (15.8%), accidental cut/burn/scald (15.6%), fungal infection (dermatophytosis / pityriasis versicolor/ candidiasis) (10.6%), impetigo / pyoderma (9.8%), seborrheic dermatitis (9.6%), acne 7.2%, palmoplantar keratoderma 4.8%, glossitis/stomatitis/ chelitis 4.4%, lichen simplex chronicus 3.4%, urticaria 2.4% and psoriasis 1.2%. Contact dermatitis, scabies, accidental cut/burn/scald, fungal infections, impetigo/pyoderma, seborrheic dermatitis and acne are the common skin diseases among ship breaking workers. Ensuring adequate protective measures, awareness and training can control these skin diseases among ship-breaking workers.Bangladesh Med J. 2016 Sep; 45 (3): 147-150

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Merlin, François, Christian Bocard, and Gilles Castaing. "OPTIMIZATION OF DISPERSANT APPLICATION, ESPECIALLY BY SHIP." International Oil Spill Conference Proceedings 1989, no. 1 (February 1, 1989): 337–42. http://dx.doi.org/10.7901/2169-3358-1989-1-337.

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ABSTRACT A lot of information has been made available for 10 years on the use of dispersants through offshore and meso-scale trials. A state-of-the-art review shows that among the key factors that have been identified, the contact between dispersant and oil is of utmost importance. A better knowledge of this parameter should be taken into account in defining operational procedures, especially when applying dispersants by ship, which is considered to be complementary to aerial spraying. Upon request of the French Navy, a series of meso-scale trials was carried out off Brittany in June 1987, according to the methodology previously used in 1984. Three dispersants were sprayed from a boat. It was concluded that a high level of energy at the sea surface mitigates discrepancies in dispersants’ efficiencies as measured in laboratory tests. Better results were obtained in the case of relatively thick oil slicks. The low efficiency that was measured when treating downwind was attributed to the already-observed herding effect. These complementary results reinforce the actions that have been recently developed to optimize dispersant application by ship:Shipboard equipment for neat dispersant spraying is described. Its main feature is an original nozzle assembly that allows the dispersant to be applied effectively onto the oil at a flow rate that can be widely and very quickly changed according to the estimated oil thickness.An operational treatment procedure is discussed, showing how to map, mark out, prospect and treat oil slicks according to the slick shape, estimated oil thickness, and wind direction.

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Bonnin-Pascual, Francisco, Emilio Garcia-Fidalgo, Joan P. Company-Corcoles, and Alberto Ortiz. "MUSSOL: A Micro-Uas to Survey Ship Cargo hOLds." Remote Sensing 13, no. 17 (August 28, 2021): 3419. http://dx.doi.org/10.3390/rs13173419.

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Because of their high maneuverability and fast deployment times, aerial robots have recently gained popularity for automating inspection tasks. In this paper, we address the visual inspection of vessel cargo holds, aiming at safer, cost-efficient and more intensive visual inspections of ships by means of a multirotor-type platform. To this end, the vehicle is equipped with a sensor suite able to supply the surveyor with imagery from relevant areas, while the control software is supporting the operator during flight with enhanced functionalities and reliable autonomy. All this has been accomplished in the context of the supervised autonomy (SA) paradigm, by means of extensive use of behaviour-based high-level control (including obstacle detection and collision prevention), all specifically devised for visual inspection. The full system has been evaluated both in laboratory and in real environments, on-board two different vessels. Results show the vehicle effective for the referred application, in particular due to the inspection-oriented capabilities it has been fitted with.

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Boroday, I., S. Zhivitsa, and V. Platonov. "Ship seakeeping and the ways of studying it (to the 50th anniversary of Seakeeping Laboratory)." Transactions of the Krylov State Research Centre 2, no. 384 (2018): 147–52. http://dx.doi.org/10.24937/2542-2324-2018-2-384-147-152.

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Varma, R. A. Raveendra. "Design of Degaussing System and Demonstration of Signature Reduction on Ship Model through Laboratory Experiments." Physics Procedia 54 (2014): 174–79. http://dx.doi.org/10.1016/j.phpro.2014.10.056.

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Briggs, Michael J., Paul J. Kopp, Vladimir K. Ankudinov, and Andrew L. Silver. "Comparison of Measured Ship Squat with Numerical and Empirical Methods." Journal of Ship Research 57, no. 02 (June 1, 2013): 73–85. http://dx.doi.org/10.5957/jsr.2013.57.2.73.

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The Beck, Newman and Tuck (BNT) numerical predictions are used in the Coastal and Hydraulics Laboratory (CHL) Channel Analysis and Design Evaluation Tool (CADET) model for predicting underkeel clearance (UKC) resulting from ship motions and squat. The Ankudinov empirical squat prediction formula has been used in the CHL ship simulator and was recently updated. The World Association for Waterborne Transport Infrastructure (formerly The Permanent International Association of Navigation Congresses, PIANC) has recommended several empirical and physics-based formulas for the prediction of ship squat. Some of the most widely used formulas include those of Barrass, Eryuzlu, Huuska, ICORELS, Romisch, Tuck, and Yoshimura. The purpose of this article is to compare BNT, Ankudinov, and PIANC predictions with measured DGPS squat data from the Panama Canal for four ships. These comparisons demonstrate that the BNT, Ankudinov, and PIANC predictions fall within the range of squat measurements and can be used with confidence in deep draft channel design.

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Bykova, Valentina Prokhorovna. "Electrotechnical complex for distance learning." Vestnik of Astrakhan State Technical University. Series: Marine engineering and technologies 2021, no. 2 (May 31, 2021): 109–19. http://dx.doi.org/10.24143/2073-1574-2021-2-109-119.

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The article identifies the difficulties arising from distant training of electro-engineering disciplines, in particular, when conducting laboratory work on the course of physics, electrical engineering and electronics. The advantages and prospects of technical means in education have been analyzed. The achievements of high-quality distance learning based on a computer laboratory of the educational and methodological electrical installation complex have been listed. Functioning of a computer laboratory supposes a connection between the server and the computers of the students and the teacher. One of the ways to implement distance learning using computer technologies when performing laboratory work on electrical disciplines has been presented. There has been considered an algorithm for solving graphical and computational tasks by using experimental data obtained when working with the test bench “Electrical Energy and Electronics”. There have been illustrated the diagrams of an AC rectifier diode, a parametric stabilizer of the electrical circuit voltage on the laboratory bench; the graphs of the current-voltage characteristics of an ideal semiconductor and real diodes, a Schottky diode, a silicon diode at different temperatures, a Zener diode. A diagram of the dependence of semiconductor band gap on temperature is presented. It has been inferred that the students must be IT competent before studying special subjects, in particular, physics and mathematics (specialist’s course “Ship Power plants and Automatic Equipment Operation”; Bachelor’s courses “Shipbuilding”, “Ship Power Plants”), as one of the areas of their professional activities is design and modernization of ships and marine equipment and automation, as well as the analysis of operational characteristics of power plants, which is impossible without special software and technologies. The proposed methods of conducting the laboratory work will prepare the trainees for solving the professional problems.

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Korczewski, Zbigniew. "A Method to Assess Transverse Vibration Energy of Ship Propeller Shaft for Diagnostic Purposes." Polish Maritime Research 24, no. 4 (December 20, 2017): 102–7. http://dx.doi.org/10.1515/pomr-2017-0141.

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Abstract The article discusses a key problem of ship propulsion system vibration diagnostics, which concerns assessing this part of mechanical energy transmitted from the main engine to the ship propeller which is dissipated due to propeller shaft vibration. A simplified calculation model is proposed which allows the total energy of the generated torsional vibration to be assessed from the shaft deflection amplitude measured at the mind-span point between the supports. To verify the developed model, pilot tests were performed on the laboratory rotational mechanical system test rig. In those tests, cyclic bending moment was applied to a unified (cylindrical) material sample, which modelled, at an appropriate scale, structural and functional properties of a real propeller shaft.

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Lin, Ray-Qing, and Tim Smith. "Numerical Modeling of a Planing Hull Maneuvering in a Regular Wave, Part 1: Dynamic Instability." Journal of Ship Production and Design 29, no. 02 (May 1, 2013): 76–83. http://dx.doi.org/10.5957/jspd.2013.29.2.76.

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The surf rescue boat (SRB) of the U.S. Coast Guard is a class of high-speed planing boats. This 9-meter craft is capable of operating at speeds up to Froude number 1.7. However, when it begins to maneuver in incident waves near its maximum speed, dynamic instability occurs immediately. In this instance, the craft trims and rolls to a large heel angle with "plow-In," even with small-amplitude incident waves and small course changes. In this study, a fully nonlinear ship motion model named the Digital Self-consistent Ship Experimental Laboratory (DiSSEL) is used as a numerical tool to understand the physics that cause the dynamic instabilities. DiSSEL showed that when SRB reached Froude number 1.698, acceleration resulting from heading change would cause a dynamic force and moment imbalance, resulting in heel and pitch motion instabilities. DiSSEL also showed that if the heading is fixed, and other conditions remain the same, the instability did not occur. Unfortunately, there is no detailed record of the data or numerical simulation of the ship motions in the stable and unstable regions, except for the description of the ship motions by Codega and Lewis (1987). The simulations by DiSSEL agree well with this description.

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McGrath, Triona, Margot Cronin, Elizabeth Kerrigan, Douglas Wallace, Clynton Gregory, Claire Normandeau, and Evin McGovern. "A rare intercomparison of nutrient analysis at sea: lessons learned and recommendations to enhance comparability of open-ocean nutrient data." Earth System Science Data 11, no. 1 (March 11, 2019): 355–74. http://dx.doi.org/10.5194/essd-11-355-2019.

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Abstract. An intercomparison study has been carried out on the analysis of inorganic nutrients at sea following the operation of two nutrient analysers simultaneously on the GO-SHIP A02 trans-Atlantic survey in May 2017. Both instruments were Skalar San++ Continuous Flow Analyzers, one from the Marine Institute, Ireland and the other from Dalhousie University, Canada, each operated by their own laboratory analysts following GO-SHIP guidelines while adopting their existing laboratory methods. There was high comparability between the two data sets and vertical profiles of nutrients also compared well with those collected in 1997 along the same A02 transect by the World Ocean Circulation Experiment. The largest differences between data sets were observed in the low-nutrient surface waters and results highlight the value of using three reference materials (low, middle and high concentration) to cover the full range of expected nutrients and identify bias and non-linearity in the calibrations. The intercomparison also raised some interesting questions on the comparison of nutrients analysed by different systems and a number of recommendations have been suggested that we feel will enhance the existing GO-SHIP guidelines to improve the comparability of global nutrient data sets. A key recommendation is for the specification of clearly defined data quality objectives for oceanic nutrient measurements and a flagging method for reported data that do not meet these criteria. The A02 nutrient data set is currently available at the National Oceanographic Data Centre of Ireland: https://doi.org/10.20393/CE49BC4C-91CC-41B9-A07F-D4E36B18B26F and https://doi.org/10.20393/EAD02A1F-AAB3-4F4E-AD60-6289B9585531.

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Feng, Xing, and Wanqing Wu. "Generation of Water Waves Using Momentum Source Wave-Maker Applied to a RANS Solver." Mathematical Problems in Engineering 2019 (May 5, 2019): 1–11. http://dx.doi.org/10.1155/2019/1308960.

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Nowadays, as the development of Computational Fluid Dynamics (CFD) and the numerical wave tank (NWT) has advanced, numerical analysis has become increasingly useful and powerful for the ship designing and ship hydrodynamics. In this study, a momentum source wave-maker and an analytical relaxation wave absorber were embedded into 2D RANS equation model with RSM turbulence closure scheme to establish the NWT for ship designing and hydrodynamics. The VOF (volume-of-fluid) method was applied to accurately capture the water free surface. The body force-weighted scheme is chosen for pressure interpolation and the second order upwind scheme for discretization of the momentum equation. In order to calculate convection and diffusion fluxes through the control volume faces, PISO algorithm is adopted for pressure-velocity coupling. The momentum source function for wave generation and the analytical relaxation function for wave absorption were deduced for constructing the NWT (numerical wave tank). The proposed NWT was then validated by the laboratory measurements of Umeyama and the analytical solution, indicating that the constructed NWT is effective and accurate.

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Journal articles on the topic 'La Coryphène (Laboratory ship)'

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