Academic literature on the topic 'Ship breaking'

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Journal articles on the topic "Ship breaking"

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Sunaryo, Sunaryo, Eko Djatmiko, Siti Fariya, Rafet Kurt, and Sefer Gunbeyaz. "A Gap Analysis of Ship-Recycling Practices in Indonesia." Recycling 6, no. 3 (July 13, 2021): 48. http://dx.doi.org/10.3390/recycling6030048.

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Ship recycling is gaining attention in Indonesia due to the increase in end-of-life ships and uneconomical nationally flagged ships, and is considered a prospective source of economic development and employment opportunity, and yet conceivably poses a threat to the health and safety of workers and the environment. There are international and national regulations that govern ship-recycling activities to ensure that the hazardous impacts of the industry are minimized. We investigated the disparity between current ship-breaking practices in Indonesia and the requirements of related international and national regulations, with the findings intended for use as a stepping stone to proposing a strategy to establish a green and sustainable ship-recycling industry. A benchmark study of the world’s leading ship-recycling countries was conducted, and a gap analysis was performed by comparing existing international and national regulations with current ship-breaking practices in Indonesia. We identified two types of ship-breaking practices in Indonesia: Conventional environmentally unfriendly ship-breaking method, conducted by most Indonesian ship-breaking yards, and a rather modern, more environmentally friendly method, conducted by ship-repair yards. However, neither of the practices met the requirements of the regulations, and improvements are therefore needed to make the ship-recycling industry more green and sustainable, and to gain international recognition.
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Guo, Jian, Zhijun Chen, and Haiqi Tang. "Simulation Analysis on Cable Breaking of Large Ships in a Port." Advances in Engineering Technology Research 1, no. 2 (September 24, 2022): 207. http://dx.doi.org/10.56028/aetr.1.2.207.

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Simulation analysis on drifting of an oil tanker of 300,000 tons deadweight (DWT) after cable breaking was done with a large ship maneuver simulator. Risks such as being stranded and colliding into other docks or ships are illustrated when cable breaking accident happens to a large ship under different wind and current directions. Specific emergency countermeasures are proposed to ensure safety operation.
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Guo, Jian, Zhijun Chen, and Haiqi Tang. "Simulation Analysis on Cable Breaking of Large Ships in a Port." Advances in Engineering Technology Research 2, no. 1 (September 24, 2022): 207. http://dx.doi.org/10.56028/aetr.2.1.207.

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Simulation analysis on drifting of an oil tanker of 300,000 tons deadweight (DWT) after cable breaking was done with a large ship maneuver simulator. Risks such as being stranded and colliding into other docks or ships are illustrated when cable breaking accident happens to a large ship under different wind and current directions. Specific emergency countermeasures are proposed to ensure safety operation.
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Watagawa, M., T. Shinoda, and K. Hasegawa. "ESTIMATING THE AMOUNT OF SHIP RECYCLING ACTIVITY USING REMOTE SENSING APPLICATION." ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences XLI-B8 (June 24, 2016): 1195–200. http://dx.doi.org/10.5194/isprs-archives-xli-b8-1195-2016.

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The Advanced Land Observing Satellite (ALOS) was launched for earth observation and there are more than 6 million scenes of archives including coastal areas during period of five years. The wealth of satellite imagery is noticeable for investigating monitoring methods such as ship detection in wide ocean area. Especially, it is useful way to estimate past behaviour from satellite imagery compared to reference data. We collected satellite imagery and analysis breaking process in major ship breaking yards between year 2009 and 2011. Comparing the number of recycling ships by satellite imagery to the world statistics is in good agreement. In this study, Remote Sensing Application has been discussed in order to assess the potential to be used for economic activities such as ship recycling in wide coastal area. It was used to evaluate the performance of ship recycling monitoring by Satellite imagery. Additionally, an approach for recognizing ships by SAR imagery regardless of weather conditions is presented.
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Watagawa, M., T. Shinoda, and K. Hasegawa. "ESTIMATING THE AMOUNT OF SHIP RECYCLING ACTIVITY USING REMOTE SENSING APPLICATION." ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences XLI-B8 (June 24, 2016): 1195–200. http://dx.doi.org/10.5194/isprsarchives-xli-b8-1195-2016.

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The Advanced Land Observing Satellite (ALOS) was launched for earth observation and there are more than 6 million scenes of archives including coastal areas during period of five years. The wealth of satellite imagery is noticeable for investigating monitoring methods such as ship detection in wide ocean area. Especially, it is useful way to estimate past behaviour from satellite imagery compared to reference data. We collected satellite imagery and analysis breaking process in major ship breaking yards between year 2009 and 2011. Comparing the number of recycling ships by satellite imagery to the world statistics is in good agreement. In this study, Remote Sensing Application has been discussed in order to assess the potential to be used for economic activities such as ship recycling in wide coastal area. It was used to evaluate the performance of ship recycling monitoring by Satellite imagery. Additionally, an approach for recognizing ships by SAR imagery regardless of weather conditions is presented.
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Thomas, Manoj T. "The Alang Ship-breaking Yard." Asian Case Research Journal 11, no. 02 (December 2007): 327–46. http://dx.doi.org/10.1142/s0218927507000965.

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The case deals with the issue of environmental dumping in the poorer nations by more advanced nations. The trigger for the case is the sending back of the French naval ship Clemenceau from Indian coasts on the grounds that it contained prohibited environmentally hazardous materials like asbestos. The issue raised intense debates both in the public domain and the legal courts. Environmentalists, who brought the news in the public domain, sought legal intervention and argued in the public media. While the ship was sent back to France following the decision by France's highest administrative court, it raised questions about the entire ship breaking business. Alang, where the ship was initially supposed to be broken down, had seen an increase in business owing to the relatively cheap labour and less stringent environmental legislations compared to the established ship breaking centres in Europe and China. As poorer countries with even less regulated ship breaking centres, such as Bangladesh and Pakistan entered the fray, Alang had seen a decline in business. Ship breaking in Alang contributes to employment and the sending away of Clemenceau was seen by many supporters of ship breaking at Alang as lost opportunity for reviving the stagnating business at Alang. Others, however, saw it as an opportunity for Alang to improve environmental compliance and to introduce new technologies in ship breaking so that it can be sustainable in the long run. The case presents these different perspectives and tries to demonstrate the decision dilemma faced by a policy maker or regulator.
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Ali, Md Ashim, Kazuo Suzuki, and Sou Miyauchi. "Study on bow wave breaking around ultra large block coefficient ship." Journal of Naval Architecture and Marine Engineering 10, no. 2 (December 24, 2013): 69–80. http://dx.doi.org/10.3329/jname.v10i2.16104.

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Due to the increase of maritime transportation volume day by day it is necessary to design a ship hull having large carrying capacity with low resistance. In case of slow moving ships, usually wave breaking occurs in front of bow. A considerable portion of resistance occurs due to the energy dissipation of such wave breaking in case of Ultra Large Block coefficient Ship (ULBS) suggested by the authors. The key objective of this research work is to investigate the relationship between bow wave breaking and free surface disturbance function that may be used as a parameter for numerical prediction of bow wave breaking. In this regard, the experiments and numerical calculations have been carried out for six models of ULBS. From the results, it can be concluded that the wave breaking area in front of bow increases with the increase of surface integral of the square of free surface disturbance function, Froude number and block coefficient.DOI: http://dx.doi.org/10.3329/jname.v10i2.16104
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Karim, Md Saiful. "Violation of Labour Rights in the Ship-Breaking Yards of Bangladesh: Legal Norms and Reality." International Journal of Comparative Labour Law and Industrial Relations 25, Issue 4 (December 1, 2009): 379–94. http://dx.doi.org/10.54648/ijcl2009025.

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Ship-breaking started as an industry in Bangladesh in the early 1970s. This industry is not technically organized, and the management is also primitive and unsound. Although specific information is not available, it is estimated that about 700 workers have been killed and, at the same time, a total of 10,000 workers have been injured in explosions at the ship-breaking yards over the last three decades. This process continues unabated in the absence of specific legislation for regulating ship-breaking industries in Bangladesh. Against this backdrop, this paper identifies the major issues relating to enforcement of labour rights in the ship-breaking yards of Bangladesh.
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Nascimento, Maria Francisca, Claudio Freitas Neves, and Geraldo De Freitas Maciel. "WAVES GENERATED BY TWO OR MORE SHIPS IN A CHANNEL." Coastal Engineering Proceedings 1, no. 32 (February 2, 2011): 60. http://dx.doi.org/10.9753/icce.v32.waves.60.

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The numerical model FUNWAVE+Ship simulates the generation and propagation of ship waves to shore, including phenomena such as refraction, diffraction, currents and breaking of waves. The interaction of two wave trains, generated by ships moving either in the same direction at different speeds or in opposite directions, is studied. Focus is given to the wave orbital velocities and to the free surface pattern.
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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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Dissertations / Theses on the topic "Ship breaking"

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Zhang, Heng, and 張恒. "Breaking the boundary: towards a spatial integration of new urban expansion and old city in Dapeng, Shenzhen." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2008. http://hub.hku.hk/bib/B41668935.

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Yang, Chi-Yuan, and 楊棋元. "The Relationship Among Breaking, Peer Relation-ship, Academic Achievement, and Self-concept of Adolescent-The Case of Taichung." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/10911817437009248709.

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碩士
大葉大學
休閒事業管理學系碩士班
102
This study focuses on the relationship among the adolescent participation of breakdancing, peer relationship, academic achievement and self-concept. The research was mainly conducted with questionnaire. Of the 280 copies of questionnaire sent out, 271 copies were counted valid among those returned. The SPSS for Windows 12.0 then was used for data analysis. The results showed that there are likely to have significant difference on youth participation of street dancing and peer relationship (and both of their sub-aspect) for adolescent dancers who dance less than 2 years and more than 3 years. Among them, however, the Breakdancing, peer relationship, and academic achievement are significant positively related with self-concept. Participation of Breakdancing, peer relationship, and academic achievement can effectively predict the self-concept of youth. According to the conclusions, we would like to suggest that school teachers and parents pay more attention on the process of adolescents’ participation of Breaking, the interactions between their peer relationship, and their performance at school, with an eye on helping them developing their self-concept.
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Kulkarni, Saurabh Shirish. "Fault location and characterization in AC and DC power systems." 2012. http://hdl.handle.net/2152/22121.

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The focus of this research is on identification, location, interruption, characterization and overall management of faults in conventional AC distribution systems as well as isolated MVDC power systems. The primary focus in AC distributions systems is on identifying and locating underground cable faults using voltage and current waveforms as the input data. Cable failure process is gradual and is characterized by a series of single-phase sub-cycle incipient faults with high arc voltage. They often go undetected and eventually result in a permanent fault in the same phase. In order to locate such incipient cable faults, a robust yet practical algorithm is developed taking into account the fault arc voltage. The algorithm is implemented in the time-domain and utilizes power quality monitor data to estimate the distance to the fault in terms of the line impedance. It can be applied to locate both sub-cycle as well as permanent faults. The proposed algorithm is evaluated and proved out using field data collected from utility distribution circuits. Furthermore, this algorithm is extended to locate evolving faults on overhead distribution lines. Evolving faults are faults beginning in one phase of a distribution circuit and spreading to another phase after a few cycles. The algorithm is divided into two parts, namely, the single line-to-ground portion of the fault and the line-to-line-to-ground portion of the fault. For the single line-to-ground portion of the fault, the distance to the fault is estimated in terms of the loop or self-reactance between the monitor and the fault. On the other hand, for the line-to-line-to-ground and line-to-line portion of the fault the distance is estimated in terms of the positive-sequence reactance. The secondary focus of fault management in AC distribution systems is on identifying fault cause employing voltage and current waveform data as well as meteorological information. As the first step, unique characteristics of cable faults are examined along with methods to identify such faults with suitable accuracy. These characteristics are also used to distinguish underground cable faults from other overhead distribution line faults. The overhead line faults include tree contact, animal contact and lightning induced faults. Waveform signature analysis, wavelet transforms and arc voltages during the fault event are used for fault cause identification and classification. A statistical based classification methodology to identify fault cause is developed by utilizing promising characteristics. Unlike the AC system infrastructure which is already in place, the DC system considered in this document is that of a notional electric ship. The nature of DC current, with the absence of a current zero as well as the presence of power electronic devices influencing the current behavior, makes interrupting DC fault currents challenging. As a part of this research an innovative DC fault interruption scheme is proposed for rectifier- fed MVDC systems. A fault at the terminals of a phase-controlled rectifier results in a high magnitude current impulse caused by the filter capacitor discharging into the fault resistance. It is proposed to use a series inductor to limit the magnitude of this current impulse. The addition of the inductor results in an underdamped series RLC circuit at the output terminals of the rectifier which causes the fault current to oscillate about zero. Furthermore, it is proposed to utilize a conventional AC circuit breaker to interrupt this fault current by exploiting the zero crossings resulting from the oscillations. Using the proposed scheme for the example case, the peak fault current magnitude as well as the interruption time is significantly reduced.
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Books on the topic "Ship breaking"

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Great Lakes Lighthouse Keepers Association., ed. Icebreaker Mackinaw: WAGB 83, 1944-2006. Mackinaw City, MI: Great Lakes Lighthouse Keepers Association, 2006.

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Ionov, B. P. Ledovoe soprotivlenie i ego sostavli͡a︡i͡u︡shchie. Leningrad: Gidrometeoizdat, 1988.

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Gray, Doug. R.M.S. Nascopie: Ship of the North. Ottawa, Canada: Golden Dog Press, 1997.

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Ship-breaking industry: Risk-vulnerability, health hazards and livelihood of workers in Bangladesh. Dhaka: Academic Press and Publishers Library, 2014.

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Hossain, Maruf Md M. Ship breaking activities: Threat to coastal environment, biodiversity and fishermen community in Chittagong, Bangladesh. Chittagong: Young Power in Social Action (YPSA), 2010.

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Pandya, C. G. Employment, working, and living conditions of workers at Alang ship breaking yard: A study. Ahmedabad: Gandhi Labour Institute, 1990.

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Mahmudul, Islam Mohammad, and Young Power in Social Action (Bangladesh). Advocacy & Publication Unit, eds. Ship breaking activities and its impact on the coastal zone of Chittagong, Bangladesh: Towards sustainable management. Chittagong: Published by Advocacy & Publication Unit, Young Power in Social Action (YPSA), 2006.

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Canada. Department of Indian Affairs and Northern Development. Reactions of beluga whales and narwhals to ship traffic and ice-breaking along ice edges in the eastern Canadian High Arctic, 1982-1984. Ottawa: Department of Indian Affairs and Northern Development, 1986.

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Fischerström, Staffan. Isbrytare: Med statens isbrytare under 80 år. Falkenberg: C.B. Marinlitteratur, 1997.

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Office, General Accounting. Coast Guard: Additional actions needed to improve cruise ship safety : report to Congressional requesters. Washington, D.C: The Office, 1993.

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Book chapters on the topic "Ship breaking"

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Siddiquee, Noman Ahmad, Selina Parween, M. M. A. Quddus, and Prabal Barua. "Heavy Metal Pollution in Sediments at Ship Breaking Area of Bangladesh." In Coastal Environments: Focus on Asian Regions, 78–87. Dordrecht: Springer Netherlands, 2012. http://dx.doi.org/10.1007/978-90-481-3002-3_6.

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Demaria, Federico. "Can the Poor Resist Capital? Conflicts over ‘Accumulation by Contamination’ at the Ship Breaking Yard of Alang (India)." In Nature, Economy and Society, 273–304. New Delhi: Springer India, 2015. http://dx.doi.org/10.1007/978-81-322-2404-4_14.

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Cai, Shaowei, Bohan Li, and Xindi Zhang. "Local Search for SMT on Linear Integer Arithmetic." In Computer Aided Verification, 227–48. Cham: Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-031-13188-2_12.

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AbstractSatisfiability Modulo Linear Integer Arithmetic, SMT (LIA) for short, has significant applications in many domains. In this paper, we develop the first local search algorithm for SMT (LIA) by directly operating on variables, breaking through the traditional framework. We propose a local search framework by considering the distinctions between Boolean and integer variables. Moreover, we design a novel operator and scoring functions tailored for LIA, and propose a two-level operation selection heuristic. Putting these together, we develop a local search SMT (LIA) solver called LS-LIA. Experiments are carried out to evaluate LS-LIA on benchmarks from SMTLIB and two benchmark sets generated from job shop scheduling and data race detection. The results show that LS-LIA is competitive and complementary with state-of-the-art SMT solvers, and performs particularly well on those formulae with only integer variables. A simple sequential portfolio with Z3 improves the state-of-the-art on satisfiable benchmark sets of LIA and IDL benchmarks from SMT-LIB. LS-LIA also solves Job Shop Scheduling benchmarks substantially faster than traditional complete SMT solvers.
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Itoh, K., H. Mimura, T. Inoue, R. Todoroki, Y. Horii, and H. Kihira. "Local Corrosion of Welds of 60kgf/mm2 Class Steels for Ice-breaking Ships." In Advanced Materials for Severe Service Applications, 389–405. Dordrecht: Springer Netherlands, 1987. http://dx.doi.org/10.1007/978-94-009-3445-0_25.

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"A FOURTH WINTER, BREAKING OUT." In Ice Ship, 197–204. University Press of New England, 2014. http://dx.doi.org/10.2307/j.ctv1xx99wt.25.

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Ross, Charles D. "The Lions of the Royal Victoria." In Breaking the Blockade, 79–93. University Press of Mississippi, 2020. http://dx.doi.org/10.14325/mississippi/9781496831347.003.0007.

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This chapter outlines the offer of John Fraser and Company to James Bulloch and John Low — a passage to Liverpool on their ship Annie Childs. The chapter narrates how Union authorities realized that Low was involved with the Fingal shipment of cotton. Bulloch and Low left Wilmington and arrived in Liverpool to find Oreto ready to go. The ship was given the working name Oreto (for an Italian river valley) in the Liverpool shipyard to divert attention from its ultimate destination. The chapter then introduces US Consul Thomas Dudley who let both the British and his own government know that a “formidable and dangerous” ship was being built and was headed for the Confederacy. The chapter turns to describe Lewis Heyliger's return from Bermuda to work on building a defense for Oreto. Finally, the chapter describes the two lions of the Royal Victoria: captains Raphael Semmes and John Maffitt. It reviews Maffitt's contributions and significance in taking command of Oreto, and how Semmes' presence in Nassau took attention away from Maffitt.
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Ross, Charles D. "“Blockade-running from this port has ceased”." In Breaking the Blockade, 169–82. University Press of Mississippi, 2020. http://dx.doi.org/10.14325/mississippi/9781496831347.003.0013.

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This chapter highlights the ships that entered Nassau from Wilmington or Charleston in the fall of 1864. It argues that there was still money to be made running the blockade given a fast-enough ship. While blockade running, even to Nassau, continued for a bit longer, the Great Carnival was coming to a close. For the first time in years the shipping news in the local newspapers contained no departures to Wilmington or Charleston. The chapter then examines the number of passengers on Corsica that swelled far beyond that in the same months in other years, as the tourists ending their vacation a bit early were joined by British mariners. The chapter also looks at the appearance of John Maffitt who came back into the blockade-running game in 1864. It discusses how Maffitt managed to take command of the new government-owned steamer Owl. Ultimately, the chapter explicates the symbolic end of the Great Carnival and Nassau as a blockade-running hub.
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Cotton, B., S. R. Bishop, and J. M. T. Thompson. "Sensitivity of capsize to a symmetry breaking bias." In Contemporary Ideas on Ship Stability, 89–100. Elsevier, 2000. http://dx.doi.org/10.1016/b978-008043652-4/50008-0.

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Chowdhury, Silvia. "Bangladesh's Ship breaking Industry: A Stakeholder Analysis." In Developments in Corporate Governance and Responsibility, 173–84. Emerald Publishing Limited, 2020. http://dx.doi.org/10.1108/s2043-052320200000015010.

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Ross, Charles D. "“This Remote Western Maritime Colony”." In Breaking the Blockade, 35–43. University Press of Mississippi, 2020. http://dx.doi.org/10.14325/mississippi/9781496831347.003.0004.

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This chapter describes the steamship service of the two cities after the British mail steamer Karnak made its way from New York to Nassau for the first time. It argues that the establishment of such a regular link with the outside world had been a high priority for the British officials and the contract meant that Bahamians would finally have a regular connection to both North America and Europe. When Prince Alfred paid his visit to New Providence in December 1861, Acting Governor Charles Rogers Nesbitt wrote an official welcome in which he referred to the Bahamas as “this remote western maritime colony.” The chapter offers a glance at the Bahamas' place in world history, and investigates how Bahamians were displayed as opportunistic people of the sea who embraced everything associated with a maritime lifestyle. But unless there were goods on a wrecked ship to pilfer, there was not much to do.
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Conference papers on the topic "Ship breaking"

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Sun, Jaeouk, Sunguk Kim, Youngdal Choi, and Reko-Antti Suojanen. "A Study on Hull Form Design for Ice Breaking Arctic LNG Carrier." In International conference on Ship & Offshore Technology Ice Class Ships 09. RINA, 2009. http://dx.doi.org/10.3940/rina.icsot.2009.09.

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Berg, Tor E., and Joachim Bakke. "Ship-to-Ship LNG Transfer in Arctic Waters." In ASME 2008 27th International Conference on Offshore Mechanics and Arctic Engineering. ASMEDC, 2008. http://dx.doi.org/10.1115/omae2008-57319.

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Ship transport of LNG from shore-based LNG plants on the Yamal Peninsula will pass through waters with seasonal ice. A transport chain using specially designed ice-breaking LNG shuttle tankers is proposed. The shuttles will bring the cargo beyond the ice edge, where it will be transloaded to seagoing winterized LNG carriers. This paper looks at risks related to the operational phases of a side-by-side lightering operation. Climatic changes question the applicability of historic metocean data for locations identified as possible areas for open-sea ship-to-ship transfer of LNG in the eastern Barents Sea.
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Sazidy, Mahmud, Claude Daley, and Bruce Colbourne. "A Mathematical Model of Icebreaking for Safe Speed Assessment." In SNAME 11th International Conference and Exhibition on Performance of Ships and Structures in Ice. SNAME, 2014. http://dx.doi.org/10.5957/icetech-2014-172.

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This paper presents numerical and mathematical models of ship-ice breaking. Two ship-ice breaking scenarios are considered, ice wedge breaking and level ice breaking. Numerical models of both breaking scenarios account for ice crushing, ice flexure and water foundation effect. For ice wedges, the effect of ship speed on the ice breaking process is investigated for different ship angles, ice wedge angles and ice thicknesses. The level ice breaking is investigated with and without radial cracks. The mathematical model is developed based on validated numerical results. Both models can be useful for safe speed evaluation, ice management and ship design.
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Sasa, Kenji, and Atilla Incecik. "New Evaluation on Ship Strength From the Viewpoint of Stranded Casualties in Coastal Areas Under Rough Weather." In ASME 2009 28th International Conference on Ocean, Offshore and Arctic Engineering. ASMEDC, 2009. http://dx.doi.org/10.1115/omae2009-79048.

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It is important to study the safety of “the refugee of harbour” from the viewpoint of port planning. Recently, accidents of stranded vessels which resulted in breaking of the ship hull become very serious in the port operation and the coastal environment. However, these problems have not even been discussed among the coastal engineering and shipbuilding communities. In this study, we summarize the importance of this point by showing the statistic of casualties. Then, the strength of ship hulls is calculated using the strip theory and the basic dynamics of material, when ships are designed to navigate in the ocean. Since the results of calculations cannot explain the reasons for the incidents which resulted in breaking of the ship hull, the possibility of the high stress levels due to cracks is also considered to explain the reasons for these casulties. The results of the predictions can explain that the breaking of the stranded ship hulls may be caused by the high stresses due to cracks on the ship hull. Therefore, in the future the safety of coastal areas outside harbours should be considered by predicting the motions of anchored ships and the fracture mechanics of the ship hull in detail.
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Sazidy, Mahmud, Claude Daley, Bruce Colbourne, and Jungyong Wang. "Effect of Ship Speed on Level Ice Edge Breaking." In ASME 2014 33rd International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/omae2014-24101.

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This paper presents a numerical model of ship ice-wedge interaction to study the effect of ship speed on level ice edge breaking. The interaction process is modeled using LS-DYNA. The developed model considers ice crushing, ice flexural failure and the water foundation effect. For the ice, two different plasticity-based material models are used to represent ice crushing and ice flexural behaviors. The water foundation effect is modeled using a simple linear elastic material. The analysis is performed for a ship speed range of 0.1 to 5 ms−1 and ice thickness of 0.5 to 1.5 m. The analysis indicates that both ship speed and ice thickness significantly affect the ice breaking process. The model results are in good agreement with a number of analytical and empirical models. The model can be useful in establishing a rational basis for safe speed criteria, improving ship structural standards and tools for ice management capability assessment.
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Huang, Luofeng, Fang Li, and Minghao Li. "Simulation of a Ship Advancing in Pre-Sawn Ice." In ASME 2022 41st International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2022. http://dx.doi.org/10.1115/omae2022-80106.

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Abstract Pre-sawn ice test is the standard testing method to negate ice-breaking resistance from the whole resistance of a ship breaking level ice, which is of great importance for understanding ship-ice interactions and predicting various sea-ice loads on ships. This work has developed a computational model that can realistically simulate a ship advancing in a pre-sawn ice channel. The model applies Computational Fluid Dynamics to solve ship hydrodynamics, which is coupled with a novel particle-bonded Discrete Element Method to model pre-sawn ice pieces. Experiments were also conducted to validate the simulations. Upon validation, analyses were performed to investigate the ship-ice interaction. It was demonstrated that the pre-sawn ice resistance’s speed dependence has three regimes: for low ship speeds, the ice resistance slightly increases with decreased speed due to ice piling up; for middle ship speeds, the ship-ice interaction could remain similar and there is no distinctive change in the ice resistance; for high ship speeds, ice resistance evidently increases with increasing ship speed, which results from strong ship-ice collisions that cause ice pieces to move dramatically.
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7

Li, Hui, Yan Feng, Zheng Yang, Weijia Sheng, and Yuan Qian. "Study on Influence of Bow Configuration on Dynamic Response of Ship Collision With Ice." In ASME 2018 37th International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2018. http://dx.doi.org/10.1115/omae2018-78200.

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The ice breaking capacity of the icebreaker depends on the geometric characteristics of the bow. Selecting reasonable bow configuration and characteristic parameters is helpful to improve the ice breaking capacity. In the ship parameters, the bow rake angle directly influences the ice breaking ability and the dipping efficiency. The ship collision with ice is simulated by using nonlinear dynamic analysis software LS-DYNA. By changing the bow rake angle, the collision force curves are obtained, and the ice breaking ability and efficiency of the polar ship with three bow configurations are calculated and compared with the ice resistance calculated by Riska formula. Through the analysis of the average longitudinal collision force and the ice breaking distance, the optimum bow configuration is selected. Combined with the calculation of the open water resistance, the scheme with the bow rake angle of 13 degrees is the best in the resistance performance.
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8

Ren, Zhen, Jianhua Wang, and Decheng Wan. "Numerical Simulations of Ship Bow and Shoulder Wave Breaking in Different Advancing Speeds." In ASME 2018 37th International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2018. http://dx.doi.org/10.1115/omae2018-78375.

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The KCS model is employed for the numerical simulations to investigate the wave breaking phenomena of the bow and shoulder wave. RANS approach coupled with high resolution VOF technique is used to resolve the free surface. In order to study the speed effects on the phenomena of ship wave breaking, four different speeds, i.e. Fr = 0.26, 0.30, 0.32, 0.35, are investigated in calm water. Predicted resistance and wave patterns under Fr = 0.26 are validated with the available experiment data, and good agreement is achieved. For the Fr = 0.26 case, the wave pattern is steady, and the alternate variation of vorticity appear near the free surface is associated with the wake field. The breaking wave phenomena can be observed when the Froude number is over 0.32 and the Fr = 0.35 case shows most violent breaking bow wave. For the Fr = 0.35 case, the process of overturning and breaking of bow wave is observed clearly, and at the tail of bow wave, some breaking features of free surface are also captured. The reconnection of the initial plunger with the free surface results in a pair of counter-rotating vortex that is responsible for the second plunger and scar.
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9

Keskinen, Erno, Jori Montonen, Nikhil Sharma, and Michel Cotsaftis. "Dynamics of Ice Milling and Breaking During Arctic Ship Steering Operations." In ASME 2014 12th Biennial Conference on Engineering Systems Design and Analysis. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/esda2014-20508.

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Interest to sailing in arctic zone is increasing, as due to the climatic change, the seasons when northeast and northwest passages are open enough for see transportation, are getting every year longer and longer. Some other activities like oil and gas exploration and drilling at Barents Sea require also regular sea traffic connections to be opened. Sea operations at arctic zone are challenging, because thick ice generates a high magnitude dynamic load against the hull and the propulsion units. Turning and backward sailing in thick ice field are the most critical operations, in which the steerable propulsion units are in totally different service as in the regular open sea cruising. In such operations the ice field, when guided downwards along the slope of the hull, is broken to large plates, which then are fed against the propulsion unit. The steering propulsion unit itself is a vertically mounted inverse mast column, at the top of which the horizontally spinning propeller(s) can be vertically turned to follow the steering commands. Such cantilever structure is now under random collision process when the column is breaking the underwater ice plates to smaller blocks. For hydrodynamic reasons the column has a limited cross-sectional area as compared to the propeller area making it sensitive to bending vibrations. Another dynamic interaction with ice is coming from the periodical blade-ice contact when the ice blocks pushed down to the propulsion depth are completely milled by the units. These two parallel dynamic processes have been the reason for several serious damages and losses of propulsion units leading to expensive service operations by means of support vessels. The purpose of this study has been to model the underwater propulsion system with all essential structures, parts and interactions with the surrounding fluid field and floating ice blocks. This brings a complex analysis, in which random collisions and periodical machining forces are loading the elastic hull-mounted inverse mast column with high end mass. The response behavior led to predictions for the reasons of the observed damages especially in case of collapsed bolt connections in the units.
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Weymouth, Gabriel, Kelli Hendrickson, Dick K. P. Yue, Douglas G. Dommermuth, Paul Adams, and Randall Hand. "Modeling Breaking Ship Waves for Design and Analysis of Naval Vessels." In 2006 HPCMP Users Group Conference. IEEE, 2006. http://dx.doi.org/10.1109/hpcmp-ugc.2006.46.

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Reports on the topic "Ship breaking"

1

Rogness, James. The National Shipbuilding Research Program, 1991 Ship Production Symposium Proceedings: Paper No. IIA-2: Breaking the Chains of Tradition and Fantasy - A Revolutionary Approach to the Constraints on Productivity. Fort Belvoir, VA: Defense Technical Information Center, September 1991. http://dx.doi.org/10.21236/ada456630.

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