Sensitivity of the Expected Ships Availability to Different Seakeeping Criteria

Author(s):  
Nuno Fonseca ◽  
Carlos Guedes Soares

The paper presents a methodology to calculate the seakeeping performance of ships, which is given as an operability index, and discusses the sensitivity of the results to the use of different seakeeping criteria. The calculation of the operability index, which represents the percentage of time during which the ship is operational, depends on the wave climate of the ocean area where the ship operates, the dynamic response of the ship to the waves, and the ship mission. The relation between the ship operability and the mission characteristics is established through the seakeeping criteria. The calculation of operability indexes and the sensitivity analysis are carried out for a containership operating in the North Atlantique between Europe and the United states, and a fishing vessel operating near the Portuguese west coast. These are two ships with different mission profiles, which permits assessment of the sensitivity of the estimated operability index to different ship types.

2021 ◽  
pp. 142-165
Author(s):  
Benjamin Hoy

By 1874, Canada and the United States had surveyed land and placed boundary stones over 6,000 kilometers of territory. They had established a cohesive skeleton for the border in every major region except the Arctic. Drawing on government correspondence, annual reports, and paylists, chapter 7 rebuilds the bureaucratic footprint of the Canada–US border at the end of the nineteenth century. It maps the positions and operations of the North-West Mounted Police and American soldiers as well as customs, immigration, and Indian Affairs personnel. In doing so, it shows how the border diverged across the East Coast, Great Lakes, Prairies, West Coast, and Artic, as well as differentiating the US approach to its border with Canada and Mexico.


2009 ◽  
Vol 58 (7) ◽  
pp. 1045-1051 ◽  
Author(s):  
Emma Moore ◽  
Shannon Lyday ◽  
Jan Roletto ◽  
Kate Litle ◽  
Julia K. Parrish ◽  
...  

2017 ◽  
Vol 15 (1-2) ◽  
pp. 85-108
Author(s):  
Prema Kurien

There are large South Asian settlements in the larger Vancouver region of British Columbia in Canada and in Northern and Central California (from Yuba City to Fresno) in the United States. While the early migration patterns of Sikhs and Hindus to these two areas were similar, they subsequently diverged and the South Asian settlements in the two regions now exhibit very different profiles. This resource paper summarizes and analyzes the literature on factors shaping the migration, settlement, and incorporation patterns of Asian immigrants in these two regions. I argue that the parallels in early South Asian migration patterns to the North American West Coast were due to similarities in the economic and social profile of these regions, Canadian and U.S. policies toward Asian immigrants, and easy movement between Canada and the United States. The divergence between the two regions took place over time largely as an outcome of changes in regional characteristics (e.g., the development of Silicon Valley), differences in the group characteristics and networks of Sikhs and Hindus, and an increasing divergence in Canadian and U.S. immigration regulations (e.g., differences in family reunification, refugee, and H1-B visa policies). The final section discusses how these settlement patterns have led to differences in the identity formation and sociopolitical incorporation of Sikhs and Hindus in the two regions.


Author(s):  
Federico Varese

Organized crime is spreading like a global virus as mobs take advantage of open borders to establish local franchises at will. That at least is the fear, inspired by stories of Russian mobsters in New York, Chinese triads in London, and Italian mafias throughout the West. As this book explains, the truth is more complicated. The author has spent years researching mafia groups in Italy, Russia, the United States, and China, and argues that mafiosi often find themselves abroad against their will, rather than through a strategic plan to colonize new territories. Once there, they do not always succeed in establishing themselves. The book spells out the conditions that lead to their long-term success, namely sudden market expansion that is neither exploited by local rivals nor blocked by authorities. Ultimately the inability of the state to govern economic transformations gives mafias their opportunity. In a series of matched comparisons, the book charts the attempts of the Calabrese 'Ndrangheta to move to the north of Italy, and shows how the Sicilian mafia expanded to early twentieth-century New York, but failed around the same time to find a niche in Argentina. The book explains why the Russian mafia failed to penetrate Rome but succeeded in Hungary. A pioneering chapter on China examines the challenges that triads from Taiwan and Hong Kong find in branching out to the mainland. This book is both a compelling read and a sober assessment of the risks posed by globalization and immigration for the spread of mafias.


2021 ◽  
pp. 1-20
Author(s):  
Ayana Omilade Flewellen ◽  
Justin P. Dunnavant ◽  
Alicia Odewale ◽  
Alexandra Jones ◽  
Tsione Wolde-Michael ◽  
...  

This forum builds on the discussion stimulated during an online salon in which the authors participated on June 25, 2020, entitled “Archaeology in the Time of Black Lives Matter,” and which was cosponsored by the Society of Black Archaeologists (SBA), the North American Theoretical Archaeology Group (TAG), and the Columbia Center for Archaeology. The online salon reflected on the social unrest that gripped the United States in the spring of 2020, gauged the history and conditions leading up to it, and considered its rippling throughout the disciplines of archaeology and heritage preservation. Within the forum, the authors go beyond reporting the generative conversation that took place in June by presenting a road map for an antiracist archaeology in which antiblackness is dismantled.


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