ARCO Tanker Slamming Study

1993 ◽  
Vol 30 (03) ◽  
pp. 135-147
Author(s):  
Peter Lacey ◽  
Rod Edwards

ARCO Marine currently operates ten tankers which move crude oil from Valdez, Alaska to West Coast ports of the United States. These tankers range in size from 70 000 to 265 000 dwt and operate throughout the year in the harsh environment of the North Pacific Ocean. Some of these ships have experienced bow structural damage, presumably due to slamming in heavy weather conditions. In late 1990 ARCO initiated a program with Arctec Offshore Inc. and Ocean Systems Inc. to investigate slamming of ARCO tankers. This ongoing effort focuses on three issues: the frequency of occurrence and intensity of impacts; the relationship between the impact characteristics, sea conditions, and ship motions; and the development of an onboard slam monitoring and warning system. During the winter of 1991 data were collected aboard two ARCO 190 000 dwt San Diego Class tankers. This paper describes the data acquisition program, including the problems encountered, the preliminary interpretation of the collected data, and plans for continuation of the program.

Author(s):  
Earl H. Fry

This article examines the ebb and flow of the Quebec government’s economic and commercial relations with the United States in the period 1994–2017. The topic demonstrates the impact of three major forces on Quebec’s economic and commercial ties with the US: (1) the North American Free Trade Agreement (NAFTA) which became operational in 1994 and was fully implemented over a 15-year period; (2) the onerous security policies put in place by the US government in the decade following the horrific events of 11 September 2001; and (3) changing economic circumstances in the United States ranging from robust growth to the worst recession since the Great Depression of the 1930s. The article also indicates that the Quebec government continues to sponsor a wide range of activities in the United States, often more elaborate and extensive than comparable activities pursued by many nation-states with representation in the US. 1 1 Stéphane Paquin, ‘Quebec-U.S. Relations: The Big Picture’, American Review of Canadian Studies 46, no. 2 (2016): 149–61.


Author(s):  
Oleh Bulka

The article is devoted to the particularity of Canada-Mexico bilateral relations in the period from their beginning to signing and entry into force the North American Free Trade Agreement (NAFTA). It is noted that from the time of first contacts bilateral relations between two countries have developed unevenly with periods of increase and periods of decline. It is determined that in the history of Canada-Mexico relations before signing NAFTA can be identified four main periods. The first one is a period of early contacts that lasted from the end of XIX century to the establishment of the official diplomatic relations between Canada and Mexico in 1944. In this period of time ties between the two countries were extremely weak. The second period lasted from 1944 to the end of the 1960s. This period clearly shows the limits of cooperation between Canada and Mexico after the establishment of the official diplomatic ties, but it is also possible to see a certain coincidence between the values and diplomatic strategies of these countries. The third period of Canada-Mexico relations lasted from the beginning of the 1970s to the end of the 1980s. During this period, both Canada and Mexico try to diversify their foreign policy and strengthen the organizational mechanism of mutual cooperation. But it is also shown that despite the warm political rhetoric, there was some distance in Canada-Mexico relations. The fourth period of the relations lasted from the late 1980s until the NAFTA treaty came into force in 1994. At that time Canadian and Mexican governments began to give priority to economic relations over political and diplomatic ones. It was revealed that the main influencing factors of bilateral relations between Mexico and Canada were the impact of third countries, especially the United Kingdom and the United States, regional and global economic conditions, and the attitude to the bilateral relations of the political elites of both countries.


1995 ◽  
Vol 32 (04) ◽  
pp. 277-296
Author(s):  
David J. Witmer ◽  
Jack W. Lewis

BP Oil Company time-charters a fleet of American-flag tankers for the ocean transportation of crude oil and petroleum products to the East, West and Gulf Coasts of the United States. Commencing in 1991, ship response and structural monitoring instrumentation was installed on the four ships of the Atigun Pass-class. These crude carriers are operated in the Trans-Alaska Pipeline Service, or "TAPS" trade, sailing the waters of the North Pacific Ocean and Gulf of Alaska. The structural monitoring systems were designed to measure the effects of subjecting a ship to the typical loads and forces encountered while at sea: hogging, sagging, slamming, hydrostatic pressure, and hull girder springing. Additionally, BP was interested in developing a system that could provide shiphandling guidance to the master or watch officer so that the detrimental effects of prolonged exposure to such loads and forces could be effectively minimized. The paper describes in detail the physical arrangement of the BP Oil Tanker Structural Monitoring System (BPSMS), including the suite of sensors employed to measure ship responses and hull girder stresses. It explains how the response data collected by the sensors is analyzed by the onboard computer located on the ship's bridge and how ship response data are presented back to the deck officers via a family of display monitor screens. These displays provide the officers with a "tool" that can be used to effectively monitor the physical and structural response of their ship to waves, and to quantify, in terms of lowering the wave bending moment and reducing the risk of slamming, the result of an action or actions taken to minimize the risk of incurring structural damage. Onboard ship response and structural monitoring is now an integral part of BP's tanker fleet structural management program. The units have greatly increased the awareness of the ship's officers regarding their role in helping to control the amount of structural damage done to the ships. Data from the units have also helped management make more informed decisions regarding operational requirements placed on the ships.


Author(s):  
A.V. Goncharenko ◽  
T.O. Safonova

The article investigates the impact of Great Britain on the evolution of colonialism in the late ХІХ and early ХХ centuries. It is analyzed the sources and scientific literature on the policy of the United Kingdom in the colonial question in the late ХІХ – early ХХ century. The reasons, course and consequences of the intensification of British policy in the colonial problem are described. The process of formation and implementation of London’s initiatives in the colonial question during the period under study is studied. It is considered the position of Great Britain on the transformation of the colonial system in the late XIX – early XX centuries. The resettlement activity of the British and the peculiarities of their mentality, based on the idea of racial superiority and the new national messianism, led to the formation of developed resettlement colonies. The war for the independence of the North American colonies led to the formation of a new state on their territory, and the rest of the “white” colonies of Great Britain had at the turn of the XIX-XX centuries had to build a new policy of relations, taking into account the influence of the United States on them, and the general decline of economic and military-strategic influence of Britain in the world, and the militarization of other leading countries. As a result, a commonwealth is formed instead of an empire. With regard to other dependent territories, there is also a change in policy towards the liberalization of colonial rule and concessions to local elites. In the late ХІХ – early ХІХ centuries the newly industrialized powers (Germany, Italy, and Japan) sought to seize the colonies to reaffirm their new status in the world, the great colonial powers of the past (Spain, Portugal, and the Netherlands) sought to retain what remained to preserve their international prestige, and Russia sought to expand. The largest colonial empires, Great Britain and France, were interested in maintaining the status quo. In the colonial policy of the United Kingdom, it is possible to trace a certain line related to attempts to preserve the situation in their remote possessions and not to get involved in conflicts and costly measures where this can be avoided. In this sense, the British government showed some flexibility and foresight – the relative weakening of the military and economic power of the empire due to the emergence of new states, as well as the achievement of certain self-sufficiency, made it necessary to reconsider traditional foreign policy. Colonies are increasingly no longer seen as personal acquisitions of states, and policy toward these territories is increasingly seen as a common deal of the international community and even its moral duty. The key role here was to be played by Great Britain, which was one of the first to form the foundations of a “neocolonial” system that presupposes a solidarity policy of Western countries towards the rest of the world under the auspices of London. Colonial system in the late ХІХ – early ХІХ century underwent a major transformation, which was associated with a set of factors, the main of which were – the emergence of new industrial powers on the world stage, the internal evolution of the British Empire, changes in world trade, the emergence of new weapons, general growth of national and religious identity and related with this contradiction. The fact that the First World War did not solve many problems, such as Japanese expansionism or British marinism, and caused new ones, primarily such as the Bolshevik coup in Russia and the coming to power of the National Socialists in Germany, the implementation of the above trends stretched to later moments.


2021 ◽  

Abstract Because of the long-standing Canada-United States lumber trade dispute and the current pressure on the world's forests as a renewable energy source, much attention has been directed toward the modelling of international trade in wood products. Two types of trade models are described in this book: one is rooted in economic theory and mathematical programming, and the other consists of two econometric/statistical models--a gravity model rooted in theory and an approach known as GVAR that relies on time series analyses. The purpose of the book is to provide the background theory behind models and enable readers to easily construct their own models to analyze policy questions, whether in forestry or another sector. Examples in the book illustrate how models can be used to say something about a variety of issues, including identification of the gains and losses to various players in the North American softwood lumber business, and the potential for redirecting sales of lumber to countries outside the United States. The discussion is expanded to include other products besides lumber, and used to examine, for example, the effects of log export restrictions by one naton on all other forestry jurisdictions, the impacts of climate policies as they relate to the global forest sector, and the impact of oil prices on forest product markets throughout the world.


Plant Disease ◽  
2007 ◽  
Vol 91 (6) ◽  
pp. 719-726 ◽  
Author(s):  
Amy D. Ziems ◽  
Loren J. Giesler ◽  
George L. Graef ◽  
Margaret G. Redinbaugh ◽  
Jean L. Vacha ◽  
...  

Bean pod mottle virus (BPMV) has become increasingly common in soybean throughout the north-central region of the United States. Yield loss assessments on southern soybean germplasm have reported reductions ranging from 3 to 52%. Currently, no soybean cultivars have been identified with resistance to BPMV. The objective of this study was to determine the impact of BPMV infection on soybean cultivars representing a broad range of northern soybean germ-plasm by comparing inoculated and noninoculated soybean plants in paired row studies. In all, 30 and 24 cultivars were evaluated in Nebraska (NE) in which soybean plants were inoculated at the V3 to V4 growth stage. Eleven cultivars from public and breeding lines were inoculated at the VC and R5 to R6 growth stages in Ohio (OH). Disease severity, yield, and percent seed coat mottling were assessed at both locations, whereas protein and oil content also were assessed at NE. Yield and percent seed coat mottling was significantly reduced following inoculation at the VC (OH) and V3 to V4 (NE) growth stages. In addition, seed oil and protein composition were impacted in 1 of the 2 years of the study. This study demonstrates that substantial yield losses can occur in soybean due to BPMV infection. In addition, protein and oil may be affected depending on the environment during the production season.


2013 ◽  
Vol 70 (5) ◽  
pp. 1013-1022 ◽  
Author(s):  
Nan-Jay Su ◽  
Chi-Lu Sun ◽  
André E. Punt ◽  
Su-Zan Yeh ◽  
Gerard DiNardo ◽  
...  

Abstract Su, N.-J., Sun, C.-L., Punt, A. E., Yeh, S.-Z., DiNardo, G., and Chang, Y.-J. 2013. An ensemble analysis to predict future habitats of striped marlin (Kajikia audax) in the North Pacific Ocean. – ICES Journal of Marine Science, 70: 1013–1022. Striped marlin is a highly migratory species distributed throughout the North Pacific Ocean, which shows considerable variation in spatial distribution as a consequence of habitat preference. This species may therefore shift its range in response to future changes in the marine environment driven by climate change. It is important to understand the factors determining the distribution of striped marlin and the influence of climate change on these factors, to develop effective fisheries management policies given the economic importance of the species and the impact of fishing. We examined the spatial patterns and habitat preferences of striped marlin using generalized additive models fitted to data from longline fisheries. Future distributions were predicted using an ensemble analysis, which represents the uncertainty due to several global climate models and greenhouse gas emission scenarios. The increase in water temperature driven by climate change is predicted to lead to a northward displacement of striped marlin in the North Pacific Ocean. Use of a simple predictor of water temperature to describe future distribution, as in several previous studies, may not be robust, which emphasizes that variables other than sea surface temperatures from bioclimatic models are needed to understand future changes in the distribution of large pelagic species.


2003 ◽  
Vol 11 (2) ◽  
pp. 103-139 ◽  
Author(s):  
Robie W Macdonald ◽  
Brian Morton ◽  
Sophia C Johannessen

Chemical contaminants in the North Pacific Ocean include hydrocarbons, persistent organic pollutants, metals, persistent solids, and domestic pollutants. Here, we review contaminant research conducted over the past decade, finding that the effects of contaminants cannot be considered in isolation from other major factors causing change to North Pacific ecosystems. Climate change, over-fishing, habitat destruction, eutrophication, and the introduction of exotic species interact with one another and alter contaminant pathways. Climate change and over-fishing are perceived as the main threats to the remote northern marginal seas, the central North Pacific, and the west coast of North America, with contaminants engendering local concern, especially in semi-enclosed bodies of water. Climate change receives less attention in Asian waters, probably because widespread habitat destruction and contamination provide, by themselves, an impending ecological disaster. A systematic approach is urgently required to recognize and prioritize the threats to North Pacific coastal ecosystems. This should include box models, case studies, proxy records, and time series. The ocean should be monitored as a system, including physical media (water, sediment) and the full trophic range of the food web, and tissues should be preserved in archives to provide a resource for understanding emerging concerns. Finally, the development of ecological indicators is urgently required to provide a robust warning system based on the health of the marine ecosystems themselves. It is time to conduct a multi-national assessment of the North Pacific Ocean to develop a common, factual awareness of the threats looming over our coastal waters. Key words: contaminants, climate change, ecosystem change, monitoring, North Pacific, trends.


Author(s):  
Juan Carlos Lara Gálvez ◽  
Alan M. Sears

This chapter discusses the impact of free trade agreements (FTAs) on intermediary liability in Latin America, with special emphasis on the Digital Millennium Copyright Act’s (DMCA) provisions that have been included into every bilateral FTA the United States has entered into since 2002, thus promoting their inclusion in the national law of other countries. However, these provisions are controversial, and whether they drive the internet economy or create a more restrictive online space is a matter of debate. This chapter analyses the impact of such provisions in Latin American countries and the state of their implementation in national jurisdictions. In particular, this chapter reviews implementation and proposed implementation of the DMCA model in Chile, Costa Rica and other CAFTA bloc countries, Colombia, and Peru. It also discusses the failure of the Trans-Pacific Partnership Agreement to create new intermediary liability rules and how the same language was ultimately included in the revision of the North American Free Trade Agreement (NAFTA), which became the US–Mexico–Canada Agreement (USMCA).


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