Effect of Ice and Wave Forces on the Design of Canadian Offshore Lighthouses

1975 ◽  
Vol 2 (2) ◽  
pp. 138-153
Author(s):  
J. V. Danys
Keyword(s):  
Wave Forces ◽  
Contact Areas ◽  
Impact Forces ◽  
The Pacific ◽  
Principal Factors ◽  
Main Factors ◽  
Ice Forces ◽  
Design And Construction

Wave and ice forces are the main factors to be considered when designing offshore lighthouses. With the exception of the Pacific and the southern part of the Atlantic coasts, the design of the majority of Canadian lighthouses is governed by the ice forces. For many years very little was known about the magnitude of ice forces. Experience and judgement were the principal factors in the design and construction of such unique structures as lighthouses in the middle of a lake. Even now knowledge of these forces is not complete and there are still no Canadian design standards.Sloped surfaces and cylindrical or conical shapes are used for the substructures of the lightpiers and the ice-structure contact areas are designed as small as practical to reduce ice impact forces.

The Japanese Fisheries Based in Singapore, 1892–1945

1997 ◽  
Vol 28 (2) ◽  
pp. 324-344 ◽  
Author(s):  
Hiroshi Shimizu
Keyword(s):  
Pacific War ◽  
Japanese Occupation ◽  
The Pacific ◽  
British Colony ◽  
Main Factors

This paper examines the main factors behind the rise and decline of the Japanese fisheries based in Singapore before the Pacific War, and shows that, as the fisheries contributed greatly to the Singapore economy, they did not constitute a foreign economic enclave in the British colony. It also describes how the Japanese and local fishermen conducted fisheries during the period from 1942 to 1945, and argues that the legacy of the Japanese fisheries outlived the Japanese occupation.

scholarly journals IMPACT WAVE FORCES ON VERTICAL AND HORIZONTAL PLATE

1978 ◽  
Vol 1 (16) ◽  
pp. 141
Author(s):  
S.R. Massel ◽  
M. Oleszkiewicz ◽  
W. Trapp
Keyword(s):  
Water Waves ◽  
Difficult Problem ◽  
Wave Forces ◽  
Horizontal Plate ◽  
Hydrodynamic Impact ◽  
Impact Forces ◽  
Wave Parameters ◽  
The Subject ◽  
The Impact ◽  
Impact Problem

The hydrodynamic impact problem is a very difficult problem because the physics of what actually happens during the instant of impact are not understood. Despite of fact that a large number of references exist on the subject, many questions are left unanswered. The object of this research is to investigate the problems of hydrodynamic impact associated with the water waves impacting on the vertical and horizontal plates..Of particular interest are the impact forces, their relation to the incident wave parameters and scale effect problems.

Mood Change of English, French and Chinese Immigrants in Ottawa-Gatineau Region, Canada

2015 ◽  
Vol 4 (1) ◽  
pp. 50
Author(s):  
Ning Tang ◽  
Colin MacDougall
Keyword(s):  
Marital Status ◽  
Belief Change ◽  
Mother Tongue ◽  
Status Change ◽  
Mood Change ◽  
Level Of Education ◽  
Self Reports ◽  
Principal Factors ◽  
Main Factors ◽  
Change Culture

This multicultural study aimed at examining moodchange of English, French and Chinese speaking immigrants in Ottawa-Gatineau Region, Canada, and identifying demographic factors that impact the change. 810 immigrants of English, French and Chinese speaking sub-groupswere recruited by purposive-sampling. Using self-reports, respondents answered questions regarding moodchange (moodstatus change and mood belief change) and demography in Multicultural Lifestyle Change Questionnaire of English, French or Chinese version. Data were analyzed statistically for the different immigrant sub-groups. Immigrants of different gender, language and category sub-groups exhibited different Mood Change Rates, Mood Improving Rates,Mood Declining Rates and MoodBelief Change Rates. There was no statistical difference between the ratesof immigrant sub-groups.Mood Change (MoodStatus Change + MoodBelief Change) was correlated positively with Mother Tongue and negatively with Speaking Languages. Mood Status  Change was negatively correlated with Marital Status and Highest Level of Education. Mother Tongue, Speaking Languages and Highest Level of Education significantly impacted MoodChange (Mood Status Change + Mood Belief Change). Marital Status and Highest Level of Education significantly influenced Mood Status Change. Immigrants of different sub-groups in Canada experienceddifferentmoodchanges. Marital Status and Highest Level of Educationwerethe main factors impacting Mood Status Change. Mother Tongue and Speaking Languages werethe principal factors influencing Mood Belief Change. Culture was an important factor contributing Mood Change. Acculturation could impact Mood Status Change and Mood Belief Change. Data of immigrant mood change can provide evidence for health policy-making and policy-revising in Canada.

Hydromechanics of submarine pipelines: design problems

1985 ◽  
Vol 12 (4) ◽  
pp. 863-874 ◽  
Author(s):  
John B. Herbich
Keyword(s):  
Field Measurements ◽  
External Pressure ◽  
Pressure Effects ◽  
Bottom Current ◽  
Wave Forces ◽  
Ocean Environment ◽  
Scour Protection ◽  
Hydrodynamic Wave ◽  
Pipeline Failures ◽  
Design And Construction

In recent years, the size, number, and applications of offshore pipelines have been steadily increasing. The design and construction of pipelines in offshore cold regions calls for special measures (such as deep burial) because of seabed scouring caused by ice.Various societies and associations have pointed out the deficiencies in the state-of-the-art areas of environmental, design, and construction factors, particularly those dealing with structural, external pressure effects, and depth of burial. It has also been recommended that more data be obtained in order to fully evaluate pipeline–soil interaction. Also, field measurements of velocities, accelerations, and forces causing scour around pipelines would greatly enhance our understanding of offshore pipeline behavior.Offshore pipelines fail in many different ways, and each mode of failure should be examined individually. Because of the complexity of the ocean environment it is quite difficult to evaluate pipeline failures in detail.Environmental factors such as hydrodynamic wave forces and currents, buoyancy forces due to liquefaction of sediment, and scouring potential are presented. The dynamics of scour, incipient sediment motion, depth of scour, and scour patterns around pipelines are also reviewed as well as the maximum scour depths as a function of bottom current velocity.Methods for scour protection in shallow and deep water are described as well as the need for inspection and maintenance to prevent failures. Key words: pipelines, offshore, hydrodynamic forces, cover, scour.

scholarly journals Determinación de los principales factores geométricos que influyen en el desgaste de las matrices de extrusión directa empleadas en la obtención en frío de perfiles de aleaciones de aluminio

2019 ◽  
Vol 20 (4) ◽  
pp. 1-11
Author(s):  
Santiago Amaury Santana Reyes ◽  
Raúl Santana Milán ◽  
Yans Guardia Puebla ◽  
José Félix Morales Leslie
Keyword(s):  
Friction Coefficient ◽  
Incidence Angle ◽  
Wear Intensity ◽  
Extrusion Ratio ◽  
Fractional Factorial ◽  
Entrance Length ◽  
Die Wear ◽  
Aisi D2 ◽  
Principal Factors ◽  
Main Factors

Within most employed processes of forming for series productions are extrusion processes. Die wear is one of the major disadvantages of this technological process, so that efforts are made to predict and mitigate its effect on the tool. In this research it simulates by the Finite Element Method, using the DEFORMTM-2D, the process of cold direct extrusion of aluminum alloys 6061-O in a die material AISI D2. It was analyzed geometric parameters of the die such as: the insidence angle, the extrusion ratio, the input radii, the bearing entrance length on the tool, and the friction coefficient; to determine the influence on the tool wear. The Archard's wear model is used to determine the wear intensity in the critical area of tool. The Plackett-Burman fractional factorial design is used to determine the main factors influencing the die wear standing out: the extrusion ratio, friction coefficient and the incidence angle as the main factors that affect the die wear and to a less extent the bearing entrance length at the entrance of the tool of the material and inputs radii. The principal factors have been related from a linear response surface.

scholarly journals Mood Change of English, French and Chinese Immigrants in Ottawa-Gatineau Region, Canada

2015 ◽  
Vol 4 (1) ◽  
pp. 50
Author(s):  
Ning Tang ◽  
Colin MacDougall
Keyword(s):  
Marital Status ◽  
Belief Change ◽  
Mother Tongue ◽  
Status Change ◽  
Mood Change ◽  
Level Of Education ◽  
Self Reports ◽  
Principal Factors ◽  
Main Factors ◽  
Change Culture

This multicultural study aimed at examining moodchange of English, French and Chinese speaking immigrants in Ottawa-Gatineau Region, Canada, and identifying demographic factors that impact the change. 810 immigrants of English, French and Chinese speaking sub-groupswere recruited by purposive-sampling. Using self-reports, respondents answered questions regarding moodchange (moodstatus change and mood belief change) and demography in Multicultural Lifestyle Change Questionnaire of English, French or Chinese version. Data were analyzed statistically for the different immigrant sub-groups. Immigrants of different gender, language and category sub-groups exhibited different Mood Change Rates, Mood Improving Rates,Mood Declining Rates and MoodBelief Change Rates. There was no statistical difference between the ratesof immigrant sub-groups.Mood Change (MoodStatus Change + MoodBelief Change) was correlated positively with Mother Tongue and negatively with Speaking Languages. Mood Status  Change was negatively correlated with Marital Status and Highest Level of Education. Mother Tongue, Speaking Languages and Highest Level of Education significantly impacted MoodChange (Mood Status Change + Mood Belief Change). Marital Status and Highest Level of Education significantly influenced Mood Status Change. Immigrants of different sub-groups in Canada experienceddifferentmoodchanges. Marital Status and Highest Level of Educationwerethe main factors impacting Mood Status Change. Mother Tongue and Speaking Languages werethe principal factors influencing Mood Belief Change. Culture was an important factor contributing Mood Change. Acculturation could impact Mood Status Change and Mood Belief Change. Data of immigrant mood change can provide evidence for health policy-making and policy-revising in Canada.

scholarly journals THE DESIGN AMD CONSTRUCTION OF THE NEW OIL PORT IN DALIAN, C.P.R.

1980 ◽  
Vol 1 (17) ◽  
pp. 125
Author(s):  
Zhu Zhuang
Keyword(s):  
Mooring Line ◽  
Wave Forces ◽  
Exciting Forces ◽  
The Impact ◽  
Design And Construction

The construction of New Oil Port in Dalian, C.P.R., was started around the end 1974 and completed in autumn 1976.In this paper a summary of the essential considerations in design and construction of this oil port, such as the planning of the pier, the determination of exciting forces (namely wave forces, forces due to earthquake, mooring line forces and berthing forces due to the impact of tanker on the fenders)on structures, the design of the large cylindrical cassion with a diameter of 9m and a height up to 19.7m and the construction of connecting bridges by two types, is presented.

scholarly journals Different Interests Explain Different Proposals: The Contestation of Indo-Pacific Cooperation Framework between ASEAN and the US

2019 ◽  
Vol 13 (2) ◽  
pp. 1
Author(s):  
Sri Yunanto ◽  
Galby Rifqi Samhudi
Keyword(s):  
Major Power ◽  
Strategic Assessment ◽  
The Pacific ◽  
The Us ◽  
Us Government ◽  
Challenges And Opportunities ◽  
Rise Of China ◽  
The Pacific Ocean ◽  
Main Factors ◽  
The Rise Of China

The rise of China that goes along with strategic shifts around the Indian and the Pacific Ocean has started a new stage of major power contestation recently. ASEAN which acts as a host in Southeast Asia has certain stands to deal with the challenges and opportunities presented by the competition. On the other hand, the US Government with its global interests will never ever allow this region to fall into China’s influence. Simultaneously, both ASEAN and the US have the same approach in this situation to utilize the framework of Indo-Pacific cooperation that is definitively open to any explication in order to gain advantages resulted from the global interaction over the region. Nevertheless, their perceptions on the matter of defining the cooperative framework of Indo-Pacific are apparently diverse. Hence, this paper attempts to analyze the rationale of ASEAN and the US development of the Indo-Pacific cooperative concept based on their respective strategic assessment. This paper argues that the distinctive interests and insight of threats from ASEAN and the US toward the rise of China as well as major power contestation in the region are being the two main factors in their different perceptions on the concept of Indo-Pacific cooperative framework.

scholarly journals DESIGN AND CONSTRUCTION OF JETTIES

2010 ◽  
Vol 1 (1) ◽  
pp. 26 ◽  
Author(s):  
R. E. Hickson ◽  
F. W. Rodolf
Keyword(s):  
United States ◽  
Pacific Coast ◽  
The United States ◽  
The Pacific ◽  
Wave Heights ◽  
Design And Construction

The purpose of this paper is to present a brief outline of the general engineering procedure for the siting and design of jetties and the methods of constructing such structures. After a general presentation of the formulae proposed by various engineers to determine the size and weight of individual pieces of stone or other material which should be used under various wave heights, this paper will be devoted principally to the construction of rubble stone jetties. This is the type principally used on the Pacific Coast of the United States.

Discussion on Design and Construction of Soil and Foundation in Coastal Saline Soil Area

2011 ◽  
Vol 90-93 ◽  
pp. 645-650
Author(s):  
Fu Ju Gao
Keyword(s):  
Mechanical Properties ◽  
Saline Soil ◽  
Important Influence ◽  
Paper Briefly ◽  
Coastal Saline Soil ◽  
Main Factors ◽  
Soil Area ◽  
Design And Construction

Based on the recent 20 years' observation and research, this paper briefly discusses the mechanism of forming, mechanical properties of coastal saline soil and the main factors which bring the important influence to buildings. Some reasonable comments on design and construction of the work in this area are put forward.

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