scholarly journals Investigation of the Modulation of the Tidal Stream Resource by Ocean Currents through a Complex Tidal Channel

2019 ◽  
Vol 7 (10) ◽  
pp. 341 ◽  
Author(s):  
Alice J. Goward Brown ◽  
Matt Lewis ◽  
Benjamin I. Barton ◽  
Gus Jeans ◽  
Steven A. Spall
Keyword(s):  
Tidal Energy ◽  
Resource Assessment ◽  
Tidal Currents ◽  
The West ◽  
Ocean Modelling ◽  
Through Flow ◽  
The World ◽  
Tidal Stream ◽  
Flow Through ◽  
Resource Uncertainty

Tidal energy has the opportunity to bring reliable electricity to remote regions in the world. A resource assessment, including the response of the tidal stream resource to fluctuations in the Indonesian Through Flow (ITF) is performed using the Regional Ocean Modelling System (ROMS) to simulate four different scenarios for flow through the Lombok Strait in Indonesia. Tidal currents simulated with a variable ITF are compared against a tide-only (TO) simulation to identify how the ITF spatially changes the resource across the Lombok Strait. We find that the uncertainty in the tidal currents from the TO simulation is 50% greater than the variable ITF simulation. To identify change to resource, surface velocities from Strong ITF and Weak ITF scenarios are considered. As a result of the fluctuations in the ITF, certain characteristics, such as the asymmetry and magnitude, of the tidal current vary greatly. However, the magnitude of change is variable, with regions to the west of the strait experiencing greater modulation than in the east, suggesting that resource uncertainty can be minimised with selective site positioning.

scholarly journals III. On the tidal currents on the west coast of Scotland

1867 ◽  
Vol 15 ◽  
pp. 42-46 ◽  
Keyword(s):  
West Coast ◽  
Great Part ◽  
Tidal Currents ◽  
The Other ◽  
English Channel ◽  
The West ◽  
Slack Water ◽  
Tidal Stream ◽  
The Times ◽  
Different Parts

The tidal currents on that part of the west coast of Scotland which is comprised between the Mull of Cantyre and the Island of Mull run in general with great velocity. Their velocity, direction, and the time of their change, or of slack water, are therefore matters of great importance to navigators. On the other hand, the rise and fall of the tide is so small, and the depth of water in the channels and the harbours so considerable, that the times of high and low water are of comparatively small import­ance. While the laws of the currents are thus of more importance than the laws of the rise and fall of the tide, they are also much more simple. The times of high and low water are very different at different parts of the oast, while the times of slack water are nearly the same throughout the whole region in question. In a great part of this region the current, which sets for six hours in one direction, has no distinct title to be considered either a flood tide or an ebb tide. The consequence is, that to describe the laws of the currents by reference to the time of high and low water, introduces great and unnecessary complexity. The application to the currents of the method first applied by Admiral Beechey to the tidal stream of the English Channel and German Ocean (Phil. Trans. 1851, p. 703) introduces at once order and simplicity, and makes that intelligible which before was only a confused maze.

scholarly journals Sedimentological data-driven bottom friction parameter estimation in modelling Bristol Channel tidal dynamics

2021 ◽  
Author(s):  
Simon Warder ◽  
Athanasios Angeloudis ◽  
Matthew Piggott
Keyword(s):  
Parameter Estimation ◽  
Model Performance ◽  
Resource Assessment ◽  
Tidal Currents ◽  
Bottom Friction ◽  
Tidal Range ◽  
Piecewise Constant ◽  
Sea Bed ◽  
Tidal Stream

Accurately representing the bottom friction effect is a significant challenge in numerical tidal models. Bottom friction effects are commonly defined via parameter estimation techniques. However, the bottom friction coefficient (BFC) can be related to the roughness of the sea bed. Therefore, sedimentological data can be beneficial in estimating BFCs. Taking the Bristol Channel and Severn Estuary as a case study, we perform a number of BFC parameter estimation experiments, utilising sedimentological data in a variety of ways. Model performance is explored through the results of each parameter estimation experiment, including applications to tidal range and tidal stream resource assessment. We find that theoretically derived sediment-based BFCs are in most cases detrimental to model performance. However, good performance is obtained by retaining the spatial information provided by the sedimentological data in the formulation of the parameter estimation experiment; the spatially varying BFC can be represented as a piecewise-constant field following the spatial distribution of the observed sediment types. By solving the resulting low-dimensional parameter estimation problem, we obtain good model performance as measured against tide gauge data. This approach appears well suited to modelling tidal range energy resource, which is of particular interest in the case study region. However, the applicability of this approach for tidal stream resource assessment is limited, since modelled tidal currents exhibit a strong localised response to the BFC; the use of piecewise-constant (and therefore discontinuous) BFCs is found to be detrimental to model performance for tidal currents.

Prevalence of Suicidal Ideation in Sri Lanka

Crisis ◽  
2010 ◽  
Vol 31 (1) ◽  
pp. 30-35 ◽  
Author(s):  
Sudath Samaraweera ◽  
Athula Sumathipala ◽  
Sisira Siribaddana ◽  
S. Sivayogan ◽  
Dinesh Bhugra
Keyword(s):  
Suicidal Ideation ◽  
Sri Lanka ◽  
General Population ◽  
Suicide Attempts ◽  
National Average ◽  
The West ◽  
Suicide Methods ◽  
Suicide Rates ◽  
Completed Suicide ◽  
The World

Background: Suicidal ideation can often lead to suicide attempts and completed suicide. Studies have shown that Sri Lanka has one of the highest rates of suicide in the world but so far no studies have looked at prevalence of suicidal ideation in a general population in Sri Lanka. Aims: We wanted to determine the prevalence of suicidal ideation by randomly selecting six Divisional Secretariats (Dss) out of 17 in one district. This district is known to have higher than national average rates of suicide. Methods: 808 participants were interviewed using Sinhala versions of GHQ-30 and Beck’s Scale for Suicidal Ideation. Of these, 387 (48%) were males, and 421 (52%) were female. Results: On Beck’s Scale for Suicidal Ideation, 29 individuals (4%) had active suicidal ideation and 23 (3%) had passive suicidal ideation. The active suicidal ideators were young, physically ill and had higher levels of helplessness and hopelessness. Conclusions: The prevalence of suicidal ideation in Sri Lanka is lower than reported from the West and yet suicide rates are higher. Further work must explore cultural and religious factors.

Psychology from Egyptian, Arab, and Islamic Perspectives

1997 ◽  
Vol 2 (4) ◽  
pp. 356-365 ◽  
Author(s):  
Fouad A-L.H. Abou-Hatab
Keyword(s):  
Professional Identity ◽  
21St Century ◽  
The West ◽  
Islamic Perspective ◽  
National Heritage ◽  
Western Psychology ◽  
The World ◽  
The One

This paper presents the case of psychology from a perspective not widely recognized by the West, namely, the Egyptian, Arab, and Islamic perspective. It discusses the introduction and development of psychology in this part of the world. Whenever such efforts are evaluated, six problems become apparent: (1) the one-way interaction with Western psychology; (2) the intellectual dependency; (3) the remote relationship with national heritage; (4) its irrelevance to cultural and social realities; (5) the inhibition of creativity; and (6) the loss of professional identity. Nevertheless, some major achievements are emphasized, and a four-facet look into the 21st century is proposed.

Searching for new Sources of growth. Are the Developing Countries Catching up with the Developed ones?

2015 ◽  
pp. 30-53
Author(s):  
V. Popov
Keyword(s):  
Developing Countries ◽  
Western Europe ◽  
Gdp Per Capita ◽  
The West ◽  
Catching Up ◽  
The Us ◽  
The World ◽  
Economic Divergence ◽  
Per Capita ◽  
Relative Standing

This paper examines the trajectory of growth in the Global South. Before the 1500s all countries were roughly at the same level of development, but from the 1500s Western countries started to grow faster than the rest of the world and PPP GDP per capita by 1950 in the US, the richest Western nation, was nearly 5 times higher than the world average and 2 times higher than in Western Europe. Since 1950 this ratio stabilized - not only Western Europe and Japan improved their relative standing in per capita income versus the US, but also East Asia, South Asia and some developing countries in other regions started to bridge the gap with the West. After nearly half of the millennium of growing economic divergence, the world seems to have entered the era of convergence. The factors behind these trends are analyzed; implications for the future and possible scenarios are considered.

Comparing Comparisons: Political Implications of Different Notions of Difference

2016 ◽  
Vol 13 (1) ◽  
pp. 7-26
Author(s):  
Glenn Odom
Keyword(s):  
Cultural Studies ◽  
World Literature ◽  
The West ◽  
Political Debates ◽  
Political Implications ◽  
The World ◽  
Critical Attention ◽  
David Damrosch ◽  
Location Point

With the rise of the American world literature movement, questions surrounding the politics of comparative practice have become an object of critical attention. Taking China, Japan and the West as examples, the substantially different ideas of what comparison ought to do – as exhibited in comparative literary and cultural studies in each location – point to three distinct notions of the possible interactions between a given nation and the rest of the world. These contrasting ideas can be used to reread political debates over concrete juridical matters, thereby highlighting possible resolutions. This work follows the calls of Ming Xie and David Damrosch for a contextualization of different comparative practices around the globe.

Squatting: The Fight for Decent Shelter, 1970s–1980s

2018 ◽  
Vol 11 (1) ◽  
pp. 27-50
Author(s):  
John Marsland
Keyword(s):  
Welfare State ◽  
Public Services ◽  
Second World War ◽  
World War ◽  
Housing Policies ◽  
The West ◽  
The World ◽  
Housing Needs ◽  
Post War ◽  
Second World

During the twenty years after the Second World War, housing began to be seen as a basic right among many in the west, and the British welfare state included many policies and provisions to provide decent shelter for its citizens. This article focuses on the period circa 1968–85, because this was a time in England when the lack of affordable, secure-tenured housing reached a crisis level at the same time that central and local governmental housing policies received wider scrutiny for their ineffectiveness. My argument is that despite post-war laws and rhetoric, many Britons lived through a housing disaster and for many the most rational way they could solve their housing needs was to exploit loopholes in the law (as well as to break them out right). While the main focus of the article is on young British squatters, there is scope for transnational comparison. Squatters in other parts of the world looked to their example to address the housing needs in their own countries, especially as privatization of public services spread globally in the 1980s and 1990s. Dutch, Spanish, German and American squatters were involved in a symbiotic exchange of ideas and sometimes people with the British squatters and each other, and practices and rhetoric from one place were quickly adopted or rejected based on the success or failure in each place.

Slavery and the Trumpocene: It's Not the End of the World

2019 ◽  
Vol 41 (1) ◽  
pp. 40-50
Author(s):  
Claire Colebrook
Keyword(s):  
Living System ◽  
Racial Violence ◽  
First Century ◽  
The West ◽  
The Earth ◽  
The World ◽  
End Of The World ◽  
Twenty First Century ◽  
Geological Period

There is something more catastrophic than the end of the world, especially when ‘world’ is understood as the horizon of meaning and expectation that has composed the West. If the Anthropocene is the geological period marking the point at which the earth as a living system has been altered by ‘anthropos,’ the Trumpocene marks the twenty-first-century recognition that the destruction of the planet has occurred by way of racial violence, slavery and annihilation. Rather than saving the world, recognizing the Trumpocene demands that we think about destroying the barbarism that has marked the earth.

A4. UNRWA, IMPACT OF THE FIRST PHASE OF THE SECURITY BARRIER ON THE QALQILYA, TULKARM, AND JENIN DISTRICTS, GAZA CITY, JULY 2003 (EXCERPTS).

2003 ◽  
Vol 33 (1) ◽  
pp. 153-160
Keyword(s):  
Civil Engineering ◽  
West Bank ◽  
The West ◽  
Full Report ◽  
The World ◽  
Aid Coordination ◽  
President Bush ◽  
Engineering Projects ◽  
The U.S

The separation wall, one of the largest civil engineering projects in Israel's history, has been criticized even by the U.S. administration, with Condoleezza Rice stating at the end of June 2003 that it ““arouses our [U.S.] deep concern”” and President Bush on 25 July calling it ““a problem”” and noting that ““it is very difficult to develop confidence between the Palestinians and Israel with a wall snaking through the West Bank.”” A number of reports have already been issued concerning the wall, including reports by B'Tselem (available at www.btselem.org), the UN Office for the Coordination of Humanitarian Affairs (available at www.palestinianaid.info), and the World Bank's Local Aid Coordination Committee (LACC; also available at www.palestinianaid.info). UNRWA's report focuses on the segment of the wall already completed and is based on field visits to the areas affected by the barriers, with a special emphasis on localities with registered refugees. Notes have been omitted due to space constraints. The full report is available online at www.un.org/unrwa.

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