scholarly journals SLED SYSTEM FOR PROFILING SUSPENDED LITTORAL DRIFT

1978 ◽  
Vol 1 (16) ◽  
pp. 106 ◽  
Author(s):  
J.P. Coakley ◽  
H.A. Savile ◽  
M. Pedrosa ◽  
M. Larocque
Keyword(s):  
Great Lakes ◽  
Surf Zone ◽  
Research Literature ◽  
Littoral Drift ◽  
Virtual Absence ◽  
Fast Ice ◽  
Steep Waves ◽  
Sled System ◽  
Coastal Research

There are many factors which suggest that littoral zone processes in the Great Lakes differ substantially from those of the marine coasts described in the existing coastal research literature. Among these factors are the lack of an appreciable tidal cycle; the predominance of relatively short, steep, waves; the virtual absence of swell waves; and the presence of shore fast ice in winter. As a result, many of the empirical relationships derived for marine coasts might be of questionable applicability to Great Lakes coasts. The present study, which represents only one phase of a long-term project designed to develop more specific littoral transport relationships, is aimed at obtaining accurate, direct estimates of the actual littoral transport at an experimental site located at the western end of Lake Ontario. This paper will describe a mechanical system designed to collect a series of time-averaged samples of suspended sediment for concentration determinations as well as flow velocity and water depth at locations across the surf zone. Some preliminary results of the field program using the system will also be presented and discussed.

Sled System for Profiling Suspended Littoral Drift

1978 ◽  
Author(s):  
J. P. Coakley ◽  
H. A. Savile ◽  
M. Pedrosa ◽  
M. Larocque
Keyword(s):  
Littoral Drift ◽  
Sled System

Long-term primary production trends in the Laurentian Great Lakes: a comparison of geochemical methods

2021 ◽  
Author(s):  
Euan D. Reavie ◽  
Meijun Cai ◽  
Carsten Meyer-Jacob ◽  
John P. Smol ◽  
Josef P. Werne
Keyword(s):  
Primary Production ◽  
Great Lakes ◽  
Laurentian Great Lakes

scholarly journals Emergence and Migration of a Nearshore Bar: Sediment Flux and Morphological Change on a Multi-Barred Beach in the Great Lakes

2007 ◽  
Vol 60 (1) ◽  
pp. 31-47 ◽  
Author(s):  
Brian Greenwood ◽  
Allana Permanand-Schwartz ◽  
Christopher A. Houser
Keyword(s):  
Great Lakes ◽  
Suspended Sediment ◽  
Surf Zone ◽  
Sandy Beaches ◽  
Sediment Flux ◽  
Accommodation Space ◽  
Longshore Transport ◽  
Sediment Balance ◽  
And Migration ◽  
Equilibrium Morphology

Abstract Burley Beach (southeastern Lake Huron) exhibits a multi-barred shoreface, the long-term equilibrium morphology characteristic of many low angle, sandy beaches in the Canadian Great Lakes. During a single major storm, a new bar emerged 50-60 m offshore as an irregular trough-crest form, through differential erosion of an existing shore terrace. Emergence, bar growth and offshore migration were associated with: (a) an overall negative sediment balance in the inner surf zone initially (‑2.30 m3>/m beach width), but with a large positive sediment balance (+5.10 m3/m) subsequent to the storm peak and during the storm decay; (b) progradation of the beach step to produce a new shore terrace; and (c) offshore migration of the two outer bars to provide the accommodation space necessary for the new bar. The primary transport mechanisms accounting for emergence of the new bar, its growth and migration were: (a) the mean cross-shore currents (undertow), which always transported suspended sediment offshore; and (b) the onshore transport of suspended sediment by incident gravity wave frequencies early in the storm and subsequently by infragravity waves (at the storm peak and the decay period). The longshore transport of sediment was significant in terms of the gross transport, although the net result was only a small transport to the south-west (historic littoral transport direction). It did not cause bar initiation, but it may have supplied some of the sediment for bar growth. The primary mechanism for bar initiation and growth was the cross-shore displacement of sediment by wave-driven (oscillatory) transport and cross-shore mean currents (undertow).

scholarly journals Dignity in long-term care

2016 ◽  
Vol 24 (6) ◽  
pp. 744-751 ◽  
Author(s):  
Jennifer Kane ◽  
Kay de Vries
Keyword(s):  
Long Term Care ◽  
Aged Care ◽  
Research Literature ◽  
Ethical Considerations ◽  
Term Care ◽  
Care Environment ◽  
The United Kingdom ◽  
Care Facilities ◽  
Common Thread

Background: The concept of dignity is recognised as a fundamental right in many countries. It is embedded into law, human rights legislation and is often visible in organisations’ philosophy of care, particularly in aged care. Yet, many authors describe difficulties in defining dignity and how it can be preserved for people living in long term care. Objectives: In this article, Nordenfelt’s ‘four notions of dignity’ are considered, drawing on research literature addressing the different perspectives of those who receive, observe or deliver care in the context of the long-term care environment. Methods: A review of the literature was undertaken using the terms ‘nursing homes’, ‘residential care’ or ‘long-term care’. The terms were combined and the term ‘human dignity’ was added. A total of 29 articles met the inclusion criteria from the United Kingdom (14), United States (2), Australia (1), Sweden (3), Hong Kong (2), Norway (3), Nordic (1), Taiwan (1), Netherlands (1). Ethical Considerations: Every effort has been made to ensure an unbiased search of the literature with the intention of an accurate interpretation of findings. Discussion: The four notions of dignity outlined by Nordenfelt provide a comprehensive description of the concept of dignity which can be linked to the experiences of people living in long-term care today and provide a useful means of contextualising the experiences of older people, their families and significant others and also of staff in long-term care facilities. Of particular interest are the similarities of perspectives of dignity between these groups. The preservation of dignity implies that dignity is a quality inherent in us all. This links directly to the exploration and conclusions drawn from the literature review. Conversely, promoting dignity implies that dignity is something that can be influenced by others and external factors. Hence, there are a number of implications for practice. Conclusion: We suggest that two of Nordenfelt’s notions, ‘dignity of identity’ and ‘dignity of Menschenwüde’, are a common thread for residents, family members and staff when conceptualising dignity within long-term care environments.

scholarly journals Identifying Project Corporate Behavioral Risks to Support Long-Term Sustainable Cooperative Partnerships

2021 ◽  
Vol 13 (11) ◽  
pp. 6347
Author(s):  
Marco Nunes ◽  
António Abreu ◽  
Célia Saraiva
Keyword(s):  
Social Network ◽  
Project Management ◽  
Social Network Analysis ◽  
Network Analysis ◽  
Building Blocks ◽  
Research Literature ◽  
Management Tools ◽  
Dynamic Interactions ◽  
Major Factors

Projects are considered crucial building blocks whereby organizations execute and implement their short-, mid-, and long-term strategic visions. Projects are thought, developed, and implemented to solve problems, drive change, satisfy unique needs, add value, and exploit opportunities, just to name a few objectives. Although existing project management tools and techniques aim to deliver projects with success, according to the latest reviewed literature, projects still keep failing at an impressive pace. Among the extensive list of factors that may threaten project success, several articles from the research literature place particular importance on a still underexplored factor that may strongly lead to unsuccessful project delivery. This factor—usually known as corporate behavioral risks—usually emerges and evolves as organizations work together to deliver projects across a bounded period of time, and is characterized by the mix of formal and informal dynamic interactions between the different stakeholders that constitute the different organizations. Furthermore, several articles from the research literature also point out the lack of proper models to efficiently manage corporate behavioral risks as one of the major factors that may lead to projects failing. To efficiently identify and measure how such corporate behaviors may contribute to a project’s outcomes (success or failure), a heuristic model is proposed in this work, developed based on four fundamental fields ((1) project management, (2) risk management, (3) corporate behavior, and (4) social network analysis), to quantitatively analyze four critical project social networks ((1) communication, (2) problem-solving, (3) advice, and (4) trust), by applying the theory of social network analysis (SNA). The proposed model in this work is supported with a case study to illustrate its implementation and application across a project lifecycle, and how organizations can benefit from its application.

scholarly journals A Long-Term Fine-Resolution Record of AVHRR Surface Temperatures for the Laurentian Great Lakes

2018 ◽  
Vol 10 (8) ◽  
pp. 1210
Author(s):  
Charles White ◽  
Andrew Heidinger ◽  
Steven Ackerman ◽  
Peter McIntyre
Keyword(s):  
Great Lakes ◽  
Morphological Characteristics ◽  
Laurentian Great Lakes ◽  
Environmental Research ◽  
Weighted Interpolation ◽  
Large Lakes ◽  
Fine Resolution ◽  
Observation Times ◽  
The Impact

Inland waters are warming at highly variable rates that often differ from regional air temperature trends. This variable warming is partially attributable to an individual lake’s geographical and morphological characteristics. In very large lakes, significant intralake variability in long-term warming trends has also been observed. In light of this intralake and interlake heterogeneity of lake surface water temperature (LSWT) and LSWT trends, we revisit the 1.1 km Advanced Very High Resolution Radiometer (AVHRR) record for the Laurentian Great Lakes. In this work, we have assembled a long-term (1986–2016) and high-spatial-resolution (0.018°) daily LSWT dataset using AVHRR record. Subtracting an empirically-determined mean diurnal cycle mitigates the effects of varying observation times. Adjustments in the georegistration of the images are made to reduce the impact of AVHRR navigational errors on the earlier platforms. Both the original daily composites, and a gap-filled product using locally weighted interpolation methods will be made available to support fine-scale physical and environmental research in the region.

Seeking Participatory Equity Through Ethnographic Inquiry

2001 ◽  
Vol 23 (3) ◽  
pp. 17-22 ◽  
Author(s):  
John Stone
Keyword(s):  
Environmental Management ◽  
Great Lakes ◽  
Lessons Learned ◽  
Public Consultation ◽  
Ann Arbor ◽  
Long Term Consequences

This article describes my EPA/SfAA Fellowship experience with the Great Lakes Commission (GLC) in Ann Arbor, Michigan, conducted between August 1999 and October 2000. It generally follows the format of Robert Wulff's and Shirley Fiske's Anthropological Praxis: Translating Knowledge into Action (Boulder CO: Westview. 1987), with major sections devoted to "Client and Problem," "Process and Players," "Results and Evaluation," and "The Anthropological Difference." The article concludes by summarizing the lessons learned through the fellowship and its potential long-term consequences for public consultation in Great Lakes environmental management. I gratefully acknowledge support provided by my fellowship host, sponsors, and supervisors; however, the positions I take in this article are mine alone and do not necessarily reflect their opinions.

scholarly journals LONG TERM MORPHOLOGICAL MODELLING

2011 ◽  
Vol 1 (32) ◽  
pp. 64
Author(s):  
Sten Esbjørn Kristensen ◽  
Rolf Deigaard ◽  
Martin Anders Taaning ◽  
Jørgen Fredsøe ◽  
Nils Drønen ◽  
...  
Keyword(s):  
Time Scale ◽  
Surf Zone ◽  
Coastal Structures ◽  
Model Concept ◽  
General Applicability ◽  
Shoreline Evolution ◽  
Realistic Representation ◽  
Morphological Modelling ◽  
Constant Shape

A morphological modelling concept for long term nearshore morphology is proposed and examples of its application are presented and discussed. The model concept combines parameterised representations of the cross-shore morphology, with a 2DH area model for waves, currents and sediment transport in the surf zone. Two parameterization schemes are tested for two different morphological phenomena: 1) Shoreline changes due to the presence of coastal structures and 2) alongshore migration of a nearshore nourishment and a bar by-passing a harbour. In the case of the shoreline evolution calculations, a concept often used in one-line modelling of cross-shore shifting of an otherwise constant shape cross-shore profile is applied for the case of a groyne and a detached breakwater. In the case of alongshore bar/nourishment migration an alternative parameterization is adopted. All examples are presented, analysed and discussed with respect to the question of realistic representation, time scale and general applicability of the model concept.

Developments in Cyclic Analysis and High Temperature Design

2005 ◽  
Author(s):  
Peter Carter ◽  
Douglas L. Marriott
Keyword(s):  
High Temperature ◽  
Power Systems ◽  
Creep Damage ◽  
Limit Load ◽  
Cyclic Stress ◽  
Research Literature ◽  
Stress Classification ◽  
Analysis Technique ◽  
Recent Developments

Design for cyclic loading is emerging as a key question for next generation power systems. Recent developments in techniques for cyclic stress analysis have significant implications for high temperature design. In the same way that limit load analysis is now being used to overcome the difficulties and guesswork of stress classification for steady primary loads, so shakedown and ratcheting analysis can eliminate the more difficult problems of stress classification for cyclic loads. The paper shows how reference stresses defined for shakedown and ratcheting provide rapid and conservative information for design against rupture and creep damage, deformation and strain accumulation, and ratcheting. These techniques will provide additional insights to designers and are likely to augment rather than replace, existing options. These ideas have existed in the research literature for some time, but have now become more accessible by the general industry with a new analysis technique in a commercial finite element code. Examples are given which demonstrate the methodology for nozzles having non-thermal secondary stresses, and prediction of long-term distortion in thermal shock problems.

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