scholarly journals TRANSPORT PATTERNS IN THE CHAP PHYA ESTUARY

1966 ◽  
Vol 1 (10) ◽  
pp. 36 ◽  
Author(s):  
E. Allersma ◽  
A.J. Hoekstra ◽  
E.W. Bijker
Keyword(s):  
Field Survey ◽  
Small Scale ◽  
Natural Phenomena ◽  
Municipal Water Supply ◽  
Approach Channel ◽  
Wave Heights ◽  
Water Salt ◽  
Transport Patterns ◽  
Hydraulics Laboratory ◽  
Insight Into

Present day's society asks for ever larger engineering works to be carried out in estuaries. The developing techniques of dredging and construction allow for great interventions in the natural phenomena with often far reaching consequences. The whole intricate system of transports of water, salt and sediments may be drastically changed,affecting the existing quasi-static equilibria between sedimentation and erosion. For the planning of such works a thorough knowledge of the estuarme hydrology is indispensable. The port of Bangkok, the mam gateway for traffic into Thailand, is situated in the estuary of the Chao Phya river (figure 1). Increasing navigation demands improvement of the harbour and its 55 km long approach channel but the interests of agriculture and municipal water supply must also be taken into account. The Netherlands Engineering Consultants (NEDECO) m combination with the Delft Hydraulics Laboratory have made a four-years study of the estuary covering a field survey and a hydraulic model test. The observations in nature served to obtain insight into the estuarme transport pattern m relation with the boundary conditions given by the regimen of the river and the state of the sea. The small scale tests gave indications of the changes in these phenomena to be expected from alterations of the situation m the estuary and of the discharge characteristics of the river. The field survey was carried out from 1961 to 1965 with four fully equipped survey vessels to measure current velocities (60,000 times) to take samples of water and sediments, to measure wave heights and for echo-soundings. In a laboratory the samples of water (70,000) and sediments were tested as to silt concentration, salinity and soil-mechanical properties. Together with meteorological, oceanographical and hydrological data from cooperating local authorities a picture was obtained of the phenomena in the estuary and the causes of the siltation m the dredged channel.

scholarly journals Charting the Rough Journey to ‘Home’: The Contribution of Qualitative Longitudinal Research to Understandings of Homelessness in Austerity

2021 ◽  
pp. 1-17
Author(s):  
Emma Davidson ◽  
Briege Nugent ◽  
Sarah Johnsen
Keyword(s):  
Longitudinal Research ◽  
Support Service ◽  
Added Value ◽  
Small Scale ◽  
Deep Insight ◽  
Policy Makers ◽  
Analytical Potential ◽  
Longitudinal Approach ◽  
The Uk ◽  
Insight Into

This article reflects on the contribution of qualitative longitudinal research (QLR) to understandings of homeless peoples’ experiences of support service interventions in an era of austerity in the UK. It brings into ‘analytic conversation’ data from qualitative longitudinal evaluations of homeless support projects operated by voluntary sector organisations in Scotland. With fieldwork spanning 2014-2019, the analysis expands the analytical potential of pooling small-scale studies through an interrogation of individuals’ ‘journeys’ through homelessness services and their rough path to ‘home’. By reflecting on our substantive findings, the article explores the added value and challenges of a longitudinal approach. It concludes that while QLR can deliver deep insight into lives lived by vulnerable populations and potentially reduce the distance between policy makers and those affected, its benefits must be balanced against pragmatism and the ethical responsibilities associated with the method.

Contrasting profiles of product returners and keepers

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Dong Hwan Lee
Keyword(s):  
New York ◽  
Household Income ◽  
Field Survey ◽  
Survey Study ◽  
Content Type ◽  
Demographic Profiles ◽  
Post Purchase ◽  
Practical Implications ◽  
Insight Into ◽  
Study Offer

Purpose This paper aims to investigate whether the consumers who return a product and those who end up keeping a product after experiencing post-purchase dissonance (PPD) possess distinct underlying characteristics. Design/methodology/approach Field survey study consisting of two separate surveys conducted with consumers of New York City and neighboring areas of New York and New Jersey. Findings Product returners and keepers exhibited disparate demographic profiles regarding gender and household income, along with ethnicity to some extent. The two groups also exhibited different predispositions with regard to confidence in the purchase decision and expectations about their purchase. Finally, returners and keepers were engaged in divergent thoughts, feelings and activities to cope with PPD. Practical implications The findings of this study offer marketing practitioners new knowledge and insight into understanding product returners and keepers and will assist them in developing strategies to reduce and manage increasing product returns by consumers more effectively. Originality/value This study is the first to present empirical evidence that product returners and keepers have distinct profiles of demographic characteristics and predispositions toward purchase. The study also has found divergent PPD coping strategies used by the two types of consumers, which exposes an obsolete understanding of PPD in the marketing literature.

scholarly journals WAVE RECORDING ON THE IJSSELMEER

2011 ◽  
Vol 1 (7) ◽  
pp. 3
Author(s):  
P. W. Roest
Keyword(s):  
Average Period ◽  
Recording Time ◽  
Ice Drift ◽  
Recording Station ◽  
Long Time ◽  
Wave Heights ◽  
Wave Research ◽  
The Difference ◽  
Hydraulics Laboratory ◽  
The Waves

The dimensions of the dikes in the Ijsselmeer are mainly determined by wave-attack. The dimensions of the waves as a result of the design gale are calculated with the diagram of the Hydraulics Laboratory at Delft (ref« 1). This diagram is based on data of Sverdrup for deep water and principally on laboratory studies for shallow water. For a long time there has been a need of wave recordings on the lake in order to verify the calculated wave heights. A problem is the impossibility of maintaining a permanent recording station on the lake due to ice-drift in wintertime. Otherwise the Ijsselmeer lends itself admirably to wave-research, because there are vast regions with only small variations in waterdepth. Another advantage is that frequently more or less stationary conditions will occur under the influence of winds of constant force and direction. When Dr. Dorrestein of the Royal Dutch Meteorological Institute introduced his new floating waverecorder, it was possible to take observations in every place of the lake. Soon it appeared that this recorder has many advantages. The equipment consists of an accelerometer mounted on a little raft of one meter each way, that follows the movement of the water surface. The signal of the accelerometer is transmitted by an electric cable to the ship, where it is double integrated and then recorded (ref. 3). During the last winter several observations have been carried out with an instrument of this type* As a result of initial troubles with the electronic equipment the number of observations during gale-conditions has been limited. The usual duration of each recording is about 15 minutes. The average period of the waves lies between three and a half and five seconds, so each diagram consists of 180 to 250 waves. Wave height is measured as the difference in height between a trough and the next crest. The average period is determined by dividing the total recording time by half the number of zerocrossings.

scholarly journals Finding One’s Place in a Host Space: A Small-Scale Study of Cultural Integration and Language Maintenance Among Croatian Immigrants in Canada

2021 ◽  
Vol 12 (1) ◽  
pp. 37-76
Author(s):  
Sanja Škifić ◽  
Antonia Strika
Keyword(s):  
British Columbia ◽  
Language Acquisition ◽  
Language Use ◽  
Language Maintenance ◽  
Small Scale ◽  
Cultural Integration ◽  
The Relationship ◽  
Cognitive Perspectives ◽  
Insight Into

This paper focuses on sociocultural and language-related issues among Croatian immigrants in Canada. It presents the results of thestudy conducted from November 2018 to February 2019 among Croatian immigrants of different generations in Ontario and British Columbia. Questions included in the questionnaire refer to different aspects of participants’ identity and their (families’) immigration, as well as issues related to their attitudes towards the homeland and engagement in Croatian associations in Canada. Participants were asked to provide feedback on their language acquisition, competence and use, as well as evaluations of the importance of the Croatian language for their identity. The questionnaire also contained questions related to participants’ language use from emotional and cognitive perspectives. Conclusions drawn on the basis of the collected data provide an insight into Croatian immigrants’ language use, the extent of cultural integration and language maintenance, and their attitudes towards the relationship between identity and language.

Open Systems Formulation and Gaining Insight Using Lagrangian Bond Graphs

2000 ◽  
Author(s):  
Robin C. Redfield
Keyword(s):  
System Dynamics ◽  
Open Systems ◽  
Classical Method ◽  
System Modeling ◽  
Bond Graph ◽  
Small Scale ◽  
Bond Graphs ◽  
Model Modification ◽  
System Equations ◽  
Insight Into

Abstract Models of a small-scale water rocket are developed as an example of open system modeling by both the bond graph approach and a more classical method. One goal of the development is to determine the benefits of the bond graph approach into affording insight into the system dynamics. Both modeling approaches yield equivalent differential equations as they should, while the bond graph approach yields significantly more insight into the system dynamics. If a modeling goal is to simply find the system equations and predict behavior, the classical approach may be more expeditious. If insight and ease of model modification are desired, the bond graph technique is probably the better choice. But then you have to learn it!

1. What’s so funny ‘bout applied mathematics? Modelling, theory, and methods

2018 ◽  
pp. 1-14
Author(s):  
Alain Goriely
Keyword(s):  
Applied Mathematics ◽  
Scientific Discipline ◽  
Natural Phenomena ◽  
Computational Tools ◽  
Mathematical Ideas ◽  
Systematic Development ◽  
Insight Into

What is applied mathematics and how is it different from mathematics or any other scientific discipline? ‘What’s so funny ‘bout applied mathematics? Modelling, theory, and methods’ argues that applied mathematics includes the modelling of natural phenomena and human endeavours, the study of mathematical ideas originating from these models, and the systematic development of theoretical and computational tools to probe models, handle data, and gain insight into any problem that has been properly quantified. Applied mathematics is best characterized by three intertwined areas: modelling, theory, and methods. Any work in applied mathematics fits in one of these three categories or combines them judiciously.

Drift of Piles Subjected to Cyclic Lateral Loading From a Varying Direction: System vs. Soil Element Behavior

2014 ◽  
Author(s):  
Christina Rudolph ◽  
Jürgen Grabe ◽  
Britta Bienen
Keyword(s):  
Cyclic Loading ◽  
Model Tests ◽  
Small Scale ◽  
Shear Tests ◽  
Centrifuge Testing ◽  
Scale Modeling ◽  
Highly Sensitive ◽  
Number Of Cycles ◽  
Laterally Loaded ◽  
Insight Into

Offshore monopiles are usually designed using the p-y method for cyclic loading. While the method works for static loading, it was not developed for high numbers of cycles. Since the turbines are highly sensitive towards tilting, cyclic loading must be considered. The static results should therefore be combined with results from cyclic model tests with a high number of cycles to account for the accumulation of displacement or rotation during the lifetime of these structures. These model tests can underestimate the accumulation, however, as it has recently been shown that a change of loading direction can increase the accumulation considerably. These results have been verified using small scale modeling and centrifuge testing. The results from modeling the full problem of a laterally loaded pile are compared here with results from cyclic simple shear tests with a change of shearing direction during the cyclic loading. For these tests, a newly developed apparatus is used. This allows further insight into the question how a soil can “retain a memory” of its loading history.

scholarly journals Mean-Field Magnetohydrodynamics as a Basis of Solar Dynamo Theory

1976 ◽  
Vol 71 ◽  
pp. 323-344 ◽  
Author(s):  
K.-H. Rädler
Keyword(s):  
Magnetic Field ◽  
Large Scale ◽  
Mean Field ◽  
Strong Relationship ◽  
Solar Radius ◽  
Small Scale ◽  
Dynamo Theory ◽  
The Magnetic Field ◽  
Complicated Situation ◽  
Insight Into

One of the most striking features of both the magnetic field and the motions observed at the Sun is their highly irregular or random character which indicates the presence of rather complicated magnetohydrodynamic processes. Of great importance in this context is a comprehension of the behaviour of the large scale components of the magnetic field; large scales are understood here as length scales in the order of the solar radius and time scales of a few years. Since there is a strong relationship between these components and the solar 22-years cycle, an insight into the mechanism controlling these components also provides for an insight into the mechanism of the cycle. The large scale components of the magnetic field are determined not only by their interaction with the large scale components of motion. On the contrary, a very important part is played also by an interaction between the large and the small scale components of magnetic field and motion so that a very complicated situation has to be considered.

The failure of non‐binding declarations to achieve university sustainability

2007 ◽  
Vol 8 (3) ◽  
pp. 301-316 ◽  
Author(s):  
S.A. Bekessy ◽  
K. Samson ◽  
R.E. Clarkson
Keyword(s):  
Best Practice ◽  
Small Scale ◽  
Structured Interviews ◽  
Pilot Studies ◽  
Content Type ◽  
Institute Of Technology ◽  
University Leaders ◽  
The University ◽  
The Impact ◽  
Insight Into

PurposeThis paper aims to assess the impact and value of non‐binding agreements or declarations in achieving sustainability in universities.Design/methodology/approachA case study of Royal Melbourne Institute of Technology (RMIT) University is presented, analysing the reasons for lack of progress towards sustainability and evaluating best ways forward. Using a timeline and analysis of historical records for the 12 years since RMIT first engaged in the sustainability agenda, major trends in the process of implementing policies are identified. Secondly, 15 semi‐structured interviews with university leaders and key sustainability stakeholders from across the university are analysed to provide insight into how and why the university has failed to achieve sustainability.FindingsNew implications for successfully achieving sustainability arise from these findings. Accountability is a key issue, as RMIT appears to reap benefits from being signatory to declarations without achieving genuine progress. To ensure that declarations are more than simply greenwash, universities must open themselves up to scrutiny of progress to determine whether commitments have been honoured.Practical implicationsRelying on small‐scale “club” activities establishing demonstrations and raising awareness is unlikely to lead to permanent change. The evidence of RMIT's engagement with sustainability shows that, for example, even when successful pilot studies are conducted, these initiatives may do little to affect the mainstream practices of a university unless certain conditions exist. Furthermore, given the on‐paper commitments institutions have made, and the role of the university in society, small‐scale and gradual changes in university practice are a far from adequate response to the urgent sustainability imperative.Originality/valueThe initial engagement of RMIT University with the sustainability agenda 12 years ago marked it as a world leader in sustainability best‐practice. Analysing how and why such a disappointing lack of action has resulted from such promising beginnings provides insight into future directions for implementing sustainability in universities. The paper argues that considering the key responsibility of universities in leading the sustainability agenda, a more systemic and serious response is required.

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