scholarly journals INTER-RELATIONS BETWEEN JET BEHAVIOR AND HYDRAULIC PROCESSES OBSERVED AT DELTAIC RIVER MOUTHS AND TIDAL INLETS

2000 ◽  
Vol 1 (3) ◽  
pp. 12
Author(s):  
Charles G. Bates ◽  
John C. Freeman, Jr.
Keyword(s):  
Quantitative Measurement ◽  
Theoretical Development ◽  
Tidal Inlets ◽  
Theoretical Concepts ◽  
Water Flows ◽  
Comprehensive Theory ◽  
Delta Formation ◽  
Jet Behavior ◽  
River Mouths ◽  
Hydraulic Processes

Price (1951) has stated: "(in) geological oceanography as practiced today there is constant emphasis on quantitative measurement and quantitative theoretical development." As a demonstration of this geophysical approach to geological problems the authors have studied the theory of processes involved when sediment-laden water flows into a currentless, tideless, wave-free basin. The theoretical concepts developed have then been tested against the actual occurrences in nature. The result is that it is possible to propose a comprehensive theory of delta formation which may explain many of the features observed near mouths of rivers. According to this theory, there are three distinct and basic types of river inflow into a still basin, as shown in Figure 1:

scholarly journals Using Systems Thinking to Improve Tourism and Hospitality Research Quality and Relevance: A Critical Review and Conceptual Analysis

2021 ◽  
Vol 2 (1) ◽  
pp. 153-172
Author(s):  
Gianna Moscardo
Keyword(s):  
Systems Thinking ◽  
Critical Review ◽  
Systems Approach ◽  
Problem Area ◽  
Theoretical Development ◽  
Research Quality ◽  
Theoretical Understanding ◽  
Theoretical Concepts ◽  
Tourism And Hospitality ◽  
Published Research

This paper argues that that much published tourism and hospitality research has had little influence on tourism or hospitality practice especially with regard to the problems of sustainability because of a failure to use systems thinking to guide research questions and approaches. This critical review and conceptual paper demonstrates how a systems thinking approach could be used to improve both the relevance of, and theoretical development in, tourism and hospitality research in the area of sustainability. This paper reviewed recent published research into tourism’s social impacts to demonstrate the power of taking a systems approach to map out the research problem area. It then critically reviewed the use of concepts from psychology in published research into guest engagement in sustainability programs in hospitality businesses to demonstrate the value of systems thinking for organising theoretical concepts. In both of the reviewed areas the overwhelming conclusion was that the majority of the research lacked both practical relevance and was based on inappropriate or deficient theoretical understanding.

The status of variable rules in sociolinguistic theory1

1981 ◽  
Vol 17 (1) ◽  
pp. 93-119 ◽  
Author(s):  
Suzanne Romaine
Keyword(s):  
Linguistic Analysis ◽  
Philosophical Analysis ◽  
Human Language ◽  
Theoretical Concepts ◽  
Comprehensive Theory ◽  
The Status ◽  
The Universe

INTRODUCTION In a recent paper, Botha (1976) suggests that the analysis of linguistic argumentation is a ‘non-normal’ thing for linguists to do. ‘Normally’, he maintains, ‘linguists are oriented towards uncovering the nature of human language, and not the nature of linguistic science.’ Botha (1976: 3) even goes so far as to claim that the analysis of a form of argumentation is not a sort of linguistic analysis; it is instead a form of philosophical analysis. Some philosophers would probably disagree here with Botha and say that philosophical analysis is a sort of linguistic analysis. I am thinking here of Wittgenstein, for example, and the so-called philosophers of language who accept the view that the business of philosophy is to deal with the question of how words mean what they mean, etc., rather than to offer a comprehensive theory of the universe. It is difficult to draw a line of demarcation between a discipline proper and the study of the methodological underpinnings of that discipline, which I am not sure is essential anyway. My point is that a certain amount of self-criticism and awareness of the status of theoretical concepts and arguments can do linguists no harm.

Use of Hydrogen Bubbles for Quantitative Determination of Time-Dependent Velocity Fields in Low-Speed Water Flows

1965 ◽  
Vol 87 (2) ◽  
pp. 429-444 ◽  
Author(s):  
F. A. Schraub ◽  
S. J. Kline ◽  
J. Henry ◽  
P. W. Runstadler ◽  
A. Littell
Keyword(s):  
Quantitative Measurement ◽  
Operating Experience ◽  
Visual Observation ◽  
Low Frequencies ◽  
Low Speed ◽  
Water Flows ◽  
Hydrogen Bubbles ◽  
History Of ◽  
Hydrogen Bubble Technique

Improved flow-visualization methods based on the hydrogen-bubble technique are described. Use of “combined-time-streak markers” allows quantitative measurement of the instantaneous velocity field in a plane as a function of time in low-speed water flows. Adaptation to a great variety of situations using different probe techniques is possible. Disturbance to the flow is very small. Adequate accuracy is obtainable. The method offers the advantage of simultaneous visual observation of the flow structure and quantitative measurement of velocity over a finite region. It also allows some types of measurement not previously possible. Limitations of the method include its restriction to low-speed water flows and the observation of fluctuations only at low frequencies. Practical difficulties occur due to probe frangibility and problems of obtaining uniform bubble production. Part 1 describes the underlying concepts, summarizes the history of the method and describes operating experience to date at Educational Services, Incorporated, and Stanford University. Part 2 is a detailed analysis of the uncertainties in velocity measurements using combined-time-streak markers formed by hydrogen bubbles.

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