Wachi Dam and Folsom Dam

2017 ◽  
pp. 521-564
Keyword(s):  
Exploratory Study ◽  
The Self ◽  
Instability Mechanism ◽  
Mode Instability ◽  
Coupled Mode ◽  
Instability Theory ◽  
American River ◽  
Theoretical Predictions

The failures at the Wachi Dam on the Yura River in Japan on July 2, 1967 and at the Folsom Dam on the American River near Sacramento, on July 17, 1995 are analyzed in light of the development of the self-excited coupled-mode instability mechanism. In both failures vibration of the gate was either suspected or noted by eyewitnesses. An exploratory study of how the predictions from the theory of the self-excited coupled-mode instability mechanism fit with the limited known facts is undertaken. The theoretical predictions from self-excited coupled-mode instability theory are found to explain well these two failures and are consistent with the reported circumstances surrounding the failures.

Design and Validation of the Brief Self Online Scale (SO-8) in Early Adolescence: An Exploratory Study

2020 ◽  
pp. 027243162097853
Author(s):  
J. Ortega-Barón ◽  
J. M. Machimbarrena ◽  
I. Montiel ◽  
S. Buelga ◽  
A. Basterra-González ◽  
...  
Keyword(s):  
Factor Analysis ◽  
Exploratory Study ◽  
Convergent Validity ◽  
The Self ◽  
Self Concept ◽  
Problematic Internet Use ◽  
The Internet ◽  
Confirmatory Factor ◽  
Correlated Factors ◽  
Age Range

For the Z-Generation, the Internet has become a very important experimentation laboratory for the discovery and validation of their identity. Despite the importance of the process of building the self in the adolescent, there are hardly any validated instruments that measure the self online. The aim of this research was to design and validate the Brief Self Online Scale (SO-8). A total of 843 students (384 boys, 45.6%), with an age range of 10 to 14 years participated. Confirmatory factor analysis (CFA) confirmed the hypothesized model of two correlated factors (Online Self-Perception and Online Idealized Projection), previously obtained through exploratory factor analysis (EFA). The reliability coefficients of Self Online dimensions were adequate. Indicators of convergent validity were obtained, finding significant correlations with self-concept, problematic Internet use, and online emotional intelligence. The SO-8 has adequate psychometric properties to be considered a reliable and valid tool to measure the construct of the Self Online in adolescents.

Psychographic segmentation of the self-employed: An exploratory study

2010 ◽  
Vol 13 (2) ◽  
pp. 47-56 ◽  
Author(s):  
Matthew G. Kenney ◽  
Art Weinstein
Keyword(s):  
Small Business ◽  
Personality Traits ◽  
Exploratory Study ◽  
Nominal Group Technique ◽  
The Self ◽  
Nominal Group ◽  
Academic Literature ◽  
Self Employment ◽  
Group Technique

Although it is well established in the academic literature that entrepreneurs share common traits, there has been limited research dedicated to evaluating psychographic profiles of the self-employed. Using the Nominal Group Technique, the authors gleaned insight from a panel of experts in an effort to segment the self-employed based on personality traits and the benefits they receive from an entrepreneurial career. The findings show that self-employed individuals can be classified into four distinct segments: Exemplars, Generals, Moms and Dads, and Altruists. Each group derives different benefits from self-employment. Understanding these benefits can greatly assist entrepreneurship educators and marketers of small business oriented products and services.

scholarly journals Halitosis Self-Perception and Awareness among Periodontal Patients—An Exploratory Study

2021 ◽  
Vol 5 (1) ◽  
pp. 9
Author(s):  
Catarina Izidoro ◽  
João Botelho ◽  
Vanessa Machado ◽  
Luis Proença ◽  
Ricardo Alves ◽  
...  
Keyword(s):  
Exploratory Study ◽  
The Self ◽  
Self Perception ◽  
Oral Malodor ◽  
Social Lives ◽  
Self Confidence

Halitosis is an unpleasant breath odor that interferes with self-confidence and with people’s professional and social lives. The aim of this exploratory study was to evaluate the self-perception and awareness of oral malodor among patients with periodontitis.

scholarly journals Use of Team-Based Learning Pedagogy to Prepare for a Pharmacy School Accreditation Self-Study

Pharmacy ◽  
2021 ◽  
Vol 9 (3) ◽  
pp. 148
Author(s):  
Ruth Vinall ◽  
Ashim Malhotra ◽  
Jose Puglisi
Keyword(s):  
Subgroup Analysis ◽  
Exploratory Study ◽  
Likert Scale ◽  
The Self ◽  
Classroom Setting ◽  
Participant Engagement ◽  
Significant Difference ◽  
Self Study ◽  
Team Based Learning ◽  
School Accreditation

Ensuring adequate engagement and preparation of all stakeholders in an accreditation self-study can be challenging for many reasons, including lack of motivation and inadequate understanding of expectations and procedures. The goal of this exploratory study was to determine whether using team-based learning (TBL) pedagogy to deliver an accreditation preparation workshop could effectively prepare and engage participants. A Likert-scale questionnaire was administered to workshop attendees (n = 52) to determine whether they found TBL-based training helpful and whether it promoted engagement. Twenty-four attendees completed the survey (46%). More than 80% of participants strongly agreed or agreed with 12 statements relating to perceptions of self and participant engagement within team activities and the usefulness of team activities. More than 65% of participants strongly agreed or agreed with statements relating to the helpfulness of the TBL approach in preparing for the self-study (five questions). Subgroup analysis showed no significant difference in responses based on whether on not participants had previously been involved in an accreditation self study. Our data indicate that a TBL approach can be an effective way to engage and prepare stakeholders for an accreditation self-study, and that TBL pedagogy has utility outside of the classroom setting.

scholarly journals Identity and Participation Among the New Saudis

2021 ◽  
Vol 22 (2) ◽  
pp. 1-9
Author(s):  
Mongi Zidi ◽  
Turki Al-Shalaki ◽  
Talal Alsaif ◽  
Saeed Al-Dossary ◽  
Desouki Hamed ◽  
...  
Keyword(s):  
Exploratory Study ◽  
Female Students ◽  
The Self ◽  
The West ◽  
National Belonging ◽  
Male And Female ◽  
Social Transformations ◽  
The University ◽  
Academic Year ◽  
Low Rate

An exploratory study was conducted examining the problem of identity and participation among Saudi youth in light of social transformations. The project combined the quantitative and the qualitative curricula and relied on a field study using an electronic questionnaire with a sample of 1318 male and female students from the University of Hail and the participation of 120 students in focus groups during the beginning of the 2020/2021 academic year. The research was based on a number of international and local studies and surveys, and its conclusions were compared with their outcomes. The study outlined a set of indicators that showed the growing expression of the national belonging of the Saudi state in the context of an Arab–Islamic civilisation, a moderate view of the West, a balanced vision of reconciling conservatism with a move towards more openness, and a sense of confidence in the state and in the self. The research also found that the low rate of social participation is matched by a full awareness of its importance and a desire to practise it. The study recommended strengthening the gains of young people and developing areas of participation in proportion to the aspirations of those individuals.

Theory of Self-Excited Coupled-Mode Vibration of Tainter Gates

2017 ◽  
pp. 463-497
Keyword(s):  
Flow Rate ◽  
Graphical Representation ◽  
Nodal Line ◽  
The Self ◽  
Rate Variation ◽  
Body Rotation ◽  
Coupled Mode ◽  
Bending Mode ◽  
Mode Vibration ◽  
Vibration Mechanism

In general, any mechanism that produces an unbalanced moment may also serve to initiate a rigid body rotation of a Tainter gate about the trunnion pin. From the modal analysis testing on an intact Folsom Dam Tainter gate, and an understanding of the concepts of flow-rate variation pressure and push-and-draw pressure presented in Chapters 4 and 5, respectively, a conceptual model of the vibration mechanism can be formulated. The whole gate rotation induces a flow-rate variation pressure and a coupled inertia torque on the skinplate, as presented in Chapter 4. Both the flow-rate-variation pressure and the inertia torque excite the skinplate to rotate in a bending mode shape about a horizontal nodal line. In the present chapter we will develop the theory behind such an instability mechanism, called the self-excited coupled-mode instability, culminating in the graphical representation of the Folsom Dam gate instability in terms of a dynamic stability criterion diagram under the conditions at which failure occurred.

Projecting the self in aging: an exploratory study of self-defining future projections

Memory ◽  
2020 ◽  
Vol 28 (5) ◽  
pp. 632-641
Author(s):  
Stéphane Raffard ◽  
Catherine Bortolon ◽  
Fanny Iniesta ◽  
Valérie Macioce ◽  
Marie-Christine Gely-Nargeot ◽  
...  
Keyword(s):  
Exploratory Study ◽  
The Self ◽  
Future Projections

scholarly journals Glimpses of semantic restructuring of English emotion-laden words of American English L1 users residing outside the USA

2017 ◽  
Vol 8 (3) ◽  
pp. 320-342 ◽  
Author(s):  
Jean-Marc Dewaele
Keyword(s):  
Exploratory Study ◽  
American English ◽  
Statistical Analyses ◽  
The Self ◽  
Semantic Representations ◽  
Frequency Of Use ◽  
Dependent Variables ◽  
The Usa ◽  
English Speaking ◽  
The Uk

Abstract The present exploratory study focuses on the effect of living outside the USA on the understanding of the meaning, the perceived offensiveness and the self-reported frequency of use of four English emotion-laden words of British origin and four English emotion-laden words of American origin among 556 first (L1) users of American English. Statistical analyses revealed that the scores of the Americans living in the UK or in non-English-speaking countries differed significantly from those of compatriots living in the USA. Positive relationships emerged between multilingualism and scores on the dependent variables for the four British words, but no link emerged between languages known and the dependent variables for the American words. This is interpreted as an indication that semantic representations of emotion-laden words originating from another variety of the L1 are relatively weaker and are more likely to shift as a result of exposure to their use in other varieties, and the knowledge of other languages.

Interfacial wave theory for oscillatory finger formation in a Hele–Shaw cell: a comparison with experiments

1996 ◽  
Vol 7 (2) ◽  
pp. 169-199 ◽  
Author(s):  
Jian-Jun Xu
Keyword(s):  
Wave Theory ◽  
Quantitative Agreement ◽  
Instability Mechanism ◽  
Interfacial Wave ◽  
Wave Instability ◽  
Viscous Fingers ◽  
Theoretical Predictions ◽  
Finger Tip ◽  
Hele Shaw Cell ◽  
Comparison With Experiments

This paper is devoted to an analysis of the formation of oscillatory viscous fingers in a Hele-Shaw cell on the basis of the interfacial wave theory, previously established for the pattern formation dynamics in dendrite growth, as well as in the classic Saffman–Taylor flow. In particular, we study the problem of selection and persistence of oscillatory fingers with a tiny bubble at the finger tip. We obtain uniformly valid asymptotic solutions for this problem, and derive the linear, global wave instability mechanism for this more complicated system. The global, neutrally stable modes are computed in a large region of parameters, which select the form of oscillatory fingers in the later stage of evolution. We have compared the theoretical predictions with the experimental data by Couder et al. (1986) and by Kopf-Sill & Homsy (1987), and found excellent quantitative agreement.

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