Piezoelectric thin shell theoretical model and eigenfunction analysis of radially polarized ceramic cylinders

1999 ◽  
Vol 105 (1) ◽  
pp. 154-163 ◽  
Author(s):  
D. D. Ebenezer ◽  
Pushpa Abraham
Keyword(s):  
Theoretical Model ◽  
Thin Shell ◽  
Radially Polarized ◽  
Eigenfunction Analysis

scholarly journals Modeling of infilled thin shell construction built on compressible soil

2019 ◽  
Vol 265 ◽  
pp. 05008
Author(s):  
Nikita Tsimbelman
Keyword(s):  
Theoretical Model ◽  
Numerical Model ◽  
Thin Shell ◽  
Large Diameter ◽  
Shell Structures ◽  
Eccentric Load ◽  
Foundation Soil ◽  
Ice Load ◽  
Inner Surface ◽  
Compressible Soil

This paper presents review of author’s researches of thin cylindrical shells of large diameter filled with soil and used in construction of berths, breakwalls, retaining walls, bridge piers, and etc. The theoretical model for soil stability of the researched structures based on soil boundary state of stress solution with allowance for bond slip is developed. Suggested correlation represents a theoretical model that functionally relates parameters of foundation soil and construction sizes with maximum horizontal force, which might be held by a structure without loss of soil bearing capacity. The numerical model of a thin cylindrical shell with infill under eccentric load is developed. Modeling and experimental determination of the interface strength of the contact surface between the infill and the inner surface of the shell is proposed. The details of testing of physical model used for the experiments are discussed. The effects of the interface friction on the shell behavior and on the foundation stresses are investigated. The influence of parameters affecting the interaction between the soil infill and the inner surface of the shell material is determined. It is based on a comparison of experimental results with calculations performed using the proposed mathematical model. The results of experiment are shown in comparison with calculation data’s for proposed numerical model. Effect of ice load on shell structures with infill on compressible soil is also considered in this research. The numerical model is proposed, which takes into account the interaction between soil environment, effect of ice load and thin shell with infill, to predict the stability and durability of shell structures under ice load.

A Model for Analyzing Suicide Prevention

Crisis ◽  
2000 ◽  
Vol 21 (2) ◽  
pp. 80-89 ◽  
Author(s):  
Maila Upanne
Keyword(s):  
Risk Factors ◽  
Theoretical Model ◽  
Protective Factors ◽  
Suicide Prevention ◽  
Suicide Risk ◽  
Practical Work ◽  
Individual Risk ◽  
Self Assessment ◽  
Prevention Project ◽  
Individual Risk Factors

This study monitored the evolution of psychologists' (n = 31) conceptions of suicide prevention over the 9-year course of the National Suicide Prevention Project in Finland and assessed the feasibility of the theoretical model for analyzing suicide prevention developed in earlier studies [ Upanne, 1999a , b ]. The study was formulated as a retrospective self-assessment where participants compared their earlier descriptions of suicide prevention with their current views. The changes in conceptions were analyzed and interpreted using both the model and the explanations given by the subjects themselves. The analysis proved the model to be a useful framework for revealing the essential features of prevention. The results showed that the freely-formulated ideas on prevention were more comprehensive than those evolved in practical work. Compared to the earlier findings, the conceptions among the group had shifted toward emphasizing a curative approach and the significance of individual risk factors. In particular, greater priority was focused on the acute suicide risk phase as a preventive target. Nonetheless, the overall structure of prevention ideology remained comprehensive and multifactorial, stressing multistage influencing. Promotive aims (protective factors) also remained part of the prevention paradigm. Practical working experiences enhanced the psychologists' sense of the difficulties of suicide prevention as well as their criticism and feeling of powerlessness.

Do self-compassion and self-coldness distinctly relate to distress and well-being? A theoretical model of self-relating.

2018 ◽  
Vol 65 (3) ◽  
pp. 346-357 ◽  
Author(s):  
Rachel E. Brenner ◽  
David L. Vogel ◽  
Daniel G. Lannin ◽  
Kelsey E. Engel ◽  
Andrew J. Seidman ◽  
...  
Keyword(s):  
Theoretical Model ◽  
Well Being ◽  
Self Compassion

Attracting Talent Through "Green" Business Practices: A Theoretical Model

2011 ◽  
Author(s):  
David A. Jones ◽  
Chelsea R. Willness ◽  
Stephan Dilchert
Keyword(s):  
Theoretical Model ◽  
Business Practices ◽  
Green Business
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