scholarly journals Statistical Assessment of In-Plane Masonry Panels Using Limit Analysis with Sliding Mechanism

2022 ◽  
Vol 148 (2) ◽  
Author(s):  
Alejandro Jiménez Rios ◽  
Marco Pingaro ◽  
Emanuele Reccia ◽  
Patrizia Trovalusci
Author(s):  
H. Mohri

In 1959, Afzelius observed the presence of two rows of arms projecting from each outer doublet microtubule of the so-called 9 + 2 pattern of cilia and flagella, and suggested a possibility that the outer doublet microtubules slide with respect to each other with the aid of these arms during ciliary and flagellar movement. The identification of the arms as an ATPase, dynein, by Gibbons (1963)strengthened this hypothesis, since the ATPase-bearing heads of myosin molecules projecting from the thick filaments pull the thin filaments by cross-bridge formation during muscle contraction. The first experimental evidence for the sliding mechanism in cilia and flagella was obtained by examining the tip patterns of molluscan gill cilia by Satir (1965) who observed constant length of the microtubules during ciliary bending. Further evidence for the sliding-tubule mechanism was given by Summers and Gibbons (1971), using trypsin-treated axonemal fragments of sea urchin spermatozoa. Upon the addition of ATP, the outer doublets telescoped out from these fragments and the total length reached up to seven or more times that of the original fragment. Thus, the arms on a certain doublet microtubule can walk along the adjacent doublet when the doublet microtubules are disconnected by digestion of the interdoublet links which connect them with each other, or the radial spokes which connect them with the central pair-central sheath complex as illustrated in Fig. 1. On the basis of these pioneer works, the sliding-tubule mechanism has been established as one of the basic mechanisms for ciliary and flagellar movement.


2012 ◽  
Vol 18 (11) ◽  
pp. 1311-1318
Author(s):  
Hosoon Choi ◽  
Sung-Gul Hong ◽  
Young Hak Lee ◽  
Heecheul Kim ◽  
Dae-Jin Kim

2004 ◽  
Vol 10 (1) ◽  
pp. 219-236 ◽  
Author(s):  
Lilli Engle ◽  
John Engle

The complexity of international education is such that it is far from easy to move towards significant, objectively measurable, and comparable outcomes. What follows is the preliminary examination of one attempt to generate and interpret meaningful statistical assessment of the study abroad experience, within the context of specifically defined study abroad program types. We will examine the data thus far generated, suggest its limitations, and appeal for a continued gathering of information. We will suggest a structured, coordinated, profession-wide assessment effort that will, we hope, gradually reveal a useful correlation between study abroad learning and the input of program variables such as duration, housing, experiential work and on-site mentoring. If, as a profession, study abroad is to invest in outcomes assessment, it would be sensible for such efforts to utilize profession-wide definitions and standards.


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