Regional strain release characteristics for Indian regions

1966 ◽  
Vol 56 (3) ◽  
pp. 749-754
Author(s):  
R. K. S. Chouhan

abstract The strain accumulation and release curves for shallow and deep focus earthquakes of Indian origin have been constructed for a span of sixty years, from 1905 to 1964. For shallow focus earthquakes, magnitudes 7.2 and above have been considered; for deep focus shocks, magnitudes 6.7 and above are used. Strain rebound characteristics yield a number of very interesting features; for example, the curve for shallow focus earthquakes shows two linear segments of strain accumulation. Deep focus shocks show a single cycle of strain accumulation. Comparison of these curves with similar curves from other regions given by Benioff are made.

2018 ◽  
Vol 22 (2) ◽  
pp. 168-183
Author(s):  
Timotheus Vermeulen

In this essay I consider the device of depthlessness in film. I am interested in particular in the ways in which this device can determine, or at least raise questions about, the nature of the fictional world. Taking my cue from two films from the turn of the century – Gary Ross' 1998 film Pleasantville and Matthieu Kassovitz' 1995 La Haine – as well as, more broadly, arts historical and cultural theoretical debates, where rather more attention has been devoted to the issue of depthlessness, I focus on moments in which depth, that is, in Andre Bazin's oft-cited words, the “continuity” of the fictional realm, is flattened so as to trace the correlation between depthlessness and the ontology of the fictional world. The two strategies I look at are shallow focus and the dolly zoom. What I intend, here, is to offer some first, superficial (no pun intended), reflections that may allow us to begin thinking about this cinematic notion of the depthless as a device and concept in its own right, with its own rationales and implications, just as art historians and cultural theorists have found it an interesting concept by which to study and categorize artistic and cultural developments. There is so much discussion in film studies about depth – from Bazin's discourse about neorealism's “decisive step forward” re-introducing deep focus, to Gilles Deleuze's talk about Orson Welles' “freeing” of depth, it might be helpful to consider its supposedly backwards, “restrictive” antithesis as well.


1970 ◽  
Vol 60 (2) ◽  
pp. 393-446 ◽  
Author(s):  
J. F. Evernden

abstract This paper constitutes a compilation of seismicity data available in the literature plus regional and worldwide data obtained from the USCGS Preliminary Determination of Epicenter (PDE) lists. Data are presented in the form of the recurrence relationship of log N versus magnitude, where N is either cumulative or incremental number of earthquakes, and magnitude is either mb or MS. Relative shapes of these recurrence curves as regards mb versus MS, large magnitude versus small magnitude, shallow focus versus deep focus, etc. are discussed. Conclusions on variability of seismicity with time and on worldwide level of seismic activity are included.


2016 ◽  
Vol 47 (3) ◽  
pp. 1316 ◽  
Author(s):  
A. D. Tsampas ◽  
E. M. Scordilis ◽  
C. B. Papazachos ◽  
G. F. Karakaisis

An essential step in the compilation of homogeneous and complete earthquake catalogs is the thorough investigation of potentially robust relations between different magnitude scales. The vast majority of already published relations usually concerns shallow-focus earthquake data with depths up to 60-70 km. In the present study, several magnitude scales reported by 66 world-wide data providers in conjunction with published catalogs are examined within the depth range of 61-700 km, by applying least-squares regression analysis. Among other widely used scales, as body wave (mb, mB) and surface wave (Ms) magnitudes cited by International Centers (i.e. ISC, NEIC and IDC), the behavior of relevant magnitude scales determined by MOS (Moscow, Russia), BJI (Beijing, China), DJA (Djakarta, Indonesia) and the Japanese magnitude calculated by JMA, is also examined. By this way, robust calibrating relationships of 12 magnitude scales to the moment magnitudes provided by GCMT, NEIC and JMA are defined. From the obtained results important observations on the behavior of certain magnitude scales were made. Thus, a remarkable variation of mb scale cited by IDC could be noted for intermediate and deep focus events. Furthermore, a comparison with the Mw of NIED revealed an apparent lower “saturation” level around 5.0 below which the moment magnitude values published by GCMT and NEIC, are systematically overestimated.


1966 ◽  
Vol 56 (2) ◽  
pp. 577-592
Author(s):  
J. C. Savage

abstract The Knopoff-deHoop representation theorem has been used to calculate the form of the body waves radiated from an elliptical fault. Rupture is assumed to initiate at one focus of the ellipse and then spread out radially on the fault plane. Two cases are considered: 1) constant slip everywhere on the fault surface and 2) a variable slip which approaches zero at the fault edge. The radiation is calculated for distances from the fault which are large compared to the fault dimensions. The body waves are described by the product of two factors, one of which is the familiar equivalent-force system radiation pattern. The other factor includes the time dependence of the signal; it does not depend upon the direction of slip. The body waves exhibit two stopping phases. The theory is used to estimate the fault dimensions associated with six deep-focus earthquakes studied by Kasahara. The estimated fault dimensions are about twice the dimensions of the focal sphere as found by Kasahara. Finally, the difference between the phase spectrums of shallow and deep-focus earthquake radiation observed by Kishimoto is shown to be related to a difference in shape of the two fault surfaces; shallow-focus earthquakes appear to be associated with elongated fault surfaces, whereas deep-focus earthquakes are associated with more circular fault surfaces.


2012 ◽  
Vol 2 (11) ◽  
pp. 203-205
Author(s):  
S. Ali Ahmed S. Ali Ahmed ◽  
◽  
Syed Jahangir Badashah ◽  
A. Farooq Hussain

2020 ◽  
Vol 11 (01) ◽  
Author(s):  
Saranya Banerjee ◽  
Deepshikha Ray

Twin studies have mostly focused on the pattern of maladaptive behaviour manifested by the twins and their biological basis but the findings have remained controversial till date. The present case study explores the psychopathology in 14 year old twins of Indian origin. They were referred for psychometric assessment and psychotherapy for their conduct problems. The tools administered on them during psychometric assessment are Wechsler Intelligence Scale for Children IV (WISC-IV), Rorschach Inkblot Test (RIBT) and Thematic Apperception Test (TAT). Findings are discussed in terms of the personality processes and relationship quality of the twins.


1973 ◽  
Vol 1 (2) ◽  
pp. 121-137 ◽  
Author(s):  
J. L. McCarty ◽  
T. J. W. Leland

Abstract The results from recent studies of some factors affecting tire braking and cornering performance are presented together with a discussion of the possible application of these results to the design of aircraft braking systems. The first part of the paper is concerned with steady-state braking, that is, results from tests conducted at a constant slip ratio or steering angle or both. The second part deals with cyclic braking tests, both single cycle, where brakes are applied at a constant rate until wheel lockup is achieved, and rapid cycling of the brakes under control of a currently operational antiskid system.


2017 ◽  
Vol 59 (7-8) ◽  
pp. 630-634 ◽  
Author(s):  
Bin Qiang ◽  
Yadong Li ◽  
Ying Gu ◽  
Dossa Didier Boko-haya

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