Secondary faulting, a consequence of a single continuous bifurcation process

1980 ◽  
Vol 117 (4) ◽  
pp. 373-380 ◽  
Author(s):  
Dov Bahat

SummaryFracture propagation in the crust under post-critical conditions (rapid propagation), and possibly in some instances even under sub-critical conditions (slow propagation) can produce fracture-branching in a single continuous process. Later local or regional stresses result in displacements along the fractures and secondary faulting develops. This concept can explain various secondary features like conditions of branching, branching-angle and shallow secondary faults. The splaying of the Hope Fault in New Zealand is primarily a result of early fracture bifurcation and later minor displacements.

2021 ◽  
Author(s):  
◽  
Peter Kappert

<p>This thesis is concerned with both the direction and the appropriateness of the recently adopted standards-based approach in post-compulsory education and training in New Zealand, while particularly focusing on the implications this might have in formal post-school trades training. It evaluates the developments, the tenets, and the early results of the 'standards' movement within a socio-historical context and against the development of relevant policy formations and legislative changes. The central focus in this work is on the National Qualifications Framework, which is currently being developed under the auspices of the New Zealand Qualifications Authority. This outcomes-focussed model, and related government-initiatives, represent a radial shift away from established learning and teaching practices in New Zealand, a move which is not uncontested for both pedagogical and pragmatical reasons. An analysis of these developments is discussed with reference to those in apprenticeship training and policy in the Federal Republic of Germany, which includes the intention, as expressed by the major role players in the Republic, to develop an educational framework model. The principles, scope, and structure, as they relate to these framework models, are analysed from a comparative perspective, and certain points are highlighted. This thesis contends that despite fundamental divergence in training cultures and systems in the two countries, it is recognised that the common aim of the framework approaches is to improve the correspondence between the world of education and work as well as to enhance the educational pathways for students. This, it is argued, are commendable and valuable aims; not in the least because it has also the potential to bridge the 'vocational/academic' divide - an increasingly invalid division in modern-day societies. This is reflected in a strong focus in these framework models on the promotion, and implementation, of an integrated learning and teaching approach which is supported by the notion introduced by Michael Young that qualifying is a continuous process. This concept is now generally endorsed by the major role players in both Germany and New Zealand as being an important one, in that it is supportive of the macro aim of furthering national economic progress. The author, however, contends that educational, progress cannot simply be assumed because a new educational, or qualifications, framework is being introduced. Its foundation needs to be pedagogically sound and based on sufficient research while an (over)reliance on a single assessment strategy for application to all of post-compulsory education and training cannot be accepted as valid from an educational viewpoint. The thesis concludes with advocacy for more critical research into the NQF.</p>


1959 ◽  
Vol 32 (1) ◽  
pp. 13-20
Author(s):  
Peter Mason

Abstract Cinematographic observations have been made of crack propagation under well-defined boundary conditions in rubbers at speeds up to 30 m/sec. The fracture-markings showed resemblances to those obtained with metals, plastics, and glass, and could be related directly to the corresponding speed of fracture-propagation. In close analogy with Schardin's observations on glass, a non-crystallizing rubber (GR-S) showed a mode of crack propagation in which the fractured surfaces were visually smooth and the speed was about one quarter of the speed of longitudinal elastic waves. A crystallizing rubber (natural rubber) did not show this mode of propagation under the present test conditions. It is suggested that the modes of solid fracture can be usefully classified in three categories: (i) slow propagation, generally with smooth surfaces, obtained by careful control of the boundary conditions; (ii) propagation at intermediate rates with rough surfaces, involving correspondingly greater energy consumption; and (iii) fast propagation with smooth surfaces, the rate of propagation being limited by the speed of elastic waves in the material in accord with Mott's theory.


2021 ◽  
Author(s):  
◽  
Peter Kappert

<p>This thesis is concerned with both the direction and the appropriateness of the recently adopted standards-based approach in post-compulsory education and training in New Zealand, while particularly focusing on the implications this might have in formal post-school trades training. It evaluates the developments, the tenets, and the early results of the 'standards' movement within a socio-historical context and against the development of relevant policy formations and legislative changes. The central focus in this work is on the National Qualifications Framework, which is currently being developed under the auspices of the New Zealand Qualifications Authority. This outcomes-focussed model, and related government-initiatives, represent a radial shift away from established learning and teaching practices in New Zealand, a move which is not uncontested for both pedagogical and pragmatical reasons. An analysis of these developments is discussed with reference to those in apprenticeship training and policy in the Federal Republic of Germany, which includes the intention, as expressed by the major role players in the Republic, to develop an educational framework model. The principles, scope, and structure, as they relate to these framework models, are analysed from a comparative perspective, and certain points are highlighted. This thesis contends that despite fundamental divergence in training cultures and systems in the two countries, it is recognised that the common aim of the framework approaches is to improve the correspondence between the world of education and work as well as to enhance the educational pathways for students. This, it is argued, are commendable and valuable aims; not in the least because it has also the potential to bridge the 'vocational/academic' divide - an increasingly invalid division in modern-day societies. This is reflected in a strong focus in these framework models on the promotion, and implementation, of an integrated learning and teaching approach which is supported by the notion introduced by Michael Young that qualifying is a continuous process. This concept is now generally endorsed by the major role players in both Germany and New Zealand as being an important one, in that it is supportive of the macro aim of furthering national economic progress. The author, however, contends that educational, progress cannot simply be assumed because a new educational, or qualifications, framework is being introduced. Its foundation needs to be pedagogically sound and based on sufficient research while an (over)reliance on a single assessment strategy for application to all of post-compulsory education and training cannot be accepted as valid from an educational viewpoint. The thesis concludes with advocacy for more critical research into the NQF.</p>


1999 ◽  
Vol 190 ◽  
pp. 563-566
Author(s):  
J. D. Pritchard ◽  
W. Tobin ◽  
J. V. Clausen ◽  
E. F. Guinan ◽  
E. L. Fitzpatrick ◽  
...  

Our collaboration involves groups in Denmark, the U.S.A. Spain and of course New Zealand. Combining ground-based and satellite (IUEandHST) observations we aim to determine accurate and precise stellar fundamental parameters for the components of Magellanic Cloud Eclipsing Binaries as well as the distances to these systems and hence the parent galaxies themselves. This poster presents our latest progress.


Author(s):  
Ronald S. Weinstein ◽  
N. Scott McNutt

The Type I simple cold block device was described by Bullivant and Ames in 1966 and represented the product of the first successful effort to simplify the equipment required to do sophisticated freeze-cleave techniques. Bullivant, Weinstein and Someda described the Type II device which is a modification of the Type I device and was developed as a collaborative effort at the Massachusetts General Hospital and the University of Auckland, New Zealand. The modifications reduced specimen contamination and provided controlled specimen warming for heat-etching of fracture faces. We have now tested the Mass. General Hospital version of the Type II device (called the “Type II-MGH device”) on a wide variety of biological specimens and have established temperature and pressure curves for routine heat-etching with the device.


Author(s):  
Sidney D. Kobernick ◽  
Edna A. Elfont ◽  
Neddra L. Brooks

This cytochemical study was designed to investigate early metabolic changes in the aortic wall that might lead to or accompany development of atherosclerotic plaques in rabbits. The hypothesis that the primary cellular alteration leading to plaque formation might be due to changes in either carbohydrate or lipid metabolism led to histochemical studies that showed elevation of G-6-Pase in atherosclerotic plaques of rabbit aorta. This observation initiated the present investigation to determine how early in plaque formation and in which cells this change could be observed.Male New Zealand white rabbits of approximately 2000 kg consumed normal diets or diets containing 0.25 or 1.0 gm of cholesterol per day for 10, 50 and 90 days. Aortas were injected jin situ with glutaraldehyde fixative and dissected out. The plaques were identified, isolated, minced and fixed for not more than 10 minutes. Incubation and postfixation proceeded as described by Leskes and co-workers.


1998 ◽  
Vol 36 (5) ◽  
pp. 255-262
Author(s):  
SIMPANYA ◽  
JARVIS ◽  
BAXTER

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