Low quartz On the geometry of its structure framework in terms of the directed bond

1961 ◽  
Vol 116 (1-2) ◽  
pp. 83-100 ◽  
Author(s):  
Abraham Hoffer
Keyword(s):  
Author(s):  
Barbara J. Risman

This final chapter suggests that the incompatibilities of expectations and realities at different levels of the gender structure create “crises tendencies” that may provide leverage that future activists can use to push for social change. While some contemporary social movements agitating for a more feminist and gender inclusive society appear to conflict with each other, Risman argues that using a gender structure framework allows seemingly contradictory feminist and gender inclusive movements to understood they are not alternatives but rather a tapestry, each one taking aim at a different level of our complex gender structure. The chapter concludes with a utopian vision: a call for a fourth wave of feminism to dismantle the gender structure. Since the gender structure constrains freedom, to move toward a more just future we must leave it behind.


2020 ◽  
Vol 2 (4) ◽  
pp. 5-13 ◽  
Author(s):  
A. Cherevatova ◽  
I. Zhernovskaya ◽  
D. Alehin ◽  
M. Kozhuhova ◽  
N. Kozhuhova ◽  
...  

there are a lot of different types of binders for construction purpose, a strong interest is focused on free-of-cement binders of new generation, which are characterized by unique and/or improved performance properties. Among them there is composite nanostructured gypsum binder (CNGB) as a quite new binding system. In the framework of this study the hypothesis of synergetic effect in hardened binding system was proposed and approved. The hypothesis is realized when interaction of two binding systems with different structure formation mechanism such as followings: polymerization-polycondensation and hydration. A number of experiments were carried out and the results were obtained, which demonstrate a resistance of CNGB under high-temperature effect (up to 1000ºC) vs. ordinary gypsum binder. It was determined that a heat-resistance of CNGB is associated with joint crystallization of sulphate-based component (gypsum binder) and highly-reactive silica-based component (in nanostructured binder). Normally, nanostructuted binder is stable under high-temperature exposure. The indicator of synergetic effect is formation of new crystalline phase – hydroxyellestadite Ca5(SiO4)3(SO4)3(OH)2. This phase has unit cell size which is stable under temperature gradient. This characteristic allows saving structure framework in CNGB under high temperature.


2019 ◽  
Vol 22 (3) ◽  
pp. 237-250
Author(s):  
Hadar Baharav ◽  
Elizabeth Newman

Using an inquiry-based approach to address the challenge of improving schools provides opportunities for informed decision making and carries great promise for return on investment. Taking a collaborative approach toward improvement can be complex, yet also rewarding because of the opportunity to leverage the knowledge and capacity of multiple entities. The article presents an example of an education collaborative in Northern California that took an inquiry-based approach to their regional school improvement challenge of improving rates of college readiness and completion. The article provides insight into the structure, framework, and tools that were used to build and support the work of the collaborative, and reflects on the conditions that promote successful implementation of an inquiry-based approach to drive system change. Moreover, because each partner in the collaborative progressed through a unique process of inquiry and improvement, the article affords an opportunity to consider school improvement in multiple settings.


2009 ◽  
Vol 4 ◽  
pp. 24-29 ◽  
Author(s):  
Padam Nepal

Lawrence Cox (1999) has argued that the established perspectives on social movements operate with an inadequately narrow conception of the ‘object’ that is being studied and thus tends to ‘reify’ “movements” as usual activity against essentially static backgrounds, and in its place, he advocates a concept of social movement as the more or less developed articulation of situated rationalities. Following Cox, therefore, the present study perceives social movements as articulations of situated rationalities by perceiving them as a tactical, dialectical response to the harsh realities of the political system. This would help us capture the essential dynamic and transformative aspects of the movement. Any social movement, and for that matter, environmental movements are characterized by the presence of agencies and structural components, which, however, are not a priori and static. They are rather dynamic and get changed and transformed in the course of the movement. Precisely for this reason, the environmental movements can at best be comprehended by way of locating and analyzing the dynamism and transformations of the movements produced by the dialectical interaction of the various components and parameters of the movement over a span of time. Hence, the present paper aims to evaluate the dynamics and transformations of the environmental movements in India, taking the case of the Narmada Bachao Andolan, and, adopting a strategic relational approach within the agent-structure framework as its framework of analysis. For the present purpose, however, we have taken only two variables, namely, Ideology and Leadership and attempted the analysis of their contributions in producing movement dynamics.Hydro Nepal: Journal of Water, Energy and Environment Issue No. 4, January, 2009 Page 24-29


CIRP Annals ◽  
2019 ◽  
Vol 68 (1) ◽  
pp. 125-128 ◽  
Author(s):  
Jean-Yves Dantan ◽  
Ismail El Mouayni ◽  
Leyla Sadeghi ◽  
Ali Siadat ◽  
Alain Etienne

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