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Twin boundaries are partly responsible for shock hardening and for many of the changes that occur in cold work of metals with limited slip systems or at very low temperatures. They also occur due to martensitic transformations : the motion of twin boundaries is responsible for the pseudoelastic and shape-memory behavior of nitinol , and their ...
A twin boundary is a defect that introduces a plane of mirror symmetry in the ordering of a crystal. For example, in cubic close-packed crystals, the stacking sequence of a twin boundary would be ABCABCBACBA. On planes of single crystals, steps between atomically flat terraces can also be regarded as planar defects.
The social model is usually contrasted directly with the medical model of disability. [5] Whereas the medical model views disability as a problem caused within the individual, the social model views disability as a problem with the society in which the individual lives. The social model, like the affirmation model, was created by disabled ...
A large body of research in meaningful 'real-world' contexts lends support to the applicability of the common ingroup identity model. In a diverse range of intergroup situations, it has been demonstrated that the conditions specified by the contact hypothesis (i.e. cooperative interaction) reduce intergroup bias through transforming members' representations of separate group memberships to one ...
It is often contrasted with the social model of disability. The medical model focuses on curing or managing illness or disability. By extension, the medical model supposes a compassionate or just society invests resources in health care and related services in an attempt to cure or manage disabilities medically. This is in an aim to expand or ...
A Personal practice model (PPM) is a social work tool for understanding and linking theories to each other and to the practical tasks of social work. Mullen [ 1 ] describes the PPM as “the art and science of social work”, or more prosaically, “an explicit conceptual scheme that expresses a worker's view of practice”.
Boundary-work is part of science studies. In boundary-work, boundaries, demarcations, or other divisions between fields of knowledge are created, advocated, attacked, or reinforced. Such delineations often have high stakes for the participants, [1] and carry the implication that such boundaries are flexible and socially constructed. [citation ...
Integrated social work refers to the use of a holistic approach in the practice of social work [1] It differs from Eclecticism in that whilst eclectic social work uses differ parts of a variety of social work theories and models, integrative social work seeks to blend different theories, models, and methods into a personalized and coherent approach that provides lasting solutions to the ...