scholarly journals Feature engineering of material structure for AI-based materials knowledge systems

2020 ◽  
Vol 128 (4) ◽  
pp. 041103 ◽  
Author(s):  
Surya R. Kalidindi
Keyword(s):  
Knowledge Systems ◽  
Material Structure ◽  
Feature Engineering ◽  
Materials Knowledge Systems ◽  
Materials Knowledge

Electron Microscopy in Molecular Biology

1967 ◽  
Vol 25 ◽  
pp. 2-3
Author(s):  
Cecil E. Hall
Keyword(s):  
Electron Microscopy ◽  
Molecular Biology ◽  
Noise Level ◽  
Molecular Structures ◽  
Material Structure ◽  
The Arts ◽  
Shadow Casting ◽  
Electron Image ◽  
High Degree ◽  
Very High

The visualization of organic macromolecules such as proteins, nucleic acids, viruses and virus components has reached its high degree of effectiveness owing to refinements and reliability of instruments and to the invention of methods for enhancing the structure of these materials within the electron image. The latter techniques have been most important because what can be seen depends upon the molecular and atomic character of the object as modified which is rarely evident in the pristine material. Structure may thus be displayed by the arts of positive and negative staining, shadow casting, replication and other techniques. Enhancement of contrast, which delineates bounds of isolated macromolecules has been effected progressively over the years as illustrated in Figs. 1, 2, 3 and 4 by these methods. We now look to the future wondering what other visions are waiting to be seen. The instrument designers will need to exact from the arts of fabrication the performance that theory has prescribed as well as methods for phase and interference contrast with explorations of the potentialities of very high and very low voltages. Chemistry must play an increasingly important part in future progress by providing specific stain molecules of high visibility, substrates of vanishing “noise” level and means for preservation of molecular structures that usually exist in a solvated condition.

Plastic Deformation in Microtomed Sections

1971 ◽  
Vol 29 ◽  
pp. 458-459
Author(s):  
J. Temple Black
Keyword(s):  
Plastic Deformation ◽  
Plastic Strain ◽  
Applied Stress ◽  
Elastic Strain ◽  
High Strain ◽  
Tool Material ◽  
Cutting Edge ◽  
Material Structure ◽  
Geometrical Constraints

The output of the ultramicrotomy process with its high strain levels is dependent upon the input, ie., the nature of the material being machined. Apart from the geometrical constraints offered by the rake and clearance faces of the tool, each material is free to deform in whatever manner necessary to satisfy its material structure and interatomic constraints. Noncrystalline materials appear to survive the process undamaged when observed in the TEM. As has been demonstrated however microtomed plastics do in fact suffer damage to the top and bottom surfaces of the section regardless of the sharpness of the cutting edge or the tool material. The energy required to seperate the section from the block is not easily propogated through the section because the material is amorphous in nature and has no preferred crystalline planes upon which defects can move large distances to relieve the applied stress. Thus, the cutting stresses are supported elastically in the internal or bulk and plastically in the surfaces. The elastic strain can be recovered while the plastic strain is not reversible and will remain in the section after cutting is complete.

The Economic Theory of the Firm: A Generalization

2012 ◽  
pp. 41-66 ◽  
Author(s):  
M. Storchevoy
Keyword(s):  
Economic Theory ◽  
General Theory ◽  
Contract Theory ◽  
Theory Of The Firm ◽  
Material Structure ◽  
Structural Factors ◽  
Boundaries Of The Firm ◽  
Opportunistic Behaviour ◽  
New Variant

The paper deals with development of a general theory of the firm. It discusses the demand for such a theory, reviews existing approaches to its generalization, and offers a new variant of general theory of the firm based on the contract theory. The theory is based on minimization of opportunistic behaviour determined by the material structure of production (a classification of ten structural factors is offered). This framework is applied to the analysis of three boundaries problems (boundaries of the job, boundaries of the unit, boundaries of the firm) and five integration dilemmas (vertical, horizontal, functional, related, and conglomerate).

Cultural Diversity and Critical Dietetics: A Scholarship of Cross-Cultural Engagement

2016 ◽  
Vol 3 (2) ◽  
pp. 23-31
Author(s):  
Craig Alan Hassel
Keyword(s):  
Ways Of Knowing ◽  
Cross Cultural ◽  
Knowledge Systems ◽  
Human Society ◽  
Health Issues ◽  
Post Colonial ◽  
Cultural Engagement ◽  
Cultural Perspectives ◽  
Culturally Different ◽  
Classical Chinese Medicine

As every human society has developed its own ways of knowing nature in order to survive, dietitians can benefit from an emerging scholarship of “cross-cultural engagement” (CCE).  CCE asks dietitians to move beyond the orthodoxy of their academic training by temporarily experiencing culturally diverse knowledge systems, inhabiting different background assumptions and presuppositions of how the world works.  Although this practice may seem de- stabilizing, it allows for significant outcomes not afforded by conventional dietetics scholarship.  First, culturally different knowledge systems including those of Africa, Ayurveda, classical Chinese medicine and indigenous societies become more empathetically understood, minimizing the distortions created when forcing conformity with biomedical paradigms.  This lessens potential for erroneous interpretations.  Second, implicit background assumptions of the dietetics profession become more apparent, enabling a more critical appraisal of its underlying epistemology.  Third, new forms of post-colonial intercultural inquiry can begin to develop over time as dietetics professionals develop capacities to reframe food and health issues from different cultural perspectives.  CCE scholarship offers dietetics professionals a means to more fully appreciate knowledge assets that lie beyond professionally maintained parameters of truth, and a practice for challenging and moving boundaries of credibility.

Track 2.a Introduction

2019 ◽  
Vol 2 (1) ◽  
Author(s):  
Sucharita BENIWAL ◽  
Sahil MATHUR ◽  
Lesley-Ann NOEL ◽  
Cilla PEMBERTON ◽  
Suchitra BALASUBRAHMANYAN ◽  
...  
Keyword(s):  
Case Studies ◽  
Local Knowledge ◽  
Ways Of Knowing ◽  
Social Contexts ◽  
Knowledge Systems ◽  
Theoretical Frameworks ◽  
Native Communities ◽  
Cultural Systems ◽  
Local Practices

The aim of this track was to question the divide between the nature of knowledge understood as experiential in indigenous contexts and science as an objective transferable knowledge. However, these can co-exist and inform design practices within transforming social contexts. The track aimed to challenge the hegemony of dominant knowledge systems, and demonstrate co-existence. The track also hoped to make a case for other systems of knowledges and ways of knowing through examples from native communities. The track was particularly interested in, first, how innovators use indigenous and cultural systems and frameworks to manage or promote innovation and second, the role of local knowledge and culture in transforming innovation as well as the form of local practices inspired innovation. The contributions also aspired to challenge through examples, case studies, theoretical frameworks and methodologies the hegemony of dominant knowledge systems, the divides of ‘academic’ vs ‘non-academic’ and ‘traditional’ vs ‘non-traditional’.

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