Rheological Characteristics of Polymers: Theoretical Modeling Perspective

AbstractThe most important property of cements and concretes after strength is the workability, which is controlled by the rheological characteristics of the mix. Theoretical modeling having proved complicated and in some cases mathematically untractable, cement specialists have concentrated on empirical based models for the last two decades. The major theoretical contributions to date on the properties of colloidal and concentrated suspensions are summarized and a general framework for theoretical modeling of cement viscosity is established. The empirical modeling and the experimental investigation of the rheological properties of fresh cements are reviewed and discussed. A semi-empirical model is proposed and its validity tested in the interpretation of some published experimental results.

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The role of ligands in electron transport in nanocrystal solids

Nanoscale ◽

10.1039/d0nr06892f ◽

2020 ◽

Vol 12 (45) ◽

pp. 23028-23035

Author(s):

Artem R. Khabibullin ◽

Alexander L. Efros ◽

Steven C. Erwin

Keyword(s):

Electron Transport ◽

Theoretical Modeling

Theoretical modeling of wavefunction overlap in nanocrystal solids elucidates the important role played by ligands in electron transport.

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Hysteresis in spectral state transitions – a challenge for theoretical modeling

Astronomy and Astrophysics ◽

10.1051/0004-6361:20041631 ◽

2005 ◽

Vol 432 (1) ◽

pp. 181-187 ◽

Cited By ~ 58

Author(s):

E. Meyer-Hofmeister ◽

B. F. Liu ◽

F. Meyer

Keyword(s):

Theoretical Modeling ◽

State Transitions ◽

Spectral State

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Epistemological Status of Models and Thought Experiments in Economics

Voprosy Ekonomiki ◽

10.32609/0042-8736-2015-2-123-140 ◽

2015 ◽

pp. 123-140 ◽

Cited By ~ 1

Author(s):

O. Koshovets ◽

T. Varkhotov

Keyword(s):

Natural Science ◽

Thought Experiment ◽

Thought Experiments ◽

Theoretical Modeling ◽

Epistemological Status ◽

Epistemological Analysis ◽

Field Of Inquiry

The paper considers the analogy of theoretical modeling and thought experiment in economics. The authors provide historical and epistemological analysis of thought experiments and their relations to the material experiments in natural science. They conclude that thought experiments as instruments are used both in physics and in economics, but in radically different ways. In the natural science, a thought experiment is tightly connected to the material experimentation, while in economics it is used in isolation. Material experiments serve as a means to demonstrate the reality, while thought experiments cannot be a full-fledged instrument of studying the reality. Rather, they constitute the instrument of structuring the field of inquiry.

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Theoretical modeling of the regular olivine intergrowths in the mimetic paramorphosis after ringwoodite and wadsleyite

Moscow University Bulletin. Series 4. Geology ◽

10.33623/0579-9406-2018-4-3-12 ◽

2018 ◽

pp. 3-12

Author(s):

B. B. Shkursky

Keyword(s):

Transition Zone ◽

Theoretical Modeling ◽

Mantle Transition Zone ◽

Misorientation Angles

Theoretical modeling of regular olivine grains misorientations in mimetic paramorphoses after ringwoodite and wadsleyite, the formation of which during the ascension of matter from the Mantle Transition Zone is expected, has been carried out. The coordinates of the misorientation axes and the misorientation angles, characterizing 10 operations of alignment in the pair intergrowths of olivine grains, eight of which are twins, are calculated. Possible conditions for the formation of mimetic paramorphoses predicted here, and the chances of their persistence are discussed. The calculated orientations are compared with the known twinning laws of olivine.

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