Computer experiment on the electronic density of states of a two-dimensional model of a liquid metal

1982 ◽  
Vol 15 (17) ◽  
pp. 3695-3710 ◽  
Author(s):  
K Satoh ◽  
K Niizeki
Keyword(s):  
Liquid Metal ◽  
Density Of States ◽  
Computer Experiment ◽  
Two Dimensional ◽  
Dimensional Model ◽  
Electronic Density ◽  
Electronic Density Of States ◽  
Two Dimensional Model

A Modified Extended Hückel Calculations For Q1D-Graphites

1990 ◽  
Vol 214 ◽  
Author(s):  
D. Raković ◽  
R. Kostić ◽  
S. Krstić ◽  
I. Davidova ◽  
B. L. Fayfel ◽  
...  
Keyword(s):  
Electronic Properties ◽  
Density Of States ◽  
Computational Results ◽  
Two Dimensional ◽  
Electronic Density ◽  
Electronic Density Of States ◽  
Energy Gaps ◽  
Extended Hückel ◽  
Extended Hückel Calculations

ABSTRACTIn this paper we have computed electronic density of states for several Q1D graphites: polyacene (PA), polyacenacene (PAA), polyphenanthrene (PP), polyphenanthrophenanthrene (PPhP), and polyperinaphthalene (PPN). The modified extended Hiickel method for finite Q1D chains has been adopted. The change of the electronic properties due to the growth of the Q1D-graphites toward the two-dimensional direction, starting from trans-polyacetylene, cis-polyacetylene or poly(p-phenylene), is discussed. Our calculations show that PA, PAA, and PPN are intrinsic conductors, while PP and PPh are semiconductors with energy gaps of 1,4 eV and 0,8 eV, respectively. The comparison with other computational results is presented.

Development of a two-dimensional model for the thermohydraulic analysis of the hot pool in liquid metal reactors

2002 ◽  
Vol 29 (1) ◽  
pp. 21-40 ◽  
Author(s):  
Yong-Bum Lee ◽  
Won Pyo Chang ◽  
Young Min Kwon ◽  
Kwan Seong Jeong ◽  
Dohee Hahn
Keyword(s):  
Liquid Metal ◽  
Two Dimensional ◽  
Dimensional Model ◽  
Two Dimensional Model

Commitment to pro- versus counter-attitudinal behavior and the dynamics of social representations

2002 ◽  
Vol 61 (1) ◽  
pp. 34-44 ◽  
Author(s):  
Eric Tafani ◽  
Lionel Souchet
Keyword(s):  
Higher Education ◽  
Social Representations ◽  
Cognitive Restructuring ◽  
Social Representation ◽  
Two Dimensional ◽  
Dimensional Model ◽  
Social Actions ◽  
The Social ◽  
Two Dimensional Model ◽  
Students Attitudes

This research uses the counter-attitudinal essay paradigm ( Janis & King, 1954 ) to test the effects of social actions on social representations. Thus, students wrote either a pro- or a counter-attitudinal essay on Higher Education. Three forms of counter-attitudinal essays were manipulated countering respectively a) students’ attitudes towards higher education; b) peripheral beliefs or c) central beliefs associated with this representation object. After writing the essay, students expressed their attitudes towards higher education and evaluated different beliefs associated with it. The structural status of these beliefs was also assessed by a “calling into question” test ( Flament, 1994a ). Results show that behavior challenging either an attitude or peripheral beliefs induces a rationalization process, giving rise to minor modifications of the representational field. These modifications are only on the social evaluative dimension of the social representation. On the other hand, when the behavior challenges central beliefs, the same rationalization process induces a cognitive restructuring of the representational field, i.e., a structural change in the representation. These results and their implications for the experimental study of representational dynamics are discussed with regard to the two-dimensional model of social representations ( Moliner, 1994 ) and rationalization theory ( Beauvois & Joule, 1996 ).

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