نتایج جستجو برای: second demographic transition theory

تعداد نتایج: 1648958  

Journal: :physical chemistry research 0
abdulfatai adabara siaka ahmadu bello university, zaria adamu uzairu sulaiman idris hamza abba

reaction mechanism among indoline-2,3-dione, pyrrolidine-2-carboxylic acid and (z)-2-(1-(2-hydroxynaphthalen-1-yl)ethylidene)hydroxycarboxamide to form 1’-((((aminooxy)carbonyl)amino)methyl)-2’-(1-hydroxynaphthalen-2-yl)-2’-methyl-1’,2’,5’,6’,7’,7a’-hexahydrospiro[indoline-3,3’-pyrrolo[1,2-a]imidazole-2-one was investigated using density functional theory (dft) at b3lyp basis theory. the three-...

2003
K Holland M Pepe U.-J Wiese

Pure Yang-Mills theory has a finite-temperature phase transition, separating the confined and deconfined bulk phases. Svetitsky and Yaffe conjectured that if this phase transition is of second order, it belongs to the universality class of transitions for particular scalar field theories in one lower dimension. We examine Yang-Mills theory with the symplectic gauge groups Sp(N). We find new evi...

پایان نامه :دانشگاه تربیت معلم - تهران - دانشکده علوم 1393

in this thesis, structural, electronical, and optical properties of inverse pervskite(ca3pbo) in cubic phase have been investigated.the calculation have been done based on density functional theory and according to generalized gradiant approximate (gga) as correlating potential. in order to calculate the configurations, implementing in the wien2k code have been used from 2013 version. first of ...

A Avazpour, S M Hekmatzadeh,

Density functional approach was used to study the isotropic- nematic (I-N) transition and calculate the values of freezing parameters of the Gay- Berne liquid crystal model. New direct and pair correlation functions of a molecular fluid with Gay- Berne pair potential were used. These new functions were used in density functional theory as input to calculate the isotropic- nematic transition den...

2008
Vladimir Burdyuzha

] A quark-gluon phase transition in the Universe is researched after which vacuum (dark) energy has hardened and become cosmological constant. Before this a vacuum component of the Universe was changing by jumps during phase transitions since vacuum condensates of quantum fields carried a negative contribution in its positive density energy. This quintessence period of the Universe life took pl...

1998
Saumen Datta

The SO(3) lattice gauge theory is investigated by Monte Carlo techniques on N σ × 2 lattices with Nσ =6, 8, 10, 12, 16 and 24, in order to shed more light on the interplay of the deconfinement and bulk phase transition in this theory. Our results on average action, adjoint Polyakov loop La, and their susceptibilities clearly demonstrate the absence of any first order phase transition of either ...

2010
Lukasz Fidkowski Alexei Kitaev

We describe in detail a counterexample to the topological classification of free fermion systems. We deal with a one-dimensional chain of Majorana fermions with an unusual T symmetry. The topological invariant for the free fermion classification lies in Z, but with the introduction of interactions the Z is broken to Z8. We illustrate this in the microscopic model of the Majorana chain by constr...

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