scholarly journals Mean field calculation of thermal properties of simple nucleon matter on a lattice

2004 ◽  
Vol 70 (1) ◽  
Author(s):  
T. Abe ◽  
R. Seki ◽  
A. N. Kocharian
Keyword(s):  
Thermal Properties ◽  
Mean Field ◽  
Field Calculation ◽  
Nucleon Matter

Relaxation of a tethered polymer using dynamic mean field calculation

2002 ◽  
Vol 117 (21) ◽  
pp. 9959-9960 ◽  
Author(s):  
Kenji Furuichi ◽  
Chisato Nonomura ◽  
Toshihiro Kawakatsu ◽  
Masao Doi
Keyword(s):  
Mean Field ◽  
Field Calculation

Mean‐Field Calculation of M Z for Randomly Branched Condensation Polymers

2019 ◽  
Vol 57 (21) ◽  
pp. 1415-1422
Author(s):  
Roy Odle ◽  
Joseph D. Mitchell ◽  
John T. Bendler
Keyword(s):  
Mean Field ◽  
Field Calculation ◽  
Condensation Polymers

Mesophases of Regularly Branched Copolymers

2001 ◽  
Vol 710 ◽  
Author(s):  
Galen T. Pickett
Keyword(s):  
Phase Diagram ◽  
Block Copolymers ◽  
Path Analysis ◽  
Mean Field ◽  
Tree Structure ◽  
Field Calculation ◽  
Branched Copolymers ◽  
Classical Path ◽  
Self Consistent

ABSTRACTThe phase diagram of A/B block copolymers is determined when the A block is a flexible, linear homopolymer, and the B block has a regularly branched tree structure with G generations. The predictions of a classical-path analysis and a lattice self-consistent mean field calculation are in general agreement. The phase diagram is considerably skewed toward keeping the A blocks inside cylindrical or spherical cores with the branched block forming a corona. There is little, if any, tendency for the branched arms to fold back to facilitate packing.

A Systematic Material Design Approach to Develop Self-Lubricating Ceramic-Composite Tool Inserts for Dry Cutting Conditions

2019 ◽  
Author(s):  
Syed Sohail Akhtar
Keyword(s):  
Fracture Toughness ◽  
Thermal Properties ◽  
Volume Fraction ◽  
Mean Field ◽  
Material Design ◽  
Ceramic Materials ◽  
Ceramic Composites ◽  
Design Stage ◽  
Mechanical And Thermal Properties ◽  
Dry Cutting

Abstract A systematic approach is the focus of the current work in order to design and develop ceramic composites for cutting tool inserts with a balanced combination of structural and thermal properties together with enhanced antifriction characteristics. In the material design stage, various combinations of ceramic materials and inclusions with optimum self-lubricating attributes are selected based on predictions of mechanical and thermal properties using in-house built codes. A mean-field homogenization scheme is used to predict the constitutive behavior while J-integral based fracture toughness model is used to predict the effective fracture toughness of the ceramic composites. An effective medium approximation is used to predict the potential optimum thermal properties. The current strategy incorporates thermal and structural properties of composites as a constraint on the design process together with self-lubrication property. Among various metallic and carbon-based fillers, silicon carbide (SiC) together with titanium oxide (TiO2) and graphite are found the most suitable candidate fillers in alumina (Al2O3) matrix to produce cutting inserts with best combinations of thermal, structural and tribological properties. As a validation, various combinations of Al2O3-SiC-TiO2 and Al2O3-SiC-TiO2 composites are developed in line with the designed range of filler size and volume fraction using Spark Plasma Sintering (SPS) process to complement the material design.

scholarly journals Systematic Search For Evidence of Tetrahedral and Octahedral Symmetries in Subatomic Physics: Follow-up of the First Identification Case in 152Sm

2019 ◽  
Vol 223 ◽  
pp. 01014
Author(s):  
Jerzy Dudek ◽  
Irene Dedes ◽  
Abdelghafar Gaamouci ◽  
Jie Yang ◽  
Andrzej Baran ◽  
...  
Keyword(s):  
Group Theory ◽  
Periodic Table ◽  
Mean Field ◽  
Exotic Nuclei ◽  
Field Calculation ◽  
Research Strategies ◽  
Tetrahedral Symmetry ◽  
Atomic Nuclei ◽  
Calculation Results ◽  
New Research

In a recent article [1] group-theory representation-methods have been combined with the realistic mean-field calculation results to elaborate new, specifically designed methods of experimental identification of the tetrahedral/octahedral symmetries in atomic nuclei. The authors demonstrated that experimental data on 152 Sm existing in the literature are fully compatible with the extremely restrictive group-theory criteria of simultaneous presence of tetrahedral and octahedral symmetries, thus identifying these symmetries in subatomic physics for the first time. We discuss theory predictions related to the systematic presence of these symmetries as well as their manifestations throughout the Periodic Table in the form of islands centred around the doublymagic tetrahedral-symmetry nuclei. The corresponding theory predictions are discussed in the context of the planned new experiments, which would employ the advanced mass-spectrometry methods [2], in view of the new experimental search criteria [1]. The addressed field of symmetry-research presents particularly promising potentialities in the domain of exotic nuclei studies. Indeed, as it can be demonstrated, in the exact tetrahedral and/or octahedral symmetry limits the corresponding nuclei emit neither E2 nor E1 radiation generating isomeric states with lifetimes which can become much longer than those of the related ground states. This is expected to open the new research strategies for the whole domain of the exotic nuclei studies throughout the Periodic Table.

THE ROLE OF ANTIKAON CONDENSATES IN THE EQUATION OF STATE OF NEUTRON STARS

2010 ◽  
Vol 19 (08n10) ◽  
pp. 1545-1548 ◽  
Author(s):  
F. FERNÁNDEZ ◽  
A. MESQUITA ◽  
M. RAZEIRA ◽  
C. A. Z. VASCONCELLOS
Keyword(s):  
Neutron Stars ◽  
Electric Charge ◽  
Chemical Potential ◽  
Mean Field ◽  
Field Approximation ◽  
Mean Field Approximation ◽  
Charge Neutrality ◽  
The Mean ◽  
Nucleon Matter

We study the consequences of the presence of a negative electric charge condensate of antikaons in neutron stars using an effective model with derivative couplings. In our formalism, nucleons interact through the exchange of σ, ω and ϱ mesons, in the presence of electrons and muons, to accomplish electric charge neutrality and beta equilibrium. The phase transition to the antikaon condensate was implemented through the Gibbs conditions combined with the mean-field approximation, giving rise to a mixed phase of coexistence between nucleon matter and the antikaon condensate. Assuming neutrino-free matter, we observe a rapid decrease of the electron chemical potential produced by the gradual substitution of electrons by kaons to accomplish electric charge neutrality. The exotic composition of matter in neutron star including antikaon condensation and nucleons can yield a maximum mass of about M ns ~ 1.76 M ⊙.

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