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The phase transition

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  • In this work, we proposed a new model in order to study the phase transition behaviour of animal group. The individuals in the group are considered as the XY spins which can move freely in a plane with the same speed. For the interactions between every pairs of the individuals, we used the Hamiltonian of the system in the model of spin current with including a long-range Morse potential.

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  • The system is put under a source of external perturbation called “noise”, the individuals can freely move from one site to another site on a two-dimension triangular lattice. We use the Monte-Carlo simulation technique for studying the behavior of the model with varying noise. For simplicity, we consider the orientation of individuals which has q states as in the Potts model. We show that the system has three phases which correspond to the uncollected, flocking and runaway behaviors at very low, medium and high noise, respectively. These phases are separated by two first-order transitions.

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  • In this paper we have discussed all possible boundary values used in the ordinary Skyrme model. Among the solutions to these boundary conditions the non-skyrmion and skyrmion one exist according to certain choices. The free parameter R in the boundary value conditions is shown to be related to the density of the nuclear matter in its Wigner-Seitz model.

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  • In this work, we consider a group of shes as the particles, but we assumed that only the individuals of its neighbors within a circle sector with central angle φ (is called angle of view) and radius R, are taken into account the average direction of motion. We used a similar model as the well known XY spin model on a square lattice of linear size L, the particles can move freely on the plane (an o-lattice model).

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  • In this paper, we investigate the hadron-quark (HQ) phase transition occurs beyond the chiral phase transition in the nuclear matter. The results show that there exits a quarkyonic-like phase, appeared just before deconfinement, when the chiral symmetry is restored but the elementary excitation modes are still nucleonic.

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  • In this work, we study the nature of phase transition in a face centered cubic (FCC) antiferromagnet with Ising spins. The spin-glass character depends on the concentration p of ferromagnetic bonds randomly generated into the system. We introduce a new quantity MQ combined by the Edwards-Anderson order parameter Q and the standard magnetization M.

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  • The topological Lifshitz phase transition is studied systematically within an effective model of QCD, in which the chiral symmetry, broken at zero temperature, is not restored at high temperature and/or baryon chemical potential. It is found that during phase transition the quark system undergoes a first-order transition from low density fully-gapped state to high density state with Fermi sphere which is protected by momentum-space topology. The Lifshitz phase diagram in the plane of temperature and baryon chemical potential is established.

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  • The aims of thesis: studying of the phase structure of LSM and LSMq with two different forms of symmetry breaking term: the standard case and non – standard case; studying of the effect from neutrality condition on the phase structure of LSM and LSMq; studying of the chiral phase transition in compactified space

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  • The instructional design approach puts focus on the syntactic level of TSSL, to explain how visualizing gradual transitions between hierarchic levels of the schema is effective in database modeling. The current work demonstrates the approach, and at the next phase we plan to experimentally test the effectiveness of the approach by comparing performance and attitudes of students who are exposed to emphasizing the syntax of the gradual transitions in schema structure to those who are not exposed to it.

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  • Smart polymers are macromolecules capable of undergoing rapid, reversible phase transitions from a hydrophilic to a hydrophobic microstructure. These transitions are triggered by small shifts in the local environment, such as slight variations in temperature, pH, ionic strength, or the concentration of specific substances like sugars. Smart polymers have an extensive range of applications, but this book focuses solely on their roles within the fields of bioseparation and biomedicine. Until recently, polymers were considered to be passive participants within these fields.

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  • (bq) part 1 book "thermodynamics and chemistry" has contents: introduction, systems and their properties, the first law, the first law, thermodynamic potentials, the third law and cryogenics, pure substances in single phases, phase transitions and equilibria of pure substances.

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  • This book is based on a short graduate course given by one of us (M.G) at New York University and at Bar-Ilan University, Israel. The decision to publish these lectures as a book was made, after some doubts, for the following reason. The theory of phase transitions, with excellent agreement between theory and experiment, was developed some forty years ago culminating in Wilson’s Nobel prize and the Wolf prize awarded to Kadanoff, Fisher and Wilson.

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  • Lecture Monte carlo simulations: Application to lattice models, part I - Basics. The main contents of this chapter include all of the following: Introduction, thermodynamics and statistical mechanics, phase transition, probability theory.

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  • Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành y học dành cho các bạn tham khảo đề tài: Cold- and light-induced changes in the transcriptome of wheat leading to phase transition from vegetative to reproductive growth

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  • Tuyển tập các báo cáo nghiên cứu về hóa học được đăng trên tạp chí hóa hoc quốc tế đề tài : Effects of NiO nanoparticles on the magnetic properties and diffuse phase transition of BZT/NiO composites

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  • Besides introduction and conclusion, this thesis consists of 3 chapters. Chapter 1. Overview of Bose-Einstein condensate. Theory of BECs.Chapter 2. Interfacial tension and wetting phase transition in the system of BECs limited by one hard wall. Chapter 3. Finite-size effects of interfacial tension in the system of BECs limited by two hard walls.

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  • The temperature is increased from 50 K to 5500 K in order to observe the change of the structure during heating process. Various thermodynamic quantities related to the change of structure are calculated such as the radial distribution functions the Lindemann criterion, the occurrence/growth of liquidlike atoms, the formation of clusters, and the ring statistics. The melting point is defined. The phase transition from solid to liquid states exhibits first order behavior.

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  • The Bose - Einstein condensation of ultra - cold Bose gases is studied by means of the Cornwall - Jackiw - Tomboulis effective potential approach in the improved double - bubble approximation which preserves the Goldstone theorem. The phase structure of Bose - Einstein condensate associating with two different types of phase transition is systematically investigated. Its main feature is that the symmetry which was broken at zero temperature gets restored at higher temperature.

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