9 articles in this issue
Hoang Manh Tien,Nguyen Hai Chau,Phan Thi Kim Loan
We suggest a general approach based on the nearest-neighbor tight-binding approximation (TB) to investigate the band structure and conductance of a quasi-one dimensional system. Numerical calculations carried out for Graphene nanoribbons (GNRs) with diffe... see more
V. V. Kulish,I. V. Gubanov,Le Huu Dien,Nguyen Ai Viet,O. V. Lysenko
A set of new ideas and concepts (which the authors treat as a new version of the theory of hierarchic dynamic systems) are set forth in the article. In turn, the set of hierarchic principles is put in the methodological basis of this theory. It is shows, ... see more
Pham Hoai Linh,Tran Dang Thanh,Do Hung Manh,Nguyen Chi Thuan,Le Van Hong,Nguyen Xuan Phuc
In this paper, we report results on the fabrication and magnetic properties of spinel ferrite Mn1-xZnxFe2O4 (0 = x = 0.8) nanoparticles. The nanoparticles were synthesized by a co-precipitation method. The effects of substituting Zn for Mn on the magnetic... see more
Pho Thi Nguyet Hang,Pham Thuy Dung
The tensor solution for the electromagnetic wave being in quadrature with the surface of the cholesteric liquid crystal under the influence of the external electric field along axis of swing of crystal, has been found. Description of the reflection, trans... see more
Tran Minh Thi
ZnS:Mn were prepared by wet chemical method with Mn doping concentration from 0 at% to 12 at%. The structure and particle size of the obtained powders were measured by X-ray diffraction (XRD) and scanning electron microscopy (SEM) and shown that all sampl... see more
Mai Van Luu,Dinh Xuan Khoa,Vu Ngoc Sau,Ho Quang Quy
Based on the assumption that Gaussian pump power of diode laser bar is the same at any cross-section along the laser rod and its curvated surface plays as thin lens, the expression describing the pump intensity distribution inside laser rod was obtained b... see more
Truong Thi Hong Loan,Dang Nguyen Phuong,Do Pham Huu Phong,Tran Ai Khanh
When determining radioactivities in environmental samples using low-level gamma spectroscopy, in order to raise detection limit, voluminous samples are used. It takes in account for the self-absorption (self-attenuation) of gamma rays in samples. The self... see more
Nguyen Tuan Khai,Tran Duc Thiep,Truong Thi An,Phan Viet Cuong,Nguyen The Vinh
The photonuclear reactions of (?, xn) or (?, xnp) types can be used to produce high-intensity neutron sources for research and applied purposes. In this work a Monte-Carlo calculation has been used to evaluate the production yield of neutrons from the (?,... see more
Vo Van Thuan
This work deals with the nature of Majorana particles by applying the time-like formalism of the superluminal Lorentz transformation (SLT). It is proposed that along with the SLT of the space-time coordinates, the Dirac equation should be treated simultan... see more