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ISSN:    frecuency : 4   format : Electrónica

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Volume 22 Number 4 Year 2012

12 articles in this issue 

Pham Tri Nang,Pham Xuan Yem

The recent BaBar measurements of the γ+γ∗→π0" role="presentation" style="position: relative;">?+?*?p0?+?*?p0\gamma +\gamma ^{ * }  \to \pi ^{0 } form factor show spectacular deviation from perturbative QCD computati... see more

Pags. 289  

Nguyen Van Thanh,Nguyen Thi Nguyet Anh,Nguyen Anh Tuan

We present a density functional study on the geometric structure, electronic structureand spin transition of a series of Fe2+ spin-crossover molecules, i.e., [Fe(abpt)2(NCS)2] (1),[Fe(abpt)2(NCSe)2] (2), and [Fe(abpt)2(C(CN)3)2] (3) with abpt = 4-amino-3,... see more

Pags. 309  

Le Thi Hong Lien,Vu Ngoc Tuoc,Nguyen Thi Thuong

We present a semi-abinitio - Density Functional Based Tight Binding (DFTB) study on the atomic and electronic structure of ZnS Nanowire (NW) and examine the dependence of surface stress on nanowire lateral size and shape. The ZnS wurtzite wire size ranges... see more

Pags. 317  

Dinh Nhu Thao,Nguyen Thanh Tien

We present a calculation of the distribution of two-dimensional electron gas (2DEG)along the quantization direction in an AlGaN/GaN modulation-doped heterostructure (MDHS).The main con?nement sources from ionized donors, 2DEG and polarization charges are ... see more

Pags. 327  

Pham Dinh Tam,Pham Duy Tan,Nguyen Quang Hoc

By applying the model of pair interaction, the model of central atom, the method of coordination sphere and the statistical moment method, we calculate the free energy of  ß- CuZn ordered alloy and determine the dependence of ordered parameter and la... see more

Pags. 337  

Dinh Xuan Khoa,Chu Van Lanh

In the paper the set of dimensionless rate equations for the pump, Stokes and anti-Stokes powers in the trio-cavity Raman laser pumped by pulsed Gaussian beam is introduced. By numerical Runger-Kuta method, those equations are resolved and the optimal nor... see more

Pags. 343  

Nguyen Van Phu,Dinh Van Hoang,Le Ngoc Anh

In this report we demonstrate the transformation of the photon density curves in operation of a three modes random laser when the gain coefficients of modes depending on time.Supposing gain coefficients having Gaussian profile and using Matlab language, w... see more

Pags. 349  

Bui Van Hai,Dinh Van Trung,Nguyen Xuan Tuan,Dao Duy Thang,Nguyen Thanh Binh

Abstract. Cirrus clouds in the upper troposphere and the lower stratosphere have attracted great attention due to their important role and impact on the atmospheric radioactive balance. Because cirrus clouds are located high in the atmosphere, their study... see more

Pags. 357  

Nguyen Van Hiep,Pham Tuan Anh,Pham Ngoc Diep,Pham Ngoc Dong,Do Thi Hoai,Pham Thi Tuyet Nhung,Nguyen Thi Thao,Pierre Darriulat

A small radio telescope (SRT) has been installed on the roof of the Hanoi astrophysics laboratory VATLY. It is equipped with a 2.6 m diameter mobile parabolic dish remotely controlled in elevation and azimuth and with super-heterodyne detection around the... see more

Pags. 365  

Dang Quang Thieu,Tran Ngoc Toan,Nguyen Thi Bao My,Nguyen Van Sy,Vu Van Tien,Nguyen Thi Thuy Mai,Le Dinh Cuong

We report on the design and construction of an Early Warning Environmental Radiation Monitoring Station (EWERMS), used ONLINE in the environmental radiation monitoring and early warning network. It has a  high sensitivity and can send a prompt alarm ... see more

Pags. 375  

Pham Thi Thanh Nga,Nguyen Toan Thang

ERRATUM: Néel State in the Fermionized Spin 12\frac{1}{2} Heisenberg Antiferromagnet on Hypercubic and Triangular Lattices [Pham Thi Thanh Nga and Nguyen Toan Thang, Comm. Phys. 22\textit{Comm. Phys. } \textbf{22} (1) (2012) 33]

Pags. 383