Communications in Physics  

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Contents, Vol. 24, No. 4, 2014

Truong Nguyen Tran,Le Viet Dung

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Mohamed Elmansour Hassani

The paper provides an elementary derivation of new superluminal spatio-temporal transformations based on the idea that, conceptually and kinematically, each subluminal, luminal and/or superluminal inertial reference frame has, in addition to its relative ... see more

Nguyen Nhu Dat,Le Thanh Hai

Within the framework of the macroscopic dielectric continuum model the longitudinal optical (LO) phonon modes are derived for a cylindrical semiconductor quantum wire made of semiconductor 1 (well material) embedded in another finite semiconductor 2 (barr... see more

Tran Huu Phat,Le Viet Hoa,Dang Thi Minh Hue

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 B... see more

Trinh Thi Loan,Nguyen Ngoc Long

Anatase Ti1-xCrxO2 nanowires with Cr3+ dopant contents ranging from x = 0 to 0.1 have been successfully synthesized by hydrothermal method. The nanowires were prepared from anatase titanium dioxide powder (TiO2), chrome nitrate (Cr(NO3)3), and sodium hydr... see more

Le Ha Chi,Pham Duy Long,Nguyen Van Chuc,Le Van Hong

TiO2 is one of the most attractive metal oxides because of the excellent chemical and photocatalytic properties. However, a problem in the application of TiO2 is the large band gap energy of 3.2 eV, corresponding to its photocatalytic activity under UV-li... see more

Nguyen Thi Phuong,Nguyen Thi Thao,Pierre Darriulat,Pham Ngoc Diep,Do Thi Hoai,Pham Tuyet Nhung,Pham Tuan Anh

The Moon has been observed using the VATLY radio telescope at frequencies of 1420.4and 1417.6 MHz in order to study the behaviour of the instrument in a domain of ux densityclose to the limit of its sensitivity. Drift scans have revealed a Moon ... see more

Tran Duc Thiep,Truong Thi An,Phan Viet Cuong,Nguyen The Vinh,Bui Minh Hue,A. G. Belov,O. D. Maslov

We studied the isomeric ratios  in  odd-odd nuclei 196^{196}Au,182^{182}Ta  and 194^{194}Ir  with    high spin isomeric states  produced  in 197^{197}Au(?,n)(\gamma,  n) 196m,g^{196m,g}Au, 183^{183}W(?,p)(\gamm... see more