HUNG CAO DUC

Description/Abstract We propose to test and calibrate the Forward/Backward Hadron Calorimeter of the CDF (Collider Detector at Fermilab). It is designed to cover a pseudorapidity region of 2.2 less than or equal to/vert bar//eta//vert bar/less than or equal ...

Page 1. A New RFID Authentication Protocol with Ownership Transfer in an Insecure Communication Environment Chih-Hung Wang Dept. ... [2] DN Duc, J. Park, H. Lee and K. Kim, “Enhancing ... 63 – 67. [4] H. Lei and T. Cao, “RFID Protocol enabling Ownership Transfer to protect ...

... Tuan-Dung CAO1, Quang-Minh NGUYEN1, Anh-Duc NGUYEN1, Tan-Hung LE1 1Hanoi University of ... From this short personal profile, the system will analysis and find a place that is ... By accessing web based application through a browser, Alice just specifies her travel interest ...

The incoherent quasi-elastic neutron scattering (IQNS) method is a useful technique to study biomolecular dynamics. The versatility of the method makes possible motional studies of biomolecules in different forms: powder, crystal, and solution; and at different temperatures. Thus, it allows for the investigation of biomolecular dynamics over a wide-range of physical conditions. We have used the IQNS method to study the motions of side chains in trypsin and myoglobin at various D_2O hydration levels. The scattering spectra S(Q, omega) were measured in constant-Q mode. The protein in powder form exhibits vibrational high-frequency motions, while the protein in solution and in crystals are characterized by diffusive jumps, and high-frequency vibrations. At temperatures below 200K, the S(Q, omega) for these proteins in solution is similar to an harmonic solid. As temperature increases, a transition is seen at 200K, above which the protein becomes more liquid -like with rapid transitions between conformational substates. The diffusion constant D for the side chains is on the order of 10^{-6} cm ^2/sec.

Modern electronic and optoelectronic devices such as μ-processor, light emitting diode, semiconductor laser issued a challenge in the thermal dissipation problem. Finding an effective way for thermal dissipation therefore becomes a very important issue. It is known that carbon nanotubes (CNTs) is one of the most valuable materials with high thermal conductivity (2000 W/m.K compared to thermal conductivity of Ag 419 W/m.K). This suggested an approach in applying the CNTs as an essential component for thermal dissipation media to improve the performance of computer processor and other high power electronic devices. In this work multi walled carbon nanotubes (MWCNTs) based composites were utilized as the thermal dissipation media in a micro processor of a personal computer. The MWCNTs of different concentrations were added into polyaniline, commercial silicon thermal paste and commercial silver thermal paste by mechanical methods. A personal computer with configuration: Intel Pentium IV 3.066 GHz, 512 MB of RAM and Windows XP Service Pack 2 Operating System was employed. The thermal dissipation efficiency of the system was evaluated by directly measure the temperature of the μ-processor during the operation of the computer in different CPU speeds. The measured results showed that the CNTs based composite could reduce the temperature of the u-processor more than 5° C, and the time for increasing the temperature of the μ-processor was three times longer than that when using commercial thermal paste.