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Holographic dual of de Sitter universe with AdS bubbles
Kanno, S.,Sasaki, M.,Soda, J. North Holland 2012 Nuclear Physics, Section B Vol.855 No.2
We study the proposal that a de Sitter (dS) universe with an Anti-de Sitter (AdS) bubble can be replaced by a dS universe with a boundary CFT. To explore this duality, we consider incident gravitons coming from the dS universe through the bubble wall into the AdS bubble in the original picture. In the dual picture, this process has to be identified with the absorption of gravitons by CFT matter. We have obtained a general formula for the absorption probability in general d+1 spacetime dimensions. The result shows the different behavior depending on whether spacetime dimensions are even or odd. We find that the absorption process of gravitons from the dS universe by CFT matter is controlled by localized gravitons (massive bound state modes in the Kaluza-Klein decomposition) in the dS universe. The absorption probability is determined by the effective degrees of freedom of the CFT matter and the effective gravitational coupling constant which encodes information of localized gravitons. We speculate that the dual of (d+1)-dimensional dS universe with an AdS bubble is also dual to a d-dimensional dS universe with CFT matter.
Preparation and characterization of nano and microcrystalline ZnO thin films by PLD
S. Venkatachalam,Yoshinori Kanno 한국물리학회 2009 Current Applied Physics Vol.9 No.6
Nano and microcrystalline ZnO thin films were prepared on glass substrates using pulsed laser deposition technique under a vacuum of 3 × 10-7 Torr at different laser power density. Composition analyses show that the films deposited at low laser power density have more structural defects than the film deposited at high laser power density. It confirms that the content of Zn in free-state decreased greatly at high laser power density. Atomic force microscopy analysis shows that the surface roughness of the deposited films increases with an increase in laser power density. X-ray diffraction analyses show that all the films are oriented along (002) direction independently on the laser power density applied. The structural quality increases with an increase in laser power density. It is due to the fact that the increase of laser power density leads to the enhancement of peak intensity. The increase of laser power density reduces the film transmission in the visible range of the spectra. The optical band gap value is found to be in the range from 3.42 to 3.39 eV. It shows that the optical band gap value decreases with an increase in laser power density. FTIR analysis shows that the hydrated oxide content in the deposited films decreases with an increase in laser power density. Nano and microcrystalline ZnO thin films were prepared on glass substrates using pulsed laser deposition technique under a vacuum of 3 × 10-7 Torr at different laser power density. Composition analyses show that the films deposited at low laser power density have more structural defects than the film deposited at high laser power density. It confirms that the content of Zn in free-state decreased greatly at high laser power density. Atomic force microscopy analysis shows that the surface roughness of the deposited films increases with an increase in laser power density. X-ray diffraction analyses show that all the films are oriented along (002) direction independently on the laser power density applied. The structural quality increases with an increase in laser power density. It is due to the fact that the increase of laser power density leads to the enhancement of peak intensity. The increase of laser power density reduces the film transmission in the visible range of the spectra. The optical band gap value is found to be in the range from 3.42 to 3.39 eV. It shows that the optical band gap value decreases with an increase in laser power density. FTIR analysis shows that the hydrated oxide content in the deposited films decreases with an increase in laser power density.
유지방구막의 PAS-4 당단백질에 대한 단일항체의 생산에 관한 연구
황보식,( S . Hwangbo,C . Kanno ) 한국축산학회 1997 한국축산학회지 Vol.39 No.3
A myeloma cell was fused with the spleen cell from BALB/c mouse immunized against the purified PAS-4 to produce PAS-4 monoclonal antibody. Clones of hybridomas were screened for PAS-4 antibody using ELISA and immunoblotting. Hybridoma cells producing PAS-4 monoclonal antibody (KAS4) were injected intraperitoneally into BALB/c mouse for mass production of the monoclonal antibody, and 20 ㎎/mouse of the antibody were abtained. PAS-4 after hydrolysis with TFMS or N-glycanase was still strongly recognized by KAS4, indicating that the epitope of PAS-4 may be peptide. Protein A affinity chromatogaphy and SDS-PAGE analysis showed that KAS4 was immunoglobulin G (IgGI) class. Using KAS4 monoclonal antibody PAS-4 concentrations in milk were monitored by ELISA. PAS-4 concentration in milk at onset of parturition was 3 times higher than that in normal milk. However, the PAS-4 concentration was rapidly decreased at day 4 postparturition and then reached to the level observed in normal milk at day 7 post-parturition.