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An Experimental Study on the Improvement of Aerodynamic Characteristics Using the Blowing for RLV
Shigeki TSUCHIYA,Shigeru ASO,Yasuhiro TANI 한국항공우주학회 2008 한국항공우주학회 학술발표회 논문집 Vol.- No.-
To improve the aerodynamic characteristics of Reusable Launch Vehicles (RLV), active flow control methods with blowing were investigated. The testing models are wing body and lifting body contigurations. The experiments have been conducted in low-speed wind tunnels of Kyushu University and transonic wind tunnel of ISAS (Institute of Space and Astronautical Science), JAXA (Japan Aerospace Exploration Agency). For the active flow control, the blowing along the fuselage surface was chosen. Flow visualization results show that the vortex on the fuselage is greatly moved near the fuselage, and the vortex core of the wing is clearly observed. The aerodynamic characteristics result shows that the blowing increases the lift and lift-to-drag ratio. From those results, we confirmed that the blowing can be useful for the improvement of aerodynamic characteristics of the RLV.
조은경,Kumaki Satoru,Du Wei,Tsuchiya Shigeru,Kanegane Hirokazu,송창화,Noh Ha Young,Kim Young Ok,Kim So Yeon,Chung Hae Yul,김윤하,국훈 대한의학회 2004 Journal of Korean medical science Vol.19 No.1
X-linked severe combined immunodeficiency (X-SCID) is a rare, life-threatening immune disorder, caused by mutations in the c chain gene, which encodes an essen-tial component of the cytokine receptors for interleukin-2 (IL-2), IL-4, IL-7, IL-9, IL-15, and IL-21. A 13-month-old boy with recurrent infections who had reduced serum immunoglobulin levels and decreased numbers of CD3, CD16/56 cells was evalu-ated for c chain gene mutation and protein expression. The patient had a C-to-T point mutation at nucleotide position 690, one of the hot spots, resulting in a single amino acid substitution of cysteine for arginine (R226C), as determined by direct sequencing and PCR-RFLP. The patient’s mother was a heterozygous carrier. Per-cutaneous umbilical cord blood sampling was performed at the 6-month of gesta-tion in a subsequent pregnancy. As the immunophenotype of the fetus showed an identical pattern, the pregnancy was terminated and genetic analysis of the abortus confirmed recurrence. This is the first report of the molecular diagnosis of X-SCID in Korea. Genetic analysis of the c chain gene is useful for definite diagnosis and genetic counseling for X-SCID.
C60(OH)n-ASSISTED DISPERSION OF SINGLE-WALLED CARBON NANOTUBES
YUTAKA MAEDA,TAKAAKI KATO,JUNKI HIGO,TADASHI HASEGAWA,TAKAHIRO KITANO,TAKAHIRO TSUCHIYA,TAKESHI AKASAKA,TOSHIYA OKAZAKI,JING LU,SHIGERU NAGASE 성균관대학교(자연과학캠퍼스) 성균나노과학기술원 2008 NANO Vol.3 No.6
We demonstrate that C60(OH)n-assists the dispersion of SWNTs in aqueous and nonaqueous solutions, which effectively exfoliates large-diameter SWNTs. The SWNT dispersions are characterized by absorption and photoluminescence spectra.
TADASHI HASEGAWA,TAKESHI AKASAKA,YUTAKA MAEDA,MASAHIRO HASHIMOTO,MAKOTO KANDA,TAKAHIRO TSUCHIYA,TAKATSUGU WAKAHARA,YUHEI MIYAUCHI,SHIGEO MARUYAMA,JING LU,SHIGERU NAGASE 성균관대학교(자연과학캠퍼스) 성균나노과학기술원 2007 NANO Vol.2 No.4
Single-walled carbon nanotubes (SWNTs) synthesized by catalytic decomposition of an alcohol were purified by extraction. The purified SWNTs were characterized on the basis of visible-near infrared (vis-NIR) absorption, photoluminescence and Raman spectroscopic analyses, scanning electron microscopy (SEM) observation, and thermal analysis. Selective extraction of metallic nanotubes was also achieved by the extraction condition.