ENERGY SPECTRA OF COSMIC-RAY NUCLEI AT HIGH ENERGIES

Ahn, H. S.,Allison, P.,Bagliesi, M. G.,Barbier, L.,Beatty, J. J.,Bigongiari, G.,Brandt, T. J.,Childers, J. T.,Conklin, N. B.,Coutu, S.,DuVernois, M. A.,Ganel, O.,Han, J. H.,Jeon, J. A.,Kim, K. C.,Lee, IOP Publishing 2009 The Astrophysical journal Vol.707 No.1

<P>We present new measurements of the energy spectra of cosmic-ray (CR) nuclei from the second flight of the balloon-borne experiment Cosmic-Ray Energetics And Mass (CREAM). The instrument included different particle detectors to provide redundant charge identification and measure the energy of CRs up to several hundred TeV. The measured individual energy spectra of C, O, Ne, Mg, Si, and Fe are presented up to similar to 10(14) eV. The spectral shape looks nearly the same for these primary elements and it can be fitted to an E(-2.66 +/- 0.04)power law in energy. Moreover, a new measurement of the absolute intensity of nitrogen in the 100-800 GeV/n energy range with smaller errors than previous observations, clearly indicates a hardening of the spectrum at high energy. The relative abundance of N/O at the top of the atmosphere is measured to be 0.080 +/- 0.025 (stat.) +/- 0.025 (sys.) at similar to 800 GeV/n, in good agreement with a recent result from the first CREAM flight.</P>

Pesticidal Activity of Environment friendly agricultural materials(EFAMs)

Park J.H.,Han E.J.,Hong S.J.,Ahn N.H.,Kim Y.K.,Jee H.J. 한국유기농업학회 2011 韓國有機農業學會誌 Vol.19 No.S

Environment friendly agricultural material products (EFAMs) in current market were evaluated for their insecticidal or acaricidal activities. EFAMs were evaluated against Tetranychus urticae, Plutella xylostella, Myzus persicae and Nilaparvata lugens in spray method. Several EFAMs indicated high control value in spray method. Hatchability of T. urticae was relatively high after EFAM treatment. some materials show high insecticidal activities against P. xylostella larvae but not against eggs. Few meterials showed more than 80% insecticidal activities against M. persicae and N. lugen. The control value of more than half the materials for pest control was lower than 60%. EFAMs containing S. flavescens, neem oil and Rape showed higher control value

Effect of contrast-induced nephropathy on cardiac outcomes after use of nonionic isosmolar contrast media during coronary procedure

Cho, J.Y.,Jeong, M.H.,Hwan Park, S.,Kim, I.S.,Park, K.H.,Sim, D.S.,Yoon, N.S.,Yoon, H.J.,Park, H.W.,Hong, Y.J.,Kim, J.H.,Ahn, Y.,Cho, J.G.,Park, J.C.,Kang, J.C. Japanese College of Cardiology 2010 Journal of cardiology Vol.56 No.3

Contrast-induced nephropathy (CIN) has been increasing and seems to be associated with clinical outcomes in ischemic heart disease. This study aimed to assess the incidence, predictors, and cardiac outcomes of CIN when nonionic isosmolar contrast media (iodixanol, Visipaque<SUP>(</SUP>R), GE Healthcare, Cork, Ireland) was used. Between January 2005 and July 2008, 510 patients (69.2+/-9.0 years of age, 384 men) undergoing diagnostic coronary angiography (CAG) or percutaneous coronary intervention (PCI) were divided into two groups according to the development of CIN (CIN group: n=74; non-CIN group: n=436). CIN developed in 74 patients (14.5%). They were more likely to have diabetes (55.4% vs. 42.9%, p=0.045), decreased left ventricular ejection fraction (LVEF) (50.1+/-12.6% vs. 57.7+/-13.9%, p<0.001), and lower baseline hematocrit level (32.4+/-5.3% vs. 36.6+/-5.5%, p<0.001). Multiple logistic regression analysis revealed baseline hematocrit (odds ratio 0.900, 95% confidence interval 0.851-0.952, p<0.001), decreased LVEF (odds ratio 0.967, 95% confidence interval 0.949-0.986, p=0.001), and baseline creatinine level (odds ratio 2.317, 95% confidence interval 1.252-4.286, p=0.007) as independent predictors of CIN. At 1-year follow-up, patients with CIN were found to have more adverse outcomes than without CIN in Cox proportional hazards analysis (hazard ratio 13.068, 95% confidence interval 2.425-70.434, p=0.003). CIN was mostly associated with baseline creatinine level rather than CM amount using nonionic isosmolar CM. We found that patients with CIN had worse event-free survival than patients without CIN after multifactorial adjustment.

Age-related differences in virtual histology-intravascular ultrasound findings in patients with coronary artery disease

Hong, Y.J.,Jeong, M.H.,Choi, Y.H.,Ma, E.H.,Ko, J.S.,Lee, M.G.,Park, K.H.,Sim, D.S.,Yoon, N.S.,Youn, H.J.,Kim, K.H.,Park, H.W.,Kim, J.H.,Ahn, Y.,Cho, J.G.,Park, J.C.,Kang, J.C. Japanese College of Cardiology 2010 Journal of cardiology Vol.55 No.2

Background: We assessed the age-related differences in pre-intervention virtual histology-intravascular ultrasound (VH-IVUS) findings at target lesion sites in patients with coronary artery disease. Methods: A total of 553 patients who underwent pre-intervention VH-IVUS imaging were grouped according to age: non-elderly (@?70 years, n=429) and elderly (>70 years, n=124); 191 had stable angina and 362 acute coronary syndrome. VH-IVUS classified the tissue into: fibrotic, fibro-fatty, dense calcium (DC), and necrotic core (NC). Results: Overall, the absolute and percent volumes of DC (11.0+/-11.0mm<SUP>3</SUP> vs. 9.7+/-11.9mm<SUP>3</SUP>, P=0.033; 11.7+/-8.1% vs. 9.8+/-7.2%, P=0.014, respectively) and NC (18.5+/-17.6mm<SUP>3</SUP> vs. 16.6+/-18.9mm<SUP>3</SUP>, P=0.020; 18.8+/-8.8% vs. 16.5+/-9.3%, P=0.026, respectively) were significantly greater in the elderly than in the non-elderly. In stable angina patients, the absolute and percent volumes of DC (10.4+/-9.9mm<SUP>3</SUP> vs. 7.2+/-7.6mm<SUP>3</SUP>, P=0.022; 13.4+/-10.0% vs. 9.2+/-6.5%, P=0.011, respectively) and NC (14.8+/-11.2mm<SUP>3</SUP> vs. 12.0+/-11.9mm<SUP>3</SUP>, P=0.035; 19.6+/-8.8% vs. 15.5+/-8.4%, P=0.006, respectively) were significantly greater in the elderly. However, in acute coronary syndrome patients, there were no significant differences in absolute and percent volumes of DC (11.4+/-11.6mm<SUP>3</SUP> vs. 10.9+/-13.4mm<SUP>3</SUP>, P=0.8; 10.7+/-6.5% vs. 10.1+/-7.5%, P=0.5, respectively) and NC (24.1+/-20.3mm<SUP>3</SUP> vs. 23.9+/-21.2mm<SUP>3</SUP>, P=0.9; 22.0+/-8.8% vs. 21.3+/-9.6%, P=0.6, respectively) between the elderly and non-elderly groups. Myocardial infarction (OR: 2.56, 95% CI: 1.45-4.12, P=0.003), diabetes mellitus (OR: 2.23, 95% CI: 1.30-3.53, P=0.009), and high-sensitivity C-reactive protein (OR: 1.44, 95% CI: 1.06-2.45, P=0.042), but not age, were independent predictors of percent NC volume >20% in lesion site. Conclusions: Myocardial infarction, diabetes mellitus, and high-sensitivity C-reactive protein, but not age, were associated with NC-rich lesions. Clinical presentation, risk factors, and inflammatory status, but not age, are important factors for plaque components.

발효처리된 우모분이 쥐의 생체내 아미노산 이용물에 미치는 영향

이남형(N . H . Lee),김영붕(Y . B . Kim),김희주(H . J . Kim),성기승(K . S . Seong),노정해(J . H . Rho),한찬규(C . K . Han),안철(C . Ahn) 한국영양사료학회 1999 韓國營養飼料學會誌 Vol.23 No.1

N/A

J/ψ production as a function of charged particle multiplicity in pp collisions at s =7 TeV

ALICE Collaboration,Abelev, B.,Adam, J.,Adamova, D.,Adare, A.M.,Aggarwal, M.M.,Aglieri Rinella, G.,Agocs, A.G.,Agostinelli, A.,Aguilar Salazar, S.,Ahammed, Z.,Ahmad Masoodi, A.,Ahmad, N.,Ahn, S.U.,Aki North-Holland Pub. Co 2012 Physics letters: B Vol.712 No.3

The ALICE Collaboration reports the measurement of the relative J/ψ yield as a function of charged particle pseudorapidity density dN<SUB>ch</SUB>/dη in pp collisions at s=7 TeV at the LHC. J/ψ particles are detected for p<SUB>t</SUB>>0, in the rapidity interval |y|<0.9 via decay into e<SUP>+</SUP>e<SUP>-</SUP>, and in the interval 2.5<y<4.0 via decay into μ<SUP>+</SUP>μ<SUP>-</SUP> pairs. An approximately linear increase of the J/ψ yields normalized to their event average (dN<SUB>J/ψ</SUB>/dy)/<dN<SUB>J/ψ</SUB>/dy> with (dN<SUB>ch</SUB>/dη)/<dN<SUB>ch</SUB>/dη> is observed in both rapidity ranges, where dN<SUB>ch</SUB>/dη is measured within |η|<1 and p<SUB>t</SUB>>0. In the highest multiplicity interval with <dN<SUB>ch</SUB>/dη(bin)≥24.1, corresponding to four times the minimum bias multiplicity density, an enhancement relative to the minimum bias J/ψ yield by a factor of about 5 at 2.5<y<4 (8 at |y|<0.9) is observed.

White-light-emitting devices based on Organic multilayer structure

J.T.Lim,N.H.Lee,Y.J.Ahn,G.W.Kang,이창희 한국물리학회 2002 Current Applied Physics Vol.2 No.4

We report an efficient white-light-emitting devices using vacuum-deposited film of a hole-transporting layer of 4,40bis[N-(1- napthyl)-N-phenyl-amino]-biphenyl (a-NPD), a bluish-green emitting layer of bis[2-(2-hydroxyphenyl)benzothiazolate] zinc, a Zn(BTZ)2, Zn(BTZ)2 doped with a red fluorescent dye of 4-dicyanomethylene-2-methyl-6-[2-(2,3,6,7-tetrahydro-1H,5H-benzo- [i,j]quinolizin-8-yl)vinyl]-4H-pyran (DCM2), and an electron-transporting layer of tris(8-hydroxyquinoline) aluminum (Alq3). The incomplete energy transfer from Zn(BTZ)2 to DCM2 results in the emission of two complementary colors (blue and orange). Controlling the thickness of a Zn(BTZ)2 layer which acts as a bluish-green emitter and a hole blocking layer and the concentration of DCM2 enables tailoring of the spectral output of the device to have a balanced white emission. A device with the structure of ITO/a-NPD (50 nm)/Zn(BTZ)2 (4 nm)/Zn(BTZ)2:DCM2 (10 nm, 0.8%)/Alq3 (30 nm)/LiF(0.5 nm)/Al shows an external quantum efficiency (QE) of about 0.5%, a luminous efficiency of 0.27 lm/W, and the CIE chromaticity coordinates of (0.36, 0.33) at luminance 100 cd/m2. 2002 Elsevier Science B.V. All rights reserved. We report an efficient white-light-emitting devices using vacuum-deposited film of a hole-transporting layer of 4,40bis[N-(1- napthyl)-N-phenyl-amino]-biphenyl (a-NPD), a bluish-green emitting layer of bis[2-(2-hydroxyphenyl)benzothiazolate] zinc, a Zn(BTZ)2, Zn(BTZ)2 doped with a red fluorescent dye of 4-dicyanomethylene-2-methyl-6-[2-(2,3,6,7-tetrahydro-1H,5H-benzo- [i,j]quinolizin-8-yl)vinyl]-4H-pyran (DCM2), and an electron-transporting layer of tris(8-hydroxyquinoline) aluminum (Alq3). The incomplete energy transfer from Zn(BTZ)2 to DCM2 results in the emission of two complementary colors (blue and orange). Controlling the thickness of a Zn(BTZ)2 layer which acts as a bluish-green emitter and a hole blocking layer and the concentration of DCM2 enables tailoring of the spectral output of the device to have a balanced white emission. A device with the structure of ITO/a-NPD (50 nm)/Zn(BTZ)2 (4 nm)/Zn(BTZ)2:DCM2 (10 nm, 0.8%)/Alq3 (30 nm)/LiF(0.5 nm)/Al shows an external quantum efficiency (QE) of about 0.5%, a luminous efficiency of 0.27 lm/W, and the CIE chromaticity coordinates of (0.36, 0.33) at luminance 100 cd/m2. 2002 Elsevier Science B.V. All rights reserved.

MEASUREMENTS OF THE RELATIVE ABUNDANCES OF HIGH-ENERGY COSMIC-RAY NUCLEI IN THE TeV/NUCLEON REGION

Ahn, H. S.,Allison, P. S.,Bagliesi, M. G.,Barbier, L.,Beatty, J. J.,Bigongiari, G.,Brandt, T. J.,Childers, J. T.,Conklin, N. B.,Coutu, S.,DuVernois, M. A.,Ganel, O.,Han, J. H.,Jeon, J. A.,Kim, K. C.,L IOP Publishing 2010 The Astrophysical journal Vol.715 No.2

<P>We present measurements of the relative abundances of cosmic-ray nuclei in the energy range of 500-3980 GeV/nucleon from the second flight of the Cosmic Ray Energetics And Mass balloon-borne experiment. Particle energy was determined using a sampling tungsten/scintillating-fiber calorimeter, while particle charge was identified precisely with a dual-layer silicon charge detector installed for this flight. The resulting element ratios C/O, N/O, Ne/O, Mg/O, Si/O, and Fe/O at the top of atmosphere are 0.919 +/- 0.123(stat) +/- 0.030(syst), 0.076 +/- 0.019(stat) +/- 0.013(syst), 0.115 +/- 0.031(stat) +/- 0.004(syst), 0.153 +/- 0.039(stat) +/- 0.005(syst), 0.180 +/- 0.045(stat) +/- 0.006(syst), and 0.139 +/- 0.043(stat) +/- 0.005(syst), respectively, which agree with measurements at lower energies. The source abundance of N/O is found to be 0.054 +/- 0.013(stat) +/- 0.009(-0.017)(syst+0.010esc). The cosmic-ray source abundances are compared to local Galactic (LG) abundances as a function of first ionization potential and as a function of condensation temperature. At high energies the trend that the cosmic-ray source abundances at large ionization potential or low condensation temperature are suppressed compared to their LG abundances continues. Therefore, the injection mechanism must be the same at TeV/nucleon energies as at the lower energies measured by HEAO-3, CRN, and TRACER. Furthermore, the cosmic-ray source abundances are compared to a mixture of 80% solar system abundances and 20% massive stellar outflow (MSO) as a function of atomic mass. The good agreement with TIGER measurements at lower energies confirms the existence of a substantial fraction of MSO material required in the similar to TeV per nucleon region.</P>

케블라 / 에폭시 프리프레그의 경화특성에 관한 연구

제갈영순(Y . S . Gal),이원철(W . C . Lee),권오혁(O . H . Kwon),윤남균(N . G . Yoon),임길수(K . S . Lhim),안종기(J . K . Ahn),박경준(K . J . Park) 한국복합재료학회 2001 Composites research Vol.14 No.2

N/A N/A

J/ψ Elliptic Flow in Pb-Pb Collisions at sNN=5.02 TeV

Acharya, S.,Adamová,, D.,Adolfsson, J.,Aggarwal, M. M.,Aglieri Rinella, G.,Agnello, M.,Agrawal, N.,Ahammed, Z.,Ahn, S. U.,Aiola, S.,Akindinov, A.,Al-Turany, M.,Alam, S. N.,Albuquerque, D. S. D. American Physical Society 2017 Physical Review Letters Vol.119 No.24

<P>We report a precise measurement of the J/psi elliptic flow in Pb-Pb collisions at root s(NN) = 5.02 TeV with the ALICE detector at the LHC. The J/psi mesons are reconstructed at midrapidity (|y| < 0.9) in the dielectron decay channel and at forward rapidity (2.5 < y < 4.0) in the dimuon channel, both down to zero transverse momentum. At forward rapidity, the elliptic flow v(2) of the J/psi is studied as a function of the transverse momentum and centrality. A positive v(2) is observed in the transverse momentum range 2<p(T)<8GeV/c in the three centrality classes studied and confirms with higher statistics our earlier results at root s(NN) = 2.76 TeV in semicentral collisions. At midrapidity, the J/psi v(2) is investigated as a function of the transverse momentum in semicentral collisions and found to be in agreement with the measurements at forward rapidity. These results are compared to transport model calculations. The comparison supports the idea that at low p(T) the elliptic flow of the J/psi originates from the thermalization of charm quarks in the deconfined medium but suggests that additional mechanisms might be missing in the models.</P>