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Nakayama, S.,Mauger, C.,Ahn, M.H.,Aoki, S.,Ashie, Y.,Bhang, H.,Boyd, S.,Casper, D.,Choi, J.H.,Fukuda, S.,Fukuda, Y.,Gran, R.,Hara, T.,Hasegawa, M.,Hasegawa, T.,Hayashi, K.,Hayato, Y.,Hill, J.,Ichikawa Elsevier 2005 Physics letters: B Vol.619 No.3
<P><B>Abstract</B></P><P>Neutral current single <SUP>π0</SUP> production induced by neutrinos with a mean energy of 1.3 GeV is measured using a 1000 ton water Cherenkov detector in the K2K long baseline neutrino experiment. The cross section for this process relative to the total charged current cross section is measured to be 0.064±0.001(stat.)±0.007(sys.). The momentum distribution of neutral current <SUP>π0</SUP>s from a water target is measured with high statistics for the first time.</P>
Gorby, Y. A.,Yanina, S.,McLean, J. S.,Rosso, K. M.,Moyles, D.,Dohnalkova, A.,Beveridge, T. J.,Chang, I. S.,Kim, B. H.,Kim, K. S.,Culley, D. E.,Reed, S. B.,Romine, M. F.,Saffarini, D. A.,Hill, E. A.,Sh Proceedings of the National Academy of Sciences 2006 PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF Vol.103 No.30
<P>Shewanella oneidensis MR-1 produced electrically conductive pilus-like appendages called bacterial nanowires in direct response to electron-acceptor limitation. Mutants deficient in genes for c-type decaheme cytochromes MtrC and OmcA, and those that lacked a functional Type II secretion pathway displayed nanowires that were poorly conductive. These mutants were also deficient in their ability to reduce hydrous ferric oxide and in their ability to generate current in a microbial fuel cell. Nanowires produced by the oxygenic phototrophic cyanobacterium Synechocystis PCC6803 and the thermophilic, fermentative bacterium Pelotomaculum thermopropionicum reveal that electrically conductive appendages are not exclusive to dissimilatory metal-reducing bacteria and may, in fact, represent a common bacterial strategy for efficient electron transfer and energy distribution.</P>
Toroidal rotation profile structure in KSTAR L-mode plasmas with mixed heating by NBI and ECH
Shi, Y.J.,Ko, S.H.,Kwon, J.M.,Ko, W.H.,Diamond, P.H.,Yi, S.,Ida, K.,Lee, K.D.,Jeong, J.H.,Seo, S.H.,Hahn, S.H.,Yoon, S.W.,Bae, Y.S.,Terzolo, L.,Yun, G.S.,Bitter, M.,Hill, K. IOP 2016 Nuclear fusion Vol.56 No.1
<P>The structure of the toroidal rotation profile with mixed heating by neutral beam injection (NBI) and electron cyclotron resonance heating (ECH) has been investigated in KSTAR L-mode plasmas. ECH with varying resonance layer positions was used for heating a mix control. The experimental results show that ECH causes a counter-current rotation increment both for off-axis and on-axis ECH heating. For L-mode plasmas, off-axis ECH produces larger counter-current rotation than on-axis ECH. Analysis of ion heat and momentum transport for the ECH L-mode plasmas shows that the electron temperature gradient is the main reason for the degradation of ion heat confinement and also the main driving force for the non-diffusive momentum flux. As a possible mechanism for the counter-current intrinsic torque with ECH, the transition of the turbulence mode from ion temperature gradient (ITG) to the trapped electron mode (TEM) with the resulting sign change of turbulence driven residual stress is suggested. A linear gyro-kinetic analysis shows the ITG → TEM transition occurs in a localized region during ECH injection, and the trend of TEM excitation is consistent with the observed macroscopic trend of the toroidal rotation.</P>
Directional solidification by the skull melting in the $YO_{1.5}-BaO-CuO$ system
정용선,Chung, Yong S.,Hill, D. Norman The Korea Association of Crystal Growth 1994 한국결정성장학회지 Vol.4 No.2
$YBa_2Cu_3O_X$상 부근의 3가지 조성을 skull melting 방법으로 4MHz에서 녹인 후 방향적 결정성장을 시켰다. 일반적인 무기재료 공정방법으로 처리된 분말을 skull에 넣은 후 $1200^{\circ}C$부근에서 용융시켰다. 사용한 성장속도는 4~0.25 cm/hr이었으며, 금속현미경, X-선 회절기, EDX 등을 이용해서 제조된 시편을 조사하여 사용한 분말의 조성에 따른 시편의 미세조직의 변화를 관찰하였다. $YBa_2Cu_7O_X$와 $YBa_5Cu_{11}O_X$ 시편의 대표적인 미세조직은 성장방향으로 자라난 침상형태의 $YBa_2Cu_3O_X$와 $Y_2BaCuO_5$ 상이 $CuO-BaCuO_2$의 공융 조직상 사이에 생성된 것으로 나타났다. Three composition in the system of $YO_{1.5}-BaO-CuO$ were grown using a cold crucible (skull) melting technique with a 50 kW R.F. induction generator operating at 4 MHz as the power source. The starting materials were prepared by conventional ceramic powder processing methods, loaded into the skull, and melted at about $1200^{\circ}C$. For this study, compositions near the $YBa_2Cu_3O_X$ region were selected. The growth rates used ranged from 4 cm/hr to 0.25 cm/hr. The relation between the microstructures and the starting composition of each ingot was determined using metallograph, X-ray diffraction, and energy dispersive X-ray analysis. Both $YBa_2Cu_3O_X$ and $Y_2BaCuO_5$ needle-shaped crystals, aligned with the growth direction, were formed in the $CuO-BaCuO_2$ eutectic matrix of the $YBa_2Cu_7O_x and YBa_5Cu_{11}O_x$ ingot.
P. J. Welz,J. -B. Ramond,D. A. Cowan,S. G. Burton,M. le Roes-Hill 한국생물공학회 2014 Biotechnology and Bioprocess Engineering Vol.19 No.2
The formation of environmentally toxic acidicwaste from mining activities is a world-wide problem. Neutralization of this waste can be accomplished byphysicochemical and/or biological means. In this shorttermstudy, synthetic acid mine drainage was added tosand-filled mesocosms containing silica-dominated (quartz)sand. Glucose was added as a carbon source for microbialiron and/or sulphate reduction. Replicates contained twoseparate batches of sand obtained from the same quarrysite. The investigations used to assess and compare thechemical and biological functioning of the replicatesincluded system hydraulic conductivity measurements, sandchemistry, effluent chemistry and bacterial communityfingerprinting. Minor differences in composition of thesand, including the levels of available nutrients andmicronutrients, resulted in major differences in measuredparameters. Significant differences in effluent chemistrywere found in systems containing different batches of sand. It was demonstrated that the characteristics of the sand andthe presence of acid mine drainage (AMD) impacted thebacterial community structure and function. The importanceof the physical substrate on the selection of functionalmicrobial communities in systems remediating AMD shouldnot be under-estimated. The physical substrate should becarefully selected and it may be prudent to include smallscalecomparative studies in each particular setting prior tofull-scale implementation.
The earliest phases of high-mass star formation, as seen in NGC 6334 by <i>Herschel</i>-HOBYS
Tigé,, J.,Motte, F.,Russeil, D.,Zavagno, A.,Hennemann, M.,Schneider, N.,Hill, T.,Nguyen Luong, Q.,Di Francesco, J.,Bontemps, S.,Louvet, F.,Didelon, P.,Kö,nyves, V.,André,, Ph.,Leuleu, Springer-Verlag 2017 Astronomy and astrophysics Vol.602 No.-