Dynamical features of deoxyribonucleic acid and configuration transition in the transcription process

10.1088/0953-8984/18/39/029Journal of Physics Condensed Matter18399007-9030JCOM

Characteristic of low and middle frequency underwater noise of a catamaran

This paper examines the characteristic of low and middle frequency underwater noise of a catamaran. Based on acoustic-structure coupling method, the low and middle frequency underwater noise radiation prediction model of a twin-hull craft is established. The underwater noise radiations excited by both the monohulland double hulls are studied, respectively. Calculation method of underwater noise of twin-hull craft is also discussed. Study shows that the behaviours of underwater noise radiation of a catamaran is quite different from a single hull ship. Due to the existence of free surface and twin hulls of the craft, the underwater sound radiation varies especially in the near field -. The sound directivity changes severely when standing wave appears between the region of twin hulls if the distance of bilateral hulls and sound wave length satisfies certain conditions at certain frequencies. However, if the standing wave effects do not occur between twin hulls the principle of linear superposition is approximately satisfied

Proton–neutron asymmetry independence of reduced single-particle strengths derived from (p,d) reactions

An overall reduction factor (ORF) is introduced for studying the quenching of single-particle strengths through nucleon transfer reactions. The ORF includes contributions of all the probed bound states of the residual nucleus in a transfer reaction and permits a proper comparison with results of inclusive knockout reactions. A systematic analysis is made with 103 sets of angular distribution data of (p,d) reactions on 21 even–even targets with atomic mass numbers from 8 to 56 using the consistent three-body model reaction methodology proposed in Lee et al. (2006) [25]. The extracted ORFs are found to be nearly independent on the proton–neutron asymmetry, which is different from the systematics of inclusive knockout reactions but is consistent with the recent measurement of (d,t), (d,He3), (p,2p), and (p,pn) reactions on nitrogen and oxygen isotopes and ab initio calculations. Keywords: (p,d) reactions, Spectroscopic factors, Quenching factors, Reduced single-particle strengt

Approach to interface roughness of silicide thin films by micro-Raman imaging

10.1116/1.1868646Journal of Vacuum Science and Technology B: Microelectronics and Nanometer Structures232468-474JVTB