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기장근,노승환 公州大學校工科大學生産技術硏究所 1998 論文集 Vol.6 No.-
This paper presents the application scheme of distributed B-NT system. The distributed B-NT system consists of head node, ring network node, CANS(Centralized Access Node System) and HANS(Home ATM Node System). In this paper ATM cell transfer delay between subscribers, cell loss and cell transfer ratio of head node per each input port according to the various structures of B-NT system and change of input traffic are presented. The results of this paper will be used in constructing the optimized B-NT system.
기장근,노승환 公州大學校工科大學生産技術硏究所 1997 論文集 Vol.5 No.-
This paper presents development of a simulator in which ATM cell transmission delay time between subscribers, average queue length and cell loss of each system can be obtained according to the various structures of B-NT system and change of input traffic. The simulator consists of graphic user interface module, simulation program automatic generator module, B-NT system model library, etc. The results of simulation for the performance analysis of the B-NT system are also presented.
Creation of Magnetic Skyrmion Bubble Lattices by Ultrafast Laser in Ultrathin Films
Je, Soong-Geun,Vallobra, Pierre,Srivastava, Titiksha,Rojas-Sá,nchez, Juan-Carlos,Pham, Thai Ha,Hehn, Michel,Malinowski, Gregory,Baraduc, Claire,Auffret, Sté,phane,Gaudin, Gilles,Mangin, St American Chemical Society 2018 NANO LETTERS Vol.18 No.11
<P>Magnetic skyrmions are topologically nontrivial spin textures which hold great promise as stable information carriers in spintronic devices at the nanoscale. One of the major challenges for developing novel skyrmion-based memory and logic devices is fast and controlled creation of magnetic skyrmions at ambient conditions. Here we demonstrate controlled generation of skyrmion bubbles and skyrmion bubble lattices from a ferromagnetic state in sputtered ultrathin magnetic films at room temperature by a single ultrafast (35 fs) laser pulse. The skyrmion bubble density increases with the laser fluence, and it finally becomes saturated, forming disordered hexagonal lattices. Moreover, we present that the skyrmion bubble lattice configuration leads to enhanced topological stability as compared to isolated skyrmions, suggesting its promising use in data storage. Our findings shed light on the optical approach to the skyrmion bubble lattice in commonly accessible materials, paving the road toward the emerging skyrmion-based memory and synaptic devices.</P> [FIG OMISSION]</BR>