(A)Study on the embodiment of `intimacy` in performing arts centers

학위논문(박사)--서울대학교 대학원 :건축학과,2004.Docto

APPARATUS AND METHOD FOR MANAGING FTL

본 발명의 일 실시예에 따른 FTL(Flash Translation Layer) 관리 장치는, FTL을 관리하는 장치로서, 복수의 서브 데이터로 구성되는 타겟 데이터의 의존성을 확인하는 제 1 확인부; 상기 타겟 데이터의 평균 쓰기 데이터 크기를 확인하는 제 2 확인부; 및 병렬성 및 매핑 단위를 기준으로 상기 FTL이 구분되는 FTL 리스트로부터 상기 의존성 및 상기 평균 쓰기 데이터 크기 중 적어도 하나에 대응되는 FTL를 선택하는 선택부를 포함한다

subwavelength apertures, photonic crystal lasers, and microdisk lasers

학위논문(박사) - 한국과학기술원 : 물리학과, 2001.8, [ [iv], 114 p. ]We present experimental studies on small radiation sources such as subwavelength apertures, photonic crystal lasers, and microdisk lasers in their far- and near-field regimes. For the far-field characterization of highly divergent emissions, we develop a solid angle scanner which is capable of scanning a detector and necessary optics over the surface of a sphere centered at the sources. Polarization-resolved two-dimensional angular distributions are measured with this instrument. For the near-field characterization of subwavelength structures, we develop a near-field scanning optical microscope which scans a fiber probe over the source surface with shear-force distance regulation using dual tuning forks. Spectrally-resolved near-field images are measured with this instrument. In the studies on the subwavelength apertures, the far-field emissions are decomposed into low-order vector spherical waves. Based on the analyses, a general multipole model for NSOM probes is proposed. Moreover, we find that surface waves are excited at the aperture and propagate along a polarization direction. The surface waves menifest themselves as sidelobes and polarization-dependent fringes in near- and far-field regimes of the aperture on a corrugated plane. In the studies on the photonic crystal lasers, various lasing modes excited in the hexagonal cavities defined by two-dimensional photonic crystals are identified and classified into one- and two-dimensional modes. The one(two)-dimensional modes lase when the lattice constant is small(large). The polarization state of one-dimensional modes are found to be transverse-electric, while two-dimensional modes have various polarization states. We find that the lasing modes decay in a few peiods in the photonic crystal regions. In the studies on the microdisk lasers, the azimuthal mode number of a whispering-gallery mode is experimentally determined by counting the number of bright regions in the far-field emission pattern. The polari...한국과학기술원 : 물리학과