박장연 교수

8 mol %‐yttria‐stabilized zirconia (YSZ) thin films as an oxygen ion conductor were deposited by radio frequency magnetron sputtering, and the oxygen gas sensing properties of YSZ were investigated using the structure of substrate/Ni‐NiO/Pt/YSZ/Pt. X‐ray diffractometry was employed to study the structure of YSZ and Ni‐NiO films, and energy dispersion X‐ray was used to investigate the composition of Ni‐NiO thin films. The gas‐sensing test was carried out for a film structure exposed to oxygen‐con

Fe–Nb–B–N films with good soft magnetic properties were fabricated by Ar+N2 reactive sputtering. The quaternary films have better soft magnetic properties than that of Fe–Nb–B films. The best magnetic properties are saturation magnetization of 16.5 kG, coercivity of 0.13 Oe and effective permeability of about 5000 up to 10 MHz. It was observed by transmission electron microscopy that the Fe–Nb–B–N thin film annealed at 590 °C consisted of three phases: a fine α-Fe phase whose grain size is aroun

Three-dimensional ultrashort echo-time (UTE) imaging with radial k-space acquisition is a well-known MR imaging technique that generates comparable lung images to X-ray and computed tomography (CT). Although researchers have sought to minimize the incidence of motion artifacts, there is still a need to accomplish further reduction of motion artifacts through respiratory gating. In this study, we introduce a robust self-navigation for respiratory gating in 3D radial UTE lung imaging especially ba

STUDY DESIGN: Retrospective study. OBJECTIVE: To compare the predictive performance of three lordosis correction parameters for proximal junctional kyphosis (PJK) in adult spinal deformity (ASD) surgery. SUMMARY OF BACKGROUND DATA: Although the extent of lordosis correction, as measured by pelvic incidence minus lumbar lordosis (PI-LL), age-adjusted PI-LL, and L1PA, has been identified as a risk factor for PJK, direct comparison of their predictive ability has not been fully explored. METHODS: A

Purpose: Among RF pulses, a sinc pulse is typically used for slice selection due to itsfrequency-selective feature. When a sinc pulse is implemented in practice, it needs tobe apodized to avoid truncation artifacts at the expense of broadening the transitionregion of the excited-band profile. Here a sinc pulse tailored by a new apodizationfunction is proposed that produces a sharper transition region with well suppressionof truncation artifacts in comparison with conventional tailored sinc pulse