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        검색결과 11

        1.
        2025.01 KCI 등재 SCOPUS 구독 인증기관 무료, 개인회원 유료
        We present the combined 2.5–30 μm spectra of four protostars acquired with the infrared camera and the infrared spectrograph on board the AKARI and Spitzer space telescopes, respectively. To analyze the ice absorption features in the 8–22 μm, we first performed a continuum determination process on mid-infrared spectra and applied a method to subtract the silicate absorption. We conducted a global fitting process to the absorption features in the combined infrared spectra using the experimental ice absorbance data to identify the intrinsic absorption of each ice component. We first derived the H2O ice column densities of both stretch and libration modes at 3.05 μm and 13.6 μm simultaneously. We also identified the absorption features containing NH3, CH3OH, CO2, and CO and decomposed their mixed components and compared their ice abundances at different evolutionary stages of the protostars. We explored possible absorptions of the organic ice species such as HCOOH, CH3CHO, and CH3CH2OH in the mid-infrared ranges. The ice analysis method developed in this study can be applied to the ice spectra obtained by the James Webb Space Telescope.
        5,400원
        9.
        2017.08 KCI 등재 구독 인증기관 무료, 개인회원 유료
        Neurilemmomas, also known as schwannomas, are typically benign, well-encapsulated, slow-growing tumors originating from Schwann cells which encompass peripheral motor and sensory nerves. Neurilemmomas in parapharyngeal space (PPS) are very rare, but they can occasionally originate from the last four cranial nerves and autonomic nerves. In this article, we report the rare case of a 47-year-old male presenting solitary neck swelling and hoarseness. After computed tomography and magnetic resonance imaging, we performed complete surgical excision by a transcervical approach under general anesthesia. In the histologic examination, Neurilemmoma was diagnosed. The patient did not complain of any specific complications, showed good prognosis without recurrence or pain up to date.
        4,000원
        11.
        2003.08 KCI 등재 서비스 종료(열람 제한)
        As the competition in the liner shipping industry is becoming fiercer, the shipping company is trying to find the way to keep the best competitive position by reducing the cost level as low as possible and offering the best quality of service to their customer. In order to achieve this goal, the selection of port and terminal that have the best quality of service and cost effective structure is essential for the shipping line, where they can only have a chance to save the money. In this context, the paper compares three European container terminals in order to understand the factors that have to be considered in the decision making process for the selection of terminal. And its advantages and disadvantages of each type of container terminal operation system were analyzed from the liner shipping company's point of view in terms of cost, time, flexibility, stability, hinterland connection, geographical position and terminal productivity. It is obvious that the cost factors are very important for liner shipping company to select their terminal. However, there might be even more important factors than the cost factors, such as quality of port and terminal service, mutual trust, and possibility of future development.