표면전하의 거동을 고려한 유전체 장벽 방전의 수치 해석

Thesis (master`s)--서울대학교 대학원 :원자핵공학과,2002.Maste

h Spring Steels

Maste

Music and Lyrics: Musical Training for Aural Rehabilitation

Music and Lyrics: Musical Training for Aural Rehabilitatio

역동적 공간 개념을 통한 스마트 오피스 디자인 - 디지털 트윈 시스템의 시뮬레이션을 이용하여 -

(Background and Purpose) In the era of the Fourth Industrial Revolution, space transcends the constraints of space and time, connecting in real-time and facilitating communication, Physical space in the real world interacts dynamically with complex networks of human beings, objects, and surrounding environments, expanding into virtual realms. In the field of spatial design, it leaps forward as a space of continuous transformation with a life of its own, in response to these trends. Various systems are being developed as technical solutions to bridge the virtual and physical domains, with the concept of the "digital twin" gaining traction across various fields. This research aims to harness the advantages of dynamic, evolving digital twins that independently convey complex information from real-world spaces and analyze it in real-time, and offer innovative solutions for spatial forms. Furthermore, it addresses practical issues with dynamic spaces and presents the potential to predict and enhance spaces in the near future. (Method) First, this research explores the concept of dynamism and key approaches through literature review. It also investigates the concept and trends of digital twins, comparing and analyzing their relationship with the concept of dynamism in order to extract common characteristics. Second, it diagrams the physical and virtual strategies for space design, differentiating between hardware and software strategies required for design conceptualization. Third, it employs concepts and trends related to modern smart office spaces optimized for these strategies to create actual spatial works integrating digital twin systems. (Results) The research devised unit structures, rals, and vertical mobility structures to impart mobility and dynamism to the physical structure. These structures allowed the real-time collection of cluster information based on the organization's complex and organic work patterns, resulting in diverse forms. Leveraging digital twins, the system could actively adjust positions based on user behavior, maximizing creative communication in highly connected spaces. Ultimately, the hardware and software designs not only improved the efficiency of office spaces but also promoted creative and organic communication. (Conclusions) This research offers a case study of a space that goes beyond a simple description of dynamic space in terms of form and appearance, emphasizing its inherent adaptability and evolution. Also, it proposes an ambivalent direction and solution both morphological and systematic aspects simultaneously. As a result, it presents the potential for the commercialization of dynamic spaces through digital twins and their contribution to the interconnection and progress of generative spaces linking users, objects, space, and the surrounding environment in various ways.N

Fabrication of MgO nanoparticles embedded colorless polyimide film as encapsulation and it’s multi-stacking passivation film

본 발명은 산화마그네슘 나노입자들이 균일하게 내장된 무색 투명 폴리이미드 필름층을 포함하는 유연 투명 보호막에 관한 것이다. 투명 폴리이미드는 내구성이 매우 우수하여 외부의 환경으로부터 유연소자를 보호 할 수 있고, 투명한 유연기판 제공에 매우 적합한 소재이다. 특히 폴리이미드 내부에 수분과의 상호작용으로 수분을 효과적으로 차단 할 수 있는 산화물 나노입자를 균일하게 내장시켜 줌으로써, 우수한 보호막 특성을 구현할 수 있다. 산화물 나노입자가 내장된 폴리이미드 복합체 막의 상층에 무기물 박막을 추가적으로 더 적층할 수 있으며, 특히 산화마그네슘-폴리이미드 복합체막/무기 박막/산화마그네슘-폴리이미드 복합체 막이 연속적으로 코팅된 복수의 적층 구조를 형성하여 우수한 보호막 필름 소재로 사용될 수 있다

Can temporal bone magnetic resonance imaging estimate the prognosis of idiopathic facial palsy?

Background: In facial palsy patients, electroneuronography (ENoG) was used for the diagnosis of the prognosis of facial palsy. This study aimed to determine whether temporal bone magnetic reso-nance imaging (TBMR) was useful for diagnosing and predicting prognosis in facial palsy. Materials and Methods: Among the patients diagnosed with facial palsy, 112 patients who underwent TBMR were included. These patients were divided into three groups according to the enhancement region of the facial nerve in TBMR. Fifty-five patients showed contrast enhancement in the meatal or labyrinthine segment (group 1), 36 patients showed enhancement in the geniculate ganglion (group 2), and 21 patients showed enhancement in the tympanic or mastoid segment (group 3). The initial facial palsy symptoms and prognosis were compared between the three groups. Results: In group 1, 26 patients showed House-Brackmann grade (H-B grade) IV, V initially, and 13 patients and 12 patients showed H-B grade IV, V initially in group 2 and group 3, respectively. Moreover, the initial ENoG results (%) between the three groups did not significantly differ. Patients who took more than 6 months to recover after systemic steroid therapy were 5 patients in group 1, 3 patients in group 2, and 2 patients in group 3. Conclusions: In TBMR of the patients with facial nerve palsy, the most contrast enhancement parts of the facial nerve were the meatal and labyrinthine segments. Enhancement of those segments showed severe initial symptoms clinically. In addition, most of them recovered within 6 months. However, there was no statistical significance, so further studies are needed for more cases and ob-servation periods

High-frequency Cochlear Nerve Deficit Region: Relationship With Deaf Duration and Cochlear Implantation Performance in Postlingual Deaf Adults

Objective: To analyze the changes of cochlear nerve diameter and the presence of a cochlear nerve deficit at a high-frequency region and investigate their effects on cochlear implant (CI) performance in postlingual deaf adults. Study Design: Retrospective. Setting: Tertiary care academic center. Patients: Eighty-three postlingual deaf adults with no labyrinthine anomalies or cognitive deficits who received a CI with perimodiolar electrodes from a single manufacturer. Main Outcomes and Measures: We evaluated the changes of cochlear nerve diameter and the presence of a "tail sign," defined as identifiable nerve fibers originating from the far basal turn of the cochlea, which represents the presence of cochlear nerve at a high-frequency region in magnetic resonance imaging, on monosyllabic word recognition scores. Results: The cochlear nerve diameter showed a positive correlation with word recognition scores (maximum diameter, R-2 = 0.26, p < 0.01; minimum diameter, R-2 = 0.26, p < 0.01), but a negative correlation with deaf duration. Recipients with a positive tail sign performed better (73 +/- 19%) than those without (45 +/- 24%, p < 0.01). A positive tail sign was more commonly found in good performers (52 of 62, 84%) than in poor performers (5 of 21, 24%, p < 0.01). Conclusions: Favorable outcomes could be anticipated in postlingual deaf adults with a large cochlear nerve diameter and positive tail sign. A presence of cochlear nerve at a high-frequency region may be an imaging marker for predicting good CI performance