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조성양,고명아,이동환,권혁성,권순억 대한신경과학회 2018 대한신경과학회지 Vol.36 No.3
Superficial siderosis results from the deposition of hemosiderin in subpial layers of the central nervous system following hemorrhage in subarachnoid spaces. Infratentorial superficial siderosis (ISS) presents with unique clinical features including progressive hearing loss, ataxia, and myelopathy, and the most common cause of idiopathic ISS is dural abnormality. Here we report a case of idiopathic ISS with radiological findings of spontaneous intracranial hypotension, whose clinical symptoms of ISS including cerebellar dysfunction improved after supine position was maintained for 2 months.
An Autopsy-Proven Case of Lewy Body Disease Presenting with Severe Dysphagia
조성양,남수정,박계원,이재홍,Chong Sik Lee 대한파킨슨병및이상운동질환학회 2021 Journal Of Movement Disorders Vol.14 No.3
Lewy body dementia (LBD) is the second most common neurodegenerative dementia after Alzheimer’s disease (AD) [1]. LBD includes dementia with Lewy bodies (DLB) and Parkinson’s disease (PD) with dementia (PDD), which share clinical features. DLB and PDD are classified according to the timing of the onset of dementia in relation to that of motor symptoms. PDD and DLB show similar neuropathological changes, such as cortical and brainstem Lewy bodies accompanied by varying degrees of AD pathology.
Infrared Focal Plane Array 용 MEMS 구조체 개발
曺星穆(Seong M. Cho),梁佑碩(Woo Seok Yang),柳浩駿(Ho Jun Ryu),田尙勳(Sang Hoon Cheon),兪炳坤(Byoung-Gon Yu),崔昌億(Chang Auck Choi) 대한전기학회 2007 전기학회논문지 Vol.56 No.8
A micromachined sensor part for an infrared focal plane array has been designed and fabricated. Amorphous silicon was adapted as a sensing material, and silicon nitride was used as a membrane material. To get a good efficiency of infrared absorption, the sensor was made as a λ/4 cavity structure. All the processes were done in 0.5 ㎛ iMEMS fab. in the Electronics and Telecommunication Research Institute (ETRI). The processed MEMS sensor structure had a small membrane deflection less than 0.3 ㎛. This excellent deflection property can be attributed to the rigorous balancing of the stresses of individual layers. The efficiency of infrared absorption was more than 75% in the wavelength range 8 - 14 ㎛.
양인준,조성기 한국음악교육공학회 2024 음악교육공학 Vol.- No.58
In recent music classes in secondary schools, singing activities are not well performed, and the proportion of classes is decreasing. The purpose of this study is to understand the reasons and issues related to this trend and explore solutions by analyzing the current state, perceptions, and demands of vocal repertoire and teaching methods in secondary schools singing education. To achieve this goal, various literatures on singing class vocal repertoire and teaching methods were reviewed, and based on this, a survey tool was developed to find out the actual condition and demand of singing class vocal repertoire and teaching methods, and a survey was conducted on middle and high school music teachers nationwide, and statistics on the responses of 67 respondents were analyzed. As a result of the analysis, secondary school music teachers were strongly aware of the necessity of singing education. However, in actual music classes, singing classes were allocated as the third priority after instrumental and listening classes, resulting in a decrease in singing education. As singing class vocal repertoire, both art songs and popular music were used in the same ratio, but there was a preference for Korean art songs in the art song category and Korean popular songs in the popular music category. The main contents dealt with when teaching art songs were vocalization and breathing, but in the case of popular music, the focus was on the content of the lyrics and background knowledge.
조성락(Sung Rag Cho),나산균(San Gyun Rha),문성수(Seong Soo Moon),한규호(Kyu Ho Han),박인철(In Cheol Park),김순관(Soon Kwan Kim),양만석(Man Seok Yang),허갑도(Gap Do Hur),최태룡(Tae Lyong Choi) 대한소화기학회 1991 대한소화기학회지 Vol.23 No.1
Unilobular atrophy or hypoplasia involving the hepatic lobes is not uncommon on the left side. It is distinctly uncommon on the right, where it probably represents an developmental anomaly if no other etiological factor is demonstrable. So we report a case of hypoplasia of right hepatic lobe.
조성목,황치선,최지훈,김용해,전상훈,최경희,김주연,양종헌,Cho, S.M.,Hwang, C.S.,Choi, J.H.,Kim, Y.H.,Cheon, S.H.,Choi, K.H.,Kim, J.Y.,Yang, J.H. 한국전자통신연구원 2020 전자통신동향분석 Vol.35 No.4
In this article, we review the study trends of three-dimensional (3D) displays that can display stereoscopic images from the perspective of a display device. 3D display technology can be divided into light field, holographic, and volume displays. Light field display is a display that can reproduce the intensity and direction of light or 'ray' in each pixel. It can display stereoscopic images with less information than a holographic display and does not require coherence of the light source. Therefore, it is expected that it will be commercialized before the holographic display. Meanwhile, the holographic display creates a stereoscopic image by completely reproducing the wavefront of an image using diffraction in terms of wave characteristics of light. This technology is considered to be able to obtain the most complete stereoscopic image, and the digital holographic display using a spatial light modulator (SLM) is expected to be the ultimate stereoscopic display. However, the digital holographic display still experiences the problem of a narrow viewing angle due to the finite pixel pitch of the SLM. Therefore, various attempts have been made at solving this problem. Volumetric display is a technology that directly creates a stereoscopic image by forming a spatial pixel, which is known as a volumetric pixel, in a physical space, and has a significant advantage in that it can easily solve the problem of the viewing angle. This technology has already been tested for commercial purposes by several leading companies. In this paper, we will examine recent research trends regarding these 3D displays and near-eye display that is emerging as a significant application field of these technologies.
복합재료인증체계를 통한 UAM 용 복합재료 부분품 인증 적합성 확인 방안
조성인,양용만,정석호,김제준,Cho, Sung-In,Yang, Yong Man,Jung, Seok-Ho,Kim, Je-Jun 항공우주시스템공학회 2022 항공우주시스템공학회지 Vol.16 No.3
UAM (Urban Air Mobility) is a new safe, secure, and more sustainable air transportation system for passengers and cargo in urban environments. Commercial operations of UAM are expected to start in 2025. Since production rates of UAM are expected to be closer to cars than conventional aircraft, the airworthiness methodology for UAM must be prepared for mass production. Composite materials are expected to be mainly used for UAM structures to reduce weight. In this paper, the composite material qualification method was derived and the materials were applied for small aircraft application. It is expected to reduce the airworthiness certification time by applying composite material qualification system and its database.
조성락(Sung Rag Cho),김주호(Ju Ho Kim),한규호(Kyu Ho Han),박인철(In Cheol Park),김순관(Soon Kwan Kim),양만석(Man Seok Yang),허갑도(Gap Do Hur),최환주(Hwan Joo Choi),지정희(Jung Hee Ji) 대한소화기학회 1989 대한소화기학회지 Vol.21 No.3
This paper describes a unique case of concurrent malignant lymphoma of the colon and small intestine. Primary gastrointestinal lymphoma primarily confined to gastrointestinal tract is relatively rare disease, and the concurrent lymphoma of colon and small bowel is very rare in reported cases. We experienced of malignant lymphoma of entire ileum and colon, especially cecum. Ileum was widely involved, and colonic lumen was stricture and mucosal fold was destructed by polypoid mass and ulceration. He was expired due to ileal perforation. We report this case with a review of the literature.