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N-doped $TiO_2$/PAN 복합 나노섬유의 제조와 광촉매 특성
이성욱,이태상,리강,원방방,황택성,이승구,Lee, Sung-Wook,Lee, Tae-Sang,Li, Gang,Won, Bang-Bang,Hwang, Taek-Sung,Lee, Seung-Goo 한국섬유공학회 2009 한국섬유공학회지 Vol.46 No.6
The $TiO_2$/PAN based composite nanofibers having photocatalytic activity were prepared by sol-gel process, electrospinning and post-treatments. Electrospinning solution was prepared by mixture of $Ti(OBu)_4$, PAN, acetic acid and DMF with different ratio. As-spun nanofibers were treated with different way to prepare the anatase $TiO_2$/PAN nanofibers and the N-doped $TiO_2$/PAN nanofibers. In this study, the morphology and diameter of the electrospun and heat treated composite nanofiber were analyzed, and crystal structure of nanofiber after heat treatment and N-doping was analyzed. Furthermore, photocatalytic decomposition of the nanofiber, crystallized in various condition, against the malachite green aqueous solution, was evaluated.
이성욱,정재훈,정상기,최형식,김준영,Lee, Sung-Wook,Jeong, Jae-Hun,Jeong, Sang-Ki,Choi, Hyeung-Sik,Kim, Joon-Young 대한임베디드공학회 2017 대한임베디드공학회논문지 Vol.12 No.5
Underwater glider with a single buoyancy engine could generally obtain propulsive forces by moving the center of buoyancy and gravity. Futhermore, The hull and internal structure of underwater glider are designed according to the purpose of long-time operation, high speed and a wide variety of payloads (sensors, communications and etc.). In this paper, Ray-type underwater glider featuring flatfish is considered in view of hydrodynamics. The hull design is especially performed by the analysis of fluid resistance and dynamic performance. The resistance performance is analyzed using the Computational Fluid Dynamics (CFD). In addition, a simulation program is implemented in order to verify the validity of dynamics modeling and dynamic performances.
강직을 동반한 전신 발작을 호소하는 심인성 비간질성 발작 환자에 대한 복합 한의치험 1례
이성욱,이현규,배인후,조기호,문상관,정우상,권승원,진철,Lee, Seong Wook,Lee, Hyun-Ku,Bae, In Hu,Cho, Ki-Ho,Moon, Sang-Kwan,Jung, Woo-Sang,Kwon, Seungwon,Jin, Chul 대한중풍순환신경학회 2021 대한중풍.순환신경학회지 Vol.22 No.1
Psychogenic Non Epileptic Seizure (PNES) refers to a case in which symptoms are similar to epileptic seizures (ES), but ES do not appear in EEG and temporary abnormalities caused by physical diseases are also excluded. Psychotherapy and pharmacotherapy are most commonly used, but standard treatment for PNES has not been established and there is no alternative treatment available in the case of patients those treatments are not applied. We herein report a case of 46 year old male diagnosed with PNES who suffered from generalized tonic-clonic seizures. The patient underwent korean medical treatment by acupuncture and herbal medicine. The clinical symptom was evaluated by assessing occurrence frequency, number of seizures per 28 days. Compared to the period without korean medical treatment, the number of seizures decreased during the treatment period. The present case report suggested that korean medical treatment could be an effective option for those PNES patients complaining generalized tonic-clonic seizures.
이성욱(Sung-Wook Lee),홍희기(Hiki Hong),조성환(Sung-Hwan Cho) 대한설비공학회 2013 대한설비공학회 학술발표대회논문집 Vol.2013 No.6
The objective of this study is to compare three controls method such as Setting temp. control, Outdoor reset control and Predicted heating load control. Especially Predicted heating load control has a advantage in terms of figuring out required heat load of the secondary loop. It has carried out by using dynamic analysis program TRNSYS. Base model is the area of 119.7 ㎡ apartment housing which accounts for 25% in Korea. Heat consumption pattern for simulation is included. Results show that lower supply temperature at secondary loop and higher temperature difference at primary loop were calculated by using Predicted heating load control.
이성욱(Sung-Wook Lee),강태구(Tae-Koo Kang) 대한전기학회 2019 대한전기학회 학술대회 논문집 Vol.2019 No.11
시각장애인들이 사회 활동에서 지페를 이용하여 계산을 하거나 돈을 환전할 때 화폐를 혼동하여 손해를 보는 일이 발생한다. 이러한 상황에서 시각장애인들이 다른 사람들과 같이 피해를 보지 않고 경제 활동을 할 수 있도록 도와주는 디바이스가 필요하다고 생각했다. 그래서 구상한 것이 시각장애인이 지페를 사용하는 그 현장에 자신이 어떠한 지페를 꺼내고 가지고 있는지 알려주는 지폐 판별 및 분류 지갑이다. 이 지갑은 화폐를 지갑 내의 카마라로 인식하고 지갑에 분류된다. 또한 어떠한 지폐를 판별하였는지 점자로 나타낸다.
이성욱 ( Sung Wook Lee ),김도진 ( Do Jin Kim ),원휘준 ( Hui Jun Won ),정원양 ( Won Yang Chung ) 대한금속재료학회 ( 구 대한금속학회 ) 2006 ELECTRONIC MATERIALS LETTERS Vol.2 No.1
ZnO-doped CeO2, containing ZnO of 1, 5 and 10 mol%, respectively, has been prepared with purity CeO2 and ZnO powder. All the specimens have been sintered at 1200 for 24 hours and then annealed at 1000℃ for 12 hours. All specimens were identified as fluorite structure by the Rietveld analysis. It is also predicted that the main defect should be oxygen vacancy. Electrical conductivities of all specimens were measured as a function of temperature from 600℃ to 1100℃ and of oxygen partial pressure from 2×10(-1) to 1×10(-5) atm, respectively. The activation energies are 2.0~2.2 eV in high temperature region. In the all region, the oxygen partial pressure dependences of electrical conductivity show that the value of 1/n is -1/4. From the results, the predominant defect of intrinsic and extrinsic regions can be concludes as a singly and doubly ionized oxygen vacancy model, respectively.