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Hydro Dynamic Model을 이용한 CMOS의 파괴특성의 Transient Simulation해석
최원철(Won-Cheol Choi) 한국산업융합학회 2002 한국산업융합학회 논문집 Vol.5 No.1
In present much CMOS devices used in VLSI circuit and Logic circuit. With increasing a number of device in VLSI, the confidence becomes more serious. This paper describe the mechanism of breakdown on CMOS, especially n-MOS, based on Hydro Dynamic model with device self-heating. Additionally, illustrate the CMOS latch-up characteristics on simplified device structure on this paper.<br/>
디바이스 시뮬레이션 기술을 이용한 미세 n-MOSFET의 비등온 비형형장에 있어서의 특성해석
최원철(Won-Cheol Choi) 한국산업융합학회 2001 한국산업융합학회 논문집 Vol.4 No.3
This simulator is developed for the analysis of a MOSFET based on Thermally Coupled Energy Transport Model(TCETM). The simulator has the ability to calculate not only stationary characteristics but also non - stationary characteristics of a MOSFET. It solves basic semiconductor devices equations including Possion equation, current continuity equations for electrons and holes, energy balance equation for electrons and heat flow equation, using finite difference method. The conventional semiconductor device simulation technique, based on the Drift-Diffusion Model (DDM), neglects the thermal and other energy-related properties of a miniaturized device. I, therefore, developed a simulator based on the Thermally Coupled Energy Transport Model (TCETM) which treats not only steady-state but also transient phenomena of such a small-size MOSFET. In particular, the present paper investigates the breakdown characteristics in transient conditions. As a result, we found that the breakdown voltage has been largely underestimated by the DDM in transient conditions.<br/> <br/>
알레젠 제거 옻나무 추출물 투여로 생존기간이 연장된 편평세포폐암 환자 1례
김은희,박소정,최원철,이수경,Kim, Eun-Hee,Park, So-Jeong,Choi, Won-Cheol,Lee, Soo-Kyung 대한암한의학회 2011 大韓癌韓醫學會誌 Vol.16 No.2
Background : Lung cancer is one of the most common malignancy in the world. Types of lung cancer are Non small cell lung cancer and small cell lung cancer. Subtypes of Non small cell lung cancer are adenocarcinoma, squamous cell carcinoma and large cell carcinoma. Knowing the type of lung cancer is important in determining both treatment and prognosis. Recently, due to newly developed anti-cancer drugs, squamous cell carcinoma has relatively poor prognosis than non-squamous cell carcinoma. Case : We report a squamous cell lung cancer case treated with allergen removed Rhus verniciflua Stokes (aRVS) extract. The patients initially diagnosed stage squamous cell lung carcinoma, but she refused recommended operation. She initiated aRVS extract monotherapy in October. 2006. The follow up Computed tomography in March. 2007, she diagnosed stable disease of tumor response on aRVS treatment. However, this case was lost to follow up for 6 months while she was treated with tomotherapy. In October 2007, she came back to our cancer center after diagnosed stage IV metastasized lung to lung, and aRVS monotherapy was restarted. She had survived 2 years after metastasis of squamous cell lung carcinoma. Conclusion : Allergen removed Rhus verniciflua Stokes(aRVS) sucessfully prolonged overall survival of a squamous cell lung cancer patient.
알러젠 제거(除去) 옻나무 추출물(抽出物) 투여(投與)로 호전(好轉)된 편도선암(扁桃腺癌) 환자(患者) 1례(例)
최진영,박재우,김경석,최원철,윤성우,Choi, Jin-Young,Park, Jae-Woo,Kim, Kyung-Suk,Choi, Won-Cheol,Yoon, Seong-Woo 대한암한의학회 2007 大韓癌韓醫學會誌 Vol.12 No.1
Tonsil is rich in lymphatics, blood vessels, muscle, nearby nerve fibers and epithelium. All of these are potential sources of malignancy. Malignancy of the tonsils is an uncommon entity that accounts for little more than 0.5% of new malignancies in the United States every year. Approximately, more than 70% of malignancies in this region are squamous cell carcinoma. In this report, I introduce a case of 47 year male patient who has right tonsillar cancer that is squamous cell carcinoma(T4N3M0). After three times chemotherapy, the patient refused to get conventional western medical treatment including chemotherapy and surgical operation. After 8 month of traditional oriental medical treatment using allegen removed Rhus Verniciflua Stokes(ARV), the size of cancer mass decreased and mass showed necrosis at inner portion. The patient improved pain in the neck. More case will be needed in order to determine the effect of ARV on tonsillar cancer.
건칠(乾漆) 추출물(Nexia)의 Quality Control을 위한 기시법 및 안정성 연구
박상재,김경석,정현식,최원철,윤성우,Park, Sang-Jae,Kim, Kyung-Suk,Jung, Hyun-Sik,Choi, Won-Cheol,Yoon, Seong-Woo 대한암한의학회 2006 大韓癌韓醫學會誌 Vol.11 No.1
Rhus Verniciflua Stokes has been used for long history to treat blood stasis and cancer in Oriental Medicine. But urushiol, a constituent of Rhus Verniciflua Stokes has T-cell mediated allergic reaction, so it has made clinical limitation. Nexia is allergen removed extract of Rhus Verniciflua Stokes and its extraction process as well as quality control is needed to be standardized. The optimized extraction condition is as follow; temperature is $90{\sim}95^{\circ}C$, volume of slovent 10 times, extraction time >6 hours, pressure $<lkg/cm^2$, slovnet water or EtOH(60%), yield 8.1${\sim}$9.8(w/w). HPLC pattern and isolation study showed Nexia contain fisetin(>13.0%), fustin(>7.0%) and no urushiol.
알러젠 제거(除去) 옻나무 추출물(抽出物) 투여(投與)로 호전(好轉)된 유방암(乳房癌) 환자 1례
김초영,박재우,정현식,최원철,윤성우,Kim, Cho-Young,Park, Jae-Woo,Jung, Hyun-Sik,Choi, Won-Cheol,Yoon, Seong-Woo 대한암한의학회 2007 大韓癌韓醫學會誌 Vol.12 No.1
Breast cancer is common in West and Incidence of breast cancer has increased in Korea. According as conventional western medical treatment, breast cancer patient received MRM(modified radical mastectomy) and anti cancer chemotherapy. In this case report, We introduce a case of breast cancer patient who showed lung metastasis(metastatec adenocarcinoma) after MRM(modified radical mastectomy) 4 years before the diagnosis of relapse. After lung metastasis of breast cancer, the patient received 4th chemotherapy and refused to get more conventional western medical treatment including chemotherapy. After 24 month of traditional oriental medical treatment using allegen removed Rhus Verniciflua Stokes(ARV), however, the size of cancer mass decreased and the patient showed improved condition. Further case study will be needed in order to determine the effect of ARV on breast cancer patient.