비정질 인듐갈룸ᅳ아연-산화물 박막트랜지스터 기반의 AMOLED 화소 회로

이재표(Jae-Pyo Lee),유경민(Kyeong-Min Yu),장진녕(JinNyoung Jang),홍문표(MunPyo Hong),배병성(Byung Seong Bae) 호서대학교 공업기술연구소 2013 공업기술연구 논문집 Vol.32 No.2

본 논문은 비정질 인둠ᅳ갈f ᅳ아연-산화물 박막트랜지스터 (a-IGZO TFT)를 이용하여 능동형 유기발광다이오드 (AMOLED)용 문턱전압(Vth )을 보상하는 화소 회로를 제안하였다. 산화물 TFT는 n-채널 TFT로써, 우리는 n-채널 TFT 특성으로 회로를 최적화하였다. 제안된 화소 회로는 회로 시뮬레이션 뿐만 아니라 회로 분석을 이용하여 확인되었다. 제안된 화소 회로는 AMOLED에서 구동 TFT의 문턱전압 변화를 보상할 수 있다. 제안된 화소 회로를 이용함으로써, 문턱전압 보상은 달성되었다. rhis paper proposes a tnresnold voltage compensation pixel circuit for active-matrix organic light-emitting diode (AM OLED) using amorphous indium-gaUiimi-zinc-oxide thin-film transistors (a-IGZO TFTs), Oxide TFT is an n-channel TFT; therefore, we optimized the circuit for the n-channel TFT characteristics. The proposed pixel circuit was verified using circuit analysis as well as circuit simulations. The proposed circuit could compensate for the threshold voltage variations o f drive TFT in AM OLED. Using the proposed pixel circuit, threshold voltage compensation was achieved.

韓國人의 各 臟器組織中 靑酸鹽의 微量分布에 關한 硏究(Ⅱ)

張成吉,金恩浩,金英雲,李鎭勳,柳在薰,權五星,金明德,吳世珍,金由那 內務部 國立科學搜査硏究所 2001 國立 科學 搜査 硏究所 年報 Vol.33 No.-

S-밴드 레이다에서의 電磁波 現象에 關한 硏究

張宰成,高興眞,康富植 제주대학교 1993 논문집 Vol.37 No.-

. It is necessary to clarify radio duct properties and clutter in order to estimate propagation characteristics for radar system. Clutter generates by radar echos make difficult the detection of wanted target. Clutter echos limit the sensitivity of a radar receiver, and determining the range performance. For these circumstance, the optimum radar waveform and receiver must be designed by the other way which is considered only the receiver noise effect. In this paper, analysis radio duct properties, occurrence probabilities, land and sea clutter in a S-Band radar were investigated. The ground clutter-to-noise ratios, the target signal-to-noise ratios and the signal-to-noise-plus-clutter ratios are calculated by the parameters of a S-band radar.

保存血의 腐敗産物에 依한 에틸알콜 生成濃度에 關한 硏究(Ⅱ)

張成吉,金英雲,柳在薰,權五星,朴世延 內務部 國立科學搜査硏究所 2002 國立 科學 搜査 硏究所 年報 Vol.34 No.-

生體血의 保存環境과 腐敗産物에 依한 血中알콜濃度變化에 關한 硏究

張成吉,金英雲,柳在薰,吳世珍,權五星,朴世延 內務部 國立科學搜査硏究所 2001 國立 科學 搜査 硏究所 年報 Vol.33 No.-

카이로프랙틱 도수요법에 의한 경추성 두통의 치료

장재호,사공은성 고신대학교의과대학 2008 고신대학교 의과대학 학술지 Vol.23 No.4

Purpose : Cervicogenic headache is a neck induced headache syndrome. Chiropractic Spinal Manipulation Therapy (CSMT) is non-invasive treatment method for painful lesion. CSMT is considered to relief the pain and increase the range of motion of cervical spine without complications. Materials and Methods : A follow-up observation has been made by retrospective study after applying chiropractic spinal manipulation therapy on 28 cases of cervicogenic headache patients who visited our hospital from April 2005 to April 2007. Every patiens had performed Short-Form McGill Pain Questionnaire, Neck Disability Index, and SF-36 Questionnaire. Results : 28 patients average age was 37(14∼73). Female patient was 23 out of 28 and 5 was male patients. The average duration of treatment was 13.6 weeks. The Short-Form McGill Pain Questionnaire, in which questions about the level of pain in general and the Pain Relating Index (PRI), was 11.7 in average before chiropractic spinal manipulation and 3.7 in average after manipulation (P=0.196). The Visual Analog Scale (VAS 0-10) showed pain decrement from 6.1 to 3.1 after manipulation (P=0.126). PPI showed improvement from 2.75 to 0.5 after manipulation(P=0.1). In the Neck Disability Index, which questions the physical disability due to pain, the decrement in average was 14.6 to 4 after manipulation. The results of SF-36 Questionnaire, which deals with the patient's general health showed decrement from 57.8. to 69.4(P=0.317) after manipulation. Conclusion : CPMT has pain relieving effects in cervicogenic headache and also shows increased neck range of motion after treatment. Therefore, CSMT can be a one of useful treatment method for cervicogenic headache.

도심지역 이동통신의 전파특성 모델

장자영,노순국,박종천,김재섭,박성렬,박창균 조선대학교 동력자원연구소 1996 動力資源硏究所誌 Vol.18 No.1

To predict accurately an antenna radiation pattern is very important for determining of a service area, base-station location, cell design. In this paper, we have calculated a propagation prediction data of Hata, Egri, Carey, Free Space Loss model by a computer simulation in Kwang-ju downtown, and the data is compared with field test data. As a results, Hata and Egri model are approached to field test data, but considerable errors are detected.Conclusively, we believe that the most accurate prediction model must propose to improve the radio propagation environments for the specified region. For resolve these problems, we are proposed a mew experimental radio wave propagation predict model.

국내 카드뮴 취급 사업장의 카드뮴 폭로 실태 평가

강성규,홍정표,김기웅,장재연,정호근,정규철 大韓産業醫學會 1994 대한직업환경의학회지 Vol.6 No.2

Twenty-four factories registered at the Ministry of Labor as factories using or producing cadmium in 1991 were investigated to know the present state of occupational exposure to cadmium in 1992. Nine factories among 24 stopped using or changed to other substances and 1 factory didn't produce any more, but delivered it to other factories through imports. Therefore, only 14 factories were producing or using cadmium. But, alloying materials were supplied to about 20 and more factories, however, they couldn't be investigated because of limited information. Three factories had less than 50 workers were 3,6 had 50-300 and 5 had more than 300. About 167 workers were exposed to cadmium. According to the classification by process, there were 4 alloy processes, 2 refinary, 2 elctroplating, 2 dry cell making, 1 industrial battery making, 1 duplicator drum making, 1 recycling of battery and 1 copper refinary. 8 factories used metal cadmium, 3 cadmium oxide, 2 cadmium sulfide, and 1 cadmium hyroxide. One factory was importing cadmium stearates only and supplying them to the PVC making factories. The amount of metal cadmium producing in 2 refinary factories was about 50-65 ton per month. The other cadmium compounds were imported. According to exposure level of cadmium air of the 10 factories examined, each factory could be divided into high, moderate and low exposure groups. 1 battery recycling factory and 3 alloy factories were in the high exposure group and their mean air concentrations were 0.06679, 0.05481, 0.02492, and 0.003㎎/㎥, respectively. Refinary and industrial battery making factories were in the middle exposure group and their mean air concentrations were 0.00773 and 0.00613 ㎎/㎥, respectively. Finally, low exposure group were copper smelting, dry cell case making, duplicator drum making and electroplating factory and their mean air concentrations were 0.00096, 0.00071, 0.00057 and 0.00054 ㎎/㎥ respectively.

인체 요로상피암에서 angiogenin과 vascular endothelial growth factor의 mRNA발현

전성수,장훈,김원재 충북대학교 의과대학 충북대학교 의학연구소 2003 忠北醫大學術誌 Vol.13 No.2

연구목적: 혈관신생은 종양의 발생과 진행에 중요한 역할을 하며 angiogenin과 vascular endothelial growth factor (VEGF) 등과 같은 여러 인자가 관여한다. 본 연구에서는 방광내 요로상피암 조직에서 angiogenin과 VEGF mRNA 발현을 정량적으로 분석하여 이들 인자가 방광암에 미치는 영향을 조사하였다. 대상 및 방법: 방광암 조직 117예와 정상 방광 조직 17예를 대상으로 angiogenin과 VEGF mRNA 발현을 quantitative competitive polymerase chain reaction (QC-PCR) 방법으로 정량화 하였다. 방광암과 정상 방광 조직, 방광암과 동일 환자의 주변 정상 방광 조직, 종양의 분화도 및 병기에 따른 angiogenin과 VEGF mRNA 발현을 비교 분석하였다. 결과: 대조군의 정상 방광 조직이나 방광암 주변의 정상 방광 조직보다 방광암 조직에서 angiogernin과 VEGF 발현이 유의하게 증가하였다. 병기 Ta 방광암보다 병기 T1 또는 T2 이상의 방광암에서 anigiogenin 발현이 유의하게 증가하였다. 분화도 등급 I인 방광암 보다 등 급 III인 방광암에서 VEGF 발현이 유의하게 증가하였다. 그러나 방광암의 분화도에 바른 angiogernin 발현이나 방광암의 병기에 따른 VEGP 발현에는 유의한 차이가 없었다 결론: 혈관신생 인자인 angiogenin과 VEGF는 방광암의 증식에 관여하며, 특히 방광암 세포가 악성화됨에 따라 VEGF 발현이 증가하고 angiogenin에 의한 혈관신생은 종양의 병기가 Ta에서 T1 이상으로 진행하는데 중요한 역할을 할 것이다. Purpose: Tumor development and progression are angiogenesis-dependent, the Induction of which is mediated by several angiogenic factors including angiogenin and vascular endothelial growth factor (VEGF). This study was performed to evaluate the expression of angiogenin and VEGF in the tumor tissues of patients with urothelial carcinoma. The correlation of these factors with tumor grade and stage was also evaluated. Materials and Methods: The quantification for the expression of angiogenin and VEGF mRNA was assessed in 117 human bladder tumor tissues and 17 normal bladder mucosae using quantitative competitive polymerase chain reaction (QC-PCR). We compared the expression levels of angiogenin and VEGF mRNA between bladder tumor and normal bladder mucosae of controls, between bladder tumor and surrounding normal bladder mucosae, and according to tumor grades and tumor stages. Results: Angiogenin and VEGF mRNA expression in the bladder tumor tissue were significant1y higher than in the normal bladder mucosae of controls or surrounding normal bladder mucosae. Angiogenin expression in bladder tumor with stage T1 or above T2 was significantly higher than in bladder tumor with stage Ta. VEGF expression in bladder tumor with grade III was significantly higher than in bladder tumor with grade I. There was no significant difference in angiogenin expression with regard to the tumor grades and no significant difference in VEGF expression with regard to the tumor stages. Conclusion: These data suggest that angiogenesis mediated by angiogenin and VEGF may be involved in the neoplastic growth of urothelial carcinoma. As the grade of bladder tumor cells worsened, the VEGF expression increased. And, increased angiogenesis mediated by angiogenin seems to play a role in the progression of stage Ta bladder tumor to stage T1 or stage above T2.

Pb의 노출에 따른 넙치, Paralichthys olivaceus, 치어의 생존, 성장 및 산소소비율의 변화

김성길,김재원,장석우,김상규,강주찬 한국어병학회 2002 한국어병학회지 Vol.15 No.3

Experiments were carried out to investigate the effects of lead exposure on survival, growth and oxygen consumption of juvenile oliver flounder, Paralichthys olivaceus. Survival rate of the oliver flounder was significantly affected above 150㎍/L. Growth of the olive flounder exposed to ≥ 150 ㎍/L of lead concentration was significantly lower than that of fish reared in normal condition. Metabolic rate of fish exposed to lead ≥ 80 ㎍/L concentration was significantly reduced with increasing lead concentration than that in normal condition. This study revealed that high lead concentration (≥ 80 ㎍/L) reduced growth and metabolic rates of juvenile olive flounder suggesting potential influence of lead on the natural mortality of olive flounder in the coastal areas.