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김광현,정영지,심영섭 광주대학교 1996 産業技術硏究 Vol.7 No.-
본 연구에서는 다양한 전파 환경 및 여러 가지 파라미터에 대하여 역동적으로 변화하는 CDMA 시스템의 성능을 분석하기 위한 전력제어 모델을 설정하고 시뮬레이션을 수행하였다. 시뮬레이션 결과 SIR 측정에 근거한 전력제어 알고리즘에 대한 모델리을 통하여 전력제어에 관련한 각종 파라메터들의 변화에 따른 CDMA 시스템의 전력제어 성능을 분석할 수 있었으며 이의 분석을 통하여 최적의 셀 구성을 예측할 수 있었다. In this paper, power control algorithm is modeled and simulated for CDMA system performance analysis with dynamically varying CDMA system parameters in various propagation conditions. Using this power control model, SIR based power control algorithm is simulated with CDMA system parameters in various conditions and power control performance of CDMA mobile communication system is analyzed. It will be applicable for optimal cell planning.
서울대학교병원 소아치과에서 시행한 전신마취에 대한 연구
김광현,김종철,한세현 대한소아치과학회 2001 大韓小兒齒科學會誌 Vol.28 No.1
1997년부터 1999년까지 서울대학교병원 소아치과에서 시행한 37건의 전신마취를 작성된 의무기록을 바탕으로 전신마취의 선택이유, 치료전 전신상태, 연령분포, 치료내용, 합병증과 정기적인 내원여부 등에 대해 조사하여 다음과 같은 결론을 얻었다. 1.전신마취의 선택이유중 대부분(97%)은 장애인이며, 치료전 전신상태는 ASA Class I 또는 Class II 였다. 2.11~15세 환자들(41%)이 가장 많았다. 3.전신마취 하에서 평균 8.1개의 수복치료와 3.3개의 발치를 시행하였다. 4.시술후 합병증은 32%에서 발생하였으나, 대부분 경미하였다. 5.6개월 이상 정기적인 내원을 한 경우는 12명(32%)이었다. We tried to find out the information which can be drawn from the survey of general anesthesia in pediatric clinic at Seoul National University dental hospital from 1997 to 1999. The subjects were 37 patients. Collected data were primary reasons for general anesthesia, preoperative physical status, age distribution, performed dental treatment, complications, follow-up, and etc. Following were the results : (1)Most(97%) of patients treated under general anesthesia were handicapped and preoperative physical status was ASA Class I or Class II. (2)Majority(41%) of patients were between 11 and 15. (3)Average of 8. 1teeth were restored and 3.3teeth were extracted. (4)In 32% of patients, there were mild complications. (5)12(32%) of the patients responded to the six-month recall check
김광현,최영현,최종순,박동삼,유우식 한국공작기계학회 2002 한국공작기계학회 추계학술대회논문집 Vol.2002 No.-
The mechanical etching technique has recently been developed to a powder blasting technique for various materials, capable of producing micro structures larger than 100μm. This paper describes the performance of powder blasting technique in micromachining of pyrex for the accelerometer sensor and the effect of the number of nozzle scanning and the stand-off distance on the erosion depth.
김광현,박영요 Ewha Womans University School of Medicine 2014 EMJ (Ewha medical journal) Vol.37 No.1
Bladder cancer is the second most common malignancy in urological field. Most new cases are diagnosed as non-muscle invasive bladder cancer (NMIBC), which includes Ta, T1 or carcinoma in situ. Initial management of NMIBC is endoscopic resection, which allows both treatment and pathological staging. Urologist should consider adjuvant intravesical chemotherapy or Bacillus Calmette-Guerin (BCG) immunotherapy, depending on the tumor grade or stage to prevent recurrence and progression. Patients with muscle invasive bladder cancer (MIBC) are best treated with radical cystectomy. However, radical cystectomy should be considered even in patients with NMIBC with high risk of progression and BCG refractory tumors. Delay of radical cystectomy in these patients might lead decreased disease specific survival. Patients treated by radical cystectomy should undergo any form of the urinary diversion. Ileal conduit is still most common method for urinary diversion. Orthotopic neobladder is generally performed by experienced hands in high volume center. Patients undergoing orthotopic neobladder should be educated and manually skillful to manipulate their diversion. Neoadjuvant cisplatin-based chemotherapy is recommended based on level 1 evidence with survival benefit. Recent updated meta-analysis also demonstrated survival benefit in patients with MIBC treated by adjuvant chemotherapy.