• Proceedings of the Korean Society of Grassland Science Conference
• /
• 2005.06a
• /
• pp.152-153
• /
• 2005

• Proceedings of the KIEE Conference
• /
• summer
• /
• pp.267-269
• /
• 2004

Recently, due to increasing the application of power electronic equipment, harmonics generated from the non-liner load are fairy produced. Harmonics can cause a distribution problems such as the overheating of distribution transformer, the breakdown of device and communication interference. Interest about power quality decline of distribution system is very increased. In this paper, we are measured the harmonic voltage and current of distribution system to analyze harmonic characteristics, and it is analyzed Total Harmonic Distortion(HTD). Also, we are modeled distribution system using PSCAD/EMTDC. And it is analyzed harmonic voltage and current in steady-state. The study result have been indicated the utility about harmonics analysis and modeling for distribution system.

• Annual Conference on Human and Language Technology
• /
• 2010.10a
• /
• pp.179-182
• /
• 2010

트위터, 페이스북 등의 소설 네트워크가 이슈가 되는 사건에 의견을 표시하는 수단으로 많이 활용되고 있다. 본 논문에서는 이슈 키워드 추출 및 트위터와 유투브에 기반한 실시간 검색 시스템을 구현한다. 본 시스템에서는 가장 최근 신문 기사들의 제목과 스니핏을 이용하여 이슈가 되는 키워드를 실시간으로 추출하여 사용자들에게 보여주고 트위터와 유투브 OpenAPI를 이용하여 추출된 키워드에 대한 컨텐츠들을 실시간으로 사용자들에게 보여준다, 본 시스템을 통해서 이슈가 되는 사건에 대한 실시간 반응을 찾을 수 있다.

• Proceedings of the Korean Nuclear Society Conference
• /
• 1996.11b
• /
• pp.521-526
• /
• 1996

원자력 발전소 내의 1차계통수에 존재하는 부식생성물과 노심에서 방사화된 여러 핵종들의 종류와 그 양에 대해서 CRUDSIM/MIT모형을 이용해서 분석하였다. 고리 4호기의 차계통수내의 수화학 조건을 이용하여 CRUDSIM/MIT모형에 적용하고 그 결과를 냉각수의 Activity자료와 증기 발생기의 Activity자료와 서로 비교 분석하였고, 노심과 증기발생기의 Crud양과 Activity를 예상하였다. 이 모형의 주요 인자인 $\beta$$_{c}$와 $\beta$$_{a}$ 값을 증기발생기의 Activity측정자료에 의해서 구하였다. 그리고 발전소 운전 중에 증기 발생기와 냉각수의 Activity각 최소화 할 수 있는 최적 조건 범위도 냉각수의 온도, pH, 수소농도등을 변화시켜서 구하였다. 고리4호기에 이 모형을 적용할 때 입력 자료에서, Activation Factor와 Recoil Release 등의 인자와 증기 발생기의 방사선양과 핵연료 표면의 Crud양을 구할 수 있으면 더욱 정확한 결과 값들을 얻을 수 있다.

• Proceedings of the Korean Society of Computer Information Conference
• /
• 2023.07a
• /
• pp.39-40
• /
• 2023

본 논문은 딥러닝 기반의 소리 인식 모델을 기반으로 실내에서 발생하는 다양한 소리를 시각적인 정보로 제공하는 시스템을 위해 경량화된 CNN ResNet 구조의 인공지능 모델을 제시한다. 적용하는 경량화 기법은 모델의 크기와 연산량을 최적화하여 자원이 제한된 장치에서도 효율적으로 동작할 수 있도록 한다. 이를 위해 마이크로 컴퓨터나 휴대용 기기와 같은 임베디드 장치에서도 원활한 인공지능 추론을 가능하게 하는 모델을 양자화 기법을 적용한 경량화 방법들을 실험적으로 비교한다.

• Proceedings of the Korean Society of Computer Information Conference
• /
• 2023.01a
• /
• pp.241-242
• /
• 2023

본 논문에서는 딥러닝 소리 인식을 이용하여 실내에서 발생할 수 있는 다양한 소리를 시각적인 정보로 제공해주는 스마트허브 시스템을 제안한다. 인공지능 모델은 2D-CNN 구조를 활용하여 학습을 진행하였고, 스마트허브 하드웨어는 라즈베리파이를 이용하여 구현하였다. 제안된 시스템은 청각장애인을 위해 설계된 다양한 청각 정보를 시각 정보로 전달하는 다양한 제품을 하나로 대체할 수 있을 뿐만 아니라, 설치 및 운반이 간편하여 누구나 사용하기 쉬워서 활용도가 높을 것으로 기대된다.

• Radiation Oncology Journal
• /
• v.20 no.2
• /
• pp.116-122
• /
• 2002

Purpose : A randomized prospective study was conducted to compare the efficacy of early or late alternating schedules of radiotherapy, and carboplatin and ifosfamide chemotherapy in patients with limited-disease small cell lung cancer. Materials and Methods: From August 1993 to August 1996, a total of 44 patients with newly diagnosed, limited-disease small cell lung cancer, PS $H0\~2$, wt $loss<10\%$ were enrolled in a randomized trial which compared early alternating radiotherapy (RT)/chemotherapy (CT) and late alternating RT/CT. The CT regimen included ifosfamide $1.5\;g/m^2$ IV, d1-5 and carboplatin AUC 5/d IV, d2 peformed at 4 week intervals for a total of 6 cycles. RT (54 Gy/30 fr) was started after the first cycle of CT (early arm, N=22) or after the third cycle of CT (late arm, N=22) with a split course of treatment. Results : The pretreatment characteristics between the two arms were well balanced. The response rates in the early $(86\%)$ and late $(85\%)$ arm were similar. The median survival durations and 2-year survival rates were 15 months and $22.7\%$ in the early arm, and 17 months and $14.9\%$ in the late arm (p=0.47 by the log-rank test). The two-year progression free survival rates were $19.1\%$ in the early arm and $19.6\%$ in the late arm (p=0.52 by the log-rank test). Acute grade 3 or 4 hematologic and nonhematologic toxicities were similar between the two arms. Eighteen patients $(82\%)$ completed 6 cycles of CT in the early arm and 17 $(77\%)$ in the late arm. Four patients received less than 45 Gy of RT in the early arm and two in the late arm. There was no significant difference in the failure patterns. The local failure rate was $43\%$ in the early arm and $45\%$ in the late arm. The first site of failure was the brain in $24\%$ of the early arm patients compared to $35\%$ in the late arm (p=0.51). Conclusion : There were no statistical differences in the overall survival rate and the pattern of failure between the early and late alternating RT/CT in patients with limited-disease small cell lung cancer.

• Tuberculosis and Respiratory Diseases
• /
• v.42 no.1
• /
• pp.25-34
• /
• 1995

Background: Endobronchial tuberculosis is classified into 7 subtypes as fibrostenotic type, edematous-hyperemic type, actively caseating type, tumorous type, ulcerative type, granular type and nonspecific bronchitic type by bronchoscopic features, and we make a prospective study to follow up how bronchoscopic findings change during treatment-course in each subtype of active endobronchial tuberculosis. Methods: We planned to do follow-up bronchoscopic examination every month until there was no significant change in endobronchial lesion, then every 3 months and at the end of the treatment in each patient with biopsy proven endobronchial tuberculosis from May, 1990 to August, 1993. Results: 1) This study included 66 cases, but bronchoscopic follow-up was completed as scheduled in 47 cases. 2) In actively caseating and edematous-hyperemic type, bronchostenosis occurred within 2 or 3 months of treatment in about 2/3 of total cases. 3) In fibrostenotic type, bronchostenosis did not improve in spite of the treatment. 4) In tumorous type, the changes in bronchoscopic findings were unpredictable because new lesions occured on other sites even 4 or 6 months after treatment in 2 cases and the size of initial mass increased 6 months after treatment in 1 case (among 7 cases). 5) Granular and nonspecific bronchitic type improved without significant sequelae within 2 or 3 months of treatment. Conclusion: It may be necessary to follow up the patient with bronchoscopy repeatedly 2 or 3 months after starting treatment in active endobronchial tuberculosis, and it is better to perform bronchoscopic examination at 6 months of treatment, especially in patients with tumorous type because there is possibility that new endobronchial lesion occurs. Aggressive therapeutic modalities such as stent-insertion, laser therapy or electrocautery should be considered to prevent bronchostenosis in cases with granulation tissue, fibrostenotic and tumorous types of endobronchial tuberculosis.

• Journal of Preventive Medicine and Public Health
• /
• v.16 no.1
• /
• pp.41-50
• /
• 1983

The incidence of sexually transmitted disease, especially gonorrhoea has risen despite the progress in its diagnosis and treatment. For the effective control programs of sexually transmitted disease, it should be required socio-medical approaches. A study on gonorrhoea and penicillinase-producing Neisseria gonorrhoeae(PPNG) was conducted in Jeonju and Kunsan area from March, 1982 through August, 1982. The 221 entertrainers were studied in order to determine the prevalences of gonorhoea and PPNG. Socio-demographic informations of the entertainers were obtained by interviewing them. Gonococci were cultured on Thayer-Martin enrichment media for isolation, and PPNG was confirmed using beta-lactamase reagent ($PADAC^{tm}$ Beta-Lactamase Test Strips, Galbiochem-Behring). The results of the study are summarized as follows; 1. The average age of the entertainers studied was $26.1{\pm}4.7$ years. 2. The average years of working in entertaining business was $2.4{\pm}1.4$ years, and the average income per month was $239,592{\pm}90,480$ won. On the education level, 70.6% of the entertainers were middle or high school graduates 3. 47.5% of the entertainers were using contraceptives. 90.5% have experienced artificial abortion. 4. 37(16.7%) out of 221 entertainers were revealed to gonorrhoea, and 13 (35.1%) of gonorrhoea patients were by PPNG. 5. The prevalence rates of gonorrhoea and the proportion of PPNG by age were not significant statistically. Meanwhile, the colelations between the rates of gonorrhoea and education, frequency of love-making with customers and type of sexual partner were highly significant statistically. 6. 37 strains of gonococci isolated were almostly resistant to several antimicrobial agents, especially amikacin, clindamycin and chloramphenicol. Furthermore PPNG strains were completely resistant to not only above drugs but also penicillin.

• Korean Journal of Clinical Laboratory Science
• /
• v.52 no.3
• /
• pp.237-244
• /
• 2020

Currently, sexually transmitted diseases (STD) are referred to as "sexually transmitted infections" (STIs) in the sense of including asymptomatic infections. STIs have a range of interrelationships. This study used the STI defined by the Minister of Health and Welfare of the Republic of Korea, and targeted syphilis, gonorrhea, chlamydia infection, chancroid, genital herpes simplex, condyloma, human papillomavirus, and non-gonococcal urethritis. The factors were characterized by identifying multiple and simultaneous STIs. This study used the data from the laboratory information system of a consigned inspection institution located in Seoul from 2014 to 2019. In this study, multiple STIs were identified as overlapping STIs of a double infectious source (10 types) and multiple STIs of a third infectious source (6 types). Among the 16 types of multiple STIs, U. urealyticum (9 types), HSV-2 (8 types), C. trachomatis (7 types), HPV 6, 11 (7 types), N. gonorrhoeae (6 types), and T. pallidum (1 type) were included. Therefore, additional research on interrelationship studies, such as STIs, which has the highest proportion of multiple STIs, will be necessary.