• Journal of Chest Surgery
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• v.43 no.3
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• pp.320-323
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• 2010

Adenoid cystic carcinoma is a relatively rare tumor that usually arises in the parotid and submandibular salivary glands. The initial management is surgical, and this is often combined with post-operative radiotherapy, but local relapse is common and distant metastasis is not infrequent. We experienced the case of a 59 years old male who had been previously operated on for a primary submandibular salivary cyst, and he then had a distant pulmonary metastasis 9 years later. We operated on him with performing a wedge resection on the left lower lobe for the metastatic lesion, and he hasn't had any evidence of tumor recurrence for 84 months after the second operation.

• Proceedings of the KSRS Conference
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• 2008.03a
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• pp.237-240
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• 2008

본 연구의 목적은 인공신경망 기법을 이용하여 2006년 전국을 대상으로 구축된 국토환경성평가지도의 환경 생태적항목에 대한 각 항목별 가중치를 결정하는 것이다. 기본 분석 도구로 지리정보시스템(GIS)가 사용되었다. 국토환경성평가지도의 환경 생태적항목은 다양성(생태자연도), 자연성(임상도, 녹지자연도, 생태자연도), 풍부도(생태계변화관찰 지역도), 희귀성(생태자연도), 허약성(수치지형도, 토지피복도), 군집구조의 안정성(임상도)등이 활용되어 구축되었다. 본 연구는 기 구축되어 사용되고 있는 국토환경성평가 지도의 환경 생태적항목을 공간 데이터베이스를 이용하고, 인공신경망 기법을 적용하여 각 평가항목간의 상대적 가중치를 구하였다. 인공신경망의 훈련 지역은 환경 생태적항목중 환경성이 높은 1등급 지역 및 환경성이 낮은 5등급 지역을 추출하였다. 그 결과 50번의 가중치를 산정하였을 경우 허약성이 다른 항목들에 비해 1.58배 정도 높은 상대적 가중치를 나타냈다. 이러한 가중치는 국토환경성평가지도 환경 생태적 항목의 취약성도를 작성하는데 활용될 수 있다.

• Journal of Korea Society of Industrial Information Systems
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• v.5 no.3
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• pp.44-50
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• 2000

This paper presents the effective data processing system of a transportable meteorological radar(DWSR-200x). Transportable meteorological radar is useful as it can be moved to target area for special purpose. First of all, to use this radar effectively, it is desirable that the data transmitting should be taken place between the radar system and the data center located in a distance. From this raw data we can analyze the property of atmosphere, as well as sore and display the demanded shape of users. In this paper, we make use of wireless LAN that communicates the data between the radar system and the information center. And the display program of transportable radar is developed with transmitted data. It provides meteorologists with the echo searching function in real time and dictionary faculty using the graphic and multimedia data.

• Radiation Oncology Journal
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• v.9 no.2
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• pp.249-252
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• 1991

A Retrospective study to analyze the failure pattern in locally advanced stomach cancer, treated with radical surgery and post-op chemotherapy was perfomed. Among 107 patients who underwent radical gastrectomy in Asan Medical Center between June 1989 and August 1990. there were 20 stage II(T2NO, T2N1) and 87 stage III(T3N1, T3N2) and 91 patients were eligible for study. 57 patients treated with 6 cycles of postop adjuvant chemotherapy. Among 57 patients treated with postop adjuvant chemotherapy, local failure occurred in $21\%$ and distant failure in $12\%$. Among 34 patients who were not treated with postop chemotherapy, local failure occurred in $24\%$ and distant failure in $26\%$. Among 29 failures including 13 locoregional, 9 distant metastasis and 7 locoregional and distant metastasis, 11 cases recurred in the anastomotic site, 3 in the gastric bed,7 in the regional lymph nodes and peritoneal seeding occurred in 6 cases. The true incidences of gastric bed, nodal and peritoneal failures may be higher in the longer follow-up or reoperative or autopsy series. Our data sugest that postop chemocherapy is beneficial by reducing distant failure rate. Our data suggest that postop chemocherapy is beneficial by reducing distant failure rate. Postop adjuvant locoregional radiotherapy in addition to the systemic adjuvant therapy may reduce the local failure rate and potentially benefit in at least $20\%$ of patients who developed the local failure only.

• Radiation Oncology Journal
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• v.16 no.1
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• pp.51-61
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• 1998

Purpose : Treatment of choice for uterine cervix cancer stage IIB is radiotherapy. We analyzed survivals, Prognostic factors, patterns of failure and complications. Materials and Methods : This is a retrospective analysis of 167 patients with stage IIB carcinoma of uterine cervix treated with curative external pelvic and high dose rate intracavitary radiotherapy at the Department of Therapeutic Radiology, Soonchunhyang University Hospital from August 1985 to August 1994. All the patients followed up from 3 to 141 months(mean 60 months) and age of patients ranged from 31 to 78 years at presentation(mean : 55 years). Results : Overall complete response rate was $84\%$. The response rate for squamous cell carcimoma and adenocarcinoma were $86\%$ and $60\%$, respectively. Overall 5-years survival rate and disease free survival rate was 62 and $59\%$, respectively Mass size and treatment response were significant Prognostic factors for survival Pathologic type and parametrial involvement were marginally significants Prognostic factors. Local failure was 43 cases, distant metastasis was 14 cases and local failure plus distant metastasis was 3 cases, and most of local failures occurred within 24 months, distant metastasis within 12 months after treatment Twenty eight($16.8\%$) patients developed late rectal and urinary complications There were tendency to increasing severity and frequency according to increased fractional dose and total(rectal and bladder) dose. Conclusions : Survival rate was significantly related to tumor size and radiotherapy response. Tumor size should be considered in the clinical s1aging. To increased survival and local control, clinical trials such as decreasing duration of radiotherapy or addition of chemotherapy is needed. To detect early recurrence, regular follow up after RT is important. Because total rectal and bladder dose affected late complications. meticulous vaginal packing is needed to optimize dose of normal tissues and to decrease late complications.

• Korean Journal of Remote Sensing
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• v.29 no.1
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• pp.57-68
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• 2013

Large-scale coastal construction projects, such as land reclamation and dykes, were constructed from the late twentieth century in Yoobu-Do region. Land reclamation combined with the dynamics of tidal currents may have accelerated local sedimentation and erosion resulting in rapid reformation of coastal topography. This study presents the results of the topography changes around Yoobu-Do by large-scale coastal constructions using time-series waterline extraction technique of Landsat TM/ETM+ data acquired from 1998 to 2012. Furthermore, the Freeman-Durden decomposition was applied to fully polarimetric RADARSAT-2 SAR data in order to analyze the scattering mechanisms of the deposited surface. According to the case study, the deposition areas were over 4.5 $km^2$ and distributed in the east, northeast, and west of Yoobu-Do. In the eastern deposition area, it was found that the scattering mechanism was difference from other deposition areas possibly indicating that different types of soil were deposited.

• Journal of the Institute of Electronics Engineers of Korea SC
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• v.48 no.5
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• pp.93-98
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• 2011

In this paper, we propose the surveillance and combat robot framework for remote monitoring and robot control on the smart phone, which is implemented with the fusion technology called RITS(Robot technology & Information Technology System). In our implemented system, the camera phone mounted on the robot generates signals to control the robot and sends images to the smart phone of the operator. Therefore, we can monitor the surrounding area of the robot with the smart phone. Besides the control of the movement of the robot, we can fire the weapons armed on the robot by sending the fire command. From experimental results, we can conclude that it's possible to control the robot and monitor the surrounding area of the robot and fire the weapons in real time in the region where the 3G(Generation) mobile communication is possible. In addition, we controlled the robot using the 2G mobile communication or wired phone when the robot is in the visual range.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.15 no.10
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• pp.6282-6288
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• 2014

$CO_2$ welding is used widely in the field. On the other hand, welding defects occur when welders cannot adjust the current and voltage needed for welding and have to stop working to adjust the current and voltage, causing sudden cooling down of the welding structure inside a vehicle or tank where the control panel is invisible or when work site is far. This study used three types of existing $CO_2$ welders. This also applied SS400 rolled steel for welding structural purposes for remote control torch welding, perform a welding test through v-groove butt welding with a remote control torch and existing $CO_2$ welding torch, conducted visual inspection on the appearance of a welded top bead. In addition, the appearance quality of the welding part was monitored mainly through penetrant testing and a bending test to evaluate the welding defect reduction and the effect on the performance and compatibility by replacing the existing welder.

• The Journal of the Korea institute of electronic communication sciences
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• v.16 no.6
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• pp.1363-1372
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• 2021

Red tide, defined as the major reproduction of harmful birds, has the characteristics of being generated and diffused in a wide area. This has limitations in detection only with the existing investigation method. Therefore, in this study, red tide was detected using a remote sensing technique. In addition, it was intended to increase the accuracy of detection by using optical characteristics, not just the concentration of chlorophyll. Red tide mainly occurs on the southern coast where sea signals are complex, and the main red tide control species on the southern coast is Cochlodinium polykirkoides. Therefore, it was intended to secure objectivity by reflecting features that could not be found depending on the researcher's observation and experience, not limited to visual judgment using machine learning techniques. In this study, support background machines and random forest were used among machine learning models, and as a result of calculating accuracy as performance evaluation indicators of the two models, the accuracy was 85.7% and 80.2%, respectively.

• Radiation Oncology Journal
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• v.10 no.2
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• pp.267-275
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• 1992

Remote afterloading high dose rate brachytherapy (HDRB) is a new technology and needs new biological principle for time and dose schedule. Here, authors attempt to evaluate the technique and clinical outcome in 116 patients, 590 procedures peformed at Asan Medical Center for 3 years. From Sep. 1989 to Aug 1992, 471 procedures of intracavitary radiation in 58 patients of cervical cancer and 26 of nasopharyngeal cancer,79 intraluminal radiation in 12 of esophageal cancer, 11 of endobronchial cancer and 1 Klatskin tumor and 40 interstitial brachytherapy in 4 of breast cancer, 1 sarcoma and 1 urethral cancer were performed. Median follow-up was 7 months with range $1\~31$ months. All procedures except interstitial were performed under the local anesthesia and they were all well tolerated and completed the planned therapy except 6 patients. 53/58 patients with cervical cancer and 22/26 patients with nasopharynx cancer achieved CR. Among 15 patients with palliative therapy, $80{\%}$ achieved palliation. We will describe the details of the technique and results in the text. To evaluate biologic effects of HDRB and optimal time/dose/fractionation schedule, we need longer follow-up. But authors feel that HDRB with proper fractionation schedule may yield superior results compared to the low dose rate brachytherapy considering the advantages of HDRB in safety factor for operator, better control of radiation dose and volume and patients comfort over the low dose brachytherapy.