• Journal of Korean Neurosurgical Society
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• 제50권3호
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• pp.179-184
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• 2011

Objective : The aim of this study is to evaluate the therapeutic effects of gamma knife radiosurgery (GKRS) in patients with multiple brain metastases and to investigate prognostic factors related to treatment outcome. Methods : We retrospectively reviewed clinico-radiological and dosimetric data of 36 patients with 4-14 brain metastases who underwent GKRS for 264 lesions between August 2008 and April 2011. The most common primary tumor site was the lung (n=22), followed by breast (n=7). At GKRS, the median Karnofsky performance scale score was 90 and the mean tumor volume was 1.2 cc (0.002-12.6). The mean prescription dose of 17.8 Gy was delivered to the mean 61.1% isodose line. Among 264 metastases, 175 lesions were assessed for treatment response by at least one imaging follow-up. Results : The overall median survival after GKRS was $9.1{\pm}1.7$ months. Among various factors, primary tumor control was a significant prognostic factor ($11.1{\pm}$1.3 months vs. $3.3{\pm}2.4$ months, p=0.031). The calculated local tumor control rate at 6 and 9 months after GKRS were 87.9% and 84.2%, respectively. Paddick's conformity index (>0.75) was significantly related to local tumor control. The actuarial peritumoral edema reduction rate was 22.4% at 6 months. Conclusion : According to our results, GKRS can provide beneficial effect for the patients with multiple (4 or more) brain metastases, when systemic cancer is controlled. And, careful dosimetry is essential for local tumor control. Therefore, GKRS can be considered as one of the treatment modalities for multiple brain metastase.

• 대한전기학회:학술대회논문집
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• 대한전기학회 1995년도 하계학술대회 논문집 B
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• pp.804-806
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• 1995

This paper discusses Self-organized Distributed Networks(SODN) as identifier of nonlinear dynamical systems. The structure of system identification employs series-parallel model. The identification procedure is based on a discrete-time formulation. The learning with the proposed SODN is fast and precise. Such properties arc caused from the local learning mechanism. Each local networks learns only data in a subregion. Large number of memory requirements and low generalization capability for the untrained region, which are drawbacks of conventional local network learning, are overcomed in the SODN. Through extensive simulation, SODN is shown to be effective for identification of nonlinear dynamical systems.

• 디지털융복합연구
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• 제9권3호
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• pp.191-202
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• 2011

공공기관과 지방자치단체는 방범용과 교통용, 쓰레기 무단투기용 등 다양한 형태로 CCTV를 설치하고 있다. 그 밖에도 국가행정기관이나 각급 학교, 특별법에 의한 특수법인, 지방공사 및 공단 등에서도 개별적으로 CCTV를 운영하고 있다. 이와 같이 로컬지역의 관할구역에 개별적으로 설치 및 운용되어오던 CCTV시스템이 혼재되어 있거나 도입시점이 상호 기술적 이질성이 발생한다. 행정안전부는 2011년 2월 국가영상정보자원을 위한 통합관제센터구축을 위한 가이드라인을 제시하였다. 본 연구는 행정안전부가 권고하는 가이드라인에 근거하여 2011년 4월 28일 완료 보고한 부산광역시의 경찰청, 소방청 그리고 부산시간의 통합관제센터 구축 사례를 소개한다. 기관간 통합과정에서 발생하는 문제와 선결요인은 무엇이고 해결방안을 제시한다.

• Radiation Oncology Journal
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• 제22권1호
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• pp.11-16
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• 2004

목적: 유방 관상피내암 환자들의 유방 보존술 및 방사선 치료 후 생존율과 국소 재발률, 재발 양상 및 국소 재발에 영향을 준 인자들을 분석하고, 적절한 치료법을 결정하고자 하였다. 대상 및 방법: 1995년 6월부터 2001년 12월까지 유방 관상피내암으로 유방 보존술 후 방사선 치료를 받았던 96명의 환자를 대상으로 후향적 분석을 시행하였다. 수술은 국소 절제 또는 광범위 절제가 시행되었고, 일부에서 액와 림프절 곽청술이 시행되었다. 방사선 치료는 전 유방에 50.4 Gy /28회를 조사하였고, 절단면에 종양이 있거나 절단면에서 종양이 가까웠던 경우($\leq$ 2 mm) 일부에서 종양이 있었던 부위에 $10\~14$ Gy를 추가 조사하였다. 전체 환자의 중앙 추적 관찰기간은 43개월($12\~102$개월)이었다. 결과: 5년 국소 무병생존율, 생존율은 각각 $91\%,\;100\%$였다. 국소 재발은 6명($6.3\%$)에서 발생하였고, 이 중 침윤성 유방암으로 재발한 환자는 1명이었다. 수술에서 재발까지의 기간은 1명을 제외하고는 모두 2년 이상이었다. 주위 림프절 재발이나 원격전이는 없었다. 재발한 환자 중 5명은 유방 전절제술 후 무병생존 중이고, 1명은 구제 치료예정이다. 국소 재발에 영향을 준 인자들에 대해 분석했을 때, 연령, 절단면 상태, comedo type, 핵분화도 모두 국소 재발에 영향을 주지 않는 것으로 나타났다. 수술 범위에 따라서도 국소 재발에 차이를 보이지 않았고(p=0.30), 절단면이 종양에서 가까웠던 경우 초기 종양 부위에 추가 조사도 국소 재발에 영향을 주지 않았다(p=1.0). 결론: 유방 관상피내암의 치료로 유방 보존술 및 방사선 치료 시행 후 높은 국소 제어율과 생존율을 얻을 수 있었다. 종양이 절단면을 침범하지 않는 한 절단면과 종양과의 거리와 추가 방사선 조사는 국소 재발에 영향을 주지 않는 것으로 나타났으나 향후 더 많은 환자로 장기적인 추적관찰이 필요할 것으로 생각된다.

• 한국농촌건축학회논문집
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• 제14권1호
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• pp.29-36
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• 2012

This study compares and analyzes the supporting system used in Korea and Japan to facilitate the development of maeul-mandeulgi supporting systems. And the results of comparison and analysis are as follows: First, it needs to establish the separate legal system in the city planning system and to enact the local more local autonomous ordinances to complementarily connect with the administrative system. Second, an exclusive department should be organized under direct control of the local government head. Third, the maeul-mandeulgi support center should hire the full-time employees including the experts and civil officials who are not relevant with administrative works, and the local administrative organization should lead the operation of this center while strengthening the functionality of the center to be suitable with the local situations. Fourth, it is necessary to diversify the way to proceed with the maeul-mandeulgi project, and to look for a source of financial resource instead of depending on the budget of the administrative organizations.

• Journal of Communications and Networks
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• 제16권4호
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• pp.371-377
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• 2014

Localized topology control is attractive for obtaining reduced network graphs with desirable features such as sparser connectivity and reduced transmit powers. In this paper, we focus on studying how to prolong network lifetime in the context of localized topology control for wireless multi-hop networks. For this purpose, we propose an energy efficient localized topology control algorithm. In our algorithm, each node is required to maintain its one-hop neighborhood topology. In order to achieve long network lifetime, we introduce a new metric for characterizing the energy criticality status of each link in the network. Each node independently builds a local energy-efficient spanning tree for finding a reduced neighbor set while maximally avoiding using energy-critical links in its neighborhood for the local spanning tree construction. We present the detailed design description of our algorithm. The computational complexity of the proposed algorithm is deduced to be O(mlog n), where m and n represent the number of links and nodes in a node's one-hop neighborhood, respectively. Simulation results show that our algorithm significantly outperforms existing work in terms of network lifetime.

• 한국콘텐츠학회논문지
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• 제14권4호
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• pp.180-188
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• 2014

본 연구는 지역아동센터에서 아동들에게 직접 서비스를 제공하는 핵심인력인 사회복지사의 사회적 지지가 직무만족에 미치는 영향을 분석하고자 하였다. 연구대상은 전라남도 소재의 지역아동센터에서 근무하는 사회복지사를 대상으로 설문조사를 실시하였으며, 240부를 분석자료로 활용하였다. 사회복지사의 인구통계학적 특성을 통제변수로 설정하여 사회적 지지가 직무만족에 미치는 영향을 분석한 결과 사회적 지지가 직무만족에 가장 큰 영향을 미치는 것으로 분석되었다. 이는 사회복지사의 사회적 지지가 높을수록 사회복지사의 직무만족이 높다는 것을 의미한다. 분석결과를 바탕으로 사회복지사의 사회적 지지 향상 방안으로 첫째, 지역아동센터 사회복지사들의 업무 표준화와 전문교육의 지지 강화, 둘째, 우수지역아동센터의 가산점 부여, 셋째, 동료 및 지역사회간 네트워크 협력 체계 구축을 제언으로 한다.

• Radiation Oncology Journal
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• 제30권2호
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• pp.62-69
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• 2012

Purpose: To evaluate the treatment outcome and prognostic factor of postoperative radiotherapy for extremity soft tissue sarcoma (STS). Materials and Methods: Forty three patients with extremity STS were treated with conservative surgery and postoperative radiotherapy from January 1981 to December 2010 at Korea University Medical Center. Median total 60 Gy (range, 50 to 74.4 Gy) of radiation was delivered and 7 patients were treated with chemotherapy. Results: The median follow-up period was 70 months (range, 5 to 302 months). Twelve patients (27.9%) sustained relapse of their disease. Local recurrence occurred in 3 patients (7.0%) and distant metastases developed in 10 patients (23.3%). The 5-year overall survival (OS) was 69.2% and disease free survival was 67.9%. The 5-year local relapse-free survival was 90.7% and distant relapse-free survival was 73.3%. On univariate analysis, no significant prognostic factors were associated with development of local recurrence. Histologic grade (p = 0.005) and stage (p = 0.02) influenced the development of distant metastases. Histologic grade was unique significant prognostic factor for the OS on univariate and multivariate analysis. Severe acute treatment-related complications, Common Terminology Criteria for Adverse Events (CTCAE) grade 3 or 4, developed in 6 patients (14.0%) and severe late complications in 2 patients (4.7%). Conclusion: Conservative surgery with postoperative radiotherapy achieved a satisfactory rate of local control with acceptable complication rate in extremity STS. Most failures were distant metastases that correlate with tumor grade and stage. The majority of local recurrences developed within the field. Selective dose escalation of radiotherapy or development of effective systemic treatment might be considered.

• International journal of advanced smart convergence
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• 제7권3호
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• pp.44-60
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• 2018

This study is to identify the effects of hypertension management program at a community health center on the disease-related knowledge, self-efficacy, anthropometric measurements and blood pressure of a hypertensive patient in local community. This study is a quasi-experimental study using nonequivalence control group no-synchronized design in order to verify the effects of the hypertension management program at a community health center on the hypertension-related knowledge, self-efficacy, anthropometric measurements and blood pressure of a hypertensive patient in local community. The result indicated a significant difference between the experimental group and control group in the scores of hypertension-related knowledge (t=-4.25, p<.001), self-efficacy (t=-4.20, p<.001), systolic blood pressure (t=7.70, p<.001) and diastolic blood(t=5.91, p<.001), body weight(t=2.32, p=.026) and abdominal circumference(t=2.17, p=.036). The hypertensive patients' knowledge and self-efficacy were improved, and their weight and abdominal circumference as well as systolic blood pressure and diastolic blood pressure were reduced. Therefore, it was confirmed that multilateral approaches in terms of physical and psychosocial aspects only targeting hypertensive patients were required for managing hypertensive patients in local community.

• 기본간호학회지
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• 제14권2호
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• pp.173-180
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• 2007

Purpose: The present study was done to examine the effect of music therapy on anxiety and pain in patients for whom a ureteral stent was inserted under local anesthesia. Method: The participants in this study were 22 patients who received a ureteral stent at the Day Surgery Center of C University Hospital during the period from May to October in 2006. The patients were divided into a control group (n=11) and an experimental group (n=11). For the experimental group, music was played according to their musical preference using headphones. The music was provided from the point when the patient took the posture for the operation and was covered with a sterilized drape to the point when the cystoscope was removed after finishing the operation. The control group was only provided with ordinary nursing services. Results: The results show that the provision of music therapy to these patients is effective in reducing the patients' salivary cortisol and Vas-anxiety score and stabilizing their systolic blood pressure. Conclusion: We conclude that music therapy can be actively used as a nursing intervention for reducing anxiety in patients who receive operations under local anesthesia.