• 한국병원경영학회지
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• 제20권4호
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• pp.50-61
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• 2015

Advances in healthcare technology and rapid economic growth lead to the increased life expectancy and consequently the size of elderly population. Korea is one of the countries that are rapidly aging. Thus, it is particularly important to prepare for the aging society. Recently, the number of healthcare institutions for the elderly citizens has increased. The purpose of selecting a hospital for the elderly is, in general, maintenance of health rather than improvement of health receiving proper treatment. Unlike choosing a hospital for treatment, customers of a long term care hospital have a different set of factors to consider. Especially, when choosing a long term care hospital, the influence of patient's family is greater than the patient. This study examines the factors they consider for long term care hospital. A total of 198 questionnaires were collected from the families of actual patients of long term care hospitals. Twelve questionnaires were found to be non-usable because of missing and unsatisfactory responses. Consequently, 186 questionnaires were used for the analyses. Findings of this study are as follows. First, seven factors have been identified to consider when choosing a long term care hospital for the elderly. They include convenience of facilities, costs variety of facility programs, service hours, reputation, accessibility, quality of medical staff, medical facilities, and facility size. Second, This study measured both importance and satisfaction with these attributes and analyzed the difference between them. Satisfaction was lower than importance in the categories of convenience of facilities, costs, and programs, and accessibility. On the other hand, satisfaction was higher in terms of service hours, reputation, and quality of medical staff. Finally, the current study found positive impact of accessibility and quality of medical staff on reuse intention of a long term care hospital.

• Archives of Plastic Surgery
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• 제47권6호
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• pp.551-558
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• 2020

Background Giant congenital melanocytic nevus (GCMN) is a rare disease, for which complete surgical resection is recommended. However, the size of the lesions presents problems for the management of the condition. The most popular approach is to use a tissue expander; however, single-stage expansion in reconstructive surgery for GCMN cannot always address the entire defect. Few reports have compared tissue expansion techniques. The present study compared single and serial expansion to analyze the risk factors for complications and the surgical outcomes of the two techniques. Methods We retrospectively reviewed the medical charts of patients who underwent tissue expander reconstruction between March 2011 and July 2019. Serial expansion was indicated in cases of anatomically obvious defects after the first expansion, limited skin expansion with two more expander insertions, or capsular contracture after removal of the first expander. Results Fifty-five patients (88 cases) were analyzed, of whom 31 underwent serial expansion. The number of expanders inserted was higher in the serial-expansion group (P<0.001). The back and lower extremities were the most common locations for single and serial expansion, respectively (P =0.043). Multivariate analysis showed that sex (odds ratio [OR], 0.257; P=0.015), expander size (OR, 1.016; P=0.015), and inflation volume (OR, 0.987; P=0.015) were risk factors for complications. Conclusions Serial expansion is a good option for GCMN management. We demonstrated that large-sized expanders and large inflation volumes can lead to complications, and therefore require risk-reducing strategies. Nonetheless, serial expansion with proper management is appropriate for certain patients and can provide aesthetically satisfactory outcomes.

• 대한전자공학회논문지SD
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• 제47권4호
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• pp.34-40
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• 2010

본 논문에서는 H.264/AVC에서 구문 요소의 저장 공간을 줄인 효율적인 CABAC 부호화기를 제안하였다. 제안하는 구조는 모든 블록을 하드웨어 기반으로 설계하여 프로세서에 의존하지 않고 빠른 처리가 가능하다. 또한 CABAC 부호화기의 문맥 모델러에서는 문맥 모델을 유도하기 위해 이웃 블록의 데이터가 필요한데 이웃 블록 데이터를 가공하지 않은 상태로 전부 저장하게 된다면 메모리 용량이 비효율적으로 커지게 된다. 따라서 본 논문에서는 이웃 블록 데이터를 효율적으로 저장하여 메모리 크기를 감소시키는 방법을 사용한다. 제안하는 CABAC 부호화기는 0.18um 표준 셀 라이브러리를 이용하여 합성한 결과 35,463 게이트의 면적을 사용하였으며, 최대 180MHz까지 동작이 가능하고 입력 심벌 당 소요되는 사이클 수는 약 1에 가깝다.

• 한국항행학회논문지
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• 제17권6호
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• pp.646-651
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• 2013

본 논문에서는 집중소자인 캐패시터 및 저항을 사용하여 특성조절이 가능한 소형 역-F 안테나를 제안하였다. 캐패시터는 안테나 크기 및 공진주파수의 조절을 위해 안테나 종단과 접지면 사이에 삽입된다. 반면에 $0{\Omega}$ 저항은 접지면과 단락되는 선로를 대체하여 구현한 것으로써, 단락점의 위치 이동은 안테나의 입력임피던스를 변화시킬 수 있다. 따라서 구조의 재설계 없이도 적절한 캐패시터 및 단락점 위치 선택으로 최적의 안테나 특성을 얻을 수 있다. 이와 같은 본 논문의 타당성 검증을 위하여 2.4 GHz 대역용 안테나를 설계 및 제작하여 지그비 무선 리모컨의 한 제품에 적용하였다. 적용된 안테나의 크기는 $8.5{\times}4.5mm^2$이며 재설계 없이도 대역폭 150 MHz 및 이득 2 dBi의 측정결과를 얻을 수 있다.

• 한국병원경영학회지
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• 제12권4호
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• pp.1-21
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• 2007

The relaxation of the regulation in selection of medical institution allows patients to use their own judgement in choosing proper institution for their diseases. Since the change of the regulation, there should have been many changes in medical institution selection behavior. The analysis of the change in disease specific selection pattern is critical because there be an optimal selection criteria that ensure the efficient and effective utilization of medical resources. This study analysis the institution selection factors by comparing the choice among the cases of acute diseases, the cases of chronic diseases, inpatient services, outpatient services, and emergency medical service. The comparisons performed in terms of size, class and other characteristics of medical institutions. For the study the nationally surveyed database was used and the data were analyzed using logistic regression procedure. The results indicates that the primary care facilities were not properly utilized. This study speculates that the reason for the undesirable pattern of utilization is that the roles of primary care facilities in the healthcare delivery system was not clearly defined. Based on the results, the medical policy implications are discussed.

• Geomechanics and Engineering
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• 재33권6호
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• pp.567-581
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• 2023

The prediction and achievement of a proper rock fragmentation size is the main challenge of blasting operations in surface mines. This is because an optimum size distribution can optimize the overall mine/plant economics. To this end, this study attempts to develop four improved artificial intelligence models to predict rock fragmentation through cascaded forward neural network (CFNN) and radial basis function neural network (RBFNN) models. In this regards, the CFNN was trained by the Levenberg-Marquardt algorithm (LMA) and Conjugate gradient backpropagation (CGP). Further, the RBFNN was optimized by the Dragonfly Algorithm (DA) and teaching-learning-based optimization (TLBO). For developing the models, the database required was collected from the Midouk copper mine, Iran. After modeling, the statistical functions were computed to check the accuracy of the models, and the root mean square errors (RMSEs) of CFNN-LMA, CFNN-CGP, RBFNN-DA, and RBFNN-TLBO were obtained as 1.0656, 1.9698, 2.2235, and 1.6216, respectively. Accordingly, CFNN-LMA, with the lowest RMSE, was determined as the model with the best prediction results among the four examined in this study.

• International Journal of Human Ecology
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• 제9권2호
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• pp.107-116
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• 2008

A new movement in forming community villages for better living standards is becoming popular. In order to sustain a proper community, it is essential to design proper community programs and facilities, which can encourage the proactive participation of residents. In this study, detailed aspects of the Mindlre (Dandelion) community (including formation process and management of the village) are investigated. The Mindlre community is a successful community village in Korea concerned with residents' participation and community activities. The community is located in Sancheong, Gyungsangnamdo province in Korea. The study methods are references, field trips, and interviews with residents. Six areas were surveyed and investigated: the physical environment of the Mindlre community and eco-friendly elements, respondents' background and the motivation to join, residents composition, residents' participation in the formation process of the community, self-management systems and common activities, and residents's life satisfaction. The mindlre Community was founded on Christian religions faith. The primary idea of this village was building a new hope for rural areas without discrimination. The size of the village was expanded with housing for teachers and students who were linked with the Mindlre School (substitution school). When the community was founded, existing shapes of the village were preserved. The village was physically renovated based on the original environment, in addition nature friendly materials and methods were used. The residents were proactively involved in the community through regular meetings, self-regulation, and community worship. Although the survey results should that most residents were highly satisfied with living standards, there seemed to be no clear division between community facilities and private houses. A systematic and detailed space planning technique was required. In addition, various community facilities are required due to the expansion of the community.

• Radiation Oncology Journal
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• 제11권2호
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• pp.439-448
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• 1993

Leksell 감마나이프(B-형)가 1992년 3월 경희대학교 의과대학 병원에 설치되었다. 선택적 빔 Plugging방법을 이용하여 정상 민감 조직에 대한 저선량 분포를 현저히 줄일 수 있으며, 또한 치료 부위에 더 좋은 선량 분포를 얻을 수 있다. 저선량에 대한 여러가지 선량 분포의 변화에 대한 연구를 하였으며, 사용중인 KULA프로그램의 선량 분포 곡선을 평가하기 위해 필름을 이용한 방사선량 계측을 실시하였고, RFA-3자동 밀도 측정기를 이용하여 평가하였다. 1992년 3월부터 1993년 2월까지 1년동안 100명의 환자중 17명의 환자에 선택적 빔 차폐 방법이 적용되었다. 고선량 영역에서는 측정값과 프로그램에서 제공된 선량 분포가 잘 일치하였다. 뇌하수체 선종의 치료시 치료 부위가 클 경우에는 본 연구 방법의 적용이 매우 중요시 되었으며, 반면에 치료 영역이 작을 경우에는 적절한 헬맷의 선택이 중요함을 알 수 있었다. 치료 환자의 중요 민감 장기의 방사선 선량 평가에서는 뇌간에 3~12 Gy, 시신경 교차에 3~11.2 Gy이었다. 중추신경계 영역의 최적화된 치료를 위하여 다양한 Plugging형태를 임상에 적용하는 것이 방사선에 민감한 정상 조직을 보호하기 위해 매우 중요한 인자가 됨을 알았다.

• 한국콘텐츠학회논문지
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• 제22권10호
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• pp.827-839
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• 2022

스마트폰중독에 가장 취약한 집단으로 알려져 있는 초기청소년의 스마트폰의존에 대한 심각성이 증가하고 있다. 본 연구에서는 초기청소년의 스마트폰 의존도 영향요인을 초등학생과 중학생을 구분하여 분석하고자 하였다. 연구목적을 위해 2018년 한국아동청소년패널조사의 1차 조사 자료를 활용하였으며 초등학교 4학년 2,607명과 중학교 1학년 2,590명이 최종적으로 분석에 활용되었다. 초등학생과 중학생의 스마트폰의존도에 공통적으로 영향을 미치는 요인은 성별, 자아존중감, 공격성, 부모와 함께 보내는 시간, 부정적 양육태도로 나타났다. 한편 지역(규모), 경제수준, 건강상태, 학교생활만족도, 교사관계는 초등학생의 스마트폰의존도에는 유의하였으나 중학생에게는 유의하지 않았다. 중학생에게서는 부모의 긍정적 양육태도가 유의하였다. 분석결과를 바탕으로 초기청소년들의 올바른 스마트폰 사용을 장려하기 위한 정책수립 및 사회서비스제공에 대한 함의를 도출하였다.

• Interdisciplinary Bio Central
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• 제2권2호
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• pp.6.1-6.5
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• 2010

Fragment molecular orbital (FMO) method provides a novel tool for ab initio calculations of large biomolecules. This method overcomes the size limitation difficulties in conventional molecular orbital methods and has several advantages compared to classical force field approaches. While there are many features in this method, we here focus on explaining the issues related to protein-ligand binding: FMO method provides useful interaction-analysis tools such as IFIE, CAFI and FILM. FMO calculations can provide not only binding energies, which are well correlated with experimental binding affinity, but also QSAR descriptors. In addition, FMO-derived charges improve the descriptions of electrostatic properties and the correlations between docking scores and experimental binding affinities. These calculations can be performed by the ABINIT-MPX program and the calculation results can be visualized by its proper BioStation Viewer. The acceleration of FMO calculations on various computer facilities is ongoing, and we are also developing methods to deal with cytochrome P450, which belongs to the family of drug metabolic enzymes.