5G 이동통신 기술의 현황 및 전망

이주용,조동호 에스케이텔레콤 (주) 2014 Telecommunications Review Vol.24 No.2

5세대 이동통신은 현재 4세대 이동통신 대비 1000배의 무선 용량 지원과 1000배의 전송 에너지 절감 및 1000배의 디바이스 수용을 요구하고 있다. 무선 용량 증대 및 전송 에너지 효율의 향상을 위해서는 소형셀 중심의 망으로 진화가 필요하며 수많은 소형셀들의 효과적인 연동을 위해서 무선 백홀망의 구성 및 소형셀 들간 간섭 제어 기술이 필요하다. 또한 수십, 수백개의 많은 안테나를 사용하는 것은 주파수 효율과 에너지 효율을 높일 수 있는 기술로 주목을 받고 있다. 하지만 다수의 안테나의 활용은 모뎀 사용의 복잡도와 함께 RF chain의 복잡도를 가져올 수 있기 때문에 디지탈 빔포밍과 아날로그 빔포밍을 절충한 하이브리드 빔포밍 기술과 함께 빔공간 MIMO 기술이 중요해지고 있다.

성피해의 심리적 후유증에 관한 연구 -성적 영역을 중심으로-

이주용,김정규 한국여성심리학회 2006 한국심리학회지 여성 Vol.11 No.4

To find that how the sexual abuse has affected adulthood sexual behavior and how change the aspects in process of time, this study was intended to integrate interpretation of the quantitative and qualitative results. The quantitative study was administered to 20~50 aged 144 women, and were used ‘The sexual concept and sexual behavior questionnaire’ and ‘Self esteem scale’. The qualitative study was analized recording files of depth interview done to 5 women experienced several sexual abuse. In the result of this study, it was found that the victims of sexual abuse had little awareness of the situation was sexual abuse, and they become to know that the situations they sufferd were. Then, They interested and stydied in sex, and they conforms of their worries as sexual actions. The results increased percentage of sexual actions in sexual abused women before marriage. Victims that experienced several sexual abuse, have negative feelings of their sexual body-part, low insensibility of orgasm, more complain of sexual dysfunction, and it related to decreasing of sensibility about body awareness. Although women victims have low self-esteem, and they positioned and experienced in adverse condition repeatedly, they experiences stability, intimacy and sufficiency after sexual actions with love.

ATM 망에서 ABR 서비스를 위한 예측 트래픽 제어

이주용 서강전문대학 2000 산업과학연구 Vol.2 No.-

ATM(Asynchronous Transfer Mode) forum has defined a service class for data applications called available bit rate(ABR) service, which has highly bursty traffic and unpredictable burst size. It is desirable that we reduce the probability of retransmission of packets by minimizing the loss of cells because the traffic is much more sensitive to loss than delay. ATM can be efficiently used to transport packet data services. The switching system will support voice and packet data services simultaneously from end to end applications. To guarantee quality of service(QoS) of offered services, the source rate to send packet data is needed to control the network overload condition. Most existing control algorithms are shown to provide the threshold-based feedback control technique. An adaptive algorithm based on the optimal least mean square error technique is presented for the predictive feedback control technique. This algorithm attempts to predict a future buffer size from weight (slope) adaptation of unknown functions, which are used for feedback control. Simulation results are presented, which show the effectiveness of this algorithm.

원과 타원을 검출하기 위한 하프변환

이주용 서강정보대학 1995 論文集 Vol.14 No.-

The Hough transform is a robust technique which is useful in deteching strait lines in an edge-enhanced picture. However, the extension of the conventional Hough transform to recover circles and ellipses has been limited by slow speed and excessive memory size of the accumulator array. Based on these techniques, only a 2-dimensional array is needed for the detection of circles and ellipses. The approach centres on the use of parallel edge points and a method on reducing the dimension of the accumulator array.

노인의 사회활동 참여효과와 참여만족도가 복지의식에 미치는 영향 연구

이주용 한국인간복지실천학회 2021 한국인간복지실천연구 Vol.27 No.-

노인의 사회활동에 대한 사회적 요구는 강조되고 있으며 노인의 사회활동을 통해 갖 는 효과성과 만족도는 정부에 대한 복지의식으로 귀결됨을 알아봄으로써 노인의 사회활 동 관련 프로그램의 개발과 복지의식의 향상과 삶의 질 향상에 이바지하고자 한다. 본 연구를 위해 60세 이상 노인 452명을 대상으로 자기기입식 설문조사를 실시한 결과 참 여만족도가 높을수록 복지의식의 정책평가는 높은 것으로 참여효과가 높을수록 복지의 식의 성장과 분배는 높아지는 것으로 조사되었으며 노인의 사회활동 참여에 따른 참여 만족도는 복지의식에 미치는 영향이 미약하지만 참여효과는 복지의식에 미치는 영향이 유의하다는 연구결과가 도출되었다. 따라서 노인은 지역사회에 참여함으로써 사회적 역 할에 대한 인식을 고양하고 삶의 만족도를 증진함으로써 성공적 노후에 이바지하고 다 양한 분야에서 사회구성원의 일원으로 노인의 역할을 강화하고 복지정책과 제도 및 수 행기관의 다각도의 연구와 변화가 요구된다 할 것이다. As the social demands for social activities of the elderly are being emphasized. The purpose of this study is to contribute to the development of social activities-related programs for the elderly, improvement of welfare awareness and quality of life by observing that the effectiveness and satisfaction of the elderly through social activities results in welfare awareness toward the government. For this study, a self-written questionnaire survey was conducted on 452 elderly people aged 60 or older. As a result, the higher the satisfaction of participation, the higher the policy evaluation of welfare consciousness, an the higher the participation effect, the higher the growth and distribution of welfare consciousness. Therefore, it was concluded that the effect of participation satisfaction according to participation in social activities of the elderly has a weak effect on welfare consciousness, but the effect of participation effect on welfare consciousness is significant. Therefore, the elderly contribute to their successful retirement by raising awareness of their social role by participating in the local community and enhancing life satisfaction, strengthening the role of the elderly as members of society in various fields. Thus, various studies and changes in welfare policies, would be necessary.

Baseline Characteristics and Risk Factors of Retinal Vein Occlusion: A Study by the Korean RVO Study Group

이주용,윤영희,김하경,윤희성,강세웅,김중곤,박규형,조영준 대한의학회 2013 Journal of Korean medical science Vol.28 No.1

We investigated the demographic characteristics and risk factors of Korean patients with naïve central or branch retinal vein occlusion (CRVO or BRVO). This study enrolled 41clinical sites throughout Korea and included 557 consecutive patients with retinal vein occlusion (RVO) from May through November 2010. A total of 557 patients with newonset RVO participated in this study. Two hundred and three (36.4%) patients were diagnosed with CRVO and 354 (63.6%) patients were diagnosed with BRVO. Comparisons between the two groups showed that the prevalence of diabetes mellitus was significantly higher in CRVO patients and hypertension was significantly higher in BRVO patients (P = 0.001 and 0.002, respectively). Poor baseline visual acuity was significantly associated with female and old age in BRVO patients (P = 0.002 and 0.013, respectively), whereas the wide intraretinal hemorrhage (CRVO, P = 0.029; BRVO, P < 0.001) and the macular ischemia (CRVO, P < 0.001; BRVO, P < 0.001) were associated with both groups. The study results show the clinical features of RVO in Korean patients. Hypertension is strongly associated with BRVO and diabetes mellitus is more strongly associated with CRVO in Korean patients with RVO. As the first nationwide study performed by the Korean Retinal Society, the results of this study can be applied to future studies on RVO.

Quality Assessment of Randomized Controlled Trials Published in the Korean Journal of Urology Over the Past 20 Years

이주용,정재훈,강동혁,이정우,문홍상,유탁근,최홍용,이승욱 대한비뇨의학회 2011 Investigative and Clinical Urology Vol.52 No.9

Purpose: Because low-quality trials may lead to erroneous conclusions, quality assessments are necessary. Thus, in this study, we scrutinized randomized controlled trials (RCTs) published in the Korean Journal of Urology (KJU) to assess their quantity and quality. Materials and Methods: Upon extracting RCTs from all articles published in the KJU from 1991 to 2010, assessments were made on the basis of the Jadad scale and the adequacy of allocation concealment. The selections and assessments were performed independently by two researchers, and adjustment of the differences was done by a third-party researcher. In addition, the factors that may affect quality were analyzed. Results: A total of 3,516 original articles were searched and 28 RCTs were extracted. In the 1990s, RCTs constituted only 0.27% of the total original articles, but in the 2000s, RCTs constituted 1.34%. The mean total Jadad score increased from 1.6 points in the 1990s to 1.65 points in the 2000s. However, the percentage of "good quality" trials also increased from 20% to 30.43%. As for adequate allocation concealment, one study was observed in the 2000s. The aspect most lacking was appropriate dropout and double-blinding. Studies with medical interventions or funded or examined by institutional review boards tended to receive higher quality assessments. Conclusions: Although RCTs consistently increased in both quantity and quality, in future studies, researchers should continue to strive toward achieving adequate allocation concealment and appropriate double-blinding. In addition, researchers must become more interested in receiving external funding and undergoing examination by institutional review boards.

전투적으로 전진할 것인가, 비참하게 패배할 것인가

이주용 노동사회과학연구소 2011 정세와노동 Vol.- No.71

노인의 사회적 자본에 대한 고찰

이주용 한국인간복지실천학회 2020 한국인간복지실천연구 Vol.25 No.-

본 논문은 베이붐세대의 본격적인 노령인구에 진입함으로써 노인부양에 대한 사회적 부담에 대한 개인적⋅사회적 해결방안으로 사회적 자본의 확충과 증대에 중요성을 부각시키고 이를 민⋅관이 협력적인 구조를 통해 정책의 수반과 정부에 대한 호혜적 신뢰로 상호 상생할 수 있는 구조로 발전시켜 나가야 할 것이다. 이에 노인의 사회적, 심리적, 정서적, 신체적인 노인문제가 개인과 사회의 과제로 건강하고 행복한 노인의 삶에 대한 다양한 지원체계가 지속적으로 필요하게 되었다. 사회적 자본은 실체적인 측면보다는 사회적 관계 속에서 각 개인이 가지고 있는 네트워크와 사회참여를 통해 획득될 수 있는 다양한 사회적 기회자원이라고 할 수 있다. 노년기의 긍정적인 삶에 대한 욕구는 개인적 차원을 넘어서 사회적으로 중요한 패러다임으로 사회적 자본은 노인이 사회적 관계 속에서 신뢰, 참여, 규범에 긍정적인 영향을 줄 수 있고 이는 성공적 노화에 이를 수 있도록 하며 노인의 일자리 및 사회활동, 문화활동, 여가활동, 자원봉사활동 등을 통해 동기 부여를 제공하는데 사회적 자본이 중요한 영향 관계에 있음을 확인할 수 있었다. 따라서 노인의 사회적 자본은 고령사회에 사회통합과 심리⋅사회적, 신체적 문제와 빈곤을 예방 하고 노후의 만족한 삶을 영위하기 위해 사회적 기회를 충족할 수 있는 중요한 요인임을 시사하고 있다.야 한다. 셋째, 사회적지지 프로그램을 활성화할 수 있는 다각적인 모색이 필요하다. This study intends to emphasize the importance of expanding and increasing social capital as a personal social solution for social burden of supporting the elderly as the baby boom generation enters the aging population, and will have to develop into a structure of coexistence based on policies and reciprocal trust in the government through mutually compatible structure between the public and private sectors. Therefore, social, psychological, mental, and physical problems of the elderly became a social task and various support systems for healthy and happy lives of the elderly became necessary. Social capital is a variety of social opportunity resources that can be acquired through the network and social engagement that each individual has in social relationships rather than the substantial aspect. The desire for positive life in old age is a social paradigm that goes beyond personal dimensions. Social capital makes the elderly to make positive effects on trust, participation, and regulation in social relationship that allow the elderly to reach successful aging, and this study identified that social capital is an important influence in providing jobs for the elderly and motivation through social, cultural, leisure, and volunteer activities. Therefore, this study suggests that social capital of the elderly is an important factor for meeting social opportunities as social integration, for preventing psychological, social, and physical problems and poverty, and to lead a satisfying life in their old age.

Identifying Potentially Conflicting Files by Predicting Change Probability Using Change Log Data

이주용,오상현,홍유석 대한산업공학회 2019 대한산업공학회 추계학술대회논문집 Vol.2019 No.11