주파수선택적 감쇄 채널에서 부호순위 통계량을 쓴 부호 획득 방법

김홍길,정창용,송익호,권형문,김용석,Kim, Hong-Gil,Jeong, Chang-Yong,Song, Ik-Ho,Gwon, Hyeong-Mun,Kim, Yong-Seok 대한전자공학회 2002 電子工學會論文誌-TC (Telecommunications) Vol.39 No.2

이 논문에서는 주파수선택적 라이시안 감쇄 채널에서 부호순위를 바탕으로 한 비모수 검파기를 쓰는 직접 수열 부호분할다중접속시스템의 의사잡음 부호획득 방법을 다룬다. 먼저 국소 최적 순위 검파기를 얻고, 근사점수함수를 쓴 국소 준최적 순위 검파기와 k차 고친 부호순위 검파기를 제안한다. 직렬 두 우물기법과 혼합 병렬 두 우물기법에 평균 일정오경보확률 추정기를 쓴 제곱합 검파기, 고친 부호 검파기, 국소 준최적 순위 검파기, k차 고친 부호순위 검파기를 쓴 것을 견주어 본다. 국소 준최적 순위 검파기와 k차 고친 부호순위 검파기가 평균 일정오경보확률 추정기를 쓴 제곱합 검파기보다 성능이 더 낫다는 것을 모의 실험으로 보인다. In this paper, signed-rank based nonparametric detectors are used for direct sequence code division multiple access pseudo-noise code acquisition systems in frequency-selective Rician fading channels. We first derive the locally optimum rank detector, and then propose the locally suboptimum rank (LSR) and k-th order modified signed-rank (MSRk) detectors using approximate score functions. We compare the serial and hybrid parallel double-dwell schemes using the LSR and MSRk detectors with those using the conventional squared-sum (SS) using the cell averaging constant false alarm rate processor and modified sign detectors. From the simulation results, it is shown that the LSR and MSRk detectors perform better than the SS detector using the cell averaging constant false alarm rate processor.

직접수열 부호분할 다중접속 계통에서의 비모수 의사잡음 부호 획득

김홍길,이정훈,송익호,정혜정,이성노,Kim, Hong-Gil,Lee, Jeong-Hun,Song, Ik-Ho,Jeong, Hye-Jeong,Lee, Seong-No 대한전자공학회 2000 電子工學會論文誌-TC (Telecommunications) Vol.37 No.6

이 논문에서는 직접수열 부호분할 다중접속 계통에서 의사잡음 부호를 획득하는데 알맞은 비모수 방식을 제안한다. 이 방식에서는 매개변수를 쓰지 않기 때문에 시간에 따라 바뀌는 간섭의 분산을 추정하는 과정 없이 검파기의 문턱값을 결정할 수 있다. 이제까지의 검파기와 제안한 검파기의 성능을 수식 결과와 모의 실험 결과로 견주어보았다. 이 결과로부터 간섭의 분산을 정확히 추정할 수 없을 때에는, 제안한 검파기를 쓰는 직접수열 부호분할 다중접속 계통의 성능이 이제까지의 검파기를 쓸 때보다 좋음을 보였다. In this paper, we propose to use nonparametric detector for the PN code acquisition in DS/CDMA systems. Because the detector is nonparametric, Ive can decide the threshold of the detector without first haying to estimate the valiance of time-varying interference. We compare the proposed detector with the conventional detector by showing both analytic and simulation results. From these results, we can observe that the DS/CDMA system with the proposed detector have better performance than that with the conventional detector when the exact estimation of the interference variance is not possible.

가상현실 게임을 적용한 물리치료가 무릎 수술 후 환자의 통증, 기능 변화, 삶의 질, 동기부여에 미치는 영향

김홍길,정주현,Hong-Gil Kim,Ju-Hyeon Jung 대한고유수용성신경근촉진법학회 2023 PNF and Movement Vol.21 No.3

Purpose: The aim of this study was to investigate the effects of physical therapy combined with a virtual reality (VR) game on pain, quality of life (QOL), engagement, and knee function in post-knee-surgery patients. Methods: Twenty-four patients who had undergone knee surgery four weeks or more before the study were recruited. Two withdrew from the study during the four-week experimental period, and a total of 22 patients were included in the final analysis. Routine physical therapy consisting of electrostimulation (10 min.) and therapeutic massage (10 min.) was the base intervention for all groups. The experimental group (n = 10) was additionally exposed to a VR game intervention, while the control group (n = 12) underwent an intervention involving similar motions as the experimental intervention but with no VR. The intervention for the experimental group used the game Rig Fit Adventure on Nintendo switch. Both groups underwent their respective interventions 3 times a week (35 min. per session) for 4 weeks. Pain was assessed using the numeric rating scale (NRS), and QOL was assessed using the EuroQol five-dimensional five-level questionnaire (EQ-5D-5L). Engagement was assessed using the Korea flow state scale (K-FSS). Finally, knee movement and function were assessed based on knee flexion and extension, range of motion (ROM), and Western Ontario and McMaster Universities Arthritis Index (WOMAC). Results: After the four-week physical therapy, both groups showed significant reductions in pain (on the NRS), increased knee ROM (flexion), better WOMAC scores, and increased EQ-5D-5L scores (p < 0.05), with the experimental group showing significantly better improvements in EQ-5D-5L and K-FSS scores (p < 0.05). Conclusion: The results of this study confirm that a VR-game-integrated intervention is effective for improving pain, QOL, engagement, and knee function in post-knee surgery patients and that VR-game-integrated interventions could be therapeutic alternatives for patients bedridden for prolonged periods with little motivation for rehabilitation.

[음성 신호처리 및 신호분석] 중앙값을 움직인 부호 검파기의 접근 성능

김홍길(Hong Gil Kim),윤석호(Seok Ho Yoon),김윤희(Yun Hee Kim),송익호(Iickho Song),김형명(Hyung Myung Kim) 한국통신학회 1997 한국통신학회 학술대회논문집 Vol.1997 No.11

AHP를 활용한 국내 커피전문점 사업의 KPI 우선순위 및 가중치 개발

김홍길(Hong Kil Kim),김학준(Hak Jun Kim) 한국호텔외식관광경영학회 2012 호텔경영학연구 Vol.21 No.5

The objective of this research is to develop the priority and importance weight of each developed Key performance indicator (KPI), as a follow-up of Kim, Park, and Kim (2012) study on developing KPIs, both financial and non-financial, which allow for ``selection and concentration management`` with limited capital for the purpose of maintaining an advantageous position in the highly competitive coffee shop business. This research demonstrates that ``financial perspective`` got the highest weight (0.530) as a result of measuring the relative importance of each of the four perspectives, which is the second class, and that according to the measurement of the relative importance within each perspective, the third class, Gross Operating Profit from ``financial perspective`` got the highest weight (0.358), and then Customer Satisfaction from ``customer perspective``, CEO Leadership from ``internal processes perspective``, Employee Satisfaction from ``learning & growth perspective`` have got the 0.424, 0.450, and 0.353 as their weight respectively. Regarding results of the overall KPIs the weight of Gross Operation Profit is the highest (0.190), and then are Gross Revenue, Customer Satisfaction and Employee Satisfaction. The implications of this research are that ``learning & growth perspective`` is regarded more important than ``customer perspective`` in relation to the relative importance of each perspective, the second class, because even though coffee shop business is in the service industry, baristas`` technical skills are important. Since the coffee shop segment is relatively small-scaled within the service industry, furthermore, CEO Leadership from ``internal processes perspective`` is judged highly important with the weight of 45%. This study reflects that once the realistic profit is gained, Customer Satisfaction and Employee Satisfaction should be achieved for the sustainable coffee shop business. Key words : coffee shop business, KPI, Analytic Hierarchy Process.

AHP를 활용한 국내 위탁급식사업의 KPI 우선순위 및 가중치개발에 관한 연구

김학준(Hak Jun Kim),김홍길(Hong Kil Kim),김대관(Dae Kwan Kim) 한국관광연구학회 2011 관광연구저널 Vol.25 No.4

The contracted foodservice business as an intangible service industry requires measurement in intangible values. By these measurements the limited capitals should be selected and invested to differentiate itself from competitors and secure competitiveness. Currently, there are items to evaluate the present, future, and past of the Contracted Foodservice Business, however no academically established priority of the items. The purpose of this research, a follow-up research of Kim, Hak-Jun & Kim, Ju-Yeon(2009) is development on significancy and priority of KPI in Korea. As a result of the study, customer perspective was understood to be most important, next financial perspective, internal process, and lastly the learning and growth perspective. KPI`s priority consists of customer satisfaction measurement in first place with a significant rate of 0.187. Next, following up was achieved profit targets and achieved sales goals. The results implicate that in the contracted foodservice business in Korea the business strategy should select and invest in limited capitals by investing in the increased customer satisfaction measurement and corresponding to the needs and wants of the customer to increase customer satisfaction measurement.

다크투어리즘 유산의 현황과 활용에 관한 연구 -제주 4·3 유적지 구성요소를 중심으로-

김홍길 ( Kim Hong-kil ) 한국사진지리학회 2021 한국사진지리학회지 Vol.31 No.4

본 논문은 제주 역사를 돌아보는 다크투어유산과 흔적이 투영된 제주지역에 대한 현장연구이다. 제주 4·3 사건은 경찰 탄압에 대한 저항과 단독 선거, 단독 정부 반대를 기치로 발생한 무력충돌과 진압과정에서 주민들이 희생당한 사건으로 73주년을 맞이하였다. 천혜의 자연을 품고 있는 평화로움의 상징인 제주이지만 제주 4·3 유적지를 비롯해 수많은 다크투어 유적지가 존재하고 있다. 역사라는 이름 아래 왜곡되거나 소외되었던 개개인의 삶을 조명하고, 과거에 발생한 역사적 사건을 바르게 알리고 전승하는 것이 필요하다. 다크투어는 지난 20여 년간 국내·외 역사 관광의 일환으로 꾸준히 연구가 이루어지고 있으나, 체계적인 이론적 기반이 부족한 채로 사례 위주의 연구가 대다수를 차지하고 있다. 제주 4·3 사건에 대한 다크투어는 역사적 사건과 함께 짚어보는 시간 속에서 죽음을 받아들이는 하나의 비극의 형태로서 지난 2003년 노무현 정부에서 제주 4·3 사건을 ‘단독정부 수립 반대와 연계된 남로당 제주도당의 무장봉기가 있었고, 이를 진압하는 과정에서 무고한 주민들이 희생된 사건’으로 정의한 이후 이번 정부에서는 제주 4·3 특별법 개정안이 통과되었다. 재해나 대참사의 뒤에 부흥하는 지역 관광산업을 돕는 반발력의 구조가 될 수 있는 계기로 가슴 아픈 제주 역사를 돌아보는 제주다크투어 유적지가 체계적으로 관리되고 보전되어야 할 것이다. This paper is an on-site study of the Jeju area, which reflects the dark tour heritage and traces of Jeju history. The Jeju 4·3 incident marked the 73rd anniversary of the incident in which residents were sacrificed during armed clashes and suppression under the banner of resistance to police oppression, independent elections, and opposition to the dictatorship. Jeju Island, which is a symbol of peace with natural nature, is sure to be Korea’s representative tourist destination. There are many dark tour sites including the Jeju 4·3 site, but it is first necessary to illuminate the lives of individuals who have been distorted or alienated under the name of history, inform the true historical events of the past, and transfer memories. These dark tours have been steadily researching domestic and foreign historical tourism for the past two decades, but with a lack of systematic theoretical foundation, most of them are case-type-oriented studies. After defining the 4·3 case adopted by the Roh Moo-hyun administration in 2003 as ‘there was an armed uprising by the Jeju Do Party of the Namro Party in connection with opposition to the dictatorship, and innocent residents were sacrificed at the same time’, the amendment to the Jeju 4·3 Special Act was passed. The Jeju Dark Tour site, which looks back on the painful history o f Jeju, should be systematically p reserved and accurately guided. A s tudy t hat discusses that the dark tour of the Jeju 4·3 Incident can be a structure of repulsion to help the local tourism industry reviving after a disaster or catastrophe as a form of tragedy that accepts death in the time looking at it with historical events.

명대 북경의 매판과 (買辦) 단가 (短價)

김홍길(Hong Gil Kim) 명청사학회 1996 명청사연구 Vol.5 No.1

N/A

중국 일본인이 선호한 해외의료관광국가 선택 영향요인에 대한 비교 연구

김홍길(Kim, Hong-KIL),데이브리(David Lee) 한국관광레저학회 2015 관광레저연구 Vol.27 No.1

아버지의 부모역할지능과 훈육방식 간의 관계

김홍길(Kim Hong-gil),백경순(Baek Kyung-sun) 한국교원대학교 유아교육연구소 2019 한국유아교육연구 Vol.21 No.2

본 연구는 아버지가 지각하는 부모역할지능이 자녀 훈육방식에 미치는 영향은 어떠하며, 부모역할지능의 상위 집단과 하위 집단에 따른 훈육방식의 차이를 분석하는 데 목적이 있다. D시의 유치원 및 어린이집에 다니는 만4세 유아의 아버지를 대상으로 설문조사를 실시하였고, 총 210부의 자료를 상관관계, 회귀분석을 실시하였다. 또한 부모역할지능의 상위와 하위집단을 각각 30%로 나누어, 각각의 훈육방식의 차이를 검증하기 위해 t-검증을 실시하였다. 연구결과, 첫째, 아버지의 부모역할지능 중에서 거부와 관리 통제는 훈육방식의 강압적 체벌과 방임에게 부정적 상관관계를 보였으며, 부모역할지능 중에서 수용은 훈육방식의 논리적 설득에 긍정적 상관관계를 나타내었다. 또한 아버지의 부모역할지능 중 거부와 관리통제는 훈육방식의 강압적 체벌과 방임을, 부모역할지능 중 수용과 관리통제는 훈육방식의 논리적 설득을 유의미하게 설명하는 예측변인이었다. 두 번째로, 아버지의 부모역할지능의 상하집단의 차이가 유의미하게 나타났으며, 상집단이 하집단보다 논리적 설득이 더 높게 나타났고, 하집단은 상집단에 비해 강압적 체벌과 방임이 높은 결과가 나타나는 차이를 보였다. 그러므로 아버지들의 바람직한 훈육방식을 갖도록 부모역할지능을 발달시키는 실제적인 방안을 모색하여야 한다. The purpose of this study is to explore the effect of parental intelligence perceived by fathers on their disciplinary style. The data was collected from 210 fathers of four-year-old children who were attending kindergartens or child care centers in a D city. Data were analyzed by a correlation analysis and regression analysis. The t-test was used to verify the difference of parental disciplinary style by dividing upper and lower parental intelligence groups into 30%. The findings are as follows: 1) the rejection and the management control among the parental intelligence had the negative correlation with the forceful punishment and the neglect disciplinary style. Acceptance in parental intelligence showed a positive correlation with the logical persuasion of parental disciplinary style. In addition, the rejection and the management control in parental intelligence were significant variables on the punishment and the neglection of parental disciplinary style. Moreover, the management control of parental intelligence was a predictive variable to explain relation to the logical persuasion. 2) It was revealed that there were significant differences between the upper parental intelligence group and the lower group in the scores of parental intelligence. Data also showed that the upper parental intelligence group had higher scores in logical persuasion than lower group. However the lower parental intelligence group showed higher scores in the forceful punishment and the neglect discipline style.