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Haesoo Kim,HongJin Jeon,JaeNam Bae,MaengJe Cho,SeongJin Cho,Hyochul Lee,JinPyo Hong 대한신경정신의학회 2018 PSYCHIATRY INVESTIGATION Vol.15 No.3
Objective The purpose of the present study was to investigate the association between Body Mass Index, suicide, perceived stress, and life dissatisfaction in a general population sample of Korean adults. Methods A total of 6,022 nationally representative adults aged 18 to 74 were selected using a multistage cross-sectional cluster sampling method. Questionnaires regarding suicide behaviors, perceived stress, and life satisfaction were completed by the participants. They also reported their heights and weights, which were used to calculate BMI. Psychiatric disorders were diagnosed according to the Diagnostic and Statistical Manual of Mental Disorders, Fourth Edition, using the Korean version of the Composite International Diagnostic Interview. Results The results showed that being underweight was associated with higher risk for suicide ideation [odds ratio (OR), 1.6; 95% confidence interval (Cl), 1.18-2.05] and suicide attempt (OR, 2.0, 95% Cl, 1.23-3.31). Likewise, obesity also increased the risk of suicide ideation (OR, 1.3; 95% Cl, 1.11-1.56) although not suicide attempt. Furthermore, underweight individuals were more likely to report severe level of perceived stress (OR, 1.7; 95% Cl, 1.26-2.17) and life dissatisfaction (OR, 1.3; 95% Cl, 1.07-1.68). All of the results remained significant after adjusting for age, gender, education, and psychiatric illnesses. Conclusion This study found that being underweight is a significant risk factor for suicide and poor subjective wellbeing in Korea. It suggests that BMI status may be an important modifiable factor for improving mental health in Korea.
분산 빔포밍을 이용한 OFDM 시스템에서의 동기에러 영향 분석
김해수(Haesoo Kim),이광호(Kwangho Lee) 대한전자공학회 2014 전자공학회논문지 Vol.51 No.1
분산 빔포밍의 이득을 얻기 위해서는 심볼 타이밍, 위상, 그리고 주파수 동기가 적절하게 제어가 되어야 한다. 본 논문에서는 OFDM 시스템에서 분산 빔포밍을 이용할 경우 세 가지 동기의 에러에 의한 영향을 분석하였다. 협력신호 사이의 심볼 동기 에러는 저주파수의 부반송파(subcarrier)보다 고주파수의 부반송파에서 큰 영향을 미치고 있다. 위상 및 주파수 에러에 의한 전송신호의 손실은 부반송파 번호와 관련이 없으나, 주파수 오차는 전송신호의 손실 뿐만 아니라 부반송파 사이의 간섭을 야기하기 때문에 OFDM 시스템에서 중요하게 관리되어야 한다. 본 논문에서는 다양한 협력신호 개수 및 세 가지 동기 에러 값에 의한 성능 저하를 보이고 있으며, 성능 분석 결과는 시뮬레이션의 결과와 적절히 일치하는 것을 보이고 있다. Three synchronization issues, i.e., symbol time, phase, and frequency, have to be properly controlled to achieve distributed beamforming gain. In this paper, the impacts of synchronization errors in distributed beamforming are analyzed for OFDM systems. For symbol timing error of cooperating signals, high frequency subcarriers are more susceptible as compared to low frequency ones. The desired signal loss due to phase and frequency offset is independent of subcarrier number. However, frequency offset is critical in OFDM systems since it leads to interference from the other subcarriers as well as power loss in the desired signal. Performance degradation due to three synchronization errors is shown with various numbers of cooperating signals and offset values. It shows that the performance analysis is well matched with simulation results.
‘황도유학’의 구축과 대동아의 ‘제작’ -후지타 도코의 『홍도관기술의』 논의를 중심으로
강해수(Haesoo Kang) 역사비평사 2021 역사비평 Vol.- No.137
This study is part of a study to analyze the origin or genealogy of Japan’s ‘Hwangdo Confucianism’ that was ‘practical’ policy in Colonial Korea. Although Confucianism was a Confucian discourse in Japan in the Taishō and Early Shōwa eras that traversed imperial and colonial societies. It was implemented as a policy in Korea, where Confucianism was maintained as a central force in colonial society. Except in Japanese academic circles, there has been a unique theme in which the study was given only in the Korean academic community. This is because, above all, attention was focused on research related to the policy implementation of the Japanese Government-General of Korea targeting the forests of the central and local areas, focusing on researchers in the eld of Korean history. In the absence of related research in Japanese academic circles, there has been no interest in how the ‘Study in the Hwangdo’ was developing in the Japanese ideological circles at the same time. This paper intends to illuminate ‘Hwangdo Confucianism’, which has existed only as a research area in Korean academic circles, and its connection with the discourses of Confucianism and Confucianism in Japan in the Taishō and early Shōwa at that time. For this purpose, I would like to examine the discourse on ‘Hwangdo Confucianism’ in the Taishō and Early Shōwa Periods, particularly from a genealogical point of view with the 19th century Edo late Mito scholar Fujita Toko’s Kōdōkankijutsugi (1846).