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Characteristics of Abdominal Obesity in Persons With Spinal Cord Injury
김광동,남형석,신형익 대한재활의학회 2013 Annals of Rehabilitation Medicine Vol.37 No.3
Objective To investigate the characteristics of community-dwelling spinal cord injury (SCI) persons with obesity, including diet, socioeconomic factors, weight reduction method, and frequency of body weight and abdominal circumference measurements.Methods We developed a questionnaire based on ‘the Fourth Korea National Health and Nutrition Examination Survey, 2009’. A total of 371 community-dwelling SCI persons were enrolled in this study. Inclusion criteria were SCI persons older than 20 years with more than 1 year elapsed since the injury. Trained investigators visited SCI persons’ home to complete the questionnaire and measure abdominal obesity (AO) as defined by the waist circumference.Results Prevalence of AO was 29.2% in SCI persons and 27.4% in the general population (GP), showing no significant difference. Education showed correlation with AO in both SCI persons and the GP. The injury level, type of injury and income did not show any correlation with AO in SCI persons. Only 28.8% and 48.8% of SCI persons measured their waist circumference and body weight within the past year, respectively. Also, SCI persons with AO thought that their body was less obese compared to persons with AO in the GP (p<0.001). The method of weight reduction was diet modification in 53.6% of SCI persons with AO, which was higher than 37.1% of persons with AO in the GP.Conclusion In SCI persons, obesity perception as well as socioeconomic factors correlated with AO, but these were not relevant factors in the GP. Therefore, development of a specific and intensive weight control program for SCI persons is necessary.
우주전파 수신기를 위한 IF 분배기 및 V/F 컨버터 설계
김광동,임인성,변도영,송민규,Kim, Kwang-Dong,Yim, In-Sung,Byun, Do-Young,Song, Min-Gyu 한국천문학회 2007 天文學論叢 Vol.22 No.3
We designed the Intermediate Frequency(IF) distributor for multi beam backend system and manufactured Voltage to Frequency Converter(VFC) to measure the multi-beam receiver performance. Multi beam receiver has 15 channel receivers and can get 15 spectrums at once. The multi beam receiver has more observation efficiency than single beam receiver. We manufactured the 15 IF distributors to distribute IF signal for Autocorrelation spectrometer that is radio signal processor. Also, we manufactured the VF Converter to test the performance measurement of receiver for Korea VLBI Network(KVN) system which is under-construct in Seoul, Ulsan and Jeju. As a result of performance measurement, we could obtain linearity of 99.4% on the input power vs output frequency and measured the operating range of input frequency.