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정상 고막과 기도골도차를 가지는 비외상성 난청의 임상양상과 측두골 Computed Tomography 분석
전승연,안용휘,윤라경,심현준 대한이비인후과학회 2023 대한이비인후과학회지 두경부외과학 Vol.66 No.11
Background and Objectives This study aimed to investigate the causes, clinical manifes-tations, temporal bone CT findings, and audiologic results of outpatients with non-traumatichearing loss with air-bone gaps and intact tympanic membranes. Subjects and Method The medical records from 2014 to 2022 of 66 patients (77 ears) withnormal tympanic membranes but who had the air-bone gap of more than 20 dB over two con-secutive frequencies were reviewed. Results The mean age of the patients was 46.8±17.0 years old. The mean air-bone gap was24.8±10.3 dB. Of the 77 ears (66 patients) studied, 10 ears were surgically diagnosed with oto-sclerosis (6 ears), ossicular discontinuity (2 ears), superior semicircular canal dehiscence (1 ear),and unknown etiology (1 ear). Additionally, 29 more ears (28 patients) were clinically diagnosedwith silent otitis media (7 ears), otosclerosis (5 ears), thickened tympanic membrane (5 eras),E-tube dysfunction (4 ears), ossicular anomaly (4 ears), semicircular canal dysplasia (2 ears),and endolymphatic hydrops (2 ears). Temporal bone CT images showed normal findings in 33ears (54.1%) and abnormal findings in 28 ears (45.9%). Patients with abnormal CT findingshad a poorer speech discrimination score than those with normal findings ( p<0.05). The air-bone gap was significantly decreased postoperatively from 30.5±12.7 dB to 6.4±4.0 dB, witha tendency to decrease greater at a low frequency than at a high frequency. Conclusion Among patients with air-bone gap and intact tympanic membrane, otosclerosiswas the most commonly confirmed diagnosis through surgery, while silent otitis media wasthe most frequently observed diagnosis based on clinical evaluations.
장기요양시설 거주노인의 치매 여부에 따른 신체활동수준과 관련 요인: 개인 및 기관 특성의 영향
전승연,김홍수 한국보건행정학회 2018 보건행정학회지 Vol.28 No.4
Background: Physical activity (PA) is critical for maintaining the health and well-being of older people in community and also institutional settings. The purpose of this study was to examine the current status of PA and related individual and organizational factors among older nursing home residents with and without dementia. Methods: This is a secondary data analysis study of a nationwide survey of 92 long-term care facilities in Korea, and the study sample includes older residents with dementia (n=753) and without dementia (n=480). The level of PA was measured by PA time and whether or not residents had an outdoor activity over the past 3 days. Multi-variate, multi-level analyses were conducted. Results: More than half of the sample in both groups had no or less than 1 hour of PA. About one out of four older people in our sample had no outdoor activity over the past 3 days regardless of whether or not they had dementia. Among the people without dementia, several individual-level factors were associated with PA, including dependency for activities of daily living, social activity participation, and caregivers’ belief in the functional improvement of residents. Unlike the non-dementia group, individual- and organizationallevel factors including staffing level and having the relevant equipment for PA were associated with PA among those with dementia. Conclusion: Study findings provide evidence on the lack of PA among older nursing home residents, and the importance of institutional capacity with regard to human resources and physical equipment for promoting PA among people with dementia, in particular. Policies and supports are needed to promote the implementation of healthy aging programs including PA for older nursing home residents. Such programs should be person-centered with consideration to the physical and cognitive status of individual residents.
플래시 메모리 파일 시스템의 지움정책 개선에 관한 연구
전승진(SeungJin Jeon),공기석(Ki-Sok Kong),황달연(DalYeon Hwang) 한국정보과학회 2003 한국정보과학회 학술발표논문집 Vol.30 No.2Ⅰ
최근 들어 임베디드 시스템이 많은 발전을 하고 있고, 공간적인 장점으로 인해서 임베디드 시스템에 플래시 메모리가 많이 사용되고 있다. 그러나 플래시 메모리는 일반 자기 저장 매체와는 다른 특성을 가지고 있어서 플래시 메모리에 알맞은 효율적인 파일 관리 시스템을 필요로 한다. 현재 임베디드 리눅스에서는 JFFS2파일 시스템을 많이 사용하고 있는데, 이 논문에서는 JFFS2의 wear-leveling 알고리즘을 개선한 빈도수를 이용한 지움정책을 제안하고, 시뮬레이션을 통해서 빈도수를 이용한 지움정책의 wear-leveling이 효과적인 성능을 나타냄을 보였다.