• 한국항해항만학회지
• /
• 제39권1호
• /
• pp.77-82
• /
• 2015

슬래밍은 선체가 파도와 부딪히며 선수, 선미에서 강한 충격압력을 받아 급격한 진동이 발생되는 현상이다. 이러한 슬래밍은 사람에게는 승선감의 불쾌감을 주고, 선체에는 구조적인 위험을 주며 화물의 안전과도 깊은 관계가 있다. 따라서 선박 설계기준에는 슬래밍에 의한 충격압력을 충분히 고려한 구조설계를 해야 한다. 본 연구에서는 자유낙하 하는 쐐기형 구조물의 중량 및 낙하높이의 변화에 따른 슬래밍 충격 압력 및 유동장의 유동특성을 알아보고자 실험을 수행하였다. 유동장의 계측은 2-프레임 그레이레벨 상호상관 PIV기법을 이용해 접수와 이수로 구분하여 실험하였으며, 충격압력의 계측은 압력계측장비인 Dewetron System을 이용하였다. 실험에서 모델과 자유수면간 이루는 각도는 $15^{\circ}$를 적용하였으며 이때, 중량의 변화는 1.5, 1.8 및 2.0kg이고 자유낙하높이는 100, 200 및 300mm로 하여 실험하였다. 실험값을 통한 중량의 변화에 따른 충격압력은 중량의 증가하는 것에 비례하여 충격압력 또한 증가했으며, 이러한 경향은 자유낙하 높이가 높을수록 영향을 많이 받았다.

• 한국산학기술학회논문지
• /
• 제18권2호
• /
• pp.398-404
• /
• 2017

본 연구의 목적은 노인 여성의 약화된 천장관절 안정화를 위하여 비탄력 고정식 벨트를 적용하여 균형 능력과 낙상예방에 미치는 영향을 알아보고자 하였다. 노인 여성들은 출산과 폐경으로 천장관절의 약화 및 골반 주위근육들의 약화로 인하여 균형능력의 감소와 낙상위험률이 증가된다. 그러나 이와 관련된 연구는 불충분하다. 연구 대상자들은 실험군과 대조군으로 각각 20명씩 무작위로 배정하였으며, 비탄력 고정식 벨트를 실험군에게 적용한 후 균형 측정기를 사용하여 균형능력과 낙상 위험률을 평가하였다. 또한 비탄력 고정식 벨트를 적용한 실험군에서 하복부근육의 근두께를 초음파기기를 사용하여 실험 전후에 측정하였다. 통계방법은 연구대상자의 일반적 특성을 위하여 독립 t-검정, 균형 및 낙상지수를 위하여 $2{\times}2$ 반복 측정 분산분석 및 근두께를 위하여 짝비교 t-검정을 사용하였다. 두 그룹의 교호작용 효과는 안정성 지수(F1,38=47.24, p=0.001), 퓨리에 지수(F1,38=88.83, p=0.001), 체중분포 지수(F1,38=50.21, p=0.001) 및 낙상 지수(F1,38=21.59, p=0.001)에서 모두 통계적으로 유의하게 나타났다. 또한 비탄력 고정식 벨트를 적용한 결과 실험 후 복횡근(p=0.001)과 내복사근(p=0.001)의 근두께는 통계적으로 유의하게 증가하였다. 노인 여성들의 약화된 천장관절의 강화 및 안정화 방법으로 비탄력 고정식 벨트는 균형 및 낙상 예방에 긍정적이며 용이성, 보편성 및 경제적으로 효과적임을 알 수 있었다.

• 근관절건강학회지
• /
• 제11권1호
• /
• pp.61-73
• /
• 2004

Purpose: The purpose of this study was to determine the effects of a 8- week Tai Chi exercise program on improving the risk factors for falls in the older adults with chronic arthritis pain. Method: Fifteen subjects were assigned for experimental group and thirteen were assigned for control group. The subjects of the experimental group participated in a 8 -week program of Tai Chi exercise. In order to evaluate the effects of Tai Chi program, pain intensity, postural stability, balance, gait, and flexibility of knees and ankles were measured before the first and after the 8th session Result: After a 8-week Tai Chi program, there were significant improvement in single-leg stance time with eyes open(left: p=.000, right: p=.003), total scores of balance(p=.004), total scores of gait(p=.005), and the angle of ankle dorsiflexion(p=.008) in the experimental group when compared to the control group. However, there was no significant difference in pain intensity between Tai Chi group and control group(p=.054). Conclusion: These results suggest that a 8-week Tai Chi exercise program can be utilized as a safe and effective nursing program to improve on improving the risk factors for falls in the older adults with osteoarthritis.

• Animal cells and systems
• /
• 제7권2호
• /
• pp.169-171
• /
• 2003

Sodium, potassium, calcium, zinc and magnesium levels in the serum of 31 patients diagnosed as acute myocardial infarction were analyzed on admission (within 24 Hours) and after 48 hours. The results were compared with those of 26 age matched controls. No significant difference was observed in the mean sodium, potassium, calcium and zinc levels between the cases and controls. Compared to the controls, however, the variation in the level of magnesium is highly significant at the time of admission as well as after 48 hours. When the risk factors like diabetes mellitus, hypertension, smoking and alcohol were considered, it is found that there is no significant difference between the risk groups as well as between the patients. The alteration in magnesium level in acute myocardial infarction is independent of these risk factors. Within the first 24 hours, the significant decrease in serum magnesium (35-51％ fall when compared with the control group), correlates with its entry into the cell following ischemia. From this hypomagnesemic state, it rises to 9-22 times after 48 hours. This hyper-magnesemia after 45 hours is probably due to the shift of magnesuim from the intracellular fluid compartment to the extracellular fluid compartment that follows cellular recovery. Therefore, including magnesium in the immediate management of acute myocardial infarction will be beneficial in the early recovery.

• Safety and Health at Work
• /
• 제7권2호
• /
• pp.120-123
• /
• 2016

Background: To assess in a laboratory setting the ability to stay awake in a sample of workers of an Italian hospital and to investigate the association between that ability and the risk of occupational injury. Methods: Nine workers at the University Hospital of Udine who reported an occupational injury in the study period (cases), and seven noninjured workers (controls) underwent a polysomnography and four 40-minute maintenance of wakefulness tests (MWT). Differences in sleep characteristics and in wakefulness maintenance were assessed using Wilcoxon's rank sums tests and Fisher's exact tests. Results: Controls had greater sleep latency, lower total sleep time, fewer leg movements, and a higher percentage ratio of cycling alternating pattern, were more likely not to fall asleep during the MWT and were less likely to have two or more sleep onsets. Although not all the differences reached statistical significance, cases had lower sleep onset times in Trials 1-3. Conclusion: In the literature, the evidence of an association between MWT results and real life risk of accidents is weak. Our results suggest a relationship between the MWT results and the risk of injury among hospital workers.

• 융합정보논문지
• /
• 제11권8호
• /
• pp.176-184
• /
• 2021

본 연구는 65세 이상 노인 36명을 대상으로 커뮤니티 케어 사업에서의 주거환경수정이 낙상 위험환경과 대상자의 건강상태에 미치는 영향에 대해 알아보고자 하였다. 주거환경 및 대상자의 특성에 대한 평가를 위해 HOME FAST와 WHODAS-K 2.0을 사용하였으며, 집단 사전·사후 실험연구로 진행되었다. 평가를 바탕으로 주거환경수정 서비스를 시행한 결과, 낙상 위험수준은 통계적으로 유의하게 감소되는 변화를 나타내었으며(p<.01), 건강상태의 경우에는 이동성(p<.01)과 사회참여(p<.05)영역에서 통계적으로 유의하게 향상되어 전반적 건강상태(p<.05)의 변화에도 긍정적인 변화를 보이는 것으로 확인되었다. 향후 더 많은 연구 대상자 확보하고, 포괄적인 주거환경 평가를 활용한 연구가 필요하며, 주거환경수정의 질적 서비스 제공을 위해 대상자 우선순위 선별과정과 전문인력 인프라 확충이 요구된다.

• Journal of Trauma and Injury
• /
• 제37권1호
• /
• pp.67-73
• /
• 2024

Purpose: Posttraumatic stress disorder (PTSD) is prevalent and is associated with protracted recovery and worse outcomes after injury. This study compared PTSD prevalence using the PTSD Checklist for DSM-5 (PCL-5) with the prevalence of PTSD risk using the Injured Trauma Survivor Screen (ITSS). Methods: Adult trauma patients at a level I trauma center were screened with the PCL-5 (sample 1) at follow-up visits or using the ITSS as inpatients (sample 2). Results: Sample 1 (n=285) had significantly fewer patients with gunshot wounds than sample 2 (n=45) (8.1% vs. 22.2%, P=0.003), nonsignificantly fewer patients with a fall from a height (17.2% vs. 28.9%, P=0.06), and similar numbers of patients with motor vehicle collision (40.7% vs. 37.8%, P=0.07). Screening was performed at a mean of 154 days following injury for sample 1 versus 7.1 days in sample 2. The mean age of the patients in sample 1 was 45.4 years, and the mean age of those in sample 2 was 46.1 years. The two samples had similar proportions of female patients (38.2% vs. 40.0%, P=0.80). The positive screening rate was 18.9% in sample 1 and 40.0% in sample 2 (P=0.001). For specific mechanisms, the positive rates were as follows: motor vehicle collisions, 17.2% in sample 1 and 17.6% in sample 2 (P>0.999); fall from height, 12.2% in sample 1 and 30.8% in sample 2 (P=0.20); and gunshot wounds, 39.1% in sample 1 and 80.0% in sample 2 (P=0.06). Conclusions: The ITSS was obtained earlier than PCL-5 and may identify PTSD in more orthopedic trauma patients. Differences in the frequency of PTSD may also be related to the screening tool itself, or underlying patient risk factors, such as mechanism of injury, or mental or social health.

• 융합정보논문지
• /
• 제11권11호
• /
• pp.204-209
• /
• 2021

본 연구는 치매 노인의 치매 관련 요인 및 동반질환이 낙상 위험도에 미치는 영향을 파악하고자 실시한 자료분석 연구이다. 한국고용정보원에서 실시한 2018년 제7차 고령화연구패널조사를 이용하여 치매 노인 119명을 분석 대상으로 포함하였다. 치매 관련 요인은 치매 유병 기간 및 치매로 인한 일상생활 제한 여부에 대한 응답자료를 활용하였고, 동반질환은 고혈압, 당뇨, 비만 자료를 사용하였다. 수집된 자료의 통계분석은 SPSS statistics 22.0을 사용하여 로지스틱 회귀 분석을 실시하였다. 분석대상자의 치매관련 요인 및 동반질환 모두 낙상 위험도 증가에 유의한 영향을 미쳤으며, 특히 비만, 당뇨, 고혈압, 치매로 인한 일상생활 제한, 치매 유병 기간 순으로 영향력이 큰 것으로 도출되었다. 본 연구는 치매 노인의 낙상 위험을 높이는 요인을 확인함으로써 낙상 예방 프로그램의 구성에 우선되어야 할 요인을 제시하였다. 본 연구의 결과를 바탕으로 치매노인 케어에 치매유병기간과 일상생활 제한에 따른 낙상예방 전략과 동반질환으로 인한 낙상 고위험군의 집중 관리와 보행 보조도구 등 안전 보조도구 사용 훈련이 필요할 것이다.

• 보건교육건강증진학회지
• /
• 제24권4호
• /
• pp.23-39
• /
• 2007

Objective: The objective of this study is to identify the risk factors for falls among the Korean elderly population. Methods: We analyzed the data on 167 persons of 65 years of age or older who have experienced falls drawn from the Third Korea National Health and Nutrition Examination Survey. We conducted a cross-tabulation analysis and logistic regression analysis of the impact of the socio-demographic characteristics, health-related behavior, mobility, and morbidity upon the frequencies of falls. Results: Among the socio-demographic characteristics, gender(p<0.001), marital status(p<0.1), and the type of medical insurance(<0.1) were found to be statistically significant, Among the constraints on mobility, the severity of walking problems, (p<0.001) and depression(p<0.05) proved to be significant, As for variables related to health-related behavior, the level of routine physical activities (p<0.001) was found significant, Finally, rheumatism(p<0.1), osteoporosis(p<0.05), diabetes(p<0.1), urinary incontinence(p<0.01) were also significant. A logistic regression analysis of the incidence of falls revealed that urinary incontinence was the most important risk factor with an odds ratio of 2.7. Conclusion: Although a variety of factors affect the frequencies of falls in the elderly population, urinary incontinence proved to be the single most important risk factor. This finding implies that education for fall prevention is crucial for those with urinary incontinence.

• Physical Therapy Rehabilitation Science
• /
• 제11권1호
• /
• pp.66-77
• /
• 2022

Objective: This study is a systematic review conducted to analyze the environmental factors that cause falls in the older adult. Design: Systematic review Methods: The study was conducted by searching the Research Information Sharing Service (RISS), Korean studies Information Service System (KISS), and Data Base Periodical Information Academic (DBpia) databases for literature published in South Korea up to July 2020. A total of 12 studies were selected for analysis based on the inclusion and exclusion criteria. Results: The results of the analysis revealed that all the selected literature were surveys and the study subjects were 65 years of age and above. The sample size ranged from a minimum of 95 subjects to a maximum of 3,278. A total of eight tools were used to measure the environmental factors associated with falls. The prevalence and recurrence of falls increase with age and deterioration of health. Older adult individuals who experience falls encounter difficulties in recovering from impaired physical function and disability; moreover, in severe cases, falls may lead to death. Falls are largely associated with a combination of intrinsic and extrinsic (i.e., environmental) factors. The purpose of this study was to assess potential extrinsic risk factors for falls. Falls occur in indoor environments, such as washrooms, bathrooms and living rooms, and outdoor environments, including roads and stairways, depending on the season, time of day, and use of ambulatory aids. In such environments, falls are mainly caused by slipping and stuttering. Conclusions: Therefore, as the rate of fall is influenced by several factors, extrinsic factors should be improved by developing comprehensive accident prevention programs that address the improvement of environmental risk factors around places of residence to reduce risk factors among the older adult, who, especially, are at a high risk for falls.