• Physical Therapy Rehabilitation Science
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• 제7권3호
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• pp.102-108
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• 2018

Objective: To investigate whether the Minimal Clinically Important Difference (MCID) clinically defines improvement of Berg Balance Scale (BBS) scores in people with acute stroke in response to rehabilitation. Design: Retrospective study. Methods: Seventy-three participants with acute stroke participated in the study. Balance evaluation was performed using the BBS. All patients received rehabilitation with physical therapy for 4 weeks, 5 times a week, for 2 hours and 20 minutes a day. An anchor-based approach using the clinical global impression was used to determine the MCID of the BBS. The MCID was used to define the minimum change in the BBS total score (postintervention-preintervention) that was needed to perceive at least a 3-point improvement on the global rating of change. Receiver operating characteristic (ROC) curves was used to define the cut-off values of the optimal MCID of the BBS in order to discriminate between improvement and no improvement groups. Results: The optimal MCID cut-off point for the BBS change scores was 12.5 points for males with a sensitivity (Sn) of 0.62 and a specificity (Sp) of 0.89, and 12.5 points for females with a Sn of 0.69 and Sp of 0.85. The area under the curve of the ROC curve for all participants were 0.84 (95% confidence interval [CI], 0.72; 0.95, p<0.001), and 0.89 (95% CI, 0.77; 1.00, p<0.001), respectively. Conclusions: The MCID for improvement in balance as measured by the BBS was 13.5 points, indicating that the MCID does clinically detect changes in balance abilities in persons with stroke.

• Journal of Preventive Medicine and Public Health
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• 제34권3호
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• pp.262-268
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• 2001

Objectives : To integrate the results of studies which assess an association between blood lead and blood pressure. Methods : We surveyed the existing literature using a MEDLINE search with blood lead and blood pressure as key words, including reports published from January 1980 to December 2000. The criteria for quality evaluation were as follows: 1) the study subjects must have been workers exposed to lead, and 2) both blood pressure and blood lead must have been measured and presented with sufficient details so as to estimate or calculate the size of the association as a continuous variable. Among the 129 articles retrieved, 13 studies were selected for quantitative meta-analysis. Before the integration of each regression coefficient for the association between blood pressure and blood lead, a homogeneity test was conducted. Results : As the homogeneity of studies was rejected in a fixed effect model, we used the results in a random effect model. Our quantitative meta-analysis yielded weighted regression coefficients of blood lead associated with systolic blood pressure and diastolic blood pressure results of 0.0047 (95% confidence interval [CI]: -0.0061, 0.0155) and 0.0004 (95% CI: -0.0031, 0.0039), respectively. Conclusions : The published evidence suggested that there may be a weak positive association between blood lead and blood pressure, but the association is not significant.

• 수산해양기술연구
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• 제43권2호
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• pp.126-139
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• 2007

In the autumn of 2000 and spring of 2001, field surveys were conducted to estimate the effectiveness of artificial reefs (type cube, $2{\times}2{\times}2m^3$) that were established in the four islands of Bangnyeong, Socheong, Daeyeonpyeong and Ganghwa in Kyonggi Bay, the west coast of Korea during 1995 and 1996. The condition of reefs was examined through SCUBA diving and a side-scan sonar. Much of the reefs in Daeyeonpyeong and Ganghwa area were buried in bottom sediment. Despite an intensive search in Bangnyeong area, even a cluster of reefs was not found and most of them seemed to be buried by sand waves. Thus an appropriate investigation on the sediment transport should be included in pre-assessment for the expected performance and protection of artificial reefs. Distribution of average CPUE in natural fishing ground (control) was estimated by bootstrapping simulation and possible comparison of CPUE between control and reef areas (treatment) were made in Bangnyeong and Socheong (Experiment I). Positive reef effect was detected in Socheong but CPUE of treatment in Bangnyeong was varied between or lower than the 99% CPUE confidence intervals of the control. Control/treatment abundance and biomass of fishes and invertebrates were tested by paired t-test and sign test (Experiment II). Only four cases among 22 showed significant positive effect. Based on the results, the cube artificial reef in Socheong was inferred as an affirmative one. Floor type was hypothesized to be one of the probable agents in determining the effectiveness of artificial reefs.

• 한국결정성장학회지
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• 제23권4호
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• pp.173-179
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• 2013

다이아몬드는 원석의 형태가 불규칙하고 견고하더라도 보석으로 쉽게 가공될 수 있으며, 등급 평가에 영향력을 나타내는 테이블, 크라운, 퍼빌리언, 거들면을 정밀하게 측정하였다. Round Brilliant Cut Diamond의 표준 연마에 적합한 규격을 조사하였고, 통계적(95 %) 신뢰 구간으로 표준편차, 평균, 허용 오차를 검토하였다. 측정된 크기, 각도, 깊이, 두께의 변수들이 나타내는 분포에 따라, 커팅 등급의 빈도 분석과 프로포션을 비교하였다. 각 변수간의 상관관계와 프로포션에 나타난 영향력의 근거는 LSM(Least Square Method)을 적용한 회귀 분석으로 결정하였다. 본 논문에서, 다이아몬드의 테이블 크기와 퍼빌리언 깊이 퍼센트가 등급 결정에 많은 영향을 미치고, 특히, 퍼빌리언 깊이는 프로포션과 관련하는 주요 원인으로 광학 현상에도 작용함을 알 수 있었다.

• 정보교육학회논문지
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• 제6권1호
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• pp.42-52
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• 2002

효과적인 음악 감상 학습을 위해서는 음악 수업 시간의 감상뿐만 아니라 시간과 공간의 제약 없이 반복적인 음악 감상이 가능해야하며, 음악 감상 요소에 따른 다양한 멀티미디어 감상 학습 자료를 필요로 한다. 그러나 단위 시간에 개별화되고 반복적인 감상 학습이 어려울 뿐만 아니라 개별화된 감상 학습 자료도 부족한 실정이다. 이러한 문제를 해결하기 위해서 초등학교 음악 감상 학습에 필요한 학습 자료를 공유하고 음악 감상 학습 요소를 포함하는 초등학교 음악 감상 학습 시스템이 필요하다. 그러므로 본 논문에서는 초등학교 음악 감상 학습 요소를 분석하여 자기 주도적이고 능동적인 음악 감상학습이 가능하며, 또한, 온라인 상에서 학생이 올린 감상문을 교사가 평가함으로써 성취감과 자신감을 갖게 하여 즐거운 음악 활동을 경험할 수 있도록 초등학교 음악 감상 학습 시스템을 설계 및 개발하였다. 그리고 이를 초등학교에 적용해 보고 그 결과를 분석하였다.

• Journal of Oral Medicine and Pain
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• 제39권1호
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• pp.10-14
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• 2014

Purpose: The aim of this study is to evaluate the difference between gustatory functions in a sleep disordered breathing (SDB) group and a control group. The pathogenesis of SDB has not been fully understood. Though the precise contributions of neuromuscular and anatomical factors on SDB pathogenesis are still debated, we hypothesized that the gustatory dysfunction could be predisposed to SDB. Methods: All patients were diagnosed as SDB by polysomnography (PSG). On the basis of PSG results, patients were divided into 3 groups: snoring, mixed, and obstructive sleep apnea (OSA). The control group comprised healthy volunteers who were the same age as those of the SDB group and whose breathing was verified as normal using a portable sleep monitor device. The patient group and the control group were evaluated for gustatory functions with an electrogustometry (EGM). The electrical taste thresholds were measured in the anterior, midlateral, and posterior sides of the tongue and soft palatal regions, both sides. To find out the difference in EGM scores, statistical analysis was performed using the Kruskal-wallis and Mann-Whitney U test with 95% confidence interval and p<0.05 significance level. Results: The patients with SDB had higher EGM scores than the control group at all spots tested, except for the right midlateral of the tongue, and there was a statistical significance in the comparison between the control group and the divided SDB groups, respectively. Among the divided SDB groups, the snoring group had the most significant differences in the number of the measured spots, but there was no difference among the snoring, mixed, and OSA groups. Conclusions: These results may suggest that neurologic alterations with sleep disordered breathing could be associated with gustatory dysfunction. In the future, further systemic studies will be needed to confirm this study.

• 한국환경보건학회지
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• 제32권3호
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• pp.240-248
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• 2006

The purposes of this study were to investigate the symptoms, diseases and deaths of residents living near the municipal solid waste landfill site, and to compare the relative risk ratio of their adverse health effects with control group. In self-evaluation, the scores were especially severe lowest in residents of v2 and v3 villages(which were located about 500 m toward under the landfill site) such as 32.2 and 16.7 for village-environment, 24.8 and 16.0 for management of landfill site, and 23.5 and 16.5 for confidence of environmental policy, respectively. On symptoms, relative risk ratios were also highest as 3.53 and 3.55 for breathing difficulty, and 3.36 and 3.00 for respiratory symptom in v2 and v3 villages, respectively. On morbidity, they were slightly high as much as 1.39 and 1.24 in v5 and v2 villages, respectively. On mortality, relative risk ratios were $1.15{\sim}2.46$ in experimental villages. They were especially high as much as 2.46 in v3 village where located near under the landfill site, and also 2.14 in v5 village where located at area affected with the landfill site, but near the sea. The rate of cancer causing death was average 35.2% of total deaths. It was very highest as much as 61.1 % in v2 village, where was closely located near under the landfill site. Cancers causing death in this village were lung cancer(3 cases), larynx cancer(2 cases), stomach cancer(2 cases), pancreatic cancer(1 case), thryoid cancer(1 case), leukemia(1 case) and other(1 case). Our data, although based on limited number of cases and geographical coverage, suggest that residents living near landfill site have the increasing relative risks of various symptoms and mortality causing cancer. No causal mechanisms are available to explain these findings. But the possibility of a causal association between the increased adverse health effects and the municipal solid waste landfill site cannot be fully excluded.

• 보건교육건강증진학회지
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• 제21권1호
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• pp.153-170
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• 2004

Objectives： This study was performed to develop a smoking prevention program for Korean high school students, and to evaluate the effects of the program. Methods： A smoking prevention program, composed of five-session curriculum, was developed by modifying several smoking prevention and cessation programs based on the Social Influence Model. The program was applied to the freshmen of a technical high school. We surveyed with a questionnaire one week before education, one week after education, and two months after education. The number of participants for data analysis were 282(181 males, 101 females). Among those, 162(97 males, 65 females) students were allocated to the education group, and the other 120(84 males, 36 females) students were allocated to the control group. The effect of education was analyzed by multiple logistic regression analysis adjusted by potential confounders. Results： Among smokers, those who had education were more likely to quit smoking (OR＝2.99, 95% confidence interval(CI) 0.84-10.64), and to decrease smoking frequency(OR＝2.29, 95% CI 0.95-5.53) in borderline significance one week after education. However, the effect of education disappeared two months after education. The effect of education was significant(OR＝9.11, 95% CI 3.22-25.76) for the increase of smoking cessation intention one week after education, and it persisted until two months after education(OR＝2.94, 95% CI 1.18-7.35). Education was also a significant predictor(OR＝1.97, 95% CI 0.89-4.37) for the increase of smoking cessation stage one week after education and it persisted(OR＝6.39, 95% CI 2.42-16.86) after two months. Among non-smokers, those who had education were more likely to decrease smoking intention one week after education(OR＝4.71, 95% CI 1.63-13.58). However, the statistical significance of education disappeared two months after education. Conclusions： The results showed that the smoking prevention program developed in this study changed smoking behaviors immdeiately after education even though the effect did not persist. However, this program was successful in increasing smoking cessation intention and stage of smoking cessation among smokers.

• 보건교육건강증진학회지
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• 제21권1호
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• pp.171-182
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• 2004

Objectives： Smoking, especially among youth, has been increasing in Korea. This study was performed to evaluate the effects of a newly developing well-designed packaged smoking prevention program (PSPP) for middle school students and to propose further ideas about the program. Methods： The subjects were middle school students enrolled in one Busan city middle school. The effects of the PSPP were evaluated through intervention and follow-up. The PSPP was executed for 10 hours during the semester of middle school freshmen by the author as a position of health teacher, from 1999. After PSPP, cognitions and experiences about smoking were assessed annually from February, 2000 to 2002 by questionnaire. The responses of the educated group and the non-educated group (enrolled in the school at 1998) were compared through chi-square test and odds ratio (OR) and 95％ confidence interval (CI) using SPSS program (ver 10.0). Results： In the three years' follow-up study on the students enrolled in 1999, the proportion of habitual smoking increased significantly (p＜0.001); freshmen 0.2％, sophmore 1.7％, junior 5.0％. However, these level were lower than the results of national study； freshmen 1.1 ％, sophmorer 6.3％, junior 8.5％. Also, the risk of smoking based on the response of 'smoking is hazardous to my health' increased by higher grading. In the comparison of educated and non-educated group, the proportion of the habitual smoking was significantly lower in the educated group(5.0％) than in the non-educated group(13.5％) (OR [95％CI]＝0.33 [0.20∼0.57]). The response rate of 'smoking is hazardous to my health' was higher (OR [95％CI]＝4.42 [2.52∼7.77]), and that of 'maybe smoking in the future' was lower (OR [95％CI]＝0.43 [0.31∼0.59]) in the educated group than in the non-educated group. Conclusions： Though there is not enough information and it was a relatively short evaluation period, this PSPP is considered to be effective in smoking prevention in middle school students. Interests and continuity would be emphasized for the success of smoking prevention programs for younger subjects.

• 대한기계학회논문집B
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• 제24권11호
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• pp.1535-1539
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• 2000

A sonic nozzle is used as a reference flow meter in the area of gas flow rate measurement. The critical pressure ratio of sonic nozzle is an important factor in maintaining its operating condition. ISO9300 suggested the critical pressure ratio of sonic nozzle as a function of area ratio. In this study, 13 sonic nozzles were made by the design of ISC9300 with different half diffuser angles of 2。 to 8。 and throat diameters of 0.28 to 4.48 mm. The test results of half diffuser angles below 8。 ar quite similar to those of ISO9300. On the other hand, the critical pressure ratio for the nozzle of 8。 decreases by 5.5% in comparison with ISO9300. However, ISO9300 does not predict the critical pressure ratio at lower Reynolds numbers than 10(sup)5. Therefore, it is found that it is a better way for the flow of low Reynolds number to express the critical pressure ratio of sonic nozzle as a function of Reynolds number than area ratios. A correlation equation of critical pressure is introduced with uncertainty $\pm$3.2 % at 95% confidence level.