• 한국소음진동공학회:학술대회논문집
• /
• 한국소음진동공학회 2006년도 추계학술대회논문집
• /
• pp.34-40
• /
• 2006

The daytime(7 a.m to 10 p.m.) and the nighttime(10 p.m. to 7 a.m.) used to calculate existing $L_{dn}$ is different from the domestic daytime(6 a.m to 10 p.m.) and nighttime(10 p.m. to 6 a.m.) periods. The difference of a time periods makes too difficult for converting measured $L_{eq}$ during daytime($L_d$) and nighttime($L_n$) periods to $L_{dn}$. Thus, it is difficult to directly compare with $L_{dn}$ standard of a foreign country. The pupose of paper is to propose a proper experimental equations that make up for the problems. The data of this paper used road traffic noise data of Auto-Network System(ANS) that generates $L_{eq}$ TNI, $L_{NP}$ for 1 hour. A method of this paper is as follows.(1) The data of ANS converted 24 hour $L_{eq}$ which measured every 1 hour to existing $L_{dn}$ and to $L_{dn}$ of an experimental equations.(2) The existing Lan is compared to results of $L_{dn}$ from experimental equations. The paper proposes a three experimental equations. This paper select an approximate equation that was most similar, to existing $L_{dn}$ out of these equations. When $L_{eq}$ data of different daytime and nighttime periods are converted to $L_{dn}$, an experimental equation of this paper can be used and applied to $L_{dn}$'s calculation.

• 사상체질의학회지
• /
• 제32권1호
• /
• pp.39-49
• /
• 2020

The purpose of this study was to find out how sleep characteristics by Sasang constitution (SC) appear in Vietnamese immigrant women in Korea, and how sleep aberration by SC affected the quality of life. The number of 217 Vietnamese immigrant women joined this study. We surveyed SC with Korea Sasang Constitutional Diagnostic Questionnaire (KS-15) and sleep characteristics with Pittsburgh Sleep Quality Index(PSQI) questionnaire. We evaluated quality of life(QoL) with Euro Quality of Life-5Dimension(EQ 5D) questionnaire. A Chi-square test and a one-way ANOVA test were conducted according to SC, and T test also used to compare PSQI groups. Significant p was .05. The number(rate) of Taeeumin(TE), Soeumin(SE), and Soyangin(SY) were 40(18.4%), 55(25.3%), and 122(56.2%) respectively. The distribution of obstructive factors of sleep were significantly different according to SC(Too Cold in Sleeping, x =13.378, p=.037, Too Hot in Sleeping x²=12.834, p=.046). The distribution of daytime drowsiness(x²=15.379, p=.018) and falling concentration power (x²=17.533, p=.008) was significantly different according to SC. The sleep status of the subjects showed a significant negative correlation with the EQ 5D Visual Analogue Scale(VAS) (r =-.399, p<.001), and the EQ 5D Index (r=-.211, p=.002). In the EQ VAS, TE showed a difference between the good and bad sleeping groups (t=3.955, p<.001). SE showed a difference between the two groups in the EQ 5D Index (t=2.332, p=.037). SY did not show a difference between the two groups. This study reveals that sleeping is closely related with QoL and distribution of obstructive factors of sleep may be different according to SC. Further study to confirm the constitutional difference in race at Vietnam is needed.

• 한국환경보건학회지
• /
• 제34권5호
• /
• pp.395-402
• /
• 2008

Road traffic noise causes considerable disturbance and annoyance in exposed inhabitants. Particularly, arterial road noise is a significant environmental problem in many urban areas in which higher traffic volume and higher car speed occur. Arterial road noise became the target of this investigation in Seoul, South Korea. Noise levels were measured at four points that were based on distance from roadside at the same measurement site and under the conditions as reported by the National Institute of Environmental Research (NIER) in 1999. The average noise levels ($L_{eq,1h}$) of the arterial road was 80.3 dBA at 5 m, 77.4 dBA at 10 m, 73.7 dBA at 20 m, 70.9 dBA at 30 m. A comparison between 1999 and 2008's measurement values has shown that in 2008 noise level is up by about 1.5 dBA, traffic volume has increased by about 15.7%, while car speed has decrease by about 8%. The relationship between 2008' measured values and predicted values using the NIER Equation is low under 10 m from the roadside. The influence range of arterial noise is calculated at 26 m for road noise limits in daytime. In relation to the comparison between traffic volume and noise level, the equivalence in traffic volume (Light car+10xHeavy car) is higher than other variables.