• Journal of Environmental Policy
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• v.7 no.1
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• pp.1-29
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• 2008

The Ministry of Environment(MoE) of Korea has recently established the Environmental Health Act. This Act contains a clause related to implementation of Health Impact Assessment(HIA). So, selecting a landfill which was expected to have an influence on human health among major development projects, this study carried out the human risk assessment due to inhalation exposure to landfill gas emission and attempted to measure the possibility of domestic application of HIA in the future. The process for HIA on landfill site extension focusing on human risk assessment is as follows: The first step is to presume and calculate the amount of landfill gas emissions using LandGEM, The second step is to carry out exposure assessment using K-SCREEN Model which is used for predicting the concentration in a conservative method. The last step is to carry out human risk assessment of carcinogenic and non-carcinogenic substances. It is considered that it is likely to apply a technique for human risk assessment due to inhalation exposure to landfill gas emission performed here more specifically in the case of implementing HIA. In addition, it is also believed that more systematic studies are needed to overcome some weak points and limits found in this study and if these weak points and limits are improved more reliable outcomes will be produced.

• Journal of Convergence for Information Technology
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• v.10 no.5
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• pp.224-231
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• 2020

The purpose of this study was to analyze the change in phytoncide intake in mood state and health-related quality of life menopausal women through an 8-week experiment. For the study, 41 subjects under 2 years after menopause in D and N districts in Seoul were targeted. consisting of three study points: pre-measurement (0week), intermediate (4week), and post-measurement (8week). Was used As a dependent variable of this study, mood status and health-related quality of life were set, and data were collected through three questionnaires: pre-measurement, intermediate measurement, and post-measurement. As for the analysis method, one-way ANOVA and post verification were performed. Derived result First, the phytoncide inhalation group of postmenopausal women showed statistically significant effects of reducing tension, depression, fatigue, chaos, and increasing vitality among the sub-factors of mood status compared to the control group. Second, the phytoncide inhalation group of postmenopausal women showed statistically significant increase in competence, mental well-being, stability, and vitality among the sub-factors of health-related quality of life compared to the control group.

• Journal of Chest Surgery
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• v.37 no.1
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• pp.50-55
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• 2004

Background: Transcranial Doppler ultrasonography (TCD) can detect microembolic signals (MES) in the patients with a potential embolic source. Clinical significance of MES has not been demonstrated in patients with prosthetic mechanical heart valves. We studied the correlation between cerebral thromboemoblic events after the mechanical heart valve surgery (MHVS) and residual MES during TCD monitoring with 100% oxygen inhalation in patients with mechanical heart valves. Material and Method: Twenty patients with previous cerebral thromboemoblic events after MHVS and a sex- and age-matched control group (n=30) were studied. TCD monitoring was performed from unilateral middle cerebral artery. After baseline monitoring for 20 minutes, 61 of oxygen was inspired for 40 minutes. Result: The site of valve and the duration after MHVS of the patients did not differ from those of controls. During baseline monitoring, there was no significant difference in MES prevalence or counts compared to controls. During oxygen inhalation, patients showed a higher MES prevalence (55%, 27.6%, p=0.045) and a more frequent MES counts (p=0.027) compared to controls. Conclusion: TCD monitoring with oxygen inhalation may be useful to differentiate clinically significant MES in patients with mechanical heart valve.

• Journal of the Computational Structural Engineering Institute of Korea
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• v.31 no.2
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• pp.79-85
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• 2018

A two-way pump can reduce costs by draining and circulating water out and into the drum of the washing machine using a single motor whereas a conventional one-way pump uses two motors for doing the same function. However, when the water is drained through the drainage outlet in the two-way pump casing, a backward or inhalation flow occurs and the water flows to the circulation outlet. Likewise, when the water is circulated, the backward flow or inhalation makes the water flow to the drainage outlet. In this study, design optimization of the two-way pump casing is performed to maximize its performance while improving backward flow and inhalation occurring inside of the pump casing. For this, design variables of the pump casing that mainly affect the performance of the pump such as flow rate and torque of the motor were selected through the analysis of mean. Using response surface models for the performances, the ratio of the flow rate to the torque was maximized with satisfying the constraints for the back flow and inhalation through design optimization.

• Journal of Korean Academy of Nursing
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• v.44 no.2
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• pp.189-197
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• 2014

Purpose: This study was conducted to develop an asthma management education program for preschool children using Roy's adaptation theory as a framework and examining the effects of this program on adaptation to asthma treatment. Methods: A non-equivalent control group pre-post-test design was used with 43 preschool children diagnosed with asthma and required to be hospitalized for inhalation therapy. An intervention group (n=23) participated in the educational program and a control group (n=20) received regular treatment. The education program was conducted and evaluated from June 30 to October 31 2012, a maximum 3 times every 24 hours during hospitalization. Two nurses conducted the program using the teaching method of Gagn$\acute{e}$ and Briggs; instruction design theory through questionnaires to measure perception of disease, behavior of adaptation to treatment with inhalation therapy. Results: Effects of asthma management education program; scores for face-pain rating decreased and time of adaptation to treatment increased significantly in the experimental group compared to the control group but no significant differences were found for perception of the disease's cause and treatment. Conclusion: Results indicate that the asthma management education program has positive effects on adaptation to asthma treatment of preschoolers.

• Journal of the Society of Naval Architects of Korea
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• v.45 no.1
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• pp.101-107
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• 2008

According to the existing research result on the seabed organic sediment, pollutants from the land and the sea contaminate the coastal water and sediment on the seabed. To tackle this problem, we need to dredge organic sediment. In the present paper, the development of removing system of seabed sediment by the difference of water head is researched by experimental method. For the validation of the decompression system, computations for validation are carried out for sediment removing equipment. The performance of inhalation equipment is analysed by some model tests.

• Journal of Society of Preventive Korean Medicine
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• v.25 no.2
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• pp.45-60
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• 2021

Objective : This study was aimed to review randomized controlled trials (RCTs) about whether aromatherapy relieves stress. Method : We searched document about criteria to use words like 'Aroma', 'Oil' and 'Stress'. The study included 24 RCTs which were selected by total 167 studies searched in Korean Journal by searching OASIS, ScienceON, KISS, RISS. Cases that cannot be performed alone are excluded. Results : We got 24 domestic standard documents. Of the 24 studies, 14 were for students, and 6 were for patients receiving hospital treatment. Among the 7 treatments, dry-inhalation was used 13 times, and necklace-inhalation was used 9 times. Of the 24 Studies, lavender oil was used 19 times and sweet orange was used 4 times. Among the 28 types of measuring instruments used, 10 related to the autonomic nervous system and 8 STAIs and VASs were used respectively. Conclusion : It was possible to conclude that aromatherapy was effective in relieving stress. Through further research, it is necessary to study effective oil mixing methods, methods for measuring subjective stress, multimodal intervention, and effective intervention periods.

• Tuberculosis and Respiratory Diseases
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• v.41 no.3
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• pp.270-276
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• 1994

Background: The measurement of nonspecific bronchial hyperreactivity is valuable for diagnosis and management of bronchial asthma. Methacholine or histamine is used for the pharmacologic provocation test. Usually a methacholine bronchial provocation test is performed by a dosing technique with counted number of breaths. A dosimeter is indispensable in the dosing technique. Recently a timed tidal breathing technique which dose not need an expensive dosimeter was introduced. We measured the degree of nonspecific bronchial hyperreactivity to histamine using a simple timed tidal breathing technique. Method: Forty two healthy volunteers, 12 patients with bronchial asthma(BA), 10 patients with rhinitis(RH) and 10 patients with upper respiratory infection(URI) participated in the study. The subject's nose was clipped and inhalation continued during tidal breathing for 2 minutes via a face mask. $FEV_1$ was measured at 30 seconds, 90 seconds after inhalation and inhalation of next solution was continued until there was a fall in $FEV_1$ of 20%. Histamine PC20 was defined as the concentration at 20% fall of $FEV_1$ and it was obtained from the log dose-response curve by linear interpolation. Results: Inhalation of serial dilution of histamine could be performed in all patients without significant side effects. The geometric mean${\pm}$standard deviation of histamine PC20 in healthy volunteers is $8.27{\pm}2.22mg/ml$, BA group $0.33{\pm}3.02mg/ml$, RH group $0.85{\pm}3.24mg/ml$, and URI group $1.47{\pm}1.98mg/ml$. Conclusion: Histamine bronchial provocation test using timed tidal breath method is a simple and suitable tool for management of patients with bronchial hyperreactivity.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.15 no.12
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• pp.7214-7223
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• 2014

Purpose: This study examined the effects of aroma inhalation method with roll-on on life stress, salivary cortisol and fatigue in nursing student preparing national examination for nursing licensure. Methods: The study was a nonequivalent control group pre-post test design. The participants were 46 nursing students of which 21 were assigned to the experimental group and 25 to the control group. Data was collected from October 10 to November 21, 2011 and analyzed using the SPSS Win 18.0 version program. The intervention was conducted 3 times a day for 6 weeks. Results: Significant differences in reported life stress experience frequency and fatigue between the two groups. On the other hand, the issue of salivary cortisol and life stress importance rate was not significant. Conclusion: Aroma inhalation method with roll-on can be used as an effective intervention to decrease life stress experience frequency and fatigue of nursing students with national examination for nursing licensure.

• Journal of Dental Anesthesia and Pain Medicine
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• v.21 no.4
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• pp.321-327
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• 2021

Sevoflurane is familiar to anesthesiologists as an inhaled anesthetic to induce and maintain anesthesia; however, it has not been widely used for sedation. Recently, the use of sevoflurane for inhalational sedation has been increasing. Moreover, in Korea, the use of sevoflurane for conscious or deep sedation in dental care for children and the disabled is increasing, primarily by dental anesthesiologists. In this article, we reviewed a sedation method using sevoflurane.