• 한국치위생학회지
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• 제10권4호
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• pp.577-584
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• 2010

Objectives : The purpose of this study was to examine the relationship of toothpaste-squeezing methods to the amount of toothpaste used among adults. Methods : The subjects in this study were 227 freshmen in a local college. After the intent of a survey was explained by this researcher, how much dentifrice they used was checked to ensure statistical objectivity, and then a survey was conducted. The collected data were analyzed with a SPSS WIN 13.0 program. Results : The findings of the study were as follows:1. As for connections between the way of squeezing and the amount used, the usual amount used, the amount used by horizontal squeezing and the amount used by pea-sized squeezing were respectively 1.12g, 0.66g and 0.46g. The amount used by horizontal squeezing and pea-sized squeezing was less than the usual amount used by 0.46g(41%) and 0.66g(59%) respectively.2. Gender, residential area, educational experiences and daily mean toothbrushing frequency made no differences to the amount of toothpaste used.3. The students who normally used a larger amount of toothpaste used a greater amount of toothpaste as well when they utilized horizontal squeezing and pea-sized squeezing, and the larger amount used by horizontal squeezing led to the greater amount used by pea-sized squeezing. Conclusions : As there were large disparities in the amount of toothpaste used according to the squeezing methods, systematic research efforts should be directed into setting the standard for the recommended amount of toothpaste used for adults and into squeezing method so that they could brush their teeth in an effective manner by using the minimum amount of toothpaste.

• 한국학교보건학회지
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• 제22권1호
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• pp.67-72
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• 2009

Purpose: The purpose of this study was to examine the relationship between the toothpaste squeezing methods and the amount of toothpaste that the daycare teachers apply for the children in order to prevent the overuse of fluoride-containing toothpaste among children, and to understand their educational experiences on oral health and their awareness of the right amount of toothpaste used. Methods: The subjects in this study were 87 teachers at 16 different daycare centers in the city of Sokcho, Gangwon Province. They were interviewed to find out whether they had ever received oral health education and whether they were cognizant of the right amount of toothpaste to be used. And a transverse technique and a pea-sized squeezing technique were selected to look for connections between their toothpaste squeezing methods and the amount of toothpaste used by them. Results: 89.7 percent of the daycare teachers investigated taught to preschoolers how to do toothbrushing after they took meals and had a snack. 36.8 percent of the daycare teachers had children squeeze toothpaste on their own. The amount of toothpaste applied by the daycare teachers at a time was 0.58ｇ. When they utilized two other squeezing methods, transverse technique and pea-sized squeezing technique, they used each 0.38 g (p<0.005) and 0.38 g (p=0.405) of toothpaste. Conclusion: To prevent children from being overly exposed to fluoride-containing toothpaste, daycare teachers should learn about the right amount of toothpaste to be used when oral health education is provided, and the transverse technique should be recommended to ensure the use of the proper amount of toothpaste.

• 한국태양에너지학회 논문집
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• 제26권3호
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• pp.89-97
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• 2006

Our Housing culture continuously changes for the correspondence to social development and changes of economy, and be developing. A massive apartment complex continuously increased, and According to this in our country heating energy consumption of a residential building is continuously increasing at country me whom was limited in order to raise efficient residential land use and diffusion ratio of house. If confirm an element to be able to reduce use of a heating energy, and there is saving possibility to parts of energy saving, this study will present the standard amount used with bases to the gas amount used for heating and Field Test data about room temperature. Execute simulation with building balance (public area, a plain), the gas amount useds such as incense of a building, indoor setting temperature ($^{\circ}C$), a position of an apartment house etc. to affect the energy amount used of a valuation object building of a variable through Field Test and research on the actual condition. Calculate the standard amount used of city gas for winter season heating of a comparative analysis apartment house to data value getting the above results through Field Test and simulations with bases.

• Toxicological Research
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• 제35권4호
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• pp.389-394
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• 2019

When conducting risk assessments of cosmetic ingredients, it is important that reliable exposure information is obtained for cosmetic products. As cosmetics are becoming more diverse, continuous effort must be made to obtain exposure data that reflect their growth and usage trends. The usage pattern of cosmetics, such as the application area and amount used, may differ by product type and also by country. We conducted a survey to compare the amount of sun spray and sun cream used in a usage environment in South Korea. The study was conducted on Haeundae Beach, one of the most popular beaches in South Korea. A total of 1,255 beachgoers participated in this study; 604 and 651 participants used the sun spray and sun cream, respectively, while sunbathing and enjoying water activities on the beach for one day. Exposure was analyzed following a probabilistic method. On comparing all subjects, it was found that the group that used sun spray (mean: 44.52 g/day) used significantly more product (p = 0.000) than those who used sun cream (mean: 20.51 g/day). By analyzing the daily exposure of sun spray and sun cream per unit body weight according to age and gender, the exposure amount of sun spray and sun cream was found to be highest among 2~9 year-old girls (mean for sun spray: 2.51 g/kg/day, p95: 5.50 g/kg/day, mean for sun cream: 0.79 g/kg/day, p95: 1.79 g/kg/day). The amount of sun spray used is approximately twice that of sun cream. Among both the sun spray and sun cream groups, the exposure amount per unit body weight was highest in girls younger than 10. These factors should be considered when conducting risk assessments of sun spray and sun cream.

• Journal of Acupuncture Research
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• 제29권6호
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• pp.1-10
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• 2012

Objectives : The aim of this review was to summarize and assess researches reporting thermal properties of moxibustion. Methods and Materials : We searched one electronic database(PubMed) and two journals(The Journal of Korean Medicine and The Journal of Korean Acupuncture & Moxibustion Society) and for the articles published until Nov. 2012. The articles reporting thermal characteristic of moxibustion were selected and reviewed. 31 articles were included and assessed in this review. The type of moxibustion, the material beneath moxbustion, main outcome and the amount of information were reviewed. The amount of information was defined as 1 for one main outcome reported in each article. Results : Direct moxibustion were used in 15 articles and indirect moxibustion were used in 19 articles. 11 researches used anti-heating plate for the material beneath moxibustion, one article used steel ring, agar with anti-heating plate, six articles used skin and another six articles used heater. Two articles used animals and another two articles used metals. The mean value of the amount of information was $4.41{\pm}2.94$(SD). Conclusions : Research articles assessing properties of moxibustion have been consistently published since 1993, and employed various methodologies. The amount of information has been associated with four section analysis and is currently decreasing. Research assessing properties of moxibustion with clinical effectiveness is needed.

• 대한방사선기술학회지:방사선기술과학
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• 제30권2호
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• pp.167-175
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• 2007

2001년부터 본격적으로 보급되기 시작한 PACS 도입은 영상의학과에서는 필름비용 절감, 인건비 절감, 현상액 사용량 절감, 관리업무 축소, 재 촬영 건수의 감소 등의 효과를 볼 수 있었고, 임상 의사들에게는 의료영상동시 활용, 임상정보의 증대, 진료 환자수의 증가, 의료영상 및 판독결과 활용성 증대 효과를 기대할 수 있는 것으로 알려져 있다. 환자들에게는 방사선 피폭선량 감소, 진료비 절감, 임상정보를 신속하게 알 수 있는 효과가 있다. 이에 본 저자들은 Full PACS를 도입한 서울 및 경기도의 10개 종합병원을 대상으로 하여 PACS로 인한 긍정적인 여러가지 효과 중 현상, 정착 폐수의 감소 추이를 알아보기 위하여 도입 1년 전과 도입 3년 후를 비교 분석하여 다음과 같은 결론을 얻었다. 1. 1개월 당 검사 건수는 7357.7건이 증가하였으나 필름 사용량은 90%가 감소하였다. 2. 현상액 월 평균 소모량은 3년 후 92%가 감소하였고, 정착액은 86%가 감소하였다. 3. 필름 1장 당월 평균 현상액 소모량은 3년 후 149%가 증가하였고, 정착액은 300%가 증가하였다. 4. 현상 폐수 발생량은 3년 후 월 평균 88%가 감소하였고, 정착 폐수는 87%가 감소하였다. 5. 3년 후 필름 1장 당월 평균 현상폐수 발생량은 377%, 정착폐수 발생량은 385%가 증가하였다.

• 치위생과학회지
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• 제10권6호
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• pp.439-443
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• 2010

본 연구는 과량의 불소세치제 사용을 예방하기 위하여 만3~6세 아동의 불소세치제 사용량을 비교 평가하고자 충남 홍성군에 위치한 어린이집 5곳의 84명을 대상으로 칫솔두부크기와 세치제 짜는 방법에 따른 세치제량을 비교하였고, 실제적으로 어린이를 대상으로 구강보건교육을 시행하고 있는 구강보건교육자인 치위생과 학생 141명을 대상으로 콩알크기(pea-size)로 짜는 방법과, 소량의 세치제를 묻히는(smear) 방법으로 짠 세치제 양을 비교하여 다음과 같은 결과를 얻었다. 1. 어린이용 칫솔에 짠 불소세치제의 양은 0.29 g이었고, 성인용 칫솔에 짠 불소세치제의 양 은 0.34 g으로 유의한 차이가 나타나 작은 크기의 칫솔로 짰을 때 더 적은양의 세치제를 사용하는 것으로 조사되었다(p<0.05). 2. 3-6세 아동이 평소 통상적으로 짜는 방법대로 짠 양이 0.31 g이었고, 콩알크기(pea-size)로 짠 양이 0.21 g이었으며, 소량의 세치제를 묻히는(smear) 방법을 이용하여 짠 양은 0.26 g으로 조사되어, 평소 통상적으로 짜는 방법보다 콩알크기(pea-size)로 짜는 방법이나 소량의 세치제를 묻히는(smear) 방법을 이용하면 더 적은양의 불소세치제를 사용할 수 있는 것으로 조사되었다(p<0.05). 3. 치위생과 학생들을 조사한 결과 콩알크기(pea-size)로 짰을 때의 양은 0.23 g이었고, smear 방법을 이용했을 때는 0.15 g으로 조사되어, 소량의 세치제를 묻히는(smear) 방법을 이용했을 때 더 적은 양의 불소세치제를 사용하는 것으로 조사되었다(p<0.05). 4. 아동과 치위생과 학생들의 세치제 짜는 방법에 따라 차이가 있는지 조사한 결과 콩알크기(pea-size)로 짰을 때는 두 집단 간의 차이가 없었으나(p>0.05), 소량의 세치제를 묻히는(smear)방법으로 짰을 때는 치위생과 학생들이 더 적은양의 불소세치제를 사용하는 것으로 조사되었다(p<0.05) 5. 두부가 작은 칫솔을 사용하면 불소세치제 사용량을 감소시킬 수 있으며, 콩알크기(pea-size)로 짜는 방법과 소량의 세치제를 묻히는(smear) 방법은 불소세치제 사용량의 감소로 부주의한 불소 섭취를 최소화할 수 있어 어린이에게 추천할 수 있다.

• 대한건축학회논문집:구조계
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• 제35권2호
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• pp.21-28
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• 2019

Handmade hydrated lime has been used for preservation and repair of architectural heritage in Korea. However, the effect of the amount of water used for slaking quicklime on the physical and chemical properties of the hydrated lime, which is the result of the slaking process, has not been clearly understood. In this study, particle size distribution, chemical composition and crystalline phases of the hydrated lime are investigated by varying the amount of water used for the slaking. In addition, temperature history during the slaking process is examined. For this, various experiments, such as laser diffraction analysis, X-ray fluorescence, X-ray diffraction, thermogravimetric analysis, and temperature recording using a thermocouple, were performed. When the quicklime came into contact with water, its temperature reached $100^{\circ}C$ within 10 min due to sudden exothermic reaction of calcium oxide, and this temperature was maintained for about 30 min. The water to lime ratio influenced the cooling rate during the slaking process; that is, the more water was used, the longer it took to reach an ambient temperature. The amount of water for the slaking did not have a noticeable effect on the contents of major components of the hydrated lime such as calcium hydroxide and calcium carbonate, but when slaked with more amount of water, average particle size of the lime tended to decrease. The experimental results in this study can be used as references for developing guidelines on the safety or appropriate amount of water in the lime slaking process.

• 설비공학논문집
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• 제25권11호
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• pp.578-584
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• 2013

Vertical open display cases are widely used in shopping malls, supermarkets, or retail stores to sell frozen and refrigerated products. Open display cases use air curtains to maintain a reasonable temperature within the storage space, prevent insects from breaking in, and reduce energy usage. In this research, computational fluid dynamics was used to find the optimal condition for reducing energy by considering various conditions such as discharge speed or temperature of air curtains. Results of the study showed that the amount of energy consumed in the display cabinet is influenced by the discharge speed and temperature of the slots installed on the upper area and the amount of air supplied to the storage area inside the shelf. This shows that the amount of discharged air supplied from the storage area influences the formation of air curtain and also the amount of energy consumption. As a result of this study, we learned that the amount of energy used can be reduced by increasing the amount of discharged air within the storage area and enhancing back pressure.

• 한국도로학회논문집
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• 제19권3호
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• pp.83-90
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• 2017

PURPOSES : In this study, systematic road snow-removal capabilities were estimated based on previous historical data for road-snowremoval works. The final results can be used to aid decision-making strategies for cost-effective snow-removal works by regional offices. METHODS : First, road snow-removal historical data from the road snow-removal management system (RSMS), operated by the Ministry of Land, Infrastructure and Transport, were employed to determine specific characteristics of the snow-removal capabilities by region. The actual owned amount and actual used amount of infrastructure were analyzed for the past three years. Second, the regional offices were classified using K-means clustering into groups "close" to one another. Actual used snow-removal infrastructure was determined from the number of snow-removal working days. Finally, the correlation between the de-icing materials used and infrastructure was analyzed. Significant differences were found among the amounts of used infrastructure depending on snowfall intensity for each regional office during the past three years. RESULTS:The results showed that the amount of snow-removal infrastructure used for low heavy-snowfall intensity did not appear to depend on the amount of heavy snowfall, and therefore, high variation is observed in each area. CONCLUSIONS:This implies that the final analysis results will be useful when making decisions on snow-removal works.