• The Journal of Sustainable Design and Educational Environment Research
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• v.6 no.2
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• pp.66-90
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• 2007

The purpose of this study is to measure and analyze primary causes of indoor air pollution, including carbon dioxide, minute dust, and total volatile organic compounds, for each room before the beginning of a class through the time of discharge after the end of the class in general classrooms, computer rooms, and science rooms of three newly-established schools that opened in 2006, examine properties of indoor air environment in each room by educational activities at school, and determine effective management schemes; the results of this study can be summarized as follows: 1) As for implications for each item found in the mean for each place, since minute dust (PM10) was more likely to occur in time slots full of students' activities, such as a traveling class and a recess, than in the middle of a class and could be expected fully, it is necessary to make a scheme for cleaning in order to reduce minute dust within a room, for example, by usually using a vacuum cleaner indoors. 2) While carbon dioxide was expected to vary with the differences in the amount of breath between higher-graders and lower-graders in a general classroom but showed insignificant difference by grades, showing differences in pollution by four times at a maximum according to the opening of a window as expected, it is necessary to implement artificial or natural ventilation and take a positive measure, for example, by presenting a concrete ventilation scheme, in order to improve indoor air pollution at a room practice. 3) Total volatile organic compounds were found to exceed the standard by more than twice in general classrooms, science rooms, and computer rooms of the schools because of building materials, furnitures including desks and chairs, panels and boards for environment beautification, and items which could be detected even from students' clothes; while a field directly-reading tool was used, obtaining high reliability for the results, it is necessary to apply an analytical method based on process test separately for actual correct measurement if a significantly great amount of total volatile organic compounds appear as compared with other schools due to measuring expenses and consecutive measurements. 4) Since formaldehyde (HCHO) was generally found to exceed the standard in general classrooms, science rooms, and computer rooms, it is necessary to establish and operate a ventilator during a class in a computer room which requires airtightness and a science room in which an organic compound should be used for a class.

• Journal of the Korean Institute of Educational Facilities
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• v.25 no.2
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• pp.3-9
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• 2018

This study is designed to measure the indoor environment and research on the environmental situation in the lecture room where the lecture is conducted during the winter time in order to understand the level of environment in the lecture room and then suggest the method of improving the environment in the lecture room in the future. The findings are as follows. First, the number of ventilation measured at Lecture Room 1 was 1.2 times/hour while that at Lecture Room 2 was 2.2 times/hour. Second, the lighting at Lecture Room 1 and 2 was 650~700 lux while the noise at Lecture Room 1 and 2 was not more than 60dB. Third, Group 1 and Group 2 felt in the same way that the air quality in the lecture room was not good when the air quality was measured in 30 minutes after the start of lecture. Fourth, both Group 1 and Group 2 showed the lowered concentration on the class in 30 minutes after the start of the class when the room was heated. But Group 1 got less drop in the concentration when they was put in the non-heated room. Fifth, As for the change in the carbon dioxide volume during lecture, the carbon dioxide volume in the room where the windows was closed rose 1,000~1,400ppm from that at the time of start, thus showing that the indoor air quality got worsened. In addition, it is hard to control the indoor temperature due to the heating and non-heating. Accordingly, it is necessary to get the heating system which can make the ventilation in order to keep the environmental level in the lecture room to a certain level and keep the proper indoor temperature.

• Proceedings of the KIEE Conference
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• 2001.07a
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• pp.443-445
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• 2001

As the new large buildings are continuously being built with the advanced technology and skills, an adequate size of electric room needs to be obtained so that engineers establish an efficient and reliable system in the electric room. Considering the current capacity, its expansion and its connecting system, the final size of it should be determined in order to bring an effective use of the building. Usually the extension of electricity capacity is on the increase after construction and it comes from the lack of scientific evaluation on the electric room. Later when the expansion of computer and important electric equipment that needs much capacity is impossible, it will cause a great deal of damage to the renting business of the building as well as becomes the unstable factors of the whole system. Therefore, it is important to have the exact method of calculating the effective size of electric room, the heart of the building, especially when the value of land price is very high. In addition, it should be calculated in an accurate way due to the diversification of the system and the compact size of the electricity equipment. However, the research on this area and the comparison and evaluation of the size after construction have not been made enough and the results of them have not been applied when calculating a new size of electric room. Accordingly, this study examines three methods prescribed in the standards of electricity installation technology through case analysis and suggests substantial data by system, capacity, and purpose.

• Journal of the Society of Naval Architects of Korea
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• v.49 no.3
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• pp.227-231
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• 2012

In this study, a plastic hardening constitutive equation for steels of polar class vessels at low temperature is proposed. The equation was derived using the experimental data obtained from tensile tests at room and low temperatures. Tensile tests at low temperature are both costly and time consuming because an expensive cold chamber is necessary and it takes too much time to cool down a specimen to set temperature. Using the proposed plastic hardening constitutive equation the plastic hardening characteristics of steels for polar class vessels at low temperature can be easily predicted from the tensile test results at room temperature.

• KIEAE Journal
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• v.4 no.3
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• pp.187-194
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• 2004

In many other buildings, hospital is very important because of its function and purpose. A proper building service systems including heating, cooling, ventilation and plumbing systems is required in hospial. Besides, a special systems like medical gas, vacuum cleaning systems are required to prevent contamination as well as cure a patient in hospital. Ventilation is very important method to keep the indoor pressure and clean class. There are some specific rooms to consider clean class and indoor pressure in the general hospital. In this article, specific rooms were set to operating room, laboratory, ICU, isolation unit, and sterilizer room. In this case study, design factors of ventilation system, including air changes of OA and TA, indoor pressure, clean class, filter, and material of system, of specific rooms in hospital were proposed through a literature research and a design examples review.

• Special Issue of the Society of Naval Architects of Korea
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• 2006.09a
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• pp.40-45
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• 2006

For ships of ice class, finish Maritime Administration(FMA) requires brackets on intersections between longitudinal frames and the web frames within the ice-strengthened area. The main object of this paper is to verify ultimate load carrying capacity of longitudinal frame without brackets of engine room region of 74,100 DWT Product Oil Tanker. Comparative approach between proposed structures from builder (the proposed structure) and structures satisfying the Finnish-Swedish ice class rules (the rule structure) is used for the analysis.

• Journal of the Korean housing association
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• v.22 no.1
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• pp.95-104
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• 2011

The drawings that currently possessing by the Jangseogak Library, The Academy of Korean Studies is the material which were drawn the figure of house in Seoul (Hanseong-bu), during from the middle part of 17th Century to the end of 19th Century. Since these drawings were drawn in the form of Gangado (間架圖), the layout and floor plan, the function of room of each houses can be examined. Focusing on drawings on which the room name was written among those drawings, this Study has researched about the scale and space composition by each domains of the upper-class housing in Seoul, during the latter part of the Joseon Dynasty. Based on the originals, all of the drawings were redrawn using AutoCAD 2008, and the scale of site and building, the occupying area by domains were also analyzed, compared. As the result, it was investigated that the most part of upper-class housing in Seoul had far exceeded over the control limitation about the site size and the building scale in accordance with the status. Furthermore, in this Study, by means of concretely research on the space and room composition of each ranges of the upper-class housing in Seoul, it was quite examinable on the architectural figure of the upper-class housing in Seoul, During the latter part of the Joseon Dynasty, which was not known well in the meanwhile.

• Journal of the Korean housing association
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• v.23 no.4
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• pp.1-10
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• 2012

This study analyzed about Banbitgan of Anchae in High-Class Housing in Hanseong-bu (漢城府), Latter Part of Joseon Dynasty, by the drawings of Jangseogak Library. which were drawn the figure of house in Hanseong-bu (漢城府), during from the middle part of 17th Century to the end of 19th Century. These drawings were drawn in the form of Gangado ((間架圖), the layout and floor plan, the function of room of each houses can be examined. Focusing on drawings which the room name was written among those drawings, ascertainable form of Banbitgan. This Study has treated particular houses which houses were verified form of Banbitgan. As the result, it was investigated that Anchae of upper class housing in Hanseong-bu (漢城府), as the place where large-scaled housework was managed, its attached space has ever been developed. Especially, in this Study, by means of concretely research on the space organization of Anchae along with space composition and connection method of Banbitgan, the upper-class housing in Hanseong-bu (漢城府), it was quite examinable on the architectural figure of the upper-class housing in Hanseong-bu (漢城府), During the latter part of the Joseon Dynasty, which was not known well in the meanwhile.

• Child Health Nursing Research
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• v.10 no.1
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• pp.29-36
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• 2004

Purpose: This study was attempted to find out the actual conditions of drug education among the elementary school teachers. Method: 468 teachers consists of nurse-teachers 175, class-room teachers 240 and athletics teachers 53 of the elementary schools in Pusan city were subjected for this study. The period was December 23th through December 28th, 2002 and collected data was analyzed by SPSSWIN program using frequency, percentage, mean, standard deviation and ANOVA. Result: The results of this study were as follows: 1. The average point of nurse-teachers performance(2.11) was higher than that of class-room teachers(1.37) and athletic teachers(1.56). 2. Practical difficulties of drug education was no system in the curriculum for nurse-teachers(22.9％), insufficient expert knowledge for class-room teachers(26.3％) and a lack of education materials for athletics teachers(37.7％). For more effective drug education, 25.7％ of nurse-teachers hope to have more organized curriculum presentations, class-room teachers(24％) and athletics teachers(22.7％) hope that more various education materials will be developed. Conclusion: Based on this results, drug education contents is needed to supplement a drug use prevention program.

• Journal of the Society of Naval Architects of Korea
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• v.49 no.4
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• pp.281-286
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• 2012

Single frame structures with notches were fractured by applying drop impact loadings at room temperature and low temperature. Johnson-Cook shear failure model has been employed to simulate the fractured single frame structures. Through several numerical analyses, material constants for Johnson-Cook shear failure model have been found producing the cracks resulted from experiments. Fracture strain-stress triaxiality curves at both room temperature and low temperature are presented based on the extracted material constants. It is expected that the fracture strain-stress triaxiality curves can offer objective fracture criteria for the assessment of structural fractures of polar class vessel structures fabricated from DH36 steels. The fracture experiments of single frame structures revealed that the structure on low temperature condition fractures at much lower strain than that on room temperature condition despite the same stress states at both temperatures. In conclusion, the material properties on low temperature condition are essential to estimate the fracture characteristics of steel structures operated in the Northern Sea Route.