• The KSFM Journal of Fluid Machinery
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• v.12 no.1
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• pp.28-34
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• 2009

The objective of this study was to draw the most suitable plan of an automatic domestic solid waste collection system for land development area. The results of this study indicated that the most suitable plan is identified as a land development area larger than 3,600,000 $m^2$ located in the metropolitan area with an incinerator system (or MBT). There are the cases smaller than the standard area but this may cause additional allotment from the residents. According to a rating method to compute the size of the most suitable plan, installation of an automatic clean network has to be minimized if the rated score is below 2.0. On the other hand, the installation is required if the rated score is above 2.5. For a certain circumstance, a cautious decision has to be made for installation of the automatic domestic solid waste collection system by considering the influence of the initial cost, sale price, residential allotment, and maintenance cost on the land development.

• Journal of Korean Society of Water and Wastewater
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• v.23 no.2
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• pp.231-239
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• 2009

The purpose of this research is to provide more reliable water unit factors of domestic airports by investigating of general informations related to the domestic airport. The informations of domestic airports such as passengers, settled population of airports, building areas and water amount are investigated to estimate the unit factor of water of domestic airports. The domestic airports are divided into three type such as central airport, position airport and general airport. Through analysis of relationship between water amount and the others, the unit factor of water could be calculated. The water amount of central airport as Incheon international airport and position airports could be estimated by unit factor of settled population. The others could be estimated by unit factor of building area.

• Asian-Australasian Journal of Animal Sciences
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• v.16 no.2
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• pp.266-268
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• 2003

This paper makes an analysis of the ecological behaviours of 3 categories of quails, namely wild Japanese quails from the Weishan Lake Area, medium-sized domestic quails and pint-sized domestic quails. The study indicates as follows: (1) There is difference in morphological and biological habits between domestic quails and wild Japanese ones. (2) The cross-breeding between the wild and domestic quails is a cross from exclusion to affinity. (3) The behaviours of quails such as pursuit,paw and mating are selective. (4) The wild Japanese quails and domestic ones can succeed in mating and in reproducing fertilized eggs but with a low rate. (5) Evolutionary differentiation has been formed in varying degrees between the domestic quails and their wild ancestors in morphological and ecological characteristics.

• Proceedings of the Korean Society of Agricultural Engineers Conference
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• 2000.10a
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• pp.500-506
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• 2000

Discharge characteristics of pollutant loadings from domestic systems were estimated in the catchment of a reclaimed area, Saemankeum. Pollutant loadings was estimated according to the discharge pattern of small treatment facilities. Recycled-fertilizer system was dominant in this area.

• Asian-Australasian Journal of Animal Sciences
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• v.16 no.10
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• pp.1421-1423
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• 2003

Cross fertility between wild Japanese quail and domestic quail was explored in an experiment conducted on 18（3♂, 15♀）wild Japanese quails in Weishan Lake area, 18（3♂, 15♀）medium-sized domestic quails and 18（3♂, 15♀）pint-sized domestic quails, which were divided into nine groups. This study demonstrated that wild quail could succeed in crossing with domestic quail,producing fertilized eggs and hatching first filial generation. The findings indicated that there were no reproduction isolation between the wild Japanese quail and domestic quail, and that the best cross combination was between wild male quail and medium-sized domestic female quail, in which the fertility rate and hatchability of fertilized eggs amounted to 42.86% and 29.63% respectively. Based on the results, a new way could be adopted to protect, exploit and utilize genetic resources of wild quail.

• Korean Journal of Air-Conditioning and Refrigeration Engineering
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• v.29 no.2
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• pp.51-56
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• 2017

In the case of office buildings, domestic and Chinese evacuation laws were compared regarding the evacuation of horizontal and vertical buildings and evacuation to refuge safety areas. A simulation was conducted based on a refuge safety area in China. In the case of evacuating 1 floor, there was no significant difference in the flow of occupants to an ancillary room area in a domestic or Chinese building, but in China, the corridor width was narrower and the occupants have saw a long. In the case of evacuating 15 floors, the flow of occupants to an ancillary room area was different. In the case of China, it was possible for occupants to enter the ancillary room more quickly because the ancillary room area was wider than those found in domestic buildings, allowing quickly passage the ancillary room door. The results of this study found that if corridor width and ancillary room area were wider, evacuation times could be reduced.

• Proceedings of the KSRS Conference
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• 2003.11a
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• pp.1018-1020
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• 2003

The costal area where takes up over 32% in domestic teritory is considered as very importantly because it has not only economic facilities such as harbor and an industrial complex but also recreation facilities. Moreover, the tidal flat area has been used as culture ponds and salt farms because this area is occupied by various oceanic species. Also, the tidal flat area has played an important role to purify ocean pollution and maintain an ecosystem. However, the costal ecosystem has seriously threatened by domestic reclamation projects and a large-scale tide embankment during recent 10 years in Korea. This serious problem results in loosing 34%(810$km^2$) of the entire domestic costal area. In this paper, the micro-landform in the tidal flat area, which is called as Garolim bay in Korea, is classified by using Landsat TM images also verified through a filed report. Through the result of this, the tidal flat area is expected to manage efficiently especially through analyzing sediment environment and characteristic of grain size by using satellite images.

• Solar Energy
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• v.6 no.1
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• pp.47-59
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• 1986

This paper presents the establishment of optimum design conditions and economic evaluation for solar hot water system. The aim of this study is to present thermal performance of solar heating systems and to determine their performance as a function of collector size, storage capacity, tilting of collector and other factors. By analyzing its performance under the various conditions, optimum design of solar heating system can be obtained. System performance are obtained monthly and yearly basis respectively. At the same time the economics of various systems are evaluated. For the computer simulation Mokpo, Kangnung, Chupungnyong and Seoul are selected for particular installation places. As a result, the optimal design condition of solar heating system considering the following factors such as installation angle of collector, capacity of storage tank, collector size in each place can be obtained as follows; (1) Installation angle of collector Tilt = lattitude (2) Capacity of storage tank Solar domestic hot water system : $45\;1/m^2$ Multifamily solar domestic hot water system : $35\;1/m^2$ (3) Collector size i) Solar domestic hot water system Seoul & Chupyungyong area : $11.52\;m^2$ Mokpo area : $8.64\;m^2$ ii) Multifamily solar domestic hot water system Seoul, Chupyungyong & Mokpo area : $345.6\;m^2$ Kangnung area : $259.2\;m^2$

• Korean Journal of Computational Design and Engineering
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• v.20 no.1
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• pp.11-21
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• 2015

Currently, the United States, the United Kingdom, Australia etc. are actively utilizing energy simulation for efficiency evaluation of building energy. However, domestic energy efficiency assessment system doesn't use energy simulation system properly at present: parameters based architecture plans and Ashrae Standard are inputted for the evaluation, because the input parameters for the simulation haven't been established yet. This fact causes poor reliability during energy simulation, as the values of the two standards are different from each other. Therefore, the aim of the study is to set domestic standard parameter for BIM-based energy performance evaluation, focusing on possession area per person of occupants at government office in Korea. We found that the difference among the result values occurred approximately 3% in the energy simulation. As a result of the analysis, possession area per person of occupants in Government office is $31.87m^2$. Other input parameters may be set based on this. This will increase the reliability of energy simulation through a domestic standard parameter.

• Journal of the Korean Society of Marine Environment & Safety
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• v.28 no.2
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• pp.235-243
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• 2022

A total of 97,623 ships were registered in Korea in 2019. Among these, 65,835 vessels, accounting for approximately 67 % of the total number of ships, were registered as fishing vessels. As with the proportion of fishing vessels, the frequency of marine accidents is also high. In 2020, 2,331 of 3,535 accidents occurred on fishing vessels. Hence, various institutional arrangements are required for improving the safety of domestic fishing vessels. In this study, we examined domestic and international regulations on domestic and foreign control performance related to fishing boats for improving the safety of fishing boats. Additionally, the ratio of the rudder area of 153 fishing boats operating in Korea was investigated to examine the current status of the rudder area design of fishing boats whose design standards have not been clearly established compared to fishing boats. Resultantly, we statistically confirmed that most fishing boats were designing rudder areas because they did not meet international standards. In the future, these analysis results can be used as basic data to prepare rudder area design standards for improving the maneuvering performance of domestic fishing boats.