• Korean Chemical Engineering Research
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• v.54 no.5
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• pp.630-635
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• 2016

In the prior work, we studied a ballast water treatment apparatus, which is secondary pollution free by using physical treatment of shear stress. The principle of this apparatus is smashing various microorganisms by shear stress generated between stationary outer cylinder and revolving inner cylinder. Because of various magnitude of shear stress according to the inner cylinder surface type and revolution speed, an appropriate surface type and optimum revolution speed should be studied by consecutive experiment to determine the reference data for commercial apparatus. Through a comparative study of disk type and cylinder type of ballast water treatment apparatus, cylinder type is turned out to be superb to disk type. In this study, we studied to determine the superior collaboration of cylinder type, groove type and knurling type of inner cylinder to non patterned outer cylinder, and to optimize the revolution speed and flow rate according to the gap between inner cylinder and outer cylinder. As a result, we could get perfect sterilization effect at groove type under the conditions of 250 mL/min of flow rate at 8,000 rpm and 500 mL/min of flow rate at 10,000 rpm respectively.

• Human Ecology Research
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• v.52 no.6
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• pp.639-649
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• 2014

The main purpose of this study was to find the relationship between the delinquency-onset time in the source and the continuity of delinquency. In order to achieve this objective, we divided 350 first-year high school students into three groups early-onset type, late-onset type, and non-delinquent adolescents on the basis of the delinquency onset. The results of this study were as follow: (1) for the boys, the early-onset type shows a higher continuity of delinquency than both the late-onset type and the general adolescents. On the other hand, for the girls, the early-onset type shows a higher continuity of delinquency than the late-onset type, but there was no difference in the persistence duration between the late-onset type and the non-delinquent adolescents. (2) For the boys, the examination reveals that the early-onset type has a higher degree of sensation seeking and impulsivity than the general adolescents. In addition, the early-onset type shows a higher degree of sensation seeking than the late-onset type, whereas the two show no difference in impulsivity. For the girls, sensation seeking did not show any difference depending on the delinquency onset. However, more impulsivity appeared in the early-onset type than in the late-onset type or the non-delinquent adolescents. (3) The relative priorities of variables determining the group to which the students belong on the basis of the delinquency onset are in the order of sensation seeking and juvenile impulsivity. Therefore, this study, suggests that the early-onset type requires a different kind of intervention than the late-onset type.

• Korean Journal of Environment and Ecology
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• v.25 no.3
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• pp.327-357
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• 2011

This study compared the species composition and distribution of the forest communities between Korea and Japan using vegetation releve database. The study included the eastern and southern Korean Peninsula, Is. Jeju, Is. Ulreung, northern Kyushu, central part of Japan and Is. Tsushima and divided in fourteen region with major mountain as the center. Seventy-nine forest communities were classified by tabular comparison with the total of 1844 releves. In the composition table, fifty-four groups of plant species were listed. Some grew in one area exclusively, while others were present in multiple locations. This study showed the similarity and heterogeneity of species composition among study areas. We grouped fourteen types showing similar physiognomy for forest communities. The physiognomical features of the vertical vegetation zones in the study area were similar, however, dominant species and species composition were different between the regions. In the lowland zone, Castanopsis-Type dominated by Castanopsis cuspidata var. sieboldii or Castanopsis cuspidata were distributed in the study area except for northern part of the Korean Peninsula and Is. Ulreung. Additionally, Persea thunbergii-Type was distributed widely in the lowest part of the study area, however, it showed the simplification of the species composition in the Korean Peninsula and Is. Ulreung. In the hilly zone, evergreen forest composed by Abies firma-Type distributed in northern Kyushuand Is. Tsushima, but it was absent in the other study region. The difference in forest community was conspicuous, especially in the montane zone. Deciduous broadleaved forests composed Quercus(D)-Type and Fagus-Type widely distributed in the montane of study area. However, forest community dominated by Quercus mongolica and Fagus multinervis flourished in Korea. On the otherhand, forest community dominated by Quercus mongolica var. grosseserrata, Fagus crenata and F. japonica distributed in Japan. In the sub-alpine zone, evergreen coniferous forest composed Abies-Quercus(D)-Type, Abies koreana-Type, and Pinus pumila-Type were distributed in the Korean Peninsula and Is. Jeju. Forests composed Taxus cuspidata var. nana-Type, Abies mariesii-Type, and Pinus pumila-Type distributed in the central part of Japan. As a result of DCA ordination, evergreen broadleaved forests of the whole study area showed the lower scores along the first axis, while deciduous and coniferous forests showed the higher scores. The forest types of western part of Japan were located the higer scores, forest types of the Korean Peninsula were located the lower scores, and forest types of Is. Jeju located in the middle. Warmth index (WI) and Annual range of temperature in climate factor were highly correlated on the first axis. The first axis reflected the gradient from oceanic climatic to continental one. The higher the altitude and further geographically, the lower the similarity among communities and the peculiarity of community appeared stronger. The historical background reflecting local flora has strongly influenced on development of community.

• The Journal of the Korea Contents Association
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• v.20 no.3
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• pp.390-399
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• 2020

The purpose of this study was to apply Q methodology to the graduate students who have a good reputation in the food service industry in Seoul, in order to grasp the subjective perception of the customers about the small-scale banquet menu promotion of luxury hotels. As a result of the type analysis, a total of four were derived. Type 1 (N = 4): Banquet menu configuration comparison type, Type 2 (N = 5): Banquet food hygiene-seeking at a Type, Type 3 (N = 3): Banquet menu quality satisfied type, Type 4 (N = 6): Banquet course focus type. Based on this study, it will be used as basic data for the direction of the development of small-scale banquet menu promotion of the luxury hotel, the boom of the domestic hotel industry, and the service quality in the future.

• Journal of architectural history
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• v.28 no.3
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• pp.19-28
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• 2019

The purpose of this study is to identify the form and components, decoration and locality of pyongnangans(平欄干) in Yangban's Houses(32 Houses) in Gyeongbuk region, The results of this study, which were carried out through both survey and on-site study, are as below. First, Pyongnangans of Gyeongbuk region Yangban's Houses can be classified into 4 different types, which are (1)Mureum type, (2)Gyoran(交欄) type, (3)Mureum-Saldae combination type, (4)Simplified Saldae type. And these 4 types are again subdivided into eight types, depending on differences of both detailed form and framework. Gyoran type are the most common cases in Yangban's Houses of Gyeongbuk region, whose number is followed by the order of Mureum type, Mureum-Saldae combination type and Simplified Saldae type Pyongnangans. Decorative 亞 shaped Gyoran type are more set up in Sarangchaes than in Anchaes, and this was because Decorative Gyorans are more appropriate to show the Social status and class of a patriarch than humble Mureum type. Pyongnangans of Yangban's Houses in Gyeongbuk region have their peculiarities in the exclusion of decorativeity, by consistent use of plain single-layer Pyongnangans. A certain locality is reflected on the types and detailed forms of Pyonnangans. Mureum type are widely found in Gyeoungju region Yangban's Houses, while Gyoran type were more often used in Andong region. In Bonghwa region, Mureum-Saldae combination type are found in large quantities. This was due to the locational chateristics of Sarangchaes in Bonghwa region, which were usually built on steep slopes.

• The Journal of the Korea Contents Association
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• v.14 no.1
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• pp.505-514
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• 2014

This study was researched by practical method in a subjectivity study accessible in-depth, in sloughing off old habit of functional quantity analysis about food preference of an expressway resting place customer. The perception pattern come out in this study were divided into four types in Q-methodology. The result is as follows ; it is that divided '1[(N=7) : Cleanliness-selection Type], 2[(N=13) : Economy Type], 3[(N=9) : Selling-area Goodwill Type], 4[(N=10) : Self-satisfaction Type]'. Like this, it found that is very different type all over. Hereafter, this study is to ascertain acceptance behavior about reception type on food-preference of an expressway-resting-place-customer ; to offer a developmental suggestion about it.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.12 no.6
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• pp.2535-2542
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• 2011

This study was researched by practical method in a subjectivity study accessible in-depth, in sloughing off old habit of functional quantity analysis about product-selectivity on role of Home-shopping TV MD. The perception pattern come out in this study were divided into four types in Q-methodology. The result is as follows ; it is that divided '1[(N=9) : No-relationship Type], 2[(N=3) : Experience-oriented Type], 3[(N=5) : Ability-focus Type], 4[(N=1) : Drive-importance Type]'. Like this, it found that is very different type all over. In conclusion, this study is to ascertain acceptance behavior about Reception Type on product-selectivity on role of Home-shopping TV MD ; to offer a developmental suggestion about it.

• Journal of Auto-vehicle Safety Association
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• v.12 no.4
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• pp.39-47
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• 2020

In this study, crash situations of representative bus crash types were elicited by analyzing a total of 1,416 bus repair record which were collected in 2018~2019. K-means clustering was used as a methodology for this study. Bus repair record contain the information of repair term, type of bus operation, responsibility of accident, weather condition, road surface condition, type of accident, other party, type of road and type of location for each data. Also, by checking collision parts of each bus repair record, each record was classified by types of collision regions. From this, 760 record are classified to frontal type, 363 record are classified to middle-frontal type, 374 record are classified to middle-rear type and 331 record are classified to rear type. As mentioned, k-means clustering was performed on each type of collision parts. As a result, this study analyzed the severity of bus crash based on actual bus accident data which are based on bus repair record not the crash data from the TAAS. Also, this study presented crash situation of representative bus crash types. It is expected that this study can be expanded to analyzing hydrogen bus crash and defining indicators of hydrogen bus safety.

• Korean Institute of Interior Design Journal
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• v.23 no.6
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• pp.195-203
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• 2014

This study selects factors affecting form type of hospital architecture by considering studies and references on hospital architecture type in korea and other countries in general. Also this study classifies general hospitals chronologically and analyzes type change of general hospitals in relation with periodic change of healthcare environment. Through this, this study aims to analyze chronological change of general hospitals' form type and provide the current of hospital architecture's general type. The form type classification of this study is classification according to the form of ward, classification according to the relationship between ward and D.T.D(Diagnostic and Treatment department), classification according to the relationship between O.P.D(Out Patient department) and D.T.D, classification according to the rate of centralization, classification according to the circulation system. The form type of ward changed from plate type to tower type, and the circulation system of ward changed from middle corridor to double corridor, the number of Team Nursing chaged from 1 to 2 in 1990. On the other hand the chage of others classifications took place from 1990' to 2010'. It is judged that this overall change is appeared by a change from an inpatien-oriented system to an outpatient-oriented system followed by an increase in number of outpatients, an increase in amenities in ground floor and adoption of healing environment for patients and visitors.

• The Journal of the Korea Contents Association
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• v.12 no.3
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• pp.461-469
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• 2012

This work was researched by practical method in a subjectivity study accessible in-depth, in sloughing off old habit of functional quantity analysis about reception type on movie-viewing perception. The perception pattern come out in this study were divided into four types in Q-methodology. The result is as follows ; it is that divided '1[(N=18): Personal-decision Type], 2[(N=14): Media Dependence Type], 3[(N=10): Self-leading Type], 4[(N=3): Positive Preference Type]'. Like this, it found that is very different type all over. Hereafter, this study is to ascertain acceptance behavior about reception type on movie-viewing perception, 21th ; to offer a developmental suggestion about it.