• 한국소음진동공학회논문집
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• 제22권7호
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• pp.685-691
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• 2012

It is essential for the accurate time-domain prediction of broadband noise due to turbulence-cascade interaction to develop inflow/outflow boundary conditions to satisfy the following three requirements: to maintain the back ground mean flow, to nonreflect the outgoing disturbances and to generate the specified input gust. The preceding study showed that perfectly matched layer(PML) boundary condition was successfully applied to absorb the outgoing disturbances and to generate the specified gust in the time-domain computations of broadband noise due to interaction of incident gust with a cascade of flat-plates. In present study, PML boundary condition is extended in order to predict steady mean flow that is needed for the computation of noise due to interaction of incident gust with a cascade of airfoils. PML boundary condition is originally designed to absorb flow disturbances superimposed on the steady meanflow in the buffer zone. However, the steady meanflow must be computed before PML boundary condition is applied on the flow computation. In the present paper, PML equations are extended by introducing source term to maintain desired mean flow conditions. The extended boundary condition is applied to the benchmark problem where the meanflow around a cascade of airfoils is predicted. These illustrative computations reveal that the extended PML equations can effectively provide and maintain the target meanflow.

• 한국의류산업학회지
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• 제19권4호
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• pp.385-399
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• 2017

This study will broaden the application of doll costume product with historical characteristics and the image of unlined cheollik in the $17^{th}$ century period of transition during the Joseon Dynasty. Historical design sources were extracted from old documents and precedent studies. Unlined cheollik of Shin Gyeong-yu, meritorious retainer, were selected as main reference-relic because of various fabric, preserved conditions and definite shape. 'Baby doll' was selected as main model because of consumer preferences and awareness. Design sources from unlined cheollik in the early $17^{th}$ century were about a 1:2 ratio of upper and under parts, removable separated doori-somae, knife-shaped collar (outside), projected square collar (inside), long pleats line, side slit, traditional flat fell seam sewing. Trapezoidal side line, round waistline, and thin fabric were applied in designs because of toddler-body of doll model. Three designs were produced in step 1: Cheollik A focusing on the historical remake (traditional type), Cheollik B with belt and side slit (crossover type), and Cheollik C with back- opening (modern type). In step 2, interview with fashion major student was conducted to increase the utility of designs. As a result, modern trend sources (frill, velcro, round armhole line, slope of sleeves, and floral pattern) were reflected in Cheollik B, C. Finally, three doll cheollik and cheollik-styled doll apron sample were produced. Various versions must be suggested in the study of doll costume products with traditional sources that balance historical characteristics and practicality to improve customer satisfaction.

• 한국수산과학회지
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• 제44권3호
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• pp.259-266
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• 2011

To produce cupped oyster sprat consistently, we investigated the efficiency of nine settlement substrates using selective breeding of Pacific oyster Crassostrea gigas, with the goal of popularizing off-bottom culture on the west coast of Korea. We also compared the growth and survival of selectively bred sprat (diploid) with triploid sprat from an off-bottom culture system. Considering, the attachment rate and detachment efficiency, producing cupped oyster in a polypropylene gunny bag proved to be the most effective method. There were no differences in shell growth or total weight between the diploids from selective breeding and triploids from off-bottom culture for 5 months. However, the survival rate was 8 times higher in the diploids than the triploids. Transplanting sprat from selective breeding is one way to restore oyster farms and nurture off-bottom culture along the west coast.

• 한국콘텐츠학회논문지
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• 제11권3호
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• pp.201-210
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• 2011

임진왜란 해상전투에 사용된 이순신의 거북선 복원에 대한 논쟁은 계속되고 있다. 그 이유는 임진왜란에 사용된 거북선의 외부, 내부구조와 형태를 구체적으로 파악할 수 있는 사료(史料)가 현재까지 남아있지 않기 때문이다. 현재 복원된 거북선은 정조 19년(1795)에 왕명으로 편찬된 이충무공전서의 전라좌수영, 통제영 거북선의 목판화 그림과 설명문, 사료의 내용을 토대로 복원되었으나 두 거북선은 임진왜란 후 203년 뒤인 정조대의 거북선으로 임진왜란 당시의 거북선과는 같지 않고, 현재 복원된 임진왜란 이순신의 거북선은 임진왜란 당시의 문헌의 기록과 일치하지 않는 구조적, 형태적인 많은 문제점을 가지고 있다. 문헌에 나타난 최초의 거북선 그림인 1593년 이덕홍 귀갑선도는 그동안 거북선의 연구에서 중요시 되지 않았으나 임진왜란과 시기적으로 일치하고 그림 해석을 통한 구조분석과 판옥선, 전라좌수영, 통제영 거북선과의 관계를 분석하면 개판 윗면의 중앙부분은 평면구조이고, 전후좌우로 창검이 꽂혀있는 구조로 임진왜란 당시 기록의 내용에 접근된 거북선의 구조와 형태를 도출할 수 있다.

• 한국의상디자인학회지
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• 제11권1호
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• pp.133-153
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• 2009

Clothing was excavated when the Bae's clan of Seong-san, Yeong-dong, Chung-buk in Sep. 2, 2004. The tombs that the clothing could be restored were the tombs of Bae Cheon-jo(10th generation) and the tomb of Mrs. Nam of Go-seong, the wife of Bae Sang-gyeong(1lth generation). For identifying the features and methods of sewing used for the clothing of man and woman around Po(coat in Korea in the past) in the 16th to 17th century, this study investigated 12 items from Bae Cheon-jo's tomb(Sibok, Dopo(robe), Jungchimak(outer coat with large sleeves) and Gwa-du and 5 items(Jangok(lady's cloak) and Jungchimak) from Mrs. Nam's tomb of Go-seong. For sewing, broad-stitching, hemming and even-back-stitching were used the most in that order. Furthermore, various kinds of sophisticated stitching including old flat felled seam, decorative saddle stitching and buttonhole stitch, clothing made roughly as a shroud and fabric attached on the clothing were also observed. We may not have many opportunities to understand the change of clothing in Korea from mid 16th century to mid 17th century through the clothing of father-in-law and daughter-in-law in a family. As a result, we will be able to understand the features of sewing in a family and from the 16th century to the 17th century.

• 한국의류학회지
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• 제17권4호
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• pp.539-549
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• 1993

The purpose of this study was to find out the moving fitness and slit length of tight skirt in relation to its length & silhouette. Five kinds of length, micro mini, mini, natural line, medi and maxi, and two kinds of siihuette, slim & straight-a total of ten tight skirts-were investigated. Ten college students were chosen for this experiment. The moving fitness was tested by measuring the step length, step width and step angle in the case of walking on the flat and going up the stairway & bus stair. The slit length was tested by measuring the back slit length needed in the case of going up stairway & bus stair. Data were analyzed with use of SAS pakage. The statistics were based on average, standard diviation, two-way ANOVA, Pearson's correlation and multiple regression analysis. The main results were as follows. 1. There was significant difference in the moving fitness according to length & silhouette of tight skirt. The moving fitness of slim type was lower than that of straight type and the longer the skirt length was, the lower the moving fitness was. The significance appeared particularly in the case of going up the bus stair. 2. There was significant difference in the skirt length obove slit accorting to length & silhouette of tight skirt. The skirt length obove slit of slim type was shorter than that of straight type. The longer skirt length was, the longer it was from micro mini to natural line, that of medi skirt was shorter or a little longer than that of natural line skirt and there was little change from medi skirt to maxi skirt.

• 한국의류학회지
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• 제29권8호
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• pp.1079-1091
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• 2005

The purpose of this study was to point out the unification of the size of swimming headgear by measuring detailed measurement of head ferm and systematizes the head form. A total of 300 male and female Korean adults aged from 18 years old to 35 years old were measured through the direct measurement method. This study attempted to identify the head form of male and female adults using measurement data and the head form was classified through factor analysis and cluster analysis. (1) Based on the fact that this study especially focuses on the size of swimming headgear, factor analysis was performed far both direct measurements with hair and without hair. For the measurements with hair, seven factors were extracted. They were head thickness factor, head width factor, width of side head factor, height of back head factor, length of front head factor, circumference of front head factor, thickness of front head factor and head height factor. They explained the $70.95\%$ of the measurements. (2) The cluster analysis was executed to classify the somatotype of the korean head form on the basis of similarity. According to the cluster analysis result, the measurements with hair categorized types, 'Woman's long-hair type', 'Small type', 'Long and flat type', 'Large type'. (3) Head circumference B and Left tragion - Vertex - Right tragion circumference which are generally length and width in choosing swimming headgear size were selected as measurement items far size of swimming headgear. Direct measurements and sizes of four swimming headgear with different materials taking into account their elongation rate were also compared.

• 대한통합의학회지
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• 제1권4호
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• pp.57-66
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• 2013

PURPOSE: The purpose of this study was to investigate the effects using pressure biofeedback and teaching abdominal hollowing exercise on pelvic stabilization during the active straight leg raising test. METHOD: The subjects were divided into 3 groups who were fourty eight healthy participants, aged 20~25 years recruited for this study. First group wad control group. This group didn't any education. Second group was teaching them for a week. And last group was teaching abdominal hollowing exercise. The rotation angles of pelvic were measured by the motion anayalyser on flat surface and on form roll for the active leg raising. RESULT: Using pressure biofeedback and teaching abdominal hollowing exercise groups were significantly effective than control group in rotation angles of pelvis. And using pressure biofeedback group was more effective than teaching core stability muscles contraction group. CONCLUSION: This study suggested that patients with low back pain and pelvic instability can improve pelvic stabilization through pressure biofeedback and teaching abdominal hollowing exercise.

• 한국수산과학회지
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• 제16권2호
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• pp.75-81
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• 1983

1981년 7월부터 1982년 6월까지 매월 부산 해운대 동백섬 해안에서 낚시와 삼중자망으로 채집한 노래미(Agrammus agrammus)의 추체를 사용하여 연령과 성장을 조사하였다. 추체반경과 어체의 전장 간에는 직선회귀관계가 있었다. 추체의 불투명대에서 투명대로 이행하는 경계를 윤문으로 간주한 본연구에서의 윤문은 매년 $7{\sim}8$월에 형성되었고, 제1, 2, 3, 4 윤문이 형성되는 데는 각각 0.67년, 1.67년, 2.67년, 3.67년이 걸렸다. 비만도의 월별변화로 조사한 산란기는 12월로 추정되었다. 각 윤문이 형성될 때의 전장을 역계산하여 다음과 같은 버트란피 성장식을 구할 수 있다. $l_t=31.68(1-e^{-0.189(t+1.458)})\;W_t=528.30(1-e^{-0.189(t+1.458)})^3$이 식으로부터 구한 추정전장은 실측전장과 잘 일치하였다.

• 한국소음진동공학회:학술대회논문집
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• 한국소음진동공학회 2003년도 춘계학술대회논문집
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• pp.802-807
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• 2003

International Convention Center Jeju(ICCJ) was planed and built for accommodating a variety of conventional and exhibitional activities. For a better flexibility of operation, almost all rooms in ICCJ are designed to be subdivided Into a couple of small rooms with installation of movable partition walls. Architectural and acoustical design should be deliberatively and cooperatively undertaken to cope with such a complex condition. Conference hall, the largest room in ICCJ, has a capacity of 5000 seats who:1 used as a whole. It could be divided into 3 halls, one with 2000 pre-installed seats on slanted floor, up/down removable stage and its settings above, and the other 2 flat rooms with no seats installed. A devided hall with pre-installed seats and stage is designed for a multi-use auditorium. Almost all surfaces except ceilings adjacent to the stage are sound absorptively treated, in regard to extensive use of sound reinforcement systems. Its reverberation time 1.65 sec without audience, which is roughly correspond to 1.50 sec with fully occupied audience. When there is a need for a larger room, all the partition wail Is removed and the hall could be used as a whole. Exhibition hall is located in the first floor of ICCJ. Absorption and softness are needed for the hat 1 because exhibition behavior has something noisy features. Perforated MDF panels with porous materials and air space in the back groundare adopted for the walls. There are one large, two medium, and several small convention rooms in ICJJ. The room are also acoustically designed for maximum flexibility with no defects soundwisely.