스쿠버다이빙 참가유형에 따른 라이프스타일에 관한 연구

윤상문,최정도 한국스포츠리서치 2004 한국 스포츠 리서치 Vol.15 No.2

The purpose of this study was to investigate opportunities in the scuba diving market and examine the lifestyles of scuba diving customers based on the pattern of their participation in scuba diving in order to provide the important data for developing effective marketing strategies. The subjects included 843 scuba diving customers of scuba diving resorts or scuba diving pro shops in the Republic of Korea. They were asked to complete a survey at either a resort or a pro shop. The statistical analyses were performed by using the SPSS 10.0 software. The statistical techniques used for analysis were factor analysis, reliability analysis, frequency. One-way ANOVA, and Scheffe's post hoc test. Statistical significance was accepted at an alpha level of p<.05. The major findings of this study were as follows: First, individuals pursuing for health showed the highest participation in scuba diving at four times or more a week. It was followed by innovators who were very receptive to new ideas, individuals valuing social recognition, and individuals who were followers of fashion and trends. Second, individuals with less than 3 years of scuba diving experience were most often found among the followers, and followed by conservative people. Individuals with at least 11 years of scuba diving experience were most often found among the innovators, and followed by the individuals valuing social recognition. Third, individuals with advanced scuba diving skills were most often found among the individuals pursuing for health. It was followed by the innovators, and the individuals valuing social recognition. In the meantime, the beginners were most often found among the followers and the conservative people. Fourth, all different lifestyle groups showed significantly differences when they participated in scuba diving with their colleagues, friends or alumni. The individuals pursuing for health showed the highest difference and were followed by the innovators, the individuals valuing social recognition, the followers, and the conservative people. Fifth, the conservative group showed significantly higher interest in improving health and fitness as a reason to participate in scuba diving. The individuals valuing social recognition showed significantly higher interest in learning scuba diving skills, the followers participated in for social reasons, and the individuals pursuing for health and the innovators wanted to have a scuba diving career.

解體主義 建築 디자인의 表現特性에 관한 硏究

尹道根,李正旭,李一珩,黃泰周 弘益大學校 1993 弘大論叢 Vol.25 No.2

The characteristic of Formal Expressions in Deconstructive Architecture were summerized in four features through the results of the analysis. They are as follows. 1) `The relation of architectural element and intertextuality' is expressed in discontinuation of context and refusal of functional building. 2) The concept of trace expresses as connection of place, decomposing of excavation of trace, trace of axis, trace of fragments. 3) Anti-gravity expression is there to express of open cubic, to outgrow of rectangular system, to outgrow of volume, to separate of ground connection. 4) The complex compositon of abstracted geometric form is there to abstracted geometry about indefinite shape, to layer through the overlap and collage, to de-meaning and amusement of form through the pursuit of uncertainty, to indeterminate of formal meaning through operation and composion of similar form cause to the diverse of meaning.

동결온도가 진공포장 동결육의 품질에 미치는 영향

정인철,김도완,문귀임,강세주,김기영,문윤희 한국식품영양학회 1998 韓國食品營養學會誌 Vol.11 No.4

본 연구는 진공포장 동결육의 품질에 미치는 영향을 검토하기 위하여 수행하였다. 해동드립은 -3℃와 -20℃ 동결이 60일째 각각 5.23% 및 5.17%로 동결기간이 경과함에 따라 현저하게 증가하였다. 가열감량은 water bath와 pan에서 가열한 것이 모두 동결초기보다 동결기간이 경과함에 따라 현저하게 증가하였다. 그러나 -3℃와 -20℃ 사이에는 현저한 차이가 없었다. 염용성 단백질의 추출성은 동결기간이 지남에 따라 감소하였고, -20℃ 동결이 -3℃보다 추출성이 더 높았다. 수용성 단백질의 추출성은 동결기간이 경과하면서 증가하였고 -3℃ 동결이 -20℃보다 현저하게 높았다. 그리고 L, a 및 b값은 저장초기가 동결저장 중보다 높다. Myoglobin의 변성율은 -3℃ 동결이 -20℃보다 비교적 높게 나타났는데, -3℃ 동결의 15일째가 96.0%로 가장 높게 나타났다. 전단력가는 동결저장 중 현저한 변화가 없었고, 근원섬유의 소편화도는 동결초기보다 동결저장이 더 높았지만 동결저장 중에는 변화가 없었다. pH는 -3℃와 -20℃ 동결저장 모두 45일까지 감소하다가 그 이후에는 증가하는 경향이었다. This study was carried out to investigate the effects of freezing temperature on quality of vacuum packaging freezed beef. In case of thaw drip loss, the freezing of -3℃ and -20℃ were 5.23% and 5.17% to 60 days respectively, were increased significantly during freezing. The cooking loss of water bath and pan were increased significantly during freezing than the beginning of freezing, but were no different between -3℃ and -20℃. The salt soluble protein extractability was decreased during freezing, the -20℃ freezing was higher than -3℃ freezing. The water soluble protein extractability was increased during freezing, the -3℃ freezing was higher than -20℃ freezing. The L, a and b value of the beginning of freezing higher than during freezing. The myoglobin denatured percentage of the -3℃ freezing was higher than -20℃ freezing, the 15 days storage of -3℃ freezing was highest to 96%. The shear force value was not change during freezing, the myofibrillar fragmentation index during freezing was higher than the beginning of freezing, but was not change during freezing. The pH was decreased to freezing 45 days, after that increased.

살색정보와 움직임 정보를 이용한 영상분석

도경훈,정의윤,조정복 東西大學校 2000 동서논문집 Vol.6 No.-

Objects-based coding algorithms segment image contents into set of objects or regions according to a given model and estimate their parameters like motion, shape, and color. It is known that object-based coding is more efficient coding method in videophone image sequence. It is difficult to detect moving object only using motion information. Chromaticity distribution of skin color is similar region independent of human race. This paper presents efficient image analysis method using both skin color and motion. The proposed algorithm is composed of facial region detection using skin color and region detection using motion information.

레이저 스페클간섭법에 있어서 스페클크기와 측정 한계에 관한 연구

윤성운,김경석,양승필,정현철,김정호,이도윤 한국공작기계학회 1996 한국생산제조학회지 Vol.5 No.1

The high coherence of laser beam has made it possible to observe interference effects even in the light scattered from rough surfaces. That's why, when object with a scattering surface is illuminated with laser light, we do see a speckled appearance due to random interference. This sort of unique property of laser speckle has brought into existence the new noncontacting techniques such as speckle metrology method of measuring deformation, displacement, and vibration etc of objects with high optical sensitivity. The measurable range of speckle metrology especially used to measure in-plane information, however, is limited by some factors, the so-called strain, rotation, tilt of surface and out of displacement perpendicular to the plane of analysis. This restrictions severly limits the measurable range of speckle metrology by causing the decorrelation of speckle patterns. It is the purpose of this paper to give a survey on the measurable limitation of speckle photography method that is one of speckle metrology. Namely we will discuss the mutual relationships and problems of each limitations adding the restriction of the largest and smallest displacement measurable with speckle methods.

악골 외상성 골 낭의 임상 및 병리조직학적 분석

윤정훈,김도경,안상건,김수관 大韓顎顔面成形再建外科學會 2003 Maxillofacial Plastic Reconstructive Surgery Vol.25 No.1

We reviewed a series of 22 traumatic bone cysts of the jaws experienced during the 21-year period between 1982 and 2002 at the Chosum University Dental Hospital. The study group consisted of 13 females (59.1%) and 9 males (40.9%). The patient's mean age was 25.2 years, with peak incidence occuring in the first and second decade. Most traumatic bone cyst was located in the posterior mandible. Radiographically, well-defined round radiolucent (9 cases) or scalloped appearance (8 cases) were the predominant type, whereas 2 cases were ill-defined. A provisional clinical diagnosis was varied, only 9 of which were correct. Histopathologically, all the biopsy specimen composed of loose fibrous connective tissue accompanied by inflammatory reaction (13 cases), giant cells (9 cases). In addition, calcifications (6 cases) and new bone formation (5 cases) in the cyst wall were also observed. Taken together, correlative analysis of histopathologic and clinico-radiographic features is essential for definitive diagnosis and management.

건선 병변부 및 병변주위부 피부의 Cytokines 유전자 발현

윤기성,김도원,정상립,김문규,김정철 경북대학교 병원 1997 경북대학교병원의학연구소논문집 Vol.1 No.1

It has been proposed that cytokines may be involved in mediating the characteristic pathological changes in psoriasis, including epidermal hyperplasia, compromised keratinocyte differentiation, and dermal and epidermal infiltration by polymorphonuclear leukocytes and mononuclear cells. The purpose of this study os to assess the pattern of cytokine gene expression in psoriatic skin lesion. To investigate the cytokine expression pattern, we examined the transcripts of cytokine genes using reverse transcription and polymerase chain reaction (RT-PCR) method with 13 cytokine-specific primers. The Results were as follow; 1. Only the TGF-β gene was expressed in the normal skin. 2. IL-1α, IL-1β, IL-8, and TGF-β were detected in both lesional and perilesional psoriatic skin. The lesions showed more prominent expression. 3. IL-10 and GM-CSF were weakly detectable in three lesional psoriatic skin respectively, and IL-2R in two lesional psoriatic skin. 4. IL-2,IL-4,IL-5,IL-6 TNF-α, IFN-γ were not detectable on both lesional and perilesional psoriatic skin. Therefore, distinct differences in the cytokines gene expression were noted between normal and psoriatic skin. The patterns of cytokines gene expression in perilesional skin were similiar to those of lesional psoriatic skin.

Type 304 스테인리스 강판의 Ni 함량 변화에 따른 굽힘 피로수명 예측에 관한 연구

유도열,이수찬,강정윤 대한금속재료학회 2004 대한금속·재료학회지 Vol.42 No.7

The prediction of bending fatigue life was carried out for Type 304 stainless steel sheets containing various nickel contents from 8.3 up to 12 wt.%. After the slopes of the elastic strain (Δε_(e)/2) and the plastic strain (Δε_(p)/2) lines were obtained by the tensile test and bending fatigue test data at room and cryogenic temperatures, the prediction equations for the bending fatigue life were made by using the method of universal slope. At the ranges above 10³ Cycles, the predicted equations showed higher bending fatigue life same as measured one with lowering the nickel contents in the range of 8.3-12 wt. %. But, at the ranges below 10³ Cycles, the predictions of low-cycle bending fatigue life varying the nickel contents were different from the measured ones. A limitation was encountered for the prediction of the bending fatigue life with using the tensile data. In order to increase the reliability of the prediction equations at the ranges below 10³ Cycles, it is necessary to take into account the behavior of the α'-martensite transformation during fatigue affecting the generation and propagation of fatigue cracks. (Received March 8, 2004)

Type 304 스테인리스 강판의 상온 및 저온 피로특성에 미치는 Ni 함량과 가공유기 마르텐사이트 변태의 영향

柳度烈,李守澯,李庸得,姜晶允 대한금속재료학회 2001 대한금속·재료학회지 Vol.39 No.12

Effects of Ni content(8.3∼12 wt.%) and deformation-induced martensitic transformation on the bending and zero to tension fatigue behavior of Type 304 stainless steel used for the membrane of LNG storage tank at room and cryogenic temperature were investigated. By lowering the Ni content, the bending fatigue life at room temperature was decreased at the high level of total strain amplitude. It would be attributed to the crack initiation at γ/α' interface and the low ductility with the increase of α' contents. However, at the low level of total strain amplitude, lowering the Ni content increased the bending fatigue life. It was due to the suppression of crack propagation by the α'-martensite transformation around crack tip and the increase of tensile strength. At cryogenic temperature, lowering the Ni content showed beneficial effect on the bending fatigue life due to the increase of slip deformation resistance. In the zero to tension fatigue test, lowering the Ni content showed better fatigue characteristics regardless of the temperature variation. In this case, the high tensile strength with the α'-martensite transformation mostly affects material's fatigue life.

磁鐵鑛에 Ge을 첨가한 多結晶 ??의 결정구조

金政起,吳興度,全潤漢 金烏工科大學校 1983 論文集 Vol.4 No.-

The polycrystalline materials of ?? (χ=0.1, 0.2, 0.3 and 0.4) have been prepared by direct synthesis of the magnetites with germanium in order to study their crystallographic changes. X-ray studies at room temperature show that all the crystals are of single phase and its structures are cubic spinel. The calculated lattice constants of the samples from the Nelson-Riley function dependence of lattice constants of the samples increase from 8.3967 A TO 8.4014A with increasing Ge concentration and it obeys Vegard`s rule. The inter-ionic distance of the materials are computed with obtained constants of the samples.