• 한국엔터테인먼트산업학회논문지
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• 제13권3호
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• pp.55-75
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• 2019

본 연구는 이론적 배경을 토대로 연예인들을 방송 장르와 배역 크기로 구분하여 이들의 직업의식 및 프로그램 의식을 분석하고자 진행되었다. 이를 위해 장르는 드라마와 예능 장르로 구분하고 배역 크기는 주연(또는 메인 MC), 조연(또는 보조 MC, 고정게스트), 단역(또는 일일게스트)으로 분류하였다. 장르와 배역 크기가 연예인들의 직업의식 및 프로그램 의식에 미치는 영향을 분석하고자 본 연구는 드라마 및 예능 프로그램에 출연 중인 연예인 100명을 대상으로 설문조사를 진행하였으며 추가로 심층 인터뷰를 함께 진행함으로서 연구결과의 타당성을 높였다. 연구 결과, 장르와 배역 크기는 연예인들의 직업의식과 프로그램 의식에 중요한 영향을 미치는 것으로 나타났다. 구체적으로, 직업의식의 경우에는 차별의식, 공동체의식, 소명의식, 만족도에서 유의미한 결과들이 도출되었으며, 프로그램 의식의 경우에는 애착심, 책임의식, 주인의식, 불안의식 등이 의미 있게 증가 또는 감소하는 것으로 나타났다. 본 연구는 이론적 측면에서 비교적 연구가 드물었던 연예인과 관련된 기존 연구를 확장했다는 점과 선행 연구에 근거하여 연예인들을 배역과 장르로 분류했다는 점에서 이론적 의의가 있다. 실무적 측면에서는 현 방송 환경 및 연예인들의 격차 해소의 필요성에 대한 함의를 제공하는데 기여하였다.

• Structural Engineering and Mechanics
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• 제19권2호
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• pp.173-184
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• 2005

For reducing construction cost, two-plate-girder bridges are getting popular in Japan. This type of bridge employs a PC slab, which is often cast-in-place. In such a case, concrete is not usually cast over the whole slab at one time: some portions are constructed earlier than the rest. Therefore, a construction joint is inevitably created. Due to the drying shrinkage of concrete, tension stress may occur in concrete slab. High tensile stress can be expected near the construction joint where concretes with different ages meet. Moreover, prestressing is not applied over the whole length of slab at one time. This may also serve as a source of tensile stress in the slab. Thus there is a chance that cast-in-place PC slab, especially near the construction joint, may be subjected to tensile cracking. In the present study, stress states near the construction joint in the cast-in-place PC slab of a two-plate-girder bridge are investigated numerically. The finite element method is employed and the three-dimensional analysis is conducted to see the influence of dry shrinkage and prestressing. The stress states in the PC slab thus obtained are discussed. The simplified model of a plate girder for this class of analysis is also proposed.

• 한국엔터테인먼트산업학회논문지
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• 제14권2호
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• pp.27-40
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• 2020

TV 프로그램의 인기 및 수출에 관해 연예인들이 상당한 기여를 하면서 이들에 대한 관심은 최근 더욱 증가하고 있다. 본 연구는 이런 흐름을 감안, 인터뷰 연구를 통해 연예인들의 관계 의식을 심도 있게 살펴봤다. 연예인의 의식 체계는 그들의 행위 및 태도에 다각도로 영향을 주기에 이 부분에 대한 연예인의 의식 고찰 연구는 매우 필요하다. 본 연구는 이를 위해 드라마와 예능으로 장르를 구분하고 주연, 조연, 단역으로 배역의 크기를 구분한 후 48명의 연예인을 대상으로 이들의 관계 의식을 탐색적으로 고찰, Nvivo 11 프로그램을 통해 해당 인터뷰 내용을 분석하였다. 연예인의 관계 의식을 확인하기 위해 그들과 방송 현장에서 가장 많은 시간을 공유하는 PD, 작가, 동료 연예인과의 관계를 중점적으로 고찰했다. 연구 결과, PD와 작가의 권한, 대우, 소통 의식에 관해 장르별, 배역 크기별 중요한 차이가 존재함을 확인할 수 있었으며 동료 연예인과의 관계에서는 선·후배의 관계, 그리고 경쟁의식, 소통 의식 등에서 예능과 드라마의 차이를 확인할 수 있었다. 본 연구는 연예인들의 관계 의식을 다양한 방면으로 고찰하고 새로운 실무적 시사점을 제안했지만 실제 연예인들이 어떻게 조화로운 관계 의식을 추구해야하는지에 대한 명확한 가이드라인을 제공하지 못 했다. 후속 연구에서는 좀 더 다양한 시사점을 도출할 수 있는 연구를 진행해야 할 것이다.

• Parasites, Hosts and Diseases
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• 제42권4호
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• pp.159-167
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• 2004

Sequences of the complete protein-coding portions of the mitochondrial (mt) genome were analysed for 6 species of cestodes (including hydatid tapeworms and the pork tapeworm) and 5 species of trematodes (blood flukes and liver- and lung-flukes). A near-complete sequence was also available for an additional trematode (the blood fluke Schistosoma malayensis). All of these parasites belong to a large flatworm taxon named the Neodermata. Considerable variation was found in the base composition of the protein-coding genes among these neodermatans. This variation was reflected in statistically-significant differences in numbers of each inferred amino acid between many pairs of species. Both convergence and divergence in nucleotide, and hence amino acid, composition was noted among groups within the Neodermata. Considerable variation in skew (unequal representation of complementary bases on the same strand) was found among the species studied. A pattern is thus emerging of diversity in the mt genome in neodermatans that may cast light on evolution of mt genomes generally.

• 한국지리정보학회지
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• 제9권1호
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• pp.127-136
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• 2006

수치지형모형을 시각적으로 분석하는데 있어 음영기복을 사용하고 있지만 지형의 음영 표현만을 생각하는 경우가 있어 정확한 그림자 범위를 확인하지 않고 있다. 본 연구는 GIS의 지형 표현에 사용되는 음영기복 기능을 렌더링과 비교하여 지형의 그림자 특성을 파악함으로써 각각 나타나는 수치지형모형상의 표현 차이를 분석하였다. 도로가 있는 지형으로 실험 대상지역을 선정하여 불규칙삼각망의 수치지형모형을 생성한 후 09시와 15시의 시간대별 태양의 방위각 및 고도에 따른 음영기복과 렌더링 기법을 적용하였다. 그 결과 음영기복은 태양의 광선을 받는 지형지물의 뒷부분만 어두운 상태로 나타났고, 렌더링을 통하여 투영된 그림자가 생성됨을 알 수 있었다. 이 상호 비교를 통해 음영기복을 이해할 수 있는 자료로 제시할 수 있으며, 렌더링 기법은 지형지물의 일조 분석 등에 효과적으로 사용될 수 있을 것으로 기대된다.

• 한국의류학회지
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• 제13권1호
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• pp.49-58
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• 1989

A clothing-erogonomics study was performed to investigate the difference of the upper arm skin skin surface and the relationship among the three aspects of upper arm (height of sleeve rap, sleeve width and armhole girth) by changing arm movements. Plaster cast was used for this experimental research. Arm movements consist of 9 types; just carmly standing on ($0^{\circ}$), and each 4 types ($45^{\circ},\;90^{\circ},\;135^{\circ},\;180^{\circ}$) to the vertical direction in front and in side. The results were as follows; 1) As the arm-movement angle increased, the height of sleeve cap decreased and that ratio was largest in the portion A-B3. 2) The steeve width was enlarged with the increment of movement angle in all portions of upper arm except B1-B5. 3) As increasing the movement angle, the whole armhole girth decreased and the ratio o(front armhole girth (F-A) was larger than that of back. 4) In the vertical direction in front, the height o( the sleeve caps was larger, the sleeve widths were smaller than in the vertical direction in side in all movement types, but there was no significant difference in arm-hole girth between the two cases. 5) There were significantly negative relationships between measurements in height of sleeve cap and those in sleeve width, and also between those in height of sleeve cap and in arm-hole girth. And significantly positive relationships were found between neasurements in height of sleeve cap and those in arm-hole girth.

• Journal of Mechanical Science and Technology
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• 제18권5호
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• pp.770-779
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• 2004

This paper describes the micro cutting of wear resistant tungsten carbides using PCD (Poly-Crystalline Diamond) cutting tools in performance with SEM (Scanning Electron Microscope) direct observation method. Turning experiments were also carried out on this alloy (V50) using a PCD cutting tool. One of the purposes of this study is to describe clearly the cutting mechanism of tungsten carbides and the behavior of WC particles in the deformation zone in orthogonal micro cutting. Other purposes are to achieve a systematic understanding of machining characteristics and the effects of machining parameters on cutting force, machined surface and tool wear rates by the outer turning of this alloy carried out using the PCD cutting tool during these various cutting conditions. A summary of the results are as follows: (1) From the SEM direct observation in cutting the tungsten carbide, WC particles are broken and come into contact with the tool edge directly. This causes tool wear in which portions scrape the tool in a strong manner. (2) There are two chip formation types. One is where the shear angle is comparatively small and the crack of the shear plane becomes wide. The other is a type where the shear angle is above 45 degrees and the crack of the shear plane does not widen. These differences are caused by the stress condition which gives rise to the friction at the shear plane. (3) The thrust cutting forces tend to increase more rapidly than the principal forces, as the depth of cut and the cutting speed are increased preferably in the orthogonal micro cutting. (4) The tool wear on the flank face was larger than that on the rake face in the orthogonal micro cutting. (5) Three components of cutting force in the conventional turning experiments were different in balance from ordinary cutting such as the cutting of steel or cast iron. Those expressed a large value of thrust force, principal force, and feed force. (6) From the viewpoint of high efficient cutting found within this research, a proper cutting speed was 15 m/min and a proper feed rate was 0.1 mm/rev. In this case, it was found that the tool life of a PCD tool was limited to a distance of approximately 230 m. (7) When the depth of cut was 0.1 mm, there was no influence of the feed rate on the feed force. The feed force tended to decrease, as the cutting distance was long, because the tool was worn and the tool edge retreated. (8) The main tool wear of a PCD tool in this research was due to the flank wear within the maximum value of $V_{max}$ being about 260 $\mu\textrm{m}$.

• 대한치과보철학회지
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• 제37권4호
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• pp.474-493
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• 1999

According to repeated measurements and correction procedures, the accuracy of the phase-shifting profilometry was developed. At first, after 20 final models for maxillary complete denture were duplicated , the mucosa sur-faces of models were measured with the phase-shifting proflometry and each mirror view of these was calibrated. Maxillary casts were divided into 4 groups of 5 casts per each, and wax dentures with 2 sheets of baseplate wax and artificial teeth were made and then cured according to the curing method of each group. Group I ; quick curing with QC-20 acrylic resin Group II ; 9 hour curing with QC-20 acrylic resin Group III ; SR-Ivocap system Group IV ; metal base and quick curing with QC-20 acrylic resin. After curing, polishing, and storing at $37^{\circ}C$ in saline for 30 days, the forms of the impression surface of the dentures were measured with the phase-shifting profilometry. Then, the impression surface form of each denture was placed in the optimal position of com-parison with the mirror view of the same final cast. The amount and direction of distortion of each denture was analyzed and the effects of polishing and storage in each denture were compared, The obtained results were as follows : 1. In Group I, the denture was observed as the appearance distorted in the opposite direction of the mucosa and the postero-lateral part of palatal portion of the denture was observed as the appearance separated from the mucosa. Also, the buccal flanges of the denture were observed as the appearance distorted in the direction of the mucosa. 2. In Group II, the postero-lateral part of palatal portion of the denture was observed as the appearance separated slightly from the mucosa. The bilateral buccal flanges of denture were observed as the appearance distorted severely in the direction of the mucosa. 3. In Group III the bilateral part of the residual ridge crest portions and the buccal flanges of the denture were observed as the appearance distorted in the direction of the mucosa, and specially, the buccal flanges of the maxillary tuberosities were distorted severely. 4. In Group IV, the acrylic resin base of the buccal portion of the denture was observed as the appearance distorted in the opposite direction of the mucosa. 5. The phase-shifting profilometry, done with repeated measurements and correction procedures, was effective in comparing the amount and direction of distortion at every position after the laboratory work and the delivery of maxillary complete denture.

• 대한치과보철학회지
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• 제41권3호
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• pp.288-299
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• 2003

Statement of problem: Many kinds of post and core systems are in the market, but there are no clear selection criteria for them. Purpose: The purpose of this study was to compare the flexural strength and modulus of elasticity of core materials, and measure the bending strength of post systems made of a variety of materials. Material and Methods: The flexural strength and elastic modulus of thirteen kinds core buildup materials were measured on beams of specimens of $2.0{\times}2.0{\times}24{\pm}0.1mm$. Ten specimens per group were fabricated and loaded on an lnstron testing machine at a crosshead speed of 0.25mm/min. A test span of 20 mm was used. The failure loads were recorded and flexural strength calculated with the measured dimensions. The elastic modulus was calculated from the slopes of the linear portions of the stress-stram graphs. Also nine kinds commercially available prefabricated posts made of various materials with similar nominal diameters, approximately 1.25mm, were loaded in a three-point bend test until plastic deformation or failure occurred. Ten posts per group were tested and the obtained data were anaylzed with analysis of variance and compared with the Tukey multiple comparison tests. Results: Clearfil Photo Core and Luxacore had flexural strengths approaching amalgam, but its modulus of elasticity was only about 15% of that of amalgam. The strengths of the glass ionomer and resin modified glass ionomer were very low. The heat pressed glass ceramic core had a high elastic modulus but a relatively low flexural strength approximating that of the lower strength composite resin core materials. The stainless steel, zirconia and carbon fiber post exhibited high bending strengths. The glass fiber posts displayed strengths that were approximately half of the higher strength posts. Conclusion: When moderate amounts of coronal tooth structure are to be replaced by a post and core on an anterior tooth, a prefabricated post and high strength, high elastic modulus core may be suitable. CLINICAL IMPLICATIONS In this study several newly introduced post and core systems demonstrated satisfactory physical properties. However when the higher stress situation exists with only a minimal ferrule extension remaining a cast post and core or zirconia post and pressed core are desirable.