• 정보학연구
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• 제3권3호
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• pp.135-152
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• 2000

본 연구는 온라인에서 Flow 경험 변수(도전감/숙련)와 인지된 지각위험, 관여도 나아가 구매의도 변수간의 관계와 구조를 파악해 보려는 시도로 진행된 되었다. LISREL분석을 통한 분석결과는 소비자의 온라인 Flow 경험변수인 숙련도와 지각위험 간에는 부(-)의 관계를 나타냈으며, 숙련도와 관여도 간에는 정(+)의 관계를, 도전감과 관여도간의 관계는 정(+)의 관계를 보였다. 뿐만 아니라 지각위험과 관여도간의 관계는 부(-)의 관계를 나타냈으며, 지각위험과 구매의도, 관여도와 구매의도 간의 관계는 각각 부(-)와 정(+)의 관계로 나타났다. 이들 변수간의 관계와 구조를 파악한 것은 온라인소비자의 구매행동을 이해하고 전략적으로 대응하기 위한 마케팅활동에 매우 유용한 정보를 제공한다.

• 소성∙가공
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• 제13권5호
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• pp.422-428
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• 2004

At present, the design of extrusion dies and operation in extrusion companies are primarily based on trial and error. The experience of the die designer, the press operator and the die corrector determine the performance of the extrusion die and the efficiency of the process. In order to produce defect-free products of desirable quality in terms of strength, surface quality and geometrical dimensions, it is important to obtain more knowledge of the processes that occur during extrusion. Recently, to reduce the costs of designing and manufacturing of extrusion dies, and to ensure the quality of the extruded products, numerical simulation for extrusion processes such as FEM (finite element method) is applied increasingly and becomes a very important tool for the design and development of new products. However, most of the studies about FE simulation have been accomplished for simple geometry and low extrusion ratio in the filed of steady metal flow conditions. The extruded products of AI alloy in industrial practice involve complicated sectional geometry. This study was designed to reduce the time of die design and manufacturing in the extrusion process using FEM simulation. FEM simulations of extrusion process were performed in non-steady states conditions by changing weld plate included in extrusion die set. Product which was employed in this study is heat sink that has been used in the parts of heat exchanger of electric circuits. It is generally applied for aluminum or its alloys due to heat efficiency and easy production of complicated shapes, and manufactured by extrusion process. The simulated results showed that weld plate shape in extrusion dies influences meta] flow and dimensional accuracy of products.

• 한국정밀공학회지
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• 제11권4호
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• pp.77-87
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• 1994

This paper deals with an automated forming sequence design system by which designers can determine desirable operation sequences even if they have little experience in the design of cold forging process. The forming sequence design in the cold forging is very important and requires many kinds of technical and empirical knowledge. They system isproposed, which generates forming sequence plans for the multistage cold forging of axisymmtrical solid products. Since the process of metal forming can be considered as a transformation of geometry, treatment of the geometry of the product is a key in planning process. To recognize the geometry of the product section, section entity representation and primitive geometries were used. Section entity representation can be used for the calculation of maximum diameter, maximum height, and volume. Forming sequence for the part can be determined by means of primitive geometries such as cylinder, cone, convex, and concave. By utilizing this geometrical characteristics (diameter, height, and radius), the product geometry is expressed by a list of the priitive geometries. Accordingly the forming sequence design is formulated as the search problem which starts with a billet geometry and finishes with a given product one. Using the developed system, the sequence drawing with all dimensions, which includes the proper sequence of operations for the part, is generated under the environment of AutoCAD. Based on the results of forming sequence, process variables(strain, punch pressure, die inner pressure, and forming load) are determined.

• 한국콘텐츠학회논문지
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• 제15권10호
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• pp.517-534
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• 2015

본 연구에서는 유용성, 용이성, 쾌락성, 사회성 등 모바일서비스품질차원이 만족과 신뢰에 미치는 영향을 확인하고, 또한 만족, 신뢰, 몰입 등의 관계품질 구성개념과 이용의도 간에는 어떠한 인과관계를 형성하는가를 검증하였다. 이를 위해 모바일서비스 이용자를 대상으로 표본을 수집하였고, 수집된 자료는 SPSS 20.0 및 AMOS 16.00 통계패키지를 이용하여 제기된 연구가설을 검증하였다. 분석결과 첫째, 모바일서비스품질차원과 만족 관계에서 쾌락성을 제외하고 나머지 구성차원은 유의하였다. 둘째, 모바일서비스품질차원과 신뢰 관계에서 사회성만이 유의한 것으로 확인되었다. 셋째, 만족과 몰입 관계, 신뢰와 몰입 관계 및 몰입과 이용의도 관계는 유의한 반면, 만족과 신뢰 관계와 신뢰와 이용의도 관계는 유의하지 않았다. 따라서 모바일서비스기업의 마케터는 모바일서비스 이용자에게 우수한 모바일서비스를 제공함으로써 서비스에 대한 만족과 신뢰를 높이고, 또한 만족한 고객이 신뢰와 몰입을 유도함으로써 궁극적으로 이용의도를 높일 수 있도록 적합한 마케팅전략을 제시해야할 것이다.

• 국제물리치료학회지
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• 제10권4호
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• pp.1889-1896
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• 2019

Background: Because of the lack of accurate values for applied forces in manual therapy, manual therapists relies on the magnitude of the individual's perception during applying the force. However, excessive loading maneuvers carry risks for patients. Objective: To establish the relationship between the maximal force applied to swine skin with the specific region, sex, and baseline parameters of the subject. Design: Ex-vivo Study and laboratory Experimental research Methods: 3.5 kg of Korean pork sirloin that is a piece of swine was handled and it was set 3 dimensions; #A; #B; #C. Forty-seven participants who has no experience in physical therapy randomly carried out the experiment, indicated to push each place of the pressure spots with same posture and process under supervision from the instructor who has over 15 years of manual therapy, and we measured the pressure force in each time. Results: The biggest pressure force was recorded in spot #A, and #B was represented after #C. Pressure on #A showed certain statistic relation with height (r=.317, p<.05) and weight (r=.434, p<.01); pressure on #B showed certain relation which has statistical meaning with only height (r=.401, p<.01); pressure on #C emerged to have statistic relationship with height (r=.308, p<.05)and weight (r=.428, p<.01). The age aspect revealed relation with pressure on #A, #B and #C, but that was not statistically significant. Conclusions: It can be inferred that there is the most loss of pressure in the area where cartilage is like an island in the middle.

• 한국지리정보학회지
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• 제7권1호
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• pp.1-8
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• 2004

우리가 살아가고 있는 현실공간에서 사라진 과거의 지형공간을 복원한다는 것은 매우 의미가 있는 실험연구이다. 본 연구는 20여 년 전에 다목적 대형 댐의 건설로 대부분 물속으로 사라진 청풍호수 주변의 마을을 대상으로 원격탐사기법으로 3차원 지형을 복원하기 위한 연구이다. 수몰 이전의 비교적 해상도가 높은 인공위성 사진과 영상 및 지도를 이용하여 과거의 새로운 영상을 복원하는 실험을 실시하였다. 이로써 영상과 영상의 좌표변환, 영상과 지도와의 정밀기하보정, 과거지도와 참조지도 및 좌표변환을 통하여 DEM과의 중첩오차를 최소화시키고, 영상 복원 시에 손실정보를 최소화하는 최적채널 선정을 통하여 수몰이전을 가장 잘 보여주는 퓨젼영상을 복원할 수 있었다.

• Journal of Animal Science and Technology
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• 제63권5호
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• pp.1114-1125
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• 2021

Supplying a sufficient amount of high-quality colostrum is a prevailing challenge in Hanwoo calf production systems. This study aimed to describe the efficiency of a lacteal-derived colostrum replacer versus natural bovine colostrum (from Holstein) fed to Hanwoo calves. Forty newborn Hanwoo calves (25 males and 15 females; 30.7 ± 3.15 kg body weight [mean ± standard deviation]) were blocked by sex and birth weight and fed either natural colostrum or a commercial colostrum replacer. Calves displayed a narrow difference in the evolution of body weight and structural body dimensions when they received a commercial versus natural colostrum. Minor differences existed in the starter and total dry matter consumption between calves fed natural or commercial colostrum. Although the colostrum source had no significant effects on days to first diarrhea (average of 7.6 days; p = 0.17), the duration of diarrhea was longer in natural colostrum-fed calves (3.2 vs. 4.5 days; p = 0.04). Consumption of natural colostrum resulted in greater mean serum immunoglobulin G (IgG) on day 2 (14.7 vs. 10.8 ± 0.92 mg/mL) and day 7 (8.21 vs. 5.12 ± 0.82 mg/mL) of calf life, resulting in a greater proportion of commercial colostrum-fed calves (50% vs. 15%; day 2) to experience failure of passive transfer of immunity (serum IgG < cutoff point of 10 mg/mL). Overall, growth rate, body frame development, and incidence of diarrheal disease were not different in both groups. These results suggested that the colostrum replacer product tested in this study could be an alternative to natural colostrum derived from Holstein cow in securing calf growth and health in Hanwoo calf-rearing operations.

• 한국의류학회지
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• 제45권4호
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• pp.685-702
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• 2021

This study aims to discover how the perceived attributes of luxury fashion platforms affect consumer trust and satisfaction as well as online word-of-mouth intention. Based on a literature review, this study derived four dimensions of perceived attributes: brand assortment size, exclusivity, convenience, and personalization. The paper presents findings from an online survey targeting 359 consumers in their 20s to 30s who had recent experience with luxury fashion platforms. Based on the collected data, a structural model equation analysis was performed using AMOS 22.0 and SPSS 26.0. The findings illustrated that brand assortment size, exclusivity, and personalization had positive effects on consumers' platform trust. In addition, brand assortment size and convenience had a positive impact on satisfaction. Overall, the findings of the study illustrate that perceived attributes of luxury fashion platforms have a significant impact on consumers' platform trust and satisfaction and online word-of-mouth intentions. This study reveals that consumers' trend orientation moderates the effects of consumer attitude and behavioral intention. The academic practice of this study has laid the foundation for understanding mechanisms of marketing strategies by providing the characteristics of platforms in the luxury fashion industry.

• 기술혁신연구
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• 제29권4호
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• pp.31-57
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• 2021

본 연구에서는 개방형 혁신활동의 수준을 너비와 깊이라는 두 차원으로 나누어 이들이 혁신성과에 미치는 영향을 파악하고, 기술보호의 매개효과를 실증 분석하고자 한다. 이를 위해 한국기업혁신조사(KIS, 2018)에 응답한 기업 중 혁신성과를 도출한 경험을 보유한 제조업과 서비스업 기업 1,403개사를 대상으로 다중선형회귀분석, 위계적 회귀분석을 적용하였다. 분석 결과, 개방형 혁신활동의 너비는 급진적 혁신성과에 긍정적인(+) 영향을 미쳤으며 개방형 혁신활동의 깊이는 점진적 혁신성과에 긍정적인(+) 영향을 미쳤다. 기술보호의 매개효과를 검증한 결과, 혁신활동의 너비와 급진적 혁신활동 사이에는 부분매개를, 깊이와 급진적 혁신활동 사이에는 완전매개를 하는 것으로 나타났다. 본 연구의 결과는 개방형 혁신을 추진하는 기업과 그 중에서도 기술의 획득을 통해 제품혁신을 추진하는 기업에게 중요한 시사점을 제시하고 있다.

• 산업경영시스템학회지
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• 제41권4호
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• pp.42-49
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• 2018

Pilot Aptitude Research Equipment (PARE) is a simulator developed to measure or research pilot aptitude and train for student pilots. Design of an ergonomic PARE operation console is required to operate the equipment effectively. This study carried out five steps : (S1) operator questionnaire survey, (S2) anthropometric design formula development, (S3) usability evaluation, (S4) improvement design, and (S5) validation considering both Physical User Interface (PUI) and Graphic User Interface (GUI) of PARE operation console. The operator questionnaire surveyed needs for each PUI and GUI part of the console from two PARE actual operators. In terms of PUI, the anthropometric design formula was developed by using design variables, body dimensions, target population characteristics, and reference posture related to the PARE console. In terms of GUI, the usability evaluation was conducted by three usability testing experts with a 7-point scale (1 : very low, 4 : neutral, 7 : very high) on GUI of the PARE operation console by seven usability criteria. The improved PARE operation console was designed to reflect the optimal values of design variables calculated from design formula, the results from usability testing, and the operator's needs. The improvement effect was observed by 20 people who had experience with the PARE operation console. As a result of the validation, monitor visibility and cockpit visibility for the improved PUI design and visibility and efficiency for the improved GUI design were significantly increased by more than 90% respectively. The improved design of the PARE operation console in this study can contribute to enhance operation performance of the PARE.