• 한국추진공학회지
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• 제26권5호
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• pp.63-73
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• 2022

국내 설비를 활용하여 실기체급 비행체 모델에 대한 M4 준자유류 시험을 수행하였다. 시험장치 및 비행체 모델은 반복적인 전산유체해석을 통해 통합적으로 설계/제작되었고, 해당 설비를 목표 시험 조건까지 가동하여 시험장치의 M4 노즐이 완전히 팽창하는 것을 확인하였다. 비행체 모델의 흡입구 주변의 가시화 영상을 획득하여 경사충격파가 생성되면서 비행체의 흡입구가 시동하는 것을 관측하였다. 비행체의 가변노즐을 구동하여 배압을 조절하면서 비행체 내부 유로의 벽면 압력 분포를 획득하였고, 연소기 내 화염안정화장치에서 점화용 토치 점화 및 점화보조제의 연소 현상을 관측하였다.

• 항공우주시스템공학회지
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• 제2권3호
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• pp.33-39
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• 2008

VDL Mode 2 is one of air-to-ground VHF digital data link technologies. The VDL Mode 2 system is designed to be an air-to-ground subnetwork of the Aeronautical Telecommunication Network (ATN) using the AM(R)S band and it is organized according to the Open System Interconnection (OSI) model (defined by ISO). It can be used in ATS Applications especially for ATC communication such as CPDLC and ADS as well. And It is expected VDL Mode 2 replaces ACARS(Aircraft Communications Addressing and Reporting System) which has broadly been used for over 20 years. This paper presents the result of design of operational test equipments for the validation of VDL Mode 2 system under development in KARI.

• 한국유체기계학회 논문집
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• 제6권1호
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• pp.6-13
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• 2003

Variations of performance and NPSH of a turbo pump inducer were measured. The flows at the inlet and the outlet of the inducer were also experimentally investigated by measuring flow velocity and angle using a 3-hole Pilot tube. Performance and velocity profiles show a similarity for tested speeds, however not for efficiencies. Strong recirculating flows appears at the inlet of inducer even at the design condition. Cavitating flows were also visualized at several NPSH's.

• 한국콘크리트학회:학술대회논문집
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• 한국콘크리트학회 2002년도 가을 학술발표회 논문집
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• pp.561-566
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• 2002

Recently, high quality exposed concrete is needed to achieve high quality surface for outer wall of the building. In this study, to solve above characteristic of the exposed concrete we selected self compacting concrete(SCC) and compared with normal concrete. So, we developed the SCC mix design and performed the semi mock-up test. Through this result, we performed the pilot test and mock-up test to check surface of outer wall and to measure formwork pressure As a result because SCC is better than normal concrete with respect to flowability and seggregation resistance SCC is suit to a exposed concrete needed high quality surface for outer wall of the building.

• 디자인학연구
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• 제19권5호
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• pp.31-42
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• 2006

21세기를 사는 우리에게 디자인은 더 이상 산업적 부가 가치로서 생산과 소비를 활성화하는 행위가 아니라 보다 넓은 사회적 문화적 실천행위로 인식되고 있다. 본 연구의 목적은 문화생산의 주체적 발신자로서 디자인 역할의 확대와 디자인 그 자체가 문화로서의 자족성을 가져야 함을 주장하는 것이다. 연구문제는 문화산업의 중심에는 무엇보다도 디자인 행위가 있어야 할 것이라는 가정으로부터 출발한다. 연구의 범위는 거시적으로 문화산업과 디자인 정책에 대한 문헌연구 및 현황과 사례분석, 그리고 미시적으로 한국 미국 영국이라는 3개국 디자이너의 정책인식에 대한 비교조사 및 분석으로 진행하였다. 조사의 방법은 한국 미국 영국에서 양적연구(quantitative research)로서 설문조사를 실시하였으며, 디자인 정책의 과거 사실뿐만 아니라 현재의 현상에 대해서도 설명하고자 질적연구(qualitative research)로서 심층면접(intensive interview)을 병행하였다. 설문조사는 3개국의 디자인 전문가를 대상으로 비교하였으며, 심층면접은 한국에서 의사결정권을 가진 관리자급의 디자인 전문가 및 정책담당자들을 대상으로 하였다. 조사를 위한 설문지가 적절하게 설계되었는지를 알아보기 위해, 3차에 걸친 예비조사(pilot study)와 사전검사(pre-test)를 실시하였다. 연구문제 검증에서도 확인하였듯이, 한국이 20세기의 꽃으로 등장했던 문화산업 등에서 도구적 이성의 견제 없는 질주가 여전히 역사성을 넘어서지 못하고 현재성을 지니게 된다면, 우리는 정신의 시대에 진입하지 못하고 낙후된 주변국이 될 수밖에 없을 것이다. 21세기 문화산업에서 우리가 판단하게 될 디자인의 가치는 계몽의 원리에 대한 '역사성'과 '현재성'의 변증법에 달려있는 것이며, 새로운 철학, 새로운 문명, 새로운 세계를 열어가는 것이다.

• 한국축산시설환경학회지
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• 제1권1호
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• pp.47-53
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• 1995

An efficient Treatment of animal wastewater is one of the hot issues for preventing the environmental pollution. It should be established the design parameter in order to purify the animal wastewater. A test is carried on in the pilot plant as a simplified activated sludge process. A vibration sieve separator is deviced to keep the pollution load constant by means of separation of solid matter. The BOD removal efficiency of the vibration sieve showed over 50%. As the test results, the BOD contents of the influent was in average of 3,000 mg/I and that of the effluent 85 mg/I. So, the BOD removal rate showed 97% in average. The SS-contents in the primary chamber was about 3,300 mg/I and that of effluent 92 mg/I. The SS removal efficiency showed 97%. The removal rate of total nitrogen and phosphore were in average of 82% respectively. Carrying out in winter season, it showed relatively good results; The design parameter approved in this test can be applied to the full-time farmers.

• 한국의류학회지
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• 제34권2호
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• pp.252-265
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• 2010

Most luxury fashion brands have a strong brand identity and the product design characteristics of a brand are critical factors that influence brand identity. The design of products influence brand identity and play an important role in the choice by consumers in which brand to purchase. This study investigates the impact design characteristics of luxury brands on brand attitudes as well as purchase intentions in the examination of the differences in the impact influence by product category and consumer characteristics. The product design of brands was evaluated and measured by innovative and traditional characteristics. The product categories were divided into apparel, bags, shoes, and accessories. The consumer characteristics used in this study are fashion involvement, age, income, and the amount of money used for purchasing fashion products. Sample brands, Louis Vuitton, Chanel, Hermes, Burberry, and Gucci, were extracted from the Intel-brand's Luxury Brand Ranking 2008 and pilot tested for appropriateness. The data collected from 120 luxury consumers and 92 samples were statistically analyzed with SPSS 15.0, reliability test, factor analysis, ANOVA, frequency test, regression, and t-test. The findings are as follow. First, luxury brands were divided into two groups by innovative design characteristics and traditional design characteristics; innovative design characteristics show a significant influence on brand attitude and purchase intention. Second, only fashion related behavior factors among consumer characteristics became moderators when design characteristics influenced brand attitude and purchase intention. Third, the differences in purchase intention affected by design characteristics were found in bags, shoes, and accessories category. It is necessary for luxury brands to focus on innovative design characteristics and to specify the different needs of consumers through fashion related behavioral factors. This research will be useful to luxury brands in designing products and planning marketing strategies by offering specific information for luxury brand consumers.

• 공학교육연구
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• 제24권6호
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• pp.30-39
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• 2021

The present study aims to demonstrate that it is possible to objectively evaluate the competency (referred to as graduate attributes or program outcomes) of graduates of engineering education programs. To strengthen the link between engineering education accreditation and the qualification/certification system of engineering professionals, referred to as K-Engineering Professional (K-EP), individually assuring the quality of accredited graduates using multiple-choice test as main assessment tool is proposed. Test questions related to the basic vocational skills of NCS are developed for seven of the 10 program outcomes of the ABEEK KEC2015. The three program outcomes, PO1, PO3, and PO5, which need to fully accommodate the characteristics of each disciplinary field, are excluded. A pilot test involving graduates of eight accredited programs is conducted. Applying on Rasch model based on Item Response Theory (IRT), the item difficulty, fit and discrimination of multiple choice test are demonstrated. The pilot study strongly suggests that individual competency evaluation is possible at a certain level for seven program outcomes tested. For PO1, PO3, and PO5, however, questions that address the characteristics of each disciplinary field need to be devised. If a suitable pool of questions is built, it can be used as a program outcomes assessment tool by the accredited programs.

• 디자인학연구
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• 제16권2호
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• pp.121-130
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• 2003

확산적 표현력은 사고나 사상, 개념 등을 여러 개의 다른 의미를 지닌 상징으로 전환하여 표현해 내는 능력으로 Torrance의 창의력 검사영역(fluency, flexibility, originality) 중 융통성에 해당되는 표현의 넓이를 의미한다. 본 연구는 확산적 표현 능력을 향상시키기 위한 학습 프로그램을 개발하고, 디자인을 전공하는 학습자를 대상으로 훈련의 효과가 있는가를 연구하는 것이 목적이다. 훈련 프로그램은 Eskild Tjalve의 이론을 기초로 6개의 단계로 되어 있으며, 단계별 매개 변수는 element, function, number, arrange, form geometric, size이며 각 단계는 2주씩 훈련하도록 하여 총 12주로 구성하였다. 연구는 산업디자인과목 수강 대학생 저학년을 대상으로 하여 40명을 선정하고, 연구의 결과를 효과적으로 측정하기 위하여 실험집단과 통제집단으로 구성하여 훈련을 수행하였다. 학습자들의 학습결과를 객관적으로 평가를 위해 표준화된 창의력 검사지를 사용하였다. 연구결과에서 개발된 훈련 프로그램은 훈련 대상자인 실험집단이 비교대상인 통제집단보다 창의력 향상이 높게 나타났으며 훈련의 효과가 있음이 입증되었다.

• 한국콘크리트학회:학술대회논문집
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• 한국콘크리트학회 2004년도 추계 학술발표회 제16권2호
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• pp.25-28
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• 2004

Many highway bridges in Korea need seismic retrofit because only one decade has passed since the seismic design criteria was introduced. In this experimental study, the effectiveness of base isolation bearings was discussed for the seismic retrofit of the highway bridges. Four real scale RC pier specimens were constructed for the test. These RC piers didn't have seismic details. Except for one RC pier for the pilot test, three types of bearings such as Pot bearing, Rubber bearing (RB), Lead-rubber bearing (LRB) were applied to the other RC piers respectively. The RC pier with Pot bearing means current state of the prototype bridge that is not retrofitted seismically. And two RC piers with RB or LRB mean assumed states of the prototype bridge that are retrofitted seismically. To simulate dynamic behavior of these RC piers under earthquake loads, Pseudo-dynamic test method was used.