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기본비행훈련장치(BATD)의 효율적 활용과 비행교육 효과 분석
장동관,권문진 한국항공운항학회 2022 한국항공운항학회지 Vol.30 No.3
A method to increase the effectiveness of flight training at a low cost by applying the correct flight training method to students without flight experience is a very important factor. BATD equipped with an extended display device enables the proper cross-check of external references and internal instruments by integrated flight instruction methods, enabling effective flight training in the initial stages. In addition, BATD employs the Cessna 172 model with Glass Cockpit to help make it easy to apply to actual flights. As a result of analyzing the effect of flight training through a survey of students who completed the BATD practice lecture, it was very helpful to understand the theories related to flight that they had already learned, and they responded that they could easily adapt to all flight subjects in additional FTD practice lectures. Therefore, a well-planned BATD practice lecture will be easy to adapt to real flight training, which will have significant effects in reducing time and cost.
장동관,송인암,황희중 한국유통과학회 2013 유통과학연구 Vol.11 No.10
Purpose-Appropriate response to the fast changing economic environment determines SMEs’ competiveness in the era of globalization and open market and, therefore, government policies to strengthen SME’s competitiveness will be very important in the future. It is time to investigate the element of strategic orientation that is necessary for strengthening the competitiveness of SMEs, and its effect on the success of a business start-up. This study analyzes the network orientation in addition to existing strategic orientation, and focuses on price and quality management capability as mediators for strategic orientation and outcomes of business start-ups. Research design/data/methodology -The orientations of technology-based business founders were classified into market, technology,network, and entrepreneurial orientation. We then investigated the effect of these orientations on product price and quality management capability, as well as the influence of price and quality management capability on the outcome of a business start-up. This study is based on the nation-wide survey of the founders and members of technology-based business establishments. The survey was administered to 300 selected companies via email for a period of one month, at the end of which 175 companies replied with valid answers. Further, for effective and objective research, we used SPSS 14.0 and Amos 7.0for structural equation modeling assumptions and hypothesis verification. Results-Except for entrepreneurial orientation, the other three orientations, namely, technology, market, and network orientations, affect the price management capability according to our results. The price management capability relates significantly with the sales and customer satisfaction. Especially, technology orientation is the core competency of start-ups that affects price and quality management capabilities. However, technology and entrepreneurial orientation do not influence the outcome of business start-ups, but affect their quality management capabilities. Conclusions-This study confirms that the strategic orientation affects product price as well as quality management capabilities, to introduce new products and achieve successful outcomes. In conclusion, new business founders face the dilemma of trade-off between price and quality in the planning stage of new product development. In particular, price management capability directly affects the outcome. Therefore, price management is more important for a successful start-up than quality management. Especially, during the initial stages of starting up a new business, price management capability entails following the market-leading company, or price penetration strategy. In this stage, price management is dependent on the information from outside rather than on the founder’s decision, and it directly affects sales performance and customer satisfaction. In contrast, quality management capability is directly related to the technology capability and market experience of founders. In this case, subjective and proactive decision making is required for differentiation and development of demand in the niche market, which does not directly influence the sales performance and customer satisfaction.
장동관(Dong-Gwan Jang),최순호(Sun-Ho Choi),황선묵(Sunl-Mook Hwang),허창수(Chang-Su Huh) 대한전기학회 2013 전기학회논문지 Vol.62 No.10
High power pulse generating technology is to accumulate the energy for relatively long and then to create a strong force by emitting the energy very fast. High power pulse generating technology has recently been using in various fields like environments, industry, research, military and so on. Numerous studies about high power pulse generators have already been performed and commercialized in various conditions. However, in aspect of their size and weight, it is hard to carry the generators which currently have been developed. For these reasons, din nations like America or Russia, the researches have been performed for Ferroelectric Generators(FEG), which have relatively simple structure and are economical. To realize the ferroelectric generator, in this study, we selected the PZTs which have different physical properties respectively, and then shocked them using explosives. The PZT samples with volumes of 0.31 ~ 0.94㎤ were depolarized by shocked and produced the waveform that have peak voltages of 4.28 ~ 15kV. The lowest relative permittivity sample generated much higher peak voltage. And sudden voltage drops which seem to be caused by dielectric breakdown were observed in some experiments using low young"s modulus samples. Also, increase in thickness led to increase in peak voltage, but the ratio of the voltage rise did not reach the ration of the thickness increase.