• 한국항공우주학회지
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• 제41권4호
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• pp.327-334
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• 2013

2012년 8월, 교육과학기술부와 KAIST 인공위성 센터 주최로 국내 최초의 캔위성 경연대회가 열렸다. 본 논문은 대학부 최우수 수상팀의 캔위성의 설계에 대한 것으로, 개념설계 단계에서 부터 대회 결과에 이르기까지의 전반적인 내용을 다룬다. 캔위성의 임무는 GPS 정보, 자세정보, 지상 이미지 정보를 송신하는 필수임무와 낙하하는 동안 태양이 떠 있는 방향으로 캔위성의 센서부를 지향하는 창의적인 임무로 구분된다. 센서부가 안정적으로 태양의 위치를 추적할 수 있도록 IMU와 Servo motor를 이용하여 자세제어를 수행하도록 설계하였다. 약 150m 상공에서 캔위성을 낙하시켜 임무 수행을 한 결과, 자세제어와 태양 위치 추적 기능이 성공적으로 수행되었음을 알 수 있었다.

• 한국의류학회지
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• 제25권1호
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• pp.71-82
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• 2001

In this study, Internet users were separated into 3 groups(clothing shoppers, clothing non-shoppers, non-shoppers). Shopping behavior of clothing shoppers(those who used the internet channel for clothing shopping) and the attitude to internet clothing shopping were examined. And characteristics of clothing shoppers were compared with characteristics of clothing non-shoppers(those who purchased goods except clothing on internet) and non-shoppers(those who purchased nothing on internet). The reason why clothing non-shoppers and non-shoppers didnt purchase clothing on internet was also investigated. Questionaire was used as method of gathering data. Mean, ANOVA, Duncan-test, t-test and $\chi$$^2$-test were used for data analysis. 1. Clothing shoppers considered carefully design, exchange & refund, quality and price and purchased generally T-shirt, underwear, jeans and sports wear. 2. Clothing shoppers thought clothing in internet shopping malls was not various in item, design, color, size and price. But they were satisfied with shopping convenience. 3. Clothing shoppers were more conscious of the shopping cost compared with clothing non-shoppers and non-shoppers Recreational shopping orientations and fashion leader orientations were low in both groups. Self-confidence in connection with clothing purchase were high in each groups, but that of clothing shoppers were relatively higher than clothing non-shoppers and non-shoppers. 4. The reason why clothing non-shoppers and non-shoppers didnt purchase clothing in internet shopping malls was that they wanted to buy after trying on clothing in a store, didnt believe the quality of clothing, didnt need to purchase clothing in internet shopping malls, and worried about exchange & refund.

• 제어로봇시스템학회논문지
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• 제13권6호
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• pp.603-608
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• 2007

In the conventional AOA(angle-of-arrival) positioning utilizing reverse-link wireless channel, each sensor should be equipped with an array antenna to measure the incident angle of signal transmitting from a tag. To perform the complicated signal processing for angle measurements, sensor size and its power consumption will be large. In some applications like mobile robot location, there exists no strict restriction in tag size or in power consumption. Rather, it is desirable that the sensor would be as small as possible. This paper presents a new AOA positioning method utilizing forward-link channel. Under the assumption that the mobile robot is operating on the flat surface, the measurement model for FLAOA(tiJrward-link AOA) is derived first. Two kinds of position estimation algorithms using FLAOA measurements are proposed; Gauss-Newton method and closed-fonn solution method. With the proposed methods, we can ohtain the attitude of robot as well as its position. Positioning performance of proposed methods is compared by computer simulation. Simulation results show that the closed-form solution method using FLAOA measurements is suitable for indoor robot positioning.

• 지역과문화
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• 제7권2호
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• pp.155-172
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• 2020

본 연구는 콘텐츠 내에서 소개되는 상품과 서비스에 대한 소비자 태도에 영향을 미치는 요인들을 분석하고, 요인별로 한국과 중국의 소비자 간 차이가 있는지를 탐구하였다. 소비자 태도에 영향을 미치는 요인에 대한 분석에서 독립변인으로 정보성, 신뢰성, BJ 매력성, 소비자혁신성을 설정하였다. 분석 방법으로 확인적 요인분석, 상관관계 분석과 위계적 회귀분석을 사용하였다. 분석 결과, 소비자혁신성, BJ 매력성, 신뢰성의 순서로 영향력이 큰 것으로 나타났으며 정보성의 영향은 통계적으로 유의하지 않았다. 대체로 소셜 미디어나 디지털 광고의 효과와 관련된 선행연구들과 일치하는 결과였다. 정보성의 영향은 관련 연구에서 소비자나 채널의 특성에 따라 유의하거나 유의하지 않은 경우가 엇갈리게 보고되고 있어 관련한 후속 연구가 필요하다. 요인별 한국과 중국 소비자의 차이는 독립표본 t-test 방법을 통해 검증하였다. 신뢰성, BJ 매력성, 태도 항목에서 중국 소비자들의 점수가 더 높았고 평균 차이는 유의하였다. 이는 체험형 1인 미디어콘텐츠가 연계되는 미디어커머스 환경의 차이에 기인한 것으로 판단할 수 있다. 정보성과 소비자혁신성의 차이는 유의미하지 않았다. 향후 연구대상의 범위를 확대 및 실험방식 도입을 통한 후속 연구를 기대한다.

• 한국우주과학회:학술대회논문집(한국우주과학회보)
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• 한국우주과학회 2004년도 한국우주과학회보 제13권2호
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• pp.372-375
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• 2004

The UV radiometer payload was launched successfully from the west coastal area of Korea Peninsula aboard KSR-III on 28, Nov 2002. KSR-III was the Korean third generation sounding rocket and was developed as intermediate step to larger space launch vehicle with liquid propulsion engine system. UV radiometer onboard KSR-III consists of UV and visible band optical phototubes to measure the direct solar attenuation during rocket ascending phase. For UV detection, 4 channel of sensors were installed in electronics payload section and each channel has 255, 290, 310nm center wavelengths, respectively. 450nm channel was used as reference for correction of the rocket attitude during the flight. Transmission characteristics of all channels were calibrated precisely prior to the flight test at the Optical Lab. in KARI (Korea Aerospace Research Institute). During a total of 231s flight time, the onboard data telemetered to the ground station in real time. The ozone column density was calculated by this telemetry raw data. From the calculated column density, the vertical ozone profile over Korea Peninsula was obtained with sensor calibration data. Our results had reasonable agreements compared with various observations such as ground Umkhr measurement at Yonsei site, ozonesonde at Pohang site, and satellite measurements of HALOE and POAM. The sensitivity analysis of retrieval algorithm for parameters was performed and it was provided that significant error sources of the retrieval algorithm.

• Journal of Astronomy and Space Sciences
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• 제17권2호
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• pp.277-284
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• 2000

KARI(Korea Aerospace Research Institute) has measured the ozone density profiles over the Korean Peninsular since the launch of the Korean Sounding Rocket-I (KSR-I) in 1993. The purpose of ozone measurements is to obtain the stratospheric and mesospheric vertical ozone density profiles over the Korean Peninsular with solar UV radiometers. With the visible channel of the radiometer, the attitude variation of the rocket was corrected and compensated. Developed system is based on ozone detector designs onboard the KSR-I and KSR-II. We discuss the development of ozone detector which will be onboard the KSR-III and its circuit and vibration test results for EM model.

• 산업융합연구
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• 제9권1호
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• pp.33-66
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• 2011

As an information-oriented society is arrived. an internet market has been developed steadily. This advance of internet market made the augmentation of purchasing clothes, and thus the fashion trade has tried to use effectively the internet marketing as a new channel of profit increasement. However, the fashion trade did not utilize efficiently an internet as a marketing mediation so far. This results from the want of coping with consumer behavior on the internet community. To answer the necessity of analysis of consumer behavior, this thesis inquires the difference of buying clothes on the internet shopping mall according to the lifestyle of consumer. Then this thesis provides the strategy of internet marketing fitted to each lifestyle for making a good profit. The inquiry was conducted to university located on Seoul, and the lifestyle of undergraduate was categorized to five groups, that is, trendy, information-inclined, economical purchase, brand-inclined, and spirit-pursuit types. This thesis analyzed the difference of consumer behavior of each type according to various factor, and presented a marketing strategy fitted to each type from these analysis results.

• Asia pacific journal of information systems
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• 제17권4호
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• pp.1-29
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• 2007

The brand-based online community recently plays an important roles for consumers to facilitates searching and sharing information among them. Firms often find such a brand community as a critical channel to gain collective intelligence for developing new ideas and products. As a new web platform such as web 2.0 has been introduced, consumers could more easily participate in the new social networks created by sharing mutual value and belief among themselves. Accordingly firms began to recognize potentials of online brand assets and pay attention to the importance of online brand community loyalty. Previous research related to online community tends to focus on identifying the antecedents of community loyalty and their subsequent impacts on brand. They, however, tend to neglect the importance of individual characteristics of online community users. As integrating the fragmented variables with an individual characteristics, therefore, this study reexamined the impacts of interactivity, information, reward, and personalization services provided by an online brand community on the sense of community, community loyalty, and brand attitude. Also, this study investigated how users' individual characteristics(need for cognition: NFC) can play moderating roles among the variables identified in the previous research. A field survey was administrated and 671 valid samples were collected. In order to test the hypothesis we conducted the multi-sample structural equation modeling(MSEM) between two groups(a group with high vs. a group with low level of NFC). Results show that previously identified variables such as interactivity, information, reward, and personalization services have significant effects on the sense of community as previous research demonstrated. Subsequently, the sense of community positively influences the community loyalty and brand attitude. However, when considering the NFC as a moderating variable, we found that the effect of interactivity and reward service on the sense of community was stronger for a group with a lower level of NFC compared to a group with a higher level, while the effect of information providing service on the sense of community was stronger for a group with a higher level of NFC compared to a group with a lower level. This research revealed that NFC can affect the degree of individual perception on the sense of community which has been considered as an important indicator for the community loyalty and brand attitude. Hence, when firms developing customer relation strategy through building an online brand community, they need to reflect customers' NFC and accordingly provide varying degree of interactivity, information, reward, and personalization services.

• 패션비즈니스
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• 제20권6호
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• pp.32-51
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• 2016

KakaoTalk has become a reputed mobile social network and an inseparable part of people's lives by leading the mobile industry in South Korea. However, there is a lack of studies in academia regarding perception of the consumers and assessment toward the mobile marketing and services by KakaoTalk. Based on the theoretical orientation of Elaboration Likelihood Model (ELM: Petty & Cacioppo, 1986) and electronic service quality (E-S-QUAL: Parasuraman, Zeithaml, & Malhotra, 2005), this study investigates the effects of information sources (Charles & Richard, 1988), and examines the consumer perception toward the service quality of KakaoTalk. A total of 209 responses were collected, using a self-administered survey in Seoul and Gyeonggi province, South Korea from March 2015 to June 2015. A seven-point Likert scale survey was developed to measure the information sources (i.e., argument quality, post popularity, and post attractiveness), electronic service quality (i.e., efficiency, fulfillment, privacy, and system availability), attitude (i.e., usefulness, preference, and overall attitude), and behavioral intention (i.e., like intention, share intention, and purchase intention). This study reveals a consensus that an online environment is different from the traditional retail context in terms of information source and service quality. Specifically, the results indicate that argument quality greatly impacts the attitudes of the individuals and their behavioral intention toward mobile shopping via social media channel. The most powerful factor among E-S-QUAL is "efficiency." This dimension of service quality influences the customer perception of usefulness and preference as well as share and like intention toward mobile shopping on KakaoTalk.

• 한국의류학회지
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• 제41권5호
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• pp.809-824
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• 2017

Interest in and use of social media as a communication channel are consistently evolving; in addition therefore, corporate social responsibility (CSR) activities have been often conducted on online channels such as social media due to the advantages offered by the rapid spread of information. Consumers can be persuaded differently and their cognition can be influenced depending on who delivers what message. This study examines the influence of information source characteristics on eWOM acceptance of CSR messages and attitudes toward a company. This study compares cases: when a company sends their CSR message versus when an individual (i.e., consumer's acquaintance) sends the company's CSR message. A total of 320 respondents were presented with online stimuli and responded to the questionnaire to identify this phenomenon. Vegan fashion (which refers to products made from raw materials without animal cruelty) was used as stimuli in this study because it is a representative example of CSR activities. As a result, when consumers are exposed to CSR messages online, perceived expertise, trustworthiness and attractiveness of information source affect consumer's electronic word-of-mouth (eWOM) acceptance and attitude toward a company. However, only trustworthiness influences eWOM acceptance in cases of a corporation information source. This study confirms the differences in eWOM acceptance and in attitudes to the company depending on to whom the messages were sent and with what content.