• 경영과정보연구
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• 제30권4호
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• pp.385-414
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• 2011

본 연구의 목적을 달성하기 위해 선행연구와 여러 가지 이론을 토대로 설정된 변수들을 연구 모형으로 설정하였다. 독립변수는 팬시민행동에 영향을 미칠 수 있는 개인적 차원과 상호작용적 차원의 요인 구분하였으며, 각 요인들이 팬시민행동이라는 매개변수를 거쳐 구단가치와 지역사회가치에 어떠한 영향을 미치는지 확인하고자 한다. 이에 대한 결과를 요약하면 다음과 같다. 팬 개인적 차원의 특성 중에는 경기력과 연고지가 팬시민행동에 정(+)의 영향을 미치는 것으로 나타났으며, 팬정체성과 선수매력도는 팬시민행동에 유의한 영향을 미치지 못하는 것으로 밝혀졌다. 한편, 팬 상호작용적 차원의 특성 중에는 팀관심동기와 집단주의가 팬시민행동에 정(+)의 영향을 미치며 친사회적가치동기 및 상호의존성은 유의한 영향을 미치지 못하는 것으로 나타났다. 팬시민행동과 결과변수와의 관계를 보면, 팬 시민행동의 경우 구단가치와 지역사회가치에 정(+)의 영향을 미치는 것을 알 수 있었다. 이는 스포츠 마케팅의 효과를 누리는 모든 주체들이 팬의 시민행동을 높일 수 있는 방법에 대체 관심을 가질 필요가 있다는 것이다. 구단의 경우 스포츠 마케팅 효과를 높이기 위해 팬 시민행동을 높일 수 있는 방법에 대한 고려가 필요하며, 이를 바탕으로 강력한 구단 자산을 구축하여 할 필요성이 있다.

• 한국엔터테인먼트산업학회논문지
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• 제14권2호
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• pp.1-14
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• 2020

본 연구는 싸이 이후 더 확대된 K-Pop 시장에서 BTS의 선호요인이 특징적으로 무엇인지를 밝혀보고자 하는 관심에서 시작되었다. 본 연구의 목적을 위해 국내를 비롯해 BTS가 인기를 끌고 있는 대만, 태국, 베트남을 대상으로 설문조사를 시행하였다. 본 연구의 결과를 살펴보면 BTS 선호요인 전체에 대해 베트남과 태국이 가장 긍정적인 인식을 하는 것으로 나타났고, 가장 높은 정(+)의 영향을 미치는 요인은 BTS의 차별적 감각으로 분석되었다. 본 연구가 동남아와 한국 팬들을 대상으로 하여 폭넓은 설문조사 대상자를 통한 확대된 연구이며, BTS 선호요인에 대한 새로운 시각에서의 규명이 가능했다는 의의에도 불구하고, 팬덤효과와 구매의도에 영향을 미칠 수 있는 다양한 변수를 고려하지 못하고, 세계적으로 더 많은 팬을 확보하고 있는 미국, 유럽 지역 팬들에 대한 의식조사를 함께하지 못한 점이 본 연구의 한계가 될 수 있을 것이다.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제2권6호
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• pp.299-311
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• 2008

The Radio Frequency IDentification (RFID) system is a contactless automatic identification system, which comprises readers and tags. In RFID systems, a reader collision occurs when there is interference in communication between one reader and the tags, due to the signals from other readers. The reader collision problem is considered as the fundamental problem affecting high density RFID reader installations. In this paper, we analyze the existing reader anti-collision algorithms. We also propose a pulse protocol-based reader anti-collision algorithm using slot occupied probability (SOP). The implementation of this improvement is simple, yet it effectively mitigates most reader collisions in dense reader mode, as shown in our simulation. That is, the proposed algorithm reduces the identification time, and increasesthe system throughput and system efficiency compared with the conventional reader anti-collision algorithms.

• Structural Engineering and Mechanics
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• 제19권2호
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• pp.123-139
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• 2005

An automatic modal identification program is developed for continuous extraction of modal parameters of three cable-supported bridges in Hong Kong which are instrumented with a long-term monitoring system. The program employs the Complex Modal Indication Function (CMIF) algorithm for identifying modal properties from continuous ambient vibration measurements in an on-line manner. By using the LabVIEW graphical programming language, the software realizes the algorithm in Virtual Instrument (VI) style. The applicability and implementation issues of the developed software are demonstrated by using one-year measurement data acquired from 67 channels of accelerometers permanently installed on the cable-stayed Ting Kau Bridge. With the continuously identified results, variability in modal vectors due to varying environmental conditions and measurement errors is observed. Such an observation is very helpful for selection of appropriate measured modal vectors for structural health monitoring use.

• 대한기계학회:학술대회논문집
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• 대한기계학회 2004년도 추계학술대회
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• pp.1377-1382
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• 2004

Flow fields in a half ducted propeller fan have been investigated by three-dimensional Reynolds-averaged Navier-Stokes (RANS) simulations and a vortex core identification technique. The simulation at the design operating condition shows that the tip vortex onset point is located at 30 percent tip chord of the suction surface on the blade tip. There is no interaction between the tip vortex and the adjacent blade, so that the tip vortex smoothly convects to the rotor exit. However, the high vorticity in the tip vortex causes the wake and the tip leakage flow to be twined around the tip vortex and to interact with the pressure surface of the adjacent blade. This flow behavior corresponds well with experimental results by Laser Doppler Velocimetry. On the contrary, the simulation at the low-flowrate operating condition shows that the tip vortex onset point is located at the 60 percent tip chord of the suction surface. In contrast to the design operating condition, the tip vortex grows almost tangential direction, and impinges directly on the pressure surface of the adjacent blade.

• 한국소음진동공학회:학술대회논문집
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• 한국소음진동공학회 2002년도 춘계학술대회논문집
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• pp.633-638
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• 2002

The vacuum cleaner that has no dust bag generates very high level annoying noise. The dominant noise source is the 2$\^$nd/ BPF tone of the rotating impeller. In order to reduce the noise, we identify the acoustic characteristics and reduce the noise of the vacuum cleaner and centrifugal fan. The resonance phenomenon is observed in blade passages and we found out that the resonance frequency is very close to the 2$\^$nd/ BPF. In order to reduce this high-level peak noise, new impeller is designed in this paper. The trailing edge of new impeller is inclined and this makes the flow interactions between the rotating impeller and the stationary diffuser vane occurs with some phase shift. The performance of new impeller is similar to the old one but the overall SPL is reduced about 3.6dBA. The SPL of BPF is reduced about 6dBA and 2$\^$nd/ BPF is reduced about 20dBA. The vacuum cleaner, which uses newly developed centrifugal fan, generate more comfortable noise than the old model and the strong tonal sound was dramatically reduced.

• ETRI Journal
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• 제30권5호
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• pp.653-662
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• 2008

Arbitration of tag collision is a significant issue for fast tag identification in RFID systems. A good tag anti-collision algorithm can reduce collisions and increase the efficiency of tag identification. EPCglobal Generation-2 (Gen2) for passive RFID systems uses probabilistic slotted ALOHA with a Q algorithm, which is a kind of dynamic framed slotted ALOHA (DFSA), as the tag anti-collision algorithm. In this paper, we analyze the performance of the Q algorithm used in Gen2, and analyze the methods for estimating the number of slots and tags for DFSA. To increase the efficiency of tag identification, we propose new tag anti-collision algorithms, namely, Chebyshev's inequality, fixed adjustable framed Q, adaptive adjustable framed Q, and hybrid Q. The simulation results show that all the proposed algorithms outperform the conventional Q algorithm used in Gen2. Of all the proposed algorithms, AAFQ provides the best performance in terms of identification time and collision ratio and maximizes throughput and system efficiency. However, there is a tradeoff of complexity and performance between the CHI and AAFQ algorithms.

• 한국콘텐츠학회논문지
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• 제7권10호
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• pp.262-273
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• 2007

본 연구의 목적은 여성 스포츠팬을 스포츠 마케팅의 세그먼트로 인정하고 마케팅을 펼치기 위한 초기과제로, 여성 스포츠팬의 스포츠 관람동기요인을 규명하고 동기요인 중 동일시수준에 따라 재관람의도와 구전의도에 영향을 주는 요인을 밝히는 것에 있다. 이러한 목적을 달성하기 위해 여성 스포츠팬을 대상으로 포커스그룹인터뷰를 실시한 후, 경기장을 찾은 여성관람객을 대상으로 표집이 이루어졌으며, 총 248명의 설문지를 분석에 사용하였다. 자료처리는 기술통계분석, 상관분석, 신뢰도분석, 확인적 요인분석, 회귀분석 등을 이용하였으며 본 연구에서 도출된 결과는 다음과 같다. 첫째, 여성 스포츠팬의 관람동기요인은 9개의 요인으로 나타났으며, 그 중 기술, 성취감, 드라마, 그리고 일상탈출요인이 여성 스포츠팬의 재관람의도에 긍정적인 영향을 미친다. 둘째, 여성 스포츠팬의 관람동기 요인 중 구전의도에 긍정적 영향을 미치는 요인은 선수기술, 성취감, 그리고 사회성요인이다. 셋째, 여성스포츠 팬의 관람동기요인 중 재관람의도에 영향을 미치는 요인은 동일시수준에 따라 차이가 있었다. 넷째, 여성 스포츠 팬의 관람동기요인 중 구전의도에 영향을 미치는 요인은 동일시수준에 따라 차이가 있었다.

• Smart Structures and Systems
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• 제20권2호
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• pp.127-137
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• 2017

Identification of damping characteristics is of significant importance for dynamic response analysis and condition assessment of structural systems. Damping is associated with the behavior of the energy dissipation mechanism. Identification of damping ratios based on the sensitivity of dynamic responses and the model updating technique is investigated with numerical and experimental investigations. The effectiveness and performance of using the sensitivity-based model updating method and vibration monitoring data for damping ratios identification are investigated. Numerical studies on a three-dimensional truss bridge model are conducted to verify the effectiveness of the proposed approach. Measurement noise effect and the initial finite element modelling errors are considered. The results demonstrate that the damping ratio identification with the proposed approach is not sensitive to the noise effect but could be affected significantly by the modelling errors. Experimental studies on a steel planar frame structure are conducted. The robustness and performance of the proposed damping identification approach are investigated with real measured vibration data. The results demonstrate that the proposed approach has a decent and reliable performance to identify the damping ratios.

• Nuclear Engineering and Technology
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• 제54권1호
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• pp.269-274
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• 2022

An artificial neural network (ANN) that identifies radionuclides from low-count gamma spectra of a NaI scintillator is proposed. The ANN was trained and tested using simulated spectra. 14 target nuclides were considered corresponding to the requisite radionuclide library of a radionuclide identification device mentioned in IEC 62327-2017. The network shows an average identification accuracy of 98.63% on the validation dataset, with the gross counts in each spectrum N_c = 100~10000 and the signal to noise ratio SNR = 0.05-1. Most of the false predictions come from nuclides with low branching ratio and/or similar decay energies. If the N_c>1000 and SNR>0.3, which is defined as the minimum identifiable condition, the averaged identification accuracy is 99.87%. Even when the source and the detector are covered with lead bricks and the response function of the detector thus varies, the ANN which was trained using non-shielding spectra still shows high accuracy as long as the minimum identifiable condition is satisfied. Among all the considered nuclides, only the identification accuracy of ²³⁵U is seriously affected by the shielding. Identification of other nuclides shows high accuracy even the shielding condition is changed, which indicates that the ANN has good generalization performance.