• Asia Marketing Journal
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• 제18권3호
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• pp.47-63
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• 2016

Rational choice theory holds that the alternative with largest expected utility in the choice set should always be chosen. However, it is often observed that an alternative with the largest expected utility is not always chosen while the choice task itself being avoided. Such a choice phenomenon cannot be explained by the traditional expected utility maximization principle. The current study posits shows that such a phenomenon can be attributed to the gap between the expected perceived gain (or loss) and the expected perceived value. This study mathematically analyses the relationship between the expectation of an alternative's gains or losses over the reference point and its expected value, when the perceived gains or losses follow continuous probability distributions. The proposed expected value (EV) function can explain the effects of loss aversion and uncertainty on the evaluation of an alternative based on the prospect theory value function. The proposed function reveals why the expected gain of an alternative should exceed some positive threshold in order for the alternative to be chosen. The model also explains why none of the two equally or similarly attractive options is chosen when they are presented together, but either of them is chosen when presented alone. The EV function and EG-EV curve can extract and visualize the core tenets of the prospect theory more clearly than the value function itself.

• 지식경영연구
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• 제14권2호
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• pp.49-69
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• 2013

In this study, we examined how the psychological safety influence expected image outcomes(image gain, image risk) and how expected image outcomes impact one's involvement in creative work. And, we examined the relationship between creative work involvement and job performance. We also investigated mediating role of expected image outcomes between psychological safety and creative work involvement. Survey data was collected from 271 employees working in a South Korea. The results of structural equation modeling using LISREL 8.50 indicate that psychological safety was positively related to expected image gain, but not significantly related to expected image risk. The result also expected image gain was positively related to creative work involvement, contrary to prediction of hypothesis 2-2, expected image risk was positively associated with creative work involvement. In addition, creative work involvement has positive effect on job performance. Finally, the relationship of expected image outcomes about psychological safety and creative work involvement was mediated by expected image gain partially. We extended the literature and contributed better understanding of the creativity research by answering calls for further research on involvement in creative work rather then the outcome of the creative process.

• 한국국방경영분석학회지
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• 제18권1호
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• pp.61-73
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• 1992

Up to the present, the operating time has been studied on only a single aircraft attacking a single target or multiple targets under enemy threats. This study is to determine optimal operating time and appropriate size of aircrafts attacking multiple targets. Measures of mission effectiveness is defined through derivation of the probability of the various events associated with operating. By using these measures, the expected benefit of operating and the expected cost of operating are generated as a function of time. To formulate operating time determination model, the expected gain of operating is defined as the difference between the expected benefit of operating and the expected cost of operating. The model can be used to determine optimal operating time which maximizes the expected gain of operating, and can be used as the basis for determining the appropriate size of aircrafts.

• 벤처창업연구
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• 제8권2호
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• pp.53-61
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• 2013

본 연구는 프로스펙트이론을 적용하여 납세순응 문제를 다루었다. 납세순응의 결과는 소득 신고에서 나타나므로 원천징수에 따라 추가 납부와 환급 상황에 있는 두 개의 기업과 하나의 창업기업을 대상으로 세무대리인의 소득 신고액을 실험 기법으로 조사하였다. 프로스펙트이론에서는 이득 영역에서는 위험 회피, 손실 영역에서는 위험 선호로 의사결정자의 가치함수가 달라지므로 추가 납부 상황의 기업은 손실 상황의 기업으로 보아 소득 신고액이 감소하고, 환급 상황의 기업은 이득 상황의 기업으로 보아 소득 신고액이 증가한다고 본다. 창업기업은 준거점이 zero이므로 손실 상황이 아니라고 볼 수 있으나 기업의 재무 상태는 초기 투자로 인해 손실 상황일 것이다. 따라서 창업기업은 손실 상황의 기업과 동일한 방향으로 소득 신고가 이루어질 것이라고 볼 수 있다. 이에 대한 가설을 검증한 결과 창업기업이 소득 신고액이 가장 낮고 그 다음이 손실 상황의 기업이고 이익 상황의 기업이 소득 신고액이 가장 많았다. 두 번째 납세순응행위에 영향을 미치는 또 하나의 중요한 요인은 세무조사 적발률이다. 세무조사 적발률을 높이면 납세순응이 커진다. 이에 대한 가설을 검증한 결과 손실 상황의 기업, 이익 상황의 기업은 세무조사 적발률이 높아지면 소득 신고액이 증가하였다. 그러나 창업기업에 대해서는 통계적으로 검증이 되지 못하였다. 세 번째 세무대리인의 납세자 옹호성향과 위험선호 성향이 강할수록 프레이밍 효과가 커질 것이라는 가설에 대한 검증 결과 세무 대리인의 납세자 옹호성향이 증가할수록 창업기업과 손실 상황의 기업의 소득 신고액은 감소하고 이익 상황의 기업의 소득 신고액은 증가하였고 통계적으로 지지를 받았다. 반면 세무대리인의 위험선호 성향이 증가할수록 창업기업과 손실 상황의 기업의 소득 신고액은 감소하고 통계적으로 지지를 받았으나 이익 상황의 기업에 대해서는 통계적 지지를 받지 못하였다. 본 연구는 원천징수율, 적발률과 가산세율 등이 납세 순응 행위나 태도에 미치는 영향을 조사함으로써 정부의 정책 결정, 기업의 세무대리인 선정, 세무대리인의 적정 소득 신고 등에 도움이 될 것이며, 창업기업에 대해서는 최초의 연구이므로 그 의미가 더 있다.

• 대한의용생체공학회:의공학회지
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• 제29권3호
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• pp.249-253
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• 2008

The indirect-contact ECG (IDC-ECG) was introduced by a prior study for daily non-intrusive measurements. To improve the signal quality and to extend the application area of IDC-ECG, close study of the frequency characteristics of the IDC-ECG is necessary. In this study, the frequency response of the active electrode for several sample clothes was measured under conditions of actual IDC-ECG measurement with human body. Higher gain in low frequency range than expected by prior study was observed. In addition to it, wide variation in gain according to the cloth type in the low frequency range was observed. Variation in gain caused by moisture variation in the clothes was also observed. This study shows that the parallel R-C connection is proper for electrode model and the resistive factor is influenced by moisture in the clothes. This study is the first that provides the frequency response of the electrode in the actual indirect-contact ECG measurement and it is expected that the results will be helpful to improve the indirect-contact ECG method.

• 한국산림과학회지
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• 제83권2호
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• pp.239-245
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• 1994

전국 4개소에 식재된 사시나무 25개 클론중 18개 클론의 평균치에 대하여 광의(廣義)의 수고유전력(樹高遺傳力)(반복력(反復力))을 구한 결과 $H^2_{CM}=0.883$로 상당히 높은 것으로 추정되었다. 이에 따라 18클론중에서 최우수 l클론(5%), 즉 백담 15호를 선발하는 경우 35.3%의 개량효과(1.02m의 실질적 수고개량)가 있으며, 최우수클론 2클론, 즉 백담(百潭) 15호(號)와 선녀(仙女) 4호(號)를 선발(選拔)하면(10%) 25.6%의 개량효과 (0.74m의 실질적 수고개량)를 얻을 수 있을 것이다. 또한 최종 선발수령(選拔樹齡)에 가면 수고유전력(樹高遺傳力)이 더욱 높아질 것으로 기대되며, 따라서 더욱 높은 개량효과를 얻을 수 있을 것으로 기대된다.

• 전기학회논문지
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• 제67권11호
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• pp.1471-1476
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• 2018

In this paper, a high-gain antenna for satellite communication is proposed. The proposed antenna consists of septum polarizer, circular waveguide, Hat-feed structure that has a high-gain and efficiency. Especially, it is smaller and lighter than the conventional satellite communication antennas by applying a hat-feed structure. The measured results show that received gain of proposed antenna is better than 29.9 dBi and transmitted gain of proposed antenna is better than 30.5 dBi. The co-polarized and cross-polarized radiation patterns comply with ITU-RR Ap.8 and ITU-R S.731-1 that are recommended by International Telecommunication Union. The designed high-gain antenna for satellite communication is expected to be used for OTM and airborne satellite systems.

• Journal of Power Electronics
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• 제16권3호
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• pp.1076-1086
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• 2016

PI controllers are one of the most widely used controllers in industrial control systems due to their simple algorithms and stability. The parameters K_p and K_i determine the performance of the system response. The response is expected to improve by increasing the gain of the PI controller. However, too large a gain will accelerate the speed response and cause vibrations, which is not what is expected. This paper proposes a way to suppress vibrations by detecting the vibration frequency and extracting the vibration signal as a compensation to the speed feedback. Additionally, in order to improve its disturbance rejection ability, a low-order disturbance observer is proposed. This paper also explains the operation principle of the proposed method by analyzing the transfer function and it describes the design of the controller parameters in detail. Simulation and experimental results are provided to verify the merits of the proposed method. These results also show the good performance of the proposed method. It has a rapid response and suppresses vibrations.

• ETRI Journal
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• 제40권1호
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• pp.26-38
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• 2018

To overcome considerable path loss in millimeter-wave propagation, high-gain directional beamforming is considered to be a key enabling technology for outdoor 5G mobile networks. Associated with beamforming, this paper investigates propagation power loss characteristics in two aspects. The first is beamwidth effects. Owing to the multipath receiving nature of mobile environments, it is expected that a narrower beamwidth antenna will capture fewer multipath signals, while increasing directivity gain. If we normalize the directivity gain, this narrow-beamwidth reception incurs an additional power loss compared to omnidirectional-antenna power reception. With measurement data collected in an urban area at 28 GHz and 38 GHz, we illustrate the amount of these additional propagation losses as a function of the half-power beamwidth. Secondly, we investigate power losses due to steering beam misalignment, as well as the measurement data. The results show that a small angle misalignment can cause a large power loss. Considering that most standard documents provide omnidirectional antenna path loss characteristics, these results are expected to contribute to mmWave mobile system designs.

• 대한원격탐사학회:학술대회논문집
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• 대한원격탐사학회 2004년도 Proceedings of ISRS 2004
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• pp.460-463
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• 2004

There is a trend to replace TWTA of SSPA in S-Band uplink application for satellite operation. KARI developed l20W full S-Band SSPA system in early 2004. This paper covers SSPA system design and its test results. Through tests, nominal gain of 57dB, gain stability of +/-1dB over frequency, and gain stability of +/-0.5dB over temperature were shown. IMD value of -16.5dBc, -19dBc were revealed in PI and P3 output operations. With meeting specifications, l20W SSPA is expected to be used in operational S-Band uplink application.