[필름 리뷰: The Unconscious beyond the Cut] 스카이 캐슬 2부-두번째 단상

이용석 계간 미술치료 2019 계간 미술치료 Vol.- No.14

제4차 APEC 정보통신 장관회의를 다녀와서

이용석,Lee, Yong-Seok 한국정보통신집흥협회 2000 정보화사회 Vol.140 No.-

정상인에서 Nalbuphine HCI 과 Morphine 정주가 이산화탄소반응곡선에 미치는 영향

이용석,함병문 대한마취과학회 1990 Korean Journal of Anesthesiology Vol.23 No.4

To compare the respiratory depressant effect of nalbuphine and morphine, six healthy male volunteers (mean age 26 yr) were given the nalbuphine at a dose of 0.15 mg/kg and morphine at a dose of 0.1 mg/kg intravenously, at intervals of 2 weeks in a double-blind laboratory study. Respiratory depression was monitored by ventilatory responses during CO₂ rebreathing at 1 min, 30 min, 60 min and 90 min after injection. The displacement (mean intercept at P_(et)_(co2) 60 mmHg) and the slope of the linear relationship between minute ventilation with P_(et)_(co2) were measured, There were no significant differences in the slope and the displacement of CO₂ response curve between nalbuphine group and morphine group. Also, no significant differences in the slope and the displacement among 1 min, 30 min, 60 min and 90 min after injection of nalbuphine and morphine were noted. These findings demonstrate that the respiratory depressant effect of nalbuphine in similar to morphine at equianalgesic dose, and occurs within 10 min, and coinues more than 90 min.

FR-4 PCB에 구현한 저가형 24 GHz 레이다 시스템

이용석,신민건,김준성,박재현,정진우,김병성 한국전자파학회 2019 한국전자파학회논문지 Vol.30 No.10

In this study, a 24-GHz frequency modulated continuous wave(FMCW) radar system was designed on an FR-4 board to demonstrate the feasibility of low-cost radar systems. As the FR-4 substrate has a large substrate loss, its thickness was carefully determined considering line loss and radiation efficiency. Additionally, to operate the radar chip in the industrial scientific and medical(ISM) band without using a phase locked loop(PLL), we superposed and used the triangular wave signal of the DAC and proportional to absolute temperature (PTAT) voltages as a VCO tuning voltage. The designed radar has an operating frequency range of 24.02~24.25 GHz, output power of 4 dBm, a total receiver voltage gain of 66 dB, and an antenna gain of 9 dBi. The RF and MCU boards both use FR-4, and the size of the radar module is 4 cm×4.5 cm.

드론용 W-대역 레이다 고도계

이용석,이권학,김준성,박재현,김병성,송림 한국전자파학회 2019 한국전자파학회논문지 Vol.30 No.4

In this study, we propose a W-band frequency modulated continuous wave(FMCW) radar altimeter that can measure the altitude based on the frequency differences of transmitted and received signals. This W-band FMCW system is powered by an altitude control algorithm, which we propose to help prevent collisions of drones with obstacles in real deployment by measuring the relative altitude. It is shown that this algorithm enables the drone to be positioned within a 3 % error of altitude from the desired input height. The chip used in the W-band transmitter and receiver was fabricated using a 65-nm CMOS process, and a horn antenna was directly fed by incorporating an embedded waveguide feeder into the chip[1]. The clutter spectra observed in terrains including soil, grass, and calm lake water were measured and compared, confirming the reflectivity characteristics of various surfaces of different water contents.

호텔 직원이 지각한 권력이 조직몰입에 미치는 영향: 심리적 주인의식의 매개효과를 중심으로

이용석,이형룡 (사)한국관광레저학회 2018 관광레저연구 Vol.30 No.5

The purpose of this study is to investigate the effect of power on psychological ownership and organizational commitment of hotel employees. Total 350 copies were distributed to employees who worked in first-class hotels located in Seoul and 312 samples were used for the empirical analysis. Power was defined by five factors derived from exploratory factor analysis: reward power, coercive power, legitimate power, expert power and referent power. The results showed that reward power, referent power had a positive effect on psychological ownership and organizational commitment. Second, psychological ownership had a positive effect on organizational commitment. Finally, the mediating effects of psychological ownership on the relationship between power and organizational commitment are as follows: psychological ownership has a complete mediating effect on the relationship between reward power, referent power and organization commitment.

반원상 연골판 손상에서의 관절선 압통의 해석

이용석,정영복,최성우,황준성,김만경,이종석,서동현,Lee, Yong-Seuk,Jung, Young-Bok,Choi, Sung-Woo,Hwang, Joon-Sung,Kim, Man-Kyung,Lee, Jong-Suk,Suh, Dong-Hyun 대한정형외과스포츠의학회 2006 대한정형외과스포츠의학회지 Vol.5 No.2

목적: 슬관절 손상의 많은 빈도를 차지하고, 가장 흔하게 수술의 원인이 되는 반월상 연골판 손상을 외래에서 쉽게 일차적으로 검사하는 관절선 압통의 유용성을 알아보고자 하였다. 대상 및 방법: 2005년 5월에서 2006년 6월까지 군병원에서 동일한 시술자에게서 반월상 연골판 손상이 의심되어 수술을 시행한 76명의 환자를 대상으로 관절선 압통(joint line tenderness)에 대한 민감도, 특이도, 정확도, 양성 예측율, 음성 예측율 등을 분석하였다. 결과: 관절선 압통의 민감도, 특이도, 정확도, 양성 예측을, 음성 예측율은 순서대로 78.8%, 32.6%, 52.6%, 47.3%, 66.7%로 나타났으며 외측과 내측 및 불안정성을 동반한 환자를 대상으로 동일하게 분석하여도 상기 결과와 비슷하게 높지 않은 결과를 나타내었다. 결론: 관절선 압통 단일 검사는 외래에서 손쉽게 행해지는 간편한 검사이나, 그 단독 검사로서는 유용성이 떨어지는 것으로 보인다. 그러므로, 여러가지 이학적 검사를 병행 시행하는 것이 좀 더 높은 진단율을 나타낼 것으로 보이고, 필요시에는 자기공명영상(MRI)이나 진단적 관절경 검사도 필요할 것으로 보인다. Purpose: Meniscal injuries are very common sports problems and indications for knee surgery. We analyzed the effectiveness of joint line tenderness retrospectively. Materials and Methods: From May 2005 to June 2006, 76 knees which were diagnosed meniscal injury and performed arthroscopic surgery by same surgeon at military hospital were included. We analyzed sensitivity, specificity, accuracy, positive predictive value, and negative predictive value of joint line tenderness in meniscal diagnosis. Results: The joint line tenderness gave such results (78.8%, 32.6%, 52.6%, 47.3%, 66.7% for sensitivity, specificity, accuracy, positive predictive value, negative predictive value respectively). We got similar results in analyses with medial meniscal lesion, lateral meniscal lesion, and combined instability patients. Conclusion: The joint line tenderness is a easy and comfortable maneuver but, it's effectiveness is low when it is used lonely The composite examinations including MRI and diagnostic arthroscopy for meniscal injuries of the knee perform much better than joint line tenderness alone.

학술지 논문투고와 Endnote program 활용

이용석 대한운동사협회 2009 대한운동사협회 워크숍자료집 Vol.27 No.-

도플러 뇌혈류검사의 최신지견: 검사수기 및 파형 해석

이용석 대한임상신경생리학회 2001 Annals of Clinical Neurophysiology Vol.3 No.2

It is important to understand proper transducer positioning, anatomic landmarks, and appropriate scale settings. A standard TCD examination technique through temporal, orbital, suboccipital, and submandibular window is proposed in this review article. To shorten the time of examination, maximum power and large sample volume are recommended. It is crucial to perform a complete and through examination, although the examiner should target clinically involved arterial segment or suspected level of occlusion. Once the highest signal is found, avoid losing signal during switching the depth of insonation. Recent studies have reported diagnostic and prognostic value of TCD waveform in acute stroke. Thrombolysis In Brain Infarction(TIBI) flow grade classifies waveform as absent, minimal, blunted, dampened, stenotic, and normal. TIBI represents the residual blood flow, and is well correlated with recanalization and early stroke outcome. Definition of each flow grade is introduced in this article. Recently developed new TCD machine adopts power motion mode(M-mode) Doppler, which provides a vascular ?oad map?through the acoustic window. It came to be easier to perform the TCD examination. In the future, more compact and easier-to-use machine will be developed, and TCD is expected to be a true ?erebral stethoscope?

불성실공시와 정보비대칭

이용석,장석진,인창열 한국회계정보학회 2019 재무와회계정보저널 Vol.19 No.1

[연구목적] 본 연구는 불성실공시법인으로 지정된 기업의 정보비칭을 살펴본다. 이를 통해 국내에서 시행되는 불성실공시제도의 유용성에 한 실증 증거를 제 시하고자 한다. [연구방법] 불성실공시와 정보비칭 간의 련성을 분석하기 하여 불성실공시 법인 지정 여부와 함께 불성실공시 벌을 수집하여 분석한다. 즉, 불성실공시법인 지정과 당해벌 벌이 정보비칭의 용치인 일별스드의 평균 비기주식수익률의 표편차와 어떠한 련성을 보이는지를 회귀분석을 통하여 분석한다. [연구결과] 분석결과에 따르면 불성실공시법인으로 지정될수록 정보비칭이 심화 된다는 가설은 부분으로 지지되는 것으로 나타났다. 그러나 불성실공시법인에 부 과된 당해벌 벌은 정보비칭에 유의한 양(+)의 향을 미치는 것으로 조사되었다. [연구의 시사점] 본 연구는 자본시장 참여자들에게 불성실공시법인 지정여부뿐만 아니라 벌정보가 투자의사결정에 유용하다는 시사을 제공할 것이다. 한 본 연구의 결과는 감독기에게 자본시장의 정보비칭을 완화하기 하여 불성실공 시법인을 지속으로 리할 필요가 있음을 시사한다. [Purpose] This study examines the information asymmetry of a company designated as an insolvency disclosure corporation. This paper presents empirical evidence on the usefulness of the unfaithful disclosure system in Korea. [Methodology] In order to analyze the relationship between unfaithful disclosure and information asymmetry, we collect and analyze the unfair disbursement penalties together with the designation of unfaithful disclosure method. To summarize, regression analysis is used to examine how the designation of the unfaithful disclosure method, the penalties and cumulative penalties are related to the standard deviation of the average daily spread and the unexpected stock return, which is the substitute of information asymmetry. [Findings] According to the analysis results, the hypothesis that the information asymmetry increases as the corporation is designated as an insolvency disclosure corporation is partially supported. However, the penalties and cumulative penalties imposed on the insolvency disclosure corporation were found to have a significant (+) effect on information asymmetry [Implications] The results of empirical analysis of this study suggest that capital market participants do not simply evaluate negatively the designation of unfaithful disclosure law. It is judged that the decision is made differently according to the severity of the reason designated as the corporation.