Liquidity components in the Korean stock market: commonality in liquidity, underreaction, and equity returns

학위논문(석사) - 한국과학기술원 : 금융공학프로그램, 2023.2,[iii, 48 p. :]본 연구는 Amihud(2002) 비유동성 측도를 Ince(2022)의 방법론에 따라 (1)알파, (2)베타, (3)비체계적 유동성 측도로 분해하여 주식의 횡단면 관계를 분석하였다. 분석 결과는 다음과 같다. 투자자들은 높은 기대 비유동성을 나타내는 비유동성 알파에 대해 높은 기대 수익률을 요구한다. 또한 투자자들은 시장 전반의 비유동성에 높은 민감도를 나타내는 비유동성 베타를 가지는 주식에 대해서 높은 기대 수익률을 요구함을 확인하였다. 그러나 대형주의 비중이 증가하면 이러한 관계는 사라진다. 마지막으로 비체계적 유동성은 동월과 차월의 주식 수익률과 양의 횡단면 관계를 가진다. 또한 무비용 포트폴리오 전략에서 4개월간 투자자의 과소반응 행태를 확인하였다. 그러나 한국 주식시장에서의 투자자의 과소반응은 미국 주식시장과 다르게 투자자의 부주의가 과소반응 행태의 원인으로 작용하지 않는다.한국과학기술원 :금융공학프로그램

(A) Study On the Roll Eccentricity Estimation by Using an ALE

Maste

평판형 철강 시료 유전율 측정과 free space calibration 방법 [Invited Paper]

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Microwave ellipsometry를 이용한 평판형 시료의 유전율과 두께 측정법

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Resonant Modes of a Parallel-plate Waveguide and Radiated Coupling of IC Chips

DoctorThis dissertation proposes a method for using a parallel-plate waveguide to measure the permittivity and thickness of a dielectric plate, explores newly recognized higher-order modes in a parallel-plate waveguide, and presents methods to measure IC chip radiation.The dielectric constant of a dielectric plate with known length, width, and thickness was obtained by measuring the phase difference of the propagating wave in a PPW. A 750 MHz PPW cavity of which both ends are shorted was designed for measuring the thickness of scales formed on steel plates. This measurement method uses the change of the resonance frequency as a function of the thicknesses of the scales on the steel plates inserted at the open sides of the cavity. The dielectric constants were obtained with a 5% tolerance, and the thicknesses of the scales were measured at a 10 µm resolution. When the two plates of a PPW are infinite, transverse higher order modes do not occur, however, if the width is finite, the TEm0 modes that change m times in the transverse direction can be generated. It is found that the cut-off frequencies of the TEm0 modes are even lower than those of the TE1 mode, which are the lowest higher-order modes that change in the vertical direction. Therefore, the TEm0 modes must be considered when using PPWs. The TEm0 modes were evaluated assuming that the boundaries at both sides of the PPW are perfect magnetic conductorsthe existence of the modes was verified using a PPW cavity resonating at 1.48 GHz. The effect of the fringing field was analyzed by considering the width-to-height ratio of a PPW. The mechanisms by which the TEm0 modes are generated in PPWs and the effects of these modes are explained. An example is presented that demonstrates how to exploit these modes when designing an RFID tag antenna that operates in stacked steel plates. As the clock speed, power consumption, and circuit density of the high-speed digital circuits increase, the radiated emissions from the IC chips deteriorate the sensitivity of the antennas in mobile equipment. The equivalent current components of the IC chips mounted on a ground plane consist of one electric dipole moment orthogonal to the plane and two magnetic dipole moments tangential to the plane. These three dipole moments were obtained by measuring an IC chip using a TEM cell and a hybrid coupler. A new method to obtain the three dipole moments using a cube-shaped cavity was proposed and simulated. Approximate formulas to estimate the power transmission are proposed when an IC chip and a receiver antenna are in the near-field region. These formulas are expressed in terms of the dipole moments of the IC chip and the effective area of the receiver antenna. To validate these formulas, power transmission experiments were performed at a separation of 50 mm for the 900 MHz band

Parallel plate waveguide 의 TEm0 mode

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Design of a Two-inductor Loaded Small Loop Antenna using Genetic Algorithm (Invited Paper)

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