We report the discovery of a giant exoplanet in the microlensing event OGLE-2017-BLG-1049, with a planet―host star mass ratio of q = 9.53 ± 0.39 × 10-3 and a caustic crossing feature in Korea Microlensing Telescope Network (KMTNet) observations. The caustic crossing feature yields an angular Einstein radius of θE = 0.52 ± 0.11 mas. However, the microlens parallax is not measured because the time scale of the event, tE ≃ 29 days, is too short. Thus, we perform a Bayesian analysis to estimate physical quantities of the lens system. We find that the lens system has a star with mass Mh = 0.55+0.36 -0.29 M⊙ hosting a giant planet with Mp = 5.53+3.62 -2.87 MJup, at a distance of DL = 5.67+1.11 -1.52 kpc. The projected star{planet separation is aㅗ = 3.92+1.10 -1.32 au. This means that the planet is located beyond the snow line of the host. The relative lens{source proper motion is μrel ~ 7 mas yr-1, thus the lens and source will be separated from each other within 10 years. After this, it will be possible to measure the flux of the host star with 30 meter class telescopes and to determine its mass.

This paper proposes a fusion controller combing an anti-windup PID controller and BELBIC (Brain Emotional Learning Based Intelligent Controller) for controlling the position and vibration of a robot system having a single flexible manipulator. A finite element model of the flexible manipulator is developed. The reliability of it is verified by comparing the natural frequencies computed using the finite-element method with the experimentally measured ones. An MSC.ADAMS computational model of the robot system is interfaced with the proposed controller in MATLAB/Simulink, for carrying out a simulation. The simulation is performed with various references inputs and endpoint masses. The effectiveness and robustness of the proposed controller for control of the position and vibration of the flexible manipulator is shown through the simulation.

A numerical approach for ventilated disc brake with holes is carried out to investigate the effect of holes on the heat transfer characteristics. The numerical simulation code STAR-CCM+ is utilized to calculate flow and temperature fields with polyhedral meshes. The steady state results show that the holes make the flow velocity on the outer surface increasing, which induce the improvement of convective heat transfer on the outer surface. In the ventilated channel with holes, the convective heat transfer can be reduced due to the inflow of hot air through holes. In unsteady state, the disc has reached the highest temperature in 1,8s since the brake was engaged. The surface of disc without holes has maximum temperatures along the ventilated channels, while the surface temperatures of dis with holes are uniform.

본 연구는 해양배출폐기물의 해양환경공정시험기준 생태독성시험 관련 시료전처리방법 개선 및 폐기물 업종별 독성 판정기준 적합여부 파악을 목적으로 실시하였다. 해양성 발광박테리아 독성시험은 시료26점에 대하여 46%(12점)의 ‘독성 없음’ (상대발광저해율 30%이하 적용) 판정이 나왔으며, 저성성 단각류시험은 염수추출 전처리 시료7점 중 섬유오니 1점만 ‘독성 없 음’(상대평균생존율 30%이하 적용) 판정이 나왔다. 시험결과로 업종별 독성 크기를 살펴보면 발광박테리아시험 상대발광저해율 은 축산분뇨>식품제조>음식물폐수>섬유․염색>방지시설 순서로 독성이 나타나고, 저서성 단각류시험은 섬유오니 시료의 결과 가 독성이 낮게 나왔으나, 시험대상 시료수가 많지 않은 관계로 업종별 독성 크기 파악은 생략했다. 다만 동일 폐기물 시료7점에 대한 두 가지 독성시험 결과로 판단할 때 발광박테리아시험의 기준만족(독성 없음) 확률이 저서성 단각류시험에 비하여 높게 나 타날 것으로 판단된다.