Earticle

Current physics-based simulation is an important tool in the fluid animation. However some problems require a new change to current research trends which depend only on the simulation. The ultimate goal of this project is to obtain information of flow example, analyze an example through machine learning and the novel fluid animation reconfigure without physical simulation.

본 논문에서는 자기 벡터 포텐셜 해석을 통해 3-코일 구조를 갖는 금속 검출기 헤드가 수신 코일에 미치는 유도 전압을 구하고, 금속 물체의 특성이 송신 코일의 임피던스에 미치는 영향을 유도하였다. 이러한 해석을 통하여 최적의 검출 성능을 위한 송신 코일과 수신 코일 간의 거리를 구하였고, 최대 유도 전압을 출력하는 금속의 위치를 유도하였다. 또한 기존의 수식과 비교하여 본 논문의 자기 벡터 포텐셜 해석에 대한 타당성을 입증하였다.

We derive an equation that predicts the induced voltage across the receiving terminals of the three-coil head of a metal detector using a magnetic vector potential approach. We also derive an equation that relates the change of the impedance of the transmitting coil to the properties of the metal. We utilize the results to obtain the optimum spacing between the driving and the receiving coils at which the maximum induced voltage is attained. Further, we determine the position of the metallic object where the voltage reaches its peak. We verify our work by comparing the results with those of a previous work.

In this paper, we will show that if there is a locally defined potential function of the Poincaré metric with constant gradient length, then the length is determined by the Gaussian curvature. In order to show, we will study a holomorphic Killing vector field generated by the potential and its geometry.

The fusogenic membrane glycoprotein (FMG) derived from the human endogenous retrovirus-W (HERV-W) exhibits fusogenic properties, making it a promising candidate for cancer gene therapy. When cells are transfected with HERV-W FMG, they can fuse with neighboring cells expressing the receptor, resulting in the formation of syncytia. These syncytia eventually undergo cell death within a few days. In addition, it has been observed that an HERV-W env mutant, which is truncated after amino acid 483, displays increased fusogenicity compared to the wild-type HERV-W env. In this study, we observed syncytium formation upon transfection of HeLa and TE671 human cancer cells with plasmids containing the HERV-W 483 gene. To explore the potential of a semi-replication-competent retroviral (s-RCR) vector encoding HERV-W 483 for FMG-mediated cancer gene therapy, we developed two replication-defective retroviral vectors: a gag-pol vector encoding HERV-W 483 (MoMLV-HERV-W 483) and an env vector encoding VSV-G (pCLXSN-VSV-G-EGFP). When MoMLV-HERV-W 483 and pCLXSN-VSV-G-EGFP were co-transfected into HEK293T cells to produce the s-RCR vector, gradual syncytium formation was observed. However, the titers of the s-RCR virus remained consistently low. To enhance gene transfer efficiency, we constructed an RCR vector encoding HERV-W 483 (MoMLV-10A1-HERV-W 483), which demonstrated replication ability in HEK293T cells. Infection of A549 and HT1080 human cancer cell lines with this RCR vector induced syncytium formation and subsequent cell death. Consequently, both the s-RCR vector and RCR encoding HERV-W 483 hold promise as valuable tools for cancer gene therapy.

This paper presents an analytical solution to predict magnetic field distribution of permanent magnet synchronous motor equipped with surface-mounted magnet by using transfer relations in terms of two-dimensional model in polar coordinates. The analytical results are validated by comparison with finite element analyses (FEA).

In performing the three-level SVPWM, it is nearly impossible to control the neutral-point potential exactly to the half of the dc-link voltage at all times. Therefore the inverter would produce an erroneous output voltage by this voltage unbalance. So the voltage unbalance has to be compensated in doing PWM, when the voltage unbalance occurs whether it is small or large, to make the inverter output voltage follow the reference voltage exactly the same. In this paper, a new compensating method for the neutral-point potential variation in a three-level inverter space vector PWM (SVPWM) is presented. By using the proposed method, the output voltage of the inverter can be made same as the reference voltage and thus the current and torque ripple of the inverter driven motor can be greatly improved even if the voltage unbalance is quite large. The proposed method is verified experimentally with a 3-level IGBT inverter.

본 연구는 주택 바우처 지원을 받는 반지하 거주 가구의 주거 상향 잠재적 이주 경로를 분석하였다. 단편적인이주의 출발·도착지 점 데이터 분석에서 확장하여 나아가 이주 경로를 방향과 거리를 가진 벡터를 분석 단위로 설정하고, 벡터 공간적 자기상관 기법을 활용하여 잠재적 이주 경로의 공간적 군집성을 실증하였다. 분석 결과, 반지하 가구의 주거 이동은 주택 바우처를 지원받더라도 높은 임대차 가격으로 인해 도심에서 외곽으로 밀려날 수밖에 없는, 비자발적 이주라는 구조적 문제를 확인하였다. 즉 이는 정책적 지원에도 불구하고 주거 취약계층의 공간적 선택권이제한되어 있음을 의미한다. 본 연구는 반지하 거주 가구의 잠재적 이주 경로 분석을 통해 주거 정책의 실효성을 평가하는 새로운 분석 프레임워크를 제시하였다는 점에서 의의가 있다.

This study analyzes the potential migration trajectories of semi-basement households receiving housing voucher support for upward housing mobility. Expanding upon simple point-based analysis focused on discrete origins and destinations, this study utilizes vector spatial autocorrelation to demonstrate the spatial clustering of migration trajectories using vectors comprising both distance and direction as the units of analysis. The analysis results confirm a structural issue of involuntary mobility among semi-basement households, who are forced from the city center to the outskirts due to the high rental prices even when they receive housing vouchers. This indicates that spatial choices for housing-vulnerable households remain restricted despite government support. By analyzing potential migration trajectories, this study contributes a novel analytical framework for evaluating the practical effectiveness of housing policies aimed at semi-basement households.