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Implantation Rate Increased by Uterus Endometrial Injury in sDM Rat
Hoseung Kwak,Donghun Kang,Jihye Jang,Eunjoo Lee,Daeyoung Kim 한국수정란이식학회 2017 한국수정란이식학회 학술대회 Vol.2017 No.05
Embryo transfer is one of the important process of assisted reproductive technology (ART) and that is associated with uterus endometrial receptivity. Recently, mouse endometrial stimulation by artificial injury had shown the favorable effect on conception. In this experiment, we used uterus stimulation method that injury the endometrium to increase implantation rate for spontaneous Diabetes Mellitus (sDM) rat. Rats are divided into several groups involved a control group. We performed the surgical method to Experimental group bilaterally or unilaterally After that, we investigated morphological change and calculated implanted embryos respective sides of the uterus. The number of implanted embryo in the experimental group was significantly higher and there were lots of morphological changes including glands and endometrial cells that support implantation. Our results showed that rat uterus endometrial injury in ART help enhancing implantation rate.
Automotive Wire harness Virtual Validation for Voltage & Current Analysis and Circuit Protection
Hoseung An(안호승),Kyungwon Park(박경원) 한국자동차공학회 2012 한국자동차공학회 학술대회 및 전시회 Vol.2012 No.11
This paper is for virtual verification for automotive wire harness. The wire harness is one of typical power distribution components that are used to carry electrical power from the source to the remotely located loads. The wire system needs to perform in a safe manner when overload and short circuit conditions occur. The scope of simulation in this paper covers voltage & current analysis and circuit protection. GM Korea current procedure is to simulate the electric subsystem by Saber software and to confirm the CAE result by physical test. Also, i2t could be performed based on the real test result for single event. This process is helpful to produce higher reliable and robust design. General guideline is included for setting the boundary condition and component modeling.
Location-Based Saliency Maps from a Fully Connected Layer using Multi-Shapes
( Hoseung Kim ),( Seong-soo Han ),( Chang-sung Jeong ) 한국인터넷정보학회 2021 KSII Transactions on Internet and Information Syst Vol.15 No.1
Recently, with the development of technology, computer vision research based on the human visual system has been actively conducted. Saliency maps have been used to highlight areas that are visually interesting within the image, but they can suffer from low performance due to external factors, such as an indistinct background or light source. In this study, existing color, brightness, and contrast feature maps are subjected to multiple shape and orientation filters and then connected to a fully connected layer to determine pixel intensities within the image based on location-based weights. The proposed method demonstrates better performance in separating the background from the area of interest in terms of color and brightness in the presence of external elements and noise. Location-based weight normalization is also effective in removing pixels with high intensity that are outside of the image or in non-interest regions. Our proposed method also demonstrates that multi-filter normalization can be processed faster using parallel processing.
Hoseung Son(손호승),Jae-Hoon Ji(지재훈),Jong Han Jeong(정종한),Seong-Hoon Han(한성훈),Jung-Hyuk Koh(고중혁),Jong S. Park(박종승) 한국고분자학회 2020 폴리머 Vol.44 No.3
본 논문에서는 알킬기를 가지는 아연-프탈로시아닌(R-ZnPc)을 이용하여 단일벽 탄소나노튜브(single-walled carbon nanotube, SWCNT)의 분산 특성을 파악하고 이를 포함하는 폴리불화비닐리덴(polyvinylidene fluoride, PVDF)의 베타상(β-phase) 형성에 대한 연구 결과를 제시한다. R-ZnPc는 알킬기를 가지는 프탈로니트릴(phthalonitrile) 중간체를 아연염과 함께 tetramerization 반응을 진행하여 합성하였다. 긴 알킬기가 외부에 존재하기 때문에 R-ZnPc는 다양한 유기 용매에 높은 용해성을 발휘하였다. 또한 알킬기의 소수성 상호작용과 편평한 분자구조의 특징을 이용하여 SWCNT 외벽에 R-ZnPc 분자 wrapping을 유도하여 비공유 결합에 기반한 초분자 복합체(supra-molecular complex)를 제조하였다. Pc-CNT 복합체를 자외-가시광 흡수도, 퓨리에 적외선 분광법, 라만 분광법, 열중량 분석법, 주사전자현미경 측정 및 X선 광전자 분광법 등 다양한 측정 방법으로 분석하였다. 또한 Pc-CNT 복합체를 나노필러로 사용하여 Pc-CNT/PVDF 복합 필름(composite film)을 제조하였다. Pc-CNT/PVDF 복합 필름의 유전 상수는 큰 폭으로 증가하였으며 이는 PVDF의 베타상 형성이 촉진되었기 때문인 것으로 퓨리에 적외선 분광법과 X선 회절분석법 측정을 통해 확인하였다. 본 연구 결과는 R-ZnPc가 SWCNT 표면을 효과적으로 기능화할 수 있으며 제조된 Pc-CNT 복합체가 PVDF 매트릭스의 결정 구조 변화에 영향을 미쳤다는 것을 의미한다. 또한 본 연구에서 제시하는 방법은 하이브리드 복합 필름에 적합한 나노필러를 제조하는데 유용한 방법이 될 것으로 기대된다. We present the dispersion properties of alkylated zinc-phthalocyanine (R-ZnPc) for single-walled carbon nanotubes (SWCNTs), which finds useful for the β-phase formation of a polyvinylidene fluoride (PVDF) matrix. The R-ZnPc was prepared by direct tetramerization of alkylated phthalonitrile with zinc salts. Due to the presence of long peripheral alkyl-substituents, the prepared R-ZnPc exhibited controllable solubility in selected solvents. Taking advantage of the hydrophobic interactions of alkyl chains and flat structural features of Pc macrocycles, molecular wrapping of R-ZnPc around the SWCNTs was intended to produce noncovalent supramolecular complexes. The prepared Pc-CNT complexes were analyzed by various characterization methods, including UV-Vis, FTIR, Raman, TGA, SEM, and XPS measurements. Furthermore, the Pc-CNT/PVDF composite films were prepared using the Pc-CNT complex as effective nanofillers for the PVDF matrix. The dielectric constants of the Pc-CNT/PVDF composite films were significantly increased as a consequence of the promoted β-phase formation in the PVDF matrix, as evidenced by FTIR and XRD measurements. Current results suggested that the R-ZnPc functionalized SWCNTs have affected the crystalline structure of the PVDF matrix, which can be a useful tool for producing nano-fillers for hybrid polymer composites.
Implantation Rate increased by Uterus Endometrial Injury in Spontaneous Diabetes Mellitus Rat
Hoseung Kwak,Donghun Kang,Eunjoo Lee,Daeyoung Kim 한국동물생명공학회(구 한국동물번식학회) 2017 발생공학 국제심포지엄 및 학술대회 Vol.2017 No.10
Embryo transfer is one of the important process of assisted reproductive technology (ART) and that is associated with uterus endometrial receptivity. Recently, mouse endometrial stimulation by artificial injury had shown the favorable effect on conception. In this experiment, we used uterus stimulation method that injury the endometrium to increase implantation rate for spontaneous Diabetes Mellitus (sDM) rat. Rats are divided into several groups involved a control group. We performed the surgical method to experimental group bilaterally or unilaterally. After that, we investigated morphological change using immunohistochemical staining method and calculated implanted embryos respective sides of the uterus. The number of implanted embryo in the experimental group was significantly higher and there were lots of morphological changes including glands and endometrial cells that support implantation. Our results showed that sDM rat uterus endometrial injury in ART help enhancing implantation rate.