http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
열전소자를 이용한 고온용 로봇 그리퍼 냉각장치에 관한 연구
신기수(Gi-Su Shin),홍성덕(Sung-Duk Hong),김근수(Gun-Su Kim),권순재(Soon-Jae Kwon) 한국산업융합학회 2015 한국산업융합학회 논문집 Vol.18 No.1
In the research, we developed a device for cooling the drive section of the gripper of a robot for handling the high temperature material. In this study, By using a Peltier element, the high-temperature material is not affected and driving cylinder is cooled to prevent damage due to high temperatures. Hot part of the Peltier element is towards the robot gripper. Cool part of the Peltier element is towards the driving cylinder. The heat sink portion is made to keep the cooling effect. As the performance result, cooling-test is taken, and their result is satisfy.
이덕동,김재창,최동한,정석봉,전희권,지종기 한국화학공학회 1999 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.37 No.5
여러 금속 프탈로시아닌을 이용한 NO₂가스 센서가 진공도 2×10^5torr, 증착 온도 390℃에서 진공 증착법에 의해서 제조되었다. 여러 금속 프탈로시아닌 중에서 PbPc 박막이 5 ppm NO₂농도에서 80% 이상의 가장 좋은 감도를 나타냈으며, PbPc 박막 구조는 tri, mono-clinic이 혼합되어 있는 것으로 나타났다. 응답 및 회복 시간을 포함한 최적의 동작 조건과 NO₂가스의 연속적인 흡, 탈착 특성이 파악되었고, 수분을 포함한 여러 가지 산화, 환원성 가스에 대한 선택성을 비교 검토하였다. NO₂gas sensors using various metal phthalocyanines were prepared by vacuum sublimation method at 390℃ to test the electrical properties of the sensors in the presence of NO₂gas. Among the sensors prepared in the present study, a lead phthalocyanine(PbPc) thin film showed the best performance and its sensitivity was over 80% at 5 ppm of NO₂gas. The structure of PbPc thin film was a mixture of tri and mono-clinic crystal phases. Optimal operating conditions including response time, cyclic treatment of NO₂gas, and selectivity of various reduction and oxidation gases were developed and examined.
Jo, Sung Duk,Nam, Gi-Hoon,Kwak, Gijung,Yang, Yoosoo,Kwon, Ick Chan ELSEVIER SCIENCE BV AMSTERDAM 2017 Nano Today Vol. No.
<P><B>Abstract</B></P> <P>Although cancer immunotherapy, represented by chimeric antigen receptor (CAR) T-cell therapy and immune checkpoint-blockade therapies, has shown durable outcomes, the percentage of patients that respond to these approaches remains modest to date. However, encouraging recent advances suggest that nanotechnology has the potential to enhance the efficacy of such immunotherapies by improving the delivery, biodistribution, and release-kinetics of immunostimulatory small molecules and biologics in targeted tissues. A variety of synthetic nanoparticles, including polymeric nanoparticles, liposomes and inorganic nanoparticles, can be engineered according to their intended uses in cancer immunotherapy. Notably, nature-derived nanoparticles have emerged as a new class of immunotherapeutics. In this review, we describe state-of-the-art strategies for cancer immunotherapy using designed nanoparticles. We also highlight key translational challenges and opportunities in this rapidly growing field.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Review recent progress in nanotechnology with the potential to enhance the efficacy of cancer immunotherapies by improving delivery to specific target tissues. </LI> <LI> Discuss the characteristics and design parameters of nanoparticle delivery systems that should be considered to maximize efficacy of immunotherapies. </LI> <LI> Overview a variety of nanoparticle platforms, including polymeric and inorganic nanoparticles, liposomes, and nature-derived nanoparticles which can be engineered according to intended uses in cancer immunotherapy. </LI> <LI> Highlight translational challenges and opportunities in the field of nanoparticle-mediated cancer immunotherapy. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>
Detachable Coil Embolization for Saccular Posterior Inferior Cerebellar Artery Aneurysms
Jeon, Su-Gi,Kwon, Do-Hoon,Ahn, Jae-Sung,Kwun, Byung-Duk,Choi, Choong-Gon,Jin, Sung-Chul The Korean Neurosurgical Society 2009 Journal of Korean neurosurgical society Vol.46 No.3
Objective : Surgical treatment of posterior inferior cerebellar artery (PICA) aneurysms is challenging due to limited surgical accessibility. Endovascular approach has a benefit of avoiding direct injury to the brainstem or lower cranial nerves. Therefore, it has recently been considered an alternative or primary modality for PICA aneurysms. We retrospectively assessed outcomes following detachable coil embolization of saccular PICA aneurysms. Methods : From February 1997 to December 2007, we performed endovascular procedures to treat 15 patients with 15 PICA aneurysms. Fourteen patients with 14 PICA aneurysms morphology of which was saccular were reviewed retrospectively. Twelve patients had ruptured aneurysms. The aneurysms arose from the PICA origin site (n=12), the PICA lateral medullary segment (n=1), or the PICA tonsilomedullary segment (n=1). Results : Complete aneurysm occlusion was achieved in 10 patients, residual neck in 3, and residual sac in one. Radiological follow-up was performed in 7 patients with mean duration of 34.7 months (range, 1-97 months) and showed stable or complete occlusion in 6 patients. There were no rebleeding or retreatment after endovascular treatment. Thromboembolism was the only procedure-related complication (n=4 ; 28.6%). Asymptomatic PICA infarction occurred in two patients and symptomatic PICA infarction in two elderly patients with poor clinical grade. Of these procedural PICA infarction cases, 1 symptomatic PICA infarction patient developed ventriculitis and septic shock leading to death. The clinical outcome was good in 10 patients (71.4%). Conclusions : In the present study, detachable coil embolization has shown as an efficient modality for PICA saccular aneurysms challenging indications of microsurgery. However, thromboembolic complications should be considered, especially in poor clinical elderly patients with ruptured aneurysms.
Lee, Dongmok,Kwon, Gi Duk,Kim, Jung Ho,Moyen, Eric,Lee, Young Hee,Baik, Seunghyun,Pribat, Didier The Royal Society of Chemistry 2014 Nanoscale Vol.6 No.21
<P>We have studied the influence of the surface roughness of copper foils on the sheet resistance of graphene sheets grown by chemical vapor deposition. The surface roughness of the copper foils was reproducibly controlled by electropolishing. We have found that the graphene sheet resistance monotonically decreases as the surface roughness of the copper foils decreases. We show that a pre-annealing treatment combined with an optimized electropolishing process of the Cu foils and a fast CVD growth prevents the evolution of the Cu surface roughness during graphene synthesis. This combination of fabrication conditions produces small grain polycrystalline graphene films with a sheet resistance of 210 Ω □<SUP>−1</SUP>and carrier mobility values as high as 5450 cm<SUP>2</SUP>V<SUP>−1</SUP>s<SUP>−1</SUP>after transfer onto SiO2/Si.</P>