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동시증착법에 의해 성장된 붕화마그네슘 박막의 증착속도에 따른 효과
박성창,강성구,정대길,정준기,임영진,김찬중,김철진,Park, Sung-Chang,Kang, Seong-Gu,Jeong, Dae-Gil,Chung, Jun-Ki,Lim, Yeong-Jin,Kim, Chan-Joong,Kim, Cheol-Jin 한국초전도학회 2008 Progress in superconductivity Vol.10 No.1
Magnesium diboride ($MgB_2$) is an inexpensive and simple superconductor. This material was first synthesized and its structure confirmed in 1953 but its superconducting properties were not discovered until 2001 when they caused great excitement. In this study, superconducting $MgB_2$ thin films on the r-$Al_{2}O_3$ substrates have been grown by the combination of radio frequency magnetron sputtering of B and thermal evaporation of Mg. The deposition conditions were varied by changing deposition rate. Before the co-deposition of Mg and B, the deposition rates of each element have been measured separately. The $MgB_2$ layers had 400nm in thickness and superconducting transition temperatures have been measured around $\sim$38.6K. Superconducting properties have been measured by PPMS, XRD, and SEM.
충돌 회피가 보장된 분산화된 군집 UGV의 모델 예측 포메이션 제어
박성창,이승목,Park, Seong-Chang,Lee, Seung-Mok 대한임베디드공학회 2022 대한임베디드공학회논문지 Vol.17 No.2
This paper proposes a distributed model predictive formation control algorithm for a group of unmanned ground vehicles (UGVs) with guaranteeing collision avoidance between UGVs. Generally, the model predictive control based formation control has a disadvantage in that it takes a long time to compute control inputs when considering collision avoidance between UGVs. In this paper, in order to overcome this problem, the formation control algorithm is implemented in a distributed manner so that it could be individually controlled. Also, a collision-avoidance method considering real-time is proposed. The proposed formation control algorithm is implemented based on robot operating system (ROS), open source-based middleware. Through the various simulation tests, it is confirmed that the formation control of five UGVs is successfully performed while avoiding collisions between UGVs.
박성창 ( Seong Chang Park ),박승환 ( Seong Hwan Park ),이호준 ( Ho Jun Lee ),이경은 ( Kyung Eun Lee ),박동진 ( Dong Jin Park ),조영난 ( Young Nan Cho ),이성지 ( Sung Ji Lee ),서성례 ( Seong Rye Seo ),김태종 ( Tae Jong Kim ),이신석 대한류마티스학회 2010 대한류마티스학회지 Vol.17 No.2
Brucellosis is an endemic zoonotic disease, particularly in the Middle East and Mediterranean regions, and can involve many organs and tissues. Recently, the incidence of human brucellosis has increased rapidly in Korea. Brucellosis may often appear as other infections and asymptomatic conditions because of its range of clinical manifestations. Therefore, its diagnosis is frequently missed or delayed. Early diagnosis of brucellar spondylitis is important for reducing the number and intensity of complications. Therefore, it should be included in a differential diagnosis of back pain with an unknown origin. Brucellosis is normally transmitted to humans by direct contact with infected animals or by the ingestion of unpasteurized dairy products. We report an unusual case of brucellar spondylitis complicated by acupuncture.
쇼그렌 증후군에 동반된 1형 신세뇨관 산증 및 골연화증 1예
이호준 ( Ho Jun Lee ),이성지 ( Sung Ji Lee ),박성창 ( Seong Chang Park ),박동진 ( Dong Jin Park ),김태종 ( Tae Jong Kim ),이신석 ( Shin Seok Lee ),박용욱 ( Yong Wook Park ) 대한류마티스학회 2012 대한류마티스학회지 Vol.19 No.4
Sjogren`s syndrome is a chronic autoimmune disease characterized by decreased function of the lacrimal and salivary glands. In addition, many other organs can be involved in patients with Sjogren`s syndrome. Overt or latent renal tubular acidosis is an uncommon extraglandular manifestation in Sjogren`s syndrome, and osteomalacia is a rare complication of renal tubular acidosis. It has been rarely reported that osteomalacia is associated with distal renal tubular acidosis in patients with Sjogren`s syndrome. We report a case of a 34-year-old female patient who was initially presented with muscle weakness in both lower extremities. The patient was then diagnosed with Sjogren`s syndrome complicated by osteomalacia and renal tubular acidosis.