Multi-mode Kernel Weight-based Object Tracking

Eun-Sub Kim(김은섭),Yong-Goo Kim(김용구),Yoo-Joo Choi(최유주) 한국컴퓨터그래픽스학회 2015 컴퓨터그래픽스학회논문지 Vol.21 No.4

최근, 감시시스템, 게임, 영화 등 다양한 분야에서 영상을 이용한 실시간 객체 추적의 필요성이 높아짐에 따라, 커널기반 mean-shift 추적 기법에 대한 관심이 높아지고 있다. 커널 기반 mean-shift 객체 추적에 있어서 주요한 몇 가지 문제점들 중, 첫 번째로 추적 목표 객체에 대한 부분 가림 혹은 전체 가림 상황에서의 객체 추적의 문제를 들 수 있다. 본 논문에서는 멀티모드 지역적 커널 가중치를 적용함으로써 부분 가림 상황에서도 안정적으로 객체를 추적할 수 있는 실시간 mean-shift 추적 기법을 제안한다. 제안기법에서는 단일 커널을 사용하는 대신 여러 개의 서브 커널들로 구성된 커널을 사용하고, 각 서브 커널의 위치에 따른 지역적 커널 가중치를 적용한다. 기존의 멀티모드 커널 기반의 방법과 비교한 실험을 통하여 본 제안 방법이 보다 안정적으로 객체를 추적할 수 있음을 보였다. As the needs of real-time visual object tracking are increasing in various kinds of application fields such as surveillance, entertainment, etc., kernel-based mean-shift tracking has received more interests. One of major issues in kernel-based mean-shift tracking is to be robust under partial or full occlusion status. This paper presents a real-time mean-shift tracking which is robust in partial occlusion by applying multi-mode local kernel weight. In the proposed method, a kernel is divided into multiple sub-kernels and each sub-kernel has a kernel weight to be determined according to the location of the sub-kernel. The experimental results show that the proposed method is more stable than the previous methods with multi-mode kernels in partial occlusion circumstance.

Clinical Manifestations and Treatment Outcomes of Eosinophilic Gastroenteritis in Children

Jong Sub Choi,Shin Jie Choi,Kyung Jae Lee,Ahlee Kim,Jung Kyung Yoo,양혜란,문진수,장주영,고재성,강경훈 대한소아소화기영양학회 2015 Pediatric gastroenterology, hepatology & nutrition Vol.18 No.4

Purpose: The aim of the present study was to investigate the clinical features and outcome of eosinophilic gastro-enteritis (EGE) in children.Methods: Our study enrolled 24 children who were diagnosed with EGE from 1993 to 2014 at the Department of Pediatrics, Seoul National University Children’s Hospital. The patients’ clinical manifestations, treatments, and out-comes were reviewed from the medical records.Results: The mean age at diagnosis was 5.3 years. Most patients had gastrointestinal symptoms including diarrhea (54.2%) and abdominal pain (45.8%). Peripheral eosinophilia was present in 91.7% of the patients. Thirteen patients (54.2%) showed anemia, and 15 patients (62.5%) had hypoalbuminemia. EGE was classified as mucosal, sub-serosal, or muscular in 75.0%, 20.8%, and 4.2% of cases, respectively. Three patients showed gastroduodenal ulcers upon endoscopic analysis. A history of allergy was reported in 13 patients, including atopic dermatitis, allergic rhinitis, and asthma. Five patients (20.8%) improved with food restrictions. Among the 19 patients treated with steroids, 11 (57.9%) discontinued steroid treatment without subsequent relapse, 4 (21.1%) relapsed after ceasing steroid treat-ment, and 4 (21.1%) showed no response to steroids. Two patients who were resistant to steroids underwent ther-apeutic surgery. The presence of gastroduodenal ulcers was significantly associated with relapse and steroid resistance.Conclusion: A high suspicion of EGE is warranted when children have nonspecific gastrointestinal symptoms and peripheral eosinophilia. Most patients improved with food restrictions or steroid treatment, although one-third of pa-tients showed a relapse or steroid resistance.

규칙적인 걷기운동과 달리기운동이 베타엔돌핀, 프로락틴, 코티졸의 변화에 미치는 영향

김유섭,배철웅 한국스포츠리서치 2003 한국 스포츠 리서치 Vol.14 No.3

The purpose of this study is to investigate the effects of regular exercise in different modes on stress hormones responses in a control group(n=10), a walking group(n=10), and a jogging group(n=10). The two groups (walking, jogging) took walking and jogging exercise for 13 weeks. The untrained female students enrolled in K Junior College volunteered to participate in this study. Plasma β)-endorphin, prolactin, and cortisol levels of stress hormones were analyzed ; in a pretest, after 8 weeks, after 13 weeks, and immediately after the graded exercise test(GXT). The results obtained are as follows: Plasma β-endorphin levels during regular exercise treatments after GXT showed significant difference between walking and jogging. The level was increased significantly after 13 weeks in the walking group and 8 weeks in the jogging group. The level in the jogging group was increased more than in the walking group(p<0.05). Plasma prolactin and cortisol levels during regular exercise treatments after GXT did not show any statistically significant difference among the control, the walking, and the jogging group in the treatment period but showed some increase in the walking group and the jogging group.

Pheniprazine이 Bretylium 및 Guanethidine의 昇壓物質效果에 미치는 影響

史有燮 全南大醫大 1973 전남의대학술지 Vol.10 No.2

Daricon(Oxyphencyclimine)에 의한 DMPP 昇壓效果의 强化

史有燮 全南大醫大 1973 전남의대학술지 Vol.10 No.2

Purge & Trap-GC를 이용한 의약품 필름코팅 정제 중 잔류용제에 관한 연구

장준식,이명자,소유섭,문춘선,이주헌,박희라,김진숙,강경모,이선옥,방성연,유미자,유문균,금오성,이병욱 식품의약품안전청 2000 식품의약품안전청 연보 Vol.4 No.-

의약품은 약물을 생체에 적풋하기 위하여 유효성분의 효과가 언제나 일정하게 확보되고 사응에 편리하도록 만들어지는 것이므로 유효썽분 이외에 약효에 영향을 주지 않는 성분이 첨가되는 경운가 많다. 이 때 사용되는 용매들은 제피의 광택 및 건쪼시간의 단축 등을 위하여 휘발점이 낮을 용매들이 주로 사용되어진다. 본 연구는 의약품 필름코팅정제 중 잔류용매 4종(chlorofonr benzen, trichloro ethylen, 1,4-dioxane)에 대한 변형된 pirge & trap-GC 장치를 이용한 동시분석방법을 개발하였으며, 각 표준품의 RSD 값은 chloroform 3.03%, benzen 3.17%, trichloroethylen 3.69% and 1,4-dioxane 3.41%였다. 또한 시중 유통중인 의약품 50종에 대하여 잔류웅매 양을 측정하였으며, 검출되는 잔류용매는 한 건도 없었다. This study nras carried out to develope the analytical method for the mixture of chlorefonn, benzen, trichloroethylen and 1,4-dioxane simultaneously and determine the remainingorgauic solvents in coating tablets by Purge & Trap-GC. The results were as follouFs ; 1. Chloroform, benzen, trio:tloroethylen and 1,4-dioxane separated by tenax #5 trap by HP-624GC column by terrlperature programming. The peaks were separated completely at retentiontime of 6.88min for chloroform, 8.21min for benzen, 10.38miu for trichloroethylen and 11.95minfor 1,4-dioxane. 2. Standard RSD were individually chloroform 3.03%, benzen 3.17%, trichloroethylen 3.69%and 1,4-diorane 3.41%. 3. 60 samples were not detrcted chloroform, benzen, trichloroethylen and 1,4-dioxane.

A pre-dose biomarker Ccrn4l for predicting the susceptibility of cisplatin-induced hepatotoxicity

Da-Bin Hwang,Dong-Hoon Won,Yoo-Sub Shin,Shin-Young Kim,Changuk Kim,Jun-Won Yun 한국실험동물학회 2021 한국실험동물학회 학술발표대회 논문집 Vol.2021 No.7

Cisplatin-induced liver injury is one of the limitations of its use as an anti-cancer drug. In particular, individual differences in sensitivity to drug-induced liver injury (DILI) can lead to life-threatening situations. The purpose of this study is to discover which innate genetic factors determine diversity for susceptibility to DILI. Rats undergo a liver prebiopsy and a 3-week postoperative recovery period prior to cisplatin administration. Two days after administration of cisplatin, hepatotoxicity was confirmed through serum biochemical and histopathological analysis. Based on liver-related biochemical test results (ALT, AST, γGT), rats were sub-grouped into the Susceptible (top five) or Resistant (bottom five) group for RNA sequencing using the pre-collected liver samples. As a result, pre-dose 161 genes were differentially expressed between the susceptible and resistant groups. Among them, Ccrn4l, a clock-controlled gene included in the "rhythmic process", was inherently low in gene expression before drug administration in both cisplatin- and acetaminophen-susceptible animals. In addition, in the susceptible group, the innately low expression level of Ccrn4l was maintained even after cisplatin treatment with decreased antioxidants, increased nitration, and apoptosis. When checking the correlation between Ccrn4l, antioxidant catalase, and mitochondrial RNA in the liver, it was confirmed that they showed similar mRNA expression patterns according to individual circadian variation. Surprisingly, Ccrn4l knockdown WB-F344 cells prompted cisplatin-induced mitochondrial dysfunction, apoptosis, and decreased catalase activity. In conclusion, individual innate hepatic Ccrn4l level may be a novel factor affecting cisplatin-induced hepatotoxicity susceptibility by modulating mitochondrial and antioxidant functions.

대장직장암종에서 E-cadherin, α-catenin 및 β-catenin의 발현과 임상병리학적 인자와의 상관관계

김형중,이태진,박언섭,유재형 대한병리학회 2000 Journal of Pathology and Translational Medicine Vol.34 No.4

W₃₅Fe₄₃C₂₂비정질 합금분말의 결정화 거동

권영준 ( Young Jun Kwon ),유정선 ( Jung Sun Yoo ),박수근 ( Soo Keun Park ),이근효 ( Keun Hyo Lee ),조기섭 ( Ki Sub Cho ) 한국열처리공학회 2018 熱處理工學會誌 Vol.31 No.4

W, Fe, and carbon powders were mechanical alloyed to produce W₃₅Fe₄₃C₂₂ ternary alloy powders containing nanocrystal W embedded within amorphous matrix. When the powder samples were heated to the primary crystallization temperature of 735℃, most parts of their amorphous region were fully crystallized to [W,Fe]- rich M₆C carbides. Interestingly, a little portion of the carbides changes to stoichiometric line compounds (M₁₂C and W₆Fe₇) and a solution phase (Fe-rich bcc), and remaining parts of the crystallites were amorphized again. The resulting microstructure was retained even by cyclic heating between room temperature of 1,200oC, and thus we found that the amorphous structure can be irreversibly formed at above glass transition temperature. (Received June 11, 2018; Revised June 25, 2018; Accepted July 3, 2018)

Evaluation of Na₂TiO₃ formation for producing crystalline BaTiO₃ nanoparticles by liquid–solid–solution process at low temperature

Han, Wooje,Lee, Hong-Sub,Yoo, Byungwook,Park, Hyung-Ho Elsevier 2017 JOURNAL OF ALLOYS AND COMPOUNDS Vol.695 No.-

<P><B>Abstract</B></P> <P>Crystalline barium titanate (BaTiO<SUB>3</SUB>) nanoparticles were synthesized by refluxing in an air atmosphere at a low temperature using sodium hydroxide. The reaction mechanism of BaTiO<SUB>3</SUB> nanoparticle formation by this new liquid–solid–solution (LSS) synthesis route with refluxing in an air atmosphere at a low temperature of 80 °C was demonstrated to be a facile fabrication process for BaTiO<SUB>3</SUB> nanoparticles with a high crystalline quality and minimized agglomeration rate. BaTiO<SUB>3</SUB> nanoparticles were formed via sodium titanate (Na<SUB>2</SUB>TiO<SUB>3</SUB>), and the size of the BaTiO<SUB>3</SUB> nanoparticles decreased with increasing sodium hydroxide concentration. The formation of a Na<SUB>2</SUB>TiO<SUB>3</SUB> intermediate phase was confirmed by energy dispersive X-ray spectroscopy and X-ray diffraction analysis. The capping ligands of BaTiO<SUB>3</SUB> suggest that hydroxyl and oleic acid are present. The dielectric constant of the crystalline BaTiO<SUB>3</SUB> nanoparticles was higher than 150.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Pure crystalline BaTiO<SUB>3</SUB> nanoparticles were synthesized by new synthesis route. </LI> <LI> BaTiO<SUB>3</SUB> nanoparticles were synthesized at 80 °C through refluxing in air atmosphere. </LI> <LI> BaTiO<SUB>3</SUB> nanoparticles were formed through Na<SUB>2</SUB>TiO<SUB>3</SUB> as a chemical intermediate. </LI> <LI> The concentration of NaOH plays an important role to BaTiO<SUB>3</SUB> phase formation. </LI> <LI> The concentration of NaOH plays an important role to control the size of BaTiO<SUB>3</SUB>. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>