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서국웅,양점홍,윤양진,황영성,이중숙,김용재,유경복 釜山大學校 附設 體育科學硏究所 1994 體育科學硏究所 論文集 Vol.10 No.-
The purpose of this study was to get the quantitative data of effect of two different load carrying system on Kinematics and Kinetics. The subjects for the research were 2-adults. The mechanism of each load carrying pattern was measured by a motion analylizer, a forceplatform and EMG system. The conclusions were get from Kinematics variables and Kinetics variables. 1. It was not effected at the vertical reaction force(Fz) of left, right foot according to the big value the 1st peack of 10kg, 15kg fore, back-pack carrying system, 20 kgw, 30 kgw back-pack carrying system in walking. But it was effected at the vertical reaction force(Fz) on 30 kgw back-pack carrying system in walking. 2. It was not effected at the Anterior-Posterior reaction force(Fx) of left, right foot according to high value of the 1st peack on 10 kgw, 15 kgw fore, back-pack carrying in walking. But, it was effected on the 20 kgw, 30 kgw only back-pack carrying in walking. 3. It was effected at the left-right reaction force(Fy) of left-right foot according to the big value of the 2nd peak on 10 kgw, 15 kgw fore-backpack carrying system in walking. It was more effective than 20 kgw, 30 kgw back-pack carrying system in walking. There was not disorder force(Fx) on 10 kgw, 15 kgw fore-backpack carrying system in walking. 4. Analysis of computer graphic, on the pack carrying system in walking. It was efficient in 10 kgw, 15 kgw fore-backpack carrying system in walking. But, it was efficient on 20 kgw, 30 kgw backpack carrying in walking. Castrocnemius, Tibialis anterior, Vastus lateralis, Vastus medialis, are stressed to bend their body foreward. So it occurred fatigue fast, injured muscles and joints. 5. Extension anyles and flection angles of the knee joint and the hip joint on 10 kgw, 15 kgw fore-backpack carrying system in walking showed less than those on 20 kgw, 30 kgw backpack carrying system in walking. It was efficient on the 10 kgw, 15 kgw fore-backpack carrying system in walking. 6. Magnitudes of EMG of Castrocnemius, Tibialis anterior, Vastus lateralis, Vastus medialis, were increased according to increasing weight road and were decreased on the 20 kgw, 30 kgw back-pack carrying system in walking.
Bok-Joong Yoon,Jung-Hun Na,Seung-Kwon Jung,Jung-Ha Kim 제어로봇시스템학회 2008 제어로봇시스템학회 국제학술대회 논문집 Vol.2008 No.10
This research proposes a navigation algorithm using multiple GPS units and a differential GPS (DGPS) unit simultaneously, a compass, encoders, and optimized global mapping. GPS systems sometimes lose their signals and receive inaccurate position data due to many factors, such as obstructions. This paper shows that GPS failure can be solved by using a DR navigation method with encoders and a compass, and that position errors can be decreased by using multiple GPS units and a DGPS unit. In addition to this method, a smoothing algorithm will be used to improve the UGV’ driving ability, and an expanded-route data definition file (Ex-RDDF) will be created to compare with current data to estimate GPS error.
ICT 융합기술을 활용한 암반특성 예측기능을 가진 유압 브레이커 개발에 관한 연구
윤복중(Bok Joong Yoon),이길수(Kil Soo Lee),임훈(Hoon Lim),이호연(Ho Yeon Lee),이명규(Myung Gyu Lee),권혁진(Hyuk Jin Kwon),김갑태(Kab Tae Kim),주진무(Jin Moo Joo) 대한기계학회 2017 大韓機械學會論文集A Vol.41 No.7
고유가, 환경규제 등의 국제무역환경 변화에 따라 수출주력상품인 유압 브레이커의 고부가가치화를 위하여 지능형 전자제어유압시스템 분야인 ICT 융합기술을 활용하여 암반특성을 예측하고 최적모드(다단형)로 구동하는 지능형 파쇄기술 및 에너지 효율을 극대화할 수 있는 유압 브레이커 개발에 관한 연구를 수행하였다. 본 연구에서는 암반의 강도에 따라 최적의 타격력을 제공하기 위해 근접센서를 이용해 암반 타격 시 피스톤의 하강 깊이를 측정하고 이를 통해 암반의 특성을 판별하여 타격력을 결정하는 피스톤 스트로크의 길이를 솔레노이드 밸브를 이용해 제어하였다. 다단 타격시스템을 위해 컨트롤러와 디스플레이/조작장치를 개발하였고, 무선통신을 이용하여 상호 정보교환이 가능하도록 하였다. 최종적으로 암반 강도에 따라 3단으로 타격할 수 있는 제어시스템을 개발하였고, 실차실험을 통해 이를 검증하였다. We have carried out the development for hydraulic breaker which can be operated by optimal mode with ICT convergence technology. This developed system can predict the rock properties. Moreover, this system can maximize the energy efficient with intelligent control of hydraulic system. In order to provide the optimal impact force, this system can measure the descending depth of piston with the proximity sensor and discriminate the rock properties with the measuring data and control the piston stroke using solenoid valve eventually. In addition, we have developed the controller, display module and operating device for cascade (multi-level impact) system and applied the module which can communicate each system by wireless communications. In conclusion, the control system which can control the multi-level impact in accordance with strength of rocks has been developed and approved by several field tests.
Yoon Hyun Joong,Park Haeng Soon,Bom Hee-Seung,Roh Young Bok,Kim Jong Se,Kim Young Ho The Pharmaceutical Society of Korea 2005 Archives of Pharmacal Research Vol.28 No.9
The purpose of this study was to investigate the safety of chitosan oligosaccharide and the effects of chitosan oligosaccharide on mercury induced genotoxicity in mice using the micronuclei and chromosome aberration. The micronuclei test was performed by microscopic examination $(\times1,000,\;stained\;using\;a\;May-Grunwald\;solution)$ after administering 0.01, 0.1, and $1\%(10\;mg/mL)$ chitosan oligosaccharide for 7, 60, and 180 days ad libitum in mice. Total micronuclei of 1,000 polychromatic erythrocytes were recorded for each group. There was no difference between the untreated and experimental groups. The intake periods and concentrations of chitosan oligosaccharide did not affect the occurrence of micronuclei in bone marrow cells (P>0.05). The chromosomal aberration test was performed by microscopic examination $({\times}1,000,\;stained\;using\;a\;4\%\;Giemsa\;solution)$ after administering the same concentration of chitosan oligosaccharide to mice, in $F_1,\;F_2,\;F_3$ generations and parents. The frequency of chromosomal aberrations was defined as [Ydr=(D+R)/total number of counted lymphocytes]. Similar to the micronuclei test, there was no difference between the untreated and treated groups. These results showed that the intake periods and concentrations of chitosan oligosaccharide did not affect chromosomal aberrations in bone marrow cells (P>0.05). To investigate the effect of chitosan oligosaccharide on mercury-induced chromosome aberration, mice in each condition were supplied with $^{203}HgCl_2$ and chitosan oligosaccharide ad libitum. Chitosan oligosaccharide significantly inhibited $^{203}HgCl_2-induced$ chromosome aberration in mice. Based on the results of this study, it may be concluded that the chitosan oligosaccharide is a nontoxic material that could be used as a suppressor of heavy metal-induced genotoxicity.
T-cell leukemia cutis in patient with acute monoblastic leukemia
( Bok Won Park ),( Ji Ha Yoon ),( Eun Byul Cho ),( Eun Joo Park ),( Kwang Ho Kim ),( Kwang Joong Kim ) 대한피부과학회 2018 대한피부과학회 학술발표대회집 Vol.70 No.1
A 70-year-old woman was referred for brown to gray colored papules and nodules on her both lower legs. She was diagnosed with diffuse large B-cell lymphoma in her stomach 3 years ago. Involvement of bone marrow was not suspected, but bone marrow biopsy revealed myelodysplastic syndrome. She was treated with R-CHOP and DHAP. 6 months after complete remission, she exhibited recurrence and was hospitalized. The bone marrow biopsy showed acute monoblastic leukemia with 90.8% blasts of ANC with positive for PAS, ANAE. During being treated with DACOGEN regimen, the skin lesions developed. Skin biopsy showed leukemic involvement with positive for CD3, CD4, and CD5. Malignancy of lymphoid cells with T-cell differentiation and leukemic involvement are suspected, and T-cell receptor gene rearrangement showed monoclonal proliferation. During treatment, neutropenic fever developed and patient died due to sepsis. AMoL was thought to be aggravation from MDS, and whether the T-cell leukemia cutis represented with lineage switch of the AMoL or a new secondary malignancy could not be proven due to the absence of molecular or clonal markers. Not only the case of lineage switch from a myeloid to T-cell phenotype but also coexistence of AMoL and T-cell leukemia is exceptionally rare. Several potential mechanisms explain the lineage switch in acute leukemia, but its precise mechanism is unclear. We herein report the rare case of T-cell leukemia cutis.
Hwang Yoon Joong,McCord Marian G.,Kang Bok Choon The Korean Fiber Society 2005 Fibers and polymers Vol.6 No.2
Helium-oxygen plasma treatments were conducted to modify poly(trimethylene terephthalate) (PIT) and poly(ethylene terephthalate) (PET) warp knitted fabrics under atmospheric pressure. Lubricant and contamination removals by plasma etching effect were examined by weight loss $(\%)$ measurements and scanning electron microscopy (SEM) analysis. Surface oxidation by plasma treatments was revealed by x-ray photoelectron spectroscopy (XPS) analyses, resulting in formation of hydrophilic groups and moisture regain $(\%)$ enhancement. Low-stress mechanical properties (evaluated by Kawabata evaluation system) and bulk properties (air permeability and bust strength) were enhanced by plasma treatment. Increasing interfiber and interyarn frictions might play important roles in enhancing surface property changes by plasma etching effect, and then changing low-stress mechanical properties and bulk properties for both fabrics.