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서경준,서정욱 제어로봇시스템학회 2021 제어로봇시스템학회 국내학술대회 논문집 Vol.2021 No.6
Gravity compensation mechanism is one of the oldest topics in robotics. Mechanical gravity compensation can theoretically make the motor unloaded. Compensation torque generated by spring tension removes the torque caused by gravity. However, when tensile or compressive force is applied to the spring, the gravity center of the overall rotating linkage changes. It can even cause the overall compensation torque error. Specific research is needed that the center of gravity change causes errors in the overall torque. In the paper, assuming there is no friction and zero idler radius, the error torque due to the change of the gravity center of the overall rotating linkage is calculated. This research proposes a method to identify the overall cause of gravitational center change error caused by moving back and forth of the spring. Studying mechanisms for reducing gravity errors to improve performance will also help to design a multiple degree of freedom manipulator.
사경증의 한방 치료에 대한 체계적 문헌고찰 (2018년부터 2023년 연구를 중심으로)
서경준,최종찬,지민준,권도영,양재은,구지향,이은정,오민석 한방재활의학과학회 2024 한방재활의학과학회지 Vol.34 No.2
Objectives The purpose of this study is to systemically review the recent studies in the Korean medicine treatments for torticollis. Methods We search the clinical studies from January 1, 2018 to December 31, 2023. The studies were searched through 10 databases (Oriental Medicine Advanced Searching Integrated System, Korean studies Information Service System, Research Information Sharing Service, Korean Medical Database, ScienceON, PubMed, Cochrane Library, Embase, Wanfang Data, China National Knowledge Infrastructure). Results A total of 19 studies were included in the study. 12 studies were case report studies, 5 studies were randomized controlled trials, 2 studies were non-randomized controlled trials. Of the 19 interventions, Chuna was the most used in this study and of the 28 evaluation tools, Sternocleidomastoid thickness was the most used in this study except efficiency rate. All 19 studies had improvements after treatment, and 8 studies had statistically significant improvements. As a result of the study, we found that Chuna, GB, GB20, BL10, Glycyrrhiza uralensis were commonly used Korean medicine treatments for torticollis. Conclusions We analyzed the Korean medicine treatments for torticollis. Through this study, we found that the Korean medicine was effective for torticollis. However, more research is needed to confirm the more detailed effect.
서경준,김형연,이재원,김명길,서성용,김충익 한국공업화학회 2017 Journal of Industrial and Engineering Chemistry Vol.53 No.-
m-Nitrido diiron phthalocyanine complex has shown great performance in cyclohexane oxidation. Catalytic activity of m-nitrido-bis[tetra(tert-butyl)phthalocyaninatoiron] complex could dramatically be enhanced in the presence of perfluoro carboxylic acid. Turnover number of cyclohexane oxidation reached 504, with 10 mM of trifluoro acetic acid (TFA), which is more than 15-fold increase compared to that without TFA. Interaction between perfluorinated COO group and metal center is thought to form stable reaction intermediate and accelerate the reaction. Furthermore, relationship between carbon length of perfluoro carboxylic acid and co-catalytic performance of cyclohexane oxidation was also investigated and the shorter perfluoro carboxylic acid provided higher enhancement.
서경준,김충익 한국공업화학회 2015 한국공업화학회 연구논문 초록집 Vol.2015 No.0
Organic semiconductors have drawn significant interest as essential components of various flexible electronic devices such as flexible displays, printable RFID tags, and sensors. To enhance the electrical properties of organic semiconductors, the design, synthesis, and characterization of new organic semiconductors has been of great interest. 1,2,4-Triazoline-3,5-dione derivatives are known to have various biological activities. The core structure of phenyl triazolopyridazine derivatives seems to be promising as potential organic semiconductors. To validate this possibility, two new compounds are synthesized and characterized using DSC, TGA, UV-vis, CV, XRD, and AFM. Organic TFT performance was showing but low.
서경준,지민준,구지향,이은정,오민석 한의병리학회 2023 동의생리병리학회지 Vol.37 No.5
The object of this study is to identify the effect of acupuncture for torticollis by assessing pain and functional improvement. Studies will be searched from 11 Databases(Cochrane library, EMbase, Pubmed, Citation Information by NII [CiNII], China National Knowledge Infrastructure [CNKI], WanFang Data, Koreanstudies Information Service System [KISS] KMbase, ScienceON, KoreaMed and OASIS). We will select participants that diagnosed with torticollis, regardless of cause, gender, age, race and interventions will be acupuncture, electroacupuncture, dry needling, fire needle. Main outcome will be visual analogue scale(VAS) and numeric rating scale(NRS) to assess the degree of pain. The control group will be the torticollis patients who treated by other treatments except interventions. This study will be included randomized controlled trials on acupuncture treatment for torticollis. Data extracted from the above process will follow the Cochrane risk of bias tools and PRISMA flow diagram. The data results of the meta-analysis will be calculated through Cochrane's RevMan 5.4 and extracted values. The pain index and the improvement of cervical function will be analyzed using a standardized mean difference and 95% confidence interval (CI) as continuous variables. This study is currently registered in PROPERO(ID:CRD42023442199). Through this study, it is expected that the effect of acupuncture on torticollis will be considered, and acupuncture treatment for torticollis patients will be more reliable on this study.