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한민우,박채규,박철수,안희준,서정범,이영종 대한본초학회 2019 大韓本草學會誌 Vol.34 No.2
Objectives : Agastachis herba is a aerial part of Agastache rugosa(Fischer et Meyer) O. Kuntze which has been used as traditional medicines. Methods : The samples were collected using a domestic cultivation of Agastachis Herba. We experiment on essential oil content, the content of ethanol soluble extracts and HPLC profiling. Results : Loss on drying of Agastachis Herba contents of harvest in June ~ July was 4.93~8.26% and contents of harvest in August ~ September was 3.88~5.38%. Ash of Agastachis Herba contents of harvest in June ~ July was 5.07~7.97% and contents of harvest in August ~ September was 4.55~7.61%. Acid-insoluble ash of Agastachis Herba contents of harvest in June ~ July was 0.43~1.62% and contents of harvest in August ~ September was 0.46~1.44%. Essential oil contents of Agastachis Herba contents of harvest in June ~ July was 0.2~0.4 ㎖ and contents of harvest in August ~ September was 0.2~0.6 ㎖. Ethanol soluble extracts of Agastachis Herba contents of harvest in June ~ July was 9.72~20.44% and contents of harvest in August ~ September was 11.00~18.70%. HPLC profiling was detected of tilianin(12.93 min), acacetin(15.84 min) and agastachoside(17.95 min). Conclusion : Agastachis Herba should be harvested from August ~ September, the time of flowering. This is because of the high content of active compounds.
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ResQBot: 재해 상황에서 수색 · 구조용 소프트 로봇 개발
한민우 한국스마트치안학회 2023 스마트치안연구 Vol.4 No.2
지진과 같은 불가피한 재난 상황에서 신속한 수색 및 구출 작업은 무엇보다 중요하지만 추가 피해에 대한 우려가 이를 막고 있는 상황이다. 따라서 본 연구는 재난 구조 상황에서 수색 작업을 선행할 수 있는 구조용 소프트 로봇, ‘ResQBot’을 개발하였다. ‘ResQbot’은 불균질한 잔해 속에서 구조 작업이 용이하도록 공압 작동기를 동작하며, 비강체 조직으로 기존 강체 로봇의 파손 위험성을 해소하는 방안을 제시한다. 본 연구에서는 ResQBot의 구조 작업에 대한 적용 가능성을 살펴보기 위해 이동 속도를 평가하고, 팽창부 한계치 및 잔해물 허용치를 측정하는 실험을 수행하여 ResQBot이 실제 구조 작업에서 효율적으로 활용될 수 있는가에 대한 고찰을 진행하고자 한다. In inevitable disaster situations such as earthquakes, rapid search and rescue operations are of utmost importance, but the fear of further damage prevents them. In this study, we developed a rescue soft robot, ‘ResQBot’ that can precede search operations in disaster rescue situations. ‘ResQBot’ operates a pneumatic actuator to facilitate rescue operations in heterogeneous debris, and proposes a way to solve the risk of breakage of existing rigid robots with non-rigid tissues. The study conducted an analysis of the mobility through speed measurements and examined the load-bearing capacity of the expansion unit, providing evidence that ResQBot can be safely and efficiently utilized in actual rescue operations.
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한민우,이정근,Han, Min Woo,Lee, Jeong Keun 대한악안면성형재건외과학회 2013 Maxillofacial Plastic Reconstructive Surgery Vol.35 No.4
Purpose: This study is to evaluate the efficacy of the autogenous tooth bone graft material, clinically and radiologically, as related to implant installation. Methods: In oral and maxillofacial surgery department of Ajou University Hospital, guided bone regeneration (GBR), implant placement combined with GBR, sinus graft, implant placement combined with sinus graft, and defect filling were performed in 46 patients, using autogenous tooth bone. Among these, 66 implants were inserted with autogenous tooth bone. Implant stability quotient (ISQ) was measured by Osstell Mentor (Integration Diagnostics, Goteborg, Sweden) on 39 implants on the operation date and 4 months later, and on 21 implants 9months on the average at the final setting of restoration. Twenty-eight implants with GBR and sinus graft (GBR group: n=14, sinus graft group: n=14) were evaluated radiologically to measure the resorption of grafted autogenous tooth bone after loading. Results: The average initial stabilization of the installed implants was 67 ISQ, and the average secondary stabilization at 4 months later was 76. The average bone loss of GBR group as measured 8.0 months after application of prosthesis loading was 0.29 mm and the average bone loss of the sinus graft group as measured 7.6 months after application of prosthesis loading was 0.66 mm, respectively. In the histological assessment, formation of the new bone and continuous trabecular bone pattern was identified around autogenous tooth bone. Conclusion: Based on these results, we concluded that autogenous tooth bone is an excellent bone graft material that can substitute the autogenous bone.
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Origami구조와 Tensegrity구조를 결합한 Deformable Patrol Robot
한민우 한국스마트치안학회 2023 스마트치안연구 Vol.4 No.2
산악 및 계곡 지역에서는 등산로를 벗어난 이동, 계곡 주변 사고 등으로 인한 실종과 범죄가 자주 발생한다. 지역의 특성상 고정식 CCTV는 나무와 같은 장애물로 인해 시야가 제한되며, 드론 또한 비슷한 시각적 제약을 겪는다. 이러한 한계를 극복하기 위해, 본 논문은 Origami 구조와 Tensegrity 구조를 접목한 새로운 형태의 Patrol Robot을 제안한다. Origami 휠은 높이 조절 기능을 제공하여, 다양한 지형에서의 주행 능력을 향상시킨다. 이 휠 구조는 변화하는 지형 조건에 적응할 수 있도록 유연하게 설계되었다. Tensegrity 구조를 활용하여 로봇의 너비 조정이 가능하며, 이를 통해 좁은 폭의 공간을 이동할 수 있다. 이러한 구조적 유연성은 산악 및 계곡 지역의 다양한 장애물을 효과적으로 극복하는 데 도움이 된다. 이 시스템은 실시간으로 CCTV 영상을 전송하고, 관제센터에서 로봇을 효율적으로 조정할 수 있도록 한다. 따라서 본 논문은 Origami 휠과 Tensegrity 구조의 결합이 어떻게 효과적인 Patrol Robot을 만들어내는지에 대한 연구 결과를 제시한다. 또한, 이 시스템이 어떻게 현장에서 실제로 사용될 수 있는지에 대한 시험 결과도 포함된다. In mountainous and valley areas, where wandering off hiking trails, accidents around valleys, and related missing persons and crimes frequently occur, this paper proposes a new type of Patrol Robot that integrates Origami and Tensegrity structures. This robot features Origami wheels that offer height adjustment, enhancing its ability to navigate various terrains. The wheel structure is designed to be flexible, adapting to changing terrain conditions. The Tensegrity structure allows for the adjustment of the robot's width, enabling it to move through narrow spaces. This structural flexibility is crucial in effectively overcoming the diverse obstacles found in mountainous and valley areas. The system transmits live CCTV footage and allows for efficient control of the robot from a control center. Thus, this paper presents the results of a study on how the combination of Origami wheels and Tensegrity structures creates an effective Patrol Robot. It also includes test results on how this system can be practically used in the field.
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한민우,박재성,곽이성,안희준,서정범,이영종,박채규 한국약용작물학회 2016 한국약용작물학회지 Vol.24 No.6
Background: Leonurine is a the aerial part of Leonurus japonicus Houttuyn, which has been used as a traditional medicines and is registered in the Korean Pharmacopoeia.Methods and Results:In the present study we performed a heavy metals and thin layer chromatography and measured loss on drying, as well as the contents of total ash, acid-insoluble ash, ethanol soluble compounds, and leonurine, using 15 domestically collected L. japonicus samples. The methods were performed according to the ‘crude drugs test of the general test, processes and apparatus’, published by MFDS, Korea (2014). The purity test (heavy metals) indicated that levels of Pb and Hg were 0.35 - 3.64, and 0.001 ppm, respectively, whereas the levels of As and Cd were undetectable, and stachydrine was identified by thin layer chromatography (Rf : 0.15). We found that 5.93 - 10.62% (average: 8.58 ± 1.8%) of the sample mass was lost during drying, and the contents of total ash, acid-insoluble ash, ethanol soluble compounds, and leonurine were 7.87 - 10.84% (average: 9.62 ± 0.82%), 0.99 - 1.76% (average: 1.38 ± 0.24%), 16.70 - 23.11% (average: 19.49 ± 2.14%) and 0.04 - 0.17% (average: 0.11 ± 0.04%) respectively. In addition, HPLC profiling detected leonurine (5.94 min), rutin (16.43 min) and myricetin (26.78 min).Conclusions:We hope that this the rusult of the present study will contribute to the standardization and quality control of Korean herbal medicines.
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