The study aims at analyzing a species composition of the fish live in bottom of the coastal waters off Geomun island, Korea. To reach the goal of the study, a species composition and it’s monthly fluctuation, a monthly fluctuation of the dominant species and it’s appearance type was analyzed the fishes caught by the bottom trawl. The result obtained can be summerrized as follows; Fish caught in this area composes 14 orders, 34 families, and 47 species. The largest number of fish species was Perciformes (15 families and 19 species). The most dominant species in an number of fish was jhon dory, Zeus faber which was occupied at 22.5% from the whole number, the second most dominant species was horse mackerel, Trachurus japonicus which was occupied at 21.2%. Four groups were categorized based on appearance time period.

Sambok (三伏, Three Hottest Days) is the common designation of Chobok (初伏, Early Hot Day), Jungbok (中伏, Middle Hot Day), and Malbok (末伏, Late Hot Day), and widely known to be one of the Korean folk customs. Hence, Sambok is notated in Manseryeok (Ten Thousand-Year Almanac) and in the annual astronomical almanac published by Korea Astronomy and Space Science Institute. In this paper, we investigate the changes of Sambok in Korea based on various documents such as Joseonwangjosilok (朝鮮 王朝實錄, Annals of the Joseon Dynasty), Jeungbo-Jakryeoksik (增補作曆式, The Supplement of Manual for Calendar Making), astronomical almanacs, and so forth. According to Jeungbo-Jakryeoksik preserved in Kyujanggak Institute for Korean Studies, Chobok and Jungbok are defined as the third and fourth Gyeongil (庚日, The Day Starting with the Seventh Heavenly Stems in Sexagenary Cycles Assigned to Each Day) after the summer solstice, respectively, and Malbok is the first Gyeongil after Ipchu (Enthronement of Autumn). However, if the summer solstice is Gyeongil, then the third Gyeongil counting from the solstice becomes Chobok. Malbok depends on the time of Ipchu. Ipchu itself becomes Malbok if the time of Ipchu is in the morning, or next Gyeongil becomes Malbok if it is the afternoon. On the other hand, Malbok is defined as Ipchu itself regardless of its time according to Chiljeongbobeob (七政步法, Calculating Method for Sun, Moon, and Five Planets), Chubocheobryeo (推步捷例, Quick Examples for Calendrical Calculations), and so on. To verify the methods used to determine Sambok, we examined the record in the extant almanacs during the period of 1392 to 2100 for which the summer solstice or Ipchu is Gyeongil. As a result, we found a periodicity that if the time of Ipchu is in the morning, in general, the time is in the afternoon after two years and then is back into in the morning after nineteen years, i.e., the 2 + 19 years periodicity. However, we found the 2 + 17 years periodicity in some years. We also found that the Chobok method of Jeungbo-Jakryeoksik has been used since 1712, the thirty-eighth reign of King Sukjong (肅宗). In addition, we supposed that Malbok had been determined by the method like Chubocheobryeo since either 1846, the twelfth reign of King Heonjong (憲宗), or 1867, the fourth reign of King Gojong (高宗). At present, these methods of Sambok are customarily used without any legal basis. We, therefore, think that this study will help conventionalize the method defining Sambok in the future.

항산화 기능은 암이나 심혈관질환 발생을 억제하는 것으로 보고되고 있어서 다양한 식물들에 대해서 항산화 효 과가 연구되고 있다. 그러나, 채소류에 대해서는 항산화 효과에 대한 광범위한 조사는 이루어지지 않아 단지 몇몇 천연 항산화제만이 식품 산업에서 이용되고 있다. 따라서, 본 연구에서는 식품 산업에서 다양한 천연 항산화제를 이용 할 수 있도록, 여러 가지 채소류에 대해 항산화 활성을 조사하여 채소류 중 항산화 효과에 대한 과학적 자료를 제공하기 위해 수행되었다. 24 품목의 채소류를 대상으로 총 275개의 시료를 구입하여 항산화 효과를 측정하였다. 총 페놀 함량(TPCs)은 gallic acid를 대조 표준용액으로 Folin- Ciocalteu 시약을 사용하여 비색법으로 측정하였으며 DPPH 라디컬 소거능은 IC50(DPPH 라디칼을 50% 저해하는데 필요한 추출물의 농도) 농도로 측정하였다. 조사 결과 여러 가지 채소류에 대한 총 페놀 함량은 0.32~49.26 μg/kg 였으며 DPPH 라디컬 소거 활성은 0.0~2.43 mg/mL로 조사 되었다. 본 연구에서 조사된 채소류 중 항산화 효과가 가장 좋은 채소는 2가지 항산화 측정 방법에서 모두 마늘 이였다.

Instruments for surgical and dental application based on oscillatory mechanics submit unwanted vibrations to the surgeon's and dentist's hands. frequently the weight of the instrument's body is increased to dampen its vibration. Because medical devices to contact with human body directly are sterilized before use, conventional damping method and damper are not good for medical use. For dissipation of vibration, based on recent research regarding the optimization of particle damping, we made a prototype particle damper that dissipate the vibration of oscillatory saw and tested for validation of particle damping. As a result we found that particle damper operate more efficiently than solid mass damper if the geometry of the damper is optimized with respect to the specific amplitude of the vibration.

본 연구는 국내 유통 방풍(S. divaricata, P. japonicum, G. littoralis) 한약재의 원산지 판별을 위해 수행 되었다. 이를 위 해, 형태적 특징비교 뿐만 아니라 엽록체(nrDNA-ITS2) 및 핵 DNA 바코드 유전자(cpDNA-matK, psbA-trnH, rpoB2와 rpoC1)를 이용한 염기서열 분석을 수행하였다. 방풍류 3종의 형태적 특징을 비교한 결과, 잎 모양과 거치의 형태에서 가장 큰 차이를 보인 반면, 건조약재의 경우 육안으로 구별하기에 어려움이 있었다. DNA 수준에서의 차이를 비교하기 위해 DNA 바코드 후보 유전자들을 이용한 방풍류 3종의 식물자원 에 대한 염기서열 분석을 수행한 후 판별 마커 개발 가능성이 있는 ITS2와 matK, psbA-trnH 세 primer를 선발하였다. 이 를 국내 유통 한약재에 적용한 경우 방풍은 S. divaricata와, 식방풍은 P. japonicum과, 해방풍은 G. littoralis와 동일한 것 으로 확인되었다. 중국산 방풍은 S. divaricata와 동일종으로 바르게 표기되어 유통되나, 국산 방풍은 P. japonicum과 동일 종으로 식방풍(갯기름나물)의 뿌리를 건조시켜 방풍으로 혼용 유통됨을 확인하였다. ITS2 구간의 염기서열 분석 결과, 식방 풍의 경우 두 그룹으로 나눠져 동일 종 내에 유전적 변이가 있음이 확인되었다. 따라서 본 연구결과 방풍류 3종 판별을 위 해 nrDNA-ITS2와 cpDNA-matK, psbA-trnH의 사용이 유용 할 것이며, 차후 방풍류 한약재의 판별을 위한 마커 개발 연 구의 기초 자료로서 활용될 수 있을 것으로 사료된다.

국민의 건강과 웰빙에 대한 관심 증대 및 소득 증가로 한약재 소비를 비롯한 식품과 화장품 원료로서의 산업적 가치가 커지면서 약용작물의 수요는 점차 증가할 것으로 예상하며 한, 중 FTA 체결로 인해 약용작물 시장개방의 수입증가는 위협요인으로 작용할 것이다. 그러한 측면에 서 약용작물을 포함한 농식품산업을 미래 성장 동력산업 으로 육성하기 위해서는 종자품종육성과 생산유통기반의 정비와 확충, 산지이용규제 완화 등의 다양한 대책이 마련되어야 한다. 본 연구 결과의 활용방안을 살펴보면 다음과 같다. 첫째, 국가의 약용산업 육성 중장기 전략과 종자관리 체계의 구축에 필요한 약용작물의 데이터베이스를 구축 하고 향후 개발해야 할 중점기술을 제시해야 한다. 둘째, 우수한 약용작물 품종 개발 및 보급으로 농업생산성을 높여야 한다. 셋째, 약용작물 종자생산 및 보급에 필요한 제도정비가 필요하다. 넷째, 우량종자의 표준화 및 규격화 로 약용작물의 생산유통체계를 확립해야 한다. 현재 약용 작물의 소비행태는 직접적인 섭취보다 화장품, 의약품, 식품의 형태로 소비되는 패턴으로 바뀌고 있으며 규모가 점점 확대될 것으로 전망된다. 그러므로 향후 약용작물의 생산에서는 이러한 산업화 추세와 변화에 대응한 정책개 발과 제도적인 개선이 뒷받침되어야 한다.

This study has conducted a comparative analysis on the fishing efficiency of LED fishing lamps by squid jigging vessels, the Yeongrak-ho (16 tons) and Somang-ho (9.77 tons), which operated during September and October 2010 and during October 2011, comparing with MH (Metal Halide) fishing lamp-equipped fishing vessels. This study has also examined vessel's fuel consumption level. The light powers of LED fishing lamps of the Yeongrak-ho and Somang-ho were 25.8kW and 32kW, respectively. Those of the MH fishing vessels, that is, the MH fishing lamp-equipped fishing vessels, were 105kW and 81kW, respectively. The average squid catch in number of an LED vessel, Yeongrak-ho, was 39.2% of the MH fishing lamp-equipped fishing vessels; however, that of the Somang-ho improved to 78.7% of the MH fishing lamp-equipped vessels. Average catch in number by Yeongrak-ho crew was 2.6 times more than catch in number by automatic jigging machines. Average catch in number by MH fishing vessel crew was 1.8 times more than that by automatic jigging machines. An LED vessel, Yeongrak-ho's fishing rate was 17.5%~152.2% of the MH fishing vessels, that is, 61.1% on average, in comparison of combined catch in number per automatic jigging machine and per crewmember. Somang-ho's fishing rate was 6.7%~127.6% of the MH fishing vessels, that is, 73.1% on average. The average fuel consumption level of the Somang-ho, throughout its departure from to arrival at the port, was 475.7l, and that during fishing hours was 109.6l, or 23.0% of the total fuel consumption level. Somang-ho's fuel consumption level per fishing hour was 9.7l on average.

PURPOSES : This study analyzed the regional dew possibility in road sign using meteorological data. METHODS : Four years of meteorological data such as temperature, humidity, dew point, wind velocity were collected and analyzed. As a result of literature review, dew was frequent in large diurnal range, high humidity and weak wind. So, dew possibility was analyzed by (temperature-dew point ≤1℃ and wind velocity ≤ 1.5m/s). RESULTS : The possibility was analyzed for each meteorological observation point and the point of Suncheon and Bonghwa were selected as the most likely points of dew in road sign. The area of East Coast, Kyungbuk and Kyungnam were relatively low potential. CONCLUSIONS : Alternative with high effect of preventing dew should be selected in high possibility dew area despite of low economics.

Decoys for automatic jigging machines, the body part of a squid hook, have been developed in small and existing sizes in consideration of squid food, color blindness, and retinomotor responses and in utilization of pearl pigment, PP of high transparency, and combined mixture. In comparison of the developed silver-white decoy and existing decoys, the optical characteristics were examined, and the fishing performance of small size silver-white squid hooks was assessed in application of 4 fishing boats with the squid automatic jigging machine and metal halide fishing lamp in July, 2012. The luminances of the three squid hook colors-green, dark green and silver-white-increased as the intensity of illumination increased. Among these, the increase of silver-white was particularly distinguished. As to the average contrast of squid hooks, that of silver-white was 10.33, which was the highest, and then green 1.86 and dark green -0.10 in the order. As to the fishing performance of the silver-white hook, that of the 202 Geumyeong-ho and 101Yongjin-ho which caught squids were similar to that of the existing green hook and was relatively low in the case of the Dongbu-ho. However, that of the Haengbok-ho which caught relatively small squids whose average length was 19.9cm and installed silver-white hook in all automatic jigging machines was significantly excellent. In order to enhance the fishing performance of small size silver-white hooks, therefore, it would be effective to install in every automatic jigging machines of fishing boat and to start fishing before July by which small squids are caught.

최근 선박 대형화 추세가 급격하게 진전된 반면 국내 무역항의 수역시설 조건은 과거와 동일하여 특정 항로에서의 해상교통 혼잡이 발생할 개연성이 매우 높다. 국내항의 해상교통혼잡도를 평가하기 위해 사용하는 표준 선박길이는 70 m로, 30년 전부터 현재까지 그대로 사용하고 있어 이에 대한 검토가 시급하다. 본 연구에서는 국내 Port-MIS 데이터베이스에 저장된 60,000여척 선박 주요 제원을 기반으로 선박 대형화 추세를 분석하고, 최근선박의 총톤수와 선박 길이와의 상관함수를 이용해 선박 대형화가 반영된 표준 선박길이를 제안하였다. 또한 최근 5년간 국내 무역항 이용 선박에 대한 톤수별 척수를 기초로 소형선을 제외한 누적 빈도수가 50 % 이상 차지하는 기준점을 도출해 국내항의 표준 선박길이를 제안하였고, 각 표준 선박길이는 국내 무역항의 특성을 고려하여 적용할 필요가 있다.

PURPOSES : The objectives of this study are to develop the eco-friendly pavement material using polyurethane binder and evaluate mechanical properties of the developed binder and concrete. METHODS : The bending beam test was conducted to select the sample candidates of polyurethane binder based on the bending strength. The characteristics of viscosity, curing time, and temperature change of sample binder was examined on different temperature conditions. The mechanical properties of polyurethane binder was estimated using the dynamic modulus testing. The indirect tensile strength test was conducted on polyurethane binder concrete with different gradation and binder content for evaluating the mechanical properties of concretes. RESULTS : Based on the beading beam test, four different binder samples were prepared for estimate the mechanical properties. The viscosity of polyurethane binder tends to increase with increase of liquid temperature and the hardening phenomenon begins 10 to 15 minutes at room temperature after mixing the resin and hardener. It is observed that the dynamic modulus of binder increases as loading frequency increases and change of modulus is found to be the highest in the PU-2I binder type. The PU-2I binder concretes shows the largest value of indirect tensile strength and indirect tensile energy. CONCLUSIONS : The use of polyurethane binder as pavement materials is capable of increasing the pavement performance and reducing the detrimental environmental effect during the highway construction.

PURPOSES : The objective of this study is to evaluate the mechanical characteristics of castor oil based bio-polymer concrete for use of ultra thin overlays. METHODS : To evaluate the mechanical properties of bio-polymer concrete, the various laboratory tests including compressive, tensile, and flexural strength, and elongation tests were conducted on bio-polymer concrete specimens in this study. The mechanical characteristics of bio-polymer concretes were examined by changing the content of hardener and polymer binder to determine the optimum content for ultra-thin overlays. The bio-polymer concrete developed in this study was used for field trial test of the ultra-thin bridge deck pavement for verifying the workability and monitoring the long-term performance of materials. RESULTS : Test results showed that tensile and the flexural strength of bio-polymer concretes increase and the elongation of bio-polymer concrete decreases with increase of binder content. A field adhesive strength tests conducted on bridge deck pavement indicates the bio-polymer concrete has more than 2MPa of adhesive strength satisfy with the design criteria. CONCLUSIONS : The bio-polymer concrete with more than 20% content of castor oil was developed for ultra-thin overlays in this study. It is found from this study that the 35% of hardener content is most appropriate for maintaining the strength characteristics and flexibility.

본 연구에서는 비자림의 생태적 특성을 파악하고 건강진단을 통해 나주 불회사 비자림 산림유전자원보호구역의 관리방안을 도출하였다. A유형은 현 수준을 유지하면서 경쟁목이나 피해목이 발생할 경우에 이를 제거하거나 치료하는 소극적인 관리, B유형은 토양의 산성화를 개선하고 조릿대, 왕대와 굴참나무, 개서어나무 등의 낙엽활엽수들을 제거하여 비자림을 확대 육성하는 적극적인 관리, C유형은 편백림 안에서 토양의 산성화 개선과 기존 비자림 중심의 소극적 관리, D유형은 토양산성화 개선과 비자 치수를 보호 육성하기 위하여 경쟁관계에 있는 식생을 제거하는 적극적 관리를 도출하였다. 마지막으로 해당 산림유전자원보호구역은 IUCN 보호지역관리 카테고리에 따라 카테고리 III(자연기념물) 또는 IV(종서식지 보호구역)로 등록 관리되어야 함을 제안하였다.

L. brevis HY7401, L. helveticus HY7801 및 B. longum HY8004의 복합유산균 R&B Balance^®의 대장염 개선 효과를 DSS 처리 마우스에서 평가하였다. R&B Balance^® 섭취에 의해 대장길이 축소, MPO 활성과 같은 대장염 증상이 감소하였으며, 분변내 chondrointinase 활성과 분변 유전독성을 현저하게 감소시키는 것으로 나타났다. T-RFLP pattern의 군집 분석 결과, DSS-유도 대장염 마우스의 미생물총은 정상적인 마우스와 다르며, R&B Balance^®의 투여는 장내 미생물총의 다양성에 영향을 미칠 수 있음을 확인하였다. 따라서 R&B Balance^®는 DSS로 유도된 대장염 동물에서 대장염 증상을 개선해주고 분변 내 독성 효소나 유독한 대사산물을 생성을 억제함으로써 대장염을 개선하는 것으로 판단되고 대장염 동물의 장내 미생물 다양성에도 영향을 미치는 것으로 확인되었다.

본 연구는 국내 유통 감초약재의 원산지 판별을 위해 수행되었다. 이를 위해 약재로 쓰이는 만주감초(Glycyrrhiza uralensis) 및 유럽감초(G. glabra)와 약재로 사용되지 않는 국내 자생종 개감초(G. pallidiflora) 식물의 형태적 차이 및 엽록체와 핵 DNA 구간의 염기서열의 차이를 구명하였다. 감초식물 3종의 형태적 특징을 비교한 결과, 잎과 뿌리에서 차이를 보였다. 특히 잎의 형태에 있어서 중국감초와 유럽감초는난형 혹은 타원형인 반면, 개감초는 엽장/엽폭비가 큰 피침형이었다. 또한 건조된 뿌리로 시중되는 감초 한약재의 경우, 중국산과 한국산은 백색인 반면 우즈베키스탄산은 황백색이었다.감초식물 3종을 대상으로 DNA 수준에서의 차이를 비교한 결과 rpoB2, rpoC1에서는 G. uralensis와 G. glabra가 구분되지않았으며, psbA-trnH의 경우 단 한 구간의 SNP에서 차이를 보였다. 반면 ITS2에 의해 증폭된 450bp의 염기서열을 비교한 결과, G. glabra는 98, 99, 100번째 위치에서, G. pallidiflora는 137, 161, 164, 203, 296위치에서 감초 종간판별을 위한 특이적 SNP가 확인되었다. 또한, phylogenetic tree 분석을 통해, 약재로 쓰이는 G. uralensis과 G. glabra는 약재로 쓰이지 않는 G. pallidiflora에 비하여 유전적 거리가 가까움을 확인하였다. 본 표준시료에서 얻은 결과를 유통 한약재 원산지 판별에 적용한 결과, 중국산과 한국산의 한약재는 G. uralensis와 염기서열이 일치하였고, 우즈베키스탄으로부터 수입된 한약재는 G. glabra와 염기서열이 일치됨을 확인하였다. 이에 감초의 생체 및 한약재의 원산지 판별을 위해 ITS2를 이용한 분자수준에서의 판별이 유용하다고 판단된다.

This study surveyed the fishing efficiency for Japanese common squid based on improvements made to LED fishing lamps by utilizing the training ship of Gangwon Provincial College. The training ship, Haesong-ho (24 tons), was equipped with seventy-two 150W electric power LED fishing lamps (10.8kW), and their fishing efficiency and fuel consumption level were surveyed for a total of ten times during the period between June 15, 2009 and July 27, 2009. In addition, the training ship was equipped with seventy-one 300W electric power LED fishing lamps (21.3kW) and their fishing efficiency and fuel consumption level were surveyed for a total of five times during the period between January 17, 2010 and August 4, 2010. In order to compare the fishing efficiency of LED fishing lamps, the catch of another fishing vessel equipped with Metal Halide (MH) fishing lamps of 120kW for the same period and at the same fishing grounds. The fuel consumption levels during the fishing operation of Haesong-ho was about 1,047.7 liters which was approximately 19.9% of the total fuel consumption level of 5,262.6 liters, and the fuel consumption level per operation hour was on average 9.2 liters. The number of Japanese common squid caught by the LED fishing lamp-equipped fishing vessel ranged from 12 to 1,640 squid for each fishing trial and the average quantity was 652. The number of Japanese common squid caught by the MH fishing lamp-equipped 10 fishing vessels ranged from 40 to 4,800 squid and the average quantity was 2,055. The fishing of Japanese common squid was done by the use of hand lines and an automatic jigging machine. The number of Japanese common squid caught per hand line and a single roller of the automatic jigging machine was in the proportion of 50.8% to 49.2% with respect to the LED fishing lamp-equipped fishing vessel. However, the number of Japanese common squid caught per hand line and a single roller of the automatic jigging machine was in the proportion of 86.4% to 13.6% with respect to the MH fishing lamp-equipped fishing vessel where most of the catch was made by hand lines. On the other hand, in comparing the number of Japanese common squid caught per automatic jigging machine, the number of squid caught by the LED fishing lamp-equipped fishing vessel was about the same or greater than the number of squid caught by the MH fishing lamp-equipped fishing vessel.

In this paper, we study the structure of the Daegyupyo (大圭表, Large Gnomon) of the early Joseon dynasty. A Gyupyo (圭表, Gnomon that is Guibiao as pronounced in Chinese) is composed of a Pyo (表, Biao as pronounced in Chinese) making a shadow and a Gyu (圭, Gui as pronounced in Chinese) measuring its length. It is known that the Daegyupyo with the 40-feet height was constructed between the sixteenth to seventeenth year of the King Sejong reign (1444 - 1445) on the basis of the record of Yuanshi (元史, the History of the Yuan Dynasty). By analyzing historical documents such as Joseonwangjosillok (朝鮮王朝實錄, the Annals of the Joseon Dynasty), Yuanshi, and Jegaryeoksangjip (諸家曆象集, a work written by Sunji Lee), we found a possibility that the Ji (池, a pond) on the Gyu was located in the north side of the Pyo. This structure is different from that in previous studies, but is in a good agreement with that of the 40-feet Guibiao remaining in Dengfeng (登封) of China. Regarding to the Hoengyang (橫梁, cross-bar), we suggest that it was set up by double 5-feet supporting arms apart from the north tip of the Pyo in the radial direction. The 3:4:5 ratio in a rectangular triangle was used to place the Heongyang on the top of the Pyo at a distance of 4-feet (3-feet) in the vertical (horizontal) direction. We also discuss the structural problem when the Hoengyang is positioned apart from the top of the Pyo by supporting arms. In conclusion, we think that this study should be useful in restoring the Daegyupyo of the Joseon dynasty.

본 연구는 가지(Solanum melongena L.) 과실의 수확 후 품질보전을 위한 기술개발을 목적으로 MAP 저장 중 내 외부 저온장해의 발생에 미치는 1-MCP 및 이산화탄소의 영향을 구명하기 위하여 실시하였다. 가지의 저온장해 증상은 1-MCP 처리 후 4 및 8℃ 저장구에서 과실의 저온저장기간 경과에 따른 장해의 진전을 현저히 늦추었고 1.0μL·L-1 처리구는 8℃ 저장구에서 10일간 저온장해가 전혀 발생하지 않았고 4℃ 저장구에서는 현저히 장해의 진전을 늦추었으나 1℃ 저장 처리구에서의 장해경감 효과는 보이지 않았다. 또한 1-MCP 0.1~1.0μL·L-1 처리구의 경우, 4 및 8℃에서 15일간 저온저장 후 무처리구에 비해 감모율이 낮고 경도가 높게 유지되는 것으로 조사되어 품질적 측면에서 긍정적 효과를 보였다. 드라이아이스(5g/3과)를 이용하여 MAP 가지에 이산화탄소를 처리하였던 경우, 처리 3일 후에 저온장해가 급격히 증가하였고 1-MCP 처리는 장해의 진전을 막지 못하는 것으로 조사되었다. 반면, 가지 과실의 MAP 저장 시 이산화탄소 흡수제(5g/3과)의 단용처리 및 1.0μL·L-1 농도의 1-MCP를 복합처리 하였던 경우, 4 MAP 저장 중 과실의 외부장해는 6일간 전혀 발생하지 않았고 내부장해는 복합처리의 경우 15일간 방지할 수 있었다. 종합적으로 본 연구 결과, 가지 과실에 대한 1-MCP 및 이산화탄소흡수제 처리는 가지 과실의 품질 악화를 지연시키며 유통기간 연장을 위한 저장온도의 범위를 넓혀주는데 실용성이 높다고 판단된다.

The main milling cutter used for typical arthroplastic surgery robot, ROBODC system is 7.8 mm milling cutter. this cutter was used in case of traditional total knee arthroplasty, but 7.8mm milling cutter is not appropriate for newest surgical technique, MIS(minimally invasive Surgery). Generally, cutting method for MIS is tunnel cutting and cutter of cantilever type and small diameter is must be developed for MIS. Generally, Main problem of cutting system is chattering due to vibration of cutter by rotation and numerical analysis using finite element method was used for identifying chattering problems in this study. shaft length, cutter length, diameter and so on were proposed by axis displacement, stress, strain analysis through numerical analysis.