• Proceedings of the Korean Society for Agricultural Machinery Conference
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• 2017.04a
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• pp.149-149
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• 2017

본 논문은 생산라인 자동화를 위한 로봇으로 제조업 시장 확대에 가장 큰 걸림돌이 되는 가격 경쟁력 및 인력난 해소를 위해 설계하였으며 다양한 소재에 대응하기 위해 그리퍼를 교체하여 적용이 되도록 하였다. 자동화를 위한 로봇은 소재의 내외경 가공 및 검사까지 모든 공정이 일괄적으로 이루어 져야하며 LCD 모니터에 생산수량 및 불량률 등의 정보를 실시간으로 나타내어 효율적인 생산계획을 수립할 수 있도록 하였다. 생산라인 자동화를 위해 로봇의 설계는 Auto CAD를 이용하였다. 부품의 가공은 CNC에 적용하기 위해 자동공급장치를 설계하였다. 가공이 완료된 후 측정한 값을 LCD모니터를 통하여 작업자가 알아볼 수 있게 나타냈다. 외경 1은 40.405, 외경2는 32.201, 내경 1은 23.346, 내경 2는 34.302로 나타났다. 측정결과 불량 측정을 위해 측정부의 결과 값이 나타나며 불량이 발생하면 그래프를 이용하여 어떤 부위에서 발생했는지를 알 수 있도록 하였다. 또한 결과 값은 자동으로 저장되도록 하였다. 생산라인 자동화를 위해 100EA를 측정한 결과 외경 1은 40.40438, 외경2는 32.20164, 내경 1은 23.34830 내경 2는 34.30033의 평균값을 나타냈다. 측정값의 검증은 하이트게이지로 측정한 결과 0.003 이내의 결과를 나타냈다. 따라서 본 로봇 자동화 시스템을 적용한다면 생산성 향상 및 불량률 감소가 가능하여 인력대체 및 가격경쟁력이 가능하다고 판단된다.

• Journal of Korean Medical classics
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• v.17 no.4
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• pp.81-88
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• 2004

"황제내경 소문(黃帝內經 素問)" 24권에서 1권이 망실(亡失)되었다. 금각본(金刻本)은 지금 권3에서 권5, 권11에서 권20이 현존하고 있고 1권이 망실(亡失)되고 모두 13권으로 되어 있다. 이 책의 권3앞 페이지의 "황제내경 소문(黃帝內經 素問)" 제목밑에 "국립북평도서관수장(國立北平圖書館收藏)"이라는 도장이 찍혀 있는데, 이는 바로 1949년전에 원래 국립북평도서관(國立北平圖書館)(지금은 북경도서관(北京圖書館)으로 이름을 바꾸었음)에 수장(收藏)되어 있었음을 알 수 있다. 도서관(圖書館)에서는 이 책의 갈피에 다음과 같은 감정(勘定)문자를 적어 놓았다. "황제내경 소문(黃帝內經 素問)24권에서 l권이 망실(亡失)되고 13권이 보존되어 있는데 권3에서 권5까지, 권11에서 권18까지, 권20이다. 망실(亡失)된 편장(篇章)이 있다. 당대(唐代)의 왕빙(王冰)이 주석을 달았다. 금각본(金刻本) 5책(冊)이 있다." 왕빙(王冰)이 편차(編次)하고 주역(註譯)을 단 "소문(素問)"(즉 왕빙본(王冰本))은 모두 24권인데 그 당시에 이미 권7인 "자법론(刺法論)", "본병론(本病論)"이 망실(亡失)된 상태이다. 현존(現存)하고 있는 "소문(素問)" 금각본(金刻本)은 그 분량이 비록 왕빙본(王冰本)의 1/2정도밖에 되지 않지만 양(量)으로 판정할 수 없을 정도로 큰 가치를 가지고 있다. 이 책은 "소문(素問)" 판본학(版本學), 교감학(校勘學) 및 "소문(素問)"석음(釋音)의 연구에 있어서 모두 엄청난 가치를 지닌다. 현존(現存)하고 있는 금각본(金刻本)13권은 "소문(素問)"판본 중에서 가장 오래 된 각본(刻本)이다. 이 책은 비록 중국의서목록(中國醫書目錄)에 기재되어 있지만 중국에서 간행(刊行)된 적이 없고 의서문헌(醫書文獻)을 연구하는 사람들도 이 책에 대하여 알고 있는 사람이 드물다. 금각본(金刻本)과 "중광보주황제내경소문(重廣補注黃帝內經素問)의 가장 다른 곳은 석음(釋音)부분이다. 금각본(金刻本)은 석음(釋音)이 비교적 많고 글자 밑에 훈고(訓詁) 또한 많다. "중광보주(重廣補註)"본(本)은 석음(釋音)이 비교적 적고 글자 밑에 훈고(訓詁)가 거의 없다.

• Journal of Advanced Marine Engineering and Technology
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• v.37 no.5
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• pp.548-556
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• 2013

A tapered production tubing with two different inner diameters has been suggested to increase production rates. In this research, various tapered tubing combinations are taken into account and possible tubing combinations are proposed to satisfy each objective. In previous studies, production enhancement was the main goal. However, this research also considers flow stability by analyzing tubing pressure traverse, liquid holdup, and operating conditions. For a reservoir assumed in this research, a tapered tubing of, 4.5 inch inner diameter(ID) and 2000 ft in length in the lower part and 5.5 inch ID and 8000 ft in the upper part, shows the highest net present value. Compared to a mono tubing, tapered tubings enable various tubing designs because they have smaller differences in frictional pressure loss. It is important to maintain low liquid holdup to prevent liquid loading. Smaller ID of tapered tubing in the lower part enables to achieve the object. In conclusion, it is identified that various tubing designs are achievable from the analyses of overall production operations depending on purposes specified.

• Journal of the Korean Institute of Gas
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• v.12 no.3
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• pp.43-49
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• 2008

The evaporation heat transfer coefficient and pressure drop of R-22 and R-407C in horizontal copper tubes were investigated experimentally. The main components of therefrigerant loop are a receiver, a compressor, a mass flow meter, a condenser and a double pipe type evaporator (test section). The test section consists of a smooth copper tube of 4.3 mm and 6.4 mm inner diameter. The refrigerant mass fluxes were varied from 100 to $300[kg/m^2s]$ and the saturation temperature of evaporator were 5 [$^{\circ}C$]. The evaporation heat transfer coefficients of R-22 and R-407C rise with the increase in mass flux and vapor quality. The evaporation heat transfer coefficient of R-22 for inner diameter tube of 4.3 mm and 6.4 mm is about $7.3{\sim}47.1%$ and $5.68{\sim}46.6%$ higher than that of R-407C, respectively.

• Journal of Biomedical Engineering Research
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• v.23 no.2
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• pp.147-153
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• 2002

The purpose of this study was to evacuate the effect of different types of Poly(lactic-co-glycolic acid) (PLGA) scaffolds on the formation of human auricular and septal cartilages. All of the scaffolds were formed in a tubular shape for potential application for artificial trachea or esophagus with either 110,000 g/mol PLGA. 220,000 g/mol PLGA. or a combination of both. In order to maintain the tubular shape in vivo, two methods were used. One method was inserting polyethylene tube at the center of scaffolds made of 110,000 g/mol PLGA. The other method involved combination of the two different molecular weight PLGA's. The inner surface of tubular shaped scaffold made with 110,000 g/mol PLGA was coated with 220,000 9/mol PLGA to give more mechanical rigidity. Elastic cartilage was taken from the ear of a patient aged under 20 nears old and hyaline cartilage was taken from the nasal septum. The chondrocytes were then isolated. After second passage, the chondrocytes were seeded on the PLGA scaffolds followed by in vitro culture for one week. The cells-PLGA scaffold complex were implanted subcutaneously on the back of nude mice for 8 weeks. The tissue engineered cartilages were separated from nude mice and examined histologically after staining with the Hematoxylin Eosin. The morphology of the scaffolds were examined by scanning electron microscopy. The pores were well formed and uniformly distributed in the various PLGA scaffolds. After 8 weeks in vivo culture, cartilage was well formed with 110,000 g/mol PLGA. however lumen had collapsed. In contrast. a minimal amount of neocartilage was formed with 220,000 g/mol PLGA, while the architecture of scaffold and lumen were well preserved. Elastic cartilage formed more neocartilage than hyaline. Hyaline and elastic neocartilage were well formed on 110,000 g/mol PLGA with the polyethylene tube, exhibiting mature chondrocytes and preservation of the tubular shape. It was found that 110,000 g/mol PLGA was more appropriate for cartilage formation but higher molecular weight polymer was necessary to maintain the three dimensional shape of the scaffold.

• Journal of Korean Medical classics
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• v.18 no.2 s.29
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• pp.213-228
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• 2005

${\ulcorner}$재(在)${\ulcorner}$황제내경(黃帝內經)${\lrcorner}$중(中)${\ulcorner}$음양응상대론(陰陽應象大論)${\lrcorner}$여(與)${\ulcorner}$오운행대론(五運行大論)${\lrcorner}$소언급적(所言及的)‘동방생풍(東方生風) 풍생목(風生木) 목생산(木生酸) 산생간(酸生肝)’, 시설명관어간발생적문장(是說明關於肝發生的文章). 간장혈시간지발생학특성중속산생간(肝臧血是肝之發生學特性中屬酸生肝), 즉종음식소공응적음형물질전화위양기적생리현상(卽從飮食所供應的陰形物質轉化爲陽氣的生理現象), 간적저장혈액공능가시위수곡지기적산미적작용(肝的貯藏血液功能可視爲水穀之氣的酸味的作用). 간적발생논설명천지지조합작용시인류적생성근본인소(肝的發生論說明天地之調合作用是人類的生成根本因素). 설명재천지육기화지지오행중개입오미(說明在天之六氣和地之五行中介入五味), 기가생성인류(旣可生成人類). 종이재차가이확인관우인류발생지(從而再次可以確認關于人類發生之)‘천지합기명왈인(天地合氣命曰人)’적함의(的含意). 간적발생원리설명료간시통과무극(肝的發生原理說明了肝是通過無極), 태극(太極), 음양급소생성적육기화오행상조합이생성적(陰陽及所生成的六氣和五行相組合而生成的), 저일점확인료차위양화기(這一點確認了此爲陽化氣), 음성형적과정(陰成形的過程), 시설명우주만물화인류생성적근본원리(是說明宇宙萬物和人類生成的根本原理).

• Investigative Magnetic Resonance Imaging
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• v.15 no.1
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• pp.41-47
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• 2011

Purpose : To evaluate the cause of internal jugular vein (IJV) obstruction on contrast enhanced 3D MR angiography (CE-MRA) using contrast enhanced computed tomography (CE-CT). Materials and Methods : A total number of 30 patients were enrolled, who underwent both head and neck CE-MRA and CE-CT from 2005 to 2008. We defined obstruction group which had IJV obstruction and control group which had no IJV obstruction on CE-MRA. The following parameters were measured from axial images of CE-CT: 1) diameter of IJV; 2) distance between the styloid process and ipsilateral lateral mass of the atlas; 3) maximum area of lateral mass of the atlas. Each parameter was compared between obstruction group and control group. Results : The diameter of IJV and distance between the styloid process and lateral mass of the atlas at IJV obstruction side in obstruction group were $1.6{\pm}1.0\;mm$ and $4.1{\pm}2.1\;mm$ respectively, which resulted in statistical significance (p<0.01). The maximum area of lateral mass of the atlas at IJV obstruction side in obstruction group was $103.4{\pm}25.3\;mm^2$ which is significantly larger than in control group (p<0.05). Conclusion : We found that the cause of IJV obstruction on CE-MRA could be narrow space between the styloid process and the lateral mass of the atlas, which was related with asymmetric larger area of lateral mass of atlas.

• Journal of Nuclear Fuel Cycle and Waste Technology(JNFCWT)
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• v.13 no.1
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• pp.55-61
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• 2015

When a radiation detector is applied to the measurement of the radioactivity of high-level of radioactive materials or the rapid response to the nuclear accident, several collimators with the different inner radii should be prepared according to the level of dose rate. This makes the in-situ measurement impractical, because of the heavy weight of the collimator. In this study, an IRIS collimator was developed so as to have a function of controlling the inner radius, with the same method used in optical camera, to vary the attenuation ratio of radiation. The shutter was made to have the double tungsten layers with different phase angles to prevent the radiation from penetrating owing to the mechanical tolerance. The performance evaluation through the MCNP code was conducted by calculating the attenuation ratio according to the inner radius of the collimator. The attenuation ratio was marked on the outer scale ring of the collimator. It is expected that when a radiation detector with the IRIS collimator is used for the in-situ measurement, it can change the attenuation ratio of the incident photon to the detector without replacing the collimator.

• Journal of Yeungnam Medical Science
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• v.6 no.2
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• pp.91-101
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• 1989

The goal of therapy in patients with traumatic carotid-cavernous fistulas is to occlude the fistula, preferably while maintaining the carotid blood flow. Since the introduction of the concepts of detachable balloon technique to occlude arteriovenous fistulas, the technique has become the treatment of choice in the management of traumatic carotid-cavernous fistulas. The major symptoms of traumatic CCFs are (1)pulsating exophthalmos, (2)orbital and cephalic bruit and murmur, (3) headache, (4) chemosis. (5) extraocular palsies, and (6) visual failure. Traumatic CCFs are combined with multiple associated lesions. We tried the occlusion of fistulas using Goldvalve balloons in 8 consecutive cases of traumatic CCF and the result of our experience is reported. Transarterial approach with manually-tied latex balloons is tried in all cases and the fistulas was successfully occluded in all cases. In 5 cases. the internal carotid artery was preserved and the arterial lumen was occluded along with fistula opening in :3 cases. In one case, surgical ligation was done because of symptoms recurred and incomplete occlusion of fistula. We experienced hemiparesis as a major complication in one case during occlusion tolerance test, which was remitted spontaneously. The results of Debrun balloon treatment were relatively excellent. We consider that the first choice of treatment of traumatic CCF is occlusion of the fistula by a detachable balloons.

• The Korean Journal of Nuclear Medicine
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• v.29 no.1
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• pp.22-30
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• 1995

To predict preoperatively the safety of permanent occlusion of an internal carotid artery with $^{99m}Tc$-HMPAO brain single photon emission computed tomography(SPECT) from an objective point of view, Twenty-four patients underwent balloon test occlusion (BTO) of the internal carotid arteries because of neck and skull base tumors. The authors assessed the uptake of both middle cerebral artery territories before and during BTO with $^{99m}Tc$-HMPAO brain SPECT using semiquantitative analysis method and compared the results with other factors(neurologic examination, arterial stump pressure and electroenceph-alogram). Nineteen patients had not experienced neurological deteriorating or any problem during BTO. Their comparative uptakes of the middle cerebral artery territories were 95 to 101% of the pre-BTO state. The remaining five patients showed severe neurologic symptoms such as transient hemiplegia and unconsciousness. Their comparative uptake of the middle cerebral artery territories were 77 to 85% of the pre-BTO state, and were well matched with other factors. $^{99m}Tc$-HMPAO brain SPECT before and during BTO seems to be a simple and objective method for prediction of permanent neurologic deficits when the comparative uptake of middle cerebral artery territories during BTO is lower than 85% of that before BTO.