Chained form의 제어와 특이점에 관한 연구

남택근(Nam Taek-Kun),노영오(Roh Young-Oh),오세준(Oh Se-Jun) 한국마린엔지니어링학회 2007 한국마린엔지니어링학회 학술대회 논문집 Vol.2007 No.-

A nonholonomic system can be derived from velocity and acceleration constraints which is not integrable. It was interesting object since the nonhlonomic system cannot be stabilized its equilibrium points by time-invariant and continuous controller. In this paper, chained transformation procedure which is a method to control nonholonomic system and singularity occurred during its transformation were introduced.

제올라이트를 함유한 부분활성화된 PAN복합체 섬유의 제조에 관한 연구

오원진,설용건,정경택,문제권,황덕근,이화섭 한국화학공학회 1998 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.36 No.5

아크릴로니트릴모노머를 전구체로하여 제올라이트를 함유한 부분활성화 PAN 복합체 섬유를 제조하였다. 중량평균 분자량 630,000이고, 다분산지수가 1.30인 방사 dope를 건습식 방사법(dry-jet wet spinning technique)으로 방사하였다. 제올라이트를 함유한 35-40㎛ 두께의 PAN섬유는 건습열 연신과정을 통해 배향도가 증가되었다, 같은 조건에서 얻어진 PAN섬유에 비하여 제올라이트를 함유한 PAN 복합체 섬유는 89%의 인장강도를 나타내었다. 고리화와 부분활성화 상태는 적외선분광 분석법과 X선회절 분석법을 이용하여 확인하였다. PAN 섬유의 부분활성화 이후에도 제올라이트의 함유에 따른 특성 피이크를 X선회절 분석법을 이용하여 확인할 수 있었다. 제올라이트를 함유한 PAN 복합체 섬유는 새로운 유무기 복합 흡착제로 사용을 기대할 수 있을 것으로 사료된다. Partially activated polyacrylonitrile(PAN) composite fiber containing zeolite particle was prepared by using acrylonitrile(AN) as a precursor. Weight average molecular weight(Mw) and polydispersity index of spinning dope was 630,000 and 1.30 respectively. Dry-jet wet spinning technique was used for making PAN composite fiber. During, the dry-jet wet spinning process, PAN composite fiber of 35-45㎛ in diameter shows increased orientation. Initial elastic modulus of PAN composite fiber containing zeolite particles was 89 % of PAN fiber at the same experimental condition. The cyclization and activated state of PAN fiber were conformed by Fourier transform infrared(FT-IR) spectroscopy and X-ray diffraction(XRD). After the activation process, characteristic peaks of PAN composite fiber could be observed due to the incorporation of zeolite particles from XRD. Partially activated PAN composite fiber containing zeolite particles is expected to use as an organic-inorganic composite absorbent.

항문부 암성동통에 대한 지주막하(蜘蛛膜下)10 % Phenol-Glycerine 차단

오흥근,남용택,이예철 대한마취과학회 1979 Korean Journal of Anesthesiology Vol.12 No.4

Phenol-glycerine subarachnoid blocks were performed in 5 patients, who had intractable perianal pain from postoperative rectal csncer. An initial diagnostic subarachoid block with 0. 25 ml of 0.5% tetracaine in 10% glucose through L 5-S 1 was performed with the patient in a sitting position tilted about 15 degree to the affected side. After evaluation of the test block, the following day a therapeutic block was undertaken by injecting 0. 15-0. 2 ml of 10% phenol-glycerine. Excellent relief occured in all cases and in one of them the repeated block for recurrent pain was done and 5 months after the first block. One case required of successive blocks 3 times during 8 days with the old phenol glycerine solution over 1 year. Life duration ranged from days to more than 12 months after the blocks. As to complication, dysuria developed temporarily in 3 cases. The one-sided saddle block with 10% phenol glycerine for perianal cancer pain is remarkably safe as well as effective and should be employed more frequently.

상지 외전립에서 시행한 쇄골상 상완신경총차단

오흥근,김성열,김동권,박욱,임권,임화택 대한마취과학회 1980 Korean Journal of Anesthesiology Vol.13 No.2

With the arm in hyperabduction, we have carried out 525 procedures of supraclavicularbrachial plexus block from Aug. 1976 to June 1980, whereas block with the arm in adduction has been customarily performed by other authors. The anesthetic procedure is as follows: 1) The patient lies in the dorsal recumbent position without a pillow under his head or shoulder. His arm is hyperabducted more than a 90 degree angle from his side, and his head is turned to the side opposite from that to be blocked. 2) An $quot;X$quot; is marked at a point 1 cm above the mid clavicle, immediately lateral to the edge of the anterior scalene muscle, and on the palpable portion of the subclavian artery. The area is aseptically prepared and draped. 3) A 22 gauge 3. 5cm needle attached to a syringe filled with 2% lidocaine (7~8mg/kg of body weight) and epineprine(1: 200,000) is inserted caudally toward the second portion of the artery where it crosses the first rib and parallel with the lateral border of the muscle until a paresthesia is obtained. 4) Paresthesia is usually elicited while inserting the needle tip about 1~2 cm in depth. If so, the local anesthetic solution is injected after careful aspiration. 5) If no paresthesia is elicited, the needle is withdrawn and redirected in an attempt to elicit paresthesia. 6) If, after several attempts, no paresthesia is obtained, the local anesthetic solution is injected into the perivascular sheath after confirming that the artery is not punctured. 7) Immediately after starting surgery, Valium is injected for sedation by the intravenous route in almost all cases. The age distribution of the cases was from 11 to 80 years. Sex distribution was 476 males and 49 females(Table 1). Operative procedures consisted of 103 open reductions, 114 skin grafts combined with spinal anesthesia in 14, 87 debridements, 75 repairs, i.e. tendon(41), nerve(32), and artery(2), 58 corrections of abnormalities, 27 amputations above the elbow(5), below the elbow(3) and fingers(17), 20 primary closures, 18 incisions and curettages, 2 replantations of cut fingers respectively(Table 2). Paresthesia was obtained in all cases. Onset of analgesia occured within 5 minutes, starting in the deItoid region in almost all cases. Complete anesthesia of the entire arm appeared within 10 minutes but was delayed 15 to 20 minutes in 5 cases and failed in one case. Thus, our success rate was nearly 100%. The duration of anesthesia after a single injection ranged from 3½, to 4¹/² houre in 94% of the cases. The operative time ranged from 0.5 to 4 hours in 92.4% of the cases(Table 3). Repeat blocks were carried out in 33 cases when operative times which were more than 4 hours in 22 cases and the others were completed within 4 hours(Table 4). Two patients of the 33 cases, who received microvasular surgery were injected twiee with 2% lidocaine 20ml, for a total of 13½ hours. The 157 patients who received surgery on the forearms or hands had pneumatic tourniguets (250 torrs) applied without tourniquet pain. There was no pneumothorax, hematoma or phrenicve paralysis in any of the unilateraI and 27 bilateral blocks, but there was hoarseness in two, Horner's syndrome in 11 and shivering in 7 cases. No general seizures or other side effects were observed. By 20ml of 60% urografin study, we confirm ed the position of the needle tip to be in a safer position when the arm is in hyperabduction than when it is in adduction. And also that the humoral head caused some obstraction of the distal flow of the dye, indicating that less local anesthetic solution would be needed for satisfactory anesthesia. (Fig. 3,4)

‘Pink Melody’- A High-yielding Standard Gerbera Cultivar with Pink, Semi-Double Flowers

Jong Taek Park,Oh Keun Kwon,Jae A Jeong,Sang Kun Park 한국화훼학회 2018 화훼연구 Vol.26 No.3

국립원예특작과학원에서 2011년 거베라 신품종 ‘Pink Melody’를 육성하였다. ‘Pink Melody’는 2007년 10월부터 2007년 12월까지 분홍색 반겹꽃 ‘Eta’와 ‘Pascal’을 교배하여 획득한 97개체의 실생계통으로부터 2008년부터 2011년까지 4년 동안의 개화 및 생육특성검정을 거쳐 선발된 절화용 대륜 거베라 품종이다. ‘Pink Melody’는 초세강건한 녹색화심의 파스텔톤 분홍색(RHS R55D) 반겹꽃 대륜계 품종이다. 꽃은 평균 직경이 11.4±0.9cm이고, 내부설상화와 화반의 직경은 각각 7.3±0.8cm와 2.6±0.5cm, 외부 설상화의 길이와 폭은 각각 5.3±0.4cm와 1.0±0.1cm로 꽃잎이 비교적 좁고 긴 도란형이다. 꽃대는 꽃목직경이 상부 4.2±0.4mm, 중부 6.4±0.8mm 정도로 강건하며, 꽃대의 길이는 45.2±5.5cm이다. 절화수명은 10.8±1.6일로 대조품종 ‘Pascal’보다 약 1.5일이 길며, 연간 채화량은 52.9±4.3본/주로 대조품종보다 5.0본/주 많은 다수성 품종이다. A new gerbera cultivar named ‘Pink Melody’ was bred by the National Institute of Horticultural and Herbal Science, Korea, in 2011. The pink-flowered cultivar ‘Eta’ was crossed with ‘Pascal’ during October – December 2007. Among the 97 offsprings from this cross, ‘Pink Melody’ was selected particularly for its use as a cut flower following a phenotypic characteristics’ survey carried out from 2008 to 2011. ‘Pink Melody’ is a vigorous standard gerbera cultivar with light pink flowers (RHS R55D) and green central disc florets. It has semi-double flowers, with an average diameter of 11.4 ± 0.9 cm and inner ray floret and disc floret diameters of 7.3 ± 0.8 cm and 2.6 ± 0.5 cm, respectively. It has a thick peduncle, 4.2 ± 0.4 mm wide in the upper part and 6.4 ± 0.8 mm wide in the middle part, with an average peduncle height of 45.2 ± 5.5 cm. The vase life of ‘Pink Melody’ is 10.8 ± 1.6 days and its average per plant flower yield is 52.9 ± 4.3 stems, which are 1.5 days longer and 5.0 stems more than that of the standard cultivar (‘Pascal’), respectively.

비 간섭 슬라이딩 모드 기법을 이용한 로봇 매니퓰레이터의 궤도제어

남택근(Taek-Kun Nam),노영오(Young-Oh Roh),안병원(Byung-Won Ahn) 대한기계학회 2004 대한기계학회 춘추학술대회 Vol.2004 No.11

In this paper, we proposed the decoupling VSS controllers for n trajectory control of n two degrees of freedom SCARA type manipulator. We decoupled the position and velocity of n manipulator tip by using a nonlinear error functions. The reference inputs of the controller can be decided directly from the desired position and velocity. Simulation result is provided to verify the effectiveness of the proposed control scheme.

교통사고 발생에 관한 조사연구

이장근,심운택,오장균 충남대학교 의과대학 지역사회의학연구소 1991 충남의대잡지 Vol.18 No.2

To investigate epidemiologic characteristics of traffic accident incidence, the author analyzed randomezed sampled 541 accident victims for 1 year from Jan. 1990 and Dec. 1990. The results were as follows: 1. Kind of vehicles were sedan(53.6%), truck(17.4%), microbus(14.4%), bus(9.1%) and autobicycle (5.5%) in decending order. 2. The proportion of TA ownes to disobey of safety duty was high among the groups of age forties, middle school educated, 4-5yrs carrier, in spring, on monday, at 12-19 hours time, at domestic area, truck, car to others, snowy or rainy weather, at cross road and at curve road. 3. The proportion of TA ownes to over speed was high among the groups of age forties, elementary school educated, 6-10yrs carrier, in summer, on sunday, at 04- 11 hours time, at agricultural area, microbus, car to man, cloudy weather, at cross way and at straight road. 4. The proportion of TA ownes to drinking was high among the groups of age thirties, high school educated, 6-l0hrs carrier, in winter, on saturday, at 20-03 hours time, at agricultural area, microbus, car to car, cloudy weather, at cross walk way & at curve road. 5. Head trauma & multiple organ injuries were high in drnking induced TA & fracture was high in the groups of disobey of safety walking. 6. Head trauma, multiple organ injuries & fracture were high in the group of over speed 60km/hr more over. 7. Head trauma & fracture were high in the group of bicycle rider & multiple organ injuries was high in the group of autobyicycle rider. 8. Average treatment periods was signigicantly long among the group of drinking or overspeed induced TA & autobyicycle rider.

속도구속조건을 이용한 수중 이동체의 접안제어

남택근(Taek-Kun Nam),김철승(Chol-Seong Kim),노영오(Young-Oh Roh),박영산(Young-San Park) 한국항해항만학회 2004 한국항해항만학회 학술대회논문집 Vol.3 No.-

본 논문에서는 속도 구속조건을 갖는 수중이동체를 초기위치로부터 목적위치에 접안하는 제어기법에 대해서 논의한다. 단, 수중이동체는 일정방향으로 속도성분을 갖지 않는 즉, 속도구속조건을 가지는 것으로 가정한다. 본 논문에서는 이러한 시스템에 대하여 비 홀로노믹적인 관점에서 시스템을 해석하고 수중이동체를 체인드폼으로 변환한 후 Multi-rate 디지털 제어기법를 적용하여 자세제어를 행하고 수치시뮬레이션을 통하여 제어기법의 유용성을 평가하였다. In this paper, we study the stabilization control of an underwater vehicle from its initial posture to its desired one. We assume that the underwater vehicle has velocity constraint, i.e. it has no velocity component for some direction. Our approach is based on the nonholonomic system which can derived from velocity constraints that cannot integrable. We proposed a control strategy for posture control of the underwater vehicle using multi-rate digital control. The proposed control scheme is applied to the berthing control of an underwater vehicle and verified the effectiveness of control strategy by numerical simulation.

선박의 진동 계측 프로그램 개발에 관한 연구

남택근(Taek-Kun Nam),이돈출(Don-Chul Lee),노영오(Young-Oh Roh) 한국마린엔지니어링학회 2008 한국마린엔지니어링학회 학술대회 논문집 Vol.2008 No.-

본 연구에서는 선박의 진동계측을 위한 프로그램 개발에 대해 언급하고자 한다. 선박에서는 선체진동 및 엔진과 관련 회전기기의 진동을 계측하여 선박의 안전성을 평가하고 엔진과 부속장비에 대한 운전 상태를 분석하게 된다. 이를 위해서는 진동 계측이 필요하고 본 연구에서는 이러한 진동계측 시스템을 경제적이고 콤팩트하게 구성할 수 있는 방법을 제시 및 개발하였다. 개발된 프로그램을 선박 내 거주공간의 진동계측에 활용하였고, 실험을 통하여 진동계측 시스템의 유용성을 확인할 수 있었다. In this paper, a development of vibration measurement program for ships is discussed. Hull vibration and engine vibration were measured to analyze ships safety and to evaluate the operating conditions of engine. Some vibration measurement system is needed to analyze safety or operating conditions of rotating machineries. A vibration measurement system which has compactness and economic feasibility is developed in this research. Developed program is applied to measure the vibration signal in living space of ship and verified the usefulness of the vibration measurement system.

선박의 진동 계측 프로그램 개발에 관한 연구

남택근(Taek-Kun Nam),이돈출(Don-Chul Lee),노영오(Young-Oh Roh) 한국항해항만학회 2008 한국항해항만학회 학술대회논문집 Vol.2008 No.공동학술

본 연구에서는 선박의 진동계측을 위한 프로그램 개발에 대해 언급하고자 한다. 선박에서는 선체진동 및 엔진과 관련 회전기기의 진동을 계측하여 선박의 안전성을 평가하고 엔진과 부속장비에 대한 운전 상태를 분석하게 된다. 이를 위해서는 진동 계측이 필요하고 본 연구에서는 이러한 진동계측 시스템을 경제적이고 콤팩트하게 구성할 수 있는 방법을 제시 및 개발하였다. 개발된 프로그램을 선박 내 거주공간의 진동계측에 활용하였고, 실험을 통하여 진동계측 시스템의 유용성을 확인할 수 있었다. In this paper, a development of vibration measurement program for ships is discussed. Hull vibration and engine vibration were measured to analyze ships safety and to evaluate the operating conditions of engine. Some vibration measurement system is needed to analyze safety or operating conditions of rotating machineries. A vibration measurement system which has compactness and economic feasibility is developed in this research. Developed program is applied to measure the vibration signal in living space of ship and verified the usefulness of the vibration measurement system.