• Journal of the Korean Institute of Landscape Architecture
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• v.26 no.1
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• pp.51-58
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• 1998

The opening of an event in a given geographical area may be defined as an innovation. Visitors to the event adopt the innovation; therefore, their visitation patterns since the opening can be regarded as a diffusion process. Bass' model of diffusion process was applied to analyzing weekly visitation of Kwang-ju Viennale. Parameters of the Bass' model were estimated by regression analysis, and then reviewed in terms of applicability. Actual estimation of event visitation was implemented by calculation of the three parameters of the model based on the actual data. After comparing estimated value with actual value, it was concluded that Bass' model is applicable to estimating event visitation as far as it is the only prediction method available at this point.

• Proceedings of the KOR-KST Conference
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• 1993.07a
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• pp.99-105
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• 1993

This Article analyses the present situation of Shanghai Harbour and the Harbour's important role in the development of chinese economy. The article forecasts that the yearly tonnage turnover of the port will reach about 200 million tons in the year of 2000, possibly reach to 270--300 million tons by the end of 2020. it also forecasts that the container handling capacity of the port will be 2 million TEUS in 2000 and 6 million TEUS in 2020 respectively. In order to keep pace with the present situation of opening up and developing Pudong new area, this article suggests that the strategic target of the management and development of Shanghai Harbour should be : grasp the opportunity of opening up and developing Pudong, take the building of the deep-waterway port as the main task, which can accept the third or fourth generation international container ships, bring into full play the traditional advantages the Harbour has, unfold the businesses in other fields, participate in the marketing competition, speed up the development of the Harbour itself, make efferts to build Shanghai Harbour into a port-industry-trade-transportation integral modernized international deep-water key port.

• Journal of the Korean Society of Safety
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• v.7 no.4
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• pp.63-71
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• 1992

Generally, Web & Flange of I shape beam are composed of plane for optimization of measurement in investigating the behavior resistant to horizontal force and bending moment on large section Therefore, longitudinally traperzoidal web section beam has an important function as a body for carrying more load and ensuring more support area. There is only a limited usefulness for analyzing the behavior of web section with opening. It is experimentally verified that this traperzoidal web section has a good resistant caopacity. conclustions on the above research results are as follows : 1) resistant capacity on the above can be more 15% increased than normal case 2) stiffener welding work and complexity of shopdrawing can be excluded in advance 3) traperzoidal section can be applied in structural practice.

• Transactions of the Korean Society of Mechanical Engineers A
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• v.29 no.11 s.242
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• pp.1455-1462
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• 2005

In this paper, we intend to introduce a nonlinear finite element method based on the fully nonlinear potential flow theory in order to simulate the large amplitude sloshing flow in two-dimensional baffled tank subject to horizontally forced excitation. The free surface is tracked by a direct time differentiation scheme with the four-step predictor-corrector time integration method. The flow velocity is accurately recovered from the velocity potential by second-order least square method. In order to maintain the finite element mesh regularity and total mass, the semi-Lagrangian surface tracking method with area conservation is applied. According to the numerical formulae, we perform the parametric experiments by varying the installation height and the opening width of baffles, in order to examine the effects of baffle on the nonlinear liquid sloshing. From the numerical results, the hydrodynamic characteristics of the large amplitude sloshing are investigated.

• Journal of Chest Surgery
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• v.21 no.3
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• pp.567-573
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• 1988

Coarctation of the aorta is classically a congenital narrowing of the upper descending thorac aorta adjacent to the site of attachment of the ductus arteriosus which is sufficiently severe that there is a pressure gradient across the area. Recently we have experienced two cases of coarctation of the aorta and successfully performed resection of the sites of coarctation and end to end anastomosis of the aorta. The first case was a juxtaductal type of coarctation of the aorta with PDA and the pathology of the lesion was a diaphragm with central narrow opening. And the resection length was about 0.5cm and aortic clamping time was 20 minutes. The second case was also juxtaductal type coarctation of the aorta with mild tubular hypoplasia of aortic isthmus, left SVC and the pathology was also a diaphragm with central narrow opening. And the resection length was about 0.5cm and aortic clamping time was 29 minutes. Both postoperative course was uneventful and the patients were discharged two weeks after operation.

• Proceedings of the Korean Society for Agricultural Machinery Conference
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• 1993.10a
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• pp.761-767
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• 1993

A precision planting system using computer controlled technology for mulching cultivation was developed and tested . The system consisting of a micro-computer, several optical fiber sensors and control actuators realized the mechanization of the precision planting operation. The film hole positions, existences of a seed on shutter were detected and the planting speed was measured. The shutter opening mechanism and a seed metering device driven by a stepping motor were controlled, automatically . The planting timing of the shutter opening mechanism were analyzed from a video camera motion analysis, theoretically. The results showed a sufficient accuracy of a seed planted into the center a film hole with a variety of planting speeded. The gravity point positions in film hole of seeds planted by the system just were within the area of +-5mm of the hole center when the hole diameter was 40mm.

• Journal of the Korean Society for Precision Engineering
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• v.15 no.2
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• pp.134-145
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• 1998

The purpose of this paper is to construct a computer simulation system which can analyze and design the hydraulic excavator Theoretical analyses are performed on the hydraulic circuit and attachment of excavator with load sensing system. Databases are constructed for control valve opening areas, horsepower control and for load sensing regulator. For hydraulic components modularized programming techniques are applied which is expected to be utilized for software development of fluid power system. Through simulation an information of any point in hydraulic circuit can be obtained.

• Korean Journal of Veterinary Research
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• v.39 no.5
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• pp.961-964
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• 1999

A six-month-old, male mongrel dog presented with wet ventral abdominal skin hairs and a short prepuce with penis. In physical examination, the penis was underdeveloped with fusion failure of the prepuce and the urethral opening was in the transitional area between os penis and perineal region. The radiological shape of urinary bladder was normal in positive contrast cystography and there was no any other routes except the observed urethral opening. Cryptochidism was also shown. It was diagnosed as hypospadia. Treatment included castration and resection of remnants of the prepuce and penis.

• Journal of Oral Medicine and Pain
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• v.9 no.1
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• pp.51-64
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• 1984

In order to obtain the basic data of movements of the mandible for diagnosis and prgnosis determination of the TMJ dysfunction, the author measured the ranges and shapes of movements of the mandibule in the frontal, sagittal and horizontal trajectory with Saphon Visi-Trainer C-Ⅱ(Tokyo Shizaisha Inc.) in 61 men. The subjects who were undergraduate and graduate students of the School of Dentistry, Seoul Nationa University(SNU) had no pain or symptoms of dysfunction of the masticatory system. The obtained results were as follows: 1. The mean for maximal right and left laterotrusion in the frontal trajectory were 11.3 mm and 10.9mm, respectively and didn't differ significantly. Right and left larero-opening at 15mm, 25mm and 35mm mouth opening respectively didn't differ significantly. Area of border movement of the mandible was 770.33㎟. 2. The mean for maximal protrusion in the sagital trajectory was 10.2mm, antero-posterior deviation between ICP and RCP 1.2mm and angel of maximal protrusion and horizontal plane 20.5。. 3. The mean for right and left laterotrusion is 11.1mm &11.2mm,respectively, and didn't diffef significantly.

• Journal of the Korean Vacuum Society
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• v.4 no.3
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• pp.275-282
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• 1995

III족 원료 가스로 triethylgallium(TEGa)과 trimethylindium(TMIn)을 사용하고 V족 원료 가스로 사전 열 분해하지 않은 arsine(AsH3)과 monoethylarsine(MEAs)을 사용하여 ultrahigh vacuum chemical vapor deposition(UHVCVD)법으로 Si3N4로 패턴된 GaAs(100)기판 위에 GaAs와 InGaAsqkr막을 선택적으로 에피택시 성장을 하였다. V족 원료 가스를 사전 열 분해하지 않으므로 넓은 성장 온도 구간과 V/lll 비율에서도 선택적으로 박막이 성장되었다. 또한 선택 에피택시의 성장 메카니즘을 규명하기 위하여 다양한 filling factor(전체면적중 opening된 면적의 비율)를 가지는 기판을 제작하여 성장에 사용하였다. UHVCVD법에서는 마스크에 면적중 opening된 면적의 비율)를 가지는 기판을 제작하여 성장에 사용하였다. UHVCVD법에서는 마스크에 입사된 분자 상태의 원료 기체가 탈착된 후 표면 이동이나 가스 상태의 확산과정 없이 마스크로부터 제거되므로 패턴의 크기와 모양에 따른 성장 속도의 변화나 조성의 변화가 없을 뿐만 아니라 chemical beam epitaxy(CBE)/metalorganic molecular beam epitaxy(MOMBE)법에서 알려진 한계 성장온도 이하에서 선택 에피택시 성장이 이루어졌다.