• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 1989년도 한국자동제어학술회의논문집; Seoul, Korea; 27-28 Oct. 1989
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• pp.87-92
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• 1989

An autopilot for the class of Bank-To-Turn missiles is developed using a multivariable plant model & control design methodology. The roll-pitch-yaw cross coupling is included in the design considerations. Feedback system is designed using the Linear Quadratic Gaussian with Loop Transfer Recovery (LQG/LTR). Nonlinear simulations are presented to demonstrate the performances of the designed system.

• 한국주조공학회지
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• 제26권4호
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• pp.184-190
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• 2006

Presence of inclusions in Ti castings imparts detrimental effects on the mechanical performance of castings. However, actual inclusions do not occur very frequently and they are difficult to locate. As a result, acquirement of specimens for mechanical tests and thus in-depth research of the adverse influence of inclusions are challenging. To address this problem, artificial inclusion seeding methodology is developed to emulate actual inclusions in Ti investment castings. Firstly, to validate that this new methodology does not result in inherent mechanical property degradation, Ti specimens with machined, backfilled and HIPed holes are produced and compared to control (unaltered), cast Ti material. Fatigue test results indicate that this 'machine-and-HIP methodology without seeding' does not result in any fundamental mechanical property alteration, which would bias ensuing comparative results. Secondly, based on this result, validation of the artificially seeded inclusions being equivalent to 'as cast' inclusions is performed by comparing their fatigue behaviors. Test specimens created by the novel artificial inclusion seeding methodology are equivalent to Ti casting specimens containing actual cast-in inclusions, and an adverse effect of inclusions in investment castings is confirmed.

• 지적과 국토정보
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• 제46권2호
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• pp.325-340
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• 2016

Dangermond(2009)에 의해 GIS의 다음 패러다임으로서 제시된 Geodesign은 공간계획 및 설계의 바탕이 된다. 또한 고재용(2015)은 공간정보를 기초로 하여 진행되는 조경설계의 관점에서 Geodesign 방법론을 제시하였다. 그러나 그의 방법론은 효율성 향상을 위한 연구인 반면 Geodesign의 한계점이자 공간설계의 핵심인 '창의성 지원'은 다루지 못하였다. 이러한 문제점을 보완하기 위해서는 공간설계의 관점에서 전 과정에 대한 정보를 효과적으로 다룰 수 있도록 지원하는 개념으로써 개념화를 통해 $7{\pm}2$ 개라는 인간의 인지능력의 한계를 극복해야 한다. 따라서 본 논문에서는 그러한 한계점을 극복하고자 조경설계 분야의 사용자에게 더 나은 경험을 제공하기 위해 인간의 인지능력한계 극복과 그것을 통한 창의성 향상을 목표로 연구를 진행하였다. 선행연구의 고찰을 통해 창의성 향상을 위한 방안을 도출하였으며, 이 방안을 바탕으로 창의적 공간설계의 지원이 가능한 Geodesign 방법론을 제시하였다. 제시된 방법론의 과정을 수행하기에 가장 적합하다고 판단된 ESRI사의 GeoPlanner for ArcGIS에 방법론을 적용하여 Interface 설계의 과정을 수행하였다. 먼저 스크립트를 작성하고 기능요소와 정보요소를 판단하여 Interaction을 도출하였고, 도출된 Interaction을 바탕으로 Interface 설계를 진행하였다. 창의성 향상이라는 것은 물리적으로 증명하기는 어려운 부분이다. 그러나 Interface 설계를 통해 잠재의식 속에 있던 새로운 질서를 찾아내어 개념화를 통한 창의적 지원이 가능하며, 순간적으로 떠오르는 아이디어를 놓치지 않고 표현하여 인지능력의 한계를 극복할 수 있는 환경을 제안하였다.

• Journal of Information Technology Applications and Management
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• 제10권1호
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• pp.91-110
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• 2003

The primary goal of this paper is to develop an evaluation model for Web site design that have substantial effects of the performance of marketing and promotion of goods and services of the company. This paper proposes 3 design aspects such as dosing concepts, usability, and artistic coordination. The model also have tested its applicability to real world examples through an appropriate statistical techniques. Then, the model has been actually applied into 6 typical web sites and their design problems are thoroughly investigated and compared each other. Several web site design guidelines are also proposed for web design practitioners.

• 대한조선학회지
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• 제18권4호
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• pp.31-40
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• 1981

Nowadays we needs the ship design ability strongly for our shipbuilding industry to attain the 2nd position among the competitive world marine industries. But we have short experience in ship design, so several ship design terminologies are used without clear understandings. Here, papers on ship design procedure and design methodology are summarized with some investigation about our present status. In addition, the state arts and new developments of Computer Aided ship Design in advanced ship building countries are treated. It is hoped that we-ship designers of our country-do have common understandings about the ship design terminologies.

• 대한건축학회논문집:계획계
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• 제34권5호
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• pp.129-138
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• 2018

The purpose of this study is to analyze and evaluate the significance of undulated planes of architectural landscape methodology, to assess if the methodology had potential to be a sustainable architectural model, to be experimented in future. To achieve this purpose, the historical origins and changes of the landscape is discussed to analyse how it influenced modern architecture. Then the effects of panoramic sensibility derived from the picturesque garden is analysed to evaluate the influence it had on the change of the perception of space and modern architecture and landscape design strategy. Then 1980s and 1990s' symposiums and landscape theories are examined. To find pivotal moment of merging landscape and architecture, the design schemes of Bernard Tchumi and OMA for La Villette competition are selected as manifestations to show co-existence of landscape and architecture. Afterwards Yokohama ferry terminal is analyzed to present the undulated planes deployed for the union of landscape and architecture, to the affect of uninterrupted spatial connectivity. The impact of undulated plane on interior is explored in analysis of Rolex Learning Center, consequently changing the relationship within functions of the interior and the role of circulation. Finally, the spatial characteristics and significance of undulated plane is explored. The spatial characteristics are, the relationship beyond the visual connection through seamless connection; the multiple access paths and discard of transition space thereby diminishing boundaries; the environmentalization of architecture by spatializing circulation and promoting in-hierarchy. The significance of undulated planes are, the synthesis form of architectural typology; the cultivation of public sense; the closest spatial type to the space of appearance referred to by Hannah Arendt.

• 한국환경보건학회지
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• 제36권4호
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• pp.313-322
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• 2010

The aim of this research was to apply experimental design methodology to optimization of conditions of electrochemical oxidation of Rhodamine B (RhB) and N, N-Dimethyl-4-nitrosoaniline (RNO, indicative of the OH radical). The reactions of electrochemical oxidation of RhB degradation were mathematically described as a function of the parameters of current ($X_1$), NaCl dosage ($X_2$) and pH ($X_3$) and modeled by the use of the central composite design. The application of response surface methodology (RSM) yielded the following regression equation, which is an empirical relationship between the removal efficiency of RhB and RNO and test variables in a coded unit: RhB removal efficiency (%) = $94.21+7.02X_1+10.94X_2-16.06X_3+3.70X_1X_3+9.05X_2X_3-{3.46X_1}^2-{4.67X_2}^2-{7.09X_3}^2$; RNO removal efficiency (%) = $54.78+13.33X_1+14.93X_2- 16.90X_3$. The model predictions agreed well with the experimentally observed result. Graphical response surface and contour plots were used to locate the optimum point. The estimated ridge of maximum response and optimal conditions for the RhB degradation using canonical analysis was 100.0%(current, 0.80 A; NaCl dosage, 2.97% and pH 6.37).

• Earthquakes and Structures
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• 제1권1호
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• pp.69-91
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• 2010

Current seismic design codes do not contemplate explicitly some variables that are relevant for the design of structures subjected to ground motions exhibiting large energy content. Particularly, the lack of explicit consideration of the cumulative plastic demands and of the degradation of the hysteretic cycle may result in a significant underestimation of the lateral strength of reinforced concrete structures built on soft soils. This paper introduces and illustrates the use of a numerical performance-based methodology for the predesign of standard-occupation reinforced concrete ductile structures. The methodology takes into account two limit states, the performance of the non-structural system, and in the case of the life safety limit state, the effect of cumulative plastic demands and of the degradation of the hysteretic cycle on the assessment of structural performance.

• Membrane and Water Treatment
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• 제10권6호
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• pp.417-429
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• 2019

Poly Sulfone nanofibers were electrospun to fabricate membranes of different characteristics. To fabricate the fiber mats, polymer concentration, flowrate, and current density were determined as the most influencing factors affecting the overall performance of the membranes and studied through Response Surface Methodology. The Box-Behnken Design method (three factors at three levels) was used to design, analyze, and optimize the parameters to achieve the best possible performance of the electrospun membranes in forward osmosis process. Also, internal concentration polarization that characterizes the efficiency of the forward osmosis membranes was determined to better assess the overall performance of the fabricated electrospun membranes. Water flux to reverse salt flux was considered as the main response to assess the performance of the membranes. As confirmed experimentally, best membrane performance with the minimal structural parameter value could be achieved when predicted optimal values were used to fabricate the membranes through electrospinning process.

• 대한전자공학회:학술대회논문집
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• 대한전자공학회 2007년도 하계종합학술대회 논문집
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• pp.137-138
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• 2007

This paper describes a design methodology of wireless networked Public View Monitor (PVM) based on Bluetooth network. We present the S/W design methodology of wireless networked PVM and experimental analysis using the implemented system. The developed system can be applied to industrial and market area by easy maintenance and flexibility.