• 한국정밀공학회지
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• 제26권5호
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• pp.120-127
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• 2009

An electric furnace, inside which desired temperatures are kept constant by generating heat, is known to be a difficult system to control and model exactly because system parameters and response delay time vary as the temperature and position are changed. In this study the heating system of ceramic drying furnaces with time-varying parameters is mathematically modeled as a second order system and control parameters are estimated by using a RIV (Recursive Instrumental-Variable) method. A modified bang-bang control with magnitude tuning is proposed in the time optimal temperature control of ceramic drying electric furnaces and its performance is experimentally verified. It is proven that temperature tracking of adaptive time optimal control using a second order model is more stable than the GPCEW (Generalized Predictive Control with Exponential Weight) and rapidly settles down by pre-estimation of the system parameters.

• 대한한방내과학회지
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• 제31권4호
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• pp.914-922
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• 2010

Objective : The purpose of this study is to report the clinical effect of herb medicine (Indongsoyeom-bang) and acupuncture therapy on Chronic Prostatitis/Chronic Pelvic Pain Syndrome. Methods : 15 patients diagnosed with Chronic Prostatitis/Chronic Pelvic Pain Syndrome were enrolled in this study. They were treated with herb medicine (Indongsoyeom-bang) and acupuncture therapy. To evaluate the therapeutic effect, before and after we measured Extract Prostatic Secretion (EPS), National Institutes of Health Chronic Prostatitis Symptom Index (NIHCPSI) and International Prostatitis Symptom Score (IPSS). Result : After treatment WBC numeral index by EPS test and NIH-CPSI and IPSS decreased. Conclusion : Herb medicine (Indongsoyeom-bang) and acupuncture therapy are effective in treating Chronic Pelvic Pain Syndrome. Further study of mechanism and efficacy is needed.

• 전기전자학회논문지
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• 제17권4호
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• pp.544-549
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• 2013

본 논문은 CDR회로의 지터 감소를 위해 변형된 이진 위상검출기(뱅뱅위상 검출기- BBPD) 회로를 제안하였다. 제안된 PD는 하나의 에지를 사용함으로써 전압리플을 줄여, 제안한 PD를 적용하여 설계한 CDR회로는 감소된 지터 특성을 보였다. CMOS 0.13um 공정을 사용하여 설계하였고 제안한 위상검출기를 포함하는 클럭데이터 복원회로는 모의실험결과 16.9mW 전력소비에 peak-peak 지터는 10.96ps, rms 지터는 0.89ps을 보였다.

• 한국전산구조공학회:학술대회논문집
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• 한국전산구조공학회 2002년도 가을 학술발표회 논문집
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• pp.313-320
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• 2002

A new semi-active control strategy for seismic response reduction using a neuro-controller and a magnetorheological (MR) fluid damper is proposed. The proposed control system consists of the improved neuro-controller and the bang-bang-type controller. The improved neuro-controller, which was developed by employing the training algorithm based on a cost function and the sensitivity evaluation algorithm replacing an emulator neural network, produces the desired active control force, and then the bang-bang-type controller causes the MR fluid damper to generate the desired control force, so long as this force is dissipative. In numerical simulation, a three-story building structure is semi-actively controlled by the trained neural network under the historical earthquake records. The simulation results show that the proposed semi-active neuro-control algorithm is quite effective to reduce seismic responses. In addition, the semi-active control system using MR fluid dampers has many attractive features, such as the bounded-input, bounded-output stability and small energy requirements. The results of this investigation, therefore, indicate that the proposed semi-active neuro-control strategy using MR fluid dampers could be effectively used for control of seismically excited structures.

• 한국정보시스템학회지:정보시스템연구
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• 제33권2호
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• pp.169-189
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• 2024

Purpose The purpose of this study is to identify the influence relationship between BJ interactivity, explicitness of paid advertisements, flow, and product attitude in YouTube muk-bang, and to determine whether there are gender differences in the relationship between them. Design/methodology/approach In this study, an online survey was conducted targeting college students who watch YouTube muk-bang content using a questionnaire form provided by Google. 115 questionnaires were collected from April 1 to 15, 2024, and after excluding 15 insincere responses, a total of 100 questionnaires were used in the final analysis. Findings The results of the empirical analysis are as follows. First, the explicitness of including paid advertising was confirmed to have a significant impact on both flow and product attitude. Second, while BJ interactivity had a significant effect on flow, it was confirmed that it had no significant effect on product attitude. Third, flow was confirmed to have a significant impact on product attitude, and as a result of confirming the moderating effect due to differences between genders in the relationship between the variables set in this study, it was confirmed that there was no moderating effect.

• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 1989년도 한국자동제어학술회의논문집; Seoul, Korea; 27-28 Oct. 1989
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• pp.118-123
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• 1989

This work deals with fast-to-compute global control laws for time-optimal motion of strongly nonlinear dynamic systems like resolute robots. the theory of cell-to-cell mappings for dynamical systems offer the possibility of doing the vast majority of the control law computation offline in case of time optimization with constrained inputs. These cells result from a coarse discretization of likely swaths of state space into a set of nonuniform, contiguous volumes of relatively simple shapes. Once the cells have been designed, the bang-bang schedules for the inputs are determined for all likely starting cells and terminating cells. the resulting control law is an open-loop optimal control law with feedback monitoring and correction.

• 한국정보디스플레이학회:학술대회논문집
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• 한국정보디스플레이학회 2005년도 International Meeting on Information Displayvol.II
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• pp.1603-1606
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• 2005

Eye Glass Display (EGD) with microdisplay to realize the virtual display can make the large screen, so virtual image has been developed by using microdisplay panel. This paper shows study of low cost lens design and simulation for microdisplay system with 0.6" Liquid Crystal on Silicon (LCoS) panel. Lens design optimized consider to spherical aberration, astigmatism, distortion, and chromatic aberration. Code V is used and it designed an aspheric lens about exit pupil 6mm, eye relief 20mm and 35 degree of field of view (FOV). With the application this aspheric lens to LCOS type's microdisplay, virtual image showed 50 inch at 2m. One side of the aspheric lens was constituted from diffractive optical element (DOE) for the improvement in a performance. It had less than ${\pm}2%$ of distortion value and modulation transfer function in axial had 20% of resolution with 30 lp/mm spatial frequency. The optical system is suitable for display of 0.6"-diagonal with SVGA.

• 한국수학사학회지
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• 제21권4호
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• pp.11-18
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• 2008

이 논문은 이상혁(李尙爀)$(1810{\sim}?)$의 차근방몽구(借根方蒙求)와 수리정온(數理精蘊), 매구성(梅구成) 적수유진(赤水遺珍)과의 관계를 조사하여 이상혁(李尙爀) 서양 수학을 받아들이는 과정과 이를 확장하여 그의 대수학의 기초를 이루는 과정을 연구한다.

• KIEAE Journal
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• 제2권1호
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• pp.33-40
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• 2002

The objective of this study is to interpret a typical Korean traditional settlement for searching for planning criteria of ecological friendly housing estates. The interpreting framework is five environmental ecological ideas as the adaptation to the exterior of village, the eco-space in village, the interior of house, the cycling of material and the reasonable energy system, prevention of environment pollution and reduction of wastes. Through the interpretation, it has been found out that Bang chon village has been developed to an environmental ecological rational setting and has the meaningful elements for environmental friendly housing estates. Particularly, the spatial components of Bang-chon are characterized by the concept of multi-function, and diversity, which are worth of being considered as important planning of ecological friendly housing estates.

• 대한한의학방제학회지
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• 제14권1호
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• pp.1-10
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• 2006

3 Slices of Zingiber officinale and 2 pieces of Zizyphus jujuba in BangYakHapPyun play a proper role in herbal prescription. Zingiber officinal is roled in protection force(衛) and Zizyphus jujuba is roled in management force(營). 3 Slices of Zingiber officinal and 2 pieces of Zizyphus jujuba in upper location of BangYakHapPyun harmonize management and protection forces(營衛氣). 3 Slices of Zingiber officinale and 2 pieces of Zizyphus jujuba in middle and lower location of BangYakHapPyun compromise and treat inner and outer body condition. 5 or 7 Slices of Zingiber officinale purge noxious vapor and alleviate Pinellia ternata(半夏). Arisaema amurense (南星) poison. Todays, 3-Yangs and 2- Yins an apriority world(先天). use 3 Slices of Zingiber officinale and 2 pieces of Zizyphus jujuba. In the future. 2-Yangs and 3-Yins in a posterior world(後天) may use 2 Slices of Zingiber officinale and 3 pieces of Zizyphus jujuba.