• Journal of the Korean Institute of Intelligent Systems
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• v.19 no.5
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• pp.622-628
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• 2009

A proper walking pattern is to be assigned for a walk of multi-legged robots. For the purpose of identifying a good walking pattern for multi-legged robots, this paper consider a simple model of quadruped robotic walking and analyze its walking balance based on the centroid of foot polygons formed in every step. A performance index to estimate the walking balance is also proposed. Simulation studies show that the centroid trajectory of foot polygons and the walking balance in a common quadruped walking are different according to the walking pattern employed. Based on the walking balance index and a bio-mimetic aspect, a useful walking pattern for quadruped robots is finally addressed.

• The Optical Journal
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• s.104
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• pp.75-78
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• 2006

사용의 편리성, 신속성, 간편성 등 다양한 장점을 가진 디지털카메라가 필름카메라를 제치고 전세계적으로 급속하게 확산되고 있다. 디지털카메라는 편리하고 신속하게 이미지를 얻을 수 있다는 큰 장점이 있지만 ‘왜곡된 색상’으로 인하여 필름카메라보다 못하다는 평가를 받기도 한다. 이처럼 세계적으로 디지털 카메라, 캠코더 사용자 모두가 겪는 애로점이 바로‘컬러 밸런스(화이트밸런스)’이다. 본 고에서는‘컬러 & 화이트밸런스’를 요약하여‘밸런스로’표현하고자 한다. 문제는 사용자들이 디지털카메라 사용방법에 대하여 대다수가 잘 모르고 있다는 것이다. 많은 프로들과 유저들이 디지털 카메라로 촬영한 사진은 당연히‘후 보정’을 하는 것이 정상인 것처럼 알고 있으며, 심지어 디지털 카메라는‘후 보정’을 위한 카메라인 것으로 잘못 알고 있는 경우가 그것이다. 그러나 좋은 사진은‘후 보정’을 하지 않고서‘원색’을 그대로 표현 할 수 있는 것이‘작품’으로서의 진정한 가치가 있고, 사진의‘예술’인 것이다.고급기종의 디지털 카메라를 보유한 대부분의 사용자들은 카메라의 복잡한 기능 메뉴에 번거로움을 겪고 있다. 보편적으로 오토, 태양, 구름, 노을, 형광등1.2, 백열등, K, 켈빈도, 프리셋 등의 기능이 있으나 대부분 커스텀에서 기본 세트메뉴인‘오토’등의 모드를 선택하여 촬영을 하고 있고, 핵심 기능인‘프리셋’은 사용방법조차 모르고 있는 유저들이 많다. 또한 커스텀 모드의 기본메뉴를 선택하여 촬영을 했을 때 색상이 왜곡되는 것을 디지털 카메라는 당연히 그런 것으로 알고 있으며, 따라서 후보정은 당연한 것으로 대부분이 인식하고 있다. 그중에서 원색의 중요성을 인식하는 일부 사용자들만‘프리셋’기능에서 그레이 카드 등으로 밸런스를 세팅하여 촬영을 하고 있다.그러나 가장 정확한 것으로 알고 수 십 년간 사용해오던 그레이 카드 등을 이용하여 프리셋 모드에서 밸런스를 세팅하여 촬영을 할 경우에도, 카메라에 기본적으로 내장된‘커스텀 모드’보다는 색상이 다소 좋은 것을 알 수 있으나, 정확한 원색의 이미지를 얻기는 매우 어려워, 디지털 카메라의 한계라고까지 표현을 하고 있다.

• Journal of Korea Game Society
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• v.15 no.4
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• pp.49-58
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• 2015

Due to the improving mobile environments, we can play RPG in not only computer online field but also mobile field. It is difference from hardware environment between them so that mobile RPG has been changed and modified to play in mobile environment except RPG's frame and basic element. This Study has investigated the model to evaluate the balance of battle that is based on the RPG. Although there is an assessment model studied with a focus on the MMORPG, It is difficult to apply to the entire balance in RPG especially mobile RPG. Former model has used only basic element because there were so many kinds of variables such as user's controls, other players and objects in game. The reason why that model just gave a guide line about battle balance. In this paper, the new assessment model to include the balance factors such as BUFF, NURF and PASSIVE could be possible for applying the balance of mobile RPG on recent trends. As a result, the new model can measure numerical calculations compared to the previous model.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.17 no.11
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• pp.691-700
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• 2016

This study was performed to provide data for developing a more effective and practical pilates exercise program for young women. To meet this purpose, 20 young women were assigned to both groups. The experiment was conducted according to the experimental procedure. Ten subjects in the pilates exercise group performed exercise for 60 minutes everyday at a frequency of 3 days per week for 8 weeks. The subjects in both groups were measured for their physical composition, isokinetic muscular strength in legs, and body balance before and after the experiment. After 8 weeks, the pilates exercise group's body composition showed significantly increased muscular amount (p <.01). There was a statistical increase in knee joint muscle function. For the right knee joint and left knee joint, right knee joint extensor muscle's maximum muscular strength and total work significantly increased under conditions of $60^{\circ}/sec$ (p<.05). Under conditions of $180^{\circ}/sec$, there were statistically significant increases in left knee joint flexor muscle's maximum muscular strength (p<.05). For balance, balance of both legs and right leg showed statistically increases (p<.05).

• Journal of the Korean Society for Aeronautical & Space Sciences
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• v.31 no.9
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• pp.9-17
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• 2003

In this paper, the weight tare calculation method including translation of initial loads is proposed to remove the internal balance component readings due to model weight. If the balance calibration equations are applied directly to the wind-on data without taking account these initial loads, then incorrect data will be obtained for all wind-on data calculations. The calculated model weights were compared with the actual model weights to verify the reliability of the proposed calculation technique. Also, discussions of the effects of the initial loads are given.

• Proceedings of the Korean Society of Propulsion Engineers Conference
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• 2017.05a
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• pp.310-319
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• 2017

This paper introduces the method how to measure the thrust in impulse facility. In a Facility having such a short duration time of steady flow, there's no time to reach a steady state of the forces acting on model so that the test model vibrates until the end of the flow. The forces exerted on an engine exist with vibration so that the usual force balance can not be used. SWFB(Stress Wave Force Balance) technique is utilized in a shock tunnel to get the thrust. As an example, a model force balance has been calculated its strain against impulse force by using FEM(Finite Element Method). A transfer function between the impulse force and strain has been obtained by the way of de-convolution.

• Childhood Kidney Diseases
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• v.14 no.2
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• pp.111-119
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• 2010

The maintenance of the osmolality of body fluids within a very narrow physiologic range is possible by water balance mechanisms that control the intake and excretion of water. Main factors of this process are the thirst and antidiuretic hormon arginine vasopressin (AVP), secretion regulated by osmoreceptors in the hypothalamus. Body water is the primary determinant of the osmolality of the extracellular fluid (ECF), disorders of body water homeostasis can be divided into hypo-osmolar disorders, in which there is an excess of body water relative to body solute, and hyperosmolar disorders, in which there is a deficiency of body water relative to body solute. The sodium is the predominant cation in ECF and the volume of ECF is directly proportional to the content of sodium in the body. Disorders of sodium balance, therefore, may be viewed as disorders of ECF volume. This reviews addresses the regulatory mechanisms underlying water and sodium metabolism, the two major determinants of body fluid homeostasis for a good understanding of the pathophysiology and proper management of disorders with disruption of water and sodium balance.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.12 no.8
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• pp.1356-1362
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• 2008

In this paper. we propose a novel auto white balance algorithm which is one of the representative functions on cameras. White balance is the process of removing unrealistic color casts, which will make the captured white objects appear white. For white balance, we employ $CIEL^*a^*b^*$ color space which is the most complete color model available and is conventionally used to describe all the colors visible to the human eye and estimate the color difference on white objects with distribution of the image which is called the reference white estimation. For accuracy, we form groups or sets of pixels that are altered by the light sources and other elements. Moreover, Standard group is decided by judgment of specific-case images with the information of groups. Then, the reference white estimation is performed by the color sampling which is to choose all the accumulated pixels contained within the standard group. The color gain for image compensation by considering the color saturation is also computed. the proposed algorithm provides a significant performance.

• Proceedings of the KIPE Conference
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• 2010.07a
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• pp.261-262
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• 2010

본 논문에서는 새로운 구조의 전류평형 트랜스포머를 제안한다. 기존 방식은 하나의 CCFL(Cold Cathode Fluorescent Lamp)당 하나의 밸런스 코일이 필요한데 반해, 제안된 방식은 4 개의 CCFL당 하나의 밸런스 코일로 구동하는 방식이다. 따라서 소자수가 감소하고 전원 구동부의 부피가 저감되는 효과가 있다. 본 논문에서 제안된 밸런스 코일을 Gyrator 모델링을 통해 이론적으로 분석하였으며, 모의실험을 통해 46인치 LCD TV용 인버터에 적용하여 동작의 타당성을 검증하였다.

• Proceedings of the KIPE Conference
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• 2019.07a
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• pp.457-458
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• 2019

최근 산업의 발전과 함께 고용량의 높은 에너지 밀도의 배터리에 대한 요구가 증가함에 따라 배터리의 빠르고 안정적인 충전에 관한 다양한 요구들이 발생하고 있다. 배터리는 하나의 셀이 아닌 다중 셀의 집합체로써 안정적인 충전을 위해서는 주별 셀 간의 밸런스 유지가 중요 요소이다. 이를 위하여 배터리 관리 시스템인 BMS(Battery Management System)는 배터리 셀의 밸런스 유지를 위한 다양한 방법들을 적용하여 왔다. 그 대표적인 방법으로 저항을 통해 밸런스를 조절하는 Active 방식과 셀간 에너지 교환을 실시하는 Passive 방식이 있다. 그러나 이러한 방법들은 효율 및 수명, 시간 등의 문제가 제기되었다. 이에 따라 본 논문에서는 배터리 셀 Level에서의 새로운 충전 방안을 제시하였으며, 이를 실제적인 시험 시스템을 통하여 그 성능을 입증하였다.