• 전기학회논문지
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• 제57권4호
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• pp.686-691
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• 2008

This paper proposes the concept of "virtual sensor data" and its application for real time obstacle avoidance. The virtual sensor data is virtual distance which takes care of the movement of the obstacle as well as that of the robot. In practical application, the virtual sensor data is calculated from the odometry data and the range sensor data. The virtual sensor data can be used in all the methods which use distance data for collision avoidance. Since the virtual sensor data considers the movement of the robot and the obstacle, the methods utilizing the virtual sensor data results in more smooth and safer collision-free motion.

• Nonlinear Functional Analysis and Applications
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• 제28권2호
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• pp.395-405
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• 2023

In this manuscript, we establish the concept of 𝓗(ω, θ)-contraction which based on modified ω distance mappings which introduced by Alegre and Marin [4] in 2016 and 𝓗 simulation functions which introduced by Bataihah et.al. [14] in 2020 and we employ our contraction to prove the existence and uniqueness some new fixed point results. On the other hand, we create some examples and an application to show the importance of our results.

• Communications for Statistical Applications and Methods
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• 제30권4호
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• pp.411-421
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• 2023

This paper provides a new estimation equation based on the concept of a minimum distance between the empirical and theoretical distribution functions under the most widely used progressive Type-II censoring scheme. For illustrative purposes, simulated and real datasets from a three-parameter Weibull distribution are analyzed. For comparison, the most popular estimation methods, the maximum likelihood and maximum product of spacings estimation methods, are developed together. In the analysis of simulated datasets, the excellence of the provided estimation method is demonstrated through the degree of the estimation failure of the likelihood-based method, and its validity is demonstrated through the mean squared errors and biases of the estimators obtained from the provided estimation equation. In the analysis of the real dataset, two types of goodness-of-fit tests are performed on whether the observed dataset has the three-parameter Weibull distribution under the progressive Type-II censoring scheme, through which the performance of the new estimation equation provided is examined.

• The Journal of the Acoustical Society of Korea
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• 제16권2E호
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• pp.55-61
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• 1997

This paper proposes a MSHMM(Multi-Section Hidden Markov Model) recognition method based on Fuzzy Concept, as a method on the speech recognition of speaker-independent. In this recognition method, training data are divided into several section and multi-observation sequences given proper probabilities by fuzzy rule according to order of short distance from MSVQ codebook per each section are obtained. Thereafter, the HMM per each section using this multi-observation sequences is generated, and in case of recognition, a word that has the most highest probability is selected as a recognized word. In this paper, other experiments to compare with the results of these experiments are implemented by the various conventional recognition methods(DP, MSVQ, DMS, general HMM) under the same data. Through results of all-round experiment, it is proved that the proposed MSHMM based on fuzzy concept is superior to DP method, MSVQ method, DMS model and general HMM model in recognition rate and computational time, and does not decreases recognition rate as 92.91% in spite of increment of speaker number.

• The International Journal of Costume Culture
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• 제3권1호
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• pp.21-29
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• 2000

The purpose of this study was to analyze the 21C Fashion's expression related to 'Verfremdung' theory, in aesthetic theories established after modern times, and then to examine a new meaning and value. The expressions of 'Verfremdung(estrangement)' in modern fashion, appear the followings: 1) placing distance with traditional sex and rational beauty of body. 2) paradox of inversion, 3) illogical juxtapositions by encounter. 4) dismantlement of material concept etc. After showing practically production technique that breaks traditional exception, that is, a new design method of open concept which drives positive idea about discrepancy of realities. This trial has warning abut art's self-control occurring at the time when aesthetic disinterestedness theory is expanded, and is considered indictment about a inhuman property of modern civilization and culture, and is considered expression of will to show alienation by it.

• 아동학회지
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• 제12권2호
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• pp.37-50
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• 1991

The purpose of this study was to assess preschool children's understanding of contagion and their use of immanent justice explanation for illness and accidents, 124 children (66 four-year-olds and 58 five-year-olds) were interviewed individually by two female interviewers. The data were analyzed by ${\chi}^2$ and correlation. Preliminary analyses revealed no significant sex and age differences: Therefore, the data were collapsed across sex and age for all further analyses. The results showed that preschool children have a concept of contagion as a cause of illness, and they understand the effect of distance between people on the likelihood of transmitting contagious ailments. They overextend the concept of contagion to inappropriate ailments: that is, to noncontagious illnesses and to accidents. They employed immanent justice explanations for all illnesses (contagious and noncontagious) and accidents.The use of immanent justice was inversely related to application of the concept of contagion.

• 대한기계학회논문집A
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• 제25권9호
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• pp.1334-1340
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• 2001

In this paper, the experimental modeling of the force between permanent magnet and iron-core solenoid is suggested for more accurate control of 3 D.O.F. motor using the electromagnetic force. In the case of iron-core solenoid, the general equation of solenoid cant be used simply because of its nonlinearity. Therefore, the magnetic flux density is estimated through the concept of equivalent permanent magnet. The force distribution between permanent magnet and iron-core solenoid is more dependent on the magnetization of iron core caused by the permanent magnet than any other parameters. Therefore, the equation of the force estimation between these magnetic systems can be modeled by the experimental function of the magnetization of iron core. Especially, if the distance between iron-core solenoid and permanent magnet is far enough, the force equation through experiment can be expressed from only the current of coil and the distance between iron-core solenoid and permanent magnet. It means that Coulombs law can be used for magnetic systems and it is validated through the experiment. Therefore, force calibration is performed by the concept of Coulombs law.

• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 1998년도 제13차 학술회의논문집
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• pp.496-500
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• 1998

Not merely running at the designated constant speed as the classical cruise control, the adaptive cruise control (ACC) maintains safe headway distance when the front is blocked by other vehicles. One of the most essential part of ACC System is the range sensor which can measure the position and speed of all objects in front continuously, ignore all irrelevant objects, distinguish vehicles in different lanes and lock on to the closest vehicle in the same lane. In this paper, the hierarchical object recognition algorithm (HORA) is proposed to process raw scanning laser data and acquire valid distance to target vehicle. HORA contains two principal concepts. First, the concept of life quantifies the reliability of range data to filter off the spurious detection and preserve the missing target position. Second, the concept of conformation checks the mobility of each obstacle and tracks the position shift. To estimate and predict the vehicle position Kalman filter is used. Repeatedly updated covariance matrix determines the bound of valid data. The algorithm is emulated on computer and tested on-line with our ACC vehicle.

• Journal of applied mathematics & informatics
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• 제41권3호
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• pp.511-524
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• 2023

An L(p₁, p₂, p₃, . . . , p_m)-labeling of a graph G is an assignment of non-negative integers, called as labels, to the vertices such that the vertices at distance i should have at least pi as their label difference. If p₁ = 4, p₂ = 3, p₃ = 2, p₄ = 1, then it is called a L(4, 3, 2, 1)-labeling which is widely studied in the literature. A L(4, 3, 2, 1)-path coloring of graphs, is a labeling g : V (G) → Z⁺ such that there exists at least one path P between every pair of vertices in which the labeling restricted to this path is a L(4, 3, 2, 1)-labeling. This concept was defined and results for some simple graphs were obtained by the same authors in an earlier article. In this article, we study the concept of L(4, 3, 2, 1)-path coloring for complete bipartite graphs, 2-edge connected split graph, Cartesian product and join of two graphs and prove an existence theorem for the same.

• 한국방사선학회논문지
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• 제6권5호
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• pp.427-433
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• 2012

본 연구는 오른쪽 어깨관절에 칼텐본-에비엔즈컨셉 미끄러뜨림 등급II와 III으로 아래쪽미끄러뜨림 적용시 위팔뼈머리의 이동거리 및 벌림각도(abduction angle)의 변화를 알아보고자 하였다. 미끄러뜨림 등급II(Grade II) 적용시 위팔뼈머리는 초기보다 아래쪽으로 5mm 가량 이동하였고 등급III 적용시 8mm 가량 이동하였다. 이동거리에 대한 성별 비교에서는 남자가 여자에 비해 등급별로 이동거리가 높게 나타났으나 통계적으로 유의한 차이는 나타나지 않았다. 등급 II(Grade II) 적용시 벌림각도는 초기보다 $10^{\circ}$ 가량, 등급III(Grade III) 적용시 $12^{\circ}$ 가량 증가하였다. 벌림각도에 대한 성별 비교에서는 모든 등급별로 여자가 남자보다 벌림각도가 크게 나타났으나 통계적으로 유의한 차이는 나타나지 않았다. 본 연구를 통해 미끄러뜨림 등급 적용시 위팔뼈머리의 운동형상학적 변화를 알아보았으며 향후 추가 연구를 통해 이들 변화가 주변 구조물에 미치는 영향에 대해 알아본다면 보다 과학적인 근거중심의 치료를 기대할 수 있을 것으로 사료된다.