• 아동학회지
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• 제33권5호
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• pp.53-70
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• 2012

The purpose of this study was to investigate the effects of task conditions (physical similarity between the spatial product and the reference space, presentation place of the spatial product) on children's spatial representation. The participants consisted of 40 3-year-olds and 40 4-year-olds. The results of this study are as follows. Both 3-year-olds and 4-year-olds were capable of a greater degree of spatial representation when there was a high level of physical similarity between the spatial product and the reference space, and when the presentation place of the spatial product was in the reference space. 4-year-olds were capable of more accurate spatial representation than 3-year-olds. There was no significant difference in the children's spatial representation depending on the type of spatial product (scale model, map). The results revealed that the physical similarity between the spatial product and the reference space and the presentation place of the spatial product are essential in young children's spatial representation. Additionally, the results indicated that spatial representation of children develops gradually from when they are three to when they turn four.

• 한국조경학회지
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• 제38권2호
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• pp.37-52
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• 2010

본 연구는 근대에 조성되기 시작한 서울의 도시공원의 조성과 관련한 제 전반의 사항들이 어떤 흐름으로 변화해왔는지를 고찰하기 위함을 주요 목적에 두고 시작하였다. 이를 위해 개방 이후 조성된 서울의 대부분 공원들이 다양한 형태의 기념성, 상징성을 내포하고 있거나 혹은 장소 자체 기억을 재현할 것이라는 가설을 전제하고 연구를 착수하였다. 공원 내 상징성, 기념성, 장소기억의 물리적 혹은 비 물리적 요소들의 재현양상을 살펴보면 다음과 같다. 첫째, 공원 내 기념성 및 상징성이 물리적인 형태로 나타나는 경우 기념비, 동상 등의 형태를 띠는 경우가 많이 있으며, 이는 공원의 조성 목적이 기념공원에 부합하는 경우 좀 더 적극적인 형태로 기념비적 요소들이 많이 사용되었다. 그 이외의 경우는 공원 전체의 개념과는 관계없이 국가에서 임의로 지정한 상징성을 띠는 조각물이나 동상들이 많이 사용되었다. 장소기억의 경우, 과거에는 기념성이나 상징성 구현 방법과 같이 동상이나 일부 건조물 등으로 표현되는 경우가 많았으나, 최근에는 일정 시기 장소기억을 공원 전체에 조화시키는 양상을 띠기 시작한다. 둘째, 비 물리적 재현요소들의 경우 공원 명칭에서 기념성 및 상징성을 드러내는 경우가 많다. 최근에 들어서는 명칭에서 직접적으로 드러내는 경우는 많이 약화되었다고 볼 수 있으나. 공원의 부분 장소 명칭에서 장소기억과 관련하여 지어지는 경우가 많아졌다. 공원 내에서 벌어지는 이벤트의 경우, 탑골공원 등 개방 초기 조성된 공원들에서 일부 당시의 시대 상황을 기념하기 위해 설정된 경우 등이 있었다. 장소기억이 강조되어 최근 조성된 공원들의 경우 이와 관련하기 보다는 다양한 형태로 시민참여를 유도하는 것을 가장 큰 목적에 두고 설정되는 경우가 많다.

• 대한지리학회지
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• 제49권1호
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• pp.77-90
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• 2014

영화에 표현된 장소 재현을 살펴보고자 인천상륙작전을 소재로 한 영화 두 편을 분석하였다. 인천상륙작전은 한국전쟁 당시 인천에 주둔했던 주체가 변화하는 전환점이자, 한국사회 이데올로기의 분기점으로 정립된 큰 사건이었던 만큼 아직까지 이에 대한 해석이 분분하다. 사례로 한국 영화 '인천상륙작전'(1965)과 북한 영화 '월미도'(1982)를 선정하였다. 제작자가 다르다는 것은 제작의도의 차이를 말한다. 제작자가 선택한 재현 대상을 밝혀 영화 속 장소를 알 수 있었다. 그 결과 상륙군 관점에서는 승리를 기념하는 스펙터클을 보여주었지만, 방어군 관점에서는 전사자들을 영웅으로 기록하고 있었다. 제작자는 실제 장소를 의도에 맞게 선택하고 표현하기에 장소 내부적 특성을 파악할 수 있으며, 그로인해 영화의 배경을 알 수 있게 한다. 이와 함께 장소 외부를 표현한 영화 속 장소는 새롭게 미장센으로 공간을 연출한다. 화면에는 보이지 않지만 대사로 전달되는 언어 재현 장소는 장소에 대해 내부자와 외부자 관계를 파악하게 한다.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제11권3호
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• pp.1477-1491
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• 2017

Inspired by the multi-scale nature of hippocampal place cells, a biologically inspired model based on a multi-scale spatial representation for goal-directed navigation is proposed in order to achieve robotic spatial cognition and autonomous navigation. First, a map of the place cells is constructed in different scales, which is used for encoding the spatial environment. Then, the firing rate of the place cells in each layer is calculated by the Gaussian function as the input of the Q-learning process. The robot decides on its next direction for movement through several candidate actions according to the rules of action selection. After several training trials, the robot can accumulate experiential knowledge and thus learn an appropriate navigation policy to find its goal. The results in simulation show that, in contrast to the other two methods(G-Q, S-Q), the multi-scale model presented in this paper is not only in line with the multi-scale nature of place cells, but also has a faster learning potential to find the optimized path to the goal. Additionally, this method also has a good ability to complete the goal-directed navigation task in large space and in the environments with obstacles.

• 말소리와 음성과학
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• 제7권3호
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• pp.27-35
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• 2015

The purpose of this study is to examine the lexical representation of phonological variants derived from optional vs. obligatory phonological processes. Given that place assimilation is optionally processed, whereas nasal assimilation is obligatory in Korean, a long-term repetition priming experiment was conducted, using a shadowing task. Korean speakers shadowed words containing either assimilated or unassimilated consonants in three priming conditions and their shadow responses were evaluated. It was shown that in both place and nasal assimilations, shadowing latencies for unassimilated stimuli were longer than those for assimilated stimuli in the mismatched condition. These results suggest that even in the optional assimilation, assimilated variants were processed more easily and faster than the canonical variants. The present results argue against the frequency-based account of multiple lexical representation (Connine, 2004; Connine & Pinnow, 2006; Ranbom & Connine, 2007; $B{\ddot{u}rki$, Ernestus, & Frauenfelder, 2010; $B{\ddot{u}rki$, Alario, & Frauenfelder, 2011).

• 음성과학
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• 제9권4호
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• pp.131-142
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• 2002

Place assimilation in Korean has been argued to reflect the consonantal strength hierarchy in which velar is stronger than labial which is in turn stronger than coronal. The strength relationship has been manifested in two ways in literature. One is through phonological representation as shown in Iverson and Lee (1994). The other is through perceptual salience ranking as suggested by Jun (1995). The goal of this study is to examine the perceptual salience of placed consonants through an identification experiment. The experiment conducted in this study reveals four facts. First, place identification of a prevocalic consonant is higher than that of a postvocalic one. Second, place identification of a stop in coda is more confusable than that of a nasal counterpart in Korean contrary to other previous studies. Third, velar is most confusable in place identification in contrast to Jun (1995) and Hume et al. (1999). Finally, place perception of consonants can vary depending on adjacent vocalic context. These results suggest that perceptual salience is one of the possibly several factors affecting a phonological process.

• 미술이론과 현장
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• 제16호
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• pp.139-174
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• 2013

Pliny the Elder said that multiple cultures agree that the painting began as a shadow trace. A daughter of Butades, the potter in Corinth, traced an outline around a man's shadow, and it was the very beginning of painting. In this anecdote, the profile, i. e. the portrait substitutes body of the absent lover. It makes the absent body present and replaces his place. In this context Hans Belting put the anthropological value to this visual practice. Human being made images to cope actively with the shock of death and the disappearing of body. With the aid of the representation of the bodily presence, the image struggles to resist the death. This paper is a study on the critical meaning of representation in the context of bodily survival by image. The representation is the paradoxical trick of consciousness, an ability to see something as 'there' and 'not there' at the same time. So the connection between image and the body would be suspicious. Although this relation was tight in the ancient shadow painting and the medieval effigies, the modern visual practice forsakes this connection and exposes the trick of representation. It insists that image was not real and even expels the medieval visual practice from the boundary of fine arts. The genealogy of the portraiture is formed by two different visual practices. The belief and the disbelief in the image are observed in the process of representation and anti-representation, and this ambivalence transforms the ontological meaning of portrait in the visual representation.

• 제어로봇시스템학회논문지
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• 제14권8호
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• pp.727-732
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• 2008

In this paper, the state-space representation of generalized complimentary filter is proposed. Complementary filter has the suitable structure to merge information from sensors whose frequency regions are complementary. First, the basic concept and structure of complementary filter is introduced. And then the structure of the generalized filter and its state-space representation are proposed. The state-space representation of complementary filter is able to design the complementary filter by applying modern filtering techniques like Kalman filter and $H_{\infty}$ filter. To show the usability of the proposed state-space representation, the design of Inertial Navigation System(INS) vertical channel damping loop using Global Positioning System(GPS) is described. The proposed GPS/INS damping loop lends the structure of Baro/INS(Barometer/INS) vertical channel damping loop that is an application of complementary filter. GPS altitude error has the non-stationary statistics although GPS offers navigation information which is insensitive to time and place. Therefore, $H_{\infty}$ filtering technique is selected for adding robustness to the loop. First, the state-space representation of GPS/INS damping loop is acquired. And next the weighted $H_{\infty}$ norm proposed in order to suitably consider characteristics of sensor errors is used for getting filter gains. Simulation results show that the proposed filter provides better performance than the conventional vertical channel loop design schemes even when error statistics are unknown.

• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 1988년도 한국자동제어학술회의논문집(국내학술편); 한국전력공사연수원, 서울; 21-22 Oct. 1988
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• pp.501-506
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• 1988

This paper describes an experimental system for automatic robot programming, The SNU-ARPS (Seoul National University Automatic Robot Programming System). The SNU-ARPS generates executable robot programs for pick and place operation and some simple mechanical assembly tasks by menudriven dialog. It is intended to enable the user to concentrate on the overall operation sequence instead of the knowledge regarding the details of robot languages. To convert task specifications into manipulator motions, the SNU-ARPS uses an internal representation of the world. This representation initially consists of geometric database from CAD system and is updated at each operation step to reflect the state changes of the world.

• 한국지능시스템학회:학술대회논문집
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• 한국퍼지및지능시스템학회 1993년도 Fifth International Fuzzy Systems Association World Congress 93
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• pp.1133-1136
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• 1993

Fuzzy algorithm is essentially nondeterministic, but to guarantee the stable control the fuzzy control program should be deterministic in practice. Fuzzy controllers with matrix representation is very simple in construction and very fast in computation. The value of the matrix is not adequate at the first place, but can be modified by using the neural networks. We apply the simple heuristic techniques to modify the matrix successfully.