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안상철,이정우,김형곤 대한전자공학회 2006 電子工學會論文誌-SC (System and control) Vol.43 No.2
This paper proposes to use the UPnP as a middleware for robots. It describes the advantages of the UPnP by comparing it with the TAO CORBA that was used in a few robot development projects. We select a sample robot architecture, and examine the possible use of the UPnP as a robot middleware. This paper shows how the UPnP architecture can be applied to building a robot in the view of software architecture, message mapping, realtime, priority, network selection, performance, memory footprint, and deployment issues. 본 논문은 최근 Device용 미들웨어로 부각되고 있는 UPnP를 로봇 미들웨어로 사용하는 것을 제안한다. 본 논문에서는 UPnP의 장점을 보이기 위해서 현재 몇몇 로봇개발에 사용된 TAO CORBA와 비교분석을 하였다. 또한, 하나의 sample 로봇 아키텍처를 잡고, 여기에 UPnP를 로봇 미들웨어로 사용하는 것을 실험하여, 소프트웨어 아키텍처, message mapping, realtime 이슈, 우선순위, 네트웍, 성능, 메모리 용량, 그리고 소프트웨어 배치(deployment) 등의 관점에서 UPnP가 로봇 미들웨어로 사용될 수 있음을 보였다.
안상철 경희대학교 언어정보연구소 2007 언어연구 Vol.24 No.2
The purpose of this paper is to show how various types of phonological variations can be accounted for within the framework of Optimality Theory. Here I will specifically show how relevant constraint ranking relationship can be adjusted to account for the optionality of certain constraints or subsequent variations. To this end, I will first introduce the recent approaches to the phonological variations (Hammond 1994, Nagy & Reynold 1997, Anttila & Cho 1998, Anttila 1997, 2002, Hong 2006, etc.). I will then compare these accounts with the so-called Stochastic Optimality Theory (Boersma 1997, Hayes et al. 2003, Hayes & Londe 2006, etc). Based on this introduction, the main part of this paper will be spared to the stochastic account by Hayes & Londe (2006) demonstrating how the variational behavior of Hungarian vowel harmony can be dealt with within this stochastic framework. Finally, it will be suggested how Stochastic Optimality Theory can be extended to the description of various phonological variations occurring in Korean phonology.
On the evolution of the laryngeal contrasts in Korean
안상철 한국음운론학회 2009 음성·음운·형태론 연구 Vol.8 No.1
This paper discusses how the laryngeal contrasts have evolved in the history of the Korean language, with respect to the motivations and the constraint interactions. I first treat the emergence of tense consonants as lengthening of duration as well as segmental loss. For this, I argue that the overall emergence has evolved from an alignment constraint to the effect that a fortified edge be aligned with a certain edge, signaling a loss of an extra consonant. Here I employ the “geminate hypothesis” (Ahn & Iverson 2004) in providing various pieces of evidence to support this claim, such as tonal characteristics, ideolectal/dialectal variations, and loanword adaptation, etc. As for the emergence of the aspirated series, I examine if there are certain phonetic or phonological constraints, suppressing velar aspiration, while favoring coronal aspiration, which seems to show the markedness hierarchy. I, however, demonstrate that the markedness hierarchy does not play any role in the restricted distribution of the velar aspirates as the emergence pattern can be better explained in terms of the functional overlap between the existing /h/ and a possible velar aspirate. I thus claim that the overall process of the emergence of aspiration can be effectively described within the framework of Dispersion Theory as the overall consequence is obtained by the pattern evaluation of the adjacent segments. Finally, I show that the overall change should be described by dividing it into (at least) three historical stages in which each stage requires a different constraint ranking accounting for its change more properly.
안상철 경희대학교 언어연구소 1995 언어연구 Vol.13 No.-
이 글의 주된 음절과 관련된 음운이론의 발전과정을 소개하고 그 결과를 조명하는 데 있다. 이 목적을 위하여 음절의 개념이 중요한 변수로 등장한 1970년대 이후의 음절에 대한 주요 이론에 대한 제안을 중심으로 그 배경과 이론적 근거를 논의를 전개하고 그 결과로 나타난 최근의 여러 제안을 검토한다. 또한 이러한 논의를 바탕으로 형태이론과의 연관성을 갖는 운율이론 등도 함께 분석하기로 한다.