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Magnus B. Kjelland,Michael R. Hansen,Ilya Tyapin,Geir Hovland 제어로봇시스템학회 2012 제어로봇시스템학회 국제학술대회 논문집 Vol.2012 No.10
The current work is on motion control of a hydraulically actuated manipulator with a view to handle offshore payload transfer between moving frames. The manipulator has redundant actuation and also, a non-actuated degree of freedom. The motion control has two targets: tool point control and compensation of the non-actuated degree of freedom. The redundancy is handled by means of pseudo-inverse kinematics while optimizing a cost function, avoiding mechanical joint limits. The compensation of the un-actuated degree of freedom employs LQR control, minimizing position and velocity error while maintaining the tracking reference for the tool-point. The proposed control scheme is implemented and experimentally validated in a practical system where the manipulator is mounted on a Stewart platform that allows for the simulation of wave induced heave motion as a disturbance.
Whither West Asia? Exploring North–South perspectives on Eurasia
Magnus Marsden1,Till Mostowlansky 한양대학교 아태지역연구센터 2019 Journal of Eurasian Studies Vol.10 No.1
The introduction to the Special Issue explores the relevance of the concept of West Asia for understanding connections between East Asia, Eurasia, and the Middle East. It seeks to go beyond the tendency in much scholarly work concerning regional connectivity in Asia to fixate on various permutations of the “Silk Road” or East–West ties more generally. We bring attention, rather, to the simultaneous significance of dense North–South connections that enable the interpenetration of varying parts of Asia and argue that West Asia is analytically helpful in bringing definition to such ties.
Families of fuzzy and crisp languages defined by identities
Magnus Steinby 원광대학교 기초자연과학연구소 2020 ANNALS OF FUZZY MATHEMATICS AND INFORMATICS Vol.19 No.3
We present a general scheme for defining families of fuzzy languages and the related families of crisp languages. In particular, all the varieties of regular fuzzy languages of T.~Petkovi\'c (2005) together with their associated $\star$-varieties of S.~Eilenberg (1976) and varieties of finite monoids are obtained this way, but also pairs of more general families of regular fuzzy and crisp languages can be defined. For the families that are not varieties, we show how to get the greatest varieties contained in them. As examples we consider the varieties of commutative fuzzy and crisp languages, the families of rotation invariant fuzzy and crisp regular languages, which are not varieties, and the varieties of aperiodic fuzzy and crisp languages, which are ultimately defined by a sequence of identities.
Magnus Marsden1,David Henig 한양대학교 아태지역연구센터 2019 Journal of Eurasian Studies Vol.10 No.1
This article explores the concept of West Asia in relationship to recent work in the global history of Islam that points toward the existence of transregional arenas of historic significance that incorporate many of Asia’s Muslim societies. Recent anthropological work has also brought attention to the dynamic nature of the relations and cultural connections between peoples living in regions that once formed part of expansive arenas of interaction yet were divided by imperial and national boundaries, as well as the ideological conflicts of the Cold War. Against this political and historical context, we deploy West Asia as a geographical scale that brings to light interconnected forms of life that have been silenced by traditional area studies scholarship. We compare our field work experiences with two different networks made-up of Muslims that span different axis of Muslim Asia. We argue that “West Asia” brings attention to influential connections, communities, and circulations that both bear the imprint of deeper pasts as well as the influence of emergent and shifting transregional dynamics in the present. Furthermore, by emphasizing connective dynamics that move beyond the rather conventional focus on east–west relationships, the category West Asia also encourages scholarship to highlight multiple yet hitherto little explored inter-Asian north–south connections.
BCH Coding for Data Hiding with t = 4
Magnus Botnan,Vasiliy Sachnev,Hyoung Joong Kim,Jong-cheol Moon 한국멀티미디어학회 2009 한국멀티미디어학회 국제학술대회 Vol.2009 No.-
This paper presents an improved data hiding technique based on BCH (n,k,t) syndrome coding. The proposed data hiding method embeds data to a block of input data (for example, image pixels, wavelet or DCT coefficients, etc.) by modifying some coefficients in a block in order to null the syndrome of the BCH coding. The proposed data hiding method can hide the same amount of data with less computational time compared to the existed methods. Contribution of this paper includes the increasing capacity of the data embedding based on BCH. The proposed scheme shows that BCH syndrome coding for data hiding when t = 4 is now possible ascribed to the reduced complexity.
Magnus Marsden 한양대학교 아태지역연구센터 2017 Journal of Eurasian Studies Vol.8 No.1
This article explores the relevance of the concept of Silk Road for understanding the patterns of trade and exchange between China, Eurasia and the Middle East. It is based on ethnographic fieldwork in the city of Yiwu, in China's Zhejiang Province. Yiwu is a node in the global distribution of Chinese ‘small commodities’ and home to merchants and traders from across Asia and beyond. The article explores the role played by traders from Afghanistan in connecting the city of Yiwu to markets and trading posts in the world beyond. It seeks to bring attention to the diverse types of networks involved in such forms of trade, as well as their emergence and development over the past thirty years.