• Title/Summary/Keyword: Evolutionary change

Search Result 118, Processing Time 0.033 seconds

A Study on the EHW Chip Architecture (EHW 칩 아키텍쳐에 관한 연구)

  • Kim, Jong-O;Kim, Duck-Soo;Lee, Won-Seok
    • Proceedings of the IEEK Conference
    • /
    • 2008.06a
    • /
    • pp.1187-1188
    • /
    • 2008
  • An area of research called evolvable hardware has recently emerged which combines aspects of evolutionary computation with hardware design and synthesis. Evolvable hardware (EHW) is hardware that can change its own circuit structure by genetic learning to achieve maximum adaptation to the environment. In conventional EHW, the learning is executed by software on a computer. In this paper, we have studied and surveyed a gate-level evolvable hardware chip, by integrating both GA hardware and reconfigurable hardware within a single LSI chip. The chip consists of genetic algorithm(GA) hardware, reconfigurable hardware logic, and the control logic. In this paper, we describe the architecture, functions of the chip.

  • PDF

Process Innovation and Selection of Organizational Structure : Modeling and Simulation of Innovation Competition Process (공정혁신과 조직선별: 혁신경쟁의 모헝화와 시뮬레이션 분석)

  • Kim, Chang-Uk
    • Korean System Dynamics Review
    • /
    • v.5 no.1
    • /
    • pp.73-97
    • /
    • 2004
  • This paper explores the relationship between technological characteristics within process innovation and selection of the firms of different organizational forms in the evolution of an industry. For this purpose, this paper develops a simulation model for industrial change that replicates dynamic competition for process innovation. The simulation analysis found the following causal relationship. First, the stronger innovation impact in terms of productivity jump tends to enlarge the productivity difference among the incumbent firms and increase the speed of productivity catch-up by the large diversified firms, Second, the possibility of entry, and eventual dominance by the large diversified firms increase when the innovation-productivity linkage is stronger and there is less cumulativeness in productivity determination. These results imply that technological characteristics are important factors that have influence on whether or not the large diversified firms can enter and succeed in an industry.

  • PDF

Formation of short-period black hole binary systems from Population III stars as grativational wave radiation sources

  • Lee, Hunchul;Yoon, Sung-Chul
    • The Bulletin of The Korean Astronomical Society
    • /
    • v.42 no.1
    • /
    • pp.59.1-59.1
    • /
    • 2017
  • Massive Population III black hole binary systems are one of the suggested candidate sources of the recently detected gravitational wave radiation (GWR). GWR detection from a black hole binary system requires a sufficiently short orbital separation at the time of their formation, such that they would undergo coalescence within the Hubble time. This condition cannot be simply fulfilled by a short initial period, because binary interactions such as mass transfer and common envelope evolution can largely change the orbital parameters and the masses of stellar components. Here, we discuss the possibility of black hole binary mergers from massive Pop III binary systems, using a new grid of Pop III binary evolutionary models with various initial primary masses ($20M_{\odot}{\leq}M{\leq}100M_{\odot}$) and initial separations, for different initial mass ratios (q = 0.5 - 0.9).

  • PDF

Okakura Kakuzō's Art History: Cross-Cultural Encounters, Hegelian Dialectics and Darwinian Evolution

  • Racel, Masako N.
    • Asian review of World Histories
    • /
    • v.2 no.1
    • /
    • pp.17-45
    • /
    • 2014
  • Okakura Kakuz$\bar{o}$ (1863-1913), the founder of the Japan Art Institute, is best known for his proclamation, "Asia is One." This phrase in his book, The Ideals of the East, and his connections to Bengali revolutionaries resulted in Okakura being remembered as one of Japan's foremost Pan-Asianists. He did not, however, write The Ideals of the East as political propaganda to justify Japanese aggression; he wrote it for Westerners as an exposition of Japan's aesthetic heritage. In fact, he devoted much of his life to the preservation and promotion of Japan's artistic heritage, giving lectures to both Japanese and Western audiences. This did not necessarily mean that he rejected Western philosophy and theories. A close examination of his views of both Eastern and Western art and history reveals that he was greatly influenced by Hegel's notion of dialectics and the evolutionary theories proposed by Darwin and Spencer. Okakura viewed cross-cultural encounters to be a catalyst for change and saw his own time as a critical point where Eastern and Western history was colliding, causing the evolution of both artistic cultures.

Video Segments Change Point Inference with Evolutionary Particle Filter (진화파티클필터를 이용한 비디오 세그먼트 전환점 추정)

  • Yu, Jun-Hui;Jang, Byeong-Tak
    • Proceedings of the Korean Information Science Society Conference
    • /
    • 2012.06b
    • /
    • pp.363-365
    • /
    • 2012
  • 데이터의 규모 및 활용도, 그리고 사용자 접근성 측면에서 실세계 데이터에서 가장 중요한 이슈가 되는 것은 비디오 데이터이다. 장르나 등장인물, 배경 등이 매우 상이한 대량의 비디오 데이터들이 등장하고 있기 때문에, 통일된 사전지식을 이용한 비디오 데이터 분석이 매우 비현실적이 되어가고 있으며 사전지식을 활용하지 않는 비디오 분석기법의 중요성이 커지고 있다. 본 논문에서는 진화 파티를 필터링과 우점 이미지를 이용하여 비디오 데이터를 분절(Segmentation)하는 기법을 소개한다. 이미지 분절화 과정에서 해결해야 할 난점은 시점 변화 및 움직임 등에 의해 발생하는 사소한 변화가 컴퓨터 관점에서는 무시하기 어려운 큰 변화로 해석될 수 있다는 점이다. 동일장면에서의 시점 변화와 같은 사소한 변화로 인하여 동일 세그먼트를 추정하지 못하는 어려움을 해결하기 위하여 우리는 이미지 일부를 표현하는 파티클의 개체군을 생성하여 협력적인 방식으로 개별 이미지 세그먼트를 표현하는 방법을 개발하였다. 또한 동일 인물의 움직임과 같은 변화에 대응할 수 있도록 진화 파티를 필터링 방법을 컬러 히스토그램 방법과 결합하여 추론 성능을 한층 개선하였다. 실제 TV 드라마에 대하여 수행된 인간 평가자의 분절 평가 결과와 비교하여 제안 방법의 성능을 확인하였다.

Genetic Linkage Plays an Important Role in Maintaining Genetic Variability under Stabilizing Selection in Changing Environment

  • Jeung, Min-Gull;Janes N. Thompson, Jr;Lee, Chung-Choo
    • Animal cells and systems
    • /
    • v.1 no.4
    • /
    • pp.619-627
    • /
    • 1997
  • Maintenance of polymorphism in a two-locus system with two alleles under stabilizing selection has been tested by Monte-Carlo simulation. The effect of each allele was additive. Only gene x environment interactions and degree of genetic linkage between loci were considered. There were no other evolutionary forces acting except stabilizing selection. Fixation rates were influenced by the extent of environmental change and the degree of genetic linkage. In most cases, stabilizing selection depleted genetic variability when two loci have a lower degree of linkage (10 cM). When two loci are closely linked (0.1 cM), however, stabilizing selection promoted balanced heterozygotes in changing environments. Thus, environment-dependent selection and recombination rate are important parameters which should be incorporated into mechanisms of maintenance of genetic variability.

  • PDF

A Study on the Evolvable Hardware Design (EHW) (진화형하드웨어 설계에 관한 연구)

  • Kim, Jong-O;Kim, Duck-Soo;Lee, Won-Seok
    • Proceedings of the IEEK Conference
    • /
    • 2007.07a
    • /
    • pp.449-450
    • /
    • 2007
  • Evolvable hardware(EHW) is a dynamic field that brings together reconfigurable hardware, artificial intelligence, fault tolerance and autonomous systems. This paper gives an introduction to the field. The features that can be used to identify and classify evolvable hardware are the evolutionary algorithm, the implementation and the genotype representation. Evolvable hardware (EHW) is hardware that can change its own circuit structure by genetic learning to achieve maximum adaptation to the environment. In conventional EHW, the learning is executed by software on a computer.

  • PDF

Adaptive Wireless Sensor Network Technology for Ubiquitous Container Logistics Development

  • Chai, Bee-Lie;Yeoh, Chee-Min;Kwon, Tae-Hong;Lee, Ki-Won;Lim, Hyotaek;Kwark, Gwang-Hoon
    • Proceedings of the Korean Institute of Information and Commucation Sciences Conference
    • /
    • 2009.05a
    • /
    • pp.317-320
    • /
    • 2009
  • At the present day, the use of containers crisscrossing seven seas and intercontinental transport has significantly increased and bringing the change on the shape of the world economy which we cannot be neglected. Additionally, with the recent technological advances in wireless sensor network (WSN) technologies, has providing an economically feasible monitoring solution to diverse application that allow us to envision the intelligent containers represent the next evolutionary development step in order to increase the efficiency, productivity, utilities, security and safe of containerized cargo shipping. This paper we present a comprehensive containerized cargo monitoring system which has adaptively embedded WSN technology into cargo logistic technology. We share the basic requirement for an autonomous logistic network that could provide optimum performance and a suite of algorithms for self-organization and bi-directional communication of a scalable large number of sensor node apply on container regardless inland and maritime transportation.

  • PDF

Smart City Policies Revisited: Considerations for a Truly Smart and Sustainable Urbanism Practice

  • Yigitcanlar, Tan
    • World Technopolis Review
    • /
    • v.7 no.2
    • /
    • pp.97-112
    • /
    • 2018
  • The notion of smart cities, presently, is a highly popular topic in urban policy circles. This concept is adopted by many cities across the world-with an aim of increasing urban smartness in various ways and areas. Productivity, innovation, liveability, wellbeing, accessibility, sustainability, governance, planning, and citizen participation are among these areas. Despite good policy intentions, smart city initiatives in practice had only limited impact in delivering the desired urban outcomes. This paper aims to investigate the smart city phenomenon and its planning practice approaches from an evolutionary perspective. The study places smart city plans and strategies of a number of cities across the globe under the microscope. The findings reveal that current smart city efforts are not adequate to combat the challenges of the Anthropocene epoch-that is already upon us. This paper concludes with a consolidated definition of smart and sustainable cities and considerations for moving towards Post-Anthropocentric urbanism-that is truly smart and sustainable urbanism-to avoid an imminent urban ecocide.

Granulites of northern korea (한반도 북부의 백립암)

  • Glebovitsky, V.A.;Sedova, I.S.;Bushmin, S.A.;Vapnik, Ye.A.;Buiko, A.K.
    • The Journal of the Petrological Society of Korea
    • /
    • v.3 no.3
    • /
    • pp.196-219
    • /
    • 1994
  • Granulite complexes in northern (the Nangnim block), eastern (ther Kimchaek zone of the Macheonryong belt) and southern (separate windows among upper Proterozoic structure such as the Wonsan, Nampo and Haeju granulites) parts of the Northern Korea are studied. Multistage deformations, metamorphic and migmatitic events, and granite formations are recognized in these granulite complexes. Mineral thermobarometry and fluid inclusion investigationss are used to establish the P-T evolutionary trends during prograde and retrograde metamorphic events. The peak metamorphism of granulites is characterized by temperature near $800^{\circ}C$ and pressure near 5.5-6 kb. Retrograde evolution includes cooling at constant pressure or with variable pressure ranging up to 7-8 kb. This P-T change corresponds to the transition from high to moderate or low geothermal gradient. The subsequent cooling is ac-companied by significant decompression to 3-4 kb.

  • PDF