• Title/Summary/Keyword: interaction theory

Search Result 1,480, Processing Time 0.039 seconds

Bargaining Game using Artificial agent based on Evolution Computation (진화계산 기반 인공에이전트를 이용한 교섭게임)

  • Seong, Myoung-Ho;Lee, Sang-Yong
    • Journal of Digital Convergence
    • /
    • v.14 no.8
    • /
    • pp.293-303
    • /
    • 2016
  • Analysis of bargaining games utilizing evolutionary computation in recent years has dealt with important issues in the field of game theory. In this paper, we investigated interaction and coevolution process among heterogeneous artificial agents using evolutionary computation in the bargaining game. We present three kinds of evolving-strategic agents participating in the bargaining games; genetic algorithms (GA), particle swarm optimization (PSO) and differential evolution (DE). The co-evolutionary processes among three kinds of artificial agents which are GA-agent, PSO-agent, and DE-agent are tested to observe which EC-agent shows the best performance in the bargaining game. The simulation results show that a PSO-agent is better than a GA-agent and a DE-agent, and that a GA-agent is better than a DE-agent with respect to co-evolution in bargaining game. In order to understand why a PSO-agent is the best among three kinds of artificial agents in the bargaining game, we observed the strategies of artificial agents after completion of game. The results indicated that the PSO-agent evolves in direction of the strategy to gain as much as possible at the risk of gaining no property upon failure of the transaction, while the GA-agent and the DE-agent evolve in direction of the strategy to accomplish the transaction regardless of the quantity.

BIOLOGICAL STUDIES IN CHILD AND ADOLESCENT DEPRESSION (소아 ${\cdot}$ 청소년 우울장애의 생물학적 연구)

  • Cho, Soo-Churl
    • Journal of the Korean Academy of Child and Adolescent Psychiatry
    • /
    • v.5 no.1
    • /
    • pp.28-35
    • /
    • 1994
  • Research on biological aspects on adult depression has been subjected to more than 25 years of systematic research, while biologic investigations regarding childhood and adolescent depression are only now being initiated. Although no unifying, explanatory theory of the biologic etiology of childhood depression emerges from the results of studies reviewed above, the findings do support that biological factors may be involved in the genesis of childhood depression. The research reviewed in this paper suggests that age and pubertal factors have major effects in most biological markers of depression. Some of these markers, like sleep EEG and neuroendocrine markers should be broken down by decades during adult life span. Thus, although adult data are very valuable points of departure for biological research on child and adolescent depression, it is very hard to transfer the adult data to prepubertal children and adolescents, ignoring the biological changes that take place in growth and development, pubety and aging. A great deal of work in basic developmental neuroscience remains to be done. It will be crucial for further advances in this field to determine the normal patterns of neurotransmitter interaction in this age group and to study children at high risk for depression. It will be also crucial to use primate models of depressive illness in order to be able to answer the many queations that cannot be investigated in humans for ethical issues. Conclusively, much closer collaboration between developmental and neurobiological and behavioral studies in primates and in humans will be essential for further development.

  • PDF

Nonstoichiometry and Physical Properties of the Perovskite $CaGa_{1-x}Fe_xO_{3-y}$ System (페롭스카이트 $CaGa_{1-x}Fe_xO_{3-y}$계의 비화학량론과 물리적 성질)

  • Rho, Kwon Sun;Ryu, Kwang Hyun;Chang, Soon Ho;Yo, Chul Hyun
    • Journal of the Korean Chemical Society
    • /
    • v.40 no.5
    • /
    • pp.295-301
    • /
    • 1996
  • A series of solid solutions of the $CaGa_1-xFexO_3-y$ system with the compositions of x=0.25, 0.50, 0.75, and 1.00 has been prepared at $1150^{\circ}C$ under an atmospheric air pressure. The structure, nonstoichiometric chemical formula, and the distribution of cations for the solid solutions are determined by X-ray diffraction analysis, Mohr salt titration, Mossbauer spectroscopic analysis. Their physical properties are discussed with electrical conductivity and magnetic measurements. The crystal system of all the compositions is a brownmillerite orthorhombic system from the X-ray diffraction analysis and the reduced lattice volume increases linearly with x value except that of the composition of x=0.25. All the solid solutions do not contain $Fe^{4+}$ ion and the mole number of oxygen vacancies or y value is 0.50 from Mohr salt analysis. The oxidation state of Fe ion, the coordination state, the structure change in the Brownmillerite-type structure, and the distribution of $Ga^{3+}$ and $Fe^{3+}$ ions are discussed with Mossbauer spectroscopic analysis. The electrical conductivity increases and activation energy decreases, as x value increases. The traditional semiconducting property of this system is described in terms of band theory. The compositions of x=0.50∼1.00 show a thermal magnetic hysteresis in the magnetic measurement with the cooling conditions, which is discussed in terms of the space group and Dzyaloshinsky-Moriya interaction.

  • PDF

The Influence of Experiential Marketing for the Agricultural 6th Industry on the Revisit Intention (농업6차산업 체험 마케팅이 재방문의도에 미치는 영향)

  • Kang, Duck-boung
    • Journal of Venture Innovation
    • /
    • v.2 no.1
    • /
    • pp.119-130
    • /
    • 2019
  • In this study, we intend to test whether experience variables such as sense, feel, think, relate, and action experiential activities of farming village can be usefully applied to revisit intention. As a result, we found that the sense, relate, and action experiences were adopted, while the feel and think variables were rejected, leading to the conclusion that Schmitt's (1999) experiential marketing theory was also applied to 6th industry experience marketing activities in rural areas. Therefore, the significant effect of rural experience activities on revisiting intention is thought to be related to the fact that they stimulated sensitivities by drawing attention and interest of consumers during the 6th industrial experience configuration, and to the environmental facilities connected to the experience site. The Feel experience has been rejected due to limitation of development of emotional element from the 6th industry certification business experience program, leading to the necessicity for development of a program that can stimulate the consumer's emotions. The reason why the Think experience was rejected is that the experience of the rural area 6th industry did not create surprises or curiosity, and thus does not meet the expectations of consumers. In case of relational experience, experiential marketing through social organizational relationship formation is expanding, and in case of behavioral experience, experience of 6th industry constitutes experience related to interaction with others and lifestyle.

The Daily Life of University Student Athletes (대학 운동부 특기자 학생들의 일상 경험)

  • Kim, Dong-Kee
    • Journal of the Korea Convergence Society
    • /
    • v.9 no.2
    • /
    • pp.359-369
    • /
    • 2018
  • This study tried to illustrate the process of the experiences of university student athletes in campus who are engaged in study and sports. it is aimed to interpret and describe the everyday life of athlete students, and establishing a desirable human talent and to set the right necessary direction for the education of athlete students. For this, it selected 10 research participants as student athletes in J University located in Chungcheongnam-do and collected data through an in-depth interview. As for the data analysis, concepts were derived according to the grounded theory analysis method suggested by [10] and the research results composing the coding paradigm to clarify the relations between concepts are as following. First, 120 concepts, 17 subcategories, and 10 upper categories were deducted in the open coding. Second, the contextual factors of the campus life motive were "participation in sports" and "participation in study" and the central phenomena were regarded as "the significance of campus life in which study and sports run parallel. The conditions of arbitration were summarized as 'formation of my relations" and "ability improvement" in sports and study, and the operation/interaction strategy were categorized as "importance of study" and "negative thinking." As for the last result, "reflecting campus life", "my own identity", and "planning future" were categorized, and it is judged that the application of the policy to improve the ability of student athletes that comprehend all study and sports.

Review and Prospects on International Physical Distribution Studies of Geography in the Globtlization Era (세계화 시대의 국제물류 연구동향과 과제)

  • 한주성
    • Journal of the Economic Geographical Society of Korea
    • /
    • v.1 no.1
    • /
    • pp.57-74
    • /
    • 1998
  • Recently. the interest in Physical distribution has increased in economic geography This paper aims to review and prospect the internatonal physical distribution studies of international trade and international freight flows. And it has examined the changes in methodology of international physical distribution. Author has defined international physical distribution as the physical distribution of international trade and international freight flow The results are as follows : (1) As the methodology of international physical distribution studies developes, the physical distribution should be recognized not only as transportation phenomenon but also as total logistics which is understood as the combination of production and consumption including information flow. (2) The studies about model of international physical distribution flow ill need to study regional relations including urban, in the future. And economic geography and location theory adding culture and behaviour elements will be restructured, because not only state but also multinational corporation appear as trade subject in global economy. (3) The studies for the relation of habor and its hinterland in Physical distribution need to analyze the factors causing habor use with decision-making behaviour of corporation. (4) After oil crisis. as air freight is important, the studies for hinterland and foreland of freight centering international airport are needed because of necessity of light and small freight. flexible Production system, free trade, and high speed freight transportation of freshing food and flowers and so forth.

  • PDF

The Effects of Fan Citizenship behavior to Sports team value and Local Community value on Spectator Sports (관람스포츠에서의 팬시민행동이 구단가치와 지역사회가치에 미치는 영향)

  • Lee, Jong-Ho;Yun, Dae-Hong;Kang, Min-Seok
    • Management & Information Systems Review
    • /
    • v.30 no.4
    • /
    • pp.385-414
    • /
    • 2011
  • Fans' role and influence is becoming more extensive in these days' complex and competitive sports market. This research considers fans as internal members of sports team, employee and confirms active and voluntary fan citizenship behavior's effects on team, community, and social exchange among community residents, so that an enterprise can increase accessibility from many-sided perspectives when establishing sports marketing strategy in the future. The concept of fan citizenship behavior is set up considering characteristic of sports industry based on employee's organizational citizenship behavior discussed from the internal marketing and organization theory and preliminary studies about client citizenship behavior mentioned from service industry area. Although the sixteen research hypothesis are not fully supported. The results are summarized as follows. These findings give theoretical and marketing implication to future researcher and marketer. First, fan's positive aspect is confirmed which is different from general consumer by examining fan citizenship behavior's effect on teal value in the sports industry. Second, it was confirmed that the team needs marketing strategies about not only relationship between each individual fan, but also interaction between fans in the future. Third, it was confirmed that direct fan's behavior as well as individual fan's cognitive area have effects on team's and social value.

  • PDF

A Development of Method for Surface and Subsurface Runoff Analysis in Urban Composite Watershed (I) - Theory and Development of Module - (대도시 복합유역의 지표 및 지표하 유출해석기법 개발 (I)- 이론 및 모듈의 개발 -)

  • Kwak, Chang-Jae;Lee, Jae-Joon
    • Journal of Korea Water Resources Association
    • /
    • v.45 no.1
    • /
    • pp.39-52
    • /
    • 2012
  • Surface-subsurface interactions are an intrinsic component of the hydrologic response within a watershed. In general, these interactions are considered to be one of the most difficult areas of the discipline, particularly for the modeler who intends simulate the dynamic relations between these two major domains of the hydrological cycle. In essence, one major complexity is the spatial and temporal variations in the dynamically interacting system behavior. The proper simulation of these variations requires the need for providing an appropriate coupling mechanism between the surface and subsurface components of the system. In this study, an approach for modelling surface-subsurface flow and transport in a fully intergrated way is presented. The model uses the 2-dimensional diffusion wave equation for sheet surface water flow, and the Boussinesq equation with the Darcy's law and Dupuit-Forchheimer's assumption for variably saturated subsurface water flow. The coupled system of equations governing surface and subsurface flows is discretized using the finite volume method with central differencing in space and the Crank-Nicolson method in time. The interactions between surface and subsurface flows are considered mass balance based on the continuity conditions of pressure head and exchange flux. The major module consists of four sub-module (SUBFA, SFA, IA and NS module) is developed.

Railway Governance and Power Structure in China

  • Lee, Jinjing
    • International Journal of Railway
    • /
    • v.1 no.4
    • /
    • pp.129-133
    • /
    • 2008
  • Over the last $15{\sim}20$years, many countries have adopted policies of railway privatization to keep up with increasing competition from road and air transport. Although each country and case has its own history, market characteristics, political context as well as administrative process, railway privatizations (including railway restructure, concession etc.) in the west usually are accompanied with the establishment of new regulatory regimes. Therefore, railway governance has been innovating towards an interaction of government, regulator, industry bodies, user groups, trade unions and other interested groups within the regulatory framework. However, it is not the case in China. Although China had seen a partial privatization in some branch lines and is experiencing a much larger-scale privatization by establishing joint-ventures to build and operate high-speed passenger lines and implementing an asset-based securitization program, administrative control still occupies absolutely dominant position in the railway governance in China. Ministry of Railway (MOR) acts as the administrator, operator as well as regulator. There is no national policy that clearly positions railway in the transportation network and clarifies the role of government in railway development. There is also little participation from interested groups in the railway policy making, pricing, service standard or safety matter. Railway in China is solely governed by the mere executive agency. Efficiency-focused economic perspective explanation is far from satisfaction. A wider research perspective from political and social regime is of great potential to better explain and solve the problem. In the west, separation and constrains of power had long been established as a fundamental rule. In addition to internal separation of political power(legislation, execution and jurisdiction), rise of corporation in the 19th century and association revolution in the 20th century greatly fostered the growth of economic and social power. Therefore, political, social and economic organizations cooperate and compete with each other, which leads to a balanced and resonable power structure. While in China, political power, mainly party-controlled administrative power has been keeping a dominated position since the time of plan economy. Although the economic reform promoted the growth of economic power of enterprises, it is still not strong enough to compete with political power. Furthermore, under rigid political control, social organizations usually are affiliated to government, independent social power is still too weak to function. So, duo to the limited and slow reform in political and social regime in China, there is an unbalanced power structure within which political power is dominant, economic power expanding while social power still absent. Totally different power structure in China determines the fundamental institutional environment of her railway privatization and governance. It is expected that the exploration of who act behind railway governance and their acting strength (a power theory) will present us a better picture of railway governance as a relevant transportation mode. The paper first examines the railway governance in China and preliminarily establishes a linkage between railway governance and its fundamental institutional environment, i.e. power structure in a specific country. Secondly, the reason why there is no national policy in China is explored in the view of political power. In China, legislative power is more symbolic while party-controlled administrative power dominates political process and plays a fundamental role in Chinese railway governance. And then, in the part three railway finance reform is analyzed in the view of economic power, esp. the relationship of political power and economic power.

  • PDF

Default Risk Mitigation Effect of Financial Structure and Characteristic in BOT Project Finance (BOT 프로젝트 파이낸스의 금융구조 및 특성의 채무불이행 위험완화 효과)

  • Jun, Jae-Bum;Lee, Jae-Sue;Lee, Sam-Su
    • Korean Journal of Construction Engineering and Management
    • /
    • v.12 no.2
    • /
    • pp.121-132
    • /
    • 2011
  • One of the advantages of BOT PF(Project Finance) is the government can be protected from risks involved in projects as the private finances, builds, and operates relevant projects. Moreover, the private may avoid outstanding responsibility in case of default thanks to BOT PF's unique financial structure and characteristics. However, despite increasing attention on risk mitigation effect of financial structure and characteristic of BOT PF to default risk with emerging controversies of capital crunch, introduction of IFRS, and contingent liabilities, valuation of default risk mitigation effect caused by financial structure and characteristics of BOT PF still seems sophisticated due to uncertain cash flows, complexly layered contracts, and their interaction. So, this paper is to show the theoretical frame to assess the default risk mitigation effect of financial structure and characteristic of BOT PF with option pricing and related financial economic theories and to provide some meaningful implications. Finally, this research shows that the financial structure and characteristics of BOT PF help mitigate the default risk and default risk mitigation effect increases as change of relevant variables on financial feasibility gets the BOT project less financially feasible.