• 제목/요약/키워드: Collective matrix

검색결과 12건 처리시간 0.023초

Evaluation criterion for different methods of multiple-attribute group decision making with interval-valued intuitionistic fuzzy information

  • Qiu, Junda;Li, Lei
    • KSII Transactions on Internet and Information Systems (TIIS)
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    • 제12권7호
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    • pp.3128-3149
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    • 2018
  • A number of effective methods for multiple-attribute group decision making (MAGDM) with interval-valued intuitionistic fuzzy numbers (IVIFNs) have been proposed in recent years. However, the different methods frequently yield different, even sometimes contradictory, results for the same problem. In this paper a novel criterion to determine the advantages and disadvantages of different methods is proposed. First, the decision-making process is divided into three parts: translation of experts' preferences, aggregation of experts' opinions, and comparison of the alternatives. Experts' preferences aggregation is considered the core step, and the quality of the collective matrix is considered the most important evaluation index for the aggregation methods. Then, methods to calculate the similarity measure, correlation, correlation coefficient, and energy of the intuitionistic fuzzy matrices are proposed, which are employed to evaluate the collective matrix. Thus, the optimal method can be selected by comparing the collective matrices when all the methods yield different results. Finally, a novel approach for aggregating experts' preferences with IVIFN is presented. In this approach, experts' preferences are mapped as points into two-dimensional planes, with the plant growth simulation algorithm (PGSA) being employed to calculate the optimal rally points, which are inversely mapped to IVIFNs to establish the collective matrix. In the study, four different methods are used to address one example problem to illustrate the feasibility and effectiveness of the proposed approach.

범용 병렬화일 시스템 상에서 MPI-IO 방안의 성능 평가 벤티마크 (Benchmarks for Performance Testing of MPI-IO on the General Parallel File System)

  • 박성순
    • 정보처리학회논문지A
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    • 제8A권2호
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    • pp.125-132
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    • 2001
  • IBM developed the MPI-IO, we call it MPI-2, on the General Parallel File System. We designed and implemented various Matrix Multiplication Benchmarks to evaluate its performances. The MPI-IO on the General Parallel File System shows four kinds of data access methods : the non-collective and blocking, the collective and blocking, the non-collective and non-blocking, and the split collective operation. In this paper, we propose benchmarks to measure the IO time and the computation time for the data access methods. We describe not only its implementation but also the performance evaluation results.

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An Efficient Correction Storage Scheme for Unsteady Flows

  • Kim, Youn J.;Cheong, Jo-Soon
    • Journal of Mechanical Science and Technology
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    • 제15권1호
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    • pp.125-138
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    • 2001
  • An efficient correction storage scheme on a structured grid is applied to a sequence of approximate Jacobian systems arising at each time step from a linearization of the discrete nonlenear system of equations, obtained by the implicit time discretization of the conservation laws for unsteady fluid flows. The contribution of freezing the Jacobian matrix to computing costs is investigated within the correction storage scheme. The performance of the procedure is exhibited by measuring CPU time required to obtain a fully developed laminar vortex shedding flow past a circular cylinder, and is compared with that of a collective iterative method on a single grid. In addition, some computed results of the flow are presented in terms of some functionals along with measured data. The computational test shows that the computing costs may be saved in favor of the correction storage scheme with the frozen Jacobian matrix, to a great extent.

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Performance Optimization of Parallel Algorithms

  • Hudik, Martin;Hodon, Michal
    • Journal of Communications and Networks
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    • 제16권4호
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    • pp.436-446
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    • 2014
  • The high intensity of research and modeling in fields of mathematics, physics, biology and chemistry requires new computing resources. For the big computational complexity of such tasks computing time is large and costly. The most efficient way to increase efficiency is to adopt parallel principles. Purpose of this paper is to present the issue of parallel computing with emphasis on the analysis of parallel systems, the impact of communication delays on their efficiency and on overall execution time. Paper focuses is on finite algorithms for solving systems of linear equations, namely the matrix manipulation (Gauss elimination method, GEM). Algorithms are designed for architectures with shared memory (open multiprocessing, openMP), distributed-memory (message passing interface, MPI) and for their combination (MPI + openMP). The properties of the algorithms were analytically determined and they were experimentally verified. The conclusions are drawn for theory and practice.

웜홀 방식의 네트워크에서 효율적인 다대다 개별적 통신 알고리즘 (Efficient All-to-All Personalized Communication Algorithms in Wormhole-Routed Networks)

  • 김시관;강오한;정종인
    • 한국정보과학회논문지:시스템및이론
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    • 제30권7_8호
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    • pp.359-369
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    • 2003
  • 본 논문에서는 웜홀 라우팅 방식을 사용한 2차원 토러스에서 다대다 개별적 통신에 대한 효율적인 알고리즘을 제시한다. 다대다 개별적 통신은 집합체 통신(Collective Communication)의 일종으로 행렬 전이, FFT, 흑은 분산 테이블 검색과 같은 많은 응용 분야에 적용이 되고 있다. 이에 대한 연구는 망의 크기가 2의 멱승 혹은 4의 배수인 경우에 대한 알고리즘이 제시가 되었지만 그 크기가 일반적인 경우에 대해서는 아직은 제안되고 있지 않고 있다. 본 논문에서는 먼저 망의 크기가 2의 배수인 경우에 대한 다대다 개별적 통신에 대한 Double-Hop-2D 알고리즘을 제안한 다음 이 알고리즘을 확장하여 임의의 노드 수에 적합한 2개의 알고리즘을 제안한다. Split-and-Merge 알고리즘은 전체망을 4개의 지역으로 분할하여 각 분할된 영역이 독립적으로 영역별로 다대다 개별적 통신을 수행한 후 그 결과를 다시 결합하는 단계로 구성되어 있다. Modified Double-Hop-2D 알고리즘은 기본이 되는 Double-Hop-2D 알고리즘에서 추가적인 작업을 수행함으로써 다대다 개별적 통신을 수행한다. 마지막으로 망의 크기가 일반적인 경우에 Modified Double-Hop-2D 알고리즘이 Split-and-Merge 알고리즘보다 성능이 우수함을 보인다.

뤼 뒤 박 발현 성모상의 분석심리학적 고찰: 신성의 육화로서의 성모상 (An Analytical Study on the Apparition of Virgin Mary of Rue du Bac: The Virgin Mary as the Incarnation of the Divinity)

  • 김기환;김정택
    • 심성연구
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    • 제38권1호
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    • pp.45-111
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    • 2023
  • 본 논문은 1830년 프랑스 파리 뤼 뒤 박에서 발현한 성모상을 분석심리학적으로 고찰하고 있다. 이를 위해, 중세기 연금술서 『로이즈너의 판도라』(1588)에 실려 있는 '성모 마리아의 대관식으로 묘사된 육체의 신성화'라는 제목의 그림을 전거로 삼아 성모상에 드러나는 원형적 모티프들을 확충하였다. 이 성모상에는 융 심리학의 핵심 개념인 개성화의 과정과 결과를 보여주는 원형적 모티프들이 집약되어 나타난다. 판도라 그림이나 발현 성모상에서 나타나는 개성화 과정을 표현하는 이런 상징들은 집단적 무의식을 구성하는 신화소들의 표현이다. 융은 이 신화소들이 모든 종교의 궁극적인 바탕이며 모체로 보았다. 발현한 성모상에 나타나는 신화소들을 살펴볼 때, 성모 발현 현상은 집단적 무의식에 배열된 자기 원형상이 시공간의 영역, 즉 시간과 공간을 인지 범주로 삼고 있는 목격자 개인의 의식에 나타난 것이다. 뤼 뒤 박 성모상은 그리스도교의 십자고상(十字苦像) 상징에서 충분히 표현되지 못했던 신성과 인간성의 대극 융합을 보여준다. 이런 의미에서 보면, 발현한 성모상은 물병자리 시대를 여는 새로운 구세주의 상이다. 성모상은 신성이 인간의 내면으로부터 기원하며, 따라서 육체를 지닌 각각의 인간이 신성을 육화하는 바탕이며 심리학적 구원의 주체임을 보여준다. 성모상은 그리스도교가 지닌 영적인 가치가 급격하게 감소하는 시대에 인간의 정신이 담지하고 있는 신성의 가치를 일깨워 준다.

The Future of Workplace in Vertical Cities: Hanging Gardens, Roof Terraces and Vertical Plazas

  • Reinke, Stephan C.
    • 국제초고층학회논문집
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    • 제9권1호
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    • pp.71-79
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    • 2020
  • As the workplace evolves in our vertical cities, the need for "think spaces" and the public realm to meet, create and innovate will become integral to tall buildings. These people places are designed to address the social challenges and enhance the co-working environments which are emerging in the dense urban context of our future cities. The design of sky terraces and the "spaces between" offer a greener, more humane and smarter work environment for the future. The public realm should no longer be held down, fixed to the ground plane, but rather become part and parcel of the upper levels of our workplace centers. These collective spaces in our workplace centers must provide a three dimensional matrix of connected and identifiable platforms to leverage the open and progressive future way of working. This will enable social networking and idea sharing, and create multi-dimensional, multi-level business incubators for innovation and creativity. The BCO ( British Council of Offices) has performed a landmark Wellness Matters Report which provides an exemplary roadmap for the future of the workplace. Our future vertical cities must also provide for serendipity in the workplace; a key attribute to drive the information exchange and collaboration that are proven to provide positive and progressive business outcomes. In addition to demonstrating examples of existing built work and the concept of the integrated vertical public realm, the presentation also will consider and define wellness in the workplace as a critical factor in our design strategies and our future workplace environments Hanging Gardens, Roof Terraces and the Vertical Plazas; designed for interchange, wellness, animation and collaboration.

Megakaryocyte-Derived IL-8 Acts as a Paracrine Factor for Prostate Cancer Aggressiveness through CXCR2 Activation and Antagonistic AR Downregulation

  • Sadan, Dahal;Prakash, Chaudhary;Yi-Sook, Jung;Jung-Ae, Kim
    • Biomolecules & Therapeutics
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    • 제31권2호
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    • pp.210-218
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    • 2023
  • Prostate cancer is the fifth leading cause of cancer-related mortality in men, primarily because of treatment resistance, recurrence, and metastasis. In the present study, we investigated the role of paracrine interleukin-8 (IL-8) in the antagonistic expression of IL-8 and androgen receptor (AR), and the contribution of IL-8 to prostate cancer aggressiveness. In hormone-responsive LNCaP cells that do not express IL-8, recombinant IL-8 treatment significantly increased expressions of IL-8, CXC chemokine receptor 2 (CXCR2), matrix metalloproteinase (MMP)-2/9, Snail, and vimentin. IL-8 treatment significantly decreased AR and E-cadherin expression. IL-8-induced gene expression changes were suppressed by navarixin, a CXCR1/2 inhibitor, and gallein, a Gβγ inhibitor. In PC-3 androgen-refractory prostate cancer cells, IL-8 knockdown reduced expressions of CXCR2, MMP-2/9, Snail, and vimentin, and increased AR and E-cadherin expressions at the mRNA and protein levels. Co-culture with MEG-01 human megakaryocytic cells secreting high levels of IL-8 induced gene expression changes in both LNCaP and PC-3 cells, similar to those induced by IL-8 treatment. The altered gene expressions were accompanied by significant activation of transcription factor Snail in LNCaP and PC-3 cells. Treatment with the CXCR blocker navarixin inhibited the invasion of PC-3 cells but not LNCaP cells. However, invasion induced by MEG-01 was inhibited by navarixin in both LNCaP and PC-3 cells. The collective findings demonstrate that IL-8 enhances CXCR2 expression, which antagonistically regulates AR expression. More importantly, through changes in IL-8/CXCR2-regulated gene expression, IL-8 induces antiandrogen therapy resistance and epithelial-mesenchymal transition in prostate cancer.

미술과 집단성 (Art and Collectivity)

  • 곽건초
    • 미술이론과 현장
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    • 제4호
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    • pp.181-202
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    • 2006
  • "When it comes to art, nationalism is a goodticket to ride with", says the title of a report in the Indian Express (Mumbai, 29 Oct 2000). The newspaper report goes on to say that since Indian art was kept "ethnic" by colonialism, national liberation meant opening up to the world on India's own terms. Advocacy, at the tail end of the 20th century, would contrast dramatically with the call by Rabindranath Tagore, the founder of the academy at Santiniketan in 1901, to guard against the fetish of nationalism. "The colourless vagueness of cosmopolitanism," Tagore pronounced, "nor thefierce self-idolatry of nation-worship, is the goal of human history" (Nationalism, 1917). This contrast is significant on two counts. First is the positive aspect of "nation" as a frame in art production or circulation, at the current point of globalization when massive expansion of cultural consumers may be realized through prevailing communication networks and technology. The organization of the information market, most vividly demonstrated through the recent FIFA World Cup when one out of every five living human beings on earth watched the finals, is predicated on nations as categories. An extension of the Indian Express argument would be that tagging of artworks along the category of nation would help ensure greatest reception, and would in turn open up the reified category of "art," so as to consider new impetus from aesthetic traditions from all parts of the world many of which hereto fore regarded as "ethnic," so as to liberate art from any hegemony of "international standards." Secondly, the critique of nationalism points to a transnational civic sphere, be it Tagore's notion of people-not-nation, or the much mo re recent "transnational constellation" of Jurgen Habermas (2001), a vision for the European Union w here civil sphere beyond confines of nation opens up new possibilities, and may serve as a model for a liberated sphere on global scale. There are other levels of collectivity which art may address, for instance the Indonesian example of local communities headed by Ketua Rukun Tetangga, the neighbourhood headmen, in which community matters of culture and the arts are organically woven into the communal fabric. Art and collectivity at the national-transnational level yield a contrasting situation of, on the idealized end, the dual inputs of local culture and tradition through "nation" as necessary frame, and the concurrent development of a transnational, culturally and aesthetically vibrant civic sphere that will ensure a cosmopolitanism that is not a "colourless vagueness." In art historical studies, this is seen, for instance, in the recent discussion on "cosmopolitan modernisms." Conversely, we may see a dual tyranny of a nationalism that is a closure (sometimes stated as "ethno-nationalism" which is disputable), and an internationalism that is evolved through restrictive understanding of historical development within privileged expressions. In art historical terms, where there is a lack of investigation into the reality of multiple modernisms, the possibility of a democratic cosmopolitanism in art is severely curtailed. The advocacy of a liberal cosmopolitanism without a democratic foundation returns art to dominance of historical privileged category. A local community with lack of transnational inputs may sometimes place emphasis on neo-traditionalism which is also a double edged sword, as re kindling with traditions is both liberating and restrictive, which in turn interplays with the push and pull of the collective matrix.

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무의식의 창조성에 관한 하나의 고찰: 일련의 꿈을 중심으로 (A Consideration on Creativity of the Unconscious: Focusing on a Series of Dreams)

  • 김덕규
    • 심성연구
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    • 제38권2호
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    • pp.239-268
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    • 2023
  • 인류는 대재난(코로나, 전쟁, 지진 등)으로 파괴(혼돈)에 직면하였고, 새로운 복원을 기다리고 있다. 문명과 개체에게 있어서 창조 혹은 창조성은 정신적 발전에 필수적이다. 새로운 의식의 입장과 태도, 실재에 대한 새로운 적응이 인간 정신의 심층에서 절실히 요구될 때, 창조성은 한 개체를 갱신시키는 동인이다. 본 소고는 일련의 네 개의 꿈을 해석하면서, 꿈의 메시지가 제시하는 창조성의 본성과 특징에 대하여 탐색한 결과물이다. 먼저 동서양의 종교와 신화, 역사에서 창조성의 정의와 형태를 탐색하였다. 서양신화는 신으로부터 발화되는 창조 혹은 창조성에 대하여 언급하는 반면에, 고대 중국에서는 도의 움직임에 의한, 음양의 상호작용에 의하여 창조성이 발현되는 것으로 보았다. 동서양에서 창조는 형태적으로 무로부터의 창조 혹은 질료로부터 창조, 모체로부터 해체를 통한 창조 등이 있는데, 이는 심리학적으로 창조성 혹은 창조는 무한한 잠재력과 창조력의 모판인 무의식에서 기원함을 시사한다. 다음으로 두 번째 꿈의 통찰을 따라서 창조성의 특성을 기술하였고, 이는 초월적 기능과 '준거 틀을 넘어서기', 즉 초법성향을 통하여 창조성이 일어남을 살펴보았다. 셋째로, 무의식의 창조성은 재생을 목적으로 하며, 집단과 개인 안에서 자기 원형상의 갱신을 추동하는 것임을 탐색하였다. 궁극적으로 무의식의 창조성은 전체정신의 목표이자 전체가 되어가는 개성화를 지향한다. 무의식의 창조성을 실현하는 일은 두 번째 창조자로서 인간의 숙명이라 할 수 있다.