• 제목/요약/키워드: I-O tables

검색결과 29건 처리시간 0.024초

Development of ICT as an evolutionary process

  • Hwang, Gyu-hee
    • 기술혁신학회지
    • /
    • 제5권2호
    • /
    • pp.189-211
    • /
    • 2002
  • The research shows how the technological change of 'Information and Communication Technology' (ICT) is accompanied with the usage change. It aims to provide a better conceptualization with empirical findings about the fact that the technological development of ICT is a convergence process of ICT factors with the usage of ICT moving from a limited coverage toward a general-purpose. The research adapts a descriptive methodology on a historical matter and demonstrates how it can be conducted through analytical description of Input-Output tables (I/O) the over periods. The case is about the UK with sequential I/O during 1970s- 90s.

  • PDF

농촌관광 위성계정의 작성방법 (A Methodological Approach of Estimating Rural Tourism Satellite Accounts)

  • 김현숙;서영창;이종상
    • 농촌지도와개발
    • /
    • 제22권3호
    • /
    • pp.285-292
    • /
    • 2015
  • Recently, the demand of rural tourism has been increased to promote farm household income and rural economy. Korean government has supported to promote rural tourism. One of the most difficult tasks in estimating the economic impact of the tourism industry is how the industry should be defined in terms of an economic sector, since tourism is not defined in national Input-Output (I-O) tables or in the Standard Industrial Classification code. Moreover, there is no specified Standard Industrial Classification for rural tourism. The purpose of the study aims to examine specified Standard Industrial Classification of rural tourism using the I-O model analysis to estimate the economic impacts of rural tourism. Results showed that there were two components considered as inputs. One is the inputs that final demand can move to input of rural tourism in I-O tables. The other is one that the final demand was provided by farm household as intermediate inputs.

Half-space albedo problem for İnönü, linear and quadratic anisotropic scattering

  • Tureci, R.G.
    • Nuclear Engineering and Technology
    • /
    • 제52권4호
    • /
    • pp.700-707
    • /
    • 2020
  • This study is concerned with the investigation of the half-space albedo problem for "İnönü-linear-quadratic anisotropic scattering" by the usage of Modified FN method. The method is based on Case's method. Therefore, Case's eigenfunctions and its orthogonality properties are derived for anisotropic scattering of interest. Albedo values are calculated for various linear, quadratic and İnönü anisotropic scattering coefficients and tabulated in Tables.

국내 생물산업의 구조분해분석 (An Input-output Structural Decomposition Analysis of Korean Biotechnology Industry)

  • 정미애;허은녕
    • KSBB Journal
    • /
    • 제18권5호
    • /
    • pp.356-362
    • /
    • 2003
  • 생물공학기술을 이용하여 제품과 서비스를 창출하는 산업을 생물산업이라고 한다. 우리나라는 1999년부터 산업자원부가 생물산업의 범위를 8개 부문으로 분류하고 있으나 산업분류와 제품 분류, 기술 분류의 기준이 섞여 있어 통계자료를 이용한 현황 파악이 어려운 실정이다. 본 연구에서는 국내 생물산업의 현황 파악을 위해 한국생물산업협회의 매출조사자료를 근거로 하였다. 국내 생물산업제품의 상당수가 기존 산업의 수요구조를 따르는 것으로 가정하고 1985-90-95년의 접속불변산업연관표에서 국내 생물산업분야를 생물의약분야, 생물화학분야, 바이오식품분야, 생물농업분야, 생물공정 및 환경분야의 6개 분야로 분류ㆍ선정하였다. 1985년에서 1995년 기간의 최종재수요구조, 중간재 수요구조, 수입구조 등의 변화가 산출액 변화에 미친 기여도를 분석하기위해 변화요인을 크게 경제성장에 의한 효과와 수요구조변화에 의한 효과로 나눈 후 수요구조변화에 Syrquin 구조분해모형을 이용하였다. 분석결과 생물산업의 세부 각 분야들은 다양한 성장배경을 가지고 있으며 바이오식품과 생물농업분야를 제외한 생물산업분야는 사회적 수요가 성장을 이끌어왔음을 확인하였다. 또한 각 분야별 민간수요변화에 대한 대응과 수입ㆍ수출구조의 개선이 산업 성장에 필요함을 알 수 있었다.

Die Leibniz' $bin\ddot{a}re$ Arithmetik und das I-Ching' Symbolik der Hexagramme vom Standpunkt der modernen Logik

  • Bae, Sun-Bok
    • 논리연구
    • /
    • 제5권1호
    • /
    • pp.147-157
    • /
    • 2001
  • In this study I try to show some numerical analogy between Leibniz's binary system anc I-ching's symbolic system of duo rerum principia, imagines quator, octo figurae am 64 hexagrams. But, there is really a formal logical accordance in their symbolic foundations, on which are based especially the Wittgenstein's 16 truth-tables in his Tractatus-logico-philosophicus(5.101) am 16 hexagrams, as long as we interpret with the binary values 0 am 1, i.e. the Bi-Polarity, the logical tradition from J. Boole, G. Frege through B. Russell and AN. Whitehead to R. Wittgenstein. So, I argue that the historical and theoretical root of that tradition goes back to the debate between Bouvet and Leibniz about the mathematical structure of I-ching' symbols and the Leibnizian binary arithmetic. In the letter on 4. 11. 1701 from Peking to Leibniz, Bouvet wrote that the I-Ching's symbolism has an analogous structure with Leibniz's binary arithmetic. Corresponding to his suggestion, but without exact knowledge, in the letter of 2. January 1967 to the duke August in Braunschweig-Lueneburg-Wolfenbuettel had Leibniz shown already an original idea for the creation of the world with imago Dei which comes from binary progression, dark and light on water.

  • PDF

Diffusion of ICT from the view of ICT generation: The experience in the UK during the 1980s

  • Hwang, Gyu-hee
    • 한국기술혁신학회:학술대회논문집
    • /
    • 한국기술혁신학회 2001년도 춘계학술대회:발표자료
    • /
    • pp.205-242
    • /
    • 2001
  • This paper aims to provide a better understanding about how Information and Communication technology (ICT) has diffused. The investigation is conducted with the consideration of ICT evolution in terms of technological change and usage pattern. The definition used is presented as 'the ICT is a process of convergence of technologies between information-processing and information-transforming technologies, mainly due to the advent of microelectronlcs'. After examining technological changes of ICT, the diffusion path of ICT is traced through the usage ratio in total input and/or investment based on Input-Output tables (I-O). It shows that the evolution of ICT from the change of usage pattern is an up-and-down usage pattern rather than a uni-modal usage time path. With this recognition, the diffusion index is prepared. JEL classification : C43, L63, O33.

  • PDF

데이터베이스 압축 성능 향상을 위한 선택적 압축 전략 (A Selective Compression Strategy for Performance Improvement of Database Compression)

  • 이기훈
    • 정보처리학회논문지:소프트웨어 및 데이터공학
    • /
    • 제4권9호
    • /
    • pp.371-376
    • /
    • 2015
  • 사물인터넷 (IoT)은 데이터의 양을 상당히 증가시킨다. 데이터베이스 압축은 저장 시스템 비용과 I/O 대역폭을 절약할 수 있기 때문에 빅데이터에 있어서 중요하다. 그러나 데이터베이스 압축은 압축된 페이지에 대한 업데이트로 인해 OLTP와 같은 쓰기 집중적인 워크로드에 대해 낮은 성능을 보일 수 있다. 본 논문에서는 데이터베이스 압축의 성능 향상을 위한 실용적 가이드라인을 제시한다. 특히, 압축 페이지 크기에 의한 계산으로부터 예상되는 공간 절약과 거의 같은 공간 절약을 보이는 테이블들만을 압축하는 SELECTIVE 전략을 제시한다. TPC-C 벤치마크와 MySQL을 이용한 실험을 통해 SELECTIVE 전략이 압축하지 않는 방법에 비해 1.1배 높은 성능을 보이면서 17.3%의 공간을 절약한다는 것을 보였다.

Anticipatory I/O Management for Clustered Flash Translation Layer in NAND Flash Memory

  • Park, Kwang-Hee;Yang, Jun-Sik;Chang, Joon-Hyuk;Kim, Deok-Hwan
    • ETRI Journal
    • /
    • 제30권6호
    • /
    • pp.790-798
    • /
    • 2008
  • Recently, NAND flash memory has emerged as a next generation storage device because it has several advantages, such as low power consumption, shock resistance, and so on. However, it is necessary to use a flash translation layer (FTL) to intermediate between NAND flash memory and conventional file systems because of the unique hardware characteristics of flash memory. This paper proposes a new clustered FTL (CFTL) that uses clustered hash tables and a two-level software cache technique. The CFTL can anticipate consecutive addresses from the host because the clustered hash table uses the locality of reference in a large address space. It also adaptively switches logical addresses to physical addresses in the flash memory by using block mapping, page mapping, and a two-level software cache technique. Furthermore, anticipatory I/O management using continuity counters and a prefetch scheme enables fast address translation. Experimental results show that the proposed address translation mechanism for CFTL provides better performance in address translation and memory space usage than the well-known NAND FTL (NFTL) and adaptive FTL (AFTL).

  • PDF

농촌관광마을 육성사업의 경제적 파급효과 분석 (The Economic Impact Analysis of Rural Tourism Development Projects)

  • 손은호;박덕병;윤준상
    • 농촌지도와개발
    • /
    • 제21권3호
    • /
    • pp.155-179
    • /
    • 2014
  • 산업연관분석은 현재 관광산업의 경제적 파급효과를 분석하는 데 널리 사용되고 있다. 이 연구는 소득과 고용의 측면에서 지역개발에 영향을 미치는 농촌관광마을 육성사업의 경제적 파급효과를 분석하는 데 그 목적이 있다. 이를 위하여 한국은행(2011)에서 작성한 산업연관표(2009)를 이용하여 농촌관광의 생산, 소득, 고용, 부가가치 승수를 도출하였다. 산업연관모형에 의한 경제적 파급효과 분석결과, 2011년 농촌관광개발로 인한 직간접 및 유발 생산파급액은 1조 3,872억 원, 소득파급액은 2,872억 원, 부가가치파급액은 2,754억 원, 고용자는 41,127명에 이르는 것으로 나타났다. 특히 음식점업의 생산과 고용승수는 타 산업에 비하여 높은 반면, 소득 및 부가가치승수는 타 산업에 비하여 낮은 것으로 나타났다. 이러한 결과는 음식점업이 노동집약적인 산업으로 고용창출효과가 높은 산업이라는 것을 시사해주고 있다.

INCREMENTAL INDUCTIVE LEARNING ALGORITHM IN THE FRAMEWORK OF ROUGH SET THEORY AND ITS APPLICATION

  • Bang, Won-Chul;Bien, Zeung-Nam
    • 한국지능시스템학회:학술대회논문집
    • /
    • 한국퍼지및지능시스템학회 1998년도 The Third Asian Fuzzy Systems Symposium
    • /
    • pp.308-313
    • /
    • 1998
  • In this paper we will discuss a type of inductive learning called learning from examples, whose task is to induce general description of concepts from specific instances of these concepts. In many real life situations, however, new instances can be added to the set of instances. It is first proposed within the framework of rough set theory, for such cases, an algorithm to find minimal set of rules for decision tables without recalculation for overcall set of instances. The method of learning presented here is base don a rough set concept proposed by Pawlak[2][11]. It is shown an algorithm to find minimal set of rules using reduct change theorems giving criteria for minimum recalculation with an illustrative example. Finally, the proposed learning algorithm is applied to fuzzy system to learn sampled I/O data.

  • PDF