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이광근 사단법인 인문사회과학기술융합학회 2016 예술인문사회융합멀티미디어논문지 Vol.6 No.4
Recently, due to supply of smart phone and mobile devices, the research for a transaction model has been actively progress to deal with real-time transaction processing. The mobile recovery methods for database stability is very important because on the mobile main memory database system, the data loss will occur when passed the boundary between cells. In the mobile main memory recovery method, system performance could reduced by input and output for record the execution of the programs. So, the research for efficient recovery methods are truly required Logging and check-point effective recovery method to reduce input and output of mobile main memory database systems. In this paper, by using T- tree index methods and log directories to carried out the recovery by the mobile site and received the hand-over remove the overhead of the recovery time. This new method is called T-tree Index Log Directory: TILD, and the recovery is applied by it. And the efficiency was proved by test of the proposed recovery systems. 최근 스마트폰 및 모바일 기기의 대중화로 인하여 실시간 트랜잭션 모델에 관한 연구가 활발히 진행되고 있다. 이러한 모바일 메인메모리 데이터베이스시스템에서는 셀과 셀 사이 서비스 공간 이동시 통화가 단절되는 현상이 나타날 경우 데이터의 손실이 발생할 수 있으므로 데이터베이스의 안정성을 위하여 회복기법은 매우 중요하다. 모바일 메인메모리 회복기법에서는 프로그램의 실행 상태를 기록하기 위하여 발생하는 입출력으로 인하여 시스템의 성능이 저하될 수 있다. 그로 인하여 모바일 메인메모리 데이터베이스시스템에서는 로깅과 체크포인트로 인하여 발생되는 입출력을 줄일 수 있는 효율적인 회복기법에 대한 연구가 요구된다. 본 연구에서는 T-트리 인덱스 기법과 로그 디렉터리를 이용하여 통화가 단절되는 현상이 발생한 모바일 사이트별로 회복을 수행함으로써 회복시간의 오버헤드를 제거하였다. 이 제안된 기법을 T-트리 인덱스 로그 디렉터리(T-tree Index Log Directory: TILD) 기법이라 하며, 이 기법을 이용하여 성능 평가를 수행하여 효율성을 입증하였다.
21세기 초 생태마르크스주의 논쟁의 쟁점들: 물질대사 균열 비판과 반비판
이광근 비판사회학회 2022 경제와 사회 Vol.- No.133
21세기 초 물질대사 균열은 생태주의 진영의 스타 개념이었다. 그러나 2010년부터 개념화에 대한 비판이 개진되었고, 무어의 세계생태 분석은 이 비판과 근대적 이분법에 대한 라투르의 비판을 종합해, 물질대사 균열 이론을 데카르트주의적인 자연/사회 이분법이 전제된 녹색 산술로 비판해 왔다. 이 비판에 직면해 포스터 진영의 생태마르크스주의자들은 무어의 가치관계 이론과 저렴한 자연 전략, 라투르와의 이론적 공모, 자본주의 저항 주체의 문제에 대해 반비판을 전개했다. 이는 무어의 재반박으로 이어졌고, 프레이저는 이 논쟁의 유용한 통찰들에 기반해 새로운 비판이론을 선보인다. 이 논쟁의 의의는 세 가지다. 첫째, 이 논쟁에는 마르크스주의의 과거 두 논쟁 ― 자본주의 이행 논쟁과 자본주의의 2차 모순 ― 의 쟁점이 잠복하고 있다. 둘째, 이 논쟁은 마르크스주의와 하이브리디즘 간 대화의 장을 열었다. 셋째, 생태위기 시대의 자본주의에 대한 새로운 비판이론들에게 새로운 참조점을 제공했다. For the first and second decades of the 21st century, the metabolic rift has been a conceptual star in the field of ecology. But since 2010, it has been put under a critical scrutiny. Critically incorporating the hybridist criticism to the world-historical analysis, Jason W. Moore has criticized it as a green arithmetic based on the Cartesian dualism of Nature/Society. Confronted with this criticism, Saito Kohei, Andreas Malm, John Bellamy Foster, and Paul Burkett engage in a series of anti-criticisms. In this debate, major controversial issues include the theory of value relation, Cheap Nature strategy, Latour’s flat ontology, and the undertheorization of resistance subject under capitalism. Despite anticriticisms, Moore has continued to proceed and expand his world-ecology analysis, Moreover, Nancy Fraser, standing on the shoulder of this debate, elaborates a new critical theory of capitalism. This debate is significant especially in three points: First, the issues in two previous debates on the transition to capitalism and on the second contradiction of capitalism are latent in this debate; Second, it opens a new field of conversation/engagement between Marxism and hybridism; And third, it would provide new critical theories of capitalism with a new reference.
이광근,이하나,이승주,한응수 한국산업식품공학회 2005 산업 식품공학 Vol.9 No.1
The salting process in kimchi is the most important procedure in terms of its quality and productivity. For reducing salting time of baechu (Chinese cabbage), the vacuum impregnation (VI) was applied in this study. The influence of process variables such as initial vacuum pressure, vacuum pressure period (t1), and relaxation time from vacuum to atmospheric pressure (t2) on salting process of baechu. was investigated. Sample volume fraction impregnated by the solution (X), relative sample volume deformation( γ) and effective porosity (εe) were measured according to the change in the process variables. X, γ and εe were not significantly changed with the process variables, but significantly influenced by sodium chloride (NaCl) concentration which occur and osmosis. There might be both inward and outward flows corresponding to impregnation and osmosis, respectively. It was inferred that the effect of the process variables could be offset by that of osmosis due to the difference in NaCl concentration.
이광근 한국산업식품공학회 2003 산업 식품공학 Vol.7 No.2
Since the Swedish National Administration (NFA) and researchers from Stockhorm University announced that acrylamide, a toxic potentially cancer-causing chemical, was formed in many types of food cooked at high temperature in April 2002, there have been a lot of international meetings and researches dealing with formation mechanism and toxicity of arylamide. It is hard to surely figure out the mechanism and toxicity of acrylamide at present time. This article deals with the detection levels in various foods, toxicity and formation mechanism o acrylamide. Acrylamide formation during food processing and cooking was confirmed by researchers of UK, Sweden, Switzerland and United States. They insisted that acrylamide in heated foods was formed by Maillard reaction between asparagine and glucose during cooking and food processing. It is well-know that heating time and temperature are significant factors for acrylamide formation in food processing. Regarding to the toxicity of acrylamide we need more experimental data to conclude its toxicity for humans. So far there is no credible evidence that acrylamide in foods poses a human cancer risk. Though acrylamide increased the incidnece of tumors in the high-dose rodent test, it is difficult to relate its toxicity to the human carcinogens. In the future, more accurate analysis of acrylamide in various foods, the human toxicity, and reduction study based on the formation mechanism should be investigated to prevent consumer's confusion.