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A Transport Theoretic Approach for Computational Task Migration in Multi-Access Edge Computing
Sarder Fakhrul Abedin(사르더 파쿠룰 아베딘),Md. Shirajum Munir(엠디 시라줌 무니르),SeokWon Kang(강석원),Choong Seon Hong(홍충선) 한국정보과학회 2019 정보과학회논문지 Vol.46 No.10
본 논문에서는 MEC(Multi-Access Edge Computing) 네트워크에서의 컴퓨터 작업 마이그레이션의 문제를 다루는데, MEC 네트워크의 작업 마이그레이션 비용을 포함한 연산 비용을 최소화하는 것을 목표로 한다. 첫째로 많이 사용되는 MEC 서버에서 적게 사용되는 MEC 서버로 작업 마이그레이션에 해당하는 Hitchcock-Koopmans 전송 문제를 공식화한다. 두번째는 최적의 작업 마이그레이션이 이루어지는 보겔의 추정 알고리즘(Vogel"s Approximation Algorithm)을 이용해 전송 문제를 해결한다. 마지막으로, 시뮬레이션에서 제안된 접근 방식이 MEC 네트워크의 작업 마이그레이션 비용, 평균 응답 시간 및 평균대기열 지연 측면에서 기준 접근방식을 개선한다는 것을 보인다. In the present work, the problem of computational task migration in the Multi-Access Edge Computing (MEC) Network has been addressed and the goal is to minimize the computational cost including the task migration cost of the MEC network. Apparently, at first, we have formulated a Hitchcock-Koopmans transportation problem, which corresponds to the task migration from the over-utilized MEC servers to the under-utilized MEC server. Second, we have solved the transportation problem using the Vogel’s Approximation Algorithm (VAM), where the optimal task migration was achieved. Finally, in the simulation, we have demonstrated that the proposed approach significantly outperforms the baseline approach in terms of the task migration cost, average response time, and average queuing delay in the MEC network.
Sarder Nasir Uddin 경희대학교 융합한의과학연구소 2008 Oriental Pharmacy and Experimental Medicine Vol.8 No.4
Methanol and aqueous extract of leaves of Trema orientalis Linn. were subjected to the potential antioxidant and antibacterial activities. The pharmacological interest of this plant coupled with traditional use (antidiarrhoeal, antiseptic, analgesic etc) prompted to test for antioxidant and antibacterial activities. The antioxidant potential of the methanolic extract was determined on the basis of their scavenging activity of the stable 1,1-diphenyl-2-picryl hydrazyl free radical. IC50 of the methanol extract of T. orientalis was 110.25 μg/ml which indicated the strong antioxidant activity of the plant. However the aqueous extract showed mild antioxidant activity. In case of antibacterial activities test, the extract was subjected for its effectiveness against both Grampositive and Gram-negative bacteria in agar diffusion method. The zones of inhibition produced by the crude methanol and aqueous extract against few sensitive strains were measured and compared with those of standard antibiotic Gentamycin. It is evident that both extracts are active against the bacteria at low concentrations. The obtained results provide a support for the use of this plant in traditional medicine and suggest its further advance investigation. Methanol and aqueous extract of leaves of Trema orientalis Linn. were subjected to the potential antioxidant and antibacterial activities. The pharmacological interest of this plant coupled with traditional use (antidiarrhoeal, antiseptic, analgesic etc) prompted to test for antioxidant and antibacterial activities. The antioxidant potential of the methanolic extract was determined on the basis of their scavenging activity of the stable 1,1-diphenyl-2-picryl hydrazyl free radical. IC50 of the methanol extract of T. orientalis was 110.25 μg/ml which indicated the strong antioxidant activity of the plant. However the aqueous extract showed mild antioxidant activity. In case of antibacterial activities test, the extract was subjected for its effectiveness against both Grampositive and Gram-negative bacteria in agar diffusion method. The zones of inhibition produced by the crude methanol and aqueous extract against few sensitive strains were measured and compared with those of standard antibiotic Gentamycin. It is evident that both extracts are active against the bacteria at low concentrations. The obtained results provide a support for the use of this plant in traditional medicine and suggest its further advance investigation.