• Title/Summary/Keyword: Nature-based solution

Search Result 218, Processing Time 0.034 seconds

Implications in Case Study on the Electronic Bills of Lading (전자선화증권의 기능에 대한 사례분석과 시사점)

  • Choi, Seok-Beom;Kim, Tae-Hwan
    • International Commerce and Information Review
    • /
    • v.7 no.1
    • /
    • pp.171-194
    • /
    • 2005
  • The CMI Rules for Electronic Bills of Lading were drafted by the Comite Maritime International(CMI) and related specifically to EDI transfers of negotiable bills of lading. The CMI Rules are contractual in nature and the application of the CMI Rules is strictly voluntary. The method adopted in the CMI Rules to enable negotiation of the rights to cargo in a controlled method is based on the introduction of the ‘Private Key’. The Bolero service will be governed by a multilateral contract called the Bolero Rule Book which specifies the rights and responsibilities of Bolero and its users. The Title Registry and Bolero Bill of Lading provide a fully functional equivalent to the paper bill of lading. The Bolero Bill of Lading can be created, transferred, amended, and surrendered by way of designating to order party, blank endorsement, refusal by the transferee etc. In Japan, through TEDI Project, the RSP Model is introduced as e-trade solution like Bolero's Solution. The RSP Model Solution will be furnished through TC(Trade Chain) Server and RSP(Repository Service Provider) Server. The purpose of this paper is to analyze comparatively the CMI Rules and Bolero Bill of Lading and RSP Model of TEDI and to find the implications in this case study for quick introduction of electronic Bill of Lading.

  • PDF

Modeling Dynamics of Nonconservative Pollutants in Streams with Pools and Riffles

  • Seo, Il-Won;Yu, Dae-Young
    • Proceedings of the Korea Water Resources Association Conference
    • /
    • 1993.07a
    • /
    • pp.175-182
    • /
    • 1993
  • The complex nature of low flow transport and tranformation of nonconservative pollutants in natural streams with pools and riffles has been investigated using a numerical solution of a proposed mathematical model that is based on a set of mass balance equations describing hydrodynamic processes (advection, dispersion, and mass exchange mechanicms in streams and in storage zones) and chemical processes (reaction or decay). In this study, a mathematical model (named "Storage-Transformation Model") has been developed to predict adequately the non-Fickian nature of mixing and transformation mechanisms for decaying substances in natural streams under low flow conditions. Comparisons between the concentration-time curves predicted usingthe proposed model and the measured stream data shows that the Storage-Transformation Model yields better agreements in the goneral shape, peak concentration and time to peak than the 1-D dispersion model. The result of this study also demonstrates the differences between transport in pool-and-riffle streams versus transport in more uniform channels. The proposed model shows significant improvement over the conventional 1-D disperision model in predicting natural mixing and stroage processes in streams through pools and riffles.

  • PDF

Self-healing Anticorrosion Coatings for Gas Pipelines and Storage Tanks

  • Luckachan, G.E.;Mittal, V.
    • Corrosion Science and Technology
    • /
    • v.15 no.5
    • /
    • pp.209-216
    • /
    • 2016
  • In the present study, chitosan based self-healing anticorrosion coatings were prepared by layer by layer (lbl) addition of chitosan (Ch) and polyvinyl butyral (PVB) on mild carbon steel substrate. Chitosan coatings exhibited enhanced coating stability and corrosion resistance in aggressive environments by the application of a PVB top layer. Chitosan layer in the lbl coatings have been modified by using glutaraldehyde (Glu) and silica ($SiO_2$). Performance of different coatings was tested using electrochemical impedance spectroscopy and immersion test. The best anticorrosion performance was observed in case of 10 % Ch_$SiO_2$_PVB coatings, which withstand immersion test over 25 days in 0.5 M salt solution without visible corrosion. 10 % Ch_$SiO_2$ coatings without the PVB top layer didn't last more than 3days. Application of PVB top layer sealed the defects in the chitosan pre-layer and improved its hydrophobic nature as well. Raman spectra and SEM of steel surfaces after corrosion study and removal of PVB_Ch/Glu_PVB coatings showed a passive layer of iron oxide, attributing to the self-healing nature of these coatings. Conducting particle like graphene reinforcement of chitosan in the lbl coatings enhanced corrosion resistance of chitosan coatings.

Plasma and VUV Pretreatments of Polymer Surfaces for Adhesion Promotion of Electroless Ni or Cu Films

  • Romand, M.;Charbonnier, M.;Goepfert, Y.
    • Journal of Adhesion and Interface
    • /
    • v.4 no.2
    • /
    • pp.10-20
    • /
    • 2003
  • This paper is relative to the electroless deposition of nickel or copper films on polyimide and polytetrafluoroethylene substrates. First, it is presented an original approach of the electroless process which consists in grafting nitrogenated functionalities on the polymer surfaces via plasma or VUV-assisted treatments operating in a nitrogen-based atmosphere ($NH_3$, $N_2$), and then in catalysing the grafted surfaces in an aqueous tin-free, Pd(+2)-based solution. Adhesion of the Pd(+2) catalytic species on polymer surfaces is explained by the formation of strong covalent bonds between these species and the grafted nitrogenated groups. Second, it is show how a fragmentation test performed in conjunction with electrical measurements can be used to characterize the practical adhesion of the electroless coatings deposited on flexible polymer substrates, and to evidence the influence of some experimental parameters (plasma treatment time and nature of the gas phase).

  • PDF

Agent-based Collaborative Simulation Architecture for Distributed Manufacturing Systems (분산 생산 시스템을 위한 에이전트 기반의 협업 시뮬레이션 체계)

  • Cha Yeong Pil;Jeong Mu Yeong
    • Proceedings of the Korean Operations and Management Science Society Conference
    • /
    • 2003.05a
    • /
    • pp.808-813
    • /
    • 2003
  • Maintaining agility and responsiveness m designing and manufacturing activities are the key issues for manufacturing companies to cope with global competition. Distributed design and control systems are regarded as an efficient solution for agility and responsiveness. However, distributed nature of a manufacturing system complicates production activities such as design, simulation, scheduling, and execution control. Especially, existing simulation systems have limited external integration capabilities, which make it difficult to implement complex control mechanisms for the distributed manufacturing systems. Moreover, integration and coupling of heterogeneous components and models are commonly required for the simulation of complex distributed systems. In this paper, a collaborative and adaptive simulation architecture is proposed as an open framework for simulation and analysis of the distributed manufacturing enterprises. By incorporating agents with their distributed characteristics of autonomy, intelligence, and goal-driven behavior, the proposed agent-based simulation architecture can be easily adapted to support the agile and distributed manufacturing systems. The architecture supports the coordination and cooperation relations, and provides a communication middleware among the participants in simulation.

  • PDF

Perspectives on Modern Drama

  • Yang, Gi-Chan
    • Lingua Humanitatis
    • /
    • v.2 no.1
    • /
    • pp.239-258
    • /
    • 2002
  • The paper develops the arguments as to how one should perceive modem theater and how one should categories it, not to mention how one may identify the traits of modern theater. The Contemporary Theater has changed in a way that it is no longer possible to define the genre relying on conventional definitions that we associated with it in the past. The paper in this regard proposes a perspective which by addressing the evolutions that one has seen in the theories of reception and other relevant literary fields may define the very nature of the theater as we Cow it today. The paper is largely based on the aesthetics of reception and the objectivity theory which is based on the decontextualisation, recontextualisation and contextextualisation method that is being more and more commonly used in the field of literary academics of today. The relevancy of this paper rests with the hypothesis that it is by and through using various theories of reception that it is the only true solution as to defining and identifying the characteristics of modem theater.

  • PDF

Multiscale Adaptive Wavelet-Galerkin Method for Membrane Eigenvalue Analysis (박막 고유치 해석을 위한 멀티스케일 적응 웨이블렛-갤러킨 기법)

  • Yi, Yong-Sub;Kim, Yoon-Young
    • Proceedings of the KSME Conference
    • /
    • 2003.11a
    • /
    • pp.1291-1296
    • /
    • 2003
  • The objective of the present research is to develop a wavelet-based multiscale adaptive Galerkin method for membrane eigenvalue analysis. Since approximate eigensolutions at a certain resolution level can be good guesses, which play an important role in typical iterative solvers, at the next resolution level, the multiresolution iterative solution approach by wavelets can improve the solutionconvergence rate substantially. The intrinsic difference checking nature of wavelets can be also utilized effectively to develop an adaptive strategy. The present wavelet-based approach will be implemented for the simplest vector iteration method, but some important aspects, such as convergence speedup, and the reduction in the number of nodes can be clearly demonstrated.

  • PDF

Lyapunov-based Fuzzy Queue Scheduling for Internet Routers

  • Cho, Hyun-Cheol;Fadali, M. Sami;Lee, Jin-Woo;Lee, Young-Jin;Lee, Kwon-Soon
    • International Journal of Control, Automation, and Systems
    • /
    • v.5 no.3
    • /
    • pp.317-323
    • /
    • 2007
  • Quality of Service (QoS) in the Internet depends on queuing and sophisticated scheduling in routers. In this paper, we address the issue of managing traffic flows with different priorities. In our reference model, incoming packets are first classified based on their priority, placed into different queues with different capacities, and then multiplexed onto one router link. The fuzzy nature of the information on Internet traffic makes this problem particularly suited to fuzzy methodologies. We propose a new solution that employs a fuzzy inference system to dynamically and efficiently schedule these priority queues. The fuzzy rules are derived to minimize the selected Lyapunov function. Simulation experiments show that the proposed fuzzy scheduling algorithm outperforms the popular Weighted Round Robin (WRR) queue scheduling mechanism.

Performance Analysis of DNN inference using OpenCV Built in CPU and GPU Functions (OpenCV 내장 CPU 및 GPU 함수를 이용한 DNN 추론 시간 복잡도 분석)

  • Park, Chun-Su
    • Journal of the Semiconductor & Display Technology
    • /
    • v.21 no.1
    • /
    • pp.75-78
    • /
    • 2022
  • Deep Neural Networks (DNN) has become an essential data processing architecture for the implementation of multiple computer vision tasks. Recently, DNN-based algorithms achieve much higher recognition accuracy than traditional algorithms based on shallow learning. However, training and inference DNNs require huge computational capabilities than daily usage purposes of computers. Moreover, with increased size and depth of DNNs, CPUs may be unsatisfactory since they use serial processing by default. GPUs are the solution that come up with greater speed compared to CPUs because of their Parallel Processing/Computation nature. In this paper, we analyze the inference time complexity of DNNs using well-known computer vision library, OpenCV. We measure and analyze inference time complexity for three cases, CPU, GPU-Float32, and GPU-Float16.

A Synthesis of Mullite and Cordierite Ceramics by Solution-Polymerzation Route Based on PVA (PVA를 이용한 Solution-Polymerzation 합성법에 의한 Mullite, Cordierite 세라믹스의 합성)

  • 이용석;이병하
    • Journal of the Korean Ceramic Society
    • /
    • v.41 no.2
    • /
    • pp.151-157
    • /
    • 2004
  • Because of the excellent thermal and chemical properties of mullite and cordierite as the stable oxide ceramic materials, they were widely used from engineering materials to electronic materials. Notwithstanding of their high demands, mullite was synthesised because it is not existed in nature. It is also difficult to produce cordierite of fine powder with high purity due to the narrow range of synthetic temperature. Mullite was synthesised by solid state reaction. However, synthesized mullite has been inhomogeneous. Because of the facts, various synthetic methods have been studied so far including sol-gel method. The purpose of this study is to synthesis mullite and cordierite of fine powder with high purity at the lower temperature by solution-polymerization route using PVA as a polymer carrier, which is an economical method by using low cost materials. As a result, mullite and cordierite were produced with mono crystal phase at 1200$^{\circ}C$ and 1250$^{\circ}C$, respectively, and their surface area over 20 ㎡/g.