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Front Matter |
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Abstract
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Framework of Integrated System for the Innovation of Mold Manufacturing Through Process Integration |
Bo Hyun Kim,Sung Bum Park,Gyu Bong Lee,So Young Chung |
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Abstract
The mold industry can be characterized as small businesses which hold only less than 10 to 20 people in most countries. A medium-size mold company has cooperated with its small suppliers to overcome this situation and to finish mold manufacturing processes from order to delivery. However, the collaboration in the mold value chain has not been preformed well because of the lack of the management transparency and manufacturing history, off-line communication of manufacturing information, etc. This study proposes a framework of the integrated system which can realize the concept of a mold value chain consisted of a medium mold company and its suppliers on the Internet. First of all, the current manufacturing process performed in the extended enterprise is analyzed using BPMN (business process modeling notation). The user requirements are collected by the interview with shop floor mangers and workers, and the major system functions are extracted from these requirements using KJ method. This study proposes the PPR (product/process/ resource)-based architecture of the master data which plays a key role in the integrated database and the system framework consisted of six sub-systems. Fina
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A Study on Automated Design System for a Blow Mould |
Yong Ju Cho,Kwang Yeol Ryu,Seok Woo Lee |
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Abstract
Designing a blow mould is a very complicated and knowledge-intensive process. This paper describes a feature-based, parametric-based, and knowledge-based design system for drawing blow moulds that requires only a minimum set of parameters to be set before it completes the design of the main parts of an injection, blow, and eject mould. This blow mould design system, implemented on top of the Powershape CAD, consists of a machine type and cavity setting module, an injection designer, a blow designer, an eject designer, mould design creation module, moulding database, and machine database. Through these modules, the mould designers are able to create a 3D blow mould design from customer requirements. This system is capable of reducing the lead-time of blow mould design as it integrates the three stages (injection, blow, eject) of the blow mould design process and can greatly improve the product quality through a standardization of the design process.
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Development of an Evaluation System of the Informatization Level for the Mould Companies in Korea |
Yong Ju Cho,Sung Hee Lee |
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Abstract
Currently, the domestic mould industry is experiencing tremendous difficulty in promoting informatization due to a lack of confidence in the effect of informatization and the related shortage of manpower and funding. For instance, they have difficulty in selecting the type of information system they should introduce in the future. In this study, we develop a model for evaluating informatization level of the mould companies and the evaluation framework from the information viewpoint and derive three evaluation fields and their respective factors as well as a questionnaire for each factor to conduct a survey of domestic mould companies. After the reliability and validity of the survey were analyzed, we finalize the evaluation framework.
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Framework of a Collaboration-Based Engineering Service System for Mould Industry |
Chang Ho Lee,Yong Ju Cho |
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Abstract
Currently, the environment of manufacturing industry is becoming a distribution, specialization and collaboration. Particularly, the mould industry, the basis of the Korea manufacturing industry, is also experiencing those changes and the requirements of customers for mould companies are becoming increasingly diverse. To cope this, mould enterprise is endeavoring for satisfaction of the requirements in order processing, mould & part design, mould machining, and pre-injection which are unique jobs of mould enterprise. But, a lot of inferiority is occurring by a poor production environment. In order to troubleshoot this inferiority, the engineering services such as CAE analysis and inspection are absolutely required. The function of engineering service provides major businesses within mould company with new needs and rules. In this paper, the framework of e-engineering service system is implemented with the e-business and the e-commerce form. Also, functions in framework of e-engineering service system are implemented by using agent modules.
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Meta-modelling Syntax and Semantics of Structural Concepts for Open Networked Enterprises |
Mohamed Bouhdadi,Youssef Balouki,El maati Chabbar |
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Abstract
The Reference Model for Open Distributed Processing (RM-ODP) defines a framework within which support of distribution, interoperability and portability can be integrated. However other ODP standards have to be defined. We treat in this paper the need of formal notation for structural concepts in the enterprise language. Indeed, the ODP viewpoint languages are abstract in the sense that they define what concepts should be supported not how these concepts should be represented. One approach to define formal semantics of a language is denotational elaborating the instance denoted by a sentence of the language in a particular context. Using the denotational semantics in the context of UML/OCL meta-modelling approach and the denotational semantics we define in this paper syntax and semantics for a fragment of ODP structural concepts defined in the RM-ODP foundations part and in the enterprise language. These specification concepts are suitable for describing and constraining ODP enterprise viewpoint specifications.
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Component Specification for Parallel Coupling Infrastructure |
J. Walter Larson,Boyana Norris |
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Abstract
. comprise multiple mutually interacting subsystems, and are an increasingly common computational science application, most notably as multiscale and multiphysics models. Parallel computing, and in particular message-passing programming have spurred the development of these models, but also present a . (PCP) in the form of intermodel data dependencies. The PCP complicates model coupling through requirements for the description, transfer, and transformation of the distributed data that models in a parallel coupled system exchange. Component-based software engineering has been proposed as one means of conquering software complexity in scientific applications, and given the compound nature of coupled models, it is a natural approach to addressing the parallel coupling problem. We define a software component specification for solving the parallel coupling problem. This design draws from the already successful Common Component Architecture (CCA). We abstract the parallel coupling problem’s elements and map them onto a set of CCA components, defining a parallel coupling infrastructure toolkit. We discuss a reference implementation based on the Model Coupling Toolkit. We demonstrate how t
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Real-Time Navigation for a Mobile Robot Based on the Autonomous Behavior Agent |
Lu Xu,Liguo Zhang,Yangzhou Chen |
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Abstract
Autonomous behavior agent includes the robot most behaviors which are designed using hierarchical control method to guarantee their real time performance for real time navigation in response to different situation perceived. The process of robot real time navigation based on the autonomous behavior agent mainly includes three behaviors. The sensing behavior translates the configuration space that the robot and obstacles exist in into 2D Cartesian Grid by Quadtree method. The path planning behavior designs the sub-goals given the global map, start and goal points by improved D* Lite Algorithm. And the obstacle avoidance behaivor replans the path between two adjacent sub-goals when the environment changes. It is able to replan faster than planning from scratch since it modifies its previous search results locally and enables robots adapt to the dynamic environment. The simulation results that are reported show that the mobile robot navigation method is efficient and feasible.
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Concurrent Subsystem-Component Development Model (CSCDM) for Developing Adaptive E-Commerce Systems |
Liangtie Dai,Wanwu Guo |
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Abstract
The waterfall and incremental models are widely used for guiding E-commerce system development. In some cases where clients demand a quick solution to maximise their business benefit, these models are not fully fit in directing such projects. This is because the client’s prioritisation of system requirements is determined by immediate business benefit whereas the developer’s is based on the long-term system usability and reliability. The concurrent subsystem-component development model (CSCDM) proposed in this paper is an alternative approach for guiding system development, especially for client-driven business systems. Its waterfall-based framework is easy to follow and understand by the developers. Its component-based stream only iterates over the Implementation, Testing, and Deployment stages. Since the design for the overall system and prototypes is done at the same stage, all the prototypes can be fully or partly absorbed into the corresponding system groups, and/or modified to fit into the system design. The local iterations realise the business needs separately using prototyping without interference with the progression of the overall system development, which ensures the qu
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A Quantitative Approach for Ranking Change Risk of Component-Based Software |
Chengying Mao |
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Abstract
The rapid evolution of component-based software brings great challenges to its maintenance in the later phase, so it is quite necessary to measure the risk its changes bring to the whole system. Through redefining the component dependency graph, the paper presents a two-step approach to assess the change risk of component-based software (CBS), which results from the partial changes of components in system. After obtaining the change risk of single component, we transform the component dependency graph to a component dependency tree, and then calculate the change risk of the whole CBS according to paths in the tree. In addition, a case study is made to illustrate how the technique works.
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Relating Software Architecture Views by Using MDA |
Rogelio Limon Cordero,Isidro Ramos Salavert |
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Abstract
Software architecture views separate the concerns that are presented in phases previous to the detailed design phases of a software system. Each view represents a different structure of a system for its analysis and documentation. Although each view can be designed separately, they are linked because they are part of the same system. These links must be explicitly shaped and maintained in order to achieve synergy in their design and also to preserve consistency among the views when they change for evolution or maintenance reasons. This work proposes the use of the Model-Driven Architecture (MDA) approach to establish the links among the architectural views through a relation of models. This work shows how relations among software architectural views can be established by means of strategies used in MDA in a systematic way.
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Update Propagation Technique for Data Grid |
Mohammed Radi,Ali Mamat,M. Mat Deris,Hamidah Ibrahim,Subramaniam Shamala |
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Abstract
Data replication is a well known technique used to reduce accesses latency, improve availability, and performance in a distributed computing environment. An asynchronous replication is a commonly agreed solution for the consistency of replicas problem. Update propagation using a classical propagation schema called the radial method suffers from high overhead of the master replica while line method suffers from high delay time. This paper presents a new asynchronous replication protocol called Update Propagation Grid (UPG) which especially for a wide area distributed Data Grid. Updates reach other replicas using a propagation technique based on nodes organized into a logical structure network that enables the technique to scale well for thousands of replicas. Restructuring operation is provided to build and reconfigure the UPG dynamically. An analytical model is developed; communication cost, average load balance, and average delay time have been analyzed. The technique achieves load balancing and minimizes the delay for file replication in Data Grid.
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A Spatiotemporal Database Prototype for Managing Volumetric Surface Movement Data in Virtual GIS |
Mohd Shafry Mohd Rahim,Abdul Rashid Mohamed Shariff,Shattri Mansor,Ahmad Rodzi Mahmud,Daut Daman |
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Abstract
Virtual GIS have the capability to present geographic features in three-dimension. This will contribute to increasing user understanding of phenomena that occurred in certain areas. Virtual GIS need to include temporal element in the system for managing dynamic phenomena to simulate real process. Spatiotemporal database system can be used to manage temporal data or spatial data that involve changes. In this paper, we present the database system of a spatiotemporal database prototype for managing volumetric surface movement; Volumetric Surface Movement Spatiotemporal Data Model that has the ability to store changes of the surface data of a three dimensional object. Formalization of the surface movement phenomena on the volumetric object were defined. This model has been implemented using relational database model which store only the changing points in order to ensure an efficient data management. We have developed a visualization tool with the database system to visualize movement on the surface. The prototype system of this model has been tested and found to be efficient.
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Query Distributed Ontology over Grid Environment |
Ngot Phu Bui,SeungGwan Lee,TaeChoong Chung |
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Abstract
On the Semantic Web, query answering will require data coming from many different ontologies, and information processing is not possible without having a framework that discovers their overlaps, evolved contents, and availabilities. Semantic searching on predefined number of ontologies may give us incomplete, unclear, and even meaningless result. Hence the development of a system to exploit the relationship of semantic sharing data from various sources for searching process is crucial to the success of the Semantic Web. We propose Distributed Ontology Framework on Grid environment (DOFG) and a query analyzing method in distributed ontology environment. DOFG employs Grid computing technique to build an ontology virtual organization for managing meta-data and utilizing the computing power of many sites when processing query. Our implementation on some real-world domains shows the fitness of DOFG on large sharing semantic data mediums and the high feasibility of this framework to be a generic architecture for numerous semantic grid applications.
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CSP Transactors for Asynchronous Transaction Level Modeling and IP Reuse |
Lilian Janin,Doug Edwards |
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Abstract
In synchronous circuit design, new levels of abstraction above RTL allow the designer to model, simulate, debug and explore various architectures more efficiently than before. These are known as transaction level modeling. The translation between signals at different levels of abstraction is performed by pieces of code called transactors, mainly for the purpose of simulation. This paper identifies a set of asynchronous abstractions suitable for asynchronous transaction level modeling. Based on these models, we show that asynchronous CSP-based transactors can bring many more benefits than their synchronous counterparts, while being simpler to describe. We show how they can be used to automatically generate complex SystemC templates and hardware-software links, and automatically build network-on-chip interfaces facilitating IP reuse in embedded systems. Tools were developed after the techniques described in this paper. They are used in a case study to describe an asynchronous IP from transaction levels to RTL, demonstrating the automatic generation of various complex parts of the design and the minimum amount of specifications required from the designer.
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A Robust Real-Time Message Scheduling Scheme Capable of Handling Channel Errors in Wireless Local Ar |
Junghoon Lee,Mikyung Kang,Gyung-Leen Park,In-Hye Shin,Hanil Kim,Sang-Wook Kim |
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Abstract
This paper proposes and analyzes the performance of a robust real-time message scheduling scheme capable of handling channel errors by exploiting an auxiliary schedule on the IEEE 802.11 WLAN. While the primary schedule is derived from the legacy EDF (Earliest Deadline First) scheme, the auxiliary schedule is generated based on the slack and arrival times of each message stream. During runtime, with the support of a channel probing functionality, the access point dynamically switches the two polling schedules according to the channel status, giving a temporaily unreachable stream more chances to meet its time constraints. Simulation results show that the proposed scheme improves the success ratio by up to 8.56 % and performs well even if the length of error duration gets larger, demonstrating that it is also robust to the bursty errors.
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Design and Implementation of a Tour Planning System for Telematics Users |
Junghoon Lee,Euiyoung Kang,Gyung-Leen Park |
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Abstract
Aiming at providing an efficient tour schedule to tourists driving with a telematics device, this paper designs and implements an intelligent tour planning system based on the personalized tour recommender that may generate lots of destinations. To overcome the problem of long response time due to the computation of .(2. ·.!) complexity solver, we used initial set reduction, distributed computing via MPI-based Linux cluster, and finally Lin-Kernighan heuristic. An user interface was also implemented on a portable device using the utility of embedded operating system. Performance measurement results exhibit that the tour schedule can not only be offered to the user within 5 seconds when the number of TPOIs is less than 22, but also find a schedule whose satisfaction degree is very close to the optimal value.
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Ionospheric F-Layer Critical Frequency Estimation from Digital Ionogram Analysis |
Nipon Theera-Umpon |
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Abstract
The ionosphere plays an important role in radio applications, e.g., satellite, cellular phone, global positioning system (GPS), etc. An ionogram is one of the information sources of the ionosphere. Unfortunately, ionograms are generally corrupted by noise and artifacts. These imperfections cause difficulties in the efforts to create automatic systems. In this paper, we propose a size-contrast filtering-based ionogram enhancement. The size-contrast filter can suppress the objects that are too small or too large. The good enhancement performance is achieved by applying the proposed algorithm to the ionograms collected by the ionosonde at Chiang Mai University, Thailand. We also propose a critical frequency estimation algorithm for the ordinary-mode and extraordinary-mode wave components. The proposed estimation algorithm is based on the region of interest selection, and weak segment elimination and trace determination. We achieve very good estimation performance by evaluating our proposed algorithms on ionograms from 2 sets of 12 consecutive sweeps from the nighttime and daytime.
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Study of Digital License Search for Intellectual Property Rights of S/W Source Code |
Byungrae Cha,Kyungjun Kim,Dongseob Lee |
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Abstract
The IPR(Intellectual Property Rights) system and technology for the extended software source code from digital contents are very significant to enhance international competitiveness. A problem happens if the original software source code is made public at dispute on its ownership. This study has suggested the Business model and comparison of S/W source code vs. Digital License to protect the copyright infringement and technique leakage caused by its opening. In this paper, we make a study of the digital licence prototype for discriminate the original source code. Reserved words of software source code by parsing express to XML file that have hierarchical structure. Then, we can express architecture of software source code by tree structure form instead of complex source code. And we make a study of the indexing and searching to search digital license.
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Creating Numerically Efficient FDTD Simulations Using Generic C++ Programming |
I. Valuev,A. Deinega,A. Knizhnik,B. Potapkin |
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Abstract
In the present work we propose a strategy for developing reusable multi-model simulation library for solving Finite-Difference Time-Domain (FDTD) problem for Maxwell’s equations. The described EMTL (Electromagnetic Template Library) architecture is based on the selection of a small number of primitive low-level physical and numerical concepts which are used as parameters and building blocks for higher-level algorithms and structures. In the present work we demonstrate that a large set of FDTD techniques may be formulated using the same primitives. The basic concept for this representation is a discretized field contour entering the integral form of Maxwell’s equations. We also describe the proposed architecture in terms of FDTD C++ template class library and discuss the performance and the usage of this library for various FDTD-based simulations.
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发表于 2025-3-21 17:02:19
