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There are thermal power plants constructed in South Korea in 1990s. Usually it is estimated 25-30 years as economic life. On contrary, because the control systems for thermal power plants consist of high-technology electronic components, the economic life is estimated 10-30 years. The large variation is based on operation environment. According bath-tub curve, the faults increases during the beginning...
Today's Internet is facing many problems which did not take into account in its initial design, such as routing scalability, mobility and security. No matter evolutional or revolutionary solutions that are proposed in recent years, a recognized promising direction is to separate customer network from core network and separate identification from location. In this paper, we sketch out an architecture...
Self-Adaptation has gained wide attention in SOA (Service Oriented Architecture). Composite services adjust dynamically to the change of environment during execution through adaptation. Most existing performance analyzing methods on composite service neglect the distinguished feature of environment, which impedes their application in self-adaptive composite services. This paper proposes a stochastic...
Collision avoidance system for ships is an autonomous system that examines risk of collision between ships based on the data from navigational equipment and performs appropriate avoidance control to prevent the collision. Development of the system is relatively unexplored area compared to UGV and UAV. In this paper, based on analysis of techniques to facilitate autonomy of the UGV and UAV, application...
As ontology is subjective and varies in different domains, the amount of ontologies turns out to be huge but with poor compatibility. Mainstream method for ontology integration is mostly achieved by establishing mappings between ontologies. In this essay, the author put forward another way of ontology merging. After statistic machine learning on concept relations, the frequency of different ontologies...
The remote operation in nuclear facilities is essential field since human access is restricted due to the effects of high radiation. Using a haptic device in the roll of a master manipulator enhances the throughput and the reliability of the simulation because of the kinetic sense of reality. This paper describes a 3D graphic based simulator system to simulate the nuclear facilities. The human interface...
Data transmission reliability is an important issue in the design of wireless sensor networks. This paper proposes a new network coding strategy combing with ARQ to improve data transmission reliability. By using single-path transmission and multi-path transmission,performance analysis of the presented strategy is given. In addition, effectiveness of the strategy is demonstrated by simulation.
Based on Technology Acceptance Model (TAM), this paper is the first one which research consumers' using intention of mobile reading. Multiple regression analysis is used to analyze effects to Chinese consumers' intention and attitudes on using mobile reading by perceived usefulness, perceived ease of use, perceived behavioral control, perceived entertainment, perceived payment and subjective norms...
Tilting train has the car body, bogie structure and suspension system which are different from existing rolling stock, and tilting system. A tilting train which is suitable for domestic environment was designed with a car made of ultra light nonflammable composite material, instead of existing aluminum car. Thus car body of tilting train shall be subject to constant maintenance to ensure the long...
This paper presents a study aimed at developing and validation of an instrument for Six Sigma Implementation in Small and Medium Sized Enterprises (SMEs) of India. It provides amalgamation of the quality literature by identifying 12 critical factors (areas) of Six Sigma. The Instrument consisting 42 items was design after extinctive literature review. The SMEs can used these measures individually...
The many diagnostic tools (like Conventional oil test, DGA, DLA and RVM) are available.. From the test results, it is observed that the transformer which has very good result from these techniques and even minimum moisture content in the winding may / will have very poor mechanical integrity. Winding cellulose paper may be aged to such an extent (assessed from DP) that may sudden force or transient...
In most of the embedded systems the basic theme is performing multiple tasks periodically. The execution time of each task in such systems is variable. Hence, it is crucial to schedule the tasks in an appropriate manner to guarantee reliable system performance. This paper deals with comparing scheduling methodologies which are commonly used in embedded systems. For this we consider here three methodologies...
An electrical power system is typically operated at least cost given some technical and reliability constraints. To that end, many utilities use deterministic methods such as n-1 criterion in order to ensure reliability. This method though being used worldwide and for a really long time can be expensive as contingencies occur rarely. In order to evaluate power systems, it must be noted that contingencies...
Risk based asset management (RBAM), the rationalization of decision making on physical assets, has been a rising profession for infrastructures in the Netherlands. Many companies report cost reductions and quality improvements it the same time. This makes one wonder whether Asset management could be of any help for fast developing countries, as they seem to struggle with both aspects. To test this,...
The energy efficiency in wireless sensor networks plays a very important role because of the limited power of the battery used within nodes. This paper presents efficient energy aware routing (EEAR) algorithm for wireless sensor networks, that makes routing decisions on the basis of node's residual energy. EEAR explores the optimized routing path by implementing a model which is function of the shortest...
Underwater wireless sensor networks (UWSNs) are prone to message loss due to their poor link condition with high bit error rate (BER). Retransmission-based mechanisms such as ARQ can be used for the reliability, however, they are not suitable for UWSNs due to the inherent long propagation delay of UWSNs. Therefore, a forward error correction (FEC) mechanism might be an alternative in order to guarantee...
Fault detection and diagnosis can effect system reliability and avoid expensive maintenance. In a manufacturing process, a simple fault can lead to environmental damage. In this way, one of the most commonly applied fault detection method is the parameter estimation technique. In this paper, we present an advanced algorithm for the estimation of electrical machine parameters by combining two approaches:...
A study was carried out to investigate customer satisfaction level towards the public transportation services provided by Consortium Express Bus Company. 200 respondents consisting of 65 men and 135 women participated in the study survey. The survey was conducted in three bus stations in Kuala Lumpur and Selangor areas, namely Pudu Bus Station, Kajang Bus Station, and Putra Bus Station. Importance-Performance...
This paper proposes a simple and practical RAID reconstruction optimization scheme, called JOurnal-guided Reconstruction (JOR). JOR exploits the fact that significant portions of data blocks in typical disk arrays are unused. JOR monitors the storage space utilization status at the block level to guide the reconstruction process so that only failed data on the used stripes is recovered to the spare...
This paper presents a novel method for evaluating facilities in regard to their designed intelligence. Facilities intelligence is defined as the designed capacity of a facility to acquire and process data and information to perform its adaptability to life-cycle circumstance changes in terms of people's requirements of well-being and energy efficiency. This definition is then formulated to quantify...
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