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In this paper, we propose a feature extraction method and fusion algorithm which is constructed by PCA and LDA to detect a fault state of the induction motor that is applied over the whole field of a industry. After yielding a feature vector from current signal which is measured by an experiment using PCA and LDA, we use the reference data to produce matching values. In a diagnostic step, two matching values which are respectively obtained by PCA and LDA are combined by probability model, and a faulted signal is finally diagnosed. As the proposed diagnosis algorithm brings only merits of PCA and LDA into relief, it shows excellent performance under the noisy environment. The simulation is executed under various noisy conditions in order to demonstrate the suitability of the proposed algorithm and it showed more excellent performance than the case just using conventional PCA or LDA [ABSTRACT FROM AUTHOR]

The most of users of personal computer use web browsers such as MS(Microsoft) Internet Explorer, Mozilla Firefox, and so on for accessing to internet. Especially MS Internet Explorer which is used for internet access is a module to execute local files and to install softwares that are activated by install shield. Also Explorer is the same as Shell. Analyzing "index.dat" log which is the history of executing files and accessing web sites makes security audit effective. In this paper, by analyzing Windows "index.dat" and Mozilla Firefox cache files with time analysis, we suggest a method to perform auditing of cyber crimes such as information leakage and hard disk vulnerability. [ABSTRACT FROM AUTHOR]

In this paper, an energy saving mechanism is proposed for the IEEE 802.15.4 Low-Rate Personal Area Network (LR-PAN). In the current version of IEEE 802.15.4 standard, each node can enter the sleep mode only during the inactive portion of superframe. In our scheme, the coordinator dynamically determines duty cycle and adjusts the interval of sleep mode by varying BO (Beacon Order) based on the arrival rate of packets in the network observed. Analytical results show that our scheme with a proper adjustment of BO can increase the average sleep time and shorten the energy consumption. [ABSTRACT FROM AUTHOR]

The High-Rate WPAN has been designed to provide a very high-speed short-range transmission capability with QoS provisions. However, the IEEE 802.15.3 standard does not specify the scheduling scheme. In this paper, we propose a priority management scheme for the IEEE 802.15.3 HR-WPAN, in which channel time allocations are scheduled, based on priority levels of data frames. We also analyze performance of management scheme by using an M/M/1 with priority queuing model. Our performance model has been validated via simulations. [ABSTRACT FROM AUTHOR]

By considering the number of independent variables, we present a new method for finding an upper bound on the maximum differential probability (MDP) for r(r ≥ 2)-round substitution-permutation networks (SPNs). It first finds an upper bound for 2-round SPNs and then uses a recursive technique for r(r ≥ 3)-round SPNs. Our result extends and sharpens known results in that it is more effective for calculating MDP for r(r ≥ 3)-round SPNs and applicable to all SPNs. By applying our method to ARIA, we get an estimated bound of 1.5 × 2-98 on MDP for 6-round ARIA. Keywords: Cryptography, Differential cryptanalysis, Linear cryptanalysis, Substitution-permutation networks, Branch number, Independent variables, AES, ARIA. [ABSTRACT FROM AUTHOR]