May 2012

Procedure for treatment of hazardous waste by MID-MIX procedure in Serbia

  This paper presents adequate treatment characteristics of the problem of hazardous waste while providing a specific example of the problem. Hazardous waste being discussed here is galvanic sludge. Furthermore, not only is the hazardous waste problem within a company discussed, but also on a national level. The MID-MIX® procedure was chosen and described as an optimal solution for adequate hazardous waste...

Author(s): Brkljač Nebojša, Šević Dragoljub, Beker Ivan, Kesić Igor and Milisavljević Stevan

May 2012

Methodology to Size an Optimal Standalone Hybrid Solar-Wind-Battery System using Genetic Algorithm

  This paper presents a methodology to calculate the optimal size of a stand-alone hybrid Wind- photovoltaic (PV)-Battery system. The study was interested in the influence of the wind and solar potential and the shape of the load profile on the optimal configuration. The collection of one year of wind speed, solar radiation and ambient temperature, recorded every hour in Kayar and Potou located in the...

Author(s): Ould Bilal B, , Ndiaye P. A, Kébé C.M.F. , Sambou V and Ndongo M

May 2012

Modeling and characterization of all possible triple pass EDFA configurations

  The main purpose of designing multi-stage erbium-doped fiber amplifiers (EDFAs) is to achieve higher gain and lower noise figure for long haul optical communication. Among the multi-stage EDFAs, triple pass EDFAs were chosen in this research. This paper presents all possible triple pass EDFA configurations. The well-established one-stage mathematical models were modified to design two-stage and...

Author(s): Fowzia Akhter, M. I. Ibrahimy, A. W. Naji and H. R. Siddiquei

May 2012

A new technique for characterization of epileptic spikes using wavelet transform and neural network

  A technique proposed for the automatic detection of spikes in electroencephalograms (EEG). The important features of the raw EEG data were extracted using two methods: Wavelet transform and energy estimation. This data was normalized and given as input to the neural network, which was trained using back propagation algorithm. Energy estimation was used as an amplitude threshold parameter. The wavelet...

Author(s): H. N. Suresh, Vinay Balasubramanyam, Mallikarjun H.M.

May 2012

Minimal and maximal bi-ideals in ordered ternary semigroups

  In this paper, some characterizations of minimal and maximal bi-ideals of ordered ternary semigroups were given. Moreover, the results of minimal and maximal bi-ideals of ordered ternary semigroups to ordered n-ary semigroups were generalized.   Key words: Bi-ideals, minimal bi-ideals, maximal bi-ideals, ordered ternary semigroups, ordered n-ary semigroups.

Author(s): Ronnason Chinram, Samruam Baupradist, and Sompob Saelee

May 2012

An estimation of time-varying signal frequency using recent finite observations

  For estimating a time-varying signal frequency, an alternative estimator with a finite memory structure is proposed. The proposed estimator is developed under a maximum likelihood criterion using only the most recent finite observations on the window. The proposed estimator is first represented in a batch form, and then in a recursive form for computational advantage. The proposed estimator is shown...

Author(s): Pyung Soo Kim

May 2012

The stored heat in a solar pond for salt production in Northeast Thailand

  This research presents the experimental study of heat extraction from solar pond with thermosyphonic coils for salt production in Northeast Thailand. The solar pond has an area of 30 m3. The thermophonic coil consisted of 15 U-shaped high density polyethylene (HDPE) tubes with a diameter of 25.4 mm. All 15 U-shaped HDPE tubes were connected to the upper side of each element and then connected to the upper...

Author(s): R. Lammayot, S. Rittidech and S. Wiriyaumpaiwong