International Journal of
Physical Sciences

  • Abbreviation: Int. J. Phys. Sci.
  • Language: English
  • ISSN: 1992-1950
  • DOI: 10.5897/IJPS
  • Start Year: 2006
  • Published Articles: 2572

Table of Content: 16 May; 8(18)

October 2013

Efficient coupling of light wave into slow modes planar photonic crystal slab waveguides

The generation of the slow modes in a planar photonic crystal waveguide has been highlighted theoretically and experimentally in the two last decade. However, the exploitation of this phenomenon to control the light propagation in the optical integrated circuits faces several obstacles and technological locks. On the one hand, it is almost impossible to excite this type of modes in the slowing light devices because of...

Author(s): H. Belkebir, A. Qarchi, A. Mir and A. Bouzid    

May 2013

Synthesis of nickel ferrite nanoparticles by co-precipitation chemical method

In this research work, we have prepared nickel ferrite nanoparticles by using chemical route. Nanoparticle materials are characterized using X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), vibrating sample magnetometer (VSM),transmission electron microscopes (TEM) and energy dispersive X-ray (EDX) systems. We have determined magnetic properties, size,...

Author(s): Aliahmad, M., Noori, M., Hatefi Kargan, N. and Sargazi, M.    

May 2013

High power Bessel-like laser beam by thin disk geometry

We have numerically shown that a high power Bessel-Gauss beam can be generated by a solid state thin disk laser using an axicon-based resonator. Ytterbium ions doped in the Yttrium Aluminum Garnet (YAG) crystal was utilized in this configuration as an active medium. We obtained the output power, the intensity as well as phase profiles on the output coupler and the active medium.   Key...

Author(s): R. Aghbolaghi, S. Batebi and J. Sabaghzadeh

May 2013

A learning automata-based algorithm using stochastic minimum spanning tree for improving life time in wireless sensor networks

Several algorithms have already been provided for problems of data aggregation in wireless sensor networks, which somehow tried to increase networks lifetimes. In this study, we dealt with this problem using a more efficient method by taking parameters such as the distance between two sensors into account. In this paper, we presented a heuristic algorithm based on distributed learning automata with variable actions set...

Author(s): Chamran Asgari, Rohollah Rahmati Torkashvand and Masoud Barati

May 2013

Performance evaluation of broadband access network based on subcarrier multiplexing (SCM): Spectral amplitude coding optical code division multiple access

A hybrid spectrally amplitude coded (SAC) optical code division multiple access (CDMA) with subcarrier multiplexing (SCM) scheme is a potential candidate for future broadband access solutions in the communication network. In this work, the performance of hybrid technique is investigated. Theoretical derivations are developed based on the zero cross correlation (ZCC) code. The performances are evaluated taking into...

Author(s): Junita Mohd Nordin, Syed Alwee Aljunid, Anuar Mat Safar, Amir Razif Arief, Rosemizi Abd Rahim, R. Badlishah Ahmad and Naufal Saad

May 2013

Feature subset selection using association rule mining and JRip classifier

Feature selection is an important task in many fields such as statistics and machine learning. It aims at preprocessing step that include removal of irrelevant and redundant features and the retention of useful features. Selecting the relevant features increases the accuracy and decreases the computational cost. Feature selection also helps to understand the relevant data, addressing the complexity of dimensionality. In...

Author(s): Waseem Shahzad, Salman Asad and Muhammad Asif Khan

May 2013

Hybrid wavelength division multiplexing/time domain multiplexed (WDM/TDM) using radio over fiber technique with 16QAM at 2.5 Gbps

There is growing demand for higher bit rates in the access domain due to the emergence of bandwidth-hungry applications such as video-on-Demand and file sharing. Gigabit-capable passive optical network (GPON) is the most important PON. In a hybrid wave division multiplexing/time division multiplexing (WDM/TDM passive optical network (PON), Quadrature amplitude modulation (QAM) is proposed as a way to achieve...

Author(s): A. O. Aldhaibani, S. A. Aljunid, Hilal A. Fadhil and M. S. Anuar

May 2013

New monitoring method based principal component analysis and fuzzy clustering

This work concerns the principal component analysis applied to the supervision of quality parameters of the flour production line. Our contribution lies in the combined use of the principal component analysis technique and the clustering algorithms in the field of production system diagnosis. This approach allows detecting and locating the system defects, based on the drifts of the product quality parameters. A...

Author(s): Khaled Ouni, Hedi Dhouibi, Lotfi Nabli and Hassani Messaoud

May 2013

An investigation to compare the effectiveness of packet loss based on proposed methods in literature

Optical flow routing is an optical networks that technique used to ensure that the packet is always in the sequence order. This research is intended to ensure that the network traffic is enhanced of the quality of service (QoS). An analytical method is used in order to show its effectiveness of flow routing. There are three cases that have been investigated in this research investigation namely, packet discards (PD),...

Author(s): A. A. Rahman, K. A. Noordin and H. M. Farhad

May 2013

Application of vertical electrical sounding and horizontal profiling methods to decipher the existing subsurface stratification at river Segen dam site, Tigray, Northern Ethiopia

The study area Segen river dam site is situated in the southeastern zone of Tigray National Regional State in between Hintalo Wajirat and Enderta Weredas. It is geographically located at 37P between 541400 to 542600 UTME Latitude and 1481600 to 1482600 UTMN Longitude about 35 km southwestern part of Mekelle, the capital of Tigray National Regional State. The study was conducted having an objective of the geophysical...

Author(s): Abraham Bairu, Yirgale G/her and Gebrehiwot G/her