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International Journal of Advances in Applied Sciences

IJAAS
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Published by Institute of Advanced Engineering and Science

ISSN : 22528814 EISSN : 27222594 DOI : http://doi.org/10.11591/ijaas

Core Subject : Science, Education, Social,

Earth & Planetary Sciences Environmental Science Materials Science & Nanotechnology Mathematics Physics

International Journal of Advances in Applied Sciences (IJAAS) is a peer-reviewed and open access journal dedicated to publish significant research findings in the field of applied and theoretical sciences. The journal is designed to serve researchers, developers, professionals, graduate students and others interested in state-of-the art research activities in applied science areas, which cover topics including: chemistry, physics, materials, nanoscience and nanotechnology, mathematics, statistics, geology and earth sciences.

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Articles 6 Documents

Search results for , issue "Vol 3, No 3: September 2014" : 6 Documents clear

The Effects of Stacking Sequence Layers of Hybrid Composite Materials in Energy Absorption under the High Velocity Ballistic Impact Conditions – An Experimental Investigation Elias Randjbaran
International Journal of Advances in Applied Sciences Vol 3, No 3: September 2014
Publisher : Institute of Advanced Engineering and Science

In the current study, the effects of stacking sequence layers of hybrid composite materials on ballistic energy absorption, which were fabricated from Kevlar, carbon, glass fibres and resin have been experimentally investigated at the high velocity ballistic impact conditions. All the samples have equal mass, shape and density, but they have different stacking sequence layers. After running the ballistic test in the same conditions, the final velocities of the bullets showed that how much energy absorbed by the samples. The energy absorption of each sample through the ballistic impact has been calculated, accordingly , the decent ballistic impact resistance materials could be found by conducting the test. This paper can be further studied in order to characterise the material properties.

Biomonitoring of Zn pollution by using Leaves, Stems and Roots of a Medicinal Plant Centella Asiatica C. K. Yap; Ong G. H.
International Journal of Advances in Applied Sciences Vol 3, No 3: September 2014
Publisher : Institute of Advanced Engineering and Science

In this study, three parts (leaves, stems and roots) of Centella asiatica and surface soils were collected from 11 geographical sampling sites in Peninsular Malaysia. Ranges of Zn concentrations (µg/g dw) in soil was 102.70-826.11 while 81.16-198.56 for leaves, 56.27-146.93 for stems and 95.72-285.00 for roots. In C. asiatica, Zn accumulation was found the highest in roots followed by leaves and stems. Correlation analysis based on Zn concentrations between the three parts of plants and soils were found to be significantly (P< 0.05) correlated (root-soil, R= 0.973; leaves-soils, R= 0.955; stem-soils, R= 0.952). For the transplantation study, three sites were selected as unpolluted (UPM), semi-polluted (Balakong) and polluted sites (Sg. Juru). Based on transplantation study under experimental field and laboratory conditions, Zn concentrations in the leaves, stems and roots of C. asiatica were significantly (P< 0.05) higher after three weeks. The Zn accumulation was the highest in Sg. Juru, followed by Balakong and UPM which were in accordance with the Zn contamination levels in the soils. Thus, these experimental findings confirmed that leaves, stems and roots can reflect the Zn levels in the soils where C. asiatica were found. After three weeks of back transplantation to clean soils, the Zn levels in the three parts were still higher than the initial Zn level even though elimination occurred. In conclusion, all the above findings indicated that the leaves, stems and roots of asiatica are good biomonitors of Zn pollution.

Critical Impact Energy of Flat Nose Hard Projectile Causing Early Scabbing in Concrete Slab Dr. Qadir Bux alias Imran Latif; Assoc. Prof. Dr. Ali Al Nuaimi; Prof. Dr. Ismail Abdul Rahman; Prof. Dr. Ahmad Mujahid Ahmad Zaidi
International Journal of Advances in Applied Sciences Vol 3, No 3: September 2014
Publisher : Institute of Advanced Engineering and Science

In this paper, 2D numerical simulation finite element analysis has been carried out for critical impact energy of flat nose hard projectile causing early scabbing in concrete slab, based on reflected stress wave propagation with elastic assumption of the classic wave equation, using ABAQUS software. Numerical simulation predictions were compared with experimental data and with the well established UMIST, NDRC, Li and Reid formulae and found comparable and reliable. The influence of hard projectile diameter with flat nose, and concrete wall thickness on critical impact energy was also investigated. It was found that the effect of critical impact energy is directly proportional to the thickness of concrete target and inversely proportional to the diameter of flat nose hard projectile.

Sensitivity analysis of simplified low cost converging thermal wave technique for thin bilayer solid M. Shahril Shahril Bin Husin
International Journal of Advances in Applied Sciences Vol 3, No 3: September 2014
Publisher : Institute of Advanced Engineering and Science

In this paper, the sensitivity analysis of thermo physical parameters of the semi-infinite bilayer was presented by using a simplified converging thermal wave model. This is done under the consideration that radial flow of converging thermal wave substantially dominates in the first layer and axial thermal wave, dominates in the second layer. The sensitivity of the correlated parameters due to the 5%, 10% and 100% of increment were evaluated.. The results of the calculated temperature were simulated by Mathematica software, in order to generate a sensitivity analysis and examined by graphs. From this analysis, we concluded the optimum conditions, hence to be applied in the real experiment. Our merit on this report is for introducing a simple method of optical transient heating by using low cost equipment such as camera’s flash lamp and thermocouple, which may also apply to the short pulse laser measurement. A brief theory of the present work is presented and the results obtained from the simulation are discussed.

Insilico Identification of Potent Inhibitor from Andrographis Paniculata for ESBLs Aysha NIL Mohamed; Mumtaj Peer Mohammed; Dhamotharan R
International Journal of Advances in Applied Sciences Vol 3, No 3: September 2014
Publisher : Institute of Advanced Engineering and Science

The study aimed at docking of TEM - 52 & modeled CTX – M -13 by ethanol extracted compounds from Andrographis paniculata and to predict their binding efficiency. BLAST-P was performed to retrieve suitable templates for homology-modeling using the bla CTX-M sequences obtained from Genbank. Protein Data Bank (PDB) IDs of these templates were retrieved. Models were prepared using Swiss-Model-Server and verified by Procheck and 3D programmes RAMPAGE was used to prepare Ramachandran plots. The 13 - Hexyl - oxa - cyclotridec - 10 - En- 2 - one was selected as ligand for this docking study from the data generated by Mass spectrometry analysis of methanol extracted compounds from Andrographis paniculata. The structure was drawn manually with aid of JME and its drug likeliness & molecular properties was calculated using Pre Admet server. Docking was performed by using docking server. Since the docking results proved that the amino acid residues Ser70,Ser 130,Ser237,Arg 276 and Thr235 of CTX-M-13 (enzyme) make important contacts with the ligand, researchers are expected to duly utilize this information for designing more potent and CTX - M inhibitors.

Inflationary Kaluza- Klien Cosmic String In Scalar-Tensor Theory Of Gravitation Satish Janjeti
International Journal of Advances in Applied Sciences Vol 3, No 3: September 2014
Publisher : Institute of Advanced Engineering and Science

Abstract We have investigated a spatially homogeneous and anisotropic Kaluz-Klien space time with cosmic strings in the presence of Sen Dunn theory as source. Exact solutions of the Einstein field equations are presented via a suitable power law assumption. Some of models obey geometric strings, massive strings and Takabayasi’s equation of state .We find that the constant value of deceleration parameter is reasonable for the present day universe. Some physical and geometric behaviour of the models are also discussed.

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