Archives-December 

The present students at the tertiary level need a learning environment in which they seek more involvement. The challenge for the English language teacher is to create such a situation and enhance the morale of the students. Cooperative learning certainly does augment the motivational levels of the students and provides a platform for better learning. The present paper explores the cooperative learning as a learning strategy and includes the findings of a questionnaire on English language learning at the tertiary level in VIT University. As competition is valued over cooperation, a student should be made aware of the need for healthy and positive interaction.

In this paper, a compact, low cost and high radiation efficiency antenna structure, planar waveguide, substrate integrated waveguide (SIW), dielectric resonator antennas (DRA) design using Advanced Design System (ADS) tool is presented. Since SIW is a high Q waveguide and DRA is a low loss radiator, then SIW-DRA forms an excellent antenna system with high radiation efficiency at millimeter-waveband, where the conductor loss dominates. The impact of different antenna parameters on the antenna performance is studied. Experimental data for SIW-DRA, based on two different slot orientations, at millimeter-wave band are introduced and compared to validate this antenna model. The measured gain for SIW-DRA single element showed a broadside gain of 5.51 dB. The Return Loss/Reflection coefficient is found to be -48.617 dB at the Cut off frequency 33.02 GHz.

Using MCNP6 to determine axial and radial neutron fluxes of the seven channels irradiation sites of 3 mCi of radium is tended for physics experiments on artificial radioactivity and irradiation facility in nuclear physics laboratory at (FSDM-USMBA) Fez Morocco. Ra-Be source in the interior of the shielded laboratory is sealed emanation-tight into a brazed nickel and it’s eccentrically off the axis of the lead cylinder. Lead thickness and distance shield are so designed that the gamma-dose rate from the source remains small enough in all directions. The seven irradiation channels are arranged vertically within the paraffin block.

The knowledge of bioecology of any predator is essential to explore its biocontrol potential. This study presents the effect of different temperature regimes i.e., 22-27°c and 27-32°c on the development and survival of the predator Cydnocoris gilvus (Heteroptera:Reduviidae). Both temperatures showed deleterious effects on nymph development and nymph survival. The stadial period decreased with increasing temperature. The maximum rate of nymphal and egg development occurred at 27-32°C temperature range. When compared both temperature regimes in the laboratory, the incubation period averaged 8.7±0.3 and 4.0±0.1 respectively. The five nymphal stadia averaged 8.7, 8.0, 11.25, 11.25, 16.5, 84.5 and 4.0, 5.0, 8.6, 6.57, 8.43, 12.5 respectively. Total developmental time averaged 139.5d and 41.1d respectively.

This paper employs widely used Water Quality Index (WQI), which is valuable and unique rating to depict the overall water quality status in a single term and simple (e.g., good or poor) for reporting to authorities management and the public in a consistent manner , that is helpful for the selection of appropriate treatment technique to meet the concerned issues. The water quality of Muthanna Province has been assessed from 2011 to 2014 to express the suitability of water for drinking purposes. Water quality data obtained from two sampling sites. According to the WQI values, the water quality at most of the sites was within an environmentally satisfactory condition during summer, and during the winter. Generally, the results showed that water quality varied from Excellent to Medium range during seasons. The results of the study confirm the suitability of all selected water sources for drinking purposes. Since this is unprecedented attempt to apply WQI on Muthanna , the used WQI proved to be a highly effective tool to assess the water quality of Muthanna in simple way, and its use is strongly recommended.

We are very happy to announce that from 17th November 2018, Dr. A.C. Lal Kumar has joined the team of Elixir Editorial Advisory Board. He/She will carry a special responsibility for dealing with manuscripts based on Educational Psychology. Dr. A.C. Lal Kumar is working as Assistant Professor, G.E.T. B.Ed M.Ed College of Education, VS Puram Village, Paradarami Post, Gudiyattam Taluk, Vellore District, Tamil Nadu, India. The appointment of Dr. A.C. Lal Kumar as member, Editorial Advisory Board strengthens the links and will make it easier for prospective authors to establish contact with the journal.

We are very happy to announce that from 4th July 2018, Dr. Taha Awad Allah El-Sayed has joined the team of Elixir Editorial Advisory Board. He/She will carry a special responsibility for dealing with manuscripts based on Civil Engineering. Dr. Taha Awad Allah El-Sayed working as Assistant Professor of Reinforced Concrete Structures of Civil Engineering Faculty of Engineering, Shoubra, Benha University. The appointment Dr. Taha Awad Allah El-Sayed as member Editorial Advisory Board strengthens the links and will make it easier for prospective authors to establish contact with the journal. Please send any expressions of interest to elixirpublishers@gmail.com.

We are very happy to announce that from 21st February 2011, Dr. Abdul Talib Bon has joined the team of Elixir Editorial Advisory Board. He will carry a special responsibility for dealing with manuscripts based on the Production Management. Dr. Abdul Talib Bon is currently an Associate professor at Business and Entrepreneurship, Universiti Tun Hussein Onn Malaysia, 86400 Parit Raja, Batu Pahat, Johor. The appointment of Dr. Abdul Talib Bon as member Editorial Advisory Board strengthens the links with Asia and will make it easier for prospective authors to establish contact with the journal. Please send any expressions of interest to chiefeditor@elixirjournal.org. Sincerely Editor-in-Chief

We are very happy to announce that from 21st March 2019, Dr. Pradip Kumar Das has joined the team of Elixir Editorial Advisory Board. He/She will carry a special responsibility for dealing with manuscripts based on Commerce. Dr. Pradip Kumar Das is working as Associate Professor, H.O.D., Department of Commerce, Jagannath Kishore College, Purulia (West Bengal), India. The appointment of Dr. Pradip Kumar Das as member Editorial Advisory Board strengthens the links and will make it easier for prospective authors to establish contact with the journal. Please send any expressions of interest to elixirpublishers@gmail.com.

This paper studies the behavior of both green cement and Geopolymer concrete. Twenty-seven concrete mixes were prepared and tested in the fresh and hardened state. The properties of both Ordinary Portland Cement Concrete (OPCC) and Geopolymer concrete (GC) incorporating quarry limestone waste as a replacement of fine aggregate were studied. It was found that quarry waste fine aggregate increased the slump of fresh cement and Geopolymer concrete up to 50% as a replacement for fine aggregate. Improvements of properties of both cement and Geopolymer concrete were detected when quarry waste fine aggregate was replaced up to 50% of fine aggregate. The overall test results revealed that quarry limestone waste fine aggregate can be consumed efficiently in both cement and Geopolymer concrete up to 50%.