Articles


Real-Time Transmission Of Voice Over 802.11 Wireless Networks Using Raspberry Pi

Nalini Bagal, Shivani Pandita

International Journal of Emerging Trends in Science and Technology, Vol. 2 No. 08 (2015), 1 August 2015
https://doi.org/10.18535/ijetst/v2i8.01

With increasing demands of Electronics products in the domain of the industrial & Consumer application, it becomes necessary to come up with new ideas of electronic products. In the field of communication, present real-time communication audio transmission uses technologies like WiMax, IEEE 802.11, 3G and Bluetooth. But audio-streaming through Bluetooth or radio waves have drawbacks of range and not secure as intruders can get streamed feed. In this paper a fully-functional embedded device has been proposed which is able to stream or transmit audio in real-time over Wi-Fi (IEEE 802.11). This system uses a small credit card sized single board called Raspberry Pi, display, webcam, Wi-Fi and headphone/speakers. This system is a standalone system and does not require any single PC to take or receive the data from camera and headphone/MIC and send to another user. Operating speed of this platform is in 700MHz and it supports live audio streaming. As it has onboard Audio codec, it is possible to connect to user by just accessing the IP address of another user. SSH (Secure SHell) is used for secure data communication, remote command-line login, remote command execution, and other secure network services between two networked nodes. Open source Linux based OS is used to keep the cost low.  

Congestion Control In Wireless Peer Networks

Manju M M, Santhy Ajish, Rakshith K

International Journal of Emerging Trends in Science and Technology, Vol. 2 No. 08 (2015), 1 August 2015

A Mobile Ad hoc Network (MANET) is a continuous self configuring infrastructure less network of mobile devices connected without wires. In this network several nodes exchange packets simultaneously to the destination node. Due to congestion in the network the transmitted packets doesn’t get delivered to destination efficiently. So here AODV (Ad Hoc On Demand Distance Vector) protocol with ATIM (Ad Hoc Traffic Indication Message) window is used to overcome   the problem of congestion and power saving is done through IEEE 802.11 power saving mechanisms. The conclusion of the paper is done by evaluating the performance of the AODV protocol with respect to Delay, Energy and Packet delivery fraction.


Keywords: DSR, MANET, AODV, ATIM

An Energy Efficient Multi-Target Tracking in Wireless Sensor Networks Based on Polygon Tracking Method

Josna Jose Vadakkan, Vijayakumar Raghavanpillai

International Journal of Emerging Trends in Science and Technology, Vol. 2 No. 08 (2015), 1 August 2015

Wireless sensor networks (WSN) have been considered as a promising system for area surveillance applications. As it moves through a sensor network target tracking has become an increasingly important application in Wireless Sensor Networks. Target detection deals with finding spatial coordinates of a moving object and tracking deals with finding the coordinates and being able to track its movements. Tracking mobile targets using sensor networks is a challenging task. Existing work mostly requires organizing groups of sensor nodes with measurements of a target’s movements or accurate distance measurements from the nodes to the target, and predicting those movements. These are, however, often difficult to accurately achieve in practice, especially in the case of unpredictable environments, sensor faults, etc .In such cases the new tracking framework, called FaceTrack, suits best. FaceTracking employs the nodes of a spatial region surrounding a target, called a face. If a target is detected by a node after a time window, a target is detected by another node. It is assumed to be the same target or single object in FaceTracking method. But it achieves better tracking accuracy and energy efficiency for detecting and tracking single object. This paper proposes a new approach for multi target detection using FaceTracking or polygon tracking method. Simulations are carried out to underline the energy efficiency of the proposed method using NS2.

Chemistry, Physics sans Mathematics of Super Atom: A ‘Self’ Appraisal of post- Big Bang Universe

Dr. Rojukurthi Sudhakar Rao

International Journal of Emerging Trends in Science and Technology, Vol. 2 No. 08 (2015), 1 August 2015

We are merely on a Planet which is in the Universe but not the Universe itself.  The Universe is a circle of trust for us since its carbon age of 13.5 billions of years. Make believe kinetic galaxies are ruling the Universe dashing and colliding into one another as per the scientific observations. This Paper does not jump to haste of arguments  with regard to evolution of the Knowledge all along these 13.5 billion years on the  time scale to testify to the fact that knowledge transformed and became undependable in between the generation gaps of men and women as explorers for ‘human beings’ also subject to radical  transformations to give out  knowledge of scientific value exclusively to interpret their own  origin besides that of their home Planet as well as the Galaxies and the Universe as their originator, generator and destroyer.         

This Research Paper has no Mathematics to deploy intentionally to highlight as the one and only one  leading the minds  as made out to be for the last few Centuries since truly speaking, it was not Mathematics  to take credit in the self appraisal of the super atom’s big bang Universe till the last. On the other hand, the mains are led by Chemistry & Physics sans Mathematics when it comes to the Super Atom accountable for the transparency of the standardized Knowledge worthy of authority to live a human life of 100 years on an average in the post-Big Bang Universe.

Key Words:  post-big bang, Super atom, Universe, Chemistry, Physics, Mathematics.

Fusarium Wilt of Garden Egg (Solanum Melongena) At Imawa Village of Kura Local Government of Kano State, Nigeria

Bello Hassan Jakada, Sauban Musa Jibril

International Journal of Emerging Trends in Science and Technology, Vol. 2 No. 08 (2015), 1 August 2015

This was a Survey of fusarium wilt of Solanum melongena at Imawa village of Kura Local Government area located on N11o47’56.8†and 008o27’33.7â€. During the survey, Four (4) plots were visited weekly for 8 weeks. Symptoms of disease were carefully observed from 35 egg plants (Solanum melongena) selected at random. 10-20g of soil from the depth of 2-4cm near the roots of both healthy and infected egg plants was collected using spatula, Composite mixture of the soil sample was made for isolation and identification of the wilt pathogen. Isolation of the pathogen was done using serial dilution technique where 1g of the soil was mixed with 9ml of distilled water to obtain 10-1 up to 10-4 and then 1ml was poured directly in to prepared P.D.A and stored at room temperature for 5-7 days after which the dominant  pathogen was identified. The dominant species identified are fusarium oxysporum (4 isolate with 50%) abundance followed by Rhizophus stolonifer  (2 isolate with 25%) and Aspergillus niger (2 isolate with 25%). The incidence was calculated and plot B was found to have the highest incidence. The data obtained was subjected to chi square statistical analysis and the data showed significant difference in terms of infection between the plots.

Key words: Fusarium Wilt, Solanum melongena, Identification, Isolation, Wilt Pathogen.