K. Rama Krishna ¹, D. V. Sudhakar Rao ²

Affiliations
1 Department of Horti., Postharvest Technology, UHS, GKVK Campus, Bangalore-560065, Karnataka, IN
2 2Division of Post Harvest Technology, IIHR, Bangalore-500089, Karnataka, IN

Abstract

The effect of chitosan coating on the physico-chemical characteristics of guava cv. Allahabad Safeda fruits stored at room temperature (28-32°C and 32-41% RH) was investigated. The fruits were treated with chitosan (1% and 2%) to study its effect on the postharvest life and quality of guava. Various storage attributes were studied at successive intervals of storage. In general, Physiological Loss in Weight (PLW %), respiration rate and TSS increased while firmness and acidity decreased with storage duration. Among various treatments, 1% chitosan treatment was found effective in extending the shelf life upto7 days, as it delayed ripening and retained greater firmness with reduced PLW%. However, the fruits treated with 2% chitosan showed uneven ripening and didn't turn yellow even at the end of shelf life, attributed to CO2 injury.

Keywords

Chitosan, Guava, Postharvest Quality, Respiration, Storage

Full Text

   

K. Rama Krishna ¹, K. R. R. Mohan Rao ¹

Affiliations
1 Department of Electronics and Computer Engineering, KL University, Vijayawada, Andhra Pradesh, IN

Abstract

Objective: To monitor and control the total area of a Wireless Sensor Network (WSN) without any coverage holes that impair the sensor node functionalities. Methodology: We propose an exhaustive arrangement, which operates in two phases, hole detection and hole healing. We design our system based on Least-Disruptive topology Repair (LeDiR) algorithm. LeDiR scheme enhances the conventional and the extant route discovery techniques in the network, easing the tasks of hole detection and hole healing. Finding/Improvements: We implement our system in NS-2. Our proposed system implements LeDiR, effectively controls the WSN of coverage holes and successful in implementing hole detection and hole healing. We also demonstrate that our scheme is successful in overcoming both the coverage holes and routing holes.

Keywords

AODV, Coverage Holes, Hole Detection, Hole Healing LeDiR, Mobile Networks, NS-2, Routing, Wireless Sensor Networks.

Full Text

   

D. B. K. Kamesh ¹, K. Rama Krishna ¹, J. K. R. Sastry ¹

Affiliations
1 Department of Electronics and Computer Engineering, K L University, Vaddeswaram - 522502, Guntur District, Andhra Pradesh, IN

Abstract

Background/Objectives: The main objective of this paper is to provide a novel method of identification and authentication of a user through a process of enhancing the password level protection to provide authorised use of the resources hosted on the WEB. Methods/Statistical Analysis: The authentication process that uses mind metrics has been implemented within ARM7 Micro controller which is made to act as central server. The process of authentication and the implementation of the same have been explained through an architectural diagram. Software which has been written using KEIL IDE is burnt into a Micro controller and the implementation of an authentication process has been implemented through a GSM device connected to a Micro controller. Findings: A novel approach that considers a Personnel secret token known as mind metrics has been presented. The server sends across the mind metrics to the user after completing the identification phase and the user from then uses password and mind metrics to carry secured communication between the user and the server. Applications/Improvements: The method has been implemented both as a software and hardware solution. The software solution has been implemented within a GSM application for enabling text message notification.

Keywords

ARM, Authentication, KEIL IDE, Key Loggers, Login systems, Mind Metrics.

Full Text