INVESTIGATION ON ENERGY BASED DATA GATHERING APPROACH FOR WSN

Wireless Sensor Networks plays a vital role in all emerging areas of Wireless Platforms like Interne of Things (IoT), WiFi, WiMAX etc. Sensor nodes are communicated with or without the presence of administrator. Data gathering is a major issue in WSN which influences the throughput, energy and data delivery. In previous research, there was not taken efforts to focus on balanced data gathering.  In this research, we propose Reliable Energy Efficient Data Gathering Approach (REEDGA) to balance data gathering and overhead. To achieve this, proposed work consists of three phases. In first phase, estimation of information gathering is implemented through stable paths. Stable paths are found based on link cost. In second phase, data gathering phase is initialized to save energy in the presence of mobile sensor nodes. Overhead is kept low while keeping round trip time of gathered data. From the analytical simulation using NS2, the proposed approach achieves better performance in terms of data delivery rate, data gathering rate, throughput, delay, link availability and control overhead

Experimental Analysis OF Heat Transfer and Pressure Drop for Tube-in-fin Heat Exchangers Using Ice Slurry in HVAC System

AbstractIce slurries can be used both for cold storage in place of chilled water or ice and as a secondary refrigerant since, up to certain concentrations, they can be pumped directly through distribution pipe works and heat exchangers. For ice slurries to become more widely accepted, however, more engineering information is required on fluid flow and heat transfer characteristics. This paper reports on the results of experimental investigations of heat transfer and pressure drop of 14 % ice fraction, 16% ethylene glycol, and 70% water by volume flowing in a tube-fin exchanger. And the airflow rate is varied from between 1 m/s to 3 m/s. In this flows range, due the ice fractions caused around a 5% in the pressure drop. The overall heat transfer capacity of the heat exchanger was found to increase by more than 26% with melting ice slurry flow compared to chilled water flow. In a practical application, for a given thermal load this would lead to between 70% and 80% reduction in flow rate and pressure drop compared to chilled water cooling systems.Keywords: Heat transfer, Pressure drop, Ice slurr

Microscopic visualization of regeneration in scale worm Paralepidonotus sp. (Grube, 1878)

360-364Regeneration of damaged or lost body parts is an ecologically important process in the animal realm. Like many other annelids, segmented worms and bearded scale worm, Paralepidonotus sp. is capable of regenerating its anterior elytra and posterior body segments and terminal structures that are lost due to amputation. In aquaculture industry, scale worms have importance as common live feed. In this context, we studied the morphology and organization of tissues in Paralepidonotus sp. populations which have ability to regenerate the anterior elytra and posterior region. The study revealed that the process of blastema formation in the anterior (Elytra) and posterior segments of Paralepidonotus sp. was normal and got regenerated to its original state during 9th to 12th day of experiment, and thus this species can be used for mass scale production to cater to the demand of aquaculture as suitable live feed for feeding the brooders both in shrimp and ornamental Aquaculture

Vertebral column deformity in six species of wild fish at the Coromandel coast, Bay of Bengal India

This study reports radiological deformities in the vertebral column of six fishes viz, Scomberomorus commerson, Chanos chanos, Sillago sihama, Pampus chinensis, Rastrelliger kanagurta and Netuma thalassina that were collected from the Coromandel coast, Bay of Bengal. Four main different types of vertebral column deformities were found: (i) whole body kypho-lordo-kyphosis (Sillago sihama, Rastrelliger kanagurta, Netuma thalassina); (ii) tail region kypho-lordosis (Scomberomorus commerson); (iii) tail region lordo-kyphosis (Chanos chanos); (iv) platyspondyly (Pampus chinensis). Seven types of vertebra body deformities, describing the pathology of single vertebrae, were present; reduced intervertebral space, compression, fusion, compresion & fusion, fusion center, dorsal wedge-shaped and compressed & dorsal wed-shaped. The present documentation of deformities in six different species that are also very different with regard to habitat, diet and swimming activity may suggest that fish deformities are widespread in the study area.publishedVersio

A study on tuberculosis disease disclosure patterns and its associated factors: Findings from a prospective observational study in Chennai

BACKGROUND: Disclosure of tuberculosis (TB) status by patients is a critical step in their treatment cascade of care. There is a lack of systematic assessment of TB disclosure patterns and its positive outcomes which happens dynamically over the disease period of individual patients with their family and wider social network relations. METHODS: This prospective observational study was conducted in Chennai Corporation treatment units during 2019–2021. TB patients were recruited and followed-up from treatment initiation to completion. Information on disease disclosures made to different social members at different time points, and outcomes were collected and compared. Bivariate and multi variate analysis were used to identify the patients and contact characteristics predictive of TB disclosure status. RESULTS: A total of 466 TB patients were followed-up, who listed a total of 4039 family, extra familial and social network contacts of them. Maximum disclosures were made with family members (93%) and half of the relatives, occupational contacts and friendship contacts (44–58%) were disclosed within 15 days of treatment initiation. Incremental disclosures made during the 150–180 days of treatment were highest among neighbourhood contacts (12%), and was significantly different between treatment initiation and completion period. Middle aged TB patients (31 years and 46–55 years) were found less likely to disclose (AOR 0.56 and 0.46 respectively; p71%). CONCLUSION: Findings explain that family level disclosures were predominant and disclosures made to extra familial network contacts significantly increased during the latter part of treatment. Emotional support was predominantly received by TB patients from all their contacts post disclosure. Findings could inform in developing interventions to facilitate disclosure of disease status in a beneficial way for TB patients

The icephobic performance of alkyl-grafted aluminum surfaces

This work analyzes the anti-icing performance of flat aluminum surfaces coated with widely used alkyl-group based layers of octadecyltrimethoxysilane, fluorinated alkylsilane and stearic acid as they are subjected to repeated icing/deicing cycles. The wetting properties of the samples upon long-term immersion in water are also evaluated. The results demonstrate that smooth aluminum surfaces grafted with alkyl groups are prone to gradual degradation of their hydrophobic and icephobic properties, which is caused by interactions and reactions with both ice and liquid water. This implies that alkyl-group based monolayers on aluminum surfaces are not likely to be durable icephobic coatings unless their durability in contact with ice and/or water is significantly improved