In the present work solid and hollow ZnO nanofibers were fabricated through a facile single capillary electrospinning. The prepared samples were characterized for their structure and phase through X-ray diffraction (XRD), for identification of functional groups using Fourier transform infrared spectroscopy (FT-IR) spectra, elemental identification from EDAX , surface morphology using Fourier transform infrared spectroscopy (FT-IR) spectra and optical property using photoluminescence (PL).
Keywords: Hollow nanofibers, single capillary electrospinning, photoluminescence
Hybrid natural fiber composite material is processed by hand layup method. Among large number of natural fibers, banana and sisal fibers are used as reinforcement in unsaturated polyester matrix along with suitable accelerator and catalyst. Rice husk is selected as filler and incorporated along matrix. The natural fiber composite material is fabricated in three types such as (1) banana fiber/rice husk/polyester, (2) sisal fiber/rice husk/polyester and (3) banana/sisal/rice husk/ polyester. Mechanical behaviour of composite material is evaluated by means of tensile, flexural and impact properties. The result shows that composite material with hybridization of sisal/banana/rice husk/polyester matrix provides enhanced tensile, flexural and impact properties compared to individual fiber reinforced polymer composites. The maximum mechanical behaviour was achieved through the hybridization of natural fibers in polymer matrix composites.
Keywords: Polymer composite, natural fiber, sisal, banana, polyester, rise husk, mechanical properties
Telemedicine is an application where medical information is transferred through mobile or internet for the purpose of consultation and medical examination. This paper elaborates the methodology adopted for various design aspects to be considered for making telemedicine in patient monitoring system. In this method, the patient’s EMG, blood pressure, glucose rate, bilirubin rate are captured and the values are stored into the database and uploaded in the web server and sent to doctor’s mobile using Android technology. This method enables the doctor to send feedback to the nurse.
Keywords: Medical, noninvasive glucose analysis, noninvasive bilirubin analysis, IOT medical
The rapid growth in today’s construction industry has obliged the civil engineers in searching for more efficient and durable alternatives far beyond the limitations of the conventional brick production. Several studies conducted to use the sludge into making of building materials. The sewage treatment plant (STP) sludge is extremely close to the brick clay in chemical composition. The study made with an attempt of experimental investigation of reusing the waste products like STP sludge by making suitable bricks for building construction. It gives a solution for disposal of sludge into open land without legal permission that increases pollution load and also reduces the problems like cost expenditure involves in handling the waste management and its effect on environment. The overall objective is to incorporate the huge quantity of STP sludge generated in the sewage treatment plant located at SRM University campus. The characteristics of the sludge have been studied to suit the replacement of clay/silt combination in making of bricks with the major factors like temperature resistance and water absorption without compromising the strength of the bricks. The mix proportion with corresponding percentage of sludge content as a replacement in making the good product bricks at the range of 10 to 30% of mass for a 13 to 15% optimum moisture content prepared in the mixture and burning at 950°C for 6 hrs. It was observed that 10% of sludge content in the sludge-clay bricks results high compressive strength when compared to conventional clay bricks. It was concluded that the stabilized sludge can be utilized as brick material without affecting the prescribed strength by controlling the operating conditions. Further, the study concluded optimum utilization of sludge as an additive to sludge-clay bricks as one of the available disposal options for SRM University sewage treatment plant.
Keywords: Sewage treatment plant, sludge, waste management, characteristics of sewage, brick production
The problem of disposing and managing solid waste materials in all countries has become one of the major environmental, economical, and social issues. Large quantity of paper waste generated from different countries all over the world causes several serious environmental problems. Conventionally used clay bricks also pose serious threat to environment and an alternate to it needs to be researched and developed. The purpose of this project is to evaluate the possibility of using waste paper as an alternative building construction material to provide low-cost, light weight and environmental friendly bricks. Papercrete bricks of dimension 230 mm × 110 mm × 80 mm were prepared out of waste paper, and quarry dust with partial replacement of cement by fly ash in varying proportions of 25%, 40% and 55% and after 28 days of air curing and sun drying they were tested for the properties like mechanical strength, standard quality comparisons with the conventional bricks through standard tests like hardness, soundness, fire resistance and cost-benefit analysis. Based on the study it was found that papercrete bricks are best suited for non-load bearing walls and also using them in a building, can reduce the from 20% to 50%.
Keywords: Concrete, waste paper, cement, papercrete
A mathematical modelling due to the impact of chemical reaction and heat generation on unsteady natural convective flow and mass transfer over a non compressible syrupy fluid over a vertical inclined plate with non-uniform surface concentration and temperature are considered here. The momentum, concentration and temperature portfolios has been discussed for an assortment of parameters viz., chemical reaction parameter λ, heat generation parameter Δ, Schmidt number Sc , Prandtl number Pr , buoyancy ratio parameter N, exponents in power law variations for surface temperature and concentration n, and m respectively.Read more
The field of neural intelligence has been an area of research in the medical field for decades for the study of different brain diseases. The study of brain signals also cuts across the cooperation of brain signals into brain- computer and brain machine- interface systems and the use of brain signals for the control of our devices. In spite of the wide attention in medical applications, the area of Brain-Computer Interface (BCI) has been focused principally in its application in neuroprosthetics with the aim to restore impaired vision, auditory functions, and movements. Close at hand, are several challenges which need to be correctly addressed. The use of invasive and partially invasive interface approach for BCI systems which involves surgeries and incisions resulting in scar tissue as well as the acquisition of weaker signals when the body react with external objects has been an existing challenge. In this paper, a consideration of those issues is made, which represent a non-invasive BCI called Electroencephalography (EEG) which measures the brain signals detected from electrodes placed on the scalp in a noninvasive way, and the combination of blinks, attention and meditation signals acquired for control of a robotic module.
Keywords: EEG, BCI, non-invasive, invasive, partially invasive
Hydroxyapatite (HA) is a bioceramic, which is present in human and animal bones. It has wide range of medical application for bone infections. The usage of novel drug delivery system for antibiotics is very important for treatment and prevention of bone infection. It is because of the lack of circulation of blood in the infected tissue which makes it difficult to have sufficient supply of antibiotics to reach the adequate therapeutic level in the affected region. To enhance the treatment, we have prepared hydroxyapatite/polyvinyl alcohol/sodium alginate/amoxicillin composite, using wet chemical method. The prepared composites were analysed by various physico-chemical methods. Hydroxyapatite nanoparticles were prepared and characterized by XRD, FTIR, TEM and Raman spectroscopy. Nano composite prepared by wet chemical method and is characterised by FTIR and SEM. This work reports the synthesis of nano composite for controlled release of drugs.
Keywords: Hydroxyapatite, drug delivery, amoxicillin, sodium alginate, antibacterial studies
Curcumin, 1,7-bis-(4-hydroxy-3-methoxyphenyl)-1,6- heptadiene-2,5-dione is a yellow coloured principle phenolic pigment obtained from turmeric, the powdered rhizome of Curcuma longa Linn. (Family: Zingiberaceae). It has effective therapeutic properties not only as an anti-inflammatory drug, but also as a chemo-preventive, chemotherapeutic, antioxidant. One of the most important factors considered to be responsible for all the activity of curcumin is its ability to scavenge reactive oxygen and nitrogen free radicals. Titanium dioxide (TiO2) nano particles are prepared. It is characterized by XRD, FTIR, TEM and Raman spectroscopy methods. TiO2/ PVA/sodium alginate nano composite was prepared by gel casting method. Curcumin was incorporated in the gel. This nano composite was characterized by SEM and FTIR. Our results suggest that this could be an ideal biomaterial for wound dressing applications.
Keywords: Titanium dioxide, wound healing, curcumin, antibacterial activity
With the advancements of pervasive wireless technologies lead to the cloud access using smart devices these days. Even though smart devices provide the way of improvised BIG data handling in mobile clouds, it also yields some of the valuable performance oriented security penalties of confidentiality, privacy, key exchange management, key revocation and risk mitigation’s of access control granularity. Henceforth it is essential to come up with an on-demand, pervasive, fine grained access control framework for mobile clouds. We propose a new device-based ABE framework for achieving best performance mobile cloud computing with higher scalability. On implementing the device-based ABE encryption process, we verify that the block size is not affected and the encryption time difference with and without device attributes is same immaterial of block size.
Keywords: Mobile cloud computing, security, ABE, device based encryption