Vignan University

About: Vignan University is a education organization based out in Guntur, Andhra Pradesh, India. It is known for research contribution in the topics: Computer science & Control theory. The organization has 1138 authors who have published 1381 publications receiving 7798 citations.

F, Cl, Br Doped Ge 44 and Al 22 P 22 Nanocages As Anode Electrode Materials of Li, Na, and K ion Batteries

Abstract: In this study, the potential of Ge44 and Al22P22 as anode electrodes of Li-ion, Na-ion, and K-ion batteries were investigated via density functional theory. The effect of halogen doping of Ge44 and Al22P22 on ability of metal-ion battery was examined. Obtained results shown that Al22P22 as anode electrode in metal-ion batteries has higher potential than Ge44. Calculated results shown that K-ion battery has higher cell voltage and higher performance than Li-ion and Na-ion batteries. Results display that halogen doping increase the cell voltage and performance of studied metal-ion batteries. Calculated results indicated that F‑doped metal-ion batteries have higher cell voltage and higher performance than Cl- and Br-doped metal-ion batteries. Finally it can be concluded that F-doped Al21P22 as anode electrode in K-ion battery has the highest performance.

IgY antibodies of chicken do not bind staphylococcal binder of immunoglobulin (Sbi) from Staphylococcus aureus

Abstract: The immunoglobulin (Ig) binding proteins of Staphylococcus aureus namely staphylococcal protein A (SpA) and staphylococcal binder of immunoglobulin (Sbi) are responsible for false positives during immunoassays. Avian IgY antibodies were reported to have no affinity to SpA and thus are safe for use in immunoassays. However, the behaviour of Sbi with IgY was not reported. The purpose of the present study is to evaluate the interactions between IgY antibodies and Sbi protein from different S. aureus strains. Initially, heterologous cloning and expression of complete sbi gene in Escherichia coli was undertaken. Recombinant Sbi protein was utilized to generate polyclonal anti-Sbi IgY and anti-Sbi antibodies in chicken and BALB/c mice respectively. Indirect ELISA and Western blotting were performed to evaluate the reactivity of anti-Sbi antibodies. Non-reducing PAGE followed by Western blotting and double-antibody sandwich dot-ELISA were performed to analyze the reactivity of IgY antibodies with recombinant Sbi and native Sbi from S. aureus strains. To avoid the possible interference of enzyme-conjugated secondary antibodies from mammalian sources, mouse anti-Sbi revealing antibodies were labeled with biotin so that streptavidin-HRP was used as developing reagent for chromogenic reaction. Sbi was highly immunogenic in chicken and mouse with antibody titers of 1:128,000 and 1:64,000 dilutions respectively. We observed that unimmunized IgY antibodies showed no affinity to either recombinant Sbi or native Sbi from S. aureus strains in Western blotting and double antibody sandwich ELISA. In view of these observations, we recommend that IgY antibodies are safe and free from false positives due to SpA and Sbi in immunoassays involving detection of S. aureus antigens/exotoxins.

Single lead EEG acquisition system for health care applications

Abstract: It is very much difficult to call the patient every time to have EEG test, when a physician wants to examine the outcome of the diagnosis. Currently, there are many data acquisition schemes for monitoring the signals from the psyche and designed to perform EEG in the Recording Room. But, this system extends a design of portable circuitry for rapid and convenient use in health care. High gain precision instrumentation amplifier is designed in hardware and that the output is connected to the analog input of NI myDAQ which is interfaced via USB to computer. Filters are coded in NI Labview and applied to the signal to have smooth analysis. This system can amplify signals more and better noise eliminating options compared to other commercial EEG data acquisition systems. Portable Single lead EEG system is very much used to observe patients suffering from brain damage or any injuries in the brain at home or in the conveyance.

Public Datasets and Techniques for Segmentation of Anatomical Structures from Chest X-Rays: Comparitive Study, Current Trends and Future Directions

Abstract: Segmentation of anatomical structures from chest x ray has an increasing importance in the past four decades and researchers have proposed various techniques and evaluated them using different datasets. In order to evaluate and compare a proposed technique, it is necessary to have knowledge about public datasets available. In this survey, properties and characteristics of different public chest x ray datasets available for segmentation of anatomical structures are studied. Different approaches for segmentation of anatomical structures (lung, heart, clavicles) are summarized. Segmentation techniques for each anatomical structure for a given dataset are compared and analyzed. The paper outlines the issues where further research can be focused.

Wireless solution for polyhouse cultivation using embedded system

Abstract: In this paper the controlling mechanism for monitoring the environmental factors inside a polyhouse is proposed. By using this technique the ambient temperature and humidity can be controlled. These two factors are crucial for the plant growth inside a polyhouse. The prototype is designed by using AT89S52 microcontroller and tested successfully. The system can provide ideal temperature and humidity values as required for the proper growth of the plant. Using the GSM module the farmer can check the temperature inside the polyhouse from a remote location and based on the preloaded temperature values the motors and fans provide sufficient cooling and humidity inside the polyhouse. The advantage of this system lies in reducing the human effort by automation which further provides suitable environment inside the polyhouse. The installation cost is considerably less for the proposed system. For monitoring temperature inside the polyhouse LM35 temperature sensor is used because of its accuracy and fast transmission of data. SY-HS-220 humidity sensor is used for monitoring the humidity inside the polyhouse. These two sensors are integrated with the microcontroller through MCP3208Analog to digital converter. Whenever the temperature and humidity inside the polyhouse increases beyond 25°C, the motor and the fan are turned on automatically to cool the temperature, which are connected to the microcontroller by L293D. The same information about the status of temperature, humidity and motors is transmitted to the farmer and PC node through GSM Module via MAX232. Keil uVision4 cross compiler has been used for implementing the proposed system.