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Formulation of an alternate concrete mix for concrete filled GFRG panels
Nithya Nandan,R. Renjith 국제구조공학회 2017 Structural Engineering and Mechanics, An Int'l Jou Vol.63 No.2
Glass fiber reinforced gypsum panels (GFRG) are hollow panels made from modified gypsum plaster and reinforced with chopped glass fibers. The hollow cores of panels can be filled with in-situ concrete/reinforced concrete or insulation material to increase the structural strength or the thermal insulation, respectively. GFRG panels are unfilled when used as partition walls. As load bearing walls, the panels are filled with M 20 grade concrete (reinforced concrete filling) in order to resist the gravity and lateral loads. The study was conducted in two stages: First stage involves formulation of the alternate light weight mix by conducting experimental investigations to obtain the optimum combination of phosphogypsum and shredded thermocol. In the second stage the alternate mixes are filled in GFRG panels and experimental investigations are conducted to compare the performance against panels filled with conventional M 20 mix.
Nithya Mahendran,Keerthi Praveen 한국공업화학회 2021 Journal of Industrial and Engineering Chemistry Vol.100 No.-
A novel BiPO4/NH2-MIL-53(Fe) composite was synthesized through solvothermal method. Photocatalyticperformances of the synthesized composites were evaluated by removal of tetracycline hydrochloride(TCH) and Indigo Carmine (IC) pollutants under visible light irradiation. It was revealed that BiPO4/NH2-MIL-53(Fe) composites displayed better photocatalytic performance than pure BiPO4 and NH2-MIL-53(Fe) catalysts individually. Among the composites optimal ratio is 3:1 of BiPO4/NH2-MIL-53(Fe) (BPM-1)exhibits the highest photocatalytic activity which is 80% and 94% removal of TCH and IC within 2 h. Theenhancement in the photocatalytic activity is because of the more efficient visible light absorption andeffective charge separation that makes the photo degradation process easier. The electrochemicalimpedance results of BPM-1 substantiated the reduction in there combination of electron–hole pairs incomparison to the bare materials. The composite also showed better catalytic reduction efficiency for 4-nitrophenol reduction. Recyclability test validates the better photochemical stability and reusability ofBPM-1. This work will provide a new path to design and fabricate composite photocatalysts based on themetal organic framework for various pollutants degradation and reduction applications.
Assisting children with special needs
( Nithya Maheswaran ) 대구대학교 한국특수교육문제연구소 2018 한국특수교육문제연구소 학술대회발표자료집 Vol.2018 No.1
When considering assisting children with special needs, there are several important factors that need to be attended to, in order to have a successful impact on the child’s progress. When considering a controlled environment such as a school, the importance of thorough assessment of the child should be emphasized. Every child has unique needs and it is our role as an educator to be able to identify the specific needs and be able to incorporate that within the plan of study and training that the child will receive. Likewise, parental training is something that has equal impact on the child’s progress and is often a common subject that is overlooked by several educators. It is crucial to realize that the child spends more than 75% of the day away from school, and therefore in order to be able to see visible progress, the child should be constantly exposed to a learning environment. I will be discussing both these factors in detail using case studies from my institution, and will attempt to highlight the importance of thorough assessment and parental training when considering the education of a special child.
Sathiandran Nithya,Vineesh P.J.,Thomas Sabu K. 한국응용곤충학회 2021 Journal of Asia-Pacific Entomology Vol.24 No.3
First quantitative dung beetle-feeding trophic network analysis for the Oriental region is carried out by inves tigating trophic network interaction between dung beetles and mammal dung types in the moist forests of the Western Ghats a global biodiversity hot spot in south-western India. Dung-beetle assemblage associated with the dung of the prominent mammals, such as the macaque, boar, gaur, elephant and deer, showed differences in richness, abundance and composition among different dung types. Most dung beetles were generalists with low resource specificity and community-wide generalist feeding on herbivore and omnivore dung types. Dung beetles in the region displayed high species richness and abundance in boar dung. The high attraction and specificity of dung beetles towards the odoriferous boar dung indicate that the omnivore mammal Sus scrofa has a major role in maintaining the dung beetle community in the forests of the Western Ghats. Network interaction analysis shows that the vast majority in the assemblage are generalist species, and the few specialist species were all with low abundance. Low overall specialisation and low resource partitioning with high species richness is recorded in the assemblage. The assemblage’s trophic level preference is reflected in the high dung specificity recorded in the omnivore and herbivore dung types.
Sadhu, Nithya Lavanya,Teegala, Bramhananda Reddy,Marapu, Vijay Kumar The Korean Institute of Power Electronics 2020 JOURNAL OF POWER ELECTRONICS Vol.20 No.6
High amounts of harmonics cause noise and electromagnetic interference to nearby systems. Pulsewidth modulation (PWM) techniques are used to reduce the amount of harmonics near the multiples of switching frequencies. To trim down the noise and electromagnetic interference and improve the quality of the output voltages, different types of constant and variable switching frequency random PWM techniques for dual inverter-fed open-end winding induction motor drive configuration are discussed in this study. Moreover, the vector control technique is used along with random PWM techniques to improve the transient response of the dual inverter.
Venkatesan Nithya,Rathinasamy Sakthivel,Faris Alzahrani,마용기 제어·로봇·시스템학회 2019 International Journal of Control, Automation, and Vol.17 No.11
This paper investigates the problem of robust decentralized fault-tolerant resilient control for fractionalorder large-scale interconnected uncertain system, and the problem considered here is subject to mixed H∞ and passivity performance constraint, external disturbances, controller perturbations and control input saturation. Based on the Lyapunov approach, the sufficient conditions are derived in terms of linear matrix inequalities to ensure the asymptotic stabilization of the fractional-order large-scale system with a prespecified mixed H∞ and passivity performance index. The main objective of this work is to design a robust decentralized fault-tolerant resilient controller which compensates both actuator fault and input saturation in its design for obtaining the required result. Finally, a numerical example is included to illustrate the effectiveness of the designed control law. The simulation results reveal that our proposed controller not only can effectively deal with actuator faults, but also has very good robustness for input saturation and external disturbances.
Kadirvel Nithya,Balasubramaniam Parameswari,Rasappa Viswanathan 한국식물병리학회 2020 Plant Pathology Journal Vol.36 No.4
Sugarcane is an important sugar crop contributes more than 80% of world sugar production. Mosaic, leaf fleck, and yellow leaf (YL) are the major viral diseases af- fecting sugarcane, amongst YL occurrence is widely reported in all the sugarcane growing countries. It is caused by Sugarcane yellow leaf virus (SCYLV) and detailed works were done on complete genome charac- terization, transmission, and management. However, in countries like Egypt, South Africa, Cuba, Mauritius and Hawaii, the disease was reported to the cause of sugarcane yellow leaf phytoplasma (SCYP) and/or SCYLV as single/combined infections. Hence, we have investigated in detail to identify the exact Candidatus phytoplasma taxon associated in Indian cultivars affected with YL. The sequencing results and the restric- tion fragment length polymorphism pattern of the PCR products using the universal phytoplasma primers confirmed presence of sugarcane grassy shoot (SCGS) phytoplasma (16SrXI group) in the YL-affected plants. Mixed infection of SCYLV and SCGS phytoplasma was estimated as 32.8% in YL affected plants. Evolutionary genetic relationship between SCYP and SCGS phyto- plasma representatively taken from different countries showed that SCYP from South Africa and Cuba were diverged from others and had a highest similarity with SCGS phytoplasma. Although we wanted to identify SCYP from YL affected Indian sugarcane cultivars, the study clearly indicated a clear absence of SCYP in YL affected plants and we found SCYLV as the primary cause for the disease.
A Survey on Detection and Prevention of Cross-Site Scripting Attack
V. Nithya,S. Lakshmana Pandian,C. Malarvizhi 보안공학연구지원센터 2015 International Journal of Security and Its Applicat Vol.9 No.3
In present-day time, securing the web application against hacking is a big challenge. One of the common types of hacking technique to attack the web application is Cross-Site Scripting (XSS). Cross-Site Scripting (XSS) vulnerabilities are being exploited by the attackers to steal web browser’s resources such as cookies, credentials etc. by injecting the malicious JavaScript code on the victim’s web applications. Since Web browsers support the execution of commands embedded in Web pages to enable dynamic Web pages attackers can make use of this feature to enforce the execution of malicious code in a user’s Web browser. The analysis of detection and prevention of Cross-Site Scripting (XSS) help to avoid this type of attack. We describe a technique to detect and prevent this kind of manipulation and hence eliminate Cross-Site Scripting attack.