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A Study on the Role of Accommodation for the Promotion of Domestic Tourism in Tamilnadu
( K. Karthick ),( M. K. Ganesh ) 한국문화관광학회 2018 문화관광연구 Vol.20 No.2
At present, tourism in Tamil Nadu is capable of attracting more tourists in its folds particularly in respect of attracting domestic tourists. The above picture is highly apparent from viewpoints of the local people, domestic tourists and accommodation providers. In Tamil Nadu, participation in tourism-related activities is seen to be more among local people as well as among hoteliers. Most of the hoteliers in various regions of tourism importance under study provide most of the facilities required for tourists’ less than one roof. That is, they provide facilities such as restaurant, car rentals, laundry and doctors on call for tourists
K. Karthick,S. Malarvizhi,V. Balasubramanian,S.A. Krishnan,G. Sasikala,Shaju K. Albert 한국원자력학회 2018 Nuclear Engineering and Technology Vol.50 No.1
Modified 9Cr-1Mo ferritic steel is a preferred material for steam generators in nuclear power plants fortheir creep strength and good corrosion resistance. Austenitic stainless steels, such as type 316LN, areused in the high temperature segments such as reactor pressure vessels and primary piping systems. So,the dissimilar joints between these materials are inevitable. In this investigation, dissimilar joints werefabricated by the Shielded Metal Arc Welding (SMAW) process with Inconel 82/182 filler metals. Thenotch tensile properties and Charpy V-notch impact toughness properties of various regions of dissimilarmetal weld joints (DMWJs) were evaluated as per the standards. The microhardness distribution acrossthe DMWJs was recorded. Microstructural features of different regions were characterized by optical andscanning electron microscopy. Inhomogeneous notch tensile properties were observed across theDMWJs. Impact toughness values of various regions of the DMWJs were slightly higher than the prescribedvalue. Formation of a carbon-enriched hard zone at the interface between the ferritic steel andthe buttering material enhanced the notch tensile properties of the heat-affected-zone (HAZ) of P91. Thecomplex microstructure developed at the interfaces of the DMWJs was the reason for inhomogeneousmechanical properties
Karthick Raj Mani,Sagar Upadhayay,K. J. Maria Das 대한방사선종양학회 2017 Radiation Oncology Journal Vol.35 No.1
Purpose: To Study the dosimetric advantage of the Jaw tracking technique in intensity-modulated radiotherapy (IMRT) and volumetric-modulated arc therapy (VMAT) for Head and Neck Cancers. Materials and Methods: We retrospectively selected 10 previously treated head and neck cancer patients stage (T1/T2, N1, M0) in this study. All the patients were planned for IMRT and VMAT with simultaneous integrated boost technique. IMRT and VMAT plans were performed with jaw tracking (JT) and with static jaw (SJ) technique by keeping the same constraints and priorities for a particular patient. Target conformity, dose to the critical structures and low dose volumes were recorded and analyzed for IMRT and VMAT plans with and without JT for all the patients. Results: The conformity index average of all patients followed by standard deviation (x¯ ± σx¯ ) of the JT-IMRT, SJ-IMRT, JT-VMAT, and SJ-VMAT were 1.72 ± 0.56, 1.67 ± 0.57, 1.83 ± 0.65, and 1.85 ± 0.64, and homogeneity index were 0.059 ± 0.05, 0.064 ± 0.05, 0.064 ± 0.04, and 0.064 ± 0.05. JT-IMRT shows significant mean reduction in right parotid and left parotid shows of 7.64% (p < 0.001) and 7.45% (p < 0.001) compare to SJ-IMRT. JT-IMRT plans also shows considerable dose reduction to thyroid, inferior constrictors, spinal cord and brainstem compared to the SJ-IMRT plans. Conclusion: Significant dose reductions were observed for critical structure in the JT-IMRT compared to SJ-IMRT technique. In JTVMAT plans dose reduction to the critical structure were not significant compared to the SJ-IMRT due to relatively lesser monitor units.
K. Yuvaraj,M. Sakthivel,M. Dhivakar Karthick,T. Pradeep,M. Veerapathran,S. Gowtham 한양대학교 청정에너지연구소 2024 Journal of Ceramic Processing Research Vol.25 No.2
An attempt was undertaken to elevate the efficacy of Engineered Cementitious Composites (ECC) mixes by inclusion ofsilica fume alongside mono fiber and hybrid fiber in this study. Totally, six mixes were prepared with low modulus and highmodulus fiber. The initial three mixtures consist of mono fiber engineered cementitious composites (MFECC), incorporatingPoly Vinyl Alcohol (PVA), Polypropylene (PP), and Glass fiber, each with a 2% volume fraction. The remaining three mixtureswere formulated as hybrid fiber engineered cementitious composites (HFECC), combining PVA (1%) and PP (1%), PP (1%)and Glass (1%), and lastly, PVA (1%) and Glass (1%). In addition, all six mixtures were consistently maintained with a fixedcomposition comprising 40% silica fume, 30% fly ash, 80% M-sand, a water-to-binder ratio of 0.35, and 1% superplasticizer. The findings suggest that within the examined compositions, MFECC reinforced with 2.0% PVA fiber and HFECC reinforcedwith 1% PVA fiber and 1% glass fiber exhibit more significant strength characteristics than other mixtures.
Mani, Karthick Raj,Upadhayay, Sagar,Das, K.J. Maria The Korean Society for Radiation Oncology 2017 Radiation Oncology Journal Vol.35 No.1
Purpose: To Study the dosimetric advantage of the Jaw tracking technique in intensity-modulated radiotherapy (IMRT) and volumetric-modulated arc therapy (VMAT) for Head and Neck Cancers. Materials and Methods: We retrospectively selected 10 previously treated head and neck cancer patients stage (T1/T2, N1, M0) in this study. All the patients were planned for IMRT and VMAT with simultaneous integrated boost technique. IMRT and VMAT plans were performed with jaw tracking (JT) and with static jaw (SJ) technique by keeping the same constraints and priorities for a particular patient. Target conformity, dose to the critical structures and low dose volumes were recorded and analyzed for IMRT and VMAT plans with and without JT for all the patients. Results: The conformity index average of all patients followed by standard deviation (${\bar{x}}{\pm}{\sigma}_{\bar{x}}$) of the JT-IMRT, SJ-IMRT, JT-VMAT, and SJ-VMAT were $1.72{\pm}0.56$, $1.67{\pm}0.57$, $1.83{\pm}0.65$, and $1.85{\pm}0.64$, and homogeneity index were $0.059{\pm}0.05$, $0.064{\pm}0.05$, $0.064{\pm}0.04$, and $0.064{\pm}0.05$. JT-IMRT shows significant mean reduction in right parotid and left parotid shows of 7.64% (p < 0.001) and 7.45% (p < 0.001) compare to SJ-IMRT. JT-IMRT plans also shows considerable dose reduction to thyroid, inferior constrictors, spinal cord and brainstem compared to the SJ-IMRT plans. Conclusion: Significant dose reductions were observed for critical structure in the JT-IMRT compared to SJ-IMRT technique. In JT-VMAT plans dose reduction to the critical structure were not significant compared to the SJ-IMRT due to relatively lesser monitor units.
Isopod Parasite Induced Secondary Microbial Infection in Marine Food Fishes
( Ravichandran S ),( K Sivasubramanian ),( P Parasuraman ),( D. Karthick Rajan ),( G. Ramesh Kumar ) 한국어병학회 2016 한국어병학회지 Vol.29 No.1
Isopods are parasitic crustaceans that pose serious threat to fisheries. Several studies have tried to explore the host-pathogen relationship between marine fishes and isopods. The present study aims to understanding the secondary infections in marine fishes pertaining to isopods. To assess the secondary infection in infected fishes, parasite infested and healthy tissues of fishes were collected. The samples were subjected to standard microbiological procedure to identify the presence of pathogenic bacteria and fungi. Our results showed the branchial region had the higher microbial load of non-sporulating cenocytic fungi in infected fishes. Moreover, fungal strains isolated from the parasitic lesion confirmed that the parasitation and body lesion facilitates the entry of several pathogenic microbes at the damaged host tissue. More over the immune regulation of fish fights back by producing minute cysts, trying to encapsulate the growing fungus. But this may eventually lead to systemic infestation and death of the fish.
La-doped ZnO nanoflower as photocatalyst for methylene blue dye degradation under UV irradiation
Hemalatha, P.,Karthick, S. N.,Hemalatha, K. V.,Yi, M.,Kim, H. J.,Alagar, M. Springer Science + Business Media 2016 Journal of materials science Materials in electron Vol.27 No.3
<P>Lanthanum doped ZnO flower-like structured nanoparticles were synthesized through microwave assisted sol-gel technique. X-ray diffraction, scanning electron microscopy, transmission electron microscopy analysis confirmed the size, structural morphology and successful compound formation of the samples. The band gap was calculated from Tauc's plot using UV-Vis spectroscopy data. Lanthanum doped ZnO nanoparticles were used for the photocatalytic degradation of methylene blue dye under UV light irradiation. Compared to pure ZnO sample, La-doped samples exhibited higher photocatalytic dye degradation under UV light irradiation with short time duration. Among the different amounts of dopant, 3 mol% La-doped ZnO nano rods showed the highest degradation with short time UV light irradiation (60 min). Other factors such as particle size, morphology and defects also affect the photocatalytic activity. In our study, the main factor that influence photocatalytic activity is the separation of photo induced electron-hole pair due to defects formation in the sample. The 3 mol% sample has the appropriate electron-hole separation due to defects compared to pure ZnO. The influence of defects on the photocatalytic activity of all samples has been revealed using photoluminescence spectroscopy analysis. Furthermore, the effect of various operational parameters such as photocatalyst quantity, dye concentration and dopant concentrations were also optimized.</P>
Dhandapani, C.,Narayanasamy, R.,Karthick, S.N.,Hemalatha, K.V.,Selvam, S.,Hemalatha, P.,kumar, M. Suresh,Kirupha, S. Dinesh,Kim, Hee-Je Elsevier 2016 OPTIK -STUTTGART- Vol.127 No.22
<P><B>Abstract</B></P> <P>Nanocrystalline ZrO<SUB>2</SUB> and neodymium doped ZrO<SUB>2</SUB> (Nd–ZrO<SUB>2</SUB>) were successfully prepared by a polymer- assisted, sol-gel method and characterized by XRD, SEM, HRTEM, XPS and UV–vis techniques. X-Ray diffraction studies revealed the formation of highly crystalline structures of ZrO<SUB>2</SUB> and (Nd–ZrO<SUB>2</SUB>) samples. SEM images proved the evenly distributed nano - structured, spherically - shaped ZrO<SUB>2</SUB> particles of size 40nm, which was reduced to 20nm, when doped with neodymium. Light absorption properties of the nanoparticles were studied by UV–vis spectrophotometer. Nd - doped ZrO<SUB>2</SUB> was having a band gap of 2.8ev, while that of ZrO<SUB>2</SUB>, was 2.6ev. Thus, Nd substituted ZrO<SUB>2</SUB> effected substantial shifting of the absorption edge of zirconium oxide to red and resulting in the enhancement of visible light absorption The increase in band gap of Nd–ZrO<SUB>2</SUB> was resulted in an increasing light absorbtion tendency of Nd−ZrO<SUB>2</SUB>, which promoted the photocatalytic efficiency of it. XPS results confirmed substitution of Nd in ZrO<SUB>2</SUB>. Photocatalytic results for the degradation of methylene blue had indicated the fact that neodymium substitution dramatically enhanced the catalytic activity of zirconium oxide. This means that the neodymium − substituted zirconium oxide has the highest photocatalytic activity under visible light irradiation.</P>