104 results on '"Karuna, Kumari"'
Search Results
2. O-SegNet: Robust Encoder and Decoder Architecture for Objects Segmentation From Aerial Imagery Data.
- Author
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Karuna Kumari Eerapu, Shyam Lal, and A. V. Narasimhadhan
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- 2022
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3. A rapid and novel quantitative determination of Lecanemab monoclonal antibody for Alzheimer's disease using reverse phase ultra performance liquid chromatography.
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Neeladhri, Karuna Kumari, Sailaja, B.B.V., and Pallapati, Suman
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ALZHEIMER'S disease ,LECANEMAB ,MONOCLONAL antibodies ,LIQUID chromatography ,DETECTION limit ,FORMIC acid - Abstract
A novel humanized IgG1 monoclonal antibody known as Lecanemab is used to treat Alzheimer's disease. Utilizing the RP-UPLC technique, the current investigation aims to develop a robust, stable and rapid method for determining Lecanemab. By applying this method, the ultimate chromatographic conditions were obtained using a BEH C8 (1.7 μm, 2.1 x 100 mm) and a mobile phase prepared with acetonitrile and formic acid buffer in a 7: 3 ratio, respectively (1.0 mL of formic acid diluted in 1 liter of HPLC-grade water), by means of adopting isocratic elution. Detection limit (LOD) and quantitation limit (LOQ) were 0.30 and 1.00 μg/mL, respectively, and linearity (R
2 = 0.999) was demonstrated in the range of 25-150 μg/mL of working concentration with PDA detection at 219 nm. The results of the forced degradation investigation also make it evidently visible; the drug's degradation products could be separated from the main peak, assuring the effectiveness of the stability-indicating method. Thus, routine analysis and stability studies favor of enormously from the use of this method of analysis. [ABSTRACT FROM AUTHOR]- Published
- 2024
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4. Assessment of bioactive compounds, antioxidant potential, and enzymatic activity in different guava (Psidium guajava) cultivars
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Kumari, Priyanka, primary, Mankar, Abhay, additional, Karuna, Kumari, additional, Homa, Fozia, additional, Ilahy, Riadh, additional, and Siddiqui, Mohammed Wasim, additional
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- 2024
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5. Proliferative Verrucous Leukoplakia Revisited: A Retrospective Clinicopathological Study
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Snehashish Ghosh, Roopa S. Rao, Manoj K. Upadhyay, Karuna Kumari, D. Sharathkumar Sanketh, A. Thirumal Raj, Sameena Parveen, Yaser Ali Alhazmi, Ankur Jethlia, Shazia Mushtaq, Sachin Sarode, Rodolfo Reda, Shankargouda Patil, and Luca Testarelli
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leukoplakia ,oral disease ,oral pathology ,proliferative verrucous leukoplakia ,Medicine (General) ,R5-920 - Abstract
(1) Objective: To review the criteria proposed by Cerero-Lapiedra et al. and to retrospectively identify the under-diagnosed disease in patients diagnosed with proliferative verrucous leukoplakia. (2) Materials and methods: In this study, we included patients who were diagnosed with leukoplakia (histological label consistent with the clinical diagnosis, n = 95), and cases with a final diagnosis within the spectrum of proliferative verrucous leukoplakia (n = 110) as defined by Batsakis et al. We applied the criteria proposed by Cerero-Lepiedra et al. to screen for the possible cases of proliferative verrucous leukoplakia. (3) Results: Although many of our patients satisfied specific isolated criteria, only 11 cases satisfied specific combinations of the guidelines to satisfy a diagnosis of proliferative verrucous leukoplakia. However, due to the lack of follow-up data, the disease is not confirmed in these 11 cases. (4) Conclusion: A limited number of cases of proliferative verrucous leukoplakia were diagnosed using the criteria given by Cerero-Lapiedra et al. The true natural history of the disease could not be studied due to the lack of follow-up data. (5) Clinical relevance: Proliferative verrucous leukoplakia presenting as hyperkeratosis or mild epithelial dysplasia are often not followed up, and they subsequently transform into carcinoma. Thus, clinicians must be vigilant whenever they encounter leukoplakia, especially with multifocal presentations. In such cases, the follow-up data are the key to understanding the true nature of the disease entity.
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- 2021
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6. Dense Refinement Residual Network for Road Extraction From Aerial Imagery Data.
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Karuna Kumari Eerapu, Balraj Ashwath, Shyam Lal, Fabio Dell'Acqua, and A. V. Narasimhadhan
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- 2019
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7. A robust framework for quality enhancement of aerial remote sensing images
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Karuna Kumari, Eerapu, Das, Devikalyan, Suresh, Shilpa, Lal, Shyam, and Narasimhadhan, A.V.
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- 2018
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8. A Comprehensive Study on Mass Culture of Gracilaria edulis in Coastal Waters of South Andaman: Criterion, Constraints and Possibilities
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Karuna Kumari R, Vinithkumar N. V., and Dharani G
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Aquatic Science ,Oceanography - Published
- 2022
9. Review on Dissolved Organic Carbon and Particulate Organic Carbon in Marine Environment
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Radha Karuna Kumari and P. M. Mohan
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Oceanography ,GC1-1581 ,Biology (General) ,QH301-705.5 - Abstract
Quantification the Dissolved and Particulate organic carbon in marine waters is an essential step towards ecosystem modeling and understanding carbon sequestration processes. A detailed view of estimated and recorded carbon concentration from Arctic to Antarctic is the prime goal of this review. This review compiles some of the important research work carried out in quantifying the organic carbon available in off shore and open waters and in coral reef environment. The cited literatures were collected, grouped and carefully analyzed to give a comprehensive view on current status of marine environment with regard to distribution of dissolved and particulate organic carbon. Keywords: DOC, POC, continental shelf waters, open sea waters, coral reef environment.
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- 2018
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10. Effect of Pre-harvest Salicylic Acid Spray on Shelf Life and Biochemical Changes of Litchi during Storage
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Kumari, Priti, primary, Kumar, Pawan, additional, Karuna, Kumari, additional, Aftab, Ahmar, additional, Kumar, Anand, additional, and Ahmad, Feza, additional
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- 2023
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11. Effect of Different Levels of Irrigation on Plant Growth and Yield of Mango cv. Langra
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Kumari, Suman, primary, Kumar, Ravindra, additional, Singh, Yanendra Kumar, additional, Karuna, Kumari, additional, Kumar, Saurav, additional, Rai, Ankur Kumar, additional, Kumar, Roopendra, additional, Madhumala, Kumari, additional, Nandita, Kumari, additional, and Kumar, Raushan, additional
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- 2023
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12. Role of an oxide interface in a resistive switch
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S. J. Ray, Ajay D. Thakur, Karuna Kumari, and Subhasmita Kar
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Resistive touchscreen ,Materials science ,business.industry ,Process (computing) ,Oxide ,General Physics and Astronomy ,Memristor ,Resistive random-access memory ,law.invention ,Active layer ,chemistry.chemical_compound ,chemistry ,law ,Optoelectronics ,General Materials Science ,business ,Layer (electronics) ,Electronic circuit - Abstract
In the present era of data-driven architectures like 5G, Internet of things (IoT), Artificial Intelligence (AI), etc, the requirement of fast-switchable memory storage is more than ever. Oxide resistive switches are considered to be a primary choice in the non-volatile memory design. In this work, we have engineered the conventional metal-insulator-metal (MIM) structure of an oxide memristor (Ag/ZnO/ITO) by inducing an additional oxide layer La0.7Sr0.3MnO3 (LSMO) at the interface between the active layer (ZnO) and Ag electrode. The presence of LSMO acts as a reservoir for the oxygen vacancies, easing the conducting filament formation process in ZnO, thereby enabling drastic improvement of the switching performance and offering reliable endurance over multiple switching cycles. First-principles-based calculations suggested the role of Oxygen vacancies in controlling the electronic state of ZnO and formation of vacancies in the resistive switching process, which is in agreement with the experimental observation. The current results pave ways for improving the switching performance of resistive memory circuits through simple structural engineering incorporation, which lies at the heart of oxide electronics.
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- 2022
13. Contributors
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Abdul Gafoor, V.M., primary, Alappatt, Joju P., additional, Albert Idu, K.A., additional, Ambast, S.K., additional, Angel, J. Raymond Jani, additional, Balasuriya, Abhaya, additional, Biswas, Utpal, additional, Burman, D., additional, Carlos, Guillén, additional, Chandras, Swati, additional, Chattopadhyay, N., additional, Damodaran, V., additional, Das, Apurba Kumar, additional, De, A.K., additional, Dharani, G., additional, Geethalakshmi, V., additional, Gowtham, R., additional, Jaisankar, I., additional, Jerard, B.A., additional, Jeyakumar, S., additional, Kamble, Mayur Y., additional, Kannan, A., additional, Kariyanna, B., additional, Karthick, R., additional, Karuna Kumari, R., additional, Kirubagaran, C.R., additional, Kiruba-Sankar, R., additional, Kripa, V., additional, Kundu, A., additional, Lalljee, B., additional, Linoy Libini, C., additional, Lohith Kumar, K., additional, Mandal, Subhasis, additional, Mane, Santosh S., additional, Manjumol, C.C., additional, Mathai, John, additional, Mohamed, K.S., additional, Mohan, M., additional, Mohan, P.M., additional, Murugan, C., additional, Praveen Raj, J., additional, Rajan, P.T., additional, Raghunathan, Chelladurai, additional, Rahul Kumar, R., additional, Ramaraj, A.P., additional, Ravisankar, N., additional, Roy, S. Dam, additional, Saravanan, K., additional, Sathish, T., additional, Satyam, Kunal, additional, Sharma, T.V.R.S., additional, Singh, Awnindra K., additional, Singh, D.R., additional, Singh, P.K., additional, Singh, R.M., additional, Singh, Shrawan, additional, Sivaperuman, C., additional, Subramani, T., additional, Sujatha, T., additional, Sujathkumar, N.V., additional, Sunder, J., additional, Swarnam, T.P., additional, Thiruchitrambalam, Ganesh, additional, Velmurugan, A., additional, Venkatesan, K., additional, Vinithkumar, N.V., additional, and Zamir Ahmed, S.K., additional
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- 2018
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14. A Comprehensive Study on Mass Culture of Gracilaria edulis in Coastal Waters of South Andaman: Criterion, Constraints and Possibilities
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R, Karuna Kumari, primary, N. V., Vinithkumar, additional, and G, Dharani, additional
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- 2022
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15. Structural, resistive switching and charge transport behaviour of (1-x)La$$_{0.7}$$Sr$$_{0.3}$$MnO$$_3$$.(x)ZnO composite system
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Karuna Kumari, Ajay D. Thakur, and S. J. Ray
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General Materials Science ,General Chemistry - Published
- 2022
16. Raman Microspectrometry: An Alternative Method of Age Estimation from Dentin and Cementum
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Karuna Kumari, Roopa S Rao, Sachin Chakradhar Sarode, Gargi Sachin Sarode, and Shankargouda Patil
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Chronological age ,Forensic dentistry ,Forensic odontology ,Medicine - Abstract
Introduction: Raman spectroscopy is simple, quick, sensitive and non destructive form of tissue examination that provides vital data about the structure, molecular composition and interactions within a sample. The human hard tissues like teeth and bone are able to resist decay for long even after other tissues are lost, thus have valuable forensic importance. Aim: To ascertain the known age of the teeth by analysing dentin and cementum using Raman microspectrometry and assess the accuracy of age estimation by comparison of dentin with cementum. Materials and Methods: The sound permanent extracted tooth specimens (40) of age ranging between 12-74 years were collected and sectioned longitudinally and different dentinal and cemental areas were analysed by Raman microspectrometry. The spectra of dentin and cementum were used as predictors of age estimation. For each sample, ratios were obtained for dentin and cementum areas, and Pearson’s correlation coefficient was calculated. Ratios, which had a correlation coefficient greater than 0.40 were used for further statistical analysis. This led to selection of ratios only for dentin areas, and it allowed us to develop a regression formula. Partial Least Square (PLS) regression method was used for computing our model. Results: A significant correlation was observed between the actual chronological age and predicted age of the individual using dentinal areas of the tooth. A closest to the estimated result was achieved, with an error of three years between predicted and actual chorological age. Conclusion: Raman microspectrometry may be considered as an alternative to the conventional method of age estimation and contribute to the identification of individuals.
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- 2017
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17. First-principles investigation of ferroelectric and piezoelectric properties in one-dimensional transition metal oxytetrahalides
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P. Karuna Kumari and Se Young Park
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- 2022
18. Possible Role of Bcl-2 Expression in Metastatic and Non Metastatic Oral Squamous Cell Carcinoma
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V. Pavithra, Karuna Kumari, Vanishri C. Haragannavar, Roopa S. Rao, Shwetha Nambiar, Dominic Augustine, and S.V. Sowmya
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apoptosis ,metastasis ,neoangiogenesis ,Medicine - Abstract
Introduction: Oral carcinoma is a global health problem. India accounts for one-third of world burden with high prevalence rate of 2.5 million and mortality rate of 5.5 lacs per year. Oral carcinogenesis is a multistage process that frequently involves invasion and metastasis that needs early detection and treatment to improve the overall quality of life. The ability of Oral Squamous Cell Carcinoma (OSCC) to metastasize to lymph nodes does not always show a relationship with clinical staging. A spectrum of molecular mechanisms is involved in carcinogenesis, where defect in the regulation of apoptosis is assumed to contribute to the pathogenesis and progression of cancer. Apoptosis regulatory genes include the antiapoptotic protein such as B-cell lymphoma-2 (Bcl-2) gene that might be used as a molecular marker to evaluate the biological behaviour of oral cancer. Aim: To evaluate and correlate the Bcl-2 expression in OSCC patients with lymphnode metastasis and without metastasis. Materials and Methods: The study comprised of 30 samples, 15 cases of metastatic and 15 non-metastatic primary OSCC. All the cases were stained for routine Hematoxylin and Eosin (H&E), and Bcl-2 antibody by immunohistochemistry. The H&E stained sections were evaluated for Lymphocytic Infiltrate (LI) and Pattern Of Invasion (POI). Bcl-2 stained sections were evaluated for staining intensity and distribution. The differences between the groups were statistically analysed using chi-square test. Results: The histopathological parameters, LI and POI did not show any statistical difference between the study groups. Expression of Bcl-2 in OSCC was 33.3% among the study groups, where metastatic group showed a positive expression of 13.3% and 20% in non-metastatic OSCC that did not show statistically significance among the study groups. Conclusion: There was no significant difference in the expression of Bcl-2 between the study groups. Apoptosis is regulated by interaction among the Bcl-2 gene family. Hence, evaluation of Bcl-2 along with other apoptotic regulating proteins could define the role in pathogenesis and prognosis of metastatic and non-metastatic OSCC.
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- 2017
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19. Basaloid Squamous Cell Carcinoma of Tongue: A Report with Emphasis on Immunohistochemistry
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Karuna Kumari, Vanishree C Haragannavar, K Vineeth Kumar, Kavitha Prasad, and Shwetha Nambiar
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distant metastasis ,human papilloma virus ,proliferative cell nuclear antigen ,Medicine - Abstract
Basaloid Squamous Cell Carcinoma (BScc) is a rare entity with its histopathological distinction from conventional squamous cell carcinoma. It is frequently considered a high-grade carcinoma with poor prognosis because of higher rate of distant metastases. Here by, we are reporting a case of 39-year-old male with an ulcer on the left lateral border of the tongue since a month. Histopathological examination of incisional biopsy revealed basaloid tumour cell islands accompanied by component of well differentiated squamous cell carcinoma. To reconfirm this incidental finding immunohistochemistry was carried out for Proliferative Cell Nuclear Antigen (PCNA) and pancytokeratin (AE1/AE3) which was positive to conclude diagnosis of BScc. Further p16 staining was done to rule out Human Papilloma Virus (HPV) infection.
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- 2017
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20. Resistive switching phenomena: a probe for the tracing of secondary phase in manganite
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Karuna Kumari, S. J. Ray, and Ajay D. Thakur
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General Materials Science ,General Chemistry - Published
- 2022
21. Geochemical characteristics and quality of groundwater evaluation for drinking, irrigation, and industrial purposes from a part of hard rock aquifer of South India
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A. Dinakar, B. Karuna Kumari, M. Sravanthi, and N. Subba Rao
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geography ,Irrigation ,geography.geographical_feature_category ,Soil salinity ,Health, Toxicology and Mutagenesis ,Environmental engineering ,Aquifer ,General Medicine ,010501 environmental sciences ,Type (model theory) ,01 natural sciences ,Pollution ,Rainwater harvesting ,Water environment ,Environmental Chemistry ,Environmental science ,Water quality ,Groundwater ,0105 earth and related environmental sciences - Abstract
The present study is a part of hard rock aquifer of Telangana, South India, where the groundwater is withdrawn heavily for drinking, irrigation, and small-scale industrial purposes. Geochemical characteristics explain the chemical processes, which control the groundwater chemistry and consequently the groundwater quality, while the chemical quality of groundwater is adversely affected by anthropogenic activities, which damage the water environment. The focus of the present study was, thus, to know the origin of geochemical characteristics and also to evaluate the quality of groundwater for various purposes for taking the suitable remedial measures to provide safe water to the local community. Geochemical relations (GR) and hierarchical cluster analysis (HCA) were used to assess the geochemical characteristics. Entropy weighted groundwater quality index (EWGQI), United States Soil Salinity Laboratory Staff (USSLS)’s diagram, and groundwater quality criteria for water supply pipes (GQCW) were used to evaluate the groundwater quality for drinking, irrigation, and industrial purposes, respectively. The study found that the water-rock interactions associated with ion exchange and evaporation were the prime geochemical factors controlling the geochemical characteristics and the anthropogenic activities as the secondary factor. These observations were further supported by HCA. According to the EWGQI, 34.97% of the spatial area was found to have the poor and very poor groundwater quality zones for drinking purpose, because of the dominance of TDS, Na+, Cl−, $$ {\mathrm{SO}}_4^{2-} $$ , $$ {\mathrm{NO}}_3^{-} $$ , and F− contents in the groundwater system. Based on the USSLS’s diagram, 79.55% of the present study area was observed to be poor and very poor water quality type for irrigation utilization due to salinity hazard. The GQCW demonstrated that the 7.91% and 8.82% of the areas were not suitable for industrial purpose due to influence of incrustation based on $$ {\mathrm{HCO}}_3^{-} $$ and $$ {\mathrm{SO}}_4^{2-} $$ , respectively, and 1.85%, 12.32%, and 1.25 of the areas are unfit due to influence of corrosion based on pH, TDS, and Cl−, respectively. Therefore, boiling, activated carbon filter, rainwater harvesting, suitable coatings on metal surfaces of water supply pipes, etc. are the important suggested effective strategic measures to provide safe water for drinking, irrigation, and industrial purposes.
- Published
- 2021
22. O-SegNet: Robust Encoder and Decoder Architecture for Objects Segmentation From Aerial Imagery Data
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Eerapu, Karuna Kumari, primary, Lal, Shyam, additional, and Narasimhadhan, A. V., additional
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- 2022
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23. Seasonal and Spatial Variation of Groundwater Quality Vulnerable Zones of Yellareddygudem Watershed, Nalgonda District, Telangana State, India
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D Karunanidhi, N. Subba Rao, B. Karuna Kumari, A. Dinakar, and T Kamalesh
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Hydrology ,Irrigation ,Watershed ,010504 meteorology & atmospheric sciences ,Health, Toxicology and Mutagenesis ,Weathering ,General Medicine ,Groundwater recharge ,010501 environmental sciences ,Toxicology ,01 natural sciences ,Pollution ,Environmental science ,Spatial variability ,Water quality ,Leaching (agriculture) ,Groundwater ,0105 earth and related environmental sciences - Abstract
Evaluation of seasonal and spatial variations in vulnerable zones for poor groundwater quality is essential for the protection of human health and to maintain the crop yields. With this objective, groundwater samples were collected seasonally (i.e., pre- and post-monsoon) from the Yellareddygudem watershed of Telangana, India. These samples were analysed for major chemical parameters (pH, TDS, Ca2+, Mg2+, Na+, K+, [Formula: see text], Cl-, [Formula: see text], [Formula: see text], and F-). Geographical information system (GIS) tools were used to delineate the seasonal and spatial variations for vulnerable zones related to the drinking groundwater quality index (DGQI) and irrigation groundwater quality index (IGQI). Geochemical facies and relations, Piper diagrams, and principal component analysis indicated that the weathering, dissolution, leaching, ion exchange, and evaporation were the primary processes controlling the groundwater quality seasonally. Human influences were the secondary factors. The TDS, Na+, K+, Cl-, [Formula: see text], and F- parameters were observed to be within the drinking water quality standard limits in most post-monsoon groundwater samples. However, the DGQI showed an increase in the number of samples with unsuitable quality for drinking in the post-monsoon period compared with the pre-monsoon period. The IGQI demonstrated that the number of samples with unsuitable quality for irrigation increased in the post-monsoon period compared to the pre-monsoon period. The differences in the vulnerable zones between the pre- and post-monsoon periods were due to variations in groundwater recharge, following the topography. Thus, the present study will help decision makers to plan groundwater treatment measures within vulnerable zones.
- Published
- 2020
24. Different Effect of Sliding Mode Controller on DC-DC Boost Converter with Output Voltage Variation Analysis
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Karuna Kumari
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Physics ,Control theory ,Voltage variation ,Boost converter ,Mode (statistics) - Published
- 2020
25. A Comprehensive Study on Mass Culture of Gracilaria edulisin Coastal Waters of South Andaman: Criterion, Constraints and Possibilities
- Author
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R, Karuna Kumari, N. V., Vinithkumar, and G, Dharani
- Abstract
This study explores the possibilities of converting the largely underutilized potential coastlines of Andaman Island to profitable seaweed farming sites, particularly at South Andaman. Present study, surveyed a total of five stations to locate the best possible site for seaweed mass production, of which two locations were selected based on geomorphology, water quality parameters and ease of access. The pilot scale study was done from 2018 – 2021 to understand the feasibility of seaweed farming in this Island. The first culture initiation was done at North Bay using Gracilaria edulis(G. edulis)and Acanthophora spicifera(A. spicifera)in floating bamboo raft.Seaweeds were tied using two different methods i.e.direct insertion to ropes and pouch filling.The results suggested that pouch filling method not only increases the yield but also lowers wash out occurrences in rough sea. The G. edulisspecies was found to grow well in the bamboo rafts with DGR of approximately 135 gm (± 0.085gm)/Kg. About 155–180 kg of G.eduliswere harvested from 7 raft seasonally with 17.5 kg of input biomass, in this trial study. The main challenges experienced during the trial were, seasonality of preferable seed material, prolonged rainy seasons, cyclonic events, wave action and turbidity due to sedimentation, fouling by undesirable algae. Even so, the prospects of extensive development of seaweed culture in these islands are high, provided, steady seed availability, selection of season, proper culture technique and practices are considered and applied.
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- 2023
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26. Expression of Ki-67, p53, α-SMA and COX-2 in lichen planus and related lesions: A pilot study
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Gargi S Sarode, Karuna Kumari, D. S. Sanketh, Vanishree C Haragannavar, Roopa S Rao, A. Thirumal Raj, Shankargouda Patil, and Sachin C Sarode
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medicine.medical_specialty ,Epithelial dysplasia ,biology ,business.industry ,030206 dentistry ,medicine.disease ,Dermatology ,Article ,Staining ,stomatognathic diseases ,03 medical and health sciences ,0302 clinical medicine ,stomatognathic system ,Otorhinolaryngology ,Dysplasia ,030220 oncology & carcinogenesis ,Ki-67 ,medicine ,biology.protein ,Immunohistochemistry ,Oral lichen planus ,business ,General Dentistry - Abstract
Background Researchers have struggled to understand the natural history of lesions presenting with both lichenoid features and epithelial dysplasia. Thus the present study was designed to differentiate between OLP, OLP with dysplasia, epithelial dysplasia and epithelial dysplasia with lichenoid features based on the expressions of ki-67, p53, COX-2, and α-SMA. Materials and methods Formalin-fixed paraffin-embedded archival specimens of OLP, OLP with dysplasia, epithelial dysplasia and epithelial dysplasia with lichenoid features were subjected to immunohistochemical staining with ki-67, p53, COX-2, and α-SMA. Results Ki-67 exhibited strong positivity in 100% (6/6) of epithelial dysplasia cases, 71.4% (5/7) of lichenoid dysplasia cases, 57.1% (4/7) of OLP cases and 60% (3/5) of OLP with dysplasia cases. Strong p53 staining was evident in more cases of lichenoid dysplasia [42.8% (3/7)], while moderate staining was more frequent in OLP cases [42.8% (3/7)] and OLP with dysplasia cases [42.8% (3/7)] and mild intensity was more frequent in epithelial dysplasia cases [50% (3/6)] followed by lichenoid dysplasia cases [42.8% (3/7)], OLP cases [28.5 (2/7)] and OLP with dysplasia cases [40% (2/5)]. COX-2 strong positivity was more frequent in cases of epithelial dysplasia cases [57.1% (4/7)] and OLP [50% (3/6)]. Strong α- SMA staining was noted more frequently in lichenoid dysplasia cases [71.4 (5/7)], followed by OLP cases [42.8% (3/7)] and OLP with dysplasia cases [60% (3/5)]. Conclusions Ki-67, p53, α-SMA and COX-2 expression do not differentiate between OLP, LP with dysplasia and epithelial dysplasia with lichenoid features.
- Published
- 2019
27. Dense Refinement Residual Network for Road Extraction From Aerial Imagery Data
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Shyam Lal, Fabio Dell'Acqua, Balraj Ashwath, Karuna Kumari Eerapu, and A. V. Narasimha Dhan
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DRR Net ,010504 meteorology & atmospheric sciences ,General Computer Science ,Computer science ,ComputingMethodologies_IMAGEPROCESSINGANDCOMPUTERVISION ,0211 other engineering and technologies ,02 engineering and technology ,Residual ,dense blocks ,01 natural sciences ,General Materials Science ,Segmentation ,021101 geological & geomatics engineering ,0105 earth and related environmental sciences ,IOU ,Pixel ,business.industry ,General Engineering ,Pattern recognition ,Object (computer science) ,residual connections ,loss function ,Dense convolutions ,Path (graph theory) ,lcsh:Electrical engineering. Electronics. Nuclear engineering ,Artificial intelligence ,business ,lcsh:TK1-9971 ,Encoder ,Feature learning - Abstract
Extraction of roads from high-resolution aerial images with a high degree of accuracy is a prerequisite in various applications. In aerial images, road pixels and background pixels are generally in the ratio of ones-to-tens, which implies a class imbalance problem. Existing semantic segmentation architectures generally do well in road-dominated cases but fail in background-dominated scenarios. This paper proposes a dense refinement residual network (DRR Net) for semantic segmentation of aerial imagery data. The proposed semantic segmentation architecture is composed of multiple DRR modules for the extraction of diversified roads alleviating the class imbalance problem. Each module of the proposed architecture utilizes dense convolutions at various scales only in the encoder for feature learning. Residual connections in each module of the proposed architecture provide the guided learning path by propagating the combined features to subsequent DRR modules. Segmentation maps undergo various levels of refinement based on the number of DRR modules utilized in the architecture. To emphasize more on small object instances, the proposed architecture has been trained with a composite loss function. The qualitative and quantitative results are reported by utilizing the Massachusetts roads dataset. The experimental results report that the proposed architecture provides better results as compared to other recent architectures.
- Published
- 2019
28. Randomly arranged cation-ordered nanoregions in lead-free relaxor ferroelectric K1/2Bi1/2TiO3: Prediction from first-principles study.
- Author
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Niranjan, Manish K., Karuna Kumari, P., Banerjee, Krishnarjun, and Asthana, Saket
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CATIONS , *LEAD-free ceramics , *RELAXOR ferroelectrics , *DENSITY functionals , *LATTICE dynamics , *RAMAN spectra - Abstract
First-principles density functional calculations are performed to investigate the lattice dynamics, Infrared reflectivity, and Raman intensity spectra of a lead-free ferroelectric K1/2Bi1/2TiO3 system. In particular, the A-site cation ordering in K1/2Bi1/2TiO3 and its effects on lattice dynamics and the Raman spectrum are explored. The results suggest that the cation ordering at the A-site in K1/2Bi1/2TiO3 significantly influences its Raman spectra. From the analysis of theoretical and experimental Raman spectra, it is suggested that randomly arranged cation ordered nanoregions with different A-site orderings are formed in K1/2Bi1/2TiO3 samples. The random arrangement is favored by entropy contributions to free energy and may explain the lack of observed long-range A-site cation ordering in K1/2Bi1/2TiO3. Further, it is suggested that partial A-site cation ordering may also occur in K1/2Bi1/2TiO3 favored by kinetic factors during sample preparation. The Born effective charges of K and Bi ions at the A-site are computed and found to be significantly disparate, thereby suggesting hetero-polar activity at the A-site in K1/2Bi1/2TiO3. The formation of A-site hetero-polar cation ordered nanoregions and their random or/and partially ordered arrangement in K1/2Bi1/2TiO3 may play an important role in the determination of its relaxor properties apart from the dominant role played by polar nanoregions. The computed Infrared reflectivity and Raman intensity spectra are expected to provide benchmark first-principles results for further analysis of experimental spectra and results. [ABSTRACT FROM AUTHOR]
- Published
- 2018
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29. Proliferative verrucous leukoplakia revisited: a retrospective clinicopathological study
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Roopa S Rao, A. Thirumal Raj, Shazia Mushtaq, Yaser Ali Alhazmi, Ankur Jethlia, Manoj K. Upadhyay, Sachin C Sarode, Luca Testarelli, Shankargouda Patil, Sameena Parveen, Snehashish Ghosh, Karuna Kumari, Rodolfo Reda, and D. Sharathkumar Sanketh
- Subjects
medicine.medical_specialty ,Medicine (General) ,leukoplakia ,oral disease ,oral pathology ,proliferative verrucous leukoplakia ,Hyperkeratosis ,Disease ,Article ,03 medical and health sciences ,0302 clinical medicine ,R5-920 ,stomatognathic system ,Oral and maxillofacial pathology ,Proliferative verrucous leukoplakia ,Carcinoma ,Medicine ,Clinical significance ,Leukoplakia ,business.industry ,030206 dentistry ,General Medicine ,medicine.disease ,Dermatology ,Natural history ,stomatognathic diseases ,030220 oncology & carcinogenesis ,business - Abstract
(1) Objective: To review the criteria proposed by Cerero-Lapiedra et al. and to retrospectively identify the under-diagnosed disease in patients diagnosed with proliferative verrucous leukoplakia. (2) Materials and methods: In this study, we included patients who were diagnosed with leukoplakia (histological label consistent with the clinical diagnosis, n = 95), and cases with a final diagnosis within the spectrum of proliferative verrucous leukoplakia (n = 110) as defined by Batsakis et al. We applied the criteria proposed by Cerero-Lepiedra et al. to screen for the possible cases of proliferative verrucous leukoplakia. (3) Results: Although many of our patients satisfied specific isolated criteria, only 11 cases satisfied specific combinations of the guidelines to satisfy a diagnosis of proliferative verrucous leukoplakia. However, due to the lack of follow-up data, the disease is not confirmed in these 11 cases. (4) Conclusion: A limited number of cases of proliferative verrucous leukoplakia were diagnosed using the criteria given by Cerero-Lapiedra et al. The true natural history of the disease could not be studied due to the lack of follow-up data. (5) Clinical relevance: Proliferative verrucous leukoplakia presenting as hyperkeratosis or mild epithelial dysplasia are often not followed up, and they subsequently transform into carcinoma. Thus, clinicians must be vigilant whenever they encounter leukoplakia, especially with multifocal presentations. In such cases, the follow-up data are the key to understanding the true nature of the disease entity.
- Published
- 2021
30. Geochemical characteristics and quality of groundwater evaluation for drinking, irrigation, and industrial purposes from a part of hard rock aquifer of South India
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N Subba, Rao, A, Dinakar, M, Sravanthi, and B Karuna, Kumari
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Drinking Water ,Water Quality ,Humans ,India ,Groundwater ,Water Pollutants, Chemical ,Environmental Monitoring - Abstract
The present study is a part of hard rock aquifer of Telangana, South India, where the groundwater is withdrawn heavily for drinking, irrigation, and small-scale industrial purposes. Geochemical characteristics explain the chemical processes, which control the groundwater chemistry and consequently the groundwater quality, while the chemical quality of groundwater is adversely affected by anthropogenic activities, which damage the water environment. The focus of the present study was, thus, to know the origin of geochemical characteristics and also to evaluate the quality of groundwater for various purposes for taking the suitable remedial measures to provide safe water to the local community. Geochemical relations (GR) and hierarchical cluster analysis (HCA) were used to assess the geochemical characteristics. Entropy weighted groundwater quality index (EWGQI), United States Soil Salinity Laboratory Staff (USSLS)'s diagram, and groundwater quality criteria for water supply pipes (GQCW) were used to evaluate the groundwater quality for drinking, irrigation, and industrial purposes, respectively. The study found that the water-rock interactions associated with ion exchange and evaporation were the prime geochemical factors controlling the geochemical characteristics and the anthropogenic activities as the secondary factor. These observations were further supported by HCA. According to the EWGQI, 34.97% of the spatial area was found to have the poor and very poor groundwater quality zones for drinking purpose, because of the dominance of TDS, Na
- Published
- 2020
31. Seasonal and Spatial Variation of Groundwater Quality Vulnerable Zones of Yellareddygudem Watershed, Nalgonda District, Telangana State, India
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N, Subba Rao, A, Dinakar, B Karuna, Kumari, D, Karunanidhi, and T, Kamalesh
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Cyclonic Storms ,Water Quality ,Geographic Information Systems ,Humans ,India ,Seasons ,Groundwater ,Water Pollutants, Chemical ,Environmental Monitoring - Abstract
Evaluation of seasonal and spatial variations in vulnerable zones for poor groundwater quality is essential for the protection of human health and to maintain the crop yields. With this objective, groundwater samples were collected seasonally (i.e., pre- and post-monsoon) from the Yellareddygudem watershed of Telangana, India. These samples were analysed for major chemical parameters (pH, TDS, Ca
- Published
- 2020
32. High efficiency spin filtering in magnetic phosphorene
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A. K. Nair, Karuna Kumari, S. Rani, S. J. Ray, P. Kumari, S. Majumder, and M. Venkata Kamalakar
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010302 applied physics ,Electron mobility ,Materials science ,Condensed matter physics ,Spintronics ,Doping ,General Physics and Astronomy ,Context (language use) ,02 engineering and technology ,021001 nanoscience & nanotechnology ,01 natural sciences ,Condensed Matter::Materials Science ,Phosphorene ,chemistry.chemical_compound ,Magnetization ,chemistry ,Nanoelectronics ,0103 physical sciences ,Condensed Matter::Strongly Correlated Electrons ,Physical and Theoretical Chemistry ,0210 nano-technology ,Spin-½ - Abstract
Phosphorene has a unique set of characteristics such as a semiconducting nature, good carrier mobility and low-spin orbit coupling aspects which makes it a highly prospective two dimensional material for cross-hybrid architectures in nanoelectronics, spintronics, and optoelectronics. In the spintronic context, the creation of a stable magnetic order in phosphorene can be immensely beneficial for designing phosphorene spin circuits. In this work, we present high efficiency spin filtering behaviour in magnetically rendered phosphorene. First, we calculate the effect of doping various 3d block elements in phosphorene to introduce a stable magnetic order. Next, by varying doping concentrations in distinct doping configurations, an extensive phase diagram has been obtained depicting the presence of various electronic and magnetic states. This allows us to achieve a high magnetisation in the presence of various transition metal atoms, with a spin polarisation of ∼100% in half-metallic regimes. The transport behaviour reveals a map of the spin injection efficiency showing enhancement with doping concentration and reaching a perfect spin filtering capacity of ∼100% in the presence of Ti, Cr, Mn, Co, and Fe atoms. The present results offer new insights into engineered designs of multi-functional phosphorene spintronic circuits.
- Published
- 2020
33. Magnetic and thermoelectric properties of α-MnO2 nanorods
- Author
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Ajay D. Thakur, Ashutosh Kumar, Karuna Kumari, and C. V. Tomy
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Hysteresis ,Magnetization ,Materials science ,Ferromagnetism ,Condensed matter physics ,Seebeck coefficient ,Thermoelectric effect ,Nanorod ,Coercivity ,Thermal conduction - Abstract
We investigate the magnetic and thermoelectric properties of α-MnO2 synthesized using the hydrothermal route. The nanorod structure having an aspect ratio of ∼10 is recorded using FESEM image. The magnetization vs temperature curves reveals the ferromagnetic like ordering below a magnetic transition temperature (∼28 K) which is also confirmed from the hysteresis curve at 10 K. The coercivity in the sample was observed to be 2.9 kOe and remnant magnetization was observed as 0.34 emu/g. Thermoelectric measurements reveal the n-type conduction in the system with a Seebeck coefficient of ∼160 µV/K, the electrical conductivity of ∼42 S/m and the thermal conductivity of 0.65 W/m-K at 300 K.
- Published
- 2020
34. Thermoelectric properties in spark plasma sintered La0.7Sr0.3Mn0.5Co0.5O3
- Author
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Ajay D. Thakur, Karuna Kumari, D. Sivaprahasam, and Ashutosh Kumar
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Materials science ,Condensed matter physics ,Spin states ,chemistry ,Electrical resistivity and conductivity ,Seebeck coefficient ,Thermoelectric effect ,Figure of merit ,chemistry.chemical_element ,Crystallite ,Plasma ,Cobalt - Abstract
LaCoO3 shows interesting thermoelectric properties due to the existence of different charge states along with different spin states of cobalt in the system. Substitution at La and Co site leads to tune the electrical conductivity and hence Seebeck coefficient. We show that spark plasma sintered (SPS) La0.7Sr0.3Mn0.5Co0.5O3 sample shows an increase in the value of electrical conductivity at higher temperature with nominal decrease in the Seebeck coefficient. This improves the figure of merit for La0.7Sr0.3Mn0.5Co0.5O3 polycrystalline sample at 800 K. The maximum figure of merit for SPS La0.7Sr0.3Mn0.5Co0.5O3 is 0.006 at 800 K.
- Published
- 2020
35. Effect of temperature and magnetic field in resistive switching behavior of La0.7Ca0.3MnO3.rGO nano-composite
- Author
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Karuna Kumari, Ajay D. Thakur, Soham Ray, and Ashutosh Kumar
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Materials science ,Nano composites ,Resistive switching ,Composite material ,Magnetic field - Published
- 2020
36. Surface electronic structure, thermodynamic stability of Na1/2Bi1/2TiO3 (001) surfaces and their relevance to A-site cation ordering in bulk phases: A first-principles study
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Karuna Kumari, P, Niranjan, Manish K, Karuna Kumari, P, and Niranjan, Manish K
- Abstract
Surface electronic structure and energetics of (001) surfaces of relaxor ferroelectric Na1/2Bi1/2TiO3 (NBT) are explored theoretically within the framework of ab-initio density functional theory. In particular, polar and nonpolar surfaces of tetragonal NBT with bulk P4mm and P4bm symmetries are explored. For P4mm symmetry, (NaO)-, (BiO)+ and (TiO2)0 terminated surfaces and for P4bm symmetry, (Na1/2Bi1/2O)0 and (TiO2)0 -terminated surfaces are considered. The surface electronic structures for different terminations are found to differ with respect to bulk and with each other due to different polarity compensation mechanisms. In case of (BiO)+ and (NaO)- terminated surfaces, the Fermi level shifts slightly above the conduction band minimum (CBM) and below the valence band minimum (VBM) respectively. The resulting localized surface gap states near the VBM and CBM provides sufficient positive and negative charge required for compensation in agreement with the polarity compensation criteria. Furthermore, localized surface states are also formed at energies (~12 eV) deep in the gap below the VBM. The relative thermodynamic stability, reconstructions and relaxations of NBT surfaces may be expected to be correlated with the formation of these deep energy localized surface states. The magnitudes of surface relaxations are found to depend strongly on the nominal charges of the surfaces. The surface energies of polar NaO, BiO and nonpolar TiO2 terminations are found to be significantly larger than that of nonpolar Na1/2Bi1/2O termination. Thus the arrangement of nonpolar-nonpolar planes forming the sequence –Na1/2Bi1/2O–TiO2–Na1/2Bi1/2O–TiO2- may be expected to be more favourable than the sequence of polar-nonpolar planes -NaO-TiO2-BiO-TiO2-NaO-. This favourable arrangement of nonpolar planes may likely influence the degree of A-site cation ordering in Na1/2Bi1/2TiO3 which in turn may influence the degree of coexistence of R3C and CC phases of NBT at the room temperature.
- Published
- 2020
37. A robust framework for quality enhancement of aerial remote sensing images
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A. V. Narasimhadhan, Devikalyan Das, Eerapu Karuna Kumari, Shyam Lal, and Shilpa Suresh
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Contrast enhancement ,Image quality ,business.industry ,Computer science ,0211 other engineering and technologies ,Particle swarm optimization ,02 engineering and technology ,Condensed Matter Physics ,Atomic and Molecular Physics, and Optics ,Quality enhancement ,Electronic, Optical and Magnetic Materials ,Robustness (computer science) ,0202 electrical engineering, electronic engineering, information engineering ,020201 artificial intelligence & image processing ,Computer vision ,Artificial intelligence ,business ,021101 geological & geomatics engineering - Abstract
This paper proposes a robust framework for quality restoration of remotely sensed aerial images. Proposed framework works in three steps: (1) Efficient color balancing and saturation adjustment, (2) Efficient color restoration, (3) Modified contrast enhancement using particle swarm optimization (PSO). In order to show the robustness, step-wise results of proposed framework is illustrated. Several aerial images from two publically available datasets are tested to support the robustness of the proposed framework over existing image quality restoration methods. The experimental results of proposed framework and other existing quality restoration methods are compared in terms of NIQMC, BIQME, MICHELSON, DE, EME and PIXDIST along with visual experimental results. Based on experimental results conducted on several aerial images suggest that the proposed framework is outperform over existing quality restoration methods.
- Published
- 2018
38. Staged Minimally Invasive Surgical Approach in the Management of Glandular Odontogenic Cyst
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Kumar Vineeth, R.M. Lalitha, Marin Abraham, and Karuna Kumari
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03 medical and health sciences ,medicine.medical_specialty ,0302 clinical medicine ,Surgical approach ,business.industry ,030220 oncology & carcinogenesis ,Glandular odontogenic cyst ,Medicine ,030206 dentistry ,Radiology ,business ,medicine.disease ,General Dentistry - Abstract
Aim The aim of the study was to report a unique case of glandular odontogenic cyst (GOC) in an unusual location of anterior maxilla. Materials and methods Considering the age, sex, and location of the lesion, a minimally invasive surgical procedure was opted considering esthetics, such as decompression followed by enucleation and fresh frozen bone (FFB) grafting. To arrive at the diagnosis, cytokeratin (CK)-19 was employed to differentiate from suspected intraosseous mucoepidermoid carcinoma. Results With the evidence of pre- and post treatment histopathological changes, the lesion appeared less aggressive justifying the treatment executed. Conclusion Glandular odontogenic cyst is a locally aggressive jaw cyst, which has a high rate of cortical perforation and recurrence that poses both diagnostic and therapeutic challenges. Clinical significance Treatment of decompression, followed by enucleation may be considered as an effective option in comparison to aggressive surgical intervention. How to cite this article Kumari K, Sowmya SV, Vineeth K, Rao RS, Lalitha RM, Augustine D, Haragannavar VC, Nambiar S, Abraham M. Staged Minimally Invasive Surgical Approach in the Management of Glandular Odontogenic Cyst. World J Dent 2018;9(1):48-52.
- Published
- 2018
39. Distribution of Gastropods in the Intertidal Environment of South, Middle and North Andaman Islands, India
- Author
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P. M. Mohan, K. K. Dil Baseer Sabith, Radha Karuna Kumari, M. Muruganantham, Chinnusamy Jeeva, and Vibha V. Ubare
- Subjects
Shore ,geography ,Rocky shore ,geography.geographical_feature_category ,Ecology ,Abundance (ecology) ,Biodiversity ,Period (geology) ,Intertidal zone ,Monsoon ,Cove - Abstract
Andaman and Nicobar Islands, the gastropod diversity is high, due to the majority of shores are rocky. The wet rocky shore promotes algal growth, which is ultimate for feeding ground for gastropod growth and development leading to more diversity. The global warming, anthropogenic activities, industrial and domestic pollution, etc., have accelerated the loss of coastal and marine biodiversity components over the last few decades which has been of great concern. However, except global warming, the other factors were of least concern with reference to Andaman and Nicobar Islands biodiversity due to a pristine environment. Therefore, exploration of biodiversity in these islands is essential to create a baseline data for record and future research. Four locations of south to north Andaman Islands which represented Carbyns Cove from south Andaman, Rangat and Mayabunder from the Middle Andaman and Diglipur from the North Andaman were selected for this study. Gastropoda species were collected for a period of one year in three prevailing seasons of Andaman and Nicobar Islands. They are South West Monsoon (SW monsoon), North East Monsoon (NE Monsoon) and Non Rainy Seasons (NR Seasons). The present study of gastropods distribution in the South, Middle and North Andaman groups of Islands suggested that there are 71 species belonging to 52 genus and 33 families. At any one of the time and any one of the locations, only one occurrence was noticed for 38 species and remaining 33 species were overlapping with respect to stations and seasons. Evaluation of the cluster suggested that Cluster A (NR season in Carbyns Cove) and Cluster B (NE and SW Monsoon in Mayabunder) as a separate entity among the 12 combinations of stations and seasons due to their species representation. It was also concluded that out of 71 studied species, 3 species were not reported till date in these Island environment and 2 species from any other parts of India.
- Published
- 2018
40. Temperature-dependent resistive switching behaviour of an oxide memristor
- Author
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S. Majumder, Ajay D. Thakur, Karuna Kumari, and S. J. Ray
- Subjects
Materials science ,Condensed matter physics ,Graphene ,Mechanical Engineering ,Oxide ,Memristor ,Atmospheric temperature range ,Condensed Matter Physics ,Thermal conduction ,Space charge ,law.invention ,Hysteresis ,chemistry.chemical_compound ,chemistry ,Mechanics of Materials ,law ,General Materials Science ,Charge carrier - Abstract
In this work, we report the temperature-dependent transport and resistive switching behaviour of a promising hybrid structure made of La0.7Ca0.3MnO3 (LCMO) and reduced graphene oxide (rGO). The current-voltage (IV) characteristics are non-linear across the studied temperature range of 100 K–300 K, which is also temperature-dependent. The memristive effect is most prominent at 200 K, while the reduction of hysteresis in the IV-curve with decrease in temperature is ascribed to the low thermal energy of the charge carriers. The charge transport in the SET and RESET process at different temperatures can be explained using trap-controlled space charge limited conduction mechanism for temperature > 200 K and Poole-Frenkel emission at temperatures below that.
- Published
- 2021
41. Pulsed voltage induced resistive switching behavior of copper iodide and La0.7Sr0.3MnO3 nanocomposites
- Author
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Shantanu Majumder, S. J. Ray, and Karuna Kumari
- Subjects
Materials science ,Nanocomposite ,business.industry ,Pulse (signal processing) ,Mechanical Engineering ,Schottky diode ,02 engineering and technology ,010402 general chemistry ,021001 nanoscience & nanotechnology ,Condensed Matter Physics ,01 natural sciences ,0104 chemical sciences ,Mechanics of Materials ,Resistive switching ,Optoelectronics ,Pulse wave ,General Materials Science ,0210 nano-technology ,business ,Pulse-width modulation ,Voltage ,Copper iodide - Abstract
In this study, we reported the presence of robust, reversible unipolar electric pulse-induced resistance switching effects in copper iodide and La0.7Sr0.3MnO3 nanocomposites. The properties of the resistive switching and change in the I–V pattern was analyzed over 100 cycles by hysteretic pulse current–voltage measurement (pulse width = 0.01 s and pulse period = 0.02 s). The charge transport analysis of various regions of the 1st cycle pointed towards Schottky emission and Poole–Frenkel effect to be the dominant mechanisms in lower bias region and higher bias region respectively. On the other hand, resistive switching turned out to be stable over 1000 cycles of square electrical pulse train measurement where frequency of 125 Hz (pulse period 2 ms and pulse width 100 μ s ) and 250 Hz (pulse period 1 ms and pulse width 50 μ s ) were used.
- Published
- 2021
42. Appraisal of vulnerable zones of non-cancer-causing health risks associated with exposure of nitrate and fluoride in groundwater from a rural part of India
- Author
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N. Subba Rao, B. Karuna Kumari, and A. Dinakar
- Subjects
media_common.quotation_subject ,Non cancer ,India ,Aquifer ,Septic tank ,Risk Assessment ,Biochemistry ,Toxicology ,Fluorides ,chemistry.chemical_compound ,Nitrate ,Animals ,Humans ,Groundwater ,General Environmental Science ,media_common ,geography ,Nitrates ,geography.geographical_feature_category ,chemistry ,Environmental science ,Rural area ,Groundwater quality ,Fluoride ,Water Pollutants, Chemical ,Environmental Monitoring - Abstract
The present investigation carried out from a rural part of Nalgonda district, Telangana, India was to know the general groundwater quality and also to measure the vulnerable zones of non-cancer-causing health risks with respect to infants, children, and adults due to the consumption of nitrate and fluoride contaminated groundwater. Groundwater samples were collected from the study area and analyzed for the major physicochemical parameters. Nitrate and fluoride contents ranged from 2 to 700 mg/L and 0.3 to 4.7 mg/L, in which 59.09% and 31.82% of the groundwater samples exceed the safe drinking water limits of 45 mg/L and 1.5 mg/L, which spread over an area of 77.59% and 25.41%, respectively. Domestic wastes, septic tank spillages, animal wastes, and nitrate composts are the prime sources of nitrate, while the fluoride-bearing minerals and phosphate fertilizers are the main sources of fluoride in the aquifer regime. Individual non-cancer-causing health index obviously suggested the nitrate as the higher health risk than fluoride. The total non-cancer-causing health index was observed to be more than the acceptable limit of 1.0 in 95.5% of the total groundwater samples concerning infants, children, and adults. The vulnerable intensity of this index appeared to be higher in infants than in children and adults due to the differences in their body weights. The spatial coverage area of very health risk is more in infants (37.45%) than that of children (36.78%) and adults (30.34%). Thus, the present study suggested suitable measures for the improvement of groundwater quality and consequently the health conditions of the locals.
- Published
- 2021
43. Mineral composition, pigments, and postharvest quality of guava cultivars commercially grown in India
- Author
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Kumari, Priyanka, primary, Mankar, Abhay, additional, Karuna, Kumari, additional, Homa, Fozia, additional, Meiramkulova, Kulyash, additional, and Siddiqui, Mohammed Wasim, additional
- Published
- 2020
- Full Text
- View/download PDF
44. Charge transport and resistive switching in a 2D hybrid interface
- Author
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S. J. Ray, Ajay D. Thakur, Ashutosh Kumar, and Karuna Kumari
- Subjects
Materials science ,Fabrication ,Oxide ,Insulator (electricity) ,02 engineering and technology ,010402 general chemistry ,01 natural sciences ,law.invention ,chemistry.chemical_compound ,X-ray photoelectron spectroscopy ,law ,General Materials Science ,High-resolution transmission electron microscopy ,Graphene ,business.industry ,Mechanical Engineering ,Transition temperature ,Doping ,021001 nanoscience & nanotechnology ,Condensed Matter Physics ,0104 chemical sciences ,chemistry ,Mechanics of Materials ,Optoelectronics ,0210 nano-technology ,business - Abstract
With the recent surge of emerging memory technologies, the demand for storage capacities in various applications is more than ever. Oxide material based memory elements are promising candidates for designing future non-volatile storage architectures. In this work, we investigated the structural, transport and resistive switching (RS) behaviour of a novel hybrid structure made of calcium doped LaMnO3 (LCMO) and reduced graphene oxide (rGO). Very stable and robust bipolar RS behaviour was observed with additional tunability obtained through the variation in the rGO concentration in the structure. The presence of a metal to insulator transition is clearly observed with a lowering of the transition temperature on increase in the rGO content. Both the effects can be attributed to the oxygen vacancy generation and filament formation as confirmed from the X-ray photoelectron spectroscopy (XPS) and high resolution transmission electron microscopy (HRTEM) measurements. The combined attributes of easy fabrication route, robust switching behaviour and environmental stability of the present system makes it a superior candidate for future non-volatile memory design and oxide electronics.
- Published
- 2021
45. Conservation of Coral Reef Environment: Perspectives for Tropical Islands
- Author
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Mohan, P.M., primary and Karuna Kumari, Radha, additional
- Published
- 2008
- Full Text
- View/download PDF
46. Effect of Methyl Jasmonate on Growth and Flowering Behavior of Strawberry cv. Nabila
- Author
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zawma, Lalnun, primary, Karuna, Kumari, additional, Rani, Ruby, additional, Nahakpam, Sareeta, additional, Bahera, Subrat Keshori, additional, and Sahay, Sanjay, additional
- Published
- 2020
- Full Text
- View/download PDF
47. Effect of Zero Tillage and Six Different Genotypes on Growth Attributes of Wheat (Triticum aestivum L.)
- Author
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ta, Mam, primary, Haque, Mizanul, additional, Karuna, Kumari, additional, Kumar, Ashwini, additional, Kumar, Manish, additional, Pandit, Santosh Kumar, additional, and Raj, Shubham, additional
- Published
- 2020
- Full Text
- View/download PDF
48. Floral Biology and Pollen Viability of Some Mango (Mangifera indica L.) Cultivars
- Author
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Mandal, Sunil Kumar, primary, Karuna, Kumari, additional, Kumar, Ashwini, additional, Mankar, Abhay, additional, and Sahay, Sanjay, additional
- Published
- 2020
- Full Text
- View/download PDF
49. Calcium Chloride, Chitosan and Low Temperature Storage (7 ̊C) Effect on Biochemical, PLW and Marketability of Strawberry cv. Camarosa
- Author
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Kumar, Ashwini, primary, Karuna, Kumari, additional, Ahmad, Feza, additional, Mankar, Abhay, additional, and Sinha, Ankita, additional
- Published
- 2020
- Full Text
- View/download PDF
50. Study on compatibility of different coloured mango pollinizer among commercial cultivars
- Author
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Mandal, Sunil Kumar, primary, Karuna, Kumari, additional, Kumari, Nitu, additional, Kumar, Ashwini, additional, and Kumari, Soni, additional
- Published
- 2020
- Full Text
- View/download PDF
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