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Articles by R. Karthik
Total Records ( 8 ) for R. Karthik
  Samit Kumar Ghosh , P.B. Natarajan , Tapan Kumar Dey , J. Nagaraju , R. Karthik and T.S. Arulananth
  The Internet of Things (IoT) has started to give rise to real-world applications. It is used to connect the various objects with each other through the internet without any human interaction that shape our daily lives. Wireless Sensor Network (WSN) is one of the most fundamental technologies of the Internet of Things (IoT). Various IoT devices are connected through the internet by making a wireless sensor network. A wireless sensor network is composed of various nodes transmitting wirelessly the information they captured. Each node consists of sensors and actuators. As sensors are battery operated, so power consumption is a very important issue while connecting IoT devices. In this study, we proposed a multi-hop routing protocol which aims to reduce the energy of the network while transmitting data to a central micro-controller and then to the internet, thus increases the network life time.
  T. Anu Radha , K. Aruna Manjusha , R. Karthik , Mahendra Vucha and A.L. Siridhara
  Audio parsers are applications that scan through a particular file and extract information from them. Parsers are mainly used in design applications to test encoders and also in design of codecs. Players are needed to play the files. Very few parsers are available that can parse as well as play audio files. Also, most players available do not display parsed information. So, a well-designed audio parser and player is needed. Our project is to design a gui application that can parse and play audio files. The codecs supported are MP3 and AAC. In AAC, the ADIF and ADTS formats are supported. ID3v2 tags too are parsed and displayed. An audio player in integrated to play the files from the application itself. Also, features are added to the player to enhance the functionality. Play, pause, stop and seek features are supported. The application can be easily extended to other codecs.
  G. Prabhakar Reddy , K. Sai Prasad , N. Chandra Shekar Reddy and R. Karthik
  The key aspect of privacy protection is information sanitization intent for better data utility. The information is classified into three type’s, i.e., first identifiers which labels the identity, second quasi-identifiers the type of disclosure that needs to be focused on identity disclosure. A quasi-identifier refers to a attributes subsets that can uniquely identify tuples like personal health information consists name, address, gender, mobile number and third is sensitive attributes like disease, salary must be disclosed form others. Privacy is a key issue where prospects will be harmed by inappropriate disclosure of few assets.
  Mahendra Vucha , Himaja Anubolu , A.L. Siridhara and R. Karthik
  Although, many safeguards and security policies have been proposed for Electronic Health Record (EHR), the need of privacy and security for EHR systems persists. This study presents the literature review and features of frequently adopted security policies for EHR systems. In this study, the literature of security techniques and methods adopted for EHR systems have been collected until 2016 and then techniques were analyzed to identify best security method for maintaining nation health records. This survey highlights the features that are essential for security policies of EHR systems and it also presents the technical features and mandate access control methods through proper cryptography architectures for the nation health record and Health Information Exchange (HIE) among the nations.
  R. Karthik , Angelin C. Pushpam , K. Ramalingam , D. Yuvaraj and M.C. Vanitha
  Shrimp farming is one of the most important aquaculture and economically lucrative practices of maritime countries. Providing a Specific Pathogen Free (SPF) shrimps to the farmers is a big challenge that must be addressed to meet the demand. In general, microalgae are utilized in aquaculture as a live feed for the shrimps. However, their importance in the attenuation of negative impacts of pathogenic microbial load, eutrophication and promotion of shrimps growth has to be delineated by experimental investigations to justify the above specific pathogen free shrimps. The present study was carried out to investigate the feeding of five different microalgae and algae enriched Artemia salina. Nauplii on digestive enzyme activity, growth, survival rate, microbial load on Penaeus monodon and Litopenaeus vannamei from zoea to post larvae (20 stages) and other water quality. Microalgae such as Isochrysis galbana, Cheatoceros calcitrans, Tetraselmis sp., Chlorella sp. and Nannochloropsis sp. were obtained from AMET Microbial Culture Collection Centre, Department of Marine Biotechnology, AMET University. Penaeus monodon and Litopenaeus vannamei at PL 20 stage showed maximum protease and amylase (digestive enzyme) activity, maximum length and survival rate when fed with Artemia salina nauplii enriched with C. calcitrans followed by Chlorella sp. On studying the water quality parameters such as, pH, temperature, salinity, dissolved oxygen and ammonia it was found better in tank II where the shrimps were fed with Artemia salina enriched with C. calcitrans. Regarding the vibrio load at different stages of P. monodon and L. vannamei larvae and cultured water it was comparatively lower in tank II, where the shrimps were fed with Cheatoceros calcitrans and enriched Artemia salina than other groups. It is concluded that, the use of Cheatoceros calcitrans and enriched Artemia salina will reduce the potential negative impacts in the environment and promote production of shrimp larvae in hatcheries and fetch benefits to local economies.
  K. Ramalingam , D.R. Shyamala , N. Sri Kumaran , R. Karthik and M.C. Vanitha
  Vibriosis is one of the major pathogenic bacterial diseases in shrimp aquaculture. Since, the disease patterns differ and the causes of the diseases are multifactorial, the results of such diagnostic profile tests could be correlated to the differing patterns of the disease. The present study aimed to evaluate the metabolic profile (biochemical and enzymatic) of V. parahaemolyticus MTCC 451inoculated black tiger prawn P. monodon (Fabricius). The injected V. parahaemolyticus MTCC451 resulted in the outbreak of vibriosis in the tested P. monodon. The levels of Alkaline phosphatase activity, Acid phosphatase activity, Lactate dehydrogenase activity, Glutamate Pyruvate Transaminase (GPT) activity, Glutamate Oxaloacetate Transaminase activity, Chitinase activity, Water content, Sodium, Potassium, Calcium, Ascorbic acid and Histamine in Haemolymph, Hepatopancreas and Body muscle of P. monodon control Vs tested were noted. The laboratory results of the present investigation, using the inoculum Vibrio parahaemolyticus MTCC451 revealed that these endemic bacterial populations might become opportunistic pathogens, when hydroecological conditions are altered in the farm ponds and could bring the fatal episodes of mass mortality.
  D. Yuvaraj and R. Karthik
  Biosecure zero-exchange systems represent an emerging technology that provides a high degree of pathogen exclusion with minimal water exchange. An important ramification associated with reduced or zero water exchange is the increased importance of in situ microorganisms both in regulating biogeochemical cycles within the culture environment and in directly affecting shrimp growth and survival. The newest attempt to improve water quality and control diseases in aquaculture is the application of probiotics and/or enzymes to ponds. This concept of biological disease control, particularly using microbiological modulator for disease prevention has received widespread attention. Keeping the above points in mind, this work was performed with zero discharge using probiotics, monitoring all the physico-chemical parameters and nutrients. The microbial population of the water and sediment were analyzed throughout the culture period. Highlights of this study are, (a) In the experimental ponds 1 and 2, the shrimps had a better growth (34.5 and 32.6 g, respectively), compared to 29.8 g in the control pond and (b) There was no incidence of disease in the experimental ponds, whereas the control pond had some bacterial infections. These encouraging results may be attributed to the use of probiotics in zero water exchange system.
  K. Vijayaraghavan , R. Karthik and S.P. Kamala Nalini
  The study focuses on the research involved in generating hydrogen using algae as a renewable energy resource. Due to the decline in fossil fuel resource, the energy derived from biomass seems to be the only major source of world’s renewable energy. The hydrogen derived from algae is promising due to its sustainability, no green house gases emission during the combustion of hydrogen and security of its supply even at remote places. The novel approach of generating hydrogen at commercial scale from algae has been a curiosity among many researchers till today. This review study updates the research involved in hydrogen generation from algae based on light intensity and its photoperiod, nitrogen and sulfur content, fermentative metabolism and symbiosis. The following algal species had been widely investigated for hydrogen production namely: Chlamydomonas, Anabaena, Chorella, Oscillatoria, Scenedesmus and their mutant. The generation of hydrogen from algae is still at research level. Hence, this review would be an eye opener for researchers who are interested in generating hydrogen from algae.
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