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Search Results: 1 - 10 of 164001 matches for " B. Sarath Kumar "
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Rotating Machinery Predictive Maintenance Through Expert System
M. Sarath Kumar,B. S. Prabhu
International Journal of Rotating Machinery , 2000, DOI: 10.1155/s1023621x00000348
Abstract: Modern rotating machines such as turbomachines, either produce or absorb huge amount of power. Some of the common applications are: steam turbine-generator and gas turbine-compressor-generator trains produce power and machines, such as pumps, centrifugal compressors, motors, generators, machine tool spindles, etc., are being used in industrial applications. Condition-based maintenance of rotating machinery is a common practice where the machine's condition is monitored constantly, so that timely maintenance can be done. Since modern machines are complex and the amount of data to be interpreted is huge, we need precise and fast methods in order to arrive at the best recommendations to prevent catastrophic failure and to prolong the life of the equipment. In the present work using vibration characteristics of a rotor-bearing system, the condition of a rotating machinery (electrical rotor) is predicted using an off-line expert system. The analysis of the problem is carried out in an Object Oriented Programming (OOP) framework using the finite element method. The expert system which is also developed in an OOP paradigm gives the type of the malfunctions, suggestions and recommendations. The system is implemented in C
Timeserving Routing Protocol Implementation to accomplish best throughput and fairness
Narasimha Rao V L Potta,B. Sarath Kumar
International Journal of Computer & Electronics Research , 2012,
Abstract: The latest technology for next generation Wireless networking is Wireless Mesh Networks (WMNs), with low cost and easy deploying. The WMNs are desirable for communication paradigm. The WMNs are more advantageous over other wireless networks. The existing routing protocols which transmits the traffic through pre-determined path which don’t provide security. This paper proposes a routing protocol called simplistic constructive routing protocol (SPRP) which supports multiple flows in wireless mesh networks. There are four major components in the SPRP which provides fairness and high throughput: 1) To minimize the multiple data transmissions Constructive forwarding path selection to provide multiple paths while minimizing duplicate transmissions, 2) Constructive rate control to determine an appropriate transfer rate according to the current network conditions. 3) Inter node loss recovery to efficiently find and resend lost packets, and 4) clock-based forwarding to let only the priority node to forward the traffic. Our result shows that SPRP significantly performs existing routing and a pivotal time serving routing protocol.
Formulation and in vitro evaluation of floating drug delivery system for salbutamol sulphate
I. Sarath Chandiran,B. Pavan Kumar,V. Narayan
International Journal of Pharmacy and Biomedical Sciences , 2010,
Abstract: The purpose of this research work is to formulate the salbutamol sulphate as a floating matrix tablets and control the drug release up to 24 h for administration as once daily dose. Salbutamol Sulphate is a short acting bronchodilators which have short biological half life about 2 - 4 h. Floating matrix tablets were formulated by using swelling polymer like Methylcellulose, Hydroxy propyl methyl cellulose (K100M, K4M) with different concentration 25, 50, 75 % w/w of the polymer were used for the preparation of the floating matrix tablets. The formulation variables like hardness, polymer concentrations, and shape of the tablets were optimized to achieve the floating nature of the tablet in stomach for 24 h. In addition stearic acid is included in this formulation to evaluate their release characteristics. From this the hydrophilic floating matrix control the release up to 12 h with HPMC K100M at 75 % w/w of the polymer concentration. The formulations, which have stearic acid retards the drug release by controlling the water penetrations in to the floating matrix tablets, sustained their drug release above 12 h. The floating matrix tablets with minimum hardness of 5 kg/cm2 and round shaped tablets exhibited better buoyancy.
4. Preparation and evaluation of aceclofenac loaded biodegradable microspheres
I. Sarath Chandiran,T. Sivakumar,B. Pavan Kumar
International Journal of Pharmaceutical and Biomedical Research (IJPBR) , 2010,
Abstract: In this study, the use of biodegradable polymers for microencapsulation of aceclofenac using solvent evaporation technique was investigated. Poly lactic acid was selected as a retardant polymer because of its advantages over other biodegradable polymers. Four different batches of microspheres were prepared by varying the concentration of polymer from 50% to 80% w/w. The microspheres were characterized for drug content, percentage yield and encapsulation efficiency, particle size analysis and surface morphology. Microsphere prepared with high drug content produces higher percentage yield and encapsulation efficiency values. It was observed the increase in concentration of the polymer, increases the mean particle size of the microspheres. The effect of polymer concentration on the in vitro release of aceclofenac from the microspheres was also studied. It can be seen that by increasing the polymer concentration, decreases the rate of drug release from the microspheres dramatically. The kinetics of drug release from F1 and F2 microspheres predominantly follows Higuchi pattern followed by zero order and then first order. The release kinetics of F3 and F4 predominantly follows zero order followed by Higuchi and then first order.
Local excision inadequate in the treatment of anal canal leiomyosarcoma
Kumar G,Chandra Sarath,Krishnan R
Saudi Journal of Gastroenterology , 2010,
Abstract: Leiomyosarcoma of the anal canal is an uncommon neoplasm of the gastrointestinal tract. We report a 45-year-old lady with anal canal leiomyosarcoma. In view of its rarity, we report its presentation and management. In the setting of a recurrent tumor with high-grade histological appearance, local excision would be deemed unsafe.
Generating Concise and Readable Summaries of XML Documents
Maya Ramanath,Kondreddi Sarath Kumar,Georgiana Ifrim
Computer Science , 2009,
Abstract: XML has become the de-facto standard for data representation and exchange, resulting in large scale repositories and warehouses of XML data. In order for users to understand and explore these large collections, a summarized, bird's eye view of the available data is a necessity. In this paper, we are interested in semantic XML document summaries which present the "important" information available in an XML document to the user. In the best case, such a summary is a concise replacement for the original document itself. At the other extreme, it should at least help the user make an informed choice as to the relevance of the document to his needs. In this paper, we address the two main issues which arise in producing such meaningful and concise summaries: i) which tags or text units are important and should be included in the summary, ii) how to generate summaries of different sizes.%for different memory budgets. We conduct user studies with different real-life datasets and show that our methods are useful and effective in practice.
An Implementation of Content Boosted Collaborative Filtering Algorithm
Boddu Raja Sarath Kumar,,Maddali Surendra Prasad Babu
International Journal of Engineering Science and Technology , 2011,
Abstract: Collaborative filtering (CF) systems have been proven to be very effective for personalized and accurate recommendations. These systems are based on the Recommendations of previous ratings byvarious users and products. Since the present database is very sparse, the missing values are considered first and based on that, a complete prediction dataset are made. In this paper, some standardcomputational techniques are applied within the framework of Content-boosted collaborative filtering with imputational rating data to evaluate and produce CF predictions. The Content-boosted collaborative filtering algorithm uses either naive Bayes or means imputation, depending on the sparsity of the original CF rating dataset. Results are presented and shown that this approach performs better than a traditional content-based predictor and collaborative filters.
Testing for Random Walk Behavior in Indian Bond Market  [PDF]
A. Sarath Babu
Theoretical Economics Letters (TEL) , 2017, DOI: 10.4236/tel.2017.74052
Abstract: This study examines the random walk behavior of Indian bond market. Bond indices published by Clearing Corporation of Indian (CCIL) were used in this study. The hypothesis is tested with multiple variance ratio tests from daily and weekly data, from 3-Jan.-2011 to 30-Dec.-2016. This paper also applies the bootstrap procedure on all the tests used because it shows desirable small sample properties under conditional heteroscedasticity. Variance test ratios show that Indian bond market does not follow random walk behavior.
Odontogenic Myxoma of the Mandible
Rakesh Kumar Manne,Venkata suneel Kumar,P. Venkata Sarath,Lavanya Anumula,Sridhar Mundlapudi,Rambabu Tanikonda
Case Reports in Dentistry , 2012, DOI: 10.1155/2012/214704
Abstract: Odontogenic myxomas are benign but locally aggressive neoplasms found almost exclusively in the jaws and arise only occasionally in other bones. We present a rare case of odontogenic myxoma occurring in the mandible of a 19-year-old male patient with a brief review of clinical and radiological features, and diagnostic and operative dilemmas in managing the same.
Odontogenic Myxoma of the Mandible
Rakesh Kumar Manne,Venkata suneel Kumar,P. Venkata Sarath,Lavanya Anumula,Sridhar Mundlapudi,Rambabu Tanikonda
Case Reports in Dentistry , 2012, DOI: 10.1155/2012/214704
Abstract: Odontogenic myxomas are benign but locally aggressive neoplasms found almost exclusively in the jaws and arise only occasionally in other bones. We present a rare case of odontogenic myxoma occurring in the mandible of a 19-year-old male patient with a brief review of clinical and radiological features, and diagnostic and operative dilemmas in managing the same. 1. Introduction Odontogenic myxomas (OMs) are benign tumors derived from embryonic mesenchymal elements of dental anlage [1, 2]. OM appears to originate from dental papilla, follicle, or periodontal ligament. The evidence for its odontogenic origin arises from its almost exclusive location in the tooth bearing areas of the jaws, its occasional association with missing or unerupted teeth, and the presence of odontogenic epithelium [1, 3]. According to the World Health Organization (WHO), OM is classified as benign tumor of ectomesenchymal origin with or without odontogenic epithelium [1]. The odontogenic nature of the myxomas has been challenged by some authors because of the appearances, whilst consistent with odontogenic ectomesenchyme, could also represent a more primitive fibroblastic or undifferentiated tissue [4]. Most of the OMs reported were young adults affected mostly in their second and third decade of life with marked female predilection [1, 3, 5]. OM can occur both in bone and soft tissue. Although intraosseous myxoma has been reported in various anatomical sites, the majority of these tumors occur in the mandible, followed by the maxilla [1, 2, 5, 6]. Clinically, OMs are slow-growing, painless, and site-aggressive tumors. Since pain and hypoesthesia are not common, the lesions may reach a considerable size before patient perceives its existence and seeks treatment. Larger lesions may cause tooth displacement and cortical bone expansion [4, 6]. Radiologically, the appearance may vary from a unilocular radiolucency to a multicystic lesion with well-defined or diffused margins with fine, bony trabeculae within its interior structure expressing a “honey coumbed,” “soap bubble,” or “tennis racket” appearance [1, 7]. A unilocular appearance may be seen more commonly in children and in anterior parts of the jaws. Root resorption is rarely seen, and the tumor is often scalloped between the roots [6]. OMs are not encapsulated, thus promoting significant infiltration into the adjacent medullar bone [4]. The OM exhibits abundant extracellular production of ground substance and thin fibrils by the delicate spindle-shaped cells. These undifferentiated mesenchymal cells are capable of
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