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匹配条件： “Renjith Ramachandran” ，找到相关结果约978条。
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An Integrated Framework to Recommend Personalized Retention Actions to Control B2C E-Commerce Customer Churn
Shini Renjith
Computer Science , 2015, DOI: 10.14445/22315381/IJETT-V27P227
Abstract: Considering the level of competition prevailing in Business-to-Consumer (B2C) E-Commerce domain and the huge investments required to attract new customers, firms are now giving more focus to reduce their customer churn rate. Churn rate is the ratio of customers who part away with the firm in a specific time period. One of the best mechanism to retain current customers is to identify any potential churn and respond fast to prevent it. Detecting early signs of a potential churn, recognizing what the customer is looking for by the movement and automating personalized win back campaigns are essential to sustain business in this era of competition. E-Commerce firms normally possess large volume of data pertaining to their existing customers like transaction history, search history, periodicity of purchases, etc. Data mining techniques can be applied to analyse customer behaviour and to predict the potential customer attrition so that special marketing strategies can be adopted to retain them. This paper proposes an integrated model that can predict customer churn and also recommend personalized win back actions.
Hamiltonian Path in 2-Trees
P. Renjith,N. Sadagopan
Computer Science , 2015,
Abstract: For a graph, a spanning path is a path containing all vertices and it is also known as \emph{Hamiltonian path}. For general graphs, there is no known necessary and sufficient condition for the existence of Hamiltonian path and the complexity of finding a Hamiltonian path in general graphs is NP-Complete. We present a necessary and sufficient condition for the existence of Hamiltonian path in 2-trees. Using our characterization, we also present a polynomial-time algorithm for the existence of Hamiltonian path in 2-trees. We also highlight the fact that 2-trees are well-known subclass of chordal and planar graphs. This paper makes the first attempt in identifying a non-trivial subclass of planar graphs where Hamiltonian path is polynomial-time solvable which is otherwise NP-Complete on planar as well as chordal graphs. Our characterization is based on a deep understanding of the structure of 2-trees and we believe that the combinatorics presented here can be used in other combinatorial problems restricted to 2-trees.
Trust based secure de-forestation and timber theft alert in wireless sensor networks
P N. Renjith
- , 2018, DOI: 10.14419/ijet.v7i3.15366
Abstract: Deforestation is the permanent destruction of trees for timber and land. Deforestation and timber theft ends up with obliteration of entire forest in the earth. Deforestation has increased exponentially increase in this decade. It is well known that Deforestation is a prime reason for global warming, less tropical rainfalls and affects atmospheric oxygen level. In this paper, a novel query-based method has been intro-duced to alert deforestation to forest official. Trust analysis and data aggregation has been incorporated to improve security and fast trans-mission of information to the base station. Query based technique is used to evaluate the intrusion has been implemented. Simulation result proven that the ST-alert able to detect the trespasser and stop them from deforestation.
Guidelines Based Software Engineering for Developing Software Components  [PDF]
Muthu Ramachandran
Journal of Software Engineering and Applications (JSEA) , 2012, DOI: 10.4236/jsea.2012.51001
Abstract: Software guidelines have been with us in many forms within Software Engineering community such as knowledge, experiences, domain expertise, laws, software design principles, rules, design heuristics, hypothesis, experimental results, programming rules, best practices, observations, skills, algorithms have played major role in software development. This paper presents a new discipline known as Guidelines Based Software Engineering where the aim is to learn from well-known best practices and documenting newly developed and successful best practices as a knowledge based (could be part of the overall KM strategies) when developing software systems across the life cycle. Thereby it allows reuse of knowledge and experiences.
Left Atrial Myxoma—A Case Report  [PDF]
Ramachandran Muthiah
Case Reports in Clinical Medicine (CRCM) , 2016, DOI: 10.4236/crcm.2016.51002
Abstract: Atrial myxomas are the most common primary cardiac tumors. More than 90% are solitary. A large myxoma occupying in the left atrium producing mitral stenosis and regurgitation was demonstrated by 2D echocardiographic images in this case. It remained asymptomatic for a long period with a survival up to the age of 75 years in an elderly female.
Apical Right Ventricular Hypertrophic Cardiomyopathy—A Case Report  [PDF]
Ramachandran Muthiah
Case Reports in Clinical Medicine (CRCM) , 2016, DOI: 10.4236/crcm.2016.52010
Abstract: A relatively infrequent form of hypertrophic cardiomyopathy is the isolated apical variant and it is more common in oriental people, especially in the Japanese. It contributes 25% of cases of hypertrophic cardiomyopathy in Japan but only 1% to 2% in the non-Japanese population. It may occasionally present in the elderly and classically involve the apex of the left ventricle. An isolated apical right ventricular involvement had been detected in an elderly female by transthoracic two-dimensional echocardiographic imaging.
Right Atrial Myxoma—A Case Report  [PDF]
Ramachandran Muthiah
Case Reports in Clinical Medicine (CRCM) , 2016, DOI: 10.4236/crcm.2016.53013
Abstract: Myxomas comprise 6% to 10% of primary cardiac tumors in childhood. Less than 10% of patients with cardiac myxomas are under 15 years of age. A large myxoma occupying in the right atrium and prolapsing into the right ventricle, pulmonary artery and producing tricuspid and pulmonary valve obstructions was diagnosed by Transthoracic 2D echocardiographic imaging in a 12-year-old male child.
Left Ventricular Myxoma—A Case Report  [PDF]
Ramachandran Muthiah
Case Reports in Clinical Medicine (CRCM) , 2016, DOI: 10.4236/crcm.2016.53016
Abstract: Left ventricular myxomas are extremely rare and account for 2.5% of all cardiac myxoma cases. A left ventricular myxoma originating from the apical interventricular septum and projecting into the left ventricular cavity was diagnosed by Transthoracic two-dimensional echocardiographic imaging in a 29-year-old male. The presentation of myxoma with symptoms masquerading as infectious hepatitis and dilated cardiomyopathy with a measured ejection fraction of 20% has been described.
Left Ventricular “Horseshoe-Thrombus”—A Case Report  [PDF]
Ramachandran Muthiah
Case Reports in Clinical Medicine (CRCM) , 2016, DOI: 10.4236/crcm.2016.54026
Abstract: Thrombi represent the most frequently found intracardiac masses. Left ventricular thrombus (LVT) is an important complication in patients with ischemic heart diseases and in those with dilated cardiomyopathy and systolic heart failure. The diagnosis of left ventricular thrombus remains important since anticoagulation will reduce the risk of systemic embolization and stroke. Despite advances in other imaging modalities, echocardiography remains the most important tool for diagnosis and risk stratification in patients predisposed to develop left ventricular thrombi. Mural thrombi formed on the left ventricular endocardium and horseshoe-shaped in chronic dilated cardiomyopathy, masquerading as left ventricular endomyocardial fibrosis was diagnosed by transthoracic 2D echocardiographic imaging in a 38 years old middle aged man. Background of this case highlighted the pathophysiology, high risk echocardiographic features and the role of anticoagulant therapy in LV thrombus with dilated cardiomyopathy.
Right Ventricular Myxoma—A Case Report  [PDF]
Ramachandran Muthiah
Case Reports in Clinical Medicine (CRCM) , 2016, DOI: 10.4236/crcm.2016.54030
Abstract: From an epidemiologic perspective, cardiac myxomas are best divided into the following 2 categories: those that arise in isolation and those that arise in the setting of a syndrome (so called Carney Complex). The former account for about 90% - 95% of cases, while the later account for a minority of cases and those arise from the right or left ventricle constitute as 3% each. Real-time two-dimensional echocardiography has proved to be extremely useful in defining intracavitary masses. With two-dimensional echocardiography accurate visualization of the right ventricular body and outflow tract can be accomplished consistently. The acoustic nature and anterior location of the right ventricular myxomas make them appear as bright, mobile masses. The mobile nature of the tumor can easily be appreciated and its point of attachment, or stalk can be visualized accurately. Background of this case illustrates the transthoracic 2D echocardiographic pattern of right ventricular myxoma and its attachment by a pedicle to the anterior papillary muscle, masquerading as ball-valve thrombus and cardiac “stone” in tilted parasternal long axis-3 chamber views in a 15-year-old girl. Mahaim criteria to distinguish myxoma from organizing thrombus had been highlighted.
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