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Search Results: 1 - 10 of 223816 matches for " R. Seethalakshmi "
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Classifier in Age classification
B. Santhi,R. Seethalakshmi
Research Journal of Applied Sciences, Engineering and Technology , 2012,
Abstract: Face is the important feature of the human beings. We can derive various properties of a human by analyzing the face. The objective of the study is to design a classifier for age using facial images. Age classification is essential in many applications like crime detection, employment and face detection. The proposed algorithm contains four phases: preprocessing, feature extraction, feature selection and classification. The classification employs two class labels namely child and Old. This study addresses the limitations in the existing classifiers, as it uses the Grey Level Co-occurrence Matrix (GLCM) for feature extraction and Support Vector Machine (SVM) for classification. This improves the accuracy of the classification as it outperforms the existing methods.
An Enhanced Model for Content Based Video Retrieval
P Seethalakshmi,V. Ramachandran,R. Pandian
Asian Journal of Information Technology , 2012,
Abstract: The main objective of this paper is to propose a content based video retrieval model for effective and efficient retrieval of video. The proposed model integrates the temporal and spatial features of video using motion activity descriptors and dominant color descriptors. The motion intensity and color descriptors that are MPEG-7 standardized are combined for the indexing and retrieval of video. The motion descriptor is computed from P frames of video and the dominant colors are also computed for that frame as a descriptor. Integrating dominant color descriptor with motion descriptors achieves a better retrieval of video.
TTSS Packet Classification Algorithm to enhance Multimedia Applications in Network Processor based Router
R. Avudaiammal,R. SivaSubramanian,R. Pandian,P. Seethalakshmi
Computer Science , 2009,
Abstract: The objective of this paper is to implement the Trie based Tuple Space Search(TTSS) packet classification algorithm for Network Processor(NP) based router to enhance multimedia applications. The performance is evaluated using Intel IXP2400 NP Simulator. The results demonstrate that, TTSS has better performance than Tuple Space Search algorithm and is well suited to achieve high speed packet classification to support multimedia applications.
Efficient Bandwidth Management Using Embedded Network Processor for Quality Distribution of Multimedia Over Mobile Networks
Asian Journal of Information Technology , 2012,
Abstract: The main objective of this study is to implement an embedded bandwidth manager using network processor to improve the quality distribution of multimedia streams to internet enabled mobile clients. In this paper the bandwidth requirement for each media stream in mobile applications is converted into channel time requirement for that stream. The embedded bandwidth manager allots for each stream a share of channel time depending on its requirement relative to other flows and the stream accordingly regulates its packet transmission. As bandwidth and traffic characteristics of various flows in the network change, the channel time proportion allotted to the individual streams by the bandwidth manager varies dynamically providing minimum bandwidth requirements for each stream. Utilizing the high performance parallel processing features of network processor, the admission control and dynamic bandwidth management functions are implemented on the Intel IXP1200 network processor simulator. The six micro engines with four hardware threads for each are utilized for the modules Ingress classification, flow establishment, flow teardown, flow renegotiation, packet generation and dispatching. As these modules are processed in parallel, the quality distribution of multimedia over mobile networks is enhanced.
A Distributed Control System for Spatial Hyper Redundant Robot using CAN
N. Kiranmayee,R. Seethalakshmi,Jobby C. Johnson,Joel Jose
Journal of Artificial Intelligence , 2012,
Abstract: Spatial Hyper Redundant (SHR) robot has more controllable DOF than actual DOF due to hyper redundancy. The robot has increased dexterity and is well known for its use in unstructured environments. Due to higher controllable DOF, control system becomes extremely complex to implement. Hence, to develop the same, Controller Area Network (CAN) protocol which enables lesser number of bus signals and quite suitable in an environment where large number of microprocessor based systems are employed is used. In this case, stepper motors are used to actuate the links. This research involves in design of control system for an 8 link snake like robot using CAN protocol. A node consists of a microcontroller, CAN controller, CAN transceiver and a physical medium for transmission. A PIC 18F458 is chosen as the microcontroller which has inbuilt CAN module and it is programmed using CCS compiler for the application. The CAN communication was established by sending data from one node to other for physically actuating motions of links at its initial phase and then it was extended for multiple nodes with one node as master interfaced to GUI using RS232 on one side and to other nodes through CAN. Implementation of message filtering was done for each node. Performance of the system was also studied for multiple nodes of the system.
Regional brain metabolism in schizophrenia: The influence of antipsychotics
Seethalakshmi R,Parkar S,Nair N,Batra S
Journal of Postgraduate Medicine , 2007,
Abstract: Background: Schizophrenia has been associated with a plethora of metabolic changes in the brain that vary with duration and type of psychoses. Additionally, it has been observed that antipsychotics can further alter cerebral glucose metabolism. These changes resulting from antipsychotics have been postulated to be reflective of the duration and mechanism of action of the medication. Aims: We aimed to examine the influence of antipsychotics on brain metabolism in individuals with schizophrenia in a naturalistic setting. Settings and Design: A cross-sectional study was carried out by the psychiatry department of a tertiary care hospital in collaboration with the Radiation Medicine Centre. Materials and Methods: Eighteen male patients with schizophrenia in different phases of treatment underwent an 18F-deoxyglucose positron emission tomography scan in a resting state 12 hours after the last dose of antipsychotic. Statistical Analysis: The types and duration of treatment were then compared with the regional glucose uptake in 14 predetermined regions of interest. The relative Uptake Values were further compared using SPSS 11.0. Results: An immediate increase followed by a decrease in cortical uptake was noted while the basal ganglia uptake remained high, albeit with a decreasing trend. Typical antipsychotics were associated with lower frontal cortical and higher basal ganglia and cerebellar uptake as compared to atypical antipsychotics. Conclusion: The differential influence of the type and duration of antipsychotic on glucose uptake suggests a possible trend towards long-term side effects with typical medications that were not noted on clinical examination. This however needs to be confirmed with larger, controlled studies.
Journal of Theoretical and Applied Information Technology , 2011,
Abstract: The introduction of pervasive devices and mobile devices has led to immense growth of real time distributed processing. In such context reliability of the computing environment is very important. Reliability is the probability that the devices, links, processes, programs and files work efficiently for the specified period of time and in the specified condition. Distributed systems are available as conventional ring networks, clusters and agent based systems. Reliability of such systems is focused. These networks are heterogeneous and scalable in nature. There are several factors, which are to be considered for reliability estimation. These include the application related factors like algorithms, data-set sizes, memory usage pattern, input-output, communication patterns, task granularity and load-balancing. It also includes the hardware related factors like processor architecture, memory hierarchy, input-output configuration and network. The software related factors concerning reliability are operating systems, compiler, communication protocols, libraries and preprocessor performance. In estimating the reliability of a system, the performance estimation is an important aspect. Reliability analysis is approached using probability.
Balasubramanian Thiagarajan,Seethalakshmi Narasiman
Otolaryngology Online Journal , 2012,
Abstract: Hypoplasia of maxillary sinus is a rather rare condition. Review of literature reveal that so far only 6 cases have been reported. Hypoplasia of frontal and sphenoid sinuses has beendocumented rather frequently. In this article the authors report two rare cases of hypoplasia involving all paranasal sinuses which has not been reported so far in literature. This is actuallyan incidental finding when routine CT scan of sinuses was performed. This patient was clinically asymptomatic. Awareness of this condition is important because of implications involved in performing FESS surgery in these patients. Routine x-rays will lead to erroneousdiagnosis of sinus infection because of the opacity seen in the poorly developed sinus area.
A Frame work for improvising Service of Multimedia Applications in Mobile Networks
Bhuvaneswari Mariappan,Seethalakshmi Pandian
International Journal of Multimedia & Its Applications , 2011,
Abstract: The main objective of this paper is to propose a frame work for improvising the service of multimedia applications in mobile networks. The framework has been proposed with a Cross-Layer Manager (CLM) and a Cross-Layer Coordinator (CLC) for improvising of multimedia applications by dynamically adapting the bandwidth under prevailing channel conditions. Cross-Layer coordination among Application, MAC and Physical layer has been achieved along with bandwidth adaptation that improvises the Quality of Experience (QoE) of multimedia applications. The performance of the framework has been tested using GloMoSim and the results for the proposed framework under different scenarios show an improvement of 16% in throughput. It is also observed that our framework provides 5% improvement in multimedia service when compared with the cellular system containing only homogeneous traffic calls.
Jaya Jacob,V. Seethalakshmi
International Journal of Advances in Engineering and Technology , 2012,
Abstract: MANET (Mobile Adhoc Network) is a self organizing and self configuring network without the need of any centralized base station. In MANETs, the nodes are mobile and battery operated. As the nodes have limited battery resources and multi hop routes are used over a changing network environment due to node mobility, it requires energy efficient routing protocols to limit the power consumption, prolong the battery life and to improve the robustness of the system. This paper evaluates the performance of various adhoc routing protocols such as DSDV, AODV, DSR, TORA and AOMDV in terms of energy efficiency and it also proposes a new routing algorithm that modifies AOMDV and it provides better performance compared to all the above protocols. Simulation is done using NS-2(version NS-2.34).
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