1,952 research outputs found

    SSI Routing Scheme for Heterogeneous MANETs

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    Studies towards heterogeneous Mobile Adhoc Network (MANET) as well as inter-domain routing is still in much infancy stage. After reviewing the existing literaturs, it was found that problems associated with scalability, interoperability, and security is not defined up to the mark as it should be part of pervasive computing in future networks. Moreover, it was found that existing studies do not consider the complexities associated with heterogeneous MANET to a large extent leading to narrowed research scope. Hence, this paper introduces a novel scheme called as Secure, Scalable and Interoperable (SSI )routing, where a joint algorithm is designed, developed, and implemented. The outcome exhibits the correctness of this scheme by simulation assisted by analysis for inter-domain routing

    Power Flow Control and Current Ripple Minimization of HVDC Converter System by Using Zero-Sequence Voltage Injection Control

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    This paper introduces the Zero_Sequence Voltage_Injection(ZSVI) based Model Predictive_Control (MPC) to minimize the ripples in dc current & voltage and concurrently regulate the power_flow & dc_current. This paper takes the benefits to calculate and inject best possible zero_sequence_voltage_components to Parallel_Hybrid Modular Multilevel_Converter (PHMMC) dc bus voltage. Dc line current has been derived by discrete_time_dynamic model and also it expands the predictive_model. Required amount of zero sequence voltage is injected to reference voltage of dc bus by using predictive model. Compared to triplen_harmonic injection_method, the proposed scheme improves the PHMMC_performance by minimizing the ripples of dc_voltage ¤t. Execution of the proposed methodology of PHMMC-based HVDC system is done using SIMULINK/MATLAB

    Note on a fishery of Parapenaeus longipes along the Veraval Coast

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    Parapenaeus longipes, commonly known as “Flamingo shrimp” and locally as “Bhoonsi”,it is not known to occur exclusively as fishery in any area of India and abroad

    Stranding of Sei whale Balaenoptera borealis (Lesson) at Jaffarabad coast.

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    Balaenoptera borealis (Lesson) was stranded at Jaffrabad on the third week of Sep. 03. The carcass was highly decomposed. As no injury was noticed , it can be presumed that mortality might have occurred due to natural causes in the mid sea, after which it was washed ashore

    Record size of Oriental sole (Euryglossa orientalis) (Bloch & Schneider, 1801), caught off Nawabunder, Gujarat

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    E. orientalis largest ever recorded oriental sole landed in Nawabunder Fishing Harbour in Gujarat caught by Dol net

    Teacher-Student Interactions and Science Classroom Learning Environments in India

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    The research reported in this thesis is an in-depth study of teacher-student interactions and science classroom learning environments in Jammu, India. Jammu city is the winter capital of the state of Jammu and Kashmir, situated at the extreme north of India. This is the first time that any learning environment research has been conducted and reported from this part of the world. The objective of this research was to provide further validation information about two already existing learning environment instruments with Indian students and describe, discuss and analyse information on the associations between student’s perceptions of learning environment and their attitudes and cognitive achievements. Differences in the perceptions of different groups namely gender, religious and cultural were also investigated. The present study commenced with a more positivistic framework, with an aim of providing a large-scale quantitative overview. The Questionnaire on Teacher Interaction (QTI), the What is Happening in this Class? (WIHIC) and an Attitude Scale were administered to 1,021 students from 32 science classes in seven different co-educational private schools in Jammu. The data were analysed to determine the reliability, validity and mean of each scale. Students were interviewed to determine further the reliability of the questionnaires, in addition to providing information that might explain the QTI and WIHIC mean scale scores. As a result of critical reflection, the study moved towards a more interpretative framework, drawing on elements of the constructivist and critical theory paradigms. Multiple research methods were used to member and deepen the researchers understanding of the learning environments in Jammu. An educational critique was used to describe the social and cultural factors that could influence the prevailing learning environments

    Bumper landings of Arius dussumieri at Nawabundar.

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    Marine catfish production showed a continuously declining trend all along the Indian coast, heavy landings of A. dussumieri has been recorded at Nawabundar landing centre. Black tip sea catfish locally known as "Khaga" forms an important seasonal fishery in the Dol nets operated at Nawabundar, contributing 5 to 16% of total fish catch with the annual Estimated catch (tonnes) & Effort of A. dussumieri landed at Nawabundar

    Bound States of String Networks and D-branes

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    We show the existence of non-threshold bound states of (p, q) string networks and D3-branes, preserving 1/4 of the full type IIB supersymmetry, interpreted as string networks dissolved in D3-branes. We also write down the expression for the mass density of the system and discuss the extension of the construction to other Dp-branes. Differences in our construction of string networks with the ones interpreted as dyons in N=4 gauge theories are also pointed out.Comment: 11 pages, latex, minor modifications (version to appear in Phys. Rev. Lett.
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