864 research outputs found

    Portable Embedded Data Display and Control Unit using CAN Bus

    Get PDF
    AbstractThe development trend and research focus of control system is networked control. The Field Bus Control System (FCS) which is important segment in networked system is widely applied in control system. The CAN (Controller Area Network) bus which has strong fault tolerance, high reliability and low cost plays an important role in FCS. The CAN is a serial communication protocol which efficiently supports distributed real-time control with a very high level of security. Its domain of application ranges from high speed networks to low cost multiplex wiring. In automotive electronics, engine control units, sensors, anti-skid-systems, etc. are connected using CAN with bit rates up to 1M bit/s. This project is to develop an automatic monitor and control of any non-industrial process using a Portable Embedded data display and control unit based on CAN Bus. It is implemented by applying 16 bit RISC key microprocessor technique, embedded software technology, embedded GUI (Graphics User Interface) technology, CAN bus communication technology, information storage and management technology[6]. The Proposed system involves the CAN Protocol to communicate the data. The system consists of many nodes each comprising a PIC microcontroller and a sensor. The data is retrieved from the sensor and forwarded to a PIC microcontroller through a CAN transceiver. The PIC Microcontroller establishes connection with a CAN Protocol and process the sensor data and the data through the CAN Bus which is twisted pair of wires. Another PIC microcontroller at remote end is interfaced with LCD (Liquid Crystal Display) to view the sensor data and send back control signal to the sensor through CAN protocol. The research and development of this project was driven by robustness of CAN communication and its practicality of application

    Security and Privacy in Smart Farming: Challenges and Opportunities

    Get PDF
    Agriculture is basic source of livelihood of people in india. It plays major role in economy of country. But now a days due to migration of people from rural to urban there is hindrance in agriculture.Monitoring the environmental factor is not the complete solution to increase the yield of crops.There are number of factors that decrease the productivity to a great extent. Hence automation must be implemented in agriculture to overcome these problems.An automation Irrigation system there by saving time ,money and power of farmer.The traditional farm land irrigation techniques require manual intervention.With the automated technology of irrigation,the human intervention can be minimized.Continuous sensing and  monitoring of crops by convergence of sensors with Internet Of Things(IOT) and making farmers  aware about crops growth,harvest time periodically and in turn making high productivity of crops and also ensuring correct delivery of products to end,consumers at right place and right time. So to overcome this problem we go for smart agriculture  technique using IOT.This project includes sensors such as temperature,humidity,soil moisture for collection of field data and processed.These sensors are combined with well established web technology in the form of wireless sensor networks to remotely control and monitor data from the sensors.  &nbsp

    Identification of Novel QTLs for BPH Tolerance in Rice Using Resistant Donor BM 71

    Get PDF
    Rice is the most widely grown crop in the world, feeding half of the world’s population. Brown plant hopper (BPH) is a considerable risk to rice fields carrying 20-90% yield losses. Hopper burn can be effectively managed by the recognition and use of BPH genes. Marker based genetic analysis of 136 RILcollected from a high yielding susceptible variety, MTU 3626 and BM 71, a BPH donor developed at RARS, identified 3 minor novel QTLs viz; qmbph2.1,qmbph4.1 and qmbph12.1 on chromosomes 2, 4 and 12 and two other QTLson chromosome 5 and 7, namelyqmbph5.1 and qmbph7.1. The phenotyping of RIL’s revealed that ten RIL’s (2711 – 31, 2711 – 37, 2711 – 50, 2711 – 69, 2711 – 84, 2711 – 88, 2711 – 94, 2711 – 100, 2711 – 168 and 2711 – 191) recorded yields comparable to checks, Swarna and Pushyami along with BPH score similar to donor. The BPH resistance lines recognised will be further evaluated, and the confirmed lines can be employed in rice breeding programs

    Nanoscale Morphological and Chemical Changes of High Voltage Lithium–Manganese Rich NMC Composite Cathodes with Cycling

    Get PDF
    Understanding the evolution of chemical composition and morphology of battery materials during electrochemical cycling is fundamental to extending battery cycle life and ensuring safety. This is particularly true for the much debated high energy density (high voltage) lithium–manganese rich cathode material of composition Li1 + xM1 – xO2 (M = Mn, Co, Ni). In this study we combine full-field transmission X-ray microscopy (TXM) with X-ray absorption near edge structure (XANES) to spatially resolve changes in chemical phase, oxidation state, and morphology within a high voltage cathode having nominal composition Li1.2Mn0.525Ni0.175Co0.1O2. Nanoscale microscopy with chemical/elemental sensitivity provides direct quantitative visualization of the cathode, and insights into failure. Single-pixel (∼30 nm) TXM XANES revealed changes in Mn chemistry with cycling, possibly to a spinel conformation and likely including some Mn(II), starting at the particle surface and proceeding inward. Morphological analysis of the particles revealed, with high resolution and statistical sampling, that the majority of particles adopted nonspherical shapes after 200 cycles. Multiple-energy tomography showed a more homogeneous association of transition metals in the pristine particle, which segregate significantly with cycling. Depletion of transition metals at the cathode surface occurs after just one cycle, likely driven by electrochemical reactions at the surface

    Small optic suspensions for Advanced LIGO input optics and other precision optical experiments

    Get PDF
    We report on the design and performance of small optic suspensions developed to suppress seismic motion of out-of-cavity optics in the Input Optics subsystem of the Advanced LIGO interferometric gravitational wave detector. These compact single stage suspensions provide isolation in all six degrees of freedom of the optic, local sensing and actuation in three of them, and passive damping for the other three

    Evidence for weak antilocalization-weak localization crossover and metal-insulator transition in CaCu3_{3}Ru4_{4}O12_{12} thin films

    Full text link
    Artificial confinement of electrons by tailoring the layer thickness has turned out to be a powerful tool to harness control over competing phases in nano-layers of complex oxides. We investigate the effect of dimensionality on transport properties of dd-electron based heavy-fermion metal CaCu3_{3}Ru4_{4}O12_{12}. Transport behavior evolves from metallic to localized regime upon reducing thickness and a metal insulator transition is observed below 3 nm film thickness for which sheet resistance crosses h/e225 h/e^{2} \sim 25~kΩ\Omega, the quantum resistance in 2D. Magnetotransport study reveals a strong interplay between inelastic and spin-orbit scattering lengths upon reducing thickness, which results in weak antilocalization (WAL) to weak localization (WL) crossover in magnetoconductance.Comment: 10 pages, 4 figure

    The pressure-volume-temperature relationship of cellulose

    Get PDF
    Pressure–volume–temperature (PVT) mea- surements of a-cellulose with different water contents, were performed at temperatures from 25 to 180 °C and pressures from 19.6 to 196 MPa. PVT measurements allowed observation of the combined effects of pressure and temperature on the specific volume during cellulose thermo-compression. All isobars showed a decrease in cellulose specific volume with temperature. This densification is associated with a transition process of the cellulose, occurring at a temperature defined by the inflection point Tt of the isobar curve. Tt decreases from 110 to 40 °C with pressure and is lower as moisture content increases. For isobars obtained at high pressures and high moisture contents, after attaining a minimum, an increase in volume is observed with temperature that may be related to free water evaporation. PVT a-cellulose experimental data was compared with predicted values from a regression analysis of the Tait equations of state, usually applied to synthetic polymers. Good correla- tions were observed at low temperatures and low pressures. The densification observed from the PVT experimental data, at a temperature that decreases with pressure, could result from a sintering phenomenon, but more research is needed to actually understand the cohesion mechanism under these conditions

    Virtual Compton Scattering and the Generalized Polarizabilities of the Proton at Q^2=0.92 and 1.76 GeV^2

    Get PDF
    Virtual Compton Scattering (VCS) on the proton has been studied at Jefferson Lab using the exclusive photon electroproduction reaction (e p --> e p gamma). This paper gives a detailed account of the analysis which has led to the determination of the structure functions P_LL-P_TT/epsilon and P_LT, and the electric and magnetic generalized polarizabilities (GPs) alpha_E(Q^2) and beta_M(Q^2) at values of the four-momentum transfer squared Q^2= 0.92 and 1.76 GeV^2. These data, together with the results of VCS experiments at lower momenta, help building a coherent picture of the electric and magnetic GPs of the proton over the full measured Q^2-range, and point to their non-trivial behavior.Comment: version 2: modified according to PRC Editor's and Referee's recommendations. Archival paper for the E93-050 experiment at JLab Hall A. 28 pages, 23 figures, 5 cross-section tables. To be submitted to Phys.Rev.
    corecore