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Now showing items 1 - 16 of 586

  • IEEE RAS Member in the News: Vijay Kumar [Society News]

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  • System and method for monitoring fluid flow in a conduit

    This disclosure relates generally to a conduit 112 and more particularly to a system and method for monitoring fluid flow in the conduit 112. In one embodiment, a fluid monitoring device 100 for monitoring fluid flow in a conduit 112 is disclosed. The fluid monitoring device 100 comprises a depth camera 102 placed inside the conduit 112; a conveyor belt 104 placed in contact with a surface of a fluid 114 in the conduit 112; an indicator ball 106 placed in contact with the conveyor belt 104; and two image capturing devices 108 placed inside the conduit 112, wherein each of the two image capturing devices 108 are placed at an equal distance from the depth camera 102.
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  • Gimbal assembly with linear actuators that cause rotation of a slider

    A gimbal assembly includes a flex circuit with a first end extending along a loadbeam and second end having bond pads configured to be electrically coupled to a slider. The gimbal assembly includes a metallic layer with a fixed portion fixably attached to the loadbeam and a movable portion fixably attachable to the slider. The movable portion has at least one extension arm coupled to and providing support to the second end of the flex circuit. First and second linear actuators are coupled between the fixed portion and the movable portion. The first and second linear actuators cause a rotation of the slider in response to an electric signal.
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  • Electronic device for erasing contents on a writing board and a method thereof

    The present disclosure relates to an electronic device for erasing contents on a writing board. The electronic device comprises a motion detecting unit for detecting movement of the electronic device from resting position which then transmits an activation signal to activate a processing unit and a proximity sensor. The proximity sensor identifies proximity of the electronic device with the writing board. The processing unit receives a signal from the proximity sensor when the electronic device is proximal to the writing board. Further, the processing unit receives selection of colours through user interface on the electronic device for identifying erasable or retainable contents on the writing board. The processing unit transmits a control signal to motion control system to control moveable cleaning surface of the electronic device to perform either pulling or pushing the moveable cleaning surface backward or forward respectively based on the selection of colours.
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  • Method and system for determining sets of variant items

    Various embodiments of a method and system for determining sets of variant items are described. Various embodiments may include a system configured to generate multiple item pairs each corresponding to a particular item and another item determined to be similar to the particular item. For the particular item and the other item, each item pair may include a respective sequence of text strings (e.g., a title). For each item pair, the system may perform a corresponding text alignment and determine one or more misalignments of the item pair. The system may also assign a similarity score to each item pair; the similarity score may be dependent on the misalignment(s) determined for the particular item pair. Based on each aligned item pair and the similarity score assigned to that aligned item pair, the system may generate an indication specifying that each of a set of items are variants of each other.
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  • Preventing oversubscription to power resources in a computing system

    Preventing oversubscription to power resources in a computing system that includes a plurality of power supplies configured to deliver power to a plurality of integrated technology elements (‘ITEs’), including: detecting, by a power management module, that power delivery capabilities of the power supplies have changed; determining, by the power management module in dependence upon a power redundancy policy and the power delivery capabilities of the power supplies, power settings for the plurality of ITEs; and updating, by the power management module, power settings for the plurality of ITEs.
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  • Surface Modification of Textured Dielectrics and Their Wetting Behavior

    Vijay Kumar   Ajaypal Singh Dhillon…  

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  • Euglobulin-based method for determining the biological activity of defibrotide

    It is disclosed a method for determining the biological activity of defibrotide, which comprises the steps of: a) bringing into contact defibrotide, mammalian euglobulin and a substrate specific for the plasmin which, by reaction with the plasmin, provides a measurable product; and b) measuring the amount of product formed at successive times, to thereby determine the biological activity of the defibrotide. Liquid defibrotide formulations are also disclosed, preferably water solutions, having a defined biological activity and, in particular, having an activity of 25 to 35 IU/mg of defibrotide, preferably from 27.5 to 32.5 IU/mg and, more preferably, from 28 to 32 IU/mg.
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  • Effect of gamma irradiation on the properties of plastic bottle sheet

    Vijay Kumar   Yasir Ali   R.G. Sonkawade   A.S. Dhaliwal  

    In this article, the effects of gamma irradiation on the optical and structural properties of plastic bottle sheets have been studied. Bottle sheets were exposed with 1.25MeV 60Co gamma-ray's source at various dose levels within the range from 0 to 670kGy. The changes so induced were analyzed by using UV-Vis and X-ray diffraction spectroscopy. UV-Vis spectra show the peaks, their shifting and broadening as a result of gamma irradiation. With increasing gamma-dose, the values of the direct and indirect band gap are found to be decreased. These results are in good agreement with the corresponding results published previously for polyethylene terephthalate polymer. We also calculated numbers of carbon atoms per conjugation length. The X-ray diffraction spectra exhibited an increase in peak intensity after gamma irradiation. Furthermore, the percentage crystallinity and crystallite size for pristine and irradiated sample have been calculated. It has been found that both crystallinity and crystallite size increase due to irradiation. In addition, interchain distances, micro strain, inter planar distance, dislocation density and distortion parameters were calculated. The analysis revealed there is the significant decrease in micro strain, dislocation density and distortion parameters with an increase of gamma dose, which is in line with the crystallinity calculation. Moreover, Interchain and Interplanar distances were marginally changed. These results demonstrated the applicability of sheets as a cost-effective dosimeter. [All rights reserved Elsevier].
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  • Production of low calorie, extruded, expanded foods having a high fiber content

    Extruded, directly expanded, high fiber reduced calorie food products, such as a ready-to-eat (RTE) cereal or sweet or savory snack, are produced at high production rates without substantial loss of extrusion functionality and extrudability by replacing a substantial portion of at least one flour with a gelatinized, enzyme-resistant starch type III ingredient or bulking agent as a reduced-calorie, high fiber flour replacer. The resistant starch type III ingredient or bulking agent contains an enzyme-resistant starch type III having a melting point with an endothermic peak temperature of at least about 140° C., and may have a water-holding capacity of less than 3 grams water per gram of the starch-based bulking agent. The total dietary fiber retention of the gelatinized, starch-based bulking agent may be at least about 90% by weight after extrusion using a die temperature of least about 100° C., and a die pressure of at least about 150 psig.
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  • On ideal convergence of double sequences in probabilistic normed spaces

    Vijay Kumar   Bernardo Lafuerza-Guillén  

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  • Apparatus and method for separating and isolating components of a biological fluid

    A device for separating and isolating components of a biological fluid comprising a container for containing the fluid to be processed, a tube cap assembly for dosing the container while providing filling and extraction communication therewith, a float assembly disposed within the container for funneling and controlling biological fluid flow into an inverted domed shaped isolation chamber within the float and controlling the biological fluid flow out of the isolation chamber for effecting an encapsulation or a sealed isolation of at least one component or fraction of the biological fluid flow within the isolation chamber during a centrifugation process. The device further comprising a flexible tube for connecting an extraction passageway disposed within the float assembly and an extraction valve of the tube cap assembly for allowing extraction of at least the one component or fraction encapsulated or isolated within the chamber.
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  • SWARMS: Scalable sWarms of Autonomous Robots and Mobile Sensors

    Vijay Kumar   Francesco Bullo   Daniel Koditschek  

    The SWARMS project brings together experts in artificial intelligence, control theory, robotics, systems engineering and biology with the goal of understanding swarming behaviors in nature and applications of biologically-inspired models of swarm behaviors to large networked groups of autonomous vehicles. The main goal is to develop a framework and methodology for the analysis of swarming behavior in biology and the synthesis of bio-inspired swarming behaviors for engineered systems. We are interested in such questions as: Can large numbers of autonomously functioning vehicles be reliably deployed in the form of a "swarm" to carry out a prescribed mission and to respond as a group to high-level management commands Can such a group successfully function without a designated leader, with limited communications between its members, and with dynamically changing "roles" for its members Is there a hierarchy of "compatible" models appropriate to swarming/schooling/flocking which is rich enough to explain these behaviors at various "resolutions" ranging from aggregate characterizations of emergent behavior to detailed descriptions which model individual vehicle dynamics?
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  • Contribution of traceability towards attaining sustainability in the textile sector

    Vijay Kumar   Tarun Kumar Agrawal   Lichuan Wang…  

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  • Peer facilitated writing groups: a programmatic approach to doctoral student writing

    Vijay Kumar   Claire Aitchison  

    Very few empirical studies have investigated programmes in which doctoral students act as peer facilitators in faculty writing groups. We report on the development of a centrally delivered doctoral student writing programme in which twenty student participants were mentored and provided with the resources to initiate their own faculty-based doctoral writing groups. ‘Legitimate peripheral participation’ was used as a conceptual lens to interpret the data collected during the establishment and evaluation of the programme. All student participants in the preparatory training course, which was developed in consultation with postgraduate students and research supervisors, went on to become doctoral writing peer facilitators of peer writing groups. Insights from seven of these showed how a well-structured and supportive programme harnessed the benefits of peer learning by bringing personal rewards to participants and building institutional capacity around doctoral research writing literacies.
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  • Donor-acceptor fluorene scaffolds: a process and uses thereof

    The present invention relates to novel donor-acceptor fluorene compounds, which can be used as for the fabrication of electroluminescent devices, and a process of preparing said novel compounds. More particularly, the present invention relates to amine donor and nitrile/ester acceptor fluorenes, fluorenones their π-conjugated systems and related compounds, processes for preparing the said compounds including oxidation of fluorenes to corresponding fluorenones and their use in preparing organic electronic devices such as organic light emitting diodes (OLEDs), photovoltaic/solar cell, Field effect transistors and other useful electroluminescent devices. The compounds are prepared by reacting 2H-pyran-2-ones in isolated or rigid conformations with cyclic ketones containing methylene carbonyl moiety in the presence of a base in an organic solvent. The present invention also relates to a new concept and approach to overcome the problem of ‘Green emission defect’ in 9-unsubstituted fluorene-based organic light emitting diodes which occurs due to the conversion of fluorenes to fluorenones that show emission mainly in green-yellow region. In the present invention we have placed donor-acceptor substituents in such a way that donor-acceptor fluorenones show emission in the blue region (instead of green-yellow region) thus improving the blue color purity and overcoming the problem of green emission defect.
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