354,876 research outputs found
Cell attachment on ion implanted titanium surface
No full textOf outmost importance for the successful use of an implant is a good adhesion of the surrounding tissue to\ud
the biomaterial. In addition to the surface composition of the implant, the surface topography also influences\ud
the properties of the adherent cells. In the present investigation, ion implanted and untreated surfaces were\ud
compared for cell adhesion and spreading. The surface topography of the surfaces were analyzed using AFM\ud
and the cell studies with SEM. The results of our present investigation is indicative of the fact that ion\ud
implanted titanium surface offer better cell binding affinity compared to untreated/polished surface
Economies of Size in Idaho County Governments
No full textBulletin no. 751 Moscow, Idaho :University of Idaho, College of Agriculture, Agriculture Experiment Station, 1993-02-01. Author(s): Upadhyaya, Mukund Prasad; Long, Roger B
A finite element analysis of the hydrodynamic performance of 3- and 4-Fin surfboard configurations
No full textThis study investigates the hydrodynamic performance of three and four fin surfboard configurations using the CFD/CFX approach. CFD models of three and four fin configurations were setup inside a rectangular domain using CFX meshing. Comparisons of performance were evaluated by analysing both lift and drag coefficients for each fin system as a function of the angle of incidence at various speeds. The 2-equation k-epsilon (k-ε) turbulence model was used as the base for simulations of flow velocities of 3, 5, 7 and 10 m/s. In addition the 7-equation Reynolds stress (RSM) turbulence model was also employed for flow velocities of 10 and 25m/s in order to compare the predictions of the k-ε turbulence model. Results demonstrated that the maximum lift for the three fin configuration occurred at a smaller angle of incidence than for the four fin design. However, the magnitude of maximum lift was the same for both designs under the operating conditions considered in this study. The results from this investigation imply that if a surfer desires a greater degree of manoeuvrability (ideal in regular surfing), then the three fin configuration would be more appropriate in comparison to the four fin configuration. This is because the three fin design is more efficient at generating lift during smaller angles of attack compared to the four fin design. However if stability and speed in the surfboard is preferred (favourable in big wave surfing), then the four fin configuration would be more suitable owing to less lift and drag at smaller incidence angles
International spillovers: real and financial channels
No full textApresentação do palestrante Eswar S. Prasad - Cornell University no contexto do evento "3rd Global Conference - Business Cycles". Mais informações em:
Experimental studies on the curing of alternate un-reinforced mould materials using microwave heating
No full textThere is an increasing interest of using microwave technology for curing resins. The heating of the epoxy resins greatly relies on various factors which includes the dielectric properties, kind of waveguide used and the frequency and power used. The majority of curing via microwaves were normally performed on epoxy resins like diglycidyl ether of bisphenol-A (DGEBA) with hardeners like 4,4’ diaminodiphenylmethane (DDM). This paper investigates the experimental use of materials such as Casting Resin ADR 2512, High Temperature Resin ADR 2515 and Laminating Resin GPR 2516. Two high temperature hardeners were used together with the resins, mainly ADH 2403 and ADH 2409. Microwave curing resulted in a shorter curing time to reach the maximum percentage cure. Two moulding techniques were studied, mainly curing by placing the mould in the cavity or by preheating the resins prior to pouring the resin into the mould. By preheating the resin, it decreases gel time and improves production rates
RF Information Harvesting for Medium Access in Event-driven Batteryless Sensing
Get PDFWe present radio-frequency (RF) information harvesting, a chan-nel sensing technique that takes advantage of the energy in the wireless medium to detect channel activity at essentially no en-ergy cost. RF information harvesting is essential for event-driven wireless sensing applications using battery-less devices that har-vest tiny amounts of energy from impromptu events, such as op-erating a switch, and then transmit the event notification to a one-hop gateway. As multiple such devices may concurrently de-tect events, coordinating access to the channel is key. RF infor-mation harvesting allows devices to break the symmetry between concurrently-transmitting devices based on the harvested energy from the ongoing transmissions. To demonstrate the benefits of RF information harvesting, we integrate it in a tailor-made ultra low-power hardware MAC protocol we call Radio Frequency-Distance Packet Queuing (RF-DiPaQ). We build a hardware/software proto-type of RF-DiPaQ and use an established Markov framework to study its performance at scale. Comparing RF-DiPaQ against sta-ple contention-based MAC protocols, we show that it outperforms pure Aloha and 1-CSMA by factors of 3.55 and 1.21 respectively in throughput, while it saturates at more than double the offered load compared to 1-CSMA. As traffic increases, the energy saving of RF-DiPaQ against CSMA protocols increases, consuming 36% less energy than np-CSMA at typical offered loads.Green Open Access added to TU Delft Institutional Repository 'You share, we take care!' - Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.Embedded System
Livestock production and climate change CABI climate change series ;, 6./ edited by P.K. Malik, R. Bhatta, J. Takahashi, R.A. Kohn, C.S. Prasad.
No full textIncludes bibliographical references and index.In a changing climate, livestock production is expected to exhibit dual roles of mitigation and adaptation in order to meet the challenge of food security. This book approaches the issues of livestock production and climate change through three sections: I. Livestock production, II. Climate change and, III. Enteric methane amelioration. Section I addresses issues of feed quality and availability, abiotic stress (heat and nutritional) and strategies for alleviation, livestock generated nitrogen and phosphorus pollution, and approaches for harnessing the complex gut microbial diversity. Section.Overview / C.S. Prasad, P.K. Malik and R. Bhatta -- Feed Resources vis-à-vis Livestock and Fish Productivity in a Changing Climate / Michael Blümmel, Amare Haileslassie, Mario Herrero, Malcolm Beveridge, Michael Phillips and Petr Havlik -- Strategies for Alleviating Abiotic Stress in Livestock / V. Sejian, Iqbal Hyder, P.K. Malik, N.M. Soren, A. Mech, A. Mishra and J.P. Ravindra -- Nitrogen Emissions from Animal Agricultural Systems and Strategies to Protect the Environment / Richard A. Kohn -- Nutritional Strategies for Minimizing Phosphorus Pollution from the Livestock Industry / P.P. Ray and K.F. Knowlton -- Metagenomic Approaches in Harnessing Gut Microbial Diversity / A. Thulasi, Lyju Jose, M. Chandrasekharaiah, D. Rajendran and C.S. Prasad -- Proteomics in Studying the Molecular Mechanism of Fibre Degradation / N.K. Singh -- Perspective on Livestock-Generated GHGs and Climate / J. Takahashi -- Carbon Footprints of Food of Animal Origin / Gerhard Flachowsky -- Carbon Sequestration and Animal-Agriculture : Relevance and Strategies to Cope with Climate Change / C. Devendra -- Climate Change : Impacts on Livestock Diversity in Tropical Countries / S. Banik, P.K. Pankaj and S. Naskar -- Climate Change : Effects on Animal Reproduction / Jyotirmoy Ghosh, Sujoy K. Dhara and P.K. Malik -- Climate Change : Impact of Meat Production / Levi Mugalavai Musalia -- Indigenous Livestock Resources in a Changing Climate : Indian Perspective / S.P.S. Ahlawat, Pushpendra Kumar, Kush Shrivastava and N.R. Sahoo -- Enteric Methane Emission : Status, Mitigation and Future Challenges -- An Indian Perspective / Raghavendra Bhatta, P.K. Malik and C.S. Prasad -- Thermodynamic and Kinetic Control of Methane Emissions from Ruminants / Richard A. Kohn -- Ionophores : A Tool for Improving Ruminant Production and Reducing Environmental Impact / Natasha Bell, Tryon Wickersham, Vijay Sharma and Todd Callaway -- Residual Feed Intake and Breeding Approaches for Enteric Methane Mitigation / D.P. Berry, J. Lassen and Y. de Haas -- Acetogenesis as an Alternative to Methanogenesis in the Rumen / Emma J. Gagen, Stuart E. Denman and Christopher S. McSweeney -- Immunization and Tannins in Livestock Enteric Methane Amelioration / Yutaka Uyeno -- Phage Therapy in Livestock Methane Amelioration / Rosalind A. Gilbert, Diane Ouwerkerk and Athol V. Klieve -- Feed-based Approaches in Enteric Methane Amelioration / P.K. Malik, R. Bhatta, N.M. Soren, V. Sejian, A. Mech, K.S. Prasad and C.S. Prasad -- Methanotrophs in Enteric Methane Mitigation / N.M. Soren, P.K. Malik and V. Sejian -- Summary / P.K. Malik, R. Bhatta, M. Saravanan and L. Baruah.1 online resource (xi, 395 pages)
Screen Printed Graphene Oxide Textile Biosensor for Applications in Inexpensive and Wearable Point-of-Exposure Detection of Influenza for At-Risk Populations
No full textA textile screen-printed biosensor was developed using silver conductive electrodes and graphene oxide transduction film built upon both nanoporous polyamide and consumer utility textiles for the detection of environmental exposure to influenza A virus. An affinity assay was constructed upon the graphene oxide layer to introduce influenza protein-specific antibodies to the sensor surface. Validation of fabrication reproducibility and stability, as well as affinity assay stability, was conducted using electrochemical impedance spectroscopy. The textile sensor was utilized for the detection of influenza A in biofluid analog buffer. Its linear dynamic range was from 10 ng/mL to 10 µg/mL with a limit of detection of 10 ng/mL, spanning both pre- and post-symptomatic ranges. The sensor can be integrated into common textiles and worn by at-risk populations to detect exposure to the virus before symptoms manifest. If integrated with Internet-of-Things reporting platforms, this sensor could have the ability to predict potential influenza outbreaks before broad symptoms manifest, reducing the physical and economic burden of the disease. © The Author(s) 2018.Erik Jonsson School of Engineering and Computer Scienc
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