36,419 research outputs found
Unsupervised Classification of Intrusive Igneous Rock Thin Section Images using Edge Detection and Colour Analysis
Classification of rocks is one of the fundamental tasks in a geological
study. The process requires a human expert to examine sampled thin section
images under a microscope. In this study, we propose a method that uses
microscope automation, digital image acquisition, edge detection and colour
analysis (histogram). We collected 60 digital images from 20 standard thin
sections using a digital camera mounted on a conventional microscope. Each
image is partitioned into a finite number of cells that form a grid structure.
Edge and colour profile of pixels inside each cell determine its
classification. The individual cells then determine the thin section image
classification via a majority voting scheme. Our method yielded successful
results as high as 90% to 100% precision.Comment: To appear in 2017 IEEE International Conference On Signal and Image
Processing Application
Bidentate N,O-prolinate ruthenium benzylidene catalyst highly active in RCM of disubstituted dienes
The synthesis of a bidentate N,O-prolinate ruthenium benzylidene from commercially available starting materials and its activity in ring-closing metathesis of functionalized disubstituted dienes at 30 °C is disclosed
Proceedings of the African Diaspora Conference on Sustainable Development
The authors urge the Western donor organizations to facilitate and support the take up of such more sustainable models
Unlocking water markets: an experimental approach
water market, experiments, resource economies, Marketing, Resource /Energy Economics and Policy,
On-board processing satellite network architecture and control study
For satellites to remain a vital part of future national and international communications, system concepts that use their inherent advantages to the fullest must be created. Network architectures that take maximum advantage of satellites equipped with onboard processing are explored. Satellite generations must accommodate various services for which satellites constitute the preferred vehicle of delivery. Such services tend to be those that are widely dispersed and present thin to medium loads to the system. Typical systems considered are thin and medium route telephony, maritime, land and aeronautical radio, VSAT data, low bit rate video teleconferencing, and high bit rate broadcast of high definition video. Delivery of services by TDMA and FDMA multiplexing techniques and combinations of the two for individual and mixed service types are studied. The possibilities offered by onboard circuit switched and packet switched architectures are examined and the results strongly support a preference for the latter. A detailed design architecture encompassing the onboard packet switch and its control, the related demand assigned TDMA burst structures, and destination packet protocols for routing traffic are presented. Fundamental onboard hardware requirements comprising speed, memory size, chip count, and power are estimated. The study concludes with identification of key enabling technologies and identifies a plan to develop a POC model
Semi-leptonic (1968) decays as a scalar meson probe
The unusual multiplet structures associated with the light spin zero mesons
have recently attracted a good deal of theoretical attention. Here we discuss
some aspects associated with the possibility of getting new experimental
information on this topic from semi-leptonic decays of heavy charged mesons
into an isosinglet scalar or pseudoscalar plus leptons.Comment: 11 pages, 4 figure
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