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https://www.readbyqxmd.com/read/28445417/ins-gnss-integration-for-aerobatic-flight-applications-and-aircraft-motion-surveying
#1
Edgar L V Hinüber, Christian Reimer, Tim Schneider, Michael Stock
This paper presents field tests of challenging flight applications obtained with a new family of lightweight low-power INS/GNSS (inertial navigation system/global satellite navigation system) solutions based on MEMS (micro-electro-mechanical- sensor) machined sensors, being used for UAV (unmanned aerial vehicle) navigation and control as well as for aircraft motion dynamics analysis and trajectory surveying. One key is a 42+ state extended Kalman-filter-based powerful data fusion, which also allows the estimation and correction of parameters that are typically affected by sensor aging, especially when applying MEMS-based inertial sensors, and which is not yet deeply considered in the literature...
April 26, 2017: Sensors
https://www.readbyqxmd.com/read/28409808/aircraft-navigation-grade-laser-driven-fog-with-gaussian-noise-phase-modulation
#2
Jacob Chamoun, Michel J F Digonnet
A laser-driven fiber optic gyroscope (FOG) is demonstrated with an angular random walk noise of 5.5×10<sup>-4</sup>  deg/√h, a drift of 6.8×10<sup>-3</sup>  deg/h, and an inferred scale-factor stability of 0.15 ppm, making it, to the best of our knowledge, the first laser-driven FOG to satisfy the performance requirements for inertial navigation of commercial aircraft. This is achieved using Gaussian white noise phase modulation to broaden the linewidth of the source laser and to strongly suppress the narrow-linewidth optical carrier...
April 15, 2017: Optics Letters
https://www.readbyqxmd.com/read/28386426/celestial-polarization-patterns-sufficient-for-viking-navigation-with-the-naked-eye-detectability-of-haidinger-s-brushes-on-the-sky-versus-meteorological-conditions
#3
Gábor Horváth, Péter Takács, Balázs Kretzer, Szilvia Szilasi, Dénes Száz, Alexandra Farkas, András Barta
If a human looks at the clear blue sky from which light with high enough degree of polarization d originates, an 8-shaped bowtie-like figure, the yellow Haidinger's brush can be perceived, the long axis of which points towards the sun. A band of high d arcs across the sky at 90° from the sun. A person can pick two points on that band, observe the yellow brushes and triangulate the position of the sun based on the orientation of the two observed brushes. This method has been suggested to have been used on the open sea by Viking navigators to determine the position of the invisible sun occluded by cloud or fog...
February 2017: Royal Society Open Science
https://www.readbyqxmd.com/read/28386197/a-resource-sharing-model-based-on-a-repeated-game-in-fog-computing
#4
Yan Sun, Nan Zhang
With the rapid development of cloud computing techniques, the number of users is undergoing exponential growth. It is difficult for traditional data centers to perform many tasks in real time because of the limited bandwidth of resources. The concept of fog computing is proposed to support traditional cloud computing and to provide cloud services. In fog computing, the resource pool is composed of sporadic distributed resources that are more flexible and movable than a traditional data center. In this paper, we propose a fog computing structure and present a crowd-funding algorithm to integrate spare resources in the network...
March 2017: Saudi Journal of Biological Sciences
https://www.readbyqxmd.com/read/28382420/cerebellar-theta-burst-stimulation-does-not-improve-freezing-of-gait-in-patients-with-parkinson-s-disease
#5
Arno M Janssen, Moniek A M Munneke, Jorik Nonnekes, Thomas van der Kraan, Alice Nieuwboer, Ivan Toni, Anke H Snijders, Bastiaan R Bloem, Dick F Stegeman
Freezing of gait (FOG) in Parkinson's disease (PD) likely results from dysfunction within a complex neural gait circuitry involving multiple brain regions. Herein, cerebellar activity is increased in patients compared to healthy subjects. This cerebellar involvement has been proposed to be compensatory. We hypothesized that patients with FOG would have a reduced ability to recruit the cerebellum to compensate for dysfunction in other brain areas. In this study cerebellar activity was modified unilaterally by either excitatory or inhibitory theta burst stimulation (TBS), applied during two separate sessions...
April 5, 2017: Journal of Neurology
https://www.readbyqxmd.com/read/28379705/karmitoxin-an-amine-containing-polyhydroxy-polyene-toxin-from-the-marine-dinoflagellate-karlodinium-armiger
#6
Silas Anselm Rasmussen, Sofie Bjørnholt Binzer, Casper Hoeck, Sebastian Meier, Livia Soman de Medeiros, Nikolaj Gedsted Andersen, Allen Place, Kristian Fog Nielsen, Per Juel Hansen, Thomas Ostenfeld Larsen
Marine algae from the genus Karlodinium are known to be involved in fish-killing events worldwide. Here we report for the first time the chemistry and bioactivity of a natural product from the newly described mixotrophic dinoflagellate Karlodinium armiger. Our work describes the isolation and structural characterization of a new polyhydroxy-polyene named karmitoxin. The structure elucidation work was facilitated by use of (13)C enrichment and high-field 2D NMR spectroscopy, where (1)H-(13)C long-range correlations turned out to be very informative...
April 5, 2017: Journal of Natural Products
https://www.readbyqxmd.com/read/28376632/mammographic-density-as-a-risk-factor-to-go-out-of-a-30-year-fog
#7
Catherine Colin, Anne-Marie Schott-Pethelaz
No abstract text is available yet for this article.
January 1, 2017: Acta Radiologica
https://www.readbyqxmd.com/read/28375273/analysis-of-fiber-optic-gyroscope-vibration-error-based-on-improved-local-mean-decomposition-and-kernel-principal-component-analysis
#8
Rui Song, Xiyuan Chen
The fiber optic gyroscope (FOG), one version of an all solid-state rotation sensor, has been widely used in navigation and position applications. However, the elastic-optic effect of fiber will introduce a non-negligible error in the output of FOG in a vibration and shock environment. To overcome the limitations of mechanism structure improvement methods and the traditional nonlinear analysis approaches, a hybrid algorithm of an optimized local mean decomposition-kernel principal component analysis (OLMD-KPCA) method is proposed in this paper...
March 10, 2017: Applied Optics
https://www.readbyqxmd.com/read/28373590/vascular-damage-in-children-with-chronic-kidney-disease-the-fog-is-dispersing
#9
Luminita Voroneanu, Adrian Covic
No abstract text is available yet for this article.
April 3, 2017: Hypertension
https://www.readbyqxmd.com/read/28370038/editorial-international-consensus-in-clinical-trial-end-points-in-ulcerative-colitis-clarity-or-just-a-step-in-clearing-the-fog
#10
EDITORIAL
B Christensen, M P Sparrow
No abstract text is available yet for this article.
May 2017: Alimentary Pharmacology & Therapeutics
https://www.readbyqxmd.com/read/28368369/global-analysis-of-biosynthetic-gene-clusters-reveals-vast-potential-of-secondary-metabolite-production-in-penicillium-species
#11
Jens Christian Nielsen, Sietske Grijseels, Sylvain Prigent, Boyang Ji, Jacques Dainat, Kristian Fog Nielsen, Jens Christian Frisvad, Mhairi Workman, Jens Nielsen
Filamentous fungi produce a wide range of bioactive compounds with important pharmaceutical applications, such as antibiotic penicillins and cholesterol-lowering statins. However, less attention has been paid to fungal secondary metabolites compared to those from bacteria. In this study, we sequenced the genomes of 9 Penicillium species and, together with 15 published genomes, we investigated the secondary metabolism of Penicillium and identified an immense, unexploited potential for producing secondary metabolites by this genus...
April 3, 2017: Nature Microbiology
https://www.readbyqxmd.com/read/28367983/cholinesterase-like-organocatalysis-by-imidazole-and-imidazole-bearing-molecules
#12
Paola Nieri, Sara Carpi, Stefano Fogli, Beatrice Polini, Maria Cristina Breschi, Adriano Podestà
Organocatalysis, which is mostly explored for its new potential industrial applications, also represents a chemical event involved in endogenous processes. In the present study, we provide the first evidence that imidazole and imidazole derivatives have cholinesterase-like properties since they can accelerate the hydrolysis of acetylthiocholine and propionylthiocholine in a concentration-dependent manner. The natural imidazole-containing molecules as L-histidine and histamine show a catalytic activity, comparable to that of imidazole itself, whereas synthetic molecules, as cimetidine and clonidine, were less active...
April 3, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28364448/cerebrospinal-fluid-biomarkers-of-neurodegeneration-are-decreased-or-normal-in-narcolepsy
#13
Poul Jørgen Jennum, Lars Østergaard Pedersen, Justyna Maria Czarna Bahl, Signe Modvig, Karina Fog, Anja Holm, Birgitte Rahbek Kornum, Steen Gammeltoft
Objectives: To investigate whether cerebrospinal fluid (CSF) biomarkers of neurodegeneration are altered in narcolepsy in order to evaluate whether the hypocretin deficiency and abnormal sleep-wake pattern in narcolepsy leads to neurodegeneration. Methods: Twenty-one patients with central hypersomnia (10 type 1 narcolepsy, 5 type 2 narcolepsy, and 6 idiopathic hypersomnia cases), aged 33 years on average and with a disease duration of 2-29 years, and 12 healthy controls underwent CSF analyses of the levels of β-amyloid, total tau protein (T-tau), phosphorylated tau protein (P-tau181), α-synuclein, neurofilament light chain (NF-L), and chitinase 3-like protein-1 (CHI3L1)...
January 1, 2017: Sleep
https://www.readbyqxmd.com/read/28361544/response-to-mammographic-density-as-a-risk-factor-to-go-out-of-a-30-year-fog
#14
Per Skaane
No abstract text is available yet for this article.
January 1, 2017: Acta Radiologica
https://www.readbyqxmd.com/read/28358341/preserving-source-location-privacy-for-energy-harvesting-wsns
#15
Changqin Huang, Ming Ma, Yuxin Liu, Anfeng Liu
Fog (From cOre to edGe) computing employs a huge number of wireless embedded devices to enable end users with anywhere-anytime-to-anything connectivity. Due to their operating nature, wireless sensor nodes often work unattended, and hence are exposed to a variety of attacks. Preserving source-location privacy plays a key role in some wireless sensor network (WSN) applications. In this paper, a redundancy branch convergence-based preserved source location privacy scheme (RBCPSLP) is proposed for energy harvesting sensor networks, with the following advantages: numerous routing branches are created in non-hotspot areas with abundant energy, and those routing branches can merge into a few routing paths before they reach the hotspot areas...
March 30, 2017: Sensors
https://www.readbyqxmd.com/read/28347134/evaluating-droplet-digital-polymerase-chain-reaction-for-the-quantification-of-human-genomic-dna-lifting-the-traceability-fog
#16
Margaret C Kline, David L Duewer
Digital polymerase chain reaction (dPCR) end point platforms directly estimate the number of DNA target copies per reaction partition, λ, where the partitions are fixed-location chambers (cdPCR) or aqueous droplets floating in oil (ddPCR). For use in the certification of target concentration in primary calibrant certified reference materials (CRMs), both λ and the partition volume, V, must be metrologically traceable to some accessible reference system, ideally, the International System of Units (SI). The fixed spatial distribution of cdPCR chambers enables real-time monitoring of PCR amplification...
April 6, 2017: Analytical Chemistry
https://www.readbyqxmd.com/read/28345058/nonrainfall-water-origins-and-formation-mechanisms
#17
Kudzai Farai Kaseke, Lixin Wang, Mary K Seely
Dryland ecosystems cover 40% of the total land surface on Earth and are defined broadly as zones where precipitation is considerably less than the potential evapotranspiration. Nonrainfall waters (for example, fog and dew) are the least-studied and least-characterized components of the hydrological cycle, although they supply critical amounts of water for dryland ecosystems. The sources of nonrainfall waters are largely unknown for most systems. In addition, most field and modeling studies tend to consider all nonrainfall inputs as a single category because of technical constraints, which hinders prediction of dryland responses to future warming conditions...
March 2017: Science Advances
https://www.readbyqxmd.com/read/28340451/the-role-of-drug-drug-interactions-in-prostate-cancer-treatment-focus-on-abiraterone-acetate-prednisone-and-enzalutamide
#18
REVIEW
Marzia Del Re, Stefano Fogli, Lisa Derosa, Francesco Massari, Paul De Souza, Stefania Crucitta, Sergio Bracarda, Daniele Santini, Romano Danesi
Elderly patients with cancer may have comorbidities, each requiring additional pharmacologic treatment. Therefore, the occurrence of pharmacokinetic (PK) and pharmacodynamic (PD) interactions is very likely, and the risk of adverse reactions (ADRs), due to the narrow therapeutic window of anticancer drugs, is increased. Drug-drug interactions (DDIs) may occur in prostate cancer patients due to inhibition by abiraterone of liver cytochrome P450 (CYP)-dependent enzymes CYP2C8 and 2D6, which are involved in the metabolism of approximately 25% of all drugs, and induction by enzalutamide of CYP3A4, 2C9 and 2C19, which metabolize up to 50% of medications...
March 9, 2017: Cancer Treatment Reviews
https://www.readbyqxmd.com/read/28338620/a-secure-and-privacy-preserving-navigation-scheme-using-spatial-crowdsourcing-in-fog-based-vanets
#19
Lingling Wang, Guozhu Liu, Lijun Sun
Fog-based VANETs (Vehicular ad hoc networks) is a new paradigm of vehicular ad hoc networks with the advantages of both vehicular cloud and fog computing. Real-time navigation schemes based on fog-based VANETs can promote the scheme performance efficiently. In this paper, we propose a secure and privacy-preserving navigation scheme by using vehicular spatial crowdsourcing based on fog-based VANETs. Fog nodes are used to generate and release the crowdsourcing tasks, and cooperatively find the optimal route according to the real-time traffic information collected by vehicles in their coverage areas...
March 24, 2017: Sensors
https://www.readbyqxmd.com/read/28335278/recent-prospects-in-the-inline-monitoring-of-nanocomposites-and-nanocoatings-by-optical-technologies
#20
REVIEW
Elodie Bugnicourt, Timothy Kehoe, Marcos Latorre, Cristina Serrano, Séverine Philippe, Markus Schmid
Nanostructured materials have emerged as a key research field in order to confer materials with unique or enhanced properties. The performance of nanocomposites depends on a number of parameters, but the suitable dispersion of nanoparticles remains the key in order to obtain the full nanocomposites' potential in terms of, e.g., flame retardance, mechanical, barrier, thermal properties, etc. Likewise, the performance of nanocoatings to obtain, for example, tailored surface affinity with selected liquids (e.g...
August 19, 2016: Nanomaterials
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