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A Performance Evaluation of the Convex SPP-1000 Scalable Shared Memory Parallel Computer

Thomas Sterling, Daniel Savaresse, Peter MacNeice, Kevin Olson, Clark Mobarry, Bruce Fryxell, Phillip Merkey
1995 Proceedings of the 1995 ACM/IEEE conference on Supercomputing (CDROM) - Supercomputing '95  
This paper presents the findings of a set of empirical studies using both synthetic test codes and full applications for the Earth and space sciences to characterize the performance properties of this  ...  The Convex SPP-1000 is the first commercial implementation of a new generation of scalable shared memory parallel computers with full cache coherence.  ...  Acknowledgments This research has been supported by the NASA High Performance Computing and Communication Initiative.  ... 
doi:10.1145/224170.285573 dblp:conf/sc/SterlingSMOMFM95 fatcat:4mt53u4lqzdzjdlzh6xcbiqbc4

Second Path Planning for Unmanned Surface Vehicle Considering the Constraint of Motion Performance

Fan, Li, Liao, Jiang, Wang, Jia, Wu
2019 Journal of Marine Science and Engineering  
The artificial potential field method was used as an example for the initial path planning.  ...  This paper presents a second path planning method (SPP), which is an initial planning path optimization method based on the geometric relationship of the three-point path.  ...  The essence of the APF is to define an abstract potential field artificially for the operating space of the robot, which is the superposition of the gravitational field of the target position and the repulsive  ... 
doi:10.3390/jmse7040104 fatcat:dzhe45viczaizg24jbytl4l2ni

Naval Research Laboratory

1948 Physics today  
Origin2000 with 128 Gbyte of memory, an 80-processor HP/Convex Exemplar SPP-2000 with 20 Gbytes of memory, and a 148-processor Sun HPC Ultra with 30 Gbytes of memory.  ...  Remote Sensing The Remote Sensing Division conducts a program of basic research, science, and applications to develop new concepts for sensors and imaging systems for objects and targets on Earth, in the  ... 
doi:10.1063/1.3066111 fatcat:mof42ri445he7f3ohoi27etera

FRACTIONAL SNOW COVER MAPPING BY ARTIFICIAL NEURAL NETWORKS AND SUPPORT VECTOR MACHINES

B. B. Çiftçi, S. Kuter, Z. Akyürek, G.-W. Weber
2017 ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences  
Snow is an important land cover whose distribution over space and time plays a significant role in various environmental processes.  ...  This study aims to investigate and compare the design and use of artificial neural networks (ANNs) and support vector machines (SVMs) algorithms for fractional snow cover (FSC) mapping from satellite data  ...  At altitudes from 1000-1300 m, Hornbeam (Carpinus spp.) and Beech (Fagus orientalis L.) are dominantly observed with some other firewood and deciduous plants.  ... 
doi:10.5194/isprs-annals-iv-4-w4-179-2017 fatcat:shrogmhkavbkto77zltq33amoq

Cirrus cloud shape detection by tomographic extinction retrievals from infrared limb emission sounder measurements

Jörn Ungermann, Irene Bartolome, Sabine Griessbach, Reinhold Spang, Christian Rolf, Martina Krämer, Michael Höpfner, Martin Riese
2020 Atmospheric Measurement Techniques  
The results for the extinction retrieval even show an improvement of 60 %.  ...  An improved cloud-index-based method for the detection of clouds in limb sounder data is presented that exploits the spatial overlap of measurements to more precisely detect the location of (optically  ...  The Imaging IR Limb Sounder (IRLS) is a concept for an Earth-observing satellite instrument that was originally proposed for the ESA's seventh Earth Explorer program.  ... 
doi:10.5194/amt-13-7025-2020 fatcat:o5anfm7wujhbtaihrr2o7ugr3u

Parametric Model and Optimal Control of Solar Sails with Optical Degradation

Bernd Dachwald, Giovanni Mengali, Alessandro A. Quarta, Malcolm Macdonald
2006 Journal of Guidance Control and Dynamics  
The SRP force exerted on an ideal sail orbital plane Fig. 1 Definition of the sail normal vector and the thrust unit vector. 1172 DACHWALD ET AL. of area A is> F spp = 2PAcos’ an (2) For a thorough mission  ...  presented for an exemplary two-dimensional circular orbit-to-orbit Earth—Mars transfer.  ... 
doi:10.2514/1.20313 fatcat:aojk4sdognhzfntxghg22sg6cu

Optimal Planner for Spacecraft Formations in Elliptical Orbits

Darren J. Zanon, Mark E. Campbell
2006 Journal of Guidance Control and Dynamics  
In this problem, 63 evaluations of wWj2,- were made for each spacecraft by performing two scans. First, the profile of Wi2.¢ € [—90, 90] deg was scanned using 33 evenly spaced points.  ...  The region shown contains 34 points and was gen- erated using a coarse grid of 7 points evenly spaced across the range W\2 € [—17, 17] deg and a fine mesh of 30 constantly spaced points for the inner region  ... 
doi:10.2514/1.7236 fatcat:a3sqfjt2bnb23llde3ldnx5kg4

Campylobacter, a zoonotic pathogen of global importance: Prevalence and risk factors in the fast-evolving chicken meat system of Nairobi, Kenya

Maud Carron, Yu-Mei Chang, Kelvin Momanyi, James Akoko, John Kiiru, Judy Bettridge, Gemma Chaloner, Jonathan Rushton, Sarah O'Brien, Nicola Williams, Eric M. Fèvre, Barbara Häsler (+1 others)
2018 PLoS Neglected Tropical Diseases  
The prevalence results for Campylobacter spp. were between 33 to 44% for broiler and indigenous chicken PLOS Neglected Tropical Diseases | https://doi.et al. (2018) Campylobacter, a zoonotic pathogen of  ...  The objectives of this study were: 1) to determine the prevalence of Campylobacter spp. in Nairobi's small-scale chicken farms and meat retailers, and 2) to identify potential risk factors associated with  ...  Acknowledgments We would like to thank the Department of Veterinary Services within the Kenyan Ministry of Livestock Development for their support, and all their officers who helped researchers in accessing  ... 
doi:10.1371/journal.pntd.0006658 pmid:30102697 fatcat:er7f6apzsvgk3czzpr3ldr6vz4

Isoscapes of carbon and oxygen stable isotope compositions in tracing authenticity and geographical origin of Italian extra-virgin olive oils

Francesca Chiocchini, Silvia Portarena, Marco Ciolfi, Enrico Brugnoli, Marco Lauteri
2016 Food Chemistry  
and other Earth and environmental sciences.  ...  Just to give an idea, a small 100 × 100 × 100 model needs about 20 MB and a 1000 × 1000 × 1000 one requires 20 GB of database space.  ...  It is possible, however, to evaluate N downscaled, tiny models and then the full-scaledM with the same parameters values.  ... 
doi:10.1016/j.foodchem.2016.01.146 pmid:26920297 fatcat:3ljrfcy3hzfl3ljoa3cp6sgugm

Restored saltmarshes lack the topographic diversity found in natural habitat

Peter J. Lawrence, Graham R. Smith, Martin J.P. Sullivan, Hannah L. Mossman
2018 Ecological Engineering: The Journal of Ecotechnology  
have 31 implications for a range of ecosystem functions. 32 33  ...  We 18 investigate the topographic characteristics of 19 MR areas, and compare these to nearby 19 natural saltmarshes (representing desired conditions) and to coastal agricultural landscapes 20 (representing  ...  For profile curvature, the 680 dotted line separates convex (-ve) and concave (+ve) scores.  ... 
doi:10.1016/j.ecoleng.2018.02.007 fatcat:soe5idrzbjaxxmmrro7iwwnt2i

Society of Nematologists 2011 Meeting: Abstracts: Alphabetically by first author

2011 Journal of nematology  
Our objective was to determine whether co-infection of cotton by Meloidogyne incognita and Rotylenchulus reniformis affects the population level of either nematode compared to infection by each species  ...  One half of the root system of 6-week-old plants was inoculated with R. reniformis  ...  In that year, six field trials evaluated the effectiveness of different rates and application frequencies of EcoNem for management of B. longicaudatus on bermudagrass (Cynodon spp.).  ... 
pmid:23431222 pmcid:PMC3547343 fatcat:acgtzmpjengqrhuxtpcnvvmivq

Cortinarius pakistanicus and C. pseudotorvus: two new species in oak forests in the Pakistan Himalayas

Arooj Naseer, Isaac Garrido-Benavent, Junaid Khan, Josep Ballarà, Rafael Mahiques, Abdul Nasir Khalid, Hassan Sher
2020 MycoKeys  
An integrative framework combining morphological and phylogenetic data was employed for their study.  ...  As a result, the two species C. pakistanicus and C. pseudotorvus are here described as new to science.  ...  Acknowledgements We would like to thank Emma Harrower (US), Jean-Michel Bellanger (FR) and Bálint Dima (HU) for their helpful comments and suggestions. References  ... 
doi:10.3897/mycokeys.74.49734 pmid:33204208 pmcid:PMC7648052 fatcat:n6gwlherbfctbkjjqtghy337nu

Multistate Ornstein-Uhlenbeck approach for practical estimation of movement and resource selection around central places [article]

Joseph M Eisaguirre, Travis L Booms, Christopher P Barger, Scott D Goddard, Greg A Breed
2020 bioRxiv   pre-print
The underlying mathematical properties of the model allow straightforward computation of predicted utilization distributions, permitting estimation of home range size and visualization of space use patterns  ...  The application to golden eagles revealed effects of habitat variables that align with predicted behavioral ecology.  ...  The scale parameter was set at 10, 50, or 100, prescribing each landscape a and ω = 1 or 2) for a total of 18 landscape/parameter scenarios. σ 2 was fixed at 100 2 and µ at (1000, 1000).  ... 
doi:10.1101/2020.10.28.359430 fatcat:ue7dq2q55rabhhikhq7bmvwvna

SPECIAL ISSUE: ABSTRACTS FROM THE 2008 ISSOL MEETING

2009 Origins of life and evolution of the biosphere  
Acknowledgements This work financially supported by Grant Agency of the Czech Republic (grant No. 203/06/ 1278) and the Czech Ministry of Education (grants LC510, LC528, and LA08024).  ...  Optical and x-ray emission spectroscopy of high-power laser-induced dielectric breakdown in molecular gases and their mixtures. Journal of Physical Chemistry A, 110:12113-12120.  ...  to the Earth and bringing equipment into space for rigorous study of Solar system bodies.  ... 
doi:10.1007/s11084-009-9164-7 pmid:19468860 pmcid:PMC2691805 fatcat:zv2le4yeirbrtowyyqc3m5lcom

Optical Nano-antennas [article]

Amir Djalalian-Assl
2020 arXiv   pre-print
Their applications in wavelength division multiplexing/demultiplexing, shaping the radiation pattern and the state of polarization of the transmitted light, refractive index based sensing, enhancement  ...  to the radiative decay rate of nearby quantum emitters and novel approach in achieving such effects are presented.  ...  the coupling of the light and the SPPs on the incident surface [79] that initiate an evanescent tunnelling process through the holes.  ... 
arXiv:1912.10888v2 fatcat:kkrlz4kh3baq7mpiq4agam73hy
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