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On Sunflowers and Matrix Multiplication

Noga Alon, Amir Shpilka, Christopher Umans
2012 2012 IEEE 27th Conference on Computational Complexity  
multiplication algorithms.  ...  lower bound of (2.51 . . .) n on the size of the largest multicolored 3-sunflower-free set, which beats the current best known lower bound of (2.21 . . .) n [Edel04] on the size of the largest 3-sunflower-free  ...  A new approach for matrix multiplication that is based on group representation theory was suggested by Cohn and Umans [CU03] .  ... 
doi:10.1109/ccc.2012.26 dblp:conf/coco/AlonSU12 fatcat:bfqzhcmpkbddxlt4f5sgdkq47e

On sunflowers and matrix multiplication

Noga Alon, Amir Shpilka, Christopher Umans
2013 Computational Complexity  
multiplication algorithms.  ...  lower bound of (2.51 . . .) n on the size of the largest multicolored 3-sunflower-free set, which beats the current best known lower bound of (2.21 . . .) n [Edel04] on the size of the largest 3-sunflower-free  ...  We thank Henry Cohn, Bobby Kleinberg, and Balázs Szegedy for help in formulating the weak sunflower conjecture in Z n D , and for useful discussions.  ... 
doi:10.1007/s00037-013-0060-1 fatcat:hjg3xwcpt5dkbfom6kknapm4ia

Formulation and In Vitro Evaluation of Sunflower Oil Entrapped within Buoyant Beads of Furosemide

Rammohan Bera
2009 Scientia Pharmaceutica  
The study also demonstrated the influence of sunflower oil on drug entrapment (81-95%) and in vitro release.  ...  The purpose of the present study was to develop buoyant beads for the intragastric delivery of furosemide in order to evaluate the effect of incorporated sunflower oil on physiochemical properties of alginate  ...  Sunflower oil serves as the dispersed phase to prepare uniform emulsion to create multiple tiny pockets in the alginate matrix for better buoyancy.  ... 
doi:10.3797/scipharm.0811-02 fatcat:bgmlp2wq6bfh3d36cp4yumikfe

Econometric ridge regression models of risk-sensitive sunflower yield

M.I. Slozhenkina, I.F. Gorlov, O.A. Kholodov, M.A. Kholodova, O.P. Shakhbazova, D.A. Mosolova, O.A. Knyazhechenko
2021 Arquivo Brasileiro de Medicina Veterinária e Zootecnia  
The calculation results of econometric models made it possible to develop three author's scenarios for the sunflower production in the region, namely, inertial, moderate, and optimistic ones that consider  ...  The article considers econometric ridge regression models of the risk-sensitive sunflower yield on the example of an export-oriented agricultural crop.  ...  The multiple linear regression equation took into account the influence of production factors on the sunflower yield level and was formed into Y = a + b x1 + b x + b x +…bnxn, ( 5 ) where Y is the sunflower  ... 
doi:10.1590/1678-4162-12367 doaj:318a50f710144e78aee2be50eb69a7f4 fatcat:ddllkjehxjak3i6sdnfnvyq7uu

Methodological Aspects of Theoretical Determination of the Kmz-2 Extruder Performance

2020 International Journal of Engineering and Advanced Technology  
the matrix dies; to consider the movement of the pressed material in the matrix die of the KMZ-2 extruder.  ...  and with increasing the extrusion speed its performance increases accordingly  ...  Figure 3 -The material that exits through the matrix die of the extruder During the movement of sunflower cake through the matrix die, the pressure P x and the reaction force N x act both.  ... 
doi:10.35940/ijeat.d7266.049420 fatcat:2nxjbcwjjbdhnnxw56o4vuaz2i

Equidistant subspace codes [article]

Elisa Gorla, Alberto Ravagnani
2015 arXiv   pre-print
Finally, we propose a systematic construction of equidistant codes based on our previous construction of partial spread codes, and provide an efficient decoding algorithm.  ...  We also study equidistant codes with extremal parameters, and establish general properties of equidistant codes that are not sunflowers.  ...  A network is modeled by a directed acyclic multigraph, and information travels from one or multiple sources to multiple receivers through intermediate nodes.  ... 
arXiv:1507.01728v1 fatcat:jbxpg5shrrg4dak37wwdtfjnvy

Spatial distribution of sunflower cultivars and the relationship between growth features

Thomas Newton Martin, Paulo Sérgio Pavinato, Leandro Homrich Lorentz, Renice Paula Zielinski, Rosana Refatti
2012 Revista Ciência Agronômica  
It was performed a path analysis, identifying the features that have most influence on sunflower grain yield and one hundred grain weight, also multiple regression analysis was used to estimate the equation  ...  for grain yield and one hundred grain weight.  ...  Multiple linear regression equations of sunflower grain yield and one hundred grain weight are presented on the genotype features evaluated alone, and in the total amount when evaluated the genotypes  ... 
doi:10.1590/s1806-66902012000200017 fatcat:5zi7ksb5xvd7bhy4bnmrssn6qi

Association Mapping and the Genomic Consequences of Selection in Sunflower

Jennifer R. Mandel, Savithri Nambeesan, John E. Bowers, Laura F. Marek, Daniel Ebert, Loren H. Rieseberg, Steven J. Knapp, John M. Burke, Nathan M. Springer
2013 PLoS Genetics  
We used these data to characterize overall patterns of genomic diversity and to perform association analyses on plant architecture (i.e., branching) and flowering time, successfully identifying numerous  ...  cultivated sunflower germplasm collection.  ...  Acknowledgments We would like to thank Weining Tang and Mark Bouzyk at Emory University for assistance with the SNP genotyping; Jonathan Corbi and Jessica Barb for editorial and technical comments; and  ... 
doi:10.1371/journal.pgen.1003378 pmid:23555290 pmcid:PMC3605098 fatcat:qukgdm3ejzckvp2ktabewx3a5a

Network and biosignature analysis for the integration of transcriptomic and metabolomic data to characterize leaf senescence process in sunflower

Sebastián Moschen, Janet Higgins, Julio A. Di Rienzo, Ruth A. Heinz, Norma Paniego, Paula Fernandez
2016 BMC Bioinformatics  
Leaf senescence is a complex mechanism controlled by multiple genetic and environmental variables, which has a strong impact on crop yield.  ...  The methodology presented here would help to elucidate and predict novel networks and potential biomarkers of leaf senescence in sunflower.  ...  Declarations Publication charges for this work were funded by INTA Préstamo BID PICT 2012 0390 and PIP CONICET 11220120100262CO.  ... 
doi:10.1186/s12859-016-1045-2 pmid:27295368 pmcid:PMC4905614 fatcat:d35svynvnrbslf636reiqby3na

Digital Image Analysis Using FloCIA Software for Ornamental Sunflower Ray Floret Color Evaluation

Martina Zorić, Sandra Cvejić, Emina Mladenović, Siniša Jocić, Zdenka Babić, Ana Marjanović Jeromela, Dragana Miladinović
2020 Frontiers in Plant Science  
For this purpose, we created a new Flower Color Image Analysis (FloCIA) software for sunflower ray floret digital image segmentation and automatic classification into one of the categories given by the  ...  Standard methodology for the evaluation of sunflower ray florets is based on International Union for the Protection of New Varieties of Plants (UPOV) guidelines for sunflower.  ...  ACKNOWLEDGMENTS The authors would like to thank the technicians of the Institute for Field and Vegetable Crops who took great care of the sunflowers and all evaluators who assessed the sunflower ray florets  ... 
doi:10.3389/fpls.2020.584822 pmid:33240302 pmcid:PMC7680878 fatcat:lkq3nribj5hgndpv7mu5qwge4e

NEW DEVELOPMENTS IN CROP ROTATION

Alexander Sadovski
2021 Ecological Engineering and Environment Protection  
These changes will undoubtedly lead to a reconsideration of the question of the necessary crop rotations on the territory of the individual continents and sub-regions.  ...  Many researchers have conducted field experiments with different crop rotations on several soil types and have received determined results, but still lack concrete unified numerical estimates of the influence  ...  The orthogonal matrix H may be regarded as measuring departures from symmetry in a multiplicative sense.  ... 
doi:10.32006/eeep.2021.1.6877 fatcat:kakte4omfbakpi5qxhhveokicq

Hypergraph encodings of arbitrary toric ideals [article]

Sonja Petrović, Apostolos Thoma, Marius Vladoiu
2017 arXiv   pre-print
Relying on the combinatorial classification of toric ideals using their bouquet structure, we focus on toric ideals of hypergraphs and study how they relate to general toric ideals.  ...  We show that hypergraphs exhibit a surprisingly general behavior: the toric ideal associated to any general matrix can be encoded by that of a 0/1 matrix, while preserving the essential combinatorics of  ...  Precisely, for a positive entry λ of the matrix A we consider a 3-uniform sunflower with one core vertex and |λ| petals, while for a negative entry λ we consider the sunflower with one core vertex and  ... 
arXiv:1711.04354v1 fatcat:dkfh25o7nzbp7p65jvdcejttfy

Interpretation of interactions in sunflower agronomic trials using multiplicative models and climatic information

Igor Balalic, M. Zoric, J. Crnobarac
2008 Helia  
A three-year experiment (2005, 2006, 2007) including three sunflower hybrids and eight sowing dates was carried out in order to study the impact of hybrid × sowing date interaction on oil yield of sunflower  ...  The multiplicative interaction between H × R was further separated in two bilinear terms (PC1 and PC2), and both were highly significant.  ...  The objective of this study was to determine the impact of sowing date on oil yield of sunflower hybrids, so as to evaluate the hybrid × sowing date interaction using multiplicative models such as SREG  ... 
doi:10.2298/hel0849051b fatcat:glw2wxkg4zbfhkeg4sfag5nc5q

Soil Water Depletion and Recharge under Ten Crop Species and Applications to the Principles of Dynamic Cropping Systems

Stephen D. Merrill, Donald L. Tanaka, Joseph M. Krupinsky, Mark A. Liebig, Jonathan D. Hanson
2007 Agronomy Journal  
Lower soil water following crops such as sunflower and corn was linked to negative crop sequential effects in this project.  ...  Dynamic cropping systems principles require that farmers consider climatic, market, and ecological factors on an annual basis in making crop choices.  ...  Sunflower showed overall positive crop sequential effects on other species during the crop matrix years, and had positive effects on spring wheat crops that were seeded after the crop matrices.  ... 
doi:10.2134/agronj2006.0134s fatcat:hvqfqsvkjncxtl3dicqbmezj6a

Soil Water Depletion and Recharge under Ten Crop Species and Applications to the Principles of Dynamic Cropping Systems

S. D. Merrill, D. L. Tanaka, J. M. Krupinsky, M. A. Liebig, J. D. Hanson
2007 Agronomy Journal  
Lower soil water following crops such as sunflower and corn was linked to negative crop sequential effects in this project.  ...  Dynamic cropping systems principles require that farmers consider climatic, market, and ecological factors on an annual basis in making crop choices.  ...  Sunflower showed overall positive crop sequential effects on other species during the crop matrix years, and had positive effects on spring wheat crops that were seeded after the crop matrices.  ... 
doi:10.2134/agronj2006.0134 fatcat:uu26rikwbbbwjn2etujjbpu66a
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