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Further results on irregular, critical perfect systems of difference sets I: split systems

G.M. Hamilton, D.G. Rogers
1992 Discrete Mathematics  
Rogers, Further results on irregular, critical perfect systems of difference sets I: split systems, Discrete Mathematics 102 (1992) 25-45.  ...  We discuss the bearing of these results on the study of critical perfect systems and on the multiplicarion theorem for these systems.  ...  One of us, D.G.  ... 
doi:10.1016/0012-365x(92)90344-f fatcat:mgy7np2kvfcurhx7jzzn4k7fza

Further results on irregular, critical perfect systems of difference sets II: systems without splits

T. Hayasaka, S. Saito, D.G. Rogers
1992 Discrete Mathematics  
Rogers, Further results on irregular, critical perfect systems of difference sets II: systems without splits, Discrete Mathematics 110 (1992) 135-154.  ...  An (m, n; u, v; c)-system is a collection of components, m of valency u -1 and n of valency 0012-365X/92/$05.00 0 1992-Elsevier Science Publishers B.V. All rights reserved  ...  A perfect system of difference sets with threshold c is a partition of a consecutive run of integers starting with c into full, pairwise disjoint difference sets.  ... 
doi:10.1016/0012-365x(92)90703-i fatcat:vitf3bqsjfawnple6hgl36m4bi

Analysis of A Splitting Approach for the Parallel Solution of Linear Systems on GPU Cards [article]

Ang Li, Radu Serban, Dan Negrut
2015 arXiv   pre-print
The split andparallelize ( SaP) approach seeks to partition the matrix A into diagonal sub-blocks A_i, i=1,...,P, which are independently factored in parallel.  ...  We discuss an approach for solving sparse or dense banded linear systems A x = b on a Graphics Processing Unit (GPU) card.  ...  Table A. 1 gives the list of tested matrices, specifying  ... 
arXiv:1509.07919v1 fatcat:z6434bxvmrcq3emoxzxvm54gcu

An arithmetic of complete permutations with constraints, I: an exposition of the general theory

D.G. Rogers
1988 Discrete Mathematics  
of complete permutations with constraints or of irregular, extreme1 perfect systems of difference sets.  ...  We develop an arithrretic of complete permutations of sy-ilmetric, integral bases; this arithmetic is comparable to that of perfect systems of difference sets with which there are several interrelations  ...  critical perfect systems of difference sets), we show further, in Sections 7 and 8 (see [7]): 'Iheorem B1.  ... 
doi:10.1016/0012-365x(88)90001-5 fatcat:dn3cxkjitbbflbizwsz53iv2da

Multiscale cluster lens mass mapping - I. Strong lensing modelling

E. Jullo, J.-P. Kneib
2009 Monthly notices of the Royal Astronomical Society  
Our model consists of (i) a multi-scale grid of radial basis functions with physically motivated profiles and (ii) a list of galaxy-scale potentials at the location of the cluster member galaxies.  ...  This arrangement of potentials of different sizes allows to reach a high resolution for the model with a minimum number of parameters. We apply our model to the well studied cluster Abell 1689.  ...  We set the splitting threshold to the critical surface density stated above. lensing regions, within which κ > 1.  ... 
doi:10.1111/j.1365-2966.2009.14654.x fatcat:gewkyw5w3fhs3mh4246kpg2hp4

Track I

2014 Biomedical Engineering  
., Hanover, Germany, Conclusion Although there was no significant effect on the calculated optical power standing for the accommodation ability, our results show a positive effect on the  ...  The quantification of cell maturity at microscopic level is a tedious and error-prone task and heavily relies on the experience of the pathologists.  ...  of Innovation, Science and Research of Northrhine-Westfalia, Germany for the funding of this work in the Med in.NRW program (grant no. 005-GW01-78A).  ... 
doi:10.1515/bmt-2014-5008 pmid:25385893 fatcat:4o7vqkhdmfgk5fjzqpeh74x5te

I. Bioengineering

2003 Technology and Health Care  
doses based on in situ dosimetrical measurements were not set until now.  ...  Based on these results it could be assumed that there is some space for the reducing of entrance dose levels.  ...  Acknowledgement: This work is sponsored by Ministry of Science and Technology of Republic of Croatia, project No. 023022 "Biomechanics of Human Locomotion, Control and Rehabilitation".  ... 
doi:10.3233/thc-2004-12202 fatcat:vdnpg2qonnbcjabk5goatbn6oy

Performance characterization of irregular I/O at the extreme scale

S. Herbein, S. McDaniel, N. Podhorszki, J. Logan, S. Klasky, M. Taufer
2016 Parallel Computing  
For our testing, we feed our model into I/O kernels of two well-known I/O data models (i.e., ADIOS and HDF) to measure the performance of the two applications' I/O under different I/O settings.  ...  To this end, we quantify the impact of irregular I/O patterns on the I/O performance of scientific applications at the extreme scale by statistically modeling the irregular I/O behavior of two scientific  ...  Based on our observations, we conclude that a further increase in the aggregation ratio will result in a further increase in I/O overhead and deterioration of the I/O scalability.  ... 
doi:10.1016/j.parco.2015.10.009 fatcat:jurcd2jqcbhnfejaytjpo3osx4

Fibonacci or quasi-symmetric phyllotaxis. Part I: why?

Christophe Golé, Jacques Dumais, Stéphane Douady
2016 Acta Societatis Botanicorum Poloniae  
irregular configurations exhibiting nearly equal number of helices in a quasi-square packing, the quasi-symmetric ones, which are a generalization of the whorled patterns.  ...  The study of phyllotaxis has focused on seeking explanations for the occurrence of consecutive Fibonacci numbers in the number of helices paving the stems of plants in the two opposite directions.  ...  Acknowledgments The authors thank Przemyslaw Prusinkiewicz for his critical and constructive reading of the article. The article benefitted from past work and discussions with Pau Atela.  ... 
doi:10.5586/asbp.3533 fatcat:5ro465jqkzgjbmcj6kt5juo3a4

I/O performance challenges at leadership scale

Samuel Lang, Philip Carns, Robert Latham, Robert Ross, Kevin Harms, William Allcock
2009 Proceedings of the Conference on High Performance Computing Networking, Storage and Analysis - SC '09  
Listed in the top 5 fastest supercomputers of 2008, Intrepid runs computational science applications with intensive demands on the I/O system.  ...  In this paper we present a case study of the I/O challenges to performance and scalability on Intrepid, the IBM Blue Gene/P system at the Argonne Leadership Computing Facility.  ...  We will continue to study the behavior of the I/O system on Intrepid. Future work will focus on characterizing system performance over an extended period of time.  ... 
doi:10.1145/1654059.1654100 dblp:conf/sc/LangCLRHA09 fatcat:ztzndu4sivgbvctctnbkcstnaa

Forthcoming papers

1991 Discrete Mathematics  
Simpson, Disjoint covering systems of rational Beatty sequences A rational Beatty sequence is a sequence {[on + /I]}, where (Y is rational, n runs through the integers and square brackets denote integer  ...  It is shown that the collection of all ('4) quadruples chosen from a set of eleven points can be partitioned into eleven mutually disioint 3-(10.4. 11 desiens in oreciselv 21 non-isomomhic wavn. R.J.  ...  Rogers, Further results on irregular, critical perfect systems of difference sets An (m, n; U, u; c)-system is a collection of components, m of valency u -1 and n of valency u -1, whose difference sets  ... 
doi:10.1016/0012-365x(91)90052-4 fatcat:3g4xmr656vaczdgn4xzyl6d6ra

Author index to volume 110 (1992)

1992 Discrete Mathematics  
Rogers, Further results on irregular, critical perfect systems of difference sets II: systems without splits Holroyd, F.C., Reconstructing finite group actions and characters from subgroup information  ...  Stinson, Further results on large sets of disjoint group-divisible designs Chung, F., P. Diaconis and R. Graham, Universal cycles for combinatorial structures Cochand, M., A. Gaillard and H.  ...  ., On sources in comparability graphs, with applications (Note) Parnes, S. and S.B. Ekhad, A WZ-style proof of Jacobi polynomials' generating function (  ... 
doi:10.1016/0012-365x(92)90725-u fatcat:7gid67tulnfixjh4klmz52a5rq

A Comparative Study of the Effects of Different Types of School-Building Ventilation on the Health of Pupils. I

1929 The Elementary school journal  
A COMPARATIVE STUDY OF THE EFFECTS OF DIFFER- ENT TYPES OF SCHOOL-BUILDING VENTILA- TION ON THE HEALTH OF PUPILS. I RUSSELL L. C.  ...  Split system (air through an opening on interior wall at height of 7 feet) . Split system (air through several openings in the ceiling) .  ... 
doi:10.1086/456348 fatcat:y7h4kxhh7bd2nftaggll2ynyme

Dislocations and plasticity in semiconductors. I — Dislocation structures and dynamics

A. George, J. Rabier
1987 Revue de Physique Appliquée  
Les analogies et les différences entre les structures et les propriétés des dislocations dans les ESC et CSC sont aussi discutées.  ...  On met l'accent sur les propriétés spécifiques des dislocations dans les SC aux températures plus basses que 0,6 Tf où le glissement des dislocations est régi par un mécanisme de Peierls qui témoigne de  ...  one 1'i (cf.  ... 
doi:10.1051/rphysap:01987002209094100 fatcat:rp4tfxs77ff5tpujfpsfa6usvm

Fasciation in Lycopersicon. I. Genetic Analysis of Dominance Modification

Q B Zielinski
1948 Genetics  
ACKNOWLEDGMENTS The major portion of this work was carried on under direction of DR. ORLAND E. WHITE, to whom much credit is due for helpful criticism.  ...  Appreciation is expressed for the valuable assistance of DR. R. A. SILOW, Visiting Professor of Genetics, THE BLANDY EXPERIMENTAL FARM, UNIVERSITY OF VIRGINIA.  ...  I n the majority of cases, however, examination of a mature fruit demonstrated fertility to be almost perfect. The gynoeciums in general seem to be the most altered and the calyx the least so.  ... 
pmid:17247288 pmcid:PMC1209415 fatcat:u56zm3f3mjhm5hgresnpb4zawe
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