Journal of Combinatorial Designs (J Combin Des)
Journal description
The Journal of Combinatorial Designs is an international journal devoted to the timely publication of the most influential papers in the area of combinatorial design theory. All topics in design theory and in which design theory has important applications are covered including: block designs tdesigns pairwise balanced designs and group divisible designs Latin squares quasigroups and related algebras computational methods in design theory construction methods applications in computer science experimental design theory and coding theory graph decompositions factorizations and designtheoretic techniques in graph theory and extremal combinatorics finite geometry and its relation with design theory. algebraic aspects of design theory. Researchers and scientists can depend on the Journal of Combinatorial Designs for the most recent developments in this rapidly growing field and to provide a forum for both theoretical research and applications.
Current impact factor: 0.66
Impact Factor Rankings
2015 Impact Factor  Available summer 2016 

2014 Impact Factor  0.657 
2013 Impact Factor  0.493 
2012 Impact Factor  0.687 
2011 Impact Factor  0.62 
2010 Impact Factor  0.662 
2009 Impact Factor  0.709 
2008 Impact Factor  0.456 
2007 Impact Factor  0.355 
2006 Impact Factor  0.757 
2005 Impact Factor  0.493 
2004 Impact Factor  0.662 
2003 Impact Factor  0.541 
2002 Impact Factor  0.74 
2001 Impact Factor  0.407 
2000 Impact Factor  0.408 
1999 Impact Factor  0.6 
1998 Impact Factor  0.27 
Impact factor over time
Additional details
5year impact  0.61 

Cited halflife  9.20 
Immediacy index  0.27 
Eigenfactor  0.00 
Article influence  0.75 
Website  Journal of Combinatorial Designs website 
Other titles  Journal of combinatorial designs (Online), Journal of combinatorial designs 
ISSN  15206610 
OCLC  41616630 
Material type  Document, Periodical, Internet resource 
Document type  Internet Resource, Computer File, Journal / Magazine / Newspaper 
Publisher details
 Preprint
 Author can archive a preprint version
 Postprint
 Author cannot archive a postprint version
 Restrictions
 12 months embargo
 Conditions
 Some journals have separate policies, please check with each journal directly
 On author's personal website, institutional repositories, arXiv, AgEcon, PhilPapers, PubMed Central, RePEc or Social Science Research Network
 Author's preprint may not be updated with Publisher's Version/PDF
 Author's preprint must acknowledge acceptance for publication
 NonCommercial
 Publisher's version/PDF cannot be used
 Publisher source must be acknowledged with citation
 Must link to publisher version with set statement (see policy)
 If OnlineOpen is available, BBSRC, EPSRC, MRC, NERC and STFC authors, may selfarchive after 12 months
 If OnlineOpen is available, AHRC and ESRC authors, may selfarchive after 24 months
 Publisher last contacted on 07/08/2014
 This policy is an exception to the default policies of 'Wiley'
 Classificationyellow
Publications in this journal

Article: Large Sets of Wrapped K–K Hamilton Cycle Decompositions of Complete Bipartite 3Uniform Hypergraphs
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ABSTRACT: Using the Katona–Kierstead (K–K) definition of a Hamilton cycle in a uniform hypergraph, we investigate the existence of wrapped K–K Hamilton cycle decompositions of the complete bipartite 3uniform hypergraph and their large sets, settling their existence whenever n is prime.Journal of Combinatorial Designs 11/2015; 23(11). DOI:10.1002/jcd.21423 
Article: A Doubling Construction for 3Uniform Friendship Hypergraphs with the Universal Pairs Property
Journal of Combinatorial Designs 11/2015; DOI:10.1002/jcd.21509  [Show abstract] [Hide abstract]
ABSTRACT: : A Kakeya set in the linear representation , a nonsingular conic, is the point set covered by a set of lines, one through each point of . In this article, we classify the small Kakeya sets in . The smallest Kakeya sets have size , and all Kakeya sets with weight less than are classified: there are approximately types.Journal of Combinatorial Designs 09/2015; DOI:10.1002/jcd.21507  [Show abstract] [Hide abstract]
ABSTRACT: A triple system is a collection of b blocks, each of size three, on a set of v points. It is jbalanced when every two jsets of points appear in numbers of blocks that are as nearly equal as possible, and well balanced when it is jbalanced for each . Wellbalanced systems arise in the minimization of variance in file availability in distributed file systems. It is shown that when a triple system that is 2balanced and 3balanced exists, so does one that is well balanced. Using known and new results on variants of group divisible designs, constructions for wellbalanced triple systems are developed. Using these, the spectrum of pairs for which such a wellbalanced triple system exists is determined completely.Journal of Combinatorial Designs 09/2015; DOI:10.1002/jcd.21508  [Show abstract] [Hide abstract]
ABSTRACT: A characterization of cocyclic Hadamard matrices is described, depending on the notions of distributions, ingredients, and recipes. In particular, these notions lead to the establishment of some bounds on the number and distribution of 2coboundaries over to use and the way in which they have to be combined in order to obtain a cocyclic Hadamard matrix. Exhaustive searches have been performed, so that the table in p. 132 in A. Baliga, K. J. Horadam, Australas. J. Combin., 11 (1995), 123–134 is corrected and completed. Furthermore, we identify four different operations on the set of coboundaries defining cocyclic matrices, which preserve orthogonality. We split the set of Hadamard matrices into disjoint orbits, define representatives for them, and take advantage of this fact to compute them in an easier way than the usual purely exhaustive way, in terms of diagrams. Let be the set of cocyclic Hadamard matrices over having a symmetric diagram. We also prove that the set of Williamsontype matrices is a subset of of size .Journal of Combinatorial Designs 08/2015; 23(8):352368. DOI:10.1002/jcd.21406  [Show abstract] [Hide abstract]
ABSTRACT: We present a construction for minimal blocking sets with respect to spaces in , the dimensional projective space over the finite field of order . The construction relies on the use of blocking cones in the field reduced representation of , extending the wellknown construction of linear blocking sets. This construction is inspired by the construction for minimal blocking sets with respect to the hyperplanes by Mazzocca, Polverino, and Storme (the MPSconstruction); we show that for a suitable choice of the blocking cone over a planar blocking set, we obtain larger blocking sets than the ones obtained from planar blocking sets in F. Mazzocca and O. Polverino, J Algebraic Combin 24(1) (2006), 61–81. Furthermore, we show that every minimal blocking set with respect to the hyperplanes in can be obtained by applying field reduction to a minimal blocking set with respect to spaces in . We end by relating these constructions to the linearity conjecture for small minimal blocking sets. We show that if a small minimal blocking set is constructed from the MPSconstructionthen it is of Rédeitype, whereas a small minimal blocking set arises from our cone construction if and only if it is linear.Journal of Combinatorial Designs 07/2015; 24(1):n/an/a. DOI:10.1002/jcd.21432  [Show abstract] [Hide abstract]
ABSTRACT: Suppose that and . We construct a Latin square of order n with the following properties: has no proper subsquares of order 3 or more.has exactly one intercalate (subsquare of order 2).When the intercalate is replaced by the other possible subsquare on the same symbols, the resulting Latin square is in the same species as . Hence generalizes the square that Sade famously found to complete Norton's enumeration of Latin squares of order 7. In particular, is what is known as a selfswitching Latin square and possesses a nearautoparatopism.Journal of Combinatorial Designs 06/2015; DOI:10.1002/jcd.21430  [Show abstract] [Hide abstract]
ABSTRACT: Grooming uniform alltoall traffic in optical (SONET) rings with grooming ratio C requires the determination of a decomposition of the complete graph into subgraphs each having at most C edges. The drop cost of such a grooming is the total number of vertices of nonzero degree in these subgraphs, and the grooming is optimal when the drop cost is minimum. The determination of optimal Cgroomings has been considered for , and completely solved for . For , it has been shown that the lower bound for the drop cost of an optimal Cgrooming can be attained for almost all orders with 5 exceptions and 308 possible exceptions. For , there are infinitely many unsettled orders; especially the case is far from complete. In this paper, we show that the lower bound for the drop cost of a 6grooming can be attained for almost all orders by reducing the 308 possible exceptions to 3, and that the lower bound for the drop cost of a 7grooming can be attained for almost all orders with seven exceptions and 16 possible exceptions. Moreover, for the unsettled orders, we give upper bounds for the minimum drop costs.Journal of Combinatorial Designs 05/2015; 23(9). DOI:10.1002/jcd.21428  [Show abstract] [Hide abstract]
ABSTRACT: Let be a nontrivial 2 symmetric design admitting a flagtransitive, pointprimitive automorphism group G of almost simple type with sporadic socle. We prove that there are up to isomorphism six designs, and must be one of the following: a 2(144, 66, 30) design with or , a 2(176, 50, 14) design with , a 2(176, 126, 90) design with or , or a 2(14,080, 12,636, 11,340) design with .Journal of Combinatorial Designs 04/2015; 23(4):140150. DOI:10.1002/jcd.21385  [Show abstract] [Hide abstract]
ABSTRACT: In this paper, we determine the necessary and sufficient conditions for the existence of an equitably ℓcolorable balanced incomplete block design for any positive integer . In particular, we present a method for constructing nontrivial equitably ℓcolorable BIBDs and prove that these examples are the only nontrivial examples that exist. We also observe that every equitable ℓcoloring of a BIBD yields both an equalized ℓcoloring and a proper 2coloring of the same BIBD.Journal of Combinatorial Designs 04/2015; DOI:10.1002/jcd.21427  [Show abstract] [Hide abstract]
ABSTRACT: An is a triple , where X is a set of points, is a partition of X into m disjoint sets of size n and is a set of 4element transverses of , such that each 3element transverse of is contained in exactly one of them. If the full automorphism group of an admits an automorphism α consisting of n cycles of length m (resp. m cycles of length n), then this is called mcyclic (resp. semicyclic). Further, if all blockorbits of an mcyclic (resp. semicyclic) are full, then it is called strictly cyclic. In this paper, we construct some infinite classes of strictly mcyclic and semicyclic , and use them to give new infinite classes of perfect twodimensional optical orthogonal codes with maximum collision parameter and AMOPPTS/AMOPPW property.Journal of Combinatorial Designs 02/2015; DOI:10.1002/jcd.21424 
Article: Cube Designs
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ABSTRACT: A cube design of order v, or a CUBE(v), is a decomposition of all cyclicly oriented quadruples of a vset into oriented cubes. A CUBE(v) design is unoriented if its cubes can be paired so that the cubes in each pair are related by reflection through the center. A cube design is degenerate if it has repeated points on one of its cubes, otherwise it is nondegenerate.We show that a nondegenerate CUBE(v) design exists for all integers , and that an unoriented nondegenerate CUBE(v) design exists if and only if and or . A degenerate example of a CUBE(v) design is also given for each integer .Journal of Combinatorial Designs 02/2015; DOI:10.1002/jcd.21422  [Show abstract] [Hide abstract]
ABSTRACT: Every abelian group of even order with a noncyclic Sylow 2subgroup is known to be Rsequenceable except possibly when the Sylow 2subgroup has order 8. We construct an Rsequencing for many groups with elementary abelian Sylow 2subgroups of order 8 and use this to show that all such groups of order other than 8 also have terraces. This completes the proof of Bailey's Conjecture in the abelian case: all abelian groups other than the noncyclic elementary abelian 2groups have terraces. For odd orders it is known that abelian groups are Rsequenceable except possibly those with noncyclic Sylow 3subgroups. We show how the theory of narcissistic terraces can be exploited to find Rsequencings for many such groups, including infinitely many groups with each possible of Sylow 3subgroup type of exponent at most 312and all groups whose Sylow 3subgroups are of the form or .Journal of Combinatorial Designs 01/2015; 23(1). DOI:10.1002/jcd.21396
Data provided are for informational purposes only. Although carefully collected, accuracy cannot be guaranteed. The impact factor represents a rough estimation of the journal's impact factor and does not reflect the actual current impact factor. Publisher conditions are provided by RoMEO. Differing provisions from the publisher's actual policy or licence agreement may be applicable.