Results 11 to 20 of about 729,697 (285)

Incidence Bounds for Block Designs [PDF]

open access: yesSIAM Journal on Discrete Mathematics, 2016
We prove three theorems giving extremal bounds on the incidence structures determined by subsets of the points and blocks of a balanced incomplete block design (BIBD).
Lund, Ben, Saraf, Shubhangi
core   +2 more sources

Exact bounds for (λ,n)–stable 0-1 matrices. [PDF]

open access: yesTransactions on Combinatorics, 2020
Consider a v × v (0, 1) matrix A with exactly k ones in each row and each column. A is (λ, n)–stable, if it does not contain any λ × n submatrix with exactly one 0. If A is (λ, n)–stable, λ, n ≥ 2, then under suitable conditions on A, v ≥ k k(n−1)+(λ−2) .
Trevor Bruen
doaj   +1 more source

Construction of Tm-type and Tm-assisted PBIB designs

open access: yesRevstat Statistical Journal, 2022
Two-associate class triangular designs have been explored greatly but the Tm-type PBIB designs (m ≥ 3) largely remains unexplored. The paper is written with an objective to construct a new series of Tm-type PBIB designs and to derive some more series of
Parneet Kaur , Davinder Kumar Garg
doaj   +1 more source

Statistical Methods to Support Difficult Diagnoses

open access: yesDiagnostics, 2021
Far too often, one meets patients who went for years or even decades from doctor to doctor without obtaining a valid diagnosis. This brings pain to millions of patients and their families, not to speak of the enormous costs.
Guenter F. Pilz   +3 more
doaj   +1 more source

Block-Graceful Designs

open access: yesJournal of Mathematics, 2023
In this article, we adapt the edge-graceful graph labeling definition into block designs and define a block design V,B with V=v and B=b as block-graceful if there exists a bijection f:B⟶1,2,…,b such that the induced mapping f+:V⟶Zv given by f+x=∑x∈AA ...
Dilara Erdemir, Emre Kolotoğlu
doaj   +1 more source

Inhalation-modulated detection of olfactory BOLD responses in the human brain

open access: yesFrontiers in Neuroimaging, 2023
IntroductionIn contrast to other sensory domains, detection of primary olfactory processes using functional magnetic resonance imaging has proven to be notably challenging with conventional block designs.
Aino-Lotta I. Alahäivälä   +6 more
doaj   +1 more source

Construction of Some Circular Regular Graph Designs in Blocks of Size Four Using Cyclic Shifts

open access: yesJournal of Statistical Theory and Applications (JSTA), 2020
Circular regular graph designs play an important role in the design of experiments where most of the balanced incomplete block designs require a large number of blocks.
Rashid Ahmed   +3 more
doaj   +1 more source

A Statistical Model for the 2-Part Balanced Incomplete Block Design

open access: yesUMYU Scientifica Journal, 2023
Multi-part Balanced Incomplete Block Designs combine many orthogonal balanced incomplete block designs in the same block. The design has been used to study cancer trials with medical centres as blocks.
Naziru Isah Muhammad   +2 more
doaj   +1 more source

Pairwise transitive 2-designs [PDF]

open access: yes, 2015
We classify the pairwise transitive 2-designs, that is, 2-designs such that a group of automorphisms is transitive on the following five sets of ordered pairs: point-pairs, incident point-block pairs, non-incident point-block pairs, intersecting block ...
Devillers, Alice, Praeger, Cheryl E.
core   +1 more source

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