Results 71 to 80 of about 171,423 (192)

Frame difference families and resolvable balanced incomplete block designs

, 2018
Frame difference families, which can be obtained via a careful use of cyclotomic conditions attached to strong difference families, play an important role in direct constructions for resolvable balanced incomplete block designs.
Costa, Simone, Feng, Tao, Wang, Xiaomiao
core   +1 more source

An Inequality for Balanced Incomplete Block Designs

The Annals of Mathematical Statistics, 1961
For a resolvable balanced incomplete block design, R. C. Bose [1] obtained the inequality $b \geqq v + r - 1$, and P. M. Roy [2] and W. F. Mikhail [3] proved this inequality without the assumption of resolvability, but with the weaker assumption that $v$ is a multiple of $k$. In this note an alternative and simpler proof of Roy's theorem is given.
openaire   +2 more sources

Construction of Repairable Threshold Key Sharing Schemes Based on Resolvable Balanced Incomplete Block Design

IET Information Security
In this paper, we construct two repairable threshold schemes (RTSs) using a resolvable balanced incomplete block design (RBIBD). First, a resolvable transversal design is given by mutually orthogonal Latin squares.
Xiuli Wang, Ni Jin, Yangmei Deng
doaj   +1 more source

On the Structure of Balanced Incomplete Block Designs

The Annals of Mathematical Statistics, 1952
In this paper there are developed for the first time analytical methods for the investigation of the structure of unsymmetrical balanced incomplete block designs. Two unsymmetrical balanced incomplete block designs are proved to be impossible, and for such designs in general, inequalities are found for the number of treatments common to two blocks.
openaire   +3 more sources

A best-worst scaling survey of medical students’ perspective on implementing shared decision-making in China

BMC Medical Education, 2020
Background The objective of this study was to ascertain the importance rankings of factors affecting the implementation of shared decision-making (SDM) in medical students in China and determine whether these factors were consistent across the ...
Richard Huan XU, Lingming ZHOU, Eliza Lai-Yi WONG, Dong WANG, Guo Chun XIANG, Chao XU   +5 more
doaj   +1 more source

Hypercube Bivariate-Based Key Management for Wireless Sensor Networks [PDF]

Journal of Sciences, Islamic Republic of Iran, 2017
Wireless sensor networks are composed of very small devices, called sensor nodes,for numerous applications in the environment. In adversarial environments, the securitybecomes a crucial issue in wireless sensor networks (WSNs).
I. Qasemzadeh Kolagar, H. Haj Seyyed Javadi, M. Anzani   +2 more
doaj  

Assessing newly introduced climate change adaptation strategy packages among rural households: Evidence from Kaou local government area, Tahoua State, Niger Republic

Jàmbá, 2017
This research discusses new strategies developed and introduced by national and international partners to help farmers in building adaptative capacity against the negative externalities of climate change.
Ali M. Tabbo, Zakou Amadou
doaj   +1 more source

Robustness of Balanced Incomplete Block Designs

The Annals of Statistics, 1976
When a variety is lost or omitted from a balanced incomplete block design, the residual design is not, in general, balanced. A lower bound is obtained for the overall efficiency in this case and it is shown that the overall loss of efficiency even in the unbalanced case is small.
openaire   +3 more sources

Hybrid Key pre-distribution scheme for wireless sensor network based on combinatorial design [PDF]

Journal of Advances in Computer Engineering and Technology, 2015
Key distribution is an important problem in wireless sensor networks where sensor nodesare randomly scattered in adversarial environments.Due to the random deployment of sensors, a list of keys must be pre-distributed to each sensor node before ...
Hamid Haj Seyyed Javadi, Mohaddese Anzani   +1 more
doaj  

Confiabilidade do Teste WPPSI-R na avaliação do desenvolvimento cognitivo de pré-escolares Reliability of the WPPSI-R test in the evaluation of cognitive development in preschoolers

Cadernos de Saúde Pública, 2001
O Teste psicométrico WPPSI-R (Wechsler Preschool and Primary Scale of Intelligence - Revised) foi o instrumento de avaliação em uma pesquisa para estudar o desenvolvimento cognitivo, na idade pré-escolar, de uma população de crianças do Instituto ...
Maria Dalva Barbosa Baker Méio, Claudia S. Lopes, Rosely Sichieri, Denise Streit Morsch   +3 more
doaj   +1 more source