Results 21 to 30 of about 1,182,141 (298)

Incremental Construction of Motorcycle Graphs

open access: yesAlgorithms, 2022
We show that the so-called motorcycle graph of a planar polygon can be constructed by a randomized incremental algorithm that is simple and experimentally fast.
Franz Aurenhammer   +2 more
doaj   +1 more source

Randomized Optimization: a Probabilistic Analysis [PDF]

open access: yesDiscrete Mathematics & Theoretical Computer Science, 2007
In 1999, Chan proposed an algorithm to solve a given optimization problem: express the solution as the minimum of the solutions of several subproblems and apply the classical randomized algorithm for finding the minimum of $r$ numbers.
Jean Cardinal   +2 more
doaj   +1 more source

How Did CNBSS Influence Guidelines for So Long and What Can That Teach Us?

open access: yesCurrent Oncology, 2022
The biased randomization and other quality concerns about the Canadian National Breast Screening Studies (CNBSS) were documented and criticized for decades, even by several individuals very close to the research.
Shushiela Appavoo
doaj   +1 more source

Random walks with random velocities

open access: yesPhysical Review E, 2008
We consider a random walk model that takes into account the velocity distribution of random walkers. Random motion with alternating velocities is inherent to various physical and biological systems. Moreover, the velocity distribution is often the first characteristic that is experimentally accessible. Here, we derive transport equations describing the
Zaburdaev, V.   +2 more
openaire   +4 more sources

Randomness and Inference in Medical and Public Health Research

open access: yesJournal of the Georgia Public Health Association, 2017
Background: The purpose of this study was to provide a basis for describing the types of randomness used and statistical inferences reported in the medical and public health research literature.
Matt Hayat, Tom Knapp
doaj   +1 more source

Estimating ecosystem naturalness using Benford’s Law and Generalized Benford’s Law

open access: yesTurkish Journal of Forestry, 2021
A new method was proposed to estimate ecosystem naturalness. Three species-plot (S Χ A) datasets were used. Those data sets belong to Sultan mountain sub-district (BS) (60 Χ 96) Dedegül mountain sub-district (BD) (89 Χ 119) and, Beyşehir Watershed (B ...
Kürşad Özkan
doaj   +1 more source

Patient and parent perspectives on being invited to join a trial of night-time only versus full-time bracing for adolescent idiopathic scoliosis: a qualitative study

open access: yesBone & Joint Open
Aims: The Bracing Adolescent Idiopathic Scoliosis (BASIS) study is a randomized controlled non-inferiority pragmatic trial of ‘full-time bracing’ (FTB) compared to ‘night-time bracing’ (NTB) for the treatment of adolescent idiopathic scoliosis (AIS). We
Frances C. Sherratt   +9 more
doaj   +1 more source

The Entry of Randomized Assignment into the Social Sciences

open access: yesJournal of Causal Inference, 2019
Although the concept of randomized assignment in order to control for extraneous confounding factors reaches back hundreds of years, the first empirical use appears to have been in an 1835 trial of homeopathic medicine.
Jamison Julian C.
doaj   +1 more source

Sampling-Based Robot Motion Planning: A Review

open access: yesIEEE Access, 2014
Motion planning is a fundamental research area in robotics. Sampling-based methods offer an efficient solution for what is otherwise a rather challenging dilemma of path planning.
Mohamed Elbanhawi, Milan Simic
doaj   +1 more source

Random Walks in Random Environment [PDF]

open access: yesJournal of Physics A: Mathematical and General, 2006
Random walks in random environments (RWRE's) have been a source of surprising phenomena and challenging problems since they began to be studied in the 70's. Hitting times and, more recently, certain regeneration structures, have played a major role in our understanding of RWRE's. We review these and provide some hints on current research directions and
openaire   +3 more sources

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