Results 281 to 290 of about 41,220 (298)
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Scientific American, 2011
The article discusses research by scientists at the Large Hadron Collider near Geneva, Switzerland, trying to determine why some particles created by proton collisions appear to be synchronizing their flight paths.
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The article discusses research by scientists at the Large Hadron Collider near Geneva, Switzerland, trying to determine why some particles created by proton collisions appear to be synchronizing their flight paths.
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k-Arcs, hyperovals, partial flocks and flocks
Designs, Codes and Cryptography, 1996This is a survey of results on the objects of the title. A \(k\)-arc in a projective plane is a set of \(k\) points, no three of which are collinear. In a finite projective plane of order \(q\), an oval is a \(k\)-arc with \(k= q+1\). If \(k= q+2\), the \(k\)-arc is a hyperoval. Hyperovals can exist only if \(n\) is even.
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On the sporadic semifield flock
Designs, Codes and Cryptography, 2003Let \(Q(4,q)\) denote the parabolic quadric of \(\text{ PG}(4,q)\). An ovoid of \(Q(4,q)\) is a set of \(q^2+1\) points of \(Q(4,q)\) such that no two of them are collinear (on a line of \(Q(4,q)\)). A BLT-set \(B\) is a set of \(q+1\) points of \(Q(4,q)\) such that no point of \(Q(4,q)\) is collinear with more than two points of \(B\).
CARDINALI I +2 more
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Veterinary Record, 2019
We would like to alert colleagues to differential diagnoses of congenital defects in lambs and give an update on a case of bovine viral diarrhoea virus (BVDV) in sheep, initially reported in the APHA disease surveillance, May 2018 report.1 Differential diagnoses of congenital defects in lambs that should be considered at this time include BVDV ...
George C. Russell +4 more
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We would like to alert colleagues to differential diagnoses of congenital defects in lambs and give an update on a case of bovine viral diarrhoea virus (BVDV) in sheep, initially reported in the APHA disease surveillance, May 2018 report.1 Differential diagnoses of congenital defects in lambs that should be considered at this time include BVDV ...
George C. Russell +4 more
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Flock Replacement Programs and Flock Recycling
2002A well-designed and executed replacement program is one of the best guarantees of success in the egg industry today. The choices of programs are many, with a number of different economic outcomes. The use of recycling (induced molting) may or may not be economically feasible at any given time, and must be justified based on the cost of inputs ...
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Conical flocks, partial flocks, derivation, and generalized quadrangles
Geometriae Dedicata, 1991Eine Schar eines quadratischen Kegels \(K\) mit der Spitze \(p\) im dreidimensionalen projektiven Raum \(PG(3,q)\) über dem Galoisfeld \(GF(q)\) ist eine Partition der Punktmenge \(K\backslash\{p\}\) in disjunkte Kegelschnitte. \textit{L. Bader}, \textit{G. Lundardon} und der zweite Autor [Forum Math. 2, No.
Joseph A. Thas, Stanley E. Payne
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2019 IEEE/RSJ International Conference on Intelligent Robots and Systems (IROS), 2019
Designing efficient control strategies is well studied. Due to recent technological advancements and applications to the field of robotics, exploring ways to design optimal control for multi robot systems is gaining interest. In this respect, ergodicity has been successfully applied as an effective control technique for tracking and coverage ...
Conan Veitch +2 more
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Designing efficient control strategies is well studied. Due to recent technological advancements and applications to the field of robotics, exploring ways to design optimal control for multi robot systems is gaining interest. In this respect, ergodicity has been successfully applied as an effective control technique for tracking and coverage ...
Conan Veitch +2 more
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Megabacteriosis in a flock of budgerigars
New Zealand Veterinary Journal, 1997Megabacteriosis was diagnosed as the cause of depression and wasting in a flock of breeding budgerigars in the Manawatu. Large numbers of megabacteria were detected in direct smears from mucosal scrapings of the proventriculus of two birds and in the faeces of live birds.
J.E.B. Hunter +2 more
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2015
The flocking and the rendezvous problems are the two most basic distributed robotics problems. This chapter gives a formal definition of the flocking problem for unicycles and discusses the extent to which it has been solved.
Manfredi Maggiore, Bruce A. Francis
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The flocking and the rendezvous problems are the two most basic distributed robotics problems. This chapter gives a formal definition of the flocking problem for unicycles and discusses the extent to which it has been solved.
Manfredi Maggiore, Bruce A. Francis
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Proceedings of the twenty-sixth annual symposium on Computational geometry, 2010
The convergence time for flocking in the Vicsek-Cucker-Smale model is known to be bounded by a tower-of-twos of height linear in the number of birds. We improve the height to logarithmic, which matches the known lower bound. In the process, we introduce an intriguing geometric object, the "flight net", and develop the idea of a "virtual agent." These ...
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The convergence time for flocking in the Vicsek-Cucker-Smale model is known to be bounded by a tower-of-twos of height linear in the number of birds. We improve the height to logarithmic, which matches the known lower bound. In the process, we introduce an intriguing geometric object, the "flight net", and develop the idea of a "virtual agent." These ...
openaire +2 more sources