3,701 research outputs found
Fundamental Cycle of a Periodic Box-Ball System
We investigate a soliton cellular automaton (Box-Ball system) with periodic
boundary conditions. Since the cellular automaton is a deterministic dynamical
system that takes only a finite number of states, it will exhibit periodic
motion. We determine its fundamental cycle for a given initial state.Comment: 28 pages, 6 figure
Axiomatic Bargaining Theory on Opportunity Assignments
This paper discusses issues of axiomatic bargaining problems over opportunity assignments. The fair arbitrator uses the principle of "equal opportunity" for all players to make the recommendation on re- source allocations. A framework in such a context is developed and several classical solutions to standard bargaining problems are reformulated and axiomatically characterized. Working Paper 06-4
The Bethe ansatz in a periodic box-ball system and the ultradiscrete Riemann theta function
Vertex models with quantum group symmetry give rise to integrable cellular
automata at q=0. We study a prototype example known as the periodic box-ball
system. The initial value problem is solved in terms of an ultradiscrete
analogue of the Riemann theta function whose period matrix originates in the
Bethe ansatz at q=0.Comment: 11 pages, 1 figur
Equianalytic and equisingular families of curves on surfaces
We consider flat families of reduced curves on a smooth surface S such that
each member C has the same number of singularities of fixed singularity types
and the corresponding (locally closed) subscheme H of the Hilbert scheme of S.
We are mainly concerned with analytic resp. topological singularity types and
give a sufficient condition for the smoothness of H (at C). Our results for
S=P^2 seem to be quite sharp for families of cuves of small degree d.Comment: LaTeX v 2.0
Atividade ovicida in vitro do extrato de Ingá (Inga edulis) em nematódeos gastrintestinais de ovinos.
Manual de técnicas laboratoriais e de campo para a realização de ensaios experimentais em parasitologia veterinária: foco em helmintos gastrintestinais de ruminantes.
Coleta de amostras fecais; Contagem de ovos por grama de fezes (OPG); Coprocultura; Identificação de larvas infectantes (l3) de nematódeos de ruminantes; Recuperação de larvas da pastagem; Criopreservação de larvas infectantes em nitrogênio líquido; Teste de eclodibilidade de ovos - TEO; Montagem de lâminas de helmintos; Coleta de helmintos adultos em necropsia de ovinos; Lista de soluçõesbitstream/item/136882/1/DT-148-online.pd
Noninvasive rapid detection of metabolic adaptation in activated human T lymphocytes by hyperpolarized <sup>13</sup>C magnetic resonance.
The metabolic shift induced in human CD4 <sup>+</sup> T lymphocytes by stimulation is characterized by an upregulation of glycolysis, leading to an augmentation in lactate production. This adaptation has already been highlighted with various techniques and reported in several previous studies. We herein propose a method to rapidly and noninvasively detect the associated increase in flux from pyruvate to lactate catalyzed by lactate dehydrogenase using hyperpolarized <sup>13</sup> C magnetic resonance, a technique which can be used for in vivo imaging. It was shown that the conversion of hyperpolarized <sup>13</sup> C-pyruvate to <sup>13</sup> C-lactate during the one-minute measurement increased by a mean factor of 3.6 in T cells stimulated for 5 days as compared to resting T cells. This method can be extended to other metabolic substrates and is therefore a powerful tool to noninvasively analyze T cell metabolism, possibly in vivo
Combinatorial Bethe ansatz and ultradiscrete Riemann theta function with rational characteristics
The U_q(\hat{sl}_2) vertex model at q=0 with periodic boundary condition is
an integrable cellular automaton in one-dimension. By the combinatorial Bethe
ansatz, the initial value problem is solved for arbitrary states in terms of an
ultradiscrete analogue of the Riemann theta function with rational
characteristics.Comment: 9 page
Cyanobacteria use micro-optics to sense light direction
Bacterial phototaxis was first recognized over a century ago, but the method by which such small cells can sense the direction of illumination has remained puzzling. The unicellular cyanobacterium Synechocystis sp. PCC 6803 moves with Type IV pili and measures light intensity and color with a range of photoreceptors. Here, we show that individual Synechocystis cells do not respond to a spatiotemporal gradient in light intensity, but rather they directly and accurately sense the position of a light source. We show that directional light sensing is possible because Synechocystis cells act as spherical microlenses, allowing the cell to see a light source and move towards it. A high-resolution image of the light source is focused on the edge of the cell opposite to the source, triggering movement away from the focused spot. Spherical cyanobacteria are probably the world’s smallest and oldest example of a camera eye
Diagnóstico veterinário por ensaio imunoadsorvente ligado a enzima: revisão atualizada.
Histórico; Princípio do Teste; Elementos Básicos do Teste; Suporte (Fase Sólida); Tempo de Incubação e Temperatura; Concentração e Volume; Controles; Bloqueio; Conjugado, enzima, substrato e cromógeno; Tampões e reagentes; Equipamentos; Tipos de Teste de ELISA; Interpretação de resultados; ELISA indireto em apenas uma diluição; Titulação por ELISA indireto; Lista de soluções comumente usadas em ELISAbitstream/item/135387/1/DT-145-online.pd
- …