Interlocked permutations

The zero-error capacity of channels with a countably infinite input alphabet formally generalises Shannon's classical problem about the capacity of discrete memoryless channels. We solve the problem for three particular channels. Our results are purely combinatorial and in line with previous work of the third author about permutation capacity.Comment: 8 page

Zero-error capacity of binary channels with memory

We begin a systematic study of the problem of the zero--error capacity of noisy binary channels with memory and solve some of the non--trivial cases.Comment: 10 pages. This paper is the revised version of our previous paper having the same title, published on ArXiV on February 3, 2014. We complete Theorem 2 of the previous version by showing here that our previous construction is asymptotically optimal. This proves that the isometric triangles yield different capacities. The new manuscript differs from the old one by the addition of one more pag

Reconstructing ρ0\rho^0 and ω\omega mesons from non-leptonic decays in C+C at 2AGeV

We predict transverse and longitudinal momentum spectra and yields of $\rho^0$ and $\omega$ mesons reconstructed from hadron correlations in C+C reactions at 2~AGeV. The rapidity and $p_T$ distributions for reconstructable $\rho^0$ mesons differs strongly from the primary distribution, while the $\omega$'s distributions are only weakly modified. We discuss the temporal and spatial distributions of the particles emitted in the hadron channel. Finally, we report on the mass shift of the $\rho^0$ due to its coupling to the $N^*(1520)$, which is observable in both the di-lepton and $\pi\pi$ channel. Our calculations can be tested with the Hades experiment at GSI, Darmstadt

Experimental Highlights of the RHIC Program

Experimental highlights of the RHIC program are reviewed

Production at High pTp_T in Central Au+Au and p+pp+p collisions at sNN=200\sqrt{s_{_{NN}}} = 200 GeV in STAR

he $\rho^0$ production at high-$p_T$ (5.0 $\leq p_T \leq$ 10.0 GeV/$c$) measured in minimum bias $p+p$, Au+Au and central Au+Au collisions in the STAR detector are presented. The $\rho^0/\pi$ ratio measured in $p+p$ is compared to PYTHIA calculations as a test of perturbative quantum chromodynamics (pQCD) that describes reasonably well particle production from hard processes. The $\rho^0$ nuclear modification factor are also presented. In $p+p$ collisions, charged pions and (anti-)protons are measured in the range 5.0 $\leq p_T \leq$ 15.0 GeV/$c$ and the anti-particle to particle ratio and the baryon to meson ratios of these hadrons are discussed.Comment: 4 pages, 8 figures, proccedings for QM200

Skewincidence

We introduce a new class of problems lying halfway between questions about graph capacity and intersection. We say that two binary sequences x and y of the same length have a skewincidence if there is a coordinate i for which x_i=y_{i+1}=1 or vice versa. We give rather sharp bounds on the maximum number of binary sequences of length n any pair of which has a skewincidence

INSTITUTOS FEDERAIS E COMMUNITY COLLEGES AMERICANOS, O FOMENTO À PESQUISA CIENTÍFICA COMO CAMINHO PARA O SUCESSO

Os desafios apresentados pelo século XXI exigem das instituições de ensino uma adaptação a essa nova realidade onde o conhecimento aparece como o alicerce da economia, a qual demanda a formação de profissionais mais flexíveis e capacitados. Baseado nestes aspectos, o fomento à pesquisa aparece como uma forma das instituições se adaptarem a este novo momento. Por meio de uma abordagem exploratória e qualitativa este artigo teve como objetivo comparar os Institutos Federais de Educação, Ciência e Tecnologia brasileiros e os Community Colleges (Faculdades Comunitárias) americanos, a partir dos modelos de desenvolvimento de atividades de pesquisa científica praticados por essas instituições. Partindo-se de dados coletados na literatura, realizou-se um levantamento histórico destas instituições, definindo seus principais objetivos e público-alvo, bem como a caracterização do corpo docente e as fontes de recursos orçamentários e de financiamento da pesquisa. Também, foram descritos os principais modelos de pesquisa adotados pelas Faculdades Comunitárias americanas e seus resultados quanto à geração de conhecimento comparadas ao modelo tradicional das Universidades de pesquisa adotado pelos institutos federais. Como resultado ressalta-se a perspectiva de adaptação de alguns desses modelos exógenos à realidade dos institutos federais como forma de incrementar o processo de formação profissional e adaptar este tipo de instituição à economia do conhecimento

rho0 Production in Cu+Cu Collisions at 200 and 62.4 GeV in STAR

The results on rho(770)0 production in Cu+Cu collisions at 200 and 62.4 GeV in STAR are presented. The rho0 is measured via its hadronic decay channel and used as a sensitive tool to examine the collision dynamics in the hadronic medium.Comment: 4 pages, 6 figures, to appear at the proceedings of the 21st International Conference on Ultrarelativistic Nucleus-Nucleus Collisions, QM2009, March 30 - April 4, Knoxville, T