1,079 research outputs found
Orbits in symmetric spaces, II
Suppose is fully symmetric Banach function space on or
or a fully symmetric Banach sequence space. We give necessary and
sufficient conditions on so that its orbit is the closed
convex hull of its extreme points. We also give an application to symmetrically
normed ideals of compact operators on a Hilbert space
Observations of microquasars with the MAGIC telescope
We report on the results from the observations in very high energy band (VHE,
E_gamma > 100GeV) of the black hole X-ray binary (BHXB) Cygnus X-1. The
observations were performed with the MAGIC telescope, for a total of 40 hours
during 26 nights, spanning the period between June and November 2006. We report
on the results of the searches for steady and variable gamma-ray signals,
including the first experimental evidence for an intense flare, of duration
between 1.5 and 24 hours.Comment: Contribution to the 30th ICRC, Merida Mexico, July 2007 on behalf of
the MAGIC Collaboratio
QUALITY OF DOCUMENTATION PROCESSES AT THE UNIVERSITY: THE IMPLEMENTATION OF THE PRINCIPLE OF «ONE WINDOW»
В статье раскрываются вопросы обеспечения и повышения качества документационного, административного и информационного сопровождения обучающихся вузаThe article reveals the questions ensure and improve the quality of documentation, administrative and information support of students of the Universit
Gamma rays from microquasars Cygnus X-1 and Cygnus X-3
Gamma-ray observations of microquasars at high and very-high energies can
provide valuable information of the acceleration processes inside the jets, the
jet-environment interaction and the disk-jet coupling. Two high-mass
microquasars have been deeply studied to shed light on these aspects: Cygnus
X-1 and Cygnus X-3. Both systems display the canonical hard and soft X-ray
spectral states of black hole transients, where the radiation is dominated by
non-thermal emission from the corona and jets and by thermal emission from the
disk, respectively. Here, we report on the detection of Cygnus X-1 above 60 MeV
using 7.5 yr of Pass8 Fermi-LAT data, correlated with the hard X-ray state. A
hint of orbital flux modulation was also found, as the source is only detected
in phases around the compact object superior conjunction. We conclude that the
high-energy gamma-ray emission from Cygnus X-1 is most likely associated with
jets and its detection allow us to constrain the production site. Moreover, we
include in the discussion the final results of a MAGIC long-term campaign on
Cygnus X-1 that reaches almost 100 hr of observations at different X-ray
states. On the other hand, during summer 2016, Cygnus X-3 underwent a flaring
activity period in radio and high-energy gamma rays, similar to the one that
led to its detection in the high-energy regime in 2009. MAGIC performed
comprehensive follow-up observations for a total of about 70 hr. We discuss our
results in a multi-wavelength context.Comment: Proceedings of the 35th International Cosmic Ray Conference (ICRC
2017), Bexco, Busan, Korea (arXiv:1708.05153
Identification of novel pesticides for use against glasshouse invertebrate pests in UK tomatoes and peppers
To inform current and future pesticide availability to glasshouse vegetable growers, the current project trialled more than twenty products, including existing industry standards, against four key pests of glasshouse tomatoes and bell peppers. These included experimental conventional chemical pesticides as well as alternative biopesticide and biorational products based on phytochemicals, microbials and physically-acting substances. The results suggest that certain biopesticide products, particularly botanicals, provide good levels of pest control, with the same being true of experimental conventional chemical pesticides not yet recommended for use against these pests on these crops. Efforts are on-going to ensure that results of the current project translate to industry benefit via new pesticide approvals
Uma Proposta de Boas Práticas para o Ensino Colaborativo de Programação de Computadores
A programação de computadores ´e uma atividade complexa, que envolve saberes associados a diversas áreas de conhecimento. Por isso, os professores desta área precisam estar continuamente, desenvolvendo formas de ensinar e ajudar os alunos a reduzirem a dificuldade no aprendizado. Este trabalho realizou uma survey, em formato de questionário, que foi enviada para programadores, visando entender como estes aprenderam a programar, quais as formas de ensino que mais auxiliaram neste processo e o que eles mudariam na forma como foram ensinados a programar. Este trabalho apresenta uma proposta de sugestões para apoio aos professores na tarefa de estruturação das aulas de programação. Esta proposta considera o ensino colaborativo de programação através de ferramentas adequadas para a aplicação de cada uma das práticas propostas
Caracterização morfológica, produtividade e rendimento comercial de cultivares de alho.
O objetivo do presente trabalho foi avaliar 20 cultivares de alho, sendo 12 seminobres e 8 nobres, quanto ao rendimento agronômico quando cultivadas no Centro-Sul do estado do Paraná
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