3,987 research outputs found
Sobre o impacto social e sua avaliação em organizaçÔes baseadas na favela
Não basta ter boas intençÔes para realizar intervençÔes sociais nos territórios de favelas. Neste post, Daniel S. Lacerda discute a importùncia de avaliar o impacto social em seu contexto, explicando por que as ONGs instaladas em favelas devem garantir que suas açÔes e objetivos correspondam às demandas do espaço onde atuam
On social impact and its appraisal in favela-based organisations
t is not enough to have good intentions when deploying social interventions in favela territories. In this post, Daniel S. Lacerda discusses the importance of assessing social impact in context, explaining why favela-based NGOs must ensure their actions and objectives respond to the material space where they operate
Transplante alogĂ©nico de cĂ©lulas estaminais em doentes com sĂndrome mielodisplĂĄsica: anĂĄlise de acordo com o Ăndice de PrognĂłstico Internacional
© Ordem dos MĂ©dicosWe determined the outcome of patients with myelodysplastic syndrome (MDS) and secondary acute myeloid leukemia (sAML) after allogeneic stem cell transplantation according to their international prognostic scoring system (IPSS) risk categories at diagnosis. A total of 11 females and 7 males, with a median age of 45 years, were transplanted. With a median follow-up of 60 months, the 6-year actuarial event-free survival (EFS) for Less Advanced (Low and Intermediate-1 risk IPSS) and Advanced (Intermediate-2 and High risk IPSS) MDS was 71.4% and 43.6%, respectively (p=0.002). We did not observe a difference in EFS depending on cytogenetics at diagnosis (good risk 53.8% Vs intermediate and high risk 53.3%, p=ns), neither on the type of conditioning regimen used (myeloablative 50% Vs reduced intensity 52.2%, p=ns). Our results support that IPSS score at diagnosis may be used to predict EFS in patients with MDS undergoing allogeneic SCT.Neste estudo avaliĂĄmos o valor preditivo do Ăndice prognĂłstico internacional (IPSS) na altura do diagnĂłstico em doentes com sĂndrome mielodisplĂĄsica (SMD) e leucemia mielĂłide aguda secundĂĄria submetidos a transplante alogĂ©nico de cĂ©lulas estaminais. Foram transplantados um total de 11 mulheres e sete homens, com uma mediana de idades de 45 anos. Com um seguimento mediano de 60 meses, a sobrevivĂȘncia livre de eventos aos 6 anos nos doentes com doença menos avançada (IPSS Risco Baixo e IntermĂ©dio 1) e com doença avançada (IPSS IntermĂ©dio 2 e Alto Risco) foi de 71.4% e 43.6%, respectivamente (p=0.002). NĂŁo observĂĄmos diferenças significativas na sobrevivĂȘncia livre de eventos de acordo com a anĂĄlise citogenĂ©tica na altura do diagnĂłstico (risco bom 53,8% VS risco intermĂ©dio e alto 53,3%, p=ns) nem com o tipo de regime de condicionamento utilizado (mieloablativo 50% VS intensidade reduzida 52,2%, p=ns). Os nossos resultados demonstram que o IPSS na altura do diagnĂłstico pode ser utilizado para predizer a sobrevivĂȘncia livre de eventos em doentes com SMD submetidos a transplante alogĂ©nico de cĂ©lulas estaminaisinfo:eu-repo/semantics/publishedVersio
The formation of the solar system
The solar system started to form about 4.56 Gyr ago and despite the long
intervening time span, there still exist several clues about its formation. The
three major sources for this information are meteorites, the present solar
system structure and the planet-forming systems around young stars. In this
introduction we give an overview of the current understanding of the solar
system formation from all these different research fields. This includes the
question of the lifetime of the solar protoplanetary disc, the different stages
of planet formation, their duration, and their relative importance. We consider
whether meteorite evidence and observations of protoplanetary discs point in
the same direction. This will tell us whether our solar system had a typical
formation history or an exceptional one. There are also many indications that
the solar system formed as part of a star cluster. Here we examine the types of
cluster the Sun could have formed in, especially whether its stellar density
was at any stage high enough to influence the properties of today's solar
system. The likelihood of identifying siblings of the Sun is discussed.
Finally, the possible dynamical evolution of the solar system since its
formation and its future are considered.Comment: 36 pages, 7 figures, invited review in Physica Script
Bose-Einstein Condensation of S = 1 Ni spin degrees of freedom in NiCl2-4SC(NH2)2
It has recently been suggested that the organic compound
NiCl-4SC(NH) (DTN) exhibits Bose-Einstein Condensation (BEC) of the
Ni spin degrees of freedom for fields applied along the tetragonal c-axis. The
Ni spins exhibit 3D XY-type antiferromagnetic order above a field-induced
quantum critical point at T. The Ni spin fluid can be
characterized as a system of effective bosons with a hard-core repulsive
interaction in which the antiferromagnetic state corresponds to a Bose-Einstein
condensate (BEC) of the phase coherent Ni spin system. We have
investigated the the high-field phase diagram and the occurrence of BEC in DTN
by means of specific heat and magnetocaloric effect measurements to dilution
refrigerator temperatures. Our results indicate that a key prediction of BEC is
satisfied; the magnetic field-temperature quantum phase transition line
approaches a power-law at low temperatures,
with an exponent at the quantum critical point,
consistent with the BEC theory prediction of .Comment: 4 pages, 4 figure
High-magnetic field lattice length changes in URu2Si2
We report high magnetic field (up to 45 T) c-axis thermal expansion and
magnetostriction experiments on URu2Si2 single crystals. The sample length
change associated with the transition to the hidden order phase becomes
increasingly discontinous as the magnetic field is raised above 25 T. The
re-entrant ordered phase III is clearly observed in both the thermal expansion
and magnetostriction above 36 T, in good agreement with previous results. The
sample length is also discontinuous at the boundaries of this phase, mainly at
the upper boundary. A change in the sign of the coefficient of
thermal-expansion is observed at the metamagnetic transition (B_M = 38 T) which
is likely related to the existence of a quantum critical end point.Comment: 5 pages, 4 figures, to be published in PR
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