1,805 research outputs found
An investigation of children's peer trust across culture: is the composition of peer trust universal?
The components of children's trust in same-gender peers (trust beliefs, ascribed trustworthiness, and dyadic reciprocal trust) were examined in samples of 8- to 11-year-olds from the UK, Italy, and Japan. Trust was assessed by children's ratings of the extent to which same-gender classmates kept promises and kept secrets. Social relations analyses confirmed that children from each country showed significant: (a) actor variance demonstrating reliable individual differences in trust beliefs, (b) partner variance demonstrating reliable individual differences in ascribed trustworthiness, and (c ) relationship variance demonstrating unique relationships between interaction partners. Cultural differences in trust beliefs and ascribed trustworthiness also emerged and these differences were attributed to the tendency for children from cultures that value societal goals to share personal information with the peer group
Um modelo orientado a objetos para o cálculo da estimativa da área acessÃvel a solvente.
Estimativa da ASA. Descrição do método utilizado. Modelo orientado a objetos proposto.bitstream/CNPTIA/10655/1/doc46.pdfAcesso em: 29 maio 2008
Effects of high-energy ionizing particles on the Si:As mid-infrared detector array on board the AKARI satellite
We evaluate the effects of high-energy ionizing particles on the Si:As
impurity band conduction (IBC) mid-infrared detector on board AKARI, the
Japanese infrared astronomical satellite. IBC-type detectors are known to be
little influenced by ionizing radiation. However we find that the detector is
significantly affected by in-orbit ionizing radiation even after spikes induced
by ionizing particles are removed. The effects are described as changes mostly
in the offset of detector output, but not in the gain. We conclude that the
changes in the offset are caused mainly by increase in dark current. We
establish a method to correct these ionizing radiation effects. The method is
essential to improve the quality and to increase the sky coverage of the AKARI
mid-infrared all-sky-survey map.Comment: 16 pages, 8 figures, 1 table, accepted for publication in PAS
Dilepton and Photon Emission Rates from a Hadronic Gas III
We extend our early analyses of the dilepton and photon emission rates from a
hadronic gas to account for strange mesons using a density expansion. The
emission rates are reduced to vacuum correlation functions using three-flavor
chiral reduction formulas, and the latters are assessed in terms of empirical
data. Using a fire-ball, we compare our results to the low and intermediate
mass dilepton data available from CERN. Our results suggest that a baryon free
hadronic gas does not account for the excess of low mass dielectrons observed
at CERES but do well in accounting for the intermediate dimuons at HELIOS. The
same observations apply to the recent low and high dielectron rates from
CERES.Comment: 12 pages LaTeX, 11 eps figure
Dilepton and Photon Emission Rates from a Hadronic Gas
We analyze the dilepton and photon emission rates from a hadronic gas using
chiral reduction formulas and a virial expansion. The emission rates are
reduced to pertinent vacuum correlation functions, most of which can be
assessed from experiment. Our results indicate that in the low mass region, the
dilepton and photon rates are enhanced compared to most of the calculations
using chiral Lagrangians. The enhancement is further increased through a finite
pion chemical potential. An estimate of the emission rates is also made using
Haag's expansion for the electromagnetic current. The relevance of these
results to dilepton and photon emission rates in heavy-ion collisions is
discussed.Comment: 7 pages, LaTeX using revTeX, 6 figures imbedded in text. Figures
slightly changed, text left unchange
Detecção de erros de montagens em regiões gênicas.
Muitos genomas ainda apresentam erros de montagem. Tais erros são particularmente graves se ocorrerem em regiões gênicas, pois muitos trabalhos cientÃficos se concentram exatamente nessas regiões por razões óbvias. Uma forma de tentar identificar erros de montagens em regiões gênicas é utilizar sequencias adquiras de forma independente, como, por exemplo bases de ESTs ou bases de Full length cDNA (FlcDNA). O foco deste trabalho é propor uma metodologia de Bioinformática que utiliza bibliotecas de FlcDNA para detectar tais erros
An indirect evidence of the Fibonacci String model for DNA repetitive sequence growth.
In this work, we present some results that are indirect evidences of Fibonacci String model fro DNA repetitive sequences growth.X-Meeting 2007
Análise de agrupamento de dados de expressão gênica na Rede Genômica Animal.
O objetivo deste trabalho é apresentar a análise de agrupamento de dados de expressão gênica, conforme realizada no escopo da ?Rede Genômica Animal?. Na seção 2, são apresentados conceitos básicos sobre análises de agrupamento. Em particular, os algoritmos de agrupamento utilizados nessas análises compreendem aqueles mais conhecidos, como k-means, SOM e agrupamento hierárquico. A plataforma de análise escolhida para realização das análises de agrupamento na ?Rede Genômica Animal? é o ambiente de análise estatÃstica R (R DEVELOPMENT CORE TEAM, 2010) e o projeto Bioconductor (GENTLEMAN et al., 2004). Assim, na seção 3 é apresentado um exemplo completo de análise de agrupamento e seu respectivo script R.bitstream/item/32433/1/ct101-10-4.pd
Genes e vias metabólicas envolvidos nos mecanismos de resistência e susceptibilidade de bovinos infestados com carrapato Rhipicephalus microplus.
Entre os principais problemas da pecuária brasileira está o parasitismo pelo carrapato bovino, Rhipicephalus microplus, acarretando prejuÃzos de mais de dois bilhões de dólares por ano. A compreensão dos mecanismos envolvidos na resistência genética aos carrapatos é importante porque pode auxiliar a identificação de genes ou marcadores para essa caracterÃstica. O objetivo deste trabalho foi identificar genes e vias regulatórias envolvidos na discriminação de grupos de bovinos resistentes e sensÃveis submetidos à infestação artificial com o carrapato Rhipicephalus microplus
- …