19,462 research outputs found
Power-law statistics and stellar rotational velocities in the Pleiades
In this paper we will show that, the non-gaussian statistics framework based
on the Kaniadakis statistics is more appropriate to fit the observed
distributions of projected rotational velocity measurements of stars in the
Pleiades open cluster. To this end, we compare the results from the
and -distributions with the Maxwellian.Comment: 13 pages, 3 figure
Statistical assessment of feeding corn with higher oil content to piglets in the starter phase
The aim of this study was to assess the digestibility coefficients (DC) of corn [maize] with an oil content above 3.46% and its effects on the performance of piglets when fed as dry grain (DG) and as rehydrated corn grain silage (RCGS). In Experiment I, 15 piglets (22.51 + 2.39 kg) were allocated to a reference diet (RD) and to two test diets in which corn in the RD was replaced with DG or RCGS. There were five replications of each treatment. Experiment II involved 36 piglets (14.76 ± 2.72 kg), which were assigned to a control diet with common corn grain and to diets in which DG or RCGS replaced the common corn. There were six replications of each treatment. Data were analysed with four statistical models. Model 1 included only the effect of treatment. Model 2 was similar to Model 1 but included initial bodyweight as a covariate. Model 3 was similar to model 1 but included the interaction of diet and period. Model 4 was similar to Model 3 but included the covariate. The more complicated models were generally preferred to Model 1 as they controlled more of the nuisance variation. Feeding a diet that contained RCGS reduced feed intake and improved feed conversion ratio (FCR)
Giant meningioma in paranasal sinuses: an atypical nasal occupation
info:eu-repo/semantics/publishedVersio
Stability of blood gases when refrigerated
Background: Blood gas analysis is a widely used procedure. In clinical
practice, the physicians may not always have a blood gas analyzer
in their proximity. Not infrequently, blood gas samples are stored
in a fridge or on ice and read retrospectively. Continued anaerobic
and aerobic metabolism in the blood may alter blood gases in the
interval between drawing arterial blood and its analysis, which
may cause a fall in the PaO2 and pH and a rise in the PaCO2.
Methods: Two sets of arterial blood samples were obtained from
hospitalized patients. After the initial analysis, one sample from
each patient was put in raw ice within a specimen bag (0 to +1
oC) and the other in the fridge (+4 to +8 oC). These samples were
submitted to serial analysis at 30 minutes, 1 hour and 2 hours after
the initial analysis.
Results: Two hundred arterial blood gas results from 25 patients
were analysed. The mean values of PaO2, PaCO2, HCO3-, Na+, K+,
Ca2+ and lactate at 0 minutes, 30 minutes, 1 hour and 2 hours were
not signifi cantly different between the two alternatives of storage.
However, within each group, signifi cant changes were found over
time for PaO2, K+, Na+, Ca2+ and lactate.
Conclusions: When using plastic syringes, arterial blood gas analysis
should be processed shortly after collecting the sample. Despite the
fact that low temperatures can slow down the metabolism, neither
the ice nor the fridge preserved all the sample parameters
Comparison of analyses types in carrot experiment: square lattice versus randomized blocks design.
The objective of this study was to evaluate the efficiency of lattice design by three different statistical methodologies to verify the efficiency of this design in carrot experiment
Caracterização dos solos e adobes usados na construção em Camabatela, Angola
No âmbito do projecto “Construção com Formação”, no qual se
pretende construir uma nova escola na missão de Camabatela, na
província do Kwanza Norte, em Angola, fazendo uso dos materiais
e técnicas de construção correntes no local, foram realizados
ensaios de caracterização dos adobes produzidos localmente, e dos
solos utilizados na sua produção e na própria construção, em
argamassas e rebocos. Devido aos limitados meios disponíveis,
recorreu-se a estratégias simples e expeditas de ensaio.
Foram analisados diferentes solos, tendo-se começado por
realizar a identificação do tipo de cada solo com base no odor,
aparência e toque. Seguidamente, amostras destes solos foram
submetidas ao ‘teste da garrafa’, ao ‘teste do charuto’, e ao ‘teste
da pastilha’. Com base nestes testes identificou-se, dentre os
solos estudados, os mais adequados para o fabrico do adobe.
Caracterizou-se também o comportamento dos adobes produzidos
localmente quando em contacto com água, e estimou-se, através
da realização de ensaios mecânicos, a sua resistência à
compressão e à tracção (por flexão). Com base nos ensaios
realizados foram tecidas recomendações gerais para o adequado
fabrico e protecção dos blocos de adobe.
Este artigo descreve, sucintamente, os procedimentos seguidos
na realização dos vários ensaios, os resultados obtidos, e a
análise dos mesmos
- …