459 research outputs found
Resposta da cultura do feijoeiro à adubação nitrogenada e à inoculação com rizóbio.
bitstream/item/67364/1/34249.pdfOrganizado por: Fábio Martins Mercante e Oscar Fontão de Lima Filho. RELARE
Single crystal field-effect transistors based on an organic selenium-containing semiconductor
We report on the fabrication and characterization of single crystal
field-effect transistors (FETs) based on diphenylbenzo diselenophene
(DPh-BDSe). These organic field-effect transistors (OFETs) function as
p-channel accumulation-mode devices. At room temperature, for the best devices,
the threshold voltage is less than -7V and charge carrier mobility is nearly
gate bias independent, ranging from 1cm2/Vs to 1.5 cm2/Vs depending on the
source-drain bias. Mobility is increased slightly by cooling below room
temperature and decreases below 280 K
Avaliação de clones de mandioca visando o processamento industrial em Dourados, MS.
Publicado também na: RAT: Revista Raízes e Amidos Tropicais, v. 3, 2007. (SEP 036)
Isolamento e seleção de rizóbios de solos de Mato Grosso Do Sul para inoculação em feijoeiro comum
bitstream/item/66207/1/32003.pdfFERTBI
Influence of synaptic depression on memory storage capacity
Synaptic efficacy between neurons is known to change within a short time
scale dynamically. Neurophysiological experiments show that high-frequency
presynaptic inputs decrease synaptic efficacy between neurons. This phenomenon
is called synaptic depression, a short term synaptic plasticity. Many
researchers have investigated how the synaptic depression affects the memory
storage capacity. However, the noise has not been taken into consideration in
their analysis. By introducing "temperature", which controls the level of the
noise, into an update rule of neurons, we investigate the effects of synaptic
depression on the memory storage capacity in the presence of the noise. We
analytically compute the storage capacity by using a statistical mechanics
technique called Self Consistent Signal to Noise Analysis (SCSNA). We find that
the synaptic depression decreases the storage capacity in the case of finite
temperature in contrast to the case of the low temperature limit, where the
storage capacity does not change
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