825 research outputs found
Bivariate Beta-LSTM
Long Short-Term Memory (LSTM) infers the long term dependency through a cell
state maintained by the input and the forget gate structures, which models a
gate output as a value in [0,1] through a sigmoid function. However, due to the
graduality of the sigmoid function, the sigmoid gate is not flexible in
representing multi-modality or skewness. Besides, the previous models lack
modeling on the correlation between the gates, which would be a new method to
adopt inductive bias for a relationship between previous and current input.
This paper proposes a new gate structure with the bivariate Beta distribution.
The proposed gate structure enables probabilistic modeling on the gates within
the LSTM cell so that the modelers can customize the cell state flow with
priors and distributions. Moreover, we theoretically show the higher upper
bound of the gradient compared to the sigmoid function, and we empirically
observed that the bivariate Beta distribution gate structure provides higher
gradient values in training. We demonstrate the effectiveness of bivariate Beta
gate structure on the sentence classification, image classification, polyphonic
music modeling, and image caption generation.Comment: AAAI 202
Electrical Investigation of the Oblique Hanle Effect in Ferromagnet/Oxide/Semiconductor Contacts
We have investigated the electrical Hanle effect with magnetic fields applied
at an oblique angle ({\theta}) to the spin direction (the oblique Hanle effect,
OHE) in CoFe/MgO/semiconductor (SC) contacts by employing a three-terminal
measurement scheme. The electrical oblique Hanle signals obtained in
CoFe/MgO/Si and CoFe/MgO/Ge contacts show clearly different line shapes
depending on the spin lifetime of the host SC. Notably, at moderate magnetic
fields, the asymptotic values of the oblique Hanle signals (in both contacts)
are consistently reduced by a factor of cos^2({\theta}) irrespective of the
bias current and temperature. These results are in good agreement with
predictions of the spin precession and relaxation model for the electrical
oblique Hanle effect. At high magnetic fields where the magnetization of CoFe
is significantly tilted from the film plane to the magnetic field direction, we
find that the observed angular dependence of voltage signals in the CoFe/MgO/Si
and CoFe/MgO/Ge contacts are well explained by the OHE, considering the
misalignment angle between the external magnetic field and the magnetization of
CoFe.Comment: 19 pages, 8 figure
Relationship Between Oral Microorganisms and Dental Caries
Objectives: The purpose of this study was to investigate the relationship between the incidences of dental caries and the amount and motility of oral microorganisms in inter proximal dental plaque. Methods: Oral microorganism samples from 240 volunteers in six different age groups were classified according to morphology using phase contrast microscopy. We observed the amount and motility of the microorganisms and examined for relationships to the incidences of dental caries. Results: There was a statistically significant difference among the age groups (p < 0.05) in the motility of cocci and bacilli and in the amount of spirilla. The decayed tooth (DT), filled tooth (FT), and decayed, missing, filled tooth (DMFT) index for all age groups were calculated as 7.5 ± 4.5, 1.9 ± 3.0, and 14.8 ± 8.1. There was weak, positive relationship between the amount of cocci and bacilli and caries incidence, regardless of age (p < 0.01). Conclusion: Determining the amount and motility of oral microorganisms is an effective method of evaluating and controlling the status of oral health
Electrical spin injection and accumulation in CoFe/MgO/Ge contacts at room temperature
We first report the all-electrical spin injection and detection in
CoFe/MgO/moderately doped n-Ge contact at room temperature (RT), employing
threeterminal Hanle measurements. A sizable spin signal of ~170 k{\Omega}
{\mu}m^2 has been observed at RT, and the analysis using a single-step
tunneling model gives a spin lifetime of ~120 ps and a spin diffusion length of
~683 nm in Ge. The observed spin signal shows asymmetric bias and temperature
dependences which are strongly related to the asymmetry of the tunneling
process.Comment: 28 pages, 5 figure
CSF Otorrhea Resulting from Osteoradionecrosis of the Temporal Bone in a Patient with Recurrent Meningioma
Osteoradionecrosis of the temporal bone is a very rare but potentially lethal complication of radiotherapy for head and neck or skull base tumors. Only two cases of osteoradionecrosis of the temporal bone complicating cerebrospinal fluid (CSF) otorrhea have been reported in the literature. This report describes a case of CSF otorrhea and osteoradionecrosis of the temporal bone in a patient with meningioma who was treated with tympanomastoid surgery and autologous fat obliteration in the mastoid
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