2,140 research outputs found
Effect of sound strength and IACC on perception of listener envelopment in concert halls
ABSTRACT The effects of sound strength (G) on perceived listener envelopment (LEV) at audience positions were investigated in different concert halls. The impulse responses were measured in the halls with different size. Anechoic violin sound was convolved with the impulse responses and the sound pressure level (SPL) was varied from 68.0 to 75.5 dBA in 1.5 dB step. A total of 18 sound stimuli with different interaural cross correlation (IACC) values of 0.13, 0.37, and 0.57 were provided for auditory tests. Results of subjective experiments indicated that LEV was not realized when SPL was less than around 70dBA even though IACC was 0.13. This means that the effect of IACC on LEV perception could be relatively small when the SPL is not large enough
Monoclinic and Correlated Metal Phase in VO_2 as Evidence of the Mott Transition: Coherent Phonon Analysis
In femtosecond pump-probe measurements, the appearance of coherent phonon
oscillations at 4.5 THz and 6.0 THz indicating the rutile metal phase of VO_2
does not occur simultaneously with the first-order metal-insulator transition
(MIT) near 68^oC. The monoclinic and correlated metal(MCM) phase between the
MIT and the structural phase transition (SPT) is generated by a photo-assisted
hole excitation which is evidence of the Mott transition. The SPT between the
MCM phase and the rutile metal phase occurs due to subsequent Joule heating.
The MCM phase can be regarded as an intermediate non-equilibrium state.Comment: 4 pages, 2 figure
Transcatheter Arterial Embolization as Treatment for a Life-Threatening Retroperitoneal Hemorrhage Complicating Heparin Therapy
Spontaneous retroperitoneal hemorrhage is a distinct clinical entity that can present in the absence of specific underlying pathology or trauma and is typically associated with anticoagulation therapy. We report a case of a 74-year-old female patient with a cerebral infarction related to atrial fibrillation who developed a spontaneous lumbar arterial hemorrhage complicating heparin therapy. The diagnosis was suggested by a computed tomography scan and confirmed by angiography. She was treated successfully with transcatheter embolization
Data Diversification Analysis on Data Preprocessing
A statistical analysis to examine the diversity distribution resulting from two different approaches: The first one, the standard approach, is a baseline augmentation approach where a random augmentation is applied to each sample in each epoch independently; The second one, the random batch approach, is another new augmentation approach designed where a random augmentation is applied to each tiny-batch in each epoch independently, and which samples are in the same tiny-batch is random and independent across all epochs
Association between Workplace Risk Factor Exposure and Sleep Disturbance: Analysis of the 2nd Korean Working Conditions Survey
OBJECTIVES: Sleep is essential for human beings to live and work properly. This study was conducted to investigate the relationship between occupational exposures to workplace risk factors and sleep disturbance in Korean workers. METHODS: The data were drawn from the second Korean Working Conditions Survey (KWCS); a total of 7,112 paid workers were analyzed. The independent variables were occupational exposures such as physical, chemical, biological, and psychosocial risk factor in the workplace, and psychosocial risk factor was divided into five categories (job demand, job control, social support, job insecurity, lack of reward). We estimated the relationship between various occupational exposures and sleep disturbance using multivariate logistic regression analysis. RESULTS: The results showed that people who exposed to physical, chemical, biological, and psychosocial (high job demand, inadequate social support, lack of reward) risk factors were more likely to increase the risk of sleep disturbance. Furthermore, after adjusting for general and occupational characteristics, we found significant positive associations between exposures to physical (odds ratios [OR] 1.47, 95% confidence interval [CI] 1.05-2.07) and psychosocial (high job demand (OR 2.93, 95% CI 2.16-3.98), inadequate social support (OR 1.57, 95% CI 1.14-2.15), lack of reward (OR 1.45, 95% CI 1.08-1.96)) risk factors and sleep disturbance. CONCLUSION: These results suggest that occupational exposures to physical and psychosocial workplace risk factors are significantly related to sleep disturbance
Molecular genetic study of novel biomarkers for early diagnosis of oral squamous cell carcinoma
Objectives: Early detection and treatment of an oral squamous cell carcinoma (OSCC) is critical because of its
rapid growth, frequent lymph-node metastasis, and poor prognosis. However, no clinically-valuable methods of
early diagnosis exist, and genetic analysis of OSCCs has yielded no biomarkers.
Study
D
esign: We investigated the expression of genes associated with inflammation in OSCCs via a quantitative
reverse transcriptase polymerase chain reaction (qRT-PCR) analysis of microarray data. Tumor and normal tissues
from five patients with an OSCC were used for microarray analysis. Differentially-expressed genes, identified using permutation, local pooled error (LPE), t-tests, and significance analysis of microarrays (SAM), were selected
as candidate genetic markers.
Results: Two groups corresponding to tissue identity were evident, implying that their differentially-expressed
genes represented biological differences between tissues. Fifteen genes were identified using the Student’s paired
t-test (
p<
0.05)
and the SAM, with a false discovery rate of less than 0.02. Based on gene expression, these 15
genes can be used to classify an OSCC. A genetic analysis of functional networks and ontologies, validated by
using a qRT-PCR analysis of the tissue samples, identified four genes, ADAM15, CDC7, IL12RB2 and TNFRSF8,
that demonstrated excellent concordance with the microarray data.
Conclusions: Our study demonstrated that four genes (ADAM15, CDC7, IL12RB2 and TNFRSF8) had potential
as novel biomarkers for the diagnosis and the treatment of an OSCC
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