363 research outputs found
Realization of the Lepton Flavor Structure from Point Interactions
We investigate a 5d gauge theory on with point interactions. The point
interactions describe extra boundary conditions and provide three generations,
the charged lepton mass hierarchy, the lepton flavor mixing and tiny
degenerated neutrino masses after choosing suitable boundary conditions and
parameters. The existence of the restriction in the flavor mixing, which
appears from the configuration of the extra dimension, is one of the features
of this model. Tiny Yukawa couplings for the neutrinos also appears without the
see-saw mechanism nor symmetries in our model. The magnitude of CP violation in
the leptons can be a prediction and is consistent with the current experimental
data.Comment: 9 pages, 3 figures, 3rd International Conference on New Frontiers in
Physic
Realization of lepton masses and mixing angles from point interactions in an extra dimension
We investigate a model on an extra dimension where plenty of effective
boundary points described by point interactions (zero-thickness branes) are
arranged. After suitably selecting the conditions on these points for each type
of five-dimensional fields, we realize the tiny active neutrino masses, the
charged lepton mass hierarchy, and lepton mixings with a CP-violating phase,
simultaneously. Not only the quark's but also the lepton's configurations are
generated in a unified way with acceptable accuracy, with neither the see-saw
mechanism nor symmetries in Yukawa couplings, by suitably setting the model
parameters, even though their flavor structures are dissimilar each other. One
remarkable point is that a complex vacuum expectation value of the
five-dimensional Higgs doublet in this model becomes the common origin of the
CP violation in both quark and lepton sectors. The model can be consistent with
the results of the precision electroweak measurements and Large Hadron Collider
experiments.Comment: 29 pages, 7 figures (v1); 28 pages, 7 figures in JHEP style file,
published version in JHEP, a subsection added, typo fixed (v2
Performance of adaptive mobile terminal selection schemes for collaborative MMSE linear MIMO detection
This paper considers a multi-machine control system using power line communication (PLC). The signal-to-noise ratio (SNR) of PLC channels has cyclostationary features synchronous to the mains voltage. As a promising candidate of the multiple access scheme for the system, this paper proposes a synchronous code division multiple access (SCDMA) scheme that uses mains voltage as its system clock. By using orthogonal codes, the communication performance of each code-channel is equalized, and the worst-case performance is improved
Impressions of the Students Who Participated in the Radioactivity Monitoring System of Farmland
PVP2008-61953 THE ULTIMATE STRENGTH OF CYLINDRICAL LIQUID STORAGE TANKS UNDER EARTHQUAKES -Seismic Capacity Test of Tanks Used in PWR Plants - (Part2 : STATIC POST-BUCKLING STRENGTH TESTS)
ABSTRACT Since 2002, Japan Nuclear Energy Safety Organization (JNES) has been carrying out seismic capacity tests for several types of equipment which significantly contribute to core damage frequency. The primary purpose of this study is to acquire the seismic capacity data of thin walled cylindrical liquid storage tanks in nuclear power plants and to establish an evaluation procedure of the ultimate strength. As for the refueling water storage tank and the condensate storage tank which are used in PWR plants, elephant-foot bulge (EFB) is the typical buckling behavior of those tanks and the primary failure mode to be focused on. In the previous study, by conducting the dynamic and static buckling tests with aluminum alloy, it was confirmed that static buckling test represents dynamic buckling and post-buckling behavior in terms of energy absorption capacity. In this study, static buckling tests with actual material were performed in order to evaluate the ultimate strength of real tanks. Although the buckling mode did not differ among materials, tests with actual materials (steel, stainless steel) resulted higher seismic capacity compared to the aluminum alloy, and inner water leakage occurred from the cracks initiated at the secondary buckling on the EFB section
Peritumoral radiomics features on preoperative thin-slice CT images can predict the spread through air spaces of lung adenocarcinoma
The spread through air spaces (STAS) is recognized as a negative prognostic factor in patients with early-stage lung adenocarcinoma. The present study aimed to develop a machine learning model for the prediction of STAS using peritumoral radiomics features extracted from preoperative CT imaging. A total of 339 patients who underwent lobectomy or limited resection for lung adenocarcinoma were included. The patients were randomly divided (3:2) into training and test cohorts. Two prediction models were created using the training cohort: a conventional model based on the tumor consolidation/tumor (C/T) ratio and a machine learning model based on peritumoral radiomics features. The areas under the curve for the two models in the testing cohort were 0.70 and 0.76, respectively ( = 0.045). The cumulative incidence of recurrence (CIR) was significantly higher in the STAS high-risk group when using the radiomics model than that in the low-risk group (44% vs. 4% at 5 years; = 0.002) in patients who underwent limited resection in the testing cohort. In contrast, the 5-year CIR was not significantly different among patients who underwent lobectomy (17% vs. 11%; = 0.469). In conclusion, the machine learning model for STAS prediction based on peritumoral radiomics features performed better than the C/T ratio model
Genetic and Epigenetic Regulation of Vernalization in Brassicaceae
A wide variation of morphological traits exists in Brassica rapa L. and Brassica oleracea L., and cultivated vegetable varieties of these species are consumed worldwide. Flowering time is an important agronomic trait in these species and varies among varieties or cultivars. Especially, leafy vegetable species need a high bolting resistance. Isolation of FLOWERING LOCUS C (FLC), one of the key genes involved in vernalization, has now provided an insight into the molecular mechanism involved in the regulation of flowering time, including the role of histone modification. In the model plant Arabidopsis thaliana, FLC plays an important role in modulating flowering time. The response to vernalization causes an increase in histone H3 lysine 27 tri-methylation (H3K27me3) that leads to reduced expression of the FLC gene. B. rapa and B. oleracea both contain several paralogs of FLC at syntenic regions identified as major flowering time and vernalization response quantitative trait loci (QTL). We introduce the recent research, not only in A. thaliana, but also in the genus Brassica from a genetic and epigenetic view point
Successful reinstitution of nivolumab in combination with corticosteroids for metastatic malignant melanoma with myasthenia gravis as an immune-related adverse event
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