3,193 research outputs found
Implications of Flavored CP Symmetry of Leptons
We discuss gauge models incorporating flavored CP symmetry (called
CP in the text) in combination with invariance to
understand neutrino mixings and discuss their phenomenological implications. We
show that viable leptogenesis in this setting requires that the lightest
right-handed neutrino mass must be between GeV and for effective
two hierarchical right-handed neutrinos, leptogenesis takes place only in a
narrower range of GeV. A multi-Higgs realization of
this idea implies that there must be a pseudoscalar Higgs boson with mass less
than 300 GeV. Generically, the vev alignment problem can be naturally avoided
in our setting.Comment: 34pp. v3: matches journal versio
Fano-Kondo effect in a two-level system with triple quantum dots: shot noise characteristics
We theoretically compare transport properties of Fano-Kondo effect with those
of Fano effect. We focus on shot noise characteristics of a triple quantum dot
(QD) system in the Fano-Kondo region at zero temperature, and discuss the
effect of strong electric correlation in QDs. We found that the modulation of
the Fano dip is strongly affected by the on-site Coulomb interaction in QDs.Comment: 4 pages, 6figure
Differential Expression Of Gap Junction mRNAs And Proteins In The Developing Murine Kidney And In Experimentally Induced Nephric Mesenchymes
The expression of three gap junction (GJ) proteins, alpha-1 (Cx43), beta-1 (Cx32), and beta-2 (Cx26), and their transcripts were examined during the ontogeny of the mouse and rat kidney. These proteins were expressed in two non-overlapping patterns. The alpha-1 GJ protein was first observed in mesenchymal cells in the 12-day mouse kidney. By day 14 and thereafter, the ai protein was detected in the transient S-shaped bodies, but not in the podocytes of the maturing glomeruli. After birth the antigen was retained in a small subset of secretory tubules.The beta-1 and beta-2 GJ proteins were similar in their developmental patterns. They were first detected in a small subset of secretory tubules in the subcortical zone of day 17 embryos. These tubules were identified by immunohistochemical markers to be proximal. At birth, practically all proximal tubules expressed the two antigens.This analysis of GJ proteins was consistent with the results of S1 nuclease protection assays showing that, while the alpha-1 mRNA appeared early during kidney development and declined around birth, the two beta mRNAs appeared later and became intensified during the last days of intrauterine development.In experimentally induced metanephric mesenchymes, a transient expression of the alpha-1 GJ protein was seen during the segregation of the tubular anlagen. beta-1 and beta-2 GJ proteins were not detected in such induced mesenchymes cultivated up to 7 days.These observations provide evidence for the cell-specific utilization of different GJ genes during different stages of kidney organogenesis. The alpha-1 gene is activated during the early segregation of the secretory tubule and might contribute to its compartmentalization, while the beta-1 and beta-2 gene products are not detected until advanced stages of development. The latter gene products might be correlated with the physiological activity of the proximal tubules in vivo, as they are not expressed in experimentally induced tubules detectable with markers for proximal tubules
The Minimum Total Mass of MACHOs and Halo Models of the Galaxy
If the density distribution \rho (r) of MACHOs is spherically symmetric with
respect to the Galactic center, it is shown that the minimal total mass
M_{min}^{{ MACHO}} of the MACHOs is 1.7\times 10^{10}\sol \tau_{-6.7}^{{ LMC}}
where \tau_{-6.7}^{{ LMC}} is the optical depth (\tau^{{ LMC}}) toward the
Large Magellanic Cloud (LMC) in the unit of 2\times 10^{-7}. If \rho (r) is a
decreasing function of r, it is proved that M_{min}^{{ MACHO}} is 5.6\times
10^{10}\sol \tau_{-6.7}^{{ LMC}}. Several spherical and axially symmetric halo
models of the Galaxy with a few free parameters are also considered. It is
found that M_{min}^{{ MACHO}} ranges from 5.6\times 10^{10}\sol \tau_{-6.7}^{{
LMC}} to \sim 3 \times 10^{11}\sol \tau_{-6.7}^{{ LMC}}. For general case, the
minimal column density \Sigma_{min}^{{ MACHO}} of MACHOs is obtained as
\Sigma_{min}^{{ MACHO}} =25 \sol { pc}^{-2}\tau_{-6.7}^{{ LMC}}. If the clump
of MACHOs exist only halfway between LMC and the sun, M_{min}^{{ MACHO}} is
1.5\times 10^9\sol. This shows that the total mass of MACHOs is smaller than 5
\times 10^{10}\sol , i.e. \sim 10\% of the mass of the halo inside LMC, either
if the density distribution of MACHOs is unusual or \tau^{{ LMC}}\ll 2\times
10^{-7}.Comment: 5 pages, 5 Encapsulated PostScript figures, Latex, Accepted for
publication in Apj. Letter
Sensitivity and concurrent validity of the Japanese version of the Euthymia scale: a clinimetric analysis
Background: Euthymia is characterized by the lack of mood disorders, the presence of positive affects, psychological flexibility and well-being, a unifying outlook on life, and resistance to stress. The Euthymia Scale (ES) is a 10-item self-rating clinimetric index assessing euthymia. Objectives: The present study was conducted to examine the clinimetric sensitivity and concurrent validity of the Japanese version of the Euthymia Scale (ES-J). Methods: A cross-sectional online survey was conducted. The Mini-International Neuropsychiatric Interview was used to determine the presence of past or current major depressive episodes (MDE). The clinimetric sensitivity was evaluated using the Analysis of Variance (ANOVA). Pearson’s correlation coefficients were performed to examine the concurrent validity of the ES-J. Results: A total of 1030 eligible participants completed the survey. The ES-J differentiated healthy subjects from complete remission (i.e., those with a past history of MDE without current MDE) (p < 0.001), from those with past or current history of MDE (p < 0.001), subjects with current MDE from those with sub-threshold symptoms of depression (p < 0.001), and healthy participants from subjects with moderate to severe symptoms of psychological distress (p < 0.001). The associations between the ES-J and measures of psychological well-being, resilience, life satisfaction, and social support were significantly positive (0.353 < r < 0.666, p < 0.001). A negative relationship between the ES-J and measures of psychological distress was also found (r = − 0.595, p < 0.001). Conclusions: The findings of the present study indicated that the ES-J is a valid and highly sensitive clinimetric index, which can be used as a screening measure in the clinical process of assessment of recovery, particularly when symptoms are expected to be mild and/or when dealing with subclinical symptoms of psychological distress and depression. The findings of this study also support the use of the ES-J to detect vulnerability to depression and to identify subjects at higher risk of relapse
Study of electro-absorption effects in 1300nm In(Ga)As/GaAs quantum dot materials
No abstract available
Anatomical Changes in the Skin of Rattus Norvegicus After Artificial UV Exposure
Acute and subacute artificial UV exposure to albino rats exhibit morphological and histo-anatomical changes in the skin of albino rat. The anatomical changes include hyperplasia, hyperkeratosis, hypergranulosis and acanthosis beside numerical changes in keratinocytes, Langerhans, melanocytes and fibroblast seen after acute and subacute artificial UVB exposure
Folded modes in the infrared spectra of the spin-Peierls phase of CuGeO_3
Polarized far-infrared transmittance spectra of CuGeO_3 single crystals were
measured at different temperatures (6K < T < 300K). Two spectral lines, at
284.2 cm-1 in E||c polarization and at 311.7 cm-1 in E||b polarization, appear
at the temperature of the spin-Peierls transition and grow in intensity with
decreasing temperature. Both of them are, most probably, folded modes of the
dimerized lattice. We discuss a possible role of the spin-phonon interaction in
the formation of the 311.7 cm-1 feature.Comment: 4 pages, 5 figures, 1 table; Submitted to Phys.Rev.B Second revision.
Figures and text were slightly change
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Emission estimates of selected volatile organic compounds from tropical savanna burning in northern Australia
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