1,955 research outputs found
Construction of biorthogonal wavelet vectors
AbstractThe construction of all possible biorthogonal wavelet vectors corresponding to a given biorthogonal scaling vector may not be easy as that of biorthogonal uniwavelets. In this paper, we give some theorems about the construction of biorthogonal wavelet vectors, which is followed by simple computations for constructing all parametrized biorthogonal wavelet vectors supported in [-1,1]. This approach is also suitable for the case of compactly supported orthogonal uniwavelet. Moreover, we give examples parametrizing all biorthogonal wavelet vectors corresponding to well known biorthogonal scaling vectors
Interferometric Monitoring of Gamma-ray Bright AGNs: 4C +28.07 and its Synchrotron Self-absorption Spectrum
We present the analysis results of the simultaneous multifrequency
observations of the blazar 4C +28.07. The observations were conducted by the
Interferometric Monitoring of Gamma-ray Bright Active Galactic Nuclei (iMOGABA)
program, which is a key science program of the Korean Very Long Baseline
Interferometry (VLBI) Network (KVN). Observations of the iMOGABA program for 4C
+28.07 were conducted from 16 January 2013 (MJD 56308) to 13 March 2020 (MJD
58921). We also used {\gamma}-ray data from the Fermi Large Array Telescope
(Fermi-LAT) Light Curve Repository. We divided the iMOGABA data and the
Fermi-LAT data into five periods from 0 to 4, according to the prosody of the
22 GHz data and the presence or absence of the data. In order to investigate
the characteristics of each period, the light curves were plotted and compared.
However, a peak was observed earlier than the period of a strong {\gamma}-ray
flare at 43-86 GHz in period 3 (MJD 57400-58100). Therefore, we assumed that
the minimum total CLEANed flux density for each frequency was quiescent flux
(Sq), with the variable flux (Svar) obtained by subtracting Sq from the values
of the total CLEANed flux density. We then compared the variability of the
spectral indices ({\alpha}) between adjacent frequencies. Most notably,
{\alpha}22-43 showed optically thick spectra in the absence of a strong
{\gamma}-ray flare, and when the flare appeared, {\alpha}22-43 became optically
thinner. In order to find out the characteristics of the magnetic field in the
variable region, the magnetic field strength in the synchrotron self-absorption
(BSSA) and the equipartition magnetic field strength (Beq) were obtained. We
found that BSSA is largely consistent with Beq within the uncertainty, implying
that the SSA region in the source is not significantly deviated from the
equipartition condition in the {\gamma}-ray quiescent periods.Comment: 23 pages, accepted by JKA
Distribution and Kinematics of H I through Raman He II Spectroscopy of NGC 6302
The young planetary nebula NGC 6302 is known to exhibit Raman-scattered He II
features at 6545 and 4851 Angstrom. These features are formed through inelastic
scattering of He II 1025 and 972 with hydrogen atoms in the
ground state, for which the cross sections are and
, respectively. We investigate the spectrum of
NGC 6302 archived in the ESO Science Portal. Our Gaussian line fitting analysis
shows that the Raman-scattered He II features are broader and more redshifted
than the hypothetical model Raman features that would be formed in a cold
static H I medium. We adopt a simple scattering geometry consisting of a
compact He II emission region surrounded by a H I medium to perform Monte Carlo
simulations using the radiative transfer code . Our simulations
show that the H I region is characterized by the H I column density with the random speed component expanding with a speed $v_{\rm exp}= 13{\rm\ km\
s^{-1}}M_{\rm HI} \simeq 1.0\times
10^{-2}\ {\rm M_\odot}$, pointing out the usefulness of Raman He II
spectroscopy as a tool to trace H I components.Comment: 12 pages, 8 figures, accepted for publication in Ap
Simultaneous fabrication of line defects-embedded periodic lattice by topographically assisted holographic lithography
We have demonstrated simultaneous fabrication of designed defects within a periodic structure. For rapid fabrication of periodic structures incorporating nanoscale line-defects at large area, topographically assisted holographic lithography (TAHL) technique, combining the strength of hologram lithography and phase-shift interference, was proposed. Hot-embossing method generated the photoresist patterns with vertical side walls which enabled phase-shift mask effect at the edge of patterns. Embossing temperature and relief height were crucial parameters for the successful TAHL process. Periodic holes with a diameter of 600 nm at a 1 μm-pitch incorporating 250 nm wide line-defects were obtained simultaneously
Effects of Dietary Protein and Fat Contents on Renal Function and Inflammatory Cytokines in Rats with Adriamycin-Induced Nephrotic Syndrome
The effects of dietary protein and fat on renal function-related blood and urine parameters, such as albumin, urinary protein,and inflammatory cytokines were investigated in adriamycin- (ADR) induced nephrotic syndrome rats. ADR (2 mg/kg BW) was injected i.p. weekly for six weeks to develop nephrotic syndrome; thereafter rats were fed low-protein/high-fat (LPHF) or high-protein/low-fat (HPLF) diets for five weeks. Renal function-related blood and urine parameters were measured before and after dietary intervention. Serum levels of albumin, TG, and creatinine were significantly higher in the LPHF group than in the HPLF group. Serum levels of albumin were low and urinary protein excretion protein was high in HPLF group. BUN and UUN levels were higher in the HPLF group than in the LPHF. Urinary excretion of creatinine was significantly higher in the HPLF group than in the LPHF group. Serum inflammatory cytokine levels did not differ between the two groups, however the levels of IL-6, TNF-α, and IL-13 in splenocyte supernatants were significantly higher in the LPHF group than in the HPLF group. We confirmed that protein and fat contents in diet affect renal function-related blood and urine parameters and splenocyte inflammatory cytokine levels in ADR-induced nephrotic syndrome rats
Isolated Non-Compaction of the Left Ventricle in a Patient with New-Onset Heart Failure: Morphologic and Functional Evaluation with Cardiac Multidetector Computed Tomography
We describe a case of new-onset heart failure in a patient in whom cardiac CT enabled the non-invasive diagnosis of isolated non-compaction and associated functional abnormalities of the left ventricle with the concomitant evaluation of coronary arteries. This case highlights the utility of cardiac CT for the morphological and functional evaluation of the heart as a single imaging modality
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