1,890 research outputs found
METHOD TO FACILITATE A CONCURRENT TELEPHONE CALL AND CONFERENCE MEETING
In order to answer a telephone call on a mobile telephone during an online video collaboration session or meeting, an individual must first mute their meeting, then remove their headphones, and finally answer their mobile telephone. While answering the telephone call, the individual is disconnected from the conference meeting audio channel, prohibiting them from participating in the meeting. For example, they would not know if someone in the meeting called upon them. To address such challenges, techniques are presented herein that enable the automatic switching between different communication mediums within a video collaboration environment. Aspects of the presented techniques support the automatic redirection of mobile telephone calls to a video collaboration application, may employ a mobile video collaboration application to facilitate such redirection in some instances, and, thus, may facilitate the reception of telephone calls in parallel during other meetings
Poly[[aqua(μ2-oxalato)(μ2-2-oxidopyridinium-3-carboxylato)holmium(III)] monohydrate]
In the title complex, {[Ho(C2O4)(C6H4NO3)(H2O)]·(H2O)}n, the HoIII ion is coordinated by three O atoms from two 2-oxidopyridinium-3-carboxylate ligands, four O atoms from two oxalate ligands and one water molecule in a distorted bicapped trigonal-prismatic geometry. The 2-oxidopyridinium-3-carboxylate and oxalate ligands link the HoIII ions into a layer in (100). These layers are further connected by intermolecular O—H⋯O hydrogen bonds involving the coordinated water molecules to assemble a three-dimensional supramolecular network. The uncoordinated water molecule is involved in N—H⋯O and O—H⋯O hydrogen bonds within the layer
Poly[bis(4,4′-bipyridine)(μ3-4,4′-dicarboxybiphenyl-3,3′-dicarboxylato)iron(II)]
In the polymeric title complex, [Fe(C16H8O8)(C10H8N2)2]n, the iron(II) cation is coordinated by four O atoms from three different 4,4′-dicarboxybiphenyl-3,3′-dicarboxylate ligands and two N atoms from two 4,4′-bipyridine ligands in a distorted octahedral geometry. The 4,4′-dicarboxybiphenyl-3,3′-dicarboxylate ligands bridge adjacent cations, forming chains parallel to the c axis. The chains are further connected by intermolecular O—H⋯N hydrogen bonds, forming two-dimensional supramolecular layers parallel to (010)
APNet2: High-quality and High-efficiency Neural Vocoder with Direct Prediction of Amplitude and Phase Spectra
In our previous work, we proposed a neural vocoder called APNet, which
directly predicts speech amplitude and phase spectra with a 5 ms frame shift in
parallel from the input acoustic features, and then reconstructs the 16 kHz
speech waveform using inverse short-time Fourier transform (ISTFT). APNet
demonstrates the capability to generate synthesized speech of comparable
quality to the HiFi-GAN vocoder but with a considerably improved inference
speed. However, the performance of the APNet vocoder is constrained by the
waveform sampling rate and spectral frame shift, limiting its practicality for
high-quality speech synthesis. Therefore, this paper proposes an improved
iteration of APNet, named APNet2. The proposed APNet2 vocoder adopts ConvNeXt
v2 as the backbone network for amplitude and phase predictions, expecting to
enhance the modeling capability. Additionally, we introduce a multi-resolution
discriminator (MRD) into the GAN-based losses and optimize the form of certain
losses. At a common configuration with a waveform sampling rate of 22.05 kHz
and spectral frame shift of 256 points (i.e., approximately 11.6ms), our
proposed APNet2 vocoder outperformed the original APNet and Vocos vocoders in
terms of synthesized speech quality. The synthesized speech quality of APNet2
is also comparable to that of HiFi-GAN and iSTFTNet, while offering a
significantly faster inference speed
Interference Avoidance via Adaptive Wavelet Packet Modulation in Wireless Communication Systems
Abstract-This paper addresses the problem of adaptive modulation/demodulation scheme in the presence of interferences for wireless communication systems. We developed an adaptive modulation/demodulation scheme which modifies users' signature waveforms by maximizing the signal to interference ratio based on wavelet packet analysis and the state-of-art interference avoidance algorithms
Antimicrobial susceptibility patterns among Escherichia coli urinary isolates from community-onset health care-associated urinary tract infection
Urinary tract infection (UTI) is traditionally classified as community-acquired (CA) and hospital-acquired (HA). Community-onset health care-associated (HCA) infection is a new category that has gained increasing attention. The study aimed to compare the disk susceptibility of nonrepetitive Escherichia coli urinary isolates from HCA-UTI (n = 100) with that of E. coli isolates from CA-UTI (n = 85) and HA-UTI (n = 106). We found that the susceptibility pattern of HCA-UTI E. coli isolates was similar to that of HA-UTI E. coli isolates, but significantly different from that of CA-UTI E. coli isolates. In particular, the proportion of extended-spectrum β-lactamase-producing isolates was significantly higher in HCA-UTI than that in CA-UTI (30.0% vs. 3.5%, p < 0.001). We recommend that when treating HCA-UTI, it is necessary to take urine cultures for susceptibility testing to guide definite antibiotic therapy
Control of Formation-Flying Multi-Element Space Interferometers with Direct Interferometer-Output Feedback
The long-baseline space interferometer concept involving formation flying of multiple spacecrafts holds great promise as future space missions for high-resolution imagery. A major challenge of obtaining high-quality interferometric synthesized images from long-baseline space interferometers is to accurately control these spacecraft and their optics payloads in the specified configuration. Our research focuses on the determination of the optical errors to achieve fine control of long-baseline space interferometers without resorting to additional sensing equipment. We present a suite of estimation tools that can effectively extract from the raw interferometric image relative x/y, piston translational and tip/tilt deviations at the exit pupil aperture. The use of these error estimates in achieving control of the interferometer elements is demonstrated using simulated as well as laboratory-collected interferometric stellar images
Control of Formation-Flying Multi-Element Space Interferometers with Direct Interferometer-Output Feedback
The long-baseline space interferometer concept involving formation flying of multiple spacecraft holds great promise as future space missions for high-resolution imagery. A major challenge of obtaining high-quality interferometric synthesized images from long-baseline space interferometers is to accurately control these spacecraft and their optics payloads in the specified configuration. Our research focuses on the determination of the optical errors to achieve fine control of long-baseline space interferometers without resorting to additional sensing equipment. We present a suite of estimation tools that can effectively extract from the raw interferometric image relative x/y, piston translational and tip/tilt deviations at the exit pupil aperture. The use of these error estimates in achieving control of the interferometer elements is demonstrated using simulated as well as laboratory-collected interferometric stellar images
The adaptor protein SH2B1β reduces hydrogen peroxide-induced cell death in PC12 cells and hippocampal neurons
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