232 research outputs found
Universal Properties of Fermi Gases in One-dimension
In this Rapid Communication, we investigate the universal properties of a
spin-polarized two-component Fermi gas in one dimension (1D) using Bethe
ansatz. We discuss the quantum phases and phase transitions by obtaining exact
results for the equation of state, the contact, the magnetic susceptibility and
the contact susceptibility, giving a precise understanding of the 1D analogue
of the Bose-Einstein condensation and Bardeen-Cooper-Schrieffer crossover in
three dimension (3D) and the associated universal magnetic properties. In
particular, we obtain the exact form of the magnetic susceptibility at low temperatures, where is the
energy gap and is the temperature. Moreover, we establish exact upper and
lower bounds for the relation between polarization and the contact for
both repulsive and attractive Fermi gases. Our findings emphasize the role of
the pair fluctuations in strongly interacting 1D fermion systems that can shed
light on higher dimensions.Comment: 4 figures, the main pape
Historical evolution of the balance sheet in the People\u27s Republic of China
This paper exhibits the historical evolution of the balance sheet in the People\u27s Republic of China. In particular, we examine three major changes in the balance sheet (which reports the financial position of an economic or business entity) since the founding of the new China in 1949 and the political, social and economic changes during this period. The content, structure and presentation of the balance sheet (or alternative forms of the statement in use) are illustrated. The political and economic factors driving its evolution are analyzed to assist readers in understanding the rapid changes in Chinese accounting over the last six decades. The implications of the Chinese experience for international accounting convergence are also briefly outlined
Dioxygen adsorption and dissociation on nitrogen doped carbon nanotubes from first principles simulation
NIH Public Access Author Manuscript Biol Psychiatry. Author manuscript; available in PMC 2011 January 1.
Published in final edited form as
Performance Analysis of Non-ideal Wireless PBFT Networks with mmWave and Terahertz Signals
Due to advantages in security and privacy, blockchain is considered a key
enabling technology to support 6G communications. Practical Byzantine Fault
Tolerance (PBFT) is seen as the most applicable consensus mechanism in
blockchain-enabled wireless networks. However, previous studies on PBFT do not
consider the channel performance of the physical layer, such as path loss and
channel fading, resulting in research results that are far from real networks.
Additionally, 6G communications will widely deploy high frequency signals such
as millimeter wave (mmWave) and terahertz (THz), while the performance of PBFT
is still unknown when these signals are transmitted in wireless PBFT networks.
Therefore, it is urgent to study the performance of non-ideal wireless PBFT
networks with mmWave and THz siganls, so as to better make PBFT play a role in
6G era. In this paper, we study and compare the performance of mmWave and THz
signals in non-ideal wireless PBFT networks, considering Rayleigh Fading (RF)
and close-in Free Space (FS) reference distance path loss. Performance is
evaluated by consensus success rate and delay. Meanwhile, we find and derive
that there is a maximum distance between two nodes that can make PBFT consensus
inevitably successful, and it is named active distance of PBFT in this paper.
The research results not only analyze the performance of non-ideal wireless
PBFT networks, but also provide an important reference for the future
transmission of mmWave and THz signals in PBFT networks.Comment: IEEE International Conference on Metaverse Computing, Networking and
Applications (MetaCom) 202
Performance Analysis and Comparison of Non-ideal Wireless PBFT and RAFT Consensus Networks in 6G Communications
Due to advantages in security and privacy, blockchain is considered a key
enabling technology to support 6G communications. Practical Byzantine Fault
Tolerance (PBFT) and RAFT are seen as the most applicable consensus mechanisms
(CMs) in blockchain-enabled wireless networks. However, previous studies on
PBFT and RAFT rarely consider the channel performance of the physical layer,
such as path loss and channel fading, resulting in research results that are
far from real networks. Additionally, 6G communications will widely deploy
high-frequency signals such as terahertz (THz) and millimeter wave (mmWave),
while performances of PBFT and RAFT are still unknown when these signals are
transmitted in wireless PBFT or RAFT networks. Therefore, it is urgent to study
the performance of non-ideal wireless PBFT and RAFT networks with THz and
mmWave signals, to better make PBFT and RAFT play a role in the 6G era. In this
paper, we study and compare the performance of THz and mmWave signals in
non-ideal wireless PBFT and RAFT networks, considering Rayleigh Fading (RF) and
close-in Free Space (FS) reference distance path loss. Performance is evaluated
by five metrics: consensus success rate, latency, throughput, reliability gain,
and energy consumption. Meanwhile, we find and derive that there is a maximum
distance between two nodes that can make CMs inevitably successful, and it is
named the active distance of CMs. The research results not only analyze the
performance of non-ideal wireless PBFT and RAFT networks, but also provide
important references for the future transmission of THz and mmWave signals in
PBFT and RAFT networks.Comment: arXiv admin note: substantial text overlap with arXiv:2303.1575
HMGA2 promotes adipogenesis by activating C/EBPβ-mediated expression of PPARγ
AbstractAdipogenesis is orchestrated by a highly ordered network of transcription factors including peroxisome-proliferator activated receptor-gamma (PPARγ) and CCAAT-enhancer binding protein (C/EBP) family proteins. High mobility group protein AT-hook 2 (HMGA2), an architectural transcription factor, has been reported to play an essential role in preadipocyte proliferation, and its overexpression has been implicated in obesity in mice and humans. However, the direct role of HMGA2 in regulating the gene expression program during adipogenesis is not known. Here, we demonstrate that HMGA2 is required for C/EBPβ-mediated expression of PPARγ, and thus promotes adipogenic differentiation. We observed a transient but marked increase of Hmga2 transcript at an early phase of differentiation of mouse 3T3-L1 preadipocytes. Importantly, Hmga2 knockdown greatly impaired adipocyte formation, while its overexpression promoted the formation of mature adipocytes. We found that HMGA2 colocalized with C/EBPβ in the nucleus and was required for the recruitment of C/EBPβ to its binding element at the Pparγ2 promoter. Accordingly, HMGA2 and C/EBPβ cooperatively enhanced the Pparγ2 promoter activity. Our results indicate that HMGA2 is an essential constituent of the adipogenic transcription factor network, and thus its function may be affected during the course of obesity
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