bluuebunny/crossref_metadata_2025_split huggingface dataset:
In situ self-assembly fabrication of ultrathin sheet-like CuS modified g–C3N4 heterojunction and its enhanced visible-light photocatalytic performance
Authors: Liu Zheyuan , Qiu Lingfang , Wen Ke , Cao Banpeng , Li Ping , Tang Yi , Chen Xiangshu , Kita Hidetoshi , Duo Shuwang 
Published: September 2022

Abstract
Photocatalysts with heterojunction structure have been widely used for organic degradation. In this study, CuS/g-C3N4 heterojunction was formed by in situ self-assembly via a simply hydrothermal method. A series of characterizations were applied to analyzing the morphology, structure, optical properties and photo-induced electron transfer of the samples. The effect of CuS mass ratio in the CuS/g-C3N4 composite on methyl blue (10 mg l−1) degradation under visible-light illumination was discussed. When CuS mass ratio was 60%, CuS/g-C3N4 behaved the highest photocatalytic efficiency which is 17 times higher than that of pure g-C3N4, and the optimal heterojunction exhibited promising photocatalytic stability as well. The synthesized CuS/g-C3N4 with intimate contact and promising photocatalytic performance provides important implications on analogous researches on g-C3N4-based heterojunctions for photocatalytic applications.
On the Riccati dynamics of 2D EulerPoisson equations with attractive forcing
Authors: Lee Yongki 
Published: September 2022

Abstract
The Euler–Poisson (EP) system describes the dynamic behaviour of many important physical flows. In this work, a Riccati system that governs pressureless two-dimensional EP equations is studied. The evolution of divergence is governed by the Riccati type equation with several nonlinear/nonlocal terms. Among these, the vorticity accelerates divergence while others further amplify the blow-up behaviour of a flow. The growth of these blow-up amplifying terms are related to the Riesz transform of density, which lacks a uniform bound makes it difficult to study global solutions of the multi-dimensional EP system. We show that the Riccati system can afford to have global solutions, as long as the growth rate of blow-up amplifying terms is not higher than exponential, and admits global smooth solutions for a large set of initial configurations. To show this, we construct an auxiliary system in 3D space and find an invariant space of the system, then comparison with the original 2D system is performed. Some numerical examples are also presented.
Ground state solutions for critical Schrödinger equations with Hardy potential
Authors: Li Gui-Dong , Li Yong-Yong , Tang Chun-Lei 
Published: September 2022

Abstract
In this paper, we investigate the following Schrödinger equation

0.1

−
Δ
u
−

μ

|
x

|

2

u
=
g

(

u

)

+
|
u

|

2

*

−
2

u

i
n

R

N

\

{

0

}

,

where N ⩾ 3,

μ
<

(

N
−
2

)

2

4

,

2

*

≔

2
N

N
−
2

is called the critical Sobolev exponent and g satisfies some appropriate subcritical conditions. For any

μ
∈

0
,

(

N
−
2

)

2

4

, we prove that problem (0.1) has a positive radial ground state solution, which possesses exponential decaying property at infinity and blow-up property at origin. Moreover, for any sequence {μ

n
} ⊂ (0, +∞) satisfying μ

n
→ 0+, the sequence of ground state solutions to problem (0.1) converges to a ground state solution of
0.2

−
Δ
u
=
g

(

u

)

+
|
u

|

2

*

−
2

u

i
n

R

N

.

when μ < 0, we prove that the mountain pass level of problem (0.1) in

H

1

(

R

N

)

cannot be achieved. Further, we obtain a ground state radial solution of problem (0.1) whose energy is strictly greater than the mountain pass level in

H

1

(

R

N

)

. Also, for any sequence {μ

n
} ⊂ (0, +∞) satisfying μ

n
→ 0+, the sequence of ground state radial solutions to problem (0.1) converges to a ground state radial solution of the limiting problem as n → ∞.
Noise induced order for skew-products over a non-uniformly expanding base
Authors: Blumenthal A , Nisoli I 
Published: September 2022

Abstract
Noise-induced order (NIO) is the phenomenon by which the chaotic regime of a deterministic system is destroyed in the presence of noise. In this manuscript, we establish NIO for a natural class of systems of dimension

⩾
2

consisting of a fiber-contracting skew product a over nonuniformly-expanding one-dimensional system.
High pointwise emergence and Katok’s conjecture for symbolic systems with non-uniform structure
Authors: Ji Yong , Chen Ercai , Lin Zijie 
Published: September 2022

Abstract
Recently, Kiriki, Nakano and Soma introduced a concept called pointwise emergence as a new quantitative perspective into the study of non-existence of averages for dynamical systems. In the present paper, we consider the set of points with high pointwise emergence for symbolic systems with non-uniform structure and prove that this set carries full topological pressure. For the proof of this result, we show that such systems have ergodic measures of arbitrary intermediate pressures.
Reducible Abelian varieties and Lax matrices for Euler’s problem of two fixed centres
Authors: Tsiganov A V 
Published: September 2022

Abstract
Abel’s quadratures for integrable Hamiltonian systems are defined up to a group law of the corresponding Abelian variety A. If A is isogenous to a direct product of Abelian varieties A ≅ A
1 ×⋯× A

k
, the group law can be used to construct various Lax matrices on the factors A
1, …, A

k
. As an example, we discuss two-dimensional reducible Abelian variety A = E
+ × E
−, which is a product of one-dimensional varieties E
± obtained by Euler in his study of the two fixed centres problem, and the Lax matrices on the factors E
±.
Critical curve for a two-species chemotaxis model with two chemicals in

R2

*
Authors: Hong Liang , Wang Jinhuan , Wang Wei 
Published: September 2022

Abstract
This paper deals with a two-species chemotaxis model with two chemicals in

R

2

. In our previous work (2019 Nonlinearity
32 4762–78), the critical mass was obtained that the solutions exist globally if m
1
m
2 − 4π(m
1 + m
2) < 0, and the finite time blow-up of solutions may occur if m
1
m
2 − 4π(m
1 + m
2) > 0, where m
1 and m
2 describe the initial mass of the two species, respectively. In the present paper we furthermore determine that the critical situation belongs to the global existence case, namely, the system admits global solutions if m
1
m
2 − 4π(m
1 + m
2) = 0. To apply the key logarithmic Hardy–Littlewood–Sobolev inequality of vector form for the critical case, we should establish a positive lower bound for L
1-norms of the two species in exterior domains

{

x
∈

R

2

:
|
x
|
>
R

}

uniformly for t > 0.
Parameter effects on arterial vessel sonicated by high-intensity focused ultrasound: an ex vivo vascular phantom study
Authors: Huang Qianwen , Zhou Yun , Li Ke , Pan Lei , Liu Yuan , Bai Jingfeng , Ji Xiang 
Published: September 2022

Abstract

Objective. This study is aimed to explore the effects of vascular and sonication parameters on ex vivo vessel sonicated by high-intensity focused ultrasound. Approach. The vascular phantom embedding the polyolefin tube or ex vivo vessel was sonicated. The vascular phantom with 1.6 and 3.2 mm tubes was sonicated at three acoustic powers (2.0, 3.5, 5.3 W). The occlusion level of post-sonication tubes was evaluated using ultrasound imaging. The vascular phantom with the ex vivo abdominal aorta of rabbit for three flow rates (0, 5, 10 cm s−1) was sonicated at two acoustic powers (3.5 and 5.3 W). Different distances between focus and posterior wall (2, 4, 6 mm) and cooling times (0 and 10 s) were also evaluated. The diameter of the sonicated vessel was measured by B-mode imaging and microscopic photography. Histological examination was performed for the sonicated vessels. Main results. For the 5 cm s−1 flow rate, the contraction index of vascular diameter (Dc) with 5.3 W and 10 s cooling time at 2 mm distance was 39 ± 9% (n = 9). With the same parameters except for 0 cm s−1 flow rate, the Dc was increased to 45 ± 7% (n = 4). At 3.5 W, the Dc with 5 cm s−1 flow rate was 23 ± 15% (n = 4). The distance and cooling time influenced the lesion along the vessel wall. Significance. This study has demonstrated the flow rate and acoustic power have the great impact on the vessel contraction. Besides, the larger lesion covering the vessel wall would promote the vessel contraction. And the in vivo validation is required in the future study.
Absorbed-dose-to-water measurement using alanine in ultra-high-pulse-dose-rate electron beams
Authors: Bourgouin Alexandra , Hackel Thomas , Marinelli Marco , Kranzer Rafael , Schüller Andreas , Kapsch Ralf-Peter 
Published: September 2022

Abstract

Objective. The aim of the presented study is to evaluate the dose response of the PTB’s secondary standard system, which is based on alanine and electron spin resonance (ESR) spectroscopy measurement, in ultra-high-pulse-dose-rate (UHPDR) electron beams. Approach. The alanine dosimeter system was evaluated in the PTB’s UHPDR electron beams (20 MeV) in a range of 0.15–6.2 Gy per pulse. The relationship between the obtained absorbed dose to water per pulse and the in-beamline charge measurement of the electron pulses acquired using an integrating current transformer (ICT) was evaluated. Monte Carlo simulations were used to determine the beam quality conversion and correction factors required to perform alanine dosimetry. Main results. The beam quality conversion factor from the reference quality 60Co to 20 MeV obtained by Monte Carlo simulation, 1.010(1), was found to be within the standard uncertainty of the consensus value, 1.014(5). The dose-to-water relative standard uncertainty was determined to be 0.68% in PTB’s UHPDR electron beams. Significance. In this investigation, the dose-response of the PTB’s alanine dosimeter system was evaluated in a range of dose per pulse between 0.15 Gy and 6.2 Gy and no evidence of dose-response dependency of the PTB’s secondary standard system based on alanine was observed. The alanine/ESR system was shown to be a precise dosimetry system for evaluating absorbed dose to water in UHPDR electron beams.
A C-arm photon counting CT prototype with volumetric coverage using multi-sweep step-and-shoot acquisitions
Authors: Treb Kevin , Ji Xu , Feng Mang , Zhang Ran , Periyasamy Sarvesh , Laeseke Paul F , Dingle Aaron M , Brace Christopher L , Li Ke 
Published: September 2022

Abstract

Objective. Existing clinical C-arm interventional systems use scintillator-based energy-integrating flat panel detectors (FPDs) to generate cone-beam CT (CBCT) images. Despite its volumetric coverage, FPD-CBCT does not provide sufficient low-contrast detectability desired for certain interventional procedures. The purpose of this work was to develop a C-arm photon counting detector (PCD) CT system with a step-and-shoot data acquisition method to further improve the tomographic imaging performance of interventional systems. Approach. As a proof-of-concept, a cadmium telluride-based 51 cm × 0.6 cm PCD was mounted in front of a FPD in an Artis Zee biplane system. A total of 10 C-arm sweeps (5 forward and 5 backward) were prescribed. A motorized patient table prototype was synchronized with the C-arm system such that it translates the object by a designated distance during the sub-second rest time in between gantry sweeps. To evaluate whether this multi-sweep step-and-shoot acquisition strategy can generate high-quality and volumetric PCD-CT images without geometric distortion artifacts, experiments were performed using physical phantoms, a human cadaver head, and an in vivo swine subject. Comparison with FPD-CT was made under matched narrow beam collimation and radiation dose conditions. Main results. Compared with FPD-CT images, PCD-CT images had lower noise and improved visualization of low-contrast lesion models, as well as improved visibility of small iodinated blood vessels. Fine structures were visualized more clearly by the PCD-CT than the highest-available resolution provided by FPD-CBCT and MDCT. No perceivable geometric distortion artifacts were observed in the multi-planar PCD-CT images. Significance. This work is the first demonstration of the feasibility of high-quality and multi-planar (volumetric) PCD-CT imaging with a rotating C-arm gantry.
Piecewise ensemble averaging stochastic Liouville equations for simulating non-Markovian quantum dynamics
Authors: Yan Yun-An , Zheng Xiao , Shao Jiushu 
Published: September 2022

Abstract
Here we present a novel stochastic Liouville equation with piecewisely correlated noises, in which the inter-piece correlation is rigorously incorporated by a convolution integral involving functional derivatives. Due to the feature of piecewise correlation, we can perform piecewise ensemble average and serve the average of the preceding interval as the initial condition of the subsequent propagation. This strategy avoids the long-time stochastic average and the statistical errors are saturated at long times. By doing so, we circumvent the intrinsic difficulty of the stochastic simulations caused by the fast increase in the variance of the quantum Brownian motion. Therefore, as demonstrated by the numerical examples, the proposed method enables us to simulate the long-time quantum dissipative dynamics with long memories in the non-perturbative regime.
Signatures of regular black holes from the shadow of Sgr A* and M87*
Authors: Banerjee Indrani , Sau Subhadip , SenGupta Soumitra 
Published: September 2022

Abstract
With the recent release of the black hole image of Sgr A* alongside the earlier image of M87*, one can now really hope to acquire a better understanding of the gravitational physics at the horizon scale. In this paper, we investigate the prospect of the regular black hole scenario with a Minkowski core in explaining the observed shadow of M87* and Sgr A*. Regular black holes generally appear in Einstein gravity coupled to non-linear electrodynamics and are interesting as they can evade the r = 0 curvature singularity arising in general relativity. Using the previously determined mass and distance we compute the observables associated with the black hole shadow. These when compared with the observed angular diameter reveals that the shadow of M87* and Sgr A* favor the regular black hole scenario with a small but non-zero charge. The implications are discussed.
BURSTT: Bustling Universe Radio Survey Telescope in Taiwan
Authors: Lin Hsiu-Hsien , Lin Kai-yang , Li Chao-Te , Tseng Yao-Huan , Jiang Homin , Wang Jen-Hung , Cheng Jen-Chieh , Pen Ue-Li , Chen Ming-Tang , Chen Pisin , Chen Yaocheng , Goto Tomotsugu , Hashimoto Tetsuya , Hwang Yuh-Jing , King Sun-Kun , Kubo Derek , Kuo Chung-Yun , Mills Adam , Nam Jiwoo , Oshiro Peter , Shen Chang-Shao , Tseng Hsien-Chun , Wang Shih-Hao , Wu Vigo Feng-Shun , Bower Geoffrey , Chang Shu-Hao , Chen Pai-An , Chen Ying-Chih , Chiang Yi-Kuan , Fedynitch Anatoli , Gusinskaia Nina , Ho Simon C.-C. , Hsiao Tiger Y.-Y. , Hu Chin-Ping , Huang Yau De , Jáuregui García José Miguel , Kim Seong Jin , Kuo Cheng-Yu , Ling Decmend Fang-Jie , On Alvina Y. L. , Peterson Jeffrey B. , R. Raquel Bjorn Jasper , Su Shih-Chieh , Uno Yuri , Wu Cossas K.-W. , Yamasaki Shotaro , Zhu Hong-Ming 
Published: September 2022

Abstract
Fast Radio Bursts (FRBs) are bright millisecond-duration radio transients that appear about 1000 times per day, all-sky, for a fluence threshold 5 Jy ms at 600 MHz. The FRB radio-emission physics and the compact objects involved in these events are subjects of intense and active debate. To better constrain source models, the Bustling Universe Radio Survey Telescope in Taiwan (BURSTT) is optimized to discover and localize a large sample of rare, high-fluence, and nearby FRBs. This population is the most amenable to multi-messenger and multi-wavelength follow-up, which allows a deeper understanding of source mechanisms. BURSTT will provide horizon-to-horizon sky coverage with a half power field-of-view (FoV) of ∼104 deg2, a 400 MHz effective bandwidth between 300 and 800 MHz, and subarcsecond localization, which is made possible using outrigger stations that are hundreds to thousands of km from the main array. Initially, BURSTT will employ 256 antennas. After tests of various antenna designs and optimizing the system’s performance, we plan to expand to 2048 antennas. We estimate that BURSTT-256 will detect and localize ∼100 bright (≥100 Jy ms) FRBs per year. Another advantage of BURSTT’s large FoV and continuous operation will be its greatly enhanced monitoring of FRBs for repetition. The current lack of sensitive all-sky observations likely means that many repeating FRBs are currently cataloged as single-event FRBs.
Experimental indications of non-classical brain functions
Authors: Kerskens Christian Matthias , López Pérez David 
Published: September 2022

Abstract
Recent proposals in quantum gravity have suggested that unknown systems can mediate entanglement between two known quantum systems, if the mediator itself is non-classical. This approach may be applicable to the brain, where speculations about quantum operations in consciousness and cognition have a long history. Proton spins of bulk water, which most likely interfere with any brain function, can act as the known quantum systems. If an unknown mediator exists, then NMR methods based on multiple quantum coherence (MQC) can act as an entanglement witness. However, there are doubts that today’s NMR signals can contain quantum correlations in general, and specifically in the brain environment. Here, we used a witness protocol based on zero quantum coherence (ZQC) where we minimized the classical signals to circumvent the NMR detection limits for quantum correlation. For short repetitive periods, we found evoked signals in most parts of the brain, whereby the temporal appearance resembled heartbeat-evoked potentials (HEPs). We found that those signals had no correlates with any classical NMR contrast. Similar to HEPs, the evoked signal depended on conscious awareness. Consciousness-related or electrophysiological signals are unknown in NMR. Remarkably, these signals only appeared if the local properties of the magnetization were reduced. Our findings suggest that we may have witnessed entanglement mediated by consciousness-related brain functions. Those brain functions must then operate non-classically, which would mean that consciousness is non-classical.
Social belonging: brain structure and function is linked to membership in sports teams, religious groups, and social clubs
Authors: Kieckhaefer Carolin , Schilbach Leonhard , Bzdok Danilo 
Published: September 2022

AbstractHuman behavior across the life span is driven by the psychological need to belong, right from kindergarten to bingo nights. Being part of social groups constitutes a backbone for communal life and confers many benefits for the physical and mental health. Capitalizing on the neuroimaging and behavioral data from ∼40,000 participants from the UK Biobank population cohort, we used structural and functional analyses to explore how social participation is reflected in the human brain. Across 3 different types of social groups, structural analyses point toward the variance in ventromedial prefrontal cortex, fusiform gyrus, and anterior cingulate cortex as structural substrates tightly linked to social participation. Functional connectivity analyses not only emphasized the importance of default mode and limbic network but also showed differences for sports teams and religious groups as compared to social clubs. Taken together, our findings establish the structural and functional integrity of the default mode network as a neural signature of social belonging.
Chemogenetic modulation of the medial prefrontal cortex regulates resistance to acute stress-induced cognitive impairments
Authors: Jeon Yong-Jae , Park Jung-Cheol , Jang Yoon-Sun , Kim Dong-Hee , Choi Bo-Ryoung , Kim Jae-Min , Kim Jeansok J , Han Jung-Soo 
Published: September 2022

AbstractThe medial prefrontal cortex (mPFC) has been implicated in regulating resistance to the effects of acute uncontrollable stress. We previously showed that mPFC-lesioned animals exhibit impaired object recognition memory after acute exposure to a brief stress that had no effect in normal animals. Here, we used designer receptors exclusively activated by designer drugs to determine how modulating mPFC activity affects recognition-memory performance under stressful conditions. Specifically, animals with chemogenetic excitation or inhibition of the mPFC underwent either a brief ineffective stress (20-min restraint + 20 tail shocks) or a prolonged effective stress (60-min restraint + 60 tail shocks). Subsequent recognition memory tests showed that animals with chemogenetic mPFC inhibition exposed to brief stress showed impairment in an object recognition memory task, whereas those with chemogenetic mPFC excitation exposed to prolonged stress did not. Thus, the present findings the decreased mPFC activity exacerbates acute stress effects on memory function whereas increased mPFC activity counters these stress effects provide evidence that the mPFC bidirectionally modulates stress resistance.
19. ERAS GUIDELINES-DRIVEN UPPER GASTROINTESTINAL CONTRAST STUDY AFTER ESOPHAGECTOMY CAN DETECT DELAYED GASTRIC CONDUIT EMPTYING AND IMPROVE OUTCOMES
Authors: Klevebro Fredrik , Konradsson Magnus , Han Shiwein , Luttikhold Joanna , Nilsson Magnus , Lindblad Mats , Andersson Mats , Low Donald E 
Published: September 2022

Abstract
Delayed gastric conduit emptying can occur after esophagectomy and has been shown to be associated with increased risk for postoperative complications. Application of a standardized clinical protocol after esophagectomy including an upper gastrointestinal contrast study has the potential to improve postoperative outcomes.
Prospective cohort including all patients operated with esophagectomy at two high-volume centers for esophageal surgery. The standardized clinical protocol included an upper gastrointestinal contrast study on day 2 or 3 after surgery. All images were compiled and evaluated for the purpose of the study. Clinical data was collected in IRB approved institutional databases at the participating centers. The study included 119 patients of whom 112 (94.1%) completed an upper gastrointestinal contrast study.
The results showed that 8 (7.1%) patients had no emptying of contrast from the gastric conduit, partial emptying was seen in in 34 (30.4%) patients, and 70 (62.5%) patients had complete conduit emptying. Complete or partial emptying was associated with significantly earlier nasogastric tube removal (3 vs. 6 days) and hospital discharge 8 vs. 17 days, P &lt; 0.001). Radiological signs of delayed gastric conduit emptying were shown to be associated with increased risk of postoperative complications. There was, however no association with severe postoperative complications according to Clavien-Dindo score, pulmonary complications, anastomotic leaks or need for intensive care.
The results of the study demonstrate that postoperative upper gastrointestinal contrast studies can be used to assess the level of emptying of the gastric conduit after esophagectomy. Application of upper gastrointestinal contrast study in the ERAS guidelines-driven standardized clinical pathway after esophagectomy can improve postoperative outcomes.