bluuebunny/crossref_metadata_2025_split huggingface dataset:
Nasendoscopic Evaluation of the Velopharyngeal Sphincter in Cleft Palate Patinets
Authors: Deshpande S. N. 
Published: August 2023

SummaryNasendoscope was used for evaluation of the function of the velopharyngeal sphincter in twenty-five cleft palate patients using 4% xylocaine as surface anaesthesia. The pattern of closure and the residual defect in velopharyngeal sphincter during speech is helpful in deciding the treatment plan for velopharyngeal insufficiency such as speech therapy or pharyngoplasty.
Effects of simulated zero gravity on adhesion, cell structure, proliferation, and growth behavior, in glioblastoma multiforme
Authors: Altaie Saifaldeen , Alrawi Amera 
Published: August 2023

All life on Earth has evolved under the influence of continuous gravity, and methods have been developed to balance this influence with the biological evolution of organisms at the cellular and system levels. However, when exposed to zero gravity in space, the balance between cell structure and external forces is destroyed, resulting in changes at the cellular level (e.g., cell morphology, adhesion, viability, apoptosis, etc.), and understanding the molecular mechanism of cell response to zero gravity will help to cope with diseases that rely on mechanical response. Therefore, biological research in space and zero gravity is a unique step in developing the best anti-cancer treatments, which is a great challenge to humanity. In this study, multicellular glioma cancer cells from a brain tumor in a 72-year-old Iraqi patient were subjected to simulated zero gravity for 24 h, and the results showed that most of the cells lost their adhesion, which is considered to be the first step toward cell apoptosis. In addition to the formation of multicellular spheroids, the results also showed that the inhibition rate for cell death was 32% in comparison to the control cells. Moreover, the cells showed a clear change in their cellular morphology and growth behavior. These results give new hope for fighting cancer distinctively, and such a treatment method has no side effects in comparison to traditional chemical and radiological ones.
An 18.3 MJ charging and discharging pulsed power supply system for the space plasma environment research facility (SPERF): the subsystem for the magnetic mirror coil
Authors: E Peng , Guan Jian , Ma Xun , Ling Wenbin , Deng Weijun , Ding Mingjun , Kang Chuanhui , Zhao Juan , Li Hongtao , Tong Weiming , Li Liyi 
Published: August 2023

The magnetic reconnection process relevant to that at the magnetotail is one of the research contents of the Space Plasma Environment Research Facility, which is under construction at the Harbin Institute of Technology in China. Two magnetic mirror sub-coils placed symmetrically in the vertical direction and connected in series cooperate with a dipole coil to generate a magnetic field environment similar to the Earth’s magnetotail. A capacitor-based pulsed power supply (PPS) system with a modular design is developed to excite two magnetic mirror sub-coils to generate a magnetic field with a magnetic flux density of not less than 200 G at the center of the two sub-coils. The PPS should deliver a pulsed current with a peak of more than 8 kA, and the duration of the current not be less than 95% of the peak over 5 ms to two magnetic mirror sub-coils when the charging voltage is not less than 20 kV. In addition, the duration from the peak to 10% of the peak is not more than 130 ms. The detailed design of the PPS is discussed in this paper, and a test method is designed to reduce the risk of damage to the wires and the connection between the wires and the coaxial cables of the PPS when the PPS discharges at a higher charging voltage. Finally, the discharge test of the PPS is carried out to verify the design of the PPS.
A tunable clamshell cavity for wavelike dark matter searches
Authors: Braggio C. , Carugno G. , Di Vora R. , Ortolan A. , Ruoso G. , Seyler D. 
Published: August 2023

Here, we present a frequency tuning mechanism for microwave cavities designed for axion dark matter searches and show that it provides a range of at least 200 MHz for the fundamental mode TM010 resonant at ∼10 GHz. The apparatus is based on a clamshell cavity, with the two semi-cells held together at a fixed joint while the other side opens to tune the frequency of the resonant modes. Measurements of the cavity frequencies and quality factor were taken at liquid helium temperature as the aperture was increased incrementally to ∼2°. We show that the frequency shift is approximately linear with respect to the angle of aperture with no mode crossings present for an aperture less than 2°. Furthermore, the form factor and quality factor of the TM010 mode remain relatively constant throughout the tuning as predicted by simulation.
Evaluating an implementation of the Australian National Guidelines for the On-Screen Display of Discharge Summaries
Authors: Mahera Masarrat , Rodda Hamish , Monypenny Nick , Wembridge Paul 
Published: August 2023

Objective The objective of this study was to evaluate changes in the inclusion of pertinent information on electronic discharge summaries (eDS) after implementation of a revised template and electronic medical record (EMR) workflow. Methods A retrospective medical record audit of eDS at three metropolitan hospitals was undertaken for adult inpatient encounters in June 2021 (pre-intervention, n = 100) and June 2022 (post-intervention, n = 100). The eDS were evaluated against 16 components listed in the Australian National Guidelines for the On-Screen Display of Discharge Summaries. Nine components were further broken down to between two and 11 sub-components. Sub-analysis compared a hospital with full EMR to pooled results from hospitals with hybrid EMRs. Components and sub-components were evaluated for inclusion only; accuracy or relevance of the information was not assessed. Results Inclusion of three out of 16 components (presentation details: 47% vs 62%, problems and diagnosis: 61% vs 86% and recipient details: 82% vs 93%) and eight out of 36 sub-components (discharge destination, principal diagnosis, history of presenting complaint, infection risk, pressure injury, screening and/or diagnosis of delirium and GP phone number and address) was higher in the post-intervention group (all P < 0.05). Reduced eDS information inclusion in the post-intervention group was observed for discharge date and falls risk only (both P < 0.05). Reporting of falls history decreased at the hospital with full EMR (71% vs 20% P < 0.001) but not at hospitals utilising hybrid EMRs (24% vs 30% P = 0.5). Conclusion The intervention was associated with improved inclusion of pertinent information as described in the Australian National Guidelines for the On-Screen Display of Discharge Summaries.
All-optical birth time measurement of circularly polarized attosecond pulses
Authors: Zeng Qi , Deng Yimin , Cao Wei , Lu Peixiang 
Published: August 2023

Abstract
The advancement of attosecond science has made circularly polarized attosecond pulses increasingly essential. Despite ongoing research on their generation, few studies have explored methods of characterizing these pulses. To address this issue, we propose an all-optical technique for measuring the birth time of circularly polarized attosecond pulses generated by crossing two counter-rotating circularly polarized pulses in a noncollinear geometry. By introducing a weak second-harmonic to alter the phase of the electron trajectories, the even and odd high harmonics (HHs) are separated spatially, allowing one to determine the birth time of the attosecond pulses from the modulation of the even harmonics as a function of delay between the perturbing and driving fields. The spatial isolation of the even harmonic allows extending the method to the characterization of isolated attosecond pulse, which is challenging for existing in-situ methods. It provides deeper insight into the control and generation of circularly polarized HHs in both time and space domains, which will benefit circular dichroism attosecond metrology.
Modeling on magnetization behavior of ferromagnetic material during cyclic deformation
Authors: Bai Jiawei , Jin Ke , Kou Yong 
Published: August 2023

Abstract
In this paper, a nonlinear magneto-mechanical coupling constitutive model is established to describe the magnetization behavior of ferromagnetic materials under cyclic elastoplastic deformation. The critical state is introduced into the hysteretic magneto-mechanical model. In the critical state, the magnetization rates of loading and unloading are different. A new nonlinear plastic effective magnetic field is proposed by considering the effect of pinning sites caused by cross slip dislocation to describe the magnetization behavior under asymmetric cyclic loading. The softening factor and activation condition of plastic modulus parameter are introduced based on the cyclic plastic constitutive model to describe the decrease of plastic modulus. A new magnetization model for ferromagnetic materials under cyclic plastic deformation is established by combining the magneto-mechanical coupling model with the cyclic plastic constitutive model. Compared with the experiments and existing models, it is shown that the proposed model can capture the deformation and magnetization behavior well under cyclic loading.
Tunable valley splitting in two-dimensional CrBr3/VSe2 van der Waals heterostructure under strains and electric fields
Authors: Liang Xuesong , Sun Jin , Yu Zhizhou 
Published: August 2023

Abstract
Valleytronics opens up fascinating opportunities for using the valley degree of freedom in information storage and quantum computation. Here, based on the first-principles calculations, we investigate the effects of biaxial strains and electric fields on the magnetic, electronic, and valleytronic properties of two-dimensional CrBr3/VSe2 van der Waals (vdW) heterostructure consisting of two ferromagnetic monolayers. An interlayer magnetic phase transition from parallel to antiparallel is found when a compressive strain exceeds

−
2
%

or a tensile strain exceeds 4% is applied, while the interlayer magnetic configuration remains parallel under perpendicular electric fields. The valley splitting in the conduction bands is significantly enhanced by a compressive strain or an electric field pointing from the VSe2 to the CrBr3 layer. Specifically, a large valley splitting about 30.8 meV is obtained in the system with antiparallel interlayer magnetic configurations under a compressive strain of

−
4
%

, which is more than three times that of pristine CrBr3/VSe2 heterostructure. Our findings provide new insights into the future valleytronic applications for two-dimensional magnetic vdW heterostructures.
Robust monocular visual inertial odometry in γ radioactive environments using edge-based point features
Authors: Wang Hai , Zhang Hua , Deng Hao , Fu Meiqi 
Published: August 2023

Abstract
In the γ radioactive environment, high-energy photons induce degradation of the image sensor, which effects feature detection and tracking in the Visual Inertial Odometry (VIO) algorithm and deteriorates its localization performance. To address this issue, in this work, we propose a monocular VIO method using edge-based point features. To mitigate the effects of radiation noise, firstly, in the image preprocessing module, the median filter is used for real-time image denoising. Secondly, in the data association module, both Shi-Tomasi and edge-based point features are detected. The edge-based point feature is the endpoint or corner point in the salient edge map, which is more robust to radiation noise. Then, the bi-directional motion parallaxes and the RANdom SAmple Consensus (RANSAC) method are exploited to reject outliers. Finally, the point features measurements and Inertial Measurement Unit (IMU) pre-integration measurements are added into a tightly-coupled sliding window optimization VIO framework for localization estimation. The proposed method is verified by synthetic and real γ radioactive environment datasets. The experimental results show that the proposed method achieves more accurate and robust localization than the state-of-the-art VIO approaches in the γ radioactive environments.
Photon motion and weak gravitational lensing in black-bounce spacetime*
Authors: Sarikulov Furkat , Atamurotov Farruh , Abdujabbarov Ahmadjon , Khamidov Vokhid 
Published: August 2023

Abstract
The effect of spacetime curvature on photon motion may offer an opportunity to propose new tests on gravity theories. In this study, we investigate and focus on the massless (photon) particle motion around black-bounce gravity. We analyze the horizon structure around a gravitational compact object described by black-bounce spacetime. The photon motion and the effect of gravitational weak lensing in vacuum and plasma are discussed, and the shadow radius of the compact object is also studied in black-bounce spacetime. Additionally, the magnification of the image is studied using the deflection angle of light rays.
Narrowband EUV Sc/Si Multilayer for the Solar Upper Transition Region Imager at 46.5 nm
Authors: Qi Runze , Wu Jiali , Yu Jun , He Chunling , Jiang Li , Yu Yue , Zhang Zhe , Huang Qiushi , Zhang Zhong , Wang Zhanshan 
Published: August 2023

Abstract
The transition region is the key region between the lower solar atmosphere and the corona, which has been limitedly understood by human beings. Therefore, the Solar Upper Transition Region Imager (SUTRI) was proposed by Chinese scientists and launched in 2022 July. Right now, the first imaging observation of the upper transition region around 46.5 nm has been carried out by SUTRI. To ensure the spectral and temporal resolution of the SUTRI telescope, we have developed a narrowband Sc/Si multilayer. Based on the extreme ultraviolet (EUV) reflectivity measurements, the multilayer structure has been modified for ensuring the peak position of reflectivity was at 46.5 nm. Finally, the narrowband Sc/Si multilayer was successfully deposited on the hyperboloid primary mirror and secondary mirrors. The deviation of multilayer thickness uniformity was below than 1%, and the average EUV reflectivity at 46.1 nm was 27.8% with a near-normal incident angle of 5°. The calculated bandwidth of the reflectivity curve after primary and secondary mirrors was 2.82 nm, which could ensure the requirements of spectral resolution and reflectivity of SUTRI telescope to achieve its scientific goals.
3DT-CM: A Low-complexity Cross-matching Algorithm for Large Astronomical Catalogues Using 3d-tree Approach
Authors: Mu Yifei , Yu Ce , Sun Chao , Li Kun , Zhang Yajie , Wei Jizeng , Xiao Jian , Wang Jie 
Published: August 2023

Abstract
Location-based cross-matching is a preprocessing step in astronomy that aims to identify records belonging to the same celestial body based on the angular distance formula. The traditional approach involves comparing each record in one catalog with every record in the other catalog, resulting in a one-to-one comparison with high computational complexity. To reduce the computational time, index partitioning methods are used to divide the sky into regions and perform local cross-matching. In addition, cross-matching algorithms have been adopted on high-performance architectures to improve their efficiency. But the index partitioning methods and computation architectures only increase the degree of parallelism, and cannot decrease the complexity of pairwise-based cross-matching algorithm itself. A better algorithm is needed to further improve the performance of cross-matching algorithm. In this paper, we propose a 3d-tree-based cross-matching algorithm that converts the angular distance formula into an equivalent 3d Euclidean distance and uses 3d-tree method to reduce the overall computational complexity and to avoid boundary issues. Furthermore, we demonstrate the superiority of the 3d-tree approach over the 2d-tree method and implement it using a multi-threading technique during both the construction and querying phases. We have experimentally evaluated the proposed 3d-tree cross-matching algorithm using publicly available catalog data. The results show that our algorithm applied on two 32-core CPUs achieves equivalent performance than previous experiments conducted on a six-node CPU-GPU cluster.
Prediction for the Multi-band Afterglows of FRB 200428 and its Implication
Authors: Du Mei , Yi Shuang-Xi , Deng Can-Min , Wang Pei 
Published: August 2023

Abstract
The physical mechanism of fast radio bursts (FRBs) is still unknown. On 2020 April 28, a special radio burst, FRB 200428, was detected and believed to be associated with the Galactic magnetar SGR 1935+2154. It confirms that at least some of the FRBs were generated by magnetars, although the radiation mechanism continues to be debated. To this end, we study in detail the multiband afterglows of FRB 200428 described by the synchrotron fireball shock model. We find the prediction for the optical and radio afterglows of FRB 200428 is consistent with the observations when considering the post-FRB optical and radio upper limits from the literature. We also show that the follow up detection of the afterglows from fast radio bursts like—FRB 200428 is possible at the radio band, though challenging. Based on our model, one can obtain information about the energy of the fireball, the radiation zone, and the nature of the surrounding medium. That may shed light on the physical mechanism of FRBs.
Resonance in radio frequency sheath admittance and enhanced impurity emission near the ion cyclotron frequency
Authors: Rezazadeh Mikhail , Myra James R. , Curreli Davide 
Published: August 2023

Abstract
Ion cyclotron resonance heating (ICRH) is of considerable interest among all auxiliary heating techniques, because it transfers power directly to ions, targets the high-density core, and involves the cheapest radio-frequency (RF) components. During ICRH operation, RF sheaths form on the ICRH antenna itself, nearby hardware, and far-field surfaces. These sheaths are associated with large hot-spot formation and impurity emissions. This work presents high-resolution numerical modelling of RF sheaths in nuclear fusion scenarios using hPIC2, a Debye-scale particle-in-cell code. The modelling reveals a new RF sheath phenomenon which occurs when the RF is resonant with a species ion cyclotron frequency or harmonic in an oblique magnetic field. This resonance of the RF sheath causes modifications of the energy-angle distributions of the ions impacting on the walls, with consequent increase in wall impurity emission. Due to the

1

/

R

scaling of the magnetic field in a tokamak, such cases are possible on divertor or vacuum chamber surfaces, depending on the geometry of the tokamak and the RF heating scenario. A simple physics interpretation using a driven damped harmonic oscillator is proposed, where the ion sheath transit time plays the role of damping the RF sheath admittance. Critically, the resonance leads to increased ion heat flux at the wall as well as increased physical sputtering, despite a lack of increase in RF rectified sheath potential.
Systematic design of a multi-input multi-output controller by model-based decoupling: a demonstration on TCV using multi-species gas injection
Authors: Koenders J.T.W. , Perek A. , Galperti C. , Duval B.P. , Février O. , Theiler C. , van Berkel M. ,   the TCV Team
Published: August 2023

Abstract
In this paper, we present the first results of a systematically designed multi-input multi-output gas-injection controller on Tokamak á Configuration Variable (TCV). We demonstrate the simultaneous real-time control of the NII emission front position and line-integrated electron density using nitrogen and deuterium gas injection. Injection of nitrogen and/or deuterium affects both the NII emission front position and line-integrated electron density. This interplay between control loops is termed interaction and, when strongly present, makes designing a controller a significantly more complex problem. Interaction between the control loops can be reduced to an acceptable level by redefining inputs, decoupling the multi-input multi-output control problem to separated single-input single-output problems. We demonstrate how to achieve this by defining virtual control inputs from linear combinations of the actuators available. For the demonstration on TCV, linear combinations of deuterium and nitrogen gas injection are computed from transfer-function models to obtain these virtual inputs. The virtual inputs reduce the interaction in the control-relevant frequency range to a point where control of the NII emission front position and line-integrated electron density can be considered decoupled, allowing for the much simpler design of single-input single-output controllers for each loop. Implementing the controllers with the virtual inputs gives the multi-input multi-output gas-injection controller. This approach is well established in the control community, and is presented here as a demonstration to drive developments of multi-input multi-output control strategies. In particular, the envisioned control of particle- and heat fluxes impacting the divertor targets by injection of multiple gas species.
Using the Stix finite element RF code to investigate operation optimization of the ICRF antenna on Alcator C-Mod
Authors: Migliore C. , Wright J.C. , Stowell M. , Bonoli P.T. 
Published: August 2023

Abstract
As the Ion Cyclotron Radio Frequency range (ICRF) heating becomes more favorable in fusion devices, the urgency of predicting and mitigating impurity generation that arises from it becomes more pressing. In the ICRF regime, rectified Radio Frequency (RF) sheaths are known to form at antenna and material edges that influence negative effects like sputtering and a decrease in heating efficiency. Methods to mitigate the formation of these RF sheaths through RF image currents cancellation have been experimentally studied. A power-phasing scan done on Alcator C-Mod in which the amount of power on the two inner straps (P
in) versus the total 4 straps (P
tot) was varied showed a minimization of enhanced potentials between

P

in

/

P

tot

∼

0.7–0.9 while impurities were minimized for

P

in

/

P

tot

∼

0.5–0.8. New capabilities in the realm of representing the RF sheath numerically now allow for these experiments to be simulated. Given the size of the sheath relative to the scale of the device, it can be approximated as a Boundary Condition (BC). A new parallelized cold-plasma wave equation solver called Stix implements a non-linear sheath impedance model BC formulated by Myra et al (2015 Phys. Plasmas
22 062507) through the method of finite elements using the MFEM library [http://mfem.org]. It is seen that Stix shows qualitative agreement with the measured C-Mod enhanced potentials.