bluuebunny/crossref_metadata_2025_split huggingface dataset:
Chaotic-cavity surface-emitting lasers for optical wireless communication and low-speckle illumination
Authors: Alkhazragi Omar , Dong Ming , Chen Liang , Kong Meiwei , Melinte Georgian , Liang Dong , Ng Tien Khee , Zhang Junping , Bagci Hakan , Ooi Boon S. 
Published: August 2023

Though necessary and advantageous in many fields, the high coherence of lasers is detrimental to their performance in certain applications, including illumination, imaging, and projection. This is due to the formation of coherence artifacts, commonly known as speckles, resulting from the interference of randomly scattering spatially coherent photons. It is possible to resolve this issue by increasing the number of mutually incoherent modes emitted from the laser. In vertical-cavity surface-emitting lasers (VCSELs), this can be performed by designing them to have chaotic cavities. This paves the way toward their use in simultaneous illumination and communication scenarios. Herein, we show that chaotic-cavity broad-area VCSELs can achieve significantly broader modulation bandwidths (up to 5 GHz) and higher data rates (up to 12.6 GB/s) compared to other low-coherence light sources, with a lower speckle contrast. We further report a novel technique for lowering the speckle contrast by carefully designing the AC signal used for communication. We show that the apparent spatial coherence is dramatically decreased by inserting a short chirp signal between symbols. Using this method with a chaotic-cavity VCSEL, the number of apparent modes can be up to 450, compared to 88 modes measured from a conventional broad-area VCSEL (a fivefold increase). In light of the recent advances in visible-light VCSELs, this work shows the potential of low-coherence surface-emitting lasers (LCSELs) in simultaneous illumination and optical wireless communication systems since they combine the high speed of lasers with the excellent illumination properties of light-emitting diodes.
On the dynamics of a new memristive diode emulator-based Chua’s circuit
Authors: Kamdem Tchiedjo Servet , Djuidje Kenmoe Germaine , Kengne Jacques 
Published: August 2023

Abstract
The study of nonlinear systems has been the subject of numerous publications. When controlling the symmetry of chaotic oscillators, it has been observed that the symmetrical structure of the diode-bridge memristive emulators is continuously modified to break the symmetry of its current–voltage characteristic. This allows the nature of the symmetry of the oscillator in which they are incorporated to be influenced. In this paper, we present a simple memristive emulator based on simple electronic elements. This new emulator enables a simplified symmetry control method. By varying a control resistor, we modify the symmetry of the current–voltage characteristic of the memristor emulator and thus the symmetry of Chua oscillator in which it is incorporated as nonlinear component. Using dynamical systems analysis tools such as bifurcation diagrams and Lyapunov spectra, we describe how by simply varying a control parameter the symmetry is gradually broken. We highlight striking dynamic properties such as the coexistence of multiple symmetric and asymmetric oscillations and antimonotone bifurcations as well. Laboratory experimental studies are carried out to support the theoretically obtained results.
Inference and visualization of nuclear magnetic moment studies with neuro-fuzzy systems
Authors: Öztürk B , Kemah E , Yakut H , Tabar E , Hoşgör G 
Published: August 2023

Abstract
This study aims to predict the magnetic moments of nuclei with odd-A numbers in a certain region of which the magnetic moment has not yet been calculated, using the Adaptive Neuro-Fuzzy Inference System (Anfis) method. In our Anfis model the proton number (Z), neutron number (N), and spin value (I) are used as inputs for nuclei with 1 ≤ Z ≤ 88. With 652 nuclei in the dataset, consisting of the provided input data, 528 odd-A nuclei were used for training, and 124 odd-A nuclei were used for testing. The fact that the Anfis model was closer to the experimental data in the training and testing processes than the theoretical methods encouraged us to make inferences about the nuclei of which experimental nuclear magnetic moment is unknown. Motivated by the presence of odd-A nuclei exhibiting I
π
= 1/2±, 3/2±, and 5/2± ground-state configurations near the doubly closed-shell, within the 1 ≤ Z ≤ 28 regions, along with the limited knowledge of nuclear properties in this range. This study has conducted magnetic moment inferences for 165 nuclei lacking experimental data. Specifically, Na, F, and P isotopes have been chosen as Magnetic moment value inferences made for these isotopes using Anfis have also been compared with the theoretical results of the Quasiparticle-Phonon Nuclear Method (QPNM) and with the Shell Model calculations. There is a satisfactory agreement between our predictions and the results of these two theories. Furthermore, it is noteworthy that within the same isotope series, nuclei with identical ground-state configurations consistently yield compatible results, irrespective of the availability of experimental magnetic moments. In addition, the fact that the values obtained from test and train operations remain within acceptable error limits, with a range of approximately 0.03%–0.04%, reveals the reliability of our system. Since the Neuro-Fuzzy system will be a first in the field of nuclear technologies, we believe that the outputs of our study will be a good reference for future studies.
Dynamic hysteresis curves in a mixed spin ternary alloy system under the time-dependent magnetic field
Authors: Ertaş M , Batı M 
Published: August 2023

Abstract
The dynamic hysteresis features in mixed spins-

(
1
/
2
,
3
/
2
,
5
/
2
)

ternary alloy system with formula

A

B

p

C

(
1
−
p
)

was examined through Glauber-type stochastic dynamic and mean-field theory. The system includes two interpenetrating lattices, one has spin-

1
/
2

components, while the other includes a random distribution of spin-

3
/
2

and spin-

5
/
2

compounds. The effect of Hamiltonian parameters on the dynamic hysteresis behavior was investigated in detail and observed that the physical characteristics have a significant impact on the shape and quantity of hysteresis loops. We compared our findings with other theoretical and experimental investigations; a high level of agreement is obtained.
Dynamical symmetries of the anisotropic oscillator
Authors: Sinha Akash , Ghosh Aritra , Bagchi Bijan 
Published: August 2023

Abstract
It is well known that the Hamiltonian of an n-dimensional isotropic oscillator admits an SU(n) symmetry, making the system maximally superintegrable. However, the dynamical symmetries of the anisotropic oscillator are much more subtle. We introduce a novel set of canonical transformations that map an n-dimensional anisotropic oscillator to the corresponding isotropic problem. Consequently, the anisotropic oscillator is found to possess the same number of conserved quantities as the isotropic oscillator, making it maximally superintegrable too. The first integrals are explicitly calculated in the case of a two-dimensional anisotropic oscillator and remarkably, they admit closed-form expressions.
Antistars as possible sources of antihelium cosmic rays
Authors: Bykov A.M. , Postnov K.A. , Bondar A.E. , Blinnikov S.I. , Dolgov A.D. 
Published: August 2023

Abstract
A minor population of antistars in galaxies has been predicted by some of non-standard models of baryogenesis and
nucleosynthesis in the early Universe, and their presence is not yet excluded by the currently available observations. Detection of an unusually high abundance of antinuclei in cosmic rays can probe the baryogenesis scenarios in the early Universe.
Recent report of the AMS-02 collaboration on the tentative detection of a few antihelium nuclei in GeV cosmic rays provided a great hope on the progress in this issue. We discuss possible sources of antinuclei in cosmic rays from antistars which are predicted in a modified Affleck-Dine baryogenesis scenario by Dolgov and Silk (1993).
The model allows us to estimate the expected fluxes and isotopic content of
antinuclei in the GeV cosmic rays produced in scenarios involving antistars. We show that
the flux of antihelium CRs reported by the AMS-02 experiment can be explained by Galactic anti-nova outbursts, thermonuclear anti-SN Ia explosions, a collection of flaring antistars, or an extragalactic source with abundances not violating existing gamma-ray and microlensing constraints on the antistar population.
A Simulation of Calibration and Map-making Errors of the Tianlai Cylinder Pathfinder Array
Authors: Yu Kaifeng , Wu Fengquan , Zuo Shifan , Li Jixia , Sun Shijie , Wang Yougang , Chen Xuelei 
Published: August 2023

Abstract
The Tianlai cylinder array is a pathfinder for developing and testing 21 cm intensity mapping techniques. In this paper, we use numerical simulation to assess how its measurement is affected by thermal noise and the errors in calibration and map-making process, and the error in the sky map reconstructed from a drift scan survey. Here we consider only the single frequency, unpolarized case. The beam is modeled by fitting to the electromagnetic simulation of the antenna, and the variations of the complex gains of the array elements are modeled by Gaussian processes. Mock visibility data are generated and run through our data processing pipeline. We find that the accuracy of the current calibration is limited primarily by the absolute calibration, where the error comes mainly from the approximation of a single dominating point source. We then studied the m-mode map-making with the help of Moore–Penrose inverse. We find that discarding modes with singular values smaller than a threshold could generate visible artifacts in the map. The impacts of the residue variation of the complex gain and thermal noise are also investigated. The thermal noise in the map varies with latitude, being minimum at the latitude passing through the zenith of the telescope. The angular power spectrum of the reconstructed map show that the current Tianlai cylinder pathfinder, which has a shorter maximum baseline length in the North–South direction, can measure modes up to l ≲ 2π
b
NS/λ ∼ 200 very well, but would lose a significant fraction of higher angular modes when noise is present. These results help us to identify the main limiting factors in our current array configuration and data analysis procedure, and suggest that the performance can be improved by reconfiguration of the array feed positions.
Development of a complete simulation package for Self-Powered Neutron Detectors using the Monte Carlo Method and Geant4 toolkit
Authors: Li Kun , Li Gang , Wan Bo , Yang Daibo , Li Dan , Weng Xiaohui , Li Ang , Yin Qiusheng , Wang Haibo 
Published: August 2023

Abstract
In order to provide guidance on the design and use of the Self-Powered Neutron Detector (SPND) and improve measurement accuracy, accurate simulation of SPND is required. Therefore, a complete SPND simulation package was developed, including a particle transport calculation module, an electric field calculation module, a visualization interface and a data post-processing module. Due to electric field produced by space charge in the insulator, Geant4 has been chosen as the particle transport calculation module and an iterative code for the electric field was written to implement the calculation of the electric field in the insulator. To help researchers simplify the process of writing codes, a wizard-like visual interface was developed based on QT for configuring the input files and for performing the calculations. The accuracy of the simulation package was verified by comparing it with other calculation codes. With the help of the simulation package, the user can very easily achieve an accurate simulation of the SPND.
Climate change impact on photovoltaic power potential in South America
Authors: Narvaez Gabriel , Bressan Michael , Pantoja Andres , Giraldo Luis Felipe 
Published: August 2023

Abstract
This paper presents the first study of the long-term impact of climate change on photovoltaic potential in South America. This region has great potential for implementing renewable energy, mainly solar energy solutions, due to its high solar irradiance levels. Based on the Coordinated Regional Downscaling Experiment (CORDEX) for the South American region, we estimate how climate change could affect photovoltaic power potential by the end of the century. The evidence suggests that photovoltaic potential could have a maximum decrease of around 15%, and a maximum increase of approximately 7%, primarily due to changes in solar irradiance of different zones. Furthermore, it is observed that regions with increased temperature also show increased solar irradiance levels, which could, to some extent, compensate for the losses caused by the rise in temperature. Therefore, photovoltaic production in most of the territory will not be negatively affected.
Impact of fabrication methods on binder distribution and charge transport in composite cathodes of all-solid-state batteries
Authors: Emley Benjamin , Wu Chaoshan , Zhao Lihong , Ai Qing , Liang Yanliang , Chen Zhaoyang , Guo Liqun , Terlier Tanguy , Lou Jun , Fan Zheng , Yao Yan 
Published: August 2023

Abstract
The manufacturing process of all-solid-state batteries necessitates the use of polymer binders. However, these binders, being ionic insulators by nature, can adversely affect charge transport within composite cathodes, thereby impacting the rate performance of the batteries. In this work, we aim to investigate the impact of fabrication methods, specifically the solvent-free dry process versus the slurry-cast wet process, on binder distribution and charge transport in composite cathodes of solid-state batteries. In the dry process, the binder forms a fibrous network, while the wet process results in binder coverage on the surface of cathode active materials. The difference in microstructure leads to a notable 20-fold increase in ionic conductivity in the dry-processed cathode. Consequently, the cells processed via the dry method exhibit higher capacity retention of 89% and 83% at C/3 and C/2 rates, respectively, in comparison to 68% and 58% for the wet-processed cells at the same rate. These findings provide valuable insights into the influence of fabrication methods on binder distribution and charge transport, contributing to a better understanding of the binder’s role in manufacturing of all-solid-state batteries.
Protein–ligand binding affinity prediction exploiting sequence constituent homology
Authors: Abdel-Rehim Abbi , Orhobor Oghenejokpeme , Hang Lou , Ni Hao , King Ross D 
Published: August 2023

Abstract

Motivation
Molecular docking is a commonly used approach for estimating binding conformations and their resultant binding affinities. Machine learning has been successfully deployed to enhance such affinity estimations. Many methods of varying complexity have been developed making use of some or all the spatial and categorical information available in these structures. The evaluation of such methods has mainly been carried out using datasets from PDBbind. Particularly the Comparative Assessment of Scoring Functions (CASF) 2007, 2013, and 2016 datasets with dedicated test sets. This work demonstrates that only a small number of simple descriptors is necessary to efficiently estimate binding affinity for these complexes without the need to know the exact binding conformation of a ligand.

Results
The developed approach of using a small number of ligand and protein descriptors in conjunction with gradient boosting trees demonstrates high performance on the CASF datasets. This includes the commonly used benchmark CASF2016 where it appears to perform better than any other approach. This methodology is also useful for datasets where the spatial relationship between the ligand and protein is unknown as demonstrated using a large ChEMBL-derived dataset.

Availability and implementation
Code and data uploaded to https://github.com/abbiAR/PLBAffinity.
AKGF: Automatic Kernel Generation for DNN on CPU-FPGA
Authors: Dong Dong , Jiang Hongxu , Diao Boyu 
Published: August 2023

Abstract
While tensor accelerated compilers have proven effective in deploying deep neural networks (DNN) on general-purpose hardware, optimizing for FPGA remains challenging due to the complex DNN architectures and the heterogeneous, semi-open compute units. This paper introduces the Automatic Kernel Generation for DNN on CPU-FPGA (AKGF) framework for efficient deployment of DNN on heterogeneous CPU-FPGA platforms. AKGF generates an intermediate representation (IR) of the DNN using TVM’s Halide IR, annotates the operators of model layers in the IR to compute them on the corresponding hardware cores, and further optimizes the operator code for CPU and FPGA using ARM’s function library and the polyhedral model to enhance model inference speed and power consumption. The experimental tests conducted on a CPU-FPGA board validate the effectiveness of AKGF, demonstrating significant acceleration ratios (up to 6.7x) compared to state-of-the-art accelerators while achieving a 2x power optimization. AKGF effectively leverages the computational capabilities of both CPU and FPGA for high-performance deployment of DNN on CPU-FPGA platforms.
A case report of successful transaneurysmal repair of a giant isolated membranous ventricular septal aneurysm
Authors: Kumar Preetham , Varadarajan Padmini , Pai Ramdas G 
Published: August 2023

Abstract

Background
Isolated membranous ventricular septal aneurysms are infrequent in clinical practice. Furthermore, current guidelines do not dictate how to diagnose or manage such lesions.

Case summary
A 54-year-old male patient with a history of essential hypertension and tobacco use presented with chest pain associated with dyspnoea and nausea. Electrocardiogram was unrevealing. Physical exam was significant for a diastolic murmur heard best in the apex. Computed tomography angiography of the chest revealed an aneurysm measuring 5 cm in diameter along the ascending aorta. Transoesophageal echocardiography showed that the aneurysm originated from the membranous ventricular septum, coursed along the ascending aorta, and ended anteriorly to the surface of the right ventricle and ascending aorta. Cardiac magnetic resonance imaging confirmed these findings and demonstrated that the aneurysm comprised of two loculations. Given the size of the aneurysm and its proximal location to major cardiovascular structures, percutaneous repair was considered unsafe. Following a multidisciplinary meeting, the lesion was successfully resected via a transaneurysmal approach.

Discussion
Isolated membranous ventricular septal aneurysms are best imaged via a combination of transoesophageal echocardiogram and cardiac magnetic resonance imaging and best managed via a multidisciplinary approach for optimal outcomes.
Clinical outcomes in elderly atrial fibrillation patients at increased bleeding risk treated with very low dose vs. regular-dose non-vitamin K antagonist oral anticoagulants: a nationwide cohort study
Authors: Chan Yi-Hsin , Chao Tze-Fan , Chen Shao-Wei , Lee Hsin-Fu , Li Pei-Ru , Yeh Yung-Hsin , Kuo Chi-Tai , See Lai-Chu , Lip Gregory Y H 
Published: August 2023

Abstract

Aims
The Edoxaban Low-Dose for Elder Care Atrial Fibrillation Patients (ELDERCARE-AF) trial showed that edoxaban at a very low dosage (VLD) of 15 mg/day was more effective than a placebo at preventing stroke/systemic embolism without significantly increasing the risk of serious bleeding. We aimed to compare the effectiveness and safety for VLD non-vitamin K antagonist oral anticoagulants (NOACs) [edoxaban 15 mg o.d., dabigatran 110 or 150 o.d., apixaban 2.5 mg o.d., or rivaroxaban 10 mg (without the diagnosis of chronic kidney disease) or &lt;10 mg o.d.] vs. regular-dosage (RD) NOACs (edoxaban 60/30 mg o.d. or other labeling-dosage NOACs) among a real-world cohort of elderly atrial fibrillation (AF) population similar to the ELDERCARE-AF cohort.

Methods and results
In this nationwide retrospective cohort study from Taiwan National Health Insurance Research Database (NHIRD), we identified a total of 7294 and 4151 consecutive AF patients aged 80 years or older with a CHADS2 (congestive heart failure, hypertension, age 75 years or older, diabetes mellitus, previous stroke/transient ischemic attack (2 points) score ≥2 who met the enrollment criteria (generally similar to ELDERCARE-AF) taking VLD and RD NOACs from 1 June 2012 to 31 December 2019, respectively. Propensity-score stabilized weighting (PSSW) was used to balance covariates across study groups. Patients were followed up from the first date of prescription for NOACs until the first occurrence of any study outcome, death, or until the end date of the study period (31 December 2020). After PSSW, VLD NOAC was associated with a comparable risk of ischemic stroke/systemic embolism and major bleeding but a higher risk of major adverse limb events (MALEs) requiring lower limb revascularization or amputation [hazard ratio (HR): 1.54, 95% confidential interval (CI): 1.09–2.18; P = 0.014), venous thrombosis (HR: 3.75, 95% CI: 1.56–8.97; P = 0.003), and all-cause mortality (HR: 1.21, 95% CI: 1.15–1.29; P &lt;0.001) compared with RD NOACs. VLD NOACs showed worse outcomes in most net clinical outcome (NCO) benefits. The main result was consistent based on on-treatment analysis or accounting for death as a competing risk. In general, the advantage of NCOs for the RD NOACs over VLD NOACs persisted in most high-risk subgroups, consistent with the main analysis (P for interaction &gt; 0.05).

Conclusion
Use of VLD NOACs was associated with a greater risk of arterial and venous thrombosis, death as well as the composite outcomes, when compared with that of RD NOAC in high-risk elderly AF patients at increased bleeding risk. Thromboprophylaxis with RD NOAC is still preferable over VLD NOAC for the majority of elderly AF patients at increased bleeding risk.
Performance of the transoesophageal echocardiography probe as an oesophageal temperature monitor in patients undergoing cardiac surgery with cardiopulmonary bypass: a prospective observational study
Authors: Misra Satyajeet , Das Prasanta Kumar , Srinivasan Anand 
Published: August 2023

Abstract

OBJECTIVES
Core temperature monitoring is critical during cardiopulmonary bypass (CPB). In this prospective observational study, we investigated the performance of the transoesophageal echocardiography (TOE) probe for core (oesophageal) temperature monitoring during CPB.

METHODS
Thirty adult patients, 18–70 years of either gender, undergoing cardiac surgery with CPB were enrolled. All patients received a reusable nasopharyngeal probe for monitoring core temperatures. In addition, the oesophageal temperatures were monitored with the TOE probe. The arterial outlet temperatures at the membrane oxygenator were also monitored and taken as the reference standard. Monitoring was performed every 5 min until 20 min, and then at 30 min during both the cooling and rewarming periods.

RESULTS
During cooling, the oesophageal and nasopharyngeal temperatures lagged behind the arterial outlet temperatures. However, the intra-class correlation of the oesophageal temperatures with the arterial outlet temperatures was better (range 0.58–0.74) than the correlation of the nasopharyngeal temperatures with the arterial outlet temperatures (range 0.46–0.62). During rewarming, the performance of the TOE probe was significantly superior to the nasopharyngeal probe. After 15 and 20 min of rewarming, there was a difference of ∼1°C between the oesophageal and nasopharyngeal temperatures. At 30 min of rewarming, the oesophageal and the arterial outlet temperatures were similar, while the nasopharyngeal temperatures still lagged by 0.5°C. Bias was significantly less both during cooling and warming between the oesophageal temperatures and arterial outlet temperatures.

CONCLUSIONS
Performance of the TOE probe as an oesophageal temperature probe is superior to the nasopharyngeal probe during CPB.

Clinical trial registration number
CTRI no 2020/10/028228; ctri.nic.in.