bluuebunny/crossref_metadata_2025_split huggingface dataset:
Tidal disruption event associated with the quasi-periodic eruptions from GSN 069: Possible disruption of a common envelope
Authors: Wang Di 
Published: February 2024

Context. X-ray quasi-periodic eruptions (QPEs) from the galactic nucleus have been found in several galaxies. Among them, GSN 069 is the only one with a tidal disruption event (TDE), which was recently found to have brightened again 9 years after the main outburst.
Aims. However, the origin of this TDE is still unclear. This Letter explores a particular model for the TDE.
Methods. By comparing the fallback time with observations, we found the TDE could not be caused by the disruption of the envelope of a single star in the tidal stripping model. Thus, we suggest that it is a disruption of a common envelope (CE).
Results. By calculating the fallback rate of such a model, we reproduced the second peak in the observed TDE light curve. If this model is correct, this TDE will be the closest observation to a direct observation of CE, which has never been directly observed.
Quasi-perpendicular shocks of galaxy clusters in hybrid kinetic simulations
Authors: Boula S. S. , Niemiec J. , Amano T. , Kobzar O. 
Published: February 2024

Context. Cosmic ray acceleration in galaxy clusters is still an ongoing puzzle, with relativistic electrons forming radio relics at merger shocks and emitting synchrotron radiation. These shocks are also potential sources of ultra-high-energy cosmic rays, gamma rays, and neutrinos. Our recent work focuses on electron acceleration at low Mach number merger shocks in the hot intracluster medium which is characterized by high plasma beta. Using particle-in-cell (PIC) simulations, we previously showed that electrons are energized through the stochastic shock-drift acceleration process, which is facilitated by multi-scale turbulence, including ion-scale shock surface rippling. For the present work, we performed hybrid-kinetic simulations in a range of various quasi-perpendicular foreshock conditions, including plasma beta, magnetic obliquity, and the shock Mach number.
Aims. We study the ion kinetic physics, which is responsible for the shock structure and wave turbulence, that in turn affects the particle acceleration processes. We cover the spatial and temporal scales, which allow the development of large-scale ion turbulence modes in the system.
Methods. We applied a recently developed generalized fluid-particle hybrid numerical code that can combine fluid modeling for both electrons and ions with an arbitrary number of kinetic species. We limited this model to a standard hybrid simulation configuration with kinetic ions and fluid electrons. The model utilizes the exact form of the generalized Ohm’s law, allowing for an arbitrary choice of mass and energy densities, as well as the charge-to-mass ratio of the kinetic species.
Results. We show that the properties of ion-driven multi-scale magnetic turbulence in merger shocks are in agreement with the ion structures observed in PIC simulations. In typical shocks with the sonic Mach number Ms = 3, the magnetic structures and shock front density ripples grow and saturate at wavelengths reaching approximately four ion Larmor radii. Only shocks with Ms ≳ 2.3 develop ripples. At very weak shocks with Ms ≲ 2.3, weak turbulence is formed downstream of the shock. We observed a moderate dependence of the strength of magnetic field fluctuations on the quasi-perpendicular magnetic field obliquity. However, as the field obliquity decreases, the shock front ripples exhibit longer wavelengths. Finally, we note that the steady-state structure of Ms = 3 shocks in high-beta plasmas shows evidence that there is little difference between 2D and 3D simulations. The turbulence near the shock front seems to be a 2D-like structure in 3D simulations.
Navigation in oral surgery: a systematic review
Authors: Oillic Alexis , Varazzani Andrea , Fitouchi Benjamin , Carlier Adelaide , Bouletreau Pierre 
Published: February 2024

Introduction: Dynamic navigation is a fast-growing technology in the field of head and neck surgery, which is now taking its place in oral surgery. The aim of this review was to present and describe all the uses of navigation in oral surgery. Materials and methods: A systematic review was conducted using all clinical trial/cases reports (Embase/PubMed) in which navigation is used during oral surgery, published over the last 5 yr. A total of 32 clinical trial/cases reports were analyzed. Results: Dynamic navigation was used in 7 different indications: implantology (55%), foreign body removal (15%), dental avulsion (12%), bone augmentation (9%), cellulitis (3%), benign tumour (3%), pre-prosthetic surgery (3%). A total of 335 patients were treated, 631 implants, 8 foreign bodies, 1 benign tumour, 24 dental avulsions, 3 bone augmentations, 1 cellulitis, and 1 pre-prosthetic surgery were found. In implantology, there were 500 standard implants, 75 zygomatic implants, 31 pterygoid implants, 1 short implant and 24 angulated implants. Conclusion: This review showed the recent development of dynamic navigation in oral surgery. The most common indication is dental implantology and few others indications seemed promising. This technique broadened its scope and might become an indispensable tool that can be used in many situations, increasing safety and predictability of a lot of procedure.
Posaconazole as single or adjunctive antifungal in mucormycosis of the maxilla: systematic review and meta-analysis
Authors: Pardiwala Arwa , Datarkar Abhay N. , Manekar Varsha , Daware Surendra 
Published: February 2024

Introduction: The aim of this systematic review was to analyse the benefits of utilizing posaconazole as a single drug therapy or in combination with other antifungals for the treatment of maxillary mucormycosis as opposed to sole use of amphotericin B. Materials and methods: Databases (MEDLINE via PubMed, Cochrane, EBSCO-host, Scopus, Science Direct, Clinical Trial Registry- India (CTRI) and Google scholar), review articles were searched from 1997 to 2022, using various MeSH terms.
Results: After application of the inclusion and exclusion criteria, four articles were finally selected. Three-month survival rate and duration of hospital stay were analysed as primary outcomes. There was no difference in survival among cases of maxillary mucormycosis treated with either drug alone. Death reported after treatment with combination treatment was less as compared to that with amphotericin B alone; however, there was non-significant difference in survival among cases treated with posaconazole in addition to amphotericin B or amphotericin B alone. Conclusion: Posaconazole can be used a single drug therapy for the treatment of maxillary mucormycosis due to its benefits outweighing its risks. The limitations of this study are the paucity of studies and Randomized Controlled Trials available in the literature in this field of study.
Product Selectivity Control under Acidic and Basic Conditions on Oxidative Transformation of 1,3-Dicarbonyls Using Sodium Hypochlorite Pentahydrate
Authors: Kirihara Masayuki , Takizawa Shinobu , Sakamoto Yugo , Tanaka Takumi , Kawai Takuma , Okada Tomohide , Kimura Yoshikazu 
Published: February 2024

AbstractIn this study, we reported that the reactivity of 1,3-dicarbonyls with sodium hypochlorite pentahydrate (NaOCl·5H2O) as an easy-to-handle oxidant, alters greatly depending on the pH value. The reaction of NaOCl·5H2O under weakly basic conditions (pH 12) gives the corresponding carboxylic acids in up to 97% yield. Upon addition of AcOH (pH 5), chlorination of active methylene sites proceeds efficiently to afford dichlorinated products in high yields.
Hypervalent Iodine Mediated Synthesis of Thiosulfonates from Sulfonyl Hydrazides and Their Transformation into Symmetrical Disulfides
Authors: Prasad Virendra , Yadav Ashvani , Kumar Rohit 
Published: February 2024

AbstractA transition-metal-free synthesis of thiosulfonates has been accomplished by the disproportionate coupling of readily available and inexpensive sulfonyl hydrazides embracing hypervalent iodine(III) [phenyliodine(III) diacetate (PIDA)] as an oxidant. This synthesis involves cleavage of the S–N bond and is endowed with creation of a new S–S bond. The thiosulfonates were further reduced with CS2/KOH to obtain symmetrical disulfides. This protocol features mild reaction conditions in open air, an inexpensive oxidant, and high functional group tolerance with good to excellent product yields.
Is Single LIMA-LAD Bypass Appropriate for OPCAB Training?
Authors: Naito Shiho , Reichenspurner Hermann , Sill Björn 
Published: February 2024

Abstract
Background A significant impact of surgeons' experience on outcomes of off-pump coronary artery bypass (OPCAB) has been recognized through previous large-scale studies. However, a safe, effective, and concrete OPCAB training was yet to be identified. We evaluate a safety of our OPCAB training model with single left internal mammary artery (LIMA)–left anterior descending artery (LAD) as a reasonable first step.
Methods Between January 2010 and June 2019, 180 patients with an isolated single coronary bypass of the LAD using LIMA as an in situ graft via median sternotomy fulfilled the inclusion criteria. Coronary arterial bypass under cardiopulmonary bypass (CPB), utilizing other graft material, minimal invasive direct coronary arterial bypass through left-sided thoracotomy, and multiple diseased coronary artery disease were excluded. The primary outcome is an early postoperative outcome (major adverse cardiac and cerebrovascular events [MACCEs]: myocardial infarction, coronary re-revascularization, stroke, acute renal failure, and all causes of death) between residents in training under supervision (group 1: n = 63) and experienced surgeons (group 2: n = 117). Trainees were already experienced in on-pump coronary artery bypass grafting.
Results Preoperative variables were comparable. There was no significant difference in the rate of MACCEs between the two groups including hospital mortality (p = 1.000), perioperative myocardial infarction (p = 0.246), stroke (p = 0.655), and acute renal failure (p = 0.175).
Conclusion The early postoperative outcome of off-pump LIMA to the LAD performed by trainees was comparable to those by experienced surgeons. Single LIMA-LAD was safely performed by trainees under supervision without CPB. In order to master OPCAB technique, single LAD bypass might be a reasonable first step to get into touch with the technical characteristics of this special procedure.
Generation of Alkylidene Carbenes through Tetrazole Fragmentation: Recent Advances and Applications in Organic Synthesis
Authors: Harusawa Shinya , Yoneyama Hiroki , Usami Yoshihide 
Published: February 2024

AbstractTetrazole fragmentation under mild conditions from 5-hydroxyalkyl-1H-tetrazoles (HATs) or cyanophosphates (CPs) readily generates the corresponding alkylidene carbenes, which undergo [1,2]-rearrangements or [1,5]-C–H insertions to yield one-carbon homologous alkynes or five-membered unsaturated carbocycles, respectively. Furthermore, azido-HATs and 2-cyanoazetidines afford propargylic and homopropargylic amines, respectively, via [1,2]-rearrangement of the corresponding aminoalkyl alkylidene carbenes. These reactions are successfully applied for the synthesis of various biofunctional molecules. This short review summarizes the progress made on this methodology over the last decade.1	Introduction2	Early Studies3	Tetrazole Fragmentation of HATs, Azido-HATs, and 2-Cyanoazetidines4	HAT Synthetic Methods5	Tetrazole Fragmentation from CPs6	Summary and Perspective
Increasing stability of a linearized inverse boundary value problem for a nonlinear Schrödinger equation on transversally anisotropic manifolds
Authors: Lu Shuai , Zhai Jian 
Published: February 2024

Abstract
We consider the problem of recovering a nonlinear potential function in a nonlinear Schrödinger equation on transversally anisotropic manifolds from the linearized Dirichlet-to-Neumann map at a large wavenumber. By calibrating the complex geometric optics solutions according to the wavenumber, we prove the increasing stability of recovering the coefficient of a cubic term as the wavenumber becomes large.
Performance analysis of carbon nanotube and graphene nanoribbon based biochemical sensors at atomic scale
Authors: Bhat Manasa , Ghosh Kaustab 
Published: February 2024

Abstract
Advancements in fabrication technologies have led to the possibility of synthesizing atomic-scale graphene nanoribbon (GNR) and carbon nanotube (CNT) based nanodevices. The purpose of this study was to model the electronic properties and electrical characteristics of these devices by atomistic modeling using density functional theory and the non-equilibrium Green’s function and compare the effects of molecular functionalization and sensing. The potential profile of the device was computed using the three-dimensional Poisson equation for smaller applied bias within one voltage range. Simulations showed a bandgap of 1 eV for armchair GNRs (AGNRs), which were insensitive to functionalized amine molecules, resulting in fewer alterations in the density of states (DoS), transmission spectra and the device current (ΔI). The bandgap further increased to 2 eV upon rolling the GNR into a armchair CNT (ACNT), which further decreased sensitivity. However, changing the configuration of the AGNR to a zigzag GNR (ZGNR) led to remarkable changes in the DoS and transmission spectra and a significant improvement in sensitivity. This improvement increased by 1.5–2 times upon rolling the ZGNR into a zigzag CNT (ZCNT). Thus, at lower dimensions in atomic scale, we found an alteration in device current of the carbon structures that was directly proportional to sensitivity in the following order: ΔI
ACNT < ΔI
AGNR < ΔI
ZGNR < ΔI
ZCNT. However, the same was found to fall for ZGNR and ZCNT with an increase in width to length (W/L) ratio. This highlights the importance of smaller atomic structures and this work provides a guideline for effective utilization of these structures for biochemical sensing.
Advances in complex oxide quantum materials through new approaches to molecular beam epitaxy
Authors: Rimal Gaurab , Comes Ryan B 
Published: February 2024

Abstract
Molecular beam epitaxy (MBE), a workhorse of the semiconductor industry, has progressed rapidly in the last few decades in the development of novel materials. Recent developments in condensed matter and materials physics have seen the rise of many novel quantum materials that require ultra-clean and high-quality samples for fundamental studies and applications. Novel oxide-based quantum materials synthesized using MBE have advanced the development of the field and materials. In this review, we discuss the recent progress in new MBE techniques that have enabled synthesis of complex oxides that exhibit ‘quantum’ phenomena, including superconductivity and topological electronic states. We show how these techniques have produced breakthroughs in the synthesis of 4d and 5d oxide films and heterostructures that are of particular interest as quantum materials. These new techniques in MBE offer a bright future for the synthesis of ultra-high quality oxide quantum materials.
Artificial neural network for deciphering the structural transformation of condensed ZnO by extended x-ray absorption fine structure spectroscopy
Authors: Liao Jiangwen , Pei Jiajing , Zhang Guikai , An Pengfei , Chu Shengqi , Ji Yuanyuan , Huang Huan , Zhang Jing , Dong Juncai 
Published: February 2024

Abstract
Pressure-induced structural phase transitions play a pivotal role in unlocking novel material functionalities and facilitating innovations in materials science. Nonetheless, unveiling the mechanisms of densification, which relies heavily on precise and comprehensive structural analysis, remains a challenge. Herein, we investigated the archetypal B4 → B1 phase transition pathway in ZnO by combining x-ray absorption fine structure (XAFS) spectroscopy with machine learning. Specifically, we developed an artificial neural network (NN) to decipher the extended-XAFS spectra by reconstructing the partial radial distribution functions of Zn–O/Zn pairs. This provided us with access to the evolution of the structural statistics for all the coordination shells in condensed ZnO, enabling us to accurately track the changes in the internal structural parameter u and the anharmonic effect. We observed a clear decrease in u and an increased anharmonicity near the onset of the B4 → B1 phase transition, indicating a preference for the iT phase as the intermediate state to initiate the phase transition that can arise from the softening of shear phonon modes. This study suggests that NN-based approach can facilitate a more comprehensive and efficient interpretation of XAFS under complex in-situ conditions, which paves the way for highly automated data processing pipelines for high-throughput and real-time characterizations in next-generation synchrotron photon sources.
Utilizing VQ-VAE for end-to-end health indicator generation in predicting rolling bearing RUL
Authors: Wang Junliang , Zhang Qinghua , Zhu Guanhua , Sun Guoxi 
Published: February 2024

Abstract
The prediction of the remaining useful life of rolling bearings is a pivotal issue in industrial production. A crucial approach to tackling this issue involves transforming vibration signals into health indicators (HI) to aid model training. This paper presents an end-to-end HI construction method, vector quantised variational autoencoder (VQ-VAE), which addresses the need for dimensionality reduction of latent variables in traditional unsupervised learning methods such as autoencoder. Moreover, concerning the inadequacy of traditional statistical metrics in reflecting curve fluctuations accurately, two novel statistical metrics, mean absolute distance (MAD) and mean variance (MV), are introduced. These metrics accurately depict the fluctuation patterns in the curves, thereby indicating the model’s accuracy in discerning similar features. On the PMH2012 dataset, methods employing VQ-VAE for label construction achieved lower values for MAD and MV. Furthermore, the ASTCN prediction model trained with VQ-VAE labels demonstrated commendable performance, attaining the lowest values for MAD and MV.
Investigation of combined rock-breaking ability of sawblade and conical pick
Authors: Wang Zhiwen , Zeng Qingliang , Wan Lirong , Lu Zhenguo , Liu Zhihai 
Published: February 2024

Abstract
To solve the problem of severe wear and low rock-breaking efficiency of a conical pick during rock cutting, a method of rock-breaking using a sawblade and conical pick is proposed, which can improve the rock-breaking ability and efficiency. Test benches for the sawblade rock cutting and conical-pick breaking were established to verify the numerical simulation model and improve the numerical simulation accuracy. The numerical simulation model of sawblade and conical-pick rock-cutting was used to investigate the effect of the cutting parameters on cutting performance. Based on the numerical simulation results of rock-breaking, a prediction model of the cutting force and specific cutting energy consumption for combined rock-breaking with a sawblade and conical pick was developed. This provides a comparative analysis basis for the combined rock-breaking capacity of sawblades and conical picks as well as traditional conical-pick rock-breaking. The results indicate that the cutting force, specific cutting energy consumption, and rock-breaking efficiency of combined rock-breaking with a sawblade and conical pick are better than those of the traditional conical pick. The research results provide a theoretical foundation for applying a combined rock-breaking method to sawblades and conical picks in engineering practice.
Rapid and large-scale synthesis of MoS2 via ultraviolet laser-assisted technology for photodetector applications
Authors: Xu Tingwei , Zeng Xiangbin , Hu Shijiao , Wang Wenzhao , Bao Xiaoqing , Peng Yu , Deng Huaicheng , Gan Zhuocheng , Wen Zhiqi , Zhang Wenhao , Chen Lihong 
Published: February 2024

Abstract
Two-dimensional transition metal dichalcogenide (TMDC) thin films have been extensively employed in microelectronics research. Molybdenum disulfide (MoS2), as one of prominent candidates of this class, has been applied in photodetectors, integrated electronic devices, gas sensing, and electrochemical catalysis, owing to its extraordinary optoelectronic, chemical, and mechanical properties. Synthesis of MoS2 crystal film is the key to its application. However, the reported technology revealed several drawbacks, containing limited surface area, prolonged high-temperature environment, and unsatisfying crystallinity. In order to enhance the convenience of MoS2 applications, there is a pressing need for optimized fabrication technology, which could be quicker, with a large area, with adequate crystallinity and heat-saving. In this work, we presented an ultraviolet laser-assisted synthesis technology, accomplishing rapid growth (with the growth rate of about 40 μm s−1) of centimeter-scale MoS2 films at room temperature. To achieve this, we self-assembled a displaceable reaction chamber system, coupled with krypton fluoride ultraviolet pulse laser. The laser motion speed and trajectory could be customized in the software, allowing the maskless patterning of crystal films. As application, we exhibited a photodetector with the integration of synthesized MoS2 and lead sulfide colloidal quantum dots (PbS CQDs), displaying broadband photodetection from ultraviolet, visible to near-infrared spectrum (365–1550 nm), with the detectivity of 109–1010 Jones, and the rising time of 0.2–0.3 s. This work not only demonstrated a high-process-efficiency synthesis of TMDC materials, but also has opened up new opportunities for ultraviolet laser used in optoelectronics.
Differential pressure sensors based on transfer-free piezoresistive layered PdSe2 thin films
Authors: Gong Yimin , Liu Liwen , Zhang Rui , Lin Jie , Yang Zhuojun , Wen Shaofeng , Yin Yi , Lan Changyong , Li Chun 
Published: February 2024

Abstract
Piezoresistive layered two-dimensional (2D) crystals offer intriguing promise as pressure sensors for microelectromechanical systems (MEMS) due to their remarkable strain-induced conductivity modulation. However, integration of the conventional chemical vapor deposition grown 2D thin films onto a micromachined silicon platform requires a complex transfer process, which degrades their strain-sensing performance. In this study, we present a differential pressure sensor built on a transfer-free piezoresistive PdSe2 polycrystalline film deposited on a SiN
x
membrane by plasma-enhanced selenization of a metal film at a temperature as low as 200 °C. Based on the resistance change and finite element strain analysis of the film under membrane deflection, we show that a 7.9 nm thick PdSe2 film has a gauge factor (GF) of −43.3, which is ten times larger than that of polycrystalline silicon. The large GF enables the development of a diaphragm pressure sensor with a high sensitivity of 3.9 × 10−4 kPa−1 within the differential pressure range of 0–60 kPa. In addition, the sensor with a Wheatstone bridge circuit achieves a high voltage sensitivity of 1.04 mV·kPa−1, a rapid response time of less than 97 ms, and small output voltage variation of 8.1 mV in the temperature range of 25 °C to 55 °C. This transfer-free and low-temperature grown PdSe2 piezoresistive thin film is promising for MEMS transducer devices.