bluuebunny/crossref_metadata_2025_split huggingface dataset:
Space-constrained optimized Tikhonov regularization method for 3D hemorrhage reconstruction by open magnetic induction tomography
Authors: Chen Yixuan , Dong Feng , Tan Chao 
Published: November 2022

Abstract

Objective. Open magnetic induction tomography (MIT) is a promising technique for detecting the intracranial hemorrhage due to the non-radioactive, non-invasive and portable features. However, severe inhomogeneity of the sensitivity distribution under the open MIT sensor array and the ill-conditioned nature of MIT inverse problem limit the imaging quality in hemorrhage reconstruction. More accurate and robust imaging algorithms are urgently needed in clinical diagnosis. Approach. In this study, the space-constrained optimized Tikhonov regularization (SOTR) method is proposed for 3D hemorrhage reconstruction by open MIT. The sensitivity matrix is optimized according to the characteristics of sensitivity distribution under the open MIT sensor array. To test the performance of the SOTR method, 3D anatomical head models with hemorrhages in different volumes and locations were established. The images of the hemorrhages were reconstructed by the Tikhonov regularization (TR), total variation (TV) regularization, isotropic SOTR, and anisotropic SOTR method. Correlation coefficient

C
C
,

localization error

L
E
,

and volume error

V
E

were calculated to evaluate the hemorrhage imaging quality. Main results. Compared with the traditional sensitivity matrix, the optimized sensitivity matrix has smaller column number and better uniformity, which alleviates the under-determined and ill-conditioned problem of MIT. The imaging results indicate that both the isotropic and anisotropic SOTR methods can effectively improve the reconstruction accuracy for the location and volume of the hemorrhages. Moreover, compared with the TR and TV methods, the two SOTR methods are more robust against the measurement noise. Significance. The proposed method improves the imaging quality of the intracranial hemorrhage, which promotes the clinical applications of open MIT.
Zinc-hyperdoped silicon photodetectors fabricated by femtosecond laser with sub-bandgap photoresponse
Authors: Fu Jiawei , Cong Jingkun , Cheng Li , Yang Deren , Yu Xuegong 
Published: November 2022

Abstract
Developing a low-cost, room-temperature operated and complementary metal-oxide-semiconductor (CMOS) compatible near infrared silicon photodetector is of interest for creating all-silicon optoelectronic integrated circuits. However, a silicon-based photodetector usually cannot respond to infrared light with wavelengths longer than 1100 nm, due to the bandgap (1.12 eV) limitation of silicon. Here, we present a zinc-hyperdoped silicon (Si:Zn)-based photodetector that exhibits an enhanced sub-bandgap photoresponse. The Si:Zn shows a broadband infrared absorption over 50%, with a zinc concentration reaches 4.66 × 1019 cm−3 near the surface. The responsivity of the Si:Zn photodetector reaches 0.68 mAW−1 at 1550 nm, −1 V bias, with a rise and fall time of 0.560 ms and 0.445 ms, respectively. The Si:Zn has the potential for a wide range of applications in various fields due to its combination of low cost, CMOS compatibility, and room-temperature operating conditions.
An impedance-based pole-zero method for estimating complex material parameters of piezoceramic plates
Authors: Cong Shuai , James Hu Sau-Lon , Li Hua-Jun 
Published: November 2022

Abstract
Precisely determining complex-valued elastic, piezoelectric, and dielectric parameters of piezoceramic plates has been a challenging problem. Given measured impedance functions (MIFs), this study develops a pole-zero finite element model updating (FEMU) method for determining sensitive complex material parameters (CMPs) associated with k
31-mode and k
33-mode piezoceramic plates. The proposed method includes two novel aspects: (a) extracting complex-valued poles and zeros, which are related to the eigenvalues of short- and open-circuit FE models, respectively, from MIFs, and (b) developing a sensitivity-based FEMU method to update the CMPs based on the measured poles and zeros. In the numerical studies, both computer simulations and lab experiments are carried out to demonstrate the excellent performance of the developed method.
White-noise fluctuation theorem for Langevin dynamics
Authors: Innerbichler M , Militaru A , Frimmer M , Novotny L , Dellago C 
Published: November 2022

Abstract
Fluctuation theorems (FTs) based on time-reversal have provided remarkable insight into the non-equilibrium statistics of thermodynamic quantities like heat, work, and entropy production. These types of laws impose constraints on the distributions of certain trajectory functionals that reflect underlying dynamical symmetries. In this work, we introduce a detailed FT for Langevin dynamics that follows from the statistics of Gaussian white noise rather than from time-reversal. The theorem, which originates from a point-wise symmetry in phase space, holds individually for each degree of freedom coupled to additive or multiplicative noise. The relation is independent of the phase space distribution generated by the dynamics and can be used to derive a versatile parameter inference algorithm applicable to the a wide range of systems, including non-conservative and non-Markovian ones.
Strain-driven tunability of the optical, electronic, and mechanical properties of lead-free inorganic CsGeCl3 perovskites
Authors: Islam Md. Rasidul , Mojumder Md. Rayid Hasan , Islam A S M Jannatul , Alom Md. Zahangir 
Published: November 2022

Abstract
Lead-free inorganic metal halide perovskites CsGeCl3 have recently gained prominent research interest in solar technology due to their outstanding optoelectronic properties and mechanical stability. Here, the density functional theory is considered to investigate the biaxial strain-driven (from −6% to +6%) structural configuration, mechanical stability, and optoelectronic properties of non-toxic CsGeCl3 metal halide. Optical properties such as absorption coefficient, dielectric functions, and electron loss function show that due to the biaxial strain (compressive and tensile), this material has a high absorption capacity of photons in the visible and ultraviolet regions, and that’s why it is very much suitable to apply in the solar cells and other optoelectronic energy devices. The electronic band structure shows that CsGeCl3 is a semiconductor material with a direct bandgap of 0.768 eV at the R-point. Moreover, we observed a semiconductor-to-metallic transition of the bandgap of CsGeCl3 in the presence of the compressive strain. The findings of the mechanical properties of the CsGeCl3 perovskites demonstrate that Ge could be a suitable replacement for Pb in the traditional Pb-based perovskite structures. Especially in the strain portion of −2% to +2%, the investigated metal halide perovskite structure, Pb being replaced by Ge, shows mechanical ductility, absorption of visible and UV radiation, prominent absorption peaks, tunable bandgap value of 0.123 to 0.896 eV and thus, is very much suitable to be considered for solar photovoltaic applications.
Dynamical analysis and microcontroller implementation of fractal resistive-capacitive shunted Josephson junction
Authors: Ngongiah Isidore Komofor , Ramakrishnan Balamurali , Njitacke Zeric Tabekoueng , Kuiate Gaetan Fautso , Kingni Sifeu Takougang 
Published: November 2022

AbstractThe resistive-capacitive shunted Josephson junction (JJ) with fractal propertiesis scrutinized in this paper. The rate equations betelling the fractal resistive-capacitive shunted Josephson junction (FRCSJJ) are established and have for the external biasing direct current (DC) source less than or equal to 1 two equilibrium points and no equilibrium point for the external biasing DC source greater than 1. Stability characterization by the Routh-Hurwitz critic indicates one stable equilibrium point called the ‘stable node’ and the other unstable referred to as the ‘saddle-node’. Current-voltage (C-V) characteristics depict the sensitivity of the hysteresis loop to the two fractal parameters. With an external alternative current (AC) source used in biasing FRCSJJ, the model exhibits periodic bursting oscillations, periodic oscillations, reverse period-doubling route to chaotic oscillations, periodic and chaotic bubbles, antimonotonicity, different shapes of chaotic dynamics, and mutual interaction between complex oscillations and period-4-oscillations. Finally, the accomplishment of the microcontroller implementation of FRCSJJ establishes the quantitative agreement with numerically obtained dynamics.
Comparative performance of various susceptor materials and vertical cavity shapes for selective microwave hybrid heating (SMHH)
Authors: Rawat Saurabh , Samyal Rahul , Bedi Raman , Bagha Ashok kumar 
Published: November 2022

Abstract
The microwave processing of materials is gaining popularity over the past decade due to its unique heating abilities. The microwave hybrid heating (MHH) technique has effectively processed bulk metallic materials. MHH is assisted by susceptor material which forces metals to absorb microwave radiations. Further, MHH is modified to selective microwave hybrid heating (SMHH) to increase the efficiency of the process. This work examines the performance of Graphite and Charcoal susceptors with a conical vertical cavity for SMHH using FEM simulation. It is observed that the maximum temperature achieved by Graphite was 215 °C at an exposure time of 300 s, whereas, for Charcoal susceptor, it is 655 °C. Further, the effect of different vertical cavity shapes (cylindrical and conical) on the SMHH technique is presented for Charcoal susceptor. For an exposure time of 300 s, the temperature rise in the conical and cylindrical cavity is 655 °C and 319 °C, respectively. From resistive heat flow, time-temperature profile and temperature distribution, it is clear how SMHH is significantly effective for a conical vertical cavity having Charcoal susceptor. In addition, the performance of the conical vertical cavity having Charcoal susceptor was validated through experimental study. The real-time temperature profile was determined through testo 885/testo 890 thermal imaging camera. The observed maximum temperature of the susceptor after heating for 300 s was 639.9 °C.
Time-dependent finite-difference model for transient and steady-state analysis of thermoelectric bulk materials
Authors: Rathnayake R A , Wijekoon H , Pemasiri B M K , Subasinghe N D 
Published: November 2022

Abstract
A mathematical model of coupled thermoelectricity is presented to investigate the transient and steady-state behaviour of thermoelectric bulk material. Governing partial differential equations (PDEs) for the coupled thermal and electrical behaviour of the thermoelectric model are discretised using the explicit finite-difference method. Differencing schemes like Upwind and Lax–Wendroff methods are employed to obtain solutions for the first-order hyperbolic PDEs, whereas FTCS (Forward Time, Centred Space) scheme is employed to solve second-order parabolic PDEs. Courant-Friedrichs-Lewy and Von Neumann stability analyses are done to ensure the stability and convergence of the model. The model considers the temperature dependency of thermal conductivity, electrical conductivity, and Seebeck coefficient of the P/N materials separately. and accounts for the Seebeck, Peltier, and Joule-Thomson effects in thermoelectric materials. The new model is practically useful to predict the transient and steady-state behaviours of a thermoelectric device with multiple P-N elements. The results of the presented finite-difference model are proven to agree well with experimental values as well as 3D simulations with ANSYS®.
Newtonian approximation in (1 + 1) dimensions
Authors: Casadio Roberto , Micu Octavian , Mureika Jonas 
Published: November 2022

Abstract
We study the possible existence of a Newtonian regime of gravity in 1 + 1 dimensions, considering metrics in both the Kerr-Schild and conformal forms In the former case, the metric gives the exact solution of the Poisson equation in flat space, but the weak-field limit of the solutions and the non-relativistic regime of geodesic motion are not trivial. We show that using harmonic coordinates, the metric is conformally flat and a weak-field expansion is straightforward. An analysis of the non-relativistic regime of geodesic motion remains non-trivial and the weak-field potential only satisfies the flat space Poisson equation approximately.
Role of a high ground-state centrifugal barrier in the breakup of the 31Ne nucleus
Authors: Mukeru B. 
Published: November 2022

Abstract
An analysis of the breakup of the

weakly-bound neutron-halo system on a lead target is presented, considering the

and

ground-state configurations. It is shown that a high centrifugal barrier almost wipes out the breakup channel, thus assimilating the breakup of a weakly-bound system to that of a tightly-bound system, and also reduces the range of the monopole nuclear potential. Consequently, a high centrifugal barrier prevents the suppression of the Coulomb-nuclear interference (CNI) peak by weakening couplings to the breakup channel and reducing the range of the monopole nuclear potential, two main factors that would otherwise suppress such a peak. The present study also identifies couplings to the breakup channel and a long-ranged monopole nuclear potential as the main factors that lead to the suppression of the CNI peak. A low centrifugal barrier together with a Coulomb barrier would also effectively prevent the suppression of the CNI peak in proton-halos as reported in the case of the

proton-halo.
WITHDRAWN: Proposal for a nuclear light source
Authors: Tkalya E. V. , Borisyuk P. V. , Domashenko M. S. , Lebedinskii Yu. Yu. 
Published: November 2022

Notice of Withdrawal
This paper was withdrawn by IOP Publishing on 25/01/2023. This paper was published due to a technical error and should not have been published by this journal. The authors are free to publish this work elsewhere. IOP Publishing apologise for this error.
Machine Learning to Search for Accreting Neutron Star Binary Candidates Using Chinese Space Station Telescope Photometric System
Authors: Lan Shun-Yi , Ji Kai-Fan , Meng Xiang-Cun 
Published: November 2022

Abstract
Accreting neutron star binary (ANSB) systems can provide some important information about neutron stars (NSs), especially on the structure and the equation of state of NSs. However, only a few ANSBs are known so far. The upcoming Chinese Space Station Telescope (CSST) provides an opportunity to search for a large number of ANSB candidates. We aim to investigate whether or not a machine learning method may efficiently search for ANSBs based on CSST photometric system. In this paper, we generate some ANSBs and normal binaries under CSST photometric system by binary evolution and binary population synthesis method and use a machine learning method to train a classification model. We consider the classical multi-color disk and the irradiated accretion disk, then compare their effects on the classification results. We find that no matter whether the X-ray reprocessing effect is included or not, the machine learning classification accuracy is always very high, i.e., higher than 96%. If a significant magnitude difference exists between the accretion disk and the companion of an ANSB, machine learning may not distinguish it from some normal stars such as massive main sequence stars, white dwarf binaries, etc. False classifications of the ANSBs and the normal stars highly overlap in a color–color diagram. Our results indicate that machine learning would be a powerful way to search for potential ANSB candidates from the CSST survey.
Transgenic Schwann cells overexpressing POU6F1 promote sciatic nerve regeneration within acellular nerve allografts
Authors: Li Wen-Yuan , Li Zhi-Gang , Fu Xiu-Mei , Wang Xiao-yu , Lv Zhong-xiao , Sun Ping , Zhu Xiao-Feng , Wang Ying 
Published: November 2022

Abstract

Objective. Acellular nerve allograft (ANA) is an effective surgical approach used to bridge the sciatic nerve gap. The molecular regulators of post-surgical recovery are not well-known. Here, we explored the effect of transgenic Schwann cells (SCs) overexpressing POU domain class 6, transcription factor 1 (POU6F1) on sciatic nerve regeneration within ANAs. We explored the functions of POU6F1 in nerve regeneration by using a cell model of H2O2-induced SCs injury and transplanting SCs overexpressing POU6F1 into ANA to repair sciatic nerve gaps. Approach. Using RNA-seq, Protein–Protein Interaction network analysis, gene ontology enrichment, and Kyoto Encyclopedia of Genes and Genomes pathway analysis, we identified a highly and differentially expressed transcription factor, POU6F1, following ANA treatment of sciatic nerve gap. Expressing a high degree of connectivity, POU6F1 was predicted to play a role in peripheral nervous system myelination. Main results. To test the role of POU6F1 in nerve regeneration after ANA, we infected SCs with adeno-associated virus—POU6F1, demonstrating that POU6F1 overexpression promotes proliferation, anti-apoptosis, and migration of SCs in vitro. We also found that POU6F1 significantly upregulated JNK1/2 and c-Jun phosphorylation and that selective JNK1/2 inhibition attenuated the effects of POU6F1 on proliferation, survival, migration, and JNK1/2 and c-Jun phosphorylation. The direct interaction of POU6F1 and activated JNK1/2 was subsequently confirmed by co-immunoprecipitation. In rat sciatic nerve injury model with a 10 mm gap, we confirmed the pattern of POU6F1 upregulation and co-localization with transplanted SCs. ANAs loaded with POU6F1-overexpressing SCs demonstrated the enhanced survival of transplanted SCs, axonal regeneration, myelination, and functional motor recovery compared to the ANA group loaded by SCs-only in line with in vitro findings. Significance. This study identifies POU6F1 as a novel regulator of post-injury sciatic nerve repair, acting through JNK/c-Jun signaling in SCs to optimize therapeutic outcomes in the ANA surgical approach.
Neuromodulation of brain power topography and network topology by prefrontal transcranial photobiomodulation
Authors: Shahdadian Sadra , Wang Xinlong , Wanniarachchi Hashini , Chaudhari Akhil , Truong Nghi Cong Dung , Liu Hanli 
Published: November 2022

Abstract

Objective. Transcranial photobiomodulation (tPBM) has shown promising benefits, including cognitive improvement, in healthy humans and in patients with Alzheimer’s disease. In this study, we aimed to identify key cortical regions that present significant changes caused by tPBM in the electroencephalogram (EEG) oscillation powers and functional connectivity in the healthy human brain. Approach. A 64-channel EEG was recorded from 45 healthy participants during a 13 min period consisting of a 2 min baseline, 8 min tPBM/sham intervention, and 3 min recovery. After pre-processing and normalizing the EEG data at the five EEG rhythms, cluster-based permutation tests were performed for multiple comparisons of spectral power topographies, followed by graph-theory analysis as a topological approach for quantification of brain connectivity metrics at global and nodal/cluster levels. Main results. EEG power enhancement was observed in clusters of channels over the frontoparietal regions in the alpha band and the centroparietal regions in the beta band. The global measures of the network revealed a reduction in synchronization, global efficiency, and small-worldness of beta band connectivity, implying an enhancement of brain network complexity. In addition, in the beta band, nodal graphical analysis demonstrated significant increases in local information integration and centrality over the frontal clusters, accompanied by a decrease in segregation over the bilateral frontal, left parietal, and left occipital regions. Significance. Frontal tPBM increased EEG alpha and beta powers in the frontal-central-parietal regions, enhanced the complexity of the global beta-wave brain network, and augmented local information flow and integration of beta oscillations across prefrontal cortical regions. This study sheds light on the potential link between electrophysiological effects and human cognitive improvement induced by tPBM.
A steady state vs pulsed fusion neutron science facility
Authors: Guazzotto L. , Freidberg J.P. 
Published: November 2022

Abstract
Two major modifications to the existing steady state fusion neutron science facility (FNSF) concept (Kessel et al 2018 Fusion Eng. Des. 135 236–70) are investigated with the aim of determining whether or not its predicted performance can be improved. The modifications are high magnetic field and pulsed operation. We find that high field leads to major economic improvements in a steady state FNSF, although at the expense of lowering the engineering gain. Pulsed operation replaces the problems associated with low current drive efficiency, with hopefully more manageable engineering problems. Here, however, high toroidal field (TF) is not helpful, and a lower TF field is more desirable economically. Pulsed FNSFs also have a reduced engineering gain. Further modifications lead to FNSF designs satisfying the additional constraint of engineering gain equal to unity. For these designs there is a large cost penalty for the steady state FNSF but only a modest penalty for the pulsed FNSF. All of our modified designs show modest to large potential economic improvements over the existing design. Overall, our conclusion is that it may be desirable to carry out a more detailed analysis of one of our improved designs, the choice depending upon which issue in the existing design is most important.
Observational Analysis of Stationary C.I. Engine Output and Emission Evaluation for Variance of Induction Pressure Aspects
Authors: Talele Dipak C , Deshmukh Dheeraj S , Deshmukh Manish S , Deshmukh Sheetal D , Patil Vilas S 
Published: November 2022

Abstract
In the current environment, improved engine performance, reduced fuel consumption and reduced emissions are important goals for automotive manufacturers. To understand the factors involved in the compartment assemblies in Compression Ignition (C I) engines it is crucial to concentrate on such goals. Pressure rating, fuel atomization, fuel pressure, fuel quality, air pressure rating, air temperature, pressure and other design components such as piston, Air induction system, and assembly chamber and more to work. It is evident from the literature review and research work carried out to date that the airing system is best method of promoting C I operation of the engine. The design of the Air suction system could be achieved in this way that it takes into account the objectives of entire system. Effective air suction system improvement needs least energy utilization and most extreme use of air intake pressure for decrease in poisonous productions at outlet of C I engines. Furthermore, powerful use of fuel vitality. In present work, air suction arrangement, exclusively less air inlet pressure during suction stroke of four stroke cycle engine concern is topic of explicit enthusiasm for plan. Advancement of air induction system with air induction pressure regulator, flow distribution, action is studied and useful information is developed through proper intake manifold arrangement for better fuel efficiency.