bluuebunny/crossref_metadata_2025_split huggingface dataset:
Unnoticed Adverse Effect of Isoniazid during Childhood Tuberculosis Preventive Treatment: Hyperuricemia
Authors: Kandemir Bahar , Duman Ipek , Durduran Yasemin , Metin Akcan Ozge , Selver Muhammed Burak , Pekcan Sevgi 
Published: March 2021

Abstract
Objective Isoniazid for 6 to 9 months is the most widely used form of tuberculosis (TB) preventive treatment. We aimed to assess the adverse effects of isoniazid by using the serum levels of aspartate transaminase (AST), alanine transaminase (ALT), and uric acid (SUA) in children and adolescents receiving long-term isoniazid for latent TB infection.
Methods The study included children ≤18 years of age who underwent TB preventive treatment with isoniazid (IPT) between 2015 and 2019 at a university hospital. Serum transaminase, SUA, urea, and creatinine levels of patients were measured before the initiation of IPT, 15th day, and once a month during treatment. Patients with ALT, AST, or SUA results above cut-off levels during treatment were evaluated. The final values in follow-up were included in the data analysis.
Results A total of 141 children who underwent IPT were included. In total, 70 children had family members with confirmed TB disease, and 71 children had a positive tuberculin skin test. SUA increased above cut-off values in 16 children (11.3%), and half of them had uric acid levels over 7 mg/dL. The median duration of the development of hyperuricemia was 4.0 months. ALT or AST increased above cut-off values in 23 children (16.3%). ALT was above cut-off values in seven patients, AST was high in 20 patients. The median duration to the development of AST and/or ALT levels above cut-off was 4.0 months. Two patients had hepatotoxic transaminase levels. Three patients had both elevated transaminases and SUA levels.
Conclusion Isoniazid may also cause hyperuricemia besides elevation in transaminases in children.
Quality of Life after Rhinoplasty: A Prospective Study
Authors: Papadopulos Nikolaos A. , Liebmann Janina , Kloeppel Markus , Henrich Gerhard , Machens Hans-Günther , Staudenmaier Rainer , Niehaus Richard 
Published: March 2021

AbstractAs our previous studies have shown, cosmetic surgery has a positive correlation with postoperative well-being. The aim of this study was to prospectively examine the postoperative changes in quality of life (QoL) after a rhinoplasty. Thirty-four patients who underwent septorhinoplasty performed by a single surgeon from July 2015 to October 2018 reported in indication-specific self-developed and different validated questionnaires (FLZM or Fragen zur Lebenszufriedenheit Module, Freiburg Personality Inventor, Rosenberg self-esteem scale, Functional Rhinoplasty Outcome Inventory 17 [FROI-17], and Glasgow Benefit Inventory [GBI]) on the status of their QoL preoperatively (T0) and 6 months' follow-up (T1). Our goal was to assess the difference in psyche and self-esteem and to get objective insights into the effect of the operation. Significant improvements in QoL in terms of general module, health, and appearance were noted. The general part of the FLZM showed increasing T1 values in the sum scores (p = 0.005). With regard to the item “health,” T1 was better than the norm data (p = 0.003). The statistically significant improvement for the item nose appearance (p < 0.0001) after operation and T1 versus reference data (p < 0.010) should be highlighted. The subjective patient ratings showed statistically significant T1 improvements for all items of the FROI-17: overall nose (p < 0.0001), nasal function (p = 0.001), general/further symptoms (p = 0.006), and confidence increased by aesthetic changes (p < 0.0001). Furthermore, the GBI score shows an improved QoL after rhinoplasty (p < 0.0001). Based on the assessment of a variety of disease- and nondisease-specific validated questionnaires, numerous improvements in the QoL of the patients were observed. Therefore, we support septorhinoplasty as a meaningful procedure regarding QoL improvement. The level of evidence is Level II prospective cohort study.
Q-band high-performance notch filters at 56 and 77 GHz notches for versatile fusion plasma diagnostics
Authors: Nishiura M. , Shimizu T. , Kobayashi S. , Tokuzawa T. , Ichinose K. , Kubo S. 
Published: March 2021

A six-pole Q-band waveguide filter with a notch frequency above the Q-band has been developed for plasma diagnostics. The previous paper [Nishiura et al., J. Instrum. 10, C12014 (2015)] reported that the notch frequency exists within the standard band. In this study, the newly required notch filter extends the function, which prevents a thorny wave from being mixed into an instrument beyond the standard bandwidth of the waveguide. The mode control technique for cavities realizes a deep and sharp filter shape for Q-band notch filters with 56 and 77 GHz notches, respectively. The former filter has an attenuation more than 50 dB at 56.05 GHz and a bandwidth of 1.1 GHz at −3 dB. The latter filter has an attenuation more than 55 dB at 76.95 GHz and a bandwidth of 1.6 GHz at −3 dB. The electron cyclotron emission imaging and the electron cyclotron emission (ECE) diagnostics for the Q-band implemented a pair of the fabricated filters and demonstrated the ECE measurement successfully in the intense stray radiation from a 56 GHz gyrotron.
SPHINCS_BSSN: a general relativistic smooth particle hydrodynamics code for dynamical spacetimes
Authors: Rosswog S , Diener P 
Published: March 2021

Abstract
We present a new methodology for simulating self-gravitating general-relativistic fluids. In our approach the fluid is modelled by means of Lagrangian particles in the framework of a general-relativistic (GR) smoothed particle hydrodynamics (SPH) formulation, while the spacetime is evolved on a mesh according to the Baumgarte–Shapiro–Shibata–Nakamura (BSSN) formulation that is also frequently used in Eulerian GR-hydrodynamics. To the best of our knowledge this is the first Lagrangian fully general relativistic hydrodynamics code (all previous SPH approaches used approximations to GR-gravity). A core ingredient of our particle–mesh approach is the coupling between the gas (represented by particles) and the spacetime (represented by a mesh) for which we have developed a set of sophisticated interpolation tools that are inspired by other particle–mesh approaches, in particular by vortex-particle methods. One advantage of splitting the methodology between matter and spacetime is that it gives us more freedom in choosing the resolution, so that—if the spacetime is smooth enough—we obtain good results already with a moderate number of grid cells and can focus the computational effort on the simulation of the matter. Further advantages of our approach are the ease with which ejecta can be tracked and the fact that the neutron star surface remains well-behaved and does not need any particular treatment. In the hydrodynamics part of the code we use a number of techniques that are new to SPH, such as reconstruction, slope limiting and steering dissipation by monitoring entropy conservation. We describe here in detail the employed numerical methods and demonstrate the code performance in a number of benchmark problems ranging from shock tube tests, over Cowling approximations to the fully dynamical evolution of neutron stars in self-consistently evolved spacetimes.
How to get from static to dynamic electromagnetism
Authors: König Jürgen 
Published: March 2021

Abstract
We demonstrate how to derive Maxwell’s equations, including Faraday’s law and Maxwell’s correction to Ampère’s law, by generalizing the description of static electromagnetism to dynamical situations. Thereby, Faraday’s law is introduced as a consequence of the relativity principle rather than an experimental fact, in contrast to the historical course and common textbook presentations. As a by-product, this procedure yields explicit expressions for the infinitesimal Lorentz and, upon integration, the finite Lorentz transformation. The proposed approach helps to elucidate the relation between Galilei and Lorentz transformations and provides an alternative derivation of the Lorentz transformation without explicitly referring to the speed of light.
Modular elastic metasurfaces with mass oscillators for transmitted flexural wave manipulation
Authors: Lin Zibin , Xu Weikai , Xuan Chengming , Qi Wuchao , Wang Wei 
Published: March 2021

Abstract
In the present study, a modular mass oscillator elastic metasurface (MMEM) is proposed to manipulate the wavefield of flexural waves by assembling and replacing mass-oscillator-like functional units. Based on the bandgap analysis of phononic crystals, the MMEMs were found to achieve a full

2
π

range of phase shift with relatively high transmission using functional unit arrangements of varying sizes (masses). According to the generalized Snell’s law, the modulation of abnormal refraction, lens focusing, and beam self-acceleration can be realized. To broaden the operating frequency domain, we present the idea of a multiple mass oscillator array design, which can control flexural waves at broadband frequencies of 13–41 kHz by adding/removing mass oscillators within a functional unit. This study presents a method to realize tunable metasurfaces and provides an innovative concept for broadening the operating frequency of elastic metasurfaces.
Quantify the combined effects of temperature and force on the stability of DNA hairpin
Authors: Li Lin , Wang Hongchang , Xiong Caiyun , Luo Di , Chen Hu , Liu Yanhui 
Published: March 2021

Abstract
OxDNA, as a successful coarse-grain model, has been applied to reproduce the thermodynamic and mechanical properties of both single- and double-stranded DNA. In current simulation, oxDNA is extended to explore the combined effects of temperature and force on the stability of DNA hairpin and its free energy landscape. Simulations were carried out at different forces and temperatures, at each temperature, a 18-base-pair DNA hairpin dynamically transited between folded state and unfolded state, and the separation between two states is consistent with the full contour length of single-stranded DNA in the unfolded state. Two methods were used to identify the critical force of DNA hairpin at each temperature and the critical forces obtained from two methods were consistent with each other and gradually decreased with the increasing temperature from 300 K to 326 K. The critical force at 300 K is reasonably consistent with the single molecule result of DNA hairpin with the same stem length. The two-state free energy landscape can be elucidated from the probability distribution of DNA hairpin extension and its dependence on the force and temperature is totally different. The increasing temperature not only reduces the free energy barrier, but also alters the position of transition point along the extension coordinate, resulting in the reduction of folding distance and the extension of unfolding distance, but their sum is not obviously dependent on the temperature. Generally, an assumption that the location of transition state in two-state energy landscape is independent of the stretching force is used to analyze the data of the single molecule experiment, but current simulation results indicate that effects of stretching forces on the location of transition state in two-state energy landscape are dependent on temperature. At relatively high temperature, stretching force can also change the location of transition state in the free energy landscape.
Asymmetry in the propagation of vortex domain wall artificial skyrmion composite system
Authors: Eilmsteiner D , Wang Xi-guang , Chotorlishvili L , Paischer S , Hoffmann M , Buczek P , Ernst A 
Published: March 2021

Abstract
We studied the propagation of an artificial skyrmion coupled to the vortex domain wall (VDW). We discovered the following effect: depending on the propagation’s direction, the dynamics of the coupled skyrmion VDW can be faster than the isolated VDW’s velocity. The reason for such behavior is the structural distortion that occurs in the coupled system. We interpret the numerical results in terms of the modified Thiele’s equation. In particular, increasing the Thiele’s equation counteractive coefficient leads to the perfect fitting with the micromagnetic simulation results.
Longitudinal magnetoconductivity of tilted type-I Weyl semimetals from semiclassical to ultra-quantum regime
Authors: Shao Jianmei , Yan Lijuan 
Published: March 2021

Abstract
Weyl semimetals (WSMs) display many unusual magnetotransport phenomena. Here, based on the Landau quantization and Boltzmann equation, we theoretically study the longitudinal magnetoconductivity for tilted type-I WSMs from weak to strong magnetic field within a unified framework. It is found that, in semiclassical (weak magnetic field) regime, the conductivity has an angular dependent B-linear term besides the B-quadratic term common to isotropic nodes. In ultra-quantum (strong magnetic field) regime, the magnetoconductivity shows a linear dependence on B, and this dependence is affected by the tilt. In the intermediate regime, magnetoconductivity shows a tilt-modified quantum oscillation behavior due to the oscillation in the density of state. These findings recover the results for isotropic nodes without tilt, and suggest a possible way to identify the tilt axis of tilted WSMs through magnetotransport experiment.
Design, construction and traceable calibration of a phosphor-based fibre-optic thermometer from 0 °C to 650 °C
Authors: Lowe D , Sutton G , Sposito A , Machin G , Pearce J 
Published: March 2021

Abstract
Measurement traceability, in which there is a documented chain of calibration links from a measurement back to a primary realisation of a unit, is vital for achieving the smallest uncertainty in metrology. A sensor that can provide a traceable link in harsh environments may be advantageous even if its uncertainty is larger than that of typical calibrated devices. A phosphor-based thermometer that has optical rather than electrical connections has been built and then calibrated in terms of the International Temperature Scale of 1990. Its standard uncertainty ranges from 0.5 °C at 0 °C to 2 °C at 650 °C. While this uncertainty cannot match what is possible with thermocouples or resistance thermometers, the optical basis of the sensor means it can be used in situations where electrical connections are precluded.
Mechanics of penta-graphene with vacancy defects under large amplitude tensile and shear loading
Authors: Han Tongwei , Wang Xueyi , Zhang Xiaoyan , Scarpa Fabrizio , Tang Chun 
Published: March 2021

Abstract
Penta-graphene is a new two-dimensional metastable carbon allotrope composed entirely of carbon pentagons with unique electronic and mechanical properties. In this work we evaluate the mechanical properties of new classes of defective penta-graphene (DPG) subjected to tensile and shear loading by using molecular dynamics simulations. The types of defects considered here are monovacancy at either 4-coordinated C1 site or 3-coordinated C2 site, and double vacancy (DV). We focus in particular on the effects of the different topologies of defects and their concentrations on the elastic constants and the nonlinear mechanics of this allotropic form of carbon. The results indicate that DPG has a plastic behavior similar to pristine penta-graphene, which is caused by the irreversible pentagon-to-polygon structural transformation occurring during tensile and shear loading. The tensile and shear moduli decrease linearly with the concentration of defects. Monotonic reductions of the tensile yield and shear stresses are also present but less pronounced, while the yield strains are unaffected. Penta-graphene with 4-coordinated and DVs feature a change of the Poisson’s ratio from negative to positive when the defect concentration rises to about 3% and 6%. Temperature can trigger structural reconstruction for free-standing DPG. The critical transition temperature increases due to the vacancy defects and the defects can delay the structure transition. These findings are expected to provide important guidelines for the practical applications of penta-graphene based micro/nano electromechanical systems.
Direct determination of complex amplitude of arbitrary ultrashort pulses via spectral phase conjugation
Authors: Lam Billy , Guo Chunlei 
Published: March 2021

Abstract
Unambiguous determination of the electric field of arbitrary ultrashort pulses is the key for time and frequency standards, attosecond science, and precision spectroscopy. However, a single-step technique that can simultaneously and directly characterize the spectrum, spectral phase, and the carrier-envelope phase (CEP) information of an arbitrary ultrashort pulse remains elusive. This technological roadblock hinders the current field from studying non-repeating single-shot events, since ultrashort laser pulses are often unstable. Here, we introduce a single-step reference-free technique through polarization interfering electric field with phase inverted electric field (PIE-PIE) to directly measure arbitrary ultrashort pulses in single-shot operation without using any retrieval algorithm. PIE-PIE utilizes highly efficient spectral phase conjugation based on four-wave-mixing. The ability to fully determine the spectrum, spectral phase, and CEP of relatively low intensity single-shot pulses will revolutionize ultrafast sciences and enable studies of arbitrary non-repeating ultrafast events.
Application of THz-TDS Technology in on-line detection of vacuum degree of arc extinguishing chamber
Authors: Yang Yongxu , Dong Jinxiang , Yue Feng , Zhang Kun , Li Wei 
Published: March 2021

Abstract
Terahertz time-domain spectroscopy (THz-TDS) is a non-destructive detection technology for carrying information inside a sample through a wide-band terahertz pulse carrying medium information. This paper briefly describes the imaging principle, characteristics, development and application direction of THz-TDS technology. The theoretical basis of THz-TDS technology applied in vacuum degree on-line monitoring is analyzed and verified by experiments. The experimental results show that with the change of vacuum degree, the signal amplitude attenuation and time delay of THz spectrum will change regularly. It shows that the spectrum and absorption spectrum obtained by THz-TDS imaging technology can sensitively distinguish the change of pressure in vacuum environment, that is, the change of vacuum degree. At the same time, the related air environmental pollution information also has strong absorption characteristics in the terahertz band, which makes the use of terahertz spectroscopy technology to detect pollutants in the atmosphere have a good development prospect.
Effect of exogenous Selenium on the growth and Selenium accumulation of Talinum paniculatum (Jacq.) Gaertn
Authors: xia Tianqi , Peng Sihan , Ma Yaoqing , Zhong Yufeng , He Zhongqun 
Published: March 2021

Abstract
In this study, we added different Selenium (Se) concentrations (0 mg⋅kg−1, 2.5 mg⋅kg−1, 5.0 mg⋅kg−1, 10.0 mg⋅kg−1, 20.0 mg⋅kg−1) into soil to study the effect of Se on the growth, quality and Se content of Talinum paniculatum (Jacq.) Gaertn. The results show that different Se concentration has significant different influence on the growth of T. paniculatum. Low Se concentration can promote the growth of T. paniculatum, but high Se concentration would inhibit the growth of T. paniculatum. The chlorophyll content of T. paniculatum increased with the increase of Se concentration, which was beneficial to the photosynthesis of T. paniculatum. The Se content of T. paniculatum increased gradually with the increase of Se concentration, and the rule of Se content of T. paniculatum was root > leaf > stem. Taken together, the optimum concentration of Se in the soil of T. paniculatum cultivation was about 5.0∼10.0 mg⋅kg−1.
Research on Residual Strength Prediction Model of Corroded Pipeline Based on Improved PSO-BP
Authors: Tingke Li , Yuanchun Peng , Jiadi Li , Dulin  , Xingqin Lian 
Published: March 2021

Abstract
In this paper, an improved particle swarm optimization (PSO) BP neural network model is proposed. For standard particle swarm optimization algorithm (PSO) is the "premature" and lack of diversity in the late, this paper puts forward an improved particle swarm optimization algorithm (IPSO), using the improved particle swarm optimization algorithm to optimize the BP neural network, which improves the learning ability of the BP neural network and accelerates its convergence speed. The IPSO-BPNN prediction model was constructed by using the BP neural network optimized by improved particle swarm optimization, and was applied to the prediction of residual strength of corroded pipeline. The experiment was carried out by the real pipeline test blasting data set. The results show that the prediction accuracy of IPSO-BPNN is better than that of BPNN and PSO-BPNN.
Immobilization of soil Cd (II) by modified biochars
Authors: Li Ming , Fan Tingting , Huang Jianbo , Liu Qi , Ding Yifei , Zhang Han , Feng Zhiwang 
Published: March 2021

Abstract
Adsorption kinetics and isotherms of Cd2+ onto different types of biochar are studied in batch experiments. Three types of biochar (rice, wheat and corn straw biochar) and their phosphate or chitosan modified materials were used in this study. Results showed that Langmuir equation can better describe the adsorption isotherms of Cd2+ onto these biochars (r2 > 0.960). Among different types of biochars, rice straw biochar (RB) and its chitosan modified biochar (CRB) had highest adsorption capacity of Cd2+. RB, wheat straw biochar (WB) and their modified biochars were used to remediate Cd-contaminated soil. Soil pH values increased with the increasing of biochar dosage and chitosan modified biochar amended soil had the highest soil pH values. Contents of DTPA extractable Cd in soil decreased with the increase of biochar dosage and incubation time. Among different types of biochars, 5% CRB amended soil at 60 days of incubation had the lowest content of DTPA extractable Cd. This study showed that the application of modified biochars can effectively alleviate soil Cd contamination.
A review of bioremediation techniques for heavy metals pollution in soil
Authors: Jin Tuo , Shi Chenning , Wang Ping , Liu Jinpeng , Zhan Liuyang 
Published: March 2021

Abstract
Heavy metals polluted soil caused by sewage irrigation, industrial pollution, pesticides and fertilizers, and atmospheric deposition have a harmful effect on the environment, which is difficult to completely eliminate and will threaten the ecological environment, food safety, and human health. The treatment of soil heavy metals and soil safe utilization have become the top priority of the treatment of industrial land and farmland soil. The existing main methods of soil heavy metals remediation include physical remediation, chemical remediation and biological remediation. With changes in governance scenarios and technological innovations, the joint application of interdisciplinary technologies has become an important development direction for soil heavy metals remediation. Especially in the treatment of heavy metals polluted farmland, the combined use of multiple technologies can further improve the safe utilization of farmland. In this paper, the main bioremediation techniques of heavy metals were summarized based on the domestic and foreign literatures in order to provide reference for further research in this field.