PEAKS - Science topic

This paper proposes a current-reference generation method including current harmonic injection (CHI) for enhancing the torque capability of multiphase induction machines (IMs) with negligible space-harmonic effects, which is useful, e.g., during transient overload in electric vehicles. The admissible torque is increased because the harmonics reduce...

The dynamic properties of assembled structures are governed by the substructure dynamics as well as the dynamics of the joints that are part of the assembly. It can be challenging to describe the physical interactions within the joints analytically, as slight modifications, such as static preload, temperature, etc. can lead to significant changes i...

It is widely accepted that near-fault pulse-like ground motions potentially cause more severe damage to structures than ordinary ground motions. However, the effects of stochastic pulse-like ground motions on underground structures are not effectively considered. The impacts of response spectra of pulse-like ground motions on seismic response are a...

The mechanism of rail short pitch corrugation has remained elusive in the past. The damage mechanisms of the corrugation are reported to be differential wear or plastic deformation. The former has been extensively studied, while the plastic deformation, especially under multiple wheel passages has been seldom studied. To uncover the facts behind it...

The material model proposed by Megalooikonomou et al. (2012) was added to the source code of OpenSees as a uniaxial material. In order to evaluate the performance of this material model, it was implemented in the simulation of a series of shaking table tests performed by Kumar and Mosalam (2015). The two test specimens, having identical geometry an...

Nanoparticles materials with proper structural properties are excellent candidates for the remediation of wastewater. In this study, mesoporous gamma-alumina was synthesized from kaolin using polyoxyethylene (40) stearate (PS) surfactant. The XRD diffractogram of the alumina revealed broad peaks that indicated the small crystallites. The FTIR spect...

Cerianite (CeO 2) is one of the key minerals controlling the behavior of rare earth elements (REE) in supergene environment, yet little is known about the composition and structure of the mineral. We present Raman spectroscopy and compositional data on regolith cerianite from carbonatite-related super-gene REE deposits. Cerianite showed a low conte...

In this study, V-doped, Al-doped, (Al,V)-doped, and pure ZrO2 powders were prepared using a complex polymerization method, and the thermally decomposed products were characterized using powder X-ray diffraction (XRD) and scanning electron microscopy (SEM). After calcination at 500 °C in air, several small broad peaks were observed in the XRD patter...

Graphene (GN) nanosheets have been widely exploited in biomedical applications as potential nanocarriers for various drugs due to their distinct physical and chemical properties. In this regard, the adsorption behavior of cisplatin (cisPtCl2) and some of its analogs on a GN nanosheet was investigated in perpendicular and parallel configurations by...

CdO-FePO 4 composite nanopowders (CNPs) with V 2 O 5 ions as dopants are prepared by a sol-gel technique. The as-synthesized CNPs are characterized by peak profile analysis of powder X-ray diffraction (XRD) and Transmission electron microscopy (TEM). The powder XRD analysis reveals that the prepared products are crystalline with the cubic phase of...

Cathodoluminescence spectroscopy is used to investigate the formation of point- and extended defects in SiC power MOSFETs exposed to heavy-ions. Devices showing single event leakage current (SELC) effects are analysed and compared to pristine samples. Common luminescence peaks of defect centers localized in the thermal-SiO 2 are identified, togethe...

In countries with a school-entry cutoff date, individuals born right after the cutoff are almost 1 year older than individuals in the same school cohort born right before that date. Abundant research has documented that, as a result of that extra year of maturation and skill accumulation, older students in a cohort outperform their younger peers. I...

In this work, we report an innovative approach to improve the interface properties of SiC/SiO 2 metal oxide semiconductor (MOS) capacitors. High temperature (1350°C) oxidation under different ambient is followed by a combination of post-oxidation annealing (POA) treatments using N 2 , N 2 O and NO gases. TOF-SIMS analysis shows silicon and nitrogen...

Many recipes for realizing topological superconductivity rely on broken time-reversal symmetry, which is often attained by applying a substantial external magnetic field. Alternatively, using magnetic materials can offer advantages through low-field operation and design flexibility on the nanoscale. Mechanisms for lifting spin degeneracy include ex...

In this work, we prepared ultra-long Si-doped β-Ga2O3 nanowires on annealed Al2O3-film/Si substrate by low-pressure chemical vapor deposition (LPCVD) assisted by Au as catalyst. The length of nanowires exceeds 300 μm and diameters range from ~30 to ~100 nm in one-dimensional structures. The nanowires show good crystal quality and exhibit (201) orie...

Objective The objective of this study was to investigate the spatio-temporal distribution and epidemiological characteristics of hepatitis B in 96 districts and counties of Xinjiang and to give useful information for hepatitis B prevention and treatment. Methods Based on the incidence data of hepatitis B in 96 districts and counties of Xinjiang fr...

Moiré superlattices in van der Waals structures have emerged as a powerful platform for studying the novel quantum properties of two-dimensional materials. The periodic moiré patterns generated by these structures lead to the formation of flat mini-bands, which alter the electronic energy bands of the material. The resulting flat electronic bands c...

All-dielectric terahertz metasurface absorbers have aroused widespread attention over the past few years for their flexible design concepts and excellent absorbing properties. However, the existing all-dielectric terahertz metasurface absorbers are subjected to poor tunability. In this study, a high-efficiency magnetically tunable terahertz all-die...

Thermal error compensation of high-speed motorized spindle is one of the effective methods to improve the machining accuracy of CNC machine tools. In this paper, the variation law of the thermal error of the motorized spindle is studied, a method for selecting temperature sensitive points is proposed, and the thermal error prediction model is estab...

Herein, titanium-dioxide-decorated organic formamidinium lead bromide perovskite thin films grown by the one-step spin-coating method are studied. TiO2 nanoparticles are widespread in FAPbBr3 thin films, which changes the optical properties of the perovskite thin films effectively. Obvious reductions in the absorption and enhancements in the intens...

The severity and incidence of flash floods are increasing in forested regions, causing significant harm to residents and the environment. Consequently, accurate estimation of flood peaks is crucial. As conventional physically based prediction models reflect the traits of only a small number of areas, applying them in ungauged catchments is challeng...

This work proposes a semi-empirical model for the SEI growth process during the early stages of lithium-ion battery formation cycling and aging. By combining a full-cell model which tracks half-cell equilibrium potentials, a zero-dimensional model of SEI growth kinetics, and a semi-empirical description of macroscopic cell expansion, the resulting...

The coherent interaction between a two-level system and electromagnetic fields serves as a foundation for fundamental quantum physics and modern photonic quantum technology. A profound example is resonance fluorescence, where the non-classical photon emission appears in the form of a Mollow-triplet when a two-level system is continuously driven by...

Key message We developed a new method phenotypic recombination BSA/BSR (PR-BSA/BSR), which could simultaneously identify the candidate genomic regions associated with two traits in a segregating population. Abstract Bulked segregant analysis sequencing (BSA-seq) has been widely used for identifying the genomic regions affecting a certain trait. In...

An O-containing structure in coal can affect the pyrolysis process; however, the influence of the introduced O-containing functional groups has rarely been investigated. To study this issue, two kinds of representative coal were selected for superfine pulverization and chemical oxidation. The 13C-NMR and FTIR experiments demonstrated that O-contain...

A multi-purpose waveguide structure utilizing surface plasma polariton (SPPs) has been developed. This structure consists of a metal–insulator-metal (MIM) straight waveguide with a silver baffle, an analogous M-shaped cavity, and a semi-ellipse cavity. Utilizing the finite element method, the structure’s optical transmission properties and magnetic...

The electronic, magnetic, and optical behaviors of metals (M = Ag, Al, Au, Bi, Ca, Co, Cr, Cu, Fe, Ga, K, Li, Mn, Na, Ni) adsorbed on the SiC monolayer have been calculated based on density functional theory (DFT). The binding energy results show that all the M-adsorbed SiC systems are stable. All the M-adsorbed SiC systems are magnetic with magnet...

Emotion recognition through physiological signals is of great importance for the examination of psychological states and the development of biofeedback-based applications. Thanks to the emergence of the concept of metaverse and the integration of physiological signal trackers into smart devices, this field of study has become a necessity and a subj...

Radar observations of the surface of Mars and laser's distance measurement with a high resolution in height and along the route - made it possible to build a topographic map of Mars with a maximum height difference between peaks and valleys of about 32 km. The development of the surface of Mars takes place in the regime of plume tectonics. In the n...

In this paper, we propose a novel integrated sensing and communication (ISAC) complex convolution neural network (CNN) CSI enhancer for 6G networks, which exploits the correlation between the sensing parameters, such as angle-of-arrival (AoA) and range, and the channel state information (CSI) to significantly improve the CSI estimation accuracy and...

A new method for the preparation of polyaniline (PANI) films that have a 2D structure and can record high active mass loading (up to 30 mg cm−2) via acid-assisted polymerization in the presence of concentrated formic acid was developed. This new approach represents a simple reaction pathway that proceeds quickly at room temperature in quantitative...

The aerodynamics and aeroacoustics of a scaled model H-Darrieus vertical axis wind turbine (VAWT) with end plates and supporting structures is investigated at its design operational regime. A high-fidelity hybrid Lattice Boltzmann Method/Very Large Eddy Simulation model is achieved and coupled to an in-house aeroa-coustic propagation code SherFWH b...

We report the transmission spectra and electric field amplitudes of electromagnetic modes propagating in hybrid periodic/quasiperiodic multilayer photonic structures in one dimension (1D). We consider the case of the combination of biperiodic Bragg mirror and triperiodic Bragg mirrors with quasiregular (FB, Fibonacci) layered components. The corres...

Early in its history, Mars had abundant water. Today, part of the water is stored as ice, is closed in the structure of water-rich materials and is present in the atmosphere in small quantities. Condensing white clouds are observed over polar regions from late summer to early spring, as well as around high volcanic peaks. In the northern hemisphere...

This research is being conducted to learn more about various compounds and their potential uses in various fields such as renewable energy, electrical conductivity, the study of optoelectronic properties, the use of light-absorbing materials in photovoltaic device thin-film LEDs, and field effect transistors (FETs). AgZF3 (Z = Sb, Bi) compounds, wh...

The Van der Waals semiconductor metamagnet CrSBr offers an ideal platform for studying the interplay between optical and magnetic properties in the two-dimensional limit. Here, we carried out an exhaustive optical characterization of this material by means of temperature and magnetic field dependent photoluminescence (PL) on flakes of different thi...

Frictional properties of sliding surfaces have practical importance in a variety of applications. Therefore, the present study investigates the ageing or holding time-dependent static friction of a wet granular layer using a slide-free-slide (SFS) friction test. It is observed that the static friction varies as a logarithm of hold time. Further, th...

Toi et al. (Science, 378, 160-168, 2022) reported direct imaging of neuronal activity (DIANA) by fMRI in anesthetized mice at 9.4 T, which could be a revolutionary approach for advancing systems neuroscience research. There have been no independent replications of this observation to date. We performed fMRI experiments in anesthetized mice at an ul...

PEO/SNCs based nanocomposite electrolyte membrane complexed with MgBr2 salt (15 wt.%) was fabricated following conventional solution casting technique. The effect of incorporation of salt ions on microstructural properties of host matrix of PEO/SNCs were investigated by means of XRD, FTIR, DSC studies. The modifications in the nature of diffraction...

We report a rapid synthesis method for producing CsSnCl3:Mn2+ perovskites, derived from SnF2, and investigate the effects of rapid thermal treatment on their photoluminescence properties. Our study shows that the initial CsSnCl3:Mn2+ samples exhibit a double luminescence peak structure with PL peaks at approximately 450 nm and 640 nm, respectively....

In recent years, developing unsupervised machine learning for identifying phase transition is a research direction. In this paper, we introduce a two-times clustering method that can help select perfect configurations from a set of degenerate samples and assign the configuration with labels in a manner of unsupervised machine learning. These perfec...

Doping W into Li can greatly enhance the activity of Li-ion battery. However, the structures and properties of W-doped Li clusters remain elusive. In this study, we combined the global-minimum optimization and the density-functional theory calculations to systematically explore the lowest-energy structures of WLin (n = 2–12) bimetallic clusters and...

Terahertz (THz) metamaterials have attracted great attention due to their widely application potential in smart THz devices; however, most of them are fabricated on rigid substrate and thus limit the exploration of flexible THz electronics. In this paper, a flexible THz metamaterial absorber (MMA) incorporated with phase change material vanadium di...

Morocco's meteorological observation network is quite old, but the spatial coverage is insufficient to conduct studies over large areas, especially in mountainous regions, such as the Fez-Meknes region, where spatio-temporal variability in precipitation depends on altitude and exposure. The lack of station data is the main reason that led us to loo...

The smart city concept refers principally to employing technology to deal with different problems surrounding the city and the citizens. Urban mobility is one of the most challenging aspects considering the logistical complexity as well as the ecological relapses. More specifically, parking is a daily tedious task that citizens confront especially...

Despite its simple crystal structure, layered boron nitride features a surprisingly complex variety of phonon-assisted luminescence peaks. We present a combined experimental and theoretical study on ultraviolet-light emission in hexagonal and rhombohedral bulk boron nitride crystals. Emission spectra of high-quality samples are measured via cathodo...

The effect of FeCl3 loading in the poly (vinyl alcohol) (PVA) matrix can design composite films with improvement in the structural and optical properties. PVA/FeCl3 composite films with different contents of FeCl3 (0, 2.5, 5, 10, and 15 wt.%) were prepared by casting method. FTIR spectrophotometer and XRD pattern were utilized to examine the variat...

In this study, it is aimed to investigate the effects of production methods on the physical properties of 20% Ag2O and different ratios of Y211 added YBCO samples. In this context, the samples with Y123 + x % (x = 20, 25, 30) Y211 + 20%Ag2O compositions were fabricated by MPMG and TSMG methods in two groups to join YBCO main samples. XRD measuremen...

In this paper, an all-dielectric metastructure-based high-contrast refractive index sensor is proposed. This structure can be utilized to detect various concentrations of glycerol-water mixtures by evaluating transmission spectral lines and resonant wavelength shifts related with liquid concentration detection. The experimental and calculated resul...

Ship-based multi-axis differential optical absorption spectroscopy (MAX-DOAS) measurements were conducted along the marginal seas of China from 19 April to 16 May 2018 to measure the vertical profiles of aerosol, nitrogen dioxide (NO2), and nitrous acid (HONO). Along the cruise route, we found five hot spots with enhanced tropospheric NO2 vertical...

During the waves of the coronavirus disease (COVID-19) pandemic, emergency departments were overflowing with patients suffering with suspected medical or surgical issues. In these settings, healthcare staff should be able to deal with different medical and surgical scenarios while protecting themselves against the risk of contamination. Various str...

Gestures have been shown to be temporally linked to prosody, as strokes are synchronous to prominent syllables and pitch accents. However, their precise temporal coordination is still under debate. Exploring kinematics using a 2D motion analysis software, we inspected the temporal interaction between head, eyebrows and prosody in statements and yes...

The simulated moving bed (SMB) is a well-established, fully continuous process for chromatographic separation of difficult tasks with overlapping peaks, but it is relatively complex. The 1-SMB, which uses only one column but includes residence time zones to preserve concentration profiles, is a simpler semi-continuous alternative. This work examine...

a)] (b) Fig. 1. (a) Reduced and normalized SBP of As x S 100-x glasses and (b) differential LF Raman spectra (The LF spectrum of gAs 2 S 3 has been subtracted from the LF spectra of displayed compositions) Experimentally was found that the spectroscopic Boson peak (SBP) in Raman spectra has a tin fine structure and at frequencies less than the SBP...

To accurately determine the strength and the waveform of the partial discharge (PD) signal, especially if the source position is far from the ultra-high frequency (UHF) sensor or if the signal is weak, it is necessary to properly extract the most prominent PD from the background noise in the recorded signal. This paper provides a new procedure for...

The key role in the calculation of post-neutron fragment yields (independent FPY) is played by the pre-neutron fragment distributions Y(A,TKE) and the prompt neutron multiplicity (calculated in the frame of a prompt emission model). The knowledge of excitation energies of fully accelerated fragments is crucial in any prompt emission model. So that...

Nuclear Magnetic Resonance is a crucial technique for studying biological complexes, as it provides precise structural and dynamic information at the atomic level. However, the process of assigning resonances can be time-consuming and challenging, particularly in cases where peaks overlap, or the data quality is poor. In this paper, we present TINT...

Acute lymphoblastic leukaemia (ALL) is the most common malignancy in childhood and its incidence peaks during the first 2–5 years of life.The long-term survival of patients with ALL has increased to ∼90% with risk-directed therapy and improved supportive care. However, incidence of mould infections caused by Aspergillus species, and other emerging...

The Sierra Nevada and Southern Cascades—California’s snowy mountains—are primary freshwater sources and natural reservoirs for the states of California and Nevada. These mountains receive precipitation overwhelmingly from wintertime storms including atmospheric rivers (ARs), much of it falling as snow at the higher elevations. Using a seven-decade...

Primary open-angle glaucoma (POAG) and primary angle-closure glaucoma (PACG) are prevailing eye diseases that can lead to blindness. In order to provide a non-invasive diagnostic method for glaucoma, we investigated the feasibility of using drop-coating deposition Raman spectroscopy (DCDRS) to discriminate glaucoma patients from healthy individuals...

The growth of Sb2S3−xSex (x = 0, 0.1, 0.2, 0.3) crystals is carried out by the Bridgman technique with the help of a joule heating vertical zone furnace. This paper mainly addresses the thermoelectric properties and photoresponse of grown crystals. The crystals are found to be pure and stoichiometric, as observed from the EDAX spectra. The X-ray di...