Polarity - Science topic

This study compares COVID-19 pandemic policymaking in Hungary and Portugal. These EU member states are similar in most factors that potentially shape the health policy outcome of a pandemic: the level of economic development, the centralization of public administration system and legislature, and the health crisis management preparedness. Yet, the...

A second pair of sympatric species' second polar moments of inertness were compared in forest red millipedes Centrobolus. Second polar moments of inertness were significantly different (P-value calculator: P-value=0, Z score=-218.294460, n=2, 2). Second polar moments of inertness in C. fulgidus were 2253.5425 4 and in C. richardii were 1670.3840 4...

In the current most evolved design concept of a machine for accelerating and colliding muons, there exists two long ( $\sim$ 1km) channels for cooling newly created muons and anti-muons. Termed the ‘6D cooling channels’, the beam is cooled in momentum and position space using a series of alternating polarity solenoids which create an oscillating f...

Neutrophils, the most abundant white blood cells in the immune system, play a crucial role in breast cancer progression through their ability to polarize into two distinct phenotypes: N1 and N2. N1 neutrophils are considered antitumor effector cells that promote immune responses and inhibit tumour growth, while N2 neutrophils support tumour progres...

One pair of sympatric species' second polar moments of inertness were compared in forest red millipedes Centrobolus. Second polar moments of inertness were significantly different (P-value calculator: P-value=0.011222, Z score=2.282766, n=2, 2). Second polar moments of inertness in C. anulatus were 941.779350mm 4 and in C. inscriptus were 2534.3610...

A second pair of sympatric species' second polar moments of inertness were compared in forest red millipedes Centrobolus. Second polar moments of inertness were significantly different between the sexes (P-value calculator: P-value=0.035631, Z score=-1.8038, n=2, 2). Second polar moments of inertness in C. fulgidus and C. richardii females were 263...

Following the early simulation results for simple liquids, various hard body fluids have been used in molecular-based equations of state as a leading/reference term. This has been justified for normal liquids by the similarity of their structure, but for polar and associating ones, a direct application of hard body models has not been considered so...

This paper makes an argument for further examination of items for polarity (asymmetry) and disagreement that would otherwise be cast aside in pursuit of internal consistency in Likert-type item summated rating scale construction. Consideration of this additional information is informative for all items, but due to the nature of the process to enhan...

The colors of substances and emissions are determined by the width of the energy gap between frontier molecular orbitals. In general, significant structural transformation or chemical modification is essential to tune the energy gap. Herein, we reveal a hypervalent silicon compound that can form both square pyramidal (SPY) and trigonal bipyramidal...

In this paper, we study the modulation of the optical field’s spatial coherence by using a polarization-independent metasurface model composed of Si cylinders. Based on the waveguide-phase principle, the cylinders’ radii and height are optimized to obtain a nearly linear phase variation of ${2}\pi$ . The statistical metasurface is constructed by us...

A novel polarization conversion metasurface (PCM) is designed and used for radar cross section (RCS) reduction. The PCM unit can implement polarization conversion ratio over 97% from 10.1 to 21.1 GHz. By loading the PCM array into the centre of the dual-band CP antenna which works in the X- and Ku-band simultaneously, a new low-RCS antenna is propo...

Polarization is a fundamental property of light that can be engineered and controlled efficiently with optical metasurfaces. Here, we employ chiral metasurfaces with monoclinic lattice geometry and achiral meta-atoms for resonant engineering of polarization states of light. We demonstrate, both theoretically and experimentally, that a monoclinic me...

The electrical characteristics of a carbon nanotube can be significantly modified by applying elastic strain. This study focuses on exploring this phenomenon in a single-walled carbon nanotube (SWNT) using tight-binding transport calculations. The results indicate that, under specific strains, an armchair SWNT can act as a filter, separating the tw...

This study presents a detailed timing analyses of two cataclysmic variables (CVs), [PK2008] HalphaJ115927 and IGR J14091-6108, utilizing the optical data from the Transiting Exoplanet Survey Satellite. Periods of 7.20 ± 0.02 hr, 1161.49 ± 0.14 s, and 1215.99 ± 0.15 s are presented for [PK2008] HalphaJ115927, and are interpreted as the probable orbi...

Memristor sparks interest in neuromorphic and bioinspired systems owing to its dynamic conductance, which resembles chemical synapse. However, the conductivity of a memristor depends strongly on the amount and direction of the flowing charge through it, and it is primarily due to its intrinsic asymmetry. This phenomenon becomes disadvantageous and...

This paper elucidates the motion of a particle in space in polar cylindrical coordinate system. The physics of particle motion was explained involving defining spatial points in three-dimensional polar coordinates and particle kinematics, in location, velocity and acceleration in their vector notations, and mathematically expressed as their coordin...

Aspect Sentiment Triplet Extraction (ASTE) is pivotal for nuanced sentiment analysis, demanding precise identification of aspect terms, opinion terms, and their associated sentiment polarities. Existing methods often rely on additional networks, such as graph neural networks, to exploit semantic and syntactic knowledge from reviews. However, these...

We present a design of an acoustic levitator composed of 35 ultrasonic transducers operating at 40 kHz configured to form a spherical cavity. The acoustic radiation force measured experimentally in the center of the cavity is \documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepacka...

Plasmonic materials enable flexible optical manipulation owing to their unique plasmon resonance, making them highly promising for photoelectronic imaging attenuation. However, designing plasmonic materials capable of multifaceted imaging attenuation remains challenging. This study theoretically designed and experimentally prepared a unique dual no...

We describe the design, construction, and operation of polarizers able to deliver ³He gas with high nuclear polarization to external volumes in a very flexible way. They combine metastability-exchange optical pumping, the only method that can rapidly polarize ³He nuclei (at pressures in the millibar range) and peristaltic compression, which is used...

Background The transplanum polare approach is a surgical technique targeting mesiotemporal structures, such as the amygdala and hippocampus. It offers a safer alternative to transcortical and transsylvian routes, reducing risks to white matter tracts, optic radiations, and vascular structures. Method This method involves a pterional craniotomy wit...

Li metal is known as the most ideal anode material for Li-ion batteries due to its high theoretical capacity (3860 mA h g⁻¹) and low redox potential (−3.04 V vs. SHE). However, the dendrite growth and volume expansion caused by inhomogeneous and loose Li deposition limit the practical application of Li metal anode. Herein, oxidized carbon cloth (OC...

In recent years, an increasing number of noncovalent interactions, such as hydrogen bonds, halogen bonds, and π···π interactions, have been widely applied in catalyzing organic synthesis reactions. Compared to traditional methods, these interactions offer advantages such as milder reaction conditions, lower toxicity, and higher catalyst turnover ra...

In this paper, we develop a lattice Boltzmann scheme based on the vielbein formalism for the study of fluid flows on spherical surfaces. The vielbein vector field encodes all details related to the geometry of the underlying spherical surface, allowing the velocity space to be treated as on the Cartesian space. The resulting Boltzmann equation exhi...

The Electron-Ion Collider (EIC), to be built at Brookhaven National Laboratory, will collide a polarized high-energy electron beam with polarized proton and light ion beams in the center-of-mass energy range of 20–140 GeV, achieving a maximum peak luminosity of up to 1 × 10 34 cm − 2 s − 1 for the proton and electron collisions. To achieve such a h...

Diaspore comprises a collection of seed coats and other organ components that effectively protect the embryo and dispersal. The mucilage in many species, a gelatinous mixture of cell wall polysaccharides, is secreted by the pericarp. Although the modification, synthesis, and secretion of the strain of mucilage as well as structure and roles of plan...

Tumbuhan tembelekan merupakan gulma pada lahan pertanian di daerah tropis dan subtropis. Komponen kimia aktif ekstrak etanol dan etil asetat dikarakterisasi menggunakan FTIR dan GC-MS. Hasil uji fitokimia menunjukkan bahwa senyawa golongan steroid terdeteksi pada kedua ekstrak, sedangkan senyawa golongan saponin dan tanin hanya terdeteksi pada e...

We present the observation of an orientation-resolved Cooper-like minimum in the high-order harmonic spectrum from an asymmetric CO molecule employing the time-dependent density functional theory. By applying a linearly polarized field, we find that obvious minimum contributed by HOMO can be observed in the pure even harmonics with the polarization...

The predisposition of amino acids towards accepting the appropriate secondary structure form is ambiguous. The identified sequences (6–12 aa in length – ChSeq data base) of the chameleon type (the same sequence accepting different secondary structures) constitute a puzzle that makes it difficult to indicate the initial conformation in a chain with...

How, can the negative effects of partisan polarization on democratic attitudes be mitigated? Can polarized individuals be persuaded to choose democracy over party, that is, support a candidate from an opposing party who upholds democratic norms when their co-partisan candidate fails to do so? We tested the effect of an online civic education interv...

Two theoretical approaches to the enhancement of the P-or T-violation effects in polarized neutron transmission are compared in this paper. About 40 years ago theoretical predictions appeared of a possible huge (by a factor about a million) enhancement of P-violation effects in resonance neutron transmission. The P-violation experiment in neutron t...

Introduction The use of large, non-sample specific metabolite reference libraries often results in high proportions of false positive annotations in untargeted metabolomics. Objective This study aimed to measure and curate a library of polar metabolites and lipids present in cardiac microtissues. Results Untargeted ultra-high performance liquid c...

In this paper, we theoretically study how electron scattering on domain walls modifies the anomalous transverse conductivity on the surface of a magnetic semiconductor with a strong Rashba effect. The band structure of such a semiconductor, characterized by a nontrivial Berry curvature, determines the occurrence of a one-dimensional resonant state...

The polar decomposition theorem (PDT) makes it possible to express any Jones matrix as a combination of a pure polarizer and a pure retarder. We establish the relations that these two elements must have to produce a defective Jones matrix, where two polarization eigenstates coalesce into a single state to create an exceptional point (EP). We presen...

We extend our prior results on the worldline computation of the axial vector-vector-vector (AVV) triangle anomaly in polarized deeply inelastic scattering (DIS) to the finite mass case by computing in addition the pseudoscalar-vector-vector (PVV) triangle graph. For the well-studied QED case, we show explicitly how the off-forward AVV pole exactly...

Substituted azetidines are privileged heterocyclic scaffolds in medicinal chemistry and have become synthetic targets of high interest in recent years. With the goal of developing a new access to azetidines incorporating the pharmaceutically relevant trifluoromethyl group, the reactivity of 2‐(trifluoromethyl)‐1‐azabicyclo[1.1.0]butanes was investi...

Magnesium‐sulfur (Mg‐S) batteries have attracted growing interest as a promising candidate of post‐lithium‐ion battery systems due to their high energy density, natural abundance of Mg and S, and superior safety. However, they are severely inhibited by the sluggish electrochemical kinetics of interfacial Mg²⁺ desolvation and successive sulfur redox...

What are the effects of reason-giving on political attitudes? Both political philosophers and political scientists have speculated that defending proposals with reasons may change voters’ preferences. However, while models of attitude formation predict that the explicit justification of one’s political views may result in attitudes that are more id...

This work presents a voltage‐free strategy for creating and manipulating topological domains in freestanding BiFeO3 films via the flexoelectric effect. By introducing bulge‐like surface wrinkles into freestanding films, complexed polarization topological textures can be formed, i.e., center‐type domain state with a cylinder bubble domain pattern al...

The molecular Berry curvature plays an important role for electronic structure calculations within the adiabatic Born–Oppenheimer approximation and is connected to many magnetic phenomena such as the Aharonov–Bohm and the chirality-induced spin selectivity effect. For molecules in external magnetic fields, the Berry curvature is essential to achiev...

Four kinds of ellipsoidal microswimmer are proposed to precisely control the motion direction and velocity at a rotating magnetic field. Five motion behaviors including rolling, swinging, transitional, rotational, and move back and forth modes are found. The microswimmer keeps the swinging mode can change the motion direction, and the implementatio...

Context. To date, more than a hundred debris disks have been spatially resolved. Among them, the young system HD 120326 stands out, displaying different disk substructures on both intermediate (30-150 au) and large (150-1000 au) scales. Aims. We present new VLT/SPHERE (1.0-1.8 $\mu$m) and ALMA (1.3 mm) data of the debris disk around HD 120326. By c...

Spin polarization in the multiphoton ionization of the HI molecule with intense 395 nm, circularly polarized laser pulses is investigated theoretically. To this end, we numerically solve the time-dependent Schrödinger equation in the basis of spherical spinors employing the time-dependent single-center method. We investigate the influence of the io...

For the curl–curl type vector equation describing a monochromatic light wave in a Kerr medium, an exact substitution has been analyzed, which leads to a system of four first-order ordinary differential equations for functions of the transverse radial coordinate. This system includes the integer multiplicity m of a vortex in the longitudinal electri...

The primary challenge currently faced by bio-inspired polarized optical compasses lies in their poor environmental adaptability, resulting in low heading angle accuracy under complex weather conditions, such as cloudy and overcast days as well as when obscured by buildings. To enhance environmental adaptability, this paper first theoretically analy...

Linkages represent the key feature to affect the properties of covalent organic frameworks (COFs), where chemical perturbation on the linkage microenvironment often leads to a remarkable impact on their applications. Following this strategy, we directly functionalized the imine linkage with a cyano group to form an α‐iminonitrile‐linked COF (CityU‐...

Accurately predicting chemical reactions is essential for driving innovation in synthetic chemistry, with broad applications in medicine, manufacturing, and agriculture. At the same time, reaction prediction is a complex problem which can be both time-consuming and resource-intensive for chemists to solve. Deep learning methods offer an appealing s...

Conjugated polymers with deep‐positioned lowest unoccupied molecular orbital (LUMO) level and large electron mobility are highly pursued as n‐type organic thermoelectric materials. Herein, we synthesized a simple structured electron‐deficient quinoid building block, thieno[3,2‐b]thiophene‐2,5‐dione (TTD), via one step from a low‐cost starting mater...

We investigate experimentally and theoretically the behavior of the confined dark exciton in an InAs/GaAs semiconductor quantum dot, under the application of an external magnetic field in a Voigt configuration. We show that by varying the magnitude and direction of the external field one can accurately control the dark-exciton fine-structure splitt...

We analyze the time-resolved photoluminescence (PL) from the bulklike continuum of excited states of 450 nm emitting InGaN/GaN device structures that are based on wide quantum wells with 25 nm thickness. In its spectrally integrated form, the PL behaves as if it were dominated by radiative recombination, including an almost exponential decay reflec...

The conformational properties of semiflexible active polar linear and ring phantom polymers are analyzed analytically to shed light on their dependence on activity. Special attention is paid to the influence of the implemented bond force for discrete and continuous polymer models. In detail, the Gaussian semiflexible polymer model and a model with...

Ultra-reliable and low-latency communication (URLLC) in 6G networks is characterized by very high reliability and very low latency to enable mission-critical applications. The ability of a coding scheme to support diverse use cases requires flexibility on the part of the decoder. High reliability and low latency require decoders with improved error...

Polarization wiggling is an observational effect of a gravitational field on the polarization of electromagnetic radiation traversing it. We find that in linear gravity, the polarization wiggle rate contributions from scalar, vector and tensor perturbations are independent and gauge invariant. While vector and tensor perturbations do induce polariz...

Although studies on belief perseverance suggest that people resist evidence opposing their beliefs, recent research found that people were receptive to clear, belief-disconfirming evidence. However, this research measured belief change immediately after presenting the evidence, and belief change varied considerably across participants. In three pre...

The selection of fabrication method is essential in dielectric layer fabrication of the field-effect transistors. In this study, the second harmonic generation (SHG) signals are observed from the interfaces between high-κ dielectric layers fabricated by different methods and silicon substrate, a promising class of silicon-based microelectronic and...

We demonstrate a rapidly tunable waveplate based on a rotating z-cut quartz plate in a double-pass configuration. In contrast to previous single-pass implementations, where angular rotation of birefringent crystals causes significant beam path displacement, we show that the double-pass geometry effectively suppresses beam walk-off, reducing lateral...

The research on fast and accurate fault location technology in distribution networks is of great significance. Currently, many methods for fault location in distribution networks have been proposed, but most theories are difficult to solve the problem of fault location in multi branch distribution networks. Therefore, this paper analyzed the charac...

To understand the underlying microscopic mechanisms that drive ferroelectricity in AgNbO 3 , a response‐function calculation of its dielectric and dynamical properties in the paraelectric cubic structure, the precursor to its ferroelectric behavior, is conducted. The results reveal significant charge transfer along the NbO bond, with the Born effe...

Understanding the inner workings of neural embeddings, particularly in models such as BERT, remains a challenge because of their high-dimensional and opaque nature. This paper proposes a framework for uncovering the specific dimensions of vector embeddings that encode distinct linguistic properties (LPs). We introduce the Linguistically Distinct Se...

We have studied the preliminary breakdown (PB) process and its relation to the following positive first return stroke (RS) for 60 winter positive cloud‐to‐ground (+CG) lightning flashes using their 3D mapping data by Discone Antenna Lightning Mapping Array in conjunction with the E‐field change information by Fast Antenna Lightning Mapping Array. 3...

Ferroelectricity in BaTiO3 was observed nearly eighty years ago, but the mechanism underlying its ferroelectric-paraelectric phase transition remains elusive. The order-disorder transition has been recognized as playing a critical role, however, the precise nature of the order parameter still remains under scrutiny, including the local dipole direc...

Polar ecosystems are on the forefront of climate change, yet large parts of our polar seas remain unexplored. This affects our ability to detect change in these regions and hampers global science driven conservation efforts. In Greenland, which is heavily reliant on demersal fisheries, this also affects the economy by complicating sustainability ce...

A transparent large-scale sapphire approximately 250 mm in diameter and about 30 kg in weight were grown by the Kyropoulos technique along the crystallographic direction. An analysis of the crystallization front shape at various stages of crystal growth was carried out. The dislocation structure was studied by selective chemical etching and X-ray d...

Polarization imaging is essential to reveal rich information of the vectorial nature of microwaves. However, selective imaging of specific polarization components with subwavelength resolution remains challenging. Here, we propose atom-based polarization holography for all-optical polarization-filtered subwavelength imaging in microwave regime. A k...

We present the experimental demonstration of laser nanostructured silica modal waveplates that allow the generation of pure Laguerre–Gauss modes whose azimuthal order sign l is controlled by the spin state of an incident circularly polarized Gaussian beam of fixed radial order p. This overcomes the previous limitation of laser nanostructuring techn...

Against the backdrop of globalization and the complex relationship between the Chinese and American film industries, integrating Chinese elements into Hollywood science fiction films has drawn significant attention. This study focuses on the perspective of cross-cultural communication. It takes 15 Chinese audiences who have watched relevant films a...

A reconfigurable antenna with simple polarization switching mechanism and compact size characteristics is presented in this paper. The primary radiating aperture of the proposed design is four parasitic elements arranged in a 2 \documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepac...

As one of the fundamental elements of light-driven nanomachines, plasmonic nanorotators based on optical lateral forces have gained much attention in recent years. It is expected that steering plasmonic nanorotators by vector beams will be more versatile, but the relevant studies are still lacking. Here, we present a comprehensive theoretical and n...

Extended Abstract The main objective of this article is to show that agreements and disagreements related to an issue or a text are not necessarily contradiction bur may be polar opposites. This is a main reason why they may play in intellectual dialogue, participatory writing, and transdisciplinary communication a synergic role.

The detection of sarcasm in text is an inherently difficult task due to its reliance on context, tone, and often implied meaning. This research proposes a novel approach to sarcasm detection that does not rely on complex neural networks but instead utilizes a combination of lexical analysis, sentiment analysis, and semantic word embeddings. Specifi...

Arctic cyclones play a crucial role in Arctic weather and climate. It has been shown that Arctic cyclones of different origins have different structural characteristics. In this study, we examine the contributions of Arctic cyclones of polar (ACP) origin and Arctic cyclones of midlatitude (ACM) origin to poleward heat transport in the Arctic using...

Photoelectron circular dichroism (PECD) in the ionization of chiral molecules by circularly polarized radiation is a well-established tool for chiral recognition in the gas phase. The effect consists in a forward-backward asymmetry in angular emission distributions of photoelectrons with respect to the light propagation direction, which survives av...

We present a novel implementation technique of single-shot full-field optical coherence tomography (S-FF-OCT) by utilizing a single-sensor polarization camera. S-FF-OCT is capable of acquiring interference image information in a single camera capture with a short signal integration time, which makes it particularly advantageous for tomographic imag...

Circularly polarized light (CPL), when tightly focused, can generate longitudinal spin-induced orbital angular momentum (OAM) through spin-to-orbit conversion (STOC). While STOC in single-focal systems is well studied, multi-focal STOC remains underexplored. In this Letter, we proposed a multi-focal STOC strategy that leverages tightly focused CPL...

Within the curl-curl type vector equation describing a monochromatic light wave in a focusing Kerr medium, the transverse structure of extremely narrow linearly polarized self-focused optical beams is found numerically with a high accuracy. For such two-dimensional spatial solitons of their width just about one wavelength, all the three components...

This research examines whether Airbnb guests' positive and negative comments influence acceptance rates and rental prices across six U.S. regions: Rhode Island, Broward County, Chicago, Dallas, San Diego, and Boston. Thousands of reviews were collected and analyzed using Natural Language Processing (NLP) to classify sentiments as positive or negati...

The reactivity of two dinuclear palladium complexes, [PdMe(P^AzA)]2 (1; P^AzA = [Ph2P(C6H4)NCHC(CH3)2]–) and [Pd(P^AzA)]2 (2), toward small molecules was evaluated. First, an optimized synthesis of 2 was demonstrated, which involved P^AzA ligand coordination to the Pd(I) dinuclear precursor [Pd(MeCN)3]2[BF4]2. Complexes 1 and 2 were treated with th...

Compared to common vinyl anions, their heavier heteronuclear analog, silagermenides [R2Si═GeR]ˉ, remain exceedingly rare. Herein, we present a systematic investigation of silagermenides, synthesized via a straightforward desilylation route. We delve into the bonding characteristics, revealing a weak, polarized Si─Ge π bond with a significant nonbon...

Summer Arctic cyclones (ACs) are long-lived, synoptic-scale features associated with strong winds and precipitation that can lead to reductions in sea ice. Consequently, a better understanding of the upper-tropospheric low-level thermodynamic features that limit the predictability of these storms may lead to better sea ice predictions. Here, the po...

Einstein's perihelion advance formula can be given a geometric interpretation in terms of the curvature of the ellipse. The formula can be obtained by splitting the constant term of an auxiliary polar equation for an elliptical orbit into two parts that, when combined, lead to the expression of this relativistic effect. Using this idea, we develop...