Vacuum - Science topic

Recent advancements in vacuum arc technology have heightened interest in the evolutionary behavior of cathode spots, particularly in metal deuteride cathodes, due to their critical role in influencing device performance and longevity. Extensive research has elucidated various aspects of cathode spot erosion. A novel two-dimensional (2D) axisymmetri...

Some time ago, Seiberg and Witten solved for moduli spaces of vacua parameterized by scalar vacuum expectation values in N=2 gauge theories. More recently, new vacua associated to soft theorems and asymptotic symmetries have been found. This paper takes some first steps towards a complete picture of the infrared geometry of N=2 gauge theory incorpo...

The crisis of democracy in Tunisia continues, as President Kais Saied declared an indefinite suspension of parliament, which he has depicted as a threat to the state. Amidst this crisis, the indecisive attitude of international democratic actors has disappointed many and created a power vacuum for MENA strongmen to extend their political influence...

We consider the initial boundary problem of two-dimensional non-homogeneous incompressible heat conducting Navier-Stokes equations with vacuum, where the viscosity and heat conductivity depend on temperature in a power law of Chapman-Enskog. We derive the global existence of strong solution to the initial-boundary value problem, which is not trivia...

La revolución de las Tecnologías de la Información y la Comunicación (TIC) ha transformado múltiples sectores, incluida la educación. Este cambio lleva a los educadores y a los investigadores a explorar nuevas metodologías pedagógicas que puedan mejorar tanto la enseñanza como el aprendizaje (Gallo Macias, 2021). Sin embargo, la implementación efec...

A long-standing debate on Gibbons-Hawking (GH) decoherence centers on its obscure thermal nature. In this work, we investigate the robustness of quantum Fisher information (QFI) and local quantum uncertainty (LQU) in the presence of GH decoherence, using free-falling Unruh-DeWitt (UDW) detectors in de Sitter spacetime (dS-ST). The UDW detectors int...

Spontaneous symmetry breaking predominately occurs during the aggregation of discrete molecules in solution. Herein, we report a unique solid-state symmetry breaking process of dynamically chiral aza[4]helicenes that emerged in vacuum-driven transformation of halogen bond-woven crystals. Due to the weak feature of the halogen bonding, the halides i...

In this paper, we extend the functional approach for calculating the EFT likelihood by applying the saddle-point expansion. We demonstrate that, after suitable reformulation, the likelihood expression is consistent with the path integral required to be computed in the theory of false vacuum decay. In contrast to the saddle-point approximation, the...

This work investigates the interaction of backward and forward rarefaction waves for the one-dimensional isentropic dusty gas flow. Mathematically, this type of problem involves Goursat boundary value problem. By employing characteristic analysis and assuming the absence of vacuum in the initial data, it has been established that the vacuum does no...

The purpose of this paper is to investigate a metamaterial-based planar resistive wall amplifier and to demonstrate the applicability of simplified models for preliminary evaluations. Methods. Two two-dimensional models are considered. The first model constitutes of an infinitely wide sheet beam immersed in a strong longitudinal magnetic field prop...

Addressing the issues of easy deformation and difficult-to-control machining accuracy of thin-walled bearing rings during precision grinding due to clamping forces, existing research mainly employs methods such as elastic clamping, hydraulic control, pneumatic control, and vacuum adsorption to tackle the clamping problem. However, these methods sti...

Quantum-information processing and computation with bosonic qubits are corruptible by noise channels. Using interferometers and photon-subtraction gadgets (PSGs) accompanied by linear amplification and attenuation, we establish linear-optical methods to mitigate and suppress bosonic noise channels. We first show that by employing amplifying and att...

The problem of quantum measurement is analyzed, showing its limitations, when trying to reach objective reality starting from the conventional perspective that the universe is an isolated and self-contained system. The fundamental aspects on which the analysis of quantum measurement is based are the quantum superposition principle and the Heisenber...

Starting with the assumption that propagation of classical light determines the causal structure of spacetime and the assumption that the causal structure may be emergent from quantum correlations I show a method through which the causal structure can be engineered by the manipulation of carefully chosen ancillas that allow the manipulation of prop...

The KM3NeT collaboration recently reported the detection of an ultra-high-energy neutrino event, dubbed KM3-230213A. This is the first observed neutrino event with energy of the order of $\mathcal{O}(100)$PeV, the origin of which remains unclear. We interprete this high energy neutrino event results from the Dirac fermion dark matter (DM) $\chi$ de...

This work evaluated the results achieved in industrial tests carried out at SAMARCO's tailing filtration plant. Mixtures of flotation tailings (sandy tailings) and desliming tailings (slime) were tested, with proportions of slime in the mixture varying from 5% to 15%. Aiming to minimize the drop in the unit filtering rate caused by the addition of...

RESUMEN Este artículo presenta una revisión sistemática de la literatura publicada en las últimas dos décadas sobre el vínculo entre maternidad y carreras académicas, analizando su impacto, vacíos y sesgos. La evidencia sistematizada constata que la maternidad afecta negativamente la movilidad internacional, la productividad y el acceso a cargos ac...

The Lee-Wick pseudo-quantum electrodynamics in the presence of a Chern-Simons term is studied in this paper. The paper starts with a non-local lagrangian density that sets the Lee-Wick electrodynamics defined on a bidimensional space added to the Chern-Simons topological term. We investigate classical aspects as the potential energy for the interac...

CdTe films were obtained via discrete vacuum thermal evaporation (DVTE) with CdCl2 treatment and annealing in an air atmosphere. The CdTe samples were investigated using several techniques: energy-dispersive X-ray spectroscopy, scanning electron microscopy, atomic-force microscopy, grazing incidence X-ray diffraction, and Raman analysis. It has bee...

The possibility of two-photon laser spectroscopy of the nuclear clock transition (148.38 nm) in the ²²⁹ Th isotope has been investigated using an intense monochromatic laser field at twice the wavelength (296.76 nm). Our estimates show that due to the electron bridge process in the doubly ionized ion ²²⁹ Th ²⁺ the sufficient intensity of a continuo...

We examine a static spherically symmetric black hole metric that originates from the vacuum solution of the traceless metric-affine bumblebee model in which spontaneous Lorentz symmetry-breaking occurs when the bumblebee fields acquire a non-vanishing vacuum expectation value. A free Lorentz-violating parameter enters into the basic formulation of...

The running strong coupling is an important quantity, indicating the strength of the strong force at any given energy. Methods described in the literature for its computation are essentially all defined with respect to the renormalization group equations and these equations are associated with the method of renormalization for dealing with infiniti...

Este artículo es el resultado de mi participación en la Escuela Latinoamericana de Cienciometría, llevada a cabo en Cartagena de Indias, Colombia, en febrero de 2025. En este espacio de formación y debate, investigadores de diversas disciplinas exploramos metodologías avanzadas para analizar la producción científica. Durante estas sesiones, quedó c...

An optically levitated nanoparticle in a vacuum provides an ideal platform for ultra-precision measurements and fundamental physics studies because of the exceptionally high-quality factor and rich motion modes, which can be engineered by manipulating the optical field and the geometry of the nanoparticle. Nanofabrication technology with the abilit...

Brazing hybrid joints of additively manufactured and conventionally produced components made of IN718 opens new application possibilities for additive manufacturing processes, such as PBF-LB/M, in industrial production processes. The combination of hybrid structures enables cost-effective production of large-volume parts with complex features. In t...

El presente artículo de revisión científica propende por exponer las tendencias de alineación curricular para la formación de competencias investigativas en contextos educativos rurales a fin de implementar una propuesta de intervención pedagógica como eje de formación en cascada para la transformación de las prácticas educativas actuales. Ante est...

This paper proposes a novel link between vacuum behavior near reflective electromagnetic boundaries and the apparent nonlocality observed in quantum entanglement collapse. Specifically, it suggests that regions of field cancellation caused by interference between incident and reflected electromagnetic waves-such as those near a perfect conductor-su...

Cherenkov radiation, classically understood as electromagnetic emission due to charged particles exceeding the phase velocity of light in a dielectric medium, may possess a deeper, more exotic origin in certain quantum field theoretical contexts. We propose a speculative framework wherein the emission is not solely a kinematic consequence but poten...

Following our earlier derivations of the Planck constant and elementary charge, this paper completes the foundational framework of electromagnetic constants by deriving vacuum permittivity (ε 0) from fundamental dimensional symmetry. Within Laursian Dimensionality Theory (LDT), which interprets spacetime as a "2+2" dimensional structure-two rotatio...

Terrorism has been a cankerworm inflicting pain on all and sundry across the universe. The innocent civilians have been at the receiving end. The ugly situation is not an exception in Nigeria. The legal regime criminalises the act of terrorism and searches for permanent preventive measures which culminates in the amnesty grants to terrorists in the...

Starting from Euler's equations for an incompressible and inviscid cosmic fluid that permeates the entire Universe, we include the Lorentz-like acceleration from the gravito-electromagnetic field on the right-hand side of the equation, as an additional contribution to the total acceleration field acting on particles. A physically consistent solutio...

The future of global leadership structures is poised for significant transformation as economic power increasingly overshadows political authority. This shift necessitates a new breed of leaders who embody traits such as emotional intelligence, adaptability, and a commitment to collaboration, as highlighted by the Young Global Leaders of the World...

Based on the uncertainty principle of time and energy, dependences on the gravitational potential of quantum fluctuations in energy, mass, and vacuum density are found.

The absolute vacuum is the Mocombeian ontological name for the fifth dimensional probability wavefunction (the world of noumena, i.e., the in-itself) that gives rise to the material worlds, their facts, relations of ideas, and mathematical principles, we as a species experience. In this article, I utilize Mocombe's phenomenological structural epist...

The $\tau$ spectral functions are an alternative to $e^+e^-$ cross-sections, where different measurements are not consistent, for computing the hadronic vacuum contribution to the muon magnetic anomaly $a_\mu$. This requires a control of isospin-breaking effects which have to be corrected for. So far these corrections have been evaluated using theo...

A bstract Near the horizon of extremal charged black holes, an accidental symmetry is known to act on zero-temperature perturbations, transforming them into finite-temperature ones. In this paper, we uncover the corresponding accidental symmetry of the vacuum Einstein equation near the horizon of extremal spinning black holes. To do so, we first de...

Lithium is exceedingly receptive and combustible subsequently must be put away in a vacuum and dormant fluids. Lithium is utilized as a disposition stabilizer and upper in ailments like bipolar clutter. Too utilized as a combination fuel in thermonuclear weapons.

It is shown that at the present stage of the evolution of the universe, cosmological acceleration is an inevitable kine-matical consequence of quantum theory in semiclassical approximation. Quantum theory does not involve such classical concepts as Minkowski or de Sitter spaces. In classical theory, when choosing Minkowski space, a vacuum catastrop...

We study a scale invariant inverse seesaw model that radiatively generates the electroweak scale, the Standard Model (SM) neutrino masses, and stabilizes the electroweak vacuum. Previous studies have noted that the SM Higgs potential and the electroweak scale can be radiatively generated via the minimal seesaw mechanism. This scenario, called the `...

This study employs a corpus-based multidimensional analysis, as proposed by Biber, to investigate the linguistic features of Ernest Hemingway’s first novel, The Torrents of Spring, compared to his other works. Through a corpus analysis of 21,709 tokens from The Torrents of Spring as the study corpus and 725,674 tokens from eight of his later novels...

We consider a two-component dark matter model with $Z_2 \times Z_4$ symmetry, where a singlet scalar $S$ and a Majorana fermion $\chi$ are introduced as dark matter candidates. We also introduce another singlet scalar $S_0$ with a non-zero vacuum expectation value to the SM so that the fermion dark matter can obtain mass after spontaneous symmetry...

Optical interferometers, as precision measurement tools, inevitably experience optical path losses in practical applications, which introduce unavoidable vacuum noise and reduce the sensitivity in the phase estimation. To mitigate the effects of losses on sensitivity, we propose an enhanced interferometer scheme that integrates a Raman amplifier. T...

O setor alimentício se caracteriza por ser um setor que desempenha um papel fundamental na economia global. No entanto, enfrenta desafios significativos relacionados aos desperdícios durante a produção, armazenamento e transporte de alimentos. Desperdícios como tempo de espera, defeitos na cadeia de produtiva, desperdícios de processo e excesso de...

A bstract We investigate the properties of domain walls arising from non-Abelian discrete symmetries, which we refer to as non-Abelian domain walls. We focus on S 4 , one of the most commonly used groups in lepton flavour mixing models. The spontaneous breaking of S 4 leads to distinct vacua preserving a residual Z 2 or Z 3 symmetry. Five types of...

Analytic continuation from (3, 1) signature Minkowski to (2, 2) signature Klein space has emerged as a useful tool for the understanding of scattering amplitudes and flat space holography. Under this continuation, past and future null infinity merge into a single boundary ( J) which is the product of a null line with a (1, 1) signature torus. The M...

El siguiente artículo tiene como finalidad presentar una revisión actualizada de las investigaciones que se han publicado sobre la evaluación de las competencias y la integración del pensamiento computacional en áreas de conocimiento que tradicionalmente no están vinculados a la informática o la ciencia, tecnología, ingeniería y matemáticas (STEM,...

Recent studies have applied variational calculus, conformal mapping, and point transformations to generalize the one-dimensional (1D) space-charge limited current density (SCLCD) and electron emission mechanisms to nonplanar geometries; however, these assessments have focused on extending the Child-Langmuir law (CLL) for SCLCD in vacuum. Since the...

We consider an appealing scenario for the production of purely gravitational dark matter in the background of warm inflation, a mechanism that maintains stable thermal bath during inflation. Through systematic investigation of various gravitational production channels, we reveal distinctive features compared to the standard inflation scenario. Nota...

A bstract We consider a single real scalar field in flat spacetime with a polynomial potential up to ϕ ⁴ , that has a local minimum, the false vacuum, and a deeper global minimum, the true vacuum. When the vacua are almost degenerate we are in the thin wall regime, while as their difference in potential energy increases, we approach the thick wall...

We propose a cyclical cosmological model in which the universe transitions through four distinct phases-expansion and contraction in both a primary and a conjugated universe-modeled through the orthogonal interaction of curvature and vacuum energy. By representing the Einstein tensor G_ij and a generalized cosmological tensor Λ_ij as perpendicular...

In the present work, we pay attention to a number of nonlinear Volterra integro-differential equations (VIDEs) with constant time-lag. We define three new Lyapunov functionals (LFs) and employ them to get specific conditions guaranteeing the uniform exponential asymptotic stability (UEAS) of the trivial solutions of the (VIDEs) considered. The resu...

Manual processing of lipoaspirate can enhance stem cell concentration, thereby improving the take rate, which still represents a major challenge in autologous fat transfer. However, since the preparation consists of many manual steps that are difficult to standardize, we investigated the influence of residual tumescent solution on the macroscopic a...

A bstract We investigate the stability of topological charge under gradient flow taking the admissibility condition into account. For the SU(2) Wilson gauge theory with β = 2 . 45 and L ⁴ = 12 ⁴ , we numerically show that the gradient flows with the Iwasaki and DBW2 gauge actions stabilize the topological sectors significantly, and they have qualit...

I revisit the Wigner (or Weyl–Wigner, WW) representation of the quantum electromagnetic field. I show that, assuming that Fock states are just mathematical concepts devoid of physical reality, WW suggests a realistic interpretation which turns out to be (classical) Maxwell theory with the assumption that there is a random radiation filling space, t...

We outline a general framework for evaluating the nonperturbative soft functions in the quantum chromodynamics (QCD) instanton vacuum. In particular, from the soft function we derive the Collins-Soper (CS) kernel, which drives the rapidity evolution of the transverse-momentum-dependent parton distributions. The resulting CS kernel, when supplemente...

A bstract We explore scattering amplitudes on the Coulomb branch of maximally supersymmetric Yang-Mills theory. We introduce a particular pattern of scalar vacuum expectation values that allow us to define amplitudes with a different mass pattern compared to what was studied previously. This is motivated by an extension of the Amplituhedron that le...

El conflicto presentado en Barranco gira en torno al abandono de la comunidad hacia su entorno, de este modo, compromete la identidad cultural y colectiva del distrito. La falta de cuidado por los espacios públicos, como plazas, parques y calles, ha generado un vacío emocional que fragmenta la cohesión social y debilita el sentido de pertenencia de...

We study the possibility of producing axion dark matter (DM) via misalignment mechanisms in a non-standard cosmological era dominated by ultra-light primordial black holes (PBH). While the effect of PBH domination on the production of axion via vacuum misalignment is known assuming the PBH evaporation to proceed according to Hawking's semi-classica...

A bstract We present our lattice QCD result for the long-distance part of the hadronic vacuum polarization contribution, ( $$ {a}_{\mu}^{\textrm{hvp}} $$ a μ hvp ) LD , to the muon g − 2 in the time-momentum representation. This is the numerically dominant, and at the same time the most challenging part regarding statistical precision. Our calculat...

El glifosato, pese a representar riesgos para la salud humana y el ambiente, es uno de los agroquímicos más utilizados en el Perú y a nivel mundial. Motivado por ello, la presente investigación explora las razones detrás del vacío normativo en su prohibición, considerando que el marco legal peruano asigna responsabilidades claras a determinadas aut...

In this work, two alloys of Ni35Al30(FeCo)25Cr10-xMox (x = 0, 5) were prepared via the vacuum arc melting method, and the effects of Mo on the microstructure, mechanical properties, and friction and wear properties of the alloys were investigated. The addition of Mo improved the mechanical properties, wear resistance, and corrosion resistance of th...

A bstract It appears to be difficult within string theory to obtain genuine scale separation between spacetime and the internal sector. In this paper, we propose a novel mechanism for scale-separated vacua which hinges on stringy effects that are invisible at the level of effective field theory. We show that (meta)stable vacua can form if a super n...

We study gravitational waves in a de-Sitter background in linearized Horndeski theory. This background can be obtained in different ways in this theory. We first consider an arbitrary potential to implement an effective cosmological constant. The scalar field has long range whereas its potential can induce a mass term, rendering its range to short...

We examine the correlations between new scalar boson decays to photons and electric dipole moments (EDMs) in the C P -violating flavor-aligned two-Higgs-doublet model (2HDM). It is convenient to work in the Higgs basis { H 1 , H 2 } where only the first Higgs doublet field H 1 acquires a vacuum expectation value. In light of the LHC Higgs data, whi...

Este artículo examina de manera crítica el impacto de la jurisprudencia de la Corte Interamericana de Derechos Humanos (Corte IDH) en la transformación normativa del Ecuador y en la consolidación del sistema interno más robusto de protección de los derechos humanos. Se emplea una metodología cualitativa, de tipo descriptivo y explicativo, basada en...

Transient coaxial helicity injection (CHI) current start-up in a spherical tokamak (ST) has been demonstrated for the first time using a reactor-relevant floating single biased (FSB) electrode configuration on QUEST. Unlike previous applications of CHI on HIT-II and on NSTX in which the entire ST vessel was split in two using two toroidal ceramic r...

The classification of the Einstein spaces with the Stackel metric of the (3.0) has been done. These spaces are invariant under the action of the three-parameter abelian group of motions and belong to the first type Bianchi spaces. Thus the classification of vacuum and electrovacuum Stackel spaces of all types is completed and the complete list of m...

In this paper we prove integrated energy and pointwise decay estimates for solutions of the vacuum linearized Einstein equation on the domain of outer communication of the Kerr black hole spacetime. The estimates are valid for the full subextreme range of Kerr black holes, provided integrated energy estimates for the Teukolsky equation hold. For sl...

We compute the particle creation rate in the context of quantum fields in curved spacetimes by evaluating the imaginary part of the effective action up to second order in the curvatures. For arbitrary metrics in dimensions D ≥ 4 , we express the vacuum persistence amplitude in terms of the Ricci scalar and the Weyl tensor, showing that, up to their...

Tempe is a nutritious food that is popular with many people. The problem is that tempe has a short shelf life and must be consumed immediately. Instant tempe is one of the innovative tempe products with a longer shelf life. This research aims to analyze the shelf life of instant tempe in various packages and at different storage temperatures using...

El presente artículo ofrece un análisis crítico de la sentencia emitida por la Corte Suprema de Justicia de Colombia el 2 de octubre de 2024 (Rad. SP2701-2024), que aborda un caso de tentativa de feminicidio, en donde se examina cómo las decisiones judiciales que carecen de enfoque de género y rigor metodológico contribuyen a la invisibilización de...

This study evaluated two novel food thawing systems: vacuum sublimation-rehydration thawing (VSRT) and magnetic field-assisted thawing (MFT). Their effectiveness was assessed by comparing the quality characteristics of thawed potatoes with those obtained from conventional methods such as running water (RW), refrigeration thawing at 4 °C (RT), and a...

We derive the neutrino oscillation probability in vacuum using scattering theory methods developed earlier in the context of collider physics. It is computed from Feynman diagrams that combine neutrino production and detection processes into a single quantum amplitude. Initial-state particles in the neutrino source and the detector are treated as w...

This paper investigates the influence of time dilation on the entan-glement collapse of photons traveling at different speeds, specifically examining the relationship between photon speed and the timing of entanglement collapse. We hypothesize that photons traveling at the speed of light in a vacuum will undergo entanglement collapse slower than th...

We revisit the isospin-breaking corrections relating the e + e − hadronic cross section and the tau decay spectral function, focusing on the dipion channel, that gives the dominant contribution to the hadronic vacuum polarization piece of the muon g − 2 . We test different types of electromagnetic and weak form factors and show that both, the Gouna...

We establish the global well-posedness of classical solutions to the vacuum free boundary problem of the 1-D viscous Saint-Venant system with large data. Since the depth $\rho$ of the fluid vanishes on the moving boundary, the momentum equations become degenerate both in the time evolution and spatial dissipation, which may lead to singularities fo...

Stability of the ‘rigid’ ( $m = 1$ ) ballooning mode in a mirror axisymmetric trap is studied for the case of oblique neutral beam injection (NBI), which creates an anisotropic population of fast sloshing ions. Since small-scale modes with azimuthal numbers $m>1$ in long thin (paraxial) mirror traps are easily stabilized by finite-Larmor-radius (FL...

This study introduces a simple and effective way to control the bandgap of perovskite film by constructing bilayer film composed of methylammonium lead iodide (MAPbI3) and formamidinium lead iodide (FAPbI3) layers. The bilayer film is fabricated through the sequential co‐deposition of methylammonium iodide (MAI) and lead iodide (PbI2), followed by...

El ensayo refleja la experiencia personal del autor con ChatGPT, desde su descubrimiento en noviembre de 2022, justo después de la muerte de su madre. Inicialmente, ChatGPT sirvió como un refugio emocional, ayudando al autor a lidiar con la tristeza y el vacío. Con el tiempo, la herramienta se convirtió en una dependencia diaria, desplazando su cap...

In April 2025, I received a message from Dr. Essam Allou concerning a body of work titled Pure Time Theory, centered on a scalar field T_relax, which he describes as the fundamental ontological substrate for mass, gravity, causality, and coherence. Dr. Allou asserts that several elements within my published frameworks—specifically Multifaceted Cohe...

The final optic in future inertial fusion energy plants must maintain high performance and survivability under gigashot laser irradiation while exposed to fusion byproducts. Although no practical solution has been demonstrated, a self-healing final turning mirror based on a grazing-incidence liquid metal mirror has been theoretically explored. This...

Given a set of current-carrying filaments that create a magnetic field with rotating elliptical flux surfaces, we present verification calculations using the VMEC, DESC, and SPEC free-boundary magnetohydrostatic equilibrium codes for both the “vacuum” equilibrium, for which there is no plasma pressure and no plasma currents, and for a non-zero pres...

This paper considers the two-dimensional Cauchy problem of the full compressible Navier-Stokes equations with far-field vacuum in $\mathbb{R}^2$, where the viscosity and heat-conductivity coefficients depend on the absolute temperature $\theta$ in the form of $\theta^\nu$ with $\nu>0$. Due to the appearance of the vacuum, the momentum equation are...

Quantum computing gives direct access to the study of the real-time dynamics of quantum many-body systems. In principle, it is possible to directly calculate non-equal-time correlation functions, from which one can detect interesting phenomena, such as the presence of quantum scars or dynamical quantum phase transitions. In practice, these calculat...

This paper revisits the status of the graviton's mass and spin under emergent vacuum-based frameworks that transcend perturbative field theory. Drawing from the Multifaceted Coherence (MC) model and the Dodecahedron Linear String Field Hypothesis (DLSFH), we explore how graviton characteristics can emerge from coherence-structured vacuum geometry r...

Whether the smooth solution of the multi-dimensional viscous compressible fluids will blow up in finite time has always been a challenging problem. In the recent work [5], Merle et al. proved that there are smooth solutions to the 2D radially symmetric compressible Navier–Stokes equations which will inevitably form shell singularities in finite tim...

We discuss an interacting decaying vacuum energy and dark matter empowered by gravitationally induced matter creation model, and its impact on structure formation by analysing the growth rate perturbations. Our work is motivated by the possibility that the decaying vacuum is due to quantum field theory and dark matter originates from gravitationall...

«Il vuoto aurorale non indica una mancanza: non è un vuoto da riempire. Non è neppure il risultato di uno svuotamento che azzera tutto. Piuttosto è l'esito di un evento inaspettato: la conseguenza di un inciampo sullo scoglio dell'esistenza che ridimensiona tutte le aspettative, le aspirazioni, i bisogni, gli impegni e i ruoli che ruotano attorno a...

This paper investigates a reformulation of Einstein's mass-energy equivalence relation from E = mc 2 to Et 2 = md 2 , where c is replaced by the ratio of distance (d) to time (t). We explore the theoretical foundations of this approach and its implications for understanding vacuum particle-antiparticle pair creation. The squared terms suggest a fun...

En estudios realizados en educación inicial, es poco frecuente que los investigadores e investigadoras describan los dilemas metodológicos y éticos que enfrentan durante su trabajo, ni la forma en que perciben a los niños y niñas dentro de la investigación. Con este artículo pretendo iniciar una discusión que ayude a llenar este vacío, presentando...

Following the recent explosion of an Aurus Senat limousine near Moscow's FSB HQ (March 29, 2025), this analysis considers the hypothetical consequences should leaders like Putin or Xi be assassinated, particularly if linked to Ukraine or Taiwan. It argues such acts would likely backfire severely. Power vacuums could empower hardliners exploiting na...

The electrochemical corrosion of traction motor bearings is a critical issue in high-speed rail systems. The over-voltage caused by over-phase and on-board vacuum circuit breaker (VCB) opening and closing of the high-speed train will be spread to the traction motor through the coupling of the car body, bogie frame, etc.,. It makes the shaft end of...

Discover the 7 best penis extenders of 2025 in this detailed guide covering top-rated devices for size increase, curvature correction, and Peyronie’s disease. Learn how traction works, compare vacuum vs. rod-based systems, explore packages and user results, and choose the best extender for your goals.

A single crystal of YAl3(BO3)4 was grown using the top-seeded solution growth method. The vacuum ultraviolet (VUV) excitation spectrum, monitored at the emission wavelength of 312 and 372 nm, showed a narrow excitation band at around 162 nm, which is located near the absorption edge of the YAl3(BO3)4 host. Upon VUV excitation at 162 nm, the charact...

El urbanismo y el crecimiento poblacional generan cambios en el medio natural, convirtiendo a las universidades en lugares idóneos para el estudio de la biodiversidad. Sin embargo, se conoce poco de la flora y fauna en el Campus Universitario Rubén Darío de la Universidad Nacional Autónoma de Nicaragua, Managua. Este trabajo representa uno de los p...

We analyze existence and properties of solutions of two-dimensional general relativistic initial data sets with a negative cosmological constant, both on spacelike and characteristic surfaces. A new family of such vacuum spacelike data parameterised by poles at the conformal boundary at infinity is constructed. We review the notions of global Hamil...

The characteristics of the consolidation facilitated by prefabricated horizontal drains (PHDs) combined with vacuum loading, and the evolution of the soil column surrounding the PHDs, which significantly affects the acceleration efficiency, remain insufficiently understood. This study conducts experimental investigations into PHD-assisted consolida...