Conny Aerts, Timothy Van Reeth, Joey S. G. Mombarg
et al.
We combined Gaia DR3 and TESS photometric light curves to estimate the internal physical properties of 2,497 gravity-mode pulsators. We relied on asteroseismic properties of Kepler $γ\,$Dor and SPB stars to derive the near-core rotation frequency, $f_{\rm rot}$, of the Gaia-discovered pulsators from their dominant prograde dipole gravito-inertial pulsation mode. We offer a recipe based on linear regression to deduce $f_{\rm rot}$ from the dominant gravito-inertial mode frequency. It is applicable to prograde dipole modes with an amplitude above 4mmag and occurring in the sub-inertial regime. By applying it to the 2,497 pulsators, we have increased the sample of intermediate-mass dwarfs with such an asteroseismic observable by a factor of 4. We used the estimate of $f_{\rm rot}$ to deduce spin parameters between 2 and 6, while the sample's near-core rotation rates range from 0.7% to 25% of the critical Keplerian rate. We used $f_{\rm rot}$, along with the Gaia effective temperature and luminosity to deduce the (convective core) mass, radius, and evolutionary stage from grid modelling based on rotating stellar models. We derived a decline of $f_{\rm rot}$ with a factor of 2 during the main-sequence evolution for this population of field stars, which covers a mass range from 1.3M$_\odot$ to 7M$_\odot$. We found observational evidence for an increase in the radial order of excited gravity modes as the stars evolve. For 969 pulsators, we derived an upper limit of the radial differential rotation between the convective core boundary and the surface from Gaia's vbroad measurement and found values up to 5.4. Our recipe for the near-core rotation frequency from the dominant gravito-inertial mode detected in the independent Gaia and TESS light curves is easy to use, facilitates applications to large samples, and allows to map their angular momentum and evolutionary stage in the Milky Way.
Paúl Esteban Barbecho-Asmal, Juan Carlos Calderón-Peñafiel
El confort térmico e higrotérmico influye en la salud y calidad de vida rural en Cuenca, donde viviendas precarias autoconstruidas carecen de aislamiento, ventilación y materiales adecuados, lo que agrava problemas sociales, ambientales y energéticos por condiciones climáticas adversas y limitaciones económicas. Este artículo de investigación tiene el objetivo de examinar el nivel de confort térmico e higrotérmico presente en el interior de las viviendas rurales localizadas en las parroquias El Valle y Paccha, pertenecientes al cantón Cuenca. Para ello, se consideran variables relacionadas con la temperatura ambiental, la humedad relativa, la circulación del aire, así como los materiales empleados y los sistemas constructivos predominantes. La investigación adopta un enfoque metodológico de carácter mixto, que combina la recolección de información numérica mediante mediciones físicas con la obtención de percepciones cualitativas a través de entrevistas realizadas a los habitantes. Los hallazgos alcanzados hacen posible valorar las condiciones actuales de habitabilidad y, a su vez, plantear directrices y alternativas orientadas a optimizar el confort térmico e higrotérmico en los espacios habitacionales estudiados.
This paper introduces a novel method for predicting tool wear in CNC turning operations, combining ultrasonic microphone arrays and convolutional neural networks (CNNs). High-frequency acoustic emissions between 0 kHz and 60 kHz are enhanced using beamforming techniques to improve the signal- to-noise ratio. The processed acoustic data is then analyzed by a CNN, which predicts the Remaining Useful Life (RUL) of cutting tools. Trained on data from 350 workpieces machined with a single carbide insert, the model can accurately predict the RUL of the carbide insert. Our results demonstrate the potential gained by integrating advanced ultrasonic sensors with deep learning for accurate predictive maintenance tasks in CNC machining.
Diederik Aerts, Massimiliano Sassoli de Bianchi, Sandro Sozzo
The conceptuality interpretation of quantum mechanics proposes that quantum entities have a conceptual nature, interacting with the material world through processes that are the physical counterpart of the meaning-based processes which typically occur in human cognition. This interpretation emerged from the early developments in quantum cognition, a field that uses quantum mathematics to model human cognitive activity. It benefited from the specific approach taken by the Brussels research group, modeling concepts themselves as quantum entities and minds as measuring apparatuses. The article sketches the essential steps of the intellectual journey going from the first applications of quantum notions and formalisms to human cognition to the proposal of a potentially groundbreaking interpretation of quantum mechanics, offering profound explanations for major quantum phenomena. This was done by drawing numerous parallels with the human conceptual domain and suggesting the existence of a level of cognitive activity that would underlie our physical reality. This means that an increased cross-fertilization between the conceptuality interpretation and quantum cognition is to be expected in the future, both of which are synergistic in furthering our understanding of the nature of reality. This is the first part of a two-part article. In the second part, which can be read independently of the first, the successes of the interpretation will be described in a more systematic way, providing a brief overview of what has been achieved so far.
Entrevista com Eduardo Moreira e Inês Peixoto, atores do Grupo Galpão, sobre o processo de realização de Moscou (Eduardo Coutinho, 2008), no qual Coutinho filma fragmentos de ensaios de As três irmãs, de Tchékhov, com os atores do grupo, sob direção teatral de Enrique Diaz. A abertura do processo, o papel de Eduardo Coutinho em sua condução, os jogos cênicos e workshops (pensados como um “subtexto” dos atores), e a entrada de Tchékhov no repertório do Galpão são alguns dos temas abordados.
We consider a simple string model to explain and partly demystify the phenomenon of quantum entanglement. The model in question has nothing to do with string theory: it uses macroscopic strings that can be acted upon by Alice and Bob in ways that violate, or fail to violate, in different ways Bell-CHSH inequalities and the no-signaling conditions, also called marginal laws. We present several variants of the model, to address different objections that may arise. This allows us to make fully visible what the quantum formalism already suggests, about the nature of the correlations associated with entangled states, which appear to be created in a contextual manner at each execution of a joint measurement. We also briefly present the hidden measurement interpretation, whose rationale is compatible with the mechanism suggested by our string model, then offer some final thoughts about the possibility that the quantum entanglement phenomenon might affect not only states, but also measurements, and that our physical reality would be predominantly non-spatial in nature.
Of the major modernist movements in the 20th century, Abstract Expressionism long retained its canonical status as a radical avant-garde detached from a broader mass culture [...]
The magnetic field dependent critical current $I_{\text{c}}(B)$ of a Josephson junction is determined by the screening currents in its electrodes. In macroscopic junctions, a local vector potential drives the currents, however, in thin film planar junctions, with electrodes of finite size and various shapes, they are governed by non-local electrodynamics. This complicates the extraction of parameters such as the geometry of the effective junction area, the effective junction length and, the critical current density distribution from the $I_{\text{c}}(B)$ interference patterns. Here we provide a method to tackle this problem by simulating the phase differences that drive the shielding currents and use those to find $I_{\text{c}}(B)$. To this end, we extend the technique proposed by John Clem [Phys. Rev. B, \textbf{81}, 144515 (2010)] to find $I_{\text{c}}(B)$ for Josephson junctions separating a superconducting strip of length $L$ and width $W$ with rectangular, ellipsoid and rhomboid geometries. We find the periodicity of the interference pattern ($ΔB$) to have geometry independent limits for $L \gg W$ and $L \ll W$. By fabricating elliptically shaped S$-$N$-$S junctions with various aspect ratios, we experimentally verify the $L/W$ dependence of $ΔB$. Finally, we incorporate these results to correctly extract the distribution of critical currents in the junction by the Fourier analysis of $I_{\text{c}}(B)$, which makes these results essential for the correct analysis of topological channels in thin film planar Josephson junctions.
La representación del tiempo en géneros narrativos de imagen en movimiento puede construirse en la implementación de recursos compositivos legados por la pintura. Aunque estrictamente como seres humanos no podemos reproducir el tiempo; a partir de desafíos creativos se descubrió la posibilidad de superar los límites. Para entender el logro, este texto parte de una revisión del concepto de representación con el objetivo de explicarlo en relación con el tiempo en la pintura, a partir de medios específicos vigentes en prácticas visuales contemporáneas aportados por artistas de antaño; desde una perspectiva semiótica del arte, a través de creativos que incursionan en la práctica actual del fotolibro. Luego se analizan dichos recursos extrapolados en ejemplos particulares de los géneros del video, el cine, la historieta, entre otros, para observar la eficacia narrativa y el efecto estético que producen dichos modos pictóricos al aplicarse en otros formatos de este tipo de imagen.
Abstract The field of art education has been impacted by the COVID-19 pandemic in complex ways. Art educators have been challenged with teaching visual arts skills, practices, and concepts, to students in virtual classrooms using non-conventional means. Their principal goal has been to provide quality education in the visual arts for all students. They recognize that having a visual arts education impacts the quality of life of everyone and their ability to understand and communicate in our complex world. In their efforts to provide meaningful and effective education, art educators have had to manage new instructional delivery systems and to ensure the health and safety and social emotional learning of their students and themselves in their educational spaces. They responded by using social media, video conferencing, and other digital technology to deliver instruction. The National Art Education Association provided a wealth of digital resources to support virtual instruction during this time. These resources enabled art educators to successfully address the educational needs of their students. The long-term impact of the pandemic will require research to understand the nature of the impact of the pandemic on education and how educational policy needs to be adjusted to reflect the new post-pandemic educational landscape
The state of the art review broadly oversees the use of novel research utilized in the creation of virtual environments applied in interactive art experiences, with a specific focus on the application of procedural animation in spatially augmented reality (SAR) exhibitions. These art exhibitions frequently combine sensory displays that appeal, replace, and augment the visual, auditory and touch or haptic senses. We analyze and break down art-technology related innovations in the last three years, and thoroughly identify the most recent and vibrant applications of interactive art experiences in the review of numerous installation applications, studies, and events. Display mediums such as virtual reality, augmented reality, mixed reality, and robotics are overviewed in the context of art experiences such as visual art museums, park or historic site tours, live concerts, and theatre. We explore research and extrapolate how recent innovations can lead to different applications that will be seen in the future.
The Anomalous Hall Effect (AHE) is an important quantity in determining the properties and understanding the behavior of the two-dimensional electron system forming at the interface of SrTiO3-based oxide heterostructures. The occurrence of AHE is often interpreted as a signature of ferromagnetism, but it is becoming more and more clear that also paramagnets may contribute to AHE. We studied the influence of magnetic ions by measuring intermixed LaAlO3/GdTiO3/SrTiO3 at temperatures below 10 K. We find that, as function of gate voltage, the system undergoes a Lifshitz transition, while at the same time an onset of AHE is observed. However, we do not observe clear signs of ferromagnetism. We argue the AHE to be due to the change in Rashba spin-orbit coupling at the Lifshitz transition and conclude that also paramagnetic moments which are easily polarizable at low temperatures and high magnetic filds lead to the presence of AHE, which needs to be taken into account when extracting carrier densities and mobilities.
Iacopo Bertelli, Joris J. Carmiggelt, Tao Yu
et al.
Spin waves - the elementary excitations of magnetic materials - are prime candidate signal carriers for low dissipation information processing. Being able to image coherent spin-wave transport is crucial for developing interference-based spin-wave devices. We introduce a platform for probing coherent spin waves based on magnetic resonance imaging with electron spins in diamond. Focusing on a thin-film magnetic insulator, we quantify spin-wave amplitudes, visualize the dispersion, and demonstrate time-domain measurements of spin-wave packets. We use our platform to study spin-wave interference, revealing uni-directional, autofocused spin-wave patterns with frequency-controlled numerical apertures. A theoretical analysis explains the patterns in terms of chiral spin-wave excitation and stray-field coupling to the sensor spins. These results pave the way for probing spin waves in atomically thin magnets, even when embedded between opaque materials.
Ninetta Leone, Simone Parisotto, Kasia Targonska-Hadzibabic
et al.
Our interdisciplinary team Mathematics for Applications in Cultural Heritage (MACH) aims to use mathematical research for the benefit of the arts and humanities. Our ultimate goal is to create user-friendly software toolkits for artists, art conservators and archaeologists. In order for their underlying mathematical engines and functionality to be optimised for the needs of the end users, we pursue an iterative approach based on a continuous communication between the mathematicians and the cultural-heritage members of our team. Our paper illustrates how maths can speak art, but only if first art speaks maths.
Ricardo Jimeno Aranda, José Antonio Jiménez de las Heras
El artículo se centra en la última etapa del cine del director franco-griego Costa-Gavras, referente principal del cine político contemporáneo, en la que aborda las fracturas de una Europa posmoderna desde múltiples ángulos. Gavras traza un recorrido que va desde los estragos del desempleo y de la competencia empresarial en Arcadia (Le couperet, 2005), la realidad de la inmigración ilegal en Edén al Oeste (Éden à l’Ouest, 2009), el funcionamiento especulativo de la economía en El capital (Le capital, 2012), y el engranaje institucional de la Unión Europea en Comportarse como adultos (Adults in the Room, 2019). El texto se centra en analizar como este grupo de filmes ofrecen, a partir de su construcción narrativa y discursiva, una visión de la deriva europea contemporánea en un sentido dual, entre realidad y utopía, a partir de un tono de realismo mágico, que se convierte en la metáfora de la de la crisis de valores de la Unión Europea.
Seni jalanan bagi Bonek adalah media perlawanan kepada federasi sepak bola Indonesia, Persatuan Sepakbola Seluruh Indonesia (PSSI). Mereka menggunakan seni jalanan bukan hanya sebagai media berekspresi melainkan juga menjadi media identitas sebagai suporter Persebaya. Perlakuan PSSI yang dianggap tidak berkeadilan menjadikan Bonek membuat gerakan budaya berupa protes melalui seni jalanan, dalam hal ini spanduk. Seni jalanan sendiri pada sejarahnya adalah media liar yang dipakai di ruang-ruang publik untuk menyatakan keseniannya maupun sebagai media berekspresi yang bagi seniman dibatasi hanya di galeri-galeri. Publik bagi seniman juga adalah ruang bagi masyarakat bebas menikmati karya seni. Hal ini pula yang mendasari Bonek memakai seni jalanan (spanduk) karena di samping efektif dalam menyampaikan pesan tetapi seni jalanan juga dipandang sebagai media tanpa sekat (egaliter) sebagaimana identitas Bonek selama ini. Pendekatan dalam penelitian ini menggunakan perspektif dalam kajian budaya terutama kaitannya dengan budaya visual. Identifikasi diri yang terdapat dalam komunitas Bonek memunculkan identitas suporter sepak bola yang membedakannya dengan komunitas suporter sepak bola lain. Elemen-elemen visual maupun pesan yang disampaikan dalam spanduk menarik untuk diteliti untuk mendapatkan bagaimana identitas dipahami oleh Bonek dalam mendukung klub pujaannya, Persebaya.
Tânia Baier, Marko Alexandre Lisboa dos Santos, Keila Tyciana Peixer
et al.
Este artigo apresenta e descreve algumas das atividades que foram realizadas em um projeto de extensão universitária desenvolvido na cidade de Blumenau/SC, no ano de 2019. O projeto foi aplicado em quatro escolas estaduais com alunos do Ensino Fundamental e Médio. A temática do projeto envolve a abordagem da geometria em obras arquitetônicas e artefatos de design apresentados por meio de painéis expostos nas escolas e de jogos interativos, situação em que foi possível reconhecer as formas geométricas estudadas nas aulas de matemática, tais quais: prismas, cubos, cilindros entre outros. Por meio das mostras, também foi possível observar obras arquitetônicas contemporâneas assim como objetos icônicos do design que despertaram nos alunos conexões entre as formas e a linha do tempo do desenvolvimento destas produções.