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Journal articles on the topic 'Cosmic Boundaries'

Author: Grafiati

Published: 7 June 2025

Last updated: 17 July 2025

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1

GARCIA DE ANDRADE, L. C. "NON-RIEMANNIAN COSMIC WALLS AS BOUNDARIES OF SPINNING MATTER WITH TORSION." Modern Physics Letters A 13, no. 15 (1998): 1179–84. http://dx.doi.org/10.1142/s021773239800125x.

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An example of a plane topological defect solution of linearized Einstein–Cartan (EC) field equation representing a cosmic wall boundary of spinning matter is given. The source of Cartan torsion is composed of two orthogonal lines of static polarized spins bounded by the cosmic plane wall. The Kopczyński–Obukhov–Tresguerres (KOT) spin fluid stress–energy current coincides with thin planar matter current in the static case. Our solution is similar to the Letelier solution of Einstein equation for multiple cosmic strings. Due to this fact we suggest that the lines of spinning matter could be anal

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Abulof, Uriel, and Shirley Le Penne. "Cosmic Political Theory." Political Theory 51, no. 1 (2023): 6–17. http://dx.doi.org/10.1177/00905917221127644.

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Modern political thought arrived on the heels of two revolutionary realizations: We are not at the center of the universe (Copernicus), which was not created for us (Darwin). How might political theory respond to a third revolutionary realization, that we are not alone, that other creatures, sentient and highly intelligent, share our vast universe? We explore answers through a dialogue between two political theorists, a human and an alien. Rather than superimposing astropolitics upon anthropolitics, we use the encounter to ask new questions, e.g., should PT foster bridges between humans and al

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Desiati, P., and A. Lazarian. "ANISOTROPY OF TeV COSMIC RAYS AND OUTER HELIOSPHERIC BOUNDARIES." Astrophysical Journal 762, no. 1 (2012): 44. http://dx.doi.org/10.1088/0004-637x/762/1/44.

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Cautun, Marius, Rien van de Weygaert, Bernard J. T. Jones, and Carlos S. Frenk. "Understanding the cosmic web." Proceedings of the International Astronomical Union 11, S308 (2014): 47–56. http://dx.doi.org/10.1017/s1743921316009613.

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AbstractWe investigate the characteristics and the time evolution of the cosmic web from redshift, z=2, to present time, within the framework of the \nexus{} algorithm. This necessitates the introduction of new analysis tools optimally suited to describe the very intricate and hierarchical pattern that is the cosmic web. In particular, we characterising filaments (walls) in terms of their linear (surface) mass density, which is very good in capturing the evolution of these structures. At early times the cosmos is dominated by tenuous filaments and sheets, which, during subsequent evolution, me

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Rozin, Vadim M. "Interaction and Boundaries of Social, Biological and Cosmic Types of Reality." Voprosy Filosofii, no. 2 (2022): 94–105. http://dx.doi.org/10.21146/0042-8744-2022-2-94-105.

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The article examines three main types of realities (social, biological and cosmic), which came into interaction at the planetary level, giving rise to negative consequences (environmental crisis, pandemic, etc.). The author raises the question of the reasons, pointing to two main ones. The first is the understanding of nature, the concept of which allows you to describe scientifically only one type of reality (cosmic); life and social relations were then reduced to this reality. The second reason is the design nature of the mind and culture of modernity, provoking not only the complication

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Chen, Runtong. "Exploring the cosmic nexus: Black holes, gravitational waves, and the dance of the universe." Theoretical and Natural Science 30, no. 1 (2024): 6–13. http://dx.doi.org/10.54254/2753-8818/30/20240792.

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In the vast cosmos, the enigmatic interplay of black holes and gravitational waves unfolds as a mesmerizing narrative, offering profound insights into the universes deepest mysteries. This paper delves into the intricate relationship between these cosmic phenomena, exploring their formation, properties, and their transformative implications in the realm of astrophysics. As colossal black holes merge, they generate gravitational waves that carry signatures of their masses, spins, and orientations. These waves, harnessed through advanced detectors like LIGO and Virgo, present a new dimension of

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Auclair, Pierre, Simone Blasi, Vedran Brdar, and Kai Schmitz. "Gravitational waves from current-carrying cosmic strings." Journal of Cosmology and Astroparticle Physics 2023, no. 04 (2023): 009. http://dx.doi.org/10.1088/1475-7516/2023/04/009.

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Abstract Cosmic strings are predicted by many Standard Model extensions involving the cosmological breaking of a symmetry with nontrivial first homotopy group and represent a potential source of primordial gravitational waves (GWs). Present efforts to model the GW signal from cosmic strings are often based on minimal models, such as, e.g., the Nambu-Goto action that describes cosmic strings as exactly one-dimensional objects without any internal structure. In order to arrive at more realistic predictions, it is therefore necessary to consider nonminimal models that make an attempt at accountin

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Laštovička, Jan, and L. Křivský. "Influence of the IMF sector boundaries on cosmic rays and tropospheric vorticity." Studia Geophysica et Geodaetica 31, no. 2 (1987): 213–18. http://dx.doi.org/10.1007/bf01638205.

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Reichherzer, P., J. Becker Tjus, E. G. Zweibel, L. Merten, and M. J. Pueschel. "Turbulence-level dependence of cosmic ray parallel diffusion." Monthly Notices of the Royal Astronomical Society 498, no. 4 (2020): 5051–64. http://dx.doi.org/10.1093/mnras/staa2533.

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ABSTRACT Understanding the transport of energetic cosmic rays belongs to the most challenging topics in astrophysics. Diffusion due to scattering by electromagnetic fluctuations is a key process in cosmic ray transport. The transition from a ballistic to a diffusive-propagation regime is presented in direct numerical calculations of diffusion coefficients for homogeneous magnetic field lines subject to turbulent perturbations. Simulation results are compared with theoretical derivations of the parallel diffusion coefficient’s dependences on the energy and the fluctuation amplitudes in the limi

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Litvinenko, Yuri E., Frederic Effenberger, and Reinhard Schlickeiser. "THE TELEGRAPH APPROXIMATION FOR FOCUSED COSMIC-RAY TRANSPORT IN THE PRESENCE OF BOUNDARIES." Astrophysical Journal 806, no. 2 (2015): 217. http://dx.doi.org/10.1088/0004-637x/806/2/217.

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11

Solis Nicot, Yves Bernardo Roger. "Mexico and Paradox of Boundaries." MEΘEXIS Journal of Research in Values and Spirituality II, no. I (2022): 37–54. https://doi.org/10.71210/mjrvs.2.a.3.

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As a sovereign country, the Federation of the United Mexican States was born 200 years ago. With a history under the sign of national pride, Mexico is a true example of interculturality, but at the same time of xenophobia. One of the key elements in understanding contemporary Mexico resides in the idea of Mestizaje (the Spanish term for ‘miscegenation’) as expressed by philosopher José Vasconcelos. Almost 100 years after the first publication of his book The Cosmic Race, many of its topics still require more accurate and thorough research. In dealing with such a complex subject, one needs to t

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Grigoryan, A. Kh, A. R. Mkrtchyan, and A. A. Saharian. "Fermionic condensate and the Casimir effect in cosmic string spacetime." International Journal of Modern Physics D 26, no. 07 (2017): 1750064. http://dx.doi.org/10.1142/s021827181750064x.

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We investigate combined effects of nontrivial topology, induced by a cosmic string, and boundaries on the fermionic condensate and the vacuum expectation value (VEV) of the energy–momentum tensor for a massive fermionic field. As geometry of boundaries we consider two plates perpendicular to the string axis on which the field is constrained by the MIT bag boundary condition. By using the Abel–Plana type summation formula, the VEVs in the region between the plates are decomposed into the boundary-free and boundary-induced contributions for general case of the planar angle deficit. The boundary-

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Lima, Paulo Alexandre. "MONSTROUS EMOTIONS IN SENECA'S MEDEA." Greece and Rome 68, no. 1 (2021): 76–96. http://dx.doi.org/10.1017/s001738352000025x.

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This article explores the phenomenon of the monstrous in Seneca's Medea by focusing on the emotions of its main character, in particular demonstrating that they are not merely an expression of Medea's inner psychological sphere but are intrinsically connected with her existential search for recognition in her surrounding world, a world especially marked by its social, cosmic, and mythical dimensions. The monstrous nature of Medea's emotions should be understood in the light of the wider phenomenon of the monstrous in this play, where it is a pervasive phenomenon, in the sense that it transcend

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Levison, John R., and Priscilla Pope-Levison. "Toward an Ecumenical Christology for Asia." Missiology: An International Review 22, no. 1 (1994): 3–17. http://dx.doi.org/10.1177/009182969402200101.

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Asian theologians recognize that Asian theology must address two pressing issues: poverty and religiosity. Most Asian Christologies tend to address one to the exclusion of the other: the Cosmic Christ embraces religiosity: Jesus Christ Liberator confronts poverty: Jesus as pain-love of God comforts the suffering. The Christologies of M. M. Thomas and Aloysius Pieris, in contrast, address both poverty and religiosity in Asia. In both Christologies Christ's presence extends to Asia's struggle for a new society which takes place beyond the church's boundaries. This similarity is not due, however,

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Russo, Pedro, Mariana Barrosa, and Lars Lindberg Christensen. "Brief Status Report on the International Year of Astronomy 2009." Communicating Astronomy with the Public 2, no. 3 (2008): 24. https://doi.org/10.5281/zenodo.14862966.

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The International Year of Astronomy 2009 (IYA2009) is a global collaboration between nations and organisations for peaceful purposes – the search for our cosmic origin, a common heritage that connects everyone. The science of astronomy represents millennia of collaborations across all boundaries: geographic, gender, age, culture and race, in accordance with the principles of the UN Charter. This report outlines the status of the principal projects and activities that make up the Year.

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Oliveira dos Santos, Wagner, Herondy F. Santana Mota, and Eugênio R. Bezerra de Mello. "Current Density Induced by a Cosmic String in de Sitter Spacetime in the Presence of Two Flat Boundaries." Universe 10, no. 11 (2024): 428. http://dx.doi.org/10.3390/universe10110428.

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In this paper, we investigate the vacuum bosonic current density induced by a carrying-magnetic-flux cosmic string in a (D+1)-de Sitter spacetime considering the presence of two flat boundaries perpendicular to it. In this setup, the Robin boundary conditions are imposed on the scalar charged quantum field on the boundaries. The particular cases of Dirichlet and Neumann boundary conditions are studied separately. Due to the coupling of the quantum scalar field with the classical gauge field, corresponding to a magnetic flux running along the string’s core, a nonzero vacuum expectation value fo

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Perico, Eder L. D., Rodrigo Voivodic, Marcos Lima, and David F. Mota. "Cosmic voids in modified gravity scenarios." Astronomy & Astrophysics 632 (November 27, 2019): A52. http://dx.doi.org/10.1051/0004-6361/201935949.

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Modified gravity (MG) theories aim to reproduce the observed acceleration of the Universe by reducing the dark sector while simultaneously recovering General Relativity (GR) within dense environments. Void studies appear to be a suitable scenario to search for imprints of alternative gravity models on cosmological scales. Voids cover an interesting range of density scales where screening mechanisms fade out, which reaches from a density contrast δ ≈ −1 close to their centers to δ ≈ 0 close to their boundaries. We present an analysis of the level of distinction between GR and two modified gravi

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Ostrowski, M., and R. Schlickeiser. "Cosmic-ray diffusive acceleration at shock waves with finite upstream and downstream escape boundaries." Solar Physics 167, no. 1-2 (1996): 381–94. http://dx.doi.org/10.1007/bf00146347.

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Yamakoshi, Kazuo, Ken’ichi Nogami, Rie Omori, Ma Jianguo, and Ma Shulan. "A Cosmic Matter Accretion Event Around 660,000 Years Before Present Found in Two Dated, Central Pacific Cores." International Astronomical Union Colloquium 126 (1991): 53–56. http://dx.doi.org/10.1017/s0252921100066471.

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AbstractIn order to study large-scaled cosmic matter accretion events in the past, Ir enriched layers at C-T and other geological boundaries and dated sedimental cores have been searched by many scientists. In this work, Iridium contents and the ratios of (Co/Fe) in two dated, respective layers of the cores are determined. These samples were dated fortunately with the paleomagnetic and also with the cosmogenic Be-10 methods. Ir enrichments are found at (0.660 ± 0.030) My before present.

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20

Parappally, Jacob. "The New Age Spirituality: A Quest to Break Boundaries." Jnanadeepa: Pune Journal of Religious Studies July-Dec 2004, Vol 7/2 (2004): 58–72. https://doi.org/10.5281/zenodo.4288508.

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The author tries to describe what the New Age spirituality is, how it originated and developed and how it is a challenge to organized religions. The popular appeal o f  New Age Spirituality can be attributed to its serious attempts to respond to the human longing for harmony, belongingness, communion and freedom from religious and  socio-cultural prohibitions leading to spiritual, psychological and  physical well-being. The New Age spirituality has the grand vision of a global village but its followers are not committed to its birthing on the foundation of  universal values

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Ahmadov, T. "THE ROLE OF COSMIC DUST IN THE FORMATION OF STRONG REFLECTIVE BOUNDARIES (ON THE EXAMPLE OF INDIVIDUAL AREAS OF AZERBAIJAN)." National Association of Scientists 2, no. 75 (2022): 06–11. http://dx.doi.org/10.31618/nas.2413-5291.2022.2.75.558.

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The paper underlines that reserves in anticline traps are exhausting both in Azerbaijan and around the globe and in this respect the priority today is exploration for hydrocarbon resources in non-anticline traps, which are formed with a certain role of non-depositions or in other words - breaks in sedimentation process. In this respect, it is natural that in the recent years the geoscientists pay a close attention to researches on non-anticline traps and non-depositions, since they were not covered by specific studies until now. It should be noted, that studies held at the “Geophysics” Departm

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Maffei, Bruno, Paolo De Bernardis, Nabila Aghanim, and Samantha Stever. "The first detection of the CMB that opened a new field in cosmology." Photoniques, no. 116 (2022): 38–41. http://dx.doi.org/10.1051/photon/202211638.

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The Cosmic Microwave Background, the oldest signal that can be seen in the sky, is the direct proof that our Universe was extremely dense and hot several billion years ago. The first experimental detection of this fossil radiation has been performed in 1964 and has since then become a powerful tool to probe the formation and evolution of the Universe. Observations of this extremely faint signal pushes the boundaries of many technological developments notably in the fields of optics, detection and cryogenics for space applications.

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Ochieng, Ahaya L. "Islam and Terrorism: The Blurred Boundary Between the Cosmic and this World." Strathmore Law Journal 2, no. 1 (2021): 1–20. http://dx.doi.org/10.52907/slj.v2i1.55.

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Today the barbarity of crimes in the name of religion is all the more disturbing particularly when one considers the righteous religious language in which such heinous acts are cloaked. Violence perpetrated in the name of God continues to engage the world at alarming levels. It is in this regard that this study examines the general relationship between violence and religion in the specific context of Islam from the point of view of the cosmic war theory as advanced by Mark Juergensmeyer. The study observes that violent activities related to Islam are a result of the blurring of boundaries betw

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Nickeler, D. H., T. Wiegelmann, M. Karlický, and M. Kraus. "MHD flows at astropauses and in astrotails." ASTRA Proceedings 1 (September 5, 2014): 51–60. http://dx.doi.org/10.5194/ap-1-51-2014.

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Abstract. The geometrical shapes and the physical properties of stellar wind – interstellar medium interaction regions form an important stage for studying stellar winds and their embedded magnetic fields as well as cosmic ray modulation. Our goal is to provide a proper representation and classification of counter-flow configurations and counter-flow interfaces in the frame of fluid theory. In addition we calculate flows and large-scale electromagnetic fields based on which the large-scale dynamics and its role as possible background for particle acceleration, e.g., in the form of anomalous co

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Kolesnyk, Yu L., and B. A. Shakhov. "Galactic cosmic ray distribution in the simplest model of termination shock near the heliospheric boundaries." Kinematics and Physics of Celestial Bodies 25, no. 4 (2009): 213–19. http://dx.doi.org/10.3103/s0884591309040072.

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De Trafford, Aloisia. "The Palace Façade Motif and the Pyramid Texts as Cosmic Boundaries in Unis's Pyramid Chambers." Cambridge Archaeological Journal 17, no. 3 (2007): 271–83. http://dx.doi.org/10.1017/s0959774307000364.

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The focus of this article is the pyramid belonging to king Unis, last king of the 5th Dynasty. The striking feature of this pyramid is its ornate internal decoration with spells/utterances from the Pyramid Texts, and with the palace façade motif around the king's sarcophagus. The Pyramid Texts, one of the oldest examples of religious literature in the world, appear here for the first time. To date, research has generally focused on the language and content of the Pyramid Texts. This article looks beyond the subject matter of the Pyramid Texts to explore how these early hieroglyphic writings ha

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Barash, M. S. "Changes in the geomagnetic field and the evolution of marine biota." Океанология 59, no. 2 (2019): 257–64. http://dx.doi.org/10.31857/s0030-1574592257-264.

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The ideas about the influence of the geomagnetic field on evolution and biodiversity are controversial. The quantitative distribution of datum levels of oceanic microplankton during the last 2.0 million years shows a correlation with geomagnetic inversions. Lowering of the field intensity increases cosmic irradiation of the Earth's surface, which can activate mutagenesis leading to new species emergence. Moreover, since the correlation of the geomagnetic field intensity with the composition of the atmosphere, temperature, climate, volcanism and other environmental conditions is revealed, it is

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Lee, Chang, Xiaoyue LiJ, Derek Strom, and Olaf Reimann. "MADMAX: a QCD dark matter axion direct-detection experiment." Journal of Physics: Conference Series 2156, no. 1 (2021): 012041. http://dx.doi.org/10.1088/1742-6596/2156/1/012041.

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Abstract Peccei and Quinn proposed axions to solve the strong CP problem. Axions later turned out to be an excellent candidate for cold dark matter. They may have a mass of around 100 μeV if generated after cosmic inflation. The MADMAX collaboration aims to detect post-inflationary QCD axion using a new detector concept, the dielectric haloscope. It detects axion-induced traveling waves from boundaries of different media, boosted by layers of dielectrics. We report the current progress and future measurement plan for a proof-of-principle setup. We also report the current development of the pro

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Tito, Elizabeth P., and Vadim I. Pavlov. "Dynamics of Vortex Structures: From Planets to Black Hole Accretion Disks." Dynamics 4, no. 2 (2024): 357–93. http://dx.doi.org/10.3390/dynamics4020021.

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Thermo-vortices (bright spots, blobs, swirls) in cosmic fluids (planetary atmospheres, or even black hole accretion disks) are sometimes observed as clustered into quasi-symmetrical quasi-stationary groups but conceptualized in models as autonomous items. We demonstrate—using the (analytical) Sharp Boundaries Evolution Method and a generic model of a thermo-vorticial field in a rotating “thin” fluid layer in a spacetime that may be curved or flat—that these thermo-vortices may be not independent but represent interlinked parts of a single, coherent, multi-petal macro-structure. This alternativ

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Zacharias, Steffen, and Martin Schrön. "From Space to Soil: Revealing Environmental Water with Cosmic-Ray Neutron Sensing." ARPHA Conference Abstracts 8 (May 28, 2025): e148049. https://doi.org/10.3897/aca.8.e148049.

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The Cosmic-ray neutron sensing (CRNS) technique is a modern technological solution that facilitates continuous measurement of the average water content in the environment, including soil, snow, and vegetation. The sensor monitors an area of 10 to 15 hectares and soil depths up to 50 centimeters. This configuration enables the non-invasive and field-scale measurement of the soil water content or snow water equivalent that is insensitive to small-scale heterogeneities. The method has the potential to serve as an alternative to conventional in-situ sensors or costly soil or snow samples, while al

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Malavasi, Nicola, Nabila Aghanim, Marian Douspis, Hideki Tanimura, and Victor Bonjean. "Characterising filaments in the SDSS volume from the galaxy distribution." Astronomy & Astrophysics 642 (September 30, 2020): A19. http://dx.doi.org/10.1051/0004-6361/202037647.

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Detecting the large-scale structure of the Universe based on the galaxy distribution and characterising its components is of fundamental importance in astrophysics but is also a difficult task to achieve. Wide-area spectroscopic redshift surveys are required to accurately measure galaxy positions in space that also need to cover large areas of the sky. It is also difficult to create algorithms that can extract cosmic web structures (e.g. filaments). Moreover, these detections will be affected by systematic uncertainties that stem from the characteristics of the survey used (e.g. its completene

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Hutchings, Stephen C. "Making Sense of the Sensual in Pavel Florenskii's Aesthetics: The Dialectics of Finite Being." Slavic Review 58, no. 1 (1999): 96–116. http://dx.doi.org/10.2307/2672991.

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A boundary is not that at which something stops, but…that from which something begins its presencing.—Martin Heidegger,Poetry, Language, ThoughtPersonhood is a living contradiction—between private and social, form and content, finite and infinite, freedom and fate. Personhood would be lost if the boundaries and the forms that contain it were to disappear, if it were to dissolve into cosmic infinity. But personhood would not be the image and likeness of God if it did not accommodate within itself infinite content.—Nikolai Berdiaev,Filosofiia svobodnogo dukhaThe aesthetic…is the first stirrings

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Mourad, Anna-Latifa. "A Transforming Ontology of Boundaries? What Is and What Is Not in the Early Middle Kingdom." Journal of Egyptian Archaeology 110, no. 1-2 (2024): 237–52. https://doi.org/10.1177/03075133241280649.

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Ancient Egyptian ontologies have been commonly approached as related to order and chaos. Associated with the latter are the concepts of existence and non-existence, which may be expressed by the verb wn ‘to be’ and its derivatives, as well as the substantive n.tyt ‘what is’ and its negation iw.tyt ‘what is not’. The earliest attestations of n.tyt and iw.tyt are found in the Pyramid Texts, reflecting the importance of (non)existence in cosmic and funerary beliefs. By the Middle Kingdom, n.tyt and iw.tyt occur in titles and epithets of officials, some of whom were involved in boundary formation

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Warren, Sarah. "Neither “True Being” nor “Cosmic Pyrotechnics”: Dewey’s Naturalistic Metaphysics as Environmental Pedagogy Aid." Philosophical Inquiry in Education 31, no. 2 (2024): 168–79. https://doi.org/10.7202/1115461ar.

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Drawing primarily on John Dewey’s Experience and Nature, but putting his metaphysical commitments into conversation with pedagogical experience, this article asks: how might a Deweyan understanding of nature and our experience within it support environmental progress? More specifically, how might we respect pluralistic relationships with philosophy in the classroom while simultaneously cultivating an understanding of experience that clarifies the embodied nature of our meaning-making within it and the contextual urgencies of today? How might observing the “generic traits of existence” and thei

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Vukmanović, Ana. "PTICE U PROSTORNIM I VREMENSKIM MODELIMA USMENE LIRIKE." Nasledje Kragujevac 18, no. 49 (2021): 239–52. http://dx.doi.org/10.46793/naskg2149.239v.

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The paper shows how human experience of nature influences poetic of oral lyric, more precisely – formation of spatial and temporal models. The functions of birds in these models are determined by their characteristic of flying and singing. Birds have an important role in constructing cosmic notions (axis mundi, hierogamic union, celestial world and master of rain). As ambiguous, birds belong to tame and wild, human and inhuman world. They can easily cross the boundaries in both directions – they arrive from the other world in the human world, and fly away from the human world to the ulterior o

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Arratia, Miguel, Luis Garabito Ruiz, Jiajun Huang, Sebouh J. Paul, Sean Preins, and Miguel Rodriguez. "Studies of time resolution, light yield, and crosstalk using SiPM-on-tile calorimetry for the future Electron-Ion Collider." Journal of Instrumentation 18, no. 05 (2023): P05045. http://dx.doi.org/10.1088/1748-0221/18/05/p05045.

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Abstract We recently proposed a high-granularity calorimeter insert for the Electron-Ion Collider (EIC) that is based on plastic scintillator tiles readout with silicon photomultipliers. In this work, we concretize its design by characterizing its building blocks with measurements of light yield, optical crosstalk, and timing resolutions using cosmic-rays, an LED, and a beta source. We also compared two approaches for the optical isolation of cells: “megatiles” with grooved boundaries between cells, and a 3D-printed plastic frame hosting individual cells. We found that the latter suppresses op

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Rincon, Hernan, Segev Benzvi, Kelly Douglass, et al. "DESIVAST: Catalogs of Low-redshift Voids Using Data from the DESI Data Release 1 Bright Galaxy Survey." Astrophysical Journal 982, no. 1 (2025): 38. https://doi.org/10.3847/1538-4357/adb559.

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Abstract We present three separate void catalogs created using a volume-limited sample of the DESI Data Release 1 Bright Galaxy Survey. We use the algorithms VoidFinder and V2 to construct void catalogs out to a redshift of z = 0.24. Excluding voids affected by the boundaries of the survey, we obtain 1489 voids with VoidFinder, 389 with V2 using REVOLVER pruning, and 297 with V2 using VIDE pruning. Comparing our catalogs with overlapping Sloan Digital Sky Survey void catalogs, we find generally consistent void properties but significant differences in the void volume overlap, which we attribut

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Lazar, Iwona, Christian Rodenbücher, Gustav Bihlmayer, et al. "The Electrodegradation Process in PZT Ceramics under Exposure to Cosmic Environmental Conditions." Molecules 28, no. 9 (2023): 3652. http://dx.doi.org/10.3390/molecules28093652.

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Long-time electric field action on perovskite piezoelectric ceramic leads to chemical degradation. A new way to accelerate the degradation is the exposure of the ceramic to DC electric fields under a vacuum. A high-quality commercial piezoelectric material based on PbZr1−xTixO3 is used to study such impacts. To avoid the influence of ferroelectric properties and possible removal of oxygen and lead oxides during the degradation process, the experiments are in the temperature interval of 500 °C > T > TC. Changes in resistance during the electrodegradation process is an electrically-induced

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Farmer, R., E. Laplace, S. E. de Mink, and S. Justham. "The Cosmic Carbon Footprint of Massive Stars Stripped in Binary Systems." Astrophysical Journal 923, no. 2 (2021): 214. http://dx.doi.org/10.3847/1538-4357/ac2f44.

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Abstract The cosmic origin of carbon, a fundamental building block of life, is still uncertain. Yield predictions for massive stars are almost exclusively based on single-star models, even though a large fraction interact with a binary companion. Using the MESA stellar evolution code, we predict the amount of carbon ejected in the winds and supernovae of single and binary-stripped stars at solar metallicity. We find that binary-stripped stars are twice as efficient at producing carbon (1.5–2.6 times, depending on choices regarding the slope of the initial mass function and black hole formation

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Nagashima, K., I. Kondo, I. Morishita, and R. M. Jacklyn. "The influence of the sidereal cosmic-ray anisotropies originated on the tail- and nose-boundaries of the heliomagnetosphere (HMS) upon the solar cosmic-ray anisotropy produced inside the HMS." Earth, Planets and Space 62, no. 6 (2010): 525–44. http://dx.doi.org/10.5047/eps.2010.02.012.

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Groisman, Alberto. "Cosmic and Comic: Jocosity and creativity as strategies to turn off boundaries in a Ayahuasca Religion in The Netherlands." Religie & Samenleving 5, no. 1 (2010): 54–72. http://dx.doi.org/10.54195/rs.13088.

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Nagashima, K., I. Kondo, and Z. Fujii. "Sharply concentrated cosmic-ray excess fluxes from heliomagnetospheric nose and tail boundaries observed with neutron monitors on the ground." Earth, Planets and Space 57, no. 11 (2005): 1083–91. http://dx.doi.org/10.1186/bf03351887.

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Sternberg, Amiel, Shmuel Bialy, and Alon Gurman. "H i in Molecular Clouds: Irradiation by FUV Plus Cosmic Rays." Astrophysical Journal 960, no. 1 (2023): 8. http://dx.doi.org/10.3847/1538-4357/ad0465.

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Abstract We extend the analytic theory presented by Sternberg et al. and Bialy & Sternberg for the production of atomic hydrogen (H i) via far-ultraviolet (FUV) photodissociation at the boundaries of dense interstellar molecular (H2) clouds to also include the effects of penetrating (low-energy) cosmic rays (CRs) for the growth of the total H i column densities. We compute the steady-state abundances of the H i and H2 in one-dimensional gas slabs in which the FUV photodissociation rates are reduced by depth-dependent H2 self-shielding and dust absorption and the CR ionization rates are eit

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Behrend, Caleb J., Catherine P. Tarnowski, and Michael D. Morris. "Identification of Outliers in Hyperspectral Raman Image Data by Nearest Neighbor Comparison." Applied Spectroscopy 56, no. 11 (2002): 1458–61. http://dx.doi.org/10.1366/00037020260377760.

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A new algorithm for removal of cosmic spikes from hyperspectral Raman image data sets is presented. Spectra in a 3 × 3 pixel neighborhood are used to identify outlier-contaminated data points in the central pixel of that neighborhood. A preliminary despiking of the neighboring spectra is performed by median filtering. Correlations between the central pixel spectrum and its despiked neighbors are calculated, and the most highly correlated spectrum is used to identify outliers. Spike-contaminated data are replaced using results of polynomial interpolation. Because the neighborhood contains spect

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Adda, Fayçal Ben, and Hélène Porchon. "Infinity of geodesics in a homogeneous and isotropic expanding space-time." International Journal of Geometric Methods in Modern Physics 13, no. 04 (2016): 1650048. http://dx.doi.org/10.1142/s0219887816500481.

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In this paper, we construct a discrete simulation of an expanding homogeneous and isotropic space-time that expands via expansion of its basic elements to figure out properties and characteristics of such a space-time and derive conclusions. We prove that in such an expanding space-time, the geodesics are curved and more precisely, they fluctuate on the boundaries of the expanding basic elements. The non-existence of privileged expansion direction leads to the existence of an infinity of fluctuating geodesics between any two locations in this space-time, that provides a prediction of polarizat

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Koivu, Emily, Heyang Long, Yuanyuan Yang та Christopher M. Hirata. "Lyman-α polarization from cosmological ionization fronts. Part II. Implications for intensity mapping". Journal of Cosmology and Astroparticle Physics 2023, № 05 (2023): 042. http://dx.doi.org/10.1088/1475-7516/2023/05/042.

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Abstract This is the second paper in a series whose aim is to predict the power spectrum of intensity and polarized intensity from cosmic reionization fronts. After building the analytic models for intensity and polarized intensity calculations in paper I, here we apply these models to simulations of reionization. We construct a geometric model for identifying front boundaries, calculate the intensity and polarized intensity for each front, and compute a power spectrum of these results. This method was applied to different simulation sizes and resolutions, so we ensure that our results are con

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Antarip Kataki. "The Role of Gravitational Waves in Understanding the Cosmic Evolution and The Underlying Physics of The Universe." Acceleron Aerospace Journal 3, no. 6 (2024): 670–78. https://doi.org/10.61359/11.2106-2466.

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The field of gravitational wave research has rapidly evolved since the first successful detection in 2015, marking the beginning of a new era in astrophysics. This paper reviews the current state of gravitational wave detection and explores the future directions that promise to advance our understanding of the universe. We discuss the advancements and limitations of current ground- based observatories, such as LIGO and Virgo, as well as the pivotal role of upcoming third- generation detectors like the Einstein Telescope and space-based missions like LISA. Key areas of development are identifie

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Ustyugov, G. V., and V. V. Ershov. "Influence of cosmic factors on mud volcanic activity of the Earth." Geosystems of Transition Zones 7, no. 1 (2023): 5–24. http://dx.doi.org/10.30730/gtrz.2023.7.1.005-024.

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In this work, the influence of various cosmic factors (gravitational influence of the Moon and the Sun, solar activity, the Earth’s rotation) on mud volcanic activity was analyzed for the first time. The analysis was carried out mainly on the example of mud volcanoes in Azerbaijan, for which there is the largest and most complete catalog of eruptions (431 events over almost 210 years). It has been found that the activity of mud volcanoes can increase after syzygial tides, when the Earth is in line with the Moon and the Sun (their tidal forces are summed up in this case). The response of mud vo

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Zhang, Nan. "‘Solemn Progress’: Woolf, Burke, and the Negotiation of Virtue." Modernist Cultures 12, no. 3 (2017): 391–415. http://dx.doi.org/10.3366/mod.2017.0184.

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This essay analyzes Virginia Woolf's exploration of a public spirit exceeding both bourgeois egotism and narrow patriotic allegiances prescribed by the imperial state. Excavating hitherto unexamined affinities between Woolf and Edmund Burke, the essay shows how Woolf's vision of ‘solemn progress’ in Mrs Dalloway effectively conjoins a Burkean emphasis on the civilizing effects of aesthetic sentiments with a Renaissance humanist notion of virtù. Woolf's re-imagining of solidarity involves two moves that are temporally divergent yet temperamentally complementary: a renewal of attention to older

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Hermans, Carolien. "Oceanic feeling: Towards a fluid philosophy of moving bodies." Journal of Dance & Somatic Practices 13, no. 1 (2021): 133–43. http://dx.doi.org/10.1386/jdsp_00042_1.

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In this article, I use Romain Rolland’s oceanic feeling as an entrance point to explore the transformative nature of dance improvisation. Oceanic feeling includes both a feeling of dissolution of the boundaries of the self and a feeling of unity, embracement and openness. The feeling of interconnectedness, with living and non-living entities, indeed with the cosmic world as such, is a vital force in dance improvisational practice. Dance improvisation is deeply relational: it is concerned with contact, with touching-the-world as well as being-touched-by-the-world. Through the synchronization of

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