Gotowe bibliografie tematyczne / X-factor universe

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Gotowa bibliografia na temat „X-factor universe”

Autor: Grafiati

Data publikacji: 3 czerwca 2025

Data aktualizacji: 31 lipca 2025

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Artykuły w czasopismach na temat "X-factor universe"

Krivonos, Roman A., and Mikhail G. Revnivtsev. "The X-Ray AGN Bias Factor at Zero Redshift." Proceedings of the International Astronomical Union 5, S267 (2009): 462. http://dx.doi.org/10.1017/s1743921310007040.

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AbstractUsing an AGN sample from the INTEGRAL all-sky survey, we show that the density fluctuations of matter in the local universe translate linearly into the density fluctuations of accreting supermassive black holes. Our results imply that hard X-ray emitting AGNs are unbiased tracers of the galaxy population in the nearby universe and SMBH activity is independent of the density of galaxies.

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Marčinskas, Albinas, and Daumantas Matonis. "Value Oriented Quality Strategy under Uncertain Conditions." Business: Theory and Practice 12, no. (3) (2011): 286–95. https://doi.org/10.3846/btp.2011.29.

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The authors of the article established the goal to evaluate the possibilities for strengthening the value orientation in the organization towards key success drivers which form a framework of X-factor universe. For this purpose exploration of the valuation on the success drivers as values was made. The authors used method of sociological enquiry of industrial enterprise personnel. The demand to increase valuations on the key success drivers of X-factor universe as determinants of organization perspective was proved after the investigation. Exploration showed differences of value system among v

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OHKUWA, YOSHIAKI. "THIRD QUANTIZATION OF KALUZA–KLEIN COSMOLOGY AND COMPACTIFICATION." International Journal of Modern Physics A 13, no. 23 (1998): 4091–100. http://dx.doi.org/10.1142/s0217751x98001918.

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We study on the third quantization of a Kaluza–Klein toy model. In this model time (x) is defined by the scale factor of universe, and the space coordinate (y) is defined by the ratio of the scales of the ordinary space and the internal space. We calculate the number density of the universes created from nothing and examine whether the compactification can be explained statistically by the idea of the third quantization.

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White, N. E., and H. Tananbaum. "The Constellation X-ray Mission." Symposium - International Astronomical Union 195 (2000): 61–68. http://dx.doi.org/10.1017/s0074180900162783.

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The Constellation-X mission is a large collecting-area X-ray facility emphasizing observations at high spectral resolution (E/ΔE ~ 300–3000) while covering a broad energy band (0.25–40 keV). By increasing the telescope aperture and utilizing efficient spectrometers, the mission will achieve a factor of 100 increased sensitivity over current high-resolution X-ray spectroscopy missions. The use of focusing optics across the 10–40 keV band will provide a similar factor of 100 increased sensitivity in this band. When observations commence in ~ 2008, Constellation-X will address many pressing quest

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Czachor, Marek. "Cosmic-Time Quantum Mechanics and the Passage-of-Time Problem." Universe 9, no. 4 (2023): 188. http://dx.doi.org/10.3390/universe9040188.

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A new dynamical paradigm merging quantum dynamics with cosmology is discussed. We distinguish between a universe and its background space-time. The universe here is the subset of space-time defined by Ψτ(x)≠0, where Ψτ(x) is a solution of a Schrödinger equation, x is a point in n-dimensional Minkowski space, and τ≥0 is a dimensionless ‘cosmic-time’ evolution parameter. We derive the form of the Schrödinger equation and show that an empty universe is described by a Ψτ(x) that propagates towards the future inside some future-cone V+. The resulting dynamical semigroup is unitary, i.e., ∫V+d4x|Ψτ(

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Lacombe, Osmin, та Shinji Mukohyama. "Self-tuning of the cosmological constant in brane-worlds with P(X,ϕ)". Journal of Cosmology and Astroparticle Physics 2022, № 10 (2022): 014. http://dx.doi.org/10.1088/1475-7516/2022/10/014.

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Abstract We revisit the idea of self-tuning the observed cosmological constant to a vanishing value and promote it to a selection criterion of brane-world models, in which our Universe is described by a 3-brane embedded in a 5d bulk. As a concrete setup, we consider a bulk scalar field ϕ described by a general Lagrangian P(X,ϕ) with X = -(∂ϕ)2/2. By requiring that the model enforces the 4d curvature of the maximally symmetric 3-brane world-volume to vanish independently of the 4d effective vacuum energy, only two possibilities remain: one with a canonical bulk kinetic term and the other with a

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Yang, Rong-Jia, Shuang Nan Zhang, Bohai Chen, and Jing-Zhao Qi. "An Old Universe in K-Essence Cosmology." ISRN Astronomy and Astrophysics 2011 (January 9, 2011): 1–5. http://dx.doi.org/10.5402/2011/523617.

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Models in which the Lagrangian contains only a kinetic factor and does not depend explicitly on the field itself in k-essence cosmology are considered. In the case of a constant potential, we obtain an exact analytic solution of k-essence, wk=−(3α−2)/3α, under a simple hypothesis, a=a0(t/t0)α, but without any assumption about the form of F(X). In purely kinetic k-essence model, the acceleration can only be induced after the matter-dominated epoch; the Universe is about 33.5−3.4+4.2 Gyr old now and about 3.1 Gyr old at z=3.9 which is consistent with the fact of quasar observation, while this ob

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Makino, Nobuyoshi, and Yasushi Suto. "X-Ray Gas Mass Fraction in the Shapley Supercluster and Its Implication on the Cosmological Baryon-Density Parameter." Publications of the Astronomical Society of Japan 45, no. 2 (1993): L13—L19. https://doi.org/10.1093/pasj/45.2.l13.

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Abstract We estimated the X-ray gas mass of the clusters in the Shapley Supercluster by improving a previous estimate based on the extrapolation from the Coma data. Assuming that the stellar mass in clusters amounts to 25% of that of the gas mass, the total baryon mass in the Shapley Supercluster is 0.48-1.3×1015h50-2.5M⊙ within 37h50-1 Mpc from the center of the Supercluster (h50 is the Hubble constant in units of 50 km s–1 Mpc–1). Our estimate of the X-ray gas mass in the Shapley Supercluster, which depends on h50 and β (a power-law index characterizing the gas density profile around a clust

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F Crawford, David. "Diffuse Background X Rays and the Density of the Intergalactic Medium." Australian Journal of Physics 40, no. 3 (1987): 459. http://dx.doi.org/10.1071/ph870459.

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Most of the 3-300 keY spectrum of the unresolved X-ray background can be explained as thermal bremsstrahlung from a hot intergalactic gas plus a small non-thermal component at higher energies. The model used assumes a static Universe with an exponential redshift with distance relationship that is due to photon interactions with curved space-time. The interglactic gas is found to have a temperature of 1 �3 x 109 K and a density of 2.05 C - 213 hydrogen atoms m - 3, where C is an unknown factor that depends on the dumpiness of the intergalactic gas.

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Dimitrijevic, Ivan, Branko Dragovich, Zoran Rakic, and Jelena Stankovic. "On nonlocal gravity with constant scalar curvature." Publications de l'Institut Math?matique (Belgrade) 103, no. 117 (2018): 53–59. http://dx.doi.org/10.2298/pim1817053d.

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A class of nonlocal gravity models, where nonlocal term contains an analytic function of the d?Alembert operator _, is considered. For simplicity, these models are considered without matter sector. Related equations of motion for gravitational field g??(x) are presented and analyzed for a constant scalar curvature R. The corresponding solutions for the cosmological scale factor a(t) of the FLRW universe are found and discussed.

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Książki na temat "X-factor universe"

Isett, Philip. Bounds for the Corrections. Princeton University Press, 2017. http://dx.doi.org/10.23943/princeton/9780691174822.003.0022.

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This chapter derives the bounds for the correction terms, starting with bounds for the velocity correction. Based on V of the form V = Δ‎ x W, it introduces a proposition for estimating the spatial derivatives of W. Since the number of Wsubscript I supported at any given region of ℝ x ³ is bounded by a universal constant, it suffices to estimate Wsubscript I uniformly in I. For an individual wave, it is easy to see that the estimate will hold. During repeated differentiation, the derivative hits either the oscillatory factor, the phase direction, or the amplitude wsubscript I or one of its der

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Części książek na temat "X-factor universe"

Ribeiro, Aline Souto, Beatriz Majella Binato, Danielle Galdino de Paula, and Raisa Duarte da Silva Ribeiro. "Biopsychosocial impacts of alcohol abuse: Integrative review." In Uniting Knowledge Integrated Scientific Research For Global Development V.2. Seven Editora, 2024. http://dx.doi.org/10.56238/sevened2024.018-018.

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Based on the premise that alcohol use is a complex, multifactorial issue of great relevance to society, it is understood that there is no simple and universal answer that can account for all the problems involved in drug use and arising from it. To identify and analyze biopsychosocial factors in alcohol users, an integrative review was carried out based on articles available in the VHL online search portals, being listed: PubMed and Scielo. The initial search identified 202 publications on the subject, and 18 articles that met the objectives of the study were listed, based on the inclusion cri

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Whitley, James. "Writing to the Gods? Archaic votives, inscribed and uninscribed." In Skrifter utgivna av Svenska Institutet i Athen, 4°. Swedish Institute at Athens, 2024. http://dx.doi.org/10.30549/actaath-4-59-14.

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Every Classical scholar interested in Greek religion is familiar with the ἀνέθηκε (ανεθεκε) formula, where X dedicates Y to a deity. But it is wrong to think that what is familiar is what we fully understand. Not all votives were so inscribed, or even inscribed at all, and the ἀνέθηκε formula was by no means universal across the Greek-speaking Mediterranean in the Archaic period. In this paper I explore what factors might have led to a votive being inscribed, and to look at whether inscriptions made any difference as to how votives were used and valued. Were inscribed votives in use for longer

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Bokuchava, Guram, and Irakli Nakhutsrishvili. "Si x Ge 1-x Thermoelectric: Determination of Electronic Quality Factor, Universal Electrical Conductivity, Effective Mass, Mobility of Charge Carriers and Preparation of Monolithic Module Based on Si 0.7 Ge 0.3 Alloy." In Fundamental Research and Application of Physical Science Vol. 4. B P International (a part of SCIENCEDOMAIN International), 2023. http://dx.doi.org/10.9734/bpi/fraps/v4/18953d.

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Streszczenia konferencji na temat "X-factor universe"

Sharykin, I., and I. Zimovets. "Investigation of the dynamics of the magnetic field and vertical electric current during the precursors of the M6.5 class solar flare of June 22, 2015 using vector 135-second HMI magnetograms." In Modern astronomy: from the Early Universe to exoplanets and black holes. Special Astrophysical Observatory of the Russian Academy of Sciences, 2024. https://doi.org/10.26119/vak2024.114.

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This paper considers the M6.5 eruptive solar flare occurred on June 22, 2015, for which ultraviolet preflare emission sources in the 1600 Å chromospheric channel have been analyzed using AIA/SDO data. Magnetic fields at the photospheric level are also analyzed using HMI/SDO vector magnetograms with a time resolution of 135 seconds. Since the selected flare has a long preflare phase (about one hour), the available time resolution of vector magnetograms is sufficient to study the flare and preflare dynamics of magnetic fields at the photospheric level. It can be noted that the literature mainly

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Busarev, V. "Asteroid activity: spectral features and probable physical reasons." In Modern astronomy: from the Early Universe to exoplanets and black holes. Special Astrophysical Observatory of the Russian Academy of Sciences, 2024. https://doi.org/10.26119/vak2024.099.

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Spectral signs of sublimation-driven dust activity of main-belt asteroids with primitive mineralogy (of C, B, F, G, and X types) are considered. The reflectance spectra of active asteroids of primitive types are compared with model ones of a conditionally active C-type asteroid surrounded by a dust exosphere consisting of submicron aggregate particles of different composition. This phenomenon in primitive asteroids may be impact-induced and become subsequently periodic near perihelion if connected with considerable water ice deposits of the asteroids. Significant additional factors influencing

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Rabie, Mohamed, Mohammad Irshidat, and Nasser Al-Nuaimi. "Development of Sustainable Eco-friendly Geopolymer Composites for Construction Applications." In Qatar University Annual Research Forum & Exhibition. Qatar University Press, 2020. http://dx.doi.org/10.29117/quarfe.2020.0089.

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Geopolymerization is a process where silica and alumina rich source materials turns into excellent binding materials by the aid of alkali solutions. Materials such as fly ash are by-products in energy power plants. Fly ash is classified based on its constituent materials. Fly ash class F mainly consists of alumina and silica. Compressive strength of class F fly ash geopolymer mortar is influenced by many factors such as the molarity of sodium hydroxide solution, fluid to binder ratio, Na2SiO3/NaOH ratio, curing duration and curing temperatures. The present study investigates the effect of thes

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Kocharian, Tikran, and Sanjivan Manoharan. "Systematic Review of Endodontic Irrigation – Standardization of the Irrigation Procedure." In ASME 2024 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2024. https://doi.org/10.1115/imece2024-145998.

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Abstract Root canal therapy, also known as endodontic treatment, is a dental procedure to treat the infected pulp of a tooth. A series of steps are done by the dentist during this treatment including X-ray imaging of the tooth, mechanical preparation and extraction of the pulp, irrigation of the root canal, and filling of the cavity. Of these steps, the root canal irrigation is particularly crucial as a significant number of root canal procedures encounter challenges at this stage. Despite its importance, no standardized endodontic irrigation procedure exists to date. Discrepancies in irrigati

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Kaplan, A. E., and C. T. Law. "Ultranarrow x-ray lines radiated by an electron beam in a solid-state superlattice." In OSA Annual Meeting. Optica Publishing Group, 1986. http://dx.doi.org/10.1364/oam.1986.wp7.

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We show that anomalous dispersion in the vicinity of absorption edges of the material can greatly enhance x-ray transition radiation of a low-energy electron beam passing through the multilayer solid-state structure. We showed earlier1 that the critical energy of the electron beam required to obtain soft x-ray radiation in such a structure with a 50-100-Å spatial period can be as low as a few hundred keV. We demonstrate here that the anomalous dispersion near the absorption edge of one of the solid-state materials forming the multilayer structure yields radiation with very narrow spectrum in t

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