Bibliografías temáticas / Gamma

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  1. Artículos de revistas
  2. Tesis
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Literatura académica sobre el tema "Gamma"

Autor: Grafiati
Publicado: 4 de junio de 2021
Última modificación: 21 de diciembre de 2024

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Artículos de revistas sobre el tema "Gamma"

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Tombor, László, Brigitta Kakuszi, Szilvia Papp, János Réthelyi, István Bitter y Pál Czobor. "Atypical resting-state gamma band trajectory in adult attention deficit/hyperactivity disorder". Journal of Neural Transmission 128, n.º 8 (23 de junio de 2021): 1239–48. http://dx.doi.org/10.1007/s00702-021-02368-2.

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AbstractDecreased gamma activity has been reported both in children and adults with attention deficit/hyperactivity disorder (ADHD). However, while ADHD is a lifelong neurodevelopmental disorder, our insight into the associations of spontaneous gamma band activity with age is limited, especially in adults. Therefore, we conducted an explorative study to investigate trajectories of resting gamma activity in adult ADHD patients (N = 42) versus matched healthy controls (N = 59). We investigated the relationship of resting gamma activity (30–48 Hz) with age in four right hemispheric electrode clusters where diminished gamma power in ADHD had previously been demonstrated by our group. We found significant non-linear association between resting gamma power and age in the lower frequency gamma1 range (30–39 Hz) in ADHD as compared to controls in all investigated locations. Resting gamma1 increased with age and was significantly lower in ADHD than in control subjects from early adulthood. We found no significant association between gamma activity and age in the gamma2 range (39–48 Hz). Alterations of gamma band activity might reflect altered cortical network functioning in adult ADHD relative to controls. Our results reveal that abnormal gamma power is present at all ages, highlighting the lifelong nature of ADHD. Nonetheless, longitudinal studies are needed to confirm our results.
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Абдуллаев, Жаникул Ибрагимович, Zhanikul Ibragimovich Abdullaev, Журабек Хусанович Боймуродов, Jurabek Khusanovich Boymurodov, Ахмад Мияссарович Халхужаев y Akhmad Miyassarovich Khalkhuzhaev. "On the Existence of Eigenvalues of the Three-Particle Discrete Schrödinger Operator". Matematicheskie Zametki 114, n.º 5 (2023): 643–58. http://dx.doi.org/10.4213/mzm13962.

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Рассматривается трехчастичный оператор Шрeдингера $H_{\mu,\lambda,\gamma} (\mathbf K)$, $\mathbf K\in \mathbb{T}^3$, ассоциированный с системой трех частиц (две из них - бозоны с массой $1$ и одна - произвольная с массой $m=1/\gamma<1$), взаимодействующих с помощью парных контактных потенциалов $\mu>0$ и $\lambda>0$ на трехмерной решетке $\mathbb{Z}^3$. Доказано, что существуют критические значения отношений масс $\gamma=\gamma_{1}$ и $\gamma=\gamma_{2}$ такие, что оператор $H_{\mu,\lambda,\gamma}(\mathbf{0})$, $\mathbf{0}=(0,0,0)$ имеет: для $\gamma\in (0,\gamma_{1})$ по крайней мере одно собственное значение, для $\gamma\in (\gamma_{1},\gamma_{2})$ не менее двух и для $\gamma\in (\gamma_{2}, +\infty)$ не менее четырех собственных значений, лежащих левее существенного спектра при достаточно больших $\mu>0$ и фиксированном $\lambda>0$. Библиография: 23 названия.
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Zhang, Chang-Xu, Fu-Tao Hu y Shu-Cheng Yang. "On the (total) Roman domination in Latin square graphs". AIMS Mathematics 9, n.º 1 (2023): 594–606. http://dx.doi.org/10.3934/math.2024031.

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<abstract><p>Latin square, also known as Latin square matrix, refers to a kind of $ n\times n $ matrix, in which there are exactly $ n $ different symbols and each symbol appears exactly once in each row and column. A Latin square graph $ \Gamma(L) $ is a simple graph associated with a Latin square $ L $. This paper studied the relationships between the (total) Roman domination number and (total) domination number of Latin square graph $ \Gamma(L) $. We showed that $ \gamma_{R}(\Gamma(L)) = 2\gamma(\Gamma(L)) $ or $ \gamma_{R}(\Gamma(L)) = 2\gamma(\Gamma(L))-1 $, and $ \gamma_{tR}(\Gamma(L))\ge \frac{8\gamma_t(\Gamma(L))}{5} $ for $ n\ge 2 $. In 2021, Pahlavsay et al. proved $ \gamma(\Gamma(L))\ge \lceil \frac{n}{2}\rceil $ and $ \gamma_t(\Gamma(L))\ge \lceil \frac{4n-2}{7}\rceil $ for $ n\ge 2 $. In this paper, we showed that $ \gamma_R(\Gamma(L))\ge 2\lceil \frac{n}{2}\rceil $ (equality holds if, and only if, $ \gamma(\Gamma(L)) = \lceil \frac{n}{2}\rceil $) and $ \gamma_t(\Gamma(L)) &gt; \frac{4n}{7} $ for $ n\ge 2 $. Since $ \gamma_R(G)\le 2\gamma(G) $ and $ \gamma_{tR}(G)\le 2\gamma_t(G) $ for any graph $ G $, our results can deduce or improve Pahlavsay et al.'s results. Moreover, we characterized these Latin squares for $ \gamma_R(\Gamma(L)) = 2\lceil \frac{n}{2}\rceil $, which is equal to $ \gamma(\Gamma(L)) = \lceil \frac{n}{2}\rceil $.</p></abstract>
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Qu, Feifei y Xin Wei. "Limit behaviour of constant distance boundaries of Jordan curves". AIMS Mathematics 7, n.º 6 (2022): 11311–19. http://dx.doi.org/10.3934/math.2022631.

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<abstract><p>For a Jordan curve $ \Gamma $ in the complex plane, its constant distance boundary $ \Gamma_ \lambda $ is an inflated version of $ \Gamma $. A flatness condition, $ (1/2, r_0) $-chordal property, guarantees that $ \Gamma_ \lambda $ is a Jordan curve when $ \lambda $ is not too large. We prove that $ \Gamma_ \lambda $ converges to $ \Gamma $, as $ \lambda $ approaching to $ 0 $, in the sense of Hausdorff distance if $ \Gamma $ has the $ (1/2, r_0) $-chordal property.</p></abstract>
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Arcasoy, M. O., M. Romana, M. E. Fabry, E. Skarpidi, R. L. Nagel y B. G. Forget. "High levels of human gamma-globin gene expression in adult mice carrying a transgene of deletion-type hereditary persistence of fetal hemoglobin." Molecular and Cellular Biology 17, n.º 4 (abril de 1997): 2076–89. http://dx.doi.org/10.1128/mcb.17.4.2076.

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Persistent expression of the gamma-globin genes in adults with deletion types of hereditary persistence of fetal hemoglobin (HPFH) is thought to be mediated by enhancer-like effects of DNA sequences at the 3' breakpoints of the deletions. A transgenic mouse model of deletion-type HPFH was generated by using a DNA fragment containing both human gamma-globin genes and HPFH-2 breakpoint DNA sequences linked to the core sequences of the locus control region (LCR) of the human beta-globin gene cluster. Analysis of gamma-globin expression in six HPFH transgenic lines demonstrated persistence of gamma-globin mRNA and peptides in erythrocytes of adult HPFH transgenic mice. Analysis of the hemoglobin phenotype of adult HPFH transgenic animals by isoelectric focusing showed the presence of hybrid mouse alpha2-human gamma2 tetramers as well as human gamma4 homotetramers (hemoglobin Bart's). In contrast, correct developmental regulation of the gamma-globin genes with essentially absent gamma-globin gene expression in adult erythroid cells was observed in two control non-HPFH transgenic lines, consistent with autonomous silencing of normal human gamma-globin expression in adult transgenic mice. Interestingly, marked preferential overexpression of the LCR-distal (A)gamma-globin gene but not of the LCR-proximal (G)gamma-globin gene was observed at all developmental stages in erythroid cells of HPFH-2 transgenic mice. These findings were also associated with the formation of a DNase I-hypersensitive site in the HPFH-2 breakpoint DNA of transgenic murine erythroid cells, as occurs in normal human erythroid cells in vivo. These results indicate that breakpoint DNA sequences in deletion-type HPFH-2 can modify the developmentally regulated expression of the gamma-globin genes.
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Haas, C., B. Ryffel y M. Le Hir. "IFN-gamma is essential for the development of autoimmune glomerulonephritis in MRL/Ipr mice." Journal of Immunology 158, n.º 11 (1 de junio de 1997): 5484–91. http://dx.doi.org/10.4049/jimmunol.158.11.5484.

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Abstract MRL/lpr mice develop lymphoproliferation and accelerated autoimmune glomerulonephritis from which they ultimately die. To investigate the role of IFN-gamma in the manifestation of the disease, we generated MRL/lpr mice lacking the IFN-gamma receptor (MRL/lpr gammaR -/-). The absence of IFN-gamma signaling had no effect on generalized lymphoproliferation, expansion of CD4- CD8- double-negative T cells, or hypergammaglobulinemia. By contrast, glomerulonephritis as detected by proteinuria and histology was absent in MRL/lpr gammaR -/- mice. While serum IgG1 anti-dsDNA Abs were increased in all three strains of MRL/lpr mice (gammaR +/+, +/-, -/-), those of the IgG2a and IgG3 isotypes were low in MRL/lpr gammaR -/- mice. Immune complexes and C3 deposition were dramatically reduced in the glomerular capillaries of MRL/lpr gammaR -/- mice compared with MRL/lpr gammaR +/+ and +/- mice. Therefore, IFN-gamma plays a key regulatory role in the development of nephritis in MRL/lpr mice. Low levels of IFN-gamma-dependent IgG2a and IgG3 autoantibodies in MRL/lpr gammaR -/- mice might protect them from the pathogenic features of IgG3 cryoglobulins and complement-activating IgG2a and IgG3.
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Lietti, S. M. y C. A. de S. Pires. "Testing non-commutative QED $\gamma\gamma\gamma$ and $\gamma\gamma\gamma\gamma$ couplings at LHC". European Physical Journal C 35, n.º 1 (junio de 2004): 137–43. http://dx.doi.org/10.1140/epjc/s2004-01777-5.

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Eakawinrujee, Pannawat y Nantapath Trakultraipruk. "γ-paired dominating graphs of cycles". Opuscula Mathematica 42, n.º 1 (2022): 31–54. http://dx.doi.org/10.7494/opmath.2022.42.1.31.

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A paired dominating set of a graph \(G\) is a dominating set whose induced subgraph contains a perfect matching. The paired domination number, denoted by \(\gamma_{pr}(G)\), is the minimum cardinality of a paired dominating set of \(G\). A \(\gamma_{pr}(G)\)-set is a paired dominating set of cardinality \(\gamma_{pr}(G)\). The \(\gamma\)-paired dominating graph of \(G\), denoted by \(PD_{\gamma}(G)\), as the graph whose vertices are \(\gamma_{pr}(G)\)-sets. Two \(\gamma_{pr}(G)\)-sets \(D_1\) and \(D_2\) are adjacent in \(PD_{\gamma}(G)\) if there exists a vertex \(u\in D_1\) and a vertex \(v\notin D_1\) such that \(D_2=(D_1\setminus \{u\})\cup \{v\}\). In this paper, we present the \(\gamma\)-paired dominating graphs of cycles.
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Wang, Youjun y Yaotian Shen. "Existence and Asymptotic Behavior of Positive Solutions for a Class of Quasilinear Schrödinger Equations". Advanced Nonlinear Studies 18, n.º 1 (1 de febrero de 2018): 131–50. http://dx.doi.org/10.1515/ans-2017-6026.

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AbstractIn this paper, we study the quasilinear Schrödinger equation{-\Delta u+V(x)u-\frac{\gamma}{2}(\Delta u^{2})u=|u|^{p-2}u},{x\in\mathbb{R}^{N}}, where{V(x):\mathbb{R}^{N}\to\mathbb{R}}is a given potential,{\gamma>0}, and either{p\in(2,2^{*})},{2^{*}=\frac{2N}{N-2}}for{N\geq 4}or{p\in(2,4)}for{N=3}. If{\gamma\in(0,\gamma_{0})}for some{\gamma_{0}>0}, we establish the existence of a positive solution{u_{\gamma}}satisfying{\max_{x\in\mathbb{R}^{N}}|\gamma^{\mu}u_{\gamma}(x)|\to 0}as{\gamma\to 0^{+}}for any{\mu>\frac{1}{2}}. Particularly, if{V(x)=\lambda>0}, we prove the existence of a positive classical radial solution{u_{\gamma}}and up to a subsequence,{u_{\gamma}\to u_{0}}in{H^{2}(\mathbb{R}^{N})\cap C^{2}(\mathbb{R}^{N})}as{\gamma\to 0^{+}}, where{u_{0}}is the ground state of the problem{-\Delta u+\lambda u=|u|^{p-2}u},{x\in\mathbb{R}^{N}}.
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Tartas, Adrianna, Lovisa Lundholm, Harry Scherthan, Andrzej Wojcik y Beata Brzozowska. "The order of sequential exposure of U2OS cells to gamma and alpha radiation influences the formation and decay dynamics of NBS1 foci". PLOS ONE 18, n.º 6 (12 de junio de 2023): e0286902. http://dx.doi.org/10.1371/journal.pone.0286902.

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DNA double strand breaks (DSBs) are a deleterious form of DNA damage. Densely ionising alpha radiation predominantly induces complex DSBs and sparsely ionising gamma radiation—simple DSBs. We have shown that alphas and gammas, when applied simultaneously, interact in producing a higher DNA damage response (DDR) than predicted by additivity. The mechanisms of the interaction remain obscure. The present study aimed at testing whether the sequence of exposure to alphas and gammas has an impact on the DDR, visualised by live NBS1-GFP (green fluorescent protein) focus dynamics in U2OS cells. Focus formation, decay, intensity and mobility were analysed up to 5 h post exposure. Focus frequencies directly after sequential alpha → gamma and gamma → alpha exposure were similar to gamma alone, but gamma → alpha foci quickly declined below the expected values. Focus intensities and areas following alpha alone and alpha → gamma were larger than after gamma alone and gamma → alpha. Focus movement was most strongly attenuated by alpha → gamma. Overall, sequential alpha → gamma exposure induced the strongest change in characteristics and dynamics of NBS1-GFP foci. Possible explanation is that activation of the DDR is stronger when alpha-induced DNA damage precedes gamma-induced DNA damage.
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Tesis sobre el tema "Gamma"

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Maolinbay, Manat. "Study of reactions e+e- [Pfeil] [Gamma Gamma/Gamma Gamma Gamma] at LEP energies /". [S.l.] : [s.n.], 1995. http://e-collection.ethbib.ethz.ch/show?type=diss&nr=11028.

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Sun, Yongqian. "Dislocation processes in #gamma#' and #gamma#/#gamma#' single crystals". Thesis, University of Oxford, 1990. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.258247.

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Hirstius, Andreas. "Messung des Verzweigungsverhältnisses des seltenen Zerfalls K0s -] [gamma][gamma] [gamma-gamma] mit dem NA48-Detektor". [S.l. : s.n.], 2002. http://ArchiMeD.uni-mainz.de/pub/2002/0161/diss.pdf.

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Tsang, Wing-shing y 曾永成. "Borehole geophysics limitations of natural gamma and gamma-gamma density logging methods". Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2003. http://hub.hku.hk/bib/B42577238.

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Tsang, Wing-shing. "Borehole geophysics limitations of natural gamma and gamma-gamma density logging methods". Click to view the E-thesis via HKUTO, 2003. http://sunzi.lib.hku.hk/hkuto/record/B42577238.

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Teke, Tony. "La physique du [pi] O et le processus [gamma gamma flèche vers la droite gamma gamma] au LHC /". Thèse, Montréal : Trois-Rivières : Université du Québec à Montréal, Université du Québec à Trois-Rivières, 2001. http://www.uqtr.ca/biblio/notice/resume/03-2236003R.html.

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Mémoire (M.Sc.)--Université du Québec à Montréal, 2001.
Le titre comprend des symboles de l'alphabet grec, impossible à reproduire. En tête du titre: Université du Québec à Montréal. Mémoire présenté à l'Université du Québec à Trois-Rivières comme exigence partielle de la maîtrise en physique offerte par extension à l'Université du Québec à Montréal en vertu d'un protocole d'entente avec l'Université du Québec à Trois-Rivières. CaQTU CaQTU CaQTU Bibliogr. : f. 168-169.
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Brown, N. Neil. "Gamma-gamma physics with the Argus detector". Thesis, McGill University, 1985. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=66056.

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Thummerer, Severin. "[Gamma]-Spektroskopie [Gamma-Spektroskopie] deformierter Kerne mit binären Reaktionen". [S.l. : s.n.], 1999. http://www.diss.fu-berlin.de/2000/14/index.html.

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Monageng, Itumeleng. "Optical and gamma-ray study of gamma-ray binaries". Doctoral thesis, University of Cape Town, 2018. http://hdl.handle.net/11427/29509.

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Gamma-ray binary stars are intriguing interacting stellar systems that exhibit emission across the whole electromagnetic spectrum. This thesis is focused on optical and gamma-ray emission of gamma-ray binary stars (GRBis). I have performed radial velocity measurements of 1FGL J1018.6-5856 to derive the orbital parameters of the system. In particular, I derive, for the first time, the orbital eccentricity which, together with other parameters, enables us to attain the orbital geometry of the system. I also use the derived parameters to put constraints on the mass of the compact object. For a large range of orbital inclination angles, a neutron star is favoured, while a black hole is allowed for very low inclination angles. I have also explored the long term variability of the Be disc in LS I +61 303. Using the measured parameters of the Hα emission line together with a semi-analytical model which describes the motions of particles in the disc, I examine long term geometric changes of the Be disc in LS I +61 303. I have explored different possible scenarios for the Be disc changes by studying the variability of the eccentricity and argument of pericenter on the superorbital timescale. One of the effects we have examined from the implication of our results is the Kozai Lidov mechanism, which has so far only been explored theoretically. I have explored the Bethe-Heitler mechanism for the production of gamma-ray emission, where energetic protons collide with stellar photons to produce energetic electron-positron pairs which upscatter photons to high energies. This mechanism has been neglected in studies of photo-hadronic processes due to the larger radiative efficiency of pion production. I demonstrate, however, that the BetheHeitler process can dominate the radiative output at lower proton energies where pairs can form but not pions. I calculate the spectrum and modulated flux in the context of the pulsar wind scenario, with photon-photon absorption and cascading effects taken into account. The effects of the ambient magnetic field around the massive star are also considered, which result in quasi-isotropic gamma-ray emission, and the orbital modulation of the flux resulting in photon-photon absorption. The work presented in this thesis encompasses different observational and theoretical aspects of gamma-ray binaries in which I use data and modeling to address some of the puzzling features of these systems. These include understanding the nature of the compact object, and thereby the physical mechanism driving the multiwavelength emission, the variability of the Be disc and its long term interaction with the compact object, and the origin of high energy emission. The results and methods presented have potential implications not only for understanding these objects, but also for other classes of interacting binaries.
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Bodmann, Bernd. "Stahlenschäden in Plastik-Szintillatoren nach [gamma]- [Gamma] und Neutronen-Bestrahlung". [S.l. : s.n.], 2002. http://deposit.ddb.de/cgi-bin/dokserv?idn=967319951.

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Libros sobre el tema "Gamma"

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Havil, Julian. GAMMA. Berlin, Heidelberg: Springer Berlin Heidelberg, 2007. http://dx.doi.org/10.1007/978-3-540-48496-7.

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Schaal, Bodo. Atomare Defekte in AUCD-Untersuchung mit der gestörten [gamma]-[gamma]-Winkelkorrelation [Gamma-Gamma-Winkelkorrelation]. [s.l.]: [s.n.], 1993.

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Sikorskiĭ, Vadim. Gamma: Stikhi. Moskva: Sovremennik, 1988.

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Engle, R. F. GARCH gamma. Cambridge, MA (1050 Massachusetts Avenue, Cambridge 02138): National Bureau of Economic Research, 1995.

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Lewis, Peter A. W. Gamma processes. Monterey, Calif: Naval Postgraduate School, 1986.

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Tunnicliff, Godfrey, ed. Gamma-Hydroxybutyrate. Abingdon, UK: Taylor & Francis, 2002. http://dx.doi.org/10.4324/9780203300992.

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Danieli, Francesca. Gamma knife. Tucson, Ariz: Nazraeli Press & JGS, 2005.

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Sikorskii, Vadim. Gamma: Stikhi. Moskva: Sovremennik, 1988.

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Vysot͡skiĭ, V. I. Gamma-lazery. Moskva: Izd-vo Moskovskogo univesiteta, 1989.

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Vorobʹev, V. A. Gamma-plotnometrii͡a︡. Moskva: Ėnergoatomizdat, 1989.

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Capítulos de libros sobre el tema "Gamma"

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Havil, Julian. "Die logarithmische Wiege". En GAMMA, 7–29. Berlin, Heidelberg: Springer Berlin Heidelberg, 2007. http://dx.doi.org/10.1007/978-3-540-48496-7_1.

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Havil, Julian. "Gamma als Dezimalbruch". En GAMMA, 95–105. Berlin, Heidelberg: Springer Berlin Heidelberg, 2007. http://dx.doi.org/10.1007/978-3-540-48496-7_10.

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Havil, Julian. "Gamma als rationaler Bruch". En GAMMA, 107–18. Berlin, Heidelberg: Springer Berlin Heidelberg, 2007. http://dx.doi.org/10.1007/978-3-540-48496-7_11.

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Havil, Julian. "Wo ist Gamma?" En GAMMA, 119–38. Berlin, Heidelberg: Springer Berlin Heidelberg, 2007. http://dx.doi.org/10.1007/978-3-540-48496-7_12.

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Havil, Julian. "Die Welt ist harmonisch". En GAMMA, 139–61. Berlin, Heidelberg: Springer Berlin Heidelberg, 2007. http://dx.doi.org/10.1007/978-3-540-48496-7_13.

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Havil, Julian. "Die Welt ist logarithmisch". En GAMMA, 163–88. Berlin, Heidelberg: Springer Berlin Heidelberg, 2007. http://dx.doi.org/10.1007/978-3-540-48496-7_14.

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Havil, Julian. "Probleme mit Primzahlen". En GAMMA, 189–217. Berlin, Heidelberg: Springer Berlin Heidelberg, 2007. http://dx.doi.org/10.1007/978-3-540-48496-7_15.

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Havil, Julian. "Die Riemannsche Initiative". En GAMMA, 219–50. Berlin, Heidelberg: Springer Berlin Heidelberg, 2007. http://dx.doi.org/10.1007/978-3-540-48496-7_16.

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Havil, Julian. "Die harmonische Reihe". En GAMMA, 31–36. Berlin, Heidelberg: Springer Berlin Heidelberg, 2007. http://dx.doi.org/10.1007/978-3-540-48496-7_2.

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Havil, Julian. "Subharmonische Reihen". En GAMMA, 37–47. Berlin, Heidelberg: Springer Berlin Heidelberg, 2007. http://dx.doi.org/10.1007/978-3-540-48496-7_3.

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Actas de conferencias sobre el tema "Gamma"

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Royon, Christophe. "Anomalous WW gamma, WW gamma gamma and ZZ gamma gamma couplings in gamma-induced processes". En XVIII International Workshop on Deep-Inelastic Scattering and Related Subjects. Trieste, Italy: Sissa Medialab, 2010. http://dx.doi.org/10.22323/1.106.0089.

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Klusek-Gawenda, Mariola y Antoni Szczurek. "$\gamma\gamma \to \gamma \gamma$ scattering in ultrarelativistic UPC". En The European Physical Society Conference on High Energy Physics. Trieste, Italy: Sissa Medialab, 2017. http://dx.doi.org/10.22323/1.314.0446.

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van Soelen, Brian y Drikus du Plooy. "Gamma-gamma absorption in gamma-ray binaries". En High Energy Astrophysics in Southern Africa 2021. Trieste, Italy: Sissa Medialab, 2021. http://dx.doi.org/10.22323/1.401.0028.

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Meridiani, Paolo y Ruggero Turra. "Higgs \rightarrow \gamma \gamma". En VI Italian workshop on p-p physics at the LHC. Trieste, Italy: Sissa Medialab, 2013. http://dx.doi.org/10.22323/1.188.0002.

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Dreyer, Lente y Markus Böttcher. "Gamma-Gamma Absorption in Gamma-Ray Burst Environments". En 4th Annual Conference on High Energy Astrophysics in Southern Africa. Trieste, Italy: Sissa Medialab, 2017. http://dx.doi.org/10.22323/1.275.0005.

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Seino, Yoshiaki, H. Miyata y Kiyoshi Hayasaka. "Analysis of $\gamma \gamma$ to $J/\psi \gamma$". En XIV International Conference on Heavy Quarks and Leptons. Trieste, Italy: Sissa Medialab, 2018. http://dx.doi.org/10.22323/1.332.0041.

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7

du Ploy, Drikus y Brian van Soelen. "Gamma-gamma absorption in gamma-ray binary systems". En 7th Annual Conference on High Energy Astrophysics in Southern Africa. Trieste, Italy: Sissa Medialab, 2020. http://dx.doi.org/10.22323/1.371.0054.

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Klusek-Gawenda, Mariola. "$\gamma \gamma \to \gamma \gamma$ in heavy ion collisions -- new results and prospects". En 40th International Conference on High Energy physics. Trieste, Italy: Sissa Medialab, 2021. http://dx.doi.org/10.22323/1.390.0329.

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Jalali, Majid. "Measurement and Calculation of Gamma Radiation from HWZPR Reactor". En 14th International Conference on Nuclear Engineering. ASMEDC, 2006. http://dx.doi.org/10.1115/icone14-89091.

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HWZPR is a research reactor with natural uranium fuel, D2O moderator and graphite reflector with maximum power of 100 W. It is a suitable means for theoretical research and heavy water reactor experiments. Neutrons from the core participate in different nuclear reactions by interactions with fuel, moderator, graphite and the concrete around the reactor. The results of these interactions are the production of prompt gammas in the environment. Useful information is gained by the reactor gamma spectrum measurement from point of view of relative quantity and energy distribution of direct and scattered radiations. Reactor gamma ray spectrum has been gathered in different places around the reactor by HPGe detector. In analysis of these spectra, 1H(n,γ)2H, 16O(n,n′γ)16O, 2H(n,γ)3H and 238U(n,γ)239U reactions occurring in reactor moderator and fuel, are important. The measured spectrum has been primarily estimated by the MCNP code. There is agreement between the code and the experiments in some points. The scattered gamma rays from 27Al (n,γ)28Al reaction in the reactor tank, are the most among the gammas scattered in the reactor environment. Also the dose calculations by MCNP code show that 72% of gamma dose belongs to the energy range 3–11 MeV from reactor gamma spectrum and the danger of exposure from the reactor high-energy photons is serious.
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Malgeri, Luca. "Total gamma-gamma cross sections". En International Europhysics Conference on High Energy Physics. Trieste, Italy: Sissa Medialab, 2001. http://dx.doi.org/10.22323/1.007.0040.

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Informes sobre el tema "Gamma"

1

Kim, K. J. y A. Sessler. Gamma-gamma colliders. Office of Scientific and Technical Information (OSTI), junio de 1996. http://dx.doi.org/10.2172/378863.

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2

Simakov, S. Evaluation of the Prompt Gamma-ray Spectrum from Spontaneous Fission of 252Cf. IAEA Nuclear Data Section, febrero de 2024. http://dx.doi.org/10.61092/iaea.bz1p-e3yc.

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The energy spectra, multiplicities and average energies of the prompt, total and delayed γ-rays accompanying the spontaneous fission of 252Cf were collected from the literature and dedicated databases. They were carefully analysed for consistency with a view to producing reference data for usage in various applications. This could be accomplished for the prompt fission gamma ray spectrum up to 20 MeV since dozens of measurements exist and reasonably agree. The prompt fission gamma ray spectrum (PFGS) was non-model evaluated by fitting the preselected experimental data with the help of the generalized least-squares (GLS) code GMA. The resulting spectrum could be considered as a reference for the γ-ray energies from 0.1 to 20 MeV with uncertainties varying between ≈ 3 and 25%. This reference gamma spectrum will be a substantial contribution to the precise and complete characterisation of the 252Cf source since the prompt fission neutron spectrum (PFNS), which has been accepted as a standard for a long time, has comparable uncertainties. The average gamma multiplicity and energy were also surveyed and used to derive the recommended values. The prompt X- and γ-ray energy spectra below ≈ 100 keV and delayed photon spectra in the whole energy range, as well as their multiplicities, are still seldomly and incompletely measured, that excepts an evaluation based on experimental data. The comparison with existing theoretical prompt and delayed 252Cf(s.f.) γ-spectra or with those presented in the major evaluated cross section libraries explored their incompleteness or deviations from the evaluated PFGS. The existing measurements of the pionic and muonic radioactivity of 252Cf(s.f.) and 235U(nth,f) were reviewed and the potential impact of gammas from the π0 decay on the high energy part of the PFGS was investigated.
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3

Petriello, Frank J. Indirect Signatures of CP Violation in the Processes {gamma}{gamma} {yields} {gamma}{gamma}, {gamma}Z, and ZZ. Office of Scientific and Technical Information (OSTI), julio de 2001. http://dx.doi.org/10.2172/784975.

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Petriello, Frank J. Indirect Signatures of CP Violation in the Processes gamma gamma -> gamma gamma, gamma Z, and ZZ. Office of Scientific and Technical Information (OSTI), septiembre de 2002. http://dx.doi.org/10.2172/801770.

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James, Michael, Melissa Boswell y Matthew Gooden. LANL Countroom Gamma-Gamma Coincidence Capabilities. Office of Scientific and Technical Information (OSTI), diciembre de 2021. http://dx.doi.org/10.2172/1835753.

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Davoudiasl, H. Signatures of extra dimensions at e{gamma} and {gamma}{gamma} colliders. Office of Scientific and Technical Information (OSTI), enero de 2000. http://dx.doi.org/10.2172/753275.

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Davoudiasl, Hooman. {gamma}{gamma} {r_arrow} {gamma}{gamma} as a Test of Weak Scale Quantum Gravity at the NLC. Office of Scientific and Technical Information (OSTI), abril de 1999. http://dx.doi.org/10.2172/10057.

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Hill, T. S. NLC Gamma-Gamma Beam Dump Face Calculations. Office of Scientific and Technical Information (OSTI), junio de 2002. http://dx.doi.org/10.2172/15004659.

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Albert, J. Measurement of gamma and 2 beta + gamma. Office of Scientific and Technical Information (OSTI), enero de 2005. http://dx.doi.org/10.2172/839725.

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10

Engle, Robert y Joshua Rosenberg. GARCH Gamma. Cambridge, MA: National Bureau of Economic Research, mayo de 1995. http://dx.doi.org/10.3386/w5128.

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