| 1. |
- Bernhoff, Niclas, 1971-
(författare)
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On half-space problems for the discrete Boltzmann equation
- 2010
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Ingår i: Il Nuovo Cimento C. - Bologna : Società Italiana di Fisica. - 2037-4909 .- 1826-9885. ; 33:1, s. 47-54
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Tidskriftsartikel (refereegranskat)abstract
- We study typical half-space problems of rarefied gas dynamics, including the problems of Milne and Kramer, for the discrete Boltzmann equation (a general discrete velocity model, DVM, with an arbitrary finite number of velocities). Then the discrete Boltzmann equation reduces to a system of ODEs. The data for the outgoing particles at the boundary are assigned, possibly linearly depending on the data for the incoming particles. A classification of well-posed half-space problems for the homogeneous, as well as the inhomogeneous, linearized discrete Boltzmann equation is made. In the non-linear case the solutions are assumed to tend to an assigned Maxwellian at infinity. The conditions on the data at the boundary needed for the existence of a unique (in a neighborhood of the assigned Maxwellian) solution of the problem are investigated. In the non-degenerate case (corresponding, in the continuous case, to the case when the Mach number at the Maxwellian at infinity is different of -1, 0 and 1) implicit conditions are found. Furthermore, under certain assumptions explicit conditions are found, both in the non-degenerate and degenerate cases. An application to axially symmetric models is also studied
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| 2. |
- Buoninfante, Luca, 1992-, et al.
(författare)
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Quantum gravity, higher derivatives and nonlocality
- 2022
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Ingår i: NUOVO CIMENTO C-COLLOQUIA AND COMMUNICATIONS IN PHYSICS. - : SOC ITALIANA FISICA. - 2037-4909 .- 1826-9885. ; 45:2
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Tidskriftsartikel (refereegranskat)abstract
- The aim of the workshop Quantum Gravity, Higher Derivatives & Nonlocality (QGRAV-2021) was to assess our current understanding of the interplay between gravity and quantum mechanics, with particular attention to what is the main role of higher derivatives and nonlocality in the formulation of a consistent theory of quantum gravity, and whether they are really necessary to describe Nature at a fundamental level. The workshop had brought together various schools of thought, and besides talks numerous discussions were also held. In addition to focusing on formal aspects of several approaches, applications of higher derivatives arid non locality were also discussed in the context of cosmology and black-hole physics. In this preface article we present a concise explanation of the main problems underlying the quantization of gravity in the high-energy regime, briefly list several approaches that have been proposed so far, and also provide a gist of what was intensively discussed during the workshop.
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| 3. |
- Jeskova, Zuzana, et al.
(författare)
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In-service and pre-service teacher education in IBSE : The ESTABLISH approach
- 2015
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Ingår i: Nuovo Cimento C. - : Soc Italiana Fisica. - 2037-4909. ; 3
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Tidskriftsartikel (refereegranskat)abstract
- One of the main goals of the ESTABLISH 7fp project (available on line at http://www.establish-fp7.eu/) was the development and implementation of the professional development teacher education programmes (TEP) to support teachers in adopting inquiry-based strategies in their teaching. Within the project there was a model for in-service and pre-service teacher training in IBSE designed and implemented across 12 participating countries. The programme is based on 4 core elements and 4 additional elements that are built around the IBSE teaching units developed within the project. As accepted by ESTABLISH partners, all teacher training programmes include the minimum of the four elements, i.e. introduction to IBSE, industrial content knowledge, teacher as implementer and teacher as developer of IBSE teaching materials. There are also four additional elements designed in detail, i.e. ICT for IBSE, argumentation in the classroom, research and design projects for students, assessment of IBSE. These can be added to the programme optionally with regard to the level of teachers' IBSE skills and current situation in education and teachers' professional development within the country. This ESTABLISH model of TEP was followed in participating countries in order to change teachers' attitudes from traditional ways of teaching towards adopting inquiry strategies and their successful implementation in the classroom. Within the face-to-face workshops teachers experienced and developed their inquiry based teaching strategies using specifically developed materials. In addition, the e-platform has been developed to provide on-line support. This platform provides educators and teachers with all the necessary materials for the training and IBSE teaching units and other teaching materials for teachers' ongoing help. The teacher training programme was successfully implemented in Slovakia. There were two runs of teacher training workshops on IBSE already carried out. Moreover, the additional element ICT in IBSE was developed more deeply designing a separate teacher training course for it. The contribution discusses in more details the success and problems of implementation in the context of Slovak educational environment.
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| 4. |
- Pieramico, G., et al.
(författare)
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Geant4 simulation of the ABALONE photosensor
- 2022
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Ingår i: Il Nuovo Cimento. - 2037-4909 .- 1826-9885. ; 45:1
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Tidskriftsartikel (refereegranskat)abstract
- The ABALONE is a new type of photosensor produced by PhotonLab, Inc. with cost effective mass production, robustness and high performance. This modern technology provides sensitivity to visible and UV light, exceptional radio-purity and excellent detection performance in terms of intrinsic gain, afterpulsing rate, timing resolution and single-photon sensitivity. The ABALONE is based on the acceleration of photoelectrons in vacuum. These are generated in a traditional photocathode and guided towards a window of scintillating material. The resulting scintillation light can be read from the outside via a silicon photomultiplier (SiPM). The device has been proposed as a possible candidate for the DARWIN experiment. We performed the complete simulation of the detector, mapped the electrostatic field within the vacuum of the sensor and studied its possible optimization.
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| 5. |
- Spartà, R., et al.
(författare)
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8B reaction dynamics researched at HIE-ISOLDE
- 2024
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Ingår i: Nuovo Cimento della Societa Italiana di Fisica C. - 2037-4909 .- 1826-9885. ; 47:2
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Tidskriftsartikel (refereegranskat)abstract
- For the first time a measurement of 8B + 64Zn reaction has been performed at HIE-ISOLDE at CERN at energies around the Coulomb barrier, to understand how the debated halo structure of the light nucleus can affect reaction dynamics.
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| 6. |
- Zema, Vanessa, 1991, et al.
(författare)
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Cosinus: A NaI-based cryogenic calorimeter for direct dark matter search
- 2019
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Ingår i: Nuovo Cimento della Societa Italiana di Fisica C. - 2037-4909 .- 1826-9885. ; 42:5
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Tidskriftsartikel (refereegranskat)abstract
- For two decades, extraordinary effort has been devoted to clarifying the controversial results in direct dark matter detection. The claim of DAMA/LIBRA for a dark matter annual modulation signal is in apparent contradiction with most of the results of the other direct detection experiments, but a material-independent check of this signal can still be decisive. For this reason, COSINUS aims to develop a sodium iodide-based cryogenic scintillating calorimeter, whose two-channel readout of light and phonon allows an event-by-event discrimination of the dominant β/γ-background from the sought-for nuclear recoils.
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| 7. |
- Alvarado, F., et al.
(författare)
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Electroweak structure of the nucleon
- 2024
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Ingår i: Nuovo cimento della societa italiana de fisica. C, Geophysics and space physics. - : SOCIETÀ ITALIANA DI FISICA. - 1124-1896 .- 1826-9885. ; 47:4
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Tidskriftsartikel (refereegranskat)abstract
- The nucleon form factors (FFs) are studied in relativistic chiral perturbation theory (ChPT) in two flavors with explicit Δ(1232) degrees of freedom. For the electromagnetic isovector form factors we also employ dispersion theory to account for ρ-dominated isovector ππ interaction and its quark-mass dependence in the t -channel nonperturbatively and beyond NLO in ChPT. With this framework we explore how LQCD data are described in both the Q2 and Mπ dimensions simultaneously. Furthermore, we have performed an NNLO calculation of the nucleon axial form factor, extracting relevant low -energy constants (LECs) from a combined set of recent LQCD results from different collaborations.
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| 8. |
- Amoroso, A., et al.
(författare)
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A cylindrical GEM Inner Tracker for the BESIII experiment
- 2016
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Ingår i: Nuovo cimento della societa italiana de fisica. C, Geophysics and space physics. - 1124-1896 .- 1826-9885. ; 39:1
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Tidskriftsartikel (refereegranskat)abstract
- We are developing a cylindrical GEM detector with analog readout to upgrade the Inner Tracker of the BESIII experiment at IHEP (Beijing). The new detector will match the requirements for momentum resolution (sigma(pt)/pt similar to 0.5% at 1GeV) and radial resolution (sigma(xy) similar to 100 mu m) of the existing drift chamber and will improve significantly the spatial resolution along the beam direction (sigma(z) similar to 150 mu m) with very small material budget (about 1% of X-0). A beam test has been performed at CERN in order to measure the performance of a BESIII GEM prototype in a magnetic field up to 1 tesla. An overview of the project and the preliminary results of the test will be presented in the talk. The project has been recognised as a Significant Research Project within the Executive Programme for Scientific and Technological Cooperation between Italy and PRC for the years 2013-2015, and more recently has been selected as one of the project funded by the European Commission within the call H2020-MSCA-RISE-2014.
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| 9. |
- An, Di
(författare)
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Dispersive calculation for N*(1520) transition form factors at low energies
- 2024
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Ingår i: Nuovo cimento della societa italiana de fisica. C, Geophysics and space physics. - : Società Italiana di Fisica. - 1124-1896 .- 1826-9885. ; 47:4
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Tidskriftsartikel (refereegranskat)abstract
- The transition form factors of N*(1520) have been formulated and computed at low energies (|q2| < 1 GeV2) using dispersion theory for the first time. Utilizing hadronic data from N*(1520) -> N π, N*(1520) -> Δπ, and N*(1520) -> N ρ processes, we have calculated both space-like and time-like transition form factors. Our results demonstrate agreement with the existing space-like form factor data. The predicted time-like form factors can be experimentally tested by the HADES experiment.
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| 10. |
- Bagoly, Zsolt, et al.
(författare)
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Principal Component Analysis of Gamma-Ray Bursts' Spectra
- 2005
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Ingår i: Nuovo Cimento C. ; 28:3, s. 295-298
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Tidskriftsartikel (refereegranskat)abstract
- The origin of dark bursts--i.e. that have no observed afterglows in X-ray, optical/NIR and radio ranges--is unclear yet. Different possibilities--instrumental biases, very high redshifts, extinction in the host galaxies--are discussed and shown to be important. On the other hand, the dark bursts should not form a new subgroup of long gamma-ray bursts themselves.
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