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    Wyświetlanie 1-10 z 10
    Tytuł:
    Cosmic future of nuclear and particle physics
    Autorzy:
    Wrochna, G.
    Powiązania:
    https://bibliotekanauki.pl/articles/147930.pdf
    Data publikacji:
    2005
    Wydawca:
    Instytut Chemii i Techniki Jądrowej
    Tematy:
    astronomy
    nuclear physics
    particle physics
    astroparticle physics
    Opis:
    Abstract Astronomy and nuclear or particle physics are often considered as two opposite extremes, but in fact their common part is not empty and still enlarging. In this brief review we trace their common roots and we look for their common future. We predict that soon they will de facto merge in terms of phenomena being studied, theories used to describe them as well as experimental techniques. We gave several examples, devoting special attention to the "Pi of the Sky" project searching for optical flashes of astrophysical origin.
    Źródło:
    Nukleonika; 2005, 50,suppl.3; 25-31
    0029-5922
    1508-5791
    Pojawia się w:
    Nukleonika
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Causation in different scientific disciplines: A comparison of standards in occupational medicine and particle physics
    Autorzy:
    Dale, Jack R.
    Powiązania:
    https://bibliotekanauki.pl/articles/23388841.pdf
    Data publikacji:
    2023-11-14
    Wydawca:
    Instytut Medycyny Pracy im. prof. dra Jerzego Nofera w Łodzi
    Tematy:
    occupational medicine
    evidence-based medicine
    causation
    particle physics
    levels of evidence
    Bradford Hill criteria
    Opis:
    Occupational medical research involves the collection and analysis of data to draw conclusions about the causes and prevention of workplace injuries and diseases. However, there has been criticism that some studies lack rigour in determining causation. This article examines the similarities and differences between occupational medical research and particle physics in terms of their approach to hypothesis testing, statistical methods, and confounder control. The article also explores the use of criteria such as the Bradford Hill criteria to determine causation in occupational medical research. While particle physics is often viewed as a highly rigorous science, occupational medical research also employs rigorous scientific methods to ensure findings are accurate and reliable. However, there is room for improvement in determining causation in occupational medical research, particularly in the use of criteria such as the Bradford Hill criteria to guide the development of more robust studies. It is essential for occupational medical research to adhere to rigorous scientific methods to deliver findings that can help reduce workplace injuries and diseases. The use of criteria such as the Bradford Hill criteria can ensure that the conclusions drawn.
    Źródło:
    Medycyna Pracy. Workers’ Health and Safety; 2023, 74, 4; 333-339
    0465-5893
    2353-1339
    Pojawia się w:
    Medycyna Pracy. Workers’ Health and Safety
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Stable Bose-Einstein correlations
    Autorzy:
    Csörgo, T.
    Hegyi, S.
    Zajc, W.
    Powiązania:
    https://bibliotekanauki.pl/articles/147334.pdf
    Data publikacji:
    2004
    Wydawca:
    Instytut Chemii i Techniki Jądrowej
    Tematy:
    particle correlations
    Bose-Einstein correlations
    HBT
    Lévy distributions
    multiparticle production in high energy particle and nuclear physics
    Opis:
    The shape of Bose-Einstein (or HBT) correlation functions is determined for the case when particles are emitted from a stable source, obtained after convolutions of large number of elementary random processes. The two-particle correlation function is shown to have a stretched exponential shape, characterized by the Lévy index of stability 0 < alfa less-than or equal to 2 and the scale parameter R. The normal, Gaussian shape corresponds to a particular case, when alfa = 2 is selected. The asymmetry parameter of the stable source, beta is shown to be proportional to the angle, measured by the normalized three-particle cumulant correlations.
    Źródło:
    Nukleonika; 2004, 49,suppl.2; 7-10
    0029-5922
    1508-5791
    Pojawia się w:
    Nukleonika
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Wave-particle duality of a 6D wavicle in two paired 4D dual reciprocal quasispaces of a heterogeneous 8D quasispatial structure
    Autorzy:
    Czajko, Jakub
    Powiązania:
    https://bibliotekanauki.pl/articles/1062921.pdf
    Data publikacji:
    2019
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Wave-particle duality
    multispatial mathematical reality of physics
    wavicle
    Opis:
    According to Louis de Broglie, wave-particle duality can imply presence of a single entity also known as wavicle. Hence, instead of the double solution he proposed to explain the duality, I depict the 6D wavicle in a multispatial mathematical entity represented in two 4D quasigeometric heterogeneous structures comprising two paired 3D dual reciprocal spaces, one of which represents the particle and the other the wave that was supposed to guide the particle in his pilot wave theory. The operational nature of the (2⨯4)D = 8D biquaternionic quasigeometric structure of the wavicle is synthesized from twin operations performed over paired 3D homogeneous dual reciprocal spaces, each of which is immersed in a pair of two 4D asymmetrically overlapping heterogeneous quasigeometric (3+1)D = 4D spatial structures.
    Źródło:
    World Scientific News; 2019, 127, 1; 1-55
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    ARIES 2018 : infrastructure, innovation, outreach
    Autorzy:
    Romaniuk, Ryszard S.
    Powiązania:
    https://bibliotekanauki.pl/articles/226770.pdf
    Data publikacji:
    2019
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    particle accelerators
    accelerator science and technology
    novel accelerators
    high field magnets
    superconducting magnets
    RF particle guns
    particle detectors
    high energy physics
    applications of particle accelerators
    laser and plasma accelerators
    community and social implications of ARIES
    EC Integrating Introduction
    Opis:
    This article has two outreach aims. It concisely summarizes the main research and technical efforts in the EC H2020 ARIES Integrating Activity – Accelerator Research and Innovation for European Science and Society [1] during the period 2017/2018. ARIES is a continuation of CARE, TIARA and EuCARD projects [2-3]. The article also tries to show these results as an encouragement for local physics and engineering, research and technical communities to participate actively in such important European projects. According to the author’s opinion this participation may be much bigger [4-27]. All the needed components to participate – human, material and infrastructural are there [4,7]. So why the results are not satisfying as they should be? The major research subjects of ARIES are: new methods of particles acceleration including laser, plasma and particle beam interactions, new materials and accelerator components, building new generations of accelerators, energy efficiency and management of large accelerator systems, innovative superconducting magnets, high field and ultra-high gradient magnets, cost lowering, system miniaturization, promotion of innovation originating from accelerator research, industrial applications, and societal implications. Two institutions from Poland participate in ARIES – these are Warsaw University of Technology and Institute of Nuclear Chemistry and Technology in Warsaw. There are not present some of the key institutes active in accelerator technology in Poland. Let this article be a small contribution why Poland, a country of such big research potential, contributes so modestly to the European accelerator infrastructural projects? The article bases on public and internal documents of ARIES project, including the EU Grant Agreement and P1 report. The views presented in the paper are only by the author and not necessarily by the ARIES.
    Źródło:
    International Journal of Electronics and Telecommunications; 2019, 65, 1; 119-124
    2300-1933
    Pojawia się w:
    International Journal of Electronics and Telecommunications
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The Bose-Einstein statistics: Remarks on Debye, Natanson, and Ehrenfest contributions and the emergence of indistinguishability principle for quantum particles
    Autorzy:
    Spałek, Józef
    Powiązania:
    https://bibliotekanauki.pl/articles/783376.pdf
    Data publikacji:
    2020
    Wydawca:
    Polska Akademia Umiejętności
    Tematy:
    black body radiation, Planck’s law of radiation, particle indistinguishability, quantum statistical physics, Natanson statistics, Bose-Einstein statistics
    promieniowanie ciała doskonale czarnego, rozkład Plancka dla promieniowania, nierozróżnialność cząstek, kwantowa fizyka statystyczna, statystyka Natansona, statystyka Bosego-Einsteina
    Opis:
    The principal mathematical idea behind the statistical properties of black-body radiation (photons) was introduced already by L. Boltzmann (1877/2015) and used by M. Planck (1900; 1906) to derive the frequency distribution of radiation (Planck’s law) when its discrete (quantum) structure was additionally added to the reasoning.The fundamental physical idea – the principle of indistinguishability of the quanta (photons) – had been somewhat hidden behind the formalism and evolved slowly.Here the role of P. Debye (1910), H. Kamerlingh Onnes and P. Ehrenfest (1914) is briefly elaborated and the crucial role of W. Natanson (1911a; 1911b; 1913) is emphasized.The reintroduction of this Natanson’s statistics by S. N. Bose (1924/2009) for light quanta (called photons since the late 1920s), and its subsequent generalization to material particles by A. Einstein (1924; 1925) is regarded as the most direct and transparent, but involves the concept of grand canonical ensemble of J. W. Gibbs (1902/1981), which in a way obscures the indistinguishability of the particles involved.It was ingeniously reintroduced by P. A. M. Dirac (1926) via postulating (imposing) the transposition symmetry onto the many-particle wave function.The above statements are discussed in this paper, including the recent idea of the author (Spałek 2020) of transformation (transmutation) – under specific conditions – of the indistinguishable particles into the corresponding to them distinguishable quantum particles.The last remark may serve as a form of the author’s post scriptum to the indistinguishability principle.
    Zasadnicza idea matematyczna opisu własności statystycznych promieniowania ciała doskonale czarnego (fotonów) wprowadzona została już przez L. Boltzmanna (1877/2015) i użyta przez M. Plancka (1900; 1906) do uzasadnienia wyprowadzenia rozkładu po częstościach dla tego promieniowania (prawo Plancka), jeśli jego dyskretna (kwantowa) struktura została dodatkowo dodana do tego rozumowania.Fundamentalna idea fizyczna – zasada nierozróżnialności kwantów (fotonów) jest w pewnym stopniu ukryta w tym formalizmie i ewoluowała powoli.Tutaj omawiamy krótko rolę P. Debye’a (1910), H. Kamerlingha Onnesa i P. Ehrenfesta (1914), a przede wszystkim podkreślamy zasadniczy wkład W. Natansona (1911a; 1911b; 1913).Ponowne wprowadzenie tej statystyki przez S. N. Bosego (1924/2009) dla kwantów światła (zwanych fotonami od końca lat dwudziestych XX wieku) i następującej po niej statystyki A. Einsteina (1924,1925) dla cząstek materialnych jest uważane za najbardziej bezpośrednie i przejrzyste, ale zawiera koncepcje dużego rozkładu kanonicznego J. W. Gibbsa (1902/1981) i do pewnego stopnia przesłania także zasadę nierozróżnialności cząstek.Tę zasadę wprowadził ponownie w sposób genialny P. A. M. Dirac (1926), włączając (narzucając) symetrię względem przestawień pary współrzędnych cząstek (inwersji) w wielocząstkowej funkcji falowej.Powyższe stwierdzenia są przedyskutowane w tej pracy, włącznie z niedawno sformułowaną ideą autora (Spałek 2020) przekształcenia (transmutacji) – w specyficznych warunkach – cząstek nierozróżnialnych w korespondujące z nimi, rozróżnialne cząstki.Ta ostatnia uwaga ma służyć jako post scriptum autora do zasady nierozróżnialności.
    Źródło:
    Studia Historiae Scientiarum; 2020, 19
    2451-3202
    Pojawia się w:
    Studia Historiae Scientiarum
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Evolutionary Algorithm for Particle Trajectory Reconstruction within Inhomogeneous Magnetic Field in the NA61/SHINE Experiment at CERN SPS
    Autorzy:
    Wyszyński, Oskar
    Powiązania:
    https://bibliotekanauki.pl/articles/1373697.pdf
    Data publikacji:
    2015
    Wydawca:
    Uniwersytet Jagielloński. Wydawnictwo Uniwersytetu Jagiellońskiego
    Tematy:
    tracking
    event
    reconstruction
    particle
    high
    energy
    physics
    HEP
    NA61
    SHINE
    CERN
    TPC
    magnetic
    field
    CMA
    evolutionary
    strategy
    bayes
    generative
    discriminative
    Opis:
    In this paper, a novel probabilistic tracking method is proposed. It combines two competing models: (i) a discriminative one for background classification; and (ii) a generative one as a track model. The model competition, along with a combinatorial data association, shows good signal and background noise separation. Furthermore, a stochastic and derivative-free method is used for parameter optimization by means of the Covariance Matrix Adaptation Evolutionary Strategy (CMA-ES). Finally, the applicability and performance of the particle trajectories reconstruction are shown. The algorithm is developed for NA61/SHINE data reconstruction purpose and therefore the method was tested on simulation data of the NA61/SHINE experiment.
    Źródło:
    Schedae Informaticae; 2015, 24; 159-177
    0860-0295
    2083-8476
    Pojawia się w:
    Schedae Informaticae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    EuCARD 2010 Accelerator Technology in Europe
    Autorzy:
    Romaniuk, R. S.
    Powiązania:
    https://bibliotekanauki.pl/articles/226754.pdf
    Data publikacji:
    2010
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    RF
    SRF
    superconducting RF
    electronic systems
    particle accelerators
    FEL lasers
    photon physics
    photonics
    elementary particles
    large research infrastructures in Europe
    European research projects
    Opis:
    Accelerators are basic tools of the experimental physics of elementary particles, nuclear physics, light sources of the fourth generation. They are also used in myriad other applications in research, industry and medicine. For example, there are intensely developed transmutation techniques for nuclear waste from nuclear power and atomic industries. The European Union invests in the development of accelerator infrastructures inside the framework programs to build the European Research Area. The aim is to build new infrastructure, develop the existing, and generally make the infrastructure available to competent users. The paper summarizes the first year of activities of the EU FP7 Project Capacities EuCARD - European Coordination of Accelerator R&D. Several teams from this country participate actively in this project. The contribution from Polish research teams concerns: photonic and electronic measurement - control systems, RF-gun co-design, thin-film superconducting technology, superconducting transport infrastructures, photon and particle beam measurements and control.
    Źródło:
    International Journal of Electronics and Telecommunications; 2010, 56, 4; 485-488
    2300-1933
    Pojawia się w:
    International Journal of Electronics and Telecommunications
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Compact Muon Solenoid Decade Perspective and Local Implications
    Autorzy:
    Romaniuk, R. S.
    Powiązania:
    https://bibliotekanauki.pl/articles/226356.pdf
    Data publikacji:
    2014
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    CMS
    LHC
    CERN
    HEP
    accelerators
    particle
    detectors
    high energy physics experiments
    Higgs boson
    electronics for HEP
    photonics for HEP
    LHC experiments
    CMS experiment
    compact muon solenoid
    Opis:
    The Compact Muon Solenoid CMS is one of the major detectors of the LHC Large Hadron Collider accelerator. The second, a competitive brother, is Atlas. The accelerator complex in CERN was shut down for two years, after two years of exploitation, and will resume its work in 2015. During this break, called long shutdown LS1 a number of complex components, including electronics and photonics, will be intensely refurbished. Not only the LHC itself but also the booster components and detectors. In particular, the beam luminosity will be doubled, as well as the colliding beam energy. This means tenfold increase in the integrated luminosity over a year to 250fb⁻¹y. Discovery potential will be increased. This potential will be used for subsequent two years, with essentially no breaks, till the LS2 in 2017. The paper presents an introduction to the research area of the LHC and chosen aspects of the CMS detector modernization. The Warsaw CMS Group is involved in CMS construction, commissioning, maintenance and refurbishment, in particular for algorithms and hardware of the muon trigger. The Group consists of members form the following local research institutions, academic and governmental: IFD-UW, NCBJ- Świerk and ISE-WEITI-PW.
    Źródło:
    International Journal of Electronics and Telecommunications; 2014, 60, 1; 89-94
    2300-1933
    Pojawia się w:
    International Journal of Electronics and Telecommunications
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    International Linear Collider Global and Local Implications
    Autorzy:
    Romaniuk, R. S.
    Powiązania:
    https://bibliotekanauki.pl/articles/226596.pdf
    Data publikacji:
    2014
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    ILC
    ILC-GDE
    LCC
    SRF
    accelerators
    particle colliders
    linacs
    superconductivity
    high energy physics experiments
    elementary particles
    hadrons
    electron beams
    positron beams
    microwave resonant cavities
    high power 1,3 GHz systems
    superconducting RF electronics
    Opis:
    ILC machine–International Liner Collider, is one of two accelerators e+e-just under design and advanced consideration to be built with final energy of colliding electron and positron beams over 1 TeV. An alternative project to ILC is CLIC in CERN The ILC machine is an important complementary addition for the research potential of the LHC accelerator complex. The required length of ILC is minimally 30 km, but some versions of the TDR estimates mention nearly 50km. Superconducting RF linacs will be built using well established 1,3 GHz TESLA technology using ultrapure niobium or Nb3Sn resonant microwave cavities of RRR class, of ultimate finesse, working with gradients over 35MV/m, while some versions of the design mention ultimate confinement as high as 50MV/m. Several teams from Poland (Kraków. Warszawa, Wrocław – IFJ-PAN, AGH, UJ, NCBJ, UW, PW, PWr, INT-PAN) participate in the global design effort for this machine – including detectors, cryogenics, and SRF systems. Now it seems that the ILC machine will be built in Japan, during the period of 2016-2026. If true, Japan will turn to a world super-power in accelerator technology no.3 after CERN and USA. The paper summarizes the state-of-the-art of technical and administration activities around the immense ILC and CLIC machines, with emphasis on potential participation of Polish teams in the global effort of newly established LCC –The Linear Collider Consortium.
    Źródło:
    International Journal of Electronics and Telecommunications; 2014, 60, 2; 181-185
    2300-1933
    Pojawia się w:
    International Journal of Electronics and Telecommunications
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-10 z 10

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