Informacja

Drogi użytkowniku, aplikacja do prawidłowego działania wymaga obsługi JavaScript. Proszę włącz obsługę JavaScript w Twojej przeglądarce.

English (EN)·Polski (PL)·Yкраїнський (UK)
Przejdź do strony domowej biblioteki Centralna Biblioteka Wojskowa Link otwiera się w nowym oknie Logo biblioteki Prolib Integro - strona głównaCentralna Biblioteka Wojskowa

Wyszukujesz frazę "black-hole" wg kryterium: Wszystkie pola

  Lista filtrów
Wyrównaj
    Wyświetlanie 1-13 z 13
    Tytuł:
    Stability of Reissner-Nordström Black Hole
    Autorzy:
    Nashed, G. G. L.
    Powiązania:
    https://bibliotekanauki.pl/articles/2047354.pdf
    Data publikacji:
    2007-07
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    04.20.Cv
    04.50.+h
    04.20.-q
    Opis:
    The singularity of the solutions obtained before in the teleparallel theory of gravitation is studied. Also the stability of these solutions is studied using the equations of geodesic deviation. The condition of stability is obtained. From this condition the stability of the Schwarzschild solution can be obtained.
    Źródło:
    Acta Physica Polonica A; 2007, 112, 1; 13-21
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Correction to the Higher Dimensional Black Hole Entropy
    Autorzy:
    Farmany, A.
    Abbasi, S.
    Naghipour, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/1812029.pdf
    Data publikacji:
    2008-10
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    04.60.-m
    04.70.-s
    04.70.Dy
    03.65.Ud
    Opis:
    Using the modified Hawking radiation of a Schwarzschild black hole (based on the generalized uncertainty principle) we obtained the Bekenstein-Hawking entropy of a higher dimensional Schwarzschild black hole. Furthermore, the thermodynamics of such black hole is studied.
    Źródło:
    Acta Physica Polonica A; 2008, 114, 4; 651-655
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    On the Mathematical Analysis of Black-Hole Information Loss Paradox
    Autorzy:
    Vishal, V.
    Siddharth, B.
    Venkatachalam, C.
    Powiązania:
    https://bibliotekanauki.pl/articles/411529.pdf
    Data publikacji:
    2013
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    black hole
    Information paradox
    AdS/CFT correspondence
    quantum field theory
    Opis:
    A black-hole is an astronomical entity which possesses infinite density at its gravitational singularity or singular point. The capacity of a black-hole to completely rip-off an entire solar system without leaving any evidence is to be noted. A debate has been going on over the past few decades regarding the information storage in black-holes. The discovery of Hawking radiation, which predicts complete evaporation of mass violates unitarity ie. Conservation of probability and energy fails. Recent discoveries suggest that regular remnant of black-hole survives evaporation , as a result information of the object devoured can be contained. These remnants are grouped into embedded sub-manifolds. These manifolds are the result of a five-dimensional constant curvature bulk in space-time. Five-dimensional gravity can be recovered from brane-world resulting from equations of bulk geometry. Gravity can be explained by space-time theory and also quantum theory in the form of Gravitons. On observing the manifold, the gravitons show deformations in dimensions, rather than being constant. The perturbations in geometry can be related to embedding functions which should remain differentiable and regular. Regularity is related to the inverse functions theorem. Manifold observations followed by a mathematical approach can possibly retain information about objects devoured by the black-hole.
    Źródło:
    International Letters of Chemistry, Physics and Astronomy; 2013, 13; 8-12
    2299-3843
    Pojawia się w:
    International Letters of Chemistry, Physics and Astronomy
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Some remarks on the first image of a black hole
    Autorzy:
    Szybka, Sebastian Jan
    Powiązania:
    https://bibliotekanauki.pl/articles/690750.pdf
    Data publikacji:
    2020
    Wydawca:
    Copernicus Center Press
    Tematy:
    black holes
    event horizon
    general relativity
    interferometry
    astronomy
    Albert Einstein
    geometry
    Opis:
    On the 10th of April, 2019 the Event Horizon Telescope Collaboration presented the first image of the black hole. The image was obtained with a planet-scale array of eight ground-based radio telescopes. The observation relied on a technique called very long base interferometry which synchronises telescope facilities around the world. The image of a black hole together with the recent detections of gravitational waves confirms one of the most intriguing predictions of Einstein’s gravity theory, namely, the existence of black holes. I will provide more details on this remarkable observation and explore its consequences for our understanding of nature. The physical reality of black holes is strongly supported by recent advances of astronomy. I claim that this fact is the key to understanding the relation between our world and the world of mathematics.
    Źródło:
    Zagadnienia Filozoficzne w Nauce; 2020, 68; 281-294
    0867-8286
    2451-0602
    Pojawia się w:
    Zagadnienia Filozoficzne w Nauce
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Improved MCBDS for defending against gray hole and black hole attacks in MANETs
    Autorzy:
    Haghighi, A.
    Mizanian, K.
    Mirjalily, G.
    Powiązania:
    https://bibliotekanauki.pl/articles/102490.pdf
    Data publikacji:
    2016
    Wydawca:
    Stowarzyszenie Inżynierów i Techników Mechaników Polskich
    Tematy:
    mobile ad hoc network
    cooperative bait detection scheme (CBDS)
    modified CBDS (MCBDS)
    black hole
    gray hole
    MANET
    Opis:
    Mobile Ad-hoc Networks (MANETs) are widely used nowadays. Because of their characteristics as open media, dynamic topology, being infrastructure-less and lack of centralized monitoring, MANET is vulnerable to a wide range of attacks like blackhole and grayhole. Blackhole and grayhole attacks refer to the attacks that breach the security by performing packet forwarding and routing misbehavior and cause denial of service in MANETs. In this paper we improved our previous work on MCBDS, we reduced false-positive rate more than before and on average it dropped to zero. The proposed method employs Network Simulator-2 (NS-2) to validate the effectiveness under different scenarios. Simulation results show that improved MCBDS has same performance as CBDS in terms of throughput and end-to-end delay and as much as the presence of malicious nodes increased, improved MCBDS performs better than CBDS.
    Źródło:
    Advances in Science and Technology. Research Journal; 2016, 10, 30; 1-8
    2299-8624
    Pojawia się w:
    Advances in Science and Technology. Research Journal
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Is there a limit of matter divisibility?
    Autorzy:
    Jacyna-Onyszkiewicz, Zbigniew
    Powiązania:
    https://bibliotekanauki.pl/articles/703143.pdf
    Data publikacji:
    2007
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    black hole
    entropy
    holographic principle
    Opis:
    Investigation of the thermal properties of the black holes by the quantum statistical mechanics has implied that matter cannot be divided to infinity because the number of independent parameters completely describing a subject of a limited volume is finite.
    Źródło:
    Nauka; 2007, 3
    1231-8515
    Pojawia się w:
    Nauka
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Simulation of Primary Spectra of Particle Radiation from Black Holes
    Autorzy:
    Wijewardhana, C. N. T.
    Wijewardena Gamalath, K. A. I. L.
    Powiązania:
    https://bibliotekanauki.pl/articles/1193473.pdf
    Data publikacji:
    2021
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Hawking radiation
    Higgs boson emission
    Kerr black hole
    Planck mass
    Primary emission spectra
    Schwarzschild black hole
    W±
    Z0
    primordial black hole
    quark and gluon emission
    Opis:
    The instantaneous primary emission spectra of particles radiating from Schwarzschild black holes and maximally rotating Kerr black holes of masses 1013 – 1015 g were investigated and C code, BlackHawk was used for the simulations. From a Schwarzschild black hole of mass 3.53×1013 g, gluons had the lowest cutoff energy, 199 MeV. The emission spectra were dominated by coloured particles, quarks having with the highest overall emission rate, 2.826×1022 GeV-1s-1 at energy 1.205 GeV. The leptons e±, μ±, τ± showed similar variation in emission rates. The only particles emitted with energies below the rest mass of u quarks were neutrinos, photons, and e±. At greater particle energies (> ~ 2 GeV) the emission rates of all particles were almost equivalent. The emission of vector bosons, Z0 and W± were negligible and became significant when the mass reduced to ~1011 g and then gluons, W±, Z0 and photons were emitted similar to each other with a peak at energy, 280 GeV. The emitting rates of gluons, quarks, neutrinos, W±, e±, μ±, τ±, Z0, photons, and Higgs bosons are in decreasing order respectively. As the mass of the black hole is reduced to 1.06×108 g, quarks were emitted at the highest rate 2.826×1022 GeV-1s-1 at 4010 GeV peak energy and at energies between rest mass energy of Higgs boson and 1.25×105 GeV, the emission of Higgs bosons exceeded the emission of quarks. For maximally rotating Kerr black hole of mass 3.53×1013 g, W±, Z0 and Higgs boson were emitted at higher emission rates 1012 – 1015 GeV-1s-1 and for mass 1.06×108 g, the gluons had the highest overall emission rate at the peak energy. At extremely high energies, the gluon emission rates are less than the emission rates of Higgs bosons, quarks, neutrinos, and e±, μ±, τ±. The spin-dependent behaviour of spectra is also present.
    Źródło:
    World Scientific News; 2021, 158; 105-129
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Joint detection of gravitational waves from binary black hole and binary neutron star mergers by LIGO and Virgo
    Autorzy:
    Królak, Andrzej
    Patil, Mandar
    Powiązania:
    https://bibliotekanauki.pl/articles/690922.pdf
    Data publikacji:
    2018
    Wydawca:
    Copernicus Center Press
    Tematy:
    gravitational waves
    neutron stars
    black holes
    Opis:
    Advanced Virgo detector joined advanced LIGO twin detectors on 1st August 2017 in the quest to look for the gravitational waves. The global network of three detectors was operational for 25 days until the LIGO shut down on 25th August 2017. Two gravitational wave events were registered during this period. One of them was the binary black hole merger dubbed as GW170814 and other one is binary neutron star merger referred to as GW170817. Electromagnetic counterpart associated with binary neutron star merger was promptly identified which marks the beginning of multi-messenger astronomy. This article describes these events emphasizing on the crucial role played by the Virgo and focusing on some methodological issues.
    Źródło:
    Zagadnienia Filozoficzne w Nauce; 2018, 64; 95-115
    0867-8286
    2451-0602
    Pojawia się w:
    Zagadnienia Filozoficzne w Nauce
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Czarna dziura (Siergiej Lebiediew "Granica zapomnienia")
    THE BLACK HOLE (SERGEI LEBEDEV "OBLIVION")
    ЧЕРНАЯ ДЫРА (СЕРГЕЙ ЛЕБЕДЕВ "ПРЕДЕЛ ЗАБВЕНИЯ")
    Autorzy:
    ZYWERT, ALEKSANDRA MARIA
    Powiązania:
    https://bibliotekanauki.pl/articles/605175.pdf
    Data publikacji:
    2020
    Wydawca:
    Polskie Towarzystwo Rusycystyczne
    Tematy:
    Сергей Лебедев
    Предел забвения
    постпамять
    травма
    лагерь
    Siergiej Lebiediew
    Granica zapomnienia
    postpamięć
    trauma
    łagier
    Sergey Lebedev
    Oblivion
    post-memory
    labor camp
    Opis:
    Роман Сергея Лебедева Предел забвения (2010) вписывается в литературное направление (очень важное с точки зрения литературы постпамяти) т.н. семейного романа. На примере истории судьбы героя-рассказчика пытающегося раскыть настоящую тождественность своего «дедушки», Лебедев показывает, что «непроработанная» память – это темя все время живая, поскольку до сих пор в большинстве соременных русских семей промолчивается неудобные факты из биографий родственников (или даже вычеркивается их из генеалогии) во имя идущего сверху приказа табуизации ошибок и травм. Он указывает,что нажим на забвение содает в сознании молодого поколения дыру и одновременно укрепляет т.н. репресийное сознание. В этом контексте основной проблемой является вопрос о состоянии русского народа в ситуации сознательного вытеснения из сознания части собственной истории.
    Sergei Lebedev’s novel entitled Oblivion (Предел забвения, 2010) belongs to the (highly important in the context of the post-memory literature) tradition of the so-called generational novel. On the example of the character-narrator’s story full of struggling to learn the true identity of his “grandfather” Lebedev shows that difficult and unprocessed memory amounts to an important up-to-date problem. It is so because in most contemporary Russian families the inconvenient facts from the past remain unvoiced (or the infamous relatives disappear from the family tree) due to overwhelming tabooing of mistakes and traumas. It is indicated that the general approval (sometimes even emphasized) of oblivion creates a hole in the youngest generation’s consciousness and strengthens the so-called repressive awareness. In this context the state of the Russian nation in the face of the conscious suppression of elements of its own history becomes a major issue.
    Powieść Siergieja Lebiediewa Granica zapomnienia (Предел забвения, 2010) wpisuje się w nurt (niezwykle istotny z punktu widzenia literatury postpamięci) tzw. powieści rodzinnej/generacyjnej. Na przykładzie historii bohatera-narratora próbującego odkryć prawdziwą tożsamość przyszywanego dziadka, Lebiediew pokazuje, że trudna i nieprzepracowana pamięć - to temat wciąż żywy, bo nadal w większości współczesnych rodzin rosyjskich przemilcza się niewygodne fakty z biografii krewnych (bądź w ogóle usuwa się ich z genealogii) w imię odgórnego nakazu tabuizacji błędów i traum. Wskazuje, że odgórne przyzwolenie, a nawet opresyjny nacisk na niepamięć stwarza wyrwę w świadomości najmłodszego pokolenia i jednocześnie utrwala tzw. świadomość represyjną. w tym kontekście podstawowym problemem jest kondycja narodu rosyjskiego w obliczu świadomego wyparcia ze świadomości części własnej historii.
    Źródło:
    Przegląd Rusycystyczny; 2020, 3 (171)
    0137-298X
    Pojawia się w:
    Przegląd Rusycystyczny
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Simulation of Rotating Black Holes
    Autorzy:
    Vindana, W. M. H. P.
    Wijewardena Gamalath, K. A. I. L.
    Powiązania:
    https://bibliotekanauki.pl/articles/1158501.pdf
    Data publikacji:
    2018
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Hawking radiation
    Hawking temperature
    Kerr black hole
    Kerr-Newman black hole
    entropy
    mass variation
    rotating black holes
    thermodynamic parameters
    Opis:
    Considering the analogy between classical thermodynamic parameters and black hole parameters, the four laws of thermodynamics are reinterpreted for Kerr and Kerr-Newman black holes. A simple model for the dynamic relationships was obtained by considering the surface area of the outer horizon of a Kerr and Kerr-Neumann black hole as the area of a perfect black body. Finding the conditions these black holes should satisfy, the equations were numerically solved and simulated for the Hawking temperature, Hawking radiation and entropy variations of Kerr and Kerr-Newman black holes. The Hawking temperature and Hawking radiation of a given rotating black hole drastically increases at the final stage of the black hole evaporation. In the meantime, the entropy of a rotating black hole drastically decreases through the time. The additional angular momentum and the charge effects gain high Hawking temperatures and high Hawking radiation values for the black holes while these effects reduce the entropy of the black holes.
    Źródło:
    World Scientific News; 2018, 114; 106-125
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The Time at the Level of a High Speed Moving Object
    Autorzy:
    Spacey, John
    Powiązania:
    https://bibliotekanauki.pl/articles/1193284.pdf
    Data publikacji:
    2021
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    General Relativity
    Quantum Mechanics
    astronomy
    astrophysics
    black-hole
    cosmology
    dark Matter and dark Energy
    galaxies
    gravity
    negative space-time
    Opis:
    I think that far-away travels into Space are possible in the way that it is possible to find again people on our Earth, after the return of a very long travel into Space, not aged, like the people who have traveled inside the spacecraft. Current physics does not allow this and I have developed the following Theory which would thus complement the current Theory of General Relativity when we go to the limits of the reasoning. Current Theories like General Relativity or Quantum Mechanics are not impacted when the reasoning is not pushed to the limits. My reasoning at the limits just complements current Theories when the parameters take extreme values and thus the logic of current physics is respected.
    Źródło:
    World Scientific News; 2021, 153, 1; 1-42
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Formation, propagation and detection of gravitational waves
    Autorzy:
    Shaliq, Mohamed Armoon
    Prasanna, R. Sharath
    Powiązania:
    https://bibliotekanauki.pl/articles/1819192.pdf
    Data publikacji:
    2020
    Wydawca:
    Politechnika Koszalińska. Wydawnictwo Uczelniane
    Tematy:
    LIGO
    virgo
    gravitational waves
    interferometer
    black hole collision
    neutron star collision
    interferometr LIGO
    fala grawitacyjna
    interferometr
    czarna dziura
    gwiazdy neutronowe
    Opis:
    Gravitational Waves are a new form of energy that is too sensitive to measure. The study of Gravitational Waves paves a unique way to approach the new era of universal science. It is quite interesting to note that experimental proof of the early theory of Einstein is successfully proven after many years. The manuscript depicts the concepts of Gravitational Waves, propagation of Gravitational Waves, its effect on objects on Earth and various factors that affect the measurements along with their method of approach to detect Gravitational Waves. Detecting Gravitational Waves is a tedious process and it requires a very highly sensitive experimental setup to carry out the detection as well as on considering the current trend of technology it is observed that detection faces massive limitations. Detection of Gravitational Waves opens up a new way for understanding supermassive binary systems such as neutron stars and black holes and also for studying on Early universe history.
    Źródło:
    Journal of Mechanical and Energy Engineering; 2020, 4, 2; 189--196
    2544-0780
    2544-1671
    Pojawia się w:
    Journal of Mechanical and Energy Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A Study of Quantum Effects in General Relativity
    Autorzy:
    Sooriyaarachchi, V. K. C.
    Wijewardena Gamalath, K. A. I. L.
    Powiązania:
    https://bibliotekanauki.pl/articles/1058092.pdf
    Data publikacji:
    2019
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Hawking effect
    Rindler observer
    Schwarzschild black hole
    Unruh effects
    event horizon
    information loss paradox
    scalar curvature
    surface gravity
    transplanckian problem
    Opis:
    The present work discusses the conceptual and technical issues encountered in formulating a quantized theory of gravity, via the reconciliation of quantum mechanics and general relativity. Quantum effects arising in a classically defined space-time derived through a semi classical approximation are studied at length and the significance of the particle interpretation in quantum field theory in the origin of such effects is established. The contradicting nature of the quantum effects against classically established principles is studied by considering the Hawking effect in a Schwarzschild black hole space-time. Further, the limits of prominent manifestation of the quantum effects with regards to the black hole mass is calculated taking into consideration the cosmic microwave background and the lifetime of the universe. Quantum effects are established as essential in incorporating thermal physics and black hole mechanics in a consistent formulation. Finally, the validity of the semi classical approximation is studied in terms of Planck scale black holes, transplanckian problem and the information loss paradox and the requirement for a fully quantized theory of gravity is realized.
    Źródło:
    World Scientific News; 2019, 134, 2; 198-219
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-13 z 13

      Ta witryna wykorzystuje pliki cookies do przechowywania informacji na Twoim komputerze. Pliki cookies stosujemy w celu świadczenia usług na najwyższym poziomie, w tym w sposób dostosowany do indywidualnych potrzeb. Korzystanie z witryny bez zmiany ustawień dotyczących cookies oznacza, że będą one zamieszczane w Twoim komputerze. W każdym momencie możesz dokonać zmiany ustawień dotyczących cookies