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  • 1
    Electronic Resource
    Electronic Resource
    Bromination of [(2-salicylidene)alkanoato(2-)]metal- (II) complexes
    Amsterdam : Elsevier
    Inorganica Chimica Acta 44 (1980), S. L251-L252 
    Details
    ISSN: 0020-1693
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/S0020-1693(00)91024-7
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  • 2
    Electronic Resource
    Electronic Resource
    Professor W. Heisenberg in Prague (1968)
    Springer
    Czechoslovak journal of physics 18 (1968), S. 960-962 
    Details
    ISSN: 1572-9486
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01925737
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  • 3
    Electronic Resource
    Electronic Resource
    Bremsstrahlung of hot quantum plasma (1975)
    Springer
    Czechoslovak journal of physics 25 (1975), S. 325-330 
    Details
    ISSN: 1572-9486
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The classical Debye field is replaced by the respective quantum modification for a hot quantum plasma. The bremsstrahlung spectrum and the total bremsstrahlung intensity are investigated in detail. The results of numerical calculations are tabulatedvs. the characteristic parameterβ=ℏω0 /kT, whereω 0 is the plasma frequency and other symbols have their standard meaning. It is found that the deviations from the bremsstrahlung of a classical plasma become significant for the valuesβ≳10−2. These modifications are to be taken into consideration in the interpretation of the bremsstrahlung measurements.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01589628
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  • 4
    Electronic Resource
    Electronic Resource
    Bremsstrahlung of Debye plasma (1973)
    Springer
    Czechoslovak journal of physics 23 (1973), S. 888-891 
    Details
    ISSN: 1572-9486
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The effect of Debye screening on the bremsstrahlung spectrum and total bremsstrahlung intensity of plasma is calculated. As compared with the Coulomb field approximation (infinitely large Debye radiusL) an additional density and temperature dependence of the radiation intensity is found. Results are expressed in terms of a dimensionless parameterμ=ħ2/2mL 2 kT, wherem is the rest mass of an electron and other symbols have their standard meaning. Deviations from the Coulomb field approximation become significant for the valuesμ ≳ 10−3.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01586869
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  • 5
    Electronic Resource
    Electronic Resource
    Photon bremsstrahlung from an extreme relativistic hydrogen plasma (1969)
    Springer
    Czechoslovak journal of physics 19 (1969), S. 1533-1539 
    Details
    ISSN: 1572-9486
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The effect of the electron-positron pair creation on the intensity of radiation by an extreme relativistic plasma is studied. The degeneracy of the electron and positron gases is taken into account. It is found that the pair creation is of considerable importance for both the quantity and temperature dependence of the radiation intensity.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01698895
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  • 6
    Electronic Resource
    Electronic Resource
    Exact solutions for electromagnetic waves in inhomogeneous media (1985)
    Springer
    Czechoslovak journal of physics 35 (1985), S. 1205-1208 
    Details
    ISSN: 1572-9486
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Exact solutions of the wave equation for the propagation of electromagnetic waves in some inhomogeneous media are found. The first solution corresponds to the barometric model of the atmosphere, whose index of refraction can be expressed by the formulaN 2(z)=1+(N 0 2 -1) exp (−z/z 0). The other cases correspond toN 2(z)=1+(N 0 2 -1) ch−2(βz) andN 2(z)=a-b. [1+exp(z/L)]−1.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01597005
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  • 7
    Electronic Resource
    Electronic Resource
    The inverse problem for diffusion equations (1985)
    Springer
    Czechoslovak journal of physics 35 (1985), S. 490-493 
    Details
    ISSN: 1572-9486
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract In the standard procedure one has to find the concentration from given initial (and boundary) conditions. We investigate here an inverse problem: to find the initial concentration from the known resulting concentration. This problem is of importance particularly for non-linear diffusion equations where the concentration dependenceD ≡ D(c) of the diffusion coefficient is analysed in terms of the Boltzmann-like solutionc ≡ f(xt−1/2). This type of solution is, however, closely related to a very special initial condition for the concentration. The disregard of this fact might lead to misleading analysis ofD(c).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01595463
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  • 8
    Electronic Resource
    Electronic Resource
    Radiation losses in completely ionized plasma (1960)
    Springer
    Czechoslovak journal of physics 10 (1960), S. 14-21 
    Details
    ISSN: 1572-9486
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Description / Table of Contents: Abstract В работе подсчитаны п отери от тормозного и злучения, возникающи е при столкновениях электронов с ионами и электронов с электро нами в полностью иони зированной плазме (в Борновском п риближении). Расчет мо жно сделать аналитич ески для плазмы достаточно разрежен ной (плазма с бесконеч но большим радиусом Д ебай-Гюккеля). Этому предположению очень хорошо удовлет воряют известные уст ановки для осуществл ения управляемой термояд ерной реакции. Для кол ичества энергии, излу ченной кубическим сантимет ром плазмы за одну сек унду найдена зависим остьI=an 2√τ. ⋅(1+3/√2τ), гдеа=0,73. 10−16 MeVcm2s−1,n —п лотность ионов иτ=kT/mc 2. В релятивистской области температурkT≈mc 2 начинает преобла дать влияние столкно вений электронов с электро нами. Некоторые важны е результаты, касающи еся радиационных потерь в релятивистс кой плазме будут публ иковаться в следующе й работе.
    Notes: Abstract The losses caused by bremsstahlung during electron-ion and electron-electron collisions in a completely ionized plasma (in Born's approximation) are calculated. The calculation can be carried out analytically for a sufficiently dilute plasma (plasma with infinitely large Debay-Hückel radius). This assumption is satisfied very well by the known classification to actual controlled thermonuclear reaction. A dependence of the formI=an 2. ⋅√τ(1+3/√2τ), wherea=0·73×10−16 MeV.cm3.sec−1,n is the number of ions per cm3 and τ=kT/mc 2, is determined for the amount of energy radiated from 1 cm3 of plasma per sec. In the relativistic temperature regionkT≈mc 2 the influence of electron-electron collisions begins to predominate. A number of important results concerning radiation losses in relativistic plasma will be published in a later paper.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01557095
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  • 9
    Electronic Resource
    Electronic Resource
    ЗАМЕЧАНИЕ К ЭЛЕКТРОД ИНАМИКЕ БОППА И ПОДОЛЬСКОГО (1960)
    Springer
    Czechoslovak journal of physics 10 (1960), S. 81-90 
    Details
    ISSN: 1572-9486
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Description / Table of Contents: Abstract A description of the electromagnetic field in vacuum as a specific bi-field, formed by the vectorsE,B andH,D, leads, on the assumption of non-local relation between the components of the bi-field, to electrodynamics of the typeL(□) □A μ=—j μ, whereL(□) is a rational function of □. The scatering of electrons in a Bopp-Podolsky field of force is studied and compared with the results of H offstadter experiments. The close connection is shown between electrodynamics with higher derivatives and the results and methods of modern quantum electrodynamics (polarization of electron-positron vacuum, Pauli-Villars regularization).
    Notes: Abstract Представление элект ромагнитного поля в в акууме как специφиче ского би-поля, создаваемого вектор амиE, B иH,D, приводит пр и предположении нело кального соотношения между со ставляющими би-поля к электродинамике тип аL(□) □A μ=—j μ, гдеL(□) является рац иональной φункцией о т p[. Исследуется рассея ние электронов в поле Боп па-Подольского и срав нивается с результат ами экспериментов Гоφφштадтера. Далее у казывается на тесную связь электродинами ки с производными высших порядков с рез ультатами и методами современной квантов ой электродинамики (пол яризация элоктрон-по зитронового вакуума, регуляризация Паули-Вилларса).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01557108
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  • 10
    Electronic Resource
    Electronic Resource
    Losses through bremsstrahlung in relativistic and ultra-relativistic region of electron temperatures of plasma (1960)
    Springer
    Czechoslovak journal of physics 10 (1960), S. 261-267 
    Details
    ISSN: 1572-9486
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Description / Table of Contents: Abstract В работе подсчитаны п отери из-за тормозног о излучения в достато чно разряженной водородной плазме (пл азма с бесконечно бол ьшим радиусом Дебая-Г юккеля) для релятивис тской (kT≲mc 2) и ультрарелятиви стской (kT≫тс 2) областе й электронных темпер атурт — масса покоя элект рона. В ультрарелятив истской области темп ератур количество энергииI tot, излученной одним к убическим сантиметр ом плазмы за 1 секунду в результате столкно вений электронов с ио нами и электронов с эл ектронами, дано уравнением $$I^{tot} = 3 \cdot 39.10^{ - 29} \frac{{n^2 }}{\mu }[1,86 + E_1 (\mu )]Wattcm^{ - 3} ,$$ гдеn — плотность ионо в (или же электронов),μ=kT/mc 2 и $$E_1 (\mu ) = \int\limits_\mu ^\infty {x^{ - 1} } \exp ( - x)dx$$ интегральный экспон ент. Результаты приме нимы для плазмы, плотн ость которойn≪1030 cm−3.
    Notes: Abstract The losses through bremsstrahlung in a sufficiently diluted hydrogen plasma (plasma with infinitely large Debye-Hückel radius) are calculated for the relativistic (kT≲mc 2) and ultra-relativistic (kT≫mc 2) region of electron temperatures. (m is the rest mass of the electron). In the ultra-relativistic temperature region the amount of energyI tot emitted by 1 cm3 of plasma per sec as a result of electron-ion and electron-electron collisions is given by $$I^{tot} = 3 \cdot 39 \times 10^{ - 29} \frac{{n^2 }}{\mu }[1 \cdot 86 + E_1 (\mu )]Wattcm^{ - 3} $$ wheren is the density of the ions (or electrons),μ=kT/mc 2 and $$E_1 (\mu ) = \int\limits_\mu ^\infty {x^{ - 1} } \exp ( - x)dx$$ is the integral exponent. The results are suitable for a plasma the density of which isn≪1030cm−3.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02033530
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