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  • 1
    Monograph available for loan
    Monograph available for loan
    Metodičeskie podchody k ispol'zovaniju biologičeskich indikatorov v paleoėkologii (2011)
    Kazan' : Kazanskij Universitet
    Details Availability
    Call number: AWI Bio-12-0024
    Description / Table of Contents: The book contains methodical overview of the main groups of biological indicators used in palaeoecology: pollen, diatoms, chironomids larvae, cladocera, ostracods, sponges, some other less widely used groups of invertebrates and a review on application of pedohumic method for palaeoecological reconstructions. Articles contain information on systematics, morphology, biology of the selected proxy groups and the modern approaches to palaeoclimatic reconstructions. Applicability of the biological indicators is illustrated by case studies from different regions: steppe Altay and Altay mountains, central and northern Yakutia, Northern Ural, west Siberia, lake Baikal, Tien Shan mountains, Middle Volga, etc. The book can be interesting for specialists in palaeoecology and students.
    Description / Table of Contents: В книге представлены методические обзоры по основным группам биологических индикаторов, применяемым в палеоэкологии: пыльца, диатомовые водоросли, личинки хирономид, ракообразные, остракоды, губки - и кратко охарактеризованы прочие группы беспозвоночных животных. В книгу также вошел обзор по применению педогумусового метода для палеоэкологических реконструкций. Обсуждаются современные подходы к использованию биологических индикаторов в качестве показателей палеоклиматических изменений и проблемные стороны проведения экологических и температурных реконструкций. Представлены примеры палеореконструкций, выполненных с применением различных индикаторных групп из различных регионов: Степной и Горный Алтай, Центральная и Северная Якутия, Северный Урал, Западная Сибирь, Байкал, Тянь-Шань, Среднее Поволжье и пр. Книга рассчитана на специалистов в области палеоэкологии и на студентов.
    Type of Medium: Monograph available for loan
    Pages: 278 Seiten , Illustrationen
    ISBN: 978-5-98180-934-7
    Language: Russian
    Note: СОДЕРЖАНИЕ Введение / (Л.Б. Назарова, Д.К. Нургалиев) Глава 1. Личинки хирономид (Diptera: Chironomidae) как индикаторы палеоклиматических изменений / (Л.Б. Назарова) Глава 2. Ветвистоусые ракообразные ( Cladocera Latreille, 1829, Branchiopoda, Crustacea) в палеоэкологических исследованиях / (Л.А. Фролова) Глава 3. Пресноводные остракоды и их применение в палеоэкологических исследованиях / (С . Веттерих, К. Зиrерт) Глава 4. Губки (Porifera, Spongia) в палеолимнолоrических исследованиях / (Е . Вейнберr) Глава 5. Водные беспозвоночные в палеолимнолоrии / (Л.Б . Назарова, О.Н. Туманов, Р.М. Сабиров) Глава 6. Палинологический анализ / (Н.А. Рудая) Глава 7. Использование метода диатомового анализа в палеолимнологических исследованиях / (О.В. Палагушкина, Л.А. Пестрякова) Глава 8. Диагностика и реконструкция палеоэкологических условий педогумусовым методом / (М.И. Дергачева) Заключение (Л.Б. Назарова, Д.К. Нургалиев) Литература Summary , In kyrillischer Schrift
    Location: AWI Reading room
    Branch Library: AWI Library
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  • 2
    Electronic Resource
    Electronic Resource
    Backscattering of ultrashort high intensity laser pulses from solid targets at oblique incidence (2002)
    [S.l.] : American Institute of Physics (AIP)
    Physics of Plasmas 9 (2002), S. 581-588 
    Details
    ISSN: 1089-7674
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Backreflection of short, intense laser pulses at oblique incidence on solid targets is explained with a model where a periodic electron density modulation acts as a diffraction grating. The pump and reflected electromagnetic waves drive through the ponderomotive force the grating, and the coupled system becomes parametrically unstable. The basic equations governing this situation are given. A linearized stability analysis is used to obtain the instability growth rate in a homogeneous plasma and the convective gain coefficients for the inhomogeneous case. The results support the feasibility of the suggested mechanism. An absolute instability is predicted to set on at a threshold intensity of about 1016 W/cm2 for a typical laser pulse with a length of 100 fs and a spot size of 30 μm. The instability is shown to saturate at a level of a few percent, because the higher harmonics in the electron density modulation make the diffraction more diffuse, thus reducing both the ponderomotive force and the backreflection coefficient. © 2002 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1423620
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  • 3
    Electronic Resource
    Electronic Resource
    Waveguide propagation of intense electromagnetic radiation in slightly inhomogeneous nonlinear media (1993)
    Woodbury, NY : American Institute of Physics (AIP)
    Chaos 3 (1993), S. 107-115 
    Details
    ISSN: 1089-7682
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The propagation of self-localizing beams of electromagnetic waves in the form of nonlinear waveguides in a slightly inhomogeneous medium is studied analytically and numerically. The trajectories of the axial ray are studied as a function of its direction and the field strength at the initial point on the basis of a nonlinear scalar Helmholtz equation. Analytic expressions are derived. The longitudinal refractive index, the field intensity, and the waveguide radius are plotted as functions of the instantaneous position of the point on the axial ray. Deep penetration of the beam into the opaque region and the position of the screening surface are studied as functions of the parameters of the beam and the medium. A steady-state 3D problem is analyzed for a power-law nonlinearity with an arbitrary power. A 2D problem is analyzed for the case of a ponderomotive nonlinearity with saturation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.165972
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  • 4
    Electronic Resource
    Electronic Resource
    Influence of thermal annealing on the intensity of the 1.54-µm photoluminescence band in erbium-doped amorphous hydrogenated silicon (1999)
    Springer
    Semiconductors 33 (1999), S. 93-96 
    Details
    ISSN: 1063-7826
    Source: Springer Online Journal Archives 1860-2000
    Topics: Electrical Engineering, Measurement and Control Technology , Physics
    Notes: Abstract Erbium-doped a-Si:H films are prepared by magnetron sputtering of a Si-Er target at a deposition temperature of 200 °C. The films are then subjected to cumulative thermal annealing. A sharp increase (∼50-fold) in the photoluminescence intensity at a wavelength of 1.54 µm is observed after a 15-min anneal at 300 °C in a nitrogen atmosphere. At an anneal temperature ⩾500 °C the photoluminescence signal decreases essentially to zero. The influence of thermal annealing processes is discussed in the context of the model of partial transformation of the structural network of amorphous a-Si(Er):H films.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1134/1.1187654
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  • 5
    Electronic Resource
    Electronic Resource
    Escape into vacuum of fast electrons generated by oblique incidence of an ultrashort, high-power laser pulse on a solid target (1999)
    Springer
    Journal of experimental and theoretical physics 89 (1999), S. 632-639 
    Details
    ISSN: 1090-6509
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The possibility that fast electrons can escape in a direction close to the trajectory of a reflected ultrashort laser pulse at extremely high laser radiation fluxes is examined analytically and numerically. Analytic estimates are made of the feasibility of forming electron bursts in the plasma and of their subsequent motion. The self-consistent, collisionless motion of a plasma acted on by specified incident and reflected ultrashort laser pulses is modeled in two dimensions by the particle-in-cell method. It is shown that a substantial number of electrons located in the subcritical region are gathered into bunches by the resultant forces and escape to the vacuum in a direction different from the normal to the target surface within a narrow range of solid angles. This demonstrates the feasibility of laser acceleration of an electron burst during reflection of an ultrashort laser pulse from a solid target.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1134/1.559023
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  • 6
    Electronic Resource
    Electronic Resource
    Induced γ-ray fluorescence of isomeric nuclei in a magnetic trap (1998)
    Springer
    JETP letters 68 (1998), S. 704-710 
    Details
    ISSN: 1090-6487
    Keywords: 29.30.Kv ; 23.20.Lv ; 52.55.Lf
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Gamma-ray fluorescence induced in isomeric nuclei in a magnetic trap by x radiation from a laser plasma is studied. It is shown that under these conditions it is possible to obtain a γ-ray pulse with a duration of 100 ps and energy 10−5 J.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1134/1.567932
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  • 7
    Electronic Resource
    Electronic Resource
    Observation of fine structure in the photoluminescence spectrum of an Er3+ ion in an amorphous silicon matrix (1999)
    Springer
    JETP letters 70 (1999), S. 797-800 
    Details
    ISSN: 1090-6487
    Keywords: 78.55.Ap ; 71.70.Ej
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract A multicomponent Stark structure corresponding to a 4I 13/2→4I 15/2 transition in the 4f 11 shell of Er3+ ions is observed in hydrogenated amorphous silicon (a-Si:H) subjected to low-temperature (150 °C) anneal. The observation of narrow, strong components indicates that the erbium ions form a highly ordered local surrounding (Er-O-Si nanoclusters) in the labile, disordered structural network of a-Si:H.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1134/1.568233
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  • 8
    Electronic Resource
    Electronic Resource
    Vibrational spectra of erbium-and copper-modified hydrogenated amorphous carbon (1999)
    Springer
    Semiconductors 33 (1999), S. 569-573 
    Details
    ISSN: 1063-7826
    Source: Springer Online Journal Archives 1860-2000
    Topics: Electrical Engineering, Measurement and Control Technology , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1134/1.1187730
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  • 9
    Electronic Resource
    Electronic Resource
    Reactions of stannyl carbamates with organochlorosilanes (1994)
    Springer
    Russian chemical bulletin 43 (1994), S. 293-294 
    Details
    ISSN: 1573-9171
    Keywords: stannyl and silyl carbamates.
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Rapid and exothermic reactions of stannyl carbamates with organochlorosilanes result in cleavage of the Sn-O-C bond and afford silyl carbamates in a high yield.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00695833
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  • 10
    Electronic Resource
    Electronic Resource
    Reaction of α-(trialkylstannyl) acetylenes with metallic sodium (1994)
    Springer
    Russian chemical bulletin 43 (1994), S. 1048-1049 
    Details
    ISSN: 1573-9171
    Keywords: α-(trialkylstannyl)acetylenes, reaction with sodium ; hexaalkyldistannanes ; sodium acetylenides ; trialkylstannyl(trimethylsilyl)acetylenes ; bis(trialkylstannyl)acetylenes
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract α-Trialkylstannylacetylenes react under mild conditions with metallic sodium at the Sn-C(sp) bond to give hexaalkyldistannanes and sodium acetylalkynides inca. 65–85 % yields.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01558077
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