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  • 1
    Online Resource
    Online Resource
    Seismic Inversion Methods: A Practical Approach (2020)
    Cham :Springer International Publishing :
    Details
    Keywords: Geophysics. ; Geotechnical engineering. ; Environmental sciences. ; Physics. ; Geophysics. ; Geotechnical Engineering and Applied Earth Sciences. ; Environmental Physics.
    Description / Table of Contents: 1. Fundamental of seismic inversion -- 2. Seismic data handling -- 3. Post-stack seismic inversion -- 4. Pre-stack inversion -- 5. Amplitude variation with offset (AVO) inversion -- 6. Optimization Methods for Nonlinear Problems -- 7. Geostatistical inversion.
    Abstract: This book introduces readers to seismic inversion methods and their application to both synthetic and real seismic data sets. Seismic inversion methods are routinely used to estimate attributes like P-impedance, S-impedance, density, the ratio of P-wave and S-wave velocities and elastic impedances from seismic and well log data. These attributes help to understand lithology and fluid contents in the subsurface. There are several seismic inversion methods available, but their application and results differ considerably, which can lead to confusion. This book explains all popular inversion methods, discusses their mathematical backgrounds, and demonstrates their capacity to extract information from seismic reflection data. The types covered include model-based inversion, colored inversion, sparse spike inversion, band-limited inversion, simultaneous inversion, elastic impedance inversion and geostatistical inversion, which includes single-attribute analysis, multi-attribute analysis, probabilistic neural networks and multi-layer feed-forward neural networks. In addition, the book describes local and global optimization methods and their application to seismic reflection data. Given its multidisciplinary, integrated and practical approach, the book offers a valuable tool for students and young professionals, especially those affiliated with oil companies.
    Type of Medium: Online Resource
    Pages: VII, 216 p. 155 illus., 143 illus. in color. , online resource.
    Edition: 1st ed. 2020.
    ISBN: 9783030456627
    Series Statement: Springer Geophysics,
    URL: https://doi.org/10.1007/978-3-030-45662-7
    DOI: 10.1007/978-3-030-45662-7
    DDC: 550
    Language: English
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  • 2
    Electronic Resource
    Electronic Resource
    Structure of melts in binary organic eutectics and molecular complexes. Phenanthrene-picric acid and anthracene-picric acid systems (1985)
    s.l. : American Chemical Society
    Journal of chemical & engineering data 30 (1985), S. 49-50 
    Details
    ISSN: 1520-5134
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/je00039a016
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  • 3
    Electronic Resource
    Electronic Resource
    Thermochemical studies on organic eutectics and molecular complexes (1989)
    Springer
    Journal of thermal analysis and calorimetry 35 (1989), S. 1687-1697 
    Details
    ISSN: 1572-8943
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Zusammenfassung Die Phasendiagramme der binären Systeme von Pikrinsäure mit Naphthalin, Anthrazen und Phenanthren sowie von α-Naphthol mit p-Aminotoluol wurden bestimmt. In jedem System zeigt sich die Bildung eines Molekülkomplexes sowie je zwei Eutektika. Mittels DSC wurden die Schmelzwärmen der reinen Komponenten, der eutektischen Mischungen und der Molekülkomplexe ermitteis. Der Vergleich der experimentell ermittelten Schmelzwärmen mit den mittels der Mischungsregel errechneten Werten läßt auf eine Clusterbildung in der Schmelze schließen. Weiterhin wurden aus den Schmelzwärmen auch Werte für Schmelzentropie und Mischungsenthalpie errechnet.
    Abstract: Резюме Найденные методом ра сстаивание — расплав фазовые диаграммы дв ойных систем пикриновой кислоты с нафталином, антрацен ом и фенантреном, а такжеα-нафтола с птолуиди ном показали образовани е в каждой системе мол екулярного комплекса и двуз эвте ктик. Методом ДСК определе ны теплоты плавления чистых компонент, эвтектик и молекулярных комплексов. Сопостав ление экспериментал ьно полученных теплот пл авления с теоретичес ки вычисленными на осно ве закона смеси, предп олагает образование кластер ов в расплавах. Исходя из данных тепл от плавления были так же вычислены энтропия п лавления, энтальпия смешения и избыточны е термодинамические функции.
    Notes: Abstract The phase diagrams of the binary systems of picric acid with naphthalene, anthracene and phenanthrene, and of α-naphthol withp-toluidine, determined by the thaw-melt method, show the formation of a molecular complex and two eutectics in each system. The heats of the pure components, eutectics and molecular complexes were determined by differential scanning calorimetry. Comparison of the experimental heats of fusion with the theoretical values calculated via the mixture law suggests cluster formation in the melts. The entropy of fusion, enthalpy of mixing and excess thermodynamic functions were also calculated from the heat of fusion data.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01912943
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  • 4
    Electronic Resource
    Electronic Resource
    Determination of129I and127I in human thyroid blocks containing mercury as a preservative (1988)
    Springer
    Journal of radioanalytical and nuclear chemistry 124 (1988), S. 301-311 
    Details
    ISSN: 1588-2780
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract A solvent extraction techniques has been developed to separate iodine from mercury contained in thyroid tissues for the determinations of129I and127I in human thyroid blocks by neutron activation analysis. The tissue samples are digested with a mixture of 5 ml HCl and 1 ml HNO3 in a round-bottomed flask fitted with a condenser running with cold water to avoid any loss of iodine. Iodine is extracted into 0.1 M dihexyl sulfide solution in xylene leaving the majority of the mercury in the aqueous phase. Iodine is adsorbed on activated charcoal packed in quartz tubes either by heating the xylene containing iodine in the presence of oxygen or by heating the aqueous solution obtained after back extracting iodine from xylene using a saturated sulfur dioxide solution. Iodine is desorbed from the charcoal and trapped into a quartz ampule which is sent for neutron activation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02041323
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  • 5
    Electronic Resource
    Electronic Resource
    Interpretation of bioassay measurements using different systemic models for plutonium (1995)
    Springer
    Journal of radioanalytical and nuclear chemistry 197 (1995), S. 67-78 
    Details
    ISSN: 1588-2780
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract In vitro bioassay measurements for plutonium have been performed on a routine basis for many years. Since the biokinetic models have changed considerably and the dose limitation systems have become more restrictive, it is necessary to estimate the impact of these changes on the interpretation of bioassay measurements. This study is carried out for the plutonium systemic models proposed by the ICRP publications: ICRP-30, ICRP-48, and ICRP-56, using the excretion functions proposed by Langham, Durbin, and Jones. A quantitative comparison of dose estimates using the dose limitation systems proposed in the ICRP Publications 26 and 60 is also done. In order to evaluate the impact on the use of the new ICRP respiratory tract model, a comparative study of intake and dose estimates, using the new and the ICRP-30 respiratory tract models, was also done for the case of inhalation of plutonium compounds. These calculations are particularly important to provide means to compare doses when the occupational exposures lasted many years and the doses were assessed using different models and dose limitation systems. Since some countries are in the process of changing the dose limitation system from the recommendations of the ICRP-26 to the ICRP-60, or even from the ICRP-2 to the ICRP-26, a quantitative comparison of dose estimates will be shown. In order to evaluate the impact on the use of the new ICRP respiratory tract model, a comparative study of intake and dose estimates using the new and the ICRP-30 respiratory tract models will also be shown for the case of inhalation of plutonium compounds.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02040222
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  • 6
    Electronic Resource
    Electronic Resource
    Background levels of uranium in human urine (1992)
    Springer
    Journal of radioanalytical and nuclear chemistry 156 (1992), S. 407-412 
    Details
    ISSN: 1588-2780
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract The literature on the normal content of uranium in urine is reviewed. The reported normal concentration has declined several orders of magnitude over the years, probably due to improvements in analytical technique rather than a real change. The lowest mean values were reported with α spectrometry (mean of 23 ng/l in 12 subjects) and thermal ion mass spectrometry (3.4 ng/l in 1 subject). Even α spectrometry is not sufficiently sensitive at normal levels, so that techniques such as fission track analysis or mass spectrometry must be used to obtain results above the detection limit of the technique for individual samples.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02038354
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  • 7
    Electronic Resource
    Electronic Resource
    Determination of thorium in human urine by neutron activation (1994)
    Springer
    Journal of radioanalytical and nuclear chemistry 182 (1994), S. 53-56 
    Details
    ISSN: 1588-2780
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract A routine procedure for the determination of thorium in urine of workers has been developed by the neutron activation method. The technique suggested by Dang, et. al. has been modified in order to reduce the costs involved and the sample processing time. The samples were irradiated in the MIT (Massachusetts Institute of Technology-Boston) reactor, in a thermal neutron flux of 8×1012n.cm−2.s−1 for 31/2 hours. Thorium-232 was determined by counting233Pa.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02047965
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  • 8
    Electronic Resource
    Electronic Resource
    A critical review of bioassay techniques for actinides in light of ICRP recommendations for monitoring workers (1995)
    Springer
    Journal of radioanalytical and nuclear chemistry 197 (1995), S. 41-50 
    Details
    ISSN: 1588-2780
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract A critical review is presented of bioassay techniques for actinides in light of ICRP recommendations for monitoring workers. It is obvious that very sensitive techniques are required to meet these recommendations. Alpha spectrometry, the most commonly employed technique for measuring actinides in bioassay samples, has limited sensitivity. There are, however, certain techniques which are sensitive enough to meet the recommendations of ICRP, such as, fission track analysis for239Pu and235U, neutron activation analysis for232Th, mass spectrometry for a number of radionuclides, and many techniques for uranium. ICP-mass spectrometry does not have enough sensitivity to be implemented as a method of choice for the bioassay of actinides at present, however, it is quite promising.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02040219
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  • 9
    Electronic Resource
    Electronic Resource
    Is plutonium really a threat to man and his environment? (1997)
    Springer
    Journal of radioanalytical and nuclear chemistry 226 (1997), S. 37-40 
    Details
    ISSN: 1588-2780
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract Plutonium is a vital source of energy. The importance of plutonium as a source of energy can easily be understood by a simple fact that the amount of energy produced from one gram of plutonium is equal to the energy produced from 100 g of uranium and/or one ton of oil. Plutonium poses little or no problem as a high level waste. This can be predicted from our earlier studies on Th in man which has indicated that the general population of the United States exposed to insoluble Th throughout the life times accumulates the amount of Th contained in 1–6 g of soil. Furthermore, the vitrification process can prevent the translocation of Pu into the environment from the waste storage site quite effectively. Plutonium is a great asset to the human race only if they are civilized and use this great element for their prosperity as a source of energy. However, if the people and/or their leaders become barbaric, inhumane, crazy and misguided, then Pu could be the greatest threat to the survival of human race. Therefore, man himself could become the greatest threat to the human race.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02063621
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  • 10
    Electronic Resource
    Electronic Resource
    Simultaneous determinations of alpha-emitting isotopes of uranium and plutonium in bone (1984)
    Springer
    Journal of radioanalytical and nuclear chemistry 81 (1984), S. 247-253 
    Details
    ISSN: 1588-2780
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract A radiochemical procedure has been developed for the simultaneous determinations of alpha-emitting isotopes of uranium and plutonium in bovine bone. The radiochemical recoveries ranged from 61 to 93% with a mean of 80±10% for uranium and 57 to 88% with a mean of 75±11% for plutonium. The method was successfully used for human bone.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02135377
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