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  • 1
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    Springer Nature | Springer
    Publication Date: 2024-04-14
    Description: This is an open access book. It offers comprehensive, self-contained knowledge on Mobile Edge Computing (MEC), which is a very promising technology for achieving intelligence in the next-generation wireless communications and computing networks. The book starts with the basic concepts, key techniques and network architectures of MEC. Then, we present the wide applications of MEC, including edge caching, 6G networks, Internet of Vehicles, and UAVs. In the last part, we present new opportunities when MEC meets blockchain, Artificial Intelligence, and distributed machine learning (e.g., federated learning). We also identify the emerging applications of MEC in pandemic, industrial Internet of Things and disaster management. The book allows an easy cross-reference owing to the broad coverage on both the principle and applications of MEC. The book is written for people interested in communications and computer networks at all levels. The primary audience includes senior undergraduates, postgraduates, educators, scientists, researchers, developers, engineers, innovators and research strategists.
    Keywords: Open Access ; mobile edge computing ; 5G beyond ; 6G ; edge caching ; Internet of Things ; UAV ; thema EDItEUR::U Computing and Information Technology::UM Computer programming / software engineering::UMS Mobile and handheld device programming / Apps programming ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TJ Electronics and communications engineering::TJK Communications engineering / telecommunications::TJKW WAP (wireless) technology ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TH Energy technology and engineering::THR Electrical engineering ; thema EDItEUR::U Computing and Information Technology
    Language: English
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  • 2
    ISSN: 1572-901X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Six transition metal(II) complexes with 8-acetyl-4-methyl umbelliferone (AMUH), ML2 (L = AMU−; M = Mn, Co, Ni, Cu, Zn and Cd), have been synthesized and characterized by elemental analysis, electrical conductance, i.r., 1H-n.m.r. and u.v. spectroscopic techniques. The e.s.r. spectra show that CuL2 is anisotropic, with g ⊥ ≈ 2.05 and g∥≈2.26. The MnL2 species is characterized by a very broad g≈2 centered resonance without manganese hyperfine structure. The antioxidative and other biological activities of selected complexes were also investigated, indicating that both the ligand and complexes exhibit a scavenging effect on the superoxide radical (O2 −·) and a suppressing effect on the hydroxyl radical (·OH). The suppressing effect on ·OH is greater than the scavenging effect on O2 −·. The Cu and Mn complexes exhibit very significant suppression ratios for both radicals. However, the inhibitory effect on lipid peroxides results show that, in the initial stage, the Cu and Mn complexes exhibit obvious inhibitory effects on lipid peroxides, but after one hour, they begin to accelerate the lipid peroxides. Lower catalytic activity and instability when the complexes react with active oxygen may be responsible for this dual nature. The ligand and four transition metal(II) complexes selectively, obviously, inhibit the growth of HCT-8 and HL-60 tumour cell lines. They also exhibit a minor influence on the proliferation of B cells in higher concentration (10−5 m), but only a weak effect on the proliferation of T cells of the BALB/C (nude rate) spleen cells.
    Type of Medium: Electronic Resource
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  • 3
    ISSN: 1572-9702
    Keywords: arrestment ; behaviour ; predator-prey interaction ; spider mites
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The response of the predatory mite Amblyseius longispinosus (Acari: Phytoseiidae) to the webnest of the spider mite nanjingensis (Acari: Tetranychidae) was examined using two-choice tests in the laboratory. A. longispinosus females were found significantly more often on leaves with webnests than on leaves without webnests and were often observed searching under the webbing. Because spider mites and their eggs were removed from the webnests before experiments, predators responded to stimuli associated with webbing, mite feeding damage and other residues in the webnests.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Applied microbiology and biotechnology 28 (1988), S. 356-360 
    ISSN: 1432-0614
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Summary Large quantities of purified Bordetella pertussis toxin were required to develop an investigational toxoid vaccine. To overcome the difficulties associated with the large scale growth of Bordetella pertussis in submerged culture, we employed an aeration strategy using compressed oxygen and an antifoam agent. The microorganism grown in this way in 1001 batches for 20–24 h yielded 4–6 mg·1-1 pertussis toxin.
    Type of Medium: Electronic Resource
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  • 5
    ISSN: 1432-0983
    Keywords: Key words Glycolytic gene ; Aspergillus oryzae ; Glucose induction
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract We cloned all the glycolytic genes from Aspergillus oryzae and analyzed their transcriptional regulation by the carbon source in the medium. The deduced amino-acid sequences of the glycolytic genes showed high identity (approximately 41–93%) to those from other lower eukaryotes. Genomic Southern hybridization indicated that all the genes existed as a single copy in the genome. Comparison of mRNA levels between mycelia grown on glucose and on pyruvate showed that most of the A. oryzae glycolytic genes were induced by glucose in the medium. The overall expression profiles of the A. oryzae glycolytic genes resembled those of Saccharomyces cerevisiae. The expression of one of the phosphofructokinase genes (pfkB), however, was repressed by glucose while both PFK1 and PFK2 were induced in S. cerevisiae. These findings indicate that further analysis of the transcriptional regulation of the A. oryzae glycolytic genes will be useful for investigating the evolutionary change of transcription regulation in lower eukaryotes and to construct promoters for industrial applications.
    Type of Medium: Electronic Resource
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  • 6
    ISSN: 1573-4943
    Keywords: Aminoacylase ; sodium dodecyl sulfate ; inactivation ; conformational change
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract During denaturation by sodium dodecyl sulfate (SDS), aminoacylase shows a rapid decrease in activity with increasing concentration of the detergent to reach complete inactivation at 1.0 mM SDS. The denatured minus native-enzyme difference spectrum showed two negative peaks at 287 and 295 nm. With the increase of concentration of SDS, both negative peaks increased in magnitude to reach maximal values at 5.0 mM SDS. The fluorescence emission intensity of the enzyme decreased, whereas there was no red shift of emission maximum in SDS solutions of increasing concentration. In the SDS concentration regions employed in the present study, no marked changes of secondary structure of the enzyme have been observed by following the changes in far-ultraviolet CD spectra. The inactivation of this enzyme has been followed and compared with the unfolding observed during denaturation in SDS solutions. A marked inactivation is already evident at low SDS concentration before significant conformational changes can be detected by ultraviolet absorbance and fluorescence changes. The inactivation rate constants of free enzyme and substrate-enzyme complex were determined by the kinetics method of the substrate reaction in the presence of inactivator previously described by Tsou [Tsou (1988),Adv. Enzymol. Related Areas Mol. Biol. 61, 381–436]. It was found that substrate protects against inactivation and at the same SDS concentrations, the inactivation rate of the free enzyme is much higher than the unfolding rate. The above results show that the active sites of metal enzyme containing Zn2+ are also situated in a limited and flexible region of the enzyme molecule that is more fragile to denaturants than the protein as a whole.
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    Springer
    Annals of mathematics and artificial intelligence 14 (1995), S. 75-98 
    ISSN: 1573-7470
    Source: Springer Online Journal Archives 1860-2000
    Topics: Computer Science , Mathematics
    Notes: Abstract Since Hanks and McDermott raised the problem of temporal projection (e.g. the Yale shooting problem) and showed that classical nonmonotonic logics failed to solve it, many solutions have been proposed. However, as indicated by some researchers, most of them are not completely satisfactory. In Zhang and Foo [22], we presented a theory of actions called thepersistent set approach (PSA). In this paper, we extend our previous work to deal with temporal reasoning. Different from those minimality-based approaches, we propose a persistence-based formalization of actions within the situation calculus framework, and show that this gives natural and intuitive solutions to the problem of temporal projection in many cases. Explanations of some of the differences between persistence and minimality are given. We show that our approach also provides a unified framework for representing actions with disjunctive effects, while most of the current methods are inappropriate for dealing with these actions in the general case.
    Type of Medium: Electronic Resource
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  • 8
    ISSN: 1612-1112
    Keywords: Column liquid chromatography ; p-tert-Butyl-calix[4]arene-bonded silica ; Nuclear magnetic resonance spectrometry ; PAHs ; Nucleosides bases
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary A new method is proposed for preparation of ap-tert-butyl-calix[4]arene-bonded silica stationary phase. The chemically modifiedp-tert-butyl-calix[4]arene is attached to silica gel via the silane coupling reagent γ-(ethylenediamino)-propyl-triethoxyl-silane. The bonded phase has been characterized by29Si and13C cross polarization/magic angle spinning solid-state nuclear magnetic spectrometry. The retention behavior of polycyclic aromatic hydrocarbons (PAHs), nucleosides and bases has been investigated on the bonded phase in the reversed-phase mode.
    Type of Medium: Electronic Resource
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  • 9
    Electronic Resource
    Electronic Resource
    Springer
    Journal of inclusion phenomena and macrocyclic chemistry 36 (2000), S. 335-342 
    ISSN: 1573-1111
    Keywords: Podophyllum bexan drum ; podophyllotoxin ; β-cyclodextrin ; inclusion complex
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract The structure of the podophyllotoxin (P)/β-cyclodextrin(β-CD) inclusion complexhas been studied by infrared spectroscopy, UVspectroscopy, NMR spectroscopy and X-raydiffractometry. The association constant is 128 M-1in water, calculated from thestraight portion of the phase-solubility diagram.
    Type of Medium: Electronic Resource
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  • 10
    Publication Date: 2002-01-01
    Print ISSN: 1000-9116
    Electronic ISSN: 1993-1344
    Topics: Geosciences
    Published by Springer
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