Showing 761 - 780 results of 2,509 for search '"atomism"', query time: 0.06s Refine Results
  1. 761
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  5. 765

    Novel Derivatives of Phenylisoxazole-3/5-Carbaldehyde Semicarbazone: Synthesis, Characterization, and Computational Studies by Fernando Carrasco, Wilfredo Hernández, Oscar Chupayo, Rodolfo Pumachagua, Evgenia Spodine, Jackeline Mosquera, Olivio N. Castro, Jesus M. Rodilla, Celedonio M. Álvarez, Juan Z. Dávalos

    Published 2024-01-01
    “…The MEP descriptors indicate that the oxygen atom of the carbonyl group C=O is susceptible to electrophilic attack, while the hydrogen atoms of the amide and hydrazone fragments are sensitive to nucleophilic attack. …”
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  6. 766

    Absorption spectra of Nitrazine Yellow indicator. Experimental data and quantum chemical evaluations by Inna Khristenko, Volodymyr Ivanov

    Published 2024-06-01
    “…The standard 6-31+G(d,p) basis set is employed, along with combinations using pseudopotential basis sets for Na and S atoms. In the first variant of calculations, the LanL2DZ basis set (and corresponding pseudopotential) is used for all atoms within the molecules. …”
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  7. 767
  8. 768

    Fluctuations Driven by Multicomponent Pickup Ion Distributions in the Outer Heliosheath by Ameneh Mousavi, Vadim Roytershteyn, Federico Fraternale, Nikolai Pogorelov

    Published 2025-01-01
    “…The stability of a realistic multicomponent pickup ion (PUI) velocity distribution derived from a global model of neutral atoms in the heliosphere, which treats hydrogen and helium atoms self-consistently and includes equations for electrons and helium ions, is investigated using linear instability analysis and hybrid simulations. …”
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    On The Possible Leakage of ET-RR1 Liquid Waste Tank: Hydrological and Migration Modes Studies by N. S. Mahmoud, S. T. EL-Hemamy

    Published 2005-01-01
    “…The first Egyptian (ET-RR1) research reactor has been in operation since 1961 at the Egyptian Atomic Energy Authority (EAEA) Inshas site. Therefore, at present, it faces a serious problem due to aging equipment, especially those directly in contact with the environment such as the underground settling tanks of nuclear and radioactive waste. …”
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    Structural, Electronic, Elastic, Mechanical, and Opto-Electronic Properties for ZnAg2SnS4 and ZnAg2Sn0.93Fe0.07S4 Photocatalyst Effort on Wastewater Treatment through the First Pri... by Mohammad Jahidul Islam, Md. Sabbir Hasan Sohag, Unesco Chakma, Ajoy Kumer, Md. Monsur Alam, Mohammed Nazrul Islam Khan

    Published 2023-01-01
    “…When the Ge (ZnAg2GeS4) atom has been swapped out by a Sn (ZnAg2SnS4) atom, the changes in band gap is noticeable, which rises from 0.94 eV to 1.15 eV with the same geometry and surface area. …”
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  13. 773

    Research on network risk assessment based on attack graph of expected benefits-rate by Wenfu LIU, Jianmin PANG, Xin ZHOU, Nan LI, Feng YUE

    Published 2022-08-01
    “…As Internet applications and services become more and more extensive, the endless network attacks lead to great risks and challenges to the security of information systems.As a model-based network security risk analysis technology, attack graph is helpful to find the vulnerability between network nodes and the harm of being attacked.It has been proved to be an effective method to find and prevent network security risks.Attack graph is mainly divided into state-based attack graph and attribute-based attack graph.Due to the problem of state explosion in state-based attack graph, most researchers prefer the attribute-based attack graph for network risk assessment.In view of the existing researches on attribute-based attack graph, they excessively rely on the vulnerability of network nodes and the essential attributes of atomic attack.However, they ignore that rational attackers usually choose specific attack paths by maximizing attack benefits.Then, a network risk assessment framework and a quantification method of attack benefits-rate based on expected benefits-rate attack graph were proposed.The network risk assessment framework took the open vulnerability resource database, the new vulnerabilities found by the vulnerability mining system and the big data related to network attack and defense as the basic data source.The network risk assessment framework also took the open source big data platform as the analysis tool to mine and calculate the elements related to attack cost and attack benefit.Using the concepts of cost, benefit and benefit-rate in economics, the calculation model of expected benefit-rate of atomic attack was constructed.By constructing the attribute-based attack graph of the target network, the expected benefit-rate of atomic attack on the attack path was calculated, and the expected benefit-rate list of all possible attack paths was generated.Furthermore, taking the expected goal as the starting point, the search was carried out according to the specific optimization strategy (backtracking method, greedy algorithm, dynamic programming).And the complete attack path with the maximum benefit-rate was obtained, which provided the basis for network risk assessment.The simulation results show the effectiveness and rationality of the proposed expected benefit-rate attack graph network risk assessment method, which can provide support for discovering and preventing network security problems.…”
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    Synthesis and Antimicrobial Evaluation of Some Novel Trisubstituted s-Triazine Derivatives Based on Isatinimino, Sulphonamido, and Azacarbazole by Sonika Jain, Anamika Sharma, Meenakshi Agrawal, Swapnil Sharma, Jaya Dwivedi, D. Kishore

    Published 2013-01-01
    “…A study directed towards exploring the temperature-dependent reactivity of the chlorine atoms of 2,4,6-trichloro-s-triazine (TCT) in the nucleophilic displacement reaction, allowed a facile replacement of its chlorine atoms in succession with (i) N-amino methyl substituted isatin-3-hydrazones, (ii) N1-substituted-4-amino benzene sulphonamides, and (iii) 8-amino-4-oxo-N-benzyl-azacarbazole to produce the corresponding 2,4,6-trisubstituted-s-triazine, namely; 2-(N-amino methyl substituted isatin-3-hydrazinyl)-4-(N1-substituted-4′-amino benzenesulfonamidyl)-6-(8′-amino-4′-oxo-N-benzylazacarbazolyl)-1,3,5-triazine derivatives in acceptable yields. …”
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  17. 777

    A study of the effect of Mn on the precipitation and phase transition of nanoscale Cu-rich phase in Fe–Cu alloys by phase-field method by Mingguang Wei, Tongguang Zhai, Yong Xu, Yingming Tu, Haisheng Han

    Published 2025-03-01
    “…The results showed that, in the early stage of the precipitation, Mn and Cu atoms were first congregated to form Mn–Cu co-clusters, followed by Mn atoms separating from the co-clusters to segregate at the cluster-matrix interface to form a Cu-rich core and Mn-rich shell structure once the Cu content in the co-clusters reached 85%. …”
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  18. 778

    Valency-Based Descriptors for Silicon Carbides, Bismuth(III) Iodide, and Dendrimers in Drug Applications by Qi-Zhao Li, Abaid ur Rehman Virk, Kashif Nazar, Imran Ahmed, Iskander Tlili

    Published 2020-01-01
    “…Most of the proposed topological indices are related either to a vertex adjacency relationship (atom-atom connectivity) in the graph or to topological distances in the graph. …”
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  19. 779

    Incoherent dictionary learning and sparse representation for single-image rain removal by Hong-zhong TANG, Xiang WANG, Xiao-gang ZHANG, Xiao LI, Li-zhen MAO

    Published 2017-07-01
    “…The incoherent dictionary learning and sparse representation algorithm was present and it was applied to single-image rain removal.The incoherence of the dictionary was introduced to design a new objective function in the dictionary learning,which addressed the problem of reducing the similarity between rain atoms and non-rain atoms.The divisibility of rain dictionary and non-rain dictionary could be ensured.Furthermore,the learned dictionary had similar properties to the tight frame and approximates the equiangular tight frame.The high frequency in the rain image could be decomposed into a rain component and a non-rain component by performing sparse coding based learned incoherent dictionary,then the non-rain component in the high frequency and the low frequency were fused to remove rain.Experimental results demonstrate that the learned incoherent dictionary has better performance of sparse representation.The recovered rain-free image has less residual rain,and preserves effectively the edges and details.So the visual effect of recovered image is more sharpness and natural.…”
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  20. 780

    GROWTH OF SINGLE CRYSTALS, PHOTOELECTRIC PROPERTIES AND THE ABSORPTION EDGE OF A NEW LAYERED CuGa2.5In2.5S8 COMPOUND by ARAMA, Efim, PINTEA, Valentina, SHEMYAKOVA, Tatiana, GASITOI, Natalia

    Published 2024-09-01
    “…Using the criteria for the formation of new layered chalcogenides with octahedral and tetrahedral coordination of cations, it was hypothesized that due to the replacement of half of the In atoms in the CuIn5S8 spinel with Ga, which has a pronounced tendency to occupy the tetrahedral B sites in a denser packing of S atoms, a layered phase is formed. …”
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