Showing 1,041 - 1,060 results of 2,510 for search '"atom"', query time: 0.07s Refine Results
  1. 1041
  2. 1042
  3. 1043

    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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  4. 1044
  5. 1045

    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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  6. 1046
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  8. 1048

    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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  9. 1049

    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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  10. 1050

    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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  11. 1051

    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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  12. 1052

    Structural Characterizations of Palladium Clusters Prepared by Polyol Reduction of [PdCl4]2− Ions by Loredana Schiavo, Lucrezia Aversa, Roberta Tatti, Roberto Verucchi, Gianfranco Carotenuto

    Published 2016-01-01
    “…The stabilizer performs the important role of nucleating agent for the Pd atoms with a fast phase separation, since palladium atoms coordinated to the polymer side-groups are forced at short distances during nucleation. …”
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  13. 1053

    Crystal structure and Hirshfeld surface analysis of 2-methylquinazolin-4(3H)-one hydrochloride by Muzaffar Davlatboev, Sevara Allabergenova, Fazliddin Zulpanov, Ubaydullo Yakubov, Akmaljon Tojiboev, Tulkinjon Sattarov

    Published 2025-02-01
    “…Except for two methyl H atoms, all atoms of the molecular cation are located about a mirror plane, making the quinazolinium moiety exactly planar. …”
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  14. 1054

    Progress on Waveguide-Integrated Graphene Optoelectronics by Jiaqi Wang, Zhenzhou Cheng, Xuejin Li

    Published 2018-01-01
    “…Graphene, a single layer of carbon atoms arranged in the form of hexagonal lattice, has many intriguing optical and electrical properties. …”
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  15. 1055

    Complements to the Theoretical Treatments of the Electron Collision with : An R-Matrix Approach by V. Stancalie

    Published 2013-01-01
    “…The calculated values for fine-structure levels are compared with the available experimental data in Atomic Structure Database of the National Institute for Standards and Technology. …”
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  16. 1056

    Enhanced Photoactivity of Fe + N Codoped Anatase-Rutile Nanowire Film under Visible Light Irradiation by Kewei Li, Haiying Wang, Chunxu Pan, Jianhong Wei, Rui Xiong, Jing Shi

    Published 2012-01-01
    “…The X-ray photoelectron spectroscopy measurements show that nitrogen and iron atoms are incorporated into the titania oxide lattice, and the UV-visible absorption spectra show that the codoping of iron and nitrogen atoms could extend the absorption to visible light region. …”
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  17. 1057

    A Comprehensive Study of Gamma-rays Shielding Features of Binary Compounds by Mahdi Eshghi, M.Reza Alipoor

    Published 2024-02-01
    “…In this review, we have calculated and analyzed the linear attenuation coefficient (LAC) and mass attenuation coefficients (MAC), half-value layer (HVL), tenth value layer (TVL), mean free path (MFP), and effective atomic number, effective electron density, equivalent atomic number and buildup factor. …”
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  18. 1058

    Performance comparison between the conventional and blade-designed two-fluid pressure nozzles via CFD simulation by Che-Hao Hsu, Hong-Ping Cheng, Yu-Cheng Chou, Guang-Xiang Liu, Hsu-Yu Chen, Chien-Hsun Lee, Chin-Chi Cheng

    Published 2025-02-01
    “…The research of the velocity distribution and atomization behavior of two nozzle designs provides insights into improving nozzle efficiency and suitability for various industrial spray applications. …”
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  19. 1059

    Possible Mechanisms of Relations between the Thermal Neutrons Field and Biosphere by Anton V. Syroeshkin, Irina V. Tarabrina, Mariya A. Morozova, Alla V. Marukhlenko, Igor A. Zlatskiy, Mariya P. Makarova

    Published 2020-01-01
    “…Trace element composition of cysts was assessed using the method of atomic absorption spectroscopy with electrothermal atomization and the Zeeman background correction.…”
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  20. 1060

    Blue photoluminescence from active carboxyl adatoms on nanoporous anodic alumina films by Sam Yeon Cho, Kangmo Yeo, Jin Woo Kim, Jin Ho Kwak, Deok-Yong Cho, Jae Hyuck Jang, Sukmin Jeong, Yong Chan Choi, Sang Don Bu

    Published 2025-01-01
    “…This study investigates the blue PL and its correlation with the atomic and electronic structures of the active aluminum surface using multiple theoretical and experimental methods. …”
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