Showing 961 - 980 results of 21,052 for search '"Physics"', query time: 0.16s Refine Results
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    A Survey of Secure Communications for Satellite Internet Based on Cryptography and Physical Layer Security by Yu Zhang, Shuangrui Zhao, Ji He, Yuanyu Zhang, Yulong Shen, Xiaohong Jiang

    Published 2023-01-01
    “…Based on different security mechanisms, we first categorize the existing works of secure communications in satellite internet into two categories: cryptography-based and physical layer security-based. The former includes classical encryption-based and quantum encryption-based secure communication, and the latter is further divided into precoding-based, cooperative jamming-based, relay selection-based, and physical-layer authentication-based secure communication depending on the applied techniques. …”
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    A Review of the Effects of Physical Activity and Exercise on Cognitive and Brain Functions in Older Adults by Louis Bherer, Kirk I. Erickson, Teresa Liu-Ambrose

    Published 2013-01-01
    “…Studies supporting the notion that physical activity and exercise can help alleviate the negative impact of age on the body and the mind abound. …”
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    Determining Physical Characteristics of Watersheds in Artvin Province Using SRTM and Topographic Map Data by Saim Yıldırımer, Mehmet Özalp, Esin Erdoğan Yüksel

    Published 2016-09-01
    “…With such programs, some physical characteristics of watersheds including borders, land use, drainage system, slope and elevation can be determined in a quick, detailed and reliable way. …”
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    Model OLD0: A Physical Parameterization for Clear-Sky Downward Longwave Radiation by Juan Carlos Ceballos, Diego Pereira Enoré, Jaidete Monteiro de Souza, Francisco Luiz Leitão de Mesquita

    Published 2025-01-01
    “…It is presented a simple yet consistent physically-based model (hereafter denoted by OLD0), suitable for estimation of DLF0 at ground level. …”
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    Physical and mechanical properties of the stem and branch wood of West African ebony (Diospyros mespiliformis) by Joseph Zakaria, Francis Kofi Bih, Issah Chakurah, Kwaku Antwi, Clara Lily Korkor Tetteh

    Published 2024-12-01
    “… This study examines the physical and mechanical properties of the sapwood and heartwood of the stem and branch wood of the West African ebony (Diospyros mespiliformis) to determine if the branch wood can be used for various products. …”
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    A Pre and Postnatal Physical Therapy Protocol for Recreational Athletes: A Case Series by Rachel Selman, Kate S. Early

    Published 2024-08-01
    “…International Journal of Sports Physical Therapy…”
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    The Impact of Physical Activity on Disability Incidence among Older Adults in Mexico and the United States by Kerstin Gerst, Alejandra Michaels-Obregon, Rebeca Wong

    Published 2011-01-01
    “…We explore the impact of physical activity on the disablement process among elders in Mexico compared to the USA. …”
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    Physical Simulation of Colayer Water Flooding in Low Permeability Carbonate Reservoir in Middle East by Xingwang Shi, Zhengming Yang, Yapu Zhang, Guangya Zhu, Qianhua Xiao

    Published 2017-01-01
    “…To study the flow mechanism under different displacement modes of low permeability carbonate reservoir in the Middle East and to improve the utilization of various types of reservoirs, the physical simulation experiments of water flooding by different displacement methods were carried out. …”
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