Results 11 to 20 of about 452,167 (280)
Structure and Conceptual Design of a Water-Hammering-Type Honsang for Restoration [PDF]
Journal of Astronomy and Space Sciences, 2012 We analyzed the manufacturing procedure, specifications, repair history, and details of celestial movements of the water-hammering type Honsang (celestial globe).
Yong Sam Lee, Sang Hyuk Kim
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Limited water stress modulates expression of circadian clock genes in Brachypodium distachyon roots
Scientific Reports, 2023 Organisms have evolved a circadian clock for the precise timing of their biological processes. Studies primarily on model dicots have shown the complexity of the inner timekeeper responsible for maintaining circadian oscillation in plants and have ...
Magdolna Gombos +6 more
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IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 2023 The continuity and accuracy of real-time (RT) global satellite navigation system (GNSS) sensing of atmospheric water vapor can be seriously affected by a lack of connectivity.
HaoJun Li, XiaoMing Li, Qi Kang
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A Study on the Internal Structure of Heumgyeonggaknu [PDF]
Journal of Astronomy and Space Sciences, 2013 Heumgyeonggaknu is a water-hammering type automatic water clock which was made by Jang Yeong-Sil in 1438. The water clock that is located in Heumgyeonggaknu consists of Suho which is equipped with 2-stage overflow.
Sang Hyuk Kim +3 more
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Historical development of water-powered mechanical clocks [PDF]
Mechanical Sciences, 2021 Abstract. This article examines the historical development of ancient water-powered mechanical clocks. The study begins with a comprehensive analysis and comparison of the different types of ancient clepsydra, their use and development and the development of their feedback systems, power systems, and time-reporting systems.
Z.-H. Hwang, H.-S. Yan, T.-Y. Lin
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The refined method for calculating the volume of a silver vessel from the Maykop kurgan [PDF]
Cultural Heritage and Modern TechnologiesThis article describes a method for calculating the volume of a silver vessel "with a rosette" from the Maikop burial mound using a refined geometric model. It is concluded that the calculated volume is close to the upper limit of the volume of the large
Vodolazhskaya L.N.
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Archaeoastronomy and Ancient Technologies, 2022 This article proposes a mathematical model of an inverted analemmatic sundial, provides formulas for calculating the coordinates of their hour markers.
Vodolazhskaya, L.N.
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Silver vessels - clepsydras from the Maykop kurgan [PDF]
Cultural Heritage and Modern TechnologiesThe article examines silver vessels from the excavations of the Maykop kurgan, analyzes the images on them, their sizes and shapes, and also provides calculations of the volume of one of the vessels.
Vodolazhskaya L.N.
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A Study on the Operation Mechanism of Ongnu, the Astronomical Clock in Sejong Era [PDF]
Journal of Astronomy and Space Sciences, 2011 Ongnu (Jade Clepsydra; also called Heumgyeonggaknu) is a water clock was made by Jang Yeong-sil in 1438. It is not only an automatic water clock that makes the sound at every hour on the hour by striking bell, drum and gong, but also an astronomical ...
Sang Hyuk Kim, Yong Sam Lee, Min Soo Lee
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Rhythms of Locomotion Expressed by Limulus polyphemus, the American Horseshoe Crab: I. Synchronization by Artificial Tides [PDF]
, 2008 Limulus polyphemus, the American horseshoe crab, has an endogenous clock that drives circatidal rhythms of locomotor activity. In this study, we examined the ability of artificial tides to entrain the locomotor rhythms of Limulus in the laboratory.
Chabot, Christopher C. +2 more
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