Results 11 to 20 of about 453,042 (281)
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
doaj +1 more source
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
doaj +1 more source
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
doaj +1 more source
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
openaire +3 more sources
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.
doaj +1 more source
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.
doaj +1 more source
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.
doaj +1 more source
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
doaj +1 more source
OBSTOOL: Software for Processing UTIG OBS Data [PDF]
, 1995 This report describes OBSTOOL, a graphical user interface that allows the user to process data collected by the Univesity of Texas at Austin Institute for Geophysics (UTIG) ocean bottom seismographs (OBSs).Institute for ...
Christeson, Gail
core +1 more source
Ancient Egyptian water-clocks: A reappraisal [PDF]
Journal of Archaeological Science, 1986 Abstract The Egyptian time system of dividing the night into 12 “hours” so that the length of the “hour” varied with the seasons made the perfection of any clock difficult. However, the flowerpot-shaped outflow water-clock possibly invented by a court official, Amenemhet, during the reign of Amenhotep I, had the potential of being accurate to within ...
B. Cotterell, F.P. Dickson, J. Kamminga
openaire +2 more sources