Results 21 to 30 of about 11,118 (217)

Sheaf-Theoretic Stratification Learning from Geometric and Topological Perspectives [PDF]

open access: yes, 2020
In this paper, we investigate a sheaf-theoretic interpretation of stratification learning from geometric and topological perspectives. Our main result is the construction of stratification learning algorithms framed in terms of a sheaf on a partially ...
Brown, Adam, Wang, Bei
core   +3 more sources

Dynamic analysis of the SunDial, the rotatory Fresnel collector

open access: yesTHE INTERNATIONAL CONFERENCE ON BATTERY FOR RENEWABLE ENERGY AND ELECTRIC VEHICLES (ICB-REV) 2022, 2023
Magdalena Barnetche, Luis F. González-Portillo , Mercedes Ibarra, Rubén Barbero, Antonio Rovira, Rubén Abbas 1 PhD Candidate, Universidad Politécnica de Madrid, José Gutiérrez Abascal 2, 28006, Madrid, Spain, m.barnetche@upm.es 2 Universidad Politécnica ...
Magdalena Barnetche   +5 more
semanticscholar   +1 more source

A Study of the Yang-gyeong-gyu-il-ui (兩景揆日儀) in the Joseon Dynasty [PDF]

open access: yesJournal of Astronomy and Space Sciences, 2015
The Yang-gyeong-gyu-il-ui (兩景揆日儀) is a kind of elevation sundial using three wooden plates. Sang-hyeok Lee (李尙爀, 1810~?) and Byeong-cheol Nam (南秉哲, 1817~1863) gave descriptions of this sundial and explained how to use it in their Gyu-il-go (揆日考) and Ui-
Yong Sam Lee   +2 more
doaj   +1 more source

Die unvollendete Sonnenuhr von der Agora der Italiker auf Delos [PDF]

open access: yes, 2013
Only one case of an unfinished ancient sundial can be found in the scientific literature. Found on the Greek island of Delos, it was first reported in 1938, although the sundial was then later considered lost.
Fritsch, Bernhard   +2 more
core   +1 more source

Alessandra Pagliano. Le ore del sole. Geometria e astronomia negli antichi orologi solari romani

open access: yesDiségno, 2019
The book by Alessandra Pagliano grew out of research for the exhibition “Le ore del Sole” which took place from September 21st 2018 to January 31st 2019 at the Archaeological Museum of Naples (MANN), where twelve Greek-Roman sundial clocks were ...
Cristina Candito
doaj   +1 more source

Sundial Horizontal dalam Penentuan Penanggalan Jawa Pranata Mangsa

open access: yesUlul Albab: Jurnal Studi dan Penelitian Hukum Islam, 2018
Sundial sebagai instrumen astronomi bersejarah yang dapat digunakan dalam menyelesaikan masalah-masalah dasar astronomi. Penanggalan Jawa Pranata Mangsa yang penentuannya berdasarkan posisi Matahari menjadi hal yang dapat diperhitungkan.
Muhammad Himmatur Riza
doaj   +1 more source

New Inscriptions from Smyrna

open access: yesGephyra, 2021
The latest corpus of the inscriptions from Smyrna was published by Georg Petzl in Die Inschriften von Smyrna, Teil II,2: Addenda, Corrigenda und Indices, in series of Inschriften griechische Städte aus Kleinasien, volume 24,2, Bonn: Dr. Rudolf Habelt, in
Akın ERSOY, Ş. Recai TEKOĞLU
doaj   +1 more source

The Harold C. Ernst Collection of Portable Sundials [PDF]

open access: yes, 2014
A catalog of sundials from the Harold C. Ernst Collection of Portable Sundials, and a handy reference book on the subject of portable sundials. The sundial is the most ancient scientific instrument to come down to us unchanged.
Mayall, Margaret W., Mayall, R. Newton
core   +1 more source

Image of inverted World Tree on the stone slab and vessels of the Bronze Age [PDF]

open access: yesArchaeoastronomy and Ancient Technologies, 2016
The article presents the results of the study of petroglyphs on a unique stone slab discovered near the kurgan 1 of the kurgan field Varvarinsky I (Rostov Oblast, Russia).
Vodolazhskaya, L.N.   +2 more
doaj   +1 more source

Initial Plant Growth in Sand Mine Spoil Amended with Peat Moss and Fertilizer Under Greenhouse Conditions: Potential Species for Use in Reclamation [PDF]

open access: yes, 2012
The Great Lakes Basin exhibits the largest collection of freshwater sand dunes in the world. Sand dunes are ecologically important and support a unique assemblage of flora and fauna. Sand dunes are also economically valuable. However, when sand dunes are
Aschenbach, Todd A.   +5 more
core   +2 more sources

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