Zobrazeno 1 - 10
of 35
pro vyhledávání: '"Jacob's staff"'
Publikováno v:
Journal of Sedimentary Research. 90:1572-1580
Accurate and quick high-resolution measurements of stratigraphic thicknesses and geologic profiles exposed in surface outcrops are critically important for interpreting depositional environments, basin development, and tectonic evolution. Therefore,
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::02ddd2c3f1a563684ace9ed1bd57a6cf
https://doi.org/10.2110/jsr.2020.092
https://doi.org/10.2110/jsr.2020.092
Autor:
Steven M. Holland, Anik K. Regan
Publikováno v:
Journal of Sedimentary Research. 90:669-672
A new Jacob's staff using 3D printed brackets, a laser pointer, and an iOS app is described here. The staff offers improved accuracy of sighting, especially in situations where the rock exposure is not in the direction of dip, or where a lateral offs
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9e422d9227ab6afe85d34ae75f361b29
https://doi.org/10.2110/jsr.2020.003
https://doi.org/10.2110/jsr.2020.003
Autor:
Marco Patacci
Publikováno v:
Sedimentary Geology. 335:66-69
A new Jacob's staff design incorporating a 3D positioning stage and a laser sighting stage is described. The first combines a compass and a circular spirit level on a movable bracket and the second introduces a laser able to slide vertically and rota
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3f30beb2bec04499e37d23f526e1de33
https://doi.org/10.1016/j.sedgeo.2016.02.001
https://doi.org/10.1016/j.sedgeo.2016.02.001
Autor:
Gad Freudenthal
Publikováno v:
Early Science and Medicine. 21:29-53
The cross-staff is an instrument for measuring angles, invented by Gersonides (1288–1344) in the 1330s. The Latin text describing it, written in 1342, refers to it as baculus Jacob. Between the fifteenth and the eighteenth century, this instrument
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::281cb9c7c6a1e8908337831b599970fe
https://doi.org/10.1163/15733823-00211p02
https://doi.org/10.1163/15733823-00211p02
Autor:
Robin Knox-Johnston
Publikováno v:
The Mariner's Mirror. 99:67-71
Prior to the introduction of the cross staff by the Portuguese about 1514, the only method of taking an altitude of a celestial body at sea was by use of the astrolabe or derivatives of it like the...
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e9536f339504268e3790e1917769134d
https://doi.org/10.1080/00253359.2013.766999
https://doi.org/10.1080/00253359.2013.766999
Autor:
Samuel Gessner
Publikováno v:
Early Science and Medicine. 18:124-152
Mathematical instruments in the early-modern period lay at the intersection of various knowledge traditions, both practical and scholarly. Scholars treated instrument-related questions in their works, while instrument makers and mathematical practiti
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6d32e891959388d872196c515d28871e
https://doi.org/10.1163/15733823-0005a0005
https://doi.org/10.1163/15733823-0005a0005
Autor:
B. S. Smith
Publikováno v:
International Journal of Nautical Archaeology. 39:172-181
Several pieces of cross-staffs have been found on the wreck of the Stirling Castle on the Goodwin Sands. One has been assembled from parts of staffs found when the wreck was first investigated, and is currently in the National Maritime Museum, Greenw
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8c9f85bec9e595b7cb38893ac1bc9ed6
https://doi.org/10.1111/j.1095-9270.2009.00245.x
https://doi.org/10.1111/j.1095-9270.2009.00245.x
Publikováno v:
The International Journal of Nautical Archaeology. 32:53-60
The article deals with a cross-staff discovered inside a wooden chest on the wreck site of the man-of-war Kronan (1676), located off the east coast of the island of Oland in the Baltic Sea. It is dated 166[1], and besides now being the earliest known
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::88d9d3c6032f3a8472dea96572d58f07
https://doi.org/10.1006/ijna.2003.1075
https://doi.org/10.1006/ijna.2003.1075
Publikováno v:
International Journal of Nautical Archaeology. 32:53-60
The article deals with a cross-staff discovered inside a wooden chest on the wreck site of the man-of-war Kronan (1676), located off the east coast of the island of Oland in the Baltic Sea. It is dated 166[1], and besides now being the earliest known
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b244df0d2395a63de1d59183f529dd66
https://doi.org/10.1111/j.1095-9270.2003.tb01431.x
https://doi.org/10.1111/j.1095-9270.2003.tb01431.x