Results 121 to 130 of about 134,790 (308)
Frontiers in Marine ScienceUnmanned surface vehicles (USVs) offer significant value through their capability to undertake hazardous and time-consuming missions across water surfaces.
Hu Xu +7 more
doaj +1 more source
A comparison of FPS-16 and GMD-1 MEASUREMENTS and methods for processing wind data. Phase II - Analysis of time variability of atmospheric parameters Final report [PDF]
Comparison of FPS-16 and GMD-1 radar tracking and radiosonde measurements and methods for processing wind data - time variability of atmospheric ...
Danielsen, E. F., Duquet, R. T.
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Recent Advances in Stimulated Brillouin Scattering in Integrated Photonics
Advanced Physics Research, EarlyView.This review systematically surveys recent advances in stimulated Brillouin scattering (SBS) within integrated photonics. It begins by elucidating the fundamental mechanisms of stimulated coupling between photons and acoustic phonons in nanoscale waveguides, enhanced by the photoelastic and moving boundary effects.
Songyue Liu +8 more
wiley +1 more source
Inexpensive, large-diameter, radar tracking and calibration spheres [PDF]
, 1971 Plastic models of polystyrene beads are produced to within 0.02 cm accuracy, in various diameters designed to meet exact requirements of particular radar system frequency spectrum. They are inexpensive and do not require special handling imposed on metal
Holdren, R. H.
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Archaeological Prospection, EarlyView.ABSTRACT Satellite remote sensing is among the most significant modern methodologies supporting field archaeology. In addition to its efficiency in identifying archaeological sites, remote sensing offers a safe and cost‐effective approach in conflict zones.
Amal Al Kassem +5 more
wiley +1 more source
Nocturnal bird migration in opaque clouds [PDF]
The use of a tracking radar to measure the flight paths of migrating birds on nights with opaque clouds is discussed. The effects of wind and lack of visual references are examined.
Griffin, D. R.
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Archaeological Prospection, EarlyView.ABSTRACT In Upper Mesopotamia, the transition from the Pre‐Pottery Neolithic A (PPNA) to Pre‐Pottery Neolithic B (PPNB) period, ca. 10 800–10 600 cal. BP, is marked by a series of changes in chipped stone industries, architectural forms, symbolic objects, regional distribution of settlements and long‐distance exchange networks among others.
Toshihiro Tada +7 more
wiley +1 more source
Mariner II Deep Space Telecommunications [PDF]
, 1963 Two major telecommunication activities were in process during the Venus encounter of 1962, the largest, activity involved the two-way communications and tracking of the Mariner spacecraft from the DSIF (Deep Space Instrumentation Facility) stations on ...
core +1 more source
Archaeological Prospection, EarlyView.ABSTRACT Burial mounds are key elements of Mediterranean funerary landscapes, but in intensively cultivated coastal plains their low‐relief expression is easily obscured by ploughing, levelling and rapidly changing surface conditions, making single‐date observations unreliable.
Salvatore Polverino +2 more
wiley +1 more source
Archaeological Prospection, EarlyView.ABSTRACT Ancient Olympia was one of the most important sanctuaries and the venue for the Olympic Games in Greek and Roman times. Its remains are located in the Olympia Terrace (Peloponnese, Greece) at the present‐day confluence of the rivers Alpheios and Kladeos at the base of Mount Kronos.
Sarah Bäumler +10 more
wiley +1 more source