Results 111 to 120 of about 5,253,598 (403)

Improvement on Effective Separation between Cadmium and Tin in Soil Samples for the Determination of Cadmium Isotopic Composition

open access: yesYankuang ceshi, 2016
In order to determine Cd isotopic composition accurately, the key is to guarantee Cd recovery and reduce Sn interference.The recoveries of Cd with various separation and purification methods reported by previous studies show a large range variation from ...
DUAN Gui-ling   +5 more
doaj   +1 more source

New geological models from the British Geological Survey [PDF]

open access: yes, 2015
Over the last decade many Geological Survey Organisations worldwide have begun to communicate their geological understanding of the subsurface through 3D geological models, and the traditional printed geological map has been increasingly phased out. This
Kessler, Holger, Mathers, Steve
core  

Predicting Materials Thermodynamics Enabled by Large Language Model‐Driven Dataset Building and Machine Learning

open access: yesAdvanced Intelligent Systems, EarlyView.
Illustration of text data mining of rare earth mineral thermodynamic parameters with the large language model‐powered LMExt. A dataset is built with mined thermodynamic properties. Subsequently, a machine learning model is trained to predict formation enthalpy from the dataset.
Juejing Liu   +6 more
wiley   +1 more source

Anglesey (Ynys Môn) : 600 million years of Welsh history [PDF]

open access: yes, 2011
Earth scientists from the British Geological Survey (BGS) are applying new techniques to advance our understanding of the geological evolution of Anglesey, North Wales, unravelling over 600 million years of Earth history.
Beamish, David   +2 more
core  

Sub‐Micrometer‐Precision Path Following of Piezo‐Actuated Mobile Robot

open access: yesAdvanced Intelligent Systems, EarlyView.
This article reports on the Holonomic‐Beetle (HB), a palm‐sized robot that achieves sub‐micrometer (sub‐µm) precision path tracking across spatial ranges from 100 µm to 10 mm. Using proportional‐integral‐derivative (PID) control, the HB accurately tracks both complex and straight paths with sub‐µm path errors, surpassing existing robots.
Eiji Kusui   +9 more
wiley   +1 more source

The Mountain Pass Rare-Earth Deposits [PDF]

open access: yes, 1954
Rare-earth minerals were discovered near Mountain Pass in northeastern San Bernardino County, Calif., in April 1949, and in the following year the Sulphide Queen carbonate body was found.
Olson, J. C., Pray, L. C.
core  

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