Results 101 to 110 of about 305,177 (315)

Distribution and interaction between selected pharmaceuticals and hydrogeochemistry in Guadalhorce aquifer(South of Spain) [PDF]

, 2015
Management of water resources implies the study of their quality and in recent times one of the main drawbacks is the presence of non-regulated products, the so-called "Emerging Contaminants (EC)".
Candela Lledó, Lucila, Corada Fernández, Carmen, Gambero, Laura, Jiménez-Gavilán, Pablo, Urresti, Begoña, Vadillo-Perez, Iñaki   +5 more
core  

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

Advanced 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, Chihiro Sekine, Taiki Goto, Ryosuke Kinoshita, Yuko Nishimura, Shogen Sekiguchi, Satoshi Ando, Yuto Oishi, Yusuke Matsui, Ohmi Fuchiwaki   +9 more
wiley   +1 more source

Mechanism of Hydrogen Sulfide Generation and Prevention Strategies in Oil and Gas Fields: A Case Study of the Sickle Bay Operation Area

Asia-Pacific Journal of Chemical Engineering, EarlyView.
ABSTRACT To address the persistent exceedance of hydrogen sulfide (H2S) concentrations and the limited effectiveness of existing treatments in the Sickle Bay oil production area, this study deeply analyzes the mechanism of H2S generation in the Sickle Bay oil production area and proposes targeted prevention and control strategies. The results show that
Bo Lei, Yao‐long Li, Bao‐ping Bai, Xiang‐de Zhang, Guan‐tao Shi, Yong‐long Xie, Chen‐xiao Hou, Cong‐Yu Ke   +7 more
wiley   +1 more source

Normal background concentrations of contaminants in the soils of England : available data and data exploration [PDF]

, 2011
This draft report describes the completed Work Package 1 and 2 tasks of the Defra commissioned Science and Research Project SP1008 - Establishing data on normal/background levels of soil contamination in England.
Ander, E.L., Cave, M.R., Johnson, C.C., Palumbo-Roe, B.   +3 more
core  

Characterization and Modeling of Industrial Phosphoric Acids' Rheological Behavior: Impact of Magnesium Monoxide on Viscosity

Asia-Pacific Journal of Chemical Engineering, EarlyView.
ABSTRACT This study investigates the rheological behavior of industrial phosphoric acids (H3PO4) produced at the JORF–LASFAR phosphoric plant in Morocco, with P2O5 concentrations of 18%, 29%, 42%, and 54%. Rheological measurements were performed using a rotary cylinder rheometer over a shear rate range of 1–1000 s−1.
Hamza Belbsir, Abderrahim Benzaouia, Said Kounbach, Abdelghani Laamaoui, Said Laassiri, Khalil El‐Hami, Rachid Benhida   +6 more
wiley   +1 more source

Progress and challenges of big data research on petrology and geochemistry

Solid Earth Sciences, 2018
We are entering the era of big data, and big data achievements have benefited ordinary people. However, big data application in geochemistry research has not been really appreciated. Big data is a kind of method and a pattern of thought.
Shoutao Jiao, Qi Zhang, Yongzhang Zhou, Wanfeng Chen, Xinyu Liu, Gnanachandrasamy Gopalakrishnan   +5 more
doaj   +1 more source

Risk Estimation and Expert Judgment: The Case of Yucca Mountain [PDF]

, 1992
Professor Shrader-Frechette discusses factors responsible for acute disagreement between the federal government and Nevada citizens over potential Risks at Yucca Mountain and focuses on the use of expert judgment, concluding that some of them appear to ...
Shrader-Frechette, Kristin
core   +2 more sources

Semi‐automated assessment for NatureServe subnational conservation status ranks for state floras

Applications in Plant Sciences, EarlyView.
Abstract Premise Conservation status ranks measure the potential risk of extinction for species at global, national, and subnational levels, taking into account rarity, threats, and trends. These assessments are largely incomplete due to funding and resource limitations.
Julia H. Prins, Joey Shaw
wiley   +1 more source

Analysis of the Earned Value Management and Earned Schedule Techniques in Complex Hydroelectric Power Production Projects: Cost and Time Forecast

Complexity, 2019
All projects take place within a context of uncertainty. That is especially noticeable in complex hydroelectric power generation projects, which are affected by factors such as the large number of multidisciplinary tasks to be performed in parallel, long
P. Urgilés, J. Claver, M. A. Sebastián
doaj   +1 more source

A perspective from the Mesozoic: Evolutionary changes of the mammalian skull and their influence on feeding efficiency and high‐frequency hearing

The Anatomical Record, EarlyView.
Abstract The complex evolutionary history behind modern mammalian chewing performance and hearing function is a result of several changes in the entire skeletomuscular system of the skull and lower jaw. Lately, exciting multifunctional 3D analytical methods and kinematic simulations of feeding functions in both modern and fossil mammals and their ...
Julia A. Schultz
wiley   +1 more source