Results 121 to 130 of about 43,826 (248)

New Results From the Pre‐Pottery Neolithic Site of Al Uyaynah, Tabuk, in Northwestern Saudi Arabia

Arabian Archaeology and Epigraphy, EarlyView.
ABSTRACT Al Uyaynah is a low sandstone mound on an alluvial plain, long known for its extensive surface remains of stone‐built circular and rectangular structures. Following test excavations in 2012, more detailed excavation was undertaken in 2016 within one of the largest rectangular stone structures.
Khalid Alasmari, Stephanie F. Piper, Kirsten Grothe, W. Derek Hamilton, Delphine Joly, Penny Bickle, Geoff Bailey   +6 more
wiley   +1 more source

Study on the Explosion Mechanism of Low-Concentration Gas and Coal Dust

Fire
In coal mines, the mixture of coal dust and gas is more ignitable than gas alone, posing a high explosion risk to workers. Using the explosion tube, this study examines the explosion propagation characteristics and flame temperature of low-concentration ...
Li Liu, Xinyi Mao, Yongheng Jing, Yao Tang, Le Sun   +4 more
doaj   +1 more source

Mountain‐top spherules: Criteria to identify natural and synthetic particles

Meteoritics &Planetary Science, EarlyView.
Abstract Natural microspherules are important tracers of geologic and environmental processes in modern and ancient deposits. However, anthropogenic contamination can dilute natural collections by releasing synthetic microspherules into the environment.
M. R. Boyd, M. J. Genge
wiley   +1 more source

Modelling barriers for coal dust suppression [PDF]

, 1995
Airborne dust originating from the transport and storage of raw coal has detrimental effects on the environment. Warkworth Mining is seeking to reduce the dust emissions caused by the dumping of raw coal at their facility in Singleton, NSW. The suggested
Chan, D., Zhu, Z.
core  

Bed‐scale quantitative discrimination of hyperpycnites from intrabasinal turbidites—Results from a channelised slope system in the Upper Carboniferous Westward Ho! Formation, United Kingdom

Sedimentology, EarlyView.
ABSTRACT Features considered indicative of hyperpycnites and intrabasinal turbidites overlap. Outcrop study presented here suggests that the Westward Ho! Formation forms an 800 m high deepwater‐slope system dominated by hyperpycnites. Taking this unit, and other successions where hyperpycnites have been described, as having been deposited solely from ...
Tony Reynolds
wiley   +1 more source

Material handling systems for the fluidized-bed combustion boiler at Rivesville, West Virginia [PDF]

, 1977
The 300,000 lbs/hr steam capacity multicell fluidized-bed boiler (MFB) utilizes complex material handling systems. The material handling systems can be divided into the following areas: (1) coal preparation; transfer and delivery, (2) limestone handling ...
Branam, J. G., Rosborough, W. W.
core   +1 more source

Analytical model of brittle destruction based on hypothesis of scale similarity

, 2011
The size distribution of dust particles in nuclear fusion devices is close to the power function. A function of this kind can be the result of brittle destruction.
A. S. Arakcheev, A. V. Arzhannikov, A. V. Burdakov, B. B. Mandelbrot, C. E. Junge, D. Avnir, D. W. Boyd, D. W. Boyd, D. W. Boyd, D. W. Boyd, J. Feder, J. Linke, J. Linke, J. S. Mathis, J. Winter, J. Winter, K. Koga, K. V. Lotov, L. D. Landau, M. Borkovec, M. Rubel, O. V. Ogorodnikova, S. K. Friedlander, Y. Koza   +23 more
core   +1 more source

Research on dust control mechanism of coal baffle based on CFD-DPM model

Meikuang Anquan
The fully mechanized mining face is among the most critical areas for dust pollution within a mine, in large mining height faces, the elevated coal fall height during the mining process facilitates the dispersion of particulate matter from the coal ...
Zhenping WANG, Puhao WU, Hang WANG, Duo ZHANG   +3 more
doaj   +1 more source

The effect of short-term changes in air pollution on respiratory and cardiovascular morbidity in Nicosia, Cyprus. [PDF]

, 2007
Presented at the 6th International Conference on Urban Air Quality, Limassol, March, 2007. Short-paper was submitted for peer-review and appears in proceedings of the conference.This study investigates the effect of daily changes in levels of PM10 on the
Demokritou, Philip, Dockery, Douglas W., Kleanthous, Savvas, Kolokotroni, Ourania, Koutrakis, Petros, Middleton, Nicos, Schwartz, Joel D., Yiallouros, Panayiotis K.   +7 more
core   +1 more source

Development and Characterization of Mesoporous Activated Carbon From Cassia fistula Waste

Analytical Science Advances, Volume 7, Issue 1, June 2026.
ABSTRACT Waste derived from the Cassia fistula tree, including pods, leaves and bark, was used as a starting material for the synthesis of mesoporous activated carbon (M‐AC) through a single‐step chemical activation process. Characterization of the samples was confirmed by using SEM, XRD, BET, FTIR and EDX analysis.
Bushra Hafeez, Sami Ullah, Khyzar Hayat, Rabia Sattar, Gaurav Sanghvi, Neeraj Khare, Muhammad Afzaal, Hanisah Kamilah, Fakhar Islam, Catherine Tamale Ndagire   +9 more
wiley   +1 more source