Results 111 to 120 of about 4,930 (232)

Use of corrective inserts to improve characteristics of the 100 ton shale storage bins

, 2022
Technical memorandum no. 67 - 32.The primary object of the Anvil Points Oil Shale Research Center Technical memorandum is to advise authorized personnel employed by the Participating Parties (1) that various activities are in progress or that certain ...

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Retorting costs for a 50,000 B/CD oil shale processing complex

, 2022
Technical memorandum no. 67-39.These technical memoranda pertain to work performed at Anvil Points.The United States Bureau of Mines facility at Anvil Points, near Rifle, Colorado, was reactivated starting in May 1964 and was operated during 1965, 1966 ...

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Prediction of formation abrasiveness under the action of a PDC bit based on the fractal dimension of a rock surface

Scientific Reports
During rock drilling, a drill bit will wear as it breaks the rock. However, there is no uniform grading standard for rock abrasiveness. To solve this problem, the wear mechanisms of a polycrystalline diamond compact (PDC) bit and the formation it is ...
Changhao Wang, Shaojie Li, You Li, Lidong Hou, Jinsong Bai, Qianwen Feng, Zhaoyi Liu   +6 more
doaj   +1 more source

Pore Pressure Prediction for High-Pressure Tight Sandstone in the Huizhou Sag, Pearl River Mouth Basin, China: A Machine Learning-Based Approach

Journal of Marine Science and Engineering
A growing number of large data sets have created challenges for the oil and gas industry in predicting reservoir parameters and assessing well productivity through efficient and cost-effective techniques.
Jin Feng, Qinghui Wang, Min Li, Xiaoyan Li, Kaijin Zhou, Xin Tian, Jiancheng Niu, Zhiling Yang, Qingyu Zhang, Mengdi Sun   +9 more
doaj   +1 more source

Photosynthetic primary production in the Mesoproterozoic

New Phytologist, Volume 251, Issue 1, Page 64-80, July 2026.
Summary The Mesoproterozoic atmosphere had more CO2 and less O2 than at present. While the upper ocean was oxygenated, the deeper ocean was euxinic or ferruginous. Primary production was performed by Chlorobia, Cyanobacteria, Proteobacteria, and Archaeplastida.
Patricia Sánchez‐Baracaldo, John A. Raven   +1 more
wiley   +1 more source

Quantification of the Eocene–Oligocene transition in the Zagros Foreland Basin: Palaeogeographic control on sequence architecture and tectonic signal preservation

The Depositional Record, Volume 12, Issue 3, June 2026.
New bio‐sequence framework for the Eocene–Oligocene transition in Zagros. Geochemical data validate basin depth control on SB1 vs. SB2 boundaries. SEM‐EDS analyses confirm subaerial exposure versus continuous deposition. Sensitivity analysis quantifies sub‐10% uncertainty in stratigraphic interpretations. Resolves the Pyrenean orogeny's variable impact
Sahar Rokni, Vahid Ahmadi, Seyed Hamid Vaziri, Ali Aghanabati, Pooria Kianoush   +4 more
wiley   +1 more source

Origins Under the Blowtorch: Frequent Fire Shifts the Balance Between Sunda‐Origin and Sahul‐Origin Plant Species in a Tropical Savanna

Ecology and Evolution, Volume 16, Issue 6, June 2026.
We examined the effect of fire frequency on the composition of vegetation of different biogeographic origins, to understand how frequently an ecosystem can be subject to fire but still retain its evolutionary diversity. There was dramatic structural and biogeographic change in less than 20 years from dry tropical woodlands into savannas, creating ...
Susanna Rozsa Bryceson, John William Morgan   +1 more
wiley   +1 more source

Anvil Points oil shale research center administrative expense budget, stage II April 1966 to December 31, 1966

, 2022
Budget.The United States Bureau of Mines facility at Anvil Points, near Rifle, Colorado, was reactivated starting in May 1964 and was operated during 1965, 1966, and 1967.

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Habitat filtering and niche specialization of termite mound herbaceous flora in tropical dry woodlands

Ecosphere, Volume 17, Issue 6, June 2026.
Abstract Termite mounds (TMs) are characteristic micro‐ecosystems of tropical dry woodland landscapes. Although their effects on woody plant functional diversity and ecosystem functioning have been relatively well studied, herbaceous communities have received much less attention.
Jonas Yona Mleci, Pierre Meerts, Jason Vleminckx, Fidèle Cuma Mushagalusa, Bienvenu Bopeke, Mpibwe Kalenga, Thomas Drouet   +6 more
wiley   +1 more source

The Linear‐Leaved Dracaena Complex (Asparagaceae) in Borneo, With 13 New Species

Feddes Repertorium, Volume 137, Issue 2, June 2026.
ABSTRACT The Bornean Dracaena are morphologically diverse, enabling the recognition of a highly distinctive group here referred to as the “linear‐leaved Dracaena complex” which includes species with leaves that are grass‐like with ratios of blade length to maximum width > 10.
Pui Kiat Hoo, Sin Yeng Wong, Khoon Meng Wong   +2 more
wiley   +1 more source