Results 21 to 30 of about 164 (152)

A bifacial paradise—The site of Ochtmissen, Germany, and its lithic assemblage in the context of the last glacial (early MIS 4) in the north‐central European Lowland

Boreas, EarlyView.
The Palaeolithic site of Ochtmissen (Lower Saxony, Germany) was excavated in fluvial terrace deposits during the winter of 1993/1994. The current study presents, for the first time, a thorough analysis of the lithic assemblage, encompassing its primary technological and typological characteristics, as well as the type and age of the fluvial deposits ...
Gianpiero Di Maida, Jutta Winsemann, Markus Fuchs, Niklas von Soest, Thomas Terberger   +4 more
wiley   +1 more source

Reclaimed Well Sites on Salt Affected Soils: Electrical Conductivity and Sodium Adsorption Ratio as Plant Community Response Indicators

Land Degradation &Development, Volume 37, Issue 13, Page 9114-9125, 15 August 2026.
ABSTRACT Salt affected soils are common worldwide, resulting from natural causes and anthropogenic activities. Saline and sodic soils often occur in association with oil and gas production, impacting soil properties which can impede vegetation growth and development.
Laura Bony, Amalesh Dhar, Sarah R. Wilkinson, M. Anne Naeth   +3 more
wiley   +1 more source

CREATION OF PORTABLE DOWNHOLE HAMMERS FOR ROTARY-PERCUSSIVE DRILLING OF BOREHOLES

Interexpo GEO-Siberia, 2021
This paper presents the design of portable downhole hammers for borehole diameters of 43 and 76 mm when drilling with a combined rotary-percussive method in coal mines. The scope of use is described. Features and advantages of prototypes are shown. The characteristics of DHH and research data are given.
Sergey E. Alexeev, Bakyt Kubanychbek, Alexander Yu. Primychkin   +2 more
openaire   +1 more source

Design, test, and verification of in-situ condition preserved coring and analysis system in lunar-based simulation environment

International Journal of Mining Science and Technology
The lunar surface and its deep layers contain abundant resources and valuable information resources, the exploration and exploitation of which are important for the sustainable development of the human economy and society.
Haichun Hao, Mingzhong Gao, Yan Wu, Zheng Gao, Yongcheng Li, Xuemin Zhou, Peng Chu, Xuan Wang, Jiahua Li, Lang Zhou, Jie Song, Tianxiang Ao, Yikun Yang   +12 more
doaj   +1 more source

The Sanitization of the Night: Gentrification and the Everyday Temporal Politics in Belgrade

City &Society, Volume 38, Issue 2, August 2026.
ABSTRACT Urban scholarship increasingly recognizes that processes such as gentrification unfold not only through spatial transformations, but through shifts in sensory environments and everyday rhythms. In this paper, drawing on twenty‐three months of fieldwork in Belgrade, I examine how urban redevelopment (re)organizes time for middle‐class people ...
Alexandra Dantzer
wiley   +1 more source

Influence of Matrix Hardness and Diamond Parameters on the Performance of Impregnated Diamond Bits During Rotary-Percussive Drilling

Applied Sciences
Rotary-percussive drilling is extensively used for efficient hard rock breakage, and the performance of impregnated diamond bits (IDBs) is primarily governed by matrix characteristics and diamond parameters.
Zhiming Wang, Ningping Yao, Quanxin Li, Songcheng Tan, Longchen Duan, Jun Fang   +5 more
doaj   +1 more source

Static‐Guided Endodontics for Complex Intracanal Obstructions and Zirconia Post Removal: Report on Three Cases

Clinical Case Reports, Volume 14, Issue 7, July 2026.
ABSTRACT A standardized static‐guided framework integrating CBCT and intraoral scanning provides predictable, minimally invasive management for diverse intracanal obstructions. This unified digital workflow ensures precise root canal localisation in severe obliteration and conservative retrieval of fractured fiber or ultra‐hard posterior zirconia posts
Xinxuan Wang, Xuguang Li, Baicheng Yi
wiley   +1 more source

A Stepwise Approach to Managing Bilateral Maxillary Sinus Tracts: A Case Report

Clinical Case Reports, Volume 14, Issue 7, July 2026.
ABSTRACT This case report describes a rare presentation of bilateral intraoral sinus tracts of odontogenic origin associated with a maxillary right first molar (Universal #3). A key diagnostic challenge was differentiating an endodontic infection from vertical root fracture (VRF) in a previously treated tooth; no J‐shaped probing defect was detected ...
Ali Chamani, Maryam Forghani, Reza Shakiba, Arsalan Shahri   +3 more
wiley   +1 more source

Coral reef and mangrove interplay during Holocene sea level changes, Belitung Island, Indonesia

Earth Surface Processes and Landforms, Volume 51, Issue 7, July 2026.
The fate of mangroves and coral reefs during the ongoing sea level rise depends not only on our ability to preserve the ecosystems but also on their geological preconditioning. Therefore, strategies to preserve mangrove ecosystems, while undoubtedly essential, wecan only be successful if accounting for their geological history. Abstract Coral reefs and
Tubagus Solihuddin, Gino de Gelder, Dwi Amanda Utami, Frida Sidik, Rima Rachmayani, Marfasran Hendrizan, Sri Yudawati Cahyarini, Meggi Rhomadona Purnama, Dilruba Erkan, Millary Widiawaty, Mary Elliot, Laurent Husson   +11 more
wiley   +1 more source

Analysis and Improvement of the Rotary Percussion Drilling Tool in Oil Wells [PDF]

Proceedings of the 2015 International Symposium on Material, Energy and Environment Engineering, 2015
Experience over the few years has proved that rotary percussion technology is an effective method to improve the rate of penetration in drilling petroleum wells. The drilling speed of the rotary percussion drilling is about forty percent larger than the common drilling.
Huaigang Hu, Zhichuan Guan, Lingchao Xuan   +2 more
openaire   +1 more source