Results 61 to 70 of about 168,341 (157)

Internal Root Resorption in a Previously Endodontically Treated Maxillary Molar: Nonsurgical Retreatment With Cold Ceramic

Clinical Case Reports, Volume 14, Issue 9, September 2026.
ABSTRACT Internal root resorption in a previously endodontically treated maxillary molar is an exceptionally rare finding. This case demonstrates that CBCT is essential for accurate lesion characterization, and obturation with Cold Ceramic yielded a favorable short‐term radiographic stabilization at 15‐month follow‐up in the nonsurgical retreatment of ...
Ali Sharbatdar, Maryam Gharechahi, Paria Molaei   +2 more
wiley   +1 more source

Sedimentology and geochemistry of the recent sediments of the river system on Hurd Peninsula, Livingston Island, Antarctica

The Depositional Record, Volume 12, Issue 4, September 2026.
This study investigates the sedimentology and geochemistry of recent sediments from ephemeral river systems on Hurd Peninsula, Livingston Island, Antarctica. These systems are important for understanding sedimentary and geochemical processes in unique polar environments.
Yakup Çelik, Merve Özyurt, Raif Kandemir   +2 more
wiley   +1 more source

Proceedings of the Integrated Ocean Drilling Program 338: Stage 3: NanTroSEIZE Plate Boundary Deep Riser 2

, 2014
<p>As part of the NanTroSEIZE program, operations during Integrated Ocean Drilling Program (IODP) Expedition 338 were planned to extend and case riser Hole C0002F, begun during IODP Expedition 326 in 2010, from 856 to 3600 meters below seafloor ...
Jurado Rodriguez, Maria, Kameo, Koji, Masuda, Harue, Wu, Hung-Yu, Phillips, Stephen, Strasser, Michael, Fabbri, Olivier, Milliken, Kitty, Webb, Susanna, Schleicher, Anja, Geersen, Jacob, Sanada, Yoshinori, Hayashi, Hiroki, Saffer, Demian, Moe, Kyaw Thu, Hüpers, Andre, Kanamatsu, Toshiya, Shan, Yehua, Kanagawa, Kyuichi, Rashid, Harunur, Toczko, Sean, Tudge, Joanne, Maeda, Lena, Takeshita, Toru, Olcott, Katelyn, Heirman, Katrien, Esteban, Lionel, Motoyama, Isao, Underwood, Michael, Ramirez, Sebastian, Kido, Yukari, Wilson, Dean, Kitajima, Hiroko, Sawyer, Derek, Yamaguchi, Asuka, Song, Insun, Hammerschmidt, Sebastian, Oohashi, Kiyokazu, Toki, Tomohiro, Dugan, Brandon, Moore, Gregory, Mishra, Ravi, Skarbek, Robert   +42 more
core   +1 more source

Improving gas bubbles’ half life in foam drilling fluid [PDF]

, 2013
An underbalanced drilling using foam drilling fluid is one of the most effective solutions which are capable of preventing formation damage, differential sticking, or circulation lost.
Ismail, Ahmad Shamsulizwan, Mamat, Baihaqi, Mamat, Nur Suriani, Mamat, Mohd Baihaqi, Ismail, Issham, Kamis, Azmi, Ikhsan, Azman   +6 more
core   +1 more source

Study of the local forces along a drill edge – comparison of two methodologies [PDF]

, 2013
In aerospace applications, drilling is one of the most common operations. However, this machining stays complex and expensive, especially in hard to cut materials. Because of the closed aspect of the operation, the measure or evaluation of the phenomenon
M'SAOUBI, Rachid, ABRIVARD, Guillaume, POULACHON, Gerard, POUTORD, Antoine, ROSSI, FREDERIC   +4 more
core  

Proceedings of the Integrated Ocean Drilling Program 344: Costa Rica Seismogenesis Project, Program A Stage 2 (CRISP-A2)

, 2013
<p>The Costa Rica Seismogenesis Project (CRISP) was designed to elucidate processes that control nucleation and seismic rupture of large earthquakes at erosional subduction zones. The CRISP study area is located offshore the Osa Peninsula where the
Burkett, Ashley, Charpentier, Delphine, Sakaguchi, Arito, Vannucchi, Paola, Screaton, Elizabeth J., Petronotis, Katerina, Malinverno, Alberto, Hashimoto, Yoshitaka, Jovane, Luigi, Kutterolf, Steffen O., Saito, Saneatsu, Harris, Robert N., Diz, Paula, Hamahashi, Mari, Choi, Jiyoung, Millan, Cristina, Yan, Quanshu, Baxter, Alan T., Solomon, Evan A., Sandoval Gutierrez, Maria Isabel, Berg, Richard D., Smith-Duque, Christopher E., Martin, Kylara, Torres, Marta E., Straub, Susanne M., Heydolph, Ken, Uchimura, Hitomi, Zhao, Xixi, Yamamoto, Yuzuru, Kastner, Miriam, Tanikawa, Wataru, Kurz, Walter, Li, Yong Xiang, Nascimento, Debora B.   +33 more
core   +1 more source

Digital monitoring of rotary-percussive drilling with down-the-hole hammer for profiling weathered granitic ground

Journal of Rock Mechanics and Geotechnical Engineering
Rock and geotechnical engineering investigations involve drilling holes in ground with or without retrieving soil and rock samples to construct the subsurface ground profile.
Wendal Victor Yue, Siyuan Wu, Manchao He, Yafei Qiao, Zhongqi Quentin Yue   +4 more
doaj   +1 more source

Efficiency of percussive drilling of rock with dissipative joints

, 1990
The nonlinear dissipative spring mass (NDSM) model for a percussive drill rod joint of the coupling sleeve (CS) type has been implemented into a Modula-2 program with the aid of which percussive drilling of rock is simulated. Transmission and dissipation
Beccu, E.,, Lundberg, Bengt,
core   +1 more source

Propagation Characteristics of Bottomhole Cracks Created by the Percussive-Rotary Stepping Drilling ROP Improving Method

Shiyou jixie
In order to solve the problems of poor rock drillability,low rock-breaking efficiency and short service life caused by high hardness,high strength and stress concentration of bottomhole rock in deep formations,a new concept of ROP improvement by ...
Liu Yongwang, Liu Jiaxiong, Guan Zhichuan, Wang Huajian, Zhao Guoshan, Zhang Shuhui   +5 more
doaj  

Analysis and science-based compilation of the results of studying percussion-rotary underground slimhole digging

Известия Томского политехнического университета: Инжиниринг георесурсов, 2019
The relevance of the research is caused by the necessity of improving the engineering and technology of geological explorations and the energy and resource efficiency of drilling. The main aim of the research is to analyse and generalize research results
Anastasiya Viktorovna Shadrina, Lev Alekseevich Saruev   +1 more
doaj   +2 more sources