Results 131 to 140 of about 3,562,404 (304)

An optimization technique based on mechanical specific energy concept to improve drilling efficiency: a case study

Записки Горного института
For years attempts have been made in the drilling industry to increase the drilling efficiency and decrease the associated costs. The drilling efficiency can be evaluated by comparing applied energy, i.e., mechanical specific energy, with rock strength ...
Sajjad Khoshro, Seyyed Shahab Tabatabaee Moradi   +1 more
doaj  

Expedition 320/321 summary

, 2010
Integrated Ocean Drilling Program Expedition 320/321, "Pacific Equatorial Age Transect" (Sites U1331–U1338), was designed to recover a continuous Cenozoic record of the equatorial Pacific by coring above the paleoposition of the Equator at successive ...
Raffi, Isabella, Klaus, Adam, Edgar, Kirsty; id_orcid, Pälike, Heiko, Gamage, Kusali, Lyle, Mitchell, Nishi, Hiroshi   +6 more
core   +1 more source

Interface‐Mediated Catalysis for Improved Hydrogen Storage in Reactive Hydride Composites

Advanced Materials, EarlyView.
Catalyst–hydride interfaces are engineered in Co@C‐ and Ni@C‐modified 2LiH + MgB2 reactive hydride composites to accelerate hydrogen uptake and release. Multiscale scattering, in‐situ synchrotron radiation powder x‐ray diffraction and density functional theory calculations reveal the structural and electronic origin of the catalytic enhancement ...
Yuanyuan Shang, Pawan Kumar Soni, Han Ge, Weijie Yang, Fahim Karimi, Thi Thu Le, Tamás Simon, Michael Fröba, Jitendra Mata, Joshua King, Hai‐Wen Li, Thomas Klassen, Claudio Pistidda   +12 more
wiley   +1 more source

Proceedings of the Integrated Ocean Drilling Program 303/306: North Atlantic Climate

, 2006
<p>Expedition 303 was designed to sample and study strategic sites that record components of North Atlantic Pliocene–Quaternary climate, including the composition and structure of surface or bottom waters and detrital-layer stratigraphy ...
Shimada, Chieko, Mazaud, Alain, Stoner, Joseph S., Henderson, Samuel S., Kawamura, Noriko, Kulhanek, Denise K., Aboud, Essam, Malone, Mitchell J., Akimoto, Kazumi, Judge, Shelley, De Vernal, Anne, Harris, Robert N., Guyodo, Yohan J.B., Leigh, Sasha N.B., Liu, Chuanlian, Schiebel, Ralf, Ito, Masashi, Bailey, Ian, Zhai, Qiumin, Romero, Oscar E., de Abreu, Lucia, Wright, James D., Funakawa, Satoshi, Sierro Sanchez, Francisco Javier, Chiyonobu, Shun, Ferretti, Patrizia, Vasquez Esmerode, Estela, Ennyu, Atsuhito, Hodell, David A., Bartoli, Gretta, Hagino, Kyoko, Higgins, Sean M., Nanayama, Futoshi, Bjørklund, Kjell R., Hatakeda, Kentaro, Kanamatsu, Toshiya, Nielsen, Simon H.H., Obrochta, Stephen, Rashid, Harunur, Sato, Tokiyuki, Evans, Helen F., Stein, Ruediger, Grützner, Jens, Hefter, Jens Norbert, Kawamura, Kiichiro, Voelker, Antje, Robinson, Stuart A., Ohno, Masao, Fang, Nianqiao, Channell, James E.T., Damuth, John, Alvarez Zarikian, Carlos A., Krissek, Lawrence A., Acton, Gary D., Yamasaki, Makoto   +54 more
core   +1 more source

Photocatalytic Water Splitting on the Lunar Surface: Prospects for In Situ Resource Utilization

Advanced Materials Interfaces, EarlyView.
Water has been found in craters on the moon nearby locations which are illuminated >80% of the time. Photocatalysis uses energy from sunlight to drive chemical reactions such as water splitting to produce oxygen and hydrogen. It is a scalable technology that requires lighter equipment and utilizes resources available on the moon. ABSTRACT The discovery
Ranjani Kalyan, Thomas D. Small, Gregory F. Metha, Mahmoud Adel Hamza, Thomas J. O'Dea, Yideng Shen, Cameron J. Shearer   +6 more
wiley   +1 more source

Examination of intermittently decelerated feed drilling using polycarbonate [PDF]

, 2009
P(論文)At present in strictly economic and environmental situations, the improvement of production efficiency and environmental bad influence is the actual subject in a drilling process.
沖田, 耕三, サクライ, ケイゾウ, ADACHI Katushige, SAKURAI Keizo, 小堀, 修身, アダチ, カツシゲ, コボリ, オサミ, YOSHIKAWA Akira, ヨシカワ, アキラ, OKITA Kozo, 吉川, 晃, オキタ, コウゾウ, KOBORI Osami, 櫻井, 恵三, 足立, 勝重   +14 more
core  

Proceedings of the Integrated Ocean Drilling Program 310: Tahiti Sea Level

, 2007
<p>Integrated Ocean Drilling Program (IODP) Expedition 310 to the reef terraces around Tahiti, French Polynesia objectives are to establish the course of last deglacial sea level rise at Tahiti, to define sea-surface temperature variations for the ...
de Olivera Vasconcelos, Crisogono, Verwer, Klaas, McInroy, David, Cole, Julia E., Yokoyama, Yusuke, Braaksma, Hendrik, Lund, Steve P., Castillo, Paterno, Cabioch, Guy, Hathorne, Ed C., Webster, Jody M., Camoin, Gilbert F., Yamada, Tsutomu, Matsuda, Hiroki, Sugihara, Kaoru, Machiyama, Hideaki, Iryu, Yasufumi, Felis, Thomas, Deschamps, Pierre, Thomas, Alex, Fujita, Kazuhiko, Fairbanks, Richard G., Cohen, Anne L., Westphal, Hildegard, Asami, Ryuji, Woo, Kyung Sik   +25 more
core   +1 more source

Ti3C2Tx MXene/Silver Composite Foams For Lightweight, High‐Performance Electromagnetic Interference Shielding and Joule Heating

Advanced Materials Interfaces, EarlyView.
Ultrathin MXene/EMF composite foams achieve a specific shielding efficiency of 749.6 dB.dB·cm3$\mathrm{dB}\cdot {\mathrm{cm}}^{3}$/g, while the silver‐enhanced MXene/Ag/EMF reaches 81.4 dB shielding effectiveness at just 1.0 mm thickness. Both composites exhibit rapid Joule heating, retain stability up to 250∘C$^\circ{\rm C}$, and withstand 1000 ...
Abdullah A. Mahmood, Mingxuan Li, Vahid Rad, Mehdi Zarei, Chen‐Yu Yeh, Masoud Soroush, Guangyong Li, Paul W. Leu   +7 more
wiley   +1 more source

METODOLOGÍA PARA LA OPTIMIZACIÓN DE PARÁMETROS DE PERFORACIÓN A PARTIR DE PROPIEDADES GEOMECÁNICAS

Revista Fuentes El Reventón Energético, 2012
Drilling optimization is focused on time operational cost reduction. This can be accomplished from the evaluation of drilling parameters used during offset wells drilling and the development of continuous improvement programs and performance efficient ...
Diego Fernando Suárez, Helmut Esteban Portilla, Reinel Corzo Rueda   +2 more
doaj  

From the Discovery of the Giant Magnetocaloric Effect to the Development of High‐Power‐Density Systems

Advanced Materials Technologies, EarlyView.
The article overviews past and current efforts on caloric materials and systems, highlighting the contributions of Ames National Laboratory to the field. Solid‐state caloric heat pumping is an innovative method that can be implemented in a wide range of cooling and heating applications.
Agata Czernuszewicz, Yaroslav Mudryk, Jun Cui, Lucas Griffith, Duane D. Johnson, Julie Slaughter   +5 more
wiley   +1 more source