Results 11 to 20 of about 98,138 (268)

Simulations of Accretion Powered Supernovae in the Progenitors of Gamma Ray Bursts [PDF]

, 2012
Observational evidence suggests a link between long duration gamma ray bursts (LGRBs) and Type Ic supernovae. Here, we propose a potential mechanism for Type Ic supernovae in LGRB progenitors powered solely by accretion energy.
Arnett, Balbus, Beloborodov, Beloborodov, Binney, Bisnovatyi-Kogan, Bisnovatyi-Kogan, Bloom, Burrows, Calder, Chen, Chieffi, Chornock, Christodoulou, Christopher C. Lindner, Cobb, Dessart, Di Matteo, Fryer, Fryxell, Fujimoto, Galama, Garnavich, Hamuy, Heger, Hjorth, Igumenshchev, Igumenshchev, Igumenshchev, Joggerst, Kasen, Kawabata, Khokhlov, Kohri, Kuhfuß, Landau, Lazzati, Lazzati, Lee, Limongi, Lindner, López-Cámara, López-Cámara, MacFadyen, MacFadyen, Malesani, Marek, Matheson, Mazzali, Mazzali, McKinney, Mezzacappa, Milosavljević, Miloš Milosavljević, Mirabal, Modjaz, Morsony, Morsony, Murphy, Murphy, Nagakura, Nagakura, Nagataki, Nordhaus, Nousek, O'Brien, O'Connor, Paczyński, Pawan Kumar, Perna, Podsiadlowski, Popham, Pruet, Pruet, Raskin, Reichart, Rongfeng Shen, Seitenzahl, Sekiguchi, Shakura, Soderberg, Stanek, Surman, Thompson, Thompson, Timmes, Wheeler, Woosley, Young, Zhang, Zimmerman   +90 more
core   +2 more sources

Effects of Nitride on the Tribological Properties of the Low Carbon Alloy Steel

Advances in Materials Science and Engineering, 2013
The technology of composite heat treatment is used popularly for low friction and wear resistance of drive elements. A large number of papers about the heat treatment technology had been proposed.
Yuh-Ping Chang, Jin-Chi Wang, Jeng-Haur Horng, Li-Ming Chu, Yih-Chyun Hwang   +4 more
doaj   +1 more source

Tracing chemical evolution over the extent of the Milky Way's Disk with APOGEE Red Clump Stars [PDF]

, 2014
We employ the first two years of data from the near-infrared, high-resolution SDSS-III/APOGEE spectroscopic survey to investigate the distribution of metallicity and alpha-element abundances of stars over a large part of the Milky Way disk.
Anders, Friedrich, Andrews, Brett H., Beers, Timothy C., Bird, Jonathan C., Bizyaev, Dmitry, Bovy, Jo, Brewington, Howard, Chiappini, Cristina, Cunha, Katia, Ebelke, Garrett, Feuillet, Diane, Frinchaboy, Peter M., Garcia-Hernandez, D. A., Ge, Jian, Hayden, Michael, Holtzman, Jon, Johnson, Jennifer A., Kinemuchi, Karen, Majewski, Steven R., Malanushenko, Elena, Malanushenko, Viktor, Marchante, Moses, Meszaros, Szabolcs, Minchev, Ivan, Nidever, David L., O'Connell, Robert W., Oravetz, Daniel, Pan, Kaike, Perez, Ana E. Garcia, Prieto, Carlos Allende, Rix, Hans-Walter, Robin, Annie C., Schiavon, Ricardo P., Schneider, Donald P., Shetrone, Matthew, Simmons, Audrey, Skrutskie, Michael F., Smith, Verne, Sobeck, Jennifer, Weinberg, David H., Wilson, John C., Zamora, O., Zasowski, Gail   +42 more
core   +3 more sources

Silicon micromachined electromagnetic microactuators for rigid disk drives [PDF]

, 1995
It is projected that by the year 2001, the disk drive industry will be shipping products with track density on the order of 25,000 tracks-per-inch, which would require a servo bandwidth of at least 3 kHz.
Desai, Amish, Miller, Raanan, Miu, Denny K., Tai, Yu-Chong, Tang, Weilong, Temesvary, Viktoria   +5 more
core  

Influence of Temperature on Scratch and Wear Properties of Technical Thermoplastics: Implications for Material Selection

Advanced Engineering Materials, EarlyView.
The share of technical thermoplastics is expected to grow further in the e‐mobility segment. In this study, a detailed temperature‐based tribological characterization of technical thermoplastics is performed. The tribological properties are discussed in terms of the dynamic mechanical properties of polymers at different ambient temperatures. A proof of
Harsha Raghuram, Thomas Koch, Vasiliki-Maria Archodoulaki   +2 more
wiley   +1 more source

Enhancing Log-Likelihood Ratios with Mutual Information on Three-Reader One-Track Detection in Staggered BPMR Systems

Applied Sciences
Because so much information is currently being shared online, there has been a sharp rise in the need for data storage devices over the past ten years. The main storage option is the hard disk drive (HDD), which is less expensive than some other types of
Natthakan Rueangnetr, Santi Koonkarnkhai, Piya Kovintavewat, Simon John Greaves, Chanon Warisarn   +4 more
doaj   +1 more source

Mechanical sequencer [PDF]

, 1977
A mechanical sequencer having a rotatable drive shaft is described. The drive shaft has a spline formed thereon. A freely rotatable shaft contains a plurality of rollers positioned thereon, the axis of the freely rotatable shaft having an axis parallel ...
Appleberry, W. T.
core   +1 more source

On the Deformation Behavior of Metastable CrMnNi Steels Processed by Directed Energy Deposition in Different Temperature Regimes

Advanced Engineering Materials, EarlyView.
In the present study, metastable CrMnNi steels with varying chemical compositions and a concomitantly altered stacking fault energy are processed via directed energy deposition and afterwards tested via tensile tests at different temperatures. The present study shows the influence of the manufacturing process on the elemental deformation mechanisms for
Julia Richter, Thomas Wegener, Florian Stredak, Gert Bartzsch, Steffen Scherbring, Javad Mola, Olena Volkova, Stefan Böhm, Thomas Niendorf   +8 more
wiley   +1 more source

The chemical abundances in the Galactic Centre from the atmospheres of Red Supergiants [PDF]

, 2008
The Galactic Centre (GC) has experienced a high degree of recent star-forming activity, as evidenced by the large number of massive stars currently residing there.
Asplund, Athanassoula, Ben Davies, Benjamin, Blum, Carr, Cunha, Cunha, Daflon, Davies, Don F. Figer, Figer, Figer, Figer, Francisco Najarro, Fulbright, Geballe, Grevesse, Güsten, Larsen, Larsen, Livia Origlia, Luck, Maness, Meléndez, Meynet, Najarro, Najarro, Origlia, Origlia, Origlia, Paumard, R. Michael Rich, Ramírez, Rich, Rich, Rolf-Peter Kudritzki, Rudolph, Zánmar Sánchez   +38 more
core   +2 more sources

Magnetoactive Metamaterials: A State‐of‐the‐Art Review

Advanced Engineering Materials, EarlyView.
Magnetoactive metamaterials combine magnetoactive composites with architected metastructures to enable contactless, tunable control of mechanical, acoustic, and elastic properties. This review highlights recent advances in their design, fabrication, and applications in soft robotics, biomedical devices, and adaptive structures and outlines future ...
Seyyedmohammad Aghamiri, Ramin Sedaghati
wiley   +1 more source