Results 11 to 20 of about 520,328 (352)

Transient Osteoporosis

open access: yesJournal of the American Academy of Orthopaedic Surgeons, 2008
Transient osteoporosis is characterized primarily by bone marrow edema. The disease most commonly affects the hip, knee, and ankle in middle-aged men. Its cause remains unknown. The hallmark that separates transient osteoporosis from other conditions presenting with a bone marrow edema pattern is its self-limited nature. Laboratory tests usually do not
Korompilias, A. V.   +3 more
openaire   +3 more sources

Fracture Initiation of an Inhomogeneous Shale Rock under a Pressurized Supercritical CO2 Jet

open access: yesApplied Sciences, 2017
Due to the advantages of good fracture performance and the application of carbon capture and storage (CCS), supercritical carbon dioxide (SC-CO2) is considered a promising alternative for hydraulic fracturing.
Yi Hu   +6 more
doaj   +1 more source

SubmilliJansky Transients in Archival Radio Observations [PDF]

open access: yes, 2007
[ABRIDGED] We report the results of a 944-epoch survey for transient sources with archival data from the Very Large Array spanning 22 years with a typical epoch separation of 7 days.
Alberto Bolatto   +11 more
core   +2 more sources

Terminal Transient Phase of Chaotic Transients

open access: yesPhysical Review Letters, 2018
Transient chaos in spatially extended systems can be characterized by the length of the transient phase, which typically grows quickly with the system size (supertransients). For a large class of these systems, the chaotic phase terminates abruptly, without any obvious precursors in commonly used observables.
Lilienkamp, T., Parlitz, U.
openaire   +4 more sources

Effects of Nozzle Configuration on Rock Erosion Under a Supercritical Carbon Dioxide Jet at Various Pressures and Temperatures

open access: yesApplied Sciences, 2017
The supercritical carbon dioxide (SC-CO2) jet offers many advantages over water jets in the field of oil and gas exploration and development. To take better advantage of the SC-CO2 jet, effects of nozzle configuration on rock erosion characteristics were
Man Huang   +6 more
doaj   +1 more source

An InGaN/GaN Superlattice to Enhance the Performance of Green LEDs: Exploring the Role of V-Pits

open access: yesNanomaterials, 2018
Despite the fact that an InGaN/GaN superlattice (SL) is useful for enhancing the performance of a GaN-based light-emitting diode (LED), its role in improving the efficiency of green LEDs remains an open question. Here, we investigate the influence of a V-
Mengling Liu   +6 more
doaj   +1 more source

Classification methods for noise transients in advanced gravitational-wave detectors [PDF]

open access: yes, 2015
Noise of non-astrophysical origin will contaminate science data taken by the Advanced Laser Interferometer Gravitational-wave Observatory (aLIGO) and Advanced Virgo gravitational-wave detectors.
Cavaglia, Marco   +4 more
core   +2 more sources

Insights Into the Influence of Sidewall Morphology on the Light Extraction Efficiency of Mini-LEDs

open access: yesIEEE Photonics Journal, 2019
We systemically investigated the influence of sidewall morphology change based on TMAH etching on the optical performance of mini-LEDs. The dominant feature of prism structures on the sidewall of mini-LEDs with TMAH etching treatment varied from ...
Bin Tang   +5 more
doaj   +1 more source

Effect of Dielectric Distributed Bragg Reflector on Electrical and Optical Properties of GaN-Based Flip-Chip Light-Emitting Diodes

open access: yesMicromachines, 2018
We demonstrated two types of GaN-based flip-chip light-emitting diodes (FCLEDs) with distributed Bragg reflector (DBR) and without DBR to investigate the effect of dielectric TiO2/SiO2 DBR on optical and electrical characteristics of FCLEDs.
Shengjun Zhou   +6 more
doaj   +1 more source

The volumetric rate of calcium-rich transients in the local universe [PDF]

open access: yes, 2018
We present a measurement of the volumetric rate of `calcium-rich' optical transients in the local universe, using a sample of three events from the Palomar Transient Factory (PTF).
Frohmaier, C.   +3 more
core   +3 more sources

Home - About - Disclaimer - Privacy