Results 101 to 110 of about 2,706,829 (276)

Evaluation of Treatment Response of Calcified Nodules and Nodular Calcified Lesions Using Mean Density on Coronary Computed Tomography Angiography

Catheterization and Cardiovascular Interventions, EarlyView.
ABSTRACT Background Calcified nodules (CN) and nodular calcifications (NC) present significant challenges during percutaneous coronary intervention (PCI) because of their protruding morphology and high rigidity, which often result in inadequate stent expansion and suboptimal procedural outcomes.
Akito Setoguchi, Keita Iyama, Ryosuke Iwasaki, Saburo Kusumoto, Yoshiyuki Doi, Tatsuya Nunohiro, Masayoshi Takeno, Koji Maemura   +7 more
wiley   +1 more source

Metastable Magnetic Configurations and Their Significance for Solar Eruptive Events

The Astrophysical Journal, 2001
Solar flares and coronal mass ejections (CMEs) involve the sudden release of magnetic energy that can lead to the ejection from the Sun of large masses of gas with entrained magnetic field. In dynamical systems, such sudden events are characteristic of metastable configurations that are stable against small perturbations but unstable to sufficiently ...
Peter A. Sturrock, Mark Weber, Michael S. Wheatland, Richard Wolfson   +3 more
openaire   +1 more source

Coronary Perforation During Excimer Laser Angioplasty in a Patient With Prior Thoracic Radiotherapy

Catheterization and Cardiovascular Interventions, EarlyView.
ABSTRACT Background Management of heavily calcified coronary lesions remains challenging despite advances in plaque‐modifying technologies. Excimer laser coronary angioplasty (ELCA) is an effective adjunctive strategy with a low risk of no‐reflow. Case Summary A 75‐year‐old woman with non–ST‐segment elevation acute coronary syndrome and severe left ...
Francesco Maria Sparasci, Alessandro Cafaro, Dionigi Fischetti, Alessandro Mandurino‐Mirizzi   +3 more
wiley   +1 more source

Using Magma Mixing/Mingling Evidence for Understanding Magmatic Evolution at Mount Bidkhan Stratovolcano (South-East Iran) [PDF]

Journal of Sciences, Islamic Republic of Iran, 2010
Mount Bidkhan stratovolcano is located in the central Iranian volcanic belt. It is composed of several types of pyroclastic deposits, lava flows and intrusive bodies.
S Khalili Mobarhan
doaj  

The Rich Chemistry of Ionized Methanol With Sulfur Dioxide: Pathways to Prebiotic and Elusive Species in Earth's Atmosphere and Space

Chemistry – A European Journal, EarlyView.
The reaction between the methanol radical cation and sulfur dioxide is remarkably fast and forms several ionic and neutral products (HOSOH+, CH2OSO+, CH2OH+, CH2O, H2O, HSO2). The chemistry goes beyond simple proton or hydrogen transfer, revealing a close interaction between the two species, relevant to atmospheric and astrochemical environments where ...
Mauro Satta, Daniele Catone, Mattea Carmen Castrovilli, Antonella Cartoni   +3 more
wiley   +1 more source

Evaluation of Pre-eruptive Conditions for Cordon Caulle Rhyo-Dacitic Historic Eruptions [PDF]

, 2019
For better understanding of Plinian-hybrid eruptive events, I analyzed the variables that affect the pre-eruptive conditions of the latest three eruptive events of the Puyehue Cordon Caulle Volcanic Complex (PCCVC).
Mingo, Mauro Andres
core   +1 more source

Hidden Markov graphical models with state‐dependent generalized hyperbolic distributions

Canadian Journal of Statistics, EarlyView.
Abstract In this article, we develop a novel hidden Markov graphical model to investigate time‐varying interconnectedness between different financial markets. To identify conditional correlation structures under varying market conditions and accommodate shape features embedded in financial time series, we rely upon the generalized hyperbolic family of ...
Beatrice Foroni, Luca Merlo, Lea Petrella   +2 more
wiley   +1 more source

Structural controls on the subsurface fluid flow and seismicity after the 2014 eruption of Mt. Ontake, central Japan, inferred from dense seismic observations

Earth, Planets and Space
Numerous studies have addressed the disastrous 2014 phreatic eruption of Mt. Ontake, central Japan, but limited studies have reported its post-eruptive activity.
Yuta Maeda, Toshiko Terakawa, Shinichiro Horikawa   +2 more
doaj   +1 more source

Research progress and current status of dynamic wave propagation characteristics in rock mass: A review

Deep Underground Science and Engineering, EarlyView.
This review elucidates the velocity–dispersion–attenuation coupling mechanisms of wave propagation in rock masses, compares six representative models, and reveals how pressure, temperature, mineral composition, and anisotropy jointly control dynamic responses in complex geological media.
Jiajun Shu, Tao Li, Ruiqi Yuan, Yue Li, Bingni Wu, Bo Liu, Zhengding Deng, Galindo Rubén, Fausto Molina‐Gómez   +8 more
wiley   +1 more source

Detection of Rapid Coronal Hole Boundary Reconfigurations Using Correlation Dimension Mapping

The Astrophysical Journal
This study investigates how magnetic reconnection reshapes coronal-hole (CH) boundaries during eruptive events. Using high-cadence EUV and magnetogram observations from the Solar Dynamics Observatory on 2015 June 4, we apply correlation dimension mapping
Eduardo Flández, Vadim M. Uritsky, Judith T. Karpen, Pankaj Kumar, Víctor Muñoz   +4 more
doaj   +1 more source