Results 31 to 40 of about 32,395 (222)

The Pre-perihelion Evolution of the Activity of Comet C/2017 K2 (Pan-STARRS) during the Water Ice-line Crossover

The Astronomical Journal
Comets, relics from the early solar system, consist of dust and ice. The ice sublimates as comets approach the Sun, ejecting dust from their nuclei seen as activity.
Yuna G. Kwon, Stefano Bagnulo, Johannes Markkanen, Ludmilla Kolokolova, Jessica Agarwal, Manuela Lippi, Zuri Gray   +6 more
doaj   +1 more source

Ice, Ice, Maybe? Investigating 46P/Wirtanen’s Inner Coma for Icy Grains

The Planetary Science Journal, 2023
The release of volatiles from comets is usually from direct sublimation of ices on the nucleus, but for very or hyperactive comets other sources have to be considered to account for the total production rates.
Theodore Kareta, John W. Noonan, Walter M. Harris, Alessondra Springmann   +3 more
doaj   +1 more source

Research progress on biomarkers of traumatic brain injury

Animal Models and Experimental Medicine, EarlyView.
Traumatic brain injury: From primary insult to secondary neuroinflammation and degeneration. Abstract Traumatic brain injury (TBI) is a common disorder of the nervous system and has become a leading cause of death and disability worldwide, imposing a substantial burden on patients and their social circles. Its main symptoms include dyskinesia, language
Xuting Shen, Si Cheng, Shuyi Chen, Mengyue Wang, Tangying Li, Weicheng Xu, Yifan Zhang, Ping Yuan, Lei Shi   +8 more
wiley   +1 more source

Guidelines for Essential Trauma Care: Second Edition (2026)

World Journal of Surgery, EarlyView.
Injury is a major cause of death and disability globally, with the highest burden in low‐ and middle‐income countries (LMICs). Strengthening the organization and planning for trauma care (care of the injured) can improve care and lower mortality. In 2004, the International Association for Trauma Surgery and Intensive Care (IATSIC) and the World Health ...
Charles Mock, Timothy C. Hardcastle, Christine Gaarder, Amit Gupta, Adam Gyedu, Manjul Joshipura, Elmin Steyn, on behalf of the Essential Trauma Care revision author group, Valencia Adjei, Roger Alcock, Vanda Amado, Michael Boampong, Sanjeev Booi, Petra Brysiewicz, Corazon Cabanilla‐Manuntag, Cristiane de Alencar Domingues, Ghada Elhadari, Ranjith Nanda Ellawala, Sarnai Erdene, Ama Akoma Essuman, Jorge Esteban Foianini, Filippo Gatti, Armando Garcia Guererra, Greg Hynes, Adil Haider, Sandy Ingless, Balavenkata Jagannathan, Helen Jowett, Knut Magne Kolstadbråten, Sonja Krofak, Aireen Patricia Madrid, Tina Tomić Mahečić, Claude Martin, Daniel Ntogwrachu, Bisola Onajin‐Obembe, Nhobojit Roy, Andres Rubiano, Niisoja Mensah Torto, Ben Wachira, Meg Walmsley, Torben Wisborg, Elma Wong   +41 more
wiley   +1 more source

Lingering grains of truth around comet 17P/Holmes [PDF]

, 2014
Comet 17P/Holmes underwent a massive outburst in 2007 Oct., brightening by a factor of almost a million in under 48 hours. We used infrared images taken by the Wide-Field Survey Explorer mission to characterize the comet as it appeared at a heliocentric ...
Bauer, J. M., Grav, T., Kramer, E. A., Mainzer, A. K., Masiero, J. R., Stevenson, R.   +5 more
core   +3 more sources

Noble gases and nitrogen in material from asteroid Bennu

Meteoritics &Planetary Science, EarlyView.
Abstract We report the elemental and isotopic abundances of all stable noble gases (helium, neon, argon, krypton, and xenon) in eight particles from asteroid Bennu returned by NASA's OSIRIS‐REx mission. We also report nitrogen abundances and isotopic ratios that were analyzed alongside neon and argon in four additional Bennu particles.
B. Marty, L. Zimmermann, E. Füri, D. V. Bekaert, J. J. Barnes, A. N. Nguyen, H. C. Connolly, D. S. Lauretta   +7 more
wiley   +1 more source

Three-dimensional cometary dust coma modelling in the collisionless regime: strengths and weaknesses [PDF]

, 2007
Inverse coma and tail modelling of comets based on the method developed by Finson & Probstein is commonly used to analyse cometary coma images. Models of this type often contain a large number of assumptions that may not be constrained unless wide ...
Aspelund, Thor, Busch, Markus A., Cotch, Mary F., Eiriksdottir, Gudny, Gaksch, Martin, Grimnes, Guri, Grübler, Martin, Gudmundsson, Elias F., Gudnason, Vilmundur, Harris, Tamara B., Joakimsen, Ragnar, Jorde, Rolf, Kleber, Marcus E., Løchen, Maja-Lisa, Mathiesen, Ellisiv B., Mensink, Gert, März, Winfried, Njølstad, Inger, Pilz, Stefan, Rutters, Femke, Scheidt-Nave, Christa, Schirmer, Henrik, Thamm, Michael, Tomaschitz, Andreas, Wilsgaard, Tom   +24 more
core   +3 more sources

On positively charged dust in the coma of comet 67P

Monthly Notices of the Royal Astronomical Society, 2022
ABSTRACT Moment analysis of ion spectrograms measured by the Ion Composition Analyser (ICA) in the coma of comet 67P typically produces an ion number density estimate markedly lower than the number density of free electrons as measured by the Mutual Impedance Probe and the dual Langmuir Probe. While there are good reasons to distrust the
E Vigren, A I Eriksson, S Bergman
openaire   +1 more source

Body Size Trade‐Offs Underpin Reproductive Success and Thermal Stress Tolerance in an Invasive Pest, the Small Hive Beetle

Ecology and Evolution, Volume 16, Issue 5, May 2026.
Body size differences have widely been observed in adult small hive beetles (Aethina tumida Murray, SHBs), an invasive pest of honey bee colonies. We hypothesized that parental body size influences reproductive performance, progeny fitness, and stress tolerance in SHBs.
Bashiru Adams, Jian Chen, Esmaeil Amiri
wiley   +1 more source

Modeling Ice and Dust in Comet C/2017 K2 (Pan-STARRS)’s Coma

The Planetary Science Journal
C/2017 K2 (Pan-STARRS) is a long-period comet that has been active since 24 au inbound and likely as far out as 35 au, far beyond where the sublimation of water ice can power cometary activity.
Megan Firgard, Theodore Kareta
doaj   +1 more source