Results 71 to 80 of about 7,767,873 (255)

On the Motion of Short-Period Comets in the Neighbourhood of Jupiter [PDF]

open access: yesSymposium - International Astronomical Union, 1972
An intermediate orbit is developed for studying the hyperbolic jovicentric motion of a comet in the vicinity of Jupiter, where the effect of Jupiter's oblateness may become significant. A comparison is made with some of the results obtained by other investigators on the motions of specific periodic comets.
openaire   +1 more source

Physical Observations of the Short-Period Comet 1969 IV [PDF]

open access: yesSymposium - International Astronomical Union, 1972
The new short-period comet Churyumov-Gerasimenko, discovered by the authors on plates taken by the Kiev University cometary expedition to Alma-Ata in September 1969, was systematically photographed with fast telescopes at Byurakan and Alma-Ata until March 1970.
K. I. Churyumov, S. I. Gerasimenko
openaire   +1 more source

Studying Short-Period Comets and Long-Period Comets Detected by WISE/NEOWISE [PDF]

open access: yes, 2014
The Wide-field Infrared Survey Explorer (WISE) mission surveyed the sky in four infrared wavelength bands (3.4, 4.6, 12 and 22 μm) between January 2010 and February 2011.
Kramer, Emily
core  

Short-period Jupiter family comets after Stardust

open access: yes, 2008
The NASA Stardust mission has provided for laboratory study an extensive data set of cometary dust of known provenance (from comet 81P/Wild 2) yielding detailed insights into the composition of the comet.
Kearsley, Anton T., Burchell, Mark J.
core   +1 more source

Deubiquitinase USP38 Stabilizes PLK1 Expression to Boost DNA Damage Repair in Ovarian Cancer

open access: yesThe Kaohsiung Journal of Medical Sciences, EarlyView.
ABSTRACT Ovarian cancer (OC) is one of the most prevalent and severe gynecological malignant tumors. DNA damage repair (DDR) is essential in maintaining genome stability. This study aims to investigate the effects and mechanisms of USP38 and PLK1 on DNA damage repair and malignant behavior in OC cells.
Yuan Ma, Ying Li, Kai‐Li Li
wiley   +1 more source

Continuous Respiratory Oscillometry in Pediatric Laparoscopic Surgery—The COMET Study

open access: yesPediatric Anesthesia, EarlyView.
ABSTRACT Background Laparoscopic appendectomy is the accepted surgical approach for appendicitis in centers worldwide. Laparoscopic surgery requires the creation of a pneumoperitoneum to facilitate surgical access. Laparoscopic surgery affects the respiratory mechanics of patients under general anesthesia.
Neil Hauser   +9 more
wiley   +1 more source

Multiple Outbursts of Halley-type Comet 12P/Pons–Brooks

open access: yesThe Astronomical Journal
We present optical observations of the Halley-type comet 12P/Pons–Brooks (12P) on its approach to perihelion. The comet was active even in the first observations at ∼8 au.
David Jewitt, Jane Luu
doaj   +1 more source

Activity of 50 Long-Period Comets Beyond 5.2 AU [PDF]

open access: yes, 2016
Remote investigations of the ancient solar system matter has been traditionally carried out through the observations of long-period (LP) comets that are less affected by solar irradiation than the short-period counterparts orbiting much closer to the Sun.
Kelemen, János   +25 more
core   +1 more source

Single Versus Double Screw Extrusion: Impact on Mechanical Performance and Crack Resistance for a Virgin, Recycled, and Blended Polypropylene

open access: yesPolymer Engineering &Science, EarlyView.
Schematic overview of the study approach and key findings. ABSTRACT To evaluate the influence of extrusion on material performance, three processing methods, single extrusion (1x Ex), double extrusion (2x Ex), and double screw compounding (C), were investigated for virgin polypropylene (vPP), recycled PP (rPP), and a blend containing 10% rPP (rPP10 ...
J. Pötzlbauer   +8 more
wiley   +1 more source

A survey of debris trails from short-period comets [PDF]

open access: yes
We observed 34 comets using the 24 micron camera on the Spitzer Space Telescope. Each image contains the nucleus and covers at least 10^6 km of each comet\u27s orbit.
Sykes, Mark V.   +2 more
core   +1 more source

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