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Aim
This study aimed to describe the change in surgical practice and the impact of SARS‐CoV‐2 on mortality after surgical resection of colorectal cancer during the initial phases of the SARS‐CoV‐2 pandemic.
Method
This was an international cohort study of patients undergoing elective resection of colon or rectal cancer without preoperative suspicion of SARS‐CoV‐2. Centres entered data from their...
We present results from 27 impact experiments using porous (porosity ranging from 0.39 to 0.54) ice targets and solid ice projectiles at impact speeds ranging from 90 to 155 m/s. These targets were designed to simulate Kuiper Belt Objects (KBOs) in structure. We measured a specific energy for shattering, QS*, of 2.1×105 erg/g for those snowball targets hit by intact ice projectiles; this is of the...
Photometric observations of the minor planet (3782) Celle, which has been associated both dynamically and spectroscopically with the Vesta asteroid family, were obtained using the 1.8-m Vatican Advanced Technology Telescope during September 2001 and December 2002–January 2003. Analysis of these data reveals a normal rotational lightcurve (P=3.84h, amplitude =0.10–0.15mag). During the 2002–2003 run,...
We use a combination of scaling laws and direct hydrocode computations that include material strength to show that the impact energy needed to disperse an asteroid is greater than that to thoroughly shatter it for asteroids larger than about 400 m in radius. Thus, asteroids larger than this size should probably be considered to be gravitationally bound, but otherwise strengthless, rubble piles.
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