BACKGROUND A triad of deformities-thoracolumbar scoliosis, pelvic obliquity, and femoral head (hip) subluxation/dislocation-occurs frequently in non-ambulatory neuromuscular patients, but their close inter-relationship is infrequently appreciated or quantified. We propose a deformity documentation approach to assess each component simultaneously. METHODS The documentation assesses each compon...

OBJECTIVE Increase in ACL (anterior cruciate ligament) reconstructions has led to a higher prevalence of patients with postoperative symptoms which require investigation. We aimed to investigate the utility of magnetic resonance imaging (MRI) and computer tomography (CT) in determining tunnel size and graft obliquity after single bundle ACL reconstruction. PATIENTS AND METHODS A retrospective...

Introduction: Behaviors of the Martian climate system has been investigated in several studies [e.g., 1-4]. If the Martian climate was warm owing to the greenhouse effect of CO 2 in the past, a drastic climate change (climate jump or climate collapse) due to decrease in the amount of CO 2 in the system must have occurred during the evolution from a warm condition to the present cold condition [...

The Yarkovsky–O’Keefe–Radzievski–Paddack (YORP) effect is a thermal radiation torque that causes small objects to speed up or slow down their rotation and modify their spin vector orientation. This effect has important implications for spin dynamics of diameter D 50 km asteroids. In our previous work we developed an analytic theory for the component of the YORP torque that affects the spin rate...

Early Pleistocene glacial cycles in marine δO exhibit strong obliquity pacing, but there is a perplexing lack of precession variability despite its important influence on summer insolation intensity – the presumed forcing of ice sheet growth and decay according to the Milankovitch hypothesis. This puzzle has been explained in two ways: Northern Hemisphere ice sheets instead respond to insolatio...

0019-1035/$ see front matter 2011 Published by doi:10.1016/j.icarus.2010.09.002 ⇑ Corresponding author. Address: MS 183-301, Jet Oak Grove Drive, Pasadena, CA 91109, USA. E-mail addresses: [email protected] (B.G. B Nimmo). We examine models of secular variations in the orbit and spin poles of Ceres and Vesta, the two most massive bodies in the main asteroid belt. If the spin poles are fu...

[1] Variations in the Martian water and CO2 cycles with changes in orbital and rotational parameters are examined using the Geophysical Fluid Dynamics Laboratory Mars General Circulation Model. The model allows for arbitrary specification of obliquity, eccentricity, and argument of perihelion as well as the position and thickness of surface ice. Exchange of CO2 between the surface and atmospher...

BACKGROUND Sacral slanting is a frequent unique phenomenon in patients with adolescent idiopathic scoliosis (AIS) and may be important for selecting the distal fusion level. However, the reason of the phenomenon remains unknown. The purpose of this study was to determine the association between sacral slanting and adjacent structures in patients with AIS. METHODS A total of 303 AIS patients w...

[1] Although the origins of the 40,000-year glacial cycles during the early Pleistocene are readily attributed to changes in Earth’s obliquity (also having a 40,000-year period), the lack of ice-volume variability at precession periods (20,000 years) is difficult to reconcile with most parameterizations of the insolation forcing. It was recently proposed that precession’s influence on glaciatio...

We present the measured projected obliquity – the sky-projected angle between the stellar spin axis and orbital angular momentum – of the inner planet of the HAT-P-17 multi-planet system. We measure the sky-projected obliquity of the star to be λ = 19 −16 degrees by modeling the RossiterMcLaughlin (RM) effect in Keck/HIRES radial velocities (RVs). The anomalous RV time series shows an asymmetry...