Results 11 to 20 of about 5,247,612 (307)

The Classification of Axial Deformity in Patients with Basilar Invagination

open access: yesOrthopaedic Surgery, 2022
Objective To summarize the variation types of the axis in patients with basilar invagination (BI), then propose a classification scheme of the axis deformity.
Qiting He   +10 more
doaj   +1 more source

Piercing axis-parallel boxes [PDF]

open access: yes, 2017
Let $\F$ be a finite family of axis-parallel boxes in $\R^d$ such that $\F$ contains no $k+1$ pairwise disjoint boxes. We prove that if $\F$ contains a subfamily $\M$ of $k$ pairwise disjoint boxes with the property that for every $F\in \F$ and $M\in \M$
Chudnovsky, Maria   +2 more
core   +2 more sources

Reconsidering the tectorial membrane: A morphological study

open access: yesJournal of Craniovertebral Junction and Spine, 2020
Background: Published descriptions of the tectorial membrane have been inconsistent. Descriptions vary from a simple ligamentous band extending between the axis and occiput to a more complex layered structure composed of bands of fibers.
Peter Grant Osmotherly, Darren A Rivett
doaj   +1 more source

Relationship between Soil Characteristics and Vegetation Types in Damghan [PDF]

open access: yesDesert, 2012
Relationships between soil factors and vegetation types in playa of Damghan was investigated. Six vegetationtypes including Artemisia.sieberi, Arundo.
M. Jafari   +4 more
doaj   +1 more source

Management of acute combined fractures of the atlas and axis: A retrospective study of two trauma centers

open access: yesJournal of Craniovertebral Junction and Spine, 2017
Background: Management of combination fractures of the atlas and axis varies from nonoperative immobilization to selective early surgical intervention. In this study, we present our experience in managing these injuries. Materials and Methods: Electronic
Joseph DiDomenico   +6 more
doaj   +1 more source

A motion-decomposition approach to address gimbal lock in the 3-cylinder open chain mechanism description of a joint coordinate system at the glenohumeral joint [PDF]

open access: yes, 2010
In this study, the standard-sequence properties of a joint coordinate system were implemented for the glenohumeral joint by the use of a set of instantaneous geometrical planes.
Amadi, HO, Bull, AMJ
core   +1 more source

Influence of machine topology and cross-coupling magnetic saturation on rotor position estimation accuracy in extended back-EMF based sensorless PM brushless AC drives [PDF]

open access: yes, 2007
The influence of the machine topology and dq-axis cross-coupling on the rotor position estimation error in an extended back-EMF based sensorless brushless AC drive is investigated by both finite element analysis and experimentally on four brushless AC ...
Bingham, Chris   +4 more
core   +1 more source

Unilateral Paracondylar-Epitransverse Neo-Articulation with Secondary Atlas-Axis Rotation Anomaly

open access: yesJournal of the Belgian Society of Radiology, 2019
Teaching point: Variants of the craniovertebral junction can be depicted and characterized on ...
Nick Janssen, Wouter Mebis, Jan Gielen
doaj   +1 more source

Imaging with two-axis micromirrors [PDF]

open access: yes, 2006
We demonstrate a means of creating a digital image by using a two axis tilt micromirror to scan a scene. For each different orientation we extract a single grayscale value from the mirror and combine them to form a single composite image. This allows one
Hicks, R. Andrew   +2 more
core   +3 more sources

ENDS consumption in students of higher education: Phenomenon on the rise during the COVID-19 pandemic

open access: yesTobacco Induced Diseases, 2022
Introduction The COVID-19 pandemic triggered transformations in the population’s lifestyles, including electronic nicotine delivery system (ENDS) consumption.
Diana C. Maldonado Viasús   +7 more
doaj   +1 more source

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