scholarly journals Automated Real-Time Evaluation of Condylar Movement in Relation to Three-Dimensional Craniofacial and Temporomandibular Morphometry in Patients with Facial Asymmetry

Sensors ◽  
2021 ◽  
Vol 21 (8) ◽  
pp. 2591
Author(s):  
Won-June Lee ◽  
Ki-Ho Park ◽  
Yoon-Goo Kang ◽  
Su-Jung Kim
Keyword(s):  
Factor Analysis ◽  
Real Time ◽  
Tracking System ◽  
Three Dimensional ◽  
Facial Asymmetry ◽  
Craniofacial Morphology ◽  
Functional Movement ◽  
Mandibular Asymmetry ◽  
System A ◽  
Condylar Movement

The aim of this study was to investigate the correlation between craniofacial morphology, temporomandibular joint (TMJ) characteristics, and condylar functional movement in patients with facial asymmetry using an up-to-date automated real-time jaw-tracking system. A total of 30 patients with mandibular asymmetry and prognathism were included. Three-dimensional (3D) craniofacial and TMJ morphometric variables were analyzed in images captured using cone-beam computed tomography. Three-dimensional condylar movements were recorded during the opening, protrusion, and laterotrusion of the jaw and divided into those for deviated and non-deviated sides. Overall functional and morphometric variables were compared between the sides by a paired t-test. Pearson’s correlation analysis and factor analysis were also performed. As a result, significant differences were found between the sides in morphometric and functional variables. The condylar path length was significantly longer and steeper on the deviated side during protrusion and lateral excursion. TMJ morphometric asymmetry, more so than the craniofacial morphologic asymmetry, seemed to be reflected in the functional asymmetry, representing different correlations between the sides, as supported by factor analysis. This study provides evidence explaining why the asymmetric condylar path remained unchanged even after orthognathic surgery for the correction of craniofacial asymmetry.

Attributes for Executing Change in an Agile Information System

2015 ◽  
Vol 6 (2) ◽  
pp. 30-58 ◽  
Author(s):  
Pankaj Chaudhary ◽  
Micki Hyde ◽  
James A Rodger
Keyword(s):  
Information System ◽  
Factor Analysis ◽  
Information Systems ◽  
Real Time ◽  
Exploratory Factor Analysis ◽  
System A ◽  
Current Topic ◽  
Definition Of ◽  
A Current

Information Systems (IS) agility is a current topic of interest in the IS industry. The study follows up on work on the definition of the construct of IS agility and attributes for sensing and diagnosis in an agile IS. IS agility is defined as the ability of an IS to sense a change in real time; diagnose it in real time; and select and execute an action in real time. This paper explores the attributes for selecting and executing a response in an Agile Information System. A set of attributes were initially derived using the practitioner literature and then refined using interviews with practitioners. The attributes' importance and validity was established using a survey of the industry. All attributes derived in this study were deemed pertinent for selecting and executing a change in an agile information system. Dimensions underlying these attributes were identified using Exploratory Factor Analysis. This list of attributes can form the basis for assessing and establishing execution mechanisms to increase IS Agility.

scholarly journals The correlation study on mandibular deviation and cervical vertebrae posture in patients with mandibular asymmetry

2021 ◽  
Author(s):  
Yuxin Guan ◽  
Pengfei Tian ◽  
Bing Li ◽  
Xiuping Wu
Keyword(s):  
Cervical Spine ◽  
Cervical Vertebrae ◽  
Three Dimensional ◽  
Cervical Vertebra ◽  
Facial Asymmetry ◽  
Correlation Study ◽  
Surface Model ◽  
Facial Symmetry ◽  
Mandibular Asymmetry ◽  
Cervical Posture

Abstract Background: To explore the degree of skeletal mandibular deviation and the change of mandible position in patients with mandibular deformity and its correlation with cervical posture in patients with jaw deformity using CBCT and to provide the reference for clinical diagnosis and treatment planning. Methods: CBCT images from 30 adult patients with skeletal mandibular deviation and 30 adult individuals with facial symmetry were analyzed and imported in Invivo 5 to reconstruct a 3D hard-tissue surface model. A reference frame was set up and 20 measurements of the mandible and cervical vertebrae were performed to calculated. The difference between the three-dimensional position of the mandible and the posture of cervical spine were analyzed in patients with mandibular asymmetry and normal people. Results: Compared with the normal maxillofacial symmetry groups, there were significant differences in the degree of skeletal mandibular asymmetry and cervical deviation in the mandibular deviation groups(P ＜ 0.05). A strong positive, linear correlation was found in patients with mandibular deviation between the deviation of the mandible and cervical vertebrae posture. Conclusion: There is an inherent correlation between the occurrence of mandibular deviation and the deflection of cervical posture, and they interact on each other. The deformity of mandible affects the three-dimensional posture of the cervical vertebra and can cause different degrees of cervical deflection. The degree of mandible deviation and cervical vertebrae posture in patients with mandibular asymmetry are greater than those in individuals with facial symmetry. Compared with the patients with normal jaw, the deformity among the patients with skeletal mandibular asymmetry has a tendency to tilt forward and bend forward. The abnormal posture of the cervical spine will also affect the three-dimensional position of the mandible, causing the lower 1/3 of the face to appear facial asymmetry with the deflection of the head and neck posture.

An IoT-Based Smart Energy Meter With Real-Time Power Tracking System: A Review

2021 ◽  
Author(s):  
Md. Hasibul Islam ◽  
Touhidul Islam Talukder ◽  
Fatema Tauze Zohora Saima ◽  
Md. Nur Islam Rimon ◽  
Jabed Ali
Keyword(s):  
Real Time ◽  
Tracking System ◽  
System A ◽  
Energy Meter

scholarly journals Multi-camera real-time three-dimensional tracking of multiple flying animals

2010 ◽  
Vol 8 (56) ◽  
pp. 395-409 ◽  
Author(s):  
Andrew D. Straw ◽  
Kristin Branson ◽  
Titus R. Neumann ◽  
Michael H. Dickinson
Keyword(s):  
Real Time ◽  
Animal Movement ◽  
Genetic Manipulation ◽  
Tracking System ◽  
Three Dimensional ◽  
Neural Basis ◽  
Camera System ◽  
Visual Contrast ◽  
Multi Target Tracking ◽  
Experimental Possibility

Automated tracking of animal movement allows analyses that would not otherwise be possible by providing great quantities of data. The additional capability of tracking in real time—with minimal latency—opens up the experimental possibility of manipulating sensory feedback, thus allowing detailed explorations of the neural basis for control of behaviour. Here, we describe a system capable of tracking the three-dimensional position and body orientation of animals such as flies and birds. The system operates with less than 40 ms latency and can track multiple animals simultaneously. To achieve these results, a multi-target tracking algorithm was developed based on the extended Kalman filter and the nearest neighbour standard filter data association algorithm. In one implementation, an 11-camera system is capable of tracking three flies simultaneously at 60 frames per second using a gigabit network of nine standard Intel Pentium 4 and Core 2 Duo computers. This manuscript presents the rationale and details of the algorithms employed and shows three implementations of the system. An experiment was performed using the tracking system to measure the effect of visual contrast on the flight speed of Drosophila melanogaster . At low contrasts, speed is more variable and faster on average than at high contrasts. Thus, the system is already a useful tool to study the neurobiology and behaviour of freely flying animals. If combined with other techniques, such as ‘virtual reality’-type computer graphics or genetic manipulation, the tracking system would offer a powerful new way to investigate the biology of flying animals.

Use of a real-time three-dimensional motion tracking system for measurement of intrafractional motion of the thoracic wall in dogs

2013 ◽  
Vol 74 (1) ◽  
pp. 11-16 ◽  
Author(s):  
Monique N. Mayer ◽  
Joel L. Lanovaz ◽  
Michael J. Smith ◽  
Narinder Sidhu ◽  
Cheryl L. Waldner
Keyword(s):  
Real Time ◽  
Motion Tracking ◽  
Tracking System ◽  
Three Dimensional ◽  
Thoracic Wall ◽  
Intrafractional Motion ◽  
Motion Tracking System
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