Cross bite is a condition where one or more teeth may be abnormally malposed buccally or lingually or labially with reference to the opposing tooth or teeth. Cross bite correction is highly recommended as this kind of malocclusion do not diminish with age. Uncorrected cross bite may lead to abnormal wear of lower anteriors and cuspal interference, mandibular shift resulting in mandibular asymme...

BeiDou Global Navigation Satellite System (BDS-3) broadcasts multifrequency signals that offer more choices of frequencies and signal combinations for positioning. This paper analyzes the effect timing group delay (TGD) differential code bias (DCB) BDS-3 on corresponding triple-frequency The observation models are summarized DCB correction derived four different frequency ionospheric-free (IF) ...

With the development of the Internet, the technology of location fingerprint is widely used because of the advantage in indoor positioning performance of complex environment. K neighbor algorithm based on signal strength is a common position fingerprint matching algorithm. This paper firstly introduces the KNN fingerprint localization algorithm, and points out the deficiency of the algorithm. T...

Abstract It is significant to improve the machining accuracy of film cooling holes on aero-engine turbine blades. This paper presents a method correct position In this method, pre-positioning algorithm and precise positioning are proposed. The introduces blade structure information. algorithm, 3D coordinate transformation, ∠B ∠C 5-axis machine tool updating, iteration points creating based norm...

Introduction: Myocardial perfusion imaging is a nuclear medicine imaging method that is used to detect coronary artery diseases. One of the main sources of error in this imaging method is the detection of Compton scattered photons in the photopeak energy window used for data acquisition. This results in the degradation of the image contrast, and therefore decreases the...

The purpose of this study was to investigate the setup and positioning uncertainty of a custom cushion/mask/bite-block (CMB) immobilization system and determine PTV margin for image-guided head and neck stereotactic ablative radiotherapy (HN-SABR). We analyzed 105 treatment sessions among 21 patients treated with HN-SABR for recurrent head and neck cancers using a custom CMB immobilization syst...

BACKGROUND To improve the delivery of radiotherapy in gynecologic malignancies and to minimize the irradiation of unaffected tissues by using daily kilovoltage cone beam computed tomography (kV-CBCT) to reduce setup errors. METHODS Thirteen patients with gynecologic cancers were treated with postoperative volumetric-modulated arc therapy (VMAT). All patients had a planning CT scan and daily C...

The Engineering Test Satellite VIII (ETSVIII), scheduled for launch in 2004, has been developed to expand the advanced fundamental technologies required in future space exploitation, including mobile communications technology and high-precision satellite positioning technology [1]. This will be the first Japanese satellite to be equipped with an onboard atomic clock (the High Accuracy Clock: HA...

Oligodontia is the agenesis of 6 or more teeth, excluding third molars. The etiology of congenital absence of teeth is believed to be rooted in heredity or developmental anomalies. The absence of teeth in patients can cause aesthetic, functional, and psychological problems, particularly if the anterior region is involved. This case report describes the multidisciplinary treatment approach towar...