A spherical antenna array (SAA) is the configuration of choice in obtaining an with isotropic characteristics. An SAA has capacity to receive electromagnetic wave (EM) equal intensity irrespective direction-of-arrival (DoA) and polarization. Therefore, DoA estimation waves impinging on unknown mutual coupling needs be considered. In domain, traditional multiple signal classification algorithm (...

Existing polar transfer alignment (TA) algorithms are designed based on linear Kalman filters (KF) to estimate misalignment angles. In the case of a large misalignment angle, these algorithms cannot be applied in order to achieve accurate TA. In this paper, a TA algorithm based on an unscented Kalman filter (UKF) is proposed to solve the problem of the large misalignment angle in the polar regi...

Purpose: The aim of this study was to find correlations between lateral cephalometric measurements and photographic measurements of facial attractiveness in a group of Egyptian adolescents. Materials and methods: Sixty adolescent laypersons judges (30 males – 30 females) participated in the evaluation of the pre-treatment photographs of 60 adolescent subjects (30 females – 30 males) for facial ...

BACKGROUND Anterior cervical discectomy and fusion (ACDF) is widely used in the treatment of cervical degenerative disease; however, the variation of cervical sagittal alignment changes after ACDF has been rarely explored. The purpose of this study is to determine the relationship between changes of cervical sagittal alignment after ACDF and spino-pelvic sagittal alignment under Roussouly class...

AIM Conservative treatment is a frequently used treatment modality for traumatic thoracolumbar fractures. However, not many studies evaluating radiological and clinical results of conservative treatment are found. The aim of this study was to determine the risk factors, and compression and kyphosis rates after 1 year in patients with AO type A thoracic, thoracolumbar, and lumbar fractures treat...

Let M(n) denote the group of orientation-preserving isometries of H. Classically, one uses the disk model for H to define the dynamical type of an isometry. In this model an isometry is elliptic if it has a fixed point on the disk. An isometry is parabolic, resp. hyperbolic, if it is not elliptic and has one, resp. two fixed points on the conformal boundary of the hyperbolic space. If in additi...

  Deviation angles of secondary electrons and muons in simulated extensive air showers were studied. The angles have wide distribution, whose width depends on energy cuts imposed on shower particles. In this work, variation of deviation angles with the energy of secondary particles, shower energy, primary direction, and core distance was investigated. The results put limitations on application ...

In this paper the daily, monthly, seasonally, and yearly optimum slope angles of solar collectors are determined for areas in Iran and new models are developed to calculate the monthly, seasonally, and yearly optimum slope angles for latitudes of to north. To achieve this purpose, the slope and surface azimuth angles of solar collectors for receiving maximum solar radiation were determined ...

Coxeter’s classification of the highly symmetric geodesic domes (and, by duality, the highly symmetric fullerenes) is extended to a classification scheme for all geodesic domes and fullerenes. Each geodesic dome is characterized by its signature: a plane graph on twelve vertices with labeled angles and edges. In the case of the Coxeter geodesic domes, the plane graph is the icosahedron, all ang...

This paper suggests a method of classifying Korean pop (K-pop) dances based on human skeletal motion data obtained from a Kinect sensor in a motion-capture studio environment. In order to accomplish this, we construct a K-pop dance database with a total of 800 dance-movement data points including 200 dance types produced by four professional dancers, from skeletal joint data obtained by a Kinec...