We present three-dimensional, nonrelativistic, hydrodynamic simulations of bow shocks in pulsar wind nebulae. The simulations are performed for a range of initial and boundary conditions to quantify the degree of asymmetry produced by latitudinal variations in the momentum flux of the pulsar wind, radiative cooling in the postshock flow, and density gradients in the interstellar medium (ISM). W...

OBJECTIVES This study sought to assess distal and lateral forces and moments of asymmetric headgears by variable outer bow lengths. MATERIALS AND METHODS Four 3D finite element method (FEM) models of a cervical headgear attached to the maxillary first molars were designed in SolidWorks 2010 software and transferred to ANSYS Workbench ver. 11 software. Models contained the first molars, their ...

The bag of visual words (BOW) model is an efficient image representation technique for image categorisation and annotation tasks. Building good visual vocabularies, from automatically extracted image feature vectors, produces discriminative visual words which can improve the accuracy of image categorisation tasks. Most approaches that use the BOW model in categorising images ignore useful infor...

We present the results of a study focused on the morphology and dynamical evolution of wind bow shocks produced by massive runaway stars in the diffuse interstellar medium. A revision of current analytical models describing the shape and physical parameters of a wind bow shock is proposed, motivated by the recognition that the shocked stellar wind does not need to incorporate into the bow shock...

Background: The purpose of this research was to determine the rate of deformity in boys and girls youngsters in Lorestan. Materials and methods: The statistical community of the research included all the youngsters in Lorestan Province. The subjects in this study were 400 boys and 450 girls (11-15 years old) that collected randomly. Data collection was done by questionnaires and physical exami...

This paper describes the development of a virtual violin bow haptic human-computer interface, which senses bow position with encoders, to drive bowed-string physical model synthesis, while engaging servomotors, to simulate the haptic feedback of a violin bow on a string. Construction of the hardware and programming of the software are discussed, as well as the motivation for building the instru...

We present hydrodynamical simulations, using a 2-D two fluid model, of bow shocks in a representative regime for pulsar wind driven bow-shock nebulae. We also investigate the behaviour of a passive toroidal magnetic field wounded around the pulsar velocity direction. Moreover we estimate the opacity of the bow-shock to penetration of ISM neutral hydrogen. Finally we compare these numerical resu...

The main contribution of this paper is a new method for classifying document images by combining textual and visual features repectively extracted with the Bag of Words (BoW) and the Bag of Visual Words (BoVW) techniques. While previous attempts have been showing disappointing results by combining visual and textual features with the Borda-count technique, we’re proposing here a combination thr...

A derecho-producing bow echo event over the Central US on 8 May 2009 is analyzed based on radar observations and a successful real-data WRF simulation at 0.8 km grid spacing. Emphasis is placed on documenting the existence, evolution and characteristics of low-level mesovortices (MVs) that form along the leading edge of the bowing system. The genesis of near-surface high winds within the system...