Digital projectors have been steadily becoming smaller and cheaper, and are now used to augment various surfaces with digital information. However, in situations other than the ideal dark room with a perfect white screen we must contend with ambient light and non-uniformity in surface colour, which will reduce the contrast of the output and introduce visible irregularities. Here we present a me...

Surface reflection can be used as one quality assurance procedure to inspect the defects, cracking, and other irregularities occurring on a polished surface. In this paper, we present a novel approach to the detection of defects based on analysis of surface reflection images. In this approach, the surface image is analyzed using texture analysis based on Gabor-filtering. Gabor-filters can be us...

introduction: indirect composites are developed to overcome the shortcomings of direct composites but, the adhesion of resin cements to indirect composites is still difficult. the purpose of this study was to evaluate the surface morphology of indirect resin composite treated by different powers of er:yaglaser using scanning electron microscopy (sem). methods: indirect resin composite blocks (g...

BACKGROUND The purpose of this study was to determine whether surface irregularities measured from ultrasound images of carotid artery plaques and quantified using a novel method, correlate with the presence of ipsilateral hemispheric cerebrovascular symptoms. METHODS A plaque surface irregularity index (SII) was measured in 47 carotid artery plaques (32 subjects, stenosis range 10% -95%, 49%...

One of the primary goals in endodontics is efficient cleaning and shaping root canal while maintaining its original configuration. Numerous studies highlight advantage using nickel-titanium instruments most important their high flexibility ability to penetrate curved canals. The aim this study was analyze ultrastructure surface endodontic files before after use. Eighty-four were included study....

Non-systematic errors in wheeled mobile robots are significantly influenced by irregularities on the surface. The presence of non-smoothness on a surface causes the robot to deviate from its desired trajectory, and move towards an undesirable destination. This paper uses a technique, previously proposed by the first author, to alleviate the positional error originating from non-systematic resou...

BACKGROUND Filler materials are gaining popularity in nonsurgical rhinoplasty the major advantages are the ability to camouflage the surface deformities, and also the soft and malleable consistency; while the major drawback of the safe fillers such as hyaluronic acid is short durability. In this study, we evaluated the injectable cartilage shaving as an autologous filler material for correction...

Many researchers have long observed some cases in which certain ranking irregularities can occur when the original analytic hierarchy process (AHP), or some of its variants, are used. This paper presents two new categories of ranking irregularities which defy common intuition. These ranking irregularities occur when one decomposes a decision problem into a set of smaller problems each defined o...