Pitch button blocking (PBB), involving attaching small pitch buttons between the back of a thin workpiece (i.e., optic) and a blocking plate, enables noncompliant convergent polishing in which the workpiece stiffness and block interface strength are maintained. This process has been optimized, and practical design criteria (number, size, and spacing of pitch buttons) have been determined both e...

Embedded in phones, office equipment, speakers, digital photo frames, TV control buttons, remote controls, GPS systems, automotive keyless entry, and medical monitoring equipment, touchscreens are everywhere. As a component, they have reached into every industry, every product type, every size, and every application at every price point. Touchscreens are everywhere. In fact, if a product has an...

This paper addresses the problem of optimal placement and configuration for a set of buttons on a graphical user interface (GUI). We present an optimization algorithm that reduces the average time necessary for pointing device motions. Fitts’ law (Fitts 1954) is used to estimate the transfer time for cursor movements between buttons. Numerous studies in the literature focus on the verification ...

Virtual reality technology and immersive virtual environments often support realistic hand representations via hand-posture-sensing controllers or tracking for natural hand-based interaction. However, one limiting factor remains as the lack of haptic feedback including tactile proprioceptive cues; even simple interactions like touching a object. This paper introduces Holitouch technique to impr...

background: microorganisms on various surfaces in industrial and residential environments can spread infectious diseases. their control is thus a major concern. the aim of this study was to survey the bacterial contamination of elevator buttons in schools of isfahan university of medical sciences, isfahan, iran in the summer of 2011. methods: this study was done as a cross sectional research. a...

The aim of this study was to evaluate the influence of six self-etching primers (SEPs) on the shear/peel bond strength (SPBS) of orthodontic lingual buttons. A total of 150 extracted human premolars were randomly divided into six equal groups. In all groups, the lingual buttons were bonded with BeautyOrtho Bond and the enamel was conditioned with the following-group I (Control): Primers A & B; ...

purpose: to report the histopathological diagnoses of recipient corneal buttons in patients undergoing penetrating keratoplasty. methods: in this observational case series, all recipient corneal specimens sent to the ophthalmic pathology laboratory of the eye bank of iran between 2004 and 2007 underwent histopathologic examination. results: overall, 315 corneal specimens were evaluated. histopa...