55-year-old male patient presented with a slowly and progressively growing mass involving the tip and dorsum of the nose of several years duration (Figure 1). It was painless, was not associated with nasal obstruction, and did not respond to antibiotic treatment. The patient had no other similar masses in the body. There was no history of trauma or previous surgical manipulation in this area. P...

STUDY DESIGN A prospective study of anterior transarticular screw (ATS) fixation patients. OBJECTIVE To develop a method to determine screw tip position through plain radiography after percutaneous ATS fixation to prevent occipitocervical joint (OCJ) violation. SUMMARY OF BACKGROUND DATA No studies using plain radiography to prevent OCJ violation during percutaneous ATS fixation have been p...

A general discussion of 'organizing regions' and the specification of biological patterns is followed by introducing the idea that the tip of the slime mould cell mass is such an 'organizer'. This view is supported by a discussion of the developmental ubiquity of the tip and its effects. A staging system is described which assigns numbers to sequential morphological changes during development. ...

Background: The technique of vertical dome division or tip defining, involves incising the lateral crura and vestibular skin at or lateral to the dome or tip defining point. The incision di-vides the lower lateral cartilage into a lateral segment and a medial segment, which are advanced anteriorly and sutured together to increase tip projection. The present study aimed at assessing a new vertic...

The fluctuations of the position of monatomic steps on Ag (111) are investigated by Scanning Tunneling Microscopy (STM). We analyze the influence of tip-sample interact~on by varying the gap ~mpedance over more than two orders of magnitude. For tunneling tips providing a weak tip-sample interact ion, we show that the step position au~ocorrelation function remains essentially unaltered. In this ...

In this paper, we prove the existence and uniqueness of weak solution a flexible beam that is clamped at one end free other; mass also attached to beam. Also, construct finite element method, based on piecewise cubic Hermitian shape functions. Next, derive error estimates for semi-discrete Galerkin approximations. The results are derived from \cite{BS}. Finally, implement numerical schemes deve...