Freshly coated aluminum mirrors have excellent reflectivity at far ultraviolet wavelengths. However, reflectivity rapidly degrades when the mirror surfaces are exposed to atmosphere. In order to avoid this problem, freshly coated aluminum surface can be protected by over-coating of a removable volatile protecting coating. This protecting coating can be re-evaporated by controlled heating or by ...

A compact set E ⊂ C is said to be removable for bounded analytic functions if for any open set containing E, every bounded function analytic on \ E has an analytic extension to . Analytic capacity is a notion that, in a sense, measures the size of a set as a non removable singularity. In particular, a compact set is removable if and only if its analytic capacity vanishes. The so-called Painlevé...

Using PAR index / Peer Assessment Rating Index / effectiveness of orthodontic treatment was assessed in the group of patients treated with fixed and removable appliances. The group consisted of 83 patients after the end of the active phase of treatment. 34 patients were treated with removable appliances and 49 patients were treated with fixed appliances. Patients came from three orthodontic wor...

ectodermal dysplasia is a hereditary disorder associated with abnormal development of embryonic ectodermally-derived organs including teeth, nails, hair and sweat glands. hypodontia of the primary and permanent dentition is the most common oral finding. therefore, affected patients need dental prosthetic treatments during their developmental years. this report presents two cases of children aff...

Ectodermal dysplasia (ED) is a congenital syndrome characterised mainly by abnormalities of two or more tissues of ectodermal origin namely skin, nails, hair and teeth. Two brothers of 14 years and 10 years of age respectively reported with chief complaint of multiple missing teeth. Thorough medical and dental examinations were performed and findings were in accordance with the typical features...

In this paper, a visible and removable watermarking scheme in JPEG compression is presented. In the scheme, a secure template is generated to modulate the embedding strength of watermark and host image, separately. The template generates different versions of watermarked images which can be seen visually the same, and the visible watermark can only be removed by the user using the correct key. ...

Removable dentures are commonly used in routine dental practice at older ages. Accidental swallowing of various numbers of teeth has been reported in the literature before. However, total swallowing of removable mandibular prostheses in this size is a very rare emergency. In this study, we reported a case of accidental ingestion of a partially removable mandibular prosthesis and its final passi...