in this paper we establish a characterization of abelian compact hausdorff semigroups with unique idempotent and ideal retraction property. we also introduce a function algebra on a semitopological semigroup whose associated semigroup compactification is universal withrespect to these properties.

background: selective alveolar corticotomy is defined as an intentional injury to cortical bone. this technique is an effective means of accelerating orthodontic tooth movement. the aim of this study is to evaluate the effect of buccal corticotomy in accelerating maxillary canine retraction. materials and methods: the sample in this clinical trial study consisted of 15 adult female patients wit...

background: exposure of the gingival sulcus while controlling hemorrhage is prerequisites for maximizing treatment outcomes of cervical carious lesions and for obtaining quality impressions for the fabrication of indirect restorations with cervical fi nish lines. gingival retraction cords saturated with different chemical agents are widely used for this purpose. the aim of this study was to inv...

PURPOSE The aim of this study was to visualize the subarachnoid portion of the nervus abducens by magnetic resonance imaging and to analyze whether aplasia of the nervus abducens is an etiologic factor in Duane's retraction syndrome. METHODS We performed thin-sectioned magnetic resonance imaging across the brainstem level in 8 cases (11 eyes) that were clinically diagnosed as Duane's retracti...

The introduction of elastomeric impression materials in dentistry resulted in the development of different methods of tissue retraction in order to achieve accurate impression of the finish line of the tooth preparation, which is necessary to fabricate a prosthetic crown. This area needs to be clean, dry and visible. The gingival retraction method [1] is conducted using a retraction cord soaked...

We study the continuation passing style (CPS) transform and its generalization, the computational transform, in which the notion of computation is generalized from continuation passing to an arbitrary one. To establish a relation between direct style and continuation passing style interpretation of sequential call-by-value programs, we prove the Retraction Theorem which says that a lambda term ...

The final report from the Investigation Committee of Seoul National University (SNU) (1) has concluded that the authors of two papers published in Science (2, 3) have engaged in research misconduct and that the papers contain fabricated data. With regard to Hwang et al., 2004 (2), the Investigation Committee reported that the data showing that DNA from human embryonic stem cell line NT-1 is ide...

In the September 23, 2005 issue, Cell published a re-traction of a 2004 paper from Nitz et al. on heritable integration of parasite DNA into host genomes. This was a very unusual situation in which the paper was retracted by the journal rather than by the authors of the paper. The decision to retract the paper came after a year of careful consideration and extensive correspondence with both the...