Objective. The purpose of this study was to evaluate the efficiency of operating microscope compared with unaided visual examination, conventional and digital intraoral radiography for proximal caries detection. Materials
and Methods. The study was based on 48 extracted human posterior permanent teeth. The teeth were examined with unaided visual examination, operating microscope, conventional bitewing and digital intraoral radiographs. Then, true caries depth was determined by histological examination. The extent of the carious lesions was assessed by three examiners independently. One way variance of analysis (ANOVA) and Scheffe test were performed for comparison of observers, and the diagnostic accuracies of all systems were assessed from the area under the ROC curve (A
z). Results. Statistically significant difference was found between observers (P < .01). There was a statistically significant difference between operating microscope-film radiography, operating microscope-RVG, unaided visual examination-film radiography, and unaided visual examination-RVG according to pairwise comparison (P < .05). Conclusion. The efficiency of operating microscope was found statistically equal with unaided visual examination and lower than radiographic systems for proximal caries detection.
Suç bölgelerinin oluşturulması suçlara karşı önlemlerin alınmasında kritik öneme sahiptir. Bu bölgelerin oluşumunda kullanılan geleneksel kümeleme yöntemleri yalnızca tek boyutta kümeleme yaparken, belirli kümeler yerine genel sonuçlar sağlar. Bu çalışmada, ayrıntılı kümelerin oluşturulması için ikili kümeleme (biclustering) yöntemlerinden Bimax algoritmasının uygulanabileceği önerilmektedir. Bu yöntemle, hem suçun işlendiği bölgeler hem de suç türleri aynı anda kümelenerek suç bölgeleri oluşturulmuştur. Bu suç bölgeleri ile ilgili sosyo-ekonomik değişkenler arasındaki farklılıklar analiz edilmiş ve suç bölgelerine özgü özellikler sunulmuştur.
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