We prove that the pleated hyperbolic paraboloid, a familiar origami model known since 1927, in fact cannot be folded with the standard crease pattern in the standard mathematical model of zero-thickness paper. In contrast, we show that the model can be folded with additional creases, suggesting that real paper “folds” into this model via small such creases. We conjecture that the circular versi...

objectives major differences exist in the anatomy and biomechanics of the growing spine that causes failure patterns different from those in adults. spinal injury in the pediatric patient is a main concern because timely diagnosis and appropriate treatment can prevent further neurologic damage and deformity and potentiate recovery. we conducted a retrospective clinical study of 137 cases (93 bo...

AIMS To assess the clinical and fluorescein angiographic features of choroidal folds seen in association with papilloedema. METHODS In a retrospective study, the clinical data from a database on patients with choroidal folds (1963-97), including fundus photography and fluorescein angiography, from 32 patients (64 eyes) with choroidal folds in association with papilloedema were reviewed. The c...

We completely classify toric weakened Fano 3-folds, that is, smooth toric weak Fano 3-folds which are not Fano but are deformed to smooth Fano 3-folds. There exist exactly 15 toric weakened Fano 3-folds up to isomorphisms.

Many seemingly unrelated protein families share common folds. Theoretical models based on structure designability have suggested that a few folds should be very common while many others have low probability. In agreement with the predictions of these models, we show that the distribution of observed protein families over different folds can be modeled with a highly-stretched exponential. Our re...

background & objectives: tumor diathesis (td) is defined as granular proteinaceous precipitates on slide surface of cytologic smears. it is found in the background of smears of invasive carcinoma but not in all cases. the aim of present study was to determine the prevalence of td in cervicovaginal smears from patients with uterine cervix carcinoma. methods: cytological smears and histologi...

Laryngoceles are abnormal dilatations of the laryngeal saccule, which rises between the ventricular folds, the base of the epiglottis and the inner surface of the thyroid cartilage. Clinical symptoms are rare, and the find of asymptomatic laryngoceles in pathology studies are frequent. Sometimes it is presented as cervical swelling causing airway obstruction in need of emergency intervention. I...