statement of the problem in order to replace lost tooth of patients, we use dental implants which are common. therefore, accurate measuring of bone height and width before placing implants is necessary. the aim of this study is evaluating the accuracy of linear and spiral tomography in careful determination of implant site sizes in comparison with gold standard (cbct). material and methods this...

Groove pancreatitis is a special form of chronic pancreatitis in which scarring is found mainly in the groove between the pancreatic head, duodenum, and common bile duct. Preoperative differentiation between groove pancreatitis and pancreatic cancer is difficult. Here we report one case of segmental groove pancreatitis diagnosed by clinical and radiological features. The patient was a 46-year o...

A study was carried out to determine in-tube evaporation and condensation performance of enhanced heat transfer tubes (EHT) using R410A, with the results being compared a plain tube. The test considered in evaluation include: plain, herringbone (HB) spiral (HX) microgrooves, dimple (HB/D), hydrophobic (HB/HY). Experiments evaluate were conducted at saturation 318 K, 279 K for evaporation. Mass ...

The urge to move in response to music, combined with the positive affect associated with the coupling of sensory and motor processes while engaging with music (referred to as sensorimotor coupling) in a seemingly effortless way, is commonly described as the feeling of being in the groove. Here, we systematically explore this compelling phenomenon in a population of young adults. We utilize mult...

Three and five millilitre of india ink were injected bilaterally into the costal groove of the 9th or 10th ribs of 14 cadavers. The spread was observed and the costal groove of the rib injected was dissected, with the one above and one below. Nunn and Slavin's study (1980) of similar injections in two cadavers indicated that an injection of one costal groove blocked not only the intercostal ner...

OBJECTIVE To present a clinical classification of the lip-cheek groove. DESIGN The clinical classification, which is based on years of analysis, will provide optimal management options for achieving the greatest degree of correction and rejuvenation of the lip-cheek groove. RESULTS The use of the clinical classification of the lip-cheek groove will guide the surgeon to the management option...

Structural color printing based on all-aluminum plasmonic V-groove metasurfaces is demonstrated under both bright field and dark field illumination conditions. A broad visible color range is realized with the plasmonic V-groove arrays etched on an aluminum surface by simply varying the groove depth while keeping the groove period as a constant. Polarization dependent structural color printing i...

On the circular curve, lateral acceleration affects comfort. On the spiral, both lateral acceleration and jerk affect comfort.  The determination of maximum curving speed on the basis of lateral acceleration only is not critical because the lateral acceleration is proportional to the square of speed whereas jerk is proportional to cubic power of speed. The maximum speed on a curve is thus signi...

Groove seals are considered as hydrostatic bearings capable of effectively damping rotor vibrations. In order to determine the dynamic characteristics, a model rotor-groove system is considered. The radial forces and moments in groove had been estimated. Expressions joint radial-angular vibrations obtained. Formulas proposed for constructing amplitude phase frequency characteristics. An example...

RecJ, a 5' to 3' exonuclease specific for single-stranded DNA, functions in DNA repair and recombination systems. We determined the crystal structure of RecJ bound to Mn(2+) ion essential for its activity. RecJ has a novel fold in which two domains are interconnected by a long helix, forming a central groove. Mn(2+) is located on the wall of the groove and is coordinated by conserved residues c...