Topography of the location of mental foramen in dried edentulous human mandible and its clinical implication

The mental foramen is an oval or round opening on external surface of mandible and transmits mental nerve and vessels. Mostly located at apex of second mandibular premolar or between the apices of premolars. The study was commenced on 60 dried edentulous mandibles with the aim to determine location of mental foramen(MF) with reference to surrounding anatomical landmarks. By measuring its distance from midline (symphysis menti), posterior border of ramus of mandible, lower border of mandible. Length of lower border (Base) of mandible was also measured. In present study most common shape of mental foramen was round (70%). The mean distances of MF from midline are 24.36mm on right side and 24.15mm left side. From posterior border of ramus are 64.45mm on right side and 64.15mm on left side. From base of mandible are 12.29mm on right side and 12.48mm on left side. Length of base mandible (midline to angle of mandible) is 83.27mm right side and 83.12mm left side. Ratio of distance from symphysis menti to MF and length of base of mandible are same on both sides that are 0.29. There is statistically significant positive correlation between distance from symphysis menti to MF and length of base of mandible.The MF plays a very important role in treatment planning and its location needs to be considered prior to placement of dental-implants, regional anesthesia, osteotomy-surgeries and during complete denture-fabrication in order to avoid MN injury and related complications.

Gun Source and Muzzle Head Detection

There is a surging need across the world for protection against gun violence. There are three main areas that we have identified as challenging in research that tries to curb gun violence: temporal location of gunshots, gun type prediction and gun source (shooter) detection. Our task is gun source detection and muzzle head detection, where the muzzle head is the round opening of the firing end of the gun. We would like to locate the muzzle head of the gun in the video visually, and identify who has fired the shot. In our formulation, we turn the problem of muzzle head detection into two sub-problems of human object detection and gun smoke detection. Our assumption is that the muzzle head typically lies between the gun smoke caused by the shot and the shooter. We have interesting results both in bounding the shooter as well as detecting the gun smoke. In our experiments, we are successful in detecting the muzzle head by detecting the gun smoke and the shooter.

Morphology and ultrastructure of Sellaphora constrictum sp. nov. (Bacillariophyta), a new diatom from southern China

A new diatom species, Sellaphora constrictum sp. nov., is reported from a karst landform in the Maolan Nature Reserve, Guizhou Province, China. Valves of the new species are broadly linear, slightly constricted in the middle part of the margins and have round apices, an undulate filiform to lateral raphe, a narrow axial area and a narrow conopeum bordering axial area on each side. This species also has undulate ridges along the margin and near the center of the valve, giving the impression of longitudinal ridges on either side of the axial area under light microscopy. Internally, a round opening is present in the apex of the valve, and thickened transverse bars are absent in this region. There are two types of areolae on the valve exterior. Together these features distinguish the new species from all others currently assigned to the genus. We discuss the growing number of new species and genera from freshwater environments in China, and interpretations about the delineation of the genus Sellaphora.

TRUTH LIES IN THE DETAILS: IDENTIFYING AN APIARY IN THE MINIATURE WALL PAINTING FROM AKROTIRI, THERA

One of a number of enigmatic depictions in the Aegean iconography of the second millenniumbceis the structure painted on the south wall of the Miniature Frieze from the West House at Akrotiri, Thera. This structure covers the slope of a hill and consists of two vertical blue bands on its western edge and four horizontal blue bands, all with features indicating masonry construction. Five rows of black triangles alternate with the horizontal bands. Each triangle has a round opening in its base. Unique in Aegean iconography, it has been interpreted as a dovecote, a shipshed, a storage space, a rock-cut structure with triangular niches, a geological formation and even a stretch of land with terraces and a vineyard. In one very brief reference it has been identified with an apiary.In line with contemporary rules of perspective, certain details suggest this structure could represent an apiary on a terraced area, protected on its western edge by a wall to windward. The triangular elements must depict the vertical-type fixed-comb woven beehives, which were in use until quite recently in Greece. A road leading from the apiary and connecting the settlement with the tripartite building at the top of the hill completes the elements needed for organised beekeeping. Similarly, there is a trapezoidal expanse of blue to the east of it which probably depicts a pond, another essential element of beekeeping. Both the extent of the area covered by the installation and the prominence of beekeeping products (indicated by chemical analysis and references on Linear B tablets) raise questions about the management of the apiary and the function of the building at the top of the hill.