For each pair (Qi, Qj) of reference points and each real number r there is a unique hyperplane h ⊥ QiQj such that d(P,Qi)2 − d(P,Qj)2 = r for points P in h. Take n reference points in d-space and for each pair (Qi, Qj) a finite set of real numbers. The corresponding perpendiculars form an arrangement of hyperplanes. We explore the structure of the semilattice of intersections of the hyperplanes...

Forest roads are the most important elements of forestry projects, the management, supervision, care, and only access way to the forest for mechanized harvesting and using other services of forests. The aim of this study was to compare the current annual increment of basal area in different distances from the road in northern forests of Iran. For this purpose, 50 plots were established in 5 dis...

Roll forming process is used for manufacturing sheet metal parts by successive bending and creating the final shape with gradual deformation. In this article, deformation of a pre-punched sheet due to the roll forming process was studied. Two main defects in the roll forming process are ovality of holes and bow defect. The ovality of the hole is influenced by the process parameters including sh...

The sensory portion of the ommatidium of the compound eye of Limulus has been studied with the electron microscope. In axial longitudinal section the rhabdom appears to be made up of small polygons, and in transverse section the rhabdom appears as a banded structure of dark lines. Thus in three dimensions the rhabdom resembles a honeycomb composed of tubular units, the long axes of which lie in...

BACKGROUND AND PURPOSE Patients with LS have an inborn growth hormone resistance, resulting in failure to generate IGF-1. The purpose of this study was to evaluate the size of the eye and orbit in LS. MATERIALS AND METHODS We retrospectively reviewed the MR imaging of the brain in 9 patients with LS for the following parameters: axial diameter of the globe, interzygomatic distance, perpendicu...

Zoning plans are the design work required for correct use of space in terms urbanization. While creating zoning plans, islands created together with various planning methods. Reconstruction also named as having legends such residence, subject + commercial, social areas, religious facility areas called places worship, green areas. The important part is how construction permit given to parcels th...

Zoning plans are the design work required for correct use of space in terms urbanization. While creating zoning plans, islands created together with various planning methods. also named as having legends such residential, subject + commercial, social areas, religious facility areas called places worship, green areas. The important part is how construction permit given to parcels that will coinc...

To evaluate the bearing strength of red pine cross-laminated timber (CLT) with self-tapping screw (STS), which is widely used as a fastener for connection in CLT building, test was conducted. Accoring to STS’s diameters (8, 10, 12 mm), specimens half hole were manufactured. Bearing compared and reviewed consideration configuration STS loading direction grain pine. As result on diameter, yield l...

PURPOSE To describe anatomic features pertinent to patient selection and graft design for transfemoral endovascular aneurysm management (TEAM) of the infrarenal aorta using computed tomographic (CT) angiography. METHODS A prospective noncomparative analysis of 102 spiral CT scans of the abdominal aorta of patients with abdominal aortic aneurysms was performed. From the original CT data set, s...