In the figure above, we see a lattice of black and white atoms. These could be B and N atoms respectively for a BN-sheet. Using one of the equivalent unit cells (hashed area) and combinations of the unit vectors, ~a1 and ~a2, we can generate the entire lattice. A general translational vector in a periodic lattice can be written as the sum of integer multiples of unit vectors, ~ T (~n) = ~ T (n1...

This paper presents a compact and efficient shape signature that can be applied to shape retrieval from handdrawn sketches. The two proposed invariant features that constitute our affine invariant signature are: (a) angle between spoke vectors, and (b) cumulated normalized area between consecutive spoke vectors. The signature can be computed efficiently from an input shape and supports fast sim...

We cluster surface target feature vectors by position in a certain area of the battlespace and make inventories of the resulting clusters by type and count. The feature vectors come from the target tracks. Our new centralized-mean clustering method is robust. Next, we apply case-based reasoning to infer the enemy unit types and their posture for situation awareness. We then employ a weighted re...

background: ticks are the main vectors for transmission of different pathogens to human and animals. this survey was performed to find out distribution of ticks, which infested the domestic ruminants in yazd province, central iran during year 2008-2009. methods: a total number of 30 villages from both mountainous (20%) and plateau (80%) regions of the province were selected randomly. ticks were...

anopheles dthali patton which is one of the 7 malaria vectors in iran was not taken in to consideration until november 1965 when definite sporozaites were found for the first time in its salivary glands in bandar abbas, south of iran. afterwards, efforts have been made to get complete ecological and epidemiological information on this species. the areas of study were two districts of mamasani, ...

Background & Aims: Anopheles stephensi is one of the most important malaria vectors in Hormozgan province, southern Iran. This species with high density has an effective role in malaria transmission, especially in plain and coastal areas. At present, the country malaria vector control program in areas with local transmission is using deltamethrin 5% and Bacillus thuringiensis as insecticide ...

An area based counterpart of the binary structural opening spectra is developed. It is shown that these area opening and closing spectra can be computed using an adaptation of Tarjan’s union-find algorithm. These spectra provide rotation, translation, and scale invariant pattern vectors for texture analysis.