There are mainly two categories for a 3D reconstruction from 2D drawings: B-Rep and CSG that both these methods have serious weaknesses despite being useful. B-Rep method which has been older and have wider function range is problematic because of high volume of calculations and vagueness in answers and CSG method has problem in terms of very limited range of volumes and drawings that it can an...

Last year, a new notion of rep-cube was proposed. A rep-cube is a polyomino that is a net of a cube, and it can be divided into some polyominoes such that each of them can be folded to a cube. This notion was inspired by the notions of polyomino and rep-tile, which were introduced by Solomon W. Golomb. It was proved that there are infinitely many distinct rep-cubes. In this paper, we investigat...

A typical B-rep describes a solid in its full detail. Operations that locally analyze the B-rep usually process the entire B-rep due to the lack of spatial ordering of its topological entities. For very complex objects, this global processing is time consuming and yet unnecessary. One approach in avoiding the global processing is to use several B-reps of different levels of detail. However, thi...

objective(s):to date, the most important genes responsible for tetracycline resistance among acinetobacter baumannii isolates have been identified as tet a and tet b. this study was carried out to determine the rate of resistance to tetracycline and related antibiotics, and mechanisms of resistance.  materials and methods: during the years 2010 and 2011, a total of 100 a. baumannii isolates wer...

Numeration Systems Definition An abstract numeration system is a triple S = (L,Σ, <) where L is a regular language over a totally ordered alphabet (Σ, <). Enumerating the words of L with respect to the genealogical ordering induced by < gives a one-to-one correspondence repS : N → L valS = rep −1 S : L → N. Example L = a∗, Σ = {a} n 0 1 2 3 4 · · · rep (n) ε a aa aaa aaaa · · · Abstract Numerat...

In this paper I compare two well studied approaches to topological semantics— the domain-theoretic approach, exemplified by the category of countably based equilogical spaces, Equ, and Type Two Effectivity, exemplified by the category of Baire space representations, Rep(B). These two categories are both locally cartesian closed extensions of countably based T0-spaces. A natural question to ask ...

In this paper I compare two well studied approaches to topological semantics| the domain-theoretic approach, exempli ed by the category of countably based equilogical spaces, Equ, and Type Two E ectivity, exempli ed by the category of Baire space representations, Rep(B ). These two categories are both locally cartesian closed extensions of countably based T0-spaces. A natural question to ask is...

While almost all collision detection algorithms have been linked to a particular object representation scheme, few attempts have been made using hybrid methods to exploit the advantages of multiple representations of objects. In this paper we present a collision detection algorithm based on a dual b-rep/CSG representation of concave polyhedra initially represented in b-rep. Our method naturally...

DNA helicases are essential to many cellular processes including recombination, replication and transcription, and some helicases function in multiple processes. The helicases encoded by the Xeroderma pigmentosum (XP) B and D genes function in both nucleotide excision repair and transcription initiation. Mutations that affect the repair function of these proteins result in XP while mutations af...

A total of 119 Bacillus thuringiensis strains (83 type strains and 26 native isolates), as well as five B. cereus group species, were analyzed by repetitive extragenic palindromic sequence-based PCR analysis (Rep-PCR) fingerprinting. Primers Bc-REP-1 and Bc-REP-2 were specifically designed according to an extragenic 26-bp repeated sequence found in the six B. cereus group genomes reported. A to...