Abstract The Pilsung cipher is part of the North Korean Red Star operating system, which was leaked to West in 2014. Initial analysis by Kryptos Logic reported a possibility class weak keys due use pseudo-random diffusion. Following this lead, we analyzed and identified small such keys. We developed techniques for searching key that belongs class. After spending thousands CPU hours, found suppo...

We present a row-by-row (RBR) method for solving semidefinite programming (SDP) problem based on solving a sequence of problems obtained by restricting the n-dimensional positive semidefinite constraint on the matrix X. By fixing any (n − 1)-dimensional principal submatrix of X and using its (generalized) Schur complement, the positive semidefinite constraint is reduced to a simple second-order...

1. The formation of the feather pattern has been studied in skin explants obtained from the lumbar region of the spinal pteryla of 6\to 7^-day chick embryos. Explants were cultured in vivo on the chorioallantoic membrane (CAM) or in vitro, either on semi-solid natural media (containing whole chick embryo extract (J£) or chick brain extract (EC)), or in a liquid synthetic medium (199). 2. Feathe...

equipment availability is necessary in the development of agriculture mechanization. crop thinning is one of the most important stages in row crop production which is laborious and costly. the objective of this project is design and construction of a row crop thinning machine. four main system units are plant sensors, ground sensors, control and thinning platforms. in this machine the unwanted ...

Let G be a simple connected graph, and D(G) the distance matrix of G. Suppose that $$D_{\max }(G)$$ $$\lambda _1(G)$$ are maximum row sum spectral radius D(G), respectively. In this paper, we give lower bound for }(G)-\lambda , characterize extremal graphs attaining bound. As corollary, solve conjecture posed by Liu, Shu Xue.

In this paper we propose an approach that rescales the distance matrix of the energy function in the Hoppeld network for solving optimization problems. We rescale the distance matrix by normalizing each row in the matrix and then adjusting the parameter for the distance term. This scheme has the capability of reducing the eeects of clustering in data distributions, which is one of main reasons ...

Shape deformations preserving the intrinsic properties of a surface are called isometries. An isometry deforms a surface without tearing or stretching it, and preserves geodesic distances. We present a technique for matching point set surfaces, which is invariant with respect to isometries. A set of reference points, evenly distributed on the point set surface, is sampled by farthest point samp...

• Forty-seven dowelled cross-laminated timber (CLT) connections were tested. Increased row spacing and end distance significantly increased ductility. Reinforcement by screws or threaded dowels with nuts enhanced performance. 3-ply (135 mm), 5-ply (175 mm ), 7-ply (275 mm) CLT panels employed. Overstrength ductility of determined. Dowel embedment tests performed to determine theoretical overstr...