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...

PURPOSE Effective dose (ED) is a widely used metric for comparing ionizing radiation burden between different imaging modalities, scanners, and scan protocols. In computed tomography (CT), ED can be estimated by performing scans on an anthropomorphic phantom in which metal-oxide-semiconductor field-effect transistor (MOSFET) solid-state dosimeters have been placed to enable organ dose measureme...

Let A and B be n × m matrices. The matrix B is said to be g-row majorized (respectively g-column majorized) by A, if every row (respectively column) of B, is g-majorized by the corresponding row (respectively column) of A. In this paper all kinds of g-majorization are studied on Mn,m, and the possible structure of their linear preservers will be found. Also all linear operators T : Mn,m ---> Mn...

Developing countries and the global network of donors, programs and nongovernmental organizations (NGOs) have agreed that health systems need to become stronger if gains in health are to be achieved and sustained. Existing data collection and use is fragmented, disease specific, inconsistent and often of poor quality. Major factors contributing to the current situation are that the burden of da...

malaria is the second most frequent clinically suspected disease entity after acute respiratory tract infection in developing countries. active malarial transmission occurs throughout the year, while aggressive out bursts of disease are seen mainly during and after the 'monsoon' season. this study aimed to determine the morbidity and mortality associated with malaria during flood at isra univer...