We identify a flaw in the security proof and a flaw in the concrete security analysis of the WOTS-PRF variant of the Winternitz one-time signature scheme, and discuss the implications to its concrete security.

The construction industry is facing increasing pressure to improve productivity and decrease its environmental impact. Additive manufacturing (AM) technologies, especially three-dimensional concrete printing (3DCP) technology, have provided many benefits for construction. However, holistic comparative studies of the competitiveness 3DCP conventional methods, from cost time perspectives, are lac...

This research paper discusses the influence of zeolite-containing filler Beltau deposit and polycarboxylate superplasticizer on formation porosity cement stone. The results experiments to establish effect plasticizing additive pore size distribution are graphically presented. data obtained confirm feasibility using this type in concrete.

This article offers a comprehensive, systematic overview of the existing solutions for integrating reinforcement in digital concrete technologies with particular emphasis on Additive Manufacturing (AM) concrete, also called 3D printing (3DCP). While functionalities various types are briefly addressed, major focus is integration process as such, i.e., its technological aspects. On this basis gen...

The handling of mistakes in the mathematics classroom is an area in which only little research is done so far. In mathematics education there are, in fact, several investigations about students’ mistakes from a diagnostic perspective, but hardly any studies on the question how teachers react in concrete mathematics lessons. In this article theoretical aspects and results of different video stud...

Prestressed concrete (PSC) is one of the most reliable, durable and widely used construction materials, which overcomes the weakness of concrete in tension by the introduction of a prestress force. Smart strands enabling measurement of the prestress force have recently been developed to maintain PSC structures throughout their lifetime. However, the smart strand cannot give a representative ind...

There are many demands of concrete in construction leading to the use industrial waste as mineral additive or supplementary filler improve performance and lower production cost. Silica fume is a distinct waste. The making silica made by case basis based on specific needs especially for prescribed High Performance Concretes. In this study, low/medium grade general investigated [1]. It an attempt...