background: in megavoltage radiotherapy rooms, ordinary concrete is usually used due to its low construction costs, although higher density concrete are sometimes used, as well. the use of high-density concrete decreases the required thickness of the concrete barrier hence, its disadvantage is its high cost. in a nuclear reactor, neutron radiation is the most difficult to shield. a method for p...

Surfaces of carbon fibre roving were modified by means of a low temperature plasma treatment to improve their bonding with mineral fines; the latter serving as an inorganic fibre coating for the improved mechanical performance of carbon reinforcement in concrete matrices. Variation of the plasma conditions, such as gas composition and treatment time, was accomplished to establish polar groups o...

The paper gives an overview on the meta-data specification for administrating and enforcing enterprisewide security for heterogeneous and distributed information systems. The meta-data serves as a basis to maintain enterprise-wide security information centrally, to integrate isolated security specifications, to keep the consistency between different security policies, and to perform access cont...

This paper addresses the security of public-key cryptosystems in a \multi-user" setting, namely in the presence of attacks involving the encryption of related messages under di erent public keys, as exempli ed by H astad's classical attacks on RSA. We prove that security in the single-user setting implies security in the multi-user setting as long as the former is interpreted in the strong sens...

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.

This paper reviews the application of carbonation technology to the environmental industry as a way of reducing carbon dioxide (CO(2)), a green house gas, including the presentation of related projects of our research group. An alternative technology to very slow natural carbonation is the co-called 'accelerated carbonation', which completes its fast reaction within few hours by using pure CO(2...

Industry 4.0 factories become more and more complex with increased maintenance costs. Reducing costs by cyber-physical (CP) controllers should ensure the commercialization of the CPS for smart factory project results. We implement multi-adaptive CP controllers in the following domains: industrial robot arms, car manufacturing, steel industry, and assembly lines in general. The main objective is...

This paper develops a structural evolutionary microeconomic model where the forces of chance and selection are at work and matches this model to data. As a concrete example we explore the process of industry concentration by modeling bottom-up starting with profit maximizing firms and introducing stochastic elements at various levels of the market. An estimation procedure is developed to connec...

Ready Mix Concrete (RMC) industry in India is continuously growing. This industry is exposed to risks from internal as well as external sources. It is important to address these risks, so that industry shall gain credibility and confidence of the customers, and shall have expected profit margins. Proposed paper presents a risk quantification approach for risks in RMC plants in India, using Expe...

Big companies of the Information Technology (IT) industry have been increasingly distributing on a world scale their units of software development to countries in Asia, Eastern Europe and Latin America through offshore development centers as a strategy to increase competitiveness and reduce costs. In this context, emerging countries, like Brazil and its several measures focused on the developme...