Wide distribution of chlorinated paraffins in the environment has already been demonstrated in several studies; however, information about their levels in the Central Europe is still very limited. First study focused on the SCCP contamination of the Czech aquatic environment have been performed recently, and its results motivated the authors to analyze sediments from a wide set of the Czech riv...

The GridTrust Security Framework (GSF) offers security and trust management for the next generation Grids (NGG). It follows a vertical approach for Grid security from requirements level right down to application and middleware levels. New access control models for collaborative computing, such as the usage control model (UCON), are implemented for securing the Grid systems. The GSF is composed ...

Data and information in the development of digital technology have an important role. Every activity or that uses is related to data information, so security confidentiality are very important. To maintain confidentiality, protection with cryptographic techniques needed. Cryptographic encryption, which where process scrambling carried out hiding a key system, while decryption changing condition...

Permafrost thaw leads to thermokarst lake formation and talik growth tens of meters deep, enabling microbial decomposition formerly frozen organic matter (OM). We analyzed two 17-m-long sediment cores taken in Central Yakutia, Russia. One core was from an Alas a Holocene basin that underwent multiple generations, the second young Yedoma upland (formed ~70 years ago) whose sediments have thawed ...

1 Abstract Since the industrial revolution, standardization has become a hybrid of technical design and political processes with major impact on markets, social welfare and economic activity. Standards are increasingly developed outside government regulatory venues in consortia and other forms of voluntary consensus bodies involving collaboration among private sector competitors, suppliers, cus...

In this article we present some weaknesses in the RC4 cipher and their cryptographic applications. Especially we improve the attack described in [2] in such a way, that it will work, if the weak keys described in that paper are avoided. A further attack will work even if the first 256 Byte of the output remain unused. Finally we show that variants of the RC4 algorithm like NGG and RC4A are also...

The agricultural valorization of organic waste, including digestate from anaerobic digestion, can be a good tool to remedy the problem soil depletion by intensive crops. This study was conducted evaluate effect application on chemical characteristics soil, N, P, and K content, pH, electrical conductivity, as well agronomic performance forage corn (Zea mays L.). Digestate applied incorporated in...