Moreover, the comparative study of prices in Egypt and even in parts of Egypt (a nome, a toparchy, a village) is rendered very difficult by many peculiar circumstances. This is true, for example, of the prices of such a basic commodity as grain. In the statistical lists compiled by modern scholars the price of grain is shown per artaba, as if the artaba were a constant measure. In fact, as has ...

The transition from the Soviet-era centralized command economy to a market economy exacerbated the food security challenges in Kyrgyzstan. During the early 1990s, there was a sharp decline in food absorption in the economy along with a drop in incomes; accordingly, the use of grains as feed for livestock production was severely curtailed. There has been a partial recovery since 1995 driven by t...

African yam bean (Sphenostylis stenocarpa) is an underexploited legume with the potential of becoming an alternative food staple to alleviate the problem of food security. An assessment was carried out on the growth and yield of AYB affected by Telfairia mosaic virus (TeMV) Infection. Telfairia mosaic virus caused severe mosaic, leaf distortion and malformation on AYB. Analyses of results revea...

Grid infrastructures provide an environment for high performance computing by combining heterogeneous, widely distributed computational resources into a single cohesive computing infrastructure. One of the key goals of grid computing infrastructure is to provide an environment where users can share resources across heterogeneous domains. In such an infrastructure security is the major concern. ...

The concept of food security has been on the international agenda as far back as 1948, when the Universal Declaration of Human Rights affirmed that “Everyone has the right to a standard of living adequate for the health and well-being of himself and his family, including food.....” Article 11 of the International Covenant on Economic, Social and Cultural Rights went further, in 1966, when it af...

Attempts to increase food crop yields by intensifying agricultural systems using high inputs of nonrenewable resources and chemicals frequently lead to de-gradation of natural resources, whereas most technological innovations are not accessible for smallholders that represent the majority of farmers world wide. Alternatively, cocultures consisting of assemblages of plant and animal species can ...

Symmetric key cryptographic algorithms provide confidentiality, integrity, and authentication in modern communication systems. Our confidence in these algorithms is largely based on the fact that intense cryptanalysis has been carried out over several years without revealing any weakness. This thesis makes three independent contributions to the cryptanalysis of symmetric key primitives and hash...

Grain legumes remain important to meet the projected targets relating to food and nutritional security worldwide. The complementation of cereal-based food with grain legumes is a vegetarian diet with high-quality protein. However, the performance of these crops is severely influenced by a number of biotic and abiotic stresses, of which pests and pathogens remain the crucial affecting plants at ...

Differential Fault Attack (DFA) is presently a very well known technique to evaluate security of a stream cipher. This considers that the stream cipher can be weakened by injection of the fault. In this paper we study DFA on three ciphers, namely Grain v1, Lizard and ACORN v3. We show that Grain v1 (an eStream cipher) can be attacked with injection of only 5 faults instead of 10 that has been r...