Coordinate Transformation In Unmanned Systems Using Clifford Algebra

Self Cite

A novel method on the basis of multi chaos theory is suggested in the presented study. Also, the study used two different dimensions to generate S-Box to get a strong cipher that is difficult to break. The suggested image cryptosystem includes an identical (decryption and encryption) process, which involves a single keystream generator, shifting process (based on 3D Lorenz map) related diffusion operations, and generate S-Box (based on 2D Henon map) that related confusion operation. The comparative analysis and the simulate test show that the suggested image cryptosystem has a few properties, like high-sensitivity, fast encryption/decryption, large keyspace, excellent statistical properties related to the ciphertext, and so on. The suggested cryptosystem is considered as an alternative for practical secure communications.

Section: S-box Generatormentioning

confidence: 99%

Multi Chaotic System to Generate Novel S-Box for Image Encryption

Nasry

Abdallah²,

Farhan³

et al. 2022

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“…Brebbia and Rashed [15] presented general methods for processing domain integrals in boundary elements, such as by transforming to the boundary, like cell and Monte Carlo methods, as well as Green's Identity and Dual Reciprocity technique. Nasry [16] discover a new technique for transforming variables and coordinates from the original to the new. When using this technique, it is noted that it is simpler and faster to compute and more obvious than other techniques.…”

Section: Introductionmentioning

confidence: 99%

Systematic derivation of the fundamental solutions for couple stress theory

El-metwaly,

Kamal,

Rashed

et al. 2023

Classical elasticity theory failed to produce accurate results given in agreement with the experimental results. As this theory fails at stress concentration near the gaps or holes, or materials with significant microstructure contributions as soil, composite material, and polymer material generally in aerospace materials. In order to improve accuracy, the consistent couple stress theory is used. In the consistent couple stress theory, the microrotation and macro rotation are equal, where the macro rotation is half the curl of displacement, and the couple stress tensor is skew-symmetric. In this paper, the fundamental solutions for couple stress elasticity are derived in a systematic way via the Hörmander technique. The used technique is characterized by its ease and also develops the Galerkin tensor used in many applications, for example, the transformation of domain integral, computing the body force in the domain without discretization. All necessary kernels for displacements and tractions are derived and given in terms of a generalized Galerkin tensor for further use.

“…Several numerical studies were carried to analyze shallow foundations on reinforced soil [13][14][15]. Mathematical modeling is of a great importance to describe the real problem in terms of equations [16][17][18]. Classical method in design does not take into consideration the real soil pressure.…”

Section: Introductionmentioning

confidence: 99%

A new mathematical model to evaluate the effect of load inclination on aircraft shelter’s foundations

Elhanash,

Elsherif,

Zaky

et al. 2023

Aircraft shelter is a structure or a reinforced hanger that has many uses in military aspects. It is used to protect military aircraft from different dangers such as enemy chemical attacks. Also, it provides housing, permitting aircraft maintenance and it can be storage for different weapons. therefore, optimum design of aircraft shelter is of a great importance. It may take several shapes to be suitable for its usage. It can be made from concrete, steel or composite materials. The foundations of an airplane shelter must be designed as best as possible. Design objectives are greatly impacted by the contact pressure between the earth and the foundation surface. Classical method in design assumes maximum uniform linear distribution of pressure under contact surface of footing. So, considering real contact pressure has a great interest for many authors. In this article, a new analytical method is proposed to study the effect of moments and load inclination on the design of rectangular isolated footing. The model proposed takes into consideration the real soil pressure. A parametric study was conducted and data obtained from classical model were larger than those from proposed model. Seven Rectangular isolated footings were designed using traditional method and proposed method. The proposed method is more economic since it provides less concrete dimensions. Results obtained from the new model were compared with FEM and achieved reasonable agreement.