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In coastal groundwater aquifers, seawater intrusion is seen as a significant issue. Increasing the groundwater pumping rate enhances seawater intrusion into groundwater in the coastal aquifers. In Egypt, the Nile Delta aquifer (NDA) is extremely vulnerable to Mediterranean Sea seawater intrusion. The study's major goal was to create a three-dimensional groundwater model that included all branches of the irrigation system and their groundwater recharges into the NDA. The NDA model was built by using the SEAWAT program. The model validation was achieved by comparing its results with the observation data and results from previous models. Three scenarios were proposed considering: 1) sea level rise, 2) changes in the rate of groundwater abstraction, and 3) a combination of the conditions of the two previous scenarios' conditions. A rise in Mediterranean Sea levels by 25, 50, 75 and 100 cm caused additional saltwater intrusion to distances of 5.11 km, 7.10, 7.62 and 8.2 km, respectively. Moreover, in comparison to the base situation, a decrease in the lower boundary's groundwater head by 25, 50, 75 and 100 cm caused the saltwater to advance further inland to distances of 5.30, 5.47, 5.52 and 5.75 km, respectively. The third scenario proved to be the worst case, in which saltwater intrusion increased to a distance of 7.22, 7.73, 8.20 and 10.20 km, respectively. Compared with previous model studies, the results showed that saltwater intrusion length decreases by 4.0 km after including all branches of the irrigation network.

In the third millennium, the term knowledge economy means to employ knowledge to achieve economic benefits. Knowledge is the main driver of economic growth, which depends on the availability of information and communication technology, the use of innovation and slavery, and the increase in reliability of knowledge management as assets become The task in the contemporary economy is technical knowledge, creativity, and learning, in addition to artificial taste and computer programs across a wide range of products that outweigh the importance of capital, materials, or employment, the growth of productivity in both the Western and Eastern world sought to be a direct product to implement the concept of Knowledge economy. In order to take advantage of the knowledge economy, a proposal has been made to develop learning in line with contemporary requirements for the investment of knowledge and the student's education of how to develop and protect the thoughts as part of the knowledge economy system. The research also aims to focus on how to contribute to learning in building an economy of knowledge by focusing on the development of the innovative and creative abilities of students in all stages of study before and after university education and even higher studies and research, and to establish evidence of its effectiveness. To achieve this, the study plan was based on the use of the research and the extrapolation to solve that problem by submitting a proposal to the contribution of learning in building the concept of the knowledge economy and its characteristics and tools to focus in the mind and experience of the student how effective the development of creativity and creativity and the importance of its future professions. The plan is divided: The first stage: inference in which the researcher is based on this information down to the elements unknown in the form. The second stage: Extrapolation was done by extrapolating the results of the introspection and establishing evidence that the learning curriculum needs to be supported by aspects of the development of innovative and creative abilities and related sciences. The most important results are the proposal to develop the learning process in order to achieve the understanding of the concept of developing innovative capacities with the concept of the contemporary knowledge economy.

The design is linked always to both social and technological forces, which in turn influence the form, nature and implementation of the design and by the fourth industrial revolution a prelude to the philosophy of contemporary industrial design based on contemporary technologies such as 3D printers and the revolution of ultra-fast communications in its various forms such as the Internet of Things and others, contributed to the transition from quantitative production to individual production (more personalized manufacturing). This requires a different way of designing and updating the product where advances in design theory and computer technology provide greater opportunities for new products and systems for rapid success without added cost, and provides the opportunity to pay attention to the development of the model as one of the satisfactory solutions for product development and ensuring its competitive ness and speed, and the use of new computer-supported design tools to deal with a full range of planning and design requirements. Fundamental changes must be made to understand how to take full advantage of new technologies as much of the success of the global economy in the third millennium will depend on the ability to find a way to share developments in design technology and market knowledge.In order to contribute to the consolidation of this concept, a study should be presented on the impact of high-speed market requirements on the process of product modernization and utilization of the use of manufacturing technology in line with contemporary requirements taking into account the contribution of design education in building the knowledge of the learner's knowledge of the requirements of the development and transformation of production from quantum to the production of fast and flexible batches covering the demand for it in limited quantities by issuing a new model of the product, in view of reducing the cost in order to meet the urgent need of markets for renewal in record time. The study plan on the use of research and the in-kind approach provided a proposal for how industrial design contributes in the light of the data of the fourth industrial revolution through how to guide and use contemporary possibilities to design the fastest and cheapest model of products and services in keeping with the current nature of the market.

This study seeks to shed some light on the Arabic writings which deal with Ibn Khaldun's discourse. It aims to analyze these writings to see how they study Ibn Khaldun's writings, especially his well-known Muqaddimah, or "Prolegomena". The study classifies Arabic writings into three sections: the first section repeats and reproduces literally what Ibn Khaldun wrote; the second focuses on many issues of his writings; and finally, the third section gives more attention to only one issue of Ibn Khaldun's writings. [ABSTRACT FROM AUTHOR]