Egypt have a wealth of heritage and archaeological buildings from prehistoric until the era of the Muhammad Ali family (1805 - 1952), where European influences prevailed in this period, mixed with traditional Islamic styles. Our building in this paper is a tomb dating back to the family of Ismail Sidqi Pasha (1875 - 1950). This building was built before 1900, as the first tombstone dates to 1900, therefore it was built in the period between 1880 and 1900. The roof of the building is considered one of the most building elements vulnerable to damage due to rainwater that accumulates on the roof for a long time in winter, beside insulation material damage, causing Lots of damage to the roof. Consequently, it affected the ceiling decorations.......

Keywords: - Concrete (gypsum - lime), unreinforced concrete, gravel concrete, renders, salts, compression test, bending test, roof simulation model (mock-up).

[1]. Suheir Helmy, (2003.) .The Family of Muhammad Ali. Egyptian General Book Authority, p 55
[2]. Egyptian Gazette, Issue 74, March 29, 2023. p 6
[3]. Muhammad Thabet,( 2020) .Civil and educational Buildings in Muharram Bek district in Alexandria city , era of the Muhammad Ali family (an archaeological and architectural study). Ph.D , Faculty of Arts, Helwan University, Egypt , p. 39
[4]. Rainer . l, Rivera . A, (2004) .The conservation of decorated surfaces on Earthen Architecture. The getty conservation institute los Angeles , p 16
[5]. Ridout .V ( 2008) .Moisture Monitoring in Earthen Structures Earthen Architecture Conservation . The Getty Conservation Institute, Los Angeles, p28

We propose a new method to synthesize 1 Hz wind speed and wind power time series data from the industry standard 10-minute wind turbine performance data. The method is based on a parameterized power spectral density (PSD) function decomposed into trend and random components. We illustrate the intra-timestep data synthesis 10 utilizing 1 Hz data from two distributed wind turbines..

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It is inevitable that the human race would eventually seek to explore other planets and set foot on them. Chemical Engines are our primary method of traveling across the solar system, especially crewed travel or travel involving very high payloads. However, these engines simply do not possess the efficiency (Specific Impulse) required for fast and frequent Interplanetary travel. Therefore, we suggest the utilization of a nuclear engine, A nuclear gas core open cycle engine. These engines would have the thrust of a chemical engine combined with the efficiency of nuclear fission resulting in an engine with almost 4-8x the efficiency of a conventional chemical engine. We also hope to explore a possible application of this engine.

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[1] Nasa(For General Rocket Principles)
[2] Cho, S. J., Lee, J., Lee, Y. S., & Kim, D. P. (2006). Characterization Of Iridium Catalyst For Decomposition Of Hydrazine Hydrate For Hydrogen Generation. Catalysis Letters, 109(3-4), 181–186. Doi:10.1007/S10562-006-0081-3
Https://Chem.Libretexts.Org/Bookshelves/Physical_And_Theoretical_Chemistry_Textbook_Maps/Supplemental_Modules_(Physical_And_Theoretical_Chemistry)/Nuclear_Chemistry/Fission_And_Fusion/Fission_And_Fusion
[4] Http://Large.Stanford.Edu/Courses/2011/Ph241/Hamerly1/
[5] Https://Www.Fxsolver.Com/Browse/Formulas/Exhaust+Gas+Velocity