Coastal buildings are always vulnerable to waves, moisture and corrosion, and their resilience plays an important role in reducing these damages. Climate resilience with a comprehensive and consistent strategy has the potential to reduce the risk in site design and buil More
Coastal buildings are always vulnerable to waves, moisture and corrosion, and their resilience plays an important role in reducing these damages. Climate resilience with a comprehensive and consistent strategy has the potential to reduce the risk in site design and building physics and help improve decision-making in emergency response. This research is targeted at the Applied Research Group. According to the data and the output model, this research is in the category of research research in terms of implementation method. Findings of research in Noor Coastal Area with Ecotech software show that the coefficient of building compatibility index is 0.94, which indicates the resilience of buildings in climatic crises and this coefficient with the type and The direction of the site is different and less than one. The ventilation coefficient for changing the consumed air is 2.24 watts per square meter per hour. The thermal load index for determining energy control in a building is 15.5 and the cooling load is 21 Cͦ. To increase the building's climate resilience, passive design with low-delay thermal mass South and east windows are recommended to increase the heat load in winter and windows north and west are recommended to create natural ventilation and increase the cooling load in summer..
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In this research, a unique structure of silica-supported chlorosulfonyl calix[4]arene (SS-CSC[4]A) was synthesized and applied as a processing aid agent in tire tread formulation. A reference compound based on SBR/BR and other ingredients were considered. Then five othe More
In this research, a unique structure of silica-supported chlorosulfonyl calix[4]arene (SS-CSC[4]A) was synthesized and applied as a processing aid agent in tire tread formulation. A reference compound based on SBR/BR and other ingredients were considered. Then five other compounds were prepared in which resins C5, G90, SP1068, para-tert-Butylphenol, and the synthesized derivative of calix[4]arene were used as processing aid agents. Multiple characterization techniques such as elemental analysis, Fourier-transform infrared spectroscopy (FTIR), thermal gravimetric analysis (TGA), and 29Si CP/MAS spectroscopy were used to characterize SS-CSC[4]A structure. The classical rubber technology tests including rheological test, tensile test, and dynamic-mechanical-thermal analysis (DMTA) were done. DMTA results showed a great decrease in tan δ values of the compound containing SS-CSC[4]A at 90 °C compared to other compounds, which means that constructed tires with this unique structure of SS-CSC[4]A as processing aid agents will consume less fuel for lower heat build-up.
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Over the past decade, intermediate metal nitride coatings, mainly chromium-based, have attracted considerable attention due to their potential applications in many fields such as magnetic, electronic, optical and / or decorative coatings. Chromium nitride (CrN) compound More
Over the past decade, intermediate metal nitride coatings, mainly chromium-based, have attracted considerable attention due to their potential applications in many fields such as magnetic, electronic, optical and / or decorative coatings. Chromium nitride (CrN) compounds have many applications for protection against wear and corrosion due to their good mechanical properties (wear resistance, low friction coefficient, and high hardness) and chemical properties (oxidation and corrosion resistance). In this research, the synthesis of CrN and Cr2N compounds in nitrogen atmosphere has been carried out. For this purpose, during the synthesis, the thermal behavior of the materials in the reaction medium was investigated using thermal gravimetric analysis (TGA) and differential scanning calorimetry (DSC) under nitrogen gas atmosphere from 25 to 1600 °C. The reaction enthalpy was calculated at specific temperature intervals. The results confirmed that in the nitrogen atmosphere the chromium reaction occurs between 100-1600 °C in two separate phases (both endothermic). The resulting products were identified using the XRD technique. Both techniques produced results that confirmed the different combinations in the production process. The morphology of the obtained products was examined by SEM electron microscopy.
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In this work, the effects of the nano-aluminum additive and mixing process on the thermal behavior of Al/CuO systems were verified by thermal analysis and field emission scanning electron microscope (FE-SEM( methods. The DSC analysis results showed that there was no exo More
In this work, the effects of the nano-aluminum additive and mixing process on the thermal behavior of Al/CuO systems were verified by thermal analysis and field emission scanning electron microscope (FE-SEM( methods. The DSC analysis results showed that there was no exothermic reaction for μm-Al/nm-CuO thermite mixture. However, the ignition of [μm-Al95%+nm-Al5%]/nm-CuO, [μm-Al80%+nm-Al20%]/nm-CuO, [μm-Al50%+nm-Al50%]/nm-CuO and nm-Al/nm-CuO took place at 600.9, 604.0, 605.5 and 608.4°C, respectively. Analysis of thermal behavior of these mixtures showed that the insensitivity and energy of the thermites increased with increasing quantity of nm-Al in [μm-Al+nm-Al]/nm-CuO formulation. Moreover, ultrasonic mixing decreased ignition temperature and increased heat of reaction of these ternary mixtures. This improvement in thermal properties was related to break up the agglomerates and better mixing quality by ultrasonic waves. In the next step, the reaction kinetics of physically mixed and ultrasonicated nm-Al/nm-CuO were investigated. The results revealed that sonicated nm-Al/nm-CuO thermite had lower activation energies than physically-mixed nm-Al/nm-CuO mixture. In addition, the ignition of ultrasonicated and physically-mixed nm-Al/nm-CuO mixtures occurred in one and two main steps, respectively.
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