کیفیت محیط های مسکونی ماهیتی چند بعدی دارد. هدف این مقاله شناخت عوامل تأثیرگذار بر ارتقاء کیفیت محیط و ایجاد الگویی جهت سنجش کیفیت در مجتمع های مسکونی برای شکل گیری مطلوب محیط های مسکونی است. برای رسیدن به این هدف، پرسش اساسی این است که چه عواملی بر ارتقاء کیفیت محیط مسکونی تأثیرگذار است؛ و چگونه این عوامل سنجش کیفیت فضا را در گونه هایی از مسکن میسر می سازد؟ برای پاسخ به پرسش ها عوامل 1)مشخصات فردی ساکنان، 2)قابلیت فضاهای بینابینی و 3)کیفیت طراحی معماری در نظر گرفته شد. به منظور ارزیابی عوامل از آزمون های t، همبستگی و تحلیل عاملی استفاده گردید. نتایج نشان می دهد که مدت سکونت، سطح تحصیلات، سن و نوع تملیک (در بخش مشخصات فردی)، قابلیت های فضاهای بینابینی و کیفیت طراحی معماری در کیفیت بخشی به محیط موثر هستند. نتایج حاصل از سنجش نشان داد که بیشترین میزان نارضایتی ساکنان از محیط مسکونی و مهم‌ترین شاخص جهت ارتفاء کیفیت بنا مربوط به دسترسی پذیری در سطح مجتمع مسکونی می باشد. Manuscript profile

The friction stir process (FSP) is a solid state process, which has been used to insert reinforcing particles into the structure of a material to create a composite with improved properties. Magnesium is a light structural metal that is increasingly used in the aerospace and automobile industries. In this research, SiC nanoparticles were added to AZ31 alloy using FSP in two overlaps of 100% and 50% passes. In 100% pass overlapping, nanoparticles were added in 4, 8 and 16 volume percentages and in 50% pass overlapping only nanoparticles in 4 volume percent were added. The FSP process performed as 4 consecutive passes in both overlaps along with rapid cooling. Microstructure, hardness and tensile strength of created composites were examined. The results suggested that adding reinforcing materials causes reduction in the size of the grains, uniformity of structure and increase in the hardness of material. SiC nanoparticles distributed uniformly through the AZ31 alloy. By increasing volume fraction of reinforcing materials, yield stress of the material increased but ultimate stress and formability properties reduced. In 50% overlapping state, the yield stress in directions, either parallel or perpendicular to the pin direction, increased rather than 100% overlapping state, but the ultimate stress and elongation properties reduced. This reduction was greater in the perpendicular direction relative to the pin direction. Manuscript profile

Today, with the increase in population, the use of fossil fuels has also increased, On the other hand, this increase in population has led to the production of more urban waste, which is itself the source of environmental pollution. One of the ways to reduce waste pollution is to use it to generate useful energy such as electricity, which reduces pollution and provides part of the required electrical load. In this study, the study area of Hamadan city is considered to have an average urban waste production of about 420 tons/month. Homer software has been used to analyze the amount of electricity produced, and economic and environmental analysis has also been done. One of the outstanding results of the research is the production of 229,735 kW/year of electrical energy. Electricity generation with biomass resources will reduce Co2 and Co emissions by 77.2 and 7.96 kg/year, respectively. That cost of energy(COE) for this system is 0.177$/kWh. Manuscript profile