Urban Structure and Energy—A Review

BACKREACTION OF LINEAR PERTURBATIONS AND DARK ENERGYa

The coincidence problem. Perhaps the most surprising observation in modern cosmology is that the expansion of the universe has apparently started to accelerate in the recent past, at a redshift of probably less than one. This phenomenon has usually been interpreted in the context of a homogeneous and isotropic model of the universe. The acceleration can then be accommodated only by modifying gr...

Ancient Iranian Urban Structure and its Situation in Contemporary City

Analysis of Dome Structure in Iranian - Islamic architecture and urban structure

The most important characteristic of dome and factors influencing it in the Islamic Iranian architecture that is different from other courses is construction and construction methods of them. Over time, different factors are involved in the process of formation of the domes. It is one of the factors influencing the structure of Iranian-Islamic domes. By examining the structure of Iranian-Islami...

the underlying structure of language proficiency and the proficiency level

هدف از انجام این تخقیق بررسی رابطه احتمالی بین سطح مهارت زبان خارجی (foreign language proficiency) و ساختار مهارت زبان خارجی بود. تعداد 314 زبان آموز مونث و مذکر که عمدتا دانشجویان رشته های زبان انگلیسی در سطوح کارشناسی و کارشناسی ارشد بودند در این تحقیق شرکت کردند. از لحاظ سطح مهارت زبان خارجی شرکت کنندگان بسیار با هم متفاوت بودند، (75 نفر سطح پیشرفته، 113 نفر سطح متوسط، 126 سطح مقدماتی). کلا ...

Spatial Segregation and Urban Structure

In this paper, we study social interactions between two populations of individuals living in a city. Agents consume land and benefit from intraand inter-group social interactions. We show that in equilibrium segregation arises: populations get separated in distinct spatial neighborhoods. Twoand three-district urban structures are characterized. For high population ratios or strong intergroup in...