درخت حوزه‌های تخصصی

Ecological destruction in human-dominated landscapes has significant impacts on environment sustainability internationally. Landscape planning can play a role in mitigating the effects of human-related activities. One element of landscape planning involves the analysis of the biological, spatial and social arrangement of areas in an urban environment and identifying characteristics that are underrepresented in urban natural public spaces. In this study, the quality of public spaces resulting from the regeneration of Tehran’s river-valleys’ natural environment is assessed in relation to landscape ecology principles. We use the components of Bio-spatial-social Logic, Eco-environmentalsocietal Function, Mind-experiential-aesthetic Logic and Eco-environmental-societal Excellence, as the components of a framework, to exامینe the quality of existing urban natural public spaces and to define deficiencies in the current urban landscape system. Based on multivariate ecological, environmental and societal space, the evaluation made by this component model indicates that the principles of landscape ecology have been disregarded in Tehran’s Rivervalleys land development and various ecological problems have been evolved from its river-valleys’ regenerating projects. Our criterion is based on the alteration of landscape’s content composition and spatial configuration variables to eco-environmental-societal excellence features. The analysis provides a systematic, function evaluation of urban natural public spaces, in three hierarchical levels of Environmental Equilibrium, Geographical-anthropological Sustainability and Eco-environmental-societal Excellence features. Some strategies are introduced for Tehran’s rivervalleys’ landscape variables change.

In recent years, the issue of energy consumption modeling techniques in the building sector has been widely considered by researchers and managers. Researches indicate that energy consumption in residential sector is one of the main parts of the total consumption. Moreover, the urban residence is supposed as a significant consumer of energy in every country and therefore a focus for energy consumption efforts. For over increasing building energy consumption there can be some causes including : climate change, increase in household electricity load, fast-growing household electrical appliances, huge energy consumption of the buildings, and the lack of strict government supervision. Recently the issue of assigning different prices to different time-periods of energy consumption has been taken into consideration for energy prices of consumers’ bills. Therefore, in this paper a model for multi-prices and multi-periods single-type energy consumption in urban residential sector is presented; also an efficient heuristic method is provided for solving the mentioned model.

In land use and transportation planning, mixed land uses usually are those various and consistent land uses which have been within a single structure or close to each other. Mixed land uses in different societies are used for different purposes. In some of these societies, mixed land uses are appropriate strategies in mixing the housing types in a small scale in order to enhance the identity of old cities. In other societies they are used as a mean to revive the worn out areas and speed up economic developments. Even some societies use them to create the suburbs' centers. In this regard, the aim of this study is to evaluate the mixed land uses in Tehran's Bryanak neighborhood. For this purpose, the most important criteria and sub-criteria are compiled to determine the situation of the mixing land uses in this neighborhood, and by using Analytical Hierarchy Process (AHP) and questionnaire an appropriate and measurable framework is provided to measure and present strategies for the preservation and promotion of mixed land uses. The results indicate that the final score of this neighborhood was calculated as 3.08 that is very close to the "average" and indicates that the situation of mixed land uses in Bryanak neighborhood is average and some actions should be taken to improve conditions for the development of mixed land uses in this neighborhood.