Search for: environmental-impact
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    Environmental impact analysis of high-rise buildings for resilient urban development

    , Article Scientia Iranica ; Volume 27, Issue 4 , 2020 , Pages 1843-1857 Vafai, H ; Parivar, P ; Sehat Kashani, S ; Farshforoush Imani, A ; Vakili, F ; Ahmadi, G ; Sharif University of Technology
    Sharif University of Technology  2020
    In recent years, the construction of high-rise buildings as an urban development strategy has been accepted in many megacities. High-rise buildings have positive as well as negative impacts on urban environments. Therefore, the environmental impact assessment of high-rise buildings for establishing strategies to ensure sustainable and resilient urban development is essential. In this study, the environmental impact of high-rise buildings with a resilient development mindset was assessed. Resilience mindset provides an approach for including the uncertainties and interdependence of systems and processes for planning new sustainable developments and assessment methods. The corresponding... 

    Comparative study of environmental impact assessment methods along with a new dynamic system-based method

    , Article African Journal of Biotechnology ; Volume 8, Issue 14 , 2009 , Pages 3267-3275 ; 16845315 (ISSN) Nouri, J ; Jassbi, J ; Jafarzadeh, N ; Abbaspour, M ; Varshosaz, K ; Sharif University of Technology
    Environmental Impacts Assessment has been developed as a critically substantial approach to determine, predict and interpret the ecological impact on the environment, public hygiene and healthy ecosystems. This study aims to introduce and systematically investigate the environmental issues during important decision-making stages. Meanwhile, impacts of development on the environmental components will be also analyzed. This research studies various methods of predicting the environmental changes and determining the impacts through both qualitative and quantitative methods. Qualitative approaches rely fully upon the expert's decisions, while quantitative ones are entirely based on mathematical... 

    A review of global gas flaring and venting and impact on the environment: Case study of Iran

    , Article International Journal of Greenhouse Gas Control ; Volume 49 , June , 2016 , Pages 488–509 ; 17505836 (ISSN) Soltanieh, M ; Zohrabian, A ; Gholipour, M. J ; Kalnay, E ; Sharif University of Technology
    Elsevier Ltd  2016
    After a brief review of the global gas flaring and venting in oil industries including the emission of air pollutants and greenhouse gases and the amount of energy resources wasted, the focus is on Iran as a major oil producing and the world's third largest gas flaring country. Gas flaring is also practiced in natural gas industries, petroleum refining and petrochemical plants, although the level of emission is very low compared with emissions from oil production. The historical emission of these gases globally and Iran specifically, geographic location of emission sources, composition of gases, environmental impacts of gas flaring and the current and future projects to mitigate emissions... 

    Measuring sustainable transportation for the world countries: The application of concordance analysis

    , Article Proceedings of the Eighth International Conference on Applications of Advanced Technologies in Transportaion Engineering, Beijing, 26 May 2004 through 28 May 2004 ; 2004 , Pages 334-339 Rassafi, A. A ; Vaziri, M ; Sharif University of Technology
    ASCE - American Society of Civil Engineers  2004
    In this paper, sustainability with respect to transportation sector of the selected countries has been evaluated. Seventy nine countries were initially selected for detailed analysis for the period of 1980-1995. The key dimensions of sustainable development i.e. social, environmental, and economic characteristics are used. Firstly, a set of sustainable transportation indicators has been introduced. Then composite indices of three non-transport groups with respect to four transport modes are calculated. The composite indices are aggregated by the concordance analysis technique to achieve comprehensive transport sustainability indices of countries, and according to these values, the countries... 

    A joint model for mode choice and escort decisions of school trips

    , Article Transportmetrica A: Transport Science ; Volume 11, Issue 3 , Nov , 2015 , Pages 270-289 ; 23249935 (ISSN) Ermagun, A ; Hossein Rashidi, T ; Samimi, A ; Sharif University of Technology
    Taylor and Francis Ltd  2015
    A considerable shift has occurred in mode choice behaviour and escort pattern of students for their school trips around the world during the last few decades. This shift towards using more non-active modes has undesirable consequences, including physical inactivity among students, traffic jams during peak hours, and adverse environmental impacts. Hence, understanding the behaviour of decision-makers with regard to the mode choice and escorting pattern selection is crucial for controlling the trend of the shift and promoting active modes. This study is the first effort to mathematically model the mode choice and accompaniment pattern selection by parents for the school trip of students, in a... 

    The externality from communal metering of residential water: the case of Tehran

    , Article Water Resources and Economics ; Volume 23 , July , 2018 , Pages 53-58 ; 22124284 (ISSN) Vesal, M ; Rahmati, M. H ; Taheri Hosseinabadi, N ; Sharif University of Technology
    Elsevier B.V  2018
    Many countries use a single water meter for multiple units within a building. This creates a cost externality where the cost of water consumed is spread over all units. Using administrative data from Tehran Water and Wastewater Co. for 2013 and 2014, we find an increase in the number of units on a communal meter on average increases per unit use by 0.4%. Estimation at different levels of units reveals that almost all communal meters have higher per unit water use. The results suggest that removing this externality could save 2.7% water consumption in our sample. © 2018 Elsevier B.V  

    Environmental impact assessment modeling in an urban man-made lake using fuzzy logic

    , Article Journal of Food, Agriculture and Environment ; Volume 7, Issue 3-4 , 2009 , Pages 811-814 ; 14590255 (ISSN) Jassbi, J ; Nouri, J ; Abbaspour, M ; Varshosaz, K ; Jafarzadeh, N ; Sharif University of Technology
    Environmental impact assessment essentially depends on diverse closely connected components and variables. For this purpose, identification of the whole components is fundamentally required. This study aims to investigate environmental impact assessment of an urban man-made lake in the western part of Tehran, based on recognition of affecting components and their reciprocal effects. Since the components are not constant during the time, thus throughout the environmental impact assessment modeling study, dynamism of the relation between the components should be considered. Regarding insufficiency and uncertainty of information, an analytical method, based on expert's opinion can be applied.... 

    Investigation of development features of membrane cell chlor-alkali technology

    , Article CHISA 2006 - 17th International Congress of Chemical and Process Engineering, Prague, 27 August 2006 through 31 August 2006 ; 2006 ; 8086059456 (ISBN); 9788086059457 (ISBN) Haddadi, A. M ; Babazadeh, F ; Kazemeini, M ; Sharif University of Technology
    As the membrane technology developed at the last 30 years, the relevant processes have been significantly developed. One of which is the chlor alkali technology. The development of membrane technology and its effect on Chlor-Alkali process is capable of evaluation in to two different fields, environmental and energy consumption. Some of environmental problems of mercury and diaphragm processes because of their technological development have been eliminated the energy consumption of these processes is significantly decreased especially in membrane and diaphragm processes. Recently investigation in the field of membrane cell is more focused on cell construction, depolarized cathodes, and fluid... 

    Minimization Of of Environmental Impacts Of of Educational Buildings Using Life Cycle Analysis . A a Case Study: Building Of of Energy Engineering Faculty

    , M.Sc. Thesis Sharif University of Technology Soleimani Javid, Atiye (Author) ; Avami, Akram (Supervisor)
    Today, building sectors account for 34% of total energy consumption in Iran. Increasing demand of the comfort level along with population growth necessitates much more attention about energy requirements in the country. Such phenomenon has already raised concerns about the heavy environmental impacts. The present research studies minimization of global warming potential effect for an educational building by developing life cycle optimization model. The Department of Engineering of Sharif University of Technology is selected as the case study and optimal solutions has been achieved for this building. Results state that implementing cogeneration and renewable energies can reduce20 -25% of the... 

    Optimal Design and Operation of Energy Supply Systems of Energy Efficient Greenhouses Based on Dual Stage Multi-objective Optimization

    , Ph.D. Dissertation Sharif University of Technology Golzar, Farzin (Author) ; Roshandel, Ramin (Supervisor) ; Hellweg, Stefanie (Co-Supervisor)
    The purpose of this research is developing an analytical and decision-making tool that examines the interactions between greenhouse energy demand and yield production. Greenhouseholders can use the analytical tool to design and operate existintg and newly built greenhouses in an optimal way. Becides, the decision making tool helps planners and policymakers to improve the performance of greenhouses and extend greenhouse cultivation with respect to their economic or environmental objectives.In order to develop this decision making tool, existing models for greenhouses have been investigated and various algorithms have been combined to develop an integrated energy demand-plant growth model. The... 

    Effect of Reforming Energy Subsidies on Economy of Iranian Industry Sector and Carbon Dioxide Emissions at 2025 Time Horizon

    , M.Sc. Thesis Sharif University of Technology Raei, Hassan (Author) ; Maleki, Abbas (Supervisor)
    The purpose of this study is to analyze the economic, welfare, and environmental effects of the policy of reforming energy subsidies in the industrial sector. The policy of reforming energy subsidies has been examined in the form of 6 scenarios based on the elimination of the current system of payment and redistribution of income among households and producers in certain proportions using a computable general equilibrium model. In the static model, economic variables include variables of production, price and net exports at the industry level and GDP variables, consumer price index, household consumption, government spending, investment, total imports and exports, prices and employment of... 

    Energy and environmental issues in transport sector

    , Article International Journal of Environmental Research ; Volume 5, Issue 1 , December , 2011 , Pages 213-224 ; 17356865 (ISSN) Alipour, S ; Karbassi, A. R ; Abbaspour, M ; Saffarzadeh, M ; Moharamnejad, N ; Sharif University of Technology
    Nowadays, transportation sector consumes about 27 percent of the whole energy in Iran. Therefore, after domestic and business sectors which consume about 40 percent of the whole energy, transportation is placed in the second rank. However, the financial value of transportation is of the highest importance. Moreover, having 55percent of gasoline product consumption transportation has been also ranked as the largest consumer of gasoline products. Gasoline consumption in transport showed an increase until 1979. During 1980-1981, it decreased slightly and from 1982 have had a permanent upward trend. Oil products consumption in transport sector in 1950 has been less than average 15 million... 

    Generation of motional entangled coherent state in an optomechanical system in the single photon strong coupling regime

    , Article Journal of Modern Optics ; Volume 62, Issue 19 , Jul , 2015 , Pages 1685-1691 ; 09500340 (ISSN) Mahmoudi, Z ; Shakeri, S ; Hamidi, O ; Zandi, M. H ; Bahrampour, A ; Sharif University of Technology
    Taylor and Francis Ltd  2015
    The single-photon strong coupling in the deep-resolved sideband of the optomechanical system induces photon blockade (PB) effect. For the PB cavity, an initial mechanical coherent state evolves into superposition of phonon cat states entangled with the cavity Fock states. Measurement of the cavity photon number states produces phonon even and odd cat states. The information leakage effect of two photon states on the fidelity of cat states is calculated, it is shown that for low average phonon number this effect is negligible and decreases by increasing the two photon cavity state. The Lindblad equation is solved numerically to obtain the environmental effects on the fidelity of cat states  

    Managing reengineering operations

    , Article 2006 IEEE International Conference on Management of Innovation and Technology, ICMIT 2006, Singapore, 21 June 2006 through 23 June 2006 ; Volume 1 , 2006 , Pages 268-269 ; 1424401488 (ISBN); 9781424401482 (ISBN) Afshar, A ; Sepehri, M ; Sharif University of Technology
    Fifteen years after introduction of Business Process Reengineering (BPR) and a series of successful and not-so-successful BPR implementation, a revised methodology is needed to incorporate cases of major and sudden organizational or environmental changes with BPR. The new methodology can also be particularly applicable to project oriented businesses. September 11, Tsunami, and other major world events show that nothing is constant but change. A reengineered process may only stay as the environment factors stay the same. Therefore, the processes can no longer be the central focus of reengineering, but the output needs. Technology has enabled us to refocus and apply reengineering constantly to... 

    Model for R&D planning in energy sector

    , Article IEMC 2005: 2005 IEEE International Engineering Management Conference, St. John's, Newfoundland, 11 September 2005 through 13 September 2005 ; Volume II , 2005 , Pages 663-667 ; 078039139X (ISBN); 9780780391390 (ISBN) Shafiei, E ; Saboohi, Y ; Ghofrani, M. B ; Sharif University of Technology
    Optimal allocation of resources for R&D on new energy technologies is an important issue in the process of development of energy system models. In this study, a model of R&D planning in energy sector has been developed and it is then linked to the energy system model. Energy system model is used as a tool for the technology assessment and prioritization of new energy technologies is evaluated with the help of this model. Based on the economic and environmental impact of new technologies, the optimal allocation of resources for R&D of new technology is estimated with the help of the R&D planning model. The conceptual formulation of the model and its integration with the energy technology... 

    Optimal model of solid waste technology assessment

    , Article 2005 ASME International Mechanical Engineering Congress and Exposition, IMECE 2005, Orlando, FL, 5 November 2005 through 11 November 2005 ; Volume 2005 , 2005 , Pages 69-76 ; 0791842185 (ISBN); 9780791842188 (ISBN) Eslami Nejad, P ; Saboohi, Y ; Sharif University of Technology
    Review of waste management models indicate that optimization models based on the chain of waste flow are developed and applied in waste management systems. These models do represent the flow of material through few stages and they lack an integrated approach that may include the flow of material from the point of waste generation in different sectors till the end point at the land fill. It is also argued that the existing models do rarely consider the interrelated issues of economics, environment and social aspects. This conclusion has been followed by the development of an integrated multi stage and multi period dynamic model of waste flow based on quasi dynamic optimization techniques. The... 

    Surface modification of exchange-coupled Co/NiO x magnetic bilayer by bias sputtering

    , Article Applied Surface Science ; Volume 252, Issue 2 , 2005 , Pages 466-473 ; 01694332 (ISSN) Sangpour, P ; Akhavan, O ; Moshfegh, A. Z ; Jafari, G. R ; Kavei, G ; Sharif University of Technology
    Elsevier  2005
    We have investigated the effect of bias voltage on sheet resistance, surface roughness and surface coverage of Co/NiO x magnetic bilayer. In addition, interface topography and corrosion resistance of the Ta/Co/Cu/Co/NiO x /Si(1 0 0) system have been studied for Co layers deposited at an optimum bias voltage. Atomic force microscopy (AFM) and four point probe sheet resistance (Rs) measurement have been used to determine surface and electrical properties of the sputtered Co layer at different bias voltages ranging from 0 to -80 V. The Co/NiO x bilayer exhibits a minimum surface roughness and low sheet resistance value with a maximum surface coverage at Vb=-60 V resulted in a slight increase of... 

    Urban sustainable transportation indicators for global comparison

    , Article Ecological Indicators ; Volume 15, Issue 1 , 2012 , Pages 115-121 ; 1470160X (ISSN) Haghshenas, H ; Vaziri, M ; Sharif University of Technology
    Transportation has significant and long lasting economical, social and environmental impacts, and so is an important dimension of urban sustainability. Some attempts have been made to develop sustainable transport indicators, STI. A few studies actually apply STI to compare sustainability among various world cities. In this paper various world cities ranked in terms of urban sustainable transport composite index. The study database is created from UITP databank: "Millennium cities database for sustainable mobility" or MCDST. Firstly sustainable transportation indicators were selected by reviewing past researches. Some indicators are edited or redefined. Consequently 9 STI were developed, 3... 

    Extended energy return on investment of multiproduct energy systems

    , Article Energy ; Volume 192 , 2020 Salehi, M ; Khajehpour, H ; Saboohi, Y ; Sharif University of Technology
    Elsevier Ltd  2020
    Energy Return on Investment (EROI) is an indicator of how efficient is an energy supply system. In the present study, the conventional approach of EROI assessment is extended to include the equivalent energy investment needed for offsetting the life cycle environmental impacts. Moreover, the issue of allocation of the invested energy among different by-products is addressed. The EROI of multiple products has been specified using different benchmarks of price, energy content, exergy content, and exergy costs. The application of the concept is demonstrated through a case study of an Iranian oil production unit. The overall conventional and environmentally-extended EROI values of the produced... 

    BIM-based approach to conduct Life Cycle Cost Analysis of resilient buildings at the conceptual stage

    , Article Automation in Construction ; Volume 123 , 2021 ; 09265805 (ISSN) Rad, M.A.H ; Jalaei, F ; Golpour, A ; Hosseini Varzande, S. S ; Guest, G ; Sharif University of Technology
    Elsevier B.V  2021
    All costs within the life cycle of a building are known as its life cycle cost (LCC). In the design process of a building, the use of a lower initial cost index to select an option among others with similar performance may not lead to an economically optimal alternative during the life cycle. Hence, today, building designers and investors require a tool to estimate life cycle cost at the conceptual design stage to select an economically efficient option. Resilient solutions generally lead to a higher level of complexity and upfront costs and carry additional embodied environmental impact as well. This study aims to support the design of resilient buildings using a sound LCC methodology in...