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    H2S sensing properties of added copper oxide in WO3

    , Article Key Engineering Materials ; Volume 543 , March , 2013 , Pages 145-149 Nowrouzi, R. (Rasoul) ; Razi Astaraei, F. (Fatemeh) ; Kashani, Sh. (shima) ; Iraji Zad, A. (Azam) ; Sharif University of Technology
    2013
    Abstract
    We study Hydrogen sulfide gas detection properties of pure and 1% copper oxide added WO3 thin films. The spin coated deposits on alumina substrates were annealed at 500 C for 1 hour in order to improve the crystallinity of the films. The sensitivity of pure tungsten oxide is poor even at temperatures of about 100 C but the doped samples exhibit good response to H2S gas. Our data show sensitivity of about 1500 in 10 ppm diluted gas in air at 100 C. The films are sensitive to the gas even at 250 ppb (sensitivity about 2) H2S concentration at 100 C but with rather long recovery time. Crystal structure, morphology and chemical composition of samples were studied by X-Ray diffraction (XRD),... 

    Gauge Symmetry in Renormalization Group Flow

    , Ph.D. Dissertation Sharif University of Technology Asnafi, Shima Sadat (Author) ; Ardalan, Farhad (Supervisor)
    Abstract
    Exact Renormalization Equations (ERGE) are powerful non-perturbative tools to study the dynamics of Quantum Field theories, with respect to the change of energy. Putting cut-off on momentums of the system, is the specific regularization that is used to obtain ERGEs. This regularization breaks the gauge symmetry in the case of gauge theories. So the symmetry will be lost through the energy flow as well.Finding a gauge symmetry for a regularized system is the aim of this research. Also we have investigated the related ERGEs and the behavior of symmetry through the flow  

    Stability Analysis of Fractional Order Systems Described in Lur'e Structure

    , M.Sc. Thesis Sharif University of Technology Mousavi, Shima Sadat (Author) ; Tavazoei, Mohammad Saleh (Supervisor)
    Abstract
    Most of the real-world systems can be modeled as closed loop systems which are made up of a LTI subsystem in the forward path and a memoryless nonlinear subsystem in the feedback path. Such systems are called “Lur’e systems”, the name of the first who introduced these systems. Because of the generality and the wide applicability of this type of systems, studying the stability of them has been notable and interesting to many scientists for a long time. Meanwhile, in recent decades, many scientists in physics and engineering sciences have been interested in applications of the fractional order systems and as a result focused on studying the features of the fractional order systems. An... 

    , M.Sc. Thesis Sharif University of Technology Kashani, Massoud (Author) ; Moghaddam, Hassan (Supervisor)
    Abstract
    The paper presents the results nonlinear analysis of steel base plates subjected to different combinations of axial and bending forces. The bending forces range from small moments representing small eccentricities to large moments from seismic actions. The results of analyses proved to be in good agreement with experiments. The parameters investigated in this study are as follows: distribution of strain and stresses in the concrete foundation and the steel plate, the strains and stresses in the tensile anchorage bolts, the location of neutral curve under the base plate, the centre of compressional reaction forces in concrete, the flextural rigidity of the base plate connection, and the axial... 

    Assessment of Seismic Retrofit Policies for Buildings

    , M.Sc. Thesis Sharif University of Technology Movahedi, Ali (Author) ; Kashani, Hamed (Supervisor)
    Abstract
    Occurrence of natural disasters such as earthquake could seriously damage most buildings especially those with insufficient resistance located in urban worn-out textures. In order to reduce unpleasant consequences of an earthquake, appropriate policies need to be considered to persuade the beneficiaries to follow retrofitting standards in the process of planning, designing, and construction of buildings. These policies shall be implemented through institutions in arbitrary or obligatory forms, by encouragement or penalty mechanisms. In order to consider these policies, first of all we need to identify the beneficiaries and their particulars. By studying and considering subjects discussed in... 

    Probabilistic Framework to Quantify the Resilience of Urban Gas Distribution Networks

    , M.Sc. Thesis Sharif University of Technology Baratian, Amin (Author) ; Kashani, Hamed (Supervisor)
    Abstract
    This study proposes a probabilistic framework to quantify the seismic resilience of urban natural gas distribution networks. Infrastructure resilience is defined as the ability to maintain performance after a hazard or, in case of a loss of performance, return to the minimum desired level in the optimal time. The framework presented in this research is comprised of multiple interconnected probabilistic models. These models work in harmony to characterize the impact of the earthquake on various infrastructures such as the buildings and urban gas distribution network components, as well as the probable consequences of the earthquake. The post-earthquake recovery of the gas distribution network... 

    Machine Learning Models for Estimating House Prices

    , M.Sc. Thesis Sharif University of Technology Sharifi, Mohammad (Author) ; Kashani, Hamed (Supervisor)
    Abstract
    Optimal use of available resources for construction projects depends on proper decision-making on how to spend resources. Optimization of resource consumption should be done taking into account project revenue. In this regard, investors need a suitable mechanism to predict the selling price of the construction project and the resulting profit. Therefore, investors and stakeholders need a suitable model with the help of which they can make decisions such as choosing materials to guarantee the desired profit from the sale. This research will provide a framework for constructing models for estimating the price of residential units by considering some features of the building and some economic... 

    Probabilistic Modelig of the Earthquake-induced Losses Resulted from the Shock to Capital and Labor

    , M.Sc. Thesis Sharif University of Technology Doroudi, Omid (Author) ; Kashani, Hamed (Supervisor)
    Abstract
    Estimation of indirect economic losses due to natural disasters, especially earthquakes, is one of the essential issues in disaster management. This study presents a framework that uses an economic model of the community under study and calculates the indirect economic losses caused by an earthquake. To this end, first, the earthquake-induced direct economic losses are quantified using appropriate risk analysis models. The direct losses are used to characterize the consequent shock to labor and capital. These shocks are then used as inputs to the regional economic model. In the proposed framework, a Computable General Equilibrium (CGE) model uses various data about the state of the community... 

    Real Options Analysis Framework for the Optimal Timing of Network Infrastructure Systems Retrofits

    , M.Sc. Thesis Sharif University of Technology Roghani, Mehran (Author) ; Kashani, Hamed (Supervisor)
    Abstract
    Natural disasters can damage the infrastructure of society. Damages to the infrastructure components of society can disrupt their service delivery. Disruption in providing services to society's infrastructure can disrupt social and economic activities and impose various significant costs on society. The cost of repairing the damaged infrastructure and reducing the income of households are among the economic damages of accidents. The decline in the quality of life, as well as the death and injury of people due to the breakdown of the infrastructure or the disruption in their services, are among the social damages caused by accidents. In the same way, natural disasters are considered a... 

    Analysis of Seismic Vulnerability Reduction Policies of Residential Buildings Using a Multi-agent Evolutionary Game Model Based on Prospect Theory

    , M.Sc. Thesis Sharif University of Technology Hosseini, Ahmad (Author) ; Kashani, Hamed (Supervisor)
    Abstract
    Due to the vulnerability of urban fabric and residential buildings to earthquakes and considering its destructive social and economic effects on society, the need to adopt appropriate policies to prevent and reduce vulnerability, has been increasingly considered by policy makers. Despite the laws, regulations, incentives and penalties that policymakers have envisioned to prevent unprincipled and unsafe construction, evidence shows that a significant number of new buildings being built in the country are not earthquake resistant and there are many violations in design, implementation and supervision that is done by the stakeholders. To solve this problem, research has been done on the... 

    Contested framings and policy controversies: Analysing biosafety policy-making in Iran

    , Article Science and Public Policy ; Volume 40, Issue 5 , 2013 , Pages 616-627 ; 03023427 (ISSN) Kashani, E. S ; Millstone, E ; Sharif University of Technology
    2013
    Abstract
    Vigorous debates have taken place within and between many countries about regulatory policy regimes covering the assessment and approval of genetically modified (GM) crops. In Iran, a very vigorous and hotly contested policy debate concerning legislation covering GM crops occurred between 2004 and 2009, but it was confined within government circles with almost no public discussion. This paper analyses the Iranian policy-making process in the period 2006-9. It explains how and why a stalemate arose in disputes between ministries and departments. The chosen analytical framework draws mainly on the regulation of technological risks and the analysis of public policy-making. It deploys the... 

    Seismic fragility assessment of concrete gravity dams using nonlinear dynamic analysis with mass foundation

    , Article 9th US National and 10th Canadian Conference on Earthquake Engineering 2010, Including Papers from the 4th International Tsunami Symposium, 25 July 2010 through 29 July 2010, Toronto, ON ; Volume 1 , 2010 , Pages 185-194 ; 9781617388446 (ISBN) Ghaemian, M ; Mirzahossein Kashani, S ; Sharif University of Technology
    2010
    Abstract
    Maintaining of concrete gravity dams in good conditions as one of the important infrastructures is significant concern for dam owners. These dams should able to continue their function after a disaster such as earthquake. But most of them are aged dams with some located near faults. Indeed, there are some concerns regarding the performance of these dams under the effect of seismic loads. In recent years some criteria about linear performance of these dams have been developed. But the same cannot be said about nonlinear behavior of these dams, which seem to lack well-developed criteria. In this paper we shall try to illustrate seismic fragility curves for concrete gravity dams by using... 

    Experts against precaution: Analyzing the process of biosafety regulation in Iran

    , Article New Genetics and Society ; Volume 35, Issue 1 , 2016 , Pages 29-48 ; 14636778 (ISSN) Souzanchi Kashani, E ; Millstone, E ; Sharif University of Technology
    Routledge  2016
    Abstract
    The process of preparing and enacting a bio1safety law in Iran lasted more than a decade. This paper examines the process of biosafety policy-making in Iran in relation to the Cartagena Protocol on Biosafety (CPB) and to domestic Iranian factors. While some scholars argued that the CPB would be influential in developing countries, our findings indicate that it was not particularly important in Iranian biosafety legislation. This paper outlines the internal Iranian political processes, which initially envisaged a very precautionary approach, but which concluded with a biosafety law designed to promote the adoption of these technologies. Reference will be made to the changing influence of... 

    A Framework to Evaluate the Resilience of Hospitals

    , M.Sc. Thesis Sharif University of Technology Khanmohammadi, Sadegh (Author) ; Kashani, Hamed (Supervisor)
    Abstract
    In the aftermath of earthquakes, hospitals serve the critical role of treating casualties and reducing mortalities and severe injuries. A hospital must be resilient to play its role correctly after the earthquake. A resilient hospital is able to maintain its functionality at an acceptable level and provide service to the injured. In order to enhance the resilience of a hospital, an appropriate framework is needed to evaluate the hospital resilience and determines the impact of modification actions. This framework should characterize the serviceability of a hospital in terms of an appropriate metric. In this framework, the behavior of a given hospital building in the event of an earthquake as... 

    Evolution of innovation system literature: Intellectual bases and emerging trends

    , Article Technological Forecasting and Social Change ; Volume 146 , 2019 , Pages 68-80 ; 00401625 (ISSN) Souzanchi Kashani, E ; Roshani, S ; Sharif University of Technology
    Elsevier Inc  2019
    Abstract
    The evolution of innovation system literature is scrutinized to delineate the conceptual trends over the past 30 years. We applied the Sigma index which is supposed to include not only the frontier contributions in the field but also the intellectual bases conveying transformative concepts. Our examination shows that after the establishment of the National Innovation System (NIS)as a principal framework, Regional IS literature emerged as a main branch during the period of 2002–2007, while Technological IS developed as the second main branch from 2007 to 2012. Surprisingly, Sectoral IS has not yet generated a separate constellation, whereas the period after 2012 mainly witnessed the emergence... 

    Modeling of the Flood-induced Failure of Community Infrastructure Systems with Emphasis on Food Supply Chain

    , M.Sc. Thesis Sharif University of Technology Daneshifar, Asma (Author) ; Kashani, Hamed (Supervisor)
    Abstract
    This study provides a probabilistic framework for assessing and quantifying flood damage to infrastructure. This framework models the state of the community's infrastructure after the occurrence of possible floods in five steps. The first step is to model the hazard using a set of models that determine the characteristics of potential floods. The second step is to model and estimate the damage to community buildings and infrastructure. In the third step, infrastructure serviceability is modeled. The infrastructures that are modeled in this study are water distribution network, power network, transportation networks and industrial facilities for processing agricultural products. In the fourth... 

    Probabilistic Modeling of the Repair Time and Cost of the Structural Components of Earthquake-damaged Buildings

    , M.Sc. Thesis Sharif University of Technology Emamgholi, Ali (Author) ; Kashani, Hamed (Supervisor)
    Abstract
    This study aims to investigate the cost and time uncertainty of the seismic repair process of structural elements in earthquake damaged buildings in Iran. In order to identify the most important type of structural system in the country, using the method of analytic hierarchy process (AHP), 39 activists in the field of construction were interviewed. Based on the results, in buildings with reinforced concrete materials, concrete moment frames and in buildings with steel materials, steel moment frames and braced steel braced frames are the most important structural systems. By selecting the structural component of lateral load-bearing in each of the mentioned structural systems and considering... 

    Pattern of Learning of Technological Capabilities in Knowledge Based Firms: Cases in Electronics Equipment Industry

    , M.Sc. Thesis Sharif University of Technology Zeinaloo, Mahdi (Author) ; Souzanchi Kashani, Ebrahim (Supervisor)
    Abstract
    Knowledge based companies have a very important role in progress toward an economy based on knowledge and technology. One of the most important issues about these companies is pattern of Learning Technological capabilities. This issue and the question about the focus of companies about acquire and development of technological capabilities are subjects that have instructive points for both minor and major scales, for companies themselves, and public directing and investing. In this paper pattern of learning of technological capabilities are reviewed for four Knowledge based companies in electronics equipment industry, also the time needed for acquiring levels of technological capabilities for... 

    A Framework to Forecast Highway Construction Materials Prices

    , M.Sc. Thesis Sharif University of Technology Faghih, Amir Mohsen (Author) ; Kashani, Hamed (Supervisor)
    Abstract
    Due¬ to the volatile nature of material prices, projecting highway construction costs are proven to be very difficult, leading to many challenges in cost estimation process. Bid preparations as well as project planning and control processes are also negatively affected by the concerns about the inaccuracy of cost projections. There is a growing body of evidence that suggests the use of inaccurate cost estimate can result in bid loss or profit loss for contractors and hidden price contingencies, delayed or cancelled projects, inconsistency in budgets and unsteady flow of projects for owner organizations. Analysis of historical data indicates that a relationship between construction materials... 

    A Historical Analysis of the Evolution of Dominant Industrial Development Approaches in the Age of Pahlavi in Iran

    , M.Sc. Thesis Sharif University of Technology Hosseini, Siavash (Author) ; Souzanchi Kashani, Ebrahim (Supervisor)
    Abstract
    Our country in no measure is considered as an industrial one, despite its chain of small, medium and large industries. The vague, general “developing” term might be the best term to assign to economic-industrial condition of our country. We have a fairly limited number of big industrial firms (BIF) which could continue operation without state’s supports in a world BIFs are considered as the key indices in industrial development. The question comes to mind with reading what came above is this study’s main question, “What went wrong?”. This study follows the historical approach to the question through a comprehensive case study. Historical case-study thus is our main research approach here....