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    Explaining the Concept of Civilization by using Theory of Constructive Perceptions with Emphasis on Knowledge and Technology as Components of Civilization

    , M.Sc. Thesis Sharif University of Technology Tahani, Ali (Author) ; Taghavi, Mostafa (Supervisor)
    The purpose of writing this thesis is to arrive at the concept of civilization. And in this process, using the constructive perception. My approach in constructive perception is different with approach of Allameh tabatabaei in constructive perception. In first chapter defining constructive perception as the perception that mind by analogy between two consepts makes the non-real relations and attributes it deliberated to the reality (the parties). Meanwhile, should have been constructive perception is the intermediary that stimulation our sense abut reality. These feelings can be tenderness or hatred or fear and hope and ... . In the second chapter we will show that the use of technology... 

    Evaluating the Rebound Effect Caused by Development and Application of Energy Efficient Technologies in a Sector of Economy

    , M.Sc. Thesis Sharif University of Technology Shaddel, Sara (Author) ; Saboohi, Yadollah (Supervisor) ; Roshandel, Ramin (Supervisor)
    Due to rapid growth of energy consumption in recent years, extensive efforts to improve energy efficiency in production and consumption sectors have been done in order to reduce energy consumption in these sectors. The primary assumption is that improving energy efficiency has a one-to-one impact on reducing energy consumption, but in practice this is not true in all cases. In fact, by elevating energy efficiency, the cost of energy services is decreased and, thus, remained accessible income is increased. This issue will increase the demand for all energy and non-energy commodities, therefore, it will have influence on their supply. The effects of this variation in supply can be spread in... 

    A deep look into the dynamics of saltwater imbibition in a calcite nanochannel: temperature impacts capillarity regimes

    , Article Langmuir ; Volume 36, Issue 31 , 2020 , Pages 9035-9046 Badizad, M. H ; Koleini, M. M ; Greenwell, H. C ; Ayatollahi, S ; Ghazanfari, M. H ; Sharif University of Technology
    American Chemical Society  2020
    This research concerns fundamentals of spontaneous transport of saltwater (1 mol·dm-3 NaCl solution) in nanopores of calcium carbonates. A fully atomistic model was adopted to scrutinize the temperature dependence of flow regimes during solution transport under CaCO3 nanoconfinement. The early time of capillary filling is inertia-dominated, and the solution penetrates with a near-planar meniscus at constant velocity. Following a transition period, the meniscus angle falls to a stabilized value, characterizing the capillary-viscous advancement in the calcite channel. At this stage, brine displacement follows a parabolic relationship consistent with the classical Lucas-Washburn (LW) theory.... 

    Development and application of model for planning and development of technology in Oil & Gas Upstream

    , M.Sc. Thesis Sharif University of Technology Kanani Maman, Yasser (Author) ; Saboohi, Yadollah (Supervisor)
    Products on Research and Development (R&D) are followed by Technology development. Projects on R&D are cost intensive and considerable of financial resources should be allocated. Optimal allocation of resources could be managed through cost effective strategy. Hence, a “Model for planning and development of technology” has been developed in the present work, which lends itself to the analysis of the industrial application of planning of technological development based on minimizing costs of both development and application of a technology. Mixed Integer Programming optimization model has been developed which enables studying the structure of R&D activities. This model is based on the concept... 

    Effect of high-efficient electric motors on efficiency improvement and electric energy saving

    , Article 3rd International Conference on Deregulation and Restructuring and Power Technologies, DRPT 2008, Nanjing, 6 April 2008 through 9 April 2008 ; 2008 , Pages 533-538 ; 9787900714138 (ISBN) Zabardast, A ; Mokhtari, H ; Sharif University of Technology
    In this paper, advantages of energy-efficient motors over standard-motors in terms of electrical energy saving and demand reduction in a tire-rubber factory are thoroughly evaluated. Energy-efficient motors reduce losses because of their better design, materials, and manufacturing. These motors are 2 to 8% more efficient than standard ones. Lengthening the core and using lower-electrical-loss steel, thinner stator laminations, and more copper in the windings reduce electrical losses. Because a motor consumes energy worth 4 to 10 times its own cost each year, energy-efficient motors often make economic sense in a wide variety of applications. At the end of this study, the amount of energy...