Search for: expenditure
Total 27 records
Experimental and numerical study of the gas-gas separation efficiency in a Ranque-Hilsch vortex tube, Article Separation and Purification Technology ; Vol. 138, issue , Dec , 2014 , p. 177-185 ; Farhadi, F ; Sharif University of Technology
A brass vortextube is used to carry out a series of experiments. The main objective of the present research is to investigate the separation performances of a vortex tube (VT) for a hydrocarbon mixture. Examination is also applied to study the effects of nozzle intakes number and cold fraction on the gas species separation at specific inlet pressure 236.37 kPa in a VT with two gas mixtures (LPG as a hydrocarbon mixture and LPG-N2). A two-dimensional computational fluid dynamic (CFD) model simulation of a VT is presented. CFD code after validation is also applied to investigate the role of cold fraction and nozzle intakes number on the gas species separation. The highly rotating flow field...
Article International Journal of Greenhouse Gas Control ; Volume 12 , 2013 , Pages 460-471 ; 17505836 (ISSN) ; Soltanieh, M ; Abbaspour, M ; Atabi, F ; Sharif University of Technology
In this study, the prospects of energy efficiency potential, clean development mechanism (CDM) and carbon income up to and beyond 2012 are investigated in the petrochemical industries of Iran as a major oil-producing country. This paper is to address four questions of: (1) the GHGs emission in Iranian petrochemical complexes, (2) the most energy-consuming processes, (3) units with the highest energy efficiency potentials and (4) potentials of CDM or similar carbon projects based on post-2012 scenarios. The petrochemical processes are investigated in two categories of non-polymeric and polymeric productions. Based on capital expenditure, economic saving, simple payback period, CO2 equivalent...
Studying the effect of kinematical pattern on the mechanical performance of paraplegic gait with reciprocating orthosis, Article Proceedings of the Institution of Mechanical Engineers, Part H: Journal of Engineering in Medicine ; Volume 226, Issue 8 , 2012 , Pages 600-611 ; 09544119 (ISSN) ; Farahmand, F ; Salarieh, H ; Sharif University of Technology
Paraplegic users of mechanical walking orthoses, e.g. advanced reciprocating gait orthosis (ARGO), often face high energy expenditure and extreme upper body loading during locomotion. We studied the effect of kinematical pattern on the mechanical performance of paraplegic locomotion, in search for an improved gait pattern that leads to lower muscular efforts. A three-dimensional, four segment, six-degrees-of-freedom skeletal model of the advanced reciprocating gait orthosis-assisted paraplegic locomotion was developed based on the data acquired from an experimental study on a single subject. The effect of muscles was represented by ideal joint torque generators. A response surface analysis...
M.Sc. Thesis Sharif University of Technology ; Nili, Farhad
This thesis analyzes the behavior of inflation in the Iranian economy by introducing a micro-founded model of monetary policy. The model predicts a direct relationship between inflation and oil export revenues in the oil dependent economy of Iran. This theory driven claim is verified empirically, and test results tend to confirm a meaningful relationship between inflation and Oil export data in Iran. Based on results attained from the micro-founded model, an augmented SVAR model is proposed for estimating underlying inflation in the Iranian economy. The proposed model is found to render better results than the conventional models used for estimating underlying inflation. Moreover it is...
M.Sc. Thesis Sharif University of Technology ; Barakchian, S.Mahdi
In this thesis, we quantify the extent to which the self-employed systematically under-report their income in Iran households survey by using expenditure based method. The method applied is an improvement of Pissarides and Weber (1989) method which is based on the Engel curve, describing the relationship between incomes and expenditures. In this method, we can estimate the exact amount of average underreporting instead of offering estimation interval.The relationship between incomes and expenditures of wage and salary workers is used to infer the actual income, and thus the reporting gap, of the self-employed based on their reported expenditures. We find that the self-employed underreport...
M.Sc. Thesis Sharif University of Technology ; Nili, Masoud
In this thesis the impact of inflation on urban household saving is investigated. For calculating sensitivity of saving respect to price changing of different groups of commodities, firstly we divided household cost to two separated groups of durable and nondurable and then by defining total income as summation of monetary and nonmonetary income of households, We consider saving as total income minuses nondurable consumption. Finally we estimated the “Extended Linear Expenditure System” model base on the prepared data. Since inflation is result of unequal changes in prices of goods and services, the approach of expenditure system allows us to assess unequal changes in prices for eight...
M.Sc. Thesis Sharif University of Technology ; Nili, Masoud
The procyclical behavior of public investment expenditure in OECs is one of the main channels through which the blessing of the natural resource abundance turns into a curse. The focal issue about the public investment expenditures in OECs is the misallocation and the inefficiency of these expenditures which often appear in the form of white elephants- i.e. government investment projects with large scale and high social/political prestige for the politicians implementing theme, but with negative economic return- especially in the oil booms. Moreover, the imprical evidence shows that the efficiency of public investment management in OECs is positively and significantly correlated with the...
Article Technological Forecasting and Social Change ; May , 2016 ; 00401625 (ISSN) ; Bagheri Nasrabadi, M ; Yazdi, N ; Babakhan, A. R ; Sharif University of Technology
Elsevier Inc 2016
The debate over innovativeness of large firms and SMEs, which was bolded by Schumpeter, still continues under mixed empirical evidences. There are several implications for this debate including policy orientation in support of large firms or SMEs. But there is a scarce of studies in developing countries and no such study in Iran yet. The present study has explored the proportionality of increase of innovation activity versus firm size within 522 Iranian knowledge-based firms categorized in 9 industries. Innovation activity was measured by R&D expenditure while firm size stood for number of employees. Using log-log regression in the first phase, it was found that R&D expenditure confirms a...
Article Energy Sources, Part A: Recovery, Utilization and Environmental Effects ; Volume 37, Issue 14 , 2015 , Pages 1479-1486 ; 15567036 (ISSN) ; Bolouri, S. H ; Sharif University of Technology
Taylor and Francis Inc 2015
An integrated model is proposed for simultaneous study of CO
2-flood enhanced oil recovery and sequestration in both technical and economic points of view. Based on this model, Green Balance software is developed for quick estimation of performance and profitability of CO 2-flood enhanced oil recovery and carbon capture and storage projects. This software benefits users to do sensitivity analyses in extended times, easily and quickly. Several sensitivity analyses were done and effects of reservoir parameters and economic expenditures and taxes were studied. Among all affecting parameters, the role of tax per CO 2 emission is the most important one. The use of...
Article Energy Sources, Part B: Economics, Planning and Policy ; Volume 11, Issue 12 , 2016 , Pages 1097-1102 ; 15567249 (ISSN) ; Nouri Khorasani, A ; Baghalha, M ; Pazos Costa, A ; Sharif University of Technology
Taylor and Francis Inc 2016
An analysis of carbon dioxide (CO2) removal process from synthesis gas has been carried out in this work. CO2 removals by physical and chemical solvents are the most often used. The most important factors that affect cost and performance of a CO2 recovery unit are the number of flash drum separation units, and the pressure drop pattern among them. Different variations of this process were simulated using Hysys software, and the capital and operational expenditures for these plants were estimated. The focus was to reach an optimum process to minimize the total unit cost of separated CO2. The results indicate that for a fixed number of separation units, the case with uniform pressure drop...
A System Dynamics Approach to Understanding the Dynamics of the Increase of Health Expenditures Share of GDP in Germany, M.Sc. Thesis Sharif University of Technology ; Mashayekhi, Alinaghi
The main question of this research is this: what mechanisms drive the increase of the share of health costs in GDP in Germany? Answering this question not only improves our understanding about health systems in general, but also is specifically useful for the health system of Iran, since it is experiencing similar trends as the health system of Germany does. Since these mechanisms are complex and the ability of human brain to process several interacting variables simultaneously is low, we need a strong methodology and a tool to overcome this limitation. System thinking as a methodology and system dynamics as its tool help us do so. Using system dynamics, we will develop a computer model...
Article Technological Forecasting and Social Change ; Volume 122 , 2017 , Pages 179-185 ; 00401625 (ISSN) ; Bagheri Nasrabadi, M ; Yazdi, N ; Babakhan, A. R ; Sharif University of Technology
The debate over innovativeness of large firms and SMEs, which was bolded by Schumpeter, still continues under mixed empirical evidences. There are several implications for this debate including policy orientation in support of large firms or SMEs. But there is a scarce of studies in developing countries and no such study in Iran yet. The present study has explored the proportionality of increase of innovation activity versus firm size within 522 Iranian knowledge-based firms categorized in 9 industries. Innovation activity was measured by R&D expenditure while firm size stood for number of employees. Using log–log regression in the first phase, it was found that R&D expenditure confirms a...
Ph.D. Dissertation Sharif University of Technology ; Sarbazi-Azad, Hamid
Hyperscale cloud data center (HCDC) (a.k.a., hyperscale data center) is the backbone of a wide variety of Internet services such as web-hosting, ecommerce, social networking, software as a service (SaaS), platform as a service (PaaS), application as a service (AaaS), and cloud computing.HCDC platforms consist of massive parallel processing, high utilization rate, and high volume storage that cost hundreds of million dollars.The increased demand for various Internet services and the subsequent dramatic growth in HCDC platforms, have caused an exponential increase in utilization of energy. With energy costs on the rise and global attention focused on carbon footprints, organizations are...
Energy-efficient fast configuration of flexible transponders and grooming switches in OFDM-based elastic optical networks, Article Journal of Optical Communications and Networking ; Volume 10, Issue 2 , 2018 , Pages 90-103 ; 19430620 (ISSN) ; Pakravan, M. R ; Sharif University of Technology
Institute of Electrical and Electronics Engineers Inc 2018
We investigate the problem of energy-efficient resource allocation constrained to quality of service and physical requirements in orthogonal frequency division multiplexing (OFDM)-based elastic optical networks and propose a fast two-stage algorithm to solve it. The first stage of the proposed algorithm deals with routing, traffic grooming, and traffic ordering and mainly aims at minimization of the number of deployed optical amplifiers and transponders. We provide an integer linear program for routing and traffic grooming and propose a heuristic procedure, which yields its near-optimum solution in a shorter runtime. In the second stage, we optimize transponder parameters to minimize total...
Planning for investment in energy innovation: Developing an analytical tool to explore the impact of knowledge flow, Article International Journal of Energy Economics and Policy ; Volume 8, Issue 2 , 2018 , Pages 7-19 ; 21464553 (ISSN) ; Saboohi, Y ; Sharif University of Technology
The major objective of this study is to provide an analytical tool to identify the role of investment on innovation in the process of new technologies development. To achieve this goal, a model of knowledge flow is developed and the effects of national and international knowledge spillovers are investigated. Results show that when knowledge spillovers are modelled in the Nordic countries, the required investment on domestic energy R&D decreases and the cumulative knowledge increases to 10.7 billion USD by 2030. This is a significant economic potential for technological innovation which can be considered for both energy researchers and energy planners. Finally, some important policy insights...
Planning Latency-Aware Multilayer IP-over-Elastic Optical Networks Supporting Various Survivability Mechanisms, M.Sc. Thesis Sharif University of Technology ; Salehi, Javad ; Beyranvand, Hamzeh
The growth of traffic in metro and core networks is not deniable today, in addition to the volume of traffic, their different requirement force operators to dimension IP over optical network for the peak traffics and also cares about requirements of the traffics. this multi-policy enabled network using new extended technology such as Elastic Optical Network and Bandwidth variable transponders is used to design network with minimum cost and resource. There is different quality of service parameter, in this work we focus on end to end latency and survivability. we present ILP formulation for the IP over elastic optical network and introduce these parameters to this formulation, as we know...
M.Sc. Thesis Sharif University of Technology ; Vesal, Mohammad
Does the household attribute changes to its economic conditions during the term of the MPs, and chooses to vote with regard to these conditions, including income and employment status, or who decides, regardless of economic characteristics, in this regard Takes? In this study, using micro data of the household income and expenditure survey and building a sample household for each district, we compute economic characteristics for each election district including total income, total cost, employment rate, employment in the government sector, and unemployment rate. . Election data includes the name, vote and status of the candidates for the ninth and tenth Islamic Consultative Assembly...
Evaluation of Gender Discrimination in the Allocation of Educational Expenditure in the Iranian’s Household
Sharif University of Technology
Fatemi Ardestani, Farshad
In the past few decades a range of human capital theories were developed by economists. In all these, education and training are considered as a prominent aspect of the human capital. Among all influential factors on the education, the role of the family in the allocation of educational expenditure is one of the most important factors. In this research, we investigate whether in gendr discrimination among sibiling is observed in Iranian households. Based on household budget data, we estimate the Engel curve in order to investigate the gender discrimination in the allocation of educational expenditure. Families divided into 6 clusters based on the composition of their children and the tests...
The influence of public R&D and knowledge spillovers on the development of renewable energy sources: The case of the Nordic countries, Article Technological Forecasting and Social Change ; Volume 146 , 2019 , Pages 450-463 ; 00401625 (ISSN) ; Saboohi, Y ; Arasti, M ; Sharif University of Technology
Elsevier Inc 2019
Energy innovation is a key requirement to limit global warming and tackle climate change in the years to come. A better understanding of the public R&D mechanism is likely to improve allocation of resources for energy innovation. Thus, the present paper evaluates the impacts of public R&D and knowledge spillovers on the development of renewable energy sources. To achieve this goal, knowledge flow has been modeled as a function of public R&D expenditures, cumulative knowledge stocks and knowledge spillovers. To show the application of the model, the Nordic countries as one of the pioneers in renewable technologies have been chosen. Results show the cumulative knowledge stock will increase to...
Past, present, and future of global health financing: a review of development assistance, government, out-of-pocket, and other private spending on health for 195 countries, 1995–2050, Article The Lancet ; Volume 393, Issue 10187 , 2019 , Pages 2233-2260 ; 01406736 (ISSN) ; Cowling, K ; Micah, A. E ; Chapin, A ; Chen, C. S ; Ikilezi, G ; Sadat, N ; Tsakalos, G ; Wu, J ; Younker, T ; Zhao, Y ; Zlavog, B. S ; Abbafati, C ; Ahmed, A. E ; Alam, K ; Alipour, V ; Aljunid, S. M ; Almalki, M. J ; Alvis Guzman, N ; Ammar, W ; Andrei, C. L ; Anjomshoa, M ; Antonio, C. A. T ; Arabloo, J ; Aremu, O ; Ausloos, M ; Avila Burgos, L ; Awasthi, A ; Ayanore, M. A ; Azari, S ; Azzopardi Muscat, Natasha ; Bagherzadeh, M ; Bärnighausen, T. W ; Baune, B. T ; Bayati, M ; Belay, Y. B ; Belay, Y. A ; Belete, H ; Berbada, D. A ; Berman, A. E ; Beuran, M ; Bijani, A ; Busse, R ; Cahuana Hurtado, L ; Cámera, L. A ; Catalá López, F ; Chauhan, B.G ; Constantin, M. M ; Crowe, C. S ; Cucu, A ; Dalal, K ; De Neve, J. W ; Deiparine, S ; Demeke, F. M ; Do, H. P ; Dubey, M ; El Tantawi, M ; Eskandarieh, S ; Esmaeili, R ; Fakhar, M ; Fazaeli, A. A ; Fischer, F ; Foigt, N. A ; Fukumoto, T ; Fullman, N ; Galan, A ; Gamkrelidze, A ; Gezae, K. E ; Ghajar, A ; Ghashghaee, A ; Goginashvili, K ; Haakenstad, A ; Bidgoli, H. H ; Hamidi, S ; Harb, H. L ; Hasanpoor, E ; Hassen, H. Y ; Hay, S. I ; Hendrie, D ; Henok, A ; Heredia-Pi, I ; Herteliu, C ; Hoang, C. L ; Hole, M. K ; Rad, E. H ; Hossain, N ; Hosseinzadeh, M ; Hostiuc, S ; Ilesanmi, O. S ; Irvani, S. S. N ; Jakovljevic, M ; Jalali, A ; James, S. L ; Jonas, J. B ; Jürisson, M ; Kadel, R ; Matin, B. K ; Kasaeian, A ; Kasaye, H. K ; Kassaw, M. W ; Karyani, A. K ; Khabiri, R ; Khan, J ; Khan, M. N ; Khang, Y. H ; Kisa, A ; Kissimova Skarbek, Katarzyna ; Kohler, S ; Koyanagi, A ; Krohn, K. J ; Leung, R ; Lim, L. L ; Lorkowski, S ; Majeed, A ; Malekzadeh, R ; Mansourian, M ; Mantovani, L. G ; Massenburg, B. B ; Mckee, M ; Mehta, V ; Meretoja, A ; Meretoja, T. J ; Kostova, N. M ; Miller, T. R ; Mirrakhimov, E. M ; Mohajer, B ; Darwesh, A. M ; Mohammed, S ; Mohebi, F ; Mokdad, A. H ; Morrison, S. D ; Mousavi, S. M ; Muthupandian, S ; Nagarajan, A. J ; Nangia, V ; Negoi, I ; Nguyen, C. T ; Nguyen, H. K. T ; Nguyen, S. H ; Nosratnejad, S ; Oladimeji, O ; Olgiati, S ; Olusanya, J. O ; Onwujekwe, O. E ; Otstavnov, S. S ; Pana, A ; Pereira, D. M ; Piroozi, B ; Prada, S.I ; Qorbani, M ; Rabiee, M ; Rabiee, N ; Rafiei, A ; Rahim, F ; Rahimi Movaghar, Vafa ; Ram, U ; Ranabhat, C. L ; Ranta, A ; Rawaf, D. L ; Rawaf, S ; Rezaei, S ; Roro, E. M ; Rostami, A ; Rubino, S ; Salahshoor, M ; Samy, A. M ; Sanabria, J ; Santos, J. V ; Milicevic, M. M. S ; Sao Jose, B. P ; Savic, M ; Schwendicke, F ; Sepanlou, S. G ; Sepehrimanesh, M ; Sheikh, A ; Shrime, M. G ; Sisay, S ; Soltani, S ; Soofi, M ; Srinivasan, V ; Tabarés Seisdedos, R ; Torre, A ; Tovani-Palone, M. R ; Tran, B. X ; Undurraga, E. A ; Valdez, P. R ; Van Boven, J. F. M ; Vargas, V ; Veisani, Y ; Violante, F. S ; Vladimirov, S. K ; Vlassov, V ; Vollmer, S ; Vu, G. T ; Wolfe, C. D. A ; Yonemoto, N ; Younis, M. Z ; Yousefifard, M ; Zaman, S. B ; Zangeneh, A ; Zegeye, E. A ; Ziapour, A ; Chew, A ; Murray, C. J. L ; Dieleman, J. L ; Sharif University of Technology
Lancet Publishing Group 2019
Background: Comprehensive and comparable estimates of health spending in each country are a key input for health policy and planning, and are necessary to support the achievement of national and international health goals. Previous studies have tracked past and projected future health spending until 2040 and shown that, with economic development, countries tend to spend more on health per capita, with a decreasing share of spending from development assistance and out-of-pocket sources. We aimed to characterise the past, present, and predicted future of global health spending, with an emphasis on equity in spending across countries. Methods: We estimated domestic health spending for 195...