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    Method Developing of National Technology Roadmap for Heavy Turbofan Engine Industry based on Conceptual design

    , M.Sc. Thesis Sharif University of Technology Shamekhi, Vahid (Author) ; Mazaheri, Karim (Supervisor)
    In this thesis, a method developed for producing technology roadmap to identify technologies needed in design, construction and testing of turbofan engines. In the first phase and in scoping step, 10 years’ time horizon is determined. Then project organization and the role required are intended and after that the second phase that is technology roadmap formation is begun. Market identification, product identification by key success factors forms and experts are steps of this phase and determination of three generations of engine are results of product identification step. After that, the technology identification step is begun but simultaneously the technology mapping drawing steps for... 

    Evolutionary learning methodology: A case study of R&D strategy development

    , Article Technological Forecasting and Social Change ; Volume 80, Issue 5 , 2013 , Pages 956-976 ; 00401625 (ISSN) Hooshangi, S ; Arasti, M. R ; Hounshell, D. A ; Sahebzamani, S ; Sharif University of Technology
    This article concerns the notion of methodology in strategic management of R&D/technology. Though development of new tools and methods has received much attention during the recent decades, attention to understanding methodologies has remained disproportionally low. In this study we distinguish two methodologies that are used in strategic management of R&D/technology: planning methodology and evolutionary learning methodology. We mainly focus on defining and describing the origins, nature, and characteristics of the latter. We propose a framework for methodology selection by investigating context, content, and process factors. Using this framework, we provide supportive evidence for... 

    Planning a robust path for mobile robots in dynamic environment

    , Article 2009 14th International CSI Computer Conference, CSICC 2009, 20 October 2009 through 21 October 2009, Tehran ; 2009 , Pages 470-476 ; 9781424442621 (ISBN) Naderan Tahan, M ; Manzuri Shalmani, M. T ; Sharif University of Technology
    In this paper, we propose a new method for mobile robot path planning in dynamic environment when the trajectories of obstacles are unknown. Our algorithm first utilizes a global approach called clearance based probabilistic roadmap method to find a suitable path and then locally apply evolutionary algorithm to keep the structure of the path when obstacles collide with the path. As a result, the path will act like an elastic band. To reach real time applicability, a light fitness function is proposed compare to other genetic algorithms to reduce the computation time needed for calculating and repairing path. Simulation results show that our method not only can keep the original structure of... 

    A voronoi-based reactive approach for mobile robot navigation

    , Article 13th International Computer Society of Iran Computer Conference on Advances in Computer Science and Engineering, CSICC 2008, Kish Island, 9 March 2008 through 11 March 2008 ; Volume 6 CCIS , 2008 , Pages 901-904 ; 18650929 (ISSN); 3540899847 (ISBN); 9783540899846 (ISBN) Mohammadi, S ; Hazar, N ; Sharif University of Technology
    Robot navigation is a challenging problem in robotics, which involves determining of robot positioning relative to objects in the environment, and also the mobility of robot through obstacles without colliding into them. The former is known as localization, while the latter is called motion planning. This paper introduces a roadmap method for solving motion planning problem in a dynamic environment based on Generalized Voronoi Diagram (GVD). The efficiency of the proceeding work is verified by examining it in a sample home environment. © 2008 Springer-Verlag  

    One cube or more?

    , Article 59th International Astronautical Congress 2008, IAC 2008, Glasgow, 29 September 2008 through 3 October 2008 ; Volume 6 , 2008 , Pages 3792-3797 ; 9781615671601 (ISBN) Bakhtiari Mojaz, S ; Shahmari, E ; Molaverdikhani, K ; Jazebizadeh, H ; Taheran, M ; Sharif University of Technology
    In the recent years, many universities invest on cubesats to prepare an appropriate environment for their students to get their hands on real experiments including design, fabrication, test, launch, operation and analysis of a real satellite project. Now after 5 years of experimentation, it is time for leaders to define more practical goals beside training students. Orienting the budget that is annually being invested on such satellites in every country to a specific goal could be a driving force in opening a new chapter in the utilization of pico-satellites and the advantages they offer. As these tiny satellites are utilized based on low cost COTS and also are light weight enough to reduce... 

    A real-time clearance-based approach for motion planning of mobile robots

    , Article 7th IEEE International Conference on Cognitive Informatics, ICCI 2008, Stanford University, CA, 14 August 2008 through 16 August 2008 ; 2008 , Pages 394-401 ; 9781424425389 (ISBN) Naderan Tahan, M ; Iraji, R ; Manzuri Shalmani, M. T ; Sharif University of Technology
    In this paper, two different important quality metrics, clearance and execution time, for motion planning of mobile robots are studied. Then a new approach, called Clearance-Based Probabilistic Roadmap Method (CBPRM (c)), is proposed which in contrast to VV(c) method, Visibility-Voronoi with clearance c, beside satisfaction of a predefined clearance is very efficient in running time. This provides the CBPRM (c) to be applicable in dynamic environments which require realtime approaches. Experiments showed that the CBPRM(c) is able to generate paths with very low execution time considering determined clearance. © 2008 IEEE  

    Developing a model for integrating decisions in technology roadmapping by fuzzy PROMETHEE

    , Article Journal of Intelligent and Fuzzy Systems ; Volume 26, Issue 2 , 2014 , Pages 625-645 ; ISSN: 10641246 Ghazinoory, S ; Daneshmand Mehr, M ; Arasti, M. R ; Sharif University of Technology
    Roadmapping, a tool of strategic planning, visualize where and how an organization will be in the future. Visualization of strategic programs assists people in the organization to understand the strategy which is a key for implementing strategy successfully. A generic roadmap is included of three main layers such as; market, product and technology. Decision making in each layer are done separately because of the nature of each layer. Therefore, decisions in roadmapping can be done with different tools. Whiles, decisions in each layer of the roadmap cannot be done without considering the upper or lower layer decisions. In this study we propose Fuzzy PROMETHEE method for integrating decisions... 

    Multi-hop communications on wireless network-on-chip using optimized phased-array antennas

    , Article Computers and Electrical Engineering ; Volume 39, Issue 7 , 2013 , Pages 2068-2085 ; 00457906 (ISSN) Tavakoli, E ; Tabandeh, M ; Kaffash, S ; Raahemi, B ; Sharif University of Technology
    Network-on-Chip (NoC) as a promising design approach for on-chip interconnect fabrics could overcome the energy as well as synchronization challenges of the conventional interconnects in the gigascale System-on-Chips (SoC); The advantages of communication performance of traditional wired NoC will no longer be continued by the future technology scaling. Packets that travel between distant nodes of a large scale wired on-chip network significantly suffer from energy dissipation and latency due to the routing overhead at each hop. According to the International Technology Roadmap for Semiconductors annual report, the RFCMOS characteristics will be steadily improved by technology scaling. As the... 

    Introducing a roadmap to implement the universal manufacturing platform using axiomatic design theory

    , Article International Journal of Manufacturing Research ; Volume 5, Issue 2 , 2010 , Pages 252-269 ; 17500591 (ISSN) Mokhtar, A ; Houshmand, M ; Sharif University of Technology
    In competitive environment of quick market changes, developing an interoperable manufacturing system is a necessity. To realise interoperability, the exchange of part and product data must be independent of their platforms. There are two basic approaches for this purpose: i utilising interfaces ii utilising neutral formats. Standard for the Exchange of Product data (STEP) plays a significant role as a neutral data model to integrate design, manufacturing and other activities in product life cycle. To implement a Universal Manufacturing Platform (UMP), a systematic roadmap is required. The current paper proposes such a roadmap using the methodology of Axiomatic Design (AD)  

    Temperature-Dependent Comparison between Delay of CNT and Copper Interconnects

    , Article IEEE Transactions on Very Large Scale Integration (VLSI) Systems ; Volume 24, Issue 2 , 2016 , Pages 803-807 ; 10638210 (ISSN) Alizadeh, A ; Sarvari, R ; Sharif University of Technology
    Institute of Electrical and Electronics Engineers Inc 
    The performance of gigascale integration chips improves by cryogenic technologies such as subambient cooling. In these conditions, interconnects may perform at temperatures as low as 50 K. However, the local temperature of interconnects could easily be as high as 600 K at high-temperature chips. In this brief, we investigated the impact of temperature on delay of local, intermediate, and global interconnects of International Technology Roadmap for Semiconductors Node 2024. This is done for different values of interconnect width and length, nanotube diameter, and percentage of metallic carbon nanotubes (CNTs) in a grown bundle. Results are compared with those of copper counterpart. We showed... 

    An opto-electrical NoC with traffic flow prediction in chip multiprocessors

    , Article Proceedings - 2014 22nd Euromicro International Conference on Parallel, Distributed, and Network-Based Processing, PDP 2014 ; 2014 , Pages 440-443 Ghane, M ; Arjomand, M ; Sarbazi Azad, H ; Sharif University of Technology
    Network-on-Chip (NoC) paradigm has emerged as a revolutionary methodology to integrate numerous IP blocks on a single chip. The achievable performance of adopting NoCs is constrained by the performance limitation mainly imposed by the metal wires that are the physical realization of communication channels. According to the International Technology Roadmap for Semiconductors (ITRS) report, new interconnect paradigms providing huge bandwidth is in need for future products. The current wired channels have limited bandwidth, and consequently, they limit the performance enhancements that NoC architectures can provide. Optical interconnects are capable of achieving better performance via... 

    Technology planning system for the Iranian petroleum industry: lessons learned from sanctions

    , Article Technological Forecasting and Social Change ; Volume 122 , 2017 , Pages 170-178 ; 00401625 (ISSN) Hoshdar, F ; Ghazinoory, S ; Arasti, M ; Fassihi, S. F ; Sharif University of Technology
    Iran's petroleum industry is facing challenges including maturity of hydrocarbon fields, growing population of the nation that demands additional revenues from petroleum exports, and international economic sanctions that have limited access to technology sources. Restrictions from international technology providers have led managers of the industry enterprises to try to develop their needed technologies inside the country. The Ministry of Petroleum has supervised this and as a result, a technology planning systems has been developed and implemented since 2009. In this paper, an overview of the Iranian petroleum industry is provided from a technology planning perspective. The focus has been... 

    Nanotechnology-assisted EOR techniques: New solutions to old challenges

    , Article Society of Petroleum Engineers - SPE International Oilfield Nanotechnology Conference 2012 ; 2012 , Pages 382-396 ; 9781622761104 (ISBN) Ayatollahi, S ; Zerafat, M. M ; Sharif University of Technology
    SPE  2012
    Enhanced Oil Recovery techniques are gaining more attention worldwide as the proved oil reserves are declining and the oil price is hiking. Although many giant oil reservoirs in the world were already screened for EOR processes, the main challenges such as low sweep efficiency, costly techniques, possible formation damages, transportation of huge amounts of EOR agents to the fields especially for offshore cases, analyzing micro-scale multi-phase flow in the rock to the large scale tests and the lack of analyzing tools in traditional experimental works, hinder the proposed EOR processes. Our past experiences on using nanotechnology to the upstream cases, especially EOR processes, revealed... 

    An optimized phased-array antenna for intra-chip communications

    , Article LAPC 2011 - 2011 Loughborough Antennas and Propagation Conference, 14 November 2011 through 15 November 2011 ; November , 2011 , Page(s): 1 - 4 ; 9781457710155 (ISBN) Tavakoli, E ; Tabandeh, M ; Kaffash, S ; Sharif University of Technology
    The continued migration to smaller nanometer geometries brought fundamental limits to traditional on-chip hard wires performance. According to the International Technology Roadmap for Semiconductor (ITRS), feature size shrinking leads an increase in the operating frequency of RFCMOS devices. Thus, new interconnect methodologies such as radio frequency (RF) wireless can be employed on future chips projected for intra-chip wireless data communications. The size of Si integrated antenna in these frequencies will be several millimetres and the antenna length will be decrease by frequency increasing. In this paper, we have proposed an optimum radiation pattern achieved by a phased array (PA)... 

    E-election in digital society

    , Article Proceedings of the 3rd International Conference on Digital Society, ICDS 2009, 1 February 2009 through 7 February 2009, Cancun ; 2009 , Pages 24-29 ; 9780769535265 (ISBN) Isaai, M. T ; Firoozi, F ; Hemyari, M. R ; Sharif University of Technology
    Electronic Society today is one of main challenges of developing and developed countries. It plays a central role in the national development plans and thus many ICT based projects are dedicated to digital society development. In this regard, government organizations must reengineer their processes and structures to meet the e-government and e-society defined standards. All of these together will make processes electronically available to citizens and businesses and minimize physical attendance in organizations to get information and services. This article focuses on specific and challengeable area of digital society called "electronic election". The authors try to combine the ICT enabled... 

    Effect of number of faults on NoC power and performance

    , Article 13th International Conference on Parallel and Distributed Systems, ICPADS, Hsinchu, 5 December 2007 through 7 December 2007 ; Volume 1 , December , 2007 ; 15219097 (ISSN); 9781424418909 (ISBN) Ghadiry, M. H ; Nadi, M ; Manzuri Shalmani, M. T ; Rahmati, D ; Sharif University of Technology
    According to International Technology Roadmap for Semiconductors (ITRS), before the end of this decade, we will be entering the era of a billion transistors on a single chip. The major threat toward the achievement of billion transistor on a chip is poor scalability of current interconnect infrastructure. With the advent of "Network on Chip (NoC)" various characters and methodologies of traditional networks were hardly considered on-chip. Failure, Power and Area are the major concepts that should be considered when migrating from traditional interconnection networks to NoCs. In this paper we study the effects of faulty links and nodes on power and performance of mesh based NoC, Also several...