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    Implementing an automated feedback program for a foreign language writing course: A learner-centric study

    , Article Journal of Computer Assisted Learning ; Volume 37, Issue 5 , 2021 , Pages 1494-1507 ; 02664909 (ISSN) Hassanzadeh, M ; Fotoohnejad, S ; Sharif University of Technology
    John Wiley and Sons Inc  2021
    Considering the prominence attached to written corrective feedback (WCF) within the domain of second/foreign language (L2) acquisition, automated writing evaluation (AWE) tools have steadily gained ground over the last two decades. The current study was an attempt to investigate the extent incorporating an AWE program, known as Criterion®, within a process writing framework would affect learners' writing quality in an English as a foreign language context. Moreover, we drew a comparison between the overall effects of computer- versus teacher-generated WCF. Participants consisted of 53 tertiary level students from two intact essay-writing classes. The within-group findings revealed that the... 

    The theoretical investigation of the proposed optical fiber torsion sensor based on computer-generated-hologram (CGH)

    , Article Optics Communications ; Volume 463 , 2020 Esmailzadeh Noghani, F ; Tofighi, S ; Bahrampour, A. R ; Sharif University of Technology
    Elsevier B.V  2020
    Optical fiber torsion sensors have significant importance for structural health monitoring. In this paper, an optical fiber torsion sensor based on computer-generated-hologram (CGH) is proposed and investigated theoretically. In the proposed structure a dual mode fiber (DMF) is used as a sensing element. An acoustic source can be employed to induce a fiber grating. The acoustic induced fiber grating (AIFG) causes the fundamental LP01 mode of DMF couples to LP11 o and LP11 e fiber modes. In the presence of torsion in DMF, the profiles of LP01, LP11 o and LP11 e modes rotate relative to the absence of fiber torsion. At the end of DMF a suitable CGH can be employed to resolve spatially the... 

    Digital holography based submicron thermometry

    , Article Optics Express ; Volume 24, Issue 25 , 2016 , Pages 28678-28685 ; 10944087 (ISSN) Moradi, A ; Akhlaghi, E. A ; Hajizedeh, F ; Seyed ReihaniReihani, S. N ; Sharif University of Technology
    OSA - The Optical Society  2016
    Here we introduce a phase-shifting digital holography-based method to determine the temperature profile around an irradiated (sub-)micron spherical bead. The method utilizes a Mach-Zehnder interferometer implemented into an open setup microscope. The results of irradiated gold spheres with diameter of 400 nm and also silver-coated micron-sized silica beads embedded in silicone oil are presented. We show that the applied method is able to accurately determine the surface temperature with accuracy of 1 °C. Our experimental results perfectly confirm the theoretical prediction of temperature profile around the irradiated bead  

    Monitoring of Structure Characteristics, Humidity, Temperature and Torsion Using Optical Fiber Sensor

    , Ph.D. Dissertation Sharif University of Technology Esmailzadeh Noghani, Fereshteh (Author) ; Bahrampour, Alireza (Supervisor) ; Tofighi, Sara (Supervisor)
    Fiber optic sensors have found industrial applications due to their unique characteristics and wide range of environmental parameters. Specifically, distributed optical fiber sensors which have applications in borders protection, intrusion detection, oil and gas leakage detection and smart irrigation of farms and gardens, have attracted significant attention from research groups around the world in recent years. According to the forecasts, among all kind of optical fiber sensors, the temperature and acoustic/vibration sensors will seize the market during the coming years. In this thesis, three kind of optical fiber sensors are proposed for environment health monitoring. First, distributed... 

    Simulation and visualization environment for nonlinear helicopter flight dynamics

    , Article General Aviation Technology Conference and Exhibition, Wichita, KS, 29 August 2006 through 31 August 2006 ; 2006 ; 01487191 (ISSN) Nasiri, M ; Rezazade, M ; Sharif University of Technology
    SAE International  2006
    The Analytic 6 D.O.F. dynamic model of a helicopter is developed for 3D computer generated imagery simulator. Analytic expressions for the forces and moments on the various helicopter components are derived. By using the forces and moments equilibrium, helicopter trim point is determined using Newton's method of solving the nonlinear set of trim equations. The equations of motion for the fuselage six degree of freedom are assembled by applying Newton's law of motion relating the applied forces and moments to the resulting translational and rotational acceleration. Visual C++ programming software, utilized as a platform will interact to MATLAB Aircraft Instrument ActiveX and 3DSTATE for... 

    Pulsatile blood flow in total cavopulmonary connection: a comparison between Y-shaped and T-shaped geometry

    , Article Medical and Biological Engineering and Computing ; Volume 55, Issue 2 , 2017 , Pages 213-224 ; 01400118 (ISSN) Rajabzadeh Oghaz, H ; Firoozabadi, B ; Saidi, M. S ; Monjezi, M ; Navabi Shirazi, M. A ; Malakan Rad, E ; Sharif University of Technology
    Springer Verlag  2017
    Single-ventricle anomaly is a hereditary heart disease that is characterized by anatomical malformations. The main consequence of this malformation is desaturated blood flow, which without proper treatment increases the risk of death. The classical treatment is based on a three-stage palliative procedure which should begin from the first few days of patient’s life. The final stage is known as Fontan procedure, in which inferior vena cava is directly connected to pulmonary arteries without going through the ventricle. This connection is called total cavopulmonary connection (TCPC). After surgery, the single ventricle supplies adequate and saturated systemic blood flow to the body; however,...