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    “Does cinema form the future of robotics?”: a survey on fictional robots in sci-fi movies

    , Article SN Applied Sciences ; Volume 3, Issue 6 , 2021 ; 25233971 (ISSN) Saffari, E ; Hosseini, S. R ; Taheri, A ; Meghdari, A ; Sharif University of Technology
    Springer Nature  2021
    Abstract
    Abstract: Robotics and Artificial Intelligence (AI) have always been among the most popular topics in science fiction (sci-fi) movies. This paper endeavors to review popular movies containing Fictional Robots (FR) to extract the most common characteristics and interesting design ideas of robots portrayed in science fiction. To this end, 134 sci-fi films, including 108 unique FRs, were investigated regarding the robots’ different design aspects (e.g., appearance design, interactive design and artificial intelligence, and ethical and social design). Also, in each section of this paper, some characteristics of FRs are compared with real social robots. Since some researches point to the... 

    Design and Fabrication of an Optimized Wake Equalizing Duct in Order to Improve Propulsion System Operation

    , M.Sc. Thesis Sharif University of Technology Ali Mirzazadeh, Siamak (Author) ; Seif, Mohammad S (Supervisor) ; Rad, Manouchehr ($item.subfieldsMap.e)
    Abstract
    Special geometrical sections, known as “duct”, which can be installed on merchant vessels stern in order to improve propulsion system and propeller performance, today have evolved considerably. The force which produces by the propeller depends on efficiency of propulsion system. In the way of improving the efficiency of propulsion systems, by using these special geometrical sections, to much research have been done from the mid-twentieth century. The Wake Equalizing Ducts (WEDs) in addition to conduct the more uniform fluid flow to the propeller disk (which causes to improve the propeller operation), affect on flow separation in ship stern zone and will decrease the separated flow zone.... 

    Using Body Fluids for Early Prostate Cancer Detection

    , M.Sc. Thesis Sharif University of Technology Jalali Dowlatshahi, Sayeh (Author) ; Abdekhodaie, Mohammad Jafar (Supervisor)
    Abstract
    Today, despite the notable progress in diagnostics and therapeutics, cancer remains the second cause of death worldwide. This rather high mortality rate is often attributed to cancers diagnosed at late stages, including prostate cancer. Among the techniques approved for prostate cancer diagnosis, total or free prostate-specific antigen screening using blood serum samples is the sole method able to detect prostate cancer at an early stage. This test has led to a significant decrease in prostate cancer-related deaths. Nonetheless, it possesses several drawbacks, such as the complex, costly, and time-consuming conventional methods utilized in clinical laboratories to assess the concentration of... 

    Sustainable Analysis of Unions Uses Axiomatic Design Theory with Focus on European Union

    , M.Sc. Thesis Sharif University of Technology Torbati, Mostafa (Author) ; Malaek, S. M (Supervisor)
    Abstract
    In this project, we examine the stability or sustainability issue in unions, in other words we want to know whether integration in European Union is stable? Countries have positive attitude toward unions and being member in unions is at special priorities. The main reason for countires is improve economy and national Security.
    The main question in this research is modeling European Union with Axiomatic Design Theory and analysis of sustainability based on this theory. This study has attempted to push Axiomatic Design Theroy in the new field of Systems Engineering and also it gives a new and differnet approach to stability.
     

    {0, 2}-Degree free spanning forests in graphs

    , Article Discrete Mathematics ; Volume 338, Issue 7 , July , 2015 , Pages 1226-1231 ; 0012365X (ISSN) Akbari, S ; Ozeki, K ; Rezaei, A ; Rotabi, R ; Sabour, S ; Sharif University of Technology
    Elsevier  2015
    Abstract
    Let G be a graph and S be a set of non-negative integers. By an S-degree free spanning forest of G we mean a spanning forest of G with no vertex degree in S. In this paper we study the existence of {0,2}-degree free spanning forests in graphs. We show that if G is a graph with minimum degree at least 4, then there exists a {0,2}-degree free spanning forest. Moreover, we show that every 2-connected graph with maximum degree at least 5 admits a {0,2}-degree free spanning forest, and every 3-connected graph admits a {0,2}-degree free spanning forest  

    vThe effect of saddle-assistive device on improving the gait parameters of patients with the lower limbs weakness: a pilot study

    , Article Journal of Bionic Engineering ; Volume 17, Issue 6 , 2020 , Pages 1175-1185 Hojjati Najafabadi, A ; Amini, S ; Farahmand, F ; Sharif University of Technology
    Springer  2020
    Abstract
    To help walking, using assistive devices can be considered to reduce the loads caused by weight and to effectively decrease the propulsive forces. In this study, a mobility Saddle-Assistive Device (S-AD) supporting body weight while walking was evaluated on two healthy volunteers. This device is based on the support of body weight against gravity with the help of a saddle, which is not used in other passive mobility assistive devices. To prove the efficiency of this device, the experimental results obtained while walking with this device were compared with those related to walking without the assistive device. The results showed that this device could significantly reduce the forces and... 

    simulation of thermo-hydro-mechanical processes at Soultz-sous-Forêts

    , Article Energies ; Volume 15, Issue 24 , 2022 ; 19961073 (ISSN) Mahmoodpour, S ; Singh, M ; Mahyapour, R ; Tangirala, S. K ; Bär, K ; Sass, I ; Sharif University of Technology
    MDPI  2022
    Abstract
    Porosity and permeability alteration due to the thermo-poro-elastic stress field disturbance from the cold fluid injection is a deciding factor for longer, more economic, and safer heat extraction from an enhanced geothermal system (EGS). In the Soultz-sous-Forêts geothermal system, faulted zones are the main flow paths, and the resulting porosity–permeability development over time due to stress reorientation is more sensitive in comparison with the regions without faulted zones. Available operational and field data are combined through a validated numerical simulation model to examine the mechanical impact on the pressure and temperature evolution. Results shows that near the injection... 

    prediction of time to failure in stress corrosion cracking of 304 stainless steel in aqueous chloride solution by artificial neural network

    , Article Protection of Metals and Physical Chemistry of Surfaces ; Volume 45, Issue 5 , 2009 , Pages 610-615 ; 20702051 (ISSN) Lajevardi, S. A ; Shahrabi, T ; Baigi, V ; Shafiei, A. M ; Sharif University of Technology
    2009
    Abstract
    Despite the numerous researches in Stress Corrosion Cracking (SCC) risk of austenitic stainless steels in aqueous chloride solution, no formulation or reliable method for prediction of time to failure as a result of SCC has yet been defined. In this paper, the capability of artificial neural network for estimation of the time to failure for SCC of 304 stainless steel in aqueous chloride solution together with sensitivity analysis has been expressed. The output results showed that artificial neural network can predict the time to failure for about 74% of the variance of SCC experimental data. Furthermore, the sensitivity analysis also demonstrated the effects of input parameters (Temperature,... 

    n the calculation of the leakage inductance in transformers with nonideal windings

    , Article IEEE Transactions on Power Electronics ; Volume 35, Issue 8 , 2020 , Pages 8460-8471 Aghaei, M ; Mohsenzade, S ; Kaboli, S ; Sharif University of Technology
    Institute of Electrical and Electronics Engineers Inc  2020
    Abstract
    The transformer leakage inductance (TLI) is an important parameter in the design phase of the isolated power supplies. Hence, the TLI estimation before the transformer construction is very useful for the designers. The previous works considered an ordered winding turn arrangement (WTA) for the transformers. This assumption considers only ideal windings which may result in a significant error from what will be achieved after the construction of the transformer. This article concentrates on the transformers with nonideal windings in which the turns are not ordered. The uneven distribution of the turns in the layers is mainly due to the wrapping machine error. Hence, for a specific transformer... 

    miRNA-encapsulated abiotic materials and biovectors for cutaneous and oral wound healing: Biogenesis, mechanisms, and delivery nanocarriers

    , Article Bioengineering and Translational Medicine ; 2022 ; 23806761 (ISSN) Deka Dey, A ; Yousefiasl, S ; Kumar, A ; Dabbagh Moghaddam, F ; Rahimmanesh, I ; Samandari, M ; Jamwal, S ; Maleki, A ; Mohammadi, A ; Rabiee, N ; Cláudia Paiva-Santos, A ; Tamayol, A ; Sharifi, E ; Makvandi, P ; Sharif University of Technology
    John Wiley and Sons Inc  2022
    Abstract
    MicroRNAs (miRNAs) as therapeutic agents have attracted increasing interest in the past decade owing to their significant effectiveness in treating a wide array of ailments. These polymerases II-derived noncoding RNAs act through post-transcriptional controlling of different proteins and their allied pathways. Like other areas of medicine, researchers have utilized miRNAs for managing acute and chronic wounds. The increase in the number of patients suffering from either under-healing or over-healing wound demonstrates the limited efficacy of the current wound healing strategies and dictates the demands for simpler approaches with greater efficacy. Various miRNA can be designed to induce... 

    https://www.sciencedirect.com/science/article/abs/pii/S0032386122006103

    , Article Polymer ; Volume 255 , 2022 ; 00323861 (ISSN) Mohammadi, A ; Shojaei, A ; Salkhi Khasraghi, S ; Karimzad Ghavidel, A ; Sharif University of Technology
    Elsevier Ltd  2022
    Abstract
    Present work illustrated that the performance of ultrafine silica (Si) particles was improved considerably by rational hybridization with nanodiamond (ND). For this, Si@ND hybrid particles synthesized by chemical hybridization were incorporated into styrene-butadiene rubber (SBR) up to 10 phr. Scanning electron microscopy revealed coarse flower-like clusters for Si@ND nanohybrids, while Si exhibited rigid agglomerates in SBR. Comparing with physical hybrid (Si&ND) and single Si particles, it was revealed that chemical hybrids synergistically improved tensile properties, like 100% and 135% improvements in tensile strength and elongation at break, respectively. Dynamic mechanical analysis of... 

    family language policy in the city of zanjan: a city for the forlorn azerbaijani

    , Article International Journal of Multilingualism ; Volume 18, Issue 1 , 2021 , Pages 1-23 ; 14790718 (ISSN) Mirvahedi, S. H ; Jafari, R ; Sharif University of Technology
    Routledge  2021
    Abstract
    The study explores language maintenance and shift patterns from a family language policy perspective in Azerbaijani-Farsi bilingual families in the City of Zanjan, Iran. The city is the capital of Zanjan province which is surrounded by Azerbaijani, Kurdish, and Farsi speaking provinces giving it a specific demographic make-up to explore language maintenance and shift processes from a family language policy perspective. Thirteen parents (six fathers and seven mothers) from upper, middle, and lower socioeconomic statuses were interviewed about their language ideologies, practices, and management with respect to the maintenance of their ethnic language, Azerbaijani, and the official language of... 

    Zygomatic bone registration based on a modified student's mixture model method

    , Article 26th National and 4th International Iranian Conference on Biomedical Engineering, ICBME 2019, 27 November 2019 through 28 November 2019 ; 2019 , Pages 88-92 ; 9781728156637 (ISBN) Noori, S. M. R ; Mobaraki, M ; Ahmadian, A ; Bayat, M ; Bahrami, N ; Sharif University of Technology
    Institute of Electrical and Electronics Engineers Inc  2019
    Abstract
    Point Set Registration (PSR) of anatomic parts is used in different fields such as Patient Specific Implant (PSI) design in Computer Assisted Surgery (CAS) procedure. We designed a modified rigid PSR method based on student's-t mixture model. The proposed method is compared with Coherent Point Drift (CPD) registration method. Higher convergence speed and the lower error value are the advantages of the suggested algorithm in compare with CPD. In our method, the number of iterations decreases by about 69%, and the final error improvement was about 7% in comparison with CPD. The robustness of the proposed algorithm makes it beneficial to be used in the procedure of designing PSI in both... 

    ZnO-incorporated polyvinylidene fluoride/poly(ε-caprolactone) nanocomposite scaffold with controlled release of dexamethasone for bone tissue engineering

    , Article Applied Physics A: Materials Science and Processing ; Volume 128, Issue 8 , 2022 ; 09478396 (ISSN) FotouhiArdakani, F ; Mohammadi, M ; Mashayekhan, S ; Sharif University of Technology
    Springer Science and Business Media Deutschland GmbH  2022
    Abstract
    Here we report on the development of a hybrid nanofibrous scaffold made from polyvinylidene fluoride (PVDF) nanofibers embedding zinc oxide nanorods (ZnOns), and poly(ε-caprolactone) (PCL) nanofibers incorporating dexamethasone (DEX)-loaded chitosan nanoparticles using dual-electrospinning method. Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), scanning electron microscopy (SEM), and tensile analysis were carried out for physiochemical characterization of the scaffolds, followed by DEX release profile. In addition, an MTT assay was conducted to assess the viability of mouse bone marrow-derived mesenchymal stem cells (mBMSCs) on the hybrid nanofibrous scaffold.... 

    ZnO-PEDOT core-shell nanowires: An ultrafast, high contrast and transparent electrochromic display

    , Article Solar Energy Materials and Solar Cells ; Volume 145 , 2016 , Pages 200-205 ; 09270248 (ISSN) Kateb, M ; Safarian, S ; Kolahdouz, M ; Fathipour, M ; Ahamdi, V ; Sharif University of Technology
    Elsevier  2016
    Abstract
    We report fabrication of ultrafast and high contrast transparent electrochromic device desired for display application using nanostructured electrode. To this end, poly (3,4-ethylenedioxythiophene) (PEDOT) nanotubes were synthesized by simple electrochemical polymerization method on hydrothermally grown ZnO nanowires array as electrode. The PEDOT nanotubes of 20 nm average wall thickness characterized by SEM, TEM and EDS. The manufactured cell was subjected to electrochemical test and spectrophotometery that showed high contrast of 54% during ultrafast switching time of <2.2 ms. In addition, high coloration efficiency of 234 cm2/C, ultrahigh diffusion coefficient of 2.01×10-4 cm2/s and... 

    ZnO quantum dots-graphene composites: Formation mechanism and enhanced photocatalytic activity for degradation of methyl orange dye

    , Article Journal of Alloys and Compounds ; Volume 663 , 2016 , Pages 738-749 ; 09258388 (ISSN) Tayyebi, A ; Outokesh, M ; Tayebi, M ; Shafikhani, A ; Şengör, S. S ; Sharif University of Technology
    Elsevier Ltd  2016
    Abstract
    The current study demonstrates homogenous decorating of zinc oxide quantum dots (QDs) onto graphene oxide (GO) surface via simple chemical method. The AFM image exhibited that the prepared graphene was 0.8 nm thick and hence practically monolayer. Average size of the ZnO QDs was estimated by transmission electron microscopy around 3 nm. Instrumental and chemical analyses demonstrated formation of a strong bond between ZnO QDs and GO, through C-O-Zn and C-Zn bridges. The UV-visible spectra displayed that the introduction of graphene sheets to ZnO QDs resulted in higher absorption intensity of UV as well as widening of adsorption window toward visible light for ZnO-Graphene due to chemical... 

    ZnO nanoparticle/nanorod-based label-free electrochemical immunoassay for rapid detection of MMP-9 biomarker

    , Article Biochemical Engineering Journal ; Volume 164 , 2020 Shabani, E ; Abdekhodaie, M. J ; Mousavi, S. A ; Taghipour, F ; Sharif University of Technology
    Elsevier B.V  2020
    Abstract
    A label-free electrochemical biosensor was developed for the rapid detection of the matrix metalloproteinase 9 (MMP-9) biomarker on the basis of antibody immobilizing on the zinc oxide (ZnO) nanoparticle and ZnO nanorod electrodes. The charge transfer resistance (Rct) of the electrodes was used as the indicator for MMP-9 concentration, which was obtained through cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS). The ZnO nanorod-based biosensor exhibited linear behavior in the MMP-9 concentration range of 1–1000 ng/ml, which is a wider range than the available concentration ranges for most of the conventional methods. The biosensor sensitivity was 32.5 μA/(decade × cm2)... 

    ZnFe2O4 nanoparticles as radiosensitizers in radiotherapy of human prostate cancer cells

    , Article Materials Science and Engineering C ; Volume 46 , January , 2015 , Pages 394-399 ; 09284931 (ISSN) Meidanchi, A ; Akhavan, O ; Khoei, S ; Shokri, A. A ; Hajikarimi, Z ; Khansari, N ; Sharif University of Technology
    Elsevier Ltd  2015
    Abstract
    Nanoparticles of high-Z elements exhibit stronger photoelectric effects than soft tissues under gamma irradiation. Hence, they can be used as effective radiosensitizers for increasing the efficiency of current radiotherapy. In this work, superparamagnetic zinc ferrite spinel (ZnFe2O4) nanoparticles were synthesized by a hydrothermal reaction method and used as radiosensitizers in cancer therapy. The magnetic nanoparticles showed fast separation from solutions (e.g., ~ 1 min for 2 mg mL- 1 of the nanoparticles in ethanol) by applying an external magnetic field (~ 1 T). The ZnFe2O4 nanoparticles were applied in an in vitro radiotherapy of lymph node carcinoma of prostate cells (as high... 

    Zinc-doped silica/polyaniline core/shell nanoparticles towards corrosion protection epoxy nanocomposite coatings

    , Article Composites Part B: Engineering ; Volume 212 , 2021 ; 13598368 (ISSN) Haddadi, S. A ; Mehmandar, E ; Jabari, H ; Ramazani Saadatabadi, A ; Mohammadkhani, R ; Yan, N ; Arjmand, M ; Sharif University of Technology
    Elsevier Ltd  2021
    Abstract
    Commercial paints and coatings can serve as a protective barrier for metallic substrates in a corrosive environment. A considerable variety of nanostructures can be embedded in a polymeric coating to achieve both barrier and active protection. This research aims to elucidate the role of polyaniline (PANI) as an active polyelectrolyte modifier for the surface modification of mesoporous silica nanoparticles (MSNs) doped with zinc cations (Zn2+). To characterize the samples, we employed different techniques, including field-emission scanning electron microscopy (FE-SEM), transmission electron microscopy (TEM), N2 adsorption-desorption, Fourier transform infrared spectroscopy (FTIR), Raman... 

    Zinc oxide as a useful and recyclable catalyst for the one-pot synthesis of 2,4,6-trisubstituted-1,3,5-trioxanes under solvent-free conditions

    , Article Industrial and Engineering Chemistry Research ; Volume 52, Issue 28 , 2013 , Pages 9538-9543 ; 08885885 (ISSN) Tayebee, R ; Nasr, A. H ; Rabiee, S ; Adibi, E ; Sharif University of Technology
    2013
    Abstract
    Different aliphatic and aromatic aldehydes such as isobutyraldehyde, ethanal, n-propanal, n-butanal, n-hexanal, n-octanal, and substituted benzaldehydes were cyclotrimerized into their corresponding 2,4,6-trialkyl-1,3, 5-trioxanes in the presence of commercial bulk zinc oxide at room temperature under neat conditions within a short span of time with high yield and excellent selectivity. Liquid products were formed as a separate phase and were decanted easily, whereas solid products were isolated by simple extraction. Effect of different additives, mol % of catalyst, kind of substrate, and reaction temperature were examined on the progress of cyclotrimerization reaction