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    On the Adequacy of the Experimental Approach to Construct Validation:
    The Case of Advertising Literacy

    , M.Sc. Thesis Sharif University of Technology Farhang, Afsaneh (Author) ; Salehi, Mohammad (Supervisor)
    Given the significance of providing any logical and empirical pieces of evidence to “support the assentation that a test measures the construct as defined and nothing else” (Ary et al., 2013, p. 248), numerous studies have been conducted to investigate construct validity, adopting various approaches. However, there are few studies employing the experimental approach to validation. The current study is aimed at obtaining statistically persuading evidence to answer the question regarding the adequacy of the experimental approach to construct validation, drawing upon the concept of advertising literacy as the construct of the researcher’s concern. To meet this end, the researcher, having... 

    Cultural identity among Iranian English language teachers

    , Article International Journal of Society, Culture and Language ; Volume 7, Issue 1 , 2019 , Pages 67-82 ; 23292210 (ISSN) Rezaei, S ; Bahrami, A ; Sharif University of Technology
    Lulu Press Inc  2019
    This survey investigated the cultural identity of Iranian English language teachers. Accordingly, a cultural identity model was proposed a priori, based on which a questionnaire was developed and piloted on 50 Iranian English language teachers (α = 0.87). The developed questionnaire was then administered to 636 male and female Iranian English language teachers. The results of confirmatory factor analysis showed that the model was fit and eight components namely 1) religious beliefs, 2) history, 3) customs, 4) manners and behaviors, 5) Persian language, 6) literature and art, 7) parents’ influence and 8) family relations were confirmed to form the core of Iranian cultural identity. The... 

    A Novel Density-Based Cluster Validity Index in Data Mining

    , M.Sc. Thesis Sharif University of Technology Rahmani, Sajjad (Author) ; Akhavan Niaki, Taghi (Supervisor)
    Ⅾue to the absenⅽe of the ⅼabeⅼs or so−ⅽaⅼⅼeⅾ target variabⅼe، ⅽⅼustering vaⅼiⅾation، ⅾespite ⅽⅼassifiⅽation, is not that straightforward. So، the ⅽⅼuster evaⅼuation is a ⅽhaⅼⅼenging task both in researⅽh projeⅽts anⅾ appⅼiⅽations. Whiⅼe ⅿany ⅽⅼustering vaⅼiⅾity inⅾiⅽes are aⅾⅾresseⅾ in the ⅼiterature, ⅿost of theⅿ, even those wiⅾeⅼy useⅾ in the appⅼiⅽation, ⅽannot hanⅾⅼe arbitrary shapes. In this paper, a noveⅼ ⅽⅼustering vaⅼiⅾity inⅾex is proposeⅾ, whiⅽh is ⅿuⅽh ⅿore powerfuⅼ in ⅽapturing the ⅾata’s reaⅼ struⅽture anⅾ ⅾeaⅼing with arbitrary shapes. An aⅼⅿost noveⅼ separation ⅿeasure is proposeⅾ to represent the signifiⅽant or insignifiⅽant separation regarⅾing the ⅽⅼuster’s struⅽture... 

    An Investigation of the Reliability and Validity of Peer-, Self-, and Teacher Assessment in EFL Learners’ Written and Oral Production

    , M.Sc. Thesis Sharif University of Technology Sayyar Masoule, Zahra (Author) ; Salehi, Mohammad (Supervisor) ; Abbasian, Gholam Reza (Co-Advisor)
    Traditional assumptions about assessment and learning have been challenged in higher education. Alternative types of assessment have been introduced to align to the students’ learning aims. Although, the growing body of literature of alternative types of assessment such as peer-assessment and self-assessment shed light on the advantages and benefits of embedding assessment in classroom activities, there is not absolute agreement on the consistency and accuracy of these types of assessment. To this aim, this study attempted to investigate the reliability and validity of self-assessment and peer-assessment of Iranian EFL learners’ written and oral production. The data was obtained from 32... 

    Method development for simultaneous determination of active ingredients in cough and cold pharmaceuticals by high performance liquid chromatography

    , Article Heliyon ; Volume 5, Issue 12 , 2019 ; 24058440 (ISSN) Nezhadali, A ; Shapouri, M. R ; Amoli Diva, M ; Hooshangi, A. H ; Khodayari, F
    Elsevier Ltd  2019
    A rapid, simple and efficient liquid chromatographic method was developed for simultaneous determination of three active ingredients namely, chlorpheniramine maleate, phenylephrine hydrochloride and guaifenesin along with sodium benzoate preservative common cold medications (syrups) and the method was validated based on the International Conference on Harmonization (ICH) and United State Pharmacopeia (USP) guidelines. Separation of the analytes was achieved within 15 min on a nucleosil gravity phenyl column in a single run with a mobile phase consisting of methanol: buffer mixture (15:85 v/v) at room temperature, in isocratic mode with flow rate of 0.8 mL min−1. A comprehensive study on... 

    Diffusional release of a solute from a spherical reservoir into a finite external volume

    , Article Journal of Pharmaceutical Sciences ; Volume 91, Issue 8 , 2002 , Pages 1803-1809 ; 00223549 (ISSN) Abdekhodaie, M. J ; Sharif University of Technology
    John Wiley and Sons Inc  2002
    An exact solution has been obtained for the release kinetics of a solute from a spherical reservoir with the burst effect initial condition into a finite external volume. The exact solution is derived based on the time Laplace transform method. The results presented here indicate that as the external fluid volume increases, the cumulative release at any time and the releasable amount of the solute at infinite time increase. In addition, for a given external volume, as the polymeric coat thickness increases the fractional release at any time decreases, Experimentally, cumulative release profiles of theophylline microspheres coated with ethylene vinyl acetate copolymer into different external... 

    Differential Item Functioning (DIF)in Terms of Gender in a High Stakes Test

    , M.Sc. Thesis Sharif University of Technology Tayebi, Alireza (Author) ; Salehi, Mohammad (Supervisor)
    Validation is an important enterprise especially when the test to be validated is a high-stakes one the results of which bring about life-changing implications for the candidates (Roever, 2001). Messick’s (1988) notion of construct irrelevant factors is pertinent in test validation. Demographic variables like gender, field of study and age can affect test results and interpretations. A fair test needs to be neutral when it comes to construct irrelevant factors such as gender. Differential Item Functioning is a way of making sure that the test does not favor one group of test takers over the others. The current study investigated differential item functioning (DIF) in terms of gender in the... 

    Field Scale Characterization of Geological Formations Using Percolation Theory

    , Article Transport in Porous Media ; Vol. 92, issue. 2 , March , 2012 , p. 357-372 ; ISSN: 1693913 Sadeghnejad, S ; Masihi, M ; Shojaei, A ; Pishvaie, M ; King, P. R ; Sharif University of Technology
    The connectivity of high conductivity pathways in geological formations depend on the spatial distribution of geological heterogeneities that may appear on various length scales. Appropriate modeling of this is crucial within in hydrology and petroleum systems. The approach taken in this study is to use percolation theory to quantify the connectivity, hydraulic conductivity, and breakthrough time behavior between an injector and a producer within such systems. In particular, a three-dimensional overlapping sandbody model is considered which assumes that the geological formation can be split into either conductive flow units (i. e., good sands) or non-conductive units (i. e., poor sands). The... 

    Hippocampal shape analysis in epilepsy using Laplace-Beltrami spectrum

    , Article 2011 19th Iranian Conference on Electrical Engineering, ICEE 2011, 17 May 2011 through 19 May 2011 ; May , 2011 , Page(s): 1 - 5 ; ISSN : 21647054 ; 9789644634284 (ISBN) Shishegar, R ; Soltanian Zadeh, H ; Moghadasi, S. R ; Sharif University of Technology
    Shape analysis plays an important role in many medical imaging studies. One of the recent shape analysis methods uses the Laplace Beltrami eigenvalues which is also used in this paper for global shape comparison of hippocampus of normal subjects and epileptic patients. Popularity of the Laplace Beltrami operator in this field is due to its isometry-invariance which avoids pre-processing steps like mapping, registration, and alignment. In addition, it is capable of revealing fine details in shapes that makes this method a good choice for deformation detecting purposes like epilepsy diagnosis. To examine capability of the proposed method, statistical analysis and two ways of classification,... 

    A robust and efficient SIP authentication scheme

    , Article Scientia Iranica ; Volume 17, Issue 1 D , June , 2010 , Pages 25-38 ; 10263098 (ISSN) Mohammadi Nodooshan, A ; Darmani, Y ; Jalili, R ; Nourani, M ; Sayad Haghighi, M ; Sharif University of Technology
    The Session Initiation Protocol (SIP), which is becoming the de facto standard for the next-generation VoIP networks, is currently receiving much attention in many aspects. One aspect that was not deeply addressed in the original SIP is its authentication procedure. Apart from its security, an SIP authentication procedure should be efficient. This paper proposes a robust and efficient three-party SIP authentication protocol. In this protocol, the. end users are. authenticated with the proxy server in their domain using the. registrar server. Compared to previous works, our proposed protocol is more efficient and secure. To support our protocol with a formal security proof, its model is... 

    Experimental validation of a novel radiation based model for spacecraft attitude estimation

    , Article Sensors and Actuators, A: Physical ; Volume 250 , 2016 , Pages 114-122 ; 09244247 (ISSN) Labibian, A ; Pourtakdoust, S. H ; Kiani, M ; Sheikhi, A. A ; Alikhani, A ; Sharif University of Technology
    Attitude Determination (AD) is one of the key requirements of many current and emerging remote sensing missions. As such AD has been traditionally accomplished through a variety of algorithms and measurement models pertinent to sensing mechanisms. The current paper addresses conceptual validation and utility of a novel radiation based heat (measurement) model for space application. The proposed new Heat Attitude (HA) model utilizes temperature data to relate the Satellite Surfaces’ (SS) Net Heat Flux (NHF) to attitude assuming that the satellite navigational data are available. As Sun and the Earth are considered the main external sources of radiation, their effects are modeled for the SS... 

    Spacecraft Attitude Estimation Via Nonlinear Filtering Using Thermal Sensors

    , Ph.D. Dissertation Sharif University of Technology Labibian, Amir (Author) ; Pourtakdoust, Hossein (Supervisor) ; Alikhani, Alireza (Supervisor)
    The problem of spacecraft attitude determination (AD) using thermal data is investigated. Given the Solar space environment, the key dominant mechanism of heat transfer will be radiation, in which the Sun and Earth are the major contributing heat sources that affect the satellite external surface temperatures. In this sense, the net heat fluxes (NHF) of a satellite surface that is insulated against any internal heat communication will only be related to these main radiating sources. In order to utilize the satellite temperature data for AD, a heat attitude model (HAM) that relates the satellite surfaces NHF to its attitude is developed using three orthogonal satellite surfaces. Assuming... 

    Preliminary Analysis of a Thermo Acoustic Heat Pump (THP) In Lab Scale

    , M.Sc. Thesis Sharif University of Technology Khatib, Abolfazl (Author) ; Ghorbanian, Kaveh (Supervisor)
    thermoacuostic heat pump (THP) is One of the most important thermoacuostic applications which is used for heat lost recovery in industrial applications and civil applications.In this project, we have a quick review on thermoacuostic theory and researches in this field. Also a thermoacuostic heat pump in a lab scale will be designed and analyzed.For achieving this goal, first, mathematical equations of thermoacuostic systems are reviewed; a thermoacuostic heat pump is designed on the base of Tijani method and final model is validated by DeltaEC software. In the next step, after investigating about laboratory equipments which is used in testing process, we generate test matrix and study about... 

    On the Reliability and Validity of Grammaticality Judgment Tests

    , M.Sc. Thesis Sharif University of Technology Bagheri Sanjareh, Hemaseh (Author) ; Salehi, Mohammad (Supervisor)
    The present research aims to examine the influence of response format on the reliability and validity of grammaticality judgment tests, which will also reveal some facts about the superiority of each format. To this end, the grammaticality judgment (GJ) test developed by Gass (1994) was selected as the instrument of the study, which was manipulated in terms of the response format while the original items remained intact. Thus, in the first phase of the study, a multiple-choice GJ test (MCGJT) was constructed to be compared with the traditional form, i.e., the dichotomous type (DGJT). In an interval of a month, the two tests were administered to a group of 110 engineering-major BS students at... 

    Construction and Validation of an Analytic Rubric for Human Translation Quality Assessment: A Mixed Methods Study

    , M.Sc. Thesis Sharif University of Technology Jafari, Rasoul (Author) ; Salehi, Mohammad (Supervisor)
    Translation quality assessment (TQA) as a systematic field of inquiry has been under scholarly investigation over the past decades. In spite of the challenges appeared in the path to success, theoretical and practical developments have already been made in translation studies. One of the unsettled and challenging problems concerning translation assessment, yet, is the subjectivity that is inherent in the process of scoring test-takers’ translation performances. In the absence of any granular objective criteria which includes all the subcomponents of translation as a multi-layer rather than unitary construct, the raters inevitably bring their intuition and will to the act of measurement.... 

    Estimating the connected volume of hydrocarbon during early reservoir life by percolation theory

    , Article Energy Sources, Part A: Recovery, Utilization and Environmental Effects ; Vol. 36, issue. 3 , Nov , 2014 , p. 301-308 ; ISSN: 15567036 Sadeghnejad, S ; Masihi, M ; Pishvaie, M ; Shojaei, A ; King, P. R ; Sharif University of Technology
    The petroleum industry tends to paint an optimistic picture with respect to future petroleum availability. In order to anticipate demand, the size of connected volume of hydrocarbon of fields needs to be known. During the early stage of life of a reservoir, due to the lake of certain data, connected volume of hydrocarbon is usually based on analogues or rules of thumb and not detailed reservoir modeling. Therefore, there is a great incentive to produce physically-based methodologies to make an estimation of connected volume of hydrocarbon. Percolation theory is used to estimate the connected volume of hydrocarbon very fast. Furthermore, the result has been validated against areal field... 

    Validation of the Saadat NIBP module according to the ANSI/AAMI-SP10 protocol

    , Article 2013 20th Iranian Conference on Biomedical Engineering, ICBME 2013 ; Deembec , 2013 , Pages 199-202 Sadaghiani, M ; Mashayekhi, G ; Behzadfar, N ; Yaghoobzadeh, A ; Babaee, T ; Sharif University of Technology
    IEEE Computer Society  2013
    This study is conducted with the aim of validating the Saadat non-invasive blood pressure (NIBP) module accuracy and reliability against direct intra arterial pressure measurement (IBP) according to the ANSI/AAMI SP10-2002 guidelines. Measurement and comparison procedure were done in a static population of 19 adult patients with brachial catheterized arterial line with total measurements of 195 under supervision of a highly experienced cardiovascular anesthesiologist in accordance with the ANSI/AAMI SP10-2002 regulation. Data analysis was performed based on the protocol criteria. In order to represent relationships between the test device and the reference method, Bland-Altman graphical... 

    Presenting an approach for conducting knowledge architecture within large-scale organizations

    , Article PLoS ONE ; Volume 10, Issue 5 , May , 2015 ; 19326203 (ISSN) Varaee, T ; Habibi, J ; Mohaghar, A ; Sharif University of Technology
    Public Library of Science  2015
    Knowledge architecture (KA) establishes the basic groundwork for the successful implementation of a short-term or long-term knowledge management (KM) program. An example of KA is the design of a prototype before a new vehicle is manufactured. Due to a transformation to large-scale organizations, the traditional architecture of organizations is undergoing fundamental changes. This paper explores the main strengths and weaknesses in the field of KA within large-scale organizations and provides a suitable methodology and supervising framework to overcome specific limitations. This objective was achieved by applying and updating the concepts from the Zachman information architectural framework... 

    Reliability and validity of the Foot and Ankle Outcome Score: A validation study from Iran

    , Article Clinical Rheumatology ; Volume 29, Issue 5 , 2010 , Pages 479-486 ; 07703198 (ISSN) Negahban, H ; Mazaheri, M ; Salavati, M ; Sohani, S. M ; Askari, M ; Fanian, H ; Parnianpour, M ; Sharif University of Technology
    The aims of this study were to culturally adapt and validate the Persian version of Foot and Ankle Outcome Score (FAOS) and present data on its psychometric properties for patients with different foot and ankle problems. The Persian version of FAOS was developed after a standard forward-backward translation and cultural adaptation process. The sample included 93 patients with foot and ankle disorders who were asked to complete two questionnaires: FAOS and Short-Form 36 Health Survey (SF-36). To determine test-retest reliability, 60 randomly chosen patients completed the FAOS again 2 to 6 days after the first administration. Test-retest reliability and internal consistency were assessed using... 

    Cultural adaptation and validation of the persian version of the arthritis impact measurement scales 2-short form in patients with osteoarthritis of the knee

    , Article Disability and Rehabilitation ; Volume 31, Issue 25 , 2009 , Pages 2081-2087 ; 09638288 (ISSN) Askary Ashtiani, A. R ; Mousavi, J ; Montazeri, A ; Shamsollahi, S ; Parnianpour, M ; Sharif University of Technology
    Purpose.To translate and validate the Persian version of the Arthritis Measurement Scales 2-Short Form (AIMS2-SF) in patients with osteoarthritis (OA) of the knee. Method.The translation and cultural adaptation of the original questionnaire was carried out in accordance with published guidelines. One hundred and fourteen consecutive Persian-speaking patients with OA of the knee were participated in this study. The Short Form Health Survey (SF-36) and visual analogue scales (VAS) for pain and joint stiffness were used to test convergent validity of the Persian AIMS2-SF. In addition, 35 randomly selected patients were asked to complete the questionnaire 3 days later for the second time....