2,062 research outputs found

    Toward automated earned value tracking using 3D imaging tools

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    PERCEPTIONS OF THE "LANGUAGE" CONCEPT OF TURKISH TEACHER CANDIDATES: A SAMPLE ANALYSIS OF METAPHORS

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    In this study, it is aimed to determine the opinions of Turkish teacher candidates on the concept of "language". The study group of the study; in the academic year of 2018-2019, a total of 190 teacher candidates studying at Fırat University Turkish Language Teaching Department are formed. In the study designed with qualitative research design, open-ended question form was used as data collection tool. The Turkish teacher candidates were asked to complete the expression using the metaphors "It looks like / language ... because ..." The obtained data were analyzed by the content analysis method and 167 valid metaphors were obtained for the concept of "language". Metaphores were collected under eight conceptual category and analyzed. As a result of the research, it was determined that prospective teachers developed many language metaphors. "Mirror (6.58%)", "bridge (5.38%)", "infant (5.38%)", "water (4.19%)", "sun (4.19%)" "tree (3.59%)" metaphors have been identified.  Article visualizations

    The effect of microwaves on ion exchange in zeolites

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    Thesis (Doctoral)--Izmir Institute of Technology, Chemical Engineering, Izmir, 2009Includes bibliographical references (leaves: 135-143)Text in English; Abstract: Turkish and Englishxvi, 220 leavesRecent innovations of microwave field lead many scientists to focus on this phenomenon and it has been begun to be applied in different fields of zeolite applications. The purpose of this study is to determine the effect of microwave irradiation on ion exchange degree and on the structure of natural zeolite. The clinoptilolite rich mineral from Western Anatolia was used throughout the experiments. The ion exchange experiments were performed using AgNO3, Co.(NO3)26H2O and Cu (NO3)25/2H2O within 0.01M - 1M and 40 oC - 80 oC concentration and temperature range in conventional waterbath and microwave. Different solid and solution conditions on ion exchange degree were determined, as well. Metal exchanged minerals were characterized by using instrumental techniques. Antibacterial activity of the Agexchanged clinoptilolite against E. coli was determined by Kirby.Bauer method. The Ag +, Co2+ and Cu2+ amounts within the mineral increased with decreasing S/L while increased with increasing temperature and time. For some utilized parameters microwave treatment was effective however on the whole it did not significantly improved the degree of ion exchange compared to waterbath treatment. The inspection of XRD patterns and FTIR spectra of metal exchanged minerals confirmed that no transition of clinoptilolite phase and no shifts in peak positions occurred with exchange methods applied. The sorption processes are controlled mainly by external-phase mass transfer. Ag+, Co2+ and Cu2+ sorptions on NaCLI exhibited a good fit to Freundlich model and Langmuir models. All metal exchanged minerals showed considerable superiority against E.Coli

    Tracking of secondary and temporary objects in structural concrete work

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    Previous research has shown that “Scan-vs-BIM ” object recognition systems, that fuse 3D point clouds from Terrestrial Laser Scanning (TLS) or digital photogrammetry with 4D project BIM, provide valuable information for tracking structural works. However, until now, the potential of these systems has been demonstrated for tracking progress of permanent structures only; no work has been reported yet on tracking secondary or temporary structures. For structural concrete work, temporary structures include formwork, scaffolding and shoring, while secondary components include rebar. Together, they constitute most of the earned value in concrete work. The impact of tracking such elements would thus be added veracity and detail to earned value calculations, and subsequently better project control and performance. This paper presents three different techniques for recognizing concrete construction secondary and temporary objects in TLS point clouds. Two of the techniques are tested using real-life data collected from a reinforced concrete building construction site. The preliminary experimental results show that it is feasible to recognize secondary and temporary objects in TLS point clouds with good accuracy; but it is envisaged that superior results could be achieved by using additional cues such colour and 3D edge information
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