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Education and Information Technologies - The purpose of the current research was to develop an electronic performance support system (EPSS) for quantitative data analysis by using design-based... 相似文献
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The Constructivist Learning Environment Survey is an instrument used for assessing students’ and teachers’ perceptions of their learning environments. The Teacher Constructivist Learning Environment Survey (TCLES) was created to better enable teachers and researchers to determine teachers’ perception of their use of constructivist approaches in their classrooms. This article reports the development and validation of a modified Turkish version of the TCLES with 449 teachers chosen randomly from primary schools in Turkey. The validity of the TCLES was investigated by means of explanatory and the confirmatory factor analyses, whereas the Cronbach alpha coefficient was used to assess the internal consistency of the scales. The factor analyses were carried out to check the factor structure of the Turkish adaptation of TCLES. The factor analysis revealed that the Turkish adaptation of the original survey consisted of 30 items with the same six-scale structure as the original survey. 相似文献
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We demonstrate an evaporation-based microfluidic strategy to produce oil-free cell containing hydrogel particles. Perfluoro-n-pentane, which is used as the continuous oil phase to generate cell-containing hydrogel (Extracel) particles, is removed at an elevated temperature. Human colon cancer cells (HCT116) encapsulated in the hydrogel particles show higher viability than cells encapsulated in particles that are produced via a non-evaporative oil phase. In addition, single HCT116 cells can be cultured for a week in such particles and respond to inflammatory stimuli, highlighting the potential applications of the developed strategy for 3D cell culture, drug testing, and cell-based drug delivery. 相似文献
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Evren Bay Sengul Sarah C. Emery Cheryl Torok Fleming Lacy Hartman Cara B. Stone 《Public Library Quarterly》2013,32(4):352-362
This research compares the fifty top-rated movies for 2000–2009 recommended by the Internet Movie Database (IMDb) with the holdings of ten medium-sized public libraries. The study shows that there was no relation between a movie's rank in the IMDb listing and the number of copies held. Relationships appeared between number of library holdings and country of production (U.S. productions favored), genre (family, sci-fi, animation, adventure favored), and Motion Picture Association of America (MPAA) rating (G, PG, PG-13 preferred). Library holdings seem to reflect preferences of IMDb raters aged 30 and older, not popular movie tastes. 相似文献
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Betul Apaydin Yildirim Saban Kordali Kubra Asena Terim Kapakin Fatih Yildirim Esra Aktas Senocak Serdar Altun 《Journal of Zhejiang University. Science. B》2017,18(6):501-511
The aim of this study was to evaluate the possible therapeutic or protective effects of Helichrysum plicatum DC. subsp. plicatum ethanol extract (HPE) against gentamicin-induced nephrotoxicity. Thirty-six Sprague Dawley male rats weighing between 200 and 250 g were used as live material. They were formed into six groups containing 6 rats each and were allowed to adapt to laboratory conditions for 7 d. Group I: control, 5% DMSO intraperitoneal (i.p.); Group II: HPE 100 mg/(kg·d) i.p.; Group III: HPE 200 mg/(kg·d) i.p.; Group IV: gentamicin as 80 mg/(kg·d) i.p.; Group V: gentamicin as 80 mg/(kg·d) i.p.+HPE 100 mg/(kg·d) i.p.; and Group VI: gentamicin as 80 mg/(kg·d) i.p.+HPE 200 mg/(kg·d) i.p. for 8 d. Following treatment, serum, liver, and kidney tissues were used to assess blood urea nitrogen (BUN), creatinine, enzymatic and non-enzymatic antioxidants, and lipid peroxidation. Gentamicin significantly increased serum BUN, creatinin, and liver and kidney levels of malondialdehyde (MDA). It also decreased the activity of catalase (CAT), glutathione peroxidase (GPx), and superoxide dismutase (SOD). Treatment with the HPE 100 mg/kg reversed gentamicin-induced alterations as evidenced by decreased serum BUN and creatinin, liver and kidney oxidant marker, and tubular necrosis as well as by an increase in antioxidant enzymes. It was found that HPE 200 mg/kg significantly increased liver and kidney tissue MDA levels in nephrotoxicity in rats. As a result, these findings support the proposition that HPE in 100 mg/kg dose demonstrates in the kidney and liver as free radicals and scavenger to prevent the toxic effects of gentamicin in both the biochemical and histopathology parameters. 相似文献
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Gultekin Cakmakci Ozge Tosun Sebnem Turgut Sefika Orenler Kubra Sengul Gokce Top 《International Journal of Science and Mathematics Education》2011,9(3):627-655
This study aims at investigating the effects of a teaching intervention, the design of which is informed by evidence from
educational theories and research data, on students’ images of scientists. A quasi-experimental design with a non-equivalent
pre-test–post-test control group (CG) was used to compare the outcomes of the intervention. The subjects of the study were
63 grade 6 (aged 12 and 13) students who were in two different classes and taught by two different teachers. The study was
undertaken in ten class hours over a 4-week period, during which the topics related to matter and heat concepts were covered
as a part of the regular Turkish Science and Technology Curriculum. Before the intervention, there was no significant difference between the two classes in terms of their achievements in the
Science and Technology course (t(63) = −0.943, p > 0.05). Accordingly, one of the classes was randomly selected as the experimental group (EG). A modified version of the
Draw-a-Scientist Test, in conjunction with individual interviews, was used to assess students’ images of scientists at the
beginning and end of the study. The results showed that students who had followed evidence-informed instruction had significant
gains from the pre-test to the post-test regarding their images of scientists compared to students with traditional instruction.
Many students in the EG started to view scientists as realistic people rather than as extraordinary people or mythical creatures.
Nevertheless, several students in the CG held images of scientists and their work which fit a stereotype of scientists as
male, bald, bespectacled, wearing a laboratory coat, working alone in a laboratory environment and having a limited social
life. Some possible implications for teaching and further research are discussed. 相似文献
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