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31.
Pantelis M. Papadopoulos Ioannis G. Stamelos Andreas Meiszner 《Education and Information Technologies》2013,18(2):381-397
This paper presents the results after four years of running of an instructional method that utilizes free/libre open source software (FLOSS) projects as tools for teaching software engineering in formal education. In the last four academic years, a total of 408 juniors majoring in Informatics (in a 4-year program) participated in the study, assuming the roles of requirements engineers, testers, developers, and designers/analysts. Students appreciated the benefits gained by the method and identified aspects that require further improvement. In the paper, we present (a) the details of our method, (b) students’ opinions as recorded through a questionnaire including both closed and open ended questions, and (c) conclusions on how the use of FLOSS projects can be applied, and be beneficial for the students. 相似文献
32.
Emotions are an integral component of all human activities, including human–computer interactions. This article reviews literature on the theories of emotions, methods for studying emotions, and their role in human information behaviour. It also examines current research on emotions in library and information science, information retrieval and human–computer interaction, and outlines some of the challenges and directions for future work. 相似文献
33.
Ralli Asimina M. Dimakos Ioannis C. Dockrell Julie E. Papoulidi Asimenia 《Reading and writing》2022,35(7):1599-1626
Developing writing skills is a central part of the education curriculum in many countries, yet numerous children have difficulties in producing written texts. To our knowledge there is no systematic study examining the ways in which Greek teachers adapt their writing instruction strategies to accommodate the children’s needs. The aim of the present study was to identify the approaches teachers employ while teaching writing in Greek primary schools and to examine the nature and frequency of these different aspects of teaching writing. We replicated and extended the Dockrell et al. (Read Writ Interdiscip J 29(3):409–434, 2016) study, using the Not so Simple View of Writing framework. One hundred and three teachers responded to an online questionnaire, which consisted of questions regarding their academic qualifications and their specific teaching practices. The majority of the sample felt prepared and enjoyed teaching writing. However, almost all of the teachers found teaching writing challenging and half of them reported that supporting struggling writers was difficult for them. Overall, teachers reported more work at word level, occurring almost weekly, than at text level. Differences between Grade levels they taught were also evident for specific domains of writing. Recommendations for future research and implications for educational practice are discussed.
相似文献34.
Ioannis Vogiatzis Vasileios Andrianopoulos Zafeiris Louvaris Evgenia Cherouveim Stavroula Spetsioti Maroula Vasilopoulou 《Journal of sports sciences》2013,31(10):1041-1049
Abstract In this study, we wished to determine whether the observed reduction in quadriceps muscle oxygen availability, reported during repetitive bouts of isometric exercise in simulated sailing efforts (i.e. hiking), is because of restricted muscle blood flow. Six national-squad Laser sailors initially performed three successive 3-min hiking bouts followed by three successive 3-min cycling tests sustained at constant intensities reproducing the cardiac output recorded during each of the three hiking bouts. The blood flow index (BFI) was determined from assessment of the vastus lateralis using near-infrared spectroscopy in association with the light-absorbing tracer indocyanine green dye, while cardiac output was determined from impedance cardiography. At equivalent cardiac outputs (ranging from 10.3±0.5 to 14.8±0.86 L · min?1), the increase from baseline in vastus lateralis BFI across the three hiking bouts (from 1.1±0.2 to 3.1±0.6 nM · s?1) was lower (P = 0.036) than that seen during the three cycling bouts (from 1.1±0.2 to 7.2±1.4 nM · s?1) (Cohen's d: 3.80 nM · s?1), whereas the increase from baseline in deoxygenated haemoglobin (by ～17.0±2.9 μM) (an index of tissue oxygen extraction) was greater (P = 0.006) during hiking than cycling (by ～5.3±2.7 μM) (Cohen's d: 4.17 μM). The results suggest that reduced vastus lateralis muscle oxygen availability during hiking arises from restricted muscle blood flow in the isometrically acting quadriceps muscles. 相似文献
35.
Ioannis D. Kostoulas Thrasivoulos Paxinos Konstantinos Volaklis Savvas P. Tokmakidis 《European Journal of Sport Science》2018,18(3):323-331
The purpose of this study was to examine the effects of active recovery (AR) and passive recovery (PR) using short (2-min) and long (4-min) intervals on swimming performance. Twelve male competitive swimmers completed a progressively increasing speed test of 7?×?200-m swimming repetitions to locate the speed before the onset of curvilinear increase in blood lactate concentration (LT1). Subsequently, performance time of 6?×?50-m sprints was recorded during four different conditions: (i) 2-min PR (PR-2), (ii) 4-min PR (PR-4), (iii) 2-min AR (AR-2) and (iv) 4-min AR (AR-4) intervals. Blood lactate concentration was measured before the first and after the last 50-m repetition. AR was applied at an intensity corresponding to LT1. Performance as indicated by the time needed to complete 6?×?50-m sprints was impaired after AR-4 compared to PR-4 (AR-4: 28.65?±?1.04, PR-4: 28.17?±?0.72?s; mean% difference: MD% ±s; ±90% confidence limits: 90%CL, 1.71?±?3.01%; ±1.43%, p?=?.01) but was not different between AR-2 compared to PR-2 conditions (AR-2: 28.68?±?0.85, PR-2: 28.69?±?0.82 s; MD%: 0.03?±?1.61%; 90%CL?±?0.77%, p?=?.99). Performance in sprint-6 was improved after AR compared to PR independent of interval duration (AR: 28.55?±?0.81, PR: 29.01?±?1.03?s; MD%: 1.52?±?2.61%; 90%CL?±?1.2%; p?=?.03). Blood lactate concentration was lower after AR-4 compared to PR-4 but did not differ between AR-2 and PR-2 conditions. In conclusion, AR impaired performance after a 4-min but not after a 2-min interval. A better performance during sprint-6 after AR could be attributed to a faster metabolic recovery or anticipatory regulatory mechanisms towards the end of the series especially when adequate 4-min active recovery interval is applied. 相似文献
36.
Pantelis M. Papadopoulos Stavros N. Demetriadis Ioannis G. Stamelos Ioannis A. Tsoukalas 《Educational technology research and development : ETR & D》2011,59(1):71-90
This study investigates the effectiveness of two variants of a prompting strategy that guides students to focus on important
issues when learning in an ill-structured domain. Students in three groups studied individually Software Project Management
(SPM) cases for a week, using a web-based learning environment designed especially for this purpose. The first group (control)
studied the cases without any prompting. The second group (“writing mode”) studied the same cases, while prompted to provide
written answers to a set of knowledge integration prompts meant to engage students in deeper processing of the material. The
third group (“thinking mode”) studied the cases, while prompted only to think of possible answers to the same question prompts.
Results indicated that students in the writing condition group outperformed the others in both domain knowledge acquisition
and knowledge transfer post-test items. Several students in the thinking condition group skipped the question prompts, while
those that reported having reflected on the material were unable to achieve high performance comparable to the writing condition
group. Overall, the study provides evidence that the implementation of prompting techniques in technology-enhanced learning
environments may lead to improved outcomes, when combined with the requirement that students provide their answers in writing. 相似文献
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Ioannis Rabias Danai Tsitrouli Eleni Karakosta Thomas Kehagias Georgios Diamantopoulos Michael Fardis Dimosthenis Stamopoulos Thomas G. Maris Polykarpos Falaras Nikolaos Zouridakis Nikolaos Diamantis Georgios Panayotou Dimitrios A. Verganelakis Garyfalia I. Drossopoulou Effie C. Tsilibari Georgios Papavassiliou 《Biomicrofluidics》2010,4(2)
One of the most significant challenges implementing colloidal magnetic nanoparticles in medicine is the efficient heating of microliter quantities by applying a low frequency alternating magnetic field. The ultimate goal is to accomplish nonsurgically the treatment of millimeter size tumors. Here, we demonstrate the synthesis, characterization, and the in vitro as well as in vivo efficiency of a dextran coated maghemite (γ-Fe2O3) ferrofluid with an exceptional response to magnetic heating. The difference to previous synthetic attempts is the high charge of the dextran coating, which according to our study maintains the colloidal stability and good dispersion of the ferrofluid during the magnetic heating stage. Specifically, in vitro 2 μl of the ferrofluid gives an outstanding temperature rise of 33 °C within 10 min, while in vivo treatment, by infusing 150 μl of the ferrofluid in animal model (rat) glioma tumors, causes an impressive cancer tissue dissolution. 相似文献
39.
Ioannis Angelou Vasileios Katsaras Dimitris Kourkouridis Andreas Veglis 《Journalism Practice》2020,14(6):730-748
ABSTRACT News organizations increasingly focus their efforts to boost traffic on their websites to grow their share of online advertising. We investigated the relationship between news websites’ traffic ranking and their social media tools of Facebook, Twitter, YouTube and Google Plus. For a year we monitored the followers of all Greek regional newspapers in relation to the traffic on their websites. We continued monitoring for a second year to validate the robustness of the findings and we hereby present results for 86 weeks. Statistical analysis leads to the conclusion that the number of social media subscribers can predict the competitive position of a newspaper in the market based on its website traffic. The effect lasts for a limited period of time, one to three weeks, depending on the specific medium. Importantly, results indicate the potential of developing a prediction model of the website’s traffic, based on the social media metrics of the organization, as a useful tool to increase traffic and revenues from online advertising. 相似文献
40.
The present study explored typically developing children’s understanding of, and attitudes towards, the inclusion of children with physical disabilities (PD) in mainstream settings. The 60 children who participated in the study attended sixth grade in two mainstream primary schools (30 in contact with a child with PD and 30 without such contact). They filled in a questionnaire to measure understanding of disabilities and one to explore attitudes towards inclusion. Analyses revealed that children in contact with a child with PD had a better understanding of the emotional and social problems associated with the presence of PD than the comparison group. Moreover, children in contact with a child with PD expressed more positive attitudes towards the inclusion of children with PD in relation to children without such contact. Results are discussed in terms of the importance of contact in the formation of more positive attitudes towards the inclusion of children with PD. 相似文献