FLIPPED CLASSROOM IMPLEMENTATION IN SCIENCE TEACHING

Internet teknolojisinde ki hızlı gelişme ile birlikte her geçen gün yeni öğrenme ve öğretme yaklaşımları kullanılmaya başlamıştır. Bu yaklaşımlardan birisi olan ters yüz öğrenme modelinde öğretmen seçtiği kaynakları öğrencileri ile ders öncesinde paylaşmakta ve ilgili konu öğretimi bu kaynaklar ile sınıf dışında gerçekleştirilmekte; sınıf içinde ise konu pekiştirme çalışmaları etkileşimli, aktif ve işbirlikli problem çözme etkinlikleri ile sağlanmaktadır. Bu bağlamda bu çalışmanın amacı; Ters Yüz Sınıf modelinin ortaokul 8. sınıf fen bilimleri dersi Maddenin Isı ile Etkileşimi konusunda öğrencilerin akademik başarılarına etkisini ve Ters Yüz Sınıf modeliyle ilgili görüşlerini ortaya koymaktır. Araştırmanın çalışma grubunu, 2017-2018 öğretim yılında, Konya il merkezindeki bir devlet ortaokulunda öğrenim gören toplam 63 sekizinci sınıf öğrencisi oluşturmaktadır. Çalışmada, nicel ve nitel veri toplama yöntemlerinin birlikte kullanılması yoluyla, araştırma sonuçlarını bütünleştirilmesine imkân sağlayan karma yöntem kullanılmıştır. Nicel veri toplama aracı olarak alanında uzman dört fen bilgisi öğretmeni ve araştırmacı tarafından hazırlanan ‘Başarı Testi, nitel verilerin toplanmasında ise araştırmacı tarafından geliştirilen yarı yapılandırılmış görüşme formu kullanılmıştır Araştırmada son test kontrol gruplu yarı deneysel desen kullanılmıştır. Araştırma sonucunda; deney grubunun akademik başarısının kontrol grubuna göre istatistiksel olarak anlamlı ve olumlu yönde yüksek olduğu sonucuna ulaşılmıştır. Deney grubu öğrencileri; ters-yüz sınıf uygulamasıyla başarılarının arttığını, daha iyi öğrendiklerini, ders katılımlarının arttığını, mevcut programa göre ders işlenen sınıftaki konu anlatımını dinlemekten daha eğlenceli bulduklarını ifade etmiştir. Öğrenciler evlerinde internetin olmaması ya da hızının yetersiz olması, bilgisayarlarının donanımlarının yetersiz olmasından dolayı karşılaştıkları sorunları uygulamanın dezavantajları olarak ifade etmişlerdir. Anahtar Kelimeler: Ters-yüz sınıf modeli, fen öğretimi, akademik başarıAlong with the fast development in the internet technologies, every day new learning and teaching approaches are introduced and implemented. In flipped learning model, one of these approaches, sources selected by the teacher are shared with the students before the class and students study and learn the subject before the class, out of the classroom, and in the classroom, subject reinforcement exercises are made in an active manner, using collaborative problem solving activities. In this context, the aim of this research is to reveal the effect of Flipped Classroom model on the academic success of the students for the subject of Interaction of Matter with Heat of 8th grade Science course and opinions of students on the Flipped Classroom Model. Study group of the research consists of a total of 63 8th grade students, studied in a state middle school located in the central part of city of Konya during the 2017-2018 school year. In the research, mixed methods, a method that allows integration of research results via utilization of quantitative and qualitative data collection methods conjointly. As the quantitative data collection tool, the "Achievement Test" developed by a group of four, consisting of four professionalist science teachers and researchers, and as the qualitative data collection tool, "Semi-Structured Review" form, developed by the researcher have been used. In the research, a quasi-experimental design with a posttest control group has been used. As the result of the research; It was concluded that the academic achievement of the experimental group was statistically significant and positively higher than the control group. Students consisting the experimental group has expressed that with the flipped classroom application, their success and their participation to the class has improved and they found this method to be more fun than listening to the lecturing as per the current program requires. Also, the students have stated their absence of internet access at home and the problems they encounter due to hardware inadequacies of their computers are the drawbacks of the implementation. Keywords: Flipped classroom model, science teaching, academic achievement

Emotion Analysis using Different Stimuli with EEG Signals in Emotional Space

Automatic detection for human-machine interfaces of the emotional states of the people is one of the difficult tasks. EEG signals that are very difficult to control by the person are also used in emotion recognition tasks. In this study, emotion analysis and classification study were conducted by using EEG signals for different types of stimuli. The combination of the audio and video information has been shown to be more effective about the classification of positive/negative (high/low) emotion by using wavelet transform from EEG signals, and true positive rate of 81.6% was obtained in valence dimension. Information of audio was found to be more effective than the information of video at classification that is made in arousal dimension, and true positive rate of 73.7% was obtained when both stimuli of audio and audio+video are used. Four class classification performance has also been examined in the space of valence-arousal

The Electronic and Superconducting Properties of Oxygen-Ordered MgB2 compounds of the form Mg2B3Ox

Possible candidates for the Mg2B3Ox nanostructures observed in bulk of polycrystalline MgB2 (Ref.1) have been studied using a combination of Z-contrast imaging, electron energy loss spectroscopy (EELS) and first-principles calculations. The electronic structures, phonon modes, and electron phonon coupling parameters are calculated for two oxygen-ordered MgB2 compounds of composition Mg2B3O and Mg2B3O2, and compared with those of MgB2. We find that the density of states for both Mg2B3Ox structures show very good agreement with EELS, indicating that they are excellent candidates to explain the observed coherent oxygen precipitates. Incorporation of oxygen reduces the transition temperature and gives calculated TC values of 18.3 K and 1.6 K for Mg2B3O and Mg2B3O2, respectively.Comment: Submitted to PR

Lactation curve and persistency of Anatolian buffaloes

WOS: 000360812300003The aim of this study was to determine the lactation curve traits of Anatolian buffaloes raised under different conditions in farms in Tokat Province, Turkey. Wood's gamma curve parameters were employed to identify the lactation curve types, and values for the parameters beginning yield (a), coefficient of rising (b) and coefficient of decreasing (c) were used to determine the shape and type of lactation curve. All parameters in typical lactation curves were positive, and in the event of one parameter being negative, the curve was considered to be an atypical lactation curve. A total of 690 lactation curves were investigated. It was determined that 406 (58.84%) of these curves were typical, while 90 (13.04%) were concave and 194 (28.12%) of a decreasing type. For typical lactation curves, a, b, c, persistency (S), time after parturition until the peak yield occurs (T-max), maximum daily peak yield (Y-max), and coefficient of determination (R-2) were 7.14 +/- 0.008, 0.85 +/- 2.1, 0.40 +/- 0.001, 2.68, 63.6, 6.41 and 76.33, respectively. For concave lactation curves, values for a, b, c, T-max, Y-max and R-2 were 4.94 +/- 0.42, -0.73 +/- 0.016, -0.23 +/- 0.0038, 95.40, 7.41 +/- 0.004 and 71.68, respectively. For decreasing typical lactation curves, values for a, b, c, T-max, and R-2 were 5.31 +/- 0.0041, -0.15 +/- 0.007, 0.039 +/- 0.0023, 3.89 +/- 0.11 and 79.94, respectively. Parameters predicted by the Wood model within the scope of this study have the potential of being useful for breeding programmes. Further breeding/selection activities could be conducted by using the female Anatolian buffaloes with typical lactation curves

HF spectrum occupancy and antennas

This paper deals with the research made during the COST 296 action in the WG2, WP 2.3 in the antennas and HF spectrum management fields, focusing the Mitigation of Ionospheric Effects on Radio Systems as the subject of this COST action.info:eu-repo/semantics/publishedVersio

Demonstrating a powerful scale-up strategy for Biosimilar mAb in single use systems via physicochemical and functional characterization

Biosimilars have received a remarkable attention in the recent years. Due to the heterogeneity of biosimilar mAbs, they need to be well-characterized by various orthogonal techniques in order to identify their physicochemical and functional characteristics. Characterization of the post translational modifications, especially, glycosylation is vital to define the critical quality attributes (CQAs) which affect safety, efficacy and quality of drugs. In this study, we were able to manipulate the quality of the drug by using scale-up strategies for single use systems. By using ultra-performance liquid chromatography (UPLC) coupled to mass spectrometry (MS), we were able to demonstrate physicochemical similarities between innovator and its biosimilar candidate. Even the PTM (N-terminal pyroglutamic acid formation, C-terminal lysine truncation, methionine and tryptophan oxidation, asparagine deamidation, N-glycosylation and glycation) levels of two products from 3 and 200-liter single-use bioreactors were highly similar compared to the innovator. The mass spectrometry studies showed that the scale-up strategy from 3 liter to 200 liter was successful. Deconvoluted mass spectrum for intact and reduced masses (heavy and light chain) of innovator and its biosimilar candidates from different production scales were significantly similar. Oxidation was observed to be lower in 200 liter bioreactor compared to the 3 liter. The N-glycan profiles for the major and minor glycan species were highly similar compared to the originator. Aggregation level in 200 liter was slightly lower than that of the small scale production. Mass spectrometry becomes an important tool to enhance the biosimilarity to the originator in order to decrease the clinical efforts to be able to provide affordable drugs to the patients

Effects of 8 Weeks of Plyometric Exercise on Certain Physiological Parameters and Performance of Swimmers

In this study, it is aimed to review the effects of 8 week plyometric exercises on certain physiological parameters and freestyle swimming performance of swimmers of age 10-11 who practice swimming with a licence in city of Van. Study group has been created by 24 male volunteer swimmers who practice swimming with a licence in city of Van. 24 volunteer athletes aged 10-11, who are licenced swimmers for two years and who exercise regularly 5 days a week have been selected for the study. The athletes are randomly divided into experimental and control groups of 12. Throughout the study, in addition to swimming exercises, experimental group is scheduled to 3 days a week plyometric exercise program. Control group is not given any additional exercise except from the swimming exercises. It is seen that the obtained data does not show normal distribution and non-parametric tests of Mann Whitney U and Wilcoxon Test are used for data analysis. Significance level is taken as p0,05).      As a result, it is seen that the 8 week plyometric exercise has a significant effect on vertical leap and even though not statistically significant, it is pondered that it has a positive effect on freestyle swimming duration of experimental group, compared to that of control group

Evaluation of the Oxidative Effect of Long-Term Repetitive Hyperbaric Oxygen Exposures on Different Brain Regions of Rats

Hyperbaric oxygen (HBO2) exposure affects both oxidative and antioxidant systems. This effect is positively correlated with the exposure time and duration of the treatment. The present study aims enlightening the relation of HBO2 with oxidative/antioxidant systems when administered in a prolonged and repetitive manner in brain tissues of rats. Sixty rats were divided into 6 study (n = 8 for each) and 1 control (n = 12) group. Rats in the study groups were daily exposed 90-min HBO2 sessions at 2.8 ATA for 5, 10, 15, 20, 30 and 40 days. One day after the last session, animals were sacrificed; their whole brain tissue was harvested and dissected into three different regions as the outer grey matter (cortex), the inner white matter and cerebellum. Levels of lipid peroxidation and protein oxidation and activities of superoxide dismutase and glutathione peroxidase were measured in these tissues. Malondialdehyde, carbonylated protein and glutathione peroxidase levels were found to be insignificantly increased at different time-points in the cerebral cortex, inner white matter and cerebellum, respectively. These comparable results provide evidence for the safety of HBO treatments and/or successful adaptive mechanisms at least in the brain tissue of rats, even when administered for longer periods

Malignant melanoma of the stomach presenting in a woman: a case report

<p>Abstract</p> <p>Introduction</p> <p>Malignant melanoma is reported to metastasize to all organs of the human body. Although it is common for it to metastasize to the gastrointestinal tract, a melanoma located primarily in the gastric mucosa is an uncommon tumor. Gastrointestinal metastases are rarely diagnosed before death with radiological and endoscopic techniques.</p> <p>Case presentation</p> <p>In this case report the clinical course and treatment of a woman with melanoma of the stomach, without any other detectable primary lesion, is presented and discussed. A 55-year-old Turkish woman presented to our clinic with complaints of muscle pain and bone pain in the left side of her chest. During an upper gastrointestinal system endoscopy, dark cherry-colored, light elevated, round-shaped lesions were taken from her gastric fundus and from the first part of her duodenum. Biopsies from these samples were determined to be malignant melanoma by the pathologist.</p> <p>Conclusion</p> <p>Metastatic malignant melanoma cases should be examined through endoscopy for gastrointestinal metastases.</p