Teaching of Force and Motion Concepts through Game-Based Physical Activities at Elementary Level

Bu çalışmanın amacı, oyun temelli fiziksel etkinlikler yoluyla kuvvet ve hareket kavramlarının öğretimine dayalı etkinliklerin etkisini tespit etmektir. Çalışmaya 3. ve 4. sınıfa geçecek toplam 21 ilkokul öğrencisi katılmıştır. Araştırmada bağımlı değişken kuvvet ve hareket kavramları üzerine odaklanan fen akademik başarısıdır. Bu araştırma nicel araştırma yöntemlerinden tek gruplu öntest-sontest modeline göre desenlenmiştir. Denel işlemden önce öğrencilere kuvvet başarı testi öntest olarak verilmiştir. Daha sonra kuvvet ve hareket kavramlarının öğretimi için geliştirilen sekiz etkinlikten oluşan denel işlem gerçekleştirilmiştir. Denel işlemden sonra öğrencilere kuvvet başarı testi sontest olarak uygulanmıştır. Denel işlemde öğrenciler her gün 1.5 saatlik sürede iki etkinliğe katılmışlardır. Çalışma toplam dört gün sürmüştür. Araştırmacılar tarafından hazırlanan başarı testinden elde edilen veriler Wilcoxon İşaretli-sıralar testi ile analiz edilmiştir. Analiz sonucu, öğrencilerin kuvvet başarı testinden aldıkları deney öncesi ve sonrası puanları arasında anlamlı bir fark olduğunu göstermiştir (z=3.23; p<.05). Bu sonuca dayalı olarak bazı önerilerde bulunulmuştur.The purpose of this study was to determine effect of the treatment based on teaching force and motion concepts through game-based physical activities. A total of 21 elementary school students from 3rdand 4th grades were participated in the study. The dependent variable was science achievement that was focused on force and motion concepts. The current study was designed as the one-group pretest-posttest model that is one of the quantitative research methods. Before the treatment students were given force achievement test as pretest. Then, students were given the treatment that included eight physical activities through which force and motion concepts were taught. After the treatment, force achievement test was given as posttest to the students. Students were introduced two activities that took one and half hours in each day during the treatment. The duration of the treatment was four days. The data obtained from the science achievement test developed by the researchers were analyzed by the Wilcoxon signed-rank test. The analysis indicated there was a statistically significant difference between students' pretest and posttest scores (z=3.23, p&lt;.05). Some suggestions were made based on the result

Metabolic dysfu nctio n-As socia ted fatty liver disease and fibrosis status in patients with Type 2 Diabetes Treated at Internal medicine clinics: Türkiye DAHUDER awareness of fatty liver disease (TR-DAFLD) study

Background/Aims: This awareness study aimed to determine the ultrasound (US) examination rates in relation to US-confirmed metabolic dysfunction-associated fatty liver disease (MAFLD) diagnosis in internal medicine outpatients with type 2 diabetes (T2D) across Turkiye. Materials and Methods: A total of 6283 T2D patients were included in this multicenter retrospective cohort study conducted at 17 internal medicine clinics across Turkiye. The presence and indications for US performed within the last 3 years were recorded along with US-confirmed MAFLD rates, laboratory findings on the day of US, and referral rates. Fibrosis-4 (FIB-4) index was calculated to estimate the risk of advanced liver fibrosis (FIB-4 index ≥ 1.3). Results: Overall, 1731 (27.6%) of 6283 patients had US examination, which revealed MAFLD diagnosis in 69.9% of cases. In addition, 24.4% of patients with US-confirmed MAFLD were at risk of advanced fibrosis (FIB-4 index ≥ 1.3), and the referral rate was 15.5%. Conclusion: In conclusion, our findings emphasize an insufficient MAFLD awareness among clinicians and the likelihood of most of T2D patients to be at risk of living with an unknown status regarding their MAFLD and advanced fibrosis ris

Probleme dayalı öğrenme öğretiminin 7. sınıf öğrencilerin fen başarısına, fene karşı tutumuna ve bilimsel süreç becerilerine etkisi.

The purpose of this study is to investigate the effect of instruction based on problem-based learning (PBL) on 7th grade students’ science achievement, attitude toward science course and scientific process skills. The study was conducted in May 2007 with 141 students and four science teachers from four middle schools in Gölbası district of Ankara. A total of eight classes were participated in the study. Four of them were assigned randomly to control group and four of them were assigned randomly to experimental group. There are two different experimental groups. One of the experimental groups was given the PBL instruction through individual work (PBL-I). The other group took the PBL instruction by making group work (PBL-G). Two classes were assigned randomly to PBL-I group and the remaining two were assigned randomly to PBL-G. Before starting the treatments a needs analysis was conducted to develop scenarios so that they can address students’ interests. Moreover, a pilot study was conducted in the previous academic year for the instructional materials and instruments developed by the researcher. Treatments, given by the teachers, continued up to five weeks. The control group was given traditional instruction, whereas, the PBL-I group took the PBL instruction through individual work, the PBL-G group took the PBL instruction via group working. The dependent variables of the study were attitude toward the course, scientific process skills, and academic achievement. The collected data were analyzed through MANCOVA. The analyses yielded that there is no statistically significant mean difference between groups on the scores of attitude, scientific process skills and academic achievement. In addition, aptitude-treatment interaction analysis was conducted. This analysis indicated that effect of the PBL instructions differ with respect to covariates. In other words, the PBL instructions work well in some levels of the covariates, while in other levels, traditional instruction yields better results. Qualitative data were obtained through students’ self-evaluations and interviews made with students and teachers. Document analysis was conducted for the data collected through self-evaluation form. This analysis showed that PBL students mostly engaged with doing research, designing and making experiments. However, students in the control group usually, listened to their teachers, write down definitions, formulas, graphs from their teachers, and solved problems requiring mathematical operations. According to the interviews, students in general are enthusiastic about the PBL instruction.Ph.D. - Doctoral Progra

Investigation on the abrasive and corrosive characteristics of electroless Ni-B-MO platings

Tez (Yüksek Lisans) -- İstanbul Teknik Üniversitesi, Fen Bilimleri Enstitüsü, 2013Makine mühendisliği alanındaki hasar doğurucu faktörlerin en önemlileri aşınma, yorulma ve korozyondur. Makine parçalarının hasar görüp işlev görememesine sebebiyet veren bu faktörlerle mücadele etmek için yüzey mühendisliği başlığı altında bir dizi iyileştirme işlemine gidilir. Yüzey mühendisliği, mühendislik bileşenlerinin yüzeylerinin işlevlerini iyileştirmek ve servis ömürlerini artırmak amacıyla gerçekleştirilen çok disiplinli bir faaliyettir. Yüzey mühendisliği başlığı altındaki lazer ile eritme, bilya ile sertleştirme, karbürleme, nitrürleme, akımsız kaplama ve kimyasal buhar biriktirme gibi işlemlerle malzemelerin korozyon dayanımları, aşınma dirençleri, yorulma dayanımları, tokluk dayanımları, elektronik ve elektriksel özellikleri artarken, sürtünme enerjisi kayıpları azalır. Yüzey mühendisliğinin malzemeye bir yüzey tabakası veya kaplama ekleyen yöntemlerinden biri olan akımsız nikel kaplamalar parçanın şekil ve boyutlarından etkilenmeksizin her yerde eşit kalınlıkta kaplama oluşturulabilmesi, istenilen kalınlıkların kontrol edilebilmesi, kaplama sertliğinin ilave metal ile değiştirilebilmesi, düşük işçilik maliyeti, farklı mühendislik malzemelerine uygulanabilmesi, otokatalitik reaksiyon oluşumu gibi özellikleri ile öne çıkan bir yüzey sertleştirme yöntemidir. Akımsız nikel kaplamalar, otomotivden havacılığa, elektrik-elektronikten müzik enstrümanlarına geniş bir alanda yüksek korozyon dayanımı ve yüksek aşınma dayanımı sağlamak amacıyla tercih edilmektedir. Akımsız nikel kaplamalar; nikel kaynağı, indirgeyici, dengeleyici, kompleks oluşturucu ve enerji kaynağının mevcudiyetindeki banyolara kaplanacak malzemenin yerleştirilmesi ile gerçekleştirilir. Akımsız nikel kaplamaların nikel-bor, nikel-fosfor ve dubleks kaplama şeklinde çeşitleri mevcuttur.Yüksek Lisan

The Relationship between Pre-service Primary School Teachers’ Beliefs about Mathematics and Critical Thinking Dispositions

The aim of this study is to determine the level of relationship between pre-service primary school teachers’ mathematics-related beliefs and their critical thinking disposition. The research follows a quantitative paradigm in the data context and is designed according to the relational survey method. The participants were the third and fourth grade students who were studying at the Department of Primary School Education at the Faculty of Education in a state university in Turkey in the 2014-2015 academic year. Two main data collection tools were used in the research. One of them is the Mathematics Related Beliefs Scale (MRBS) developed by Kayan, Haser and Işıksal-Bostan (2013) and the other is the California Critical Thinking Disposition Inventory which had been adapted by Kökdemir (2003) into Turkish. In the data analysis, mean, independent samples t- test and Pearson moments correlation coefficient were used. According to the findings, it was found that the pre-service primary school teachers agreed more on constructivist belief statements than traditional beliefs. Also, critical thinking dispositions were seen to be partly positive. There was no significant difference in pre-service teachers' maths-related beliefs as well as in their critical thinking dispositions compared to the class level variables. Finally, according to the results of correlation analysis, a low level of positive correlation between the constructivist beliefs dimension and the critical thinking dispositions scale factors was found

The impact of treatment with continuous positive airway pressure on acute carbon monoxide poisoning

*Parlak, İsmet ( Aksaray, Yazar )Introduction:Approximately 50,000 patients per year present at emergency departments (EDs) because of carbon monoxide (CO) intoxication. The hypothesis of this study was that the half-life of CO and the regression period of complaints could be reduced more rapidly by applying oxygen with the Continuous Positive Airway Pressure (CPAP) modality using a non-invasive mechanical ventilator.Methods:The patients were divided into Group 1 and Group 2 in terms of the treatment method applied. Patients in Group 1 received FiO2 1.0 15 l/minute oxygen at room temperature for at least 30 minutes with a non-rebreather mask. Patients in Group 2 received FiO2 1.0 oxygen at 12 cmH2O pressure with non-invasive mechanical ventilation for at least 30 minutes with an oronasal mask in the CPAP modality.Results:The median values (interquartile range) of carboxyhemoglobin (COHb) levels at zero and 30 minutes of patients were 19% (8) and 14% (6) in Group 1 and 22% (8) and nine percent (3) in Group 2; a median difference of six percent (2) was detected in Group 1 and of 13% (4) in Group 2 in the first 30 minutes (P <.001). When the symptoms of the patients were examined, the median values of Group 1 and Group 2 at zero minutes were both eight units and at 30 minutes were five and three units, respectively. A decrease of five units was determined in the median of Group 2 in the first 30 minutes, and a decrease of two units in the median of Group 1 (P <.001).Conclusion:The use of CPAP was determined to more rapidly reduce COHb level as opposed to high-flow oxygen therapy. It is also thought that it may enable earlier discharge by reducing the duration of the emergency follow-up since it provides a faster improvement in the symptoms of the patients...

Evaluation of vibration characteristics of a hydroxyl (HHO) gas generator installed diesel engine fuelled with different diesel-biodiesel blends

1st International Mediterranean Science and Engineering Congress (IMSEC) -- OCT 26-28, 2016 -- Adana, TURKEYWOS: 000412033800075There are two main reasons of alternative fuel search of scientists: environmental problems resulted from combustion of fossil fuels and limited reserves of crude oil. Biodiesel and Hydrogen (H-2) are two of the most promising alternative fuels with their environmental friendly combustion profiles. The aim of this study was to evaluate vibration level of a hydroxyl (HHO) gas generator installed and diesel engine using different kinds of biodiesel fuels. In this study, at different flow rates, the effect of HHO gas addition on engine vibration performance was investigated with a Mitsubishi Canter 4D34 -2A diesel engine. HHO gas introduced to the test engine via its intake manifold with 2, 4 and 6 L per minute (LPM) flow rates when the engine was fuelled with sunflower, canola, and corn biodiesels. The vibration data was collected between 1200 and 2400 rpm engine speeds by 300 rpm intervals. Finally, artificial neural network (ANN) approach was conducted in order to predict the effect of fuel properties and HHO amount on engine vibration level. (C) 2017 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved