Tonguç ve eğitim reformu

Taha Toros Arşivi, Dosya No: 124-İsmail Hakkı Tonguç. Not: Gazetenin "Olaylar ve Görüşler" köşesinde yayımlanmıştır.Unutma İstanbul projesi İstanbul Kalkınma Ajansı'nın 2016 yılı "Yenilikçi ve Yaratıcı İstanbul Mali Destek Programı" kapsamında desteklenmiştir. Proje No: TR10/16/YNY/010

Gerçeği gören Tonguç

Taha Toros Arşivi, Dosya No: 124-İsmail Hakkı Tonguç. Not: Gazetenin "Olaylar ve Görüşler" köşesinde yayımlanmıştır.Unutma İstanbul projesi İstanbul Kalkınma Ajansı'nın 2016 yılı "Yenilikçi ve Yaratıcı İstanbul Mali Destek Programı" kapsamında desteklenmiştir. Proje No: TR10/16/YNY/010

Yıkılmayan adam:Hakkı Tonguç

Taha Toros Arşivi, Dosya No: 124-İsmail Hakkı Tonguç. Not: Gazetenin "Kaybettiğimiz Değerler" köşesinde yayımlanmıştır.Unutma İstanbul projesi İstanbul Kalkınma Ajansı'nın 2016 yılı "Yenilikçi ve Yaratıcı İstanbul Mali Destek Programı" kapsamında desteklenmiştir. Proje No: TR10/16/YNY/010

Titan's Obliquity as evidence for a subsurface ocean?

On the basis of gravity and radar observations with the Cassini spacecraft, the moment of inertia of Titan and the orientation of Titan's rotation axis have been estimated in recent studies. According to the observed orientation, Titan is close to the Cassini state. However, the observed obliquity is inconsistent with the estimate of the moment of inertia for an entirely solid Titan occupying the Cassini state. We propose a new Cassini state model for Titan in which we assume the presence of a liquid water ocean beneath an ice shell and consider the gravitational and pressure torques arising between the different layers of the satellite. With the new model, we find a closer agreement between the moment of inertia and the rotation state than for the solid case, strengthening the possibility that Titan has a subsurface ocean.Comment: 11 pages, 4 figure

THE EFFECT OF USE OF MULTIPLE REPRESENTATIONS IN SOCIAL SCIENCES CLASS ON THE STUDENTS' ACADEMIC SUCCESS AND ATTITUDES TO THE SOCIAL STUDIES COURSE

The learning environment should support students' interest, desire and attitude towards learning. Qualified learning environments will positively affect students' learning situations. For this reason, teachers should use effective learning/teaching approaches in their lessons in order to enrich learning environments. Especially in the social studies course, where the concepts and knowledge of many disciplines are taught with an interdisciplinary approach, teachers should use effective learning/teaching approaches skillfully. One of the approaches that will increase the level of learning in social studies course is multiple representations. The use of multiple representations is an approach that improves students' mental characteristics and is effective in teaching abstract concepts. The aim of this research is to test the effectiveness of teaching practices supported by multiple representation in the social studies course, which includes many abstract concepts. In this study, a quasi-experimental model with pretest-posttest control group was used. In the research, the effect of teaching using multiple representation in social studies teaching on students' academic achievement and attitudes towards social studies lesson was observed. The sample of the research consists of 40 students studying in the 4th grade of primary school. In order to collect data in the research; "The Place We Live In Achievement Test" developed by the researcher and the "Attitude Scale Towards Social Studies Lesson" developed by Arslan and Şahiner (2010) were used. Before the study, the achievement test and the attitude scale were applied to the experimental and control groups as a pre-test. In the five-week period, the control group, with program-based teaching methods; In the experimental group, the lesson was taught with activities prepared with multiple representations. At the end of the process, a post-test was given to the experimental and control groups. As a result of the research, it was concluded that the use of multiple representations positively affected the academic success of the students and their attitudes towards the social studies course.  Article visualizations

The rotation of Mimas

The Cassini mission in the Saturnian system is an outstanding opportunity to improve our knowledge of the satellites of Saturn. The data obtained thanks to this mission must be confronted to theoretical models. This paper aims at modeling the rotation of Mimas, with respect to its possible internal structure. For that, we first build different interior models, in considering Mimas as composed of 2 rigid layers with different porosity. Then we simulate the rotational behavior of these models in a 3-degree of freedom numerical code, in considering complete ephemerides of a Mimas whose rotation is disturbed by Saturn. We also estimate the deviation of its longitudinal orientation due to tides. We expect a signature of the internal structure up to 0.53{\deg} in the longitudinal librations and an obliquity between 2 and 3 arcmin, the exact values depending on the interior. The longitudinal librations should be detectable, inverting them to get clues on the internal structure of Mimas is challenging

Transient pores in vesicles

International audienceWe present our observations of transient pores in giant unilamellar vesicles, placed under tension, by optical illumination. When the membrane tension reached a certain level, transient pores appeared. Pore opening is driven by the membrane tension, s, and its closure by the pore's line tension, T. By use of viscous mixtures of glycerol and water, we slowed down the leak out of the inner liquid in the presence of a pore. This allowed pores to reach large sizes (a few micrometres) and last at least a few seconds so that they could be visualized by fluorescence videomicroscopy. Line tension was inferred from the measurements of the closure velocity of the pores. By addition of cholesterol, which increased T (reducing pore lifetimes), or of surfactants, which decreased T (increasing pore lifetimes), we demonstrate how T , and consequently pore lifetimes, can be controlled over nearly two orders of magnitude. Addition of surfactants also has a dramatic effect on vesicle fusion. We discuss how our results can be extended to less viscous aqueous solutions which are more relevant for liposomal drug delivery formulations