ABSTRACT:In this article, we present a semester-long study on using smartphone devices in computing engineering education. We developed Sortko, an Android-based smartphone application for learning sorting algorithms, an important undergraduate computer science topic. The application consists of four main components-the module for interactive sorting, the scaffolding module, the motivational module, and the graphical user interface module, each with a distinct role of helping students in learning sorting algorithms. Our research methodology included data collection with administered two surveys, collected exam results and recorded application usage data. Analysis of the collected data shows our approach is an effective way of learning sorting algorithms. ß

The DOF was significantly better after implanting the trifocal IOL compared with the monofocal IOL, and DOF is increased under near viewing conditions. The clinical results are similar to calculated DOF values when the tolerance limit of retinal blur is 10 μ.

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Introduction: DVD is a rare, poorly understood eye motility disorder of unknown etiology. In socially unacceptable deviation, surgical treatment is an option. We present patients operated with three different surgical methods. Aim: To evaluate and compare different surgical approaches for treatment of dissociated vertical deviation (DVD). Methods: Total amount of 20 patients with DVD of ≥ 20 PD are operated with three different techniques on superior rectus (SR) muscle: Group I with preoperative angle of 20-30 PD was operated with 8 mm recession of SR, Group II with preoperative angle of ≥ 30 PD undergo 3 mm recession with posterior fixation on SR and Group III with preoperative angle of ≥ 30 PD undergo-splitting of SR muscle. Surgeries for associated horizontal deviations were performed before surgery for DVD. Follow up was three years. Results: In all cases amount of DVD deviation was significantly reduced. No binocularity was gained. Although hyperdeviation of affected eye was reduced in all patients, we didn't eliminate deviation completely. Despite smaller preoperative angle, residual angle was bigger (6-12 PD) in the patients in group I where only recession of SR was performed, compared to Group II and III where postoperative angle was 4-8 PD in both groups. Conclusion: There are no recommended guidelines for the surgical treatment of DVD and treatment is based more on the surgeon's experience than evidence based data. In our experience recession of the SR should be method of choice in the cases of smaller deviation. SR recession combined with posterior fixation suture and Y-splitting seems to be a safe and effective method for surgical treatment of unilateral DVD with bigger deviation angles. Y splitting with less surgical complications and increasing effect with time can be a good alternative to posterior fixation surgery.

In this paper, the effect of different hardness filler materials and sequence of welding on the ballistic performance has been investigated. Also, besides the optimization of the ballistic properties, other mechanical testing was carried out in order to achieve wanted mechanical properties along the entire welded joint. The experimental work includes macrostructure analysis, ballistic testing, and hardness testing of steel welded joint. The base material used in the experiment were ARMOX® 500T plates. In this experiment 3 different filler materials were used. Based on the testing results, it was found out that best ballistic performance of the welded joint is achieved if capping layer is welded with a hardfacing filler material. This distributes the impact energy to a greater area and transfers it to the lower hardness weld layer underneath which then absorbs the rest of the energy.