Visual programming language

Summary

In computing, a visual programming language (visual programming system, VPL, or, VPS) or block coding is a programming language that lets users create programs by manipulating program elements graphically rather than by specifying them textually. A VPL allows programming with visual expressions, spatial arrangements of text and graphic symbols, used either as elements of syntax or secondary notation. For example, many VPLs (known as diagrammatic programming) are based on the idea of "boxes and arrows", where boxes or other screen objects are treated as entities, connected by arrows, lines or arcs which represent relations. Definition VPLs may be further classified, according to the type and extent of visual expression used, into icon-based languages, form-based languages, and diagram languages. Visual programming environments provide graphical or iconic elements which can be manipulated by users in an interactive way according to some specific spatial grammar for program con

Official source

https://en.wikipedia.org/wiki/Visual_programming_language

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Technology is now an important part of our lives. We often see robots cited as the future of education, and reports of their imminent entrance in schools. New projects create buzz in the media and online, but when we look at the actual situation, very few robots are currently used in education, and most of the time, the platform used is the Lego Mindstorms. Why so little diversity? What do robot actually bring to the learning experience? How can we design good educational robots? Hopes are that they bring additional motivation to pupils. Since the use of robots is fun, the learning is supposed to become easier. Robot projects and activities are also expected to foster thinking skills, collaboration, and creative spirit. Finally, there is a need to educate people on technology for two reasons. The first is to break the "black box" image they have of technology, and the second is to encourage them into technical careers. Thanks to the Swiss National Centre of Competence in Research Robotics (NCCR Robotics), we could develop some innovative concepts in educational robotics, and implement one such pedagogical tool. We designed a small wheeled robot with many sensors, and LEDs making its internal state apparent to the user. A simple, white look makes it a neutral base for creating one’s own application, for all age and gender groups. Different user interfaces allow to make it accessible to everybody: • Pre-programmed behaviours that demonstrate its different possibilities • A Visual Programming Language (VPL), without text and based on event-action pairs • The Aseba script language (text-based), with a comprehensive development environment to accompany and inform the user The resulting platform, Thymio II, is completely open-source and open-hardware. It was mass-produced and commercialised at a low cost. This gave the opportunity to evaluate the public’s response to it. We could assess that the robot design is well received and appreciated by different age and gender groups. It seems particularly popular with girls. We analysed the expectations of the different age categories and proposed activities that fitted their specific needs. We could also validate that users of Thymio II learn notions of programming, understand essential concepts such as what sensors are, what is the relationship between the robot, the computer, and the programming environment. With the VPL, they could quickly grasp the meaning of events and event-action pairs. We realised that in spite of the interest it generated, the robot was not used much at home or in schools. We think that there is a need for more guidance and that parallels should be drawn with e-learning for the use at home. In schools, we observed that teachers who use robots are pioneers, who invest time and sometimes money into new technologies out of personal interest. The others do not feel strongly against robotics but are probably discouraged by the lack of institutional injunction, appropriate training, budget, and ready-to-use pedagogical materials. At the end of this work, we conclude by giving a set of guidelines, based on our experience, for the design of educational robots. This project demonstrated very promising results and we believe that it can be a first step toward renewing teaching habits.

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Visual Programming of Fault-Tolerant Distributed Applications

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As the percentage of the total population living in urban regions is increasing, new challenges for the cities of the future arise. Smart Cities emerged as a solution to these challenges building on the strength of intelligent information, communication technologies and Internet of Things. In this work, we discuss the importance of semantic technologies as well as open IoT APIs for the future Smart Cities applications. Through an illustrative application, we demonstrate that both of the aforementioned technologies ease the computational burden of implementation, foster programming sustainability and create the necessary conditions so as to rapidly harness the available information and extract knowledge out of it. At the same time, the application's implementation lies in accordance with the latest IoT architectural recommendations such as Visual Programming interfaces for Service Composition, conformance with Big Data technologies and the latest IoT programming paradigms.

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