The BBC micro:bit - discover your inner maker!
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Presenting our BBC micro:bits at the SIG-WELL workshop at the EC-TEL 2016 conference in Lyon, France.
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Over the last years it turned out that people want more lightweight and mobile-friendly tools; we found the old monolithic system to be very hard to maintain to add new features. Therefore we are currently redeveloping it from scratch integrating many ideas from our users and incorporating new research findings. We are further driven by a mobile-first approach to support a wide variety of devices. We additionally want to support various social features like sharing on social networks or blogs and allowing discussions and rating amongst end-users and developers.
At FOSDEM we would like to encourage open source developers in rethinking the way requirements are currently gathered from the crowd. How do we want to collect new software ideas or simply feature requests from our users. Will it really be through feedback forms in our apps About menu? Do our users really think in terms of issues like we developers do? How can gamification be used to reward actual end-users of software? We hope Requirements Bazaar can answer these questions and fill the gap!DireWolf Goes Pack Hunting: A Peer-to-Peer Approach for Secure Low Latency Wi...
DireWolf Goes Pack Hunting: A Peer-to-Peer Approach for Secure Low Latency Wi...IstvanKoren
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Widget-based Web applications are outperforming monolithic Web applications in terms of distribution of the user interface on many devices and many standard browsers. However, latency of the remote inter-widget communication may be an obstacle for the uptake of Widget-based Web applications in near real-time domains like Web gaming and augmented reality. In this demo paper we show DireWolf 2.0 which is replacing the XMPP server of the DireWolf approach by a client-side relay realized by the means of WebRTC. This is not only decreasing the latency of the distributed interface for any application but also increasing the security by avoiding man-in-the-middle attacks on the XMPP server. This progress is enabling further uptake in Widget-based solutions in advanced Web engineering.Shared Editing on the Web: A Classification of Developer Support Frameworks
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This document discusses developer support libraries for shared editing on the web. It begins by outlining server-push technologies like Ajax, Comet, and WebSockets that enable real-time collaboration. Consistency algorithms like operational transformation and differential synchronization that power collaborative editing are also introduced. Popular libraries are then surveyed, including Google Drive Realtime API, OpenCoweb, MobWrite, and ShareJS. The document concludes by discussing the ROLE SDK and collaborative tools built with it, along with an outlook on future work.Informatik-Kolloquium XMPP
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XMPP The Potential Heartbeat of Global-Scale Pervasive Computing. Dr. Daniel Schuster will give a talk on Thursday, July 18th at 4:30 pm in Informatik-Zentrum, AH I about how XMPP can connect diverse devices and enable new applications like augmented reality gaming, remote robot control via mobile devices, and distributing user interfaces across multiple screens. The ACIS group at RWTH Aachen University also offers student research opportunities in these and other related areas.Recently uploaded (11)
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Materials, Sensors, and Actuators in MEMS Technology Evolution
Microelectromechanical Systems (MEMS) technology has revolutionized various industries, including automotive, healthcare, aerospace, and consumer electronics. MEMS devices integrate mechanical and electrical components at the microscale, enabling precise sensing, actuation, and control. The evolution of MEMS has been significantly influenced by advancements in materials, sensors, and actuators. This document provides a comprehensive analysis of the role of materials, sensors, and actuators in the development of MEMS technology.
1. Introduction to MEMS Technology
MEMS technology refers to miniaturized mechanical and electro-mechanical devices fabricated using microfabrication techniques. These systems typically include sensors, actuators, and electronic components integrated onto a single chip. The advancements in MEMS technology have been driven by the development of novel materials, improved fabrication techniques, and enhanced sensor-actuator performance.
Key Features of MEMS Technology:
Miniaturization of mechanical components
Integration of electronic circuits and mechanical systems
High precision and sensitivity
Low power consumption
Cost-effective mass production
2. Materials in MEMS Technology
The choice of materials plays a crucial role in determining the performance, reliability, and efficiency of MEMS devices. MEMS materials can be broadly classified into structural materials, functional materials, and packaging materials.
2.1 Structural Materials
Structural materials form the backbone of MEMS devices and are responsible for mechanical strength, stability, and durability.
(a) Silicon-Based Materials
Single-Crystal Silicon (Si): The most widely used material in MEMS due to its excellent mechanical properties, low cost, and compatibility with semiconductor fabrication.
Polycrystalline Silicon (Poly-Si): Commonly used for microstructures such as beams, membranes, and cantilevers.
Silicon Carbide (SiC): Offers high-temperature stability and chemical resistance, making it suitable for harsh environments.
(b) Metal-Based Materials
Aluminum (Al): Used for interconnects and microstructures due to its good electrical conductivity and ease of deposition.
Gold (Au) and Platinum (Pt): Preferred for biomedical applications due to their biocompatibility.
Titanium (Ti): Provides high strength and corrosion resistance for specialized MEMS applications.
(c) Polymer-Based Materials
Polydimethylsiloxane (PDMS): Widely used in biomedical MEMS due to its flexibility and biocompatibility.
SU-8: A high-aspect-ratio photoresist polymer used in microfluidics and lab-on-a-chip applications.
Polyimide: Provides good mechanical and thermal properties for flexible MEMS applications.
2.2 Functional Materials
Functional materials exhibit specific electrical, magnetic, thermal, or optical properties that enhance MEMS device performance.
(a) Piezoelectric Materials
Lead Zirconate Titanate (PZT): Common
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