Bluetooth Low Energy Applications in MATLAB

This chapter presents Bluetooth Low Energy (BLE) applications in MATLAB. Through these applications we acquire measurement data from BLE compatible sensors to PC. The sensors are CC2541 Keyfob and CC2650 Sensor Tag. The first one contains an accelerometer and a temperature sensor while the second one contains more sensors, but inertial sensors and magnetometer are invoked. The PC should be equipped with a general USB BLE adapter. The most important steps for implementing a BLE application are presented: scanning, connecting, configuring and data reading. Following this, more detailed applications are presented: a wireless sensor network for temperature measurement with three Keyfob-based nodes, an application that displays in real time accelerometer data and a heading computed method using either the gyroscope or the magnetometer of CC2650 Sensor Tag. The most important MATLAB elements that are used to implement these applications are different types of variables such as structure, table and object, methods to implement endless loops and real-time display of acquired data and using quaternions to handle 3D orientation of a device

NEW CULTURAL HORIZONS: 3D

Nowadays, we are witnessing new horizons in the contemporary cinema: the 3D technique’s giant step. The question is: is 3D a valid criteria? The filmmaker wants you to live with the characters, offering Cinema an incredible flexibility as a multicultural platform. We have no universal scale at our disposal to measure the quality of a good story, of a memorable film, or even of an innovative technique. It is more a matter of communis opinio: what is generally accepted as good quality. At the start of the film you have to engage the minds and hearts of the audience. It’s crucial, it is a hyatus. The presentation is based on individual film analysis, exemplified by interviews with James Cameron (the director of “Avatar”), with Wim Wenders (the director of the 3D documentary “Pina”) and as well, will take into consideration a case study focused on how the Romanian public understands 3D

MODELING THE DIRECT TENSILE STRENGTH FOR LIGNITE EXTRACTED AT U.M.C. PESTEANA USING THE FINITE-DISCRETE ELEMENT METHOD (FDEM)

In rock mechanics labs, the tensile strength test is carried out by either direct or indirect methods. Among indirect test methods, the most common is a diametrical compression on a disk specimen, also known as the Brazilian Tensile Strength (BTS) test. Testing by direct methods is cumbersome because attaching specimens into the testing machine clamps is difficult because of the dog-bone shape, and also because the clamping of the specimen may cause an uneven distribution of stresses, so that the results obtained are unreliable or vitiated. Thus, numerical methods replicating this type of testing are welcome, hence in this paper the direct tensile strength test of a dog-bone shaped specimen of lignite will be conducted using numerical methods offered by IRAZU Software