This work presents an optical non-contact technique to evaluate the fatigue damage state of CFRP structures measuring the irregularity factor of the surface. This factor includes information about surface topology and can be measured easily on field, by techniques such as optical perfilometers. The surface irregularity factor has been correlated with stiffness degradation, which is a well-accep...

Ultra-light metal foams became an attractive research field both from the scientific and industrial applications view points. Closed-cell metal foams, in particular aluminium alloy (Al-alloy) ones can be used as lightweight, energy-absorption and damping structures in different industrial sectors, detaining an enormous potential when transportation is concerned. Despite the several manufacturin...

This study aims to analyze the influence of Mix Marketing, Market Orientation, Competitive Advantage and Product Differentiation Non Aeronautical Revenue. also uses Word-Of-Mouth (Testimony) as a moderator variable see its role in strengthening or weakening relationship Non-Aeronautical Revenue Performance Improvement. The research method used is quantitative design with questionnaires taken fr...

The IP-based Broadband Aeronautical Satellite Network will provide numerous new applications and services for both airspace system operations and passenger communications. However, the performance of data communications protocols and applications over such systems is dramatically degraded, especially the Internet TCP/IP protocol suite. In this paper, we propose a new transport protocols for sat...

This paper contains a description of two types of forward error correction (FEC) codes for shaped offset quadrature phase shift keying, telemetry group version (SOQPSK-TG). The FEC codes are a low-density parity check (LDPC) code and a serially concatenated convolutional code (SCCC). The contributions of this paper are on the system-design level. One major contribution is to design a SCCC code ...

This paper investigates the application of 16-APSK modulation to aeronautical mobile telemetry. The peak-to-average power ratio vs. code rate tradeoff is mapped to an optimization problem involving spectral efficiency and the constellation parameters. The optimization results produce a theoretically optimum solution that is 3.95 times more spectrally efficient as uncoded SOQPSKTG. When implemen...

A narrowband channel model for multipath fading in aeronautical telemetry applications is described. This channel is composed of a line-of-sight signal, a specular reflection whose strength is 20% to 80% that of the line-of-sight signal, and a diffuse multipath component whose power is 10 to 20 dB less than that of the line-of-sight signal. Thus the channel is close to additive white Gaussian n...

The Single European Sky Air Traffic Management (ATM) research programme SESAR has identified continued growth in demand for aircraft communications as air traffic increases and communications become more network centric. Alongside existing systems such as VHF Data Link Mode 2, new systems such as the L-band Digital Aeronautical Communication System (LDACS) and the Aeronautical Mobile Airport Co...

Simulation is a promising pedagogical tool in the area of medical education. High- fidelity simulators can reproduce realistic environments or clinical situations. This allows for the practice of teamwork and communication skills, thereby enhancing reflective reasoning and experiential learning. Use of high-fidelity simulators is not limited to the medical and aeronautical fields, but has devel...