We propose a new technique for quad-dominant remeshing which separates the local regularity requirements from the global alignment requirements by working in two steps. In the first step, we apply a slight variant of variational shape approximation in order to segment the input mesh into patches which capture the global structure of the processed object. Then we compute an optimized quad-mesh f...

This paper presents the modeling of a four rotor vertical take-off and landing (VTOL) unmanned air vehicle known as the quad rotor aircraft. The paper presents a new model design method for the flight control of an autonomous quad rotor. The paper describes the controller architecture for the quad rotor as well. The dynamic model of the quad-rotor, which is an under actuated aircraft with fixed...

The need for transparent information on qualifications and learning opportunities across Europe is essential to support recruitment, career management, lifelong learning strategies and recognition processes. This requires stakeholders (awarding bodies, Member States authorities, employment services, education/training institutes, social partners, jobseekers, learners, employers, etc.) to cooper...

Quad rotor is a renowned underactuated Unmanned Aerial Vehicle (UAV) with widespread military and civilian applications. Despite its simple structure, the vehicle suffers from inherent instability. Therefore, control designers always face formidable challenge in stabilization and control goal. In this paper fuzzy membership functions of the quad rotor’s fuzzy controllers are optimized using nat...

BACKGROUND In cardiac resynchronization therapy (CRT), quadripolar (QUAD) left ventricular (LV) leads are less prone to postoperative complications than non-QUAD leads. Some studies have suggested better clinical outcomes. METHODS AND RESULTS Clinical events were assessed in 847 patients after CRT-pacing or CRT-defibrillation using either QUAD (n=287) or non-QUAD (n=560), programmed to single...

This thesis paper describes QUaD, a millimetric polarimeter designed to precisely measure the temperature and polarization anisotropies in the cosmic microwave background (CMB) radiation. QUaD was built and integrated between 2000 and 2004, and commissioned at the south pole in the austral summer of 2004/2005. First light was achieved in February 2005, and QUaD acquired a full austral winter of...

PURPOSE Because of the importance of hamstrings (HAM) and quadriceps (QUAD) strength for anterior cruciate ligament (ACL) injury prevention and the high incidence of ACL injury in ski racing, HAM and QUAD maximal and explosive strength were assessed in ski racers with and without ACL reconstruction (ACL-R). METHODS Uninjured (n = 13 males, n = 8 females) and ACL-R (n = 3 males, n = 5 females,...

In this paper, we describe an image database system that can retrieve images that are similar to a query image. The query image is processed to extract information that is matched against an index to provide pointers to similar images. The salient feature of the system is that the index is developed from the jpeg-compressed images without rst having to uncompress them. We use a similarity measu...

Quad-rotors have been a very popular topic for research in the current literature because of its capability to perform different tasks autonomously. This paper focuses on the modeling of a quad-rotor aircraft dynamics based on experimental data. It will be demonstrated that a linear model could represent its dynamics despite of quadrotor's strong nonlinearities. Also, it will be shown how a qua...