The theory of static aeroelastic stability of supersonic wings including chordwise bending, as developed in reference 1, is further extended to include the influence of stresses arising from thermal gradients. The wing spanwise twist distribution is found to obey an ordinary differential equation of the fourth order whose coefficients depend on the thermal gradients. The influence of finite def...

OBJECTIVE To evaluate two cases of intermittent exotropia treated by vision therapy the efficacy of the treatment by complementing the clinical examination with a 3D videooculography to register and to evidence the potential applicability of this technology for such purpose. METHODS We report the binocular alignment changes occurring after vision therapy in a woman of 36 years with an intermi...

BACKGROUND In the last years intramedullary nailing has become the treatment of choice for most displaced diaphyseal tibia fractures. In contrast intramedullary nailing of distal tibia fractures is accompanied by problems like decreased biomechanical stability. Nevertheless the indications for intramedullary nailing have been extended to include even more distal fractures. The purpose of this s...

BACKGROUND Intramedullary fixation of comminuted mid-shaft clavicle fractures has traditionally been employed with satisfactory clinical outcomes; however, pins with smooth surfaces may protrude from the bone and are prone to migration, while some threaded pins are difficult to remove post-operatively. The aim of this proof-of-concept study was to develop and evaluate the biomechanical strength...

OBJECTIVE To investigate the biomechanical properties of the percutaneous compression plating system for intertrochanteric hip fractures. DESIGN A biomechanical laboratory investigation on human cadaveric upper femora was conducted. SETTING Biomechanical laboratory. PATIENTS Sixteen femora from cadavers of patients aged 60 to 85 years. INTERVENTION An intertrochanteric fracture was perf...

The instrumentation of high-speed imaging has been a challenge for scanning probe-based technologies. Mechanical stability of the system, surface tracking at sharp topographic transitions and prolonging tip lifetime have been the determining factors for practical applications. In this paper we report a new type of feedback control based on the torsional resonance amplitude (TRmode ) of cantilev...

A hybrid longitudinal-torsional ultrasonic transducer is designed and fabricated in this research. The design of the transducer was performed using the FE method with ABAQUS software, with the aim of combining the longitudinal and torsional vibration modes. The transducer horn is then fabricated using a 4-axis milling machine. The PZT stacks are employed in order to excite the transducer. The t...