This letter demonstrates the potential for using diffuse ultrasound measurements to detect damage in concrete. Two different solutions to the diffusion equation, an infinite three-dimensional (3D) volume model that neglects geometric boundaries and a finite 3D cuboid model, are used for the required curve fitting procedure to determine the influence of geometric boundaries on the solution. The ...

BACKGROUND This study was performed to assess the photothermal response of highly focused laser energy using infrared thermal imaging instrument to detect and assess the actual temperature distribution during flash lamp pumped pulsed dye laser (FLPPDL) treatment for port wine stain (PWS) patients and avoiding its complications. METHODS A retrospective review of 40 patients with PWS birthmark ...

Marine, aerospace, ground and civil structures can receive unexpected loading thatmay compromise integrity during their life span. Therefore, improvement in detectingdamage can save revenue and lives depending upon the application. The prognosticcapability is usually a function of the examiner’s experience, background and datacollection during the evaluation. Nondestructive eval...

PURPOSE Selective targeting of the retinal pigment epithelium (RPE) with repetitive laser pulses that minimize thermal damage to the adjacent photoreceptors is a promising new therapeutic modality for RPE-related retinal diseases. The selectivity of an alternative, more versatile scanning approach was examined in vivo by using a broad range of scanning parameters. METHODS Acousto-optic deflec...

Thermal fatigue of Cu interconnects 60 nm thick and 5–15 lm wide was investigated by using alternating current to generate cycling temperature and strain/stress. The fatigue curves exhibit two regions, i.e. highand low-cycle regions, which correspond to low and high thermal strains, respectively. The high-cycle region is found to be controlled by an unusual thermal fatigue mechanism of damage b...

A thermal stress range analysis of tungsten-rhenium thin film thermocouples based on ceramic substrates is presented to analyze the falling off and breakage problems caused by the mismatch of the thermal stresses in thin film thermocouples (TFTCs) and substrate, and nano-indentation experiments are done to measure and calculate the film stress to compare with the simulation results. Optimal des...

Background/introduction The biologic dose response curves of thermal dose and absorbed radiation dose have not been compared to each other even though they have both been extensively investigated separately and combined. Although heat and radiation produce cell kill by different biological mechanisms (Thermal dose denatures proteins and the radiation dose causes DNA damage) a comparison of dose...

BACKGROUND AND OBJECTIVES We assessed resection time and collateral thermal tissue damage of ultrasonically activated surgery (UAS) and high-frequency blade-enhanced bipolar electrosurgery (BE) in laparoscopic bowel surgery. METHODS We compared UAS laparoscopic intracorporeal small bowel mesentery re-section with an equivalent procedure performed with BE in a porcine model. Resection was defi...