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Nowadays, Cardiovascular Magnetic Resonance (CMR) is gaining popularity in medical imaging and diagnosis. The acquisition of CMR images needs to be synchronized with the current cardiac phase to compensate the motion of the beating heart. The Electrocardiogram (ECG) signal can be used for such applications by detecting the QRS complex. However, the magnetic fields of the MR scanner contaminate the...
Perovskite based hybrid organic/inorganic solar cells have recently emerged as a possible alternative to silicon PV technology. These cells are solution processed which makes them significantly cheaper than the current technologies. In addition, the power conversion efficiency of such cells has surged from 6% to 19% in few years and consequently has induced a huge enthusiasm in the photovoltaics community...
Various methods of cell manipulation have been applied for cancer treatment including ultrasonic manipulation like sonodynamic therapy and high intensity focus ultrasound (HIFU). The effects of ultrasonic wave are divided into 2 types; thermal and non-thermal effect, which is generated by high and low frequency respectively. Low frequency of ultrasonic manipulation is very interesting due to enhancement...
Knee osteoarthritis is a chronic joint inflammation disease that affects the aged population nowadays. The disease leads to gradual degradation of cartilage and thus deteriorates the function of the knee joint. Magnetic Resonance Imaging (MRI) provides promising results for the early detection of knee osteoarthritis. Conventionally, the MR image segmentation for knee osteoarthritis is manually done...
Lung cancer or pulmonary cancer is one of a dangerous cancer threatening human life since a long time ago. Even though, a conventional surgery is widely accepted as a gold standard for this cancer treatment, however a new medical maneuver still be investigated to perform with this disease. In this paper, we trail a simulation of thermal ablation by using microwave energy at 2.45GHz, 30 Watts for 10...
The mechanism for the streamer-to-leader transition of a positive surface discharge in atmospheric air was studied from the viewpoint of gas heating in a discharge channel. In the experiment, a quartz glass having a conductive indium tin oxide (ITO) coated back-surface was used as an insulation material having a back electrode. The gas temperature change of an impulse surface discharge ranging from...
The robotic surgery, which is the one of the major robotic technology, has some problems that a surgeon checks vision and sound information thought the surgical process. In order to solve this limited information, the haptic function is necessary. But it requires much more information through various sensors to haptic realization. However, because of the special environment inside human body, it is...
A shift of paradigm in theory and practice of product design requires a review of existing technologies of decorative surface treatment in the direction of adaptation to changing system of formation. Aesthetic benefits of different surface treatment technologies have been revealed. Recommendations on the choice of technology of surfaces decoration considering specificity of art objects were proposed...
In order to investigate the effect of vermiculite with gravel on road runoff, we research the removal efficiency of road runoff pollutant with the combination of different sizes of gravel with vermiculite, through the indoor simulation experiment. The road runoff pollutant indexes include potential of hydrogen (pH), suspended solids (SS), biochemical oxygen demand after 5 days (BOD5), chemical oxygen...
Research carried out in our laboratory is devoted to new materials of electrodes for lithium ion batteries. This presentation focuses on anodic materials, especially on two examples, silicon and ruthenium nitride. In both cases, electrochemical properties and structural evolutions are correlated in order to optimize performances in terms of specific capacity, cyclability and rate capability.
The main trends in consumer electronics are increasing product performances and costs reduction. These trends lead to an ongoing integration on package level which leads to a decreasing size of the solder contacts. This goes along with a higher sensibility to thermal-mechanical stress and the immanent void formation due to electromigration (EM) effects in interfaces and bulk materials like solder...
Lead-based piezoceramics are currently the most widely used transduction material in power ultrasonic applications. Directives such as the Restriction of Hazardous Substances (RoHS and RoHS2) regulate the sale of electrical and electronic equipment containing hazardous substances, such as lead, entering the European marketplace. However, lead-based piezoceramics have been exempt due to the lack of...
A double-layer W/Bi sheet is proposed for a X-ray radiation protection at the energy range of 70 keV to 90 keV. Comparison of X-ray transmission intensity between simulation and measurement results is presented. Transmission intensity of X-rays with various incident angles is observed. This designed W/Bi sheet, only 0.14 mm thick, provides the same X-ray protection properties as the standard 0.50...
Electronic assembly technology is in the transition from traditional tin-lead to lead-free. In comparison with Sn-Pb solders, high melting point and poor wettability of the lead-free solders lead to great challenge in many aspects. It has been accepted that inert N2 atmosphere can improve the wettability and reliablity of solder joints. The focus of this study is to investigate the reliability of...
A novel SiC doped SAC305 composite solder was developed by mechanically mixing various amount of the SiC whiskers with Sn-3.0Ag-0.5Cu solder paste. The effect of SiC whiskers addition on microstructure, microhardness and wettability of the composite solders was investigated. It was found that the eutectic structure was refined in the composite solder, and both of the microhardness and wettability...
In this paper, the recent two years of failure analysis cases of our laboratory are screened and some of them are displayed, they are mostly selected with a relation to the influence of temperature and humidity. To illustrate the typical and common failure phenomenon, plastic packaging products are focused. The main failure mode of these failed products include package delaminations, solder abnormality,...
Since the 50Sn32Pb18Cd eutectic solder was melted at 145 °C which is lower than the melting point of 63Sn37Pb solder (183 °C), it was selected as the interconnection joint to create a temperature gradient to avoid the former nearby 63Sn37Pb joint re-melted during the components assembly process. The tensile testing and the microstructure analysis were carried out on 50Sn32Pb18Cd eutectic solder to...
Lead-free solder alloys are more easily oxygenized and have poor wettability compared to traditional Sn-Pb solder alloys, which affects solder joints reliability. Ar is the most plentiful rare inert gas. It has been accepted that, in Ar atmosphere, the oxidation of lead-free solder joints can be prevented and the wettability of lead-free solder joints can be improved. To date, however, few systemic...
Sn-3.5Ag nanosolder in tiny sizes can provide a practical way to solve the high soldering temperature problem of lead-free solder alloy in fine pitch interconnectivity owing to the unique nanosize effect and meantime stand a higher working temperature just as the bulk material after welding. In this paper, a simple approach to synthesis Sn-3.5Ag nanoparticles by chemical reduction at room temperature...
This study aimed to highlight the use of Geographic Information Systems (GIS) and Remote Sensing (RS) techniques in studying land cover and land use in the city of Dibba-Al Fujairah during the years (1995, 2006, and 2010). The importance of this study was in determining the changes that have occurred in land cover and land use in the city generally, and in the areas of high population density particularly...
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