We report the first use of ultrasonic standing waves to achieve cell cycle phase synchronization in mammalian cells in a high-throughput and reagent-free manner. The acoustophoretic cell synchronization (ACS) device utilizes volume-dependent acoustic radiation force within a microchannel to selectively purify target cells of desired phase from an asynchronous mixture based on cell cycle-depende...

Ultrasonic pulse-echo methods are versatile, effective procedures for inspecting welds in steel structures. However, the ultrasonic methods conventionally used have two disadvantages: inspection must be performed manually by a skilled technician, and the signal obtained at the time of one inspection provides no “memory” to be used at the time of a later inspection. Our research involves the dev...

The Misonix BoneScalpel is a novel ultrasonic surgical device that cuts bone and spares soft tissues. This relative selectivity for bone ablation makes BoneScalpel ideally suited for spine applications where bone must be cut adjacent to dura and neural structures. Extensive clinical experience with this device confirms its safety and efficacy in spine surgery. The aim of this report is to descr...

Kymograph is a device to record the magnitude of physiological variables, such as: muscle contraction. However, we observe some lacks of the conventional kymographs, such as: result’s visualisation and accuracy. Hence, we propose a computerized-kymograph which can automatically measure, record, and display graphical data of muscle contraction on the computer by using ultrasonic distance sensor....

The purpose of this research is to develop an interactive device for environment recognition, which uses senses other than vision. At present there is no interactive device with which a person who is visually handicapped can gain an intuitive impression of the external world. Our device, which we have named CyARM, has a mechanism that controls the motion of a visually impaired person's arm acco...

A unique sensing system is described using an ultrasonic transducer for measuring tree trunk diameters in the orchard. Trunk diameters were calculated from the time it took sound waves to travel from the transducer to the trunk and back to the sensor. The device was calibrated with objects ranging in diameter from 1.6 (0.63 inch) to 19.0 cm (7.5 inches). The distance between the transducer and ...

Ultrasonic imaging systems usually require an array of ultrasonic transducers for data acquisition on a wide area on top of an object under investigation. The goal of an imaging algorithm is the use of reflected ultrasound data to form a recognizable image. Conventional algorithms like SAFT are based on an inverse Huygens' principle and need therefore a dense measurement grid. This requires a b...

Both theoretical and experimental results on ultrasound transmission through perforated plates with two periodic arrays of subwavelength holes are presented. Multiple transmission peaks and dips can be achieved by a single perforated plate. The locations of the transmission peaks and dips can be tunned independently by the periodicities of the individual hole arrays. The locations of the transm...

In context awareness applications the locations of people, devices or objects are often required. Ultrasound technology enables high resolution position measurements indoors. A disadvantage of state-of-the-art ultrasonic systems is that several base stations are required to estimate a 3D position. Since fewer base stations leads to lower cost and easier setup, a novel method is presented that r...

The effect of ultrasound on the growth of M. aeruginosa confirmed to contain gas vacuoles and on a laboratory culture with no gas vacuoles was investigated. Both cultures were treated continuously for 9 d with an ultrasonic flow device. To evaluate the influence of ultrasound during the treatment, the chlorophyll-a concentration was measured daily. Furthermore, changes in culture characteristic...