The present invention relates to a method for evaluating the thermal expansion properties of a titania-containing glass body. On the basis of measured values, obtained at a certain temperature, for a physical parameter that changes depending on the titania concentration and a physical parameter that changes depending on the fictive temperature, the thermal expansion coefficient of the titania-containing silica glass body and the slope of the thermal expansion coefficient are calculated using a linear relational expression represented by a plurality of physical properties. The thermal expansion properties of the titania-containing silica glass body are evaluated on the basis of the calculated thermal expansion coefficient and thermal expansion coefficient slope.

A system for monitoring vital signs includes: an imaging device for acquiring video image files of a living individual; a data analysis system including a processor and memory; a computer program running in the data analysis system to automatically analyze the video images, autonomously identify an area in the images where periodic movements associated with a selected vital sign may be detected and quantified; and, an interface that outputs an electrical signal corresponding to the waveform of the selected vital sign. The system may include a Graphical User Interface, which may display a visual graph of the waveform and a single video frame or a video stream of the individual.

An apparatus and a method are provided for detecting one or more objects under a surface of a water body. The method includes transmitting one or more ultrasonic waves into the water body according to a transmit beam pattern. The method further includes determining a bottom characteristic of a bottom of the water body and dynamically adjusting the transmit beam pattern, based on the bottom characteristic of the water body.

To provide a method for evaluating a corroded part, the method making it possible to specify only a waveform reflected by a corroded part and to evaluate the waveform. When a transmission unit (2) is moved on the surface of a metal pipe (60) and the distance between a corroded part (5) and the transmission unit (2) is changed, only a waveform portion A of ultrasonic waves reflected by the corroded part (5) moves toward the left or right along an X axis, and only the intensity of a noise waveform portion B included in a received wave changes upward or downward along a Y axis, which makes it possible to separate the waveform portion A and the noise waveform portion B of a longitudinal-wave surface wave reflected by the corroded part (5) and evaluate the waveform portion A in detail.

Provided are: an ultrasound probe with excellent characteristic stability; and ultrasound equipment that uses the ultrasound probe. The ultrasound probe has an ultrasonic transmitting and receiving element provided with a substrate, an insulating film formed on the substrate, a cavity formed between the substrate and the insulating film, and a pair of electrodes disposed parallel to the substrate so as to sandwich the cavity. The ultrasound probe is characterized in that the ultrasonic transmitting and receiving element has a beam part with a multilayer structure formed by laminating films made of materials different in stress, the beam part being disposed on the electrode distant from the substrate out of the pair of electrodes, and the beam part is formed by laminating a film that applies tensile stress and a film that applies compressive stress.

Kits, apparatuses, and methods are provided for measuring acoustic properties of a surface. In an implementation, a kit may be provided. The kit may comprise an elongated pin; a tube having first and second ends, the tube having at least one pair of diametrically opposing holes, the at least one pair of diametrically opposing holes operable to support the elongated pin therethrough; a mass adapted to be received through the first and second ends of the tube; wherein placement of the elongated pin through a first pair of the at least one pair of diametrically opposing holes may prevent movement of the mass through the tube; and wherein removal of the elongated pin through the first pair of the at least one pair of diametrically opposing holes may allow passage of the mass through the tube.

A method and system for cement evaluation. The method may include disposing an acoustic logging tool into a pipe string that is disposed in a first casing of a wellbore, transmitting an acoustic wave at a first location within the wellbore from an acoustic source disposed on the acoustic logging tool, and recording one or more acoustic signals with one or more receivers on the acoustic logging tool at the first location. The method may further include performing a multichannel multimode dispersion analysis of the one or more acoustic signals, extracting one or more fluid modes propagating in the first casing from the dispersion analysis, extracting one or more pseudo-lamb waves propagating in the first casing from the dispersion analysis, extracting one or more pseudo-SH-plate waves propagating in the first casing from the dispersion analysis, and identifying a bonding condition between the first casing and a cement.

A pottery shard analyzer may determine one or more characteristics of an unidentified pottery shard. A vibration injector may cause the unidentified pottery shard to vibrate with a vibration signature that is dependent on the one or more characteristics of the unidentified pottery shard. A vibration detector may detect and extract a vibration signature from the vibration of the unidentified pottery shard caused by the vibration injector. A vibration signature comparator may: compare the detected vibration signature of the unidentified pottery shard with vibration signatures of multiple identified pottery shards having one or more known characteristics; and flag one or more of the identified pottery shards that have vibration signatures that are similar to the vibration signature of the unidentified pottery shard.

A control apparatus for rotating device includes a plurality information sensors and a controller. The information sensors are coupled to the rotating device for sensing temperature information, acoustic information and vibration information. The controller receives the temperature information, the acoustic information and the vibration information at a plurality of consecutive sampling time points to respectively obtain a plurality of sampled temperature values, a plurality of sampled noise values, and a plurality of sampled vibration values, during a time period. The controller generates a plurality of status signals corresponding to the sampling time points according to the sampled temperature values, the sampled noise values and the sampled vibration values. The controller generates a control signal according to the status signals, and transports the control signal to control an operation of the rotating device.

Disclosed are a device and a method for testing impedance characteristic and expansion performance of a sound absorption material. The device includes a first cavity and a second cavity which are both sealed. The first cavity is communicated with the second cavity through a slit channel. The second cavity is used for placing a sound absorption material therein. The device further includes a sound excitation source whose sounding face is located in the first cavity and used to provide a testing sound pressure. The device further includes two sound pickup sensors whose sound pickup surfaces are respectively arranged in the first cavity and the second cavity and respectively used to detect sound pressure in the first cavity and the second cavity. The device further includes a material for enclosing the first cavity and the second cavity is a hard sound insulation material.