An analytic explanation of the spatial resolution in thermoacoustic or photoacoustic reconstruction is presented. Three types of specific recording geometries, including spherical, planar, and cylindrical surface, as well as other general cases, are investigated. Analytic expressions of the point-spread functions (PSF's), as a function of the bandwidth of the measurement system and the finite s...

The problems caused by miniaturization of the goniometer are discussed from the viewpoint of the stress error caused by mis-setting of the specimen and misalignment of the collimator and detector for the Q assembly X-ray stress analyzer using a position sensitive detector. The stress errors were calculated using a model and a simulation method. It was found that they tend to increase with the d...

A method is proposed to take a step towards detecting children in home videos. This method builds on a method for detecting children in frontal images that uses the relation between the iris size and the head size. In the proposed method, a slightly adapted ellipse Hough transformations is used that favors circles. From this research can be concluded that the method is certainly a step in the r...

The VIRGO Central Interferometer (CITF) is a short suspended interferometer operated with the central area elements of the VIRGO detector. The main motivation behind the CITF is to allow the integration and debugging of a large part of the subsystems of VIRGO while the construction of the long arms of the antenna is being completed. This will permit a faster commissioning of the full-size anten...

Two versions of a new high-resolution x-ray computed tomography system are being developed to screen mutagenized mice in the Oak Ridge National Laboratory Mammalian Genetics Research Facility. The first prototype employs a single-pixel cadmium zinc telluride detector with a pinhole collimator operating in pulse counting mode. The second version employs a phosphor screen/CCD detector operating i...

A framing camera incorporating an ultra high resolution CCD detector array comprised of 9,216 x 9,216 pixels is discussed. The detector array measures 8 x 8 centimeters and has been scaled to be fabricated in one piece on a 5inch diameter silicon wafer. Pixel size is 8.75 x 8.75 microns which gives 57 lp/mm resolution. The detector array features a two frame per second readout capability which ...

The instantaneous transition rate of an arbitrarily accelerated Unruh-DeWitt particle detector on four-dimensional Minkowski space is ill defined without regularisation. We show that Schlicht’s regularisation as the zero-size limit of a Lorentz-function spatial profile yields a manifestly well-defined transition rate with physically reasonable asymptotic properties. In the special case of stati...

KASCADE-Grande, located at Forschungszentrum Karlsruhe, is a multi-detector experiment for the measurement of extensive air showers induced by primary cosmic rays in the energy range of 10 14 − 10 18 eV. With its 0.5 km large field detector, in combination with the muon detectors of the KASCADE array, it allows the reconstruction of both the total electron and muon numbers, which are important ...

We present a new method for obstacle and pedestrian detection with lower computation complexity and higher detection performance on a small target. By calculating stereo disparity according to the road parameters, our system efficiently detects objects above the ground. Experiments on over 10,000 images captured in urban areas demonstrate our method’s effectiveness. We also propose a multi-scal...

Using a model and a simulation method, the problems caused by miniaturization of goniometers are discussed from the viewpoint of the stress error caused by systematic errors including the mis-setting of the specimen and the misalignments of the collimator and detector of the Ψ assembly X-ray stress analyzer with a position sensitive detector. As a concluion, it was found that stress errors incr...