On the evening of 8 November 1895, ous potential applicability to medical diWilhelm Conrad Rontgen immediately agnosis (2). recognized a remarkable new phenomOn_.zJJ~nu~ry, at his first and only enon. Fluorescent material lying on a public lecture on the discovery, Rontgen bench some distance from the cathode made an x-ray picture of the hand of Dr. ray tube with which he was experimentAlbert v...

Cognitive factors can mediate the tendency to create false memory. We explored the role of the two systems of reasoning in the production of false memories. Such difference can be assessed through the Cognitive Reflection Test (CRT), a measure of the propensity to reflect rather than producing an intuitive response. By the use of a DRM-like paradigm in a prose recognition memory task, we measur...

We have measured the sensitivity of the human visual system to chromatic stimuli of single chromatic frequency, ranging from 0.2 to 8.2 cycles/400 nm, and for eight initial phases from 0◦ to 315◦. The optimal phase curves obtained for two observers show a CSF-type shape, with minima at certain frequencies which did not appear in previous computational predictions. The implications of a value of...

Projection-based visual display systems are expected to be effective platforms for VR applications, in which the displayed images are generated by computer graphics using three-dimensional models of virtual worlds. However, these kinds of visual displays, as well as other kinds of fixed-screen-based displays such as various head-tracked displays (HTD) and conventional CRT displays, have not bee...

A new cylindrical low-mass central drift chamber has been constructed for the K + ! + experiment at BNL (E787). The chamber consists of 12 layers of axial wire cells and 6 layers of thin cathode-strip foils, four of which are supported by diierential gas pressure. The momentum resolution (RMS) for muons and pions in the range 150 to 250 MeV/c is found to be about 0.9%.

A technique was developed and tested for generating CRT image reproductions that matched the color-appearance of print originals. Five observers matched two scenes using a memory matching technique. Observers were able to produce accurate matches when originals and reproductions were viewed at the same white point. Observers matched the reproduction at 6500K to originals viewed at 9300K and at ...

Measuring the angles of muons and electrons in air showers is proposed as a method for studying the primary cosmic-ray mass composition near the knee of the cosmic-ray energy spectrum at a few 10 eV. Conventional tracking detectors at existing air shower arrays could serve this purpose, like the CRT detectors at the HEGRA array. When the average radial muon angles are examined as a function of ...

To begin this activity we will explore the properties of the wave function for an electron in a simple potential energy situation. Start the Quantum Tunneling program. Go to File/ Open in the top pull-down menu and open the file Step.txt. The top half of the program screen displays a potential energy diagram similar to the one in Figure 1. This potential energy diagram is very similar to the on...

A program to develop calibration services for colormeasuring instruments has been established recently at the National Institute of Standards and Technology (NIST) to address commercial and industrial needs for higher-accuracy measurements of displays. In particular, a reference spectroradiometer has been built with the goal of enabling measurements of displays with the smallest possible uncert...

In this study, we develop a semi-automatic system for tracking bubbles in image sequences. The vapor bubbles are generated on the surface of a heated tube in a boiling liquid. The images are taken with a speed of one thousand images per second via a high speed digital video camera. Due to some physical properties such as the testing liquid, the surface structure of the heated tube, temperature,...