Because of the secretive and stealthy nature of the work, not too many people know what's really involved in being a sniper, so we went straight to the source: We interviewed a former U.S. Army Ranger sniper to get the inside information. In the next few sections, we'll go over tool...
2025; Hooge et al.,n.d.; Niehorster et al.,2025). The articles are aimed at individuals who are (one of) the first in their group, company, or research field to use eye tracking, with a focus on all the decisions one may make in the context of an eye-tracking...
Photo: A concave lens makes parallel light rays diverge (spread out) so that they appear to come from a point behind the lens—the focal point. The distance from the center of the lens to the focal point is, again, the focal length of the lens. However, in this case, since the ...
Indeed, if a hidden variable theory is in operation, then it governs the whole universe and every process within it, including any deterministic process used to set up the experiment. Since 1982, physicists have performed many Bell tests. Indeed, they have become routine in...
Monoculars use a lens and prism system to magnify an image for the user. They are great for beginner stargazers due to their simple operation: Point your monocular at your subject, and look through it. Operating monoculars with higher magnification requires atripodto keep the view from wobbling...
That’s why it’s the second infection that health officials worry about. People tend to get only mildly sick or not sick at all after their first dengue infection, and for some reason, they hardly ever get sick on their third or fourth. The worst, life-threatening cases of dengue, the...
In a rotating machine, the relative motion of the stator and rotor is central to the machine’s operation. Electromagnetic problems involving bodies in relative motion are not trivial — in fact, over a hundred years ago, questions about this topic sparked the development of the theory of relat...
The first step in producing the subject rankings was to create the total universe of schools that could be ranked in each field. Depending on the subject, the number of universities ranked ranged from a low of 125 in marine and freshwater biology to a high of 1,508 in chemistry (see tabl...
Modeling Heat Transfer in Moist Air Humidified air not only affects human comfort, but also conditions the sustainability of buildings and the operation of electronic devices. This makes accounting for the presence of moisture critical when modeling heat transfer and phase change in ambient air surroun...
"When you use your gear, it's going to get dirty..." When stored in your camera bag or on your shelf, judicious use of front and rear lens caps will help keep your optics clean. But, when you use your gear, it's going to get dirty. This cannot be avoided. Your lenses will be...