High-frequency (HF) surface wave radars provide a unique capability to detect targets far beyond the conventional microwave radar coverage. This capability also could contribute to the development and improvement of Tsunami Early Warning Systems. This paper presents the system design and introduces the key signal processing methodologies that enable the HF radar to provide early warning of the ...

gives a sufficient and reasonable explanation, we reject the submission without penalties. However, if the author does not respond, the explanation is unsatisfactory, or the author admits guilt, we will reject the submission with penalties, for example, sending a letter of warning, imposing a ban on submissions to KJFM for one or two years, or informing the author’s superior about the misconduc...

This study evaluated the efficacy of active versus passive warnings at uncontrolled pedestrian (ped) crosswalks (Xwalks), by comparing how these two warnings types influenced behavior of drivers approaching such Xwalks. Vehicle-Xwalk interactions were observed at 18 sites with passive, continuously flashing, or ped-activated warnings, yielding 7,305 no ped present and 596 ped present interactio...

background: one of the important aspects of hospital preparedness in disasters is its rapid early warning system. in this study, the activation of early warning system was evaluated under the monitoring of disasters workgroup of the ministry of health based on the national program of “hospitals preparedness in disasters” in shahid motahari hospital.  materials and methods: the sample was compos...

Evolution of conspicuous signals may be constrained if animal coloration has nonsignaling as well as signaling functions. In aposematic wood tiger moth (Parasemia plantaginis) larvae, the size of a warning signal (orange patch on black body) varies phenotypically and genetically. Although a large warning signal is favored as an antipredator defense, we hypothesized that thermoregulation may con...

background: all recent accident models emphasis on multi causality of accidents. the suggested models emphasized on human roles in accident occurrence. the results of recent decade's studies have shown that the main causes of accidents are human and his/her unsafe acts. nowadays, application of warning signs is an important way to decrease unsafe acts . methods: in this study, the unsafe acts o...

After a transmission line fails, quickly and accurately find the fault point deal with it, which is of great significance to maintaining normal operation power system. Aiming at problems low accuracy traditional traveling wave location methods many affected factors, this paper relies on distributed monitoring points arranged lines study improve lines. First, when signal that moves both ends wil...