نتایج جستجو برای: passive detectors
تعداد نتایج: 103230 فیلتر نتایج به سال:
abstract background: in vivo measurements of applied dose during radiotherapy treatment, is important to ensure accurate dose delivery to patients. uncertainty in dose delivery should fall within ±5% of the prescribed dose as recommended by icru. assessment of dose for radiotherapy applications performed with various types of detectors. in this study, semiconductor diodes were used which have s...
Space radiation is known to be key hazard of manned space mission. To estimate accurately radiation health risk detailed study of dose distribution inside human body by means of human phantom is conducted. In the space experiment MATROSHKA-R, the tissue-equivalent spherical phantom (32 kg mass, 35 cm diameter and 10 cm central spherical cave) made in Russia has been used on board the ISS for mo...
One of the key aspects of a detector material for space-borne hard X-ray and gamma-ray telescopes is the rate of prompt and delayed background events generated inside the material by charged and neutral particles striking the detector. These particles are Cosmic Rays, particles trapped in Earth’s magnetic field, and secondaries from Cosmic Ray interacting with the atmosphere and the spacecraft....
Facial manipulation enables facial expressions to be tampered with or identities replaced in videos. The fake videos are so realistic that they even difficult for human eyes distinguish. This poses a great threat social and public information security. A number of detectors have been proposed address this threat. However, previous studies shown the accuracy these is sensitive adversarial exampl...
Indoor radon concentrations were measured in dwellings of the Puglia region in Southern Italy using LR-115 passive detectors. The results show that the radon concentrations varied from 15 ± 2 to 2166 ± 133 Bq/m³ with a geometric mean of 114 Bq/m³ and a geometric standard deviation of 2.3. An analysis on the factors affecting radon concentration such as age of the dwellings, floors, and stories,...
We present bright galaxy number counts measured with linear detectors in the B, V , I, and K bands in two fields covering nearly 10 square degrees. All of our measurements are consistent with passive evolution models, and do not confirm the steep slope measured in other surveys at bright magnitudes. Throughout the range 16 < B < 19, our B−band counts are consistent with the “high normalization”...
The Silicon Tracking System (STS) serves the CBM experiment as a track reconstruction and momentum measurement detector. It is designed to provide high tracking efficiency and good momentum resolution for the charged particles produced in nuclear interactions in the target. As the multiplicities in central Au + Au collisions at FAIR energies reach 1000 charged particles a high granularity and l...
We have developed a passive 350 GHz (850 μm) video-camera to demonstrate lumped element kinetic inductance detectors (LEKIDs)--designed originally for far-infrared astronomy--as an option for general purpose terrestrial terahertz imaging applications. The camera currently operates at a quasi-video frame rate of 2 Hz with a noise equivalent temperature difference per frame of ∼0.1 K, which is cl...
A dense sensor network consisting of passive infrared motion detectors was developed and used to record human activity in hallways and rooms in a large campus building. Algorithms were developed that: (a) automatically determine the topology of the network from the sensor data, so that manual mapping is not required, (b) automatically learn patterns of sensor readings in local spatial and tempo...
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