نتایج جستجو برای: terrestrial radiation
تعداد نتایج: 271787 فیلتر نتایج به سال:
The kNN method of combining a terrestrial forest inventory with remote sensing image analysis is applied in mountainous terrain. This poses problems of radiometrictopographic normalization, which are addressed in this paper. The SCS (sun-canopy-sensor) method, extended for including diffuse sky radiation, is found to be particularly suited for this. Estimating parameters of radiometric-topograp...
THz continuum spectral photometry has new and unique applications in different civil and military areas presenting a number of distinctive advantages on the well known microwaves or midto near-infrared technologies. THz sensing is essential to investigate the emission mechanisms by high energy particle acceleration processes. Technical challenges appear to diagnose radiation produced by solar f...
The paper analyzes the electromagnetic (EM) radiofrequency (RF) radiation hazards onboard a ship arising from shipboard radiocommunication and navigation equipment. EM field effect on personnel and equipment can be harmful if field levels exceed the threshold values. These fields need to be controlled for proper protection. Ships are equipped with lots of EM RF radiation sources with different ...
Effects of radiation on electronic circuits used in extra-terrestrial applications and radiation prone environments need to be corrected. Since FPGAs offer flexibility, the effects of radiation on them need to be studied and robust methods of fault tolerance need to be devised. In this paper a new fault-tolerant design strategy has been presented. This strategy exploits the relation between cha...
In 2006, the Joint Research Centre of the European Commission launched a project to map radon at the European level, as part of a planned European Atlas of Natural Radiation. It started with a map of indoor radon concentrations. As of May 2014, this map includes data from 24 countries, covering a fair part of Europe. Next, a European map of geogenic radon, intended to show 'what earth delivers'...
15 Living on emerged land raises several problems: water may be rare or absent, implying (1) that mineral nutrition is more or less impaired, (2) radiation (mainly toxic UV-rays) is not filtered out and (3) strong fluctuations of temperature are not prevented. In spite of those adversities, Precambrian land was colonized by phototrophic microorganisms, probably prokaryotes1, and multicellular t...
The Japanese mudskipper (Periophthalmus modestus), an amphibious fish that possesses many respiratory and locomotive specializations for sojourns onto land, was used as a model to study how changing atmospheric oxygen concentrations during the middle and late Paleozoic Era (400-250 million years ago) may have influenced the emergence and subsequent radiation of the first tetrapods. The effects ...
The ultimate goal of terrestrial planet-finding missions is not only to discover terrestrial exoplanets inside the habitable zone (HZ) of their host stars but also to address the major question as to whether life may have evolved on a habitable Earth-like exoplanet outside our Solar System. We note that the chemical evolution that finally led to the origin of life on Earth must be studied if we...
We propose radiation-hardened flip-flops (FFs) based on the adaptive coupling FF (ACFF) with low dynamic power and short delay overheads in a 65 nm Fully Depleted Silicon On Insulator (FDSOI) process. We designed four FFs composed of the master latch with PMOS pass-transistors to reduce delay time overheads and the slave latch with stacked transistors for high soft-error tolerance. We evaluated...
Neutron star radii are primarily determined by the pressure of isospin asymmetric matter which is proportional to the slope of the nuclear symmetry energy. Available terrestrial laboratory data on the isospin diffusion in heavy-ion reactions at intermediate energies constrain the slope of the symmetry energy. Using this constraint, we show that the radius (radiation radius) of a 1.4 solar mass ...
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