Search results for "fire"
showing 10 items of 463 documents
On optimizing firewall performance in dynamic networks by invoking a novel swapping window-based paradigm
2018
Designing and implementing efficient firewall strategies in the age of the Internet of Things (IoT) is far from trivial. This is because, as time proceeds, an increasing number of devices will be connected, accessed and controlled on the Internet. Additionally, an everincreasingly amount of sensitive information will be stored on various networks. A good and efficient firewall strategy will attempt to secure this information, and to also manage the large amount of inevitable network traffic that these devices create. The goal of this paper is to propose a framework for designing optimized firewalls for the IoT. This paper deals with two fundamental challenges/problems encountered in such firewalls…
Deuteron Compton Scattering
1995
We have calculated deuteron Compton scattering below pion production threshold using different realistic NN potential models and explicit meson exchange current contributions. The gauge conditions for the current and two photon operators have been exploited extensively, so that our model fulfills the low energy theorems. Rescattering, meson exchange and nucleon substructure contributions are studied and compared with a previous calculation and recent experimental data.
Toxic Effects of Organometallic Compounds towards Marine Biota
2002
Organometallic derivatives are compounds containing a direct σ or π carbon metal linkage. Furthermore, the concept of the metallic atom must be extended to all the elements that are less negative than the carbon atom. As a consequence, taking into account all elements that are less negative than carbon and the number of existing organic compounds, it is possible to synthesize millions of organometallic derivatives. Several of these are extensively used in organic syntheses; others may find application in agriculture and in many other fields as pesticides, fire retardants, wood preservatives, antifouling agents, etc. In general, the organic derivatives of the metals are more toxic than the p…
2. tipa diabēta pacientu un ārstu tuvināšana, lietojot Firbase datubāzi, veicinot attālinātu pārraudzību
2018
Cukura diabēts ir viena no visizplatītākajām slimībām pasaulē, kuras apmēri strauji turpina augt. Eiropā ar diabētu slimo vairāk kā 60 miljoni cilvēku, savukārt Latvijā 2016. gadā slimnieku skaits sasniedza gandrīz 90 000 cilvēku. Otrā tipa diabēts ir populārākais diabēta tips, skarot 90-95% slimnieku. Balstoties uz neseniem pētījumiem, ir pierādīts, ka efektīva atveseļošanās metode ir intervālu treniņi. Darba autors iesaistījās projektā “Staigā Vesels” un izstrādāja attālinātas pārraudzības sistēmu ārstiem un pacientiem, palīdzot aprobēt hipotēzi, ka regulāra un pārraudzīta intervālu treniņu veikšana uzlabo pacientu veselību. Galvenais darba mērķis ir izstrādāt sistēmu ārstiem un datu māko…
Prehistoric land use at an archaeological hot-spot (the rock art park of Campo Lameiro, NW Spain) inferred from charcoal, synanthropic pollen and non…
2013
Pollen, non-pollen palynomorphs and charcoal from a colluvial soil surrounded by prehistoric petroglyphs (Campo Lameiro, NW Spain) were studied in order to assess the nature of human activities and their impact on Holocene vegetation patterns. Several phases of anthropogenic impact were observed. (i) Between 7.6 and 6.5 ka cal BP, synanthropic taxa (Urtica dioica type, Plantago lanceolata type) and coprophilous fungi (e.g. Sporormiella-type) are indicative of early (pre-agricultural) creation of small patches of pasture using fire, possibly for incipient animal husbandry or as part of a deliberate strategy to improve game availability. Such activities only had a minor effect on the deciduou…
The fire salamander, Salamandra salamandra L., in central Europe: subspecies distribution and intergradation
1992
AbstractAllozyme electrophoresis of 14 loci provided information on the distribution of the two central European subspecies of the fire salamander, Salamandra salamandra salamandra (dotted taxon) and S.s.terrestris (striped taxon), along an east-west-transect in Germany. 2183 larvae from 48 populations situated in 14 mountain ranges were studies. A broad (about 140 km wide) zone of intergradition between the two forms is described, ranging from the Hunsrück Mountains in the west to the Spessart in the east. Within this hybrid zone the populations are panmictic. Focussing on the Rhenish Slate Mountains, the western border of the hybrid zone is described in detail. A comparison between allozy…
Measurement of trilinear gauge couplings in e(+)e(-) collisions at 161 GeV and 172 GeV
1998
Trilinear gauge boson couplings are measured using data taken by DELPHI at 161 GeV and 172 GeV, Values for WWV couplings (V = Z,gamma) are determined from a study of the reactions e(+)e(-) --> W+W- and e(+)e(-) --> We nu, using differential distributions from the WW final state in which one W decays hadronically and the other leptonically, and total cross,section data from other channels, Limits are also derived on neutral ZV gamma couplings from an analysis of the reaction e(+)e(-) --> gamma + invisible particles. (C) 1998 Elsevier Science B.V.
Great tit (Parus major) breeding in fire-prone oak woods: differential effects of post-fire conditions on reproductive stages
2011
Wildfires negatively affect the overall reproductive success of several woodland avian species, but there is scarce information about which stages of the nesting cycle are specifically affected. We conducted a 3-year study to identify the effects of fire on the reproductive parameters of the great tit (Parus major) and the survival of its nests at different stages of the nesting cycle. We recorded the occupancy rate, clutch and brood size, hatching, fledging and nesting success in nest boxes placed on study plots with different post-fire age. By examining the post-fire succession, we analysed the survival of eggs and nestlings under predation risks. As the forest matured after a wildfire, …
Structure, mechanism and regulation of peroxiredoxins.
2003
Peroxiredoxins (Prxs) are a ubiquitous family of antioxidant enzymes that also control cytokine-induced peroxide levels which mediate signal transduction in mammalian cells. Prxs can be regulated by changes to phosphorylation, redox and possibly oligomerization states. Prxs are divided into three classes: typical 2-Cys Prxs; atypical 2-Cys Prxs; and 1-Cys Prxs. All Prxs share the same basic catalytic mechanism, in which an active-site cysteine (the peroxidatic cysteine) is oxidized to a sulfenic acid by the peroxide substrate. The recycling of the sulfenic acid back to a thiol is what distinguishes the three enzyme classes. Using crystal structures, a detailed catalytic cycle has been deriv…
Measurement of Z-pair production in e(+)e(-) collisions and constraints on anomalous neutral gauge couplings
2009
The ZZ production cross section is measured from a data sample corresponding to a total integrated luminosity of 452 pb−1, collected by the ALEPH experiment at LEP at centre-of-mass energies from 192 to 209 GeV. Individual cross sections, extracted at six centre-of-mass energies, are found to be in agreement with Standard Model calculations. The results are used to set limits on anomalous neutral gauge couplings. The ZZ production cross section is measured from a data sample corresponding to a total integrated luminosity of 452 pb−1 , collected by the ALEPH experiment at LEP at centre-of-mass energies from 192 to 209 GeV. Individual cross sections, extracted at six centre-of-mass energies, …