Search results for "Tar"
showing 10 items of 25541 documents
Monte Karlo simulācijas tuvajā infrasarkanajā spektra diapazonā ādas mitruma novērtējumam
2015
Šajā darbā tika pētītas iespējas noteikt ādas mitrumu ar inversās Monte Karlo metodes palīdzību. Ūdens absorbcijas spektrs tuvajā infrasarkanajā spektra diapazonā (900 nm – 1700 nm) ir ar izteiktiem maksimumiem un minimumiem, tāpēc šis spektra diapazons varētu tikt izmantots ūdens tilpuma daļas novērtējumam ādā ar optiskām metodēm. Tika izveidoti trīs dažādi ādas modeļi, ar kuriem tika veiktas Monte Karlo simulācijas un pārbaudīta optisko parametru izmaiņu ietekme uz spektra intensitāti un formu. Simulētie spektri tika salīdzināti ar eksperimentāli iegūtajiem ādas difūzi atstarotās gaismas spektriem ar mērķi noteikt ādas mitrumu katrā eksperimenta gadījumā. Lai to panāktu, tika izveidota in…
RUOLO DI β-GLUCOSIDASI ISOLATA D’ATTIVITÀ ENZIMATICHE COLLATERALI SUL RILASCIO DI TRANS-RESVERATROLO NEI VINI
2007
A 2600-year record of past polycyclic aromatic hydrocarbons (PAHs) deposition at Holzmaar (Eifel, Germany)
2014
Polycyclic aromatic hydrocarbons (PAHs) are a proxy for climate- and human-related historical fire activity which has rarely been used beyond 1800 AD. We explored the concentration and composition patterns of PAHs together with other proxies (charcoal, C, N, S, δ13C, δ15N, and δ34S) in a sediment core of Holzmaar as indicators of variations in climate and anthropogenic activity over the past 2600 years. The concentrations of pyrogenic PAHs remained low (< 500 ng g− 1) from the pre-Roman Iron Age (600 BC) until the first significant increases to ca. 1000–1800 ng g− 1 between 1700 and 1750 AD related to regional iron production. The highest increases in pyrogenic PAH concentrations occurred w…
Search for scalar leptoquarks in pp collisions at $\sqrt{s}$=13 TeV with the ATLAS experiment
2016
An inclusive search for a new-physics signature of lepton-jet resonances has been performed by the ATLAS experiment. Scalar leptoquarks, pair-produced in pp collisions at s √s = 13 TeV at the large hadron collider, have been considered. An integrated luminosity of 3.2 fb-1, corresponding to the full 2015 dataset was used. First (second) generation leptoquarks were sought in events with two electrons (muons) and two or more jets. The observed event yield in each channel is consistent with Standard Model background expectations. The observed (expected) lower limits on the leptoquark mass at 95% confidence level are 1100 and 1050 GeV (1160 and 1040 GeV) for first and second generation leptoqua…
Search for the Decay of the Higgs Boson to Charm Quarks with the ATLAS Experiment
2018
A direct search for the standard model Higgs boson decaying to a pair of charm quarks is presented. Associated production of the Higgs and Z bosons, in the decay mode ZH→ℓ+ℓ−c¯c is studied. A data set with an integrated luminosity of 36.1 fb−1 of pp collisions at √s=13TeV recorded by the ATLAS experiment at the LHC is used. The H→c¯c signature is identified using charm-tagging algorithms. The observed (expected) upper limit on σ(pp→ZH)×B(H→c¯c) is 2.7 (3.9+2.1−1.1) pb at the 95% confidence level for a Higgs boson mass of 125 GeV, while the standard model value is 26 fb.
Сборник статей Н. М. Коркунова, профессора Петербургскаго университета: 1877-1897
1898
Сборник всех правил и узаконений со всеми разъяснениями и дополнениями, о поступлении на службу вольноопределяющимися и охотниками в сухопутные войск…
1913
Отчетъ Общества взаимнаго вспомоществованія учащимъ и учившимъ въ начальныхъ народныхъ училищахъ Лифляндской губерніи за время съ І-го января по 31-о…
1905
Underground investigation of extensive air showers spectra at high energy range of cosmic rays and other research in the Pyhäsalmi mine
2020
Abstract High energy particles reaching the Earth’s atmosphere are known as cosmic rays. As a result of interactions with nuclei of air molecules, cosmic rays induce showers of secondary particles, which can be divided into 3 components: electromagnetic, hadronic and muonic components. The Experiment with Multi Muon Array (EMMA), located at the depth of 75 m in the Pyhäsalmi mine in Finland, investigates the muonic component of the Extensive Air Showers (EAS) to deduce the direction, energy, and the mass of the primary cosmic ray particles. In this paper we give a concise description and methodology used by EMMA followed by a brief review of the C14 experiment. Finally, we review the feasib…