Search results for "ASTER"
showing 10 items of 2223 documents
Differential branching fraction and angular analysis of the decay $B^{0} \to K^{*0} \mu^{+}\mu^{-}$
2013
The angular distribution and differential branching fraction of the decay B-0 -> K*(0)mu(+)mu(-) are studied using a data sample, collected by the LHCb experiment in pp collisions at root s = 7 TeV, corresponding to an integrated luminosity of 1.0 fb(-1). Several angular observables are measured in bins of the dimuon invariant mass squared, q(2). A first measurement of the zero-crossing point of the forward-backward asymmetry of the dimuon system is also presented. The zero-crossing point is measured to be q(0)(2) = 4.9 +/- 0.9 GeV2/c(4), where the uncertainty is the sum of statistical and systematic uncertainties. The results are consistent with the Standard Model predictions.
Trīs veidu k-vidējo klasterizācijas algoritmu teorētiskais pamatojums
2022
Bakalaura darba mērķis ir izpētīt K-vidējo klasterizāciju metodes. Darbs ir balstīts uz trīs metodēm, tas ir: klasiskā K-vidējo klasterizācija, nestriktā C-vidējo klasterizācija, un C-vidējo klasterizācija nestriktas ekvivalences gadījumā, kas ir C-vidējo speciālgadījums. Apskatītājām metodēm tiek aprakstītas tas darbošanās algoritmi, kā arī tiek sniegts ieskats nestrikto attiecību teorijā. K-vidējo un C-vidējo algoritmi tiek programmēti Python valodā un tiek uztaisītas simulācijas algoritmu iterāciju skaita salīdzināšanai.
Nestriktās klasterizācijas algoritmi un to lietojumi tekstu apstrādē
2019
Darbs ir veltīts klasiskās un nestriktās klasterizācijas algoritmiem, kuri tika pielietoti teksta klasterizācijai. Tiek apskatīti divi klasiskās klasterizācijas algoritmi, kas ir KM un hierarhiskās klasterizācijas metodes, un divi nestriktas klasterizācijas algoritmi: FCM un FCMdd klasterizācijas. Klasterizācijas algoritmi tika izmantoti “BBC News” ziņu portāla rakstu klassifikācijai pa piecām tēmām: bizness, tehnoloģijas, izklaide, sports un politika. Tika analizēti un interpretēti skaitliskie rezultāti.
Geochemical constraints on volatile sources and subsurface conditions at Mount Martin, Mount Mageik, and Trident Volcanoes, Katmai Volcanic Cluster, …
2017
Abstract We use the chemical and isotopic composition of volcanic gases and steam condensate, in situ measurements of plume composition and remote measurements of SO2 flux to constrain volatile sources and characterize subvolcanic conditions at three persistently degassing and seismically active volcanoes within the Katmai Volcanic Cluster (KVC), Alaska: Mount Martin, Mount Mageik and Trident. In situ plume measurements of gas composition were collected at all three volcanoes using MultiGAS instruments to calculate gas ratios (e.g. CO2/H2S, SO2/H2S and H2O/H2S), and remote measurements of SO2 column density were collected from Mount Martin and Mount Mageik by ultraviolet spectrometer system…
New acetophenone glucosides isolated from extracts of Helichrysum italicum with antiinflammatory activity.
2001
Three new acetophenone glucosides (4-6), three known aglycons (1-3), and a benzo-gamma-pyrone glucoside (7) were isolated from the CH(2)Cl(2), EtOAc, and BuOH extracts from the aerial parts of Helichrysum italicum. All the compounds tested showed antiinflammatory activity in a 12-O-tetradecanoylphorbol 13-acetate (TPA)-induced mouse ear edema test, and the ID(50) value of compound 2, the most active compound, was determined.
Cytotoxic Activity of Some Natural and Synthetic ent-Kauranes
2007
Atractyligenin (1) and several synthetic derivatives were tested and found to be active against tumor cell replication. Compound 1 was readily converted to the 2,15-diketo (3) or 15-keto (4) derivatives, which contain an alpha,beta-unsaturated ketone. Compounds 3 and 4 showed significant cytotoxic activity against all six tested cancer cell lines and were most potent against 1A9 ovarian cancer cells with EC50 values of 0.2 and 0.3 microM, respectively. These two 1-analogues are promising lead compounds for further investigation.
The Prague Roots of Polish Benedictines (in the 20th Century)
2020
As a conseąuence of the nineteenth-century dissolution of religious orders, no małe Benedictine monastery survived in Poland. Renewal of religious life was undertaken by Father Klemens Dąbrowski (1875 -1953), from 1909 a monk of the Emaus Monastery in Prague. He found a depth of spiritual life there. During the Great War he was involved in helping Polish refugees. After its conclusion, he decided to return to Poland. In the years 1919 -1923 he attempted to create a Polish foundation based on the monastery in Prague (at the Holy Cross and in Tomaszów Mazowiecki). Left without help, he did not realize his plans there. His prior, Father Arnośt Vykoukal, offered help, but he did not have the re…
Governance through Economic Paradigms: Addressing Climate Change by Accounting for Health
2016
"Climate change is a major challenge for sustainable development, impacting human health, wellbeing, security, and livelihoods. While the post-2015 development agenda sets out action on climate change as one of the Sustainable Development Goals, there is little provision on how this can be achieved in tandem with the desired economic progress and the required improvements in health and wellbeing. This paper examines synergies and tensions between the goals addressing climate change and economic progress. We identify reductionist approaches in economics, such as 'externalities', reliance on the metric of the Gross Domestic Product, positive discount rates, and short-term profit targets as so…
Communication Platform for Disaster Response
2016
The present research proposes an information platform for enhanced communication and information sharing in municipalities struck by disasters. Once a disaster happens, collecting and sharing information with and among citizens is the most important tasks for municipalities. However, empirical research of the Great East Japan Earthquake in 2011 revealed a marked lack of tools supporting municipal communication and data sharing activities at the initial stage. A smartphone and tablet based application was subsequently developed and evaluated in the field as a means of first response in future disasters. The application is based on the notion of frugality, which proved to be very useful in th…
Knowledge-driven multi-agent simulation engineering for assessing the effectiveness of disaster management plans
2020
Protecting humans from disasters has been an active mission of governments and experts through the definition of disaster management plans. Defining disaster response strategies is crucial in order to reduce the number of victims and the economic impact. In order to select which response plan is best suited to a specific disaster situation, these plans must be evaluated. However, such evaluation is limited by the high cost of exercises and the specificity of existing simulation models. The approach defended in this thesis combines techniques from Semantic Web and multi-agent simulation to evaluate disaster management response plans. It is composed of four steps : (1) modeling disaster manag…