2,624 research outputs found
Prospects for improving the LHC W boson mass measurement with forward muons
No full textMeasurements of the W boson mass are planned by the ATLAS and CMS experiments, but for the time being, these may be unable to compete with the current world average precision of 15 MeV, due to uncertainties in the PDFs. We discuss the potential of a measurement by the LHCb experiment based on the charged lepton transverse momentum pTl spectrum in W→μν decays. The unique forward acceptance of LHCb means that the PDF uncertainties would be anti-correlated with those of pTl based measurements by ATLAS and CMS. We compute an average of ATLAS, CMS and LHCb measurements of mW from the pTl distribution. Considering PDF uncertainties, this average is a factor of 1.3 more precise than an average of ATLAS and CMS alone. Despite the relatively low rate of W production in LHCb, we estimate that with the Run-II dataset, a measurement could be performed with sufficient experimental precision to exploit this anti-correlation in PDF uncertainties. The modelling of the lepton-pair transverse momentum distribution in the neutral current Drell–Yan process could be a limiting factor of this measurement and will deserve further studies
Valmisruokapakkausjäte ja kotitalous : mikrotaloustieteellinen malli
No full textPro gradu -työ : Taloustieteen laitos, Helsingin yliopisto, 2006
How Much Do Your Patients Really Drink?
No full text Wine, Alcohol, and Oral Health, with Special Emphasis on Dental Erosion. J.H. Meurman and M. Vesterinen. Quintessence International 2000; 31: 729–733. </jats:p
LHCb trigger streams optimization
No full textThe LHCb experiment stores around 1011 collision events per year. A typical physics analysis deals with a final sample of up to 107 events. Event preselection algorithms (lines) are used for data reduction. Since the data are stored in a format that requires sequential access, the lines are grouped into several output file streams, in order to increase the efficiency of user analysis jobs that read these data. The scheme efficiency heavily depends on the stream composition. By putting similar lines together and balancing the stream sizes it is possible to reduce the overhead. We present a method for finding an optimal stream composition. The method is applied to a part of the LHCb data (Turbo stream) on the stage where it is prepared for user physics analysis. This results in an expected improvement of 15% in the speed of user analysis jobs, and will be applied on data to be recorded in 2017
Can early thinning and pruning lessen the impact of pine plantations on beetle and ant diversity in the Patagonian steppe?
No full textPine plantations are thought to negatively impact species diversity and to irreversibly modify arid zones. However, some studies have suggested that through the application of appropriate management practices, the negative impacts of plantations may be reduced. Our aim was to study the effects of early pruning and thinning on the ground-dwelling insects found in pine tree plantations in Patagonia. We compared the abundance, species richness and composition of the beetle and ant assemblages within 16-year-old pine stands (n = 10) subjected to early pruning and thinning (i.e. before canopy closure) against a steppe habitat exposed to sheep grazing (‘control’, n = 10). To sample ground-dwelling insects, we deployed nine pitfall traps per plot (100 m2) for a 10-day period. Vegetation cover and plant species richness were significantly lower in the plantations than in the steppe. We found that beetle species richness was reduced in the managed plantations in comparison to the steppe but abundance was higher. In turn, species composition in the plantations was different from that of the controls. Ant species richness was similar among habitats but abundance was lower in the plantations. We conclude that, contrary to our expectations, management practices that lead to sparse plantations at early stages in the production cycle, do not offer a significant advantage in terms of reducing the impact of pines on ground-dwelling insects of Patagonia.EEA BarilocheFil: Corley, Juan Carlos. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Bariloche. Grupo de Ecología de Poblaciones de Insectos; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Villacide, Jose Maria. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Bariloche. Grupo de Ecología de Poblaciones de Insectos; ArgentinaFil: Vesterinen, M. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Bariloche. Grupo de Ecología de Poblaciones de Insectos; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. University of Joensuu; Finlandi
Relative proportions of fatty acid from littoral macroinvertebrates and pelagic zooplankton in subarctic lakes in Finnish Lapland
No full textThis data contains fatty acid and amino acid contents and relative proportions of littoral and pelagic invertebrates in 8-9 subarctic lakes in Finnish Lapland. There are 23 littoral macroinvertebrate taxa measured, as well as two zooplankton taxa. There are also water quality parameters and geographic information about the studied lakes. Invertebrates were sampled for the fatty acid and amino acids between 15th - 25th August in 2017. Water quality samples were collected 2009-2013. Samples were collected with kick-net sampling or by vertical net tows. More detailed sampling methods and analyses are described in doi: 10.1002/lno.11563
Fatty acid content of littoral macroinvertebrates and pelagic zooplankton in subarctic lakes in Finnish Lapland
No full textThis data contains fatty acid and amino acid contents and relative proportions of littoral and pelagic invertebrates in 8-9 subarctic lakes in Finnish Lapland. There are 23 littoral macroinvertebrate taxa measured, as well as two zooplankton taxa. There are also water quality parameters and geographic information about the studied lakes. Invertebrates were sampled for the fatty acid and amino acids between 15th - 25th August in 2017. Water quality samples were collected 2009-2013. Samples were collected with kick-net sampling or by vertical net tows. More detailed sampling methods and analyses are described in doi: 10.1002/lno.11563
Amino acid content of littoral macroinvertebrates and pelagic zooplankton in subarctic lakes in Finnish Lapland
No full textThis data contains fatty acid and amino acid contents and relative proportions of littoral and pelagic invertebrates in 8-9 subarctic lakes in Finnish Lapland. There are 23 littoral macroinvertebrate taxa measured, as well as two zooplankton taxa. There are also water quality parameters and geographic information about the studied lakes. Invertebrates were sampled for the fatty acid and amino acids between 15th - 25th August in 2017. Water quality samples were collected 2009-2013. Samples were collected with kick-net sampling or by vertical net tows. More detailed sampling methods and analyses are described in doi: 10.1002/lno.11563
Data and R-scripts used in 10.1002/ece3.9538
No full textR-scripts used to produce the results and the data supporting the results of the paper: Kulha N, Ruokolainen K, Vesterinen EJ, Lamppu M, Klemola T, Sormunen JJ. 2022. Does environmental adaptation or dispersal history explain the geographical distribution of Ixodes ricinus and Ixodes persulcatus ticks in Finland?
DOI: 10.1002/ece3.9538
See the metadata for a more detailed description of the scripts and the dataset.</p
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