Search results for "quantitative"
showing 10 items of 2409 documents
Enantioseparations with polysaccharide-based chiral stationary phases in HPLC. Application to the enantioselective evaluation of the biodegradability…
2023
The chiral nature of living systems has obvious implications for the biologically active compounds that interact with them. At the molecular level, chirality represents an intrinsic property of the essential building blocks of life, such as amino acids and sugars, and therefore, of peptides, proteins, enzymes, carbohydrates, nucleosides and a number of alkaloids and hormones. As a consequence, processes mediated by biological systems are stereochemistry-sensitive, and a pair of enantiomers can have different effects on living organisms. The scientific community has been studying the implications of chirality for life for more than a century. Today, it is still a topic of active research and…
UK QE reconsidered: the real economy effects of monetary policy inthe UK, 1990-2012 – an empirical analysis
2013
Empirical studies of so called ‘unconventional’ monetary policy – ‘Quantitative Easing’ or ‘Large Scale Asset Purchases’ - since the North Atlantic Financial Crisis of 2007-2009 in the United Kingdom and elsewhere have mainly focussed on the effect of policy on intermediate variables rather than the stated ultimate goal of such policies, boosting nominal demand and GDP growth. Secondly and relatedly they tend to focus on the crisis and post-crisis period, a time of extraordinary economic and financial dislocation, which creates counterfactual and attribution problems and fails to capture typical macroeconomic lag dynamics. Adopting the approach of Voutsinas and Werner (2010), and building o…
Comparer les performances des universités : les indicateurs quantitatifs en questions
2014
Une première partie s'attachera à expliciter la manière dont le processus de quantification se déploie dans les universités avec la LOLF puis la LRU : les indicateurs quantitatifs servent au ministère à mesurer la performance et définir des cibles à atteindre. Une seconde porte sur les indicateurs d'insertion professionnelle des sortants de master issus des enquêtes harmonisées, imposées depuis 2009 par le ministère aux établissements, à des fins de comparabilité des universités. Elle analyse " l'usage social " de ces indicateurs à partir du point de vue des personnels des observatoires universitaires. Enfin une dernière partie questionne la " validité scientifique " des indicateurs d'établ…
The effect of cooperative infrastructure fees on high-speed rail and airline competition
2021
Abstract This paper explores the effects of cooperation between rail and air infrastructures in setting per-passenger fees prior to competition among airlines and high-speed rail (HSR) in a transport network. It is shown that, for a sufficiently low degree of substitution, cooperation results in lower fees and greater HSR traffic than under competition. Besides, it leads to more connecting passengers. An empirical application allows for a quantitative assessment of cooperation. Gains to passengers and operators are sizeable when cooperation either involves all infrastructure managers or the rail and the hub airport managers. Welfare gains are in the range of 10.4–11.1%. Our contribution off…
Frequency domain control based on quantitative feedback theory for vibration suppression in structures equipped with magnetorheological dampers
2009
This is an author-created, un-copyedited version of an article accepted for publication in Smart Materials and Structures. IOP Publishing Ltd is not responsible for any errors or omissions in this version of the manuscript or any version derived from it. The definitive publisher authenticated version is available online at http://dx.doi.org/10.1088/0964-1726/18/9/095041 This paper addresses the problem of designing quantitative feedback theory (QFT) based controllers for the vibration reduction in a structure equipped with an MR damper. In this way, the controller is designed in the frequency domain and the natural frequencies of the structure can be directly accounted for in the process. T…
On a stochastic disease model with vaccination
2006
We propose a stochastic disease model where vaccination is included and such that the immunity isn’t permanent. The existence, uniqueness and positivity of the solution and the stability of disease free equilibrium is studied. The numerical simulation is done.
Elaboración un instrumento para conocer las características de la banda sonora de la programación infantil de televisión
2014
Television is one of the most important elements in the construction of the musical and audible reality of children and teenagers. It offers a selected and edited version of a musical environment, with an indisputable level of communicative and patrimonial influence. This paper is part of a research project that sets out to know what children are listening to in children’s television programming, in a sample of Latin American television coverage. The general objective has been to establish the parameters of everyday listening experiences and to create an instrument which is able to determine the objective elements of listening environments through their most notable medium: the soundtrack o…
Binomiālo frāžu veidi juridiskajos dokumentos
2017
Šajā Bakalaura darbā tiek izpētīts binomiālo frāžu pielietojums juridiskajos dokumentos. Ņemot vērā ka binomiālās frāzes tiek atzītas par neatņemamu un svarīgu juridiskās Angļu valodas aspektu, tuvāka šī temata izpēte tika pieņemta par cienīgu un aktuālu. Veiktā pētījuma teorētiskā daļa nodrošina teorētisko fonu attiecoties uz pētījuma jautājumiemun tēmām kā arī uz piemērotajām empīrisko metožu pētījumu analīzēm. Empīriskie pētījumi tika veikti ar primāro mērķi noskaidrot visus iespējamos binomiālo frāžu veidus balstoties uz to pielietojumu 50 dažādu žanru juridiskajos dokumentos. Šim nolūkam, komponentāla semantisko iezīmju analīze tika piemērota lai atbilstoši klasificētu binomus noteiktā…
Salikteņi rakstos par tirgvedību
2018
Rakstība angļu valodā vienmēr ir bijusi diezgan sarežģīta. Salikteņi ir vārdi, kam nav noteiktas rakstības sistēmas, tādēļ cilvēki tos raksta dažādi. Tādējādi šī darba mērķis ir analizēt salikteņus rakstos par tirgvedību. Kvalitatīvā un kvantitatīvā analīze tika izmantota kā pētniecības metode, un analīze tika veikta par salikteņiem, kas atrodami rakstos par tirgvedību vienā britu un vienā amerikāņu tirgvedības žurnālā. Šis pētījums ir parādījis, ka pārstāvētākais salikteņu veids ir īstie salikteņi (proper compounds) un izplatītākā salikteņu rakstība ir tos rakstīt kā vienu vārdu jeb “koprakstījumā” (solid compounds). Pētījuma rezultāti apstiprina, ka rakstos par tirgvedību izmantoto salikt…
Marketing Science and the Ivory Tower
1994
How much has quantitative “marketing science” contributed to the practice of marketing? In my view, not much. In this article, based on extensive consulting experience, it is argued that well-established quantitative techniques like econometric models and diffusion models have produced little of either practical or scientific value. Other quantitative techniques, such as conjoint analysis, have been more useful for marketing decision-makers. But what is needed is a more pluralistic culture, drawing on a range of complementary disciplines.