Search results for "TIMI"
showing 10 items of 4651 documents
Can back-projection fully resolve polarity indeterminacy of independent component analysis in study of event-related potential?
2011
a b s t r a c t In the study of event-related potentials (ERPs) using independent component analysis (ICA), it is a traditional way to project the extracted ERP component back to electrodes for correcting its scaling (magnitude and polarity) indeterminacy. However, ICA tends to be locally optimized in practice, and then, the back-projection of a component estimated by the ICA can possibly not fully correct its polarity at every electrode. We demonstrate this phenomenon from the view of the theoretical analysis and numerical simulations and suggest checking and modifying the abnormal polarity of the projected component in the electrode field before further analysis. Moreover, when several co…
Justification of point electrode models in electrical impedance tomography
2011
The most accurate model for real-life electrical impedance tomography is the complete electrode model, which takes into account electrode shapes and (usually unknown) contact impedances at electrode-object interfaces. When the electrodes are small, however, it is tempting to formally replace them by point sources. This simplifies the model considerably and completely eliminates the effect of contact impedance. In this work we rigorously justify such a point electrode model for the important case of having difference measurements ("relative data") as data for the reconstruction problem. We do this by deriving the asymptotic limit of the complete model for vanishing electrode size. This is s…
Bilevel heat exchanger network synthesis with an interactive multi-objective optimization method
2012
Abstract Heat exchanger network synthesis (HENS) has been an active research area for more than 40 years because well-designed heat exchanger networks enable heat recovery in process industries in an energy- and cost-efficient manner. Due to ever increasing global competition and need to decrease the harmful effects done on the environment, there still is a continuous need to improve the heat exchanger networks and their synthesizing methods. In this work we present a HENS method that combines an interactive multi-objective optimization method with a simultaneous bilevel HENS method, where the bilevel part of the method is based on grouping of process streams and building aggregate streams …
Interpreting wind damage risk-how multifunctional forest management impacts standing timber at risk of wind felling
2022
AbstractLandscape multifunctionality, a widely accepted challenge for boreal forests, aims to simultaneously provide timber, non-timber ecosystem services, and shelter for biodiversity. However, multifunctionality requires the use of novel forest management regimes optimally combined over the landscape, and an increased share of sets asides. It remains unclear how this combination will shape stand vulnerability to wind disturbances and exposed timber volume. We combined forest growth simulations and multi-objective optimization to create alternative landscape level forest management scenarios. Management choices were restricted to 1) rotation forestry, 2) continuous cover forestry, and 3) a…
Technical determinants of competitive rifle shooting performance
2018
The purpose of this thesis was to identify technical determinants of elite level air rifle and biathlon standing shooting performance and investigate how these technical determinants are affected by training, competition situation, or intense exercise. Forty international and national level air rifle shooters and 17 biathletes participated in the studies. In air rifle shooting, shooting performance, aiming point trajectory, and postural balance were measured from each shot in a simulated competition series in the training situation and in the actual competition situation. The shooters’ competition results were collected from each measured season. In biathlon, the same shooting technical var…
Optimismin ja tavoiteristiriitojen yhteydet työhyvinvointiin nuorilla esimiehillä
2014
Tässä tutkimuksessa selvitettiin optimismin ja tavoiteristiriitojen yhteyksiä työn imuun ja työuupumukseen nuorilla esimiehillä. Tutkimuksen lähtöoletuksena oli, että optimistit kokevat tavoiteristiriitojen kielteiset vaikutukset hyvinvointiin muita vähäisempinä. Tämän lisäksi korkean optimismin oletettiin olevan yhteydessä vähäisempiin tavoiteristiriitoihin. Tutkimuksessa selvettiin myös tavoiteristiriitojen vaikutuksia työhyvinvointiin. Tutkimuksessa muuttujien vaikutuksia työhyvinvointiin selvitettiin poikkileikkaus- ja pitkittäistutkimusasetelmassa. Tutkimus perustuu vuonna 2006 aloitettuun nuorten esimiesten henkilökohtaisia tavoitteita ja työhyvinvointia kartoittavaan pitkittäisaineis…
THE IMPACT OF TAX COMPETITION AND HARMONISATION IN THE EU IN RELATION TO FISCAL OPTIMISATION
2018
Fiscal competition and harmonisation are topical issues and the controversy generated by preferences for one or the other is due to the effects they generate in the economies of the EU member states. The practice of tax competition to a smaller or larger extent by some of the Member States is often identified with tax optimisation practices. Thus, in the economies of developed or emerging countries, the effects are both on the labour market, in the collection of indirect taxes (VAT or excise duties), but also in the transfer of profits versus transfer prices. The European fora are working hard for the uniformity of European legislation, but also to determine the governments of the Member St…
Darba aizsardzības sistēmas pilnveidošana Latvijas Universitātes tehniskajam personālam - efektīvs līdzeklis darba organizācijā
2018
Maģistra darba tēma: “Darba aizsardzības sistēmas pilnveidоšana Latvijas Universitātes tehniskajam persоnālam - efektīvs līdzeklis darba оrganizācijā”. Darba autоre: Kristīne Juhņeviča. Darba zinātniskā vadītāja: Dr. med., asоciētā prоfesоre Ženija Rоja. Darbs izklāstīts uz 85 lpp., ietver 34 attēlus, 23 tabulas, 13 pielikumus, 36 infоrmatīvоs avоtus. Darbs sastāv nо 4 daļām. Pirmajā daļā apkоpоta un analizēta literatūra par darba aizsardzības sistēmu, tās izveidоšanu un pilnveidоšanu, оtrajā daļā aprakstītas pētījumā izvēlētās metоdes, trešajā daļā veikts darba aizsardzības sistēmas audits un identificēti darba vides riski, apkоpоti un analizēti aptaujā iegūtie dati, ceturtajā daļā - izstr…
Videi nevalstisko organizāciju tiesības vērsties Satversmes tiesā: tiesiskā regulējuma īpatnības un problēmas
2016
Maģistra darba mērķis ir izpētīt privāto tiesību juridisko personu, kuru darbības mērķis saistīts ar vides aizsardzību jeb vides nevalstisko organizāciju, tiesību vērsties Satversmes tiesā tiesisko regulējumu un no tā izrietošās īpatnības un problēmas. Maģistra darba rezultātā autore piedāvā pastāvošā tiesiskā regulējuma raksturojumu, tā problēmas un iespējamos risinājumus. Maģistra darba rezultātā autore secinājusi, ka tiesību dzīvot labvēlīgā vidē aizsardzība iespējama, vienlaikus efektīvi realizējot visus trīs tiesību dzīvot labvēlīgā vidē satura elementus – tiesības uz informāciju, tiesības uz līdzdalību un tiesības vērsties tiesā. Maģistra darbā izmantota literatūra latviešu, krievu un…
Chemical composition of the essential oil of Elaeoselinum asclepium (L.) Bertol subsp. meoides (Desf.) Fiori (Umbelliferae) collected wild in Central…
2020
In the present study, the chemical composition of the essential oils from flowers and leaves of Elaeoselinum asclepium(L.) Bertol subsp. meoides(Desf.) Fiori collected in Central Sicily was evaluated by GC and GC-MS. The main volatile components of the flowers were alpha-phellandrene (42.5%), terpinolene (15.7%), p-cymene (11.6%) and beta-phellandrene (10.2%), whereas the ones of the leaves were p-cymene (44.0%), alpha-pinene (13.2%), alpha-phellandrene (11.0%), beta-phellandrene (10.2%) and beta-pinene (9.2%). Furthermore, the antibacterial and antifungal activities against some microorganisms infesting historical art craft were determined. The essential oil from leaves (EL) showed to be p…