Search results for "HAP"
showing 10 items of 2767 documents
Developments in the evolutionary theory of social interactions
2016
Altruistic behaviour, which benefits others but harms the actor, can evolve when copies of the underlying genes are transmitted to future generations by related beneficiaries. While we know that the mechanism of ‘kin selection’ answers to how altruism can evolve, the answers to why and when it can evolve are still obscure. The first aim of this thesis is to shed light to the evolution of altruism by identifying factors that facilitate or promote it. I find that the conditions under which altruism can evolve follow surprisingly simple principles that are independent of the taxon-specific traits such as fecundity. Further, by analysing the unique aspects of haplodiploid sex determination syst…
Low-weight carboxylic acids as potential risk factor of compost phytotoxicity
2009
Being intermediates of organic matter degradation, low-weight carboxylic acids (LWCA) can occur at phytotoxic concentrations on bioactive soils or in the processed organic material applied to soil. While toxicity potentials and mixture effects of LWCA are still poorly known, the potential phytotoxicity of the biomaterials is difficult to assess. In the study effective concentrations (EC) of formic, acetic and propionic acids at non adjusted pH were obtained in short-term germination assays (48 h for cress, Lepidium sativum, and 120 h for ryegrass Lolium multiflorum) and subchronic growth assays (21d). Based on the EC values, LWCA inhibited more strongly plant growth than seed germination. I…
Role of low-weight carboxylic acids in phytotoxicity of composts
2013
Hiilihydraateista bioteknisesti valmistettavat merkittävät teollisuuskemikaalit
2010
Trinatriumfosfaattitankkauksen vaikutuksia mieskestävyysurheilijoiden kestävyyssuorituskykyyn
1999
Tutkimuksia rahapolitiikasta
2022
Pyöräilyyn suunnitellun epäsuoran VO2max -testin validointi
2016
Aerobisen suorituskyvyn määrittäjänä käytetään usein maksimaalista hapenottokykyä (VO2max). VO2max -arvojen avulla voidaan muun muassa monitoroida yksilön harjoittelustatusta tai terveydentilaa. Tämän tutkimuksen tarkoituksena oli selvittää kuinka tarkasti Firstbeat Technologies Oy:n kehittämä kuntotesti arvioi maksimaalista hapenkulutusta (VO2max), kun testi toteutetaan pyöräillen. Menetelmä laskee arvion VO2max -arvosta neuroverkkomallinnukseen perustuvalla menetelmällä, jossa käytetään määrittäjinä sykettä, kuormitusintensiteetin muutoksia (on/off -vaste) sekä sykevälivaihtelun avulla määritettyä hengitysfrekvenssiä. Tutkimukseen osallistui yhteensä 29 koehenkilöä, 15 naista (ikä 28,1 ± …
Kasvatetun siian (Coregonus lavaretus) ja kirjolohen (Oncorhynchus mykiss) maksa elintarvikkeena
2020
Happy heart syndrome. frequency, characteristics, and outcome of takotsubo syndrome triggered by positive life events
2021
Background: The association with a preceding stressor is a characteristic feature of takotsubo syndrome (TTS). Negative emotions before TTS are common and led to the popular term "broken heart syndrome." In contrast, pleasant triggers ("happy heart syndrome") are rare and are scarcely investigated. Objectives: The authors analyzed the frequency, clinical characteristics, and prognostic implications of positive emotional stressors in the multicenter GEIST (GErman-Italian-Spanish Takotsubo) Registry. Methods: Patients enrolled in the registry were categorized according to their stressors. This analysis compared patients with pleasant emotional events with patients with negative emotional even…
Numerical methods for acoustics and noise control
2010
Artikkeliväitöskirja. Sisältää yhteenveto-osan ja viisi artikkelia. Article dissertation. Contains an introduction part and five articles. This dissertation considers numerical methods for wave propagation modelling and noise control. The first part of the dissertation discusses an efficient method for solving time-harmonic wave equations in acoustic (the Helmholtz equation) and elastic domains (the Navier equation). The solver is based on preconditioning a Krylov subspace method, such as GMRES, with approximations of damped variants of the corresponding wave equations. An algebraic multigrid method is used in approximating the inverse of damped operators. The method can be used in complex …