Search results for "Tos"
showing 10 items of 12217 documents
Kela ammatillisena kuntouttajana : toimintaa ohjaavan lainsäädännön tarkastelua vuosilta 1937-1991
2002
Notaarien perehdyttäminen käräjäoikeuksissa
2007
Energiaregiimi muutoksessa : diskursiivinen tarkastelu energiapolitiikasta sosioteknologisena muutoksena
2010
Tutkimus käsittelee suomalaista energiapolitiikkaa ja siinä tapahtuneita muutoksia vuosien 1997 ja 2008 välillä. Ilmastonmuutos, kansainväliset sitoumukset mukaan lukien EU-politiikka, maailmantalouden muutokset, muutokset fossiilisten polttoaineiden hinnassa ja saatavuudessa asettavat energiapolitiikan uudenlaisten haasteiden eteen. Lähtökohtana tutkimuksessa oli, että energiapolitiikka ei ole pelkkää teknologiapolitiikkaa eivätkä siihen liittyvät muutokset vain teknologia muutoksia, vaan muutoksia tapahtuu myös sosiaalisissa rakenteissa kuten vallitsevissa käytännöissä, symbolisissa merkityksissä, infrastruktuurissa. Tutkimuskysymykseksi muotoutui, onko energiaregiimi muuttunut. Tutkimuks…
Kiinan ulko-ja sotilaspolitiikka muutoksessa
2016
Temperature measurement in gas mixtures by femtosecond Raman-induced polarization spectroscopy
2003
European Conference on Nonlinear Optical Spectroscopy (ECONOS) MAR 30-APR 01, 2003 BESANCON, FRANCE; The potential of femtosecond Raman-induced polarization spectroscopy (RIPS) for the simultaneous determination of temperature and concentrations was investigated. These measurements were related to the rotational time response of the molecular gas mixture, which was measured as a function of the pump-probe time delay. The change of the polarizability anisotropy with respect to the vibrational levels was taken into account. The results of temperature measurements in pure CO2 showed good agreement with the values obtained by a thermocouple. The RIPS technique was also applied to a CO2-N2 gas m…
Realization of time-resolved two-vacuum-ultraviolet-photon ionization
2009
International audience; Ultrafast dynamics of excited molecules is studied through time-resolved two-vacuum-ultraviolet (vuv)- photon ionization using a nonlinear volume autocorrelator unit. The two-vuv-photon process is induced by the intense fifth harmonic radiation of a femtosecond Ti:sapphire laser. In a proof-of-principle experiment, ultrafast dynamics of excited ethylene and oxygen molecules are investigated. Molecular decay times are deduced by comparing the experimental data with the results of a numerical model that accounts for the spatial and temporal characteristics of the harmonic field. The present experiments pave a convenient way for time domain investigations in the vuv-xuv s…
Photodynamics studies of ligand-protected gold nanoclusters by using ultrafast transient infrared spectroscopy
2015
Highly monodisperse samples of three ligand-protected gold nanoclusters Au102(pMBA)44, Au144(SC2H4Ph)60, and a cluster tentatively identified as Au130(pMBA)50, were characterized by UV/vis and infrared spectroscopy, and their photodynamics was studied by transient absorption spectroscopy. The dynamics study for each cluster was performed by electronically exciting the cluster with a pump pulse in the visible or near infrared region and by monitoring the transient absorption of vibrational modes of the ligands with a mid-IR probe pulse. The photodynamics studies were used to determine the molecular or metallic behavior of the cluster, and also to gain important size dependent information abo…
FSH administration reduces significantly sperm apoptosis only in the case of high DFI value: a study in idiopathic dispermic patients
2012
Introduction: In the last decades sperm DNA quality has been recognized as one of the most important markers of male reproductive potential (Lewis and Aitken, 2005; Ozmen, 2007; Tarozzi, 2007), in contrast to standard semen parameters as sperm density, motility and morphology, which do not act as powerful discriminators between fertile and infertile men. DNA damage in the male germ line is a major contributor to infertility, miscarriage and birth defects in the offspring. In animal models, it has been unequivocally demonstrated that the genetic integrity of the male germ line plays a major role in determining the normality of embryonic development. In humans, many studies showed that sperm …
Diseño y síntesis de nuevos materiales conmutables basados en el fenómeno de transición de espín
2023
Esta Tesis Doctoral actúa como compendio de síntesis y caracterización de nuevos materiales, generalmente porosos, que presentan el fenómeno de transición de espín (en inglés Spin Crossover, SCO). El principal objetivo de la Tesis Doctoral ha consistido en el diseño de estos nuevos polímeros de coordinación que combinan de forma sincrónica el fenómeno SCO asociado a los centros metálicos de FeII con otras propiedades de interés, siendo la motivación última su futura aplicación en dispositivos espintrónicos. Más concretamente, los esfuerzos sintéticos se han dedicado a la obtención de polímeros de coordinación de tipo Hofmann 2D que presentan: propiedades anfitrión-huésped selectivas, fluore…